KR101995570B1 - A chair with waist support - Google Patents

Abstract

A chair having a waist support portion according to an embodiment of the present invention is formed between a seat back portion and a back portion for supporting a user's waist when the back portion is pushed back for rest, So that it can be used reliably and comfortably regardless of the user's body condition.

Description

A chair with waist support < RTI ID = 0.0 >

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a chair having a waist support, and more particularly, a waist support for supporting a user's waist when the back is lifted for resting is formed between the seat back and the backrest, So that the chair can be easily used.

Generally, widely used chairs, especially office chairs, have been used for a long time so that the backrest is turned backward for the occasional rest of the user. However, as the backrest is tilted backward, the backrest is turned backward, and the portion supporting the waist is disappeared. As a result, the user's waist becomes rather uncomfortable. In order to take a comfortable rest, an auxiliary cushion is put between the backrest and the waist of the user The auxiliary cushion can not be restored because the cushion is flattened by the load of the user when the auxiliary cushion is used for a long time, There is a problem in that a cost for replacement is generated.

In order to solve such a problem, the applicant of the present application has a backrest fixed to a backrest frame which is fixed to a backrest by a spring so as to be slidable rearwardly at a rear end of a base portion to which a leg portion is fixed at a lower portion and a left- The backrest is divided into a lower waist support portion and an upper back support portion so that the waist support portion of the divided lower portion of the back is projected upward by a waist height so as to extend upwardly from the rear end of the seat back portion, Characterized in that the backrest of the upper portion of the backrest is fixed to a backrest frame which is disposed close to the upper end of the waist support portion and whose lower end is tiltable rearwardly and resiliently supported by a spring. However, the chair is provided with an upper end portion of the waist supporting portion, The user who uses the chair which does not fit his / her body can not use the chair while using the chair because the user can not consider the height of the waist which is changed according to the physical condition of the user, There has been a problem that the user feels discomfort due to the waist support portion.

The applicant of the present invention has a backrest fixed to a back-receiving frame which is supported by a spring such that it can be inclined rearward at the rear end of a base portion where a leg portion is fixed to a lower portion and a left- Wherein the backrest is divided into a lower waist support portion and an upper back support portion and the lower waist support portion is protruded upward by a waist height so as to extend upward from the rear end of the seat back portion, Wherein the backrest portion of the backrest is fixed to an upper portion of the backrest plate fixed to the backrest frame and the backrest portion is protruded and formed so as to have the same outline as the entire contour of the backrest portion, And is protruded forwardly close to the upper end surface of the support portion, The chair support is provided with a waist support portion which is fixed to the lower extension portion of the downwardly extending backrest plate covered with the waist support portion. The waist support portion of the chair is divided in the lateral direction, The operation of the spring plate becomes unreliable when used for a long period of time, thereby failing to properly perform its role as a waist supporting portion.

Further, the angle of the waist support portion is not adjusted and the lumbar support can not be effectively supported.

Korean Patent Registration No. 10-0940190 (December 19, 2008)

It is an object of the present invention to solve such a conventional problem, and it is an object of the present invention to provide a waist support for supporting a waist of a user when the back is lifted for resting is formed between a seat back and a back, It is to provide a chair that can take a break.

In order to solve such a problem, the present invention provides a seat device for a vehicle, comprising a seat portion having a base portion to which a leg portion is fixed, a backrest portion having a lower extension portion which is fixed to the rear of the base portion, And a waist support portion formed at a rear end portion of the seat portion so as to be positioned between the seat portion and the backrest portion, wherein the waist support portion includes a waist support portion provided at a lower portion of the seat portion, And a supporting plate, to which a support cushion for supporting a waist of the user is coupled, is hinged and fixed at the end.

According to the present invention, the waist support portion includes an L-shaped portion having an insertion space formed by spacing a pair of hinge pieces through which hinge holes are passed, at an upper end of a main frame bent at the upper portion of an auxiliary support provided at a lower portion of the seat plate portion A hinge protrusion is formed on the back surface and a hooking surface of the hinge is hooked to one side of the backrest portion so as to be tilted when the backrest portion is tilted and tilted, And a support plate for restoring the backrest to its original position when the backrest is tilted at an angle.

According to the present invention, the waist supporting portion has a plurality of engaging holes formed on the front surface of the engaging plate formed at the center of the supporting plate, and a plurality of engaging projections engaging with the engaging holes are formed on the back surface of the supporting cushion.

A chair having a waist support unit according to an embodiment of the present invention is formed between a seat back and a backrest supporting a waist of a user when the backrest is pushed back for rest, Can have excellent effect.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a chair having a waist support portion according to the present invention. FIG.
2 is an exploded perspective view showing a chair having a waist support portion according to the present invention.
3 is an exploded perspective view showing a waist support portion of a chair having a waist support portion according to the present invention.
4A to 4C are sectional views showing an operating state of a chair provided with a waist support portion according to the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail with reference to the accompanying drawings. First, it should be noted that, in the drawings, the same components or parts have the same reference numerals as much as possible. In the following description of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted so as to avoid obscuring the subject matter of the present invention.

FIG. 1 is an exploded perspective view of a chair having a waist support portion according to the present invention, FIG. 3 is an exploded bottom perspective view of a chair having a waist support portion according to the present invention, and FIG. And FIGS. 4A to 4C are sectional views showing an operating state of a chair provided with a waist support portion according to the present invention.

