KR200435301Y1 - Tension adjustment structure of chair back - Google Patents

Abstract

The present invention relates to a chair, and a cushion portion as a seat for a user, a back support portion for supporting the back of the user, a rear support portion for supporting the backrest portion and the ground, and the cushion portion, the backrest portion and the rear portion. In the structure of the chair including a leg supporting the support portion, the plurality of the backrest portion and the rear support portion, the plurality of tension adjustment portion for fixing the rear support portion while elastically adjusting the distance to the backrest portion is further provided; The tension adjusting part includes a shaft portion coupled to the backrest portion through the rear support portion, and formed at an end portion of the shaft portion and exposed to a rear surface of the rear support portion to rotate the shaft portion in a forward and reverse direction, thereby supporting the rear support portion and the backrest portion. Adjusting bolt having a head for adjusting the separation distance between; At least one spring that imparts tension to the operation of the adjustment bolt; And while shielding the shaft portion and the spring of the adjustment bolt from the outside, it characterized in that it comprises a corrugated pipe that can contract and expand along the longitudinal direction of the shaft portion.

In this way, not only can be used in accordance with the structure of the human body, but also does not put a strain on the upper body to maintain a more comfortable sitting position, easy to assemble and disassemble by parts, excellent strength and durability can be enhanced will be.

 Chair, rear support, tension, tension adjustment, injection

Description

Tension controller structure of chair back

1 is a perspective view of a chair according to an embodiment of the present invention,

FIG. 2 is a schematic side view of FIG. 1, respectively, illustrating a coupling embodiment of a column of a chair back fastening portion and a leg portion;

Figure 3 is a schematic perspective view of the backrest in the chair according to another embodiment of the present invention,

Figure 4a is a plan view of the back portion at the time of initial seating in the chair with the back portion shown in Figure 3,

4B is a plan view showing the arrangement of the backrest part after sitting;

5A and 5B are partial side views of a chair having a backrest of a conventional dual pack type, respectively,

Figure 5c is an enlarged view of the main portion of the back fastening portion of Figure 5a,

* Explanation of symbols for the main parts of the drawings

10: cushion portion 16: back portion

16a ~ 16c: Backrest part 18: Rear support part

22: tension adjustment unit 24: adjustment bolt

26: spring 28: corrugated pipe

40: leg 42: column

44: shock absorber 46: outer cover

47: boss part 50: foot part

51: central body portion 53: connecting portion

55: end tab 57: moving wheel

The present invention relates to a chair, and in more detail, can be used not only in accordance with the structure of the human body, but also does not strain the upper body can maintain a more comfortable sitting posture, convenient to assemble and disassemble parts, The present invention relates to a chair having excellent strength and enhanced durability.

A chair is a kind of furniture used to sit on a chair. The basic structure of such a chair is composed of a seating portion called a cushion portion and a leg portion and a back portion supporting the chair.

Of course, in some cases it is coupled to the top of the backrest may have a headrest supporting the head.

These chairs are divided according to their shape, structure, materials and processing techniques.

Depending on the type, there are a chair without a back, a small chair, an arm chair, an armchair, a sopa, a bed chaise long chair, and a rocking chair. Looking at the use of the office, learning, meals, meeting chairs, etc. There are also a special use for haircuts, beauty, medical, theater, etc.

The structure of the chair is fixed, rotary, foldable, and combination type. In terms of the materials used, there are wooden chairs, metal chairs, plastic chairs, etc. According to the processing technology, wood can be bent or molded into plywood. Or chairs made of steel pipes or aluminum are known.

On the other hand, the function of such a chair is, above all, a health function is important so that the body does not feel overwhelming when used.

Therefore, in addition to the chair as a means of simply sitting in the chair, the shape of the cushion part is manufactured in a waveform according to the shape of the hips of the user based on the ergonomic design, or the back part of the body is changed to make the back of the human body more comfortable. Various techniques have been proposed, such as to support the same.

As an example, Korean Patent Office registration number 20-0245168 (seat with a backrest), notification number 1991-0004413 (stool with the structure of the center bar is inserted), notification number 20-0211495 (chair backing structure), notification number 20-10179560 (a chair back having a pressing means) and the like are known.

They are all proposing more comfortable and comfortable chairs by structural changes to the corresponding parts of the chair.

