Thermal relay auxiliary mechanism system

Abstract

A thermal relay auxiliary mechanism system, comprising a base, a thermal element mounted on the base, a tripping mechanism, a push rod, a stop button, a normally closed contact and a normally open contact, wherein the thermal element cooperates with the tripping mechanism and can drive the push rod by means of the tripping mechanism to trip the thermal relay; the push rod is arranged to move to the left and right and cooperates with both the normally closed contact and the normally open contact, enabling simultaneous driving of the normally closed contact and the normally open contact to switch the states thereof; the stop button is arranged to move up and down and has an initial position, a stop position and a test position; when in the stop position, the stop button cooperates with the normally closed contact to drive the normally closed contact to open; and when in the test position, the stop button directly drives the push rod, causing the push rod to drive the normally closed contact to open and at the same time drive the normally open contact to close. The thermal relay auxiliary mechanism system of the present invention integrates both stop and test functions into the same stop button for operation; moreover, the stop button directly drives the push rod to realize the test function, thereby reducing transmission, simplifying the action relationship, and improving the reliability of the test function.

Description

Thermostat auxiliary mechanism system

[0001] The present application claims priority to Chinese Patent Application No. 202410830593.8, filed on June 25, 2024, the entire contents of which are incorporated herein by reference. TECHNICAL FIELD

[0002] The present application relates to the field of low-voltage electrical apparatus, in particular to a thermostat auxiliary mechanism system. BACKGROUND

[0003] A thermal overload relay is a commonly used relay. A bimetallic strip is connected in series in a main circuit controlled by the thermal overload relay. When the current in the main circuit flowing through the bimetallic strip is less than or equal to the rated current, the bimetallic strip is heated to a certain bending stroke, but it is not enough to push the reset action mechanism of the thermal overload relay to act, so as to ensure the normal starting and running of the load (such as a motor). When an overload current (greater than the rated current) or a broken-phase anomaly occurs in the main circuit, the bimetallic strip is heated to a larger bending stroke and is enough to push the action mechanism of the thermal overload relay to produce a tripping action. In this way, the principle of thermal element (such as bimetallic strip) being heated and bent to deform is used to control the connection and disconnection of the electrical device circuit, and to achieve overload protection.

[0004] During installation, debugging and actual operation of the thermal relay, stopping operation or test operation is required. The existing auxiliary mechanism system of the thermal relay is provided with a stop button and a test button on the operation panel of the thermal relay. The test operation needs to be implemented by using a special tool to press the test button in the operation hole. This has the problems of complex operation and excessive force, which can easily cause the test button to be deformed and stuck.

[0005] In addition, the contact of the auxiliary mechanism is a round rivet point, which is easily contaminated during riveting and assembling, and the cleanliness of the contact cannot be guaranteed, which makes it difficult to meet the use requirements of low-voltage micro-current scenes such as PLC direct connection. SUMMARY

[0006] The present application aims to overcome at least one of the defects of the prior art and provide a thermostat auxiliary mechanism system.

[0007] To achieve the above-mentioned purpose, the present application adopts the following technical solutions:

[0008] The thermal relay auxiliary mechanism system comprises a base, a thermal element installed on the base, a tripping mechanism, a push rod, a stop button, a normally closed contact and a normally open contact, the thermal element is matched with the tripping mechanism, the push rod can be driven by the tripping mechanism to trip the thermal relay, the push rod is arranged to move left and right and is matched with the normally closed contact and the normally open contact, the push rod can drive the normally closed contact and the normally open contact to switch states at the same time, the stop button is arranged to move up and down and has an initial position, a stop position and a test position, the stop button is matched with the normally closed contact to drive the normally closed contact to break when the stop button is at the stop position, the stop button directly drives the push rod to drive the normally closed contact to break and the normally open contact to close when the stop button is at the test position.

[0009] Optionally, the stop button is provided with a first driving part, and the push rod is provided with a first driven part opposite to the first driving part, the first driving part and the first driven part are drivingly matched when the stop button is at the test position.

[0010] Optionally, the first driving part is formed on one side of the stop button away from the tripping mechanism and protrudes in the left-right direction, and the first driven part is formed on one side of the push rod facing the stop button and protrudes in the front-back direction.

