Test button structure of circuit breaker and circuit breaker

Abstract

The utility model belongs to the technical field of low-voltage electric appliances, and particularly discloses a test button structure of a circuit breaker and the circuit breaker. According to the test button structure of the circuit breaker, when the electric leakage function of the circuit breaker is tested, the test button is pressed to be in a first state, the first lap joint portion abuts against the first end of the elastic piece, the first end of the elastic piece makes contact with the second lap joint portion, the first elastic piece and the second elastic piece are communicated through the elastic piece, and a test loop is switched on; the electric leakage opening function of the circuit breaker can be tested; in order to avoid the problem that the electromagnetic coil is burnt out due to the fact that the test button is pressed for a long time to enable the test loop to be conducted all the time due to the fact that installation or operation personnel are lack of related knowledge, the test button is continuously pressed to the second state on the basis of the first state; the second lap joint part and the first lap joint part are matched to separate the first end of the elastic piece from the second lap joint part, the test loop is disconnected, the test loop is prevented from being conducted all the time, and the electromagnetic coil is protected.

Description

Technical Field

[0001] The utility model relates to the technical field of low-voltage electrical appliances, in particular to a test button structure of a circuit breaker and the circuit breaker. Background Art

[0002] With the development of the low-voltage electrical equipment industry, leakage current circuit breakers (RCBs), as a crucial component of low-voltage electrical equipment, are becoming increasingly widespread. Conventional electronic RCBs draw power from the incoming line. When leakage occurs, the vector sum of the currents flowing through the zero-sequence transformer is not equal to zero. This current is sensed by the transformer and outputs a signal on the secondary side. When the vector sum of the leakage current exceeds the set value, the secondary side of the RCB outputs a sufficient signal, which, after filtering and amplification, activates the trip mechanism. The trip mechanism's moving iron core drives the circuit breaker to open the circuit, protecting the circuit and personnel and equipment. However, in some special situations where circuit breaker wiring is reversed, the breaker's leakage current circuit board remains powered even when the circuit breaker is tripped. Due to lack of knowledge by the installer or operator, prolonged pressing of the test button can cause the test circuit to remain open, resulting in a continuous trip current in the electromagnetic release circuit, which can burn out the electromagnetic coil. Alternatively, if the circuit breaker is properly wired and a leakage current exists but the circuit breaker does not trip, prolonged pressing of the test button can also burn out the electromagnetic coil. Utility Model Content

[0003] The purpose of the utility model is to provide a test button structure of a circuit breaker and a circuit breaker, which solves the problem that the electromagnetic coil of an electromagnetic release is burned out due to pressing the test button for a long time.

[0004] To achieve this purpose, the present invention adopts the following technical solutions:

[0005] In a first aspect, a test button structure of a circuit breaker is provided, comprising:

[0006] shell;

[0007] A test button is provided in the housing, and a first overlapping portion is provided on the test button;

[0008] an elastic member disposed in the housing, wherein a first end of the elastic member is overlapped on the first overlapping portion;

[0009] a first elastic piece, disposed in the housing, wherein a first end of the first elastic piece is connected to the housing, and a second end of the first elastic piece is connected to the second end of the elastic member;

[0010] a second elastic piece disposed in the housing, wherein a first end of the second elastic piece is connected to the housing, and a second end of the second elastic piece is provided with a second overlapping portion;

[0011] When the test button is pressed and in the first state, the first overlapping portion presses against the first end of the elastic member so that the first end of the elastic member contacts the second overlapping portion;

[0012] When the test button is continuously pressed in the second state based on the first state, the first overlapping portion and the second overlapping portion cooperate to separate the first end of the elastic member from the second overlapping portion.

[0013] As an optional technical solution to the test button structure of the above-mentioned circuit breaker, the test button includes a pressing portion and a rod portion, the first end of the pressing portion is exposed from the housing, the second end of the pressing portion is connected to the first end of the rod portion, and the second end of the rod portion is provided with the first overlapping portion.

