Electronic leakage protection circuit breaker

Abstract

The utility model provides an electronic leakage protection circuit breaker, which comprises a shell, a first shell cover, a second shell cover, a test device arranged in the shell, an operation device used for opening or closing the circuit breaker and a leakage tripping protection device used for leakage detection tripping, and is characterized in that the operation device comprises a handle and an operation mechanism linked with the handle; a first cavity matched with the first shell cover and a second cavity matched with the second shell cover are formed in the two sides of the shell respectively, and the electric leakage tripping protection device comprises an electric leakage tripping mechanism and a transmission mechanism. The electric leakage tripping mechanism comprises a circuit board, a base, a tripper, a tripping rod, a buckle plate, a spring seat, a positioning piece and a reset rod which are arranged in the second cavity; and the identification assembly comprises an indication block, an indication buckle, a first indication torsion spring and a second indication torsion spring. According to the utility model, a worker can rapidly identify the electric leakage tripping problem, and the operation mechanism is stable and reliable.

Description

Technical Field

[0001] This utility model relates to the field of circuit breaker technology, specifically to an electronic residual current circuit breaker. Background Technology

[0002] A residual current device (RCD), also known as a residual current circuit breaker, is primarily used to protect equipment from leakage current faults and to protect against potentially fatal electric shocks. It provides overload and short-circuit protection and can be used to protect circuits or motors from overload and short circuits. It can also be used for infrequent switching and starting of circuits under normal conditions. An electronic RCD mainly consists of a zero-sequence current transformer, an electronically controlled residual current trip unit, and a circuit breaker with overload and short-circuit protection. When leakage current occurs in the protected circuit or a person experiences an electric shock, as long as the leakage current reaches the designed operating current value, the secondary winding of the zero-sequence current transformer outputs a signal, which triggers the circuit breaker to trip, thus cutting off the power supply and providing leakage and electric shock protection.

[0003] The existing Chinese patent application number is CN202421479886.8, and the patent name is "An Electronic Residual Current Circuit Breaker". It discloses "An electronic residual current circuit breaker, including a housing (1), wherein the housing (1) includes a first housing (11) and a middle housing (12), wherein the first housing (11) and the middle housing (12) cooperate with each other to form a first accommodating cavity (13). The feature is that it further includes: a wiring terminal (2) for wiring; a first contact mechanism (3) disposed in the first accommodating cavity (13) and fitted to the middle housing (12); wherein the first contact mechanism (3) includes a moving contact piece (31) and a stationary contact piece (32); and a transmission mechanism (4) disposed in the first accommodating cavity (13). The plate (31) is mounted on the transmission mechanism (4) and driven by the transmission mechanism (4); the zero-sequence transformer (5) is located in the first accommodating cavity (13); the control circuit board (6) is connected to the zero-sequence transformer (5) and is used to receive the signal on the zero-sequence transformer (5); the trip unit (7) is located in the first accommodating cavity (13), is connected to the control circuit board (6) and is used to control the operation of the transmission mechanism (4) to separate the moving contact plate (31) from the stationary contact plate (32); the isolation component (8) is located between the control circuit board (6) and the first contact mechanism (3) and is used to separate the control circuit board (6) and the first contact mechanism (3). It cannot quickly identify whether the circuit breaker tripped due to leakage, which reduces the efficiency of maintenance by the staff. Utility Model Content

[0004] Based on the above problems, the purpose of this utility model is to provide an electronic residual current circuit breaker that is easy for staff to quickly identify leakage tripping problems and has a stable operating mechanism.

