CN114927363B - Dustproof passenger train micro-gap switch - Google Patents
Dustproof passenger train micro-gap switch Download PDFInfo
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- CN114927363B CN114927363B CN202210643423.XA CN202210643423A CN114927363B CN 114927363 B CN114927363 B CN 114927363B CN 202210643423 A CN202210643423 A CN 202210643423A CN 114927363 B CN114927363 B CN 114927363B
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- 238000007789 sealing Methods 0.000 claims description 41
- 239000000428 dust Substances 0.000 claims description 7
- 238000002347 injection Methods 0.000 claims description 3
- 239000007924 injection Substances 0.000 claims description 3
- 230000008094 contradictory effect Effects 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 4
- 239000012634 fragment Substances 0.000 description 8
- 230000008878 coupling Effects 0.000 description 6
- 238000010168 coupling process Methods 0.000 description 6
- 238000005859 coupling reaction Methods 0.000 description 6
- 238000004146 energy storage Methods 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 238000009434 installation Methods 0.000 description 3
- 210000002421 cell wall Anatomy 0.000 description 2
- 230000003068 static effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000010891 electric arc Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H13/00—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch
- H01H13/02—Details
- H01H13/12—Movable parts; Contacts mounted thereon
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H1/00—Contacts
- H01H1/58—Electric connections to or between contacts; Terminals
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H13/00—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch
- H01H13/02—Details
- H01H13/04—Cases; Covers
- H01H13/06—Dustproof, splashproof, drip-proof, waterproof or flameproof casings
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H13/00—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch
- H01H13/02—Details
- H01H13/12—Movable parts; Contacts mounted thereon
- H01H13/20—Driving mechanisms
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H13/00—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch
- H01H13/02—Details
- H01H13/26—Snap-action arrangements depending upon deformation of elastic members
- H01H13/36—Snap-action arrangements depending upon deformation of elastic members using flexing of blade springs
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
- H01H9/30—Means for extinguishing or preventing arc between current-carrying parts
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Switch Cases, Indication, And Locking (AREA)
- Push-Button Switches (AREA)
Abstract
The application relates to the field of microswitches, and particularly discloses a dust-proof passenger car microswitch, which comprises a shell and a pressing column arranged on the shell in a sliding manner, wherein an electric cavity is formed in the shell, a public terminal, a middle terminal and a side terminal are arranged in the electric cavity, the middle terminal is positioned between the public terminal and the side terminal, the end part of the pressing column stretches into the electric cavity, the dust-proof passenger car microswitch further comprises a contact piece, a driving piece and an elastic piece, one end of the contact piece is connected to the public terminal, the other end of the contact piece is provided with a movable contact, the side terminal is provided with a normally open contact, the middle terminal is provided with a normally closed contact, the normally open contact and the normally closed contact are both positioned on a moving path of the movable contact, one end of the driving piece is rotatably arranged in the electric cavity, the other end of the driving piece is abutted against the end part of the pressing column, the two ends of the elastic piece are respectively abutted against the driving piece and the contact piece, and the elastic piece is used for driving the contact piece to reset. The application has the effect of expanding the application range of the micro switch.
Description
Technical Field
The application relates to the field of microswitches, in particular to a dust-proof passenger car microswitch.
Background
The micro-switch is a contact mechanism, has the characteristics of sensitive switching on and off, small volume, small contact distance, high control precision and the like, and has very wide application in the fields of electronic equipment, power systems, household appliances, instruments, mines and the like, and plays an irreplaceable role.
In the related art, the micro-gap switch includes the casing, slide the pressing piece that sets up on the casing, have elastic contact piece and three terminal, presses the pressing piece and contradicts and be used for driving the contact piece swing with the contact piece. The contact piece is connected with one of them terminal, all is provided with the stationary contact on the other two terminals, is provided with the movable contact on the contact piece, and the movable contact is located between two stationary contacts. When the circuit is switched, the pressing block is pressed down, and the end part of the contact piece is driven to swing towards the moving direction of the pressing block by the pressing block, so that the movable contact is abutted against one of the fixed contacts. After the force applied to the pressing block is removed, the contact piece is reset, so that the movable contact is abutted against the other fixed contact. Namely, the static contact facing the pressing block pressing direction is a normally closed contact, and the static contact facing away from the pressing block pressing direction is a normally open contact.
