Mechanical power switch and mounting structure thereof

Abstract

The utility model provides a mechanical power switch and a mounting structure thereof, and relates to the technical field of electric switches. The mechanical power switch comprises a shell, the upper end of the shell is provided with a pipe body part protruding upwards, the upper end of the pipe body part is provided with an opening, and an operation shaft is arranged in the pipe body part; in order to enhance the sealing protection performance, a sealing rubber sleeve made of a soft rubber material is further included, and the sealing rubber sleeve comprises a lantern ring connected to the outer portion of the pipe body part in a sleeving mode, a cover cap used for covering the opening and a connecting belt connecting the lantern ring and the cover cap. A limiting groove is formed outside the lantern ring. According to the mechanical power switch and the mounting structure thereof, the waterproof and dustproof performance can be effectively improved through optimization design, so that the use performance of the switch is effectively improved, and the service life of the switch is effectively prolonged.

Description

Technical Field

[0001] The utility model belongs to the technical field of electric switches, and in particular relates to a mechanical power switch and a mounting structure thereof. Background Art

[0002] In order to be able to cut off the power circuit in time when an abnormality occurs in the vehicle, or to prevent the battery from running low when the vehicle is not driven for a long time, a main power switch is usually installed on the vehicle, which can cut off the power of the entire vehicle. Patent document CN205656968U discloses a high-voltage emergency switch, including a mounting plate, a cross pan head screw, a hexagonal nut, a flat washer, a spring washer, a moving contact, a moving contact piece, a contact washer, a cover body, a pin A, a return spring, a pin B, a handle, a cam, a roller, a contact spring, a bushing, a washer, a core rod, a cover plate assembly, a threaded bushing, a magnet, a terminal, a static contact, and a cover plate. The mounting plate is fixedly connected to the cover body by a cross pan head screw; a cover plate assembly is provided in the cover body, the cover plate assembly is connected to the moving contact, the moving contact is connected to the moving contact piece, the center of the moving contact piece is sleeved on one end of the core rod, and the core rod is sleeved with a washer, a bushing, a contact spring, a contact washer, a pin A, a roller, a cam, a return spring, a pin B, and a handle in sequence from one end of the core rod close to the moving contact piece to the other end; a threaded bushing, a magnet, a terminal, a static contact, and a cover plate are provided on the cover plate assembly; and a hexagonal nut, a flat washer, and a spring washer are provided on the terminal. The problem with the switch in the above patent document is that no effective sealing structure is provided. In actual use, water and dust may penetrate through the gap on the upper part of the switch, thereby affecting the performance of the switch. Utility Model Content

[0003] In this regard, the utility model provides a mechanical power switch with a reasonable structure and an installation structure thereof, which can effectively improve the dustproof and waterproof performance of the switch by optimizing the structure.

[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0005] In a first aspect, the utility model provides a mechanical power switch, comprising a housing, wherein the upper end of the housing has a tube body portion protruding upward, the upper end of the tube body portion is provided with an opening, and an operating shaft is provided inside the tube body portion;

[0006] It also includes a sealing rubber sleeve made of soft rubber material, which includes a ring sleeved on the outside of the tube body, a cap for covering the opening, and a connecting belt connecting the ring and the cap; a limiting groove is provided on the outside of the ring.

[0007] In some embodiments, the limiting groove is an annular groove, and flanges protruding radially outward are formed on the ring at the upper and lower sides of the limiting groove.

[0008] In some embodiments, a sealing ring is provided between the operating shaft and the tube body.

[0009] In some embodiments, the cover cap includes a cap barrel portion adapted to be sleeved with the exterior of the tube body portion and a buckle cap portion disposed within the cap barrel portion, wherein the buckle cap portion is adapted to be buckled with the upper end of the operating shaft.

[0010] In some embodiments, the buckle cap portion is a tubular structure, and a buckle ring is formed on the inner periphery of the lower end thereof, and an annular groove that buckles with the buckle ring is provided on the upper end of the operating shaft.

