JP2019001278A - Vehicle seat locking device - Google Patents

Abstract

To provide a vehicle seat locking device restraining increase of a control force for releasing the lock state of the locking device even when enhancing a turning-directional biasing force by which a pole engages with a hook, and capable of setting the lock state when a seat back is located at a folding position.SOLUTION: A locking device comprises a striker 8 and a lock mechanism 10. The lock mechanism 10 is equipped with a base plate 11, a hook 12, a pole 13, a release lever 16, a control lever 21 and a connection hook 22. A pole pin 13f slides the peripheral edge part of a pole pin hole 16c by turning of the release lever 16 and thereby, the pole 13 turns to hold the hook 12 in a lock state. Besides, the release lever 16 turns via the control lever 21 as a seat back turns to a folding position to hold the hook 12 in an unlocked state. On the way thereto, the connection hook 22 strays from a connection pin 21a to restore the release lever 16 to a position in the lock state.SELECTED DRAWING: Figure 5

Description

  The present invention relates to a vehicle seat locking device.

  Conventionally, as a locking device for locking a vehicle seat, for example, an automobile seat, to a striker installed on a floor, one disclosed in Patent Document 1 below is known. This locking device includes a base plate, a plate-like hook, a plate-like pole, and a release lever integrated with the pole. The base plate includes a recess that is fixed to the automobile seat and that can receive the striker. The hook is pushed and rotated by an operation in which the striker is received in the recess of the base plate, and a part of the hook is engaged with the back of the striker to close the recess. When the hook is in a state where the recess is closed, the pole is engaged with the hook by the rotation received by the urging force of the tension coil spring hung between the release lever and the hook and stops the rotation of the hook. Put it in a state.

  Conventionally, in an automobile seat, the seat back is pivotably attached to the seat cushion, and the entire seat is flipped up substantially perpendicular to the floor in a state where the seat back is stacked on the seat cushion. There is something possible. In the technology described in Patent Document 2 below, 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. Such a locking mechanism is configured so that the seat back stands up with respect to the seat cushion and is locked in an upright position where an occupant can be seated, and is unlocked in a folded position overlaid on the seat cushion. ing. Further, even when the seat back is in the folding position, the vehicle seat is kept locked with respect to the floor, so that the stability of the traveling seat can be ensured.

JP 2009-52223 A JP 2004-34768 A

  In the automotive seat locking device described in Patent Document 1 described above, the hook is urged to rotate in a direction to engage the striker by the urging force of the tension coil spring hung between the release lever and the hook. The pole is urged to rotate in a direction to engage with the hook. Then, when the release lever is rotated to release the lock state of the lock device, the pole is rotated in the unlocked direction in which the engagement with the hook is released in conjunction with the release lever. At this time, in order to unlock the pole, it is necessary to overcome the biasing force of the spring and rotate the release lever. Therefore, in order to prevent the pole from being rotated in a direction in which the hook is disengaged from the hook due to an inertial force caused by an impact force applied at the time of an automobile collision or the like, the spring is locked when the urging force of the spring is increased. There has been a problem that the operating force for releasing the lock state of the apparatus also increases. In addition, after solving the above problem, even when the seat back is in the folded position as in the technique described in Patent Document 2, the vehicle seat is locked with respect to the floor, There was a need to be able to ensure the stability of the seat.

  In view of such a demand, the problem of the present invention is to suppress an increase in operating force for releasing the lock state of the lock device even if the biasing force in the rotation direction in which the pole engages with the hook is increased. Another object of the present invention is to provide a vehicle seat locking device that can be locked when the seat back is in the folded position.

  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 lock device, the vehicle seat lock 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 pivotally supported by a base plate having a recess capable of receiving the striker and a hook shaft perpendicular to the base plate. The striker is pushed by the movement into the recess and is rotated to lock the striker between the recess and the unlocked state. A hook that 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 perpendicular to the base plate and engaged with the hook. A pole that holds the hook in the locked state, and a connection that is pivotally supported by a release lever shaft that is perpendicular to the base plate and that is provided in parallel to the release lever shaft at a position separated from the release lever shaft A release lever having a connecting hook that is pivotally supported by a hook shaft and a pivot that is pivotally supported by the release lever shaft so that the connecting hook is engaged to rotate together with the release lever. And an operating lever having a connecting pin that enables the pole to be spaced apart from the pole shaft in the radial direction. The release lever is a plate-like member provided at a position between the release lever shaft and the connecting hook shaft and extending in a curved manner. A long hole through which the protrusion is slidably engaged, and the long hole is in contact with the peripheral edge when the release lever rotates in the direction in which it is urged to rotate. The pole is configured to rotate in a direction to engage with the hook, the operation lever is urged to rotate in the same direction as the release lever, and the connection hook is engaged with the connection pin. When the seat back is in the standing position and the pole holds the hook in the locked state and the seat back is rotated to the folding position, the release lever is The connecting hook is rotated by the 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 rotation of the operating lever in a direction against the rotation bias, and the pole is hooked. When the operating lever is rotated by a predetermined angle, the connecting hook is disengaged from the connecting pin. The release lever returns to the locked state and the hook is rotated to the locked state when the hook is rotated and the pole is engaged with the hook by the biasing force. It is constituted so that it may be permitted.

