JP6610176B2 - Vehicle seat locking device - Google Patents

Description

  The present invention relates to a vehicle seat locking device.

  Patent Document 1 discloses a conventional vehicle seat locking device. This locking device fixes a movable body constituting at least a part of the seat to the vehicle body. Specifically, the movable body is a seat back. This locking device includes a housing, a fork, a pole, a cam lever, and an engaging elastic member.

  The housing is provided on the seat back. The housing is formed with an entrance through which a striker provided in the vehicle body can enter. The fork is supported by the housing so as to be swingable about the fork axis. The fork can be displaced from the unlatched position to the overrun position beyond the latch position, in addition to the latch position that holds the striker in the entrance and the unlatched position that allows the striker to move away from the entrance. It has become.

  The pole is supported by the housing so as to be swingable around the pole axis. The pole is displaced to a block position that blocks the fork from displacing from the latched position to the unlatched position and an unblocked position that allows the fork to be displaced from the latched position to the unlatched position. The cam lever is supported by the housing so as to be swingable about the cam lever axis.

  The engaging elastic member can swing with the fork around the fork axis. The engagement elastic member is formed with an engagement contact portion disposed adjacent to the fork.

  In this locking device, when the occupant or the like moves the seat back so as to be fixed to the vehicle body, the striker enters the entrance. Then, the fork in the unlatched position is displaced to the latched position by the striker, so that the fork holds the striker in the entrance. Further, the pole is displaced to the block position, thereby blocking the fork from being displaced to the unlatched position. Thereby, the state where the striker is held by the fork in the entrance is maintained, the seat back is fixed to the vehicle body, and the occupant can sit on the seat.

  Here, in this locking device, the fork displaced to the latch position comes into contact with the engagement contact portion of the engagement elastic member. Thereby, the engagement elastic member elastically supports the fork at the latch position. Thus, in this locking device, the impact when the fork and the engaging elastic member come into contact with each other is buffered, and the generation of noise due to the contact between the fork and the engaging elastic member is prevented.

  In this locking device, the cam lever swings around the cam lever axis. As a result, the cam lever presses the fork at the latch position and swings the fork beyond the latch position, thereby moving the striker supported by the fork to the back side in the entrance. Then, when the striker comes into contact with the back end of the entrance, the swing of the fork is restricted, and the fork is displaced to the overrun position.

  On the other hand, in this lock device, when an occupant or the like performs an operation for moving the seat back, the pole at the block position is displaced to the unblock position. As a result, the fork is displaced to the unlatched position, and the striker moves away from the entrance. Thus, the fixation between the seat back and the vehicle body is released.

Japanese Patent No. 5145608

  However, in the conventional locking device described above, the striker is brought into contact with the back end of the entrance to restrict the swing of the fork. Therefore, when the fork is displaced to the overrun position, the striker hits the back end of the entrance. Abnormal noise is likely to occur due to contact, and quietness is likely to be impaired.

  The present invention has been made in view of the above-described conventional situation, and provides a vehicle seat locking device that can exhibit excellent quietness even when the fork is displaced to an overrun position. This is a problem to be solved.

A vehicle seat locking device of the present invention is a vehicle seat locking device for fixing a movable body constituting at least a part of a seat to a vehicle body,
A housing provided with one of the movable body and the vehicle body, and having an entrance through which a striker provided on the other of the movable body and the vehicle body can enter;
A fork that is supported by the housing so as to be able to swing around a fork axis, and that is displaced into a latch position that holds the striker in the advance port, and an unlatch position that allows the striker to move away from the advance port;
A block position which is supported by the housing so as to be swingable around a pole axis and blocks the fork from being displaced from the latch position to the unlatching position; and the fork is displaced from the latch position to the unlatching position. And a pole that is displaced to an unblocked position that allows
In the locking device, the fork is displaceable from the unlatched position to an overrun position that exceeds the latched position and positions the striker in the depth direction of the entrance.
Before SL fork has a first resilient means for resiliently supported with respect to the housing the fork by the overrun position integrally,
The fork is composed of a metal fork main body and an elastic resin covering portion as the first elastic means for covering the fork main body,
The covering portion has a first hollow portion formed in a hollow shape, and a support surface that is located in the vicinity of the first hollow portion and is formed flat in the thickness direction of the fork,
The first hollow portion includes a first through hole and a first deformation portion that is located outside the first through hole and extends along the first through hole,
The fork is characterized in that the support surface abuts against the housing while the first deformation portion is deformed with respect to the housing at the overrun position .

The lock apparatus of the present invention, full forks has integrally a first resilient means. The first elastic means elastically supports the fork with respect to the housing at the overrun position between the fork and the housing. Thereby, in this locking device, the swing of the fork when displaced to the overrun position side is restricted by the housing. Thus, in this locking device, it is not necessary to bring the striker into contact with the back end of the entrance as in the conventional locking device, in order to restrict the swing of the fork when displaced to the overrun position side. In this lock device, since the first elastic means elastically supports the fork between the housing and the fork, the noise hardly occurs between the fork and the housing.

  Therefore, the vehicle locking device of the present invention exhibits excellent quietness even when the fork is displaced to the overrun position.

In particular, this locking device, full forks has integrally a first resilient means. For this reason, in this locking device, when the fork is elastically supported with respect to the housing at the overrun position, an increase in the number of parts can be suppressed and manufacturing can be facilitated.

Off forks may have a second elastic means for elastically supporting the housing fork in unlatched position further integrally. The covering portion may be a second elastic means. And it is preferable that a coating | coated part has the 2nd hollow part formed in hollow shape .

In this case, the swinging of the fork when displaced to the unlatched position side can be restricted by the housing. At this time, since the second elastic means also elastically supports the fork between the housing and the fork, the noise hardly occurs between the fork and the housing. Since the full forks having at even integral second elastic means, in this locking device, when also elastically supported relative to the housing in the unlatched position the fork, it can suppress an increase in the number of components.

The fork includes a metal fork main body and an elastic resin covering portion that covers the fork main body . For this reason , the fork at the overrun position or the unlatched position is elastically supported with respect to the housing by the covering portion, so that the impact when the fork at the overrun position or the unlatched position abuts the housing. It becomes possible to buffer .

The coating | coated part has the 1st hollow part formed in hollow shape . The first elastic means is a covering portion. Since the first hollow portion is hollow, the first hollow portion is easily elastically deformed when supporting the fork at the overrun position. Thereby, the 1st hollow part can buffer suitably the impact at the time of the fork in an overrun position contacting a housing. For this reason, in this locking device, generation | occurrence | production of the noise by the fork in an overrun position contact | abutting with a housing can be suppressed suitably.

  The covering portion preferably has a second hollow portion formed in a hollow shape. And it is preferable that a 2nd elastic means is a 2nd hollow part. In this case, the second hollow portion is also easily elastically deformed when supporting the fork in the unlatched position. Thereby, the 2nd hollow part can buffer suitably the impact at the time of the fork in an unlatching position contacting a housing. For this reason, in this lock device, generation | occurrence | production of the noise by the fork in an unlatching position contact | abutting with a housing can be suppressed suitably.

  The vehicle locking device of the present invention exhibits excellent quietness even when the fork is displaced to the overrun position.

