CN212161654U - Contact mechanism and microswitch - Google Patents
Contact mechanism and microswitch Download PDFInfo
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- CN212161654U CN212161654U CN202021029654.4U CN202021029654U CN212161654U CN 212161654 U CN212161654 U CN 212161654U CN 202021029654 U CN202021029654 U CN 202021029654U CN 212161654 U CN212161654 U CN 212161654U
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Abstract
The embodiment of the utility model provides a low-voltage apparatus switch, in particular to contact mechanism and micro-gap switch, contact mechanism includes: including, decide contact subassembly, movable contact subassembly, decide the contact subassembly and include: first and second fixed contacts respectively welded on the first and second contact plates; the movable contact subassembly includes: the contact bridge, weld the first, second movable contact on the contact bridge; the first and second movable contacts are respectively opposite to the first and second fixed contacts; the first and second fixed contacts are provided with a first and second V-shaped grooves at the sides opposite to the first and second moving contacts respectively, and the first and second moving contacts are provided with a first and second arc surfaces at the sides opposite to the first and second fixed contacts respectively; when the movable contact assembly moves to a preset position relative to the fixed contact assembly, the first arc surface and the second arc surface are respectively abutted against the groove walls on the two sides of the first V-shaped groove and the second V-shaped groove. Compared with the prior art, the micro-gap switch can effectively avoid the phenomenon that the movable contact and the fixed contact are separated, and improves the reliability of the micro-gap switch.
Description
Technical Field
The embodiment of the utility model provides a low-voltage apparatus switch is related to, in particular to contact mechanism and micro-gap switch.
Background
The microswitch is a switch with very small force, in which external mechanical force acts on an action reed through a transmission element to quickly connect or disconnect a fixed contact and a movable contact at the tail end of the microswitch. When the micro switch is used, the movable contact and the fixed contact of the switch are often separated for a short time due to a high-frequency vibration environment, so that the phenomenon of unreliable contact between the movable contact and the fixed contact of the switch is caused. Meanwhile, no matter the movable contact or the fixed contact is fixed by adopting a riveting mode at present, and a plating layer on the contact is easy to damage in the riveting process, so that the switch is abraded in the working process, and further, generated dust is generated, and meanwhile, the surface of the contact is easy to oxidize, so that the contact of the contact is unreliable.
SUMMERY OF THE UTILITY MODEL
An embodiment of the utility model aims to provide a contact mechanism and micro-gap switch can effectively avoid micro-gap switch to cause the movable contact of switch and decide the contact to appear the short-term unhooked phenomenon because of the high-frequency vibration environment to make cladding material on first movable contact and the second movable contact can not destroyed, thereby improved micro-gap switch's reliability.
In order to achieve the above object, an embodiment of the present invention provides a contact mechanism, including a fixed contact assembly, a movable contact assembly moving relative to the fixed contact assembly, the fixed contact assembly including: the touch screen comprises a first contact plate, a second contact plate, a first fixed contact welded on the first contact plate and a second fixed contact welded on the second contact plate;
the movable contact assembly includes: the contact bridge, weld first movable contact and second movable contact on the said contact bridge;
the first movable contact and the first fixed contact are opposite to each other, and the second movable contact and the second fixed contact are opposite to each other; one side of the first fixed contact, which is opposite to the first moving contact, is provided with a first V-shaped groove, one side of the second fixed contact, which is opposite to the second moving contact, is provided with a second V-shaped groove, one side of the first moving contact, which is opposite to the first fixed contact, is provided with a first arc surface, and one side of the second moving contact, which is opposite to the second fixed contact, is provided with a second arc surface;
when the movable contact assembly moves to a preset position relative to the fixed contact assembly, the first arc surface of the first movable contact abuts against the two side groove walls of the first V-shaped groove of the first fixed contact, and the second arc surface of the second movable contact abuts against the two side groove walls of the second V-shaped groove of the second fixed contact.
