Magnetic attraction fixing device

Abstract

The utility model relates to a magnetic attraction fixing device which is used for magnetic attraction to fix a target object and comprises a first seat body and a second seat body, the first seat body is provided with an attaching surface used for making contact with the target object, the second seat body is provided with a magnetic attraction component, and the magnetic attraction component is used for magnetically attracting the target object to be attached to the attaching surface; the first seat body and the second seat body are rotatably connected with each other around an axis, a distance adjusting structure is arranged between the first seat body and the second seat body, and the distance adjusting structure is used for changing the position of the second seat body so as to adjust the magnetic attraction distance between the attaching surface and the magnetic attraction part. The distance adjusting structure is arranged between the first base body and the second base body, the distance between the attaching surface and the magnetic attraction part is changed through the distance adjusting structure, namely the magnetic attraction distance, the magnetic attraction force to the target object is changed through the change of the magnetic attraction distance, and the magnetic force is adjusted; the proper magnetic attraction distance can be adjusted according to the size of a target object, and the effects that the target object is easily taken and placed and is not prone to falling off are achieved.

Description

Technical Field

[0001] The present application relates to a magnetic fixing device, and more particularly to a magnetic fixing device with adjustable magnetic distance. Background Art

[0002] When using electronic devices such as mobile phones, a bracket is often used to support the electronic device. The magnetic bracket uses magnetic attraction to adsorb the electronic device on the bracket, which is simple and quick. Some magnetic brackets are also equipped with wireless charging coils to charge the electronic device at the same time. However, the magnetic attraction of the current magnetic bracket to the electronic device is mostly constant. If the magnetic attraction is too small, it will be unstable, and if it is too large, it will be difficult to remove. How to change the magnetic attraction of the magnetic bracket to the electronic device is a problem that needs to be solved in this application. Utility Model Content

[0003] In order to overcome the problems existing in the related art, the present application aims to provide a magnetic attraction fixing device with adjustable magnetic attraction distance.

[0004] The present application is implemented through the following technical solutions.

[0005] The technical solution is to provide a magnetic attraction fixing device for magnetic attraction to fix a target object, comprising a first base having a fitting surface for contacting the target object and a second base having a magnetic attraction component, wherein the magnetic attraction component is used to magnetically attract the target object to fit the fitting surface;

[0006] The first seat body and the second seat body can be rotatably connected relative to each other around an axis. A distance adjustment structure is provided between the first seat body and the second seat body, and the distance adjustment structure is used to change the position of the second seat body to adjust the magnetic distance between the fitting surface and the magnetic attraction component.

[0007] The technical effect of the present technical solution is that a distance adjustment structure is provided between the first seat body and the second seat body, and the distance adjustment structure is used to change the distance between the fitting surface and the magnetic attraction component, that is, the magnetic attraction distance. The change of the magnetic attraction distance changes the magnitude of the magnetic attraction to the target object, thereby achieving the adjustment of the magnetic force. The appropriate magnetic attraction distance can be adjusted according to the size of the target object, so as to achieve the effect of easily taking and placing the target object without it falling easily.

[0008] In one or more embodiments, the first seat body is a movable seat provided on the second seat body and can rotate around an axis, the second seat body is a fixed seat, the distance adjustment structure is provided between the movable seat and the fixed seat, and the movable seat changes the magnetic distance between the fitting surface and the magnetic attraction component through the distance adjustment structure when rotating.

[0009] In one or more embodiments, the distance adjustment structure includes an inner ring and an outer ring, the outer ring is sleeved on the inner ring, the inner side wall of the outer ring is provided with one or more spiral grooves, and the outer side wall of the inner ring is provided with one or more protrusions that fit into the spiral grooves; one of the inner ring and the outer ring is connected to the fixed seat, and the other is connected to the movable seat.

[0010] In this way, the inner ring and the outer ring are nested to achieve a rotational connection between the fixed seat and the movable seat, and also achieve the adjustment of the magnetic attraction distance.

[0011] In one or more embodiments, the inner ring is connected to the movable seat; or, the inner ring and the movable seat are an integrated structure.

[0012] In one or more embodiments, the outer ring is connected to the fixing seat; or, the outer ring and the fixing seat are an integrated structure.

