JP2018202998A - Lock device of vehicle seat - Google Patents

Abstract

To provide a lock device which holds a seat cushion at the floor side more stably.SOLUTION: A latch part 50 which is engaged with a locked part 10a which is about to get out from a hook part 40 has: an upper jaw member 52 forming an upper jaw part 52b; a lower jaw member 54 forming a lower jaw part 54d; and a fixing part FP which fixes the upper jaw member 52 and the lower jaw member 54. The upper jaw member 52 is attached to a shaft part 42 in a posture perpendicular to a direction in which the shaft part 42 extends. The lower jaw member 54 is attached to the shaft part 42 in a position which is away from the hook part 40 further than the upper jaw part 52b in the direction in which the shaft part 42 extends.SELECTED DRAWING: Figure 11

Description

  The present invention relates to a vehicle seat lock device, and more particularly to a lock device used for holding a seat cushion of a vehicle seat on a floor side in a vehicle compartment.

  In this type of vehicle seat, from the viewpoint of effectively using the space in the vehicle interior, the seat cushion serving as a seating surface may be in a tip-up posture in which the seat cushion is flipped upward from the rear side as a base point. Thus, by setting the seat cushion to the tip-up posture, a member such as a wheelchair can be disposed in the vacant floor space. When the seat cushion is tilted downward and returned to its original posture, the locked portion provided on the back side of the seat cushion is held by a lock device fixed to the floor side.

  For example, the inertia lock device disclosed in Patent Document 1 can hold a pipe-like locked portion extending in the left-right direction on the back surface of the seat cushion. This inertia lock device has a cradle fixed to the floor side, a receiving port that receives the locked portion, and a latch that is locked to the locked portion that is about to come out from the receiving port. The receptacle is a plate member having a U-shaped cross section that is fixed in the left-right direction and is fixed on the cradle. An opening into which the locked portion can be inserted is provided on the front side. The latch is a flat plate that is fixed to the cradle and is rotatably attached around the axis of the shaft portion extending in the left-right direction. The front edge of the latch is curved so as to form a C shape in a side view, and the upper end and the lower end protrude relatively forward. Therefore, the latch is attached so as to be rotatable around the axis of the shaft portion in a state where the latch is tilted rearward, and is arranged to protrude slightly upward from the receiving port at the lower end of the front edge of the latch. Then, as the seat cushion is tilted downward and returned to the original posture, the locked portion gradually enters the receiving port. At this time, the locked portion pushes down the lower end of the latch front end protruding into the receiving port, whereby the latch rotates and the upper end of the latch front end is arranged above the locked portion. In this way, the upper end of the front end of the latch is arranged at a position that can be locked on the upper side of the locked portion that is about to come out from the receiving port. By doing so, even if the locked portion is about to come out of the receiving port, it is locked to the latch portion, and the seat cushion can be stably held in the original posture.

JP 2002-201843 A

  By the way, in the publicly known technique, an upper end corresponding to the upper jaw part of the present invention and a lower end corresponding to the lower jaw part of the present invention are provided in a latch constituted by a single flat plate material. When the locked portion is locked by the latch, the latch is disposed at the same position in the left-right direction with the upper and lower ends of the latch aligned vertically (coaxially). For this reason, the locked portion in the holding state comes into contact with the latch only at one place in the left-right direction, and there is a risk of rattling due to rocking or the like based on the latching position with the latch. The present invention has been devised in view of the above points, and an object of the present invention is to provide a lock device that more stably holds a seat cushion on the floor side.

  As means for solving the above problems, the vehicle seat locking device according to the first aspect of the present invention is used to hold the seat cushion of the vehicle seat on the floor side in the vehicle compartment, and the locked portion of the seat cushion is provided. A hook portion that receives the latch portion, a latch portion that is latched by the locked portion that is about to come out of the hook portion, and a shaft portion that is attached to the latch portion and is adjacent to the hook portion. The hook portion is a plate-like member having a U-shaped cross section that extends in a predetermined direction when viewed from above. The latch portion is rotatable around the axis of the shaft portion extending in the same direction as the hook portion, and is also pushed downward from the locked portion that enters the hook portion and rotates downward, and below the lower jaw portion. And an upper jaw part that rotates and moves to a position that can be locked on the upper side of the locked part. In this type of configuration, it is desired to hold the seat cushion on the floor side more stably by the lock device.

