An operating device for leakage protection circuit breaker

Abstract

The present invention provides an operating device for a leakage protection circuit breaker, comprising an operating handle pivotally connected to the housing of the circuit breaker, a bracket pivotally connected to the housing and located below the operating handle, a first trip latch pivotally connected to the bracket, a first lock latch pivotally connected to the bracket and located on the side of the first trip latch facing the static contact, and a first connecting rod connecting the operating handle and the first trip latch at both ends. The device also includes a transmission mechanism that cooperates with the operating handle, wherein the bracket is provided with a protrusion located on its outer side protruding toward the first lock latch, the protrusion is provided with a first receiving groove toward the outer edge of the first lock latch, the outer edge of the first lock latch is provided with a second receiving groove corresponding to the first receiving groove, a lock latch spring is provided between the first lock latch and the protrusion, the two ends of the lock latch respectively abutting the first and second receiving grooves, and a tension spring is provided below the operating handle. The present invention provides a leakage protection circuit breaker with a high leakage tripping rate, high safety, and smooth conduction.

Description

Technical Field

[0001] The present invention relates to the technical field of circuit breakers, and in particular to an operating device for a leakage protection circuit breaker. Background Art

[0002] Leakage current circuit breakers offer overload, short-circuit, and leakage protection—combining the functions of both a circuit breaker and a leakage protector. Therefore, leakage current circuit breakers are commonly used as protective devices in electrical circuits, and are widely used in mobile electrical equipment and handheld power tools; electrical equipment installed in harsh environments such as humid and highly corrosive environments; electrical construction machinery and equipment at construction sites; socket circuits within buildings such as schools, businesses, and residences; underwater lighting in swimming pools, fountains, and baths; power supply lines and equipment installed in water; and electrical medical equipment in hospitals that come into direct contact with the human body.

[0003] The existing application number is: 202322434494.1, and the patent name is "An electromagnetic release with power-assisted tripping and resetting functions". The Chinese patent discloses that "the end of the mounting plate (1) close to / away from the leakage release (5) is provided with a leakage reset component (4) for driving the rotating plate (2) to reset, and the leakage reset component (4) includes an auxiliary block (43) provided on the first rotating part (22), a reset block (41) rotatably connected to the mounting plate (1) and a reset rod (42), wherein the reset block (41) is located on the side of the first rotating part (22) away from the opening and closing mechanism (6), and the auxiliary block (43) is located on the first rotating part (22) toward the reset block (41). ), the reset rod (42) is located on the side of the reset block (41) away from the hinge rod (32); the reset block (41) includes a push block (413) and a first tooth block (412) for driving the auxiliary block (43) to rotate toward the resistance arm (323); the reset rod (42) includes a second tooth block (422); the first tooth block (412) and the second tooth block (422) are engaged with each other, and the end of the reset rod (42) away from the reset block (41) contacts the opening and closing mechanism (6). "Transmission is achieved by the mutual engagement of the first tooth block (412) and the second tooth block (422), and the swinging between the two is prone to wear, resulting in a short service life and uneven transmission. Summary of the Invention

[0004] In view of the above problems, an object of the present invention is to provide an operating device for a leakage protection circuit breaker with high leakage tripping rate, high safety and smooth conduction.

