JP5515457B2 - Vehicle seat locking device - Google Patents

Description

  The present invention relates to a vehicle seat locking device that locks components such as a seat back constituting a vehicle seat at a fixed position in the vehicle.

  A vehicle seat on which a passenger is seated is installed in a vehicle such as an automobile. The vehicle seat includes a seat cushion on which an occupant is seated and a seat back that is a backrest of the seated occupant as components constituting the vehicle seat. As a seat back as a component constituting such a vehicle seat, there is known a seat back provided with a lock device for locking the seat back at a fixed position appropriately set in the vehicle. This locking device is adapted to be engaged with a striker disposed in the vehicle, and by this engagement, the seat back can be locked at a fixed position set appropriately.

  On the other hand, the vehicle seat provided with the lock device described above is provided with an operation lever for releasing the engagement state between the striker and the lock device. This operating lever is connected to the locking device via a connecting cable, and when this operating lever is rotated, the connecting cable is moved to release the engagement state with the striker of the locking device, Accordingly, the seat back is unlocked at the fixed position. Note that when the seat back is unlocked, the seat back can be moved forward or the like.

  On the other hand, there are cases in which a heavy load such as a wine case is loaded on the rear side of the vehicle seat in an automobile in which the vehicle seat is installed. When an automobile loaded with such a heavy load suddenly stops, the load may collide with the vehicle seat located on the front side, and suddenly impact the vehicle seat. Then, an inertial force is generated in the vehicle seat due to the received impact. Then, the inertial force causes the above-described operation lever (including a member connected to the operation lever) to rotate freely, and the engagement state of the lock device with the striker is released. Otherwise, the seat back may be unlocked without permission.

  Therefore, in order to improve such a problem that the lock is released without permission, there is known a technique provided with a lever rotation restricting mechanism for restricting the rotation of the operation lever at the initial position before the rotation operation. (For example, refer to Patent Document 1). In this disclosed technique, when the operation lever is rotated, an operation is performed to release the rotation restriction of the lever rotation restriction mechanism (pressing the push button in Patent Document 1). In addition, it is possible to prevent the seat back from being unlocked.

JP2007-137170A

  However, in the technology provided with the lever rotation restricting mechanism described above, when an occupant intends to rotate the operation lever, an operation for releasing the rotation restriction is also required. The problem remains that it is complicated and operability is poor.

  The present invention has been made in view of such circumstances, and a problem to be solved by the present invention is a vehicle that locks components such as a seat back constituting a vehicle seat at a fixed position in the vehicle. An object of the present invention is to improve the operability when the occupant releases the lock while preventing the lock from being released arbitrarily.

In solving the above-described problems, the vehicle seat locking device according to the present invention employs the following means.
In other words, the vehicle seat locking device according to the first aspect of the present invention is disposed in the vehicle in order to lock components such as a seat back constituting the vehicle seat at a fixed position in the vehicle. A vehicle seat locking device installed in the component so as to be engaged with the striker, comprising: a base member fixedly installed in the component; and a hook for engaging the striker; The member includes a hook holding state for holding the hook at a position where the striker is engaged, and a hook free state for releasing the holding of the hook so as to release the engagement of the striker. A pole for switching the state of the hook is provided, and the state of the hook with respect to the striker is switched from the hook holding state to the hook free state. The pivoting operation of the handle is performed by the pivoting operation of the operating lever connected to the pole, and the side opposite to the side where the operating lever is connected from the pivot center of the pole. The inertial mass to the end of the pole is set to be larger than the inertial mass from the pivot center of the pole to the operation lever.
The “inertial mass” here means a mass on which an inertial force generated by sudden impact is dependent.

