KR101967182B1 - Tilt type folding chair - Google Patents

Abstract

The folding chair according to the present invention has a leg connected in a downward direction, and the front leg extends upward and is folded downward to have a U-shape, and the rear leg extends downward; A circular shaft having a space formed therein across the horizontal portion of the leg, a fixing member provided at a central portion of the shaft and fixed to the shaft in the shaft, and fixed to the inside of the circular shaft through the fixing member to the outside Square bars protruding a predetermined length, provided at both ends of the square bar, the fitting body can be fitted to both ends and the torsion rubber coupled thereto, the outer groove of the torsion rubber and the outer groove of the fitting can be fitted A tilting portion of the back frame having a first circular hole and a second circular hole; Rotating shafts protruding on the inside of the extension lines of both back frame, inner side surface is perforated in a circular shape so as to be combined with the rotating shaft of the back frame on both sides of the side of the seat frame. To allow the rotational folding to the side, so that the bent portion of the front leg portion having the U-shape supports the seat frame; The back part is formed with grooves to be fastened with the upper part of the back frame and are coupled to each other by fastening bolts. The back frame is characterized by having an elastic material for elastic movement.

Description

Folding chair {Tilt type folding chair}

The present invention relates to a structure of a folding chair, the backrest and the seat plate is designed in such a structure that can move integrally, specifically the tilting structure of the general chair produced mainly using a torsion bar more simple, easy to assemble The manufacturing unit also relates to a structure for tilting the back of the folding chair and the seat that can be significantly lowered.

In general, the chair is coupled to the back plate and the seat plate to form a predetermined angle, the lower plate of the seat forms a structure that is coupled.

Furthermore, in order to improve the comfortable use quality, chairs are continuously developed to implement a tilting structure in which the back plate is inclined at a predetermined angle from the seat plate according to the load transmitted from the user, and in recent years, the seat folding chair has excellent space utilization. Has been released chairs that combine a variety of functions according to the purpose of the office working environment.

Folding chair having such a tilting function is typical of the Republic of Korea Patent No. 10-1101874 and there are a number of other patents.

The registered patents are currently commercialized as a technology for realizing the tilting of the chair upper body by using a torsion bar having an elastic force mainly used in the automobile field.

1A is a perspective view of a chair disclosed in Korean Patent No. 10-1101874 regarding a folding chair in which an upper body of a representative chair using a torsion bar is tilted.

Referring to FIG. 1B, the tilting chair is provided with a seat plate 20 and a back plate 30, and supports the seat plate 20 and the back plate 30, and includes a main shaft 40, a back frame 130, and legs. 10 is provided. In detail, the main shaft 40 is configured to have a length in the width direction of the chair, the lower leg 10 is provided, the upper portion is configured to support the seat plate 20, both ends of the back frame 130 This connection is made up.

Here, the main shaft 40 and the back frame 130 are connected to each other by a tilting means. That is, referring to FIG. 2, the torsion bar 120 is parallel to the main shaft 40 by passing through the fixing bracket 112 that is inserted into the center of the main shaft 40 and fixedly fixed to the fixing bolt 166. Combination is configured, the back frame 130 is axially coupled to both ends of the torsion bar 120 facing the end of the main shaft (40).

Due to this configuration, when the user presses the back plate 30 backward, the torsion bar 6 is coupled to the back frame 130 with the center portion coupled with the fixing bracket provided at the center of the main shaft 40. Torsion is applied in the section leading to, the torsion bar 120 is connected to the back frame 130 in accordance with the torsion action of the torsion bar 120 is inclined backward and elastically supported, when the user's pressing force is removed, the torsion bar By the restoring force of 120, the back plate 30 connected to the back frame 130 forms a structure to return to the initial position.

However, this conventional tilting chair has the following problems.

