connection structure

Abstract

This utility model relates to the field of furniture technology and discloses a connection structure. The connection structure includes a connecting seat, a connecting member, and a driving member. The connecting seat is disposed on a first rotating member; the connecting member is disposed on a second rotating member and movably connected to the connecting seat; a first end of the driving member is connected to the connecting seat, and a second end of the driving member is connected to the second rotating member; the driving member is used to drive the first and second rotating members to rotate. This connection structure significantly reduces the number of parts required to achieve rotation of the first and second rotating members, thereby reducing the cost and installation / maintenance difficulty of the connection structure.

Description

Technical Field

[0001] This utility model belongs to the field of furniture and household products technology, and in particular relates to a connection structure. Background Technology

[0002] In the design and manufacture of some furniture, the rotating function of components is one of the key aspects of realizing the practical value of these pieces. Take the electric smart bed as an example: the upper part of the bed frame can be folded relative to the lower part, and the upper part also includes independently rotating headboard, backboard, and lumbar support. This multi-layered rotating design allows the angle to be adjusted in real time according to the user's lying posture, meeting the user's needs for diverse scenarios.

[0003] In existing technologies, hinges are commonly used as traditional connectors when connecting two components that need to rotate relative to each other. However, for large furniture like electric smart beds, multiple hinges are often required at the component connections to ensure stability and load-bearing capacity during rotation. This not only increases material costs but also complicates the assembly process. Furthermore, in large furniture like electric smart beds, the relative rotation of two components is driven by motors or other drive components. These drive components are typically mounted on one component and connected to the other via a specialized mounting bracket. This design further increases the manufacturing cost of electric smart beds and also increases the difficulty of later maintenance due to the collaborative work of multiple components.

[0004] Therefore, a connection structure is urgently needed to solve the above problems. Utility Model Content

[0005] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a connection structure that significantly reduces the number of parts that enable the first rotating part and the second rotating part to rotate, thereby reducing the cost of the connection structure and the difficulty of installation and maintenance.

[0006] To achieve this objective, the present invention adopts the following technical solution:

[0007] A connection structure is provided, including:

[0008] The connecting seat is disposed on the first rotating member;

[0009] A connector is mounted on the second rotating member and is movably connected to the connecting seat;

[0010] The driving component has a first end connected to the connecting seat and a second end connected to the second rotating component; the driving component is used to drive the first rotating component and the second rotating component to rotate.

[0011] Optionally, the connection structure also includes a rotating shaft, a first connecting part is provided on the connecting seat, a second connecting part is provided on the connecting member, and the rotating shaft is installed on the first connecting part and the second connecting part.

[0012] Optionally, a first bushing is provided between the rotating shaft and the first connecting part.

[0013] Optionally, a second bushing is provided between the rotating shaft and the second connecting part.

[0014] Optionally, the first connecting part is provided with a first mounting groove, the rotating shaft is mounted in the first mounting groove, and the first mounting groove is provided with a first notch.

[0015] Optionally, the second connecting part is provided with a second mounting groove, the rotating shaft is mounted in the second mounting groove, and the second mounting groove is provided with a second notch.

[0016] Optionally, the surface of the first bushing is provided with a first guide slope, which extends along the axial direction of the rotating shaft.

[0017] Optionally, the surface of the second bushing is provided with a second guide slope, which extends axially along the rotation shaft.

[0018] Optionally, a first limiting ring is provided on the surface of the first bushing, and the first limiting ring is disposed between the connecting seat and the connecting member.

[0019] Optionally, a second limiting ring is provided on the surface of the second bushing, and the second limiting ring abuts against the connecting piece.