[0014] As an optional technical solution to the test button structure of the above-mentioned circuit breaker, the first overlapping portion includes an avoidance groove and a pressing groove provided at the second end portion of the rod portion, and the avoidance groove and the pressing groove are connected through a guide surface. When the test button is in a first state, the first end of the elastic member overlaps the pressing groove, and the first end of the elastic member contacts the second overlapping portion. When the test button is in a second state, the first end of the elastic member can be placed in the avoidance groove through the guide surface, and the first end of the elastic member is separated from the second overlapping portion.

[0015] As an optional technical solution to the test button structure of the above-mentioned circuit breaker, the depth of the avoidance groove from the second end of the rod to the first end is greater than the depth of the pressing groove from the second end of the rod to the first end. The avoidance groove forms an L-shaped structure at the second end of the rod, and the pressing groove is formed on one side of the second end of the rod close to the avoidance groove. The guide surface connects the bottom of the pressing groove and the side wall of the avoidance groove.

[0016] As an optional technical solution to the test button structure of the above-mentioned circuit breaker, the second overlapping portion includes an inclined surface arranged at the second end of the second elastic piece, and the inclined surface is inclined from the second end of the second elastic piece toward the first end. When the test button is in the first state, the first end of the elastic member contacts the inclined surface. When the test button is in the second state, the inclined surface cooperates with the first overlapping portion to separate the first end of the elastic member from the inclined surface.

[0017] As an optional technical solution to the above-mentioned test button structure of the circuit breaker, the second end of the second elastic piece extends toward the first end and is provided with a notch, the inclined surface extends to the notch, and the notch is used to avoid the first end of the elastic member being separated from the inclined surface.

[0018] As an optional technical solution to the test button structure of the above-mentioned circuit breaker, a reset member is provided in the housing, and the reset member is respectively connected to the housing and the test button. The reset member is configured to reset the test button from the second state to the initial state, and the second end of the elastic member is reset to the initial position where it overlaps with the first overlapping portion.

[0019] As an optional technical solution to the test button structure of the above-mentioned circuit breaker, a guide portion is provided on the housing. When the second end of the elastic member is reset, the guide portion is configured to reset the second end of the elastic member to an initial position where it overlaps with the first overlapping portion.

[0020] As an optional technical solution to the test button structure of the circuit breaker, the elastic member is a torsion spring, a mounting boss is provided in the housing, and the torsion spring is sleeved on the mounting boss.

[0021] In a second aspect, a circuit breaker is provided, comprising the test button structure of the circuit breaker described in any one of the above.

[0022] Beneficial effects of the utility model:

[0023] The test button structure of the circuit breaker provided by the present invention is such that when testing the leakage function of the circuit breaker, the test button is pressed to put the test button in a first state, the first overlapping portion presses against the first end of the elastic member, causing the first end of the elastic member to contact the second overlapping portion, and the first spring sheet and the second spring sheet are connected through the elastic member, connecting the test circuit, thereby testing the leakage tripping function of the circuit breaker. To avoid the problem that the test circuit is always on due to the lack of relevant knowledge of the installer or operator, causing the electromagnetic coil to burn out due to prolonged pressing of the test button, the test button of the present invention is further pressed to the second state based on the first state, and the second overlapping portion cooperates with the first overlapping portion to separate the first end of the elastic member from the second overlapping portion, disconnecting the test circuit, preventing the test circuit from being always on, and protecting the electromagnetic coil. The test button of the circuit breaker provided by the present invention has a simple structure, low cost, and high stability in use. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a partial structural diagram of a circuit breaker provided by an embodiment of the present utility model;

[0025] Figure 2 yes Figure 1 A local enlarged structural diagram of point A;

[0026] Figure 3 This is a structural diagram of the test button provided by an embodiment of the present utility model in a first state;

[0027] Figure 4This is a structural diagram of the test button provided by an embodiment of the present utility model in the second state;

[0028] Figure 5 This is a schematic structural diagram of a test button provided in an embodiment of the present utility model;

[0029] Figure 6 This is a schematic structural diagram of a second spring provided in an embodiment of the present utility model;

[0030] Figure 7 This is a structural diagram of the test button provided by an embodiment of the present utility model in an initial state;

[0031] Figure 8 It is a structural schematic diagram of the guide part provided by an embodiment of the utility model.

