Wire harness protection device

Abstract

The utility model provides a wire harness protection device, which comprises a plurality of shells which are rotatably connected in sequence, and each shell comprises a peripheral wall which defines an accommodating space for accommodating a wire harness; the first rotary connecting part is arranged at one end of the peripheral wall; the second rotary connecting part and the first rotary connecting part are correspondingly arranged at the other end of the peripheral wall; wherein the first rotary connecting part of one shell can be connected with the second rotary connecting part of the other adjacent shell, so that the two adjacent shells are rotatably connected. The wire harness protection device not only can adapt to complex wiring paths and variable spatial layout in a vehicle, but also can play an effective role in protecting the wire harness.

Description

TECHNICAL FIELD

[0001] The utility model relates to a wire harness protection device, in particular to a wire harness protection device for protecting wire harness in a vehicle. BACKGROUND

[0002] With the continuous development of vehicle industry, the electronic equipment and electrical system inside the vehicle are increasingly complex, and the number and length of wire harnesses, as key components connecting various parts, are also increasing. Reasonable collection and fixation of wire harnesses have important influence on assembly efficiency of the vehicle, utilization of internal space and protection of the wire harnesses themselves.

[0003] At present, the collection methods of wire harnesses inside the vehicle mainly include traditional methods such as fixed wire slot and binding belt. Although the fixed wire slot can realize wire harness arrangement to a certain extent, its shape and size are pre-set, and it is difficult to match the complex wiring path and variable space layout inside the vehicle. When the vehicle wire harness layout is adjusted or the wire harnesss of different vehicle models have different trends, the fixed wire slot cannot meet the use requirements and needs to be redesigned and installed, which undoubtedly increases the cost and workload. Although the binding belt has a certain flexibility, it cannot cover the wire harness, and the protection effect on the wire harness is limited in actual application.

[0004] Therefore, how to overcome the aforementioned shortcomings of the prior art is a technical problem that the current society urgently wants to solve. CONTENT OF THE UTILITY MODEL

[0005] The utility model aims at providing a wire harness collection device which can adapt to the complex wiring path and variable space layout inside the vehicle and can effectively protect the wire harness.

[0006] According to the wire harness protection device provided by the utility model, a plurality of shell bodies are connected in sequence and can rotate, wherein each shell body comprises a peripheral wall defining a receiving space for receiving a wire harness, a first rotating connection part provided at one end of the peripheral wall, and a second rotating connection part provided at the other end of the peripheral wall corresponding to the first rotating connection part; the first rotating connection part of one shell body can be connected with the second rotating connection part of an adjacent other shell body, and thus the two adjacent shell bodies can be connected rotatably.

[0007] In some example embodiments, the peripheral wall comprises a first portion and a second portion, each of which is a part of the peripheral direction of the peripheral wall and can be assembled together to form the complete peripheral wall, thereby defining the receiving space; the shell further comprises: a first engaging portion arranged on the first portion; a second engaging portion arranged on the second portion; wherein, after the first engaging portion is engaged with the second engaging portion, the first portion and the second portion can be assembled together to form the complete peripheral wall.

[0008] In some example embodiments, the first engaging portion is a clamping groove, which comprises: two side plates arranged at intervals on the edge of the outer surface of the first portion; a connecting plate connecting the two side plates and defining a plug-in channel with the two side plates; the second engaging portion is a clamping block arranged corresponding to the clamping groove, which comprises: a plug-in plate connected to the edge of the outer surface of the second portion at one end and capable of being inserted into the plug-in channel; a wedge-shaped block arranged at the other end of the plug-in plate, and the wedge-shaped block forms a pressure inclined surface away from the second portion and a stop surface close to the second portion.

[0009] In some example embodiments, the other end of the plug-in plate further forms a pressing surface, which is further away from the second portion relative to the wedge-shaped block.

[0010] In some example embodiments, the first portion and the second portion each occupy half of the peripheral direction of the peripheral wall; the first portion is provided with the clamping groove on both sides, and the two clamping grooves are symmetrically arranged on the first portion; the second portion is provided with the clamping block on both sides, and the two clamping blocks are symmetrically arranged on the second portion.

[0011] In some example embodiments, the inner surface of the peripheral wall forms a convex rib, which can press the wire harness after the wire harness is received into the receiving space.

