A support rotating assembly, a rotating support and a unicycle

Abstract

The utility model belongs to the technical field of support, specifically relates to a support rotating assembly, rotating support and unicycle, it includes mounting seat, support piece, first connecting piece and elastic telescopic component. The mounting seat is equipped with first limit groove and second limit groove, pulls the support piece and separates first limit groove or second limit groove, and the elastic telescopic component is in the first telescopic state, and the first connecting piece is located in the first position of sliding slot, loosens the support piece to make the first end of support piece extend into first limit groove or second limit groove, and the elastic telescopic component is in the second telescopic state, and the first connecting piece is located in the second position of sliding slot. Its through the sliding space provided with the sliding groove and the elastic force effect of elastic telescopic component, makes the support piece can extend mounting seat from different angles, simple and flexible operation, and the anti -vibration ability becomes stronger, and the stability enhances.

Description

Technical Field

[0001] This utility model belongs to the field of support technology, specifically relating to a support rotation component, a rotating support, and a unicycle. Background Technology

[0002] Rotation functionality is widely used in modern electronic devices, mechanical devices, and everyday items, such as monitor stands, mobile phone stands, and robotic arms. Existing rotation mechanisms typically employ several fixing principles to achieve angle adjustment and locking functions, such as: screw fixing, where positioning holes are provided on the rotation mechanism and the bracket, and screws are used to fix the two together; or, locking fixing, where a clamping mechanism such as a locking band or clamping rod is used to fix the rotation mechanism and the bracket; or, damping connection, where a damper is placed between the rotation mechanism and the bracket, and the frictional damping provided by the damper achieves the fixation of the rotation mechanism and the bracket.

[0003] However, rotating supports fixed with screws require additional tools for adjustment, and rotating supports using locking methods and damping rotation mechanisms have insufficient vibration resistance in vibration environments. Therefore, there is an urgent need for a rotating support mechanism that can provide flexible adjustment and stable support, while also enhancing the vibration resistance of the support. Utility Model Content

[0004] The purpose of this utility model is to at least solve one of the technical problems existing in the prior art, and to provide a support rotating assembly, a rotating support and a unicycle, which, through the sliding space provided by the sliding groove and the elastic force of the elastic telescopic assembly, allows the support to extend from the mounting seat from different angles, making the operation simple and flexible, and enhancing the vibration resistance and stability.

[0005] The technical solution adopted by this utility model to solve its technical problem is:

[0006] In a first aspect, a support rotation assembly includes:

[0007] The mounting base is provided with a first limiting groove and a second limiting groove;

[0008] A support member is hinged to the mounting base via a first connector. The first end of the support member engages with the first limiting groove or the second limiting groove. The first end of the support member is provided with a sliding groove that extends in the left-right direction and a mounting groove that communicates with the sliding groove. The first connector passes through the sliding groove in the left-right direction.

[0009] An elastic telescopic component is disposed within the mounting groove and abuts against the first connector;

[0010] When the first end of the support extends into the first limiting groove, a first angle is formed between the support and the mounting base; when the first end of the support extends into the second limiting groove, a second angle is formed between the support and the mounting base.

[0011] In conjunction with the first aspect, in some implementations of the first aspect, the mounting groove is located on the side of the sliding groove near the first end of the support member, the elastic telescopic assembly includes an elastic member and a limiting cylinder, one end of the elastic member abuts against the mounting groove, the other end of the elastic member extends into the limiting cylinder and abuts against the limiting cylinder, and the end of the limiting cylinder opposite to the elastic member abuts against the first connecting member.

[0012] In combination with the first aspect and the above-described implementations, in some implementations of the first aspect, the support member has a main body and an end head. The end head is located at one end of the main body. The support member is engaged with the first limiting groove or the second limiting groove through the end head. The main body is provided with the sliding groove at one end near the end head. The end head is provided with the mounting groove. The mounting groove is connected to the sliding groove along the extending direction of the end head.

[0013] In combination with the first aspect and the above-described implementations, in some implementations of the first aspect, the main body has an inclined section and a vertical section connected together, the end of the inclined section away from the vertical section is provided with the end head, the end of the vertical section forms the second end of the support member, and is provided with a connecting groove extending in the left-right direction.

[0014] In combination with the first aspect and the above-described implementations, in some implementations of the first aspect, the sliding groove is an oblong hole, the width of the sliding groove in the left-right direction is greater than the outer diameter of the end head, the limiting cylinder includes a cylinder body and an abutment portion connected to the cylinder body, the abutment portion is slidably installed in the sliding groove, the first connecting member abuts against the abutment portion, the cylinder body extends into the mounting groove and is sleeved on the outside of the elastic member.

