WO2006041232A1

WO2006041232A1 - Chair

Info

Publication number: WO2006041232A1
Application number: PCT/KR2004/002829
Authority: WO
Inventors: Gyu-Youn Lee
Original assignee: Gyu-Youn Lee
Priority date: 2004-10-13
Filing date: 2004-11-04
Publication date: 2006-04-20
Also published as: KR100499792B1

Abstract

Disclosed is a chair (100) having a waist support including: a seat (120) capable of being taken by a user; a backrest (140) connected to the seat (120) to be resiliently supported by a support frame (130); an auxiliary seat (150) spaced apart on the seat (120), and provided thereunder with a rod (152) to pass through the seat (120); a waist support (170) installed in front of the backrest (140) to be spaced apart from the backrest (140); and a connecting frame (160) passing through the backrest (140) and having both ends pivotally connected to the waist support (170) and the rod (152) of the auxiliary seat (150) respectively and pivotally connected to the seat (120) on one side thereof to allow the auxiliary seat (150) and the waist support (170) to cooperate with each other.

Description

CHAIR

Technical Field

The present invention relates to a chair having a waist support, and more 5 particularly, to a chair capable of supporting a user's waist by a waist support moving automatically as soon as the user sits on the chair.

Background Art

In general, a conventional chair includes a seat and a backrest.

10 The backrest is provided to support a user's back when the user sits on the chair and leans against the backrest, which is installed to be resiliently bent backward at a predetermined angle.

Meanwhile, when the backrest is bent by the user as described above, an empty space is generated between the user's waist and the backrest not to support the waist, as 15 a result, the user who works or studies sitting on the chair for a long time is subjected to accumulated fatigue applied to the waist.

Therefore, in order to solve the problem, the user sits on the chair with interposing a separate cushion, and so forth between the waist and the backrest.

However, when the user uses the separate cushion on this conventional

20 backrest as described above, since the cushion is not fixed to the chair, the cushion is not maintained in place and severely moved not to stably support the waist of the user.

Disclosure of the Invention

Therefore, the present invention has been made in view of the above-

2.5 mentioned problems, and it is an object of the present invention to provide a chair capable of supporting a waist of a user by installing a waist support separately operated from the backrest to automatically operate the waist support simultaneously when the user sits on the chair.

In order to accomplish the above object, there is provided a chair including a

30 seat capable of being taken by a user; an auxiliary seat spaced apart on the seat and provided thereunder with a rod to pass through the seat; a connecting frame pivotally coupled to the rod of the auxiliary seat and pivotally connected to the seat on one side thereof; and a waist support pivotally connected to the connecting frame to be operated depending on the auxiliary seat. Preferably, the chair includes a backrest installed to be spaced apart at the rear of the waist support and connected to the seat to be resiliently supported by a support frame.

In addition, the backrest has a through hole, through which the connecting frame is passed.

Further, a compression spring is installed to the rod between the auxiliary seat and the seat to resilient support the auxiliary seat upward against the seat.

Furthermore, the rod projected from a bottom surface of the auxiliary seat is integrally formed with the auxiliary seat, and the waist support is pivotally jointed to the connecting frame through a bracket integrally formed with the waist support.

Brief Description of the Drawings

The foregoing and other objects, features and advantages of the present invention will become more apparent from the following detailed description when taken in conjunction with the accompanying drawings in which:

FIG. 1 is a perspective view of a chair in accordance with the present invention;

FIG. 2 is an exploded perspective view of a waist support of a chair in accordance with the present invention; FIG. 3 is a cross-sectional view of a waist support in accordance with the present invention; and

FIGS. 4 A and 4B are views sequentially illustrating the states before and after a chair having a waist support in accordance with the present invention is operated.

Best Mode for Carrying Out the Invention

Hereinafter, a preferred embodiment of the present invention and the above basic concept will be described with reference to accompanying drawings.

FIGS. 1 to 4 are views of a chair having a waist support in accordance with the present invention. As shown in FIG. 1, a chair 100 of the present invention generally includes a seat 120, a backrest 140, means for supporting a waist, etc. However, since a waist support 170 of the waist supporting means, also, functions as the backrest 140, the backrest 140 may be removed.

The seat 120 is fixedly attached on a fixing plate 122, and a supporting member 110 having a plurality of wheels 112 is screwed with the fixing plate 122. The seat 120 is installed to move up and down along the supporting member 110. The backrest 140 is disposed approximately perpendicular to the seat. A supporting frame 130 folded in a substantially "U" shape is rotatably coupled to the fixing plate 122 of the seat 120 on one end, and is coupled to a rear surface of the backrest 140 on the other end, thereby resiliently supporting the back of the user.

In addition, as shown in FIGS. 2 and 3, the waist supporting means includes the waist support 170 for supporting the waist of the user who sat on the chair 100, and an auxiliary seat 150 cooperated with the waist support 170.

The auxiliary seat 150 is spaced apart from the seat 120. The auxiliary seat 150 is provided with a plurality of rods 152 projected from the bottom surface of the auxiliary seat 150, wherein the rods 152 pass through the seat 120 to be placed under the seat 120.

In this connection, the rods 152 may be integrally formed with the auxiliary seat 150 by an injection molding method.

