High-temperature microswitch

Abstract

The utility model provides a high-temperature microswitch. The high-temperature microswitch comprises a shell assembly and a ceramic base assembly installed in the shell assembly. The ceramic base assembly is provided with a conductive piece assembly A, a conductive piece assembly B and a conductive piece assembly C, the conductive piece assembly A is riveted with a contact piece assembly A, the conductive piece assembly B is riveted with a contact piece assembly B, and the conductive piece assembly C is riveted with a flat reed assembly. In order to realize the use of the switch at ultra-high temperature, except that the ceramic base and the keys adopt ceramics as insulators, other parts of the switch are all made of metal, and the ceramic base and the metal parts are fixed through high-temperature glue; in order to realize the characteristics of rapid switching, sensitive action and high parameter precision of the microswitch, an elastic element of the microswitch is made of a high-temperature-resistant elastic material, and in order to ensure the consistency of the action of the microswitch, an adjusting screw is adopted inside for adjustment, so that the error of inconsistent action strokes of the microswitch caused by processing and assembling errors of switch parts is eliminated; and the reliability of the switch conversion action is improved.

Description

Technical Field

[0001] The utility model relates to a high-temperature micro switch, belonging to the technical field of mechanical switches, and specifically relates to a micro switch with a high temperature of 538 °C. Background Art

[0002] A micro switch, also known as a sensitive switch, is an important component in an automatic control system. The instantaneous switching speed of the switch between closing and opening is extremely fast, and it is often used to switch the on and off of a circuit in an automatic control circuit.

[0003] The operating temperature of existing micro switches is about 200 °C. In practical applications, the switch needs to be used in a harsh environment with extremely high temperatures. Summary of the Utility Model

[0004] To solve the above technical problems, the utility model provides a high-temperature micro switch.

[0005] The utility model is achieved through the following technical solutions.

[0006] A high-temperature micro switch provided by the utility model includes a housing assembly and a ceramic base assembly installed inside the housing assembly; a conductive component assembly A, a conductive component assembly B, and a conductive component assembly C are provided on the ceramic base assembly. A contact piece assembly A is riveted on the conductive component assembly A, a contact piece assembly B is riveted on the conductive component assembly B, and a flat spring piece assembly is riveted on the conductive component assembly C.

[0007] The ceramic base assembly includes a ceramic base. Multiple part fixing holes and mounting holes are provided on the ceramic base. An adjusting screw and an M2 nut are provided inside a part fixing block; the housing assembly includes a housing. Multiple raised holes and mounting holes are provided on the housing; a bushing is provided inside the raised hole, and a button is movably connected inside the bushing.

[0008] The conductive component assembly A, the conductive component assembly B, and the conductive component assembly C are respectively connected to the ceramic base assembly through elastic washers and M3.5 nuts.

[0009] The contact piece assembly A includes a contact piece A and a fixed contact. The fixed contact is fixed at one end of the contact piece A by press riveting.

[0010] The conductive component assembly A includes a conductive component A. The other end of the contact piece A is connected to the cylindrical end of the conductive component A by press riveting.

[0011] The contact piece assembly B includes a contact piece B and a fixed contact. The fixed contact is fixed at one end of the contact piece B by press riveting.

[0012] The conductive component assembly B includes a conductive component B. The other end of the contact piece B is connected to the cylindrical end of the conductive component B by press riveting.

[0013] The flat spring piece assembly includes a flat spring piece and a moving contact, and the moving contact is fixed to one end of the flat spring piece by press riveting.

[0014] The conductive part assembly C includes a conductive part C, and the other end of the flat spring piece is connected to the cylindrical end of the conductive part C; a support frame is provided between the flat spring piece and the conductive part C, and a washer B is provided on the upper end surface of the flat spring piece.

[0015] The ceramic base assembly and the housing assembly are welded and connected through a mounting sleeve and a washer A. The mounting sleeve passes through the mounting holes of the ceramic base and the housing, and the washer A passes through the mounting sleeve and contacts the housing.

[0016] The beneficial effects of the present utility model are as follows: To enable the switch to be used at ultra-high temperatures, except for the ceramic base and the button which are made of ceramic as insulators, the rest of the parts are all metal. The fixation between the ceramic base and the metal parts is achieved through high-temperature glue; To achieve the characteristics of fast switching, sensitive action, and high parameter accuracy of the micro switch, the elastic element of the switch is made of a high-temperature-resistant elastic material, and to ensure the consistency of the switch action, an adjusting screw is used for adjustment inside to eliminate the error of inconsistent switch action stroke caused by machining and assembly errors of the switch parts, and improve the reliability of the switch conversion action. Description of the Drawings

[0017] Figure 1 is the structural schematic diagram of the present utility model;

[0018] Figure 2 is Figure 1 the top view of

[0019] Figure 3 is Figure 1 the structural schematic diagram of the contact piece assembly A in

[0020] Figure 4 is Figure 1 the structural schematic diagram of the contact piece assembly B in