[0011] Optionally, the first driven part has a first driven surface facing the first driving part, and the first driven surface is a plane perpendicular to the moving direction of the push rod, and the first driving part has a first driving surface opposite to the first driven surface, and the first driving surface is arranged to be inclined, so that the first driven part is driven to move away from the stop button during the movement of the stop button from the stop position to the test position.

[0012] Optionally, the initial position, the stop position and the test position are arranged in sequence.

[0013] Optionally, the normally closed contact comprises a moving part and a static part arranged oppositely, and the moving part is arranged on a moving part supporting member, the normally open contact comprises a moving part and a static part arranged oppositely, and the moving part is arranged on a moving part supporting member, and the push rod is drivingly matched with the moving part supporting member and the moving part supporting member.

[0014] Optionally, the moving part and the static part of the normally open contact are both in the shape of a strip block, and the moving part and the static part of the normally closed contact are both in the shape of a strip block.

[0015] Optionally, the moving part and the static part of the normally closed contact are cross-shaped and matched, and the moving part and the static part of the normally open contact are cross-shaped and matched.

[0016] Optionally, the base is provided with two limiting parts on the upper side and the lower side of the push rod, and the push rod is limited between the two limiting parts.

[0017] Optionally, the stop button is provided with a convex cam on the side facing the normally closed contact, for cooperating with the transmission part of the normally closed contact in the stop position.

[0018] Optionally, the tripping mechanism comprises a rocker arm, a tension spring and a tripping swing lever; the thermal element is in driving cooperation with the tripping swing lever, the tripping swing lever is coupled to the base through a first fulcrum and can swing around the rotation center of the first fulcrum; the rocker arm is coupled to the base through a second fulcrum and can swing around the rotation center of the second fulcrum; one end of the tension spring is coupled to the tripping swing lever, the other end of the tension spring is connected to the rocker arm, and the rocker arm is coupled to the push rod.

[0019] The auxiliary mechanism system of the thermal relay of the present application realizes the integration of the stop and test functions of the auxiliary mechanism system into the operation of the same stop button, reduces the difficulty of use, is simple to operate, cancels the test button to effectively avoid the risk of the test button of the original mechanism system being prone to jamming, and directly drives the push rod to realize the test function, reduces transmission, simplifies the action relationship, and improves the reliability of the test function.

[0020] In addition, the initial position, the stop position and the test position of the stop button are sequentially arranged, and the stop button can be switched from the stop position to the test position to continuously perform the stop function and the test function of the thermal relay.

[0021] In addition, the moving and static contacts are in a strip block structure, which can realize silver wire or silver strip feeding, automatic online welding or riveting, online shaping and other production processes, has efficient production, and can avoid silver point pollution problems in the production process.

[0022] In addition, the moving and static contacts are in a strip block structure, which can realize silver wire or silver strip feeding, automatic online welding or riveting, online shaping and other production processes, has efficient production, and can avoid silver point pollution problems in the production process. BRIEF DESCRIPTION OF DRAWINGS

[0023] Fig. 1 is a front view of the auxiliary mechanism system of the thermal relay of the embodiment one of the present application;

[0024] Fig. 2 is a structural schematic view of the stop button of the embodiment one of the present application;

[0025] Fig. 3 is a front view of the auxiliary mechanism system of the thermal relay of the embodiment two of the present application;

[0026] Fig. 4 is a structural schematic view of the stop button of the embodiment two of the present application;

[0027] Fig. 5 is a structural schematic view of the tripping swing lever of the embodiment two of the present application;

[0028] Fig. 6 is a structural schematic view of the base of the present application;

[0029] Fig. 7 is a back perspective view of the thermal relay auxiliary mechanism system of the present application;

[0030] Fig. 8 is a back view of the thermal relay auxiliary mechanism system of the present application;

[0031] Fig. 9 is an enlarged view of A in Fig. 8 of the present application;

[0032] Fig. 10 is an enlarged view of B in Fig. 8 of the present application;

[0033] Fig. 11 is a structural schematic view of the moving-moving contact / moving-making contact of the present application;

[0034] Fig. 12 is a structural schematic view of the moving-breaking contact / moving-making contact of the present application.