First, since the tilting action of the back of the conventional tilting chair depends solely on the torsion of the torsion bar, according to the initial design of the torsion bar, the backing is always kept elastically supported with a constant force, and for some users, the tilting If the torsion bar is too strong to be fully retracted, and excessive pressing force is applied to the back plate, the torsion bar may be damaged due to the large torsional load acting in proportion to the torsion bar. Due to the change in the restoring force of the bar, there is a problem that the back plate cannot be returned to the initial position.

In addition, the torsion bar 120 is a manufactured product made of the order to make the set value, the manufacturing cost is high, which increases the overall manufacturing cost, the back frame 130 is coupled to both ends according to the rigidity of the torsion bar and also the torsion bar 120 In order to endure the rigidity of the metal castings, metal molding is used, which also leads to an increase in manufacturing cost, and it is difficult to replace it when it is broken because it is firmly fixed due to the principle of interlocking metals. There is this.

In addition, the tilting method of the folding chair applied to the patent is engaged in the projection groove 172 of both ends protruding below the movement main shaft 40 of the seat plate is rotated in the direction of the backrest 30, but when the user is seated It is extended and supported by the main shaft 40 and is fixed. Accordingly, the torsion bar 120 and the back frame 30 are coupled to each other so that the movement of the backrest 130 is fitted to the extension coupling shaft 134 of the back frame 30. Since the tilting is done horizontally downward, when the user leans backwards, the seat plate is fixed and the backrest is leaned backwards, resulting in uneven distribution of the load. Back pain is triggered.

In addition, because the posture of the seated person is flipped by a simple horizontal movement, when the user tilts from side to side due to the movement of the center of gravity due to the twisting of the seated posture, the seated person artificially postures in the form of a folding chair. It should be fit and cause a lot of fatigue when sitting for a long time.

In order to solve such a problem, a number of chairs having a backrest of a chair capable of adjusting the intensity of tilting have been recently released, but the manufacturing cost increases due to the large number of parts for the tilting of the backrest and a complicated configuration. According to the prior patent research of the invention, there is no invention of the technology in which the majority of the chairs simultaneously move the backrest and the seat plate.

Patent Document 1: Korea Patent Registration No. 10-1101874 Patent Document 2: Korea Patent Registration No. 10-1294994 Patent Document 3: Korea Patent Registration No. 10-1623726 Patent Document 4: Korea Patent Registration No. 10-1052217

The present invention is designed to solve various problems of the related art as described above, and the manufacturing cost can be reduced by simplifying the configuration by minimizing the number of existing parts for tilting the back portion, and also the movement of the back and seat plate According to the user's posture to provide a folding chair that can effectively cope with the movement of the center of gravity as well as fluid movement.

The folding chair of the present invention for solving the above technical problem is the back frame is connected to the leg portion in the downward direction and the circular shaft formed with a space therein, a square bar provided in the inner hollow of the circular shaft, the center portion of the square bar As a back frame of the chair is provided and is fixed to the center of the circular shaft, and provided at both ends of the square bar, including a torsion rubber having a groove that can be fitted to both ends of the square bar, The shaft portion provided inside the lower end of the back frame can be configured to be coupled to the outer groove portion of the torsion rubber, the back frame of the present invention is to be connected to the backrest.

At the rear end of the lower end of the back frame, a shaft is formed that can be horizontally coupled with the rear side of the seat plate. The rear end of the seat plate is horizontally coupled with the shaft of the back frame so that the seat plate can be folded in a circular shape so that the seat can be folded. And, it is preferable to configure the seat plate support on the front leg so that the seat plate can support the movement according to the weight of the user.

In addition, the back plate connected to the upper portion of the back frame is preferably to have an elastic material for effective and elastic movement.

The folding chair according to the preferred embodiment of the present invention has a flexible seat plate having elastic movement and a back plate having elastic force, and a freely driven torsion structure and independent tilting between the frames. Through the organically connected configuration to allow for twisting, it is possible to flexibly support various load distributions for each part of the user individually and independently, thereby providing a comfortable chair to reduce the fatigue of the user.

