JP2019172119A - Lock device of vehicle seat - Google Patents

Abstract

To provide a small-sized light-weight lock device of a vehicle seat in which a seatback and the lock device are interlocked with each other, and which can maintain a lock state even if the seatback is in a folded position.SOLUTION: A lock device comprises a striker 8 and a lock mechanism 10. The lock mechanism 10 comprises: a first lock mechanism 101 having a first base plate 11, a hook 12, a pole 13 and a first release lever 14; and a second lock mechanism 102 having a second base plate 15, a second release lever 16 and an operation lever 17. A connecting hook 18 which is engaged with an engagement pin 17a1 of the operation level 17, and can turn integrally with the operation lever 17 is pivoted to the second release lever 16 so as to be turnable. When the second lever 16 is turned in a state that a part of a portion engaged with the engagement pin 17a1 of the connecting hook 18 abuts on a pin 15a1, the engagement of the connecting hook 18 and the engagement pin 17a1 is released.SELECTED DRAWING: Figure 7

Description

  The present invention relates to a vehicle seat locking device.

  Conventionally, in an automobile seat, a seat back is rotatably attached to the seat cushion, and the entire seat can be flipped up substantially vertically with respect to the floor in a state where the seat back is stacked on the seat cushion. There is something. In such a vehicle seat, the seat is fixed to the floor by engaging a striker disposed on the floor with a lock mechanism disposed on the bottom surface of the seat cushion. This locking mechanism is locked at the standing position where the seat back stands up with respect to the seat cushion and the occupant can be seated by the lock operation mechanism, and is unlocked at the folding position overlapped with the seat cushion. It is comprised so that it may become. Furthermore, the lock mechanism allows the vehicle seat to be locked with respect to the floor even when the seat back is in the folded position by the lock operation mechanism, so that the stability of the traveling seat can be ensured. It has become. The striker, the lock mechanism, and the lock operation mechanism constitute a lock device.

  As shown in FIG. 30, the lock device 100 includes a pair of left and right lock mechanisms 200 disposed on the rear bottom surface of the seat cushion, and a lock operation mechanism disposed on the front bottom surface of the seat cushion that operates the lock mechanism 200. 300. The lock mechanism 200 includes a base plate 210, a hook 220, a pole 230, and a lever 240. The base plate 210 has a recess 211 that can receive the striker 400 disposed on the floor. The hook 220 is supported so as to be rotatable about the hook shaft 221 with respect to the base plate 210, and can be brought into a locked state in which the striker 400 is pressed against the upper edge of the recess 211 by the jaw 222. Yes. The pole 230 is supported so as to be rotatable about the pole shaft 231 with respect to the base plate 210, and the hook engaging portion 232 is engaged with the locked hook 220 so that the rotation of the hook 220 can be stopped. It has become. The lever 240 is supported so as to be rotatable about the pole shaft 231 integrally with the pole 230 with respect to the base plate 210, and one end of the first cable 250 is attached to the end opposite to the pole shaft 231. . An urging spring (not shown) is disposed between the hook 220 and the pole 230. In FIG. 30, the hook 220 is urged to rotate counterclockwise about the hook shaft 221. The pole 230 is biased to rotate clockwise about the pole shaft 231.

  As illustrated in FIG. 30, the lock operation mechanism 300 includes a substrate 310, a first link 320, a second link 330, and a connecting arm 340. The substrate 310 is provided with an arm contact portion 311 at one end thereof. The first link 320 is supported so as to be rotatable about the link shaft 321 with respect to the substrate 310, and includes a first arm portion 322 extending from the link shaft 321 in the radial direction and a second arm portion 323. The other end of the first cable 250 is attached to the end of the first arm 322 opposite to the link shaft 321. Note that the other ends of the first cables 250 of the left and right lock mechanisms 200 are each attached to the end of the first arm 322 opposite to the link shaft 321. An arm shaft 341 that rotatably supports the connecting arm 340 is provided at the end of the second arm portion 323 opposite to the link shaft 321. The second link 330 is supported so as to be rotatable about the link shaft 321 with respect to the substrate 310, and includes a first arm portion 331 and a second arm portion 332 extending in the radial direction from the link shaft 321. An arm engagement pin 331a is disposed at the end of the first arm portion 331 opposite to the link shaft 321. One end of the second cable 350 is attached to the end of the second arm 332 opposite to the link shaft 321. The connecting arm 340 includes a hook portion 342 extending in the radial direction from the arm shaft 341 and a base abutting portion 343. The hook portion 342 can be engaged with the arm engagement pin 331a at its jaw portion. The base contact portion 343 can contact the arm contact portion 311. The first link 320 is urged to rotate counterclockwise about the link shaft 321 in FIG. In FIG. 30, the second link 330 is urged to rotate counterclockwise about the link shaft 321 to stop the rotation. In FIG. 30, the connecting arm 340 is urged to rotate clockwise about the arm shaft 341, and the hook portion 342 engages with the arm engagement pin 331a to stop the rotation. The other end portion of the second cable 350 is attached to one end portion separated from the reclining shaft 380 of the ring plate 371 attached to the seat back frame 370 that rotates about the reclining shaft 380 with respect to the seat cushion frame 360. ing.

  The operation of the locking device 100 will be described. When the seat back frame 370 is lowered with respect to the seat cushion frame 360 as shown in FIG. 31 from the locked state shown in FIG. 30, the second cable 350 is pulled, so that the second link 330 moves the link shaft 321. It rotates clockwise in FIG. 31 about the center. Accordingly, since the hook portion 342 of the connecting arm 340 is engaged with the arm engagement pin 331a, the first link 320 is also rotated clockwise in FIG. 31 about the link shaft 321. Thus, when the first cable 250 is pulled, the lever 240 and the pole 230 of the locking mechanism 200 are rotated counterclockwise in FIG. 31 to disengage the pole 230 and the hook 220, and the hook 220 is moved to the hook shaft. It rotates counterclockwise in FIG. Then, the locked state in which the jaw portion 222 of the hook 220 presses the striker 400 against the upper end edge of the recess 211 is released to enter the unlocked state. Further, when the seat back frame 370 is lowered with respect to the seat cushion frame 360, the base contact portion 343 of the connection arm 340 contacts the arm contact portion 311 of the substrate 310, and the connection arm 340 is shown in FIG. It rotates counterclockwise around the arm shaft 341. Then, as shown in FIG. 32, the hook portion 342 of the connecting arm 340 is disengaged from the arm engaging pin 331a, and the first link 320 is rotated counterclockwise in FIG. 32 about the link shaft 321. The lever 240 and the pole 230 of the locking mechanism 200 are not pulled by the first cable 250. When the concave portion 211 of the base plate 210 is pressed against the striker 400 in the state shown in FIG. 32, the lock mechanism 200 enters a locked state. Patent Document 1 discloses a vehicle seat locking device similar to the locking device 100 described above.

Japanese Patent Application Laid-Open No. 2007-199671

  In the above-described automobile seat locking device, the connecting arm 340 in the lock operation mechanism 300 includes the hook portion 342 and the base contact portion 343. That is, as the first link 320 rotates, a portion that contacts the arm contact portion 311 of the substrate 310 and rotates the connecting arm 340 around the arm shaft 341 and a hook that engages the arm engagement pin 331a. The part 342 is provided as a separate part. As a result, the connecting arm 340 may become large and hinder weight reduction.

  In view of such problems, an object of the present invention is to provide a compact and lightweight vehicle seat that can maintain a locked state even when the seat back and the locking device are interlocked and the seat back is in a folded position with respect to the seat cushion. It is to provide a locking device.

  According to a first aspect of the present invention, there is provided a vehicle seat comprising: a seat cushion; and a seat back that is rotatably mounted between a standing position that stands up with respect to the seat cushion and a folded position that is overlapped. A vehicle seat locking device capable of holding the vehicle body, the vehicle seat locking device comprising: a striker provided on one of the vehicle body and the vehicle seat; and the vehicle seat. A locking mechanism provided on the other side of the vehicle body, the locking mechanism being pivotally supported by a first base plate having a recess capable of receiving the striker, and pivotable by a hook shaft with respect to the first base plate. The striker is pushed by the movement into the recess and is rotated so that the striker is clamped between the end edge of the recess and the striker is not sandwiched. A hook that can form an unlocked state and is urged to rotate in a direction to form the unlocked state, and is pivotally supported by a pole shaft with respect to the first base plate and engaged with the hook. A pole for holding the hook in the locked state, and the lock mechanism is pivotally supported by a second base plate and a release lever shaft with respect to the second base plate so as to be rotatable. A release lever having a connection hook pivotally supported by a connection hook shaft provided in parallel with the release lever shaft at a portion separated from the release lever shaft by rotating in conjunction with the release lever shaft; A connecting pin that is pivotally supported by a shaft and that can rotate together with the release lever by engaging the connecting hook. An operation lever that is connected to the seat back by a connecting member so as to rotate in conjunction with the rotation of the seat back relative to the seat cushion, and is the same as the release lever. The connecting hook is urged to rotate in a direction in which a pin engaging portion that engages with the connecting pin engages with the connecting pin, and the seat back is in the upright position. When the seat back is rotated to the folding position with the pole holding the hook in the locked state, the release lever is configured so that the pin engaging portion of the connecting hook is rotated by a biasing force. In a state where the operating lever is engaged with the connecting pin, the operating lever is rotated integrally with the operating lever in accordance with the movement of the operating lever in a direction against the rotation bias, and the pole is hooked. The hook is put in the unlocked state by rotating it in a direction to release the engagement with the pin, and when the operating lever is rotated by a predetermined angle, a part of the pin engaging portion of the connecting hook is brought into contact with the second base plate. Abutting on the disposed coupling hook abutting portion, the coupling hook is rotated in a direction to disengage from the coupling pin to disengage, and the release lever is returned to the locked position and the The hook is configured to allow the pole to engage with the hook by its urging force when the hook is turned into the locked state.

  According to the first aspect of the present invention, the connecting hook is supported by the connecting hook shaft so as to be rotatable with respect to the release lever, and the pin engaging portion is urged to rotate in a direction to engage the connecting pin. Then, when the operating lever is rotated by a predetermined angle, a part of the pin engaging portion of the connection hook comes into contact with the connection hook contact portion disposed on the second base plate, and the pin engagement portion and the connection pin are engaged. The connecting hook is rotated in the direction in which it is removed. As a result, it is not necessary to provide the connecting hook with a portion that contacts the connecting hook contact portion disposed on the second base plate other than the pin engaging portion, and the connecting hook can be reduced in size and weight, and the lock mechanism can be reduced in size and weight. Can be achieved. In addition, when the seat back is turned to the folding position from the locked state where the seat back is in the standing position and the hook holds the striker, the pole is rotated via the operation lever and the release lever to engage with the hook. Is released. As a result, the hook is unlocked by the rotational biasing force, and the vehicle seat can be separated from the vehicle body. When the lock mechanism is brought close to the striker while the seat back is held in the folded position, the hook is turned against the turning urging force by the striker to be locked, and the pole is turned by the release lever. By engaging with the hook, the locked state is maintained. That is, the vehicle seat can be locked with respect to the vehicle body while the seat back is held in the folded position, and the stability of the traveling seat can be ensured.

