Armature and electromagnetic tripping structure

Abstract

The technical scheme belongs to the technical field of circuit breakers, and particularly relates to an armature and an electromagnetic tripping structure, the armature comprises an armature piece, and the armature piece comprises a suction section used for being sucked with a tripper of the electromagnetic tripping structure; the end part of the lock catch section is provided with a lock catch bulge, and the lock catch bulge is used for being clamped with a reset button of the magnetic tripping structure, so that the armature piece is in a lock catch state; the buckle section is connected between the attraction section and the lock catch section, a buckle hole is formed in the buckle section, the fixed column can penetrate through the buckle hole, the buckle section is rotationally arranged on the outer side of the fixed column in a sleeving mode through the buckle hole, and when the attraction section is attracted, the armature piece rotates through the buckle section to drive the lock catch section to conduct unlocking. The armature piece is sequentially connected into a whole through the attraction section, the buckle section and the lock catch section, the structural strength and stability are improved, the lock catch protrusion at the end of the lock catch section is smoothly disengaged from the reset button of the electromagnetic tripping structure, tripping is achieved, the armature has the lock catch function and the tripping function after attraction, and durability and reliability are improved.

Description

Technical Field

[0001] This technical solution relates to the field of circuit breaker technology, specifically to an armature and electromagnetic tripping structure. Background Technology

[0002] A circuit breaker is a circuit protection device that uses an electromagnetic system to engage when a large current is applied during a short circuit, causing the armature to move under force. During this movement, the armature pushes the control mechanism to disengage and disconnect the energized circuit, automatically providing protection against undervoltage, overload, and short circuit.

[0003] For example, Chinese patent CN201893303U discloses a modular residual current trip device, including a base and a top cover. The base is equipped with a zero-sequence current transformer, a circuit board, a contact plate with embedded wires, and one or more pole terminals. Current flows through the coil assembly and generates sufficient alternating electromagnetic attraction to attract the moving iron core. The moving iron core drives its corresponding push rod to rotate to the right. After being combined with a miniature circuit breaker, the elliptical connecting rod of the push rod extends into the mechanism of the miniature circuit breaker. The rotation of the corresponding push rod can drive the miniature circuit breaker to trip and cut off the power supply.

[0004] The aforementioned modular residual current trip unit uses the magnetic force generated by the current flowing through the coil assembly to attract the moving iron core. During the adsorption process, the moving iron core drives the push rod to achieve circuit breaker tripping and power disconnection. Relying on the transmission relationship, due to friction, wear and possible loosening between components, long-term use may easily lead to damage or detachment, which needs to be improved. Summary of the Invention

[0005] This technical solution addresses the problem that the pull rod can cause the moving iron core to disengage during adsorption, which can easily lead to damage or detachment after prolonged use. It provides an armature and electromagnetic release structure.

[0006] The purpose of this technical solution is achieved as follows:

[0007] An armature, comprising an armature element, said armature element comprising:

[0008] The engaging section is used to engage with the trip unit of the electromagnetic tripping structure.

[0009] The locking section has a locking protrusion at its end, which is used to engage with the reset button of the magnetic release structure, so that the armature is in the locking state;

[0010] The ring-shaped section is connected between the suction section and the locking section. The ring-shaped section is formed with a buckle hole for the fixing post to pass through and for the ring-shaped section to rotate and fit on the outside of the fixing post. When the suction section is engaged, the armature rotates through the ring-shaped section to drive the locking section to unlock.

[0011] Through the above technical solution, when an armature is in normal use, the armature is composed of an engaging section, a ring-locking section, and a locking section connected in sequence to form a whole, which improves the structural strength and stability. The coordinated work between the sections allows the armature to work together. When the release device of the electromagnetic release structure is activated, the magnetic force it generates attracts the engaging section of the armature, and the two are tightly attracted. The armature, as a whole, can then rotate flexibly around the fixed post through the buckle hole on its ring-locking section, thereby driving the locking section to perform the release action. The locking protrusion at the end of the locking section smoothly disengages from the reset button of the electromagnetic release structure, realizing the release. The armature has both a locking function and a release function after engaging, optimizing the force transmission path and improving durability and reliability.

[0012] Preferably, the ring buckle segment is integrally formed between the suction segment and the locking segment.

[0013] The above technical solutions enhance the overall structural strength of the armature by integral molding, improve the accuracy and consistency of the armature during operation, simplify the production process, reduce manufacturing costs, and also help improve production efficiency.

