KR101397958B1 - A compact, collapsible, swivel camping chair - Google Patents

Abstract

Disclosed is a collapsible chair which comprises an upper tube, a leg tube, a central tube connector and a seat. The upper tube is formed from a detachable section. The lower end portion of the upper tube is inserted into a hole in the central tube connector, and the upper end portion of the leg tube is inserted into a lower hole in the central tube connector. The upper end portion of the upper tube is fit into a tube receptor of a back seat. The upper tube part except the upper end portion and the lower end portion does not get in contact with any part of the collapsible chair. An upper hole of the central tube connector is arranged in an upper body which rotates on a lower body having a lower hole. The upper tube passes through the upper body and the lower body, but rotates around a cylinder which does not extend upward or downward from the central tube connector. The collapsible chair according to the present invention is compact-sized, lightweight and strong and can be stably used on the uneven ground surface outdoors during camping, hiking, fishing, outdoor concerts or sports events.

Description

{A COMPACT, COLLAPSIBLE, SWIVEL CAMPING CHAIR}

The present application claims the benefit of United States patent application Ser. No. 14 / 040,633, filed on September 28, 2013, the contents of which are incorporated herein by reference in their entirety for all purposes. .

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a folding chair, and more particularly, to a folding chair that can be conveniently carried by camping, fishing, outdoor concerts, sports events and the like.

Portable chairs are convenient for outdoor activities where the seat is unavailable. Folding chairs commonly used at home to save space are portable for most outdoor activities such as camping, hiking, fishing, outdoor concerts and sporting events. Not enough to use.

Portable chairs for outdoor activities should be lightweight and compact. For example, chairs used for hiking or camping should be accommodated for backpacks and should not give users loads.

Common tube and canvas folding chairs used in outdoor sporting events are simple, too big, and heavy to carry around on a hike. Thus, smaller and lighter folding chairs can be more conveniently used in outdoor events that are a short distance from the user's car trunk.

As prior art, Fig. 1 shows an assembled lightweight folding chair 10 suitable for hiking and camping. This foldable chair 10 is assembled with approximately two tube connectors 11 of molded plastic. A tube of metal 12 is inserted into the opening in the tube connector 11 to assemble the foldable chair 10. And the other end of the tube 12 is inserted into the corner pocket of the canvas seatback 13.

Fig. 2 also shows the disassembled state of the folding chair 10 of Fig. Referring to this, the tube 12 can be removed from the tube connector 11 and folded into the canvas seatback 13. Thus, the foldable chair 10 can be conveniently folded into a small bag or backpack.

However, such a conventional folding chair 10 is disadvantageous in that it is unstable for use in a general uneven floor of the outdoors, especially in outdoor activities such as camping, hiking, fishing, sporting events and concerts.

In other words, although the right legs are spaced relatively far from the left legs, the front legs are still relatively close to the hind legs, so the person sitting on the chair can fall back.

In addition, although a rigid metal frame of the same size as a chair can provide more stability, the lightweight metal tube 12 can be bent to some degree depending on the weight of the occupant, There is a tendency to move back and forth between both ends.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and it is an object of the present invention to provide a folding chair which is compact, lightweight, and robust, and is suitable for stable use on an uneven surface of the outdoors.

In order to solve the above-described problems, the present invention provides an air conditioner comprising: a plurality of upper tubes having a lower end and a seat end; A plurality of leg tubes having an upper end; A seat back having a plurality of tube receptacles; And a center tube connector having a plurality of upper holes and a plurality of lower holes, wherein a lower end of the upper tube is detachably connected to the center tube connector by being inserted into the upper hole, The upper end of the upper tube is detachably connected to the center tube connector by being inserted into the lower hole, the seat end of the upper tube is detachably connected to the tube receptacle, and the upper tube No part of the folding chair provides contact with the folding chair.

At this time, each of the upper tubes is also made of detachable sections.

In addition, the lower end of each of the upper tubes is also characterized by a dimension sized to fit snugly into the corresponding upper hole.

In addition, the plurality of upper tubes are formed of four tubes, and the seat end is also coupled to the inside of the tube receptacle at four corners of the seat back.

