Conventional locker locks employ a locking bolt that interferes with a frame member of the locker to prevent the locker door from being opened. When the locker lock is unlocked, for example, by turning a dial or dials to an authorized position or sequence of positions, or by insertion and rotation of a proper key, the locking bolt is disengaged or withdrawn from the locker frame member, allowing the locker door to be opened. The locker lock may, for example, utilize a horizontally moving locking bolt, which may be retracted into a lock body and out of engagement with the frame member when the lock is unlocked.
The conventional retractable locking bolt for a “single point” locker lock (named for the single point of locking engagement between the locking bolt and the locker frame) is typically spring biased into an extended position and is not secured or locked in this extended position, and therefore may potentially be pushed into the lock without proper operation of the locking mechanism (e.g., without dialing an authorized combination or using a proper key). As a result, the locker may be susceptible to unauthorized entry, for example, by bumping, jamming, or jimmying the locking bolt into the lock and out of engagement with the locker frame. While the use of additional locking bolts (a “multiple point” locker lock) may improve locker security, such an arrangement may be both complex and more expensive in institutional settings, such as a school.
The present application describes locking arrangements which may be provided for securing a first structure (such as a locker door) to a second structure (such as a locker enclosure), in which a locking member is secured (or dead-locked) in a locking condition, thereby impeding unauthorized retraction or disengagement of the locking member from a frame member of the second structure. According to an inventive aspect of the present application, a slideable locking bolt may be utilized to secure a rotary locking member in a locking position, and to selectively permit rotation of the rotary locking member from the locking position to a releasing position. According to another inventive aspect, a lock may include an electrically operable mechanism configured to move the locking bolt in response to an electrical signal supplied to the electrically operable mechanism to permit rotation of the locking member from the locking position to the releasing position.
Accordingly, in one embodiment, a lock includes a rotary locking member, a locking bolt, and an electrically operable mechanism. The rotary locking member is rotatable about a first axis between a locking position and a releasing position. The locking bolt is configured to hold the rotary locking member in the locking position when the locking bolt is in a first position. The electrically operable mechanism is configured to move the locking bolt in a direction parallel to the first axis from the first position to a second position in response to an electrical signal supplied to the electrically operable mechanism. Movement of the locking bolt to the second position allows the rotary locking member to rotate from the locking position to the releasing position.
Features and advantages of the invention will become apparent from the following detailed description made with reference to the accompanying drawings, wherein:
This Detailed Description merely describes embodiments of the invention and is not intended to limit the scope of the claims in any way. Indeed, the invention as claimed is broader than and unlimited by the preferred embodiments, and the terms used have their full ordinary meaning. For example, while the embodiments described herein relate to locking arrangements for a locker lock, the inventive features may be utilized in many different types of locks for doors, containers, cabinets, or other such structures, and with many different types of locking interfaces, including, for example, key operated, single dial combination, multiple dial combination, and electrically operable locking interfaces.
The present application describes locking arrangements which may be provided for securing a first structure (such as, for example, a locker door) to a second structure (such as, for example, a locker enclosure), in which a locking member is secured (or dead-locked) in a locking condition thereby impeding unauthorized retraction or disengagement of the locking member from a frame member or other obstruction of the second structure. According to an inventive aspect of the present application, the locking member may rotate between locking and releasing positions (as compared to, for example, a sliding locking member) to deter tampering with the locking member. According to another inventive aspect, a slidable locking bolt may be utilized to secure a rotary locking member in a locking position. Because this locking bolt does not directly engage the frame member of the second structure, it may be at least partially shielded, surrounded or enclosed, for example, by a lock housing, to prevent unauthorized manipulation of or tampering with the locking bolt in an effort to defeat the lock assembly.
The present application contemplates a locking arrangement that is configured to impede or prevent movement of a first structure out of locking engagement with a second structure when the locking arrangement is in a locked condition. While many different locking arrangements may be used to secure the locking member in the locked condition, according to one inventive aspect of the present application, a locker lock includes a locking member that rotates from a frame member engaging or blocking position to a frame member disengaging or releasing position when the locking arrangement is moved from a locked condition to an unlocked condition. By using a rotating or rotary locking member to selectively retain a frame member of a structure to be locked, unauthorized tampering (such as, for example, forced retraction of a sliding locking member, common in conventional locker locks) may be inhibited. Tampering with the locking member may further be inhibited by configuring the locking arrangement such that rotation of the locking member is prevented when the locking arrangement is in the locked condition, thereby providing a dead-locked condition, in which obstructed access to the locking member by the user (for example, by an outer surface of the locker door) is not relied on to prevent unauthorized access. When the locking arrangement is moved to the unlocked condition, the locking member is permitted to rotate, for example, by a spring loaded mechanism or by manual operation by the user, out of blocking engagement with the frame member, allowing the first structure to move with respect to the second structure.
