Chair having abdominal support band function

Abstract

The present invention relates to a chair having an abdominal support band function, the chair comprising: a chair body including a seat on which a sitter is seated and a backrest which is coupled to the seat and supports the back of the sitter; and a wearing part which is detachably coupled to the backrest, is worn on the upper body of the sitter, and generates an elastic force for bringing the upper body of the sitter into close contact with the backrest to cause the sitter to straighten himself / herself.

Description

Chair with a backrest function

[0001] The present invention relates to a chair having a backrest function.

[0002] In modern society, people spend more and more time sitting in chairs, which leads to an increase in the incidence of diseases that cause back pain, such as herniated discs.

[0003] To prevent and alleviate this type of back pain, the person sitting on the chair must maintain proper posture. This proper posture means keeping the back straight.

[0004] However, there is a problem that it is not easy for a person sitting to maintain the correct posture (e.g., with the back extended) for a long time.

[0005] The present invention has been made to solve the above-mentioned problems, and the purpose of the present invention is to provide a chair having a waist belt function that forcibly extends the waist of a seated person, thereby enabling a seated person to maintain a correct sitting posture on a chair for a long time, preventing the seated person from having back pain, and improving the seated person's back pain.

[0006] The problems to be solved by the present invention are not limited to the problems mentioned above, and other problems not mentioned will be clearly understood by those skilled in the art from the description below.

[0007] A chair having a waist belt function according to one embodiment of the present invention comprises: a chair body having a seat on which a seated person sits; a backrest coupled to the seat and supporting the back of the seated person; and a wearing part detachably coupled to the backrest and worn on the upper body of the seated person to bring the upper body of the seated person into close contact with the backrest, thereby generating an elastic force that extends the waist of the seated person.

[0008] In addition, the wearing part may include a first wearing part including a first connecting part connected to an upper portion of the backrest, a first Velcro part detachably connected to an upper portion of the backrest, and a first elastic part connecting the first connecting part and the first Velcro part and being worn on a chest of a seated person and generating an elastic force to press the chest of the seated person against the backrest; and a second wearing part including a second connecting part connected to a lower portion of the backrest, a second Velcro part detachably connected to a lower portion of the backrest, and a second elastic part connecting the second connecting part and the second Velcro part and being worn on an abdomen of a seated person and generating an elastic force to press the waist of the seated person against the backrest.

[0009] Additionally, the first elastic portion may have a smaller elastic modulus than the second elastic portion.

[0010] In addition, the first Velcro portion may include a first main Velcro detachably coupled to the upper portion of the backrest; and a first auxiliary Velcro provided along a predetermined section of the first elastic portion and detachably coupled to the first main Velcro, and the second Velcro portion may include a second main Velcro detachably coupled to the lower portion of the backrest; and a second auxiliary Velcro provided along a predetermined section of the second elastic portion and detachably coupled to the second main Velcro.

[0011] In addition, the first connecting portion may include a first base provided on the upper portion of the backrest; and a first sewing portion sewn to the first base and connected to the first elastic portion, and the second connecting portion may include a second base provided on the lower portion of the backrest; and a second sewing portion sewn to the second base and connected to the first elastic portion.

[0012] In addition, the wearing part may include a third wearing part including a strap into which the backrest is inserted; a third main elastic part coupled to one upper side of the strap, a third auxiliary elastic part coupled to the other upper side of the strap, and a third Velcro part that detachably couples the third main elastic part and the third auxiliary elastic part; and a fourth wearing part including a fourth main elastic part coupled to one lower side of the strap, a fourth auxiliary elastic part coupled to the other lower side of the strap, and a fourth Velcro part that detachably couples the fourth main elastic part and the fourth auxiliary elastic part.

[0013] Additionally, the third main elastic part and the third auxiliary elastic part may have an elastic modulus smaller than that of the fourth main elastic part and the fourth auxiliary elastic part.

[0014] In addition, the third Velcro portion includes a third main Velcro coupled to the third main elastic portion; and a third auxiliary Velcro provided along a predetermined section of the third auxiliary elastic portion and detachably coupled to the third main Velcro, and the fourth Velcro portion includes a fourth main Velcro coupled to the fourth main elastic portion; and a fourth auxiliary Velcro provided along a predetermined section of the fourth auxiliary elastic portion and detachably coupled to the fourth main Velcro, and the third main elastic portion and the third auxiliary elastic portion are worn on the chest of the seated person to generate an elastic force that compresses the chest of the seated person to the backrest, and the third main elastic portion and the third auxiliary elastic portion are worn on the abdomen of the seated person to generate an elastic force that compresses the abdomen of the seated person to the backrest.