[0014] Preferably, the suction section and the locking section are spaced apart and have a splicing seam.

[0015] The above technical solution forms the splice seam by deforming and bringing the suction section and locking section on both sides closer together. By expanding the suction section and locking section on both sides, the channel width of the splice seam is increased, and the diameter of the buckle hole is enlarged. This is suitable for fixing columns with a cross-sectional size slightly larger than or equal to the buckle hole, thus improving applicability.

[0016] The ring-shaped section applies a certain clamping force to the fixed post, making the armature rotate more stably around the fixed post.

[0017] An electromagnetic tripping structure includes a housing and a short circuit breaker attached to one side of the housing. A circuit board is installed inside the housing, and a tripping device is installed on the circuit board. The tripping device is used to attract the engaging section when energized. The structure is characterized by further including an armature as described in any of the preceding claims, and also includes a testing component and a tripping mechanism. The testing component includes:

[0018] A test button is movably mounted on the housing, and the test button can be switched between an open state and a closed state;

[0019] A test resistor is mounted on the circuit board;

[0020] A button torsion spring, wherein the upper contact of the button torsion spring applies a preload to the test button, and the lower contact of the other end abuts against the test resistor; and

[0021] A test spring, one end of which is connected to the circuit board;

[0022] The tripping mechanism includes a reset button, a linkage rod, and an elastic element movably disposed in the housing. The elastic element abuts against the lower part of the reset button and the corresponding housing. The elastic force of the elastic element causes the reset button to tend to slide out of the housing. The reset button has a snap-fit ​​part for engaging with the locking protrusion. The housing has a through hole, and the linkage rod passes through the through hole to connect to the short circuit device.

[0023] When the test button is pressed to open, the upper contact of the button torsion spring contacts the test spring to form a test circuit. The trip unit can attract the engaging section, causing the latch protrusion to separate from the locking part. The elastic force of the elastic element makes the reset button tend to push the linkage rod, and the linkage rod releases the circuit breaker.

[0024] With the above technical solution, when an electromagnetic tripping structure is in normal use, in the initial state, the lower end contact of the button torsion spring is in contact with the test resistor, and the button torsion spring pushes the test button to remain protruding through the elastic force of the upper contact foot. The test button is not opened, the test circuit is not closed, and the locking protrusion of the armature and the locking part of the reset button are in a locking state.

[0025] During testing, the test button is pressed to activate it. Pressing the button down depresses the upper contact of the torsion spring until it contacts the test spring, connecting the lower contact to the test resistor. The test spring connects to the circuit board. Manual triggering establishes a complete test circuit. The trip unit is energized, attracting the engagement section. The armature rotates accordingly, causing the locking protrusion on the other end of the locking section to disengage from the locking part, releasing the reset button. The elastic force of the spring pushes the reset button upwards. During this sliding process, the reset button contacts and pushes the linkage rod, which in turn releases the circuit breaker, simulating the tripping action during a circuit fault. This maintains a compact structure and ease of operation, improving testing efficiency.

[0026] Preferably, the housing includes a housing base, an outer cover disposed on the housing base, and a housing cover disposed on the housing base. The housing base is provided with a fixing post, and the fixing post passes through the buckle hole.

[0027] The housing is also provided with a mounting post and a stop post. The button torsion spring is sleeved on the mounting post. The mounting post is also provided with a reset torsion spring. One end of the reset torsion spring abuts against the stop post, and the other end acts on the engaging section. The elastic force of the reset torsion spring makes the engaging section tend to separate from the trip unit.

[0028] The above technical solution includes three parts: a housing base, an outer cover, and a housing cover. The housing base is a basic structure that is spliced ​​and fixed to the circuit breaker. The outer cover is installed along the edge contour of the housing base. The housing cover abuts against the side of the outer cover away from the housing base to enclose the internal space and protect the internal structure.

[0029] A reset torsion spring is fitted onto the mounting post, with one end resting against the abutment post for positioning. The abutment post provides a stable fulcrum, allowing the other end to exert a spring force on the engaging section. The spring force of the reset torsion spring must be less than the attraction force of the trip unit to avoid affecting the operation of the trip unit in attracting the engaging section. After the trip unit closes, the engaging section is released, and the spring force of the reset torsion spring pushes the engaging section away from the trip unit, causing the armature to rotate. This allows the locking part to remain engaged with the latching protrusion. At this time, the reset button is in the closed state, ensuring the normal reset of the armature.