[0032] In the picture:

[0033] 1. Housing; 2. Test button; 3. Elastic member; 4. First spring piece; 5. Second spring piece; 6. Reset member; 7. Guide portion;

[0034] 11. Install the boss;

[0035] 21. First overlapping portion; 211. Avoidance groove; 212. Pressing groove; 213. Guide surface; 22. Pressing portion; 23. Rod portion;

[0036] 51. Second overlapping portion; 511. Inclined surface; 512. Notch;

[0037] 71. Guide block; 72. Guide ramp. DETAILED DESCRIPTION

[0038] The present invention will be further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are intended only to illustrate the present invention and are not intended to limit the present invention. It should also be noted that, for ease of description, the accompanying drawings only illustrate portions relevant to the present invention, not all of its components.

[0039] In the description of this utility model, unless otherwise specified or limited, the terms "connected," "connect," and "fixed" should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0040] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Moreover, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0041] In the description of this embodiment, the terms "upper," "lower," "right," and other orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely for ease of description and simplified operation. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention. Furthermore, the terms "first" and "second" are used solely for descriptive purposes and have no special meaning.

[0042] like Figure 1 As shown, this embodiment provides a circuit breaker with a leakage protection function. The circuit breaker includes a test button structure, which includes a housing 1 and a test button 2. Test button 2 is disposed in housing 1 and can be pressed. During use of the circuit breaker, the user is required to periodically press test button 2 to detect whether the circuit breaker can trip due to leakage.

[0043] like Figures 2 to 4 As shown, the test button structure provided in this embodiment also includes an elastic member 3, a first elastic piece 4 and a second elastic piece 5. The elastic member 3, the first elastic piece 4 and the second elastic piece 5 are all arranged in the shell 1. A first overlapping portion 21 is provided on the test button 2, and the first end of the elastic member 3 overlaps the first overlapping portion 21. The first end of the first elastic piece 4 is connected to the shell 1, and the second end of the first elastic piece 4 is connected to the second end of the elastic member 3. The first end of the second elastic piece 5 is connected to the shell 1, and the second end of the second elastic piece 5 is provided with a second overlapping portion 51. When the test button 2 is pressed and is in the first state, the first overlapping portion 21 presses against the first end of the elastic member 3 so that the first end of the elastic member 3 contacts the second overlapping portion 51. When the test button 2 is continued to be pressed in the second state on the basis of the first state, the first overlapping portion 21 and the second overlapping portion 51 cooperate to separate the first end of the elastic member 3 from the second overlapping portion 51.

[0044] When testing the leakage function of the circuit breaker, the test button 2 is pressed to put the test button 2 in the first state, the first overlapping portion 21 presses against the first end of the elastic member 3, so that the first end of the elastic member 3 contacts the second overlapping portion 51, and the first spring piece 4 and the second spring piece 5 are connected through the elastic member 3, connecting the test circuit, and the leakage tripping function of the circuit breaker can be tested. In order to avoid the problem that the test circuit is always turned on due to the lack of relevant knowledge of the installer or operator, the test button 2 in this embodiment is further pressed to the second state based on the first state. The second overlapping portion 51 and the first overlapping portion 21 cooperate to separate the first end of the elastic member 3 from the second overlapping portion 51, disconnecting the test circuit, preventing the test circuit from being always turned on, and protecting the electromagnetic coil. The test button 2 of the circuit breaker provided in this embodiment has a simple structure, low cost, and high stability in use.

[0045] Optionally, the elastic member 3 is a torsion spring, a mounting boss 11 is provided in the housing 1 , and the elastic member 3 is sleeved on the mounting boss 11 , thereby achieving fixed installation of the elastic member 3 .

