Patent Grant
7004517
1. Field of Invention
The present invention relates to the field of latch assemblies.
2. Brief Description of the Related Art
Latch assemblies are relied on in many applications for securing items, such as panels, doors, and doorframes together. For example, containers, cabinets, closets, compartments and the like may be secured with a latch. An important use for latches is in the automotive field, where there is a desire and need to access automotive compartments, such as, for example, the trunk or passenger compartments of vehicles, as well as interior compartments such as a glove box. Various latches for panel closures have been employed where one of the panels such as a swinging door or the like is to be fastened or secured to a stationary panel, doorframe, or compartment body. Although many latch assemblies are known in the prior art, none are seen to teach or suggest the unique features of the present invention or to achieve the advantages of the present invention.
The present invention relates to a latching system for securing two panels together such as those of storage structures in which an enclosure is secured by means of a door or panel which will remain in a closed position until released. An example of a use of the present latching system is in connection with automobile glove boxes or other compartments which are to be secured for storage of items therein.
Referring to
The latch 10 includes a latch housing 12, a pawl 14, a locking member 16, and means for selectively moving the locking member in and out of engagement with the pawl. In the illustrated embodiment, a solenoid 18 serves as the means for selectively moving the locking member in and out of engagement with the pawl.
In the illustrated example, the latch 10 is shown being used for securing the lid 20 of an automotive glove box 22 in the closed position. However, the latch 10 is generally applicable wherever one or more closure members need to be secured in a certain position. Further, in the illustrated embodiment the latch 10 is mounted to the frame 24 surrounding the glove box opening 26 while the keeper 28 is mounted to the lid 20 of the glove box 22. Of course, it is possible to arrange for the latch 10 to be mounted to the lid 20 of the glove box while the keeper 28 is in a fixed position relative to the glove box 22 itself without departing from the spirit and scope of the present invention. In addition, the latch 10 may be mounted in any orientation depending upon the particular application. In the illustrated example, the front of the latch housing 12 faces toward the lid 20 of the glove box, and the rear of the latch housing 12 faces toward the back wall 30 of the glove box.
The housing 12 is provided with a body portion 32 having a hook-like member 34 projecting from the bottom thereof. Hook-like as used herein refers to any member that has a crook, curve, or bend to thereby catch on another member. The hook-like member 34 extends downward and then forward from the bottom of the housing body portion 32 such that the tip 36 of the member 34 points toward the lid 20 of the glove compartment 22. A first slot 38 is provided within the hook-like member 34 and extends through a portion of the housing body 32. The housing body 32 has a cavity 40 for receiving and holding the solenoid 18.
The latch assembly 10 also includes a pawl 14 shown pivotally connected to the latch housing 12 with suitable attachment means such as the pawl pivot members or spindles 42,44 which are provided extending outwardly from the pawl 14 at opposite sides thereof. The pivot members 42, 44 can also be provided as a single pivot member extending through the pawl 14. A pair of larger diameter base portions 46 are provided at the base of the pawl pivot members 42,44. The base portions 46 prevent excessive lateral play of the pawl 14 once the pawl is installed to the housing 12. The pawl 14 is installed onto the housing 12 by snap-fit placement of the pawl pivot members 42,44 into the pawl pivot recesses 48 (only one being shown in
As shown in
A pawl torsion spring 60 is installed on the pawl 14 with the coiled portions 62 and 64 surrounding the base portions 46 of the pawl pivot members 42 and 44, respectively. The cross bar 66 of the torsion spring 60 engages the notch 68 in the arm portion 58. The torsion spring 60 also has tail portions 70,72 and arms 74,76. The vertical spring arms 74,76 extend from the respective coil portions 62 and 64 of the torsion spring 60 and connect to cross bar 66. The pawl arm 58 is positioned intermediate the spring arms 74 and 76. The pawl 14 is installed with the notch 68 facing toward the rear of the housing 12. The projection 54 has a flat surface 78 that extends roughly in a radial direction relative to the pivot axis of the pawl 14.
The tails 70, 72 of the torsion spring 60 fit into and lie along the grooves 80, 82, respectively, when the pawl 14 is snap-fitted to the housing 12. With the tails 70, 72 of the torsion spring 60 so positioned, the cross bar 66 of the torsion spring 60 exerts a force on the arm portion 58 of the pawl 14 that biases the pawl 14 toward the open or unlatched configuration.
The solenoid 18 is supported in a frame 84 that in turn fits in the cavity 40 of the housing 12. The locking member 16 is in essence a continuation of the shaft of the solenoid 18. The locking member 16 may be integral with the shaft of the solenoid 18, or the locking member 16 may be an extension attached to the shaft of the solenoid 18. The frame 84 is provided with an opening to allow the locking member 16, or the shaft of the solenoid 18 as the case may be, to pass through the frame 84. The locking member 16 is provided with a flange 86. A spring 88 is provided intermediate the flange 86 and the body portion or coils 90 of the solenoid 18. The spring may be in direct contact with the solenoid body 90 or it may be in contact with the frame 84, depending upon the size of the opening in the frame 84. The spring 88 biases the locking member 16 into the extended position. When the locking member 16 is in the extended position and the pawl 14 is in the closed or latched position, the locking member 16 is positioned behind the lug 54 and prevents the pawl 14 from rotating to the open or unlatched position.
