Switch button of residual-current circuit breaker

Abstract

The utility model belongs to the field of residual-current circuit breakers, and particularly relates to a switch button of a residual-current circuit breaker, which comprises a residual-current circuit breaker shell, a fixed column is fixedly connected inside the residual-current circuit breaker shell, a torsion spring is sleeved on the fixed column, a button is movably arranged on the residual-current circuit breaker shell, and the button is provided with a spring. The button comprises a limiting part which is positioned in the residual-current circuit breaker shell and is matched with the torsion spring; the top of the limiting part is fixedly connected with a pressing part; the pair of limiting plates is designed at the top of the pressing part, the design protruding out of the pressing part plays a role in limiting the maximum movement stroke of the pressing part when the pressing part is pressed, and normal work of the pressing part is guaranteed; the situation that the pressing part is clamped into the shell of the residual-current circuit breaker due to overlarge pressing force or insufficient spring force is effectively prevented, the problem of fatigue or damage of the torsion spring due to overlarge pressing force is solved, and the reliability and the service life of the residual-current circuit breaker are greatly improved.

Description

Technical Field

[0001] The utility model relates to the field of leakage circuit breakers, in particular to a switch button of a leakage circuit breaker. Background Art

[0002] A circuit breaker is a switch device that can close, carry and disconnect current under normal circuit conditions, and can close, carry and disconnect current under abnormal circuit conditions within a specified time. Circuit breakers can be used to distribute electrical energy and protect power lines and motors. When they are seriously overloaded or have faults such as short circuits and undervoltage, they can automatically cut off the circuit. In the existing low-voltage electrical field, leakage circuit breakers are key equipment for circuit safety protection, and their performance stability and reliability are of vital importance. Leakage circuit breakers are usually equipped with a test button to regularly simulate leakage faults to test whether their leakage protection function is normal;

[0003] The existing leakage circuit breaker test button, the part that leaks out of the shell is usually tightly fitted with the hole on the shell. Although this design ensures the stability of the button to a certain extent, it also has some shortcomings. Specifically, when the user uses a tool (such as a screwdriver, key, etc.) to press the test button, due to the limited contact area between the tool and the button, it is easy to cause uneven or excessive pressing force, which in turn causes uneven force or overload of the spring inside the button. Long-term use may cause spring fatigue or damage. Secondly, when the spring strength is insufficiently designed or aged, the button may not be able to be fully reset after being subjected to external force, and it will be stuck in the shell after being pressed. This not only affects the normal use of the test button, but may also have an adverse effect on the overall performance of the circuit breaker. Utility Model Content

[0004] In order to compensate for the problem in the prior art that when the spring strength is insufficiently designed or aged, the button may not be able to fully reset after being acted upon by an external force, and may get stuck in the housing after being pressed, the utility model proposes a switch button for a leakage circuit breaker.

[0005] The utility model solves the technical problem by adopting a technical solution: a switch button of a leakage circuit breaker, comprising a leakage circuit breaker shell, the interior of the leakage circuit breaker shell is fixedly connected with a fixing column, and a torsion spring is sleeved on the fixing column.

[0006] A button is movably installed on the leakage circuit breaker housing, and the button includes a limiting portion located inside the leakage circuit breaker housing and matched with a torsion spring, a pressing portion is fixedly connected to the top of the limiting portion, and the pressing portion passes through the inner wall of the leakage circuit breaker housing and extends to the outside of the leakage circuit breaker housing, a pair of movable grooves are opened on the top of the pressing portion, and the interiors of the pair of movable grooves are slidably matched with limiting plates, and the top of the limiting plate and the top of the pressing portion are in the same horizontal plane.

[0007] Preferably, sliding grooves are provided on both sides of the inner wall of the movable groove, and a pair of sliding blocks are fixedly connected to the outer wall of the limiting plate, and the sliding blocks are slidably matched with the sliding grooves.

[0008] Preferably, the inner wall of the slide groove has a first friction surface, and the outer wall of the sliding block has a second friction surface, and the second friction surface cooperates with the first friction surface.

[0009] Preferably, the first friction surface is a first anti-slip pattern, the second friction surface is a second anti-slip pattern, and the first anti-slip pattern and the second anti-slip pattern are arranged alternately.

[0010] Preferably, the top of the limiting plate has a third anti-slip pattern.

[0011] Preferably, the housing of the leakage circuit breaker is positioned as a first area and a second area, an assembly opening is opened through the second area, and the assembly opening cooperates with the pressing portion.

[0012] Preferably, the bottom of the limiting portion has a semicircular groove, and the bottom of the limiting portion is provided with a pair of assembly grooves, both of which are connected to the semicircular groove, and both of which cooperate with one end of the torsion spring.

[0013] Preferably, a protrusion is fixedly connected to the top of the pressing portion in an annular shape, and the protrusion contacts the top surface of the inner wall of the leakage circuit breaker housing.