[0015] Additionally, the strap may have a ring shape.

[0016] In addition, the backrest may further include an adjustment part that adjusts the length of the first elastic part arranged in front of the backrest so that the range of movement of the chest of the seated person wearing the first elastic part is adjusted.

[0017] Other specific details of the present invention are included in the detailed description and drawings.

[0018] A chair having a back support function according to one embodiment of the present invention has a back support function that forcibly extends the lower back of a seated person, thereby enabling the seated person to maintain a correct sitting posture on the chair for a long time, preventing the seated person from experiencing back pain, and having the effect of improving the seated person's back pain.

[0019] The effects of the present invention are not limited to the effects mentioned above, and other effects not mentioned will be clearly understood by those skilled in the art from the description below.

[0020] FIG. 1 is a perspective view showing a chair having a belt function according to a first embodiment of the present invention.

[0021] Figure 2 is an exploded perspective view showing a chair having a belt function according to a second embodiment of the present invention.

[0022] FIG. 3 is a perspective view showing a chair having a belt function according to a second embodiment of the present invention.

[0023] Fig. 4 is a perspective view showing a chair having a belt function according to a third embodiment of the present invention.

[0024] Figure 5 is an enlarged view showing the adjustment part of a chair having a belt function according to a third embodiment of the present invention.

[0025] Figures 6 to 8 are enlarged views showing the operation process of the control unit of a chair having a belt function according to the third embodiment of the present invention.

[0026] The advantages and features of the present invention, and the methods for achieving them, will become clearer with reference to the embodiments described in detail below together with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below and may be implemented in various different forms. These embodiments are provided solely to ensure that the disclosure of the present invention is complete and to fully inform those skilled in the art of the scope of the present invention, and the present invention is defined solely by the scope of the claims.

[0027] The terminology used herein is for the purpose of describing embodiments only and is not intended to limit the present invention. In this specification, the singular also includes the plural unless specifically stated otherwise. As used herein, the terms "comprises" and / or "comprising" do not exclude the presence or addition of one or more other components in addition to the mentioned components. Like reference numerals refer to like components throughout the specification, and "and / or" includes each and any combination of one or more of the mentioned components. Although "first", "second", etc. are used to describe various components, these components are not limited by these terms. These terms are only used to distinguish one component from another. Therefore, it should be understood that a first component mentioned below may also be a second component within the technical spirit of the present invention.

[0028] Unless otherwise defined, all terms (including technical and scientific terms) used herein may be used in their common sense to those skilled in the art to which the present invention pertains. Furthermore, terms defined in commonly used dictionaries are not to be interpreted ideally or excessively unless explicitly and specifically defined otherwise.

[0029] Spatially relative terms such as "below," "beneath," "lower," "above," and "upper" can be used to easily describe the relationship between one component and other components as depicted in the drawings. Spatially relative terms should be understood to include different orientations of the components during use or operation in addition to the orientations depicted in the drawings. For example, if a component depicted in the drawings were flipped over, a component described as "below" or "beneath" another component could end up "above" the other component. Thus, the exemplary term "below" can include both the above and below orientations. Components can also be oriented in other directions, and thus spatially relative terms can be interpreted accordingly.

[0030] Before describing the present invention, in several embodiments, components having the same configuration will be described representatively in the first embodiment using the same reference numerals, and in other embodiments, configurations different from the first embodiment will be described.

[0031] Hereinafter, embodiments of the present invention will be described in detail with reference to the attached drawings.

[0032] FIG. 1 is a perspective view showing a chair having a belt function according to a first embodiment of the present invention.

[0033] As illustrated in FIG. 1, a chair having a belt function according to the first embodiment of the present invention includes a chair body (100) and a wearing part (200).

