KR101074490B1 - Chair - Google Patents

Abstract

The present invention relates to a chair, which includes a seat plate, a leg formed at the bottom of the seat plate to support the seat plate, a frame connected to an upper end of the rear side of the leg, and integrally formed with the seat plate to rotate about the frame. And a backrest, wherein the frame has a pair of vertical bars connected to the rear top of the leg and a horizontal arm connected across the top of the pair of vertical bars, and the backrest is formed to protrude from a rear surface thereof. It provides a configuration having a coupling member coupled to the horizontal arm.
By using the chair as described above, the present invention can protect the user's back and waist by forming a seat plate and the backrest integrally to perform a cushioning operation during the rotational movement of the backrest as the user's posture changes.

Description

Chair {CHAIR}

The present invention relates to a chair, and more particularly, to a chair capable of cushioning while supporting the back and waist of a user by integrally forming a seat plate and a backrest.

In general, chairs consist of seat plates, legs and backrests.

In particular, the backrest is configured to support the waist, back, shoulders and neck areas, and has been produced in various ways by applying ergonomics.

Applicant has proposed a chair with a backrest that cushions the back of a user while applying a cushioning function to Korean Patent Application No. 10-2009-0024757 (filed March 24, 2009, hereinafter referred to as 'Patent Document 1'), Korea Utility Model Application No. 20-2009-0007546 (filed June 11, 2009, hereinafter referred to as 'Patent Document 2') and the like has been filed.

1 is a perspective view of a backrest according to Patent Document 1, Figure 2 is a cross-sectional view of the lumbar support is applied to the backrest.

As shown in FIG. 1, the backrest applied to the chair according to Patent Literature 1 includes a frame 1 having a vertical part connecting both sides and a horizontal part connecting the upper end thereof, and a metal bar welded across the lower end of the frame 1. (2), the upper end is welded to the frame (1) and the lower end is a vertical bar (3) welded to the metal bar (2), the coupling member (4), the frame (1) coupled to the lower part of the metal bar (2) and Covered to the outside of the metal bar (2) and the vertical bar (3) is coupled to the outside of the seat (5) and the seat (5) which is installed to wrap up to the coupling member (4) is coupled to the outside of the coupling member (4) And a finishing member 5a.

The backrest according to Patent Document 1 configured as described above is fixed to the seat plate by the lumbar support 6, as shown in FIG. 2, and the lumbar support 6 is attached to the attachment surface 7 attached to the lower part of the seat plate, attached. It is vertically formed upwardly from the surface 7 and has a connecting portion 8 connected to the vertical bar 3, a support plate 9 coupled to the front of the vertical bar 3, and an adjustment bolt for fixing the support plate 9. do.

The backrest according to Patent Document 1 having such a configuration forms a backrest by combining the respective parts, and is fixed to the seat plate using lumbar support, so that the structure is somewhat complicated, and the manufacturing cost of joining each part is also high. Rise, there was a problem that takes a lot of production time.

3 is a partially exploded perspective view of a chair according to Patent Document 2. FIG.

As shown in FIG. 3, the chair according to Patent Document 2 is provided on the seat 11, the bottom of the seat 11, and the legs 12 and the seat 11 supporting the seat 11. It includes a backrest 13 is provided on the rear upper portion, the armrest 14 is coupled to the leg 12 is provided with an elastic coupling portion 15 on both sides of the inner surface, the elastic coupling portion on both sides of the backrest 13 Rotating coupling part 16 is provided so that 15 is inserted and coupled.

At this time, the elastic coupling portion 15 has a coupling space (15 ') is inserted into the rotary protrusion 161 of the rotary coupling portion 16, the coil spring 151, the upper and lower portions of the coil spring 151 It is provided with an elastic means consisting of an upper pin 152 and a lower pin 153, respectively.

The rotary coupling portion 16 has a rotary protrusion 161 formed to protrude so as to be inserted into the coupling space 15 'of the elastic coupling portion 15, and the rotary protrusion 161 is convex upward in a semicircular cross section. Should be formed.

Accordingly, the backrest 13 of the chair according to Patent Document 2, when the user turns the waist in a state in which the rotation protrusion 161 is coupled to the coupling space 15 'of the elastic coupling part 15, the back and the waist While pressed to rotate around the rotation protrusion 161, the buffer spring by the elastic force of the elastic force is to act.

Since the chair according to Patent Document 2 having such a configuration must manufacture and combine the respective components constituting the elastic coupling portion and the rotary coupling portion, the structure is rather complicated, and the manufacturing cost of joining each component also takes a lot, so that the product cost is high. Rising, there was a problem that takes a lot of production time.

