JPS62199543A - Lock device in vehicle seat - Google Patents

Abstract

PURPOSE:To enable smooth boarding and alighting onto and from a rear seat, by advancing a seat cushion to lock an auxiliary lock section after a main lock section is unlocked by tilting a seat back, so that the seat cushion is locked at a frontmost position. CONSTITUTION:When a seat cushion Sc is located at a normal seating position while a seat back Sb is located at a neutral position, a lock member 4 is engaged in a locking hole 6a in the lower rail 5 side so that the seat cushion Sc is locked in such a condition it is impossible to slide in the longitudinal direction. Further, when the seat back Sb is inclined forward by manipulating a walk-in lever 1, a rod 8 is pulled rearward so that a link member 7 is rotated to press the upper part 4b of the lock member 4, and the engaging part 4b is rotated so that the engaging part 4a is pulled out from the locking hole 6a and is unlocked. Thereafter, when the seat cushion Sc is advanced, an auxiliary lock part 10 is engaged with an engaging piece 12 and is locked.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a locking device for a vehicle seat, particularly a seat equipped with a walk-in mechanism.

[Conventional technology]

Vehicle seats, especially the front seats of two-door cars,
A walk-in seat has been implemented in which passengers can enter and exit the rear seats by sliding the seat cushion forward with the TonoSec tilted forward. An example of the conventional walk-in seat will be described with reference to FIGS. When 1) is operated, the seat cushion SB is tilted forward, and when the seat back SB is tilted forward by this lever (1), the seat cushion Sc is unlocked and slid forward, resulting in a walk-in state. In this state, passengers can get in and out of the rear seats.

10 and 11 show a locking device for this walk-in seat. A bracket (3) is fixed to the upper rail (2) (111 part) of the slide rail to which the seat cushion Sc is fixed. (3), a lock member (4) is pivotally supported by its solid shaft support so as to be rotatable in the inward and outward directions, and the lower end of this lock member (4) is bent into an L-shape to form an engaging portion ( On the other hand, the lower rail (5) fixed to the floor side has a locking hole (6a) formed in the front and rear direction corresponding to the locking member (4). A stop plate body (6) is fixed, and a lock member (
The engaging portion (4a) of 4) is installed inside the shaft support and is engaged by the biasing force of nine springs (not shown).

Moreover, the upper part (4b) of this locking member (4) is
An L-shaped link member (one end (7a) of the force is abuttingly engaged with the upper surface of the rail (2), and the other end (7b) of this link member (7) is Although not shown, the rod (
The link (7) is connected to the hinge part of the seat back SB through the link (7).
) is rotated so that the lock member (4) is removed from the locking hole (6a). That is, in the normal state where the seat pack SB is in the neutral position (Fig. 9A), the locking member (4) is engaged with the locking hole (4a) and the seat pack = +:y Sc is on the floor side. On the other hand, it is in a locked state where it cannot be slid forward or backward, and from this state, the walk-in reno (1) installed on the side of the G-Tonosec SB.
When the seat back sb is tilted forward by operating the seat back sb (FIG. 9B), the seat back sb and the rod (8) are brought into engagement at the rotational position where the seat back sb is approximately upright. Therefore, the rod (8) is pulled rearward. When the rod (8) is pulled in this way, the link member (force is rotated and its one end (7a) presses the upper part (4b) of the lock member (4), and thereby the lock member (4) is rotated so that the engaging portion (4a) is removed from the locking hole (6a), and the lock is released.

When the lock is released in this way, the seat cushion S
C upper rail (2),! :Lower rail (5)
It is slid forward by the biasing force of a return spring (not shown) provided between the seats and is positioned at the frontmost position (Fig. 9C), that is, it is in a walk-in state, and in this state, passengers cannot enter or exit the rear seat. will be held.

Moreover, by tilting the seat pack sb backward from this walk-in state, it can be set to a so-called full flat state.

