Wiring device for plug-in circuit breaker

Abstract

A wiring device for a plug-in circuit breaker. The invention is characterized in that: it comprises a terminal block, a pressing plate, and an elastic member, including a pressing plate, a pressure block, and an elastic member. The pressing plate is movably arranged in a shell and corresponds to the terminal block. The pressure block is movably arranged in the shell, and a notch groove is formed correspondingly on the side wall of the shell. The elastic member is arranged between the pressure block and the pressing plate, and can drive the pressing plate to press the terminal block and drive the pressure block to extend out of the notch groove. The advantage is that when the plug-in circuit breaker is not inserted into the cabinet, the elastic member only provides a pre-tightening force for the pressing plate to press the terminal block, and the external wire can be directly connected and disconnected by inserting or pulling out, without the need for additional tools, and the connection and disconnection operation is more convenient; when the plug-in circuit breaker is inserted into the cabinet after the wiring is completed, the pressure block will be pressed into the shell after it is in place, thereby compressing the elastic member, enhancing the pressing force of the pressing plate on the terminal block, ensuring that the wiring is firm and reliable and not easy to fall off, and the connection stability is better.

Description

Technical Field

[0001] The invention relates to a circuit breaker, in particular to a wiring device of a plug-in circuit breaker. Background Art

[0002] Circuit breakers are divided into high-voltage circuit breakers and low-voltage circuit breakers according to their scope of use. Low-voltage circuit breakers, also known as automatic switches, are electrical appliances that have both the function of a manual switch and can automatically provide protection against loss of voltage, undervoltage, overload, and short circuit. They can be used to distribute electrical energy, start asynchronous motors infrequently, and protect power lines and motors. When they experience serious overloads, short circuits, undervoltage, and other faults, they can automatically cut off the circuit. Its function is equivalent to a combination of a fuse-type switch and an over-underheating relay, and generally no parts need to be changed after breaking the fault current, so it has been widely used.

[0003] Circuit breakers are divided into plug-in type, fixed type and drawer type according to the installation method. The use of plug-in circuit breakers can effectively improve the safety of the electrical equipment use industry. With the widespread use of plug-in circuit breakers in various electrical equipment, in order to meet the installation needs of various different electrical equipment, the structure of plug-in circuit breakers has also developed into various types. The existing plug-in small circuit breakers generally use screw wiring to connect the wires, and the wiring operation is more troublesome.

[0004] For example, a plug-in miniature circuit breaker disclosed in a Chinese invention patent application (CN107993900A) has an outlet terminal B composed of a spring piece B2 and a terminal block B1. When wiring, the external wire is directly inserted into the port, and the external wire is pressed against the terminal block B1 by the spring piece B2.

[0005] The outlet terminal structure of the above structure forms an angle between the spring piece B2 and the terminal block B1, which forms a guiding effect when wiring, so the wiring operation is very convenient. After the wiring is completed, it forms a reverse tooth limiting effect, so that the external wire cannot be pulled out directly. Therefore, when removing the wire, it is necessary to use a screwdriver or a similar long tool to reach into the port to press down the spring piece B2 to separate the spring piece B2 from the terminal block B1, and then the external wire can be pulled out. The wire removal operation is very inconvenient. Summary of the invention

[0006] In order to overcome the shortcomings of the background technology, the present invention provides a wiring device for a plug-in circuit breaker, which solves the problem of inconvenient wiring and disconnection operations at the outlet terminal of the existing plug-in circuit breaker.

[0007] The technical solution adopted by the present invention is as follows: a wiring device for a plug-in circuit breaker, which is arranged at the outer end of a shell of the plug-in circuit breaker; it includes a wiring board, an extrusion plate, a pressure block, and an elastic member, wherein the wiring board is fixedly installed in the shell, the extrusion plate is movably arranged in the shell and corresponds to the wiring board, the pressure block is movably arranged in the shell, a notch groove corresponding to the pressure block is formed on the side wall of the shell, and the elastic member is arranged between the pressure block and the extrusion plate, which can drive the extrusion plate to press the wiring board and drive the pressure block to extend out of the notch groove.

[0008] The extrusion plate comprises an extrusion portion corresponding to the wiring board, and arc-shaped guide portions are formed at two ends of the extrusion portion.

[0009] A first shaft is arranged in the shell, and the other end of the extrusion plate relative to the extrusion portion is bent to form a rotating portion. The rotating portion is sleeved on the first shaft and rotatably matches with the first shaft.