However, most of the chairs known in the art, including the above-described techniques, have been part-by-part due to the fact that the central rod (corresponding to the following column) is fitted by a press-in method or the legs of the chair are prefabricated. There are disadvantages such as inconvenient assembly or weak strength in part.

A general conventional chair will be described again with reference to FIGS. 5A-5C.

As shown in Figure 5a, the conventional chair is projected to both sides from the top of the backrest frame (5) which is freely angled at the rear of the cushion plate (4) having an armrest (2) and a cushion (3) The elastic means 8 is fixed between the bridge 6 and the back plate 7.

In the above configuration, when the user sits on the chair and leans against the backrest 1, the inner surface of the backrest 1 is pressed by the central part of the back while the elastic means are twisted so that the edge of the backrest 1 is the outer part of the user's back. Will be wrapped.

In the prior art as described above, since each component is separated to fix the elastic means to the back plate 7 and back to the back frame 5, the assembly and productivity are not good because they have many components.

In the case of the elastic means, the fixing part is made of hard material and the torsional working part is made of soft material, which has many problems such as being damaged (damaged) due to the separation phenomenon when used for a long time.

In addition, as shown in Fig. 5a, 5b, the upper region of the leg portion 9, that is, the sober directly presses into the engaging portion 4a provided in the lower portion of the cushion plate 4, the leg portion 9 Not only is not easy to assemble, but later, there is a problem that it is difficult to separate the leg portion 9 from the cushion plate (4).

In addition, as shown in Figure 5c, the backrest outer plate (1) is coupled to the middle side stand (6) by the rubber elastic body (8) at the back of the outer plate (1), its fastening is fastened by a simple bolt back ( The tension adjustment for 1) is practically weak.

Accordingly, the present applicant can be used to fit the structure of the human body as a means of simply sitting in accordance with this trend, as well as to fit the structure of the human body, and can maintain the sitting posture more comfortably without putting a strain on the upper body, assembling and It has come to propose a new type of chair that can be easily disassembled and has excellent strength and durability.

The purpose of the present invention, not only can be used in accordance with the structure of the human body, but also does not put a strain on the upper body to maintain a more comfortable sitting position, easy to assemble and disassemble by parts, excellent strength and durability to be strengthened It is to provide a chair that can.

The present invention for achieving the above object, the cushion portion as a seat for the user and the back portion for supporting the back of the user, the rear support portion for supporting the back and the back portion and the cushion portion, the backrest for the ground And a leg supporting the rear support part, wherein the plurality of tension adjustment parts secure the rear support part to the back support part while resiliently adjusting the rear support part to the back support part. The tension adjusting part further includes a shaft portion coupled to the backrest portion through the rear support portion, and formed at an end portion of the shaft portion and exposed to a rear surface of the rear support portion to rotate the shaft portion in a forward and reverse direction. Adjusting head to adjust the separation distance between the corresponding back part Agent;

At least one spring that imparts tension to the operation of the adjustment bolt; And

Shielding the shaft portion and the spring of the adjustment bolt from the outside, characterized in that it comprises a corrugated tube that can be contracted and expanded along the longitudinal direction of the shaft portion.

In addition, the backrest is concave from the front of the chair so as to support both shoulders side by side in a different position from the back of the user, respectively, the backrest is formed of two parts in a straight line when viewed from the top of the chair, the lower part of the The lower back is formed in a circular arc shape to support the waist, the rear support portion is provided in a substantially "S" shaped wave shape to support each of the plurality of backrest elastically from the rear It is done.

The leg portion includes a foot portion supported on the ground, and a column connecting the foot portion to the lower portion of the cushion portion.

The column may include a shock absorber having a sober body buffering the user's load and filled with gas or oil, and a sober rod whose length is expanded and contracted with respect to the sober body; And an outer cover that covers the shock absorber from the outside, wherein the sober body and the sober rod are screwed to the boss portion formed under the foot portion and the cushion portion, respectively.

The foot portion, the central body portion forming a center; A plurality of connecting portions radially connected radially outward from the central body portion and having at least one injection hole formed on a plate surface; End tabs provided at front ends of the connection portions; And a moving wheel coupled to the end tabs, wherein the center body portion and the end tab are each formed of plastic, and the connection portion is formed of a metal material, wherein the center body portion and the end tab are formed in a predetermined mold. The central body portion, the end tab, and the connecting portion may be integrated by integrally injection molding in a state where the connecting portion is inserted into the insert.