The latch assembly 10 is actuated by energizing the solenoid 18. The solenoid 18 may be energized using a remotely located switch (not shown). When the solenoid 18 is energized, the locking member 16 is retracted such that the locking member 16 is moved out of engagement with the projection or lug 54 thereby freeing up the pawl 14 for pivoting. The bias provided by the pawl torsion spring 60 rotates the pawl 14 from its latched position, where the keeper 28 is cooperatively captured by the pawl slot 56 and the hook-shaped flange 34, and allows the pawl 14 to rotate in the counterclockwise direction as viewed in
Suitable mounting means are provided to retain the latch assembly 10 on a panel or mounting surface. For example, installation of the latch assembly 10 to a panel may be accomplished with screws or pins that engage the holes 94 and 96 for fastening of the latch assembly to a panel, such as for example, the frame 24 of the glove box 22. Additionally, in the illustrated example a lateral tab 98 is provided on each side of the hook-like member 34. The lateral tabs 98 engage corresponding notches 99 formed in the glove box 22 to more securely hold the latch 10 in place.
When the door 20 is being closed, the opening of the pawl slot 56 faces toward the keeper 28 and is unobstructed by the hook-like member 34. As the door 20 is slammed shut, the keeper 28 is received in the slot 56 and impacts the pawl 14 causing the clockwise rotation of the pawl 14 to the closed configuration shown in
In addition to the solenoid 18, the latch 10 may be provided with a handle to manually operate the latch in the event the solenoid fails or there is no power to operate the solenoid. As an alternative or in addition to the handle, a mechanical key-operated lock plug can be incorporated into the design whereby rotation of the lock plug pushes the locking member 16, for example using some form of cam arrangement, out of engagement with the lug 54 to thereby allow the glove box to be opened in the event of an electrical power failure.
Another embodiment of the latch in accordance with the present invention is illustrated in
The latch 100 includes a latch housing 102, a pawl 104, a locking member 106, and means for selectively moving the locking member in and out of engagement with the pawl. In the illustrated embodiment, a solenoid assembly 108 serves as the means for selectively moving the locking member in and out of engagement with the pawl.
In the illustrated example, the latch 100 is shown being used for securing the lid 200 of an automotive glove box 202 in the closed position. However, the latch 100 is generally applicable wherever one or more closure members need to be secured in a certain position. Further, in the illustrated embodiment the latch 100 is mounted to the frame 204 surrounding the glove box opening 206 while the keeper 208 is mounted to the lid 200 of the glove box 202. Of course, it is possible to arrange for the latch 100 to be mounted to the lid 200 of the glove box while the keeper 208 is in a fixed position relative to the glove box 202 itself without departing from the spirit and scope of the present invention. In addition, the latch 100 may be mounted in any orientation depending upon the particular application. In the illustrated example, the front of the latch housing 102 faces toward the lid 200 of the glove box, and the rear of the latch housing 102 faces toward the back wall of the glove box 202.
The housing 102 is provided with a body portion 110 and has a hook-like member 112 projecting therefrom. Hook-like as used herein refers to any member that has a crook, curve, or bend to thereby catch on another member. In the illustrated example, once the latch 100 is installed to the glove box 202, the hook-like member 112 extends downward and then forward from the lower end of the housing body portion 1110 such that the tip 114 of the hook-like member 112 points toward the lid 200 of the glove compartment 202. A first slot 116 is provided within the hook-like member 112 and extends through a portion of the housing body 110. The housing body 110 has a cavity 118 for receiving and holding the solenoid assembly 108.
The cavity 118 is positioned relative to the hook-like member 112 such that the longitudinal axis of the shaft or plunger 120 of the solenoid 122 is directed in a direction that is substantially perpendicular to the axis of rotation of the pawl 104. In the illustrated embodiment, the longitudinal axis of the shaft or plunger 120 of the solenoid 122 essentially lies in the plane of rotation of the pawl 104. The plane of rotation of the pawl 104 is defined as a plane to which the axis of rotation of the pawl 104 is perpendicular and that passes through the center of the pawl 104. This geometric arrangement allows only a single fastener passing through the hole 124 to suffice for securely attaching the housing 102 to a door or doorframe in cooperation with the lateral tabs 126. Minimizing the number of fasteners required for installation reduces the overall cost to manufacturers of using the latch 100 in their products. Furthermore, the geometric arrangement of the latch housing 102 results in savings in materials because this arrangement yields a more compact latch housing,
A resilient snap leg 128 is provided integrally with a wall of the cavity 118. The snap leg 128 is used to secure the solenoid assembly 108 within the cavity or solenoid housing 118, thus obviating the need for fasteners or glue for this purpose. The snap leg 128 has a sloped surface or ramp 130 that terminates in a projecting ridge 132. A substantially flat surface 134 extends from the ridge 132 toward the outer surface of the wall of the cavity 118 to which the snap leg 128 is attached. The surface 134 extends from the ridge 132 in a direction substantially parallel to the bottom 117 of the cavity 118. The snap leg 128 obviates the need for glue or fasteners in securing the solenoid assembly 108 to the housing 102. The solenoid assembly 108 is installed simply by pressing or pushing the solenoid assembly 108 into the cavity 118. As the solenoid assembly 108 is being pushed into the cavity 118, the solenoid frame 136 acts on the ramp 130 to push the snap leg 128 out of the way of the solenoid assembly 108. Once the solenoid assembly 108 is properly seated against the bottom of the cavity 118, the solenoid frame 136 clears the ridge 132 allowing the snap leg 128 to snap back to its original position. Once the snap leg 128 is in its original position, a portion of the solenoid frame 136 is captured between the surface 134 and the bottom 117 of the cavity 118 thus securing the solenoid assembly 108 within the cavity 118. The elimination of the need for glue and/or fasteners for securing the solenoid assembly 108 to the housing 102 results in further cost savings.
