Air conditioning equipment

Abstract

The utility model relates to air conditioning equipment which comprises an equipment shell and at least one filter screen structure, at least one air inlet is formed in the equipment shell, and the filter screen structure is arranged at the air inlet; the filter screen structure comprises a filter screen frame and a filter screen body, and the filter screen body is arranged on the filter screen frame; the filter screen frame is provided with at least one slot, at least one insertion strip is arranged at the air inlet, and the insertion strip is used for being inserted into the slot; and / or, the filter screen frame is provided with at least one insertion strip, at least one insertion groove is formed in the air inlet, and the insertion strip is used for being inserted into the insertion groove. Through the matching design of the inserting strips and the inserting grooves, a user can easily install the filter screen structure to the air inlet or detach the filter screen structure from the air inlet, extra tools or complex operation steps are not needed, and the operation convenience is improved.

Description

Technical Field

[0001] This disclosure relates to air conditioning equipment. Background Technology

[0002] Ductless air conditioners, also known as ducted air conditioners or ducted air conditioning systems, are a type of central air conditioning system. They deliver treated air (cooled, heated, purified, etc.) to various rooms or areas through ducts. In ductless air conditioners, the filter structure is a crucial component, responsible for filtering the air entering the system, removing dust, particulate matter, and other impurities, thereby protecting the equipment and improving indoor air quality.

[0003] In related technologies, filter structures are often inconvenient to install and disassemble, resulting in poor convenience. Utility Model Content

[0004] To overcome the problems existing in the related technologies, this disclosure provides an air conditioning device to solve the technical problems existing in the related technologies.

[0005] According to an embodiment of this disclosure, an air conditioning device is provided. The air conditioning device includes a device housing and at least one filter structure. The device housing has at least one air inlet, and the filter structure is disposed at the air inlet. The filter structure includes a filter frame and a filter body, and the filter body is disposed on the filter frame.

[0006] The filter frame is provided with at least one slot, and the air inlet is provided with at least one insert, the insert being used to be inserted into the slot; and / or, the filter frame is provided with at least one insert, and the air inlet is provided with at least one slot, the insert being used to be inserted into the slot.

[0007] In some embodiments, the filter frame is provided with a first slot at a first end along a first direction, and the air inlet is provided with a first insert bar along a first side along the first direction, the first insert bar being inserted into the first slot;

[0008] The filter frame is provided with a second slot at the second end along the first direction, and the air inlet is provided with a second insert on the second side along the first direction. The second insert is used to be inserted into the second slot.

[0009] In some embodiments, the first slot is provided with a plurality of support plates, the plurality of support plates being arranged at intervals in pairs in a second direction, the support plates forming a support groove extending in a first direction and having a first opening, the first insert being able to pass through the first opening and be inserted into the support groove along the first direction; wherein, the first direction and the second direction are intersecting.

[0010] In some embodiments, the support groove includes a first support groove segment and a second support groove segment that are interconnected, wherein the end of the first support groove segment away from the second support groove segment is configured as the first opening;

[0011] Along the first direction and away from the first opening, the diameter of the first support groove gradually decreases, while the diameter of the second support groove remains unchanged.

[0012] In some embodiments, the dimension of the support groove in the first direction is between 5 mm and 12 mm, and the dimension of the support groove in the third direction is between 0.8 mm and 1.6 mm; wherein the first direction, the second direction, and the third direction are arranged to intersect each other.

[0013] In some embodiments, the air inlet is provided with a first support plate extending along the first direction on a first side along the first direction, and at least a portion of the first support plate is configured as the first insert.

[0014] In some embodiments, the filter frame includes a frame body, a first slot plate, and a second slot plate;

[0015] The first slot plate and the second slot plate are connected to the frame body and are located at the second end of the filter frame along the first direction. The first slot plate and the second slot plate extend along the first direction and are spaced apart in a third direction, and together with the frame body, they enclose the second slot; wherein the first direction intersects with the third direction.

[0016] In some embodiments, the air conditioning device further includes at least one fastener, at least one of the first slot plate and the second slot plate having a first fastening hole, and the second insert having at least one second fastening hole, the fastener passing through the first fastening hole and the second fastening hole to connect the second insert to the first slot plate and / or the second slot plate.