In carrying out the present application, the inventors have found that at least the following problems exist in this technology: in actual application, when the micro-gap switch needs to be pressed down to the pressing block, the movable contact is abutted against the stationary contact facing away from the pressing block in the pressing direction, and when the pressing block is not stressed, the movable contact is abutted against the stationary contact facing the pressing block in the pressing direction, so that the micro-gap switch in the related art cannot be realized, has a small application range and needs to be improved.
Disclosure of Invention
In order to expand the application range of the micro-switch, the application provides a dust-proof passenger car micro-switch.
The application provides a dustproof passenger car microswitch which adopts the following technical scheme:
The dustproof passenger car micro switch comprises a shell and a pressing column arranged on the shell in a sliding manner, wherein an electric cavity is formed in the shell, a public terminal, a middle terminal and a side terminal are arranged in the electric cavity, the middle terminal is positioned between the public terminal and the side terminal, the end part of the pressing column stretches into the electric cavity,
The electric contact device comprises a contact piece, a driving piece and an elastic piece, wherein one end of the contact piece is connected to a common terminal, a movable contact is arranged at the other end of the contact piece, a normally open contact is arranged on a side terminal, a normally closed contact is arranged on a middle terminal, the normally open contact and the normally closed contact are both positioned on a moving path of the movable contact, one end of the driving piece is rotatably arranged in an electric cavity, the other end of the driving piece is abutted against the end part of a pressing column, two ends of the elastic piece are respectively abutted against the driving piece and the contact piece, and the elastic piece is used for driving the contact piece to reset;
When the elastic sheet and the contact piece are in a natural state, the movable contact is abutted against the normally closed contact, the pressing column is used for driving the end part of the driving piece to drive the end part of the contact piece to swing until the movable contact is abutted against the normally open contact, the direction of the pressing column when the pressing column moves and drives the end part of the driving piece to move is a downward pressing direction, and the normally open contact and the normally closed contact are sequentially distributed along the downward pressing direction.
By adopting the technical scheme, when the elastic sheet and the contact sheet are not subjected to external force, namely when the pressing column is not stressed, the elastic sheet and the contact sheet are both in a natural state, and the movable contact is abutted against the normally closed contact at the moment. When the circuit is switched, the pressing column is pressed downwards along the pressing direction, the pressing column is propped against the driving piece and drives the end part of the driving piece, which is propped against the pressing column, to swing, so that the elastic piece is driven to compress and swing, the elastic piece transmits force until the end part of the contact piece, which is provided with the movable contact, swings and swings until the movable contact is propped against the normally open contact. After the force applied to the pressing column is removed, the contact piece is reset under the action of the elastic piece, so that the movable contact moves to collide with the normally closed contact again.
The micro switch that so set up for when pushing down the press post, the normally open contact who presses the direction dorsad can contradict with the movable contact, when not exerting force to pressing the post, the normally closed contact who presses the direction contradicts with the movable contact. Namely, different circuit connection modes are realized under the condition that the connection modes of the middle terminal and the side terminal are not changed.
The design is ingenious, and the application range of the micro switch is enlarged.
Optionally, the contact piece is provided with the connecting block, set up the connecting hole that is used for supplying the connecting block to insert on the shell fragment.
Through adopting above-mentioned technical scheme, when connecting shell fragment and contact, insert the connecting block in the connecting hole to the relative contact piece of the tip of restriction shell fragment and contact conflict removes, has improved the stability that shell fragment and contact are connected.
Optionally, the shell fragment includes protruding arc piece, supports the anter of tight contact piece and supports the back piece of tight drive piece, protruding arc piece is protruding along pushing down the direction, anter and back piece are connected at protruding arc piece's both ends respectively.