FIG. 1 is a partial perspective view illustrating a state in which a movable body is fixed to a vehicle body, according to a vehicle seat in which the vehicle seat locking device of the embodiment is employed. FIG. 2 is a partial perspective view illustrating a state in which the movable body and the vehicle body are released from being fixed, according to the vehicle seat in which the vehicle seat locking device according to the embodiment is employed. FIG. 3 is a front view of the vehicle seat locking device according to the embodiment as seen from the rear of the vehicle. FIG. 4 is a top view of the vehicle seat locking device according to the embodiment. FIG. 5 is a left side view of the vehicle seat locking device according to the embodiment. FIG. 6 is an exploded perspective view showing the lock device main body according to the vehicle seat lock device of the embodiment. FIG. 7 is a side view and a sectional view showing a fork and a striker according to the vehicle seat locking device of the embodiment. FIG. 8 is an exploded perspective view of the electric actuator according to the vehicle seat locking device of the embodiment. FIG. 9 is a perspective view illustrating the assembly of the lock device main body and the electric actuator according to the vehicle seat lock device of the embodiment. FIG. 10 is a perspective view showing a state in which the fork is in the latch position, the pole is in the block position, and the electric actuator is not operating, according to the vehicle seat locking device of the embodiment. FIG. 11 is a perspective view illustrating a state in which the fork is in the unlatched position and the pawl is in the unblocked position when the electric actuator is operated according to the vehicle seat locking device of the embodiment. FIG. 12 is a schematic diagram illustrating a state in which the fork is in the unlatched position and the pole is in the unblocked position according to the vehicle seat locking device of the embodiment. FIG. 13 is a schematic diagram illustrating a state in which the fork is in the latch position and the pole is in the block position according to the vehicle seat locking device of the embodiment. FIG. 14 is a schematic diagram illustrating a state in which the fork is in the overrun position and the pole is in the block position according to the vehicle seat locking device of the embodiment.

  DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments embodying the present invention will be described below with reference to the drawings.

  As shown in FIG.1 and FIG.2, the locking device 1 of an Example is an example of the specific aspect of the locking device of the vehicle seat of this invention. The locking device 1 is employed in a seat 5 provided on the rear side of a vehicle such as an automobile. The seat 5 has a seat cushion 5 </ b> A and a seat back 6. The seat back 6 is an example of the “movable body” in the present invention.

  In FIG. 1, the front side of the page is the front side of the vehicle, and the back side of the page is the rear side of the vehicle. Further, the upper left side of the drawing is the right side of the vehicle, and the lower right side of the drawing is the left side of the vehicle. Furthermore, the upper side of the paper is the upper side of the vehicle, and the lower side of the paper is the lower side of the vehicle. Then, the front-rear direction, the left-right direction, and the up-down direction shown in the drawings after FIG. 2 are all displayed in correspondence with FIG. Further, the front-rear direction and the up-down direction when describing the configuration of the lock device 1 are based on the posture of the lock device 1 in a state where the seat back 6 is erected as shown in FIG.

  As shown in FIGS. 1 and 2, the seat cushion 5 </ b> A is fixed to the floor surface of the vehicle body 9. The seat back 6 is supported by the seat cushion 5A so as to be swingable around a swing axis X6 extending in the vehicle inside / outside direction on the rear end side of the seat cushion 5A. As shown in FIG. 1, the locking device 1 is assembled inside the corner portion on the upper end side and the vehicle upper right side of the seat back 6 in a standing state. As shown in FIG. 1, the striker 3 is provided on the vehicle body 9 at a position corresponding to the locking device 1 in a state where the seat back 6 is erected. The striker 3 is a substantially U-shaped steel material, and projects substantially horizontally from the vehicle body 9 to the left side of the vehicle.

  As shown in FIG. 1, the locking device 1 is in a locked state in which the seat back 6 is fixed to the vehicle body 9 by engaging the striker 3 with the seat back 6 standing up. As shown in FIG. 1, an unlocking knob 68N protrudes upward at a corner on the upper end side and on the right side of the vehicle in the seat back 6 in a standing state. The lock device 1 is not engaged with the striker 3 and releases the seat back 6 by an operation of pulling up the lock release knob 68N in addition to control by a control device (not shown). As a result, as shown in FIG. 2, the seat back 6 is allowed to fall forward. The unlocking knob 68N also serves as an indicator indicating unlocking. Details of fixing and releasing the vehicle body 9 and the seat back 6 will be described later.

  As shown in FIGS. 1 to 4, a frame 7 made of a metal pipe is provided inside the seat back 6. As shown in FIG. 3, a pair of upper and lower mounting bases 7 </ b> A and 7 </ b> B are welded to the frame 7. A screw hole 7M is formed on the right side surface of the mounting base 7A. A nut 90A is fixed inside the mounting base 7A. A screw hole 7N is formed on the right side surface of the mounting base 7B. A nut 90B is fixed inside the mounting base 7B. The shapes and configurations of the frame 7, the mounting base 7 </ b> A, and the mounting base 7 </ b> B are examples, and these can be appropriately changed according to the shape of the seat back 6.

  As shown in FIGS. 3 to 5 and the like, the lock device 1 includes a lock device main body 1A and an electric actuator 1B.

  As shown in FIG. 6, the locking device main body 1 </ b> A includes a first housing 11, a fork 13, a pole 15, a pressing lever 17, a fork support shaft 19, a pole support shaft 21, and a press lever support shaft 23. The rod clip 25, the connecting rod 27, and first to third torsion coil springs 29 to 31 are provided. The first housing 11 is an example of the “housing” in the present invention.

  The first housing 11 includes a base plate 11A and a cover plate 11B. The base plate 11A is formed of a steel plate. The base plate 11 </ b> A has a first flat part 110 and a wall part 111. The 1st flat part 110 is extended flatly in the front-back direction and the up-down direction. An entrance 112 is cut out in a substantially U-shape at approximately the center in the vertical direction of the first flat portion 110. The entrance 112 extends from the rear end edge of the first flat portion 110 toward the front side.

  The first flat portion 110 is provided with first and second insertion holes 113A and 113B. The first insertion hole 113A and the second insertion hole 113B are disposed so as to straddle the entrance 112. Specifically, in the first flat portion 110, the first insertion hole 113A is provided below the entrance 112, and the second insertion hole 113B is provided above the entrance 112. The first insertion hole 113 </ b> A is located at a location near the back end 112 </ b> A of the entrance 112. On the other hand, the 2nd penetration hole 113B is located in the location nearer the rear end edge of the 1st flat part 110 than 113A of 1st penetration holes. Further, the first flat portion 110 has a groove 114 extending in the vertical direction.

  The wall portion 111 is erected substantially perpendicularly to the left with respect to the first flat portion 110. The wall portion 111 is continuous with the first flat portion 110 and surrounds the periphery of the first flat portion 110 except for the rear edge of the first flat portion 110. Further, the wall portion 111 is formed with a first flange portion 115A extending downward and a second flange portion 115B extending upward. The first flange portion 115A is provided with an attachment hole 116A, and the second flange portion 115B is provided with an attachment hole 116B.

  The cover plate 11B is also formed of a steel plate. The cover plate 11B has a second flat portion 117 and a fixing portion 118. An entrance 119 is cut out in a substantially U-shape at approximately the center in the vertical direction of the second flat portion 117. The entrance 119 is formed in the same shape as the entrance 112, and extends from the rear end edge of the second flat portion 117 toward the front side.

  The second flat portion 117 is provided with third to fifth insertion holes 113C to 113E. The third insertion hole 113C and the fourth insertion hole 113D are disposed so as to straddle the entrance 119. Specifically, the third insertion hole 113 </ b> C is provided in the second flat portion 117 at a position below the entrance 119 and near the back end 119 </ b> A of the entrance 119. On the other hand, the third insertion hole 113D is provided in the second flat portion 117 at a position above the entrance 119 and near the rear end edge of the second flat portion 117 than the third insertion hole 113C. ing.

