Fixing assembly

By designing a meshing connection fixing component, the problem of gear damage during the maintenance of the shredder clutch was solved, achieving stable gear fixing and extended service life, thereby improving the working performance and maintenance efficiency of the shredder.

CN224140157UActive Publication Date: 2026-04-21LONGYAN CIGARETTE FACTORY
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
LONGYAN CIGARETTE FACTORY
Filing Date
2025-03-27
Publication Date
2026-04-21

AI Technical Summary

Technical Problem

During the maintenance or replacement of the clutch of a shredder, using tools such as screwdrivers to jam the gears can cause scratches and wear on the gear surface, affecting the gear's precision and service life, and consequently affecting the working performance of the shredder.

Method used

Design a fixing component, including a meshing component, a first fixing component, and a second fixing component. The fixing component is switched between different states by a gear to achieve the clamping and fixing of the gear, avoiding the use of tools to directly contact the gear, and fixing is achieved by meshing connection and abutment method.

Benefits of technology

It reduces damage to gears, increases gear lifespan and overall performance of the shredder, simplifies operation, and improves maintenance efficiency.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model relates to a fixing assembly. The fixing assembly comprises a meshing piece, a first fixing piece and a second fixing piece. The meshing piece is provided with a plurality of first meshing teeth arranged at intervals. The first fixing piece is connected to the meshing piece. The second fixing piece is connected to the meshing piece. The fixing assembly has a first state and a second state; in the first state and the second state, part of the first meshing teeth are meshed with the gear; the gear is used for driving the fixing assembly to rotate, so that the fixing assembly is switched between a first state and a second state; in the first state, the first fixing piece and the rack are arranged at an interval, and the second fixing piece and the rack are arranged at an interval; in the second state, at least one of the first fixing piece and the second fixing piece abuts against the rack in the rotating direction of the gear. According to the fixing assembly, damage to the gear during maintenance and replacement of the transmission part can be reduced, the service life of the gear can be prolonged, and the use performance of the tobacco equipment is improved.
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Description

Technical Field

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

[0002] In the tobacco production process, the shredder is a key piece of equipment on the cigarette shredding production line. The function of the shredder is to cut the processed tobacco leaves or stems into leaf or stem shreds of a certain width that meet the requirements of the shredding process.

[0003] In the feeding device of a shredder, the disassembly and assembly of the clutch is a necessary operation for equipment maintenance and parts replacement. This process requires the gear connected to the clutch to be securely engaged; otherwise, damage to the gear and its connected components will occur. In related technologies, during clutch maintenance or replacement, tools such as screwdrivers are used to engage the gear, thereby achieving gear engagement and fixation.

[0004] However, during operation, tools such as screwdrivers can cause scratches and wear on the surface of the gears, affecting the gears' precision and service life, and consequently affecting the overall working performance of the shredder. Utility Model Content

[0005] Therefore, it is necessary to provide a fixing component to solve the problem that when the clutch in a shredder is maintained or replaced, the gear is jammed by tools such as screwdrivers, causing scratches, wear and other damage to the surface of the gear, affecting the gear's accuracy and service life, and thus affecting the overall working performance of the shredder.

[0006] A fixed assembly is used for a transmission device, the transmission device including a frame and a transmission component; the frame encloses a cavity, and the transmission component is disposed within the cavity; the transmission component includes a gear and a transmission element, the gear and the transmission element being coaxially and detachably connected; the fixed assembly includes:

[0007] The meshing component has a plurality of first meshing teeth arranged at intervals;

[0008] The first fixing member is located on one side of the engaging member along the first direction and is connected to the engaging member;

[0009] The second fixing member is located on the other side of the engaging member along the first direction and is connected to the engaging member;

[0010] The fixing component includes a first state and a second state; in both the first and second states, a portion of the first teeth are meshed with a gear; the gear is used to drive the fixing component to rotate, so that the fixing component switches between the first and second states.