[0046] Combine Figure 3 、 Figure 4 and Figure 5 As shown, in some embodiments, the test button 2 includes a pressing portion 22 and a rod portion 23, and the outer diameter of the rod portion 23 is smaller than the outer diameter of the pressing portion 22. The first end of the pressing portion 22 is exposed to the housing 1 to facilitate the pressing operation. The second end of the pressing portion 22 is connected to the first end of the rod portion 23, and the second end of the rod portion 23 is provided with a first overlapping portion 21. The pressing portion 22 is pressed, driving the rod portion 23 to move, so that the first overlapping portion 21 presses against the first end of the elastic member 3. A sliding channel is provided on the housing 1, and the sliding channel passes through the side wall of the housing 1 to facilitate the installation of the test button 2 and provide a guide for the sliding of the test button 2.

[0047] Further optionally, the first overlapping portion 21 includes an escape groove 211 and a pressing groove 212 disposed at the second end of the rod portion 23. The escape groove 211 and the pressing groove 212 are connected via a guide surface 213. When the test button 2 is in the first state, the first end of the elastic member 3 overlaps within the pressing groove 212 and contacts the second overlapping portion 51. When the test button 2 is in the second state, the first end of the elastic member 3 can be placed within the escape groove 211 via the guide surface 213, and the first end of the elastic member 3 is separated from the second overlapping portion 51. In the initial state where the test button 2 is not pressed, the first end of the elastic member 3 overlaps within the pressing groove 212, specifically, the first end of the elastic member 3 abuts the bottom of the pressing groove 212. When the test button 2 is pressed to the first state, the bottom of the pressing groove 212 applies a force to the first end of the elastic member 3, causing the first end of the elastic member 3 to contact the second overlapping portion 51 of the second spring 5. When the test button 2 is continuously pressed to switch the test button 2 from the first state to the second state, the first end of the elastic member 3 disengages from the pressing groove 212 and slides into the avoidance groove 211 through the guide surface 213, and the first end of the elastic member 3 is separated from the second overlapping portion 51. The avoidance groove 211 is provided to avoid the first end of the elastic member 3, thereby realizing effective separation of the first end of the elastic member 3 and the second overlapping portion 51.

[0048] Optionally, the connection between the guide surface 213 and the avoidance groove 211 and the pressing groove 212 are all arc transitions to ensure that the first end of the elastic member 3 can smoothly enter the avoidance groove 211, avoiding the first end of the elastic member 3 from getting stuck and failing to ensure that the test circuit is disconnected in time.

[0049] The depth of the avoidance groove 211, which is recessed from the second end of the rod 23 to the first end, is greater than the depth of the pressing groove 212, which is recessed from the second end of the rod 23 to the first end. The avoidance groove 211 forms an L-shaped structure at the second end of the rod 23. A pressing groove 212 is recessed on one side of the second end of the rod 23 near the avoidance groove 211. The guide surface 213 connects the bottom of the pressing groove 212 and the sidewall of the avoidance groove 211. The first end of the elastic member 3 abuts the bottom of the pressing groove 212. When the test button 2 is pressed, the first end of the elastic member 3 can slide smoothly and quickly into the avoidance groove 211, protecting the electromagnetic coil from damage while also achieving instantaneous conduction of the test circuit.

[0050] In some other embodiments, the first overlapping portion 21 can also be other structures. For example, the end face of the second end of the rod portion 23 is set to a wavy surface, which can not only play the role of pressing or avoiding the first end of the elastic member 3, but also enable the elastic member 3 to move smoothly between the pressed position and the avoiding position.

[0051] Reference Figure 3 、 Figure 4 and Figure 6As shown, in some embodiments, the second overlapping portion 51 includes a sloped surface 511 disposed at the second end of the second elastic piece 5. The sloped surface 511 is inclined from the second end toward the first end of the second elastic piece 5. When the test button 2 is in the first state, the first end of the elastic member 3 contacts the sloped surface 511. Continued pressing of the test button 2, when the test button 2 is in the second state, the engagement of the sloped surface 511 with the first overlapping portion 21 causes the first end of the elastic member 3 to separate from the sloped surface 511, allowing the first end of the elastic member 3 to move along the sloped surface 511 until it is free of the sloped surface 511.