  According to a second aspect of the present invention, in the first aspect, the striker is provided in the vehicle body, the lock mechanism is provided in the vehicle seat, and the pole and the release lever are connected by a cable. And are configured to rotate in conjunction with each other.

  According to the second invention, a first base plate on which a hook and a pole are disposed and a second base plate on which a release lever and an operation lever are disposed are attached to the vehicle seat. It is connected so that it can be linked with a cable. This increases the degree of freedom in disposing the lock mechanism in the vehicle seat.

  According to a third aspect of the present invention, there is provided a vehicle seat comprising: a seat cushion; and a seat back that is rotatably mounted between a standing position that stands up with respect to the seat cushion and a folded position that overlaps the seat cushion. A vehicle seat locking device capable of holding the vehicle body, the vehicle seat locking device comprising: a striker provided on one of the vehicle body and the vehicle seat; and the vehicle seat. A lock mechanism provided on the other side of the vehicle body, the lock mechanism being supported by a base plate having a recess capable of receiving the striker, and pivotally supported by a hook shaft with respect to the base plate. The locked state in which the striker is clamped between the end edge of the recess and the unlocked state in which the striker is not clamped by being pushed by the movement entering the recess. A hook which is capable of forming a state and is urged to rotate in a direction to form the unlocked state, and is pivotally supported by a pole shaft with respect to the base plate so as to be rotatable. A pole that is held in the locked state, and is pivotally supported by a release lever shaft with respect to the base plate, and is rotated in conjunction with the pole and separated from the release lever shaft. A release lever having a connection hook pivotally supported by a connection hook shaft provided in parallel; and the release lever by being pivotally supported by the release lever shaft and engaging with the connection hook; An operation lever having a connecting pin that can rotate together, and either the pole or the release lever The protrusion provided is connected to and interlocked by being inserted into a hole provided on the other, and the operation lever is interlocked with the rotation of the seat back relative to the seat cushion. It is connected to the seat back by a connecting member so as to rotate, and is urged to rotate in the same direction as the release lever, and the connecting hook has a pin engaging portion that engages with the connecting pin. The seatback is biased in a direction to engage with a pin, and the seatback is rotated to the folding position while the seatback is in the standing position and the pole holds the hook in the locked state. The release lever is rotated in a direction against the rotation bias in a state where the pin engaging portion of the connection hook is engaged with the connection pin by a rotation biasing force. And the lever is rotated together with the operation lever to rotate the pole in a direction to disengage the hook from the hook so that the hook is in the unlocked state. When rotating, a part of the pin engaging portion of the connecting hook comes into contact with the connecting hook abutting portion disposed on the base plate, and the connecting hook is rotated in a direction to disengage the connecting pin. The release lever returns to the locked position and allows the pole to engage with the hook by its urging force when the hook is turned into the locked state. It is characterized by being comprised.

  According to the third aspect of the present invention, the connecting hook is supported by the connecting hook shaft so as to be rotatable with respect to the release lever, and the pin engaging portion is urged to rotate in a direction to engage the connecting pin. When the operating lever is rotated by a predetermined angle, a part of the pin engaging portion of the connecting hook comes into contact with the connecting hook contacting portion disposed on the base plate, and the engagement between the pin engaging portion and the connecting pin is released. The connecting hook rotates in the direction. As a result, it is not necessary to provide the connecting hook with a portion that contacts the connecting hook abutting portion disposed on the base plate other than the pin engaging portion, and the connecting hook can be reduced in size and weight, and the lock mechanism can be reduced in size and weight. Can be planned. The base plate is equipped with a hook, pole, release lever, and operation lever, and can be interlocked with the protrusion provided on one of the pole and release lever being inserted into the hole provided on the other It is connected to. As a result, the structure of the locking mechanism in the vehicle seat can be simplified and further lightened. In addition, when the seat back is turned to the folding position from the locked state where the seat back is in the standing position and the hook holds the striker, the pole is rotated via the operation lever and the release lever to engage with the hook. Is released. As a result, the hook is unlocked by the rotational biasing force, and the vehicle seat can be separated from the vehicle body. When the lock mechanism is brought close to the striker while the seat back is held in the folded position, the hook is turned against the turning urging force by the striker to be locked, and the pole is turned by the release lever. By engaging with the hook, the locked state is maintained. That is, the vehicle seat can be locked with respect to the vehicle body while the seat back is held in the folded position, and the stability of the traveling seat can be ensured.

It is a perspective view of the use condition of the car seat to which the locking device of a 1st embodiment of the present invention was attached. It is a side view when a seat back exists in an upright position in a car seat of the above-mentioned embodiment. It is a side view when a seat back is in a folding position in a car seat of the above-mentioned embodiment. It is a side view when the seat back is flipped up in the folding position in the automobile seat of the embodiment. It is a side view when a seat back is made into a folding position in the car seat of the above-mentioned embodiment, and it is in a locked state. It is a side view when a seat back is returned to an upright position in a car seat of the above-mentioned embodiment. It is a figure explaining the operating condition of the lock mechanism of the said embodiment. FIG. 3 is a diagram corresponding to the state of FIG. 2. It is a figure explaining the operating condition of the lock mechanism of the said embodiment. It is a figure corresponding to the state which transfers to the state of FIG. 3 from the state of FIG. It is a figure explaining the operating condition of the lock mechanism of the said embodiment. It is a figure corresponding to the state which transfers to the state of FIG. 3 from the state of FIG. It is a figure explaining the operating condition of the lock mechanism of the said embodiment. It is a figure corresponding to the state which transfers to the state of FIG. 3 from the state of FIG. It is a figure explaining the operating condition of the lock mechanism of the said embodiment. It is a figure corresponding to the state of FIG.3 and FIG.4. It is a figure explaining the operating condition of the lock mechanism of the said embodiment. It is a figure corresponding to the state of FIG. It is a figure explaining the operating condition of the lock mechanism of the said embodiment. It is a figure corresponding to the state which transfers to the state of FIG. 6 from the state of FIG. It is a figure explaining the operating condition of the lock mechanism of the said embodiment. It is a figure corresponding to the state which transfers to the state of FIG. 6 from the state of FIG. It is a disassembled perspective view of the locking mechanism in the locking device of 2nd Embodiment of this invention. FIG. 16 is a perspective view of a state in which the lock mechanism of FIG. 15 is assembled. The base plate on the front side is omitted. It is a figure explaining the operating condition of the lock mechanism of the said embodiment. FIG. 3 is a diagram corresponding to the state of FIG. 2. It is a figure of the outer part of two baseplates. It is a figure explaining the operating condition of the lock mechanism of the said embodiment. FIG. 3 is a diagram corresponding to the state of FIG. 2. It is a figure of the inner part of two baseplates. It is a figure explaining the operating condition of the lock mechanism of the said embodiment. It is a figure corresponding to the state which transfers to the state of FIG. 3 from the state of FIG. It is a figure of the outer part of two baseplates. It is a figure explaining the operating condition of the lock mechanism of the said embodiment. It is a figure corresponding to the state which transfers to the state of FIG. 3 from the state of FIG. It is a figure of the inner part of two baseplates. It is a figure explaining the operating condition of the lock mechanism of the said embodiment. It is a figure corresponding to the state which transfers to the state of FIG. 3 from the state of FIG. It is a figure of the outer part of two baseplates. It is a figure explaining the operating condition of the lock mechanism of the said embodiment. It is a figure corresponding to the state which transfers to the state of FIG. 3 from the state of FIG. It is a figure of the inner part of two baseplates. It is a figure explaining the operating condition of the lock mechanism of the said embodiment. It is a figure corresponding to the state of FIG.3 and FIG.4. It is a figure of the outer part of two baseplates. It is a figure explaining the operating condition of the lock mechanism of the said embodiment. It is a figure corresponding to the state of FIG.3 and FIG.4. It is a figure of the inner part of two baseplates. It is a figure explaining the operating condition of the lock mechanism of the said embodiment. It is a figure corresponding to the state of FIG. It is a figure of the outer part of two baseplates. It is a figure explaining the operating condition of the lock mechanism of the said embodiment. It is a figure corresponding to the state of FIG. It is a figure of the inner part of two baseplates. It is a figure explaining the operating condition of the lock mechanism of the said embodiment. It is a figure corresponding to the state which transfers to the state of FIG. 6 from the state of FIG. It is a figure of the outer part of two baseplates. It is a figure explaining the operating condition of the lock mechanism of the said embodiment. It is a figure corresponding to the state which transfers to the state of FIG. 6 from the state of FIG. It is a figure of the inner part of two baseplates. It is XXIX-XXIX arrow directional cross-sectional view of FIG. It is a figure explaining a prior art. It is a figure explaining a prior art. It is a figure explaining a prior art.

  1 to 14 show a first embodiment of the present invention. This embodiment is an example in which the present invention is applied to an automobile seat 1. In each figure, each direction of the automobile and the automobile seat 1 when the automobile seat 1 is attached to the floor FL of the automobile is shown by arrows. In the following description, the description regarding the direction is made based on this direction. Here, the vehicle seat 1 and the floor FL correspond to “vehicle seat” and “vehicle body” in the claims, respectively.

  FIG. 1 shows an automobile seat 1 in a use state in which a passenger is seated to which a vehicle seat locking device according to a first embodiment of the present invention is applied. The vehicle seat 1 includes a seat cushion 2 and a seat back 3 attached to the rear end portion of the seat cushion 2 so as to be rotatable around a reclining shaft RP extending in the left-right direction (front and back direction of the paper surface). . A front end portion side of the cushion frame 4 in the seat cushion 2 is rotatably attached to a bracket 5 fixed to the floor FL by a turning shaft 6 extending in the left-right direction. The rear end portion side of the cushion frame 4 is attached to the lower end portion side of the back frame 9 in the seat back 3 so as to be rotatable by a reclining shaft RP extending in the left-right direction. The lock device 7 is disposed between the lower part of the cushion frame 4 at the rear end side and the floor FL so that the vehicle seat 1 can be locked and unlocked with respect to the floor FL. The lock device 7 includes a lock mechanism 10 attached to the lower portion of the cushion frame 4 on the rear end side, and a striker 8 (see FIG. 2) fixed to the floor FL. In addition, the connection part by the rotating shaft 6 and the locking device 7 are disposed on the left and right sides of the vehicle seat 1. Here, the locking device 7 corresponds to the “vehicle seat locking device” in the claims.

