JP4213571B2 - Seat latch device - Google Patents

Description

  The present invention relates to a seat latch device that is optimal for a seat that can be displaced between a seatable state and a non-seatable state.

2. Description of the Related Art Conventionally, in a vehicle seat latch device, when a slide rail of a seat slide device that supports the seat so that the position of the seat can be adjusted in the front-rear direction is at a rear limit position with respect to the lower rail, for example, an unlocking member such as a strap. When the release operation is performed, the engagement state in which the seat is locked in the seatable state is released, and the seat can be displaced to the seating impossible state. In addition, when the slide rail is in a position other than the slide rear limit position, even if the unlocking member is released, the link provided on the slide rail comes into contact with the release restricting plate provided on the lower rail and the rotation is restricted. As a result, the unlocking operation of the unlocking member becomes impossible. As a result, when the slide rail is at a position other than the rear limit position of the slide, it is impossible to displace the seat into a non-seatable state so that it does not contact or interfere with on-vehicle equipment located in front of the seat. (For example, refer to Patent Document 1).
Japanese Patent No. 3445168

  However, in the conventional seat latch device as described above, when the unlocking member is unlocked, the unlocking operation of the seat latch device and the link operation are synchronized via the connecting wires. The unlocking operation force of the unlocking member becomes heavy, causing a decrease in operability, and in order to ensure the synchronization of each part, adjustment work for absorbing the dimensional variation between the parts is required. There is a problem that the attaching work is troublesome.

  In view of the conventional problems, an object of the present invention is to provide a seat latch device that can reduce the unlocking operation force of the unlocking member and improve the operability.

According to the present invention, the above problem is solved as follows.
(1) A slide rail that supports a seat that is displaceably supported between a seatable state and a non-seatable state on a vehicle body so as to be reciprocally movable with respect to the lower rail on the vehicle body side in the seatable state is predetermined. When the seat is in the predetermined position, the seat can be moved from the locked state in which the seat can be held in the seatable state to the seatable state based on the operation of the unlocking member provided at an appropriate place. In the seat latch device having engagement means operable to an unlocked state, when the slide rail is in a position other than the predetermined position, the unlocking state is changed from the locked state of the engagement means based on the operation of the unlocking member. And the slide rail is moved to the predetermined position so that the regulation is prevented. Position from the comprising a regulating member movable to permit position permitting actuation to the unlock state from the locked state of the meshing means based on the operation of the lock release member, the regulating member is near said engagement means And when it is in the restricting position, the movement of the meshing means to the unlocked state is prevented and permitted by entering the movement locus of the contact portion provided in the meshing means. when in position, by retracting the moving locus outside of the contact portion of the engagement means, it has a hook portion to allow movement of the unlocked state of the engagement means, the predetermined position the slide rails The restriction member is held in the permission position, and when the seat moves toward the non-sitting state, the restriction member can be moved to the restriction position by the biasing means, and the meshing means When moving from the unlocked state toward the locked state, a blocking portion capable of holding the restricting member in a permitted position while being in sliding contact with the protruding portion provided on the restricting member, the protruding portion being the blocking By separating from the portion, the meshing means moves to the locked state, and the restricting member moves to the restricting position .

(2) A slide rail that supports a seat that is displaceable between a seatable state and a non-seatable state in a vehicle body so as to be reciprocally movable with respect to the vehicle body side lower rail when the seat is in the seatable state is predetermined. When the seat is in the predetermined position, the seat can be moved from the locked state in which the seat can be held in the seatable state to the seatable state based on the operation of the unlocking member provided at an appropriate place. In the seat latch device having engagement means operable to an unlocked state, when the slide rail is in a position other than the predetermined position, the unlocking state is changed from the locked state of the engagement means based on the operation of the unlocking member. And the slide rail is moved to the predetermined position so that the regulation is prevented. A regulating member that is movable from a position to a permission position that enables the engagement means to operate from the locked state to the unlocked state based on the operation of the unlocking member, and the restriction member is in the vicinity of the engagement means And when in the restricting position, the engagement means is unlocked by entering the movement locus of the contact portion provided in the engagement means so as to be orthogonal to the contact portion. A hook portion that prevents movement of the meshing means to the unlocked state by preventing movement to the state and retreating from the movement locus of the contact portion of the meshing means when in the permitted position. And when the slide rail is in the predetermined position, the restricting member is held in the permitted position, and when the seat moves toward a non-seatable state, the restricting member is A blocking portion that is movable and is capable of holding the restriction member in a permitted position while being in sliding contact with a protrusion provided on the restriction member when the engagement means moves from the unlocked state toward the locked state. When the protrusion is separated from the blocking portion, the meshing means moves to the locked state, and the restriction member moves to the restriction position.