[0015] In combination with the first aspect and the above-described implementations, in some implementations of the first aspect, the mounting base has two protrusions spaced apart in the left-right direction, the mounting base is provided with a first limiting groove and a second limiting groove between the two protrusions, the first end of the support member is installed between the two protrusions, and the first connecting member is installed between the two protrusions after passing through the sliding groove.

[0016] In combination with the first aspect and the above implementation, in some implementations of the first aspect, the mounting base is provided with a forward-extending extension between the two protrusions, and a groove is formed between the mounting base, the extension, and the two protrusions. An upper opening and a front opening communicating with the groove are formed between the two protrusions. The first limiting groove is provided in the extension, and the second limiting groove is provided in the mounting base portion behind the protrusion.

[0017] When the first end of the support member extends into the first limiting groove, the support member extends out from the upper opening; when the first end of the support member extends into the second limiting groove, the support member extends out from the front opening.

[0018] In combination with the first aspect and the above-described implementation, in some implementations of the first aspect, the support member has structures on its opposite sides that abut against the extension and the mounting seat portion on the rear side of the protrusion, and the groove between the first limiting groove and the second limiting groove is a transition arc surface.

[0019] In a second aspect, a rotating bracket includes a second connector and a bracket rotating assembly as described in any implementation of the first aspect. The bracket rotating assembly is provided in two sets, and the two sets of bracket rotating assemblies are spaced apart in the left-right direction. The second connector is disposed between the second ends of the support members of the two sets of bracket rotating assemblies.

[0020] Thirdly, a unicycle includes a frame, wheels, and a rotating support as described in any of the second aspects. The wheels are rotatably disposed below the frame, the rotating support is disposed in front of and / or behind the frame, and the rotating components of the support are distributed on both sides of the wheels. When the first end of the support member extends into the first limiting groove, the rotating support abuts against the frame to be in a retracted state. When the first end of the support member extends into the second limiting groove, the rotating support and the frame form a predetermined angle to be in an extended state.

[0021] One of the above technical solutions has at least one of the following advantages or beneficial effects: The bracket rotation assembly, rotating bracket and unicycle of this technical solution, by setting a first limiting groove and a second limiting groove that cooperate with the first end of the support member, and by utilizing the sliding space provided by the sliding groove and the elastic force of the elastic telescopic component, enables the support member to stably switch between the first limiting groove and the second limiting groove, thereby ensuring that the support member can extend from the mounting seat from different angles and realize the function of rotating the support member. The operation is simple and flexible, and the stability is strong.

[0022] In addition, by setting up an elastic telescopic component, when the bracket rotation component is in working state, that is, when the support rotates to the preset position of the mounting base and cooperates with the first or second limit groove, the elastic telescopic component can absorb the vibration of the bracket, strengthen the vibration resistance, and help improve the stable support capacity of the bracket rotation component during operation. Attached Figure Description

[0023] The present invention will be further described below with reference to the accompanying drawings:

[0024] Figure 1 This is a schematic diagram of the structure of one embodiment of the bracket rotation assembly of this utility model;

[0025] Figure 2 yes Figure 1 An exploded view of one embodiment is shown;

[0026] Figure 3 yes Figure 1 A cross-sectional schematic diagram of one embodiment is shown;

[0027] Figure 4 yes Figure 1 A schematic diagram of the mounting base of one embodiment is shown;

[0028] Figure 5 This is a schematic diagram of the structure of one embodiment of the rotating bracket of this utility model;

[0029] Figure 6 This is a structural schematic diagram of one embodiment of the unicycle of this utility model.

[0030] Explanation of icon numbers:

[0031] Mounting base 1; protrusion 11; through hole 111; nut 112; first limiting groove 121; second limiting groove 122; extension 13; groove 14; upper opening 141; front opening 142; transition arc surface 143; support member 2; sliding groove 21; mounting groove 22; main body 23; inclined section 231; vertical section 232; end head 24; connecting groove 25; first connector 3; elastic telescopic assembly 4; elastic member 41; limiting cylinder 42; cylinder body 421; abutment part 422; second connector 5; bracket rotating assembly 6; rotating bracket 7; unicycle 8; frame 81; wheel 82. Detailed Implementation

[0032] This section will describe in detail the specific embodiments of the present utility model. The preferred embodiments of the present utility model are shown in the accompanying drawings. The purpose of the drawings is to supplement the textual description with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present utility model, but they should not be construed as limiting the scope of protection of the present utility model.

