Electrical connection protection device

Abstract

The present invention provides an electrical connection protection device, which at least includes a housing and a movement component disposed within the housing. The movement component includes a control circuit board, as well as a drive component, a leakage detection component, and an input / output component that are coupled to the control circuit board. The drive component at least includes a first drive coil and a second drive coil, and a drive iron core disposed within the first drive coil and the second drive coil. In the initial state, the drive iron core is located at a first position; when one of the first drive coil and the second drive coil operates, the drive iron core moves to a second position to connect the power connection of the input / output component; when the other of the first drive coil and the second drive coil operates, the drive iron core moves to a third position to disconnect the power connection of the input / output component. By providing two drive coils, the present invention ensures the accurate implementation of the connection or disconnection of the power connection of the input / output component, and guarantees the safety of product use.

Description

Technical Field

[0001] The present invention generally relates to the electrical field, and particularly to an electrical connection protection device. Background Art

[0002] With the continuous improvement of people's awareness of electrical safety, in order to improve the safety of electricity use, electrical connection protection devices are used more and more widely, and the application fields and usage scenarios are also continuously increasing, which puts higher requirements on the research and manufacturing of electrical connection protection devices. Existing electrical connection protection devices generally use relay coils. When the product is working properly, the coil is in the working state, with high energy consumption, high temperature rise, high cost, and may cause damage to the coil, reducing the service life of the electrical connection device. Therefore, it is necessary to design a new electrical connection protection device to make up for these defects. Summary of the Invention

[0003] The purpose of the present invention is to propose an electrical connection protection device, which is improved based on the above factors to be considered, further improving the use safety and reducing the cost.

[0004] To this end, according to the present invention, there is provided an electrical connection protection device, which at least includes a housing and a movement component disposed in the housing. The movement component includes a control circuit board, and a driving component, a leakage detection component, and an input / output component coupled to the control circuit board. Among them, the driving component at least includes a first driving coil, a second driving coil, and a driving iron core placed in the first driving coil and the second driving coil; in the initial state, the driving iron core is located at a first position; when one of the first driving coil and the second driving coil works, the driving iron core moves to a second position to connect the power connection of the input / output component; when the other of the first driving coil and the second driving coil works, the driving iron core moves to a third position to disconnect the power connection of the input / output component.

[0005] According to the above technical concept, the present invention may further include any one or more of the following optional forms.

[0006] In some optional forms, the driving iron core resets from the second position to the first position after connecting the power connection of the input / output component, and the driving iron core resets from the third position to the first position after disconnecting the power connection of the input / output component, where the first position is between the second position and the third position.

[0007] In some optional forms, the driving component further includes a driving rod that cooperates with the driving iron core, and a driver driven by the driving rod. The driver is arranged to be pivotable around its pivot axis to connect or disconnect the power connection of the input / output component.

[0008] In some alternative forms, the drive assembly further includes a drive bracket for at least receiving and connecting the driver, and a pivot hole corresponding to the pivot of the driver is provided on the drive bracket.

[0009] In some alternative forms, the drive rod and the drive iron core are connected to each other or formed integrally, wherein the drive iron core is made of a metallic material and the drive rod is made of an insulating material.

[0010] In some alternative forms, the drive assembly further includes an elastic assembly for holding the drive iron core at the first position. The elastic assembly includes a first spring abutting against one end of the drive iron core and a second spring disposed on the drive rod, and the acting directions of the first spring and the second spring are opposite.

[0011] In some alternative forms, the second spring includes a positioning end and an acting end. The positioning end is fixed by a positioning post on the drive bracket, and the acting end is embedded in a positioning hole on the drive rod.

[0012] In some alternative forms, the drive assembly further includes a latch adapted to the driver. The latch is configured to be pivotable about its pivot to lock and unlock the driver, and a pivot hole corresponding to the pivot of the latch is provided on the drive bracket.

[0013] In some alternative forms, the latch is configured to hold the driver in a locked state when the drive iron core moves to the second position, and to be pivoted by the drive rod to release the driver to an unlocked state when the drive iron core moves to the third position; wherein the latch pivots and switches between the locked state and the unlocked state through an elastic limiting piece.

[0014] In some alternative forms, the input / output assembly includes at least a pair of input contact arms and at least a pair of output contact arms. Each input contact arm is provided with an electrostatic contact, and each output contact arm is provided with a dynamic electric contact to cooperate with the electrostatic contact. The driver is provided with a drive arm for causing the dynamic electric contact to contact or disengage from the electrostatic contact.

