CN220275239U - Folding chair with small volume - Google Patents

Abstract

The utility model relates to the technical field of folding furniture, and discloses a folding chair with smaller volume, which comprises: the device comprises a first U-shaped pipe, a second U-shaped pipe, a third U-shaped pipe, a fourth U-shaped pipe, a first limiting component, a second limiting component, a third limiting component and a locking component; the first U-shaped pipe is hinged with the second U-shaped pipe, the second U-shaped pipe is hinged with the third U-shaped pipe, and the third U-shaped pipe is hinged with the fourth U-shaped pipe; the first limiting component is used for limiting the relative rotation angle of the first U-shaped pipe and the second U-shaped pipe, the second limiting component is used for limiting the relative rotation angle of the second U-shaped pipe and the third U-shaped pipe in a hinged manner, and the third limiting component is used for limiting the relative rotation angle of the third U-shaped pipe and the fourth U-shaped pipe; the locking component is used for locking the third U-shaped pipe at a position which forms a specific included angle with the second U-shaped pipe after rotating. The utility model occupies small volume of the storage space and saves the storage space.

Description

Folding chair with small volume

Technical Field

The utility model relates to the technical field of folding furniture, in particular to a folding chair with a small volume.

Background

More and more people use folding furniture in a space-saving way, the folding chairs and the folding tables are common folding furniture, the volume is small, a large amount of storage space can be saved when the folding furniture is folded, the space can be effectively utilized, and the folding furniture is practical for small-sized furniture and space with small part area; and the portable electric power generation device is convenient to carry, and can be applied to outdoor activities, education and training, places needing to provide short rest and the like.

CN202077909U discloses a folding chair, its structure includes the back of the chair, seat, fold paper, movable landing leg and fixed landing leg, the back of the chair be "U" shape of falling, the back of the chair lower part links as an organic wholely with the fixed landing leg, seat and movable landing leg's one end pass through fold paper and the activity hinge joint of back of the chair. The sitting surface, the movable supporting legs and the chair back are in streamline shape after being folded. The folding chair has the advantages of simple structure, convenient and comfortable use and saving storage space. However, the lower part of the chair back and the fixed support leg are connected into a whole, and cannot be folded, so that more space is occupied when the chair back is not used, and improvement is needed.

Disclosure of Invention

The utility model solves the technical problems of the prior art by providing a folding chair with smaller volume, which solves the problems that the lower part of the chair back and the fixed support leg are connected into a whole, have higher height and cannot be folded, so that more space is occupied when the chair is not used.

In order to solve the technical problems, the utility model adopts the following technical scheme:

a folding chair having a reduced volume, comprising: the device comprises a first U-shaped pipe, a second U-shaped pipe, a third U-shaped pipe, a fourth U-shaped pipe, a first limiting component, a second limiting component, a third limiting component and a locking component; the first U-shaped pipe is hinged with the second U-shaped pipe, the second U-shaped pipe is hinged with the third U-shaped pipe, and the third U-shaped pipe is hinged with the fourth U-shaped pipe; the first limiting component is used for limiting the relative rotation angle of the first U-shaped pipe and the second U-shaped pipe, the second limiting component is used for limiting the relative rotation angle of the second U-shaped pipe and the third U-shaped pipe in a hinged mode, and the third limiting component is used for limiting the relative rotation angle of the third U-shaped pipe and the fourth U-shaped pipe; the locking component is used for locking the third U-shaped pipe at a position which forms a specific included angle with the second U-shaped pipe after rotating.

When the second U-shaped pipe rotates clockwise to a specific angle of the first limiting component, the first U-shaped pipe and the second U-shaped pipe are matched with the ground to form a triangular structure to be used as a support of the folding chair; then clockwise rotates the third U-shaped tube to a specific angle of the second limiting assembly, and clockwise rotates the fourth U-shaped tube to a specific angle of the third limiting assembly; and finally, locking the third U-shaped pipe at a position which forms a specific included angle with the second U-shaped pipe after rotating through a locking assembly, thereby locking the positions of the first U-shaped pipe, the second U-shaped pipe, the third U-shaped pipe and the fourth U-shaped pipe. The fourth U-shaped tube is rotated anticlockwise to the position of the same plane of the third U-shaped tube, the locking device releases the third U-shaped tube at the moment, the fourth U-shaped tube and the third U-shaped tube are simultaneously rotated anticlockwise to the position of the same plane of the second U-shaped tube, and finally the fourth U-shaped tube, the third U-shaped tube and the second U-shaped tube are simultaneously rotated anticlockwise to the position of the same plane of the first U-shaped tube, so that the folding chair is stored. So set up, fold the coplanar through first U type pipe, second U type pipe, third U type pipe and fourth U type pipe, it is small to occupy the storage area, saves accommodation space, convenient operation to the chair back lower part and the fixed leg that proposes among the above-mentioned background art are even as an organic wholely, can't fold, lead to occupation space more problem when not using.