[0035] Base 1; limit portion 11; rocker rib 12; stop button 2; first driving portion 21; first driven surface 511; second driving portion 22; second driving surface 221; cam 23; mounting post 24; normally closed contact 3; moving-breaking contact 31; moving-moving contact 32; moving-breaking contact support 33; transmission portion 331; normally open contact 4; moving-making contact 41; moving-moving contact 42; moving-making contact support 43; push rod 5; first driven portion 51; first driven surface 511; tripping swing lever 6; second driven portion 61; second driven surface 611; first fulcrum 62; rocker 7; second fulcrum 71; tension spring 8; return spring 9. DETAILED DESCRIPTION

[0036] The following embodiments, given in conjunction with the accompanying drawings, further illustrate the specific embodiments of the thermal relay auxiliary mechanism system of the present application. The thermal relay auxiliary mechanism system of the present application is not limited to the description of the following embodiments.

[0037] As shown in FIG. 1, FIG. 3 and FIG. 7, the thermal relay auxiliary mechanism system of the embodiment comprises a base 1, a thermal element mounted on the base 1, a tripping mechanism, a push rod 5, a stop button 2, a normally closed contact 3 and a normally open contact 4, the thermal element cooperates with the tripping mechanism, and the push rod 5 can be driven by the tripping mechanism to trip the thermal relay, the push rod 5 is arranged to move left and right and cooperates with the normally closed contact 3 and the normally open contact 4 to simultaneously drive the normally closed contact 3 and the normally open contact 4 to switch states (the normally closed contact 3 is disconnected, and the normally open contact 4 is closed; or the normally closed contact 3 is closed, and the normally open contact 4 is disconnected), the stop button 2 is arranged to move up and down and has an initial position, a stop position and a test position arranged in sequence, the stop button 2 cooperates with the normally closed contact 3 at the stop position to drive the normally closed contact 3 to be disconnected, thereby realizing the stop function; the stop button 2 directly drives the push rod 5 at the test position, so that the push rod 5 drives the normally closed contact 3 to be disconnected and simultaneously drives the normally open contact 4 to be closed, thereby realizing the test function. The thermal relay auxiliary mechanism system of the embodiment realizes the integration of the stop function and the test function of the auxiliary mechanism system into the same stop button 2 through the stop button 2 which cooperates with the normally closed contact 3 and the push rod 5 for simultaneously driving the normally closed contact 3 and the normally open contact 4, thereby reducing the difficulty of use, simplifying the operation, simultaneously canceling the test button to effectively avoid the risk of the test button of the original mechanism system being easily stuck, and directly driving the push rod 5 by the stop button 2 to realize the test function, thereby reducing the transmission, simplifying the action relationship and improving the reliability of the test function.

[0038] In addition, the initial position, the stop position and the test position of the stop button 2 are arranged in sequence in the embodiment, and the stop button 2 can be switched from the stop position to the test position to continuously perform the stop function and the test function of the thermal relay. In the embodiment, the stop button 2 always cooperates with the normally closed contact 3 to drive the normally closed contact 3 to be disconnected when the stop button 2 passes the stop position during the test operation. Of course, as another embodiment, the stop position and the test position can be arranged on the two sides of the initial position, and the stop button 2 does not pass the stop position during the test operation, so that the push rod 5 is driven by the stop button 2 at the test position to drive the normally closed contact 3 to be disconnected.

[0039] As shown in FIG. 2, FIG. 4 and FIG. 7, the stop function of the thermal relay auxiliary mechanism system of the embodiment, the side of the stop button 2 facing the normally closed contact 3 is provided with a convex cam 23 for cooperating with the transmission part 331 of the normally closed contact 3 at the stop position. Specifically, the profile surface of the cam 23 facing the transmission part 331 is provided with a convex part and a concave part arranged in sequence from top to bottom. As shown in FIG. 7, the concave part of the cam 23 is opposite to the transmission part 331 when the stop button 2 is at the initial position; and the convex part of the cam 23 abuts against the transmission part 331 when the stop button 2 moves downward to the stop position.