  Therefore, the latch portion of the present invention includes an upper jaw member that forms an upper jaw portion, a lower jaw member that forms a lower jaw portion, and a fixing portion that fixes the upper jaw member and the lower jaw member. The upper jaw member is attached to the shaft portion in a posture orthogonal to the direction in which the shaft portion extends, and the lower jaw member is disposed at a position farther from the hook portion than the upper jaw portion in the direction in which the shaft portion extends. Installed on. In the latch part of this invention, the upper jaw part and the lower jaw part are comprised by another member, and are being fixed by the fixing | fixed part. The upper jaw member forming the upper jaw portion is disposed relatively close to the hook portion and orthogonal to the shaft portion, so that the upper jaw portion is stably placed above the locked portion that is about to come out of the hook portion. Can be locked. Further, the lower jaw member forming the lower jaw is disposed at a position different from the upper jaw in the extending direction of the shaft portion, so that each jaw can be brought into contact with a different position of the locked portion. Can be prevented or reduced.

  According to the first aspect of the present invention, it is possible to provide a lock device that more stably holds the seat cushion on the floor side.

It is a perspective view of a vehicle seat. It is the schematic in the vehicle interior which showed the vehicle seat from the side. It is the perspective view which looked at the locking device from the front side. It is the perspective view which looked at the locking device from the back side. It is a top view of a locking device. It is sectional drawing of a part of locking device. It is a side view of an upper jaw member. It is a side view of a lower jaw member. It is a schematic side view of the locking device before receiving a to-be-locked part. It is a schematic side view of the locking device in a state where a locked part is received. It is a schematic side view of the locking device when the locked part is about to come out.

  Hereinafter, embodiments for carrying out the present invention will be described with reference to FIGS. In each drawing, for the sake of convenience, arrow lines indicating the front-rear direction, the left-right direction, and the up-down direction of the vehicle seat may be appropriately illustrated. In the vehicle seat of FIG. 2, for convenience, a cover or the like is removed from the vehicle seat shown in FIG. 1 to expose a part of the internal configuration of the seat.

  The vehicle seat 2 of FIG. 1 is a wide seat disposed on the floor F in the vehicle compartment, and has a first seat portion 2A and a second seat portion 2B. The first seat portion 2A is a wide portion constituting the left side of the seat, and includes a left seat cushion 4a, a left seat back 6a, and a pair of left headrests 8a. The second seat portion 2B is a narrow portion constituting the right side of the seat, and includes a right seat cushion 4b, a right seat back 6b, and a right headrest 8b. The headrests 8a and 8b are disposed on the corresponding seat backs 6a and 6b in the standing state.

[Seat cushion]
Each of the seat cushions 4a and 4b is a member that forms a seating surface, and the rear side thereof is connected to the lower side of the corresponding seat back 6a and 6b. For example, in the first seat portion 2A, with reference to FIG. 2, the lower portion of the seat back 6a is fixed to the upper portion of the bracket 12 that stands up from the floor F. The seat cushion 4a is connected to a bracket 12 supporting the lower portion of the seat back 6a via a substantially L-shaped link member 14 in a side view. The front portion of the link member 14 is fixed to the rear portion of the seat cushion 4a. The rear portion of the link member 14 is rotatably attached to a rotating shaft 16 that protrudes leftward from the upper portion of the bracket 12. Also in the second seat part 2B shown in FIG. 1, the lower side of the seat cushion 4b is connected to the rear part side of the seat back 6b by the same configuration as the first seat part 2A.

