JPH1044847A - Seat locking device - Google Patents

Abstract

(57) [Problem] To provide a seat locking device capable of securely locking a seat cushion to a floor even when a large load acts on the seat cushion in a use position. SOLUTION: A seat cushion 1 is pivotally attached to a floor 3 by a hinge portion 4 and is rotatably provided at a use position A and a storage position B. When the seat cushion 1 is turned to the use position, the seat is In the seat lock device for locking the seat cushion 1 to the floor 3 by engaging a lock member 8 provided on one of the cushion 1 and the floor 3 with a striker 5 provided on the other, the lock member 8 Movement restricting member 1 for restricting relative movement of lock member 8 and striker 5 when engagement of striker 5 with striker 5.
0 was provided. The movement restricting member 10 is configured to move the striker 5 in a direction substantially perpendicular to the axial direction in which the lock member 8 and the striker 5 are engaged.
And a predetermined gap t1 is provided. Movement restriction member 10
Is provided substantially parallel to the axial direction in which the lock member 8 and the striker 5 engage with a predetermined gap t1 from the striker 5.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a seat capable of rotating a seat cushion between a use position and a storage position.
In particular, the present invention relates to a locking device that can reliably lock the operating position.

[0002]

2. Description of the Related Art Conventionally, for example, in a vehicle seat, as shown in FIG. 5 (A), a front leg portion 1a of a seat cushion 1 is pivotally connected to a floor 3 by a hinge portion 4, and a use position indicated by a solid line. A, the seat back 2 is moved forward with the seat cushion 2 together with the seat back 2 by the hinge 4.
Has been proposed to be rotated forward to a storage position B indicated by a two-dot chain line. (See No. 6-60525)

In the above-described vehicle seat, when the seat cushion 1 is rotated backward to the use position A, the inverted U-shaped striker 5 provided on the floor 3 is provided with a lock member (provided on the seat cushion 1). Fork) 6
The seat cushion 1 is locked on the floor 3.

[0004]

However, FIG.
(B) As shown in FIG.
When the large load is applied, the lock member 6 also moves in the front-rear direction C together with the seat cushion 1, so that the lock member 6 may come into contact with the support portions 5 a and 5 b of the striker 5. As shown in FIG. 5C, when a large load in the left-right direction is applied to the seat cushion 1, the lock member 6 moves in the left-right direction C together with the seat cushion 1. Engaging shaft 5c
There was a risk that the amount of engagement with the shaft would decrease.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problem, and an object of the present invention is to provide a seat locking device capable of securely locking a seat cushion to a floor even when a large load acts on the seat cushion in a use position. Is the subject.

[0006]

According to a first aspect of the present invention, a seat cushion is pivotally attached to a floor by a hinge so as to be rotatable between a use position and a storage position. When the seat cushion is rotated to a use position, a seat provided on one of the seat cushion and the floor is engaged with a striker provided on the other to lock the seat cushion on the floor. The lock device according to the above, further comprising a movement restricting member for restricting a relative movement between the lock member and the striker when the lock member and the striker are engaged with each other.

According to the first aspect, when a large load is applied to the seat cushion in a state where the seat cushion is rotated to the use position and the lock member and the striker are engaged to lock the seat cushion to the floor, The relative movement of the lock member and the striker is regulated by the regulating member. When a large load acts on the seat cushion in the front-rear direction, there is no possibility that the lock member comes into contact with the strut of the striker and is abnormally deformed. Further, when a large load in the left-right direction is applied to the seat cushion, the amount of engagement of the striker of the lock member with the engagement shaft portion does not decrease.

More specifically, the movement restricting member may be provided with a predetermined gap from the striker in a direction substantially perpendicular to the axial direction in which the lock member and the striker engage. it can. According to the configuration of claim 2, when a large load in the front-rear direction is applied to the seat cushion, the movement restricting member comes into contact with the striker to restrict the front-rear movement of the lock member.

Further, as in claim 3, the movement restricting member can be provided with a predetermined gap from the striker substantially in parallel to the axial direction in which the lock member and the striker engage. According to the configuration of claim 3, when a large left-right direction load is applied to the seat cushion, the movement restricting member comes into contact with the striker to restrict the lateral movement of the lock member.