[Problem that the invention seeks to solve]

However, in this conventional walk-in seat, when it is in the walk-in state, that is, when it has been moved to the frontmost position, it is in an unlocked state in which the locking member (4) is removed from the locking hole (6a). If you pull it with your hand or get it caught, it may move unnecessarily and interfere with getting on and off.
When the Tonosec SB is set to the fully flat state by tilting it backwards, the force that presses the seatback SB backward causes the seat cushion Sc to move significantly backwards (Fig. 9D). Therefore, the seat pack SB is in the collapsed state. In this case, the upper end of the seat cushion ySc2 of the rear seat comes into contact with the front end of the seat cushion ySc2 (FIG. 9E), resulting in the inconvenience that the seat cushion sb cannot be reliably set in a fully flat state.

The present invention has been made in view of this problem, and aims to solve the above-mentioned problems by making it possible to lock the seat cushion in the walk-in state with a simple structure.

[Means for solving problems]

In order to achieve the above-mentioned object, the present invention includes a slide rail that is pivotally supported on the upper rail side so as to be engaged with one of the locking holes provided on the lower rail side.
A locking member that is disengaged from the locking hole in conjunction with forward tilting of the jet knob, and a portion of the locking member that engages with the locking hole is provided on opposite sides of the shaft support. The seat cushion is composed of a sub-lock part and an engagement piece which is provided on the lower rail side and is engaged with the sub-lock part when the seat cushion is slid to the frontmost position and the sub-lock part is in good condition.

[Effect]

The measures described above operate as follows.

When the seat cushion is moved forward with the locking member and the locking hole unlocked by tilting the seat z-tuck forward, the secondary locking part engages with the engagement piece, and the seat cushion moves to the frontmost position. This allows the distance between the seat and the rear seat to be maintained stably, creating a walk-in condition. In this state, when the G-Tonosec is tilted backwards, its upper end will not touch the seat cushion of the rear seat, and it can be reliably set to a fully flat state.

〔Example〕

Hereinafter, in a detailed explanation of the present invention with reference to FIGS. 1 to 8, parts corresponding to those of the conventional example shown in FIGS. do.

1 to 5 show a first embodiment of the present invention,
The upper part (4b) of the locking member (4), that is, the locking member (4)
) across the shaft support for the bracket (3) of the engaging part (
A sub-lock portion a1 is integrally provided on the side opposite to 4a). That is, an extension part αB from the upper part (4b) of the locking member (4) is extended forward by a required length, and its tip protrudes like a claw in the same direction as the engaging part (4a) to form a sub-lock. The sub-lock part (IQ) is formed as a part Q (I), and the sub-lock part (IQ) is inclined so that its tip can be moved up and down as the lock member (4) rotates.

In addition, a lower rail (5
) side is in a position where the sub lock part αl is engaged with the seat cushion Sc being slid to the frontmost position.
An engagement piece σ2 serving as an engagement member is provided. This engaging piece α2 is pivotally connected to the vertical face of an L-shaped bracket (13) fixed to the lower rail (5), and the vertical face of the bracket α3 corresponds to the front and rear edges of this engaging piece α2. A part of the stopper (14
a) (14b) is formed, and the engagement piece α2 is rotatable in the front and back direction within the range in which it comes into contact with the parts (14a) and (14b) of both of these two parts. A coil spring (Is) is stretched between the lower end of the piece (lz) and the front edge of the vertical surface part of the bracket (131), and the biasing force of this coil spring (Is) causes the engagement piece α2 to
is always biased in the upright direction and a part of the rear stopper (14
b) is abutted and locked.

In addition, in this example, the locking hole (
6a) is a state in which the seat cushion Sc is slid to the frontmost position, that is, the sub lock portion (111 is the engagement piece α2
The engaging part (
4a) is formed in the corresponding range. .

Next, the operation of the walk-in seat locking device of this example configured as described above will be explained.

