JP2512785Y2 - Vehicle side support device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to a side support device for a vehicle seat.

(Prior art) As a type of side support device
As shown in FIG. 4 and FIG. 5 of the publication, the side support pads 1 forming the side support parts SS provided on both left and right sides of the seat back SB, and the bending that supports the side support pad 1 with flexibility A side support frame 2 having a surface 2a, a bracket 6 having one end fixed to the seat back frame 3 and the other end connected to a seat back spring 5 supporting the seat back pad 4, and a side support spring 7 having one end locked to the bracket 6. Is disclosed, in which the inner end of the side support frame 2 is connected to the seat back spring 5 and the outer end is connected to the other end of the side support spring 7.

With this configuration, when the side support spring 7 is displaced in the left-right direction via a link mechanism (not shown), the side support frame 2 bends in the same direction and the side support part SS is displaced in the left-right direction. As a result, the width of the seat back SB is expanded or contracted, so that the support strength of the side support can be adjusted according to the physical structure of the seated person. Further, since the side part of the seated person is supported by being bent in the curved surface 2a of the side support frame 2, a good support feeling can be obtained.

(Problems to be solved by the invention) However, in the above-mentioned conventional side support device, the side support frame 2 is assembled to the seat back frame 3 via the side support spring 7 and the seat back spring 5, so that when cornering or the like. In addition, both springs 5 and 7 are elastically deformed to easily make the seating posture unstable, and it is difficult to finely adjust the support strength by the side support portion SS.

In view of the above problems, the present invention provides a side support device for a vehicle seat, which can obtain a good support feeling, can secure a stable sitting posture during cornering, and can finely adjust the support strength. With the goal.

(Means for Solving the Problems) The present invention has a pair of side support pads that constitute side support portions provided on both left and right sides of the seat back,
A vehicle having a pair of side support frames that are flexible and that have curved surfaces that support the side support pads, and are configured to bend the frames in the left-right direction to expand or contract the width of the seat back. In a seat side support device, a pair of brackets fixed to the left and right sides of the seat back frame and a pair of brackets fixed to the seat back frame that constitutes the seat back, and the left and right sides of the seat back frame are slidably mounted in the left and right directions. A pair of slide members having screw holes opposite to each other, and a connecting rod having screw portions to be screwed into the screw holes, rotatably assembled to the seat back frame, and connecting the both slide members. To connect the inner end of each side support frame to each of the brackets, One of the outer end portion of the side support frame, characterized in that coupled to each slide member.

(Advantages and effects of the invention) According to the above configuration, when the connecting rod is rotated, both slide members slide inward or outward along the threaded portion, so the outer end portion of the side support frame connected to the slide member. Are displaced in the same direction. As a result, the side support frame bends in the left-right direction, so that the width of the seat back is expanded or contracted.

Therefore, according to the present invention, since the side portion of the seated person is supported by the curved surface of the side support frame, it is possible to obtain a good support feeling without any discomfort.

Further, since the side support frame is assembled to the seat back frame via the bracket and the slide member, and the elastic member is not interposed between the side support frame and the seat back frame, the side support portion has high rigidity. For this reason, the sitting posture during cornering is stable, and vibrations during running are less likely to be transmitted to the seated person, so that fatigue is reduced.

Furthermore, since the width of the seat back expands or contracts as the slide member slides along the threaded portion of the connecting rod, it is possible to finely adjust the support strength of the side support according to the physique of the seated person.

(Embodiment) The present invention will be described below with reference to the drawings. FIG. 1 shows a framework structure of a vehicle seat including a side support device according to an embodiment of the present invention. The frame structure includes a seat cushion frame 10 forming a seat cushion, a seat back frame 20 forming a seat back SB, and a pair of side support frames 30 forming a side support part SS.

The seat back frame 20 is made of gate-shaped pipe material,
Both lower ends are attached to the rear end of the seat cushion frame 10 so as to be rotatable in the front-rear direction. A gate-shaped wire spring 21 is attached to the seat back frame 20 via a coil spring or the like (not shown), and the wire spring 21 supports a seat back pad 22 (see FIG. 3) that constitutes a seat back SB. An S-shaped spring 23 is stretched.

As shown in the enlarged view of FIGS. 2 and 3, a pair of first brackets 31 and a pair of second brackets 32 are welded to the left and right sides of the seat back frame 20.

An engagement recess 31a is provided at the inner end of each first bracket 31. Both first brackets 31 are connected by a gusset 33 having one end welded to the first bracket 31.

An elongated hole 32a extending in the left-right direction is formed in each second bracket 32, and a slide member 35 is assembled in the second bracket 32 so as to be slidable in the left-right direction by two bolt shafts 34 penetrating the same elongated hole 32a. It is attached.