[0034] The chair body (100) can be used for the purpose of seating a seated person. The chair body (100) can include a seat (110), a backrest (120), a pair of armrests (130), and a movable part (140). The seat (110) is coupled to the upper side of the movable part (140) and can serve to induce the buttocks of the seated person to sit. The backrest (120) is coupled vertically to the rear of the seat (110) and can serve to support the back of the seated person. For example, the backrest (120) can have a duo-back structure that supports both sides of the back of the seated person. A pair of armrests (130) can be coupled to the left and right sides of the seat (110), respectively, and can serve to support both arms of the seated person. The movable part (140) can include a post that supports the seat (110) and a plurality of wheels coupled to the post. For example, the post may have a height-adjustable structure, for example, a telescopic structure, but the present invention is not limited thereto.

[0035] The wearing part (200) is worn on the upper body of the seated person, and functions to bring the upper body of the seated person into close contact with the backrest (120) and to extend the waist of the seated person. Specifically, the wearing part (200) is detachably connected to the backrest (120), and can generate elastic force to bring the upper body of the seated person into close contact with the backrest (120) and to extend the waist of the seated person. The wearing part (200) may include a first wearing part (210) and a second wearing part (200).

[0036] The first wearing part (210) can be worn on the chest of the seated person and serve to press the chest of the seated person against the backrest (120). The first wearing part (210) can include a first connecting part (211), a first Velcro part (212), and a first elastic part (213). Here, the first connecting part (211) can be provided at one end of the first wearing part (210), the first Velcro part (212) can be provided at the other end of the first wearing part (210), and the first elastic part (213) can be provided between one end and the other end of the first wearing part (210).

[0037] The first connecting portion (211) can be connected to one side of the upper portion of the backrest (120). The first connecting portion (211) can include a first base (211a) and a first sewing portion (211b).

[0038] The first base (211a) may be provided on one upper side of the backrest (120). For example, the first base (211a) may be detachably attached to one upper side of the backrest (120) using double-sided tape. As another example, the material of the first base (211a) may include fabric. As another example, the first base (211a) may have a plate shape.

[0039] The first sewing portion (211b) may be sewn to the first base (211a) and connected to the first elastic portion (213). For example, the first base (211a) may have an outer skin and an inner skin, and the first sewing portion (211b) may be sewn while being interposed between the outer skin and the inner skin of the first base (211a).

[0040] The first Velcro portion (212) can be detachably attached to the upper side of the backrest (120). The first Velcro portion (212) can include a first main Velcro (212a) and a first auxiliary Velcro (212b).

[0041] The first main Velcro (212a) can be detachably attached to the upper other side of the backrest (120). For example, the first main Velcro (212a) can be detachably attached to the upper other side of the backrest (120) using double-sided tape.

[0042] The first auxiliary Velcro (212b) is provided along a predetermined section of the first elastic portion (213) and can be detachably connected to the first main Velcro (212a). This first auxiliary Velcro (212b) may have a longer length than the first main Velcro (212a). Therefore, by adjusting the point at which the first main Velcro (212a) is connected to the first auxiliary Velcro (212b), the length of the first elastic portion (213) worn on the chest of the seated person can be adjusted.

[0043] The first elastic portion (213) connects the first connecting portion (211) and the first Velcro portion (212) and is positioned at the upper front of the backrest (120). It is worn on the chest of a seated person and can generate elastic force to press the chest of the seated person against the backrest (120). This first elastic portion (213) may include an elastic material, for example, neoprene, but the present invention is not limited thereto.

[0044] For example, the first wearing part (210) can be worn on the chest of a seated person by first connecting part (211) being connected to one upper side of the backrest (120), then first elastic part (213) being worn on the chest of a seated person, and then first Velcro part (212) being detachably connected to the other upper side of the backrest (120).

[0045] The second wearing part (200) can be worn on the abdomen of the seated person and serve to bring the abdomen of the seated person into close contact with the backrest (120). The second wearing part (200) can include a second connecting part, a second Velcro part (222), and a second elastic part (223). Here, the second connecting part can be provided at one end of the second wearing part (200), the second Velcro part (222) can be provided at the other end of the second wearing part (200), and the second elastic part (223) can be provided between one end and the other end of the second wearing part (200).

[0046] The second connecting portion may be connected to the lower side of the backrest (120). The second connecting portion may include a second base (221a) and a second sewing portion (221b).

[0047] The second base (221a) may be provided on one side of the lower portion of the backrest (120). For example, the second base (221a) may be detachably attached to one side of the lower portion of the backrest (120) using double-sided tape. As another example, the material of the second base (221a) may include fabric. As another example, the second base (221a) may have a plate shape.

