Electromagnetic leakage protection circuit breaker

Abstract

The invention provides an electromagnetic leakage protection circuit breaker which comprises a shell, a shell cover, a short-circuit protection unit installed on the shell, a test device, a contact assembly and an operation device used for opening or closing the circuit breaker, and further comprises a leakage protection unit. The electric leakage protection unit comprises an electric leakage tripping mechanism and a transmission assembly which is in transmission fit with the operating mechanism, the electric leakage tripping mechanism comprises a base, an electromagnetic tripper, a tripping rod, a buckle plate, a spring seat, a positioning piece and a reset piece which are installed in the second cavity, and the base is provided with a first connecting column which is in pivot fit with the tripping rod; the base is provided with a second connecting column which is pivoted and matched with the reset piece and located below the first connecting column, the tripping rod is provided with a first limiting groove, the reset piece is sleeved with a first torsional spring, one end of the first torsional spring is located in the first limiting groove and abuts against the inner wall of the first limiting groove, and the other end of the first torsional spring abuts against the end of the reset piece. According to the electric leakage tripping mechanism, all parts are uniformly stressed, and tripping is stable.

Description

Technical Field

[0001] The present invention relates to the technical field of circuit breakers, and particularly to an electromagnetic leakage protection circuit breaker. Background Art

[0002] Leakage protection circuit breakers have functions of overload protection, short-circuit protection and leakage protection, that is, they have the functions of both circuit breakers and leakage protectors. Therefore, leakage protection circuit breakers are commonly used protection devices in electrical circuits and are widely used in mobile electrical equipment and hand-held power tools; electrical equipment installed in harsh places such as humid and strongly corrosive environments; electrical construction machinery and equipment at construction sites; socket circuits in buildings such as schools, enterprises and residences; underwater lighting equipment in swimming pools, fountains and bathtubs; power supply lines and equipment installed in water; electrical medical equipment in hospitals that directly contacts the human body, etc. There are various situations for a leakage circuit breaker to trip, such as caused by overload, short circuit or leakage. Therefore, even when the leakage circuit breaker is in the tripped state, users cannot clearly determine whether it trips due to leakage. Thus, it brings certain difficulties to subsequent maintenance and operation and has some impacts on use.

[0003] To solve the above problems, existing leakage protection circuit breakers have a leakage indication function. Their closing of the circuit breaker and the leakage tripping part is achieved through a set of operating mechanisms, resulting in too much force on the tripping latch and locking latch at the operating mechanism. The locking part is prone to wear and uneven stress, leading to high material requirements and great processing difficulty. It is easy to fail during use, and further results in low product stability. There is a Chinese patent with the patent number CN201420392245.9 and the patent name "A leakage circuit breaker", which discloses "A leakage circuit breaker, including a housing (1), an operating mechanism, a contact mechanism, and a leakage tripping device (2). The operating mechanism cooperates with the contact mechanism. The operating mechanism includes a tripping latch and a locking latch (3). It is characterized in that: it further includes a leakage indication mechanism. The leakage indication mechanism includes a rotating arm (4), a lever (5), and an indicating button (6). The indicating button (6) is slidably mounted up and down in the housing (1). The indicating button (6) includes a first position extending out of the housing (1) and a second position buried in the housing (1). The rotating arm (4) is hinged below the indicating button (6) and includes a force-receiving end (41) and a pushing end (42). The pushing end (42) contacts the lower end of the indicating button (6). A first elastic member (7) is connected to the rotating arm (4). The lever (5) is hinged in the housing (1) and includes a pressing end (51) and a clamping end (52). One side of the pressing end (51) corresponds to the leakage tripping device (2), and the other side is in pressing cooperation with the force-receiving end (41). The clamping end (52) is in clamping cooperation with the indicating button (6). A second elastic member (8) is connected to the lever (5). The leakage tripping device (2) pushes the pressing end (51) to rotate and press the force-receiving end (41) to rotate, driving the clamping end (52) to rotate and disengage from the indicating button (6). The rotation of the force-receiving end (41) drives the pushing end (42) to push the indicating button (6) upward to pop out to form the first position. Pressing the indicating button (6) slides downward to be in clamping with the clamping end (52) and presses the pushing end (42) to drive the force-receiving end (41) to rotate and correspond to the pressing end (51) to form the second position, and the rotating arm (4) cooperates with the locking latch (3).". When the circuit breaker is closed, it is still necessary to press the indicating button (6) to make the leakage tripping device close, which is troublesome and inconvenient to operate. Summary of the Invention

[0004] Based on the above problems, the purpose of the present invention is to provide an electromagnetic leakage protection circuit breaker with a stable operating mechanism, convenient closing, uniform force on each component in the leakage tripping mechanism, and stable tripping.