  The fifth insertion hole 113E is provided at a position on the front side of the fourth insertion hole 113D and slightly above the fourth insertion hole 113D. That is, the fifth insertion hole 113E is located above the entrance 119 in the second flat portion 117 and at a location near the back end 119A of the entrance 119 than the fourth insertion hole 113D. .

  In the second flat portion 117, a locking hole 310 is provided at a position slightly in front of and above the fifth insertion hole 113E. Further, in the second flat portion 117, a mounting hole 116 </ b> C is penetratingly provided at a position below the third insertion hole 113 </ b> C. In the second flat portion 117, a mounting hole 116 </ b> D is provided at a location above the third and fourth insertion holes 113 </ b> D and 113 </ b> E and the engagement hole 310.

  The second flat portion 117 is disposed on the left side of the first flat portion 110 by combining the base plate 11A and the cover plate 11B in the left-right direction. At this time, the entrance 112 and the entrance 119 are aligned in the left-right direction. Thereby, the striker 3 provided in the vehicle body 9 can enter the entrances 112 and 119. Details of the entrances 112 and 119 will be described later.

  Similarly, the first insertion hole 113A and the third insertion hole 113C are aligned in the left-right direction, and the second insertion hole 113B and the fourth insertion hole 113D are aligned in the left-right direction. Furthermore, as shown in FIG. 9, the mounting hole 116A and the mounting hole 116C are aligned in the left-right direction, and the mounting hole 116B and the mounting hole 116D are aligned in the left-right direction.

  As shown in FIG. 6, the fixing portion 118 is continuous with the front end of the second flat portion 117 and is erected substantially perpendicularly to the left with respect to the second flat portion 117. The fixed part 118 extends in the up-down direction. An insertion hole 118A is provided below the fixed portion 118, and an insertion hole 118B is provided on the upper side.

As shown in FIG. 7, the fork 13 includes a fork main body 13A formed of a thick steel plate member, and an elastic resin covering portion 13B that covers the fork main body 13A . Specifically, the covering portion 13B is made of an elastomer, and the fork 13 is formed by insert-molding the fork main body 13A into the covering portion 13B. The fork 13 is formed with a fork shaft hole 130 that penetrates the fork main body 13A and the covering portion 13B.

  The fork main body 13A is formed with an engaging recess 131, a pressed surface 132, and a claw portion 133. The engaging recess 131 is recessed in a substantially U shape from the outer peripheral side of the fork main body 13 </ b> A toward the fork shaft hole 130. The pressed surface 132 is formed in a concave curved surface shape and is exposed from the covering portion 13B. In the present embodiment, the pressed surface 132 also serves as a latch surface that can come into contact with a pole 17 at a block position described later. The claw portion 133 is located on the opposite side of the pressed surface 132 with the engaging recess 131 interposed therebetween. The tip of the claw portion 133 is exposed from the covering portion 13B.

The covering portion 13 </ b> B includes first to third hollow portions 134 to 136, first and second support surfaces 137 and 138, and a sandwiching portion 139. The first hollow portion 134 has a first through hole 134A formed in a substantially semicircular shape, and a first deformation portion 134B that is located outside the first through hole 134A and extends in an arc shape along the first through hole 134A. It consists of .

The second hollow portion 135 includes a second through hole 135A formed in a circular shape, a second deformation portion 135B that is located outside the second through hole 135A and extends in an arc shape along the second through hole 135A, The first concave groove 135C is recessed from the surface of the covering portion 13B and continues to the second through hole 135A .

  The third hollow portion 136 is a third through hole 136A formed in a substantially rectangular long hole shape, and is positioned outside the third through hole 136A and extends in a straight line along the third through hole 136A. A portion 136B and a second concave groove 136C that is recessed from the surface of the covering portion 13B and continues to the third through hole 136A. In addition, each shape of the 1st-3rd hollow parts 134-136 is an example, and can be designed suitably.

  The first support surface 137 is formed in the vicinity of the first hollow portion 134. The second support surface 138 is formed in the vicinity of the second hollow portion 134. These first and second support surfaces 137 and 138 are formed flat in the thickness direction of the fork 13.

  The clamping part 139 is recessed in a substantially U shape so as to follow the engaging recess 131 of the fork main body 13A. The clamping part 139 can clamp the striker 3 that has entered the entrances 112 and 119. Here, the length L1 of the width of the clamping part 139 is formed slightly smaller than the length L2 of the diameter of the striker 3.

  The pole 15 shown in FIG. 6 is formed of a steel plate member having a thickness of about two-thirds of the thickness of the steel plate member forming the fork main body 13A, and has a shape extending in the front-rear direction. ing. The pole 15 includes a stopper surface 151, a convex portion 152, a pole shaft hole 153, a locking hole 154, a pressed protrusion 155, and a mounting hole 156.

  The stopper surface 151 is located approximately at the center of the pole 15 in the front-rear direction. The stopper surface 151 is formed in a convex curved shape and extends downward toward the fork 13. The convex portion 152 is located at the approximate center of the pole 15 in the front-rear direction, is located on the opposite side of the stopper surface 151, and protrudes upward. The pole shaft hole 153 extends through the rear end of the pole 15. The locking hole 154 is provided in the vicinity of the pole shaft hole 153, that is, at a position closer to the rear end than the approximate center of the pole 15 in the front-rear direction. The pressed protrusion 155 is formed at the front end of the pole 15 and is bent upward while extending toward the left side. The mounting hole 156 is provided in the pole 15 at a location on the opposite side of the pole shaft hole 153 across the stopper surface 151 and the convex portion 152, and is located in the vicinity of the pressed protrusion 155.

  The pressing lever 17 is formed of a steel plate member having a thickness that is about one third of the thickness of the steel plate member forming the fork main body 13A. The pressing lever 17 is formed smaller than the fork 13 and the pole 17. The pressing lever 17 includes a pressing lever shaft hole 171, a pressing surface 172, and a pressed portion 173.

  The pressing lever shaft hole 171 penetrates the rear end of the pressing lever 17. As shown in FIGS. 12 to 14, the pressing surface 172 is formed at the front end of the pressing lever 17 and extends in a convex curved shape toward the lower side. As shown in FIG. 6, the pressed portion 173 is formed on the upper side of the pressing lever 17 and extends to the right side toward the convex portion 152 of the pole 15.

  The fork support shaft 19, the pole support shaft 21, and the pressing lever support shaft 23 are all metal multistage cylindrical shaft bodies. The fork support shaft 19 extends left and right in the axial direction. A first shaft portion 191 extending toward the base plate 11A is formed at the right end of the fork support shaft 19, and a second shaft portion 192 extending toward the cover plate 11B is formed at the left end of the fork support shaft 19. ing. In the fork support shaft 19, the first and second large diameter portions 193 and 194 having a larger diameter than the first and second shaft portions 191 and 192 are provided between the first shaft portion 191 and the second shaft portion 192. Is formed. The first large diameter portion 193 is formed to have a larger diameter than the second large diameter portion 194.

  The pole support shaft 21 extends to the left and right in the axial direction, and extends parallel to the fork support shaft 19. A third shaft portion 211 extending toward the base plate 11A is formed at the right end of the pole support shaft 21, and a fourth shaft portion 212 extending toward the cover plate 11B is formed at the left end of the pole support shaft 21. ing. In the pole support shaft 21, the third and fourth large diameter portions 213 and 214 having a larger diameter than the third and fourth shaft portions 211 and 212 are provided between the third shaft portion 211 and the fourth shaft portion 212. Is formed. The third large diameter portion 213 is formed to have a larger diameter than the fourth large diameter portion 214.

