Blade position receiving device

Abstract

The application discloses a kind of blade state receiving device, and the blade state receiving device includes shell assembly and blade state receiver, shell assembly includes shell and cover, shell is equipped with installation cavity and the avoiding opening being communicated with installation cavity, blade state receiver is installed in installation cavity, and the terminal of blade state receiver is exposed to avoid opening, cover is detachably connected with shell, and at least cover part avoiding opening, to cover the operating position of terminal fixed cable.This application technical scheme, it can form protection to the operating position of terminal, avoid the operating position of terminal to be influenced by external factors and be damaged.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of power equipment, in particular to a disconnecting link state receiving device. BACKGROUND

[0002] The isolating switch state detection device is used for isolating switch state detection, and can be applied to a digitalized transformer substation or a digitalized transformation of a conventional transformer substation, to realize one-key sequential control "double confirmation" transformation.

[0003] The main function of the disconnecting link state receiving device is to collect signals of the isolating switch state detection device, and output simplified signals after relevant operation processing, and upload the signals to a transformer substation control platform, to achieve a preprocessing purpose.

[0004] The disconnecting link state receiving device is usually installed in a narrow space, and the space available for on-site operators is narrow. In order to facilitate wiring operation on the wiring terminal, the wiring terminal of the existing disconnecting link state receiving device is exposed on the outer surface of the shell assembly without any protection, so that the wiring terminal of the disconnecting link state receiving device is easily damaged by external factors after installation. CONTENT OF THE UTILITY MODEL

[0005] The main purpose of the present application is to provide a disconnecting link state receiving device, which aims to improve the existing disconnecting link state receiving device, and to facilitate wiring operation on the wiring terminal, the wiring terminal of which is exposed on the outer surface of the shell assembly without any protection.

[0006] To achieve the above purpose, the disconnecting link state receiving device provided by the present application comprises a shell assembly and a disconnecting link state receiver, the shell assembly comprises a shell and a cover, the shell is provided with a mounting cavity and an avoiding opening communicating with the mounting cavity, the disconnecting link state receiver is installed in the mounting cavity, and the wiring terminal of the disconnecting link state receiver is exposed on the avoiding opening, the cover is detachably connected with the shell and covers at least part of the avoiding opening to cover the operation position of the cable fixed to the wiring terminal.

[0007] In some embodiments of the present application, the avoiding opening comprises two first opening parts and second opening parts in communication, and the plane where the first opening part is located is arranged adjacent to the plane where the second opening part is located.

[0008] The wiring terminal has the operation position and a wiring position for cable access, the operation position is arranged opposite to the first opening part, and the wiring position is arranged opposite to the second opening part, and the cover is detachably connected with the shell to cover the first opening part.

[0009] In some embodiments of the present application, the cover is movably connected with the shell when installed in the shell, and the cover is moved relative to the shell to cover the operating position of the terminal or to be misaligned with the avoiding opening.

[0010] In some embodiments of the present application, the cover is rotatably connected with the shell when installed in the shell, and the cover is rotated towards the avoiding opening to cover the operating position of the terminal or is rotated away from the avoiding opening to be misaligned with the avoiding opening.

[0011] In some embodiments of the present application, the cover comprises a cover plate and a connecting arm, the connecting arm has a first segment and a second segment connected with each other, the first segment is fixedly connected with the cover plate away from one end of the second segment, the second segment is rotatably connected with the shell away from one end of the first segment, and is spaced apart from one end of the first segment away from the second segment to form an avoiding space between the first segment and the second segment.

[0012] In some embodiments of the present application, the shell further has a mounting hole communicating with the mounting cavity, a rotating shaft is arranged on the cavity wall of the mounting cavity, and a rotating connecting portion is arranged on one end of the second segment away from the first segment, the rotating connecting portion extends into the mounting cavity through the mounting hole and is rotatably connected with the rotating shaft.

[0013] In some embodiments of the present application, the rotating connecting portion comprises two oppositely arranged elastic arms, an accommodating space for accommodating the rotating shaft is formed between the two elastic arms, and the rotating shaft can enter or exit the accommodating space under the action of an external force.