[0005] In view of the above problems, the following technical solutions are provided: An electromagnetic leakage protection circuit breaker includes a housing, a housing cover, a short-circuit protection unit, an arc extinguishing device, a test device, a contact assembly, and an operating device for opening or closing the circuit breaker. The operating device includes a handle and an operating mechanism linked to the handle. The contact assembly includes a moving contact and a static contact. The moving contact is connected to the operating mechanism, and the static contact is installed in the housing and disposed opposite to the moving contact. It is characterized in that: First chambers and second chambers are respectively opened on both sides of the housing, and there are two sets of housing covers, namely a first cover adapted to the first chamber and a second cover adapted to the second chamber; A leakage protection unit is further included. The leakage protection unit includes a leakage tripping mechanism and a transmission assembly that is in transmission cooperation with the operating mechanism to control the closing or tripping of the leakage tripping mechanism. The leakage tripping mechanism includes a base installed in the second chamber, an electromagnetic release, a release lever, a retaining plate, a spring seat, a positioning member, and a reset member. The base is provided with a first connecting column pivotally connected to the release lever, and a second connecting column pivotally connected to the reset member is provided below the first connecting column on the base. A first limiting groove is opened on the release lever, and a first torsion spring is sleeved on the reset member, with one end located in the first limiting groove and abutting against the outer wall of the second connecting column, and the other end abutting against the end of the reset member. A third connecting column is provided at one end of the base close to the handle. A second torsion spring is sleeved on the third connecting column, with one end abutting against the upper end of the release lever and the other end abutting against the inner wall of the base. A boss is provided on the base, and a positioning groove adapted to the boss is opened on the spring seat. Fourth and fifth connecting columns are provided on the base and pass through the spring seat and are located at both ends thereof respectively. A connecting shaft penetrates through the base, and the retaining plate is pivotally connected to the connecting shaft. The retaining plate is provided with an abutting end that is in limiting cooperation with the release lever. An installation groove is opened on the spring seat, 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 retaining plate. A sixth connecting column pivotally connected to the positioning member is provided below the spring seat on the base. A second limiting groove adapted to the end of the positioning member is opened on the retaining plate. A transmission head that is in cooperation and limiting with the transmission assembly is provided on one side of the retaining plate facing the transmission assembly. A transmission foot that is in transmission cooperation with the transmission assembly is provided on the reset member; The transmission assembly includes a transmission handle coaxially arranged with the handle and pivotally connected to the inside of the housing, a connecting rod connected to the transmission handle, a jump buckle connected to the other end of the connecting rod, a rotating frame pivotally connected to a connecting shaft, and a locking buckle pivotally connected to the rotating frame and cooperating with the jump buckle for limiting. A third torsion spring for resetting the transmission handle after rotation is sleeved on the transmission handle. A travel groove cooperating with the transmission head is formed on one side of the locking buckle facing the transmission head. A convex column is provided on the rotating frame, and a fourth torsion spring for limiting the locking buckle is sleeved on the convex column. A hanging hole is formed on the rotating frame. A fixed shaft is inserted into the second chamber of the housing, and a tension spring is connected to the fixed shaft. The other end of the tension spring is hooked into the hanging hole. The tension spring is in the opening direction of the moving contact. A communication groove is formed on the base. A limiting block passing through the communication groove to one side of the buckle plate is provided on the rotating frame. A driving groove cooperating with the transmission foot is formed on the limiting block. Both ends of the positioning member are respectively in limiting cooperation with the rotating frame and the buckle plate. An arc-shaped groove coaxially arranged with the transmission handle and communicating the first chamber and the second chamber is formed in the housing. A driving rod for driving the transmission handle to rotate through the arc-shaped groove is connected to the handle. A pushing port which is open towards the opening direction and cooperates with the driving rod is formed on the outer circumferential wall of the transmission handle.