[0005] In response to the above problems, the following technical solutions are provided: an operating device for a leakage protection circuit breaker, comprising an operating handle pivotally connected to a housing of the circuit breaker, a bracket pivotally connected to the housing and located below the operating handle, a first trip buckle pivotally connected to the bracket, a first lock buckle pivotally connected to the bracket and located on the side of the first trip buckle facing the static contact, and a first connecting rod connecting the operating handle and the first trip buckle at both ends, further comprising a transmission mechanism that cooperates with the operating handle, wherein the bracket is provided with a protrusion located on its outer side protruding toward the first lock buckle, and the protrusion is provided with a first accommodating groove 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 is provided between the first lock buckle and the protrusion, and its two ends respectively abut against the first receiving groove and the second receiving groove. A tension spring is provided under the operating handle, one end of the tension spring is connected to the housing through a pin, and the other end is hooked on the bracket. The transmission mechanism is located at the other end of the operating handle relative to the first connecting rod, and the transmission mechanism includes a reset rod, a second lock buckle coaxially arranged with the reset rod, a leakage bracket pivotally connected to the housing and located on the upper side of the reset rod, and a second lock buckle engaged with the leakage bracket and pivotally connected to the leakage bracket. The second trip buckle on the upper part, the trip rod linked to the leakage bracket, and a second connecting rod with one end connected to the second trip buckle and the other end connected to the operating handle. One end of the reset rod is against the ejector pin of the electromagnetic release, and the other end is extended toward the leakage bracket to form an abutment portion. One side of the leakage bracket is provided with a first torsion spring connected to the circuit breaker housing. One end of the second lock buckle is abutted against the lower end of the first torsion spring, and the other end is buckled with the second trip buckle. The other end of the first torsion spring is abutted against the inner wall of the housing. The reset rod is provided with a first block on the side facing the housing cover. The second lock buckle is connected to the second trip buckle. A second block is provided on the side of the shell cover at one end of the mating part, and a second torsion spring is sleeved on the second lock buckle and coaxially arranged therewith. The two ends of the second torsion spring are respectively abutted against the first block and the bottom of the second block. The second lock buckle is provided with a push block that abuts and cooperates with the outer circle of the reset rod. A third torsion spring coaxially arranged therewith is provided in the leakage bracket, and an open groove is provided at the end of the leakage bracket to abut and cooperate with the two ends of the third torsion spring. The lower end of the third torsion spring extends downward to abut and cooperate with the outside of the abutting part. A groove body for limiting the trip rod is provided on the shell below the operating handle.

[0006] In the above structure, in the closed state, when the magnetic ring senses the leakage, the 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 trip buckle and the leakage bracket are linked with the swing of the reset rod, the second lock buckle and the second trip buckle are tripped, the leakage bracket drives the second trip buckle to swing, drives the trip rod to move, and the trip rod pushes the first lock buckle to swing, the first lock buckle is tripped from the first trip buckle, and 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 trip buckle, and the second trip buckle drives the second connecting rod to reset, thereby realizing the opening of the circuit breaker of the present invention; when the circuit breaker of the present invention is closed, the operating handle is controlled to move toward the closing position. The operating handle swings in the direction of the switch, and the operating handle controls the first trip latch and the second trip latch to swing respectively 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 and the static contact abut, and the first trip latch swings through the first connecting rod to abut against the first lock latch to achieve the limit of the first lock latch 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 latch pushes the reset rod to swing through the push block to press the ejector pin of the electromagnetic trip device back into the electromagnetic trip device, thereby facilitating the leakage protection device to perform leakage protection and achieve the closing of the present invention. The leakage protection of the present invention is achieved through the electromagnetic trip device, which has high reliability, thereby improving the safety of the present invention; and the electromagnetic trip device is small in size, which can further reduce the overall size of the present invention. Positioning the first lock catch in correspondence with the short-circuit protection device facilitates the present invention's ability to release the short-circuit protection device when a short circuit occurs, allowing the short-circuit protection device's top rod to drive the first lock catch to swing, thereby separating the moving and static contacts and achieving the circuit breaker opening of the present invention, further enhancing the safety of the present invention. The provision of a tension spring increases the force exerted by the bracket to reset the moving contact during release, thereby improving the reliability and safety of the circuit breaker opening. The provision of a lock catch spring enhances the locking force between the first lock catch and the first trip catch, thereby improving the reliability of the circuit breaker closing. The provision of first and second receiving grooves enhances the stability of the lock catch spring installation, thereby improving the reliability of the operating mechanism. The provision of a spacer facilitates the installation of the present invention's internal components, thereby enhancing the ease of assembly. The provision of first and second torsion springs limits the second lock catch and increases the force exerted by the second lock catch to displace the reset lever, thereby improving the reliability of the reset lever in controlling the reset pin of the electromagnetic release. The provision of a third torsion spring limits the reset lever to prevent it from self-swinging, further enhancing the reliability and safety of the present invention. The provision of the first stop facilitates the engagement of the reset rod 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 present invention. The provision of the second stop facilitates the engagement of the second lock catch with the second torsion spring, thereby improving the reliability of the transmission mechanism.The distance between the end of the reset lever that abuts the electromagnetic release and the reset lever's pivot point is greater than the distance between the abutment portion and the reset lever's pivot point. Combined with the provision of a second torsion spring, the reset lever can be driven to swing with a relatively small force exerted by the electromagnetic release ejector, thereby improving the reliability and safety of the present invention. The present invention utilizes a lever-type transmission to achieve release, resulting in a longer service life and smoother transmission compared to existing toothed transmission methods.