Additionally, the utility model discloses an embodiment has still designed a micro-gap switch, include: the contact mechanism comprises a contact bracket, two contact mechanisms and a push rod assembly;
the contact holder includes: the movable contact assembly of one of the contact mechanisms is fixedly arranged on the first mounting side, and the movable contact assembly of the other contact mechanism is fixedly arranged on the second mounting side;
and the push rod component is used for driving the contact support to move between the fixed contact component of one contact mechanism and the fixed contact component of the other contact mechanism along the direction opposite to the first mounting side and the second mounting side.
Compared with the prior art, because the first fixed contact of the contact mechanism is provided with the first V-shaped groove at one side relative to the first movable contact, the second fixed contact is provided with the second V-shaped groove at one side relative to the second movable contact, simultaneously, one side of the first movable contact relative to the first fixed contact is the first arc surface, and one side of the second movable contact relative to the second fixed contact is the second arc surface, when the movable contact component moves to the preset position relative to the fixed contact component, the first arc surface of the first movable contact and the second arc surface of the second movable contact can respectively abut against the two side groove walls of the first V-shaped groove and the two side groove walls of the second V-shaped groove, the first movable contact and the second movable contact can be automatically guided through the first V-shaped groove and the second V-shaped groove, the first movable contact and the second movable contact can be effectively positioned, and the phenomenon that the movable contact and the fixed contact are separated in short time due to the high-frequency vibration environment of the microswitch is avoided, thereby improving the reliability of the microswitch. Meanwhile, the first fixed contact and the second fixed contact are respectively welded on the first contact plate and the second contact plate, and the first movable contact and the second movable contact are respectively welded on the contact bridge, so that the coatings on the first fixed contact, the second fixed contact, the first movable contact and the second movable contact cannot be damaged, and the reliability of the movable contact and the fixed contacts in contact is further improved.
Further, gold plating layers are arranged on the two side groove walls of the first V-shaped groove, the two side groove walls of the second V-shaped groove, the first arc surface and the second arc surface.
Furthermore, the groove walls on the two sides of the first V-shaped groove and the groove walls on the two sides of the second V-shaped groove are both convex cambered surfaces.
Furthermore, the contact bridges of the two contact assemblies are detachably connected with the contact support.
Furthermore, the first mounting side is provided with a first clamping piece for clamping the contact bridge of one of the movable contact assemblies; the second mounting side is provided with a second clamping piece for clamping the contact bridge of the other movable contact assembly.
Furthermore, the first clamping piece and the second clamping piece protrude out of the contact support, a first clamping groove is formed in the first clamping piece, the contact bridge of one of the movable contact assemblies is clamped into the first clamping groove, and a second clamping groove is formed in the second clamping piece, the second clamping groove can be formed in the second clamping piece, and the contact bridge of the other movable contact assembly is clamped into the second clamping groove.
Further, in any of the movable contact assemblies, the contact bridge includes: the first movable contact is arranged on one side of one bearing part, which is far away from the contact support, and the second movable contact is arranged on one side of the other bearing part, which is far away from the contact support;
the bending directions of the two bending parts are the same, the plate body of one of the movable contact assemblies is embedded into a first clamping groove of a first clamping piece, and the plate body of the other movable contact assembly is embedded into a second clamping groove of a second clamping piece.
Furthermore, the two bearing parts of the contact bridge clamped on the first clamping piece are exposed outside the first clamping groove and are separated from the first mounting side; the two bearing parts of the contact bridge clamped on the second clamping piece are exposed outside the second clamping groove and are separated from the second mounting side.
Furthermore, a clamping groove for clamping the first clamping piece is formed between the two bending parts of one of the contact bridges; and the other two bending parts of the contact bridge are also clamped with a clamping groove of the second clamping piece.
Drawings
Fig. 1 is an exploded schematic view of a contact mechanism according to a first embodiment of the present invention;
fig. 2 is an assembly view of a micro-gap switch according to a second embodiment of the present invention;
fig. 3 is an exploded schematic view of a micro-switch according to a second embodiment of the present invention;
fig. 4 is a schematic structural diagram of a movable contact assembly in a microswitch according to a second embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the following will explain in detail each embodiment of the present invention with reference to the accompanying drawings. However, it will be appreciated by those of ordinary skill in the art that in various embodiments of the invention, numerous technical details are set forth in order to provide a better understanding of the present application. However, the technical solutions claimed in the claims of the present application can be implemented without these technical details and with various changes and modifications based on the following embodiments.