According to the present invention, the following effects can be obtained.
(1) According to the first aspect of the invention, the operation of the unlocking member for enabling the seat to be displaced to the non-seatable state is sufficient for operating the engagement means from the locked state to the unlocked state. In addition, the operation force can be reduced, the operability can be improved, and the adjustment work between the respective parts, which has been conventionally required, is not required, and the assembly work can be made more efficient. In addition, the restriction member can be pivotally supported in the vicinity of the meshing means, and the engagement means can be made into an unlocked state by a simple configuration in which a hook portion is provided on the restriction member. . Furthermore, after the seat is displaced to the non-seatable state, it is possible to reliably move the meshing means to the locked state and the restricting member to the restricting position.

(2) According to the invention described in claim 2 , in addition to the effect of the invention described in claim 1, it is possible to reliably prevent the operation of the meshing means to the unlocked state.

  (1) is a seat of the rear seat formed from a seat (2) and a backrest (3) pivotally supported at the rear of the seat (2). A seat slide device (4) for adjusting the front / rear position of the seat (1) is attached to the bottom.

  The seat slide device (4) has a front part rotatably connected to a recess (7) of a floor (6) via a connecting rod (5) and a seat attached to a lower part of the floor (6) at a rear part. The lower rail (4a) on the floor (6) side (vehicle body side) provided with a striker (9) that can be engaged and disengaged with respect to the latch device (8) and the lower rail of the seat (2) are fixed. (4a) and a slide rail (4b) fitted so as to be slidable in the front-rear direction (reciprocally movable). The slide rail (4b) has a plurality of slide rails (4b) with respect to the lower rail (4a) by selectively engaging with a plurality of engagement holes (not shown) provided in the lower rail (4a). Locking means (not shown) whose position can be adjusted in stages is provided. This locking means is also unlocked by a release operation of an operation handle (not shown), and enables the slide rail (4b) to move back and forth.

  The seat (1) is in a seatable state (A) shown in FIG. 1 in which the backrest (3) stands up and the occupant can sit, and the backrest (3) is in a forward leaning position and the floor (6) It is housed in the recess (7) and can be displaced to the non-sitting state (B) shown in FIG. 1 where the occupant cannot substantially sit.

  A rotating link (11) is pivotally supported at the rear end of the lower rail (4a) by a pivot (10) that faces in the left-right direction (a direction perpendicular to the moving direction of the slide rail (4b)).

  A push portion (12) capable of contacting the rotation link (11) is provided at a position near the rear portion of the slide rail (4b). When the slide rail (4b) moves to a predetermined position (in this embodiment, the slide rear limit position), the pressing portion (12) contacts the upper end portion of the rotation link (11) from the front. By contact, the pivot link (11) is pivoted mainly from the standby position shown in FIGS. 2 and 4 in the clockwise direction in FIGS. 1 to 8 and mainly to the operation position shown in FIGS. be able to.

  The rotation link (11) rotates from the standby position to the operation position, so that the lower end abuts on the upper part of a later-described restriction lever (23) as shown mainly in FIGS. (23) is rotated from the restricted position to the permitted position.

  The seat latch device (8) has a base plate (14) fixed to the lower part of the floor (6) by a plurality of bolts (13). As shown mainly in FIG. Hook provided at the tip and pivotally supported by the pivot (15) facing the direction, latch (16) detachable from the striker (9), and pivot (17) facing the left-right direction A locking plate (18) that can be engaged with and disengaged from the latch (16), and a portion (18a) that is pivotally supported on the same axis (17) as the locking plate (18) and is provided in front of the seat latch device (8). The cam lever (21) connected to the operation handle (19) forming the lock release member via the cable (20), and the substantially lever-shaped control member pivotally supported by the pivot shaft (22) facing in the left-right direction. A regulating lever (23) is provided. (14a) is a cover plate that is fixed to the base plate (14) and supports the pivots (15) and (17).

