Mounting structure of residual-current circuit breaker

Abstract

The utility model discloses a mounting structure of a residual-current circuit breaker. The problem that the torsion spring of the residual-current circuit breaker is easy to deviate and needs to be manually straightened during installation is mainly solved. The device is characterized by further comprising a supporting tube (14) which is arranged in the first cavity and is used for being rotatably connected with the tripping shaft; the torsional spring (15) comprises a spring body and a pin (151), and the supporting pipe is sleeved with the spring body; the push plate (142) is arranged on the tripping shaft; the boss (3) is arranged in the second cavity, and one pin makes contact with the upper end face of the boss and is arranged opposite to the push plate. According to the installation structure of the residual-current circuit breaker provided by the utility model, after the torsion spring is installed, the pin of the torsion spring can be automatically supported in place by the boss, thereby facilitating the subsequent rotation of the rotating shaft, avoiding the need of manual straightening, and facilitating the subsequent automatic assembly.

Description

Technical Field

[0001] This utility model relates to the field of switchgear, specifically to an installation structure for a residual current circuit breaker. Background Technology

[0002] The first chamber of a residual current circuit breaker (RCCB) houses traditional circuit breaker components, including moving and stationary contacts, trip units, bimetallic strips, arc-extinguishing chambers, and handles. The first chamber also contains the residual current assembly, which includes a circuit board and a second trip unit. When a leakage occurs, the trip unit drives the bracket in the first chamber to trip, and simultaneously drives the bracket in the second chamber to trip via a rotating shaft. The rotating shaft usually requires a torsion spring for installation. In conventional cases, the part of the housing that mates with the torsion spring is flat. As a result, after installation, the torsion spring pins are not supported and are prone to misalignment, requiring manual alignment. Utility Model Content

[0003] To overcome the shortcomings of the prior art, this utility model provides an installation structure for a residual current circuit breaker, which mainly solves the problem that the residual current circuit breaker is prone to misalignment when the installation torsion spring is installed and needs to be manually straightened.

[0004] The technical solution of this utility model is as follows:

[0005] An installation structure for a residual current circuit breaker includes a housing, within which a first chamber and a second chamber are provided. The first chamber houses a circuit board, a trip unit, and a tripping mechanism. The tripping mechanism includes a tripping shaft that is linked to a handle in the second chamber.

[0006] A support tube, located within the first cavity, is used for rotatable connection of the trip shaft;

[0007] A torsion spring, comprising a spring body and leads, wherein the spring body is sleeved outside the support tube;

[0008] A push plate is disposed on the trip shaft;

[0009] A boss is disposed in the second cavity, and one of the pins contacts the upper end face of the boss and is disposed opposite to the push plate.

[0010] It also includes a baffle, which is disposed on the trip shaft and correspondingly disposed above the pin.

[0011] The boss is integrally formed with the housing.

[0012] The circuit board is provided with an electrically connected conductive plate, which is installed on the inner wall of the housing; the housing is also provided with a movably installed test button, and an elastic element is provided inside the housing. The test button extends out of the housing through the elastic force of the elastic element, and the elastic element contacts the conductive plate when the test button is pressed.

[0013] The housing is provided with a guide plate, and a guide groove is formed between the guide plate and the side wall of the housing. Some of the test buttons are located in the guide groove.

[0014] The elastic element is a second torsion spring.

[0015] The housing is provided with raised ribs, and the test button is provided with a sliding groove that slides in conjunction with the raised ribs.

[0016] The test button has a receiving groove at its bottom for a pin of the second torsion spring to extend into.

[0017] The trip unit is provided with a positioning pin, and the circuit board is provided with a pin hole that engages with the positioning pin.

[0018] The beneficial effects of this utility model are: This utility model provides an installation structure for a residual current circuit breaker. After the torsion spring is installed, its pins will be automatically positioned by the boss, which facilitates the subsequent rotation of the rotating shaft. It does not require manual alignment and is conducive to subsequent automated assembly. Attached Figure Description

[0019] Figure 1 This is an internal perspective view of one embodiment of the present utility model.

[0020] Figure 2 for Figure 1 Enlarged diagram of point A in the middle.

[0021] Figure 3 for Figure 1 Enlarged diagram of point B in the middle.

[0022] Figure 4 This is a partial perspective view of one embodiment of the present invention.

[0023] Figure 5 for Figure 4 Enlarged diagram of point C in the middle.

[0024] Figure 6 This is a partial perspective view of one embodiment of the present invention.