  The seat cushions 4a and 4b can be rotationally displaced from the seatable posture shown in FIG. 1 to the tip-up posture shown in FIG. 2 with the rotation shaft 16 of the bracket 12 arranged on the rear side as the rotation center. For example, the seat cushion 4a in the tip-up posture shown in FIG. 2 is in a state of being flipped upward and rearward with the rotation shaft 16 as the rotation center, and is disposed facing the seat back 6a. By setting the seat cushion 4a to the tip-up posture in this manner, it is possible to arrange other members such as the wheelchair WC in the vacant floor F space in front of the seat back. In order to return the seat cushion 4a to the original seatable posture, the seat cushion 4a is tilted forward about the rotation shaft 16 (see the seat cushion indicated by the broken line in FIG. 2). Then, the seat cushion 4a is brought into a state of being substantially horizontally tilted in the front-rear direction, and is held by the lock device 20 (details will be described later) on the floor F side. A locked portion 10a (described later in detail) is provided on the back side of the seat cushion 4a, and the locked portion 10a is held by the lock device 20 so that the seat cushion 4a is maintained in a seatable posture.

[Locked part]
Here, referring to FIG. 1, the locked portion 10a is a pipe-like member (typically made of metal) extending in the left-right direction, and is disposed on the back side of the seat cushion 4a. The front of the locked portion 10a is covered with a plate-shaped cover material 11a, and is disposed on the seat cushion 4a in a relatively inconspicuous state. Further, the left end and the right end of the locked portion 10a are bent toward the seat cushion 4a, and are attached to the mounting portion 10c of the seat cushion 4a shown in FIG. For this reason, the locked portion 10a can be displaced from a state where it is raised with respect to the back surface of the seat cushion 4a to a state where it is tilted toward the back surface of the seat cushion 4a. Referring to FIGS. 10 and 11, a locking projection 10b having a substantially rectangular shape in a sectional view is fixed to the upper portion of the locked portion 10a. The locking projection 10b is elongated in the left-right direction, and is a portion that can be locked to an upper jaw 52b of the locking device 20 described later. Also in the second seat portion 2B shown in FIG. 1, a locked portion 10a is provided on the back side of the right seat cushion 4b. The locked portion 10a of the right seat cushion 4b has substantially the same basic configuration except that it is slightly shorter than the above-described locked portion 10a, and is held by a corresponding locking device (not shown). .

  In the above-described seat configuration, it is desired that the locked portions 10a of the seat cushions 4a and 4b be held on the floor F side more stably without being rattled as much as possible. Therefore, in this embodiment, the seat cushions 4a and 4b are more stably held on the floor F side by the lock device 20 described later. Since the configuration (the locked portion and the locking device) for holding the seat cushions 4a and 4b on the floor F side is substantially the same, the details of the locking device 20 will be described below by taking the seat cushion 4a as an example. I decided to.

[Locking device]
With reference to FIG. 2, the lock device 20 is a device used for locking the seat cushion 4 a to the floor F side, and is fixed at an appropriate position on the floor F. 3 to 5, the locking device 20 includes a base portion 22, a hook portion 40, a shaft portion 42, a latch portion 50, and a biasing portion 70. Here, the base portion 22 is a substantially rectangular plate material that is long in the left-right direction when viewed from above, and is fixed on the floor F with a bolt material (not shown). The base portion 22 has a center in the left-right direction that is one step higher, and has a right mounting portion 24, a central arrangement portion 28, and a left mounting portion 26. The right mounting portion 24 is a substantially rectangular portion as viewed from above, which forms the right side of the base portion 22, and a bolt material (not shown) is inserted into the through hole 24 </ b> H on the bottom surface and fixed to the floor F side. Further, the front edge 24a and the rear edge 24b of the right mounting part 24 are bent upward, and both end edges 24a, 24b are also provided with rectangular through holes (not shown), for example, on the floor F side. It can be locked to the claw portion of the fixing material (not shown). The left mounting portion 26 is a substantially rectangular portion on the left side of the base portion 22 and has a bottom surface provided with a through hole 26H, and a front end edge 26a and a rear end edge 26b bent upward. doing. At the left attachment portion 26, the rear end edge 26b is disposed relatively rearward, and a belt material BM for fixing the wheelchair WC shown in FIG. 2 is attached to the rear end edge 26b. .

