Button tripping structure of circuit breaker

Abstract

The technical scheme belongs to the technical field of circuit breakers, and particularly relates to a button tripping structure of a circuit breaker, which comprises a shell, a short-circuiting device, a tripper and a testing mechanism, the testing mechanism forms a loop to attract an armature after being electrified, the tripping structure is arranged in the shell and is linked with the testing mechanism, and the button tripping structure comprises a reset button, a linkage rod, an elastic piece and the armature. The reset button slides at a button opening in the side wall of the shell and is provided with a clamping part; the other end of the linkage rod penetrates through the through hole of the shell and is connected with the short-circuiting device; the elastic piece abuts against the reset button and the inner wall of the shell, so that the reset button tends to move towards the linkage rod, the armature is hinged to the interior of the shell, a lock catch protrusion is arranged and can be switched between a first position and a second position around a shaft, at the beginning, the armature is opened at the first position, and a clamping part of the lock catch protrusion limits the reset button. When the circuit breaker is released, the lock catch protrusion is released from the clamping portion, the elastic piece pushes the reset button to slide to the button opening, the linkage rod moves along with the reset button to release the circuit breaker, and releasing is smooth and efficient.

Description

Technical Field

[0001] This technical solution relates to the field of circuit breaker technology, and specifically refers to a push-button tripping structure for a circuit breaker. 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 CN102243946A discloses a high breaking capacity residual current operated circuit breaker, including a base, a top cover, a current transformer, an electronic component board, an electronic trip unit, and an operating mechanism. The operating mechanism includes a traction rod, a fixed shaft, and a spring. The traction rod is L-shaped, with a cylindrical platform formed at the bend of the L-shaped traction rod. A through hole is formed on the cylindrical platform to be adapted to connect with the fixed shaft. The long side of the traction rod is longitudinally located on the right side of the electronic component board, and its top end is close to the top rod of the electronic trip unit. The other short side of the L-shaped traction rod is formed on the right side of its long side. A connecting rod is formed on the outer side of the top end of the short side of the L-shaped traction rod. The spring is set on the cylindrical platform to reset the traction rod. The electronic component board controls the electronic trip unit to trip, pushing the traction rod to move. The traction rod drives the circuit breaker to complete the tripping.

[0004] Currently, residual current operated circuit breakers on the market use multiple rod structures, such as traction rods and connecting rods, to drive the reset rod. This places higher power requirements on the trip unit and results in a relatively complex structure, which needs improvement. Summary of the Invention

[0005] To address the issue that the complex structure of the trip unit, which relies on pushing a traction rod to complete the tripping, results in high power requirements for the trip unit, this technical solution provides a push-button tripping structure for a circuit breaker.

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

[0007] A push-button tripping structure for a circuit breaker includes a housing, a short circuit breaker attached to one side of the housing, a tripping device disposed within the housing, and a testing mechanism. The testing mechanism forms a circuit so that the tripping device, when energized, attracts an armature. The side wall of the housing has a push-button opening and also includes a tripping structure disposed within the housing and linked to the testing mechanism. The tripping structure includes:

[0008] A reset button is provided at the button opening and is slidably disposed relative to the housing; the reset button has a snap-fit ​​portion.

[0009] A linkage rod is provided, and the housing has a through hole. One end of the linkage rod extends to the side of the sliding direction of the reset button, and the other end passes through the through hole and is connected to the short circuit breaker.

[0010] The elastic element has one end abutting against the lower part of the reset button and the other end abutting against the inner wall of the corresponding housing. The elastic force of the elastic element causes the reset button to tend to move toward the linkage rod.

[0011] An armature, hinged within the housing, has a locking protrusion. The armature switches between a first position and a second position around the hinge axis. When the armature is in the first position, it is in an open state, with the locking protrusion engaging with the locking part. When the armature is in the second position, it is in a closed state, with the locking protrusion disengaging from the locking part. This allows the elastic element to drive the reset button to push the linkage rod to release the circuit breaker.

[0012] With the above technical solution, when a circuit breaker button tripping structure is in normal use, in the initial state, the armature is in the first position, the front end of the armature is in the open state and the tripping device is kept at a distance, and the locking protrusion at the rear end of the armature is engaged and limited with the locking part to limit the elastic force of the elastic element from pushing the reset button to slide and protrude towards the button opening, thus keeping the reset button closed.

