CN118213243A - Small-sized double-break accessory and small-sized circuit breaker - Google Patents

Abstract

The application discloses a small double-break accessory and a small circuit breaker, which comprise an accessory shell, a first terminal, a second terminal, a release and a control mechanism, wherein the first terminal, the second terminal, the release and the control mechanism are arranged on the accessory shell; the first contact assembly and the second contact assembly are driven by the control mechanism to realize the mutual transition between the on state and the off state; the first terminal, the second terminal, the first contact component and the second contact component all belong to a part of a loop where the release coil is located, and when the control mechanism is in a switching-off state, the first contact component and the second contact component are in a switching-off state so that the loop where the release coil is located presents an open circuit; the application has the characteristic of being applicable to high-voltage direct current environment.

Description

Small-sized double-break accessory and small-sized circuit breaker

Technical Field

The application relates to the field of electric appliances, in particular to an accessory of a miniature circuit breaker.

Background

There are many accessories of small-sized circuit breaker, such as overvoltage, undervoltage, overvoltage and undervoltage, shunt excitation, auxiliary and alarm, etc., and these accessories are often spliced on one side of the circuit breaker pole to be used with the circuit breaker.

The use of shunt release, one of the accessories, is also very frequent and is often used for remotely opening the circuit breaker to control the opening circuit. The shunt release can be spliced on one side of a circuit breaker pole in an accessory mode, the release and the control mechanism are arranged in the shunt release, the shunt release is connected in a signal loop, when a signal is received, the release is electrified, and the control mechanism is driven to act so as to drive the control mechanism in the circuit breaker pole to act, so that the switching-off is realized. However, the release of the shunt release cannot be electrified for a long time, so that a group of moving and static contacts also exist on a loop of the release, and the moving and static contacts are separated when the control mechanism moves, so that the loop where the release is located is in an open circuit state. The principle is basically adopted by the shunt release in the miniature circuit breaker disclosed in CN 206877941U.

The existing shunt release has only one group of moving and static contacts on a loop, and can be also called a single-breakpoint structure, and the shunt release with the structure can only be applied to an environment with alternating current voltage or direct current voltage below 48V.

Along with the continuous development of wind, light, electricity and storage in the electric power field in China in recent years, the requirements on the direct-current switching appliances are higher and higher. In particular, the single-breakpoint shunt release is difficult to be applied in a high-voltage direct-current environment.

Therefore, how to design a novel small-sized double-break accessory which can meet the requirement of the application in the high-voltage direct-current environment as far as possible is a research-worthy direction.

Disclosure of Invention

In view of the above, the present application aims to overcome the defects in the prior art, and aims to provide a small-sized double-break accessory and a circuit breaker, which can meet the application under the high-voltage direct current environment as far as possible.

The application provides a small double-break accessory which comprises an accessory shell, a first terminal, a second terminal, a release and a control mechanism, wherein the first terminal, the second terminal, the release and the control mechanism are arranged on the accessory shell; the control mechanism is provided with a closing state and a separating brake state, and the driving control mechanism can enable the control mechanism to be converted between the closing state and the separating brake state; the release is actuated when receiving a release signal, so that the control mechanism is converted into a switching-off state from a switching-on state; the first contact assembly and the second contact assembly are driven by the control mechanism to realize the mutual transition between the on state and the off state; the first terminal, the second terminal, the first contact assembly and the second contact assembly all belong to a part of a loop where the release coil is located, and when the control mechanism is in a switching-off state, the first contact assembly and the second contact assembly are in a switching-off state so that the loop where the release coil is located presents an open circuit.

Compared with the single break point in the prior art, the two-set contact assembly structure can enable the loop where the release coil is located to have two break points, effectively improves breaking capacity, and is applicable to a direct current environment higher than 48V, and is also applicable to a high-voltage direct current environment.

