JP2001047915A - Housing link mechanism of lock mechanism for seat - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent impairment of a housing function and a return function by providing a spring means for regulating rotation of a prescribed quantity of a first link allowed by an engaging means by being stretched between the front end part side of a seat cushion and the first link by prescribed force. SOLUTION: Impact force is transmitted to a first link 21 via a second link 22 to rotate the first link 21 in the anticlockwise direction to a support bracket 25 by overcoming spring force of a spring 23. Thus, this impact force is received by the first link 21, and is damped by the action of the spring 23 to prevent deformation of the first link 21 and the second link 22. Thus, the positional relationship between a lock mechanism 20a and a deck side striker 28 of a cabin floor is not changed, a lock function of the lock mechanism 20a is not impaired, and a housing function and a return function of a housing link mechanism 20b to the lock mechanism 20a are not impaired.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a storage link mechanism for a seat lock mechanism.

[0002]

2. Description of the Related Art As one type of a seat lock mechanism, a rear end of a seat cushion constituting a vehicle seat is releasably locked with respect to a passenger compartment floor. There is a seat lock mechanism of a type in which a vehicle seat can be stored starting from a front end of the seat cushion by releasing a lock of the seat cushion with respect to a passenger compartment floor.

A lock mechanism of this type protrudes below a seat cushion and is exposed to the outside in a state of protruding from the seat cushion when the vehicle seat is retracted. In order to store the lock mechanism at the same time as the storage, the lock mechanism is rotatably arranged, and when storing the vehicle seat, the storage mechanism is rotated to the lower side of the seat cushion to be in the storage state. Means to establish it.

The storage link mechanism has a first link having one end rotatably connected to the front end of the seat cushion, one end rotatably connected to the first link, and the other end connected to the lock mechanism. And a second link that rotates the lock mechanism when the first link rotates and retracts the lock mechanism on the lower surface side of the seat cushion. When the vehicle seat is retracted, the lock is released. The locking mechanism detached from the striker on the vehicle cabin floor side is gradually rotated toward the lower surface side of the seat cushion in accordance with the retracting operation of the seat cushion, and is stored. The lock mechanism in the state is gradually projected from the lower surface side of the seat cushion in response to the return operation of the seat cushion, and the lock mechanism can be locked to the striker on the vehicle floor side. And such state.

[0005]

As described above, in the storage link mechanism, when returning the vehicle seat in the storage state, the locking mechanism in the storage state is gradually rotated from the lower surface side of the seat cushion. Let it protrude,
If a large impact force acts on the lock mechanism in this state, the link may be deformed, and when the link is deformed, the positional relationship between the lock mechanism and the striker on the vehicle floor changes, and the lock of the lock mechanism is locked. The function is impaired, and the storage function and the return function for the lock mechanism of the storage link mechanism are impaired. Accordingly, it is an object of the present invention to address these issues.

[0006]

SUMMARY OF THE INVENTION The present invention relates to a storage link mechanism of a seat lock mechanism, which is rotatably disposed at a rear end of a seat cushion constituting a vehicle seat, and is provided with the same. The rear end of the seat cushion is releasably locked to the passenger compartment floor, and the lock of the seat cushion to the passenger compartment floor is released, so that the vehicle seat can be stored from the front end of the seat cushion as a base point. The storage link mechanism for storing the mechanism is also applied.

The storage link mechanism according to the present invention comprises a first link having one end rotatably connected to the front end of the seat cushion, and one end rotatably connected to the first link. A storage link mechanism having a second link connected to the other end of the lock mechanism and rotating the lock mechanism when the first link rotates to store the lock on the lower surface side of the seat cushion. An engagement means provided between a front end side of the seat cushion and the first link to allow a predetermined amount of rotation of the first link with respect to a front end of the seat cushion; and the seat cushion. Spring means extending between a front end portion of the first link and the first link to restrict a predetermined amount of rotation of the first link permitted by the engagement means with a predetermined force. Characterized by A.

In the storage link mechanism according to the present invention,
The engaging means is smaller than an engaging recess provided on the front end side of the seat cushion and having a predetermined width and provided in the first link and located in the engaging recess. It can be constituted by an engaging projection having a width.