[0006] In the above structure, when the circuit breaker is in the closed state, the pressure relief spring is in a compressed state for energy storage. The thrust generated by it can make the catch firmly abut against the tripping lever through the abutting end. The tripping lever is limited by the elastic force of the second torsion spring. The locking catch and the tripping catch cooperate to limit the rotating frame. The rotating frame cooperates with the transmission foot through the driving groove to limit the reset member, and the first torsion spring is in the energy storage state. When a leakage occurs, the electromagnetic release is activated, and its tripping end instantaneously pushes the tripping lever to swing relative to the first connecting column, causing the catch to swing relative to the connecting shaft, and the abutting end to disengage from the tripping lever to achieve tripping. The tripping of the catch causes the pressure relief spring to release the stored energy. Through the cooperation of the transmission head and the stroke groove, the locking catch and the tripping catch are disengaged, and the tension spring pulls the rotating frame to move in the opening direction. While moving, the rotating frame pushes the locking catch to push the operating mechanism to trip and then achieve the opening of the circuit breaker. The leakage tripping mechanism plays a role in leakage protection. When the circuit breaker is opened, the driving groove of the rotating frame disengages from the transmission foot of the reset member, enabling the reset member to swing rapidly relative to the second connecting column through the torsion force released after the first torsion spring stores energy, thereby pushing the tripping end of the electromagnetic release to reset for the next extension and tripping. The catch pushes the positioning member to swing relative to the sixth connecting column through the bottom end of the rotating frame, and pushes the catch to reset through the second limiting groove for cooperation and locking limitation with the tripping lever during the next closing. The operating mechanism includes a bracket for installing the moving contact, a linkage catch installed on the bracket, a linkage rod connecting the handle and the linkage catch, and a locking block that cooperates with the linkage catch for locking or tripping. Through the mutual cooperation of the catch, the tripping lever, the spring seat, the positioning member, and the reset member, the acting force received by the transmission component during closing and opening can be reduced, and the acting force can be evenly distributed to each component, making the force more uniform, thereby improving the structural strength of the leakage tripping mechanism and the transmission component, reducing the processing difficulty of production, and improving the reliability and stability of the leakage tripping mechanism to achieve leakage tripping. By setting the transmission component, the leakage protection unit can be formed into a unit that can be separately closed and opened, thereby reducing the acting force received by the operating mechanism during the opening and closing of the circuit breaker, and thus reducing the locking force between the tripping catch and the locking catch and between the linkage catch and the locking block, improving the structural stability and operating life of the present invention. The present invention can drive the closing of the operating mechanism and the leakage protection unit through a single handle without the need for secondary operation to close the leakage protection unit, improving the convenience of operation of the present invention. Moreover, when the present invention is closed by the handle, the forces received by the operating mechanism and the leakage protection unit can be distributed to the handle through the drive rod, the linkage rod, the connecting rod, and the transmission handle 1, thereby reducing the acting force received when the linkage catch and the locking block of the operating mechanism are engaged, making the engaged part not easily worn, the force at the engaged part being evenly distributed, reducing the material requirements and production precision of the linkage catch and the locking block, and thus reducing the production cost of the present invention.The first connecting column can be provided to facilitate the installation and swinging of the tripping rod, the second connecting column can be provided to facilitate the installation and swinging of the reset member, and the first torsion spring can be provided to facilitate the abutment and cooperation with the first connecting column to store energy, thereby improving the stability of the structure of the present invention and the reliability of the reset of the tripping end of the tripper. The third connecting column and the fourth connecting column can facilitate the installation of the spring seat, thereby improving the stability of the spring seat and the reliability of the energy storage of the pressure release spring. The installation groove can facilitate the installation of the pressure release spring, thereby improving the stability of the pressure release spring. The pressure release spring can be provided to store energy when the circuit breaker is closed, and the buckle plate can be abutted and limited with the tripping rod. When the leakage tripping mechanism is opened, the elastic force released by the buckle plate drives the tripping buckle to be released from the lock, thereby improving the reliability of the opening of the present invention. The first torsion spring can be provided to cooperate with the reset member to reset the tripping end of the tripper; the second torsion spring can limit and reset the tripping rod, thereby improving the reliability of the present invention. By providing a transmission head and a transmission foot, the leakage current release mechanism and the transmission assembly can be easily matched, thereby improving the reliability of transmission between the various parts of the present invention. By matching the boss with the positioning groove, the positioning and installation of the spring seat can be facilitated, thereby improving the convenience of assembly of the present invention. By providing a travel groove and a drive groove, it can be convenient for them to match with the transmission head and the transmission foot respectively, and by providing a connecting groove, the structure of the present invention can be made more compact, thereby improving the structural strength of the leakage current release mechanism and improving the reliability of the present invention. By arranging the transmission handle in the second chamber, its volume can be reduced, and then the space in the second chamber can be reasonably utilized, which can reduce the volume of the present invention accordingly, making the structure more compact and improving the structural strength and reliability of the leakage current release unit.

[0007] The present invention is further configured such that a positioning shaft pivotally connected to the transmission handle is provided on the base.

[0008] In the above structure, the stability of the transmission handle can be improved by providing the positioning shaft, thereby improving its force strength and improving the stability of the present invention.

[0009] The present invention is further configured such that a guide block is provided on a protrusion on one side of the lock buckle facing the operating mechanism, and the guide block is provided with an opening toward the opening direction of the moving contact.

[0010] With the above structure, when the operating mechanism closes, through the cooperation of the driving rod and the pushing port, the transmission handle is pushed to rotate to achieve closing. When the circuit breaker trips and opens due to reasons other than leakage, the reset of the operating mechanism will not drive the reset of the leakage tripping mechanism, which can facilitate the inspection personnel to distinguish that the opening of the circuit breaker is not caused by leakage and is convenient for the inspection personnel to diagnose. When the leakage protection unit detects leakage and trips, the guiding block can cooperate with the transmission rod in the operating mechanism to disengage the linkage buckle of the operating mechanism from the locking block, thereby enabling the present invention to trip and opening, improving the reliability of the present invention.

[0011] The present invention is further configured such that an indicating area is provided at the top end of the rotating frame, an indicating opening corresponding to the indicating area is provided on the housing, and two marks corresponding to closing and opening are provided in the indicating area.

[0012] With the above structure, it can facilitate the inspection personnel to distinguish the current closing or opening state of the leakage tripping mechanism, and can facilitate the maintenance personnel to observe whether the circuit breaker trips due to leakage, thereby improving the convenience of use and maintenance of the present invention.

[0013] The present invention is further configured such that the bottom end of the rotating frame is a limiting end that cooperates with the positioning member, a power connection head electrically connected to the wiring terminal of the circuit breaker is installed on the limiting end, and a fifth torsion spring for limiting the power connection head is provided on the limiting end.

