Tripping assembly and thermal relay

Abstract

The application provides a tripping assembly of a thermal relay. The tripping assembly comprises a static contact, a moving contact and a support. The static contact comprises an elastic fixing part and a first contact part, the elastic fixing part is fixed to a shell of the thermal relay and can be elastically deformed to move the first contact part. The moving contact has a second contact part rotating around a first axis, the second contact part can move along a first circumferential direction and abut against the first contact part along an abutting direction, and the second contact part can also push the first contact part to move. The support can be arranged on the shell, and the support can support the first contact part in the direction opposite to the abutting direction to prevent the first contact part from being deformed relative to the elastic fixing part when the second contact part abuts. The tripping assembly provided by the application can avoid deformation of the static contact and ensure that the function of the thermal relay is more stable. The application also provides a thermal relay comprising the tripping assembly.

Description

Technical Field

[0001] This invention relates to a tripping assembly, and more particularly to a tripping assembly for a thermal relay, and a thermal relay including the tripping assembly. Background Technology

[0002] A thermal relay is a widely used low-voltage electrical appliance for protection. It not only possesses inverse-time protection characteristics but is also widely used for overload and phase loss protection of motors due to its simple structure, small size, low cost, and ease of use. The thermal relay utilizes a bimetallic strip mechanism to achieve its protection function. When an overload occurs in the main circuit, the heating element connected in series with the main circuit heats up, causing the bimetallic strip, which has different coefficients of thermal expansion, to deform. When the deformation reaches a certain level, the control circuit is thus cut off, and the main circuit is de-energized, achieving the purpose of protection.

[0003] Thermal relays typically have a stationary contact that connects to a normally open contact. During tripping, the push rod and moving contact move and respectively contact the spring catch and the stationary contact. At this time, the stationary contact electrically connects the moving contact and the normally open contact. After multiple trips, the spring catch and stationary contact will deform under the impact force of the push rod and moving contact, causing a shift in the position of the push rod when it contacts the spring catch and the position of the moving contact when it contacts the stationary contact. This results in the failure of the thermal relay's tripping and automatic reset functions. Summary of the Invention

[0004] The purpose of this invention is to provide a tripping component for a thermal relay that can prevent deformation of the stationary contact and ensure more stable function of the thermal relay.

[0005] Another objective of this invention is to provide a thermal relay that avoids deformation of the stationary contact and provides more stable functionality.

[0006] This invention provides a tripping assembly for a thermal relay, comprising a stationary contact, a moving contact, and a support member. The stationary contact includes an elastic fixing portion and a first contact portion. The elastic fixing portion is fixed to the housing of the thermal relay and can elastically deform to move the first contact portion between an automatic reset contact position and a manual reset contact position. The moving contact is rotatably disposed in the housing about a first axis. The moving contact has a second contact portion that rotates about the first axis. The second contact portion can move along a first circumferential direction and abut against the first contact portion located at the automatic reset contact position along a direction perpendicular to the first axis. The second contact portion can also push the first contact portion located at the automatic reset contact position to the manual reset contact position. When the second contact portion moves in the opposite direction along the first circumferential direction, the first contact portion can move from the manual reset contact position to the automatic reset contact position under the drive of the elastic restoring force of the elastic fixing portion. The support member can be movably disposed on the housing. When the first contact portion is in the automatic reset contact position and the manual reset contact position, the support member can support the first contact portion in the opposite direction of the abutment direction to prevent the first contact portion from deforming relative to the elastic fixing portion when abutted by the second contact portion.

[0007] The tripping assembly of the thermal relay provided by this invention includes a support member movably mounted on the housing. When the first contact portion is in the automatic reset contact position and the manual reset contact position, the support member supports the first contact portion in the opposite direction of the abutment direction. This prevents the first contact portion from deforming relative to the elastic fixing portion under the abutment of the second contact portion, thus preventing the thermal relay's automatic reset function from failing. The tripping assembly provided by this invention makes the thermal relay's function more stable.