[0011] In some embodiments, a force-applying handle protruding radially outward is provided on the outer side of the cap.

[0012] In some embodiments, the outer peripheral surface of the tube body portion is a conical surface whose diameter gradually increases from top to bottom, and the outer contour of the cross section of the tube body portion is circular.

[0013] In some embodiments, the mechanical power switch further comprises a movable touch panel assembly disposed in the housing for vertical movement, a return spring providing an upward elastic force for the movable touch panel assembly, and a terminal assembly fixed on the housing and corresponding to the vertical position of the movable touch panel assembly; the movable touch panel assembly comprises a mounting shaft disposed in the vertical direction and a movable touch panel mounted on the mounting shaft;

[0014] The operating shaft is arranged above the mounting shaft and can only rotate around its own axis. The lower end of the operating shaft is connected to the upper end of the mounting shaft by a clutch structure. The clutch structure has a first state and a second state that are switched by rotating the operating shaft. When the clutch structure is in the first state, the mounting shaft is in a low position and the moving touch plate is in contact with the terminal assembly. When the clutch structure is in the second state, the mounting shaft is in a high position and the moving touch plate is separated from the terminal assembly.

[0015] In some embodiments, the clutch structure includes a coaxial shaft portion and a shaft sleeve portion that are connected internally and externally, one of the shaft portion and the shaft sleeve portion is arranged at the lower end of the operating shaft, and the other of the shaft portion and the shaft sleeve portion is arranged at the upper end of the installation shaft;

[0016] A gear slot group is integrally provided on the inner wall of the sleeve portion, and a gear block matching with the gear slot group is provided on the side of the shaft rod portion. The gear slot group includes two gear slots arranged at different heights and a smooth surface connecting the two gear slots. When the gear block forms a limit fit with the two gear slots, they correspond to the first state and the second state respectively.

[0017] In the second aspect, the utility model provides a mounting structure of a mechanical power switch, comprising a mounting plate and any of the mechanical power switches described above, wherein the mounting plate is provided with a mounting hole that penetrates inside and outside, the tube body penetrates into the mounting hole from the inside of the mounting plate to the outside, the ring is pressed between the tube body and the wall of the mounting hole, and the limit groove is engaged with the wall of the mounting hole.

[0018] The utility model has the positive effects of optimizing the design of the mechanical power switch and its mounting structure, improving its own sealing and protection performance and the sealing and protection performance of its mounting hole, ensuring the performance of the switch, and having good practicality and popularization ability; specifically, the mechanical power switch is provided with the above-mentioned sealing rubber sleeve, and the opening is sealed by covering the upper end of the tube body with the cover cap on the sealing rubber sleeve. When the mechanical power switch needs to be controlled, the cover cap is opened and operated, and the cover cap is put back on after the operation is completed, so that the sealing and protection performance of the mechanical power switch can be effectively guaranteed; and the gap between the mounting hole on the mounting plate and the tube body can be sealed by the sleeve ring, thereby ensuring the sealing performance of the mounting part of the mechanical power switch. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1 It is a schematic diagram of the structure of the mechanical power switch (with the cover cap closed) in the utility model;

[0021] Figure 2 for Figure 1 A schematic diagram of the structure of the mechanical power switch (cap open) shown;

[0022] Figure 3 for Figure 1 A top view of the mechanical power switch shown;

[0023] Figure 4 For along Figure 3 A cross-sectional view cut along the AA line;

[0024] Figure 5 This is a schematic diagram of the structure of the operating shaft in the utility model;

[0025] Figure 6 It is a structural schematic diagram of the installation shaft in the utility model;

[0026] Figure 7It is a schematic diagram of the structure of the mechanical power switch after installation in the utility model.