Of course, the seat back is also made of a fabric.

In addition, the center tube connector has an upper body rotating on the lower body, a cylinder passing through the center of the upper body and the lower body is coupled, the upper hole is disposed in the upper body, And is disposed on the lower body.

Here, the cylinder includes: a cylinder body connected to the center of the upper body and the lower body; A first screw portion connected to an upper side of the cylinder body and having a screw thread formed on an outer periphery thereof and screwed to an upper portion of the upper body; And a second screw part connected to a lower side of the cylinder body and having a screw thread formed on an inner periphery thereof and bolted to a lower part of the lower body.

A ring-shaped thrust bush is provided on the lower surface of the upper body. A radial bushing (53a) is provided on the lower side of the upper body so as to surround the outer periphery of the cylinder body. And a lock washer is provided on the outer periphery of the bolt.

Furthermore, the upper tube is also characterized by its rotation about a cylinder not extending above or below the center tube connector.

The center tube connector is also in the form of a sphere.

The plurality of upper tubes are composed of two tubes of a first length and two tubes of a second length, and the first length is also longer than the second length.

Further, the present invention is also characterized in that it further comprises an elastic cord passing through one of the upper holes and passing into one of the upper tubes.

In addition, the upper tube has a reinforcing tube inserted into the lower inner side, and the reinforcing tube is inserted and coupled inside the upper tube.

The present invention also relates to an air conditioning system comprising: a plurality of upper tubes having a lower end and a seat end; A plurality of leg tubes having an upper end; A seat back having a plurality of tube receptacles, the seat end of the upper tube being detachably connected to the tube receptacle; And a connecting portion for detachably connecting the upper tube to the first portion, the connecting portion including a second portion to which the leg tube is detachably connected, and a first portion to be rotated on the second portion, Providing a folding chair in which no part of the upper tube other than the lower end is in contact with the connecting means.

At this time, an elastic cord passing through one of the upper tubes and passing into the connecting means is also characterized.

In addition, each of the upper tubes is also characterized by being composed of detachable sections.

In addition, the lower end of each of the upper tubes is also characterized by a dimension sized to fit snugly into the hole in the first section.

In addition, the plurality of upper tubes are composed of two tubes of a first length and two tubes of a second length, and the first length is also characterized by being longer than the second length.

In addition, the apparatus may further include a bottom support having a bottom plate and a plurality of insertion pockets having a number corresponding to the number of the leg tubes at the edge of the bottom plate, .

Further, the present invention provides a method of manufacturing a top tube, comprising: forming a plurality of upper tubes having a lower end and a sheet end, the upper tubes being comprised of sections; Forming a plurality of leg tubes having an upper end; A plurality of upper holes and a plurality of lower holes are formed in the center tube connector, and a lower end of the upper tube has a dimension sized to fit into the upper hole, and an upper end of the upper tube is fit to the lower hole Forming a dimension to be dimensionally connected; And forming a seat back having a plurality of tube receptacles for connection on the seat end of the upper tube.

Here, the center tube connector has an upper body that rotates on a lower body, the upper hole is disposed on the upper body, and the lower hole is disposed on the lower body.

The method further includes inserting the upper tube, the leg tube, the center tube connector, and the seat back into the interior of the storage bag.

In addition, the method further comprises the step of pulling the elastic cord through one of the upper holes into one of the upper tubes.

In addition, each of the upper tubes is also characterized by being composed of detachable sections.

The folding chairs according to the present invention are compact, lightweight and robust, and are effective for stable use in uneven surfaces of the outdoors in camping, hiking, fishing, outdoor concerts and sporting events.

