Outdoor trolley

Abstract

The utility model provides an outdoor trolley which has a folded state and an unfolded state and comprises a bottom frame assembly. An armrest linkage assembly; a frame assembly; the frame assemblies are arranged on the front and rear sides of the underframe assembly; the linkage structure is connected with the handrail linkage assembly and the underframe assembly through hinges, the linkage structure comprises a sliding part, the sliding part is arranged on the frame assembly and can move between the first position and the second position of the frame assembly, and when the sliding part moves to the first position, the outdoor trolley is in a folded state; and when the sliding piece moves to the second position, the outdoor trolley is in an unfolded state. Through the design of the sliding part, folding and unfolding operation of the trolley is very simple and convenient, a user can quickly complete folding or unfolding operation of the trolley only by sliding the sliding part to different positions, the complex operation process of a traditional trolley is omitted, and the operation experience of the user is improved.

Description

Technical Field

[0001] This utility model relates to the field of trolley technology, and in particular to an outdoor handcart. Background Technology

[0002] There are many types of outdoor strollers in the current technology. Most of them have fixed structures for the armrests and leg tubes, which occupy a lot of space when not in use. In terms of folding, the current technology is relatively cumbersome and cannot be completed easily and quickly. In addition, it usually requires more than one user to operate, resulting in a poor user experience and a large size after being folded.

[0003] Chinese patent document CN218287777U, published in January 2023, discloses a folding trolley, specifically including a frame structure and a body structure mounted on the frame structure. The body structure includes a front frame structure, which comprises two horizontal folding rods with folding joints in the middle, a front frame upright, and two front frame diagonal braces. The two horizontal folding rods are rotatably connected to the two side rods via general fixings or extended fixings. The upper and lower ends of the front frame upright are connected to the folding joints. The front frame upright is provided with a sliding sleeve that can slide along its length. One end of each of the two diagonal braces is hinged to the sliding sleeve, and the other end is hinged to the foldable sides of the horizontal rods or the ends of the side rods. Due to the large number of movable connecting parts, the aforementioned patent document makes folding the trolley cumbersome and does not allow for a simple and quick folding operation.

[0004] Therefore, further improvements are needed. Utility Model Content

[0005] Therefore, the purpose of this utility model is to provide an outdoor handcart that overcomes the shortcomings of the prior art. This handcart can be folded quickly, is simple and convenient to operate, and improves the user's operating experience.

[0006] An outdoor handcart designed for this purpose has a folded state and an unfolded state. The outdoor handcart includes a base frame assembly; a handle linkage assembly; a frame assembly; the frame assembly is disposed on the front and rear sides of the base frame assembly; and a linkage structure, which is hinged to the handle linkage assembly and the base frame assembly. The linkage structure includes a slider, which is disposed on the frame assembly and can move between a first position and a second position of the frame assembly. When the slider is moved to the first position, the outdoor handcart is in the folded state; when the slider is moved to the second position, the outdoor handcart is in the unfolded state.

[0007] The linkage structure also includes a linkage component, one end of which is connected to the base frame assembly, and the other end of which is connected to the sliding member.

[0008] The linkage assembly includes a first link and a second link that are hinged together. The first link is connected to the base frame assembly, and the second link is connected to the first fixed part of the sliding member. When the sliding member moves to the first position, the first link and the second link rotate relative to each other, thereby driving the base frame assembly to rotate.

[0009] The chassis assembly includes a front chassis and a rear chassis arranged opposite to each other, which are hinged together and can rotate relative to each other; an elastic structure is provided between the front chassis and the rear chassis, so that in the folded state, the rear chassis and the front chassis are brought closer together through the elastic structure; or, the rear chassis is brought closer to the front chassis through the elastic structure; or, the front chassis is brought closer to the rear chassis through the elastic structure.

[0010] The elastic structure includes a tension spring, one end of which is connected to the front chassis and the other end of which is connected to the rear chassis.

[0011] The handrail linkage assembly includes at least one pair of first tubes, and the linkage structure further includes a third link. One end of the third link is connected to the first tube, and the other end of the third link is connected to the second fixing part of the sliding member. When the sliding member moves to the first position, the first tube rotates downward under the action of the third link.

[0012] The handrail linkage assembly also includes at least one pair of second tubes, one end of which is provided with a rotating tooth, and the pair of second tubes rotate through the meshing of the rotating tooth.

[0013] The handrail linkage assembly also includes a fixed base, which has a first accommodating space for the first tube to rotate and a second accommodating space for the rotating gear to rotate. The other ends of the first tube and the second tube can rotate relative to the fixed base.

