Leakage protection plug

Abstract

The utility model discloses a leakage protection plug which comprises a base and an upper cover covering the base, and the base is provided with a circuit board, a power line, at least two electrode pins and elastic sheets arranged corresponding to the electrode pins. The base is also provided with an on-off device used for controlling the contact or disconnection of the elastic sheet and the electrode pin, and a mutual inductor used for inducing current fluctuation, the front end of the elastic sheet is provided with an elastic sheet used for being in contact with the electrode pin, and the rear end of the elastic sheet is provided with a connecting sheet used for penetrating through the mutual inductor; the utility model discloses a leakage protection plug, which comprises a circuit board and a spring plate, the spring plate is arranged on the circuit board, the middle part of the spring plate is provided with a test conducting strip extending upwards, the circuit board is provided with a conducting strip through hole for the test conducting strip to be inserted, and the spring plate is of an integrated structure, aims to overcome the defects of the prior art, and provides the leakage protection plug which is high in production quality, high in production efficiency and better in stability.

Description

TECHNICAL FIELD

[0001] The utility model relates to a leakage protection plug. BACKGROUND

[0002] With the popularity of power systems and the wide use of household appliances, electrical safety problems are increasingly concerned by people. Leakage protection plug as an important electrical safety device, its main function is to quickly cut off the circuit when detecting current anomaly, to prevent electric shock and electrical fire accidents and other accidents. The traditional one is internally provided with a current transformer for inductively measuring the size of the circuit current, and a on-off device for disconnecting the circuit. The zero fire line in the circuit passes through the current transformer, so that the current transformer can inductively measure the size of the circuit current. When the inducted circuit current fluctuates abnormally, the on-off device automatically disconnects the circuit. Its specific structure and principle refer to the patent number CN202022423873.7, named leakage protection plug and test socket capable of testing ground resistance, applied by the inventor. However, this traditional leakage protection plug has a complex structure, and many functions are realized in a limited space, so it uses wires to form part of the circuit conductor. For example, in order to realize the circuit passing through the current transformer, a soft thin wire is usually used to pass through the current transformer to connect the circuit. For example, a test button is usually provided on the leakage protection plug. After pressing the test button, the circuit board simulates a leakage condition to verify whether the device can correctly disconnect the power supply. This requires the circuit to be connected to the soldering point on the circuit board to realize the above function. At this time, a soft thin wire is usually used to connect the circuit board, which makes the product processing difficult, reduces the production efficiency, and increases the difficulty of quality control, resulting in low production quality. Not only is it difficult to control the product yield, but also the product stability and safety are poor.

[0003] The utility model is just generated based on the above-mentioned deficiencies. UTILITY MODEL CONTENT

[0004] The utility model aims at overcoming the deficiencies of the prior art, and provides a leakage protection plug with high production quality, high production efficiency and better stability.

[0005] The utility model is realized through the following technical solutions:

[0006] The utility model provides a kind of leakage protection plug, including base and the upper cover of covering on base, the base is equipped with circuit board, power cord, at least two electrode pins, and the spring corresponding with the electrode pin being arranged, the base is also equipped with the on-off device for controlling spring and electrode pin contact or disconnect, for inductive current fluctuation mutual inductor, the spring front end has the spring piece for being contacted with electrode pin, the spring rear end has the connecting piece for passing through mutual inductor, the spring middle part has the test conductive sheet that projects upward, the circuit board is equipped with the conductive sheet through-hole for test conductive sheet insertion, the spring is integral overall structure.

[0007] As described above, the leakage protection plug, the connecting piece is bent upward after passing through mutual inductor, the circuit board rear part is equipped with the connection through-hole for the end of connecting piece insertion, the wire through-hole for power cord insertion.

[0008] As described above, the leakage protection plug, the electrode pin is equipped with first contact point, the spring piece end is equipped with second contact point, the on-off device includes electromagnetic coil assembly, push-pull rod, cross arm, first reset spring, the push-pull rod is located inside electromagnetic coil assembly to retract push-pull rod when electromagnetic coil works, first reset spring is located between electromagnetic coil assembly and push-pull rod to push push-pull rod to extend, the push-pull rod is connected cross arm, the cross arm is equipped with horizontal arm when moving, can push spring piece swing to make second contact point and first contact point contact.