According to this vehicle seat locking device, the inertial mass from the pivot center of the pole to the end of the pole on the side opposite to the side to which the operation lever is connected is the inertia mass from the pivot center of the pole to the control lever. Since it is set so as to be larger than the mass, even if the vehicle seat receives a sudden impact such as when a load hits the vehicle seat, the inertia caused by this sudden impact Compared to the inertial force from the center of rotation of the pole to the control lever, the force of inertia from the center of rotation of the pole to the end of the pole opposite to the side where the control lever is connected is Increased by the difference in inertial mass. That is, the inertial force to rotate in the direction to maintain the engagement with the striker is larger than the inertial force to rotate in the direction in which the engagement with the striker is released.
As a result, even when the vehicle seat receives a sudden impact, such as when a load hits the vehicle seat as described above, the operation lever is operated by the inertial force generated by the sudden impact. It is intended to rotate in the direction opposite to the rotation operation direction. In other words, as before, the operating lever can be turned freely, releasing the engagement state of the locking device with the striker and preventing the components from being unlocked without the intention of the occupant. Will be able to do.
In addition, when the occupant intentionally rotates the operation lever, unlike the above-described sudden impact, the occupant slowly rotates, so the occupant must apply inertial force as described above to the pole. The operating lever can be operated to rotate without causing any trouble. In other words, the occupant can operate the locking device so as to release the engagement with the striker by a simple rotation operation without requiring a complicated operation as before, and the components such as the seat back can be locked. Can be released.
Thus, according to this vehicle seat locking device, the operability when the occupant releases the lock can be improved while the lock can be prevented from being released without permission.

A vehicle seat locking device according to a second aspect of the present invention is the vehicle seat locking device according to the first aspect of the invention, wherein the vehicle seat locking device is on the opposite side of the pivot center of the pole from the side to which the operating lever is connected. The inertial mass up to the end of the pole is formed by bulking the end of the pole opposite to the side to which the operating lever is connected with respect to the pivot center of the pole. It is set so that it may become large compared with the inertial mass from the rotation center to this operation lever.
According to this vehicle seat locking device, the end of the pole opposite to the side to which the operating lever is connected is formed to be bulky with respect to the pivot center of the pole. As a result, the inertial mass from the pivot center of the pole to the end of the pole on the side opposite to the side to which the operation lever is connected is larger than the inertial mass from the pivot center to the operation lever. Set to Therefore, compared to the previous configuration, only the shape of the pole on the side opposite to the side to which the operating lever is connected is changed, and as described above, the direction of the operating lever is opposite to the rotating operation direction. The inertial force of the pole to be rotated can be made larger than the inertial force of the operation lever or the like that causes the operation lever to rotate in the rotation operation direction.
Therefore, according to this vehicle seat locking device, it is possible to easily and effectively achieve the improvement in operability while preventing the lock from being arbitrarily released as described above. . In addition, the above-mentioned “form by making it bulky” is a comparative expression with respect to the previous shape.

According to the vehicle seat locking device according to the first aspect of the present invention, the operability when the occupant releases the lock can be improved while preventing the lock from being released without permission.
According to the vehicle seat locking device of the second aspect of the present invention, it is possible to easily and effectively achieve the improvement in operability while preventing the lock from being released without permission.

It is a perspective view which shows the vehicle seat installed in the motor vehicle as a vehicle. It is a side view which shows the locking device of the vehicle seat which is in the locked state at the time of side view. It is a disassembled perspective view shown about the hook, pole, and urging | biasing spring which comprise a locking device. It is a side view which shows the locking device of the vehicle seat which is a lock release state at the time of side view. It is sectional drawing which shows the locking device of the vehicle seat at the time of VV sectional view in FIG. It is an operation side view shown about operation of a locking device of a vehicular seat. It is a side view which shows the locking device of the vehicle seat which will be in the locked state at the time of side view used as another embodiment.

[First Embodiment]
DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, a first embodiment for carrying out the invention will be described with reference to the drawings.
FIG. 1 is a perspective view showing a vehicle seat 10 installed in an automobile as a vehicle.
That is, the vehicle seat 10 shown in FIG. 1 is a seat on which an occupant is seated, and the seat cushion 11 on which the occupant sits and the seat back that serves as the backrest of the seated occupant as constituent parts of the vehicle seat 10. 12.
The seat back 12 is rotatably connected to the seat cushion 11 via a connecting device 15, and the seat back 12 is tilted forward so that the seat back 12 is superimposed on the seat cushion 11. The position can be set to at least two positions. In other words, when the seat back 12 is positioned at a backrest position where the seat back becomes a backrest of the seated person, the vehicle seat 10 is configured to lock the seat back 12 at an appropriately set in-vehicle fixed position. Thus, when the seat back 12 is unlocked, the seat back 12 is in a movable state such as being moved forward. In the case where the seat back 12 is movable, such as when the seat back 12 is moved forward, the seat back 12 is normally positioned at the forward position where the seat back 12 is moved forward. Reference numeral 13 denotes a headrest that is installed on the upper portion of the seat back 12 and serves as a headrest for a seated occupant. Reference numeral 60 denotes a lever device that includes an operation lever 63 that will be described in detail later.