[0014] The linkage structure also includes a fourth link, and the outdoor handcart also includes a pusher assembly. The pusher assembly is rotatably mounted on the frame assembly and can be flipped up and down. One end of the fourth link is connected to the third fixing part of the slider, and the other end of the fourth link is connected to the pusher assembly. The fourth link is flipped up and down by the pusher assembly so that the slider slides up and down on the frame assembly.

[0015] The frame assembly includes at least one pair of frame bodies, which are respectively spaced apart front and rear on the underframe assembly. Each frame body is provided with a support member for supporting the underframe assembly and a positioning member for fixing and connecting the first tube body. The support member and the positioning member are spaced apart along the height direction of the frame body.

[0016] The support member has a protrusion at one end to support the base frame assembly, and the other end of the support member is fixedly connected to one side of the frame body.

[0017] One end of the positioning component is fixedly connected to one side of the frame, and the other end of the positioning component is fixedly connected to the first tube.

[0018] Compared with the prior art, the outdoor trolley of the above embodiment has a sliding member mounted on the frame assembly, which can slide between a first position and a second position of the frame assembly. The movement of the sliding member can trigger the folding or unfolding of the frame assembly and the handle linkage assembly. When the sliding member is in the first position, the trolley is in a folded state; when the sliding member is in the second position, the trolley is in an unfolded state. The design of the sliding member makes the folding and unfolding operation of the trolley very simple. Users only need to slide the sliding member to different positions to quickly complete the folding or unfolding operation of the trolley, eliminating the complicated operation process of traditional trolleys. The overall structural design makes folding and unfolding more efficient and improves the user's operating experience. Moreover, in the folded state, the frame assembly and the base frame assembly are closely close together, reducing the storage space occupied. Attached Figure Description

[0019] The accompanying drawings, which form part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention.

[0020] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the unfolded outdoor handcart in one embodiment of the present invention.

[0022] Figure 2 This is an exploded view of an outdoor handcart according to one embodiment of the present invention.

[0023] Figure 3 This is a cross-sectional view of the handrail linkage component in one embodiment of the present invention.

[0024] Figure 4 This is a schematic diagram of the sliding component structure in one embodiment of the present invention.

[0025] Figure 5 This is a schematic diagram of the linkage structure and sliding component structure in one embodiment of the present invention.

[0026] Figure 6 This is a schematic diagram of an outdoor handcart in the folding state according to one embodiment of the present invention.

[0027] Figures 7-8 These are schematic diagrams showing the outdoor handcart gradually folding in one embodiment of this utility model.

[0028] Figure 9 This is a schematic diagram of an outdoor handcart in a folded state according to one embodiment of the present invention. Detailed Implementation

[0029] To make the above-mentioned objects, features, and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a full understanding of this utility model. However, this utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed below.

[0030] like Figures 1-9 As shown, an outdoor handcart is provided, which has a folded state and an unfolded state. The outdoor handcart includes a base frame assembly 1; a handle linkage assembly 2; a frame assembly 3; the frame assembly 3 is disposed on the front and rear sides of the base frame assembly 1; and a linkage structure 4, which is connected to the handle linkage assembly 2 and the base frame assembly 1 by hinges. The linkage structure 4 includes a slider 41, which is disposed on the frame assembly 3 and can move between a first position a and a second position b of the frame assembly 3. When the slider 41 moves to the first position a, the outdoor handcart is in the folded state, and when the slider 41 moves to the second position b, the outdoor handcart is in the unfolded state.

[0031] Specifically, the slider 41 is mounted on the frame assembly 3 and can slide between the first position a and the second position b of the frame assembly 3. The movement of the slider 41 can trigger the folding or unfolding of the frame assembly 3 and the handlebar linkage assembly 2. When the slider 41 is in the first position a, the trolley is in a folded state; when the slider 41 is in the second position b, the trolley is in an unfolded state. The design of the slider 41 makes the folding and unfolding operation of the trolley very simple. Users can quickly complete the folding or unfolding operation of the trolley by simply sliding the slider 41 to different positions, eliminating the complicated operation process of traditional trolleys. The overall structural design makes folding and unfolding more efficient and improves the user's operating experience. In the folded state, the frame assembly 3 and the base frame assembly 1 are closely close together, reducing the storage space occupied.