A first embodiment of the present invention relates to a contact mechanism, as shown in fig. 1, including a fixed contact assembly 1, and a movable contact assembly 2 that moves relative to the fixed contact assembly 1. Wherein, decide contact subassembly 1 includes: the first contact plate 11, the second contact plate 12, the first fixed contact 13 welded on the first contact plate 11, and the second fixed contact 14 welded on the second contact plate 12.
In addition, in the present embodiment, as shown in fig. 1, the movable contact assembly 2 includes: a contact bridge 21, a first movable contact 22 and a second movable contact 23 soldered to the contact bridge 21. And, the first movable contact 22 and the first fixed contact 13 are opposite to each other, and the second movable contact 23 and the second fixed contact 14 are opposite to each other. In addition, a side of the first fixed contact 13 opposite to the first movable contact 22 is provided with a first V-shaped groove 131, a side of the second fixed contact 14 opposite to the second movable contact 23 is provided with a second V-shaped groove 141, a side of the first movable contact 22 opposite to the first fixed contact 13 is provided with a first arc surface 221, and a side of the second movable contact 23 opposite to the second fixed contact 14 is provided with a second arc surface 231.
In practical application, as shown in fig. 1, when the movable contact assembly 2 moves to a preset position relative to the fixed contact assembly 1, the first arc surface 221 of the first movable contact 22 abuts against both side groove walls of the first V-shaped groove 131 of the first fixed contact 13, and the second arc surface 231 of the second movable contact 23 abuts against both side groove walls of the second V-shaped groove 141 of the second fixed contact 14.
It can be easily found from the above that, the first movable contact 22 and the second movable contact 23 can be automatically guided and aligned by the first V-shaped groove 131 and the second V-shaped groove 141, and the first movable contact 22 and the second movable contact 23 can be effectively positioned, so that the phenomenon that the movable contact and the fixed contact are separated for a short time due to a high-frequency vibration environment of the micro switch is avoided, and the reliability of the micro switch is improved. Meanwhile, since the first fixed contact 13 and the second fixed contact 14 are respectively welded on the first contact plate 11 and the second contact plate 12, and the first movable contact 22 and the second movable contact 23 are respectively welded on the contact bridge 21, the coatings on the first fixed contact 13, the second fixed contact 14, the first movable contact 22 and the second movable contact 23 are not damaged, thereby further improving the reliability of the movable contact and the fixed contact when in contact.
Specifically, in the present embodiment, as shown in fig. 1, gold plating layers are provided on both side wall surfaces of the first V-shaped groove 131, both side wall surfaces of the second V-shaped groove 141, the first arc surface 221, and the second arc surface 231, and the gold plating layers provided on both side wall surfaces of the first V-shaped groove 131, both side wall surfaces of the second V-shaped groove 141, the first arc surface 221, and the second arc surface 231 can reduce waste of the gold layer while ensuring reliable contact between the movable contact and the fixed contact, thereby reducing the production cost of the entire microswitch.
In addition, as shown in fig. 1, both groove walls of the first V-shaped groove 131 and both groove walls of the second V-shaped groove 141 are preferably convex arc surfaces. Therefore, the groove walls on the two sides of the first V-shaped groove 131 and the first arc surface 221 are in point contact, and the groove walls on the two sides of the second V-shaped groove 141 and the second arc surface 231 are in point contact, so that the reliability of the contact between the movable contact and the fixed contact is further improved.
A second embodiment of the present invention relates to a micro switch, as shown in fig. 2 and 3, including: a contact holder 3, two contact mechanisms as described in the first embodiment, a push rod assembly 4.
Wherein, as shown in fig. 3, the contact point holder 3 includes: a first mounting side 31, a second mounting side 32 opposite to the first mounting side 31, and the moving contact assembly 2 of one of the contact mechanisms is fixed on the first mounting side 31, and the moving contact assembly 2 of the other contact mechanism is fixed on the second mounting side 32. Meanwhile, along the direction opposite to the first installation side 31 and the second installation side 32, the push rod assembly 4 is used for driving the contact support 3 to move between the fixed contact assembly 1 of one contact mechanism and the fixed contact assembly 1 of the other contact mechanism, so that the electric contact between the movable contact and the fixed contact of one contact mechanism and the electric contact between the movable contact and the fixed contact of the other contact mechanism are realized.