[0014] With the above structure, it can facilitate the circuit breaker to connect one end of the power supply when closing, so as to supply power to the test circuit, thereby improving the reliability of the present invention.

[0015] The present invention is further configured such that a receiving block corresponding to the tripping end protrudes from the bottom end of the tripping rod towards the reset member.

[0016] With the above structure, it can increase the pushing area of the tripping end of the release to push the tripping rod, thereby improving the reliability of tripping of the present invention.

[0017] The present invention is further configured such that a positioning end is provided at one end of the clamping plate facing the spring seat, and a positioning head cooperating with the pressure release spring is provided on the positioning end.

[0018] With the above structure, it can improve the installation stability of the pressure release spring, thereby improving the reliability of the present invention.

[0019] The present invention is further configured such that a notch is provided on the rotating frame, and one end of the connecting rod connected to the tripping buckle passes through the tripping buckle and into the notch.

[0020] With the above structure, it can limit the connecting rod, and further improve the connection strength between the connecting rod and the tripping buckle, improving the reliability of the present invention.

[0021] The present invention is further configured such that connection heads are provided at the ends of the first connection post, the second connection post, the third connection post, the fourth connection post, and the fifth connection post, a cover plate adapted to be connected to the connection heads is provided on the spring seat, and an observation port is formed at a position on the cover plate corresponding to the pressure relief spring.

[0022] Adopting the above structure can further improve the structural stability of the leakage tripping mechanism and limit each component, thereby improving the structural strength of the present invention. By providing the observation port, it is convenient for installers to install the pressure relief spring, thus improving the assembly convenience of the present invention.

[0023] The present invention is further configured such that a positioning bushing adapted to the connection shaft is provided inside the second cover.

[0024] In the above structure, by providing the positioning bushing, the stability of the connection shaft can be improved, thereby improving the reliability of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 Structural schematic of the present invention with the second cover opened Figure 1 。

[0026] Figure 2 Structural schematic of the present invention with the second cover opened Figure 2 。

[0027] Figure 3 Structural schematic of the interior of the housing of the present invention Figure 1 。

[0028] Figure 4 Structural schematic of the leakage tripping mechanism in the present invention Figure 1 。

[0029] Figure 5 Structural schematic of the leakage tripping mechanism in the present invention Figure 2 。

[0030] Figure 6 Structural schematic of the leakage tripping mechanism in the present invention Figure 3 。

[0031] Figure 7 Structural schematic diagram of a partial structure of the leakage tripping mechanism in the present invention.

[0032] Figure 8 Structural schematic diagram of a partial structure of the transmission assembly in the present invention.

[0033] Figure 9 Structural schematic of the transmission assembly and the operating handle in the present invention.

[0034] Figure 10This is a schematic diagram of the split structure of the leakage tripping mechanism in the present invention.

[0035] Figure 11 This is a schematic diagram of the structure of the base in the present invention Figure 1 。

[0036] Figure 12 This is a schematic diagram of the structure of the spring seat in the present invention.

[0037] Figure 13 This is a schematic diagram of the structure of the rotating frame in the present invention Figure 1 。

[0038] Figure 14 This is a schematic diagram of the structure of the rotating frame in the present invention Figure 2 。

[0039] Figure 15 This is a schematic diagram of the structure of the buckle plate in the present invention.

[0040] Figure 16 This is a schematic diagram of the structure of the base in the present invention Figure 2 。

[0041] Figure 17 This is a schematic diagram of the structure of the second cover in the present invention.

[0042] Figure 18 This is a schematic diagram of the structure of the housing in the present invention.

[0043] Figure 19 This is a schematic diagram of the structure inside the housing of the present invention Figure 2 。

[0044] Figure 20 This is a schematic diagram of the structure of the operating mechanism in the present invention.

[0045] The meanings of the reference numerals in the figure: 1 - housing; 2 - operating device; 21 - handle; 22 - operating mechanism; 11 - first chamber; 12 - second chamber; 13 - first cover; 14 - second cover; 3 - leakage tripping mechanism; 4 - transmission assembly; 31 - base; 32 - electromagnetic release; 33 - release lever; 34 - buckle plate; 35 - spring seat; 36 - positioning member; 37 - reset member; 311 - first connecting column; 312 - second connecting column; 331 - first limiting groove; 01 - first torsion spring; 313 - third connecting column; 02 - second torsion spring; 314 - boss; 351 - positioning groove; 315 - fourth connecting column; 316 - fifth connecting column; 03 - connecting shaft; 341 - abutting end; 352 - mounting groove; 04 - pressure relief spring; 317 - sixth connecting column; 342 - second limiting groove; 343 - transmission head; 371 - transmission foot; 41-transmission handle; 42-connecting rod; 43-jump buckle; 44-rotating frame; 45-lock buckle; 46-third torsion spring; 451-travel slot; 441-convex column; 05-fourth torsion spring; 442-hanging hole; 06-fixed shaft; 07-tension spring; 318-connecting slot; 443-limiting block; 4431-driving slot; 452-guide block; 411-pushing port; 444-indicating area; 15-indicating port; 445-limiting end; 5-electrical connector; 08-fifth torsion spring; 211-driving rod; 310-positioning shaft; 332- receiving block; 344- positioning end; 345- positioning head; 446- notch; 319- connecting head; 141- positioning sleeve; 221- bracket; 222- linkage buckle; 223- linkage rod; 224- locking block; 225- transmission rod. DETAILED DESCRIPTION

