CN217691009U - Electric leakage mechanism and circuit breaker - Google Patents

Abstract

The utility model relates to a low-voltage apparatus technical field, in particular to a leakage mechanism and a breaker; the circuit breaker comprises a leakage mechanism, the leakage mechanism comprises a shell, a release, a button, a connecting rod and an elastic arm, and the release is arranged on the shell; the button is movably arranged on the shell and can extend out or retract relative to the shell; the connecting rod is rotatably arranged on the shell and can be abutted against or separated from the button; the release is in transmission fit with the connecting rod and is used for driving the connecting rod to be separated from the button; the connecting rod can be in transmission fit with an air opening mechanism of the circuit breaker; the elastic arm is connected with the connecting rod and is propped against the button; when the tripper drives the connecting rod to rotate to be separated from the button, the elastic arm can drive the button to extend out of the shell. The utility model discloses a structure of electric leakage mechanism is simplified for electric leakage mechanism and circuit breaker assemble more easily, and can improve production efficiency.

Description

Electric leakage mechanism and circuit breaker

Technical Field

The utility model relates to a low-voltage apparatus technical field particularly, relates to an electric leakage mechanism and circuit breaker.

Background

In the related art, an electronic residual current operated circuit breaker (RCBO) is generally required to protect electrical equipment and personal safety; the working principle of the circuit breaker comprises: when residual current (human body electric shock) exists, the mutual inductor transmits information to the PCBA after detecting a signal, the leakage coil is conducted, the coil is electrified, the push rod of the tripper pushes the leakage mechanism to be tripped, and the air opening mechanism of the circuit breaker is enabled to trip, so that leakage protection is achieved. In the related art, in order to ensure that the circuit breaker can be continuously and normally used after the electric leakage fault is eliminated, the electric leakage mechanism is also provided with a button, and when the electric leakage condition occurs, the idle opening mechanism of the circuit breaker can be tripped, and the button can also be synchronously extended out of the shell of the electric leakage mechanism; when the leakage fault is eliminated, the button is pressed, and then the breaker is manually switched on, so that the breaker can be continuously and normally used.

However, in the related art, the leakage mechanism has a complex structure, is inconvenient to assemble and has low production efficiency.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide an electric leakage mechanism and circuit breaker, its structure that can simplify electric leakage mechanism for electric leakage mechanism and circuit breaker assemble more easily, and can improve production efficiency.

The embodiment of the utility model is realized like this:

in a first aspect, the present invention provides an electric leakage mechanism for a circuit breaker, the electric leakage mechanism includes:

a housing;

the release is arranged on the shell;

the button is movably arranged on the shell and can extend or retract relative to the shell;

the connecting rod is rotatably arranged on the shell and can be abutted against or separated from the button; the release is in transmission fit with the connecting rod and is used for driving the connecting rod to be separated from the button; the connecting rod can be in transmission fit with an air opening mechanism of the circuit breaker;

the elastic arm is connected with the connecting rod and abuts against the button; wherein the content of the first and second substances,

when the release drives the connecting rod to rotate to be separated from the button, the elastic arm can drive the button to extend out of the shell.

In an optional embodiment, the leakage mechanism further comprises an elastic piece, the elastic piece is arranged on the shell, and the elastic piece can be in transmission fit with the button and the connecting rod; when the tripper drives the connecting rod to rotate to be separated from the button, the button can extend out relative to the shell under the combined action of the elastic piece and the elastic arm, and the elastic piece can drive the connecting rod to trip the idle opening mechanism.

In an alternative embodiment, the elastic member is a torsion spring, a first torsion arm of the torsion spring is connected with the housing, and a second torsion arm of the torsion spring is connected with the button and can be matched with the connecting rod.

In an alternative embodiment, the button is provided with a catch, and the second torque arm is snapped into the catch.

In an alternative embodiment, the connecting rod comprises a connecting rod body and a first arm, the connecting rod body is rotatably arranged on the shell, the elastic arm and the first arm are both connected with the connecting rod body, and the elastic piece can be in transmission fit with the first arm, so that the first arm can drive the idle opening mechanism to trip under the action of the elastic piece.

In an optional embodiment, the connecting rod further comprises an abutting part, the abutting part is connected with the first arm, and the elastic part can abut against the abutting part to drive the first arm to drive the air release mechanism to trip.