[0007] The present invention is further configured such that a limiting block is provided on the side of the tripping rod facing the bracket relative to the first lock catch and abutting against the first lock catch.

[0008] In the above structure, the trip rod pushes the first lock catch of the circuit breaker operating device to swing through the limit block, and the first lock catch is released from the first tripping position, thereby separating the moving contact and the static contact, thereby realizing the opening of the circuit breaker.

[0009] The present invention 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.

[0010] 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 present invention.

[0011] The present invention 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.

[0012] 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 present invention, the overload protection device or the short circuit protection device starts to control the first lock buckle to trip, and when the opening of the present invention is realized, the first lock buckle is not limited by 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 present invention trips, if the main handle and the auxiliary handle are reset together, it can be judged that a leakage has occurred and the auxiliary handle has not been 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 present invention.

[0013] The present invention is further configured such that positioning holes are provided at the outer ends of the main handle and the auxiliary handle.

[0014] In the above structure, the positioning hole can cooperate with the positioning column on the housing, which facilitates the positioning and installation of the operating handle and can improve the stability of the swinging of the operating handle.

[0015] The present invention is further configured such that the end portion of the top end of the push handle extends toward the positioning block to above the top end thereof.

[0016] The above structure can facilitate the user to push the main handle and the auxiliary handle to close the switch by pushing the handle, thereby improving the convenience of operation of the present invention.

[0017] The present invention is further configured such that friction lines are provided on the push handle.

[0018] The above structure can further facilitate the user to operate the push handle, prevent it from slipping, and improve the reliability of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of the circuit breaker in the present invention.

[0020] Figure 2 It is a schematic diagram of the structure of the present invention in cooperation with the shell cover.

[0021] Figure 3 It is a schematic diagram of the structure of the present invention in conjunction with the housing.

[0022] Figure 4 It is a schematic diagram of the structure of the present invention located inside the shell cover.

[0023] Figure 5 This is a schematic diagram of the structure in which the transmission mechanism of the present invention is located inside the housing.

[0024] Figure 6 It is a structural schematic diagram of the transmission mechanism in the present invention.

[0025] Figure 7 It is a structural schematic diagram of some parts of the transmission mechanism in the present invention.

[0026] Figure 8 Schematic diagram of the structure of the trip rod in the present invention.

[0027] Figure 9 Schematic diagram of the structure of the reset rod in the present invention.

[0028] Figure 10 It is a structural schematic diagram of the cover plate of the circuit breaker in the present invention.

[0029] Figure 11 It is a structural schematic diagram of the circuit breaker test device and the cover plate in the present invention.

[0030] Figure 12 It is a structural schematic diagram of the operating handle in the present invention.

[0031] Figure 13 It is a schematic cross-sectional structural diagram of the operating handle in the present invention.

