fastening device

Abstract

The application discloses a fixing device and belongs to the technical field of fitness equipment. The fixing device comprises a clamp assembly, a connecting seat and a locking assembly. The clamp assembly comprises a main frame and a base, and the main frame is provided with an abutting surface. The connecting seat is arranged on the side of the base away from the main frame. The locking assembly comprises a locking connecting piece, a first locking piece, a first rotating shaft and a second rotating shaft. One end of the locking connecting piece is connected with the base through the first rotating shaft, and the other end is connected with the first locking piece through the second rotating shaft. The main frame, the first locking piece, the first rotating shaft and the second rotating shaft are configured so that when the connecting seat is pulled, the first locking piece far from the other end of the first rotating shaft has a movement trend towards the main frame. When the connecting seat is pulled, the first locking piece far from the one end of the first rotating shaft has a movement trend towards the main frame, so that the end of the first locking piece does not move away from the main frame, thereby preventing the clamp assembly from being opened, and the connection reliability of the fixing device is improved.

Description

Technical Field

[0001] This application relates to the field of fitness equipment technology, and in particular to a fixing device. Background Technology

[0002] Fitness equipment is typically mounted on the crossbeams or longitudinal beams of a fixed frame, such as a gantry frame, using a fixed device. Users can interact with the equipment, utilizing its power or overcoming its resistance for exercise. The fixed device includes a clamp assembly and a locking assembly. The clamp assembly is used to secure the equipment to an external fixed component (such as a crossbeam or longitudinal beam). The clamp assembly usually consists of two relatively rotatable clamping members. One end of one clamping member is rotatably connected to the other clamping member, while the other end is detachably locked to the other clamping member via a locking assembly. This creates an "open-close" structure between the two clamping members, facilitating the installation of the clamp assembly at any position on the fixed component. In related technologies, when the fixed device is subjected to external tensile force in a certain direction, the locking assembly is prone to accidental loosening, causing the clamp assembly to open and thus affecting the connection reliability of the fixed device. Utility Model Content

[0003] This application provides a fixing device that can solve the technical problem of low connection reliability of fixing devices under tension.

[0004] To address the aforementioned technical problems, this application provides a fixing device, comprising: a clamp assembly including a main frame and a base, the main frame having an abutment surface; the base having a connecting end and a locking end spaced apart, the connecting end being rotatably connected to the main frame; the base having a locked state and an unlocked state, in the locked state, the locking end being detachably locked to the main frame, the base and the main frame forming an accommodating space for accommodating external fixing components; and a connecting seat disposed along a first direction on the side of the base opposite to the main frame and connected to the base, connecting... The base is used for connecting external devices along a first direction; the locking assembly includes a locking connector, a first locking member, a first rotating shaft, and a second rotating shaft, one end of the locking connector is connected to the base via the first rotating shaft, and the other end is connected to the first locking member via the second rotating shaft; in the locked state, the end of the first locking member near the first rotating shaft abuts against the abutment surface; the main frame, the first locking member, the first rotating shaft, and the second rotating shaft are configured such that when the connecting base is pulled, the other end of the first locking member away from the first rotating shaft tends to move toward the main frame.

[0005] The fixing device provided in this application, when the connecting seat is pulled, the end of the first locking member away from the first rotating shaft tends to move towards the main frame, so that the end of the first locking member will not move away from the main frame, thereby preventing the clamp assembly from opening, which helps to improve the connection reliability of the fixing device. Attached Figure Description

[0006] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0007] Figure 1 This is a schematic diagram of the structure of an embodiment of the fixing device provided in this application; Figure 2 This is a cross-sectional structural schematic diagram of an embodiment of the fixing device provided in this application from a certain perspective; Figure 3 This is a partial cross-sectional structural schematic diagram of an embodiment of the fixing device provided in this application from a certain perspective; Figure 4 This is a schematic diagram of the main frame of an embodiment provided in this application from a certain perspective; Figure 5 This is a structural schematic diagram of one embodiment of the main frame provided in this application from another perspective; Figure 6 This is a schematic diagram of the structure of one embodiment of the base provided in this application; Figure 7 This is a schematic diagram of the structure of an embodiment of the first locking member provided in this application; Figure 8 This is a schematic diagram of an embodiment of the second locking member provided in this application. Detailed Implementation

[0008] The present application will now be described in further detail with reference to the accompanying drawings and embodiments. It should be particularly noted that the following embodiments are for illustrative purposes only and do not limit the scope of the application. Similarly, the following embodiments are only some, not all, embodiments of the present application, and all other embodiments obtained by those skilled in the art without inventive effort are within the scope of protection of the present application.