Republic of Korea Patent Application No. 10-2009-0024757 (filed March 24, 2009) Republic of Korea Utility Model Application No. 20-2009-0007546 (filed June 11, 2009)

The present invention is to solve the problems as described above, an object of the present invention is to provide a chair that can be cushioned while supporting the user's back and waist using the seat plate and the backrest formed integrally.

It is another object of the present invention to provide a chair that can make the components more concise and save manufacturing costs and time.

According to a feature of the present invention for achieving the object as described above, the present invention is a seat plate, a bridge formed on the lower portion of the seat plate to support the seat plate, the frame and the seat plate is connected to the upper end of the rear side and It is integrally formed and includes a backrest for rotating around the horizontal arm, the frame has a pair of vertical bars connected to the rear top of the leg and a horizontal arm connected across the top of the pair of vertical bars The backrest is formed to protrude from the rear surface and has a coupling member coupled to the horizontal arm.

The lower surface of the seat plate is provided with a plurality of pairs of threaded parts are formed on the inner circumferential surface, the cover is formed by covering the threaded portion of the pair, the center portion is penetrated so that the connection bar is coupled.

The cover has a curved surface formed concave in the center portion to be inserted into the connection bar, characterized in that the first and second sliding members are installed between the lower surface and the connection bar of the seat plate and between the connection bar and the curved surface. .

The upper surface of the connection bar is characterized in that a pair of stoppers are spaced apart by a linear movement distance of the seat plate.

The lower portion of the coupling member is formed so that the horizontal arm is coupled to the coupling hole is formed, the coupling member is provided with a fixing protrusion protruding to the lower side of the rear side of the coupling member to fix the horizontal arm coupled to the coupling hole It is characterized by.

The leg is formed by bending a metal rod, characterized in that it comprises a pair of support portions coupled to the front and rear sides of the lower portion of the seat plate and a connecting bar connecting the pair of upper portions of the support portions.

As described above, the present invention may be formed integrally with the seat plate and the backrest to perform a cushioning operation during the rotational movement of the backrest as the user's posture changes, thereby protecting the user's back and waist, and can provide comfort to the user. .

In addition, the present invention can simplify the structure of the chair by allowing the backrest to rotate without a separate fixed structure to simplify the manufacturing process to improve the assembly and reduce the time and cost required for manufacturing.

1 is a perspective view of a backrest according to the prior art.
Figure 2 is a cross-sectional view applied lumbar support to the backrest.
3 is a perspective view of a chair according to the prior art.
4 is a perspective view of a chair according to a preferred embodiment of the present invention.
5 is an exploded perspective view of the chair shown in FIG. 4.
6 is an exploded perspective view showing the chair shown in FIG. 4 from another angle;
7 is an operation state diagram of a chair according to an embodiment of the present invention.
8 is a perspective view of a chair according to another embodiment of the present invention.

Hereinafter, a chair according to a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

Figure 4 is a perspective view of a chair according to a preferred embodiment of the present invention, Figure 5 is an exploded perspective view of the chair shown in Figure 4, Figure 6 is an exploded perspective view showing the chair shown in Figure 4 from a different angle.

As shown in Figure 4, the chair according to the preferred embodiment of the present invention is formed on the seat plate 20, the lower portion of the seat plate 20 to support the seat plate 20, the leg 30, the rear side of the leg 30 It is integrally formed with the frame 40 and the seat plate 20 connected to the upper portion, and includes a backrest 50 that rotates about the frame 40.

The seat plate 20 is formed to correspond to the shape of the hip region of the user by using a synthetic resin material, and is linearly reciprocated back and forth by the rotational movement of the backrest 50 is formed integrally.

To this end, as shown in Figures 5 and 6, the lower surface of the seat plate 20 is formed with a plurality of pairs of threaded portion 21 is formed to protrude downward, the threaded portion 21 to cover the threaded portion inside Cover 22 having a coupling space 22 'is coupled to the first, and the coupling space 22 is coupled to the upper and lower surfaces of the connecting bar 32 so that the seat plate 20 can smoothly reciprocate linearly. Two sliding members 23 and 24 are provided.

For example, as shown in FIG. 6, as shown in FIG. 6, two pairs of pairs of connecting bars 32 are formed, respectively, and a total of eight screws are provided. A screw thread is formed on the inner circumferential surface to fasten bolts.

The cover 22 fixes the seat plate 20 to the connection bar 32 connecting the upper portion of the leg 30, and at the same time, the seat plate 20 follows the connection bar 32 during the reciprocation of the seat plate 20. It guides the linear reciprocating motion.

The cover 22 has a curved surface 221 formed downwardly concave downward in the center portion opened in the front-rear direction so that the connecting bar 32 can be inserted. The lower surface of the cover 22 is formed with an insertion hole 222 through which the bolt is inserted at a position corresponding to the threaded portion 21.

