Vehicle door lock system providing a plurality of spaced rotary latches

Abstract

A vehicle door lock system includes interior and exterior handle assemblies that are accessible, respectively, from interior and exterior sides of a vehicle door on which the door lock system is mounted. The system includes a plurality of rotary latches that are configured to releasably engage door-frame-mounted strikers to "latch" and "unlatch" the door, and a latch interconnection linkage for effecting concurrent unlatching of the rotary latches. The door is "locked" and "unlocked" by selectively enabling and disabling at least one driving connection between at least one of the handle assemblies and separate latch release arms that are arranged to operate a selected one of the rotary latches. In preferred practice, locking and unlocking of the door are effected either by operating an exterior key cylinder, or by operating an interior sill button.

Description

BACKGROUND OF THE INVENTION

1. Field of the Invention

The present invention relates generally to a door lock system for releasably latching and selectively locking a door of a motor vehicle such as a passenger car, van, truck, motor coach, recreational vehicle or the like. More particularly, the present invention relates to a novel and improved, extremely versatile door-mounted lock system that includes a plurality of rotary latches that are interconnected by a linkage assembly for concurrent operation, with the rotary latches being operable to securely releasably engage a plurality of door-frame-mounted strikers, and with the connection linkage assembly providing a highly versatile means for connecting the rotary latches with a wide variety of commercially available interior and exterior operating handle assemblies, with a wide range of key cylinder and sill button hardware, and with almost any desired relative mounting arrangement of the rotary latches, the interior and exterior operating handles, and other associated hardware.

2. Prior Art

It is customary to provide a side door of a vehicle such as an automobile, van, truck or the like with a door-carried lock system that is operable, when the door is closed adjacent a door frame that defines a passenger access opening, to "latch" the door as by bringing rotatable components of at least one rotary latch into surrounding and restraining, but selectively releasable engagement with at least one door-frame-carried striker.

It is customary, also, to provide a side door of a vehicle with interior and exterior handle assemblies that may be operated to "unlatch" the rotary latch or latches, and to thereby permit door movement out of its closed position.

Still further, it is customary to provide a key cylinder in association with the exterior handle assembly, with the key cylinder being operable selectively to "lock" and "unlock" components of the door lock mechanism as by selectively preventing and permitting the exterior door handle assembly from unlatching the door.

Typically, the door lock mechanism of a vehicle side door also can be "locked" and "unlocked" by vertically shifting what is referred to as a "sill button." The sill button usually takes the form of an elongate, interiorly accessible, vertically movable button that has a lower end region which is connected to a control rod that is housed within the structure of a door, and an upper end region that projects through a sill opening that is defined by the door structure at a location near the bottom level of a window opening that is defined by the door structure. Depressing the sill button to its lowermost or "locked" position causes the control rod to set components of the door lock mechanism to a "locked" configuration that will prevent at least the exterior handle assembly from unlatching the door. Raising the button to its uppermost or "unlocked" position causes the control rod to effect unlocking of components of the door lock system so that operation of the exterior handle assembly will function to unlatch the door.

Moreover, it is known to selectively provide door lock systems with "childproofing mechanisms" for assuring that, when components of the door lock system are locked, the interior handle assembly (in addition to the exterior handle assembly) will be prevented from unlatching the door. This feature of fully disabling an interior handle when a sill button has been depressed (i.e., when the door lock system has been "locked") is particularly desirable for use with vehicles that transport children, the intended purpose being to prevent unwanted opening of a vehicle door as the result of a child's tampering with or operating the interior handle assembly.

While vehicle door lock systems of a variety of configurations have been proposed, with many including so-called "childproofing mechanisms," prior proposals typically suffer from one or more drawbacks. One problem has been a lack of versatility of system components that severely limits not only the type, style, shape and/or structural configuration of doors with which a particular locking system proposal can be used, but also limits the relative arrangements of interior and exterior handle assemblies, key cylinder and sill button hardware with which a particular locking system proposal can be used. Moreover, the systems of prior proposals typically require custom made operating handle assemblies and/or other custom components, it being recognized that custom components often are relatively expensive to manufacture.

To the degree that some prior door lock system proposals are adaptable for use with commercially available components such as operating handle assemblies, key cylinder and sill button hardware, the complexity of the resulting door lock systems, and attendant difficulties of assembly and adjustment for proper operation that are encountered in installing the resulting systems often have proven to be undesirable and, in some cases, economically unfeasible.

Accordingly, despite a proliferation of prior door lock system proposals, a need has remained for an improved, highly versatile door lock system including one or more rotary latches of a well proven type, and an associated connection linkage assembly, with these components being so arranged and interconnected that they are capable of working in harmony with a wide range of commercially available interior and exterior operating handle assemblies, as well as with commercially available key cylinder and sill button hardware.

3. The Referenced Childproof Door Lock System Case

The invention of the referenced Childproof Door Lock System Case addresses the foregoing and other drawbacks of the prior art by providing a novel and improved vehicle door lock system that includes a rotary latch and a connection linkage assembly that is sufficiently versatile to permit its use with a wide variety of commercially available interior and exterior operating handle assemblies, as well as with commercially available key cylinder and sill button control hardware, with the connecting linkage including a capability for providing desired safety features, for example, a "childproof" feature that permits an interior operating handle to be selectively enabled and disabled for unlatching the rotary latch so that children cannot open a "locked" door by tampering with or operating the interior handle.

A feature of the preferred practice of the invention of the referenced Childproof Door Lock System Case resides in its utilization of a well proven basic type of rotary latch--a rotary latch that has proven its acceptability in commercial use. Another feature lies in use that is made of commercially available forms of door lock system hardware including interior and exterior operating handle assemblies, as well as key cylinder and sill button components. Stated in another way, the preferred practice of the invention of the referenced Childproof Door Lock System Case has the very significant advantage of not proposing a door lock system that is novel and unique throughout the range of elements that make up the system--rather, the invention, in its preferred practice, draws without reservation on strengths of proven designs and commercially available components which, with minimal cost, provide a highly reliable door lock system.

Another feature of the preferred practice of the invention of the referenced Childproof Door Lock System Case resides in providing as a "hub" or "centerpiece" of a door lock system, a novel rotary latch and connection linkage assembly of extremely versatile character that gives the system its capability to draw upon strengths, desired characteristics, and unique features of a host of commercially available door lock operating and control hardware such as commercially available interior and exterior operating handle assemblies, key cylinder and sill button hardware. Unlike many prior proposals, a vehicle door lock system that embodies the preferred practice of the invention of the referenced Childproof Door Lock System Case utilizes a rotary latch and connection linkage assembly that is easily adapted for use not only with a wide variety of vehicle door sizes, shapes and structural configurations, but also with a wide variety of relative arrangements of operating and control hardware, whereby commercially available hardware components can be positioned and oriented in almost any desired relative arrangement with respect to a selected position for the rotary latch and connection linkage assembly.

SUMMARY OF THE INVENTION

The present invention addresses a need that is not addressed by the application of the referenced Childproof Door Lock System Case, namely a requirement that is encountered in certain specialized vehicle applications to provide two or more rotary latches that are mounted at spaced locations and that are arranged to be operated cooperatively, in unison, to effect latching and locking of a vehicle door or other closure.

In one aspect, the present invention provides a simple and inexpensive means for converting a single-rotary-latch type door lock system to a plural-rotary-latch type door lock system. The system of the present invention can be utilized to convert a single-latch system to a plural-latch systems regardless of whether the single-latch system includes a "childproofing" mechanism; and, if the single-latch systems includes a childproofing feature, the childproof operational characteristics of the single-latch system are extended to the rotary latches of the plural-latch system.

In another aspect, the present invention provides an improvement or extension that can be utilized with a door lock system of the type that forms the subject matter of the referenced Childproof Door Lock System Case to convert the single-rotary-latch type system that forms the subject matter of the referenced Childproof Door Lock System Case to a plural-rotary-latch type door lock system. Where the system of the present invention is utilized in conjunction with the preferred practice of the invention of the referenced Childproof Door Lock System Case, the several advantageous features of the invention of the referenced Childproof Door Lock System Case are preserved and extended in their scope of operation to the latches of the resulting plural latch system.

In most preferred practice, a vehicle door lock system of the present invention includes interior and exterior handle assemblies that are accessible, respectively, from interior and exterior sides of a vehicle door on which the door lock system is mounted. The system includes a plurality of rotary latches that are configured to releasably engage a plurality of door-frame-mounted strikers to "latch" and "unlatch" the door, and a latch interconnection linkage for effecting concurrent unlatching of the rotary latches. The door is "locked" and "unlocked" by selectively enabling and disabling driving connections between at least one of the handle assemblies and separate release arms that are arranged to operate a selected one of the rotary latches.