[0009] In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified. The terms "first," "second," and "third" in the embodiments of this application are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined as "first," "second," or "third" may explicitly or implicitly include at least one of that feature. All directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of this application are only used to explain the relative positional relationships and movements between components in a specific orientation (as shown in the figures). If the specific orientation changes, the directional indications also change accordingly. The terms "comprising" and "having," and any variations thereof, in the embodiments of this application are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or device that includes a series of steps or units is not limited to the listed steps or units, but may optionally include steps or units not listed, or may optionally include other steps or components inherent to these processes, methods, products, or devices.

[0010] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0011] This application provides a fixing device. Please refer to [link / reference]. Figures 1-6 The fixing device 100 may include a clamp assembly 10, a fastening assembly 20, a connecting seat 30, and a locking assembly 40. The clamp assembly 10 is provided with a receiving space 13 for accommodating an external fixing member. The external fixing member may be a crossbeam or longitudinal beam of a fixing frame such as a gantry frame. The fastening assembly 20 is used to lock the clamp assembly 10 to the external fixing member, thereby achieving reliable installation of the fitness equipment on the external fixing member. The locking assembly 40 is connected to the clamp assembly 10 and is used to open and close the clamp assembly 10, so that the clamp assembly 10 can be adapted to external fixing members of different specifications. The connecting seat 30 is located outside the receiving space 13 of the clamp assembly 10 and is connected to the clamp assembly 10. The connecting seat 30 is used to connect to external equipment. The external equipment may be cable-type fitness equipment, which can apply resistance or power to the cable, and the user exercises by reciprocatingly pulling the cable or being driven by the cable.

[0012] Please see Figures 1-6The clamp assembly 10 includes a main frame 11 and a base 12. The main frame 11 has an abutment surface 151. The base 12 has a connecting end 125 and a locking end 126 spaced apart. The connecting end 125 is rotatably connected to the main frame 11, allowing the base 12 to rotate relative to the main frame 11, thereby enabling the clamp assembly 10 to open and close. The base 12 has a locked state and an unlocked state. In the locked state, the locking end 126 is detachably locked to the main frame 11, and the base 12 and the main frame 11 enclose a receiving space 13. A connecting seat 30 is disposed along a first direction on the side of the base 12 opposite to the main frame 11 and is connected to the base 12. The connecting seat 30 is used for connecting external equipment along the first direction. Exemplarily, the first direction may be... Figure 2 The positive and negative directions of the Z-axis in the diagram.

[0013] Please see Figures 1-3 The locking assembly 40 includes a locking connector 41, a first locking member 43, a first rotating shaft 42, and a second rotating shaft 44. One end of the locking connector 41 is connected to the base 12 via the first rotating shaft 42, and the other end is connected to the first locking member 43 via the second rotating shaft 44. The locking connector 41 acts as an intermediate force transmission component, rotatably connecting the base 12 and the first locking member 43, allowing the first locking member 43 to move relative to the base 12, thereby locking or unlocking the clamp assembly 10. In the locked state, the end of the first locking member 43 near the first rotating shaft 42 abuts against the abutment surface 151. The main frame 11, the first locking member 43, the first rotating shaft 42, and the second rotating shaft 44 are configured such that when the connecting seat 30 is stretched, the other end of the first locking member 43 away from the first rotating shaft 42 tends to move towards the main frame 11.

[0014] When the connecting seat 30 is pulled, the end of the first locking member 43 away from the first rotating shaft 42 tends to move toward the main frame 11, so that the end of the first locking member 43 will not move away from the main frame 11, thereby preventing the clamp assembly 10 from opening, which helps to improve the connection reliability of the fixing device 100.

