JP3364108B2 - Vehicle seat lock device - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle seat lock for fixing a seat, which moves forward and backward in the vehicle length direction and is slidable forward from the most advanced lock position, to an arbitrary position behind the most advanced lock position. Regarding the device.

[0002]

2. Description of the Related Art In recent years, a variety of passenger cars have been desired, and for example, there is a demand to secure a wide luggage space which is continuous from the luggage compartment as required in the passenger compartment.
For this reason, a flat surface is continuously formed from the front seat to the rear seat. Specifically, tilt the front seat back that constitutes the front seat to the rear,
A structure is employed in which the front seat back is brought into contact with the front end portion of a rear seat cushion that constitutes a rear seat and is disposed substantially flush with the upper surface of the rear seat cushion.

In this case, in order to form a flat surface which is continuous from the front seat to the rear seat as described above, it is necessary to slide the front seat cushion forward of the most advanced lock position. That is, as shown in FIG. 8, with the front seat cushion 3 moved to the most advanced lock position 2 of the front seat 1, the front seat back 4
When the vehicle is tilted backward, a portion 7 in which the front seat back 4 interferes with the front end portion of the rear seat cushion 6 of the rear seat 5 is generated.

Therefore, as shown in FIG. 9, a device has been adopted in which a slide portion 8 is provided forward (in the direction of arrow X) from the most distal lock position 2 over a predetermined distance H. Therefore, the front seat 1 is slid forward along the slide portion 8 from the most advanced lock position 2, and the front seat back 4 and the front seat cushion 6 are brought into contact with each other to form substantially the same surface. Can be placed on top.

[0005]

By the way, particularly in a vehicle having a high seating position (hip point), in order to improve the operability when the seat is slid, the unlocking operation lever is placed close to the lower surface of the seat cushion. The structure provided is used.

However, when the operation lever is brought closer to the seat cushion, the distance between the axis of the rod member for rotating the lock member for fixing the seat cushion at a predetermined position and the center of gravity of the operation lever increases. The weight of the operating lever increases. This allows
A considerably large moment of inertia acts on the lock member, which makes it difficult to quickly rotate the lock member toward the engagement portion (lock hole) side.

Therefore, as the sliding speed of the seat increases, a so-called "lock tooth jumping" is caused in which the lock member locks at a position displaced by passing the desired engaging position. The problem has been pointed out. Therefore, there is a problem that the operability when sliding the seat is deteriorated and the lock member and the engaging portion are easily damaged.

The present invention solves this type of problem, and is capable of quickly and reliably fixing the seat to a desired lock position and also capable of sliding the seat at a high speed. An object of the present invention is to provide a locking device for the.

[0009]

In order to solve the above problems, in a vehicle seat locking device according to the present invention, a locking member for stopping the seat at a predetermined locking position is engaged with a rod member. The rod member and the operating lever are connected via a link mechanism. And
While the lock member is rotated in the unlock direction via the operation lever, the lock member is rotatable in the lock direction separately from the operation lever via the link mechanism.

As a result, even in a vehicle in which the operating lever is provided close to the seat, such as a vehicle having a high seating position, the moment of inertia of the operating lever is affected when the lock member rotates in the locking direction. Never be done. Therefore, high-speed locking by the locking member becomes possible, and even if the position or size of the operating lever is variously changed, quick locking operation by the locking member is smoothly performed,
Even if the sliding speed of the sheet increases, the sheet can be reliably fixed at a desired position.

Here, the link mechanism includes a first link connected to the operation lever, a second link connected to the rod member, and a third link engaging with the first and second links. There is. When the operation lever is operated in the unlock direction, the lock member is integrally rotated in the unlock direction via the first to third links, and when the operation lever is opened, the first spring is released. Through the first
The link and the operating lever are returned in the locking direction.

On the other hand, the rod member is urged in the lock direction via the second spring, and when the lock member reaches the lock position, the rod is integrated with the second link under the action of the second spring. The member rotates in the locking direction.
Therefore, when the lock member is rotated, the operation lever and the first
The moment of inertia of the link does not act, and the locking operation by the locking member is performed quickly and smoothly.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a schematic perspective explanatory view of a vehicle body 12 provided with a lock device 10 according to an embodiment of the present invention.

A front seat 16 and a rear seat 18 are arranged in the vehicle interior 14 of the vehicle body 12 in the vehicle length direction (direction of arrow A). As shown in FIGS. 1 and 2, the front seat 16 provided on the passenger side is a front seat cushion 20 for seating that is slidable in the vehicle length direction (direction of arrow A).
And at least a front seat back 22 for a backrest that can be tilted backward, and a detachable headrest 24 above the front seat back 22, and the locking device 10 according to the present embodiment is attached to the front seat 16. To be done.

