CN220731435U - Circuit breaker - Google Patents

Abstract

The utility model relates to a circuit breaker, which comprises a shell, a fixed contact, a control mechanism, a push rod movably arranged in the shell, a moving contact arranged in the push rod, a reset elastic piece arranged on the periphery of the push rod, a buckling mechanism and an automatic tripping mechanism arranged on one side of the push rod, wherein the head of the moving contact protrudes out of the push rod, the push rod can drive the moving contact to contact with the fixed contact, the reset elastic piece is deformed, an outwards protruding matching part is arranged on one side of the push rod, which faces to the buckling mechanism, the buckling mechanism is used for clamping the matching part to limit the push rod during switching on, the control mechanism is electrically connected with the automatic tripping mechanism, the automatic tripping mechanism is triggered to drive the buckling mechanism to be away from the matching part, and a reset spring immediately drives the push rod to reset. The circuit breaker can ensure that the movable contact and the fixed contact can keep firm contact and the reliability of breaking capacity.

Description

Circuit breaker

Technical Field

The utility model relates to the field of circuit breakers, in particular to a circuit breaker.

Background

The circuit breaker is a switching device capable of conducting, carrying and breaking a current under normal loop conditions and conducting, carrying and breaking a current under abnormal loop conditions within a prescribed time, and can distribute electric energy and protect a power line, a motor and the like, and automatically cut off a circuit when serious overload or short circuit, undervoltage and other faults occur, so that the circuit breaker is widely applied to power electronic systems.

In the related art, the circuit breaker comprises a thermomagnetic circuit breaker, an air circuit breaker and the like, however, the mechanism of the traditional thermomagnetic circuit breaker is complex, the related parts are more, the requirements on the size and the process of the parts are higher, the required internal space is larger, faults are easy to occur, the reliability is low, the traditional air circuit breaker can generate larger electric arcs when breaking under the condition of larger short-circuit current, the guide actuation and static contact are easy to damage, the service life is short, and the application scene is limited.

Disclosure of Invention

The technical problem to be solved by the present utility model is at least one of the problems mentioned in the background art, and a circuit breaker is provided.

The technical scheme adopted for solving the technical problems is as follows: the circuit breaker comprises a shell, a fixed contact and a control mechanism which are fixedly arranged in the shell, a push rod which is movably arranged in the shell, a moving contact which is arranged in the push rod, a reset elastic piece which is arranged on the periphery of the push rod, a buckle mechanism and an automatic tripping mechanism which are arranged on one side of the push rod,

the shell is provided with an inserting side, the moving contact and the buckling mechanism are arranged between the inserting side and the fixed contact,

the head part of the moving contact protrudes out of the pushing rod, the pushing rod penetrates through the insertion side, the pushing rod can drive the moving contact to move towards the direction close to the fixed contact so as to contact the moving contact with the fixed contact, the reset elastic piece is deformed,

the push rod is provided with a matching part protruding outwards at one side facing the buckling mechanism, the buckling mechanism is used for clamping the matching part to limit the push rod during closing,

the control mechanism is electrically connected with the automatic tripping mechanism and triggers the automatic tripping mechanism to drive the buckle mechanism to be far away from the matching part, and the reset elastic piece is used for driving the push rod to reset.

In some embodiments, the circuit breaker further comprises a manual trip mechanism,

the manual tripping mechanism comprises a rotating piece rotatably arranged in the shell, a second elastic piece arranged at the periphery of the rotating piece and a tripping button penetrating through the inserting side,

the rotating piece is provided with a pressing part extending to the buckling mechanism and a pulling part matched with the second elastic piece,

the trip button can be displaced towards the direction of the rotating piece by external force, so as to drive the pressing part and the pulling part to rotate, further drive the buckle mechanism to be far away from the matching part and make the second elastic piece deform,

the second elastic piece drives the tripping button and the rotating piece to reset when the shape is restored.

In some embodiments, the buckle mechanism comprises an elongated ejector rod and a first elastic piece arranged at one end of the ejector rod away from the matching part,

the ejector rod is used for abutting against the matching part during closing, the ejector rod can be forced to displace away from the matching part, the first elastic piece is compressed, and the first elastic piece is used for driving the ejector rod to reset.

In some embodiments, an inclined wall is arranged on one side of the matching part, facing the fixed contact, the push rod passes over the push rod by means of the inclined wall during the displacement of the push rod in the direction of the fixed contact, and a blocking wall is arranged on one side of the matching part, facing away from the fixed contact, and the push rod is limited by abutting against the blocking wall after passing over the push rod.

In some embodiments, the automatic trip mechanism includes a bracket, a stationary core positioned in the bracket and a movable core, the stationary core being positioned closer to the mating portion than the movable core,

the ejector rod is inserted into the bracket, one end of the ejector rod, which is close to the matching part, protrudes out of the bracket,

the fixed iron core is fixed on the ejector rod, the control mechanism is electrically connected with the fixed iron core, and the movable iron core and the ejector rod are driven to move towards the direction of the fixed iron core by electrifying the fixed iron core.

In some embodiments, the displacement of the push rod in the closing process is greater than the opening distance between the moving contact and the fixed contact.

In some embodiments, the circuit breaker further includes a contact spring for providing contact pressure, the contact spring being mounted inside the push rod at a side of the moving contact away from the stationary contact.

