CN210296253U - Electric leakage test structure and circuit breaker - Google Patents

Abstract

The utility model provides an electric leakage test structure and circuit breaker, wherein, electric leakage test structure includes: the conductive piece is arranged on the shell and is electrically connected with the circuit board; and the movable contact piece is electrically connected with the circuit board and is linked with the test button, the movable contact piece is contacted with or disconnected from the conductive piece when acting, and when the movable contact piece is contacted with the conductive piece, the electric leakage test loop where the movable contact piece is positioned is conducted. The inventor ingeniously utilizes the existing conductive piece of the circuit breaker to match with the movable contact piece, compared with the mode that a static spring needs to be arranged in the prior art, the circuit breaker has the advantages of simpler structure, rapidness and convenience in assembly and reduction in production cost.

Description

Electric leakage test structure and circuit breaker

Technical Field

The utility model relates to a leakage circuit breaker technical field, concretely relates to electric leakage test structure and circuit breaker.

Background

The leakage breaker is an electric appliance safety device which can quickly cut off the power supply when the leakage occurs to prevent the occurrence of electric shock accidents. The residual current circuit breaker comprises a residual current testing structure, and the residual current testing structure of the residual current circuit breaker is definitely specified in an installation and use specification GB13955 to be pressed once per month so as to determine whether a residual current protection device of the residual current circuit breaker can work normally.

The electric leakage test structure generally comprises a test button, a pressure spring for providing reset biasing force for the test button, a movable reed positioned below the test button and a static reed opposite to the movable reed, wherein the movable reed and the static reed are respectively and electrically connected with a circuit board through a lead; after the test is finished, the test button is removed from being pressed, and the test button can reset under the action of the pressure spring. Because the electric leakage test structure comprises the test button, the pressure spring, the movable spring leaf, the static spring leaf and the lead, the number of structural components is large, the assembly process is complex, and the production cost is increased.

SUMMERY OF THE UTILITY MODEL

Therefore, the to-be-solved technical problem of the utility model lies in overcoming the electric leakage among the prior art and testing the defect that structural component is many, assembly process is complicated, manufacturing cost is high to provide a simple structure, assembly process is simple, low in production cost's electric leakage test structure, and have this electric leakage test structure's circuit breaker.

Therefore, the utility model provides an electric leakage test structure, which comprises a conductive piece and a movable contact piece, wherein the conductive piece is arranged on the shell and is electrically connected with a circuit board; the movable contact piece is electrically connected with the circuit board, the movable contact piece is arranged in linkage with the test button, the movable contact piece is contacted with or disconnected from the conductive piece when acting, and when the movable contact piece is contacted with the conductive piece, a leakage test loop where the movable contact piece is positioned is conducted

The conductive piece is a magnetic yoke of the short circuit tripping mechanism, and the magnetic yoke is electrically connected with the circuit board through a lead.

The circuit board is provided with a first connecting piece connected with the movable contact piece, and the movable contact piece is provided with an elastic connecting part which is connected with the copper column in an adaptive manner.

The first connecting piece is a copper column.

The movable contact piece comprises a fulcrum part positioned in the middle of the movable contact piece, and an elastic connecting part and an elastic matching part which are partially arranged at two ends of the fulcrum part, the fulcrum part abuts against the supporting block on the shell, the elastic matching part can be abutted against the test button to generate elastic deformation, and when the elastic matching part resets, the test button is pushed to recover to an initial position.

The supporting block is in an arc shape, and the contact surface of the supporting block and the supporting point is an arc surface matched with the arc-shaped supporting point.

The test button comprises a button part extending out of the shell, a driving part abutting against the elastic matching part and a connecting block connecting the button part and the driving part, the button part and the driving part are arranged at two ends of the connecting block, and the driving part is close to the shell side plate.

The utility model provides a circuit breaker, include as above electric leakage test structure.

The utility model discloses technical scheme has following advantage:

1. the utility model provides an electric leakage test structure, including electrically conductive piece and movable contact spare, when movable contact spare and electrically conductive contact, the electric leakage test return circuit at movable contact spare place switched on, and the inventor is ingenious has utilized the existing electrically conductive piece of circuit breaker, makes its and movable contact spare cooperation, compares with the mode that prior art needs to set up the stationary contact spring, and the structure is simpler, and the assembly is swiftly convenient, has reduced manufacturing cost.