In some embodiments of the present application, the first contact assembly includes a first moving contact and a first fixed contact, the first contact assembly has an on state in which the first moving contact is in contact with the first fixed contact, and an off state in which the first moving contact is separated from the first fixed contact; the second contact component comprises a second moving contact and a second fixed contact, the on state of the second contact component is that the second moving contact is contacted with the second fixed contact, and the off state of the second contact component is that the second moving contact is separated from the second fixed contact; the release coil is provided with a first lead and a second lead, the first lead is electrically connected with the first terminal, and the second lead is electrically connected with the first static contact; the first moving contact is electrically connected with the second moving contact; the second static contact is electrically connected with the second wiring terminal.

The two break points formed by adopting the structure are in a mutual series connection relationship, so that the breaking capacity is greatly improved.

In some embodiments of the present application, a partition is disposed in the accessory housing, and the partition is fixed with the accessory housing in a plugging or clamping manner, and separates the first contact assembly from the second contact assembly.

By adopting the design of the partition plate, the two contact assemblies can avoid mutual arc channeling in the breaking process, the breaking capacity is further improved, and the contact assemblies are prevented from being ablated due to arc channeling.

In some embodiments of the present application, the accessory housing includes a first housing and a second housing, a first limiting bump is provided on the second housing, a first clamping groove is provided on the first limiting bump, and a first static contact is clamped on the first clamping groove; the first shell or the partition plate is provided with a second limiting lug, the limiting lug is provided with a second clamping groove, and the second fixed contact is clamped on the second clamping groove.

By adopting the structure, the assembly of the first fixed contact and the second fixed contact is facilitated. Especially, be provided with the scheme of the spacing lug of second on the baffle, this kind of scheme can make the second casing need not to set up the mounting structure of second static contact, make second casing structure shaping easier, set up the spacing lug of second on the baffle simultaneously, can further improve the creepage distance between first contact assembly to the second contact assembly (this is because if spacing lug is set up on the second casing, then the creepage distance of first contact assembly to the second contact assembly just is the distance between the three smooth surfaces of baffle only, and if set up spacing lug on the baffle, creepage distance will need increase spacing lug's relevant size, is equivalent to having increased creepage distance).

In some embodiments of the application, the control mechanism includes a support member that is rotatably disposed relative to the accessory housing; a first mounting groove is formed in the first surface of the support piece, and a second mounting groove is formed in the second surface of the support piece; the first moving contact is clamped in the first mounting groove, and the second moving contact is clamped in the second mounting groove; the first moving contact and the second moving contact are electrically connected through soft connection, the first mounting groove and the second mounting groove are communicated on one side surface of the supporting piece, and the soft connection is located at the communicating position.

By adopting the structure, the first mounting groove, the second mounting groove and the communication arrangement between the first mounting groove and the second mounting groove are more compact when the first moving contact and the second moving contact are arranged on the supporting piece, and meanwhile, the arrangement of soft connection is also very beneficial.

In some embodiments of the present application, the first moving contact and the second moving contact are conductive spring plates; the first moving contact, the second moving contact and one matched end of the supporting piece are U-shaped bending structures, and the two U-shaped bending structures are respectively clamped in the first mounting groove and the second mounting groove.

By adopting the structure, the elastic sheet is adopted as the moving contact, so that certain contact pressure exists when the contact assembly is connected, the contact stability is improved, meanwhile, the elastic sheet structure is lighter and thinner, the U-shaped bending structure can be easily clamped with the first mounting groove and the second mounting groove of the supporting piece, and the assembly of workers is facilitated.

In some embodiments of the present application, the blocking member is fastened to the support member, and the blocking member includes a first baffle and a second baffle, where the first baffle is located on the first surface to limit the first moving contact from falling off from the first mounting groove, and the second baffle is located on the second surface to limit the second moving contact from falling off from the second mounting groove.

The blocking piece can prevent the first moving contact and the second moving contact from falling off through the first baffle plate and the second baffle plate, so that the installation stability of the first moving contact and the second moving contact is improved.