[0005] To address the above problems, the following technical solution is provided: An electronic residual current circuit breaker, comprising a housing, a first housing cover, a second housing cover, a testing device installed within the housing, an operating device for opening or closing the circuit breaker, and a residual current tripping protection device for detecting and tripping residual current. The operating device includes a handle and an operating mechanism linked to the handle. The housing has a first chamber that mates with the first housing cover and a second chamber that mates with the second housing cover on both sides. The residual current tripping protection device includes a residual current tripping mechanism and a transmission mechanism linked to the operating mechanism to control the closing or opening of the residual current tripping mechanism. The residual current tripping mechanism includes a circuit board, a base, a trip unit, a tripping rod, a trip plate, a spring seat, a positioning element, and a reset rod installed in the second chamber. The base has a first connecting post pivotally connected to the tripping rod, and a second connecting post pivotally connected to the reset rod below the first connecting post. The tripping rod has a first limiting groove, and a part of the reset rod is sleeved on the second connecting post, with one end located in the first limiting groove. The outer wall of the connecting post abuts against the first torsion spring at the other end, and the third connecting post is located on the base near the handle. A second torsion spring, with one end abutting the upper end of the release lever and the other end abutting the inner wall of the base, is sleeved on the third connecting post. The base has a boss, and the spring seat has a positioning groove that matches the boss. The base has a fourth and a fifth connecting post passing through the spring seat and located at its two ends. A connecting shaft passes through the base, and the buckle plate is pivotally connected to the connecting shaft. The buckle plate has an abutment end that limits the release lever; the spring seat has an installation groove, and a pressure relief spring is installed in the installation groove. One end of the pressure relief spring abuts against the inner wall of the installation groove, and the other end abuts against the buckle plate; the base has a sixth connecting post that pivotally engages with the positioning component below the spring seat; the buckle plate has a second limiting groove that engages with the end of the positioning component; the buckle plate has a transmission head that engages with and limits the transmission mechanism on the side facing the transmission mechanism; the release device and the release lever are arranged opposite to each other.It also includes a recognition component, which comprises an indicator block, an indicator buckle, a first indicator torsion spring, and a second indicator torsion spring. The indicator block is pivotally connected to a fourth connecting post, and the indicator buckle is pivotally connected to a fifth connecting post. The indicator buckle and the indicator block are located on the inner side of the spring seat facing the base. The top of the indicator block has an indicator area with two corresponding markings for closing and opening. The housing has an indicator opening corresponding to the indicator area. The first indicator torsion spring is sleeved on the fourth connecting post and located on the side of the spring seat facing the second housing cover. One end of the first indicator torsion spring abuts against the inside of the spring seat, and the other end abuts against the indicator block. The second indicator torsion spring is sleeved on the fifth connecting post. One end of the second indicator torsion spring abuts against the boss, and the other end abuts against the indicator buckle. The end of the indicator block facing the indicator buckle has a limiting foot that abuts against and limits the buckle. The indicator block has transmission feet spaced apart from the limiting foot, which cooperate with the transmission mechanism to realize the indication of the closing marking in the indicator area. The end of the indicator buckle near the second limiting groove has a protruding release foot.

[0006] In the above structure, when the circuit breaker is closed, the pressure relief spring is compressed and stores energy. The thrust generated by this spring allows the trip plate to firmly abut against the trip lever through the abutment end. The trip lever is limited by the elastic force of the second torsion spring. The trip lever and the trip unit cooperate to limit the reset lever, and the first torsion spring is in a stored energy state. When a leakage current occurs, the trip unit is activated, and its trip end instantly pushes the reset lever, causing the trip lever to swing relative to the first connecting post. This causes the trip plate to disengage from the trip lever, the abutment end to disengage from the trip lever, and the trip plate to swing relative to the connecting shaft. The indicator latch then connects to the trip lever via the trip foot. The plates cooperate to disengage the indicator buckle from the indicator block. The indicator block swings relative to the fourth connecting post under the torque of the first indicator torsion spring. The marking on the indicator block representing the tripped circuit breaker corresponds to the indicator port. Simultaneously, the pressure relief spring releases its stored energy, controlling the transmission mechanism to trip via the transmission head. The transmission mechanism drives the operating mechanism to trip, thus tripping the circuit breaker. The handle returns to the tripped position. The leakage current tripping mechanism provides leakage current protection. The operator can observe through the indicator port whether the tripping is due to leakage current, improving the efficiency of maintenance personnel in identifying problems with this invention. After the circuit breaker is tripped, the reset rod swings rapidly relative to the second connecting post under the torque released by the first torsion spring, thereby pushing the tripping end of the trip unit to reset, so that it can extend and trip again next time. The buckle plate pushes the positioning part to swing relative to the sixth connecting post via the transmission mechanism, and then pushes the buckle plate to reset via the second limit groove, so that it can lock and limit the tripping rod when closing next time. The first indicating torsion spring limits the position of the indicating block and drives it to swing relative to the fourth connecting post, thus indicating whether there is leakage. The second indicating torsion spring engages with the limiting foot to limit the indicating block, and after the indicating block disengages, the torsion spring's torque allows it to swing back to its original position, ensuring the indicating block engages with the limiting foot when the circuit is closed. The limiting foot facilitates the engagement of the indicating block with the limiting foot, and the transmission foot facilitates the engagement of the indicating block with the transmission mechanism. When the circuit is closed, the transmission mechanism controls the indicating block to swing relative to the fourth connecting post until it abuts against the limiting foot, with the closing indicator on the indicating area corresponding to the indicating port. The release foot facilitates the engagement of the limiting foot with the limiting plate, allowing the indicating block to disengage after swinging.

