Circuit protection device

Abstract

The utility model provides a circuit protection device, and belongs to the technical field of circuit protection, the circuit protection device comprises a housing, a disconnection assembly, a base and a top seat, the housing is a square structure, and the top of the housing is provided with a through hole; the base and the top seat are respectively arranged at the lower part and the upper part of the interior of the shell; the disconnection assembly is arranged between the base and the top seat, the top of the disconnection assembly penetrates through the through hole, and the bottom of the disconnection assembly penetrates through the shell; a movable contact and a static contact are arranged on the disconnection assembly, and the connection and disconnection of the movable contact and the static contact are realized through the up-down movement of the disconnection assembly; the utility model provides a circuit protection device, which can solve the problems of unstable current, overlarge contact resistance and stray inductance caused by direct contact between a key rod and a contact elastic sheet.

Description

Technical Field

[0001] The utility model belongs to the technical field of circuit protection, and in particular relates to a circuit protection device. Background Art

[0002] Circuit protection devices are commonly used to disconnect electrical circuits when overloaded, preventing circuit damage. They are widely used to protect and monitor three-phase motors and other electrical appliances in industries such as machinery, metallurgy, building materials, chemicals, and textiles. Most circuit breakers are located in electrical sockets. When circuit control and overload protection are required, an overload protection switch is installed between the socket and the device circuit.

[0003] Circuit protection devices are primarily used to protect electrical equipment from damage due to overloads, short circuits, or other faults. They protect equipment by automatically disconnecting circuits, ensuring safe operation and preventing dangerous situations such as fires. When the current of an electrical device exceeds its rated value, an overload protection device automatically disconnects the circuit to prevent the equipment from burning out due to overload. In the event of a short circuit, the protection device quickly cuts off the power supply, preventing the sudden increase in current that could damage the equipment or cause a fire. A leakage protection device detects a current leak and quickly cuts off the power supply, preventing electric shock and equipment damage. Many modern protection devices are equipped with monitoring functions that can monitor parameters such as current and voltage in real time and provide early warnings, helping maintenance personnel to promptly identify and address potential problems.

[0004] The button rod of a conventional circuit protection device is in direct contact with the contact spring, which may cause problems such as current instability, excessive contact resistance and stray inductance. Utility Model Content

[0005] In view of this, the present invention provides a circuit protection device that can solve the problems of unstable current, excessive contact resistance and stray inductance caused by direct contact between a key rod and a contact spring.

[0006] The utility model is achieved in this way:

[0007] The utility model provides a circuit protection device, which includes a shell, a disconnect assembly, a base and a top seat. The shell is a square structure with a through hole on the top. The base and the top seat are respectively arranged at the lower and upper positions inside the shell. The disconnect assembly is arranged between the base and the top seat, with the top of the disconnect assembly passing through the through hole and the bottom passing through the shell. The disconnect assembly is provided with a moving contact and a static contact, which are used to realize the connection and disconnection of the moving contact and the static contact by the up and down movement of the disconnect assembly.

[0008] The housing is a square structure with a through-hole at the top. This design allows the housing to provide good spatial stability and strength while facilitating the operation and connection of internal components. The housing effectively protects internal circuit components from external physical impact, dust, moisture, and other environmental factors, thereby improving the durability and reliability of the device. The square structure facilitates air circulation, and combined with the through-hole design, it effectively dissipates heat, reduces internal temperatures, and prevents failures caused by overheating. The standardized design of the square housing facilitates installation and fixing in a variety of application environments.

[0009] The base is located in the lower interior of the housing and is typically fixed, preventing movement with internal components. It provides basic support for the entire circuit protection device, ensuring the stability of the housing and internal components. The base can be designed to be grounded to prevent leakage or short circuits, enhancing device safety. The base typically connects to the power cord or other circuitry, ensuring power supply.

[0010] The disconnect assembly is positioned between the base and the top, with its top extending through a through-hole and its bottom extending through the housing. It features a movable contact and a stationary contact. These contacts connect and disconnect by moving up and down, a core function of the circuit protection device, effectively controlling the conduction and disconnection of the circuit to prevent overloads and short circuits. The disconnect assembly is designed to quickly respond to current fluctuations, promptly disconnecting or restoring the circuit and providing necessary protection. It can be designed with manual or automatic control, enabling different operating modes and enhancing the device's adaptability.

[0011] The top mount, located in the upper portion of the housing, opposite the base, secures the top of the disconnect assembly. It secures and supports the disconnect assembly, ensuring stability and accuracy during operation. It prevents accidental contact with the disconnect assembly, enhancing operational safety. The top mount may also feature indicator lights, control buttons, or monitoring interfaces to enhance the functionality of the circuit protection device.