[0032] Meaning of the numbers in the figure: 1-housing; 2-housing 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; 91-operating handle; 92-bracket; 93-first tripping buckle; 94-first locking buckle; 95-first connecting rod; 96-transmission mechanism; 01-spacer; 011-limiting opening; 921-bump; 922-first accommodating groove; 941-second accommodating groove; 02-locking spring; 03-tension spring; 961-reset lever; 962-second locking buckle; 963-leakage protection bracket; 964-second tripping buckle; 965-tripping lever; 966-second connecting rod; 9611-abutting portion; 11-first fixing column; 111 - first torsion spring; 9612 - first stop; 9621 - second stop; 9622 - second torsion spring; 9623 - push block; 04 - third torsion spring; 9631 - opening slot; 12 - slot body; 9651 - limit block; 9624 - limit ridge; 911 - main handle; 912 - auxiliary handle; 9111 - push handle; 9112 - positioning slot; 9121 - positioning block; 14 - second fixing column ;05-cover plate;051-tube column;06-limiting 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;054-limiting groove;055-clamping groove;611-installation groove;612-yield opening;056-stop block;08-positioning hole;13-positioning column. DETAILED DESCRIPTION

[0033] The following embodiments of the present invention are described in further detail with reference to 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.

[0034] It should be noted that all directional indications (such as up, down, left, right, front, back, and rear) in the embodiments of the present invention are only used to explain the relative positional relationships and movement conditions between the various components in a specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0035] like Figures 1 to 13A leakage protection circuit breaker shown in the figure includes a housing 1, a housing 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 static 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 open or close the switch, wherein the leakage protection device 8 includes an electromagnetic trip 81 installed in the housing 1, a magnetic ring 82 located below the electromagnetic trip 81, and an electromagnetic plate 83 electrically connected to the electromagnetic trip 81 and the magnetic ring 82, and the operating device 9 includes an operating handle 91 pivotally connected to the housing 1, a bracket 92 pivotally connected to the housing 1 and located below the operating handle 91, and a first trip button 9 pivotally connected to the bracket 92. 3. A first lock catch 94 pivotally connected to the bracket 92 and located on the side of the first jump catch 93 facing the static contact 72, and a first connecting rod 95 whose two ends are respectively connected to the operating handle 91 and the first jump catch 93, further comprising a transmission mechanism 96 linked to the operating handle 91, the bracket 92 is installed in the housing 1, a spacer 01 is provided between the housing 1 and the shell cover 2, a limited position opening 011 is provided on the spacer 01 at a position corresponding to the bracket 92, a protrusion 921 located on its outer side is protruded on the bracket 92 toward the first lock catch 94, the protrusion 921 is provided with a first accommodating groove 922 toward the outer edge of the first lock catch 94, a second accommodating groove 941 corresponding to the first accommodating groove 922 is provided on the outer edge of the first lock catch 94, the A lock spring 02 is provided between the first lock catch 94 and the protrusion 921, and its two ends respectively abut 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, and the other end is hooked on the bracket 92. The transmission mechanism 96 is located at the other end of the operating handle 91 relative to the first connecting rod 95. The transmission mechanism 96 includes a reset rod 961 pivoted on the shell 1, a second lock catch 962 coaxially arranged with the reset rod 961, a leakage bracket 963 pivoted on the shell 1 and located on the upper side of the reset rod 961, and a second jump catch 963 that is engaged with the second lock catch 962 and pivoted on the leakage bracket 963. 64. A trip rod 965 linked to the leakage bracket 963 and a second connecting rod 966 connected to the operating handle 91 at one end and connected to the second trip buckle 964 at one end, and the operating handle 91 at the other end. One end of the reset rod 961 abuts against the ejector pin of the electromagnetic release 81, and the other end extends toward the leakage bracket 963 to form an abutment portion 9611. A first fixing column 11 is provided on the upper side of the reset rod 961 on the shell 1, and a first torsion spring 111 is sleeved on the first fixing column 11. One end of the second lock buckle 962 abuts against the lower end of the first torsion spring 111, and the other end is buckled with the second trip buckle 964. The other end of the first torsion spring 111 abuts against the inner wall of the shell 1, and a first abutment block 9612 is provided on the side of the reset rod 961 facing the shell cover 2.The second lock buckle 962 is provided with a second stop block 9621 on the side of the shell cover 2 at one end that cooperates with the second jump buckle 964. The second lock buckle 962 is provided with a second torsion spring 9622 coaxially arranged therewith. The two ends of the second torsion spring 9622 are respectively abutted against the first stop block 9612 and the lower part of the second stop block 9621. The second lock buckle 962 is provided with a push block 9623 that abuts against the outer circle of the reset rod 961. The leakage bracket 963 is provided with a second torsion spring 9622 coaxially arranged therewith. The third torsion spring 04 is mounted on the shaft. The end of the leakage bracket 963 has an open slot 9631 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 portion 9611. The housing 1 is provided with a slot 12 below the operating handle 91 to limit the position of the trip rod 965. The trip rod 965 is provided with a limit block 9651 on the side facing the bracket 92 opposite the first lock 94, which abuts and cooperates with it.