[0008] In another illustrative embodiment of the tripping assembly of the thermal relay, the tripping assembly further includes a reset button. The reset button is movably disposed in the housing between an automatic reset position and a manual reset position. When the reset button is in the automatic reset position, it can abut against the elastic fixing part in the opposite direction of the abutment direction and prevent the elastic fixing part from deforming, so that the first contact part is kept in the automatic reset contact position. When the reset button is in the manual reset position, the elastic fixing part can deform to move the first contact part to the manual reset contact position.

[0009] In another illustrative embodiment of the tripping assembly of the thermal relay, a support member is movably disposed on the housing along the abutment direction and its opposite direction. The tripping assembly also includes a second elastic member capable of applying force to the housing and the support member respectively, to provide an elastic restoring force that causes the support member to abut against the reset button along the abutment direction. When the reset button moves from the manual reset position to the automatic reset position, it can abut against the support member in the opposite direction of the abutment direction to overcome the elastic restoring force of the second elastic member and move to a first support position. The support member in the first support position can support the first contact portion located in the automatic reset contact position. When the reset button moves from the automatic reset position to the manual reset position, the support member moves to a second support position driven by the elastic restoring force of the second elastic member. The support member in the second support position can support the first contact portion located in the manual reset contact position.

[0010] In another illustrative embodiment of the tripping assembly of the thermal relay, the support member includes a drive portion, which is a cylinder with a boss at one end and its axis is parallel to the abutment direction. A second elastic member is a compression spring sleeved on the drive portion, with its two ends abutting against the housing and the boss, respectively. This simple structure allows the support member to be movably mounted on the housing.

[0011] In another illustrative embodiment of the tripping assembly of the thermal relay, when the reset button is in the auto-reset position, the second contact portion can abut against the first contact portion in the auto-reset contact position before moving to a zero position. When the reset button is in the manual reset position, the second contact portion can also push the first contact portion in the auto-reset contact position to move, and after the second contact portion moves to a zero position, push the first contact portion to move to the manual reset contact position. The tripping assembly also includes a first elastic member, which can apply force to the housing and the moving contact respectively. The first elastic member can apply an elastic restoring force to move the second contact portion in the opposite direction of the first circumferential direction before the second contact portion moves to the zero position along the first circumferential direction, and the first elastic member can apply an elastic restoring force to move the second contact portion in the first circumferential direction after the second contact portion moves to the zero position along the first circumferential direction.

[0012] In another illustrative embodiment of the tripping assembly of the thermal relay, the first elastic element is a tension spring, and one end of the first elastic element is connected to the moving contact. The tripping assembly also includes a latch, one end of which is connected to the housing, and the other end of which is connected to the other end of the first elastic element.

[0013] In another illustrative embodiment of the tripping assembly of the thermal relay, the tripping assembly further includes a push rod and a resilient pusher. The push rod is rotatable relative to the housing about a second axis parallel to the first axis, and the push rod is driven by the bimetallic strip mechanism of the thermal relay to rotate. The resilient pusher can be disposed in the housing, and the resilient pusher can be deformed by the rotating push rod, thereby pushing the moving contact to rotate, and thus enabling the second contact portion to move along the first circumferential direction to abut against the first contact portion. This achieves the push rod driving the moving contact while preventing the tripping function of the tripping assembly from failing.

[0014] In another illustrative embodiment of the tripping assembly of the thermal relay, the tripping assembly further includes a mounting bracket that can be fixed to the housing. The moving contact is rotatably mounted on the mounting bracket. One end of the latch is connected to the mounting bracket, and the other end is connected to a first elastic element. An elastic pusher is fixed to the mounting bracket. This structure facilitates the assembly of the thermal relay.

[0015] In another illustrative embodiment of the tripping assembly of the thermal relay, the tripping assembly further includes an adjusting screw that passes through the mounting bracket along the abutment direction and is threadedly connected to the mounting bracket. One end of the latch is connected to the adjusting screw, and the other end is connected to the first elastic element. This structure enables the zero-point position of the moving contact to be adjusted.

[0016] In another illustrative embodiment of the tripping assembly of the thermal relay, the tripping assembly further includes an adjusting rod rotatably mounted on the housing about a third axis parallel to the first axis, and a push rod rotatably mounted on the adjusting rod about a second axis, allowing the second axis to rotate about the third axis. This structure enables the adjustment of the push rod's rotation axis, thereby compensating for errors in the bimetallic strip mechanism's drive of the push rod.