The latch assembly 100 also includes a pawl 104 shown pivotally connected to the latch housing 102 with suitable attachment means such as the pawl pivot members or spindles 138, 140 which are provided extending outwardly from the pawl 104 at opposite sides thereof. The pivot members 138, 140 can also be provided as a single pivot member extending through the pawl 104. A pair of larger diameter base portions 142 and 144 are provided at the base of the pawl pivot members 138 and 140 respectively. The base portions 142 and 144 prevent excessive lateral play of the pawl 104 once the pawl is installed to the housing 102. The pawl 104 is installed onto the housing 102 by snap-fit placement of the pawl pivot members 138 and 140 into the pawl pivot recesses 146 and 148, respectively, disposed on opposite sides of the first slot 116. A pair of guide slots 150 and 152 are provided on either side of the slot 116. The guide slots 150 and 152 lead to the recesses 146 and 148, respectively. The pair of guide slots 150 and 152 form ramped surfaces which spread farther apart from one another with increasing distance from the recesses 146 and 148. The guide slots 150, 152 guide the pawl pivot members 138, 140 in the direction of the pawl pivot recesses 146 and 148 during the snap-fitting process.
The pawl 104 is has a body portion 154 with the pair of pawl pivot members 138,140 extending therefrom. The pawl 104 has a lug or projection 156 and is provided with a pawl slot 158 to retain the keeper member 208 when the pawl 104 is in the latched position. In the illustrated example, the keeper member is attached to the lid of the glove box at a position such that when the swinging lid or door 200 is closed, the keeper member 208 will be positioned or caught in the crook or bend of the hook-like member 112. The pawl 104 is also provided with an arm portion 160 extending from the pawl body 154.
A pawl torsion spring 162 is installed on the pawl 104 with the coiled portions 164 and 166 surrounding the base portions 142, 144 of the pawl pivot members 138 and 140, respectively. The cross bar 168 of the torsion spring 162 engages the notch 170 in the arm portion 160. In the illustrated example the notch 170 is enlarged to more positively retain the cross bar 168 in position relative to the pawl 104. The torsion spring 162 also has tail portions 172,174 and arms 176,178. The vertical spring arms 176,178 extend from the respective coiled portions 164 and 166 of the torsion spring 162 and connect to cross bar 168. The pawl arm 160 is positioned intermediate the spring arms 176 and 178. When the pawl 104 is installed in the housing 102, the notch 170 is located further to the rear relative to the pawl slot 158. The projection or lug 156 has a flat surface 180 that extends roughly in a radial direction relative to the pivot axis of the pawl 104.
The tails 172, 174 of the torsion spring 162 fit into and lie along the grooves 182, 184, respectively, when the pawl 104 is snap-fitted to the housing 102. With the tails 172, 174 of the torsion spring 162 positioned in the grooves 182,184, the cross bar 168 of the torsion spring 162 exerts a force on the arm portion 160 of the pawl 104 that biases the pawl 104 toward the open or unlatched configuration.
The solenoid 122 is supported in a frame 136 that in turn fits in the cavity 118 of the housing 102. The locking member 106 is in essence a continuation of the shaft 120 of the solenoid 122. The locking member 106 may be integral with the shaft 120 of the solenoid 122, or the locking member 106 may be an extension attached to the shaft 120 of the solenoid 122. The frame 136 is provided with an opening to allow the locking member 106, or the shaft 120 of the solenoid 122 as the case may be, to pass through the frame 136. The locking member 106 is provided with a flange 186. A spring 188 is provided intermediate the flange 186 and the body portion or coils 190 of the solenoid 122. The spring may be in direct contact with the solenoid body 190 or it may be in contact with the frame 136, depending upon the size of the opening in the frame 136. The spring 188 biases the locking member 106 into the extended position. When the locking member 106 is In the extended position and the pawl 104 is in the closed or latched position, the locking member 106 is positioned behind the lug 156 and prevents the pawl 104 from rotating to the open or unlatched position.