In most preferred practice, locking and unlocking of the vehicle door are effected either by operating an exterior key cylinder, or by operating an interior sill button. The handle assemblies, the key cylinder and the sill button preferably are commercially available units that are arranged as may be appropriate for use with a particular vehicle door, with these units being interconnected for operation by a novel and highly versatile linkage, with elements of the linkage being operable to interact so that, (1) when the door is "latched" but not "locked," either of the handle assemblies may be operated to unlatch the door, (2) when the door is both "latched" and "locked," at least one of the handle assemblies is disabled from being operated to unlatch the door, and, (3) such locking and unlocking movements as are executed by the key cylinder will cause corresponding movements of the sill button between its locked and unlocked positions.

BRIEF DESCRIPTION OF THE DRAWINGS

The foregoing and other advantages, and a fuller understanding of the invention that is described and claimed in the present application may be had by referring to the following description and claims taken in conjunction with the accompanying drawings wherein:

FIG. 1 is a side elevational view of one preferred embodiment of a vehicle door lock system as viewed from an interior of a side door of a vehicle on which the system is mounted, with the door and portions of door-frame-carried strikers being shown in phantom, with portions of the door and the door lock system being foreshortened, and with components of the door lock system being depicted in their "latched" and "locked" configuration;

FIG. 2 is a side elevational view similar to FIG. 1, but with both an interior handle assembly and an exterior handle assembly of the door lock system being actuated while the system is "locked," whereby the interior handle assembly is operative to "unlatch" the door, but the operation of the "locked" exterior handle assembly serves no unlatching function;

FIG. 3 is a side elevational view similar to FIG. 1, but with components of the door lock system in their "latched" and "unlocked" configuration;

FIG. 4 is a side elevational view similar to FIG. 3, but with an exterior handle assembly of the door lock system being operated while the system is "unlocked," whereby the rotary latches of the door lock system are "unlatched" to release their strikers, and with this view also illustrating that operation of the exterior handle assembly does not cause corresponding operation of the interior handle assembly;

FIG. 5 is a side elevational view similar to FIG. 3, but with the interior handle assembly being operated while the system is "unlocked," whereby the rotary latches are "unlatched" to release their associated strikers, and with this view also illustrating that operation of the interior handle assembly does not cause corresponding operation of the exterior handle assembly;

FIG. 6 is a side elevational view from an exterior side of the door, with components of the door lock system oriented as depicted in FIG. 1 so that the door is both "latched" and "locked;"

FIG. 7 is an exploded perspective view of selected components of the exterior operating handle assembly as well as connected linkage assembly element, with some of the linkage elements being foreshortened;

FIG. 8 is an exploded perspective view, on an enlarged scale, of selected components of two rotary latch assemblies as well as connected linkage assembly elements, with some of the linkage elements being foreshortened;

FIG. 9 is an exploded perspective view of selected linkage assembly components;

FIG. 10 is a perspective view of selected elements of the linkage assembly;

FIG. 11 is a somewhat schematic end elevational view, as viewed substantially from a plane indicated by a line 10--10 in FIG. 1, depicting components of the rotary latches in their "latched" configuration surrounding and restraining associated strikers;

FIG. 12 is a view similar to FIG. 11 but depicting components of the rotary latches in configurations that are intermediate their "latched" and "unlatched" positions, but, nonetheless, engaging and restraining their associated strikers;

FIG. 13 is a view similar to FIGS. 11 and 12, but depicting components of the rotary latches unit in their "unlatched" configuration, with the strikers being released as during ,opening or closing of the door; and,

FIG. 14 is a side elevational view similar to FIG. 1, but illustrating the application of features of the present invention to a "childproof rotary door lock system of the type that forms the subject matter of the referenced Childproof Door Lock System Case.

DESCRIPTION OF THE PREFERRED EMBODIMENT

Referring to FIGS. 1-6, portions of a side door of a vehicle are indicated generally by the numeral 10 and are shown in phantom. The door 10 has a window sill that is designated by the numeral 12. Also shown in phantom in FIGS. 1-5 are portions cf two elongate, cantilevered striker pins 14, 14' that are mounted on door frame portions (not shown) of the vehicle and that extend adjacent to the door 10 when the door 10 is closed. The striker pins 14, 14' have generally cylindrical central portions 16, 16' that are shown in cross section in FIGS. 11-13. The striker pins 14, 14' have hex head formations 18, 18' at their distal ends, as is shown in FIG. 13.

A vehicle door lock system that embodies one form of preferred practice of the present invention is indicated generally by the numeral 20. While the system 20 includes no "childproofing" feature to disable an internal door handle when the system 20 is "locked," an application of features of the present invention to a door lock system 20" that includes a "childproof" feature is depicted in FIG. 14, as will be explained in greater detail.

In brief overview, FIGS. 1-5 depict components of the door lock system 20 as viewed from an interior side of the door 10. FIG. 6 depicts components of the door lock system 20 as viewed from an exterior side of the door 10. In FIGS. 1 and 6, the door 10 is "locked," with rotary latches 600, 600' of the door lock system 20 in "latched" engagement with the strikers 14, 14'. In FIG. 3 the door 10 is "unlocked" but "latched." FIGS. 2, 4 and 5 show the door 10 "unlocked" and "unlatched."

The door lock system 20 incorporates several commercially available components including an interior operating handle assembly 100, an exterior operating handle assembly 200, an exterior key cylinder assembly 300 (that typically is sold as a part of the exterior handle assembly 200), and an interior sill button 400. The door lock system 20 also includes a pair of commercially available rotary latches 600, 600' together with a latch-and-handle connection linkage 500 and a novel latch unit interconnection linkage assembly which is indicated generally by the numeral 800. The linkage assembly 500 interconnects the components 100, 200, 300, 400 and 600, while the latch unit interconnection linkage 800 interconnects the rotary latches 600, 600' for concurrent unlatching operation, as will be explained.

Turning now to a more detailed discussion of the components of the door lock system 20, and referring particularly to FIGS. 1 and 6, the interior operating handle assembly 100 is of a commercially available type sold by Eberhard Manufacturing Company, Cleveland, Ohio 44136, under the model designation 1-29908. A substantially identical unit also is available from A. E. Merchandising Limited, Kings Norton, Birmingham B30 3AR, England, under the same model designation, namely 1-29908. While the construction and arrangement of components of the commercially available interior handle assembly 100 form no part of the present invention, a brief description of selected features thereof will be provided in order to enable the reader to better understand and appreciate how the rotary latch and connection linkage assembly 500 serve to accommodate and enhance characteristics of the interior operating handle assembly 100.

The interior handle assembly 100 includes a housing 102 which is preferably formed from metal or plastics material as a cast or molded structure. An operating handle 104 is pivotally mounted on the housing 102 for movement between a "normal" seated or nested position (as depicted in FIGS. 1, 3, 4 and 6) to an operating position (as depicted in FIGS. 2 and 5). Referring to FIG. 6, an arm 106 projects rearwardly with respect to the housing 102. The arm 106 is an integral projecting part of the handle 104 (which does not appear in FIG. 6), and moves with the handle 104 when the handle 104 is pivoted relative to the housing 102.

An operating rod 510 has one end region that is pivotally connected to the arm 106 to couple the operating rod 510 to the handle 104 for movement in response to pivotal movement of the handle 104 with respect to the housing 102. A compression coil spring 112 surrounds a portion of the operating rod 510 and engages a portion of the handle assembly 100 for biasing the operating rod 510 in a direction that tends to bias the handle 104 toward its seated or nested position, i.e., away from its operating position, whereby the handle 104 tends to remain seated or nested with respect to the housing 102.

The exterior operating handle assembly 200 is of a commercially available type sold by Eberhard Manufacturing Company, Cleveland, Ohio 44136, under the model designations 1-25653 and 1-25654 (for left and right hand units, respectively). Substantially identical units also are available from A. E. Merchandising Limited, Kings Norton, Birmingham B30 3AR, England, under the same model designations, namely 1-25653 and 1-25654 (for left and right hand units, respectively). While the construction and arrangement of components of the commercially available exterior handle assembly 200 form no part of the present invention, a brief description of selected features thereof will be provided in order to enable the reader to better understand and appreciate how the rotary latch and connection linkage assembly 500 serve to accommodate and enhance various characteristics of the exterior operating handle assembly 200.