[0009] As described above, the leakage protection plug, the base is equipped with reset member that can slide up and down relative to it, the reset member is equipped with control rod passing through circuit board, second spring is arranged between circuit board and reset member to push reset member to reset upward, the control rod and cross arm are equipped with clamping structure for blocking reset member to reset upward when push-pull rod extends.

[0010] As described above, the leakage protection plug, the upper cover is equipped with reset member through hole for reset member to pass out, the upper cover and circuit board are equipped with waterproof cover, the waterproof cover has first waterproof part that surrounds control rod.

[0011] As described above, the leakage protection plug, the circuit board is also equipped with indicator light, the waterproof cover also has second waterproof part that covers indicator light, the upper cover is equipped with indicator light through hole for second waterproof part to pass out.

[0012] The leakage protection plug as claimed in the above, wherein the circuit board is further provided with a test button, the waterproof cover is further provided with a third waterproof part covering the test button, the third waterproof part is in a columnar shape and covers the test button, the upper cover is provided with a test button through hole through which the third waterproof part passes, and the waterproof cover is made of soft material in an integrated structure.

[0013] The leakage protection plug as claimed in the above, wherein the upper cover is provided with a surrounding plate capable of surrounding the reset part through hole, the indicator lamp through hole and the test button through hole, and the surrounding plate top presses the waterproof cover on the circuit board.

[0014] The leakage protection plug as claimed in the above, wherein the waterproof cover edge is provided with a surrounding part protruding upward, and the surrounding part surrounds the surrounding plate.

[0015] The leakage protection plug as claimed in the above, wherein the first waterproof part is a downward open cylinder, the second spring is arranged on the inner side of the cylinder and surrounds the control rod, the first waterproof part middle part is provided with a sealing hole through which the control rod passes, the first waterproof part is provided with a sealing ring surrounding the control rod along the sealing hole edge, and the second spring is sleeved on the sealing ring.

[0016] Compared with the prior art, the leakage protection plug has the following advantages:

[0017] 1. The leakage protection plug cancels the wire connection structure, the product is provided with a spring sheet, the spring sheet is cut and bent into an integrated structure through a metal sheet, the spring sheet front part extends to the product front part as an elastic sheet contacting with an electrode plug, the rear connecting sheet is used for passing through an inductor sensing hole and extending to the circuit board, and the spring sheet middle part is provided with a test conductive sheet passing through the bottom circuit board and fixed on the bottom circuit board through soldering, so that corresponding simulation leakage circuits can be arranged on the circuit board, the structure is compact and stable without using the wire connection, the spring sheet and various components can be manufactured first in production, then the mounting seat, the circuit board and various components are assembled into a module, so that the production difficulty is reduced, full-automatic production is realized, production efficiency and production quality are improved, product yield is improved, the product safety is higher and the product service life is longer due to better structural stability.

[0018] 2. The leakage protection plug is provided with a waterproof cover between the upper cover and the circuit board, the waterproof cover has a first waterproof part, a second waterproof part and a third waterproof part and is made of an integrated structure, so that the reset part, the indicator lamp and the test button can be protected at the same time, and the waterproof cover is tightly combined with the circuit board and the upper cover and is firmly connected, so that the waterproof performance of the product is greatly improved. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1It is the three-dimensional schematic view of the leakage protection plug of the utility model;

[0020] Figure 2 It is the sectional view schematic view of the leakage protection plug of the utility model;

[0021] Figure 3 It is the exploded schematic view of the leakage protection plug of the utility model Figure 1 ;

[0022] Figure 4 It is the exploded schematic view of the leakage protection plug of the utility model Figure 2 ;

[0023] Figure 5 It is the partial structure schematic view of the leakage protection plug of the utility model. Specific implementation

[0024] The utility model is further described below in combination with the drawings:

[0025] The direction described in the utility model specification, such as“upper”,“lower”,“left”,“right”,“front”,“back” and so on, are all based on the direction of the drawing as the reference, and for the purpose of facilitating the description of the relationship between various components, and not indicating the unique or absolute position relationship between various components, only for realizing one kind of embodiment of the utility model, and it is not a kind of limitation to its embodiment.