In some embodiments of the application, the control mechanism further comprises a handle, a pull rod, a first fastener, a second fastener, and a mechanism spring; the handle is rotatably arranged on the accessory shell, the first end of the pull rod is connected with the handle, and the other end of the pull rod is connected with the first fastener; the first fastener and the second fastener are both rotatably arranged on the same surface of the supporting piece, and an overlap joint state and a separation state are arranged between the first fastener and the second fastener; the mechanism spring is connected between the support piece and the accessory shell; when the control mechanism is in a closing state, the mechanism spring is in an energy storage state, and the first fastener and the second fastener are in a lap joint state so that the whole control mechanism is in a stable state; when the first fastener and the second fastener are converted into a separation state, the stable state of the control mechanism is broken, and the control mechanism is converted into a brake separation state under the action of a mechanism spring; the second fastener portion is positioned adjacent to the release, and actuation of the release urges the second fastener to rotate to cause the control mechanism to transition to the tripped state.

By adopting the control mechanism, the structure is very simplified, a steady state can be easily formed during closing, and the first fastener and the second fastener can release the overlap state at least slightly by applying force, so that the control mechanism is opened, and the release force is smaller.

In some embodiments of the application, a window is formed on the accessory shell, and a state feedback component is arranged in the accessory shell; the state feedback assembly comprises a locking piece, a feedback piece, a reset spring and a feedback boss arranged on the accessory shell, wherein the feedback boss is positioned right below the window; the locking piece and the feedback piece are both rotatably arranged with the accessory shell, and the reset spring is connected between the locking piece and the feedback piece; the locking piece is provided with a driven end positioned near the release and a locking end positioned near the feedback piece, and the feedback piece is provided with a feedback end and a matching end; the matching end and the locking end are in a locking state and a separating state, and when the matching end and the locking end are in the locking state, the matching end and the locking end are mutually locked, and the reset spring is in an energy storage state; after the release is actuated, the driven end is pushed to rotate so that the matching end and the locking end are converted into a separated state, the feedback piece rotates under the action of the reset spring, and the feedback end deflects to be right above the feedback boss and appears in the window; the support piece is also provided with a reset rod, the feedback piece is positioned in the motion track of the reset rod, and in the process of realizing closing operation of the control mechanism, the reset rod pushes the feedback piece to rotate so as to enable the matching end and the locking end to be locked again, and meanwhile, the feedback end is reset, and a feedback boss appears in the window.

Through show feedback boss, feedback end in the window, can be striking remind this annex of user whether move to the structure can be through utilizing the reset lever to reset at the in-process of closing a floodgate, and the structure is very succinct.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 illustrates a perspective view of a small form factor dual break attachment in accordance with an embodiment of the present application;

FIG. 2 is a schematic diagram of the small and medium-sized double-break accessory in the embodiment of the application after the small and medium-sized double-break accessory is removed from the first housing and the control mechanism is in a brake-off state;

FIG. 3 is a schematic diagram of the small and medium-sized double-break accessory in the embodiment of the application after the small and medium-sized double-break accessory is removed from the first housing and the control mechanism is in a closed state;

FIG. 4 is a schematic diagram of a control mechanism and contact assembly according to an embodiment of the present application;

FIG. 5 is a schematic view of the first and second movable contacts and the supporting member according to the embodiment of the present application;

FIG. 6 is a schematic diagram of another view of the first and second movable contacts and the supporting member according to the embodiment of the present application;

FIG. 7 is a schematic diagram of a first stationary contact and a second stationary contact with a separator according to an embodiment of the present application;

fig. 8 is a schematic structural diagram of a first moving contact according to an embodiment of the present application;

FIG. 9 is a schematic diagram of a feedback assembly in a locked state in an embodiment of the application;

FIG. 10 is a schematic diagram of a feedback assembly in a disconnected state in an embodiment of the application;

fig. 11 is a schematic diagram illustrating the cooperation between the second housing and the first stationary contact in the embodiment of the present application;

FIG. 12 shows an exploded view of a small double break accessory according to an embodiment of the present application;

FIG. 13 is a schematic diagram showing a control mechanism in a closed state and a feedback assembly in a locked state in an embodiment of the present application;

FIG. 14 is a schematic diagram showing a control mechanism in a brake-off state and a feedback assembly in a separated state in an embodiment of the application;

fig. 15 shows a cross-sectional view of the barrier mounting in an embodiment of the application.