[0007] By cooperating with the trip plate, trip lever, spring seat, positioning component, and reset lever, the force on the transmission mechanism during closing and opening can be reduced, and the force can be evenly distributed among the components, making the stress more uniform. This improves the structural strength of the leakage current tripping mechanism and the transmission mechanism, reduces the manufacturing difficulty, and enhances the reliability and stability of the leakage current tripping mechanism. By setting up the transmission mechanism, the leakage current tripping protection device can be formed into a unit that can be closed and opened independently, thereby reducing the force on the operating mechanism during circuit breaker opening and closing. This reduces the locking force between the trip and latch in the operating and transmission mechanisms, making the locking points less prone to wear and ensuring uniform stress. This reduces the material requirements and manufacturing precision, thus lowering the production cost of this invention and improving the structural stability and service life of the invention. This invention allows for the closing of the operating mechanism and leakage current tripping protection device with a single handle, eliminating the need for secondary operations to close the leakage current tripping protection device, thus improving the ease of operation. The first connecting post facilitates the installation and swinging of the tripping rod, while the second connecting post facilitates the installation and swinging of the reset rod. It also facilitates the installation of the first torsion spring, which abuts against the first connecting post to store energy, thus improving the stability of the structure and the reliability of the tripping end reset. The third and fourth connecting posts facilitate the installation of the spring seat, thereby improving its stability and the reliability of the energy storage of the pressure relief spring. The mounting groove facilitates the installation of the pressure relief spring, thus improving its stability. The pressure relief spring stores energy when the circuit breaker is closed and allows the latch plate to abut against the tripping rod for a limiting fit. When the leakage current tripping mechanism is opened, the released elastic force pushes the latch plate to drive the transmission mechanism to trip, thus improving the reliability of the tripping mechanism. The first torsion spring cooperates with the reset rod to reset the tripping end of the tripping device; the second torsion spring limits and resets the tripping rod, further improving the reliability of the invention. By setting a transmission head, the leakage tripping mechanism and the transmission mechanism can be easily connected and coordinated, thereby improving the reliability of transmission between the various components of this utility model. The boss and the positioning groove can be matched to facilitate the positioning and installation of the spring seat, thereby improving the ease of assembly of this utility model.

[0008] The present invention is further configured such that a pivot shaft protrudes from the base toward the first cover side, a transmission handle sleeved on the pivot shaft is embedded in the second cavity of the housing, a third torsion spring is sleeved on the transmission handle for resetting after rotation, and a drive rod inserted into the transmission handle through an arc groove is connected to the handle.

[0009] In the above structure, by placing the transmission handle within the second chamber, its volume can be reduced, thereby making better use of the space within the second chamber and correspondingly reducing the overall size of the invention, resulting in a more compact structure and improved structural strength and reliability of the leakage current trip unit. The addition of a third torsion spring improves the feel of the handle's swing and facilitates the reset swing of the transmission handle during circuit breaking. The inclusion of a drive rod facilitates linkage between the handle and the transmission handle, thus achieving linkage between the operating mechanism and the transmission mechanism, enabling the circuit board to be de-energized during circuit breaking. The addition of a pivot shaft improves the stability of the transmission handle, thereby increasing its stress resistance and enhancing the overall stability of the invention.

[0010] The present invention is further configured such that the indicator buckle is provided with a stop block, and the spring seat is provided with a stop groove adapted to the stop block.

[0011] In the above structure, the stop block facilitates the limiting of the second torsion spring, thereby facilitating its installation. The stop groove allows it to cooperate with the stop block, improving the stability of the indicator buckle's swing.

[0012] The present invention is further configured such that a first limiting block is provided on the base below the release foot.

[0013] The above structure can limit the position of the indicator buckle, thereby improving the stability of the indicator buckle and ensuring the reliability of the indicator block's engagement.

[0014] The present invention is further configured such that a second limiting block is provided on the base on the side of the fourth connecting column facing the trip unit.

[0015] In the above structure, the indicator block can be limited by setting a second limiting block, thereby improving the reliability of this utility model.

[0016] The present invention is further configured such that the bottom end of the tripping rod protrudes toward the reset rod and is provided with a receiving block corresponding to the tripping end of the tripping device, and the bottom end of the reset rod is provided with a transmission block located between the receiving block and the tripping end.

[0017] In the above structure, the transmission block facilitates the engagement of the reset rod and the release rod, increasing the engagement area and thus improving the reliability of this invention.

[0018] The present invention is further configured such that an extension block is provided at the bottom end of the reset rod facing the tripping end.

[0019] The above structure facilitates the reset of the trip unit for subsequent tripping, thereby improving the reliability of this invention.

[0020] The present invention is further configured such that the end of the buckle plate facing the spring seat is provided with a positioning end, and the positioning end is provided with a positioning head that cooperates with the pressure relief spring.

