KR200461075Y1

KR200461075Y1 - Back supporting apparatus of a chair

Info

Publication number: KR200461075Y1
Application number: KR20090003250U
Authority: KR
Inventors: 정관영
Original assignee: 듀오백코리아 주식회사
Priority date: 2009-03-20
Filing date: 2009-03-20
Publication date: 2012-07-03
Also published as: KR20100009554U

Abstract

The present invention is to provide a back support device for a chair including a protective cover that can secure the safety and the flow trajectory of the back to the maximum while protecting the elastic fastener that supports the back elastically. To this end, the back support device of the chair of the present invention is provided with at least one back support for supporting the back, a back support for supporting the back, an elastic fastener provided between the back and the back support to provide elastic force to the back, and elastic A protective cover protecting the fastener. Here, the protective cover includes a protector positioned between the backplate and the backplate support to protect the elastic fasteners, and a fixing part for fixing the protector to the backplate or the backboard support. Here, the fixing part is made of a hard material, and the protection part is made of a soft material.

Chair, back, elastic, fasten, protect, soft

Description

Back support device of chair {BACK SUPPORTING APPARATUS OF A CHAIR}

The present invention relates to a back support device for a chair, and more particularly, to protect an elastic fastener that elastically supports the back, and a chair including a protective cover capable of maximally securing safety and flow trajectory of the back. It relates to a back support device.

Generally, the back support device of a chair is a device that supports a user's back, and is provided between a back support supporting a back, a back support supporting the back, and an elastic binding to provide elastic force to the back. And a protective cover secured to the sphere and the back support and protecting the elastic fastener. In particular, such back support devices comprising protective covers are mainly employed in student chairs.

However, the back support device of the conventional chair may have the following problems as the protective cover is made of a hard material.

A protective cover is used as a means to prevent damage to the elastic fasteners, but the space between the chairs placed back and forth in the narrow spaces such as classrooms or classrooms is narrow, so the ballpoint pen of the back person etc. Occasionally, the same writing instrument may be placed between the back and the protective cover. In this case, if the person in front of the back is excessively flipped, there may be a risk that they may be squeezed and damaged between the back and the protective cover. .

In addition, the back plate is rotated up / down, left / right and clockwise / counterclockwise rotation with the aid of the elastic fasteners, that is, the three-dimensional operation, if the protective cover is made of a hard material, the backing is protected Since the operation is limited by the cover, it may cause inconvenience to the user.

The present invention is to solve the problems with the prior art, the technical problem of the present invention is to provide a protective cover that can secure the safety and the flow trajectory of the back plate to the maximum while protecting the elastic fasteners that elastically support the back plate It is to provide a back support device for a chair that includes.

In order to achieve the above object, the back support device of the chair according to an embodiment of the present invention and at least one back plate for supporting the back; A back support for supporting the back; An elastic binder provided between the back plate and the back support to provide an elastic force to the back plate; And a protective cover for protecting the elastic fastener, wherein the protective cover is positioned between the back plate and the back support to protect the elastic fastener; And a fixing part fixing the protection part to the back plate or the back support, wherein the fixing part is made of a hard material, and the protection part is made of a soft material.

In addition, the elastic fastener and the first mounting portion provided in the fixing portion; Second and third mounting units positioned on both ends of the first mounting unit and provided on the back plate; And first and second elastic bodies provided between the first mounting portion and the second mounting portion, and between the first mounting portion and the third mounting portion, respectively, and the protecting portion includes the second mounting portion and the first mounting portion. An upper cover portion having a first flow space portion therein for allowing the elastic body to flow; And it may include a bottom cover portion having a second flow space portion therein so that the third mounting portion and the second elastic body, the fixing portion may be provided between the top cover portion and the bottom cover portion, The protective part may have a shape surrounding the outer part of the fixing part and may be combined with the fixing part.

The back support may have a rod shape and may include a horizontal support provided horizontally on the ground, and the at least one back includes first and second back plates respectively provided on the left and right sides of the horizontal support. The second and third mounting parts may be positioned in the up / down direction of each of the back plates, and the first and lower cover parts may be positioned up and down of the respective back plates to correspond to the second and third mounting parts. It may be located in the direction, and the fixing portion may have a shape surrounding a portion of the outer peripheral surface of the horizontal support.

In addition, the protective part of the hard material may be made of polypropylene (polypropylene, PP), the protective part of the soft material may be made of thermoplastic elastomers (Thermoplastics Elastomer, TPE), and in a single process through a double injection The fixing part may be molded and the protective part may be integrally welded to the outer part of the fixing part.

