Explosion-proof switch and explosion-proof electric appliance

Abstract

The utility model provides an explosion-proof switch and an explosion-proof electric appliance, and the switch comprises a first protection housing which is provided with a first accommodation cavity; the switch element is arranged on the first protective shell and is accommodated in the first accommodating cavity; the second protective shell is arranged at one end of the first protective shell and located on the outer side of the first protective shell, the second protective shell is provided with a second containing cavity, and the switch element is contained in the second containing cavity; and the button is assembled on the second protective shell in a sliding manner and is accommodated in the second accommodating cavity, and the button can slide to be in contact with or separated from the switch element so as to switch on or switch off the switch element. According to the explosion-proof switch, the switch element is arranged in the first protective shell and the second protective shell, and the button is arranged in the second protective shell, so that the explosion-proof switch has impact-resistant and explosion-proof functions, and the cooperative use mode between the explosion-proof switch and an explosion-proof electric appliance can be simplified.

Description

Technical Field

[0001] The utility model relates to the technical field of explosion-proof electrical appliances, in particular to an explosion-proof switch and an explosion-proof electrical appliance. Background Art

[0002] In the related art, explosion-proof electrical appliances (such as lamps and meters, etc.) are started and closed by using a push-button switch during use. However, the push-button switch generally does not have the function of anti-impact explosion protection. In order to ensure the explosion-proof ability of the explosion-proof electrical appliance, a receiving cavity and a cover plate are provided on the explosion-proof electrical appliance. The push-button switch is installed in the receiving cavity and covered with the cover plate. This setting method will make the combined use of the push-button switch and the explosion-proof electrical appliance more complicated. Summary of the Utility Model

[0003] The technical problem to be solved by the utility model is to provide an explosion-proof switch and an explosion-proof electrical appliance, aiming at solving the problem that the push-button switch in the related art does not have the function of anti-impact explosion protection.

[0004] To solve the above technical problem, the first aspect of the utility model provides an explosion-proof switch, including:

[0005] A first protective shell provided with a first receiving cavity;

[0006] A switch element disposed on the first protective shell and received in the first receiving cavity;

[0007] A second protective shell disposed at one end of the first protective shell and located outside the first protective shell. The second protective shell is provided with a second receiving cavity, and the switch element is received in the second receiving cavity; and,

[0008] A button slidably assembled on the second protective shell and received in the second receiving cavity. The button can slide to contact or separate from the switch element to turn on or off the switch element.

[0009] Optionally, a first connection structure is provided on the inner wall of the first receiving cavity, a second connection structure is provided on the switch element, and the first connection structure is connected to the second connection structure.

[0010] Optionally, the first connection structure and the second connection structure are threadedly connected.

[0011] Optionally, a first limiting boss is provided on the outer side of the switch element, and the first limiting boss abuts against the end of the first protective shell.

[0012] Optionally, a third connection structure is provided on the first protective shell, a fourth connection structure is provided on the inner wall of the second receiving cavity, and the third connection structure is connected to the fourth connection structure.

[0013] Optionally, the third connection structure is threadedly connected to the fourth connection structure.

[0014] Optionally, a second limiting boss is provided on the inner wall of the second accommodation cavity, and the second limiting boss abuts against one end of the switch element away from the first protective case.

[0015] Optionally, the second accommodation cavity penetrates through the end face of the second protective case to form a relief hole, the button passes through the relief hole, and the button is provided with light transmission.

[0016] Optionally, a third limiting boss is formed by protruding along the radial direction on the inner wall of the relief hole, a fourth limiting boss is provided on the outer side of the button, and the fourth limiting boss is received in the second accommodation cavity;

[0017] Wherein, when the button slides to contact or separate from the switch element, the fourth limiting boss and the third limiting boss are spaced apart or in contact with each other.

[0018] In a second aspect of the present invention, an explosion-proof electrical appliance is provided, including the explosion-proof switch and the appliance body as described in any one of the above, the explosion-proof switch is disposed on the appliance body, and the explosion-proof switch is electrically connected to the appliance body.

