Explosion-proof ship-shaped switch
By installing a sealing isolation sleeve on the shell of the ship-shaped switch and supporting springs with pillars and blind hole structures, the spark leakage, poor sealing and high humidity environments of existing ship-shaped switches when used in explosive flammable gases or explosive dust environments is solved. The problems of corrosion and easy circuit breakage of the medium contacts achieve good sealing and waterproofing performance and improve working reliability.
Patent Information
- Application Number
- CN202421231821.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-31
- Publication Date
- 2025-02-21
- Estimated Expiration
- 2034-05-31
AI Technical Summary
When used in explosive flammable gas or explosive dust, existing ship-shaped switches have problems such as spark leakage, poor sealing, corrosive contacts and easy circuit breakage in high humidity environments, which reduces working reliability.
An explosion-proof ship-shaped switch is designed. By installing a sealing isolation sleeve on the shell and supporting the spring with a pillar and a blind hole structure, the buttons and conductive components are sealed and isolated, ensuring that sparks do not leak when the dynamic and static contacts come into contact.
It achieves good sealing and waterproofing performance in flammable and explosive and high humidity environments, avoids spark leakage and contact corrosion, and improves the working reliability of the switch.
Smart Images
Figure CN222514858U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to an explosion-proof rocker switch, belonging to the technical field of rocker switches. Background Art
[0002] The rocker switch is often used as a power switch for electronic devices. The existing rocker switch is usually composed of a housing, a button, a terminal assembly and a conductive assembly. The terminal assembly and the conductive assembly are arranged in the housing, and the button is arranged on the upper part of the housing. The switch circuit is turned on and off by operating the button. However, when the switch circuit is turned on, sparks will be generated at the moment of contact between the moving and static contacts. The button is connected to the inner cavity of the housing and does not have sealing properties. Therefore, the conventional rocker switch cannot be used for equipment in an environment with explosive gas or explosive dust. In a high-humidity environment, the contacts are corroded, and a circuit breaker phenomenon is easily generated during the switch operation, which reduces the working reliability.
[0003] In order to seal the boat switch, one structure is to use a sealing sleeve made of a material with good sealing performance to cover the upper part of the shell, so as to seal and isolate the button and the shell from the outside. Once the sealing sleeve is damaged, the sealing efficiency is destroyed. Another structure is to add a partition in the shell to isolate the lower contact cavity from the button. However, when the button is operated, the spring at the bottom of the button controls the movement of the bridge piece, so a long through hole is provided on the partition, so that the swinging part of the button passes through the long through hole and can swing back and forth along the strip through hole, and there is still a gap between the swinging part of the button and the partition and the strip through hole, so it cannot be well sealed. Summary of the invention
[0004] The utility model aims to provide an explosion-proof boat-shaped switch which has reasonable structure, convenient assembly, reliable sealing and good explosion-proof and waterproof performance.
[0005] The utility model provides a technical solution to achieve the above-mentioned purpose: an explosion-proof boat-shaped switch, comprising a button, a shell, a terminal assembly and a conductive assembly, characterized in that: the button is hinged on the upper part of the shell, a downwardly extending pillar is provided in the middle of the button, and the pillar is provided with a blind hole for supporting and limiting the spring; the terminal assembly comprises a stationary contact piece and a fulcrum piece with a stationary contact, and the stationary contact piece and the fulcrum piece are sealed and fixed on the bottom plate of the shell and pass through the bottom plate; the conductive assembly comprises a bridge piece and a spring, the bridge piece is provided with a moving contact corresponding to the stationary contact, one side of the bridge piece is supported on the fulcrum piece, the upper side of the spring is installed in the blind hole of the pillar, and the lower side is installed on the spring seat on the fulcrum piece; the sealing isolation sleeve is installed in the shell, and the upper part of the sealing isolation sleeve is sealed and connected to the outer periphery of the pillar, and the lower part is sealed and connected to the inner cavity of the shell, and the conductive assembly and the button are isolated.