[0026] The utility model provides a kind of leakage protection plug, as Figures 1 to 4 It is shown, including base 1 and the upper cover 2 of lid on base 1, the base 1 is equipped with circuit board 3, power cord 4, at least two electrode pins 5, and the corresponding setting of elastic sheet 6 with electrode pin 5, the base 1 is also equipped with the on-off device 7 for controlling elastic sheet 6 and electrode pin 5 contact or break, for inducting current fluctuation mutual inductor 11, circuit board 3 is generally set in the position close to upper cover 2, other components are set in the lower side of circuit board, of course, it can also be arranged in the direction of inversion.In the embodiment, the elastic sheet 6 front end has the elastic sheet 61 for being contacted with electrode pin 5, the elastic sheet 6 rear end has the connecting sheet 62 for passing through mutual inductor 11, the elastic sheet 6 middle part has the test conductive sheet 63 that projects upward, the circuit board 3 is equipped with the conductive sheet through-hole 31 for test conductive sheet 63 insertion, the elastic sheet 6 is integral whole structure, wherein, the structure of mutual inductor 11 and on-off device 7 can refer to the inductive device and automatic circuit breaker device in the patent scheme of the detailed structure of the leakage protector of the inventor's previous application patent number CN202311371940.7, name is one kind of leakage protection. Detailed structure can refer to Figure 4The elastic sheet 6 is an integral structure cut and bent from a metal sheet. The base is provided with a mounting seat 10, and the on-off device 7 and the transformer 11 are also mounted on the mounting seat 10. The pins of the two devices pass through the circuit board 3 and are welded thereon. The mounting seat 10 is provided with a rectangular insertion slot 101. The elastic sheet 6 has a mounting portion 65 in the middle, which is bent and can be clamped into the insertion slot 101. Of course, the mounting seat 10 can not be provided, and the elastic sheet 6 can be directly mounted on the base 1. The test conductive sheet 63 in the middle of the elastic sheet 6 passes through the circuit board 3 and is fixed thereon by soldering, so that the corresponding analog leakage circuit can be arranged on the circuit board 3. The connecting sheet 62 at the rear of the elastic sheet 6 passes through the induction hole 110 of the transformer 11. The connecting sheets 62 of the two elastic sheets 6 pass through the induction hole 110, respectively. Through the above structure, the compact structure and stable performance can be achieved without using a wire connection. In production, the elastic sheet 6 and various components can be manufactured first, and then the mounting seat 10, the circuit board 3 and various components are assembled into a module, so as to reduce the production difficulty, realize full-automatic production, improve the production efficiency and production quality, improve the yield of products, and at the same time, the structure stability is better, the product safety is higher, and the service life is longer.

[0027] As preferred, as shown in Figure 3 and Figure 4 , the connecting sheet 62 passes through the transformer 11 and is bent upward to form an arc segment, so as to improve the structural stability and the effective utilization rate of the material. The rear of the circuit board 3 is provided with a connecting through hole 32 for the end of the connecting sheet 62 to insert and a wire through hole 33 for the power line 4 to insert, so as to facilitate the subsequent welding process to connect and conduct the corresponding power line 4 and the corresponding connecting sheet 62, and facilitate the production process to realize automatic production.

[0028] In detail, as shown in Figure 2 and Figure 3As shown, the electrode pin 5 is provided with a first contact 51, the end of the elastic sheet 61 is provided with a second contact 64, the on-off device 7 comprises an electromagnetic coil assembly 71, a push-pull rod 72, a cross arm 73, a first reset spring 74, the push-pull rod 72 is located inside the electromagnetic coil assembly 71, and the push-pull rod 72 can be pulled to retract when the electromagnetic coil works, the first reset spring 74 is located between the electromagnetic coil assembly 71 and the push-pull rod 72, and the first reset spring 74 can push the push-pull rod 72 to extend, the push-pull rod 72 is connected to the cross arm 73, and the cross arm 73 is provided with a horizontal arm 731 which can push the elastic sheet 61 to swing when the cross arm 73 moves, so that the second contact 64 contacts the first contact 51. The base 1 is provided with a reset member 75 which can slide up and down relative to the base 1, the reset member 75 is provided with a control rod 751 which passes through the circuit board 3, a second spring 76 is arranged between the circuit board 3 and the reset member 75 to push the reset member 75 to reset upward, and a clamping structure 70 is arranged between the control rod 751 and the cross arm 73 to block the reset member 75 from resetting upward when the push-pull rod 72 extends. The clamping structure 70 is a clamping hook arranged on the control rod 751 and the cross arm 73, when the push-pull rod 72 extends, the cross arm 73 abuts against the control rod 751, so that the clamping hook clamps to prevent the control rod 751 from moving upward, and the cross arm 73 moves to push the elastic sheet 6 to connect with the electrode pin 5 to conduct.

