Construction toy

Abstract

The utility model relates to the technical field of toys, and specifically discloses a kind of assembling toys, the assembling toy includes: main body, joint assembly and limb;The joint assembly includes moving part and rotating part, the moving part is movably connected the main body along first direction, and the rotating part is rotatably connected the moving part;The limb is connected with the rotating part, and the limb is arranged in the side of the main body along the first direction.According to the assembling toy of the utility model embodiment, joint assembly includes moving part and rotating part, moving part can drive rotating part and limb relative main body along first direction moves, while rotating part can drive limb relative main body rotation, so that limb has higher activity freedom, enriches the play and simulation degree of assembling toy, improves the interestingness of assembling toy.

Description

Technical Field

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

[0002] Assembly toys enhance children's hands-on skills through edutainment. Among doll-shaped toys, the integration of hands-on skills with character creation increases the fun of assembly toys. However, in related technologies, the operability and range of motion of doll toys are still not realistic enough, which restricts the movement of assembly toys and results in a poor user experience. Utility Model Content

[0003] This invention aims to at least partially solve one of the technical problems in related technologies. Therefore, the purpose of this invention is to provide an assembly toy that allows for greater freedom of movement of limbs.

[0004] An assembly toy according to an embodiment of the present invention includes: a main body, a joint assembly, and limbs; the joint assembly includes a movable part and a rotating part, the movable part being movably connected to the main body along a first direction, and the rotating part being rotatably connected to the movable part; the limbs are connected to the rotating part, and the limbs are disposed on the side of the main body along the first direction.

[0005] According to the embodiments of the present invention, the joint component of the assembled toy includes a moving part and a rotating part. The moving part can drive the rotating part and the limb to move relative to the main body in a first direction, while the rotating part can drive the limb to rotate relative to the main body, so that the limb has a higher degree of freedom of movement and enhances the fun of the assembled toy.

[0006] In addition, the assembly toy according to the above embodiments of this utility model may also have the following additional technical features: In some embodiments, the movable part includes a slider and a hinge connecting the slider, the slider being slidably disposed within the body along the first direction, the body having an opening opposite to the hinge, and at least a portion of the rotating part being disposed outside the body and rotatably connected to the hinge.

[0007] In some embodiments, the slider extends along a second direction, the main body is provided with a first groove and a second groove, the first groove and the second groove are distributed along the second direction, and the two ends of the slider along the second direction are slidably disposed in the first groove and the second groove respectively along the first direction, the second direction being perpendicular to the first direction.

[0008] In some embodiments, the slider has a first guide protrusion and a second guide protrusion distributed along the second direction. The first guide protrusion and the second guide protrusion extend along the first direction and are disposed between the sidewall of the first groove and the sidewall of the second groove, and the first guide protrusion and the second guide protrusion are slidable along the first direction.

[0009] In some embodiments, the slider is provided with a mounting hole, the hinge is provided with a mounting shaft, the mounting shaft passes through the mounting hole along a third direction, one of the outer side of the mounting shaft and the inner side of the mounting hole is provided with an annular groove, and the other is provided with a positioning protrusion, the positioning protrusion is disengaged to engage with the annular groove to restrict the mounting shaft from disengaging from the mounting hole, and the third direction is perpendicular to the first direction.

[0010] In some embodiments, the displacement range of the joint assembly moving along the first direction is not less than 2 mm and not more than 4 mm.

[0011] In some embodiments, the rotating part includes a first connector and a second connector arranged at intervals along a first direction, the first connector being rotatably connected to the moving part, and the limb being rotatably connected to the second connector.

[0012] In some embodiments, the rotating part is rotatably connected to the moving part about a first rotation axis, and the limb is rotatably connected to the moving part about a second rotation axis, the second rotation axis extending in a direction perpendicular to the first rotation axis.

[0013] In some embodiments, the rotating part further includes a third connector connected to the second connector, and the assembly toy further includes a shoulder armor connected to the third connector.

[0014] In some embodiments, the limb includes a first branch, a second branch, and a joint connector. The first branch is connected to the rotating part, and the joint connector is connected between the first branch and the second branch. The joint connector includes a first hinge portion and a second hinge portion, which are arranged at intervals. The first hinge portion is rotatably connected to the first branch, and the second hinge portion is rotatably connected to the second branch. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of an assembly toy according to an embodiment of the present invention.

[0016] Figure 2 This is an exploded view of the assembled toy according to an embodiment of the present invention.

[0017] Figure 3 This is a partial schematic diagram of the assembled toy according to an embodiment of the present utility model.

