KR100459987B1 - The back of chair with auxiliary support waist - Google Patents

Abstract

PURPOSE: A chair having a backrest with an auxiliary waist support which is projected and rotated in the state having an elastic force without horizontal gravity because of a spring elasticity, is provided to allow a user to conveniently sit on the chair by always supporting his/her waist with aid of the auxiliary waist support. CONSTITUTION: The chair having a backrest with an auxiliary waist support includes: a backrest support(10); an insertion recess(11), arranged in the center of the backrest support(10) to be inserted by a height regulating bar(42) and having a bolt fixture(17); a spring supporting plate(14), arranged in the lower center of the backrest support(10) and supporting a spring holder; a bolt penetration ring(15), arranged respectively on both sides of the spring supporting plate(14); a connection plate(20) of the auxiliary waist support(30); an elastic spring(24), arranged on the outer circumference of a connection tube(22) on the upper portion of the connection plate(20); a spring insertion hole(25), arranged on the connection plate(20); and a swivelling bolt hole(21).

Description

The back of chair with auxiliary support waist}

The present invention relates to a chair provided with an auxiliary backrest, and more particularly, by installing an auxiliary backrest on the back of the chair so that the auxiliary backrest protrudes from the backrest, thereby supporting the lower back part that cannot be supported in a general chair. A chair is provided with a backrest.

In general, the chair is connected to the support plate and the back plate, the lower part of the seat consists of a leg with a wheel. Most of the office workers or students who sit in such chairs for a long time have a problem that their backs easily get tired when they sit for a long time because they study or work while sitting slightly away from their backs.

In order to solve this problem, the auxiliary backrest is provided to support the back of the worker by providing an auxiliary backrest in the backrest, and the inventor of the present invention has been registered as a utility model registration No. 243652.

The conventional design has a disadvantage in that the configuration is complicated and inconvenient to use.

The present invention was developed in view of the conventional problems, and an object of the present invention is to provide an auxiliary backrest in the backrest, the backrest is elasticity without flatness due to the elasticity of the spring wound twisted in the opposite direction around the center By protruding and rotating as having a state, so that the user's waist can always support the cushioning elastic force, to provide a chair with an auxiliary backrest that allows the user to sit comfortably in the chair to work or study.

1 is an exploded perspective view illustrating a chair equipped with the present invention backrest

Figure 2 is a perspective view illustrating a chair equipped with the present invention backrest

Figure 3 is a partial side cross-sectional view illustrating a chair equipped with the present invention backrest

Figures 4a to 4d is a perspective view and a partial cross-sectional view illustrating an assembled state of the chair with the auxiliary backrest is installed

<Code Description of Main Parts of the Invention>

10: Backrest

11: Height guide insert

12: Back bolt hole

13: Fixing bolt

13a: nuts

14: spring support plate

15: Bolt through ring

16: Fastening Bolt

17: Fastening bolt hole

18: Fastener

20: auxiliary backrest connecting rod

21: Rotating bolt hole

22: connector

24: spring

24a: catch

25: spring insertion hole

26: Rotating bolt

26a: nuts

29: Hoedong Guk Home

30: auxiliary back

31: Hoedong-gu

40: chair

41: support

42: height adjustment

43: height adjustment hole

44: seat

45: backrest

45a: back bolt

In order to achieve the above object, the present invention provides a chair having an auxiliary backrest (30) installed on a backrest (45),

In the center of the backrest 10, a height adjusting means insertion portion 11 having a fastening bolt hole 17 is formed, and at the lower end thereof, the spring 24 is supported by the engaging portion 24a of the spring 24. The spring support plate 14 is configured, the bolt through ring 15 is configured on both sides of the spring support plate 14,

On the outer circumferential surface of the connecting pipe 22 formed at the upper side of the auxiliary back support 20, the twisting directions are twisted in opposite directions with respect to the catching part 24a at the center of the spring 24 so that an elastic spring 24 having no bias is inserted. Both ends of the spring 24 are fitted into the spring insertion hole 25 formed in the auxiliary back support connecting portion 20,

The auxiliary backrest connecting rod 20 is coupled to the backrest 10 by fixing with a nut 13a through the bolt through ring 15 and the connecting pipe 22 on one side and the bolt through ring 15 on the other side. Become,

A pivoting groove fitting groove 29 is formed at the lower center of the auxiliary back support connecting rod 20, and a pivoting bolt hole 21 is formed at both sides of the pivoting fitting groove 29 to form a pivoting bolt formed on the back of the auxiliary backrest 30. A rotating hole 31 having a hole 31a is fitted into the rotating hole fitting groove 29 so that the auxiliary backrest 30 is coupled to the auxiliary backrest connecting rod 20 by the rotating bolt 26 and the nut 26a. It relates to a chair provided with auxiliary backrest.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

As shown in Figure 1 to Figure 3 in the center of the backrest 10 is a height adjustment unit insertion portion 11 is formed with a fastening bolt through hole 17 is configured. The height adjuster 42 is inserted into the height adjuster inserting portion 11, the height adjusting hole 43 is formed in the long hole, and adjust the height of the fastening bolt 16 after positioning the backrest 10 at a suitable height. After penetrating through the hole 43 and the fastening bolt hole 17, the nut is fastened to the fastener 18 is configured is configured to adjust the height of the backrest 10.

Both sides of the backrest 10 are formed with a back bolt hole 12 so that the backrest 45 is coupled to the backrest 10 by the back bolt 45a, and the bottom of the backrest 10 has a spring 24. A spring support plate 14 is configured to engage and support the locking portion 24a so that the elasticity of the spring 24 is generated. A bolt through ring 15 through which the fixing bolt 13 penetrates is formed at both sides thereof.