[0033] In this utility model, when directions (up, down, left, right, front, and back) are described, it is only for the convenience of describing the technical solution of this utility model, and does not indicate or imply that the technical features referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation of this utility model.

[0034] In this utility model, "several" means one or more, "multiple" means two or more, "greater than," "less than," "exceeding," etc. are understood to exclude the stated number; "above," "below," "within," etc. are understood to include the stated number. In the description of this utility model, if "first" or "second" is used, it is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance or implicitly indicating the number of indicated technical features or the order of the indicated technical features.

[0035] In this utility model, unless otherwise explicitly defined, terms such as "set," "install," and "connect" should be interpreted broadly. For example, they can refer to a direct connection or an indirect connection through an intermediate medium; a fixed connection, a detachable connection, or an integrally formed connection; a mechanical connection, an electrical connection, or a connection capable of mutual communication; or the internal connection of two components or the interaction between two components. Those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model based on the specific content of the technical solution.

[0036] See Figures 1 to 4 An embodiment of this utility model provides a bracket rotation assembly 6, including a mounting base 1, a support member 2, a first connecting member 3, and an elastic telescopic assembly 4. The mounting base 1 is provided with a first limiting groove 121 and a second limiting groove 122, the depth direction of the first limiting groove 121 and the depth direction of the second limiting groove 122 forming an angle.

[0037] The support member 2 is hinged to the mounting base 1 via the first connector 3. The first end of the support member 2 engages with either the first limiting groove 121 or the second limiting groove 122, allowing switching between the first limiting groove 121 and the second limiting groove 122 to create different included angles between the support member 2 and the mounting base 1. In other words, in the working state, the first end of the support member 2 engages with the first limiting groove 121, or the first end of the support member 2 engages with the second limiting groove 122.

[0038] The first end of the support member 2 is provided with a sliding groove 21 extending in the left-right direction and a mounting groove 22 communicating with the sliding groove 21. (See also...) Figure 3The length direction of the sliding groove 21 is the same as the depth direction of the mounting groove 22, and perpendicular to the left and right direction. The first connecting member 3 passes through the sliding groove 21 in the left and right direction, and the elastic telescopic component 4 is disposed in the mounting groove 22 and abuts against the first connecting member 3.

[0039] When the support member 2 is pulled away from the first limiting groove 121 or the second limiting groove 122, the elastic telescopic component 4 is in a first telescopic state, and the first connecting member 3 is located in a first position in the sliding groove 21. When the support member 2 is released so that the first end of the support member 2 extends into the first limiting groove 121 or the second limiting groove 122, the elastic telescopic component 4 is in a second telescopic state, and the first connecting member 3 is located in a second position in the sliding groove 21. Specifically, when the first end of the support member 2 extends into the first limiting groove 121, a first angle is formed between the support member 2 and the mounting base 1; when the first end of the support member 2 extends into the second limiting groove 122, a second angle is formed between the support member 2 and the mounting base 1.

[0040] Specifically, when the support member 2 is rotated and extends from the front of the mounting base 1, it is necessary to first pull the support member 2 away from the corresponding first limiting groove 121 or second limiting groove 122. During the process of the support member 2 leaving the first limiting groove 121 or second limiting groove 122, the first connecting member 3 changes from the second position in the sliding groove 21 to the first position in the sliding groove 21, and the elastic telescopic component 4 is compressed or stretched, that is, in the first telescopic state. After the support member 2 is completely separated from the corresponding first limiting groove 121 or second limiting groove 122, the support member 2 can be rotated to reach the preset position of the mounting base 1, and the support member 2 is released. Under the action of the elastic restoring force of the elastic telescopic component 4, the support member 2 is pushed and extends into the corresponding second limiting groove 122 or first limiting groove 121. The first connecting member 3 changes from the first position in the sliding groove 21 to the second position in the sliding groove 21, and the elastic telescopic component 4 returns to its natural state or near-natural state, that is, in the second telescopic state.

[0041] Similarly, when the support member 2 is rotated and extends from above the mounting base 1, the working principle is the same as described above. The only difference is that the second limiting groove 122 of the support member 2 is switched to the first limiting groove 121 so that the support member 2 and the mounting base 1 form a first angle, or the first limiting groove 121 of the support member 2 is switched to the second limiting groove 122 so that the support member 2 and the mounting base 1 form a second angle. This will not be elaborated further here.