[0011] In the first state, the first fixing member is spaced apart from the frame, and the second fixing member is spaced apart from the frame;

[0012] In the second state, at least one of the first and second fixing members abuts against the frame in the direction of gear rotation.

[0013] In some embodiments, the meshing element is configured as a rack, with a plurality of first teeth spaced apart along a first direction.

[0014] In some embodiments, the fixing component further includes:

[0015] A third fixing member is disposed between the first fixing member and the second fixing member, and the third fixing member is connected to the first fixing member and the second fixing member; the first fixing member, the third fixing member and the second fixing member form an opening.

[0016] The engaging member is located on the side of the third fixing member facing the opening, and the first tooth is located on the side of the engaging member away from the third fixing member.

[0017] In some embodiments, the rack can be detachably connected to the first fixing member, the second fixing member, and the third fixing member.

[0018] In some embodiments, the dimension of the rack along the second direction is smaller than the dimension of the third fastener along the second direction;

[0019] The second direction intersects with both the first direction and the direction of the opening.

[0020] In some embodiments, the transmission assembly further includes a limiting member disposed on the side of the gear away from the transmission assembly, and the limiting member is connected to the gear.

[0021] In the first and second states, the limiting member is located on the side of the third fixing member facing the opening, and the limiting member and the first teeth of the engaging member are spaced apart.

[0022] In some embodiments, along the first direction, the size of the opening portion is smaller than the size of the bottom wall of the opening.

[0023] In some embodiments, along the direction of the opening, the dimension between the sidewall of the first fastener facing the second fastener and the sidewall of the first fastener away from the second fastener gradually increases, and the dimension between the sidewall of the second fastener facing the first fastener and the sidewall of the second fastener away from the first fastener gradually decreases.

[0024] In some embodiments, in the first and second states, there is a gap between the gear and the sidewall of the first fixing member facing the second fixing member; and / or

[0025] There is a gap between the gear and the sidewall of the second fixing member facing the first fixing member.

[0026] In some embodiments, the meshing member further includes a plurality of second teeth spaced apart along a first direction, the plurality of second teeth being disposed on one side of the plurality of first teeth along the first direction;

[0027] The tooth spacing between two adjacent second teeth is smaller than the tooth spacing between two adjacent first teeth.

[0028] The aforementioned fixing assembly is used in a transmission device, which includes a frame and a transmission component. The frame encloses a cavity, and the transmission component is disposed within the cavity. The transmission component includes a gear and a transmission element, which are coaxially and detachably connected. The fixing assembly includes a meshing element, a first fixing element, and a second fixing element. The meshing element has a plurality of first teeth arranged at intervals. The first fixing element is located on one side of the meshing element along a first direction and is connected to the meshing element. The second fixing element is located on the other side of the meshing element along the first direction and is connected to the meshing element. The fixing assembly includes a first state and a second state; in both the first and second states, some of the first teeth are meshed with the gear; the gear is used to drive the fixing assembly to rotate, so that the fixing assembly switches between the first and second states; in the first state, the first fixing element and the frame are spaced apart, and the second fixing element and the frame are also spaced apart; in the second state, at least one of the first fixing element and the second fixing element abuts against the frame along the rotation direction of the gear.

[0029] In this application, the fixing component, in both a first state and a second state, has a portion of its first teeth meshing with a gear. The gear drives the fixing component to rotate, allowing it to switch between the first and second states. In the first state, a first fixing member and a second fixing member are spaced apart from each other on the frame. Rotating the gear drives the fixing component to rotate, thus switching the fixing component from the first state to the second state. At least one of the first and second fixing members abuts against the frame along the rotation direction of the gear. Because at least one of the first and second fixing members abuts against the frame along the rotation direction of the gear, during maintenance or replacement of the transmission component, the fixing component applies the same force to the gear along the aforementioned rotation direction, ensuring the gear is locked and fixed during maintenance or replacement. It is understood that since tools such as screwdrivers are not needed to engage the gear during maintenance or replacement of the transmission component, damage to the gear during maintenance or replacement can be reduced, increasing the gear's lifespan and thus improving the performance of the tobacco equipment. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of the structure of the fixing component in one embodiment of this application.

