Leakage protection device

Abstract

The utility model relates to a leakage protection device which comprises an upper cover and a base which are covered with each other, a swing seat is movably arranged in the upper cover, a rotating shaft is integrally formed on the swing seat, the rotating shaft is movably matched in a limiting groove of an upper cover limiting plate, the left side and the right side of the swing seat are both fixedly connected with movable contact pieces, and the left side and the right side of the upper cover are both provided with static contact pieces. A first spring is arranged between the swing seat and the base, the first spring is located on the front side of the rotating shaft and used for abutting against the swing seat upwards, a lock catch seat located on the front side of the swing seat is arranged in the upper cover, and a limiting step used for allowing the front side of the swing seat to be clamped in is arranged on the lock catch seat. When the front side of the swing seat is located in the limiting step, a movable contact of the movable contact piece abuts against a static contact of the static contact piece, a trip coil assembly is fixedly arranged on the lower side of the base, and the trip coil assembly is used for pushing the lock catch seat to enable the front side of the swing seat to be separated from the limiting step. And the working stability and safety of the device are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of circuit protection, in particular to a leakage protection device. Background Art

[0002] In a low-voltage power distribution system, a leakage protection device is an important safety electrical appliance for detecting the residual current in a circuit and timely cutting off the faulty circuit, and is widely used in power consumption environments such as homes, industries, and public facilities to prevent personal electric shock accidents and electrical fires caused by leakage.

[0003] The existing leakage protection devices generally include a housing structure composed of an upper cover and a base, and internally provided with a seat body that can move up and down, a contact system in which a moving contact cooperates with a static contact, and the closing and opening of the contacts are realized through a locking mechanism. The common locking mechanisms generally use a locking plate or a snap structure to lock the swinging seat to keep it in the closed state; when the tripping mechanism operates, the locking is released, and the seat body moves under the action of the return spring, driving the moving contact to separate from the static contact, thereby realizing power-off protection.

[0004] However, the locking structures in the prior art often have problems such as insecure locking, insufficiently sensitive tripping response, and unstable operation, resulting in possible malfunction or unreliable disconnection during the actual use of the product, affecting the working reliability and safety of the leakage protection device. Therefore, there is an urgent need to provide a leakage protection device with a reasonable structural design, stable operation, and reliable locking to meet the growing electrical safety requirements. Summary of the Utility Model

[0005] The utility model provides a leakage protection device with stable and reliable operation, solving the above problems existing in the prior art during use.

[0006] The technical solution of the utility model is implemented as follows: a leakage protection device, including an upper cover and a base that cover each other, a swing seat movably arranged in the upper cover, a rotating shaft is integrally formed at the middle position of the left and right sides of the swing seat, a limiting plate is integrally formed on the upper cover corresponding to the rotating shaft, and a limiting groove for the movable engagement of the rotating shaft is provided on the limiting plate, a moving contact piece is fixedly connected to the left and right sides of the swing seat, a moving contact point is provided at the rear end of the moving contact piece, and a static contact piece is provided on the left and right sides of the upper cover, and the static contact piece extends into the rear position of the upper cover and is positioned On the upper side of the moving contact, the static contact piece is provided with a static contact for contacting with the moving contact, a first spring is provided between the swing seat and the base, the first spring is located on the front side of the rotating shaft and is used to form an upward resistance to the swing seat, a lock seat is provided in the upper cover and is located on the front side of the swing seat, a limiting step is provided on the lock seat for the front side of the swing seat to be inserted, when the front side of the swing seat is located in the limiting step, the moving contact contacts with the static contact, and a tripping coil assembly is fixedly provided on the lower side of the base, and the tripping coil assembly is used to push the lock seat to make the front side of the swing seat escape from the limiting step.

[0007] Preferably, a second spring is provided between the front side of the lock seat and the upper cover, and the second spring is used to push the lock seat to abut against the swing seat.