Further, the first limiting assembly comprises a first limiting groove provided with the first U-shaped pipe and a first limiting column arranged on the second U-shaped pipe, and the first limiting column is movably inserted into the first limiting groove.

Further, the second limiting assembly comprises a second limiting groove provided with the second U-shaped pipe and a second limiting column arranged on the third U-shaped pipe, and the second limiting column is movably inserted into the second limiting groove.

Further, the third limiting assembly comprises a third limiting groove provided with the third U-shaped pipe and a third limiting column arranged on the fourth U-shaped pipe, and the third limiting column is movably inserted into the third limiting groove.

Still further, the first limiting assembly further comprises a fourth limiting column provided with the first U-shaped pipe and a fourth limiting groove provided with the second U-shaped pipe, and the fourth limiting column is movably inserted into the fourth limiting groove; the second limiting assembly comprises a fifth limiting column provided with the second U-shaped pipe and a fifth limiting groove provided with the third U-shaped pipe, and the fifth limiting column is movably inserted into the fifth limiting groove; the third limiting assembly comprises a sixth limiting column provided with the third U-shaped pipe and a sixth limiting groove provided with the fourth U-shaped pipe, and the fifth limiting column is movably inserted into the fifth limiting groove; the fourth limiting column is arranged at the opposite position of the first limiting groove, the fifth limiting column is arranged at the opposite position of the second limiting groove, and the sixth limiting column is arranged at the opposite position of the third limiting groove.

Further, the locking assembly comprises a positioning hole formed in the third U-shaped pipe, an elastic positioning nail movably penetrating through the positioning hole, a landslide formed in the fourth U-shaped pipe and a limiting hole formed in the third U-shaped pipe; one end of the slope, which is high, is connected with the third limit column; when the locating nail slides from one end with low landslide to the third limit post, the third limit post extrudes the locating nail, the locating nail passes through the locating hole and is matched with the limit hole in an inserting way so as to lock the third U-shaped pipe at a position forming a specific included angle with the second U-shaped pipe after rotating.

Further, after the first U-shaped pipe, the second U-shaped pipe, the third U-shaped pipe and the fourth U-shaped pipe are folded, the first U-shaped pipe, the second U-shaped pipe, the third U-shaped pipe and the fourth U-shaped pipe are sequentially arranged on the same plane.

Furthermore, the first U-shaped pipe, the second U-shaped pipe, the third U-shaped pipe and the fourth U-shaped pipe are all made of metal materials.

Preferably, the third U-shaped pipe sleeve is provided with a cushion, the fourth U-shaped pipe sleeve is provided with a cushion, and two ends of the fourth U-shaped pipe sleeve are connected with connecting rods.

Preferably, the fourth U-shaped pipe sleeve is provided with a first panel, and one side of the first panel is hinged with one side of the second panel through a hinge shaft.

Compared with the prior art, the utility model has the beneficial effects that:

1. the first U-shaped pipe, the second U-shaped pipe, the third U-shaped pipe and the fourth U-shaped pipe are folded to the same plane, so that the storage space is saved, the operation is convenient, the packaging is more convenient in the transportation process, the whole structure is simple, and the appearance is concise;

2. through all setting up first U type pipe, second U type pipe, third U type pipe and fourth U type pipe to the metal material, the bearing nature is better, and life is longer.

Drawings

FIG. 1 is a schematic view showing a structure of a folding chair having a small volume according to a first embodiment of the present utility model when unfolded;

FIG. 2 is a schematic diagram of the junction of the first, second, third and fourth U-tubes in FIG. 1;

FIG. 3 is a schematic view of the junction of the first, second, third and fourth U-tubes in FIG. 1;

FIG. 4 is a schematic view of the structure of FIG. 3 from another perspective;

FIG. 5 is a schematic view of the first embodiment of the present utility model when folded;

FIG. 6 is a schematic view of the second embodiment of the present utility model when deployed;

fig. 7 is a schematic view of the structure of the second embodiment of the present utility model when folded.