[0048] The second sewing portion (221b) may be sewn to the second base (221a) and connected to the second elastic portion (223). For example, the second base (221a) may have an outer skin and an inner skin, and the second sewing portion (221b) may be sewn while being interposed between the outer skin and the inner skin of the second base (221a).

[0049] The second Velcro portion (222) can be detachably attached to the lower side of the backrest (120). The second Velcro portion (222) can include a second main Velcro (222a) and a second auxiliary Velcro (222b).

[0050] The second main Velcro (222a) can be detachably attached to the other side of the lower backrest (120). For example, the second main Velcro (222a) can be detachably attached to the other side of the lower backrest (120) using double-sided tape.

[0051] The second auxiliary Velcro (222b) is provided along a predetermined section of the second elastic portion (223) and can be detachably connected to the second main Velcro (222a). This second auxiliary Velcro (222b) may have a longer length than the second main Velcro (222a). Therefore, by adjusting the point at which the second main Velcro (222a) is connected to the second auxiliary Velcro (222b), the length of the second elastic portion (223) worn on the abdomen of the seated person can be adjusted.

[0052] The second elastic portion (223) connects the second connecting portion and the second Velcro portion (222), is positioned at the lower front of the backrest (120), and is worn on the abdomen of the seated person, thereby generating elastic force to press the abdomen of the seated person against the backrest (120). This second elastic portion (223) may include an elastic material, for example, neoprene, but the present invention is not limited thereto.

[0053] For example, the second wearable part (200) can be worn on the abdomen of the seated person by having the second connecting part connected to one side of the lower portion of the backrest (120), the second elastic part (223) worn on the abdomen of the seated person, and then the second Velcro part (222) detachably connected to the other side of the lower portion of the backrest (120).

[0054] For example, the first elastic member (213) may have a lower elastic modulus than the second elastic member (223). Accordingly, the first elastic member (213) worn on the chest of the seated person may be relatively more elastic than the second elastic member (223) worn on the abdomen of the seated person, thereby allowing a predetermined range of movement of the chest of the seated person. Through this, the first elastic member (213) may provide convenience in movement of the chest of the seated person.

[0055] FIG. 2 is an exploded perspective view showing a chair having a backrest function according to a second embodiment of the present invention, and FIG. 3 is a perspective view showing a chair having a backrest function according to a second embodiment of the present invention.

[0056] As shown in FIGS. 2 and 3, the chair having a belt function according to the second embodiment of the present invention may, unlike the first embodiment, include a wearing part (200) including a strap (250), a third wearing part (260), and a fourth wearing part (270).

[0057] The strap (250) can be inserted into the backrest (120). In other words, the strap (250) can surround the perimeter of the backrest (120). For example, the strap (250) can have a ring shape. Additionally, an elastic waist belt can be used as the strap (250).

[0058] The third wearable part (260) can be worn on the chest of the seated person and serve to press the chest of the seated person against the backrest (120). The third wearable part (260) can include a third main elastic part (261), a third auxiliary elastic part (262), and a third Velcro part (263).

[0059] The third main elastic part (261) can be coupled to one upper side of the strap (250), and the third auxiliary elastic part (262) can be coupled to the other upper side of the strap (250). The third main elastic part (261) and the third auxiliary elastic part (262) are detachably coupled to each other through the third Velcro part (263), are placed at the front of the backrest (120), and can be worn on the chest of a seated person. In addition, the third main elastic part (261) and the third auxiliary elastic part (262) are coupled to each other through the third Velcro part (263), and when worn on the chest of a seated person, an elastic force can be generated to press the chest of the seated person against the backrest (120). The third main elastic member (261) and the third auxiliary elastic member (262) may include an elastic material, for example, neoprene, but the present invention is not limited thereto.

[0060] The third Velcro portion (263) can serve to detachably connect the third main elastic portion (261) and the third auxiliary elastic portion (262). The third Velcro portion (263) can include a third main Velcro (263a) and a third auxiliary Velcro (263b).

[0061] The third main Velcro (263a) can be coupled to the third main elastic member (261). For example, referring to FIGS. 2 and 3, the third main Velcro (263a) can be coupled to the distal end of the third main elastic member (261).

[0062] The third auxiliary Velcro (263b) can be provided along a predetermined section of the third auxiliary elastic member (262) and can be detachably connected to the third main Velcro (263a). Accordingly, by adjusting the point at which the third main Velcro (263a) is connected to the third auxiliary Velcro (263b), the length of the third auxiliary elastic member (262) worn on the chest of the seated person can be adjusted.