[0021] The above structure improves the stability of the pressure relief spring installation, thereby enhancing the reliability of this invention.

[0022] The present invention is further configured such that the ends of the first connecting column, the second connecting column, the third connecting column, the fourth connecting column and the fifth connecting column are all provided with connecting heads, and the spring seat is covered with a cover plate adapted to and connected to the connecting heads, and an observation port is opened on the cover plate at a position corresponding to the pressure relief spring.

[0023] The above structure further improves the stability of the leakage current tripping mechanism and limits the movement of each component, thereby enhancing the structural strength of this invention. The observation port facilitates the installation of the pressure relief spring, improving the ease of assembly.

[0024] The present invention is further provided with a positioning bushing adapted to the connecting shaft on the inner side of the second shell cover.

[0025] In the above structure, by setting a positioning bushing, the stability of the connecting shaft can be improved, thereby improving the reliability of this utility model. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the structure of this utility model.

[0027] Figure 2 This is a schematic diagram of the structure of the present invention when the second shell cover is opened.

[0028] Figure 3 This is a schematic diagram of the internal structure of the housing of this utility model.

[0029] Figure 4 This is a schematic diagram of the structure of the operating device and the leakage current tripping protection device in this utility model. Figure 1 .

[0030] Figure 5 This is a schematic diagram of the structure of the operating device and the leakage current tripping protection device in this utility model. Figure 2 .

[0031] Figure 6 This is a schematic diagram of the structure of the operating device and the leakage current tripping protection device in this utility model. Figure 3 .

[0032] Figure 7 This is a schematic diagram of the structure of the operating device and the leakage current tripping protection device in this utility model. Figure 4 .

[0033] Figure 8 This is a structural diagram of the transmission mechanism in this utility model.

[0034] Figure 9 This is a schematic diagram of the structure of the leakage current tripping protection device in this utility model. Figure 1 .

[0035] Figure 10 This is a schematic diagram of the structure of the leakage current tripping protection device in this utility model. Figure 2 .

[0036] Figure 11 This is a schematic diagram of the base structure in this utility model.

[0037] Figure 12 This is a schematic diagram of the structure of the buckle plate in this utility model.

[0038] Figure 13 This is a schematic diagram of the spring seat in this utility model.

[0039] Figure 14 This is a schematic diagram of the shell structure in this utility model.

[0040] The labels in the diagram have the following meanings: 1-Housing; 2-First housing cover; 3-Second housing cover; 4-Testing device; 5-Operating device; 6-Leakage current tripping protection device; 51-Handle; 52-Operating mechanism; 11-First chamber; 12-Second chamber; 61-Leakage current tripping mechanism; 62-Transmission mechanism; 611-Circuit board; 612-Base; 613-Trip device; 614-Trip lever; 615-Panel; 616-Spring seat; 617-Positioning component; 618-Reset lever;

[0041] 6121-First connecting post; 6122-Second connecting post; 6141-First limiting groove; 01-First torsion spring; 6123-Third connecting post; 02-Second torsion spring; 6124-Boss; 6161-Positioning groove; 6125-Fourth connecting post; 6126-Fifth connecting post; 6127-Connecting shaft; 6151-Abutting end; 6162-Mounting groove; 7-Relief spring; 6128-Sixth connecting post; 6152-Second limiting groove; 6153-Transmission head;

[0042] 8-Identification component; 81-Indicator block; 82-Indicator buckle; 83-First indicating torsion spring; 84-Second indicating torsion spring; 811-Indicator area; 13-Indicator port; 821-Stop block; 812-Limiting foot; 813-Transmission foot; 822-Disengagement foot; 6129-Pivot shaft; 9-Transmission handle; 03-Third torsion spring; 511-Drive rod; 6163-Stop groove; 6120-First limiting block; 61200-Second limiting block; 6141-Receiving block; 6181-Transmission block; 6182-Extension block; 6154-Positioning end; 61541-Positioning head; 04-Connector; 05-Cover plate; 051-Observation port. Detailed Implementation

[0043] The specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate this utility model, but are not intended to limit its scope.