  According to the first aspect of the present invention, the elongated hole is rotated in the direction in which the pawl is engaged with the hook by the rotation in the direction in which the release lever is biased by the slidable engagement with the protrusion. It is formed as follows. Further, the long hole is provided at a position between the release lever shaft and the connecting hook shaft in the release lever. That is, in the release lever, the distance from the release lever shaft to the connecting hook shaft is longer than the distance from the release lever shaft to the long hole. As a result, in the state where the pole is engaged with the hook, the release lever is rotated with a force smaller than the force by which the release lever presses the pole in the direction of engaging the hook with the rotation biasing force, and the The engagement can be disengaged. 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 biasing force by the striker and is 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 base plate is formed of two plate members disposed to face each other, and the hook and the pole are disposed between the two plate members. The release lever and the operation lever are disposed on a surface opposite to the other of one of the two plates, and the elongated hole of the release lever is provided on the one of the two plates. The protrusion of the pole is slidably engaged through the through hole.

  According to the second aspect of the present invention, the base plate is formed of two plate members arranged opposite to each other, and the hook and the pole are released between the two plate members on the surface side opposite to the other of the two plate members. A lever and an operating lever are provided. As a result, the hook and pole, the release lever, and the operation lever can be separately provided on both sides of one of the two plates, so that the release lever and the rotation shaft of the operation lever are arranged with respect to the rotation shaft of the hook and pole. The degree of freedom increases.

It is a side view of the use condition of the car seat to which the locking device of one embodiment of the present invention was attached. It is a side view of the storage state of the vehicle seat to which the locking device of the embodiment is attached. It is a disassembled perspective view of the locking mechanism of the said embodiment. It is a perspective view of the state which assembled the lock mechanism of FIG. The base plate on the front side is omitted. Indicates lock status. It is a figure explaining the operating condition of the lock mechanism of the said embodiment. Indicates lock status. 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. Indicates lock status. 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. Indicates unlocked state. 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. Indicates unlocked state. 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. The situation where the release lever is further rotated from the unlocked state is shown. 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. The situation where the release lever is further rotated from the unlocked state is shown. 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. FIG. 10 shows the state of the lock mechanism when the release lever is further rotated from the state of FIG. 9 and the seat back is folded. 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. 10 shows the state of the lock mechanism when the release lever is further rotated from the state of FIG. 10 and the seat back is folded. 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. The seat back is shown in a locked state in a folded state. 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. The seat back is shown in a locked state in a folded state. 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. The state of the lock mechanism when the seat back is raised 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. The state of the lock mechanism when the seat back is raised from the state of FIG. It is a figure of the inner part of two baseplates. FIG. 6 is a cross-sectional view taken along line XVII-XVII in FIG. 5.

  1 to 17 show an 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 automobile seat 1 and the floor FL correspond to a “vehicle seat” and a “vehicle body” in the claims, respectively.

  1 and 2 are side views of an automobile seat 1 to which a vehicle seat locking device (hereinafter referred to as “locking device”) according to an embodiment of the present invention is applied. FIG. 1 shows the vehicle seat 1 in a use state in which an occupant is seated, and FIG. The vehicle seat 1 includes a seat cushion 2 and a seat back 3 attached to the rear end portion side of the seat cushion 2 so as to be rotatable about an axis extending in the left-right direction (front and back direction of the paper surface). The 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 locking device 7 is disposed between the lower part on the rear end side of the cushion frame 4 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 is roughly divided into a lock mechanism 10 attached to the lower portion of the cushion frame 4 on the rear end side and a striker 8 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.

  As shown in FIG. 1, 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. Then, when the seat back 3 is brought into the folded position where the seat back 3 is folded down with respect to the seat cushion 2, the lock device 7 is unlocked. A state in which the vehicle seat 1 is flipped forward with respect to the floor FL in a state where the seat back 3 is in the folded position with respect to the seat cushion 2 is a retracted state shown in FIG. When the automobile seat 1 in the retracted state is returned to the upright position with respect to the seat cushion 2 and lowered downward, the lock device 7 returns to the locked state. 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.

  As shown in FIGS. 3 to 6, the lock mechanism 10 includes a base plate 11, a hook 12 attached to the base plate 11, a pole 13, a cam 14, a biasing plate 15, and a release lever 16. .

  As shown in FIGS. 3 and 4, the base plate 11 is formed by assembling the left base plate 11L and the right base plate 11R with a space therebetween. The left base plate 11L includes an upper left base plate 11La and a lower left base plate 11Lb, and the right base plate 11R includes an upper right base plate 11Ra and a lower right base plate 11Rb. The upper left base plate 11La is a flat plate-like member, and is provided with an attachment hole 11La11 in the upper part, a hook shaft hole 11La12 in the lower rear part, and a pole shaft hole 11La13 in the lower front part. Further, an elliptical pole pin hole 11La14 bent in a crank shape is provided on the upper front side of the pole shaft hole 11La13, and a release lever shaft hole 11La15 is provided above the pole pin hole 11La14. Under the pole shaft hole 11La13 of the upper left base plate 11La, there is provided a stopper pin hole 11La17 for supporting a standing upright support pin 11La16 that stops the rotation of the release lever 16 by contacting a release lever 16 described later. It has been. The lower left base plate 11Lb is a planar plate-like member having a recess 11Lb1 that opens downward and forward on the lower side. A hook shaft hole 11Lb2 is provided in the upper rear portion, and a pole shaft hole 11Lb3 is provided in the upper front portion. ing. A resin member 11Lb4 is attached to the outer peripheral edge of the recess 11Lb1 to soften the strike of the lower left base plate 11Lb against the striker 8 and prevent the generation of abnormal noise. When the upper left base plate 11La and the lower left base plate 11Lb are overlapped at a predetermined position, the hook shaft hole 11La12 and the hook shaft hole 11Lb2 are aligned, and the pole shaft hole 11La13 and the pole shaft hole 11Lb3 are aligned. Is formed. The left base plate 11L and the right base plate 11R respectively correspond to “base plate, plate material” in the claims. Further, the pole pin hole 11La14 corresponds to a “through hole” in the claims.