[0040] As shown in FIG. 1 and FIG. 3, the upper end of the stop button 2 extends out of the shell of the thermal relay for operation, and the lower end of the stop button 2 is connected with a reset spring 9 in the base 1, one end of the reset spring 9 is sleeved on the mounting column 24 at the lower end of the stop button 2, and the other end is connected to the base 1. Pressing the stop button 2 makes the stop button 2 switch from the initial position to the stop position or the test position, and the reset spring 9 stores energy; releasing the stop button 2 makes the reset spring 9 release energy to reset the stop button 2 to the initial position. The stop operation and the test operation can be used separately or continuously. When used separately, the stop button 2 is pressed to the stop / test position, and after the stop / test operation is completed, the stop button 2 is released to be reset to the initial position under the action of the reset spring 9. When used continuously, the stop button 2 is pressed lightly to the stop position (for example, about 3 mm) to complete the stop operation; then the stop button 2 is pressed to the bottom to the test position to complete the test operation; finally, the stop button 2 is released to be reset to the initial position under the action of the reset spring 9. It should be noted that whether the stop operation is pressed to the position can be understood according to the actual feedback. During the installation test stage before the circuit is powered on, the installer presses the stop button 2 while using a multimeter to detect whether the normally closed contact 3 is disconnected; during normal power-on operation, whether the AC contactor cooperating with the thermal relay is disconnected (i.e., whether the entire circuit system is disconnected) when the stop button 2 is pressed to determine whether the normally closed contact 3 of the thermal relay is disconnected.

[0041] The structure of the tripping mechanism can have various ways, and a preferred way is shown in FIG. 1 and FIG. 3. The tripping mechanism includes a rocker arm 7, a tension spring 8, and a tripping swing lever 6. The thermal element is driven and cooperated with the tripping swing lever 6. The thermal element of the embodiment is a bimetallic strip. When the overload current occurs, the bimetallic strip is bent and deformed to push the tripping swing lever 6. The tripping swing lever 6 is coupled with the base 1 through a first fulcrum 62 and can swing around the rotation center of the first fulcrum 62. The rocker arm 7 is coupled with the base 1 through a second fulcrum 71 and can swing around the rotation center of the second fulcrum 71. One end of the tension spring 8 is coupled with the tripping swing lever 6, and the other end of the tension spring 8 is connected with the rocker arm 7. The rocker arm 7 is coupled with the push rod 5. Specifically, one end of the tripping swing lever 6 is the first fulcrum 62, and the other end is provided with a tension spring hanging column. The rocker arm 7 is in the shape of U, including a rocker arm bottom edge, a rocker arm swing lever cooperating with the second fulcrum 71, and a rocker arm driving lever for driving the push rod 5. A V-shaped rocker arm protrusion 12 is arranged in the base 1. The bottom of the V-shaped rocker arm protrusion 12 is the second fulcrum 71. The rocker arm swing lever of the rocker arm 7 is supported on the second fulcrum 71 at the bottom of the rocker arm protrusion 12 to swing, and cooperates with the push rod 5. One end of the tension spring 6 is coupled with the tension spring hanging column of the tripping swing lever 6, and the other end is connected with the rocker arm bottom edge of the rocker arm 7. The rocker arm bottom edge is provided with a tension spring hanging hole for mounting the tension spring. Of course, the tripping mechanism can also use other existing structures.

[0042] As shown in FIG. 1, FIG. 3 and FIG. 6, the limiting structure of the push rod 5 in the embodiment, the base 1 is provided with two limiting parts 11 located on the upper and lower sides of the push rod 5, and the push rod 5 is limited between the two limiting parts 11. Specifically, the limiting part 11 is an L-shaped structure, the roots of the two limiting parts 11 are arranged in parallel and spaced apart, and the ends of the two limiting parts 11 are arranged oppositely. The roots of the two limiting parts 11 serve as the upper and lower limiting parts for the push rod 5, and the ends of the two limiting parts 11 serve as the front and rear limiting parts for the push rod 5. The two limiting parts 11 arranged on the base 2 effectively replace the original limiting function of the test button on the push rod 5, so that the test button and the spring are reduced on the basis of the original auxiliary mechanism system, and the manufacturing cost and production difficulty are greatly reduced.