[0031] Figure 2 This is a structural schematic diagram of the fixed component in one embodiment of this application from another perspective.

[0032] Explanation of reference numerals in the attached figures:

[0033] 1. Fixed components;

[0034] 11. Engaging component; 12. First fixing component; 13. Second fixing component; 14. Third fixing component; 15. Opening. Detailed Implementation

[0035] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0036] In the description of this application, it should be understood that if terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application 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, and therefore should not be construed as a limitation of this application.

[0037] Furthermore, where the terms "first" and "second" appear, these terms are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, where the term "multiple" appears, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0038] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0039] In this application, unless otherwise expressly specified and limited, the use of descriptions such as "above" or "below" the second feature indicates that the first and second features are in direct contact or indirect contact via an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. Similarly, "below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0040] See Figure 1 and Figure 2 As shown. One embodiment of this application provides a fixing component 1 for a transmission device. The transmission device includes a frame and a transmission assembly. The frame encloses a cavity, and the transmission assembly is disposed within the cavity. The transmission assembly includes a gear and a transmission component, which are coaxially and detachably connected. The fixing component 1 includes a meshing member 11, a first fixing member 12, and a second fixing member 13. The meshing member 11 has a plurality of first teeth arranged at intervals. The first fixing member 12 is disposed on one side of the meshing member 11 along a first direction and connected to the meshing member 11. The second fixing member 13 is disposed on the other side of the meshing member 11 along the first direction and connected to the meshing member 11. The fixing component 1 includes a first state and a second state; in both the first and second states, a portion of the first teeth are meshed with the gear; the gear is used to drive the fixing component 1 to rotate, so that the fixing component 1 switches between the first and second states; in the first state, the first fixing member 12 is spaced apart from the frame, and the second fixing member 13 is spaced apart from the frame; in the second state, at least one of the first fixing member 12 and the second fixing member 13 abuts against the frame along the rotation direction of the gear.

[0041] It should be noted that the first direction in this application is... Figure 1 The X direction in the equation.

[0042] It should be further noted that the fixing component 1 in this application can be applied to any transmission device, and the transmission components in this transmission device include coaxially detachably connected gears and transmission elements. Specifically, the transmission device in this application can be applied to tobacco equipment, which can be a shredder, cigarette rolling machine, or other tobacco-related machinery. The transmission device in this application can be the feeding device in a shredder, and the transmission element can be a clutch or other mechanical structure. Of course, the transmission device in this application can also be applied to other mechanical equipment, and the transmission device in this application can also be other mechanical devices. Here, this application does not limit the specific type of transmission device or the specific type of transmission element.

[0043] For example, this application uses a transmission device applied to a shredder, where the transmission device refers to the feeding device in the shredder and the transmission component refers to the clutch in the feeding device.

[0044] The transmission assembly is housed within the cavity formed by the frame, with gears and transmission components coaxially and detachably connected. It should be noted that the cavity contains numerous components, resulting in limited free space. During maintenance or replacement of the transmission components, this limited space makes it impossible to directly secure the gears connected to the transmission components. Furthermore, any movement of the gears during maintenance or replacement could damage the gears and connected components.

[0045] Specifically, during the maintenance or replacement of transmission components, the fixing component 1 of this application is placed within the confined space formed by the frame. A portion of the first teeth in the fixing component 1 are engaged with the gear. At this time, the fixing component 1 is in a first state, with the first fixing member 12 spaced apart from the frame, and the second fixing member 13 spaced apart from the frame. Rotating the gear drives the fixing component 1 to rotate, thus switching the fixing component 1 from the first state to the second state. At least one of the first fixing member 12 and the second fixing member 13 abuts against the frame along the rotation direction of the gear. Because at least one of the first fixing member 12 and the second fixing member 13 abuts against the frame along the rotation direction of the gear, during the maintenance or replacement of the transmission components, the fixing component 1 applies the same force to the gear along the aforementioned rotation direction, thereby ensuring the gear is locked and fixed during the maintenance or replacement of the transmission components.