Reference numerals: 10. a first U-shaped tube; 20. a second U-shaped tube; 30. a third U-shaped tube; 31. a back cushion; 40. a fourth U-shaped tube; 41. a cushion; 42. a connecting rod; 43. a first panel; 44. a second panel; 45. a hinge shaft; 50. a first limit assembly; 51. a first limit groove; 52. a first limit post; 53. a fourth limit column; 54. a fourth limit groove; 60. the second limiting component; 61. the second limit groove; 62. the second limit column; 63. a fifth limit column; 64. a fifth limit groove; 70. the third limiting assembly; 71. a third limit groove; 72. the third limit column; 73. a sixth limiting column; 74. a sixth limit groove; 80. a locking assembly; 81. positioning holes; 82. positioning nails; 83. landslide; 84. and a limiting hole.

Detailed Description

The utility model is described in further detail below with reference to the accompanying drawings.

The embodiments described by referring to the drawings are exemplary and intended for purposes of illustrating the present application and are not to be construed as limiting the present application. In the description of the present application, it should be understood that the terms "center," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," etc. indicate or are based on the orientation or positional relationship shown in the drawings, merely for convenience of description and to simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present application. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In this application, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, and may also include the first and second features not being in direct contact but being in contact with each other by way of additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is less level than the second feature.

First embodiment

As shown in fig. 1 to 5, a folding chair with a small volume according to a first embodiment of the present utility model comprises: the first U-shaped pipe 10, the second U-shaped pipe 20, the third U-shaped pipe 30, the fourth U-shaped pipe 40, the first limiting assembly 50, the second limiting assembly 60, the third limiting assembly 70 and the locking assembly 80; the first U-shaped pipe 10 is hinged with the second U-shaped pipe 20, the second U-shaped pipe 20 is hinged with the third U-shaped pipe 30, and the third U-shaped pipe 30 is hinged with the fourth U-shaped pipe 40; the first limiting assembly 50 is used for limiting the relative rotation angle of the first U-shaped pipe 10 and the second U-shaped pipe 20, the second limiting assembly 60 is used for limiting the relative rotation angle of the second U-shaped pipe 20 and the third U-shaped pipe 30 in a hinged manner, and the third limiting assembly 70 is used for limiting the relative rotation angle of the third U-shaped pipe 30 and the fourth U-shaped pipe 40; the locking assembly 80 is used to lock the third U-tube 30 in a position that forms a specific angle with the second U-tube 20 after rotation. The first U-shaped tube 10, the second U-shaped tube 20, the third U-shaped tube 30 and the fourth U-shaped tube 40 are sequentially arranged on the same plane after being folded.

The first U-shaped tube 10, the second U-shaped tube 20, the third U-shaped tube 30 and the fourth U-shaped tube 40 are respectively a front leg (which is not marked in the drawings because it is a prior part belonging to the prior art), a rear leg (same upper), a backrest (same upper) and a seat (same upper) of the folding chair; the first limiting assembly 50 is provided with two groups, which are respectively positioned at two junctions of two ends of the first U-shaped pipe 10 and the second U-shaped pipe 20; the second limiting assembly 60 is provided with two groups, which are respectively positioned at two junctions of two ends of the second U-shaped pipe 20 and the third U-shaped pipe 30; the third limiting assembly 70 is provided with two groups, which are respectively positioned at two junctions of two ends of the third U-shaped pipe 30 and the fourth U-shaped pipe 40; the locking assembly 80 is also provided with two sets of two junctions at the ends of the third and fourth U-tubes 30, 40, respectively.

