JPH09191967A - Chair - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable a user to keep a proper sitting posture, and hardly fatigue him/her by keeping a chair size including the depth of a seat suitable for his/her body size, and setting the depth of the seat at a small value. SOLUTION: The seat 5 of a chair is divided into two portions of an upper seat 8 and a seat base 9, and the upper seat 8 is held on the seat base 9, so as to be slidable forward. In addition, a seat auxiliary piece 11 is coupled to the rear upper surface of the seat base 9 exposed upon the forward slide of the upper seat 8, and added to the back of the upper seat 8, thereby enabling the extension of the depth of the seat 5. In this case, the seat 5 is kept approximately horizontal and formed to have small depth only enough to bear a sitting person's hips.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a chair for a study desk for children and the like, a chair for office work, etc., and a chair which can be seated in a correct posture.

[0002]

2. Description of the Related Art In conventional chairs, the size of the seat is unchanged. The depth of the seat portion is set so that not only the seated person's hips but also the thighs can be placed and seated deeply.

[0003]

Among the conventional chairs described above, firstly, in the case of a chair for a study desk of a child whose body size is likely to change due to growth, the chair including the size of the seat portion is first. Cannot be made suitable for the size of the seated person's body. If the size of the chair is not appropriate for the seated person, the posture during sitting is likely to collapse, resulting in a bad posture. Therefore, in the short term, it becomes easy to get tired while sitting, and in the long term, the spine has a bad bending tendency,
You may lose your shape or cause back pain. The consequences of continuing to sit in a chair in a bad position can be said not only for children in their growing years, but also for adults who have already stopped growing in their office work chairs.

Secondly, as in a conventional chair, when the seat has a large depth, when sitting deeply, not only the buttocks of the seated person but also the thighs are pressed against the upper surface of the seat, so that the thighs It causes poor circulation and makes the seated person tired easily.
Further, if the depth of the seat portion is large, it is possible not only to sit with the waist deep but also to sit shallow. When seated shallowly, the back of the seated person is separated from the backrest having a function of supporting the back of the seated person, and the back of the seated person is easily rounded, which deteriorates the sitting posture.

The object of the present invention is to measure the size of the chair, including the depth of the seat, for chairs for study desks for children and chairs for office work that are used for a long time and for a long time. Can be adjusted to an appropriate size according to the size of the seated person's body, and by setting the seat depth small, you can maintain a correct sitting posture and make it healthy without fatigue. is there.

[0006]

In order to achieve the above object, the present invention employs the following means. (1) The seat of the chair is divided into two parts, an upper seat and a seat base, the upper seat is slidably held on the seat base, and the upper seat is slid forward. It is possible to extend the depth of the seat by inserting a seat auxiliary piece on the rear upper surface of the seat base that is sometimes exposed and adding it to the back of the upper seat.

(2) In the above item (1), the seat portion is made substantially horizontal and its depth is narrow so that only the seated person's hips can be placed thereon, and further, a substantially vertical backrest is provided.

(3) In the above item (1) or (2), a belt for holding the waist of the seated person on his back and a belt for holding both shoulders of the seated person on his back are provided. (4) In any one of the above items (1) to (3), the height of the seat can be adjusted.

(5) In any one of the above items (1) to (4), a curved surface conforming to the curve of a healthy person's spine is formed on the backrest surface of the backrest. (6) In the item (5), the height of the curved backrest surface with respect to the seat portion can be adjusted.

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION An example of an embodiment of the present invention will be described with reference to FIGS. In Figure 3, (1) is
A seated person on the chair (2), eg a growing child. (3) is a study desk. The study desk (3) can adjust its height, that is, the length of four legs (4) according to the growth of the seated person (1). Chair (2) is seat
(5) It has three main parts, a leg (6) consisting of four pieces and a backrest (7).

As shown in FIG. 3, the seat portion (5) is substantially horizontal, and its depth is narrow so that only the butt of the seated person (1) can be placed. As shown in FIGS. 1 and 2, the seat part (5) is divided into two parts, an upper seat (8) for sitting and a seat base (9) for supporting the upper seat (8) from below. The upper seat (8) is slidably held forward on the seat base (9) and can be fixed at any position by the left and right screws (10).

(11) is a seat auxiliary piece, which is an upper seat
Seat base exposed when (8) is slid forward
(9) It has a plate-like shape that is narrow in the front-rear direction and is bent downward at both left and right ends so that it can be placed on the upper rear surface, and the upper surface is flush with the upper seat (8). Fit the seat support piece (11) of the and seat it on the backrest (7) in the upper seat (8).
The seat (5) can be expanded in depth by sandwiching it with the side and adding it as a part of the seat behind the upper seat (8). However, the extension range of the depth of the seat portion (5) is set so that only the hips when the seated person (1) is an adult can be placed.

At the rear end of the seat base (9) are two rear legs.
(12) (12) and backrest (7) are attached. Upper seat
Two front legs (13) and (13) are fixed to the lower part of the front end of (8). Of course, the front legs (13) and (13) may be attached to the seat base (9) side.

The four legs (12) (12) (13) (13) are respectively
Pipe-shaped upper leg (14) and lower leg (15) that fits into it
It has a structure in which the length is adjusted by the screw (16) and fixed. Thereby, the height of the seat portion (5) can be adjusted according to the growth of the seated person (1).

