Leakage protection circuit breaker

Abstract

The utility model provides a leakage protection circuit breaker, which comprises a shell, a shell cover, a short circuit protection device, an arc extinguishing device, an overload protection device, a test device, a contact assembly, a leakage protection device and an operation device, the electric leakage protection device comprises an electromagnetic tripper installed in the shell, a magnetic ring located below the electromagnetic tripper, an electromagnetic plate electrically connected with the electromagnetic tripper and the magnetic ring, and a transmission mechanism linked with the operation device. The transmission mechanism comprises a reset rod pivoted on the shell, a second lock catch coaxially arranged with the reset rod, an electric leakage bracket pivoted on the shell and positioned on the upper side of the reset rod, a second jump pin buckled and matched with the second lock catch and pivoted on the electric leakage bracket, a tripping rod linked with the electric leakage bracket, and a release rod linked with the tripping rod, wherein one end of the release rod is connected with the second jump pin and the other end of the release rod is connected with the second jump pin; and the other end of the second connecting rod is connected with the operating handle. The electric leakage protection device is high in reliability, reliable in tripping and high in safety.

Description

Technical Field

[0001] The utility model relates to the technical field of circuit breakers, in particular to a leakage protection circuit breaker. Background Art

[0002] The leakage protection circuit breaker has overload, short circuit and leakage protection functions, that is, it has the functions of a circuit breaker and a leakage protector. Therefore, the leakage protection circuit breaker is a commonly used protection device in electrical circuits, and is widely used in mobile electrical equipment and handheld power tools; electrical equipment installed in humid, highly corrosive and other harsh places; 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 baths; power supply lines and equipment installed in water; electrical medical equipment in hospitals that directly contact the human body, etc.

[0003] In the prior art, the electronic type of leakage tripping is realized by releasing a signal through the PCB board. The PCB board needs to be connected to the power supply. When the voltage is extremely low or the voltage is lost, the PCB board will not release the tripping signal, and the circuit breaker cannot complete the tripping, which poses a safety hazard. Utility Model Content

[0004] Based on the above problems, the purpose of the utility model is to provide a leakage protection circuit breaker with high leakage tripping rate and high safety.

[0005] In view of the above problems, the following technical solutions are provided: a leakage protection circuit breaker, comprising a shell, a shell cover, a short-circuit protection device, an arc extinguishing device, an overload protection device, a test device and a contact assembly, wherein the contact assembly comprises a moving contact and a static contact, and also comprises a leakage protection device and an operating device for controlling the displacement of the moving contact to realize opening or closing the switch, wherein the leakage protection device comprises an electromagnetic release installed in the shell, a magnetic ring located below the electromagnetic release, an electromagnetic plate electrically connected to the electromagnetic release and the magnetic ring, and a transmission mechanism linked to the operating device, wherein the operating device comprises an operating handle pivoted to the shell, a bracket pivoted to the shell and located at the lower side of the operating handle, a first trip button pivoted to the bracket, and a trip button pivoted to the bracket and located at the first trip button The cam is configured to move the locking cam into the locking cam, wherein the locking cam is configured to move the locking cam towards the first locking cam, and the locking cam is configured to move the locking cam towards the first locking cam. The transmission mechanism is located at the other end of the operating handle opposite to the first connecting rod, and the transmission mechanism includes a reset rod pivoted on the shell, a second lock buckle coaxially arranged with the reset rod, a leakage bracket pivoted on the shell and located on the upper side of the reset rod, a second jump buckle that is buckled with the second lock buckle and pivoted on the leakage bracket, a tripping rod linked to the leakage bracket, and a second connecting rod connected to the second jump buckle at one end and the operating handle at the other end, one end of the reset rod abuts against the ejector pin of the electromagnetic release, and the other end extends toward the leakage bracket to form an abutment portion, a first fixing column is provided on the shell at the upper side of the reset rod, a first torsion spring is sleeved on the first fixing column, one end of the second lock buckle abuts against the lower end of the first torsion spring, and the other end is buckled with the second jump buckle The second locking buckle is provided with a second torsion spring coaxially arranged therewith, and the two ends of the second torsion spring respectively abut the first torsion block and the lower part of the second torsion block; the second locking buckle is provided with a push block abutting and matching with the outer circle of the reset rod; a third torsion spring coaxially arranged therewith is provided in the leakage bracket; an open groove abutting and matching with the two ends of the third torsion spring is provided at the end of the leakage bracket; the lower end of the third torsion spring extends downward to abut and match with the outer side of the abutting part; a groove body for limiting the tripping rod is provided on the shell below the operating handle.A limiting block is provided on the side of the tripping rod facing the bracket relative to the first lock catch and abutting against it.

