CN219917049U - Delay release and circuit breaker - Google Patents

Abstract

The time-delay release comprises a coil framework, wherein a static iron core and a movable iron core are arranged in a cavity of the coil framework, the movable iron core slides to be close to or far away from the static iron core to drive a push rod to move, a limiting part is arranged in the cavity between the movable iron core and the static iron core, a first elastic piece is arranged between the movable iron core and the limiting part, a moving piece is arranged between the limiting part and the static iron core in a sliding manner, a second elastic piece is arranged between the moving piece and the static iron core, a driving part for driving the moving piece is arranged on the push rod, a gap is reserved between the driving part and the moving piece, and the moving piece is positioned on a moving track of the driving part. According to the time delay release and the circuit breaker, the coil drives the movable iron core to overcome the elasticity of the first elastic piece to accelerate and slide to the static iron core, and then the movable iron core is matched with the second elastic piece to accelerate and slide to the static iron core, so that the time delay extension of the push rod is realized, short time delay action can be realized when the time delay release and the circuit breaker are applied to the circuit breaker, and the time delay release and the circuit breaker have the advantages of simple structure, small occupied space and high reliability.

Description

Delay release and circuit breaker

Technical Field

The utility model relates to the field of piezoelectric devices, in particular to a delay release and a circuit breaker.

Background

A circuit breaker is widely used in a low voltage distribution system as a device for protecting a power supply circuit. In general, a circuit breaker is composed of a contact system, an arc extinguishing system, an operating mechanism and an overcurrent protection device, under normal working conditions, the operating mechanism keeps the contact system closed or opened through a connecting rod transmission mechanism to connect and disconnect a power line, when an overcurrent fault occurs, the overcurrent protection device acts to trip the operating mechanism to rapidly cut off the overcurrent, wherein the most common structures for overcurrent protection are a magnetic trip device and a thermal trip device.

In a terminal power distribution system, a user generally sets a multi-stage breaker for protection, when fault current occurs at a load side, and the fault short-circuit current exceeds a short-circuit instantaneous action value of a lower-stage breaker, and simultaneously exceeds a short-circuit instantaneous action value of an upper-stage breaker, the condition that the upper-stage breaker and the lower-stage breaker trip simultaneously (namely, override trip) occurs can be caused, and in order to solve the override trip phenomenon of the upper-stage breaker and the lower-stage breaker, a short-circuit delay tripping device is generally arranged on the protection breaker, however, the short-circuit delay tripping device with a selective protection breaker is divided into an electronic type and a mechanical type at present, and the electronic type tripping device has the defects of higher cost, larger volume and the like, and the mechanical type has the defects of complex structure, poor stability and the like.

Disclosure of Invention

The utility model aims to overcome at least one defect of the prior art and provides a time delay release and a circuit breaker which are simple in structure and high in reliability.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

the time-delay release comprises a coil framework, a coil is wound on the outer side of the coil framework, a static iron core and a movable iron core are arranged in a cavity of the coil framework, the movable iron core can slide close to or far away from the static iron core to drive a push rod connected with the movable iron core to move,

the device comprises a movable iron core, a fixed iron core, a push rod, a first elastic piece, a second elastic piece, a driving part, a gap between the driving part and the moving piece, and a moving track of the driving part.

Further, the limit part is a boss structure protruding around the inner side wall of the cavity, the limit part divides the cavity into a first cavity and a second cavity which are communicated with each other along the axial direction, the movable iron core and the movable piece are respectively arranged in the first cavity and the second cavity in a sliding mode, the first elastic piece is arranged in the first cavity, one end of the first elastic piece acts on the limit part, the other end of the first elastic piece acts on the movable iron core or the push rod, the second elastic piece is arranged in the second cavity, and the push rod penetrates through the first cavity and the second cavity.

Further, one end of the moving piece, which is close to the static iron core, is in sliding connection with the static iron core.

Further, the moving part is sleeved on the outer side of the push rod, and one end, close to the static iron core, of the moving part and the push rod slide together to pass through the static iron core.

Further, the first end of the push rod is inserted into the movable iron core, and the second end of the push rod penetrates through the static iron core.

