A sealed double circuit micro switch

Abstract

The utility model discloses a sealed double loop microswitch, including gap cooperation's sealed shell subassembly and electric contact system, sealed shell subassembly includes the shell, the upper end surface of this shell is equipped with the annular groove, installs the sealing cover in the annular groove, electric contact system includes the press handle, links in the press handle lower end's linkage piece, the middle part of linkage piece is equipped with V type groove and through groove, and the lower part is equipped with the spring, and the through groove horizontal direction is provided with the tension spring, and the movable contact group passes through the tension spring and is connected in the V type groove, and the lower end and the upper end of movable contact group are provided with short conductive piece group and long conductive piece respectively. This switch adopts the double loop structure of 4 outgoing ends, through adopting the tension spring formula double breakpoint electric contact system structure of left and right symmetry, has realized single switch can control two independent circuits, and can control two independent circuits on-off in the double power supply circuit system of voltage load difference with single switch.

Description

Technical Field

[0001] This utility model belongs to the field of electromechanical component technology, specifically relating to a sealed dual-circuit micro switch. Background Technology

[0002] Microswitches, also known as sensitive switches, are characterized by their rapid actuation and high stroke accuracy. However, microswitches are typically unsealed, lacking a sealing function. This unsealed design is a key bottleneck limiting their application in complex environments. Because the internal electrical contacts are directly exposed to the external environment, moisture and dust can easily penetrate the switch and adhere to the contact surfaces in harsh conditions such as humidity, dust, and corrosive gases. This can lead to contact oxidation and corrosion, increased contact resistance, poor contact, and unstable signal transmission. In severe cases, it can even cause short circuits and burnout, directly resulting in equipment malfunction and downtime. Conventional microswitches have only three leads, sharing a single input, which cannot meet the needs of independent control of two sets of load circuits with different voltages in a dual-power supply circuit system. As electronic devices become increasingly complex, multi-power supply and multi-load circuit designs have become the norm, especially in scenarios with high requirements for power supply reliability and safety, where it is often necessary to simultaneously control two independent circuits with different voltage levels and load types.

[0003] These shortcomings have made existing microswitches increasingly inadequate for applications in humid environments and for controlling dual-power, dual-load circuits. There is an urgent need for a new type of microswitch that combines sealing capabilities with independent dual-circuit control to overcome these application bottlenecks. Summary of the Invention

[0004] The purpose of this invention is to provide a sealed dual-circuit micro switch that combines sealing function with dual-circuit independent control capability.

[0005] The technical solution of this utility model is: a sealed dual-circuit micro switch, including a sealed housing assembly with a gap fit and an electrical contact system; The sealed housing assembly includes a housing, the upper end face of which is provided with an annular groove, and a sealing cover is installed in the annular groove; The electrical contact system includes a handle and a linkage plate connected to the lower end of the handle. The linkage plate has a V-shaped groove and a through groove in the middle and a spring sleeved on the lower part. A tension spring is arranged horizontally in the through groove. The movable contact plate group passes through the tension spring and is engaged in the V-shaped groove. The upper and lower ends of the movable contact plate group are respectively provided with contacts, which cooperate with the long conductive plate and the short conductive plate group respectively.

[0006] Furthermore, a pressure ring is interference-fitted at the joint between the outer casing and the sealing cover, and epoxy resin is coated around the joint for sealing.

[0007] Furthermore, a blind hole is provided in the middle of the base, and several through holes are provided around the blind hole; the spring is provided in the blind hole; the long conductive sheet and the short conductive sheet group pass through the corresponding through holes and are interference fit with the base.

[0008] Furthermore, a short conductive sheet group is provided in the through hole near the inner side of the blind hole in the base, and a long conductive sheet is provided in the through hole away from the outer side of the blind hole; both the long conductive sheet and the short conductive sheet group are inverted L-shaped, and their horizontal ends are located on the same vertical line; the circumference of the mating parts of the long conductive sheet and the short conductive sheet group with the base is coated with epoxy resin for sealing.

[0009] Furthermore, the movable contact assembly is flat, with a contact point riveted to one end and a forked V-shaped cutting edge at the other end; The tension spring passes through the through groove of the linkage plate, and hooks are provided at both ends.