[0008] Preferably, the lock seat is provided with a lock shaft on the upper part of the left and right sides thereof, a shaft groove with an opening facing downward is opened in the upper cover, the lock shaft is located in the shaft groove, and a vertical plate extending upward to the lower side of the shaft groove is provided on the base, and the vertical plate forms a blockage for the lower side of the lock shaft located in the shaft groove.

[0009] Preferably, a reset button is provided on the upper cover, and a pressure rod located above the swing seat is provided on the reset button.

[0010] Preferably, the upper cover is provided with a button opening, and buckle grooves are provided on both sides of the button opening. The upper cover is integrally formed with a spring support plate at the bottom of the button opening, the reset button is movably engaged in the button opening up and down, the reset button is provided with a buckle that movably engages in the buckle groove, the pressure rod passes downward through the spring support plate, and a third spring is provided between the spring support plate and the reset button.

[0011] Preferably, the tripping coil assembly includes a tripping coil, a thimble and a sliding ring, one end of the thimble movably fits in the tripping coil and the other end passes through the tripping coil and is connected to the sliding ring, the sliding ring corresponds to the rear side of the lower end of the lock seat, and a fourth spring is provided in the thimble and the tripping coil.

[0012] Preferably, a release button is provided on the upper cover for causing the sliding ring to push the lock seat to move forward.

[0013] In summary, the beneficial effects of the present invention are:

[0014] 1. The utility model provides a leakage protection device, which is provided with a swing seat in the upper cover, and a rotating shaft is provided on both sides of the swing seat to cooperate with the limit groove on the limit plate, so that the swing seat can swing flexibly. At the same time, the first spring is used to form a support on the swing seat upward, and the limit step on the front side of the lock seat is used to clamp the front side of the swing seat, ensuring that the moving contact and the static contact are in conflict, thereby achieving the closure of the circuit. When the trip coil assembly is actuated, it can push the lock seat to make the front side of the swing seat escape from the limit step, so that the front side of the swing seat swings upward when the first spring swings, so that the rear lower part of the swing seat will swing downward, disconnecting the contact between the moving contact and the static contact, ensuring the ability to respond quickly and reliably cut off the circuit, and improving the working stability and safety of the device.

[0015] 2. A second spring is added between the front side of the lock seat and the upper cover to push the lock seat against the swing seat, thereby enhancing the contact stability of the front side of the swing seat stuck on the limiting step of the lock seat, ensuring close contact between the moving contact and the static contact when the tripping is not triggered, and further improving the reliability of the device.

[0016] 3. By arranging locking shafts on the upper parts of the left and right sides of the locking seat, opening a shaft groove with an opening facing downward in the upper cover, and arranging a vertical plate extending upward to the lower side of the shaft groove on the base, a barrier is formed on the lower side of the locking shaft in the shaft groove, thereby increasing the stability of the locking seat structure and facilitating the installation of the locking seat.

[0017] 4. A reset button is set on the upper cover, and a pressure rod is provided on it above the swing seat. The reset button can be manually operated when needed. The pressure rod applies pressure to the swing seat to help restore the closed state of the contact system, providing a convenient manual reset function, which is convenient for users to use and increases operational flexibility. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0019] Figure 1 It is a schematic diagram of the structure of the utility model;

[0020] Figure 2 for Figure 1 Schematic diagram of the structure when observed from another angle;

[0021] Figure 3Schematic diagram of the structure of the present utility model after removing the upper cover and the base;

[0022] Figure 4 Schematic diagram of the structures of the swing seat, the moving contact piece and the locking seat in the present utility model;

[0023] Figure 5 For Figure 4 Schematic diagram of the structure after exploding the moving contact piece;

[0024] Figure 6 Schematic diagram of the structures of the swing seat and the locking seat installed in the upper cover in the present utility model;

[0025] Figure 7 Schematic diagram of the structure of the base in the present utility model;

[0026] Figure 8 Schematic sectional view of the present utility model when the tripping button is an electronic tripping button;

[0027] Figure 9 Schematic sectional view of the present utility model when the tripping button is a manual tripping button.