  The pressing lever support shaft 23 extends to the left and right in the axial direction, and extends in parallel with the fork support shaft 19 and the pole support shaft 21. A fifth shaft portion 231 extending toward the cover plate 11B is formed at the left end of the pressing lever support shaft 23, and a fifth shaft portion 231 having a larger diameter than the fifth shaft portion 231 is formed at the right end of the pressing lever support shaft 23. Five large diameter portions 232 are formed. In addition, a sixth large diameter portion 233 is formed between the fifth shaft portion 231 and the fifth large diameter portion 232. The fifth large diameter portion 232 is formed to have a larger diameter than the sixth large diameter portion 233. The pressing lever support shaft 23 is not formed with a shaft portion extending toward the base plate 11 </ b> A, such as the first shaft portion 191 of the fork support shaft 19 and the third shaft portion 211 of the pole support shaft 21.

  The rod clip 25 is made of resin. A rod insertion hole 251 is formed at the lower end of the rod clip 25, and a fixing portion 252 extending rightward toward the attachment hole 156 of the pole 15 is formed. A rod holding portion 253 is formed at the upper end of the rod clip 25.

  In the lock device main body 1 </ b> A, the second large diameter portion 194 of the fork support shaft 19 is inserted into the fork shaft hole 130 of the fork 13. In addition, the first shaft portion 191 is fixed to the first flat portion 110 by being crimped after being inserted into the first insertion hole 113A of the base plate 11A.

  As shown in FIG. 6, the fourth large diameter portion 214 of the pole support shaft 21 is inserted into the pole shaft hole 153 of the pole 15. Further, the third shaft portion 211 is fixed to the first flat portion 110 by being crimped after being inserted into the second insertion hole 113B of the base plate 11A. Further, the rod clip 25 is fixed to the pole 15 by fixing the fixing portion 252 of the rod clip 25 to the mounting hole 156 of the pole 15. The lower end of the connecting rod 27 is inserted into the rod insertion hole 251 of the rod clip 25, and the connecting rod 27 is held by the rod holding portion 253. Thereby, the lower end of the connecting rod 27 is connected to the pole 15 through the rod clip 25. The connecting rod 27 extends to the outside of the base plate 11 </ b> A, that is, the first housing 11. Although not shown, the upper end of the connecting rod 27 is connected to the unlocking knob 68N shown in FIGS.

  As shown in FIG. 6, the sixth large-diameter portion 233 of the pressing lever support shaft 23 is inserted into the pressing lever shaft hole 171 of the pressing lever 17. Further, the fifth shaft portion 231 is fixed to the second flat portion 117 by being crimped after being inserted into the fifth insertion hole 113E of the cover plate 11B. A third torsion coil spring 31 is attached between the pressing lever 17 and the pressing lever support shaft 23. The third torsion coil spring 31 includes a third coil part 31A, a fifth arm part 31B connected to the third coil part 31A, and a sixth arm part 31C connected to the third coil part 31A. The third coil portion 31 </ b> A is inserted through the fifth large diameter portion 232 of the pressing lever support shaft 23 and is disposed on the right side of the pressing lever 17. The 5th arm part 31B is latched by the press lever 17, as shown in FIGS. As shown in FIG. 5, the sixth arm portion 31 </ b> C is inserted into the engagement hole 310 of the cover plate 11 </ b> B and is locked to the second flat portion 117.

  Then, as shown in FIG. 6, the base plate 11A and the cover plate 11B are assembled in the left-right direction. At this time, the second shaft portion 192 of the fork support shaft 19 is inserted into the third insertion hole 113C of the cover plate 11B and crimped. Thus, the fork 13 is disposed on the lower side in the first housing 11 while being supported by the base plate 11 </ b> A and the cover plate 11 </ b> B through both ends of the fork support shaft 19. The fork 13 can swing around the fork axis X1 as the axis of the fork support shaft 19, and the unlatched position shown in FIGS. 11 and 12 and the latched position shown in FIGS. 10 and 13 around the fork axis X1. And it can be displaced to the overrun position shown in FIG.

  Here, as shown in FIG. 6, the first torsion coil spring 29 is attached between the fork 13 and the cover plate 11B. The first torsion coil spring 29 includes a first coil part 29A, a first arm part 29B connected to the first coil part 29A, and a second arm part 29C connected to the first coil part 29A. The first coil portion 29A is inserted into the first large diameter portion 193 of the fork support shaft 19 and is disposed on the left side of the fork 13, that is, between the fork 13 and the cover plate 11B, as shown in FIGS. Is done. The first arm portion 29B is locked to the fork 13. The second arm portion 29C is disposed between the fork 13 and the wall portion 111 of the base plate 11A, and is locked to the wall portion 111. As a result, the first torsion coil spring 29 urges the fork 13 toward the first direction D1, that is, the unlatched position, as shown by the solid line arrows in FIGS. For ease of explanation, the cover plate 11B is not shown in FIGS. Further, the entrance 112 and the entrance 119 are simultaneously described by attaching the reference numerals 119 and 119A to the entrance 112 formed in the base plate 11A.

  Further, as shown in FIG. 6, when the base plate 11A and the cover plate 11B are assembled in the left-right direction, the fourth shaft portion 212 of the pole support shaft 21 is inserted into the fourth insertion hole 113D of the cover plate 11B. It is crimped. Thus, the pole 15 is also arranged on the upper side in the first housing 11 while being supported by the base plate 11A and the cover plate 11B through both ends of the pole support shaft 21, respectively. More specifically, as shown in FIGS. 10 to 14, the pole 15 is disposed above the fork 13 and the entrances 112 and 119 in the first housing 11. The pole 15 can swing with the axis of the pole support shaft 21 as the pole axis X2, and the unblock position shown in FIGS. 11 and 12 around the pole axis X2, and FIGS. It can be displaced to the block position shown in FIG.

  Moreover, as shown in FIG. 6, the 2nd torsion coil spring 30 is attached between the pole 15 and the cover plate 11B. The second torsion coil spring 30 includes a second coil part 30A, a third arm part 30B connected to the second coil part 30A, and a fourth arm part 30C connected to the second coil part 30A. As shown in FIGS. 12 to 14, the second coil portion 30 </ b> A is inserted into the third large-diameter portion 213 of the pole support shaft 21 and is disposed on the left side of the pole 15, that is, between the pole 15 and the cover plate 11 </ b> B. Is done. The third arm portion 30B is disposed on the wall portion 111 of the pole 15 and the base plate 11A, and is locked to the wall portion 111. The fourth arm portion 29 </ b> C is inserted into the locking hole 154 of the pole 15 and is locked to the pole 15. As a result, the second torsion coil spring 30 urges the pole 15 toward the third direction D3, that is, the block position, as indicated by the broken-line arrows in FIGS.

  Furthermore, the pressing lever 17 is disposed on the left front side of the pole 15 in the first housing 11 by assembling the base plate 11A and the cover plate 11B in the left-right direction. That is, the pressing lever 17 is also disposed above the fork 13 and the entrances 112 and 119 in the first housing 11. Here, in the lock device main body 1A, the pressing lever support shaft 23 is not fixed to the base plate 11A, and the pressing lever 17 is supported only by the cover plate 11B through the pressing lever support shaft 23. The pressing lever 17 can swing with the pressing lever support shaft 23 as the pressing lever shaft center X3. The pressing lever 17 is separated from the separated position shown in FIGS. It can be displaced to the pressing position shown. Further, the third torsion coil spring 31 urges the pressing lever 17 toward the fifth direction D5, that is, the pressing position, as indicated by a one-dot chain line arrow of FIGS. Thus, the fork 13, the pole 15, the pressing lever 17, and the like are arranged in the first housing 11, and the lock device main body 1A is completed.