[0013] In one or more embodiments, at least one first limiting portion is provided in the spiral groove, and at least one second limiting portion that can cooperate with the first limiting portion is provided on the protrusion, and the first limiting portion and the second limiting portion cooperate to limit the rotation position of the movable seat.

[0014] In one or more embodiments, the first limiting portion is a convex point provided on the bottom surface of the spiral slide groove, and the second limiting portion is a concave point provided on the end surface of the protrusion.

[0015] In one or more embodiments, a plurality of insertion grooves respectively connected to each of the spiral grooves are provided on the inner side wall of the outer ring, and the insertion grooves are arranged corresponding to the protrusions.

[0016] In one or more embodiments, the magnetic attraction component is a magnet, and the magnetic attraction component is located in the inner ring.

[0017] In one or more embodiments, the fixing base is further provided with a connecting portion, and the connecting portion is used to fix the connecting component. The connecting component is a component used to connect and support the fixing base, for example, it can be a ball head seat, a connecting rod, etc. When the ball head seat is fixed to the connecting portion by screws, the ball head seat is connected to a base for placing on a desktop or a clamp for clamping a car, etc., to form a magnetic bracket.

[0018] In one or more embodiments, the distance adjustment structure includes an outer ring and an inner ring, the outer ring is sleeved on the inner ring, the inner side wall of the outer ring is provided with an internal thread, and the outer side wall of the inner ring is provided with an external thread matching the internal thread; one of the inner ring and the outer ring is connected to the fixed seat, and the other is connected to the movable seat.

[0019] Thus, as an alternative way of connecting the inner ring and the outer ring, the inner ring and the outer ring of the distance adjustment structure may be directly connected by a threaded connection structure, which can also adjust the magnetic attraction distance.

[0020] In one or more embodiments, the distance adjustment structure includes a stud and a boss with a screw hole, the stud cooperates with the screw hole, wherein the stud is provided at the center of one of the fixed seat and the movable seat, and the boss is provided at the center of the other.

[0021] In one or more embodiments, the distance adjustment structure further includes an inner ring and an outer ring, the outer ring is sleeved on the inner ring, one of the inner ring and the outer ring is connected to the fixed seat, and the other is connected to the movable seat;

[0022] At least one first limiting portion is provided on the inner side of the outer ring, and at least one second limiting portion that can cooperate with the first limiting portion is provided on the outer side of the inner ring, and the first limiting portion and the second limiting portion cooperate to limit the rotation position of the movable seat; or, a locking screw is provided between the outer ring and the inner ring.

[0023] In one or more embodiments, the first seat body is a shell seat having an inner cavity, the second seat body is a rotating seat arranged in the shell seat, and the rotating seat is provided with a magnetic attraction component;

[0024] The distance adjustment structure comprises one or more spiral grooves and one or more protrusions matched and placed in the spiral grooves, wherein one of the side wall of the rotating seat and the inner side wall of the shell seat is provided with the spiral groove, and the other is provided with the protrusion;

[0025] The rotating seat is provided with a toggle portion, and the shell seat is provided with an opening for avoiding the toggle portion.

[0026] In one or more embodiments, the first seat body is a shell seat having an inner cavity, the second seat body is a rotating seat arranged in the shell seat, and the rotating seat is provided with a magnetic attraction component;

[0027] The distance adjustment structure comprises a stud and a screw hole, wherein the stud matches the screw hole, wherein the stud is arranged at the center of the housing seat, and the screw hole is arranged at the center of the rotating seat;

[0028] The rotating seat is provided with a toggle portion, and the shell seat is provided with an opening for avoiding the toggle portion.

[0029] It should be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The above and other objects, features and advantages of the present application will become more apparent through a more detailed description of exemplary embodiments of the present application in conjunction with the accompanying drawings, wherein the same reference numerals generally represent the same components in the exemplary embodiments of the present application.

[0031] Figure 1 It is the first structural schematic diagram of the partial structure of the magnetic attraction fixing device shown in the first embodiment of the present application.

[0032] Figure 2 This is a second structural schematic diagram of a partial structure of the magnetic fixing device shown in Example 1 of the present application.

[0033] Figure 3 It is a cross-sectional structural schematic diagram and a partial enlarged diagram of a part of the structure of the magnetic attraction fixing device shown in the first embodiment of the present application.

