KR20060102925A - Tilting structure of backrest - Google Patents

Abstract

The present invention relates to a tilting sphere of the backrest support which allows the backrest to flow elastically.

The tilting structure of the chair back according to the present invention includes a seat plate support casing in which a seat plate support for supporting a seat plate is coupled to a lower center, a cylindrical frame seated in front of the seat plate support casing, and a lower end of each backrest support in both opening ends, and a cylinder. A bracket which is inserted through both ends of the frame and has a spring insertion groove on the side of the insertion end, a plate-shaped elastic member which penetrates through the cylindrical frame and is connected to the spring insertion groove of the bracket, and both ends and the bracket of the cylindrical frame. The side cap is in close contact with the outer peripheral surface of the protruding end, and the side cap cover is coupled to the outermost side of the side cap by a separate fixing means.

Seat, backrest, seat support, cylindrical frame, leaf spring, bracket, side cap

Description

Tilting structure of backrest

1 is a perspective view of a chair showing the flow support structure of the conventional backrest

Figure 2 is a bottom perspective view of a chair equipped with a tilting structure according to the present invention.

Figure 3 is an assembled perspective view of the chair back tilting structure according to the present invention.

Figure 4 is a cross-sectional view of the chair back tilting structure of the present invention.

5 and 6 are longitudinal cross-sectional views of the chair back tilting structure according to the present invention;

5 is a longitudinal cross-sectional view taken along the line A-A of FIG.

6 is a longitudinal cross-sectional view taken along line B-B in FIG.

Figure 7 is a side view showing an operating state of the chair back tilting structure according to the present invention.

((Explanation of symbols for main part of drawing))

                11. Seat 14. Backrest

                20. Seat support 30. Cylindrical frame

                40. Leaf spring 50. Bracket

                60. Side cap 70. Side cap cover

                80. Bush P. Joint

The present invention relates to a tilting structure of a chair back for allowing the backrest to flow elastically, and more particularly, a cylindrical frame is seated on a seat plate support for supporting a seat plate, and both open ends are coupled to lower ends of each back support. The present invention relates to a tilting structure of a chair back in which a plate-shaped elastic member is inserted into a cylindrical frame.

As the living culture of modern people is gradually westernized, the time spent on sitting on the chairs increases due to the spread of sedentary living cultures.In particular, the office workers or students spend most of their time sitting on the chairs. This is getting bigger.

As a result, the chairs that are currently being produced are more and more functional elements that allow the seated person to sit comfortably as well as the exterior design, and provide various types of cushions for each chair to comfortably support the seat and the back of the seated person. There is a chair available.

A general chair includes a plurality of legs supported on the ground, a seat plate horizontally mounted to support the buttocks of the seat at the upper end of the leg, and a back support for supporting the seat of the seat of the seat at the upper end of the vertical support extending from the rear bottom of the seat. Consists of.

In the case of a parish chair, it must be manufactured at a relatively low price, and since it consists only of a wooden board, a leg made of steel pipe, and a backrest fixed at an angle of 90 ° to the seat, the flow structure of the backrest is not considered at all. I can't do it.

1 is a perspective view of a chair in which a pivoting support structure of a backrest of a conventional chair is shown. As shown in the drawing, a conventional chair 1 is parallel to the ground at an upper end of a leg 2 supported on the ground, and thus a seat plate part ( 3) is coupled and the support means (4) with a spring is built in the back side of the seat plate (3), one end is coupled to the rear of the support means (4) is vertically extended to the upper back of the seat plate (3) The backrest 5 is coupled to the upper end of the vertical support (6).

At this time, the seat plate part 3 and the backrest 5 flow within a predetermined range with respect to the load applied from the seated person by a spring (not shown) mounted in the support means 4, so that the seated position of the seated person's comfortable seating is secured. It is configured to be guided, and the seat plate part 3 and the backrest 5 flow simultaneously or separately through the support means 4.

Conventionally, the chair is elastically flown by the spring member inside the support means 4 supporting the seat plate 3 while the backrest 5 is rolled back due to the load of the seat occupant, which is the spring of the support means 4. The member is mainly configured to be able to adjust the flow angle of the backrest (5) by the adjustment of the rotary rod (7) is built in the compression spring wound in the form of a coil and protrudingly coupled in front of the support means (4).