[0017] The present invention provides a thermal relay, including a housing and the aforementioned tripping assembly. An elastic fixing part is fixed to the housing, a moving contact is rotatably disposed on the housing about a first axis, and a support member is movably disposed on the housing. Attached Figure Description

[0018] The following figures are for illustrative purposes only and do not limit the scope of the invention.

[0019] Figure 1 This is a schematic diagram illustrating one embodiment of the tripping assembly of a thermal relay.

[0020] Figure 2 For illustrative purposes Figure 1 The diagram shows a motion state of the tripping assembly.

[0021] Figure 3 For illustrative purposes Figure 1The diagram shows another motion state of the tripping assembly.

[0022] Figure 4 for Figure 2 Partial sectional view at position IV-IV.

[0023] Figure 5 for Figure 3 Partial sectional view at position VV.

[0024] Figure 6 for Figure 1 The diagram shows a partial structural schematic of the tripping assembly.

[0025] Label Explanation

[0026] 10 Static Contact Pieces

[0027] 11. Elastic fixing part

[0028] 12 First Contact Section

[0029] 20 Moving contacts

[0030] 22 Second Contact Section

[0031] 30 First elastic element

[0032] 31 Hook

[0033] 40 Support components

[0034] 42 Drive Unit

[0035] 43 Second elastic element

[0036] 44 Boss

[0037] 50 Reset Button

[0038] 60 putter

[0039] 62 Adjusting rod

[0040] 70 Flexible pusher component

[0041] 80 Assembly bracket

[0042] 82 Adjusting screw

[0043] 90 housing

[0044] S1 First Axis

[0045] S2 Second Axis

[0046] S3 Third Axis

[0047] A. First circumferential direction

[0048] X (Direction of contact) Detailed Implementation

[0049] To provide a clearer understanding of the technical features, objectives, and effects of the invention, specific embodiments of the invention are now described with reference to the accompanying drawings. In the drawings, the same reference numerals indicate components with the same or similar structures but the same function.

[0050] In this document, “illustrative” means “serving as an example, illustration or description”, and any illustration or implementation described herein as “illustrative” should not be construed as a more preferred or advantageous technical solution.

[0051] To keep the drawings concise, only the parts relevant to the invention are shown schematically in each figure, and they do not represent the actual structure of the product. Furthermore, for ease of understanding, in some figures, only one of the components with the same structure or function is shown schematically, or only one is labeled.

[0052] In this patent application, nouns and pronouns relating to people are not limited to specific genders.

[0053] In this article, terms such as "up," "down," "front," "back," "left," and "right" are used only to indicate the positional relationship between related parts, rather than to define their absolute positions.

[0054] In this article, "first," "second," etc., are used only to distinguish them from each other, and do not indicate their importance or order.

[0055] In this paper, terms such as “parallel” and “perpendicular” are not strict mathematical and / or geometric limitations, but also include errors that are understandable to those skilled in the art and permissible in manufacturing or use.

[0056] To keep the drawings simple, each drawing only schematically shows the parts related to the present invention, and they do not represent the actual structure of the product.

[0057] Figure 1 This is a schematic diagram illustrating one embodiment of the tripping assembly of a thermal relay. (Refer to...) Figure 1 The tripping assembly of the relay includes a stationary contact 10, a moving contact 20, and a support 40.

[0058] Figure 2 and Figure 3 For illustrative purposes Figure 1 The diagram shows the movement of the tripping assembly. (Refer to...) Figure 2 and Figure 3The stationary contact 10 includes an elastic fixing part 11 and a first contact part 12. The elastic fixing part 11 is fixed to the housing 90 of the thermal relay and can elastically deform to make the first contact part 12 in a position such as Figure 2 The automatic reset contact position shown and a... Figure 3 The movement occurs between the manual reset contact positions shown.

