JPS62199542A - Seat suspension lock device - Google Patents

Abstract

PURPOSE:To make it possible to dispose a lock device in a space having a width equal to the thickness of a lower or upper frame, and to aim at thinning the lock device and at enabling the seat finely to be adjusted, by providing such an arrangement that a seat suspension is locked in the horizontal direction. CONSTITUTION:When a slidable pin 30 is located at one end of an elongated guide hole 28, slidable pin 30 is engaged with the terminal end 27a1 of one end part 27 of an elongated actuating hole 27 in a lock member 25 which is therefore rotated and held in such a position that its locking teeth 25a1 is separated from engaging teeth 22 on an engaging member 22. Accordingly, the engaging member 22 is slidable in the longitudinal direction, and there is provided an X-shape link adapted to carry out normal suspension operation. Meanwhile when the slidable pin 30 is slid toward the other end part of the elongated guide hole 28 by means of a manipulating bracket 29, the slidable pin 30 continuously presses the front side and edge of an elongated actuating hole 28. Therefore, the lock member 25 is rotated in the horizontal direction about a shaft pin 22, and therefore, the locking teeth 25a1 is engaged with the engaging teeth 22a1 of the engaging member 22.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a locking device for a seat suspension provided in a vehicle seat or the like.

(Prior Art) In vehicle seats, especially truck driver seats, etc., in order to improve seating comfort by absorbing vibrations,
A seat suspension is provided between the seat and the floor to elastically support the seat. With this seat suspension, there is a risk that the seat may vibrate excessively when driving on a road, etc., which may impede the passenger's driving operation, so various models have been proposed that are equipped with a locking device that can stop the suspension function as necessary. has been done.

Conventional locking devices for this type of suspension include:
For example, there is one disclosed in ``Japanese Unexamined Patent Publication No. 57-144139.'' In other words, this suspension locking device is a seat suspension in which an upper frame to which a seat is fixed is elastically supported by an X-shaped link to a lower frame fixed to the floor side. Correspondingly, a lock piece having several locking recesses in the upper -1 direction is pivotally supported in an upright state on the lower frame side, and a The seat suspension is configured to be locked in the longitudinal direction by engaging the lock pin.

[Problem that the invention seeks to solve]

However, this conventional seat suspension locking device is configured to lock the suspension in the direction of flexure of the upper frame, so the locking mechanism is disposed in the thickness direction of the seat suspension. It is not possible to reduce the thickness of the seat suspension, and the locking recesses of the lock piece can only be formed in two or three locations, so the seat suspension can only be locked in large steps to a limited extent. Ta.

The present invention has been made in view of the above, and an object of the present invention is to provide a locking device for a seat suspension that can cope with the reduction in the thickness of the seat suspension and can be locked at an arbitrary position.

[Failure to solve the problem]

In order to achieve the above-mentioned object, the present invention provides a seat suspension device in which an upper frame to which a seat is fixed is elastically supported via an X-shaped link to a lower frame fixed to the floor side. In this, an engaging member having a plurality of engaging teeth continuous in the front-rear direction is attached to the sliding end of one link of the X-shaped link, and an engaging member is attached, for example, to the lower frame side corresponding to this engaging member. , a locking member is provided which is horizontally engaged with and disengaged from the engagement teeth of the engagement member.

[Effect]

The measures described above operate as follows.

When the locking member is separated from the engagement teeth of the engagement member, the engagement member can slide back and forth together with the X-shaped link, so that when the occupant is seated, the X-shaped link does not operate. A suspension operation is performed. Then, when the locking member is rotated horizontally and engaged with the engaging teeth of the engaging member, the engaging member is locked so that it cannot slide, and therefore the operation of the X-shaped link is stopped and the upper The 11]i position of the frame or seat is fixed.

〔Example〕

Embodiments of the present invention will now be described with reference to the drawings.

In the figure, (1) shows the entire seat suspension system, (2) shows the lower frame, and (3) shows the upper frame. The lower frame (2) is fixed to the floor side, and the upper frame (3) The seat cushion of the seat is fixed in place, and this upper room (3
) is supported by X-shaped links (4) arranged on both left and right sides of the lower frame (2) so as to be movable in the vertical direction.

Both X-shaped links (4) on the left and right sides of the drum are a pair of links (
5) and (6) with the axis (7) at its center (113)
The front ends of one link (5) of both X-shaped links (4) are connected by the front shaft (8), and the distance between the rear ends is connected by the rear shaft (9). The front ends of the other link (6) are connected by a front shaft (10), and the rear ends of the other link (6) are connected by a rear shaft (11).
) are connected to each other. These rear shafts (
Both ends of 9) and (11) are connected to the lower frame (2), respectively.
It is pivotally supported by the rear ends of both sides (2a) and (2b) of the upper frame (3) and the rear ends of both sides (3a) and (3b) of the upper frame (3), and both front shafts (8) and (10). Both ends are both sides (3a) of the upper frame (3), respectively.
(3b) and the front ends of both sides (2a) (2L)) of the lower frame (2) [
1j [On the surface U-shaped rail members (12) and (13),
The rollers (14) and (15) are fitted so as to be slidable in the front-rear direction.

