KR101917582B1 - A chair including a backrest with tension - Google Patents

Abstract

The present invention relates to a chair in which a backrest can come into close contact with a user′s back part when the user is seated. A chair according to the present invention includes a tension backrest including a tension portion for providing a pressing force such that a lower side of the backrest moves forward from a lower side of the backrest, a rotary bracket rotatable about a first hinge shaft and a second hinge shaft in accordance with an interval of the backrest with respect to the rear bracket, wherein the rotary bracket includes a pair of rotary links having one end which is hinged to a first hinge bracket to be rotatable by the first hinge shaft, and an opposite end which is hinged to a second hinge bracket provided on a rear bracket to be rotatable by a second hinge shaft, and an operating protrusion integrally formed to connect between the pair of rotary links and protruding toward the rear bracket; an elastic coil spring shaft-inserted into the hinge shaft of at least one of the first and second hinge shafts and providing an elastic pressing force such that the lower side of the backrest moves forward as the rotary bracket rotates; and a step adjustment dial having an inner end which is rotationally provided on the rear bracket to face the operating protrusion of the rotary bracket, and a multi-stepped portion which has mutually different protruding heights and is formed on the inner end portion in a circular array, wherein the step adjustment dial is configured to allow one of the multi-stepped portion to alternatively face the operating protrusion.

Description

A chair including a backrest with tension < RTI ID = 0.0 >

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a chair provided with a tension plate, and more particularly, to a chair provided with a tension plate on which a back plate can be brought into close contact with a user's back part when the user is seated.

A general chair includes a seat portion for supporting the user's buttocks, a leg for supporting the seat portion, a backrest provided at the back of the seat portion for supporting the back of the user, a frame for organically connecting and supporting the seat portion, .

On the other hand, when the user sits on the chair, the backrest can be closely attached to the back of the user so that the seating feeling can be enhanced. In the conventional chair, when the seated person presses back the backrest, It is a structure in which adhesion is made.

However, the above-mentioned conventional chair has a limitation in allowing the back plate to come into close contact with the back part of the user when the user sits on the chair.

In addition, since the body structure is different for each user, it is required to have a structure in which the user can smoothly come into close contact with the back of the user when the user is seated.

Registration No. 10-0791451 (Registration date December 27, 2007)

SUMMARY OF THE INVENTION An object of the present invention is to provide a chair provided with a tension plate that can adjust the degree of tension in a stepwise manner, .

In order to solve the above-described technical problem, a chair provided with a tension plate according to the present invention comprises: a rear bracket, one side of which is supported by a seat plate and the other side of which is extended away from the rear of the back plate; And a tension portion for providing a pressing force to move the lower side of the back plate forward from a lower side of the back plate, wherein the tension portion includes a lower portion and a lower portion of the back plate, A rotation unit hinge-connected to the rear brackets, respectively, and operating protrusions protruding toward the rear brackets; An elastic part providing an elastic pressing force such that a lower side of the back plate moves forward; And a step adjuster rotatably mounted on the rear bracket such that an inner end thereof faces the operating protrusion of the rotary part, and the inner end of the step adjuster has a plurality of stepped portions having different projecting heights.

Preferably, the pivoting portion is hinged to one end of the first hinge bracket by a first hinge axis, and the other end is connected to a second hinge bracket provided on the rear bracket, A pair of pivotal links hingably pivotable by the pivot bracket, and an operation protrusion integrally formed to connect between the pair of pivotal links and protruding toward the rear bracket, And a pivot bracket that pivots about the first hinge axis and the second hinge axis in accordance with the first hinge axis and the second hinge axis.

Preferably, the elastic portion is axially inserted into at least one of the hinge shafts of the first hinge shaft and the second hinge shaft, and provides elastic pressing force such that the lower side of the back plate moves forward as the rotation bracket rotates And a coiled elastic spring for applying a force to the coil spring.