[0006] The utility model improves the explosion-proof boat-shaped switch, and a downward pillar is provided in the middle of the button, and the blind hole in the pillar supports and limits one end of the spring. By installing a sealing isolation sleeve in the inner cavity of the shell, the upper part of the sealing isolation sleeve is sealed and connected to the outer periphery of the pillar, and the lower part is sealed and connected to the inner cavity of the shell, so that the button and the conductive component can be sealed and completely isolated. In an inflammable and explosive environment, the spark generated by the contact of the moving and static contacts of the switch will not leak out, and at the same time, it has a good waterproof and dustproof effect, is not easy to corrode the moving and static contacts, eliminates safety hazards, and improves the working reliability of the boat-shaped switch. The utility model has a simple structure, is easy to assemble, and has reliable sealing, and can be used in equipment in inflammable, explosive, and high-humidity environments. BRIEF DESCRIPTION OF THE DRAWINGS
[0007] The embodiments of the present utility model are further described in detail below in conjunction with the accompanying drawings.
[0008] Figure 1 It is a structural schematic diagram of the utility model explosion-proof rocker switch when it is disconnected.
[0009] Figure 2 It is a structural schematic diagram of the utility model explosion-proof rocker switch when it is turned on.
[0010] Figure 3 It is a schematic diagram of the exploded structure of the utility model explosion-proof rocker switch.
[0011] Among them: 1—housing, 1-1—inner convex rib column, 1-2—hinge hole, 2—button, 2-1—pillar, 2-2—blind hole, 2-3—convex shaft, 3—spring, 4—flexible spacer, 4-1—upper hole, 4-2—upper ring edge, 4-3—lower hole, 4-4—lower ring edge, 5—support frame, 6—moving contact, 7—bridge piece, 7-1—spring seat, 7-2—support piece, 7-3—contact fixing part, 8—stationary contact, 9—stationary contact piece, 9-1—stationary contact seat, 10—fulcrum piece, 10-1—bending part, 10-2—support part. DETAILED DESCRIPTION
[0012] See Figures 1 to 3 As shown, an explosion-proof rocker switch of the utility model comprises a button 2, a housing 1, a terminal assembly and a conductive assembly. The button 2 is hinged at the upper part of the housing 1. Figure 3 As shown, the housing 1 of the utility model is an open shell structure, and hinge holes 1-2 are provided on both sides of the upper part of the housing 1, and corresponding convex shafts 2-3 are provided on both sides of the button 2. The two convex shafts 2-3 are correspondingly installed in the hinge holes 1-2 of the housing 1, so that the operating button 2 swings along its hinge center. Figures 1 to 3As shown, the button 2 of the utility model is provided with a downwardly extending pillar 2-1 in the middle, and the pillar 2-1 is provided with a blind hole 2-2 for supporting and limiting the spring 3. Therefore, one side of the spring 3 is installed on the button 2. During the swinging process of the button 2, the pillar 2-1 controls the twisting of the spring 3 and controls the bridge piece 7 to swing along its supporting part, thereby realizing the contact or disconnection of the moving and static contacts.
[0013] See Figures 1 to 3 As shown, the terminal assembly of the utility model includes a stationary contact piece 9 and a fulcrum piece 10 with a stationary contact 8, the stationary contact 8 is fixed on the stationary contact seat 9-1 of the stationary contact piece 9, the stationary contact piece 9 and the fulcrum piece 10 are sealed and fixed on the bottom plate of the shell 1 and pass through the bottom plate, the stationary contact piece 9 and the fulcrum piece 10 can be fixed to the bottom of the shell 1 by insulating resin glue, the stationary contact piece 9 and the fulcrum piece 10 are sealed and fixed on the shell 1, the stationary contact piece 9 and the fulcrum piece 10 are connected to the corresponding electrode pieces, and the control circuit is turned on or off.
[0014] See Figures 1 to 3 As shown, the conductive component of the utility model includes a bridge piece 7 and a spring 3. The bridge piece 7 has a moving contact 6 corresponding to the static contact 8. One side of the bridge piece 7 is supported on the fulcrum piece 10. The upper side of the spring 3 is installed in the blind hole 2-2 of the support 2-1, and the lower side is installed on the spring seat 7-1 on the fulcrum piece 10. Therefore, the spring 3 is used to swing the bridge piece 7 along the fulcrum piece 10 to contact or disconnect the moving contact 6 on the bridge piece 7 with the static contact 8.