[0042] The bracket rotation assembly 6 of this technical solution, by setting a first limiting groove 121 and a second limiting groove 122 that cooperate with the first end of the support member 2, the sliding space provided by the sliding groove 21 and the elastic force of the elastic telescopic assembly 4, enables the support member 2 to stably switch between the first limiting groove 121 and the second limiting groove 122, thereby ensuring that the support member 2 can extend from the mounting base 1 from different angles and realize the function of rotating the support member 2. The operation is simple, flexible and highly stable.

[0043] In addition, by setting the elastic telescopic component 4, when the bracket rotation component 6 is in working state, that is, when the support 2 rotates to the preset position of the mounting base 1 and cooperates with the first limiting groove 121 or the second limiting groove 122, the elastic telescopic component 4 can absorb the vibration of the bracket, strengthen the vibration resistance, and help improve the stable support capacity of the bracket rotation component 6 during operation.

[0044] It is understandable that the mounting slot 22 can be located on the side of the sliding groove 21 closer to the first end, or it can be located on the side of the sliding groove 21 farther from the first end, depending on the actual usage requirements. See [link / reference] Figure 2 and Figure 3 In some embodiments, the mounting groove 22 is located on the side of the sliding groove 21 near the first end of the support member 2. The elastic telescopic assembly 4 includes an elastic member 41 and a limiting cylinder 42. One end of the elastic member 41 abuts against the mounting groove 22, and the other end of the elastic member 41 extends into and abuts against the limiting cylinder 42. The end of the limiting cylinder 42 opposite to the elastic member 41 abuts against the first connecting member 3. Installing the elastic member 41 in the limiting cylinder 42 serves as a limiting function, ensuring the stability of the support member 2 during rotation.

[0045] Furthermore, see Figure 2 and Figure 3 The support member 2 has a main body 23 and an end head 24. The end head 24 is located at one end of the main body 23. The support member 2 engages with the first limiting groove 121 or the second limiting groove 122 via the end head 24. The structure is simple and easy to operate. A sliding groove 21 is provided at one end of the main body 23 near the end head 24, and an installation groove 22 is provided at the end head 24. The installation groove 22 extends along the extension direction of the end head 24 and connects to the sliding groove 21. An installation groove 22 for installing the elastic telescopic component 4 is formed inside the end head 24. There is no need to set up other spaces for installing the elastic telescopic component 4 in other parts of the support member 2, which helps to reduce the overall volume of the support member 2 and makes it highly portable.

[0046] Furthermore, see Figure 3 and Figure 5The main body 23 has an inclined section 231 and a vertical section 232 connected to each other. The inclined section 231 has an end head 24 at the end away from the vertical section 232. The end of the vertical section 232 forms the second end of the support member 2 and has a connecting groove 25 extending in the left-right direction. The connecting groove 25 is used to connect two adjacent support members 2 through the second connecting member 5 to form a rotating bracket 7 in which the support members 2 can rotate synchronously.

[0047] See Figure 2 and Figure 3 In some embodiments, the sliding groove 21 is an oblong hole, and the width of the sliding groove 21 in the left-right direction is greater than the outer diameter of the end head 24. The limiting cylinder 42 includes a cylinder body 421 and an abutment part 422 connected to the cylinder body 421. The abutment part 422 is slidably installed in the sliding groove 21, and the first connecting member 3 abuts against the abutment part 422. The cylinder body 421 extends into the mounting groove 22 and is sleeved on the outside of the elastic member 41. The limiting cylinder 42 is installed in the sliding groove 21 through the abutment part 422 and the cylinder body 421 extends into the mounting groove 22 to stably install the limiting cylinder 42, avoid the limiting cylinder 42 from swaying left and right during movement, facilitate the stable operation of the elastic member 41, and improve the stability and reliability of the rotation process of the bracket rotating assembly 6.

[0048] Further, see Figure 3 The end face of the contact part 422 away from the cylinder 421 is an arc-shaped surface. The arc-shaped surface fits into the first connecting member 3, ensuring that the elastic extension force of the elastic member 41 can be transmitted in the first time, thereby improving the stability of the rotation of the support member 2.

[0049] In some embodiments, see Figures 1 to 4 The mounting base 1 has two protrusions 11 spaced apart in the left-right direction. A first limiting groove 121 and a second limiting groove 122 are provided between the two protrusions 11. The first end of the support member 2 is installed between the two protrusions 11. The first connecting member 3 passes through the sliding groove 21 and is correspondingly installed between the two protrusions 11. Installation is convenient and the structure has strong stability. Alternatively, the support member 2 can be hinged to the mounting base 1 by providing two protrusions to clamp it, or other structures can be used to achieve the hinge connection between the two; no limitation is made here.