As described above, the back support device of the chair according to an embodiment of the present invention may have the following effects.

According to an embodiment of the present invention, even if the back plate is flipped in a state where an external object (such as a ball pen or the like) is caught between the back plate and the protective cover, safety may be secured such that the external object is not damaged.

In addition, according to an embodiment of the present invention, since the flow trajectory of the back is not limited by the protective cover, it is possible to maximize the user's comfort.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art may easily implement the present invention. However, the present invention may be embodied in many different forms and is not limited to the embodiments described herein.

1 is a rear perspective view showing a back support device and a protective cover included therein according to an embodiment of the present invention, and FIG. 2 is a side cross-sectional view of FIG. 1.

3 is a longitudinal cross-sectional view showing a protective cover made of a flexible material and a hard material fixing portion in the back support device of the chair according to an embodiment of the present invention.

The back support device of the chair according to an embodiment of the present invention, as shown in Figure 1 and 2, at least one back plate 100, back support 200, the elastic fastener 400, And a protective cover 700. Hereinafter, referring to FIGS. 1 to 3, each component of a back support device of a chair according to an embodiment of the present invention will be described in detail.

The at least one back plate 100 is a part directly contacting the back of the user, as shown in FIG. 1, the first back plate 110 and the second back plate respectively provided on the left and right sides of the back support 200. 120. In particular, in order to secure more contact surfaces with the back of the user, the cross-sections of the first and second backplates 110 and 120 may have a concave shape that goes back to the chair. In other words, although not shown, the shape of the virtual contact line placed in the transverse direction among the virtual surface contact lines when viewed from the front of each back plate 100 has a shape recessed into the rear of the chair. The shape may be formed symmetrically or asymmetrically based on a virtual contact line placed in the vertical direction at the center of each backplate 100.

More specifically, in order to properly support the lumbar spine of the user, as shown in FIGS. 1 and 2, the longitudinal sections of each of the first and second back plates 110 and 120 have a convex shape that is convex forward with respect to the chair. can do. In other words, although not shown, the shape of the virtual contact line lying in the vertical direction among the virtual surface contact lines when viewed from the front of each back plate 100 is convex protruding toward the front of the chair. In the first example, the virtual contact line placed in the direction may have a rounded shape such that its center section is round like the upper section and the lower section, and convex forwardly. It may have a straight shape and its upper and lower sections may be inclined toward the rear of the chair to have a convex shape as a whole. Therefore, according to the first and second examples, the upper part convex in each back plate 100 can support the load of the upper body of the user to reduce the load applied to the lumbar spine, and the lower part convex in each back plate 100 is the user's pelvis part. Close to the stress can relieve the stress.

As shown in FIG. 1, the back support 200 is mounted on a seat plate 10 (or a base (not shown) provided below the seat plate 10 and on which a tilting device (not shown) is mounted) and the seat plate ( 10 may include a vertical support part 210 positioned substantially perpendicular to the vertical support part 210, and a horizontal support part 220 provided on the vertical support part 210 and provided substantially horizontally on the seat plate 10. In particular, the first and second backplates 110 and 120 may be provided on the left and right sides of the horizontal support 220, respectively.

As shown in FIG. 2, the elastic fastener 400 is provided between the horizontal support part 220 and the back plate 100 to provide an elastic restoring force with respect to the support rotation of the back plate 320. Specifically, the elastic fastener 400 is positioned on both ends of the first mounting portion 410 and the first mounting portion 410 detachably provided in the horizontal support portion 220, respectively, the up / down direction of the back plate 100. And the second and third mounting parts 420 and 430 positioned in the back plate 100 and detachably provided between the first mounting part 410 and the second mounting part 420 and between the first mounting part 410 and the first mounting part 420. The first and second elastic bodies 440 and 450 may be provided between the three mounting units 430, respectively.

More specifically, one end of the first elastic body 440 is bonded to one end of the first mounting portion 410, and the other end of the first elastic body 440 is bonded to one end of the second mounting portion 420. One end of the second elastic body 450 is bonded to the other end of the first mounting part 410, and the other end of the second elastic body 450 is attached to one end of the third mounting part 430.

The first mounting portion 410 is coupled to the horizontal support portion 220, may be made of a hard synthetic resin material, the first coupling hole 411 may be formed therein. Therefore, the first bolt 530 is the first through hole 211 of the horizontal support portion 220, the second through hole 721 of the fixing portion 720 of the protective cover 700 to be described later, and the first coupling hole When sequentially fastened to 411, the horizontal support part 220, the fixing part 720, and the first mounting part 410 may be coupled to each other.