Now, when the seat cushion Sc is in the normal seating position and the seat cushion SB is in the neutral position (same as in FIG. 9A above), the locking member (4) is inserted into the locking hole (6a) on the lower rail side. Seat cushion S
c is locked against the floor side so that it cannot slide back and forth, and in this state, the sub-lock part α [is at a height spaced upward from the upper end of the engagement piece (12) at the rear of the engagement piece (Iz). (Figure 3A).

Then, by operating the walk-in lens (1) and tilting the G-t-no-sec SB forward (same as in Fig. 9B above),
The rod (8) is pulled rearward, which causes the link member (
7) is rotated and presses the upper part (4b) of the locking member (4), thereby causing the locking member (4) to engage its engaging portion (4).
When a) is rotated so as to be removed from the locking hole (6a) and the lock is released, at tt-, the secondary lock part (IG) is tilted downward and can be engaged with the single engagement z. (Figure 3B).

When the lock by the locking member (4) is released in this way, the seat cushion Sc is slid forward by the biasing force of the return spring (not shown) (the ninth
At this time, the auxiliary lock part α [comes into contact with the engagement piece (13) from the rear, so that the engagement piece (13°) collapses forward against the biasing force of the coil spring (151). When the seat cushion Sc is further slid to the frontmost position, the auxiliary lock part a1 is moved over the engagement piece α2 (Fig. 3C), and when the seat cushion Sc is further slid to the frontmost position, is the engagement piece (completely overcome the engagement piece 17J and move the engagement piece α
2 (FIG. 4), and as a result, the seat cushion Sc&4 is locked in the forwardmost position, that is, in the walk-in state, and cannot be slid backward.

By locking the seat cushion Sc in the walk-in state in this way, the seat cushion Sc will not move unexpectedly even if a tensile force or impact is applied to the seat cushion ScK, thereby stabilizing the distance between the seat cushion Sc and the rear seat. This allows passengers to get in and out of the rear seats smoothly.

In this way, when the seat cushion Sc is locked at the frontmost position and there is sufficient distance between it and the rear seat, it is possible to reliably set the seat cushion Sc to a fully flat state by tilting it backwards. can. That is, when rotating the seat cushion sb backwards from this walk-in state to recline it, the seat cushion S
c is locked by the auxiliary lock portion, the seat cushion Sc is not moved rearward by the force of rotating the seat cushion Sc, and the seat cushion Sc is locked by the sub-locking portion.
b can be defeated (Figure 6A). In this full flat operation of the seat lock sb, the traction of the rod (8) is released as the seat lock sb rotates rearward, so that the secondary lock portion 0I gradually moves to the engagement piece α.
2, and when the G-Tonosec sb rises up to a substantially upright state, the sub lock part α0 is completely removed from the engagement piece 07J, and the engagement part (4a) of the lock member (4) is The seat cushion Sc is in a free state by coming into contact with the side surface of the engagement plate (6) of the lower rail (5), but the seat cushion Sc is in a free state when it comes into contact with the side surface of the engagement plate (6) of the lower rail (5). In the state where the seat pack SB is tilted backwards, the seat pack SB is instantaneously rotated in the direction of collapse due to its own weight without applying a large force, so the seat cushion Sc is placed at the frontmost end. It cannot be moved from its position.

In this way, the seat cushion Sc is rotated rearward without moving from the frontmost position, so that when the seat cushion Sc is folded down, its upper end touches the seat cushion SC2 of the rear seat. It will not hit and will definitely be set to a fully flat state (Fig. 6B
). By sliding the seat cushion Sc slightly rearward when the seat cushion Sc is set fully flat and in good condition, the locking member (4) is brought into contact with the engagement plate (6). ) is slid rearward and engaged with the locking hole (6a) at the frontmost end (Fig. 5).
, whereby the seat cushion Sc is locked in the fully flat state.

