CN215266952U - Movable residual current protection plug - Google Patents

Abstract

The utility model relates to a portable residual current protection plug, including casing and reset button, test button, residual current electromagnetic actuating mechanism, residual current detection circuit and contact state indicating mechanism, contact state indicating mechanism includes the indicator and sets up the observation window on last casing, the indicator has an indicator lever, the indicator is with a pair of the free end fixed connection of metal elasticity reed forms the linkage, makes the stationary contact and movable contact are under closed and disconnected two states, the terminal surface of indicator lever is in respectively with the observation window relative and skew state to can show the state and simple structure, small of inside contact, accord with the safety standard requirement.

Description

Movable residual current protection plug

Technical Field

The utility model relates to a power plug with residual current protection specifically is a portable residual current protection plug.

Background

The movable residual current protection plug not only can provide power for various electrical appliances or equipment, but also can play a role in protecting when a human body gets an electric shock or the residual current of the electrical appliances and the equipment, and is not fixedly arranged on a wall surface, so that the movable residual current protection plug is very widely applied.

A mobile residual current protection plug generally includes a housing, a residual current electromagnetic actuating mechanism and a residual current detection circuit are disposed in the housing, a terminal post is disposed in the housing, and a pair of pins is disposed outside the housing. The residual current electromagnetic action mechanism generally comprises a movable contact component, a fixed contact component, an electromagnetic coil, a movable iron core and a reset button, wherein a tripping linkage mechanism is arranged between the movable contact component and the movable iron core, the tripping linkage mechanism drives a movable contact of the movable contact component and a fixed contact of the fixed contact component to be closed under the reset action of the reset button, when a human body electric shock or equipment electric leakage condition occurs, a residual current detection circuit outputs a control signal, the electromagnetic coil is powered off, the movable iron core is released, the movable iron core enables the movable contact of the movable contact component and the fixed contact of the fixed contact component to be separated through the tripping linkage mechanism, and the purpose of protecting is achieved by cutting off a power supply. In addition, when the power supply voltage is too low or the external power supply is powered off, the electromagnetic intensity generated by the electromagnetic coil is not enough to attract the movable iron core, and the movable iron core also causes the movable iron core to separate the movable contact of the movable contact component from the fixed contact of the fixed contact component through the tripping linkage mechanism, so that the power supply is cut off.

The design and mechanism of the existing mobile residual current protection plug have special requirements that the performance of the plug is reliable when the plug is used normally, and the plug cannot harm a user or the surrounding environment even if the power supply voltage fails or the neutral line is disconnected. In addition, the mobile residual current protection plug is required to have a mechanical mechanism capable of displaying the state of the internal contact, so that the safety is further improved.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to overcome prior art not enough and provide a residual current electromagnetic actuating mechanism that can show the state of inside contact and simple structure, small.

In order to achieve the above purpose, the utility model adopts the following scheme: a mobile residual current protection plug comprises a shell, a reset button, a test button, a residual current electromagnetic action mechanism and a residual current detection circuit; the residual current electromagnetic action mechanism comprises a pair of movable contact assemblies, a pair of fixed contact assemblies and an electromagnetic assembly, the pair of movable contact assemblies are symmetrically and respectively arranged at two sides of the electromagnetic coil, each movable contact assembly comprises a metal elastic reed and a movable contact, one end of each metal elastic reed is fixedly arranged, the other end of each metal elastic reed is a free end, and the movable contact is fixedly arranged at the free end; the utility model discloses a test device, including casing, stationary contact and movable contact, last casing is equipped with reset button hole and test button hole, reset button and test button pass reset button hole and test button hole and expose its characterized in that: the contact state indicating mechanism comprises an indicating piece and an observation window arranged on the upper shell, the indicating piece is provided with an indicating rod, the indicating piece is fixedly connected with the free ends of a pair of metal elastic reeds to form linkage, so that the static contact and the movable contact are in a closed state and a disconnected state, and the end surfaces of the indicating rod are in a state opposite to and deviated from the observation window respectively.