[0010] A second shaft is arranged in the shell, a positioning hole is formed on the pressing block, and the pressing block is rotatably mounted on the second shaft through the positioning hole.

[0011] The elastic member is a spring, and two ends of the spring are respectively against the pressing block and the extrusion plate.

[0012] The pressing block is provided with a spring positioning column matched with the spring.

[0013] The pressing block is provided with a limiting portion which cooperates with the edge of the notch groove.

[0014] The beneficial effects of the present invention are as follows: when the above scheme is adopted, when the plug-in circuit breaker is not inserted into the cabinet, the elastic member only provides a pre-tightening force for the extrusion plate to the wiring board, and the external wire can be directly connected and disconnected by inserting or pulling out, without the need for additional tools, and the connection and disconnection operations are more convenient; when the wiring is completed, the plug-in circuit breaker is inserted into the cabinet, and the pressure block is pressed into the inside of the shell after it is in place, thereby compressing the elastic member and enhancing the pressing force of the extrusion plate on the wiring board, thereby ensuring that the wiring is firm and reliable and not easy to fall off, and the connection stability is better. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic structural diagram of a plug-in circuit breaker according to an embodiment of the present invention.

[0016] Figure 2 It is a structural schematic diagram of the wiring device when the plug-in circuit breaker according to the embodiment of the present invention is not inserted into the cabinet.

[0017] Figure 3 It is a structural schematic diagram of a wiring device when a plug-in circuit breaker according to an embodiment of the present invention is inserted into a cabinet.

[0018] Figure 4It is a schematic structural diagram of an extruded plate according to an embodiment of the present invention.

[0019] Figure 5 Schematic diagram of the structure of a compact according to an embodiment of the present invention. DETAILED DESCRIPTION

[0020] The embodiments of the present invention are further described below in conjunction with the accompanying drawings:

[0021] As shown in the figure, a wiring device of a plug-in circuit breaker is arranged at the outer end of a housing 1 of the plug-in circuit breaker, and includes a wiring board 2, a pressing plate 3, a pressing block 4, and an elastic member 5.

[0022] The terminal block 2 is fixedly installed in the housing 1, the extrusion plate 3 is movably arranged in the housing 1 and corresponds to the terminal block 2, the pressure block 4 is movably arranged in the housing 1, and a notch groove 11 corresponding to the pressure block 4 is formed on the side wall of the housing 1. The elastic member 5 is arranged between the pressure block 4 and the extrusion plate 3, and can drive the extrusion plate 3 to press the terminal block 2 and drive the pressure block 4 to extend out of the notch groove 11.

[0023] The extrusion plate 3 and the pressing block 4 are both hinged in the housing 1, which is not only convenient for assembly, but also more conducive to the overall space layout and reduces the volume. Specifically, a first shaft 12 is provided in the housing 1, and one end of the extrusion plate 3 is bent to form a rotating portion 33, and the rotating portion 33 is sleeved on the first shaft 12 and forms a rotatable fit with the first shaft 12; a second shaft 13 is provided in the housing 1, and a positioning hole 41 is formed on the pressing block 4, and the pressing block 4 is rotatably mounted on the second shaft 13 through the positioning hole 41. Of course, in addition to this, the extrusion plate 3 and the pressing block 4 can also be movable in the housing 1 by other means such as sliding.

[0024] The elastic member 5 is a spring, and its two ends are respectively against the pressing block 4 and the extrusion plate 3. In order to ensure the stable installation of the spring, a spring positioning column 42 adapted to the spring is also provided on the pressing block 4. Of course, a torsion spring or other elastic member can also be used.

[0025] Usually, when the plug-in circuit breaker is in use, it needs to be inserted into the corresponding slot in the cabinet. When the plug-in circuit breaker is not inserted into the slot of the cabinet, the pressure block 4 will pass through the notch groove 11 under the action of the elastic member 5, and part of its structure will extend out of the shell 1. The elastic force of the elastic member 5 itself will also be released, and it only provides a pre-tightening force for the extrusion plate to the terminal block. Therefore, at this time, the external wire can be easily inserted between the extrusion plate 3 and the terminal block 2 or pulled out; when the plug-in circuit breaker is inserted into the slot of the cabinet and inserted into place, the outer wall of the shell of the plug-in circuit breaker forms a corresponding contact fit with the inner wall of the slot, and the pressure block 4 will be pressed into the shell 1 under the restriction of the inner wall of the corresponding slot, and the elastic member 5 will be squeezed, and the elastic force will increase, thereby providing a clamping force for the extrusion plate to the terminal block. Therefore, at this time, the extrusion plate 3 and the terminal block 2 can clamp the external wire to prevent the external wire from being pulled out, thereby ensuring reliable wiring.