[0032] Furthermore, such as Figures 1-2 As shown, the linkage structure 4 also includes a linkage component 42, one end of which is connected to the base frame component 1, and the other end of which is connected to the sliding member 41.

[0033] Specifically, when the slider 41 slides on the frame assembly 3, the linkage assembly 42 transmits the movement of the slider 41 to the underframe assembly 1, ensuring that the underframe assembly can be stably folded and unfolded under the action of the slider 41; the linkage assembly 42 effectively improves the collaborative working ability between the slider and the underframe assembly.

[0034] Furthermore, such as Figures 1-2 As shown, the linkage assembly 42 includes a first link 421 and a second link 422 that are hinged together. The first link 421 is connected to the base frame assembly 1, and the second link 422 is connected to the first fixed part 411 of the sliding member 41. When the sliding member 41 moves to the first position a, the first link 421 and the second link 422 rotate relative to each other, thereby driving the base frame assembly 1 to rotate.

[0035] Specifically, when the slider 41 moves to the first position a, the connection between the slider and the second link 422 causes the first link 421 and the second link 422 to rotate relative to each other, thereby causing the chassis assembly 1 to rotate. At this time, the chassis assembly 1 begins to change to a folded state; when the slider 41 slides to the second position b, the relative rotation between the second link 422 and the first link 421 is released, and the chassis assembly 1 returns to the unfolded state; the linkage assembly 42 simplifies the folding and unfolding operation of the chassis assembly 1 through the cooperation of the first link 421 and the second link 422. The user only needs to slide the slider 41 to the designated position to trigger the folding or unfolding action of the entire frame.

[0036] Furthermore, such as Figures 1-2 , Figures 5-9As shown, the chassis assembly 1 includes a front chassis 11 and a rear chassis 12 disposed opposite to each other, which are connected by a hinge and can rotate relative to each other; an elastic structure 5 is provided between the front chassis 11 and the rear chassis 12. In the folded state, the rear chassis 12 and the front chassis 11 are brought closer together by the elastic structure 5; or, the rear chassis 12 is brought closer to the front chassis 11 by the elastic structure 5; or, the front chassis 11 is brought closer to the rear chassis 12 by the elastic structure 5.

[0037] Specifically, the elastic structure 5 allows the base frame assembly 1 to automatically adapt when folded, reducing the force required for the user to operate during folding; the elastic structure 5 also allows the base frame assembly 1 to be folded more compactly, reducing the space occupied by the trolley when stored.

[0038] Furthermore, such as Figure 1 As shown, the elastic structure 5 includes a tension spring, one end of which is connected to the front base frame 11, and the other end of which is connected to the rear base frame 12.

[0039] Specifically, the front base frame 11 and the rear base frame 12 are equipped with hooks that cooperate with tension springs. Through this connection, the tension springs provide elastic support between the front base frame 11 and the rear base frame 12. The tension of the tension springs plays a role during folding, making the folding of the base frame assembly smoother and facilitating the assembly to close together in the folded state. In the folded state, the tension springs provide traction to the front base frame 11, causing the rear base frame 12 to automatically move towards the front base frame 11, facilitating the storage of the trolley. In the unfolded state, the elastic effect of the tension springs gradually dissipates, and the front and rear base frames return to their unfolded state.

[0040] Furthermore, such as Figures 1-3 As shown, the handrail linkage assembly 2 includes at least one pair of first tubes 21, and the linkage structure 4 also includes a third link 43. One end of the third link 43 is connected to the first tube 21, and the other end of the third link 43 is connected to the second fixing part 412 of the slider 41. When the slider 41 moves to the first position a, the first tube 21 rotates downward under the action of the third link 43.

[0041] Specifically, when the slider 41 moves to the first position a, the third link 43 causes the first tube 21 to rotate downwards under the action of the third link 43. This movement realizes the folding or unfolding of the handrail, providing a smoother folding operation for the trolley. Through the connection of the third link 43, the handrail linkage assembly 2 and the slider 41 cooperate with each other to ensure that when the slider 41 slides, the rotation of the handrail linkage assembly 2 is synchronized, precisely controlling the change of handrail position during the folding and unfolding process.

[0042] Furthermore, such as Figures 1-3As shown, the handrail linkage assembly 2 also includes at least one pair of second tubes 22, one end of which is provided with a rotating tooth 221, and the pair of second tubes 22 rotate through the meshing of the rotating tooth 221.

