JPH09315190A - Walk-in sheet slide device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To securely move a latch to a removal position so as to enable the accurate walk-in operation by providing an upper rail with a restricting part for restricting the movement of a walk-in lever in the direction for separating from the upper rail, and restricting the floating of the walk-in lever with the simple structure. SOLUTION: When a backrest is inclined forward, a walk-in lever 10 is turned through a cable 14, and a latch 7 is pushed to an abutment part 10b of the walk-in lever 10 so as to be turned in the removing direction, and slide of an upper rail 5 is enabled, and the forward movement of a seat is enabled. At this stage, the cable 14 is stretched with the forward inclining operation of the backrest, and on the way of the turning of the walk-in lever 10, even in the case where the force for floating the walk-in lever 10 from the upper rail 5 is applied to the walk-in lever 10, a restricting part 12 of a bracket 9 abuts on a part near an abutment part 10b so as to prevent the floating of the walk-in lever 10, and the latch 7 can be turned to a normal removal position.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a walk-in seat slide device having a so-called walk-in function that allows a seat to move forward in association with a forward leaning motion of a backrest of the seat.

[0002]

2. Description of the Related Art As shown in FIGS. 5 to 8, a conventional walk-in seat slide device includes a lower rail (101) fixed to a floor and an upper rail (10) fixed to a seat.
2) is slidably fitted to the upper rail (102).
A latch (103) that can be engaged and disengaged is pivotally attached to a lock hole (101a) formed in the lower rail (101) by a rod (104), and is connected to a backrest of a seat via a cable (105). The walk-in lever (106) that disengages the latch (103) from the lock hole (101a) interlocks with the forward tilting motion of the leaning shaft.
It is pivotally attached with (107).

When the seat back is tilted forward, the cable
The walk-in lever (106) rotates via (105), and the contact part of the walk-in lever (106)
(106a) contacts the latch (103) and the contacted portion (103a), and the latch (103) and the rod (104) rotate in the detaching direction. rod
Along with the rotation of (104), the latch of the other seat slide device (not shown) rotates in the detaching direction via the cable (108) connected to the rod (104) integrated with the latch (103). Then, the seat can be moved to the foremost position, and it is possible to easily get on and off the back seat.

[0004]

However, in the conventional walk-in seat slide device, the shaft (107) is pulled when the cable (105) is pulled due to the forward tilting motion of the backrest.
The contact part (106a) of the walk-in lever (106) that contacts the contacted part (103a) of the latch (103) by the rattling of parts and the elastic deformation of the walk-in lever (106) is shown in FIG. Along the inclination of the contacted portion (103a) of the latch (103), there is a possibility of moving from the normal position (A) shown by the solid line in FIG. 8 to the floating position (B) shown by the chain double-dashed line.

When such movement occurs, the rod (104)
(L) from the center of the to the contacted part (103a) of the latch (103) with which the contact part (106a) of the walk-in lever (106) contacts
However, it becomes longer than the original distance, and the rotation angle of the latch (103) with respect to the amount of pull of the cable (105) becomes smaller,
There is a risk that the walk-in lever (106) may not be able to reliably rotate the latch (103) to the disengaged position, causing a malfunction.

In view of the above-mentioned problems of the prior art, the present invention prevents the walk-in lever from being lifted with a simple structure to reliably move the latch to the disengaged position for a reliable walk-in operation. It is an object of the present invention to provide a walk-in seat slide device made possible.

[0007]

According to the present invention, there is provided the above-mentioned object of slidably fitting an upper rail fixed to a seat to a lower rail fixed to a floor, and
A latch that engages with the lower rail and fixes the seat at an arbitrary position on the upper rail, and is linked to the backrest of the seat, and abuts the abutted portion of the latch in conjunction with the forward tilting motion of the backrest. In a walk-in seat slide device pivotally connected with a walk-in lever that interlocks a latch in a disengagement direction, it is produced by providing an upper rail with a restraining portion that restrains the walk-in lever from moving in a direction away from the upper rail. .

