JPS5899912A - Chair - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a chair on which a person can sit without putting strain on the intervertebral discs.

Nowadays, it is unimaginable to live without a chair, and lower back pain is increasing noticeably as an adverse effect of chairs. In other words, although conventional chairs are excellent in terms of comfort from an ergonomic standpoint, they cannot be evaluated as being very good from an anatomical standpoint. This is because the structure is such that people naturally adopt postures that put strain on their lower back. Anatomically, this is expressed by the difference in the lumbosacral angle. When sitting on a conventional chair, the lumbosacral angle '-11 is lower than when standing as shown in Figure 1.
As the vertebrae become larger, the rounded vertebrae put pressure on the intervertebral region, which stimulates the alternative nerves, making it easier to suffer from lower back pain. Therefore, a chair with a sloping seat with a backrest and knee pads that allows you to sit without putting pressure on your vertebral discs ([1]) has been proposed, but depending on your body size, you may not be able to maintain the correct posture. I ended up having the problem of hurting my lower back.

The present invention was created with the above points in mind, and its purpose is to enable people to sit without being affected by their body size and without putting any strain on their backs. It's about providing chairs.

Hereinafter, the present invention will be explained in detail based on illustrated embodiments.

The chair frame fill is made of pipe material or the like, and has a knee pad support frame (6) erected at the front and a seat fainting frame (6) erected at the rear. The seat support frame (a seat attachment part () that slopes forward downward at an angle of 30' is formed at the top of the button).The chair body (8) includes the back and the seat part (2). are bent into a F-shape at an angle of 120' and are integrally formed with nine connected pi'''501K, and the angle between the backrest (1) and the seat (21) is 120°.This 12o0 The angle is the ideal sitting angle from an ergonomic point of view, and is highly effective in preventing back pain.The seat part f!l is made of fabric (fi) by overlaying the wooden mold and uretashi resin layer (Il) on the Fi back plate metal fitting (9). The connecting bit 01 is welded onto the back metal fitting (9).The chair body (8) is attached to the seat support frame (6).
It is attached to the seat attachment part (7) of the chair so as to be able to slide freely along the seat attachment part (7) via the sliding mechanism part (1), and the back of the chair body (8) is also attached. The illumination is vertical and the seat is parallel to the seat attachment part (7), with the front and lower part inclined downward.The knee rest support frame (6) has a knee rest (4) on the top. is attached, and this knee pad (41 is located on the extension line of the seat (2) in the forward downward direction. (7
), the sliding pipe is slidably fitted into the slot, the sliding pipe is inserted into the long hole end drilled in the seat mounting part (7) within the sliding range of the sliding pipe The rack is made up of locking pins (lη) that are fixed across the sliding pipe CI6+.
The outer periphery of the seat attachment part ( ) is made of Teflon and the sliding pipe is a sliding pipe. Then, the top of the sliding pipe IJ@ of the sliding mechanism part 04) is identified by the welded end to the back metal fitting (9) of the seat part (6). A spring locking bolt (II) is attached to a portion of the seat mounting portion (7) of the seat support frame (6) that is located at the rear of the elongated hole 0@.
is a tension spring for pulling the ``sliding'' rearward. They are fixed to the stopper bit O Sakaki and the locking bit Oη, respectively. And the tension spring
When no tensile force is applied to the sliding piping (one part is located at the rear part of the long hole O@), the chair body (8) is placed in the knee pad (
This is the most relevant stuttering from 4). Knee pad (4) is the 7th
As shown in the figure, unmolded hard and uretashi resin gardens are layered on the back metal sheet A@υ and seeded with fabric, and a recess is formed in the front part of the knee pad (4) in which the front of the knee OJ fits. It is. The back plate metal fittings of the knee pad (4) (211 is the knee pad support frame (
It is fixed to the upper part of 6) by welding O~. When sitting on a chair (A) configured as shown below, the weight of the person (P) sitting on the chair body (8) causes the seat attachment part (7) to move.
The main body of the chair (8) can be moved forward, so even if the body size of the person (p) is different, it is possible to sit on the main body of the chair (8) without having to sit in an unreasonable posture. As a result, as shown in Figure 8 (a), the lumbosacral angle oml is not larger than in the standing position, and as shown in Figure 8 (b), the intervertebral disc 0) is placed on the vertebrae. (stomach)
There is no need to feel pressured. Also, the recess μ in the knee pad (4)
The position of the knee Q9 is precisely determined by S, and the correct posture can be maintained.Furthermore, when not in use, the chair body (
8) can be pulled back, making it easy to seat.

FIG. 1θ and FIG. 11 show the other side of the sliding mechanism section 041. The seat part (2) has a locking screw inserted horizontally into the end of a long hole through an arc-shaped sliding body (both ends of lη are fixed to the sliding body) or a screw locking screw. is arranged horizontally, and the base end of a thinly wound tension spring is attached to this spring locking biscuit 01 and wound around it, and the tip of the tension spring is attached to the locking biscuit Oη. It is rare.

As described above, the present invention integrates the vertically disposed backrest and the seat section whose front and lower sides are inclined at 9 to form a chair body, and the seat section of this chair body. By attaching it to the chair frame and positioning the lower front of the seat on the extension line in multiple directions, the knee pads are fixed to the chair frame, and the chair body can be moved and adjusted freely on the extension line in the front and lower direction of the seat. By adjusting the movement of the seat along with the backrest in the direction of the knee pads, people of different body sizes can sit on the seat and backrest in a normal state and rest their knees on the knee pads. Whether a person is sitting or standing, the lumbosacral angle does not increase, which has the advantage of reliably preventing lower back pain.

[Brief explanation of the drawing]

FIGS. 1(a) and 1(b) are side views showing the conventional chair in use and the compressed state of the intervertebral disc, FIG. 2 is a perspective view of the chair of the present invention, and FIG. 3 is a side view of the same as above. Figure 4 #'i
5 is an enlarged side sectional view of portion D in FIG. 2, FIG. 6 is an enlarged view in the X direction of FIG. 2,
Figure 7 is an enlarged sectional view taken along the line CC in Figure 2, and Figures 8 (a) and (b).
) is a side view showing the state of use of the same as above and a view showing the state of the intervertebral disc, FIG. 9 is an enlarged sectional view taken along the line B-B of FIG. 2, #110
The figure is a side sectional view showing the other side of the sliding mechanism section of the present invention, No. 11.
The figure is a view in the Y direction of Figure 1θ, where (1) is the backrest, (ri is the seat, (3) is the chair frame, (4) is the knee pad, and (8) is the chair body. Representative Patent Attorney Ishi 1) Chief 7 1 Figure 2 (0) Figure 3 (b) 4p Figure 8 (0) (b)

Claims (1)

[Scope of Claims] (1) A chair body is formed by integrating a vertically disposed backrest and a seat whose front and lower sides are inclined. It is attached to the frame and positioned on the elongated line in the forward and downward direction of the seat, so that the knee pads can be moved and adjusted freely on the elongated line in 9 directions. A chair characterized by: (!Claim H No. 1*ik, characterized in that the seat portion is inclined at an angle of 120° with respect to the backrest:
Hori chair. (The chair according to claim 1, characterized in that a recess is formed in the 31II rest to accommodate the front of the knees. (4) The seat support frame of the chair frame is connected to the seat in front of the seat Claim 1, characterized in that the seat is tilted downward, the seat is slidably attached along the seat support frame, and the seat is pulled rearward by the seat support frame KG with a spring. The chair described in item 1.