The conventional chair having such a structure has a rotating rod coupled to the front of the support means 4 to support the elastic force against the load applied by the seated person to the back when the backrest 5 is flowed by an elastic spring installed inside the support means 4. It is pointed out that the rotation bar 7 must be adjusted in accordance with the physical condition or the seating posture of the seated person because it can only be adjusted to 7).

In addition, when the tightening strength of the rotating rod 7 is increased, the tension strength of the spring is inevitably increased, so when leaning against the backrest with a load less than the tension of the spring, the elastic back effect of the backrest may not be exhibited, making it difficult to sit for a long time. There is this.

In addition, when the load is more than the tension of the spring or sudden external shock is applied to the spring may be damaged, there is a hassle to have to replace the parts every time the spring is damaged.

On the other hand, when the chair is used for a long time or used in a place where there is a lot of external moisture, there is a problem in that parts must be replaced periodically because rust occurs on the outer circumferential surface of the spring or noise gradually increases.

Accordingly, the present invention was devised to solve the above-mentioned disadvantages and problems in the elastic flow structure of the chair back, and the cylindrical frame is seated in front of the seat plate support for supporting the seat plate and plate-shaped into the inside of the cylindrical frame. The object of the present invention is to provide a tilting structure of the chair back so that the seating load of the seated person applied to the backrest can be supported by the elastic member of the elastic member so as to support the seating position of the seated person. There is this.

The above object of the present invention is a seat plate support casing, the seat plate support for supporting the seat plate is coupled to the lower center, the cylindrical frame seated in front of the seat plate support casing and the lower end of each back support is bound to both opening ends, and a cylindrical frame Bracket is inserted through both ends of the bracket having a spring insertion groove on the side of the insertion end, the plate-like elastic member through the cylindrical frame and both ends are fixed to the spring insertion groove of the bracket, protruding both ends and the bracket of the cylindrical frame It is achieved by the tilting structure of the chair back consisting of a side cap is tightly coupled to the outer peripheral surface of the end, and the side cap cover is coupled to the outermost side of the side cap by a separate fixing means.

The seat plate support casing is provided with a support insertion hole for supporting the bottom surface of the seat plate at the top and inserting and fixing the top of the seat plate support at the lower center thereof, and is provided with a semi-circular frame seating groove in which the cylindrical frame is seated at the front.

The cylindrical frame inserted into the frame seating groove of the seat plate support casing has a plate-shaped elastic member inserted therein in the longitudinal direction, and the central portion of the cylindrical frame has a narrow fixing part having a narrow cross section so that the rotation of the elastic member is restricted in the cylindrical frame. do.

The pair of brackets inserted into both ends of the cylindrical frame has a spring insertion groove formed at the insertion end side thereof so that both ends of the plate-shaped elastic member fastened on the spring insertion groove can be fixed to the outside of the bracket. The side cap is attached to both sides of the bracket and the cylindrical frame and the side cap cover for closing the outer end of the bracket is mounted.

As described above, in the chair back tilting structure according to the present invention, the load applied to the backrest is transferred to the cylindrical frame fixed to the front of the seat plate support casing of the bottom of the seat plate through each back support, and the plate-shaped elastic member inserted and mounted inside the cylindrical frame. When the torsional stress is generated and the load of the backrest is removed, the torsional stress is released by elasticity of the elastic member inside the cylindrical frame, so that the original state of the backrest is restored.

Matters relating to the effects of the present invention including the technical configuration of the chair back tilting structure will be clearly understood by the following detailed description with reference to the drawings in which preferred embodiments of the present invention are shown.

First, Figure 2 is a bottom perspective view of a chair equipped with a tilting structure according to the present invention, Figure 3 is an assembled perspective view of the chair back tilting structure according to the present invention, Figure 4 is a cross-sectional view of the chair back tilting structure of the present invention, Figure 5 and 6 are longitudinal cross-sectional view of the chair back tilting structure according to the present invention, Figure 5 is a longitudinal cross-sectional view of the line AA of Figure 4, Figure 6 is a longitudinal cross-sectional view of the line BB of Figure 4, Figure 7 is a chair according to the present invention This is a side view showing the operating state of the backrest tilting structure.