  2-6 is a side view which shows typically the operation | movement condition of the vehicle seat 1. FIG. As shown in FIG. 2, the lock device 7 is in a locked state when the seat back 3 is in the upright position with respect to the seat cushion 2. As shown in FIG. 3, when the seat back 3 is brought into the folded position where the seat back 3 is folded down on the seat cushion 2, the locking device 7 is unlocked. As shown in FIG. 4, when the seat back 3 is folded with respect to the seat cushion 2 and the rear side of the seat cushion 2 is lifted upward about the rotation shaft 6, the vehicle seat 1 is lifted with respect to the floor FL. It is in the retracted state where it is flipped forward. As shown in FIG. 5, when the automobile seat 1 in the retracted state is lowered rearward about the rotation shaft 6, the lock device 7 returns to the locked state. As shown in FIG. 6, when the seat back 3 is returned to the standing position with respect to the seat cushion 2, the initial state shown in FIG. 2 is restored. Details of the operation of the locking device 7 in the operation of the seat cushion 2 and the seat back 3 will be described later.

  1 to 14 show a locking device 7 according to a first embodiment of the present invention. The lock device 7 includes a lock mechanism 10 and a striker 8. The lock mechanism 10 includes a pair of left and right first lock mechanisms 101 attached to the lower part on the rear end side of the cushion frame 4 and a second lock mechanism 102 attached to the lower part on the front end part side of the cushion frame 4. The pair of left and right first lock mechanisms 101 and the second lock mechanism 102 are connected by a first cable 103, and the second lock mechanism 102 and the back frame 9 are connected by a second cable 104. . The first lock mechanism 101 and the second lock mechanism 102 correspond to a “lock mechanism” in the claims.

  As shown in FIG. 7, the first lock mechanism 101 includes a first base plate 11, a hook 12 attached to the first base plate 11, a pole 13, and a first release lever 14. The first base plate 11 is formed by assembling two plates having substantially the same shape to face each other with a space therebetween. An upper portion of the first base plate 11 is provided with an attachment hole 11a through which a bolt for attachment to the cushion frame 4 is passed. A recess 11b is provided. In addition, a fixing portion 11c for fixing the outer pipe of the first cable 103, a stopper portion 11d of the hook 12, and a stopper portion 11e of the release lever 14 are formed on one of the two plates in a standing wall shape. Yes. The first base plate 11 includes a hook shaft 12P in which the two plates rotatably support the hook 12, and a pole shaft 13P in which the pole 13 and the first release lever 14 are rotatably supported. In addition, a space for arranging the pole 13 and the first release lever 14 is provided and connected.

  As shown in FIG. 7, the hook 12 is a plate-like member and is attached to the first base plate 11 so as to be rotatable around the hook shaft 12P. The hook 12 includes a hook portion 12a that opens toward the front upper side in a side view. A front projecting portion 12b projecting forward is provided at the upper end portion of the hook 12, and the lower surface side of the front projecting portion 12b is a pole member that can be engaged with a hook engaging surface portion 13a of a pole 13 described later. It is formed as a mating surface portion 12b1. At the upper end portion of the hook 12, there is provided a spring locking portion 12 c that protrudes upward and can lock the rear end portion of the urging spring S disposed between the hook 13. By the action of the urging spring S, the hook 12 is urged to rotate counterclockwise about the hook shaft 12P in FIG. By the rotation of the hook 12, the hook portion 12 a can be engaged with or released from the striker 8 received in the concave portion 11 b of the first base plate 11. As shown in FIG. 7, when the hook portion 12a is engaged with the striker 8, the striker 8 is sandwiched between the hook portion 12a and the upper end edge of the recess 11b to be in a locked state.

  As shown in FIG. 7, the pole 13 is a plate-like member having the same thickness as the hook 12 and is attached to the first base plate 11 so as to be rotatable around the pole shaft 13P. The pole 13 includes a hook engaging surface portion 13 a on the side facing the hook 12. The hook engaging surface portion 13a is positioned so as to be engageable with the pole engaging surface portion 12b1 of the hook 12 that is locked by being engaged with the striker 8. At the upper end portion of the pole 13, a spring locking portion 13b capable of locking the front end portion of the urging spring S is provided. By the action of the urging spring S, the pole 13 is urged to rotate clockwise about the pole shaft 13P in FIG.

  As shown in FIG. 7, the first release lever 14 is a plate-like member thinner than the pole 13 and is attached to the first base plate 11 so as to rotate integrally with the pole 13 around the pole shaft 13P. It has been. A cable locking portion 14 a capable of locking one end portion of the first cable 103 is provided at the upper end portion of the first release lever 14. The first release lever 14 is biased to rotate clockwise around the pole shaft 13P in FIG.

  As shown in FIG. 7, the second lock mechanism 102 includes a second base plate 15, a second release lever 16 attached to the second base plate 15, an operation lever 17, and a connecting hook 18. Each of these constituent members is formed in a plate shape, and is assembled so that the plate surfaces of each other are overlapped. 7 to 14, the directions in the description of the second lock mechanism 102 will be described based on the directions described in the drawings for convenience. However, the second lock mechanism 102 is actually attached to the automobile seat 1. The direction is different. Specifically, up and down and front and rear in the directions shown in FIGS. 7 to 14 respectively correspond to the rear front right and left in the direction in which the second lock mechanism 102 is actually attached to the vehicle seat 1.

  As shown in FIG. 7, the second base plate 15 is formed by providing a standing wall portion 15 b that extends partially in the depth direction of the paper surface at the outer peripheral edge of the flat plate portion 15 a. A release lever shaft 16P extending in the depth direction of the paper surface is disposed at a substantially central portion of the flat plate portion 15a. Further, on the front end side of the flat plate portion 15a, a cylindrical contact pin 15a1 capable of contacting a hook outer surface portion 18a2 of the connecting hook 18 described later is disposed extending in the depth direction of the paper surface. A first cable fixing portion 15b1 for fixing the outer pipe of the first cable 103 is provided at the rear upper portion of the standing wall portion 15b, and a second cable fixing portion 15b2 for fixing the outer pipe of the second cable 104 at the front upper portion of the standing wall portion 15b. Is provided. In addition, a stopper portion 15b3 with which a base contact portion 16c1 of the second release lever 16 described later contacts is provided at the upper center portion of the standing wall portion 15b. Here, the contact pin 15a1 corresponds to a “connection hook contact portion” in the claims.

  As shown in FIG. 7, the second release lever 16 is rotatably connected to the second base plate 15 by a release lever shaft 16P. The second release lever 16 includes a first arm portion 16a extending from the release lever shaft 16P in the radial direction, a second arm portion 16b, and a third arm portion 16c. The first arm portion 16a, the second arm portion 16b, and the third arm portion 16c are arranged in the counterclockwise direction in this order around the release lever shaft 16P in FIG. At the end of the first arm portion 16a opposite to the release lever shaft 16P, a connection hook shaft 18P that rotatably connects a connection hook 18 described later is provided in the front direction of the paper (the direction of the second base plate 15). It extends and is arranged. Further, a stopper portion 16a1 that contacts a lever contact portion 18b of a connecting hook 18 described later is disposed on the second arm portion 16b side at the end of the first arm portion 16a opposite to the release lever shaft 16P. ing. A cable locking portion 16b1 capable of locking the other end portion of the first cable 103 is provided at the end portion of the second arm portion 16b opposite to the release lever shaft 16P. At the end of the third arm portion 16c opposite to the release lever shaft 16P, a base contact portion that stops the second release lever 16 from rotating counterclockwise in FIG. 7 about the release lever shaft 16P. 16c1 is provided. The second release lever 16 is urged to rotate counterclockwise in FIG. 7 about the release lever shaft 16P with respect to the second base plate 15, and in the initial state of FIG. The rotation is stopped by contacting the stopper portion 15b3. Here, the second release lever 16 corresponds to a “release lever” in the claims.

  As shown in FIG. 7, the operation lever 17 is disposed on the back side of the paper surface of the second release lever 16 (opposite side of the second base plate 15), and rotates with respect to the second base plate 15 by the release lever shaft 16 </ b> P. Connected as possible. The operation lever 17 has a first arm portion 17a and a second arm portion 17b extending in the radial direction from the release lever shaft 16P. The first arm portion 17a and the second arm portion 17b are arranged so as to form a substantially V shape in a side view. At the end of the first arm portion 17a opposite to the release lever shaft 16P, a cylindrical engagement pin 17a1 that can be engaged with a hook inner side surface portion 18a1 of the connecting hook 18 to be described later is provided in the front direction of the paper (second direction). It extends in the direction of the base plate 15). A cable locking portion 17b1 capable of locking one end portion of the second cable 104 is provided at an end portion of the second arm portion 17b opposite to the release lever shaft 16P. The operation lever 17 is urged to rotate counterclockwise in FIG. 7 about the release lever shaft 16P with respect to the second base plate 15, and the engagement pin 17a1 is in the second release state in the initial state of FIG. The rotation is stopped by contacting the first arm portion 16a of the lever 16. Here, the engagement pin 17a1 corresponds to a “connection pin” in the claims.

  As shown in FIG. 7, the connecting hook 18 is rotatably connected to the first arm portion 16a of the second release lever 16 by a connecting hook shaft 18P. The connection hook 18 includes a connection hook portion 18a extending in the radial direction from the connection hook shaft 18P, and a lever contact portion 18b. The connecting hook portion 18a is formed in a jaw shape in a side view, and the hook inner side surface portion 18a1 that can be engaged with the engaging pin 17a1 of the operation lever 17 on the side close to the connecting hook shaft 18P is on the side far from the connecting hook shaft 18P. A hook outer surface portion 18a2 that can contact the contact pin 15a1 of the second base plate 15 is formed. The connection hook 18 is biased to rotate clockwise in FIG. 7 about the connection hook shaft 18P with respect to the first arm portion 16a of the second release lever 16, and is engaged in the initial state of FIG. The hook 17 is engaged with the inner surface 18a1 of the hook to stop the rotation. Here, the connecting hook portion 18a corresponds to a “pin engaging portion” in the claims, and the hook outer surface portion 18a2 corresponds to “a part of the pin engaging portion” in the claims.

