Inner rear-view mirror cover integrated with automobile data recorder and use method of inner rear-view mirror cover
By using the sloped plane design of the guide components and the mounting head, the problem of easy damage to the interior rearview mirror cover during repeated disassembly and assembly is solved, achieving convenient installation and a stable connection, improving service life and reliability, and reducing maintenance costs.
Patent Information
- Application Number
- CN202511262702.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-09-05
- Publication Date
- 2025-11-18
- Estimated Expiration
- Not applicable · inactive patent
AI Technical Summary
The existing snap-fit mechanism of the interior rearview mirror cover is prone to damage during repeated disassembly and assembly, resulting in failure of the stable connection and affecting its service life and reliability.
The cover is designed with guide components, a snap-fit head, and an arc plate structure. The insertion of the guide components and the sloped plane design of the snap-fit head enable convenient installation and removal of the cover. The combination of the limiting plate and the arc plate enhances the stability of the snap-fit assembly and allows for modular replacement.
It simplifies the operation process, improves installation stability and service life, reduces maintenance costs, enhances the practicality and safety of the device, and provides a convenient operating experience and reliable performance.
Smart Images

Figure CN120963530A_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the technical field of interior rearview mirror covers, specifically an interior rearview mirror cover integrated with a driving recorder and its use method. BACKGROUND
[0002] The interior rearview mirror cover integrated with a driving recorder is a kind of automobile accessory that combines the functions of traditional interior rearview mirrors and driving recorders. This design embeds a high-definition camera in the rearview mirror cover, which can record the road conditions in front of the vehicle in real time during driving, providing additional safety for the driver. It not only has the reflecting function of ordinary rearview mirrors, but also automatically records video and locks key video evidence in the event of a collision, making it easier to identify accident liability. The rearview mirror cover is a protective device installed on the exterior of the interior rearview mirror, usually used to cover and decorate the main body of the rearview mirror. It not only protects the rearview mirror from physical damage such as scratches, but also enhances the aesthetic and personalized style of the car interior through different materials and colors. Some rearview mirror covers also integrate additional functions such as driving recorders and anti-glare functions, further enhancing their practicality. The existing interior rearview mirror cover mainly relies on a clamping mechanism for installation. This design is indeed convenient for initial installation, but during repeated maintenance or disassembly, the clamping mechanism can easily be damaged if not handled properly. This is because the clamping mechanism is usually made of brittle materials such as plastic, and repeated disassembly and assembly can cause the clasp to deform or break, affecting the stable connection between the cover and the rearview mirror. Therefore, to solve the above problems, an interior rearview mirror cover integrated with a driving recorder and its use method are proposed. SUMMARY
[0003] The purpose of the present application is to provide an interior rearview mirror cover integrated with a driving recorder and its use method to solve the problems raised in the background art.
[0004] To achieve the above-mentioned purpose, the present application provides the following technical solutions: The utility model provides an inside rear -view mirror cover of integrated driving recorder, including cover assembly, the inside fixed connection of cover assembly has the mounting seat subassembly, the outside joint of mounting seat subassembly has the joint subassembly, the inside of cover assembly is close to left end and is inserted with the threading subassembly, the mounting seat subassembly includes side plate, the fixed connection of two side plates has the clamping plate, the inside of clamping plate is equipped with the clamping groove, the upper end of clamping groove is equipped with the guide slope, the joint subassembly includes the clamping head, the first slope plane of clamping head is equipped with in the position close to upper portion, the second slope plane of clamping head is equipped with in the position close to lower portion, the inside of clamping head is equipped with built -in recess, the upper end of built -in recess is fixedly connected with the limiting plate, one side of limiting plate is fixedly connected with the limiting lug, the lower end of built -in recess is fixedly connected with the arc plate, the upper end of arc plate is equipped with L shape groove.
[0005] As a further optimization of the present application, wherein: the cover assembly includes a cover body, the cover body is fixedly connected with a guide near the rear end, the cover body is provided with an assembly opening near the guide.
[0006] As a further optimization of the present application, wherein: the cover body is provided with a first heat dissipation hole near the front end, the cover body is provided with a third heat dissipation hole near the rear end, and the cover body is provided with a second heat dissipation hole at the right end.
[0007] As a further optimization of the present application, wherein: the cover body is provided with a fixing opening at the left end, the fixing opening extends into the cover body near the fixing opening, the fixing opening is in communication with the inside of the cover body, and the inside of the fixing opening is in contact with the outside of the threading assembly.