A plate 36 is welded to the outer end of each slide member 35, and a clip 37 is fixed to the tip of the plate 36. Also, the right slide member 35 has a clockwise screw hole.
35a is provided, and the left slide member 35 is provided with a counterclockwise screw hole 35a.

On the other hand, the seat back frame 20 includes the slide members.
A connecting rod 38 having a screw portion 38a screwed into the screw hole 35a of 35 is rotatably assembled, and the two sliding members 35 are connected by the rod 38. A handle 39 is integrally provided at the left end of the connecting rod 38.

The inner end of the side support frame 30 is locked in the engaging recess 31a of each first bracket 31, and the outer end of the frame 30 is locked in the clip 37.

The side support frame 30 is made of a flexible material such as soft resin or hard rubber, and has an engaging concave portion 31a and an engaging convex portion 30a for engaging the clip 37 at the inner end portion and the outer end portion, respectively. A constricted portion 30c that is formed and projects forward is formed in the middle portion. Further, a curved surface 30d that supports the side support pad 40 that constitutes the side support portion SS is formed from the engaging convex portion 30a to the constricted portion 30c. The curved surface 30d is provided with a shape similar to the body shape of the body so that it can support the body from below the scapula to the side of the pelvis. Further, a reinforcing rib 30e is formed on the back side portion of the curved surface 30d close to the constricted portion 30c.

In FIG. 3, reference numeral 41 is a seat back cover, M
Indicates a seated person.

This embodiment has the above-mentioned structure. When the handle 39 is operated to rotate the connecting rod 38 clockwise, for example, both slide members 35 slide inward along the slots 32a formed in the second bracket 32. Then, as shown by a chain double-dashed line in FIG. 3, the outer end of the side support frame 30 is displaced inward and the frame 30 is flexed inward. This causes the width of the seat back SB to shrink. Further, when the handle 39 is rotated counterclockwise, the seat back frame 30 bends outward and the width of the seat back SB is expanded.

Therefore, according to the present embodiment, the side support frame
30 is attached to the seat back frame 20 via the first bracket 31 and the second bracket 32, and no elastic member is interposed between the frame 30 and the seat back frame 20,
Moreover, since the ribs are provided on the side support frame 30 for reinforcement, the rigidity of the side support portion SS is large. for that reason,
The sitting posture during cornering is stable, and vibration is less likely to be transmitted to the occupant M during traveling, so fatigue can be suppressed.

Further, since the side support frame 30 is made of soft resin or hard rubber, and the supporting curved surface is molded into a shape similar to the body shape of the part from the bottom of the scapula to the side of the pelvis, a good support feeling is obtained. be able to.

Further, the slide member 35 is connected to the screw portion 38a of the connecting rod 38.
Since the width of the seat back SB is expanded or contracted by sliding along, the support strength by the side support parts SS can be finely adjusted according to the physique of the seated person M.

In this embodiment, the first bracket 31 and the second bracket 32 are provided separately, but if the first bracket 31 is provided with an elongated hole and the slide member 35 is attached to the same bracket 31, the first bracket can be attached to the first bracket 31. It can also be used as two brackets.

[Brief description of drawings]

FIG. 1 is a perspective view of a frame structure of a vehicle seat equipped with a side support device according to an embodiment of the present invention, FIG. 2 is an enlarged perspective view of a main part of the device, and FIG. 3 is III- of FIG. FIG. 4 is a cross-sectional view taken along line III, FIG. 4 is a cross-sectional view of a conventional side support device, and FIG. 5 is a perspective view of a side support frame constituting the same device. Explanation of symbols 20 …… Seat back frame, 30 …… Side support frame, 30d …… Curved surface, 31 …… First bracket, 32…
… Second bracket, 35 …… Slide member, 35a …… Screw hole, 38 …… Coupling rod, 38a …… Screw part, 40 …… Side support pad, SB …… Seat back, SS …… Side support part.

Claims (1)

(57) [Scope of utility model registration request] 1. A pair of side support pads constituting side support portions provided on both left and right sides of the seat back,
A vehicle having a pair of side support frames that are flexible and that have curved surfaces that support the side support pads, and are configured to bend the frames in the left-right direction to expand or contract the width of the seat back. In a seat side support device, a pair of brackets fixed to the left and right sides of the seat back frame and a pair of brackets fixed to the seat back frame that constitutes the seat back, and the left and right sides of the seat back frame are slidably mounted in the left and right directions. A pair of slide members having screw holes opposite to each other, and a connecting rod having screw portions to be screwed into the screw holes, rotatably assembled to the seat back frame, and connecting the both slide members. To connect the inner end of each side support frame to each of the brackets, One side support device for a vehicle seat which the outer end is characterized in that connected to the respective sliding member of the same side support frame.