  As shown in FIG. 7, the lower end portion of the back frame 9 is connected to the rear end portion of the cushion frame 4 so as to be rotatable about a reclining shaft RP. A pressing member 7 a having an upright plate portion 7 a 1 extending in the depth direction of the paper surface (cushion frame 4 side) is attached to the side surface portion of the back frame 9. The standing plate portion 7a1 of the pressing member 7a is formed in an arc shape centered on the reclining shaft RP in a side view, and an outer edge of the rear end portion of the cushion frame 4 formed in an arc shape centered on the reclining shaft RP. It is formed to be slidable along the portion 4a. A front stopper surface portion 4b extending in the radial direction from the reclining shaft RP is formed at the front end portion of the outer edge portion 4a, and a rear stopper surface portion 4c extending in the radial direction from the reclining shaft RP is formed at the rear end portion of the outer edge portion 4a. ing. When the front end of the upright plate portion 7a1 comes into contact with the front stopper surface portion 4b, the forward tilt of the back frame 9 is restricted, and when the rear end portion of the upright plate portion 7a1 comes into contact with the rear stopper surface portion 4c, Fall is regulated. A ring plate 19 is disposed between the cushion frame 4 and the back frame 9 so as to be rotatable about the reclining shaft RP. The ring plate 19 has a first protrusion 19a extending in the radial direction from the reclining axis RP, and a second protrusion 19b extending in the radial direction opposite to the first protrusion 19a from the reclining axis RP. When the back frame 9 tilts forward with respect to the cushion frame 4, the first protrusion 19 a is pressed against the front end of the standing plate 7 a 1, so that the ring plate 19 is centered on the reclining axis RP in FIG. 7. Turn counterclockwise. The other end of the second cable 104 is locked to the end of the second protrusion 19b opposite to the reclining shaft RP. In the initial state of FIG. 7, the ring plate 19 is urged to rotate clockwise about the reclining shaft RP by the traction force of the second cable 104, and abuts against a stopper (not shown) provided on the cushion frame 4. The rotation is stopped at a position where the protruding portion 19a is separated from the front end portion of the standing plate portion 7a1. Here, the second cable 104 corresponds to a “connecting member” in the claims.

  As shown in FIG. 1, the first cable 103 is one on the side of the second lock mechanism 102 and is divided into two on the way, and each is connected to the left and right first lock mechanisms 101. As a result, when the other end portion is pulled toward the second lock mechanism 102, the one end portion is pulled simultaneously at the left and right first lock mechanisms 101. In addition, when the pulling of the other end portion is released on the side of the second lock mechanism 102, the pulling of the one end portion is simultaneously released in the left and right first lock mechanisms 101.

  The operation of the locking device 7 will be described with reference to FIGS. FIG. 7 shows a locked state of the locking device 7 when the vehicle seat 1 is in a use state (FIG. 2) in which an occupant can be seated. In the first lock mechanism 101, the hook portion 12 a of the hook 12 holds the striker 8 between the upper end edge of the recess 11 b of the base plate 11. The pole 13 is urged to rotate clockwise in FIG. 7 about the pole shaft pin 13P by the urging force of the urging spring S, and the rear lower end portion of the hook engaging surface portion 13a protrudes forward of the hook 12. The rotation is stopped by contacting the lower side of the portion 12b. The hook engaging surface portion 13a of the pole 13 is in a state of being engaged with the pole engaging surface portion 12b1 of the hook 12 so as to be opposed thereto. At this time, in the second lock mechanism 102, the second release lever 16 is rotated counterclockwise in FIG. 7 about the release lever shaft 16P when the cable locking portion 16b1 is pulled by the first cable 103. Thus, the base abutting portion 16c1 abuts against the stopper portion 15b3 and the rotation is stopped. The operation lever 17 is stopped from rotating when the engagement pin 17a1 contacts the first arm portion 16a of the second release lever 16 in a state where the hook inner side surface portion 18a1 of the connection hook 18 is engaged with the engagement pin 17a1. ing. The ring plate 19 is urged to rotate clockwise about the reclining shaft RP by the traction force of the second cable 104 and abuts against a stopper (not shown) provided on the cushion frame 4 so that the first protrusion 19a is a standing plate portion. The rotation is stopped at a position separated from the front end of 7a1.

  FIG. 8 shows a state of the locking device 7 when the automobile seat 1 shifts from the state shown in FIG. 2 to the state shown in FIG. As shown in FIG. 3, when the seat back 3 is lowered from the standing position toward the folding position where the seat back 3 is overlapped with the seat cushion 2, the ring plate 19 has the first protrusion 19 a and the standing plate 7 a 1. Is rotated counterclockwise about the reclining shaft RP in FIG. Accordingly, in the second lock mechanism 102, the second protrusion 19b pulls the second cable 104, and the operation lever 17 rotates clockwise in FIG. 8 about the release lever shaft 16P. Then, since the hook inner side surface portion 18a1 of the connecting hook 18 is engaged with the engagement pin 17a1 of the operation lever 17 from below, the second release lever 16 also rotates clockwise in FIG. 8 around the release lever shaft 16P. Move. Then, the second arm portion 16b pulls the first cable 103. In the first lock mechanism 101, the first release lever 14 and the pole 13 are integrally formed around the pole shaft 13P and counterclockwise in FIG. To turn. As a result, the hook engagement surface portion 13a of the pole 13 and the pole engagement surface portion 12b1 of the hook 12 are disengaged, and the hook 12 rotates counterclockwise around the hook shaft 12P to hold the striker 8 therebetween. The unlocked state is released.

  FIG. 9 shows a state of the locking device 7 when the seat back 3 is further tilted toward the folding position from the state of FIG. In the second lock mechanism 102, the second release lever 16 together with the connecting hook 18 and the release lever shaft 16P is centered on the release lever shaft 16P in accordance with the clockwise rotation in FIG. And rotate clockwise. And the side far from the engagement pin 17a1 of the hook outer surface part 18a2 of the connection hook 18 contacts the contact pin 15a1.

  FIG. 10 shows a state of the locking device 7 when the seat back 3 is further tilted toward the folding position from the state of FIG. With the clockwise rotation in FIG. 9 about the release lever shaft 16P of the operation lever 17 and the second release lever 16, the connection hook 18 is pressed against the hook outer surface portion 18a2 by the contact pin 15a1, and the connection hook shaft 18P. 10 is rotated counterclockwise in FIG. 10 to disengage from the engagement pin 17a1.

  Then, as shown in FIG. 11, in the second lock mechanism 102, the second release lever 16 is rotated counterclockwise in FIG. The portion 16c1 contacts the stopper portion 15b3, and the rotation is stopped. At this time, in the first lock mechanism 101, the first release lever 14 and the pole 13 are integrally rotated about the pole shaft 13P clockwise in FIG. To do. Then, the hook-side surface portion between the hook engaging surface portion 13a of the pole 13 and the pole shaft 13P comes into contact with the front projecting portion 12b of the hook 12, and the rotation is stopped. The state of the locking device 7 corresponds to the state of the automobile seat 1 shown in FIG. The state of the locking device 7 is the same in the state of the automobile seat 1 shown in FIG.

  FIG. 12 shows a locked state of the locking device 7 when the automobile seat 1 in the retracted state shown in FIG. 4 is lowered backward about the rotation shaft 6. The state of the second lock mechanism 102 is not different from the state of FIG. In the first lock mechanism 101, when the first lock mechanism 101 is brought closer to the striker 8, the striker 8 enters the recess 11 b of the base plate 11 and reaches the upper edge of the opening of the hook portion 12 a of the hook 12 positioned there. Abut and press. As a result, the hook 12 pivots clockwise in FIG. 12 about the hook shaft 12P, and finally the hook portion 12a holds the striker 8 against the upper edge of the recess 11b as shown in FIG. It becomes a state. When the hook 12 pivots clockwise in FIG. 12 about the hook shaft 12P, the front surface portion of the front projecting portion 12b of the hook 12 is formed between the hook engaging surface portion 13a of the pole 13 of the pole 13 and the pole shaft 13P. It slides in a state in contact with the surface portion on the hook 12 side. When the lower end of the front surface of the front projecting portion 12b of the hook 12 is disengaged from the hook 12 side surface portion between the hook engaging surface portion 13a of the pole 13 and the pole shaft 13P, the pole 13 is centered on the pole shaft 13P. , The rear end portion of the hook engaging surface portion 13a of the pole 13 comes into contact with the lower side of the front projecting portion 12b of the hook 12, and the rotation is stopped. Then, the hook engaging surface portion 13a of the pole 13 is engaged with the pole engaging surface portion 12b1 of the hook 12 so as to be opposed thereto.

  FIG. 13 shows a state in which the seat back 3 shown in FIG. 5 is in the folded position and the seat back 3 of the automobile seat 1 in the locked state is rotated about the rotation shaft 6 to bring the seat back 3 into the upright position. This is the state of the locking device 7 on the way. The state of the first lock mechanism 101 is not different from the state of FIG. In the second lock mechanism 102, when the seat back 3 is raised from the folding position toward the standing position, the ring plate 19 releases the pressure of the first protrusion 19a against the front end of the standing plate 7a1. As a result, it rotates clockwise around the reclining axis RP in FIG. As a result, the second protrusion 19b loosens the second cable 104 and the operation lever 17 rotates counterclockwise in FIG. 13 about the release lever shaft 16P. Then, the engagement pin 17a1 of the operation lever 17 contacts the side of the hook outer surface portion 18a2 of the connection hook 18 that is far from the connection hook shaft 18P.

  FIG. 14 shows a state of the locking device 7 in the middle of moving the seat back 3 around the rotation shaft 6 closer to the standing position from the state of the locking device 7 shown in FIG. The state of the first lock mechanism 101 is not different from the state of FIG. In the second locking mechanism 102, the second protrusion 19b of the ring plate 19 further loosens the traction of the second cable 104 as the seat back 3 rotates, and the operation lever 17 is centered on the release lever shaft 16P in FIG. At counterclockwise. Then, the engagement pin 17a1 of the operation lever 17 abuts on the side of the hook outer surface portion 18a2 of the connection hook 18 that is far from the connection hook shaft 18P, and is closer to the connection hook shaft 18P of the hook outer surface portion 18a2 of the connection hook 18. Slide towards. As a result, the connecting hook 18 rotates counterclockwise in FIG. 14 about the connecting hook shaft 18P, and when the hook passes the side closer to the connecting hook shaft 18P of the hook outer surface portion 18a2, the connecting hook shaft 18P is rotated by a biasing force. 14 is rotated clockwise in FIG. Then, the hook inner side surface portion 18a1 of the connecting hook 18 is engaged with the engaging pin 17a1 from below, and the state shown in FIG. 7 is restored.