[0008] As a further optimization of the present application, wherein: the side plate is fixedly connected with a reinforcing plate on one side, and the reinforcing plate is fixedly connected with the cover body at the bottom end.
[0009] As a further optimization of the present application, wherein: the clamping head is sleeved on the outside of the clamping plate, the limiting lug is in contact with the clamping plate, the arc plate is clamped inside the clamping groove through the L-shaped slot, and a spacing is provided between the two arc plates.
[0010] As a further optimization of the present application, wherein: the limiting plate and the arc plate are embedded inside the built-in recess, and the first slope plane and the second slope plane are both inclined structures.
[0011] As a further optimization of the present application, wherein: the threading assembly includes a threading block, the left end of the threading block is fixedly connected with a rubber stopper, the outside of the threading block is fixedly connected with an anti-dropping rubber block, and the rubber stopper and the anti-dropping rubber block are clamped with the cover body.
[0012] As further optimization of the application, wherein: the inside of the threading block is provided with a mounting hole, the inside of the mounting hole is fixedly connected with a rubber sheet, the left end of the mounting hole is fixedly connected with a tapered rubber cylinder, the rubber sheet is fixedly connected with the tapered rubber cylinder on one side, the tapered rubber cylinder is in the shape of a hollow conical structure, and the inside of the tapered rubber cylinder is provided with an inclined groove and friction lines.
[0013] A method for using an integrated rearview mirror cover with a driving recorder; Step one: when the cover body is mounted and dismounted, the two guide pieces are respectively aligned with the insertion slots of the mounting seat, the cover body is pressed to move towards the mounting seat, through the arrangement of the guide pieces, the clamping head is in contact with the clamping slot, the clamping head is extruded, the first slope plane of the clamping head is in contact with the clamping slot, the first slope plane is extruded, the clamping head is deformed, the clamping head deforms and drives the arc plates to move, the two arc plates are tightly attached to each other, the arc plates close to the L-shaped slot slide in the inside of the clamping slot, the part of the clamping head where the first slope plane and the second slope plane meet enters the wide position of the clamping slot, the clamping head restores its shape, the front end and the rear end of the clamping head are arched, and the second slope plane is in contact with the clamping slot during deformation; when dismounting, the cover body is pulled away from the mounting seat, the arc plates are clamped in the inside of the clamping slot through the L-shaped slot, the second slope plane is extruded, and the clamping head is deformed to a certain extent and then separated from the inside of the recess of the mounting seat; Step two: when the clamping assembly is replaced, one end of the clamping head at the bottom end is moved in the circumferential direction to move one of the arc plates away from the clamping slot, the arc plate at one end of the clamping head is located at the upper end of the clamping plate, and the clamping head is in a bent state of about 90 degrees; the clamping head is moved towards the other end, the arc plate at the other end is separated from the inside of the clamping slot, the clamping head is installed, the opening of the clamping head is directly inserted into the upper end of the clamping plate, the arc plate is extruded and moves into the inside of the built-in recess, the limiting plate is in contact with the guide slope, the limiting plate is extruded and also moves into the inside of the built-in recess; Step three: when the external line is installed, the external line is inserted into the inside of the threading block and the tapered rubber cylinder through the fixing port, the tapered rubber cylinder is in contact with the line, the extrusion causes the tapered rubber cylinder to deform, the inside of the tapered rubber cylinder deforms towards the inside of the inclined groove, and the position of the tapered rubber cylinder close to the inclined groove is turned inward.