[0050] Further, see Figure 4 The protrusion 11 has a through hole 111 along the left and right direction. The first connecting member 3 passes through the through hole 111, the sliding groove 21 and the through hole 111 of the other protrusion 11 in the left and right direction and is connected to the nut 112 to ensure that the support member 2 can be stably installed between the two protrusions 11.

[0051] See Figure 1 , Figure 4 and Figure 5In some embodiments, the mounting base 1 has a forward-extending extension 13 between the two protrusions 11, and a groove 14 is formed between the mounting base 1, the extension 13, and the two protrusions 11. An upper opening 141 and a front opening 142 communicating with the groove 14 are formed between the two protrusions 11. A first limiting groove 121 is provided in the extension 13, and a second limiting groove 122 is provided in the mounting base 1 portion behind the protrusions 11. When the first end of the support member 2 extends into the first limiting groove 121, the support member 2 extends out from the upper opening 141; when the first end of the support member 2 extends into the second limiting groove 122, the support member 2 extends out from the front opening 142, thereby enabling the support member 2 to extend out of the mounting base 1 from different angles.

[0052] Further, see Figure 3 The support member 2 has structures on its opposite sides that abut against the extension 13 and the mounting seat 1 on the rear side of the protrusion 11. In other words, the support member 2 has a first structure and a second structure on its opposite sides, the first structure abutting against the extension 13 and the second structure abutting against the mounting seat 1 on the rear side of the protrusion 11.

[0053] When the support member 2 is rotated and brought into contact with the extension 13, the support member 2 is released. Under the action of the elastic telescopic component 4, the support member 2 extends into the second limiting groove 122 and abuts against the extension 13 through the first structure, ensuring that the support member 2 can be stably supported on the extension 13. Similarly, when the support member 2 is rotated and brought into contact with the mounting seat 1 on the rear side of the protrusion 11, the support member 2 is released. Under the action of the elastic telescopic component 4, the support member 2 extends into the first limiting groove 121 and abuts against the mounting seat 1 on the rear side of the protrusion 11 through the second structure, ensuring that the support member 2 can be stably supported on the mounting seat 1 on the rear side of the protrusion 11.

[0054] It is understandable that the first structure can be configured into different bending structures according to the structure of the extension 13. Similarly, the second structure can be configured into different bending structures according to the structure of the mounting base 1 on the rear side of the abutting protrusion 11. For example, the bending angle of the bending structure and the composition of the bending structure (such as being composed of a circular arc surface and a straight surface, or being composed of two straight surfaces, etc.) can be adapted and are not limited here.

[0055] Further, see Figure 3 and Figure 4 The portion of the groove 14 between the first limiting groove 121 and the second limiting groove 122 is a transition arc surface 143, which matches the rotation trajectory of the support member 2, avoids interference with the support member 2, and ensures the stable operation of the rotation process.

[0056] See Figure 1 and Figure 5This utility model also provides a rotating bracket 7, including a second connector 5 and a bracket rotating assembly 6. Two sets of bracket rotating assemblies 6 are provided, and the two sets of bracket rotating assemblies 6 are spaced apart in the left-right direction. The second connector 5 is located between the second ends of the support members 2 of the two sets of bracket rotating assemblies 6. In other words, both ends of the second connector 5 extend into the connecting grooves 25 of the support members 2 of the two sets of bracket rotating assemblies 6, realizing the function of synchronous rotation of the support members 2 of the two sets of bracket rotating assemblies 6.

[0057] See Figure 6 This utility model also provides a unicycle 8, including a frame 81, wheels 82, and a rotating support 7. The wheels 82 are rotatably disposed below the frame 81, and the rotating support 7 is disposed in front of and / or behind the frame 81, with the support rotation assembly 6 distributed on both sides of the wheels 82. When the first end of the support member 2 extends into the first limiting groove 121, the rotating support 7 abuts against the frame 81 in a retracted state. When the first end of the support member 2 extends into the second limiting groove 122, the rotating support 7 forms a predetermined angle with the frame 81 in an unfolded state.

[0058] When the rotating bracket 7 is in the unfolded state, it can be used as a parking bracket for the unicycle 8, or as a push rod or pull rod for the unicycle 8, meeting different needs of users in actual use and demonstrating strong practicality. When the rotating bracket 7 is not needed, it can be stored away to avoid taking up space and affecting riding.

