WO2023027296A1

WO2023027296A1 - Mechanism for adjusting height of back plate of chair

Info

Publication number: WO2023027296A1
Application number: PCT/KR2022/007267
Authority: WO
Inventors: 이규윤; 신유식
Original assignee: 주식회사 다원체어스; 한국섬유소재연구원
Priority date: 2021-08-23
Filing date: 2022-05-23
Publication date: 2023-03-02
Also published as: KR102366832B1

Abstract

The present invention provides a mechanism for adjusting the height with respect to a back plate of a chair, comprising: a main body (10) having a vertical frame (13); a guide member (20) having a guide bar (25) in which a plurality of seating grooves (26) are formed vertically and adjacent to each other on the vertical frame (13) of the main body (10); a back plate member (30) supported by a guide pin (21) and an elongated portion (31) on the vertical frame (13) so as to be vertically movable; and a locking member (40) having a locking bar (41) at a position opposite to the guide bar (25) on the back plate member (30), and sequentially engaging the locking bar (41) into the seating grooves (26) so as to change the height. Accordingly, there is an effect of reducing cost and increasing durability while conveniently maintaining an appropriate posture on the basis of a simple configuration by adjusting the height of the back plate in accordance with the physical condition of a user sitting in the chair.

Description

Chair height adjustment device

The present invention relates to a chair adjustment mechanism, and more particularly, to a chair backrest height adjustment mechanism for maintaining an appropriate posture in accordance with physical conditions of a user sitting on a chair.

In general, various types of chairs are used at home or at work, and are equipped with an adjustment function to suit physical conditions when sitting for a long time. However, in the case of chairs that are provided in large quantities, such as for group facilities, they are based on synthetic resin materials and exclude the adjustment function to reduce costs. Even if functions such as backrest and seat control are added, structural simplicity and durability are recognized as important design elements.

Korean Patent Registration No. 1678809 (Prior Document 1) and Korean Patent Registration No. 1104214 (Prior Document 2) are known as prior art documents that can be referred in this regard.

In Prior Document 1, the upper part of the chair armrest frame is inclined upward, the armrest coupling part of the backrest part is fitted to the upper part, and the position of the armrest coupling part is locked or unlocked at the upper part by a fixing lever, and the backrest part slides along the upper part. As a result, the height of the backrest and the depth of the seat are adjusted. Therefore, the effect of ensuring safety is expected because the structure is simple and there is no looseness.

Prior Document 2 includes a moving table fixed to a back plate while sliding on a fixing table, and a locking member that is caught on a locking jaw of a sliding groove according to the moving table, and the locking member is caught on or released by a spring on the moving table. A locking adjustment means for automatically adjusting the step-by-step adjustment of the moving platform is installed. Accordingly, effects of reducing components and volume and facilitating manufacturing and assembly are expected.

However, according to Prior Document 1, the functional parts are concentrated in the armrest coupling part, and according to Prior Document 2, since two springs are provided, structural simplification of backrest adjustment is insufficient, showing room for improvement.

[Prior art literature]

(Patent Document 1) Korean Patent Registration No. 1678809 "A chair capable of adjusting the height of the backrest and the depth of the seat" (published on July 4, 2016)

(Patent Document 2) Korean Patent Registration No. 1104214 "Device for adjusting the height of the back of a chair" (Publication date: 2011.04.15.)

An object of the present invention to improve the conventional problems as described above is to adjust the height of the backrest in accordance with the physical condition of the user sitting on the chair, so that the backrest of the chair is conveniently maintained in an appropriate posture based on a simple configuration. It is to provide a height adjustment mechanism.

In order to achieve the above object, the present invention is a mechanism for adjusting the height of the back of a chair: a main body having a vertical frame; a guide member having a guide bar formed adjacent to a plurality of seating grooves vertically on the vertical frame of the main body; a climbing member supported on the vertical frame to be movable up and down by guide pins and slots; and a hanging member provided with a hanging rod at a position facing the guide bar in the climbing member and varying in height by sequentially engaging the hanging rod with the seating groove.

