CN219556735U - Rotary connecting piece, folding chair and moon chair - Google Patents

Abstract

The utility model discloses a rotary connecting piece, a folding chair and a moon chair, wherein the rotary connecting piece comprises a connecting piece main body, at least one side of the outer part of the connecting piece main body is provided with a boss, the connecting piece main body is provided with a slot which is longitudinally arranged and a hinge hole which is transversely arranged, the hinge hole is communicated with the slot, and the hinge hole penetrates through the connecting piece main body and the boss. According to the rotary connecting piece, the longitudinal slot and the transverse hinge hole are arranged, so that two or three pipe fittings can be connected through one hinge shaft, the production process is simplified, and the production cost is reduced; the volume of the rotary connecting piece is small, so that the volume of the folded chair frame is further reduced, and the packaging cost is reduced.

Description

Rotary connecting piece, folding chair and moon chair

Technical Field

The utility model relates to the field of folding chairs, in particular to a rotating connecting piece, a folding chair and a moon chair.

Background

The front foot and the rear foot are folded forward mostly when the existing moon chair is folded on the market, so that the folding size is relatively large, the front foot and the rear foot are folded reversely when the product disclosed in my patent CN214433077U is folded, and all the tubes are staggered with each other after being folded, so that the folding size of the product is relatively smaller, but the product has the following defects:

the front foot pipe is sleeved in the jack of the rotary connection, the upper end of the sliding supporting pipe is pivoted between the two side plates of the rotary connection piece, the upper end of the back supporting pipe is pivoted on the outer side of one side plate, at least two rotating shafts are required to be installed for realizing the connection of the front foot pipe, the sliding supporting pipe and the back supporting pipe at the connection point, the assembly process is complex, the cost is increased, the two rotating shafts transmit force through the rotary connection piece, the strength requirement on the rotary connection piece is high, in addition, the volume of the rotary connection piece is large, and the volume of the folded chair frame is still provided with a further improvement space.

Disclosure of Invention

Aiming at the defects of the prior art, the utility model provides the rotary connecting piece, so that the folding volume of the chair frame is smaller, the production process is simpler and more convenient, and the cost is reduced.

In order to achieve the above purpose, the utility model is realized by the following technical scheme:

the utility model provides a rotate connecting piece, includes the connecting piece main part, and connecting piece main part outside is equipped with the boss on at least one side, and the connecting piece main part has the slot of vertical setting and the hinge hole of horizontal setting, hinge hole and slot intercommunication, hinge hole penetration connecting piece main part and boss.

Further, the slot is a round hole slot, a flat hole slot or a square hole slot.

Further, one end of the slot is an open end, and the other end is a closed end.

Further, the middle part of one end of the boss far away from the connecting piece main body is concaved inwards to form a groove, and a flange is formed around the groove.

The utility model also provides a folding chair, which comprises a chair surface and a chair frame, wherein the chair frame comprises the rotating connecting piece.

In one embodiment, the folding chair is a moon chair, the chair frame comprises a seat ring pipe, a front foot pipe, a rear foot pipe, a back support pipe and a sliding support pipe, the upper end of the back support pipe is hinged to the rear part of the seat ring pipe, the front foot pipe is in X-shaped cross hinge with the rear foot pipe, the rotating connecting piece is sleeved at the upper end of the front foot pipe through a slot, the upper end of the front foot pipe, the lower end of the back support pipe, the upper end of the sliding support pipe and the rotating connecting piece are connected through a hinge shaft inserted in a hinge hole of the rotating connecting piece, bosses are arranged on two sides of the rotating connecting piece, the hinge hole penetrates through the two bosses, the lower end of the back support pipe and the upper end of the sliding support pipe are hinged to the bosses on two sides of the rotating connecting piece respectively, the lower end of the sliding support pipe is arranged on the rear foot pipe in a sliding mode through a sliding sleeve, a fixing sleeve used for limiting the movement range of the sliding support pipe is arranged on the rear foot pipe in a left-right mirror mode, and the structure of the chair frame is arranged.

Further, the upper ends of the back support pipe and the front foot pipe are hinged with the seat ring pipe through U-shaped pieces, the top of the U-shaped pieces is fixed with the seat ring pipe, and the upper ends of the back support pipe and the front foot pipe are hinged between the two side plates at the corresponding openings of the U-shaped pieces; the appearance of the sliding sleeve main body is U-shaped, the opening end of the sliding sleeve is hinged with the lower end of the sliding support tube, the closed end of the sliding sleeve is of a circular tube structure, and the closed end of the sliding sleeve is sleeved on the rear foot tube.