[0030] Preferably, the reset button includes a button portion and a push rod portion disposed on the side of the button portion. The button portion has a clearance cavity, the fixing post is located in the clearance cavity, the snap-fit ​​portion is disposed on the side wall of the clearance cavity, the snap-fit ​​portion has a guide surface on one side along the movement direction of the reset button, and the push rod portion is used to push the linkage rod to move.

[0031] Through the above technical solution, the button part is the user's operating part. The position of the fixing post is limited to the relief cavity to avoid the fixing post interfering with the movement of the reset button. The fixing post can abut against the inner wall of the relief cavity on the lower side to restrict the reset button from sliding upward and disengaging. Pressing the reset button allows the locking section to contact and be guided through the guide surface until the locking part cooperates with the locking protrusion. Since the locking part is set on the side wall of the relief cavity, the armature needs the locking section to extend into the relief cavity. The relief cavity provides relief, making the structure more compact.

[0032] Preferably, the housing is formed with abutment portion, and the elastic element includes:

[0033] The first elastic element has a groove on the side of the button part near the abutting part. A protruding post protrudes from the bottom of the groove. One end of the first elastic element abuts against the bottom of the groove and is sleeved on the outside of the protruding post, while the other end abuts against the abutting part.

[0034] The second elastic element has a groove on the side of the push rod near the abutment part. One end of the second elastic element abuts against the bottom of the groove and the other end abuts against the abutment part.

[0035] Through the above technical solution, the abutment part, as an integrally formed part of the housing, has a fixed and unchanging position, providing a base for the abutment support on the lower side of the elastic element. The upper end of the elastic element one is embedded in the groove one, and the lower end abuts against the abutment part. Its elastic force acts on the bottom of the groove one to provide an upward thrust for the reset button. The protrusion protrudes from the bottom of the groove one and passes through the upper opening of the elastic element one, further restricting the swing offset of the elastic element one. Similar to the elastic element one, the upper end of the elastic element two is embedded in the groove two, and the lower end also abuts against the abutment part. Its elastic force acts on the bottom of the groove two to provide more upward thrust for the reset spring. The two elastic elements act on the lower ends of the button part and the push rod part respectively, ensuring the balance of the reset button when subjected to force, reducing the reset deviation caused by uneven force, and improving the pushing effect. The reset button can be reset quickly and accurately.

[0036] Preferably, the outer cover is provided with structural ribs, and the structural ribs are provided with a plurality of receiving parts, each receiving part having receiving holes, the receiving holes corresponding to the outer ends of the fixing column and the mounting column passing through.

[0037] Through the above technical solution, the structural ribs enhance the structural strength of the outer cover, and the distribution of the structural ribs forms a blocking and limiting effect on the trip unit, preventing it from accidentally detaching from the circuit board due to external factors such as vibration and impact, thereby improving the installation stability of the trip unit; the receiving hole of the receiving part is aligned with the end of the fixing post for it to pass through, thereby limiting the button torsion spring sleeved on the fixing post from detaching from the fixing post, thereby improving the installation stability.

[0038] Preferably, the circuit board is connected with power lines and current transformer lines, and a wiring groove is provided between the housing and the outer cover for the power lines and current transformer lines to pass through.

[0039] Through the above technical solution, the wiring trough provides sufficient channel space for power lines and transformer lines, avoiding wear and interference caused by pressing on the lines during the installation of the outer cover. At the same time, the space of the wiring trough ensures that the lines are more stable after passing through, preventing the lines from becoming loose or damaged due to vibration or external force.

[0040] Preferably, the test button has a locking part, and there are several locking parts. A locking groove is left between adjacent locking parts, and the upper contact of the button torsion spring is embedded in the locking groove.

[0041] The housing is provided with an orientation block, the orientation block has an orientation groove, the test button has an anti-detachment part, the anti-detachment part protrudes from the opposite side walls of the test button along the sliding direction, the anti-detachment part is embedded in the orientation groove, and the groove direction of the orientation groove is parallel to the sliding direction of the test button.

[0042] Through the above technical solution, a locking groove is formed between several adjacent locking parts, with the number of locking grooves being one less than the number of locking parts. The upper contact of the button torsion spring can be embedded in any one of the locking grooves, which can change the fitting position and improve applicability. By restricting the upper contact of the button torsion spring within the locking groove, the position of the button torsion spring will not shift during the process of pressing the button and sliding down, thereby improving the stability and reliability of the pressing operation.