Preferably, the step adjuster is rotatably provided on the rear bracket such that an inner end of the step adjuster faces the operating protrusion of the pivot bracket, and a stepped portion having a different height of protrusion is formed on the inner end of the step adjuster, And a step adjustment dial configured to selectively face one of the stepped portions of the multi-stepped portion in accordance with the change of the angle with the operation protrusion.

Preferably, a stopper projection for limiting a range in which the lower side of the back plate is moved forward is integrally formed at the other end of the pivot link, and a stopper block may be provided at a corresponding portion of the rear bracket corresponding to the stopper projection have.

Preferably, the step adjustment dial includes an inner multi-stage component provided inside the rear bracket to integrally form the multi-stage jaw part, and an outer knob part integrally formed with the inner multi-stage component through the rear bracket, .

Preferably, the step adjustment dial further comprises: a coil spring inserted into a spring insertion groove formed on an inner surface of the outer handle part; A step-determining ball supported on an outer side of the coil spring; And a plurality of step-determining grooves formed to be equiangularly disposed on the corresponding surfaces of the rear brackets facing the inner side surfaces of the outer handle member, wherein the step-determination balls are inserted into at least one of the plurality of step- The rotation of the outer knob part can be adjusted in a stepwise manner.

Preferably, the rail guide incorporated in both side portions of the other end of the rear bracket; And a support stopper configured to be slidable along the rail guide and to limit a range in which the upper side of the back plate is elastically deformed rearward as the rail guide is fixed at one point of the rail guide .

Preferably, the rail guide includes: a slot hole formed in an elongated direction; And a plurality of step grooves formed at equal intervals on the slot hole, wherein the support stopper includes a sliding circular block slidably inserted in one of the plurality of step grooves, ; And a support block having one side integrally assembled with the sliding circular block and the other side extending to abut the upper surface of the back plate.

Preferably, the sliding circular block is formed with a fastening hole to be assembled with the support block, and elastically deformed grooves may be formed on both sides of the outer circumference.

Preferably, a plurality of guide protrusions are formed on the upper surface of the back plate along the sliding direction of the support stopper, and an insertion protrusion inserted between the plurality of guide protrusions may be formed on the other side of the support block.

The present invention as described above provides an effect that the back plate can be brought into close contact with the user's back part when the user is seated, and in particular, the degree of tension can be adjusted in a stepwise manner.

The effects of the present invention are not limited to the effects mentioned above, and other effects not mentioned can be clearly understood by those skilled in the art from the following description.

1 is a perspective view illustrating a chair provided with a tension plate according to an embodiment of the present invention.
FIG. 2 is a partially exploded perspective view of a chair having a tension plate according to an embodiment of the present invention; FIG.
3 is a partial enlarged view of Fig.
FIG. 4 is an exploded perspective view showing a disassembled state of a step adjusting dial constituting a chair provided with a tension back plate according to an embodiment of the present invention.
5 is a partial cross-sectional view illustrating a chair having a tension back plate according to an embodiment of the present invention.
6 is a cross-sectional view illustrating a one-step tension operation of a chair provided with a tension back plate according to an embodiment of the present invention.
7 is a cross-sectional view illustrating a two-stage tension operation of a chair provided with a tension back plate according to an embodiment of the present invention.
8 is a cross-sectional view illustrating a three-step tension operation of a chair provided with a tension back plate according to an embodiment of the present invention.
9 is a cross-sectional view illustrating a four-step tension operation of a chair provided with a tension back plate according to an embodiment of the present invention.
10 is an exploded perspective view showing a decomposed state of a rail guide and a support block on a back plate of a chair provided with a tension back plate according to an embodiment of the present invention.
11 is a partially enlarged view of Fig.
FIG. 12 is a cross-sectional view showing a state in which an upper part of a back plate of a chair provided with a tension back plate according to an embodiment of the present invention is capable of being tensioned.
FIG. 13 is a cross-sectional view showing a state in which the upper part of the back plate of the chair provided with the tension back plate according to the embodiment of the present invention is not able to be tensioned by the deformation.

