Microswitch protection device

Abstract

The utility model provides a microswitch protection device which comprises a shell and a cover cap, an installation groove used for installing a microswitch is arranged in the shell, the cover cap detachably covers a groove opening of the installation groove, an operation opening is formed in the side wall of the shell and penetrates through the side wall of the shell, and the microswitch protection device further comprises a shielding plate and first sealant. The shielding plate is detachably arranged in the shell and partially shields the operation opening, and the operation opening is filled with the first sealant. The operation opening is shielded by the shielding plate, so that a gap between the microswitch and the inner wall of the operation opening is reduced, the gap between the microswitch and the operation opening can be smoothly blocked by the first sealant, the sealing performance between the operation opening and the microswitch is improved, external rainwater is prevented from entering the operation opening, and the service life of the microswitch is prolonged. The protection performance of the microswitch is improved, the situation of short circuit or poor contact of the microswitch caused by water, dust and other impurities is prevented, and the fault rate of the microswitch is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of electric power equipment, specifically relates to a microswitch protection device. BACKGROUND

[0002] In the existing power transmission and distribution system, microswitches are often used in disconnectors. The microswitches have different functions when arranged at different positions in the disconnector. For example, when installed on the disconnector, the microswitches are used to monitor the state of the switch. When the disconnector operates, the contacts of the microswitches change state, thereby providing an electrical feedback signal of mechanical action. This state feedback is particularly important for an automated control system, which can ensure the correct operation of the disconnector and the safety of the system. The microswitches can also serve as auxiliary components of the disconnector, and the operation of a remote or automatic control system can be controlled through the signals output by the microswitches. For example, the signals of the microswitches can trigger a relay or other control elements to achieve remote control of the disconnector.

[0003] The disconnector is generally installed outdoors, so it is easily eroded in rainy or windy weather. Once foreign matter or rainwater enters the disconnector, it can cause the disconnector to burn out or have poor contact, which seriously affects the normal operation of the high-voltage line. The commonly used method is to install a protective shell for the microswitch, install the microswitch in the protective shell, and set an operating port on the protective shell so that the operating handle of the microswitch extends from the operating port. Due to the special structure of the operating handle of the microswitch, the operating port needs to be set relatively large. After the microswitch is installed, there is a large gap between the microswitch and the inner wall of the operating port. In use, rainwater splashing on the operating handle of the microswitch can easily enter the microswitch along the operating handle, thereby causing a short circuit in the internal circuit of the microswitch and causing the microswitch to burn out. In addition, the large gap between the microswitch and the inner wall of the operating port can allow rainwater to directly enter the protective shell, which cannot play a protective role. The existing construction site uses glue to seal the gap, but because the gap is too large, the glue is prone to collapse when applied, which cannot achieve good sealing effect.

[0004] In view of the above, there is an urgent need for a microswitch protection device to solve or at least partially solve the problems in the prior art. UTILITY MODEL CONTENTS

[0005] The utility model aims to provide a microswitch protection device, which aims to solve the problem that the existing microswitch is easily flooded in the use scenario, causing the microswitch to burn out or have poor contact. The specific technical solution is as follows:

[0006] The micro switch protection device comprises a shell and a cover, the shell is provided with a mounting groove for mounting the micro switch, the cover is detachably covered on the groove opening of the mounting groove, the side wall of the shell is provided with an operation port, the operation port is provided through the side wall of the shell, further comprising a shielding plate and a first sealing glue, the shielding plate is detachably arranged in the shell, and the shielding plate is partially shielded to the operation port, and the first sealing glue is filled in the operation port.

[0007] Preferably, further comprising a second sealing glue and a first fastener, the second sealing glue is arranged around the outer periphery of the groove opening of the mounting groove, and the second sealing glue is arranged between the shell and the cover, and the cover is fixedly connected to the shell through the first fastener.