[0046] The specific implementation of the present invention is further described in detail below in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0047] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back, back...) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0048] like Figures 1 to 20An electromagnetic leakage protection circuit breaker shown in the figure includes a housing 1, a housing cover, a short-circuit protection unit installed on the housing 1, an arc extinguishing device, a test device, a contact assembly, and an operating device 2 for opening or closing the circuit breaker. The operating device 2 includes a handle 21 and an operating mechanism 22 linked with the handle 21. The contact assembly includes a moving contact and a static contact. The moving contact is connected to the operating mechanism 22, and the static contact is installed inside the housing 1 and is arranged opposite to the moving contact. It is characterized in that: first chambers 11 and second chambers 12 are respectively opened on both sides of the housing 1, and there are two groups of housing covers, namely a first cover 13 adapted to the first chamber 11 and a second cover 14 adapted to the second chamber 12; it also includes a leakage protection unit. The leakage protection unit includes a leakage tripping mechanism 3 and a transmission assembly 4 that is in transmission cooperation with the operating mechanism 22 to control the closing or opening of the leakage tripping mechanism 3. The leakage tripping mechanism 3 includes a base 31 installed in the second chamber 12, an electromagnetic release 32, a tripping rod 33, a clamping plate 34, a spring seat 35, a positioning member 36, and a reset member 37. A first connecting column 311 pivotally connected to the tripping rod 33 is provided on the base 31. A second connecting column 312 pivotally connected to the reset member 37 is provided below the first connecting column 311 on the base 31. A first limiting groove 331 is opened on the tripping rod 33. A first torsion spring 01 is sleeved on the reset member 37, with one end located in the first limiting groove 331 and abutting against the outer wall of the second connecting column 312, and the other end abutting against the end of the reset member 37. A third connecting column 313 is provided at one end of the base 31 close to the handle 21. A second torsion spring 02 is sleeved on the third connecting column 313, with one end abutting against the upper end of the tripping rod 33 and the other end abutting against the inner wall of the base 31. A boss 314 is provided on the base 31. A positioning groove 351 adapted to the boss 314 is opened on the spring seat 35. Fourth connecting columns 315 and fifth connecting columns 316 are provided on the base 31 and penetrate through the spring seat 35 and are respectively located at both ends thereof. A connecting shaft 03 penetrates through the base 31. The clamping plate 34 is pivotally connected to the connecting shaft 03. An abutting end 341 that is in limiting cooperation with the tripping rod 33 is provided on the clamping plate 34. An installation groove 352 is opened on the spring seat 35. A pressure relief spring 04 is installed in the installation groove 352. One end of the pressure relief spring 04 abuts against the inner wall of the installation groove 352, and the other end abuts against the clamping plate 34. A sixth connecting column 317 pivotally connected to the positioning member 36 is provided below the spring seat 35 on the base 31. A second limiting groove 342 adapted to the end of the positioning member 36 is opened on the clamping plate 34. A transmission head 343 that is in cooperation and limiting with the transmission assembly 4 is provided on one side of the clamping plate 34 facing the transmission assembly 4. A transmission foot 371 that is in transmission cooperation with the transmission assembly 4 is provided on the reset member 37; The transmission assembly 4 includes a transmission handle 41 coaxially arranged with the handle 21 and pivotally connected to the inside of the housing 1, a connecting rod 42 connected to the transmission handle 41, a jumping buckle 43 connected to the other end of the connecting rod 42, a rotating frame 44 pivotally connected to the connecting shaft 03, and a locking buckle 45 pivotally connected to the rotating frame 44 and cooperating with the jumping buckle 43 for limiting. A third torsion spring 46 for resetting the transmission handle 41 after rotation is sleeved on the transmission handle 41. A travel groove 451 cooperating with the transmission head 343 is formed on one side of the locking buckle 45 facing the transmission head 343. A convex column 441 is provided on the rotating frame 44, and a fourth torsion spring 05 for limiting the locking buckle 45 is sleeved on the convex column 441. A hanging hole 442 is formed on the rotating frame 44. A fixed shaft 06 is inserted into the housing 1 in the second chamber 12. A tension spring 07 is connected to the fixed shaft 06, and the other end of the tension spring 07 is hooked into the hanging hole 442. The tension spring 07 is located in the opening direction of the moving contact. A communication groove 318 is formed on the base 31. A limiting block 443 passing through the communication groove 318 to the side of the buckle plate 34 is provided on the rotating frame 44. A driving groove 4431 cooperating with the transmission foot 371 is formed on the limiting block 443. The two ends of the positioning member 36 are respectively in limiting cooperation with the rotating frame 44 and the buckle plate 34. An arc-shaped groove coaxially arranged with the transmission handle 41 and communicating the first chamber 11 and the second chamber 12 is formed in the housing 1. A driving rod 211 for driving the transmission handle 41 to rotate through the arc-shaped groove is connected to the handle 21. A pushing port 411 which is open towards the opening direction and cooperates with the driving rod 211 is formed on the outer circumferential wall of the transmission handle 41.

