Circuit breaker
By using a stable connection between metal conductive parts and conductive contacts in the circuit breaker, the problem of insufficient reliability of conductive rubber in the traditional circuit breaker is solved, the safety and stability of the equipment are improved, and the fire risk is reduced.
Patent Information
- Application Number
- CN202421138763.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-23
- Publication Date
- 2025-01-03
- Estimated Expiration
- 2034-05-23
AI Technical Summary
The conductive rubber of traditional circuit breakers is not very reliable and is prone to failure over time, reducing the conductive effect and increasing the risk of equipment fire.
The connection between metal conductive parts and conductive contacts is adopted, and the design of key caps ensures stable contact between metal conductive parts and conductive contacts, ensuring the reliability and stability of the circuit breaker.
It improves the stability and reliability of the circuit breaker, reduces the risk of fire in the equipment, and ensures effective protection of leakage current and overcurrent.
Smart Images
Figure CN222300580U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of switches, in particular to a circuit breaker. Background Art
[0002] At present, in order to protect the circuit from leakage current and overcurrent (overload and short circuit), circuit breakers are usually used to open and close the circuit and automatically cut off the fault circuit to protect the equipment and prevent fire risks. The key switch of the traditional circuit breaker connects the circuit on the circuit board through conductive rubber to open and close the circuit. However, the reliability of conductive rubber is not strong and it is easy to fail over time, which reduces the conductive effect, making it impossible to protect the equipment and increasing the fire risk of the equipment.
[0003] The above information disclosed in the Background section is only for enhancement of understanding of the background of the present disclosure and therefore it may include information that does not constitute the prior art that is already known to one of ordinary skill in the art. Summary of the invention
[0004] The utility model provides a circuit breaker, which can improve the stability and reliability of the circuit breaker, thereby reducing the risk of fire in equipment.
[0005] In a first aspect of the present disclosure, a circuit breaker is provided, the circuit breaker comprising:
[0006] The circuit breaker body comprises a first shell and a second shell connected to each other, wherein a circuit board is arranged in the first shell, the circuit board is provided with conductive contacts, and the second shell is provided with through holes corresponding to the conductive contacts;
[0007] A switch button comprises a keycap and a metal conductive part arranged in the keycap, wherein the keycap comprises a first keycap and a second keycap connected to each other, the diameter of the first keycap is larger than the diameter of the second keycap, the second keycap has a receiving cavity corresponding to the metal conductive part, and the metal conductive part is arranged in the receiving cavity. When the first shell and the second shell are closed, the second keycap passes through the through hole and is exposed on the end surface of the second shell. When the second keycap is pressed, the metal conductive part is electrically connected to the conductive contact.
[0008] In an exemplary embodiment of the present disclosure, a diameter of the second key cap is the same as a diameter of the through hole.
[0009] In an exemplary embodiment of the present disclosure, the metal conductive member and the conductive contact are made of copper.
[0010] In an exemplary embodiment of the present disclosure, a first protrusion is provided in the accommodating cavity, the first protrusion is provided with a groove, and the metal conductive member is provided with a second protrusion engaged with the groove.
[0011] In an exemplary embodiment of the present disclosure, the key cap is made of rubber.
[0012] In an exemplary embodiment of the present disclosure, the key cap is in a cylindrical shape.
[0013] In an exemplary embodiment of the present disclosure, the conductive contact includes two semicircular contacts that are oppositely disposed and spaced apart.
[0014] Beneficial effects:
[0015] In the switch button for circuit breaker provided in the public, it includes a keycap and a metal conductive part, the keycap includes a first keycap and a second keycap connected to each other, the diameter of the first keycap is larger than the diameter of the second keycap, when the first shell and the second shell are closed, the second keycap can be exposed to the end face of the second shell through the through hole of the second shell, and the first keycap is clamped between the first shell and the second shell, so as to fix the keycap to the circuit breaker body. In addition, the metal conductive part is located in the accommodating cavity in the second keycap, when the second keycap is pressed, the metal conductive part can be connected with the conductive contact in the circuit breaker body to cut off the fault circuit. Since the reliability of the metal conductive part is high, its conductivity will not be significantly affected over time, so the stability and reliability of the circuit breaker can be improved, thereby reducing the risk of fire in the equipment. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure or the conventional technology, the drawings required for use in the embodiments or the conventional technology descriptions will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present disclosure, and for ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.
[0017] Figure 1 It is a structural schematic diagram of a first shell according to an embodiment of the present disclosure.
[0018] Figure 2 It is a structural schematic diagram of a second shell according to an embodiment of the present disclosure.
[0019] Figure 3 It is a cross-sectional view of a key cap according to an embodiment of the present disclosure.