BRIEF DESCRIPTION OF THE DRAWINGS The accompanying drawings illustrate embodiments of the invention with the same reference numbers used for the same elements.
1 is a perspective view of a folding chair assembled around two spaced-apart tube connectors in the prior art.
Fig. 2 is an exploded view of the components of the folding chair of Fig. 1 before assembly. Fig.
3 is a perspective view of a folding chair according to the present invention.
Fig. 4 is a front perspective view of the folding chair of Fig. 3; Fig.
Figure 5 shows the upper tube, the leg tube and the center tube connector of the folding chair of Figure 3 in a folded state;
Figure 6 shows the folding chair of Figure 3 for illustrating the assembly process.
Fig. 7 is a perspective view of the folding chair of Fig. 3 before the seat back is placed on the upper tube from above. Fig.
8 shows a person sitting on a folding chair of Fig. 3; Fig.
9 shows a central tube connector of one embodiment of a folding chair having five leg tubes.
Figure 10 shows the interior of the center tube connector of Figure 9;
11 is a perspective view showing an embodiment of a folding chair in which the center tube connector is one unit and does not rotate;
12 is a perspective view showing another embodiment of a folding chair in which a center tube connector is formed in a spherical shape;
Figure 13 illustrates the spherical center tube connector of Figure 12 in greater detail;
Figure 14 shows a variation of the embodiment of Figure 12 in which the center tube connector is a large diameter sphere.
Figure 15 is a flow chart illustrating the steps of a method of making the foldable chair of Figure 3;
16 is a view showing a folding chair provided with a floor support portion;

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

Figure 3 shows a compact collapsible chair 20 in an assembled state. The folding chair 20 is easily disassembled and can be put into a small bag having a length of 30 cm or less.

The foldable chair 20 also includes four upper tubes 21-24, four leg tubes 25-28, a central tube connector 29 and a seat back ; 30).

At this time, the upper tube 21-24 and the leg tubes 25-28 are hollow tubes. In addition, the upper tube 21-22 has detachable upper and lower sections, and the upper tube 23-24 has detachable upper, middle and lower sections.

The center tube connector 29 has an upper portion 31 that rotates on a lower portion 32.

These upper tubes 21-24, leg tubes 25-28 and the center tube connector 29 are made of lightweight yet strong aluminum. Therefore, the foldable chair 20 is suitable for outdoor activities such as hiking and camping, because it is light in weight and compact so that it can enter into a small bag.

The upper tube 21-24 has a lower end and a seat end. The lower end of the upper tube 21-24 is inserted into four upper holes 46a in the upper body 31 and is detachably connected to the center tube connector 29. [

The upper ends of the leg tubes 25-28 are inserted into the four lower holes 46b in the lower body 32 and are detachably connected to the center tube connector 29. [

The seat ends of the upper tubes 21-24 are detachably connected to tube receptacles 33-36 at four corners of the seat back 30, respectively.

The tube receptacles 33-36 are configured such that the seat end of the upper tube 21-24 slides into it and the fabric is made of a webbing sewed pocket wherein the fabric is limited to one particular But may be made of various kinds of fabrics such as polyester, nylon, acrylic, polyurethane, or the like.

These tube receptacles 33-36 are glued or stitched to the fabric of the seat back 30. In the assembled state of the foldable chair 20, the portion of the upper tube 21-24 other than the lower end portion and the sheet end portion does not contact any portion of the foldable chair 20. The bottom end of the leg tube 25-28 is held on the ground.

Fig. 4 is a perspective view of the foldable chair 20 seen from the front, showing that the seatback 30 is unfolded such that the tube receptacles 33-36 fit on the seat ends of the upper tubes 21-24.

Thus, in the assembled state, the upper tube 21-24 is in a state of slight tension pulling the seat end together. The seat back 30 is made of a sewn piece of woven fabric such as a canvas.

Figure 5 shows the top tube 21-24, the leg tube 25-28 and the center tube connector 29 in a folded state. All of these tubes 21-28 are out of the holes in the central tube connector 29.

In addition, the section of the upper tube 21-24 is completely open. The elastic cord 37 passes through all the tubes and through the hole in the center tube connector 29. The elastic cord 37 tends to pull the tube section into the other tube section and pull the tube into the hole in the center tube connector 29.

The end of the resilient cord 37 is attached into the seat end of the upper tube 21-24 or inside the end plug 38 that fits into the bottom end of the leg tube 25-28.

One elastic cord is passed through the hole in the center tube connector 29 from one end of the tube and out from the end of the other tube.

Therefore, there are four elastic bands. One end of the elastic cord 37 is attached to the inside of the end plug 38 which is fitted into the seat end of the upper tube 22 and the other end of the elastic cord 37 is connected to the upper tube 21 The end plug 38 is inserted into the sheet end of the sheet.