  1st Embodiment comprised as mentioned above has the following effects. The connection hook 18 is supported by the connection hook shaft 18P so as to be rotatable with respect to the second release lever 16, and is urged to rotate in a direction in which the hook inner side surface portion 18a1 engages with the engagement pin 17a1. Then, when the operation lever 17 is rotated by a predetermined angle, the hook outer surface portion 18 a 2 of the connection hook 18 contacts the contact pin 15 a 1 of the second base plate 15. Further, when the operation lever 17 rotates, the contact position of the contact pin 15a1 with respect to the hook outer surface portion 18a2 moves, and the connection hook 18 rotates about the connection hook shaft 18P to engage with the engagement pin 17a1. Comes off. As a result, it is not necessary to provide the connecting hook 18 with a portion that abuts on a part of the second base plate 15 other than the connecting hook portion 18a. be able to. Further, when the seat back 3 is rotated from the locked state where the seat back 3 is in the standing position and the hook 12 holds the striker 8 to the folding position, the pole 13 is rotated via the first release lever 14. The engagement with the hook 12 is released. As a result, the hook 12 is unlocked by the rotational biasing force, and the vehicle seat 1 can be separated from the floor FL. When the first lock mechanism 101 is brought close to the striker 8 while the seat back 3 is held in the folded position, the hook 12 is turned against the turning urging force by the press by the striker 8 to be in a locked state. Is engaged with the hook 12 by the rotating biasing force to maintain the locked state. That is, the vehicle seat 1 can be locked with respect to the floor FL while the seat back 3 is held in the folded position, and the stability of the traveling seat can be ensured.

  The vehicle seat 1 includes a first base plate 11 provided with a hook 12, a pole 13, and a first release lever 14, a second base plate 15 provided with a second release lever 16 and an operation lever 17, Are attached, and the first release lever 14 and the second release lever 16 are connected by a first cable 103 so as to be interlocked. Thereby, the arrangement | positioning freedom degree of the locking mechanism 10 in the vehicle seat 1 expands.

  15 to 29 show a locking device 7A according to a second embodiment of the present invention. The lock device 7A includes a lock mechanism 10A and a striker 8. The difference from the lock device 7 according to the first embodiment is that a lock mechanism 10 </ b> A is adopted for the lock mechanism 10. The lock mechanism 10A includes a base plate 11A, a hook 12A attached to the base plate 11A, a pole 13A, a cam 14A, a biasing plate 15A, and a release lever 16A. Here, the locking device 7A corresponds to the “vehicle seat locking device” in the claims.

  As shown in FIGS. 15 and 16, the base plate 11A is formed by assembling the left base plate 11AL and the right base plate 11AR with a space therebetween. The left base plate 11AL includes an upper left base plate 11ALa and a lower left base plate 11ALb, and the right base plate 11AR includes an upper right base plate 11ARa and a lower right base plate 11ARb. The upper left base plate 11ALa is a flat plate-like member, and is provided with an attachment hole 11ALa11 at the upper part, a hook shaft hole 11ALa12 at the rear lower part, and a pole shaft hole 11ALa13 at the lower front part. Further, an elliptical pole pin hole 11ALa14 bent in a crank shape is provided on the upper front side of the pole shaft hole 11ALa13, and a release lever shaft hole 11ALa15 is provided above the pole pin hole 11ALa14. Below the pole pin hole 11ALa14 of the upper left base plate 11ALa, there is a connection hook rotation pin that stands and supports a connection hook rotation pin 11ALa16 that contacts the connection hook 22A, which will be described later, and rotates the connection hook 22A. A hole 11ALa17 is provided. The lower left base plate 11ALb is a planar plate-like member having a recess 11ALb1 that opens downward and forward on the lower side. A hook shaft hole 11ALb2 is provided in the upper rear portion, and a pole shaft hole 11ALb3 is provided in the upper front portion. ing. A resin member 11ALb4 is attached to the outer peripheral edge of the recess 11ALb1 to soften the strike of the lower left base plate 11ALb against the striker 8 and prevent the generation of abnormal noise. When the upper left base plate 11ALa and the lower left base plate 11ALb are overlapped at a predetermined position, the hook shaft hole 11ALa12 and the hook shaft hole 11ALb2 are aligned, and the pole shaft hole 11ALa13 and the pole shaft hole 11ALb3 are aligned. Is formed. The left base plate 11AL and the right base plate 11AR each correspond to a “base plate” in the claims. The connecting hook rotation pin 11ALa16 corresponds to a “connecting hook contact portion” in the claims.

  As shown in FIGS. 15 and 16, the upper right base plate 11ARa includes a planar main body 11ARa1 and a standing wall 11ARa2 extending toward the left in the outer peripheral portion excluding the lower side of the main body 11ARa1. . A mounting hole 11ARa11 is provided in the upper part of the main body 11ARa1, a hook shaft hole 11ARa12 is provided in the rear lower part, and a pole shaft hole 11ARa13 is provided in the front lower part. The lower right base plate 11ARb is a planar plate-like member provided with a recess 11ARb1 that opens downward and forward, with a hook shaft hole 11ARb2 at the upper rear and a pole shaft hole 11ARb3 at the upper front. ing. A resin member 11ARb4 is attached to the outer peripheral edge of the recess 11ARb1 to soften the strike of the lower right base plate 11ARb against the striker 8 and prevent the generation of abnormal noise. When the upper right base plate 11ARa and the lower right base plate 11ARb are overlapped at a predetermined position, the hook shaft hole 11ARa12 and the hook shaft hole 11ARb2 are aligned, and the pole shaft hole 11ARa13 and the pole shaft hole 11ARb3 are aligned. Is formed. The upper left base plate 11ALa and the lower left base plate 11ALb overlapped at a predetermined position are, with respect to the upper right base plate 11ARa and the lower right base plate 11ARb overlapped at a predetermined position, a hook shaft pin 12AP and a pole shaft pin 13AP, which will be described later. Are connected by Thus, the upper left base plate 11ALa and the lower left base plate 11ALb are assembled to the upper left base plate 11ARa and the lower right base plate 11ARb with respect to the left end portion of the standing wall portion 11ARa2 while maintaining a space. The hook shaft pin 12AP and the pole shaft pin 13AP are attached perpendicularly to the left base plate 11AL and the right base plate 11AR. A hook 12A and a pole 13A are disposed in a space between the left base plate 11AL and the right base plate 11AR as will be described later. A round pipe-shaped spacer 18A is disposed between the peripheral edge of the mounting hole 11ALa11 of the upper left base plate 11ALa and the peripheral edge of the mounting hole 11ARa11 of the upper right base plate 11ARa. Then, the striker 8 is received by a bolt (not shown) passed through the inner cylinder portion of the spacer 18A with the recesses 11ALb1 and the recesses 11ARb1 facing forward and downward in the lower part on the rear end side of the cushion frame 4 shown in FIG. Is installed in a state where it is possible. On the upper end portion side of the standing wall portion 11ARa2, a spring locking hole 11ARa21 for locking one end portion of a coil spring 15AS described later is provided. Here, the hook shaft pin 12AP corresponds to the “hook shaft” in the claims, and the pole shaft pin 13AP corresponds to the “pole shaft” in the claims.

  As shown in FIGS. 15 to 18 and 29, the hook 12 </ b> A is a plate-shaped member that is hooked with respect to the base plate 11 </ b> A by a hook shaft pin 12 </ b> AP that is passed through a shaft pin hole 12 </ b> AH provided in a substantially central portion. It is attached so that it can rotate around the pin 12AP. Specifically, as shown in FIG. 29, the left end portion of the hook shaft pin 12AP that rotatably supports the hook 12A is passed through the hook shaft hole 11ALa12 and the hook shaft hole 11ALb2 of the left base plate 11AL and is fixed by caulking. Yes. Further, the right end portion of the hook shaft pin 12AP that rotatably supports the hook 12A is passed through the hook shaft hole 11ARa12 and the hook shaft hole 11ARb2 of the right base plate 11AR and fixed by caulking. The hook 12 </ b> A includes a hook portion 12 </ b> Aa that opens rearward and upward in a side view. From the hook portion 12Aa to the peripheral portion of the shaft pin hole 12AH, it is formed as a thick portion 12Ab having a large thickness, and the side facing the pole 13A other than the thick portion 12Ab and separated from the shaft pin hole 12AH has a thick portion It is formed as a thin part 12Ac of about 1/2 of 12Ab. The thick part 12Ab and the thin part 12Ac are formed in a staircase shape. In the thin portion 12Ac, an upper end protrusion 12Ac1 protruding in a direction away from the shaft pin hole 12AH is formed at the upper end of the hook portion 12Aa on the opening side. Further, the thin portion 12Ac is provided with a protrusion 12Ac2 protruding above the hook portion 12Aa in a direction away from the shaft pin hole 12AH, and the surface facing the lower pole 13A of the protrusion 12Ac2 is the first locking surface portion 12Ac3. It is formed as. In addition, an arc-shaped second locking surface portion 12Ac4 centering on the axis of the shaft pin hole 12AH is formed adjacent to the lower side of the first locking surface portion 12Ac3. That is, when viewed from the side, the first end surface portion 12Ac6 is formed at the outer peripheral end portion of the thin portion 12Ac, and the first locking surface portion 12Ac3 and the second locking surface portion 12Ac4 are formed in the first end surface portion 12Ac6. . In the thick portion 12Ab, the end portion on the side facing the pole 13A of the thick portion 12Ab as a side view is formed as a second end surface portion 12Ab1 that rises vertically from the right side surface of the thin portion 12Ac to the right. . The second end surface portion 12Ab1 includes a bulging portion 12Ab11 that bulges in the direction of the protrusion 12Ac2 in a side view, and a front surface of the bulging portion 12Ab11 is formed as a cam contact surface portion 12Ab12. That is, the cam contact surface portion 12Ab12 is formed in the second end surface portion 12Ab1. Further, the hook 12A has an annular shape that urges the hook 12A to rotate about the hook shaft pin 12AP counterclockwise in FIG. 18 (in a direction to release the engagement with the striker 8) with respect to the left base plate 11AL. A hook spring locking portion (not shown) for locking one end of the hook spring 12AS is provided. One end of the hook spring 12AS is locked to the hook spring locking portion of the hook 12A and the other end is hook hook locking portion of the left base plate 11AL in a state where the hook shaft pin 12AP is disposed in the ring. (Not shown) is disposed and locked. By the rotation of the hook 12A, the hook portion 12Aa can be engaged with or released from the striker 8 received in the recess 11ALb1 and the recess 11ARb1 of the base plate 11A. As shown in FIG. 18, in a state where the hook portion 12Aa is engaged with the striker 8, the striker 8 is sandwiched between the hook portion 12Aa and the concave portion 11ALb1 and the concave portion 11ARb1 to be in a locked state.