  The latch (16) is constantly urged in the unlatching direction (counterclockwise in FIGS. 4 to 8) by a spring (24) wound around the pivot (15). The locking plate (18) is constantly urged in the locking direction (counterclockwise in FIGS. 4 to 8) by a spring (25) that constitutes urging means supported by the base plate (14). The regulating lever (23) is always urged in the regulating direction (clockwise in FIGS. 4 to 8) by a spring (26) that constitutes an urging means wound around the pivot (22).

  When the seat (1) is in the seatable state (A), the latch (16) is held in the latch position mainly shown in FIGS. 4, 5 and 6 engaged with the striker (9). ) In the non-sitting state (B), the striker (9) rotates to the unlatched position shown in FIGS.

  The cam lever (21) is rotated from the lock position shown in FIGS. 4 and 5 mainly to the unlock position shown in FIGS. 6 and 7 via the cable (20) based on the release operation of the operation handle (19). Then, when the operating force of the operating handle (19) is removed, as will be described later, it returns and rotates from the unlocked position to the locked position.

  As the cam lever (21) rotates, the locking plate (18) engages the latch portion (16a) with the hook portion (18a) to restrain the latch (16) at the latch position. , And the hook portion (18a) is released from the latch (16), and can be rotated to the unlock position shown mainly in FIGS.

  The locking plate (18) and the cam lever (21) are linked to each other as follows. When the cam lever (21) moves from the lock position to the unlock position, the locking plate (18) is integrated with the cam lever (21) and rotates from the lock position to the unlock position. When the locking plate (18) is moved from the unlocked position to the locked position by the urging force of the spring (25), the cam lever (21) rotates together with the locking plate (18) from the unlocked position to the locked position. To do. When the latch (16) engages with the striker (9) and rotates from the unlatched position to the latched position, the locking plate (18) temporarily moves from the locked position to the unlocked position, but the cam lever (21) It does not move while stopped in the locked position.

  When the slide rail (4b) is in a position other than the predetermined position (a position forward of the slide rear limit position), the regulating lever (23) is mainly shown in FIG. 4 and when the slide rail (4b) is in a predetermined position, the pivot link (11) is pivoted to the operating position to be held at the permitted position. ing.

  When the restricting lever (23) is in the restricting position, the locking plate (18) and the cam lever (21) are prevented from rotating from the locked position to the unlocked position as described later, and are also in the permitted position. The locking plate (18) and the cam lever (21) can be rotated from the locked position to the unlocked position as described later.

  The regulating lever (23) is provided in the vicinity of the locking plate (18), and an abutting portion (21a) provided at the free end portion of the cam lever (21) is provided at the distal end portion of the arm facing obliquely downward. A hook portion (23a) capable of contacting is provided.

  When the restricting lever (23) is in the restricting position, the hook portion (23a) moves into the movement locus of the abutting portion (21a) of the cam lever (21) mainly as shown in FIG. When the cam lever (21) and the locking plate (18) are prevented from moving from the locked position to the unlocked position, and when the cam lever (21) is also in the permitted position, as shown mainly in FIG. ), The locking plate (18) and the cam lever (21) can be moved from the locked position to the unlocked position.

  When the restriction lever (23) is in the restriction position, the directions of the hook part (23a) of the restriction lever (23) and the contact part (21a) of the cam lever (21) are orthogonal to each other as shown in FIG. It is supposed to be. As a result, the cam lever (21) and the locking plate (18) can be reliably prevented from being moved to the unlock position.

  The engagement means according to the present invention is formed from a striker (9) and a latch (16) that can be engaged and disengaged, a locking plate (18) that can be engaged and disengaged with respect to the latch (16), and a cam lever (21). Is done.

  In the locked state according to the present invention, the latch (16) is engaged with the striker (9), and the hook portion (18a) of the locking plate (18) is engaged with the latch (16), that is, the seat (1 ) Is defined as being held in the seatable state (A) .In the unlocked state, the locking plate (18) and the cam lever (21) are unlocked based on the release operation of the operation handle (19). Is defined as a state in which the hook portion (18a) of the locking plate (18) is detached from the latch (16), that is, a state in which the seat (1) can be displaced to the non-sitting state (B).

  When the seat (1) is in the seatable state (A), the striker (9) on the side of the lower rail (4a) moves from the opening (not shown) provided on the floor (6) to the lower side of the floor (6). Enter and engage the latch (16). Further, the hook portion (18a) of the locking plate (18) is engaged with the latch (16) by the urging force of the spring (25) to restrain the latch (16) at the latch position.