The utility model discloses portable residual current protection plug is on the basis of former mechanism, only through addding the contact state indicating mechanism that the indicator that links with the free end of a pair of metal elasticity reed and the observation window on the casing constitutes, reaches to utilize the observation window to observe the indicator and can know the contact state, and contact state indicating mechanism structure is very simple simultaneously, consequently can not increase the whole volume of socket, still has original protect function simultaneously.

As the utility model discloses a still further set up, the indicator has the connecting portion of a horizontal setting, and the connecting portion both ends are with a pair of free end fixed connection, the indicator lever is vertical setting on connecting portion.

As a further arrangement of the utility model, the electromagnetic assembly comprises an electromagnetic coil and a movable iron core, the electromagnetic coil is fixedly arranged, the movable iron core is axially and slidably arranged in a central hole of the electromagnetic coil, and the front end of the movable iron core is exposed; the free ends of the metal elastic reeds extend towards the two sides of the exposed end of the movable iron core, the reset button hole and the test button hole are arranged close to the exposed end of the movable iron core, a connecting line of the reset button hole and the test button hole and a connecting line between the free ends of the pair of metal elastic reeds are vertically distributed between projections on the upper shell, and the observation window is arranged between the reset button hole and the test button hole.

As the utility model discloses a still further setting, the electromagnetism unit mount is in the plastic support, plastic support and solenoid are fixed to be set up on the base plate, a pair of moving contact subassembly sets up the both sides at the plastic support respectively, the indicator lever is vertical setting on connecting portion and is close to the one end of plastic support, the base plate is equipped with the breach with the corresponding position of indicator lever.

As a further arrangement of the present invention, a rod-shaped lens made of a transparent material is fitted in the observation window, and an inner side end of the lens is opposite to the end surface of the indication rod.

The present invention will be further described with reference to the accompanying drawings and specific embodiments.

It should be noted that the terms "upper", "lower", "inner", "outer", "middle", and the like in the description and the claims of the present application indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings. These terms are used primarily to better describe the invention and its embodiments, and are not intended to limit the indicated devices, elements or components to a particular orientation or to be constructed and operated in a particular orientation. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

Drawings

FIG. 1 is a schematic view of a closed-state three-dimensional structure according to an embodiment of the present invention;

FIG. 1 is a schematic view of an apparent three-dimensional structure of an embodiment of the present invention;

FIG. 2 is a schematic view showing an internal structure of the upper case opened according to the embodiment of the present invention;

FIG. 3 is a schematic diagram of the internal structure of the upper case opened according to the embodiment of the present invention;

fig. 4 is a schematic view of a three-dimensional structure of an electromagnetic assembly according to an embodiment of the present invention in a breaking state;

fig. 5 is a schematic diagram of a three-dimensional structure of a breaking state of an electromagnetic assembly according to an embodiment of the present invention;

fig. 6 is a schematic diagram of a three-dimensional structure of a breaking state of an electromagnetic assembly according to a specific embodiment of the present invention;

fig. 7 is a schematic diagram of a closed-state three-dimensional structure of an electromagnetic assembly according to an embodiment of the present invention;

fig. 8 is a schematic diagram of a closed-state three-dimensional structure of an electromagnetic assembly according to an embodiment of the present invention;

FIG. 9 is a front view of a closed state of an embodiment of the electromagnetic assembly of the present invention;

fig. 10 is a top view of an electromagnetic assembly according to an embodiment of the present invention in a closed state;

FIG. 11 is a sectional view of the structure A-A of FIG. 10;

FIG. 12 is a top view of an electromagnetic assembly according to an embodiment of the present invention in a breaking state;

FIG. 13 is a sectional view of the structure B-B of FIG. 12.