  And in this locking device main body 1A, as shown in FIG. 6, compared with the 2nd and 4th insertion holes 113B and 113D in which the pole support shaft 21 is inserted, the 5th insertion hole into which the press lever support shaft 23 is inserted. 113E is arranged on the front side. For this reason, as shown in FIGS. 10 to 14, the pressing lever support shaft 23 is arranged to be separated from the pole support shaft 21 in the front side. That is, the pole axis X2 and the pressing lever axis X3 are separated from each other.

  As shown in FIGS. 12 to 14, in the lock device main body 1 </ b> A, the above-described entrances 112 and 119 extend substantially parallel to a virtual straight line Y connecting the pole axis X <b> 2 and the pressing lever axis X <b> 3. ing. The entrances 112 and 119 are open on the pole axis X2 side so that the striker 3 can enter, and the back ends 112A and 119A are on the fork axis X1 and the pressing lever axis X3 side. It is located between the pressing lever axis X3. Further, as shown in FIG. 14, the back ends 112A and 119A are located on the back side of the striker 3 when the fork 13 holds the striker 3 in the overrun position, that is, on the front side of the lock device main body 1A. ing. Thus, the entrances 112 and 119 are formed deeper on the front side of the locking device main body 1A than the striker 3 held by the fork 13 in the overrun position.

  As shown in FIG. 8, the electric actuator 1 </ b> B includes a second housing 33, a motor 35, a worm gear 37, a worm wheel 39, first and second electrodes 41 and 42, and a fourth torsion coil spring 43. ing.

  The second housing 33 includes a main housing 33A and a cover housing 33B. A connector portion 330 is formed at the upper left end portion of the second housing 33. More specifically, a front portion of the connector portion 330 is formed at the upper left end portion of the main housing 33A, and a rear portion of the connector portion 330 is formed at the upper left end portion of the cover housing 33B. The position of the connector portion 330 in the second housing 33 can be designed as appropriate.

  A motor housing chamber 331, a gear housing chamber 332, first to fourth engaging recesses 333 to 336, and fixing holes 337 and 338 are formed in the main housing 33A. The motor housing chamber 331 is disposed on the upper side of the main housing 33A, and the gear housing chamber 332 is disposed on the lower side of the motor housing chamber 331. A gear support shaft 339 extending toward the rear side is formed in the gear housing chamber 332.

  The cover housing 33B is formed with first through fourth engaging claws 341 to 344 and a sixth insertion hole 345.

  A known electric motor is employed for the motor 35. The worm gear 37 is fixed to a rotating shaft 35 </ b> A of the motor 35 and is rotated by the motor 35.

  The worm wheel 39 includes a gear portion 39A that meshes with the worm gear 37, and a cam portion 39B that is integrated with the gear portion 39A and is located on the rear side of the gear portion 39A. The worm wheel 39 is formed with a gear shaft hole 390 that passes through the gear portion 39A and the cam portion 39B. Further, a pressing portion 391 is formed on the cam portion 39B.

  The motor 35 is housed in the motor housing chamber 331 of the main housing 33A. At this time, one end of each of the first and second electrodes 41 and 42 is connected to the motor 35. As shown in FIGS. 10 and 11, the other ends of the first and second electrodes 41 and 42 are disposed in the connector portion 330. The worm gear 37 is housed on the left side of the gear housing chamber 332.

  As shown in FIG. 8, the worm wheel 39 is housed on the right side of the gear housing chamber 332 with the gear support shaft 339 inserted through the gear shaft hole 390 and supported by the gear support shaft 339. Thereby, in the worm wheel 39, the gear portion 39 meshes with the worm gear 37. The worm wheel 39 is rotatable about the rotation axis X5 in the eighth direction D8 indicated by the white arrow in FIG. 11 with the axis of the gear support shaft 339 as the rotation axis X5. As shown in FIG. 8, a fourth torsion coil spring 43 is attached between the main housing 33 </ b> A and the worm wheel 39. The fourth torsion coil spring 43 includes a fourth coil part 43A, a seventh arm part 43B connected to the fourth coil part 43A, and an eighth arm part 43C connected to the fourth coil part 43A. Although not shown in detail, the fourth coil portion 43A is inserted through the gear support shaft 339 and is disposed on the front side of the gear portion 39A, that is, between the main housing 33A and the gear portion 39A. The seventh and eighth arm portions 43B and 43C are locked to the worm wheel 39 and the gear housing chamber 332, respectively. Accordingly, the fourth torsion coil spring 43 is biased in the seventh direction D7 indicated by the white arrow in FIG. 10, that is, the direction opposite to the eighth direction D8 shown in FIG.

  After the motor 35, the war gear 37, the worm wheel 39, and the like are arranged, the cover housing 33B is assembled to the main housing 33A. At this time, the main housing 33A and the cover housing 33B are fixed by the first to fourth engagement claw portions 341 to 345 engaging with the first to fourth engagement recesses 333 to 336, respectively. Further, the rear end of the gear support shaft 339 is inserted into the sixth insertion hole 345. Thus, the electric actuator 1B is completed.

As shown in FIG. 9, the lock device main body 1A and the electric actuator 1B are fixed and integrated by fixing screws 45A and 45B. Specifically, the fixing screw 45 </ b> A is fixed to the fixing hole 337 while being inserted into the insertion hole 118 </ b> A of the fixing portion 118. Similarly, the fixing screw 45B is fixed to the fixing hole 338 while being inserted into the insertion hole 118B of the fixing portion 118. In this way, the fixing portion 118 is fixed to the cover housing 33B, whereby the first housing 11 and the second housing 33 are fixed, and the locking device 1 is completed. Here, in the locking device 1, the first housing 11 and second housing 33 is fixed in a state that Ryakujika exchange. That is, in the lock device 1, as shown in FIGS. 3 to 5, the lock device main body 1 </ b> A is disposed in the front-rear direction, while the electric actuator 1 </ b> B is positioned on the front side of the lock device main body 1 </ b> A. It is arranged in the left-right direction with respect to 1A.

Further, by making the first housing 11 and second housing 33 is fixed in a state of Ryakujika exchange, as shown in FIGS. 10 and 11, the locking device 1, the fork 13, the pole 15 and the pressing lever 17 with respect to the direction that swings each of the motor 35, Wogiya 37 and the worm wheel 39 is arranged to Ryakujika exchange. Then, the worm wheel 39, the pole 15 or the like is rotated at a rotational axis X5 around in a direction substantially Cartesian to the direction of swing. Further, the pressed protrusion 155 of the pole 15 is in contact with the cam portion 39B of the worm wheel 39. 10 and 11, the illustration of the cover plate 11B and the cover housing 33B is omitted, and the rod clip 25, the connecting rod 27, and the first to third torsion coil springs 29 to 31 are omitted. Etc. are omitted.

  As shown in FIG. 3, the locking device 1 is fixed to the frame 7 by bolts 47A and 47B. Specifically, the bolt 47A is inserted through the mounting hole 116A and the mounting hole 116C of the first housing 11 and the screw hole 7M of the mounting base 7A, and screwed into the nut 90A. Similarly, the bolt 47B is inserted through the mounting hole 116B and mounting hole 116D of the first housing 11 and the screw hole 7N of the mounting base 7B, and screwed into the nut 90B. Thus, the locking device 1 is fixed to the right side of the frame 7 by fixing the first housing 11 to the mounting bases 7A and 7B.

