CN204216276U - With the earth leakage protective socket of emergency exit - Google Patents

Abstract

The utility model discloses an electric leakage protection socket with a safety door, which comprises a housing fixed by a bottom box and an upper cover, a tripping mechanism and a control circuit board for controlling the tripping mechanism are arranged in the housing, and a plug is provided on the upper cover The bottom box is provided with an input terminal and an output terminal, and a safety door is provided on the inside of the upper cover. The safety door is opposite to the plug socket, the tripping mechanism is connected with the control circuit board, and the reset device is a limit device according to the trigger signal. The reset device is released or jammed so that the movable contact is disconnected from or contacts the plug socket and the output. The utility model is equipped with a unique safety door structure, the movement of the slider is consistent, easy to use, and plays the role of safety protection. The tripping mechanism controlled by the control circuit board can effectively avoid casualties caused by electric leakage, and the response is sensitive. Fast and practical.

Description

Leakage protection socket with safety door

technical field

The utility model relates to an electric leakage protection device, in particular to an electric leakage protection socket with a safety door.

Background technique

The basic principle of leakage protection of low-voltage electrical appliances is to monitor the current difference between the live wire and the neutral wire of the circuit through the internal detection magnetic ring (transformer) of the device. Once the current difference reaches the set value of the leakage protection device, the leakage protection device will automatically disconnect the load. power supply, thus playing a protective role.

There are many types of earth leakage protection devices on the market, and the quality and performance are uneven. If a conductive metal is inserted into the jack, there will be leakage, so many sockets will have a safety door in the jack, but the structure, performance and action of the safety door are consistent. There is a big difference in reliability, which will make it difficult to insert or pull out the jack, which will affect the use effect and user experience, and when the load leakage is detected, the action of the tripping mechanism will be incoherent and the service life will be short.

It can be seen that the current leakage protection socket has the problems of unreasonable structural setting of the safety door, inconvenient use and short service life of the tripping mechanism.

Utility model content

The technical problem to be solved by the utility model is that the structure setting of the safety door on the current leakage protection socket is unreasonable, inconvenient to use and the service life of the tripping mechanism is short.

In order to solve the above technical problems, the technical solution adopted by the utility model is to provide a leakage protection socket with a safety door, which includes a housing fixed by a bottom box and an upper cover, and a tripping mechanism and a The control circuit board for controlling the tripping mechanism, the upper cover is provided with a plug hole, and the bottom box is provided with an input terminal and an output terminal,

The inner side of the upper cover is provided with a safety door, the safety door is opposite to the plug socket, the safety door includes an outer slider and an inner slider, a support piece and a locking block fixed on the support piece, the outer 1. The open end of the inner slider is arranged oppositely, the outer top of the outer slider is fixed to the fixing plate in the upper cover by an outer spring, and the inner top of the inner slider is fixed to the support plate by an inner spring , the inner slider and the inner spring are placed in the outer slider, the outer top of the inner slider and the end of the outer slider are both against the locking block, the support The support piece is fixed in the housing and presses the outer and inner sliders. Both the outer and inner sliders are provided with protruding arcs adapted to the plug, and the support piece is provided with a Holes correspond to through-holes;

The tripping mechanism includes a resetting device that can move up and down, a pair of movable contacts and a limit device, and the two movable contacts are respectively connected to the plug jack and the output end, and the movable contacts The point is set on the moving piece, the moving piece is clamped and fixedly connected with the reset device, the moving piece is connected with the control circuit board through the electric induction device, the limit device is connected with the control circuit board, and It can be clamped and fixed with the reset device.

In the leakage protection socket with a safety door, the upper cover is provided with a reset button and a test button.

In the above leakage protection socket with a safety door, a reset seat is provided on the underside of the reset device, including a reset bridge, a reciprocating reset iron core and a reset spring on the outer cover of the reset iron core. The moving piece is mounted symmetrically on the side, the upper end of the reset iron core is fixed with the reset key, the lower end passes through the reset bridge and is provided with a reverse moving piece, and the reverse moving piece is connected to the reverse The rivet contacts energize the control circuit board.

In the above leakage protection socket with a safety door, the limiting device includes a tripping iron core, a tripping coil, an iron core spring and a reset pin, and the reset pin is fixed at one end of the tripping iron core and passes through the The reset bridge is fixed with the reset seat through the iron core spring, the reset pin is provided with a round hole through which the reset iron core can pass, and the reset iron core is also provided with a reset card slot.

In the leakage protection socket with a safety door, the top ends of the inner slider and the outer slider are respectively provided with an outer fixing column and an inner fixing column for fixing the spring.