The latch assembly 100 is actuated by energizing the solenoid 122. The solenoid 122 may be energized using a remotely located switch (not shown). When the solenoid 122 is energized, the locking member 106 is retracted such that the locking member 106 is moved out of engagement with the projection or lug 156 thereby freeing up the pawl 104 for pivoting. The bias provided by the pawl torsion spring 162 rotates the pawl 104 from its latched position where the keeper 208 is cooperatively captured by the pawl slot 158 and the hook-shaped flange 112, and allows the pawl 104 to rotate in the clockwise direction as viewed in
Suitable mounting means are provided to retain the latch assembly 100 on a panel or mounting surface. For example, installation of the latch assembly 100 to a panel may be accomplished with a screw or pin that engages the hole 124 for fastening of the latch assembly to a panel, such as for example, the frame 204 of the glove box 202. Additionally, in the illustrated example a lateral tab 126 is provided on each side of the hook-like member 112. The lateral tabs 126 engage corresponding notches or openings 210 formed in the glove box 202 to more securely hold the latch 100 in place.
When the door 220 is being closed, the opening of the pawl slot 158 faces toward the keeper 208 and is unobstructed by the hook-like member 112. As the door 200 is slammed shut, the keeper 208 is received in the slot 158 and impacts the pawl 104 causing the counterclockwise rotation of the pawl 104 (as viewed in
In addition to the solenoid 122, the latch 100 may be provided with a handle to manually operate the latch in the event the solenoid fails or there is no power to operate the solenoid. As an alternative or in addition to the handle, a mechanical key-operated lock plug can be incorporated into the design whereby rotation of the lock plug pushes the locking member 106, for example using some form of cam arrangement, out of engagement with the lug 156 to thereby allow the glove box to be opened in the event of an electrical power failure.
Another embodiment of the latch in accordance with the present invention is illustrated in
Referring to
The housing 1104 has a lock plug socket 1118 having a generally cylindrical bore for receipt of a lock plug 1120. The lock plug socket 1118 is especially adapted to receive the lock plug 1120. The lock plug 1120 has an end portion which has projections 1122 and cavities 1124. The lock plug 1120 also has retractable projections 1126 which retract upon the insertion of an appropriate key into the keyhole 1128 to thereby allow rotation of the lock plug 1120 within the socket 1118.
Also supported within the socket 1118 is a cam plug 1130. The cam plug 1130 has projections 1132 and 1134 that mate with the projections 1122 and cavities 1124 such that the lock plug 1120 and the cam plug 1130 rotate as a unit. The end of the cam plug 1130, located distally from the lock plug 1120 is provided with an eccentric cam pin 1136.
A hook-like structure 1138 projects from the top of the housing 1104. An illustrative example of the application of the latch assembly 1100 is for latching the door of a vehicle's glove compartment. References to top, bottom, front, rear, left side and right side as used herein are applied by reference to the vehicle in which the latch assembly 1100 is installed. For example, the front of the latch housing faces toward the front of the vehicle when the latch housing 1104 is installed to the door of the vehicle's glove compartment and the door of the glove compartment is closed. The rear of the latch housing faces toward the rear of the vehicle when the latch housing 1104 is installed to the door of the vehicle's glove compartment and the door of the glove compartment is closed, the bottom of the latch housing faces toward the floor of the vehicle's passenger compartment when the latch housing 1104 is installed to the door of the vehicle's glove compartment and the door of the glove compartment is closed. The top of the latch housing faces toward the roof of the vehicle's passenger compartment when the latch housing 1104 is installed to the door of the vehicle's glove compartment and the door of the glove compartment is closed and so forth. Hook-like as used herein refers to any member that has a crook, curve, or bend to thereby catch on another member. The hook-like member 1138 extends upward and then forward from the top of the housing 1104 such that the tip 1140 of the hook-like member 1138 points toward the front of the vehicle when the latch housing 1104 is installed to the door of the vehicle's glove compartment and the door of the glove compartment is closed. A first slot 1144 is provided within the hook-like member 138 and extends through a portion of the housing body 1142 (as shown in
The catch beam 1150 has an elongated slot 1152 in its bulbous end which is engaged by the cam pin 1136. Through the interaction of the cam pin 1136 and the slot 1152, rotation of the lock plug 1120 causes the linear translational motion of the catch beam 1150 to either the left or the right.
The latch assembly 1100 also includes a pawl 1154 shown pivotally connected to the latch housing 1104 with suitable attachment means such as the pawl pivot members 1158 which are provided extending outwardly from the pawl 1154 at opposite sides thereof. The pawl 1154 is installed onto the housing 1104 by snap-fit placement of the pawl pivot members 1158 into the pawl pivot recesses 1160 disposed in the housing 1104. A pair of guide slots 1162 is provided on the housing leading from the edge of the housing to the pawl pivot recesses 1160 for guiding the pawl pivot members 1158, in the direction of the pawl pivot recesses 1160.