According to the detailed configuration of the present invention, the guide bar of the guide member is formed by connecting the seating groove portion and the curved surface portion on one side, and is formed by connecting the straight drop groove portion on the other side.

According to the detailed configuration of the present invention, the seating groove portion, the curved surface portion, and the falling groove portion are characterized in that they are formed inclined with respect to a vertical line.

According to the detailed configuration of the present invention, the hanging bar of the hanging member is characterized in that it has an upper shaft rotatably connected to the climbing member and a lower shaft that sequentially moves one side and the other side of the guide bar.

According to the detailed configuration of the present invention, the hanging bar is engaged with the slit portion of the climbing member through a leaf spring coupled to the lower end, and receives elastic force for returning to the original position.

As described above, according to the present invention, by adjusting the height of the backrest in accordance with the physical condition of the user sitting on the chair, it is possible to conveniently maintain an appropriate posture based on a simple configuration, while at the same time reducing costs and increasing durability.

1 is a perspective view showing a chair to which a mechanism according to the present invention is applied

Figure 2 is a schematic diagram showing a partially enlarged main part in Figure 1

Figure 3 is a schematic diagram showing the operation at the lowest height of the backrest in Figure 1

Figure 4 is a schematic diagram showing the operation at the highest height of the backboard in FIG.

Hereinafter, embodiments of the present invention will be described in detail based on the accompanying drawings.

The present invention proposes a mechanism for adjusting the height of the back of a chair. It is intended for chairs based on synthetic resin materials, which are provided in large quantities in group facilities, etc., but are not necessarily limited thereto. The height of the backrest is manually adjusted to meet the user's physical condition.

The main body 10 according to the present invention has a structure with a vertical frame 13.

Referring to FIG. 1, a horizontal frame 11, a vertical frame 13, and a central bar 15 constituting the body 10 are shown. The body 10 is divided into a horizontal frame 11 supporting the seat and a vertical frame 13 supporting the backrest. The main body 10 is connected to the leg through the central bar 15 in the horizontal frame 11.

In addition, according to the present invention, the guide member 20 has a structure including a guide 25 in which a plurality of seating grooves 26 are vertically adjacent to each other on the vertical frame 13 of the main body 10. .

Referring to FIGS. 1 and 2 , the guide 25 and the seating groove 26 constituting the guide member 20 are shown. Guide table 25 is formed at a position symmetrical to one side and the other side of the vertical frame (13). The guide bar 25 has a comb or saw shape including a plurality of seating grooves 26 and may be simultaneously formed during injection molding of the vertical frame 13 made of synthetic resin. The seating groove 26, which is the main part of the guide 25, is formed in a substantially semicircular or C-shape. In the illustration, three seating grooves 26 are arranged adjacently on a vertical line.

In addition, according to the present invention, the climbing member 30 is supported by the guide pins 21 and the long holes 31 on the vertical frame 13 so as to be able to move up and down.

1 and 2, guide pins 21 and slotted parts 31 required for assembling the climbing member 30 are shown. The climbing member 30 has a headrest 33 at its upper end and is coupled to the vertical frame 13 using guide pins 21. The long hole 31 is vertically penetrated through one side and the other side of the climbing member 30, and can be separated vertically to prevent weakening of strength. The guide pin 21 is fixed to the vertical frame 13 to prevent the climbing member 30 from being separated by coming into contact with the outside of the long portion 31 at one end of the head portion 22 . When the user lifts the climbing member 30 upward, the guide pin 21 descends when viewed from the long part 31 as a standard.

In addition, according to the present invention, the hanging member 40 having a hanging bar 41 at a position facing the guide bar 25 in the climbing member 30 sequentially engages the hanging bar 41 with the seating groove 26, It is a structure that fluctuates in height.