[0013] During testing, a circuit is formed by operating the test mechanism. The trip unit attracts the armature, causing it to rotate around the hinge axis and switch to the second position. During this process, the locking protrusion disengages from the locking part, releasing the reset button. The elastic force of the elastic element releases the reset button, causing it to slide upwards toward the button opening. During this sliding process, the reset button contacts and pushes the linkage rod to move along the through hole. Since the other end of the linkage rod is connected to the circuit breaker, the linkage rod performs a tripping operation on the circuit breaker. The entire tripping process is smoother and more efficient, reducing the power requirements of the trip unit and improving the efficiency and reliability of the tripping operation.

[0014] Preferably, the housing includes a housing base, an outer cover disposed on the housing base, and a housing cover disposed on the outer cover, wherein the housing base is provided with a fixing post;

[0015] The armature includes an engaging section for engaging with the trip unit, a retaining ring section, and a locking section for engaging with the locking part. The locking section is provided with a locking protrusion. The retaining ring section is connected between the engaging section and the locking section. The retaining ring section has an annular groove, and the fixing post passes through the annular groove.

[0016] Through the above technical solution, the housing includes three parts: the housing base, the outer cover, and the housing cover. The housing base is the basic structure 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. The armature is composed of an attraction section, a retaining ring section, and a locking section connected as a whole to improve the structural strength and stability. The attraction section is electromagnetically attracted by the trip unit. The retaining ring section is sleeved on the fixed post through a ring groove to realize the fixed positioning of the armature and swing around the fixed post as a rotation axis. The armature not only has a locking function, but also drives the circuit breaker to trip after attraction by unlocking and resetting the button, improving practicality.

[0017] Preferably, the reset button includes a button portion and a push rod portion disposed on the side of the button portion, the button portion having a relief cavity, the fixing post being located in the relief cavity, and the snap-fit ​​portion being disposed on the side wall of the relief cavity;

[0018] The latching part has a guide surface on one side along the direction of movement of the reset button, and the push rod part can push the linkage rod to move.

[0019] 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.

[0020] Preferably, the housing is formed with abutment portion, and the elastic element includes:

[0021] 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.

[0022] 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.

[0023] 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 first elastic element is embedded in the first groove, and the lower end abuts against the abutment part. Its elastic force acts on the bottom of the groove to provide an upward thrust for the reset button. The protrusion protrudes from the bottom of the groove and passes through the upper opening of the first elastic element, further restricting the swing offset of the first elastic element. Similar to the first elastic element, the upper end of the second elastic element is embedded in the second groove, and the lower end also abuts against the abutment part. Its elastic force acts on the bottom of the second groove to provide more upward thrust for the reset button. 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.

[0024] Preferably, the housing is provided with a stop bar, which is located on one side of the housing along the direction of the push rod pushing the connecting rod, and is used to abut against the push rod.

[0025] Through the above technical solution, a stop bar is added to the housing, which acts to abut against the top side of the push rod, thereby limiting the excessive movement or deviation of the push rod during the process of pushing the linkage.

[0026] Preferably, it also includes a circuit board installed inside the housing. The circuit board is connected to power lines and current transformer lines. The housing also has a second button port. The testing mechanism includes:

[0027] A test button is located at the second button opening and is slidably disposed relative to the housing.

[0028] A test resistor, which is mounted on the circuit board;

[0029] A button torsion spring, wherein the upper contact of the button torsion spring applies a preload to the test button, and the lower contact at the other end abuts against the test resistor;

[0030] A test spring is connected at one end to the circuit board. When the test button is pressed, the test button drives the button torsion spring so that its upper contact pin contacts the test spring. The button torsion spring, the test spring, and the test resistor work together to form a test circuit.