  In addition, referring to FIG. 3 to FIG. 5, the disposition site 28 is a one-step higher portion of a substantially rectangular shape as viewed from above, which forms the center of the base portion 22, and is provided with each portion 40, 42, 50, 70 described later. Can do. The arrangement portion 28 has a front end edge 28a bent upward, a rear end edge 28b described later, and a fixing surface 28c disposed between the front end edge 28a and the rear end edge 28b. . The fixing surface 28c is a portion having a downwardly convex curved shape and capable of fixing a hook portion 40 to be described later, and is gradually curved upward toward the front and rear. The rear end edge 28b of the arrangement portion 28 is a portion that protrudes substantially horizontally from the rear end of the fixing surface 28c toward the rear, and extends rearward from the right attachment portion 24. On the right side of the rear edge 28b, there are provided a first arrangement part 31 for attaching a shaft part 42 and the like to be described later, and a second arrangement part 32 for attaching one end part 70b of the urging part 70 to be described later. ing. As shown in FIG. 4, the first arrangement part 31 is a substantially inverted U-shaped plate-like part that protrudes rightward from the right edge of the rear end edge 28 b in a sectional view and has a rear end edge. After extending upward from 28b, the free end side is curved downward. The free end side of the first arrangement portion 31 extends below the rear end edge 28b, and is provided with an insertion hole 31H through which a shaft portion 42 described later can be inserted with reference to FIG. . Moreover, the 2nd arrangement | positioning site | part 32 is a rectangular plate-shaped site | part projected in the straight line toward the right side from the rear edge of the free end of the 1st arrangement | positioning site | part 31 with reference to FIG. . The right end portion 32a of the second arrangement portion 32 is relatively tightened in the vertical dimension, and can engage one end portion 70b of a biasing portion 70 described later.

[Hook part]
The hook portion 40 is a member that can receive the locked portion 10a shown in FIG. 1, and is fixed to the fixing surface 28c of the arrangement site 28 by welding or the like with reference to FIGS. The hook portion 40 is a plate-like member having a substantially U-shaped cross section following the outer shape of the locked portion 10a, and a space between the lower edge portion 40a and the upper edge portion 40b opens forward. The hook portion 40 has a substantially rectangular shape when viewed from the upper side in the left-right direction (the predetermined direction of the present invention), and is disposed along the extending direction of the locked portion 10a to be received. In addition, the lower edge portion 40a and the upper edge portion 40b of the hook portion 40 are each curled flange-shaped and curved toward the rear, and are arranged at an appropriate interval vertically so that the hook portion 40 There is an opening. The lower edge portion 40a and the upper edge portion 40b can be bent and deformed in directions away from each other as shown in FIG. 10 when the locked portion 10a is received.

[Shaft]
The shaft portion 42 is a member for attaching a latch portion 50 to be described later with reference to FIGS. 5 and 6, and is arranged on the right side and the rear side of the hook portion 40 in a state of being attached to the first arrangement portion 31. Has been. The shaft portion 42 is a bar extending in the left-right direction that is the same as the longitudinal direction of the hook portion 40 in a state adjacent to the right side of the hook portion 40, and includes a columnar first shaft member 42a and a square shape. It is formed by joining the columnar second shaft member 42b in these axial directions (axis A1 direction shown in FIG. 6). When attaching the shaft portion 42 to the first arrangement site 31, referring to FIG. 6, the first shaft material 42 a arranged on the right side of the first arrangement site 31 and the left side of the first arrangement site 31. The second shaft member 42b to be arranged is joined through the insertion hole 31H of the first arrangement portion 31. At this time, a disk-shaped positioning part 42c that projects radially outward at the left end of the first shaft member 42a is brought into contact with the first arrangement part 31. Further, the shaft portion 42 can be fixed to the first arrangement portion 31 by fixing the upper surface of the second shaft member 42 b to the rear surface of the arrangement portion 28 by welding or the like. In the fixed shaft portion 42, a first shaft member 42a projects substantially horizontally to the right from the first arrangement portion 31, and a latch portion 50 and an urging portion 70 described later are formed on the first shaft member 42a. The body part 70a can be attached.