The pawl 1154 has a locking lug 1164 and is provided with a pawl slot 1156 to retain a keeper rod (not shown). Preferably the keeper rod is attached to a stationary panel, doorframe or compartment (not shown) at a position such that as the swinging panel or door, to which the latch assembly 1100 is attached, is rotated to the closed position, the keeper rod will pass below the forward pointing portion of the hook-shaped structure 1138 and come into engagement with the pawl 1154.
A pawl torsional spring 1166 is installed on the pawl 1154 with the coiled portions surrounding the pawl pivot members 1158. A loop of the torsion spring 1166 engages the notch 1168 near the top of the pawl 1154. The torsion spring 1166 biases the pawl 1154 toward the open position shown in
The handle 1102 has an actuation arm 1178 extending forward therefrom. Extending from the housing body 1142 is a spring retaining socket 1180 which is aligned with spring retaining structure 1182 of the handle 1102. A handle spring 1184 is cooperatively held by the spring retaining structure 1182 and the socket 1180. The spring 1184 provides a bias when the handle 1102 is lifted so that after actuation takes place the handle 1102 is returned to its original position by the force of the compression spring 1184.
The actuation arm 1178 of the paddle 1102 passes through an opening 1204 in the housing 1104 and is provided to engage the catch beam 1150 at the engaging pad 1186. The free end of the living spring 1176 is provided with a bulge 1188 which alternatively engages the slots 1190 and 1192 to provide a detent feature which stabilizes the catch beam 1150 in the locked and unlocked positions, respectively.
The catch beam 1150 is moved between the locked and unlocked positions by the selective rotation of the lock plug 1120 by a user with a key. As shown in
The latch assembly 1100 is actuated by lifting the handle 1102 in an upward direction. The actuation arm 1178 of the handle 1102 engages the pad 1186 of the catch beam 1150 to pivotally move the catch beam 1150 downward and move the catch plate 1174 out of engagement with the pawl lug 1164 thereby freeing up the pawl 1154 for pivoting. The bias provided by the pawl torsion spring 1166 rotates the pawl 1154 from its closed position, where the keeper rod is cooperatively captured by the pawl slot 1156 and the hook-shaped structure 1138, to its open position shown in
Suitable mounting means are provided to retain the latch assembly 1100 on a panel or mounting surface. For example, installation of the latch assembly 1100 to a panel may be accomplished with screws or pins which pass through holes 1196 for fastening of the latch assembly to a panel, such as for example, a glove box door 1198 of an automobile.
The latch assembly 1100 also has some additional features which enhance its resistance to tampering. First, the pawl 1154 and the hook-like structure 1138 are off-set to one side of the handle 1102 such that if the handle is broken off by a thief, a screw driver or other tool inserted through the access holes for the handle mounts or the actuating arm cannot reach the pawl 1154. Also, a lug 1200 is provided in the housing that engages a rib 1202 (
Another embodiment of the latch in accordance with the present invention is illustrated in
Referring to
As shown in
As best shown in
Each hook-shaped structure 2208, 2210 projects from the top of the latch housing 2200 proximate one of the corresponding ends 2202, 2204. Hook-shaped as used herein refers to any member that has a crook, curve, or bend to thereby catch on another member. Each hook-shaped structure 2208, 2210 extends upwardly and then forwardly from the top of the latch housing 2200 such that the tip 2232, 2234 of that hook-shaped structure 2208, 2210 points toward the front of the vehicle when the latch housing 2200 is installed to the door 2102 of the vehicle's glove compartment and the door 2102 of the glove compartment is closed. A first slot 2236, 2238 is provided within each corresponding hook-shaped structure 2208, 2210 and extends through a portion of the housing body 2206 (as shown in
The attachment legs 2212, 2214 are for mounting the latch 2100 to the door 2102 of the vehicle's glove compartment. Each attachment leg 2212, 2214 projects from the bottom of the latch housing 2200 proximate one of the corresponding ends 2202, 2204. Each attachment leg 2212, 2214 extends downwardly and then forwardly from the bottom of the latch housing 2200 such that the flexible tip 2240, 2242 of that attachment leg 2212, 2214 points toward the front of the vehicle when the latch housing 2200 is installed to the door 2102 of the vehicle's glove compartment and the door 2102 of the glove compartment is closed. A receiving slot 2244, 2246 is provided proximate the tip 2240, 2242 of each corresponding attachment leg 2212, 2214 to permit the latch 2100 to be mounted to the door 2102 of the vehicle's glove compartment.