In an optional implementation mode, the shell is provided with an avoidance hole, and the avoidance hole is used for penetrating through a linkage shaft of the idle opening mechanism; one end of the first arm, which is far away from the connecting rod body, is provided with a first groove, and the groove wall of the first groove can be abutted against the linkage shaft.

In an optional embodiment, the connecting rod comprises a connecting rod body and a second arm, the connecting rod body is rotatably arranged on the shell, the elastic arm and the second arm are both connected with the connecting rod body, the second arm is provided with a second groove, and the button can be abutted against the groove wall of the second groove.

In an optional embodiment, the button comprises a button body and an abutting part, the abutting part is connected with the button body, the button body is movably arranged in the shell, and the elastic arm is in transmission fit with the button body; at least part of the abutting part can extend into the second groove and abut against the groove wall of the second groove.

In a second aspect, the present invention provides a circuit breaker comprising the leakage mechanism of any of the preceding embodiments.

The utility model discloses electric leakage mechanism's beneficial effect includes: the embodiment of the utility model provides a leakage mechanism, which comprises a shell, a release, a button, a connecting rod and an elastic arm; the release is arranged on the shell; the button is movably arranged on the shell and can extend or retract relative to the shell; the connecting rod is rotatably arranged on the shell and can be abutted against or separated from the button; the release is in transmission fit with the connecting rod and is used for driving the connecting rod to be separated from the button; the connecting rod can be in transmission fit with an air opening mechanism of the circuit breaker; the elastic arm is connected with the connecting rod and is propped against the button; when the tripper drives the connecting rod to rotate to be separated from the button, the elastic arm can drive the button to extend out of the shell. Through the elastic arm connected to the connecting rod, the button can extend out of the shell when electric leakage occurs; when the leakage mechanism is assembled, the connecting rod is assembled in place, and the assembly of the elastic arm can be completed; therefore, the elastic arm is connected to the connecting rod, the structure in the electric leakage mechanism is simplified, the electric leakage mechanism is easier to assemble, and the assembly and production efficiency can be improved.

The utility model discloses circuit breaker's beneficial effect includes: the embodiment of the utility model provides a circuit breaker includes aforementioned electric leakage mechanism, not only can simplify the structure, still assembles more easily, and can improve the efficiency of production, assembly.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and that those skilled in the art can also obtain other related drawings based on these drawings without inventive efforts.

Fig. 1 is a schematic diagram of an internal structure of a circuit breaker according to an embodiment of the present invention;

FIG. 2 is a schematic structural view of a connecting rod according to an embodiment of the present invention;

fig. 3 is a schematic structural diagram of a button according to an embodiment of the present invention;

fig. 4 is a cross-sectional view of a release in an embodiment of the present invention;

fig. 5 is a schematic diagram of an internal structure of a circuit breaker according to an embodiment of the present invention;

fig. 6 is a schematic diagram of the internal structure of the circuit breaker in the embodiment of the present invention;

fig. 7 is a schematic diagram of the internal structure of the circuit breaker in the embodiment of the present invention.

Icon: 010-a circuit breaker; 100-a leakage mechanism; 110-a housing; 111-avoiding holes; 112-a mounting shaft; 120-a release; 121-coil; 122-a spring; 123-a bracket; 124-movable iron core; 125-stationary core; 126-a top rod; 130-a button; 131-a button body; 132-an abutment; 133-a snap-fit post; 134-card slot; 135-buckle surface; 136-an abutment face; 140-a connecting rod; 141-connecting rod body; 142-a first arm; 143-a second arm; 144-a third arm; 145-first groove; 146-a second slot; 147-an abutment; 150-a resilient arm; 160-torsion spring; 161-a first torque arm; 162-a second torque arm; 200-a linkage shaft; 210-handle.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments of the present invention, all other embodiments obtained by a person skilled in the art without making creative efforts belong to the protection scope of the present invention.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", and the like indicate the position or positional relationship based on the position or positional relationship shown in the drawings, or the position or positional relationship which is usually placed when the utility model is used, and are only for convenience of description and simplification of the description, but do not indicate or imply that the device or element to be referred must have a specific position, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another, and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed" and "connected" are to be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

The present embodiment provides a circuit breaker that can be used for leakage, overload, and short-circuit protection.

Referring to fig. 1, the circuit breaker 010 includes an idle opening mechanism and a leakage mechanism 100, wherein the leakage mechanism 100 is mounted on the idle opening mechanism, and in case of leakage, the leakage mechanism 100 can drive the idle opening mechanism to cut off a circuit (trip), so as to achieve a protection effect.