[0034] Figure 4 It is a schematic diagram of the exploded structure of a part of the structure of the magnetic fixing device shown in the first embodiment of the present application.

[0035] Figure 5 It is a structural schematic diagram and a partial enlarged diagram of the movable seat of the magnetic fixing device shown in Example 1 of the present application.

[0036] Figure 6 It is a schematic diagram of the exploded structure of a part of the structure of the magnetic fixing device shown in the second embodiment of the present application.

[0037] Figure 7 It is a schematic diagram of the exploded structure of a part of the structure of the magnetic fixing device shown in the third embodiment of the present application.

[0038] Figure 8 It is a structural schematic diagram of a partial structure of the magnetic fixing device shown in Example 4 of the present application.

[0039] Fig. 9 It is the first exploded structural schematic diagram of a partial structure of the magnetic fixing device shown in Example 4 of the present application.

[0040] Fig.10 This is a second exploded structural diagram of a partial structure of the magnetic fixing device shown in Example 4 of the present application.

[0041] Fig.11It is a schematic diagram of the exploded structure of a part of the structure of the magnetic fixing device shown in Example 5 of the present application.

[0042] Description of reference numerals:

[0043] 11-fixed seat; 112-outer ring; 113-spiral slide groove; 114-protrusion; 115-insertion groove; 116-connecting part; 117-boss; 119-screw hole; 118-limiting protrusion; 12-movable seat; 121-fitting surface; 122-inner ring; 123-protrusion; 124-concave point; 127-stud; 128-limiting groove; 13-magnetic component; 14-locking screw; 141-locking screw hole; 21-shell seat; 21a-upper shell; 21b-lower shell; 211-opening; 22-rotating seat; 221-sliding part. DETAILED DESCRIPTION

[0044] The following will be combined with the drawings in some embodiments of the present application to clearly and completely describe the technical solutions in some embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0045] The technical solution of the embodiments of the present application is described in detail below with reference to the accompanying drawings.

[0046] Embodiment 1

[0047] like Figures 1 to 5 As shown in , the first embodiment of the present invention is a magnetic fixing device with adjustable magnetic attraction distance, and the magnetic fixing device is used for magnetic adsorption to fix the target object. In this embodiment, the magnetic fixing device is an example of a magnetic mobile phone holder, and the target object is an example of a mobile phone.

[0048] In this embodiment, the magnetic mobile phone holder includes a fixed seat 11 as a second seat body, a movable seat 12 as a first seat body and a magnetic attraction component 13. The movable seat 12 is provided with a fitting surface 121 for contacting a mobile phone. The magnetic attraction component 13 is provided on the fixed seat 11. The magnetic attraction component 13 is used to magnetically adsorb the mobile phone to fit the fitting surface 121. The movable seat 12 is provided on the fixed seat 11 and rotates around an axis. A distance adjustment structure is provided between the movable seat 12 and the fixed seat 11. When the movable seat 12 rotates, the distance adjustment structure changes the magnetic attraction distance between the fitting surface 121 and the magnetic attraction component 13.

[0049] In this way, by providing a distance adjustment structure between the movable seat 12 and the fixed seat 11, the distance adjustment structure is used to change the distance between the movable seat 12 and the fixed seat 11 to adjust the magnetic suction distance. The change in the magnetic suction distance changes the magnitude of the magnetic attraction to the mobile phone, thereby achieving the adjustment of the magnetic force and achieving the effect of easily taking and placing the mobile phone without it falling easily.

[0050] In this embodiment, the distance adjustment structure includes an inner ring 122 and an outer ring 112, the outer ring 112 is sleeved on the inner ring 122, the inner side wall of the outer ring 112 is provided with a plurality of spiral grooves 113, and the outer side wall of the inner ring 122 is provided with a plurality of protrusions 123 that fit in the spiral grooves 113, wherein the shapes of the protrusions 123 and the spiral grooves 113 are not limited to those shown in the drawings, and can be set according to actual needs; one of the inner ring 122 and the outer ring 112 is connected to the fixed seat 11, and the other is connected to the movable seat 12. In this way, the inner ring 122 and the outer ring 112 are sleeved to realize the rotation connection between the fixed seat 11 and the movable seat 12, and also realize the adjustment of the magnetic attraction distance.

