JP5101932B2 - Vehicle seat lock device - Google Patents

Description

  The present invention relates to a vehicle seat lock device configured to lock a seat back disposed on a seat cushion to an upright position where an occupant can be seated.

  For example, in a rear seat of an automobile, a retractable seat back disposed by a seat cushion can be locked to a vehicle body member, and the seat back is locked when a collision load in the vehicle front-rear direction acts on the seat back. In some cases, a seat lock device is provided so as not to disengage.

As such a seat lock device, for example, in Patent Document 1, a striker attached to a vehicle body member, a lock plate attached to a seat back and having a hook portion detachably engaged with the striker, There has been proposed one provided with a protector that prevents the striker from moving away from the hook portion at the time of a collision.
JP-A-6-206486

  By the way, the conventional seat lock device has a structure that prevents the movement of the striker by providing a separate protector, and there is a problem that the number of parts increases by the amount of the protector and the lock structure tends to be complicated. is there.

  Here, in order to prevent the striker from coming off from the hook part without using a separate protector, it is possible to lengthen the engagement groove of the hook part with the striker or to increase the biasing force of the hook part in the locking direction. It is possible to do. However, if it does in this way, the operating angle and operating force of a hook part at the time of releasing a lock | rock will become large, and the problem that operation feeling will deteriorate will arise.

  The present invention has been made in view of the above-described conventional situation, and can prevent the seat back from being unlocked at the time of a collision without increasing the number of parts, complicating the lock structure, and deteriorating the operation feeling. An object of the present invention is to provide a seat lock device for use.

The present invention is a vehicle seat lock device that locks a seat back that is rotatably or detachably disposed on a seat cushion in a vehicle front-rear direction to an upright position where an occupant can sit,
A rod-shaped striker member attached to either the seat back or the vehicle body member, and an opening attached to the other and detachably engaged with the striker member to lock the seat back in an upright position. A hook member having a hook member, and when the collision load in the vehicle front-rear direction acts on the seat back and the striker member and the hook member move relative to each other in the vehicle front-rear direction at the opening of the hook member. Two recesses are formed to engage the member and prevent the striker member from moving in the unlocking direction, and the hook member is a plate-like member having a constant thickness in the longitudinal direction of the striker member. , each recess, the so formed as gouging the interior side edges and outside the side edges in the thickness direction and the axial direction as viewed in the striker member of the opening It is characterized by being disposed in substantially opposed positions in the diameter direction of the striker member.

  According to the seat lock device of the present invention, when a collision load in the vehicle front-rear direction is applied to the seat back at the opening of the hook member, the striker member is engaged to move the striker member in the unlocking direction. Since the dent to prevent is formed, it is possible to prevent the seat back from being unlocked. For example, when a load or the like mounted on the rear side of the seat back moves forward due to inertial force and collides with the seat back at the time of a vehicle collision, the striker member moves as the seat back moves forward, and the hook There is a possibility that it may come off from the opening of the member. On the other hand, in the present invention, the recess formed in the opening of the hook member bites into the striker member, thereby preventing the striker member from moving in the unlocking direction, and thus the seat back is prevented from falling. Can be prevented.

Moreover, since the said dent was formed by rolling the vehicle inner edge and the vehicle outer edge in the thickness direction of the opening, the dent can be formed at the same time when the hook member is manufactured, and a separate member is required, or an operation feeling is provided. The safety performance at the time of a collision can be improved with a simple structure and low cost.

  Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

  1 to 8 are views for explaining a vehicle seat lock device according to an embodiment of the present invention. FIG. 1 is an exploded perspective view of a seat lock device disposed on a rear seat, and FIG. 3 and 4 are perspective views of the hook member of the seat lock device, FIG. 5 is a side view of the hook member as viewed from the indoor side, and FIGS. 6 to 8 are sectional views of the hook member (VI in FIG. 5). -VI sectional view, VII-VII sectional view, VIII-VIII sectional view).