[0043] The key and beneficial technical effects of this technical solution compared to existing technologies are:

[0044] 1. This technical solution enhances the structural strength and stability by composing the armature into an engaging section, a ring section, and a locking section. When the trip unit is in operation, the magnetic force attracts the armature engaging section, and the ring section rotates flexibly to drive the locking section to release, thereby disengaging from the reset button and completing the trip. The armature has both locking and tripping functions, optimizing the armature structure and improving durability and reliability. Attached Figure Description

[0045] Figure 1 This is a schematic diagram of the overall structure of this embodiment;

[0046] Figure 2 This is a schematic diagram of the outer cover layer structure in this embodiment;

[0047] Figure 3 This is a schematic diagram of the shell layer structure in this embodiment;

[0048] Figure 4 For this embodiment Figure 3 A magnified view of a portion of the image;

[0049] Figure 5 This is a partial explosion diagram of the housing in the embodiment;

[0050] Figure 6 This is a partial exploded view of the circuit board in the embodiment;

[0051] Figure 7 This is a schematic diagram of the overall structure of the armature component in the embodiment;

[0052] Figure 8 This is a partial cross-sectional view of this embodiment;

[0053] Figure 9 This embodiment Figure 8 Enlarged view of a portion;

[0054] Figure 10 For this embodiment Figure 8 Schematic diagram of the operating structure under test conditions;

[0055] Figure 11This is a schematic diagram of the overall structure of the reset button in the embodiment;

[0056] Figure 12 This is a schematic diagram of the overall structure of the test button in the embodiment.

[0057] Reference numerals: 1. Armature; 11. Suction section; 12. Locking section; 13. Ring section; 2. Locking protrusion; 3. Buckle hole; 4. Joint seam; 5. Housing; 51. Housing base; 52. Outer cover; 53. Housing cover; 6. Circuit board; 7. Tripping device; 8. Test assembly; 81. Test button; 82. Test resistor; 83. Button torsion spring; 84. Test spring; 9. Tripping mechanism; 91. Reset button; 911. Button part; 912. Push rod part; 92. Elastic element; 921. Elastic element one; 922. Elastic... Component 2; 93. Linkage rod; 10. Snap-fit ​​part; 14. Fixing post; 15. Mounting post; 16. Abutting post; 17. Return torsion spring; 18. Relief cavity; 19. Abutting part; 20. Groove 1; 21. Protruding post; 22. Groove 2; 23. Structural rib; 24. Receiving part; 25. Receiving hole; 26. Power cord; 27. Current transformer wire; 28. Wiring trough; 29. ​​Locking part; 30. Locking groove; 31. Orienting block; 32. Orienting groove; 34. Short circuit breaker; 35. Guide surface; 36. Anti-detachment part; 37. Through hole. Detailed Implementation

[0058] The specific implementation of this technical solution will be further described in detail below with reference to the accompanying drawings.

[0059] Example:

[0060] See Figure 7 An armature includes an armature component 1, which comprises three segmented parts. The armature component 1 includes a sequentially connected attracting section 11, a ring-locking section 13, and a locking section 12. The ring-locking section 13 is integrally formed between the attracting section 11 and the ring-locking section 12, so that the armature component 1 can be manufactured and formed through a complete bending process, thereby improving production efficiency and increasing structural strength.

[0061] The cross-sectional width of the engaging section 11 is greater than that of the ring-shaped section 13 connected to it. The larger volume and wider area allow the engaging section 11 to be stably engaged by the tripping device 7 of the electromagnetic tripping structure. The ring-shaped section 13 has a formed snap hole 3 for the fixed post 14 of the electromagnetic tripping structure to pass through, allowing the ring-shaped section 13 to rotatably fit onto the outside of the fixed post 14. The engaging section 11 and the locking section 12 are spaced apart and have a splicing seam 4. When the snap hole 3 is aligned with the fixed post 14 during installation, the engaging sections 11 on both sides are opened... 1. The locking section 12 enlarges the splice seam 4, so that the fixing post 14 can be installed into the cover buckle hole 3, ensuring installation stability and better applicability; the locking section 12 has a locking protrusion 2, which is located at the end of the locking section 12 away from the ring buckle section 13 and on the side of the locking section 12 facing away from the suction section 11, for engaging with the reset button 91 of the electromagnetic release structure. When the suction section 11 is attracted, the ring buckle section 13 will rotate around the fixing post 14, and the locking protrusion 2 will correspondingly move away from the reset button 91 to release.