In addition, the present invention can be implemented through a simple structure of the above-described individual or independently driven elastic support configuration, it is easy to reduce the cost in the manufacturing process and economics.

Figure 1a is a shape view of the seat plate folding chair according to the prior art.
Figure 1b is an exploded view showing the seat folding chair according to the prior art.
2 is an exploded view showing the seat folding chair according to the present invention.
3 is a detailed view showing a coupling structure of the tilting device of the seat folding chair of FIG.
Figure 4a is a view showing a process in which the circular shaft and the square bar, the fitting body, the elastic rubber of the tilting device of Figure 3 is integrally coupled to the tilting portion of the backrest frame.
4B is a cross-sectional view illustrating a state in which the tilting apparatus of FIG. 3 is integrally coupled.
5 is a view showing that the seat frame is horizontally coupled with the back frame and is rotated upward to the back part, and the support shaft formed on the bottom surface of the seat frame and the support grooves supporting the front leg.
Figure 6 is a view showing a state in which the back frame is coupled to the back plate.
Figure 7a is a side view showing a folding chair seated by the user.
Figure 7b is a side view showing the angle change of the back plate and the seat plate when the user leans back seated folding chair.
Figure 8 is a rear view showing the movement when the folding chair seated by the user is twisted.

The following drawings, which are attached to this specification, illustrate exemplary embodiments of the present invention, and together with the detailed description of the present invention, which serve to more effectively understand the technical spirit of the present invention, the present invention is described in these drawings. It should not be construed as limited to matters.

Therefore, the embodiments described in the specification and the drawings shown in the drawings are only the most preferred embodiments of the present invention and do not represent all of the technical idea of the present invention, various equivalents that may be substituted for them at the time of the present application It should be understood that there may be water and variations.

As shown in FIG. 2, the seat folding chair according to the preferred embodiment of the present invention includes a leg part 1000, a tilting part 2000, a seat plate part 3000, and a back part 4000.

First, the leg portion 1000 of the present invention is fixed to each of the longitudinal direction of the circular shaft 101, the hollow is formed, the front leg 105 is extended upward and then bent downward to have a '∩' shape, In the rear is formed a hind leg 106 extending downward. Leg portion 1000 may be provided with a caster 109 at the ends of the front leg 105 and the rear leg 106, but this is not essential.

The circular shaft 101 horizontally placed on the leg portion 1000 is formed so that both ends of the end is opened, the incision groove 103 is dug in the center portion can be inserted into the fixing pin 104, the square bar 102 When horizontally penetrating the circular shaft 101, the center thereof can be fixed to the fixed pin 104 by fixing the length of both sides protruding of the square bar (102). The square bar 102 is an axis fixed for the tilting part 2000 which will be described later, and the shape thereof may be modified.

As shown in FIG. 3, the tilting part 2000 of the present invention is fitted with the fitting body 201 and the elastic body 204 coupled with the rectangular bars 102 protruding from both ends of the circular shaft 101, and engaged with the fitting body 2000. The back frame 200 is composed of.

The fitting body 201 has a rectangular hollow that can be fitted with the outer circumferential surface of the center square bar 102 so as to be combined with the square bar 102, and the jaw is formed in a circular outer circumferential surface, the square bar ( 102 and it is fitted to each other by pushing the both ends of the circular shaft 101 is fixedly coupled. The jaw of the fitting body 201 is provided with a plurality of tilting angle setting grooves 203, the jaw of the fitting body 201 is fitted with the first circular hole 206 of the back frame 200 is fitted , The tilting angle setting groove 203 is engaged with the tilting shaft 207 in the first circular hole 206 is fitted.

In addition, the elastic body 204 is provided with a rectangular hollow that can be engaged with the outer circumferential surface of the center rectangular bar 102 so that the elastic body 204 can be engaged with the rectangular bar 102 penetrated through the inner hole after the fastening of the fitting body 201. Insert and protrude out of the fitting, which is shown in FIG. 4A.