[0046] Furthermore, since the gears do not need to be contacted with tools such as screwdrivers during the entire maintenance or replacement of transmission components, the damage to the gears during maintenance or replacement can be reduced, thereby increasing the service life of the gears and improving the performance of tobacco equipment.

[0047] Furthermore, due to the meshing connection between the first tooth and the gear in the fixing component 1, and the abutment of the first fixing member 12, the second fixing member 13 and the frame, the gear can be clamped and fixed. The part that directly contacts the gear is connected by meshing, and there is no hard contact with the surface of the gear, which can avoid scratches and wear damage to the gear, and can ensure the accuracy and service life of the gear. This can ensure the stability of the working performance of the shredder and ensure that the shredding quality of the shredder meets the standards.

[0048] Meanwhile, since the fixing component 1 of this application only involves the first fixing member 12, the second fixing member 13 and the engaging member 11, the fixing component 1 has fewer parts, the structure of the fixing component 1 is simple and the design is ingenious. It can adapt to the narrow space inside the frame, and in the operation process, it only needs to drive the fixing component 1 to rotate through the gear. The overall operation process is simple, which can effectively reduce the difficulty of operation, shorten the time cost of operation process, and significantly improve the efficiency of tobacco equipment maintenance.

[0049] In some embodiments, the meshing member 11 is configured as a rack, with a plurality of first teeth spaced apart along a first direction.

[0050] Thus, since the meshing element 11 is configured as a rack, on the one hand, the structural design of the meshing element 11 can be simplified, facilitating the meshing and engagement between the meshing element 11 and the gear. Simultaneously, it can reduce the damage caused by the rack to the gear, further extending the gear's service life. On the other hand, the rack is easier to install and connect with the first fixing element 12 and the second fixing element 13, thereby facilitating the production of the fixing assembly 1 and simplifying the overall structural design of the fixing assembly 1, making it easier for operators to use.

[0051] In some embodiments, the fixing assembly 1 further includes a third fixing member 14. The third fixing member 14 is disposed between the first fixing member 12 and the second fixing member 13, and is connected to the first fixing member 12 and the second fixing member 13; the first fixing member 12, the third fixing member 14, and the second fixing member 13 surround and form an opening 15. An engaging member 11 is disposed on the side of the third fixing member 14 facing the opening 15, and a first meshing tooth is disposed on the side of the engaging member 11 away from the third fixing member 14.

[0052] Thus, since the fixing component 1 also includes a third fixing member 14, which is located between the first fixing member 12 and the second fixing member 13 and is connected to the first fixing member 12 and the second fixing member 13; the first fixing member 12, the third fixing member 14 and the second fixing member 13 surround and form an opening 15, the third fixing member 14 can further protect the engaging member 11, thereby protecting the engaging member 11 from external damage during use, and thus improving the service life of the fixing component 1.

[0053] In some embodiments, the rack can be detachably connected to the first fixing member 12, the second fixing member 13, and the third fixing member 14.

[0054] Thus, since the rack is detachably connected to the first fixing member 12, the second fixing member 13, and the third fixing member 14, the installation process between the rack and these members is convenient. Furthermore, when the gears are of different models and types, the rack can be replaced with one that matches the corresponding gear by disassembling it. This improves the practicality of the fixing assembly 1, allowing for the clamping and fixing of different types of gears during maintenance or replacement of transmission components.

[0055] In some embodiments, the dimension of the rack along the second direction is smaller than the dimension of the third fixing member 14 along the second direction. The second direction intersects both the first direction and the direction of the opening 15.

[0056] It should be noted that the second direction in this application is... Figure 1 in the Y direction.