Further, in the storage link mechanism according to the present invention, there is provided a vehicle seat wherein a leg supporting the front end of the seat cushion is rotatably connected to a front end of the seat cushion via a support bracket in a front-rear direction. In this case, one end of the first link is rotatably connected to the support bracket, and an engagement recess forming the engagement means is provided on the support bracket. It can be provided.

[0010]

In the storage link mechanism according to the present invention, a predetermined amount of rotation of the first link, which is permitted by the engagement means, is normally restricted by the action of the spring means. The lock mechanism functions in the same manner as the conventional storage link mechanism, stores the lock mechanism on the seat cushion side in response to the storage operation of the vehicle seat, and performs the return operation from the storage state of the vehicle seat. In response, it protrudes from the lower surface side of the seat cushion and returns.

In this case, when a large impact force acts on the lock mechanism, this impact force is transmitted to the first link via the second link, and overcomes the spring force of the spring means to rotate the first link. Let it. As a result, the impact force is received by the first link and is attenuated by the action of the spring means, thereby preventing the deformation of the first link and the second link. Therefore, the positional relationship between the lock mechanism and the striker on the passenger compartment floor side does not fluctuate, and the lock function of the lock mechanism is not impaired, and the storage function of the storage link mechanism with respect to the lock mechanism is prevented. Also, the return function is not impaired.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the drawings. FIGS. 1 and 2 show a rear seat for a vehicle to which the storage link mechanism of the lock mechanism according to the present invention is equipped. The rear seat is a double fold-down seat of a side-by-side three-seat type, and includes a side seat 10a as a left and right side seat and a center seat 10b as a center seat. Each side seat 10a is rotatably supported in the front-rear direction in the recess f1 of the passenger compartment floor via a link portion of the leg portion 12 rotatably mounted on the front end side of the lower surface of the seat cushion 11. At the same time, the seat cushion 11 is detachably locked to a deck f2 on the passenger compartment floor via a lock mechanism 20a provided on the rear end side of the lower surface of the seat cushion 11.

Each of these side seats 10a is unlocked by the lock mechanism 20a with respect to the deck f2 of the passenger compartment floor, so that the seat back 13 is folded over the seat cushion 11 as shown in FIG.
It is configured to be folded forward so as to be substantially at the same level as the deck f2 of the passenger compartment floor, and to be stored in the concave portion f1. The center seat 10b is detachably connected to one side of the seat cushion 11 of the right side seat 10a in the drawing via a connection mechanism (not shown) through a connection mechanism (not shown). It is supported on the deck f2 and faces the tunnel f3 on the passenger compartment floor. For this reason, the center sheet 10b is separated from the side sheet 10a when the side sheet 10a is stored in the concave portion f1,
And it is configured to be detached from the deck f2.

As shown in FIG. 3, each side seat 10a has a storage link mechanism 2 according to an embodiment of the present invention.
0b is provided. The storage link mechanism 20b includes a first link 21, a second link 22, and a spring 23. The first link 21 has a substantially triangular shape and corresponds to the first link of the present invention. The second link 22 has a rod shape and corresponds to the second link of the present invention. It corresponds to a spring means.

At one corner of the first link 21, a cushion frame 11a constituting the seat cushion 11 is provided.
Is rotatably connected to a bracket 11b provided at a front end of the second link 22. A tip of a second link 22 is rotatably connected to another corner, and a spring 23 is attached to the remaining corner.
Is hooked at one end. The rear end of the second link 22
The lock mechanism 20a is rotatably connected to a base 24 of a lock mechanism 20a rotatably supported by a bracket 11c provided at a rear end of the cushion frame 11a.

The connection point of the rear end of the second link 22 to the base 24 is located behind and below the connection point of the lock mechanism 20a to the bracket 11c, and projects the lock mechanism 20a toward the lower surface of the seat cushion 11. In this case, the connection point is brought into contact with a stopper 11d provided at the rear end of the cushion frame 11a to thereby reduce the distance between the rotation center of the lock mechanism 20a and the front end of the cushion frame 11a and the striker 28 on the passenger compartment floor. Kept constant.

The other end of the spring 23 is hooked on a support bracket 25 rotatably connected to a bracket 11b provided at the front end of the cushion frame 11a. The support bracket 25 is fixed to the upper end of the leg main body 12 a constituting the leg 12, and connects the leg 12 to the bracket 11 b of the seat cushion 11. The support bracket 25 is rotatably connected to the bracket 11b, and the support bracket 25 and the first link 21 are coaxially connected to the bracket 11b, and the connection points coincide with each other. .