[0017] In some embodiments, a limiting block is further provided in the second slot, the limiting block being used to abut against the second insert.

[0018] In some embodiments, the first slot plate has a first fastening hole, and the dimension of the first slot plate in the first direction is greater than the dimension of the second slot plate in the first direction.

[0019] In some embodiments, a second support plate is provided on the second side of the air inlet along the first direction;

[0020] The second support plate includes at least a first plate segment and a second plate segment. The first plate segment extends along a first direction. One side of the first plate segment along the first direction is connected to the equipment housing, and the other side is connected to the second plate segment. The second plate segment extends along the third direction.

[0021] The second plate segment and at least a portion of the first plate segment are configured as the second insert, the first plate segment being able to abut against the first slot plate in the third direction, and the second plate segment being able to abut against the second slot plate in the third direction.

[0022] In some embodiments, the filter frame is further provided with at least one snap-fit ​​block, and the device housing is formed with at least one snap-fit ​​groove near the air inlet, the snap-fit ​​block being used to snap into the snap-fit ​​groove; and / or, the device housing is further provided with at least one snap-fit ​​block near the air inlet, the filter frame is formed with at least one snap-fit ​​groove, the snap-fit ​​block being used to snap into the snap-fit ​​groove.

[0023] In some embodiments, the snap-fit ​​groove includes a first groove segment, a second groove segment, and a third groove segment. The first groove segment and the third groove segment are constructed as straight grooves, and the diameter of the first groove segment is smaller than the diameter of the third groove segment. The second groove segment is constructed as a trapezoidal groove and connects the first groove segment and the third groove segment.

[0024] The snap-fit ​​block is inserted into the snap-fit ​​groove through the third groove segment, and at least partially slides to the first groove segment and abuts against the first groove segment.

[0025] The technical solutions provided by the embodiments of this disclosure may include the following beneficial effects: through the cooperative design of the insert and the slot, users can easily install the filter structure to the air inlet or remove it from the air inlet without additional tools or complicated operating steps, thus improving the convenience of operation.

[0026] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and are not intended to limit this disclosure. Attached Figure Description

[0027] The accompanying drawings, which are incorporated in and form a part of this specification, illustrate embodiments consistent with this disclosure and, together with the description, serve to explain the principles of this disclosure.

[0028] Figure 1 This is a three-dimensional structural diagram of an air conditioning device according to one embodiment of the present disclosure.

[0029] Figure 2 This is a cross-sectional schematic diagram of a portion of the structure of an air conditioning device according to one embodiment of the present disclosure.

[0030] Figure 3 yes Figure 2 A magnified view of a section at point E in the middle.

[0031] Figure 4 yes Figure 2 A magnified view of a section at point F.

[0032] Figure 5 This is a three-dimensional structural diagram of the filter structure of an air conditioning device according to one embodiment of the present disclosure.

[0033] Figure 6 This is a side view of the filter structure of an air conditioning device according to one embodiment of the present disclosure.

[0034] Figure 7 yes Figure 6 A magnified view of a section at point G.

[0035] Figure 8 This is a partial structural schematic diagram of an air conditioning device according to one embodiment of the present disclosure.

[0036] Figure 9 yes Figure 8 A magnified view of a section at point H.

[0037] Figure 10 This disclosure presents a partial structural schematic diagram of an air conditioning device according to one embodiment, wherein the filter structure is not shown in the diagram.

[0038] Figure 11 yes Figure 10 A magnified view of a section at point I.

[0039] Explanation of reference numerals in the attached figures

[0040] 1. Equipment casing; 10. Air inlet; 101. First support plate; 102. Second support plate; 1021. First plate segment; 1022. Second plate segment; 103. Snap-fit ​​groove; 1031. First groove segment; 1032. Second groove segment; 1033. Third groove segment;

[0041] 2. Filter structure; 21. Filter frame; 211. Frame body; 212. First slot plate; 213. Second slot plate; 214. First fastening hole; 22. Filter body;

[0042] 3. Slot; 31. First slot; 311. Support plate; 312. First opening; 313. Support groove; 314. First support groove segment; 315. Second support groove segment; 32. Second slot; 321. Limiting block;

[0043] 4. Insert strip; 41. First insert strip; 42. Second insert strip; 5. Snap-fit ​​block

[0044] A. First direction; B. Second direction; C. Third direction. Detailed Implementation

[0045] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numerals in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this disclosure. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this disclosure as detailed in the appended claims.

