JPH07313282A - Support structure of chair with back - Google Patents

Abstract

PURPOSE:To eliminate a feeling of fatigue in the waist, and save the space by fitting the sliding body of a chair body into the guide grooves of a pair of support bases, positioning and locking them by the engaging holes on the bottom, surfaces of the guide grooves and engaging pins, and synchronously driving a seat with a back. CONSTITUTION:A seat 1 is formed of a seat face 1a and a back part 1b, a pair of support bases 2, 2 of the seat has first guide grooves 3 parallel to a floor surface and second guide grooves 4 inclined forward from the rear end upper corner on the inner surfaces, and the first guide grooves 3 have locking engaging holes 5, 5... on the bottom surfaces. Support brackets 6, 6 on the lower surface of the seat surface 1a have sliding bodies 8, 8 having lock mechanisms interposed therein, and they are fitted to the guide grooves 3, 3. Support brackets 7, 7 have sliding bodies 9, 9 having no lock mechanism, and the sliding bodies 9, 9 are fitted to the guide grooves 4, 4. An engaging pin 11 the top end of which is protruded to and recessed from the engaging hole 5 is fitted into an axle 10.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a support structure for a chair with a backrest, and in particular, a reclining specification support that can be widely applied to seats of vehicles such as buses, trains and airplanes, as well as offices and homes. Regarding the improvement of the structure.

[0002]

BACKGROUND OF THE INVENTION Generally, a reclining seat has a structure in which a seated person releases a lock on a backrest surface which is biased by a spring and pushes it with his / her own back. The angle formed by is simply expanding.

[0003]

However, in this conventional reclining structure, even if the bottom surface of the reclining structure is slid forward, the angle between the back support part and the bottom surface is widened, so that the person sitting The burden on his lower back is increased, causing fatigue. Further, in the case of a vehicle seat, the distance from the rear seat is narrowed by the inclination of the backrest portion, and a large space is required to eliminate this, and the number of seats is reduced.

[0004]

SUMMARY OF THE INVENTION Therefore, the present invention has been made by paying attention to the actual situation and technical problems of the related art. By solving these problems, the backrest portion and the seat surface work together in synchronization. In particular, it is possible to provide a support structure for a chair with a backrest that makes it easy to operate and that can reduce the feeling of fatigue on the waist and save space when used for a vehicle seat. Has an aim.

[0005]

In order to achieve this object, a support structure for a chair with a backrest according to the present invention forms guide grooves which are symmetrical with each other on the inner surfaces of a pair of opposed supporting bases. The sliding body fixed to the chair body is fitted in the guide groove, and a plurality of engaging holes are arranged in parallel on the bottom surface of the guide groove at a predetermined pitch, and the engaging hole and the engaging pin are used for positioning. The chair can be locked, and the chair body is characterized in that the seat surface and the backrest are driven in synchronization.

[0006]

With the above-mentioned structure, the combination of the guide groove and the sliding member allows easy operation without load, and the chair body operates with it. Therefore, the seat surface and the backrest part move in synchronization. Therefore, this synchronous operation can be performed in the opposite directions by the link mechanism and when the angle between the seat surface and the backrest portion is maintained. Also,
Except in the case of the multipurpose reverse direction, the connection portion also moves, so that space can be saved.

[0007]

Embodiments of the present invention will now be described with reference to the drawings. FIG. 1 is a side view showing the outline of the case where the present invention is applied to a vehicle seat, FIG. 2 is a perspective view showing the same, FIG. 3 is a sectional front view showing a positioning lock mechanism, and FIG. FIG. 5, FIG. 5 is an isolated perspective view showing the second embodiment, FIG. 6 is a front view showing the guide groove, FIG. 7 is a side view of a mechanism portion showing the third embodiment, and FIG. 9 is a side view showing the arrangement of the guide grooves of FIG. 9, FIG. 9 is a side view showing the arrangement of the guide grooves of the fifth embodiment, and FIG. 10 is a side view showing the arrangement of the guide grooves of the sixth embodiment.

