KR200401323Y1 - A Backrest of Chair - Google Patents

Abstract

The present invention relates to a backrest of an office chair, and more particularly, a plurality of backrest members are supported and coupled to the backrest frame by placing them up and down, thereby forming a semicircular guide part on the first support so as to partially rotate within a predetermined angle. The present invention relates to a backrest of an office chair that can provide more comfort to a seated person, and combines a back frame, a first support and a second support, and has a high-strength screw bolt as a rotation axis, thereby ensuring durability in a rotating configuration.

To this end, the present invention, in the backrest of the office chair with a backrest is formed, the backrest frame is formed integrally connected; A plurality of the backrest frame is spaced apart from each other by a certain distance, and is configured to include a backrest member forcibly rotating at an angle according to the pressure, respectively, wherein the backrest member is coupled to both sides of the backrest frame, but is in contact with the outer circumferential surface of the frame to force rotation A pair of first supports having semi-circular guide portions formed on both sides thereof, a pair of second supports coupled together with the first support to rotate together, and a sheet interposed between and fixed to the pair of second supports. It is composed of members.

Description

Chair Back {A Backrest of Chair}

The present invention relates to a backrest of an office chair, and more particularly, a plurality of backrest members are supported and coupled to the backrest frame by placing them up and down, thereby forming a semicircular guide part on the first support so as to partially rotate within a predetermined angle. The present invention relates to a backrest of an office chair that can provide more comfort to a seated person, and combines a back frame, a first support and a second support, and has a high-strength screw bolt as a rotation axis, thereby ensuring durability in a rotating configuration.

In general, the backrest and the seat of the chair are made of synthetic resin, metal, and wood to support the chair, which is mainly used as a simple chair because of the lack of comfort. The cushion material is wrapped in leather seat or fabric seat to give comfort.

The backrest of such a conventional office chair is composed of a single plate body and is integrally fixed to the backrest frame, which is poor in air communication and requires a separate neckrest or waistrest to support the neck or waist. There is a problem.

According to the Utility Model Application No. 10769, which is proposed to improve this, in an office chair composed of a seat plate and a back plate, it is formed between each back member installed in multiple stages with a predetermined width up and down, and a top and bottom back member. The space part and both ends of the back member are composed of a variable type which is forcibly rotated by being installed on the body. A cushion member is built in the seat of the back member, and the central shaft tube of the central part is fixedly installed at both ends of the back member. The support member is penetrated and the support member is rotated around the support shaft, and the pressing member is installed on both sides of the body with the adjusting bolts to adjust the gap. The back member is forced to rotate when a force is applied to it.

Accordingly, the back of the office chair has a multi-stage back plate member installed in multiple stages, so that the air can be smoothly communicated through the spaces between them, and the back plate member can be used as a neck rest and a waist support. When using a backing member of different materials, the front and rear surfaces are forcibly rotated, thereby making it possible to conveniently use the backing surface by converting the backing surface into a leather sheet or a fabric sheet.

However, according to the configuration of the back plate, when the seated person is seated, the excessive force is transmitted to the zip packing when the back member rotates, so the wear of the zip packing occurs quickly, causing frequent replacement or deterioration of the comfortable function of the chair itself. do.

The present invention was devised to solve the above problems, and the plurality of back members are supported by the back frame by placing them up and down, and forming a semi-circular guide portion on the first support to provide partial rotation within a predetermined angle. It provides more comfort to the user, and combines the back frame, the first support and the second support, and the high-strength screw bolt is used as the rotation axis, so there is no deterioration of operation function due to abrasion or the hassle of replacement and durability The purpose is to provide a backrest for this guaranteed office chair.

The present invention has the following features to achieve the above object.

The present invention, in the backrest of the office chair is formed, the backrest frame is formed integrally connected; The backrest frame is coupled to a plurality of spaced apart by a certain distance spaced up and down, and the backrest member is rotated by a predetermined angle according to the pressure; respectively, wherein the backrest member is coupled to both sides of the backrest frame, but in contact with the outer peripheral surface of the frame It consists of a pair of first support that is formed on both sides of the pair of guide parts to rotate by a certain angle to interfere, and a sheet member that is fixedly coupled to interlock between the pair of first support.

The pair of guide parts may have a semi-circle shape or a semi-ellipse shape, and the rotational limit angle is 30 ° to 45 ° before and after the backrest frame.