Referring to FIGS. 2 to 4 , a state in which the cradle 41 constituting the catching member 40 is interposed between the guiding member 20 and the climbing member 30 is shown. The hanger 41 can move up and down together with the climbing member 30 and engage with one of the plurality of seating grooves 26 of the guide 25. When the cradle 41 is engaged with the lowermost seating groove 26, the climbing member 30 is maintained at the minimum height as shown in FIG. 3, and when engaged with the uppermost seating groove 26, the climbing member 30 has the maximum maintained at a height

According to the detailed configuration of the present invention, the guide bar 25 of the guide member 20 is formed by connecting the seating groove 26 and the curved surface portion 27 on one side and connecting the straight drop groove 28 on the other side. It is characterized in that it is formed by.

In FIG. 2 , a seating groove 26 , a curved surface 27 , and a drop groove 28 constituting the guide 25 are shown. The approximately semicircular or C-shaped seating grooves 26 are alternately connected by curved surface portions 27, and the uppermost and lowermost seating grooves 26 on the opposite side of the seating grooves 26 are straight to the drop grooves 28. Connected. Based on the illustrated state, the guide bar 25 has a curved surface portion 27, a seating groove portion 26, a curved surface portion 27, a seating groove portion 26, a curved surface portion 27, and seating in a clockwise direction from the bottom dead center. It leads to the groove part 26, the curved surface part 27, and the drop groove part 28. This is the same as the circulation path along which the lower shaft 43 of the hanger 41 moves, which will be described later.

According to the detailed configuration of the present invention, the seating groove portion 26, the curved surface portion 27, and the falling groove portion 28 are characterized in that they are formed inclined with respect to a vertical line.

In FIGS. 3 and 4 , the inclined state of the seating groove 26 , the curved surface 27 , and the drop groove 28 is shown. The seating groove 26 is inclined at an angle of about 45 degrees to the left with respect to the vertical line, so that it can be closely engaged with the lower shaft 43 of the cradle 41. The curved surface portion 27 assists the lower shaft 43 to smoothly move from the lower seating groove 26 to the upper seating groove 26 by making an inclination of about 45 degrees with respect to the vertical line. The drop groove 28 is tilted approximately 5 degrees to the right with respect to the vertical line to assist the lower shaft 43 to drop quickly and return to its original position.

According to the detailed configuration of the present invention, the hanging bar 41 of the hanging member 40 sequentially connects the upper shaft 42 rotatably connected to the climbing member 30 and one side and the other side of the guide 25. It is characterized by having a moving lower shaft (43).

In FIG. 2 , an upper shaft 42 and an upper shaft 42 constituted by the cradle 41 of the catching member 40 are shown. The cradle 41 is shown in the form of a link up and down, but is not limited thereto. The upper shaft 42 is fixed to the upper region of the cradle 41 and is rotatably connected to the climbing member 30 . The lower shaft 43 is fixed to the lower area of the hanger 41 and is adjacent to or in contact with the guide 25. Whenever the user raises the climbing member 30, the hanging bar 41 is interlocked by the upper shaft 42, and the lower shaft 43 sequentially moves along the set circulation path of the guide bar 25.

According to the detailed configuration of the present invention, the hanger 41 is engaged with the slit portion 35 of the climbing member 30 through the leaf spring 45 coupled to the lower end, and receives elastic force for returning to the original position. do.

In Figures 2 to 4, the plate spring 45 provided on the hook 41 of the hook member 40 is shown. The leaf spring 45 is fixed to the hanger 41 at the upper end and fixed to the slit portion 35 of the climbing member 30 at the lower end. The position of the cradle 41 is fixed by the upper shaft 42 at the upper end, but can be elastically deformed by the leaf spring 45 at the lower end, which is a free end. The plate spring 45 is elastically deformed to the left based on the normal position (reference numeral 45') in the state of FIG. 3 (b), and elastically deformed to the right based on the normal position in the state of FIG. 4 (b).