[0015] See Figures 1 to 3 As shown, the spring seat 7-1 on the bridge piece 7 of the utility model is a raised step shape, and one end of the spring 3 is on the step surface, so it is convenient to limit the spring 3, and the bridge piece 7 is provided with an extended support piece 7-2 on both sides of the spring seat 7-1, and the bridge piece 7 passes through an upward inclined surface from the spring seat 7-1 to the contact fixing part 7-3, and the moving contact 6 is fixed on the contact fixing part 7-3, so that the bridge piece 7 has a good strength. Figures 1 to 3 As shown, the upper part of the fulcrum piece 10 of the utility model has a middle bending portion 10-1 and supporting portions 10-2 on both sides. The fulcrum piece 10 can be quickly positioned through the bending portion 10-1, and the contact area between the fulcrum piece 10 and the bottom plate can also be expanded. The thickness of the supporting portion 10-2 gradually becomes thinner upwards, such as the supporting portion 10-2 gradually shrinks to the top through an inclined surface, or the top of the supporting portion 10-2 adopts an arc shape. The supporting portion 10-2 on the fulcrum piece 10 is connected to the supporting piece 7-2, so that the bridge piece 7 can swing reliably along the supporting portion 10-2 of the fulcrum piece 10.
[0016] See Figures 1 to 3As shown, the sealing isolation sleeve of the utility model is installed in the housing 1, and the sealing isolation sleeve is located at the lower part of the hinge hole 1-2 of the housing 1. The upper part of the sealing isolation sleeve is sealed and connected to the outer periphery of the pillar 2-1, and the lower part is sealed and connected to the inner cavity of the housing 1 and isolates the conductive component from the button 2. Therefore, the sealing isolation sleeve completely isolates the upper part of the housing 1 where the button 2 cavity is located and the lower part where the conductive component is located, so that the boat switch has a good sealing performance. Figures 1 to 3 As shown, the sealing isolation sleeve of the utility model includes a flexible sleeve 4 and a ring-shaped support frame 5. The outer peripheral shape of the support frame 5 corresponds to the cavity of the shell 1. The support frame 5 is installed on the inner convex rib column 1-1 of the inner cavity of the shell 1. The inner convex rib column 1-1 can be set on both sides of the long side of the inner cavity. The upper hole 4-1 of the flexible sleeve 4 is sealed and connected with the pillar 2-1. The lower hole 4-3 of the flexible sleeve is covered on the outer periphery of the support frame 5 and is sealed and connected with the inner cavity of the shell 1, which is convenient for installing the sealing isolation sleeve in the shell 1. Figure 1 , 2 As shown, the flexible spacer 4 of the utility model is provided with an upper ring edge 4-2 matching the upper plane of the support frame 5 at the upper part of the lower opening 4-3, and a lower ring edge 4-4 matching the lower plane of the support frame 5 at the bottom. The flexible spacer 4 is sleeved on the support frame 5, and the upper ring edge 4-2 and the lower ring edge 4-4 of the flexible spacer 4 are respectively connected to the upper plane and the lower plane of the support frame 5, and the upper and lower parts of the cavity of the housing 1 are reliably sealed by the flexible spacer 4. The flexible spacer 4 of the utility model is an integrated structure with the support frame 5, and the flexible spacer 4 and the support frame 5 are made of rubber material. Figure 3 As shown, the flexible spacer sleeve 4 and the support frame 5 of the utility model are split structures. The flexible spacer sleeve 4 is made of rubber material, and the support frame 5 is made of plastic or rubber material, which is convenient for replacement of the flexible spacer sleeve 4 during maintenance.
[0017] See Figures 1 to 3 As shown, the pillar 2-1 on the button 2 of the utility model includes a conical column and a straight column from top to bottom, the blind hole 2-2 on the pillar 2-1 is a stepped hole, and the spring 3 is conveniently positioned and installed through the stepped hole. The upper hole 4-1 on the flexible spacer 4 is sleeved between the conical column and the straight column and is sealed and connected to the pillar 2-1. The conical column of the utility model can be an elliptical conical column with a larger upper part and a smaller lower part, and the straight column is an elliptical column. The conical column of the utility model can also be a circular conical column with a larger upper part and a smaller lower part, and the straight column is a circular column. Therefore, the upper hole 4-1 on the flexible spacer 4 can be reliably sleeved on the pillar 2-1 and sealed.