The solenoid housing 2216 has a generally rectangular frame for receiving the solenoid assembly 2400. The solenoid housing 2216 has a rear wall 2248, a first side wall 2250, a second side wall 2252, a bottom wall 2254, a first stop projection 2256, and a second stop projection 2258. The rearwall 2248 has a cutout 2260 to permit the solenoid (described below) of the solenoid assembly 2400 to be readily activated by a push or touch button (not shown) so that the door 2102 of the vehicle's glove compartment can be placed from the closed or locked position to the open or unlocked position. The opposing first and second side walls 2250, 22252 extend downwardly from the bottom wall 2228 of the housing body 2206. The bottom wall 2254 extends forwardly from the bottom of the rear wall 2248 toward the front of the vehicle, and has a flexible tip 2262 that points toward the rear of the vehicle when the latch housing 2200 is installed to the door 2102 of the vehicle's glove compartment and the door 2102 of the glove compartment is closed. The first stop projection 22256 is positioned at the top of the inner surface 2264 of the rear wall 2248 at a predetermined distance from the second side wall 2252. The second stop projection 2258 is positioned at about the midpoint of the inner surface 2266 of the second side wall 2252. The rear wall 2248, first stop projection 2256, and second stop projection 2258 define a cutout 2268 for receiving the solenoid lever (described below) of the solenoid assembly 2400. The first and second stop projections 2256, 2258 help to retain the solenoid lever within the cutout 2268 when the solenoid lever is caused to have translational linear motion. The rear wall 2248, first side wall 2250, bottom wall 2254, and first stop projection 2256 define a cutout 2270 for receiving the solenoid (described below) of the solenoid assembly 2400. The first stop projection 2256 and flexible tip 2262 help to retain the solenoid within the cutout 2270 when the solenoid assembly 2400 is assembled in the solenoid housing 2216.
As best shown in
As best shown in
As best shown in
Each pawl 2500, 2600 has a locking lug 2504, 2604, and is provided with a pawl slot 2506, 2606 to retain a keeper rod (not shown). Preferably the keeper rod is attached to a stationary panel, doorframe or compartment (not shown) at a position such that as the swinging panel or door 2102, to which the latch assembly 2100 is attached, is rotated to the closed position, the keeper rod will pass below the forward pointing portion of each of the hook-shaped structures 2208, 2210 and come into engagement with each of the pawls 2500, 2600.
As best shown in
As shown in
The latch assembly 2100 is actuated by a user pressing on a press or push button (not shown) that is in communication with the solenoid 2402. The button can be positioned on the vehicle's instrument panel (not shown), outside the door 2102 of the vehicle's glove compartment (not shown), or in any other location within the vehicle. It is obvious to one in the art that the latch assembly 2100 can also be actuated by a user pressing on a button or switch of a remote device that is in communication with the solenoid 2402. After the user presses the button, the solenoid 2402 is activated and the electromagnetic force created by the solenoid coil pulls the shaft 2404 into the solenoid 2402. The electromagnetic force also pulls the solenoid lever 2406, which is attached to the shaft 2404 via the pin 2408, toward the solenoid 2402, thereby compressing the solenoid spring 2410. Since the solenoid lever 2406 is engaged with the catch beam 2300 when the latch 2100 is assembled, the pull of the electromagnetic force causes the linear translational motion of the catch beam 2300 such that the second end 2304 of the catch beam 2300 moves toward the first end 2202 of the latch housing 2200. When the catch beam 2300 has moved past a predetermined distance such that the catch portions 2316, 2318 are out of engagement with the pawl lugs 2508, 2608, the pawls 2500, 2600 are freed for pivoting. The bias provided by each pawl torsional spring 2700, 2800 rotates the corresponding pawl 2500, 2600 from its closed position, where the keeper rod is cooperatively captured by the pawl slots 2506, 2606 and the hook-shaped structures 2208, 2210, to its open position. The rotation of each pawl 2500, 2600 brings the opening of the corresponding pawl slot 2506, 2606 out from under the corresponding hook-shaped structure 2208, 2210 and allows the keeper rod to be disengaged from the pawls 2500, 2600. The compartment or panel to which the latch assembly 2100 is attached can then be opened.
The compartment or panel (not shown) to which the latch assembly 2100 is attached can be closed by slamming the compartment or panel shut, or towards the front of the vehicle. When the compartment or panel is slammed shut, the keeper rod (not shown) that is attached to the compartment or panel will make contact with the pawls 2500, 2600 and rotate the pawls 2500, 2600 toward the closed position. After a predetermined distance, the keeper rod will pass below the forward pointing portion of each of the hook-shaped structures 2208, 2210 and come into engagement with each of the pawls 2500, 2600 in the pawl slots 2506, 2606. As the pawls 2500, 2600 are rotated toward the closed position such that the pawl lugs 2504, 2604 move upwardly and out of the first and third cutouts 2306, 2310 of the catch beam 2300, the solenoid spring 2410 biases the shaft 2404 and solenoid lever 2406, along with the engaged catch beam 2300, back toward the second end 2204 of the latch housing 2200.
Suitable mounting means are provided to retain the latch assembly 2100 on a panel or mounting surface (not shown). For example, as shown in
The latch assembly 2100 also has some additional features which enhance its resistance to tampering. Since the latch assembly 2100 is designed without access holes or openings, opportunity for unauthorized access to the latch assembly 2100 is reduced. Also, the pair of pawls 2500, 2600 provide additional strength to the latch assembly 2100 such that opportunity for unauthorized access to the latch assembly 2100 is reduced.