[0049] In the above structure, when the circuit breaker is in the closed state, the pressure relief spring 04 is in a compressed state for energy storage. The thrust generated by it can make the catch plate 34 firmly abut against the tripping lever 33 through the abutting end 341. The tripping lever 33 is limited by the elastic force of the second torsion spring 02. The locking latch 45 and the tripping latch 43 cooperate to limit the rotating frame 44. The rotating frame 44 cooperates with the transmission foot 371 through the driving groove 4431 to limit the reset member 37. The first torsion spring 01 is in the energy storage state. When a leakage occurs, the electromagnetic release 32 is activated. Its tripping end instantaneously pushes the tripping lever 33 to swing relative to the first connecting column 311, causing the catch plate 34 to swing relative to the connecting shaft 03, and the abutting end 341 to disengage from the tripping lever 33 to achieve tripping. The tripping of the catch plate 34 causes the pressure relief spring 04 to release the stored energy. Through the cooperation of the transmission head 343 and the stroke groove 451, the locking latch 45 and the tripping latch 43 are disengaged. The tension spring 07 pulls the rotating frame 44 to move in the direction of opening. While moving, the rotating frame 44 pushes the locking latch 45 to push the operating mechanism 22 to trip and then achieve the opening of the circuit breaker. The leakage tripping mechanism 3 plays a role in leakage protection. When the circuit breaker is opening, the driving groove 4431 of the rotating frame 44 disengages the transmission foot 371 of the reset member 37, enabling the reset member 37 to quickly swing relative to the second connecting column 312 through the torque released after the first torsion spring 01 stores energy, thereby pushing the tripping end of the electromagnetic release 32 to reset for the next extension and tripping. The catch plate 34 pushes the positioning member 36 to swing relative to the sixth connecting column 317 through the bottom end of the rotating frame 44, and pushes the catch plate 34 to reset through the second limiting groove 342 for the next cooperation and locking limit with the tripping lever 33 during closing. The operating mechanism 22 includes a bracket 221 for installing the moving contact, a linkage latch 222 installed on the bracket 221, a linkage rod 223 connecting the handle 21 and the linkage latch 222, and a locking block 224 that cooperates with the linkage latch 222 for locking or tripping. Through the mutual cooperation of the catch plate 34, the tripping lever 33, the spring seat 35, the positioning member 36, and the reset member 37, the acting force received by the transmission assembly 4 during closing and opening can be reduced, and the acting force can be evenly distributed to each component, making the force more uniform, thereby improving the structural strength of the leakage tripping mechanism 3 and the transmission assembly 4, reducing the processing difficulty of production, and improving the reliability and stability of the leakage tripping mechanism 3 to achieve leakage tripping. By setting the transmission assembly 4, the leakage protection unit can be formed into a unit that can be independently closed and opened, thereby reducing the acting force received by the operating mechanism 22 during the opening and closing of the circuit breaker, and thus reducing the locking force between the tripping latch 43 and the locking latch 45 and between the linkage latch 222 and the locking block 224, improving the structural stability and operating life of the present invention.The present invention can drive the closing of the operating mechanism 22 and the leakage protection unit through a handle 21, without the need to perform secondary operation to close the leakage protection unit, improving the convenience of operation of the present invention. When the present invention is closed through the handle 21, the forces received by the operating mechanism 22 and the leakage protection unit can be distributed to the handle 21 through the driving rod 211, the linkage rod 223, the connecting rod 42, and the transmission handle 41, thereby reducing the acting force received when the linkage buckle 222 of the operating mechanism 22 is engaged with the locking block 224, making the locking place not easy to wear, the force at the locking place being evenly distributed, being able to reduce the requirements for materials and production precision of the linkage buckle 222 and the locking block 224, and thus reducing the production cost of the present invention. By providing the first connecting column 311, it is convenient for the installation and swinging of the tripping rod 33. By providing the second connecting column 312, it is convenient for the installation and swinging of the reset member 37, and it is also convenient for installing the first torsion spring 01 to be in abutting cooperation with the first connecting column 311 for energy storage, improving the stability of the structure of the present invention and the reliability of the reset of the tripping end of the release mechanism. By providing the third connecting column 313 and the fourth connecting column 315, it is convenient for the installation of the spring seat 35, thereby improving the stability of the spring seat 35 and the reliability of the energy storage of the pressure relief spring 04. By providing the installation groove 352, it is convenient for the installation of the pressure relief spring 04, thereby improving the stability of the pressure relief spring 04. By providing the pressure relief spring 04, it can store energy when the circuit breaker is closed, and can make the buckle plate 34 and the tripping rod 33 in abutting limit cooperation. When the leakage tripping mechanism 3 is tripped, the elastic force released by it pushes the buckle plate 34 to drive the trip buckle 43 to be disengaged from the locking buckle 45, thereby improving the reliability of tripping of the present invention. By providing the first torsion spring 01, it can cooperate with the reset member 37 to reset the tripping end of the release mechanism; by providing the second torsion spring 02, it can limit and reset the tripping rod 33, thereby improving the reliability of the present invention. By providing the transmission head 343 and the transmission foot 371, it is convenient for the transmission cooperation between the leakage tripping mechanism 3 and the transmission assembly 4, thereby improving the reliability of the transmission between various components of the present invention. By the cooperation of the convex platform 314 and the positioning groove 351, it is convenient for the positioning installation of the spring seat 35, thereby improving the convenience of assembly of the present invention. By providing the travel groove 451 and the drive groove 4431, it is convenient for them to cooperate with the transmission head 343 and the transmission foot 371 respectively, and by providing the communication groove 318, the structure of the present invention can be made more compact, thereby improving the structural strength of the leakage tripping mechanism 3 and the reliability of the present invention. By arranging the transmission handle 41 in the second chamber 12, its volume can be reduced, and then the space in the second chamber 12 can be reasonably utilized, the volume of the present invention can be correspondingly reduced, the structure is made more compact, and the structural strength and reliability of the leakage protection unit are improved.