[0052] Based on the structure of the first overlapping portion 21 described above, when the test button 2 is in the first state, the first end of the elastic member 3 is placed in the pressing groove 212. As the test button 2 continues to be pressed, the first end of the elastic member 3 moves along the inclined surface 511 until it is separated from the inclined surface 511. After the first end of the elastic member 3 loses the pressure of the inclined surface 511, the first end of the elastic member 3 slides into the avoidance groove 211 due to its own torque, thereby achieving the separation of the first end of the elastic member 3 from the second elastic piece 5. It should be further explained that the axial direction of the test button 2 is the same as the direction in which the second elastic piece 5 extends from the first end to the second end. When the test button 2 is pressed, the first end of the elastic member 3 can slide along the inclined surface 511 and simultaneously move from the pressing groove 212 to the avoidance groove 211.

[0053] Optionally, the second end of the second elastic piece 5 extends toward the first end and is provided with a notch 512, and the inclined surface 511 extends to the notch 512, and the notch 512 is used to avoid the first end of the elastic member 3 separated from the inclined surface 511 to ensure that the first end of the elastic member 3 can be smoothly separated from the inclined surface 511.

[0054] The second elastic piece 5 is L-shaped, the horizontal plate of the second elastic piece 5 is fixed to the housing 1 , the vertical plate of the second elastic piece 5 is arranged along the axial direction of the test button 2 , and the inclined surface 511 and the notch 512 are arranged at the ends of the vertical plate of the second elastic piece 5 .

[0055] like Figure 5 and Figure 7 As shown, when no test is required or after the test is completed, no force is applied to the test button 2, then the test button 2 needs to be reset. Therefore, a reset member 6 is provided in the housing 1, and the reset member 6 is connected to the housing 1 and the test button 2, respectively. The reset member 6 is configured to reset the test button 2 from the second state to the initial state, and the second end of the elastic member 3 is reset to the initial position overlapping with the first overlapping portion 21. Optionally, the reset member 6 includes a reset spring, which is sleeved on the rod portion 23 of the test button 2, one end of the reset spring abuts against the pressing portion 22 of the test button 2, and the other end of the reset spring abuts against the housing 1. When the test button 2 is pressed, the reset spring is compressed, and when no pressing force is applied to the test button 2, the reset spring resets and drives the test button 2 to reset.

[0056] Further optionally, combined with Figure 2 and Figure 8 As shown, the housing 1 is provided with a guide portion 7. When the second end of the elastic member 3 is reset, the guide portion 7 is configured to reset the second end of the elastic member 3 to its initial position where it overlaps with the first overlapping portion 21. The provision of the guide portion 7 ensures that the second end of the elastic member 3 can be reset to its initial position where it overlaps with the first overlapping portion 21, thereby preventing the second end of the elastic member 3 from deviating during the reset process. The guide portion 7 serves as a guide and limiter.

[0057] The guide portion 7 includes a guide block 71 disposed on the inner side of the housing 1. The guide block 71 is provided with a guide bevel 72. The second end of the elastic member 3 is positioned between the second spring plate 5 and the guide bevel 72, and the test button 2 is positioned between the second spring plate 5 and the guide bevel 72. When no force is applied to the test button 2, the test button 2 does not restrict the second end of the elastic member 3. The second end of the elastic member 3 moves toward the side away from the second spring plate 5 under the action of its own torsional force. The second end of the elastic member 3 then contacts the guide bevel 72 and, guided by the guide bevel 72, returns to its initial position where it overlaps with the first overlapping portion 21. The guide bevel 72 guides and limits the return of the second end of the elastic member 3.

[0058] The circuit breaker provided in this embodiment also includes a tripping mechanism, a contact assembly, a zero-sequence mutual inductor and other components, which are all existing technologies and will not be described in detail here.

[0059] Obviously, the above-described embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention and are not intended to limit the manner in which the present invention is to be implemented. A person skilled in the art would be able to make various obvious changes, readjustments, and substitutions without departing from the scope of protection of the present invention. It is not necessary and impossible to enumerate all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the claims of the present invention.

