Magnetic type switch with explosion-proof performance

Abstract

The utility model discloses a magnetic switch with explosion-proof performance, and belongs to the technical field of petrochemical inspection and maintenance. The problem that working spark danger is prone to occurring in the working environment is solved, and therefore fire disasters and explosion accidents are avoided. Comprising a switch magnet, an upper shell, a touch switch mechanism and a lower shell, two grooves are formed in the top of the upper shell; the switch magnet is embedded in the upper shell through the groove; the touch switch mechanism is fixed in the upper shell; the lower shell is fixed at the bottom of the upper shell; the light touch switch mechanism comprises a light touch switch assembly, a connecting rod assembly and a first magnetic attraction assembly; the touch switch assembly comprises a switch assembly, a spring and a second magnetic attraction assembly; the switch assembly and the second magnetic attraction assembly are arranged at the two ends of the spring respectively. The second magnetic attraction assembly and the first magnetic attraction assembly are in lever connection through the connecting rod assembly. The positions of the switch assembly and the first magnetic attraction assembly are in one-to-one correspondence with the positions of the two grooves; the switching device of the gas detection equipment is suitable for places where gas and dust are easy to explode.

Description

Technical Field

[0001] The utility model relates to the technical field of petrochemical inspection and maintenance. Background Art

[0002] When carrying out inspection and maintenance work in the petrochemical industry, in an environment where gas leakage is likely to occur, when people manually turn on and off the corresponding gas inspection and maintenance equipment, it is easy to generate working electrical sparks, which may cause fire and explosion accidents in the workplace. Utility Model Content

[0003] The utility model provides a magnetic switch with explosion-proof performance, which solves the problem that spark danger is easy to occur in the working environment, thereby avoiding fire and explosion accidents.

[0004] To achieve the above purpose, the utility model provides the following solutions:

[0005] The utility model provides a magnetic switch with explosion-proof performance, the switch comprising a switch magnet, an upper shell, a touch switch mechanism and a lower shell;

[0006] The top of the upper shell is provided with two grooves;

[0007] The switch magnet is embedded in the upper housing through the groove;

[0008] The touch switch mechanism is fixed inside the upper housing;

[0009] The lower shell is fixed to the bottom of the upper shell;

[0010] The touch switch mechanism comprises a touch switch assembly, a connecting rod assembly and a first magnetic attraction assembly;

[0011] The touch switch assembly includes a switch assembly, a spring and a second magnetic attraction assembly;

[0012] The switch component and the second magnetic attraction component are respectively arranged at two ends of the spring;

[0013] The second magnetic attraction component is lever-connected to the first magnetic attraction component via the connecting rod component;

[0014] The positions of the switch component and the first magnetic attraction component correspond one-to-one to the positions of the two grooves respectively;

[0015] The switch component is used to be connected to the second magnetic attraction component through magnetism, and is also used to be disconnected from the second magnetic attraction component through the spring;

[0016] The switch magnet is used to magnetically absorb the second magnetic component so that the switch component is connected to the second magnetic component; it is also used to absorb the first magnetic component so that the second magnetic component is disconnected from the switch component under the action of the connecting rod component and the spring.

[0017] Furthermore, in a preferred embodiment, the switch assembly comprises a wiring board, a touch switch lower housing, a spring sheet, a touch switch upper housing and a button;

[0018] The wiring board is welded to the top of the lower housing of the touch switch;

[0019] The spring sheet is arranged inside the upper housing of the touch switch;

[0020] The touch switch upper housing is fixed to the bottom of the touch switch lower housing;

[0021] The button is fixed on the bottom of the upper shell of the touch switch.

[0022] Furthermore, in a preferred embodiment, the second magnetic attraction assembly comprises a contact, a second permanent magnet, a second magnet housing and a second touch switch connecting rod;

[0023] The contact is fixed on the top of the second permanent magnet and corresponds to the position of the button;

[0024] The second permanent magnet is fixed in the second magnet housing;

[0025] The second touch switch connecting rod is fixed to the bottom of the second magnet housing.