[0051] Exemplarily, the number of the spiral grooves 113 is one to four, all of the spiral grooves 113 are symmetrically arranged with respect to the axis, and the two ends of the spiral grooves 113 are not connected, so that the length of the spiral grooves 113 can limit the maximum rotation angle of the movable seat 12, the inner ring 122 and the movable seat 12 are an integrated structure, the outer ring 112 and the fixed seat 11 are an integrated structure, and the movable seat 12 and the fixed seat 11 can both be made of plastic injection molding or made of metal materials.

[0052] In this embodiment, in order to position the movable seat 12 after rotating to adjust the magnetic attraction distance, at least one first limiting portion is provided in the spiral groove 113, and at least one second limiting portion that can cooperate with the first limiting portion is provided on the protrusion 123. The first limiting portion and the second limiting portion cooperate to limit the rotation position of the movable seat 12.

[0053] Exemplarily, the first limiting portion is a convex point 114 provided on the bottom surface of the spiral slide groove 113, and the second limiting portion is a concave point 124 provided on the end surface of the protrusion 123. The number of the convex points 114 is one or more, preferably one to six, for example, the limiting is arranged by rotating 5 degrees, 10 degrees or 15 degrees, and the number of the concave point 124 is one. In order to enable the convex point 114 to slide into the concave point 124, inclined or arc-shaped guide surfaces are provided on both sides of the protrusion 123.

[0054] In this embodiment, in order to facilitate disassembly and assembly and enable the protrusion 123 to be inserted into the spiral groove 113, a plurality of insertion grooves 115 respectively connected to each spiral groove 113 are provided on the inner wall of the outer ring 112, wherein the insertion grooves 115 are provided corresponding to the protrusions 123.

[0055] In this embodiment, the magnetic attraction component 13 is a ring-shaped magnet. The magnetic attraction component 13 is located in the inner ring 122 . The magnetic attraction component 13 is fixedly mounted on the fixing seat 11 .

[0056] In this embodiment, a connecting portion 116 is also provided on the fixing base 11, and the connecting portion 116 is used to fix a connecting component, which is not shown in the figure. The connecting component is a component used to connect and support the fixing base 11, for example, it can be a ball head seat, a connecting rod, etc. When the ball head seat is fixed to the connecting portion 116 by screws, the ball head seat is then connected to a base for placing on a desktop or a clamp for clamping a car, etc., thereby forming a magnetic mobile phone holder.

[0057] In another embodiment, the distance adjustment structure includes an outer ring 112 and an inner ring 122, the outer ring 112 is sleeved on the inner ring 122, the inner side wall of the outer ring 112 is provided with an internal thread, and the outer side wall of the inner ring 122 is provided with an external thread matching the internal thread; one of the inner ring 122 and the outer ring 112 is connected to the fixed seat 11, and the other is connected to the movable seat 12. In this way, as an alternative to connecting the inner ring 122 and the outer ring 112, the inner ring 122 and the outer ring 112 of the distance adjustment structure can be directly connected by a threaded structure, and the magnetic attraction distance can also be adjusted.

[0058] Embodiment 2

[0059] like Figure 6 As shown in , the second embodiment is a magnetic attraction fixing device with adjustable magnetic attraction distance, which is different from the first embodiment in the distance adjustment structure. The distance adjustment structure in the present embodiment includes a stud 127 and a boss 117 with a screw hole 119, and the stud 127 cooperates with the screw hole 119, wherein the center of one of the movable seats 12 is provided with a stud 127, and the center of the fixed seat 11 is provided with a boss 117. Specifically, the axis of the stud 127 and the screw hole 119 is coaxially arranged with the axis of rotation of the movable seat 12.

[0060] In this way, by matching the stud 127 with the screw hole 119 , the distance between the movable seat 12 and the fixed seat 11 can be changed when the movable seat is rotated, so as to adjust the magnetic attraction distance.

[0061] In this embodiment, the movable seat 12 can be positioned after rotating to adjust the magnetic attraction distance. The adjustment structure also includes an inner ring 122 and an outer ring 112. The outer ring 112 is sleeved on the inner ring 122. One of the inner ring 122 and the outer ring 112 is connected to the fixed seat, and the other is connected to the movable seat. At least one first limiting portion is provided on the inner side of the outer ring 112, and at least one second limiting portion that can cooperate with the first limiting portion is provided on the outer side of the inner ring 122. The first limiting portion and the second limiting portion cooperate to limit the rotation position of the movable seat.

