KR20100009554U - Back supporting apparatus of a chair - Google Patents

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. A first convex portion having a first flow space therein for allowing the elastic body to flow; And a second convex portion having a second flow space portion therein to allow the third mounting portion and the second elastic body to flow therein, and the fixing portion may be provided between the first convex portion and the second convex portion. And, the protection portion may be coupled to the fixing portion and has a shape surrounding the outer portion of the fixing portion.

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 portions may be positioned in the up / down direction of each of the back plates, and the first and second convex portions may correspond to the second and third mounting portions. It may be located in a downward 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 (PP), the protective part of the soft material may be made of thermoplastic elastomer (TPE), and once through the double injection The fixing part may be molded in the process of, and the protective part may be integrally welded to the outside 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. As those skilled in the art would realize, the described embodiments may be modified in various different ways, all without departing from the spirit or scope of the present invention.

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 elasticity to 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 portion 720 may be made of a hard material to properly support the protection portion 710 to the horizontal support portion 220 (or another example, the back plate 100), and the protection portion ( 710 is a problem to be described later (external object EO is caught between the back cover 100 and the protective cover 700 when the back plate 100 is moved between the external cover by the protective cover 700 and the back plate 100) (EO) damage, and the problem that the flow trajectory of the back plate 100 is reduced by the protective cover 700, etc.] may be made of a soft material (soft).

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 shows a process in which the flexible portion 710 of the flexible material is deformed by its elasticity, and FIG. 5 shows that when the protective cover 70 is hard, the external object EO is climbed. When the back plate 100 moves in a state sandwiched between the 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.

Meanwhile, the above-described protection part 710 may include a first convex portion 711 having a first flow space portion 711a, and a second convex portion 712 having a second flow space portion 712a. Can be. 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 first convex part 711 and the second convex part 712, the fixing part 720 is disposed between the first convex part 711 and the second convex part 712. Is provided in, and the protection unit 710 has a shape surrounding the outer portion of the fixing unit 720 and may be welded with the fixing unit 720.

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.

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, 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.

Although the preferred embodiment of the present invention has been described in detail above, the scope of the present invention is not limited thereto, and various modifications and improvements of those skilled in the art using the basic concept of the present invention defined in the following claims are also provided. It belongs to the scope of rights.

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.

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.

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.

Explanation of symbols for main parts of the drawings

100: back 200: back support

400: elastic binder 700: protective cover

710: protection part 720: fixing part

Claims (4)

At least one back plate 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 It includes a protective cover for protecting the elastic fastener, The protective cover A protection part positioned between the back plate and the back support to protect the elastic fastener; And a fixing part for fixing the protection part to the back plate or the back support, The fixing part is made of a hard material, and The protector is a back support device of a chair made of a soft material. In claim 1, The elastic fastener is A first mounting part provided in the fixing part; 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. The protection part A first convex portion having a first flow space portion therein for allowing the second mounting portion and the first elastic body to flow; And a second convex portion having a second flow space portion therein to allow the third mounting portion and the second elastic body to flow therethrough, The fixing portion is provided between the first convex portion and the second convex portion, and The protector has a shape surrounding the outside of the fixing part and the back support device of the chair coupled to the fixing part. In claim 2, The back support has a rod shape and includes a horizontal support provided horizontally on the ground, The at least one back plate includes a first back plate and a second back plate respectively provided on the left side and the right side of the horizontal support part, The second and third mounting portion is located in the up / down direction of each back plate, The first and second convex portions are located in the up / down direction of each back plate so as to correspond to the second and third mounting portions, and The fixing part is a back support device of a chair having a shape surrounding a portion of the outer peripheral surface of the horizontal support. The method according to any one of claims 1 to 3, The fixing portion of the hard material is made of polypropylene, The protective part of the flexible material is made of a thermoplastic elastomer, and The back support device of the chair through the double injection molding the fixing portion in one process and the protective portion is integrally welded to the outside of the fixing portion.

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