[Latch part]
9 to 11, the latch portion 50 is a member that is locked to the locked portion 10 a that is about to come out of the hook portion 40, and its axis is relative to the shaft portion 42 as shown in FIG. 6. It is rotatably mounted around A1. 6 to 8, the latch portion 50 fixes the upper jaw member 52 forming the upper jaw portion 52b, the lower jaw member 54 forming the lower jaw portion 54d, and the upper jaw member 52 and the lower jaw member 54. And a fixed portion FP. At the time of receiving the locked portion 10a described later, the lower jaw member 54 forming the lower jaw portion 54d is pushed from the locked portion 10a and rotates downward, and the upper jaw member 52 forming the upper jaw portion 52b is moved to the locked portion 10a. It will rotate to the position which can be latched on the upper side.

[Upper jaw member (upper jaw)]
Referring to FIG. 7, the upper jaw member 52 is a substantially inverted L-shaped plate material (typically made of metal) in a side view in which the upper side protrudes forward, and the shaft portion 42 is rotatably inserted in the lower side. ing. The upper jaw member 52 is provided at the lower end of the first base portion 52a extending substantially upward from the shaft portion 42, the upper jaw portion 52b protruding forward from the upper end of the first base portion 52a, and the front end of the upper jaw portion 52b. It has the latching claw part 52c which protrudes. The first base portion 52a is a substantially rectangular portion that extends vertically in a side view, and the upper side is gently bent forward. Further, the upper jaw portion 52b is a triangular portion extending front and rear in a side view, the upper and lower dimensions are gradually tightened toward the front, and the front end portion where the locking claw portion 52c is provided protrudes downward. .

  And the inner edge (60a-60d) of the upper jaw member 52 has a shape which can be stably latched to the upper side of the to-be-locked part 10a, as shown in FIG. That is, referring to FIG. 7 and FIG. 11, the front edge 60 a of the first base portion 52 a that forms the inner edge of the upper jaw member 52 is inclined upward with the base point X in the middle in the vertical direction as a boundary. Further, the lower edge 60b of the upper jaw portion 52b (the portion excluding the locking claw portion 52c) forming the inner edge of the upper jaw member 52 is gradually inclined upward from the upper end of the front edge 60a toward the front, and the lower edge 60b A locking projection 10b of the locked part 10a is disposed below. The rear edge 60c of the locking claw portion 52c that forms the inner edge of the upper jaw member 52 has a concave curved shape forward and gradually protrudes rearward as it goes downward. The lower end of the rear edge 60c of the locking claw portion 52c is a portion that is locked to the front side of the locking projection 10b of the locked portion 10a. The lower edge 60d of the locking claw portion 52c is rounded so as to gradually curve upward as it goes forward, and has a shape that does not interfere with the locked portion 10a entering the hook portion 40 as much as possible.

[Lower jaw member (lower jaw)]
Referring to FIG. 8, the lower jaw member 54 is a substantially L-shaped plate material (typically made of metal) in a side view in which the lower portion projects forward, and the shaft portion 42 is rotatably inserted in the lower portion. Yes. The lower jaw member 54 includes a second base portion (54a to 54c) extending substantially upward from the shaft portion 42, and a lower jaw portion 54d protruding forward from the lower portion of the second base portion (54a to 54c). Yes. The lower jaw portion 54d has a generally triangular shape in a side view, and the vertical dimension is tightened toward the front, and the front end side has a curved shape that is convex forward. The lower jaw portion 54d is covered with a resin covering member 53 having substantially the same shape, and the locked portion 10a comes into contact with the covering member 53.

  Further, the second base portions (54a to 54c) are substantially the same shape as the first base portion 52a of the upper jaw member 52 in a side view, and the upper side is gently bent forward. Referring to FIGS. 6 and 8, the second base includes a lower part 54a where the lower jaw part 54d is provided, an upper part 54b which can be in surface contact with the first base 52a, an upper part 54b and a lower part. And a bent portion 54c provided between the portions 54a. As shown in FIG. 6, the bent portion 54c is a portion bent in a crank shape from the lower end of the upper portion 54b to the right, and the bent portion 54c causes the lower portion 54a to become lower jaw as described later. It will be arranged to the right of the upper part 54b together with the part 54d. Further, referring to FIGS. 4 and 9, a hook piece 55 that protrudes to the right as viewed from above is fixed to the rear edge 60 c of the lower portion 54 a. The hook piece 55 is made of a plate material that is bent in an L shape when viewed from above. The hook piece 55 is disposed above the second arrangement portion 32 where the one end portion 70b of the biasing portion 70 is to be hooked when the latch portion 50 described below is attached. And the other end part 70c of the urging | biasing part 70 mentioned later can be hooked on the hook part 55a which protrudes to the right of the hook piece 55. FIG.