  When the slide rail (4b) is in a position other than the predetermined position, the restriction lever (23) is in the standby position, and the restriction lever (23) is held in the restriction position. Accordingly, even if the operation handle (19) is released and the cam lever (21) and the locking plate (18) are rotated to the unlock position, the contact portion (21a) of the cam lever (21) is moved. The cam lever (21) and the locking plate (18) cannot be rotated to the unlock position because they come into contact with the hook portion (23a) of the regulating lever (23) entering the locus.

  When the slide rail (4b) is in a predetermined position, the restriction lever (23) is in the operating position, and the restriction lever (23) is held in the permitted position, so that the hook portion (23a) of the restriction lever (23) Is retracted out of the movement path of the contact portion (21a) of the cam lever (21), so that the cam lever (21) and the locking plate (18) are connected via the cable (20) when the operation handle (19) is released. Thus, it can be rotated from the locked position to the unlocked position. As a result, the striker (9) can be detached from the latch (16), so that the seat (1) can be displaced to the non-sitting state (B).

If the seat (1) is displaced from the seatable state (A) to the non-seatable state (B) while the backrest (3) is rotated from the standing posture to the forward leaning posture, the seat slide device (4) is also seated. Displaces integrally with (1). Thereby, since the rotation link (11) is separated from the restriction lever (23), the restriction lever (23) is rotated toward the restriction position by the urging force of the spring (26). At this time, as shown in FIG. 7, the tip of the hook portion (23a) of the regulating lever (23) contacts the blocking portion (21b) provided in the vicinity of the contact portion (21a) of the cam lever (21). By contacting, the rotation of the regulation lever (23) to the regulation position is temporarily prevented. When the release operation of the operation handle (19) is removed in this state, both the cam lever (21) and the locking plate (18) are rotated back from the unlocked position to the locked position by the urging force of the spring (25). To do. At this time, the blocking portion (21b) of the cam lever (21) is in sliding contact with the tip of the hook portion (23a) of the regulating lever (23) . Then, as shown in FIG. 8, the cam lever (21) and the locking plate (18) move to the locked position when the tip of the hook portion (23a) of the regulating lever (23) is detached from the blocking portion (21b). At the same time, the regulating lever (23) moves to the regulating position.

  The blocking portion (21b) is preferably an arc surface centered on the pivot (17). In the present embodiment, the tip end portion of the hook portion (23a) of the regulating lever (23) is brought into contact with the blocking portion (21b) of the cam lever (21). 23) may be provided with a protrusion protruding toward the blocking portion (21b), and the protruding portion may be brought into contact with the blocking portion (21b).

10 and 11 show a modification of the present invention.
In this modification, when the cam lever (21) and the locking plate (18) move back from the unlocked position to the locked position, the cam lever (21) and the locking plate are moved while the restricting lever (23) is moved from the restricted position to the permitted position. The plate (18) has a configuration that enables return movement. Specifically, the free end portion of the cam lever (21) is provided with a pushing portion (21c) that can come into contact with the tapered portion (23b) provided at the free end portion of the regulating lever (23). . As a result, when the cam lever (21) and the locking plate (18) move back from the unlocked position to the locked position, the pusher (21c) moves to the restricting position (position indicated by the solid line) as shown in FIG. The cam lever (21) and the locking plate (18) are brought into sliding contact with the tapered portion (23b) of the regulated lever (23) and the cam lever (21) is moved from the regulated position to the permitted position (position indicated by the imaginary line). The return movement can be performed. Then, as shown in FIG. 11, when the cam lever (21) and the locking plate (18) are moved to the locked position, the pushing portion (21c) is detached from the tapered portion (23b), and the regulating lever (23) is moved to the spring. It moves to the restricted position by the urging force of (26).
Since other configurations are the same as those in the above-described embodiment, the same configurations are denoted by the same reference numerals as those in the above-described embodiment, and detailed description thereof is omitted.

It is a side view of a sheet | seat provided with the seat latch apparatus concerning this invention. Similarly, it is a side view of the seat when the slide rail is at a position other than a predetermined position. Similarly, it is a side view of the seat when the slide rail is in a predetermined position. It is a side view of a seat latch device when a slide rail exists in positions other than a predetermined position. It is a side view of a seat latch device when a slide rail exists in a predetermined position. It is a side view of a seat latch device when a lock release member is released. It is a side view of a seat latch device when the release operation of a lock release member is removed. FIG. 6 is a side view of the seat latch device when the seat is displaced in a non-sitting state. It is a disassembled perspective view of a seat latch device. FIG. 10 is a side view of the seat latch device when the unlocking member showing the modification of the present invention is released. Similarly, it is a side view of the seat latch device when the seat is displaced to a non-sitting state.