The elastic cord 37 is passed from the tube through one of the upper holes 46a in the upper body 31 and out of the other upper hole 46a in the upper body 31 and into the upper tube 21.

One end of the shorter elastic cord 39 is attached to the inside of the grounding plug 40 at the bottom end of the leg tube 25 while the other end of the elastic cord 39 is attached to the leg tube 26 at the other end, To the grounding plug (41). A shorter elastic cord 39 passes through the two holes in the lower body 32.

Fig. 5 also shows the hexagonal head bolt 42 used to pivotally connect the power section to the upper body 31. Fig. The bolt 42 is screwed into the cylinder 49 passing through the center of the upper body 31 and the lower body 32. [

Fig. 6 shows the assembled foldable chair 20. When the tubes 21-28 and the center tube connector 29 are removed from their bags, the elastic cord tends to pull the removable tube section in a straight line and tend to pull the tube into the hole in the center tube connector 29 have.

The user then aligns the tube section with the hole and the tube is pulled into the center tube connector 29. Each longer upper tube 23-24 has a lower, middle and upper section. For example, the upper tube 23 has a lower section 43, a middle section 44 and an upper section 45, as shown in FIG.

The lower inch of the lower section 43 has an outer diameter smaller than the rest of the lower section 43. The lower portion having a smaller outer diameter is snugly fitted into the upper hole 46a in the upper body 31 of the center tube connector 29. [ The lower portion 47 of the middle section 44 and the lower portion 48 of the upper section 45 have an outer diameter smaller than the remainder of the section. Each lower portion 47-48 is about 2 inches long. The lower portion 47 of the middle section 44 having a smaller outer diameter is fitted over the upper portion of the lower section 43 and the lower portion 48 of the upper section 45 having a smaller outer diameter is inserted into the middle section 44). The upper tube 23-24 with three sections has a first length that is longer than the second length of the upper tube 21-22 with only two sections. The longer upper tube 23-24 supports the back of the seat back 30 while the shorter upper tube 21-22 supports the seat of the seat back 30 as the user's leg is laid.

7 is a perspective view of the foldable chair 20 before the tube receptacle at the corner of the seat back 30 is covered from above on the seat end of the upper tube 21-24. 7 shows that the upper tube 23-24 is longer than the upper tube 21-22. As seen from the top of FIG. It can be seen that the cylinder 49 passes through the center of the upper body 31 and the lower body 32. The upper body 31 rotates pivotally on the lower body 32 with respect to the axis passing coaxially through the cylinder 49. [ The bolt 42 keeps both ends of the cylinder 49 close to each other around the upper body 31 and the lower body 32. The upper tube 21-24 and the upper body 31 rotate about the short cylinder 49 and do not extend beyond the top or bottom of the center tube connector 29

Figure 8 shows the occupant 50 sitting on the assembled foldable chair 20. Figure 8 shows how the foldable chair 20 according to the invention rotated is more stable than the folding chair 10 of the prior art of Figure 1 with a tube connector 11 spaced apart in two.

The upper body 31 of the foldable chair 20 according to the present invention can be rotated to align the seat and the upper tube 21-24 with the occupant's leg resting on the ground. The two legs of the center tube connector 29 and the occupant 50 form a stable three point base. The leg tubes 25-28 have space in close contact with the ground and act as a single support on a three point basis with the occupant's legs and feet.

However, in the foldable chair 10 of the prior art, the seat can not be rotated so that it is aligned with the occupant's foot. Thus, the occupant's foot is less likely to support the weight of the occupant, and is inevitably dispersed evenly through the four legs of the chair. The strength of one tube leg connected to the plastic tube connector 11 is sometimes insufficient to support most of the weight of the occupant and the tube leg is bent at a flat angle so that the plastic tube connector 11 can no longer be held do. On the other hand, in the foldable chair 20, all the weight of the occupant dispersed on the center tube connector 29 is evenly distributed on all the leg tubes connected to the lower body 32 of the center tube connector 29. The rotation function of the center tube connector 29 operates with the help of the occupant's feet. The foldable chair 20 is not rotated when the occupant's foot rises from the ground.