In some embodiments, the push rod is provided with a containing cavity for containing the movable contact and the elastic piece for the contact,

the movable contact is movably arranged in the accommodating cavity and comprises a movable contact main body positioned in the accommodating cavity,

a first distance is arranged between the side surface of the head part of the movable contact main body and the inner side wall of the accommodating cavity adjacent to the fixed contact in the opening state,

the first distance is minimum in a closing state, or the side face of the head of the moving contact body is attached to the inner side wall of the accommodating cavity, which is adjacent to the fixed contact.

In some embodiments, the insertion side is provided with a second receptacle into which the power supply line is inserted,

the circuit breaker further comprises a conductive component, one side of the conductive component is located at the periphery of the second jack, and the other side of the conductive component is mechanically and electrically connected with the moving contact.

In some embodiments, the circuit breaker further comprises a load contact disposed in the housing and electrically connected to the static contact, wherein the load contact and the moving contact are respectively located at two sides of the static contact along the length direction of the circuit breaker.

The implementation of the utility model has the following beneficial effects: the circuit breaker disclosed by the utility model can be used for enabling the movable contact to be in contact with the fixed contact by manually pushing the push rod when the circuit breaker is required to be switched on, and enabling the push rod to be clamped at the position of the push rod through the clamping mechanism, so that switching on is completed, and after switching on, the movable contact and the fixed contact can be kept firmly in contact due to the clamping of the push rod at the position of the clamping mechanism, and when switching off is required, the automatic tripping mechanism drives the clamping mechanism to trip, so that the push rod is quickly reset under the action of the reset elastic piece, and the reliability of breaking capacity is ensured.

Drawings

The utility model will be further described with reference to the accompanying drawings and examples, in which:

fig. 1 is a schematic view illustrating an internal structure of a circuit breaker in a breaking state with a part of a case omitted in some embodiments of the present utility model;

fig. 2 is a schematic view of a circuit breaker in some embodiments of the utility model with most of the structure omitted in the insertion side direction;

fig. 3 is an exploded view of a closing mechanism in some embodiments of the circuit breaker of the present utility model;

fig. 4 is a schematic view of an internal structure of the circuit breaker according to some embodiments of the present utility model at a moment when the mating portion just contacts the jack;

FIG. 5 is a longitudinal cross-sectional view of a latch mechanism and an automatic release mechanism according to some embodiments of the present utility model;

FIG. 6 is a schematic illustration of the structure between a rotating member, a second resilient member and a portion of a housing in some embodiments of the utility model;

fig. 7 is a schematic view of an internal structure of a circuit breaker according to some embodiments of the present utility model at a moment when a moving contact and a stationary contact are just contacted;

fig. 8 is a schematic view illustrating an internal structure of a circuit breaker in a closed state according to some embodiments of the present utility model;

FIG. 9 is a schematic diagram of the internal structure of an interrupt circuit breaker with the aid of a manual trip mechanism according to some embodiments of the present utility model;

fig. 10 is a longitudinal structural cross-sectional view of an automatic trip mechanism in cooperation with a snap mechanism to complete a trip in some embodiments of the present utility model.

Reference numerals:

a circuit breaker 100; a housing 1; a first shell portion 11; a positioning mounting groove 111; a limit projection 112; an insertion side 12; a first jack 121; a second jack 122; a third jack 123; a closing mechanism 2; a push lever 21; a rod body 211; a first chamber 2111; a second chamber 2112; a rail groove 2113; an extension 212; a fitting portion 213; a sloped wall 2131; a barrier 2132; a hand-held portion 214; a compression spring portion 215; a contact elastic member 22; a return elastic member 23; a moving contact 24; a moving contact body 241; a movable contact 242; a sleeve portion 243; a first distance 25; a stationary contact 3; a stationary contact main body 31; a stationary contact 32; a load contact 4; a buckle mechanism 5; a jack 51; a first elastic member 52; an annular portion 53; a manual trip mechanism 6; a rotating member 61; a rotating body 611; a pressing portion 612; a force receiving portion 613; a tension portion 614; trip button 62; a second elastic member 63; an automatic trip mechanism 7; a bracket 71; a fixed iron core 72; a movable iron core 73; a feedback module 81; a trigger switch 811; a conductive member 9; a height direction H and a length direction L; width direction W.

Detailed Description

For a clearer understanding of technical features, objects and effects of the present utility model, a detailed description of embodiments of the present utility model will be made with reference to the accompanying drawings. In the following description, it should be understood that the directions or positional relationships indicated by "front", "rear", "upper", "lower", "left", "right", "longitudinal", "transverse", "vertical", "horizontal", "top", "bottom", "inner", "outer", "head", "tail", etc. are configured and operated in specific directions based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present utility model, and do not indicate that the apparatus or element to be referred to must have specific directions, and thus should not be construed as limiting the present utility model.

It should also be noted that unless explicitly stated or limited otherwise, terms such as "mounted," "connected," "secured," "disposed," and the like are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. When an element is referred to as being "on" or "under" another element, it can be "directly" or "indirectly" on the other element or one or more intervening elements may also be present. The terms "first," "second," "third," and the like are used merely for convenience in describing the present utility model and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated, whereby features defining "first," "second," "third," etc. may explicitly or implicitly include one or more such features. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

In the following description, for purposes of explanation and not limitation, specific details are set forth such as the particular system architecture, techniques, etc., in order to provide a thorough understanding of the embodiments of the present utility model. It will be apparent, however, to one skilled in the art that the present utility model may be practiced in other embodiments that depart from these specific details. In other instances, detailed descriptions of well-known systems, devices, circuits, and methods are omitted so as not to obscure the description of the present utility model with unnecessary detail.