By the way, in order to lock the seat back 12 at the in-vehicle fixed position, the lock device 20 is engaged with the striker 19 disposed in the vehicle, thereby being locked at the in-vehicle fixed position.
The striker 19 is not shown in detail regarding the installation location, but is installed in the vehicle body frame that constitutes the vehicle. Specifically, the seat back 12 is positioned at the backrest position. In view of the position at which the seat back 12 is locked, it is installed so as to protrude toward the vehicle seat 10 arrangement side. Further, the locking device 20 is installed on the side portion in the width direction of the seat back 12, and specifically, a seat back frame (not shown in FIG. 2, etc., FIG. 5) constituting the seat back 12. In FIG.
FIG. 2 is a side view showing the locking device 20 of the vehicle seat 10 in a locked state when viewed from the side. FIG. 3 is an exploded perspective view showing the hook 30, the pole 40, and the biasing spring 50 that constitute the locking device 20. FIG. 4 is a side view showing the locking device 20 of the vehicle seat 10 in an unlocked state when viewed from the side. FIG. 5 is a cross-sectional view showing the locking device 20 of the vehicle seat 10 when viewed in a VV cross section in FIG. 2.
2 and 4, since the hook 30 and the pole 40 are disposed so as to overlap the base member 25, the hook 30 and the pole 40 are illustrated for easy understanding of the hook 30 and the pole 40. Is indicated by a thick line, and the base member 25 is indicated by a thin line.

As schematically shown in FIGS. 2 to 4, the lock device 20 includes a base member 25, a hook 30, a pole 40, a biasing spring 50, and a lever device 60.
As shown in FIG. 5, the base member 25 is fixedly installed with respect to the seat back frame M constituting the seat back 12, and supports the hook 30 and the pole 40 described below in a rotatable manner. It is. As shown in FIG. 5, the base member 25 is configured by combining base plates 25a and 25b divided into two. The base member 25 includes mounting holes 26 and 26 and a striker holding recess 27. Mounting bolts 28a and 28a are inserted into the mounting holes 26 and 26, respectively. The mounting bolts 28 a and 28 a cooperate with the mounting nuts 28 b and 28 b to fix the base member 25 to the seat back frame M constituting the seat back 12. The striker holding recess 27 is formed to have a recessed shape that is recessed so as to be cut out from the outer periphery of the base member 25 to substantially the center. Specifically, the striker holding concave portion 27 includes a striker holding portion 27a provided with a hole shape substantially in the center of the base member 25, and a guide groove shape from the outer periphery of the base member 25 to the striker holding portion 27a. The striker guide portion 27b is formed. The base member 25 is provided with rotation support holes 29a and 29b for supporting support pins 39 and 49 for rotatably supporting a hook 30 and a pole 40 described below in an inserted state.