[0012] On the basis of the above technical solution, a circuit protection device of the present invention can also be improved as follows:

[0013] In which, the disconnect assembly includes a pressing piece, a first pin and a second pin, the pressing piece includes a button rod, a spring and a contact spring, the first pin and the second pin are correspondingly arranged between the base and the top seat, one end of the contact spring is connected to the top of the second pin, and the other end is connected to the inside of the first pin; the button rod is inserted into the interior of the shell from the through hole at the top of the shell, and a gap is provided between its bottom and the top of the contact spring, and the gap is used to separate the button rod from the contact spring so that the button rod and the contact spring are not in direct contact; the spring is sleeved in the middle position of the button rod, and the spring is used to increase the pressing stroke of the button rod.

[0014] Furthermore, a square groove is provided at a position where the top seat cooperates with the through hole on the shell, and the spring is provided in the square groove.

[0015] Furthermore, a static contact is provided inside the first pin, and a moving contact is provided on the top of the contact spring.

[0016] Furthermore, grooves are provided at both ends of the contact spring to increase the tensile strength of the contact spring to eliminate stress and prevent the risk of material failure due to metal fatigue during long-term use.

[0017] Furthermore, a protrusion is provided on one side of the second pin, and a corresponding position of the contact spring passes through the protrusion, and the protrusion is used to fix one end of the contact spring.

[0018] The primary function of the protrusion is to secure one end of the contact spring, preventing it from shifting or falling off during operation. Once secured, the spring allows for flexible movement when subjected to external forces at its free end, thus playing a crucial role in the circuit's switching operation. This fixed contact spring ensures good contact with other electrical components during operation, reducing circuit failures caused by poor contact and thereby improving overall circuit reliability.

[0019] Furthermore, both ends of the first pin and the second pin are bent to fit into the gap between the shell and the base to ensure the stability of the structure.

[0020] Compared with the prior art, the circuit protection device provided by the present invention has the following beneficial effects:

[0021] The square structure of the housing provides excellent physical protection, preventing internal components from external impact or damage. Its design ensures overall stability and reliability of the device. The top through-hole allows for operation of the key components.

[0022] The base provides the necessary support for the key assembly, preventing it from shifting during operation and ensuring proper force transmission with every press. A raised protrusion on one side of the base limits the upward and downward movement of the contact spring, preventing damage caused by excessive movement. This design ensures the stability of the key assembly during operation, enhancing durability and reliability.

[0023] The top base's static contact points align with the moving contacts in the key assembly, connecting and disconnecting the circuit through the up and down movement of the key assembly, thus acting as a critical electrical switch. The top base's square slot accommodates the spring, ensuring a stable position and enhancing the assembly's overall functionality.

[0024] The spring-loaded movement of the push-button lever increases the travel, providing greater operating space and flexibility. The coordination between the contact spring and the static contact ensures reliable connection and disconnection of the circuit, reducing the risk of poor contact. The static contact and the moving contact work together to form an electrical connection or disconnection path, enhancing the reliability of the circuit protection device.

[0025] The bent design of the pins enhances the stability of the base, making the circuit protection device more robust during use and reducing unexpected failures due to external vibration or impact. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments of the present invention. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0027] Figure 1 It is a structural schematic diagram of a circuit protection device;

[0028] Figure 2 is a schematic diagram of the cross-sectional structure of a circuit protection device;

[0029] Figure 3 It is a schematic diagram of the pin structure;

[0030] In the accompanying drawings, the components represented by the reference numerals are as follows:

[0031] 10. Housing; 20. Disconnect assembly; 21. Pressing element; 211. Key rod; 212. Spring; 213. Contact spring; 22. First pin; 23. Second pin; 30. Base; 40. Top seat. DETAILED DESCRIPTION

[0032] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention.

[0033] like Figure 1 As shown, a first embodiment of a circuit protection device provided by the utility model is shown. In this embodiment, it includes a shell 10, a disconnect assembly 20, a base 30 and a top seat 40. The shell 10 is a square structure with a through hole on the top; the base 30 and the top seat 40 are respectively arranged at the lower and upper positions inside the shell 10; the disconnect assembly 20 is arranged between the base 30 and the top seat 40, and the top of the disconnect assembly 20 passes through the through hole, and the bottom passes through the shell 10; the disconnect assembly 20 is provided with a moving contact and a static contact, which are used to realize the connection and disconnection of the moving contact and the static contact by the up and down movement of the disconnect assembly 20.

[0034] like Figure 1-2 As shown, it is a second embodiment of a circuit protection device provided by the utility model. In this embodiment, it includes a shell 10, a disconnect assembly 20, a base 30 and a top seat 40. The shell 10 is a square structure with a through hole on the top; the base 30 and the top seat 40 are respectively arranged at the lower and upper positions inside the shell 10; the disconnect assembly 20 is arranged between the base 30 and the top seat 40, and the top of the disconnect assembly 20 passes through the through hole and the bottom passes through the shell 10; the disconnect assembly 20 is provided with a moving contact and a static contact, which are used to realize the connection and disconnection of the moving contact and the static contact by the up and down movement of the disconnect assembly 20.