[0036] 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 961 to swing relative to the pivot point, and the second lock buckle 962, the second trip buckle 964 and the leakage bracket 963 are linked with the swing of the reset rod 961, and the second lock buckle 962 and the second trip buckle 964 are tripped. The leakage bracket 963 drives the second trip buckle 964 to swing, driving the trip rod 965 to move, and the trip rod 965 pushes the first lock buckle 94 to swing through the limit block 9651, and the first lock buckle 94 is tripped from the first trip buckle 93. The bracket 92 drives the moving contact 71 to move in the opposite direction relative to the static contact 72, and the operating handle 91 drives the first connecting rod 95 through the first trip buckle 93, and the second trip buckle 964 drives the second connecting rod 966 to reset, thereby realizing the opening of the circuit breaker of the present invention; when the circuit breaker of the present invention is closed, the control operating handle The handle 91 swings in the closing direction, and the operating handle 91 controls the first trip buckle 93 and the second trip buckle 964 to swing through the first connecting rod 95 and the second connecting rod 966 respectively, thereby driving the bracket 92 and the leakage bracket 963 to swing, and the bracket 92 drives the moving contact 71 to swing toward the static contact 72. When the operating handle 91 is swung to the closing position, the moving contact 71 abuts against the static contact 72, and the first trip buckle 93 swings through the first connecting rod 95 to abut against the first lock buckle 94 to achieve the limitation of the first lock buckle 94 and the bracket 92; the tripping rod 965 is displaced in the same direction relative to the closing direction of the operating handle 91 as the leakage bracket 963 swings, and the second lock buckle 962 pushes the reset rod 961 through the push block 9623 to swing 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 present invention. The leakage protection of the present invention is implemented through an electromagnetic release 81, which has high reliability, thereby improving the safety of the present invention. The electromagnetic release 81 is small in size, which can further reduce the overall size of the present invention. Arranging the first lock catch 94 in correspondence with the short-circuit protection device 3 allows the present invention to facilitate, when a short circuit occurs, driving the first lock catch 94 to swing by the top rod of the short-circuit protection device 3, thereby achieving tripping, thereby separating the moving contact 71 from the static contact 72, achieving the opening of the present invention, and further improving the safety of the present invention. By providing a tension spring 03, the force of the bracket 92 to drive the moving contact 71 to reset during tripping can be increased, thereby improving the reliability and safety of the opening of the present invention. By providing a lock spring 02, the locking force between the first lock catch 94 and the first tripping catch 93 can be increased, thereby improving the reliability of the closing of the present invention. By providing a first accommodating groove 922 and a second accommodating groove 941, the stability of the installation of the lock spring 02 can be improved, thereby improving the reliability of the operating device. The provision of the spacer block 01 facilitates the installation of the internal components of the present invention, thereby improving the convenience of assembly of the present invention. Furthermore, the installation of the static contact 72 on the spacer block 01 improves the stability of the short-circuit protection device 3.By providing a first torsion spring 111 and a second torsion spring 9622, the second lock catch 962 can be limited, and the force exerted by the second lock catch 962 to displace the reset rod 961 can be increased, thereby improving the reliability of the reset rod 961 in controlling the reset pin of the electromagnetic release 81. By providing a third torsion spring 04, the reset rod 961 can be limited, preventing the reset rod 961 from self-swinging, further improving the reliability and safety of the present invention. By providing a first stop 9612, the reset rod 961 can be easily matched with the second torsion spring 9622, thereby facilitating the electromagnetic release 81's push pin to push the reset rod 961 to swing, thereby improving the reliability of the present invention. By providing a second stop 9621, the second lock catch 962 can be easily matched with the second torsion spring 9622, thereby improving the reliability of the transmission mechanism 96. The distance from the end of the reset rod 961 that abuts the electromagnetic release 81 to the pivot point of the reset rod 961 is greater than the distance from the abutment portion 9611 to the pivot point of the reset rod 961. In combination with the arrangement of the second torsion spring 9622, the reset rod 961 can be driven to swing by a smaller force ejected by the electromagnetic release ejector, thereby improving the reliability and safety of the present invention.