The hook 30 is engaged with the striker 19 in cooperation with the base member 25 described above, and is rotatably supported by the support pin 39 supported by the base member 25 described above. That is, the hook 30 can be switched to two types of states depending on the rotation position of the pole 40 described later, and a hook holding state in which the hook 30 is held at a position where the striker 19 is engaged (shown in FIG. 2). State) and a hook-free state (state shown in FIG. 4) in which the holding of the hook 30 is released so that the striker 19 is disengaged.
Specifically, the hook 30 is formed to have a substantially ax shape, and generally includes a rotation support hole 31, a striker fitting receiving portion 32, a pole fitting receiving portion 33, and a spring locking portion 34. Configured. The rotation support hole 31 is provided at an intermediate portion of the hook 30 and is a portion through which the support pin 39 is inserted. That is, the hook 30 is rotatably supported with respect to the base member 25 by the support pin 39 inserted through the rotation support hole 31. For this reason, the support pin 39 inserted through the rotation support hole 31 is the center of rotation of the hook 30. The striker fitting receiving portion 32 is formed in a concave shape that matches the size of the striker 19 when the striker 19 is fitted. Further, the pole fitting receiving portion 33 is formed to have a concave shape matched to the shape and size of the fitting portion 44 of the pole 40 when the fitting portion 44 of the pole 40 described below is fitted and received. . The spring locking portion 34 is a portion for locking one end of an urging spring 50 which will be described later, and is disposed at a position opposite to the striker fitting receiving portion 32 with respect to the rotation support hole 31 described above. ing.
The hook 30 is configured to urge the rotation support hole 31 on the left side upward by the urging force of the urging spring 50 that locks the other end to the pole 40 side. The hook 30 is urged to rotate clockwise by urging upward on the left side of the hole 31. For this reason, when the lock device 20 is in a hook free state (the state shown in FIG. 4) in which the pole 40 releases the holding of the hook 30, the hook 30 is biased so as to rotate clockwise. Thus, the striker fitting receiving portion 32 releases the fitting of the striker 19.

The pole 40 is rotated according to the rotation operation of the operation lever 63 described later, and switches the state of the hook 30 (hook holding state, hook free state) described above.
Specifically, the pole 40 is formed to have a substantially U-shape, and roughly includes a rotation support hole 41, a lever connecting portion 42, a spring locking portion 43, a fitting portion 44, and a bulky portion. 45. The rotation support hole 41 is provided at an intermediate portion of the pole 40, and is a portion through which the support pin 49 is inserted. That is, the pole 40 is rotatably supported with respect to the base member 25 by the support pin 49 inserted through the rotation support hole 41. For this reason, the support pin 49 inserted through the rotation support hole 41 is the center of rotation of the pole 40. The lever connecting portion 42 is provided so as to protrude upward while being supported by the base member 25. This lever connecting portion 42 is a place where a connecting cable 64 to which an operation lever 63 described later is connected is connected. The spring locking portion 43 is provided at a location away from the rotation support hole 41 and is a location for locking the other end of the biasing spring 50 described above. The fitting portion 44 is a portion that is fitted to the pole fitting receiving portion 33 of the hook 30 described above, and has a convex shape that protrudes in a substantially triangular shape that exactly matches the concave shape of the pole fitting receiving portion 33. Has been. The bulking portion 45 is provided so as to be adjacent to the hook 30 when supported so as to be rotatable with respect to the base member 25, and the lever connecting portion 42 with respect to the rotation support hole 41 described above. It is arrange | positioned so that it may extend on the opposite side.
That is, the bulking portion 45 is formed by bulking the end portion of the pole 40 opposite to the lever coupling portion 42 side to which the operation lever 63 is coupled to the support pin 49 that is the pivot center of the pole 40. It is supposed to be. This “formed by being bulked” is a comparative expression with respect to a conventional shape, for example, a comparative expression with respect to a second embodiment described later. For this reason, the end of the pole 40 opposite to the lever connecting portion 42 side to which the operation lever 63 is connected with respect to the rotation center (position where the support pin 49 is disposed) coincides with the end of the bulky portion 45. Will be. Here, the bulk portion 45 has an inertial mass from the pivot center (position where the support pin 49 is disposed) of the pole 40 to the end of the bulk portion 45 from the pivot center of the pole 40 to the operation lever 63. It is set to be bulky in view of the fact that it becomes larger than the inertial mass (including the connecting cable 64). By the way, “inertial mass” here means a mass on which an inertial force generated by sudden impact is dependent.
The pole 40 is biased with the urging force of the urging spring 50 that engages one end thereof on the hook 30 side, and the left side of the illustrated rotation support hole 41 is biased downward. The pole 40 is urged to rotate counterclockwise by urging downward on the left side of 41. For this reason, the lever connecting portion 42 is biased so as to move to the left, and the connecting cable 64 connected to the lever connecting portion 42 is pulled, so that the operating lever 63 is positioned at the initial position before the rotating operation. It is supposed to be.