Meanwhile, a compression spring 154 for resiliently supporting the auxiliary seat 150 to be spaced apart from the seat 120 upward is installed at the rod 152 between the auxiliary seat 150 and the seat 120, thus providing recovering force to the auxiliary seat 150.

In addition, the waist support 170 is installed in front of the backrest 140 to be spaced apart from the backrest 140, and the waist support 170 and the auxiliary seat 150 are connected by a plurality of connecting frames 160 to cooperate with each other. The waist support 170 is integrally formed with a bracket 172 of a substantially

"C" shape by an injection molding method. The bracket 172 is pivotally hinged to the connecting frame 160 by a pintle 174, and the waist support 170 is pivoted up and down about the pintle 174. Thereby, the waist support 170 can be securely brought into close contact with the variously bent back of the user. Meanwhile, while the embodiment has described the backrest 140 of the chair

100 as an exemplary embodiment, the backrest 140 may be removed because the waist support 170 also functions as the backrest as set forth above.

The connecting frame 160 is formed in a substantially "U" shape. The connecting frame 160 pass through the backrest 140 to be coupled to the rear surface of the waist support 170 on one end, and is pivotally connected to an end of the rod 152 of the auxiliary seat 150 on the other end.

In addition, the connecting frame 160 is pivotally hinged to the bracket 124 projected from the bottom surface of the fixing plate 122 by a fulcrum 162, thus pivoting about the fulcrum 162 on the principle similar to a lever. Thereby, the auxiliary seat 150 and the waist support 170 are cooperated with each other.

At this time, the backrest 140 has a through hole 142, through which the connecting frame 160 is passed. The through hole 142 makes it possible to secure a minimum space where the connecting frame 160 can be operated without any interference. Meanwhile, it does not matter that the waist support 170 and the auxiliary seat

150 are enclosed with the backrest 140 and the seat 120 by an enclosure material of the chair 100, respectively. However, in consideration of operations of the waist support 170 and the auxiliary seat 150, the waist support 170 and the auxiliary seat 150 are more preferably separated and projected from the backrest 140 and the seat 120, respectively. Hereinafter, a process of supporting the waist using the chair in accordance with the present invention will be described.

First, in the state of FIG. 4A, when the user sits on the seat 120 of the chair 100, the auxiliary seat 150 projected on the seat 120 presses the compression spring 154 and is lowered toward the seat 120 by the user's weight. As a result, the lowered auxiliary seat 150 causes the rod 152 to be lowered.

Owing to the lowering of the rod 152, the connecting frame 160 whose one end is pivotally connected to the rod 152 is pivoted about the fulcrum 162 of the bracket 124 of the fixing plate 122, thereby extracting the waist support 170 connected to the other end of the connecting frame 160 in the forward direction of the backrest 140. The extracted waist support 170 securely supports the waist of the user who sat on the chair 100.

At this time, since the waist support 170 is pivotally hinged by the pintle 174 of the bracket 172, the waist support 170 is securely brought into close contact with the variously bent user's back, thereby supporting the user's back. In addition, since the backrest 140, through which the connecting frame 160 is passed, has the through hole 142 corresponding to operation, i.e., moving direction of the connecting frame 160, the connecting frame 160 is operated without any interference with the backrest 140.

Therefore, the waist support 170 can release the fatigue applied to the waist by securely and continuously supporting the waist of the user sat on the chair 100 in place. Meanwhile, when the user stands up from the chair, the compression spring 154 between the auxiliary seat 150 and the seat 120 is recovered to its original state to raise the lowered auxiliary seat 150, and the connecting frame 160 is pivoted about the fulcrum 162 in the reverse direction of the above-mentioned direction by the raised auxiliary seat 150, thereby recovering the waist support 170 extracted in the forward direction toward the backrest in its original state.

Industrial Applicability

As can be seen from the foregoing, in accordance with the chair of the present invention, the fatigue applied to the user's waist can be released to promote the user's health, as the waist support is projected from the backrest simultaneously when the user sits on the chair to continuously and securely support the user's waist during sitting on the chair.

Claims

1. A chair comprising: a seat (120) capable of being taken by a user; an auxiliary seat (150) spaced apart on the seat (120), and provided thereunder with a rod (152) to pass through the seat (120); a connecting frame (160) rotatably coupled to the rod (152) of the auxiliary seat (150) and rotatably coupled to the seat (120) on one side thereof; and a waist support (170) rotatably connected to the connecting frame (160) to cooperate with the auxiliary seat (150).

2. The chair according to claim 1, further comprising a backrest (140) installed to be spaced apart at the rear of the waist support (170), and connected to the seat (120) to be resiliently supported by a support frame (130).

3. The chair according to claim 2, wherein the backrest (140) has a through hole

(142), through which the connecting frame (160) passes.

4. The chair according to any one of claims 1 to 3, wherein a compression spring (154) is installed at the rod (152) between the auxiliary seat (150) and the seat (120) to resiliently support the auxiliary seat (150) upward against the seat (120).

5. The chair according to claim 4, wherein the rod (152) projected from a bottom surface of the auxiliary seat (150) is integrally formed with the auxiliary seat (150).

6. The chair according to claim 4, wherein the waist support (170) is pivotally coupled to the connecting frame (160) through a bracket (172) integrally formed with the waist support (170).