  As shown in FIGS. 3 and 4, the upper right base plate 11Ra includes a planar main body 11Ra1 and a standing wall 11Ra2 extending toward the left in the outer peripheral portion excluding the lower side of the main body 11Ra1. . An attachment hole 11Ra11 is provided in the upper part of the main body 11Ra1, a hook shaft hole 11Ra12 is provided in the rear lower part, and a pole shaft hole 11Ra13 is provided in the lower front part. The lower right base plate 11Rb is a planar plate-like member having a recess 11Rb1 that opens downward and forward on the lower side. A hook shaft hole 11Rb2 is provided in the upper rear portion, and a pole shaft hole 11Rb3 is provided in the upper front portion. ing. A resin member 11Rb4 is attached to the outer peripheral edge of the recess 11Rb1 to soften the strike of the lower right base plate 11Rb against the striker 8 and prevent the generation of abnormal noise. When the upper right base plate 11Ra and the lower right base plate 11Rb are overlapped at a predetermined position, the hook shaft hole 11Ra12 and the hook shaft hole 11Rb2 are aligned, and the pole shaft hole 11Ra13 and the pole shaft hole 11Rb3 are aligned. Is formed. The upper left base plate 11La and the lower left base plate 11Lb overlapped at a predetermined position are, with respect to the upper right base plate 11Ra and the lower right base plate 11Rb overlapped at a predetermined position, a hook shaft pin 12P and a pole shaft pin 13P, which will be described later. Are connected by Thereby, the upper left base plate 11La and the lower left base plate 11Lb are assembled to the left end portion of the standing wall portion 11Ra2 while maintaining a space with respect to the upper right base plate 11Ra and the lower right base plate 11Rb. The hook shaft pin 12P and the pole shaft pin 13P are attached perpendicularly to the left base plate 11L and the right base plate 11R. A hook 12 and a pole 13 are disposed in a space between the left base plate 11L and the right base plate 11R, as will be described later. A round pipe-shaped spacer 18 is disposed between the peripheral edge of the attachment hole 11La11 of the upper left base plate 11La and the peripheral edge of the attachment hole 11Ra11 of the upper right base plate 11Ra. Then, the striker 8 is received by a bolt (not shown) passed through the inner cylinder portion of the spacer 18 with the recesses 11Lb1 and the recesses 11Rb1 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 11Ra2, a spring locking hole 11Ra21 in which one end portion of a coil spring 15S described later is locked is provided.

  As shown in FIG. 3 to FIG. 6 and FIG. 17, the hook 12 is a plate-shaped member that is hooked with respect to the base plate 11 by a hook shaft pin 12P that is passed through a shaft pin hole 12H provided in a substantially central portion. It is attached so that it can rotate around the pin 12P. Specifically, as shown in FIG. 17, the left end portion of the hook shaft pin 12P that rotatably supports the hook 12 is passed through the hook shaft hole 11La12 and the hook shaft hole 11Lb2 of the left base plate 11L and fixed by caulking. Yes. The right end portion of the hook shaft pin 12P that rotatably supports the hook 12 is passed through the hook shaft hole 11Ra12 and the hook shaft hole 11Rb2 of the right base plate 11R and fixed by caulking. The hook 12 includes a hook portion 12a that opens rearward and upward in a side view. From the hook portion 12a to the peripheral portion of the shaft pin hole 12H, it is formed as a thick portion 12b having a large thickness, and the side facing the pole 13 other than the thick portion 12b and spaced from the shaft pin hole 12H has a thick portion. It is formed as a thin portion 12c that is about 1/2 of 12b. The thick part 12b and the thin part 12c are formed in steps. In the thin portion 12c, an upper end protrusion 12c1 protruding in a direction away from the shaft pin hole 12H is formed at the upper end of the hook portion 12a on the opening side. Further, the thin portion 12c is provided with a protrusion 12c2 protruding above the hook portion 12a in a direction away from the shaft pin hole 12H, and a surface facing the lower pole 13 of the protrusion 12c2 is the first locking surface portion 12c3. It is formed as. In addition, an arc-shaped second locking surface portion 12c4 centering on the axis of the shaft pin hole 12H is formed adjacent to the lower side of the first locking surface portion 12c3. That is, as viewed from the side, a first end surface portion 12c6 is formed at the outer peripheral end of the thin portion 12c, and a first locking surface portion 12c3 and a second locking surface portion 12c4 are formed in the first end surface portion 12c6. . In the thick portion 12b, the end of the thick portion 12b on the side facing the pole 13 is formed as a second end surface portion 12b1 that rises vertically from the right side surface of the thin portion 12c to the right in a side view. . The second end surface portion 12b1 includes a bulging portion 12b11 that bulges in the direction of the protruding portion 12c2 in a side view, and a front surface of the bulging portion 12b11 is formed as a cam contact surface portion 12b12. That is, the cam contact surface portion 12b12 is formed in the second end surface portion 12b1. Further, the hook 12 has an annular shape that urges the hook 12 to rotate with respect to the left base plate 11L around the hook shaft pin 12P in a counterclockwise direction in FIG. 6 (in a direction to release the engagement with the striker 8). A hook spring locking portion (not shown) for locking one end portion of the hook spring 12S is provided. One end of the hook spring 12S is locked to the hook spring locking portion of the hook 12 and the other end is hook hook locking portion of the left base plate 11L in a state where the hook shaft pin 12P is disposed in the ring. (Not shown) is disposed and locked. By the rotation of the hook 12, the hook portion 12a can be engaged with or released from the striker 8 received in the recess 11Lb1 and the recess 11Rb1 of the base plate 11. As shown in FIG. 6, in a state where the hook portion 12a is engaged with the striker 8, the striker 8 is sandwiched between the hook portion 12a and the concave portion 11Lb1 and the concave portion 11Rb1 to be in a locked state. Here, the hook shaft pin 12P corresponds to a “hook shaft” in the claims.