[0012] In some example embodiments, the first rotating connecting portion comprises: an extension plate connected to the peripheral wall at one end and extending along the axial direction of the peripheral wall; a rotating hole formed at the other end of the extension plate and having a gap; the second rotating connecting portion comprises: a rotating shaft connected to the peripheral wall at one end; a baffle plate arranged at the other end of the rotating shaft and having a diameter greater than the radial dimension of the rotating hole.

[0013] In some example embodiments, the diameter of the rotating shaft is less than or equal to the diameter of the rotating hole, but greater than the size of the gap.

[0014] In some example embodiments, the first rotation connecting part and the second rotation connecting part are both provided as two, and each of the two first rotation connecting parts is provided with a second rotation connecting part on opposite sides of the peripheral wall.

[0015] In some example embodiments, the first rotation connecting part comprises a first extension rod having one end connected to the peripheral wall and extending along the axial direction of the peripheral wall, and a ball socket connected to the other end of the first extension rod and having an open spherical chamber; and the second rotation connecting part comprises a second extension rod having one end connected to the peripheral wall and extending away from the peripheral wall, and a ball head provided at the other end of the second extension rod.

[0016] In some example embodiments, the second extension rod extends radially outwardly along the peripheral wall, and the opening of the spherical chamber faces the radially inner side of the peripheral wall.

[0017] In some example embodiments, the second extension rod extends axially along the peripheral wall, and the opening of the spherical chamber faces the distal end of the axial direction of the peripheral wall.

[0018] In some example embodiments, the first rotation connecting part and the second rotation connecting part are both provided as one and are provided on the same side of the peripheral wall.

[0019] According to the wire harness protection device of the present application, a plurality of housings are sequentially rotationally connected, so that the wire harness protection device as a whole has a certain flexibility, thereby being capable of being bent to adapt to the environment inside the vehicle and to adapt to the complex wiring path and variable space layout inside the vehicle. Meanwhile, each housing comprises a defined accommodation space, and the wire harness inside the vehicle can be accommodated in the accommodation space, that is, the peripheral wall can be wrapped around the wire harness, so as to not only play a role of collecting and fixing the wire harness, but also protect the wire harness. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 is a structural schematic view of the wire harness protection device of the present application;

[0021] Figure 2 is a structural schematic view of the housing;

[0022] Figure 3 is a schematic view of the housing observed along the axial direction of the housing;

[0023] Figure 4 is a structural schematic view of the clamping groove;

[0024] Figure 5 is a structural schematic view of the clamping groove from another perspective;

[0025] Figure 6 is a structural diagram of the card block from another perspective;

[0026] Figure 7 is a structural diagram of the card block from another perspective;

[0027] Figure 8 is a structural diagram of the first rotation connecting part in one embodiment;

[0028] Figure 9 is a structural diagram of the second rotation connecting part in one embodiment;

[0029] Figure 10 is a structural diagram of the first rotation connecting part and the second rotation connecting part in another embodiment;

[0030] Figure 10a is a structural diagram of Figure 10 is a structural diagram of the embodiment from the Y direction;

[0031] Figure 11 is a structural diagram of the first rotation connecting part in yet another embodiment;

[0032] Figure 12 is a structural diagram of the second rotation connecting part in yet another embodiment;

[0033] Explanation of Reference Signs

[0034] Wire harness protection device 1

[0035] Housing 2

[0036] Peripheral wall 20

[0037] First portion 201

[0038] Second portion 202

[0039] First rotation connecting part 21

[0040] Extension plate 211

[0041] Rotation hole 212

[0042] Notch 212'

[0043] First extension rod 211a

[0044] Ball socket 212a

[0045] Spherical cavity 212a'

[0046] Opening 212a"

[0047] Second rotation connecting part 22

[0048] Rotating shaft 221

[0049] Baffle 222

[0050] Second extension rod 221a

[0051] Ball head 222a

[0052] Clamping groove 23

[0053] Side plate 231

[0054] Connecting plate 232

[0055] Clamping block 24

[0056] Plug-in board 241

[0057] Wedge block 242

[0058] Pressure inclined surface 242a

[0059] Stop surface 242b

[0060] Pressing surface 243

[0061] Convex rib 25

[0062] Accommodation space SP1

[0063] Plug-in channel SP2. DETAILED DESCRIPTION

[0064] Reference will now be made in detail to various embodiments of the present application, examples of which are illustrated in the accompanying drawings and described below. While the present application will be described in conjunction with the exemplary embodiments, it will be understood that the present application is not limited to the exemplary embodiments. Rather, the present application is intended to cover all alternatives, modifications, and equivalents of the exemplary embodiments that are included within the spirit and scope of the present application as defined by the appended claims.