[0031] Through the above technical solution, the power lines and transformer lines connected on the circuit board ensure that the electrical protection system receives power signals and current signals transmitted by the transformers. The test resistor, trip unit, and test spring are directly connected to the circuit board, which is then installed inside the housing. The upper contact of the button torsion spring applies preload to the test button to ensure that the button protrudes from the outer wall of the housing through the button opening. The lower contact of the button torsion spring remains connected to the test resistor. Pressing the test button triggers the test function. The test button presses down on the upper contact of the button torsion spring until it contacts the test spring to form a test circuit, thereby energizing the trip unit and attracting the armature to achieve the closing operation. This reduces the complex wiring and connection points in traditional circuit breakers, reduces physical wear and failure risks caused by messy wiring, and improves operational stability.

[0032] Preferably, the housing is provided with a stop post and a mounting post. A reset torsion spring and the button torsion spring are sleeved on the mounting post. 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.

[0033] The above technical solution involves installing a reset torsion spring on the mounting post. One end of the spring is positioned against the abutment post, which 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.

[0034] 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.

[0035] 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.

[0036] 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.

[0037] Preferably, a wiring groove is formed between the housing and the outer cover to allow the power supply line and the transformer line to pass through.

[0038] 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.

[0039] Preferably, the outer cover is provided with structural ribs, which are distributed on the side of the trip unit away from the circuit board; the structural ribs are provided with receiving parts, which have receiving holes.

[0040] 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.

[0041] The key and beneficial technical effects of this technical solution compared to existing technologies are:

[0042] 1. This technical solution achieves a highly efficient and smooth tripping process by forming a circuit through the testing mechanism during testing, causing the trip unit to attract the armature to rotate, the locking protrusion to disengage from the locking part, releasing the elastic force of the elastic element to push the reset button to slide, and then driving the linkage rod to release the circuit breaker. This reduces the power requirements of the trip unit and improves the efficiency and reliability of the release operation. Attached Figure Description

[0043] Figure 1 This is a schematic diagram of the overall structure of this embodiment;

[0044] Figure 2 This is a schematic diagram of the outer cover layer structure in this embodiment;

[0045] Figure 3 This is a schematic diagram of the shell layer structure in this embodiment;

[0046] Figure 4 This embodiment Figure 3 Enlarged view of a portion;

[0047] Figure 5 This is a partial explosion diagram of this embodiment;

[0048] Figure 6 This is a partial cross-sectional view of this embodiment;

[0049] Figure 7 This embodiment Figure 6Enlarged view of a portion;

[0050] Figure 8 For this embodiment Figure 7 A schematic diagram under test conditions;

[0051] Figure 9 This is a schematic diagram of the overall structure of the reset button in the embodiment;

[0052] Figure 10 This is a schematic diagram of the overall structure of the test button in the embodiment;

[0053] Figure 11 This is a schematic diagram of the overall structure of the armature in the embodiment.

[0054] Reference numerals: 1. Housing; 101. Housing base; 102. Outer cover; 103. Housing cover; 2. Short circuit breaker; 3. Trip unit; 4. Test mechanism; 41. Test button; 42. Test resistor; 43. Button torsion spring; 44. Test spring; 5. Button port one; 61. Reset button; 611. Button part; 612. Push rod part; 62. Linkage rod; 63. Elastic element; 631. Elastic element one; 632. Elastic element two; 64. Armature; 641. Contact section; 642. Snap ring section; 643. Locking section; 7. Snap-fit ​​part; 8. Through 9. Hole; 10. Locking protrusion; 11. Fixing post; 12. Return torsion spring; 13. Ring groove; 14. Relief cavity; 15. Guide surface; 16. Abutting part; 17. Groove one; 18. Protruding post; 19. Groove two; 20. Stop bar part; 21. Circuit board; 22. Power cord; 23. Current transformer wire; 24. Button port two; 25. Abutting post; 26. Mounting post; 27. Locking part; 28. Locking groove; 29. ​​Orienting block; 30. Orienting groove; 31. Wiring groove; 32. Structural rib; 33. Receiving part; 34. Receiving hole; 35. Anti-detachment part. Detailed Implementation

[0055] The specific implementation of this technical solution will be further described in detail below with reference to the accompanying drawings.