The second mounting portion 420 is coupled to the back plate 100, may be made of a hard synthetic resin material, and the second coupling hole 421 may be formed therein. Accordingly, when the third bolt 610 is sequentially fastened to the first coupling hole 630 formed in the second coupling hole 421 and the back plate 100, the back plate 100 and the second mounting part 420 may be coupled to each other. have.

The third mounting part 430 is coupled to the back plate 100 but positioned below the second mounting part 420, and may be made of a hard synthetic resin material, and a third coupling hole 431 may be formed therein. . Therefore, when the fourth bolt 620 is sequentially fastened to the second coupling hole 630 formed in the third coupling hole 431 and the back plate 100, the back plate 100 and the third mounting part 430 may be coupled. have.

Of course, as another example, if it is not necessary to consider the convenience of assembly (including convenience of replacement of parts later), the first, second and third mounting parts 410, 420, 430 described above are not necessarily used. The first and second elastic bodies 440 and 450 may be coupled by an adhesive (not shown). As another example, even when the first, second, and third mounting parts 410, 420, and 430 are not used, the back surface and the horizontal support part 220 of the back plate 100 are made of a metal material. The first and second elastic bodies 440 and 450 may be directly coupled to the rear surface of the back plate 100 by thermal fusion.

The protective cover 700 is to protect the elastic fastener 400, and as shown in FIGS. 2 and 3, the protective cover 700 is positioned between the back plate 100 and the horizontal support part 220 to provide the elastic fastener 400. A protection portion 710 to protect and a fixing portion 720 for fixing the protection portion 710 to the horizontal support portion 220 (or the back plate 100 as another example). In particular, the fixing part 720 is made of a hard material to properly support the protection part 710 to the horizontal support part 220 (or another example, the back plate 100), and the protection part 710 ) Is a problem described below (when the back plate 100 moves while the external object EO is sandwiched between the back plate 100 and the protective cover 700, the external object (by the protective cover 700 and the back plate 100). EO) and the problem that the flow trajectory of the back plate 100 is reduced by the protective cover 700, etc.] is made of a soft material.

In particular, the fixing part 720 and the protection part 710 may be formed integrally through a double injection. That is, as the fixing part 720 is molded in a single process through the double injection and the protection part 710 is welded integrally to the outside of the fixing part 720, problems caused when bonding with a general adhesive [protection The problem in which the part 710 and the fixing part 720 are easily separated by an external force, and a problem in that a time required for producing a product is delayed due to a separate process for bonding may be prevented. In general, as the double injection method, a mold rotation method, a core rotation method, a slide method, and the like are known.

Here, the flexible material forming the protective part 710 may include a resin material such as thermoplastic elastomer (TPE). In particular, since the thermoplastic elastomer has rubber-like elasticity and plastic-like molding processability, the problems described below (the backing 100 in a state where the external object EO is caught between the backing 100 and the protective cover 700) The external body EO is damaged by the protective cover 700 and the back plate 100, and the flow trajectory of the back plate 100 is reduced by the protective cover 700. In addition to being able to be solved by the elasticity of the branch, the dual injection with the fixing part 720 described above may be performed by the molding processability of the thermoplastic elastomer. Furthermore, in view of environmental protection, which is now considered globally important, thermoplastic elastomers may be advantageous as they can replace vinyl chloride and vulcanized rubber which cannot be recycled as they can be recycled.

In addition, the hard material forming the fixing part 720 may include a metal material or a resin material. In particular, it is preferable that polypropylene (Polypropylene, PP) is used as the hard resin material. For this reason, the polypropylene is capable of double injection with the thermoplastic elastomer (TPE), which is the material of the above-described protective part 710, and in view of environmental protection, it does not generate harmful toxic gas upon incineration. .

Hereinafter, the reason why the protective cover 700 should be divided into the hard fixing part 720 and the soft protecting part 710 will be described in more detail with reference to FIGS. 4 to 7.

4 is a back support device of a chair according to an embodiment of the present invention, when the back plate 100 is moved while the external object (EO) is sandwiched between the back plate 100 and the protective cover 700, the external object ( EO is not damaged and instead the protective portion 710 provided with a flexible material is a view showing a process of deforming by its elasticity, and Figure 5 is a protective cover 70, when the hard object, the external object (EO) When the back plate 100 moves in a state sandwiched between the temporary back plate 100 and the protective cover 70, the external object EO is damaged by the hard protective cover 70 and the back plate 100.