Claims

1. The test button structure of the circuit breaker is characterized by: include: Housing (1); A test button (2) is arranged in the housing (1), and a first overlapping portion (21) is provided on the test button (2); An elastic member (3) is disposed in the housing (1), and a first end of the elastic member (3) is overlapped on the first overlap portion (21); A first elastic piece (4) is arranged in the housing (1), a first end of the first elastic piece (4) is connected to the housing (1), and a second end of the first elastic piece (4) is connected to the second end of the elastic member (3); A second elastic piece (5) is arranged in the housing (1), a first end of the second elastic piece (5) is connected to the housing (1), and a second end of the second elastic piece (5) is provided with a second overlapping portion (51); When the test button (2) is pressed and in the first state, the first overlapping portion (21) presses against the first end of the elastic member (3), so that the first end of the elastic member (3) contacts the second overlapping portion (51); When the test button (2) is continuously pressed in the second state based on the first state, the first overlapping portion (21) and the second overlapping portion (51) cooperate to separate the first end of the elastic member (3) from the second overlapping portion (51).

2. The test button structure of the circuit breaker according to claim 1, characterized in that: The test button (2) comprises a pressing portion (22) and a rod portion (23); a first end of the pressing portion (22) is exposed from the housing (1); a second end of the pressing portion (22) is connected to the first end of the rod portion (23); and the second end of the rod portion (23) is provided with the first overlapping portion (21).

3. The test button structure of the circuit breaker according to claim 2, characterized in that: The first overlapping portion (21) comprises an avoidance groove (211) and a pressing groove (212) arranged at the second end portion of the rod portion (23); the avoidance groove (211) and the pressing groove (212) are connected through a guide surface (213); when the test button (2) is in the first state, the first end of the elastic member (3) is overlapped in the pressing groove (212), and the first end of the elastic member (3) is in contact with the second overlapping portion (51); when the test button (2) is in the second state, the first end of the elastic member (3) can be placed in the avoidance groove (211) through the guide surface (213), and the first end of the elastic member (3) is separated from the second overlapping portion (51).

4. The test button structure of the circuit breaker according to claim 3, characterized in that: The depth of the avoidance groove (211) from the second end of the rod portion (23) to the first end is greater than the depth of the pressing groove (212) from the second end of the rod portion (23) to the first end. The avoidance groove (211) forms an L-shaped structure at the second end of the rod portion (23). The second end of the rod portion (23) is recessed on one side close to the avoidance groove (211) to form the pressing groove (212). The guide surface (213) connects the bottom of the pressing groove (212) and the side wall of the avoidance groove (211).

5. The test button structure of the circuit breaker according to any one of claims 1 to 4, characterized in that: The second overlapping portion (51) includes an inclined surface (511) arranged at the second end of the second elastic piece (5), and the inclined surface (511) is inclined from the second end of the second elastic piece (5) to the first end. When the test button (2) is in the first state, the first end of the elastic member (3) contacts the inclined surface (511). When the test button (2) is in the second state, the inclined surface (511) cooperates with the first overlapping portion (21) to separate the first end of the elastic member (3) from the inclined surface (511).

6. The test button structure of the circuit breaker according to claim 5, characterized in that: The second end of the second elastic piece (5) extends in the direction of the first end and is provided with a notch (512), the inclined surface (511) extends to the notch (512), and the notch (512) is used to avoid the first end of the elastic member (3) being separated from the inclined surface (511).

7. The test button structure of a circuit breaker according to any one of claims 1 to 4, characterized in that: A reset member (6) is provided in the housing (1), and the reset member (6) is connected to the housing (1) and the test button (2) respectively. The reset member (6) is configured to reset the test button (2) from a second state to an initial state, and the second end of the elastic member (3) is reset to an initial position where it overlaps with the first overlapping portion (21).

8. The test button structure of the circuit breaker according to claim 7, characterized in that: The housing (1) is provided with a guide portion (7), and when the second end of the elastic member (3) is reset, the guide portion (7) is configured to reset the second end of the elastic member (3) to an initial position where it overlaps with the first overlapping portion (21).

9. The test button structure of a circuit breaker according to any one of claims 1 to 4, characterized in that: The elastic member (3) is a torsion spring, a mounting boss (11) is provided in the housing (1), and the torsion spring is sleeved on the mounting boss (11).

10. A circuit breaker, characterized in that A test button structure for a circuit breaker comprising the structure described in any one of claims 1 to 9.

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