Leakage test mechanism and switchgear

Abstract

A kind of electric leakage test mechanism and switch device, it includes: test button, can be moved along the height direction of shell under external force;Power spring, it includes the torsion spring body fixedly arranged in shell, it has first elastic arm and second elastic arm, wherein first elastic arm is in contact with test button, the second elastic arm extends to static contact, and it is overlapped on the static contact;Metal piece, it is arranged below the first elastic arm and is electrically connected with control panel;The first elastic arm can be contacted with metal piece under the drive of test button.The elastic arm of power spring is directly extended and directly overlapped with static contact, the wiring is saved, so that internal space will not be affected by wiring, and power spring can extend close to middle shell, so it will not interfere with internal mechanism.

Description

Technical Field

[0001] This utility model relates to the field of low-voltage electrical appliances, specifically to a leakage current testing mechanism and a switching device. Background Technology

[0002] When a circuit breaker has a leakage current protection function, a leakage current test circuit is usually set up so that the operator can periodically perform a self-test on the leakage current protection function of the circuit breaker.

[0003] A conventional leakage current test circuit typically uses a button and a torsion spring. The button is used to press down on the torsion spring, causing one end of the spring to contact a metal component, while the other end of the spring is connected to a terminal block via a wire. This creates a test circuit. However, using a wire to connect the terminal block and the torsion spring requires additional wiring. The torsion spring needs to be wired to connect to the L or N terminal block. Since the terminal block is located at both ends of the circuit breaker, the wiring connecting the torsion spring and the terminal block must pass through the operating mechanism. To avoid interference with the operating mechanism, additional space is needed for the wiring, which encroaches on the internal space of the circuit breaker. Additionally, the wires may have poor soldering, creating a fault point and affecting the normal operation of the leakage current function. Utility Model Content

[0004] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a leakage current testing mechanism and switching device.

[0005] To achieve the above objectives, the present invention provides the following technical solution: A leakage current testing mechanism, comprising: The test button can move along the height of the housing under external force. A power-taking torsion spring includes a torsion spring body fixedly disposed in a housing, having a first elastic arm and a second elastic arm, wherein the first elastic arm abuts against a test button, and the second elastic arm extends to a stationary contact and overlaps the stationary contact. A metal component is located below the first elastic arm; The first elastic arm can contact the metal part when driven by the test button.

[0006] The end of the second elastic arm is bent to form an overlap.

[0007] The housing is provided with a stationary contact mounting bracket, which has an opening, through which the second elastic arm overlaps with the stationary contact.

[0008] The opening has walls on both sides, and a limiting groove is formed between the two walls to restrict the second elastic arm.

[0009] The bottom of the test button extends downward to form a top pressing part, and the bottom of the top pressing part is provided with a positioning groove.

[0010] The test button has anti-detachment components symmetrically arranged on both sides of its bottom.

[0011] A switching device includes a housing, the housing comprising an intermediate housing and side covers disposed on both sides of the intermediate housing, wherein the two sides of the intermediate housing respectively form a first space for accommodating a leakage current protection module and a second space for accommodating a circuit breaker module, and the first space is provided with the aforementioned leakage current testing mechanism.

[0012] A pressure plate is provided on the intermediate housing, and the pressure plate and the intermediate housing form an installation space for the test button.

[0013] The pressure plate has a guide groove on one side, and the top pressing part of the test button is in sliding fit with the guide groove.

[0014] The beneficial effects of this utility model are: by directly extending one elastic arm of the power-taking torsion spring and directly connecting it with the stationary contact, the wiring is eliminated, so that the internal space is not affected by the wiring. At the same time, the power-taking torsion spring can extend close to the middle shell, so it will not interfere with the internal mechanism. Attached Figure Description Figure 1 This is a schematic diagram of the structure of this utility model.

[0015] Figure 2 This is a cross-sectional schematic diagram of the present invention.

[0016] Figure 3 This is a schematic diagram of the internal structure of the rotating frame of this utility model.

[0017] Figure 4 This is a cross-sectional schematic diagram of the rotating frame of this utility model.

[0018] Figure 5 This is a schematic diagram of the structure of the middle frame of this utility model.

[0019] Figure 6 This is a schematic diagram of the power-generating torsion spring of this utility model. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0021] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in the embodiments of this utility model are only used to explain the relative positional relationship and movement of the components in a certain specific posture (as shown in the attached figure). If the specific posture changes, the directional indicator will also change accordingly.

[0022] like Figure 2 As shown, this utility model discloses a leakage current testing mechanism, which is used in a leakage current circuit breaker. It includes a test button and a power-taking torsion spring driven by the test button. The power-taking torsion spring acts as a switch to realize the conduction and disconnection of the test circuit, thereby realizing the leakage current testing function.

[0023] The test button 200 can move along the height direction of the housing 100 under the action of external force; Take a 300mm torsion spring, such as Figure 6 As shown, it includes a torsion spring body 310 fixedly disposed in the housing 100, which has a first elastic arm 330 and a second elastic arm 320, wherein the first elastic arm 330 abuts against the test button 200, and the second elastic arm 320 extends to the stationary contact 600 and overlaps the stationary contact 600. A metal component 400 is located below the first elastic arm 330. The metal component is used to form a test circuit. The metal component is a hollow cylinder with one end fixed to the housing. The first elastic arm 330 can contact the metal part 400 when driven by the test button 200.

