Portable leakage protection plug

Abstract

The utility model discloses a portable electric leakage protection plug, and aims to solve the technical problems that the whole existing electric leakage protection plug is too large, the positions of two to three slots of an extension socket are easily occupied after the electric leakage protection plug is inserted into the socket, and even the electric leakage protection plug cannot be installed due to the too large electric leakage protection plug. The plug comprises a shell, an output wire and pins, a control circuit board, a tripping assembly, an inductor, a wire holder and a switch are arranged in the shell, the switch is installed on the upper side of the control circuit board and located outside the shell, the control circuit board is located on the upper side in the shell, and the tripping assembly and the inductor are located on the left side and the right side of the middle of the shell. The pins and the wire holder are located on the left and right sides of the bottom end in the shell. The design of the utility model solves the technical problems that the conventional electric leakage protection plug is too large as a whole, easily occupies the positions of two to three slots of an extension socket after being inserted into a socket, and even cannot be installed due to the too large electric leakage protection plug.

Description

Technical Field

[0001] The utility model belongs to the technical field of power supply circuits, and in particular relates to a portable leakage protection plug. Background Art

[0002] With the increasing popularity of household appliances, people pay more and more attention to the safety of using household appliances. At present, many household appliances are equipped with leakage protection plugs at the input end of the power supply.

[0003] The sensor used in the existing leakage protection plug is composed of two circular coils of the same size, which respectively sense the leakage current and whether the output N line is mistakenly grounded. The disadvantages are that the height is too high and the total volume is too large. At the same time, the volume of the leakage disconnection structure and the leakage sensor structure is too large, and the upgraded self-detection function makes the volume of the PCBA carrying the IC circuit also too large, resulting in the overall size being too large. After being inserted into the socket, it is easy to occupy the position of two to three slots of the socket strip, and the leakage protection plug may even be impossible to install because it is too large. Utility Model Content

[0004] (1) Technical issues to be solved

[0005] In view of the deficiencies in the prior art, the purpose of the utility model is to provide a portable leakage protection plug, which is intended to solve the technical problems that the existing leakage protection plug is generally too large, easily occupies two to three slots of the socket after being inserted into the socket, and even cannot be installed because the leakage protection plug is too large.

[0006] (2) Technical solution

[0007] In order to solve the above technical problems, the utility model provides a portable leakage protection plug, which includes a shell, an output wire and a pin. A control circuit board, a tripping assembly, a sensor, a terminal block and a switch are arranged inside the shell. The switch is installed on the upper side of the control circuit board and is located outside the shell. The control circuit board is located on the upper side of the shell. The tripping assembly and the sensor are located on the left and right sides of the middle of the shell. The pin and the terminal block are located on the left and right sides of the bottom end of the shell. A static contact and a moving contact are fixedly connected to the control circuit board. The moving contact is an elastic structure. The static contact is connected to the pin through a wire. The moving contact is connected to the terminal block through an induction line and bypasses the sensor. The tripping assembly is used for connecting and disconnecting the static contact and the moving contact.

[0008] Preferably, the housing comprises an upper cover, a lower cover and a movable cover, and the lower cover and the movable cover are fixedly connected to the upper cover by screws.

[0009] Furthermore, the inductor includes a first coil and a second coil which are arranged in the same layer inside and outside, and the diameter of the first coil is greater than the diameter of the second coil.

[0010] Furthermore, the tripping assembly includes a fixed frame, a tripping coil, a tripping core and a tripping spring. The tripping core is installed on the fixed frame, the tripping coil is sleeved on the outer surface of the tripping core, the right end of the tripping core passes through the fixed frame and is fixedly connected to a bridge bracket, the tripping spring is sleeved on the outer surface of the tripping core and is located between the bridge bracket and the fixed frame, and the bottom end of the moving contact passes through the bridge bracket.

[0011] Furthermore, the bridge bracket includes a movable block and supporting blocks fixedly connected to the front and rear sides of the movable block, a through slot is provided on the supporting block, the moving contact is located in the through slot, and arcs are provided on both sides of the through slot.

[0012] Furthermore, a protective cover is provided on the outside of the trip assembly, the protective cover is fixedly connected to the control circuit board through a buckle, and an active cavity corresponding to the active block is provided on the right side of the protective cover.

[0013] Furthermore, the pin is fixedly connected to the protective cover through an insulating seat, and the wiring seat is installed on the lower cover and one end is located inside the shell.

[0014] (3) Beneficial effects

[0015] Compared with the prior art, the beneficial effects of the utility model are:

[0016] 1. The utility model reduces the length of the induction line and the cost of the induction line by placing the terminal block below the sensor, and reduces the height of the switch used while meeting the requirements. At the same time, the sensor is changed to two circular coils, one large and one small, and the inner and outer layers are composed of the same layer. The total volume will become smaller, and the performance is not reduced, thereby achieving the effect of overall volume reduction and avoiding the situation where the plug cannot be installed.