[0063] The fourth wearing part (270) can be worn on the abdomen of the seated person and serve to press the abdomen of the seated person against the backrest (120). The fourth wearing part (270) can include a fourth main elastic part (271), a fourth auxiliary elastic part (272), and a fourth Velcro part (273).

[0064] The fourth main elastic part (271) can be coupled to one side of the lower portion of the strap (250), and the fourth auxiliary elastic part (272) can be coupled to the other side of the lower portion of the strap (250). The fourth main elastic part (271) and the fourth auxiliary elastic part (272) are detachably coupled to each other through the fourth Velcro part (273), and are placed at the front of the backrest (120) and can be worn on the abdomen of a seated person. In addition, the fourth main elastic part (271) and the fourth auxiliary elastic part (272) are coupled to each other through the fourth Velcro part (273), and when worn on the abdomen of a seated person, an elastic force can be generated to press the abdomen of the seated person against the backrest (120). The fourth main elastic member (271) and the fourth auxiliary elastic member (272) may include an elastic material, for example, neoprene, but the present invention is not limited thereto.

[0065] The fourth Velcro portion (273) can serve to detachably connect the fourth main elastic portion (271) and the fourth auxiliary elastic portion (272). The fourth Velcro portion (273) can include the fourth main Velcro (273a) and the fourth auxiliary Velcro (273b).

[0066] The fourth main Velcro (273a) can be coupled to the fourth main elastic member (271). For example, referring to FIGS. 2 and 3, the fourth main Velcro (273a) can be coupled to the end of the fourth main elastic member (271).

[0067] The fourth auxiliary Velcro (273b) can be provided along a predetermined section of the fourth auxiliary elastic member (272) and can be detachably connected to the fourth main Velcro (273a). Accordingly, by adjusting the point at which the fourth main Velcro (273a) is connected to the fourth auxiliary Velcro (273b), the length of the fourth auxiliary elastic member (272) worn on the abdomen of the seated person can be adjusted.

[0068] In one embodiment, the third main elastic part (261) and the third auxiliary elastic part (262) may have elastic moduli smaller than those of the fourth main elastic part (271) and the fourth auxiliary elastic part (272). At this time, the third main elastic part (261) and the third auxiliary elastic part (262) may have the same elastic moduli, and the fourth main elastic part (271) and the fourth auxiliary elastic part (272) may have the same elastic moduli. Therefore, the third main elastic part (261) and the third auxiliary elastic part (262) worn on the chest of the seated person can be stretched relatively more easily than the fourth main elastic part (271) and the fourth auxiliary elastic part (272) worn on the abdomen of the seated person, and thus a predetermined range of movement can be permitted for the chest of the seated person. Through this, the third main elastic part (261) and the third auxiliary elastic part (262) can provide convenience for movement of the chest of the seated person.

[0069] FIG. 4 is a perspective view showing a chair having a belt function according to a third embodiment of the present invention, FIG. 5 is an enlarged view showing an adjustment part of a chair having a belt function according to a third embodiment of the present invention, and FIGS. 6 to 8 are enlarged views showing an operation process of an adjustment part of a chair having a belt function according to a third embodiment of the present invention.

[0070] As shown in FIGS. 4 and 5, a chair having a belt function according to the third embodiment of the present invention may further include an adjustment unit (300), unlike the first embodiment.

[0071] The adjusting member (300) can adjust the length of the first elastic member (213) positioned in front of the backrest (120) so that the range of movement of the chest of the seated person wearing the first elastic member (213) is adjusted when the chest of the seated person is worn on the first elastic member (213). In this way, when the length of the first elastic member (213) positioned in front of the backrest (120) is adjusted, the range of movement of the chest of the seated person wearing the first elastic member (213) can also be adjusted.

[0072] For example, as the length of the first elastic part (213) arranged in front of the backrest (120) decreases, the allowable range of movement of the chest of the seated person decreases, but the pressing force of the first elastic part (213) to press the chest of the seated person against the backrest (120) may increase. As another example, as the length of the first elastic part (213) arranged in front of the backrest (120) increases, the allowable range of movement of the chest of the seated person increases, but the pressing force of the first elastic part (213) to press the chest of the seated person against the backrest (120) may decrease.