[0029] As a more preferred embodiment, as shown in Figures 2 to 4 As shown, because the upper cover 2 is provided with a reset member through hole 21 for the reset member 75 to pass through, water is easy to enter the through hole gap, therefore, a waterproof cover 8 is arranged between the upper cover 2 and the circuit board 3, and the waterproof cover 8 has a first waterproof part 81 which surrounds the control rod 751.

[0030] As preferred, as shown in Figures 2 to 4 As shown, the circuit board 3 is further provided with an indicator light 9, the waterproof cover 8 further has a second waterproof part 82 which covers the indicator light 9, and the upper cover 2 is provided with an indicator light through hole 22 for the second waterproof part 82 to pass through. The circuit board 3 is further provided with a test button 10, the waterproof cover 8 further has a third waterproof part 83 which covers the test button 10, the third waterproof part 83 is in a columnar shape and covers the test button 10, the upper cover 2 is provided with a test button through hole 23 for the third waterproof part 83 to pass through, and the waterproof cover 8 is made of soft material in an integrated structure. The first waterproof part 81 blocks the periphery of the control rod 751, the second waterproof part 82 blocks the indicator light through hole 22, and the third waterproof part 83 passes through the test button through hole 23 as a pressing part to form a block, thereby ensuring stable sealing performance.

[0031] As a further preferred embodiment, as shown in Figure 2 and Figure 5As shown, the upper cover 2 is provided with a surrounding plate 24 capable of surrounding the reset member through hole 21, the indicator lamp through hole 22 and the test button through hole 23, and the bottom end of the surrounding plate 24 presses the waterproof cover 8 on the circuit board 3, when the upper cover 2 is connected to the base 1, the waterproof cover 8 is pressed on the circuit board 3 through the surrounding plate 24, so that the waterproof cover 8 is firmly installed and closely connected.

[0032] As a further preferred embodiment, as Figures 2 to 5 As shown, the waterproof cover 8 is provided with a surrounding barrier 84 protruding upward from the edge, the surrounding barrier 84 surrounds the surrounding plate 24, and the sealing performance of the waterproof cover 8 against the surrounding liquid is further improved.

[0033] As a further preferred embodiment, as Figure 2 Figure 5 Figures 2 to 5 Figure 2 As shown, the top of the reset member 75 is a downwardly open cylinder, and the first waterproof part 81 is also a cylinder matched with the reset member 75, the second spring 76 is arranged on the inner side of the cylinder and surrounds the control rod 751, the first waterproof part 81 is provided with a sealing hole 811 for the control rod 751 to pass through, and the first waterproof part 81 is provided with a sealing sleeve ring 812 surrounding the control rod 751 along the edge of the sealing hole 811, the second spring 76 is sleeved on the sealing sleeve ring 812, and the installation firmness and sealing performance of the first waterproof part 81 are further improved.

[0034] The above is only an embodiment of the present application, and the specific structure and characteristics of the scheme are not described in detail. It should be noted that for those skilled in the art, without departing from the structure of the present application, a number of modifications and improvements can be made, which should also be considered as the protection scope of the present application, and these will not affect the effect and practicality of the present application. The protection scope of the present application should be subject to the content of its claims, and the specific implementation mode and the like in the specification can be used to explain the content of the claims.