[0044] It should be noted that all directional indicators (such as up, down, left, right, front, back, back, etc.) in the embodiments of this utility model are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0045] like Figures 1 to 14An electronic residual current circuit breaker is shown, comprising a housing 1, a first cover 2, a second cover 3, a testing device 4 installed inside the housing 1, an operating device 5 for opening or closing the circuit breaker, and a residual current tripping protection device 6 for detecting and tripping residual current. The operating device 5 includes a handle 51 and an operating mechanism 52 linked to the handle 51. The housing 1 has a first chamber 11 that mates with the first cover 2 and a second chamber 12 that mates with the second cover 3 on both sides. The residual current tripping protection device 6 includes a residual current tripping mechanism 61 and a transmission mechanism 62 that controls the closing or opening of the residual current tripping mechanism 61 in conjunction with the operating mechanism 52. The residual current tripping mechanism 61 includes... The system includes a circuit board 611, a base 612, a trip unit 613, a trip rod 614, a latch plate 615, a spring seat 616, a positioning element 617, and a reset rod 618, all installed in the second chamber 12. The base 612 has a first connecting post 6121 pivotally connected to the trip rod 614. Below the first connecting post 6121, the base 612 has a second connecting post 6122 pivotally connected to the reset rod 618. The trip rod 614 has a first limiting groove 6141. A first torsion spring 61 is sleeved on the reset rod 618, with one end located within the first limiting groove 6141 and abutting against the outer wall of the second connecting post 6122, and the other end abutting against the end of the reset rod 618. The base 612 has a third connecting post 6123 near the handle 51. A second torsion spring 02, one end of which abuts against the upper end of the release lever 614 and the other end of which abuts against the inner wall of the base 612, is sleeved on the third connecting post 6123. The base 612 has a boss 6124, and the spring seat 616 has a positioning groove 6161 that matches the boss 6124. The base 612 has a fourth connecting post 6125 and a fifth connecting post 6126 that pass through the spring seat 616 and are located at its two ends. A connecting shaft 6127 passes through the base 612, and the buckle plate 615 is pivotally connected to the connecting shaft 6127. The buckle plate 615 has a release mechanism. The rod 614 has a limiting engagement end 6151. The spring seat 616 has an installation groove 6162. A pressure relief spring 7 is installed in the installation groove 6162. One end of the pressure relief spring 7 abuts against the inner wall of the installation groove 6162, and the other end abuts against the buckle plate 615. The base 612 has a sixth connecting post 6128 located below the spring seat 616, which is pivotally engaged with the positioning member 617. The buckle plate 615 has a second limiting groove 6152 that engages with the end of the positioning member 617. The buckle plate 615 has a transmission head 6153 that engages with and limits the transmission mechanism 62 on the side facing the transmission mechanism 62. The release device 613 is arranged opposite to the release rod 614.It also includes a discrimination component 8, which includes an indicator block 81, an indicator buckle 82, a first indicator torsion spring 83, and a second indicator torsion spring 84. The indicator block 81 is pivotally connected to the fourth connecting post 6125, and the indicator buckle 82 is pivotally connected to the fifth connecting post 6126. The indicator buckle 82 and the indicator block 81 are located on the inner side of the spring seat 616 facing the base 612. The top of the indicator block 81 is provided with an indicator area 811, which is provided with two markings corresponding to closing and opening. The housing 1 has an indicator opening 13 corresponding to the indicator area 811. The first indicator torsion spring 83 is sleeved on the fourth connecting post 6125 and is located on the inner side of the base 6126. The spring seat 616 faces the second housing cover 3, with one end abutting inside the spring seat 616 and the other end abutting the indicator block 81. The second indicator torsion spring 84 is sleeved on the fifth connecting post 6126, with one end abutting the boss 6124 and the other end abutting the indicator buckle 82. The end of the indicator block 81 facing the indicator buckle 82 is provided with a limiting foot 812 that abuts and limits its movement. The indicator block 81 is provided with a transmission foot 813 at intervals from the limiting foot 812, which cooperates with the transmission mechanism 62 to indicate the closed indicator in the indicator area 811. The end of the indicator buckle 82 near the second limiting groove 6152 has a protruding release foot 822.