[0018] Figure 4 This is a partial cross-sectional schematic diagram of the assembled toy according to an embodiment of the present utility model.

[0019] Figure 5 This is a cross-sectional schematic diagram of the assembled toy according to an embodiment of the present utility model.

[0020] Figure 6 This is a schematic diagram of the limbs of the assembled toy according to an embodiment of this utility model.

[0021] Figure 7 This is an exploded schematic diagram of the limbs of the assembled toy according to an embodiment of this utility model.

[0022] Figure label: Assembly toy 100, main body 10, opening 11, first slide 121, second slide 122, joint assembly 20, moving part 21, slider 211, first guide protrusion 2111, second guide protrusion 2112, mounting hole 2113, positioning protrusion 2114, hinge 212, mounting shaft 2121, annular groove 2122, rotating part 22, first joint 221, second joint 222, third joint 223, limb 30, first support 31, second support 32, joint connector 33, first hinge 331, second hinge 332, shoulder armor 40. Detailed Implementation

[0023] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model.

[0024] Combination Figure 1 and Figure 2 The assembly toy 100 according to an embodiment of the present utility model includes: a main body 10, joint components 20, and limbs 30. Exemplarily, the main body 10, joint components 20, and limbs 30 may include multiple parts, and the multiple parts are spliced, combined, etc. to realize the toy model assembly.

[0025] Combination Figure 2 The joint assembly 20 includes a movable part 21 and a rotating part 22. The movable part 21 is movably connected to the main body 10 along a first direction, which is the AA direction shown in the figure. The rotating part 22 is rotatably connected to the movable part 21. The limb 30 is connected to the rotating part 22 and is located on the side of the main body 10 along the first direction.

[0026] Specifically, the moving part 21 can drive the rotating part 22 and the limb 30 to move relative to the main body 10 along a first direction. That is, the joint assembly 20 can extend and retract relative to the main body 10 along the first direction, while the rotating part 22 can drive the limb 30 to rotate relative to the main body 10, giving the limb 30 a higher degree of freedom of movement. For example, the assembly toy 100 can be a humanoid toy, the main body 10 can be the chest of the body, the limb 30 can be the arm, and the joint assembly 20 can be the shoulder joint. By setting the moving part 21 and the rotating part 22, the shoulder joint can move relative to the chest along the first direction and can rotate relative to the chest, which facilitates flexible movement of the arm through the shoulder joint. For example, when it is necessary to rotate the arm, the moving part 21 can drive the limb 30 to move away from the main body 10 along the first direction, avoiding interference between the arm and the main body 10 during the rotation of the shoulder joint. When it is not necessary to rotate the arm, the moving part 21 can drive the limb 30 to move towards the main body 10 along the first direction, avoiding exposure of the shoulder joint structure and making the structure of the assembly toy 100 more compact, thus improving the simulation of the assembly toy 100.

[0027] According to the embodiment of the present utility model, the assembly toy 100, by setting the joint component 20 as a structure that is retractable relative to the main body 10, can drive the limb 30 to move relative to the main body 10 in a first direction through the moving part 21, thereby avoiding interference between the limb 30 and the main body 10 during rotation, improving the freedom of movement of the limb 30, enriching the play and simulation of the assembly toy 100, and enhancing the fun of the assembly toy 100.

[0028] The movable part 21 is movably connected to the main body 10 along a first direction. For example, the movable part 21 and the main body 10 can be a mating structure through a slider 211 and a groove; or, the movable part 21 and the main body 10 can be a mating structure through a rack and pinion; or, the main body 10 can include a sleeve, and the movable part 21 can include a connecting rod, which is slidably disposed inside the sleeve.

[0029] Furthermore, the limbs 30 include two that can be distributed along a first direction. For example, the first direction can be a left-right direction. The limbs 30 include a left arm connected to the left side of the main body 10 and a right arm connected to the right side of the main body 10. The left arm is connected to the left side of the main body 10 via a joint assembly 20, and the right arm is connected to the right side of the main body 10 via a joint assembly 20, thereby improving the realism of the assembled toy 100.

[0030] Combination Figure 2In some embodiments of this utility model, the moving part 21 includes a slider 211 and a hinge 212 connecting the slider 211. The slider 211 is slidably disposed within the main body 10 along a first direction. The main body 10 has an opening 11 opposite to the hinge 212. At least a portion of the rotating part 22 is disposed outside the main body 10 and rotatably connected to the hinge 212. Specifically, the moving part 21 includes a slider 211 and a hinge 212. The slider 211 is disposed within the main body 10. When the slider 211 drives the rotating part 22 to move relative to the main body 10 along the first direction, the slider 211 can be hidden within the main body 10, avoiding exposure of the connecting structure and making the structure of the assembly toy 100 more compact. The hinge 212 can serve as a structure connecting the slider 211 and the rotating part 22. The slider 211 drives the hinge 212 to move and drives the rotating part 22 to move. The rotating part 22 can rotate relative to the hinge 212, thereby enabling the movement and rotation of the limb 30, avoiding the exposure of the joint structure of the limb 30, and making the movement of the limb 30 more flexible.