  As shown in FIGS. 15 to 18 and 29, the pole 13A is a plate-like member having a thickness similar to that of the thin portion 12Ac of the hook 12A, and is provided with a shaft pin hole 13AH at a substantially central portion. The pole 13A is attached to the base plate 11A so as to be rotatable around the pole shaft pin 13AP by a pole shaft pin 13AP passed through the shaft pin hole 13AH. Specifically, as shown in FIG. 29, the left end portion of the pole shaft pin 13AP that rotatably supports the pole 13A is formed in the pole shaft hole 11ALa13 of the upper left base plate 11ALa and the pole shaft hole 11ALb3 of the lower left base plate 11ALb. Threaded and fixed. A washer 19A is disposed between the pole 13A and the lower left base plate 11ALb. The washer 19A is for the pole 13A to be disposed at the same position in the direction of the pole shaft pin 13AP with respect to the thin portion 12Ac of the hook 12A. Further, the right end portion of the pole shaft pin 13AP that rotatably supports the pole 13A is passed through and fixed to the pole shaft hole 11ARa13 of the upper right base plate 11ARa and the pole shaft hole 11ARb3 of the lower right base plate 11ARb. The pole 13A includes a locking end 13Aa on the side facing the hook 12A. The locking end portion 13Aa is positioned so as to be engageable with the first locking surface portion 12Ac3 of the hook 12A engaged with the striker 8 and brought into a locked state. A first arm portion 13Ab extending in the radial direction is provided on the opposite side of the locking end portion 13Aa across the shaft pin hole 13AH, and a cam contact pin 13Ae is provided on the first arm portion 13Ab with respect to the pole 13A. It is fixed vertically extending in the right direction (the direction of the right base plate 11AR). The cam contact pin 13Ae is disposed in a state where the right end portion side thereof does not contact the right base plate 11AR. A second arm portion 13Ac extending in the radial direction from the shaft pin hole 13AH is provided substantially vertically upward with respect to the locking end portion 13Aa and the first arm portion 13Ab. A pin hole 13Ac1 penetrating in the plate thickness direction for fixing the pole pin 13Af is provided on the radial front end side of the second arm portion 13Ac, and the pole pin 13Af is perpendicular to the pole 13A and leftward in the pin hole 13Ac1 It extends and is fixed (in the direction of the left base plate 11AL). As will be described later, the pole pin 13Af passes through the pole pin hole 11ALa14 of the upper left base plate 11ALa and is disposed to protrude to the left from the left surface of the upper left base plate 11ALa. A portion of the pole pin 13Af protruding leftward from the left surface of the upper left base plate 11ALa is passed through the pole pin hole 16Ac of the release lever 16A and is slidable. Thus, the pole 13A is urged to rotate clockwise around the pole shaft pin 13AP in FIG. 18 by the urging force applied to the pole pin 13Af from the release lever 16A via the pole pin hole 16Ac. A hook sliding surface portion 13Ag extending in the direction of the pole shaft pin 13AP from the lower end portion of the locking end portion 13Aa of the pole 13A is formed. Here, the pole pin 13Af corresponds to a “projection” in the claims.

  As shown in FIGS. 15 to 18 and 29, the cam 14 </ b> A is a plate-like member attached so as to be rotatable around the pole shaft pin 13 </ b> AP between the pole 13 </ b> A and the right base plate 11 </ b> AR. The cam 14A and the pole 13A can be individually rotated around the pole shaft pin 13AP. The cam 14A includes a disc-shaped base portion 14Aa having a cam shaft hole 14AH provided in the center in a side view, and a cam portion connected to the base portion 14Aa by a pair of connecting portions 14Ac extending in the radial direction from the cam shaft hole 14AH. 14 Ab. In a portion surrounded by the base portion 14Aa, the pair of connecting portions 14Ac, and the cam portion 14Ab, a curved elongated hole-shaped reducing hole 14Ad penetrating in the plate thickness direction is formed. The cam 14A has the same thickness as the second end surface portion 12Ab1 of the hook 12A. Three arc-shaped protrusions 14Aa1 protruding in the left direction (the direction of the pole 13A) are provided at the outer peripheral end of the base part 14Aa at equal intervals. The protrusion 14Aa1 is for the left end, which is the tip, to abut the pole 13A so that the pole 13A and the cam 14A can easily rotate relative to each other around the pole shaft pin 13AP. Further, at the outer peripheral end of the base portion 14Aa, a pole abutting portion 14Aa2 that protrudes downward in the radial direction from the cam shaft hole 14AH in FIG. 18 is provided. The pole contact portion 14Aa2 is formed so as to be able to contact the cam contact pin 13Ae of the pole 13A. The lower side of the end surface of the cam portion 14Ab opposite to the reduction hole 14Ad is formed as a substantially arc-shaped hook contact surface 14Ab1 centered on the center of the cam shaft hole 14AH. Specifically, the hook contact surface 14Ab1 gradually pushes the cam contact surface portion 12Ab12 of the hook 12A to the far side as the clockwise rotation in FIG. 18 centering on the pole shaft pin 13AP of the cam 14A. The curved surface shape has a certain driving angle. On the upper side of the end surface of the cam portion 14Ab opposite to the reduction hole 14Ad, a substantially arc-shaped projection portion 14Ab2 that protrudes in the left direction (the direction of the pole 13A) is provided. The protrusion 14Ab2 is also for the left end, which is the tip, to abut the pole 13A so that the pole 13A and the cam 14A can easily rotate relative to each other around the pole shaft pin 13AP. An urging plate contact pin 14Ae is fixed to the lower end portion side of the cam portion 14Ab so as to extend perpendicularly to the cam 14A in the right direction (the direction of the right base plate 11AR). The urging plate abutting pin 14Ae of the cam 14A is disposed in a state where the right end portion does not abut against the right base plate 11AR. As a result, the cam 14A returns the hook 12A to the state in which the rotation of the hook 12A is restricted by the pole 13A as the rotation of the biasing plate contact pin 14Ae is received by the biasing force of the biasing plate 15A described later. From this position, it is pushed around in the direction of further rotation. Then, the gap between the hook portion 12Aa of the hook 12A and the concave portion 11ALb1 and the concave portion 11ARb1 of the base plate 11A is filled, and the striker 8 is held so as not to rattle.

  As shown in FIGS. 15 to 18 and 29, the urging plate 15A is a plate-like member having the same thickness as the cam 14A, and rotates around the hook shaft pin 12AP between the hook 12A and the right base plate 11AR. Installed as possible. The urging plate 15A and the hook 12A can be individually rotated around the hook shaft pin 12AP. The urging plate 15A is provided with a urging plate shaft hole 15AH in the center portion in a side view, a cam contact arm portion 15Ab is provided on the front side facing the cam 14A, and the urging plate shaft of the cam contact arm portion 15Ab. A spring locking arm portion 15Ac is provided on the opposite side across the hole 15AH. A coil spring 15AS is hung between the spring locking arm portion 15Ac and the spring locking hole 11ARa21 of the upper right base plate 11ARa so that the biasing plate 15A is centered on the hook shaft pin 12AP with respect to the left base plate 11AL. Is biased counterclockwise. A cam contact surface portion 15Ab1 that is smoothly curved is provided on the lower side of the cam contact arm portion 15Ab. In FIG. 18, 14A is rotated clockwise around the pole shaft pin 13AP.

  As shown in FIGS. 15 to 17, the release lever 16A is a plate-like member having a thickness similar to that of the cam 14A. It has a circular shape. On the upper end portion side of the release lever 16A, the release lever 16A extends around the release lever shaft pin 17A through the release lever shaft pin 17A that extends to the left perpendicular to the upper left base plate 11ALa and is disposed in the release lever shaft hole 11ALa15. Is provided with a release lever shaft hole 16Aa. Further, on the lower end side of the release lever 16A, a connection hook shaft hole 16Ab for attaching a connection hook shaft pin 22AP that rotatably supports a connection hook 22A described later is provided. At an intermediate portion between the release lever shaft hole 16Aa and the connecting hook shaft hole 16Ab, one end of a torsion coil spring 16AS for biasing the release lever 16A around the release lever shaft pin 17A counterclockwise in FIG. A spring locking hole 16Ad is provided for locking the. Further, the release lever 16A is provided with a pole pin hole 16Ac, which is a long hole that is curved and extends along the outer peripheral edge with the spring locking hole 16Ad as an inner side. The pole pin hole 16Ac is formed so that the pole pin 13Af can slide therein. The torsion coil spring 16AS is disposed around the release lever shaft pin 17A between the upper left base plate 11ALa and the upper right base plate 11ARa, and the other end of the torsion coil spring 16AS is a spring engagement provided on the upper right base plate 11ARa. It is locked to a stop hole (not shown). Here, the release lever shaft pin 17A corresponds to the “release lever shaft” in the claims, and the pole pin hole 16Ac corresponds to the “hole” in the claims.

  As shown in FIGS. 15 to 17, the connecting hook 22 </ b> A is a plate-like member having a thickness similar to that of the pole 13 </ b> A, and is substantially U-shaped and opened upward in a side view (viewed from the extending direction of the pole shaft pin 13 </ b> AP). It has a shape. On the upper end side of the connection hook 22A, a connection hook 22A that extends to the left perpendicular to the release lever 16A and is rotatable around the connection hook shaft pin 22AP disposed in the connection hook shaft hole 16Ab. A hook shaft pin hole 22Aa is provided. Further, an engaging portion 22Ab that can be engaged from below with a connecting pin 21Aa of an operation lever 21A described later is provided on the lower end side of the connecting hook 22A. The engaging portion 22Ab is formed with a front inclined surface portion 22Ab1 which is a front inclined surface portion and a rear inclined surface portion 22Ab2 which is a rear inclined surface portion. Further, a convex portion 22Ac that protrudes to the right (in the direction of the release lever 16A) is provided in the vicinity of the connection hook shaft pin hole 22Aa of the connection hook 22A. Between the connecting hook 22A and the release lever 16A, a torsion coil spring 22AS is disposed to urge the connecting hook 22A to rotate clockwise around the connecting hook shaft pin 22AP with respect to the release lever 16A in FIG. It is installed. Then, the protrusion 22Ac of the connection hook 22A abuts on the release lever 16A, so that the rotation of the connection hook 22A with respect to the release lever 16A is stopped. Here, the connection hook shaft pin 22AP corresponds to a “connection hook shaft” in the claims. The engaging portion 22Ab corresponds to a “pin engaging portion” in the claims, and the front inclined surface portion 22Ab1 corresponds to “a part of the pin engaging portion” in the claims.