[0037] In this embodiment, a protrusion at one end of the second lock buckle 962 that contacts the first torsion spring 111 is provided with a limiting ridge 9624 .

[0038] In the above structure, the first torsion spring 111 can be limited by providing the limiting ridge 9624, thereby improving the stability of the first torsion spring 111 and the reliability of the present invention.

[0039] 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 966. 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.

[0040] In the above structure, by cooperating with the positioning block 9121 and the positioning groove 9112 and by cooperating with the limit block 9651 on the reset rod 961 and the first lock buckle 94, when the leakage protection device 8 is activated, the auxiliary handle 912 can be opened and reset while driving the main handle 911 to open and reset; in the event of an overload or short circuit in the present invention, 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 opening of the present invention is realized, the first lock buckle 94 is not limited by the other side of the reset rod 961 relative to the first lock buckle 94 toward the limit block 9651, and then the main handle 911 is reset, and the auxiliary handle 912 will not be reset. Therefore, when the present invention trips, if 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 present invention.

[0041] In this embodiment, the shell 1 is provided with a second fixing column 14 for the leakage bracket 963 to be socketed, and the transmission assembly is provided with a cover plate 05 on the side facing the shell cover 2, and the cover plate 05 is provided with two pipe columns 051 adapted to the first fixing column 11 and the second fixing column 14.

[0042] In the above structure, the provision of cover plate 05 can limit the transmission mechanism 96, thereby improving the stability of the transmission mechanism 96 and enhancing the reliability of the present invention. The provision of pipe column 051 can improve the stability of the first fixing column 11 and the second fixing column 14, thereby further improving the stability of the transmission mechanism 96 structure.

[0043] In this embodiment, there are two moving contacts 71, which are pivotally connected to both sides of the bracket 92. Both 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 extends toward the cover plate 05 and is provided with 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 the button spring 62 to be sleeved and a second connecting column 053 for the contact spring 63 to be sleeved. One end of the button spring 62 abuts against the bottom of the test button 61, and when the test button 61 is pressed, it abuts against the button sheet 64. The other end is connected to one end of the contact spring 63. The other end of the contact spring 63 is located on 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.