In one embodiment, the folding chair is a moon chair, the chair frame comprises a seat ring pipe, a front foot pipe, a rear foot pipe, a back support pipe and a sliding support pipe, the front foot pipe and the rear foot pipe are in X-shaped cross hinge, a rotating connecting piece is sleeved at the upper end of the front foot pipe through a slot, the upper end of the back support pipe is hinged with the rear part of the seat ring pipe, the lower end of the back support pipe, the upper end of the front foot pipe and the rotating connecting piece are connected through a hinge shaft inserted in a hinge hole of the rotating connecting piece, the rotating connecting piece is provided with a boss, the lower end of the back support pipe is hinged on the boss, the upper end of the rear foot pipe is hinged with the upper part of the sliding support pipe, the upper end of the sliding support pipe is hinged with the front part of the seat ring pipe, the lower end of the sliding support pipe is arranged on the front foot pipe in a sliding manner through a sliding sleeve, a fixed sleeve used for limiting the movement range of the sliding support pipe is arranged on the front foot pipe in a left-right mirror image mode.

Further, the upper end of the back support pipe and the upper end of the sliding support pipe are hinged with the seat ring pipe through U-shaped pieces, the top of each U-shaped piece is fixed with the seat ring pipe, and the upper end of the back support pipe and the upper end of the sliding support pipe are hinged between two side plates at the corresponding openings of the U-shaped pieces; the appearance of the sliding sleeve main body is U-shaped, the opening end of the sliding sleeve is hinged with the lower end of the sliding support tube, the closed end of the sliding sleeve is of a circular tube structure, and the closed end of the sliding sleeve is sleeved on the front foot tube.

In one embodiment, the front leg tube and the rear leg tube are U-shaped tubes with upward open ends, the back support tube and the sliding support tube are both provided with a left tube and a right tube, the rotating connecting piece is provided with a left tube and a right tube, and the front leg tube, the rear leg tube and the back support tube are mutually staggered and hinged so as to enable the front leg tube, the rear leg tube and the back support tube not to be overlapped after being folded.

The rotary connecting piece is provided with the longitudinal slot and the transverse hinge hole, so that two or three pipe fittings can be connected through one hinge shaft, the production process is simplified, and the production cost is reduced; the rotary connecting piece does not provide supporting force for each pipe fitting, and the force between the pipe fittings is transmitted only through the hinge shaft, so that the connection stability is better; in addition, the volume of the rotary connecting piece is small, so that the volume of the folded chair frame is further reduced, and the packaging cost is reduced.

In the unfolded state of the moon chair, the sliding support tube, the front foot tube and the rear foot tube form a stable triangle structure, which is beneficial to support; the sliding support tube, the front foot tube and the rear foot tube have stable structures, the pivot parts are not easy to break, and the phenomenon of forward turning or backward turning is not easy to occur when a person takes the seat; the moon chair is in a folded state, the back support tube, the front foot tube and the rear foot tube are mutually staggered, and each foot tube is completely arranged below the chair surface, so that the moon chair has small folding volume, small occupied space and more convenience in packaging, transportation and collection; the swivel connection itself does not provide support to the tubes and thus the connection between the tubes.

Drawings

FIG. 1 is a schematic view of the structure of a rotary joint according to the present utility model;

FIG. 2 is a schematic view showing a deployed state of a moon chair according to the first embodiment;

FIG. 3 is a schematic view of the semi-collapsed state of the lunar chair of FIG. 2;

FIG. 4 is a schematic view of the folding state of the moon chair of FIG. 2;

FIG. 5 is a schematic view showing a deployed state of a moon chair according to the second embodiment;

fig. 6 is a schematic view of the half-folded state of the moon chair of fig. 5.

Description of the reference numerals: 1. rotating the connecting piece; 2. a seat ring tube; 3. a front foot tube; 4. a rear foot tube; 5. a back support tube; 6. sliding the support tube; 7. a sliding sleeve; 8. a U-shaped member; 9. a fixed sleeve; 101. a connector body; 102. a boss; 103. a slot; 104. a hinge hole; 105. a groove; 106. and a flange.