[0020] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0021] This invention provides a connection structure in which a connecting seat and a connecting member are movably connected. When the connecting seat moves relative to the connecting member, a first rotating member connected to the connecting seat can move relative to a second rotating member connected to the connecting member, thus realizing a movable connection between the first and second rotating members. A driving member can be connected to the connecting seat, that is, the driving member can be connected to both the first and second rotating members, thereby enabling the driving member to drive both the first and second rotating members to rotate. Compared with the prior art, the connection structure provided by this invention not only realizes a movable connection between the first and second rotating members but also enables the driving member to connect to both the first and second rotating members, allowing the driving member to directly drive the first rotating member to rotate relative to the second rotating member. This significantly reduces the number of components required to achieve the rotation of the first and second rotating members, lowering the cost of the connection structure and reducing the difficulty of installation and maintenance. Attached Figure Description

[0022] Figure 1 A schematic diagram illustrating the usage state of the connection structure provided by this utility model;

[0023] Figure 2 A schematic diagram of the connection structure provided by this utility model;

[0024] Figure 3 A schematic diagram of the connecting seat of the connection structure provided by this utility model;

[0025] Figure 4 A schematic diagram of the connecting component of the connection structure provided by this utility model;

[0026] Figure 5 A schematic diagram of the rotating shaft of the connection structure provided by this utility model.

[0027] in:

[0028] 100. First rotating component; 200. Second rotating component;

[0029] 1. Connecting seat; 11. First connecting part; 12. First mounting slot; 121. First notch; 13. Drive connecting part;

[0030] 2. Connector; 21. Second connecting part; 22. Second mounting groove; 221. Second notch; 23. Connecting plate;

[0031] 3. Driving components;

[0032] 4. Rotating shaft;

[0033] 5. First bushing; 51. First guide slope; 52. First limiting ring;

[0034] 6. Second bushing; 61. Second guide ramp; 62. Second limiting ring;

[0035] 7. Fasteners. Detailed Implementation

[0036] It should be understood that in the description of this utility model, the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0037] It should be noted that, in the description of this utility model, unless otherwise explicitly specified and limited, the terms "set," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; 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; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0038] The technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments.

[0039] like Figures 1 to 5 As shown, this embodiment provides a connection structure that significantly reduces the number of parts required to rotate the first rotating member 100 and the second rotating member 200, thereby reducing the cost and installation / maintenance difficulty of the connection structure.

[0040] See Figure 1 and Figure 2 The connection structure includes a connecting seat 1, a connecting member 2, and a driving member 3. The connecting seat 1 is disposed on the first rotating member 100; the connecting member 2 is disposed on the second rotating member 200 and is movably connected to the connecting seat 1; the first end of the driving member 3 is connected to the connecting seat 1, and the second end of the driving member 3 is connected to the second rotating member 200; the driving member 3 is used to drive the first rotating member 100 and the second rotating member 200 to rotate.

[0041] In the connection structure provided in this embodiment, the connecting seat 1 and the connecting member 2 are movably connected. When the connecting seat 1 moves relative to the connecting member 2, the first rotating member 100 connected to the connecting seat 1 can move relative to the second rotating member 200 connected to the connecting member 2, thus realizing the movable connection between the first rotating member 100 and the second rotating member 200. The driving member 3 is connected to the connecting seat 1, that is, the driving member 3 can be connected to the first rotating member 100 and the second rotating member 200, thereby enabling the driving member 3 to drive the first rotating member 100 and the second rotating member 200 to rotate. Compared with the prior art, by using the connection structure provided in this embodiment, both the movable connection between the first rotating member 100 and the second rotating member 200 and the connection between the driving member 3 and the first rotating member 100 and the second rotating member 200 can be realized, so that the driving member 3 can directly drive the first rotating member 100 to rotate relative to the second rotating member 200. This significantly reduces the number of parts that enable the rotation of the first rotating member 100 and the second rotating member 200, and reduces the cost and installation and maintenance difficulty of the connection structure.

[0042] For example, taking an electric smart bed as an example, the first rotating component 100 is the headboard or waistboard of the electric smart bed, the second rotating component 200 is the backboard of the electric smart bed, and the driving component 3 is the head motor or waist motor of the electric smart bed, used to drive the headboard to rotate relative to the backboard or drive the waistboard to rotate relative to the backboard.

[0043] Optionally, see Figure 1 , Figure 3 and Figure 4 The connection structure also includes a rotating shaft 4. A first connecting part 11 is provided on the connecting seat 1, and a second connecting part 21 is provided on the connecting member 2. The rotating shaft 4 is mounted on the first connecting part 11 and the second connecting part 21. The first connecting part 11 and the second connecting part 21 are rotatably connected to each other through the rotating shaft 4, thereby enabling the connecting seat 1 to rotate relative to the connecting member 2, and the first rotating member 100 to rotate relative to the second rotating member 200 under the drive of the driving member 3.