Further, the outside protrusion of push rod is equipped with drive division, drive division is close to the movable iron core and can pass spacing portion and moving part butt.

Further, the driving part is located at the first end part of the push rod, the movable iron core is provided with a plug-in part in a protruding mode, and the driving part is provided with a slot matched with the plug-in part.

Further, the driving part is positioned in the middle of the push rod, and the first end of the push rod is limited to penetrate through the movable iron core.

Further, the moving part comprises a driving plate, a matching hole for the push rod to pass through is formed in the middle of the driving plate, the edge of the matching hole protrudes outwards along the axial direction to form a hollow cylinder part, and the hollow cylinder part is in sliding connection with the static iron core.

Further, the moving member is made of a non-magnetically conductive metallic material or a non-metallic material.

The utility model also provides a circuit breaker comprising the time-delay release.

The utility model also provides a circuit breaker comprising two circuit breaker poles in series, one of the circuit breaker poles being equipped with a time delay release as described above, the other circuit breaker pole being equipped with an electromagnetic instantaneous release, at least one of the circuit breaker poles being equipped with an overload release.

According to the time delay release and the circuit breaker, the coil drives the movable iron core to overcome the elasticity of the first elastic piece to accelerate and slide to the static iron core, and then the movable iron core is matched with the second elastic piece to accelerate and slide to the static iron core, so that the time delay extension of the push rod is realized, short time delay action can be realized when the time delay release and the circuit breaker are applied to the circuit breaker, and the time delay release and the circuit breaker have the advantages of simple structure, small occupied space and high reliability.

In addition, one end of the moving part is in sliding connection with the static iron core, so that a guiding effect is provided for the sliding of the moving part, and the overall matching stability is improved.

In addition, the driving part of the push rod is in driving fit with the moving part, so that the stability of the fit of the push rod and the moving part is improved.

In addition, move iron core and push rod grafting cooperation, wherein, move iron core and push rod through the tip grafting, do benefit to the length that shortens the push rod, the spacing grafting mode that runs through to move the iron core of push rod does benefit to the stability of connection that moves iron core and push rod.

In addition, the limiting part divides the cavity into a first cavity and a second cavity which are axially communicated, so that the movable iron core and the movable piece are respectively and slidably assembled in the first cavity and the second cavity, and mutual interference is avoided.

Drawings

FIG. 1 is a cross-sectional view of a time delay release of the present utility model (first embodiment);

FIG. 2 is a cross-sectional view of a time delay release of the present utility model (second embodiment);

FIG. 3 is a cross-sectional view of a coil bobbin of the present utility model;

FIG. 4 is a cross-sectional view of a displacement member according to the present utility model;

reference numerals:

1-magnetic yoke, 2-coil framework, 21-limit part, 2 a-first chamber, 2 b-second chamber, 3-coil,

the device comprises a 4-movable iron core, a 41-plug-in part, a 5-static iron core, a 6-push rod, a 61-driving part, a 62-slot, a 7-moving part, a 71-driving plate, a 72-hollow cylinder part, an 8-first elastic part and a 9-second elastic part.

Detailed Description

Specific embodiments of the delay release and circuit breaker of the present utility model are further described below with reference to the examples shown in the drawings. The time delay release and the circuit breaker of the present utility model are not limited to the description of the following embodiments.

The circuit breaker of the embodiment comprises at least one circuit breaker pole, each circuit breaker pole comprises a pair of wiring terminals, a handle mechanism, an operating mechanism and a contact mechanism are arranged between the pair of wiring terminals, the contact mechanism comprises a moving contact and a fixed contact which are matched with each other, the moving contact and the fixed contact are respectively and electrically connected with the pair of wiring terminals, the handle mechanism, the operating mechanism and the moving contact are sequentially connected in a linkage way, and the operating handle mechanism can drive the moving contact to contact with or separate from the fixed contact, so that the switching-on and switching-off of the circuit breaker pole can be realized; the adjacent two circuit breaker poles are connected in a linkage way, namely the handle mechanisms and/or the operating mechanisms and/or the moving contacts of the adjacent two circuit breakers are respectively connected in a linkage way.