[0019] Compared with the related art, the beneficial effects of an explosion-proof switch and an explosion-proof electrical appliance in the present invention are as follows: by arranging the switch element in the first protective case and the second protective case, and arranging the button in the second protective case, the switch element and the button can be protected by the protective case, so that when the explosion-proof switch is impacted by energy, the impacts on the switch element and the button are small, thereby enabling the explosion-proof switch to have an impact-resistant explosion-proof function. Therefore, when installed on the appliance body of the explosion-proof electrical appliance, there is no need to perform explosion-proof treatment on the explosion-proof switch again. When operating the explosion-proof switch, only the button needs to be pressed without other operations, which can simplify the cooperation and use mode between the explosion-proof switch and the explosion-proof electrical appliance. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the related art, the following will briefly introduce the drawings required for use in the description of the embodiments or the related art. Obviously, the following drawings are only some embodiments of the present invention. For those skilled in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0021] Figure 1 is a schematic structural diagram of an internal locking explosion-proof switch provided by the present invention;

[0022] Figure 2 is a cross-sectional view of an internal locking explosion-proof switch provided by the present invention;

[0023] Figure 3 It is a schematic structural diagram of the externally locked explosion-proof switch provided by the present utility model;

[0024] Figure 4 It is a cross-sectional view of the externally locked explosion-proof switch provided by the present utility model.

[0025] In the drawings, each reference numeral represents: 1. First protective shell; 11. Main body part; 111. First accommodating cavity; 112. First connection structure; 113. Third connection structure; 12. Connection part; 121. Wire passing hole; 2. Switch element; 21. First limiting boss; 22. Pin; 23. Second connection structure; 3. Second protective shell; 31. Second accommodating cavity; 32. Second limiting boss; 33. Relief hole; 34. Third limiting boss; 35. Fourth connection structure; 4. Button; 41. Fourth limiting boss; 5. First sealing member; 6. Lead-out cable; 7. Third sealing member; 8. First flame retardant member; 9. Second mounting structure; 10. Second flame retardant member; 20. Washer. Detailed implementation manners

[0026] The embodiments of the present utility model will be described in detail below. The examples of the embodiments are shown in the drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the drawings are exemplary and are intended to explain the present utility model, and should not be construed as a limitation to the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0027] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "circumferential", "radial", etc. are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present utility model.

[0028] In addition, the terms "first" and "second" are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present utility model, the meanings of "a plurality" and "several" are two or more, unless otherwise specifically defined.

[0029] Embodiment:

[0030] An embodiment of the present utility model provides an explosion-proof electrical appliance, including an explosion-proof switch and an appliance body. The explosion-proof switch is disposed on the appliance body and electrically connected to the appliance body so that the explosion-proof switch can control the start and stop of the explosion-proof electrical appliance. In some specific examples, the explosion-proof electrical appliance can be an explosion-proof lamp, an explosion-proof instrument, an explosion-proof motor, etc.

[0031] Please refer to Figures 1 to 4 , the explosion-proof switch includes a first protective shell 1, a switch element 2, a second protective shell 3, and a button 4. The first protective shell 1 is provided with a first accommodation cavity 111; the switch element 2 is disposed on the first protective shell 1 and accommodated in the first accommodation cavity 111; the second protective shell 3 is disposed at one end of the first protective shell 1 and located outside the first protective shell 1. The second protective shell 3 is provided with a second accommodation cavity 31, and the switch element 2 is accommodated in the second accommodation cavity 31; the button 4 is slidably assembled on the second protective shell 3 and accommodated in the second accommodation cavity 31. The button 4 can slide to contact or separate from the switch element 2 to conduct or disconnect the switch element 2.

[0032] By disposing the switch element 2 in the first protective shell 1 and the second protective shell 3, and disposing the button 4 in the second protective shell 3, the switch element 2 and the button 4 can be protected by the protective shell, so that when the explosion-proof switch is subjected to an energy impact, the impacts on the switch element 2 and the button 4 are smaller, thereby enabling the explosion-proof switch to have an impact-resistant explosion-proof function. Thus, when installed on the appliance body of the explosion-proof electrical appliance, there is no need to perform explosion-proof treatment on the explosion-proof switch again. When operating the explosion-proof switch, only the button 4 needs to be pressed without performing other operations, which can simplify the cooperation and use mode between the explosion-proof switch and the explosion-proof electrical appliance.