[0028] In the figure: 1. Upper cover; 11. Limiting plate; 12. Limiting groove; 13. Shaft groove; 14. Button opening; 15. Buckling groove; 16. Spring support plate; 2. Base; 21. Vertical plate; 3. Swing seat; 31. Rotating shaft; 32. First spring; 4. Moving contact piece; 41. Moving contact point; 5. Static contact piece; 51. Static contact point; 6. Locking seat; 61. Limiting step; 62. Locking shaft; 63. Second spring; 7. Reset button; 71. Pressing rod; 72. Buckle; 73. Third spring; 8. Tripping coil; 81. Thimble; 82. Sliding ring; 83. Fourth spring; 91. Electronic tripping button; 92. Manual tripping button. Detailed implementation manners

[0029] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the appended Figures 1-9 drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. Based on the embodiments in the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0030] Embodiment:

[0031] As Figures 1 to 9As shown, the utility model discloses a leakage protection device, including an upper cover 1 and a base 2 that cover each other, a swing seat 3 is movably arranged in the upper cover 1, and the swing seat 3 can swing up and down around its own axis. Specifically, both left and right sides of the swing seat 3 are integrally formed with a rotating shaft 31 at the middle position thereof, and the upper cover 1 is integrally formed with a limiting plate 11 corresponding to the rotating shaft 31, and a limiting groove 12 for the rotating shaft 31 to be movably engaged is provided on the limiting plate 11, and the limiting plate 11 is used to cooperate with the rotating shaft 31 so that the swing seat 3 can flexibly swing in the limiting groove 12, and moving contact pieces 4 are fixedly connected to the left and right sides of the swing seat 3, and a moving contact point 41 is arranged at the rear end of the moving contact piece 4, and correspondingly, both left and right sides of the upper cover 1 are provided with static contact pieces 5, and the static contact pieces 5 extend into the rear side position inside the upper cover 1 and are located on the upper side of the moving contact 41. A static contact 51 for contacting the moving contact 41 is provided on the static contact piece 5. In addition, a first spring 32 is provided between the swing seat 3 and the base 2. The first spring 32 is located on the front side of the rotating shaft 31 and is used to form a resistance against the swing seat 3 upward. A lock seat 6 located on the front side of the swing seat 3 is provided in the upper cover 1. A limiting step 61 is provided on the lock seat 6 for the front side of the swing seat 3 to be inserted. When the front side of the swing seat 3 is located in the limiting step 61, the moving contact 41 is in conflict with the static contact 51 (because the front side of the swing seat 3 is pressed downward, the rear side of the swing seat 3 will tilt upward, so that the moving contact 41 is in contact with the static contact 51). In addition, a tripping coil assembly is fixedly provided on the lower side of the base 2. The tripping coil assembly is used to push the lock seat 6 forward, so that the front side of the swing seat 3 is out of the limiting step 61.

[0032] It should be noted that a circuit board is provided on the lower side of the base 2, and the trip coil 8 is electrically connected to the circuit board. A current transformer is also provided on the circuit board, and the moving contact piece 4 extends through the current transformer and is connected to the power terminal on the circuit board, while the static contact piece 5 is electrically connected to the load terminal on the circuit board. The current flows from the power terminal through the moving contact piece 4 through the current transformer, and then is transmitted to the load terminal to form a complete power supply circuit. When a leakage fault occurs, the current transformer senses the unbalanced current and outputs a signal to control the trip coil 8 to operate. The above-mentioned circuit board, current transformer, power terminal and load terminal are all existing technologies. The functions they want to achieve and the circuit connection are supported by a large number of mature technologies. This application does not involve improvements in this area, so it will not be elaborated here.