[0027] The reference numerals shown in the figures are:

[0028] 1-housing; 11-tube body; 110-opening; 12-operating shaft; 121-annular buckle groove; 122-upper shaft body; 123-lower shaft body; 124-slot; 2-moving touch plate assembly; 21-mounting shaft; 22-moving touch plate; 23-limiting slide groove; 3-reset spring; 4-terminal assembly; 5-fixing screw; 6-shaft rod; 61-shift block; 7-shaft sleeve; 71-shift slot group; 72-shift slot; 73-smoothing surface; 8-mounting plate; 81-mounting hole;

[0029] 10-sealing rubber sleeve; 101-ring; 102-cover cap; 103-limiting groove; 104-flange; 105-cap barrel; 106-cap buckle; 107-buckle; 108-force application handle; 109-joint. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0031] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present utility model are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly. In the present utility model, unless otherwise clearly specified and limited, the terms "connection", "fixed", etc. should be understood in a broad sense. For example, "fixed" can be a fixed connection, a detachable connection, or an integral whole; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0032] In addition, the descriptions of "first", "second", etc. in the present invention are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of the features.

[0033] In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the fact that ordinary technicians in the field can implement it. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.

[0034] On the one hand, the mechanical power switch structure provided in this embodiment is as follows Figures 1 to 6 As shown, it includes a shell 1, the upper end of the shell 1 has a tube body portion 11 protruding upward, the tube body portion 11 and the shell 1 are injection molded as a whole, the upper end of the tube body portion 11 is provided with an opening 110, and the inside of the tube body portion 11 is provided with an operating shaft 12. When the mechanical power switch is operated, the dynamic touch panel assembly 2 inside the shell 1 is driven to move by applying force to the operating shaft 12, so as to control the mechanical power switch to be turned on and off. The operating shaft 12 can be operated with the help of an external handle, and the external handle is removed after the operation.

[0035] To enhance the sealing performance, see Figure 2 As shown, the mechanical power switch further includes a sealing rubber sleeve 10 made of soft rubber material, the sealing rubber sleeve 10 includes a collar 101 sleeved on the outside of the tube body 11, a cap 102 for covering the opening 110, and a joint 109 connecting the collar 101 and the cap 102; a limiting groove 103 is provided on the outside of the collar 101. The sealing rubber sleeve 10 can be made of rubber or silicone.

[0036] In the mechanical power switch, the sealing rubber sleeve 10 is provided, and the opening 110 can be sealed by covering the upper end of the tube body 11 with the cover cap 102 on the sealing rubber sleeve 10. When the mechanical power switch needs to be controlled, the cover cap 102 is opened and operated, and the cover cap 102 is put back on after the operation is completed, so that the sealing protection performance of the mechanical power switch can be effectively guaranteed; and the ring 101 can be used to seal the gap between the mounting hole 81 on the mounting plate 8 and the tube body 11, thereby ensuring the sealing performance of the installation part of the mechanical power switch.

[0037] In some embodiments, the limiting groove 103 is an annular groove, and the ring 101 is provided with flanges 104 protruding radially outward on the upper and lower sides of the limiting groove 103. When the ring 101 is installed in the mounting hole 81, the limiting groove 103 and the edge of the mounting hole 81 form an annular nesting fit, and the two flanges 104 are respectively exposed on both sides of the mounting hole 81 to play a stopping and limiting role, thereby ensuring that the ring 101 is reliably installed at the mounting hole.

[0038] In order to enhance the waterproof and dustproof performance, a sealing ring is further provided between the operating shaft 12 and the tube body 11. Specifically, an annular groove can be provided on the outer peripheral wall of the operating shaft 12, and the sealing ring can be inserted into the annular groove.

[0039] In some embodiments, Figure 2 and Figure 4 As shown, the cap 102 includes a cap barrel portion 105 suitable for being sleeved on the outside of the tube body portion 11 and a buckle cap portion 106 arranged inside the cap barrel portion 105, and the buckle cap portion 106 is suitable for being buckled with the upper end of the operating shaft 12. When the cap 102 is closed, the cap barrel portion 105 is sleeved on the outside of the upper end of the tube body portion 11, and the buckle cap portion 106 is extended into the opening 110 and buckled with the upper end of the operating shaft 12, thereby ensuring the stability of the installation of the cap 102 and the sealing protection.