  As shown in FIGS. 15 to 17, the operation lever 21 </ b> A is a plate-like member having the same thickness as the release lever 16 </ b> A and has a substantially rectangular shape when viewed from the side (viewed from the direction in which the pole shaft pin 13 </ b> AP extends). Yes. On the upper end side of the operation lever 21A, an operation lever shaft hole 21Ab is provided through which the operation lever 21A can be rotated around the release lever shaft pin 17A through the release lever shaft pin 17A. Further, on the lower end side of the operation lever 21A, a cable connection hole 21Ac that is a long hole for connecting the operation cable 20A for rotating the operation lever 21A around the release lever shaft pin 17A from the front side is provided. Yes. A connection pin hole 21Ad that inserts and supports the left end of the connection pin 21Aa is provided in a portion near the cable connection hole 21Ac between the operation lever shaft hole 21Ab and the cable connection hole 21Ac. The connecting pin 21Aa extends rightward (in the direction of the release lever 16A) from the operation lever 21A. Further, a cylindrical roller 21Aa1 is disposed on the connecting pin 21Aa so as to be rotatable with respect to the connecting pin 21Aa. Between the operation lever 21A and the upper left base plate 11ALa, a torsion coil spring 21AS for biasing the operation lever 21A around the release lever shaft pin 17A counterclockwise in FIG. 17 is disposed. One end of the torsion coil spring 21AS is locked to the spring locking portion 21Ae of the operation lever 21A, and the other end of the torsion coil spring 21AS is locked to the spring locking hole 11ALa18 of the upper left base plate 11ALa. Here, the operation cable 20 </ b> A corresponds to a “connecting member” in the claims.

  The operation of the locking device 7A will be described with reference to FIGS. 17 and 18 show a locked state of the locking device 7A when the vehicle seat 1 is in a use state (FIG. 2) in which an occupant can be seated. The hook portion 12Aa of the hook 12A holds the striker 8 between the recess 11ALb1 and the recess 11ARb1 of the base plate 11A. The pole 13A is urged to rotate clockwise in FIG. 17 about the pole shaft pin 13AP by the rotation urging force applied from the release lever 16A via the pole pin 13Af, and the rear lower end of the locking end portion 13Aa. The portion is in contact with the second locking surface portion 12Ac4 of the hook 12A and the rotation is stopped. At this time, the pole pin 13Af is located on the upper end side of the pole pin hole 16Ac. Further, the locking end portion 13Aa of the pole 13A is in a state in which a gap is formed facing the first locking surface portion 12Ac3 of the hook 12A. The cam 14A has a rotational biasing force applied from the biasing plate 15A as the pressing force of the cam contact pin 13Ae is reduced by the clockwise rotation of the pole 13A about the pole shaft pin 13AP in FIG. Thus, it is urged to rotate clockwise in FIG. The cam 14A presses the hook contact surface 14Ab1 against the cam contact surface portion 12Ab12 of the hook 12A and gradually pushes the cam contact surface portion 12Ab12 of the hook 12A toward the far side, so the hook 12A is centered on the hook shaft pin 12AP. In FIG. 18, it rotates clockwise. As a result, the gaps between the hook portion 12Aa and the recesses 11ALb1 and 11ARb1 of the base plate 11A are filled. When the normal vehicle seat 1 is used, it is held against the floor FL without play, and when the cam 14A is deformed due to excessive force input due to a rear impact or the like, the locking end portion of the pole 13A is used. 13Aa engages with the first locking surface portion 12Ac3 of the hook 12A and strongly holds it against the floor FL.

  Then, as shown in FIG. 3, when the seat back 3 is lowered from the standing position toward the folding position where the seat back 3 is overlapped with the seat cushion 2, one end of the operation lever 21A is engaged with the cable connection hole 21Ac. The operation cable 20A is stopped and pulled forward. Then, as shown in FIGS. 19 and 20, since the rear inclined surface portion 22Ab2 of the engagement portion 22Ab of the connection hook 22A is engaged with the connection pin 21Aa of the operation lever 21A via the roller 21Aa1, the connection is made. The release lever 16A is also pulled forward by the outer peripheral edge of the connecting hook shaft hole 16Ab via the hook 22A. Accordingly, the release lever 16A is rotated clockwise in FIG. 19 against the urging force of the torsion coil spring 16AS around the release lever shaft pin 17A. Accordingly, the pole pin 13Af of the pole 13A slides downward in the pole pin hole 16Ac of the release lever 16A, so that the pole 13A rotates counterclockwise around the pole shaft pin 13AP in FIG. To do. At this time, the cam 14A rotates counterclockwise in FIG. 20 against the rotation biasing force of the biasing plate 15A because the pole contact portion 14Aa2 is pressed by the cam contact pin 13Ae of the pole 13A. To do. As a result, the force that pushes the hook contact surface 14Ab1 against the cam contact surface portion 12Ab12 of the hook 12A and gradually pushes it toward the far side is reduced. The state where the gap is filled is released. When the hook contact surface 14Ab1 of the cam 14A is separated from the cam contact surface portion 12Ab12 of the hook 12A, the hook 12A is rotated clockwise in FIG. 20 by the rotation urging force of the hook spring 12AS, and is engaged with the striker 8. To release. Then, the first locking surface portion 12Ac3 of the hook 12A comes into contact with the locking end portion 13Aa of the pole 13A, and the clockwise rotation of the hook 12A in FIG. 19 is temporarily stopped. When the pole 13A further pivots counterclockwise in FIG. 19 around the pole shaft pin 13AP, the first locking surface portion 12Ac3 of the hook 12A is separated from the locking end portion 13Aa of the pole 13A, and the hook 12A is hook spring. The rotating biasing force of 12AS rotates counterclockwise in FIG. 19 to completely disengage the striker 8. 19 and 20 show a state where the hook 12A is completely disengaged from the striker 8. FIG. At this time, the pole pin 13Af of the pole 13A is positioned slightly above the center of the pole pin hole 16Ac of the release lever 16A.

  Then, as shown in FIG. 3, when the seat back 3 is further lowered toward the folding position where the seat back 3 is overlapped with the seat cushion 2, one end of the operation lever 21A is locked to the cable connection hole 21Ac. The operation cable 20A is pulled forward. Then, as shown in FIGS. 19 and 20, the front inclined surface portion 22Ab1 of the connection hook 22A attached to the release lever 16A that is rotated clockwise in FIG. 19 together with the operation lever 21A is connected to the connection hook rotation pin 11ALa16. Abut. From this state, when the seat back 3 is further lowered toward the folding position where it is overlapped with the seat cushion 2, the operation lever 21A is pulled forward by the operation cable 20A, and clockwise in FIG. Rotate. Accordingly, the connecting hook 22A moves from the connecting hook rotating pin 11ALa16 abutted in FIG. 19 to the outside of the base plate 11A. The so-called connecting hook 22A rotates counterclockwise, and the rear inclined surface portion 22Ab2 of the engaging portion 22Ab slides relative to the connecting pin 21Aa. When the connecting pin 21Aa gets over the upper end of the rear inclined surface portion 22Ab2 of the engaging portion 22Ab, the engaging portion 22Ab and the connecting pin 21Aa are disengaged, and the state shown in FIG. 21 is obtained. At this time, as shown in FIG. 22, the state of the hook 12A, the pole 13A, the cam 14A, and the biasing plate 15A is the same as the state of FIG.

  The state of the lock mechanism 10 </ b> A shown in FIGS. 23 and 24 is a state when the seat back 3 is folded to the seat cushion 2. In this state, the car seat 1 can be brought into the retracted state shown in FIG. The operation lever 21A is pulled forward by the operation cable 20A and is in a state of being rotated most clockwise around the release lever shaft pin 17A in FIG. The release lever 16A is rotated counterclockwise about the release lever shaft pin 17A in FIG. 23 by the biasing force of the torsion coil spring 16AS when the engagement of the connection hook 22A with the connection pin 21Aa is released, and the pole pin hole 16Ac. The front end edge of the slidably contacts the pole pin 13Af, and the rotation is stopped. Note that the rotation of the pole pin 13Af is stopped by the hook sliding surface portion 13Ag of the pole 13A being in contact with the upper surface portion of the protrusion 12Ac2 of the hook 12A. At this time, the connecting hook 22A is rotated counterclockwise around the connecting hook shaft pin 22AP in FIG. 23 by the urging force of the torsion coil spring 22AS, and the rotation is stopped when the convex portion 22Ac contacts the release lever 16A. It has been. At this time, as shown in FIG. 24, the state of the hook 12A, the pole 13A, the cam 14A, and the urging plate 15A is the same as the state of FIGS.

  The state of the locking device 7A shown in FIG. 25 and FIG. 26 is as shown in FIG. This is a state in which the lock device 7A is turned to the locked state. When the lock mechanism 10A is brought closer to the striker 8, the striker 8 enters the recess 11ALb1 and the recess 11ARb1 of the base plate 11A and comes into contact with and presses against the lower surface portion of the upper end protrusion 12Ac1 of the hook 12A located there. As a result, the hook 12A pivots clockwise in FIG. 26 about the hook shaft pin 12AP, and finally the hook portion 12Aa holds the striker 8 with respect to the recess 11ALb1 and the recess 11ARb1 as shown in FIG. It becomes. When the hook 12A rotates about the hook shaft pin 12AP in the clockwise direction in FIG. 26, the upper surface portion of the protrusion 12Ac2 of the hook 12A slides in a state of being in contact with the hook sliding surface portion 13Ag of the pole 13A. To go. When the front end of the projection 12Ac2 of the hook 12A of the hook 12A is detached from the pole 13A, the pole 13A rotates clockwise in FIG. 26 about the pole shaft pin 13AP, and the locking end of the pole 13A The lower end portion of 13Aa abuts on the second locking surface portion 12Ac4 of the hook 12A, and the rotation is stopped. Then, the locking end portion 13Aa of the pole 13A is in a state where a gap is formed so as to face the first locking surface portion 12Ac3 of the hook 12A. The cam 14A has a rotational biasing force applied from the biasing plate 15A as the pressing force of the cam contact pin 13Ae is lowered by the clockwise rotation of the pole 13A about the pole shaft pin 13AP in FIG. Thus, it rotates clockwise in FIG. The cam 14A presses the hook contact surface 14Ab1 against the cam contact surface portion 12Ab12 of the hook 12A and gradually pushes the cam contact surface portion 12Ab12 of the hook 12A toward the far side, so the hook 12A is centered on the hook shaft pin 12AP. In FIG. 26, it rotates clockwise. That is, as shown in FIG. 26, the state of the hook 12A, the pole 13A, the cam 14A, and the biasing plate 15A is the same as the state of FIG. As a result, the gaps between the hook portion 12Aa and the recesses 11ALb1 and 11ARb1 of the base plate 11A are filled. The vehicle seat 1 can ensure the stability of the traveling vehicle seat 1 by keeping the vehicle seat 1 locked to the floor FL while the seat back 3 is held in the folded position. it can.