[0059] In the description of this specification, references to terms such as "example," "embodiment," or "some embodiments" indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0060] Of course, the present invention is not limited to the above-described embodiments. Those skilled in the art can make equivalent modifications or substitutions without departing from the spirit of the present invention. All such equivalent modifications or substitutions are included within the scope defined by the claims of this application.

Claims

1. A bracket rotation assembly, characterized in that, include: The mounting base is provided with a first limiting groove and a second limiting groove; A support member is hinged to the mounting base via a first connector. The first end of the support member engages with the first limiting groove or the second limiting groove. The first end of the support member is provided with a sliding groove that extends in the left-right direction and a mounting groove that communicates with the sliding groove. The first connector passes through the sliding groove in the left-right direction. An elastic telescopic component is disposed within the mounting groove and abuts against the first connector; When the first end of the support extends into the first limiting groove, a first angle is formed between the support and the mounting base; when the first end of the support extends into the second limiting groove, a second angle is formed between the support and the mounting base.

2. The bracket rotation assembly according to claim 1, characterized in that, The mounting groove is located on the side of the sliding groove near the first end of the support member. The elastic telescopic assembly includes an elastic member and a limiting cylinder. One end of the elastic member abuts against the mounting groove, and the other end of the elastic member extends into the limiting cylinder and abuts against the limiting cylinder. The end of the limiting cylinder opposite to the elastic member abuts against the first connecting member.

3. The bracket rotation assembly according to claim 2, characterized in that, The support member has a main body and an end head. The end head is located at one end of the main body. The support member is engaged with the first limiting groove or the second limiting groove through the end head. The main body is provided with the sliding groove at one end near the end head. The end head is provided with the mounting groove. The mounting groove is connected to the sliding groove along the extending direction of the end head.

4. The bracket rotation assembly according to claim 3, characterized in that, The main body has an inclined section and a vertical section connected to each other. The inclined section has an end head at one end away from the vertical section. The end of the vertical section forms the second end of the support member and has a connecting groove extending in the left-right direction.

5. The bracket rotation assembly according to claim 3, characterized in that, The sliding groove is an oblong hole, and the width of the sliding groove in the left-right direction is greater than the outer diameter of the end head. The limiting cylinder includes a cylinder body and an abutment part connected to the cylinder body. The abutment part is slidably installed in the sliding groove. The first connecting member abuts against the abutment part. The cylinder body extends into the mounting groove and is sleeved on the outside of the elastic member.

6. The bracket rotation assembly according to claim 1, characterized in that, The mounting base has two protrusions spaced apart in the left-right direction. The mounting base has a first limiting groove and a second limiting groove between the two protrusions. The first end of the support member is installed between the two protrusions. The first connecting member passes through the sliding groove and is installed between the two protrusions.

7. The bracket rotation assembly according to claim 6, characterized in that, The mounting base has a forward-extending extension between the two protrusions. A groove is formed between the mounting base, the extension, and the two protrusions. An upper opening and a front opening communicating with the groove are formed between the two protrusions. A first limiting groove is provided in the extension, and a second limiting groove is provided in the mounting base portion behind the protrusion. When the first end of the support member extends into the first limiting groove, the support member extends out from the upper opening; when the first end of the support member extends into the second limiting groove, the support member extends out from the front opening.

8. The bracket rotation assembly according to claim 7, characterized in that, The support member has structures on its opposite sides that abut against the extension and the mounting base on the rear side of the protrusion, and the groove between the first limiting groove and the second limiting groove is a transition arc surface.

9. A rotating bracket, characterized in that, The device includes a second connector and a bracket rotation assembly as described in any one of claims 1 to 8, wherein the bracket rotation assembly is provided in two sets and the two sets of bracket rotation assemblies are spaced apart in the left-right direction, and the second connector is disposed between the second ends of the support member of the two sets of bracket rotation assemblies.

10. A wheelbarrow, characterized in that, The device includes a frame, wheels, and a rotating bracket as described in claim 9. The wheels are rotatably disposed below the frame, and the rotating bracket is disposed in front of and / or behind the frame. The bracket rotating components are distributed on both sides of the wheels. When the first end of the support member extends into the first limiting groove, the rotating bracket abuts against the frame to be in a retracted state. When the first end of the support member extends into the second limiting groove, the rotating bracket forms a predetermined angle with the frame to be in an extended state.

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