[0056] Example:

[0057] See Figure 1 A push-button tripping structure for a circuit breaker includes a housing 1 and a circuit breaker 2. The housing 1 includes three parts: a housing base 101, an outer cover 102, and a housing cover 103. The housing base 101 is spliced ​​with the circuit breaker 2. The outer cover 102 is located on the side of the housing base 101 away from the circuit breaker 2 and is arranged around the edge of the housing base 101. The housing cover 103 is installed on the outer side of the outer cover 102 away from the housing base 101 and covers the internal space. Bolts are passed through holes on the housing cover 103 and the outer cover 102 until the bolts are threaded into the bolt holes on the housing base 101 and fixed to form the housing 1 as a whole.

[0058] See Figure 3 , Figure 4 and Figure 5 A circuit board 20 is installed inside the housing 1, and its shape matches the internal space of the housing base 101. A trip unit 3 is installed on the circuit board 20, which is fixed by contact pins passing through the circuit board 20 and soldered. A power line 21 and a current transformer line 22 are connected to the circuit board 20. A wiring groove 30 is formed between the housing base 101 and the outer cover 102 for the power line 21 and the current transformer line 22 to pass through. In this embodiment, the wiring groove 30 is opened in the housing base 101. The wiring groove 30 and the corresponding plane side wall of the outer cover 102 form a channel for the circuit to pass through. The power line 21 is used to connect the power supply, and the current transformer line 22 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 3 attracts the armature 64. Alternatively, the wiring groove 30 can also be opened on one side of the outer cover 102, or a portion of the wiring groove 30 can be opened on the opposite end faces of the housing base 101 and the outer cover 102.

[0059] The housing 1 also includes a testing mechanism 4, which comprises a test button 41, a test resistor 42, a button torsion spring 43, and a test spring 44. A button opening 23 is provided on the side wall of the housing 1. In this embodiment, the button opening 23 is formed by splicing the grooves on the opposite side walls of the housing base 101 and the outer cover 102. The test button 41 is engaged within the button opening 23, with its lower end located inside the housing 1 and sliding relative to the housing 1. Figure 10 As shown, the test button 41 has an anti-detachment part 34. The anti-detachment part 34 includes two parts that protrude from the outer walls of opposite sides of the test button 41 along the sliding direction. After the side of the test button 41 is embedded into the groove in the housing 101, the outer cover 102 is then closed. The groove corresponding to the side wall of the outer cover 102 is spliced ​​with the groove of the housing 101. The cross-sectional area of ​​the button opening matches the cross-sectional size of the upper part of the test button 41. When the test button 41 slides, the anti-detachment parts 34 on both sides abut against the corresponding end faces of the inner side of the housing 101 and the outer cover 102, respectively, to restrict its sliding away from the housing 1.

[0060] The housing 101 is also provided with an directional block 28, which protrudes and is fixed to the side wall of the housing 101 near the housing cover 103. Its position corresponds to the test button 41. It has an directional groove 29, and the groove is parallel to the sliding direction of the test button 41. The directional groove 29 is open on the side facing the test button 41. When the test button 41 is installed, its lower side is just embedded in the directional groove 29. The directional groove 29 restricts the lower end of the test button 41 from swinging in the housing 1 relative to the inner walls on both sides, thereby improving stability. The test button 41 has a locking part 26, which includes several and is located at the lower part of the test button 41. In this embodiment, four locking parts 26 are shown in total. A locking groove 27 is left between adjacent locking parts 26.

[0061] The housing 101 is provided with a mounting post 25 extending toward the housing cover 103. A button torsion spring 43 is fitted onto the mounting post 25. The upper contact of the button torsion spring 43 is embedded in one of the slots 27 and acts elastically on the test button 41, causing it to tend to move out of the housing 1. The lower contact of the other end of the button torsion spring 43 abuts against the test resistor 42 and remains in a continuous state with the test resistor 42. The test resistor 42 is connected to the circuit board 20. One end of the test spring 44 is connected to the circuit board 20, and the other end extends to the movement path of the upper contact of the button torsion spring 43, so that the upper contact of the button torsion spring 43 can rotate to contact the test spring 44, thereby forming a test circuit.