Referring primarily to FIG. 7 in conjunction with FIGS. 1-6, the exterior operating handle assembly 200 includes a housing 202 which is preferably formed from metal or plastics material as a cast or molded structure. Referring to FIG. 6, an operating handle 204 is pivotally mounted on the housing 202 for movement between a "normal" seated or nested position (as depicted in FIGS. 1, 3, 5, and 6) to an operating position (see FIGS. 2 and 4). Referring to FIG. 7, the handle 204 has an arm portion 206 that projects rearwardly with respect to the housing 202. A primary operating rod 210 of elongate configuration has one end region 214 that is pivotally connected to the arm portion 206. Referring to FIGS. 1-5, an opposite end region 216 of the primary operating rod 210 projects through a hole formed in a rearwardly projecting housing formation 208 to mount the rod 210 on the housing 202 for translation in response to pivotal movement of the handle 204 with respect to the housing 202. The rod 210 has an end that defines a rounded engagement surface 220.

A compression coil spring 212 surrounds a central portion of the operating rod 210 and engages the housing projection 208. The spring 212 biases the operating rod 210 in a direction that tends to bias the handle 204 in a direction toward its seated or nested position, i.e., away from its operating position, whereby the handle 204 tends to remain seated or nested with respect to the housing 202.

Referring to FIG. 7, an assembly 250 of relatively movable components is provided on the back of the housing 202 for selectively drivingly connecting the primary operating rod 210 to an external operating rod 520, and for interconnection with the exterior key lock cylinder 300. The assembly 250 includes primary and secondary operating levers 252, 254 that cooperate with a connecting pin 256 to transfer motion from the primary operating rod 210 to the exterior operating rod 520, as will be explained. However, before further describing the components of the assembly 250 and their interconnecting functions, features of the exterior key lock cylinder assembly 300 will be discussed.

Referring to FIGS. 6 and 7, the exterior key lock cylinder assembly 300 preferably is of a type that has a cylinder housing 302 which is formed as an integral part of the housing 202 of the exterior operating handle assembly 200. The assembly 300 has a key-receiving cylinder plug 306 that is journaled by the cylinder housing 302. While the type of key lock assembly 300 that is depicted in the drawings is sold as an integral sub-assembly of the exterior operating handle assembly 200, it will be understood that substitute or similar forms of key cylinder assemblies may be selected for use from any of a wide variety of commercially available units. Typically, such units have internally carried tumblers (not shown) or other suitable locking structure with common basic characteristics (1) that will permit the cylinder plug 306 to be rotated with respect to the housing 302 only in response to insertion into the plug 306 and rotation therewith of an appropriately configured key (not shown); (2) that define a single relative orientation of the plug 306 and the housing 302 that must be achieved before the key 308 can be removed from the plug 306; and, (3) that permit the plug 306 to be rotated through a range of movement extending through about seventy five degrees of rotation in either of two directions as measured from the orientation of the plug 306 relative to the housing 302 wherein key removal from the plug 306 is permitted.

Referring to FIGS. 1-5 and 7, a feature of the key lock cylinder assembly 300 is that the rotatable plug 306 is drivingly connected to an L-shaped crank arm 262 which can be thought of as comprising an element of the assembly 250. The crank arm 262 has one leg 264 which connects with the exterior control rod 530, and another leg 266 that is connected by a link 270 to the connecting pin 256 The connecting pin 256 serves to provide or prohibit a driving connection between the primary and secondary operating levers 252, 254. A fastener 272 pivotally connects the levers 252, 254 to the housing 202.

The levers 252, 254 have overlying radially extending slots 282, 284 formed therein that permit the connecting pin 256 to move from a connecting position shown in FIGS. 3, 4 and 5 to a disconnecting position shown in FIGS. 1, 2 and 6. The primary operating lever 252 has an arcuate slot portion 286 that connects with the inner end region of its radially extending slot 282, wherein the connecting pin 256 can move freely without causing a driving connection to be established between the levers 252, 254 when the connecting pin 256 is caused to be positioned by the link 270 in its disconnecting position, as is shown in FIG. 2 where operation of the external operating handle assembly 200 is shown to have no influence on the external operating rod 520 that would tend to move the exterior release are 620 to unlatch the latch unit 600.

While the entire exterior operating handle assembly 200 as shown in FIG. 7 is a commercially available unit (for which substantially equivalent and alternate forms of handle assemblies can be substituted as may be preferred) that therefore need not be described in detail, one further feature will be discussed, namely the provision of a multipurpose torsion coil spring 290 that is interposed between the housing 202 and the levers 252, 254 to bias the levers 252, 254 in a clockwise direction as viewed in FIGS. 1-5, and to thereby bias the external operating rod 520 in an upward direction. This feature helps to retain the external operating rod 520 from sliding downwardly when the interior operating handle assembly 100 operates the interior latch release arm 610, whereby the external latch release arm 620 is no longer caused to be biased in a direction that would tend to cause the external operating rod 520 to remain in its upward position. This feature (namely the provision of the torsion coil spring 290) is desirable from the viewpoint that it helps to keep such components as the levers 252, 254 and the external operating rod 520 from becoming loose and being subject to vibration.

Referring to FIGS. 1-6, the interior sill button 400 is of a commercially available type sold by Eberhard Manufacturing Company, Cleveland, Ohio 44136, under the model designation 7-26668. A substantially identical unit is also available from A. E. Merchandising Limited, Kings Norton, Birmingham B30 3AR, England, under the same model designation, namely 7-26668. While the construction and arrangement of the commercially available interior sill button 400 forms no part of the present invention, a brief description thereof will be provided in order to enable the reader to better understand and appreciate how the connection linkage assembly 500 accommodates and utilizes the button 400 to in conjunction with other components of the door lock system 20.

The interior sill button 400 is an elongate one-piece member that preferably is formed from rigid plastics material. The sill button 400 has a hollow lower end region 402 that is press-fit or threaded onto the operating rod 530, and an enlarged upper end region 404 that projects above the window sill 12 for actuation by an operator's hand. When the sill button 400 is depressed, as is shown in FIG. 1, the door lock 10 is "locked" such that attempted operation of the exterior handle assembly 200 will be ineffectual (as is illustrated in FIG. 2) to effect unlatching of the latches 600, 600'; however, when the sill button 400 is depressed, the interior handle assembly 100 may be operated to effect concurrent unlatching of the latches 600, 600', as is shown in FIG. 2. When the sill button 400 is raised, as is shown in FIGS. 3-5, the door lock 20 is "unlocked" so that operation of either of the handle assemblies 100, 200 will operate to unlatch the rotary latch units 600, 600', as is shown in FIGS. 4 and 5.

A feature of the elements of the exterior handle operating assembly 200 is that locking and unlocking movements of the key cylinder 300 (which sets elements of the exterior handle operating assembly 200 to enable and disable the exterior handle assembly 200 from moving the exterior operating rod 520) cause corresponding vertical movements of the exterior control rod 530 to position the sill button 400 so that the position of the sill button 400 is indicative of the "locked" or "unlocked" condition of the door lock system 20 (i.e., a raised sill button 400 indicates that the system 20 is "unlocked" to enable operation of the exterior handle assembly 200 to "unlatch" the latch assemblies 600, 600', while a lowered sill button 400 indicates that the system 20 is "locked" to prevent unlatching of the latches 600, 600' by the exterior handle assembly 200).

Because the rotary latch units 600, 600' are substantially identical (except for the fact that the units 600, 600' are "left" and "right hand assemblies, respectively, and except for the inclusion in the latch unit 600' of a pair of release levers 610, 620 that are not present in the latch unit 600'), only the components of the latch 600 will be described in detail. It will be understood that such components of the latch 600' as correspond to components of the latch unit 600 are designated in the drawings by corresponding numerals bearing a "prime" mark.

Referring to FIG. 8 in conjunction with FIGS. 10-12, the rotary latch unit 600 has a housing which is formed as an assembly of two side plates 626, 628 and three bushings 630, 632, 634. The bushings 630, 632, 634 extend through aligned holes 640, 642, 644 and 650, 652, 654 that are formed in the side plates 626, 628. Reduced diameter end regions 660, 662, 664 of the bushings 630, 632, 634 are crimped (not shown) into engagement with the side wall plates 626, 628 to form a rigidly assembled housing. The bushings 630, 632, 634 have stepped central regions with relatively small diameter portions 670, 672, 674 and relatively large diameter portions 680, 682, 684.