[0015] Please see Figure 1 In some embodiments, the clamp assembly 10 is provided with a rotatable rotating connector 60, which is used to connect external equipment (such as a fitness rope) or to allow the user to pick up the fixing device 100.

[0016] In some embodiments, the fixing device 100 can achieve self-locking by using a sloped sliding method (not shown in the figure). For example, the abutment surface 151 is set as a slope. When the connecting seat 30 is pulled, the first locking member 43, under the guiding and limiting action of the slope, generates a lateral sliding tendency perpendicular to the first direction, thereby causing the end of the first locking member 43 away from the first rotating shaft 42 to move towards the main frame 11. The sloped sliding method has a simple structure, and guidance and limiting can be achieved through the sloped engagement, making it easy to manufacture and assemble.

[0017] In some embodiments, such as Figure 3 As shown, in the locked state, when the connecting seat 30 is stretched, the first locking member 43 tends to rotate around a preset rotation axis m. In a reference section perpendicular to the first rotating shaft 42 and the second rotating shaft 44, the rotation axis m is located on the side away from the connecting end 125 of the reference connecting line n between the axis of the first rotating shaft 42 and the axis of the second rotating shaft 44. By setting the rotation axis m at the above position, when the connecting seat 30 is stretched, the first locking member 43 tends to rotate around the rotation axis m, causing the end of the first locking member 43 away from the first rotating shaft 42 to generate an arc-shaped movement tendency toward the main frame 11, thereby pressing the main frame 11. The rotational self-locking method, through the position configuration of the rotation axis m, makes the tendency of the first locking member 43 to press the main frame 11 stronger when the tension is greater, resulting in higher self-locking reliability; and the force is mainly transmitted between the components through rolling or small-amplitude oscillation, resulting in less friction loss, which helps to reduce the risk of component wear and damage and extend service life.

[0018] In some embodiments, the abutment surface 151 may be composed of two intersecting inclined surfaces (not shown in the figure). The two inclined surfaces gradually converge along the first direction and away from the main frame 11 to form a guide structure. In other words, in a reference section perpendicular to the first pivot 42, the profile of the abutment surface 151 is approximately V-shaped. When the connecting seat 30 is under tension, under the guiding and limiting action of the two inclined surfaces, the end of the first locking member 43 away from the first pivot 42 tends to move in an arc shape toward the main frame 11, thereby achieving self-locking.

[0019] Please see Figure 4 In some embodiments, the abutment surface 151 is part of a cylindrical surface. The rotation axis m coincides with the central axis of the cylindrical surface and is parallel to the second rotation axis 44. Since the rotation axis m coincides with the central axis of the cylindrical surface, the first locking member 43 can satisfy the geometric condition of instantaneous pure rolling between itself and the abutment surface 151 under rotational tendency (i.e., when the first locking member 43 generates a rotational tendency, this geometric configuration makes the first locking member 43 and the abutment surface 151 tend to transmit force in a rolling manner rather than a sliding manner), avoiding or reducing sliding friction, thereby reducing wear and helping to extend the service life of the component.

[0020] In some embodiments, the first locking member 43 can achieve tension self-locking by extending the abutment surface 151 outward in a second direction (not shown) such that the abutment surface 151 is positioned sufficiently far away from the connecting end 125 relative to the first pivot 42 and the connecting end 125. Exemplarily, the second direction may be... Figure 2 The positive and negative directions of the X-axis.

[0021] In some embodiments, such as Figure 2 , Figure 3 As shown, within the reference cross-section, in the second direction perpendicular to the first direction, the second pivot 44 is closer to the connecting end 125 than the first pivot 42. The second pivot 44 is located between the first pivot 42 and the connecting end 125, causing the locking connector 41 and the first locking member 43 to tend to be collinear. When the connecting seat 30 is under tension, the end of the first locking member 43 away from the first pivot 42 can generate a stable and strong tendency to move towards the main frame 11, making self-locking more reliable. Since it is not necessary to extend the abutment surface 151 outward along the second direction, it is beneficial to achieve miniaturization of the fixing device 100.

[0022] In some embodiments, the first locking member 43 can be self-locked under tension by increasing the dimension of the locking connector 41 in the second direction (not shown in the figure) and by making the first rotating shaft 42 and the second rotating shaft 44 misaligned in the first direction.

