JP3137036U - Chair - Google Patents

Abstract

The present invention relates to a chair that can be used for a long time or is suitable for use by an elderly person or a sick person, and in particular, provides a chair that allows an elderly person or a sick person to enjoy a meal in an easy posture.
A chair according to the present invention includes a seating portion and a backrest provided at a rear portion of the seating portion, and a back support surface of the backrest forms a space between the rear end portion of the seating portion. And the angle of the downward extension line L of the backrest surface of the backrest with respect to the floor surface F is such that the rear side 100a of the buttocks 100 of the person seated on the seating section is easily positioned on the extension line. The chair is set.
[Selection] Figure 2 (c)

Description

  The present invention relates to a chair.

Usually, a chair used together with a dining table, a study desk, or the like has a seat surface on which a person sits and a backrest provided at the rear of the seat surface. Many chairs of this type have armrests on the left and right sides.
Design Registration No. 1255122

  There are various types of conventional chairs for adults, but in general, many seats are inclined at a relatively large angle so that the seating surface is long in the front and back, and the upper back is located at the rear.

  When a person is seated on such a chair, the buttocks of the person who has been seated are slid forward on the seating surface, and the trunk and pelvis tend to tilt backward.

  Since the trunk and pelvis tend to tilt backward in this way, in the case of a person with back pain, it could not be used for a long time due to the pain. On the other hand, since there is a tendency for the posture to become worse in this way, back pain may develop due to prolonged use. It is generally known that for such low back pain reduction and low back pain prevention, a posture close to a straight seat is a suitable posture that places the least burden on the waist.

  In addition, since the position of the head and neck with respect to the lower limbs and the seating surface is lowered, for example, it is not a suitable chair for an elderly care worker or a sick person to sit and eat.

  An object of the present invention is to provide a chair that easily takes an appropriate posture (a posture close to a straight seat) that does not put a burden on the waist in consideration of the problems of the conventional chair.

In order to achieve the above object, the first invention of the present invention
A seating portion and a backrest provided at a rear portion of the seating portion, and a back receiving surface of the backrest is provided above the seating portion with a space between the seating portion and a rear end portion thereof. The angle of the downward extension line of the backrest surface of the backrest with respect to the floor surface is set to an angle at which the rear side of the buttocks of the person seated on the seating portion is easily positioned on the extension line.

The second invention is
In the chair according to the first aspect of the invention, an angle between an extension line of the backrest surface of the backrest and the floor surface is set to 82 ± 1 degrees.

The third invention is
A transverse member provided on at least one of the right and left sides of the seating portion and inclined downward from the back side toward the front side;
The front end portion of the front side of the horizontal member is the chair according to the first or second aspect of the present invention, which has a height equal to or less than the height of the seating surface of the seating portion.

The fourth invention is
The transverse member is provided only on one of the left and right sides of the seating portion,
It is the chair of the 3rd present invention provided with the armrest provided above the seating part on the other of the right and left sides of the seating part.

The fifth invention is
Comprising armrests provided on at least one of the left and right sides of the seat;
The armrest has a raised portion in the middle thereof,
It is the chair of the 1st or 2nd invention which inclines below toward the back side from the said protuberance part, and inclines below toward the front side from the said protuberance part.

The sixth invention is
In the chair according to any one of the first to fifth aspects, the back support surface of the backrest is formed as a concave curved surface.

The seventh invention is
A plurality of first springs provided in parallel in the front-rear direction on the base frame of the seating portion, and a plurality of second springs provided in parallel in the left-right direction so as to cross over the plurality of first springs A chair of the present invention according to any one of the first to sixth aspects, wherein a spring material including a spring is provided, and the cushion of the seating portion is placed on the base frame.

  ADVANTAGE OF THE INVENTION According to this invention, the chair which becomes easy to become a proper posture (post posture close to a straight seat) which does not put a burden on a waist can be provided.

  Hereinafter, embodiments of the present invention will be specifically described with reference to the drawings.