[0020] Description of reference numerals:
[0021] 110. First shell; 120. Second shell; 130. Circuit board; 140. Conductive contact; 150. Through hole; 160. Key cap; 170. Metal conductive part; 180. First key cap; 190. Second key cap. DETAILED DESCRIPTION
[0022] Example embodiments will now be described more fully with reference to the accompanying drawings. However, example embodiments can be implemented in a variety of forms and should not be construed as limited to the examples set forth herein; rather, these embodiments are provided so that the disclosure will be more comprehensive and complete and the concepts of the example embodiments are fully conveyed to those skilled in the art. The described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments. In the following description, many specific details are provided to provide a full understanding of the embodiments of the present disclosure.
[0023] The described features, structures or characteristics may be combined in one or more embodiments in any suitable manner. In the following description, many specific details are provided to provide a full understanding of the embodiments of the present disclosure. However, those skilled in the art will appreciate that the technical solutions of the present disclosure may be practiced without one or more of the specific details, or other methods, components, materials, etc. may be adopted. In other cases, known structures, materials or operations are not shown or described in detail to avoid blurring the main technical ideas of the present disclosure.
[0024] When a structure is “on” another structure, it may mean that the structure is integrally formed on the other structure, or that the structure is “directly” disposed on the other structure, or that the structure is “indirectly” disposed on the other structure via another structure.
[0025] The terms "a", "an", "the" are used to indicate the presence of one or more elements / components / etc.; the terms "including" and "having" are used to indicate an open-ended inclusive meaning and mean that there may be additional elements / components / etc. in addition to the listed elements / components / etc. The terms "first" and "second" etc. are used only as labels and are not intended to limit the quantity of their objects.
[0026] At present, in order to protect the circuit from leakage current and overcurrent (overload and short circuit), circuit breakers are usually used to open and close the circuit and automatically cut off the fault circuit to protect the equipment and prevent fire risks. The key switch of the traditional circuit breaker connects the circuit on the circuit board through conductive rubber to open and close the circuit. However, the reliability of conductive rubber is not strong and it is easy to fail over time, which reduces the conductive effect, making it impossible to protect the equipment and increasing the fire risk of the equipment.
[0027] In an embodiment of the present disclosure, a circuit breaker is provided, such as Figure 1-3As shown, the circuit breaker includes a circuit breaker body and a switch button. The circuit breaker body includes a first shell 110 and a second shell 120 connected to each other, a circuit board 130 is arranged in the first shell 110, the circuit board 130 is provided with a conductive contact 140, and the second shell 120 is provided with a through hole 150 corresponding to the conductive contact 140. The switch button includes a keycap 160 and a metal conductive part 170 arranged in the keycap 160, the keycap 160 includes a first keycap 180 and a second keycap 190 connected to each other, the diameter of the first keycap 180 is larger than the diameter of the second keycap 190, the second keycap 190 has a receiving cavity corresponding to the metal conductive part 170, and the metal conductive part 170 is arranged in the receiving cavity. When the first shell 110 and the second shell 120 are closed, the second keycap 190 passes through the through hole 150 and is exposed on the end surface of the second shell 120. When the second keycap 190 is pressed, the metal conductive part 170 is electrically connected to the conductive contact 140.
[0028] In the switch button for the circuit breaker provided in the present disclosure, a key cap 160 and a metal conductive member 170 are included. The key cap 160 includes a first key cap 180 and a second key cap 190 connected to each other. The diameter of the first key cap 180 is greater than the diameter of the second key cap 190. When the first housing 110 and the second housing 120 are closed, the second key cap 190 can be exposed to the end surface of the second housing 120 through the through hole 150 of the second housing 120, and the first key cap 180 is clamped between the first housing 110 and the second housing 120, so as to achieve the key cap 160 fixed to the circuit breaker body. In addition, the metal conductive member 170 is located in the accommodating cavity in the second key cap 190. When the second key cap 190 is pressed, the metal conductive member 170 can be connected to the conductive contact 140 in the circuit breaker body to cut off the fault circuit. Since the reliability of the metal conductive member 170 is high, its conductivity will not be significantly affected over time, so that the stability and reliability of the circuit breaker can be improved, thereby reducing the risk of fire in the equipment.
[0029] The following is a detailed description of the various components of the circuit breaker provided in the embodiment of the present disclosure in conjunction with the accompanying drawings:
[0030] In one embodiment of the present disclosure, the diameter of the second keycap 190 is the same as the diameter of the through hole 150, and the position of the second keycap 190 corresponds to the position of the through hole 150, so that the second keycap 190 can pass through the through hole 150 and be exposed on the end surface of the circuit breaker body, thereby facilitating the user to press.