The first and second sliding members 23 and 24 each have a semicircular cross section, and are made of a material having a low coefficient of friction so that the seat plate 20 can smoothly reciprocate linearly.

Meanwhile, as shown in FIG. 5, the cover 22 is preferably formed to be inclined obliquely toward the rear lower portion to disperse the force acting between the seat plate 20 and the connection bar 32.

As shown in FIG. 5, the legs 30 are connected across the upper part of the support part 31 and the support part 31 supporting the lower surface of the seat plate 20 so as to support the seat plate 20 using a metal material. It is provided with a plurality of connecting bars (32).

The support part 31 is formed by bending a metal rod a plurality of times or by welding a plurality of metal rods to have strong durability.

The connecting bar 32 is coupled across the upper end of the support 31, it is shown in Figure 2, but may be provided with one or three or more depending on the size of the chair and the weight of the user.

As the cover 22 is coupled to the connecting bar 32 from the lower part of the seat plate 20, the connecting bar 32 is positioned to penetrate the coupling space 22 ′ to guide the seat plate 20 linearly reciprocating forward and backward. In addition, the front and rear sides of the upper surface is provided with a stopper 33 is installed to limit the linear reciprocating range of the seat plate 20.

Frame 40 is a horizontal arm connected across to connect a pair of vertical bar 41 and a pair of vertical bar 41 formed integrally connected to the upper end of the rear support portion 31 of the leg 30 (42) is provided.

The vertical bar 41 and the horizontal arm 42 may be welded to the upper end of the rear support part 31, but may be integrally formed with the rear support part 31 so as to stably support the rotational movement of the backrest 50. It is preferable to bend and form a sieve.

The support part 31 formed on the rear side of the vertical bar 41 and the leg 30 is preferably formed to be bent so as to protrude convexly toward the front so as to correspond to the shape of the backrest 50 so as to have a substantially '<' shape.

The horizontal arm 42 is coupled to the coupling hole 52 of the coupling member 51 formed in the backrest 50, and serves as a rotation axis during the rotational movement of the backrest 50. To this end, the horizontal arm 52 is preferably formed by bending the central portion slightly protruded toward the rear lower portion than both sides.

The backrest 50 is manufactured in a shape corresponding to the waist and the back of the user integrally with the seat plate 20 using a synthetic resin material to provide an elastic force to perform a cushioning operation while supporting the back and the back of the user.

And the backrest 50 is formed to be bent toward the convex toward the front and at the same time the front of the backrest 50 is formed to be round to surround the user's back, providing a comfortable fit.

In addition, the backrest 50 has a plurality of coupling members 51 formed to protrude from the rear center portion and coupled to the horizontal arm 42 of the frame 40.

Coupling member 51 is formed to protrude from the back of the backrest 50, a coupling hole 52 that is recessed in a semi-circular shape to the upper side so that the horizontal arm 42 of the frame 40 is coupled to the bottom, The lower end of the rear side of the coupling member 51 is provided to protrude toward the rear is provided with a fixing protrusion 53 for fixing so that the horizontal arm 42 coupled to the coupling hole 52 does not fall out.

On the other hand, the upper part of the seat plate 20 and the backrest 50 is preferably attached to the seat 60 made of fabric to provide a comfortable fit to the user when seated on the chair.

In addition, as shown in FIG. 5, the chair according to the preferred embodiment of the present invention further includes a lower cover 70 coupled to the lower portion of the seat plate 20 to shield the cover 22 and the connection bar 32. Equipped.

By coupling the lower cover 70 to the lower portion of the seat plate 20 as described above, the present invention prevents foreign matter from flowing between the connecting bar and the first and second sliding members positioned in the coupling space of the cover to smoothly seat the seat plate. Allow linear reciprocating motion.

Next, the coupling relationship of the chair according to the preferred embodiment of the present invention.

First, as shown in FIGS. 4 to 6, the metal rod body is bent a number of times to form the rear support part 31 and the frame 40 integrally.

When viewed from the side, the support 30 is formed in the front and rear sides so that the legs 30 can stably support the lower surface of the seat plate 20, and the connecting bar 32 between the upper ends of the support portions 31 in the front and rear sides. Join by welding.

Subsequently, the seat plate 20 and the backrest 50 which are integrally formed are positioned at positions corresponding to the horizontal arms 42 of the legs 30 and the frame 40, and a force is applied downwardly from the top to the back of the backrest 50. The horizontal arm 42 is coupled to the coupling hole 52 of the plurality of coupling members 51 formed in the coupling hole 52.

Then, since the fixing protrusion 53 is formed at the rear lower end of the coupling member 51, the horizontal arm 42 is stably fixed to the coupling hole 52.