By adopting the technical scheme, when the elastic sheet is installed, the front sheet and the rear sheet are moved in opposite directions, so that the protruding radian of the protruding arc sheet is increased. And then the front piece is abutted against the contact piece, the rear piece is abutted against the driving piece, and the elastic piece is in a pre-tightening state, so that the front piece abuts against the contact piece, and the rear piece abuts against the contact piece. Because the convex arc piece is convex along the downward pressing direction, the slightly bent convex arc piece applies force towards the downward pressing direction to the contact piece through the front piece, so that the movable contact can keep abutting against the normally closed contact, and the arc discharge phenomenon is avoided as much as possible.
Optionally, be provided with the support in the electric cavity, be provided with the rotation arch on the support, the driver blade includes the connecting strip, connects the connecting hook in connecting strip one end and connects the pretension piece in connecting hook keep away from pressing post one side, the connecting hook colludes to establish on the rotation arch, the pretension groove has been seted up on the terminal surface that protruding arc piece was kept away from to the back plate, the tip of pretension piece stretches into the pretension groove, just the tip of pretension piece with support the cell wall in tight pretension groove.
Through adopting above-mentioned technical scheme, when installing the driving piece, collude the coupling hook earlier and establish on rotating the arch, press preceding piece and back piece again in order to increase protruding arc piece's protruding radian, support the preceding piece and press on the contact piece at last, pack the pretension piece into pretension groove and make the tip of pretension piece support the cell wall in pretension groove. Through the structure, the elastic sheet not only has the function of resetting the contact sheet, but also has the function of installing and fixing the driving sheet.
Optionally, the casing includes base and apron, electric chamber is enclosed by base and apron and is formed, be provided with the sealing washer between base and the apron, base and apron all contradict with the sealing washer.
By adopting the technical scheme, the split type design of base and apron is convenient for normally open contact, normally closed contact, contact piece, shell fragment, drive piece, support and the installation of pressing post. The sealing ring limits dust and water from entering the electric cavity from the gap between the base and the cover plate, and the dust and water resistance of the micro switch is improved.
Optionally, a sealing ring groove is formed in the end face, facing the base, of the cover plate, and the end part of the sealing ring is inserted into the sealing ring groove.
By adopting the technical scheme, the end part of the sealing ring is inserted into the sealing ring groove, so that the sealing ring is limited to slide on the base and the cover plate, on one hand, the installation of the sealing ring is facilitated, and on the other hand, the dustproof and waterproof performance of the micro switch is further improved.
Optionally, the base is integrally injection molded, and the common terminal, the middle terminal and the side terminal are all adhered to the base when the base is integrally molded.
By adopting the technical scheme, the public terminal, the middle terminal and the side terminal are adhered to the base when the base is integrally formed, so that the installation procedure is reduced, the structural strength of the micro switch is improved, and the dustproof and waterproof performances of the micro switch are further improved.
Optionally, the sliding tray that is linked together with electric chamber has been seted up on the apron, press the post slip setting in the sliding tray, press the one end of post to stretch out outside the casing, press the post to be equipped with the seal cover in the outer tip cover of casing, the seal cover is fixed on the apron, just the seal cover shields the opening that the sliding tray kept away from electric chamber.
By adopting the technical scheme, the sealing sleeve shields the opening of the sliding groove far away from the electric cavity, so that dust and water are prevented from entering the electric cavity through the sliding groove, and the dust and water resistance of the microswitch is improved.
Optionally, be provided with the stopper on the contact, be provided with the gag lever post on the lateral wall of connecting strip, be provided with on the stopper and be used for with the spacing face of contradicting, the spacing face extends along the rotation direction of gag lever post, when pressing the post and removing along the push down direction and reaching maximum stroke, the gag lever post is staggered with the spacing face.