As shown in FIGS. 3 and 4, the lock device 10 includes a fixed rail member 28 fixed to the floor surface 26 of the vehicle body 12 and a movable rail member fixed to the lower surface of the front seat cushion 20. 30 and the movable side rail member 3
0 and the fixed side rail member 28 are integrally fixed to prevent the front seat 16 from moving.
And a rod member 34 to which the lock member 32 is fixed
And an operation lever 36 for rotating the rod member 34, and the lock member 32 is rotated in the unlock direction (direction of arrow D) via the operation lever 36, while the lock member 32 is rotated. The operation lever 36 is provided with a link mechanism 38 for individually rotating in the lock direction (arrow B direction).

As shown in FIG. 3, the fixed rail member 28 has an engaging surface 39 extending in the direction of arrow A. The engaging surface 39 extends from the most distal lock position P to the vehicle length. A plurality of lock member locking lock holes 40 are formed at predetermined intervals in the rear direction (arrow A2 direction).

The rod member 34 is rotatably supported along the movable rail member 30, and the lock member 32 is fixed to one end of the rod member 34. The lock member 32 is provided with a plurality of lock teeth 44 which are inserted through the windows 42 of the movable side rail member 30 into arbitrary lock holes 40 formed in the fixed side rail member 28. The lock member 32 is constantly urged in the lock direction (arrow B direction) via the pair of second springs 46.

The link mechanism 38, as shown in FIGS. 3 and 4, has a first link 48 connected to the operating lever 36.
A second link 50 connected to the rod member 34, and first and second biasing the first and second links 48, 50 in the locking direction of the locking member 32 (arrow E direction and arrow F direction). A rod-shaped link that engages the springs 52 and 46 and one end with the first link 48, and has the other end inserted into the elongated hole 54 of the second link 50 and engageable with one inner wall of the elongated hole 54. (Third link) 56. The first link 48 is swingably attached to a support shaft 58 arranged in parallel with the rod member 34 via a first spring 52.

As shown in FIG. 4, a reclining device 60 is mounted on the front seat cushion 20 and the front seat back 22. The reclining device 60 includes a reclining knob 62 arranged on a side portion of the front seat cushion 20. A reclining adjuster 64 for adjusting the front seat back 22 to a predetermined tilted posture by operating the reclining knob 62 is attached to the front seat cushion 20 and the front seat back 22.

As shown in FIGS. 1 and 2, the rear seat 18 includes a rear seat cushion 66 for seating, rear seat backs 68a and 68b for backrests, and upper parts of the rear seat backs 68a and 68b. Detachable headrests 70a and 70b are provided. Rear seat back 68a,
The 68b is configured so that it can recline as required.

The operation of the lock device 10 according to this embodiment having the above structure will be described below.

First, in FIG. 2, after the headrest 24 constituting the front seat 16 is removed from the upper portion of the front seat back 22, the front seat cushion 20 is moved forward in the vehicle length direction (direction of arrow A1). It Specifically, as shown in FIG. 3, when the operation lever 36 is swung in the direction of arrow G, the first link 48 swings upward with the support shaft 58 as a fulcrum against the first spring 52. The second link 50 swings upward against the second spring 46 via the rod-shaped link 56. Therefore, the lock member 32 swings in the unlock direction (arrow D direction) integrally with the rod member 34 to which the second link 50 is fixed, and the lock tooth 44 is disengaged from the lock hole 40 of the fixed side rail member 28. To be done.

In this state, when the front seat cushion 20 is moved in the direction of arrow A1, the lock member 32 moves further from the most advanced lock position P in the direction of arrow A1 and the engaging surface 39 of the fixed side rail member 28. It is arranged corresponding to.
Therefore, when the holding action of the operating lever 36 is released, the operating lever 36 swings integrally with the first link 48 in the direction of arrow E via the elastic force of the first spring 52, and is held in a horizontal posture. To be done. On the other hand, the second link 50 is maintained in the unlocked posture, and the end portion of the rod-shaped link 56 moves in the elongated hole 54 of the second link 50 (see FIG. 7).

In this state, the reclining knob 62 constituting the reclining device 60 is operated, and the front seat back 22 is tilted rearward via the reclining adjuster 64. Then, as shown in FIG. 5, the front seat back 22 is supported at a position where it abuts on the front end portion of the rear seat cushion 66 and is substantially flush with the upper surface of the rear seat cushion 66. It The rear seat back 68a can be reclined rearward if necessary.

As a result, the front seat cushion 20,
Front seat back 22 and rear seat cushion 66
Across the same plane. So, for example,
A wide flat surface for a loading platform can be obtained, and a relatively large load can be effectively loaded.