[0014] Compared with the prior art, the application has the following beneficial effects: 1. In this invention, the guide components, clamping head, and arc plate greatly simplify the operation process when installing and removing the cover, making the whole process more convenient and efficient. The unique structural design also significantly enhances the stability after installation. This improvement not only reduces the risk of damage caused by improper operation, but also effectively extends the service life of the device and improves the overall reliability. Users can clearly feel a more convenient operating experience and a more reliable use effect, thereby greatly improving user satisfaction and ease of use. 2. In this invention, the snap-fit component ensures that even if the device is partially damaged during multiple disassembly and assembly processes, there is no need to replace the entire cover plate, which greatly reduces maintenance costs and significantly improves the practicality and economy of the device. At the same time, the replacement process of the snap-fit component is extremely convenient, and users can quickly complete the disassembly and installation without complicated operations. The replaced structure has strong stability and effectively avoids functional failure caused by loose parts. 3. In this invention, the wiring assembly effectively prevents the wire from coming off the device due to accidental movement, while also reducing wire wear caused by vehicle vibration, thus significantly improving the safety and stability of the wire connection. Attached Figure Description
[0015] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a partial cross-sectional structural diagram of the cover assembly of the present invention; Figure 3 For the present invention Figure 2 A schematic diagram of the structure at point A; Figure 4 For the present invention Figure 2 A schematic diagram of the structure at point B; Figure 5 This is a schematic diagram of the cover body structure of the present invention; Figure 6 This is a schematic diagram of the mounting bracket assembly structure of the present invention; Figure 7 For the present invention Figure 6 A schematic diagram of the structure at point C; Figure 8 This is a schematic diagram of the snap-fit assembly structure of the present invention; Figure 9 This is a schematic diagram of the threading assembly structure of the present invention; Figure 10 This is a cross-sectional structural diagram of the threading assembly of the present invention; Figure 11 For the present invention Figure 10 A schematic diagram of the structure at point D.
[0016] In the diagram: 1. Cover assembly; 11. Cover body; 12. Guide component; 13. Assembly port; 14. First heat dissipation hole; 15. Second heat dissipation hole; 16. Third heat dissipation hole; 17. Fixing port; 2. Mounting bracket assembly; 21. Side plate; 22. Clamping plate; 23. Clamping slot; 24. Guide slope; 25. Reinforcing plate; 3. Snap-fit assembly; 31. Snap-fit head; 32. First slope plane; 33. Second slope plane; 34. Limiting plate; 35. Limiting protrusion; 36. Built-in groove; 37. Arc plate; 38. L-shaped groove; 4. Threading assembly; 41. Threading block; 42. Rubber baffle; 43. Anti-detachment rubber block; 44. Mounting hole; 45. Rubber sheet; 46. Conical rubber cylinder; 47. Inclined groove; 48. Friction texture. Detailed Implementation
[0017] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.
[0018] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.
[0019] Please see Figures 1-11 The present invention provides a technical solution: An integrated rearview mirror cover for a vehicle dashcam and its usage method are disclosed. The cover assembly 1 includes a mounting base assembly 2 fixedly connected to the inner side of the cover assembly 1, a snap-fit assembly 3 snapped onto the outer side of the mounting base assembly 2, and a wire threading assembly 4 inserted into the inner side of the cover assembly 1 near the left end. The mounting base assembly 2 includes side plates 21, and a snap plate 22 is fixedly connected between the two side plates 21. A snap groove 23 is formed on the inner side of the snap plate 22, and a guide slope 24 is formed at the upper end of the snap groove 23. The snap-fit assembly 3 includes a snap-fit head 31, a first slope plane 32 is formed near the upper part of the snap-fit head 31, a second slope plane 33 is formed near the lower part of the snap-fit head 31, an internal groove 36 is formed on the inner side of the snap-fit head 31, a limiting plate 34 is fixedly connected to the upper end of the internal groove 36, a limiting protrusion 35 is fixedly connected to one side of the limiting plate 34, and an arc plate 37 is fixedly connected to the lower end of the internal groove 36. An L-shaped groove 38 is formed at the upper end of the arc plate 37.