The present invention may be embodied in many other forms without departing from its spirit or essential characteristics. Accordingly, the embodiments of the present invention are to be considered in all respects only as illustrative and not restrictive.

The terms first, second, etc. may be used to describe various components, but the components should not be limited by the terms.

The terms are used only for the purpose of distinguishing one component from another. For example, without departing from the scope of the present invention, the first component may be referred to as a second component, and similarly, the second component may also be referred to as a first component.

And / or < / RTI > includes any combination of a plurality of related listed items or any of a plurality of related listed items.

It is to be understood that when an element is referred to as being "connected" or "connected" to another element, it may be directly connected or connected to the other element, .

On the other hand, when an element is referred to as being "directly connected" or "directly connected" to another element, it should be understood that there are no other elements in between.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The singular expressions include plural expressions unless the context clearly dictates otherwise.

In this application, the terms 'comprise', 'comprising', 'having', and the like are intended to specify that there is a feature, a number, a step, an operation, an element, a component, Steps, operations, elements, components, or combinations of elements, numbers, steps, operations, components, parts, or combinations thereof.

Unless defined otherwise, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.

Terms such as those defined in commonly used dictionaries are to be interpreted as having a meaning consistent with the contextual meaning of the related art and are to be interpreted as either ideal or overly formal in the sense of the present application Do not.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings, wherein like or corresponding elements are denoted by the same reference numerals, and a duplicate description thereof will be omitted.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

As shown in FIG. 1, a chair provided with a tension plate according to an embodiment of the present invention includes a seat 10 for supporting the buttocks of a user, a seat 10 provided at the back of the seat 10, And a rear bracket 30 for supporting the back plate 10 and the back plate 20 by organically connecting and supporting them.

1, the rear bracket 30 is configured such that one side is supported on the lower side of the seat 10 and the other side is extended to the rear side of the backboard 20, The back plate 20 may be bent at a substantially right angle so as to be connected to each other, and may be constituted of one component or a structure in which a plurality of components are assembled.

Particularly, a corresponding portion of the rear bracket 30 extending to the rear of the back plate 20 extends in a state of being spaced apart from the back plate 20 by a predetermined distance, and an end of the bracket 30 is supported by a support (40).

2 and 10, the supporting portion 40 is a portion that allows the back plate 20 to be supported by the rear bracket 30 and protrudes rearward at the upper center of the back plate 20 And a fastening means 42 such as a bolt fastened to the connection block through the upper center of the rear bracket 30.

The back plate 20 is made of synthetic resin such as plastic and the connecting block 41 is formed integrally with the back plate 20 so that the back plate 20 can be made of the same material as the back plate 20. [

And a tension unit 100 for providing a pressing force to move the lower side of the back plate 20 forward from the lower side of the back plate 20. The tension unit 100 includes a lower portion of the back plate 20, And the bracket 30 is connected.

2, the tension unit 100 includes a rotation bracket 110 constituted by a rotary part, a coil elastic spring 120 constituted by an elastic part, a step adjustment dial composed of a step adjustment part 130).

The pivotal bracket 110 includes a pair of pivotal links 110a and an operation protrusion 113.

One end of the pivotal link 110a is hingedly connected to a first hinge bracket 111a provided on the back plate 20 so as to be rotatable by a first hinge shaft 111b and the other end is connected to the rear bracket 111b The second hinge bracket 112a is rotatably hinged to the second hinge bracket 112b by a second hinge shaft 112b.

The operating protrusion 113 is integrally formed to connect between the pair of pivotal links 110a and protrudes toward the rear bracket 30. [

As shown in FIG. 5, the height of the second hinge bracket 112a is higher than the height of the first hinge bracket 111a, so that the pivot bracket 110 is preferably installed in an inclined form Do.

6 to 9, according to the distance between the back plate 20 and the rear bracket 30, the first hinge axis 111b and the second hinge axis 110b may be spaced apart from each other, The pivot bracket 110 rotates about the axis 112b so that the operation protrusion 113 is moved toward or away from the rear bracket 30.

