CN213660244U - Contact device of electric appliance - Google Patents
Contact device of electric appliance Download PDFInfo
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- CN213660244U CN213660244U CN202022688995.9U CN202022688995U CN213660244U CN 213660244 U CN213660244 U CN 213660244U CN 202022688995 U CN202022688995 U CN 202022688995U CN 213660244 U CN213660244 U CN 213660244U
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- contact
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- resistance
- contacts
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Abstract
The utility model discloses an electrical contact device, which comprises a movable contact component and a static contact component, wherein the movable contact component and the static contact component are connected with each other through a spring, the two sides of the static contact component are respectively and fixedly connected with a connecting terminal, the top of the static contact component is symmetrically provided with two high-resistance static contacts and two static contacts, the bottom of the movable contact component is symmetrically provided with two high-resistance moving contacts and two moving contacts, the device mainly adopts the current-limiting principle, the contact surface adopts an arc structure, the contact surface of the contact is maximized, the contact resistance of the contact is minimized, the condition that the contact surface of the contact generates low high temperature is eliminated, the high-resistance contact of the electrical contact firstly switches on the circuit when switching on the circuit, and then switches off the circuit when switching off the circuit, thereby playing the role of current limiting, preventing the circuit from generating impact current when switching on and switching off, protecting, the function of stabilizing the circuit voltage is achieved.
Description
Technical Field
The utility model belongs to the technical field of ac contactor, especially, relate to an electrical apparatus contact device.
Background
The existing general electrical appliance contact can generate large impact current at the moment when a circuit is just switched on and switched off, damage is caused to the contact, the service life of the electrical appliance contact is shortened, high temperature can be generated by the excessive current, the mechanical strength of the contact can be reduced by the high temperature of the electrical appliance contact, the contact force of the contact is reduced, the condition of poor contact is generated, and the loss of electric energy is increased.
The electrical contact device enables the high-resistance contact of the movable contact to be firstly connected with a circuit and then connected with the circuit through the thrust of the button head, the high-resistance contact plays a role in limiting current when the circuit is connected and disconnected, the instant overlarge impact current when the circuit is connected is prevented, the contact ensures that the normal working current of the circuit passes through when the circuit is connected, and the technical problem that the contact is damaged due to overlarge current when the circuit is started and disconnected is solved. The contact surface of the high-resistance contact and the contact is of an arc structure, so that the contact surface of the movable contact and the static contact is the largest, and the contact resistance is reduced to prevent the contact from generating high temperature.
Disclosure of Invention
An object of the utility model is to provide an electrical apparatus contact device to solve the problem of mentioning in the above-mentioned background art.
The utility model provides an electrical apparatus contact device, includes movable contact subassembly and static contact subassembly, through spring interconnect between movable contact subassembly and the static contact subassembly, the both sides of static contact subassembly rigid coupling respectively have binding post, and two high resistance static contacts and two static contacts are installed to the top symmetry of static contact subassembly, and two high resistance moving contacts and two moving contacts are installed to the bottom symmetry of movable contact subassembly.
Preferably, the tops of the two high-resistance static contacts and the tops of the two static contacts are both arranged in a concave arc surface structure.
Preferably, the bottoms of the two high-resistance moving contacts and the bottoms of the two moving contacts are both provided with convex arc surface structures.
Preferably, the static distance between the fixed contact and the moving contact is greater than the static distance between the high-resistance fixed contact and the high-resistance moving contact.
Preferably, a button head is further fixedly arranged at the center of the top of the movable contact assembly.
Compared with the prior art, the utility model discloses following beneficial effect has: the electric appliance contact device mainly adopts the current-limiting principle, the contact surface adopts the arc structure, the contact surface of the contact is enabled to be in the maximization, the contact resistance of the contact is minimum, the condition that the contact surface of the contact generates high temperature for a short time is eliminated, the high-resistance contact of the electric appliance contact is firstly switched on the circuit when the circuit is switched on, the circuit is switched off after the circuit is switched off, the current-limiting effect is realized, the circuit is prevented from being switched on, impact current is generated during the switching off, the electric appliance contact is protected, the interference wave generated by the circuit is eliminated, and the effect of stabilizing the circuit voltage is realized.
Drawings
The accompanying drawings are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention, and together with the description, do not constitute a limitation of the invention, in which:
fig. 1 is a schematic view of the overall structure of the present invention.
In the figure: 1. a wiring terminal; 2. a stationary contact assembly; 3. a high-resistance static contact; 4. a high resistance static contact concave arc surface; 5. a moving contact assembly; 6. a high-resistance moving contact; 7. a high-resistance static contact convex arc surface; 8. static contact; 9. a concave cambered surface of a static contact; 10. a moving contact convex arc surface; 11. a moving contact; 12. a button head; 13. a spring.