In the leakage protection socket with a safety door, a relief groove is provided on the outer bottom of the locking block, and a positioning protrusion matching the relief groove is provided at the end of the outer slider.

In the leakage protection socket with a safety door, the side of the reset pin is in the shape of a "7".

In the leakage protection socket with a safety door, the electric induction device includes a transformer and an input piece, and the transformer is connected to the moving piece through the input piece.

In the leakage protection socket with a safety door, a test piece is provided on the lower side of the test key, and when the test key is pressed, the test piece is in contact with the L pole of the input piece.

In the above leakage protection socket with a safety door, the moving piece is placed in the locking groove of the reset bridge, and a locking spring is arranged in the locking groove and pushes the moving piece to the locking position. top of the slot.

In the utility model, a safety door is set in the plug socket, which can be used only when there are plugs inserted in the two sockets of live wire and neutral wire, which can prevent the occurrence of dangerous situations caused by misoperation of single hole insertion, and the inside of the housing is still Equipped with a mechanical tripping structure and a control circuit board, it can automatically disconnect the movable contact from the plug socket and the output terminal when the leakage occurs, so that no current passes through the plug socket, ensuring the personal safety and security of the user. The environment is safe, the structure is simple and reliable, and the performance is stable.

Description of drawings

Fig. 1 is the structural representation of the utility model;

Fig. 2 is the exploded schematic view of the utility model;

Fig. 3 is the installation schematic diagram of safety door of the present utility model;

Fig. 4 is the schematic diagram when the safety door of the present utility model is closed;

Fig. 5 is the schematic diagram when the safety door of the present utility model is opened;

Fig. 6 is the schematic diagram of the outer slider of the utility model;

Fig. 7 is the schematic diagram of the inner slider of the present utility model;

Fig. 8 is a schematic diagram of the locking block of the present utility model;

Fig. 9 is a schematic diagram of a support sheet of the present invention;

Fig. 10 is a schematic diagram of a reset device and a limiting device of the present invention;

Fig. 11 is a front view of the reset device and the limit device of the present invention.

Detailed ways

The technical solution adopted by the utility model is to provide a leakage protection socket with a safety door, which can ensure the personal safety and environmental safety of the user, and has a simple and reliable structure and stable performance. Below in conjunction with specific embodiment and accompanying drawing, the utility model will be described in detail.

As shown in Figures 1 and 2, the leakage protection socket with a safety door provided by the utility model includes a housing fixed by an upper cover 100 and a bottom box 200, and the upper cover 100 is provided with a grounding hole 110 and a plug jack 120 And reset key 130, test key 140, plug jack 120 includes two sockets of zero wire and fire wire, bottom box 200 is provided with input end 210 and output end 220, is provided with the safety door 300 corresponding to plug jack 120, A tripping mechanism 400 and a control circuit board for controlling the tripping mechanism 400 are also provided.

As shown in Fig. 3, Fig. 4, Fig. 5, Fig. 6, Fig. 7, Fig. 8 and Fig. 9, a safety door 300 is provided on the inner side of the upper cover 100, and the safety door 300 is opposite to the plug jack 120 to ensure that the socket and the plug are disconnected. When opening, the plug jack 120 is disconnected from the power supply to prevent dangerous situations such as electric shock from occurring.

The safety door 300 includes an outer slider 330 , an inner slider 320 , a support piece 310 and a locking block 340 fixed on the support piece 310 . The outer top of the outer slider 330 is provided with an outer fixed column 334, and the two ends of the outer spring 331 are respectively fixed with the outer fixed column 334 and the fixed plate in the upper cover 100. The inner top of the inner slider 320 is provided with an inner fixed column 324. The two ends of the inner spring 321 are respectively fixed on the inner fixing column 324 and the supporting piece, and the inner slider 320 and the inner spring 321 are placed in the outer slider 330 . The outside of the top of the inner slider 320 and the end of the outer slider 330 are all against the locking block 340, the outer bottom of the locking block 340 is provided with a relief groove 341, and the end of the outer sliding block 330 is provided with a relief groove 341. The positioning protrusions 332 are matched with the positioning grooves 341 . The support piece 310 is fixed in the housing and presses the outer slider 330 and the inner slider 320. The outer slider 330 and the inner slider 320 are provided with a first protruding arc surface 333 and a second protruding arc adapted to the plug. On the surface 323 , the support piece 310 is provided with a through hole 311 corresponding to the plug insertion hole 120 .