[0062] Specifically, a limiting groove 128 is provided on the inner wall of the outer ring 112, and a limiting protrusion 118 is provided on the inner wall of the inner ring 122. The limiting protrusion 118 is limited to move in the limiting groove 128. The length of the limiting groove determines the maximum rotation angle of the movable seat. In order to limit the specific rotation position, the first limiting portion is a convex point provided on the bottom surface of the limiting groove, and the second limiting portion is a concave point provided on the end surface of the limiting protrusion. The structures of the first limiting portion and the second limiting portion are consistent with those in Example 1.

[0063] Embodiment 3

[0064] like Figure 7 As shown in , the difference between this embodiment three and embodiment two is that, as an alternative implementation of the limiting groove and the limiting protrusion, and the first limiting portion and the second limiting portion, a locking screw 14 is provided between the outer ring 112 and the inner ring 122, and the locking screw 14 is tightened in the locking screw hole 141 to limit the rotation position of the movable seat 12.

[0065] Embodiment 4

[0066] like Figures 8 to 10 As shown in , the difference between the magnetic fixing device of this embodiment and the embodiment 1 is that the first seat body is configured as a shell seat 21 with an inner cavity, the shell seat is assembled by an upper shell 21a and a lower shell 21b, and a connecting portion 116 is provided on the lower shell 21b, and the connecting portion 116 is used to fix the connecting component, and the second seat body is a rotating seat 22 arranged inside the shell seat, and a magnetic attraction component 13 is provided on the rotating seat 22, and the magnetic attraction component is exemplarily a ring-shaped magnet, and the magnetic attraction component 13 is fixedly mounted on the rotating seat.

[0067] In this embodiment, the distance adjustment structure includes a plurality of spiral grooves 113 and a plurality of protrusions 123 arranged in the spiral grooves. Through the cooperation between the spiral grooves 113 and the protrusions, the rotating seat 22 can rotate inside the shell seat 21 and move along the axial direction during rotation. When the fitting surface 121 remains unchanged, the magnetic attraction component 13 is moved to change the magnetic attraction distance.

[0068] Specifically, a spiral groove 113 is provided on the side wall of the rotating seat, and a protrusion 123 is provided on the inner wall of the upper shell of the shell. In the example, there are four spiral grooves 113 and protrusions, but it can also be other numbers such as two or three, etc. The shape of the protrusion is preferably cylindrical.

[0069] In this embodiment, in order to facilitate disassembly and assembly so that the protrusion 123 can be inserted into the spiral groove 113, a plurality of insertion grooves 115 are provided on the inner side wall of the upper shell, which are respectively connected to each spiral groove 113, wherein the insertion grooves 115 are provided corresponding to the protrusions 123.

[0070] In this embodiment, a toggle portion 221 is provided on the rotating seat 22, and an opening 211 for avoiding the toggle portion is provided on the shell seat 21. The toggle portion 221 is used to operate the rotating seat for rotation. The toggle portion 221 passes through the opening 211 to the outside of the shell seat 21 so that the user can operate it. Exemplarily, the shape of the opening is usually corresponding to the spiral groove 113, so that the rotation of the rotating seat is not affected.

[0071] Embodiment 5

[0072] like Fig.11 As shown, the difference between the magnetic fixing device of this embodiment and the fourth embodiment is that the distance adjustment structure adopts a threaded method for adjustment. Specifically, the distance adjustment structure includes a stud 127 and a screw hole 119, and the stud 127 cooperates with the screw hole 119. The stud 127 is provided at the center of the lower shell 21b of the shell seat 21, and the screw hole 119 is provided at the center of the rotating seat 22. The axes of the screw hole 119 and the stud 127 are coaxially arranged with the rotation axis of the rotating seat 22.

[0073] The embodiments of the present application have been described above, and the above description is exemplary, not exhaustive, and is not limited to the disclosed embodiments. Many modifications and changes will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments. The selection of terms used herein is intended to best explain the principles of the embodiments, practical applications, or improvements to the technology in the market, or to enable other persons of ordinary skill in the art to understand the embodiments disclosed herein.