As shown, the tilting structure of the chair back of the present invention is supported by a seat plate 11 supported at a predetermined height from the ground by a plurality of legs 12 and a back support 13 extended to the rear of the seat plate. In the chair 10 formed of the backrest 14, the seat plate support 15 for supporting the seat plate 11 is coupled to the seat plate support casing 20 through the support insertion hole 21 of the lower center portion, the seat plate A cylindrical shape consisting of a narrowing part 31 fixed to the semicircular seating groove 22 of the support casing 20 and having a lower end of each back support 13 coupled through both opening ends and a central part having a narrower cross section than both sides. A frame 30, at least one leaf spring 40 inserted into the cylindrical frame 30, and a spring insertion groove 51 mounted at both ends of the cylindrical frame 30 and provided at the side of the insertion end. Through the leaf spring (40) An additional binding bracket 50, a pair of side caps 60 in close contact with both ends of the protruding end 52 and the cylindrical frame 30 of the bracket 50, and the outer side of the side cap 60 Side cap cover 70 is coupled to the end.

The seat plate support casing 20 is coupled to the bottom surface of the seat plate 11 by separate fixing means before and after the upper portion and extends to the upper portion of the plurality of legs 12 through the support insertion hole 21 provided in the lower center. The upper end of the seat plate support 15 formed is inserted and fixed so that the seat plate 11 and the backrest 14 coupled to the rear of the seat plate 11 are supported at a predetermined height from the ground.

In addition, the seat plate support casing 20 has a semi-circular seating groove 22 is formed to cross the left, right in front of the cylindrical frame 30 is seated thereon and each back support on both open ends of the cylindrical frame 30 The lower bend of 13 is coupled.

On both ends of the cylindrical frame 30, a rectangular pin insertion hole 32 is provided, and a pair of brackets 50 formed with spring insertion grooves 51 are mounted through both open ends thereof, and the cylindrical frame 30 is mounted. The other end side of the bracket 50 protrudingly coupled to both sides of the) is penetrated and coupled to the lower bent portion of each back support 13.

The bracket 50 is coupled so that the pin insertion hole 53 provided at the insertion end side corresponds to the pin insertion hole 32 provided at both end sides of the cylindrical frame 30, and the pin insertion hole 53 and 32 It is fixed to prevent the separation of the bracket 50 to both ends of the cylindrical frame 30 through the coupling means (P) such as pins or rivets are inserted through.

At this time, the pin insertion hole 53 of the bracket 50 is formed in such a size that the coupling means (P) such as pins can be forcibly fitted and the pin of the cylindrical frame 30 correspondingly coupled with the pin insertion hole 53. The insertion hole 32 is configured to have a rectangular shape, and the bracket 50 is rotated by the length of the rectangular pin insertion hole 32 in a state in which the bracket 50 is coupled to the inside of the cylindrical frame 30.

In addition, between the bracket 50 and the inner circumferential surface of the cylindrical frame 30, a cylindrical bush 80 formed of a soft synthetic resin material and having a through hole 81 formed therein is inserted into the outer circumferential surface thereof, whereby the inner circumferential surface of the frame 30 and the bracket ( 50) The generation of contact noise caused by the direct contact of the outer circumferential surface is prevented.

In addition, a bolt coupling hole 54 is formed at the protruding end of the bracket 50 so that the protruding end of the bracket 50 is firmly mounted to one side of the lower bent portion of the backrest support 13, and fixing means such as bolts. (B) is combined.

On the other hand, at least one plate spring 40 is inserted into the cylindrical frame 30, both ends are fixed to the spring insertion groove 51 of the bracket 50 mounted on both sides of the frame 30, the bracket The plate-like rotation is made in the cylindrical frame 30 together with the bracket 50 by the external force transmitted from the (50).