[0023] Please see Figure 2 , Figure 3 In some embodiments, in the locked state, at least a portion of the end of the locking connector 41 connected to the second rotating shaft 44 protrudes towards the connection end 125 in a second direction relative to the other end connected to the first rotating shaft 42, so that the connection position of the second rotating shaft 44 and the locking connector 41 is closer to the connection end 125 than the connection position of the first rotating shaft 42 and the locking connector 41. By providing a partial protrusion structure only at one end of the locking connector 41, the geometric configuration of the second rotating shaft 44 being closer to the connection end 125 relative to the first rotating shaft 42 can be achieved without thickening the entire locking connector 41, which helps to reduce the overall size and weight of the locking connector 41 and makes the structure of the fixing device 100 more compact.

[0024] In some embodiments, such as Figures 2-5As shown, the main frame 11 includes a frame body 14 and an abutment portion 15. The frame body 14 is used to enclose and form an accommodating space 13 with the base 12. The abutment portion 15 is disposed on one side of the frame body 14 along a second direction, and the abutment portion 15 is provided with a first mounting groove 152. An abutment surface 151 is disposed on the abutment portion 15. In the locked state, a portion of the locking connector 41 located between the first rotating shaft 42 and the second rotating shaft 44 is embedded in the first mounting groove 152, and the abutment portion 15 engages with the first locking member 43 on both sides in the third direction. Exemplarily, the first direction, the second direction, and the third direction can be orthogonal to each other, and the third direction can be... Figure 4 The positive and negative directions of the Y-axis. By providing a first mounting groove 152 in the middle region of the abutment portion 15 to accommodate the locking connector 41, the abutment portion 15 forms double-sided support for the first locking member 43 in the third direction, which makes the support stability of the first locking member 43 higher, the force more symmetrical, and the support strength higher, which is conducive to improving the connection reliability of the fixing device 100.

[0025] Please see Figure 6 In some embodiments, the base 12 includes a base body 121 and two first protrusions 122 connected to the base body 121. The two first protrusions 122 are spaced apart along a third direction, and the two ends of the first rotating shaft 42 are respectively mounted on the two first protrusions 122. The two first protrusions 122 provide double-sided support for the first rotating shaft 42 in the third direction, making the mounting position of the first rotating shaft 42 fixed and reliable, and ensuring that the locking connector 41 is subjected to balanced force during rotation, preventing it from tilting or shaking.

[0026] In some embodiments, such as Figure 6 As shown, the base 12 also includes a first rib 124 connected to the seat body 121. The first rib 124 connects two first protrusions 122 along a third direction. The first rib 124 connects the two first protrusions 122 and the seat body 121 into one unit, which can effectively distribute and transmit the load on the two first protrusions 122, improve the overall structural strength of the base 12, reduce the risk of failure of the first protrusions 122 under stress, and thus improve the connection reliability of the fixing device 100.

[0027] In some embodiments, the abutment portion 15 may be cantilevered (not shown in the figure). That is, one end of the abutment portion 15 is connected to the frame body 14 in the second direction, and the other end extends out in the air. This cantilever structure is relatively simple and easy to manufacture.

[0028] Please see Figure 4 , Figure 5In some embodiments, the main frame 11 further includes two second protruding ribs 16 connected to the frame body 14. Both second protruding ribs 16 extend along a first direction and are located on the same side of the frame body 14 in a second direction as the abutment portion 15. The two second protruding ribs 16 are respectively connected to the two ends of the abutment portion 15 in a third direction, and together with the frame body 14 and the abutment portion 15, form a second mounting groove 161 and a third mounting groove 162. The first mounting groove 152 communicates with the second mounting groove 161 and the third mounting groove 162 along the first direction. In the locked state, the two first protrusions 122 and the first protruding ribs 124 are accommodated in the second mounting groove 161, and at least a portion of the second rotating shaft 44 and the first locking member 43 are accommodated in the third mounting groove 162. By providing second protruding ribs 16 on both sides of the abutment portion 15 in the third direction, on the one hand, the abutment portion 15 has a support structure on both sides in the third direction, which makes the connection strength of the abutment portion 15 higher and helps to improve the connection reliability of the fixing device 100; on the other hand, the second mounting groove 161 and the third mounting groove 162 formed by the second protruding ribs 16, the frame body 14 and the abutment portion 15 can provide third-direction side protection for the locking connector 41 and the first locking member 43, making the locking assembly 40 less likely to be accidentally unlocked due to lateral contact, which helps to further improve the connection reliability of the fixing device 100.