[0015] In some alternative forms, the electrical connection protection device further includes a thermal protection assembly, and the thermal protection assembly at least includes a heat conducting sheet in contact with the input contact arm and a thermal protection switch.

[0016] In some alternative forms, the input / output assembly further includes a ground wire input contact arm provided with an electrostatic contact and a ground wire output contact arm provided with a dynamic electric contact. The leakage detection assembly is provided with a hole for a current-carrying wire to pass through and a groove for positioning the ground wire output contact arm.

[0017] The electrical connection protection device of the present invention ensures the accurate implementation of the connection or disconnection of the electrical connection of the input / output components by providing two drive coils, guaranteeing the safety of product use. The product has an optimized layout, is easy to assemble, reduces costs, improves production and processing efficiency, and has a wide range of applications. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Other features and advantages of the present invention will be better understood from the following alternative embodiments described in detail in conjunction with the drawings, in which the same reference numerals identify the same or similar components, where:

[0019] Figure 1 FIG. is a schematic external view of an electrical connection protection device according to an embodiment of the present invention;

[0020] Figure 2 FIG. is a schematic view of the drive assembly of an electrical connection protection device according to an embodiment of the present invention;

[0021] Figure 3 is Figure 1 exploded schematic view of the electrical connection protection device;

[0022] Figure 4 is Figure 2 exploded schematic view of the drive assembly of the electrical connection protection device;

[0023] Figure 5A is Figure 4 schematic view of one perspective of the drive bracket of the electrical connection protection device in ;

[0024] Figure 5B is Figure 4 schematic view of another perspective of the drive bracket of the electrical connection protection device in ;

[0025] Figure 6A is Figure 2 schematic view of the working state of the drive assembly of the electrical connection protection device in after being turned on;

[0026] Figure 6B is Figure 2 schematic view of the working state of the drive assembly of the electrical connection protection device in after being turned off;

[0027] Figure 6C is Figure 2 schematic view of the working state of the drive assembly of the electrical connection protection device in when it is turned on;

[0028] Figure 6D is Figure 2 schematic view of the working state of the drive assembly of the electrical connection protection device in when it is turned off;

[0029] Figure 7 FIG. is a schematic circuit diagram of an electrical connection protection device according to an embodiment of the present invention. Detailed implementation manners

[0030] The implementation and use of the embodiments will be discussed in detail below. However, it should be understood that the specific embodiments discussed are merely exemplary illustrations of specific ways of implementing and using the present invention, rather than limiting the scope of the present invention. When describing the structural positions of various components, expressions of directions such as up, down, top, bottom, etc. are not absolute but relative. When the components are arranged as shown in the figures, these direction expressions are appropriate, but when the positions of the components in the figures change, these direction expressions also change accordingly.

[0031] In this document, terms such as "coupled" and "connected" should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; "coupled" can be a direct connection or an indirect connection through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in this document can be understood according to specific circumstances.

[0032] In the illustrated embodiment, a plug is taken as an example. However, it should be understood that any other electrical connection protection device applicable to the inventive concept is not excluded.

[0033] First, refer to Figure 1 , the electrical connection protection device of the present invention includes a housing and a movement assembly disposed within the housing. The housing may include an upper cover 7A and a base 7B that are fixedly connected together by a plurality of fasteners or mechanical structures such as snap connections. In some embodiments, the electrical connection protection device may include a reset assembly and a test assembly. The reset assembly is used to control the movement assembly to turn on the power supply and includes a reset button 7C disposed outside the housing. The test assembly is used to simulate and test the leakage current and includes a test button 7D disposed outside the housing. The reset button 7C and the test button 7D may protrude from the upper cover 7A.