The idle opening mechanism comprises a moving contact, a fixed contact, a linkage shaft 200 and a handle 210; the moving contact can be contacted with or separated from the fixed contact; when the moving contact is contacted with the fixed contact, the circuit is communicated (switched on); when the moving contact is separated from the fixed contact, the circuit is cut off (tripped); the linkage shaft 200 and the handle 210 are in transmission fit with the moving contact, and the leakage mechanism 100 is in transmission fit with the linkage shaft 200; when electricity leaks, the electricity leakage mechanism 100 can drive the linkage shaft 200 to move, so that the movable contact and the fixed contact are separated through the linkage shaft 200, the idle opening mechanism trips, and meanwhile, the handle 210 rotates to a tripping position; when the switch needs to be switched on, the handle 210 is rotated to the switch-on position, and the moving contact can be driven to contact with the fixed contact.

Other structures and working principles of the idle opening mechanism which are not mentioned are similar to those of the related art, and are not described in detail herein.

Referring to fig. 1, the leakage mechanism 100 includes a housing 110, a release 120, a button 130, a connecting rod 140, and an elastic arm 150; the housing 110 is assembled to the air opening mechanism; the release 120 is disposed on the housing 110; the button 130 is movably disposed on the housing 110 and can extend or retract relative to the housing 110; the connecting rod 140 is rotatably disposed on the housing 110, and the connecting rod 140 can abut against or separate from the button 130; the release 120 is in transmission fit with the connecting rod 140 and is used for driving the connecting rod 140 to be separated from the button 130; the connecting rod 140 can be in transmission fit with an air opening mechanism of the circuit breaker 010, and particularly, the connecting rod 140 can be in transmission fit with the linkage shaft 200; the elastic arm 150 is connected with the connecting rod 140, and the elastic arm 150 is abutted against the button 130; in case of leakage, the trip unit 120 drives the link 140 to rotate to separate from the button 130, and the elastic arm 150 can drive the button 130 to extend out of the housing 110.

Through the elastic arm 150 connected to the link 140, the button 130 can be extended out of the housing 110 in case of leakage current; when the leakage mechanism 100 is assembled, the assembly of the elastic arm 150 can be completed while the connecting rod 140 is assembled in place; therefore, the elastic arm 150 is connected to the connecting rod 140, so that the internal structure of the leakage mechanism 100 is simplified, the leakage mechanism 100 is easier to assemble, and the assembly and production efficiency can be improved.

Since the button 130 protrudes from the case 110 when the leakage occurs, the user can determine whether or not the leakage occurs by determining whether or not the button 130 protrudes from the case 110.

It should be noted that the elastic arm 150 has a number of bending portions, including but not limited to one, two, three, etc., and when the elastic arm 150 is pressed, it will deform itself through the bending portions and store force.

The leakage mechanism 100 further includes an elastic member, the elastic member is disposed on the housing 110, and the elastic member can be in transmission fit with the button 130 and the connecting rod 140; when the trip unit 120 drives the link 140 to rotate away from the button 130, the button 130 can extend relative to the housing 110 under the combined action of the spring and the spring arm 150, and the spring can drive the link 140 to trip the dry opening mechanism. With the arrangement, the button 130 can reliably extend out of the shell 110 under the condition of electric leakage, interference of the elastic piece caused by the fact that the button 130 cannot smoothly extend out of the shell 110 is avoided, the elastic piece can reliably drive the connecting rod 140 to trip the idle opening mechanism, and excellent electric leakage safety protection performance is ensured.

It should be noted that, during current leakage, the release 120 drives the link 140 to rotate, the link 140 is separated from the button 130, and the elastic element can drive the link 140 to trip the idle opening mechanism, specifically: when the release 120 drives the link 140 to separate from the button 130, the elastic element can further drive the link 140 to rotate continuously, that is, the link 140 can reliably drive the linkage shaft 200 under the driving of the elastic action of the elastic element, so as to ensure that the movable contact is reliably separated from the fixed contact, that is, the circuit breaker 010 reliably trips when electric leakage occurs.