[0021] Figure 5 is Figure 1 the structural schematic diagram of the flat spring piece assembly in

[0022] Figure 6 is Figure 1 the structural schematic diagram of the conductive part assembly C in

[0023] Figure 7 is Figure 1 the structural schematic diagram of the ceramic base assembly in

[0024] Figure 8 is Figure 1 the structural schematic diagram of the housing assembly in

[0025] In the figure: 1 - Contact piece assembly A, 2 - Conductive piece assembly A, 3 - Contact piece assembly B, 4 - Conductive piece assembly B, 5 - Flat spring piece assembly, 6 - Conductive piece assembly C, 7 - Ceramic base assembly, 8 - Housing assembly, 9 - Elastic washer, 10 - M3.5 nut, 11 - Mounting sleeve, 12 - Washer A, 13 - Contact piece A, 14 - Fixed contact, 15 - Conductive piece A, 16 - Conductive piece B, 17 - Conductive piece C, 18 - Contact piece B, 19 - Flat spring piece, 20 - Moving contact, 21 - Support bracket, 22 - Washer B, 23 - Ceramic base, 24 - Adjusting screw, 25 - M2 nut, 26 - Housing, 27 - Bush, 28 - Button, 29 - High-temperature adhesive. Detailed implementation mode

[0026] The technical solution of the present utility model will be further described below, but the scope of protection claimed is not limited thereto.

[0027] As Figures 1 to 8 shown, the contact piece assembly A 1 is installed on the conductive piece assembly A 2 by riveting, the contact piece assembly B 3 is installed on the conductive piece assembly B 4 by riveting, the flat spring piece assembly 5 is installed on the conductive piece assembly C 6 by spin riveting, and the conductive piece assembly A 2, the conductive piece assembly B 4 and the conductive piece assembly C 6 are installed on the ceramic base assembly 7 by the nut 10 and the elastic washer 9. The ceramic base assembly 7 and the housing assembly 8 are welded together by the mounting sleeve 11 and the washer A 12.

[0028] The contact piece assembly A 1 includes a contact piece A 13 and a fixed contact 14. The fixed contact 14 passes through one end of the contact piece A 13, and the fixed contact 14 is fixed on the contact piece A 13 by press riveting.

[0029] The contact piece assembly B 3 includes a contact piece B 18 and a fixed contact 14. The fixed contact 14 passes through one end of the contact piece B 18, and the fixed contact is fixed on the contact piece B 18 by press riveting.

[0030] The flat spring piece assembly 5 (actuating mechanism) includes a flat spring piece 19 and a moving contact 20. The flat spring piece 19 is processed from a high-temperature resistant elastic material, and its thickness is 0.2 mm. The moving contact 20 passes through one end of the flat spring piece 19, and the moving contact 20 is fixed on the flat spring piece 19 by press riveting.

[0031] The conductive piece assembly A 2 includes a conductive piece A 15. The other end of the contact piece A 13 passes through the cylindrical end of the conductive piece 15, and they are firmly contacted by press riveting.

[0032] The conductive piece assembly B 4 includes a conductive piece B 16. The other end of the contact piece B 18 passes through the cylindrical end of the conductive piece 16, and they are firmly contacted by press riveting.

[0033] The conductive component assembly C6 includes a conductive component C17, a support bracket 21, and a washer B22. The support bracket 21 passes through the cylindrical end of the conductive component C17, and then the other end of the flat spring 19 passes through the conductive component C17 to contact the support bracket 21. Then, the washer B22 is placed on the conductive component C17 to contact the flat spring 19. Finally, the support bracket 21, the flat spring 19, and the washer B22 are fixed to the conductive component C17 by spin riveting, where the washer B22 serves to protect the flat spring 19.

[0034] The ceramic base assembly 7 includes a ceramic base 23, an elastic washer 9, an M3.5 nut 10, an M2 nut 25, and an adjusting screw 24. The ceramic base 23 is processed from ceramic and has 4 part fixing holes and 2 mounting holes. The M2 nut 25 passes through the threaded end of the adjusting screw 24, and the adjusting screw 24 with the M2 nut 25 is placed on the corresponding part fixing hole of the ceramic base 23 so that the M2 nut 25 contacts the ceramic base 23. The conductive component assembly A2, the conductive component assembly B4, and the conductive component assembly C6 pass through the corresponding part fixing holes, and the threaded ends of the conductive component assembly A2, the conductive component assembly B4, and the conductive component assembly C6 pass through the elastic washer 9 and the M3.5 nut 10, and are fixed to the ceramic base 23 by rotating the M3.5 nut 10.

[0035] The housing assembly 8 includes a housing 26, a button 28, and a bushing 27. The housing 26 is machined with a raised hole with a flat end face and two mounting holes. The bushing 27 passes through the raised hole of the housing 26 and is laser welded together. The button 28 is processed from ceramic and passes through the bushing 27, and the button 28 can move in the bushing 27.