In addition, a bracket (16) is fixed to the front of the front shirt l-(81) of the link (5), and this bracket ([
A coil spring (17) is inserted between the front side part (3C) of the upper frame (3) and the X-shaped link (4) due to the elastic force of this coil spring (17). , is elastically biased in the upright direction, applying a force in the upward direction to the upper frame (31 ng).

In addition, both sides (3a) of the upper frame (3) (
A rod (18) is horizontally fixed to the center of the lower frame (2), and a shock absorber (19) is installed between this rod (18) and the rear shaft (9) of the lower frame (2).

And the seat suspension configured like this +1
The 1:J-tuck device 1 (20) of the present invention is provided at the front of the lower frame (2) of 1.

(21) is a support plate on which this locking device (20) is arranged, and this support plate (21) has a front part (21a
) is bent into a U-shape and the tip is the mouth'? - It is fixed to the front surface of the front side part (2b) of the frame (2), and the lower support surface part (21b) passes below the iij side part (2C) of the lower frame (2) to the front shirt of the link (6). )
(10), and its negative end is fixed to the lower surface of the other side (2h) of the lower frame (2).

And the support surface portion (21b) of this support plate (21)
At the top, an engaging member (22) is attached to the front end side sliding portion of the other link (6) of the X-shaped link (4).

That is, a hollow pipe (23) is fitted to the front shaft (10) of the other link (6) between the links (6) on both sides in a manner that it cannot be slid in the axial direction.
An L-shaped engagement member (22) is fixed to the vertical surface thereof, and the edge of the horizontal surface of this engagement member (22) is provided with a plurality of engagement teeth (22a) continuous in the front-rear direction. is formed.

Further, this engaging member (22) has its horizontal surface portion engaged with a mouth-shaped guide member (24) fixed to the support plate (21) in the front-rear direction, and as the X-shaped link (4) moves. The support plate (21) is placed along the lever guide member (24).
) so that it can be slid back and forth without swinging on the top.

Corresponding to the engagement member (22), the front part (21a) of the support plate (21) is provided with an abbreviated locking member (
25) is rotatably supported in the horizontal direction by an axle pin (26) at its central bent portion. This locking member (25) has a negative side (25a) that passes through the lower side of the front side (2C) of the lower frame (2) and the engagement member (25).
22), lock teeth (25a1) that are continuous in the front-rear direction are formed on the side edge of this negative side portion (25a) in correspondence with the engagement teeth (22a) of the engagement member (22). .

Further, an operating elongated hole (27) is formed in the other side (25b) of the locking member (25) in its longitudinal direction. This operating elongated hole (27) has a stepped shape in its center, that is, from one end (27a) to the other end (27b).
is formed in a bent shape so that it is shifted backward, and
A terminal portion (27a1) of one end portion (27a) is formed to be slightly bent backward.

A horizontally linear guide elongated hole (28) is formed in the upper and lower surfaces of the front part (21n) of the support plate (21) in correspondence with the operating elongated hole (27) of the locking member (25). A U-shaped operation bracket (29) is arranged at the front of the support plate (21) so as to sandwich the upper and lower guide elongated holes (28). Place the sliding pin (30) between the upper and lower surfaces (support plate) (2
The long meat guide hole (28) of 1) and the operation long hole (27) of the locking member (25) are connected and pivotally supported, and the operation bracket (29) has this sliding pin (30) connected to the long guide hole. (2
8) It is designed so that it can be slid left and right within the range of movement.

Further, an elastic stopper member (31) is fixed to the back surface of the front side of the operating bracket (29) by an operating knob (32) disposed on the front side. This stopper member (31) has engaging parts (31a) (31b) formed in a cylindrical shape on both the left and right sides thereof, and the support plate (31) corresponds to the inner joint part BHa) (31b).
Four engaging parts (33a) (33b) are formed at required intervals on the front part of the front part (21a) of the operation bracket (21), and a stopper member (31) is formed at the left and right sliding ends of the operation bracket (29). ) are engaged with the four engaging parts (33a) and (33b), respectively, so that the operating bracket l-(29) is held fixed at that position.

Next, the operation of the 1-1 mechanism of the seat suspension of this example constructed as described above will be explained.

Now, when the sliding pin (30) is located at one end of the guide elongated hole (28), this sliding pin (30) is located at one end of the operating elongated hole (27) of the locking member (25). (27
a), and the lock member (25) is rotatably held in a state in which the lock teeth (25ax) are separated from the engagement teeth (22a) of the engagement member (22). There is. In this state, the operation bracket (29) has one engagement part (31a) of the stopper member (31) aligned with the support plate (21) and one engagement recess (33a).
) so that the sliding pin (JO) does not slide unnecessarily (see No. 5ilA). Therefore, the engaging member (22) is slidable in the longitudinal direction, and therefore, when an occupant is seated on the seat, the X-shaped link (4) is operated to perform normal suspension operation.