[0046] In the above structure, when the circuit breaker is closed, the pressure relief spring 7 is compressed and stores energy. The thrust generated by this spring allows the trip plate 615 to firmly abut against the trip lever 614 via the abutment end 6151. The trip lever 614 is limited by the elastic force of the second torsion spring 02. The trip lever 614 cooperates with the trip unit 613 to limit the reset lever 618, and the first torsion spring 01 is in a stored energy state. When a leakage occurs, the trip unit 613 is activated, and its trip end instantly pushes the reset lever 618, causing the trip lever 614 to swing relative to the first connecting post 6121. This causes the trip plate 615 to disengage from the trip lever 614, the abutment end 6151 to disengage from the trip lever 614, and the trip plate 615 to swing relative to the connecting shaft 6127. The indicator buckle 82 engages with the buckle plate 615 via the tripping foot 822, causing the indicator buckle 82 to disengage from the indicator block 81. The indicator block 81 swings relative to the fourth connecting post 6125 by the torque of the first indicator torsion spring 83. The marking on the indicator block 81 representing the tripped circuit breaker corresponds to the indicator port 13. At the same time, the pressure relief spring 7 releases its stored energy, and the transmission mechanism 62 is controlled to trip via the transmission head 6153. After the transmission mechanism 62 drives the operating mechanism 52 to trip, the circuit breaker is tripped. The handle 51 returns to the tripped position. The leakage current tripping mechanism 61 plays a role in leakage current protection. The operator can observe through the indicator port 13 whether the tripping of this utility model is caused by leakage current, which improves the efficiency of maintenance personnel in identifying problems of this utility model. After the circuit breaker is fully tripped, the reset lever 618, powered by the torque released from the first torsion spring 01, swings rapidly relative to the second connecting post 6122, thereby pushing the tripping end of the trip unit 613 to reset, facilitating its next tripping action. The latch plate 615, via the transmission mechanism 62, pushes the positioning member 617 to swing relative to the sixth connecting post 6128, and then, via the second limiting groove 6152, pushes the latch plate 615 to reset, facilitating its locking and limiting with the trip lever 614 during the next closing action. The first indicating torsion spring 83 limits the position of the indicating block 81 and drives it to swing relative to the fourth connecting post 6125 via its torque, thus achieving the indication of whether there is leakage current. By setting a second indicating torsion spring 84, the indicating buckle 82 can cooperate with the limiting foot 812 to limit the indicating block 81. After the indicating block 81 is disengaged, the torque of the second indicating torsion spring 84 allows it to swing back to its original position, so that when the circuit is closed, the indicating block 81 and the indicating buckle 82 cooperate to limit the circuit. The limiting foot 812 facilitates the cooperation between the indicating block 81 and the indicating buckle 82. The transmission foot 813 facilitates the cooperation between the indicating block 81 and the transmission mechanism 62. When the circuit is closed, the transmission mechanism 62 controls the indicating block 81 to swing relative to the fourth connecting post 6125 until it abuts against the indicating buckle 82 and is limited in position. The closing mark on the indicating area 811 corresponds to the indicating port 13. The disengagement foot 822 facilitates the cooperation between the indicating buckle 82 and the buckle plate 615 to swing and disengage from the indicating block 81.

[0047] By cooperating with the latch plate 615, trip rod 614, spring seat 616, positioning component 617, and reset rod 618, the force on the transmission mechanism 62 during closing and opening can be reduced, and the force can be evenly distributed among the components, making the stress more uniform. This improves the structural strength of the leakage current tripping mechanism 61 and the transmission mechanism 62, reduces the manufacturing difficulty, and improves the reliability and stability of the leakage current tripping mechanism 61 in achieving leakage current tripping. By setting the transmission mechanism 62, the leakage current tripping protection device 6 can be formed into a unit that can be closed and opened independently, thereby reducing the force on the operating mechanism 52 during circuit breaker opening and closing. This reduces the locking force between the trip latch and the locking latch in the operating mechanism 52 and the transmission mechanism 62, making the locking point less prone to wear and the stress at the locking point uniform. This reduces the requirements for materials and manufacturing precision, thereby reducing the production cost of this utility model and improving the structural stability and service life of this utility model. This invention allows for the operation of the operating mechanism 52 and the leakage current trip protection device 6 to be closed using a single handle 51, eliminating the need for a secondary operation to close the leakage current trip protection device 6, thus improving the ease of operation. The first connecting post 6121 facilitates the installation and swinging of the tripping rod 614, while the second connecting post 6122 facilitates the installation and swinging of the reset rod 618. It also facilitates the installation of the first torsion spring 01, which abuts against the first connecting post 6121 to store energy, improving the structural stability and the reliability of the tripping end reset of the trip unit 613. The third and fourth connecting posts 6123 and 6125 facilitate the installation of the spring seat 616, thereby improving its stability and the reliability of the energy storage of the pressure relief spring 7. The mounting groove 6162 facilitates the installation of the pressure relief spring 7, thus improving its stability. By incorporating a pressure relief spring 7, energy can be stored when the circuit breaker is closed, and the latch plate 615 and tripping rod 614 can be engaged and limited. When the leakage current tripping mechanism 61 is opened, the released elastic force pushes the latch plate 615 to drive the transmission mechanism 62 to trip, thereby improving the reliability of the circuit breaker's opening. By incorporating a first torsion spring 01, the tripping end of the tripping device 613 can be reset in cooperation with the reset rod 618; by incorporating a second torsion spring 02, the tripping rod 614 can be limited and reset, thereby improving the reliability of the present invention. By incorporating a transmission head 6153, the leakage current tripping mechanism 61 and the transmission mechanism 62 can be easily engaged in transmission, thereby improving the reliability of transmission between the various components of the present invention. By incorporating a boss 6124 and a positioning groove 6161, the spring seat 616 can be easily positioned and installed, thereby improving the ease of assembly of the present invention.