[0059] In the illustrative embodiment, refer to Figure 2 and Figure 3 The trip assembly also includes a reset button 50, which is located in a position such as... Figure 2 The reset button 50 is movably disposed between an automatic reset position and a manual reset position as shown in Figure 3 within the housing 90. When the reset button 50 is in the automatic reset position, it can abut against the elastic fixing part 11 in the opposite direction of the abutment direction X and prevent the elastic fixing part 11 from deforming, thus keeping the first contact part 12 in the automatic reset contact position. When the reset button 50 is in the manual reset position, the elastic fixing part 11 can deform to move the first contact part 12 to the manual reset contact position.

[0060] Reference Figure 1 , Figure 2 and Figure 3 The moving contact 20 is rotatably mounted on the housing 90 about a first axis S1. The moving contact 20 has a second contact portion 22 that rotates about the first axis S1, and the second contact portion 22 is rotatable along a first circumferential direction A. Figure 1 and Figure 2 (in a clockwise direction) and as Figure 2 As shown, the second contact 22 abuts against the first contact portion 12 located in the automatic reset contact position along a contact direction X perpendicular to the first axis S1. The second contact portion 22 can also push the first contact portion 12 located in the automatic reset contact position to move to... Figure 3 The manual reset contact position is shown. When the second contact 22 moves in the opposite direction to the first circumferential direction A, refer to... Figure 1 The first contact portion 12 can move from the manual reset contact position to the automatic reset contact position under the elastic restoring force of the elastic fixing portion 11.

[0061] In the illustrative embodiment, refer to Figure 2 and Figure 3When the reset button 50 is in the automatic reset position, the second contact portion 22 can abut against the first contact portion 12 in the automatic reset contact position before moving to a zero position. When the reset button 50 is in the manual reset position, the second contact portion 22 can also push the first contact portion 12 in the automatic reset contact position to move, and after the second contact portion 22 moves to a zero position, it pushes the first contact portion 12 to move to the manual reset contact position. The tripping assembly also includes a first elastic element 30, which can apply force to the housing 90 and the moving contact 20 respectively. When the second contact portion 22 is in the zero position, the direction of the force applied by the first elastic element 30 to the second contact portion 22 is perpendicular to the first axis S1. The first elastic element 30 can abut against the second contact portion 22 in the first circumferential direction A before (e.g.) moving to the zero position. Figure 2 As shown, an elastic restoring force is applied to the second contact portion 22 in the opposite direction to the first circumferential direction A. The first elastic member 30 can then move the second contact portion 22 to the zero position after it has moved along the first circumferential direction A (as shown). Figure 3 (As shown) An elastic restoring force is applied to move the second contact portion 22 along the first circumferential direction A. With the above structure, when the reset button 50 is in the automatic reset position, the moving contact 20 can automatically reset with the help of the elastic restoring force of the first elastic member 30. However, when the reset button 50 is in the manual reset position, the moving contact 20 cannot automatically reset with the help of the elastic restoring force of the first elastic member 30. It is necessary to operate the reset button 50 to drive the stationary contact piece 10, thereby pushing the moving contact 20 to move and reset.

[0062] Reference Figure 2 and Figure 3 The support member 40 can be fixed to two positions on the housing 90. When the first contact portion 12 is in the automatic reset contact position and the manual reset contact position, the support member 40 can be located at two positions on the housing 90 respectively, and supports the first contact portion 12 in the opposite direction of the contact direction X, so as to prevent the first contact portion 12 from bending and deforming relative to the elastic fixing portion 11 under the contact of the second contact portion 22. Without the support of the support member 40, after the second contact portion 22 repeatedly impacts the first contact portion 12, the first contact portion 12 will bend and deform relative to the elastic fixing portion 11. When the reset button 50 is in the automatic reset position, the bending deformation of the first contact portion 12 will cause the second contact portion 22 to have passed the zero point position when it abuts against the first contact portion 12, and the moving contact 20 cannot automatically reset with the elastic restoring force of the first elastic member 30, causing the automatic reset function of the thermal relay to fail.

[0063] The tripping assembly of the thermal relay provided by this invention includes a support member 40 that can be fixed to two positions on the housing 90. When the first contact portion 12 is in the automatic reset contact position and the manual reset contact position, the support member 40 supports the first contact portion 12 in the opposite direction of the abutment direction X, preventing the first contact portion 12 from deforming relative to the elastic fixing portion 11 under the abutment of the second contact portion 22, thus preventing the thermal relay's automatic reset function from failing. The tripping assembly provided by this invention makes the thermal relay function more stable.