[0034] Combined with Figure 2 and Figure 3As shown, the movement mechanism assembly includes a control circuit board (PCB) 6, as well as a driving assembly 1, a leakage detection assembly 5, and an input / output assembly coupled to the control circuit board 6. Among them, the input / output assembly includes at least a pair of input contact arms and at least a pair of output contact arms. For example, the input contact arms include a live wire (L) plug piece 81 and a neutral wire (N) plug piece 82, and each input contact arm respectively includes an electrostatic contact 81A, 82A; correspondingly, the output contact arms include an L contact arm 2 and an N contact arm 3, and each output contact arm respectively includes a dynamic electric contact 2A, 3A. Optionally, in some embodiments, the input / output assembly may further include a ground wire (PE) plug piece 83 and a PE contact arm 4. The PE plug piece 83 is provided with an electrostatic contact 83A, and the PE contact arm 4 is provided with a corresponding dynamic electric contact 4A. The L plug piece 81, the N plug piece 82, and the PE plug piece 83 extend out of the base 7B, and the L contact arm 2, the N contact arm 3, and the PE contact arm 4 are connected to the output wire or the load terminal via the L connection terminal 2B, the N connection terminal 3B, and the PE connection terminal 4B.

[0035] Combined Figure 4 , according to the concept of the present invention, the driving assembly 1 of the electrical connection protection device includes at least a first driving coil 121 and a second driving coil 122, and a driving iron core 14 disposed within the first driving coil 121 and the second driving coil 122, so as to respectively realize the connection or disconnection of the electrical connection of the input / output assembly through the two driving coils, effectively avoiding failure and ensuring the use safety. In addition, although two driving coils are provided, due to the reasonable design of the movement modes of the components in the driving assembly, the layout mode of the present invention will not have a great impact on the overall size of the product, meeting the design trend of miniaturization, which will be reflected in the following specific description.

[0036] In some embodiments, the driving iron core 14 can be set to be located at the first position A (for example Figure 6A 、 Figure 6B ) in the initial state, that is, the static position. When one of the first driving coil 121 and the second driving coil 122 works, the driving iron core 14 moves to the second position B (for example Figure 6C ) in response to the magnetic field of the driving coil to connect the electrical connection of the input / output assembly; when the other of the first driving coil 121 and the second driving coil 122 works, the driving iron core 14 also moves to the third position C (for example Figure 6D ) in response to the magnetic field of the driving coil to disconnect the electrical connection of the input / output assembly.

[0037] In some embodiments, the driving iron core 14 is reset from the second position B to the first position A after the power connection of the input-output component is connected, and the driving iron core 14 is reset from the third position C to the first position A after the power connection of the input-output component is disconnected, where the first position A is between the second position B and the third position C. In this way, it helps to make the internal part layout of the product more reasonable and compact, and reduces the overall size of the product.

[0038] To enable the movement of the driving iron core 14 to promote the connection or disconnection of the power connection of the input-output component, the driving assembly 1 further includes a driving rod 15 that cooperates with the driving iron core 14, and a driver 16 driven by the driving rod 15. The driving rod 15 can be connected to or formed integrally with the driving iron core 14. As an option, the driving iron core 14 is made of a metal material, and the driving rod 15 can be made of an insulating material.

[0039] As can be seen from Figure 4 , the driving rod 15 can pass through the driving rod hole 162 on the driver 16 and is provided with a limiting end 151 with an enlarged size, so as to drive the driver 16 to move synchronously with the movement of the driving iron core 14. Advantageously, the driver 16 is arranged to be pivotable about its pivot shafts 161A, 161B. For this purpose, the driving assembly 1 further includes a driving bracket 11 to at least receive and connect the driver 16. Combining Figure 5A and Figure 5B , pivot holes 110A, 110B corresponding to the pivot shafts 161A, 161B of the driver 16 are provided on the driving bracket 11. In addition, the driver 16 is further provided with a driving arm 164 that causes the moving electrical contacts 2A, 3A and / or 4A to contact or separate from the static electrical contacts 81A, 82A and / or 83A.

[0040] The driving assembly 1 further includes a latch 17 adapted to the driver 16. The latch 17 is arranged to be pivotable about its pivot shafts 171A, 171B to lock and unlock the driver 16. Correspondingly, pivot holes 111A, 111B corresponding to the pivot shafts 171A, 171B of the latch 17 are provided on the driving bracket 11 to receive and connect the latch 17. Here, the locking and unlocking of the latch 17 to the driver 16 means that the latch 17 can hold the driver 16 in a locked state when the driving iron core 14 moves to the second position B, and is driven by the driving rod 15 to pivot to release the driver 16 to the unlocked state when the driving iron core 14 moves to the third position C.