[0017] 2. The utility model simplifies the tripping assembly as much as possible and uses the simplest, most common but most effective relay pull-in design. In order to prevent the contact from sticking due to large current leakage after pull-in, a clamping position with appropriate tightness is added to the bridge bracket, so that when a large current leakage occurs, the small-volume tripping assembly can still rely on the elastic structure of the moving contact and the tripping spring to trip normally.

[0018] 3. The release assembly module, sensor module and control circuit board module inside the housing of the utility model can each be produced separately and checked for qualification before being assembled, which will greatly improve the qualification rate of the finished products. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a three-dimensional structural schematic diagram of the utility model.

[0020] Figure 2 It is a schematic diagram of the explosion structure of the utility model.

[0021] Figure 3 It is a schematic diagram of the structure of the explosion structure of the utility model when viewed from above.

[0022] Figure 4 It is a schematic diagram of the internal structure of the shell of the utility model.

[0023] Figure 5 It is a structural schematic diagram of the tripping assembly of the utility model.

[0024] Figure 6 This is a schematic diagram of the control circuit structure of the utility model.

[0025] Figure 7 It is a structural schematic diagram of the sensor of the utility model.

[0026] The marks in the accompanying drawings are: 1. shell; 2. output wire; 3. pin; 4. control circuit board; 5. trip assembly; 6. sensor; 7. terminal block; 8. switch; 9. static contact; 10. moving contact; 11. wire; 12. induction line; 101. upper cover; 102. lower cover; 103. movable cover; 104. screw; 601. first coil; 602. second coil; 501. fixing frame; 502. trip coil; 503. trip core; 504. trip spring; 505. bridge bracket; 506. movable block; 507. bracket block; 508. through slot; 13. protective cover; 14. buckle; 15. movable cavity; 16. insulating seat. DETAILED DESCRIPTION

[0027] This specific implementation is a portable leakage protection plug, and its structural diagram is as follows Figure 1-Figure 7 As shown, the plug includes a shell 1, an output wire 2 and a pin 3, the ground wire of the output wire 2 is connected to the ground end of the pin 3, and a control circuit board 4, a trip assembly 5, an inductor 6, a terminal block 7 and a switch 8 are arranged inside the shell 1. The switch 8 is installed on the upper side of the control circuit board 4 and is located outside the shell 1. The control circuit board 4 is located on the upper side of the shell 1. The trip assembly 5 and the inductor 6 are located on the left and right sides of the middle of the shell 1. The pin 3 and the terminal block 7 are located on the left and right sides of the bottom end of the shell 1. A static contact 9 and a moving contact 10 are fixedly connected to the control circuit board 4. The moving contact 10 is an elastic structure. The static contact 9 is connected to the pin 3 through a wire 11, and the moving contact 10 is connected to the terminal block 7 through an induction line 12 and bypasses the inductor 6. The trip assembly 5 is used for connecting and disconnecting the static contact 9 and the moving contact 10.

[0028] like Figure 1 and Figure 2As shown: the housing 1 includes an upper cover 101, a lower cover 102 and a movable cover 103. The lower cover 102 and the movable cover 103 are fixedly connected to the upper cover 101 by screws 104. In this way, the movable cover 103 can be opened when setting the wiring, which is convenient for installing the output wire 2 and the wiring seat 7.

[0029] like Figure 3 and Figure 4 As shown, the inductor 6 includes a first coil 601 and a second coil 602 which are arranged in the same layer inside and outside, and the diameter of the first coil 601 is greater than the diameter of the second coil 602.

[0030] This way the setting is changed to two circular coils, one large and one small, with the inside and the outside in the same layer. The total volume will become smaller, but the performance will not be reduced.

[0031] like Figure 3 , Figure 4 and Figure 5 As shown: the tripping assembly 5 includes a fixing frame 501, a tripping coil 502, a tripping core 503 and a tripping spring 504, the tripping core 503 is installed on the fixing frame 501, the tripping coil 502 is sleeved on the outer surface of the tripping core 503, the right end of the tripping core 503 passes through the fixing frame 501 and is fixedly connected to a bridge bracket 505, the tripping spring 504 is sleeved on the outer surface of the tripping core 503 and is located between the bridge bracket 505 and the fixing frame 501, and the bottom end of the moving contact 10 passes through the bridge bracket 505.

[0032] This setting simplifies the tripping structure as much as possible and uses the simplest, most common but most effective relay pickup design.

[0033] like Figure 4 and Figure 5 As shown, the bridge bracket 505 includes a movable block 506 and a support block 507 fixedly connected to the front and rear sides of the movable block 506, a through slot 508 is provided on the support block 507, the moving contact 10 is located in the through slot 508, and arcs are provided on both sides of the through slot 508.

[0034] Such a setting adds a clamping position with appropriate tightness to the bridge bracket 505. When a large current leakage occurs, the small-volume tripping component 5 can still rely on the elastic structure of the movable contact 10 and the tripping spring 504 to trip normally, thereby preventing the contacts from sticking due to large current leakage after being attracted.