The utility model constructs the circuit breaker 100, the circuit breaker 100 can ensure the reliability of contact between the movable contact and the static contact, and effectively avoid the energy generated when the movable contact and the static contact are connected and disconnected on the premise of reliable contact, thereby prolonging the service life.

In some embodiments, the circuit breaker 100 may have a relatively flat, elongated, square configuration, although the shape of the circuit breaker 100 may be other shapes, which are not particularly limited.

For convenience of explanation, referring to the arrow indications shown in fig. 1 and 2, the arrow indications include a height direction H, a length direction L and a width direction W of the circuit breaker 100, and hereinafter, the height direction H of the circuit breaker 100 is taken as a longitudinal reference direction, and the length direction L of the circuit breaker 100 is taken as a transverse reference direction.

Referring to fig. 1, the circuit breaker 100 may include, in some embodiments, a housing 1, a closing mechanism 2, a stationary contact 3, a load contact 4, a buckle mechanism 5, a manual trip mechanism 6, an automatic trip mechanism 7, and a control mechanism.

Wherein, shell 1 is used for providing installation basis and protection for inner structure, and closing mechanism 2, stationary contact 3, load contact 4 transversely install in proper order in shell 1, and wherein closing mechanism 2 and stationary contact 3 can be located same height, and buckle mechanism 5, manual tripping device 6 and automatic tripping device 7 also install in shell 1, all can be located closing mechanism 2's below. The fixed contact 3 and the load contact 4 are fixed in the shell 1, the fixed contact 3 and the load contact 4 are connected in a conductive way, at least part of the structure of the switching-on mechanism 2 can transversely reciprocate in the shell 1 and can be contacted with and separated from the fixed contact 3 according to the displacement direction, and the switching-on mechanism 2 can be restored to the switching-off position when the switching-on mechanism is not subjected to external force and limitation. The buckling mechanism 5 can lock the closing mechanism 2 when the closing mechanism 2 is in full contact with the fixed contact 3, and limit the movement of the closing mechanism 2, so that the reliability of continuous contact between the closing mechanism 2 and the fixed contact 3 is ensured. The manual trip mechanism 6 and the automatic trip mechanism 7 are used for releasing the limiting action of the buckle mechanism 5 on the brake mechanism 2, and the difference is that the manual trip mechanism 6 depends on manual driving, and the automatic trip mechanism 7 can be triggered automatically or manually. A control mechanism may be mounted in the housing 1 between the stationary contact 3 and the load contact 4, the control mechanism providing a basis for the start-up operation of the automatic trip mechanism 7.

It should be noted that, in order to facilitate the display of the internal structure of the circuit breaker 100, fig. 1 omits at least a part of the structure of the casing 1. The manual tripping mechanism 6 and the automatic tripping mechanism 7 may be either one or both according to actual needs, and two tripping mechanisms are not necessarily provided. The manual tripping mechanism 6 adopts a mechanical linkage mode, so that the reliability is higher, and the automatic tripping mechanism 7 adopts a circuit control mode, so that the automatic design is realized, and the first time tripping can be realized when the circuit condition is in a problem.

When the circuit breaker 100 is put into use, one end of an electric wire for accessing a power supply can be inserted into the shell 1 and electrically connected with the closing mechanism 2, a load can be mechanically connected with the load contact 4 and electrically connected with the load contact, the closing mechanism 2 can be manually pushed to move towards the inside of the shell 1, the closing mechanism 2 is enabled to be contacted with the fixed contact 3 to complete closing action, the load and the power supply can be connected, the fastening mechanism 5 can be released under the action of the manual tripping mechanism 6 or the automatic tripping mechanism 7, and the closing mechanism 2 can be separated from the fixed contact 3, so that the connection between the load and the power supply is disconnected. The following describes in detail the construction of the various components of the housing 1, the closing mechanism 2, the stationary contact 3, the load contact 4, the buckle mechanism 5, the manual trip mechanism 6, the automatic trip mechanism 7, and the control mechanism in some embodiments of the present utility model.

Referring to fig. 1, the housing 1 is in some embodiments a rectangular box structure, which may include a first housing part 11 and a second housing part (not shown) that are detachable and combined, where the inner side of the first housing part 11 may be provided with a plurality of mounting slots, defining a plurality of mounting spaces for mounting thereon the closing mechanism 2, the fixed contact 3, the load contact 4, the fastening mechanism 5, the manual trip mechanism 6, the automatic trip mechanism 7, and the like, and the second housing part may cover the inner side of the first housing part 11 and combine to form a relatively closed structure. Of course, the inner sides of the first shell 11 and the second shell may be respectively provided with mirror symmetry mounting grooves, so as to cooperatively define a mounting space.

The first housing portion 11 is provided with a positioning mounting groove 111 located on the periphery of the closing mechanism 2 for engaging with the closing mechanism 2, and a positioning projection 112 located on the periphery of the locking mechanism 5 for engaging with the locking mechanism 5.

It should be noted that, referring to fig. 2, the housing 1 has an insertion side 12, the insertion side 12 may be a lateral side of the first shell 11, a wall surface of the insertion side 12 is provided with a first jack 121 and a second jack 122, the first jack 121 is used for allowing a part of a closing structure to leak out of the housing 1, so as to provide a foundation for manually operating the closing structure, and the second jack 122 is used for inserting a power supply line.