6 is a view showing a state in which the flow trajectory of the back plate 100 is increased by the protective portion 710 of the soft material in the back support device of the chair according to an embodiment of the present invention, and Figure 7 is a protective cover When the 70 is hard, the flow trajectory of the back plate 100 is limited by the hard protective cover 70.

First, when the entire protective cover 70 is made of a hard material, that is, when both the protective part 71 and the fixing part 72 are made of a hard material, as shown in FIG. 5, an external object EO (one example) When writing tools such as ballpoint pens are sandwiched between the back plate 100 and the protective cover 70, the back plate 100 is written backward (see an arrow), and the hard protective cover 70 and the back plate 100 are used. The external object EO may be damaged. In particular, when the external object E.O is made of a harder material than the protective cover 70, the protective cover 70 may be damaged or the flow trajectory of the back plate 100 may be limited by the external object E.O.

However, as shown in FIGS. 2 and 4, when the protective part 710 of the protective cover 700 is made of a soft material, the external object EO is formed on the back plate 100 and the protective cover 700. The external object EO is not damaged even when the back plate 100 is flipped backward in the interposed state. That is, when the back plate 100 is flipped back (see arrow), the force transmitted to the external object EO is transmitted to the protection unit 710, and the soft protection unit 710 received the force is also flipped back to deform. Therefore, the external object EO sandwiched between the back plate 100 and the protective part 710 will not be damaged, and there will be no problem even if a finger or the like gets caught between the back plate 100 and the protective cover 70. Thereafter, when the back plate 100 is positioned by the elastic fastener 400 described above, the protective cover 700 may also be restored to its original shape by its elasticity.

In addition, when the entire protective cover 70 is made of a hard material, that is, when both the protection part 71 and the fixing part 72 is made of a hard material, as shown in Figure 7, the back plate 100 is written backward When the hard protective cover 70 is touched (see arrow), the flow trajectory of the back plate 100 can be restricted by the protective cover 70 such that the back plate 100 is no longer written back. Ultimately, the comfort of the user may be limited by the limitation of the flow trajectory of the back plate 100.

However, as shown in FIGS. 2 and 6, if the protective part 710 of the protective cover 700 is made of a soft material, the soft protective part after the back plate 100 is written back (see arrow). Even if it touches 710, the back plate 100 continues to be rolled back while moving up to the flow allowable range of the elastic fastener 400, in which case the soft protection part 710 is also rolled back so that the back plate 100 Will continue to flip back. Ultimately, the flow trajectory of the backplate 100 is not limited by the protective cover 700, thereby maximizing user comfort.

On the other hand, the protection unit 710 described above is such that the second mounting portion 420 and the first elastic body 440 of the elastic fastener 400 is elastically movable with respect to the first mounting portion 410 in the center. An upper cover portion 711 providing a first flow space portion 711a therein, and the third mounting portion 430 and the second elastic body 450 are elastic with respect to the central first mounting portion 410. It may include a bottom cover portion 712 that provides a second flow space portion 712a therein to be flowable. Therefore, when the back plate 100 moves within the setting range, the second mounting portion 420 and the first elastic body 440 of the elastic fastener 400 moving according to the first flow space portion do not get caught by the protection portion 710. 711a may be smoothly moved, and the third mounting portion 430 and the second elastic member 450 of the elastic fastener 400 may also be smoothly moved through the second flow space 712a. Furthermore, when the protection part 710 includes the upper cover part 711 and the lower cover part 712, the center side end portions 711b and 712b of the protection part 710 on the back support 200 side. The fixing part 720 provided with a rigid material to be fixed in an up and down direction is provided between the upper cover part 711 and the lower cover part 712 made of a soft material, and the front surface of the elastic fastener ( It is formed to be coupled to the first mounting portion 410 of 400, the rear surface is formed to have a shape surrounding a portion of the outer peripheral surface of the horizontal support portion 200, and the upper end of the fixing portion 720 of a soft material And a position extending upward and downward from a lower end to cover the second mounting part 420 of the elastic fastener 400 from the upper and lower ends of the fixing part 720 and the third of the elastic fastener 400. Overall burnt to the position covering each of the mounting portion 430 The protection part 710 including the upper cover part 711 and the lower cover part 712 provided with the sexually deformable fluidity may have the fixing part so that a central portion of the protection part 710 surrounds the outer part of the fixing part 720. 720 is combined, and the protection part 710 of a soft material is integrally welded to the outside of the fixing part 720 while the fixing part 720 of a hard material is molded in a single process through a double injection The protective cover 700 may be integrally formed.