[0062] The specific work process of this plan is as follows:

[0063] This technical solution uses an armature 1 consisting of a pull-in section 11, a ring-lock section 13, and a locking section 12 connected in sequence. When the trip unit 7 of the electromagnetic trip structure is activated, the magnetic force it generates attracts the pull-in section 11 of the armature 1, and the two are tightly attracted. The armature 1 rotates as a whole, driving the locking section 12 to perform a release action. The locking protrusion 2 at the end of the locking section 12 is successfully released from the reset button 91 of the electromagnetic trip structure. The armature has both a locking function and a release function after being attracted, improving durability and reliability.

[0064] See Figure 1 An electromagnetic tripping structure includes a housing 5 and a circuit breaker 34. The housing 5 includes a housing base 51, an outer cover 52, and a housing cover 53. One side of the housing base 51 is spliced ​​onto the circuit breaker 34. The outer cover 52 is installed on the side of the housing base 51 away from the circuit breaker 34, and the housing cover 53 is installed on the side of the outer cover 52 away from the housing base 51, thus abutting against the outer side of the outer cover 52 to cover the internal space. The housing 5 is fixed by bolts passing through the housing cover 53 and the outer cover 52 and being threaded into the bolt holes of the housing base 51. A test button 81 and a reset button 91 are provided on the side of the housing 5. The test button 81 is positioned below the reset button 91. Both the test button 81 and the reset button 91 are slidably disposed relative to the housing 5 and can be pressed to switch between open and closed states.

[0065] See Figure 3 , Figure 4 and Figure 5The circuit board 6 is installed inside the housing 5, and its shape is adapted to the internal space of the housing 51. The housing 51 is provided with a fixing post 14, which extends away from the housing 51 and toward the housing cover 53. The armature 1 is sleeved on the fixing post 14 through the buckle hole 3. The circuit board 6 is provided with a trip unit 7, which is used to attract the closing section 11 to drive the armature 1 to close after power is applied.

[0066] It also includes a test component 8 and a tripping mechanism 9. The test component 8 includes the test button 81, a test resistor 82, a button torsion spring 83, and a test spring 84. The side wall of the housing 5 has a button opening for the test button 81 to pass through, facilitating pressing. In this embodiment, the button opening is formed by joining grooves on opposite side walls of the housing 51 and the outer cover 52. The test button 81 engages with the button opening, its lower end located inside the housing 5. Figure 11 As shown, the test button 81 has an anti-detachment part 36, which includes two parts that protrude from opposite outer walls of the test button 81 along the sliding direction. After the side of the test button 81 is embedded in the groove of the housing 51, the outer cover 52 is then closed. The groove corresponding to the side wall of the outer cover 52 is spliced ​​with the groove of the housing 51. Based on the fact that the channel cross-section of the button opening matches the cross-sectional size of the upper part of the test button 81, the anti-detachment parts 36 on both sides abut against the corresponding end faces of the inner side of the housing 51 and the outer cover 52 when the test button 81 slides, so as to restrict its sliding away from the housing 5.

[0067] The housing 51 is provided with an directional block 31, which protrudes and is fixed to the side wall of the housing 51 near the housing cover 53. Its position corresponds to the test button 81. The directional block 31 has an directional groove 32, which is parallel to the sliding direction of the test button 81 and has a through opening on the side facing the test button 81. When the test button 81 is installed, its lower side is precisely embedded in the directional groove 32, so that when sliding, it follows the direction of the directional groove 32, thereby limiting the swing of its lower end in the housing 5 and improving stability. The test button 81 has a locking part 29, which includes several and is located at the lower part of the test button 81. In this embodiment, four locking parts 29 are shown in total, and a locking groove 30 is left between adjacent locking parts 29.

[0068] The upper contact of the button torsion spring 83 is embedded in one of the slots 30 and acts elastically on the test button 81, causing it to tend to move outward from the housing 5. The lower contact of the other end of the button torsion spring 83 abuts against the test resistor 82 and remains connected to the test resistor 82. The test resistor 82 is connected to the circuit board 6. The housing 51 is provided with a mounting post 15, which extends away from the housing 51 toward the housing cover 53. The button torsion spring 83 is positioned on the mounting post 15. One end of the test spring 84 is connected to the circuit board 6, and the other end is on the movement path of the upper contact of the button torsion spring 83. When the test button 81 is pressed to open, the test button 81 presses down on the upper contact of the button torsion spring 83, causing it to approach and abut against the terminal of the test spring 84 to form a test circuit.