Furthermore, each breaker pole is also provided with a protection mechanism matched with the operating mechanism, the protection mechanism comprises a short-circuit protection mechanism and/or an overload protection mechanism, and when short-circuit or overload faults occur, the short-circuit protection mechanism or the overload protection mechanism triggers the operating mechanism to trip, so that the breaking of the breaker is interrupted.

The improvement point of the utility model is that the short-circuit protection mechanism adopts a delay release, the delay release comprises a coil framework 2, a coil 3 is wound on the outer side of the coil framework 2, a static iron core 5 and a movable iron core 4 are arranged in a cavity of the coil framework 2, the movable iron core 4 can slide to be close to or far from the static iron core 5 and drive a push rod 6 connected with the movable iron core 4 to move, so that the push rod 6 can trigger an operating mechanism to release; a limiting part 21 is arranged in a cavity between the movable iron core 4 and the static iron core 5, a first elastic piece 8 is arranged between the movable iron core 4 and the limiting part 21, a moving piece 7 is arranged between the limiting part 21 and the static iron core 5 in a sliding mode, a second elastic piece 9 is arranged between the moving piece 7 and the static iron core 5, a driving part 61 for driving the moving piece 7 is arranged on the push rod 6, a gap is reserved between the driving part 61 and the moving piece 7, the moving piece 7 is located on a moving track of the driving part 61, the elastic force of the first elastic piece 8 is overcome by the movable iron core 4 to drive the push rod 6 to move, and after the driving part 61 moves through the gap with the driving piece 7, the elastic force of the second elastic piece 9 is overcome by the push rod 6 to move by the driving piece 7.

Under the driving of the coil 3, the movable iron core 4 overcomes the elasticity of the first elastic piece 8 to drive the push rod 6 to slide to the static iron core 5 in an accelerating way, the driving part 61 moves through the gap between the driving piece 7, and then the push rod 6 drives the moving piece 7 to slide to the static iron core 5 to overcome the elasticity of the second elastic piece 9, so that the movable iron core 4 slides to the static iron core 5 in a decelerating way, and the delayed extension of the push rod 6 is realized.

The coil 3 drives the movable iron core 4 to overcome the elasticity of the first elastic piece 8 to accelerate and slide to the static iron core 5, and then the movable piece 7 is matched with the second elastic piece 9 to enable the movable iron core 4 to accelerate and slide to the static iron core 5, so that the delay extension of the push rod 6 is realized, short delay action can be realized when the movable iron core is applied to a circuit breaker, and the movable iron core has the advantages of simple structure, small occupied space and high reliability.

The cavity of the coil skeleton 3 includes a first cavity 2a and a second cavity 2b that are axially disposed, a through hole that is mutually communicated is disposed between the first cavity 2a and the second cavity 2b, a limiting portion 21 is disposed around the through hole, and of course, the cavity of the coil skeleton 3 may be directly separated into the first cavity 2a and the second cavity 2b by the limiting portion 21, at this time, the limiting portion 21 may be a baffle structure that is disposed in the cavity, a through hole is disposed in the middle of the baffle structure, the through hole may allow the push rod 6 and the moving member 7 to pass through, or the limiting portion 21 is a boss that is disposed along an inner side wall of the cavity, the boss structure may be connected along an annular direction of the cavity to form an annular boss, and a height of the annular boss protruding from the inner side wall of the cavity is smaller than a distance from the inner side wall of the cavity to an axle center, so that a center of the annular boss is a hollow area, and the hollow area may be used as a through hole for the push rod 6 to pass through.

The push rod 6 of this embodiment is connected with the movable iron core 4 and passes through the static iron core 5, the movable iron core 4 can drive the push rod 6 to move to extend or retract into the cavity, one end of the first elastic member 8 acts on the limiting part 21, and the other end acts on the movable iron core 4 or the push rod 6. The push rod 6 is provided with a driving portion 61, and preferably, the outer side wall of the push rod 6 near the movable iron core 4 protrudes to form the driving portion 61, and the driving portion 61 can move through the limiting portion 21 along with the push rod 6 to be abutted with the moving member 7, so that the moving member 7 is driven to overcome the elasticity of the second elastic member 9, and the push rod 6 and the moving member 7 are matched more stably.