Referring back to fig. 1, the control mechanism may include a control circuit module (not shown) and a feedback module 81, where the control circuit module and the feedback module 81 are interposed between the fixed contact 3 and the load contact 4, and the feedback module 81 may be disposed around the fixed contact 3 and provided with a trigger switch 811 for cooperation with the closing mechanism 2. It should be noted that, the control circuit module may control the automatic trip mechanism 7 to operate under a preset working condition, and the feedback module 81 may send a closing signal or a separating signal to the control circuit module during closing or separating. The preset working conditions may be the conditions of triggering a brake release switch, preset time, circuit failure and the like, and as to the working principle and specific construction of the trigger release switch and the preset time, and how the control circuit module controls the automatic release mechanism 7 to work, reference may be made to the prior art, and no description will be given here.

With continued reference to fig. 1, the closing mechanism 2 may include, in some embodiments, a push rod 21, a moving contact 24, a contact spring 22, and a return spring 23.

As shown in fig. 1, the push rod 21 may be elongated, and is mounted below the mounting groove 111 for limiting, and the length direction of the push rod 21 is parallel to the transverse direction, and may be reciprocally displaced in the housing 1, where the push rod 21 is used to provide a mounting and moving basis for the moving contact 24, and is used to cooperatively deform the elastic member 22 for the contact and the elastic member 23 for resetting. The movable contact 24 is embedded inside the push rod 21, and can move along with the push rod 21, so as to contact and separate from the fixed contact 3. The elastic piece 22 for the contact is also embedded in the push rod 21 and is positioned at one side of the moving contact 24 away from the fixed contact 3, and the elastic piece is deformed under the action of the inner part of the push rod 21 and the moving contact 24 in the process that the moving contact 24 and the fixed contact 3 start to contact and complete closing, so that the contact pressure of the moving contact 24 tightly abuts against the fixed contact 3 is provided. The reset elastic piece 23 is arranged in the limit mounting groove 111 and is positioned above the push rod 21, when the movable contact 24 moves towards the direction of the fixed contact 3, the reset elastic piece 23 can be stressed to deform so as to provide power for restoring the push rod 21 and the movable contact 24 to the opening position during opening, and the opening position can be understood as the position of the component in the opening state.

It can be understood that the elastic member 22 for the contact is not an essential component for the switching mechanism 2 to realize switching on/off, and the elastic member 22 for the contact is used as a preferred scheme, so that the contact pressure of the moving contact 24 against the fixed contact 3 can be provided after switching on, reliable contact between the moving contact 24 and the fixed contact 3 is ensured, and appropriate buffer force is provided when the moving contact 24 just contacts the fixed contact 3, so that the moving contact 24 can be prevented from impacting the fixed contact 3 too strongly, and abrasion between the moving contact 24 and the fixed contact 3 can be effectively reduced.

The displacement of the push rod 21 during closing is larger than the opening distance between the movable contact 24 and the fixed contact 3, the movable contact 24 is over-travel, and the problem of poor contact of the movable contact 24 or the fixed contact 3 due to abrasion is avoided. Referring to fig. 2, the circuit breaker 100 may further include a conductive assembly 9 fixed in the housing 1, wherein one side of the conductive assembly 9 may be located at the periphery of the second jack 122 for electrically connecting with the electric wire when the electric wire is inserted into the second jack 122, and the other side thereof may be located at the periphery of the moving contact 24 of the closing mechanism 2 and mechanically and electrically connected with the moving contact 24.

Referring to fig. 3, the pushing rod 21 may include a rod body 211, an extension portion 212 disposed above a head of the rod body 211, a mating portion 213 disposed below the head of the rod body 211, a holding portion 214 disposed at a tail of the rod body 211, and a compression spring portion 215 disposed above the rod body 211 in some embodiments.

As shown in fig. 1 and 3, the rod 211 may have a rectangular structure, at least a majority of which is located inside the housing 1, and defines a receiving cavity therein, which includes a first chamber 2111 for receiving the moving contact 24 and a second chamber 2112 for receiving the elastic member 22 for the contact, and the second chamber 2112 is located on a lateral side of the first chamber 2111 away from the fixed contact 3. One side of the first chamber 2111 and the second chamber 2112 in the width direction W has no chamber wall, and it is understood that the rod body 211 is provided with an opening at one side in the width direction W at the position of the first chamber 2111 and the second chamber 2112 for facilitating insertion of the moving contact 24 and the contact elastic member 22, and that the rod body 211 is provided with a guide groove 2113 at the position of the first chamber 2111 at the inner side of the other side in the width direction W for restricting the track of movement of the moving contact 24 to avoid deviation. Alternatively, one end of the guide groove 2113 is located opposite to the head of the rod body 211, and may be flush with the inner sidewall of the first chamber 2111 adjacent to the stationary contact 3 in the lateral direction, and the other end thereof extends to the second chamber 2112, so that a part of the structure of the movable contact 24 may be located in the second chamber 2112. Next, a through hole communicating with the first chamber 2111 is formed in a wall surface of the rod body 211 facing the stationary contact 3 for the partial structure of the movable contact 24 to protrude.

The extension 212 may be elongated, and includes two ends, one end fixed to the head of the rod 211, for example, on the top surface of the head, and the other end extending toward the feedback module 81 and being at the same height as the feedback module 81. The extension 212 moves along the rod 211 and can contact with or separate from the trigger switch 811 of the feedback module 81, so as to trigger the feedback module 81 to send a closing signal or an opening signal.

