Explosion-proof switch

Abstract

The utility model discloses an explosion-proof switch, and relates to the explosion-proof switch application field, the explosion-proof switch comprises a switch pedestal and a switch upper cover, the switch pedestal is internally provided with a first circuit board and a second circuit board, the switch pedestal is internally provided with a slide groove, the top of the slide groove is movably provided with a slide block, and the top of the slide block is provided with a through groove; a rotating shaft is rotationally connected into the switch upper cover, a disc is arranged at the top of the rotating shaft, and a metal rod is arranged at the top of the disc and penetrates into the through groove. Through the arrangement of the sliding groove, the sliding block, the metal rod and the disc, the metal rod can push the sliding block to move left and right in the sliding groove, so that the sliding block can impact the button to start the first circuit board and the second circuit board, and different from the mode that the cam extrudes the button from the side face, the sliding block impacts the button; the service life of the circuit board in the explosion-proof switch can be prolonged, and the problem of poor contact of the circuit board is reduced.

Description

Technical Field

[0001] The utility model relates to the application field of explosion-proof switches, in particular to an explosion-proof switch. Background Art

[0002] Switches are divided into ordinary and explosion-proof. Ordinary switches are used in general places. According to the characteristics of the environment, for example, places with water, waterproof switches should be used. Explosion-proof switches are used in high-risk places, such as chemical industries, and other flammable and explosive places. The electric sparks in the switch can be separated from the flammable and explosive substances in the outside world to achieve an explosion-proof level.

[0003] The explosion-proof switch is mainly composed of a base and an upper cover, which are fixed with bolts. A line group is installed inside the base, and a button for controlling the line group is provided on the side of the line group. A rotating shaft is also provided inside the base, and a cam is provided on the side of the rotating shaft. The cam is driven to rotate by rotating the rotating shaft, so that the cam squeezes the button of the line group when rotating, thereby achieving the purpose of starting and closing the line group. The start and close of the line group corresponds to the operation of the explosion-proof switch.

[0004] The explosion-proof switch starts and stops the circuit group by rotating the cam to squeeze the button. The cam frequently rotates and squeezes the button of the circuit group. Because the cam squeezes the button on the same side, the long-term use of the explosion-proof switch will cause the button of the circuit group inside the base to be damaged, which will lead to poor contact of the explosion-proof switch. Utility Model Content

[0005] Based on this, the purpose of the utility model is to provide an explosion-proof switch to solve the technical problems mentioned in the above background.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: an explosion-proof switch, comprising a switch base and a switch cover, wherein a first circuit board and a second circuit board are installed inside the switch base, and buttons are arranged on the sides of the first circuit board and the second circuit board, and a sliding groove is arranged inside the switch base, a slider is movably installed on the top of the sliding groove, and a through groove is opened on the top of the slider, a rotating shaft is rotatably connected inside the switch cover, and a disc is arranged on the top of the rotating shaft, and a metal rod is arranged on the top of the disc, and the metal rod penetrates into the interior of the through groove.

[0007] By adopting the above technical solution, by setting the sliding groove, the slider, the metal rod and the disc, when the user turns the knob to drive the shaft to rotate, the disc and the metal rod will be driven to rotate, and the metal rod will push the slider to move left and right in the sliding groove, so that the slider can hit the button to start the first circuit board and the second circuit board. Different from the cam squeezing the button from the side, the way the slider hits the button can extend the service life of the circuit board inside the explosion-proof switch and reduce the occurrence of poor contact problems of the circuit boards.

[0008] The utility model is further configured that a limiting block is arranged on the top of the rotating shaft, and a limiting groove is sleeved outside the limiting block, and a knob is arranged on the top of the limiting groove.

[0009] By adopting the above technical solution and providing the limit block and the limit slot, the rotation of the knob can drive the rotation shaft to rotate.

[0010] The utility model is further configured that an opening mark and a closing mark are arranged on the top of the switch upper cover, and the opening mark and the closing mark are arranged opposite to each other.

[0011] By adopting the above technical solution and setting the on mark and the off mark, the state of the explosion-proof switch can be identified when the knob is turned.

[0012] The utility model is further configured that a scale mark is provided on the top of the knob, and the scale mark can correspond to the on mark and the off mark when the knob is rotated.

[0013] By adopting the above technical solution, by setting a scale mark on the top of the knob, the knob has a marking function, so that the rotation of the knob can correspond to the on mark and the off mark.