[0014] In some embodiments of the present application, the second segment is arranged perpendicularly to the cover plate, and a first limiting protrusion is protrudingly arranged on the hole wall of the mounting hole, the first limiting protrusion abuts against the second segment when the cover is misaligned with the avoiding opening, so that the cover remains in the misaligned state with the avoiding opening.

[0015] In some embodiments of the present application, the cover plate further has a second limiting protrusion, the second limiting protrusion abuts against the hole wall of the mounting hole when the cover covers the operating position of the terminal, so that the cover remains in the state of covering the operating position of the terminal.

[0016] In some embodiments of the present application, the cover is provided with a sliding groove on each opposite side, the shell is provided with two guide rails on each side of the avoiding opening, and the two guide rails and the two sliding grooves are arranged in one-to-one correspondence.

[0017] When the cover is installed on the housing, the guide rail abuts against the groove wall of the slide. The cover slides towards the clearance opening to cover the operating position of the wiring terminal. The cover slides away from the clearance opening and is misaligned with the clearance opening.

[0018] The disconnect switch status receiving device provided in this application embodiment, through the above-described structural configuration, allows for the following steps after fixed installation in the control cabinet: the cover is removed from the outer casing, and the disconnect switch status signal line is introduced into the mounting cavity through the clearance opening and connected to the wiring position of the terminal block. The wiring tool enters the mounting cavity through the clearance opening and operates the terminal block to lock the disconnect switch status signal line in the wiring position. The tool then exits the mounting cavity through the clearance opening, which is unobstructed. Finally, the cover is installed on the outer casing to shield the terminal block's operating position, thus protecting it. Therefore, the technical solution of this application, after the disconnect switch status signal line is installed at the wiring position, allows the cover to cover the operating position, protecting the terminal block's operating position from damage caused by external factors. Simultaneously, the cover's protection of the operating position improves the integrity and aesthetics of the disconnect switch status receiving device. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the structure of an embodiment of the disconnector status receiving device of this application;

[0021] Figure 2 for Figure 1 A schematic diagram showing the effect of opening the cover of the switch status receiving device.

[0022] Figure 3 for Figure 2 Cross-sectional view of the status receiving device for the intermediate disconnect switch;

[0023] Figure 4 for Figure 3 A magnified view of a section at point A in the middle;

[0024] Figure 5 for Figure 3 A magnified view of a section at point B in the middle;

[0025] Figure 6 for Figure 1Exploded view of the middle-blade shutter state receiving device

[0026] Figure 7 For Figure 1 Partial structural schematic view of the middle-blade shutter state receiving device.

[0027] Explanation of the reference signs:

[0028] 100, the middle-blade shutter state receiving device; 10, the shell assembly; 11, the shell; 111, the mounting cavity; 1111, the rotating shaft; 112, the avoiding opening; 1121, the first opening part; 1122, the second opening part; 113, the mounting hole; 1131, the first limiting protrusion; 12, the cover body; 121, the cover plate; 1211, the second limiting protrusion; 122, the connecting arm; 1221, the first section; 1222, the second section; 1223, the rotating connection part; 1224, the elastic arm; 1225, the accommodating space; 20, the wiring terminal; 21, the operation position; 22, the wiring position.

[0029] The implementation, functional features and advantages of the present application will be further described with reference to the embodiments and the accompanying drawings. DETAILED DESCRIPTION

[0030] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0031] In the present application, unless otherwise explicitly specified and limited, the terms “connection”, “fixation” and the like should be understood in a broad sense, for example, “fixation” can be fixed connection, or detachable connection, or integral; can be mechanical connection, or electrical connection; can be direct connection, or indirect connection through an intermediate medium; can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise explicitly limited. For those skilled in the art, the specific meanings of the above terms in the present application can be understood according to the specific circumstances.

[0032] In addition, the descriptions such as "first", "second" and the like in the present application are only for the purpose of description, and cannot be understood as indicating or implying the relative importance of the technical features indicated or implying the number of technical features indicated. Therefore, the features defined as "first", "second" can be explicitly or implicitly included at least one of the features. In addition, the technical solutions of various embodiments can be combined with each other, but it must be based on the realization of ordinary skilled in the art, when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist, nor within the protection scope required by the present application.