  As shown in FIGS. 3 to 6 and 17, the pole 13 is a plate-like member having a thickness similar to that of the thin portion 12 c of the hook 12, and a shaft pin hole 13 </ b> H is provided at a substantially central portion. The pole 13 is attached to the base plate 11 so as to be rotatable around the pole shaft pin 13P by a pole shaft pin 13P passed through the shaft pin hole 13H. Specifically, as shown in FIG. 17, the left end portion of the pole shaft pin 13P that rotatably supports the pole 13 is formed in a pole shaft hole 11La13 of the upper left base plate 11La and a pole shaft hole 11Lb3 of the lower left base plate 11Lb. Threaded and fixed. A washer 19 is disposed between the pole 13 and the lower left base plate 11Lb. The washer 19 is for the pole 13 to be disposed at the same position in the direction of the pole shaft pin 13P with respect to the thin portion 12c of the hook 12. Further, the right end portion of the pole shaft pin 13P that rotatably supports the pole 13 is passed through and fixed to the pole shaft hole 11Ra13 of the upper right base plate 11Ra and the pole shaft hole 11Rb3 of the lower right base plate 11Rb. The pole 13 includes a locking end portion 13 a on the side facing the hook 12. The locking end portion 13a is positioned so as to be engageable with the first locking surface portion 12c3 of the hook 12 engaged with the striker 8 and brought into a locked state. A first arm portion 13b extending in the radial direction is provided on the opposite side to the locking end portion 13a with the shaft pin hole 13H interposed therebetween, and a cam contact pin 13e is provided on the first arm portion 13b with respect to the pole 13. It is vertically fixed and extends in the right direction (the direction of the right base plate 11R). The cam contact pin 13e is disposed in a state where the right end portion side thereof does not contact the right base plate 11R. A second arm portion 13c extending in the radial direction from the shaft pin hole 13H is provided substantially vertically upward with respect to the locking end portion 13a and the first arm portion 13b. A pin hole 13c1 penetrating in the plate thickness direction for fixing the pole pin 13f is provided on the distal end side in the radial direction of the second arm portion 13c, and the pole pin 13f is perpendicular to the pole 13 in the left direction in the pin hole 13c1. It extends and is fixed (in the direction of the left base plate 11L). As will be described later, the pole pin 13f passes through the pole pin hole 11La14 of the upper left base plate 11La so as to protrude leftward from the left surface of the upper left base plate 11La. A portion of the pole pin 13f that protrudes to the left from the left surface of the upper left base plate 11La is passed through the pole pin hole 16c of the release lever 16 and is slidable. Thus, the pole 13 is urged to rotate clockwise around the pole shaft pin 13P in FIG. 6 by the urging force applied to the pole pin 13f from the release lever 16 through the pole pin hole 16c. A hook sliding surface portion 13g extending in the direction of the pole shaft pin 13P from the lower end portion of the locking end portion 13a of the pole 13 is formed. Here, the pole shaft pin 13P and the pole pin 13f correspond to a “pole shaft” and a “projection” in the claims, respectively.

  As shown in FIGS. 3 to 6 and 17, the cam 14 is a plate-like member that is attached between the pole 13 and the right base plate 11 </ b> R so as to be rotatable around the pole shaft pin 13 </ b> P. The cam 14 and the pole 13 can be individually rotated around the pole shaft pin 13P. The cam 14 includes a disc-shaped base portion 14a having a cam shaft hole 14H provided in the center in a side view, and a cam portion connected to the base portion 14a by a pair of connecting portions 14c extending in the radial direction from the cam shaft hole 14H. 14b. In a portion surrounded by the base portion 14a, the pair of connecting portions 14c, and the cam portion 14b, a curved long hole-shaped reduction hole 14d penetrating in the plate thickness direction is formed. The thickness of the cam 14 is approximately the same as that of the second end surface portion 12 b 1 of the hook 12. Three arc-shaped protrusions 14a1 projecting leftward (in the direction of the pole 13) are provided at equal intervals on the outer peripheral end of the base part 14a. The protruding portion 14a1 is for the left end, which is the tip thereof, to come into contact with the pole 13 so that the pole 13 and the cam 14 can be relatively rotated around the pole shaft pin 13P. Further, a pole abutting portion 14a2 is provided at the outer peripheral end portion of the base portion 14a so as to protrude downward in the radial direction from the cam shaft hole 14H in FIG. The pole contact portion 14 a 2 is formed so as to be able to contact the cam contact pin 13 e of the pole 13. The lower side of the end surface of the cam portion 14b opposite to the reduction hole 14d is formed as a substantially arc-shaped hook contact surface 14b1 centering on the center of the cam shaft hole 14H. Specifically, the hook contact surface 14b1 gradually pushes the cam contact surface portion 12b12 of the hook 12 toward the far side as the clockwise rotation in FIG. 6 centering on the pole shaft pin 13P of the cam 14 is performed. It is a curved surface shape having a certain driving angle. On the upper side of the end surface of the cam portion 14b opposite to the light reducing hole 14d, a substantially arc-shaped projection portion 14b2 protruding in the left direction (the direction of the pole 13) is provided. The protrusion 14b2 is also for the left end, which is the tip, abutting against the pole 13 so that the pole 13 and the cam 14 can be relatively rotated around the pole shaft pin 13P. On the lower end side of the cam portion 14b, an urging plate abutting pin 14e is fixed to the cam 14 so as to extend in the right direction (the direction of the right base plate 11R). The urging plate abutting pin 14e of the cam 14 is arranged in a state where the right end side thereof does not abut on the right base plate 11R. As a result, the cam 14 is returned to the hook 12 by the pole 13 and the rotation thereof is regulated as the rotation of the biasing plate contact pin 14e is received by the biasing force of the biasing plate 15 described later. From this position, it is pushed around in the direction of further rotation. Then, the gap between the hook portion 12a of the hook 12 and the concave portion 11Lb1 and the concave portion 11Rb1 of the base plate 11 is filled, and the striker 8 is held so as not to rattle.