[0040] In order to ensure the firmness of the buckle cap portion 106 and the upper end of the operating shaft 12, the buckle cap portion 106 is preferably arranged as a tubular structure, and a buckle ring 107 is formed on the inner periphery of the lower end thereof. The upper end of the operating shaft 12 is provided with an annular groove 121 which is buckled with the buckle ring 107. After the cover cap 102 is closed, the buckle ring 107 is effectively buckled with the annular groove 121.

[0041] In some embodiments, a force-applying handle 108 protruding radially outward is disposed on the outer side of the cap 102 . The force-applying handle 108 facilitates applying force when opening the cap 102 .

[0042] Preferably, the cross-sectional outer contour of the upper end of the operating shaft 12 is set to a polygon such as a triangle, quadrilateral, pentagon, hexagon, etc., and the inner cavity of the sleeve on the external handle is correspondingly matched with the shape of the upper end of the operating shaft 12. In this way, when the operating shaft 12 is rotated, the sleeve of the external handle is sleeved on the outside of the upper end of the operating shaft 12 and then rotated to control the rotation of the operating shaft 12, which can withstand greater rotational torque; in actual operation, the cross-sectional outer contour of the upper end of the operating shaft 12 can also be semicircular, elliptical, etc.

[0043] Furthermore, the outer peripheral surface of the tube body 11 is a conical surface with a gradually increasing diameter from top to bottom. This arrangement facilitates the insertion of the tubular portion 11 into the ring 101 during installation of the mechanical power switch, and the ring 101 will be gradually compressed during the insertion of the tubular portion to enhance the sealing performance.

[0044] In some embodiments, Figures 4 to 6As shown, the mechanical power switch also includes a movable touch panel assembly 2 arranged in the housing 1 for upward and downward movement, a return spring 3 providing an upward elastic force for the movable touch panel assembly 2, and a terminal assembly 4 fixed on the housing 1 and corresponding to the upper and lower positions of the movable touch panel assembly 2; the movable touch panel assembly 2 includes a mounting shaft 21 arranged in the upper and lower directions and a movable touch panel 22 mounted on the mounting shaft 21; the operating shaft 12 is arranged above the mounting shaft and the operating shaft 12 can only rotate around its own axis, the lower end of the operating shaft 12 is connected to the upper end of the mounting shaft 21 through a clutch structure, the clutch structure has a first state and a second state that are switched by rotating the operating shaft 12, the existence of the clutch structure enables the upper and lower positions of the movable touch panel assembly 2 in the housing 1 to be changed when the operating shaft 12 rotates, the mounting shaft 21 is in a low position and the movable touch panel 22 is in contact with the terminal assembly 4 in the first state of the clutch structure, and the mounting shaft 21 is in a high position and the movable touch panel 22 is separated from the terminal assembly 4 in the second state of the clutch structure. By adopting the above structure, the state switching of the mechanical power switch is controlled by rotating the operating shaft 5. Specifically, in actual use, the operating shaft 5 is controlled to rotate, driving the clutch structure to switch between the first state and the second state, so that the upper and lower positions of the moving touch plate assembly 2 are changed, and then the moving touch plate 22 is controlled to contact and separate with the terminal assembly 4, thereby achieving the purpose of controlling the on and off of the mechanical power switch.