[Fixed part]
Referring to FIG. 6, the fixing portion FP is a portion where the upper jaw member 52 and the lower jaw member 54 are fixed. By the fixing portion FP, the upper jaw member 52 and the lower jaw member 54 are integrated and can rotate in association with the axis portion A1 of the shaft portion 42. The fixed portion FP can be formed by placing the lower jaw member 54 adjacent to the right side of the upper jaw member 52 and bringing the upper portion 54b of the second base portion into surface contact with the right surface of the first base portion 52a and welding them (the upper jaw when fixed). The posture of the member and lower jaw member will be described later). In a state where the upper jaw member 52 and the lower jaw member 54 are fixed, the lower portion 54a and the lower jaw portion 54d of the second base portion are separated from the first base portion 52a and the upper jaw portion 52b to the right by the bending portion 54c with a separation dimension W1. It will be spaced apart.

[Energizing part]
And the latch part 50 is attached to the shaft part 42 which protrudes rightward from the 1st arrangement | positioning site | part 31 shown in FIG. Further, the latch unit 50 is maintained in the retracted state shown in FIG. 9 by the urging unit 70, and the latch unit 50 in the retracted state is disposed on the right side and the rear position of the hook unit 40. Referring to FIG. 3, the urging portion 70 is a coil spring-like member, and includes a cylindrical body portion 70a, one end portion 70b which is one end portion of the spring, and the other end portion of the spring. It has a certain other end 70c. Therefore, one end portion 70b is disposed on the right side of the body portion 70a and the other end portion 70c is disposed on the left side while the shaft portion 42 protruding to the right of the latch portion 50 is fitted into the body portion 70a. Next, one end portion 70 b of the urging portion 70 is extended rearward and hooked on the right end portion 32 a of the second arrangement site 32. Further, the other end portion 70 c of the urging portion 70 is extended upward and rearward and is hooked on the hook portion 55 a of the hook piece 55 of the lower jaw member 54. As shown in FIG. 10, when the locked portion 10 a is received by the hook portion 40, the latch portion 50 rotates forward against the urging force of the urging portion 70 as will be described later.

[States of upper and lower jaw members attached to the shaft]
Further, the upper jaw member 52 attached to the shaft portion 42 is maintained in a posture orthogonal to the lateral direction in which the shaft portion 42 extends, on the right side of the hook portion 40 as shown in FIGS. 5 and 6. In other words, the upper jaw member 52 is maintained in a posture orthogonal to the axis A1 of the shaft portion 42 shown in FIG. The lower jaw member 54 is disposed on the right side of the upper jaw member 52 and is disposed at a position relatively separated from the hook portion 40. In this lower jaw member 54, referring to FIG. 9, a lower jaw portion 54 d covered with a covering member 53 is disposed so as to protrude forward and upward and to the inside of the hook portion 40 in a side view. In the latch portion 50 in this state, with reference to FIGS. 5 and 6, the upper jaw portion 52b and the lower jaw portion 54d are spaced apart in the left-right direction by the separation dimension W1 by the bent portion 54c of the lower jaw member 54. Thus, in the present embodiment, the upper jaw portion 52b and the lower jaw portion 54d are disposed at different positions in the left-right direction in which the shaft portion 42 extends.