The rotary latch bolts 602, 604 and the pawl 614 are pivotally mounted on the small diameter portions 670, 672, 674, respectively, for rotary movement between fully latched positions shown in FIG. 10, and unlatched positions shown in FIG. 12. Intermediate "preliminary" latching positions of these members are illustrated in FIG. 11.

Torsion spring coils 690, 692, 694 are reeved around the large diameter portions 680, 682, 684 of the bushings 630, 632, 634 to bias the rotary latch bolts 602, 604 and the pawl 614 in directions that are indicated, respectively, by arrows 603, 605 and 613 in FIG. 8.

Aligned notches 636, 638 are formed in the side plates 626, 628. The notches 636, 638 are of such size and configuration as will permit the central portion 16 of the striker pin 14 to be relatively loosely received therein. An inwardly turned tab 646 is formed integrally with the side plate 626. A pair of abutment surfaces 647, 648 are defined on opposite sides of the inwardly turned tab 646.

The latch unit 600 (but not the latch unit 600') has an outwardly turned tab 656 that is formed as an integral part of the side plate 628. A hole 657 is formed through the tab 656. A mounting pin or rivet 658 extends through the hole 657 and through aligned holes 668, 669 that are formed in the release levers 610, 620 to pivotally mount the release levers 610, 620 on the latch unit 600. Release projections 676, 678 are formed on the levers 610, 620 for engaging the pawl 614 to move it to release its retaining engagement with the rotary latch bolt 604 and to thereby release or "unlatch" the latch bolts 602, 604 for movement to their unlatched position under the influence of the torsion coil springs 690, 692.

The latch unit 600' (but not the latch unit 600) has a hole 615' formed through the pawl 614' to receive a hook-shaped upper end region 868 of an elongate connecting linkage element 860 that serves to move the pawl 614' to release its engagement with the rotary latch bolt 604' to "unlatch" the rotary latch unit 600' in unison with the unlatching of the rotary latch unit 600, as will be explained.

Referring to FIGS. 10-12 in conjunction with FIG. 8, the rotary latch bolt members 602, 604 are provided with concave recesses 606, 608, stop formations 616, 618, cam surfaces 619, 621, and spring end engagement surfaces 623, 625. The recesses 606, 608 are operable to receive the striker 14 as the door 10 is moved toward its closed position. The stop formations 616, 618 engage each other as the door 10 reaches its closed position, thereby preventing further rotation of the latch bolts 602, 604 in a latching direction of movement. The cam surfaces 619, 621 are configured to cooperate with each other to facilitate concurrent movement of the latch bolt members 602, 604 between their latched and unlatched positions. The spring end engagement surfaces 623, 625 engage spring end portions 693, 695 which project from the spring coil portions 690, 692.

A plurality of abutment formations 663, 665, 667 are provided on one side of the latch bolt 604. The pawl 614 has a tooth formation 633 which is selectively engageable with the abutment formations 663, 665, 667. The pawl 614 of the rotary lock unit 600 has a projection 635 which may be engaged by the abutment surface 648 on the tab 646 and by the release levers 610, 620; this is in contrast to the hole 615' that is formed through the pawl 614' to permit the upper end region of the connecting link element 860 to connect directly to the pawl 614' to operate the pawl 614' without the need for one or more pawl-operating levers (such as the levers 610, 620). The pawl 614 is biased by the coil spring portion 694 toward positions which will bring the tooth 633 into engagement with one of the abutment formations 663, 665, 667.

The operation of the rotary latch unit 600 is best understood by referring to the sequence of positions illustrated in FIGS. 11-13. In FIG. 13, the unlatched position of the rotary latch bolts 602, 604 and of the pawl member 614 are shown. In this position, the pawl tooth 633 engages the abutment formation 663. Beginning with the members 602, 604, 614 positioned as shown in FIG. 13, when the door 10 is moved toward the striker 14, the striker pin 14 moves into the side wall notches 636, 638 and into the latch bolt recesses 606, 608. As the striker 14 continues to move inwardly with respect to the notches 636, 638, the rotary latch bolts 602, 604 are rotated toward the intermediate position shown in FIG. 12. As soon as the latch bolt members 602, 604 reach the intermediate position shown in FIGURE 12, the pawl tooth 633 pivots under the influence of the coil spring portion 694 into engagement with the abutment formation 665. Continued inward movement of the striker 14 into the notches 636, 638 causes the rotary latch bolts 602, 604 to further rotate toward their latched positions as shown in FIG. 11. As soon as the rotary latch bolt members 602, 604 are in their latched positions, the stop formations 616, 618 engage each other to prevent further latching rotation of the latch bolt members 602, 604, and the pawl tooth 633 engages the abutment formation 667 thereby releasably retaining the rotary latch bolts 602, 604 in their latched positions.

In order to open the door 10, one of the interior and exterior operating handle assemblies 100, 200 is operated to cause one of the release levers 610, 620 of the latch unit 600 shown in FIG. 8) to pivot about the axis of the rivet 658. As one of the release levers 610, 620 pivots about the axis of the rivet 658, its associated operating projection 676 or 678 is brought into engagement with the projection 635 on the pawl 614, causing the pawl 614 to rotate to bring the tooth formation 633 out of engagement with the abutment formations 665, 667, thereby permitting the rotary latch bolt members 602, 604 to move to their unlatched positions under the influence of the coil spring portions 690, 692.

To effect concurrent unlatching of the latch units 600, 600', the rotary latch unit interconnection linkage 800 is provided to drivingly interconnect the pawls 614, 614' of the rotary latch units 600, 600' for concurrent unlatching movement (i.e., to release and rotate the pawls 614, 614' in unison to effect the type of unlatching movements that are described above in conjunction with the operation of the latch unit 600). Referring to FIGS. 1-6 in conjunction with the enlarged, exploded views of FIGS. 7 and 8, the interconnection linkage 800 includes an operating arm 810 that is pivotally connected to the outwardly turned tab 656 of the rotary latch unit 600 by the same mounting pin or rivet 658 that pivotally mounts the latch release arms 610, 620 on the unit 600.

Referring to FIGS. 7 and 8, the operating arm 810 is of generally elongate configuration but has something of an offset, doglegged shape. A hole 812 is formed through an offset portion 813 of the operating arm 810 to receive the mounting pin or rivet 658. Three in-line holes 814, 816, 818 are formed through the operating arm 810 at spaced locations along its length to rigidly receive and immovably mount three headed pins 824, 826, 828.

The pins 824, 826, 828 extend through the holes 814, 816, 818, respectively, and project beyond one side of the arm 810 for drivingly engaging other operating elements The pins 824, 826 are arranged to extend into the paths of unlatching movement of the latch release arms 620, 610, respectively, so as to cause the operating arm 810 to be pivoted in response to unlatching movement o either of the latch release arms 620, 610. As is best seen in FIGS. 1, 3 and 6, the operating arm 810 normally assumes an upstanding orientation tilted slightly left of vertical. However, as is illustrated in FIGS. 2, 4 and 5, in the event that either of the latch release arms 620, 610 is pivoted to effect unlatching of the latch unit 600, the operating arm 810 is caused to be rotated clockwise to a position inclined rightwardly of vertical.

The pin 828 extends into an elongate slot 832 formed in a motion transfer arm 830. The arm 830 is of generally L-shaped configuration, having leg portions 834, 836 that project from a central region 838 where a hole 840 (shown in FIG. 8) is formed through the arm 830 to receive a mounting pin 842 that pivotally mounts the arm 830 on a bracket 844. The bracket 844 is configured for mounting on the door 10 that supports the rotary latch units 600, 600'. The bracket 844 (best seen in FIG. 9) has an inturned flange portion 846 that engages one end region 852 of a torsion coil spring 850 which is coiled about the mounting pin 842. An opposed end region 854 of the spring 850 engages the arm 830 to bias the arm 830 in a clockwise direction, as indicated by an arrow 856 in FIG. 10.

Referring to FIGS. 1-6 and 8, an elongate connecting link 860 has an end region 862 that connects with a pin 864 which extends through a hole 866 formed in the outer end region of the leg portion 836 of the arm 830 The link 860 has a hook shaped upper end region 868 that extends through the hole 615' that is formed in the pawl 614' for operating the pawl 614' to unlatch the rotary latch unit 600', as has been described.

The biasing action of the torsion coil spring 850 (see FIG. 9) serves to counteract the weight of the connecting link 860 (see FIG. 8) and thereby prevents the weight of the connecting link 860 from operating the pawl 614' to unlatch the latch unit 600'. Also, the biasing action of the torsion coil spring 850 serves to prevent rattling vibratory movements of the link 860 and the arms 810, 830.