  In the figure, reference numeral 1 denotes an automobile, and a vehicle body 2 of the automobile 1 has a roof panel 6 disposed between upper ends of left and right side panels 5 and 5 on which a front door 3 and a rear door 4 are disposed. At the same time, a floor panel 7 is disposed between the lower ends to form a vehicle compartment 2a, and a back door 8 is disposed on the rear end surface of the vehicle body 2.

  A front seat 9 is disposed on the front side of the floor panel 7 and a rear seat 10 is disposed on the rear side. The floor panel 7 on the rear side of the rear seat 10 is a luggage compartment 7a, and the luggage compartment 7a can be opened and closed by the back door 8.

  The rear seat 10 includes a seat cushion 11 fixed to the floor panel 7, a front retractable position a that abuts against the upper surface of the seat cushion 11 via hinge members 13, 13 on the seat cushion 11, and a standing seat on which an occupant sits. And a seat back 12 supported so as to be rotatable in the front-rear direction with respect to the position b.

  A seat lock device 15 is disposed between the seat back 12 and the left and right side panels 5 and 5 facing the seat back 12.

  The seat lock device 15 includes rod-shaped left and right striker members 16 and 16 attached to upper end portions of the left and right wall surfaces 12a of the seat back 12, and rear pillar members of the left and right side panels 5 ( The left and right hook members 17 and 17 are attached to the vehicle body member 5a and detachably engage with the striker member 16 to lock the seat back 12 in the standing position b.

  The left and right striker members 16 are fixed to a seat frame (not shown) of the seat back 12, and are columnar striker portions 16a projecting outward in the vehicle width direction from the left and right wall surfaces 12a, and the striker portions 16a. And a flange portion 16b having a diameter larger than that of the striker portion 16a.

  The left and right hook members 17 include a resin hook body 20 and a sheet metal support member 21 that supports the hook body 20 so as to swing back and forth between a lock position A and an unlock position B. And a bolt 22 for fixing the support member 21 to the rear pillar member 5a, and a coil spring 23 interposed between the support member 21 and the hook body 20 and constantly biasing the hook body 20 to the lock position A. (See FIGS. 5 and 6).

  The hook body 20 includes a housing part 20a that covers the support member 21, a lock release lever 20b that extends upward following the housing part 20a, and a front side of the lock release lever 20b that follows the housing part 20a. And a hook portion 20c extending obliquely upward.

  The hook portion 20c has an opening portion 20d that opens rearward and obliquely upward, and the striker member 16 is detachably engaged with the opening portion 20d.

  The dimension t in the vehicle width direction of the hook portion 20c is set so as to have a certain length in the axial direction of the striker portion 16a, and is specifically set to the same value as the substantially diameter of the striker portion 16a. The opening width w of the opening 20d is set to be approximately the same value as the diameter d of the striker portion 16a (see FIG. 7).

  To unlock the seat back 12, the left and right unlock levers 20b are rotated forward to the unlock position B as shown in FIG. Then, this disengages the striker member 16 from the opening 20d.

  When an impact load in the vehicle front-rear direction is applied to the seat back 12 in the opening 20d of the left and right hook bodies 20, the striker member 16 is engaged with the opening 20d. Two recesses 20e and 20f are formed to prevent movement in the unlocking direction.

  Each of the recesses 20e and 20f is formed by scraping off a part of the vehicle inner edge and the vehicle outer edge of the opening 20d, and is integrally formed at the same time when the hook body 20 is resin-molded. Is.

  The inner recess 20e and the outer recess 20f are disposed so as to be substantially opposed to the striker portion 16a located at the lock position A in the diametrical direction, and have a substantially spherical shape along the outer peripheral surface of the striker portion 16a. ing.

  The curvature radii of the recesses 20e and 20f are set to about ½ of the diameter of the striker portion 16a.

  When an impact load is applied to the seat back 12 from the rear of the vehicle, the left and right striker members 16 move so as to rotate forward about the opening 20d, and at the same time, a force for pushing up the striker portion 16a is applied. The striker member 16 tends to move in the direction away from the opening 20d, that is, in the unlocking direction.