[0064] Figure 4 for Figure 2 Partial sectional view at position IV-IV. Figure 5 for Figure 3 A partial sectional view at position VV. (Refer to...) Figures 2 to 5 In the illustrative embodiment, the support member 40 is movably disposed on the housing 90 along the abutment direction X and the opposite direction. The tripping assembly also includes a second elastic member 43, which is capable of applying force to the housing 90 and the support member 40 respectively to provide an elastic restoring force for the support member 40 to abut against the reset button 50 along the abutment direction X.

[0065] Reference Figure 2 and Figure 4 When the reset button 50 moves from the manual reset position to the automatic reset position, it can move to a first support position by abutting the support member 40 in the opposite direction of the abutting direction X, overcoming the elastic restoring force of the second elastic member 43. The support member 40 in the first support position can support the first contact portion 12 located in the automatic reset contact position. (Refer to...) Figure 3 and Figure 5 When the reset button 50 moves from the automatic reset position to the manual reset position, the support member 40 moves to a second support position under the elastic restoring force of the second elastic member 43. The support member 40 in the second support position can support the first contact part 12 located in the manual reset contact position.

[0066] In the illustrative embodiment, refer to Figure 4 and Figure 5 The support member 40 includes a driving part 42, which is a cylinder with a boss 44 at one end and its axis is parallel to the abutment direction X. The second elastic member 43 is a compression spring sleeved on the driving part 42, and its two ends abut against the housing 90 and the boss 44, respectively. This simple structure enables the support member 40 to be movably disposed in the housing 90 in conjunction with the reset button 50. However, it is not limited to this; in other illustrative embodiments, the support member 40 and the second elastic member 43 can also be other structures that can achieve the same function.

[0067] In the illustrative embodiment, refer to Figure 1The first elastic element 30 is a tension spring, and one end of the first elastic element 30 is connected to the moving contact 20. The tripping assembly also includes a hook 31, one end of which is connected to the housing 90, and the other end is connected to the other end of the first elastic element 30. Using the hook 31 instead of the entire tension spring can save space within the housing 90.

[0068] In the illustrative embodiment, refer to Figures 1 to 3 The tripping assembly also includes a push rod 60 and a resilient pusher 70. The push rod 60 is rotatable relative to the housing 90 about a second axis S2 parallel to the first axis S1. The push rod 60 can be engaged in the bimetallic strip mechanism of the thermal relay. Figure 1 (Not shown in the diagram) Driven by the mechanism, the moving contact 20 rotates. An elastic pusher 70 can be disposed in the housing 90. The elastic pusher 70 can be deformed by the rotating pusher 60, causing the moving contact 20 to rotate, thereby allowing the second contact portion 22 to move along the first circumferential direction A to abut against the first contact portion 12. Since the pusher 60 has a large kinetic energy when rotating under the drive of the bimetallic strip mechanism, it cannot directly act on the moving contact 20. The pusher 60 is usually configured to push the latch 31, indirectly driving the moving contact 20. Repeated impacts of the pusher 60 on the latch 31 will cause the latch 31 to deform, and the pusher 60 will gradually lose its ability to drive the latch 31, causing the thermal relay's tripping function to fail. However, in the above structure, the pusher 60 indirectly pushes the moving contact 20 through the elastic pusher 70. With the elasticity of the elastic pusher 70 itself, it not only acts as a buffer but also automatically restores its shape, preventing tripping function failure and making the thermal relay function more stable.

[0069] In the illustrative embodiment, refer to Figures 1 to 3 The tripping assembly also includes an adjusting rod 62, which is rotatably mounted on the housing 90 about a third axis S3 parallel to the first axis S1. A push rod 60 is rotatably mounted on the adjusting rod 62 about a second axis S2, allowing the second axis S2 to rotate about the third axis S3. The adjusting rod 62 can be rotated to different positions and then fixed, thereby making the rotation axis of the push rod 60 adjustable, thus compensating for errors in the bimetallic strip mechanism's drive of the push rod 60.