[0020] As a further implementation of this solution, the cover assembly 1 includes a cover body 11. A guide 12 is fixedly connected to the cover body 11 near the rear end. An assembly port 13 is provided on the cover body 11 near the guide 12. Through the above arrangement, space is left for the cover body 11 to be installed and matched with the dashcam, and at the same time, it plays a guiding role in the installation of the cover body 11. As a further implementation of this solution, a first heat dissipation hole 14 is provided near the front end of the cover body 11, a third heat dissipation hole 16 is provided near the rear end of the cover body 11, and a second heat dissipation hole 15 is provided at the right end of the cover body 11. Through the above settings, heat dissipation can be achieved inside the cover body 11, especially for use in environments exposed to direct sunlight. As a further implementation of this solution, a fixing port 17 is provided at the left end of the cover body 11. The cover body 11 extends into the cover body 11 near the fixing port 17. The fixing port 17 communicates with the inner side of the cover body 11. The inner side of the fixing port 17 fits against the outer side of the wire threading assembly 4. Through the above arrangement, the wire can pass through smoothly and connect with the internal structure. At the same time, the wire threading assembly 4 can be disassembled and replaced. As a further implementation of this solution, a reinforcing plate 25 is fixedly connected to one side of the side plate 21. The bottom end of the reinforcing plate 25 is fixedly connected to the cover body 11. Through the above-mentioned arrangement, the overall stability of the device is enhanced, the structural strength of the device is strengthened, and the service life is improved. As a further implementation of this solution, the mounting head 31 is sleeved on the outside of the mounting plate 22, the limiting protrusion 35 is in contact with the mounting plate 22, and the arc plate 37 is engaged in the inside of the slot 23 through the L-shaped groove 38. A gap is provided between the two arc plates 37. Through the above settings, the tight fit between the components is ensured, and the stability of the structure is improved. The arc plate 37 is engaged in the inside of the slot 23 through the L-shaped groove 38, so that the mounting head 31 can be firmly installed on the mounting plate 22, providing space for the deformation and movement of the components, and enhancing the flexibility and durability of the device. As a further implementation of this solution, the limiting plate 34 and the arc plate 37 are both embedded in the interior of the built-in groove 36. The first slope plane 32 and the second slope plane 33 are both inclined structures. Through the above settings, space is left for the deformation of the limiting plate 34 and the arc plate 37. The first slope plane 32 and the second slope plane 33 provide convenience for the installation and removal of the clamping head 31. As a further implementation of this solution, the wire threading assembly 4 includes a wire threading block 41. A rubber baffle 42 is fixedly connected to the left end of the wire threading block 41, and an anti-detachment rubber block 43 is fixedly connected to the outside of the wire threading block 41. The rubber baffle 42 and the anti-detachment rubber block 43 are clamped and cooperate with the cover body 11. A mounting hole 44 is opened on the inner side of the wire threading block 41. A rubber sheet 45 is fixedly connected to the inner side of the mounting hole 44. A conical rubber cylinder 46 is fixedly connected to the left end of the mounting hole 44. One side of the rubber sheet 45 is fixedly connected to the conical rubber cylinder 46. The conical rubber cylinder 46 is a hollow conical structure. An inclined groove 47 and friction texture 48 are opened on the inner side of the conical rubber cylinder 46. Through the above settings, not only is the fixing effect of the wire improved, but the wear resistance of the wire is also enhanced, reducing the risk of wire damage caused by vibration or external force, and improving the safety and reliability of the device.
[0021] Workflow: When installing and removing the cover body 11, the mounting base is pre-fixed to the windshield. A slot is provided on the mounting base near the guide member 12, the size of which matches the size of the guide member 12. A snap-fit groove is provided on the cover body 11 near the snap-fit assembly 3, the groove being narrower on the outside and wider on the inside, for snap-fit installation with the snap-fit assembly 3. Align the two guide members 12 with the slots on the mounting base, and press the cover body 11 firmly towards the mounting base. The guide members 12 help to position the cover body 11 correctly. The locking head 31 acts as a limiting device. When it contacts the locking groove, it is compressed. First, the first sloped plane 32 of the locking head 31 contacts the locking groove. By compressing the first sloped plane 32, the locking head 31 at the junction of the first sloped plane 32 and the second sloped plane 33 deforms. The locking head 31 has a built-in groove to provide space for its deformation. When the locking head 31 deforms, it drives the arc plate 37 to move. The locking head 31 drives the two arc plates 37, which are pressed tightly against each other. The part near the L-shaped groove 38 slides inside the slot 23, leaving space for the deformation of the arc plate 37. When the part of the mounting head 31 at the junction of the first slope plane 32 and the second slope plane 33 enters the wide part of the mounting groove, the mounting head 31 automatically returns to its shape. At this time, the front and rear ends of the mounting head 31 arch up. During deformation, the second slope plane 33 will contact the mounting head 31's mounting groove. After contact, the second slope plane 33, due to its slope, can automatically push the mounting head 31 into the mounting base, improving the stability of the installation. During disassembly, it can be