Hereinafter, with reference to the accompanying drawings will be described in detail for each embodiment of the present invention, in the description of each embodiment, the same reference numerals will be given to the same configuration.

1 is a perspective view of a chair according to an embodiment of the present invention, Figure 2 is a schematic side view of Figure 1 is a view showing various coupling embodiments for the column of the back fastener and the leg portion, respectively.

Referring to these drawings, mainly referring to Figures 1 and 2, the chair according to an embodiment of the present invention is large, armrests provided on both sides of the cushion portion 10 and the cushion portion 10 as a seating seat A part 12, a backrest portion 16 supporting the user's back, a rear support portion 18 supporting the backrest portion 16 from the rear, and a leg portion 40 supporting the chair as a whole against the ground. Equipped.

The cushion unit 10 is formed of a cloth material including a cushioning material therein. However, if necessary, it may be made of plateless plastic or steel plate.

Referring to the drawings, the cushion portion 10 is simply shown in a rectangular block shape, but if the upper surface of the cushion portion 10 has a wave shape that is constantly curved to fit the shape of the user's hips can sit more comfortably. have.

Armrest portion 12 is disposed on both sides of the cushion portion 10 serves to support both arms of the user.

The armrest portion 12 can adjust the height of the cushion portion 10 by the height adjustment pin 14 formed on its outer surface. Of course, the idea of the present invention can be applied to a chair (not shown) in which the armrest part 12 is not formed.

The backrest part 16 is arranged to extend upward from the rear of the cushion part 10 to support the user's back. That is, the user can lean on the back of the back portion 16 while sitting on the cushion portion 10 to take a more comfortable sitting posture.

Unlike the general chair (not shown), the backrest part 16 includes three backrest parts 16a to 16c in total.

The two backrest portions 16a and 16b disposed on the upper side support the left and right portions extending from both sides of the user's back center to the shoulders, and the one lower back portion 16c disposed below the user's back center region. Support the part leading to the waist. This will be described in more detail with reference to the following embodiments.

All of the backrest portions 16a to 16c form a constant wave shape (arc shape) so as to correspond to the back of the user.

In addition, the front of the back portion (16a ~ 16c) is formed of a constant elastic material to provide a more comfortable and comfortable cushioning when the back is in contact. The elastic material may be a cloth or rubber described above.

Each of the backrest portions 16a to 16c may be properly adjusted by the tension adjusting unit 22 to be described later. That is, the standing state or inclined state with respect to the cushion unit 10 can be easily adjusted by the tension adjusting unit 22 so that all users of different sizes or weights can use the body. I'm doing it. The structure and operation of the tension adjusting unit 22 will be described later.

The rear support part 18 is disposed at the rear of the back support part 16 which consists of three back support parts 16a-16c, and is utilized as a part which supports the back support part 16 from the back. Not only does it have a certain thickness, it is also manufactured so that it does not break or bend under the force of the user.

For reference, in the case of the conventional general chair (not shown), the part which serves as the rear support part 18 was simply taking plate shape, or was made into the small form of area.

However, when the rear support part 18 has a simple plate shape as described above, the higher the force that the user rests on the backrest part 16, the higher the risk that the rear support part 18 is bent, and thus the rear support part 18 There was a problem that the backrest part 16 does not properly perform the function because the backrest part 16 is not properly supported.

Thus, in the present embodiment, in order to alleviate all of these disadvantages, the rear support 18 is provided in a wave shape having an approximately "S" shape as shown in FIGS. 1 and 2.

The area of the rear support 18 is formed to span the entire three backrest portions 16a-16c. However, the area of the rear support part 18 may be smaller than that shown, and the rear support part 18 may be separately manufactured.

As such, the rear support part 18 is formed in a wave shape having an approximately “S” shape, and the rear support part 18 is supported by the back support part 16 even though the user leans against the back support part 16. ) Does not occur as in the prior art. Thus, the backrest 16 is sufficient to perform its function.

Of course, in addition to the morphological features, in order to faithfully perform the original function of supporting the backrest 16, it will be preferable that the rear support 18 itself is made of a material having a certain elasticity. In other words, the rear support 18 itself may be replaced by a leaf spring. On the other hand, the morphological features of the rear support 18 also contribute to improving the beauty of the appearance to the chair.

In the rear support 18 to support the three backrest portions 16a to 16c from the rear, the rear support 18 must be fixed to the three backrest portions 16a to 16c, of course, as described above. Each of the three backrest portions 16a-16c with respect to the posterior support 18 need to be elastically approached and spaced apart. This is enough for all users of different sizes or weights.