9 shows a central tube connector 29 of one embodiment of a foldable chair 20 having five leg tubes. The five leg tubes provide more strength and stability than the four leg tubes. Figure 9 shows two of the four holes in the upper body 31 before the upper tube is inserted into the hole. The lower end of the upper tube has a size that fits snugly in the hole. For example, FIG. 9 shows an upper hole 46a into which the detachable lower section 43 of the upper tube is inserted.

10 shows the center tube connector 29 in more detail. In Fig. 10, the upper body 31 is separated from the lower body 32, which exposes the inside of the center tube connector 29. The upper body 31 and the lower body 32 are made of a rigid aluminum cylindrical member having a hole. The central coaxial hole is completely drilled through the upper body 31 and accommodates the cylinder 49. Another central coaxial hole is partially drilled through the lower body 32 and accommodates the bottom of the cylinder 49. Smaller diameter holes are formed in the bottom of the partially apertured center hole.

The cylinder 49 includes a cylinder body 49a and a first screw portion 49b having a male thread formed on the cylinder body 49a and a second screw portion 49c having a female screw thread formed on the lower side of the cylinder body 49a. .

At this time, the cylinder body 49a is connected through the center of the upper body 31 and the lower body 32, and the first screw portion 49b is threaded on the outer periphery on the upper side of the cylinder body 49a And the second screw portion 49c is connected to the lower side of the cylinder body 49a and formed with a thread on the inner periphery thereof and bolts to the lower portion of the lower body 32 , The center tube connector 29 causes the upper body 31 to rotate about the axis of the cylinder 49 on the lower body 32.

A ring-shaped thrust bushing 54 is provided on the lower surface of the upper body 31. A radial bush 53a is provided on the lower side of the upper body 31 with a cylinder body 49a, And a further radial bushing (DU BUSH) 53b which is fitted to surround the outer periphery of the second threaded portion 49c is provided on the inner side of the lower body 32 so that the upper tube and the leg tube And the bolt 42 is screwed with the second threaded portion 49c of the cylinder 49 from the outside of the lower body 32 through the hole of a smaller diameter so that the cylinder 49 can be fixed to the upper So as to be held in the groove in the upper portion of the body (31).

Fig. 10 also shows four tube tubes 21-24 but only two tube holes passing through the bottom surface of the upper body 31. Fig. The upper tube 23-24 supporting the back of the seat back 30 is connected to the upper body 31 at an angle more perpendicular than the upper tube 21-22 supporting the seat of the seat back 30. [

Thus the holes for the tubes 23-24 go through the bottom surface of the upper body 31 while the holes for the tubes 21-22 exit into the coaxial hole in the middle of the upper body 31. [ For example, FIG. 10 shows that the upper hole 46a for the tube 23 passes through the bottom surface of the upper body 31. The small grooves are made between the outgoing holes through the bottom surface so that the resilient cords can pass through both holes without protruding over the bottom surface of the upper body 31. [ 10 also shows that the holes for the five leg tubes all go into the partially open center hole in the lower body 32, since the leg tube is also connected at an angle to the lower body 32 at a flat angle.

11 is a perspective view of one embodiment of a foldable chair 20 in which the center tube connector 29 is a unit and does not rotate. Not only the lower hole 46b for the leg tube but also the upper hole 46a for the upper tube are drilled into a single member 55 of aluminum. A central hole is formed in the single piece (55) of aluminum from the bottom. The hole for the tube goes into the center hole. Elastic cords passing from the upper tube to the other upper tube and from one leg tube to the other leg tube are routed through the central hole.

12 is a perspective view of another embodiment of a foldable chair 20 in which the center tube connector 29 is in the form of a sphere 56. Fig. The foldable chair 20 of Fig. 12 has only three leg tubes 57-59.

13 is a view showing the sphere 56 of FIG. 12 in more detail. The upper hole 46a for the upper tube 21-24 as well as the lower hole 46b for the leg tubes 57-59 are all formed into the sphere 56 of aluminum. When all the tube holes meet at the center of the sphere, the center hole does not need to pass through the aluminum sphere 56. The resilient cord can be passed directly from one tube hole to another tube hole. The elastic cord for the leg tube 59 is connected in the middle of the cord passing between the leg tube 57 and the leg tube 58.