In the embodiment, the elastic element continuously acts on the connecting rod 140 in the rear half of the rotation of the connecting rod 140 to rotate and drive the linkage shaft 200 to move so as to drive the moving contact to be separated from the static contact, instead of directly driving the connecting rod 140 to rotate through the tripper 120 and directly driving the connecting rod 140 to drive the idle opening mechanism to be unlocked under the action of the tripper 120, so that the thrust of the connecting rod 140 driven by the elastic element can be adjusted by adjusting the elastic force of the elastic element, so that the linkage shaft 200 is pushed by a larger thrust to separate the moving contact from the static contact, and only the elastic element with a larger elastic force needs to be replaced. In addition, the connecting rod 140 is driven by the elastic element to rotate continuously in the latter half of the rotation of the connecting rod to drive the linkage shaft 200 to separate the movable contact from the fixed contact so as to cut off the circuit, thereby reducing the requirements on the release 120 and ensuring the reliability of the release and cut-off circuit.

It should be noted that when no current leakage occurs, the button 130 retracts into the housing 110, and the button 130 is kept relatively stable, i.e. the state of retracting into the housing 110 is reliably maintained, under the combined action of the link 140, the elastic member and the elastic arm 150.

Referring to fig. 1, the elastic member of the present embodiment is a torsion spring 160, a first torsion arm 161 of the torsion spring 160 is connected to the housing 110, and a second torsion arm 162 of the torsion spring 160 can be engaged with the connecting rod 140. With such arrangement, when electric leakage occurs, the connecting rod 140 can be reliably driven by the torsion spring 160 to drive the linkage shaft 200 to move, so as to drive the moving contact to be separated from the fixed contact; in addition, the two torsion arms of the torsion spring 160 are low in manufacturing cost, and the reliability of the tripping force amplified by the elasticity of the torsion spring 160 is high.

In order to make the structure of the leakage mechanism 100 simple and easy to assemble, the housing 110 is connected with an assembly shaft 112, and the connecting rod 140 and the torsion spring 160 are both sleeved on the assembly shaft 112; of course, in other embodiments, only the torsion spring 160 and the connecting rod 140 need to be coaxially disposed, the torsion spring 160 may be sleeved on the connecting rod 140, and the connecting rod 140 is sleeved on the assembling shaft 112.

To ensure that the torsion spring 160 can be securely connected to the button 130; the button 130 is provided with a locking groove 134, and the second torsion arm 162 is locked with the locking groove 134.

In other embodiments, the second torque arm 162 and the button 130 may be connected by a fastener such as a screw, or welded, and the like, which is not limited in this respect.

It should be noted that when no leakage or leakage fault is eliminated, the button 130 retracts into the housing 110, and the second torsion arm 162 of the torsion spring 160 is engaged with the button 130 and is in clearance fit with the link 140, so as to improve the problem that the leakage mechanism 100 is easy to accidentally trip the idle opening mechanism.

Of course, in other embodiments, the elastic element may also be a tension spring, and the like, and is not limited in this respect.

Referring to fig. 1 and 2, the link 140 includes a link body 141 and a first arm 142, the link body 141 is rotatably disposed on the housing 110, specifically, the link body 141 is rotatably sleeved on the assembly shaft 112, the elastic arm 150 and the first arm 142 are both connected to the link body 141, the elastic member can be in transmission fit with the first arm 142, so that the first arm 142 can drive the idle opening mechanism to trip under the action of the elastic member, specifically, under the condition of electric leakage, the release 120 pushes the link 140 to rotate to separate from the button 130, the elastic member is in transmission fit with the first arm 142, so that the link 140 continues to rotate, and the first arm 142 pushes the linkage shaft 200, so that the moving contact is separated from the stationary contact through the linkage shaft 200, and the idle opening mechanism trips. Through the cooperation of the elastic member and the first arm 142, when the link 140 is separated from the button 130, the link 140 can be reliably driven by the elastic member to continue rotating, and thus the tripping of the idling mechanism can be reliably driven.

Further, the connecting rod 140 further includes an abutting part 147, the abutting part 147 is connected to the first arm 142, and the elastic part can abut against the abutting part 147 to drive the first arm 142 to drive the trip mechanism; specifically, the second torsion arm 162 abuts against the abutting member 147. Through the arrangement of the abutting part 147, the reliable matching between the elastic part and the first arm 142 can be ensured, that is, the second torsion arm 162 can reliably match with the first arm 142 through the abutting part 147, so that when power leakage occurs, the first arm 142 can reliably push the linkage shaft 200 under the action of the torsion spring 160 to separate the movable contact from the fixed contact, and the assembly is simple and easy to operate.

The abutting member 147 may be an abutting column, an abutting block, or the like, and is not particularly limited herein.