[0033] It should be noted that when the button 4 slides to separate from the switch element 2, the end of the button 4 far from the switch element 2 is exposed on the end face of the second protective shell 3, which is convenient for pressing the button 4. When the button 4 slides to contact the switch element 2, the end of the button 4 far from the switch element 2 is flush with the end face of the second protective shell 3; among them, when the explosion-proof switch is subjected to an energy impact, the button 4 will move to be flush with the end face of the second protective shell 3 under the action of pressure. At this time, only one end face of the button 4 is exposed on the outside, which can further reduce the impact on the button 4.

[0034] Please refer to Figure 1 , Figure 2 , Figure 3 and Figure 4 . In some embodiments, both the first protective shell 1 and the second protective shell 3 are cylindrical, and the lengths of the first accommodation cavity 111 and the second accommodation cavity 31 both extend along the axial direction; the switch element 2 and the button 4 are both columnar, the length of the switch element 2 extends along the length direction of the first accommodation cavity 111, and the button 4 slides along the length direction of the second accommodation cavity 31. Both the first protective shell 1 and the second protective shell 3 are hardware parts. For example, the first protective shell 1 and the second protective shell 3 can be made of materials such as stainless steel and nickel-plated brass.

[0035] Please refer to Figure 2 and Figure 4 . The inner wall of the first accommodation cavity 111 is provided with a first connection structure 112, and the switch element 2 is provided with a second connection structure 23. The first connection structure 112 is connected to the second connection structure 23, thereby fixing the switch element 2 in the first protective shell 1. In a specific example, the first connection structure 112 and the second connection structure 23 are threadedly connected, which facilitates the mutual fixation between the switch element 2 and the first protective shell 1; among them, the first connection structure 112 can be a thread provided on the inner wall of the first accommodation cavity 111, and the second connection structure 23 can be a thread provided on the outer side of the switch element 2.

[0036] Please refer to Figure 2 and Figure 4 . A first limiting boss 21 is provided on the outer side of the switch element 2. The first limiting boss 21 abuts against the end of the first protective shell 1, thereby preventing the switch element 2 from moving further downward during the assembly process between it and the first protective shell 1; moreover, the first limiting boss 21 can perform a preliminary seal on the first accommodation cavity 111. Among them, the number of threads on the outer side of the switch element 2 is more than the number of threads on the inner wall of the first accommodation cavity 111, which can reduce the processing difficulty of the first protective shell 1; the first limiting boss 21 is annular, and the first limiting boss 21 is sleeved on the outer end of the switch element 2, and the outer diameter of the first limiting boss 21 is greater than the diameter of the first accommodation cavity 111, ensuring that the first limiting boss 21 can contact the end of the first protective shell 1. It can be understood that during the process of screwing and connecting the switch element 2 and the first protective shell 1, when the first limiting boss 21 abuts against the end of the first protective shell 1, the switch element 2 and the first protective shell 1 are screwed together in place.

[0037] It should be noted that in some other embodiments, the connection manner between the first connection structure 112 and the second connection structure 23 can be plug connection, snap connection, buckle connection, etc. For example, when the first connection structure 112 and the second connection structure 23 are in plug connection, the first connection structure 112 can be a plug post provided on the inner wall of the first accommodation cavity 111, and the second connection structure 23 can be a plug hole provided on the switch element 2. The plug post is inserted into the plug hole, and the plug post and the plug hole are in interference fit, so that the switch element 2 and the first protective shell 1 are fixed to each other.

[0038] Please refer to Figure 2 and Figure 4 , the first protective shell 1 is provided with a third connection structure 113, and the inner wall of the second accommodation cavity 31 is provided with a fourth connection structure 35. The third connection structure 113 is connected to the fourth connection structure 35, so as to fix the second protective shell 3 on the first protective shell 1. In a specific example, the third connection structure 113 and the fourth connection structure 35 are in threaded connection, which is convenient for the mutual fixation between the second protective shell 3 and the first protective shell 1; wherein, the third connection structure 113 can be a thread provided on the outer side of the first protective shell 1, and the fourth connection structure 35 can be a thread provided on the inner wall of the second accommodation cavity 31.