[0044] See Figure 1 , Figure 3 and Figure 4 Rotating shaft 4 along its axial direction ( Figure 1 The X-direction of the component passes through the first connecting part 11 and the second connecting part 21, and is rotatably engaged with both the first connecting part 11 and the second connecting part 21.

[0045] Specifically, see Figure 1 , Figure 3 and Figure 4 The connector 2 is provided with two second connecting parts 21, which are arranged at intervals along the axial direction of the rotating shaft 4. The first connecting part 11 is located between the two second connecting parts 21, and the rotating shaft 4 passes through one second connecting part 21, the first connecting part 11 and the other second connecting part 21 in sequence.

[0046] Optionally, see Figure 3 and Figure 5 A first bushing 5 is provided between the rotating shaft 4 and the first connecting part 11. The rotating shaft 4 and the first connecting part 11 reciprocate. During this reciprocating motion, the connecting surfaces of the rotating shaft 4 and the first connecting part 11 generate heat and micro-cutting due to friction, leading to wear or even seizing of the rotating shaft 4 and the first connecting part 11, preventing them from rotating. The first bushing 5, as an intermediate layer, isolates the direct contact between the rotating shaft 4 and the first connecting part 11, transferring the friction pair between the first bushing 5 and the rotating shaft 4, protecting the first connecting part 11 and the rotating shaft 4 from damage, and extending their service life. Furthermore, by adjusting the thickness or position of the first bushing 5, dimensional deviations between the rotating shaft 4 and the first connecting part 11 can be compensated, reducing the difficulty of assembling the rotating shaft 4 and the first connecting part 11.

[0047] For example, the first bushing 5 is made of rubber. Rubber has excellent shock absorption and cushioning properties, which helps to reduce vibration and impact between the rotating shaft 4 and the first connecting part 11, and reduce wear between the rotating shaft 4 and the first connecting part 11. In particular, when the first rotating member 100 and the second rotating member 200 are components of an electric smart bed, the first bushing 5 also helps to improve the user's experience and comfort of using the electric smart bed.

[0048] In this embodiment, see Figure 3 and Figure 5 The surface of the first bushing 5 is provided with a first guide slope 51, which extends along the axial direction of the rotating shaft 4. The first guide slope 51 can guide the movement direction of the first bushing 5, so that the first bushing 5 can be smoothly and accurately installed between the rotating shaft 4 and the first connecting part 11.

[0049] In some embodiments, see Figure 3 and Figure 5 The first guide slope 51 is disposed on the outer surface of the first bushing 5 and located at the end of the first bushing 5. At this time, the first guide slope 51 can guide the direction of connection between the first bushing 5 and the first connecting part 11.

[0050] In some embodiments, the first guide slope 51 is disposed on the inner surface of the first bushing 5 and located at the end of the first bushing 5. In this case, the first guide slope 51 can guide the direction of connection between the first bushing 5 and the rotating shaft 4.

[0051] In this embodiment, see Figure 1 and Figure 5 A first limiting ring 52 is provided on the surface of the first bushing 5. The first limiting ring 52 is disposed between the connecting seat 1 and the connecting member 2 to limit the relative position between the connecting seat 1 and the first bushing 5, as well as the relative position between the connecting member 2 and the first bushing 5. This ensures that only rotation can occur between the connecting member 2 and the rotating shaft 4, and between the connecting seat 1 and the rotating shaft 4, without any movement. The first limiting ring 52 is circular, which also ensures that the first limiting ring 52 can always play a limiting role during the relative rotation of the connecting seat 1 and the connecting member 2, thus guaranteeing the stability of its limiting effect.

[0052] Specifically, see Figure 3 , Figure 4 and Figure 5 The first limiting ring 52 is sleeved on the first bushing 5. The connector 2 is provided with two second connecting parts 21. The two second connecting parts 21 are arranged at axial intervals along the rotating shaft 4. The first connecting part 11 is located between the two second connecting parts 21. The first limiting ring 52 is located between the first connecting part 11 and one second connecting part 21.