[0065] For the convenience of explanation and precise definition of the appended claims, the terms "inner surface", "inner side", "outer surface", "outer" are used to describe the features of the exemplary embodiments with reference to the position of the features shown in the drawings.

[0066] The following description is provided in relation to the drawings Figures 1 to 12 The harness collecting device provided by the present application is described in detail.

[0067] Figure 1 It is a structural schematic view of the harness protection device of the present application.

[0068] Referring to Figure 1The wire harness protection device 1 comprises a plurality of housings 2 which are sequentially and rotatably connected, so that the wire harness protection device 1 as a whole has a certain flexibility, thereby being able to adapt to the environment inside the vehicle for bending, and adapt to the complex wiring path and variable space layout inside the vehicle. In particular, since the length of the wire harness protection device 1 is determined by the number of housings 2, the appropriate number of housings 2 can be flexibly selected according to the length of the wire harness, so as to assemble the wire harness protection device 1 which is adapted to the length of the wire harness.

[0069] Figure 2 is a structural schematic view of the housing.

[0070] Referring to Figure 2 Each housing 2 comprises a peripheral wall 20, one end of the peripheral wall 20 is provided with a first rotating connection part 21, and the other end of the peripheral wall 20 is provided with a second rotating connection part 22. The first rotating connection part of one housing can be connected with the second rotating connection part of the adjacent other housing, and thereby the two adjacent housings are rotatably connected.

[0071] Figure 3 is a schematic view of the housing observed along the axial direction of the housing.

[0072] Referring to Figure 2 and Figure 3 The peripheral wall 20 defines a receiving space SP1 for receiving the wire harness, and the wire harness inside the vehicle can be received into the receiving space SP1. That is, the peripheral wall 20 can be wrapped around the outer periphery of the wire harness, not only can play a role of collecting and fixing the wire harness, but also can protect the wire harness.

[0073] The peripheral wall 20 comprises a first part 201 and a second part 202, and the first part 201 and the second part 202 can be matched and assembled into a complete peripheral wall 20. The first part 201 and the second part 202 are respectively a part of the periphery of the peripheral wall 20, that is, the receiving space SP1 is defined after the first part 201 and the second part 202 are assembled.

[0074] When receiving the wire harness, one of the first part 201 and the second part 202 can be placed on one side of the wire harness, and then the other of the first part 201 and the second part 202 can be placed on the other side of the wire harness, and finally the first part 201 and the second part 202 are moved towards each other to be assembled into a complete peripheral wall 20, and the receiving space SP1 is defined, and the wire harness is received in the receiving space SP1.

[0075] In particular, when the first part 201 and the second part 202 each occupy half of the periphery of the peripheral wall 20, it is more conducive to the assembly of the first part 201 and the second part 202 on both sides of the wire harness.

[0076] The shell 2 is further provided with a first clamping part and a second clamping part. After the first part 201 and the second part 202 are assembled into the complete peripheral wall 20, the first clamping part can be engaged with the second clamping part, thereby limiting the mutual separation of the first part 201 and the second part 202 after assembly, ensuring that the first part 201 and the second part 202 can stably wrap around the outer periphery of the wire harness.

[0077] Figure 4 is a structural diagram of the clamping groove from another perspective; Figure 5 is a structural diagram of the clamping groove from another perspective; Figure 6 is a structural diagram of the clamping block; Figure 7 is a structural diagram of the clamping block from another perspective.

[0078] The first clamping part and the second clamping part will be described below Figures 2 to 7 by way of example.

[0079] In combination with reference to Figure 2 and Figure 3 , the first clamping part can be provided on the first part 201. Specifically, the first clamping part can be clamping grooves 23 provided on both sides of the first part 201, and the two clamping grooves 23 are respectively located at the edge portions of the outer surface of the first part 201, and the two clamping grooves 23 are symmetrically provided on the first part 201. In combination with reference to Figure 4 and Figure 5 , each clamping groove 23 includes two side plates 231 and a connecting plate 232, the two side plates 231 are spaced apart along the axial direction of the peripheral wall, and the connecting plate 232 connects the top ends of the two side plates 231 and defines a plug-in passage SP2.