[0043] Specifically, the second tube 22 rotates by engaging the rotating teeth 221, which enables the second tube 22 to rotate smoothly under the action of the sliding member 41 and the third connecting rod 43. When the sliding member 41 moves to the first position a, the rotating teeth 221 ensure that the second tube 22 rotates toward the base frame assembly 1, thereby driving the movement of the handle linkage assembly and coordinating to complete the folding process of the trolley.

[0044] Furthermore, such as Figures 1-3 As shown, the handrail linkage assembly 2 also includes a fixed base 23. The fixed base 23 is provided with a first receiving space 231 for the second tube 21 to rotate and a second receiving space 232 for the rotating tooth 221 to rotate. The other ends of the first tube 21 and the second tube 22 can rotate relative to the fixed base 23.

[0045] Specifically, the second tube 21 is hinged to the first receiving space 231. The hinge point allows the second tube 21 to rotate freely within the receiving space 231, ensuring that the second tube 21 can rotate flexibly during folding and unfolding, cooperating with the overall movement of the armrest linkage assembly 2. The rotating tooth 221 rotates on the second receiving space 232 via a rotating shaft. The rotating shaft allows the rotating tooth 221 to rotate freely within the second receiving space 232, ensuring that the rotating tooth 221 can precisely mesh with the rotating tooth 221 of the other second tube 22 during the rotation of the second tube 21, thereby completing the rotation control of the armrest part.

[0046] Furthermore, such as Figure 1 , Figure 2 and Figure 5 As shown, the linkage structure 4 also includes a fourth link 44, and the outdoor handcart also includes a pusher assembly 6. The pusher assembly 6 is rotatably mounted on the frame assembly 3. One end of the fourth link 44 is connected to the third fixing part 413 of the slider 41, and the other end of the fourth link 44 is connected to the pusher assembly 6. The fourth link 44 rotates up and down through the pusher assembly 6, so that the slider 41 slides up and down on the frame assembly 3.

[0047] Specifically, the up-and-down flipping operation of the pusher assembly 6, in conjunction with the fourth link 44, causes the slider 41 to slide on the frame assembly 3, thereby triggering the folding or unfolding action of the trolley.

[0048] When the fourth link 44 drives the slider 41 to slide through the rotation of the pusher assembly 6, the up and down sliding of the slider 41 on the frame assembly 3 realizes the transformation of the trolley from the folded state to the unfolded state; the movement of the slider 41 is controlled by the pusher assembly 6, making the entire folding and unfolding process smoother and more controllable.

[0049] Furthermore, such as Figure 1 , Figure 2 and Figure 5 As shown, the frame assembly 3 includes at least one pair of frame bodies 31. The pair of frame bodies 31 are respectively spaced apart front and rear on the base frame assembly 1. The frame body 31 is provided with a support member 311 for supporting the base frame assembly 1 and a positioning member 312 for fixing and connecting the first tube body 21. The support member 311 and the positioning member 312 are spaced apart along the height direction of the frame body 31.

[0050] One end of the support member 311 is provided with a protrusion 3111 that supports the base frame assembly 1, and the other end of the support member 311 is fixedly connected to one side of the frame 31.

[0051] One end of the positioning component 312 is fixedly connected to one side of the frame 31, and the other end of the positioning component 312 is fixedly connected to the first tube 21.

[0052] Specifically, the support member 311 effectively supports the base frame assembly 1 through its protrusion 3111, avoiding shaking or instability during use; the positioning member 312 ensures the precise connection between the handrail linkage assembly 2 (especially the first tube 21) and the frame assembly 3, avoiding misalignment or instability between the handrail part and the frame part.

[0053] Furthermore, the frame 31 is equipped with casters at the bottom to ensure the trolley can travel smoothly in different environments; the casters generally consist of four or more, of which at least two are swivel wheels and the other two can be directional wheels or omnidirectional wheels to ensure flexible operation of the outdoor trolley in multiple directions.

[0054] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0055] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0056] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0057] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0058] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0059] It should also be understood that, in interpreting the connection or positional relationships of components, although not explicitly described, connection and positional relationships are interpreted to include a range of error, which should be within the acceptable deviation range of a specific value as determined by a person skilled in the art. For example, "approximately," "about," or "substantially" can mean within one or more standard deviations, without limitation herein.