The present application also contemplates a lock (for example, a cabinet lock or locker lock) configured to engage and disengage from a frame member through movement in a vertical direction with respect to the frame member. In some applications, a lockable structure, such as a storage locker, may be more easily manufactured with more exacting vertical dimensional tolerances than with more exacting horizontal dimensional tolerances. By providing a lock with a locking member that moves vertically with respect to a frame member for vertical disengagement from and engagement with the frame member, the lockable structure may be made more efficiently. While a locking member may be vertically slidable for disengagement from and engagement with the frame member, in another embodiment, as illustrated in the present application, a locking member may be pivotable or rotatable to vertically engage with and disengage from the frame member.
While the specification and drawings of the present application describe embodiments in which a lock is assembled with a door (for example, a locker door) for locking engagement with an enclosure or frame, these same inventive features may be applied to a locking arrangement in which a lock is assembled with a frame or enclosure for locking engagement with a door.
When the locking mechanism 18 is moved to the unlocked condition, as shown in
While many different types of locking bolt movement may be used to selectively permit rotational movement of the rotary locking member 15, including, for example, rotating, pivoting, and axial or lateral sliding movement, in the illustrated embodiment, the locking bolt is configured to slide in a direction parallel to the rotary locking member axis A, providing for a relatively compact locking arrangement.
The schematically illustrated locking arrangement 10 of
As shown in
While providing a lock with a fully enclosed sliding locking bolt may prevent unauthorized access to a locked enclosure (e.g., a locker or cabinet), for example, by insertion of lock picking tools through a seam or opening in the locked door, in some applications, it may be desirable to provide access to the locking bolt from outside the lock housing and from an inner side of the locked door. For example, where a lock on an unlocked door has been inadvertently returned to the locked condition, it may be inconvenient to manipulate the lock interface (e.g., by dialing an authorized combination code) to release the locking member in order to close the door. By providing a lock with operable access to the locking bolt, the lock of the opened locker may be returned to an unlocked condition without having to properly manipulate the lock interface. As another example, where a person has been closed inside a locker or other locking enclosure, operable access to the locking bolt from inside the enclosure may be a useful safety feature, allowing the trapped individual to release himself or herself.
While many different configurations may be utilized to provide operable access to the locking bolt from inside the locked door, in one embodiment, a projection may extend from the locking bolt through an opening in the lock housing, the projection being accessible from outside the housing to slide the locking bolt from the locked or extended position to the unlocked or retracted position.
The rotary locking member 25 may be provided in many different shapes and orientations. According to an inventive aspect of the present application, a rotary locking member may include a frame obstructing portion configured to block movement of the locked door with respect to the locker frame, and a lock resetting portion configured to engage a frame member as the locker door is closed, causing the rotary locking member to be rotated back to the locking position when the door is closed. These portions may be joined to form an arcuate, U-shaped, or two-pronged locking member configured to retain a frame member between the two portions when the locker door is closed. As illustrated, for example, in
As shown most clearly in
As shown in
When a door using the illustrated locking arrangement 20 is moved back to a closed condition, the locking member 25 and the shaft 24 of the illustrated embodiment are rotated back to the locking position (shown, for example, in
The inventive features of the locking arrangement described herein may be applied to many different types of locks, including, for example, key operated locks, combination locks, and electrically operated locks.
While many different locking mechanisms may be used to move a locking bolt to allow rotation of a shaft and locking member, in the illustrated embodiment, as shown in the exploded view of
The embodiments of
In another embodiment, a lock may include an electrically operable mechanism configured to move a locking bolt (e.g., to allow rotation of a shaft and locking member) in response to an electrical signal supplied to the electrically operable mechanism. The electrical signal may be supplied, for example, by an electronic keypad, biometric sensor, wireless transceiver, or other such electronic lock interface connected with the electrically operable mechanism and configured to deliver the electrical signal in response to the receipt of an authorized data signal.