[0073] The control unit (300) may include a winding roll (310), a mounter (320), a screw shaft (330), a stopper (340), a spring (350), a moving nut (360), and a knob (370).

[0074] The winding roll (310) is connected to the first connecting portion (211) and the first elastic portion (213) can be wound or unwound.

[0075] For example, when the take-up roll (310) rotates in reverse, the first elastic portion (213) can be taken up on the take-up roll (310), and when the take-up roll (310) rotates in a forward direction, the first elastic portion (213) can be unwound from the take-up roll (310). As another example, when the first elastic portion (213) is taken up on the take-up roll (310), the take-up roll (310) can be rotated in reverse (see FIG. 6), and when the first elastic portion (213) is unwound from the take-up roll (310), the take-up roll (310) can be rotated in a forward direction. (See Fig. 7) Therefore, as the forward rotation range of the winding roll (310) increases, the length at which the first elastic part (213) can be unwound from the winding roll (310) increases, and thus the length of the first elastic part (213) arranged in front of the backrest (120) may increase. In addition, as the forward rotation range of the winding roll (310) decreases, the length at which the first elastic part (213) can be unwound from the winding roll (310) decreases, and thus the length of the first elastic part (213) arranged in front of the backrest (120) may decrease. Meanwhile, the forward rotation range of the winding roll (310) may be adjusted by the screw shaft (330), the first stopper (340), the second stopper (340), the moving nut (360), and the nut, which will be described later.

[0076] For example, the winding roll (310) may have a hollow cylindrical shape, and a screw shaft (330), a stopper (340), a spring (350), and a moving nut (360) may be accommodated inside the winding roll (310).

[0077] The mounter (320) can be rotatably coupled to the winding roll (310) and can be coupled to the backrest (120). For example, the mounter (320) can have a larger diameter than the winding roll (310).

[0078] The screw shaft (330) can be inserted into the winding roll (310). A moving nut (360) to be described later can be screw-connected to the screw shaft (330), and the screw shaft (330) can be force-fitted to a stopper (340) to be described later.

[0079] The stopper (340) is coupled to the inside of the winding roll (310), and one side of the screw shaft (330) can be forcibly fitted.

[0080] The mainspring (350) connects the mounter (320) and the winding roll (310), and can generate an elastic force that reversely rotates the winding roll (310). For example, the mainspring (350) has one end coupled to the mounter (320) and the other end coupled to the winding roll (310), and stores the force caused by the forward rotation of the winding roll (310), and when an external force that rotates the winding roll (310) forward or stops the winding roll (310) is not applied, the force can be released as a force that reversely rotates the winding roll (310). In this way, when the winding roll (310) is reversely rotated by the mainspring (350), the first elastic part (213) is wound around the winding roll (310), and thus the length of the first elastic part (213) arranged in front of the backrest (120) can be reduced. (See Figure 7)

[0081] The moving nut (360) is screw-connected to the screw shaft (330) and connected to the inner surface of the winding roll (310), and can move along the screw shaft (330) by the forward or reverse rotation of the winding roll (310). Here, the moving nut (360) can be moved in a direction closer to the stopper (340) by the forward rotation of the winding roll (310), and can be moved in a direction away from the stopper (340) by the reverse rotation of the winding roll (310). At this time, when the moving nut (360) moves along a movement path from the initial position of the screw shaft (330) to the position of the stopper (340) by the forward rotation of the winding roll (310), the additional direct movement of the moving nut (360) is blocked by the stopper (340), and the forward rotation of the winding roll (310) is also blocked. Therefore, the range of possible forward rotation of the winding roll (310) can be determined according to the length of the movement path of the moving nut (360) due to the forward rotation of the winding roll (310).

[0082] The knob (370) serves to adjust the length of the movement path of the moving nut (360). Specifically, the knob (370) is coupled to the screw shaft (330) and can adjust the initial position of the screw shaft (330) of the moving nut (360) by rotating the screw shaft (330) forward or backward. At this time, as the initial position of the screw shaft (330) of the moving nut (360) gets closer to the stopper (340), the length of the movement path of the moving nut (360) decreases, and thus the possible range of forward rotation of the winding roll (310) may also decrease. In addition, as the initial position of the moving nut (360) gets farther from the stopper (340), the length of the movement path of the moving nut (360) increases, and thus the possible range of forward rotation of the winding roll (310) may also increase.