[0080] Correspondingly, the second clamping part can be provided on the second part 202. Specifically, in combination with reference to Figure 2 and Figure 3 , the second clamping part can be clamping blocks 24 provided on both sides of the second part 202, and the two clamping blocks 24 provided on both sides of the second part 202 can respectively pass through the plug-in passage SP2 to be embedded in the clamping grooves 23 provided on both sides of the first part 201. The two clamping blocks 24 are respectively located at the edge portions of the outer surface of the second part 202, and each corresponds to a clamping groove 23, that is, the two clamping blocks 24 are symmetrically provided on both sides of the second part 202.

[0081] In combination with reference to Figure 6 and Figure 7 , each clamping block 24 includes a plug-in plate 241 and a wedge-shaped block 242.

[0082] One end of the insertion plate 241 is connected to the outer surface of the second part 202. In the process of assembling the first part 201 and the second part 202 into the complete peripheral wall 20, the insertion plate 241 is inserted into the insertion passage SP2. Meanwhile, the other end of the insertion plate 241 can be displaced to the radial inner side of the second part 202 after being subjected to an external force.

[0083] The wedge-shaped block 242 is arranged at the other end of the insertion plate 241. Moreover, the side of the wedge-shaped block 242 away from the second part 202 forms a pressure slope 242a, which can be in contact with the connecting plate 232 of the clamping groove 23 in the process of inserting the insertion plate 241 into the insertion passage SP2, and generate an external force so that the insertion plate 241 can be displaced to the radial inner side of the second part 202, and thus the wedge-shaped block 242 can pass through the insertion passage SP2. The side of the wedge-shaped block 242 close to the second part 202 forms a stop surface 242b, which can abut against the connecting plate 232 after the wedge-shaped block 242 passes through the insertion passage SP2, so that the clamping block 24 is engaged with the clamping groove 23.

[0084] It is worth mentioning that the first part 201 and the clamping groove 23, and the second part 202 and the clamping block 24 can be integrally formed by injection molding process, that is, the shell 2 is made of plastic material. This not only can reduce the manufacturing cost, but also can utilize the elastic ability of the plastic material to make the clamping block 24 more easily embedded into the clamping groove 23.

[0085] In order to facilitate the separation of the first part 201 and the second part 202, a pressing surface 243 is further arranged at the other end of the insertion plate 241, which is further away from the second part 202 relative to the wedge-shaped block 242. The pressing surface 243 can facilitate the application of an external force to the insertion plate 241, so that the clamping block 24 can be disengaged from the clamping groove 23 to separate the first part 201 and the second part 202.

[0086] Referring to Figure 2 , the inner surface of the peripheral wall 20 further forms a convex rib 25, wherein the inner surface of the peripheral wall 20 includes the inner surface of the first part 201 and the inner surface of the second part 202. In other words, the inner surface of the first part 201 and / or the inner surface of the second part 202 forms the convex rib 25, which can press the wire harness after the wire harness is accommodated into the accommodation space SP1 to avoid the wire harness from shaking in the accommodation space SP1.

[0087] Figure 8 is a structural schematic view of the first rotary connection part in an embodiment; Figure 9 is a structural schematic view of the second rotary connection part in an embodiment.

[0088] Referring to Figure 2 , Figure 8 ,Figure 9 The first rotation connecting portion and the second rotation connecting portion of the housing in one embodiment are exemplarily illustrated.

[0089] The first rotation connecting portion 21 includes an extension plate 211 and a rotation hole 212 formed in the extension plate 211. One end of the extension plate 211 is connected to the end of the peripheral wall 20 and extends along the axial direction of the peripheral wall 20, and the rotation hole 212 is located at the other end of the extension plate 211, and the rotation hole 212 also has a notch 212'.

[0090] The second rotation connecting portion 22 includes a rotation shaft 221 and a blocking plate 222. One end of the rotation shaft 221 is connected to the peripheral wall 20, and the other end is provided with the blocking plate 222. The diameter of the rotation shaft 221 is less than or equal to the diameter of the rotation hole 212, but greater than the size X of the notch 212'. The diameter of the blocking plate 222 is greater than the diameter of the rotation hole 212.