[0046] In this disclosure, unless otherwise stated, directional terms such as "first direction," "second direction," and "third direction" refer to three intersecting directions, as detailed in the following references. Figure 5 As shown. The directional terms used, such as "inner" and "outer", refer to the inner and outer parts of the specific structural outline. The terms used, such as "first" and "second", are only used to distinguish one element from another and do not have any order or importance. In addition, "multiple" in this application refers to two or more and includes two.

[0047] In the description of this disclosure, it should also be noted that, unless otherwise expressly specified and limited, the terms "setup" and "connection" 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 direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this disclosure according to the specific circumstances.

[0048] Reference Figures 1 to 11 As shown, this disclosure provides an air conditioning device, which includes a housing 1 and at least one filter structure 2. The housing 1 has at least one air inlet 10, and the filter structure 2 is disposed at the air inlet 10. The filter structure 2 includes a filter frame 21 and a filter body 22, and the filter body 22 is disposed on the filter frame 21.

[0049] The filter frame 21 is provided with at least one slot 3, and the air inlet 10 is provided with at least one insert 4, which is used to be inserted into the slot 3; and / or, the filter frame 21 is provided with at least one insert 4, and the air inlet 10 is provided with at least one slot 3, which is used to be inserted into the slot 3.

[0050] In the above technical solution, through the design of the insert 4 and the slot 3, the user can easily install the filter structure 2 onto the air inlet 10 or remove it from the air inlet 10 without additional tools or complicated operating steps, thus improving the convenience of operation.

[0051] Specifically, slot 3 can be located at air inlet 10, filter frame 21, or both; this disclosure does not limit this. Similarly, insert 4 can be located at air inlet 10, filter frame 21, or both; this disclosure also does not limit this.

[0052] In one implementation, reference is made to Figures 2 to 4 As shown, the filter frame 21 is provided with a first slot 31 at its first end along the first direction A, and the air inlet 10 is provided with a first insert 41 on its first side along the first direction A. The first insert 41 is used to be inserted into the first slot 31. The filter frame 21 is provided with a second slot 32 at its second end along the first direction A, and the air inlet 10 is provided with a second insert 42 on its second side along the first direction A. The second insert 42 is used to be inserted into the second slot 32.

[0053] In this embodiment, by setting a first slot 31 and a second slot 32 at both ends of the filter frame, and setting a first insert 41 and a second insert 42 at the corresponding position of the air inlet, the filter frame is ensured to be stably supported on both sides. This not only enhances the stability of the filter structure 2 after installation, but also effectively prevents the filter from loosening or falling off due to external vibration or airflow impact.

[0054] Secondly, the cooperative design of the slot 3 and the insert 4 provides a clear guiding function, allowing the filter frame 21 to be accurately aligned and inserted into place along the preset direction (i.e., the first direction A) during installation. This precise positioning reduces installation errors, ensures the seal between the filter structure 2 and the air inlet 10, and improves the air purification effect.

[0055] In addition, the double-end fixed structure design is safer and more reliable than the single-end fixed method. Even if one connection point has a problem, the other connection point can still maintain the basic fixed state of the filter structure 2, avoiding the risk of complete detachment in case of accident.

[0056] Optionally, refer to Figures 5 to 7 As shown, the first slot 31 is provided with a plurality of support plates 311, which are arranged in pairs at intervals in the second direction B. The support plates 311 form a support groove 313 extending in the first direction A and having a first opening 312. The first insert 41 can be inserted into the support groove 313 through the first opening 312 and along the first direction A; wherein the first direction A and the second direction B are intersected.

[0057] In this embodiment, multiple support plates 311 are spaced apart in pairs along the second direction B, forming support grooves 313 extending into the first direction A. This structure greatly enhances the rigidity of the first slot 31, enabling the filter frame 21 to withstand greater external pressure or vibration without easily deforming or being damaged. This ensures stability and reliability during long-term use.

[0058] Secondly, the first opening 312 of the support groove 313 provides a clear insertion path, ensuring that the first insert 41 can be accurately inserted into place along the first direction A. The design of multiple support plates 311 also provides additional guidance, making the installation process smoother and less prone to deviation, thereby improving installation accuracy.