The elongate slot 832 that is formed in the leg 834 of the arm 830 is needed inasmuch as the arms 810, 830 are configured and mounted for movement in such a way that the pin 828 needs to move along the length of the leg 834 during concurrent rotation of the arms 810, 830 between their normal position (see FIGS. 2, 4 and 5) and their unlatching position (see FIGS. 1, 3 and 6).

Referring to FIG. 14, a lock system 20" is shown that illustrates a preferred manner in which features of the present invention can be utilized to convert a single-rotary-latch system to a plural-rotary-latch system. The system 20" is identical in all respects to the latch system that is described in the referenced Childproof Door Lock System Case except for the addition thereto of a second rotary latch 600'" together with such latch interconnection components 800" as have already been described for enabling a pair of rotary latches 600", 600'" to operate in unison to effect concurrent unlatching to release a latched door 10". Viewed in a different way, the system 20" will be seen to be substantially identical in structure and operation to the system 20 described above except for the incorporation into the system 20" of a connection linkage unit 700" that serves to provide a "childproofing" feature (i.e., a feature whereby, when the system 20" is "locked" (as by operation of either a key cylinder plug 306 that is associated with an exterior handle assembly 200", or by operation of a sill button 400"), the interior handle assembly 100 is prevented from effecting unlatching of the door if it is operated without first unlocking the lock as by operating the key cylinder plug 306 or by raising the sill button 400").

While reference is made herewith to the disclosure of the referenced Childproof Door Lock System Case for a complete description of the features of the linkage unit 700" and its hookup and function, a brief description will be provided of several of its attributes. In FIG. 14 reference numerals designating components of the system 20" are assigned in a manner that corresponds to the assignment of numerals that are used herein to designate components of the above-described system 20; moreover, the same reference numerals as are used in FIG. 14 are employed in the referenced Childproof Door Lock System Case (except that the numerals used in FIG. 14 typically have "double prime" marks added thereto).

Referring to FIG. 14 (and to the disclosure of the Childproof Door Lock System Case), a feature of the connection linkage unit 700" lies in its provision of a compact array of overlying, pivotally mounted levers 702", 704", 706", 708" that connect with opposed operating rods 510", 510'", and with opposed control rods 530", 540". The control rods 530", 540" operate to enable and disable the interior operating handle assemblies 100", 200" from operating the interior and exterior release levers 610", 620". The operating rods 510", 510'" effectively comprise segments of what has been described in conjunction with the system 20 as a single operating rod 510 that (transmits forces through the connecting lever unit 700" and thereby) operates the interior release lever 610" of the rotary latch unit 600" in response to operation of the interior handle assembly 100", but only when the door 10" is "unlocked." The connection linkage 700" also includes a separate exterior operating rod 520" that connects the exterior operating handle assembly 200" with the exterior release lever 620" for unlatching the rotary latch unit 600" in response to operation of the exterior handle assembly 200", but only when the door 10" is "unlocked."

In operation, the elements mentioned above cooperate to assure that: (1) when the door 10" is "latched" but not "locked," either of the handle assemblies 100," 200" may be operated to unlatch the door 10"; (2) when the door 10" is both "latched" and "locked," neither of the handle assemblies 100", 200" may be operated to unlatch the door 10" and, (3) such locking and unlocking movements as are executed by the key cylinder 300" will cause corresponding movements of the sill button 400" between its locked and unlocked positions, whereby the positioning of the sill button 400" is operative to provide an indication of the "locked" and "unlocked" status of the door lock system 20".

To the extent that a further discussion of features of the system 20" may interest the reader, the disclosure of the Childproof Door Lock System Case (incorporated herein by reference) provides a full description and drawings that disclose other features of the structure and operation of the system 20".

Because the interconnected manner in which the rotary lock units 600", 600'" operate in the system 20" does not differ from the manner in which the interconnected rotary lock units 600, 600' operate in the system 20, no further description needs to be provided here to enable one skilled in the art to understand how features of the present invention can be utilized to convert a single-latch system to a plural latch system. While, in theory, an unlimited number of rotary latch units can be coupled to the described latch 600 of the system 20 (or the described latch 600" of the system 20"), as a practical matter, the force that is needed to effect unlatching operation of a typical rotary latch 600, 600', 600" or 600'" is sufficient in magnitude that the number of rotary latches that can be incorporated in a single system ordinarily is limited to two or three. Dual latch systems of the type that have been described and illustrated herein have been found to work quite nicely in that they require a very reasonable application of force to effect an unlatching operation in most typical types of installations.

As will be apparent from the foregoing description, the present invention provides a door lock system that utilizes a novel and improved rotary latch interconnection linkage for permitting spaced rotary latches to be utilized to effect secure latching and locking of a closure in place on a vehicle or the like, with features of the latch interconnection linkage being usable with a wide variety of rotary latch systems to enable conversion of single-latch systems to plural-latch systems without a loss of other advantageous features of the various systems. Moreover, latch interconnection components that embody the preferred practice of the present invention can be utilized with commercially available door lock operating and control hardware of a wide variety of forms, and with the hardware arranged in a wide variety of orientations, as may be appropriate for use with a wide variety of door structures and door installation arrangements.

Although the invention has been described in its preferred form with a certain degree of particularity, it is understood that the present disclosure of the preferred form has been made only by way of example and that numerous changes in the details of construction may be resorted to without departing from the spirit and scope of the invention as hereinafter claimed. It is intended that the patent shall cover, by suitable expression in the appended claims, whatever features of patentable novelty exist in the invention disclosed.

Claims

1. A door lock system for a vehicle door that closes an access opening of a vehicle body, for securely latching the door in a closed position, and for locking the closed latched door, the system comprising:

(a) striker means including a plurality of striker members for attachment to a vehicle body at a plurality of spaced striker locations near an access opening of the vehicle body that is closable by a door of the vehicle;

(b) rotary latch means including a plurality of rotary latch units for attachment to the vehicle door at a plurality of spaced latch locations for rendering the door "latched " as by latchingly engaging the striker means for securely latching the vehicle door in a closed position, with the latch locations each being adjacent a separate one of the striker locations when the vehicle door is closed, and with each of the rotary latch units latchingly engaging a separate one of the striker members when the door is closed;

(c) latch operator means for attachment to the vehicle door, including:

(i) first operator means connected to the vehicle door at a first operator location which is spaced from each of the latch locations, with the first operator means being movable at the first operator location between a first normal position and a first latch operating position; and,

(ii) second operator means connected to the vehicle door at a second operator location which is spaced from each of the latch locations, with the second operator means being movable at the second operator location between a second normal position and a second latch operating position;

(d) latch unit interconnection means for drivingly interconnecting the rotary latch units to effect concurrent unlatching of the rotary latch units from latching engagement with their associated striker members;

(e) connection means for establishing a driving connection between the latch operator means and a selected one of the rotary latch units to normally enable the latch operator means to "unlatch" the door as by releasing the selected rotary latch unit from latchingly engaging its associated striker member and, through concurrent operation of the latch unit interconnection means, to release the other of the rotary latch units from latching engagement with their associated striker members to thereby enable the vehicle door to be moved from its closed position, the connection means including:

(i) first linkage means that extends along a first path from the first operator location to the latch location of the selected rotary latch unit, and with the first linkage means being drivingly connected to the first operator means at the first operator location and to the selected rotary latch unit at its latch location for normally establishing a driving connection that extends along the first path for enabling the first operator means to unlatch the door as by causing the rotary latch means to withdraw latching engagement of the rotary latch means with the striker means and to thereby unlatch the door in response to movement of the first operator means between the first normal position and the first latch operation position; and,

(ii) second linkage means that extends along a second path from the second operator location to the latch location of the selected rotary latch unit, and with the second linkage means being drivingly connected to the second operator means at the second operator location and to the selected rotary latch unit at its latch location for normally establishing a driving connection that extends along the second path for enabling the second operator means to unlatch the door as by causing the rotary latch means to withdraw latching engagement of the rotary latch means with the striker means and to thereby unlatch the door in response to the movement of the second operator means between the second normal position and the second latch operator position;

(f) lock control means for selectively disabling the normal driving connection that is provided by the connection means between the first operator means and the selected rotary latch unit means when the door is latched and to thereby "lock" the closed latched door against being unlatched, including first control means for selectively preventing the first linkage means from enabling the first operator means to unlatch the rotary latch means from latching engagement with the striker means;

(g) the first linkage means including a first release lever pivotally connected to the selected rotary latch unit for pivotal movement about a common axis between a first non-actuated position and a first release position for effecting unlatching of the selected rotary latch unit when the first release lever is pivoted to the first release position;

(h) the second linkage means including a second release lever pivotally connected to the selected rotary latch unit for pivotal movement about said common axis between a second non-actuated position and a second release position for effecting unlatching of the selected rotary latch unit when the second release lever is pivoted to the second release position;

(i) the rotary latch units other than the selected rotary latch unit each having a pawl that is pivotally movable to an unlatching position for effecting unlatching;

(j) the latch unit interconnection means including drive link means including separate drive links drivingly connected to the pawls of each of said other rotary latch units for pivoting the pawls thereof to their unlatching positions in response to unlatching of their associated separate drive links; and,

(k) the latch unit interconnection means additionally including an operating arm that is pivotally connected to the selected rotary latch means and to the drive link means for moving the drive link means to unlatch the other rotary latch means in response to pivotal movement of either of the first ad second release lever means into releasing engagement with the release means of the selected rotary latch.