[0091] When assembling the wire harness protection device 1, the rotation shaft 221 of one housing 2 can be clamped into the rotation hole 212 of the other housing 2 from the notch 212' of the rotation hole 212 of the other housing 2, so that the two housings 2 are rotatably connected.

[0092] Further, the first rotation connecting portion 21 and the second rotation connecting portion 22 are both provided with two. The two first rotation connecting portions 21 are provided on opposite sides of the peripheral wall 20, and the two second rotation connecting portions 22 are each corresponding to one first rotation connecting portion 21 and are also provided on opposite sides of the peripheral wall 20. Moreover, the two first rotation connecting portions 21 are respectively provided on the first portion 201 and the second portion 202 of the peripheral wall 20, and correspondingly, the two second rotation connecting portions 22 are also respectively provided on the first portion 201 of the peripheral wall 20 and the second portion 202 of the peripheral wall 20.

[0093] Figure 10 The structure of the first rotation connecting portion and the second rotation connecting portion in another embodiment is shown. Figure 10a The structure of the first rotation connecting portion and the second rotation connecting portion in another embodiment is shown. Figure 10 The structure of the first rotation connecting portion and the second rotation connecting portion in another embodiment is shown.

[0094] The structure of the first rotation connecting portion and the second rotation connecting portion in another embodiment is shown. Figure 10 The structure of the first rotation connecting portion and the second rotation connecting portion in another embodiment is shown. Figure 10a The structure of the first rotation connecting portion and the second rotation connecting portion in another embodiment is shown.

[0095] The structure of the first rotation connecting portion and the second rotation connecting portion in another embodiment is shown. Figure 10 The first rotation connecting portion 21 includes a first extension rod 211a and a ball socket 212a. One end of the first extension rod 211a is connected to the peripheral wall 20 and extends along the axial direction of the peripheral wall 20, and the ball socket 212a is provided at the other end of the first extension rod 211a. Referring to Figure 10aThe ball socket 212a has a spherical cavity 212a', and an opening 212a" of the spherical cavity 212a' faces the radial inner side of the peripheral wall 20.

[0096] The second rotation connecting part 22 includes a second extension rod 221a and a ball head 222a. One end of the second extension rod 221a is connected to the peripheral wall 20 and extends away from the peripheral wall 20. Specifically, the second extension rod 221a extends radially outwardly of the peripheral wall 20 so that the other end of the second extension rod 221a is away from the peripheral wall. The ball head 222a is arranged at the other end of the second extension rod 221a.

[0097] When assembling the wire harness protection device 1, the ball head of one housing can be embedded into the spherical cavity of the other housing, and thus the two housings 2 are rotationally connected.

[0098] It is worth mentioning that the first rotation connecting part 21 and the second rotation connecting part 22 are both arranged as one. The first rotation connecting part 21 can be arranged at the first portion 201 or the second portion 202 of the peripheral wall 20, and the second rotation connecting part 22 can also be arranged at the first portion 201 or the second portion 202 of the peripheral wall 20. In other words, the first rotation connecting part 21 and the second rotation connecting part 22 can be located at different sides of the peripheral wall 20.

[0099] Figure 11 A structure diagram of the first rotation connecting part in another embodiment is shown; Figure 12 A structure diagram of the second rotation connecting part in another embodiment is shown.

[0100] For reference, Figure 11 and Figure 12 In this embodiment, the ball joint structure is also used to connect the two adjacent housings, and the difference from the previous embodiment is only that the extension direction of the second extension rod is different, and the opening 212a" of the spherical cavity 212a' faces a different direction,

[0101] In this embodiment, the second extension rod 221a extends along the axial direction of the peripheral wall 20 so that one end of the second extension rod 221a is connected to the peripheral wall 20 and the other end can be away from the peripheral wall 20. Meanwhile, the opening 212a" of the spherical cavity 212a' in this embodiment faces the distal end of the axial direction of the peripheral wall 20. For other structures in this embodiment, please refer to the embodiment of the ball joint structure shown in Figure 10 and the description thereof will not be repeated here.