2. The utility model provides a leakage test structure is provided with the first connecting piece that links to each other with the movable contact piece on the circuit board, and first connecting piece is the copper post, is equipped with the elastic connection portion of being connected with copper post adaptation on the movable contact piece, because the elastic connection portion of movable contact piece adopts the mode and the copper post of pegging graft to be connected, assembles swiftly and conveniently like this, has saved the connecting wire between movable contact piece and the circuit board simultaneously, has further reduced manufacturing cost.

3. The utility model provides an electric leakage test structure, movable contact spare are including the fulcrum portion that is located its middle part to and the elastic connection portion and the elastic fit portion at fulcrum portion both ends are located to the part, and when elastic fit portion reset, promote test button and resume to initial position, also reset of test button is the elasticity with the help of movable contact spare elastic fit portion self, thereby need not to install the reset spring that drive test button resets again, further reduced manufacturing cost.

4. The utility model provides an electric leakage test structure, fulcrum portion are the arc, the supporting shoe with the contact surface of fulcrum portion be with the cambered surface of arc fulcrum portion adaptation, adopt the cooperation mode of cambered surface for fulcrum portion is difficult for the rupture, has prolonged the life of movable contact spare.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the technical solutions in the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a front view of the leakage testing structure of the present invention;

FIG. 2 is an enlarged schematic view of portion A of FIG. 1;

FIG. 3 is a schematic structural view of a test button and a movable contact;

fig. 4 is a schematic structural view of a yoke and a coil of the short circuit trip mechanism;

FIG. 5 is an exploded view of the yoke and coil;

fig. 6 is a perspective view of the circuit breaker.

Description of reference numerals: 1. a conductive member; 2. a housing; 21. a support block; 3. a circuit board; 31. a copper pillar; 4. a movable contact member; 41. an elastic connection portion; 42. a fulcrum section; 43. an elastic fitting portion; 5. a test button; 51. a button portion; 52. a drive section; 53. connecting blocks; 6. a wire; 7. and a coil.

Detailed Description

The technical solution of the present invention will be described clearly and completely with reference to the accompanying drawings, and obviously, the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed 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.

Furthermore, the technical features mentioned in the different embodiments of the invention described below can be combined with each other as long as they do not conflict with each other.

Examples

The present embodiment provides a circuit breaker, as shown in fig. 1,2 and 6, including an electric leakage testing structure, where the electric leakage testing structure includes a conductive member 1, a movable contact member 4 and a testing button 5.

The conductive member 1 is disposed on the housing 2 and electrically connected to the circuit board 3, and in this embodiment, as shown in fig. 2,4 and 5, the conductive member 1 is a magnetic yoke of a short circuit trip mechanism (the short circuit trip mechanism is a mature technology, and therefore, the internal structure and the working principle of the short circuit trip mechanism are not described in detail), the magnetic yoke is welded to the coil 7, and the magnetic yoke is electrically connected to the circuit board 3 through a wire 6.

The movable contact member 4, which is of a rocker structure, as shown in fig. 2 and 3, includes a fulcrum portion 42 located in the middle, and an elastic connection portion 41 and an elastic engagement portion 43 respectively disposed at two ends of the fulcrum portion 42. The top of the fulcrum portion 42 abuts against the inner wall of the housing 2, and the bottom abuts against the supporting block 21 on the housing 2, in this embodiment, the fulcrum portion 42 is an arc, and a contact surface between the supporting block 21 and the fulcrum portion 42 is an arc surface adapted to the arc fulcrum portion 42. The elastic matching part 43 can be abutted against the test button 5 to generate elastic deformation, when the elastic matching part 43 is reset, the test button 5 is pushed to restore to an initial position, the circuit board 3 is provided with a first connecting piece connected with the movable contact piece 4, in the embodiment, the first connecting piece is a copper column 31, the movable contact piece 4 is provided with an elastic connecting part 41 which is in adaptive connection with the copper column 31, and during assembly, the copper column 31 is correspondingly inserted into a jack of the elastic connecting part 41. In this embodiment, the movable contact 4 is made of a spring plate.