Detailed Description

The utility model is further described below with reference to the drawings and examples.

In the description of the present utility model, it should be understood that the terms "upper," "lower," "front," "rear," "left," "right," "top," "bottom," "inner," "outer," and the like indicate or are based on the orientation or positional relationship shown in the drawings, merely to facilitate description of the present utility model 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 utility model.

Example 1

Referring to fig. 1, a rotary joint 1 for a folding chair comprises a joint body 101, wherein at least one side of the exterior of the joint body 101 is provided with a boss 102, the joint body 101 is provided with a slot 103 arranged longitudinally and a hinge hole 104 arranged transversely, the hinge hole 104 is communicated with the slot 103, and the hinge hole 104 penetrates through the joint body 101 and the boss 102.

When in use, the rotary connecting piece 1 is inserted on the pipe fitting of the chair frame through the slot 103, and the boss 102 of the rotary connecting piece 1 is hinged with other pipe fittings. The boss 102 is used for separating articulated pipe fitting and pipe fitting, avoids the pipe fitting to fall the lacquer or lead to the pipe fitting to rotate the problem of being obstructed because of pipe fitting warp after having many times to rotate in direct contact connection between the pipe fitting, still has the advantage that increase 1 wall thickness of rotation connecting piece avoids hinge hole 104 fracture to damage, and the quantity of boss 102 sets up according to the pipe fitting quantity that needs to connect, only needs a articulated shaft can realize the connection between two or three pipe fittings, has simplified folding chair's installation step, improves production efficiency. The shape of the slot 103 is set to match with the shape of the pipe, and the cross section of the common pipe is a round hole, a flat hole (including an elliptical hole), a square hole, so the slot 103 can be set to be a round hole slot, a flat hole slot, a square hole slot, etc., which is not limited thereto.

In order to accurately position the rotary connector 1 when being sleeved on the pipe fitting, the hinge hole 104 of the pipe fitting is aligned with the hinge hole 104 of the rotary connector 1 for assembly, one end of the slot 103 is an open end, the other end is a closed end, and the pipe fitting can be positioned by contacting the inner end of the slot 103. It will be appreciated by those skilled in the art that the shape of the slot 103 may be configured for positioning in other ways, for example, the slot 103 may be open at one end and have a limiting structure at the other end, and the limiting structure may be a protrusion provided on the inner wall of the slot 103, where the protrusion abuts against the end of the pipe to achieve positioning.

In order to enable the pipe fitting to rotate smoothly, the middle part of one end, far away from the connecting piece main body 101, of the boss 102 is concaved inwards to form a groove 105, a flange 106 is formed around the groove 105, and the flange 106 is in contact with the pipe fitting instead of the end face of the whole boss 102, so that the contact area between the boss 102 and the pipe fitting is reduced, friction is reduced, and smooth rotation of the pipe fitting is ensured.

The present embodiment also provides a folding chair employing the above-described rotary connector 1 for connection between pipe members. The type and shape of the folding chair is not limited, and any structure having the rotary joint 1 adapted thereto and employing the rotary joint 1 should be regarded as the folding chair described herein, such as a moon chair, beach chair.

The embodiment also introduces a moon chair, and the specific structure is as follows.

As shown in fig. 2 to 4, a moon chair comprises a seat and a frame, the frame comprising the above-mentioned swivel connection 1. The chair frame comprises a seat ring tube 2, a front foot tube 3, a rear foot tube 4, a back support tube 5 and a sliding support tube 6, wherein the upper end of the back support tube 5 is hinged to the rear part of the seat ring tube 2, the front foot tube 3 is in X-shaped cross hinge with the rear foot tube 4, a rotating connecting piece 1 is sleeved at the upper end of the front foot tube 3 through a slot 103, the upper end of the front foot tube 3, the lower end of the back support tube 5, the upper end of the sliding support tube 6 and the rotating connecting piece 1 are connected through a hinge shaft inserted in a hinge hole 104 of the rotating connecting piece 1, bosses 102 are arranged on two sides of the rotating connecting piece 1, the hinge hole 104 penetrates through the two bosses 102, the lower end of the back support tube 5 and the upper end of the sliding support tube 6 are hinged to the bosses 102 on two sides of the rotating connecting piece 1 respectively, the lower end of the sliding support tube 6 is arranged on the rear foot tube 4 in a sliding mode through a sliding sleeve 7, and a fixing sleeve 9 used for limiting the movement range of the sliding support tube 6 is arranged on the rear foot tube 4. In order to stabilize the structure and balance the stress, the structure of the chair frame is arranged in a left-right mirror image way. The hinge shaft may be of various types including, but not limited to, pins, bolts, rivets.