The urging spring 50 is formed of a so-called coil spring so that one end serving as the spring locking portion 34 on the hook 30 side and the other end serving as the spring locking portion 43 on the pole 40 side are brought close to each other. Energize. Therefore, as described above, the hook 30 is urged to rotate clockwise and the pole 40 is urged to rotate counterclockwise, so that the operation lever 63 is positioned at the initial position before the rotation operation. Will be energized as follows.
The lever device 60 is a device that performs an operation of releasing the engagement of the striker 19 by the lock device 20 described above, and is installed above the rear portion of the seat back 12 as shown in FIG. That is, the lever device 60 is generally configured to include a lever container 61, a rotation support pin 62, an operation lever 63, and a connecting cable 64.
As shown by the dotted line in FIG. 1, the lever container 61 is fixedly installed above the rear part of the seat back 12, and accommodates the operation lever 63 via the rotation support pin 62 in a rotatable manner. The operation lever 63 is rotatably supported by a rotation support pin 62 supported by the lever housing 61. As will be described in detail later, the operation lever 63 is lifted upward from the initial position before the solid line rotation operation. It can be rotated. When the operation of rotating the operation lever 63 in this way is performed, the connection cable 64 is pulled toward the operation lever 63 side (the right side in the figure), and the lever connecting portion 42 of the pole 40 described above is also operated by the operation lever 63. By being pulled toward the side (the right side in the figure), the pole 40 can be rotated clockwise against the biasing force of the biasing spring 50.

Next, the operation of the locking device 20 for the vehicle seat 10 configured as described above will be described.
FIG. 6 is an operation side view showing the operation of the locking device 20 of the vehicle seat 10 and shows in detail the force acting on the locking device 20. That is, the lock device 20 shown in FIG. 6 (A) is engaged with the striker 19. The lock device 20 shown in FIG. 6B is in a state where the engagement with the striker 19 is about to be released by the turning operation of the operation lever 63. The locking device 20 shown in FIG. 6C is in a state where the engagement with the striker 19 is released.
As shown in FIG. 6 (A), when the locking device 20 is engaged with the striker 19 and locks the seat back 12, the vehicle seat is caused by the luggage hitting the rear portion of the vehicle seat 10, or the like. Even when 10 receives a sudden impact from the rear, the inertial forces F1 and F2 generated by the received sudden impact are applied to the operation lever 63 from the center of rotation of the pole 40 (the position where the support pin 49 is disposed). Inertial force F1 from the rotation center of the pole 40 (the position where the support pin 49 is disposed) to the end of the bulky portion 45 opposite to the side to which the operation lever 63 is connected, as compared to the inertia force F2 up to Is larger due to the difference in inertial mass. That is, the inertial force F1 that is intended to rotate in the direction that maintains the engagement with the striker 19 is greater than the inertial force F2 that is intended to be rotated in a direction that releases the engagement with the striker 19. growing.
As a result, even if the vehicle seat 10 receives a sudden impact from the rear, such as when a load collides with the rear portion of the vehicle seat 10 as described above, the operation lever 63 does not cause the sudden impact. The inertial forces F1 and F2 generated by the above operation cause the operation lever 63 to rotate in the direction opposite to the rotation operation direction. That is, as before, the operation lever 63 rotates freely, the engagement state of the lock device 20 with the striker 19 is released, and the component part is unlocked without permission from the occupant. This can be prevented.
The operation lever 63 is urged by the urging force of the urging spring 50 described above so as to be positioned at the initial position before the rotation operation. Therefore, from the rotation center of the pole 40 (position where the support pin 49 is disposed). The inertial mass up to the end of the bulky portion 45 is set to be slightly larger than the inertial mass from the rotation center of the pole 40 to the operation lever 63 (including the connecting cable 64). That's fine. That is, if the inertial force F1 is slightly larger than the inertial force F2, the above-described action can be achieved together with the urging force of the urging spring 50.
Further, when the occupant intentionally rotates the operation lever 63, the operation is as shown in FIGS. 6B and 6C. That is, when the occupant intends to rotate the operation lever 63, unlike the sudden impact described above, the operation lever 63 is slowly rotated as shown in FIG. 6B. Therefore, the occupant can rotate the operation lever 63 without generating the inertia force F1 as described above on the pole 40.
In other words, the occupant can operate the locking device 20 so as to release the engagement with the striker 19 only by a turning operation without requiring a complicated operation as before, as shown in FIG. As shown, the seat back 12 can be unlocked.
Thus, according to the locking device 20 of the vehicle seat 10, the operability when the occupant releases the lock can be improved while the lock can be prevented from being released without permission. it can.