Claims

1. A magnetic fixing device, used for magnetic adsorption to fix a target object, characterized in that: It comprises a first base body having a fitting surface for contacting a target object and a second base body provided with a magnetic attraction component, wherein the magnetic attraction component is used to magnetically attract the target object to fit on the fitting surface; The first seat body and the second seat body are rotatably connected to each other around an axis. A distance adjustment structure is provided between the first seat body and the second seat body. The distance adjustment structure is used to change the position of the second seat body to adjust the magnetic distance between the fitting surface and the magnetic attraction component.

2. The magnetic fixing device according to claim 1, characterized in that: The first seat body is a movable seat arranged on the second seat body and can rotate around an axis, the second seat body is a fixed seat, the distance adjustment structure is arranged between the movable seat and the fixed seat, and the movable seat changes the magnetic distance between the fitting surface and the magnetic attraction component through the distance adjustment structure when rotating.

3. The magnetic fixing device according to claim 2, characterized in that: The distance adjustment structure includes an inner ring and an outer ring, the outer ring is sleeved on the inner ring, the inner side wall of the outer ring is provided with one or more spiral grooves, and the outer side wall of the inner ring is provided with one or more protrusions that fit into the spiral grooves; one of the inner ring and the outer ring is connected to the fixed seat, and the other is connected to the movable seat.

4. The magnetic fixing device according to claim 3, characterized in that: At least one first limiting portion is disposed on the inner side of the outer ring, and at least one second limiting portion that can cooperate with the first limiting portion is disposed on the outer side of the inner ring. The first limiting portion and the second limiting portion cooperate to limit the rotation position of the movable seat.

5. The magnetic fixing device according to claim 4, characterized in that: The first limiting portion is a convex point arranged on the bottom surface of the spiral slide groove, and the second limiting portion is a concave point arranged on the end surface of the protrusion.

6. The magnetic fixing device according to claim 2, characterized in that: The distance adjustment structure includes an outer ring and an inner ring, the outer ring is sleeved on the inner ring, the inner side wall of the outer ring is provided with an internal thread, and the outer side wall of the inner ring is provided with an external thread matching the internal thread; one of the inner ring and the outer ring is connected to the fixed seat, and the other is connected to the movable seat.

7. The magnetic fixing device according to claim 2, characterized in that: The distance adjustment structure comprises a stud and a boss with a screw hole, wherein the stud matches the screw hole, wherein the stud is provided at the center of one of the fixed seat and the movable seat, and the boss is provided at the center of the other one.

8. The magnetic fixing device according to claim 7, characterized in that: The distance adjustment structure further comprises an inner ring and an outer ring, wherein the outer ring is sleeved on the inner ring, and one of the inner ring and the outer ring is connected to the fixed seat, and the other is connected to the movable seat; At least one first limiting portion is provided on the inner side of the outer ring, and at least one second limiting portion that can cooperate with the first limiting portion is provided on the outer side of the inner ring, and the first limiting portion and the second limiting portion cooperate to limit the rotation position of the movable seat; or, a locking screw is provided between the outer ring and the inner ring.

9. The magnetic fixing device according to claim 1, characterized in that: The first seat body is a shell seat with an inner cavity, and the second seat body is a rotating seat arranged in the shell seat, and a magnetic attraction component is arranged on the rotating seat; The distance adjustment structure comprises one or more spiral grooves and one or more protrusions matched and placed in the spiral grooves, wherein one of the side wall of the rotating seat and the inner side wall of the shell seat is provided with the spiral groove, and the other is provided with the protrusion; The rotating seat is provided with a toggle portion, and the shell seat is provided with an opening for avoiding the toggle portion.

10. The magnetic fixing device according to claim 1, characterized in that: The first seat body is a shell seat with an inner cavity, and the second seat body is a rotating seat arranged in the shell seat, and a magnetic attraction component is arranged on the rotating seat; The distance adjustment structure comprises a stud and a screw hole, wherein the stud matches the screw hole, wherein the stud is arranged at the center of the housing seat, and the screw hole is arranged at the center of the rotating seat; The rotating seat is provided with a toggle portion, and the shell seat is provided with an opening for avoiding the toggle portion.

Images