Explanation of symbols

(1) Seat
(2) Seat
(3) Backrest
(4) Seat slide device
(4a) Lower rail
(4b) Slide rail
(5) Linkage
(6) Floor
(7) Concave
(8) Seat latch device
(9) striker
(10) Axis
(11) Rotating link
(12) Push section
(13) Bolt
(14) Base plate
(14a) Cover plate
(15) Axis
(16) Latch (meshing means)
(17) Axis
(18) Locking plate (meshing means)
(18a) Hook part
(19) Operation handle (lock release member)
(20) Cable
(21) Cam lever (meshing means)
(21a) Contact part
(21b) Blocking part
(21c) Pushing part
(22) Axis
(23) Regulator lever (regulator member)
(23a) Hook part
(23b) Taper
(24) Spring
(25) Spring (biasing means)
(26) Spring (biasing means)

Claims (2)

A slide rail that supports a seat supported so as to be displaceable between a seatable state and a non-seatable state on the vehicle body so as to be reciprocally movable with respect to the lower rail on the vehicle body side when in the seatable state is a predetermined predetermined When in the unlocked state, the seat can be moved from the locked state in which the seat can be held in the seatable state to the seatable state, based on the operation of the unlocking member provided at an appropriate position. In a seat latch device having engagement means operable to
When the slide rail is in a position other than the predetermined position, the slide means is held at a restriction position that prevents the engagement means from operating from the locked state to the unlocked state based on the operation of the unlocking member, and the slide A restricting member that can move from the restricting position to a permission position that allows the engagement means to operate from the locked state to the unlocked state based on the operation of the unlocking member by moving the rail to the predetermined position. With
The regulating member, while being pivoted in the vicinity of the meshing means, when in the restricted position, by entering the movement locus of the contact portion provided on said engagement means, the unlocked state of the engagement means A hook portion that prevents movement of the meshing means to an unlocked state by retreating out of the movement locus of the contact portion of the meshing means when in the permitted position. Yes, and
When the slide rail is in the predetermined position, the restricting member is held in a permission position, and when the seat moves toward a non-seatable state, the restricting member can be moved to the restricting position by an urging means,
The engagement means has a blocking portion capable of holding the restricting member in a permitted position while sliding on a protrusion provided on the restricting member when moving from the unlocked state toward the locked state.
The seat latch device according to claim 1, wherein the engagement member moves to a locked state and the restriction member moves to a restriction position when the protrusion is separated from the blocking part . A slide rail that supports a seat supported so as to be displaceable between a seatable state and a non-seatable state on the vehicle body so as to be reciprocally movable with respect to the lower rail on the vehicle body side when in the seatable state is a predetermined predetermined When in the unlocked state, the seat can be moved from the locked state in which the seat can be held in the seatable state to the seatable state, based on the operation of the unlocking member provided at an appropriate position. In a seat latch device having engagement means operable to
When the slide rail is in a position other than the predetermined position, the slide means is held at a restriction position that prevents the engagement means from operating from the locked state to the unlocked state based on the operation of the unlocking member, and the slide A restricting member that can move from the restricting position to a permission position that allows the engagement means to operate from the locked state to the unlocked state based on the operation of the unlocking member by moving the rail to the predetermined position. With
The restricting member is pivotally supported in the vicinity of the meshing means, and enters the movement locus of the abutting portion provided in the meshing means so as to be orthogonal to the abutting portion when in the restricting position. The engagement means is prevented from moving to the unlocked state, and when in the permitted position, the engagement means is retracted out of the movement locus of the contact portion, thereby unlocking the engagement means. Having a hook part that allows movement to the state,
When the slide rail is in the predetermined position, the restricting member is held in a permission position, and when the seat moves toward a non-seatable state, the restricting member can be moved to the restricting position by an urging means,
The engagement means has a blocking portion capable of holding the restricting member in a permitted position while sliding on a protrusion provided on the restricting member when moving from the unlocked state toward the locked state.
The seat latch device according to claim 1, wherein the engagement member moves to a locked state and the restriction member moves to a restriction position when the protrusion is separated from the blocking part.

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