[0062] It also includes a tripping structure, which is housed within the housing 1 and linked to the testing mechanism 4. The tripping structure includes a reset button 61, a linkage rod 62, an elastic element 63, and an armature 64, such as Figure 11 As shown, the armature 64 includes a suction section 641, a retaining ring section 642, and a locking section 643 connected in sequence. The retaining ring section 642 is integrally formed between the suction section 641 and the retaining ring section 642, so that the armature 64 can be manufactured and formed by a complete bending process. The suction section 641 can be stably suctioned by the release device 3. The retaining ring section 642 has an annular groove 12. The housing 101 is provided with a fixing post 10, which extends toward the housing cover 103. The annular groove 12 of the retaining ring section 642 is aligned with the position of the fixing post 10 for it to pass through, so that the armature 64 is hinged in the housing 1. The armature 64 has a locking protrusion 9, which is provided at the end of the locking section 643 away from the retaining ring section 642.

[0063] A reset torsion spring 11 is also fitted on the fixed post 10, which is located inside the button torsion spring 43. The housing 101 is also provided with an abutment post 24. One end of the reset torsion spring 11 is positioned against the abutment post 24, and the other end extends to the gap between the engaging section 641 and the trip unit 3. It is used to act on the engaging section 641 and make it tend to separate from the trip unit 3 through elastic force. Its elastic force is always less than the attraction force of the trip unit 3, ensuring that the engaging section 641 can be properly engaged.

[0064] The side wall of housing 1 is provided with button port 5. Button port 5 operates on the same principle as button port 23. Reset button 61 is installed in button port 5, and it and test button 41 are distributed at intervals along the length of housing 1 on the side wall of housing 1. Figure 9 As shown, the reset button 61 includes a button part 611 and a push rod part 612. The push rod part 612 is disposed on the side of the button part 611. The button part 611 has a relief cavity 13. The fixing post 10 is located in the relief cavity 13. The reset button 61 has a snap-fit ​​part 7, which is disposed on the side wall of the relief cavity 13. The snap-fit ​​part 7 is used to engage with the locking protrusion 9. The snap-fit ​​part 7 has a guide surface 14 on the lower side along the movement direction of the reset button 61.

[0065] The elastic element 63 includes an elastic element 1 631 and an elastic element 2 632. Both the elastic element 1 631 and the elastic element 2 632 are preferably springs. The reset button 61 has a groove 16 located on the side of the button part 611 near the abutting part 15. A protruding post 17 protrudes from the bottom of the groove 16. The dividing grooves make the protruding post 17 have a portion of the groove 16 on both sides. One end of the elastic element 1 631 is inserted into the groove 16 and abuts against the bottom of the groove 16. At this time, the end is looped around the outside of the protruding post 17. The housing 101 is formed with an abutting part 15, which is in the shape of a plate and is located on the inner side of the reset button 61 along the sliding direction. The other end of the elastic element 1 631 abuts against the corresponding end face of the abutting part 15.

[0066] The reset button 61 also has a second groove 18, which is located on the same side of the reset button 61 where the first groove 16 is provided and is located on the side of the push rod part 612 near the abutment part 15. One end of the second elastic member 632 is embedded in the second groove 18 and abuts against the bottom of the second groove 18, and the other end abuts against the corresponding end face of the abutment part 15. Based on the fixed abutment part 15, the first elastic member 631 and the second elastic member 632 cooperate to make the elastic force act on the reset button 61, so that it has the tendency to move out of the housing 1 through the button opening 5.

[0067] The housing 101 is provided with a stop lever portion 19, which is located on one side of the housing 101 along the direction of the push rod portion 612 pushing the linkage rod 62. It is used to abut against the push rod portion 612 to limit the elastic force of the elastic member 63 from pushing the reset button 61 to move excessively.

[0068] One end of the linkage rod 62 extends to one side of the push rod portion 612 along the sliding direction of the reset button 61. The housing base 101 in the housing 1 has a through hole 8, which connects to the circuit breaker 2. The other end of the linkage rod 62 passes through the through hole 8 and connects to the circuit breaker 2. The circuit breaker 2 is prior art; for details, please refer to the snap-action circuit breaker disclosed in patent publication number CN117038411A. It will not be elaborated upon here. The main components related to this solution include the tripping mechanism 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 8 of this application. The linkage rod 62 passes through the through hole 8 and the waist-shaped hole and is associated with the tripping mechanism.