Referring to fig. 4, the engaging portion 213 may be disposed on a bottom surface of the head of the lever body 211, and an inclined wall 2131 is disposed on a side facing the fixed contact 3, the inclined direction of the inclined wall 2131 may be from bottom to top, and the engaging portion 213 is further provided with a vertical blocking wall 2132 on a side facing away from the fixed contact 3. Alternatively, the fitting portion 213 may be a block-shaped structure having a rectangular trapezoid shape in longitudinal section. Rod body 211 can easily pass over catch mechanism 5 by means of sloped wall 2131 and, after passing over catch mechanism 5, catch the position of rod body 211 by means of catch wall 2132.

Referring back to fig. 1 and 3, a hand-holding portion 214 may be disposed at the tail portion of the rod 211, such as at the end surface of the tail portion of the rod 211, and located outside the housing 1 for being grasped by a user to push the rod 21. Preferably, the grip 214 may have a longitudinal cross-sectional area greater than that of the rod body 211.

The compression spring portion 215 may be disposed on the top surface of the rod body 211 and located in the mounting groove 111 for limiting, and may move along with the rod body 211 and cooperate with the groove wall of the mounting groove 111 for limiting.

With continued reference to fig. 1 and 3, the movable contact 24 may have a plate-like structure in some embodiments, and is installed in the first chamber 2111, and includes a movable contact body 241, a contact portion located on a side of the movable contact body 241 facing the fixed contact 3, and a sleeve portion 243 located on a side of the movable contact body 241 facing away from the fixed contact 3. The contact part at least partially penetrates through the through hole communicated with the first chamber 2111 and protrudes out of the rod body 211, and the top end of the contact part is provided with a movable contact 242 for contacting with the fixed contact 3. The sleeve portion 243 is used for the elastic member 22 for the contact to be sleeved on, and the sleeve portion 243 can be fixed on the side surface of the tail portion of the moving contact body 241. It should be noted that the length of the moving contact body 241 is smaller than the length of the guide rail groove 2113, and the specific effect can be explained with reference to the following working process.

The contact elastic member 22 may be installed in the second chamber 2112 and sleeved on the sleeve portion 243 of the moving contact 24, which may be deformed under the cooperation of the cavity wall of the second chamber 2112 and the moving contact body 241. Alternatively, the contact elastic member 22 may be a cylindrical coil spring.

The return elastic member 23 is attachable to the positioning attachment groove 111, and interposed between the compression spring portion 215 and the groove wall of the positioning attachment groove 111, and is deformable by the engagement of the compression spring portion 215 and the groove wall of the positioning attachment groove 111. Alternatively, the return elastic member 23 may be a cylindrical coil spring.

Referring to fig. 1, the stationary contact 3 may include a plate-shaped stationary contact body 31 and a stationary contact 32 fixed on a side of the stationary contact body 31 facing the closing mechanism 2 in some embodiments. Alternatively, the stationary contact body 31 may be vertically fixed in the housing 1 with its plane lying parallel to the longitudinal direction.

As shown in fig. 1, the load contact 4 may in some embodiments be of U-shaped configuration with its opening towards the outside of the housing 1, and a conductive member, which may be a copper bar connection pad, may be inserted into the opening of the load contact 4, which may be conductively connected to the load. Alternatively, as shown in fig. 1, when the two ends of the load contact 4 extend to the same side, they may be first close to each other and then separated from each other, so as to reduce the size of the opening of the load contact 4, which is beneficial to fixing the conductive member.

The load contact 4 may include two load contacts 4, which may be arranged at a longitudinal interval, one of them being used for connection between positive electrodes, the load contact 4 being electrically connected to the stationary contact 3 by a conductive member such as a wire, the other load contact 4 being used for connection between negative electrodes, and correspondingly, the insertion side 12 being further provided with a third insertion hole 123, the other load contact 4 being electrically connected to a wire inserted into the third insertion hole 123 by a conductive member such as a wire, the wire inserted into the third insertion hole 123 being used for connection to a negative electrode of a power source.

Referring to fig. 4 and 5, the latch mechanism 5 may include an elongated push rod 51 and a first elastic member 52 connected below the push rod 51 in some embodiments. The top end of the push rod 51 is higher than the bottom of the matching part 213 of the push rod 21 in the longitudinal direction in the opening state, and an annular part 53 for matching with the manual tripping mechanism 6 is sleeved on the circumference of the push rod 51, wherein the push rod 51 can sink downwards by the first elastic piece 52 when being subjected to downward pressure, and the height of the push rod 51 is reduced. The top end of the ejector rod 51 has an inclined surface, the inclined direction can be matched with the inclined wall 2131, the matching part 213 is beneficial to passing over the ejector rod 51, and optionally, the longitudinal section of the top end of the ejector rod 51 is preferably in a truncated cone shape. The first elastic member 52 is compressed when the jack 51 sinks, and can drive the jack 51 to reset when no external force is applied, and the reset can be understood as restoring to the opening position. Alternatively, the first elastic member 52 may be a cylindrical coil spring.

Referring to fig. 4 and 6, the manual trip mechanism 6 may include a trip button 62, a rotating member 61, and a second elastic member 63 in some embodiments. Wherein the trip button 62, the rotating member 61 and the second elastic member 63 are located at the same height, the rotating member 61 is rotatably installed in the housing 1, the rotating member 61 is driven to rotate by pushing the trip button 62 to the rotating member 61, the push rod 51 is pressed down in a clockwise direction, the second elastic member 63 accumulates elastic potential energy in the rotating process of the rotating member 61, releases elastic potential energy when no external force exists, drives the rotating member 61 to rotate reversely to reset, and simultaneously pushes the trip button 62 back to the original position when the rotating member 61 rotates reversely.