[0050] In this embodiment, a positioning shaft 310 pivotally connected to the transmission handle 41 is provided on the base 31.

[0051] In the above structure, by setting the positioning shaft 310, the stability of the transmission handle 41 can be improved, thereby enhancing its stress strength and the stability of the present invention.

[0052] In this embodiment, a guide block 452 is convexly provided on one side of the latch 45 facing the operating mechanism 22, and the guide block 452 is open towards the opening direction of the moving contact.

[0053] With the above structure, when the operating mechanism 22 is closed, the drive rod 211 cooperates with the pushing port 411 to drive the transmission handle 41 to rotate and achieve closing. When the circuit breaker trips and opens due to reasons other than leakage, the reset of the operating mechanism 22 will not drive the reset of the leakage tripping mechanism 3, so that it is convenient for the inspection personnel to distinguish that the opening of the circuit breaker is not caused by leakage and is convenient for the inspection personnel to diagnose. When the leakage protection unit detects leakage and trips, the guide block 452 can cooperate with the transmission rod in the operating mechanism 22 to disengage the linkage buckle 222 and the locking block 224 of the operating mechanism 22, thereby enabling the present invention to trip and improving the reliability of the present invention.

[0054] In this embodiment, an indication area 444 is provided at the top of the rotating frame 44, an indication port 15 corresponding to the indication area 444 is opened on the housing 1, and two marks corresponding to closing and opening are provided in the indication area 444.

[0055] With the above structure, it is convenient for the inspection personnel to distinguish the current closing or opening state of the leakage tripping mechanism 3, and it is convenient for the maintenance personnel to observe whether the circuit breaker trips due to leakage, thereby improving the convenience of use and maintenance of the present invention.

[0056] In this embodiment, the bottom end of the rotating frame 44 is a limiting end 445 that cooperates with the positioning member 36. A power connection head 5 electrically connected to the circuit breaker terminal is installed on the limiting end 445, and a fifth torsion spring 08 for limiting the power connection head 5 is provided on the limiting end 445.

[0057] With the above structure, it is convenient for the circuit breaker to connect one end of the power supply when it is closed, so as to supply power to the test circuit, thereby improving the reliability of the present invention.

[0058] In this embodiment, a receiving block 332 corresponding to the tripping end is convexly provided at the bottom end of the tripping rod 33 towards the reset member 37.

[0059] With the above structure, the pushing area of the tripping end of the release driving the tripping rod 33 can be increased, thereby improving the tripping reliability of the present invention.

[0060] In this embodiment, a positioning end 344 is provided at one end of the buckle plate 34 facing the spring seat 35, and a positioning head 345 that cooperates with the pressure relief spring 04 is provided on the positioning end 344.

[0061] With the above structure, the stability of the installation of the pressure relief spring 04 can be improved, thereby improving the reliability of the present invention.

[0062] In this embodiment, a notch 446 is formed on the rotating frame 44, and one end of the connecting rod 42 connected to the jumping buckle 43 passes through the jumping buckle 43 and extends into the notch 446.

[0063] With the above structure, the connecting rod 42 can be limited, and further, the connection strength between the connecting rod 42 and the jumping buckle 43 can be improved, thereby improving the reliability of the present invention.

[0064] In this embodiment, connection heads 319 are provided at the ends of the first connecting column 311, the second connecting column 312, the third connecting column 313, the fourth connecting column 315, and the fifth connecting column 316. A cover plate adapted to be connected to the connection head 319 is covered on the spring seat 35, and an observation port is formed at a position corresponding to the pressure relief spring 04 on the cover plate.

[0065] With the above structure, the stability of the structure of the leakage tripping mechanism 3 can be further improved, and each component can be limited, thereby improving the structural strength of the present invention. By providing the observation port, it is convenient for the installer to install the pressure relief spring 04, thereby improving the assembly convenience of the present invention.

[0066] In this embodiment, a positioning bushing 141 adapted to the connecting shaft 03 is provided inside the second cover 14.

[0067] In the above structure, by providing the positioning bushing 141, the stability of the connecting shaft 03 can be improved, thereby improving the reliability of the present invention.