Detailed Description

Embodiments of the present application are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the application.

In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present application and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present application.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present application, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.

In the present application, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "electrically connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed, mechanically connected, electrically connected, directly connected, indirectly connected via an intermediate medium, or in communication between two elements or in an interaction relationship between two elements. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art according to the specific circumstances.

In the present application, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.

Examples

As shown in fig. 1-15, an embodiment of the present application is a miniature double-break trip. The shunt release belongs to a shunt release of a miniature circuit breaker, and is used for being assembled on one side of a circuit breaker pole so as to form the miniature circuit breaker capable of being remotely disconnected. The number of breaker poles may be one pole or multipole. When the shunt release is assembled on one side of the breaker pole, the shunt release is connected in the signal circuit, and when the signal circuit generates a release signal, the shunt release can drive the breaker pole to trip, so that the effect of remotely switching off the breaker is realized.

The miniature double-break accessory comprises an accessory housing, a first terminal 101, a second terminal 102, a release, a first contact assembly 103, a second contact assembly 104 and a control mechanism 105.

The accessory housing has a generally convex structure and includes a first housing 100a and a second housing 100b, and the first housing 100a and the second housing 100b are fastened by a snap-fit and rivet-fit connection. The first case 100a and the second case 100b may be fixed not only by the above-described method but also by simple caulking or simple engagement, or even by screw fastening. So long as the accessory housing is ensured to form a stable state.

The first terminal 101 and the second terminal 102 are used for connection to an external circuit, that is, the signal circuit described above. In this embodiment, the accessory case includes a longitudinal direction X, a height direction Z, and a width direction Y, and the first terminal 101 and the second terminal 102 are arranged side by side in the width direction Y of the accessory case, and are arranged at the same height on the same side in the longitudinal direction X of the accessory case. Of course, other arrangements are possible, for example, on both sides of the accessory housing in the longitudinal direction X, or at different heights although on the same side of the accessory housing in the longitudinal direction X. Whichever arrangement mode is adopted, the convenient wiring can be ensured.

The release, basically adopting the principle of electromagnet, comprises a release coil 103, an armature and other parts, when the release coil 103 is electrified (namely when the above-mentioned number circuit generates a release signal), the armature moves under the action of magnetic force to directly or indirectly push the control mechanism 105, so that the control mechanism 105 is converted into a brake-separating state from a brake-closing state. The direct action here means that the armature itself is a plunger, and the push control mechanism 105 is extended, and the indirect action here means that an insulating plunger is further included, and the armature pushes the control mechanism 105 by pushing the insulating plunger. Whether direct or indirect, it is ensured that the control mechanism 105 transitions from a closed state to an open state.

The first contact assembly 103 includes a first moving contact 103a and a first fixed contact 103b. The first moving contact 103a and the first fixed contact 103b have two states of contact and separation, namely, an on state and an off state corresponding to the first contact assembly 103. The second contact assembly 104 includes a second moving contact 104a and a second fixed contact 104b. The second moving contact 104a and the second fixed contact 104b have two states of contact and separation, namely an on state and an off state corresponding to the second contact assembly 104. The first contact assembly 103 and the second contact assembly 104 are simultaneously connected or disconnected under the control of the control mechanism 105.

The first contact assembly 103, the second contact assembly 104, the first terminal 101 and the second terminal 102 are all part of a circuit in which the trip coil 103 is located, and simply stated, an external signal can be transmitted to the trip coil 103 only when the first contact assembly 103 and the second contact assembly 104 are both in an on state.