Auxiliary backrest support 20 is connected to the backrest 10 and the auxiliary backrest 30 to support the user's waist by the spring 24 by the elastic force and the auxiliary backrest by the connecting pipe 22 and the rotating bolt 26 In that 30 is rotated,

The upper part of the auxiliary backrest connecting member 20 is formed with a connecting tube 22 having a spring 24 inserted so that the backrest 10 and the fixing bolt 13 are connected and rotated, and both ends of the spring 24 are fitted. Spring fitting holes 23 are formed so as to lose.

The high-elastic spring 24 lined on the outer circumferential surface of the connecting pipe 22 has a locking portion 24a formed at the center thereof so as to be in contact with the spring support plate 14, and the twisting direction is centered around the locking portion 24a. The springs 25 are twisted in opposite directions, and both ends are fitted into the spring insertion holes 23, respectively.

In addition, the rotation center fitting groove 29 is configured to rotate by inserting the rotation hole 31 of the auxiliary back support 30 in the lower center of the auxiliary back support connecting rod 20, the rotation bolt (29) on both sides of the rotation bolt fitting groove (29) The turning bolt hole 21 is formed so that 26 may penetrate.

At the center of the rear of the auxiliary backrest (30) supporting the back of the back portion is formed a pivoting hole 31 is formed with a rotating bolt hole (31a).

The upper portion of the support 41 connected to the seat plate 44 is inserted into the height adjustment inserting portion 11 of the backrest 10 is configured to adjust the height of the backrest 10, the height adjustment 42 is configured, In the center, the height adjustment hole 43 of the long hole is formed so that the backrest 10 can be adjusted by the fastening of the fastening bolt 16.

An example of the assembly state of the chair with the auxiliary backrest configured as described above is as follows.

First, as shown in FIGS. 4A and 4B, the fixing bolt 13 is sequentially passed through one bolt through ring 15, the connecting pipe 22, and the other through the bolt through ring 15, and then fixed with a nut 13a.

With this fixing, a strong elastic spring 24 having no twisting direction in which the twisting direction is twisted in the opposite direction about the locking portion 24a is caught by the locking portion 24a against the spring support plate 14 and the spring 24 Both ends are inserted into the spring insertion hole 25 so that elasticity is generated. That is, the lower part of the auxiliary backrest connecting portion 20 has a strong elasticity and protrudes to the front side with a strong elasticity as the connecting pipe 22 as an axis, thereby generating elastically elastic buffering force back and forth in a fluid manner.

As shown in FIG. 4C, the back bolt 45a is fastened to the back of the backrest 45 through the back bolt hole 12 to couple the backrest 45 to the backrest 10.

After the rotation hole 31 of the auxiliary backrest 30 is positioned in the rotation hole fitting groove 29, the rotation bolt 26 is rotated on one side of the rotating bolt hole 21 and the rotational bolt hole 31a and the other side of the rotating bolt. After passing through the hole 21 and fixed with the nut 26a, the auxiliary backrest 30 and the backrest connecting rod 20 are coupled.

Due to this coupling, the auxiliary backrest 30 rotates up and down in accordance with the user's waist position with the pivoting bolt 26 as the shaft, so that the user can sit comfortably in the chair 40.

After inserting the height adjuster 42 of the support 41 into the height adjuster inserting portion 11 of the backrest 10, as shown in Figure 4d, the backrest 10 is positioned at a comfortable height for the user When the fastening bolt 16 is inserted into the height adjusting hole 43 and the fastening bolt hole 17 and fastened by the fastener 18, the height of the backrest 10 is appropriately adjusted and fixedly coupled to the support 41.

The present invention configured as described above can support the user's waist at all times because the auxiliary backrest connecting rod 20 and the auxiliary backrest 30 rotate with elastic force according to the degree and position of the user's waist pressed.

As described above, according to the present invention, the auxiliary backrest 30 is installed on the backrest 45 so that the user can always support the waist by the auxiliary backrest 30 even if the user does not stand the waist. It can be, and it is effective to reduce or prevent low back pain that occurs a lot in modern people.

Claims (1)

In a chair provided with an auxiliary backrest in the backrest, In the center of the backrest support 10 is a height adjustment section insertion portion 11 having a fastening bolt hole 17 is formed, and at the bottom thereof, a spring support plate 14 on which the engaging portion 24a of the spring 24 is supported. Is configured, the bolt through ring 15 is configured on both sides of the spring support plate 14, On the outer circumferential surface of the connecting pipe 22 formed at the upper side of the auxiliary backrest connecting rod 20, an elastic spring 24 having twisted directions twisted in opposite directions with respect to the center engaging portion 24a is fitted. Both ends are inserted into the spring insertion hole 25 formed in the auxiliary back support connecting rod 20, The auxiliary backrest connecting table 20 is supported by a bolt 13 through a bolt through ring 15 and the connecting pipe 22 and the bolt through ring 15 of the other side fixing bolt 13 is fixed by a nut (13a) Coupled to (10), The lower center of the auxiliary back support connecting rod 20 is composed of a rotational fitting groove 29, the rotating bolt hole 21 is formed on both sides of the rotational fitting groove 29, The auxiliary backrest 30 has a pivoting hole 31 having a pivoting bolt hole 31a formed at its rear side thereof fitted into the pivoting groove 29 and the auxiliary backrest connecting rod 20 by the pivoting bolt 26 and the nut 26a. A chair with an auxiliary backrest, characterized in that coupled to the.