[0033] In the present utility model, a second spring 63 is provided between the front side of the latch seat 6 and the upper cover 1. The second spring 63 is used to push the latch seat 6 against the swing seat 3. The second spring 63 pushes the latch seat 6, so that the swing seat 3 is stably stuck on the limiting step 61 of the latch seat 6, ensuring the reliability of the latch structure, preventing unplanned tripping caused by vibration or malfunction. Additionally, in the case of tripping, when the user presses down the swing seat 3, the second spring 63 can push the latch seat 6 to automatically pass through the limiting step 61 and latch the swing seat 3.

[0034] In the present utility model, the tripping coil 8 assembly specifically includes a tripping coil 8, a thimble 81 and a sliding ring 82. One end of the thimble 81 is movably fitted in the tripping coil 8, and the other end passes through the tripping coil 8 and is connected to the sliding ring 82. The sliding ring 82 is correspondingly oriented towards the rear side of the lower end of the latch seat 6. A fourth spring 83 is provided between the thimble 81 and the tripping coil 8. The fourth spring 83 is used to maintain the reset state of the thimble 81 in the non-triggered state. When a leakage fault occurs, the current transformer detects an abnormal residual current and feeds back a signal to the control circuit. The tripping coil 8 is energized and actuated, pushing the thimble 81 to move forward while compressing the fourth spring 83, driving the sliding ring 82 to move synchronously, and then pushing the latch seat 6 to move forward, so that the front side of the swing seat 3 is disengaged from the limiting step 61. Therefore, the first spring 32 will push the front side of the swing seat 3 to move upward, and the rotating shaft 31 is restricted by the upper side of the limiting groove 12, resulting in the rear side of the swing seat 3 swinging downward, thereby realizing the rapid separation of the moving contact 41 and the static contact 51 and cutting off the circuit.

[0035] To enhance the stability of the operation of the latch seat 6, latch shafts 62 are provided on both upper left and right sides of the latch seat 6. An axially grooved 13 with an opening facing downward is formed in the upper cover 1. The latch shafts 62 are located in the axially grooved 13. At the same time, a vertical plate 21 extending upward to the lower side of the axially grooved 13 is provided on the base 2. The vertical plate 21 forms a block against the lower side of the latch shafts 62 located in the axially grooved 13. This structure increases the stability of the structure of the latch seat 6 and also facilitates the installation of the latch seat 6.

[0036] In the present utility model, a reset button 7 is provided on the upper cover 1, and a pressing rod 71 located above the swing seat 3 is provided on the reset button 7. When the present utility model is in the tripped state, by pressing the reset button 7, the pressing rod 71 can push the front side of the swing seat 3 to rotate downward, and re-engage the front side of the swing seat 3 into the limiting step 61 of the latch seat 6, restoring the conduction state of the circuit.

[0037] The specific structure of the reset button 7 provided on the upper cover 1 is as follows: a button opening 14 is provided on the upper cover 1, and the upper cover 1 is further provided with buckling grooves 15 on both sides of the button opening 14. At the same time, a spring support plate 16 is integrally formed at the bottom of the button opening 14 on the upper cover 1. The reset button 7 is movably fitted up and down in the button opening 14, and a buckle 72 movably fitted in the buckling groove 15 is provided on the reset button 7. The buckle 72 prevents the reset button 7 from disengaging from the button opening 14, and the pressing rod 71 passes downward through the spring support plate 16. In addition, a third spring 73 is provided between the spring support plate 16 and the reset button 7, and the third spring 73 is used to provide an upward reset elastic force for the reset button 7.

[0038] In the present utility model, a release button for enabling the sliding ring 82 to push the lock seat 6 forward is provided on the upper cover 1. The release button can be, for example, Figure 8 the electronic release button 91 as shown. The electronic release button 91 is electrically connected to the circuit board. By pressing the electronic release button 91, a signal is transmitted to the circuit board, and the circuit board controls the release coil 8 to drive the ejector pin 81 and the sliding ring 82 to push the lock seat 6, thereby performing release.