To stop the suspension operation from this state, use the operation knob (32) to operate platen 1- (29
) and slide the sliding bottle (30) into the guide slot (2).
If you slide it toward the other end of the sliding bottle (30
) moves inside the operating elongated hole (27) of the locking member (25) from one end (27a) to the other end (27b) and continuously presses the front edge of the operating elongated hole (27). Therefore, the lock member (25) is rotated horizontally about the shaft pin (26), and its lock teeth (25a1) engage with the engagement member (
22) is engaged with the engaging teeth (22a). In addition, even in this state, the operation bracket (29) is attached to the support plate 1- (
21), the other engaging part (31b) of the stopper member (31) is engaged and locked with the other engaging recess (33b), thereby preventing the sliding bottle (21) from sliding. , the locking state of the locking member (25) is maintained (see FIG. 5B). This locks the engagement member (22) so that it cannot be slid, thereby stopping the operation of the X-shaped link (4) and fixing the height position of the upper frame (3), ie, the seat.

In addition, to release the lock from this state, perform the opposite operation to the above, that is, move the sliding bottle (30) to the operating bracket (2).
When the sliding pin (30) is returned from the other end to the one end of the guide elongated hole (28) through the lock member (25)
) in the operating elongated hole (27) from the other end (27b) to the one end (27a) and continuously presses the rear edge of the operating elongated hole (27), thus locking the locking member. (25) has lock teeth (25a) of the engagement member (22).
2a), and thereby the engaging member (22) becomes slidable and the seat suspension (1) is unlocked.

In addition, in the open/unlocked state, the lock member (
The sliding pin (30) is engaged with the end portion (27az) bent further rearward from the one end (27a) of the operating elongated hole (27) of the locking member (25).
There is no play between the locking member (25) and the sliding bottle (30), so that the locking member (25) is reliably held in the unlocked state.

The seat suspension locking device of this example constructed as described above is configured such that the locking member (25) is horizontally engaged with and disengaged from the engagement member (22). Therefore, the locking device can be disposed in a small space approximately equal to the thickness of the lower frame (2), and therefore the seat suspension (1) as a whole can be made thinner.

Further, this seat suspension locking device includes an engaging member (22) in which a plurality of engagement teeth (22a) are formed, and a lock Ff1 in which a plurality of lock teeth (25ax) are formed.
Since the suspension is locked by the engagement of the 5 members (25), the seat can be fixed at a desired height in an almost stepless manner.

In the above embodiment, the engaging member (22) is attached to the sliding end of the link (6) of the X-shaped link (4), and the locking member (25) is provided on the lower frame (2) side. Although the example shown above is not limited to this, the engagement member (22) may be attached to the sliding end of the link (5), and the upper frame (3
) side may be provided with a locking member (25).

In addition, the locking/unlocking mechanism of the locking member (25) includes the operating elongated hole (27) and the sliding bottle (30) shown in this example.
It goes without saying that various configurations other than the one described above can be adopted, and that the present embodiment does not specify the present invention regarding other members, and that various deflection changes are possible.

〔Effect of the invention〕

As described above, according to the device of the present invention, since the seat suspension is configured to be locked in the horizontal direction, the locking device can be disposed in a space approximately equal to the thickness of the lower frame or the upper frame.
For this reason, it is compatible with thin seat suspensions,
In addition, the seat suspension is locked by the engagement of a plurality of consecutive teeth of the locking member and the engaging member, so the seat can be fixed at any position of the occupant in an almost stepless manner. It has various practical effects.

[Brief explanation of drawings]

FIG. 1 is a partially cutaway perspective view of a seat suspension device equipped with the device of the present invention, FIG. 2 is a section 1 to AA' line in FIG. 1, and FIG. 3 is a B-B in FIG. 1. Figure 4 is an exploded perspective view of the device of the present invention, and Figures 5A and B are explanatory views of the operation of the device of the present invention. In lXl, +21 is the lower frame, (3) is the upper frame, (4) is the X-shaped link, (22) is the engagement member,
(22a) is an engaging tooth, and (25) is a locking member.

Claims (1)

[Scope of Claims] A seat suspension device in which an upper frame to which a seat is fixed is elastically supported via an X-shaped link to a lower frame fixed to a floor side, comprising: At the sliding end of either link,
An engaging member having a plurality of engaging teeth continuous in the front-rear direction is installed, and engaging teeth of the engaging member are attached to one side of the lower frame and the upper frame corresponding to the engaging member. A locking device for a seat suspension, characterized in that a locking member that is horizontally engaged and detached from the seat suspension is provided.