[0048] In this embodiment, the base 612 protrudes towards the first cover 2 and is provided with a pivot shaft 6129. The second chamber 12 of the housing 1 is embedded with a transmission handle 9 sleeved on the pivot shaft 6129. A third torsion spring 03 is sleeved on the transmission handle 9 for resetting after rotation. A drive rod 511 is connected to the handle 51 and inserted into the transmission handle 9 through the arc groove.

[0049] In the above structure, by placing the transmission handle 9 within the second chamber 12, its volume can be reduced, thereby making better use of the space within the second chamber 12 and correspondingly reducing the overall size of the invention, resulting in a more compact structure and improved structural strength and reliability of the leakage current tripping unit. The third torsion spring 03 improves the feel of the handle 51's swing and facilitates the reset swing of the transmission handle 9 during circuit breaking. The drive rod 511 facilitates linkage between the handle 51 and the transmission handle 9, thereby achieving linkage between the operating mechanism 52 and the transmission mechanism 62, enabling the circuit board 611 to be de-energized during circuit breaking. The pivot shaft 6129 enhances the stability of the transmission handle 9, thereby increasing its stress resistance and improving the overall stability of the invention.

[0050] In this embodiment, the indicator buckle 82 is provided with a stop block 821, and the spring seat 616 is provided with a stop groove 6163 that is adapted to the stop block 821.

[0051] In the above structure, the stop block 821 facilitates the limiting of the second torsion spring 02, thereby facilitating the installation of the second torsion spring 02. The stop groove 6163 can cooperate with the stop block 821 to improve the stability of the swing of the indicator buckle 82.

[0052] In this embodiment, a first limiting block 6120 is provided on the base 612 below the release foot 822.

[0053] By adopting the above structure, the indicator buckle 82 can be limited, thereby improving the stability of the indicator buckle 82 and ensuring the reliability of the cooperation with the indicator block 81.

[0054] In this embodiment, a second limiting block 61200 is provided on the base 612 on the side of the fourth connecting post 6125 facing the trip unit 613.

[0055] In the above structure, the indicator block 81 can be limited by the second limiting block 61200, thereby improving the reliability of this utility model.

[0056] In this embodiment, the bottom end of the tripping rod 614 protrudes towards the reset rod 618 and is provided with a receiving block 6141 corresponding to the tripping end of the tripping device 613. The bottom end of the reset rod 618 is provided with a transmission block 6181 located between the receiving block 6141 and the tripping end.

[0057] In the above structure, by setting the transmission block 6181, the reset rod 618 and the release rod 614 can be easily matched, which increases the matching area and thus improves the reliability of this utility model.

[0058] In this embodiment, the bottom end of the reset rod 618 is provided with an extension block 6182 facing the tripping end.

[0059] The above structure facilitates the reset of the trip unit 613 for subsequent tripping, thereby improving the reliability of this invention.

[0060] In this embodiment, the end of the buckle plate 615 facing the spring seat 616 is provided with a positioning end 6154, and the positioning end 6154 is provided with a positioning head 61541 that cooperates with the pressure relief spring 7.

[0061] By adopting the above structure, the stability of the pressure relief spring 7 can be improved, thereby improving the reliability of this utility model.

[0062] In this embodiment, the ends of the first connecting post 6121, the second connecting post 6122, the third connecting post 6123, the fourth connecting post 6125 and the fifth connecting post 6126 are all provided with connecting heads 04. The spring seat 616 is covered with a cover plate 05 that is adapted to and connected to the connecting head 04. An observation port 051 is opened on the cover plate 05 at a position corresponding to the pressure relief spring 7.

[0063] The above structure further improves the stability of the leakage current tripping mechanism 61 and limits the movement of each component, thereby enhancing the structural strength of this invention. The observation port 051 facilitates the installation of the pressure relief spring 7, thus improving the ease of assembly of this invention.

[0064] In this embodiment, the inner side of the second cover 3 is provided with a positioning bushing that is adapted to the connecting shaft 6127.

[0065] In the above structure, by setting a positioning bushing, the stability of the connecting shaft 6127 can be improved, thereby improving the reliability of this utility model.

[0066] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present utility model. These improvements and modifications assumed above should also be considered within the protection scope of the present utility model.