The first contact assembly 103 and the second contact assembly 104 are electrically connected in particular such that the trip coil 103 necessarily has two leads, a first lead and a second lead, respectively. The first lead is electrically connected to the first terminal 101, where the electrical connection may be a wire. The second lead is electrically connected to the first stationary contact 103b, where the electrical connection may be a wire. The first moving contact 103a is electrically connected to the second moving contact 104a, where the electrical connection is through the soft link 106, and a hard connection manner other than the soft link 106 may be adopted. The second stationary contact 104b is electrically connected to the second connection terminal, where the electrical connection may be a wire. Thus, when the first moving contact 103a contacts the first fixed contact 103b, the second moving contact 104a contacts the second fixed contact 104b, and the loop (i.e. the signal circuit) where the trip coil 103 is located presents a path state, if a signal is generated, the trip coil 103 can obtain the signal to actuate the trip. When the first moving contact 103a is separated from the first fixed contact 103b, the second moving contact 104a is separated from the second fixed contact 104b, and at this time, a loop (that is, the signal circuit) where the release coil 103 is located presents an open circuit state, so that after the release is actuated, the release coil 103 cannot be electrified, and the release coil 103 is prevented from being burnt due to long-time electrification.

Here, in order to prevent the occurrence of arcing between the two contact assemblies. A spacer 107 is provided between the two contact assemblies, wherein the spacer 107 is in a plug-in fit with the second housing 100b, although it is also possible to fix the two contact assemblies by means of a snap-in connection. After the partition plate 107 is installed, the partition plate 107 can just separate the first fixed contact 103b and the second fixed contact 104b, and can also separate a part of the first moving contact 103a and the second moving contact 104 a. Here, the first stationary contact 103b and the second stationary contact 104b may be fixed in the following manner. That is, the second housing 100b is provided with a first limiting bump 100c, the first limiting bump 100c is provided with a first clamping groove 100d, and the first stationary contact 103b is clamped in the first clamping groove 100d, so as to ensure stable installation of the first stationary contact 103 b. And a second limiting bump 107a is disposed on the surface of the partition 107 facing the first housing 100a, a second clamping groove 107b is disposed on the second limiting bump 107a, and the second stationary contact 104b is clamped in the second clamping groove 107 b. Of course, in addition to this, the second limiting projection 107a may be provided on the first housing 100 a. No matter where it is provided, it is sufficient to ensure that the second stationary contact 104b can be stably mounted. The first and second engaging grooves 100d and 107b have many shapes, and are L-shaped in the present application, for example, and the corresponding stationary contact is also L-shaped.

The control mechanism 105 is a four bar linkage mechanism and comprises a handle 105a, a pull rod 105b, a first fastener 105c, a second fastener 105d, a support member 105e, a mechanism spring 105f, a second fastener return spring 105g and a second fastener mounting member 105h.

The handle 105a is rotatably provided on the accessory housing, and a first end of the pull rod 105b is connected to a non-rotation center position of the handle 105 a.

The supporting member 105e is rotatably disposed inside the accessory housing, and the mechanism spring 105f is connected between the supporting member 105e and the accessory housing, where the mechanism spring 105f is a torsion spring, and of course, a tension spring, a compression spring, and other forms may be adopted, so long as the mechanism spring 105f can be guaranteed to store energy to implement the opening operation. The first moving contact 103a and the second moving contact 104a are both arranged on the supporting member 105e, so that the rotation of the supporting member 105e can drive the first moving contact 103a and the second moving contact 104a to move, thereby realizing the transition between the on state and the off state. Here, a first mounting groove 105e1 and a second mounting groove 105e2 are formed in a position below the support 105e, and the first mounting groove 105e1 and the second mounting groove 105e2 are formed on different surfaces of the support 105 e. The first mounting groove 105e1 is located on the first surface, and the second mounting groove 105e2 is located on the second surface. Here, the first mounting groove 105e1 and the second mounting groove 105e2 are communicated at one side surface of the support 105 e. In this way, the first moving contact 103a can be locked in the first mounting groove 105e1, the second moving contact 104a can be locked in the second mounting groove 105e2, and then the flexible connection 106 can be set at the communication position 105e 3. In this embodiment, the first moving contact 103a and the second moving contact 104a are elastic pieces, and the advantage of using the elastic pieces is that the elastic pieces have good elasticity and can ensure the contact pressure. Meanwhile, the elastic sheet is thinner, and then is bent, for example, a U-shaped bending structure 1034U is formed, and then is clamped in the corresponding mounting groove to be propped against the groove wall of the mounting groove so as to ensure the mounting stability. The stopper 109 is provided to prevent the first moving contact 103a and the second moving contact 104a from falling off. In the present embodiment, the stopper 109 has a U-shaped structure, and the stopper 109 includes a first baffle 109a, a second baffle 109b, and a connecting portion 109c connecting the first baffle 109a and the second baffle 109 b. The first shutter 109a is on the first surface, i.e., is shielded on the first mounting groove 105e1, thus preventing the first movable contact 103a from coming off. The second shutter 109b is on the second surface, i.e., is shielded on the second mounting groove 105e2, thus preventing the second movable contact 104a from coming off. The blocking element 109 is snapped into place by the snap-in support 105 e.