[0069] A reset torsion spring 17 is also fitted on the mounting post 15, which is located inside the button torsion spring 83. The housing 51 is also provided with an abutment post 16. One end of the reset torsion spring 17 is positioned against the abutment post 16, and the other end extends to the gap between the engaging section 11 and the trip unit 7. It is used to act on the engaging section 11 and make it tend to separate from the trip unit 7 through elastic force. Its elastic force is always less than the attraction force of the trip unit 7, ensuring that the engaging section 11 can be properly engaged.

[0070] The circuit board 6 is connected to a power line 26 and a current transformer line 27. A wiring groove 28 is formed between the housing 51 and the outer cover 52 to allow the power line 26 and the current transformer line 27 to pass through. In this embodiment, the wiring groove 28 is opened in the housing 51. The wiring groove 28 and the corresponding plane side wall of the outer cover 52 form a channel for the lines to pass through. The power line 26 is used to connect the power supply, and the current transformer line 27 is used to connect the current transformer. After the current transformer senses the residual current signal and meets the triggering conditions of the electronic component board, the trip unit 7 attracts the armature. Alternatively, the wiring groove 28 can also be opened on one side of the outer cover 52, or partial wiring grooves 28 can be opened on the opposite end faces of the housing 51 and the outer cover 52.

[0071] The tripping mechanism 9 includes a reset button 91, a linkage rod 93, and an elastic element 92. A second button opening, allowing the reset button 91 to pass through, is provided on the side wall of the housing 5 for easy pressing. The second button opening operates on the same principle as the first button opening. The reset button 91 and the test button 81 are spaced apart along the length of the housing 5 on the side wall of the housing 5. Figure 12 As shown, the reset button 91 includes a button part 911 and a push rod part 912. The push rod part 912 is disposed on the side of the button part 911. The button part 911 has a relief cavity 18. The fixing post 14 is located in the relief cavity 18. The reset button 91 has a snap-fit ​​part 10, which is disposed on the side wall of the relief cavity 18. The snap-fit ​​part 10 is used to engage with the locking protrusion 2. The snap-fit ​​part 10 has a guide surface 35 on the lower side along the movement direction of the reset button 91.

[0072] One end of the linkage rod 93 extends to one side of the push rod portion 912 along the sliding direction of the reset button 91. The housing 51 in the housing 5 has a through hole 37, which connects to the short circuit 34. The other end of the linkage rod 93 passes through the through hole 37 and connects to the short circuit 34.

[0073] The housing 51 has a backing portion 19, which is plate-shaped and located inside the reset button 91 along the sliding direction. The elastic element 92 includes an elastic element 1 921 and an elastic element 2 921, both of which are preferably springs. The reset button 91 has a groove 20 located on the side of the button portion 911 near the backing portion 19. A protruding post 21 protrudes from the bottom of the groove 20. The dividing grooves make the protruding post 21 partially have grooves 20 on both sides. One end of the elastic element 1 921 is inserted into the groove 20 and abuts against the bottom of the groove 20. At this time, the end is looped around the protruding post. On the outer side of 21, the other end of the elastic element 921 abuts against the corresponding end face of the abutting part 19; the reset button 91 is also provided with a groove 22, which is located on the same side of the reset button 91 where the groove 20 is provided and is provided on the side of the push rod part 912 near the abutting part 19. One end of the elastic element 921 is embedded in the groove 22 and abuts against the bottom of the groove 22, and the other end abuts against the corresponding end face of the abutting part 19; based on the fixed abutting part 19, the elastic element 921 and the elastic element 921 cooperate to make the elastic force act on the reset button 91, so that it has the tendency to move out of the housing 5 through the button opening 2.