In addition, the backrest member includes a second support that is interposed between the first support and the seat member is fixedly coupled, the back frame is formed with a through hole so that the backrest frame and the first support and the second support is coupled to the coupling means. And a through hole is formed in the first support and the second support, and a protruding member having a hollow communicating with the through hole of the second support is formed on one side of the second support, respectively, and the coupling means includes a back frame and a first support. The screw bolt is received in the hollow of the protruding member, the male thread is formed on the outer periphery, and a plurality of coupling heads coupled to the inner side from the outer surface of the protruding member are formed and is accommodated in the hollow of the protruding member and the screw bolt and It consists of a nut body which has a protruding tube body in which the internal thread was formed in the inner periphery so that screwing may be carried out.

In addition, in the sheet member, a support rod having a hollow portion with a predetermined depth is inserted to accommodate each of the protruding members formed at a pair of second supports.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a perspective view showing the backrest of the office chair according to an embodiment of the present invention, Figure 2 is an exploded perspective view showing the combination of the backrest frame and the back member according to an embodiment of the present invention, Figure 3 is a backrest frame and 4 is an operational state diagram of the first support to combine, Figure 4 is a state diagram of the use of the backrest according to an embodiment of the present invention.

Referring to the drawings, the present invention is largely separated into the upper frame 10 and the lower frame 20, the lower back frame 20 is fitted into the lower frame 20 to the inside of the hollow upper frame 10 is formed As long as the pair of guide portions 111 having a semicircle shape or a semi-ellipse shape to be coupled to both sides of the backrest frame 100 but in contact with the outer circumferential surface of the backrest frame 100 and forcibly rotated at an angle are formed on both sides. A pair of first supports 110 and a pair of second supports 120 coupled together with the first support 110 to rotate together with the pair of second supports 120 to be fixedly interposed therebetween. It consists of a backrest member 200 made of a sheet member 130.

The backrest frame 100 is configured to support the plurality of spaced back support member 200 to be rotated at a predetermined angle, the backrest frame 100 is separated from the lower frame 20 that the backrest member 200 is supported And the upper end is bent for ease of movement and consists of the upper side frame 10 to which the lower side frame 20 is fitted.

The lower frame 20 is preferably corrosion resistant and high strength stainless steel alloy series, the upper frame 10 is in direct contact with the user's hand is preferably coated with a soft plastic series or rubber member. Do.

In addition, by forming a hollow in the lower frame 20 can be configured so that the upper frame 10 is fitted, of course, without being separated into the upper frame 10 and the lower frame 20 integrally. Of course, the technical spirit of the present invention is not limited thereto.

In addition, the lower frame 20 is formed with the through-holes 21 on both sides in the horizontal direction by the number of the backrest member 200, which is the backrest frame 100 and the first and second support (1) by the coupling means to be described later ( 110 and 120 are formed to be coupled.

In addition, the lower side of the frame 20, the coupling bracket 22 may be formed to be coupled to the chair seat plate, of course.

On the other hand, the backrest member 200 is coupled to the lower frame 20 by a plurality of spaced apart by a certain distance spaced up and down, and is provided to forcibly rotate a certain angle in accordance with the pressure of each seat of the seat, naturally by rotating the force As you give comfort.

Here, the backrest member 200 is coupled to both sides of the backrest frame 100, but a pair of guides 111 having a semicircle shape or a semi-elliptic shape so as to rotate at an angle in contact with the outer circumferential surface of the backrest frame 100 are formed on both sides. A pair of first supports 110, a pair of second supports 120 coupled together with the first support 110 to rotate together, and the pair of second supports 120 fixedly interposed therebetween It consists of a back support member 200 made of a sheet member 130.

The first support 110 is coupled to the back frame 100 by a screw bolt 140 so as to be rotated to the back frame 100, where the outer surface of the back frame 100 to both sides as a means for partially rotating at an angle. A pair of guide portions 111 having a semi-circle shape or a semi-elliptic shape to guide the rotation in contact with each other are formed, and a through hole 112 for accommodating the screw bolt 140 is formed at the center side.

In this case, the guide portion 111 is preferably 30 ° to 45 ° before and after around the backrest frame by further limiting the rotation angle range to solve the inconvenience of sitting due to the conventional 360 ° rotation, This may be adjusted according to the shape of the guide portion 111 or the distance from the backrest frame 100.

In addition, the shape of the guide portion 111 may be a rectangular shape, in this case is to achieve a rotation angle angle by interference with the backrest frame 100 at a predetermined interval.

On the other hand, the second support 120 is coupled by the coupling means of the first support 110, the screw bolt 140 and the nut body 150, the bolt 170 and the nut (up and down both sides in order to increase the coupling force) 171 is preferably fastened.