[0008] Preferably, further comprising a second fastener, the shell is provided with an elongated hole arranged along the height direction of the shell, the second fastener is arranged through the elongated hole, and the shielding plate is fixedly connected to the shell through the second fastener.

[0009] Preferably, the inner wall of the shell is provided with a slot, the slot is arranged on both sides of the operation port, the slot is arranged along the height direction of the shell, and the shielding plate is arranged by being inserted into the slot.

[0010] Preferably, the shell is provided with a wire port, the wire port is provided through the side wall of the shell, further comprising a wire protection assembly, the wire protection assembly comprises a bellows, a connecting sleeve and a circular nut, the connecting sleeve is provided with a through hole, the both ends of the through hole are communicated with the inner and outer sides of the shell, the first end of the connecting sleeve is provided with a boss, the second end of the connecting sleeve is provided with external threads, the second end of the connecting sleeve is arranged in the wire port and extends into the shell, and the circular nut is threadedly connected to the second end of the connecting sleeve, so that the side wall of the shell is clamped between the boss and the circular nut, one end of the bellows is inserted into the through hole of the connecting sleeve, and the other end of the bellows extends outward.

[0011] Preferably, the wire protection assembly further comprises a sealing gasket, the sealing gasket is sleeved on the connecting sleeve, and the sealing gasket is arranged between the boss and the outer wall of the shell.

[0012] Preferably, the inside of the shell is arranged with a first mounting hole, the first mounting hole is a through hole, and a plurality of first mounting holes are arranged.

[0013] Preferably, further comprising a gasket and a magnetic stopper, the gasket is fixedly connected to the inner wall of the shell, the inner hole of the gasket is correspondingly arranged with the first mounting hole, the magnetic stopper is attracted to the gasket, and the magnetic stopper shields the inner hole of the gasket, and the gasket is a flexible gasket.

[0014] Preferably, the gasket is provided with a counterbore, and the magnetic stopper is embedded in the counterbore.

[0015] Preferably, the cover is provided with an inclined plate inclined towards the shell, and the inclined plate is arranged around the cover.

[0016] Preferably, the side of the shell in contact with the second sealant is provided with a groove, the groove is arranged around the slot of the mounting slot, and the second sealant is partially embedded in the groove.

[0017] Preferably, a sealing layer is fixed to the side of the shielding plate close to the inner wall of the shell, and the sealing layer is made of one of rubber, silicone and polyurethane.

[0018] Preferably, the wire protection assembly further comprises a third sealant, and the third sealant is filled between the corrugated pipe and the connecting sleeve.

[0019] Preferably, a plurality of second mounting holes are arranged in the shell, the second mounting holes are threaded holes, and the second mounting holes are blind holes.

[0020] The technical scheme of the utility model has the following beneficial effects:

[0021] The shielding plate shields the operation opening, reduces the gap between the micro switch and the inner wall of the operation opening, and enables the first sealant to smoothly seal the gap between the micro switch and the operation opening, thereby improving the sealing performance between the operation opening and the micro switch, preventing external rainwater from entering, improving the protection performance of the micro switch, preventing the micro switch from being short-circuited or having poor contact due to water and dust and other impurities, and reducing the failure rate of the micro switch.

[0022] In addition to the purposes, features and advantages described above, the utility model has other purposes, features and advantages. Hereinafter, the utility model will be described in detail with reference to the drawings Figures 1-10 The utility model will be described in further detail. DETAILED DESCRIPTION

[0023] The accompanying drawings, which form a part of this application, are included to provide a further understanding of the application, and are incorporated herein for purposes of

[0024] Figure 1 is a whole structure schematic view of a micro switch protection device of the application;

[0025] Figure 2 is one of internal structure schematic views of a micro switch protection device of the application;

[0026] Figure 3 is Figure 2 is an enlarged view of A in figure 6;

[0027] Figure 4 is the second internal structure schematic view of the micro switch protection device of the application;