[0069] See Figure 6 , Figure 7 and Figure 8When testing is required, firstly, the test button 41 is pressed into the open state. The test button 41 presses down the button torsion spring 43, and the upper contact of the button torsion spring 43 abuts against the test spring 44. The lower contact of the button torsion spring 43 is connected to the test resistor 42, forming a test circuit. The trip unit 3 attracts the engaging section 641. The engaging section 641 overcomes the elastic force of the reset torsion spring 11 and approaches the trip unit 3. The armature 64 rotates around the mounting post 25 through the retaining ring section 642. At this time, the armature 64 is in the second position and is in the engaging state. The locking protrusion 9 on the locking section at the other end and the locking part 7 are released from the locking state. The elastic element 1 631 and the elastic element 2 632 push the reset button 61 to move outward, so that the push rod part 612 of the reset button 61 pushes the connecting rod 62. The connecting rod 62 moves along the length direction of the through hole 8. The connecting rod 62 triggers the short circuit 2 on the other side to trip, realizing the trip.

[0070] When the release test button 41 is in the closed state, the trip unit 3 loses its magnetic attraction to the pull-in section 641, the armature 64 switches to the first position around the hinge axis, and the armature 64 is in the open state. After tripping, the reset button 61 is pressed again, and the locking part 7 of the reset button 61 contacts the latching protrusion 9 through the guide surface 14. The locking part 7 re-establishes latching with the latching protrusion 9, and the circuit can be re-closed.

[0071] The specific work process of this plan is as follows:

[0072] This technical solution involves operating the test mechanism 4 during testing to cause the trip unit 3 to attract the armature 64, causing it to rotate around the hinge axis from the first position to the second position. During this process, the locking protrusion 9 disengages from the locking part 7, releasing the reset button 61. The elastic force of the elastic element 63 releases the reset button 61, causing it to slide upward toward the button opening 5. During the sliding process, the reset button 61 contacts and pushes the linkage rod 62 to move along the through hole 8. Since the other end of the linkage rod 62 is connected to the circuit breaker 2, the linkage rod 62 performs a tripping operation on the circuit breaker 2. The entire tripping process is smoother and more efficient, reducing the power requirements of the trip unit 3 and improving the efficiency and reliability of the tripping operation.

[0073] 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. A push-button tripping structure for a circuit breaker, comprising a housing (1), a short circuit breaker (2) spliced ​​to one side of the housing (1), a tripping device (3) disposed within the housing (1), and a testing mechanism (4), wherein the testing mechanism (4) forms a circuit so that the tripping device (3) attracts an armature (64) after being energized, and the side wall of the housing (1) has a push-button opening (5), characterized in that: It also includes a tripping structure, which is disposed within the housing (1) and linked with the testing mechanism (4), the tripping structure comprising: A reset button (61) is provided at the button port (5) and is slidably disposed relative to the housing (1). The reset button (61) has a snap-fit ​​part (7). Linkage rod (62), the housing (1) has a through hole (8), one end of the linkage rod (62) extends to one side of the sliding direction of the reset button (61), and the other end passes through the through hole (8) and is connected to the short circuit (2); The elastic element (63) has one end abutting against the lower part of the reset button (61) and the other end abutting against the inner wall of the corresponding housing (1). The elastic force of the elastic element (63) causes the reset button (61) to tend to move toward the linkage rod (62). An armature (64) is hinged within the housing (1). The armature (64) has a locking protrusion (9). The armature (64) switches between a first position and a second position around the hinge axis. When the armature (64) is in the first position, it is in an open state, and the locking protrusion (9) engages with the locking part (7). When the armature (64) is in the second position, it is in a closed state, and the locking protrusion (9) disengages from the locking part (7), so that the elastic element (63) drives the reset button (61) to push the linkage rod (62) to release the circuit breaker (2).

