JP2586963Y2 - Seat lifter structure - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a seat lifter structure in which the height of a seat is adjusted before and after the seat to tilt the seat.

[0002]

2. Description of the Related Art For example, a seat lifter that individually raises and lowers a front portion and a rear portion of a seat cushion to adjust the overall inclination angle and height of the seat is mounted on a seat of an automobile or the like.

[0003] The seat lifter is provided with, for example, a pair of front and rear links disposed apart from each other between a seat slide device and a seat cushion.
The front and rear portions of the seat can be moved up and down under rotation of each link with respect to a seat slide device serving as an attachment base.

[0004] The left and right links are respectively connected to the front and the rear by connecting rods, for example, and the driving force of the motor is increased and decreased in the seat lifting direction under the integral rotation of the connecting rod interlocked with the motor. It is configured to convert to the athletic force. The link and the connecting rod are usually fixed by welding.

[0005]

Here, if the connecting rod and the link are fixed to each other by welding, welding distortion occurs in the welded portion, particularly in the flat surface of the link. Such welding distortion distorts the contact surface of the link with the mounting base, causing a partial change in the gap between the contact surface of both the mounting base and the link, and causing the link to expand by partially expanding the gap. There is a risk of excessive rattling.

[0006] In particular, rattling of the shaft supporting portion of the connecting rod tends to spread backlash in other portions, for example, backlash between gears of the driving portion, and excessive play of the link will occur if rattling in other portions is performed. The rattling can no longer be prevented, causing abnormal noise and the like.

Further, when the contact surface of the link is distorted, the frictional resistance of the contact surface of the link to the contact surface of the mounting base also changes. The change in frictional resistance caused by welding strain, etc.
Since the rotation varies depending on the angle of the link, there is a possibility that the rotation of the connecting rod may be partially heavy, preventing smooth rotation.

An object of the present invention is to provide a seat lifter structure that prevents rattling and malfunction due to welding distortion of a link.

[0009]

According to the present invention, a damper member such as a wave washer is interposed between the mounting base and the link. The terminal of the connecting rod is rotatably and irremovably attached to the mounting base by jointly fastening the mounting base, the damper member, and the link.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

As shown in FIGS. 1 and 2, a seat lifter structure 10 according to the present invention has front and rear links 16 fixed to front and rear connecting rods 12, 14, and has a front portion. , Rear seat lifter 18, 2
0 are respectively formed.

A seat (not shown) is connected to the link 16 via front and rear legs 22, 24,
The front and rear portions of the seat can be moved up and down by the vertical movement of the legs caused by the swing of the link integrated with the connecting rods 12, 14.

The front and rear seat lifters 18, 20 are formed with a seat slide device 26 comprising, for example, an upper rail 26a and a lower rail 26b as a mounting base.
Connecting rod between left and right seat slide devices
12, 14 are erected and supported. Connecting rod
12, 14 are connected to a motor (not shown) via a drive side rack, a combination of pinions, a sector gear, a combination of pinions, and the like, and are connected to a front part and a rear part under driving of the motor. Seat lifters 18, 2
0 is ready for operation.

The constructions of the front and rear seat lifters 18, 20 and the seat slide device 26 serving as a mounting base are known in the art, and the constructions thereof are not in the spirit of the present invention. Now, neither will be described in detail.

Here, for example, the front connecting rod 12 on the driven side relative to the drive side
As shown in FIG. 2, one end of the holder bracket is fixed to the upper rail 26a of the seat slide device in advance.
Supported by 28. As can be seen from FIG. 3 in addition to FIG. 1, the connecting rod 12 is usually formed with a rivet pin 30 at the end thereof, and the rivet pin is inserted into the insertion hole 32 of the holder bracket 28, and
The rivet pin is attached to the holder bracket, that is, the seat slide device 26 serving as an attachment base by caulking the rivet pin.

By the way, as shown in FIG.
Is usually provided using a step between the connecting rod 12 and the rivet pin 30, and is fixed to the position by welding. However, if the link 16 is fixed to the connecting rod 12 under welding, welding distortion occurs on the flat surface of the link, which may undesirably deform the contact surface with the holder bracket 28.

Therefore, as can be clearly seen from FIGS. 1 and 3, in the present invention, a damper member 34 is interposed between the holder bracket 28 and the link 16, and the holder bracket is formed by caulking the rivet pin 30. The connecting rod 12 is attached to the holder bracket by jointly fastening the damper member and the link.

As the damper member 34, for example, a wave washer having a corrugated shape having elasticity can be used, and the wave washer is formed so as to sufficiently suppress the frictional resistance to the contact surfaces of the holder bracket 28 and the link 16. Such a wave washer (damper member)
34 has a function of absorbing the backlash of the connecting rod 12, that is, the rivet pin 30, that is, the connecting rod 12 in the axial direction due to the elasticity caused by its own waveform shape, such as the unevenness of the link 16 caused by welding distortion and the axial direction. I have.