Another embodiment of the latch in accordance with the present invention is illustrated in
Referring to
As shown in
As best shown in
Each hook-shaped structure 3208, 3210 projects from the top of the latch housing body 3206 proximate one of the corresponding ends 3202, 33204. Hook-shaped as used herein refers to any member that has a crook, curve, or bend to thereby catch on another member. The hook shape of the structures 3208 and 3210 is most readily apparent from
The tabs 3212, 3214 are for mounting the latch 3100 to the outer shell 3101 of the door 3102 of the vehicle's glove compartment. Each tab 3212, 3214 projects upward from either side of a respective one of the hook-shaped structures 3208, 3210. The tabs 3212, 3214 are inserted into holes 3107, 3109 provided in the bottom of brackets 3111, 3113 that project from the inner surface of the outer shell 3101 of the door 3102. Thus the tabs 3212, 3214 in cooperation with brackets 3111, 3113 hold the hook-shaped structures 3208, 3210 securely relative to the inner surface of the outer shell 3101 of the door 3102 when the latch 3100 is mounted to the door 3102. The door 3102 also has an inner shell 3103 that mates with the outer shell 3101 to form the door 3102. The inner shell 3103 has openings 3105 that allow a respective keeper rod to be engaged by the pawls 3500, 3600 and the hook-shaped structures 3208, 3210.
Also projecting from the inner surface of the outer shell 3101 are cylindrical sleeves 3115 and 3117. The sleeves 3115 and 3117 register with the holes 3201 and 3203 of the housing 3200 when the latch 3100 is mounted to the outer shell 3101 of the door 3102. Self-tapping screws passing through holes 3201, 3203 are engaged to the sleeves 3115, 3117 to secure the latch housing 3200 to the outer shell 3101 of the door 3102. This arrangement results in a stronger attachment between the latch 3100 and the door 3102, which in turn results in increased pull and impact strength of the latch 3100.
As best shown in
The solenoid housing 3216 has a generally rectangular frame for receiving the solenoid assembly 3400. The solenoid housing 3216 supports the solenoid assembly 3400 such that the solenoid shaft 3404 is directly in line with the catch beam 3300 and the tip projection 3406 can engage the catch beam 3300 directly. This arrangement has the advantage that the number of parts required for the latch assembly 3100 is reduced, and consequently the material cost and the material requirements of the latch assembly 3100 are also reduced. The solenoid 3402 being in line with the catch beam 3300 has the further advantage that the catch beam can be moved with less pull/push force, thus requiring a smaller solenoid unit. This also brings the cost of the latch 3100 down.
The solenoid 3402 is selectively energized by a user using a switch (not shown) remotely located somewhere on the vehicle's instrument panel or console. The wiring to the control switch for the latch 3100 is arranged such that the vehicle's ignition key must be in the ignition switch before the solenoid 3402 can be energized using the control switch. The control switch for the latch 3100 can be of any well-known type.
As best shown in
Each of the pair of pawls 3500, 3600 is shown pivotally connected to the latch housing 3200 with suitable attachment means such as the pawl pivot members 3502, 3602 which are provided extending outwardly from the corresponding pawl 3500, 3600 at opposite sides thereof. Each pawl 3500, 3600 is installed onto the latch housing 3200 by snap-fit placement of the corresponding pawl pivot members 3502, 3602 into the corresponding pawl pivot recesses or holes 3272, 3274 disposed in the latch housing 3200. A pair of guide slots 3276, 3278 is provided on the latch housing 3200 leading from the edge of the latch housing 3200 to the corresponding pawl pivot recesses 3272, 3274 for guiding the corresponding pawl pivot members 3502, 3602, in the direction of the corresponding pawl pivot recesses 3272, 3274 during the snap-fitting operation.
Each pawl 3500, 3600 has a locking lug 3504, 3604, and is provided with a pawl slot 3506, 3606 to retain a respective one of two keeper rods (not shown). For the illustrated embodiment, the keeper rods are attached to the vehicle's instrument panel near the opening of the glove box. The keeper rods should be located at positions such that, as the swinging panel or door 3102 is rotated to the closed position, the keeper rods will pass below the forward pointing portion of respective hook-shaped structures 3208, 3210 and come into engagement with respective pawls 3500, 3600.