To this end, the rear support 18 and the three backrest portions 16a to 16c corresponding thereto, respectively, not only secure the rear support 18 to the corresponding backrest portions 16a to 16c, but also to the rear support 18. A tension adjusting unit 22 is further provided to adjust the tension by elastically adjusting the distance of each of the three backrest portions 16a to 16c.

Since the structure and operation of the three tension control unit 22 are all the same, it will be described based on the enlarged view of FIG.

As shown in FIG. 2, the tension adjusting unit 22 includes an adjusting bolt 24, a spring 26, and a corrugated pipe 28.

The adjustment bolt 24 is formed at the end of the shaft portion 24a and the shaft portion 24a coupled to the corresponding backrest portions 16a to 16c through the rear support portion 18 and exposed to the rear surface of the rear support portion 18. And the head portion 24b for adjusting the separation distance between the rear support portion 18 and the backrest portions 16a to 16c by rotating the shaft portion 24a in the forward and reverse directions.

Head 24b is preferably made of a form that can be operated by hand without a separate tool. In the form of a so-called knob, the head 24b may be formed. Therefore, referring to FIG. 1, only the head 24b is exposed on the rear surface of the rear support 18.

The spring 26 serves to give tension to the operation of the adjustment bolt 24. As shown, two may be formed or a larger number may be employed. Of course, the configuration may be excluded.

Corrugated pipe 28 serves to shield the outside of the shaft portion 24a of the adjustment bolt 24 and the spring 26 so that the spring 26 is not exposed to the outside. That is, as the shaft portion 24a is rotated by manipulating the head portion 24b of the adjusting bolt 24, the distance between the rear support portion 18 and the backrest portions 16a to 16c changes, so that the corrugated pipe ( 28) is provided.

On the other hand, the leg portion 40 is a portion that generally supports the chair to the ground, the foot portion 50 largely supported on the ground, and the column 42 connecting the foot portion 50 to the lower portion of the cushion portion 10 ).

Next, the column 42 will be described first. As shown in FIG. 2, the column 42 includes a shock absorber 44 which buffers a user's load, and an outer side of the shock absorber 44. It consists of an outer cover 46 to cover.

The shock absorber 44 is composed of a sober body 44a filled with gas or oil according to its position, and a sober rod 44b whose length is expanded and contracted with respect to the sober body 44a.

The shock absorber 44 is filled with oil or nitrogen gas inside the cylinder, and when the user sits on the cushion unit 10, the shock absorber 44 is slowly compressed to support the load of the user. Of course, on the contrary, when the user gets up from the chair, it slowly expands again.

The principle of the shock absorber 44 is to adjust the contraction of the spring, to prevent the spring shocked by the load to be repeatedly bounced up and down to allow the spring to return to its original state slowly.

The shock absorber 44 is divided into an oil shock absorber in which oil is filled in the cylinder, a gas shock absorber in which gas is filled, and the like. In this embodiment, any of the oil shock absorber and the gas shock absorber may be applied.

Conventionally, gas shock absorbers were first developed in comparison with oil shock absorbers. However, the shock absorbing effect is good and mass production is possible. However, when the high speed piston is operated, the oil is not sufficiently replenished, and thus the damping force is lowered.

The gas shock absorber was developed to compensate for the above-mentioned disadvantages of the oil shock absorber, and the damping force is stable, the durability is strong, and the grounding force is good.

Of course, the shock absorber 44 is also employed in the prior art. However, in the prior art, the end of the shock absorber 44, that is, the end of the sober rod 44b is directly inserted into the boss portion 47 formed at the lower end of the cushion portion 10 to be press-fitted.

However, if the end portion of the sober rod 44b is directly fitted to the boss portion 47 formed at the lower end of the cushion portion 10, the shock absorber 44 is not easy to be coupled, but also after the maintenance process. In the shock absorber 44 was a disadvantage that does not fall well.

Thus, the inventor has solved this by another application.

The foot part 50 is a part which supports a chair to the ground substantially. The foot portion 50 has a central body portion 51 forming a center, five connecting portions 53 radially connected radially outward from the central body portion 51, and at the distal ends of the connecting portions 53, respectively. End tab 55 is provided, and the movement wheel 57 is coupled to the end tabs (55).

Although five connecting parts 53 are shown in the drawing, the number of connecting parts 53 may be more or less than five.