[0039] Please refer to Figure 2 and Figure 4 , the inner wall of the second accommodation cavity 31 is provided with a second limiting boss 32. The second limiting boss 32 abuts against one end of the switch element 2 away from the first protective shell 1, so as to prevent the second protective shell 3 from continuing to move downward during the assembly process with the first protective shell 1. Among them, the second limiting boss 32 and the thread on the second accommodation cavity 31 are distributed at intervals. The first limiting boss 21 is arranged between the first protective shell 1 and the second limiting boss 32, and the second limiting boss 32 abuts against the side of the first limiting boss 21 away from the first protective shell 1, so as to prevent the switch element 2 from moving upward; moreover, a conical surface is provided on the side of the second limiting boss close to the first protective shell 1, and a conical surface is provided on the side of the first limiting boss 21 away from the first protective shell 1, which is convenient for the first limiting boss 21 to contact with the second limiting boss 32. It can be understood that during the process of screwing and connecting the first protective shell 1 and the second protective shell 3, when the second limiting boss 32 abuts against the first limiting boss 21, the switch element 2 and the first protective shell 1 are screwed in place.

[0040] It should be understood that the second protective shell 3 can be understood as a lock nut corresponding to the switch element 2. By arranging the second limiting boss 32 to abut against the first limiting boss 21, the switch element 2 is locked and fixed on the first protective shell 1 through the second protective shell 3.

[0041] It should be noted that in some other embodiments, the third connection structure 113 and the fourth connection structure 35 can be plugged, snapped, buckled, etc. For example, when the third connection structure 113 and the fourth connection structure 35 are in a snap-fit, the third connection structure 113 can be a card slot provided on the outer side of the first protective shell 1, and the fourth connection structure 35 can be a snap portion provided on the inner wall of the second accommodation cavity 31. The snap portion is snapped into the card slot, thereby realizing the mutual fixation between the first protective shell 1 and the second protective shell 3.

[0042] Please refer to Figure 2 and Figure 4 , the second accommodation cavity 31 penetrates through the end face of the second protective shell 3 to form a relief hole 33, and the button 4 passes through the relief hole 33 to ensure that the switch element 2 can be exposed on the surface of the second protective shell 3 through the relief hole 33, facilitating the pressing of the button 4; the button 4 is provided with light transmission, and the state of the explosion-proof electrical appliance can be displayed by emitting lights of different colors outward. For example, when the button 4 emits red light outward, it means that the explosion-proof electrical appliance is in a fault state; when the button 4 emits green light outward, it means that the explosion-proof electrical appliance is in a normal working state; among them, the button 4 can be made of transparent acrylic material.

[0043] Please refer to Figure 2 and Figure 4 , a third limiting boss 34 is formed by the inner wall of the relief hole 33 protruding in the radial direction. A fourth limiting boss 41 is provided on the outer side of the button 4. The fourth limiting boss 41 is received in the second accommodation cavity 31, and the fourth limiting boss 41 is slidably assembled with the second protective shell 3; wherein, when the button 4 slides to contact or separate from the switch element 2, the fourth limiting boss 41 and the third limiting boss 34 are spaced apart or in contact, which can prevent the button 4 from sliding out of the second protective shell 3.

[0044] According to actual needs, the third limiting boss 34 is arranged around the relief hole 33. The fourth limiting boss 41 can be annular and sleeved on the outer side of the button 4. A washer 40 is also sleeved on the outer side of the button 4. The washer 40 is arranged between the third limiting boss 34 and the fourth limiting boss 41, so that the washer 40 can buffer the collision between the third limiting boss 34 and the fourth limiting boss 41.

[0045] Please refer to Figure 2 and Figure 4, the explosion-proof switch further includes a first seal 5, a lead wire 6, and a second seal 7. The first protective case 1 is further provided with a wire passing hole 121 which communicates with the first accommodation cavity 111; the first seal 5 is sleeved outside the switch element 2, and the first seal 5 is in sealing contact with the switch element 2 and the inner wall of the first accommodation cavity 111 respectively; one end of the lead wire 6 is connected to the switch element 2, and the other end passes through the wire passing hole 121 and extends outside the first protective case 1; the second seal 7 is disposed in the wire passing hole 121, and the second seal 7 is in sealing contact with the inner wall of the wire passing hole 121 and the lead wire 6 respectively.

[0046] By providing that the first seal 5 is in sealing contact with the switch element 2 and the inner wall of the first accommodation cavity 111 respectively, the assembly gap between the switch element 2 and the first protective case 1 is sealed; and by providing that the second seal 7 is in sealing contact with the inner wall of the wire passing hole 121 and the lead wire 6 respectively, the assembly gap between the lead wire 6 and the first protective case 1 is sealed, so as to improve the sealing performance of the explosion-proof switch and prevent rainwater and other flammable and explosive fluids in the external environment from easily entering the explosion-proof electrical appliance through the assembly gap of the explosion-proof switch, thus avoiding the occurrence of short circuit or explosion.