As a result, the lock member contacts the striker and is abnormally deformed, and the amount of engagement of the lock member with the striker is not reduced.

According to a fourth aspect of the present invention, the lock member includes a fork engaged with the striker, and a locking member for locking the fork. The movement restricting member is disposed near the mounting portion of the locking member. It can be configured to be opposed.

According to the structure of claim 4, when an excessive turning force in the disengagement direction acts on the lock member due to a large vertical load acting on the seat cushion or the like, the lock member moves from the lock member to the engagement member. The mounting portion of the locking member may be deformed by the acting force and the locking member may be disengaged from the locking member. However, by moving the movement restricting member close to and near the mounting portion of the locking member, the mounting portion Can abut on the movement restricting member to prevent the deformation of the mounting portion.

[0013]

Embodiments of the present invention will be described below in detail with reference to the drawings. The parts having the same configuration and operation as those of the prior art in FIG. 5 are denoted by the same reference numerals, and detailed description is omitted. As shown in FIG. 4A, the seat cushion 1
On the other hand, the striker 5 is arranged such that the engagement shaft 5c is in the front-rear direction C, and as shown in FIG.
There is a method of arranging the engagement shaft portion 5c so as to be in the left-right direction D. In the present embodiment, the former arrangement method is employed, but the latter arrangement method may be employed. When the former arrangement method is adopted, a lock member (fork) 8, a locking member 9, and a support bracket 10, which will be described later, have the arrangement relationship shown in FIG. Since the striker 5 is provided at two positions on the left and right with respect to the seat cushion 1, the lock members 8 and the like are also provided at two positions on the left and right. If provided at a location, the lock member 8 and the like may be provided at one location at the center.

In this embodiment, the striker 5 is attached to the floor (vehicle body) 3 and the lock member 8 is attached to the seat cushion 1.
May be attached to the seat cushion 1, and the lock member 8 and the like may be attached to the floor 3.

As shown in FIG. 2A viewed from the direction F in FIG. 4C, an upper rail 12 of a slider 11 is fixed to the bottom surface of the seat cushion 1, and the front leg is attached to a lower rail 13 of the slider 11. The part 1a is fixed,
The seat cushion 1 can be slid back and forth. Note that the front and rear positions of the lower rail 13 do not change even if the seat cushion 1 is slid back and forth together with the upper rail 12.

As shown in FIGS. 2A and 3, the assembly bracket 14 and the bifurcated support bracket 10, which are bent in an inverted L-shape, have their inner ends 14a, 10a overlapped. At the bottom of the lower rail 13 with pins 15.

As shown in FIG. 1, when the seat cushion 1 is rotated backward to the use position A, the striker 5 attached to the floor 3 is fitted to the outer end 10b of the support bracket 10 from above and below. A recess 10c that fits is provided. The recess 10 c is provided in the front support 5 of the striker 5.
a and the front end 10e and the rear end 1 at the front and rear positions of the rear support 5b.
0f and the inner end 10g at the inner position are set so as to be separated from each other by a predetermined gap t1 (see FIGS. 1B and 2A). Outer end 10 provided with this recess 10c
In order to reinforce b, bent portions 10d are formed on both sides of the outer end portion 10b.

As shown in FIG. 3, upper flange portions 17a, 18a of a pair of base brackets 17, 18 are provided at the outer end 14b of the inverted L-shape of the mounting bracket 14, as shown in FIG.
Are fixed with screws 16.

A lock member 8 and a rubber sheet 19 are interposed between the two base brackets 17 and 18, and a rotation hole 8 a of the lock member 8 and a rubber sheet 19 are supported from a support hole 18 b of one base bracket 18. The lock member 8 is rotatably supported by a support shaft 20 that penetrates through the hole 19a of the base bracket 17 and is caulked and fixed to the support hole 17b of the other base bracket 17. The rubber sheet 19 absorbs the gap between the base brackets 17 and 18 so that the lock member 8 does not rattle in the axial direction.