[0014] The utility model is further configured such that when the first circuit board starts working, it corresponds to the open working state of the explosion-proof switch.

[0015] By adopting the above technical solution, the connection of the explosion-proof switch can be controlled by setting the first circuit board.

[0016] The utility model is further configured such that when the second circuit board starts working, it corresponds to the closed working state of the explosion-proof switch.

[0017] By adopting the above technical solution, the closing of the explosion-proof switch can be controlled by setting a second circuit board.

[0018] In summary, the utility model mainly has the following beneficial effects:

[0019] 1. The utility model provides a sliding groove, a slider, a metal rod and a disc. When the user turns the knob to drive the shaft to rotate, the disc and the metal rod will be driven to rotate. The metal rod will push the slider to move left and right in the sliding groove, so that the slider can hit the button to start the first circuit board and the second circuit board. Different from the cam squeezing the button from the side, the way the slider hits the button can extend the service life of the circuit board inside the explosion-proof switch and reduce the occurrence of poor contact problems of the circuit board.

[0020] 2. The utility model provides a first circuit board and a second circuit board, and uses the circuit board to replace the circuit group of the complex circuit. The circuit board has a compact structure and a small size, occupies less space inside the base, and is more convenient for the later maintenance of the explosion-proof switch. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural schematic diagram of the utility model;

[0022] Figure 2 This is a schematic diagram of the knob structure of the utility model;

[0023] Figure 3 This is a schematic diagram of the connection between the switch cover and the rotating shaft of the utility model;

[0024] Figure 4 This is a schematic diagram of the connection between the knob and the limit slot of the utility model;

[0025] Figure 5 This is a schematic diagram of the internal structure of the switch base of the utility model;

[0026] Figure 6 This is a schematic diagram of the connection between the rotating shaft and the switch cover of the utility model;

[0027] Figure 7 It is a partial structural schematic diagram of the utility model;

[0028] Figure 8 This is a schematic diagram of the connection between the rotating shaft, the disc and the metal rod of the utility model.

[0029] In the figure: 1. switch base; 2. switch cover; 3. first circuit board; 4. second circuit board; 5. sliding groove; 6. slider; 7. through groove; 8. rotating shaft; 9. disk; 10. metal rod; 11. button; 12. limit block; 13. knob; 14. limit groove; 15. scale mark; 16. open mark; 17. close mark. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. The embodiments described below with reference to the drawings are exemplary and are only used to explain the utility model, and cannot be understood as limiting the utility model.

[0031] The following describes an embodiment of the utility model based on its overall structure.

[0032] An explosion-proof switch, such as Figure 1-8As shown, the switch base 1 and the switch cover 2 are included. The switch base 1 is internally installed with a first circuit board 3 and a second circuit board 4, and the sides of the first circuit board 3 and the second circuit board 4 are both provided with buttons 11. The first circuit board 3 can be set to control the connection of the explosion-proof switch, and the second circuit board 4 can be used to control the closing of the explosion-proof switch. The switch base 1 is internally provided with a sliding groove 5, and a slider 6 is movably installed on the top of the sliding groove 5, and a through groove 7 is provided on the top of the slider 6. The switch cover 2 is internally rotatably connected with a rotating shaft 8, and a disc 9 is provided on the top of the rotating shaft 8, and a metal rod 10 is provided on the top of the disc 9. The metal rod 10 The switch base 1 and the switch cover 2 are both made of metal, which can improve the explosion-proof effect. By arranging the sliding groove 5, the slider 6, the metal rod 10 and the disk 9, when the user turns the knob 13 to drive the rotating shaft 8 to rotate, the disk 9 and the metal rod 10 will be driven to rotate. The metal rod 10 will push the slider 6 to move left and right in the sliding groove 5, so that the slider 6 can hit the button 11 to start the first circuit board 3 and the second circuit board 4. Different from the cam squeezing the button 11 from the side, the way in which the slider 6 hits the button 11 can extend the service life of the circuit board inside the explosion-proof switch and reduce the occurrence of poor contact problems of the circuit boards.

[0033] See also Figure 3 and Figure 4 A limit block 12 is provided on the top of the rotating shaft 8, and a limit groove 14 is provided on the outer sleeve of the limit block 12, and a knob 13 is provided on the top of the limit groove 14. By providing the limit block 12 and the limit groove 14, the rotating shaft 8 can be driven to rotate when the knob 13 is rotated.