Through adopting above-mentioned technical scheme, when switching the circuit, push down the pressure lever, the tip of pressure lever supports and presses on the drive piece and drive the drive piece and rotate, and the tip of drive piece supports and presses on the shell fragment and drives the back piece and move to the direction that is close to the front bezel to make protruding arc piece's protruding radian increase, the shell fragment energy storage. When the driving piece rotates, the limiting rod is driven to move, and the limiting rod is propped against the limiting surface to limit the contact piece to swing under the action of the elastic piece. When the pressing column moves along the pressing direction to reach the maximum stroke, the convex arc piece reaches the maximum deformation degree under the action of the driving piece and the pressing column, namely the energy storage of the elastic piece reaches the maximum value, the limiting rod is staggered with the limiting surface, and the elastic piece releases force and drives the end part of the contact piece provided with the movable contact to move rapidly, so that the effect that the movable contact is disconnected from the normally-closed contact rapidly and contacts with the normally-open contact rapidly is achieved. Through the structure, the micro switch provided by the application realizes quick on-off, reduces the generation of arcing phenomenon, and protects the movable contact, the normally-closed contact and the normally-open contact.
In summary, the present application includes at least one of the following beneficial technical effects:
1. When the pressing column is pressed downwards along the pressing direction, the movable contact is in conflict with the normally closed contact in the back pressing direction through the linkage of the driving sheet, the elastic sheet and the contact sheet, and after the force applied to the pressing column is removed, the contact sheet is reset to the movable contact to be in conflict with the normally closed contact under the action of the elastic sheet; through the structure, the micro switch of the application realizes different circuit connection modes without changing the connection modes of the middle terminal and the side terminal, and expands the application range of the micro switch;
2. The middle terminal, the side terminal and the common terminal are adhered to the base when the base is integrally formed through the sealing ring, the sealing ring groove and the sealing sleeve, so that the dustproof and waterproof performances of the micro switch are greatly enhanced, and the service life of the micro switch is prolonged;
3. through the limiting block, the limiting surface and the limiting block, the micro switch can be rapidly switched on and off, and the arcing phenomenon is reduced, so that the movable contact, the normally-closed contact and the normally-open contact are protected.
Drawings
Fig. 1 is a schematic structural view of embodiment 1 of the present application.
Fig. 2 is a schematic cross-sectional view of embodiment 1 of the present application with the lever and roller removed.
FIG. 3 is a schematic cross-sectional view showing a contact piece in example 1 of the present application.
Fig. 4 is a schematic structural diagram of a protruding stopper and a stopper rod in embodiment 2 of the present application.
Reference numerals illustrate:
1. A housing; 11. a base; 12. a cover plate; 121. sealing ring grooves; 122. sealing grooves; 123. a sliding groove; 124. a lever; 125. a roller; 13. an electrical cavity; 131. a common terminal; 132. a middle terminal; 133. a side terminal; 134. an extension terminal; 135. a normally closed contact; 136. a normally open contact; 14. a seal ring; 15. sealing sleeve; 2. pressing the column; 3. a contact piece; 31. a relief groove; 32. a connecting block; 33. a movable contact; 4. a driving plate; 41. a connecting hook; 42. a connecting strip; 421. a limit rod; 43. a pre-tightening block; 5. a spring plate; 51. a front sheet; 511. a connection hole; 52. a convex arc piece; 53. a rear sheet; 531. a pre-tightening groove; 6. a bracket; 61. rotating the protrusion; 62. a through hole; 7. a limiting block; 71. a support block; 72. a limit stop; 721. and a limiting surface.
Detailed Description
The application is described in further detail below with reference to fig. 1-4.
The embodiment of the application discloses a dust-proof passenger car micro switch.
Example 1:
Referring to fig. 1, the dust-proof passenger car micro-switch comprises a shell 1, wherein the shell 1 comprises a base 11 and a cover plate 12, and a pressing column 2 is slidably arranged on the cover plate 12. The base 11 and the cover 12 enclose an electrical cavity 13, and a common terminal 131, a middle terminal 132, a side terminal 133, a contact piece 3, a driving piece 4, a spring piece 5 and a bracket 6 are arranged in the electrical cavity 13.
Referring to fig. 2, a sealing ring groove 121 is formed on an end surface of the cover plate 12 facing the base 11, and a sealing ring 14 is arranged between the cover plate 12 and the base 11, wherein the sealing ring 14 is a rubber ring with elasticity. The end of the seal ring 14 is inserted into the seal ring groove 121, and both ends of the seal ring 14 respectively abut against the cover plate 12 and the groove wall of the seal ring groove 121.