The test button 5 comprises a button part 51 extending out of the shell 2, a driving part 52 abutting against the elastic matching part 43 and a connecting block 53 connecting the button part 51 and the driving part 52, the button part 51 and the driving part 52 are arranged at two ends of the connecting block 53, the driving part 52 is close to a side plate of the shell 2, so that the button part 51 cannot interfere with the rotation of a handle of the circuit breaker, and in addition, the connecting block 53 can be matched with the inner wall of the top of the shell 2 to block the test button 5 so as to prevent the test button 5 from falling out of the shell 2.

As an alternative embodiment, the conducting element 1 can also be the coil 7 of the short-circuit tripping mechanism.

As an alternative embodiment, one end of the movable contact 4 may be soldered to the copper post 31 of the circuit board 3.

The utility model discloses an electric leakage test structure, including electrically conductive piece 1 and movable contact member 4, when movable contact member 4 contacted with electrically conductive piece 1, the electric leakage test return circuit at movable contact member 4 place switched on, and the ingenious utilization of the inventor has had short circuit tripping device's yoke as conductive element in the circuit breaker, made its and movable contact member 4 cooperation, compared with the mode that prior art need set up the stationary contact spring, the structure is simpler, and the assembly is swiftly convenient, has reduced manufacturing cost.

The working principle of the leakage test structure of the embodiment is as follows:

during testing, the test button 5 is manually pressed, the driving part 52 of the test button 5 drives the elastic matching part 43 of the movable contact piece 4 to be in contact with the conductive piece 1, so that a leakage test loop where the movable contact piece 4 is located is conducted, and a leakage release acts to drive the breaker to open; after the test is completed, the test button 5 is released from being pressed, and the test button 5 is reset by the elastic fitting portion 43 of the movable contact 4.

It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications can be made without departing from the scope of the invention.

Claims (8)

1. An electrical leakage test structure, comprising:

the conductive piece (1) is arranged on the shell (2) and is electrically connected with the circuit board (3);

the movable contact piece (4) is electrically connected with the circuit board (3), the movable contact piece (4) and the test button (5) are arranged in a linkage mode, the movable contact piece (4) is in contact with or disconnected from the conductive piece (1) when acting, and when the movable contact piece (4) is in contact with the conductive piece (1), a leakage test loop where the movable contact piece (4) is located is conducted.

2. The electrical leakage test structure according to claim 1, wherein the conductive member (1) is a yoke of a short circuit trip mechanism, and the yoke is electrically connected to the circuit board (3) through a wire (6).

3. An electric leakage test structure according to claim 1 or 2, characterized in that a first connecting piece connected with the movable contact piece (4) is arranged on the circuit board (3), and an elastic connecting part (41) adapted to be connected with the first connecting piece is arranged on the movable contact piece (4).

4. Electrical leakage test structure according to claim 3, characterized in that said first connection member is a copper pillar (31).

5. The electric leakage test structure according to claim 4, wherein the movable contact member (4) comprises a fulcrum portion (42) located at a middle portion thereof, and an elastic connection portion (41) and an elastic engagement portion (43) respectively disposed at two ends of the fulcrum portion (42), the fulcrum portion (42) abuts against a support block (21) on the housing (2), the elastic engagement portion (43) can be elastically deformed by abutting against the test button (5), and the elastic engagement portion (43) pushes the test button (5) to return to an initial position when being reset.

6. The electrical leakage test structure according to claim 5, wherein the fulcrum portion (42) is arc-shaped, and a contact surface of the support block (21) with the fulcrum portion (42) is arc-shaped adapted to the arc-shaped fulcrum portion (42).

7. The electrical leakage test structure according to claim 6, wherein the test button (5) comprises a button portion (51) provided to protrude from the housing (2), a driving portion (52) abutting against the elastic fitting portion (43), and a connecting block (53) connecting the button portion (51) and the driving portion (52), the button portion (51) and the driving portion (52) being provided at both ends of the connecting block (53), the driving portion (52) being provided near a side plate of the housing (2).

8. A circuit breaker comprising a residual current test structure according to any one of claims 1 to 7.

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