When the folding chair needs to be unfolded, the second U-shaped pipe 20 is rotated clockwise to a specific angle of the first limiting component 50, and at the moment, the first U-shaped pipe 10 and the second U-shaped pipe 20 are matched with the ground to form a triangular structure to be used as a support of the folding chair; the third U-shaped pipe 30 is rotated clockwise to an angle vertical to the ground, and the fourth U-shaped pipe 40 is rotated clockwise to a position horizontal to the ground; finally, the third U-tube 30 is locked by the locking assembly 80, thereby locking the positions of the first U-tube 10, the second U-tube 20, the third U-tube 30 and the fourth U-tube 40. When the folding chair needs to be folded, the fourth U-shaped pipe 40 is rotated anticlockwise to the position of the same plane of the third U-shaped pipe 30, the locking device releases the third U-shaped pipe 30 at the moment, the fourth U-shaped pipe 40 and the third U-shaped pipe 30 are rotated anticlockwise to the position of the same plane of the second U-shaped pipe 20 at the same time, and finally the fourth U-shaped pipe 40, the third U-shaped pipe 30 and the second U-shaped pipe 20 are rotated anticlockwise to the position of the same plane of the first U-shaped pipe 10 at the same time, so that the folding chair is stored. So set up, fold the coplanar through with first U type pipe 10, second U type pipe 20, third U type pipe 30 and fourth U type pipe 40, take up an area of small, save accommodation space, convenient operation packs more conveniently in the transportation, and whole simple structure, the outward appearance is succinct.

As shown in fig. 1 to 5, the first limiting assembly 50 includes a first limiting groove 51 provided with the first U-shaped tube 10 and a first limiting post 52 provided with the second U-shaped tube 20, and the first limiting post 52 is movably inserted into the first limiting groove 51; in practice, when the second U-shaped tube 20 rotates clockwise, the first limiting post 52 moves in the first limiting groove 51, and the first limiting groove 51 limits the first limiting post 52, so as to limit the relative rotation angle of the first U-shaped tube 10 and the second U-shaped tube 20.

As shown in fig. 1 to 5, the second limiting assembly 60 includes a second limiting groove 61 provided with the second U-shaped tube 20 and a second limiting post 62 provided with the third U-shaped tube 30, and the second limiting post 62 is movably inserted into the second limiting groove 61; in practice, when the third U-shaped tube 30 rotates clockwise, the second limiting post 62 moves in the second limiting groove 61, and the second limiting groove 61 limits the second limiting post 62, thereby limiting the relative rotation angle of the second U-shaped tube 20 and the third U-shaped tube 30.

As shown in fig. 1 to 5, the third limiting assembly 70 includes a third limiting groove 71 provided with the third U-shaped tube 30 and a third limiting post 72 provided with the fourth U-shaped tube 40, and the third limiting post 72 is movably inserted into the third limiting groove 71; in practice, when the fourth U-shaped tube 40 rotates clockwise, the third limiting post 72 moves in the third limiting groove 71, and the third limiting groove 71 limits the third limiting post 72, thereby limiting the relative rotation angle of the third U-shaped tube 30 and the fourth U-shaped tube 40.

As shown in fig. 1 to 5, the first limiting assembly 50 further includes a fourth limiting post 53 provided with the first U-shaped tube 10 and a fourth limiting groove 54 provided with the second U-shaped tube 20, and the fourth limiting post 53 is movably inserted into the fourth limiting groove 54; the second limiting assembly 60 includes a fifth limiting post 63 provided with the second U-shaped tube 20 and a fifth limiting groove 64 provided with the third U-shaped tube 30, and the fifth limiting post 63 is movably inserted into the fifth limiting groove 64; the third limiting assembly 70 includes a sixth limiting post 73 provided with the third U-shaped tube 30 and a sixth limiting groove 74 provided with the fourth U-shaped tube 40, and the fifth limiting post 63 is movably inserted into the fifth limiting groove 64; the fourth limiting post 53 is disposed opposite to the first limiting groove 51, the fifth limiting post 63 is disposed opposite to the second limiting groove 61, and the sixth limiting post 73 is disposed opposite to the third limiting groove 71. So set up, after folding chair is expanded, it is more firm.

