KR20040009060A - chair of non-cushion type - Google Patents

Abstract

PURPOSE: A non-cushion type chair is provided to minimize the load of muscles, ligaments and discs of a lumbar region to prevent the pelvis from turning backward upon taking a seat by maintaining a smoothly curved angle of the lumbar upon taking a seat. CONSTITUTION: In the non-cushion type chair, the user's body is directly contacted to a back plate(10) and a seat plate(12). A horizontal line(HL) passing a reference point(c) set on the back part of the seat plate(12), a sloping line(SL) passing a lumbar contact point(b) set on the middle part of the seat plate(12), and a dorsal spine contact point(a) set on the upper part of the back plate(10) have an angle of 95 to 100 degrees therebetween.

Description

Non-cushion type chair

The present invention relates to a non-cushion type chair.

The non-cushion type chair is a chair which is not provided with a separate cushion member on the seat plate and the back plate, and is manufactured as a work chair, a student chair, or the like. Such non-cushion chairs require ergonomic design of the seat and back because the user's body directly contacts the seat and back and is not cushioned.

In the case of the conventional back plate, holding the lumbar spine 3 as the spine support point, the inclination angle of the back plate is formed to be 105 degrees or more, and the widthwise ends of the back plate are formed in a convex relief surface so that the left and right sides of the back are not caught on the back plate when seated. Formed into cotton. In addition, the curved surface of the back and the seat is designed without considering the position of the human body.

Therefore, the conventional non-cushion chair does not consider the anatomical form of the spine and pelvis, so that the muscles, ligaments and discs of the lumbar region are generated, and the back pain patients and the muscles are uncomfortable for the weak user. There was this.

In addition, the conventional non-cushion type chair has a problem that scoliosis may occur because both ends of the back plate are made of convex or flat surfaces.

Accordingly, the present invention has been made to solve the above problems, and an object of the present invention is to maintain the natural curvature angle of the lumbar spine when seated to minimize the load of the muscles, ligaments and discs of the lumbar spine to prevent the rear rotation of the pelvis during the seating. It is to provide a non-cushioned chair to prevent.

Another object of the present invention is to provide a non-cushioned chair that prevents the occurrence of scoliosis when sitting.

Still another object of the present invention is to provide a non-cushion type chair that maximizes the contact surface and minimizes the pressure applied to the skin surface by making the back plate and the seat plate have a curved surface suitable for the human body.

1 is a perspective view of a chair according to the present invention;

2 is a plan view of a chair according to the present invention;

3 is a cross-sectional view taken along the arrow G-G line in FIG.

4 is an inner plan view of the back plate and the seat plate of FIG. 3 extending along an inclined line and a horizontal line;

5 is a cross-sectional view taken along the arrow H-H line in FIG.

6 is a cross-sectional view taken along the arrow J-J line in FIG.

7 is a cross-sectional view taken along the arrow K-K line in FIG.

8 is a cross-sectional view taken along the line L-L in FIG. 4;

9 is a cross-sectional view taken along the line M-M in FIG. 4;

FIG. 10 is a cross-sectional view taken along the arrow line N-N in FIG. 4.

<Explanation of symbols for the main parts of the drawings>

10: back 10b, 10b ': first intaglio curved surface

10c: second negative curved surface 10d: third negative curved surface

10e: first embossed surface 12: seat

12a, 12a ': fourth negative curved surface 12b, 12b': fifth negative curved surface

12c: second embossed surface a: thoracic spine contact point

b: lumbar contact point c: reference point

d: Bottom bottom of seat plate e: Bottom bottom of seat plate

The non-cushion type chair according to the present invention is a non-cushion type chair in which a user directly touches and sits on a back plate and a seat plate, a horizontal line passing a reference point set at the back of the seat plate, and a lumbar contact point set at an intermediate part of the back plate. The angle formed by the oblique line passing through the thoracic contact point set in the upper part of the back plate is characterized in that 95 ° ~ 100 °.

The distance between the reference point and the lumbar contact point is determined by the following equation within the range of 120cm ~ 160cm.

That is, distance (cm) = 0.139 x height (mm)-8.606

In the back plate, both ends in the width direction between the lumbar contact point and the thoracic contact point are formed as a concave first intaglio curved surface.

Between the first intaglio curved surface is formed as a concave second intaglio curved surface, the width direction of the lumbar contact point is formed as a concave third intaglio curved surface, the longitudinal direction of the lumbar contact point is formed as a convex first embossed curved surface, the seat plate The widthwise both sides of the rear portion of each of the concave fourth intaglio curved surface is formed so that both ends and the center so that, the width direction both sides of the front portion of the seat plate are respectively formed in the concave fifth intaglio curved surface both ends and the center soared, the seat plate On both sides in the width direction of the front of the second convex curved surface is formed in the longitudinal direction of the seat plate.

EMBODIMENT OF THE INVENTION Hereinafter, embodiment of this invention is described in detail, referring an accompanying drawing.

1 and 2, the non-cushion type chair according to the embodiment of the present invention is formed of a single plate in which the back plate 10 and the seat plate 12 are integrally formed, and the seat plate 12 A leg 14 is installed at the lower side, and an article placing stand 16 is installed at the middle of the leg 14 to temporarily place the article.

The joints of the back plate 10 and the seat plate 12 are formed in a narrow shape, and the back plate 10 is formed with a long hole 10a so as to be easily transported by hand.

3 is a cross-sectional view taken along the arrow line G-G in FIG. As shown in the figure, a base point c is set at the back of the seat plate 12, and a bottom bottom d of the seat plate is set, and a lumbar contact point b is set at the middle of the back plate 10, and at the same time, At the top of the thoracic spine contact point (a) is set. The lumbar contact point (b) corresponds to the lumbar point 4 or 5 of the user.