[0033] The embodiment of the present application provides a knife switch state receiving device 100, which is used in cooperation with the isolating switch state detection device. Generally, the knife switch state receiving device 100 collects the signals of the isolating switch state detection device, and outputs the simplified signals after relevant operation processing, and uploads to the substation general control platform, so as to achieve the purpose of preprocessing.

[0034] Please refer to Figures 1 to 7 The knife switch state receiving device 100 includes a shell assembly 10 and a knife switch state receiver. The shell assembly 10 includes a shell 11 and a cover 12. The shell 11 is provided with a mounting cavity 111 and an avoiding opening 112 in communication with the mounting cavity 111. The knife switch state receiver is mounted in the mounting cavity 111, and the wiring terminal 20 of the knife switch state receiver is exposed to the avoiding opening 112. The cover 12 is detachably connected with the shell 11, and covers at least part of the avoiding opening 112 to cover the operating position 21 of the cable fixed by the wiring terminal 20.

[0035] The shell 11 and the cover 12 of the shell assembly 10 are generally made of plastic material, which not only can reduce the manufacturing cost of the shell assembly 10, but also can have good insulation effect. The mounting cavity 111 of the shell 11 can be used for mounting the knife switch state receiver and other electronic components of the knife switch state receiving device 100, so as to form a protective package for the electronic components and prevent the interference of external factors.

[0036] The electronic components such as the knife switch state receiver can be mounted in the mounting cavity 111 by screw connection, clamping or the like. In order to facilitate the mounting of the electronic components such as the knife switch state receiver in the mounting cavity 111, the specific profile of the mounting cavity 111 can be set according to the outer profile of the electronic components such as the knife switch state receiver.

[0037] The shell assembly 10 is generally provided with a buckle to generally buckle the knife switch state receiving device 100 on the guide rail of the control cabinet. In some specific examples, the shell 11 is composed of at least two parts connected with each other, so as to facilitate the installation and production of the shell 11.

[0038] It can be understood that when the wiring terminal 20 of the blade state receiver is wired, the corresponding blade state signal line needs to be connected to the wiring position 22 of the corresponding wiring terminal 20, and then a tool is used to fix the operation position 21 of the wiring terminal 20 to lock the blade state signal line. The wiring terminal 20 is exposed to the avoiding opening 112, which is designed to facilitate the wiring operation of the wiring terminal 20 of the blade state receiver.

[0039] The blade state receiving device 100 provided by the embodiment of the application is fixedly installed on the control cabinet, the cover 12 is detached from the shell 11, the blade state signal line is introduced into the installation cavity 111 from the avoiding opening 112 and connected to the wiring position 22 of the wiring terminal 20, the tool used for wiring enters the installation cavity 111 through the avoiding opening 112, the operation position 21 of the wiring terminal 20 is operated to lock the blade state signal line to the wiring position 22, and the tool used for wiring exits the installation cavity 111 through the avoiding opening 112. For this, the avoiding opening 112 corresponding to the operation position 21 is not blocked by objects, and finally the cover 12 is installed on the shell 11 to shield the operation position 21 of the wiring terminal 20 and protect the wiring terminal 20. It can be seen that after the blade state signal line is installed on the wiring position 22, the cover 12 can cover the operation position 21 to protect the operation position 21 of the wiring terminal 20, so that the operation position 21 of the wiring terminal 20 is not damaged due to external factors. At the same time, the cover 12 covers the operation position 21, which improves the integrity and aesthetics of the blade state receiving device 100.

[0040] In some examples, as shown in Figure 2 and Figure 7 The avoiding opening 112 includes two first and second opening parts 1121 and 1122 that are in communication, and the plane where the first opening part 1121 is located is adjacent to the plane where the second opening part 1122 is located. The wiring terminal 20 has an operation position 21 and a wiring position 22 for connecting a cable, the operation position 21 is arranged opposite to the first opening part 1121, the wiring position 22 is arranged opposite to the second opening part 1122, and the cover 12 is detachably connected to the shell 11 to cover the first opening part 1121.