In some embodiments, as shown in fig. 4, the trip button 62 is movably disposed on the wall surface of the insertion side 12, the tail portion of the trip button 62 protrudes from the wall surface of the insertion side 12, and by pressing the trip button 62 to laterally displace it into the housing 1, the head portion of the trip button 62 can abut against the rotating member 61 and push the rotating member 61 to rotate.

As shown in fig. 4 and 6, the rotating member 61 may include a rotating body 611, a pressing portion 612, a force receiving portion 613, and a pulling portion 614. The rotating body 611 is rotatably mounted on the first casing 11, for example, the rotating body 611 is sleeved on a rotating shaft fixed in the first casing 11, and the rotating body 611 can rotate around the rotating shaft, and it can be understood that the shaft position of the rotating body 611 is relatively located below the trip button 62. The pressing portion 612 is connected to the side of the rotating body 611, which is close to the fastening mechanism 5, and is used for driving the ejector rod 51 to sink, where the pressing portion 612 may have a U-shaped structure and is lapped on the annular portion 53 of the ejector rod 51. The force receiving portion 613 is connected to a side of the rotating body 611 facing the trip button 62, for contact with the trip button 62. The pull portion 614 is connected to the side of the force receiving portion 613 facing the second elastic member 63, and is interposed between the force receiving portion 613 and the first housing in the width direction W, and is configured to act on the second elastic member 63 to deform the second elastic member when the rotating body 611 rotates, and since the limiting protrusion 112 is located on the side of the pull portion 614 facing away from the rotating body 611, it can restrict the rotation angle of the entire rotating member 61, so as to avoid excessive rotation.

As shown in fig. 6, the second elastic member 63 may be installed at a position between the rotating body 611 and the first housing, and the second elastic member 63 may be a torsion spring, one end of which may be fixedly connected with the tension portion 614 of the rotating body 611, may be disposed on a displacement path of the tension portion 614, and the other end may be located below the tension portion 614 and fixed on the housing 1.

Referring back to fig. 5, in some embodiments, the automatic trip mechanism 7 may include a bracket 71, a fixed iron core 72 located in the bracket 71, and a movable iron core 73, where the fixed iron core 72 and the movable iron core 73 are arranged at intervals in a longitudinal direction, the movable iron core 73 is located above the fixed iron core 72, and the fixed iron core 72 is electrically connected to a control circuit module of the control mechanism, and the control circuit module may energize the fixed iron core 72 under a preset working condition to make the fixed iron core 72 generate magnetism. When assembled, the ejector rod 51 can be vertically arranged in the bracket 71, the movable iron core 73 is fixed on the ejector rod 51, the first elastic piece 52 is arranged between the movable iron core 73 and the fixed iron core 72, and when the fixed iron core 72 generates magnetism, the movable iron core 73 and the ejector rod 51 can be driven to longitudinally move downwards. Therefore, the buckle mechanism 5 and the automatic tripping mechanism 7 can be combined into a whole, so that the structure is simplified, and parts at key positions are saved.

The following, in conjunction with fig. 1, 4, 7-10, collectively illustrate the specific workflow of the circuit breaker 100 of the present utility model in some embodiments:

referring to fig. 1, the position, state and connection relationship of the internal structure of the circuit breaker 100 in the open state are shown. It can be seen that, during opening, the push rod 21 and the moving contact 24 are biased toward the insertion side 12 and have a larger distance from the fixed contact 3, and the extension 212 of the push rod 21 is also spaced from the trigger switch 811 of the feedback module 81, and it is particularly noted that a first distance 25 exists between the side surface of the head of the moving contact body 241 and the inner side wall of the first chamber 2111 adjacent to the fixed contact 3; the contact elastic member 22 and the return elastic member 23 are in a minimum deformation state (the minimum deformation state is understood to be a state in which the deformation amount is minimum in the process of opening and closing the gate, and the deformation amount may be zero).

In connection with the open state of fig. 4, the highest point of the ejector pin 51 is higher than the lowest point of the mating part 213 in the longitudinal direction, and the first elastic member 52 is in the minimum deformation state; the trip button 62 is also biased toward the insertion side 12 and has a distance from the force receiving portion 613 of the rotating member 61, however, the trip button 62 may abut against the force receiving portion 613 of the rotating member 61 as long as the force receiving portion 613 is not biased; as shown in fig. 6, the pulling portion 614 of the rotating member 61 abuts against the stopper protrusion 112, and the second elastic member 63 is in the minimum deformed state, and the pressing portion 612 of the rotating member 61 is located above the annular portion 53 of the jack 51, but does not apply a force to the annular portion 53.

Referring to fig. 4, the position, state and connection relationship of the internal structure of the circuit breaker 100 at the moment when the push rod 21 just touches the push rod 51 during closing are shown. It can be seen that when the switch is to be closed, the push rod 21 can be pushed into the housing 1, and the push rod 21 can be linearly displaced toward the stationary contact 3. During the closing process, the distance between the compression spring portion 215 of the push rod 21 and the corresponding groove wall of the mounting groove 111 for limiting is gradually reduced, the reset elastic member 23 is gradually compressed, and since the top end of the push rod 51 is longitudinally higher than the bottom surface of the mating portion 213, the push rod 21 will touch the push rod 51 during the closing process.