Referring to fig. 2, a sealing groove 122 and a sliding groove 123 communicating with the sealing groove 122 are provided on an end surface of the cover plate 12 far from the base 11, the sliding groove 123 penetrates the cover plate 12 and communicates with the electric cavity 13, and the pressing post 2 is slidably provided in the sliding groove 123. One end of the pressing post 2 extends out of the housing 1, and the other end of the pressing post 2 extends into the electric cavity 13. The end of the pressing column 2 outside the shell 1 is sleeved on the sealing sleeve 15, the end of the sealing sleeve 15 is inserted in the sealing groove 122 and fixedly connected with the bottom of the sealing groove 122, and the sealing sleeve 15 shields the opening of the sliding groove 123 far away from the electric cavity 13.
Referring to fig. 1 and 2, a lever 124 is provided on the cover 12, one end of the lever 124 is hinged on the cover 12, a roller 125 is rotatably provided on the other end of the lever 124, the end of the sealing sleeve 15 abuts against the lever 124, and the abutting point of the sealing sleeve 15 and the lever 124 is located between the hinge point of the lever 124 and the roller 125. By pressing the roller 125 in a direction approaching the cover plate 12, the lever 124 swings and pushes the sealing sleeve 15 to deform, so as to drive the pressing column 2 to move, and at this time, the moving direction of the pressing column 2 is a pressing direction.
Referring to fig. 2, the base 11 is integrally injection molded, and the common terminal 131, the middle terminal 132, and the side terminal 133 are all adhered to the base 11 when the base 11 is integrally molded, and one end of each of the common terminal 131, the middle terminal 132, and the side terminal 133 extends into the electric cavity 13, and the other end extends out of the base 11. The middle terminal 132 is located between the common terminal 131 and the side terminal 133, the middle terminal 132 and the side terminal 133 are each fixed with an extension terminal 134, the extension terminal 134 of the middle terminal 132 is fixed with a normally closed contact 135, and the extension terminal 134 of the side terminal 133 is fixed with a normally open contact 136.
Referring to fig. 3, the contact sheet 3 is made of conductive metal, one end of the contact sheet 3 abuts against the common terminal 131, the other end of the contact sheet 3 is fixed with the movable contact 33, the normally-closed contact 135 and the normally-open contact 136 are both located on a moving path of the movable contact 33, and the normally-open contact 136 and the normally-closed contact 135 are arranged in a pressing-down direction. The contact piece 3 is penetrated with a relief groove 31, and the relief groove 31 is used for the end parts of the elastic piece 5 and the driving piece 4 to extend in. The groove wall of the abdication groove 31, which is close to the movable contact 33, is provided with a connecting block 32, and the connecting block 32 is integrally formed on the contact piece 3.
Referring to fig. 2 and 3, the end portion of the contact piece 3 abutting against the common terminal 131 is located between the bracket 6 and the common terminal 131, the bracket 6 abuts against the contact piece 3, and the bracket 6 and the contact piece 3 are fixed to the base 11 by caulking. The end part of the bracket 6 far away from the riveting end is integrally formed with a rotating bulge 61, a through hole 62 extending along the pressing direction is penetrated through the bracket 6, and the through hole 62 is used for the end part of the pressing column 2 to extend into and slide.
Referring to fig. 3, the driving piece 4 includes a coupling hook 41, a coupling bar 42, and two pre-tightening blocks 43, wherein the coupling hook 41 is integrally formed at one end of the coupling bar 42 along the length direction thereof, and the two pre-tightening blocks 43 are integrally formed at the other end of the coupling bar 42 along the length direction thereof. The connecting hook 41 is hooked on the rotating protrusion 61 and can rotate on the rotating protrusion 61, and one end of the connecting bar 42, which is far away from the connecting hook 41, extends into the through hole 62 and abuts against the pressing post 2.