[0053] Optionally, see Figure 4 and Figure 5 A second bushing 6 is provided between the rotating shaft 4 and the second connecting part 21. The rotating shaft 4 and the second connecting part 21 reciprocate. During this reciprocating motion, the connecting surfaces of the rotating shaft 4 and the second connecting part 21 generate heat and micro-cutting due to friction, leading to wear or even seizing of the rotating shaft 4 and the second connecting part 21, preventing them from rotating. The second bushing 6, acting as an intermediate layer, isolates the direct contact between the rotating shaft 4 and the second connecting part 21, transferring the friction pair between the second bushing 6 and the rotating shaft 4, protecting both the second connecting part 21 and the rotating shaft 4 from damage, and extending their service life. Furthermore, by adjusting the thickness or position of the second bushing 6, dimensional deviations between the rotating shaft 4 and the second connecting part 21 can be compensated, reducing the difficulty of assembling the rotating shaft 4 and the second connecting part 21.

[0054] For example, the second bushing 6 is made of rubber. Rubber has excellent shock absorption and cushioning properties, which helps to reduce vibration and impact between the rotating shaft 4 and the second connecting part 21, and reduce wear between the rotating shaft 4 and the second connecting part 21. In particular, when the first rotating member 100 and the second rotating member 200 are components of an electric smart bed, the second bushing 6 also helps to improve the user's experience and comfort of using the electric smart bed.

[0055] Specifically, see Figure 4 and Figure 5 The connector 2 is provided with two second connecting parts 21, which are arranged at intervals along the axial direction of the rotating shaft 4. Each second connecting part 21 is provided with a second bushing 6 between it and the rotating shaft 4.

[0056] In this embodiment, see Figure 4 and Figure 5 The surface of the second bushing 6 is provided with a second guide slope 61, which extends along the axial direction of the rotating shaft 4. The second guide slope 61 can guide the movement direction of the second bushing 6, so that the second bushing 6 can be smoothly and accurately installed between the rotating shaft 4 and the second connecting part 21.

[0057] In some embodiments, see Figure 4 and Figure 5 The second guide slope 61 is disposed on the outer surface of the second bushing 6 and located at the end of the second bushing 6. At this time, the second guide slope 61 can guide the direction of connection between the second bushing 6 and the second connecting part 21.

[0058] In some embodiments, the second guide slope 61 is disposed on the inner surface of the second bushing 6 and located at the end of the second bushing 6. In this case, the second guide slope 61 can guide the direction of connection between the second bushing 6 and the rotating shaft 4.

[0059] In this embodiment, see Figure 1 and Figure 5 A second limiting ring 62 is provided on the surface of the second bushing 6. The second limiting ring 62 abuts against the connecting member 2 to limit the relative position between the connecting member 2 and the second bushing 6. This not only ensures that the connecting member 2 and the rotating shaft 4 can only rotate and not move, but also ensures that the connecting member 2 will not separate from the rotating shaft 4, thus guaranteeing the stability of the connection between the connecting member 2 and the rotating shaft 4. The second limiting ring 62 is designed to be annular, which also ensures that the second limiting ring 62 can always play a limiting role during the relative rotation of the connecting seat 1 and the connecting member 2, thus guaranteeing the stability of its limiting effect.

[0060] Specifically, see Figure 3 , Figure 4 and Figure 5 The second limiting ring 62 is sleeved on the second bushing 6. The connector 2 is provided with two second connecting parts 21. The two second connecting parts 21 are arranged at intervals along the axial direction of the rotating shaft 4. The first connecting part 11 is located between the two second connecting parts 21. The second limiting ring 62 is located at the end of the second connecting part 21 away from the first connecting part 11, so that neither the connecting seat 1 nor the connector 2 will separate from the rotating shaft 4.