Further, the end of the moving member 7 close to the static iron core 5 is in sliding connection with the static iron core 5, so that a guiding effect is provided for sliding of the moving member 7, and overall matching stability is improved, preferably, the end of the moving member 7 close to the static iron core 5 can slide together with the push rod 6 to pass through the static iron core 5, so that space is saved, cost is reduced, of course, when the moving member 7 overcomes the elastic force of the second elastic member 9, the moving member 7 can also be abutted against or opposite to the end face of the static iron core 5, but in order to ensure sliding stability of the moving member 7, the outer diameter of the moving member 7 is preferably similar to the inner diameter of the cavity of the coil skeleton 2, so that sliding matching is realized, and the size is not beneficial to reduction; alternatively, the end surface of the stationary core 5 facing the moving member 7 may be provided with a sliding groove matching with the moving member 7, which increases the manufacturing cost.

Further, move iron core 4 and push rod 6 grafting cooperation, move iron core 4 and push rod 6 can peg graft through the tip, so can shorten the length of push rod 6, of course, also can be by the spacing iron core 4 that moves of push rod 6, so can improve the connection stability of moving iron core 4 and push rod 6.

A first embodiment of a time delay release is provided in connection with fig. 1, 3 and 4.

As shown in fig. 1, the time delay release includes a yoke 1 and a coil bobbin 2 assembled on the yoke 1, the coil bobbin 2 is hollow and cylindrical as a whole, a coil 3 is wound on the outer side of the coil bobbin 2, and a hollow portion of the coil bobbin 2 is used as a cavity of the coil bobbin 2 for assembling a stationary core 5, a movable core 4 and a push rod 6.

As shown in fig. 1 and 3, the movable iron core 4 and the static iron core 5 are respectively arranged at two ends of a cavity of the coil framework 2, a limiting part 21 is arranged on the inner side wall of the cavity between the movable iron core 4 and the static iron core 5, preferably, the limiting part 21 is an annular boss structure protruding around the inner side wall of the cavity, the limiting part 21 separates the cavity into a first cavity 2a and a second cavity 2b which are axially communicated, the height of the annular boss structure protruding out of the inner side wall of the cavity is smaller than the distance from the inner side wall of the cavity to the axis, a hollow area is formed in the center of the annular boss structure, the hollow area can serve as a through hole for axially communicating the first cavity 2a and the second cavity 2b, in this embodiment, the movable iron core 4 slides in the first cavity 2a, the static iron core 5 is fixedly arranged at one end of the second cavity 2b far away from the first cavity 2a, a push rod 6 connected to the movable iron core 4 penetrates through the first cavity 2a and the second cavity 2b in the axial direction, when the coil 3 reaches a short-circuit short-time delay/instantaneous setting value, the coil 3 drives the movable iron core 4 along the axial direction of the cavity to the through the axial direction of the cavity to the core 5, the push rod 6 slides towards the outside the movable iron core 5 in the axial direction of the cavity 6, and the push rod 6 is triggered by the axial direction of the push rod 5, and the push rod 6 extends out of the push rod 5 in the axial direction of the release mechanism is far from the cavity 5 along the axial direction of the push rod 5 when the push rod 6 is triggered in the cavity 4 is extended out of the axial direction of the push rod 6.

A moving member 7 is slidably arranged between the limiting part 21 and the static iron core 5, that is, the moving member 7 is slidably assembled in the second chamber 2b, the moving member 7 is driven by the push rod 6, preferably, a matching hole for the push rod 6 to pass through is arranged in the middle of the moving member 7, a boss structure serving as a driving part 61 is convexly arranged on the outer side wall of the push rod 6, the outer diameter of the driving part 61 is larger than the inner diameter of the matching hole, and the driving part 61 can pass through the middle of the limiting part 21 to move in the first chamber 2a and the second chamber 2 b; in this embodiment, the first elastic member 8 and the second elastic member 9 are springs, two ends of the first elastic member 8 are respectively abutted against the movable iron core 4 and the limiting portion 21, two ends of the first elastic member 8 can be respectively abutted against the push rod 6 and the limiting portion 21, for example, the two ends of the second elastic member 9 are respectively abutted against the fixed iron core 5 and the movable iron core 7 at one end where the push rod 6 is connected with the movable iron core 4, the first end of the push rod 6 is connected with the movable iron core 4, the middle part of the push rod 6 sequentially penetrates through the first elastic member 8, the movable member 7 and the second elastic member 9, and the second end of the push rod 6 penetrates through a communication hole extending into the fixed iron core 5 and can extend out of the coil skeleton 2 from the communication hole.