[0006] In the above structure, in the closed state, when the magnetic ring senses the leakage, the ejector pin of the electromagnetic release pops out, pushing the reset rod to swing relative to the pivot point, and the second lock buckle, the second jump buckle and the leakage bracket are linked with the swing of the reset rod, the second lock buckle and the second jump buckle are released, the leakage bracket drives the second jump buckle to swing, drives the release rod to move, the release rod pushes the first lock buckle to swing through the limit block, the first lock buckle is released from the first jump buckle, the bracket drives the moving contact to move in the opposite direction relative to the static contact, the operating handle drives the first connecting rod through the first jump buckle, and the second jump buckle drives the second connecting rod to reset, thereby realizing the opening of the utility model; when the utility model is closed, the control operation The handle swings toward the closing direction, and the operating handle controls the first trip button and the second trip button to swing through the first connecting rod and the second connecting rod, thereby driving the bracket and the leakage bracket to swing, and the bracket drives the moving contact to swing toward the static contact. When the operating handle swings to the closing position, the moving contact abuts against the static contact, and the first trip button swings through the first connecting rod to abut against the first lock button to achieve the limit of the first lock button and the bracket; the trip rod moves in the same direction relative to the closing direction of the operating handle as the leakage bracket swings, and the second lock button pushes the reset rod to swing through the push block to press the ejector pin of the electromagnetic release back into the electromagnetic release, thereby facilitating the leakage protection device to perform leakage protection and realize the closing of the utility model. The leakage protection of the utility model is realized by the electromagnetic release, and its reliability is high, thereby improving the safety of the utility model; and the electromagnetic release is small in size, which can further reduce the overall size of the utility model. Setting the first lock catch to correspond to the short-circuit protection device can facilitate the present invention to drive the first lock catch to swing through the top rod of the short-circuit protection device to achieve tripping when a short circuit occurs, thereby achieving the separation of the moving contact and the static contact, and realizing the opening of the present invention, further improving the safety of the present invention. By setting the tension spring, the force of the bracket to drive the moving contact to reset can be increased when tripping, thereby improving the reliability and safety of the opening of the present invention. By setting the lock catch spring, the locking force between the first lock catch and the first jump catch can be increased, thereby improving the reliability of the closing of the present invention. By setting the first accommodating groove and the second accommodating groove, the stability of the lock catch spring installation can be improved, thereby improving the reliability of the operating machine device. By setting the spacer, the installation of the internal parts of the present invention can be facilitated, thereby improving the convenience of assembly of the present invention. By setting the first torsion spring and the second torsion spring, the second lock catch can be limited, and the force of the second lock catch to drive the reset rod to move can be increased, thereby improving the reliability of the reset rod controlling the reset of the electromagnetic release ejector pin. The third torsion spring can be provided to limit the reset rod, thereby preventing the reset rod from self-swinging, further improving the reliability and safety of the utility model. The first stop block can facilitate the reset rod to cooperate with the second torsion spring, thereby facilitating the ejector pin of the electromagnetic release to push the reset rod to swing, thereby improving the reliability of the utility model.The second abutment block can facilitate the abutment and cooperation between the second lock catch and the second torsion spring, thereby improving the reliability of the transmission mechanism. The distance from the end of the reset rod abutting against the electromagnetic release to the reset rod pivot point is greater than the distance from the abutment portion to the reset rod pivot point, and the arrangement of the second torsion spring can enable the reset rod to swing by being driven by a relatively small force from the electromagnetic release ejector, thereby improving the reliability and safety of the utility model.

[0007] The utility model is further configured such that a protrusion at one end of the second lock buckle that abuts against the first torsion spring is provided with a limiting ridge.

[0008] In the above structure, the first torsion spring can be limited by providing the limiting ridge, thereby improving the stability of the first torsion spring and the reliability of the utility model.

[0009] The utility model is further configured such that the operating handle includes a main handle connected to the first connecting rod and a secondary handle coaxially arranged with the main handle and connected to the second connecting rod, the main handle is provided with a push handle, a positioning groove is provided on the push handle toward the closing direction, and the secondary handle is provided with a positioning block adapted to the positioning groove.