[0029] In some embodiments, such as Figure 6 As shown, the base 12 also includes a second protrusion 123 connected to the seat body 121. The second protrusion 123 and the two first protrusions 122 are located on the same side of the seat body 121. The frame body 14 is provided with a fourth mounting groove 141. The second protrusion 123 is accommodated in the fourth mounting groove 141 and is rotatably connected to the frame body 14. By rotatably connecting the second protrusion 123 to the frame body 14 through accommodating the fourth mounting groove 141, the hinge structure between the base 12 and the frame body 14 is embedded inside the frame body 14, rather than having an additional hinge component protruding from the outside of the frame body 14. This reduces the size of the fixing device 100, which is beneficial for miniaturization and structural compactness of the fixing device 100.

[0030] Please see Figure 3 , Figure 7In some embodiments, the first locking member 43 includes an operating part 431 and two third protrusions 432 connected to the operating part 431. The two third protrusions 432 are spaced apart along a third direction, and the two ends of the second rotating shaft 44 are respectively mounted on the two third protrusions 432. The abutment part 15 has a first engaging groove 153 on one side in the first direction. In the locked state, the two third protrusions 432 are respectively engaged in the first engaging groove 153. The two third protrusions 432 provide double-sided support for the second rotating shaft 44 in the third direction, making the installation of the second rotating shaft 44 more reliable. The first locking member 43 is subjected to balanced force during rotation, and is not prone to tilting or shaking.

[0031] In some embodiments, such as Figure 2 , Figure 3 , Figure 7 , Figure 8 As shown, the locking assembly 40 also includes a second locking member 45, which is disposed on the main frame 11. In the locked state, the second locking member 45 is configured to engage with the first locking member 43 to restrict the operation part 431 from rotating away from the second protrusion 123 in the second direction. The engagement between the second locking member 45 and the first locking member 43 adds a locking mechanism to the fixing device 100 on the basis of tension self-locking, further enhancing the connection reliability.

[0032] Please see Figure 3 , Figure 7 , Figure 8 In some embodiments, the first locking member 43 further includes a engaging portion 433 connected to the operating portion 431. The second locking member 45 includes a hook lock 452 and a third rotating shaft 451 connected to the hook lock 452. The two ends of the third rotating shaft 451 are rotatably mounted on two second protruding ribs 16, respectively. The hook lock 452 is disposed in a third mounting groove 162, and one end of the hook lock 452 is provided with a second engaging groove 456. In the locked state, the engaging portion 433 is located in the second direction on the side of the operating portion 431 facing the second protrusion 123; one end of the engaging portion 433 near the third protrusion 432 in the first direction is connected to the operating portion 431, and the other end is inserted into the second engaging groove 456. When the connecting seat 30 is pulled, the first locking member 43 tends to move towards the main frame 11, achieving self-locking. At this time, the hook lock 452 does not tend to separate from the first locking member 43. The hook lock 452 mainly serves as an auxiliary locking mechanism to prevent the first locking member 43 from flipping and unlocking due to vibration or accidental contact, thereby ensuring connection reliability. The hook lock 452 is rotatably mounted on the two second protruding ribs 16 via the third rotating shaft 451. When unlocking is required, simply rotate the third rotating shaft 451 to disengage the hook lock 452 from the engaging part 433, thus releasing the first locking member 43. The operation is convenient and quick.