A pawl torsional spring 3700, 3800 is installed on a corresponding pawl 3500, 3600 with the coiled portions surrounding the corresponding pawl pivot members 3502, 3602. A loop of each pawl torsional spring 3700, 3800 engages the notch 3508, 3608 near the top of the corresponding pawl 3500, 3600. Each pawl torsional spring 3700, 3800 biases the corresponding pawl 3500, 3600 toward the open position shown in
The latch assembly 3100 is actuated by a user operating a switch (not shown) that controls current supply to the solenoid 3402 when the vehicle's key is in the ignition. The switch can be positioned on the vehicle's instrument panel (not shown), outside the door 3102 of the vehicle's glove compartment (not shown), or in any other location within the vehicle. In addition, a wireless remote may be used to energize the solenoid 3402. After the user energizes the solenoid 3402, the electromagnetic force created by the solenoid coil pulls the shaft 3404 into the solenoid 3402. Thus the tip projection 3406 is pulled toward the solenoid housing 3216 and the catch beam 3300 is pulled toward the unlocked position. In addition, the solenoid spring 3410 is compressed during this process. When the catch beam 3300 has moved out of engagement with the pawl lugs 3508, 3608, the pawls 3500, 3600 are freed for pivoting. The bias provided by each pawl torsional spring 3700, 3800 rotates the corresponding pawl 3500, 3600 from its closed position, where the keeper rod is cooperatively captured by the pawl slots 3506, 3606 and the hook-shaped structures 3208, 3210, to its open position. The rotation of the pawls 3500, 3600 to the open position brings the opening of the corresponding pawl slots 3506, 3606 out from under the hook-shaped structures 3208, 3210 and allows the keeper rods to be disengaged from the pawls 3500, 3600 The compartment or panel to which the latch assembly 3100 is attached can then be opened.
The compartment or panel (not shown) to which the latch assembly 3100 is attached can be closed by slamming the door 3102 shut. When the compartment or panel is slammed shut, the keeper rods (not shown) that are located near the opening of the compartment will make contact with the pawls 3500, 3600 and rotate the pawls 3500, 3600 toward the closed position. As the door 3102 rotates to its closed position, the keeper rods will pass below the forward pointing portion of the hook-shaped structures 3208, 3210 and come into engagement with the pawls 3500, 3600 in the pawl slots 3506, 3606. As the pawls 3500, 3600 are rotated toward their closed positions, the pawl lug 3504 moves out of the cutout 3308 and the pawl lug 3604 moves out of the way of the end 3304 of the catch beam 3300 to thus allow the catch beam 3300 to move to the locked position as urged by the solenoid spring 3410.
One problem encountered with other two-point latching systems is that when the glove box door is closed with a push on one side of the centerline of the door, rather than a push on the middle of the door, the flexibility of the door will tend to bring one keeper in the latch position before the other one. There is then a possibility to have the glove box door closed but only maintained by one keeper. This presents a clear danger to the passenger as the door might open in the event of an impact. In addition, the door is not flush with the adjacent interior trim moldings or instrument panel and will not meet the required style and appearance criteria. The chamfers (ramped or sloping surfaces) 3303 and 3301 have been provided on the catch beam at the end 3304 and on one side of the cutout 3308, respectively, to address this problem. If only one pawl reaches the closed position, the catch beam 3300 cannot move fully to the locked position and the respective pawl lug 3504 or 3604 will engage the catch beam in the area of the respective chamfer 3301 or 3303. When the user releases the door, the force of the respective torsion spring 3700 or 3800, through the interaction of the pawl lug with the respective chamfer, will overcome the force of the solenoid spring 3410 and will rotate the one pawl engaged by a keeper rod back to it's open position. Thus, the door 3102 will not remain closed unless both pawls 3500 and 3600 properly engage their respective keeper rods. Consequently, the door 3102 will drop back to the open position prompting the user attempt to close the door 3102 again until the door 3102 is properly secured in the closed position by the latch 3100.
A mechanical override can be provided to allow the opening of the door 3102 even when the power supply to the solenoid 3402 fails due for example to a dead battery. The mechanical override may include a cable attached at one end to the end 3302 of the catch beam 3300. The other end of the cable can be positioned at some location on the instrument panel access to which is controlled by a key. The fuse box for instance may be suitable for such a purpose. By pulling on the remote end of the cable the catch beam can then be moved to the unlocked position to thereby allow the door 3102 to be opened when power to the solenoid 3402 fails.
Furthermore, it should be born in mind that the latch 3100 can also be used to secure a door in the closed position when the keeper rods are carried by the moving door and the latch 3100 is supported by the stationary panel surrounding the opening of the compartment closed by the door.
The latch assembly 3100 also has some additional features which enhance its resistance to tampering. Since the latch assembly 3100 is designed without access holes or openings, opportunity for unauthorized access to the latch assembly 3100 is reduced. Also, the pair of pawls 3500, 3600 provide additional strength to the latch assembly 3100 such that opportunity for unauthorized access to the latch assembly 3100 is reduced.
It will be apparent to those skilled in the art that various modifications can be made to the present invention without departing from the scope and spirit of the invention, and it is intended that the present invention include all embodiments within the scope of the appended claims and their equivalents.
This application claims priority to U.S. Provisional Application No. 60/245,089, filed Nov. 1, 2000, and U.S. Provisional Application No. 60/254,605 filed Dec. 10, 2000, and U.S. Provisional Application No. 60/273,944, filed Mar. 7, 2001, and U.S. Provisional Application No. 60/318,839, filed Sep. 13, 2001, and U.S. Provisional Application No. 60/312,677 filed Aug. 15, 2001.
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| Number | Date | Country | |
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| 20030025339 A1 | Feb 2003 | US |
| Number | Date | Country | |
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| 60245089 | Nov 2000 | US | |
| 60254605 | Dec 2000 | US | |
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