[0070] Figure 6 for Figure 1 A partial structural diagram of the tripping assembly is shown. (Refer to...) Figure 1 and Figure 6The tripping assembly also includes a mounting bracket 80 and an adjusting screw 82. The mounting bracket 80 can be fixed to the housing 90, the moving contact 20 is rotatably disposed on the mounting bracket 80, and the elastic pusher 70 is fixed to the mounting bracket 80. The adjusting screw 82 passes through the mounting bracket 80 along the abutment direction X and is threadedly connected to the mounting bracket 80. One end of the latch 31 is connected to the adjusting screw 82, and the other end is connected to the first elastic member 30. During the assembly of the thermal relay, the moving contact 20, the first elastic member 30, the latch 31, and the elastic pusher 70 can be installed into the mounting bracket 80 first, and then the whole assembly can be installed into the housing 90, which facilitates the assembly of the thermal relay. The zero point position of the moving contact 20 can be adjusted by means of the adjusting screw 82. However, it is not limited to this. In other illustrative embodiments, the adjusting screw 82 and the mounting bracket 80 may not be provided.

[0071] This invention provides a thermal relay, with reference to Figure 1 The thermal relay includes a housing 90 and the aforementioned tripping assembly. The elastic fixing part 11 is fixed to the housing 90, the moving contact 20 is rotatably disposed on the housing 90 about the first axis S1, and the support member 40 can be disposed at two positions on the housing 90.

[0072] It should be understood that although this specification is described according to various embodiments, not every embodiment contains only one independent technical solution. This way of describing the specification is only for clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

[0073] The detailed descriptions listed above are merely specific descriptions of feasible embodiments of the present invention and are not intended to limit the scope of protection of the present invention. All equivalent implementation schemes or modifications made without departing from the spirit of the present invention, such as combinations, divisions or repetitions of features, should be included within the scope of protection of the present invention.

Claims

1. A tripping assembly for a thermal relay, characterized in that, include: A stationary contact piece (10) includes an elastic fixing part (11) and a first contact part (12), wherein the elastic fixing part (11) is fixed to the housing of the thermal relay and is capable of elastic deformation to allow the first contact part (12) to move between an automatic reset contact position and a manual reset contact position; A movable contact (20) is rotatably disposed in the housing about a first axis (S1). The movable contact (20) has a second contact portion (22) that rotates about the first axis (S1). The second contact portion (22) is movable along a first circumferential direction (A) and abuts against the first contact portion (12) located at the automatic reset contact position along an abutting direction (X) perpendicular to the first axis (S1). The second contact portion (22) can also push the first contact portion (12) located at the automatic reset contact position to the manual reset contact position. When the second contact portion (22) moves in the opposite direction of the first circumferential direction (A), the first contact portion (12) can move from the manual reset contact position to the automatic reset contact position under the elastic restoring force of the elastic fixing portion (11). as well as A support member (40) is movably disposed in the housing, the support member (40) being able to support the first contact portion (12) in the opposite direction of the abutment direction (X) when the first contact portion (12) is in the automatic reset contact position and the manual reset contact position, so as to prevent the first contact portion (12) from deforming relative to the elastic fixing portion (11) when the second contact portion (22) abuts against it.

2. The tripping assembly of the thermal relay as described in claim 1, characterized in that, The tripping assembly also includes a reset button (50), which is movably disposed in the housing between an automatic reset position and a manual reset position. When the reset button (50) is in the automatic reset position, it can abut against the elastic fixing part (11) in the opposite direction of the abutting direction (X) and prevent the elastic fixing part (11) from deforming, so that the first contact part (12) is held in the automatic reset contact position. When the reset button (50) is in the manual reset position, the elastic fixing part (11) can deform to move the first contact part (12) to the manual reset contact position.