directly... Pulling the cover body 11 away from the mounting base can prevent the locking assembly 3 from separating from the locking plate 22 because the arc plate 37 is locked inside the locking groove 23 through the L-shaped groove 38. The second slope plane 33 is set as a slope. When the second slope plane 33 is squeezed, the locking head 31 will also deform. After the locking head 31 deforms to a certain extent, it will disengage from the groove of the mounting base, thus completing the disassembly. This disassembly method is relatively simple and can reduce the phenomenon of breakage of the locking part caused by disassembly operation, thus improving the service life. When replacing the snap-fit assembly 3, directly operate from one end of the snap-fit head 31 in a circumferential direction. First, move one of the arc plates 37 away from the slot 23. When the arc plate 37 at one end of the snap-fit head 31 is above the slot 22, the snap-fit head 31 is in a bent state of approximately 90 degrees. Then move the snap-fit head 31 to the other end until the arc plate 37 at the other end disengages from the slot 23. The snap-fit head 31 can then be disassembled. Install the new snap-fit head 31, inserting the opening of the snap-fit head 31 directly into the upper end of the slot 22. Since the arc plate 37 has an arc surface structure near the lower end, when the slot 22 contacts the arc plate 37, the arc plate 37 is squeezed. The arc plate 37 moves into the built-in groove 36, and the lower end of the limiting plate 34 is also provided with a certain slope. After the limiting plate 34 contacts the guide slope 24, the limiting plate 34 is squeezed and moves into the built-in groove 36 until the L-shaped groove 38 of the arc plate 37 is engaged with the slot 23. The design of the limiting protrusion 35 serves to contact the guide slope 24 and prevent relative movement between the clamping head 31 and the clamping plate 22. This replacement method is not only convenient, but also ensures that the structure after replacement is relatively stable. At the same time, the modular design of the clamping component 3 eliminates the need for multiple disassembly and assembly to avoid damage that could render the entire cover unusable, thus improving the practicality of the device. During installation with external wiring, the external wiring is inserted into the wire guide block 41 and the conical rubber cylinder 46 through the fixing port 17. During the wire guide process, the conical rubber cylinder 46 comes into contact with the wiring. The shape design of the conical rubber cylinder 46 can accommodate wiring of various diameters. When the wiring is inserted into the conical rubber cylinder 46, the conical rubber cylinder 46 deforms due to compression. The inner part of the conical rubber cylinder 46 deforms into the inclined groove 47. The friction texture 48 can increase the friction between the conical rubber cylinder 46 and the wiring. At the same time, the friction texture 48 is set in the inclined groove 47. Near point 7, when the line moves outward unexpectedly, the friction between the conical rubber cylinder 46 and the friction groove 48 causes the conical rubber cylinder 46 to flip inward. This effectively reduces the effect of the line detaching from the cover body 11 due to accidents. At the same time, the design of the conical rubber cylinder 46 and the rubber sheet 45 reduces the wear between the line and the wire guide block 41 caused by vibration generated by the vehicle, improving safety. The rubber baffle 42 and the anti-detachment rubber block 43 are made of rubber. By pulling the wire guide block 41 with great force, the wire guide block 41 can be disassembled.
[0022] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.
Claims
1. A rearview mirror cover for an integrated dashcam, comprising a cover assembly (1), characterized in that: The cover assembly (1) is fixedly connected to the inner side of the mounting base assembly (2), and the mounting base assembly (2) is snapped with the outer side of the mounting base assembly (2). The cover assembly (1) is inserted with the wire threading assembly (4) near the left end of the inner side. The mounting bracket assembly (2) includes a side plate (21), and a retaining plate (22) is fixedly connected between the two side plates (21). A retaining groove (23) is provided on the inner side of the retaining plate (22), and a guide slope (24) is provided at the upper end of the retaining groove (23). The snap-fit assembly (3) includes a snap-fit head (31), a first slope plane (32) is provided near the upper part of the snap-fit head (31), a second slope plane (33) is provided near the lower part of the snap-fit head (31), an inner groove (36) is provided on the inner side of the snap-fit head (31), a limiting plate (34) is fixedly connected to the upper end of the inner groove (36), a limiting protrusion (35) is fixedly connected to one side of the limiting plate (34), an arc plate (37) is fixedly connected to the lower end of the inner groove (36), and an L-shaped groove (38) is provided on the upper end of the arc plate (37).
2. The rearview mirror cover for an integrated dashcam according to claim 1, characterized in that: The cover assembly (1) includes a cover body (11), a guide (12) is fixedly connected to the cover body (11) near the rear end, and an assembly port (13) is opened on the cover body (11) near the guide (12).
3. The rearview mirror cover for an integrated dashcam according to claim 2, characterized in that: The cover body (11) has a first heat dissipation hole (14) near the front end, a third heat dissipation hole (16) near the rear end, and a second heat dissipation hole (15) at the right end.
4. The rearview mirror cover for an integrated dashcam according to claim 2, characterized in that: The cover body (11) has a fixing port (17) at the left end. The cover body (11) extends into the cover body (11) near the fixing port (17). The fixing port (17) is connected to the inside of the cover body (11). The inside of the fixing port (17) is in contact with the outside of the threading assembly (4).