[0061] Optionally, see Figure 3 and Figure 5 A first mounting groove 12 is provided on the first connecting part 11, and the rotating shaft 4 is mounted in the first mounting groove 12. A first notch 121 is provided on the first mounting groove 12. The first notch 121 can interrupt the continuity of the groove wall of the first mounting groove 12, changing the first mounting groove 12 from a rigid space to an elastic space. This not only allows rotating shafts 4 with different cross-sectional sizes to be installed in the first mounting groove 12, improving the versatility of the connecting seat 1, but also helps to reduce the assembly precision requirements between the rotating shaft 4 and the first connecting part 11. In addition, the setting of the first notch 121 also allows the rotating shaft 4 to wobble slightly in the first mounting groove 12, providing a buffer for the impact between the rotating shaft 4 and the groove wall of the first mounting groove 12, helping to prevent damage to the rotating shaft 4 and the first connecting part 11.

[0062] Specifically, see Figure 3 and Figure 5 The first mounting groove 12 extends along the axial direction of the rotating shaft 4, and the first notch 121 is set along the length direction of the first mounting groove 12.

[0063] For example, see Figure 3 and Figure 5 The cross-sectional shape of the rotating shaft 4 is circular, and the first mounting groove 12 is an arc-shaped groove to accommodate the installation and rotation of the rotating shaft 4.

[0064] In this embodiment, see Figure 3 and Figure 5The first bushing 5 is fitted onto the rotating shaft 4 and located in the first mounting groove 12.

[0065] Optionally, see Figure 4 and Figure 5 The second connecting part 21 is provided with a second mounting groove 22, and the rotating shaft 4 is mounted in the second mounting groove 22. The second mounting groove 22 is provided with a second notch 221. The second notch 221 can interrupt the continuity of the groove wall of the second mounting groove 22, changing the second mounting groove 22 from a rigid space to an elastic space. This not only allows rotating shafts 4 with different cross-sectional sizes to be installed in the second mounting groove 22, improving the versatility of the connector 2, but also helps to reduce the assembly accuracy requirements between the rotating shaft 4 and the second connecting part 21. In addition, the setting of the second notch 221 also allows the rotating shaft 4 to wobble slightly in the second mounting groove 22, providing a buffer for the impact between the rotating shaft 4 and the groove wall of the second mounting groove 22, helping to prevent damage to the rotating shaft 4 and the second connecting part 21.

[0066] Specifically, see Figure 4 and Figure 5 The second mounting groove 22 extends along the axial direction of the rotating shaft 4, and the second notch 221 is provided along the length direction of the second mounting groove 22.

[0067] For example, see Figure 4 and Figure 5 The cross-sectional shape of the rotating shaft 4 is circular, and the second mounting groove 22 is an arc-shaped groove to accommodate the installation and rotation of the rotating shaft 4.

[0068] In this embodiment, see Figure 4 and Figure 5 The second bushing 6 is fitted onto the rotating shaft 4 and is located in the second mounting groove 22.

[0069] Optionally, see Figure 1 and Figure 4 The connecting member 2 also includes a connecting plate 23, which is connected to the second rotating member 200 and connected to the second connecting part 21. The connecting plate 23 has a large cross-sectional area, which allows for a larger contact area with the second rotating member 200, thus helping to improve the connection strength between the connecting member 2 and the second rotating member 200 and enhancing the stability of rotation between the first rotating member 100 and the second rotating member 200.

[0070] For example, the connecting plate 23 uses hinge blades, and the rotating shaft 4 uses hinge pins.

[0071] Optionally, see Figure 1 The connector 2 is detachably connected to the second rotating member 200, so that when the connector 2 is damaged and cannot be used, the connector 2 can be removed from the second rotating member 200 for repair or replacement.

[0072] In this embodiment, see Figure 1 and Figure 4 The connection structure also includes multiple fasteners 7, which pass through the connector 2 and are fastened to the second rotating member 200 to achieve a detachable connection between the connector 2 and the second rotating member 200.

[0073] Specifically, see Figure 4 Fastener 7 passes through the connecting plate 23 of connector 2.

[0074] In this embodiment, see Figure 1 and Figure 4 The lines connecting the multiple fasteners 7 are broken lines. This design not only disperses the stress of the multiple fasteners 7 and reduces the risk of local failure, but also enhances the overall rigidity of the connector 2 and the second rotating member 200, suppresses the deformation of the connector 2 and the second rotating member 200, and extends their service life.