[Retaining the seat cushion with the locking device]
With reference to FIG. 2, the seat cushion 4 a is returned to the seatable posture from the tip-up posture, and the locked portion 10 a on the back surface of the seat cushion 4 a is held by the lock device 20. In this posture displacement of the seat cushion 4a, as the seat cushion 4a is tilted forward, the locked portion 10a gradually rotates from the front to the rear as shown in FIG. 10, and enters the hook portion 40 of the locking device 20. (In FIG. 10, the locus of rotational movement of the locked portion 10a is indicated by a one-dot broken line SO). Then, the locked portion 10 a pushes down the lower jaw portion 54 d (covering member 53) of the lower jaw member 54 protruding into the hook portion 40. Accordingly, the latch portion 50 rotates forward from the retracted state against the urging force of the urging portion 70, and the upper jaw portion 52b of the upper jaw member 52 is disposed at a position where it can be locked to the upper side of the locked portion 10a. The In the present embodiment, since the lower jaw portion 54d is covered with the resin covering member 53, it is preferable to avoid occurrence of abnormal noise due to contact (for example, metal touch) between the locked portion 10a and the lower jaw member 54. Can do. By holding the locked portion 10a on the hook portion 40 of the locking device 20 in this way, the seat cushion 4a is held in an original seatable posture. In this type of configuration, it should be avoided as much as possible that the locked portion 10a in the holding state swings around the locking portion with the latch portion 50 as a base point.

  Therefore, in the latch unit 50 of the present embodiment, referring to FIGS. 6 and 9 to 11, the upper jaw member 52 forming the upper jaw portion 52b, the lower jaw member 54 forming the lower jaw portion 54d, and the upper jaw member 52. And a fixing portion FP that fixes the lower jaw member 54. The upper jaw member 52 is attached to the shaft portion 42 in a posture orthogonal to the direction in which the shaft portion 42 extends. The lower jaw member 54 forming the lower jaw portion 54d is attached to the shaft portion 42 at a position farther from the hook portion 40 than the upper jaw portion 52b in the direction in which the shaft portion 42 extends. In particular, in the present embodiment, as shown in FIG. 6, the lower part 54a and the lower jaw part 54d of the lower jaw member 54 are more appropriately spaced apart from the upper jaw part 52b to the right by the bent part 54c with a separation dimension W1. . As described above, the lower jaw portion 54d is arranged on the right side of the upper jaw portion 52b, so that the jaw portions 52b and 54d can be brought into contact with each other at different positions of the locked portion 10a (at two locations). Thus, rattling of the locked portion 10a can be prevented or reduced.

  Next, referring to FIG. 11, when the locked portion 10a is about to come out of the hook portion 40, the upper jaw portion 52b is locked to the locked portion 10a. At this time, in the present embodiment, the upper jaw member 52 is disposed close to the hook portion 40 and orthogonal to the shaft portion 42, so that the upper jaw is positioned above the locked portion 10 a that is about to come out of the hook portion 40. The part 52b will be locked stably. 7 and 11, the inner edges (60a to 60c) of the upper jaw member 52 have a shape that can be stably locked on the upper side of the locked portion 10a. That is, the locked portion 10a in the locked state is locked to the rear edge 60c of the locking claw portion 52c in a state where the locking convex portion 10b fixed on the upper portion is fitted below the upper jaw portion 52b. Yes. In the locking convex portion 10b in this state, the rear edge 60c of the locking claw portion 52c, the front edge 60a of the first base portion 52a, and the lower edge 60b of the upper jaw portion 52b are adjacent to the front, rear, and upper sides. ing. In this way, by locking the locking projection 10b with the rear edge 60c of the locking claw 52c while being fitted below the upper jaw 52b, the locked portion 10a is pulled out forward and upward. Can be suitably prevented.

  As described above, in the latch portion 50 of the present embodiment, the upper jaw portion 52b and the lower jaw portion 54d are formed of separate members and fixed by the fixing portion FP. The upper jaw member 52 that forms the upper jaw portion 52b is disposed relatively close to the hook portion 40 and orthogonal to the shaft portion 42, so that the upper portion of the locked portion 10a that is about to come out of the hook portion 40 is disposed. Thus, the upper jaw 52b can be stably locked. Further, the lower jaw member 54 forming the lower jaw portion 54d is arranged at a position different from the upper jaw portion 52b in the extending direction of the shaft portion 42, whereby each jaw portion can be brought into contact with a different position of the locked portion 10a. Thus, rattling of the locked portion 10a can be prevented or reduced. Therefore, according to the present embodiment, it is possible to provide the lock device 20 that holds the seat cushions 4a and 4b on the floor F side more stably.