[0024] When manually pressed by the consumer, the test button can move downward relative to the housing and press the first elastic arm of the power-taking torsion spring, causing the first elastic arm to move and come into contact with a metal part. This metal part is a hollow cylinder, and any end of it is electrically connected to the control board or the power-taking board. The second elastic arm extends from the inner wall of the housing to the stationary contact and connects with the stationary contact to take power, thus realizing the design of a test circuit, eliminating the need for wiring to connect the torsion spring and the L or N terminal block in the past.

[0025] The end of the second elastic arm 320 is bent to form an overlap portion 321. By bending to form the overlap portion, the second elastic arm can be tightly attached to the inner wall of the housing, and then extend to the stationary contact through the overlap portion. At the same time, the overlap portion is linear, which increases the contact area with the stationary contact, making the contact more reliable. In addition, the elasticity of the second elastic arm bending itself can also make the overlap portion fit better with the stationary contact.

[0026] like Figure 3As shown, the housing 100 is provided with a stationary contact mounting bracket 110. The stationary contact mounting bracket 110 has an opening 111. The second elastic arm 320 overlaps with the stationary contact 600 through the opening 111. The stationary contact is fixedly mounted on the stationary contact mounting bracket and has a contact point. The contact point corresponds to the movement of the moving contact. The part that overlaps with the second elastic arm is the part away from the contact point, so that the second elastic element will not affect the opening and closing of the moving and stationary contacts.

[0027] like Figure 4 As shown, the opening 111 has walls 112 on both sides, and a limiting groove 113 is formed between the two walls 112 to restrict the second elastic arm 320, so that the overlapping part of the second elastic arm is placed in the limiting groove and is restricted from swinging by air, thereby ensuring that the second elastic arm is always in the state of overlapping with the stationary contact.

[0028] The bottom of the test button 200 extends downward to form a top pressing part 210. The bottom of the top pressing part 210 is provided with a positioning groove 211. The positioning groove prevents the first elastic arm from coming out, thereby affecting the leakage test function. Moreover, the downward-extending top pressing part can better drive the first elastic arm to compress and make it contact the metal part to complete the conduction of the test circuit.

[0029] The test button 200 is provided with anti-dislodgement components 220 symmetrically on both sides of its bottom. The design of the anti-dislodgement components can avoid the maximum pop-up distance of the test button and prevent it from falling out.

[0030] like Figure 1 As shown, this utility model also discloses a switchgear, which includes a housing. The housing 100 includes an intermediate housing and side covers disposed on both sides of the intermediate housing. The two sides of the intermediate housing respectively form a first space for accommodating a leakage current protection module and a second space for accommodating a circuit breaker module. The leakage current testing mechanism described above is provided in the first space. The two spaces respectively house modules with different functions, and the leakage current testing mechanism disclosed in this application is disposed in the first space for testing the leakage current protection module.

[0031] Furthermore, a pressure plate 500 is provided on the intermediate housing. The pressure plate divides the first space into an independent test space. The pressure plate is interference-fitted with the intermediate housing to achieve a fixed connection. The pressure plate 500 and the intermediate housing form an installation space for the test button 200.

[0032] One side of the test button 200 is in contact with one surface of the pressure plate 500. At the same time, one side of the pressure plate is provided with a guide groove 510, and the top pressing part of the test button is placed in the guide groove and can slide relative to the guide groove. The guide groove and the top pressing part are used to guide the test button.

[0033] The embodiments should not be regarded 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. A leakage current testing mechanism, characterized in that: It includes: The test button (200) can move along the height direction of the housing (100) under the action of external force; The power-taking torsion spring (300) includes a torsion spring body (310) fixedly disposed in the housing (100), having a first elastic arm (330) and a second elastic arm (320), wherein the first elastic arm (330) abuts against the test button (200), and the second elastic arm (320) extends to the stationary contact (600) and overlaps the stationary contact (600); A metal part (400) is disposed below the first elastic arm (330); The first elastic arm (330) can contact the metal part (400) when driven by the test button (200).

2. The leakage current testing mechanism according to claim 1, characterized in that: The end of the second elastic arm (320) is bent to form an overlap (321).

3. The leakage current testing mechanism according to claim 1, characterized in that: The housing (100) is provided with a stationary contact mounting bracket (110), and the stationary contact mounting bracket (110) is provided with an opening (111). The second elastic arm (320) overlaps with the stationary contact (600) through the opening (111).

4. The leakage current testing mechanism according to claim 3, characterized in that: The opening (111) has walls (112) on both sides, and a limiting groove (113) is formed between the two walls (112) to restrict the second elastic arm (320).

5. The leakage current testing mechanism according to claim 1, characterized in that: The test button (200) extends downward to form a top pressure part (210), and the bottom of the top pressure part (210) is provided with a positioning groove (211).

6. A leakage current testing mechanism according to claim 1 or 5, characterized in that: The test button (200) is provided with anti-detachment components (220) symmetrically on both sides of its bottom.

7. A switching device, characterized in that: It includes a housing, the housing (100) including an intermediate housing and side covers disposed on both sides of the intermediate housing, and the two sides of the intermediate housing respectively form a first space for accommodating a leakage current protection module and a second space for accommodating a circuit breaker module, wherein the first space is provided with a leakage current testing mechanism as described in any one of claims 1 to 6.

8. A switching device according to claim 7, characterized in that: The intermediate housing is provided with a pressure plate (500), and the pressure plate (500) and the intermediate housing form an installation space for the test button (200).

9. A switching device according to claim 8, characterized in that: The pressure plate (500) has a guide groove (510) on one side, and the top pressing part of the test button (200) and the guide groove (510) form a sliding fit.

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