An angle formed by the horizontal line HL passing through the reference point c and the inclined line SL passing through the lumbar contact point b and the thoracic contact point a is 95 ° to 100 °. The horizontal line HL preferably passes through the bottom bottom d of the seat plate and the bottom bottom e of the seat plate. This angle changes the vertebral support from the 4th or 5th lumbar spine to the top of the left and right pelvis, which prevents the pelvic rotation of the pelvis during seating and corrects the lumbar spine angle for users suffering from low back pain or weakened muscle strength. Maximize.

The rear rotation of the pelvis is a phenomenon in which the upper part of the pelvis is turned back and the lower part is turned to the front. This phenomenon occurs when most people sit in a general chair, and this condition causes low back pain when sitting for a long time.

The distance between the reference point (c) and the lumbar contact point (b) is preferably determined by the following equation within the range of 120cm ~ 160cm.

That is, distance (cm) = 0.139 x height (mm)-8.606

The above formula is based on the National Standard Position Survey, which was conducted in 1997, and is derived based on the standard position of Korean male and female 18 to 50 years old. Therefore, the distance between the reference point (c) and the lumbar contact point (b) is set according to the above formula, and the chair set with the radius of curvature of the embossed surface and the embossed surface described later on the seat plate and the back plate is more than 90% comfortable for Korean men and women. Can be used.

4 is an inner plan view of the back plate and the seat plate of FIG. 3 extending along an inclined line and a horizontal line. As shown in FIGS. 4 and 5, both ends in the width direction between the lumbar spine contact point b and the thoracic spine contact point a in the back plate 10 are formed as concave first intaglio curved surfaces 10b and 10b ′. The radius of curvature (R2) is 200mm ± α, the α is preferably 20mm. As such, the shape in which both ends in the width direction between the lumbar contact point (b) and the thoracic contact point (a) are concave and surround the back prevent scoliosis and also have a left and right support effect of the thoracic spine.

The scoliosis refers to a state in which the spine is bent to the left or to the right when viewed from behind, and is a kind of scoliosis.

The curved shape of the back plate 10 and the seat plate 12 for each part is shown in FIGS. That is, between the first intaglio curved surfaces 10b and 10b 'is formed as a concave second intaglio curved surface 10c, and the width direction of the lumbar contact point c is formed as a concave third intaglio curved surface 10d. The longitudinal direction of the lumbar contact point (c) is formed of the first convex curved surface (10e), the width direction both sides of the rear portion of the seat plate 12 is formed of the concave fourth negative curved surface (12a, 12a '), respectively, The center rises, and the width direction both sides of the front part of the seat plate 12 are formed as concave fifth intaglio curved surfaces 12b and 12b ', respectively, and both ends and the center rise, and the width direction both sides of the front part of the seat plate 12 are formed. The second embossed surface 12c is formed in the longitudinal direction of the seat plate 12.

As such, the intaglio curved surface or the relief curved surface formed on each part of the back plate and the seat plate maximizes the contact surface with the human body and minimizes the pressure applied to the skin surface.

In particular, the radius of curvature R1 of the second negative curved surface 10c is 380 mm ± α, the radius of curvature R3 of the third negative curved surface 10d is 1000 mm ± α, and the first positive curved surface 10e. The radius of curvature of R6 is 100mm ± α, the radius of curvature R4 of the fourth negative curved surface (12a, 12a ') is 700mm ± α, the radius of curvature of the fifth negative curved surface (12b, 12b') ( R5) is 1000 mm ± α, and the radius of curvature R7 of the second relief surface 12c is 800 ± α. Here, it is preferable that said alpha is 20 mm. The radius of curvature is set on the basis of the standard position of Korean male and female 18 to 50 years old, and provides the most suitable chair for adult Koreans.

According to the non-cushion type chair according to the present invention, the anatomical shape of the spine and the pelvis is taken into consideration so that the curvature angle of the lumbar spine is maintained at the time of sitting, thereby minimizing the load on the muscles, ligaments and discs of the lumbar region. It prevents the pelvic rearward rotation and maximizes the lumbar spine angle correction effect for users who have low back pain or weak muscle power.

In addition, both ends in the width direction between the lumbar contact point and the thoracic contact point are concave, so that the shape surrounding the back prevents scoliosis and has a left and right support effect of the thoracic spine. Maximize the contact surface with the human body and minimize the pressure on the skin surface.

Claims (4)

In the non-cushion chair seated in direct contact with the back and the seat, A nonlinear angle formed by a horizontal line passing through a reference point set at the rear of the seat plate, an inclination line passing through the lumbar contact point set at the middle of the back plate and the thoracic contact point set at the upper part of the back plate is 95 ° to 100 °; Cushioned chair. The method of claim 1, Non-cushion type chair, characterized in that the distance between the reference point and the lumbar contact point is determined by the following formula within the range of 120cm ~ 160cm. Distance (cm) = 0.139 x height (mm)-8.606 The method of claim 1, Non-cushion type chair, characterized in that the width direction both ends between the lumbar contact point and the thoracic spine contact point in the back plate is formed as a concave first intaglio curved surface. The method of claim 1, Between the first intaglio curved surface is formed as a concave second intaglio curved surface, The width direction of the lumbar contact point is formed as a concave third intaglio curved surface, The longitudinal direction of the lumbar contact point is formed of a first convex curved surface, The width direction both sides of the rear part of the seat plate are each formed as a concave fourth intaglio curved surface so that both ends and the center are raised. Both sides in the width direction of the front of the seat plate is formed as a concave fifth intaglio curved surface, and both ends and the center are raised, Non-cushion type chair, characterized in that the second embossed curved surface in the longitudinal direction of the seat plate is formed on both sides in the width direction of the front of the seat plate.