[0031] Optionally, the metal conductive member 170 and the conductive contact 140 are made of copper. The electrical conductivity and thermal conductivity of pure copper are the best among all commercial metals, which can greatly improve the electrical conductivity and connection stability of the metal conductive member 170 and the conductive contact 140.
[0032] Optionally, a first protrusion is provided in the accommodating cavity, the first protrusion is provided with a groove, and the metal conductive member 170 is provided with a second protrusion engaged with the groove. Specifically, the second protrusion of the metal conductive member 170 can be inserted into the groove of the first protrusion in the accommodating cavity, thereby engaging with the first protrusion and fixing with the second keycap 190.
[0033] Optionally, the material of the keycap 160 is rubber, that is, the material of the first keycap 180 and the second keycap 190 is rubber. Since rubber has resilience, when the second keycap 190 is pressed and released, the second keycap 190 can rebound, thereby disconnecting the metal conductive part 170 from the conductive contact 140.
[0034] Optionally, the first protrusion is also made of rubber material, so that the key cap 160 and the metal conductive member 170 can be insulated to prevent the key cap 160 from being charged when the user presses the key cap 160, thereby preventing the user from getting an electric shock.
[0035] Optionally, the key cap 160 has a cylindrical structure.
[0036] In one embodiment of the present disclosure, the conductive contact 140 includes two semicircular contacts that are disposed opposite to each other and have a spacing therebetween. When the metal conductive member 170 contacts the conductive contact 140 , the two semicircular contacts are connected through the metal conductive member 170 .
[0037] In one embodiment of the present disclosure, in one embodiment of the present disclosure, the number of switch buttons can be two, one switch button serves as a test function, and the other switch button serves as a reset function. The conductive contacts may also include test contacts and reset contacts. The test contacts and reset contacts are relatively arranged on the circuit board. Specifically, when one of the buttons serves as a test function, it is a test contact. When the test contact is turned on, a simulated leakage current will be generated on the circuit board, and the zero-sequence current transformer will sense this current, which will be amplified by the integrated circuit to cause the thyristor to operate, so that the coil loses voltage and the loop switch is disconnected, thereby playing a role in leakage protection of the equipment. When the other button serves as a reset function, its conductive contact is a reset contact. When the reset contact is turned on, the two transistors on the circuit board are turned on, the coil is energized, and the reset switch is quickly closed. At this time, the two transistors are cut off, and the coil and the transistor maintain the closure of the switch in the loop to achieve the reset function.
[0038] It should be understood that the present disclosure does not limit its application to the detailed structure and arrangement of the components proposed in this specification. The present disclosure can have other embodiments and can be implemented and executed in a variety of ways. The aforementioned variations and modifications fall within the scope of the present disclosure. Moreover, the present disclosure disclosed and defined in this specification extends to all alternative combinations of two or more individual features mentioned or evident in the text and / or the drawings. All these different combinations constitute multiple alternative aspects of the present disclosure. The embodiments of this specification illustrate the best mode known for implementing the present disclosure and will enable those skilled in the art to utilize the present disclosure.
Claims
1. A circuit breaker, characterized in that: The circuit breaker comprises: The circuit breaker body comprises a first shell and a second shell connected to each other, wherein a circuit board is arranged in the first shell, the circuit board is provided with conductive contacts, and the second shell is provided with through holes corresponding to the conductive contacts; A switch button comprises a keycap and a metal conductive part arranged in the keycap, wherein the keycap comprises a first keycap and a second keycap connected to each other, the diameter of the first keycap is larger than the diameter of the second keycap, the second keycap has a receiving cavity corresponding to the metal conductive part, and the metal conductive part is arranged in the receiving cavity. When the first shell and the second shell are closed, the second keycap passes through the through hole and is exposed on the end surface of the second shell. When the second keycap is pressed, the metal conductive part is electrically connected to the conductive contact.
2. The circuit breaker according to claim 1, characterized in that: The diameter of the second key cap is the same as the diameter of the through hole.
3. The circuit breaker according to claim 1, characterized in that: The metal conductive member and the conductive contact are made of copper.
4. The circuit breaker according to claim 1, characterized in that: A first protrusion is arranged in the accommodating cavity, the first protrusion is arranged with a groove, and the metal conductive member is arranged with a second protrusion engaged with the groove.
5. The circuit breaker according to claim 1, characterized in that: The key cap is made of rubber.
6. The circuit breaker according to claim 1, characterized in that: The key cap is in a cylindrical shape.
7. The circuit breaker according to claim 1, characterized in that: The conductive contact includes two semicircular contacts which are oppositely arranged and have a spacing therebetween.