[0010] Furthermore, the ball-head contact end of the moving contact assembly is supported on the horizontal end of the short conductive sheet assembly, and the V-shaped cutting edge of its supporting end is engaged in the V-shaped groove of the linkage sheet to form a hinge connection; the hooks at both ends of the tension spring are respectively engaged in the through holes of the moving contact assembly.

[0011] Furthermore, by pressing the handle, the linkage plate is driven to move downward, and the movable contact plate group is lifted through the hinge connection, so that its upper contact point contacts the long conductive plate to conduct electricity; after releasing the handle, under the action of the spring return force, the linkage plate moves upward, driving the movable contact plate group to descend, so that its lower contact point contacts the short conductive plate group to conduct electricity.

[0012] Compared with the prior art, the present invention has the following advantages: (1) The sealed dual-circuit micro switch of this utility model has a perfect sealing structure, can realize dynamic sealing function, is suitable for humid environment, and has higher working reliability.

[0013] (2) The electrical contact system of this utility model adopts a double-circuit structure with four leads. By adopting a left-right symmetrical spring-type double-break electrical contact system structure, it is realized that a single switch can control two independent circuits. A single switch can control the on / off of two independent circuits in a dual power supply circuit system with different voltage loads. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the specific embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1This is an internal schematic diagram of the sealed dual-circuit micro switch of this utility model; Figure 2 yes Figure 1 Side view; Figure 3 This is a structural schematic diagram of the outer shell assembly of this utility model; Figure 4 This is a schematic diagram of the electrical contact system of this utility model; In the figure, 1-handle, 2-sealing cover, 3-pressure block, 4-outer shell, 5-moving contact plate group, 6-long conductive plate, 7-short conductive plate group, 8-base, 9-spring, 10-tension spring, 11-linkage plate, 12-epoxy resin. Detailed Implementation

[0016] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. However, it should not be construed that the scope of the subject matter of the present invention is limited to the following embodiments. Any modifications, substitutions and alterations made based on ordinary technical knowledge and conventional means in the art without departing from the above-described technical concept of the present invention are included within the scope of the present invention.

[0017] like Figures 1 to 4 As shown, this utility model provides a sealed dual-circuit micro switch, including a sealed housing assembly and an electrical contact system.

[0018] In the sealed housing assembly, the lower end of the sealing cover 2 is installed in the annular groove of the housing 4. The pressure ring 3 is fixed to the housing 4 by interference fit, and epoxy resin 12 is applied around the perimeter for sealing, thereby achieving the sealing of this part by squeezing the lower end of the sealing cover 2.

[0019] In the electrical contact system, the lower end of the handle 1 is fixed to the linkage plate 11 by an interference fit. The annular groove in the middle of the handle 1 and the upper end of the sealing cover 2 are dynamically sealed by an interference fit. Two long conductive plates 6 and two short conductive plate groups 7 are fixed to the base 8 by an interference fit, and epoxy resin 12 is applied around the mating parts to seal them. The tension spring 10 is installed in the through groove in the middle of the linkage plate 11. The hooks at both ends are hooked into the holes of the two moving contact plate groups 5 on the left and right sides, respectively. The V-shaped cutting edge of one end of the moving contact plate group 5 is stuck in the "V" groove in the middle of the linkage plate 11 to achieve a hinge connection. The contacts at both ends of the moving contact plate group 5 are in contact with the contacts on the short conductive plate groups 7 on the left and right sides, respectively. The spring 9 is installed in the blind hole in the middle of the base 8, and the lower end of the linkage plate 11 is installed inside the spring 9.

[0020] The sealed housing assembly and the electrical contact system are fitted with a gap and sealed with epoxy resin 12 around the perimeter to achieve sealing and fastening. After the fit, the tension spring 10 is in a stretched state, which generates pressure between the contacts on the moving contact pieces 5 at the left and right ends and the short conductive piece group 7 to ensure reliable electrical contact. The spring 9 is always in a compressed state to ensure the pre-tightening effect of the electrical contact system and realize the automatic reset of the switch.