Here, as described above, the locking device 1, the first housing 11 and second housing 33 is fixed in a state that Ryakujika exchange. For this reason, as shown in FIG. 4, when the locking device 1 is fixed to the right side of the frame 7, the second housing 33, that is, the electric actuator 1 </ b> B is arranged in a state of wrapping around from the front side of the frame 7 to the left side. . The electric actuator 1B is electrically connected to a vehicle control device (not shown) through the connector portion 330.

  In the lock device 1 having such a configuration, when the seatback 6 in a state in which an occupant or the like has fallen as shown in FIG. 2 is swung rearward to stand up as shown in FIG. Thus, the striker 3 enters the entrances 112 and 119. At this time, the fork 13 is displaced to the unlatched position as described above by the biasing force of the first torsion coil spring 29. The fork 13 displaced to the unlatched position presses the pole 15 upward in the first housing 11. Therefore, the pole 15 swings in the fourth direction D4 around the pole axis X2 and is displaced to the unblock position while resisting the biasing force of the second torsion coil spring 30. Further, when the pole 15 is displaced to the unblocked position, the convex portion 152 of the pole 15 presses the pressed portion 173 of the pressing lever 17 upward. For this reason, the pressing lever 17 is also swung in the sixth direction D6 around the pressing lever axis X3 and displaced to the separated position against the urging force of the third torsion coil spring 31. When the pressing lever 17 is displaced to the separation position, the pressing surface 172 is separated from the pressed surface 132 of the fork 13.

  The striker 3 that has entered the entrances 112 and 119 further moves along the entrances 112 and 119 toward the back ends 112A and 119A, and comes into contact with the third deformation portion 136B of the third hollow portion 136 of the fork 13. At this time, the third deformation portion 136B is elastically deformed to buffer an impact when it comes into contact with the striker 3. The striker 3 moving through the entrances 112 and 119 is held by the holding portion 139 and resists the biasing force of the first torsion coil spring 29, as shown in FIG. Swing around D2 direction. As a result, the fork 13 is displaced to the latch position.

  The fork 13 is positioned so that the claw portion 133 closes the entrances 112 and 119 by being displaced to the latch position. Thereby, the fork 13 holds the striker 3 in the entrances 112 and 119 by holding the striker 3 by the holding part 139. Here, as described above, since the length L1 in the width direction of the holding portion 139 is shorter than the length L2 of the diameter of the striker 3, the holding portion 139 holds the striker 3 while being elastically deformed.

  Further, when the fork 13 is displaced to the latch position, the fork 13 does not press the pole 15. For this reason, the pole 15 is swung in the third direction D3 around the pole axis X2 by the urging force of the second torsion coil spring 30 and displaced to the block position. Thereby, the pressed surface 132 of the fork 13 and the stopper surface 151 of the pole 15 are engaged. Thus, the pole 15 at the block position blocks the fork 13 from swinging in the first direction D1. That is, the pole 15 in the block position blocks the fork 13 in the latch position from being displaced to the unlatched position. For this reason, the fork 13 maintains the latch position and maintains the state in which the striker 3 is held in the entrances 112 and 119. Thus, the locking device 1 is in the locked state, and is fixed to the vehicle body 9 with the seat back 6 raised as shown in FIG. As a result, the occupant can sit on the seat 5.

  Here, as shown in FIG. 13, when the pole 15 is displaced to the block position, the convex portion 152 does not press the pressed portion 173. For this reason, the pressing lever 17 is allowed to swing in the fifth direction D5 around the pressing lever axis X3 and be displaced to the pressing position by the biasing force of the third torsion coil spring 31. When the pressing lever 17 is displaced to the pressing position, the pressing surface 172 approaches the pressed surface 132 of the fork 13. At this time, the pressing lever 17 contacts the pressed surface 132 that is engaged with the stopper surface 151. For this reason, when the fork 13 is in the latched position, the pressing lever 17 stops slightly swinging in the fifth direction D5.

  In this locking device 1, when the occupant seated on the seat 5 changes its posture, for example, leans against the seat back 6, the seat back 6 is pressed by the occupant while being fixed to the vehicle body 9. Displace. Thereby, in the locking device 1 in the locked state, as shown in FIG. 14, the fork 13 further swings around the fork axis X <b> 1 in the second direction D <b> 2 while holding the striker 3. For this reason, the fork 13 is displaced to the overrun position beyond the latch position, and holds the striker 3 at the overrun position. Then, when the fork 13 is displaced to the overrun position, the pressed surface 132 and the stopper surface 151 are separated from each other. Even in this case, since the pole 15 is in the block position, even if the pressed surface 132 and the stopper surface 151 are separated from each other, the fork 13 is not displaced to the unlatched position.

  Thus, when the fork 13 is displaced to the overrun position and the pressed surface 132 and the stopper surface 151 are separated from each other, the pressing lever 17 is swung in the fifth direction D5 and displaced to the pressing position. As a result, the pressing surface 172 of the pressing lever 17 contacts the pressed surface 132 that is separated from the stopper surface 151 and presses the pressed surface 132 in the second direction D2. Thus, the pressing lever 17 presses the fork 13 to the overrun position.

  Moreover, in this locking device 1, when the fork 13 is displaced to the overrun position, in the first hollow portion 134 of the fork 13, the first deformation portion 134B comes into contact with the wall portion 111 of the base plate 11A. At this time, the first deformation portion 134B is elastically deformed to buffer an impact when it comes into contact with the wall portion 111. In the fork 13, the first support surface 137 is also in contact with the wall 111 while the first deformation portion 134 </ b> B is elastically deformed. In this way, the displacement of the fork 13 toward the overrun position is restricted by the first housing 11 by the first hollow portion 134 and the first support surface 137.

On the other hand, in the lock device 1, as shown in FIG. 1, in a state where the seat back 6 is fixed to the vehicle body 9, an occupant or the like operates a lock release switch (not shown) provided in the vehicle, thereby Supplies electric power to the motor 35 shown in FIG. 11, and operates the electric actuator 1B. The motor 35 fed by the control device operates to drive the worm gear 37 to rotate. Therefore, the worm wheel 39 meshing with the worm gear 37 rotates in the eighth direction D8 around the rotation axis X5 while resisting the urging force of the fourth torsion coil spring 43.

  Accordingly, the cam portion 39B of the worm wheel 39 pushes the pressed protrusion 155 of the pole 15 upward through the pressing portion 391. Therefore, as shown in FIGS. 11 and 12, the pole 15 swings in the fourth direction D4 around the pole axis X2 against the urging force of the second coil spring 30, and is displaced to the unblock position. To do. As described above, when the pole 15 is displaced to the unblocked position, the pressing lever 17 is displaced to the separated position. Thereby, the pressing surface 172 and the pressed surface 132 are separated from each other, and the pressing lever 17 releases the pressing of the fork 13 to the overrun position.

  Further, when the pole 15 is displaced to the unblocked position, the connecting rod 27 is pulled up as shown by the white arrow in FIG. Accordingly, the unlocking knob 68N shown in FIGS. 1 and 2 is pulled up through the connecting rod 27. The worm wheel 39 rotated in the eighth direction D8 is in contact with a stopper portion (not shown) provided in the second housing 33, so that the rotation range in the eighth direction D8 side is restricted.

  As shown in FIG. 12, when the pole 15 is displaced to the unblocked position, the stopper surface 151 is not engaged with the pressed surface 132. For this reason, the fork 13 is displaced to the unlatched position by the urging force of the first torsion coil spring 29. For this reason, the locking device 1 is unlocked, and the fixation between the seat back 6 and the vehicle body 9 is released. Thereby, the striker 3 can be separated from the entrances 112 and 119. Then, when the seat back 6 is tilted forward, the striker 3 is detached from the entrances 112 and 119.