Detailed Description

As shown in fig. 1-3, the mobile residual current protection plug includes a housing 1, and a reset button 7, a test button 2, a residual current electromagnetic operating mechanism, a residual current detection circuit and a contact state indicating mechanism which are arranged in the housing 1. The shell is composed of an upper shell 101 and a lower shell 102, the upper shell 101 covers the lower shell 102, the shell is made of insulating plastics, and the residual current electromagnetic action mechanism comprises a pair of movable contact assemblies 5, a pair of static contact assemblies 6, an electromagnetic assembly and a reset button 7. The electromagnetic component comprises an electromagnetic coil 8 and a movable iron core 9, a tripping linkage mechanism is arranged between the movable contact component 5 and the movable iron core 9, and the tripping linkage mechanism drives the movable contact 501 of the movable contact component 5 and the static contact 601 of the static contact component 6 to be closed under the reset action of the reset button 7. In this embodiment, the electromagnetic assembly is mounted in a plastic bracket 10, the pair of moving contact assemblies 5, the pair of fixed contact assemblies 6, the plastic bracket 10 and the reset button 7 are all fixedly mounted on a substrate 11, as shown in fig. 4-8, the plastic bracket 10 and the electromagnetic coil 8 are fixedly disposed in the middle of one surface of the substrate 11, the movable iron core 9 is axially slidably disposed in a central hole of the electromagnetic coil 8, the axis of the central hole of the electromagnetic coil 8 is parallel to the substrate 11, the front end of the movable iron core 9 is exposed, the pair of moving contact assemblies 5 are respectively disposed on two sides of the plastic bracket 10 on which the electromagnetic coil 8 is mounted, each moving contact assembly 5 includes a metal elastic spring 502 and a moving contact 501, one end of the metal elastic spring 502 is fixedly disposed, the other end is a free end, and the free ends of the pair of metal elastic springs extend to two sides of the exposed end of the movable iron core, the movable contact 501 is fixedly arranged on a free end, the fixed contact 601 is arranged on the base plate 11 and is opposite to the movable contact 501, the movable contact 501 has elastic force separated from the fixed contact 601 due to the elasticity of the metal elastic spring piece 502, the pair of free ends are connected into a whole by a connecting piece 13 made of insulating materials, the reset button 7 is arranged on the other surface of the base plate 11 and is positioned on one side of the front end of the movable iron core 9, the pressing direction is vertical to the sliding direction of the movable iron core 9, the reset button 7 is also internally provided with a reset spring 14, and the reset spring 14 enables the reset button 7 to have upward elastic force (opposite to the pressing direction). Be equipped with linkage piece 15 in the reset button 7, linkage piece 15 one end is connected with reset button 7, be equipped with horizontal protrusion 16 on the linkage piece 15, the linkage piece 15 other end is the free end, all is equipped with the trompil on base plate 11 and the connecting piece 13, the protruding direction of horizontal protrusion 16 with the elastic force direction of elasticity reset piece 12 is unanimous, linkage piece 15 is preferred to be made by the elastic metal piece, linkage piece 15 is rectangular shape, and middle part right angle bending becomes "ㄣ" shape twice, and the kink constitutes horizontal protrusion 16, movable iron core 9 front end is equipped with radial perforation 17, the free end clearance of linkage piece 15 passes trompil on base plate 11 and the connecting piece 13, and wear in the radial perforation 17 of movable iron core 9 front end with movable iron core 9 in the linkage of movable iron core 9 slip direction constitute tripping linkage mechanism.

The shape and the size of the shell can be designed according to specific conditions, in the specific embodiment, as shown in fig. 3 and 4, the shell 1 is similar to a rectangle, the residual current electromagnetic actuating mechanism and the residual current detection circuit are arranged on a circuit board, the circuit board is used as the substrate 11 at the same time, the circuit board is generally rectangular, one end of the circuit board is provided with a notch, and the reset button 7 penetrates through the notch, so that the reset button 7 and the electromagnetic assembly are positioned on two sides of the circuit board, the structure is more compact, and the size is favorably reduced. The plastic support 10 is fixedly arranged on the circuit board, the plastic support 10 and the circuit board are arranged in an inner cavity of the shell, one side provided with the electromagnetic component faces the lower shell 102, the lower part of the outer surface of the lower shell 102 is provided with a quick connection terminal, and the upper part of the outer surface of the lower shell is vertically provided with a pair of pins 12.