[0057] Thus, since the dimension of the rack along the second direction is smaller than the dimension of the third fixing member 14 along the second direction, the rack does not completely cover the third fixing member 14. This means the side of the third fixing member 14 facing the rack has a partially exposed area, which, together with the sidewall of the rack, forms a stepped structure. On one hand, this stepped structure can abut against the structure connected to the gear in the transmission assembly, thereby achieving further indirect clamping and fixing of the gear. On the other hand, this stepped structure facilitates the operator's grip, preventing injury to the operator from the first meshing tooth of the engaging member 11.

[0058] In some embodiments, the transmission assembly further includes a limiting member disposed on the side of the gear away from the transmission member, and the limiting member is connected to the gear. In the first state and the second state, the limiting member is disposed on the side of the third fixing member 14 facing the opening 15, and the limiting member is spaced apart from the first meshing tooth of the meshing member 11.

[0059] Thus, since the transmission assembly also includes a limiting member, which is located on the side of the gear away from the transmission component and connected to the gear, the limiting member can limit and protect the gear, thereby ensuring the tightness of the connection between the gear and the transmission component. Furthermore, since in the first and second states, the limiting member is located on the side of the third fixing member 14 facing the opening 15, and the limiting member is spaced apart from the first meshing tooth of the meshing member 11, the gear can be indirectly clamped and fixed by the step structure formed above and the limiting member during maintenance or replacement of the transmission component. This ensures the stability and reliability of the gear fixation during maintenance or replacement of the transmission component.

[0060] In some embodiments, along the first direction, the size of the opening 15 is smaller than the size of the bottom wall of the opening 15.

[0061] Thus, since the size of the opening 15 is smaller than the size of the bottom wall of the opening 15 along the first direction, it is easier to fix the component 1 into the narrow space inside the frame, thereby facilitating the operation of the operator.

[0062] In some embodiments, along the direction of the opening 15, the dimension between the sidewall of the first fixing member 12 facing the second fixing member 13 and the sidewall of the first fixing member 12 away from the second fixing member 13 gradually increases, and the dimension between the sidewall of the second fixing member 13 facing the first fixing member 12 and the sidewall of the second fixing member 13 away from the first fixing member 12 gradually decreases.

[0063] In this way, in a confined space, when the gaps between the frame and the first fixing member 12 and the second fixing member 13 are small and it is inconvenient for the fixing component 1 to enter the frame, the size between the side wall of the second fixing member 13 facing the first fixing member 12 and the side wall of the second fixing member 13 away from the first fixing member 12 gradually decreases. That is, the size of the part of the second fixing member 13 that enters the frame beforehand is smaller. This allows part of the second fixing member 13 to enter the confined space first. Then, by adjusting the relative position of the fixing component 1, the smooth entry of the first fixing member 12 is ensured, so that the fixing component 1 can be conveniently in the first state, thereby facilitating the clamping and fixing of the gear by the fixing component 1.

[0064] Furthermore, since the dimension between the sidewall of the first fixing member 12 facing the second fixing member 13 and the sidewall of the first fixing member 12 away from the second fixing member 13 gradually increases, the first fixing member 12 can have a larger contact area with the frame during the contact process between the first fixing member 12 and the frame, thereby ensuring the stability and reliability of the gear clamping and fixing.

[0065] In some embodiments, in the first state and the second state, there is a gap between the gear and the sidewall of the first fixing member 12 facing the second fixing member 13.

[0066] In this way, in both the first and second states, contact between the gear and the first fixing member 12 can be avoided, thereby preventing damage to the gear and the first fixing member 12. This can improve the service life of both the gear and the fixing component 1.

[0067] In some embodiments, in the first state and the second state, there is a gap between the gear and the sidewall of the second fixing member 13 facing the first fixing member 12.

[0068] In this way, in both the first and second states, contact between the gear and the second fixing member 13 can be avoided, thereby preventing damage to the gear and the second fixing member 13. This can improve the service life of both the gear and the fixing component 1.