[0045] Combination Figures 4 to 6 As shown, the clutch structure includes a coaxial shaft portion 6 and a sleeve portion 7 that are connected inside and outside. The shaft portion 6 is arranged at the lower end of the operating shaft 12, and the sleeve portion 7 is arranged at the upper end of the mounting shaft 21. A gear slot group 71 is integrally provided on the inner side wall of the sleeve portion 7. A gear block 61 that matches the gear slot group 71 is provided on the side of the shaft portion 6. The gear slot group 71 includes two gear slots 72 arranged at different heights and a smooth surface 73 connecting the two gear slots 72. When the gear block 61 and the two gear slots 72 form a limit fit, they correspond to the first state and the second state. , under the action of the reset spring 3, the shift block 61 and the shift slot group 71 keep in contact, and in the process of controlling the rotation of the operating shaft 12, the shift block 61 is driven to pass through the smooth surface 73 from one shift slot 72 to another shift slot 72. In this process, the shift block 61 keeps in contact with the smooth surface 73 and slides on the smooth surface 73 to guide the moving touch panel assembly 2 to move up and down. When the moving touch panel assembly 2 moves downward, the reset spring 3 is gradually compressed, and when the reset spring 3 releases the elastic force, the moving touch panel assembly 2 moves upward. The clutch structure has a simple structure, stable performance, and is easy to produce. As a modified implementation scheme, in actual operation, the shaft sleeve part 7 can also be set at the lower end of the operating shaft 12, and the shaft rod part 6 can be correspondingly set at the upper end of the mounting shaft 21. It is preferred to set the shift slot group 71 to two, three or four and evenly distributed along the circumferential direction, and correspondingly set two, three or four shift blocks 61.

[0046] In order to prevent the installation shaft 21 from rotating relative to the housing 1, an anti-rotation structure is provided between the installation shaft 21 and the housing 1, and the installation shaft 21 is circumferentially limited by the anti-rotation structure, so that the installation shaft 21 can only move up and down relative to the housing 1, but cannot rotate relative to the housing 1. Here, a specific anti-rotation structure is provided: it includes a limiting slider provided on the inner wall of the housing 1 and a limiting slot 23 provided on the installation shaft 21, and the limiting slot 23 forms a sliding fit with the limiting slider in the up and down direction. As a variation, the limiting slot 23 and the limiting slider can be interchangeably arranged in actual operation.

[0047] In some embodiments, Figure 4 As shown, an annular stop is provided on the inner wall of the tube body 11, and an annular groove 124 is provided on the operating shaft 5. The groove 124 is engaged with the annular stop so that the operating shaft 5 can only rotate relative to the shell 1 but cannot move up and down relative to the shell 1; for the convenience of assembly, the operating shaft 5 can adopt a split assembly structure, including an upper shaft body 122 and a lower shaft body 123, the lower end of the upper shaft body 122 is fixedly connected to the upper end of the lower shaft body 123, and the limiting groove 124 is formed between the upper shaft body 122 and the lower shaft body 123, and the upper shaft body 122 and the lower shaft body 123 can be fixed using a fixing screw 5.

[0048] On the other hand, this embodiment provides a mounting structure for a mechanical power switch, such as Figure 7 As shown, it includes a mounting plate 8 and a mechanical power switch in any of the above embodiments, the mounting plate 8 is provided with a mounting hole 81 that penetrates inside and outside, when the mechanical power switch is installed, the tube body 11 penetrates the mounting hole 81 from the inside of the mounting plate 8 to the outside, the collar 101 is pressed between the tube body 11 and the hole wall of the mounting hole 81, the limiting groove 103 is engaged with the hole wall of the mounting hole 81, when installing, the collar 101 is first positioned in the mounting hole 81 by cooperating with the hole wall of the mounting hole 81 through the limiting groove 103, and then the tube body 11 passes through the mounting hole 81 from the inside to the outside, when the mechanical power switch is installed in place, the tube body 11 presses the collar 101 in the mounting hole 81, so that the gap between the tube body 11 and the hole wall of the mounting hole 81 is sealed by the collar 101, thereby ensuring the waterproof and dustproof performance of the mounting hole 81.

[0049] The above is only a specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed by the utility model, which should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.

Claims

1. A mechanical power switch, comprising a housing (1), wherein the upper end of the housing (1) has a tube portion (11) protruding upward, an opening (110) is arranged at the upper end of the tube portion (11), and an operating shaft (12) is arranged inside the tube portion (11); It is characterized in that It also includes a sealing rubber sleeve (10) made of soft rubber material, the sealing rubber sleeve (10) comprising a collar (101) sleeved on the outside of the tube body (11), a cover cap (102) for covering the opening (110), and a connecting belt (109) connecting the collar (101) and the cover cap (102); a limiting groove (103) is provided on the outside of the collar (101).