  As shown in FIGS. 3 to 6 and FIG. 17, the urging plate 15 is a plate-like member having the same thickness as the cam 14, and rotates around the hook shaft pin 12 </ b> P between the hook 12 and the right base plate 11 </ b> R. Installed as possible. The urging plate 15 and the hook 12 can be individually rotated around the hook shaft pin 12P. The urging plate 15 is provided with a urging plate shaft hole 15H at the center portion in a side view, a cam abutting arm portion 15b is provided on the front side facing the cam 14, and the urging plate shaft of the cam abutting arm portion 15b. On the opposite side across the hole 15H, a spring locking arm portion 15c is provided. A coil spring 15S is hung between the spring locking arm portion 15c and the spring locking hole 11Ra21 of the upper right base plate 11Ra so that the biasing plate 15 is centered around the hook shaft pin 12P with respect to the left base plate 11L. Is biased counterclockwise. A smoothly curved cam contact surface portion 15b1 is provided on the lower side of the cam contact arm portion 15b, and the cam contact surface portion 15b1 contacts the urging plate contact pin 14e of the cam 14 and presses the cam. In FIG. 6, 14 is rotated clockwise around the pole shaft pin 13P.

  As shown in FIGS. 3 to 5, the release lever 16 is a plate-like member having a thickness similar to that of the cam 14, and has a substantially semicircular shape with a forward arc when viewed from the side (viewed from the direction in which the pole shaft pin 13 </ b> P extends). It has a circular shape. On the upper end side of the release lever 16, the release lever 16 extends around the release lever shaft pin 17 through the release lever shaft pin 17 extending to the left perpendicular to the upper left base plate 11 La and disposed in the release lever shaft hole 11 La 15. Is provided with a release lever shaft hole 16a. Further, on the lower end side of the release lever 16, a connection hook shaft hole 16b for attaching a connection hook shaft pin 22P for pivotally supporting a connection hook 22 described later is provided. One end of a torsion coil spring 16S for biasing the release lever 16 about the release lever shaft pin 17 counterclockwise in FIG. 5 is provided at an intermediate portion between the release lever shaft hole 16a and the connecting hook shaft hole 16b. 16d is provided with a spring locking hole 16d. Further, the release lever 16 is provided with a pole pin hole 16c that is a long hole that is curved and extends along the outer peripheral edge portion with the spring locking hole 16d as an inner side. The pole pin hole 16c is formed so that the pole pin 13f can slide therein. The torsion coil spring 16S is disposed around the release lever shaft pin 17 between the upper left base plate 11La and the upper right base plate 11Ra, and the other end of the torsion coil spring 16S is a spring engagement provided on the upper right base plate 11Ra. It is locked to a stop hole (not shown). Further, a connecting hook convex portion abutting portion 16e extending in the radial direction is provided in a portion radially away from the release lever shaft pin 17 from the connecting hook shaft hole 16b. Here, the pole pin hole 16c corresponds to a “long hole” in the claims. Further, the release lever shaft pin 17 corresponds to a “release lever shaft” in the claims.

  As shown in FIGS. 3 to 5, the connecting hook 22 is a plate-like member having a thickness similar to that of the pole 13 and is substantially U-shaped and opened upward in a side view (viewed from the extending direction of the pole shaft pin 13 </ b> P). It has a shape. A connection hook 22 is connected to the upper end portion of the connection hook 22 so that the connection hook 22 can be rotated around a connection hook shaft pin 22P extending perpendicularly to the release lever 16 and disposed in the connection hook shaft hole 16b. A hook shaft pin hole 22a is provided. Further, on the lower end portion side of the connection hook 22, an engagement portion 22 b that can be engaged from below with a connection pin 21 a of the operation lever 21 described later is provided. The engaging portion 22b is formed with a front inclined surface portion 22b1 that is a front inclined surface portion and a rear inclined surface portion 22b2 that is a rear inclined surface portion. Further, in the vicinity of the connecting hook shaft pin hole 22a of the connecting hook 22, a convex portion 22c protruding rightward (in the direction of the release lever 16) is provided. Between the connection hook 22 and the release lever 16, a torsion coil spring 22S is arranged to urge the connection hook 22 to rotate around the connection hook shaft pin 22P in the clockwise direction in FIG. It is installed. The protrusion 22c of the connection hook 22 abuts on the connection hook protrusion abutment portion 16e of the release lever 16 so that the rotation of the connection hook 22 relative to the release lever 16 is stopped. Here, the connecting hook shaft pin 22P corresponds to a “connecting hook shaft” in the claims.