[0026] Furthermore, in a preferred embodiment, the first magnetic attraction component comprises a first permanent magnet, a first magnet housing and a first touch switch connecting rod;

[0027] The first permanent magnet is fixed in the first magnet housing;

[0028] The first touch switch connecting rod is fixed to the bottom of the first magnet housing.

[0029] Furthermore, there is a preferred embodiment in which the connecting rod assembly comprises a lever support and a connecting rod.

[0030] The first tact switch connecting rod and the second tact switch connecting rod are respectively fixed at two ends of the connecting rod;

[0031] The lever strut is fixed to the middle portion of the connecting rod.

[0032] Furthermore, in a preferred embodiment, the connecting rod assembly further comprises a plurality of pins;

[0033] The lever strut is fixed to the middle portion of the connecting rod by the pin.

[0034] Furthermore, in a preferred embodiment, a circular protrusion is provided on the switch magnet.

[0035] Furthermore, in a preferred embodiment, the touch switch mechanism is fixed inside the upper housing by M3×6 screws.

[0036] Furthermore, in a preferred embodiment, the housing is fixed to the bottom of the upper housing 2 by M4×8 screws.

[0037] Furthermore, in a preferred embodiment, the switch further comprises an explosion-proof connector;

[0038] The explosion-proof joint is connected to the side surface of the upper shell through metal threads.

[0039] The beneficial effects of the utility model are:

[0040] 1. The utility model provides a magnetic switch with explosion-proof performance. Two grooves are arranged on the upper shell, which are used as the ON option and the OFF option of the switch respectively. A touch switch assembly composed of a switch assembly and a second magnetic assembly is arranged below the groove of the ON option, and a first magnetic assembly is arranged below the groove of the OFF option. The first magnetic assembly is lever-connected with the second magnetic assembly through a connecting rod assembly. The first magnetic assembly and the second magnetic assembly are both implemented by permanent magnets, so that when the switch magnet is placed in the groove of the ON option, the switch assembly and the second magnetic assembly are closed under the action of magnetism. When the switch magnet is placed in the groove of the OFF option, the switch magnet absorbs the first magnetic assembly, so that the first magnetic assembly drives the second magnetic assembly to disconnect from the switch assembly under the lever action of the connecting rod assembly. At the same time, the switch assembly and the second magnetic assembly are respectively arranged at both ends of the spring, so that under the action of the spring, the switch assembly and the second magnetic assembly will not be immediately closed again due to magnetism after being disconnected. Moreover, when the switch magnet is placed in the groove of the OFF option, due to the magnetic adsorption of the first magnetic attraction component, the switch magnet can be firmly embedded in the groove, so that the switch magnet will not be lost when not in use, and it is also convenient for the operator to perform opening and closing actions to realize the electrical switching of related equipment, so that no electric sparks will be generated during the switch operation, thereby solving the problem of working spark hazards in the working environment, thereby avoiding fire and explosion accidents.

[0041] 2. The utility model provides a magnetic switch with explosion-proof performance, which uses a connecting rod assembly to connect the first magnetic assembly with the light touch switch assembly lever, so that the mechanical feedback of controlling the magnet operation can be realized by using the lever principle, achieving a good operating experience.

[0042] The utility model is suitable for a switch device of gas detection equipment in places where gas and dust are prone to explosion. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] Figure 1 It is a structural schematic diagram of a magnetic switch with explosion-proof performance described in embodiments 1 and 7;

[0044] Figure 2 It is a schematic diagram of the assembly of a magnetic switch with explosion-proof performance described in embodiments one, eight, nine and ten;

[0045] Figure 3 is a structural schematic diagram of the touch switch mechanism described in Embodiment 1;

[0046] Figure 4 is an exploded schematic diagram of the touch switch mechanism described in embodiments 2 to 6;

[0047] Among them, 1-switch magnet, 2-upper shell, 3-explosion-proof connector, 4-lower shell, 5-touch switch mechanism, 51-touch switch assembly, 511-switch assembly, 5111-wiring board, 5112-touch switch lower shell, 5113-spring sheet, 5114-touch switch upper shell, 5115-button, 512-second magnetic suction assembly, 5121-contact, 5122-second permanent magnet, 5123-second magnet shell, 5124-second touch switch connecting rod, 513-spring, 52-connecting rod assembly, 521-lever support, 522-connecting rod, 523-pin, 53-first magnetic suction assembly, 531-first permanent magnet, 532-first magnet shell, 533-first touch switch connecting rod, 6-M3×6 screws, 7-M4×8 screws. DETAILED DESCRIPTION

[0048] The specific implementation methods of the utility model are further described in detail below in conjunction with the accompanying drawings and examples. The following examples will help those skilled in the art to further understand the utility model, but do not limit the utility model in any form. It should be pointed out that for those of ordinary skill in the art, several changes and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model.