3 and 5, in order to provide an elastic pressing force such that the lower side of the back plate 20 moves forward, the first hinge shaft 111b and the second hinge shaft 112b At least one of the hinge shafts is provided with a coil elastic spring 120.

In this embodiment, the coil spring 120 is provided on the second hinge axis 112b, and the rotation bracket 110 is elastically rotated by the coil elastic spring 120, 20 to move forward.

For example, as shown in the upper diagram of Fig. 9, in a state where the user is not seated on the chair, the state in which the back plate 20 is moved forward is maintained, and as shown in the lower side of Fig. 9, When the user sits on the chair and pushes the back plate 20 backward, the coil spring 120 is compressed and the back plate 20 elastically moves toward the rear side. By this elastic force, the back plate 20 So that it can be effectively adhered to the back portion of the user.

The step adjustment dial 130 is a component for stepwise adjusting the degree to which the back plate 20 is pushed rearwardly. As shown in FIGS. 2 and 5, the inner end of the step adjustment dial 130 is operated by the operation of the pivot bracket 110 And is rotatable in a state of passing through the rear bracket 30 so as to face the projection 113.

Specifically, the step adjustment dial 130 includes an inner multi-step part 131 provided inside the rear bracket 30, and an inner multi-step part 130 integrally fastened to the inner multi-step part 131 through the rear bracket 30, The outer handle 133 can be divided into two parts.

As shown in FIG. 3, the inner end portions of the inner cascaded parts 131 have circular protrusions 131a to 131d having different protruding heights, and the protrusions 131a to 131d are formed in a circular array, 131d may alternatively face the actuating protrusion 113. In this case,

A coil spring 133s is inserted into the spring insertion groove 133h and a coil spring 133s is inserted into the coil spring 133s on the outer side of the coil spring 133s. (133-1).

4, a plurality of step-determining grooves 31 are formed on the corresponding surface of the rear bracket 30 facing the inner surface of the outer knob part 133 at equal angles, The plurality of step-determination grooves 31 may be formed in the same number as the number of the multi-stepped portions 131a to 131d formed in the inner multi- In this embodiment, four step-determining grooves 31 are formed at intervals of 90 degrees.

According to the configuration of the step adjustment dial 130 configured as described above, the stepped ball 133-1 is inserted and positioned in any one of the plurality of stepped grooves 31 by the coil spring 133s The rotation of the outer knob part 133 can be adjusted in steps. That is, the step adjustment dial 133 and the coil spring 133s can step-adjust the step adjustment dial 130 at intervals of 90 degrees.

The operation of the step adjustment dial 130 according to the rotation is as follows.

6, in a state where the first step 131a is adjusted so as to face the actuating projection 113, even if the user is seated on the chair and pushes the back plate 20 backward, The end of the operation protrusion 113 formed on the bracket 110 is in contact with the first step 131a so that the back plate 20 can not move backward.

Next, as shown in FIG. 7, when the user is seated on the chair and pushes the back plate 20 backward in a state where the two-stepped portion 131b is adjusted in two stages so as to face the operation protrusion 113, The back plate 20 can be moved backward until the end of the operating projection 113 formed on the pivot bracket 110 touches the second step jaw portion 131b and the first jaw portion 131a and the second step And can be moved by a length corresponding to the step of the jaw 131b.

Next, as shown in FIG. 8, when the user is seated on the chair and pushes the back plate 20 backward in a state where the three-step jaw portion 131c is adjusted in three stages so as to face the operation protrusion 113, The back plate 20 can be moved backward until the end of the operating projection 113 formed on the pivot bracket 110 touches the third step jaw portion 131c and the first jaw portion 131a and the third stage And can be moved by a length corresponding to the step of the jaw portion 131c.

9, when the user is seated on the chair and pushes the back plate 20 backward in a state where the four-step jaw portion 131d is adjusted in four stages so as to face the operation protrusion 113, The back plate 20 can move backward until the end of the operation protrusion 113 formed on the pivot bracket 110 touches the four-step jaw portion 131d, and the first step jaw portion 131a and the four- And can be moved by a length corresponding to the step of the jaw 131d.