[0010] In the above structure, the positioning block cooperates with the positioning groove and the limit block on the reset rod cooperates with the first lock buckle, so that when the leakage protection device is started, the auxiliary handle can be reset and the main handle can be driven to reset the switch at the same time; in the event of an overload or short circuit in the utility model, the overload protection device or the short circuit protection device starts to control the first lock buckle to trip, and when the utility model is opened, the first lock buckle is not limited on the other side of the limit block on the reset rod relative to the first lock buckle, and then the main handle is reset, and the auxiliary handle will not be reset. Therefore, when the utility model trips, when the main handle and the auxiliary handle are reset together, it can be judged that a leakage occurs and the auxiliary handle is not reset. When the main handle is reset, the worker needs to further confirm the cause of the tripping, thereby improving the convenience of fault repair of the utility model.

[0011] The utility model is further configured that a second fixing column for the leakage bracket to be sleeved is provided on the shell, a cover plate is provided on the side of the transmission component facing the shell cover, and two pipe columns adapted to the first fixing column and the second fixing column are provided on the cover plate.

[0012] In the above structure, the transmission mechanism can be limited by setting the cover plate, thereby improving the stability of the transmission mechanism and the reliability of the utility model. The first fixing column and the second fixing column can be improved by setting the pipe column, thereby further improving the stability of the transmission mechanism structure.

[0013] The utility model is further configured as follows: two moving contacts are provided, which are pivotally connected to both sides of the bracket respectively; a limiting torsion spring is provided on the two moving contacts for limiting the moving contact; one end of the limiting torsion spring facing the shell cover side is provided with an extension section extending toward the cover plate; the test device includes a test button, a button spring located below the test button, a contact spring located on the cover plate and a button sheet located on one side of the contact spring; a first connecting column for the button spring to be sleeved and a second connecting column for the contact spring to be sleeved are provided on the cover plate; one end of the button spring abuts against the bottom of the test button, and abuts against the button sheet when the test button is pressed; the other end is connected to one end of the contact spring; the other end of the contact spring is located at the lower side of the extension section; when the moving contact and the static contact are in the closed state, the extension section abuts against the contact spring.

[0014] In the above structure, a connecting wire is connected to the terminal on one side of the magnetic ring, and the other end of the connecting wire is connected to a test resistor electrically connected to the button sheet. In the closed state, one end of the limit torsion spring abuts against the contact spring, and the test button is pressed, so that the button spring abuts against the button sheet, thereby generating leakage, and the leakage protection device is activated, and the utility model is opened, and the operating handle is reset; in the open state, the limit torsion spring does not abut against the contact spring, and after the test button is pressed, a circuit cannot be generated, thereby improving the safety and reliability of the utility model. In the existing leakage protection circuit breaker, in the open state, its moving contact is still in a state of being connected to the test circuit, and is easily in a charged state. When the test button is pressed, the circuit breaker is easily damaged. Therefore, in the open state, the limit torsion spring of the utility model does not abut against the contact spring, does not carry current, and cannot generate a circuit. Compared with the existing leakage protection circuit breaker, the utility model is safer.

[0015] The utility model is further configured that a partition is provided on the cover plate between the button spring and the extension section.

[0016] By adopting the above structure, the creepage distance between the two can be increased, thereby improving the reliability of the utility model.

[0017] The utility model is further configured that the cover plate is provided with a limiting groove for installing the contact spring.

[0018] The above structure can facilitate the installation of the contact spring and can limit the contact spring, thereby improving the convenience of assembly of the utility model.

[0019] The utility model is further configured that a clamping groove for clamping the button sheet is provided on one side of the cover plate located at the limiting groove.

[0020] The above structure can improve the convenience of assembly of the utility model.

[0021] The utility model is further configured that a mounting groove for accommodating the end of the button spring is provided at the bottom of the test button, and an inverted arc is provided at one end of the mounting groove abutting against the button spring.

[0022] By adopting the above structure, one end of the button spring can be limited, and the test button and the button spring can be easily matched and abutted, thereby improving the reliability of the utility model.

[0023] The utility model is further configured that a clearance opening is provided on one side of the installation groove toward the cover plate, and a stop block is provided on the cover plate at a position corresponding to the clearance opening.

[0024] In the above structure, the stop block cooperates with the clearance opening, so as to improve the stability of the displacement of the test button, thereby improving the reliability of the utility model. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a structural schematic diagram of the utility model.

[0026] Figure 2 It is a schematic diagram of the structure of the utility model without the shell installed.

[0027] Figure 3 It is a schematic diagram of the structure of the utility model without the shell cover installed.

[0028] Figure 4 It is a schematic diagram of the structure in which the operating device of the utility model is located inside the shell cover.

[0029] Figure 5 It is a schematic diagram of the structure in which the transmission mechanism of the utility model is located inside the shell cover.

[0030] Figure 6 It is a structural schematic diagram of the transmission mechanism in the utility model.

[0031] Figure 7 It is a structural schematic diagram of some parts of the transmission mechanism in the utility model.