In addition, when returning the seat from this fully flat state to the normal use state, raise the seat back SB and perform a conventional locking operation (not shown) to pull the rod (8). Then, the lock member (4) and the locking hole (6
Release the engagement of a). In this case, the secondary lock part (1 [
has already been disengaged from the engagement piece az and positioned behind it, so even if the engagement between the lock member (4) and the locking hole (6a) is released, the secondary lock part a and the engagement piece uz will not be engaged again, so slide the seat cushion Sc to an arbitrary position and perform the lock operation, then stop the operations and engage the locking member (4) in the locking hole (6a). By adjusting the settings, you can return to normal use.

Further, FIGS. 7 and 8 show a second embodiment of the present invention, in which the engagement piece α2 of the first embodiment described above is used as an engagement member with which the sub-lock portion 00) is engaged. The top end is L instead of
A torsion bar-shaped elastic engagement body (22
1 was used. This elastic engagement body has a bracket α with its upper end inclined forward at its lower end.
J, and when the seat cushion Sc is slid to the frontmost position, the secondary lock part 00) is attached to the upper end of the elastic engagement body (22) by the same operation as in the first embodiment. This is done so that the seat cushion Sc is locked in the walk-in state.

In this way, if the elastic engaging body (2'2) is used as the engaging member, as in the first embodiment, the bracket 0 is provided with a part (2') that restricts the rotation range of the engaging member. 14a)
(14b) is not required, and the coil spring a9 for biasing the engaging member is also not required.
Compared to the first embodiment, there is an advantage that the number of parts processing steps and the number of parts can be reduced.

″In addition, in the above first and second embodiments,
7 (A locking member (4) having a sub-locking part 01 is provided on the hot side of the trail rail (2), and an engaging piece α2 and an elastic engaging body @ as an engaging member are provided on the lower rail (5) side. An example has been shown, but this can be done in the opposite mounting relationship, i.e., the locking member (4) is provided on the lower rail (5) side, and the engaging single z and elastic engaging body +221 are provided on the upper rail (2) side.
It may be configured by providing.

〔Effect of the invention〕

As described above, according to the locking device for a vehicle seat of the present invention, the seat cushion can be locked at the frontmost position, so that when getting on or off the rear seat, the seat may move unexpectedly and provide support for the movement of getting on and off. In addition, in the full-flat operation of the G-TNOSEC, the upper end of the seat pack is prevented from coming into contact with the seat cushion of the rear seat, making it possible to reliably set the seat pack to the full-flat state. has.

[Brief explanation of drawings]

FIG. 1 is a perspective view showing an embodiment of Ml of the device of the present invention, and FIG.
Figures are the same, front view, Figures 3A-C are the same, route map for explanation of operation, Figures 4 and 5 are the same, side view for explanation of operation, Figure 6
Figures A and B are explanatory diagrams of the operation of a walk-in seat to which the device of the present invention is applied, Figure 7 is a perspective view showing the @2 embodiment of the device of the present invention, Figure 8 is a front view of the same, and Figure 9 AE is an explanatory view of the operation of a conventional walk-in seat, FIG. 10 is a perspective view of a locking device in the conventional walk-in seat, and FIG. 11 is a front view of the same. In the figure, Sb hash tonotsukku, SC ha seat cushion, f21id hot rail, f41u lock member,
(4a) is an engagement portion, (5) is a lower rail, (6a) is a locking hole, 01 is a sub-lock portion, and σ2 and n are an engagement piece and an elastic engagement body as engagement members.

Claims (1)

[Claims] The slide rail is pivotally supported on one side of the upper rail or the lower rail so as to be engaged with one of a plurality of locking parts provided on the other side, and the seat back is tilted forward. a locking member that is disengaged from the locking portion in conjunction with the locking portion; and a secondary lock portion provided on opposite sides of the locking portion of the locking member with the shaft support interposed therebetween. and an engaging member provided on the rail on the side where the locking portion is provided, and with which the secondary lock portion is engaged when the seat cushion is slid to the frontmost position. Locking device on the seat.