  As shown in FIGS. 3 to 5, the operation lever 21 is a plate-like member having the same thickness as the release lever 16 and has a substantially rectangular shape in a side view (viewed from the direction in which the pole shaft pin 13 </ b> P extends). Yes. On the upper end side of the operation lever 21, an operation lever shaft hole 21 b is provided through which the operation lever 21 can be rotated around the release lever shaft pin 17 through the release lever shaft pin 17. Further, on the lower end side of the operation lever 21, a cable connection hole 21c, which is a long hole for connecting the operation cable 20 for rotating the operation lever 21 around the release lever shaft pin 17 from the front side, is provided. Yes. A connecting pin hole 21d for inserting and supporting the left end of the connecting pin 21a is provided in a portion near the cable connecting hole 21c between the operation lever shaft hole 21b and the cable connecting hole 21c. The connecting pin 21a extends from the operation lever 21 to the right (in the direction of the release lever 16). Further, a cylindrical roller 21a1 is disposed on the connecting pin 21a so as to be rotatable with respect to the connecting pin 21a. Between the operation lever 21 and the upper left base plate 11La, a torsion coil spring 21S for biasing the operation lever 21 around the release lever shaft pin 17 counterclockwise in FIG. One end portion of the torsion coil spring 21S is locked to the spring locking portion 21e of the operation lever 21, and the other end portion of the torsion coil spring 21S is locked to the spring locking hole 11La18 of the upper left base plate 11La.

  The operation of the locking device 7 will be described with reference to FIGS. 5 and 6 show a locked state of the locking device 7 when the automobile seat 1 is in a use state (FIG. 1) in which an occupant can be seated. The hook portion 12a of the hook 12 holds the striker 8 between the recess 11Lb1 and the recess 11Rb1 of the base plate 11. The pole 13 is pivotally biased clockwise in FIG. 5 around the pole shaft pin 13P by the pivotal biasing force applied from the release lever 16 via the pole pin 13f, and the rear lower end of the locking end portion 13a. The portion abuts on the second locking surface portion 12c4 of the hook 12 and the rotation is stopped. At this time, the pole pin 13f is located on the upper end side of the pole pin hole 16c. Further, the locking end portion 13 a of the pole 13 is in a state where a gap is formed so as to face the first locking surface portion 12 c 3 of the hook 12. The cam 14 has a rotational biasing force applied from the biasing plate 15 as the pressing force is reduced by the cam contact pin 13e as the pole 13 pivots clockwise in FIG. 6 about the pole shaft pin 13P. Is urged to rotate clockwise in FIG. The cam 14 presses the hook contact surface 14b1 against the cam contact surface portion 12b12 of the hook 12 and gradually pushes the cam contact surface portion 12b12 of the hook 12 to the far side, so the hook 12 is centered on the hook shaft pin 12P. In FIG. 6, it rotates clockwise. Thus, the gap between the hook portion 12a and the recess 11Lb1 and the recess 11Rb1 of the base plate 11 is filled. When the normal vehicle seat 1 is used, it is held against the floor FL without backlash, and when the cam 14 is deformed due to excessive force input due to a rear impact or the like, the locking end portion of the pole 13 is retained. 13a engages with the first locking surface portion 12c3 of the hook 12 and strongly holds it against the floor FL.

  When the seat back 3 is lowered from the standing position toward the folded position overlapped with the seat cushion 2, the operation lever 21 is moved by the operation cable 20 having one end locked in the cable connection hole 21c. Tow forward. Then, as shown in FIGS. 7 and 8, since the rear inclined surface portion 22b2 of the engaging portion 22b of the connecting hook 22 is engaged with the connecting pin 21a of the operation lever 21 via the roller 21a1, the connecting pin 21a is connected. The release lever 16 is also pulled forward by the outer peripheral edge of the connecting hook shaft hole 16b via the hook 22. As a result, the release lever 16 is rotated clockwise in FIG. 7 against the biasing force of the torsion coil spring 16S around the release lever shaft pin 17. Along with this, the pole pin 13f of the pole 13 slides downward in the pole pin hole 16c of the release lever 16, so that the pole 13 rotates around the pole shaft pin 13P counterclockwise in FIG. To do. At this time, the cam 14 is rotated counterclockwise in FIG. 8 against the rotation urging force by the urging plate 15 because the pole abutting portion 14a2 is pressed by the cam abutting pin 13e of the pole 13. To do. As a result, the force of pressing the hook contact surface 14b1 against the cam contact surface portion 12b12 of the hook 12 and gradually pushing away to the far side is reduced, and the distance between the hook portion 12a and the recesses 11Lb1 and 11Rb1 of the base plate 11 is reduced. The state where the gap is filled is released. When the hook contact surface 14b1 of the cam 14 is separated from the cam contact surface portion 12b12 of the hook 12, the hook 12 is rotated clockwise in FIG. 8 by the rotation biasing force of the hook spring 12S to engage with the striker 8. To release. Then, the first locking surface portion 12c3 of the hook 12 contacts the locking end portion 13a of the pole 13, and the clockwise rotation of the hook 12 in FIG. When the pole 13 further rotates counterclockwise in FIG. 7 about the pole shaft pin 13P, the first locking surface portion 12c3 of the hook 12 is separated from the locking end portion 13a of the pole 13, and the hook 12 is hook spring. By the rotation biasing force by 12S, it rotates counterclockwise in FIG. 7, and the engagement with the striker 8 is completely released. 7 and 8 show a state where the hook 12 is completely disengaged from the striker 8. At this time, the pole pin 13 f of the pole 13 is positioned slightly above the center portion of the pole pin hole 16 c of the release lever 16.