[0032] Figure 8 It is a structural schematic diagram of the tripping rod in the utility model.

[0033] Fig. 9 It is a structural schematic diagram of the reset rod in the utility model.

[0034] Fig.10 It is a structural schematic diagram of the cover plate in the utility model.

[0035] Fig.11 It is a schematic diagram of the structure of the test device in the utility model.

[0036] Fig.12 It is a structural schematic diagram of the operating handle in the utility model.

[0037] Fig.13 It is a schematic cross-sectional structural diagram of the operating handle in the utility model.

[0038] Meaning of the numbers in the figure: 1-shell; 2-shell cover; 3-short-circuit protection device; 4-arc extinguishing device; 5-overload protection device; 6-test device; 7-contact assembly; 71-moving contact; 72-static contact; 8-leakage protection device; 9-operating device; 81-electromagnetic release; 82-magnetic ring; 83-electromagnetic plate; 84-transmission mechanism; 91-operating handle; 92-bracket; 93-first trip buckle; 94-first lock buckle; 95-first connecting rod; 01-spacer; 011-limiting opening 921-bump; 922-first accommodating groove; 941-second accommodating groove; 02-locking spring; 03-tension spring; 841-reset rod; 842-second lock buckle; 843-leakage bracket; 844-second trip buckle; 845-trip rod; 846-second connecting rod; 8411-abutment portion; 11 - first fixing column; 111- first torsion spring; 8412- first stop block; 8421- second stop block; 8422- second torsion spring; 8423- push block; 04- third torsion spring; 8431- opening slot; 12- slot body; 8451- limit block; 8424- limit convex ridge; 911- main handle; 912- auxiliary handle; 9111- push handle; 9112- positioning slot; 9121- fixed Position block; 12-second fixed column; 05-cover plate; 051-tube column; 06-limit torsion spring; 061-extension section; 61-test button; 62-button spring; 63-contact spring; 64-button sheet; 052-first connecting column; 053-second connecting column; 07-partition plate; 054-limiting groove; 055-clamping groove; 611-installation groove; 612-yield opening; 056-stop block. DETAILED DESCRIPTION

[0039] The following is a further detailed description of the specific implementation of the present invention 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.

[0040] It should be noted that all directional indications (such as up, down, left, right, front, back, backside...) in the embodiments of the present invention are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0041] like Figures 1 to 13A leakage protection circuit breaker shown in the figure includes a shell 1, a shell cover 2, a short-circuit protection device 3, an arc extinguishing device 4, an overload protection device 5, a test device 6 and a contact assembly 7, wherein the contact assembly 7 includes a moving contact 71 and a stationary contact 72, and also includes a leakage protection device 8 and an operating device 9 for controlling the displacement of the moving contact 71 to realize opening or closing the switch, wherein the leakage protection device 8 includes an electromagnetic release 81 installed in the shell 1, a magnetic ring 82 located below the electromagnetic release 81, an electromagnetic plate 83 electrically connected to the electromagnetic release 81 and the magnetic ring 82, and a transmission mechanism 84 linked to the operating device 9, wherein the operating device 9 includes an operating handle 91 pivotally connected to the shell 1, a support pivotally connected to the shell 1 and located below the operating handle 91. The bracket 92 is provided with a first jump buckle 93 pivotally connected to the bracket 92, a first lock buckle 94 pivotally connected to the bracket 92 and located on the side of the first jump buckle 93 facing the static contact 72, and a first connecting rod 95 connecting the operating handle 91 and the first jump buckle 93 at both ends, the bracket 92 is installed in the shell 1, a spacer 01 is provided between the shell 1 and the shell cover 2, a limited position opening 011 is provided at a position corresponding to the bracket 92 on the spacer 01, a convex block 921 located on the outside thereof is protruded toward the first lock buckle 94 on the bracket 92, the convex block 921 is provided with a first accommodating groove 922 toward the outer edge of the first lock buckle 94, a second accommodating groove 941 corresponding to the first accommodating groove 922 is provided on the outer edge of the first lock buckle 94, and the first A lock spring 02 is provided between the lock catch 94 and the protrusion 921, and its two ends are respectively abutted against the first accommodating groove 922 and the second accommodating groove 941. A tension spring 03 is provided below the operating handle 91 at a position on the side of the spacer 01 facing the shell cover 2. One end of the tension spring 03 is connected to the shell 1 through a pin shaft, and the other end is hooked on the bracket 92. The transmission mechanism 84 is located at the other end of the operating handle 91 relative to the first connecting rod 95. The transmission mechanism 84 includes a reset rod 841 pivoted on the shell 1, a second lock catch 842 coaxially arranged with the reset rod 841, a leakage bracket 843 pivoted on the shell 1 and located on the upper side of the reset rod 841, and a second jump catch 84 engaged with the second lock catch 842 and pivoted on the leakage bracket 843. 4. A trip rod 845 linked to the leakage bracket 843 and a second connecting rod 846 connected to the second trip buckle 844 at one end and the operating handle 91 at the other end. One end of the reset rod 841 abuts against the ejector pin of the electromagnetic release 81, and the other end extends toward the leakage bracket 843 to form an abutment portion 8411. A first fixing column 11 is provided on the upper side of the reset rod 841 on the shell 1. A first torsion spring 111 is sleeved on the first fixing column 11. One end of the second lock buckle 842 abuts against the lower end of the first torsion spring 111, and the other end is buckled with the second trip buckle 844. The other end of the first torsion spring 111 abuts against the inner wall of the shell 1. A first abutment block 8412 is provided on the side of the reset rod 841 facing the shell cover 2.The second locking buckle 842 is provided with a second stop block 8421 on the side facing the shell cover 2 at one end that cooperates with the second jump buckle 844. The second locking buckle 842 is sleeved with a second torsion spring 8422 coaxially arranged therewith. The two ends of the second torsion spring 8422 abut against the first stop block 8412 and the lower part of the second stop block 8421 respectively. The second locking buckle 842 is provided with a push block 8423 abutting against the outer circle of the reset rod 841. The leakage bracket 843 is provided with a second torsion spring 8422 coaxially arranged therewith. The third torsion spring 04 is arranged on the shaft, and the end of the leakage bracket 843 is provided with an open groove 8431 that abuts and cooperates with the two ends of the third torsion spring 04. The lower end of the third torsion spring 04 extends downward to abut and cooperate with the outside of the abutment part 8411. The housing 1 is provided with a groove 12 below the operating handle 91 to limit the tripping rod 845. The tripping rod 845 is provided with a limit block 8451 that abuts and cooperates with the first lock buckle 94 on the side facing the bracket 92.