In these drawings, reference numerals 1 and 1 denote seats, and the seat 1 is supported by a pair of opposing support bases 2 and 2 via a reclining mechanism which will be described later. It is fixed on the floor,
The seat 1 described above includes a seat surface 1a and a back support portion 1b.

A first guide groove 3 which is substantially parallel to the floor surface is formed on the inner surface (opposing surface) of the support bases 2 and 2 in front of the upper edge of the support bases 2, and from the rear end upper corner to the front. A second guide groove 4 that inclines to is formed, and the first and second guide grooves 3 and 4 are both endless.

Further, on the bottom surface of the above-mentioned first guide groove 3, there is provided a locking lock for seat 1, which will be described later, so that engagement holes 5, 5 ... Has been done.

On the lower surface of the seat surface 1a of the seat 1, there are support brackets 6, 6 near the central edge and the rear end edge, respectively.
7, 7 are attached, and the support brackets 6, 6 are provided with free-rotating sliding bodies 8 and 8 with a locking mechanism interposed. The sliding bodies 8 and 8 are guided to the first guide grooves 3 and 3. It is something that can be fitted. Further, the support brackets 7, 7 are provided with free-rotating sliding bodies 9, 9 having no locking mechanism, and the sliding bodies 9, 9 are fitted into the second guide grooves 4, 4.

A mechanism for positioning and locking the seat 1 with respect to the support bases 2 and 2 is shown in FIGS. A tubular axle 10 is inserted through the support bracket 6 into the center hole of the sliding body 8, and an engagement pin 11 for inserting and removing the tip into the engagement hole 5 is slidably fitted into the axle 10. Has been. A coil spring 12 is elastically provided between the other end of the engagement pin 11 and the base end surface of the axle 10, and always urges the engagement pin 11 toward the engagement hole 5 (guide groove 3).

The tip of a wire 13 is fixed to the other end of the engaging pin 11, and the wire 13 is led out from the lead-out port of the axle 11 through the central portion of the coil spring 12 to the outside. Passing through the inside of the bent pipe 15 whose one end is fixed to the support bracket 6 with the nut 14,
It is guided to below the front end of the seat surface 1a of the seat 1.

A lever mounting member 16 is fixed below the front end of the seat surface 1a, the other end of the bent pipe 15 is fixed by a nut 17, and one end of the protruding wire 13 is part of a pivot lever 18. It is fixed. The pivot lever 18 is pivotally supported by a pin 19 on the front end of the lever mounting member 16.

That is, when the pivot lever 18 is pulled toward you, the wire 13 is pulled, the coil spring 12 is compressed and the engaging pin 11 is pulled out from the engaging hole 5, and the sliding body 8 is freely moved in the guide groove 3. When the seat 1 is tilted to a desired angle and the pivot lever 18 is released, the engaging pin 11 is inserted into the corresponding engaging hole 5 while holding the position of the seat 1 again. It will be locked. The pivot levers 18 may be provided on the left and right, respectively, or the bending pipes 15 may be integrated (bifurcated) in the middle to operate the left and right locking mechanisms simultaneously.

By this action, the sliding body 8 travels back and forth in the first guide groove 3, but at the same time, the sliding body 9 travels freely in the second guide groove 4, so that the seating surface 1a and the back support portion 1b are connected. The corners move forward and backward and up and down, and the seat surface 1a also tilts without changing the angle with the back support portion 1b.

Further, in the second embodiment shown in FIGS. 5 and 6, the seat surface 20a of the chair (seat) body 20 and the back rest portion 20b.
A pair of arc-shaped guide portions 21, 21 are fixed to the outer surface of the. Engaging holes 22, 22 ... Are formed at a predetermined pitch on the bottom surface of the guide portion 21 along the groove shape.

The support base 23 for supporting the chair body 20 is of a single leg, and a support plate 25 is fixed to the upper end of the leg body 24, and the front and rear edges of the support plate 25 have sliding bodies at both ends. With shafts 27, 27 having 26, 26,
The guide portions 21, 21 are fitted to the sliding bodies 26, 26 ... The lock mechanism may be the same as that described above.