(Embodiment 1)
FIG. 1 is a perspective view of a chair according to Embodiment 1 of the present invention. FIG. 2A is a plan view of the chair according to the first embodiment, and FIG. 2B is a front view of the chair according to the first embodiment. FIG.2 (c) is a right view of the chair of this Embodiment 1, and FIG.2 (d) is a left view. Moreover, FIG.2 (e) is a rear view of the chair of this Embodiment 1, FIG.2 (f) is a bottom view. As shown in FIGS. 1 and 2 (a) to 2 (f), a chair 1 includes a seat portion 5 supported by four legs 2 on the front, rear, left and right sides, and a backrest provided above the rear portion of the seat portion 5. 7, an armrest 10 provided in the left direction of the seating portion 5, and a lateral member 11 provided in the right direction of the seating portion 5.

  The pair of legs 2 on the rear side also serves as a support column that extends high and supports the backrest 7. Of the pair of front legs 2, the left leg 2 is integrally formed with the armrest 10, and extends from the armrest 10 portion to a leftward position of the rear left leg 2. The screw 40 is connected to the rear left leg 2. Further, of the pair of front legs 2, the right leg 2 is formed integrally with the lateral member 11, extends from the lateral member 11 to the right position of the rear right leg 2, and is screwed. 40 is connected to the rear right leg 2.

  Further, the front and rear legs 2 and the left and right legs 2 are connected to each other by being fixed by screws 41 to a substantially horizontal horizontally long member 8 constituting a base frame. These legs 2, members 8 and the like are made of wood, but are not limited to wood and can be made of a material having an appropriate strength such as metal or plastic.

  As shown in FIG. 2 (d), the armrest 10 is formed in a "H" shape in a side view with a raised portion 10a at the front and rear intermediate portions, so that it is easy to adjust to the elbows and the elbows can be worn even when sitting for a long time. It is hard to hurt. Further, the front end of the armrest 10 is provided with a grip 10b protruding forward by a screw 42, and a downward force can be applied by grasping this, so that a seated person can easily stand up.

  Further, the front side portion of the horizontal member 11 is inclined downward, and the front portion 11a of the horizontal member 11 is lowered below the seating surface 5a. The front portion 11a corresponds to an example of a front end portion on the front side of the present invention. Further, the lateral member 11 is formed to be curved downward and convex. In this way, if either one of the chairs is a horizontal member and is inclined so that the front side is lowered and further curved downward, it will be seated from the side of the chair when moving from the chair to the wheelchair. There is an advantage that it is easy.

  Further, the presence of the lateral member 11 can prevent the armature 10 from falling over in a direction where there is no armrest 10.

  FIG. 3 is a plan view of the base frame (base) 12 of the chair 1 according to the first embodiment. The seating portion 5 is configured by attaching a cushion 13 to a base frame (base) 12 as shown in FIG. 3 and covering it with a cloth such as vinyl leather. The base frame 12 is made of wood, and A spring material 14 is stretched inside the frame. The material is not limited to wood but may be made of a material having rigidity such as a plastic material or a metal. The spring material 14 includes a plurality of first S springs 14a provided in parallel in the front-rear direction and a plurality of second S springs 14b in the left-right direction that intersect across the plurality of first S springs 14a. Therefore, a sufficient cushioning effect is exhibited in the front and rear, right and left on the seating surface 5a. In addition, although not shown in FIG. 3, by disposing a cloth or the like between the first S spring 14a and the second S spring 14b, the sound generated by rubbing the springs when seated is reduced. Furthermore, wear due to contact between springs can be prevented.

  In addition, it is preferable to form the cushion 13 of the seating part 5 to be somewhat stiff so that the body does not sink. An example of the first spring and the second spring of the present invention corresponds to the first S spring 14a and the second S spring 14b of the present embodiment, and an S spring is used as a spring material. Further, it may be a coil spring, and may be a waving belt or the like without being limited to a spring material.