[0042] In the above structure, in the closed state, when the magnetic ring 82 senses the leakage, the ejector pin of the electromagnetic release 81 pops out, pushing the reset rod 841 to swing relative to the pivot point, and the second lock buckle 842, the second jump buckle 844 and the leakage bracket 843 are linked with the swing of the reset rod 841, the second lock buckle 842 and the second jump buckle 844 are released, the leakage bracket 843 drives the second jump buckle 844 to swing, drives the release rod 845 to move, the release rod 845 pushes the first lock buckle 94 to swing through the limit block 8451, the first lock buckle 94 is released from the first jump buckle 93, the bracket 92 drives the moving contact 71 to move in the opposite direction relative to the static contact 72, the operating handle 91 drives the first connecting rod 95 through the first jump buckle 93, and the second jump buckle 844 drives the second connecting rod 846 to reset, thereby realizing the opening of the utility model; when the utility model is closed, the control operation The handle 91 swings in the closing direction, and the operating handle 91 controls the first trip buckle 93 and the second trip buckle 844 to swing through the first connecting rod 95 and the second connecting rod 846, thereby driving the bracket 92 and the leakage bracket 843 to swing, and the bracket 92 drives the moving contact 71 to swing toward the static contact 72. When the operating handle 91 swings to the closing position, the moving contact 71 abuts against the static contact 72, and the first trip buckle 93 swings to abut against the first lock buckle 94 through the first connecting rod 95 to achieve the limitation of the first lock buckle 94 and the bracket 92; the tripping rod 845 is displaced in the same direction relative to the closing direction of the operating handle 91 as the leakage bracket 843 swings, and the second lock buckle 842 pushes the reset rod 841 to swing through the push block 8423 to press the ejector pin of the electromagnetic release 81 back into the electromagnetic release 81, thereby facilitating the leakage protection device 8 to perform leakage protection and realize the closing of the utility model. The leakage protection of the utility model is realized by the electromagnetic release 81, which has high reliability, thereby improving the safety of the utility model; and the electromagnetic release 81 is small in size, which can further reduce the overall volume of the utility model. The first lock buckle 94 is arranged corresponding to the short-circuit protection device 3, which can facilitate the utility model to drive the first lock buckle 94 to swing through the top rod of the short-circuit protection device 3 when a short circuit occurs, so as to achieve the tripping, thereby achieving the separation of the moving contact 71 and the static contact 72, and realizing the opening of the utility model, further improving the safety of the utility model. By setting the tension spring 03, the force of the bracket 92 to drive the moving contact 71 to reset can be increased when the tripping occurs, thereby improving the reliability and safety of the opening of the utility model. By setting the lock buckle spring 02, the locking force between the first lock buckle 94 and the first jump buckle 93 can be increased, thereby improving the reliability of the closing of the utility model. By setting the first accommodating groove 922 and the second accommodating groove 941, the stability of the installation of the lock buckle spring 02 can be improved, thereby improving the reliability of the operating machine device.By setting the spacer 01, the installation of the internal parts of the utility model can be facilitated, thereby improving the convenience of assembly of the utility model, and the static contact 72 is installed on the spacer 01, which improves the stability of the short-circuit protection device 3. By setting the first torsion spring 111 and the second torsion spring 8422, the second lock 842 can be limited, and the force of the second lock 842 to drive the reset rod 841 to move can be increased, thereby improving the reliability of the reset rod 841 controlling the reset of the ejector pin of the electromagnetic release 81. By setting the third torsion spring 04, the reset rod 841 can be limited to avoid the reset rod 841 from self-swinging, further improving the reliability of the utility model and improving the safety of the utility model. By setting the first stop block 8412, the reset rod 841 can be easily matched with the second torsion spring 8422, thereby facilitating the ejector pin of the electromagnetic release 81 to push the reset rod 841 to swing, thereby improving the reliability of the utility model. The second abutment block 8421 can facilitate the abutment and cooperation between the second lock catch 842 and the second torsion spring 8422, thereby improving the reliability of the transmission mechanism 84. The distance between the end of the reset rod 841 abutting against the electromagnetic release 81 and the pivot point of the reset rod 841 is greater than the distance between the abutment portion 8411 and the pivot point of the reset rod 841, and the arrangement of the second torsion spring 8422 can enable the reset rod 841 to swing by being driven by a relatively small force of the electromagnetic release ejector, thereby improving the reliability and safety of the utility model.