[0041] In this way, the tool for wiring can enter or exit the installation cavity 111 through the first opening part 1121, the knife switch state signal line can be introduced into the installation cavity 111 through the second opening part 1122 and connected to the wiring position 22, and the plane where the first opening part 1121 is located is adjacent to the plane where the second opening part 1122 is located, that is, the tool for wiring and the knife switch state signal line can enter the installation cavity 111 in different planes, reducing the mutual interference between the tool for wiring and the knife switch state signal line, and facilitating the wiring operation on the wiring terminal 20. Moreover, the cover 12 covers the first opening part 1121, and the interference of the knife switch state signal line on the cover 12 when the cover 12 covers the operation position 21 is avoided.

[0042] In Figure 7 In the embodiment shown, the plane where the first opening part 1121 is located and the plane where the second opening part 1122 is located are also vertically arranged, and in this way, the wiring operation on the wiring terminal 20 is further facilitated.

[0043] It is considered that in some application scenarios, the wiring terminal 20 needs to be observed or debugged, and the cover 12 is relatively slow to disassemble.

[0044] In some examples, as Figures 2 to 6 shown, the cover 12 is movably connected with the shell 11 when installed in the shell 11, and the cover 12 moves relative to the shell 11 to cover the operation position 21 of the wiring terminal 20 or is dislocated from the avoiding opening 112. In this way, the cover 12 is quickly opened by the operator to observe the wiring terminal 20 or debug the wiring terminal 20.

[0045] Of course, in some application scenarios, when the knife switch state receiving device 100 is installed in a relatively spacious position, the cover 12 can also be driven to move relative to the shell 11 to be dislocated from the avoiding opening 112, and then the wiring terminal 20 is operated, and after the wiring operation is completed, the cover 12 is driven to move relative to the shell 11 again to cover the operation position 21 of the wiring terminal 20.

[0046] In some examples, as Figures 2 to 6 shown, the cover 12 is rotatably connected with the shell 11 when installed in the shell 11, and the cover 12 rotates towards the direction close to the avoiding opening 112 to cover the operation position 21 of the wiring terminal 20, and the cover 12 rotates towards the direction away from the avoiding opening 112 to be dislocated from the avoiding opening 112. In this way, the cover 12 is further quickly opened by the operator.

[0047] In some examples, as Figures 2 to 6As shown, the cover body 12 comprises a cover plate 121 and a connecting arm 122, the connecting arm 122 has a first segment 1221 and a second segment 1222 connected with each other, the first segment 1221 is fixedly connected with the cover plate 121 at an end away from the second segment 1222, and the second segment 1222 is detachably rotatably connected with the shell 11 at an end away from the first segment 1221 and is arranged in a spaced manner with the end of the first segment 1221 away from the second segment 1222, so as to form an avoiding space between the first segment 1221 and the second segment 1222.

[0048] It should be noted that the cover plate 121 and the connecting arm 122 are usually made by an integral molding process, for example, injection molding, and in some examples, the connecting arm 122 is integrally molded, and the first segment 1221 and the second segment 1222 are divided according to the direction of extension, and there is no obvious connecting seam between the first segment 1221 and the second segment 1222.

[0049] It can be understood that in the embodiment, the main function of the cover plate 121 is to cover the avoiding opening 112, i.e. to cover the first opening part 1121 mentioned above, and the main function of the connecting arm 122 is to connect with the shell 11, i.e. to achieve detachable rotary connection between the connecting arm 122 and the shell 11.

[0050] In this way, it is designed to make the cover body 12 rotate towards the direction away from the avoiding opening 112, and when the cover body 12 is out of position with the avoiding opening 112, the distance between the cover body 12 and the avoiding opening 112 is farther, i.e. there is a better field of view to observe the terminal 20 or a larger operation space to operate the terminal 20.

[0051] In Figure 2 In the embodiment shown, the cover body 12 comprises two connecting arms 122, and in other examples, the cover body 12 can comprise three connecting arms 122, which are not limited here.

[0052] In some examples, as Figures 2 to 7 As shown, the shell 11 is also provided with a mounting hole 113 communicating with the mounting cavity 111, the cavity wall of the mounting cavity 111 is provided with a rotating shaft 1111, the end of the second segment 1222 away from the first segment 1221 is provided with a rotating connecting part 1223, and the rotating connecting part 1223 extends into the mounting cavity 111 through the mounting hole 113 and is detachably rotatably connected with the rotating shaft 1111.