[0031] The main body 10 has an opening 11, which is opposite to the hinge 212. The rotating part 22 can pass through the opening 11, that is, a part of the rotating part 22 is located on the hinge 212 and rotatably connected to the hinge 212, and the other part of the rotating part 22 is located outside the opening 11 and is configured to connect to the limb 30. For example, when it is necessary to rotate the limb 30, the limb 30 can be stretched away from the main body 10 in the first direction. At this time, the moving part 21 can be used to drive the limb 30 to extend outward, and then the limb 30 can be rotated to improve the degree of freedom of movement of the limb 30. When it is not necessary to rotate the limb 30, the limb 30 can be retracted towards the main body 10 to avoid the joint component 20 being exposed and to improve the simulation of the assembled toy 100.

[0032] Combination Figure 3 In some embodiments of this utility model, the slider 211 extends along a second direction, which is the BB direction shown in the figure. The main body 10 is provided with a first slide groove 121 and a second slide groove 122. The first slide groove 121 and the second slide groove 122 are distributed along the second direction. The two ends of the slider 211 along the second direction are slidably disposed in the first slide groove 121 and the second slide groove 122 along the first direction, respectively. The second direction is perpendicular to the first direction. By setting the first slide groove 121 and the second slide groove 122 to cooperate with the two ends of the slider 211, and the extension direction of the slider 211 is perpendicular to the movement direction, the movement of the slider 211 along the first direction can be restricted stably, and the load can be evenly distributed, so that the slider 211 can stably drive the moving part 21 and the limb 30 to move.

[0033] For example, the second direction can be the front-back direction of the assembly toy 100. The main body 10 may include a first half and a second half arranged in the front-back direction. The first half and the second half can be assembled together and define a receiving space. At least a portion of the moving part 21 is provided in the receiving space. The first slide 121 may be provided in the first half and the second slide 122 may be provided in the second half.

[0034] Combination Figure 3 and Figure 4 In some embodiments of this utility model, the slider 211 is provided with a first guide protrusion 2111 and a second guide protrusion 2112 distributed along a second direction. The first guide protrusion 2111 and the second guide protrusion 2112 extend along a first direction and are disposed between the sidewalls of the first slide groove 121 and the sidewalls of the second slide groove 122. The first guide protrusion 2111 and the second guide protrusion 2112 are slidable along the first direction. The first guide protrusion 2111 cooperates with the first slide groove 121, and the second guide protrusion 2112 cooperates with the second slide groove 122. This can further guide and limit the movement of the slider 211, so that the slider 211 slides stably along the first direction, and avoids the slider 211 from falling out of the slide groove when the limb 30 is rotated or when the assembled toy 100 is subjected to external force, thereby improving the stability and rigidity of the sliding movement.

[0035] Combination Figure 3 and Figure 4 In some embodiments of this utility model, the slider 211 is provided with a mounting hole 2113, and the hinge 212 is provided with a mounting shaft 2121. The mounting shaft 2121 passes through the mounting hole 2113 along a third direction, which is the CC direction shown in the figure. One of the outer surface of the mounting shaft 2121 and the inner surface of the mounting hole 2113 is provided with an annular groove 2122, and the other is provided with a positioning protrusion 2114. The positioning protrusion 2114 is disengaged and engages with the annular groove 2122 to restrict the mounting shaft 2121 from disengaging from the mounting hole 2113. For example, the outer surface of the mounting shaft 2121 may be provided with an annular groove 2122, and the inner surface of the mounting hole 2113 may be provided with a positioning protrusion 2114; or, the outer surface of the mounting shaft 2121 may be provided with an annular groove 2122. The surface may be provided with a positioning protrusion 2114, and the inner side of the mounting hole 2113 may be provided with an annular groove 2122. By setting the annular groove 2122 to cooperate with the positioning protrusion 2114, the connection stability between the slider 211 and the hinge 212 is improved, and the hinge 212 and the slider 211 are prevented from separating when the limb 30 is moved. At the same time, the positioning protrusion 2114 can be dislodged from the annular groove 2122 to facilitate the assembly and disassembly of the assembly toy 100 and enrich the play of the assembly toy 100.