[0035] like Figure 5 and Figure 6 As shown: a protective cover 13 is arranged on the outside of the trip assembly 5, and the protective cover 13 is fixedly connected to the control circuit board 4 through a buckle 14, and an active cavity 15 corresponding to the active block 506 is arranged on the right side of the protective cover 13. In this way, the protective cover 13 is arranged to protect and fix the trip assembly 5, and the installation is more convenient.

[0036] like Figure 2 and Figure 3 As shown: the pin 3 is fixedly connected to the protective cover 13 through the insulating seat 16, and the terminal seat 7 is installed on the lower cover 102 and one end is located inside the shell 1. In this way, the insulating seat 16 is arranged to insulate the contact of the pin 3 to prevent the pin 3 from leaking electricity.

[0037] Working principle: By placing the terminal block 7 close to the bottom of the sensor 6, the length of the induction line 12 is reduced, the cost of the induction line 12 is reduced, and the height of the switch used is reduced when the requirements are met. At the same time, the sensor 6 is changed to two circular coils, one large and one small, and the inner and outer layers are composed of the same layer. The total volume will become smaller, and the performance is not reduced, thereby achieving the effect of overall volume reduction. By simplifying the tripping component 5 as much as possible, using the simplest, most common but most effective relay pull-in method design, in order to prevent the contact from sticking due to large current leakage after the pull-in, a moderately tight clamping position is added to the bridge bracket, so that when a large current leakage occurs, the small-volume tripping component can still rely on the elastic structure of the moving contact 10 and the tripping spring 504 to trip normally. When in use, the sensor 6 monitors the current difference of the output wire 2 to detect whether there is leakage. When the current difference reaches the set range, the set IC program will control the leakage tripping component 5 to disconnect the static contact 9 and the moving contact 10 on the main circuit, so that the power supply is disconnected to protect the safety of electricity use.

[0038] The above embodiments are preferred implementation schemes of the present invention. In addition, the present invention can also be implemented in other ways. Any obvious replacement without departing from the concept of the present technical solution is within the protection scope of the present invention.

Claims

1. A portable leakage protection plug, comprising a housing (1), an output wire (2) and a plug pin (3), characterized in that: The housing (1) is provided with a control circuit board (4), a trip assembly (5), a sensor (6), a terminal block (7) and a switch (8); the switch (8) is mounted on the upper side of the control circuit board (4) and is located outside the housing (1); the control circuit board (4) is located on the upper side of the housing (1); the trip assembly (5) and the sensor (6) are located on the left and right sides of the middle of the housing (1); and the pin (3) and the terminal block (7) are located on the left and right sides of the bottom end of the housing (1); The control circuit board (4) is fixedly connected with a static contact (9) and a moving contact (10); the moving contact (10) is an elastic structure; the static contact (9) is connected to the plug pin (3) via a wire (11); the moving contact (10) is connected to the wiring seat (7) via an induction wire (12) and bypasses an inductor (6); and the trip assembly (5) is used for connecting and disconnecting the static contact (9) and the moving contact (10).

2. A portable leakage protection plug according to claim 1, characterized in that: The housing (1) comprises an upper cover (101), a lower cover (102) and a movable cover (103); the lower cover (102) and the movable cover (103) are both fixedly connected to the upper cover (101) by means of screws (104).

3. A portable leakage protection plug according to claim 2, characterized in that: The inductor (6) comprises a first coil (601) and a second coil (602) which are arranged in the same layer inside and outside, and the diameter of the first coil (601) is greater than the diameter of the second coil (602).

4. A portable leakage protection plug according to claim 3, characterized in that: The trip assembly (5) comprises a fixing frame (501), a trip coil (502), a trip core (503) and a trip spring (504); the trip core (503) is mounted on the fixing frame (501); the trip coil (502) is sleeved on the outer surface of the trip core (503); the right end of the trip core (503) passes through the fixing frame (501) and is fixedly connected to a bridge bracket (505); the trip spring (504) is sleeved on the outer surface of the trip core (503) and is located between the bridge bracket (505) and the fixing frame (501); and the bottom end of the moving contact (10) passes through the bridge bracket (505).

5. A portable leakage protection plug according to claim 4, characterized in that: The bridge bracket (505) comprises a movable block (506) and a support block (507) fixedly connected to the front and rear sides of the movable block (506); a through slot (508) is provided on the support block (507); the movable contact (10) is located in the through slot (508); and circular arcs are provided on both sides of the through slot (508).

6. A portable leakage protection plug according to claim 5, characterized in that: A protective cover (13) is provided on the outside of the release assembly (5); the protective cover (13) is fixedly connected to the control circuit board (4) via a buckle (14); and an active cavity (15) corresponding to the active block (506) is provided on the right side of the protective cover (13).

7. A portable leakage protection plug according to claim 6, characterized in that: The plug pin (3) is fixedly connected to the protective cover (13) via an insulating seat (16); the wiring seat (7) is mounted on the lower cover (102) and one end of the wiring seat is located inside the housing (1).

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