  When the seat back 3 is further lowered toward the folding position where the seat back 3 is overlapped with the seat cushion 2, the operation lever 21 is moved forward by the operation cable 20 having one end locked in the cable connection hole 21c. It is pulled toward. Then, as shown in FIGS. 9 and 10, the release lever 16 that is rotated together with the operation lever 21 in the clockwise direction in FIG. 9 is a stopper in which the connecting hook convex portion contact portion 16e is disposed on the upper left base plate 11La. The rotation is stopped by contacting the pin 11La16. From this state, when the seat back 3 is further lowered toward the folding position where the seat back 3 is overlapped with the seat cushion 2, the operation lever 21 is pulled forward by the operation cable 20 and turned clockwise in FIG. Rotate. As a result, the engaging portion 22b of the connecting hook 22 moves downward while the roller 21a1 of the connecting pin 21a moves while the contact portion with the rear inclined surface portion 22b2 engaged with the connecting pin 21a moves. The connecting hook 22 is pushed down and rotates counterclockwise in FIG. When the connecting pin 21a gets over the upper end portion of the rear inclined surface portion 22b2 of the engaging portion 22b, the engagement between the engaging portion 22b and the connecting pin 21a is released. At this time, as shown in FIG. 10, the state of the hook 12, the pole 13, the cam 14, and the biasing plate 15 is the same as the state of FIG.

  The state of the lock mechanism 10 shown in FIGS. 11 and 12 is a state when the seat back 3 is in the folded position where the seat back 3 is overlapped with the seat cushion 2. In this state, the car seat 1 can be brought into the retracted state shown in FIG. The operation lever 21 is pulled forward by the operation cable 20 and is in a state of rotating most clockwise around the release lever shaft pin 17 in FIG. The release lever 16 is rotated counterclockwise about the release lever shaft pin 17 in FIG. 11 by the biasing force of the torsion coil spring 16S when the engagement of the connection hook 22 with respect to the connection pin 21a is disengaged, and the pole pin hole 16c. The front end edge of the slidably contacts the pole pin 13f, and the rotation is stopped. The pole pin 13f is prevented from rotating because the hook sliding surface 13g of the pole 13 is in contact with the upper surface of the protrusion 12c2 of the hook 12. At this time, the connecting hook 22 is rotated counterclockwise around the connecting hook shaft pin 22P in FIG. 11 by the urging force of the torsion coil spring 22S, and the convex portion 22c is the connecting hook convex portion abutting portion 16e of the release lever 16. The rotation is stopped by coming into contact with. At this time, as shown in FIG. 12, the state of the hook 12, the pole 13, the cam 14, and the urging plate 15 is the same as the state of FIGS.

  The locking device 7 shown in FIGS. 13 and 14 is configured to rotate the vehicle seat 1 toward the floor FL from the retracted state while the seat back 3 is in the folded position where the seat back 3 is overlapped with the seat cushion 2. 7 is in a locked state. When the lock mechanism 10 is moved closer to the striker 8, the striker 8 enters the recess 11Lb1 and the recess 11Rb1 of the base plate 11 and comes into contact with and presses the lower surface portion of the upper end protrusion 12c1 of the hook 12 positioned there. As a result, the hook 12 pivots clockwise in FIG. 14 about the hook shaft pin 12P, and finally the hook portion 12a holds the striker 8 with respect to the recess 11Lb1 and the recess 11Rb1 as shown in FIG. It becomes. When the hook 12 pivots clockwise in FIG. 14 around the hook shaft pin 12P, the upper surface portion of the protrusion 12c2 of the hook 12 slides in a state of being in contact with the hook sliding surface portion 13g of the pole 13. To go. When the front end of the upper surface of the protrusion 12c2 of the hook 12 of the hook 12 is disengaged from the pole 13, the pole 13 rotates clockwise in FIG. 14 about the pole shaft pin 13P, and the locking end of the pole 13 The lower end of 13a abuts on the second locking surface portion 12c4 of the hook 12, and the rotation is stopped. As a result, the locking end portion 13a of the pole 13 is opposed to the first locking surface portion 12c3 of the hook 12, and a gap is formed. The cam 14 is a rotational biasing force applied from the biasing plate 15 as the pressing force is reduced by the cam contact pin 13e due to the pole 13 pivoting clockwise in FIG. 14 about the pole shaft pin 13P. Thus, it rotates clockwise in FIG. The cam 14 presses the hook contact surface 14b1 against the cam contact surface portion 12b12 of the hook 12 and gradually pushes the cam contact surface portion 12b12 of the hook 12 to the far side, so the hook 12 is centered on the hook shaft pin 12P. In FIG. 14, it rotates clockwise. That is, as shown in FIG. 14, the state of the hook 12, the pole 13, the cam 14, and the biasing plate 15 is the same as the state of FIG. Thus, the gap between the hook portion 12a and the recess 11Lb1 and the recess 11Rb1 of the base plate 11 is filled. The vehicle seat 1 can secure the stability of the traveling vehicle seat 1 by keeping the vehicle seat 1 locked to the floor FL while holding the seat back 3 in the folded position. it can.

  The lock device 7 shown in FIG. 15 and FIG. 16 is rotated by moving the vehicle seat 1 toward the floor FL from the retracted state while the seat back 3 is in the folded position where the seat back 3 is overlapped with the seat cushion 2. This is a state in which the seat back 3 is in the upright position while 7 is in a locked state. When the forward pulling by the operation cable 20 is released, the operation lever 21 is rotated counterclockwise around the release lever shaft pin 17 in FIG. Then, the connecting pin 21a contacts the front inclined surface portion 22b1 of the connecting hook 22 pivotally supported by the release lever 16 via the roller 21a1, and the contact position of the roller 21a1 with respect to the front inclined surface portion 22b1 as the operation lever 21 rotates. The connecting hook 22 rotates counterclockwise around the connecting hook shaft pin 22P in FIG. 15 so as to move. When the connecting pin 21a gets over the upper end portion of the front inclined surface portion 22b1, the connecting hook 22 is rotated clockwise around the connecting hook shaft pin 22P in FIG. 15 by the urging force of the torsion coil spring 22S. As a result, the connecting pin 21a returns to the initial state shown in FIGS. 5 and 6 in which the rear inclined surface portion 22b2 is engaged from below via the roller 21a1.