Figure 3 is a schematic perspective view of the backrest in the chair according to another embodiment of the present invention, Figure 4a is a plan view of the backrest during initial seating in the chair with the backrest shown in Figure 3, Figure 4b is sitting It is a top view which shows the arrangement | positioning state with respect to the backrest part after.

As shown in these figures, in the chair according to another embodiment of the present invention the structure of the left and right back portion (100, 100 '), as shown in Figure 3, on the left side of the backrest 112 is the back ( It is relatively protruding than 113), and the center portion of the center portion is grooved in a round shape that can support the back in a plan view.

In addition, the groove is formed in a vertical line as viewed from the side to accommodate the left and right portions, and the upper and lower ends of the left and right backrest portions 100, 100 'are formed with curved curved portions 112a and 112b.
In other words, if you look at it from the top of the chair, the two backrests of the two chairs are semi-elliptical in cross section, and the inner sides of the backrests of the chairs are projected to support the backbone, respectively. The upper and lower ends of the backrest portion are formed in a straight line in a vertical direction so as to support the back to the bottom.

Referring to FIGS. 4A and 4B, the effects of the left and right backrest parts 100 and 100 ′ configured as described above will be described below.

As shown in Figure 4a, the seated person's back first touches the inside of the left and right backrest parts 100, 100 'protruding when the seated person is seated on the chair.

As described above, while the seated person's back touches the inner side of the left and right back parts 100 and 100 ', the inner side of the left and right back parts 100 and 100' is pushed backward, and the outer side of the left and right back parts 100 and 100 'is pushed forward. As a result, the left and right backrest parts 100 and 100 'may move to fit the body shape of the seated person so as to support the seat and the back of the seated person.

In this state, as shown in FIG. 4B, when the seated person comes into close contact with the left and right back parts 100 and 100 ′, the inside of the protruding left and right back parts 100 and 100 ′ is pushed backward and the left and right back parts 100 and 100 ′ The outer side of the protruding to the front portion to move the left and right back portion (100, 100 ') to fit the body structure of the seated person can not only give comfort and comfort to the seated person can also protect the spine. Reference numerals 20 and 20 'are elements for supporting the left and right backrest parts 100 and 100' and may serve as the above-described tension adjusting part 22.

As such, according to the present embodiment, not only can be used according to the structure of the human body, but also does not put a strain on the upper body to maintain a more comfortable sitting posture, convenient to assemble and disassemble by parts, excellent strength and durability There is an effect that can be enhanced.

As such, the present invention is not limited to the described embodiments, and it is apparent to those skilled in the art that various modifications and variations can be made without departing from the spirit and scope of the present invention. Therefore, such modifications or variations will have to belong to the claims of the present invention.

As described above, according to the present invention, not only can be used in accordance with the structure of the human body, but also does not strain the upper body to maintain a more comfortable sitting posture, convenient to assemble and disassemble by parts, and excellent strength Durability can be enhanced.

Claims (2)

A chair including a cushion portion as a seat for a user, a back support portion for supporting the user's back, a rear support portion for supporting the back support portion, and a leg portion for supporting the cushion portion, the back support portion and the rear support portion with respect to the ground. In the structure of, The back support parts and the rear support part supporting both shoulders are further provided with a plurality of tension adjusting parts for fixing the rear support part while resiliently adjusting the distance to the back part, and the tension control part passes through the rear support part. An adjustment bolt having a shaft portion coupled to the backrest portion and a head portion formed at an end of the shaft portion and exposed to a rear surface of the rear support portion to rotate the shaft portion in a forward and reverse direction to adjust a separation distance between the rear support portion and the backrest portion; At least one spring that imparts tension to the operation of the adjustment bolt; And a pleated tube that shields the shaft portion and the spring of the adjustment bolt from the outside and is contractable and expandable along the longitudinal direction of the shaft portion. According to claim 1, wherein the backrest is viewed from the top of the chair so that the back of the user can support both shoulders side by side in different positions, each of the two chair back portion is a semi-elliptical cross section of each of the two chair back portion The inner side is projected to support the backbone, and the upper and lower ends of the backrest part are formed in a straight line in a vertical direction so that the entire backrest part supports the back from the top to the bottom. The lower back is formed to support the waist, the rear support portion is provided in a substantially "S" shaped wave shape characterized in that it supports each of the back portion to support both shoulders elastically from the rear chair.

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