[0059] In addition, despite the use of the support groove 313 design, the operator can still easily insert or remove the first insert 41 through the first opening 312, which facilitates the operation and maintains the ease of operation.

[0060] Optionally, refer to Figure 7 As shown, the support groove 313 includes a first support groove segment 314 and a second support groove segment 315 that are interconnected. The end of the first support groove segment 314 away from the second support groove segment 315 is configured as a first opening 312. Along the first direction A and away from the first opening 312, the diameter of the first support groove segment 314 gradually decreases, while the diameter of the second support groove segment 315 remains unchanged.

[0061] First, the end of the first support groove segment 314 furthest from the second support groove segment 315 is constructed as a first opening 312, and its diameter gradually decreases along the first direction A. This tapering design provides a natural guiding effect, allowing the first insert 41 to enter the support groove 313 more smoothly during insertion and accurately reach the predetermined position. This design reduces resistance and deviation during installation and improves installation accuracy.

[0062] Secondly, as the diameter of the first support groove 314 gradually decreases, when the first insert 41 is fully inserted, it will be subject to greater restraint, thereby effectively preventing loosening or falling off due to vibration or external force, and ensuring the stable connection of the filter frame in the working state.

[0063] The two-section design of the support groove 313 not only enhances mechanical strength but also reduces wear through reasonable stress distribution. Even after multiple insertion and removal operations, it maintains good fit accuracy, extending the product's service life.

[0064] Optionally, the dimension of the support groove 313 in the first direction A is between 5 mm and 12 mm, and the dimension of the support groove 313 in the third direction C is between 0.8 mm and 1.6 mm; wherein the first direction A, the second direction B, and the third direction C are arranged to intersect each other. However, this disclosure does not limit the specific dimensions of the support groove 313.

[0065] Reference Figure 3 As shown, the air inlet 10 is provided with a first support plate 101 extending along the first direction A on the first side, and at least part of the first support plate 101 is constructed as a first insert 41.

[0066] A portion of the first support plate 101 is directly constructed as the first insert 41, forming an integrated structure. This design not only simplifies the number of parts and the assembly process but also enhances the rigidity and stability of the entire air inlet structure, reducing the risk of deformation or damage caused by vibration or external forces.

[0067] For example, the first support plate 101 can serve as a supporting sheet metal, possessing a certain degree of mechanical strength. By partially constructing it as the first insert 41, the compressive and bending resistance of this area is further enhanced. Even after repeated insertion and removal operations during long-term use, it can maintain good performance and durability.

[0068] In another embodiment, refer to Figure 4 As shown, the filter frame 21 includes a frame body 211, a first slot plate 212, and a second slot plate 213. The first slot plate 212 and the second slot plate 213 are connected to the frame body 211 and are located at the second end of the filter frame 21 along the first direction A. The first slot plate 212 and the second slot plate 213 extend along the first direction A and are spaced apart in the third direction C, and together with the frame body 211, they form a second slot 32. The first direction A intersects with the third direction C.

[0069] In this embodiment, the first slot plate 212 and the second slot plate 213 extend along the first direction A and are spaced apart in the third direction C, ensuring that the second slot 32 has a clear insertion path and sufficient depth. This not only improves the positioning accuracy of the filter frame during installation but also ensures that the insert 4 can be accurately inserted into place, reducing installation errors.

[0070] Optionally, refer to Figures 5 to 7 As shown, the air conditioning device may also include at least one fastener, at least one of the first slot plate 212 and the second slot plate 213 having a first fastening hole 214, and the second insert 42 having at least one second fastening hole. The fastener passes through the first fastening hole 214 and the second fastening hole to connect the second insert 42 to the first slot plate 212 and / or the second slot plate 213.

[0071] That is, based on the above-mentioned insertion and cooperation of slot 3 and insert 4, in this embodiment, fasteners are also designed. Based on the pre-positioning of slot 3 and insert 4, operators can further connect them by fasteners to improve the stability of the connection and the accuracy of installation.