In this embodiment, the push rod 6 may be made of a non-metal material by injection molding, where the first end of the push rod 6 is inserted into the end of the movable iron core 4, so that the length of the push rod 6 is advantageously shortened, as shown in fig. 1, the outer side wall of the first end of the push rod 6 protrudes to form a boss structure as the driving part 61, in the original position, the driving part 61 is located at one end of the first chamber 2a far away from the second chamber 2b, an insertion part 41 is protruding from the first end surface of the movable iron core 4 facing the push rod 6, an insertion slot 62 is formed at one end surface of the driving part 61 facing the movable iron core 4, the insertion slot 62 is inserted into the insertion slot 62 to enable the push rod 6 to be inserted into the movable iron core 4, or the first end of the push rod 6 is inserted into the insertion slot 62, in the process of driving the movable iron core 4 to move towards the static iron core 5 by the coil 3, the movable iron core 4 is accelerated by overcoming the elastic force of the first elastic member 8, and then the movable member 7 is driven by the push rod 6 to slide towards the static iron core 5 to overcome the elastic force of the second elastic member 9, so that the movable iron core 4 is accelerated towards the static iron core 5 to extend out of the cavity 6.

In this embodiment, the moving member 7 is made of a non-magnetic conductive metal material or a non-metal material, as shown in fig. 4, specifically, the moving member 7 includes a driving plate 71, in which the driving plate 71 is circular as a whole, a mating hole through which the push rod 6 passes is formed in the middle of the driving plate 71, the inner diameter of the mating hole is larger than the outer diameter of the rod body of the push rod 6, but smaller than the outer diameter of the driving portion 61, the edge of the mating hole protrudes and extends outwards along the axial direction to form a hollow cylindrical portion 72, the hollow cylindrical portion 72 can be slidably connected with the stationary core 5, in fig. 1 and 4, the outer diameter of the hollow cylindrical portion 72 is smaller than or equal to the inner diameter of the communication hole of the stationary core 5, and as the moving member 7 is driven, the hollow cylindrical portion 72 and the push rod 6 slide together to pass through the communication hole opened in the stationary core 5, and, of course, when the inner diameter of the hollow cylindrical portion 72 is larger than or equal to the outer diameter of the stationary core 5, a connecting slot for inserting one end of the stationary core 5 is left between the second end of the push rod 6 and the inner side wall of the hollow cylindrical portion 72.

In addition, when the axial length of the hollow cylindrical portion 72 is small or only the driving plate 71 is included, at this time, it is preferable that the circumferential outer side wall of the hollow cylindrical portion 72 or the driving plate 71 is in sliding engagement with the inner side wall of the second chamber 2b, and the hollow cylindrical portion 72 or the driving plate 71 is not inserted into the communication hole, that is, when the second elastic member 9 is compressed to the maximum deformation amount, the hollow cylindrical portion 72 is still spaced from the stationary core 5, or the hollow cylindrical portion 72 is in abutment with only the end face of the stationary core 5, or an annular chute is opened at the end face of the stationary core 5, which is engaged with one end of the hollow circular portion.