Fig. 14 shows the variation of the embodiment of Fig. 12, in which the center tube connector 29 is spherical with a large diameter. In the embodiment of FIG. 5, only the lower inches of the lower section of the upper tubes 21-24 fit within the holes in the center tube connector 29. Since the sphere 56 of the embodiment of Fig. 14 has a large diameter, about 1.5 cm of the lower section of the upper tube 21-24 is fitted into the hole in the center tube connector 29. Further, about 1.5 cm of the leg tube 57-59 can be inserted into the hole of the sphere 56. Additional support of the upper tube 21-24 and the leg tubes 57-59 provided by the longer insertion length into the central tube connector 29 provides additional stability to the foldable chair 20 of FIG.

15 is a flowchart showing steps 60-65 of the method of manufacturing the folding chair 20. Fig. In a first step 60, a detachable section of the upper tube 21-24 is formed from a hollow aluminum tube. Each section has a lower portion having a smaller outer diameter. The lower portion of the upper section of tubes 23-24 has a size that fits snugly into the top of the middle section of tubes 23-24. Likewise, the lower portion of the middle section of tubes 23-24 has a size that fits snugly on top of the lower section of tubes 23-24. The lower portion of the upper section of the tube 21-22 has a size that fits snugly in the upper portion of the lower section of the tube 21-22. The upper tube 23-24 is formed when the upper section is detachably connected to the middle section, and the middle section is detachably connected to the lower section. The upper tube 21-22 is formed when the upper section is detachably connected to the lower section. The upper tube 21-24 has a lower end facing the upper sheet end. The upper tube 21-24 is then coupled such that the reinforcement tube 70 having an outer diameter smaller than the remainder of the upper tube is fully inserted into the lower portion of the upper tube so as to more firmly support the folding chair .

16 is a view showing a folding chair provided with a floor support portion. 16, the floor supporting part 80 can be detachably coupled to the lower end of the folding chair. The floor supporting part 80 includes a bottom plate 81, A plurality of insertion pockets 81 having a number corresponding to the number of the leg tubes are formed and the lower ends of the leg tubes are inserted in the insertion pockets 81 to firmly support the folding chairs, Allows the chair to maintain its horizontal posture without turning it down.

In step 61, the leg tubes 25-28 are also formed of hollow aluminum tubes. Each leg tube has only one section. The leg tubes 25-28 have an upper end and a lower ground end. The leg tubes 25-28 are configured such that the reinforcing tube 70 having an outer diameter smaller than the remainder of the leg tube is fully inserted into the upper portion of the leg tube so as to more firmly support the folding chair .

In step 62, an upper hole 46a and a lower hole 46b are formed in the center tube connector 29. [ The upper hole 46a is angled upward, and the lower hole 46b is angled downward. The lower end of the upper tube 21-24 has a size that fits snugly in the upper hole 46a and the upper end of the leg tube 25-28 has a size that fits snugly in the lower hole 46b. The center tube connector 29 has an upper body 31 that rotates on the lower body 32 and the upper hole 46a is disposed on the upper body 31 and the lower hole 46b And is disposed in the lower body 32.

In step 63, the seatback 30 is made of four tube receptacles arranged at the corners of the substantially backwardly-facing seatback so as to fit over the seat ends of the upper tubes 21-24. The seat back 30 is made by sewing together several pieces of fabric and plastic together and gluing or stitching the tube receptacle to fabric or plastic.

In step 64, the elastic cord is pulled through one tube into the hole, out of the other hole, and into another tube. The elastic cord connected to the end plug of the upper tube 23 is pulled into the hole 46 through the section of the tube 23 and out of the other hole and through the section of the upper tube 24, 24). Similarly, another resilient cord connected to the grounding plug 40 of the leg tube 25 pulls the leg tube 25 into one hole in the lower body 32, exits the other hole, and passes through the leg tube 26 to the tube 26 are connected to a grounding plug 41.