2. The mechanical power switch according to claim 1, characterized in that: The limiting groove (103) is an annular groove, and flanges (104) protruding radially outward are formed on the collar (101) at the upper and lower sides of the limiting groove (103).

3. The mechanical power switch according to claim 1, characterized in that: A sealing ring is provided between the operating shaft (12) and the tube body (11).

4. The mechanical power switch according to claim 1, characterized in that: The cover cap (102) comprises a cap tube portion (105) adapted to be sleeved with the outside of the tube body portion (11) and a buckle cap portion (106) arranged inside the cap tube portion (105), wherein the buckle cap portion (106) is adapted to be buckled with the upper end of the operating shaft (12).

5. The mechanical power switch according to claim 4, characterized in that: The buckle cap portion (106) is a tubular structure, and the inner periphery of the lower end thereof forms a buckle ring (107). The upper end of the operating shaft (12) is provided with a ring groove (121) that buckles with the buckle ring (107).

6. The mechanical power switch according to claim 4, characterized in that: The outer side of the cover cap (102) is provided with a force applying handle (108) which protrudes radially outward.

7. The mechanical power switch according to claim 1, characterized in that: The outer peripheral surface of the tube body (11) is a conical surface whose diameter gradually increases from top to bottom, and the outer contour of the cross section of the tube body (11) is circular.

8. The mechanical power switch according to any one of claims 1 to 7, characterized in that: The mechanical power switch also includes a movable touch panel assembly (2) arranged in a housing (1) for vertical movement, a return spring (3) for providing an upward elastic force for the movable touch panel assembly (2), and a terminal assembly (4) fixed on the housing (1) and corresponding to the vertical position of the movable touch panel assembly (2); the movable touch panel assembly (2) includes a mounting shaft (21) arranged in the vertical direction and a movable touch panel (22) mounted on the mounting shaft (21); The operating shaft (12) is arranged above the mounting shaft and the operating shaft (12) can only rotate around its own axis. The lower end of the operating shaft (12) is connected to the upper end of the mounting shaft (21) via a clutch structure. The clutch structure has a first state and a second state that are switched by rotating the operating shaft (12). When the clutch structure is in the first state, the mounting shaft (21) is in a low position and the movable touch plate (22) is in contact with the terminal assembly (4). When the clutch structure is in the second state, the mounting shaft (21) is in a high position and the movable touch plate (22) is separated from the terminal assembly (4).

9. The mechanical power switch according to claim 8, characterized in that: The clutch structure comprises a coaxial shaft portion (6) and a shaft sleeve portion (7) which are connected inside and outside, one of the shaft portion (6) and the shaft sleeve portion (7) is arranged at the lower end of the operating shaft (12), and the other of the shaft portion (6) and the shaft sleeve portion (7) is arranged at the upper end of the installation shaft (21); A gear slot group (71) is integrally provided on the inner side wall of the shaft sleeve portion (7), and a gear block (61) matched with the gear slot group (71) is provided on the side of the shaft rod portion (6). The gear slot group (71) comprises two gear slots (72) arranged at different heights and a smooth surface (73) connecting the two gear slots (72). When the gear block (61) and the two gear slots (72) form a limit fit, they correspond to the first state and the second state.

10. A mounting structure for a mechanical power switch, characterized in that: It comprises a mounting plate (8) and a mechanical power switch according to any one of claims 1 to 9, wherein the mounting plate (8) is provided with a mounting hole (81) penetrating inside and outside, the tube body (11) penetrates into the mounting hole (81) from the inside of the mounting plate (8) to the outside, the ring (101) is pressed between the tube body (11) and the wall of the mounting hole (81), and the limiting groove (103) is embedded in the wall of the mounting hole (81).

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