[0018] See Figure 1 As shown, the operating button 2 is pressed down to the left along the convex shaft 2-3 and swings, the support 2-1 moves and drives the spring 3 to bend to the right, the moving contact 6 on the bridge piece 7 is disconnected from the static contact 8, and the explosion-proof boat switch control circuit is in the disconnected state. Figure 2As shown, when the operating button 2 is pressed down to the right along the convex shaft 2-3 and swings, the pillar 2-1 moves and drives the spring 3 to bend to the left, the moving contact 6 on the bridge piece 7 contacts the static contact 8, and the explosion-proof boat-shaped switch controls the circuit to be connected. During the operation of the button 2, the upper hole 4-1 of the flexible spacer 4 always remains sealed with the swing of the pillar 2-1, and the lower hole 4-3 of the flexible spacer 4 is always sealed with the inner cavity of the housing 1, and has good sealing performance. The explosion-proof boat-shaped switch of the utility model can be used for equipment in explosive environments of flammable gas, steam, mist gas or flammable dust.
Claims
1. An explosion-proof rocker switch, comprising a button, a housing, a terminal assembly and a conductive assembly, characterized in that: The button is hinged on the upper part of the shell, and a downwardly extending pillar is provided in the middle part of the button. The pillar is provided with a blind hole for supporting and limiting the spring; the terminal assembly includes a static contact piece and a fulcrum piece with a static contact, and the static contact piece and the fulcrum piece are sealed and fixed on the bottom plate of the shell and pass through the bottom plate; the conductive component includes a bridge piece and a spring, and the bridge piece has a moving contact corresponding to the static contact, and one side of the bridge piece is supported on the fulcrum piece, and the upper side of the spring is installed in the blind hole of the pillar and the lower side is installed on the spring seat on the fulcrum piece; the sealing isolation sleeve is installed in the shell, and the upper part of the sealing isolation sleeve is sealed and connected to the outer periphery of the pillar, and the lower part is sealed and connected to the inner cavity of the shell to isolate the conductive component from the button.
2. The explosion-proof rocker switch according to claim 1, characterized in that: The sealing isolation sleeve includes a flexible spacer and a ring-shaped support frame. The support frame is installed on the inner convex rib column of the shell cavity. The upper hole of the flexible spacer is sealed and connected to the pillar. The lower hole of the flexible sleeve is covered on the outer periphery of the support frame and is sealed and connected to the shell cavity.
3. The explosion-proof rocker switch according to claim 2, characterized in that: The flexible spacer is provided with an upper ring edge matching the upper plane of the support frame at the upper part of the lower hole, and a lower ring edge matching the lower plane of the support frame at the bottom. The flexible spacer is sleeved on the support frame, and the upper ring edge and lower ring edge of the flexible spacer are respectively connected to the upper plane and lower plane of the support frame.
4. An explosion-proof rocker switch according to claim 2 or 3, characterized in that: The flexible spacer and the support frame are an integrated structure, and the flexible spacer and the support frame are made of rubber material.
5. An explosion-proof rocker switch according to claim 2 or 3, characterized in that: The flexible spacer and the support frame are separate structures. The flexible spacer is made of rubber material, and the support frame is made of plastic or rubber material.
6. The explosion-proof rocker switch according to claim 2, characterized in that: The pillar on the button includes a conical pillar and a straight pillar from top to bottom, the blind hole on the pillar is a step hole, and the upper hole on the flexible spacer is sleeved between the conical pillar and the straight pillar and is sealed and connected to the pillar.
7. The explosion-proof rocker switch according to claim 1, characterized in that: The spring seat on the bridge piece is in the shape of a raised step, one end of the spring is against the step surface, the bridge piece is provided with outwardly extending supporting pieces on both sides of the spring seat, and the bridge piece extends from the spring seat through an upward inclined surface to the contact fixing part, and the moving contact is fixed on the contact fixing part.
8. The explosion-proof rocker switch according to claim 1, characterized in that: The upper part of the fulcrum sheet has a middle bending part and supporting parts on both sides, the thickness of the supporting parts gradually becomes thinner upwards, and the supporting parts on the fulcrum sheet are connected to the supporting sheet.