5, a stopper projection 114, which restricts the range in which the lower side of the back plate 20 is moved forward, is integrally formed with the other end of the pivot link 110a of the pivot bracket 110, And a stopper block 34 is provided at a corresponding portion of the rear bracket 30 corresponding to the stopper projection 114. [

The stopper protrusion 114 is formed in a state where the step dial 130 is adjusted to one end so that the end of the actuating protrusion 113 formed on the pivot bracket 110 is in contact with the first step 131a, It is preferable to limit the rotation of the pivotal link 110 to the stopper block 34 so as not to rotate.

10 and 11, in order to adjust the degree of tension on both sides of the upper side of the back plate 20, a rail guide 200 built in both sides of the other end of the rear bracket 30, And a support stopper 300 configured to slide along the rail guide 200.

The rail guide 200 extends in the right and left directions of the back plate 20 and is provided with a slot hole 210 formed in an extended direction. On the other hand, a plurality of step grooves 211 are formed at equal intervals on the slot hole 210.

Specifically, the slot hole 210 is formed in a shape in which a wide width slot hole 210-1 and a narrow narrow slot hole 210-2 are extended while extending in the longitudinal direction, The groove 211 is formed in the wide slot hole 210-1.

The support stopper 300 is a component that restricts the range in which the upper side of the back plate 20 is elastically deformed rearward as it is fixed at one point of the rail guide 200, A sliding circular block 310 which is slid along one of the plurality of step grooves 211 and is selectively inserted into and fixed to one of the plurality of step grooves 211 and a sliding circular block 310 whose one side is assembled integrally with the sliding circular block 310, And a support block 320 extending to abut the upper surface of the support block 20.

Meanwhile, the sliding circular block 310 is formed at its center with a fastening hole 310h1 to be assembled with the support block 320, and elastically deformed grooves 310h2 are formed on both sides of the outer periphery thereof. Accordingly, the sliding circular block 310 is easily deformed by the elastic deformation groove 310h2, and can be easily moved to the adjacent step groove 211. [0050]

A plurality of guide protrusions 22 extend along the sliding direction of the support stopper 300 on the upper surface of the back plate 20. A plurality of guide protrusions 22 The support block 320 can be stably moved without being detached by the guide protrusion 32 and the insertion protrusion 321. As a result,

The sliding circular block 310 of the support stopper 300 slides along the slot hole 210 and is inserted into any one of the plurality of step grooves 211 to be fixed So that the upper side of the back plate 20 is prevented from being elastically deformed rearward at the corresponding position.

12, when the support stopper 300 is positioned in the step groove 211 formed on the innermost side of the rail guide 200, the upper left and right portions of the back plate 20 The support stopper 300 is positioned in the step groove 211 formed on the outermost side of the rail guide 200 as shown in FIG. The left and right portions of the upper side of the back plate 20 are supported by the support stopper 300 and the elastic deformation is not achieved.

Although the present invention has been described with reference to the preferred embodiments thereof with reference to the accompanying drawings, it will be apparent to those skilled in the art that many other obvious modifications can be made therein without departing from the scope of the invention. Accordingly, the scope of the present invention should be interpreted by the appended claims to cover many such variations.

10: seat plate 20: back plate
22: guide projection 30: rear bracket
31: step determination groove 34: stopper block
40: support part 41: connecting block
42: fastening means 100:
110: rotating bracket 111a: first hinge bracket
111b: first hinge shaft 112a: second hinge bracket
112b: second hinge shaft 113: operating projection
114: stopper projection 120: coil elastic spring
130: step adjustment dial 131: inner stepped part
131a to 131d: multi-step jaw portion 133: outer handle portion
133-1: Step determination ball 133h: Spring insertion groove
133s: coil spring 200: rail guide
210: slot hole 211: step groove
300: Support stopper 310: Sliding circular block
310h1: fastening hole 310h2: elastic deformation groove
320: Support block 321: Insertion projection