Next, when the front seat 16 is returned from the flat structure shown in FIG. 5 to the sitting posture shown in FIG. 2, first, the reclining device 60 is operated to move the front seat back 22 upward. Rock. When the front seat cushion 20 is moved in the direction of the arrow A2, when the lock teeth 44 of the lock member 32 reach the most advanced lock position P from the engagement surface 39, the lock teeth 44 are pulled by the second spring 46. Is inserted into the lock hole 40 (see FIG. 6).

In this case, in this embodiment, the rod member 3
The second link 50 is only attached to the No. 4, and the second link 50, the first link 48, and the operation lever 36.
And are individually rotatable with respect to the lock direction of the lock member 32 (direction of arrow B). Therefore, when the lock member 32 rotates in the lock direction, the moment of inertia of the first link 48 and the operating lever 36 does not act, and the lock member 32 quickly and smoothly rotates in the lock direction to lock the lock member 32. The teeth 44 are securely inserted into the desired locking holes 40.

Therefore, even when the front seat cushion 20 is slid in the direction of arrow A2 at high speed, the lock member 32 does not jump over the desired lock hole 40, and the operability of the front seat 16 is improved. Therefore, it is possible to reliably fix the front seat 16 at a desired lock position. In particular, even when the position of the front seat cushion 20 is high and the operating lever 36 is considerably separated from the rod member 34 upward, the moment of inertia at the time of locking can be greatly reduced.
The advantage is that the lock speed is improved.

Moreover, since the lock teeth 44 of the lock member 32 and the boundary portion of the lock hole 40 of the fixed side rail member 28 do not come into contact with each other due to "lock tooth jumping", damage to the lock device 10 is effectively prevented. It becomes possible to do.

[0030]

As described above, in the vehicle seat locking device according to the present invention, the rod member for rotating the locking member and the operating lever are connected via the link mechanism. While rotating the lock member in the unlock direction via the lock lever, the lock member is rotatable in the lock direction separately from the operation lever. Therefore, when the lock member reaches the most advanced lock position, the lock member and the rod member rotate integrally in the lock direction,
It is possible to quickly and smoothly perform the locking operation while avoiding the influence of the moment of inertia due to the operation lever.

[Brief description of drawings]

FIG. 1 is a schematic perspective explanatory view of a vehicle body in which a lock device according to an embodiment of the present invention is incorporated.

FIG. 2 is a side view of a seat to which the lock device is applied.

FIG. 3 is a perspective explanatory view of the lock device.

FIG. 4 is a partial perspective view illustrating a seat on which the lock device is mounted.

FIG. 5 is a side view for explaining a state in which the sheet is flat.

FIG. 6 is a front explanatory view of the lock device.

FIG. 7 is an operation explanatory view of the lock device.

FIG. 8 is an explanatory diagram when making a conventional sheet into a full flat shape.

FIG. 9 is an explanatory view of a state in which the conventional seat is further movable forward.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 10 ... Lock device 12 ... Car body 16 ... Front seat 18 ... Rear seat 20 ... Front seat cushion 22 ... Front seat back 28 ... Fixed side rail member 30 ... Movable side rail member 32 ... Lock member 34 ... Rod member 36 ... Operating lever 38 ... Link mechanism 44 ... Lock teeth 46, 52 ... Spring 54 ... Long hole 56 ... Bar link 60 ... Recliner

─────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-4-215534 (JP, A) Actual Opening 2-24730 (JP, U) Actual Opening Sho 59-89732 (JP, U) Actual Opening Sho 59- 120635 (JP, U) (58) Fields surveyed (Int.Cl. ⁷ , DB name) B60N 2/00-2/72

Claims (2)

(57) [Claims] 1. A vehicle seat locking device for fixing a seat, which advances and retracts in a vehicle length direction and is slidable forward from a most advanced lock position, to an arbitrary position behind the most advanced lock position, the vehicle seat locking device comprising Fixed rail member mounted on the side, movable rail member mounted on the seat side, and for fixing the movable rail member and the fixed rail member integrally to prevent movement of the seat Lock member, a rod member for rotating the lock member, an operation lever for rotating the rod member, and one for rotating the lock member in the unlock direction via the operation lever. A link mechanism for rotating the lock member in the lock direction separately from the operation lever, and a vehicle seat lock device. 2. The lock device according to claim 1, wherein the link mechanism includes a first link connected to the operation lever, a second link connected to the rod member, and the first and second links. A first and a second spring for urging the lock member in the locking direction of the lock member; A vehicle seat locking device, comprising: a third link engageable with one inner wall portion of the hole.