[0025] Figure 7 This is a three-dimensional schematic diagram of the second chamber according to an embodiment of the present invention. Detailed Implementation

[0026] The present invention will be further described below with reference to the accompanying drawings. An installation structure for a residual current circuit breaker includes a housing 1, within which a first chamber and a second chamber are provided. The first chamber contains a circuit board 11, a trip unit, and a tripping mechanism. The tripping mechanism includes a tripping shaft 141 linked to a handle 21 in the second chamber, and a support tube 14 disposed within the first chamber for rotatable connection to the tripping shaft. A torsion spring 15 includes a spring body and a pin 151, the spring body being sleeved outside the support tube. A push plate 142 is disposed on the tripping shaft. A boss 3 is disposed within the second chamber, with one of the pins contacting the upper surface of the boss and positioned opposite the push plate. The second chamber also contains a tripping mechanism, which is prior art and can be referred to accordingly. Figure 7 After the torsion spring of this application is fitted onto the support tube, its pin will fall on the upper end face of the boss without any deflection. Then, the trip shaft can be easily installed. The trip shaft is equipped with a linkage rod to drive the circuit breaker handle, which is existing technology and will not be described in detail here. The pin will be opposite to the push plate to provide elastic force. The second chamber can be an L-pole chamber, and the first chamber can be an N-pole chamber. The push plate is located inside the boss.

[0027] In this embodiment, as shown in the figure, a baffle 143 is also included, disposed on the trip shaft and correspondingly positioned above the pin. This baffle provides a limiting position, making the installation more stable.

[0028] In this embodiment, as shown in the figure, the boss is integrally formed with the housing. It can be integrally injection molded.

[0029] In this embodiment, as shown in the figure, the circuit board is provided with an electrically connected conductive plate 111, which is mounted on the inner wall of the housing. The housing also has a movably mounted test button 4. An elastic element 5 is provided inside the housing, and the test button extends out of the housing through the elastic force of the elastic element. When the test button is pressed, the elastic element contacts the conductive plate. One end of the elastic element is electrically connected to the circuit board, and the other end is connected to the conductive plate when the test button is pressed. Normally, the elastic element also provides the elastic force for the test button to reset; a torsion spring is preferred.

[0030] In this embodiment, as shown in the figure, a guide plate 18 is provided inside the housing, and a guide groove 181 is formed between the guide plate and the side wall of the housing. Some of the test buttons are located in the guide groove. This results in smoother operation.

[0031] In this embodiment, as shown in the figure, the elastic element is a second torsion spring.

[0032] In this embodiment, as shown in the figure, the housing is provided with a raised rib 16, and the test button is provided with a groove 41 that slides in conjunction with the raised rib. This results in smoother operation.

[0033] In this embodiment, as shown in the figure, the bottom of the test button is provided with a receiving groove 42 for one of the pins of the second torsion spring to extend into. This prevents it from coming out and makes it more stable to use.

[0034] In this embodiment, as shown in the figure, the trip unit is provided with a positioning pin 121, and the circuit board is provided with a pin hole that engages with the positioning pin. The circuit board and the trip unit can be assembled together for easy overall assembly.

[0035] In the description of this utility model, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0036] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0037] The embodiments described with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention. The embodiments should not be considered as limitations on the present invention, but any improvements made based on the spirit of the present invention should be within the protection scope of the present invention.

Claims

1. An installation structure for a residual current circuit breaker, comprising a housing (1), wherein the housing has a first chamber and a second chamber, the first chamber having a circuit board (11), a trip unit, and a tripping mechanism, the tripping mechanism including a tripping shaft (141) linked to a handle (21) of the second chamber, characterized in that: Also includes The support tube (14) is located in the first chamber and is used for rotatable connection of the trip shaft; A torsion spring (15) includes a spring body and a pin (151), the spring body being sleeved outside the support tube; Push plate (142) is provided on the trip shaft; A boss (3) is located in the second chamber, and one of the pins contacts the upper end face of the boss and is positioned opposite to the push plate.

2. The installation structure of a residual current circuit breaker according to claim 1, characterized in that: It also includes a baffle (143) disposed on the trip shaft and correspondingly disposed above the pin.

3. The installation structure of a residual current circuit breaker according to claim 2, characterized in that: The boss is integrally formed with the housing.

4. The installation structure of a residual current circuit breaker according to claim 3, characterized in that: The circuit board is provided with an electrically connected conductive plate (111), which is installed on the inner wall of the housing; the housing is also provided with a movably installed test button (4), and an elastic element (5) is provided inside the housing. The test button extends out of the housing through the elastic force of the elastic element, and the elastic element contacts the conductive plate when the test button is pressed.

5. The installation structure of a residual current circuit breaker according to claim 4, characterized in that: The housing is provided with a guide plate (18), and a guide groove (181) is formed between the guide plate and the side wall of the housing. Some of the test buttons are located in the guide groove.

6. The installation structure of a residual current circuit breaker according to claim 5, characterized in that: The elastic element is a second torsion spring.

7. The installation structure of a residual current circuit breaker according to claim 6, characterized in that: The housing is provided with a raised rib (16), and the test button is provided with a sliding groove (41) that slides in cooperation with the raised rib.

8. The installation structure of a residual current circuit breaker according to claim 7, characterized in that: The bottom of the test button is provided with a receiving groove (42) for a pin of the second torsion spring to extend into.

9. The installation structure of a residual current circuit breaker according to claim 8, characterized in that: The trip unit is provided with a positioning pin (121), and the circuit board is provided with a pin hole that engages with the positioning pin.

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