[0060] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0061] The above embodiments only illustrate several implementation methods of this utility model, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. An outdoor trolley having a folded state and an unfolded state, characterised in that: The outdoor handcart comprises a chassis assembly (1); a handrail linkage assembly (2); a frame assembly (3) arranged on the two sides of the chassis assembly (1); a linkage structure (4) connected with the handrail linkage assembly (2) and the chassis assembly (1) through hinging, the linkage structure (4) comprising a sliding piece (41) arranged on the frame assembly (3) and movable between a first position (a) and a second position (b) of the frame assembly (3), when the sliding piece (41) moves to the first position (a), the outdoor handcart is in the folded state, and when the sliding piece (41) moves to the second position (b), the outdoor handcart is in the unfolded state.

2. The outdoor stroller of claim 1, wherein: The linkage structure (4) further comprises a linkage assembly (42) connected with the chassis assembly (1) at one end and connected with the sliding piece (41) at the other end.

3. The outdoor stroller of claim 2, wherein: The linkage assembly (42) comprises a first connecting rod (421) and a second connecting rod (422) hinged with each other, the first connecting rod (421) is connected with the chassis assembly (1), and the second connecting rod (422) is connected with a first fixing part (411) of the sliding piece (41); when the sliding piece (41) moves to the first position (a), the first connecting rod (421) rotates relative to the second connecting rod (422), thereby driving the chassis assembly (1) to rotate.

4. The outdoor stroller of claim 1, wherein: The chassis assembly (1) comprises a front chassis (11) and a rear chassis (12) arranged oppositely and connected through hinging and capable of rotating relative to each other; an elastic structure (5) is arranged between the front chassis (11) and the rear chassis (12), in the folded state, the rear chassis (12) and the front chassis (11) are close to each other through the elastic structure (5); or the rear chassis (12) is close to the front chassis (11) through the elastic structure (5); or the front chassis (11) is close to the rear chassis (12) through the elastic structure (5).

5. The outdoor stroller of claim 4, wherein: The elastic structure (5) comprises a tension spring, one end of the tension spring is connected with the front chassis (11), and the other end of the tension spring is connected with the rear chassis (12).

6. The outdoor stroller of claim 1, wherein: The handrail linkage assembly (2) comprises at least one pair of first pipe bodies (21) arranged, the linkage structure (4) further comprises a third connecting rod (43), one end of the third connecting rod (43) is hinged with the first pipe body (21), and the other end of the third connecting rod (43) is connected with a second fixing part (412) of the sliding piece (41); when the sliding piece (41) moves to the first position (a), the first pipe body (21) rotates downward under the action of the third connecting rod (43).

7. The outdoor stroller of claim 6, wherein: The handrail linkage assembly (2) further comprises at least one pair of second pipe bodies (22) arranged, one end of the second pipe body (22) is provided with a rotating tooth (221), and the pair of second pipe bodies (22) are meshed and rotated through the rotating tooth (221).

8. The outdoor stroller of claim 7, wherein: The handrail linkage assembly (2) further comprises a fixing base (23), the fixing base (23) is provided with a first containing space (231) for rotating the first pipe body (21) and a second containing space (232) for rotating the rotating tooth (221), and the other end of the first pipe body (21) and the second pipe body (22) can rotate relative to the fixing base (23) respectively.

9. The outdoor stroller of any of claims 1-8, wherein: The linkage structure (4) further comprises a fourth connecting rod (44), the outdoor trolley further comprises a push handle assembly (6), the push handle assembly (6) can be up-down flipped and rotatably arranged on the frame assembly (3), one end of the fourth connecting rod (44) is connected with the third fixing part (413) of the sliding part (41), the other end of the fourth connecting rod (44) is connected with the push handle assembly (6), the fourth connecting rod (44) is up-down flipped and rotated through the push handle assembly (6), so that the sliding part (41) slides up and down on the frame assembly (3).

10. The outdoor stroller of claim 8, wherein: The frame assembly (3) comprises at least one pair of arranged frame bodies (31), a pair of the frame bodies (31) are arranged in front of and behind the chassis assembly (1) respectively, the frame body (31) is provided with a supporting part (311) for supporting the chassis assembly (1) and a positioning part (312) for fixedly connecting the first pipe body (21), and the supporting part (311) and the positioning part (312) are arranged in the height direction of the frame body (31) in a spaced manner; One end of the supporting part (311) is provided with a protruding part (3111) for supporting the chassis assembly (1), and the other end of the supporting part (311) is fixedly connected with one side of the frame body (31); One end of the positioning part (312) is fixedly connected with one side of the frame body (31), and the other end of the positioning part (312) is fixedly connected with the first pipe body (21). One end of the positioning part (312) is fixedly connected with one side of the frame body (31), and the other end of the positioning part (312) is fixedly connected with the first pipe body (21).

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