[0053] In this way, it is designed to optimize the specific structure of the shell 11 and the cover body 12, so that when the cover body 12 covers part of the avoiding opening 112, the connecting arm 122 can be accommodated in the mounting cavity 111 through the mounting hole 113, avoiding the connecting arm 122 exposed on the outer surface of the shell 11, further improving the integrity and aesthetics of the knife switch state receiving device 100. And it can avoid damage to the connecting arm 122 caused by external factors.

[0054] In some examples, as shown in Figure 4 and Figure 5 The rotating connecting part 1223 includes two opposite elastic arms 1224, and a containing space 1225 is formed between the two elastic arms 1224 for containing the rotating shaft 1111. The rotating shaft 1111 can enter or exit the containing space 1225 under the action of an external force.

[0055] In this way, the rotating connecting part 1223 is arranged to facilitate the installation and removal of the cover body 12 on the shell 11 while achieving the rotating connection between the cover body 12 and the shell 11, thereby improving the efficiency of the installation and removal of the cover body 12.

[0056] In other examples, the rotating connecting part 1223 is provided with a connecting hole, and the first segment 1221 and / or the second segment 1222 of the connecting arm 122 is elastic, so as to achieve the detachable rotating connection between the rotating connecting part 1223 and the rotating shaft 1111 by elastically extruding the connecting arm 122 to make the connecting hole and the rotating shaft 1111 fit together.

[0057] In some examples, as shown in Figures 2 to 6 The second segment 1222 is also arranged perpendicularly to the cover plate 121, and the hole wall of the mounting hole 113 is provided with a first limiting protrusion 1131. When the cover body 12 is misaligned with the avoiding opening 112, the first limiting protrusion 1131 abuts against the second segment 1222, so that the cover body 12 remains in the misaligned state with the avoiding opening 112.

[0058] In this way, the cover body 12 is driven to rotate, and after the cover body 12 is misaligned with the avoiding opening 112, the first limiting protrusion 1131 abuts against the second segment 1222, so that the cover body 12 can remain stationary under no external force or under a slight external force, and the cover body 12 remains in the misaligned state with the avoiding opening 112, thereby facilitating the observation, debugging, and wiring of the wiring terminal 20 by the operator.

[0059] In some examples, as shown in Figure 4 The first limiting protrusion 1131 also extends in the direction in which the cover body 12 is removed or installed on the shell 11, so as to slidably abut against the second segment 1222 when the cover body 12 is removed or installed on the shell 11, thereby guiding the removal or installation of the cover body 12 and facilitating the installation of the cover body 12, so that the cover body 12 can be blindly installed on the shell 11.

[0060] In some examples, as shown in Figure 5 and Figure 7As shown, the cover plate 121 is further provided with a second limiting protrusion 1211. When the cover body 12 covers the operating position 21 of the terminal 20, the second limiting protrusion 1211 abuts against the hole wall of the mounting hole 113, so that the cover body 12 remains in the state of covering the operating position 21 of the terminal 20.

[0061] In this way, the cover body 12 is driven to rotate, so that after the cover body 12 covers the terminal position 22, the second limiting protrusion 1211 abuts against the hole wall of the mounting hole 113, so that the cover body 12 remains stationary without external force or with slight external force, so that the cover body 12 remains in the state of covering the operating position 21 of the terminal 20, thereby protecting the operating position 21.

[0062] In some examples, the cover body 12 is in sliding connection with the shell 11 when mounted in the shell 11. The cover body 12 slides towards the direction close to the avoiding opening 112 to cover the operating position 21 of the terminal 20, and slides towards the direction away from the avoiding opening 112 to be out of position with the avoiding opening 112. In this way, it is further convenient for the operator to quickly open the cover body 12.

[0063] Preferably, the cover body 12 is provided with a sliding groove on each side, and the shell 11 is provided with two guide rails on the two sides of the avoiding opening 112, which are arranged in one-to-one correspondence with the two sliding grooves, and the guide rails abut against the groove walls of the sliding grooves.

[0064] In other examples, the shell 11 is provided with two guide grooves on the two sides of the avoiding opening 112, and the cover body 12 is provided with a sliding block on each side, which are arranged in one-to-one correspondence with the two guide grooves, and the sliding blocks abut against the groove walls of the guide grooves.