[0049] Implementation method 1. See Figures 1 to 3 This embodiment is described. This embodiment provides a magnetic switch with explosion-proof performance. The switch includes a switch magnet 1, an upper shell 2, a touch switch mechanism 5 and a lower shell 4;

[0050] The top of the upper shell 2 is provided with two grooves;

[0051] The switch magnet 1 is embedded in the upper housing 2 through the groove;

[0052] The touch switch mechanism 5 is fixed inside the upper housing 2;

[0053] The lower shell 4 is fixed to the bottom of the upper shell 2;

[0054] The touch switch mechanism 5 includes a touch switch assembly 51, a connecting rod assembly 52 and a first magnetic attraction assembly 53;

[0055] The touch switch assembly 51 includes a switch assembly 511, a spring 513 and a second magnetic attraction assembly 512;

[0056] The switch component 511 and the second magnetic attraction component 512 are respectively disposed at two ends of the spring 513;

[0057] The second magnetic attraction component 512 and the first magnetic attraction component 53 are lever-connected via the connecting rod component 52;

[0058] The positions of the switch component 511 and the first magnetic attraction component 53 correspond to the positions of the two grooves respectively;

[0059] The switch component 511 is used to be connected to the second magnetic component 512 through magnetism, and is also used to be disconnected from the second magnetic component 512 through the spring 513;

[0060] The switch magnet 1 is used to magnetically absorb the second magnetic component 512 so that the switch component 511 is connected to the second magnetic component 512; it is also used to absorb the first magnetic component 53 so that the second magnetic component 512 is disconnected from the switch component 511 under the action of the connecting rod component 52 and the spring 513.

[0061] In practical application, if Figure 1 and Figure 2 As shown, the top of the upper housing 2 is provided with two grooves, which are used as the ON option and the OFF option of the switch respectively; the switch magnet 1 can be embedded in the upper housing 2 through the grooves. The touch switch mechanism 5 is fixed inside the upper housing 2, wherein, as shown in FIG. Figure 3As shown, the touch switch mechanism 5 includes a touch switch component 51, a first magnetic component 53 and a connecting rod component 52, and the touch switch component 51 includes a switch component 511, a spring 513 and a second magnetic component 512; the switch component 511 is used to be magnetically connected to the second magnetic component 512, and is also used to be disconnected from the second magnetic component 512 through the spring 513, that is, the switch component 511 and the second magnetic component 512 are respectively arranged at both ends of the spring 513, so that the switch component 511 can be connected to the second magnetic component 512 through magnetism, and under the action of the spring 513, the switch component 511 is disconnected from the second magnetic component 512. At the same time, the second magnetic attraction component 512 is connected to the first magnetic attraction component 53 through the connecting rod component 52, and the positions of the switch component 511 and the first magnetic attraction component 53 correspond to the positions of the two grooves, so that when the switch magnet 1 is placed in the groove corresponding to the switch component 5115, the switch magnet 1 magnetically absorbs the second magnetic attraction component 512, thereby closing the second magnetic attraction component 512 and the switch component 511 to realize the opening function of the switch; when the switch magnet 1 is placed in the groove corresponding to the first magnetic attraction component 53, the switch magnet 1 magnetically absorbs the second magnetic attraction component 512. The first magnetic component 53, under the action of the lever principle of the connecting rod component 52, the second magnetic component 512 is disconnected from the switch component 511, and under the action of the spring 513, the second magnetic component 512 and the switch component 511 will not be closed, thereby realizing the closing function in the switch; and when the switch magnet 1 is placed in the groove corresponding to the first magnetic component 52, due to the magnetic adsorption of the first magnetic component 52, the switch magnet 1 can be firmly embedded in the groove, so that the switch magnet 1 will not be lost when not in use, and it is also convenient for the operator to perform the opening and closing actions.