The first fastening member 105c and the second fastening member 105d are rotatably disposed on the same surface of the supporting member 105e, wherein a non-rotation center position of the first fastening member 105c is connected to the second end of the pull rod 105b, such that the first fastening member 105c is rotated when the handle 105a is rotated.

The second fastener 105d is inserted into the second fastener mounting member 105h, so that the second fastener 105d can be stably rotatably disposed on the supporting member 105e, and the second fastener return spring 105g and the second fastener mounting member 105h are an integral member (the second fastener return spring 105g abuts against the inner wall of the accessory housing), so that the second fastener 105d can be reset by the second fastener return spring 105 g.

Here, since the first fastening component 105c and the second fastening component 105d both have the joint surface 105cd, the first fastening component 105c and the second fastening component 105d have two states, one is the first fastening component 105c and the second fastening component 105d, and the other is the state in which they are separated. In the process of driving the control mechanism 105 to realize closing, the handle 105a is rotated, the pull rod 105b pushes the first fastening piece 105c to rotate, so that the first fastening piece 105c and the second fastening piece 105d are in lap joint to form a stable state, at this time, the handle 105a is continuously rotated, the force is transmitted to the supporting piece 105e, so that the supporting piece 105e rotates, until the first contact component 103 and the second contact component 104 are both in a switch-on state, the mechanism spring 105f is in an energy storage state, at this time, the control mechanism 105 is in a closing state (because the first fastening piece 105c and the second fastening piece 105d are in the lap joint state, the handle 105a, the pull rod 105b, the first fastening piece 105c, the second fastening piece 105d, the mechanism spring 105f and the like form a stable state, and the control mechanism 105 is kept in the closing state). When the release is actuated (due to the release signal), the release is located near the second fastener 105d, and the release drives the second fastener 105d to rotate, so that the stable state is broken, and at the same time, the control mechanism 105 is driven to perform the opening operation by the action of the mechanism spring 105f, so as to change into the opening state, and meanwhile, the first contact assembly 103 and the second contact assembly 104 change into the opening state.

Here, in order to enable a more intuitive feedback of such information to the user, a status feedback component is also provided. A window 100e is formed in the first housing 100a, and the status feedback assembly includes a locking member 108a, a feedback member 108b, a return spring 108c, and a feedback boss 100f.

The feedback boss 100f is located directly below the window 100 e.

The locking member 108a is rotatably connected to the first housing 100a, and the locking member 108a includes a receiving end 108a2 and a locking end 108a1. The passive end 108a2 is positioned adjacent the trip unit such that actuation of the trip unit urges the passive end 108a2 to rotate the locking member 108 a.

The feedback member 108b is also rotatably disposed on the first housing 100a, and the feedback member 108b includes a feedback end 108b1 and a mating end 108b2, where the feedback end 108b1 is positioned adjacent the window 100e and the mating end 108b2 is positioned adjacent the locking end 108a 1. There are two states between the mating end 108b2 and the locking end 108a1, one being a mutually locked state, i.e. a locked state. The other is the state where the two are separated, also called the separated state.