2. The door lock system of claim 1 wherein the first control member is a sill button that is movable between locked and unlocked positions from an interior side of the vehicle door.

3. The door lock system of claim 2 wherein the first latch operator means includes an external door handle operating assembly that is operable from an external side of the door to unlatch the door, and the second latch operator means includes an internal door handle operating assembly that is operable from an internal side of the door to unlatch the door.

4. The door lock system of claim 1 wherein the first control member is a sill button that is movable between locked and unlocked positions from an interior side of the vehicle door.

5. The door lock system of claim 1 wherein the operating arm is pivotally connected to the selected rotary latch means for pivoting about said common axis, and the operating arm carries separate formation means for extending into paths of movement followed by the first and second release levers, respectively, in moving between their non-actuated positions and their release positions to effect unlatching movement of the operating arm about the common axis in response to unlatching movement of either of the first and second release levers about the common axis.

6. A door lock system for a vehicle door that closes an access opening of a vehicle body, for securely latching the door in a closed position, and for locking the closed latched door, the system comprising:

(a) striker means including a plurality of striker members for attachment to a vehicle body at a plurality of spaced striker locations near an access opening of the vehicle body that is closable by a door of the vehicle;

(b) rotary latch means including a plurality of rotary latch units for attachment to the vehicle door at a plurality of spaced latch locations for rendering the door "latched" as by latchingly engaging the striker means for securely latching the vehicle door in a closed position, with the latch locations each being adjacent a separate one of the striker locations when the vehicle door is closed, and with each of the rotary latch units latchingly engaging a separate one of the striker members when the door is closed;

(c) latch operator means for attachment to the vehicle door, including:

(i) first operator means connected to the vehicle door at a first operator location which is spaced from each of the latch locations, with the first operator means being movable at the first operator location between a first normal position and a first latch operating position; and,

(ii) second operator means connected to the vehicle door at a second operator location which is spaced from each of the latch locations, with the second operator means being movable at the second operator location between a second normal position and a second latch operating position;

(d) latch unit interconnection means for drivingly interconnecting the rotary latch units to effect concurrent unlatching of the rotary latch units from latching engagement with their associated striker members;

(e) connection means for establishing a driving connection between the latch operator means and a selected one of the rotary latch units to normally enable the latch operator means to "unlatch" the door as by releasing the selected rotary latch unit from latchingly engaging its associated striker member and, through concurrent operation of the latch unit interconnection means, to release the other of the rotary latch units from latching engagement with their associated striker members to thereby enable the vehicle door to be moved from its closed position, the connection means including:

(i) first linkage means that extends along a first path from the first operator location to the latch location of the selected rotary latch unit, and with the first linkage means being drivingly connected to the first operator means at the first operator location and to the selected rotary latch unit at its latch location for normally establishing a driving connection that extends along the first path for enabling the first operator means to unlatch the door as by causing the rotary latch means to withdraw latching engagement of the rotary latch means with the striker means and to thereby unlatch the door in response to movement of the first operator means between the firsts normal position and the first latch operator position; and,

(ii) second linkage means that extends along a second path from the second operator location to the latch location of the selected rotary latch unit, and with the second linkage means being drivingly connected to the second operator means at the second operator location and to the selected rotary latch unit at its latch location for normally establishing a driving connection that extends along the second path for enabling the second operator means to unlatch the door as by causing the rotary latch means to withdraw latching engagement of the rotary latch means with the striker means and to thereby unlatch the door in response to movement of the second operator means between the second normal position and the second latch operator position;

(f) lock control means for selectively disabling the normal driving connection that is provided by the connection means between the first operator means and the selected rotary latch unit means when the door is latched and to thereby "lock" the closed latched door against being unlatched, including first control means for selectively preventing the first linkage means from enabling the first operator means to unlatch the rotary latch means from latching engagement with the striker means; and,

(g) each of the rotary latch units includes;

(i) housing means including structure defining a notch into which the body portion of the striker means is admitted as the door is closed;

(ii) first and second bolt members pivotally supported by the housing means at spaced locations on opposite sides of the notch for movement between latching and unlatching positions;

(iii) each of the bolt members being provided with;

(A) a recess formation facing generally toward the notch for receiving and engaging the body portion of the striker means when the body portion is admitted to the notch; and,

(B) a cam surface which cooperates with the cam surface on the other of the bolt members for assisting to effect concurrent movement of the bolt members between their latching and unlatching positions;

(iv) the recess formation being configured such that, when the bolt members are in their unlatching positions, the striker means may be moved into and out of the notch, and such that when the striker means is received in the recess formations with the bolt members in their latching positions, the striker means is retained in the notch by the bolt members;

(v) first biasing means biasing the bolt members toward their unlatching positions;

(vi) one of the bolt members having at least one abutment formation thereon;

(vii) a pawl movably carried on the housing means and having tooth means which is engageable with the abutment formation for preventing unlatching movement of the bolt members;

(viii) second biasing means for biasing the tooth means into engagement with the abutment formation when the bolt members are moved to their latching positions;

(ix) operating means for moving the pawl in opposition to the second biasing means to release the tooth means from engagement with the abutment formation to permit the bolt members to move under the influence of the first biasing means toward their unlatching positions to release the striker means; and,

(x) the bolt members being provided with stop formations configured to engage each other when the bolt members are in their latching positions to prevent further rotation of the bolt members in directions away from their unlatching positions, and to thereby positively prevent the bolt members from becoming inoperably jammed together.

7. The door lock system of claim 6 wherein the recess formations are configured to close toward the striker means as the striker means is moved into the notch and as the bolt members move concurrently toward their latching positions.

8. The door lock system of claim 7 wherein the recess formations are configured such that, as they close toward each other, they serve to center the striker means with respect to opposite sides of the notch, whereby, when the bolt members are in their latching positions, they hold the striker means at a predetermined centered location out of engagement with such portions of the housing structure as define the notch.

9. The door lock system of claim 7 wherein the housing means is formed as an assembly including a pair of side plates and three parallel-oriented bushings positioned at spaced locations between the side plates.

10. The door lock system of claim 9 wherein each of the bolt members is journaled on a separate one of the bushings, and the pawl is journaled on the remaining one of the bushings.

11. A door lock system for a vehicle door that closes an access opening of the vehicle body, for securely latching the door in a closed position, and for locking the closed latched door, wherein the system includes a plurality of rotary latches mounted on a vehicle door for engaging a plurality of strikers mounted on the vehicle body, with both exterior and interior handle assemblies being mounted on the door and being operable to unlatch the door except that, when the system is locked, at least the exterior handle assembly is disabled and with the system comprising:

(a) striker means including a plurality of striker members mounted on a vehicle body at spaced striker locations which are adjacent a body access opening that provides access from an exterior of the body to an interior of the body, with the access opening being selectively closable by a vehicle door;

(b) rotary latch means including a plurality of rotary latch units mounted on a vehicle door that is movable between open and closed positions to selectively close the body access opening, with the rotary latch means being operable to render the door "latched" as by causing the rotary latch units to each latchingly engage a separate one of the striker members when the door is in its closed position to securely latch the door, with the rotary latch units being mounted on the vehicle door at spaced latch locations that are adjacent the striker locations when the vehicle door is closed, and with the vehicle door having an interior and an exterior;

(c) latch operator means mounted on the vehicle door including interior handle means which is accessible from and operable from an interior side of the door and from an interior portion of the vehicle body, and exterior handle means which is accessible from and operable from an exterior side of the door and from the exterior of the body;

(d) the latch operator means additionally including first operator means carried by the vehicle door at a first operator location which is spaced from each of the latch locations and being drivingly connected to a selected one of the interior handle means and the exterior handle means, with the first operator means being movable at the first operator location between a first normal position and a first latch operating position;