The working principle of the time delay release is as follows:

when the delay release is at the initial position, the current flowing through the coil 3 does not reach the setting value of short-circuit short-delay action, the electromagnetic driving force of the coil 3 borne by the movable iron core 4 is smaller than the initial pressure of the first elastic piece 8, and the movable iron core 4 does not move; when the current flowing through the coil 3 reaches a short-circuit short-time delay action setting value and is smaller than a short-circuit instantaneous setting value, the electromagnetic driving force born by the movable iron core 4 is larger than the initial pressure of the first elastic piece 8, the movable iron core 4 starts to move, and meanwhile, the push rod 6 is driven to move towards the fixed iron core 5 together until the driving part 61 is contacted with the driving plate 71 of the moving piece 7, and in the process of starting to move until the driving part 61 is contacted with the moving piece 7, the electromagnetic driving force born by the movable iron core 4 is always larger than the counter force of the first elastic piece 8, and the movable iron core 4 accelerates; if the lower-stage circuit breaker fails to trip, after the driving part 61 of the push rod 6 contacts with the moving piece 7, the second elastic piece 9 starts to act, the movable iron core 4 continues to slide to the static iron core 5 and drives the moving piece 7 to continue to move, the second elastic piece 9 continues to be compressed until the second end of the push rod 6 extends out of the cavity of the coil framework 2 to trigger the operating mechanism of the circuit breaker pole to trip, and the circuit breaker is opened; if the lower circuit breaker is tripped, the driving part 61 of the push rod 6 is contacted with the moving part 7 and then continues to move under the inertia action, at the moment, no short-circuit current exists in the circuit, the movable iron core 4 is not subjected to electromagnetic driving force, the speed of the movable iron core 4 is reduced to zero under the counter force action of the first elastic piece 8 and the second elastic piece 9, and the movable iron core 4 moves in the opposite direction under the counter force action of the spring and returns to the initial position.

When the current flowing through the coil 3 reaches the setting value of the short-circuit instantaneous action, the movement path of the movable iron core 4 is consistent with the short delay, and the difference is that the movable iron core 4 is driven to perform acceleration movement all the time because the current flowing through the coil 3 is large until the breaker is opened, when no current exists in the circuit, the movable iron core 4 is not driven by electromagnetic driving force any more, and all parts return to the initial positions.

A second embodiment of a time delay release is provided in connection with fig. 2-4.

The structure of the delay release is similar to that of the first embodiment, the delay release comprises a magnetic yoke 1 and a coil framework 2 arranged on the magnetic yoke 1, a coil 3 is wound on the outer side of the coil framework 2, a limiting part 21 is arranged in a cavity of the coil framework 2, the cavity is divided into a first cavity 2a and a second cavity 2b by the limiting part 21, a movable iron core 4 and a first elastic piece 8 are arranged in the first cavity 2a, two ends of the first elastic piece 8 are respectively abutted with the movable iron core 4 and the limiting part 21, and a static iron core 5 and a movable piece 7 which are the same as those of the first embodiment are arranged in the second cavity 2 b.

Unlike the first embodiment, in the present embodiment, a boss structure as the driving portion 61 is formed to protrude from the middle outer side wall of the push rod 6, and the driving portion 61 is movable in the first chamber 2a, the second chamber 2b through the stopper portion 21 for driving the mover 7; a through hole is provided in the middle of the plunger 4, and the first end of the push rod 6 is limited to penetrate the through hole of the plunger 4, preferably, as shown in fig. 2, a blocking portion is formed by protruding the first end of the push rod 6, and the plunger 4 is limited to the push rod 6 between the driving portion 61 and the blocking portion. In addition, the movable iron core 4 and the push rod 6 may be fixedly connected by hot riveting or other methods.

The circuit breaker comprises two circuit breaker poles connected in series, wherein a delay release in the embodiment is assembled in one circuit breaker pole, a magnet yoke 1 of the delay release and a fixed contact of the circuit breaker pole are connected to the same wiring terminal, and an electromagnetic instantaneous release and a thermal overload release are assembled in the other circuit breaker pole, so that the circuit breaker has the functions of short circuit instantaneous, short circuit short time delay and overload long time delay protection; or, the electromagnetic instantaneous trip is arranged in one breaker pole, and the time delay trip and the thermal overload trip are arranged in the other breaker pole, so that the whole breaker has the functions of short circuit instantaneous, short circuit and short time delay and overload long time delay protection.