[0044] In the above structure, a connecting wire is connected to the terminal on one side of the magnetic ring 82, and the other end of the connecting wire is connected to a test resistor electrically connected to the button piece 64. In the closed state, one end of the limit torsion spring 06 abuts against the contact spring 63. When the test button 61 is pressed, the button spring 62 abuts against the button piece 64, thereby generating leakage, the leakage protection device 8 is activated, the present invention 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. After pressing the test button 61, no circuit is generated, thereby improving the safety and reliability of the present invention. In the existing leakage protection circuit breaker, when in the open state, its moving contact 71 is still in a state of being connected to the test circuit, which is easy to be energized. When the test button 61 is pressed, the circuit breaker is easily damaged. Therefore, in the open state, the limit torsion spring 06 of the present invention does not abut against the contact spring 63, no current is carried, and no circuit is generated. Therefore, compared with the existing leakage protection circuit breaker, the present invention is safer.

[0045] In this embodiment, a partition plate 07 is provided on the cover plate 05 between the button spring 62 and the extension section 061 .

[0046] The above structure can increase the creepage distance between the two, thereby improving the reliability of the present invention.

[0047] In this embodiment, a limiting groove 054 for installing the contact spring 63 is formed on the cover plate 05 .

[0048] The above structure can facilitate the installation of the contact spring 63 and can limit the contact spring 63, thereby improving the convenience of assembly of the present invention.

[0049] 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 .

[0050] The above structure can improve the convenience of assembly of the present invention.

[0051] 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 contacts the button spring 62 is in the shape of a chamfered arc.

[0052] 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 present invention.

[0053] In this embodiment, a clearance opening 612 is formed on one side of the installation slot 611 facing the cover plate 05 , and a stop block 056 is provided on the cover plate 05 at a position corresponding to the clearance opening 612 .

[0054] 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 present invention.

[0055] In this embodiment, positioning holes 08 are formed at the outer ends of the main handle 911 and the auxiliary handle 912 .

[0056] In the above structure, the positioning hole 08 can cooperate with the positioning column 13 on the housing 1, which facilitates the positioning and installation of the operating handle 91 and can improve the stability of the swinging of the operating handle 91.

[0057] In this embodiment, the end portion of the top of the push handle 9111 extends toward and above the top of the positioning block 9121 .

[0058] The above structure can facilitate the user to push the main handle 911 and the auxiliary handle 912 through the push handle 9111 to close the switch, thereby improving the convenience of operation of the present invention.

[0059] In this embodiment, the push handle 9111 is provided with friction lines.

[0060] The above structure can further facilitate the user to operate the push handle 9111 and prevent it from slipping, thereby improving the reliability of the present invention.

[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 scope of protection of the present invention.

Claims

1. An operating device for a leakage protection circuit breaker, comprising an operating handle pivotally connected to a circuit breaker housing, a bracket pivotally connected to the housing and located below the operating handle, a first trip latch pivotally connected to the bracket, a first lock latch pivotally connected to the bracket and located on a side of the first trip latch facing a stationary contact, and a first connecting rod having two ends connecting the operating handle and the first trip latch, characterized in that: and a lock member having two ends extending along a length of the first latch and a second end extending along a length of the second latch to engage with the first latch and engage with the second latch to engage with the first or second latch. The cam is secured to the outer wall of the housing and has a locking plate, the locking plate being secured to the cam face and locking to the left of the cam face.

2. The operating device of the leakage protection circuit breaker according to claim 1, characterized in that: A limiting block is provided on the side of the tripping rod facing the bracket relative to the first lock catch and abutting against the first lock catch.

3. The operating device of 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.

4. The operating device of the 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 provided on the push handle toward the closing direction. The secondary handle is provided with a positioning block adapted to the positioning groove.

5. The operating device of the leakage protection circuit breaker according to claim 4, characterized in that: Positioning holes are formed on the outer ends of the main handle and the auxiliary handle.

6. The operating device of the leakage protection circuit breaker according to claim 5, characterized in that: The end portion of the top end of the push handle extends toward the positioning block to above the top end thereof.

7. The operating device of the leakage protection circuit breaker according to claim 6, characterized in that: The push handle is provided with friction lines.

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