(e) the latch operator means additionally including second operator means carried by the vehicle door and being drivingly connected to the other of the interior handle means and the exterior handle means;

(f) latch unit interconnection means for rotary latch units to effect concurrent unlatching of the rotary latch units from latching engagement with their associated striker members;

(g) connection means for establishing a driving connection between the first operator means and a selected one of the rotary latch units, and between the second operator means and the selected one of the rotary latch units, to normally enable the interior handle means and the exterior handle means of the latch operator means to "unlatch" the door as by releasing the rotary latch means from latchingly engaging the striker means and to thereby enable the vehicle door to be moved from its closed position, and being operable to disable at least one of the interior handle means and the exterior handle means of the latch operator means from "unlatching" the door;

(h) the connection means including first linkage means that extends along a first path from the first operator location to the latch location of the selected rotary latch unit, and with the first linkage means being drivingly connected to the first operator means at the first operator location and to the selected rotary latch means at its latch location for normally establishing a driving connection that extends along the first path for enabling the first operator means to unlatch the door as by causing the rotary latch means to withdraw latching engagement of the rotary latch means with the striker means and to thereby unlatch the door in response to movement of the first operator means between the first normal position and the first latch operator position;

(i) lock control means for selectively disabling the normal driving connection that is provided by the connection means between the latch operator means and the rotary latch means when the door is latched and to thereby "lock" the closed latched door against being unlatched, including first control means for selectively preventing the first linkage means from enabling the first operator means to unlatch the rotary latch means from latching engagement with the striker means;

(j) the first linkage means including at least a first pair of elongate linkage elements, with one of the linkage elements of the first pair of linkage elements being connected to the first operator means, and with the other of the linkage elements of the first pair of linkage elements being connected to the rotary latch means;

(k) the first control means including first paired lever means for normally drivingly connecting the linkage elements of the first pair of linkage elements, but also for selectively disrupting the normal driving connection between the linkage elements of the first pair of linkage elements to thereby selectively prevent the first linkage means from enabling the first operator means to unlatch the rotary latch means from latching engagement with the striker means, the first paired lever means having a first pair of pivotally mounted levers that are connected to the door for pivotal movement about a common axis of pivotal movement, with the levers of the first pair of pivotally mounted levers extending in overlying relationship, and with one of the levers of the first pair of pivotally mounted levers being connected to a first of the linkage elements of the first pair of linkage elements, and with the other of the levers of the first pair of pivotally mounted levers being connected to a second of the linkage elements of the first pair of linkage elements, and with the first control means additionally including first connection means coupled to both of the linkage elements of the first pair of linkage elements for movement between a connection position wherein the first connection means is operable to drivingly connect the linkage elements of the first pair of linkage elements for concurrent pivotal movement about said common axis so that movement of either one of the linkage elements of the first pair of linkage elements will result in corresponding movement of the other of the linkage elements of the first pair of linkage elements, and a disconnection position wherein the first connection means is operable to drivingly disconnect the linkage elements of the first pair of linkage elements for concurrent pivotal movement about said common axis so that movement of either one of the linkage elements will not result in corresponding movement of the other of the linkage elements of the first pair of linkage elements, and positioning means for effecting movement of the first connection means between its connection position and its disconnection position;

(1) the positioning means including:

(i) at least one control lever that is pivotally connected to the door and that extends in overlying relationship with at least one of the levers of the first pair of pivotally mounted levers;

(ii) a first control member located at a first control location spaced from the location of the control lever, and first elongate control linkage means for drivingly connecting the first control member to the control lever, with the control lever being operable, in response to movement of the first control member, to effect movement of the first connection means between its connection position and its disconnection position; and,

(iii) a second control member located at a second control location spaced from the location of the control lever, and second elongate control linkage means for drivingly connecting the second control member to the control lever, with the control lever being operable, in response to movement of the second control member, to effect movement of the first connection means between its connection position and its disconnection position;

(m) the first control member including a key operated lock that is mounted on the vehicle door and that is operable from the exterior of the door; and,

(n) the second control member including interior lock operator means mounted on the vehicle door and being accessible from the interior side of the door.

12. The door lock system of claim 11 wherein the interior lock operator means includes a sill button that is movable between locked and unlocked positions, and that is accessible from the interior side of the door for locking and unlocking the rotary latch.

13. The door lock system of claim 12 wherein the first linkage means is operable to connect the rotary latch means with the interior and exterior handle means, the key operated lock and the sill button such that, (1) when the door is "latched" but not "locked," either of the interior and exterior handle means may be operated to unlatch the door, (2) when the door is both "latched" and "locked," neither of the interior and exterior handle means may be operated to unlatch the door, and, (3) such locking and unlocking movements as are executed by the key operated lock will cause corresponding movements of the sill button between its locked and unlocked positions, whereby the positioning of the sill button is indicative of the "locked" and "unlocked" status of the door lock system.

14. The door lock system of claim 11 wherein the striker means includes a striker pin, and the rotary latch means includes a housing having a notch for reception of the striker pin when the vehicle door is closed, a pair of bolt members each having a recess formed therein for receiving the striker pin when the vehicle door is closed, means pivotally connecting the bolt members to the housing on opposite sides of the notch for movement between a first position wherein the bolt recesses are aligned with the notch to permit the striker pin to be moved into and out of the notch, and a second position wherein the bolt members extend into the notch from opposite sides thereof to retain the striker pin therein, a spring-biased pawl pivotally carried by the housing for engaging one of the bolt members to releasably retain both of the bolt members in the second position, operator means connected to the frame for releasing the pawl from retaining engagement with the one bolt member, means for pivoting the bolt members in unison between their latching and unlatching positions, and the bolt members being provided with stop formations configured to engage each other when the bolt members are in their latching positions to prevent further rotation of the bolt members in directions away from their unlatching positions, and to thereby positively prevent the bolt members from becoming inoperably jammed together.

15. A door lock system for a vehicle door that closes an access opening of a vehicle body, for securely latching the door in a closed position, and for locking the closed latched door, the system comprising:

(a) striker means including a plurality of strikers members for attachment to a vehicle body at a plurality of spaced striker locations near an access opening of the vehicle body that is closable by a door of the vehicle;

(b) rotary latch means including a plurality of rotary latch units for attachment to the vehicle door at a plurality of spaced latch locations for rendering the door "latched" as by latchingly engaging the striker means for securely latching the vehicle door in a closed position, with the latch locations each being adjacent a separate one of the striker locations when the vehicle door is closed;

(c) latch operator means for attachment to the vehicle door for movement relative to the door between a normal position and a latch operating position, including first operator means connected to the vehicle door at a first operator location which is spaced from the latch locations, with the first operator means being movable at the first operator location between a first normal position and a first latch operating position;

(d) latch unit interconnection means for connecting the rotary latch units to effect concurrent unlatching of the rotary latch units from latching engagement with their associated striker members;

(e) connection means for establishing a driving connection between the latch operator means and the rotary latch means to normally enable the latch operator means to "unlatch" the door as by releasing the rotary latch means from latchingly engaging the striker means and to thereby enable the vehicle door to be moved from its closed position, including first linkage means that extends along a first path from the first operator location to a selected one of the latch locations, and with the first linkage means being drivingly connected to the first operator means at the first operator location and to a selected one of the rotary latch means for normally establishing a driving connection that extends along the first path for enabling the first operator means to unlatch the door as by causing the rotary latch means to withdraw latching engagement of the rotary latch means with the striker means and to thereby unlatch the door in response to movement of the first operator means between the first normal position and the first latch operator position;

(f) lock control means for selectively disabling the normal driving connection that is provided by the connection means between the latch operator means and the rotary latch means when the door is latched and to thereby "lock" the closed latched door against being unlatched, including first control means for selectively preventing the first linkage means from enabling the first operator means to unlatch the rotary latch means from latching engagement with the striker means;

(g) the first linkage means including at least a first pair of elongate linkage elements, with one of the linkage elements of the first pair of linkage elements being connected to the first operator means, and with the other of the linkage elements of the first pair of linkage elements being connected to the rotary latch means;