[0008]

Embodiments of the present invention will be described with reference to the drawings. 1 and 2 show a first embodiment of the present invention, in which (1) and (2) are mounted between a floor of a vehicle body and a seat, and are left and right for supporting the seat movably back and forth. It is a seat slide device. Left and right seat slide device (1)
(2) is the left and right lower rails (3) fixed to the floor
(4) and left and right lower rails (3) fixed to the seat side
It is composed of left and right upper rails (5) and (6) slidably fitted in (4). Since the configuration related to the present invention is implemented on the side of the one seat slide device (1), the following description will be made of the one seat slide device (1).
Only will be described in detail.

The lower rail (3) is attached to the upper rail (5).
Latches (7) that can be selectively engaged and disengaged are pivotally attached to a plurality of lock holes (not shown) formed along the longitudinal direction on the side surface of the. This latch (7) is fixed to a bracket (9) fixed to a horizontal base plate (5a) of the upper rail (5), and to a rod (8) pivotally supported so that its axial direction faces forward and backward. By engaging with an arbitrary lock hole, the forward and backward movement of the upper rail (5) can be restrained and the seat can be fixed at a desired position. The latch (7) is constantly urged by a spring (not shown) in a direction to engage with the lock hole.

The rod (8) has a handle portion (8a) as an operating portion at the front end, and a lever (8b) is fixed at approximately the center in the axial direction. The lever (8b) connects the cable (1) to the rod (2b) to which the latch (2a) of the other seat slide device (2) is fixed.
It is connected via 3).

By rotating the rod (8) in the direction of the arrow by operating the handle portion (8a), a seat slide device is obtained.
While the latch (7) of (1) is disengaged from the lock hole, the latch (2a) of the other seat slide device (2) is also connected to the cable (1).
The seat can be moved to any position by interlocking via 3), disengaging from the lock hole, and freely moving the upper rails (5) and (6) back and forth.

A walk-in lever (10) and an operating lever (11) are mounted on the bracket (9) on the upper rail (5) side.
(16) and (17) are pivotally attached to each other.
The walk-in lever (10) includes a connecting portion (10a) having the other end of a cable (14) having one end connected to a backrest of a tiltable seat, and an abutted portion of a latch (7) ( 7a) has an abutting portion (10b) capable of abutting and a deformed hole (10c), and the cable (14) is rotated by pulling the cable (14) by the forward tilting motion of the backrest, so that the abutting portion ( 10b) contacts the contacted portion (7a) of the latch (7) and can push the latch (7) in the detaching direction.

The actuating lever (11) is a walk-in lever (1
When the pin (11a) is fitted into the odd-shaped hole (10c) of (0) and the walk-in lever (10) walks in, the bent portion (10c) of the odd-shaped hole (10c) is urged by the urging force of the spring (15). The pin (11a) is engaged with 10d) to restrain the walk-in lever (10) in the walk-in operation state.

The bracket (9) includes a walk-in lever.
A restraining portion (12) for preventing the edge of (10) from rising from the upper rail (5) is formed. This deterrent
In (12), the portion covering the upper surface of the walk-in lever (10) is bent and formed along the upper surface of the walk-in lever (10),
The walk-in lever (10) is prevented from rising near the contact portion (10b), and the distance between the rotation center of the latch (7) (center of the rod 8) and the contacted portion (7a) is changed. It is possible to prevent the rotation angle of the latch (7) from becoming small during the walk-in operation.

When the backrest leans forward, the walk-in lever (10) is rotated via the cable (14) to move the latch (7).
Is pushed by the contact portion (10b) of the walk-in lever (10) to rotate in the detaching direction, and the other latch (2a) also rotates in the detaching direction via the cable (13). The upper rails (5) and (6) can be slid, and the seat can be moved forward. The walk-in lever (10) is held in the walk-in state by the pin (11a) of the actuating lever (11) engaging with the bent portion (10d).