In other embodiments, the second torsion arm 162 and the first arm 142 may also be inserted or welded, and the like, and are not limited herein.

Alternatively, the first arm 142 may be a bent arm, or a straight arm, which is not particularly limited herein.

Referring to fig. 1 and 2, the housing 110 is provided with an avoiding hole 111, the linkage shaft 200 penetrates through the avoiding hole 111, one end of the first arm 142 away from the connecting rod body 141 is provided with a first groove 145, and a groove wall of the first groove 145 can abut against the linkage shaft 200. By abutting the groove wall of the first groove 145 and the linkage shaft 200, the linkage shaft 200 can be reliably and stably driven to move until the movable contact and the static contact are separated when electric leakage occurs; and after the electric leakage fault is eliminated, the first arm 142 does not interfere with the resetting of the universal driving shaft 200, so as to ensure that the movable contact can be reliably reset to be in contact with the fixed contact.

Alternatively, the avoiding hole 111 may be a kidney-shaped hole, a rectangular hole, or the like, which is not particularly limited herein.

In a preferred embodiment, the avoiding hole 111 is a kidney-shaped hole, and the linkage shaft 200 coincides with the rotation axis of the connecting rod 140 at the motion center of the kidney-shaped hole.

It should be noted that, when the circuit breaker 010 trips due to electric leakage, the elastic element can enable the connecting rod 140 to reliably abut against the linkage shaft 200, so as to keep the moving contact and the fixed contact reliably separated from each other; if the button 130 extending out of the housing 110 is not pressed back to the retracted housing 110 first, the handle 210 in transmission fit with the movable contact cannot rotate to the switching-on position, that is, the handle 210 cannot directly rotate to the switching-on position to drive the movable contact to move to contact with the fixed contact, that is, when the button 130 is not retracted into the housing 110, under the elastic action of the elastic member, the connecting rod 140 reliably abuts against the linkage shaft 200, so that the relative position of the movable contact in transmission fit with the linkage shaft 200 is stable, and the handle 210 in transmission fit with the movable contact cannot rotate and cannot be switched on; only when the button 130 is pressed to the retracting case 110, the button 130 presses the elastic member, so that the elastic member no longer elastically abuts against the connecting rod 140, and the connecting rod 140 no longer obstructs the movement of the linkage shaft 200, at this time, the handle 210 can be rotated to the closing position, so that the handle 210 drives the moving contact to contact with the fixed contact, and the linkage shaft 200 that is not obstructed by the connecting rod 140 is reset. Thus, after the leakage tripping operation, the risk caused by the fact that the leakage fault is not released and the switch-on energization is mistakenly switched on can be avoided.

Referring to fig. 1 and 2, the connecting rod 140 further includes a second arm 143, the second arm 143 is connected to the connecting rod body 141, the second arm 143 is provided with a second groove 146, and the button 130 can abut against a groove wall of the second groove 146. With the arrangement, when the circuit is normal and has no leakage fault, the connecting rod 140 can be reliably abutted to the button 130 through the second arm 143, the stability of the connecting rod 140 and the button 130 can be ensured, and the leakage mechanism 100 can be prevented from accidentally moving the linkage shaft 200 to separate the moving contact from the static contact.

Further, referring to fig. 3, the button 130 includes a button body 131 and an abutting portion 132, the abutting portion 132 is connected to the button body 131, the button body 131 is movably disposed on the housing 110, and the elastic arm 150 is in transmission fit with the button body 131; at least a portion of the abutment 132 can extend into the second slot 146 and abut a slot wall of the second slot 146. With this arrangement, the second arm 143 can be reliably brought into contact with the button 130, and the stability of the leakage mechanism 100 in the case where no leakage occurs can be ensured, thereby avoiding an accidental trip.

Still further, the abutting portion 132 is provided with a snap surface 135, and when no leakage fault occurs, at least a part of the abutting portion 132 extends into the second groove 146, and the groove wall of the second groove 146 is in snap contact with the snap surface 135, so that the link 140 and the button 130 can be kept in a relatively stable state.

Optionally, the button body 131 is connected with a clamping column 133, and one end of the button body 131 connected with the clamping column 133 is an abutting surface 136; the elastic arm 150 abuts against the abutting surface 136, and the engaging column 133 is provided with an engaging groove 134 engaged with the second torsion arm 162. With this arrangement, it can be ensured that both the resilient arm 150 and the resilient member are resiliently engaged with the button 130 reliably.