Accordingly, the lower shaft 43 located in the middle between the upper shaft 42 and the leaf spring 45 moves along the circulation path of the guide 25, forming the seating groove 26, the curved surface 27, and the drop groove. (28) to prevent wear and durability deterioration due to unnecessary interference/collision and minimize operating noise.

3 and 4, an example of how the mechanism according to the present invention works will be described.

3(a) shows a state in which the lower shaft 43 of the hanging bar 41 is located at the bottom dead center of the guide bar 25, the height of the climbing member 30 is the lowest and the plate spring 45 is in the correct position, resulting in elastic deformation. There is no As shown in FIG. 3(b), when the user slightly lifts the climbing member 30, the lower shaft 43 of the hanging bar 41 goes up along the curved surface 27 at the lower end, and the plate spring 45 is elastically deformed to the maximum. Thereafter, the moment the lower shaft 43 reaches the inlet of the seating groove 26, it is closely engaged with the seating groove 26 by the elastic force of the leaf spring 45. In this way, it is possible to sequentially and gradually increase the change in height of the climbing member 30 .

4(a) shows a state in which the lower shaft 43 of the hanging bar 41 is engaged with the seating groove 26 at the uppermost stage, and the height of the climbing member 30 is the highest and the plate spring 45 is in the correct position, so there is no elastic deformation. . As shown in FIG. 4(b), when the user slightly lifts the climbing member 30, the lower shaft 43 of the hanging bar 41 passes through the top dead center of the guide bar 25 and the plate spring 45 is slightly elastically deformed. Thereafter, while the lower shaft 43 moves through the drop groove 28, it maintains a sliding state without free fall due to the elastic force of the leaf spring 45.

On the other hand, in the present invention, although the guide member 20 of the guide member 20 is illustrated as having three seating grooves 26, the height of the climbing member 30 can be adjusted in four or more steps as the number increases.

The present invention is not limited to the described embodiments, and it is obvious to those skilled in the art that various modifications and variations can be made without departing from the spirit and scope of the present invention. Therefore, such variations or modifications should fall within the scope of the claims of the present invention.

[Description of code]

10: body 11: horizontal frame

13: vertical frame 15: central bar

20: guide member 21: guide pin

22: head part 25: guide

26: seating groove 27: curved surface

28: fall groove 30: climbing member

31: bowel study 33: headrest

35: slit part 40: holding member

41: hanger 42: upper shaft

43: lower shaft 45: leaf spring

It maintains an appropriate posture in accordance with the physical condition of the user sitting on the chair.

Claims

In the mechanism for adjusting the height of the back of the chair:

Body 10 having a vertical frame 13;

a guide member 20 having a guide 25 formed adjacent to a plurality of seating grooves 26 vertically on the vertical frame 13 of the main body 10;

a climbing member (30) supported on the vertical frame (13) to be able to move up and down by guide pins (21) and slotted holes (31); and

A hanging member 40 having a hanging bar 41 at a position facing the guide bar 25 in the climbing member 30 and changing the height by sequentially engaging the hanging bar 41 in the seating groove 26; The backrest height adjustment mechanism of the chair, characterized in that comprising a.
The method of claim 1,

The guide 25 of the guide member 20 is formed by connecting the seating groove 26 and the curved surface 27 on one side and by connecting the straight drop groove 28 on the other side. backrest height adjustment mechanism.
The method of claim 2,

The seating groove (26), the curved surface (27), and the falling groove (28) are formed inclined with respect to a vertical line.
The method of claim 1,

The hanging bar 41 of the hanging member 40 includes an upper shaft 42 rotatably connected to the climbing member 30 and a lower shaft 43 that sequentially moves one side and the other side of the guide 25. The backrest height adjustment mechanism of the chair, characterized in that it is provided.
The method of claim 4,

The chair back height adjustment mechanism, characterized in that the hanging rod 41 engages with the slit portion 35 of the back member 30 through the plate spring 45 coupled to the lower end to receive elastic force for returning to the original position.