[0041] To achieve the above effects, the latch 17 can be pivotally switched between the locked state and the unlocked state through the elastic limiting piece 18. In some embodiments, refer to Figure 4, a resilient tab slot 172 may be provided on the latch 17, and the resilient limiting tab 18 may be embedded in the resilient tab slot 172 to provide an elastic force to urge the latch 17 to move and reset. Meanwhile, a latch end 173 is provided on the latch 17, which is adapted to a driving latch end 163 provided on the driver 16, and the interlock and release are achieved through the contact abutment or separation contact between them. When the driver 16 pivots along its pivot shafts 161A, 161B to interlock the latch end 173 and the driving latch end 163, the driving arm 164 can lift the carried L contact arm 2, N contact arm 3 and / or PE contact arm 4, so that the moving electrical contact contacts the static electrical contact, realizing the electrical connection of the input / output assembly. On the contrary, the electrical connection of the input / output assembly is disconnected.

[0042] It can also be seen from Figure 4 that the drive assembly 1 further includes an elastic assembly for holding the drive iron core 14 in the first position A. The elastic assembly includes a first spring 13 abutting against one end of the drive iron core 14 and a second spring 19 arranged on the drive rod 15. In some embodiments, the second spring 19 may include a positioning end 192 and an acting end 191. The positioning end 192 may be fixed by a positioning post 112 on the drive bracket 11, and the acting end 191 is embedded in a positioning hole 152 on the drive rod 15. Advantageously, the acting directions of the first spring 13 and the second spring 19 are opposite, so as to hold the drive iron core 14 in the intermediate first position A statically.

[0043] In some embodiments, as Figure 3 shown, the leakage detection component (CT) 5 is provided with a hole 5A for the load current line to pass through to detect whether there is a leakage current on the passed load current line. In some embodiments, the leakage detection component 5 may also be provided with a groove 5B for positioning the PE contact arm 4 to facilitate parameter adjustment and production and processing.

[0044] In some embodiments, the L plug piece 81, N plug piece 82 and PE plug piece 83 may be received and fixed by a plug piece bracket 8, and the plug piece bracket 8 is correspondingly provided with receiving holes or grooves. In some embodiments, the electrical connection protection device may further include a thermal protection component, and the thermal protection component at least includes heat conducting pieces 81B, 82B contacting the L plug piece 81, N plug piece 82 and a thermal protection switch 85. The heat conducting pieces 81B, 82B and the thermal protection switch 85 may be limited and fixed to the plug piece bracket 8, and the temperatures of the N plug piece 82 and L plug piece 81 are conducted to the thermal protection switch 85 through the heat conducting pieces 81B, 82B. When the temperatures of the N plug piece 82 and L plug piece 81 exceed the set value of the thermal protection switch 85, the electrical connection between the inputs is disconnected.

[0045] The following combines Figures 6A to 7 to describe the working principle of the electrical connection protection device of the present invention.

[0046] In the initial state or static state, due to the action of the first spring 13 and the second spring 19, the driving iron core 14 is in the first position A, as Figure 6A and Figure 6B . Among them, Figure 6A is the working schematic diagram after the driving component is turned on, Figure 6B is the working schematic diagram after the driving component is turned off, and the driving iron core 14 is reset to the first position A.

[0047] When the power is turned on, the driving coil assembly SOL1 is energized. For example, the first driving coil 121 generates a magnetic field, as Figure 6C shown. The driving iron core 14 moves from the initial position shown by the dotted line to the second position B to the right and compresses the first spring 13, thereby driving the driving rod 15, and further driving the driver 16 to pivot counterclockwise along its pivot 161B. At this time, due to the force exerted by the elastic limiting piece 18 on the latch 17, the driving latch end 163 is urged to engage with the latch end 173, so that the driving arm 164 is lifted and maintained in the locked state, closing the static electrical contacts 81A, 82A, 83A and the moving electrical contacts 2A, 3A, 4A to achieve the electrical connection between the input and the output. According to Figure 7 the schematic diagram, when the power supply at the load end is turned on, the processor U2 drives the transistor Q3 to conduct, and SOL1 loses power. Due to the action of the first spring 13, the driving iron core 14 resets to the first position A, that is, Figure 6A shown, and the electrical connection protection device works normally.