The utility model is in a closed state when no plug is inserted, and the outer slider 330 and the inner slider 320 lean against one end of the slot of the upper cover 100 under the tension of the outer spring 331 and the inner spring 321 respectively (not shown in the figure) , to block the plug insertion hole 120, so that the recess 341 and the positioning protrusion 322 are engaged.

When the plug is inserted into the plug jack 120, the two pins of the plug are respectively pressed on the first protruding arc surface 333 and the second protruding arc surface 323, and as the pressure is continuously applied downward, the outer slider 330 and the inner slider 320 is squeezed by the pressure on the same side at the same time, and then compresses the outer spring 331 and the inner spring 321 until the plug is opposite to the through hole 311 on the support piece 310 and inserted into it, the support piece 310 is stuck on the upper cover 100, ensuring that the safety door 300 is in the Does not fall off while running. Therefore, when a child or user inserts a single piece of conductive metal into a jack due to misoperation, even if one of the sliders is stretched by the insertion force, another slider will block the jack, effectively preventing the conductive metal from touching the utility model. The electric shock accident caused by the conductive insert plays the role of safety protection.

As shown in FIG. 10 and FIG. 11 , the tripping mechanism 400 includes a reset device, a pair of movable contacts and a limit device.

The reset device is arranged on the reset seat (not marked in the figure), and includes a reset bridge 412, a reciprocating reset iron core 410 and a reset spring 411 on the periphery of the reset iron core 410, the upper end of the reset iron core 410 and the reset key 130 Fixed, the lower end passes through the reset bridge 412 and is provided with a reverse moving piece 413, and the reverse moving piece 413 is in contact with the control circuit board 500 through a reverse rivet 414 to conduct electricity.

The movable contact includes a first contact 431 and a second contact 432, which are respectively connected to the plug socket 120 and the output terminal 220. The movable contact is arranged on the movable piece 430, and the middle part of the movable piece 430 is clamped with the reset bridge 412. Fixedly connected, a moving piece 430 is arranged symmetrically on both sides of the reset bridge 412 , and the moving piece 430 is connected to the control circuit board 500 through an electric induction device. The electric induction device includes a mutual inductor 440 and an input piece 441, the first contact 431 and the second contact 432 are arranged in a consistent front and rear, and the locking spring 433 on the reset bridge 412 can keep the movable piece 430 pressed against the card of the reset bridge 412. The top of the groove forms a lever structure with elastic support in the middle, which enables the movable contact to have the function of automatic adjustment, ensures reliable contact of the contact, and solves the problem of poor contact caused by the cumulative tolerance of mass-produced parts. Under the working state of the utility model, the transformer 440 is used to detect whether there is an electric leakage, and sends a trigger signal to make the position-limiting device make a corresponding action when there is an electric leakage.

The limit device includes a tripping iron core 420, a tripping coil 421, a reset pin 424 and an iron core spring 423. The end of the tripping iron core 420 is fixed to the reset pin 424, and the tripping iron core 420 is also provided with a shielding block 422. , used to shield the magnetic flux of the tripping coil 421, the side of the reset pin 424 is in the shape of "7", passes through the reset bridge 412 and is provided with a round hole through which the reset iron core 410 can pass, and also passes through the iron core spring 423 and the reset seat The outer side is fixed, and the tension of the iron core spring 423 keeps the tripping iron core 420 at a proper position of the tripping coil 421 , which facilitates the use of the maximum electromagnetic force generated by the tripping coil 421 . The reset core 410 is provided with a reset slot (not shown in the figure) matching the reset pin 424 .

When the utility model is in use, press the reset key 130, the reset spring 411 exerts pressure on the reset bridge 412 to make it move down, so that the reverse moving piece 413 and the reverse rivet 414 are in contact, and the control circuit board 500 is turned on so that it has current Through, the tripping iron ring 421 passes current and generates electromagnetic force, so that the tripping iron core 420 pushes the reset pin 424, so that the reset iron core 410 passes through the round hole of the reset pin 424 and is instantly stuck in the reset slot, and the reset spring 411 The tension causes the reset button 130 to drive the reset bridge 412 to move up, so that the first contact 431 and the second contact 432 on the movable piece 430 are respectively connected to the plug jack 120 and the output end 220, and the inside of the plug jack 120 and the output end 220 Powered, plugged in and ready to use.