  The present embodiment configured as described above has the following operational effects. The pole pin hole 16c of the release lever 16 is rotated in a direction in which the pole 13 is engaged with the hook 12 by the rotation of the release lever 16 in the direction in which the release lever 16 is urged to rotate by the slidable engagement with the pole pin 13f. It is formed to do. Further, the pole pin hole 16c is provided in the release lever 16 at a position between the release lever shaft hole 16a and the connecting hook shaft hole 16b. That is, in the release lever 16, the distance from the release lever shaft hole 16a to the connecting hook shaft hole 16b is longer than the distance from the release lever shaft hole 16a to the pole pin hole 16c. Thus, in a state where the pole 13 is engaged with the hook 12, the release lever 16 is rotated with a force smaller than the force by which the release lever 16 presses the pole 13 in the direction in which the pole 13 is engaged with the hook 12. Thus, the engagement of the pole 13 with the hook 12 can be released. Further, when the seat back 3 is turned to the folding position from the locked state where the seat back 3 is in the standing position and the hook 12 holds the striker 8, the pole 13 is rotated via the operation lever 21 and the release lever 16. Thus, 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 lock mechanism 10 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 locked, and the pole 13 is released. The locking force is maintained by engaging with the hook 12 by the rotational biasing force of the lever 16. 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. As a result, even if the rotational biasing force with which the pole 13 engages with the hook 12 is increased, an increase in the operating force for releasing the lock state of the lock device 7 is suppressed, and the seat back 3 is folded. Thus, it is possible to provide the lock device 7 that can be locked when the device is in the state.

  The base plate 11 is formed by assembling a space between the left base plate 11L and the right base plate 11R. A hook 12 and a pole 13 are disposed between the left base plate 11L and the right base plate 11R, and a release lever 16 and an operation lever 21 are disposed on the surface of the left base plate 11L opposite to the right base plate 11R. As a result, the hook 12, the pole 13, the release lever 16, and the operation lever 21 can be separately provided on both sides of the left base plate 11L, so that the release lever shaft pin 17 is disposed with respect to the hook shaft pin 12P and the pole shaft pin 13P. The degree of freedom increases.

  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 following can be mentioned.

  1. In the above embodiment, the left base plate 11L is formed of the left upper base plate 11La and the lower left base plate 11Lb in the base plate 11, but may be formed as a single unit. The same applies to the right base plate 11R.

  2. In the above embodiment, the torsion coil spring 16S is used to urge the release lever 16 and the torsion coil spring 21S is used to urge the operation lever 21. However, the present invention is not limited to this, and a tension coil spring may be disposed between the release lever 16 and the base plate 11 to be urged, or a tension coil spring may be disposed between the operation lever 21 and the base plate 11. May be energized.

  3. Although the present invention is applied to an automobile seat, it 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 7 Lock device 8 Striker 10 Lock mechanism 11 Base plate 11L Left base plate (base plate, plate material)
11La14 Pole pin hole (through hole)
11Lb1 Recess 11R Right base plate (base plate, plate material)
11Rb1 Recess 12 Hook 12P Hook shaft pin (hook shaft)
13 pole 13f pole pin (protrusion)
13P Pole shaft pin (pole shaft)
16 Release lever 16c Pole pin hole (long hole)
17 Release lever shaft pin (Release lever shaft)
21 operation lever 21a connecting pin 22 connecting hook 22P connecting hook shaft pin (connecting hook shaft)
FL floor (vehicle body)

Claims (2)

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 base plate having a recess capable of receiving the striker and a hook shaft perpendicular to the base plate, and the striker is pushed by the movement into the recess to rotate. A hook capable of forming a locked state in which the striker is sandwiched between the recessed portion and an unlocked state in which the striker is not sandwiched, and a hook which is urged to rotate in a direction to form the unlocked state, and a pole perpendicular to the base plate 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 perpendicular to the base plate and the release. A shaft that can be rotated by a connecting hook shaft provided in parallel with the release lever shaft at a position separated from the lever shaft. A release lever having a connection hook, and a connection pin that is pivotally supported by the release lever shaft so as to rotate together with the release lever by engaging the connection hook. An operation lever having
The pole has a protrusion erected in parallel with the pole axis at a position spaced radially from the pole axis,
The release lever is a plate-like member, and has a long hole that is provided at a position between the release lever shaft and the connection hook shaft, extends in a curved manner, and slidably engages with the protrusion. And
The elongated hole is configured such that when the release lever rotates in a direction in which the release lever is urged to rotate, the protrusion is slidably contacted with a peripheral edge to rotate the pole in a direction to engage the hook. ,
The operation lever is urged to rotate in the same direction as the release lever,
The connection hook is urged to rotate in a direction to engage with the connection pin;
When the seat back is rotated to the folding position while the seat back is in the standing position and the pole is holding the hook in the locked state, the connecting hook is urged to rotate the release lever. 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 rotation of the operating lever in the direction against the rotation bias, and the pole is Rotate in a direction to disengage the hook and rotate in a direction in which the hook forms the unlocked state;
When the operation lever is rotated by a predetermined angle, the connection hook is rotated in a direction to disengage from the connection pin, the engagement is released, the release lever is returned to the locked position, and the hook is rotated. A vehicle seat locking device configured to be allowed to engage with the hook by its biasing force when moved into the locked state. The base plate according to claim 1, wherein the base plate is formed of two plate members arranged to face each other.
The hook and the pole are disposed between the two plates,
The release lever and the operation lever are disposed on a surface opposite to the other of the two plate members,
A vehicle seat locking device in which the projection of the pole is slidably engaged with the elongated hole of the release lever through a through hole provided in the one of the two plates.

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