[0014] The utility model is beneficial in that:

[0015] 1. The utility model designs a pair of limit plates on the top of the pressing part. The design protruding from the pressing part plays a role in limiting the maximum movement stroke of the pressing part when the pressing part is pressed. While ensuring the normal operation of the pressing part, it effectively prevents the pressing part from being stuck in the housing of the leakage circuit breaker due to excessive pressing force or insufficient spring force, solves the problem of fatigue or damage of the torsion spring caused by excessive pressing force, and greatly improves the reliability and service life of the leakage circuit breaker.

[0016] 2. The utility model adopts the structural design of the movable groove, the sliding groove and the sliding block. During the assembly of the button, the limit plate can be slid into the movable groove for storage, so that it is convenient for the staff to pass the button through the assembly opening inside the leakage circuit breaker housing to install the button, which provides convenience for the staff's assembly work. When the assembly is completed, the limit plate can be slid out to achieve the limiting effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 Schematic diagram of the internal structure of the leakage circuit breaker;

[0019] Figure 2 It is a schematic diagram of the assembly structure of the button and the torsion spring;

[0020] Figure 3 Schematic diagram of the bottom-up structure of a button;

[0021] Figure 4 It is a schematic diagram of the assembly structure of the limiting plate;

[0022] Figure 5 for Figure 4 Schematic diagram of the local enlarged structure at point A in the middle.

[0023] In the figure: 1, leakage circuit breaker housing; 101, first area; 102, second area; 2, fixing column; 3, torsion spring; 4, button; 401, limiting portion; 4010, semicircular groove; 4011, assembly groove; 4012, protrusion; 402, pressing portion; 4020, movable groove; 4021, sliding groove; 40210, first friction surface; 4022, limiting plate; 4023, sliding block; 40230, second friction surface. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0025] The following is combined with Figure 1-5 To further explain this application in detail,

[0026] The present application embodiment discloses a switch button of a leakage circuit breaker. Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 A switch button of a leakage circuit breaker includes a leakage circuit breaker housing 1, a fixing column 2 is fixedly connected to the inside of the leakage circuit breaker housing 1, and a torsion spring 3 is sleeved on the fixing column 2.

[0027] A button 4 is movably mounted on the leakage circuit breaker housing 1, and the button 4 includes a limiting portion 401 located inside the leakage circuit breaker housing 1 and cooperating with the torsion spring 3. A pressing portion 402 is fixedly connected to the top of the limiting portion 401. The pressing portion 402 passes through the inner wall of the leakage circuit breaker housing 1 and extends to the outside of the leakage circuit breaker housing 1. A pair of movable grooves 4020 are opened on the top of the pressing portion 402. The insides of the pair of movable grooves 4020 are slidably matched with a limiting plate 4022, and the top of the limiting plate 4022 and the top of the pressing portion 402 are in the same horizontal plane.

[0028] In this embodiment, the limiting portion 401 and the pressing portion 402 are integrally formed, and the overall cross-sectional projection of the button 4 is in an inverted T shape.

[0029] Reference Figure 5 Slide grooves 4021 are provided on both sides of the inner wall of the movable groove 4020 , and a pair of sliders 4023 are fixedly connected to the outer wall of the limiting plate 4022 , and the sliders 4023 are slidably matched with the slide grooves 4021 .

[0030] By setting a slide groove 4021 in the movable groove 4020 and setting a slider 4023 on the limiting plate 4022, the slider 4023 and the slide groove 4021 can slide and cooperate to realize the movement and storage of the limiting plate 4022.

[0031] Reference Figure 5 The inner wall of the slide groove 4021 has a first friction surface 40210, and the outer wall of the slider 4023 has a second friction surface 40230. The second friction surface 40230 cooperates with the first friction surface 40210. The first friction surface 40210 is a first anti-slip pattern, and the second friction surface 40230 is a second anti-slip pattern. The first anti-slip pattern and the second anti-slip pattern are alternately arranged.

[0032] By setting the first friction surface 40210 and the second friction surface 40230, and the first friction surface 40210 and the second friction surface 40230 are staggered, when the limit plate 4022 is slid, there is a certain friction resistance, so that the limit plate 4022 will not move easily, ensuring the stability of the limit plate 4022 after movement.

[0033] Reference Figure 5 The top of the limiting plate 4022 has a third anti-slip pattern.

[0034] By providing the third anti-slip pattern, the friction with the hand can be increased, making it easier for the staff to move the limit plate 4022.

[0035] Reference Figure 1 , Figure 3 and Figure 4The housing 1 of the leakage circuit breaker is positioned as a first area 101 and a second area 102 , and an assembly opening is provided through the second area 102 , and the assembly opening cooperates with the pressing portion 402 .