Of course, in other embodiments, button body 131 is provided with a slot 134 that engages with second torque arm 162.

Referring to fig. 1 and 2, the connecting rod 140 further includes a third arm 144, the third arm 144 is connected to the connecting rod body 141, and the release 120 is in transmission fit with the third arm 144; when leakage occurs, the tripper 120 pushes the third arm 144, so that the link body 141 rotates around the assembly shaft 112, and further drives the first arm 142, the second arm 143, and the elastic arm 150 to rotate, thereby ensuring that the button 130 is reliably separated from the second arm 143, and ensuring that the button 130 reliably extends out of the housing 110 under the action of the elastic arm 150 and the elastic member, and the first arm 142 can reliably drive the linkage shaft 200 to move under the action of the elastic member, thereby ensuring that the movable contact is reliably separated from the fixed contact, i.e., ensuring the reliability of leakage tripping.

The structure and the working principle of the trip device 120 are similar to those of the related art, please refer to fig. 4, which includes a coil 121, a spring 122, a bracket 123, a movable iron core 124, a stationary iron core 125 and a push rod 126, wherein the bracket 123 is disposed on the housing 110, the coil 121 is wound on the bracket 123, the movable iron core 124 and the push rod 126 are both movably disposed on the bracket 123, the push rod 126 can extend and retract relative to the bracket 123, and the push rod 126 is in transmission fit with the connecting rod 140; the static iron core 125 is fixedly arranged on the bracket 123, and the spring 122 is arranged between the top rod 126 and the static iron core 125 and used for enabling the top rod 126 to always have a movement tendency of retracting into the bracket 123; specifically, when electric leakage occurs, the coil 121 generates a magnetic field, the movable iron core 124 is close to the static iron core 125 and the ejector rod 126 extends out of the bracket 123, and the ejector rod 126 pushes the connecting rod 140 to rotate, so that the connecting rod 140 can drive the idle opening mechanism to trip; after tripping, the circuit is broken, the plunger 124 and ram 126 move under the action of the spring 122, and the ram 126 retracts into the bracket 123.

It should be noted that the button 130 may extend upward out of the housing 110, the top bar 126 of the trip unit 120 is configured to extend obliquely downward to drive the connecting rod 140 to rotate, and the direction in which the top bar 126 extends out of the bracket 123 forms an acute angle with the direction in which the button 130 extends out of the housing 110; therefore, the release 120 can reliably drive the connecting rod 140 to rotate to be separated from the button 130, and after the two are separated, the button 130 can continue to rotate to push the linkage shaft 200 to move under the action of the elastic element, so that the movable contact is separated from the fixed contact.

The open state (as shown in fig. 1) of the circuit breaker 010 of the present embodiment in the case of no leakage includes: the handle 210 rotates to the opening position, the moving contact is separated from the fixed contact, and the linkage shaft 200 is located at the first end of the avoidance hole 111 and separated from the first arm 142 of the connecting rod 140; the second arm 143 overlaps the button 130; the button 130 is arranged in the shell 110, and under the action of the shell 110, the connecting rod 140 and the elastic element, the button 130 is in a balanced state; a gap is formed between the abutting piece 147 and the second torque arm 162, the connecting rod 140 is in a balanced state under the action of the button 130, and the elastic arm 150 is extruded and is lower on the button 130; the top bar 126 of the trip unit 120 is within the bracket 123.

The closed state of the circuit breaker 010 (as shown in fig. 5) includes: when the handle 210 rotates to the switching-on position, the moving contact contacts with the fixed contact, and the linkage shaft 200 moves to the second end of the avoidance hole 111 and forms a gap or contact with the first arm 142; the state of the leakage mechanism 100 is maintained in accordance with the opening state described above.

Referring to fig. 6 and 7, the open state of the circuit breaker 010 during leakage includes: the top rod 126 of the release 120 extends out of the bracket 123 and applies force to the third arm 144 to push the connecting rod 140 to rotate counterclockwise in fig. 6; the second arm 143 is disengaged (tripped) from the button 130; under the action of the elastic member and the elastic arm 150, the button 130 moves in a direction extending out of the housing 110; the elastic member can abut against the abutting member 147, so that the connecting rod 140 is continuously driven to rotate counterclockwise under the action of the elastic member until the linkage shaft 200 is driven to move towards the first end of the avoidance hole 111, the linkage shaft 200 drives the moving contact to be separated from the fixed contact, the circuit is cut off, meanwhile, the handle 210 returns to the brake separating position, and the button 130 extends out of the housing 110 under the action of the elastic arm 150. After the circuit is broken, the voltage across the trip unit 120 disappears and the ram 126 retracts into the cradle 123 under the action of the spring 122.