[0047] Please refer to Figure 2 and Figure 4 , the first seal 5 is disposed on one side of the first limiting boss 21 close to the lead wire 6, so that the first seal 5 can seal the assembly gap between the first limiting boss 21 and the first protective case 1 to ensure the sealing performance. Wherein, the first seal 5 can be a sealing ring.

[0048] In some embodiments, the second seal 7 is filled in the wire passing hole 121. Specifically, after the lead wire 6 passes through, sealant is filled into the wire passing hole 121 to form the second seal 7, which can make the lead wire 6 and the first protective case 1 have strong sealing performance. Wherein, the sealant can be polyurethane sealant, chloroprene rubber sealant, epoxy resin sealant, etc.; the diameter of the wire passing hole 121 ranges from 10 mm to 15 mm, for example, 10 mm, 11 mm, 12 mm, 13 mm, 14 mm, 15 mm, etc.; the length of the wire passing hole 121 ranges from 20 mm to 25 mm, for example, 20 mm, 21 mm, 22 mm, 23 mm, 24 mm, 25 mm, etc., to ensure that enough sealant can be accommodated in the wire passing hole 121.

[0049] In some other embodiments, an annular installation groove is provided on the inner wall of the wire passing hole 121, and the second seal 7 is disposed in the installation groove. Specifically, the second seal 7 is first installed in the installation groove, and then the lead-out cable 6 is passed through the second seal 7, making the assembly of the second seal 7 relatively simple. Among them, the second seal 7 can be a sealing ring, and multiple installation grooves and multiple sealing rings can be provided in the wire passing hole 121. The multiple installation grooves are spaced along the length direction of the wire passing hole 121, and the multiple sealing rings are respectively installed in the multiple installation grooves.

[0050] Please refer to Figure 3 and Figure 4 , the first protective shell 1 includes a main body portion 11 and a connecting portion 12. The main body portion 11 is provided with a first accommodating cavity 111; the connecting portion 12 is provided with a wire passing hole 121, and the diameter of the wire passing hole 121 is smaller than the diameter of the first accommodating cavity 111, so that a stepped structure is formed between the main body portion 11 and the connecting portion 12, which facilitates the connection between the connecting portion 12 and the device body of the explosion-proof device. A first installation structure 9 and a third seal 8 are provided on the outer side of the connecting portion 12. The first installation structure 9 is used to fix the connecting portion 12 on the device body of the explosion-proof device, thereby installing the explosion-proof switch on the device body of the explosion-proof device. The third seal 8 is sleeved on the outer side of the connecting portion 12, and the third seal 8 is used to contact the connecting portion 12 and the device body of the explosion-proof device respectively to ensure the sealing between the explosion-proof switch and the device body of the explosion-proof device.

[0051] Please refer to Figure 3 and Figure 4 , in some embodiments, a thread is provided on the outer side of the connecting portion 12, and the first installation structure 9 can be a lock nut. The lock nut is screwed on the outer side of the connecting portion 12, and the lock nut abuts against the device body and locks the device body on the stepped structure between the main body portion 11 and the connecting portion 12.

[0052] It should be noted that when the connecting portion 12 of the first protective shell 1 is locked and fixed on the device body of the explosion-proof electrical appliance, the explosion-proof switch as a whole protrudes from the outer surface of the device body, thus forming an externally locked explosion-proof switch.

[0053] Please refer to Figure 3 and Figure 4 , the explosion-proof switch further includes a first flame retardant member 10. The first flame retardant member 10 is sleeved on the outer side of the connecting portion 12, and the third seal 8 is disposed between the first flame retardant member 10 and the connecting portion 12. The first flame retardant member 10 is used to contact the device body of the explosion-proof device, thereby preventing the explosion-proof switch and the device body from igniting and burning each other; among them, the first flame retardant member 10 can be made of flame retardant silicone rubber.

[0054] In some other embodiments, the connection between the connecting portion 12 and the device body can also be achieved by snap connection, buckle connection, etc. For example, when the connection between the connecting portion 12 and the device body is by snap connection, the first installation structure 9 can be a snap portion provided on the outer side of the connecting portion 12, and a snap hole is provided on the device body. The snap portion is snapped into the snap hole, thereby installing the explosion-proof switch on the device body of the explosion-proof device.