The lock mechanism 20a is known per se, and a spring (not shown) stretched between the pawl 26 and the ratchet 27 rotatably supported in the left and right bases 24 and between the pawl 26 and the ratchet 27. The hook portion of the ratchet 27 is hooked on the striker 28 provided on the deck f2 of the vehicle cabin floor, thereby functioning to lock the rear end of the seat cushion 11 to the deck f2. This locked state is released by rotating the release lever (not shown) to rotate the pawl 26 counterclockwise in the figure. When the pawl 26 rotates in the same direction, the ratchet 27 rotates in the same direction by the action of a spring (not shown), and the hook portion of the ratchet 27 separates from the striker 28.

As shown in FIGS. 4 and 5, the leg 12 supporting the front end of the seat cushion 11 includes a leg body 12a and a link 12b.
a is rotatably connected at its lower end to an upper end of a link portion 12b, and the link portion 12b is rotatably supported at its lower end by a concave portion f1 of the passenger compartment floor. In the leg 12 having such a configuration, the leg main body 12a
Is provided with a hook portion 12c at a portion behind the lower end portion of
When the leg portion 12 is in the upright state, the hook portion 12c is engaged with the engaging portion f5 provided on the upright wall portion f4 that divides the recess f1 of the passenger compartment floor and the deck f2, thereby raising the leg portion 12. Hold in state.

In the leg portion 12, when the seat is pushed forward, the leg body 12a rotates counterclockwise in the figure around the connection portion with the link portion 12b, and the hook portion 12a is rotated.
c is disengaged from the engaging portion f5, and is further rotated in the same direction, and the link portion 12b is rotated counterclockwise around the attachment portion with the concave portion f1. The leg body 1 of the leg 12
The seat cushion 11 is moved downward by moving the seat cushion 11 forward and downward by the bending operation centering on the connecting portion of the link portion 2a and the link portion 12b, and is stored in the recess f1 of the passenger compartment floor.

In the storage link mechanism 20b having such a configuration, an engagement means 20c is provided between the first link 21 and the support bracket 25. As shown in an enlarged manner in FIG. 4, the engagement means 20 c includes an engagement protrusion 21 a provided on the first link 21 side and an engagement recess 2 provided on the support bracket 25 side.
5a, the engagement protrusion 21a
Is inserted into the engagement recess 25a, and is held at a neutral position in the engagement recess 25a by the action of the spring 23. The spring 23 has an engagement protrusion 21 a formed in the engagement recess 2.
The first link 21 is held in the neutral position within 5a.
And the rotation of the first link 21 with respect to the support bracket 25 is restricted by a predetermined force.

The storage link mechanism 20b thus configured
In the side seat 10a equipped with the seat back 13, the seat back 13 falls down on the seat cushion 11 to shift from the standing state shown in FIG. 1 to the retracted state as shown in FIG. The lock on the deck f2 of the passenger compartment floor is released, and the seat cushion 11 and the seat back 13 are integrally pushed forward. As a result, the leg portion 12 bends around the connecting portion between the leg portion main body 12a and the link portion 12b, and the bending operation causes the seat cushion 11 to move downward while moving forward, so that the inside of the recess f1 of the vehicle cabin floor. To be stored.

In the meantime, in the storage link mechanism 20b, the support bracket 25 is rotated counterclockwise in the drawing by the forward and downward movement of the seat cushion 11, and the engagement projection 21a constituting the engagement means 20c is engaged. Recess 25
The first link 21 is rotated in the same direction by contacting the rear end wall of the first link 21a. As a result, the first link 21 pulls the second link 22 to the left in the drawing, and rotates the lock mechanism 20a clockwise about the connecting portion to the bracket 11c so that the lock mechanism 20a moves to the lower surface of the seat cushion 11. Store to the side. When returning the side seat 10a in the stored state to the upright state, the side sheet 1
0a and the storage link mechanism 20b operate in the opposite direction to the storage, to move the side seat 10a onto the deck f2 of the passenger compartment floor, and to protrude the locking mechanism 20a from the lower surface side of the seat cushion 11 to lock the seat. The rear end of the seat cushion 11 is locked on the deck f2 of the passenger compartment floor by the mechanism 20a.