Referring to fig. 1, the elastic piece 5 is used for driving the interference piece and the driving piece 4 to reset, and the elastic piece 5 includes a front piece 51, a convex arc piece 52, and a rear piece 53, where the convex arc piece 52 protrudes along the pressing direction. The front piece 51 and the rear piece 53 are all inclined, the inclination directions of the front piece 51 and the rear piece 53 are opposite, and the front piece 51 and the rear piece 53 are respectively integrally formed at both ends of the convex arc piece 52. The front piece 51 stretches into the abdication groove 31, the front piece 51 is propped against the groove wall of the abdication groove 31, the front piece 51 is penetrated with a connecting hole 511, and the connecting block 32 is inserted into the connecting hole 511. The end face of the rear piece 53 far away from the convex arc piece 52 is provided with a pre-tightening groove 531, the end parts of the two pre-tightening blocks 43 are inserted into the pre-tightening groove 531, and the end parts of the pre-tightening blocks 43 are abutted against the groove wall of the pre-tightening groove 531.
Referring to fig. 3, the pressing post 2 is configured to drive the end of the connecting bar 42 to drive the end of the contact piece 3 to swing until the movable contact 33 abuts against the normally open contact 136, and when the pressing post 2 moves in the pressing direction, the pressing post 2 drives the end of the driving piece 4 to move. When the pressing column 2 is not pressed down in the pressing direction, that is, when the spring 5 and the contact piece 3 are not subjected to external force, the spring 5 and the contact piece 3 are in a natural state and the movable contact 33 is abutted against the normally closed contact 135.
The implementation principle of the embodiment 1 of the application is as follows: when the pressing column 2 is not stressed, as the convex arc piece 52 protrudes along the pressing direction, and the front piece 51 is obliquely arranged and is propped against the groove wall of the yielding groove 31, the front piece 51 applies a force towards the pressing direction to the contact piece 3, so that the contact piece 3 applies a force towards the pressing direction to the movable contact 33, the movable contact 33 is propped against the normally closed contact 135, and the common terminal 131 is communicated with the middle terminal 132.
When the circuit is switched, the roller 125 is pressed, the lever 124 is driven by the roller 125 to swing, the lever 124 is propped against the sealing sleeve 15 and deforms the sealing sleeve 15, and the sealing sleeve 15 transmits force to the pressing column 2 and drives the pressing column 2 to move along the pressing direction. The pressing column 2 is pressed against the end part of the connecting strip 42 far away from the connecting hook 41, the end part of the connecting strip 42 far away from the connecting hook 41 rotates and drives the pre-tightening block 43 to rotate, so that the rear piece 53 moves in the direction close to the front piece 51 and in the direction far away from the cover plate 12, the protruding radian of the protruding arc piece 52 is increased, and the compression amount of the elastic piece 5 is increased. Until the elastic sheet 5 deforms and swings to the end of the contact sheet 3 provided with the movable contact 33, at this time, the stored energy of the elastic sheet 5 is released to drive the end of the contact sheet 3 provided with the movable contact 33 to swing to abut against the movable contact 33 and the normally open contact 136. After the force applied to the pressing post 2 is removed, the contact piece 3 is reset to the movable contact 33 to abut against the normally closed contact 135 by the spring piece 5 and the contact piece 3.
With the above configuration, when the pressing column 2 is pressed down, the normally open contact 136 facing away from the pressing direction can abut against the movable contact 33, and when no force is applied to the pressing column 2, the normally closed contact 135 facing toward the pressing direction abuts against the movable contact 33. Under the condition that the wiring modes of the middle terminal 132 and the side terminal 133 are not changed, the micro switch provided by the application realizes different circuit connection modes, and the application range of the micro switch is enlarged.
Example 2:
referring to fig. 2, the difference between this embodiment and embodiment 1 is that the two opposite groove walls of the yielding groove 31 are provided with a stopper 7, the stopper 7 includes a supporting block 71 fixed on the contact piece 3 and a limit stop 72 fixed on one side of the supporting block 71 near the bracket 6, and an end surface of the limit stop 72 facing away from the supporting block 71 is a limit surface 721. The two opposite back side walls of the connecting strip 42 are respectively fixed with a limiting rod 421, the two limiting rods 421 respectively abut against limiting surfaces 721 on different limiting stops 72, and the limiting surfaces 721 extend along the rotation direction of the limiting rods 421. When the pressing column 2 moves along the pressing direction until the pressing column cannot move continuously, namely the pressing column 2 reaches the maximum travel of moving along the pressing direction, at this time, the two limiting rods 421 are staggered with the adjacent limiting surfaces 721.