  The backrest 7 has a main body 7a made of a material having an appropriate strength, and a cushion such as urethane is wrapped around the main body 7a and further covered with vinyl leather.

  In FIG. 2, the main body 7a from which the vinyl leather and the cushion are removed is shown. This also applies to FIGS. 6 and 9 described later.

  The back support surface 17 (see FIGS. 1 and 2) of the backrest 7 is formed in a curved shape so that the front surface with which the back of the seated person contacts is concave, and the curved front surface serves as a back support portion.

  As described above, the backrest 7 is supported by the rear leg 2 which also serves as a support column. However, the downward extension line L of the left and right center line on the front side of the main body 7a of the backrest 7 is positioned on the front side. It is inclined to. As shown in FIG. 2 (c), the inclination angle (angle between the extension line L and the floor surface F) α is the rear side 100a of the person's hip 100 (see the chain line in the figure) seated on the chair 1. The angle is set at an easy angle on the extension line L and is set at 82 degrees. This angle α is preferably in the range of 82 ± 1 degrees. If the inclination angle α is larger than this, the backrest will be in a vertical state, so it will be cramped.If it is smaller than this, the trunk will be inclined too much, so people with back pain will continue to sit for a long time. In addition, it becomes difficult to take a leaning posture in a meal or the like.

  The angle β between the extension line L and the base frame 12 is set to 96 degrees, and this angle β is preferably in the range of 96 ± 1 degrees. The base frame 12 is inclined so as to become lower from the front to the rear of the chair 1. This inclination angle is 2 degrees.

  Since the backrest 7 is provided above the seating portion 5, a space 18 is formed between the backrest 7 and the seating surface 5a. The extension line L of the backrest 7 is set so as to pass up and down the rear part of the seating surface 5a.

  Further, the length of the seating portion of the chair 1 in the front-rear direction is relatively short, for example, about 380 mm to about 420 mm, and the left and right widths are also relatively narrow so that both arms of the person seated are placed on the armrests. For this reason, it is easy to maintain a correct sitting posture.

  This chair 1 has a space 18 between the backrest 7 and the seating surface 5a, and the back and forth inclination angle of the backrest is relatively small, so that the rear side 100a of the seated person's buttocks 100 can enter the back of the seating portion. it can. For this reason, it is difficult to have an unreasonable posture in which the hips are displaced forward and the knees protrude forward. In addition, since the head and neck of the person who is seated is positioned in front, it can be seated in a posture close to a straight seat with the back muscles stretched, so that an effect of reducing back pain and the like can be expected. Furthermore, it is possible to exert an effect that it is easy to take a forward leaning posture during meals or the like.

  As described above, this chair 1 can hold a seated person's body firmly and can take a natural posture with its back straight, so that it can hold a posture close to a straight seat without burdening the waist. Even if it is used for a long time, it is difficult for the back to hurt, and the back pain can be reduced. Furthermore, since it is difficult to eat with conventional chairs, elderly people such as elderly people and sick people may have a comfortable posture when using elderly chairs. It is possible to enjoy meals, increase motivation for meals, and is considered preferable for maintaining health.

  2 (a) to (f) except for the internal structure such as screws 40 and 41 and the like, the main body 7a is in the state of the backrest 7 (see FIG. 1), and is a six-side view showing the appearance of the chair 1 in FIG. Are shown in FIGS.

(Embodiment 2)
Next, the chair in Embodiment 2 concerning this invention is demonstrated. The chair according to the second embodiment has the same basic configuration as that of the first embodiment, except that a cross member 11 is provided instead of the armrest 10.

  FIG. 5 is a perspective view of the chair 20 according to the second embodiment. FIG. 6A is a plan view of the chair 20 of the second embodiment, and FIG. 6B is a front view of the chair 20. FIG. 6C is a right side view of the chair 20, and FIG. 6D is a left side view of the chair 20. FIG. 6E is a rear view of the chair 20, and FIG. 6F is a bottom view of the chair 20. 6 (a) to 6 (f) except for the internal structure such as screws 40 and 41 and the like, the main body 7a is in the state of the backrest 7 (see FIG. 5), and is a six-side view showing the appearance of the chair 20 in FIG. Is shown in FIGS.