[0062] The present embodiment provides a magnetic switch with explosion-proof performance, which is provided with two grooves on the upper shell, which are used as the ON option and the OFF option of the switch respectively, wherein a touch switch component composed of a switch component and a second magnetic component is provided below the groove of the ON option, and a first magnetic component is provided below the groove of the OFF option, and the first magnetic component is lever-connected with the second magnetic component through a connecting rod component; the first magnetic component and the second magnetic component are both implemented by permanent magnets, so that when the switch magnet is placed in the groove of the ON option, the switch component and the second magnetic component are closed under the action of magnetism; when the switch magnet is placed in the groove of the OFF option, the switch magnet absorbs the first magnetic component, so that the first magnetic component drives the second magnetic component to disconnect from the switch component under the lever action of the connecting rod component, and at the same time, the switch component and the second magnetic component are respectively arranged at both ends of the spring, so that under the action of the spring, the switch component and the second magnetic component will not be immediately closed again due to magnetism after being disconnected. Moreover, when the switch magnet is placed in the groove of the OFF option, due to the magnetic adsorption of the first magnetic attraction component, the switch magnet 1 can be firmly embedded in the groove, so that the switch magnet 1 will not be lost when not in use, and it is also convenient for the operator to perform opening and closing actions to realize the electrical switching of related equipment, so that no electric sparks will be generated during the switch operation, thereby solving the problem of working spark hazards in the working environment, thereby avoiding fire and explosion accidents.

[0063] Implementation method 2. See Figure 4 This embodiment is described as an example of a switch assembly in a magnetic switch with explosion-proof performance described in Embodiment 1. The switch assembly 511 includes a wiring board 5111, a touch switch lower shell 5112, a spring sheet 5113, a touch switch upper shell 5114 and a button 5115;

[0064] The wiring board 5111 is welded to the top of the touch switch lower housing 5112;

[0065] The spring sheet 5113 is arranged inside the upper housing 5114 of the touch switch;

[0066] The touch switch upper housing 5114 is fixed to the bottom of the touch switch lower housing 5112;

[0067] The button 5115 is fixed to the bottom of the touch switch upper shell 5114.

[0068] In practical application, if Figure 4As shown, the terminal board 5111 is welded on the top of the lower shell 5112 of the touch switch for connecting with related equipment, and the spring sheet 5113 is arranged inside the upper shell 5114 of the touch switch. The upper shell 5114 of the touch switch is fixed to the bottom of the lower shell 5112 of the touch switch to form a switch assembly with contact buffering. At the same time, the button 5115 is fixed to the bottom of the upper shell 5114 of the touch switch for connecting with the second magnetic suction assembly 512.

[0069] Implementation method 3. See Figure 4 This embodiment is described as an example of the second magnetic attraction component in the magnetic attraction switch with explosion-proof performance described in the second embodiment. The second magnetic attraction component 512 includes a contact 5121, a second permanent magnet 5122, a second magnet housing 5123, and a second touch switch connecting rod 5124;

[0070] The contact 5121 is fixed on the top of the second permanent magnet 5122 and corresponds to the position of the button 5115;

[0071] The second permanent magnet 5122 is fixed in the second magnet housing 5123;

[0072] The second touch switch connecting rod 5124 is fixed to the bottom of the second magnet housing 5123 .

[0073] In practical application, if Figure 4 As shown, the contact 5121 is fixed on the top of the second permanent magnet 5122 and corresponds to the position of the button 5115, so that the contact 5121 is in contact with the button 5115; the second permanent magnet 5122 is fixed in the second magnet shell 5123, and the second touch switch connecting rod 5124 is fixed to the bottom of the second magnet shell 5123, so that the second touch switch connecting rod 5124 is connected to the first magnetic attraction assembly 53 through the connecting rod assembly 52.