In step 65, all the tube sections are separated from each other and the tubes are separated from the center tube connector 29, as shown in Fig. The tubes are oriented parallel relative to each other, and the upper tubes 21-24, the leg tubes 25-28, the center tube connector 29, and the seat back 30 are put into a storage bag. At this time, the seat back 30 has a length shorter than 30 cm or 30 cm, so that the contents of the storage can be compactly accommodated.

Further, the seat back 30 can be folded and rolled before being put into the storage bag. Because all tube sections and leg tubes are smaller than 12 inches in length, the components of the foldable chair 20 can be housed in small storage bags having a length of 30 cm or less, which is ideal for camping and hiking. And the storage bag is about 4 inches in diameter.

Although certain specific embodiments have been described above to illustrate the invention, the invention is not limited to any particular embodiment. Accordingly, various modifications, adaptations, and combinations of the various features of the described embodiments may be made without departing from the scope of the invention as set forth in the claims.

20. The collapsible chair
21-24. The upper tube
25-28. Leg tube
29. Central tube connector
30. Seat back
31. Upper portion
32. Lower portion,
33-36. Tube receptacle
37,39. Elastic cord
38. End plug
40. Grounding plug
41. Ground plug
42. Bolt
43. Lower section
44. Middle section
45. Upper section
46a. Upper hole
46b. Bottom hole
49a. Cylinder body
49b. The first threaded portion
49c. The second threaded portion
52. Lock washer
70. Reinforcing tube
80. Floor support
81. Floor plate
82. Insert pocket

Claims (24)

A plurality of upper tubes having a lower end and a seat end; A plurality of leg tubes having an upper end; A seat back having a plurality of tube receptacles; And a center tube connector having a plurality of upper holes and a plurality of lower holes,
The lower end of the upper tube is detachably connected to the center tube connector by being inserted into the upper hole and the upper end of the leg tube is inserted into the lower hole to be detachably attached to the center tube connector A seat end of the upper tube is detachably connected to the tube receptacle,
Wherein the center tube connector has an upper body rotating on a lower body, a cylinder passing through a center of the upper body and the lower body is coupled, the upper hole is disposed on the upper body, Lt; / RTI >
Wherein the cylinder comprises: a cylinder body connected through the center of the upper body and the lower body; A first screw portion connected to an upper side of the cylinder body and having a screw thread formed on an outer periphery thereof and screwed to an upper portion of the upper body; And a second screw portion connected to a lower side of the cylinder body and having a screw thread formed on an inner periphery thereof and bolted to a lower portion of the lower body.
The method according to claim 1,
Each of said upper tubes comprising detachable sections.
The method according to claim 1,
Wherein a lower end of each of the upper tubes has a dimension sized to fit snugly into the corresponding upper hole.
The method according to claim 1,
The plurality of upper tubes are composed of four tubes,
And the seat end is coupled to the inside of the tube receptacle at four corners of the seat back.
The method according to claim 1,
Wherein said seat back is made of fabric.
delete delete The method according to claim 1,
A ring-shaped thrust bush is provided on the lower surface of the upper body,
A radial bushing (53a) fitted to surround the outer periphery of the cylinder body is provided on the lower side of the upper body,
And another radial bush 53b fitted to surround the outer periphery of the second screw portion,
Wherein a lock washer is provided on an outer periphery of the bolt.
The method according to claim 1,
Wherein the upper tube rotates about the cylinder.
The method according to claim 1,
The center tube connector is a sphere-shaped folding chair.
The method according to claim 1,
Wherein the plurality of upper tubes comprises two tubes of a first length and two tubes of a second length, the first length being longer than the second length.
The method according to claim 1,
Further comprising an elastic cord passing through one of the upper holes and into one of the upper tubes.
The method according to claim 1,
Wherein the upper tube has a reinforcing tube inserted into the lower inner side,
Wherein the leg tube has a reinforcing tube inserted and coupled inside the upper portion thereof.
delete delete delete delete delete The method according to claim 1,
And a bottom support having a bottom plate and a plurality of insertion pockets having a number corresponding to the number of the leg tubes at an edge of the bottom plate and having a lower end of the leg tube inserted therein.


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