Claims

1. A leakage current protection plug, comprising a base (1) and a top cover (2) covering the base (1), wherein the base (1) is provided with a circuit board (3), a power cord (4), at least two electrode pins (5), and spring contacts (6) corresponding to the electrode pins (5); the base (1) is further provided with a switching device (7) for controlling the contact (6) and the electrode pins (5) to contact or disconnect, and a current transformer (11) for sensing current fluctuations, characterized in that: The spring (6) has an elastic piece (61) at the front end for contacting the electrode pin (5), a connecting piece (62) at the rear end for passing through the current transformer (11), a test conductive piece (63) extending upward in the middle of the spring (6), and a conductive through hole (31) for inserting the test conductive piece (63) on the circuit board (3). The spring (6) is an integral structure.

2. The leakage protection plug according to claim 1, characterized in that: The connecting piece (62) passes through the current transformer (11) and bends upward. The rear part of the circuit board (3) is provided with a connecting through hole (32) for inserting the end of the connecting piece (62) and a wire through hole (33) for inserting the power line (4).

3. The leakage protection plug according to any one of claims 1 or 2, characterized in that: The electrode pin (5) is provided with a first contact (51), and the end of the elastic sheet (61) is provided with a second contact (64). The switching device (7) includes an electromagnetic coil assembly (71), a push-pull rod (72), a crossarm (73), and a first return spring (74). The push-pull rod (72) is located inside the electromagnetic coil assembly (71), so that when the electromagnetic coil is working, it can pull the push-pull rod (72) to retract. The first return spring (74) is located between the electromagnetic coil assembly (71) and the push-pull rod (72), so that it can push the push-pull rod (72) to extend. The push-pull rod (72) is connected to the crossarm (73). The crossarm (73) is provided with a cross arm (731) that can push the elastic sheet (61) to swing when it moves, so that the second contact (64) contacts the first contact (51).

4. The leakage protection plug according to claim 3, characterized in that: The base (1) is provided with a reset member (75) that can slide up and down relative to it. The reset member (75) is provided with a control rod (751) that passes through the circuit board (3). A second spring (76) is provided between the circuit board (3) and the reset member (75) to push the reset member (75) to reset upward. A snap-fit ​​structure (70) is provided between the control rod (751) and the crossbeam (73) to block the reset member (75) from resetting upward when the push-pull rod (72) is extended.

5. The leakage protection plug according to claim 4, characterized in that: The upper cover (2) is provided with a reset member through hole (21) for the reset member (75) to pass through. A waterproof cover (8) is provided between the upper cover (2) and the circuit board (3). The waterproof cover (8) has a first waterproof part (81) that surrounds the control rod (751).

6. The leakage protection plug according to claim 5, characterized in that: The circuit board (3) is also provided with an indicator light (9), and the waterproof cover (8) is also provided with a second waterproof part (82) covering the indicator light (9). The upper cover (2) is provided with an indicator light through hole (22) through which the second waterproof part (82) passes.

7. The leakage protection plug according to claim 6, characterized in that: The circuit board (3) is also provided with a test button (10), and the waterproof cover (8) is also provided with a third waterproof part (83) covering the test button (10). The third waterproof part (83) is columnar and covers the test button (10). The upper cover (2) is provided with a test button through hole (23) through which the third waterproof part (83) passes. The waterproof cover (8) is an integral structure made of soft material.

8. The leakage protection plug according to claim 7, characterized in that: The upper cover (2) is provided with a surrounding plate (24) that can surround the reset component through hole (21), indicator light through hole (22), and test button through hole (23). The bottom end of the surrounding plate (24) presses the waterproof cover (8) onto the circuit board (3).

9. The leakage protection plug according to claim 8, characterized in that: The waterproof cover (8) has an upwardly protruding enclosure (84) around its edge, which surrounds the enclosure (24).

10. The leakage protection plug according to claim 5, characterized in that: The first waterproof part (81) is a cylindrical body with an opening facing downwards. The second spring (76) is set inside the cylindrical body and surrounds the control rod (751). The first waterproof part (81) has a sealing hole (811) in the middle for the control rod (751) to pass through. The first waterproof part (81) has a sealing collar (812) around the control rod (751) along the edge of the sealing hole (811). The second spring (76) is sleeved on the sealing collar (812).

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