By the way, when the side seat 10a is moved onto the deck f2 of the passenger compartment floor, the seat cushion 11
When the lock mechanism 20a gradually projecting from the lower surface side of the vehicle abuts on a load or the like left behind on the deck f2 on the passenger compartment floor, the lock mechanism 20a receives a large impact force in the direction of pushing up the second link 22. . In this case, the impact force is transmitted to the first link 21 via the second link 22, and overcomes the spring force of the spring 23 to rotate the first link 21 counterclockwise with respect to the support bracket 25. As a result, the impact force is received by the first link 21 and attenuated by the action of the spring 23 to prevent the first link 21 and the second link 22 from being deformed. Therefore, the positional relationship between the lock mechanism 20a and the striker 28 on the deck f2 side of the passenger compartment floor does not change, the locking function of the lock mechanism 20a does not deteriorate, and the storage link mechanism 20b The storage function and the return function for the lock mechanism 20a are not impaired.

[Brief description of the drawings]

FIG. 1 is a schematic perspective view showing an upright state of a side seat provided with a storage link mechanism according to the present invention.

FIG. 2 is a schematic perspective view showing a stored state of the side seat.

FIG. 3 is a side view showing the storage link mechanism.

FIG. 4 is a partial side view showing a front part of the storage link mechanism.

FIG. 5 is a partial side view showing a lower portion of a leg constituting the side seat.

[Explanation of symbols]

10a: side seat, 10b: center seat, 11 ...
Seat cushion, 11a ... Cushion frame, 11
b, 11c: bracket, 12: leg, 12a: leg body, 12b: link, 12c: hook, 13: seat back, 20a: lock mechanism, 20b: storage link mechanism, 20c: engagement means, 21 .. 1st link, 21a ... engaging projection, 22 ... 2nd link, 23 ... spring, 24
... base, 25 ... support bracket, 25a ... engagement recess,
26 ... Paul, 27 ... Ratchet, 28 ... Striker,
f1: recess on the cabin floor, f2: deck on the cabin floor, f
3 ... Tunnel part of the cabin floor, f4 ... Standing wall part of the cabin floor, f5 ... Engagement part of the cabin floor.

 ──────────────────────────────────────────────────続 き Continuing from the front page (72) Inventor Atsushi Mitsuhashi 25, Katoike, Yoshiwara-cho, Toyota-shi, Aichi Araco Co., Ltd. (72) Inventor Shigeru Nakagawa 1-Toyota-cho, Toyota-shi, Aichi Pref. (72) Inventor Naoki Wakasugi No-address in Taurakomachi, Yokosuka City, Kanagawa F-term in Kanto Automobile Industry Stock (Reference) 3B087 CA12 CB13

Claims (3)

[Claims] 1. A vehicle according to claim 1, further comprising a rotatable rear end portion of a seat cushion constituting a vehicle seat, wherein the rear end portion of the seat cushion is releasably locked to a vehicle cabin floor. A storage link mechanism that stores a seat lock mechanism that allows a vehicle seat to be stored with the front end of the seat cushion as a base point by releasing a lock on a room floor, and one end is provided on the front end side of the seat cushion. A first link rotatably connected to the first link, and one end rotatably connected to the first link and the other end connected to the lock mechanism side to lock the first link when the first link rotates. In a storage link mechanism provided with a second link for rotating a mechanism and storing it on the seat cushion side, a front end side of the seat cushion and the first link are provided.
Engagement means provided between the first and second links to allow a predetermined amount of rotation of the first link with respect to the front end of the seat cushion; and a front end of the seat cushion and the first link.
And a spring means for restricting a predetermined amount of rotation of the first link permitted by the engagement means with a predetermined force. Storage link mechanism. 2. The storage link mechanism according to claim 1, wherein the engagement means is provided on an engagement recess having a predetermined width provided on a front end side of the seat cushion and on the first link. A storage link mechanism for a seat lock mechanism, comprising: an engagement protrusion having a smaller width dimension than the engagement recess located in the engagement recess. 3. The storage link mechanism according to claim 1, wherein the leg supporting the front end of the seat cushion is rotatably connected to the front end of the seat cushion in the front-rear direction via a support bracket. One end of the first link is rotatably connected to the support bracket, and an engagement recess forming the engagement means is provided in the support bracket. A storage link mechanism for a seat lock mechanism.