In addition, in practical application, as shown in fig. 2, the first movable contact 22 and the second movable contact 23 of one of the contact mechanisms can be electrically abutted against the first fixed contact 13 and the second fixed contact 14 respectively to serve as an electrically conductive state of the micro switch, and it can be seen from the above that, since the micro switch of the present embodiment is the contact mechanism of the first embodiment, the first movable contact 22 and the second movable contact 23 can be automatically aligned through the first V-shaped groove 131 of the first fixed contact 13 and the second V-shaped groove 141 of the second fixed contact 14, and the first movable contact 22 and the second movable contact 23 can be effectively positioned, so that the phenomenon that the movable contact and the fixed contact are separated from each other in a short time due to a high-frequency vibration environment of the micro switch is avoided, and the reliability of the micro switch is improved.
Also, it is worth mentioning that, as shown in fig. 3, the contact bridges 21 of the movable contact assemblies 2 of both contact mechanisms are detachably connected to the contact holder 3. In particular, the first mounting side 31 of the contact carrier 3 has a first snap-in piece 33 which snaps into the contact bridge 21 of one of the movable contact assemblies 2, and the second mounting side 32 has a second snap-in piece 34 which snaps into the contact bridge 21 of the other movable contact assembly 2.
It should be noted that, in the present embodiment, as shown in fig. 3, the first locking member 33 and the second locking member 34 both protrude from the contact holder 3, and the first locking member 33 is provided with a first locking groove 331 that is locked by the contact bridge 21 of one of the movable contact assemblies 2, and the second locking member 34 is provided with a second locking groove 341 that is locked by the contact bridge 21 of the other movable contact assembly 2.
In any of the movable contact assemblies 2, as shown in fig. 4, the contact bridge 21 includes: the plate body 211, two bending portions 212 that are bent and extended from both ends of the plate body 211 in a direction away from the plate body 211, and two bearing portions 213 that are horizontally extended from the two bending portions 212 in a direction away from the plate body 211. While the respective first movable contact 22 is arranged on the side of one of the carrier parts 213 facing away from the contact carrier 3 and the second movable contact 23 is arranged on the side of the other carrier part 213 facing away from the contact carrier 3. The bending directions of the two bending portions 212 are the same, and the plate body 211 of one of the movable contact assemblies 2 is embedded in the first slot 331 of the first clamping piece 33, and the plate body 211 of the other movable contact assembly 2 is embedded in the second slot 341 of the second clamping piece 34.
Also, as a preferable mode, in the present embodiment, as shown in fig. 2 and 3, the two bearing portions 213 of the contact bridge 21 snapped on the first snap member 33 are exposed outside the first snap groove 331 and spaced apart from the first mounting side 31. And the two bearing parts 213 of the contact bridge 21 clamped on the second clamping piece 34 are exposed outside the second clamping groove 341 and are separated from the second mounting side 32, so that both carrier parts 213 can form a gap with the contact carrier 3, so that during a switching action, the gap formed between the two bearing parts 213 and the contact holder 3 can be utilized, so that the first movable contact 22 and the second movable contact 23 can be electrically contacted with the first fixed contact 13 and the second fixed contact 14, the gap formed between the two bearing parts 213 and the contact point bracket 3 can be used for avoiding a certain degree, thereby ensuring that the first movable contact 22 and the second movable contact 23 can be automatically guided into the first V-shaped groove 131 of the first fixed contact 13 and the second V-shaped groove 141 of the second fixed contact 14, respectively, and realizing automatic guiding of the first movable contact 22 and the second movable contact 23.
It will be understood by those skilled in the art that the foregoing embodiments are specific examples of the invention, and that various changes in form and details may be made therein without departing from the spirit and scope of the invention in its practical application.