As shown in fig. 9 to 13, the contact state indicating mechanism includes an indicating member and an observation window 3 provided on the upper housing 101, the indicating member has an indicating rod 4, the indicating member is linked with free ends of a pair of the metal spring pieces 502, when the fixed contact 601 and the movable contact 501 are switched between a closed state and an open state, the free ends of the metal spring pieces 502 swing around the fixed ends, so that the end surfaces of the indicating rod 4 are respectively opposite to and deviated from the observation window 3 in the closed state and the open state of the fixed contact 601 and the movable contact 501.

In this embodiment, the reset button hole and the test button hole are disposed on the upper case 101, the reset button hole and the test button hole are disposed near the exposed end of the movable iron core 9, a connection line between the reset button hole and the test button hole and a connection line between the free ends of the pair of metal spring reeds 502 are vertically distributed between projections on the upper case 101, the arrangement here is not strictly vertical, but only indicates that the free ends are transversely distributed, the reset button hole and the test button hole are longitudinally distributed, and the observation window 3 is disposed between the reset button hole and the test button hole. Such an arrangement is more advantageous in utilizing the interior space to reduce the overall volume.

The indicating piece is preferably provided with a connecting part 13 which is transversely arranged, two ends of the connecting part 13 are fixedly connected with the pair of free ends, and the indicating rod 4 is vertically arranged on the connecting part 13. In this embodiment, the whole connecting portion is a flat T-shape, two ends of a horizontal portion of the T-shape are fixedly connected with free ends of the metal spring 502 at two sides, a through window is arranged on a vertical portion of the T-shape to form the opening, a vertical protruding column is arranged in the middle of the horizontal portion of the T-shape to form the indicating rod 4, the two portions are preferably integrated, and the end portion of the indicating rod 4 penetrates through a notch on the substrate 11 and faces the observation window 3 on the upper casing 101 to play a role in indicating.

In order to further reduce the overall size, as a preferable scheme, the pair of movable contact assemblies 5 are respectively arranged on two sides of the plastic support 10, the indication rod 4 is vertically arranged on the connecting portion 13 and is close to one end of the plastic support 10, a gap 19 is arranged at a position of the base plate 11 corresponding to the indication rod 4, and the observation window 3 corresponds to the gap 19 of the base plate 11, so that the arrangement is favorable for reducing the size of the mobile residual current protection plug in the length direction (i.e. the sliding direction of the movable iron core 9), and the overall size is reduced.

In order to facilitate observation and improve the indication effect, in this embodiment, a rod-shaped lens 18 made of a transparent material (such as organic glass or transparent resin) is fitted in the observation window 3, the lens 18 is inserted in the observation window 3, and an inner end (a lower end entering the inside of the housing) of the lens 18 is opposite to an end surface of the indication rod 4 (the fixed contact 601 and the movable contact 501 are in a closed state).

The working principle of the mobile residual current protection plug is as follows:

when the power supply is switched on, the electromagnetic coil 8 is electrified to make the movable iron core 9 have an attraction force which is retracted inwards, so that the free end of the metal elastic reed 502 has a pulling force towards the plastic bracket 10. At this time, the reset button 7 makes the linkage piece 15 at the highest initial position under the elastic force of the reset spring 14, the horizontal projection 16 part at the middle part of the linkage piece 15 is above the connecting piece 13, and the metal elastic spring pieces 502 of the pair of moving contact assemblies 5 elastically make the moving contact 501 separate downwards from the fixed contact 601; when resetting, the reset button 7 is pressed, the linkage piece 15 moves downwards until the horizontal protrusion 16 part is lower than the connecting piece 13, the free end of the linkage piece 15 overcomes the self elastic force under the action of the attractive force of the movable iron core 9, so that the horizontal protrusion 16 part in the middle of the linkage piece 15 is positioned below the connecting piece 13, after the pressing force on the reset button 7 is removed, the linkage piece 15 returns upwards under the action of the elastic force of the reset spring 14, and at the moment, the horizontal protrusion 16 part in the middle of the linkage piece 15 hooks the connecting piece 13 to move upwards together until the movable contact 501 is contacted with the fixed contact 601 and closed and is kept; when the electricity leakage or electric shock occurs, the electromagnetic coil 8 in the electromagnetic assembly loses the electricity, the movable iron core 9 is released to extend outwards, the horizontal protrusion 16 part is separated from the connecting piece 13 under the action of the self elastic force of the free end of the linkage piece 15, the horizontal protrusion 16 part in the middle of the linkage piece 15 is separated from the lower part of the connecting piece 13, the movable contact 501 of the movable contact assembly 5 is separated from the fixed contact 601 downwards under the elastic action of the metal elastic spring piece 502, and the tripping protection action is completed.

The above examples are merely illustrative for clarity 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. It is not necessary or necessary to exhaustively enumerate all embodiments herein, and obvious variations or modifications can be made without departing from the scope of the invention.

Claims (5)

1. A mobile residual current protection plug comprises a shell, a reset button, a test button, a residual current electromagnetic action mechanism and a residual current detection circuit; the shell consists of an upper shell and a lower shell, and the upper shell covers the lower shell; the residual current electromagnetic action mechanism comprises a pair of movable contact assemblies, a pair of fixed contact assemblies and an electromagnetic assembly, the pair of movable contact assemblies are symmetrically and respectively arranged on two sides of the electromagnetic coil, each movable contact assembly comprises a metal elastic reed and a movable contact, one end of each metal elastic reed is fixedly arranged, the other end of each metal elastic reed is a free end, and the movable contact is fixedly arranged on the free end; the fixed contact and the movable contact in the fixed contact component are arranged oppositely, the upper shell is provided with a reset button hole and a test button hole, and the reset button and the test button pass through the reset button hole and the test button hole to be exposed, and the device is characterized in that: the contact state indicating mechanism comprises an indicating piece and an observation window arranged on the upper shell, the indicating piece is provided with an indicating rod, the indicating piece is fixedly connected with the free ends of a pair of metal elastic reeds to form linkage, so that the static contact and the movable contact are in a closed state and a disconnected state, and the end surfaces of the indicating rod are in a state opposite to and deviated from the observation window respectively.

2. A mobile residual current protection plug according to claim 1, characterized in that: the indicating piece is provided with a connecting part which is transversely arranged, two ends of the connecting part are fixedly connected with the pair of free ends, and the indicating rod is vertically arranged on the connecting part.

3. A mobile residual current protection plug according to claim 2, characterized in that: the electromagnetic assembly comprises an electromagnetic coil and a movable iron core, the electromagnetic coil is fixedly arranged, the movable iron core is axially and slidably arranged in a central hole of the electromagnetic coil, and the front end of the movable iron core is exposed; the free ends of the metal elastic reeds extend towards the two sides of the exposed end of the movable iron core, the reset button hole and the test button hole are arranged close to the exposed end of the movable iron core, a connecting line of the reset button hole and the test button hole and a connecting line between the free ends of the pair of metal elastic reeds are vertically distributed between projections on the upper shell, and the observation window is arranged between the reset button hole and the test button hole.

4. A mobile residual current protection plug according to any one of claims 1 to 3, wherein: the electromagnetic assembly is installed in the plastic support, the plastic support and the electromagnetic coil are fixedly arranged on the substrate, the pair of moving contact assemblies are respectively arranged on two sides of the plastic support, the indicating rod is vertically arranged on the connecting portion and close to one end of the plastic support, and notches are formed in the positions, corresponding to the indicating rod, of the substrate.

5. A mobile residual current protection plug according to claim 4, characterized in that: the observation window is matched with a rod-shaped lens made of transparent materials, and the inner side end of the lens is opposite to the end face of the indicating rod.

Images