To this end, the second support 120 has a through hole 122 formed in communication with the through hole 112 of the first support 110, and a cylindrical protrusion member 121 having a hollow communicating therewith is formed at one side. The screw bolt 140 is introduced into the hollow, and the other side is formed with a screw bolt 140 and a female thread 152a having a male thread 141 formed therein by protruding the tubular body 152 of the nut body 150. The nut body 150 is guided to screw.

Here, the nut body 150 has a plurality of coupling nibs 151 formed to be forced into and supported in the inward direction from the outer surface of the protruding member 121 and is accommodated in the hollow of the protruding member 121 and the screw bolt. It consists of a protruding tube body 152 formed with a female screw thread 152a on the inner circumference to screw with 140.

In addition, the pair of second supporters 120 are coupled to each other via a sheet member 130, and a fixed end 123 is protruded from the second supporter 120 so as to be firmly coupled to the seat members 130. .

The seat member 130 is preferably made of leather seats or fabric sheets to give the seated person comfort, one side is formed of a leather sheet and the other side is formed of a fabric sheet in order to vary the sense of contact according to the season Of course, it can be arranged accordingly.

For the arrangement, after removing the upper frame 10, the screw bolt 140 may be separated and repositioned.

In addition, the seat member 130 is provided between the pair of second supporters 120 to provide a support rod 160 to support the backrest member 200, the second support 120 of both ends of the support rods 160 A groove may be formed to accommodate the protruding member 121 and may be combined with the protruding member 121.

Wherein the support rod 160 is a component to the reinforcement member having a reinforcement or support area of the backrest member 200, including the seat member 130, unlike the role as a rotation axis as in the conventional configuration of course .

As described above, the present invention supports a plurality of backrest members to be coupled to the backrest frame by placing them up and down, and forms a semicircular or semi-elliptic guide portion on the first support to provide partial rotation within a predetermined angle. Can give you more comfort.

In addition, the back frame, the first support and the second support is combined with a high-strength screw bolt as a rotating shaft, there is no deterioration of operation function due to wear or replacement in the rotational configuration, and durability is guaranteed.

1 is a perspective view showing the back of the office chair according to an embodiment of the present invention.

Figure 2 is an exploded perspective view showing the coupling of the back frame and the back plate member according to an embodiment of the present invention.

Figure 3 is an operating state of the first support coupled to the back frame.

Figure 4 is a state of use of the backrest according to an embodiment of the present invention.

<Description of the symbols for the main parts of the drawings>

10: upper frame 20: lower frame

21: through hole 22: coupling bracket

100: back frame 110: first support

111: guide portion 112: through hole

120: second support 121: protruding member

122: through hole 123: fixed end

130: seat member 140: screw bolt

141: male thread 150: nut body

151: bonding tip 152: protruding tube

152a: female thread 160: support rod

170: bolt 171: nut

Claims (4)

In the back of the chair formed with the back, And back frame is formed integrally connected; The backrest frame is coupled to a plurality of spaced apart by a certain distance to the backrest frame and the backrest member is rotated by a predetermined angle depending on the pressure; The backrest member is coupled between both sides of the backrest frame, but is interposed between a pair of first supporters having a pair of guide portions formed on both sides to rotate at a predetermined angle in contact with or interfere with the outer peripheral surface of the frame, and the pair of first supports The back of the office chair, characterized in that consisting of a seat member fixedly coupled to rotate together. The method of claim 1, The pair of guide parts have a semi-circular shape or a semi-elliptic shape, the angle of rotation of the back of the office chair, characterized in that 30 ° to 45 ° front and rear around the back frame. The method according to claim 1 or 2, The backrest member includes a second support that is interposed between the first support and the seat member and is fixedly coupled to each other. A through hole is formed in the backrest frame such that the backrest frame and the first support and the second support are coupled to the coupling means. Through holes are formed in the first support and the second support, and each of the protrusions having a hollow communicating with the through hole of the second support is formed on one side of the second support, The coupling means penetrates the back frame and the first support and is accommodated in the hollow of the protruding member, and a screw bolt having a male thread formed on the outer circumference thereof, and a plurality of coupling nibs formed in the inward direction from the outer surface of the protruding member are formed and protruded. The back of the office chair, characterized in that it is made of a nut body having a protruding tube body formed with a female thread on the inner circumference to be screwed to the screw bolt and received in the hollow portion of the member. The method of claim 3, wherein The backrest of the office chair, characterized in that the support rod is inserted into the seat member is formed with a hollow portion of a predetermined depth so as to accommodate each of the protruding members formed on the pair of second support.