[0028] Figure 5 isFigure 4 Enlarged view at B;

[0029] Figure 6 is one of the internal structure schematic diagram of the micro-motion switch protection device after installing the micro-motion sensor in the micro-motion switch protection device of the present application;

[0030] Figure 7 is the exploded view of the micro-motion switch protection device of the present application;

[0031] Figure 8 is the second internal structure schematic diagram of the micro-motion switch protection device after installing the micro-motion sensor in the micro-motion switch protection device of the present application;

[0032] Figure 9 is the internal structure schematic diagram of another embodiment of the micro-motion switch protection device of the present application;

[0033] Figure 10 is Figure 9 Enlarged view at C.

[0034] Wherein, 1, the shell; 11, the installation groove; 12, the operation port; 13, the recess; 14, the long strip-shaped hole; 15, the slot; 16, the wire port; 17, the first mounting hole; 18, the second mounting hole; 19, the bearing table; 2, the cover; 21, the inclined plate; 3, the shielding plate; 31, the sealing layer; 4, the first sealing glue; 5, the second sealing glue; 6, the first fastener; 7, the second fastener; 8, the wire protection assembly; 81, the bellows; 82, the connecting sleeve; 821, the boss; 83, the round nut; 84, the third sealing glue; 85, the sealing gasket; 9, the washer; 91, the counterbore; 10, the magnetic baffle; 20, the micro-motion switch. DETAILED DESCRIPTION

[0035] In order to facilitate the understanding of the present application, the present application will be described more fully below, and the preferred embodiments of the present application are given. However, the present application can be realized in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present application more thorough and comprehensive.

[0036] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the present application belongs. The terminology used in the description of the present application herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the present application.

[0037] Embodiment:

[0038] In the control circuit of high-voltage line, micro switch 20 is often used, for example, in the position positioning of operating rod in disconnecting switch, in the process of installation, first, micro switch 20 is installed in shell 1, and the position of shell 1 on disconnecting switch is adjusted until micro switch 20 is located at the set position on disconnecting switch. At this time, micro switch 20 plays a role in positioning in disconnecting switch, that is, when the operating rod moves to the set position, it pushes the operating arm of micro switch 20 to rotate, so that micro switch 20 acts, micro switch 20 sends a signal to the control circuit of disconnecting switch, and the control circuit controls the operating rod of disconnecting switch to stop moving or change the moving direction.

[0039] Referring to Figures 1-10 The embodiment provides a micro switch protection device, which comprises a shell 1 and a cover 2, the shell 1 is provided with an installation groove 11 for installing a micro switch 20, the cover 2 is detachably covered on the slot opening of the installation groove 11, the side wall of the shell 1 is provided with an operating port 12, the operating port 12 is arranged through the side wall of the shell 1, further comprising a shielding plate 3 and a first sealing glue 4, the shielding plate 3 is detachably arranged in the shell 1, and the shielding plate 3 is partially shielded to the operating port 12, and the first sealing glue 4 is filled in the operating port 12.

[0040] It should be noted that, because of the special structure of the operating arm of micro switch 20 (the front end of the operating arm is provided with an upwardly protruding roller for reducing the friction in the operation process to achieve the effect of sensitive operation), the operating port 12 on the shell 1 needs to be set larger, and after the micro switch 20 is installed in the shell 1, the gap between the operating arm of the micro switch 20 and the operating port 12 is larger, and rainwater is easy to enter from the gap.