After the electric leakage fault is eliminated, the switching-on process comprises the following steps: the button 130 is pressed to retract into the housing 110, and the handle 210 is rotated to the switching-on position, so that the movable contact is driven to contact with the fixed contact, and the linkage shaft 200 returns to the second end of the avoidance hole 111.

To sum up, the utility model discloses a structure simplification of electric leakage mechanism 100 for electric leakage mechanism 100 and circuit breaker 010 assemble more easily, and can improve production efficiency.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (10)

1. An electric leakage mechanism for a circuit breaker, the electric leakage mechanism comprising:

a housing (110);

a release (120), the release (120) disposed on the housing (110);

a button (130), the button (130) being movably disposed on the housing (110) and being capable of extending or retracting relative to the housing (110);

a connecting rod (140), wherein the connecting rod (140) is rotatably arranged on the shell (110) and can be abutted against or separated from the button (130); the release (120) is in transmission fit with the connecting rod (140) and is used for driving the connecting rod (140) to be separated from the button (130); the connecting rod (140) can be in transmission fit with an air opening mechanism of the circuit breaker;

the elastic arm (150), the elastic arm (150) is connected with the connecting rod (140) and is propped against the button (130); wherein the content of the first and second substances,

when the release (120) drives the connecting rod (140) to rotate to be separated from the button (130), the elastic arm (150) can drive the button (130) to extend out of the shell (110).

2. The leakage mechanism of claim 1, further comprising an elastic member disposed in the housing (110) and capable of being in driving engagement with the button (130) and the link (140); when the tripper (120) drives the connecting rod (140) to rotate to be separated from the button (130), the button (130) can extend relative to the shell (110) under the combined action of the elastic piece and the elastic arm (150), and the elastic piece can drive the connecting rod (140) to trip the idle opening mechanism.

3. A leakage mechanism according to claim 2, wherein the resilient member is a torsion spring (160), a first torsion arm (161) of the torsion spring (160) being connected to the housing (110), and a second torsion arm (162) of the torsion spring (160) being connected to the button (130) and being capable of cooperating with the link (140).

4. A leakage mechanism according to claim 3, wherein the button (130) is provided with a latching slot (134), and the second torsion arm (162) is latched with the latching slot (134).

5. The residual current device according to claim 2, wherein the connecting rod (140) comprises a connecting rod body (141) and a first arm (142), the connecting rod body (141) is rotatably arranged on the housing (110), the elastic arm (150) and the first arm (142) are both connected with the connecting rod body (141), and the elastic member can be in transmission fit with the first arm (142) so that the first arm (142) can drive the idle opening mechanism to trip under the action of the elastic member.

6. The leakage mechanism of claim 5, wherein the link (140) further comprises an abutment member (147), the abutment member (147) is connected to the first arm (142), and the resilient member is capable of abutting against the abutment member (147) to drive the first arm (142) to trip the mechanism.

7. The leakage mechanism according to claim 5, wherein the housing (110) is provided with an avoiding hole (111), and the avoiding hole (111) is used for penetrating through a linkage shaft (200) of the idle opening mechanism; one end, far away from the connecting rod body (141), of the first arm (142) is provided with a first groove (145), and the groove wall of the first groove (145) can be abutted to the linkage shaft (200).

8. The leakage mechanism according to claim 1, wherein the link (140) comprises a link body (141) and a second arm (143), the link body (141) is rotatably disposed on the housing (110), the elastic arm (150) and the second arm (143) are both connected with the link body (141), the second arm (143) is provided with a second groove (146), and the button (130) can abut against a groove wall of the second groove (146).

9. A leakage mechanism according to claim 8, wherein the button (130) comprises a button body (131) and an abutting portion (132), the abutting portion (132) is connected to the button body (131), the button body (131) is movably disposed on the housing (110), and the elastic arm (150) is in transmission fit with the button body (131); at least part of the abutment portion (132) is capable of extending into the second slot (146) and abutting a slot wall of the second slot (146).

10. A circuit breaker comprising an electrical leakage mechanism according to any one of claims 1 to 9.

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