Claims

1. An electronic residual current circuit breaker, comprising a housing, a first housing cover, a second housing cover, a testing device installed within the housing, an operating device for opening or closing the circuit breaker, and a residual current tripping protection device for detecting and tripping residual current. The operating device includes a handle and an operating mechanism linked to the handle. The housing has a first chamber cooperating with the first housing cover and a second chamber cooperating with the second housing cover on both sides. The residual current tripping protection device includes a residual current tripping mechanism and a transmission mechanism linked to the operating mechanism to control the closing or opening of the residual current tripping mechanism. The device is characterized in that: The leakage current tripping mechanism includes a circuit board, a base, a trip unit, a tripping rod, a tripping plate, a spring seat, a positioning component, and a reset rod installed in the second chamber. The base has a first connecting post pivotally connected to the tripping rod. Below the first connecting post, the base has a second connecting post pivotally connected to the reset rod. The tripping rod has a first limiting groove. A first torsion spring is sleeved on the reset rod, with one end located within the first limiting groove and abutting against the outer wall of the second connecting post, and the other end abutting against the end of the reset rod. A third connecting post is located on the base near the handle, with one end sleeved on the third connecting post abutting against the tripping rod. The upper end of the rod abuts against a second torsion spring on the inner wall of the base. The base has a boss, and the spring seat has a positioning groove that matches the boss. The base has a fourth connecting post and a fifth connecting post passing through the spring seat and located at both ends thereon. A connecting shaft passes through the base, and the buckle plate is pivotally connected to the connecting shaft. The buckle plate has an abutting end that limits the release rod. The spring seat has an installation groove, and a pressure relief spring is installed in the installation groove. One end of the pressure relief spring abuts against the inner wall of the installation groove, and the other end abuts against the buckle plate. Below the spring seat, the base has a pivot point that connects to the positioning element. The sixth connecting post is connected to the buckle plate, which has a second limiting groove that mates with the end of the positioning component. The buckle plate has a transmission head on the side facing the transmission mechanism that mates with and limits the transmission mechanism. The trip unit and the trip rod are arranged opposite each other. It also includes a discrimination component, which includes an indicator block, an indicator buckle, a first indicator torsion spring, and a second indicator torsion spring. The indicator block is pivotally connected to the fourth connecting post, and the indicator buckle is pivotally connected to the fifth connecting post. The indicator buckle and the indicator block are located on the inner side of the spring seat facing the base. The top of the indicator block has an indicator area, which has two corresponding markings for closing and opening. The housing... The body has an indicator opening corresponding to the indicator area. The first indicator torsion spring is sleeved on the fourth connecting post and is located on the side of the spring seat facing the second shell cover. One end of the spring spring abuts against the inside of the spring seat, and the other end abuts against the indicator block. The second indicator torsion spring is sleeved on the fifth connecting post. One end of the spring spring abuts against the boss, and the other end abuts against the indicator buckle. The end of the indicator block facing the indicator buckle is provided with a limiting foot that abuts against and limits the limit foot. The indicator block is provided with a transmission foot that cooperates with the transmission mechanism to realize the indicator area indicating the closing mark at a distance from the limiting foot. The end of the indicator buckle near the second limiting groove is provided with a release foot.

2. The electronic residual current circuit breaker according to claim 1, characterized in that: The base has a pivot shaft protruding from the side facing the first shell cover. The second cavity of the shell is fitted with a transmission handle sleeved on the pivot shaft. A third torsion spring is sleeved on the transmission handle to reset it after rotation. A drive rod is connected to the handle, passing through an arc groove and inserted into the transmission handle.

3. The electronic residual current circuit breaker according to claim 1, characterized in that: The indicator buckle is provided with a stop block, and the spring seat is provided with a stop groove that matches the stop block.

4. An electronic residual current circuit breaker according to claim 3, characterized in that: The base is provided with a first limiting block located below the release foot.

5. An electronic residual current circuit breaker according to claim 4, characterized in that: A second limiting block is provided on the base on the side of the fourth connecting column facing the trip unit.

6. An electronic residual current circuit breaker according to claim 1, characterized in that: The bottom end of the tripping rod protrudes towards the reset rod and is provided with a receiving block corresponding to the tripping end of the tripping device. The bottom end of the reset rod is provided with a transmission block located between the receiving block and the tripping end.

7. An electronic residual current circuit breaker according to claim 6, characterized in that: An extension block is provided at the bottom end of the reset rod facing the tripping end.

8. An electronic residual current circuit breaker according to claim 1, characterized in that: The buckle plate has a positioning end facing the spring seat, and the positioning end has a positioning head that cooperates with the pressure relief spring.

9. An electronic residual current circuit breaker according to claim 1, characterized in that: The first, second, third, fourth, and fifth connecting columns are all provided with connectors at their ends. The spring seat is covered with a cover plate that is adapted to connect with the connectors. An observation port is provided on the cover plate at a position corresponding to the pressure relief spring.

10. An electronic residual current circuit breaker according to claim 9, characterized in that: The inner side of the second cover is provided with a positioning bushing that is adapted to the connecting shaft.

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