[0033] In some embodiments, such as Figure 3, Figure 7 , Figure 8 As shown, the first locking member 43 also includes two third protruding ribs 434 connected to the operating part 431. The two third protruding ribs 434 are respectively connected to the opposite ends of the engaging part 433 in the third direction. The two third protruding ribs 434 are respectively provided with guide slopes 435 on the side away from the third protrusion 432. The hook lock 452 includes a hook-shaped part 454 and a limiting part 455 connected to the hook-shaped part 454. A second engaging groove 456 is provided in the hook-shaped part 454, and a third rotating shaft 451 is connected to the limiting part 455. The dimension of the limiting part 455 in the third direction is smaller than the dimension of the hook-shaped part 454 in the third direction, and the dimension of the limiting part 455 in the third direction is smaller than the distance between the two third protruding ribs 434 in the third direction. In the locked state, the end of the limiting part 455 away from the hook-shaped part 454 abuts against the frame body 14, and a part of the limiting part 455 is located between the two third protruding ribs 434. When the operating part 431 is subjected to an external pulling force in the second direction, the frame body 14 restricts the rotation of the limiting part 455, thereby restricting the operating part 431 from moving away from the second protrusion 123 in the second direction. Even if it is subjected to an outward pulling force, the hook lock 452 cannot disengage from the first locking member 43, which helps to improve the reliability of locking.

[0034] Please see Figure 3 , Figure 7 , Figure 8 In some embodiments, the guide ramp 435 is configured to guide the engaging portion 433 into the second engaging groove 456, so that a locking engagement is formed between the second locking member 45 and the first locking member 43. The guide ramp 435 is also configured to guide the operating portion 431 to slide away from the second protrusion 123 after the locking engagement is released. The guide ramp 435 can guide the second locking member 45 and the first locking member 43 to form a locking engagement, making the locking operation more effortless; the guide ramp 435 can also push the first locking member 43 away from the frame 14, making the unlocking operation more convenient.

[0035] In some embodiments, such as Figure 8 As shown, the second locking member 45 also includes a knob 453 and a reset member (not shown in the figure). There can be two knobs 453, each connected to one end of the third rotating shaft 451 in the third direction, to increase the torque arm when operating the third rotating shaft 451, making operation easier. The reset member is installed between the main frame 11 and the third rotating shaft 451 to reset the third rotating shaft 451, ensuring that the end of the limiting part 455 away from the hook-shaped part 454 always abuts against the frame 14 when not subjected to external force, preventing accidental unlocking and further improving connection reliability. For example, the reset member can be a torsion spring.

[0036] The above description is only a part of the embodiments of this application and does not limit the scope of protection of this application. Any equivalent device or equivalent process transformation made based on the content of this application specification and drawings, or direct or indirect application in other related technical fields, are similarly included in the patent protection scope of this application.

Claims

1. A fixing device, characterized in that, include: The clamp assembly includes a main frame and a base, wherein the main frame is provided with an abutment surface; The base has a connecting end and a locking end spaced apart. The connecting end is rotatably connected to the main frame. The base has a locked state and an unlocked state. In the locked state, the locking end is detachably locked to the main frame. The base and the main frame enclose a receiving space for accommodating external fasteners. A connecting seat is disposed along a first direction on the side of the base away from the main frame and connected to the base. The connecting seat is used for connecting external devices along the first direction. A locking assembly includes a locking connector, a first locking member, a first rotating shaft, and a second rotating shaft. One end of the locking connector is connected to the base via the first rotating shaft, and the other end is connected to the first locking member via the second rotating shaft. In the locked state, the end of the first locking member near the first rotating shaft abuts against the abutting surface; the main frame, the first locking member, the first rotating shaft, and the second rotating shaft are configured such that when the connecting seat is pulled, the other end of the first locking member away from the first rotating shaft tends to move toward the main frame.

2. The fixing device according to claim 1, characterized in that, In the locked state, when the connecting seat is pulled, the first locking member has a tendency to rotate about a preset rotation axis; In a reference section perpendicular to the first and second rotating shafts, the axis of rotation is located on the side away from the connecting end of the reference line connecting the center of the first and second rotating shafts.

3. The fixing device according to claim 2, characterized in that, The contact surface is a portion of a cylindrical surface; The axis of rotation coincides with the central axis of the cylindrical surface and is parallel to the second axis of rotation.

4. The fixing device according to claim 2, characterized in that, Within the reference section, in a second direction perpendicular to the first direction, the second rotating shaft is closer to the connection end relative to the first rotating shaft.