Many different electrically operable mechanisms may be utilized to move a locking bolt, including, for example, an electrical actuator, electrical switch, DC motor (linear or screw drive), shape memory alloy device (e.g., a device using MUSCLE WIRES® or NANOMUSCLE® shape memory alloys), or solenoid (linear or rotary). In one embodiment, a electrically operable mechanism for a lock includes a pull-type linear solenoid having a body and a plunger movable with respect to the body in response to receipt of an electrical signal. One of the body and the plunger may be affixed (directly or indirectly) to the lock housing, with the other of the body and the plunger being affixed (directly or indirectly) to the locking bolt, such that when an electrical signal is supplied to the solenoid, the locking bolt is moved linearly with respect to the lock housing and out of engagement with a rotary locking member to allow rotation of the rotary locking member from a locking position to a releasing position.
When an electrical signal is supplied to the solenoid 270 (for example, in response to receipt of an authorized data signal by the electronic lock interface 280), the frame member 271 retracts over the fixed plunger 275 to retract the locking bolt 227 against a bolt biasing member or spring (shown schematically at 222 in
The locking bolt may be moved by the solenoid 270 (or any other electrical or mechanical mechanism for moving the locking bolt 227) to fully disengage from a flatted portion of the shaft 224 to allow rotation of the rotary locking member 225, as shown in the embodiment of
When the rotary locking member 225 is re-engaged with the frame member X (for example, by pivoting a locker door back to a closed condition), force applied to the lock (e.g., by pushing on the locker door) causes the locking member 225 and shaft 224 to rotate back to the locking position (see
Many different types of solenoids may be utilized to operate a locking bolt. In one embodiment, an electrically operated lock assembly includes a LEDEX® linear open frame solenoid (model B17). While the illustrated lock assembly 220 is shown with the plunger 275 fixed to the lock housing 221 and the frame member 271 movable to move the locking bolt 227, in another embodiment (not shown), a lock assembly may be provided with a solenoid having a frame member fixed to the lock housing and a plunger movable to move the locking bolt. Further, while the illustrated lock assembly 220 includes a pull-type linear solenoid 270 for pulling the locking bolt 227 out of engagement with the rotary locking member 225, in another embodiment (not shown), a lock assembly may include a push-type solenoid configured to push a locking bolt out of engagement with a rotary locking member.
While various inventive aspects, concepts and features of the inventions may be described and illustrated herein as embodied in combination in the exemplary embodiments, these various aspects, concepts and features may be used in many alternative embodiments, either individually or in various combinations and sub-combinations thereof. Unless expressly excluded herein all such combinations and sub-combinations are intended to be within the scope of the present inventions. Still further, while various alternative embodiments as to the various aspects, concepts and features of the inventions—such as alternative materials, structures, configurations, methods, circuits, devices and components, software, hardware, control logic, alternatives as to form, fit and function, and so on—may be described herein, such descriptions are not intended to be a complete or exhaustive list of available alternative embodiments, whether presently known or later developed. Those skilled in the art may readily adopt one or more of the inventive aspects, concepts or features into additional embodiments and uses within the scope of the present inventions even if such embodiments are not expressly disclosed herein. Additionally, even though some features, concepts or aspects of the inventions may be described herein as being a preferred arrangement or method, such description is not intended to suggest that such feature is required or necessary unless expressly so stated. Still further, exemplary or representative values and ranges may be included to assist in understanding the present disclosure; however, such values and ranges are not to be construed in a limiting sense and are intended to be critical values or ranges only if so expressly stated. Moreover, while various aspects, features and concepts may be expressly identified herein as being inventive or forming part of an invention, such identification is not intended to be exclusive, but rather there may be inventive aspects, concepts and features that are fully described herein without being expressly identified as such or as part of a specific invention. Descriptions of exemplary methods or processes are not limited to inclusion of all steps as being required in all cases, nor is the order that the steps are presented to be construed as required or necessary unless expressly so stated.
This application claims the benefit of U.S. Provisional Patent Application Ser. No. 61/053,243, entitled “LOCK ASSEMBLY WITH ROTARY LOCKING MEMBER” and filed May 15, 2008. This application is also a continuation-in-part of co-pending U.S. application Ser. No. 11/774,038, entitled “LOCKER LOCK” and filed Jul. 6, 2007, which claims the benefit of U.S. Provisional Patent Application Ser. No. 60/904,243, entitled “LOCKER LOCK” and filed Mar. 1, 2007. The entire contents of all of the above applications are incorporated herein by reference, to the extent that they are not conflicting with the present application.
Number | Date | Country | |
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61053243 | May 2008 | US |