Referring to fig. 7, the position, state and connection relationship of the internal structure of the circuit breaker 100 are shown at the time when the push lever 21 presses down the push lever 51 during closing. It can be seen that when the push rod 21 touches the push rod 51 and continues to linearly displace toward the fixed contact 3, the inclined wall 2131 of the mating portion 213 of the push rod 21 acts on the top end of the push rod 51, so as to press the push rod 51 downward, and the push rod 21 is allowed to pass over the push rod 51. Note that, when the engaging portion 213 applies downward pressure to the jack 51, the movable contact 242 of the movable contact 24 may contact the stationary contact 32 of the stationary contact 3, and it should be noted that closing is not completed yet, and this contact may be understood as that the movable contact 242 is in contact with the surface of the stationary contact 32, but the movable contact 24 is not yet subjected to a reaction force from the stationary contact 32.

Referring to fig. 8, the position, state and connection relationship of the internal structure of the circuit breaker 100 in the closed state are shown. It can be seen that, after the movable contact 242 contacts the stationary contact 32, the push rod 21 still needs to be linearly displaced toward the stationary contact 3 until the mating portion 213 completely passes over the ejector rod 51, and then closing can be completed. In this process, the contact elastic member 22 starts to be compressed and provides a pushing force for moving the movable contact 24 to the right in the drawing, that is, the movable contact 24 provides a contact pressure while the relative positions of the movable contact 24 and the push rod 21 are changed because the length of the movable contact body 241 is smaller than the length of the guide rail groove 2113 (refer to fig. 3), the movable contact body 241 is displaced to the right in the drawing with respect to the push rod 21 by the pushing of the contact elastic member 22, the first distance 25 becomes small, and the movable contact 24 is pressed against the fixed contact 3, improving the reliability of contact.

After the matching portion 213 completely passes over the ejector rod 51, the ejector rod 51 is restored to the original height under the action of the first elastic member 52 (refer to fig. 10) because the ejector rod 51 is not subjected to the downward pressure, the ejector rod 51 with the original height can abut against the blocking wall 2132 of the matching portion 213 to clamp the push rod 21, so that the push rod 21 is kept at the current position, the contact reliability of the moving contact 24 and the fixed contact 3 is ensured, meanwhile, the extension portion 212 of the push rod 21 abuts against and triggers the trigger switch 811, and the feedback module 81 sends a closing signal to the control circuit module, so that closing is completed. After closing, the contact elastic piece 22 and the reset elastic piece 23 are in the maximum deformation state, and the deformation amount reaches the maximum; the first distance 25 is minimized, which may be zero, i.e., the head side of the moving contact body 241 is attached to the inner sidewall of the first chamber 2111 adjacent to the stationary contact 3.

Referring to fig. 9, the position, state and connection relationship of the internal structure of the circuit breaker 100 when switching back to the open state using the manual trip mechanism 6 is shown. It can be seen that, when the switch-back switch-off state is required, the trip button 62 can be pushed to the inside of the casing 1, so that the push rod 21 is linearly displaced toward the direction of the rotating member 61, and then the trip button 62 abuts against the force receiving portion 613 of the rotating member 61 and drives the whole rotating member 61 to rotate clockwise (it can be understood that the rotating direction is only for the embodiment shown in the drawings, and the specific rotating direction can be determined according to the actual requirement), the pressing portion 612 abuts against the annular portion 53 of the ejector rod 51, so as to press down the whole ejector rod 51, and meanwhile, referring to fig. 6, the pulling portion 614 of the rotating member 61 also acts on the second elastic member 63, so as to deform the second elastic member 63. As the ejector rod 51 moves down, the push rod 21 returns to the opening position under the action of the reset elastic member 23, the moving contact 24 also returns to the opening position under the action of the contact elastic member 22, and the first distance 25 returns to the original size, so that the tripping and opening actions are completed. When the extension 212 of the push rod 21 leaves the trigger switch 811 of the feedback module 81, the feedback module 81 may also be triggered to send a switching-off signal to the control circuit module.

Then, the trip button 62 is released, the rotating member 61 rotates in the opposite direction, i.e. counterclockwise, under the action of the second elastic member 63 until the rotating member returns to the original position, and in this process, the rotating member 61 pushes the trip button 62 outwards, so that the trip button returns to the original position; the ejector rod 51 is also lifted up by the first elastic member 52 to return to the opening position.

Referring to fig. 10, the position, state and connection relationship of the inside of the buckle mechanism 5 and the automatic trip mechanism 7 when the automatic trip mechanism 7 is switched back to the off-state are shown. It can be seen that the control circuit module can energize the fixed iron core 72 at the moment of opening the switch, so that the fixed iron core 72 generates magnetism, the movable iron core 73 is attracted to the fixed iron core 72 to drive the push rod 51 to move longitudinally downwards, and the push rod 21 is restored to the switch-off position under the action of the reset elastic member 23 (refer to fig. 9), so as to complete the tripping and switch-off actions.

Subsequently, the control circuit module turns off the energization to the fixed iron core 72, the fixed iron core 72 loses magnetism, and the movable iron core 73 and the ejector rod 51 are lifted up by the first elastic member 52 to return to the opening position.

In summary, the circuit breaker 100 of the present utility model can be loaded with energy generated by switching on and off by the push rod 21, the manual tripping mechanism 6 or the automatic tripping mechanism 7, and the solid-state switching structures of the buckle mechanism 5, without loading energy generated by switching on and off by the moving and static contacts, thereby ensuring reliable contact and breaking between the moving and static contacts and effectively avoiding abrasion between the moving and static contacts.

It is to be understood that the above examples only represent preferred embodiments of the present utility model, which are described in more detail and are not to be construed as limiting the scope of the utility model; it should be noted that, for a person skilled in the art, the above technical features can be freely combined, and several variations and modifications can be made without departing from the scope of the utility model; therefore, all changes and modifications that come within the meaning and range of equivalency of the claims are to be embraced within their scope.