Detailed Description
The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, rather than all embodiments, and all other embodiments obtained by a person of ordinary skill in the art without creative work belong to the protection scope of the present invention based on the embodiments of the present invention.
A contact device of an electric appliance comprises a movable contact component 5 and a fixed contact component 2, wherein the movable contact component 5 and the fixed contact component 2 are connected with each other through a spring 13, two sides of the fixed contact component 2 are respectively and fixedly connected with a connecting terminal 1, the connecting terminal 1 is used for connecting an external circuit, two high-resistance fixed contacts 3 and two fixed contacts 8 are symmetrically installed at the top of the fixed contact component 2, two high-resistance movable contacts 6 and two movable contacts 11 are symmetrically installed at the bottom of the movable contact component 5, the static interval between the fixed contacts 8 and the movable contacts 11 is larger than the static interval between the high-resistance fixed contacts 3 and the high-resistance movable contacts 6, the tops of the two high-resistance fixed contacts 3 and the two fixed contacts 8 are both arranged in a concave arc surface structure, the bottoms of the two high-resistance movable contacts 6 and the bottoms of, the push mode of the button head 12 can be any one of manual operation, hydraulic pressure, pneumatic operation and electric operation; the button head 12 is pressed to push the moving contact component 5, the moving contact component 5 pushes the high-resistance moving contact 6, the convex arc surface 7 of the high-resistance moving contact is contacted with the concave arc surface 4 of the high-resistance static contact, the current of the circuit passes through one end of the wiring terminal 1 to reach the concave arc surface 4 of the high-resistance static contact, passes through the convex arc surface 7 of the high-resistance moving contact to reach the high-resistance moving contact 6, passes through the movable contact component 5 to reach the high-resistance moving contact 6 at the other end, passes through the convex arc surface 7 of the high-resistance moving contact to reach the concave arc surface 4 of the high-resistance static contact and passes through the static contact component 2 at the other end to reach the wiring terminal 1, the current firstly passes through; along with the continuation of thrust, make moving contact subassembly 5 promote moving contact 11, moving contact convex arc surface 10 contacts with static contact concave arc surface 9, the electric current passes through static contact subassembly 2 to static contact 8, through static contact concave arc surface 9 to moving contact convex arc surface 10, through moving contact 11 to moving contact subassembly 5, to the moving contact 11 of the other end, through moving contact convex arc surface 10 to static contact concave arc surface 9, through static contact 8 to the static contact subassembly 2 of the other end, because the moving contact does not have resistance and high resistance moving contact and static contact and constitute parallel structure, be equivalent to short circuit high resistance moving contact and static contact, the electric current flows to the load through moving contact circuit. When the circuit is disconnected, the moving contact and the static contact are disconnected firstly, and then the high-resistance moving contact and the static contact are disconnected, so that the high-resistance moving contact and the static contact limit impact current generated when the circuit is disconnected, interference signals are prevented, and stable work of the circuit is ensured.
Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications and variations can be made in the embodiments or in part of the technical features of the embodiments without departing from the spirit and the scope of the invention.
Claims (5)
1. An electrical apparatus contact device, including moving contact subassembly (5) and static contact subassembly (2), its characterized in that: the moving contact component (5) and the static contact component (2) are connected with each other through a spring (13), two sides of the static contact component (2) are fixedly connected with a wiring terminal (1) respectively, two high-resistance static contacts (3) and two static contacts (8) are symmetrically installed at the top of the static contact component (2), and two high-resistance moving contacts (6) and two moving contacts (11) are symmetrically installed at the bottom of the moving contact component (5).
2. The electrical contact device according to claim 1, wherein the tops of the two high-resistance fixed contacts (3) and the two fixed contacts (8) are both arranged in a concave arc structure.
3. The electrical contact device according to claim 2, wherein the two high-resistance moving contacts (6) and the two moving contacts (11) are arranged in a convex arc structure at the bottom.
4. The electrical contact device according to claim 1, wherein the static spacing between the stationary contact (8) and the movable contact (11) is greater than the static spacing between the high resistance stationary contact (3) and the high resistance movable contact (6).
5. Electrical appliance contact arrangement according to claim 1, characterized in that a button head (12) is also fixed at the top center of the moving contact assembly (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022688995.9U CN213660244U (en) | 2020-11-19 | 2020-11-19 | Contact device of electric appliance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022688995.9U CN213660244U (en) | 2020-11-19 | 2020-11-19 | Contact device of electric appliance |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213660244U true CN213660244U (en) | 2021-07-09 |
Family
ID=76685420
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022688995.9U Active CN213660244U (en) | 2020-11-19 | 2020-11-19 | Contact device of electric appliance |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213660244U (en) |
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2020
- 2020-11-19 CN CN202022688995.9U patent/CN213660244U/en active Active
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