Furthermore, the above-described horizontal support part 220 may have a rod shape, and the fixing part 720 may have a shape surrounding a part of an outer circumferential surface of the horizontal support part 220. That is, the back surface of the fixing part 720 may have a shape protruding in a "⊂" shape for smooth coupling with the rod-shaped horizontal support part 220.

According to an embodiment of the present invention, the external object EO is not damaged even when the back plate 100 is flipped back while the external object EO is sandwiched between the back plate 100 and the protective cover 700. More safety can be ensured.

In addition, according to one embodiment of the present invention, since the flow trajectory of the back plate 100 is not limited by the protective cover 700 can maximize the user's comfort.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments or constructions. Of the right.

1 is a rear perspective view showing a back support device and a protective cover included in the chair according to an embodiment of the present invention.

2 is a side cross-sectional view of FIG. 1.

Figure 4 in the back support device of the chair according to an embodiment of the present invention, when the back plate is moved while the external object (writing instruments such as ballpoint pen) is sandwiched between the back plate and the protective cover, the external object is not damaged and instead soft A diagram showing a process in which a protective part of a material is deformed by its elasticity.

FIG. 5 is a view illustrating a process in which an external object is damaged by a hard protective cover and a back plate when the back cover moves while the outer cover is caught between the back plate and the protective cover when the protective cover is hard.

6 is a view showing a state in which the flow trajectory of the back plate is increased by the protective portion of the soft material in the back support device of the chair according to an embodiment of the present invention.

7 is a view showing a state in which the flow trajectory of the back plate is limited by the hard protective cover when the protective cover is hard.

DESCRIPTION OF THE REFERENCE NUMERALS

100: back 200: back support

400: elastic binder 700: protective cover

710: protection part 720: fixing part

Claims

A back support 200 having a rod shape and including a horizontal support part 220 provided horizontally on the ground;

A back plate 100 provided to support a back of a user and including a first back plate 110 and a second back plate 120 provided at left and right sides of the horizontal support part 220, respectively;

An elastic binding member 400 provided between the back plate 100 and the back support 200 to provide an elastic restoring force with respect to the support rotation of the back plate 100; And

In the support device such as a chair comprising a protective cover 700 for protecting the elastic fastener 400,

The protective cover 700,

A protection part 710 positioned between the back plate 100 and the back support 200 to be provided with a flexible material to protect the elastic fastener 400;

And a fixing part 720 provided on the back support 200 to be formed of a rigid material to fix the center end portions 711b and 712b of the protection part 710 in the vertical direction.

The elastic binder 400 is,

A first mounting part 410 formed to be coupled to a front surface of the fixing part 720 of the protective cover 700; A second mounting part 420 and a third mounting part 430 provided to be spaced apart from each other at upper and lower ends of the first mounting part 410 and positioned to be coupled to the rear surface of the back plate 100 in an up / down direction; The first elastic body 440 and the first elastic body 440 provided to elastically connect the first mounting part 410 and the second mounting part 420, and between the first mounting part 410 and the third mounting part 430. 2 comprises an elastic body 450, and

The protective part 710 constituting the protective cover 700 has the second mounting part 420 and the first elastic body 440 of the elastic fastener 400 to the first mounting part 410 in the center. An upper cover portion 711 providing a first flow space portion 711a therein so as to be elastically flowable relative to the inner portion; And a lower cover part providing a second flow space part 712a therein such that the third mounting part 430 and the second elastic body 450 are elastically movable with respect to the central first mounting part 410. 712), including

The fixing part 720 made of a hard material constituting the protective cover 700 is provided between the upper cover part 711 and the lower cover part 712 made of a soft material, the front surface is the elastic It is formed to be coupled to the first mounting portion 410 of the fastener 400, the rear surface is formed to have a shape surrounding a portion of the outer peripheral surface of the horizontal support portion 200, and

A position of covering the second mounting portion 420 of the elastic fastener 400 from the top and bottom of the fixing portion 720 is provided by extending in the vertical direction from the top and bottom of the fixing portion 720 in a soft material And the upper cover part 711 and the lower cover part 712 provided with elastic deformation flow as a whole up to a position covering the third mounting part 430 of the elastic fastener 400. The protection part 710 is combined with the fixing part 720 such that a central portion forms a shape surrounding the outer part of the fixing part 720, and the fixing part 720 made of a hard material is molded in one process through double injection. While the protective part 710 of the flexible material is integrally welded to the outside of the fixing part 720, the protective cover 700 is integrally formed with the back support device of the chair.

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