The return spring 108c is connected between the locking member 108a and the feedback member 108b, and the return spring 108c is in an energy storage state when the two are in a locked state with the mating end 108b2 and the locking end 108a 1. Thus, when the release is actuated to rotate the locking member 108a, the feedback member will rotate under the action of the return spring 108c, so that the feedback end 108b1 rotates above the feedback boss 100f, that is, the feedback end 108b1 is seen through the window 100e, which reminds the user that the accessory is acting. The return spring 108c is a torsion spring, but other modes such as a spring plate, a tension spring, a compression spring, etc. can be adopted.

The support member 105e is provided with a reset lever 105i, where the feedback member 108b is located in the motion track of the reset lever 105i, specifically, the feedback member 108b is located in the motion track of the reset lever 105i when the support member 105e moves in the closing direction, so that the feedback member 108b can be pushed to rotate by the motion of the reset lever 105i, so that the locking between the feedback member 108b and the locking member 108a is completed again, that is, the matching end 108b2 and the locking end 108a1 are in a locking state for the next trip actuation.

In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present application. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.

While embodiments of the present application have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the application, and that variations, modifications, alternatives and variations may be made to the above embodiments by one of ordinary skill in the art within the scope of the application.

Claims (10)

1. A small double-break accessory comprises an accessory shell, a first terminal, a second terminal, a release and a control mechanism, wherein the first terminal, the second terminal, the release and the control mechanism are arranged on the accessory shell; the control mechanism is provided with a closing state and a separating brake state, and the driving control mechanism can enable the control mechanism to be converted between the closing state and the separating brake state; the release is actuated when receiving a release signal, so that the control mechanism is converted into a switching-off state from a switching-on state; the method is characterized in that: the first contact assembly and the second contact assembly both comprise an on state and an off state, the on state corresponds to the on state of the control mechanism, the off state corresponds to the off state of the control mechanism, and the first contact assembly and the second contact assembly are driven by the control mechanism to realize the mutual transition between the on state and the off state; the first terminal, the second terminal, the first contact assembly and the second contact assembly all belong to a part of a loop where the release coil is located, and when the control mechanism is in a switching-off state, the first contact assembly and the second contact assembly are in a switching-off state so that the loop where the release coil is located presents an open circuit.

2. A miniature dual break accessory according to claim 1, characterized in that: the first contact assembly comprises a first moving contact and a first fixed contact, the on state of the first contact assembly is that the first moving contact is contacted with the first fixed contact, and the off state of the first contact assembly is that the first moving contact is separated from the first fixed contact; the second contact component comprises a second moving contact and a second fixed contact, the on state of the second contact component is that the second moving contact is contacted with the second fixed contact, and the off state of the second contact component is that the second moving contact is separated from the second fixed contact; the release coil is provided with a first lead and a second lead, the first lead is electrically connected with the first terminal, and the second lead is electrically connected with the first static contact; the first moving contact is electrically connected with the second moving contact; the second static contact is electrically connected with the second wiring terminal.

3. A miniature dual break accessory according to claim 2, characterized in that: the accessory shell is internally provided with a baffle plate, the baffle plate is fixedly connected with the accessory shell in a plugging or clamping way, and the baffle plate separates the first contact assembly from the second contact assembly.

4. A miniature dual break accessory according to claim 3, characterized in that: the accessory shell comprises a first shell and a second shell, a first limiting lug is arranged on the second shell, a first clamping groove is formed in the first limiting lug, and a first fixed contact is clamped on the first clamping groove; the first shell or the partition plate is provided with a second limiting lug, the limiting lug is provided with a second clamping groove, and the second fixed contact is clamped on the second clamping groove.