In a specific structure, the upper ends of the back support pipe 5 and the upper ends of the front foot pipes 3 are hinged with the seat ring pipe 2 through U-shaped pieces 8, the tops of the U-shaped pieces 8 are fixed with the seat ring pipe 2, and the upper ends of the back support pipe 5 and the upper ends of the front foot pipes 3 are hinged between two side plates at the corresponding openings of the U-shaped pieces 8. The appearance of the sliding sleeve 7 main body is U-shaped, the opening end of the sliding sleeve 7 is hinged with the lower end of the sliding support tube 6, the closed end of the sliding sleeve 7 is of a circular tube structure, the closed end of the sliding sleeve 7 is sleeved on the rear foot tube 4, and the sliding sleeve 7 slides on the rear foot tube 4 when the moon chair is folded or unfolded.

The front leg pipe 3 and the rear leg pipe 4 are U-shaped pipes with upward opening ends, which is beneficial to stabilizing the bottom structure of the moon chair and avoiding the deformation towards the middle. The back support tube 5 and the sliding support tube 6 are both provided with a left part and a right part, the rotary connecting piece 1 is provided with a left part and a right part, and the front foot tube 3, the rear foot tube 4 and the back support tube are mutually staggered and hinged and are not overlapped after being folded.

The hinge hole 104 of the rotary connecting piece 1 penetrates through the whole rotary connecting piece 1, the boss 102 is further arranged to further strengthen the strength of the hinge hole 104, the stress damage of the rotary connecting piece 1 is avoided, the lower end of the back support pipe 5 and the upper end of the front foot pipe 3 are connected to the rotary connecting piece 1 through the same hinge shaft, the hinge shaft for supporting the back support pipe 5 directly penetrates through the front foot pipe 3 and the sliding support pipe 6, the hinge shaft obtains direct support from the front foot pipe 3 and the sliding support pipe 6, therefore, the back support pipe 5 can obtain more powerful and stable supporting force, the lower end of the back support pipe 5 is limited by the upper end of the front foot pipe 3 and the upper end of the sliding support pipe 6 and is not easy to draw close towards the middle of the chair frame, the back support pipe 5 is stable in structure, and the U-shaped back support pipe 5 in the prior art is replaced by two back support pipes 5, so that the cost can be saved. The joint of the front foot pipe 3, the sliding support pipe 6 and the back support pipe 5 has firm structure and convenient assembly, and can realize the connection of three pipe fittings only by installing one hinge shaft.

The sliding support tube 6, the front foot tube 3 and the rear foot tube 4 form a stable triangular bracket, which is favorable for supporting the back support tube 5, and when the sliding support tube 6, the front foot tube 3 and the rear foot tube 4 are unfolded, the structure is stable, the hinge parts are not easy to break, and the phenomenon of forward turning or backward turning of a person is not easy to occur when the person takes the seat. In the folded state, the back support tube 5, the front foot tube 3 and the rear foot tube 4 are staggered, and all the foot tubes are completely under the chair surface, so that the folding volume is small and the occupied space is small.

When the moon chair is folded, the front foot tube 3 and the rear foot tube 4 are both backwards close to the seat ring tube 2, the back support tube 5 is forwards close to the seat ring tube 2, the sliding support tube 6 is close to the rear foot tube 4, and finally the moon chair is folded. When the folding chair is completely folded, the foot pipes are completely arranged under the chair surface, the front foot pipe 3, the rear foot pipe 4 and the back support pipe are not overlapped in a staggered way, the rotating connecting piece 1 and the sliding sleeve 7 are used as rotating connecting points to be distributed in tandem, so that the stacking of the foot pipes is avoided to the greatest extent, and the folding volume is small.

Example two

Another structure of moon chair is also described in this embodiment.

As shown in fig. 5 and 6, a moon chair comprises a seat and a frame including a rotary link 1, wherein only one side of the rotary link 1 is provided with a boss 102, and the rest of the structure is the same as the rotary link 1 in the first embodiment.