[0041] Specifically, when installing the micro switch 20, the micro switch 20 is placed into the installation slot 11 in the shell 1, and the operating arm of the micro switch 20 is arranged to extend from the operating port 12, the baffle 3 is installed in the shell 1, the relative position between the baffle 3 and the operating port 12 is moved, the operating port 12 is shielded by the baffle 3 as much as possible, that is, the gap between the micro switch 20 and the operating arm is reduced as much as possible, then the gap is completely sealed by the soft glue, and the first sealing glue 4 is formed after the soft glue solidifies, and the gap is sealed by the baffle 3 and the first sealing glue 4. Because the operating port 12 is shielded by the baffle 3, the gap between the micro switch 20 and the inner wall of the operating port 12 is reduced, so that the first sealing glue 4 can smoothly seal the gap between the micro switch 20 and the operating port 12, improve the sealing performance between the operating port 12 and the micro switch 20, prevent the entry of external rainwater, improve the protection performance of the micro switch 20, prevent the micro switch 20 from being short-circuited or having poor contact due to water and dust and other impurities, and reduce the failure rate of the micro switch 20. If the baffle 3 is not provided, the gap is directly sealed by the glue, on the one hand, the gap is large, and the glue cannot form a stable support during the coating process, which can easily cause the glue to collapse during the coating process, and the gap cannot be sealed, which can further cause the sealing of the gap to be difficult, and the sealing effect cannot be good. In addition, in order to adapt to the thermal expansion and contraction of the gap, the glue is generally soft glue, that is, the glue has a certain elasticity after solidification. If the gap is too large, the rigidity of the glue at the gap after solidification is weak, and the first sealing glue 4 can be easily deformed under external force and fall off, which is not conducive to sealing. The provision of the baffle 3 can provide support for the first sealing glue 4, improve the overall rigidity of the first sealing glue 4 after the glue solidifies, and prevent the first sealing glue 4 from falling off.

[0042] As a more preferred embodiment, the second sealing glue 5 and the first fastener 6 are further included, the second sealing glue 5 is arranged around the outer periphery of the slot opening of the installation slot 11, and the second sealing glue 5 is arranged between the shell 1 and the cover 2. The cover 2 is fixedly connected to the shell 1 by the first fastener 6.

[0043] Specifically, the side of the shell 1 in contact with the second sealant 5 is provided with a groove 13, the groove 13 is arranged around the slot of the mounting groove 11, the second sealant 5 is partially embedded in the groove 13, and the groove 13 is provided with a plurality of grooves. In this embodiment, the first fastener 6 is a bolt, and the cover 2 is locked on the shell 1 by the cooperation of the bolt and the nut. In some other embodiments, the first fastener 6 can also be a screw, a rivet or other components or structures that can play a fastening role. In this embodiment, the second sealant 5 is formed after solidification by on-site application. In some other embodiments, a flexible pad can also be used instead, which can be made of one of rubber, silicone, polyurethane and other soft materials.

[0044] As can be understood, through the arrangement of the second sealant 5, after the first fastener 6 is fastened, the second sealant 5 is pressed between the cover 2 and the shell 1, and the gap between the cover 2 and the shell 1 is sealed by the second sealant 5, preventing external rainwater from entering the shell 1 from the gap between the cover 2 and the shell 1, thereby playing a waterproof role. The second sealant 5 is formed after solidification by applying glue, and in combination with the arrangement of the groove 13, the second sealant 5 is embedded in the groove 13, further improving the sealing effect.

[0045] As a preferred embodiment, the shielding plate 3 is fixed with a sealing layer 31 on the side close to the inner wall of the shell 1, and the sealing layer 31 is made of one of rubber, silicone, polyurethane and other materials.

[0046] As can be understood, through the arrangement of the sealing layer 31, when the shielding plate 3 is attached to the inner wall of the shell 1, the sealing layer 31 abuts against the inner wall of the shell 1, sealing the part of the operating port 12 shielded by the shielding plate 3, preventing external rainwater from entering from the gap between the shielding plate 3 and the shell 1.

[0047] As a preferred embodiment, it further includes a second fastener 7, the shell 1 is provided with an elongated hole 14 arranged along the height direction of the shell 1, and the second fastener 7 is arranged through the elongated hole 14, and the shielding plate 3 is fixedly connected to the shell 1 by the second fastener 7.