Claims (10)

1. The circuit breaker comprises a shell (1), a fixed contact (3) fixedly arranged in the shell (1) and a control mechanism, and is characterized by further comprising a push rod (21) movably arranged in the shell (1), a moving contact (24) arranged in the push rod (21), a reset elastic piece (23) arranged on the periphery of the push rod (21), a buckling mechanism (5) and an automatic tripping mechanism (7) which are arranged on one side of the push rod (21),

the housing (1) has an insertion side (12), the moving contact (24) and the catch mechanism (5) being arranged between the insertion side (12) and the stationary contact (3),

the head of the moving contact (24) protrudes out of the pushing rod (21), the pushing rod (21) is arranged on the insertion side (12) in a penetrating way, the pushing rod (21) can drive the moving contact (24) to move towards the direction close to the fixed contact (3) so as to contact the moving contact (24) with the fixed contact (3) and deform the reset elastic piece (23),

the push rod (21) is provided with an outwards protruding matching part (213) at one side facing the buckling mechanism (5), the buckling mechanism (5) is used for clamping the matching part (213) to limit the push rod (21) during closing,

the control mechanism is electrically connected with the automatic tripping mechanism (7), the automatic tripping mechanism (7) is triggered to drive the buckling mechanism (5) to be far away from the matching part (213), and the reset elastic piece (23) drives the push rod (21) to reset immediately.

2. The circuit breaker according to claim 1, characterized in that it further comprises a manual trip mechanism (6),

the manual tripping mechanism (6) comprises a rotating piece (61) rotatably arranged in the shell (1), a second elastic piece (63) arranged at the periphery of the rotating piece (61) and a tripping button (62) penetrating through the inserting side (12),

the rotating piece (61) is provided with a pressing part (612) extending to the buckling mechanism (5) and a pulling part (614) matched with the second elastic piece (63),

the trip button (62) can be displaced towards the direction of the rotating piece (61) by an external force, so as to drive the pressing part (612) and the pulling part (614) to rotate, further drive the buckling mechanism (5) to be far away from the matching part (213) and deform the second elastic piece (63),

the second elastic piece (63) is used for driving the tripping button (62) and the rotating piece (61) to reset.

3. The circuit breaker according to claim 1, characterized in that the snap-in mechanism (5) comprises an elongated push rod (51) and a first elastic member (52) provided at an end of the push rod (51) remote from the mating portion (213),

the ejector rod (51) is used for abutting against the matching part (213) during closing, the ejector rod (51) can be forced to displace away from the matching part (213) and compress the first elastic piece (52), and the first elastic piece (52) is used for driving the ejector rod (51) to reset.

4. A circuit breaker according to claim 3, characterized in that the side of the mating part (213) facing the stationary contact (3) is provided with an inclined wall (2131), the push rod (21) passes over the push rod (51) by means of the inclined wall (2131) during displacement in the direction of the stationary contact (3), and the side of the mating part (213) facing away from the stationary contact (3) is provided with a blocking wall (2132), the push rod (51) limiting the push rod (21) by abutting against the blocking wall (2132) after the push rod (21) passes over the push rod (51).

5. The circuit breaker according to claim 3, wherein the automatic trip mechanism (7) includes a bracket (71), a fixed iron core (72) and a movable iron core (73) located in the bracket (71), the fixed iron core (72) being located closer to the mating portion (213) than the movable iron core (73),

the ejector rod (51) is inserted into the bracket (71), one end of the ejector rod (51) close to the matching part (213) protrudes out of the bracket (71),

the fixed iron core (72) is fixed on the ejector rod (51), the control mechanism is electrically connected with the fixed iron core (72), and the movable iron core (73) and the ejector rod (51) are driven to move towards the fixed iron core (72) through electrifying the fixed iron core (72).

6. Circuit breaker according to claim 1, characterized in that the push rod (21) is displaced by a greater amount during closing than the opening distance between the moving contact (24) and the stationary contact (3).

7. Circuit breaker according to claim 6, characterized in that it further comprises a contact spring (22) for providing contact pressure, said contact spring (22) being mounted inside the push rod (21) at the side of the moving contact (24) remote from the stationary contact (3).

8. The circuit breaker according to claim 7, characterized in that said push rod (21) is provided therein with a housing cavity for housing said moving contact (24) and the elastic member (22) for the contact,

the movable contact (24) is movably arranged in the accommodating cavity, the movable contact (24) comprises a movable contact main body (241) positioned in the accommodating cavity,

a first distance (25) is arranged between the side surface of the head part of the movable contact main body (241) and the inner side wall of the accommodating cavity adjacent to the fixed contact (3) in the opening state,

the first distance (25) becomes minimum in a closing state, or the side face of the head of the moving contact main body (241) is attached to the inner side wall of the accommodating cavity adjacent to the fixed contact (3).

9. The circuit breaker according to claim 1, characterized in that the insertion side (12) is provided with a second receptacle (122) into which a supply line is inserted,

the circuit breaker further comprises a conductive component (9), one side of the conductive component (9) is located at the periphery of the second jack (122), and the other side of the conductive component (9) is mechanically and electrically connected with the moving contact (24).

10. The circuit breaker according to claim 1, further comprising a load contact (4) disposed in the housing (1) and electrically connected to the stationary contact (3), wherein the load contact (4) and the moving contact (24) are respectively located at two sides of the stationary contact (3) along the length direction of the circuit breaker.