  Unlike the first embodiment, the chair 20 of the second embodiment is provided with lateral members 11 on both the left and right sides. In this way, the lateral members 11 on both sides are formed in a downwardly convex shape and inclined forward so that the front part 11a is located at the same height as the seating surface 5a or below it. Therefore, you can sit comfortably from either the left or right side of the chair. Furthermore, by providing the transverse member 11, it is possible to prevent a person sitting on the chair from falling to the left or right.

(Embodiment 3)
Next, the chair in Embodiment 3 concerning this invention is demonstrated. The chair according to the third embodiment has the same basic configuration as that of the first embodiment, except that an armrest 10 is provided instead of the lateral member 11.

  FIG. 8 is a perspective view of the chair 30 according to the third embodiment. FIG. 9A is a plan view of the chair 30 according to the third embodiment, and FIG. 9B is a front view of the chair 30. FIG. 9C is a right side view of the chair 30, and FIG. 9D is a left side view of the chair 30. FIG. 9E is a rear view of the chair 30, and FIG. 9F is a bottom view of the chair 30.

  Unlike the first embodiment, the chair 30 according to the third embodiment is provided with armrests 10 on both the left and right sides. In this way, if the height of the armrests 10 on both sides is set to a height that is suitable for a seated person to put on the elbows, similar to the armrests on a normal chair, the body can be supported by the armrests on both the left and right sides. Therefore, it is excellent in stability.

  As described above, the chair according to the present invention can be seated so that the buttocks of the seated person are substantially located on the lower extension line of the back support surface of the backrest, and the buttocks are positioned to the back of the seating surface. Therefore, the user can sit with the back muscles extended with the head and neck positioned relatively forward. For this reason, it is easy to take a forward bending posture, and if the height of the table is appropriate, it is possible to eat with an easy posture. In addition, since this sitting posture is a posture close to a straight seat, it can be expected to reduce back pain. In addition, if the back support surface is formed as a concave curved surface, it is effective for positioning the seated person's body in the center of the chair.

  Furthermore, if armrests are provided on the left and right sides, the body can be supported by the armrests, so that the body when seated is stabilized. The armrests may be provided on both the left and right sides of the chair, but this is only provided on one side, or one of the armrests is used as a horizontal member, and the front part is about the same height as the seating surface If tilted forward, the armrest does not get in the way when sitting or leaving the chair, so the operation is easy.

  In addition, the chair in the said embodiment may be comprised so that the leg 2 integrated with the armrest 10 and the leg 2 integrated with the horizontal member 11 can be attached or detached. In this case, there are the following advantages.

  The left and right legs 2 in front of the chair 20 in the second embodiment are integrated with the respective lateral members 11, and the left and right legs 2 in front of the chair 30 in the third embodiment are integrated with the respective armrests 10. It has become. Therefore, for example, the left leg 2 (including the lateral member 11) in front of the chair 20 is replaced with the left leg 2 (including the armrest 10) in front of the chair 30 to explain in the first embodiment. The chair 1, the armrest 10 and the lateral member 11 are created so that the chair 1 is opposite to the left and right positions.

  Thus, if the front leg 2 is configured to be detachable, the chair 20 and the chair 30 can be appropriately changed to a chair shape suitable for a person to be seated, which is economical.

  The chair of the present invention has the effect of being easily placed in a proper posture that does not put a burden on the waist (post-sitting posture). For example, it is suitable for reducing back pain and preventing back pain, and for elderly people and sick people to eat. It is useful as a suitable chair.