[0069] In some embodiments, the meshing member 11 further includes a plurality of second teeth spaced apart along a first direction, the plurality of second teeth being disposed on one side of the plurality of first teeth along the first direction. The tooth spacing between two adjacent second teeth is smaller than the tooth spacing between two adjacent first teeth.

[0070] Thus, since the tooth spacing between two adjacent second teeth is smaller than the tooth spacing between two adjacent first teeth, when the gears are of different models and types, it is only necessary to mesh the gears with the corresponding matching first or second teeth. Therefore, without replacing the meshing part 11, different gears can be meshed and connected, thereby achieving the clamping and fixing of gears of different models and types, which can facilitate the operation of operators.

[0071] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0072] The above embodiments merely illustrate several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A stationary assembly for a transmission, said transmission comprising a housing and a transmission assembly; said housing enclosing a cavity, said transmission assembly being disposed within said cavity; said transmission assembly comprising a gear and a transmission member, said gear and said transmission member being coaxially detachably connected; characterized in that, The fixing component includes: The meshing component has a plurality of first meshing teeth arranged at intervals; A first fixing member is disposed on one side of the engaging member along the first direction and connected to the engaging member; The second fixing member is disposed on the other side of the engaging member along the first direction and is connected to the engaging member; The fixing component includes a first state and a second state; in the first state and the second state, a portion of the first teeth are engaged with the gear; the gear is used to drive the fixing component to rotate, so that the fixing component switches between the first state and the second state. In the first state, the first fixing member is spaced apart from the frame, and the second fixing member is spaced apart from the frame; In the second state, at least one of the first fixing member and the second fixing member abuts against the frame in the rotation direction of the gear.

2. The fixture assembly of claim 1, wherein, The meshing element is configured as a rack, with a plurality of the first meshing teeth arranged at intervals along the first direction.

3. The fixture assembly of claim 2, wherein, The fixing component also includes: A third fixing member is disposed between the first fixing member and the second fixing member, and the third fixing member is connected to the first fixing member and the second fixing member; the first fixing member, the third fixing member, and the second fixing member form an opening. The engaging member is located on the side of the third fixing member facing the opening, and the first tooth is located on the side of the engaging member away from the third fixing member.

4. The fixture assembly of claim 3, wherein, The rack can be detachably connected to the first fixing member, the second fixing member, and the third fixing member.

5. The fixture assembly of claim 3, wherein, The dimension of the rack along the second direction is smaller than the dimension of the third fixing member along the second direction; The second direction intersects both the first direction and the direction of the opening.

6. The fixing component according to claim 5, characterized in that, The transmission assembly further includes a limiting member, which is disposed on the side of the gear away from the transmission assembly and is connected to the gear. In the first state and the second state, the limiting member is located on the side of the third fixing member facing the opening, and the limiting member is spaced apart from the first meshing tooth of the engaging member.

7. A fixture assembly according to any one of claims 3-6, characterized in that Along the first direction, the size of the opening is smaller than the size of the bottom wall of the opening.

8. The fixture assembly of any one of claims 3-6, wherein, Along the direction of the opening, the dimension between the sidewall of the first fastener facing the second fastener and the sidewall of the first fastener away from the second fastener gradually increases, and the dimension between the sidewall of the second fastener facing the first fastener and the sidewall of the second fastener away from the first fastener gradually decreases.

9. The fixture assembly of any one of claims 1-6, wherein, In both the first and second states, there is a gap between the gear and the sidewall of the first fixing member facing the second fixing member; and / or There is a gap between the gear and the sidewall of the second fixing member facing the first fixing member.

10. The fixture assembly of any one of claims 2-6, wherein, The meshing component further includes a plurality of second teeth arranged at intervals along the first direction, wherein the plurality of second teeth are disposed on one side of the plurality of first teeth along the first direction; The tooth spacing between two adjacent second teeth is smaller than the tooth spacing between two adjacent first teeth.