[0043] In this embodiment, a protrusion at one end of the second lock buckle 842 that abuts against the first torsion spring 111 is provided with a limiting ridge 8424 .

[0044] In the above structure, the first torsion spring 111 can be limited by providing the limiting ridge 8424, thereby improving the stability of the first torsion spring 111 and improving the reliability of the utility model.

[0045] In this embodiment, the operating handle 91 includes a main handle 911 connected to the first connecting rod 95 and a secondary handle 912 coaxially arranged with the main handle 911 and connected to the second connecting rod 846. The main handle 911 is provided with a push handle 9111, and a positioning groove 9112 is provided on the push handle 9111 toward the closing direction. The secondary handle 912 is provided with a positioning block 9121 adapted to the positioning groove 9112.

[0046] In the above structure, by cooperating with the positioning block 9121 and the positioning groove 9112 and by cooperating with the limit block 8451 on the reset rod 841 and the first lock buckle 94, when the leakage protection device 8 is started, the auxiliary handle 912 can be opened and reset, and at the same time, the main handle 911 can be opened and reset; in the case of overload or short circuit in the utility model, the overload protection device 5 or the short circuit protection device 3 starts to control the first lock buckle 94 to trip, and when the utility model is opened, since the other side of the reset rod 841 relative to the first lock buckle 94 toward the limit block 8451 does not limit the first lock buckle 94, the main handle 911 is reset, and the auxiliary handle 912 is not reset. Therefore, when the utility model trips, when the main handle 911 and the auxiliary handle 912 are reset together, it can be judged that a leakage situation has occurred, and the auxiliary handle 912 has not been reset. When the main handle 911 is reset, the worker needs to further confirm the cause of the tripping, thereby improving the convenience of fault repair of the utility model.

[0047] In this embodiment, the shell 1 is provided with a second fixing column 12 for the leakage bracket 843 to be sleeved, and the transmission assembly is provided with a cover plate 05 on the side facing the shell cover 2. The cover plate 05 is provided with two pipe columns 051 adapted to the first fixing column 11 and the second fixing column 12.

[0048] In the above structure, the cover plate 05 can be provided to limit the transmission mechanism 84, thereby improving the stability of the transmission mechanism 84 and the reliability of the utility model. The pipe column 051 can be provided to improve the stability of the first fixing column 11 and the second fixing column 12, thereby further improving the stability of the transmission mechanism 84 structure.