The implementation principle of the embodiment 2 of the application is as follows: when the roller 125 is pressed, the roller 125 drives the pressing column 2 to move along the pressing direction through the lever 124, and the pressing column 2 pushes the connecting bar 42 to rotate away from the end of the connecting hook 41, so as to drive the limiting rod 421 to rotate. Along with the gradual movement of the pressing column 2 along the pressing direction, the limiting rod 421 slides on the limiting surface 721, the elastic sheet 5 is gradually compressed, the limiting rod 421 and the limiting block 7 limit the contact piece 3 to swing under the action of the elastic sheet 5 until the pressing column 2 moves along the pressing direction to reach the maximum stroke, the elastic sheet 5 reaches the maximum deformation degree under the action of the pressing column 2 and the driving piece 4, namely, the energy storage of the elastic sheet 5 reaches the maximum, the limiting rod 421 is staggered with the limiting surface 721, so that the energy storage of the elastic sheet 5 is instantly released, the contact piece 3 is driven to swing rapidly, the movable contact 33 is rapidly separated from the normally-closed contact 135 and is rapidly contacted with the normally-open contact 136, and the rapid on-off effect is realized.
The above embodiments are not intended to limit the scope of the present application, so: all equivalent changes in structure, shape and principle of the application should be covered in the scope of protection of the application.
Claims (4)
1. The utility model provides a dustproof passenger train micro-gap switch, includes casing (1) and slides and set up press post (2) on casing (1), electric cavity (13) have been seted up on casing (1), be provided with public terminal (131), well terminal (132) and limit terminal (133) in electric cavity (13), well terminal (132) are located between public terminal (131) and limit terminal (133), just press the tip of post (2) to stretch into in electric cavity (13), its characterized in that:
The electric power device comprises a contact piece (3), a driving piece (4) and an elastic piece (5), wherein one end of the contact piece (3) is connected to a common terminal (131), a movable contact (33) is arranged at the other end of the contact piece (3), a normally open contact (136) is arranged on a side terminal (133), a normally closed contact (135) is arranged on a middle terminal (132), the normally open contact (136) and the normally closed contact (135) are both positioned on a moving path of the movable contact (33), one end of the driving piece (4) is rotatably arranged in an electric cavity (13), the other end of the driving piece (4) is abutted against the end of a pressing column (2), and two ends of the elastic piece (5) are respectively abutted against the driving piece (4) and the contact piece (3), and the elastic piece (5) is used for driving the contact piece (3) to reset;
When the elastic sheet (5) and the contact sheet (3) are both in a natural state, the movable contact (33) is abutted against the normally closed contact (135), the pressing column (2) is used for driving the end part of the driving sheet (4) to drive the end part of the contact sheet (3) to swing until the movable contact (33) is abutted against the normally open contact (136), the direction of the pressing column (2) when the pressing column moves and drives the end part of the driving sheet (4) to move is a pressing direction, and the normally open contact (136) and the normally closed contact (135) are sequentially arranged along the pressing direction;
The elastic sheet (5) comprises a convex arc sheet (52), a front sheet (51) abutted against the contact sheet (3) and a rear sheet (53) abutted against the driving sheet (4), the convex arc sheet (52) is protruded along the downward pressing direction, and the front sheet (51) and the rear sheet (53) are respectively connected to two ends of the convex arc sheet (52);
The electric cavity (13) is internally provided with a support (6), the support (6) is provided with a rotating bulge (61), the driving piece (4) comprises a connecting strip (42), a connecting hook (41) connected with one end of the connecting strip (42) and a pre-tightening block (43) connected with one side, far away from the pressing column (2), of the connecting hook (41), the connecting hook (41) is hooked on the rotating bulge (61), the end face, far away from the convex arc piece (52), of the rear piece (53) is provided with a pre-tightening groove (531), the end part of the pre-tightening block (43) stretches into the pre-tightening groove (531), and the end part of the pre-tightening block (43) is in contact with the groove wall of the pre-tightening groove (531);