  The state of the locking device 7A shown in FIGS. 27 and 28 is as shown in FIG. 6 in which the vehicle seat 1 is moved from the retracted state to the floor FL while the seat back 3 is in the folded position overlapped with the seat cushion 2. This is a state in which the seat back 3 is in an upright position with the locking device 7 </ b> A in a locked state. When the forward pulling by the operation cable 20A is released, the operation lever 21A is rotated counterclockwise around the release lever shaft pin 17A in FIG. Then, the connecting pin 21Aa contacts the front inclined surface portion 22Ab1 of the connecting hook 22A supported by the release lever 16A via the roller 21Aa1, and the contact position of the roller 21Aa1 with respect to the front inclined surface portion 22Ab1 is rotated with the rotation of the operation lever 21A. The connecting hook 22A rotates counterclockwise around the connecting hook shaft pin 22AP in FIG. 27 so as to move. When the connecting pin 21Aa gets over the upper end of the front inclined surface portion 22Ab1, the connecting hook 22A rotates clockwise around the connecting hook shaft pin 22AP in FIG. 27 by the biasing force of the torsion coil spring 22AS. As a result, the connecting pin 21Aa returns to the initial state shown in FIGS. 17 and 18 in which the rear inclined surface portion 22Ab2 is engaged from below via the roller 21Aa1.

  2nd Embodiment comprised as mentioned above has the following effects. The connection hook 22A is rotatably supported by the connection hook shaft pin 22AP with respect to the release lever 16A, and is urged to rotate in a direction in which the rear inclined surface portion 22Ab2 engages with the connection pin 21Aa. When the operation lever 21A rotates by a predetermined angle, the front inclined surface portion 22Ab1 of the connection hook 22A comes into contact with the connection hook rotation pin 11ALa16 disposed on the left base plate 11AL. Further, when the operation lever 21A rotates, the connection hook 22A rotates about the connection hook shaft pin 22AP so that the contact position of the roller 21Aa1 with the front inclined surface portion 22Ab1 moves, and the engagement with the connection pin 21Aa is released. . Accordingly, there is no need to provide the connecting hook 22A with a portion that contacts a part of the base plate 11A other than the engaging portion 22Ab, the connecting hook 22A can be reduced in size and weight, and the lock mechanism 10A can be reduced in size and weight. it can. Further, when the seat back 3 is rotated to the folding position from the locked state where the seat back 3 is in the standing position and the hook 12A holds the striker 8, the pole 13A is rotated via the operation lever 21A and the release lever 16A. Thus, the engagement with the hook 12A is released. As a result, the hook 12A is unlocked by the rotational biasing force, and the vehicle seat 1 can be separated from the floor FL. When the lock mechanism is brought close to the striker 8 while the seat back 3 is held in the folded position, the hook 12A is turned against the turning urging force by the press by the striker 8 to be locked, and the pole 13A is released from the release lever. The locking force is maintained by engaging with the hook 12A by the rotational biasing force of 16A. That is, the vehicle seat 1 can be locked with respect to the floor FL while the seat back 3 is held in the folded position, and the stability of the traveling seat can be ensured.

  The release lever shaft pin 17A and the pole shaft pin 13AP are both disposed on the base plate 11A, and the pole 13A and the release lever 16A are connected and interlocked by inserting the pole pin 13Af into the pole pin hole 16Ac. Are configured to rotate. As a result, the structure of the lock mechanism 10A in the automobile seat 1 can be simplified, and the weight can be further reduced.

  As mentioned above, although specific embodiment was described, this invention is not limited to those external appearances and structures, A various change, addition, and deletion are possible in the range which does not change the summary of this invention. For example, the present invention is applied to the seat 1 of an automobile, but may be applied to a seat mounted on an airplane, a ship, a train, or the like.

1 Car seat (vehicle seat)
2 Seat cushion 3 Seat back 3 7th locking device (vehicle seat locking device)
7A Locking device (vehicle seat locking device)
8 striker 10 lock mechanism 10A lock mechanism 11 first base plate 11A base plate 11b recess 11AL left base plate (base plate)
11ALa16 Connection hook rotation pin (connection hook contact part)
11ALb1 Recess 11AR Right base plate (base plate)
11ARb1 Recess 12 Hook 12P Hook shaft 12A Hook 12AP Hook shaft pin (hook shaft)
13 Pole 13P Pole shaft 13A Pole 13Af Pole pin 13AP Pole shaft pin (Pole shaft)
14 First release lever 15 Second base plate 15a1 Contact pin (connection hook contact portion)
16 Second release lever (release lever)
16P Release lever shaft 16A Release lever 17 Operation lever 17a1 Engagement pin (connection pin)
17A Release lever shaft pin (Release lever shaft)
18 Connection hook 18a Connection hook part (pin engaging part)
18a1 hook inner side surface portion 18a2 hook outer side surface portion (a part of the pin engaging portion)
18P Connection hook shaft 20A Operation cable (connection member)
21A Operation lever 21Aa Connecting pin 22Ab Engaging part (pin engaging part)
22Ab1 front inclined surface part (part of pin engaging part)
22Ab2 Rear inclined surface portion 22A Connection hook 22AP Connection hook shaft pin (connection hook shaft)
101 First lock mechanism (lock mechanism)
102 Second lock mechanism (lock mechanism)
103 1st cable FL floor

Claims (3)

A vehicle seat comprising a seat cushion and a seat back that is pivotably mounted between a standing position that stands up with respect to the seat cushion and a folded position that is overlapped can be held on the vehicle body. A vehicle seat locking device,
The vehicle seat locking device includes a striker provided on one of the vehicle body and the vehicle seat, and a lock mechanism provided on the other of the vehicle seat and the vehicle body,
The lock mechanism is pivotally supported by a first base plate having a recess capable of receiving the striker, and pivotally supported by a hook shaft with respect to the first base plate so that the striker enters the recess. A hook that is capable of forming a locked state in which the striker is sandwiched between an end edge portion of the recess and an unlocked state in which the striker is not sandwiched, and a hook that is urged to rotate in a direction to form the unlocked state, A pole that is pivotally supported by a pole shaft with respect to the first base plate and engages with the hook to hold the hook in the locked state, and
Further, the lock mechanism is pivotally supported by a release lever shaft with respect to the second base plate, and is rotated in conjunction with the pole to be separated from the release lever shaft. A release lever having a connection hook pivotally supported by a connection hook shaft provided in parallel with the release lever shaft, and a connection lever pivotally supported by the release lever shaft to be engaged with each other. And an operation lever having a connecting pin that enables rotation together with the release lever.
The operation lever is connected to the seat back by a connecting member so as to rotate in conjunction with the rotation of the seat back relative to the seat cushion, and is urged to rotate in the same direction as the release lever.
The connecting hook is urged to rotate in a direction in which a pin engaging portion that engages with the connecting pin engages with the connecting pin;
When the seat back is rotated to the folding position with the seat back in the standing position and the pole holding the hook in the locked state,
The release lever is accompanied by a movement in which the operation lever is rotated in a direction against the rotation bias in a state where the pin engaging portion of the connection hook is engaged with the connection pin by a rotation biasing force. The pivot is rotated integrally with the operation lever, and the hook is rotated in a direction to disengage the hook and the hook is in the unlocked state.
When the operation lever is rotated by a predetermined angle, a part of the pin engaging portion of the connecting hook comes into contact with a connecting hook abutting portion disposed on the second base plate, and the connecting hook is connected to the connecting pin. Rotate in the direction of disengagement to disengage,
The release lever is configured to allow the pawl to be engaged with the hook by its urging force when the hook is rotated to return to the locked state and the hook is rotated. Vehicle seat locking device.   2. The striker according to claim 1, wherein the striker is provided on the vehicle body, the lock mechanism is provided on the vehicle seat, and the pawl and the release lever are connected by a cable so as to rotate in conjunction with each other. A vehicle seat locking device constructed. A vehicle seat comprising a seat cushion and a seat back that is pivotably mounted between a standing position that stands up with respect to the seat cushion and a folded position that is overlapped can be held on the vehicle body. A vehicle seat locking device,
The vehicle seat locking device includes a striker provided on one of the vehicle body and the vehicle seat, and a lock mechanism provided on the other of the vehicle seat and the vehicle body,
The lock mechanism includes a base plate having a recess capable of receiving the striker, and is pivotally supported by a hook shaft so as to be rotatable with respect to the base plate. A hook that is capable of forming a locked state in which the striker is sandwiched between the end edges of the striker and an unlocked state in which the striker is not sandwiched, and a hook that is urged to rotate in a direction to form the unlocked state, A pole that is pivotally supported by a shaft and engages with the hook to hold the hook in the locked state, and is pivotally supported by a release lever shaft relative to the base plate and interlocked with the pole. And a connecting hook shaft provided in parallel with the release lever shaft at a position separated from the release lever shaft. The release lever having a connecting hook that is pivotally supported by the rotation lever and the release lever shaft that is pivotally supported by the release hook so that the connection hook is engaged to rotate integrally with the release lever. An operating lever having a connecting pin that enables
The pole and the release lever are configured to be linked and interlocked by inserting a protrusion provided on either one into a hole provided on the other,
The operation lever is connected to the seat back by a connecting member so as to rotate in conjunction with the rotation of the seat back relative to the seat cushion, and is urged to rotate in the same direction as the release lever.
The connecting hook is urged to rotate in a direction in which a pin engaging portion that engages with the connecting pin engages with the connecting pin;
When the seat back is rotated to the folding position with the seat back in the standing position and the pole holding the hook in the locked state,
The release lever is accompanied by a movement in which the operation lever is rotated in a direction against the rotation bias in a state where the pin engaging portion of the connection hook is engaged with the connection pin by a rotation biasing force. The pivot is rotated integrally with the operation lever, and the hook is rotated in a direction to disengage the hook and the hook is in the unlocked state.
When the operation lever is rotated by a predetermined angle, a part of the pin engaging portion of the connecting hook comes into contact with the connecting hook abutting portion disposed on the base plate, and the connecting hook is engaged with the connecting pin. Rotate in the direction to release, disengage,
The release lever is configured to allow the pawl to be engaged with the hook by its urging force when the hook is rotated to return to the locked state and the hook is rotated. Vehicle seat locking device.

Images