That is, according to the present invention, welding distortion occurs when the link 16 is welded, and, for example, even if the gap between the link and the holder bracket 28 is partially enlarged, the welding is performed under the elasticity of the wave washer 34. Irregularities and the like generated by the distortion are sufficiently absorbed. For this reason, the rattling of the connecting rod 12 in the axial direction, that is, the rattling of the link 16 with respect to the holder bracket 28 is sufficiently suppressed, and the rattling of the other parts is not lost.
The generation of unusual noises that cause discomfort to the occupant, particularly the driver, is prevented.

The welding strain generated in the link 16 is absorbed under the elasticity of the wave washer 34, and the link and the holder bracket 28 are not brought into direct contact. The contact resistance between 28 does not fluctuate greatly. Therefore, a smooth turning operation of the link 16 with respect to the holder bracket 28 can be easily ensured, and for example, the operability of the front seat lifter 18 is reliably improved.

Further, since it is sufficient to insert the wave washer 34 on the rivet pin 30 between the link 16 and the holder bracket 28, the mounting operation of the connecting shaft 12 can be easily performed without complicating the configuration.

Here, in the embodiment, the wave washer is exemplified as the damper member 34. However, the wave washer is not limited to this as long as it is an elastic member that absorbs irregularities due to welding strain. Of the holder bracket 28, link as a damper member
16 may be interposed.

However, if the wave washer is the damper member 34, the contact resistance of the holder bracket 28 and the link 16 to the contact surface is not reduced, so that the connecting rod 12 can smoothly rotate, that is, the front seat lifter 18 can be used. Operability is surely improved.

In the embodiment, the partial structure of the front connecting rod 12 is embodied.
It is sufficient that the terminal of the connecting rod is attached to the holder bracket 28. Therefore, it goes without saying that the rear connecting rod 14 can be similarly configured if the terminal of the connecting rod is attached to the holder bracket.

Further, the connecting rod 12 is attached to the holder bracket 28 by caulking of the rivet pin 30. However, it is sufficient that the connecting rod 12 is attached to the holder bracket in a rotatable and non-removable manner. For example, the connecting rod may be attached to the holder bracket by fitting a locking member such as a pin or an E-ring.

However, the connecting rod 12 is fixed to the holder bracket by caulking the rivet pin 30.
If attached to 28, an auxiliary member such as a locking member is not required, so that an increase in the number of parts and a complicated configuration can be reliably prevented.

Incidentally, the seat lifter structure of the present invention is as follows.
Although it is most suitable for a seat of an automobile, it is not limited to this, and it goes without saying that the present invention can be applied to a seat of a train, an airplane, a ship, and the like.

The embodiment described above is for explaining the present invention, and does not limit the present invention in any way.
It goes without saying that all modifications and alterations within the technical scope of the present invention are included in the present invention.

[0029]

As described above, according to the seat lifter structure of the present invention, the damper member interposed between the mounting base and the link sufficiently absorbs irregularities and the like generated by welding distortion of the link. You. For this reason, rattling of the link with respect to the mounting base is sufficiently suppressed, and generation of abnormal noise that gives discomfort to the occupant, particularly the driver, is prevented.

Since the welding strain generated in the link is absorbed by the elasticity of the damper member and the link and the mounting base are not brought into direct contact with each other, even if welding distortion occurs, the contact between the link and the mounting base is prevented. Resistance does not fluctuate significantly. Therefore, a smooth turning operation of the link with respect to the mounting base can be easily secured, and the operability of the seat lifter is reliably improved.

Furthermore, since it is sufficient to interpose a damper member between the link and the mounting base, the mounting shaft can be easily mounted without complicating the configuration.

When the wave washer is used as a damper member, in addition to absorbing welding strain, a reduction in contact resistance of the mounting base and the contact surface of the link is sufficiently prevented, so that the operability of the seat lifter is reliably improved. Is done.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view of a seat lifter structure according to the present invention.

FIG. 2 is a partial schematic perspective view of a seat lifter.

FIG. 3 is a longitudinal sectional view of a seat lifter structure.

[Explanation of symbols]

 10 Seat lifter structure 12, 14 Front and rear connecting rods 16 Links 18, 20 Front and rear seat lifters 26 Seat slide device (mounting base) 28 Holder bracket 34 Damper member (wave washer)

Claims (2)

(57) [Scope of request for utility model registration] 1. A connecting rod is erected and supported between a pair of left and right mounting bases, and a link is fixed to each end of the connecting rod by welding, so that the connecting rod and the link are integrally rotated with respect to the mounting base. In a seat lifter structure in which the driving force from the mechanism is converted into vertical movement of the front and rear of the seat by movement, a damper member is interposed between the mounting base and the link, and the mounting base, damper member and the link are fastened together. A terminal of the connecting rod is rotatably and irremovably attached to the mounting base. 2. The seat lifter structure according to claim 1, wherein the damper member is a wave washer whose frictional resistance is sufficiently suppressed.