A test piece 443 is provided on the lower side of the test key 140 . When the test key 140 is pressed manually, the test piece 443 on the lower side will cause the transformer 440 to detect leakage through the L pole of the input piece 441 . Therefore, when the test button 140 is pressed or the plug jack 120 is leaking, the transformer 440 will send a trigger signal, and the control circuit board 500 will input current to the trip iron ring 421, and the trip iron ring 421 will generate electromagnetic force to make the trip iron The core 420 pushes the reset pin 424, so that the reset pin 424 slips out of the reset slot, the reset key 130 moves up, and the reset bridge 412 moves down to return to its original position, so that the first contact 431 and the second contact 432 on the movable piece 430 respectively The connection with the plug socket 120 and the output terminal 220 is disconnected, and the power in the plug socket 120 and the output terminal 220 is cut off.

The utility model is equipped with a unique safety door structure, the movement of the slider is consistent, and it is easy to use. Even if one of the sliders is pushed apart by the insertion force, there is another slider to block the jack, which effectively prevents the conductive metal from touching The electric shock accident caused by the conductive insert of the utility model plays the role of safety protection, and the tripping mechanism controlled by the control circuit board can effectively avoid casualties caused by electric leakage, with quick response and strong practicability.

The utility model is not limited to the above-mentioned best implementation mode, anyone should know that the structural changes made under the enlightenment of the utility model, all technical solutions that are the same as or similar to the utility model, all fall under the protection of the utility model within range.

Claims (10)

1. A leakage protection socket with a safety door, including a housing fixed by a bottom box and an upper cover, the housing is provided with a tripping mechanism and a control circuit board for controlling the tripping mechanism, and the upper cover is provided with A plug jack, the bottom box is provided with an input end and an output end, which is characterized in that: The inner side of the upper cover is provided with a safety door, the safety door is opposite to the plug socket, the safety door includes an outer slider and an inner slider, a support piece and a locking block fixed on the support piece, the outer 1. The open end of the inner slider is arranged oppositely, the outer top of the outer slider is fixed to the fixing plate in the upper cover by an outer spring, and the inner top of the inner slider is fixed to the support plate by an inner spring , the inner slider and the inner spring are placed in the outer slider, the outer top of the inner slider and the end of the outer slider are both against the clamping block, the support The support piece is fixed in the housing and presses the outer and inner sliders. Both the outer and inner sliders are provided with protruding arcs adapted to the plug, and the supporting piece is provided with a Holes correspond to through-holes; The tripping mechanism includes a resetting device that can move up and down, a pair of movable contacts and a limit device, and the two movable contacts are respectively connected to the plug jack and the output end, and the movable contacts The point is set on the moving piece, the moving piece is clamped and fixedly connected with the reset device, the moving piece is connected with the control circuit board through the electric induction device, the limit device is connected with the control circuit board, and It can be clamped and fixed with the reset device. 2. The leakage protection socket with a safety door according to claim 1, wherein the upper cover is provided with a reset button and a test button. 3. The leakage protection socket with a safety door as claimed in claim 2, characterized in that, the underside of the reset device is provided with a reset seat, including a reset bridge, a reciprocating reset iron core and the outer cover of the reset iron core The reset spring, the two sides of the reset bridge are symmetrically mounted with the movable piece, the upper end of the reset iron core is fixed with the reset button, and the lower end passes through the reset bridge and is provided with a reverse movable piece , the contact between the reverse moving piece and the reverse rivet makes the control circuit board energized. 4. The earth-leakage protection socket with safety door as claimed in claim 3, is characterized in that, described limiter comprises tripping iron core, tripping coil, iron core spring and reset pin, and described reset pin is fixed on described One end of the trip iron core passes through the reset bridge and is fixed to the reset seat by the iron core spring. The reset pin is provided with a round hole through which the reset iron core can pass. The reset iron core There is also a reset card slot matching the reset pin on the top. 5. The leakage protection socket with a safety door according to claim 1, characterized in that, the top ends of the inner slider and the outer slider are respectively provided with an outer fixing column and an inner fixing column for fixing the spring. 6. The leakage protection socket with a safety door as claimed in claim 1, characterized in that, the outer bottom of the clamping block is provided with a relief groove, and the end of the outer slider is provided with the relief groove. Grooves match locating bumps. 7. The leakage protection socket with a safety door according to claim 3, characterized in that, the side of the reset pin is in the shape of "7". 8. The leakage protection socket with a safety door according to claim 2, wherein the electric induction device comprises a transformer and an input piece, and the transformer is connected to the movable piece through the input piece. 9. The earth-leakage protection socket with safety door as claimed in claim 8, is characterized in that, the underside of described test key is provided with test piece, when pressing described test key, the L of described test piece and described input piece The poles meet. 10. The earth leakage protection socket with a safety door as claimed in claim 3, wherein the moving piece is placed in the locking slot of the reset bridge, and a locking spring is arranged in the locking slot and will The moving piece pushes against the top of the locking slot.