Here, after supplying power to the motor 35, the control device ends power supply to the motor 35 when a certain period of time elapses. As a result, the rotation of the worm gear 37 is stopped, and the worm wheel 39 is rotated in the seventh direction D7 by the urging force of the fourth torsion coil spring 43 as shown in FIG. For this reason, the cam portion 39B of the worm wheel 39 releases the upward push of the pole. Thereby, the pole 15 is swung in the third direction D3 around the pole axis X2 by the urging force of the second coil spring 30, and is displaced to the block position.

  Further, in this locking device 1, when an occupant or the like performs an operation of directly pulling up the unlocking knob 68N shown in FIGS. 1 and 2, the connecting rod 27 is lifted as shown by a white arrow in FIG. It is done. For this reason, the pole 15 is pulled up through the rod clip 25. As a result, similarly to the case where the electric actuator 1B is operated, the pole 15 swings in the fourth direction D4 around the pole axis X2 against the urging force of the second coil spring 30 to the unblocked position. Displace. Then, the fork 13 is displaced to the unlatched position. As described above, in the locking device 1, the seat back 6 and the vehicle body 9 can be unlocked by being unlocked without depending on the operation of the electric actuator 1 </ b> B.

  Thus, in the locking device 1 according to the embodiment, the fork 13 includes the metal fork main body 13A and the elastomer covering portion 13B. This coating | coated part 13B has the 1st hollow part 134 formed in hollow shape. That is, the fork 13 integrally includes the first hollow portion 134. The first hollow portion 134 elastically supports the fork 13 at the overrun position with respect to the wall portion 111 between the fork 13 and the wall portion 111 of the first housing 11. As a result, in the locking device 1, the wall portion 111, that is, the first housing 11, regulates the swing of the fork 13 when displacing in the second direction D <b> 2 side, that is, the overrun position side.

  Here, in this locking device, as shown in FIG. 14, the back ends 112A and 119A of the entrances 112 and 119 are located behind the position of the striker 3 when the fork 13 holds the striker 3 in the overrun position. Is located. That is, the entrances 112 and 119 are formed deeper in the depth direction than the striker 3 held by the fork 13 at the overrun position. For this reason, in this locking device 1, even if the fork 13 swings to the overrun position side, the striker 3 held by the fork 13 does not contact the back ends 112A and 119A of the entrances 112 and 119.

  Thus, in this locking device, when restricting the swing of the fork 13 when displacing to the overrun position side, the striker 3 is moved to the rear ends 112A and 119A of the entrances 112 and 119 as in the conventional locking device. There is no need to abut. For this reason, in this locking device 1, the striker 3 does not generate abnormal noise due to the abutment with the back ends 112A, 119A of the entrances 112, 119. Further, since the first hollow portion 134 is hollow by the first through hole 134A, the first deformation portion 134B is easily elastically deformed when the fork 13 at the overrun position is supported. As a result, the first deformation portion 134B, and thus the first hollow portion 134, can suitably buffer the impact when the fork 13 in the overrun position contacts the wall portion 111. For this reason, in this locking device 1, it is difficult for noise generated by the fork 13 in the overrun position to come into contact with the wall portion 111.

  Therefore, the vehicle locking device 1 according to the embodiment exhibits excellent quietness even when the fork 13 is displaced to the overrun position.

  Moreover, in this locking device, since the coating | coated part 13B has the 2nd hollow part 135, the fork 13 also has the 2nd hollow part 135 integrally. The second hollow portion 135 elastically supports the fork 13 in the unlatched position with respect to the wall portion 111 between the fork 13 and the wall portion 111. Thereby, in this locking device 1, the swing of the fork 13 when it is displaced in the first direction D <b> 1 side, that is, the unlatched position side is also restricted by the first housing 11. Here, as with the first hollow portion 134, the second hollow portion 135 is also hollowed by the second through-hole 135A, so that when the fork 13 at the unlatched position is supported, the second deformation portion 135B is elastically deformed. It is easy to do. As a result, the second deformation portion 135 </ b> B, and thus the second hollow portion 135, can suitably buffer an impact when the fork 13 in the unlatched position comes into contact with the wall portion 111. For this reason, in this locking device 1, it is difficult for noise generated by the fork 13 in the unlatched position to come into contact with the wall portion 111. Thereby, this locking device 1 exhibits excellent silence even when the fork 13 is displaced to the unlatched position.

  In particular, in the locking device 1, since the fork 13 integrally includes the first hollow portion 134 and the second hollow portion 135, the fork 13 in the overrun position or the fork 13 in the unlatched position is attached to the wall portion 111. On the other hand, it is not necessary to provide a dedicated member separately from the fork 13 and the first housing 11 for elastic support. For this reason, in this locking device 1, the increase in a number of parts can be suppressed and manufacture can be facilitated. In addition, the first and second hollow portions 134 and 135 can be easily provided on the fork 13 by forming the first and second hollow portions 134 and 135 in the covering portion 13B.

  In this locking device 1, when the fork 13 is displaced from the latch position to the overrun position, the pressing surface 172 of the pressing lever 17 presses the pressed surface 132 of the fork 13 at the overrun position. As a result, the fork 13 at the overrun position is restricted from being displaced to the latch position, and the pressed surface 132 and the stopper surface 151 are kept apart. As a result, in this locking device 1, even when the occupant seated on the seat 5 changes its posture, the fork 13 and the pole 15, more specifically, the pressed surface 132 and the stopper surface 151 are in contact with each other. And generation | occurrence | production of the noise by repeating non-contact can be prevented.

  Furthermore, in this locking device 1, the covering portion 13B also has a third hollow portion 136 formed in a hollow shape. The third hollow portion 136 comes into contact with the striker 3 when the seat back 6 is fixed to the vehicle body 9. Here, since the third hollow portion 136 is also hollow by the third through hole 136A, the third deformation portion 136B is easily elastically deformed when coming into contact with the striker 3. Thereby, the 3rd deformation part 136B and by extension, the 3rd hollow part 136 can buffer appropriately the impact at the time of striker 3 and fork 13 contacting.

  Thus, in this locking device 1, since the fork 13 also has the third hollow portion 136, when the seat back 6 is fixed to the vehicle body 9, abnormal noise due to contact between the striker 3 and the fork 13 is also generated. It is hard to occur.

  The covering portion 13B has a clamping portion 139. The length L1 in the width direction of the sandwiching portion 139 is shorter than the length L2 of the diameter of the striker 3. For this reason, when the striker 3 is clamped, the clamping part 139 is elastically deformed, so that the fork 13 holds the striker 3 in the entrances 112 and 119 while restraining it. For this reason, in this locking device 1, when the fork 13 holds the striker 3 in the latch position or the overrun position, rattling between the fork 13 and the striker 3 can be suppressed, and abnormal noise occurs between the two. Has also been prevented. Also in these points, this locking device 1 is excellent in quietness. Further, by forming the third hollow portion 136 and the sandwiching portion 139 in the covering portion 13B, the third hollow portion 136 and the sandwiching portion 139 can be easily provided on the fork 13.