External appearance perspective view of the chair in Embodiment 1 which concerns on this invention The top view of the chair in Embodiment 1 which concerns on this invention The front view of the chair in Embodiment 1 which concerns on this invention The right view of the chair in Embodiment 1 which concerns on this invention Left side view of the chair according to the first embodiment of the present invention. The rear view of the chair in Embodiment 1 concerning the present invention The bottom view of the chair in Embodiment 1 which concerns on this invention The top view showing the base of the seating part in Embodiment 1 which concerns on this invention The top view of the appearance of the chair in Embodiment 2 concerning the present invention Front view of the appearance of the chair according to the second embodiment of the present invention Right side view of the appearance of the chair in the second embodiment according to the present invention Left side view of the appearance of the chair in Embodiment 2 according to the present invention The rear view of the appearance of the chair in Embodiment 2 concerning the present invention Bottom view of the appearance of the chair in the second embodiment according to the present invention External appearance perspective view of the chair in Embodiment 2 which concerns on this invention The top view of the chair in Embodiment 2 which concerns on this invention Front view of the chair in the second embodiment according to the present invention The right view of the chair in Embodiment 2 which concerns on this invention Left side view of the chair in Embodiment 2 according to the present invention The rear view of the chair in Embodiment 2 concerning the present invention The bottom view of the chair in Embodiment 2 which concerns on this invention The top view of the appearance of the chair in Embodiment 2 concerning the present invention Front view of the appearance of the chair according to the second embodiment of the present invention Right side view of the appearance of the chair in the second embodiment according to the present invention Left side view of the appearance of the chair in Embodiment 2 according to the present invention The rear view of the appearance of the chair in Embodiment 2 concerning the present invention Bottom view of the appearance of the chair in the second embodiment according to the present invention External appearance perspective view of the chair in Embodiment 3 which concerns on this invention The top view of the chair in Embodiment 3 which concerns on this invention The front view of the chair in Embodiment 3 which concerns on this invention Right side view of the chair in Embodiment 3 according to the present invention Left side view of the chair in Embodiment 3 according to the present invention The rear view of the chair in Embodiment 3 concerning the present invention The bottom view of the chair in Embodiment 3 which concerns on this invention

Explanation of symbols

DESCRIPTION OF SYMBOLS 1, 20, 30 Chair 2 Leg 5 Seating part 7 Backrest 10 Armrest 12 Base frame 13 Cushion 14 Spring material 17 Back support surface 18 Space

Claims (7)

  A seating portion and a backrest provided at a rear portion of the seating portion, and a back receiving surface of the backrest is provided above the seating portion with a space between the seating portion and a rear end portion thereof. The angle of the downward extension line of the backrest surface of the backrest with respect to the floor surface is set to an angle at which the rear side of the buttocks of the person seated on the seating portion is easily positioned on the extension line.   The chair according to claim 1, wherein an angle between an extension line of the backrest surface of the backrest and a floor surface is set to 82 ± 1 degrees. A transverse member provided on at least one of the right and left sides of the seating portion and inclined downward from the back side toward the front side;
The chair according to claim 1 or 2, wherein the front end portion of the lateral member has a height equal to or less than a height of a seating surface of the seating portion. The transverse member is provided only on one of the left and right sides of the seating portion,
The chair according to claim 3, further comprising an armrest provided above the seating portion on the other of the left and right sides of the seating portion. Comprising armrests provided on at least one of the left and right sides of the seat;
The armrest has a raised portion in the middle thereof,
The chair according to claim 1, wherein the chair is inclined downward from the raised portion toward the back side and inclined downward from the raised portion toward the front side.   The chair according to any one of claims 1 to 5, wherein a back support surface of the backrest is formed as a concave curved surface.   A plurality of first springs provided in parallel in the front-rear direction on the base frame of the seating portion, and a plurality of second springs provided in parallel in the left-right direction so as to cross over the plurality of first springs The chair according to any one of claims 1 to 6, wherein a spring material including a spring is provided, and a cushion of the seating portion is placed on the base frame.

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