[0055] Please refer to Figure 1 and Figure 2 , in some embodiments, a second installation structure 20 is provided on the outer side of the second protective shell 3. The second installation structure 20 is used to fix the second protective shell 3 on the device body of the explosion-proof device, thereby installing the explosion-proof switch on the device body of the explosion-proof device. A stepped structure is provided on the outer side of the second protective shell 3, and a thread is provided on the outer side of the second protective shell 3. The second installation structure 20 can be a lock nut. The lock nut is screwed onto the outer side of the second protective shell 3, and the lock nut abuts against the device body and locks and fixes the device body on the stepped structure of the second protective shell 3.

[0056] It should be noted that when the second protective shell 3 is locked and fixed on the device body of the explosion-proof electrical appliance, the explosion-proof switch is integrally received in the device body, thereby forming an internally locked explosion-proof switch.

[0057] Please refer to Figure 1 and Figure 2 , the explosion-proof switch further includes a second flame retardant member 30. The second flame retardant member 30 is sleeved on the outer side of the second protective shell 3. The second flame retardant member 30 is used to contact the device body of the explosion-proof device, thereby preventing the explosion-proof switch and the device body from igniting and burning each other; wherein, the second flame retardant member 30 can be made of flame retardant silicone rubber.

[0058] In some other embodiments, the connection between the second protective shell 3 and the device body can also be achieved by snap connection, buckle connection, etc. For example, when the connection between the second protective shell 3 and the device body is by snap connection, the second installation structure 20 can be a snap portion provided on the outer side of the second protective shell 3, and a snap hole is provided on the device body. The snap portion is snapped into the snap hole, thereby installing the explosion-proof switch on the device body of the explosion-proof device.

[0059] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An explosion-proof switch, characterized in that, include: A first protective shell is provided with a first accommodating cavity; a switch element, disposed in the first protective shell and accommodated in the first accommodating cavity; a second protective shell, disposed at one end of the first protective shell and located outside the first protective shell, the second protective shell being provided with a second accommodating cavity, the switch element being accommodated in the second accommodating cavity; and A button is slidably assembled on the second protective shell and accommodated in the second accommodating cavity. The button can slide to contact or separate from the switch element to turn on or off the switch element.

2. The explosion-proof switch according to claim 1, characterized in that, The inner wall of the first accommodating cavity is provided with a first connecting structure, the switch element is provided with a second connecting structure, and the first connecting structure is connected to the second connecting structure.

3. The explosion-proof switch according to claim 2, characterized in that, The first connecting structure is threadedly connected to the second connecting structure.

4. The explosion-proof switch according to claim 3, characterized in that, A first limiting boss is provided on the outer side of the switch element, and the first limiting boss abuts against the end of the first protective shell.

5. The explosion-proof switch according to claim 1, wherein, The first protective shell is provided with a third connecting structure, the inner wall of the second accommodating cavity is provided with a fourth connecting structure, and the third connecting structure is connected to the fourth connecting structure.

6. The explosion-proof switch according to claim 5, characterized in that, The third connecting structure is threadedly connected to the fourth connecting structure.

7. The explosion-proof switch according to claim 6, characterized in that, A second limiting boss is provided on the inner wall of the second accommodating cavity, and the second limiting boss abuts against an end of the switch element away from the first protective shell.

8. The explosion-proof switch according to claim 1, characterized in that, The second accommodating cavity passes through the end surface of the second protective shell to form a clearance hole, the button is inserted into the clearance hole, and the button is light-transmissive.

9. The explosion-proof switch according to claim 8, wherein, The inner wall of the clearance hole is raised in the radial direction to form a third limiting boss, and the outer side of the button is provided with a fourth limiting boss, and the fourth limiting boss is received in the second accommodating cavity; Wherein, when the button slides to contact or separate from the switch element, the fourth limiting boss is spaced apart from or abuts against the third limiting boss.

10. An explosion-proof electrical appliance, characterized in that, It comprises an explosion-proof switch and a device body as described in any one of claims 1 to 9, wherein the explosion-proof switch is arranged on the device body, and the explosion-proof switch is electrically connected to the device body.

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