[0043] As shown in FIG. 8-FIG. 10, the structure of the normally closed contact 3 and the normally open contact 4 in the embodiment, the normally closed contact 3 includes the movable contact 31 and the movable contact 32 arranged oppositely, the movable contact 32 is arranged on the movable contact support 33, the normally open contact 4 includes the movable contact 41 and the movable contact 42 arranged oppositely, the movable contact 42 is arranged on the movable contact support 43, and the push rod 5 is driven and matched with the movable contact support 33 and the movable contact support 43. The movable contact support 33 and the movable contact support 43 are both made of a strip-shaped elastic sheet, the movable contact support 33 provides the contact pressure when the movable contact 31 and the movable contact 32 are in contact through the elastic deformation of itself, and the movable contact support 43 provides the contact pressure when the movable contact 42 and the movable contact 41 are in contact through the elastic deformation of itself.

[0044] Preferably, as shown in FIG. 11 and FIG. 12, the movable contact 42 and the movable contact 41 are both in a strip-shaped block structure, optionally, the surface of the movable contact 42 for contact with the movable contact 41 is an arc surface, the surface of the movable contact 41 for contact with the movable contact 42 is a plane, and the two corners connected with the surface for contact with the movable contact 42 are rounded; the movable contact 31 and the movable contact 32 are both in a strip-shaped block structure, optionally, the surface of the movable contact 32 for contact with the movable contact 31 is an arc surface, the surface of the movable contact 31 for contact with the movable contact 32 is a plane, and the two corners connected with the surface for contact with the movable contact 32 are rounded. The movable contact and the stationary contact in a strip-shaped block structure can realize silver wire or silver tape feeding, automatic online welding or riveting, online shaping and other production processes, which can realize efficient production and avoid silver point pollution problems in the production process. Of course, the movable contact and the stationary contact of the normally closed contact 3 and the normally open contact 4 can also be a round rivet point as shown in FIG. 7.

[0045] Further, as shown in FIGS. 8-10, the moving stationary contact 31 and the moving moving contact 32 are cross-shaped cross-matched; the moving stationary contact 41 and the moving moving contact 42 are cross-shaped cross-matched. The cross-shaped cross-matching between the moving and stationary contacts can avoid the position deviation of the moving and stationary contacts caused by poor process level, avoid the problem of poor contact, and improve the design tolerance.

[0046] As shown in FIGS. 1 and 2, the first embodiment of the thermal relay auxiliary mechanism system test function, in this embodiment, the stop button 2 directly drives the push rod 5 when in the test position, so that the push rod 5 drives the normally closed contact 3 to break, and at the same time drives the normally open contact 4 to close. The stop button 2 is provided with a first driving part 21, and the push rod 5 is provided with a first driven part 51 opposite to the first driving part 21, and the first driving part 21 and the first driven part 51 are drivingly matched when the stop button 2 is in the test position. Specifically, the first driving part 21 is formed on the side of the stop button 2 away from the tripping mechanism and protrudes in the left-right direction; the first driven part 51 is formed on the side of the push rod 5 facing the stop button 2 and protrudes in the front-rear direction. The left-right direction protruding first driving part 21 and the front-rear direction protruding first driven part 51 are matched, so that the downward movement of the stop button 2 drives the left-right movement of the push rod 5, which is simple in structure, stable and reliable in driving action. Preferably, the first driven part 51 has a first driven surface 511 facing the first driving part 21, and the first driven surface 511 is a plane perpendicular to the movement direction of the push rod 5; the first driving part 21 is a triangular or trapezoidal protruding structure, and has a first driving surface 211 opposite to the first driven surface 511, and the first driving surface 211 is inclined to drive the first driven part 51 to move away from the stop button 2 during the movement of the stop button 2 from the stop position to the test position.

[0047] The stop operation process of the embodiment is shown in FIG. 7. The stop button 2 is pressed lightly, and the stop button 2 is forced to move downward to the stop position. The cam 23 on the stop button 2 pushes the moving stationary contact support 33 of the normally closed contact 3, so that the moving moving contact 32 moves to the right and separates from the moving stationary contact 31.