[0049] In this embodiment, the moving contacts 71 are provided with two, which are pivotally connected to both sides of the bracket 92 respectively. The two moving contacts 71 are provided with a limiting torsion spring 06 for limiting the moving contact 71. One end of the limiting torsion spring 06 facing the side of the shell cover 2 is extended toward the cover plate 05 to provide an extension section 061. The test device 6 includes a test button 61, a button spring 62 located below the test button 61, a contact spring 63 located on the cover plate 05, and a button sheet 64 located on one side of the contact spring 63. The cover plate 05 is provided with a first connecting column 052 for sleeved button spring 62 and a second connecting column 053 for sleeved contact spring 63. One end of the button spring 62 abuts against the bottom of the test button 61, and abuts against the button sheet 64 when the test button 61 is pressed. The other end is connected to one end of the contact spring 63. The other end of the contact spring 63 is located at the lower side of the extension section 061. When the moving contact 71 and the static contact 72 are in the closed state, the extension section 061 abuts against the contact spring 63.

[0050] In the above structure, a connecting wire is connected to the terminal on one side of the magnetic ring 82, and a test resistor electrically connected to the button sheet 64 is connected to the other end of the connecting wire. In the closed state, one end of the limit torsion spring 06 abuts against the contact spring 63, and the test button 61 is pressed, and the button spring 62 abuts against the button sheet 64, thereby generating leakage, and the leakage protection device 8 is activated, and the utility model is opened, and the operating handle 91 is reset; in the open state, the limit torsion spring 06 does not abut against the contact spring 63, and after pressing the test button 61, a circuit cannot be generated, thereby improving the safety and reliability of the utility model. In the existing leakage protection circuit breaker, in the open state, its moving contact 71 is still in a state of being connected to the test circuit, and is easily in a charged state. When the test button 61 is pressed, the circuit breaker is easily damaged. Therefore, in the open state of the utility model, the limit torsion spring 06 does not abut against the contact spring 63, does not carry current, and cannot generate a circuit, thereby compared with the existing leakage protection circuit breaker, the utility model has better safety.

[0051] In this embodiment, a partition plate 07 is provided on the cover plate 05 between the button spring 62 and the extension section 061 .

[0052] By adopting the above structure, the creepage distance between the two can be increased, thereby improving the reliability of the utility model.

[0053] In this embodiment, a limiting groove 054 for installing the contact spring 63 is formed on the cover plate 05 .

[0054] The above structure can facilitate the installation of the contact spring 63 and limit the contact spring 63, thereby improving the convenience of assembly of the utility model.

[0055] In this embodiment, a snap-in groove 055 for snapping in with the button piece 64 is provided on one side of the limiting groove 054 on the cover plate 05 .

[0056] The above structure can improve the convenience of assembly of the utility model.

[0057] In this embodiment, a mounting groove 611 for accommodating the end of the button spring 62 is formed at the bottom of the test button 61 , and one end of the mounting groove 611 that abuts against the button spring 62 is in the shape of a chamfered arc.

[0058] By adopting the above structure, one end of the button spring 62 can be limited, and the test button 61 and the button spring 62 can be easily matched and abutted, thereby improving the reliability of the utility model.

[0059] In this embodiment, a clearance opening 612 is formed on one side of the installation groove 611 facing the cover plate 05 , and a stop block 056 is provided at a position on the cover plate 05 corresponding to the clearance opening 612 .

[0060] In the above structure, the stop block 056 cooperates with the clearance opening 612 to improve the stability of the displacement of the test button 61, thereby improving the reliability of the utility model.

[0061] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications of the above assumptions should also be regarded as the protection scope of the present invention.