[0048] Specifically, the second fastener 7 is a screw, and the screw is used to fixedly connect the shielding plate 3 to the inner wall of the shell 1.

[0049] It can be understood that the second fastener 7 can be conveniently disassembled by setting the shielding plate 3, that is, the operating arm of the micro switch 20 is inserted into the operating port 12, and the shielding plate 3 can be conveniently installed in the shell 1 to partially shield the larger operating port 12. By setting the long strip-shaped through hole, the position of the shielding plate 3 along the length direction of the long strip-shaped through hole can be adjusted, so that the shielding plate 3 can shield the operating port 12 as much as possible, that is, the gap between the micro switch 20 and the inner wall of the operating port 12 is minimized after the shielding plate 3 is installed, so as to facilitate the sealing of the gap by glue.

[0050] As a more preferred embodiment, the shell 1 is provided with a slot 15 on the inner wall, the slot 15 is arranged on both sides of the operating port 12, and the slot 15 is arranged along the height direction of the shell 1. The shielding plate 3 is inserted into the slot 15.

[0051] It can be understood that by setting the slot 15, when the shielding plate 3 needs to be installed, it only needs to be inserted into the slot 15 for installation, which can quickly realize installation and disassembly. When the position of the shielding plate 3 needs to be adjusted, the relative position of the shielding plate 3 and the slot 15 only needs to be adjusted, which is convenient to adjust. When the shielding plate 3 is inserted into the slot 15, the slot 15 and the shielding plate 3 are in interference fit, that is, under the condition of interference fit, the shielding plate 3 can be moved and positioned at any position of the slot 15.

[0052] As a more preferred embodiment, the shell 1 is provided with a wire port 16, the wire port 16 penetrates the side wall of the shell 1, and further comprises a wire protection assembly 8, the wire protection assembly 8 comprises a corrugated pipe 81, a connecting sleeve 82 and a round nut 83, the connecting sleeve 82 is provided with a through hole, the both ends of the through hole are communicated with the inner and outer sides of the shell 1, the first end of the connecting sleeve 82 is provided with a boss 821, the second end of the connecting sleeve 82 is provided with external threads, the second end of the connecting sleeve 82 is arranged in the wire port 16 and extends into the shell 1, the round nut 83 is threadedly connected on the second end of the connecting sleeve 82, so that the side wall of the shell 1 is clamped between the boss 821 and the round nut 83, one end of the corrugated pipe 81 is inserted into the through hole of the connecting sleeve 82, and the other end of the corrugated pipe 81 extends outward.

[0053] It should be noted that although there are wireless micro switches 20 now, wired micro switches 20 are most widely used because of their low cost, good stability and low failure rate. By setting the wire port 16, the connecting wire of the micro switch 20 can be conveniently drawn out of the shell 1.

[0054] It can be understood that the microswitch 20 connecting line is protected by the arrangement of the corrugated pipe 81, and the corrugated pipe 81 is fixed by the connecting sleeve 82 and the round nut 83. During installation, the corrugated pipe 81 is sleeved on the connecting line of the microswitch 20, the connecting sleeve 82 is inserted into the connecting line port 16, the round nut 83 is installed in the shell 1 and locked, the connecting line of the microswitch 20 is inserted into the through hole of the connecting sleeve 82 and installed on the microswitch 20, and finally the corrugated pipe 81 is inserted into the through hole of the connecting sleeve 82.

[0055] As a preferred embodiment, the wire protection assembly 8 further comprises a sealing gasket 85, the sealing gasket 85 is sleeved on the connecting sleeve 82, and the sealing gasket 85 is arranged between the boss 821 and the outer wall of the shell 1.

[0056] It can be understood that after the round nut 83 is tightened, the sealing gasket 85 is clamped between the outer wall of the shell 1 and the boss 821, the sealing between the boss 821 and the shell 1 is achieved, and water between the boss 821 and the shell 1 is prevented.