That is, in this second embodiment, the sliding body 2
6 and 26 are fixed, and the guide portions 21 and 21 slide along them. In this case, if the lever is held with the engaging pin removed from the engaging holes 22, 22 ,.
It will also function as a rocking chair.

Further, when this second embodiment is processed, FIG.
The third embodiment shown in FIG. In the third embodiment, the seat surface 20a and the back support portion 20b are completely separated, and the link plate 28 is attached to the lower side surface of the back support portion 20b with the tip protruding. On the other hand, a long hole 29 is provided on the rear side of the seat surface 1a.
Is formed, and the tip of the link plate 28 is connected to the elongated hole 29 by a loosely tightenable screw mechanism, and the screw mechanism is operated by the handle 30.

With this structure, when the handle 30 is used to loosen the connection and recline, the connecting portion has a long hole 29.
The points move along with, and it becomes possible to have a bed state as shown by an imaginary line in the figure.

Further, in the above-mentioned first embodiment, FIG.
~ Changing the shape of the support base 2 as shown in Fig. 10,
By changing the positions of the guide grooves 3 and 4, it is possible to make a product group rich in variety, and it is possible to select an optimum product according to the purpose or need.

[0023]

The support structure for a chair with a backrest according to the present invention is constructed and operates as described above. Not only the backrest but also the seating surface are synchronized, and in many cases, they move without changing the angle with the backrest, so that the load on the waist is reduced in the reclining state and the feeling of fatigue is eliminated. In other words, the weight of the human body is averaged to the back as the seat moves with the back rest. In addition, when used as a vehicle seat, it can save space due to its operating conditions, has a simple structure, no malfunctions, and is smooth to operate. Can be supplied to.

[Brief description of drawings]

FIG. 1 is a side view showing an outline when implemented for a vehicle.

FIG. 2 is an exploded perspective view.

FIG. 3 is a sectional front view showing a positioning lock mechanism.

FIG. 4 is a side view of an activation unit.

FIG. 5 is an exploded perspective view showing a second embodiment.

FIG. 6 is a front view showing a guide groove.

FIG. 7 is a side view of a mechanism portion showing a third embodiment.

FIG. 8 is a side view showing an arrangement of guide grooves as a fourth embodiment.

FIG. 9 is a side view showing an arrangement of guide grooves as a fifth embodiment.

FIG. 10 is a side view showing an arrangement of guide grooves as a sixth embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Seat 1a Seat surface 1b Back support part 2 Support base 3 First guide groove 4 Second guide groove 5 Engagement hole 6 Support bracket 7 Support bracket 8 Sliding body 9 Sliding body 10 Axle shaft 11 Engaging pin 12 Coil spring 13 Wire 15 Bent pipe 16 Lever mounting member 18 Pivot lever 20 Chair body 21 Guide part 22 Engagement hole 23 Support stand 25 Sliding body 28 Link plate 29 Long hole 30 Handle

Claims (4)

[Claims] 1. A pair of opposing support bases are formed with mutually symmetrical guide grooves, and sliding bodies fixed to a chair body are fitted into the guide grooves, and the guide grooves A plurality of engaging holes are arranged side by side at a predetermined pitch on the bottom surface, and the positioning lock can be made by the engaging holes and the engaging pins, so that the seat body and the backrest can be driven in synchronization. Characteristic chair support structure with backrest. 2. The support structure for a chair with a backrest according to claim 1, wherein the guide groove is formed separately for the backrest and the seat. 3. A back which is characterized in that the pair of guide parts are arcuate, formed between the back support part and the outer surface of the seating surface, and the sliding car body provided on the support base is fitted into the guide groove. Supporting structure for the chair with pad. 4. The support structure for a chair with a backrest according to claim 3, wherein the backrest and the seat surface are connected by a link mechanism.