  In the present embodiment, at the initial stage of movement of the striker member 16, the recesses 20e and 20f of the opening 20d are engaged with the striker part 16a to prevent the striker part 16a from moving in the unlocking direction. At the same time, the collar portion 16b bites into the outer wall surface of the hook portion 20c, and the striker member 16 is fixed at three points of the outer wall surface of the hook portion 20c and the recesses 20e and 20f (FIG. 7, FIG. 8).

  Thus, according to the present embodiment, when a collision load in the vehicle front-rear direction is applied to the seat back 12 in the opening 20d of the left and right hook bodies 20, the striker member 16 is engaged with the striker member 16. Since the recesses 20e and 20f that prevent the movement of the seat in the unlocking direction are formed, the seat back 12 can be prevented from being detached from the hook member 17 at the time of a collision.

  That is, when a load or the like mounted in the rear luggage compartment 7a of the rear seat 10 moves forward due to an inertial force and collides with the seat back 12 at the time of a vehicle collision, the left side is moved as the seat back 12 moves forward. There is a concern that the right striker member 16 moves and comes out of the opening 20d of the hook member 17. On the other hand, in this embodiment, the two recesses 20e and 20f formed at the outer edge of the opening 20d can be engaged with the striker member 16 to fix the striker member 16.

  In the present embodiment, the recesses 20e and 20f are formed by scraping off a part of the inner side and the outer vehicle side edge of the opening 20d. Therefore, when the hook body 20 is resin-molded, the recesses 20e and 20f are simultaneously formed. It is possible to form, there is no need to provide a separate member, and the safety performance at the time of collision can be improved with a simple structure and low cost without deteriorating the operation feeling.

In addition , you may set the curvature radius of each said dent to a value larger than 1/2 of the diameter of a striker member.

  In the above embodiment, the striker member 16 is disposed on the seat back 12 and the hook member 17 is disposed on the rear pillar member 5a. However, in the present invention, the hook member is disposed on the seat back and the striker member is disposed on the rear pillar member. good.

  Further, in the above-described embodiment, the seat back 12 is rotatably supported by the seat cushion 11 via the hinge member 13, but the present invention is also applicable to a seat in which the seat back is detachable from the seat cushion. is there.

  Furthermore, although the seat cushion 11 is fixed to the floor panel 7, the present invention may be such that the seat cushion can be slid in the front-rear direction.

1 is an exploded perspective view of a seat lock device according to an embodiment of the present invention. It is a side view of the motor vehicle by which the said seat lock device was arrange | positioned. It is a perspective view of the hook member of the seat lock device. It is a perspective view of the hook member. It is the side view seen from the room inner side of the hook member. FIG. 6 is a sectional view of the hook member (a sectional view taken along line VI-VI in FIG. 5). It is sectional drawing (VII-VII sectional view taken on the line of FIG. 5) of the said hook member. It is sectional drawing (the VIII-VIII sectional view taken on the line of FIG. 5) of the said hook member.

Explanation of symbols

5a Rear pillar member (vehicle body member)
DESCRIPTION OF SYMBOLS 11 Seat cushion 12 Seat back 15 Seat lock device 16 Striker member 17 Hook member 20c Hook part 20d Opening part 20e, 20f Depression b Standing position

Claims (1)

A vehicle seat lock device that locks a seat back that is rotatably or detachably disposed on a seat cushion in a vehicle front-rear direction to an upright position where an occupant can sit,
A rod-shaped striker member attached to either the seat back or the vehicle body member, and an opening attached to the other and detachably engaged with the striker member to lock the seat back in an upright position. A hook member having
When the collision load in the vehicle front-rear direction acts on the seat back and the striker member and the hook member move relative to each other in the vehicle front-rear direction, the hook member opens and engages with the striker member. Two dents are formed to prevent movement of the member in the unlocking direction,
The hook member is composed of a plate-like member having a certain thickness in the longitudinal direction of the striker member,
Each of the recesses is formed so as to cover the vehicle inner edge and the vehicle outer edge in the thickness direction of the opening, and is substantially opposed to the striker member in the diametrical direction when viewed in the axial direction of the striker member. A vehicle seat lock device, wherein the vehicle seat lock device is arranged .

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