[0036] Furthermore, the third direction is perpendicular to the first direction, that is, the mounting direction of the hinge 212 is perpendicular to the moving direction of the slider 211, thereby improving the connection rigidity between the hinge 212 and the slider 211.

[0037] In some embodiments of this utility model, the displacement range of the joint component 20 along the first direction is not less than 2 mm and not more than 4 mm. Taking the assembly toy 100 as a 6-inch doll as an example, by setting the range of movement of the joint component 20 along the first direction to this range, on the one hand, it is convenient for the limb 30 to move relative to the main body 10 through the joint component 20, thereby improving the freedom of movement of the limb 30. On the other hand, it avoids the joint component 20 from moving too much, causing the joint component 20 to be exposed too much, and improves the overall structural compactness of the assembly toy 100, thereby improving the simulation degree of the assembly toy 100.

[0038] For example, the displacement range of the joint assembly 20 along the first direction can be 2mm, 3mm, 4mm, etc.

[0039] Combination Figure 2 and Figure 5 In some embodiments of this utility model, the rotating part 22 includes a first connector 221 and a second connector 222 arranged at intervals along a first direction. The first connector 221 is rotatably connected to the moving part 21, and the limb 30 is rotatably connected to the second connector 222. The first connector 221 can be used to connect the rotating part 22 to the moving part 21, and the second connector 222 can be used to connect the limb 30 to the rotating part 22, thereby facilitating the translation of the limb 30 along the first direction by the moving part 21, and at the same time facilitating the rotation of the limb 30 relative to the main body 10, which can enrich the flexibility of the limb 30's movement and enrich the playability of the assembly toy 100.

[0040] For example, the first connector 221 may be a ball head, and the moving part 21 may include a slider 211 and a hinge 212 that can connect to the slider 211. The hinge 212 includes a ball socket, and the ball head is rotatably disposed in the ball socket. The second connector 222 may include a through hole, and the limb 30 may include a connecting post that rotatably passes through the through hole.

[0041] Furthermore, the rotating part 22 is rotatably connected to the moving part 21 about a first rotation axis, and the limb 30 is rotatably connected to the rotating part 22 about a second rotation axis, the second rotation axis extending in a direction perpendicular to the first rotation axis. For example, the first rotation axis can extend in a left-right direction, facilitating the rotation of the limb 30 forward or backward via the rotating part 22. In addition, the second rotation axis extends in a direction perpendicular to the first rotation axis. During the rotation of the limb 30 around the first rotation axis, the second rotation axis can dynamically change, and it always extends in a direction perpendicular to the first rotation axis, making the movement of the limb 30 more human-like, thereby enhancing the realism of the assembly toy 100 and increasing its fun factor.

[0042] For example, the assembly toy 100 can be a humanoid toy, and the limb 30 is the arm of the assembly toy 100. In its natural state, the arm extends in the vertical direction and its upper end is connected to one side of the main body 10 in the left and right direction. The arm can swing in the front and back direction and can swing in the left and right direction at the same time.

[0043] Combination Figure 5 In some embodiments of this invention, the rotating part 22 further includes a third connector 223, which connects to the second connector 222. The assembled toy 100 also includes a shoulder armor 40, which connects to the third connector 223. By providing the third connector 223, the rotating part 22 can simultaneously drive the shoulder armor 40 to rotate when it rotates. In other words, the rotating part 22 can simultaneously drive the limb 30 and the shoulder armor 40 to rotate, thereby improving the realism of the assembled toy 100. Furthermore, by providing three connectors in the rotating part 22, the structure of the joint assembly 20 is simplified.

[0044] Combination Figure 6 and Figure 7 In some embodiments of this utility model, the limb 30 includes a first branch 31, a second branch 32, and a joint connector 33. The first branch 31 is connected to the rotating part 22, and the joint connector 33 is connected between the first branch 31 and the second branch 32. The joint connector 33 includes a first hinge portion 331 and a second hinge portion 332, which are arranged at intervals. The first hinge portion 331 is rotatably connected to the first branch 31, and the second hinge portion 332 is rotatably connected to the second branch 32. For example, the first branch 31 can be the upper arm, the second branch 32 can be the forearm, and the joint connector 33 can serve as a power hub for the movement of the forearm, facilitating the limb 30 to perform flexion and extension movements. By providing the first hinge portion 331 and the second hinge portion 332 on the joint connector 33, it is easier for the limb 30 to perform different fine movements, and the exposure of the joint connector 33 during flexion and extension of the limb 30 is reduced, thereby improving the realism of the assembled toy 100.