Thereafter, a plurality of elastic fixing grooves 205 are provided on the outer circumferential surface of the protruding portion of the elastic body 204 so that the outer circumferential surface is engaged with the second circular hole 208 of the back frame 200 to be coupled later. 209 is fixedly coupled.

As shown in FIG. 4B, the cross-sections engaged and engaged as described above are illustrated. The elastic body 204 and the elastic body fixing shaft 209 provided in the second circular hole 208 of the back frame 200 in the elastic body fixing groove 205 provided in the outer peripheral shape protruding the rectangular bar 102 and And the tilting shaft 207 provided in the first circular hole 206 of the back frame 200 is coupled to each other with the tilting angle setting groove 203 provided in the jaw of the fitting body 201. To provide a rotation angle with elastic restoring force only as long as the length of the grooves dug into the circumferential surface of the tilting angle setting groove 203, and the rotational force generated at one end does not affect the other end, so the rotational force or twisting at both ends It is possible to provide individual resilient restoring forces with respect to each other.

The present invention is such that the tilting unit 2000 and the other frame of the present invention to be described later to be coupled to each other organically coupled frame frame 200 is based on the seating direction of the chair and the seated person as shown in each drawing It is preferable to have a shape protruding in the rear direction, and due to the configuration that the back frame 200 is fitted to each of the left and right ends instead of an integral type, the rotational force generated individually or together is effectively transmitted, so that it is physically sufficiently supported. It is preferred to be of suitable size and length.

In addition, the back frame 200 formed on the left and right may be implemented in a variety of shapes or shapes, the protrusion direction may also have a shape that protrudes in various directions, including the direction inclined upward from the rear in consideration of the overall shape of the chair. It can also include parts for a variety of purposes, such as armrests and book rests.

As shown in FIG. 5, the seat plate part 3000 according to the present invention is configured to be horizontally coupled to the extension lines of the back plate frame 200 at both ends, and specifically, at both inner rear sides of the seat plate frame 300. A circular rotary shaft coupling groove 301 is provided, and the other end of the rotary shaft coupling groove 301 is protruding, and both of the back frame 200 are protruding grooves 210 at the inside of the rear portion extending. The protrusion is horizontally engaged by using a horizontal fastening bolt 302 that is in contact with the other end of the rotary shaft coupling groove 301 of the seat plate frame 300 and engaged with the outer circumferential surface of the rotary shaft coupling groove 301.

In addition, the tilting part 200 of the back frame 400 due to the horizontally coupled seat plate frame 300 and the back frame 400 prevents the detachment of the components by the horizontal coupling is made without a separate fastening means.

The seat plate frame 300 described above is horizontally coupled to the upper rotatable structure in the direction in which the back frame 400 is fastened, as shown in FIG.

In addition, the seat plate frame 300 is preferably provided with a support shaft 303 protruding in a straight line at the lower front part for weight distribution of the seated person, the support shaft 303 is bent by the ∩ of the forelimb 105 described above. It is preferable to be placed in the support groove 107 provided on the upper part of the excitation to effectively distribute the weight of the seated person, the support groove 107 described above is the support shaft 303 of the seat plate frame 300 is seated When it is placed in the support groove 107 of the front front leg 105 to be provided with a U-shaped groove to prevent the departure.

The support groove 107 prevents the left and right departure of the seat plate frame 300 when the seated person is seated on the seat plate, and may correspond to a change in the movement of the seat plate 3000 according to the posture of the seater.

The back plate 4000 is a state in which the leg part 1000, the tilting part 2000, and the seat plate part 3000 are fastened to the back plate fastening groove 401 provided at both ends of the back plate 400, as shown in FIG. 6. At the back of the back frame frame 200 is fitted with a fastening bolt 402 is matched with the back fastening portion 211. Here, the back plate 4000 is preferably made of a polymer material such as plastic so as to physically support the seated person and at the same time have a restoring force or elasticity by elasticity or shape deformation due to its own distortion.