As shown in fig. 1 to 5, the locking assembly 80 includes a positioning hole 81 provided in the third U-shaped tube 30, a positioning pin 82 with elasticity movably penetrating through the positioning hole 81, and a limiting hole 84 provided in the third U-shaped tube 30; one end of the landslide 83, which is higher, is connected with the third limit post 72; when the positioning pin 82 slides from the lower end of the sliding slope 83 to the third limiting post 72, the third limiting post 72 extrudes the positioning pin 82, and the positioning pin 82 passes through the positioning hole 81 to be in plug-in fit with the limiting hole 84 so as to lock the third U-shaped tube 30 at a position forming a specific included angle with the second U-shaped tube 20 after rotating. In the implementation, when the position of the third U-shaped tube 30 needs to be locked, the third U-shaped tube 30 is rotated clockwise to an angle vertical to the ground, and then the fourth U-shaped tube 40 is rotated clockwise to an angle horizontal to the ground, at this time, the positioning nail 82 slides from the bottommost end of the landslide 83 to the highest end position and is in butt joint with the third limiting post 72, the third limiting post 72 extrudes the positioning nail 82, and the positioning nail 82 with elasticity is extruded and then is inserted and matched with the limiting hole 84 through the positioning hole 81 so as to lock the third U-shaped tube 30; when the third U-shaped tube 30 needs to be released, the fourth U-shaped tube 40 is rotated counterclockwise to the position on the same plane as the third U-shaped tube 30, at this time, the positioning nail 82 slides from the position of the third limiting post 72 to the bottommost end of the sliding block, at this time, the positioning nail 82 returns to the original position, and thus the third U-shaped tube 30 is released.

As shown in fig. 1 to 5, the first U-shaped tube 10, the second U-shaped tube 20, the third U-shaped tube 30 and the fourth U-shaped tube 40 are all made of metal materials; so set up, the bearing nature is better, and life is longer.

As shown in fig. 1 to 5, a cushion 31 is sleeved on the third U-shaped tube 30, a cushion 41 is sleeved on the fourth U-shaped tube 40, and connecting rods 42 are connected to two ends of the fourth U-shaped tube; the folding chair is more comfortable due to the arrangement.

The unfolding process of the folding chair is as follows: the second U-shaped tube 20 rotates clockwise to a specific angle, at this time, the first limiting post 52 moves in the first limiting groove 51, the first limiting groove 51 limits the first limiting post 52, the fourth limiting post 53 moves in the fourth limiting groove 54, and the fourth limiting groove 54 limits the fourth limiting post 53, so as to limit the relative rotation angle of the first U-shaped tube 10 and the second U-shaped tube 20; at this time, the first U-shaped tube 10 and the second U-shaped tube 20 are matched with the ground to form a triangle structure as a support of the folding chair; the third U-shaped pipe 30 is rotated clockwise to an angle vertical to the ground, at the moment, the second limiting column 62 moves in the second limiting groove 61, the second limiting groove 61 limits the second limiting column 62, the fifth limiting column 63 moves in the fifth limiting groove 64, and the fifth limiting groove 64 limits the fifth limiting column 63, so that the relative rotation angle of the second U-shaped pipe 20 and the third U-shaped pipe 30 is limited; the fourth U-shaped pipe 40 is rotated clockwise to an angle horizontal to the ground, at the moment, the third limiting post 72 moves in the third limiting groove 71, the third limiting groove 71 limits the third limiting post 72, the sixth limiting post 73 moves in the sixth limiting groove 74, and the sixth limiting groove 74 limits the sixth limiting post 73, so that the relative rotation angle of the third U-shaped pipe 30 and the fourth U-shaped pipe 40 is limited; at this time, the positioning pin 82 slides from the bottommost end of the sliding slope 83 to the highest end position, and is in butt joint with the third limiting column 72, the third limiting column 72 extrudes the positioning pin 82, and the positioning pin 82 with elasticity passes through the positioning hole 81 to be in plug-in fit with the limiting hole 84 after extrusion so as to lock the third U-shaped tube 30, thereby locking the positions of the first U-shaped tube 10, the second U-shaped tube 20, the third U-shaped tube 30 and the fourth U-shaped tube 40.

The folding process of the folding chair is as follows: the fourth U-shaped tube 40 is rotated anticlockwise to the position of the same plane as the third U-shaped tube 30, at the moment, the third limiting column 72 and the sixth limiting column 73 return to the original positions, the positioning nail 82 slides to the bottommost end of the sliding block from the position of the third limiting column 72, and at the moment, the positioning nail 82 returns to the original positions, so that the third U-shaped tube 30 is released; and then the fourth U-shaped pipe 40 and the third U-shaped pipe 30 are simultaneously rotated anticlockwise to the same plane position of the second U-shaped pipe 20, at this time, the second limit post 62 and the fifth limit post 63 return to the original positions, and finally the fourth U-shaped pipe 40, the third U-shaped pipe 30 and the second U-shaped pipe 20 are simultaneously rotated anticlockwise to the same plane position of the first U-shaped pipe 10, and the first limit post 52 and the fourth limit post 53 return to the original positions, so that the folding chair is stored.