It should be noted that, in the description of the present utility model, the terms "upper", "lower", "left", "right", "inner", "outer", and the like indicate an orientation or a positional relationship based on that shown in the drawings or an orientation or a positional relationship conventionally put in use, and are merely for convenience of description, and do not indicate that the apparatus or element to be referred to must have a specific orientation, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," "third," and the like are used merely to distinguish between descriptions and should not be construed as indicating relative importance.

The foregoing is a further detailed description of the utility model in connection with the preferred embodiments, and it is not intended that the utility model be limited to the specific embodiments described. It will be apparent to those skilled in the art that several simple deductions or substitutions may be made without departing from the spirit of the utility model, and these should be considered to be within the scope of the utility model.

Claims (12)

1. The utility model provides a time delay release, includes coil skeleton (2) coil (3) are twined in the outside of coil skeleton (2), be provided with quiet iron core (5) in the cavity of coil skeleton (2) and move iron core (4), move iron core (4) and can slide and be close to or keep away from quiet iron core (5) drive and move push rod (6) that iron core (4) are connected, its characterized in that:

a limiting part (21) is arranged in a cavity between the movable iron core (4) and the static iron core (5), a first elastic piece (8) is arranged between the movable iron core (4) and the limiting part (21), a moving piece (7) is arranged between the limiting part (21) and the static iron core (5) in a sliding way, a second elastic piece (9) is arranged between the moving piece (7) and the static iron core (5),

the push rod (6) is provided with a driving part (61) for driving the moving member (7), a gap is formed between the driving part (61) and the moving member (7), and the moving member (7) is positioned on the moving track of the driving part (61).

2. The delay release of claim 1 wherein: the utility model discloses a motor, including cavity, spacing portion (21), first cavity (2 a) and second cavity (2 b) that spacing portion (21) set up for encircling the protrusion of cavity inner wall, spacing portion (21) cut apart the cavity into along axial intercommunication, move iron core (4), moving part (7) and slide respectively and set up in first cavity (2 a), in second cavity (2 b), first elastic component (8) set up in first cavity (2 a), first elastic component (8) one end acts on spacing portion (21), the other end acts on and moves iron core (4) or push rod (6), second elastic component (9) set up in second cavity (2 b), push rod (6) run through first cavity (2 a) and second cavity (2 b).

3. The delay release of claim 1 wherein: one end of the moving piece (7) close to the static iron core (5) is in sliding connection with the static iron core (5).

4. The time delay release of claim 3 wherein: the movable piece (7) is sleeved on the outer side of the push rod (6), and one end, close to the static iron core (5), of the movable piece (7) and the push rod (6) slide together to pass through the static iron core (5).

5. The delay release of claim 1 wherein: the first end of the push rod (6) is inserted into the movable iron core (4), and the second end of the push rod (6) penetrates through the static iron core (5).

6. The delay release of claim 1 wherein: the outside protrusion of push rod (6) is equipped with drive division (61), drive division (61) are close to movable iron core (4) and can pass spacing portion (21) and move piece (7) butt.

7. The delay release of claim 6 wherein: the driving part (61) is positioned at the first end part of the push rod (6), the movable iron core (4) is convexly provided with the plug-in part (41), and the driving part (61) is provided with a slot (62) matched with the plug-in part (41).

8. The delay release of claim 6 wherein: the driving part (61) is positioned in the middle of the push rod (6), and the first end of the push rod (6) is limited to penetrate through the movable iron core (4).

9. The delay release of claim 1 wherein: the moving part (7) comprises a driving plate (71), a matching hole for a push rod (6) to pass through is formed in the middle of the driving plate (71), the edge of the matching hole protrudes outwards along the axial direction to extend to form a hollow cylinder part (72), and the hollow cylinder part (72) is in sliding connection with the static iron core (5).

10. The delay release of claim 1 wherein: the moving part (7) is made of a non-magnetic metal material or a non-metal material.

11. The circuit breaker, its characterized in that: comprising a time delay release according to any of claims 1-10.

12. The circuit breaker, including two circuit breaker poles of establishing ties, its characterized in that: one of the circuit breaker poles is equipped with a time delay release according to any of claims 1-10 and the other circuit breaker pole is equipped with an electromagnetic instantaneous release, at least one of the circuit breaker poles being equipped with an overload release.