The fastening structure of the seat plate part 3000 of the present invention described above is configured such that the seat plate frame 300 coupled to the tilting part 2000 is physically mutually connected to each other in accordance with the tilting angle of the back frame 200. Thus, the seating posture of the seated person or the behavior of the movement may be provided in consideration of the movement, and the movement thereof is shown in FIGS. 7-A and 7-B.

7A shows the angle of the chair when the user is first seated.

The black line indicated in FIG. 7B represents the original angle of the folding chair, and the red line represents the back movement of the back portion 4000 and the seat portion 3000 simultaneously when the user is seated and leans back.

Finally, as shown in FIG. 8, the folding chair designed in the above structure shows the movement when the seated person's posture is twisted, and the tilting part 2000 having elasticity independent of both sides of the chair described above has elasticity. When combined with the backboard 4000 shows the appearance of its own twisting interaction.

The present invention described above has been described by way of limited embodiments and drawings, but is not limited thereto, and the technical spirit of the present invention and the scope of the patent will be described by those skilled in the art to which the present invention pertains. It is to be understood that various modifications and variations are possible within the scope of equivalents, and that various modifications may be possible.

1000: leg portion 2000: tilting portion 3000: seat plate portion
4000: climbing part 200: climbing frame 300: seat frame
101: circular shaft 201: fitting body 301: rotating shaft coupling hole
102: square bar 203: tilting angle setting groove 302: horizontal fastening bolt
103: cutting groove 204: elastic body 303: support shaft
104: fixing pin 205: elastic body fixing groove 400: back frame
105: front leg 206: first circular hole 401: back fastening groove
106: rear leg 207: tilting shaft 402: fastening bolt
107: support groove 208: second round hole
109 caster 209 elastic body fixed shaft
210: protrusion groove
211: back fastening

Claims (8)

Circular shaft 101 with a space formed therein in the downward direction of the seat plate,
A fixing pin 104 having a square hole fixed to a central portion of an inner space of the circular shaft 101,
Square bar 102 is fixed through the interior of the circular shaft 101 and the fixing pin 104,
A fitting hole 201 having a square hole formed at a center thereof and fitted to both ends of the square bar 102, fixedly coupled to an inner circumferential surface of the circular shaft 101, and having a tilting angle setting groove 203 formed on the outer circumferential surface thereof.
An elastic body 204 which is fitted to the inner circumferential surface of the fitting body 201, has a square hole through which the square bar 102 can pass, and a plurality of elastic body fixing grooves 205 are formed on the outer circumferential surface thereof.
A first circular hole 206 having a tilting shaft 207 that can be fastened to the tilting angle setting groove 203 of the fitting body 201 and a plurality of elastic fixing grooves 205 formed in the elastic body 204. Folding chair characterized in that it comprises a pair of back frame (200) having a second circular hole (208) is provided with an elastic fixing shaft (209) that can be fastened to. delete delete delete The method of claim 1,
Leg portions 1000 fixedly installed on both sides of the circular shaft 101 in the longitudinal direction, respectively;
Protruding groove 210 provided inside the extension line of the back frame 200;
A seat plate frame 300 having horizontally coupled rotating shaft coupling holes 301 at both ends thereof and being horizontally fastened to protruding grooves 210 at both ends of the backplate frame 200;
Folding chair, characterized in that it comprises a back plate portion 4000 is engaged with the back fastening groove portion 401 of the extension line end of the back frame 200. The method of claim 5,
The front side of the leg portion (1000) is a folding chair characterized in that it is extended and then bent down to have a U-shaped shape when viewed from the side having a support groove (307) on the bent portion. The method of claim 5,
The seat plate frame 300 has a rotating shaft coupling hole 301 is formed to protrude outwardly at both ends to be horizontally fastened, so that the seat plate frame 300 is fastened and coupled to a part of an extension line of the back plate frame 200, and the back plate portion 4000 is formed. Folding chair, characterized in that rotatably installed toward. The method of claim 5,
The back frame 200 is a folding chair characterized in that it has an elastic material.

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