[0068] The above are only the preferred embodiments of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the technical principle of the present invention, several improvements and modifications can be made. These improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. An electromagnetic leakage protection circuit breaker, comprising a housing, a housing cover, a short-circuit protection unit mounted on the housing, an arc extinguishing device, a test device, a contact assembly, and an operating device for opening or closing the circuit breaker, wherein the operating device comprises a handle and an operating mechanism linked to the handle, the contact assembly comprises a moving contact and a stationary contact, the moving contact is connected to the operating mechanism, the stationary contact is mounted in the housing and arranged opposite to the moving contact, and is characterized in that: The shell is respectively provided with a first chamber and a second chamber on both sides, and the shell cover is provided with two groups, a first cover adapted to the first chamber and a second cover adapted to the second chamber respectively; it also includes a leakage protection unit, the leakage protection unit includes a leakage tripping mechanism and a transmission component which cooperates with the operating mechanism to control the closing or opening of the leakage tripping mechanism, the leakage tripping mechanism includes a base installed in the second chamber, an electromagnetic tripper, a tripping rod, a buckle plate, a spring seat, a positioning member and a reset member, the base is provided with a first connecting column pivotally matched with the tripping rod, the base is provided with a second connecting column pivotally matched with the reset member below the first connecting column, the tripping rod is provided with a first limiting groove, the reset member is sleeved with a first torsion spring with one end located in the first limiting groove and abutting against the outer wall of the second connecting column, and the other end abutting against the end of the reset member, the base is provided with a third connecting column at one end close to the handle, the third The spring has one end that is pivotally connected to the spring seat and has a second end that is pivotally connected to the spring seat, the other end of the pivotally connected spring is pivotally connected to the spring seat, and the other end of the pivotally connected spring is pivotally connected to the spring seat.The transmission assembly includes a transmission handle coaxially arranged with the handle and pivotally connected to the shell body, a connecting rod connected to the transmission handle, a jump buckle connected to the other end of the connecting rod, a rotating frame pivotally connected to the connecting shaft, and a lock buckle pivotally connected to the rotating frame and limited by the jump buckle. The transmission handle is sleeved with a third torsion spring for resetting the transmission handle after rotation. The lock buckle is provided with a travel groove matching with the side of the transmission head facing the transmission head. The rotating frame is provided with a convex column, and the convex column is sleeved with a fourth torsion spring for limiting the lock buckle. The rotating frame is provided with a hanging hole, and a fixed shaft is inserted in the second chamber of the shell, and the fixed shaft is connected to There is a tension spring, the other end of which is hooked in the hanging hole, and the tension spring is located in the opening direction of the moving contact. A connecting groove is provided on the base, and a limit block is provided on the rotating frame, which passes through the connecting groove to one side of the buckle plate. A driving groove matching the transmission foot is provided on the limit block, and the two ends of the positioning member are respectively limited and matched with the transmission rotating frame and the buckle plate. An arc groove is provided in the shell, which is coaxially arranged with the transmission handle and connects the first chamber and the second chamber. A driving rod is connected to the handle, which passes through the arc groove and drives the transmission handle to rotate. A pushing port is provided on the outer circumferential wall of the transmission handle, which is open in the opening direction and matches the driving rod. ; 2. The electromagnetic leakage protection circuit breaker according to claim 1, characterized in that: The base is provided with a positioning shaft which is pivotally connected with the transmission handle.

3. The electromagnetic leakage protection circuit breaker according to claim 1, characterized in that: A guide block is provided on a protrusion on one side of the lock buckle facing the operating mechanism, and the guide block is opened in the opening direction of the moving contact.

4. The electromagnetic leakage protection circuit breaker according to claim 3, characterized in that: An indication area is provided at the top of the rotating frame, and an indication port corresponding to the indication area is opened on the shell. The indication area is provided with two markings corresponding to closing and opening.

5. The electromagnetic leakage protection circuit breaker according to claim 1, characterized in that: The bottom end of the rotating frame is a limiting end matched with the positioning member, and an electric connection head electrically connected to the circuit breaker terminal is installed on the limiting end. A fifth torsion spring for limiting the electric connection head is provided on the limiting end.

6. The electromagnetic leakage protection circuit breaker according to claim 1, characterized in that: The bottom end of the tripping rod is protruding toward the reset member and is provided with a receiving block corresponding to the tripping end.

7. The electromagnetic leakage protection circuit breaker according to claim 1, characterized in that: A positioning end is provided at one end of the buckle plate facing the spring seat, and a positioning head matched with the pressure release spring is provided on the positioning end.

8. The electromagnetic leakage protection circuit breaker according to claim 1, characterized in that: The rotating frame is provided with a notch, and one end of the connecting rod connected with the jump buckle passes through the jump buckle into the notch.

9. The electromagnetic leakage protection circuit breaker according to claim 1, characterized in 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 that is adapted to be connected to the connecting heads, and an observation port is opened at a position on the cover plate corresponding to the pressure release spring.

10. The electromagnetic leakage protection circuit breaker according to claim 9, characterized in that: A positioning sleeve matched with the connecting shaft is arranged on the inner side of the second sealing cover.

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