5. The fixing device according to claim 4, characterized in that, In the locked state, at least a portion of the end of the locking connector connected to the second rotating shaft protrudes toward the connecting end in the second direction relative to the other end connected to the first rotating shaft, so that the connection position of the second rotating shaft and the locking connector is closer to the connecting end relative to the connection position of the first rotating shaft and the locking connector.

6. The fixing device according to claim 5, characterized in that, The main frame includes a frame body and an abutment portion. The frame body is used to enclose the accommodating space with the base. The abutment portion is disposed on one side of the frame body along the second direction. The abutment portion is provided with a first mounting groove, and the abutment surface is disposed on the abutment portion. In the locked state, a portion of the locking connector located between the first rotating shaft and the second rotating shaft is embedded in the first mounting groove, and the abutting portion engages with the first locking member on both sides in the third direction.

7. The fixing device according to claim 6, characterized in that, The base includes a base body and two first protrusions connected to the base body. The two first protrusions are spaced apart along the third direction, and the two ends of the first rotating shaft are respectively installed on the two first protrusions. The base also includes a first rib connected to the seat body, and the first rib connects the two first protrusions along the third direction.

8. The fixing device according to claim 7, characterized in that, The main frame also includes two second protruding ribs connected to the frame body. Both second protruding ribs extend along the first direction and are located on the same side of the frame body in the second direction as the abutting part. The two second protruding ribs are respectively connected to the two ends of the abutting part in the third direction and together with the frame body and the abutting part, they form a second mounting groove and a third mounting groove. The first mounting groove communicates with the second mounting groove and the third mounting groove along the first direction. In the locked state, the two first protrusions and the first rib are accommodated in the second mounting groove, and at least a portion of the second rotating shaft and the first locking member are accommodated in the third mounting groove.

9. The fixing device according to claim 8, characterized in that, The base also includes a second protrusion connected to the seat body, the second protrusion being located on the same side of the seat body as the two first protrusions; The frame body is provided with a fourth mounting groove, and the second protrusion is accommodated in the fourth mounting groove and rotatably connected to the frame body.

10. The fixing device according to claim 9, characterized in that, The first locking member includes an operating part and two third protrusions connected to the operating part. The two third protrusions are spaced apart along the third direction, and the two ends of the second rotating shaft are respectively mounted on the two third protrusions. The abutting part has a first locking groove on one side in the first direction. In the locked state, the two third protrusions are respectively engaged with the first locking groove.

11. The fixing device according to claim 10, characterized in that, The locking assembly further includes a second locking member, which is disposed on the main frame; In the locked state, the second locking member is configured to engage with the first locking member to restrict the operating part from rotating away from the second protrusion in the second direction.

12. The fixing device according to claim 11, characterized in that, The first locking member further includes a locking portion connected to the operating part; The second locking component includes a hook lock and a third rotating shaft connected to the hook lock. The two ends of the third rotating shaft are rotatably mounted on the two second protruding ribs, and the hook lock is disposed in the third mounting groove. One end of the hook lock is provided with a second snap-fit ​​groove. In the locked state, the engaging portion is located on the side of the operating portion facing the second protrusion in the second direction; one end of the engaging portion near the third protrusion in the first direction is connected to the operating portion, and the other end is inserted into the second engaging slot.

13. The fixing device according to claim 12, characterized in that, The first locking member also includes two third protruding ribs connected to the operating part. The two third protruding ribs are respectively connected to the opposite ends of the engaging part in the third direction. The two third protruding ribs are respectively provided with guide slopes on the side away from the third protrusion. The hook lock includes a hook-shaped portion and a limiting portion connected to the hook-shaped portion. A second locking groove is disposed on the hook-shaped portion. The third rotating shaft is connected to the limiting portion. The dimension of the limiting portion along the third direction is smaller than the dimension of the hook-shaped portion along the third direction, and the dimension of the limiting portion along the third direction is smaller than the distance between the two third protruding ribs in the third direction. In the locked state, the end of the limiting portion away from the hook-shaped portion abuts against the frame body, and a portion of the limiting portion is located between the two third protruding ribs. The guide slope is configured to guide the engaging portion to slide into the second engaging groove, so that the second locking member and the first locking member form an engaging engagement; the guide slope is also configured to guide the operating portion to slide away from the second protrusion after the engaging engagement is released.

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