In this embodiment, when the walk-in is activated, the cable (14) is pulled in conjunction with the forward tilting of the backrest, and the walk-in lever (10) is rotated while the walk-in lever is being turned on. Even if a force to lift the lever (10) from the upper rail (5) is applied, the restraining portion (12) comes into contact with the contact portion (10b) and the walk-in lever (10).
Since the lifting of the latch (7) is suppressed, it is possible to prevent the above-described decrease in the rotation angle of the latch (7) due to the lifting and the possibility that the latch (7) cannot be disengaged from the lock hole. it can. That is, by preventing the above-mentioned lifting, the latch (7) can be reliably rotated to the regular disengagement position, and the latch (2a) of the other seat slide device (2) is surely disengaged. It can be rotated and a reliable walk-in operation becomes possible.

When the seat reaches the substantially central position in the course of returning the seat moved to the foremost position rearward by the walk-in operation, the end portion (11b) of the actuating lever (11) is fixed to the lower rail (3). Front edge (18) of the
a) and the pin (11a) of the actuating lever (11) is deformed (10c)
Remove from the bent part (10d) of the walk-in lever (10)
Is released, the latches (2a) and (7) are engaged with the lock holes, and the seat is fixed at a substantially intermediate position.

FIG. 3 shows a second embodiment of the present invention. In this embodiment, the bracket (9) has a walk-in lever (1
A small piece restraining portion (12a) that covers the upper surface of the connecting portion (10a) of (0) and prevents the floating of the connecting portion (10a) side is cut and formed.

By suppressing the lifting of the walk-in lever (10) on the side of the connecting portion (10a) by means of this restraining portion (12a), the contacted portion of the latch (7) is the same as in the first embodiment. The contact position relationship between the contact part (10b) of the walk-in lever (10) and (7a) can be maintained in a desired state, and the latch (7) can be reliably rotated to the disengaged position.

FIG. 4 shows a third embodiment of the present invention. In this embodiment, the restraining portion (1
2b) and on the walk-in lever (10)
A notch (10e) opening toward (12b) is formed.
When the walk-in is activated, the notch (10e) is the restraint (12b)
By engaging with, the lifting of the contact portion (10b) of the walk-in lever (10) is suppressed.

In this embodiment, since the notch portion (10e) engages with the restraining portion (12b) in the vertical direction, it is possible to suppress the movement of the contact portion (10b) in both the upper and lower directions, and more reliably. Can be held in a regular position.

[0022]

According to the present invention, since the upper rail is provided with the restraining portion for restraining the walk-in lever from moving away from the upper rail, the abutting portion of the walk-in lever is always in the initial setting state. As it is, it can abut against the abutted portion of the latch, and the latch can be reliably rotated to the regular disengagement position, and a reliable walk-in operation can be obtained.

In other words, it is possible to solve the problem that the range of rotation of the latch due to the lift of the walk-in lever is reduced, and the latch cannot be disengaged.

[Brief description of drawings]

FIG. 1 is an overall perspective view of a seat slide device according to a first embodiment of the present invention.

FIG. 2 is a perspective view of the same main portion.

FIG. 3 is a perspective view of a main part of a second embodiment of the present invention.

FIG. 4 is a perspective view of an essential part of a third embodiment of the present invention.

FIG. 5 is a perspective view of a main part of a conventional device.

FIG. 6 is a view on arrow VI in FIG.

7 is a vertical cross section taken along line VII-VII in FIG.

FIG. 8 is a vertical sectional view of a portion taken along the same line as FIG. 7 when the walk-in is activated.

[Explanation of symbols] (1) (2) Seat slide device (3) (4) Lower rail (5) (6) Upper rail (7) Latch (7a) Abutted part (8) Rod (8b) Lever (9 ) Bracket (10) Walk-in lever (10a) Connection (10b) Abutment (10e) Notch (12) (12a) (12b) Restraint (13) Cable (14) Cable

Claims (1)

[Claims] 1. A latch for slidably fitting an upper rail fixed to a seat to a lower rail fixed to a floor, and a latch for engaging the lower rail with the upper rail to fix the seat at an arbitrary position. , A walk-in seat slide device that is linked to a backrest of a seat and pivotally connects a walk-in lever that interlocks with a contacted portion of a latch and interlocks the latch in a detaching direction in association with a forward tilting motion of the backrest. In the walk-in seat slide device, the upper rail is provided with a restraining portion that restrains the walk-in lever from moving away from the upper rail.