Second embodiment

As shown in fig. 6 and 7, which are second embodiments of the present utility model, the difference from the first embodiment is that the first U-shaped tube 10 and the second U-shaped tube 20 are a front leg (which is not labeled in the drawings because it is a conventional part) and a rear leg (as above) of the folding table, respectively; the third U-shaped tube 30 can be rotated to an angle parallel to the ground, the fourth U-shaped tube 40 is sleeved with a first panel 43, and one side of the first panel 43 is hinged with one side of a second panel 44 through a hinge shaft 45.

The unfolding process of the folding table is as follows: the second U-shaped tube 20 rotates clockwise to a specific angle, at this time, the first limiting post 52 moves in the first limiting groove 51, the first limiting groove 51 limits the first limiting post 52, the fourth limiting post 53 moves in the fourth limiting groove 54, and the fourth limiting groove 54 limits the fourth limiting post 53, so as to limit the relative rotation angle of the first U-shaped tube 10 and the second U-shaped tube 20; at this time, the first U-shaped tube 10 and the second U-shaped tube 20 are matched with the ground to form a triangle structure to be used as a support of the folding table; the third U-shaped pipe 30 is rotated clockwise to an angle horizontal to the ground, at the moment, the second limiting column 62 moves in the second limiting groove 61, the second limiting groove 61 limits the second limiting column 62, the fifth limiting column 63 moves in the fifth limiting groove 64, and the fifth limiting groove 64 limits the fifth limiting column 63, so that the relative rotation angle of the second U-shaped pipe 20 and the third U-shaped pipe 30 is limited; the fourth U-shaped pipe 40 is rotated clockwise to an angle horizontal to the ground, at the moment, the third limiting post 72 moves in the third limiting groove 71, the third limiting groove 71 limits the third limiting post 72, the sixth limiting post 73 moves in the sixth limiting groove 74, and the sixth limiting groove 74 limits the sixth limiting post 73, so that the relative rotation angle of the third U-shaped pipe 30 and the fourth U-shaped pipe 40 is limited; meanwhile, the positioning nail 82 slides from the bottommost end of the landslide 83 to the highest end position and is in butt joint with the third limiting column 72, the third limiting column 72 extrudes the positioning nail 82, and the positioning nail 82 with elasticity passes through the positioning hole 81 to be matched with the limiting hole 84 in an inserting way after extrusion so as to lock the third U-shaped tube 30, and then the positions of the first U-shaped tube 10, the second U-shaped tube 20, the third U-shaped tube 30 and the fourth U-shaped tube 40 are locked; the second panel 44 is turned counterclockwise to be level with the ground, at this time, the second panel 44 just falls into the third U-shaped tube, and finally the second panel 44 is fixed by the hinge shaft 45.

The folding process of the folding table is as follows: the second panel 44 is turned clockwise to be overlapped with the first panel 43, the fourth U-shaped tube 40 is rotated anticlockwise to the position of the same plane of the third U-shaped tube 30, at the moment, the third limiting column 72 and the sixth limiting column 73 return to the original positions, the positioning nail 82 slides to the bottommost end of the sliding block from the position of the third limiting column 72, and at the moment, the positioning nail 82 returns to the original positions, so that the third U-shaped tube 30 is released; and then the fourth U-shaped pipe 40 and the third U-shaped pipe 30 are simultaneously rotated anticlockwise to the same plane position of the second U-shaped pipe 20, at this time, the second limit post 62 and the fifth limit post 63 return to the original positions, and finally the fourth U-shaped pipe 40, the third U-shaped pipe 30 and the second U-shaped pipe 20 are simultaneously rotated anticlockwise to the same plane position of the first U-shaped pipe 10, and the first limit post 52 and the fourth limit post 53 return to the original positions, so that the folding table is stored.

The above description should not be taken as limiting the scope of the utility model, and any modifications, equivalent changes and modifications made to the above embodiments according to the technical principles of the present utility model still fall within the scope of the technical solutions of the present utility model.