[0072] Optionally, refer to Figure 4 As shown, a limiting block 321 is also provided in the second slot 32. The limiting block 321 is used to abut against the second insert 42 to limit the depth of the second insert 42 inserted into the second slot 32, thereby preventing the first insert 41 on the other side from falling out of the first slot 31.

[0073] Optionally, the first slot plate 212 is formed with a first fastening hole 214, and the dimension of the first slot plate 212 in the first direction A is larger than the dimension of the second slot plate 213 in the first direction A, so as to facilitate assembly.

[0074] Optionally, refer to Figure 4 As shown, a second support plate 102 is provided on the second side of the air inlet 10 along the first direction A; the second support plate 102 includes at least a first plate segment 1021 and a second plate segment 1022. The first plate segment 1021 extends along the first direction A, and one side of the first plate segment 1021 along the first direction A is connected to the equipment housing 1, and the other side is connected to the second plate segment 1022. The second plate segment 1022 extends along the third direction C; the second plate segment 1022 and at least a portion of the first plate segment 1021 are configured as a second insert 42. The first plate segment 1021 can abut against the first slot plate 212 in the third direction C, and the second plate segment 1022 can abut against the second slot plate 213 in the third direction C.

[0075] The first plate segment 1021 can abut against the first slot plate 212 in the third direction C, while the second plate segment 1022 can abut against the second slot plate 213 in the third direction C. This multi-point contact design not only provides a wider support surface, but also forms a clamping effect, further enhancing the snap-fit ​​reliability between the filter frame 21 and the air inlet 10, preventing loosening or falling off.

[0076] Optionally, refer to Figures 8 to 11 As shown, the filter frame 21 is also provided with at least one snap-fit ​​block 5, and the device housing 1 near the air inlet 10 has at least one snap-fit ​​groove 103, with the snap-fit ​​block 5 used to snap into the snap-fit ​​groove 103; and / or, the device housing 1 near the air inlet 10 is also provided with at least one snap-fit ​​block 5, and the filter frame 21 has at least one snap-fit ​​groove 103, with the snap-fit ​​block 5 used to snap into the snap-fit ​​groove 103. The filter frame 21 is snapped into the air inlet 10 by snap-fit.

[0077] For example, refer to Figure 11As shown, the snap-fit ​​groove 103 includes a first groove segment 1031, a second groove segment 1032, and a third groove segment 1033. The first groove segment 1031 and the third groove segment 1033 are constructed as straight grooves, and the diameter of the first groove segment 1031 is smaller than the diameter of the third groove segment 1033. The second groove segment 1032 is constructed as a trapezoidal groove and connects the first groove segment 1031 and the third groove segment 1033. The snap-fit ​​block 5 is inserted into the snap-fit ​​groove 103 through the third groove segment 1033 and slides at least partially to the first groove segment 1031 and abuts against the first groove segment 1031.

[0078] In this embodiment, the third slot segment 1033, serving as an insertion segment, has a larger diameter, facilitating the initial insertion of the snap-fit ​​block 5. The first slot segment 1031, with a smaller diameter, forms a narrow end segment, making it difficult to easily pull out the snap-fit ​​block 5 once it slides into it, acting as a kind of "lock." This design significantly enhances the reliability of the connection and facilitates snap-fit ​​operations.

[0079] Other embodiments of this disclosure will readily occur to those skilled in the art upon consideration of the specification and practice of this disclosure. This application is intended to cover any variations, uses, or adaptations of this disclosure that follow the general principles of this disclosure and include common knowledge or customary techniques in the art not disclosed herein. The specification and examples are to be considered exemplary only, and the true scope and spirit of this disclosure are indicated by the following claims.

[0080] It should be understood that this disclosure is not limited to the precise structures described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of this disclosure is limited only by the appended claims.

Claims

1. An air conditioning apparatus characterized by comprising: The air conditioning equipment comprises an equipment shell and at least one filter screen structure, the equipment shell is formed with at least one air inlet, and the filter screen structure is arranged at the air inlet; the filter screen structure comprises a filter screen frame and a filter screen body, and the filter screen body is arranged in the filter screen frame; The filter screen frame is provided with at least one insertion slot, and the air inlet is provided with at least one insertion strip which is arranged in the insertion slot; and / or the filter screen frame is provided with at least one insertion strip, and the air inlet is provided with at least one insertion slot, and the insertion strip is arranged in the insertion slot.