Claims (11)

A rear bracket which is supported by the seat on one side and extends on the rear side of the back plate; a supporting part provided between the upper side of the back plate and the rear bracket to support the back plate; And a tension portion for providing a pressing force to move the lower side forward, the chair comprising:
The tension unit
A rotation unit hinge-connected to a lower side of the back plate and the rear bracket, respectively, and an operation protrusion protruding toward the rear bracket;
An elastic part providing an elastic pressing force such that a lower side of the back plate moves forward; And
And a step regulating portion rotatably provided on the rear bracket so that an inner end thereof faces the operating protrusion of the rotary portion, wherein the step regulating portion has a stepped portion having a plurality of protruding heights different from each other at the inner end portion A chair. The method according to claim 1,
The pivoting portion,
The first hinge bracket being hingedly connected to the first hinge bracket provided on the back plate so as to be rotatable by the first hinge shaft and the other end being hingedly connected to the second hinge bracket provided on the rear bracket by the second hinge shaft A pair of pivotal links, and an operation protrusion integrally formed to connect between the pair of pivotal links and protruding toward the rear bracket, wherein the first hinge axis and the second hinge axis are formed along the interval of the back plate relative to the rear bracket, And a pivot bracket that pivots about a second hinge axis. 3. The method of claim 2,
The elastic portion
And a coil spring spring inserted into the hinge shaft of at least one of the first hinge shaft and the second hinge shaft and providing an elastic pressing force such that the lower side of the back plate moves forward as the pivot bracket rotates And the chair is provided with a tension release plate. The method of claim 3,
The step-
And the inner end portion of the rotary bracket is rotatably mounted on the rear bracket so as to face the operating protrusion of the rotary bracket, and the inner end portion is formed with a circular array of multi-stepped portions having different protruding heights, And a step adjustment dial configured so that any one of the first and second protrusions may alternatively face the operating protrusion. 5. The method of claim 4,
Wherein a stopper projection for limiting a range in which the lower side of the back plate is moved forward is integrally formed at the other end of the pivot link and a stopper block is provided at a corresponding portion of the rear bracket corresponding to the stopper projection Chair with tension plate. 5. The method of claim 4,
Wherein the step adjustment dial comprises:
And an inner knob part provided on the inner side of the rear bracket and integrally formed with the multi-step jaw part and an outer knob part penetrating through the rear bracket and integrally fastened with the inner multi-step part. chair. The method according to claim 6,
Wherein the step adjustment dial comprises:
A coil spring inserted into a spring insertion groove formed on an inner side surface of the outer knob part;
A step-determining ball supported on an outer side of the coil spring;
And a plurality of step-determining grooves formed on the corresponding rear surface of the rear bracket facing the inner surface of the outer handle part,
Wherein the rotation of the outer knob part is adjusted in a stepwise manner as the step crystal ball is inserted into at least one of the plurality of step-determination grooves. 5. The method of claim 4,
A rail guide built in both sides of the other end of the rear bracket;
And a support stopper configured to be slidable along the rail guide and to limit a range in which the upper side of the back plate is elastically deformed rearward as the rail guide is fixedly positioned at one point of the rail guide. Chair with a tension plate. 9. The method of claim 8,
The rail guide
A slot hole formed in an elongated direction; And a plurality of step grooves formed at equal intervals on the slot hole,
The support stopper
A sliding circular block which is slid along the slot hole and is selectively engaged with any one of the plurality of step grooves; And a support block which is integrally assembled with the sliding circular block on one side and extends so as to abut the upper surface of the back plate on the other side. 10. The method of claim 9,
The sliding circular block includes:
Wherein a locking hole to be assembled with the supporting block is formed at a central portion, and elastically deformed grooves are formed at both sides of the outer periphery. 10. The method of claim 9,
Wherein a plurality of guide protrusions are formed on the upper surface of the back plate along the sliding direction of the support stopper and insertion protrusions are formed on the other side of the support block to be inserted between the guide protrusions. A chair.

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