Claims

1. A leakage protection circuit breaker, comprising a housing, a housing cover, a short circuit protection device, an arc extinguishing device, an overload protection device, a test device and a contact assembly, wherein the contact assembly comprises a moving contact and a stationary contact, and is characterized in that: It also includes a leakage protection device and an operating device for controlling the displacement of a moving contact to open or close the switch, the leakage protection device includes an electromagnetic release installed in a shell, a magnetic ring located below the electromagnetic release, an electromagnetic plate electrically connected to the electromagnetic release and the magnetic ring, and a transmission mechanism linked to the operating device, the operating device includes an operating handle pivoted on the shell, a bracket pivoted on the shell and located on the lower side of the operating handle, a first jump buckle pivoted on the bracket, a first lock buckle pivoted on the bracket and located on the side of the first jump buckle facing the static contact, and a first connecting rod with the operating handle and the first jump buckle connected at both ends, the bracket is installed in the shell, a spacer is provided between the shell and the shell cover, and a spacer is connected to the bracket on the spacer A limited position opening is provided at a corresponding position, a protrusion located on the outside of the bracket protrudes toward the first lock buckle, a first receiving groove is provided on the protrusion toward the outer edge of the first lock buckle, a second receiving groove corresponding to the first receiving groove is provided on the outer edge of the first lock buckle, a lock buckle spring with two ends respectively abutting against the first receiving groove and the second receiving groove is provided between the first lock buckle and the protrusion, a tension spring is provided below the operating handle at a position of the spacer toward the shell cover, one end of the tension spring is connected to the shell through a pin shaft, and the other end is hooked on the bracket, the transmission mechanism is located at the other end of the operating handle opposite to the first connecting rod, and the transmission mechanism includes a reset rod pivotally connected to the shell, and a second lock buckle coaxially arranged with the reset rod , a leakage bracket pivotally connected to the shell and located on the upper side of the reset rod, a second jump buckle that is buckled with the second lock buckle and pivotally connected to the leakage bracket, a trip rod linked to the leakage bracket, and a second connecting rod with one end connected to the second jump buckle and the other end connected to the operating handle, one end of the reset rod abuts against the ejector pin of the electromagnetic releaser, and the other end extends toward the leakage bracket to form an abutment portion, a first fixing column is provided on the shell and located on the upper side of the reset rod, a first torsion spring is sleeved on the first fixing column, one end of the second lock buckle abuts against the lower end of the first torsion spring, and the other end is buckled with the second jump buckle, the other end of the first torsion spring abuts against the inner wall of the shell, and a first abutment block is provided on the side of the reset rod facing the shell cover, and the first A second stop block is provided on the side of the shell cover at one end of the second lock buckle that cooperates with the second jump buckle, and the second lock buckle is sleeved with a second torsion spring coaxially arranged therewith, and the two ends of the second torsion spring respectively abut against the first stop block and the bottom of the second stop block, and the second lock buckle is provided with a push block abutting and cooperating with the outer circle of the reset rod, and a third torsion spring coaxially arranged therewith is provided in the leakage bracket, and an open groove abutting and cooperating with the two ends of the third torsion spring is provided at the end of the leakage bracket, and the lower end of the third torsion spring extends downward to abut and cooperate with the outside of the abutting part, and a groove body for limiting the trip rod is provided on the shell below the operating handle, and a limit block abutting and cooperating with the trip rod is provided on the side of the trip rod relative to the first lock buckle toward the bracket.

2. A leakage protection circuit breaker according to claim 1, characterized in that: A protrusion at one end of the second lock buckle that abuts against the first torsion spring is provided with a limiting ridge.

3. A leakage protection circuit breaker according to claim 1, characterized in that: The operating handle includes a main handle connected to the first connecting rod and a secondary handle coaxially arranged with the main handle and connected to the second connecting rod. The main handle is provided with a push handle, and a positioning groove is opened on the push handle toward the closing direction. The secondary handle is provided with a positioning block adapted to the positioning groove.

4. A leakage protection circuit breaker according to claim 1, characterized in that: The shell is provided with a second fixing column for the leakage bracket to be sleeved, and the transmission mechanism is provided with a cover plate on the side facing the shell cover, and the cover plate is provided with two pipe columns matched with the first fixing column and the second fixing column.

5. A leakage protection circuit breaker according to claim 4, characterized in that: The two moving contacts are pivotally connected to both sides of the bracket respectively. The two moving contacts are each provided with a limiting torsion spring for limiting the moving contact. One end of the limiting torsion spring facing the shell cover is provided with an extension section extending toward the cover plate. The test device includes a test button, a button spring located below the test button, a contact spring located on the cover plate, and a button sheet located on one side of the contact spring. The cover plate is provided with a first connecting column for the button spring to be socketed and a second connecting column for the contact spring to be socketed. One end of the button spring abuts against the bottom of the test button, and when the test button is pressed, it abuts against the button sheet. The other end is connected to one end of the contact spring. The other end of the contact spring is located at the lower side of the extension section. When the moving contact and the static contact are in the closed state, the extension section abuts against the contact spring.

6. A leakage protection circuit breaker according to claim 5, characterized in that: A partition is provided on the cover plate between the button spring and the extension section.

7. A leakage protection circuit breaker according to claim 6, characterized in that: The cover plate is provided with a limiting groove for installing a contact spring.

8. A leakage protection circuit breaker according to claim 7, characterized in that: A clamping groove for clamping the button sheet is provided on one side of the cover plate located at the limiting groove.

9. A leakage protection circuit breaker according to claim 8, characterized in that: The bottom end of the test button is provided with a mounting groove for accommodating the end of the button spring, and one end of the mounting groove abutting against the button spring is arranged in a chamfered arc.

10. A leakage protection circuit breaker according to claim 9, characterized in that: A clearance opening is provided on one side of the installation groove facing the cover plate, and a stop block is provided on the cover plate at a position corresponding to the clearance opening.

Images