[0045] For example, limb 30 can be the arm of the assembly toy 100. When the assembly toy 100 bends its arm, the first branch 31 can be relatively fixed. First, rotate the joint connector 33. The joint connector 33 rotates relative to the first branch 31 around the first hinge 331, and drives the second branch 32 to rotate at a certain angle. Then rotate the second branch 32. The second branch 32 can rotate relative to the joint connector 33 around the second hinge 332, so that the second branch 32 rotates relative to the joint connector 33 at a certain angle. Compared with a structure that only sets one hinge point, when the second branch 32 rotates relative to the first branch 31 at the same angle, the joint connector 33 rotates less, which can reduce the exposure of the joint connector 33 and thus improve the simulation of the educational toy.

[0046] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "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.

[0047] 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.

[0048] 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.

[0049] 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.

[0050] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., 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, the 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. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0051] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A type of assembly toy (100), characterized in that, include: Main body (10); A joint assembly (20) includes a movable part (21) and a rotating part (22), wherein the movable part (21) is movably connected to the main body (10) along a first direction, and the rotating part (22) is rotatably connected to the movable part (21); Limb (30), the limb (30) is connected to the rotating part (22), and the limb (30) is disposed on the side of the main body (10) along the first direction.

2. The assembly toy (100) according to claim 1, characterized in that, The moving part (21) includes a slider (211) and a hinge (212) connecting the slider (211). The slider (211) is slidably disposed in the main body (10) along the first direction. The main body (10) has an opening (11) opposite to the hinge (212). At least a portion of the rotating part (22) is disposed outside the main body (10) and is rotatably connected to the hinge (212).

3. The assembly toy (100) according to claim 2, characterized in that, The slider (211) extends along the second direction, and the main body (10) is provided with a first groove (121) and a second groove (122). The first groove (121) and the second groove (122) are distributed along the second direction. The two ends of the slider (211) along the second direction are slidably disposed in the first groove (121) and the second groove (122) respectively along the first direction. The second direction is perpendicular to the first direction.

4. The assembly toy (100) according to claim 3, characterized in that, The slider (211) is provided with a first guide protrusion (2111) and a second guide protrusion (2112) distributed along the second direction. The first guide protrusion (2111) and the second guide protrusion (2112) extend along the first direction. The first guide protrusion (2111) and the second guide protrusion (2112) are disposed between the side wall of the first slide groove (121) and the side wall of the second slide groove (122), and the first guide protrusion (2111) and the second guide protrusion (2112) are slidable along the first direction.

5. The assembly toy (100) according to claim 2, characterized in that, The slider (211) is provided with a mounting hole (2113), and the hinge (212) is provided with a mounting shaft (2121). The mounting shaft (2121) passes through the mounting hole (2113) along a third direction. One of the outer side of the mounting shaft (2121) and the inner side of the mounting hole (2113) is provided with an annular groove (2122), and the other is provided with a positioning protrusion (2114). The positioning protrusion (2114) is detachably engaged with the annular groove (2122) to restrict the mounting shaft (2121) from disengaging from the mounting hole (2113). The third direction is perpendicular to the first direction.

6. The assembly toy (100) according to claim 1, characterized in that, The displacement range of the joint assembly (20) moving along the first direction is not less than 2 mm and not more than 4 mm.

7. The assembly toy (100) according to claim 1, characterized in that, The rotating part (22) includes a first connector (221) and a second connector (222) arranged at intervals along a first direction. The first connector (221) is rotatably connected to the moving part (21), and the limb (30) is rotatably connected to the second connector (222).

8. The assembly toy (100) according to claim 7, characterized in that, The rotating part (22) is rotatably connected to the moving part (21) about a first rotation axis, and the limb (30) is rotatably connected to the moving part (21) about a second rotation axis, the second rotation axis extending in a direction perpendicular to the first rotation axis.

9. The assembly toy (100) according to claim 7, characterized in that, The rotating part (22) also includes a third connector (223) which is connected to the second connector (222). The assembled toy (100) also includes a shoulder armor (40) which is connected to the third connector (223).

10. The assembly toy (100) according to claim 1, characterized in that, The limb (30) includes a first branch (31), a second branch (32), and a joint connector (33). The first branch (31) is connected to the rotating part (22). The joint connector (33) is connected between the first branch (31) and the second branch (32). The joint connector (33) includes a first hinge (331) and a second hinge (332). The first hinge (331) and the second hinge (332) are arranged at intervals. The first hinge (331) is rotatably connected to the first branch (31), and the second hinge (332) is rotatably connected to the second branch (32).

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