The chair frame comprises a seat ring pipe 2, a front foot pipe 3, a rear foot pipe 4, a back support pipe 5 and a sliding support pipe 6, wherein the front foot pipe 3 is in X-shaped cross hinge with the rear foot pipe 4, a rotating connecting piece 1 is sleeved on the upper end of the front foot pipe 3 through a slot 103, the upper end of the back support pipe 5 is hinged with the rear part of the seat ring pipe 2, the lower end of the back support pipe 5, the upper end of the front foot pipe 3 and the rotating connecting piece 1 are connected through a hinge shaft inserted in a hinge hole 104 of the rotating connecting piece 1, the rotating connecting piece 1 is provided with a boss 102, the lower end of the back support pipe 5 is hinged on the boss 102, the upper end of the rear foot pipe 4 is hinged with the upper part of the sliding support pipe 6, the upper end of the sliding support pipe 6 is hinged with the front part of the seat ring pipe 2, the lower end of the sliding support pipe 6 is arranged on the front foot pipe 3 in a sliding way through a sliding sleeve 7, and a fixed sleeve 9 used for limiting the movement range of the sliding support pipe 6 is arranged on the front foot pipe 3. In order to stabilize the structure and balance the stress, the structure of the chair frame is arranged in a left-right mirror image way. The hinge shaft may be of various types including, but not limited to, pins, bolts, rivets.

The upper end of the back support pipe 5 and the upper end of the sliding support pipe 6 are hinged with the seat ring pipe 2 through a U-shaped piece 8, the top of the U-shaped piece 8 is fixed with the seat ring pipe 2, and the upper end of the back support pipe 5 and the upper end of the sliding support pipe 6 are hinged between two side plates at the opening of the corresponding U-shaped piece 8; the appearance of the sliding sleeve 7 main body is U-shaped, the opening end of the sliding sleeve 7 is hinged with the lower end of the sliding support tube 6, the closed end of the sliding sleeve 7 is of a circular tube structure, the closed end of the sliding sleeve 7 is sleeved on the front foot tube 3, and the sliding sleeve 7 slides on the rear foot tube 4 when the moon chair is folded or unfolded.

The front foot tube 3 and the rear foot tube 4 are U-shaped tubes with upward open ends, the back support tube 5 and the sliding support tube 6 are provided with a left tube and a right tube, the rotary connecting piece 1 is provided with a left tube and a right tube, and the front foot tube 3, the rear foot tube 4 and the back support tube are mutually staggered and hinged and are not overlapped after being folded.

The lower end of the back support tube 5 is hinged with the upper end of the front foot tube 3 through a hinge shaft, the hinge shaft is arranged in the front foot tube 3 in a penetrating mode, the front foot tube 3 directly supports the hinge shaft, the rotary connecting piece 1 is not directly stressed, the back support tube 5 obtains powerful support of the front foot tube 3, and the front foot tube 3, the rear foot tube 4 and the sliding support tube 6 form a stable triangular support to support the back support tube 5, so that the chair frame is stable in structure and not easy to turn forwards or backwards.

When the moon chair is folded, the front foot tube 3 and the rear foot tube 4 are both backwards close to the seat ring tube 2, the back support tube 5 is forwards close to the seat ring tube 2, the sliding support tube 6 is close to the front foot tube 3, and finally the moon chair is folded. When the folding chair is completely folded, the foot pipes are completely arranged under the chair surface, the front foot pipe 3, the rear foot pipe 4 and the back support pipe are staggered and are not overlapped, the rotating connecting piece 1 and the sliding sleeve 7 are used as rotating connecting points to be distributed one behind the other, so that the stacking of the foot pipes is avoided to the greatest extent, the folding volume is small, the occupied space is small, and the packaging, the transportation and the storage are more convenient.

The above embodiments are only for illustrating the technical solution of the present utility model, and are not limiting; although the utility model has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present utility model.

Claims (10)

1. A rotary joint, characterized in that: including the connecting piece main part, connecting piece main part outside is equipped with the boss on at least one side, and the connecting piece main part has the slot of vertical setting and the hinge hole of horizontal setting, hinge hole and slot intercommunication, hinge hole run through connecting piece main part and boss.