Further, according to the locking device 20 of the vehicle seat 10, the end of the bulky portion 45 on the side opposite to the side to which the operation lever 63 is connected with respect to the rotation center of the pole 40 (position where the support pin 49 is disposed). It is supposed to form up to a part. Thereby, the inertial mass from the rotation center of the pole 40 (position where the support pin 49 is disposed) to the end of the bulky portion 45 on the side opposite to the side to which the operation lever 63 is connected is It is set to be larger than the inertial mass from the (position where the support pin 49 is disposed) to the operation lever 63. For this reason, as compared with the previous configuration, only the shape of the pole 40 on the side opposite to the side to which the operation lever 63 is connected is changed, and the rotation operation direction of the operation lever 63 is as described above. The inertial force F1 of the pole 40 to be rotated in the opposite direction can be made larger than the inertial force F2 of the operation lever 63 or the like that causes the operation lever 63 to rotate in the rotation operation direction.
Therefore, according to the locking device 20 for the vehicle seat 10, it is possible to easily and effectively achieve the improvement in operability while preventing the lock from being arbitrarily released as described above. become.

[Second Embodiment]
Next, a second embodiment that is different from the first embodiment will be described. FIG. 7 is a side view showing a locking device 20A for the vehicle seat 10 in a locked state when viewed from the side, according to another embodiment. The locking device 20A in the second embodiment has a configuration in which only the pole 40A is different from the locking device 20 in the first embodiment described above, and the other configurations are the same. Composed. For this reason, in the following, only the pole 40A will be described, and portions that are configured in the same manner as in the first embodiment described above will be given the same reference numerals and description thereof will be omitted.
A pole 40A of the locking device 20A shown in FIG. 7 is an example in which the bulky portion 45 provided in the pole 40 of the locking device 20 of the first embodiment is not provided.
That is, in the second embodiment, although the above-described bulky portion 45 is not provided, the side to which the operation lever 63 is connected from the rotation center (position where the support pin 49 is disposed) of the pole 40A. The inertial mass from the opposite side of the pole 40A to the end of the pole 40A is compared with the inertial mass from the pivot center (position where the support pin 49 is disposed) of the pole 40A to the operation lever 63 (including the connecting cable 64). Is set to be large.
Specifically, the pole 40A of the locking device 20A according to the second embodiment has a rotational center (support pin 49 arrangement) as compared with the pole 40 of the locking device 20 according to the first embodiment described above. The installation position) is shifted upward in the pole 40 so as to satisfy the setting condition regarding the inertial mass described above. Specifically, in this pole 40A, a rotation support hole 41 is provided at the central portion of the pole 40A so that the rotation center thereof is located at the central portion of the pole 40A. Is inserted into the rotation support hole 41 so as to be disposed. At this time, the convex end portion 44A of the fitting portion 44 described above serves as an end portion of the pole 40A opposite to the side to which the operation lever 63 is connected from the rotation center (position where the support pin 49 is disposed) of the pole 40A. Is set.
Even when the pole 40A is configured in this way, the rotation center (position where the support pin 49 is disposed) of the pole 40A to the end 44A of the pole 40A opposite to the side to which the operation lever 63 is connected. The inertial mass is larger than the inertial mass from the center of rotation of the pole 40A (position where the support pin 49 is disposed) to the operation lever 63 (including the connecting cable 64), and therefore inertia caused by sudden impact. The forces F3 and F4 are operated from the center of rotation of the pole 40 (position of the support pin 49) as compared to the inertial force F4 from the center of rotation of the pole 40 (position of the support pin 49) to the operation lever 63. The inertial force F3 up to the end 44A of the pole 40 on the side opposite to the side to which the lever 63 is connected is greater. That is, the same operation as that of the first embodiment described above can be achieved.