[0035] Among them, in the above technical solution, the disconnect component 20 includes a pressing member 21, a first pin 22 and a second pin 23. The pressing member 21 includes a button rod 211, a spring 212 and a contact spring 213. The first pin 22 and the second pin 23 are correspondingly arranged between the base 30 and the top seat 40. One end of the contact spring 213 is connected to the top of the second pin 23, and the other end is connected to the inside of the first pin 22; the button rod 211 is inserted into the interior of the shell 10 from the through hole at the top of the shell 10, and a gap is provided between its bottom and the top of the contact spring 213. The gap is used to separate the button rod 211 from the contact spring 213 so that the button rod 211 and the contact spring 213 are not in direct contact; a spring 212 is sleeved in the middle position of the button rod 211, and the spring 212 is used to increase the pressing stroke of the button rod 211.

[0036] Furthermore, in the above technical solution, a square groove is provided at the position where the top seat 40 matches the through hole on the shell 10, and the spring 212 is provided in the square groove.

[0037] Furthermore, in the above technical solution, a static contact is provided inside the first pin 22 , and a moving contact is provided on the top of the contact spring 213 .

[0038] like Figure 3 As shown, it is a third embodiment of a circuit protection device provided by the present invention. In this embodiment, grooves are provided at both ends of the contact spring 213 to increase the tensile strength of the contact spring 213 to eliminate stress and prevent the risk of material failure due to metal fatigue during long-term use.

[0039] Furthermore, in the above technical solution, a protrusion is provided on one side of the second pin 23 , and the corresponding position of the contact spring 213 passes through the protrusion, and the protrusion is used to fix one end of the contact spring 213 .

[0040] Furthermore, in the above technical solution, both ends of the first pin 22 and the second pin 23 are bent to fit in the gap between the housing 10 and the base 30 to ensure the stability of the structure.

[0041] Specifically, the principle of the present invention is as follows: when in use, the spring 212 sleeved on the button rod 211 increases the pressing stroke, and the button rod 211 is pressed downward to separate the contact spring 213 and the first pin 22. When the pressing stops, the button rod 211 is reset by the spring 212 to drive the contact spring 213 to re-contact the first pin 22, thereby ensuring the stability of the current; when the button rod 211 is covered with foreign matter, pressing the button rod 211 downward will push open the contact spring 213, separating the moving contact from the static contact, disconnecting the power supply, protecting the circuit, and ensuring safety.

Claims

1. A circuit protection device, characterized in that: The invention comprises a shell (10), a disconnect assembly (20), a base (30) and a top seat (40), wherein the shell (10) is a square structure with a through hole on the top; the base (30) and the top seat (40) are respectively arranged at the lower and upper positions inside the shell (10); the disconnect assembly (20) is arranged between the base (30) and the top seat (40), the top of the disconnect assembly (20) passes through the through hole, and the bottom passes through the shell (10); the disconnect assembly (20) is provided with a moving contact and a static contact, which are used to realize the connection and disconnection of the moving contact and the static contact by the up and down movement of the disconnect assembly (20).

2. A circuit protection device according to claim 1, characterized in that: The disconnect assembly (20) includes a pressing member (21), a first pin (22) and a second pin (23); the pressing member (21) includes a key rod (211), a spring (212) and a contact spring (213); the first pin (22) and the second pin (23) are correspondingly arranged between the base (30) and the top seat (40); one end of the contact spring (213) is connected to the top of the second pin (23), and the other end is connected to the inside of the first pin (22); the key The rod (211) is inserted into the interior of the housing (10) from the through hole at the top of the housing (10), and a gap is provided between the bottom of the rod (211) and the top of the contact elastic sheet (213), and the gap is used to separate the key rod (211) and the contact elastic sheet (213) so that the key rod (211) and the contact elastic sheet (213) do not directly contact each other; the spring (212) is sleeved in the middle position of the key rod (211), and the spring (212) is used to increase the pressing stroke of the key rod (211).

3. A circuit protection device according to claim 2, characterized in that: A square groove is provided at a position where the top seat (40) matches the through hole on the housing (10), and the spring (212) is provided in the square groove.

4. A circuit protection device according to claim 3, characterized in that: A static contact is provided inside the first pin (22), and a moving contact is provided on the top of the contact spring (213).

5. A circuit protection device according to claim 4, characterized in that: Grooves are provided at both ends of the contact spring piece (213) for increasing the tensile strength of the contact spring piece (213) to eliminate stress and prevent the risk of material failure due to metal fatigue during long-term use.

6. A circuit protection device according to claim 5, characterized in that: A protrusion is provided on one side of the second pin (23), and the corresponding position of the contact spring (213) passes through the protrusion, and the protrusion is used to fix one end of the contact spring (213).

7. A circuit protection device according to claim 6, characterized in that: Both ends of the first pin (22) and the second pin (23) are bent and matched with the gap between the housing (10) and the base (30) to ensure the stability of the structure.

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