Claims (10)
1. A contact mechanism comprising a fixed contact assembly, a movable contact assembly movable relative to the fixed contact assembly, the fixed contact assembly comprising: the touch screen comprises a first contact plate, a second contact plate, a first fixed contact welded on the first contact plate and a second fixed contact welded on the second contact plate;
the movable contact assembly includes: the contact bridge, weld first movable contact and second movable contact on the said contact bridge;
the first movable contact and the first fixed contact are opposite to each other, and the second movable contact and the second fixed contact are opposite to each other; one side of the first fixed contact, which is opposite to the first moving contact, is provided with a first V-shaped groove, one side of the second fixed contact, which is opposite to the second moving contact, is provided with a second V-shaped groove, one side of the first moving contact, which is opposite to the first fixed contact, is provided with a first arc surface, and one side of the second moving contact, which is opposite to the second fixed contact, is provided with a second arc surface;
when the movable contact assembly moves to a preset position relative to the fixed contact assembly, the first arc surface of the first movable contact abuts against the two side groove walls of the first V-shaped groove of the first fixed contact, and the second arc surface of the second movable contact abuts against the two side groove walls of the second V-shaped groove of the second fixed contact.
2. The contact mechanism according to claim 1, wherein gold plating is provided on both side walls of the first V-shaped groove, both side walls of the second V-shaped groove, the first arc surface, and the second arc surface.
3. The contact mechanism according to claim 1 or 2, wherein both side groove walls of the first V-shaped groove and both side groove walls of the second V-shaped groove are convex arc surfaces.
4. A micro-switch, comprising: a contact holder, two contact mechanisms according to any one of claims 1 to 3, a push rod assembly;
the contact holder includes: the movable contact assembly of one of the contact mechanisms is fixedly arranged on the first mounting side, and the movable contact assembly of the other contact mechanism is fixedly arranged on the second mounting side;
and the push rod component is used for driving the contact support to move between the fixed contact component of one contact mechanism and the fixed contact component of the other contact mechanism along the direction opposite to the first mounting side and the second mounting side.
5. The microswitch of claim 4, wherein the contact bridges of both of the movable contact assemblies are removably connected with the contact brackets.
6. The microswitch of claim 5, wherein the first mounting side has a first snap-in member that snaps into the contact bridge of one of the movable contact assemblies;
the second mounting side is provided with a second clamping piece for clamping the contact bridge of the other movable contact assembly.
7. The micro-switch of claim 6, wherein the first and second snap-in members each protrude from the contact holder, the first snap-in member having a first snap-in slot that is snapped into the contact bridge of one of the movable contact assemblies, and the second snap-in member having a second snap-in slot that is snapped into the contact bridge of the other movable contact assembly.
8. The microswitch of claim 7, wherein in any of the movable contact assemblies, the contact bridge comprises: the first movable contact is arranged on one side of one bearing part, which is far away from the contact support, and the second movable contact is arranged on one side of the other bearing part, which is far away from the contact support;
the bending directions of the two bending parts are the same, the plate body of one of the movable contact assemblies is embedded into a first clamping groove of a first clamping piece, and the plate body of the other movable contact assembly is embedded into a second clamping groove of a second clamping piece.
9. The microswitch of claim 8, wherein two of said bearing portions of said contact bridge snapped onto said first snap-in member are exposed outside of said first snap-in slot and spaced apart from said first mounting side;
the two bearing parts of the contact bridge clamped on the second clamping piece are exposed outside the second clamping groove and are separated from the second mounting side.
10. The microswitch of claim 9, wherein a clamping groove for clamping the first clamping piece is further formed between the two bent parts of one of the contact bridges;
and the other two bending parts of the contact bridge are also clamped with a clamping groove of the second clamping piece.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021029654.4U CN212161654U (en) | 2020-06-08 | 2020-06-08 | Contact mechanism and microswitch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021029654.4U CN212161654U (en) | 2020-06-08 | 2020-06-08 | Contact mechanism and microswitch |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212161654U true CN212161654U (en) | 2020-12-15 |
Family
ID=73703329
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021029654.4U Active CN212161654U (en) | 2020-06-08 | 2020-06-08 | Contact mechanism and microswitch |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212161654U (en) |
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2020
- 2020-06-08 CN CN202021029654.4U patent/CN212161654U/en active Active
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