[0083] According to the present invention, a chair having a back support function according to one embodiment of the present invention has a back support function that forcibly extends the waist of a seated person, thereby enabling the seated person to maintain a correct sitting posture on the chair for a long time, preventing the seated person from having back pain, and having the effect of improving the seated person's back pain.

[0084] While the embodiments of the present invention have been described above with reference to the attached drawings, those skilled in the art will appreciate that the present invention can be implemented in other specific forms without altering the technical concept or essential features thereof. Therefore, the embodiments described above should be understood to be illustrative in all respects and not restrictive.

Claims

1. A chair body having a seat on which a seated person sits and a backrest that is connected to the seat and supports the back of the seated person; and A chair having a waist belt function, including a wearable part that is detachably connected to the backrest and is worn on the upper body of a seated person to bring the upper body of the seated person into close contact with the backrest, thereby generating elasticity to extend the waist of the seated person.

2. In paragraph 1, The above-mentioned wearing part is, A first wearing part including a first connecting part that is connected to the upper part of the backrest, a first Velcro part that is detachably connected to the upper part of the backrest, and a first elastic part that connects the first connecting part and the first Velcro part and is worn on the chest of a seated person and generates elasticity to press the chest of the seated person against the backrest; and A chair having a waist belt function, comprising a second wearing part including a second connecting part connected to the lower part of the backrest, a second Velcro part detachably connected to the lower part of the backrest, and a second elastic part that connects the second connecting part and the second Velcro part and is worn on the abdomen of a seated person and generates elasticity to press the waist of the seated person against the backrest.

3. In paragraph 2, A chair having a belt function, wherein the first elastic part has a lower elastic coefficient than the second elastic part.

4. In paragraph 2, The above first Velcro part, A first main Velcro detachably attached to the upper portion of the backrest; and It includes a first auxiliary Velcro provided along a predetermined section of the first elastic part and detachably connected to the first main Velcro, The second Velcro part above A second main Velcro detachably attached to the lower portion of the backrest; and A chair having a waist belt function, comprising a second auxiliary Velcro provided along a predetermined section of the second elastic portion and detachably connected to the second main Velcro.

5. In paragraph 2, The above first connecting part is, A first base provided on the upper part of the backrest; and It includes a first sewing part that is sewn to the first base and connected to the first elastic part, The above second connecting part is, A second base provided at the lower part of the above backrest; and A chair having a waist belt function, comprising a second sewing part sewn to the second base and connected to the first elastic part.

6. In paragraph 1, The above-mentioned wearing part is, A strap inserted inside the above backrest; A third wearing part including a third main elastic part coupled to one upper side of the strap, a third auxiliary elastic part coupled to the other upper side of the strap, and a third Velcro part that detachably couples the third main elastic part and the third auxiliary elastic part; and A fourth wearing part including a fourth main elastic part coupled to one lower side of the strap, a fourth auxiliary elastic part coupled to the other lower side of the strap, and a fourth Velcro part that detachably couples the fourth main elastic part and the fourth auxiliary elastic part, The third main elastic part and the third auxiliary elastic part are worn on the chest of the seated person and generate elasticity that presses the chest of the seated person against the backrest. A chair having a backrest function, wherein the third main elastic part and the third auxiliary elastic part are worn on the abdomen of a seated person and generate elasticity that presses the abdomen of the seated person against the backrest.

7. In paragraph 6, A chair having a waist belt function, wherein the third main elastic part and the third auxiliary elastic part have elasticity coefficients smaller than those of the fourth main elastic part and the fourth auxiliary elastic part.

8. In paragraph 6, The third Velcro part above A third main Velcro coupled to the third main elastic portion; and A third auxiliary Velcro is provided along a predetermined section of the third auxiliary elastic part and is detachably connected to the third main Velcro. The above fourth Velcro part A fourth main Velcro coupled to the fourth main elastic portion; and A chair having a waist belt function, comprising a fourth auxiliary Velcro provided along a predetermined section of the fourth auxiliary elastic part and detachably connected to the fourth main Velcro.

9. In paragraph 6, The above strap is a chair having a belt function and having a ring shape.

10. In paragraph 2, A chair having a waist belt function, further comprising an adjusting member for adjusting the length of the first elastic member positioned in front of the backrest so as to adjust the range of movement of the chest of a seated person wearing the first elastic member.

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