The leaf spring 40 maintains a state in which both sides of the central portion are in contact with the inner circumferential surface of the narrow fixing portion 31 formed in the center portion of the soil-like frame 30, thereby causing the leaf spring 40 to rotate by the brackets 50 on both sides. Due to the narrow fixing part 31 of the cylindrical frame 30 during the rotation of both sides of the rotation of the central portion of the leaf spring 40 is torsional stress is generated at both ends of the leaf spring (40).

At this time, the external force for rotating the plate spring 40 inside the cylindrical frame 30 and the bracket 50 attached to both ends thereof is supported by the backrest support 13 through which the protruding end side of the bracket 50 is coupled. It is transmitted from the load applied to (14).

The torsional stress generated in the leaf spring 40 is maintained while the load is applied to the backrest 14, and when the load applied to the backrest 14 is removed, the stress of the leaf spring 40 inside the cylindrical frame 30 is removed. While unwinding, the bracket 50 coupled to both ends of the cylindrical frame 30 is rotated in the opposite direction to restore the backrest support 13 and the upper back 14 coupled to the protruding end of the bracket 50 to their original state. Let's go.

In addition, both ends of the cylindrical frame 30 on which the bracket 50 is mounted are mounted with a protruding end 52 of the bracket 50 and a side cap 60 that surrounds the welding portion of the frame 30 and the backrest support 13. On the outer surface of the side cap 60, the side cap cover 70 for coupling the bracket 50 and the backrest support 13 and finishing the welded portion is coupled.

And, on the side portion of the side cap 60 to prevent the separation of the coupling means (P) such as the pin inserted through the end of the cylindrical frame 30 and the pin insertion hole 32, 53 of the bracket 50. The side plate 61 is slidingly coupled.

As described above, the tilting structure of the chair back of the present invention allows the tilting strength of the backrest to be adjusted by the torsional stress generated in the leaf spring inside the cylindrical frame to which the backrest support is coupled with respect to the load that the seat back rests on the backrest. However, there is an advantage that can induce a comfortable sitting posture of the seated person.

In addition, the present invention has the advantage that the rotational noise of the backrest can be significantly lowered because the tilting of the backrest is made only by the plate-like elastic member that is rotated inside the cylindrical frame fixed to the front of the seat plate support.

Claims (8)

In the chair consisting of a seat plate, a leg supporting the seat plate and a backrest for supporting the back portion of the seated occupant at the rear of the seat plate, a seat plate support 15 extending above the plurality of legs 12 is inserted into the support center of the lower center. A seat plate support casing 20 coupled to the bottom plate 21 of the seat plate 11 is seated in front of the seat plate support casing 20, and both open ends are coupled to the lower bent portions of the backrest support 13. And a cylindrical frame 30 having a narrow fixing part 31 at a central portion thereof, at least one plate-like elastic member 40 inserted into the cylindrical frame 30, and inserted at both ends of the cylindrical frame 30. And a spring insertion groove 51 having both ends of the elastic member 40 fixed to the insertion end side, and having a pin insertion hole 53 formed at one side thereof, and a protruding end portion of the bracket 50. 52) and surround both ends of the cylindrical frame (30) A pair of tilting structure of the side cap 60, and the chair back, characterized by a cap comprised of a side cover 70 mounted to the distal end of the side the cap 60 is. According to claim 1, The seat plate support casing (20) tilting structure of the chair back, characterized in that the semi-circular seating groove 22 is formed in which the cylindrical frame 30 is fixedly coupled to the front. The tilting structure of the chair back according to claim 1, wherein a rectangular pin insertion hole (32) is provided at both end sides of the cylindrical frame (30). The chair back according to claim 1 or 3, wherein the coupling means (P) is inserted through the pin insertion hole (53) of the bracket (50) and the pin insertion hole (32) of the cylindrical frame (30). Tilting structure. The tilting structure of the chair back according to claim 4, wherein the coupling means (P) is composed of pins or rivets. The tilting structure of the chair back according to claim 1, wherein a cylindrical bush (80) having a through hole (81) is inserted between the bracket (50) and the inner circumferential surface of the cylindrical frame (30). The tilting structure of the chair back according to claim 1, wherein the elastic member is composed of a leaf spring. The tilting structure of the chair back according to claim 1, wherein the side plate (61) is slidably coupled to the side portion of the side cap (60).

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