[0074] See Figure 8 , Figure 9 and Figure 10 When testing is required, firstly, the test button 81 is pressed into the open state. The test button 81 presses down the button torsion spring 83, and the upper contact of the button torsion spring 83 abuts against the test spring 84. The lower contact of the button torsion spring 83 is connected to the test resistor 82, forming a test circuit. The trip unit 7 attracts the engaging section 11, and the engaging section 11 overcomes the elastic force of the return spring and approaches the trip unit 7. The armature 1 rotates around the mounting post 15 through the ring section 13. At this time, the locking protrusion 2 on the other end of the locking section releases the locking part 10. In the current state, the pusher of the reset button 91 by the elastic element 1 921 and the elastic element 2 921 moves outward, causing the push rod 912 of the reset button 91 to push the linkage rod 93. The linkage rod 93 moves along the length of the through hole 37, triggering the circuit breaker 34 on the other side to trip, thus achieving a trip. The circuit breaker 34 is prior art; for details, please refer to the snap-action circuit breaker disclosed in patent publication number CN117038411A, which will not be elaborated here. The main components related to this solution include the tripping mechanism 9 and the patent. Figure 1 The waist-shaped hole on the side wall of the inner shell is aligned and connected with the through hole 37 of this application. The linkage 93 is associated with the tripping mechanism 9 through the through hole 37 and the waist-shaped hole.

[0075] When the release test button 81 is in the closed state, after the trip, press the reset button 91 again. The locking part 10 of the reset button 91 contacts the latching protrusion 2 through the guide surface 35. The locking part 10 re-establishes a latch with the latching protrusion 2, and the circuit can be re-closed.

[0076] See Figure 2 The outer cover 52 is provided with structural ribs 23, and multiple receiving parts 24 are provided on the structural ribs 23. Each receiving part 24 is set at the node of the structural rib 23. Each receiving part 24 is provided with a receiving hole 25. When the outer cover 52 is installed, some of the structural ribs 23 are distributed on the outside of the trip unit 7 away from the circuit board 6, forming a blocking effect on the trip unit 7 to limit its swing and fall. Each receiving hole 25 is aligned with the position of the fixing post 14 and the mounting post 15, so that the ends of the fixing post 14 and the mounting post 15 pass through the corresponding receiving hole 25, thereby limiting the release of the button torsion spring 83 and the armature 1 and improving the stability of use.

[0077] The specific work process of this plan is as follows:

[0078] This technical solution ensures that, in the initial state, the button torsion spring 83 keeps its lower contact in contact with the test resistor 82, while the test button 81 is pushed out but not opened, the test circuit is not closed, and the armature latch protrusion 2 is engaged with the reset button 91. When testing is required, pressing the test button 81 causes it to press down the upper contact of the button torsion spring 83 to the test spring 84, forming a complete test circuit. When the trip unit 7 is energized, it attracts the armature 1 to rotate, causing the latch protrusion 2 to disengage from the reset button 91. The elastic force of the elastic element 92 pushes the reset button 91 to slide upward. During this process, the reset button 91 contacts and pushes the linkage rod 93 to perform a tripping operation on the circuit breaker 34, simulating a tripping action, ensuring convenient operation and efficient testing.

[0079] The foregoing has shown and described the basic principles, main features, and advantages of this technical solution. Those skilled in the art should understand that this technical solution is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this technical solution. Various changes and modifications can be made to this technical solution without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed technical solution. The scope of protection of this technical solution is defined by the appended claims and their equivalents.

Claims

1. An armature, comprising an armature component (1), characterized in that... The armature (1) includes: The engaging section (11) is used to engage with the trip unit of the electromagnetic tripping structure; The locking section (12) has a locking protrusion (2) at its end, which is used to engage with the reset button of the electromagnetic release structure, so that the armature (1) is in the locking state; The ring-shaped section (13) is connected between the suction section (11) and the locking section (12). The ring-shaped section (13) is formed with a buckle hole (3) for the fixing post to pass through and for the ring-shaped section (13) to rotate and be fitted on the outside of the fixing post. When the suction section (11) is suctioned, the armature (1) rotates through the ring-shaped section (13) to drive the locking section (12) to unlock.

2. The armature according to claim 1, characterized in that: The ring-shaped section (13) is integrally formed between the suction section (11) and the locking section (12).

3. An armature according to claim 1, characterized in that: The suction section and the locking section (12) are spaced apart and have a splicing seam (4).