5. The rearview mirror cover for an integrated dashcam according to claim 1, characterized in that: A reinforcing plate (25) is fixedly connected to one side of the side plate (21), and the bottom end of the reinforcing plate (25) is fixedly connected to the cover body (11).
6. The rearview mirror cover for an integrated dashcam according to claim 1, characterized in that: The mounting head (31) is sleeved on the outside of the card plate (22), the limiting protrusion (35) is in contact with the card plate (22), the arc plate (37) is engaged in the inside of the card slot (23) through the L-shaped groove (38), and a gap is provided between the two arc plates (37).
7. The rearview mirror cover for an integrated dashcam according to claim 1, characterized in that: The limiting plate (34) and the arc plate (37) are both embedded in the interior of the built-in groove (36), and the first slope plane (32) and the second slope plane (33) are both inclined structures.
8. The rearview mirror cover for an integrated dashcam according to claim 1, characterized in that: The threading assembly (4) includes a threading block (41), a rubber baffle (42) is fixedly connected to the left end of the threading block (41), and an anti-detachment rubber block (43) is fixedly connected to the outside of the threading block (41). The rubber baffle (42) and the anti-detachment rubber block (43) are clamped and cooperated with the cover body (11).
9. The rearview mirror cover for an integrated dashcam according to claim 8, characterized in that: The threading block (41) has a mounting hole (44) on its inner side. A rubber sheet (45) is fixedly connected to the inner side of the mounting hole (44). A conical rubber cylinder (46) is fixedly connected to the left end of the mounting hole (44). One side of the rubber sheet (45) is fixedly connected to the conical rubber cylinder (46). The conical rubber cylinder (46) is a hollow conical structure. The inner side of the conical rubber cylinder (46) has a slanted groove (47) and a friction texture (48).
10. A method of using an interior rearview mirror cover for an integrated dashcam according to any one of claims 1-9, characterized in that: Step 1: When installing and removing the cover body (11), the two guides (12) are aligned with the slots of the mounting base. Press the cover body (11) to move towards the mounting base. Through the setting of the guides (12), the snap-fit head (31) contacts the snap-fit groove. The snap-fit head (31) is squeezed. The first slope plane (32) opened by the snap-fit head (31) contacts the snap-fit groove. The first slope plane (32) is squeezed, and the snap-fit head (31) deforms. When the snap-fit head (31) deforms, it will drive the arc plate (37) to move. The snap-fit head (31) drives the two arc plates (37). The two arc plates (37) are tightly attached to each other. The arc plates (37) are close to the L-shaped groove. (38) slides inside the slot (23) and the part of the snap-fit head (31) at the junction of the first slope plane (32) and the second slope plane (33) enters the wide part of the snap-fit groove. The snap-fit head (31) returns to its shape and the front and rear ends of the snap-fit head (31) arch up. When deformed, the second slope plane (33) will contact the snap-fit groove of the snap-fit head (31). When disassembling, the cover body (11) is pulled away from the mounting seat. Because the arc plate (37) is snapped into the inside of the slot (23) through the L-shaped groove (38), the second slope plane (33) is squeezed. After the snap-fit head (31) is deformed to a certain extent, it is separated from the groove inside the mounting seat. Step 2: When replacing the snap-fit assembly (3), the operation starts from one end of the snap-fit head (31) and moves in a circumferential direction, so that one of the arc plates (37) moves away from the slot (23). After the arc plate (37) at one end of the snap-fit head (31) is located at the upper end of the slot (22), the snap-fit head (31) is in a bent state of about ninety degrees. The snap-fit head (31) moves to the other end, and the arc plate (37) at the other end disengages from the slot (23). The snap-fit head (31) is installed, and the opening of the snap-fit head (31) is directly inserted into the upper end of the slot (22). The arc plate (37) is squeezed and moves into the inner groove (36). After the limiting plate (34) contacts the guide slope (24), the limiting plate (34) is squeezed and also moves into the inner groove (36). Step 3: When installing with external lines, the external lines are inserted into the wire block (41) and the conical rubber cylinder (46) through the fixing port (17). The conical rubber cylinder (46) will come into contact with the lines, and the squeezing action will deform the conical rubber cylinder (46). The inner part of the conical rubber cylinder (46) will deform into the inclined groove (47), and the position of the conical rubber cylinder (46) near the inclined groove (47) will turn inward.