One end 21a of a wire spring 21 wound around the head of the support shaft 20 is connected to the base bracket 1
8, the other end 21 b penetrates through the arc hole 18 c of the base bracket 18 and is locked in the locking hole 8 b of the lock member 8, and the lock member 8 is engaged by the wire spring 21. It is urged in the direction of releasing the combination (clockwise direction in the figure). The lock member 8 is stopped by a stopper so as not to rotate beyond the disengagement position of the striker 5 (see FIG. 2C).

The lock member 8 is used for the seat cushion 1.
Is rotated back to the use position A, the engagement shaft 5c of the striker 5 pushes up the upper arm 8c to rotate the lock member 8 to the engagement position against the urging force of the wire spring 21. The lower arm 8d engages with the engagement shaft 5c to lock the seat cushion 1 to the floor 3.

The tip 8 of the upper arm 8c of the lock member 8
The lower portion 9a of the locking member 9 is attached to the bent portion 17c of the base bracket 17 facing e by a pin 23 so as to be rotatable in a direction orthogonal to the locking member 8. Wire spring 24 wound around the head of the pin 23
Is locked to the base bracket 17, the other end 24 b is locked to the fixing pin 26 of the unlocking lever 25, and the locking member 9 is locked by the wire spring 24 in the locking direction (leftward turning direction in the figure). ).

When the lock member 8 is rotated in the engagement direction from the state shown in FIGS.
2A by rotating the locking member 9 in the unlocking direction against the urging force of the wire spring 24, as shown in FIG.
As shown in (B), the upper end 9b is the tip 8e of the upper arm 8c.
To lock the lock member 8 at the engagement position. The lock member 9 is rotated in the lock release direction by manually pulling the lock release lever 25 in the J direction (see FIG. 3), and releases the lock of the lock member 8.

The lower end 17 of the bent portion 17c of the base bracket 17 near the mounting portion of the lower portion 9a of the locking member 9
d is closely opposed to the support bracket 10 so as to be covered with the upper surface 10e of the outer end 10b of the support bracket 10.

If the lock device is configured as described above, when the seat cushion 1 is rotated backward from the storage position B to the use position A, the support bracket 1 of the seat cushion 1 is rotated.
0, the recess 10c fits into the striker 5 of the floor 3, and the engagement shaft 5c of the striker 5 pushes up the upper arm 8c to rotate the lock member 8 to the engagement position, and the lower arm 8
The seat cushion 1 is locked to the floor 3 by the engagement of the d with the engagement shaft 5c. At this time, the tip 8e of the upper arm 8c of the lock member 8 is
b, the lock member 8 is locked at the engagement position.

In this state, when a large load in the front-rear direction C is applied to the seat cushion 1, the front end 10 e and the rear end 10 f of the recess 10 c of the support bracket 10 are attached to the front support 5 a and the rear support 5 b of the striker 5. The contact makes the forward and backward movement of the lock member 8 restricted. As a result, the lower arm 8d of the lock member 8 is
a, 5b to prevent abnormal deformation and striker 5
Therefore, there is no possibility that the lock member 8 is accidentally disengaged.

When a large load in the left-right direction D is applied to the seat cushion 1, the inner end 10g of the concave portion 10c of the support bracket 10 is attached to both struts 5a, 5b of the striker 5.
5b, the movement of the lock member 8 in the left-right direction D is regulated. Thereby, the amount of engagement of the lower arm portion 8b of the lock member 8 with the engagement shaft portion 5c of the striker 5 does not decrease, and the engagement of the lock member 8 from the striker 5 may be inadvertently disengaged. Disappears.

Further, the seat cushion 1 is vertically
Of the striker 5 due to the large load of
When a forcible rotational force in the disengagement direction acts on the lower arm 8d of the lock member 8 from c, a downward force acting on the locking member 9 from the distal end 8e of the lock member 8 via the upper end 9b, The lower portion of the bent portion 17c of the base bracket 17 near the mounting portion by the pin 23 of the locking member 9 is deformed inward, and the upper end 9b of the locking member 9 is locked to the tip 8e of the locking member 8. May come off. At this time, since the lower end 17d of the bent portion 17c of the base bracket 17 is closely opposed so as to be covered by the upper surface 10e of the outer end portion 10b of the support bracket 10, the bent portion 17c is positioned on the upper surface 10e of the support bracket 10. The locking member 9 is not easily deformed by contact with the locking member 9, and there is no possibility that the locking member 8 is inadvertently released by the locking member 9.