  In this locking device 1, the pole support shaft 21 and the pressing lever support shaft 23 are separate bodies, and the pole shaft center X2 and the pressing lever shaft center X3 are separated from each other. The pressing lever 17 is supported only on the cover plate 11 </ b> B through the pressing lever support shaft 23. Thereby, in this locking device 1, for example, the pole 15 and the pressing lever 17 are arranged coaxially and supported by the first housing 11, or the pressing lever 17 is supported by the base plate 11A and the cover plate 11B. In comparison, the pressure lever 17 can be reliably swung without being affected by the swing of the pole 15. For this reason, the pressing lever 17 can suitably press the fork 13 to the overrun position. Further, the pressing lever 17 does not hinder the stopper surface 151 and the pressed surface 132 from being engaged. In the pole 15 in the block position, the pressed surface 132 of the fork 13 in which the stopper surface 151 is in the latched position. And can be reliably engaged.

  Further, the pole shaft center X2 and the pressing lever shaft center X3 are separated from each other and the pressing lever 17 is supported only by the cover plate 11B. It can be increased.

  Further, in this locking device 1, the fork support shaft 19 is disposed below the entrances 112 and 119, and the pole support shaft 21 and the pressing lever support shaft 23 are disposed above the entrances 112 and 119. Thereby, the fork shaft center X1 is located on the opposite side to the pole shaft center X2 and the pressing lever shaft center X3 across the entrances 112 and 119. Thereby, for example, the lock device 1 can be reduced in size as compared with the configuration in which the fork shaft center X1, the pole shaft center X2, and the pressing lever shaft center X3 are all arranged above and below the entrances 112 and 119. Is possible.

  The pressing lever axis X3 is located on the pole axis X2 side with respect to the position of the pressed surface 132 when the fork 13 is in the latch position. For this reason, by arranging the pole axis X2 and the pressing lever axis X3 close to each other, in this locking device 1, the pressed surface 132 also contacts the contact surface 151 of the pole 15 in the block position. Can also serve as a latch surface. For this reason, also in this respect, the locking device 1 can be reduced in size.

  Furthermore, the pressed surface 132 is formed on the metal fork main body 13A and exposed from the covering portion 13B. For this reason, in this locking device 1, the pressed surface 132 is suitably engaged with the stopper surface 151 and is suitably pressed by the pressing surface 172. Thereby, the pole 15 in the block position can preferably block the fork 13 from being displaced to the unblock position, and the pressing lever 17 can suitably press the fork 13 to the overrun position. .

  In addition, since the lock device 1 includes the electric actuator 1B, an occupant or the like can release the fixation between the seat back 6 and the vehicle body 9 even from a position remote from the seat 5 or the seat back 6. Convenience is getting higher. Here, in this locking device 1, the first housing 11 of the locking device main body 1A and the second housing 33 of the electric actuator 1B are fixed in a substantially orthogonal state. For this reason, compared with the structure where the 1st housing 11 and the 2nd housing 33 are arrange | positioned and fixed in parallel with the front-back direction, it can suppress that the locking device 1 enlarges in the front-back direction. For this reason, in this locking device 1, even if it has the electric actuator 1B, it can suppress that it enlarges, and it is hard to influence the shape of the seat back 6. FIG.

  While the present invention has been described with reference to the embodiments, it is needless to say that the present invention is not limited to the above-described embodiments and can be appropriately modified and applied without departing from the spirit thereof.

  For example, the movable body is not limited to the seat back 6, and may be a seat cushion 5A that constitutes a seating surface. As a specific example, a slide rail or a plurality of attachment portions are provided in the vehicle body 9, and the seat cushion 5A is guided by the slide rail or attached to any one of the plurality of attachment portions. The vehicle body 9 is movably supported. In the vehicle body 9, a plurality of strikers 3 are arranged side by side on slide rails or a plurality of attachment portions. The locking device of the present invention is provided on the seat cushion 5A, and holds the seat cushion 5A to the vehicle body by holding any one of the plurality of strikers 3 to be in a locked state.

  Further, the locking device 1 may be configured by only the locking device main body 1A. In this case, the lock device 1 can be further reduced in size and can be employed for the seats 5 having more shapes. Moreover, manufacture can be made easier.

  Further, the pressing lever 17 may be supported by the base plate 11 or may be supported by the base plate 11 and the cover plate 11B. Further, the pressing lever 17 may be supported by the pole 15. Further, the pole 15 and the pressing lever 17 may be coaxially supported by the first housing 11.

The covering portion 13B may be configured without the second support surface 138.

Further, the covering portion 13B is without a second hollow portion 135 may be a covering portion 13B itself as that put the present invention, "the second elastic means."

Further, in the locking device 1, although the fork 13 has integrally a second elastic means is not limited thereto, the first housing 11 may be a second elastic means configured to have integrally.

  Further, in this locking device 1, the pressed surface 132 of the fork 13 abuts on the pressing surface 172 of the pressing lever 17 and can also abut on the abutting surface 151 of the pole 15 at the block position. Also serves as. However, the present invention is not limited to this, and the fork 13 may have the pressed surface 132 and the latch surface separately.

  The present invention is applicable to vehicles such as automobiles, buses, and industrial vehicles.

DESCRIPTION OF SYMBOLS 1 ... Locking device 3 ... Striker 5 ... Seat 6 ... Seat back (movable body)
9 ... car body 11 ... first housing (housing)
DESCRIPTION OF SYMBOLS 13 ... Fork 13A ... Fork main body 13B ... Covering part 15 ... Pole 134 ... 1st hollow part (1st elastic means)
135: second hollow portion (second elastic means)
X1 ... Fork axis X2 ... Pole axis

Claims (4)

A vehicle seat locking device for fixing a movable body constituting at least a part of a seat to a vehicle body,
A housing provided with one of the movable body and the vehicle body, and having an entrance through which a striker provided on the other of the movable body and the vehicle body can enter;
A fork that is supported by the housing so as to be able to swing around a fork axis, and that is displaced into a latch position that holds the striker in the advance port, and an unlatch position that allows the striker to move away from the advance port;
A block position which is supported by the housing so as to be swingable around a pole axis and blocks the fork from being displaced from the latch position to the unlatching position; and the fork is displaced from the latch position to the unlatching position. And a pole that is displaced to an unblocked position that allows
In the locking device, the fork is displaceable from the unlatched position to an overrun position that exceeds the latched position and positions the striker in the depth direction of the entrance.
Before SL fork has a first resilient means for resiliently supported with respect to the housing the fork by the overrun position integrally,
The fork is composed of a metal fork main body, and an elastic resin covering portion as the first elastic means for covering the fork main body,
The covering portion has a first hollow portion formed in a hollow shape, and a support surface that is located in the vicinity of the first hollow portion and is formed flat in the thickness direction of the fork,
The first hollow portion includes a first through hole and a first deformation portion that is located outside the first through hole and extends along the first through hole,
The vehicle fork locking device according to claim 1, wherein the support surface comes into contact with the housing while the first deformation portion is deformed with respect to the housing at the overrun position . Before SL fork further includes integrally a second resilient means for resiliently supported with respect to said housing said fork by said unlatched position,
The covering portion is the second elastic means;
The covering portion seat locking device according to claim 1, further comprising a second hollow portion formed in a hollow shape. The fork main body has a pressed surface exposed from the covering portion,
The locking device further includes a pressing lever supported by the housing or the pole so as to be swingable around a parallel pressing lever axis while being spaced apart from the pole axis, and having a pressing surface capable of pressing the pressed surface. Prepared,
3. The vehicle seat according to claim 1, wherein when the fork is moved from the latch position to the overrun position, the pressing lever presses the pressed surface by the pressing surface and holds the striker with the fork. Locking device. The entrance extends substantially parallel to a straight line connecting the pole axis and the pressing lever axis, opens on the pole axis side, and the back end is located on the pressing lever axis side,
4. The vehicle seat locking device according to claim 3, wherein the fork axis is located on the opposite side of the pole axis and the pressing lever axis across the entrance.

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