[0074] Implementation method 4. See Figure 4 This embodiment is described as follows: This embodiment is an example of the first magnetic attraction component in a magnetic attraction switch with explosion-proof performance described in Embodiment 3, wherein the first magnetic attraction component 53 includes a first permanent magnet 531, a first magnet housing 532 and a first touch switch connecting rod 533;

[0075] The first permanent magnet 531 is fixed in the first magnet housing 532;

[0076] The first touch switch connecting rod 533 is fixed to the bottom of the first magnet housing 532 .

[0077] In practical application, if Figure 4As shown, the first permanent magnet 531 is fixed inside the first magnet housing 532 , and a first touch switch connecting rod 533 is fixed to the bottom of the first magnet housing 532 , so that the first touch switch connecting rod 533 is connected to the second touch switch connecting rod 5124 through the connecting rod assembly 52 .

[0078] Implementation method 5. See Figure 4 This embodiment is described as an example of a connecting rod assembly in a magnetic switch with explosion-proof performance described in Embodiment 4. The connecting rod assembly 52 includes a lever support 521 and a connecting rod 522.

[0079] The first tact switch connecting rod 533 and the second tact switch connecting rod 5124 are respectively fixed at two ends of the connecting rod 522;

[0080] The lever support 521 is fixed at the middle portion of the connecting rod 522 .

[0081] In practical application, if Figure 4 As shown, the first touch switch connecting rod 533 and the second touch switch connecting rod 5124 are respectively fixed at both ends of the connecting rod 522, and the lever support 521 is fixed in the middle of the connecting rod 521, so that the first touch switch connecting rod 533 and the second touch switch connecting rod 5124 are lever-connected.

[0082] Implementation method 6. See Figure 4 This embodiment is described. This embodiment is based on the magnetic switch with explosion-proof performance described in Embodiment 5, and a plurality of pins 523 are added;

[0083] The connecting rod assembly also includes a plurality of pins 523;

[0084] The lever support 521 is fixed to the middle portion of the connecting rod 522 via the pin 523 .

[0085] In practical application, if Figure 4 As shown, the lever support 521 is fixed to the middle of the connecting rod 522 through a pin 523; the first touch switch connecting rod 521 and the second touch switch connecting rod 5124 are respectively fixed to the two ends of the connecting rod 522 through the pin 523 to achieve lever connection.

[0086] This embodiment provides a magnetic switch with explosion-proof performance, which uses a connecting rod assembly to connect the first magnetic assembly with the touch switch assembly lever, so that the lever principle can be used to achieve mechanical feedback to control the operation of the magnet, achieving a good operating experience.

[0087] Implementation method 7. See Figure 1This embodiment is described as follows. This embodiment is an example of a switch magnet 1 in a magnetic switch with explosion-proof performance described in Embodiment 1. A circular protrusion is provided on the switch magnet 1.

[0088] In practical application, if Figure 1 As shown, a circular protrusion is provided on the switch magnet 1 to facilitate the staff to take it.

[0089] Implementation Method 8. See Figure 2 This embodiment is described. This embodiment is based on the magnetic switch with explosion-proof performance described in the first embodiment and adds M3×6 screws;

[0090] The touch switch mechanism 5 is fixed inside the upper housing 2 by M3×6 screws.

[0091] Implementation method 9. See Figure 2 This embodiment is described. This embodiment is based on the magnetic switch with explosion-proof performance described in the first embodiment and adds M4×8 screws;

[0092] The lower housing 4 is fixed to the bottom of the upper housing 2 by M4×8 screws.

[0093] Implementation method 10. See Figure 2 This embodiment is described. This embodiment is based on the magnetic switch with explosion-proof performance described in the first embodiment, and an explosion-proof connector 3 is added;

[0094] The explosion-proof joint 3 is connected to the side surface of the upper shell 2 through metal threads.

[0095] In practical application, if Figure 2 As shown, metal threads are provided on the sides of the explosion-proof joint 3 and the upper shell 2, and the explosion-proof joint 3 is connected to the side of the upper shell 2 through the metal threads for connection with related equipment.

[0096] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present utility model, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0097] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0098] The above description is only an embodiment of the present invention and is not limited to the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the scope of the claims of the present invention.