[0102] The foregoing description of the specific exemplary embodiments presented in the preceding is intended for the purpose of illustration and description. The foregoing description is not intended to be exhaustive or to be limited to the precise form disclosed. Obviously, many modifications and variations are possible in light of the above teachings. The exemplary embodiments were chosen and described in order to explain the principles of the application and its practical application and to enable others skilled in the art to understand the application for various exemplary embodiments and its various selection forms and modification forms. The scope of the application is defined by the following claims and their equivalents.

Claims

1. A wire harness protection device, characterized in that, It includes multiple housings that are rotatably connected in sequence, wherein each housing includes: The perimeter wall defines a storage space for accommodating the wire harness; A first rotating connecting portion is disposed at one end of the peripheral wall; and The second rotating connection part is disposed at the other end of the peripheral wall, corresponding to the first rotating connection part; In this configuration, a first rotatable connection of one housing can be connected to a second rotatable connection of an adjacent housing, thereby enabling the two adjacent housings to be rotatably connected.

2. The wire harness protection device according to claim 1, characterized in that, The peripheral wall includes a first part and a second part, which are respectively circumferential parts of the peripheral wall and can be assembled together to form a complete peripheral wall, thereby defining the receiving space; The housing further includes: A first engaging portion is disposed in the first part; The second engaging portion is disposed in the second part; Wherein, after the first engaging part can engage with the second engaging part, the first part and the second part can be assembled into a complete peripheral wall.

3. The wire harness protection device according to claim 2, characterized in that, The first engaging portion is a slot, and the slot includes: Two side plates are spaced apart and disposed at the edges of the outer surface of the first part; A connecting plate that connects two side plates and defines an insertion channel with the two side plates; The second engaging portion is a locking block corresponding to the locking slot, the locking block comprising: A plug-in plate, one end of which is connected to the edge of the outer surface of the second part and can be inserted into the plug-in channel; A wedge block is disposed at the other end of the plug plate, and the side of the wedge block away from the second part forms a pressure ramp, and the side of the wedge block close to the second part forms a stop surface.

4. The wire harness protection device according to claim 3, characterized in that, The other end of the plug plate also has a pressing surface, which is further away from the second part relative to the wedge block.

5. The wire harness protection device according to claim 3, characterized in that, The first part and the second part each occupy half of the circumference of the peripheral wall; The first part has slots on both sides, and the two slots are symmetrically arranged in the first part; The second part has the card blocks on both sides, and the two card blocks are symmetrically arranged in the second part.

6. The wire harness protection device according to any one of claims 1-5, characterized in that, The inner surface of the peripheral wall is formed with ribs, which can press down on the wire harness after it is received into the receiving space.

7. The wire harness protection device according to any one of claims 1-5, characterized in that, The first rotating connecting part includes: An extension plate, one end of which is connected to the peripheral wall and extends axially along the peripheral wall; A drill hole is formed at the other end of the extension plate and has a notch; The second rotating connection part includes: A rotating shaft, one end of which is connected to the peripheral wall; A baffle is provided at the other end of the rotating shaft, and its diameter is larger than the radial dimension of the rotating hole.

8. The wire harness protection device according to claim 7, characterized in that, The diameter of the rotating shaft is less than or equal to the diameter of the rotating hole, but greater than the size of the notch.

9. The wire harness protection device according to claim 7, characterized in that, Both the first and second rotating connecting parts are provided in pairs, with each of the two first rotating connecting parts corresponding to one second rotating connecting part disposed on opposite sides of the peripheral wall.

10. The wire harness protection device according to any one of claims 1-5, characterized in that, The first rotating connecting part includes: A first extension rod, one end of which is connected to the peripheral wall and extends axially along the peripheral wall; A spherical cavity, which is connected to the other end of the first extension rod, and has an open spherical chamber; The second rotating connection part includes: The second extension rod has one end connected to the peripheral wall and extends in a direction away from the peripheral wall; The ball head is located at the other end of the second extension rod.

11. The wire harness protection device according to claim 10, characterized in that, The second extension rod extends radially outward along the peripheral wall, while the opening of the spherical chamber faces radially inward toward the peripheral wall.

12. The wire harness protection device according to claim 10, characterized in that, The second extension rod extends axially along the peripheral wall, while the opening of the spherical chamber faces the distal end of the peripheral wall in the axial direction.

13. The wire harness protection device according to claim 9, characterized in that, Both the first rotating connecting part and the second rotating connecting part are provided as one, and are located on the same side of the peripheral wall.

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