2. The air conditioning apparatus according to claim 1, wherein The filter screen frame is provided with a first insertion slot at a first end in a first direction, and the air inlet is provided with a first insertion strip at a first side in the first direction, and the first insertion strip is arranged in the first insertion slot; The filter screen frame is provided with a second insertion slot at a second end in the first direction, and the air inlet is provided with a second insertion strip at a second side in the first direction, and the second insertion strip is arranged in the second insertion slot.

3. The air conditioning apparatus according to claim 2, wherein The first insertion slot is provided with a plurality of support plates, and a plurality of support plates are arranged at intervals in a second direction, and the support plates are formed with support slots extending in a first direction and having a first opening, and the first insertion strip can be inserted into the support slot through the first opening and in the first direction; wherein the first direction and the second direction are arranged intersectingly.

4. The air conditioning apparatus according to claim 3, wherein The support slot comprises a first support slot section and a second support slot section which are communicated with each other, and one end of the first support slot section away from the second support slot section is configured as the first opening; In the direction of the first direction and away from the first opening, the caliber of the first support slot section gradually decreases, and the caliber of the second support slot section remains unchanged.

5. The air conditioning apparatus according to claim 3, wherein The size of the support slot in the first direction is between 5mm and 12mm, and the size of the support slot in a third direction is between 0.8mm and 1.6mm; wherein the first direction, the second direction and the third direction are arranged intersectingly.

6. The air conditioning apparatus according to any one of claims 2 to 5, characterized by The air inlet is provided with a first support plate extending in the first direction at a first side in the first direction, and at least part of the first support plate is configured as the first insertion strip.

7. The air conditioning apparatus according to claim 2, wherein The filter screen frame comprises a frame body, a first insertion slot plate and a second insertion slot plate; The first insertion slot plate and the second insertion slot plate are connected to the frame body and located at a second end of the filter screen frame in the first direction, and the first insertion slot plate and the second insertion slot plate are arranged extending in the first direction and at intervals in a third direction, and surround the second insertion slot with the frame body; wherein the first direction and the third direction are arranged intersectingly.

8. The air conditioning apparatus according to claim 7, wherein The air conditioning equipment further comprises at least one fastener, at least one of the first insertion slot plate and the second insertion slot plate is formed with a first fastening hole, the second insertion strip is formed with at least one second fastening hole, and the fastener passes through the first fastening hole and the second fastening hole to connect the second insertion strip to the first insertion slot plate and / or the second insertion slot plate.

9. The air conditioning apparatus according to claim 7, wherein The second insertion slot is further provided with a limiting block which is used for abutting against the second insertion strip.

10. The air conditioning apparatus according to claim 9, wherein The first slot plate is formed with a first fastening hole, and a size of the first slot plate in the first direction is greater than a size of the second slot plate in the first direction.

11. The air conditioning apparatus according to any one of claims 7 to 10, characterized by The air inlet is provided with a second support plate on a second side in the first direction; The second support plate comprises at least a first plate segment and a second plate segment, the first plate segment extends in the first direction, one side of the first plate segment is connected with the equipment shell in the first direction, and the other side is connected with the second plate segment, and the second plate segment extends in the third direction; The second plate segment and at least part of the first plate segment are configured as the second slot, the first plate segment can abut against the first slot plate in the third direction, and the second plate segment can abut against the second slot plate in the third direction.

12. The air conditioning apparatus according to claim 1, wherein The filter screen frame is further provided with at least one clamping block, the equipment shell is formed with at least one clamping groove near the air inlet, and the clamping block is used for clamping with the clamping groove; and / or, the equipment shell is further provided with at least one clamping block near the air inlet, and the filter screen frame is formed with at least one clamping groove, and the clamping block is used for clamping with the clamping groove.

13. The air conditioning apparatus according to claim 12, wherein The clamping groove comprises a first groove segment, a second groove segment and a third groove segment, the first groove segment and the third groove segment are configured as straight grooves, the caliber of the first groove segment is smaller than the caliber of the third groove segment, and the second groove segment is configured as a trapezoidal groove and communicates the first groove segment and the third groove segment; The clamping block is inserted into the clamping groove through the third groove segment, and at least partially slides to the first groove segment and abuts against the first groove segment.

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