[0048] The testing operation process of the embodiment is shown in Fig. 1. When the stop button 2 is pressed to the bottom, the stop button 2 is forced to move downward to the testing position, the first driving part 21 of the stop button 2 acts on the first driven part 51 of the push rod 5, and then pushes the push rod 5 to move left (right in Fig. 7) to release the movable contact support 43 of the normally open contact 4 from the reverse thrust of the push rod 5, so as to drive the movable contact 42 to move and contact the fixed contact 41, and realize the closing of the normally open contact 4; at the same time, the left movement of the push rod 5 drives the rocker arm 7 to realize the action of the tripping mechanism. In the process of moving the stop button 2 from the stop position to the testing position, the normally closed contact 3 is always in the disconnected state, that is, the movable contact 32 is separated from the fixed contact 31.

[0049] Obviously, the implementation mode of the thermal relay auxiliary mechanism system test function can be that the stop button 2 directly drives the push rod 5 when the stop button 2 is in the testing position, as in Embodiment One, or can be Embodiment Two of the thermal relay auxiliary mechanism system test function shown in Figs. 3-5, in which the stop button 2 indirectly drives the push rod 5 through the tripping swing lever 6 of the tripping mechanism when the stop button 2 is in the testing position, so as to drive the normally closed contact 3 to disconnect and drive the normally open contact 4 to close. The stop button 2 is provided with a second driving part 22, and the tripping swing lever 6 is provided with a second driven part 61 opposite to the second driving part 22, and the second driving part 22 and the second driven part 61 are drivingly matched when the stop button 2 is in the testing position. The second driving part 22 has a second driving surface 221 perpendicular to the moving direction of the stop button 2; the second driven part 61 is formed on the side of the tripping swing lever 6 facing the stop button 2 and protruding in the left-right direction, and has a second driven surface 611 drivingly matched with the second driving surface 221, and the second driven surface 611 is obliquely arranged so that the second driven surface 611 is close to the stop button 2 along the direction in which the stop button 2 moves from the stop position to the testing position.

[0050] The stop operation process of the embodiment is the same as that in Embodiment One, as shown in Fig. 7. The stop button 2 is pressed, and the stop button 2 is forced to move downward to the stop position, and the cam 23 on the stop button 2 pushes the movable contact support 33 of the normally closed contact 3, so that the movable contact 32 moves right and separates from the fixed contact 31.

[0051] The test operation process of the embodiment is shown in Fig. 3. When the stop button 2 is pressed to the bottom and the stop button 2 is forced to move downward to the test position, the second driving part 22 of the stop button 2 acts on the second driven part 61 of the tripping swing lever 6 to drive the tripping swing lever 6 of the tripping mechanism to swing clockwise around the first fulcrum 62, the swing of the tripping swing lever 6 drives one end of the tension spring 8 to move rightward, and the tension spring 8 stores energy. When the rocker arm 7 reaches the limit of turning, the other end of the tension spring 8 drives the rocker arm 7 to swing rapidly around the fulcrum, so that the tripping mechanism is switched to the tripping state. Due to the state conversion of the tripping mechanism, the elastic force of the tension spring 8 participates in driving the clockwise swing of the rocker arm 7, and the lower end of the rocker arm 7 drives the push rod 5 to move leftward (rightward in Fig. 7), so that the movable contact supporting piece 43 of the normally open contact 4 is released from the reverse thrust of the push rod 5, thereby driving the movable contact 42 to move and contact the fixed contact 41, and realizing the closing of the normally open contact 4. The normally closed contact 3 is always in the breaking state during the movement of the stop button 2 from the stop position to the test position, that is, the movable breaking contact 32 is separated from the fixed breaking contact 31.

[0052] It should be noted that in the description of the present application, the terms "upper", "lower", "left", "right", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship commonly used in use, and are only for the convenience of description, and do not indicate that the device or element referred to must have a particular orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second", "third" and the like are only used for differentiation in description, and cannot be understood as indicating relative importance.

[0053] The above is a further detailed description of the present application in combination with specific preferred embodiments, and the specific implementation of the present application cannot be limited to these descriptions. For ordinary skilled persons in the technical field to which the present application belongs, without departing from the concept of the present application, a number of simple deductions or replacements can be made, which should be regarded as falling within the protection scope of the present application.