[0039] In addition, the release button can also be, for example, Figure 9 the manual release button 92 as shown. The user presses the manual release button 92 to drive the sliding ring 82 to push the lock seat 6, thereby performing forced release.

[0040] It should be noted that the present utility model, the circuit board, the current transformer, the power supply terminal, and the load terminal, etc. will all be installed in a leakage protector housing. The reset button 7 is exposed from the leakage protector housing. When using the electronic release button 91, the electronic release button 91 is fixed in the leakage protector housing, and a button for pressing the electronic release button 91 is movably provided on the leakage protector housing. When using the manual release button 92, the manual release button 92 is movably provided up and down on the leakage protector housing, and the upper end of the manual release button 92 is located on the upper side of the leakage protector housing.

[0041] At the same time, it should be pointed out that the terms used in the present utility model, such as "front", "rear", "vertical", "horizontal", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation on the protection scope of the present utility model.

[0042] The above are only the preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included in the protection scope of the present utility model.

Claims

1. A leakage protection device, characterized in that: The invention comprises an upper cover and a base which cover each other, a swing seat being movably arranged in the upper cover, a rotating shaft being integrally formed at the middle position on both the left and right sides of the swing seat, a limiting plate being integrally formed on the upper cover corresponding to the rotating shaft, a limiting groove for the movable cooperation of the rotating shaft being provided on the limiting plate, a moving contact piece being fixedly connected to the left and right sides of the swing seat, a moving contact point being provided at the rear end of the moving contact piece, a static contact piece being provided on the left and right sides of the upper cover, the static contact piece extending into the rear side of the upper cover and being located at the upper side of the moving contact, and a static contact piece on the static contact piece A static contact for contacting with the moving contact is provided, a first spring is provided between the swing seat and the base, the first spring is located on the front side of the rotating shaft and is used to form an upward resistance to the swing seat, a lock seat is provided in the upper cover and is located on the front side of the swing seat, a limiting step is provided on the lock seat for the front side of the swing seat to be inserted, when the front side of the swing seat is located in the limiting step, the moving contact contacts with the static contact, and a tripping coil assembly is fixedly provided on the lower side of the base, and the tripping coil assembly is used to push the lock seat to make the front side of the swing seat escape from the limiting step.

2. A leakage protection device according to claim 1, characterized in that: A second spring is provided between the front side of the lock seat and the upper cover, and the second spring is used for pushing the lock seat to abut against the swing seat.

3. A leakage protection device according to claim 2, characterized in that: The lock seat is provided with a lock shaft on the upper part of the left and right sides thereof, a shaft groove opening downward is opened in the upper cover, the lock shaft is located in the shaft groove, and a vertical plate extending upward to the lower side of the shaft groove is provided on the base, the vertical plate forms a blockage for the lower side of the lock shaft located in the shaft groove.

4. The leakage protection device according to claim 2, characterized in that: The upper cover is provided with a reset button, and the reset button is provided with a pressure rod located above the swing seat.

5. An earth leakage protection device according to claim 4, characterized in that: The upper cover is provided with a button opening, and buckle grooves are provided on both sides of the button opening. A spring support plate is integrally formed at the bottom of the button opening of the upper cover. The reset button is movably engaged in the button opening up and down, and a buckle that is movably engaged in the buckle groove is provided on the reset button. The pressure rod passes downward through the spring support plate, and a third spring is provided between the spring support plate and the reset button.

6. The leakage protection device according to claim 2, characterized in that: The tripping coil assembly includes a tripping coil, a thimble and a sliding ring. One end of the thimble is movably engaged in the tripping coil, and the other end passes through the tripping coil and is connected to the sliding ring. The sliding ring corresponds to the rear side of the lower end of the lock seat. A fourth spring is provided in the thimble and the tripping coil.

7. A leakage protection device according to claim 6, characterized in that: The upper cover is provided with a release button used for enabling the sliding ring to push the lock seat to move forward.

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