1 to 3, a chair 10 having a waist support unit according to an embodiment of the present invention includes a seat plate 200 having a base unit 500 to which a leg 100 is fixed, 200 and a back extension part 330 which is fixed at the rear of the base part 500 and is supported by a lower extension part 330 which is elastically supported so as to be tiltable and a rear part 300 which is located between the left and right seat back parts 200, And a waist support 400 formed on the waist support 400.

The backrest 300 includes a lower extension 330 fixed to a rear portion of a base 500 disposed at a lower portion of the left plate 200 and elastically supported in a tilting manner and a backrest 600 having a headrest 600 for supporting a user's head, And a backrest 320 attached to the front of the backrest plate 310 and supporting the user's back.

In addition, the backing part 320 may have a mesh structure, but is not limited thereto.

In addition, the waist supporting part 400 is hinged to the upper end of the upright support board 430 installed at the lower part of the left board part 200 and hinged to the support plate 420 coupled with the support cushion 410 supporting the user's waist.

Further, the waist support 400 includes a support plate 420 hinged to the support plate 430.

Here, the support member 430 is formed of a main support 433 which is bent at an upper portion of the auxiliary support 431 provided at the lower portion of the left plate 200 and has an L shape.

In addition, an insertion space 437 is formed at the upper end of the main bearing zone 433 by separating a pair of hinge pieces 435 through which the hinge holes 439 are passed.

The support plate 420 is formed with a hinge protrusion 425 formed on the back surface thereof with a pivot hole 427 positioned in the insertion space 437 so that the support plate 420 is centered with the hinge hole 439.

At this time, the engagement surface 429 formed on the upper surface of the support plate 420 is hooked to one side of the backrest 300. That is, a latching space 313 is formed at one side of the backrest plate 310 of the backrest 300 so that the support plate 420 is positioned. An operating surface 311 is formed on the upper side of the engaging space 313 to selectively engage the engaging surface 429 of the supporting plate 420.

That is, when the backrest 300 is tilted, the support plate 420 interlocks with and tilts, and when the backrest 300 is tilted at an angle exceeding the elastic force of the support 430, the support 430 is returned to its original position.

A plurality of coupling holes 421 are formed on the entire surface of the coupling plate 421 formed at the center of the support plate 420, and a plurality of coupling projections 411 fitted to the coupling holes 421 are formed on the back surface of the supporting cushion 410 do.

In addition, a hinge protrusion 425 is provided on the back surface of the support plate 420, the hinge hole 439 at the upper end of the support plate 430 is aligned with the rotation hole 427 of the hinge protrusion 425, Further, the hinge cap 441 is joined to the end of the hinge shaft 440 and closed.

As a result, the support plate 420, which is hinged to the upper portion of the supporter 430, rotates about the hinge axis 440 by supporting the back of the user by resting the backrest for resting, so that the user rests comfortably .

As shown in FIGS. 4A to 4C, the chair 10 having the waist support unit according to an embodiment of the present invention having the above-described structure adjusts the height of the waist support unit 400 in accordance with the waist height of a user sitting on a chair The backrest 300, which is in contact with the back of the user, is tilted backward around the hinge shaft 340. In this case,

At this time, as shown in FIG. 4B, the waist support portion 400 supporting the waist of the user rotates together with the backrest portion 300.

Further, as shown in FIG. 4C, when the backrest 300 is tilted at an angle exceeding the elastic force of the support bar 430, the support bar 430 is returned to its original position.

That is, when the amount of tilting of the backrest 300 is increased, the support plate 430 does not rotate and the support plate 420 rotates about the hinge shaft 440 to support the waist of the user, so that the backrest 300 is bent back The user's back and back can be supported by the backrest 300 and the waist support 400 to rest comfortably.

As used herein, the terms "substantially", "substantially", and the like are used herein to refer to a value in or near the numerical value when presenting manufacturing and material tolerances inherent in the meanings mentioned, Absolute numbers are used to prevent unauthorized exploitation by unauthorized intruders of the mentioned disclosure.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the inventions. It will be clear to those who have knowledge of.

Description of the Related Art [0002]
10: chair with waist support
100: leg part 200: seat part
300: backrest part 400: waist support part
500: base portion 600: headrest

Claims (3)

A backrest portion having a base portion to which a leg portion is fixed and a lower extension portion which is fixed to a rear portion of the base portion disposed at a lower portion of the seat portion and is elastically supported so as to be tiltable; And a waist support portion formed at a rear end of the seat portion,
The waist support portion is hinged to a support plate coupled to a support cushion for supporting a user's waist at an upper end of a support base installed at a lower portion of the seat plate portion and bent upward,
The waist-
An L-shaped support having a pair of hinge pieces spaced apart from each other and having an insertion space formed at an upper end of a main frame bent at an upper portion of an auxiliary support provided at a lower portion of the seat plate;
A hinge protrusion is formed on the back surface and a hinge protrusion is formed on a back surface of the hinge hole so that the hinge hole and the center of the hinge hole coincide with each other and a hooking surface of the hinge protrusion is hooked on one side of the backrest portion to be tilted when the backrest portion is tilted, And a support plate for restoring the support member to an original position when tilting.
delete The method according to claim 1,
The waist-
Wherein a plurality of coupling holes are formed on a front surface of the coupling plate formed at the center of the support plate, and a plurality of coupling projections, which are fitted to the coupling holes, are formed on the back surface of the support cushion.

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