Claims

1. A thermal relay auxiliary mechanism system, comprising a base (1), a thermal element mounted on the base (1), a tripping mechanism, a push rod (5), a stop button (2), a normally closed contact (3), and a normally open contact (4), wherein the thermal element cooperates with the tripping mechanism to drive the push rod (5) to trip the thermal relay, the push rod (5) is movably positioned left and right and cooperates with the normally closed contact (3) and the normally open contact (4) to simultaneously drive the normally closed contact (3) and the normally open contact (4) to switch states, characterized in that: The stop button (2) is set to move up and down, and has an initial position, a stop position and a test position. When the stop button (2) is in the stop position, it cooperates with the normally closed contact (3) to drive the normally closed contact (3) to break. When the stop button (2) is in the test position, it directly drives the push rod (5) to drive the normally closed contact (3) to break, and at the same time drives the normally open contact (4) to close.

2. The thermal relay auxiliary mechanism system according to claim 1, characterized in that: The stop button (2) is provided with a first driving part (21), and the push rod (5) is provided with a first driven part (51) opposite to the first driving part (21). When the stop button (2) is in the test position, the first driving part (21) and the first driven part (51) drive each other.

3. The thermal relay auxiliary mechanism system according to claim 2, characterized in that: The stop button (2) protrudes along the left-right direction on the side facing away from the tripping mechanism to form the first driving part (21); the push rod (5) protrudes along the front-back direction on the side facing the stop button (2) to form the first driven part (51).

4. The thermal relay auxiliary mechanism system according to claim 3, characterized in that: The first driven part (51) has a first driven surface (511) facing the first driving part (21), and the first driven surface (511) is a plane perpendicular to the moving direction of the push rod (5); the first driving part (21) has a first driving surface (211) opposite to the first driven surface (511), and the first driving surface (211) is inclined so that the first driven part (51) is driven to move away from the stop button (2) during the process of the stop button (2) moving from the stop position to the test position.

5. The thermal relay auxiliary mechanism system according to claim 1, characterized in that: The initial position, stop position, and test position are set sequentially.

6. The thermal relay auxiliary mechanism system according to claim 1, characterized in that: The normally closed contact (3) includes a normally open stationary contact (31) and a normally open moving contact (32) arranged opposite to each other. The normally open moving contact (32) is disposed on the normally open contact support (33). The normally open contact (4) includes a normally closed stationary contact (41) and a normally closed moving contact (42) arranged opposite to each other. The normally closed moving contact (42) is disposed on the normally closed contact support (43). The push rod (5) drives and cooperates with the normally open contact support (33) and the normally closed contact support (43).

7. The thermal relay auxiliary mechanism system according to claim 6, characterized in that: The moving contact (42) and the moving contact (41) are both strip-shaped block structures; the moving contact (31) and the moving contact (32) are both strip-shaped block structures.

8. The thermal relay auxiliary mechanism system according to claim 7, characterized in that: The moving contact (31) and the moving contact (32) are in a cross-shaped interlocking configuration; the moving contact (42) and the moving contact (41) are in a cross-shaped interlocking configuration.

9. The thermal relay auxiliary mechanism system according to claim 1, characterized in that: The base (1) is provided with two limiting parts (11) located on the upper and lower sides of the push rod (5), and the push rod (5) is limited between the two limiting parts (11).

10. The thermal relay auxiliary mechanism system according to claim 1, characterized in that: The stop button (2) has a raised cam (23) on the side facing the normally closed contact (3) for engaging with the transmission part (331) of the normally closed contact (3) when in the stop position.

11. The thermal relay auxiliary mechanism system according to claim 1, characterized in that: The tripping mechanism includes a rocker arm (7), a tension spring (8), and a tripping lever (6); the heating element is driven to cooperate with the tripping lever (6), the tripping lever (6) is connected to the base (1) through the first fulcrum (62), and can swing around the rotation center of the first fulcrum (62); the rocker arm (7) is connected to the base (1) through the second fulcrum (71), and can swing around the rotation center of the second fulcrum (71); one end of the tension spring (8) is connected to the tripping lever (6), the other end of the tension spring (8) is connected to the rocker arm (7), and the rocker arm (7) is coupled to the push rod (5).

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