[0057] As a preferred embodiment, the wire protection assembly 8 further comprises a third sealing glue 84, and the third sealing glue 84 is filled between the corrugated pipe 81 and the connecting sleeve 82.

[0058] It can be understood that the glue is filled between the corrugated pipe 81 and the connecting sleeve 82, and the third sealing glue 84 is formed after the glue solidifies, the gap between the connecting sleeve 82 and the corrugated pipe 81 is sealed by the third sealing glue 84, and external rainwater is prevented from entering.

[0059] As a preferred embodiment, a first mounting hole 17 is arranged in the shell 1, the first mounting hole 17 is a through hole, and a plurality of first mounting holes 17 are arranged.

[0060] It can be understood that through the arrangement of the first mounting hole 17, a bolt (not within the protection scope of the device) can be inserted into the first mounting hole 17, and the shell 1 can be conveniently fixed to the required position of the isolating switch through the bolt. A plurality of mounting holes are arranged, the stability of the shell 1 after installation is improved, and if only one bolt is installed, the shell 1 may rotate. Therefore, a plurality of bolts can be conveniently installed through the arrangement of the plurality of holes, and the shell 1 is prevented from rotating.

[0061] As a preferred embodiment, a gasket 9 and a magnetic stop sheet 10 are further included, the gasket 9 is fixedly connected to the inner wall of the shell 1, the inner hole of the gasket 9 is correspondingly arranged with the first mounting hole 17, the magnetic stop sheet 10 is attracted to the gasket 9, the inner hole of the gasket 9 is shielded by the magnetic stop sheet 10, and the gasket 9 is a flexible gasket.

[0062] In particular, the gasket 9 is also made of magnetic material, such as magnetic rubber (a known material and not an improvement thereof).

[0063] It can be understood that when the shell 1 is fixed on the frame of the isolating switch by using external bolts passing through the first mounting holes 17, the bolts are abutted against the gasket 9 by the nuts on the bolts when tightened, so as to realize the sealing of the first mounting holes 17 and prevent rainwater from entering from the first mounting holes 17.

[0064] Further, the gasket 9 is provided with a counterbore 91, and the magnetic baffle 10 is embedded in the counterbore 91.

[0065] It can be understood that a plurality of first mounting holes 17 are provided, but not all of the first mounting holes 17 are provided with bolts during installation. Therefore, the first mounting holes 17 are closed by the magnetic baffle 10 in the case that no bolt is installed, so as to prevent external rainwater from entering from the first mounting holes 17. The magnetic baffle 10 is positioned by the counterbore 91, so as to prevent the magnetic baffle 10 from moving and causing the first mounting holes 17 to be not tightly sealed. One magnetic baffle 10 is provided for each gasket 9 during production and manufacturing, and the magnetic baffle 10 on the gasket 9 can be removed when a bolt needs to be installed in the first mounting hole 17 to fix the shell 1.

[0066] As a preferred embodiment, the cover 2 is provided with an inclined plate 21 inclined towards the shell 1, and the inclined plate 21 is arranged around the cover 2.

[0067] It can be understood that because the cover 2 is often arranged at the top of the entire device during installation, the inclined plate 21 arranged around the cover 2 can guide rainwater, so as to prevent the rainwater from flowing to the gap between the cover 2 and the shell 1 along the side wall of the cover 2 and the lower part of the cover 2 when flowing downward.

[0068] As a preferred embodiment, the shell 1 is provided with a bearing table 19 protruding upward, and the bearing table 19 is provided with a second mounting hole 18. In this embodiment, the second mounting hole 18 is a threaded hole, and the micro switch 20 is fixedly connected to the bearing table 19 by a screw and the threaded hole. The second mounting hole 18 is a blind hole, which can prevent external rainwater from entering the shell 1. Of course, in some embodiments, the second mounting hole 18 can also be a through hole, and the micro switch 20 is fixed by a bolt passing through the through hole. The end of the bolt outside the shell 1 is provided with a rubber pad, which can prevent external rainwater from entering the shell 1 from the second mounting hole 18.