[0034] See also Figure 2 An open mark 16 and a closed mark 17 are provided on the top of the switch upper cover 2, and the open mark 16 and the closed mark 17 are arranged opposite to each other. By setting the open mark 16 and the closed mark 17, the state of the explosion-proof switch can be identified when the knob 13 is turned.

[0035] See also Figure 2 A scale mark 15 is provided on the top of the knob 13, and the scale mark 15 can correspond to the open mark 16 and the close mark 17 when it is rotated. By providing the scale mark 15 on the top of the knob 13, the knob 13 has a marking function, so that the rotation of the knob 13 can correspond to the open mark 16 and the close mark 17.

[0036] See also Figure 5 When the first circuit board 3 starts working, it corresponds to the open working state of the explosion-proof switch. By setting the first circuit board 3, the connection of the explosion-proof switch can be controlled.

[0037] See also Figure 5When the second circuit board 4 starts working, it corresponds to the closed working state of the explosion-proof switch. By setting the second circuit board 4, the closing of the explosion-proof switch can be controlled.

[0038] The working principle of the utility model is as follows: when the explosion-proof switch is installed and used, when it is necessary to turn on the explosion-proof switch, the knob 13 is rotated one hundred and eighty degrees to rotate the scale mark 15 on the top of the knob 13 from the off mark 17 to the open mark 16. During the rotation of the knob 13, the knob 13 will drive the limit block 12 to rotate through the limit groove 14, thereby driving the rotating shaft 8 to rotate, and the rotating shaft 8 will drive the disc 9 to rotate, so that the metal rod 10 rotates with the disc 9. When the disc 9 rotates, it will push the through groove 7 to move, so that the through groove 7 hits the button 11 of the first circuit board 3, thereby using the first circuit board 3 to connect the circuit.

[0039] When the explosion-proof switch needs to be turned off, the knob 13 is rotated one hundred and eighty degrees again to rotate the scale mark 15 on the top of the knob 13 from the open mark 16 to the closed mark 17. According to the above steps, the slider 6 will hit the button 11 of the second circuit board 4, thereby using the second circuit board 4 to close the circuit.

[0040] Although an embodiment of the utility model has been shown and described, this specific embodiment is merely an explanation of the utility model and is not a limitation of the utility model. The specific features, structures, materials or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. After reading this specification, those skilled in the art may make modifications, substitutions and variations to the embodiments without creative contributions as needed without departing from the principles and purpose of the utility model. However, as long as they are within the scope of the claims of the utility model, they are protected by patent law.

Claims

1. An explosion-proof switch, comprising a switch base (1) and a switch cover (2), characterized in that: A first circuit board (3) and a second circuit board (4) are installed inside the switch base (1), and buttons (11) are arranged on the sides of the first circuit board (3) and the second circuit board (4), and a sliding groove (5) is arranged inside the switch base (1), a slider (6) is movably installed on the top of the sliding groove (5), and a through groove (7) is opened on the top of the slider (6), and a rotating shaft (8) is rotatably connected inside the switch upper cover (2), and a disc (9) is arranged on the top of the rotating shaft (8), and a metal rod (10) is arranged on the top of the disc (9), and the metal rod (10) passes through the inside of the through groove (7).

2. An explosion-proof switch according to claim 1, characterized in that: A limiting block (12) is arranged on the top of the rotating shaft (8), a limiting groove (14) is sleeved on the outside of the limiting block (12), and a knob (13) is arranged on the top of the limiting groove (14).

3. An explosion-proof switch according to claim 1, characterized in that: An open mark (16) and a closed mark (17) are arranged on the top of the switch upper cover (2), and the open mark (16) and the closed mark (17) are arranged opposite to each other.

4. An explosion-proof switch according to claim 2, characterized in that: A scale mark (15) is provided on the top of the knob (13), and the scale mark (15) can correspond to an open mark (16) and a close mark (17) when the knob (13) is rotated.

5. The explosion-proof switch according to claim 1, characterized in that: When the first circuit board (3) starts working, it corresponds to the open working state of the explosion-proof switch.

6. The explosion-proof switch according to claim 1, characterized in that: When the second circuit board (4) starts working, it corresponds to the closed working state of the explosion-proof switch.

7. The explosion-proof switch according to claim 1, characterized in that: The switch base (1) and the switch upper cover (2) are made of metal.

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