The shell (1) comprises a base (11) and a cover plate (12), the electric cavity (13) is formed by encircling the base (11) and the cover plate (12), a sealing ring (14) is arranged between the base (11) and the cover plate (12), and the base (11) and the cover plate (12) are in contact with the sealing ring (14);
The cover plate (12) is provided with a sliding groove (123) communicated with the electric cavity (13), the pressing column (2) is arranged in the sliding groove (123) in a sliding way, one end of the pressing column (2) extends out of the shell (1), the end part of the pressing column (2) outside the shell (1) is sleeved with a sealing sleeve (15), the sealing sleeve (15) is fixed on the cover plate (12), and the sealing sleeve (15) shields an opening of the sliding groove (123) far away from the electric cavity (13);
Be provided with stopper (7) on contact piece (3), be provided with gag lever post (421) on the lateral wall of connecting strip (42), be provided with on stopper (7) be used for with the spacing face (721) of contradicting, spacing face (721) extend along the direction of rotation of gag lever post (421), when pressing post (2) and moving along the push-down direction and reaching maximum stroke, gag lever post (421) stagger with spacing face (721).
2. The dust protected passenger car micro-switch of claim 1, wherein: the contact piece (3) is provided with a connecting block (32), and the elastic piece (5) is provided with a connecting hole (511) for inserting the connecting block (32).
3. The dust protected passenger car micro-switch of claim 1, wherein: the end face of the cover plate (12) facing the base (11) is provided with a sealing ring groove (121), and the end part of the sealing ring (14) is inserted into the sealing ring groove (121).
4. The dust protected passenger car micro-switch of claim 1, wherein: the base (11) is integrally injection molded, and the common terminal (131), the middle terminal (132) and the side terminals (133) are adhered to the base (11) when the base (11) is integrally molded.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210643423.XA CN114927363B (en) | 2022-06-09 | 2022-06-09 | Dustproof passenger train micro-gap switch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210643423.XA CN114927363B (en) | 2022-06-09 | 2022-06-09 | Dustproof passenger train micro-gap switch |
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| Publication Number | Publication Date |
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| CN114927363A CN114927363A (en) | 2022-08-19 |
| CN114927363B true CN114927363B (en) | 2024-04-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210643423.XA Active CN114927363B (en) | 2022-06-09 | 2022-06-09 | Dustproof passenger train micro-gap switch |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117877900B (en) * | 2024-02-01 | 2024-07-09 | 浙江中讯电子有限公司 | Micro-switch |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1029592A (en) * | 1961-06-15 | 1966-05-18 | Otehall Ltd | Improvements in or relating to snap-action electric switches |
| CN208298735U (en) * | 2018-06-13 | 2018-12-28 | 厦门博岱电子科技有限公司 | The microswitch of door roller |
| CN109411276A (en) * | 2018-11-29 | 2019-03-01 | 深圳市德威控制系统有限公司 | A kind of microswitch |
| CN209607640U (en) * | 2019-04-09 | 2019-11-08 | 浙江佳奔电子有限公司 | A kind of high voltage direct current microswitch with brake function with arc extinguishing structure |
-
2022
- 2022-06-09 CN CN202210643423.XA patent/CN114927363B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1029592A (en) * | 1961-06-15 | 1966-05-18 | Otehall Ltd | Improvements in or relating to snap-action electric switches |
| CN208298735U (en) * | 2018-06-13 | 2018-12-28 | 厦门博岱电子科技有限公司 | The microswitch of door roller |
| CN109411276A (en) * | 2018-11-29 | 2019-03-01 | 深圳市德威控制系统有限公司 | A kind of microswitch |
| CN209607640U (en) * | 2019-04-09 | 2019-11-08 | 浙江佳奔电子有限公司 | A kind of high voltage direct current microswitch with brake function with arc extinguishing structure |
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|---|---|
| CN114927363A (en) | 2022-08-19 |
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