[0029]

As is apparent from the above description, the lock device of the present invention is such that when a large load acts on the seat cushion, the relative movement between the lock member and the striker is restricted by the position restricting member. Therefore, there is no danger that the lock member comes into contact with the strut portion of the striker and the lock member is accidentally disengaged from the striker due to abnormal deformation of the lock member, and the amount of engagement of the lock member with the strike shaft of the striker is reduced. Therefore, there is no danger that the engagement amount is reduced and the engagement is accidentally disengaged from the striker.

According to a second aspect of the present invention, the movement restricting member is provided at a predetermined gap from the striker in a direction substantially perpendicular to the axial direction in which the lock member and the striker engage. When the heavy load is applied, the movement restricting member comes into contact with the striker, and the longitudinal movement of the lock member is restricted.

Further, when the movement restricting member is provided with a predetermined gap from the striker substantially in parallel to the axial direction in which the lock member and the striker engage, the left and right directions can be provided on the seat cushion. When a large load is applied, the movement restricting member comes into contact with the striker, and the lateral movement of the lock member is restricted.

As a result, the lock member does not abnormally deform due to contact with the striker, and the amount of engagement of the lock member with the striker does not decrease. In addition, the movement restricting member has a simple structure and is inexpensive, and can be adopted with a slight modification to an existing lock device.

According to a fourth aspect of the present invention, the lock member is provided with a fork that engages with the striker, and a locking member that locks with the fork. With this configuration, when an excessive force in the disengagement direction acts on the lock member due to a large vertical load acting on the seat cushion or the like,
The mounting portion of the locking member may be deformed by the force acting on the locking member from the locking member and the locking member may be unlocked from the locking member, but the movement restricting member is located near the mounting portion of the locking member. By facing, the attachment portion comes into contact with the movement restricting member, so that the attachment portion can be prevented from being deformed.

[Brief description of the drawings]

FIG. 1 shows a positional relationship between a lock member and a striker with respect to a support bracket of a lock device of the present invention,
(A) is a perspective view seen from the floor side, (B) is a front view.

2A and 2B are lock devices viewed from a direction F in FIG. 4C, wherein FIG. 2A is a cross-sectional view at the time of locking, and FIG.
FIG. 7C is a cross-sectional view taken along line G, FIG. 7C is a cross-sectional view when unlocked, and FIG. 7D is a cross-sectional view taken along line HH in FIG.

FIG. 3 is an exploded perspective view of the lock device as viewed from the floor side.

FIGS. 4A and 4B are plan views each showing an arrangement of a striker, and FIG. 4C is a plan view showing an arrangement of a locking device.

FIG. 5A is a side view of a vehicle seat provided with a conventional locking device, FIG. 5B is a plan view showing a positional relationship between a striker and an engaging member, and FIG. 5C is an EE of FIG. It is a line sectional view.

[Description of Signs] 1 seat cushion 3 floor 4 hinge part 5 striker 5a front support part 5b rear support part 8 locking member 9 locking member 10 support bracket (movement restricting member) 10c recess 17 base bracket A use position B storage position

Claims (4)

[Claims] 1. A seat cushion is pivotally attached to a floor by a hinge portion so as to be rotatable between a use position and a storage position, and when the seat cushion is rotated to the use position, the seat cushion is connected to the floor. In a seat lock device for locking a seat cushion to a floor by engaging a lock member provided on either one with a striker provided on one of the other members, when the lock member and the striker are engaged, A seat lock device provided with a movement restricting member for restricting relative movement. 2. The seat locking device according to claim 1, wherein the movement restricting member is provided at a predetermined gap from the striker in a direction substantially perpendicular to an axial direction in which the lock member and the striker engage. 3. The seat lock device according to claim 1, wherein the movement restricting member is provided at a predetermined gap from the striker substantially in parallel to an axial direction in which the lock member and the striker engage. 4. The lock member is provided with a fork engaged with a striker, and a locking member for locking the fork, and the movement restricting member is brought close to and near a mounting portion of the locking member. The seat lock device according to any one of claims 1 to 3.