[0036] Specifically, the assembly of the mounting sleeve 11 and the washer A12 is as follows:

[0037] The ceramic base assembly 7 is placed at the corresponding position inside the housing assembly 8 by passing two mounting sleeves 11 through the mounting holes of the ceramic base 23 and the mounting holes of the housing 26, so that the ceramic base assembly 7 does not move inside the housing assembly 8. The operating stroke of the detection switch is detected, and by adjusting the adjusting screw 24, the operating stroke of the switch can meet the requirements.

[0038] Furthermore, the washer A12 passes through the small-diameter end of the mounting sleeve 11 to contact the housing 26, and the washer A12 and the mounting sleeve 11 are fixed to the housing assembly 8 by laser welding.

[0039] Preferably, high-temperature glue 29 is applied to the M3.5 nut 10, the elastic washer 9, and the adjusting screw 24 on the ceramic assembly 7, so that the conductive component assembly A2, the conductive component assembly B4, the conductive component assembly C6, and the adjusting screw 24 are fixed to the ceramic base 23.

[0040] Specifically, in the free state, the flat spring piece assembly 5 contacts the contact piece assembly A 1. In the pressed state, the flat spring piece 19 moves downward and contacts the contact piece assembly B 3 to achieve the switch on / off function.

[0041] Preferably, the switch uses ceramics as the insulator and high-temperature resistant elastic materials as the operating mechanism, enabling the switch to be used in an environment with an ultra-high temperature of 538 °C.

[0042] In summary, the present utility model has no plastic parts and is composed of metal and ceramics. It has the advantages of high hardness, anti-aging, anti-radiation, sensitive action, and high parameter accuracy. It has excellent environmental adaptability and high reliability, and is widely applicable to electronics, instruments, aviation, aerospace, and mechanical electrical appliances.

Claims

1. A high temperature micro switch, comprising a housing assembly (8) and a ceramic base assembly (7) installed in the housing assembly (8), characterized in that: The ceramic base assembly (7) is provided with a conductive component assembly A (2), a conductive component assembly B (4), and a conductive component assembly C (6); the conductive component assembly A (2) is riveted with a contact piece assembly A (1); the conductive component assembly B (4) is riveted with a contact piece assembly B (3); and the conductive component assembly C (6) is riveted with a flat spring piece assembly (5).

2. The high temperature micro switch according to claim 1, characterized in that: The ceramic base assembly (7) comprises a ceramic base (23), the ceramic base (23) is provided with a plurality of part fixing holes and mounting holes, and an adjusting screw (24) and an M2 nut (25) are provided in the part fixing block; the housing assembly (8) comprises a housing (26), the housing (26) is provided with a plurality of protruding holes and mounting holes; a shaft sleeve (27) is provided in the protruding hole, and a button (28) is movably connected in the shaft sleeve (27).

3. The high temperature micro switch according to claim 1, characterized in that: The conductive component assembly A (2), conductive component assembly B (4), and conductive component assembly C (6) are respectively connected to the ceramic base assembly (7) via elastic washers (9) and M3.5 nuts (10).

4. The high temperature micro switch according to claim 1, characterized in that: The contact piece assembly A (1) comprises a contact piece A (13) and a fixed contact point (14), wherein the fixed contact point (14) is fixed to one end of the contact piece A (13) by riveting.

5. The high temperature micro switch according to claim 4, characterized in that: The conductive component assembly A (2) comprises a conductive component A (15), and the other end of the contact piece A (13) is connected to the cylindrical end of the conductive component A (15) by riveting.

6. The high temperature micro switch according to claim 1, characterized in that: The contact piece assembly B (3) comprises a contact piece B (18) and a fixed contact (14), wherein the fixed contact (14) is fixed to one end of the contact piece B (18) by riveting.

7. The high temperature micro switch according to claim 6, characterized in that: The conductive component assembly B (4) comprises a conductive component B (16), and the other end of the contact piece B (18) is connected to the cylindrical end of the conductive component B (16) by riveting.

8. The high temperature micro switch according to claim 1, characterized in that: The flat spring assembly (5) comprises a flat spring (19) and a moving contact (20), wherein the moving contact (20) is fixed to one end of the flat spring (19) by riveting.

9. The high temperature micro switch according to claim 8, characterized in that: The conductive component assembly C (6) comprises a conductive component C (17), the other end of the flat spring leaf (19) is connected to the cylindrical end of the conductive component C (17); a support frame (21) is provided between the flat spring leaf (19) and the conductive component C (17), and a gasket B (22) is provided on the upper end surface of the flat spring leaf (19).

10. The high temperature micro switch according to claim 2, characterized in that: The ceramic base component (7) and the shell component (8) are connected by welding via a mounting sleeve (11) and a gasket (12); the mounting sleeve (11) passes through a mounting hole of the ceramic base (23) and a mounting hole of the shell (26); and the gasket (12) passes through the mounting sleeve (11) and contacts the shell (26).

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