5. A miniature dual break accessory according to claim 2, characterized in that: the control mechanism comprises a support piece which is arranged in a rotating way relative to the accessory shell; a first mounting groove is formed in the first surface of the support piece, and a second mounting groove is formed in the second surface of the support piece; the first moving contact is clamped in the first mounting groove, and the second moving contact is clamped in the second mounting groove; the first moving contact and the second moving contact are electrically connected through soft connection, the first mounting groove and the second mounting groove are communicated on one side surface of the supporting piece, and the soft connection is located at the communicating position.

6. A miniature dual break accessory according to claim 5, wherein:

The first moving contact and the second moving contact are conductive elastic sheets, one ends of the first moving contact and the second moving contact, which are matched with the supporting piece, are U-shaped bending structures, and the two U-shaped bending structures are respectively clamped in the first mounting groove and the second mounting groove;

Or/and, still include the barrier, the barrier is fixed for the joint with support piece, the barrier is including setting up at first baffle and second baffle, and first baffle is located on the first surface in order to restrict first moving contact and drops by first mounting groove, and the second baffle is located on the second surface in order to restrict second moving contact and drops by the second mounting groove.

7. A miniature dual break accessory according to claim 5, wherein: the control mechanism further comprises a handle, a pull rod, a first fastener, a second fastener and a mechanism spring; the handle is rotatably arranged on the accessory shell, the first end of the pull rod is connected with the handle, and the other end of the pull rod is connected with the first fastener; the first fastener and the second fastener are both rotatably arranged on the same surface of the supporting piece, and an overlap joint state and a separation state are arranged between the first fastener and the second fastener; the mechanism spring is connected between the support piece and the accessory shell; when the control mechanism is in a closing state, the mechanism spring is in an energy storage state, and the first fastener and the second fastener are in a lap joint state so that the whole control mechanism is in a stable state; when the first fastener and the second fastener are converted into a separation state, the stable state of the control mechanism is broken, and the control mechanism is converted into a brake separation state under the action of a mechanism spring; the second fastener portion is positioned adjacent to the release, and actuation of the release urges the second fastener to rotate to cause the control mechanism to transition to the tripped state.

8. A miniature dual break accessory according to claim 7, wherein: the accessory shell is provided with a window, and a state feedback assembly is arranged in the accessory shell; the state feedback assembly comprises a locking piece, a feedback piece, a reset spring and a feedback boss arranged on the accessory shell, wherein the feedback boss is positioned right below the window; the locking piece and the feedback piece are both rotatably arranged with the accessory shell, and the reset spring is connected between the locking piece and the feedback piece; the locking piece is provided with a driven end positioned near the release and a locking end positioned near the feedback piece, and the feedback piece is provided with a feedback end and a matching end; the matching end and the locking end are in a locking state and a separating state, and when the matching end and the locking end are in the locking state, the matching end and the locking end are mutually locked, and the reset spring is in an energy storage state; after the release is actuated, the driven end is pushed to rotate so that the matching end and the locking end are converted into a separated state, the feedback piece rotates under the action of the reset spring, and the feedback end deflects to be right above the feedback boss and appears in the window; the support piece is also provided with a reset rod, the feedback piece is positioned in the motion track of the reset rod, and in the process of realizing closing operation of the control mechanism, the reset rod pushes the feedback piece to rotate so as to enable the matching end and the locking end to be locked again, and meanwhile, the feedback end is reset, and a feedback boss appears in the window.

9. A miniature double break accessory according to any of claims 1-7, characterized in that: the accessory shell comprises a length direction, a height direction and a width direction, wherein the first terminal and the second terminal are arranged side by side in the width direction of the accessory shell and are arranged on the same height on the same side of the length direction of the accessory shell;

or the accessory shell comprises a length direction, a height direction and a width direction, and the first terminal and the second terminal are arranged at different height positions on the same side of the accessory shell in the length direction;

or, the accessory housing includes a length direction, a height direction, and a width direction, and the first terminal and the second terminal are disposed on both sides of the accessory housing in the length direction.

10. A miniature circuit breaker comprising at least one pole breaker pole, characterized in that: a miniature double break accessory as claimed in any one of claims 1-9 spliced on one side of a circuit breaker pole.