[0021] The working principle of this utility model is as follows: Figure 1 As shown, when the switch is in the free state, the handle 1 remains in the state shown under the preload of the spring 9. At this time, the tension spring 10 is in the stretched state, causing the contacts on the left and right moving contact groups 5 to generate pressure between the contacts and the short conductive sheet groups 7 respectively, thus achieving conductivity between the left and right short conductive sheet groups 7; the left and right long conductive sheets 6 are in an open circuit state. When an external driving force acts on the handle 1, it compresses axially and pushes the linkage plate 11 to move. The hinge connection between the moving contact group 5 and the linkage plate 11 moves downward. When it moves to the critical position, the left and right moving contact groups 5 move together. When the switch flips in the reverse direction, its upper contacts contact the contacts on the left and right long conductive plates 6 respectively, and the tension spring 10 is in a stretched state, so that the contacts on the left and right moving contact groups 5 respectively generate pressure between the long conductive plates 6, and the left and right long conductive plates 6 are connected; the left and right short conductive plate groups 7 are in an open circuit state, realizing the circuit switching; at this time, the spring 9 is always in a compressed state. When the pressing force on the handle 1 is removed, the micro switch returns to the initial position state under the action of the spring 9's reset force, and the circuit is converted to the initial state, realizing one action cycle.

[0022] The sealed dual-circuit micro switch provided by this utility model has been described in detail above. Specific examples have been used to illustrate the structure and working principle of this utility model. The descriptions of the embodiments above are only for the purpose of helping to understand the method and core idea of ​​this utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made to this utility model without departing from the principle of this utility model, and these improvements and modifications also fall within the scope of protection of the claims of this utility model.

Claims

1. A sealed dual-circuit micro switch, characterized in that: This includes a clearance-fitted sealed housing assembly and an electrical contact system; The sealed housing assembly includes a housing (4), the upper end face of which is provided with an annular groove, and a sealing cover (2) is installed in the annular groove. The electrical contact system includes a handle (1) and a linkage piece (11) connected to the lower end of the handle (1). The linkage piece (11) has a V-shaped groove and a through groove in the middle and a spring (9) sleeved on the lower part. A tension spring (10) is arranged in the horizontal direction of the through groove. The movable contact piece group (5) passes through the tension spring (10) and is engaged in the V-shaped groove. The upper end and lower end of the movable contact piece group (5) are respectively provided with contacts and cooperate with the long conductive piece (6) and the short conductive piece group (7) respectively.

2. The sealed dual-circuit micro switch according to claim 1, characterized in that: The joint between the outer shell (4) and the sealing cover (2) is fitted with a pressure ring (3), and epoxy resin (12) is applied around the joint for sealing.

3. The sealed dual-circuit micro switch according to claim 1, characterized in that: A blind hole is provided in the middle of the base (8), and several through slots are provided around the blind hole; the spring (9) is provided in the blind hole; the long conductive sheet (6) and the short conductive sheet group (7) pass through the corresponding through slots and are interference fit with the base (8).

4. The sealed dual-circuit micro switch according to claim 3, characterized in that: In the base (8), a short conductive sheet group (7) is provided in the through groove near the inner side of the blind hole, and a long conductive sheet (6) is provided in the through groove away from the outer side of the blind hole; the long conductive sheet (6) and the short conductive sheet group (7) are both inverted L-shaped, and their horizontal ends are located on the same vertical line; the mating parts of the long conductive sheet (6) and the short conductive sheet group (7) with the base (8) are coated with epoxy resin (12) and sealed.

5. The sealed dual-circuit micro switch according to claim 1, characterized in that: The moving contact assembly (5) is flat, with a spherical contact point riveted to one end and a V-shaped cutting edge at the other end. A U-shaped through groove is provided to split the V-shaped cutting edge into a forked support end, and a through hole is provided near the contact point. The tension spring (10) has hooks at both ends and passes through the through groove of the linkage plate (11) in the middle.

6. The sealed dual-circuit micro switch according to claim 1 or 5, characterized in that: The ball-head contact end of the moving contact assembly (5) is supported on the horizontal end of the short conductive sheet assembly (7), and the V-shaped cutting edge of its support end is engaged in the V-shaped groove of the linkage sheet (11) to form a hinge connection; the hooks at both ends of the tension spring (10) are respectively engaged in the through holes of the moving contact assembly (5).

7. The sealed dual-circuit micro switch according to claim 1, characterized in that: By pressing the handle (1), the upper contact of the moving contact assembly (5) is brought into contact with the long conductive sheet (6), and the handle (1) is released to bring the lower contact of the moving contact assembly (5) into contact with the short conductive sheet assembly (7).

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