4. An electromagnetic tripping structure, comprising a housing (5) and a short circuit breaker (34) spliced ​​to one side of the housing (5), wherein a circuit board (6) is installed inside the housing (5), and a tripping device (7) is installed on the circuit board (6), the tripping device (7) being used to attract the engaging section (11) after being energized, characterized in that, It also includes the armature as described in any one of claims 1 to 3, and further includes a test assembly (8) and a tripping mechanism (9), said test assembly (8) comprising: A test button (81) is movably disposed on the housing (5), and the test button (81) can be switched between an open state and a closed state; A test resistor (82) is provided on the circuit board (6); A button torsion spring (83), the upper contact of which applies a preload to the test button (81), and the lower contact of which abuts against the test resistor (82); and A test spring (84) is connected at one end to the circuit board (6); The tripping mechanism (9) includes a reset button (91), a linkage rod (93), and an elastic element (92) movably disposed in the housing (5). The elastic element (92) abuts against the lower part of the reset button (91) and the corresponding housing (5). The elastic force of the elastic element (92) causes the reset button (91) to have a tendency to slide out of the housing (5). The reset button (91) has a snap-fit ​​part (10) for engaging with the locking protrusion (2). The housing (5) has a through hole (37). The linkage rod (93) passes through the through hole (37) and connects to the short circuit device (34). When the test button (81) is pressed to open, the upper contact of the button torsion spring (83) contacts the test spring (84) to form a test circuit. The trip unit (7) can attract the engaging section (11), causing the latch protrusion (2) to separate from the snap-fit ​​part (10). The elastic force of the elastic element (92) causes the reset button (91) to have a tendency to push the linkage rod (93), and the linkage rod (93) releases the short circuit device (34).

5. The electromagnetic tripping structure according to claim 4, characterized in that: The housing (5) includes a housing base (51), an outer cover (52) disposed on the housing base (51), and a housing cover (53) disposed on the housing base. The housing base (51) is provided with a fixing post (14), and the fixing post (14) passes through the buckle hole (3). The housing (51) is also provided with a mounting post (15) and a stop post (16). The button torsion spring (83) is sleeved on the mounting post (15). The mounting post (15) is also provided with a reset torsion spring (17). One end of the reset torsion spring (17) abuts against the stop post (16) and the other end acts on the engaging section (11). The elastic force of the reset torsion spring (17) makes the engaging section (11) tend to separate from the trip unit (7).

6. The electromagnetic tripping structure according to claim 5, characterized in that: The reset button (91) includes a button part (911) and a push rod part (912) disposed on the side of the button part (911). The button part (911) has a relief cavity (18). The fixing post (14) is located in the relief cavity (18). The snap-fit ​​part (10) is disposed on the side wall of the relief cavity (18). The snap-fit ​​part (10) has a guide surface (35) on one side along the movement direction of the reset button (91). The push rod part (912) is used to push the linkage rod (93) to move.

7. The electromagnetic tripping structure according to claim 6, characterized in that: The housing (51) is formed with abutment portion (19), and the elastic element (92) includes: The first elastic element (921) has a groove (20) on the side of the button part (911) near the abutting part (19). The bottom of the groove (20) has a protruding post (21). One end of the first elastic element (921) abuts against the bottom of the groove (20) and is sleeved on the outside of the protruding post (21), while the other end abuts against the abutting part (19). The second elastic element (922) has a groove (22) on the side of the push rod part (912) near the abutment part (19). One end of the second elastic element (922) abuts against the bottom of the groove (22) and the other end abuts against the abutment part (19).

8. The electromagnetic tripping structure according to claim 5, characterized in that: The outer cover (52) is provided with structural ribs (23), and the structural ribs (23) are provided with a plurality of receiving parts (24). The receiving parts (24) have receiving holes (25), and the receiving holes (25) are respectively for the outer ends of the fixing column (14) and the mounting column (15) to pass through.

9. An electromagnetic tripping structure according to claim 5, characterized in that: The circuit board (6) is connected to a power line (26) and a transformer line (27). A wiring groove (28) is provided between the housing (51) and the outer cover (52) for the power line (26) and the transformer line (27) to pass through.

10. An electromagnetic tripping structure according to claim 5, characterized in that: The test button (81) has a locking part (29), and there are several locking parts (29). A locking groove (30) is left between adjacent locking parts (29). The upper contact of the button torsion spring (83) is embedded in the locking groove (30). The housing (51) is provided with an orientation block (31), the orientation block (31) has an orientation groove (32), the test button (81) has an anti-detachment part (36), the anti-detachment part (36) protrudes from the opposite side walls of the test button (81) along the sliding direction, the side of the test button (81) is embedded in the orientation groove (32), the anti-detachment part (36) is embedded in the orientation groove (32), and the groove direction of the orientation groove (32) is parallel to the sliding direction of the test button (81).

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