[0036] By providing an assembly opening for mounting a button 4

[0037] In the present device, the button 4 is arranged in the second area 102, so that after pressing the button 4, the button 4 squeezes the torsion spring 3. When the torsion spring 3 rebounds, the distance between it and the inner wall of the shell 1 is larger than that of the traditional button 4 arranged in the first area 101, which effectively reduces the possibility of being easily broken down under the high voltage of 6000V.

[0038] Reference Figure 3 and Figure 4 The bottom of the limiting portion 401 has a semicircular groove 4010, and the bottom of the limiting portion 401 is provided with a pair of assembly grooves 4011, both of which are connected to the semicircular groove 4010, and both of which cooperate with one end of the torsion spring 3.

[0039] By providing the assembly groove 4011 for connecting with the end of the torsion spring 3 , the end of the torsion spring 3 is well limited, ensuring smooth pressing operation of the button 4 .

[0040] Reference Figure 3 and Figure 4 The top of the pressing portion 402 is fixedly connected with a protrusion 4012 in a ring shape, and the protrusion 4012 contacts the top surface of the inner wall of the leakage circuit breaker housing 1.

[0041] By providing the protrusion 4012 , when the button 4 rebounds, the protrusion 4012 collides with the inner wall of the housing 1 , thereby protecting the button 4 . The protrusion 4012 can be made of elastic material.

[0042] Working principle: When in use, the pressing part 402 is extended from the assembly opening inside the leakage circuit breaker housing 1, the limiting part 401 is installed in cooperation with the torsion spring 3, and then the other structural parts in the leakage circuit breaker housing 1 are assembled, and the sliding limiting plate 4022 makes it slide out from the movable groove 4020. When pressing the pressing part 402, after pressing to the maximum stroke of the pressing part 402, the limiting plate 4022 contacts the outer surface of the leakage circuit breaker housing 1, while ensuring the normal operation of the pressing part 402, it effectively prevents the pressing part 402 from being stuck in the inside of the leakage circuit breaker housing 1 due to excessive pressing pressure or insufficient spring force, solves the problem of fatigue or damage of the torsion spring 3 caused by excessive pressing pressure, and greatly improves the reliability and service life of the leakage circuit breaker.

[0043] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments, and the above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, and these changes and improvements fall within the scope of the utility model to be protected.

Claims

1. A switch button of a leakage circuit breaker, comprising a leakage circuit breaker housing (1), a fixing column (2) fixedly connected to the inside of the leakage circuit breaker housing (1), a torsion spring (3) sleeved on the fixing column (2), characterized in that: A button (4) is movably mounted on the leakage circuit breaker housing (1), the button (4) comprising a limiting portion (401) located inside the leakage circuit breaker housing (1) and cooperating with the torsion spring (3), a pressing portion (402) being fixedly connected to the top of the limiting portion (401), the pressing portion (402) passing through the inner wall of the leakage circuit breaker housing (1) and extending to the outside of the leakage circuit breaker housing (1), a pair of movable grooves (4020) being provided on the top of the pressing portion (402), the insides of the pair of movable grooves (4020) both being slidably engaged with a limiting plate (4022), the top of the limiting plate (4022) and the top of the pressing portion (402) being in the same horizontal plane.

2. The switch button of a leakage circuit breaker according to claim 1, characterized in that: Slide grooves (4021) are provided on both sides of the inner wall of the movable groove (4020), and a pair of sliding blocks (4023) are fixedly connected to the outer wall of the limiting plate (4022), and the sliding blocks (4023) are slidably matched with the slide grooves (4021).

3. The switch button of a leakage circuit breaker according to claim 2, characterized in that: The inner wall of the slide groove (4021) has a first friction surface (40210), and the outer wall of the slider (4023) has a second friction surface (40230), and the second friction surface (40230) cooperates with the first friction surface (40210).

4. The switch button of a leakage circuit breaker according to claim 3, characterized in that: The first friction surface (40210) is a first anti-slip pattern, the second friction surface (40230) is a second anti-slip pattern, and the first anti-slip pattern and the second anti-slip pattern are arranged alternately.

5. The switch button of a leakage circuit breaker according to claim 2, characterized in that: The top of the limiting plate (4022) has a third anti-slip pattern.

6. The switch button of a leakage circuit breaker according to claim 1, characterized in that: The residual current circuit breaker housing (1) is positioned as a first area (101) and a second area (102), and an assembly opening is provided through the second area (102), and the assembly opening cooperates with the pressing portion (402).

7. The switch button of a leakage circuit breaker according to claim 1, characterized in that: The bottom of the limiting portion (401) is provided with a semicircular groove (4010), and the bottom of the limiting portion (401) is provided with a pair of assembly grooves (4011), both of which are connected to the semicircular groove (4010), and both of which are matched with one end of the torsion spring (3).

8. The switch button of a leakage circuit breaker according to claim 1, characterized in that: A protrusion (4012) is fixedly connected to the top of the pressing portion (402) in an annular shape, and the protrusion (4012) contacts the top surface of the inner wall of the residual current circuit breaker housing (1).

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