2. The rotary joint according to claim 1, wherein: the slots are round hole slots, flat hole slots or square hole slots.

3. The rotary joint according to claim 1, wherein: one end of the slot is an open end, and the other end is a closed end.

4. The rotary joint according to claim 1, wherein: the middle part of one end of the boss far away from the connecting piece main body is inwards concave to form a groove, and a flange is formed around the groove.

5. A folding chair, characterized in that: comprising a seat and a seat frame comprising a swivel joint according to any one of claims 1 to 4.

6. A moon chair, characterized in that: the chair comprises a seat and a chair frame, wherein the chair frame comprises a rotary connecting piece according to any one of claims 1 to 4, the chair frame comprises a seat ring pipe, a front foot pipe, a rear foot pipe, a back support pipe and a sliding support pipe, the upper end of the back support pipe is hinged with the rear part of the seat ring pipe, the front foot pipe is in X-shaped cross hinge with the rear foot pipe, the rotary connecting piece is sleeved at the upper end of the front foot pipe through a slot, the upper end of the front foot pipe, the lower end of the back support pipe, the upper end of the sliding support pipe and the rotary connecting piece are connected through a hinge shaft inserted in a hinge hole of the rotary connecting piece, bosses are arranged on two sides of the rotary connecting piece, the hinge hole penetrates through the two bosses, the lower end of the back support pipe and the upper end of the sliding support pipe are hinged on the bosses on two sides of the rotary connecting piece respectively, the lower end of the sliding support pipe is arranged on the rear foot pipe in a sliding mode through a sliding sleeve, a fixed sleeve used for limiting the movement range of the sliding support pipe is arranged in a left mirror image and right image mode.

7. The lunar chair as claimed in claim 6 wherein: the upper end of the back support pipe and the upper end of the front foot pipe are hinged with the seat ring pipe through U-shaped pieces, the top of the U-shaped pieces are fixed with the seat ring pipe, and the upper end of the back support pipe and the upper end of the front foot pipe are hinged between two side plates at the corresponding openings of the U-shaped pieces; the appearance of the sliding sleeve main body is U-shaped, the opening end of the sliding sleeve is hinged with the lower end of the sliding support tube, the closed end of the sliding sleeve is of a circular tube structure, and the closed end of the sliding sleeve is sleeved on the rear foot tube.

8. A moon chair, characterized in that: the chair comprises a seat and a chair frame, wherein the chair frame comprises a rotary connecting piece according to any one of claims 1 to 4, the chair frame comprises a seat ring pipe, a front foot pipe, a rear foot pipe, a back support pipe and a sliding support pipe, the front foot pipe and the rear foot pipe are in X-shaped cross hinge, the rotary connecting piece is sleeved at the upper end of the front foot pipe through a slot, the upper end of the back support pipe is hinged with the rear part of the seat ring pipe, the lower end of the back support pipe, the upper end of the front foot pipe and the rotary connecting piece are connected through a hinge shaft inserted in a hinge hole of the rotary connecting piece, the rotary connecting piece is provided with a boss, the lower end of the back support pipe is hinged on the boss, the upper end of the back foot pipe is hinged with the upper part of the sliding support pipe, the lower end of the sliding support pipe is arranged on the front foot pipe in a sliding manner through a sliding sleeve, a fixed sleeve used for limiting the movement range of the sliding support pipe is arranged on the front foot pipe in a mirror image manner.

9. The lunar chair as claimed in claim 8 wherein: the upper end of the back support pipe and the upper end of the sliding support pipe are hinged with the seat ring pipe through U-shaped pieces, the top of each U-shaped piece is fixed with the seat ring pipe, and the upper ends of the back support pipe and the upper ends of the sliding support pipes are hinged between two side plates at the corresponding openings of the U-shaped pieces; the appearance of the sliding sleeve main body is U-shaped, the opening end of the sliding sleeve is hinged with the lower end of the sliding support tube, the closed end of the sliding sleeve is of a circular tube structure, and the closed end of the sliding sleeve is sleeved on the front foot tube.

10. The moon chair according to claim 6 or 8, wherein: the front foot tube and the rear foot tube are U-shaped tubes with upward open ends, the back support tube and the sliding support tube are respectively provided with a left part and a right part, the rotating connecting piece is provided with a left part and a right part, and the front foot tube, the rear foot tube and the back support tube are mutually staggered and hinged so as to prevent the folding back from being overlapped.