[0075] For example, see Figure 4 Fastener 7 has four fasteners.

[0076] For example, fastener 7 is a bolt.

[0077] Optionally, see Figure 1 The connecting seat 1 is detachably connected to the first rotating member 100, so that when the connecting seat 1 is damaged and cannot be used, the connecting seat 1 can be removed from the first rotating member 100 for repair or replacement.

[0078] For example, the connecting seat 1 is connected to the first rotating member 100 by bolts.

[0079] Optionally, see Figure 1 and Figure 3 The connecting seat 1 also includes a drive connecting part 13. The first end of the drive member 3 is connected to the drive connecting part 13. The drive member 3 drives the connecting seat 1 as a whole to rotate the first rotating member 100 relative to the second rotating member 200 through the drive connecting part 13.

[0080] For example, taking an electric smart bed as an example, the drive connection part 13 includes a connecting ear plate and a connecting shaft. The connecting shaft passes through the connecting ear plate and the output end of the head motor or waist motor, and the connecting shaft is rotatably engaged with the output end of the head motor or waist motor.

[0081] Optionally, see Figure 1 The connecting seat 1 and the first rotating member 100 are aligned in a preset direction ( Figure 1The connection length (in the Y direction) is not less than half the length of the first rotating member 100 along the preset direction. This setting helps to lengthen the load transmission path, making the stress distribution between the connecting seat 1 and the first rotating member 100 more uniform; on the other hand, it helps to increase the connection stiffness between the connecting seat 1 and the first rotating member 100, making it more difficult for bending or torsional deformation to occur at the connection between the connecting seat 1 and the first rotating member 100.

[0082] In this embodiment, the preset direction is the extension direction of the connecting seat 1 on the first rotating member 100.

[0083] For example, taking an electric smart bed as an example, the first rotating member 100 is the headboard or backboard of the electric smart bed, and the preset direction is the length direction of the electric smart bed. In other embodiments, the preset direction is set at an angle to the length direction of the electric smart bed.

[0084] The above description is only a specific embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Those skilled in the art should understand that any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present utility model fall within the protection and disclosure scope of the present utility model.

Claims

1. A connection structure, characterized in that, include: A connecting seat (1) is disposed on the first rotating member (100); The connector (2) is disposed on the second rotating member (200) and is movably connected to the connecting seat (1); The driving component (3) has its first end connected to the connecting seat (1) and its second end connected to the second rotating component (200). The driving component (3) is used to drive the first rotating component (100) and the second rotating component (200) to rotate.

2. The connection structure according to claim 1, characterized in that, The connection structure further includes a rotating shaft (4), a first connecting part (11) is provided on the connecting seat (1), a second connecting part (21) is provided on the connecting member (2), and the rotating shaft (4) is installed on the first connecting part (11) and the second connecting part (21).

3. The connection structure according to claim 2, characterized in that, A first bushing (5) is provided between the rotating shaft (4) and the first connecting part (11).

4. The connection structure according to claim 2, characterized in that, A second bushing (6) is provided between the rotating shaft (4) and the second connecting part (21).

5. The connection structure according to claim 2, characterized in that, The first connecting part (11) is provided with a first mounting groove (12), the rotating shaft (4) is mounted on the first mounting groove (12), and the first mounting groove (12) is provided with a first notch (121).

6. The connection structure according to claim 2, characterized in that, The second connecting part (21) is provided with a second mounting groove (22), the rotating shaft (4) is mounted in the second mounting groove (22), and the second mounting groove (22) is provided with a second notch (221).

7. The connection structure according to claim 3, characterized in that, The surface of the first bushing (5) is provided with a first guide slope (51), which extends along the axial direction of the rotating shaft (4).

8. The connection structure according to claim 4, characterized in that, The surface of the second bushing (6) is provided with a second guide slope (61), which extends along the axial direction of the rotating shaft (4).

9. The connection structure according to claim 3, characterized in that, The surface of the first bushing (5) is provided with a first limiting ring (52), which is disposed between the connecting seat (1) and the connecting member (2).

10. The connection structure according to claim 4, characterized in that, The surface of the second bushing (6) is provided with a second limiting ring (62), which abuts against the connector (2).

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