[0069] The above merely describes preferred embodiments of the present application and is not intended to limit the present application. For those skilled in the art, the present application can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A microswitch guard device, characterized by: The shell (1) is provided with a mounting groove (11) for mounting a micro switch (20), and the cover (2) is detachably covered on the slot opening of the mounting groove (11). The side wall of the shell (1) is provided with an operation port (12) penetrating through the side wall of the shell (1), Further comprising a shielding plate (3) and a first sealing glue (4), the shielding plate (3) is detachably arranged in the shell (1), and the shielding plate (3) is partially shielded to the operation port (12), and the first sealing glue (4) is filled in the operation port (12).

2. The micro switch protection device according to claim 1, further comprising a second sealing glue (5) and a first fastener (6), the second sealing glue (5) is arranged around the outer periphery of the slot opening of the mounting groove (11), and the second sealing glue (5) is arranged between the shell (1) and the cover (2), and the cover (2) is fixedly connected to the shell (1) by the first fastener (6).

3. The micro switch protection device according to claim 1, further comprising a second fastener (7), the shell (1) is provided with an elongated hole (14) arranged along the height direction of the shell (1), the second fastener (7) is arranged through the elongated hole (14), and the shielding plate (3) is fixedly connected to the shell (1) by the second fastener (7).

4. The micro switch protection device according to claim 1, wherein the inner wall of the shell (1) is provided with a slot (15), the slot (15) is arranged on both sides of the operation port (12), the slot (15) is arranged along the height direction of the shell (1), and the shielding plate (3) is arranged by being inserted into the slot (15).

5. The micro switch protection device according to any one of claims 3-4, wherein the shell (1) is provided with a wire port (16) penetrating through the side wall of the shell (1), Further comprising a wire protection assembly (8), the wire protection assembly (8) comprises a bellows (81), a connecting sleeve (82) and a round nut (83), the connecting sleeve (82) is provided with a through hole, both ends of the through hole are communicated with the inner and outer sides of the shell (1), a boss (821) is arranged at the first end of the connecting sleeve (82), the second end of the connecting sleeve (82) is provided with external threads, the second end of the connecting sleeve (82) is arranged in the wire port (16) and extends into the shell (1), the round nut (83) is threadedly connected to the second end of the connecting sleeve (82), so that the side wall of the shell (1) is clamped between the boss (821) and the round nut (83), one end of the bellows (81) is inserted into the through hole of the connecting sleeve (82), and the other end of the bellows (81) extends outward.

6. The micro switch protection device according to claim 5, wherein ​ ​ ​ ​ The wire protection assembly (8) further comprises a sealing gasket (85), which is sleeved on the connecting sleeve (82) and arranged between the boss (821) and the outer wall of the shell (1).

7. The micro switch protection device according to any one of claims 1-3, characterized in that: The shell (1) is internally arranged with a first mounting hole (17), which is a through hole, and a plurality of first mounting holes (17) are arranged.

8. The micro switch protection device according to claim 7, characterized in that: Further comprising a gasket (9) and a magnetic baffle (10), the gasket (9) is fixedly connected to the inner wall of the shell (1), the inner hole of the gasket (9) is correspondingly arranged with the first mounting hole (17), the magnetic baffle (10) is attracted to the gasket (9), and the magnetic baffle (10) shields the inner hole of the gasket (9), and the gasket (9) is a flexible gasket.

9. The micro switch protection device according to claim 8, characterized in that: The gasket (9) is provided with a counterbore (91), and the magnetic baffle (10) is embedded in the counterbore (91).

10. The micro switch protection device according to any one of claims 1-3, characterized in that: The cover (2) is arranged with an inclined plate (21) inclined towards the shell (1), and the inclined plate (21) is arranged around the cover (2).

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