(h) the first control means including first paired lever means for normally drivingly connecting the linkage elements of the first pair of linkage elements, but also for selectively disrupting the normal driving connection between the linkage elements of the first pair of linkage elements to thereby selectively prevent the first linkage means from enabling the first operator means to unlatch the rotary latch means from latching engagement with the striker means, the first paired lever means having a first pair of pivotally mounted levers that are connected to the door for pivotal movement about a common axis of pivotal movement, with the levers of the first pair of pivotally mounted levers extending in overlying relationship, and with one of the levers of the first pair of pivotally mounted levers being connected to a first of the linkage elements of the first pair of linkage elements, and with the other of the levers of the first pair of pivotally mounted levers being connected to a second of the linkage elements of the first pair of linkage elements, and with the first control means additionally including first connection means coupled to both of the linkage elements of the first pair of linkage elements for movement between a connection position wherein the first connection means is operable to drivingly connect the linkage elements of the first pair of linkage elements for concurrent pivotal movement about said common axis so that movement of either one of the linkage elements of the first pair of linkage elements will result in corresponding movement of the other of the linkage elements of the first pair of linkage elements, and a disconnection position wherein the first connection means is operable to drivingly disconnect the linkage elements of the first pair of linkage elements for concurrent pivotal movement about said common axis so that movement of either one of the linkage elements of the first pair of linkage elements will not result in corresponding movement of the other of the linkage elements of the first pair of linkage elements, and positioning means for effecting movement of the first connection means between its connection position and its disconnection position; and,

(i) the positioning means including at least one control lever that is pivotally connected to the door and that extends in overlying relationship with at least one of the levers of the first pair of pivotally mounted levers, a first control member located at a first control location spaced from the location of the control lever, and elongate control linkage means for drivingly connecting the first control member to the control lever, with the control lever being operable, in response to movement of the first control member, to effect movement of the first connection means between its connection position and its disconnection position.

16. The door lock system of claim 15 wherein the first control member is a key operated lock that is operable from an exterior side of the vehicle door.

17. The door lock system of claim 15 wherein the first control member is a sill button that is movable between locked and unlocked positions from an interior side of the vehicle door.

18. The door lock system of claim 15 wherein the positioning means additionally includes a second control member located at a second control location spaced from the location of the control lever, and second elongate control linkage means for drivingly connecting the second control member to the control lever with the control lever being operable, in response to movement of either of the first and second control members to effect movement of the first connection means between its connection position and its disconnection position.

19. The door lock system of claim 18 wherein the first control member is a key operated lock that is operable from an exterior side of the vehicle door.

20. The door lock system of claim 19 wherein the second control member is a sill button that is movable between locked and unlocked positions from an interior side of the vehicle door.

21. The door lock system of claim 15 wherein the first control means includes non-identically configured but alignable slot formations formed in the levers of the first pair of pivotally mounted levers, the first connection means includes connection pin means extending through the slot formations, and the control lever is operable to move the connection pin means relative to the slot formations between said connection position wherein the connection pin means serves to establish a driving connection that assures concurrent pivotal movement of the levers of the first pair of pivotally mounted levers about the common axis, and said disconnection position wherein the connection pin means provides no such driving connection between the levers of the first pair of pivotally mounted levers.

22. The door lock system of claim 15 wherein the first control means includes bracket means for mounting in close proximity to the latch location with the first pair of pivotally mounted levers and the control lever being pivotally connected to the bracket means for pivotal movement about said common axis.

23. The door lock system of claim 15 wherein the first latch operator means includes an internal door handle operating assembly that is operable from an internal side of the door to unlatch the door.

24. The door lock system of claim 15 wherein the latch operator means includes separate interior and exterior handle means connected to separate interior and exterior portions of the vehicle door, with each of the separate interior and exterior handle means having a separate actuator member that is movable relative to the door, with one of the separate actuator members comprising said first operator means, and with operating linkage means being provided for connecting the other of the separate actuator members to the rotary latch means for unlatching the rotary latch means in response to movement of said other of the separate actuator members.

25. The door lock system of claim 24 wherein said one of the actuator members that comprises said first operator means is the actuator member of the interior handle means.

26. The door lock system of claim 15 wherein each of the rotary latch units includes:

(a) housing means including structure defining a notch into which the body portion of the striker means is admitted as the door is closed;

(b) first and second bolt members pivotally supported by the housing means at spaced locations on opposite sides of the notch for movement between latching and unlatching positions;

(c) each of the bolt members being provided with:

(i) a recess formation facing generally toward the notch for receiving and engaging the body portion of the striker means when the body portion is admitted to the notch; and,

(ii) a cam surface which cooperates with the cam surface on the other of the bolt members for assisting to effect concurrent movement of the bolt members between their latching and unlatching positions;

(d) the recess formations being configured such that, when the bolt members are in their unlatching positions, the striker means may be moved into and out of the notch, and such that when the striker means is received in the recess formations with the bolt members in their latching positions, the striker means is retained in the notch by the bolt members;

(e) first biasing means biasing the bolt members toward their unlatching positions;

(f) one of the bolt members having at least one abutment formation thereon;

(g) a pawl movably carried on the housing means and having tooth means which is engageable with the abutment formation for preventing unlatching movement of the bolt members;

(h) second biasing means for biasing the tooth means into engagement with the abutment formation when the bolt members are moved to their latching positions; and,

(i) operating means for moving the pawl in opposition to the second biasing means to release the tooth means from engagement with the abutment formation to permit the bolt members to move under the influence of the first biasing means toward their unlatching positions to release the striker means; and,

(j) the bolt members being provided with stop formations configured to engage each other when the bolt members are in their latching positions to prevent further rotation of the bolt members in directions away from their unlatching positions, and to thereby positively prevent the bolt members from becoming inoperably jammed together.

27. The door lock system of claim 26 wherein the recess formations are configured to close toward the striker means as the striker means is moved into the notch and as the bolt members move concurrently toward their latching positions.

28. The door lock system of claim 27 wherein the recess formations are configured such that, as they close toward each other, they serve to center the striker means with respect to opposite sides of the notch, whereby, when the bolt members re in their latching positions, they hold the striker means at a predetermined centered location out of engagement with such portions of the housing structure as define the notch.

29. The door lock system of claim 27 wherein the housing means is formed as an assembly including a pair of side plates and three parallel-oriented bushings positioned at spaced locations between the side plates.

30. The door lock system of claim 29 wherein each of the bolt members is journaled on a separate one of the bushings, and the pawl is journaled on the remaining one of the bushings.

31. A rotary latch system for releasably latching a closure "closed" with respect to an associated structure, with the latching of the closure to the associated structure being effected at a plurality of spaced locations, and with the latch system being operable to concurrently release the latching of the closure at the plurality of locations in response to unlatching movement of either of a pair of operators, comprising:

(a) a plurality of striker means for mounting on a selected one of a closure structure and a closure-associated structure at spaced locations thereon;

(b) a plurality of rotary latch means for mounting on other of the structures for latchingly engaging the striker means at said spaced locations to releasably latch the closure closed;

(c) each of the rotary latch means including a latching mechanism and pivotally mounted release means for movement to a release position to release its latching mechanism from latching engagement with an associate are of the striker means;

(d) first and second release lever means pivotally connected to a selected one of the rotary latch means, with each of the first and second release lever means being individually pivotally movable into engagement with the release means of the selected rotary latch means to effect unlatching of the selected rotary latch means by moving the release means to its release position to release the latching engagement of the selected rotary latch means with its associated striker means;

(e) connection linkage means including at least one drive link drivingly connected to the release means of the other rotary latch means for moving the release means thereof to its release position to release latching engagement of the other rotary latch means from its associated striker means;

(f) the connection linkage means further including an operating arm that is pivotally connected to the selected rotary latch means and to the drive link for moving the drive link to unlatch the other rotary latch means in response to pivotal unlatching movement of either of the first and second release lever means into releasing engagement with the release means of the selected rotary latch;

(g) the rotary latch units other than the selected rotary latch unit each having a pawl that is pivotally movable to an unlatching position for effecting unlatching; and,

(h) the connection linkage means including separate drive links drivingly connected to the pawls of each of said other rotary latch units for pivoting the pawls thereof to their unlatching positions in response to unlatching movement of either of the first and second release lever means.

32. The rotary latch system of claim 31 wherein the connection linkage means additionally includes an operating arm that is pivotally connected to the selected rotary latch means and to the drive link means for moving the drive link means to unlatch the other rotary latch means in response to pivotal unlatching movement of either of the first and second release lever means into releasing engagement with the release means of the selected rotary latch.

33. The rotary latch system of claim 32 wherein the first and second release lever means and the operating arm are connected to the selected rotary latch means for pivoting about a common axis, and the operating arm carries separate formation means for extending into paths of movement followed by the first and second release levers, respectively, in executing pivotal unlatching movement to effect unlatching movement of the operating arm about the common axis in response to unlatching movement of either of the first and second release levers about the common axis.