  The vehicle seat locking device of the present embodiment is not limited to the above-described embodiment, and may take other various embodiments. In the present embodiment, the configuration (shape, dimension, arrangement position, number of arrangement, configuration of each part, etc.) of the lock device 20 is exemplified, but the configuration of the lock device is not limited. For example, the locking device can hold a pipe-shaped or plate-shaped locked portion, and can appropriately change the extending direction and configuration of the hook portion and the shaft portion according to the extending direction of the locked portion. In the present embodiment, an example in which the lower jaw member is provided with a bent portion and the upper jaw portion and the lower jaw portion are separated from each other has been described. Unlike this, the bent portion can be omitted from the lower jaw member. For example, the lower jaw member is constituted by a flat plate member like the upper jaw member, and the upper jaw member and the lower jaw member are fixed by a rod-like or plate-like fixing portion disposed therebetween. By doing so, the upper jaw portion and the lower jaw portion can be spaced apart by the amount of the fixed portion. If the upper jaw part and the lower jaw part can be separated, the upper jaw member and the lower jaw member can be overlapped in the thickness direction and fixed by a fixing part formed by welding. The shaft portion can be adjacent to at least one of the right and left sides of the hook portion.

  Further, in the present embodiment, the configuration of the vehicle seat 2 is exemplified, but the configuration of the vehicle seat can be changed as appropriate, and the configuration of the present embodiment can be applied to, for example, a single vehicle seat. And the structure of this embodiment is applicable to vehicle seats, such as a vehicle, an aircraft, and a train.

2 Vehicle Seat 2A First Seat Part 2B Second Seat Part 4a, 4b Seat Cushion 6a, 6b Seat Back 8a, 8b Headrest 10a Locked Part 10b Locking Convex Part 10c Attachment Part 11a Cover Material 12 Bracket 14 Link Member 16 Rotation Shaft 20 Locking device 22 Base parts 24, 26 Attachment site 28 Arrangement site 28a Front end edge 28b Arrangement site rear edge 28c Arrangement site fixing surface 31 First installation site 31H Insertion hole 32 Two arrangement parts 32a Right end part 40 of second arrangement part Hook part 40a Lower edge part 40b of hook part Upper edge part 42 of hook part Axis part 42a First shaft member 42b Second shaft member 42c Positioning part 50 Latch part 52 Upper jaw member 52a First base portion 52b Upper jaw portion 52c Locking claw portion 54 Lower jaw member 54a Lower portion 54b Upper portion 54c Bending portion 54 d Lower jaw portion 53 Cover member 55 Hook piece 55a Hook portion 60a Front edge 60b of first base portion Lower edge 60c of upper jaw portion Rear edge 60d of engagement claw portion Lower edge 70 of engagement claw portion Energizing portion 70a Body portion 70b One end Portion 70c other end A1 axis BM of shaft portion belt material F floor FP fixing portion WC wheelchair WS washer

Claims (1)

It is used to hold the seat cushion of the vehicle seat on the floor side in the vehicle compartment, and is latched by the hook portion that receives the locked portion of the seat cushion, and the locked portion that is about to come out of the hook portion. A latch portion, and a shaft portion to which the latch portion is attached and adjacent to the hook portion,
The hook part is a plate-like member having a U-shaped cross section extending in a predetermined direction when viewed from above, and the latch part is rotatable around the axis of the shaft part extending in the same direction as the hook part. And a lower jaw part that is pushed from the locked part that enters the hook part and rotates downward, and a position that can be locked to the upper side of the locked part as the lower jaw part rotates downward. In a vehicle seat locking device having a rotating upper jaw part,
The latch portion includes an upper jaw member that forms the upper jaw portion, a lower jaw member that forms the lower jaw portion, and a fixing portion that fixes the upper jaw member and the lower jaw member,
The upper jaw member is attached to the shaft portion in a posture orthogonal to the direction in which the shaft portion extends, and the lower jaw member is located closer to the hook portion than the upper jaw portion in the direction in which the shaft portion extends. A vehicle seat locking device attached to the shaft portion at a distant position.

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