After the first and second sliding members 23 and 24 are positioned on the upper and lower surfaces of the connecting bar in the state in which the backrest 50 and the horizontal arm 42 are coupled, the cover 22 is covered with the cover 22. Insert the bolt through the insertion hole 222 of the coupling to the screw portion (21).

At this time, the upper surface of the first sliding member 23 is in contact with the lower surface of the seat plate 20, both lower end surfaces are seated on the upper surface of the second sliding member 24, the lower surface of the second sliding member 24 is It is seated on the curved surface 221 of the cover 22.

Accordingly, a through space equal to or slightly larger than the diameter of the connecting bar 32 is formed in the center of the first and second sliding members 23 and 24, so that the friction force between the connecting bar 32 and the seat plate 20 is reduced. According to the seat plate 20 can be linear reciprocating movement along the connecting bar 32 during the rotational movement of the backrest (50).

Subsequently, the lower cover 70 is coupled to the lower portion of the seat plate 20 to shield the cover 22 and the connection bar 32.

Next, the operation of the chair according to the preferred embodiment of the present invention will be described with reference to FIG. 7.

7 is an operation state diagram of a chair according to an embodiment of the present invention.

As shown in FIG. 7, when the user sits on the seat plate 20 and leans back and waist to the backrest 50, the user backs the back, the backrest 50 is centered on the horizontal arm 42 coupled to the back. It is turned to the rear side and the lower part is rotated while being pulled forward.

Accordingly, the seat plate 20 integrally formed with the backrest 50 is linearly moved forward.

At this time, as the first and second sliding members 23 and 24 are installed on the upper and lower surfaces of the connection bar 32 coupled to the lower surface of the seat plate 20, the seat plate 20 can move smoothly in the front-rear direction.

Thus, when the user leans back the waist, the backrest 50 rotates and at the same time the seat plate 20 moves forward to support the user's back and waist comfortably using elastic force to perform a cushioning action. .

Subsequently, when the user folds his / her back, the chair according to the preferred embodiment of the present invention is returned to its original formation by the elastic force of the backrest and the seat plate.

Through the process as described above, the present invention can protect the user's back and waist by forming a seat plate and the backrest integrally to perform a cushioning operation during the rotational movement of the backrest as the user's posture changes.

The scope of the present invention is not limited to the embodiments described above, but is defined by the claims, and various changes and modifications can be made by those skilled in the art within the scope of the claims. It is self evident.

In the above embodiment, but described as the lower cover is coupled to the lower portion of the chair, the present invention is not necessarily limited thereto.

8 is a perspective view of a chair according to another embodiment of the present invention.

As shown in FIG. 8, the present invention may remove the lower cover 70 coupled to the lower portion of the seat plate 20, and install the rotating leg 30 ′ to change the seat plate 20 to be rotatable. have. At this time, the rotating leg 30 'may be provided with a height adjusting means for adjusting the height of the seat plate 20.

And the present invention, as shown in Figure 8, the frame 40, the seat plate 20, may be modified to have an armrest 80 on one side or both sides of the rotating leg 30 '.

20: seat 21: screw
22: cover 23, 24: first and second sliding members
30: leg 31: support portion
32: connecting bar 33: stopper
40: frame 41: vertical bar
42: horizontal arm 50: backrest
51: coupling member 52: coupling hole
53: fixing protrusion 60: sheet
70: lower cover

Claims (6)

Seat,
A leg formed by bending a metal rod under the seat plate to support the seat plate and having a pair of support bars coupled to the front and rear sides of the seat plate, and a connecting bar connecting the pair of upper parts of the support plate;
A frame having a pair of vertical bars connected to the rear top of the leg and connected to the rear top of the leg, and a horizontal arm connecting across the top of the pair of vertical bars;
It is formed integrally with the seat plate and includes a backrest for rotating movement about the horizontal arm,
The backrest is formed to protrude from the rear and has a coupling member coupled to the horizontal arm,
The seat plate is moved back and forth along the connecting bar by the rotational movement of the backrest,
The lower surface of the seat plate is provided with a plurality of pairs of threaded parts are formed on the inner peripheral surface,
Covering the screw portion of each pair and the cover is formed through the center portion is coupled so that the connection bar is coupled,
The cover has a curved surface concave formed in the center portion which is opened to insert the connection bar,
First and second sliding members are installed between the lower surface and the connecting bar of the seat plate and between the connecting bar and the curved surface.
On the upper surface of the connecting bar is provided a pair of stoppers spaced apart by the linear movement distance of the seat plate,
A lower portion of the coupling member is recessed to couple the horizontal arm to form a coupling hole.
The coupling member is a chair characterized in that it has a fixing protrusion formed to protrude to the rear lower end of the coupling member to fix the horizontal arm coupled to the coupling hole.

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