3. The tripping assembly of the thermal relay as described in claim 2, characterized in that, The support member (40) is movably disposed on the housing along the abutting direction (X) and its opposite direction; the tripping assembly further includes a second elastic member (43), which can apply force to the housing and the support member (40) respectively to provide an elastic restoring force for the support member (40) to abut against the reset button (50) along the abutting direction (X); when the reset button (50) moves from the manual reset position to the automatic reset position, it can abut against the support member (40) in the opposite direction of the abutting direction (X) to overcome the second elastic member (43). 3) The elastic restoring force moves to a first support position, and the support member (40) located at the first support position can support the first contact part (12) located at the automatic reset contact position. When the reset button (50) moves from the automatic reset position to the manual reset position, the support member (40) moves to a second support position under the drive of the elastic restoring force of the second elastic member (43). The support member (40) located at the second support position can support the first contact part (12) located at the manual reset contact position.

4. The tripping assembly of the thermal relay as described in claim 3, characterized in that, The support member (40) includes a drive part (42), which is a cylinder with a boss (44) at one end and whose axis is parallel to the abutment direction (X); the second elastic member (43) is a compression spring sleeved on the drive part (42), and the two ends of the second elastic member (43) can abut against the housing and the boss (44) respectively.

5. The tripping assembly of the thermal relay as described in claim 2, characterized in that, When the reset button (50) is in the automatic reset position, the second contact part (22) can abut against the first contact part (12) located in the automatic reset contact position before moving to a zero position. When the reset button (50) is in the manual reset position, the second contact part (22) can push the first contact part (12) located in the automatic reset contact position to move, and after the second contact part (22) moves to a zero position, it pushes the first contact part (12) to move to the manual reset contact position. The tripping assembly further includes a first elastic element (30) which can apply force to the housing and the moving contact (20) respectively. The first elastic element (30) can apply an elastic restoring force to move the second contact (22) in the opposite direction of the first circumferential direction (A) before the second contact (22) moves to the zero position along the first circumferential direction (A). The first elastic element (30) can apply an elastic restoring force to move the second contact (22) along the first circumferential direction (A) after the second contact (22) moves to the zero position along the first circumferential direction (A).

6. The tripping assembly of the thermal relay as described in claim 5, characterized in that, The first elastic element (30) is a tension spring, and one end of the first elastic element (30) is connected to the moving contact (20); the tripping assembly also includes a hook (31), one end of the hook (31) is connected to the housing, and the other end is connected to the other end of the first elastic element (30).

7. The tripping assembly of the thermal relay as described in claim 6, characterized in that, The tripping assembly also includes: A push rod (60) rotatable relative to the housing about a second axis (S2) parallel to the first axis (S1), the push rod (60) being rotatable under the drive of the bimetallic strip mechanism of the thermal relay; and An elastic pusher (70) is disposed in the housing. The elastic pusher (70) can be deformed by the rotating push rod (60) and push the moving contact (20) to rotate, thereby enabling the second contact portion (22) to move along the first circumferential direction (A) to abut against the first contact portion (12).

8. The tripping assembly of the thermal relay as described in claim 7, characterized in that, The tripping assembly also includes an assembly bracket (80) that can be fixed to the housing. The moving contact (20) is rotatably disposed on the assembly bracket (80). One end of the hook (31) is connected to the assembly bracket (80) and the other end is connected to the first elastic member (30). The elastic pusher (70) is fixed to the assembly bracket (80).

9. The tripping assembly of the thermal relay as described in claim 8, characterized in that, The tripping assembly also includes an adjusting screw (82) which passes through the mounting bracket (80) along the abutment direction (X) and is threadedly connected to the mounting bracket (80). One end of the hook (31) is connected to the adjusting screw (82), and the other end is connected to the first elastic element (30).

10. The tripping assembly of the thermal relay as described in claim 7, characterized in that, The tripping assembly further includes an adjusting rod (62) rotatably disposed on the housing about a third axis (S3) parallel to the first axis (S1), and the push rod (60) is rotatably disposed on the adjusting rod (62) about the second axis (S2), so that the second axis (S2) can rotate about the third axis (S3).

11. A thermal relay, characterized in that, include: A shell (90); as well as A tripping assembly as claimed in any one of claims 1 to 10, wherein the elastic fixing part (11) is fixed to the housing (90), the movable contact (20) is rotatably disposed on the housing (90) about the first axis (S1), and the support member (40) is movably disposed on the housing (90).

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