Claims

1. A magnetic switch with explosion-proof performance, characterized in that: The switch comprises a switch magnet (1), an upper housing (2), a touch switch mechanism (5) and a lower housing (4); The top of the upper shell (2) is provided with two grooves; The switch magnet (1) is embedded in the upper housing (2) through the groove; The touch switch mechanism (5) is fixed inside the upper housing (2); The lower shell (4) is fixed to the bottom of the upper shell (2); The touch switch mechanism (5) comprises a touch switch assembly (51), a connecting rod assembly (52) and a first magnetic attraction assembly (53); The touch switch assembly (51) comprises a switch assembly (511), a spring (513) and a second magnetic attraction assembly (512); The switch component (511) and the second magnetic attraction component (512) are respectively arranged at two ends of the spring (513); The second magnetic attraction component (512) and the first magnetic attraction component (53) are lever-connected via the connecting rod component (52); The positions of the switch component (511) and the first magnetic attraction component (53) correspond one-to-one to the positions of the two grooves respectively; The switch component (511) is used to be connected to the second magnetic attraction component (512) through magnetism, and is also used to be disconnected from the second magnetic attraction component (512) through the spring (513); The switch magnet (1) is used to magnetically absorb the second magnetic component (512) so that the switch component (511) is connected to the second magnetic component (512); and is also used to absorb the first magnetic component (53) so that the second magnetic component (512) is disconnected from the switch component (511) under the action of the connecting rod component (52) and the spring (513).

2. The explosion-proof magnetic switch according to claim 1, characterized in that: The switch assembly (511) comprises a wiring board (5111), a touch switch lower housing (5112), a spring sheet (5113), a touch switch upper housing (5114) and a button (5115); The wiring board (5111) is welded to the top of the lower housing (5112) of the touch switch; The spring sheet (5113) is arranged inside the upper housing (5114) of the touch switch; The touch switch upper housing (5114) is fixed to the bottom of the touch switch lower housing (5112); The button (5115) is fixed to the bottom of the touch switch upper shell (5114).

3. The explosion-proof magnetic switch according to claim 2, characterized in that: The second magnetic attraction component (512) comprises a contact (5121), a second permanent magnet (5122), a second magnet housing (5123) and a second touch switch connecting rod (5124); The contact (5121) is fixed on the top of the second permanent magnet (5122) and corresponds to the position of the button (5115); The second permanent magnet (5122) is fixed in the second magnet housing (5123); The second touch switch connecting rod (5124) is fixed to the bottom of the second magnet housing (5123).

4. The explosion-proof magnetic switch according to claim 3, characterized in that: The first magnetic attraction component (53) comprises a first permanent magnet (531), a first magnet housing (532) and a first touch switch connecting rod (533); The first permanent magnet (531) is fixed in the first magnet housing (532); The first touch switch connecting rod (533) is fixed to the bottom of the first magnet housing (532).

5. The explosion-proof magnetic switch according to claim 4, characterized in that: The connecting rod assembly (52) includes a lever support (521) and a connecting rod (522); The first tact switch connecting rod (533) and the second tact switch connecting rod (5124) are respectively fixed at two ends of the connecting rod (522); The lever support (521) is fixed at the middle portion of the connecting rod (522).

6. The explosion-proof magnetic switch according to claim 5, characterized in that: The connecting rod assembly also includes a plurality of pins (523); The lever support (521) is fixed to the middle part of the connecting rod (522) via the pin (523).

7. The explosion-proof magnetic switch according to claim 1, characterized in that: The switch magnet (1) is provided with a circular protrusion.

8. The explosion-proof magnetic switch according to claim 1, characterized in that: The touch switch mechanism (5) is fixed inside the upper housing (2) by means of M3×6 screws (6).

9. The explosion-proof magnetic switch according to claim 1, characterized in that: The lower housing (4) is fixed to the bottom of the upper housing (2) by means of M4×8 screws (7).

10. The explosion-proof magnetic switch according to claim 1, characterized in that: The switch also includes an explosion-proof connector (3); The explosion-proof joint (3) is connected to the side surface of the upper shell (2) via metal threads.

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