2. The push-button tripping structure of a circuit breaker according to claim 1, characterized in that: The housing (1) includes a housing base (101), an outer cover (102) disposed on the housing base (101), and a housing cover (103) disposed on the outer cover (102). The housing base (101) is provided with a fixing post (10). The armature (64) includes a suction section (641) for engaging with the release device (3), a retaining ring section (642), and a locking section (643) for engaging with the locking part (7). The locking section (643) is provided with the locking protrusion (9). The retaining ring section (642) is connected between the suction section (641) and the locking section (643). The retaining ring section (642) has an annular groove (12), and the fixing post (10) passes through the annular groove (12).

3. The push-button tripping structure of a circuit breaker according to claim 2, characterized in that: The reset button (61) includes a button part (611) and a push rod part (612) disposed on the side of the button part (611). The button part (611) has a relief cavity (13). The fixing post (10) is located in the relief cavity (13). The snap-fit ​​part (7) is disposed on the side wall of the relief cavity (13). The latching part (7) has a guide surface (14) on one side along the direction of movement of the reset button (61), and the push rod part (612) can push the linkage rod (62) to move.

4. The push-button tripping structure of a circuit breaker according to claim 3, characterized in that: The housing (101) is formed with abutment portion (15), and the elastic element (63) includes: The first elastic element (631) has a groove (16) on the side of the button part (611) near the abutting part (15). The bottom of the groove (16) has a protruding post (17). One end of the first elastic element (631) abuts against the bottom of the groove (16) and is sleeved on the outside of the protruding post (17), and the other end abuts against the abutting part (15). The second elastic element (632) has a groove (18) on the side of the push rod part (612) near the abutment part (15). One end of the second elastic element (632) abuts against the bottom of the groove (18) and the other end abuts against the abutment part (15).

5. The push-button tripping structure of a circuit breaker according to claim 3, characterized in that: The housing (101) is provided with a stop rod (19), which is located on one side of the housing (101) along the direction of the push rod (612) pushing the linkage rod (62), and is used to abut against the push rod (612).

6. The push-button tripping structure of a circuit breaker according to claim 2, characterized in that: It also includes a circuit board (20), which is installed inside the housing (1). The circuit board (20) is connected to a power line (21) and a current transformer line (22). The housing (1) also has a button port (23). The testing mechanism (4) includes: Test button (41), which is located at the button port two (23) and is slidably disposed relative to the housing (1); Test resistor (42), which is mounted on the circuit board (20); A button torsion spring (43) has its upper contact applied to the test button (41) to apply a preload, and its lower contact at the other end abuts against the test resistor (42). The test spring (44) is connected at one end to the circuit board (20). When the test button (41) is pressed, the test button (41) drives the button torsion spring (43) to make its upper contact contact with the test spring (44). The button torsion spring (43), the test spring (44) and the test resistor (42) work together to form a test circuit.

7. The push-button tripping structure of a circuit breaker according to claim 6, characterized in that: The housing (101) is provided with abutting post (24) and mounting post (25). A reset torsion spring (11) and the button torsion spring (43) are sleeved on the mounting post (25). One end of the reset torsion spring (11) abuts against the abutting post (24) and the other end acts on the engaging section (641). The elastic force of the reset torsion spring (11) makes the engaging section (641) tend to separate from the trip unit (3).

8. The push-button tripping structure of a circuit breaker according to claim 6, characterized in that: The test button (41) has a locking part (26), and there are several locking parts (26). A locking groove (27) is left between adjacent locking parts (26). The upper contact of the button torsion spring (43) is embedded in the locking groove (27). The housing (101) is provided with an orientation block (28), the orientation block (28) has an orientation groove (29), the test button (41) has an anti-detachment part (34), the anti-detachment part (34) protrudes from the opposite side walls of the test button (41) along the sliding direction, the anti-detachment part (34) is embedded in the orientation groove (29), and the groove direction of the orientation groove (29) is parallel to the sliding direction of the test button (41).

9. The push-button tripping structure of the circuit breaker according to claim 6, characterized in that: A wiring groove (30) is formed between the housing (101) and the outer cover (102) for the power line (21) and the transformer line (22) to pass through.

10. The push-button tripping structure of the circuit breaker according to claim 6, characterized in that: The outer cover (102) is provided with structural ribs (31), which are distributed on the side of the trip unit (3) away from the circuit board (20); the structural ribs (31) are provided with receiving parts (32), which have receiving holes (33).

Images