The vehicle seat locking device according to the present invention is not limited to the above-described embodiment, and can be changed as appropriate without departing from the scope of the present invention.
That is, in the locking device 20 for the vehicle seat 10 in the above-described embodiment, the one in which the locking device 20 is provided for the seat back 12 has been described. However, the vehicle seat locking device according to the present invention is not limited to this, and the locking device only needs to be provided for a component constituting the vehicle seat. A locking device may be provided.
In the striker 19 of the locking device 20 for the vehicle seat 10 in the above-described embodiment, the striker 19 is provided on a vehicle body frame that constitutes the vehicle. However, the striker of the locking device for a vehicle seat according to the present invention is not limited to this, and may be any device as long as it is disposed in the vehicle. It may be arranged on the frame.
Further, the striker 19 of the locking device 20 for the vehicle seat 10 in the above-described embodiment has been described as being fixedly provided in the vehicle. However, the striker of the vehicle seat locking device according to the present invention is not limited to this, and may be arranged to be slidable in the vehicle, for example. When the striker is configured to be movable in this manner, an appropriate function such as a reclining function can be added to the above-described vehicle seat.
Further, in the hook 30 of the locking device 20 for the vehicle seat 10 in the above-described embodiment, the striker 19 is engaged in cooperation with the base member 25. However, the hook of the locking device for a vehicle seat according to the present invention is not limited to this, and may be configured to engage the striker with a single hook.
Further, in the base member 25 of the locking device 20 for the vehicle seat 10 in the above-described embodiment, the base member 25 is installed on the seat back frame (reference numeral M in FIG. 5) constituting the seat back 12. However, the base member of the vehicle seat locking device according to the present invention is not limited to this, and the seat back frame itself can function as the base member.

DESCRIPTION OF SYMBOLS 10 Vehicle seat 11 Seat cushion 12 Seat back 13 Headrest 15 Connecting device 19 Striker 20, 20A Lock device 25 Base member 25a, 25b Base plate 26 Mounting hole 27 Striker holding recess 27a Striker holding portion 27b Striker guide portion 28a, 28a Mounting bolt 28b, 28b Mounting nut 29a, 29b Rotation support hole 30 Hook 31 Rotation support hole 32 Striker fitting receiving portion 33 Pole fitting receiving portion 34 Spring locking portion 39, 49 Support pin 40, 40A Pole 41 Rotation supporting hole 42 Lever Connecting part 43 Spring locking part 44 Fitting part 44A Convex end part 45 Bulky part 60 Lever device 61 Lever holder 62 Rotating support pin 63 Operation lever 64 Connecting cable M Seat back frame

Claims (1)

In order to lock a structural part such as a seat back constituting the vehicle seat at a fixed position in the vehicle, a vehicle seat installed in the structural part to engage with a striker disposed in the vehicle. A locking device,
A base member fixedly installed on the component, and a hook for engaging the striker;
The base member has a hook holding state in which the hook is held at a position where the striker is engaged, and a hook free state in which the hook is released so as to release the striker. A pole for switching the state of the hook is provided,
The turning operation of the pole for switching the state of the hook with respect to the striker from the hook holding state to the hook free state is performed by a turning operation of an operation lever coupled to the pole,
The inertial mass from the center of rotation of the pole to the end of the pole opposite to the side to which the operation lever is connected is larger than the inertial mass from the center of rotation of the pole to the operation lever. It is set to be,
The inertial mass up to the end of the pole opposite to the side where the operation lever is connected to the rotation center of the pole is the side where the operation lever is connected to the rotation center of the pole. Is set to be larger than the inertial mass from the pivot center of the pole to the operation lever by forming the end of the pole on the opposite side to be bulky,
The vehicle seat is characterized in that it is set so that an inertial force to rotate in a direction to hold the engagement of the pole with the striker is larger when a load collides with the vehicle seat. Locking device.

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