Upper legs (14) (14) of the two rear legs (12) (12)
Has two columns (17) and (17) extending upwards. The backrest (7) is supported on the columns (17) and (17) almost vertically and vertically, and is adjustable. Attached by individual screws (18). The backrest (7) forms a gentle mountain-shaped curved surface on the backrest surface in accordance with the anterior depression of the back upper lumbar region caused by the S-shaped curve of the spine of a healthy person,
By adjusting the chevron upwards, it can always be adapted to the curve of the spine of a growing occupant.

On the front surface of the backrest (7), as shown in FIGS. 3 and 4, a belt for holding the waist of the seated person (1) on the backrest (7).
(19) and belts (20), (20) for holding both shoulders of the seated person (1) on the backrest (7) are provided.

Next, the operation and function of each part of the chair configured as described above will be described. Even if the seated person (1) is a child, the structure that allows the depth to be expanded without making the seat portion (5) of the chair a fixed size should be adjusted to the optimum size according to the growth process. You can

If the seat portion (5) is substantially horizontal and its depth is narrow so that only the hips of the seated person (1) can be placed,
The waist of the seated person (1) is pressed against the backrest (7).
Moreover, since the backrest (7) is almost vertical, the back of the seated person (1) is in close contact with the backrest (7), and the sitting posture is obtained by straightening the back muscles. Moreover, since the thigh is not pressed against the seat portion (5), blood circulation of the thigh is not deteriorated.

By providing belts (19), (20) and (20) that hold the waist and both shoulders of the seated person (1) to the backrest (7), the sitting posture in which the back muscles are straightened can be maintained for a long time. .

Since the height of the seat portion (5) is adjustable, when the seated person (1) is a child, the seat portion can be adjusted according to its growth.
The height of (5) can be increased so that the thighs can be made substantially horizontal, and the posture in which the upper back muscles of the upper body are stretched can be reasonably taken and fatigue can be reduced.

When a curved surface that matches the curve of the spine of a healthy person is formed on the backrest surface of the backrest (7), when the back of the seated person (1) is in close contact with the backrest surface, the seated person (1) Hold the spine of the tongue in a healthy curve to help build a healthy body shape.

If the height of the curved backrest surface with respect to the seat portion (5) can be adjusted, when the seated person (1) is a child, the curved backrest surface can be adjusted according to the growth of the child. Always fit seated person's back shape (healthy spinal curve)
Can be adjusted to

[0023]

According to the present invention, the following effects can be obtained. (1) According to the structure of claim 1, when the seated person is a child, the depth of the seat portion can be expanded to an optimum size according to the growth of the seated person, and a proper sitting posture can be obtained. Helps to build and maintain.

(2) According to the structure of claim 2, since the back of the seated person is brought into close contact with the back without leaving a substantially vertical backrest, it is difficult to curl the back, and the back is stretched and the correct posture is taken. Also, because you do not press your thighs against the seat,
It keeps the blood circulation of the thighs less likely to cause fatigue.

(3) With the structure of claim 3, claim 2
This structure helps maintain the seated posture with the back muscles stretched more securely.

(4) According to the structure of claim 4, when the seated person is a child, the height of the seated portion is increased according to the growth of the seated person so that the thigh has a substantially horizontal posture. In addition to the postures of the upper body according to the second and third aspects, it is possible to take a correct posture of the whole body and to prevent fatigue.

(5) According to the structure of claim 5, when the back of the seated person is in close contact with the backrest surface, the spine of the seated person is pressed so as to form a healthy curve, which is useful for forming a healthy body shape.

(6) According to the structure of claim 6, when the seated person is a child, the height of the curved backrest surface with respect to the seat portion is always optimized in accordance with the growth of the seated person. The effect according to claim 5 can always be obtained.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a state when a seat portion of an embodiment of the present invention is expanded.

FIG. 2 is a perspective view showing a state in which the seat of the chair is not expanded.

FIG. 3 is a side view showing the same usage state of the chair.

FIG. 4 is a perspective view showing the same use state of the chair.

[Explanation of code] (1) Seated person (2) Chair (3) Study desk (4) Desk leg (5) Seat (6) Leg (7) Backrest (8) Upper seat (9) Seat base (10) (16) (18) Screw (11) Seat auxiliary piece (12) Rear leg (13) Front leg (14) Upper leg (15) Lower leg (17) Strut (19) (20) Belt

Claims (6)

[Claims] 1. A seat is divided into two parts, an upper seat and a seat base, the upper seat is slidably held on the seat base forward, and the upper seat is slid forward. A chair characterized in that it is possible to extend the depth of the seat by fitting a seat auxiliary piece on the upper rear surface of the seat base that is exposed when the seat base is added and adding it to the back of the upper seat. 2. The chair according to claim 1, characterized in that the seat portion is substantially horizontal and has a depth that is narrow so that only a seated person's hips can be placed thereon, and that a substantially vertical backrest is provided. . 3. The chair according to claim 1, further comprising a belt for holding the seated person's waist on the backrest and a belt for holding the seated person's both shoulders on the backrest. 4. The chair according to claim 1, wherein the height of the seat is adjustable. 5. The chair according to claim 2, wherein the backrest surface of the backrest is formed with a curved surface that matches the curve of the spine of a healthy person. 6. The chair according to claim 5, wherein the height of the curved backrest surface with respect to the seat portion is adjustable.