[0026] By adopting the above scheme, when wiring or disconnection is required, the plug-in circuit breaker is pulled out from the cabinet, and the external wire can be directly connected or disconnected by plugging in or pulling out, without the need for additional tools, making the connection and disconnection operations more convenient; when the wiring is completed, the plug-in circuit breaker is inserted into the cabinet, and when it is in place, the pressure block will be pressed into the inside of the shell, thereby compressing the elastic part and enhancing the pressing force of the extrusion plate on the wiring board, thereby ensuring that the wiring is firm and reliable and not easy to fall off, and the connection stability is better

[0027] In addition, the extrusion plate 3 also includes an extrusion portion 31 corresponding to the terminal block 2 to ensure sufficient contact area between the extrusion plate 3 and the terminal block 2 to further ensure the connection effect. Arc-shaped guide portions 32 are formed at both ends of the extrusion portion 31 to guide the external wires during wiring or disconnection, making the operation smoother and easier.

[0028] The pressing block 4 is also provided with a limiting portion 43 which cooperates with the edge of the notch groove 11 to further ensure stable installation of the pressing block 4 and the elastic member 5 .

[0029] In the description of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0030] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. In addition, in the description of the present invention, unless otherwise specified, "plurality" means two or more.

[0031] Technical personnel should note that although the present invention has been described according to the above specific implementation methods, the inventive concept of the present invention is not limited to this invention, and any modification using the inventive concept will be included in the scope of protection of this patent.

Claims

1. A wiring device for a plug-in circuit breaker, which is arranged at the outer end of a housing (1) of the plug-in circuit breaker; characterized in that: It comprises a wiring board (2), an extrusion plate (3), a pressing block (4), and an elastic member (5); the wiring board (2) is fixedly mounted in a housing (1); the extrusion plate (3) is movably arranged in the housing (1) and corresponds to the wiring board (2); the pressing block (4) is movably arranged in the housing (1); a notch groove (11) corresponding to the pressing block (4) is formed on a side wall of the housing (1); the elastic member (5) is arranged between the pressing block (4) and the extrusion plate (3) and can drive the extrusion plate (3) to press the wiring board (2) and drive the pressing block (4) to extend out of the notch groove (11); When the plug-in circuit breaker is not inserted into the slot of the cabinet, the pressing block passes through the notch groove under the action of the elastic member, and the elastic force of the elastic member is released, only providing a pre-tightening force for the extrusion plate to the terminal block; when the plug-in circuit breaker is inserted into the slot of the cabinet, the pressing block will be pressed into the shell, and the elastic member will be squeezed, providing a clamping force for the extrusion plate to the terminal block.

2. A wiring device for a plug-in circuit breaker according to claim 1, characterized in that: The extrusion plate (3) comprises an extrusion portion (31) corresponding to the wiring board (2), and arc-shaped guide portions (32) are formed at both ends of the extrusion portion (31).

3. A wiring device for a plug-in circuit breaker according to claim 2, characterized in that: A first shaft (12) is provided in the housing (1); the other end of the extrusion plate (3) relative to the extrusion portion (31) is bent to form a rotating portion (33); the rotating portion (33) is sleeved on the first shaft (12) and rotatably fits with the first shaft (12).

4. A wiring device for a plug-in circuit breaker according to claim 1, characterized in that: A second shaft (13) is provided in the housing (1), a positioning hole (41) is formed on the pressing block (4), and the pressing block (4) is rotatably mounted on the second shaft (13) through the positioning hole (41).

5. The wiring device of a plug-in circuit breaker according to claim 1, characterized in that: The elastic member (5) is a spring, and two ends of the elastic member are respectively in contact with the pressing block (4) and the extrusion plate (3).

6. A wiring device for a plug-in circuit breaker according to claim 5, characterized in that: The pressing block (4) is provided with a spring positioning column (42) adapted to the spring.

7. The wiring device of a plug-in circuit breaker according to claim 1, characterized in that: The pressing block (4) is provided with a limiting portion (43) which cooperates with the edge of the notch groove (11) to limit the position.

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