[0065] In combination with the above description of the shell assembly 10, in an example, the shell 11 is provided with two avoiding openings 112, the shell assembly 10 includes two cover bodies 12 arranged in one-to-one correspondence with the two avoiding openings 112, and the knife switch state receiver also has two terminals 20 arranged in one-to-one correspondence with the two avoiding openings 112.

[0066] The above description is only optional embodiments of the present application, and does not limit the patent scope of the present application. Any equivalent structural transformation based on the content of the present application specification and drawings, or direct / indirect application in other related technical fields is included in the patent protection scope of the present application.

Claims

1. A switch state receiving device, characterized by comprising: The knife switch state receiving device comprises a housing assembly and a knife switch state receiver, the housing assembly comprises a housing and a cover, the housing is provided with a mounting cavity and an avoiding opening communicated with the mounting cavity, the knife switch state receiver is mounted in the mounting cavity, and a wiring terminal of the knife switch state receiver is exposed to the avoiding opening, the cover is detachably connected with the housing, and covers at least part of the avoiding opening to cover the operating position of the wiring terminal fixing cable.

2. The switch state receiving apparatus of claim 1, wherein The avoiding opening comprises two first opening parts and second opening parts in communication, and the plane where the first opening part is located is adjacent to the plane where the second opening part is located. The wiring terminal has the operating position and a wiring position for cable access, the operating position is arranged opposite to the first opening part, and the wiring position is arranged opposite to the second opening part, and the cover is detachably connected with the housing to cover the first opening part.

3. The blade status receiving apparatus of claim 1, wherein When the cover is mounted on the housing, the cover is movably connected with the housing, and the cover is moved relative to the housing to cover the operating position of the wiring terminal or is dislocated from the avoiding opening.

4. The switch state receiving apparatus of claim 3, wherein When the cover is mounted on the housing, the cover is rotatably connected with the housing, and the cover is rotated towards the direction close to the avoiding opening to cover the operating position of the wiring terminal, and the cover is rotated towards the direction away from the avoiding opening to be dislocated from the avoiding opening.

5. The switch state receiving apparatus of claim 4, wherein The cover comprises a cover plate and a connecting arm, the connecting arm has a first segment and a second segment connected with each other, one end of the first segment away from the second segment is fixedly connected with the cover plate, and the other end of the second segment away from the first segment is rotatably connected with the housing and is spaced apart from the one end of the first segment away from the second segment to form an avoiding space between the first segment and the second segment.

6. The switch state receiving apparatus of claim 5, wherein The housing is further provided with a mounting hole communicated with the mounting cavity, a rotating shaft is arranged on the cavity wall of the mounting cavity, the other end of the second segment away from the first segment is provided with a rotating connecting part, and the rotating connecting part extends into the mounting cavity through the mounting hole and is rotatably connected with the rotating shaft.

7. The switch state receiving apparatus of Claim 6, wherein The rotating connecting part comprises two oppositely arranged elastic arms, an accommodating space for accommodating the rotating shaft is formed between the two elastic arms, and the rotating shaft can enter or exit the accommodating space under the action of external force.

8. The switch state receiving apparatus of claim 6, wherein The second segment is further arranged perpendicularly to the cover plate, a first limiting protrusion is protruded on the hole wall of the mounting hole, and the first limiting protrusion is in abutment with the second segment when the cover is dislocated from the avoiding opening, so that the cover is kept in the state of being dislocated from the avoiding opening.

9. The switch state receiving apparatus of claim 6, wherein The cover plate is further provided with a second limiting protrusion, the second limiting protrusion is in abutment with the hole wall of the mounting hole when the cover covers the operating position of the wiring terminal, so that the cover is kept in the state of covering the operating position of the wiring terminal.

10. The apparatus according to claim 3, wherein the apparatus is configured to receive the state of the switch from the switch. The cover is provided with a sliding groove on each opposite side, the housing is provided with two guide rails on the two sides of the avoiding opening, and the two guide rails and the two sliding grooves are arranged in one-to-one correspondence. When the cover is installed on the shell, the guide rail abuts against the slot wall of the sliding slot, the cover slides towards the direction close to the avoiding opening to cover the operating position of the terminal, and the cover slides towards the direction away from the avoiding opening to be dislocated from the avoiding opening.

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