Claims (10)

1. A folding chair having a small volume, comprising: the device comprises a first U-shaped pipe (10), a second U-shaped pipe (20), a third U-shaped pipe (30), a fourth U-shaped pipe (40), a first limiting component (50), a second limiting component (60), a third limiting component (70) and a locking component (80); the first U-shaped pipe (10) is hinged with the second U-shaped pipe (20), the second U-shaped pipe (20) is hinged with the third U-shaped pipe (30), and the third U-shaped pipe (30) is hinged with the fourth U-shaped pipe (40); the first limiting assembly (50) is used for limiting the relative rotation angle of the first U-shaped pipe (10) and the second U-shaped pipe (20), the second limiting assembly (60) is used for limiting the relative rotation angle of the second U-shaped pipe (20) and the third U-shaped pipe (30) in a hinged manner, and the third limiting assembly (70) is used for limiting the relative rotation angle of the third U-shaped pipe (30) and the fourth U-shaped pipe (40); the locking assembly (80) is used for locking the third U-shaped pipe (30) at a position forming a specific included angle with the second U-shaped pipe (20) after rotation.

2. The folding chair with reduced volume according to claim 1, wherein: the first limiting assembly (50) comprises a first limiting groove (51) provided with the first U-shaped tube (10) and a first limiting column (52) arranged on the second U-shaped tube (20), and the first limiting column (52) is movably inserted into the first limiting groove (51).

3. The folding chair with reduced volume according to claim 2, wherein: the second limiting assembly (60) comprises a second limiting groove (61) provided with the second U-shaped tube (20) and a second limiting column (62) arranged on the third U-shaped tube (30), and the second limiting column (62) is movably inserted into the second limiting groove (61).

4. A folding chair with reduced volume according to claim 3, characterized in that: the third limiting assembly (70) comprises a third limiting groove (71) provided with the third U-shaped tube (30) and a third limiting column (72) arranged on the fourth U-shaped tube (40), and the third limiting column (72) is movably inserted into the third limiting groove (71).

5. The folding chair with reduced volume according to claim 4, wherein: the first limiting assembly (50) further comprises a fourth limiting column (53) provided with the first U-shaped pipe (10) and a fourth limiting groove (54) formed in the second U-shaped pipe (20), and the fourth limiting column (53) is movably inserted into the fourth limiting groove (54); the second limiting assembly (60) comprises a fifth limiting column (63) provided with the second U-shaped pipe (20) and a fifth limiting groove (64) formed in the third U-shaped pipe (30), and the fifth limiting column (63) is movably inserted into the fifth limiting groove (64); the third limiting assembly (70) comprises a sixth limiting column (73) provided with the third U-shaped pipe (30) and a sixth limiting groove (74) provided with the fourth U-shaped pipe (40), and the fifth limiting column (63) is movably inserted into the fifth limiting groove (64); the fourth limiting column (53) and the first limiting groove (51) are arranged at opposite positions, the fifth limiting column (63) and the second limiting groove (61) are arranged at opposite positions, and the sixth limiting column (73) and the third limiting groove (71) are arranged at opposite positions.

6. The folding chair with reduced volume according to claim 5, wherein: the locking assembly (80) comprises a positioning hole (81) formed in the third U-shaped pipe (30), a positioning nail (82) with elasticity movably penetrating through the positioning hole (81), a landslide (83) formed in the fourth U-shaped pipe (40) and a limiting hole (84) formed in the third U-shaped pipe (30); one high end of the landslide (83) is connected with the third limit column (72); when the locating pin (82) slides from the low end of the landslide (83) to the third limiting column (72), the third limiting column (72) extrudes the locating pin (82), and the locating pin (82) passes through the locating hole (81) to be in plug-in fit with the limiting hole (84) so as to lock the third U-shaped tube (30) at a position forming a specific included angle with the second U-shaped tube (20) after rotating.

7. The folding chair with reduced volume according to claim 6, wherein: the first U-shaped pipe (10), the second U-shaped pipe (20), the third U-shaped pipe (30) and the fourth U-shaped pipe (40) are sequentially arranged on the same plane after being folded.

8. The folding chair with reduced volume according to claim 7, wherein: the first U-shaped pipe (10), the second U-shaped pipe (20), the third U-shaped pipe (30) and the fourth U-shaped pipe (40) are all made of metal materials.

9. The folding chair with reduced volume according to claim 8, wherein: the third U-shaped tube (30) is sleeved with a back cushion (31), the fourth U-shaped tube (40) is sleeved with a cushion (41), and two ends of the fourth U-shaped tube are connected with connecting rods (42).

10. The folding chair with reduced volume according to claim 8, wherein: the fourth U-shaped pipe (40) is sleeved with a first panel (43), and one side of the first panel (43) is hinged with one side of a second panel (44) through a hinge shaft (45).