[0048] When the leakage detection component CT detects a leakage current in L and N, CT transmits the detected leakage current signal to the processor U1. If the leakage current exceeds the set value, U1 issues a signal to drive the thyristor Q2 to conduct, so that the driving coil assembly SOL2 is energized. For example, the second driving coil 122 generates a magnetic field, as Figure 6D shown. The driving iron core 14 moves from the initial position shown by the dotted line to the third position C to the left. The driving rod 15 conducts the force to the latch 17, causing the latch 17 to pivot counterclockwise along its pivot, thereby pressing the elastic limiting piece 18 downward to compress, and urging the driving latch end 163 to disengage from the latch end 173. Due to the release of the resilience of the contact arms 2, 3, and 4, the driver 16 pivots clockwise along its pivot 161, the driving arm 164 drops, and the static electrical contacts 81A, 82A, 83A and the moving electrical contacts 2A, 3A, 4A are disconnected, thereby disconnecting the electrical connection between the input and the output. At the same time, due to the action of the first spring 13 and the second spring 19, the driving iron core 14 resets to the first position A, that is, Figure 6B shown, and the electrical connection protection device stops working.

[0049] It should be understood that the embodiments shown in the figures only display the optional shapes, sizes, and arrangements of the various optional components of the electrical connection protection device according to the present invention. However, they are only illustrative and not restrictive. Without departing from the spirit and scope of the present invention, other shapes, sizes, and arrangements can also be adopted.

[0050] The technical content and features of the present invention have been disclosed above. However, it can be understood that under the creative concept of the present invention, those skilled in the art can make various changes and improvements to the above-disclosed concept, but they all fall within the protection scope of the present invention. The description of the above embodiments is illustrative rather than restrictive, and the protection scope of the present invention is determined by the claims.

Claims

1. An electrical connection protection device, at least comprising a housing and a movement assembly disposed within the housing, the movement assembly including a control circuit board (6), as well as a drive assembly (1), a leakage detection assembly (5), and an input / output assembly coupled to the control circuit board (6), characterized in that, The driving assembly (1) at least includes a first driving coil (121) and a second driving coil (122), a driving iron core (14) disposed within the first driving coil (121) and the second driving coil (122), a driving rod (15) that cooperates with the driving iron core (14), and a driver (16) driven by the driving rod (15). The driving assembly (1) further includes a latch (17) adapted to the driver (16); In the initial state, the driving iron core (14) is located at the first position (A); When one of the first driving coil (121) and the second driving coil (122) operates, the driving iron core (14) moves to the second position (B) to connect the power connection of the input-output assembly, and the latch (17) is configured to hold the driver (16) in the locked state when the driving iron core (14) moves to the second position (B); When the other of the first driving coil (121) and the second driving coil (122) operates, the driving iron core (14) moves to the third position (C) to disconnect the power connection of the input-output assembly, and the latch (17) is configured to be driven by the driving rod (15) to release the driver (16) to the unlocked state when the driving iron core (14) moves to the third position (C), wherein the first position (A) is between the second position (B) and the third position (C).

2. The electrical connection protection device according to claim 1, wherein The driver (16) is configured to be pivotable about its pivot shafts (161A, 161B) to connect or disconnect the power connection of the input-output assembly.

3. The electrical connection protection device according to claim 2, wherein The driving assembly (1) further includes a driving bracket (11) to at least receive and connect the driver (16), and pivot holes (110A, 110B) corresponding to the pivot shafts (161A, 161B) of the driver (16) are provided on the driving bracket (11).

4. The electrical connection protection device according to claim 1, characterized in that, The driving rod (15) and the driving iron core (14) are connected to each other or formed as one body. Among them, the driving iron core (14) is made of a metal material, and the driving rod (15) is made of an insulating material.

5. The electrical connection protection device according to claim 3, characterized in that, The driving assembly (1) further includes an elastic component that holds the driving iron core (14) at the first position (A). The elastic component includes a first spring (13) abutting against one end of the driving iron core (14), and a second spring (19) disposed on the driving rod (15). The acting directions of the first spring (13) and the second spring (19) are opposite.

6. The electrical connection protection device according to claim 5, characterized in that, The second spring (19) includes a positioning end (192) and an acting end (191). The positioning end (192) is fixed by a positioning post (112) on the driving bracket (11), and the acting end (191) is embedded in a positioning hole (152) on the driving rod (15).

7. The electrical connection protection device according to claim 5, characterized in that, After the driving iron core (14) is electrically connected to the input / output assembly, it is reset from the second position (B) to the first position (A) under the action of the first spring (13), and after the driving iron core (14) is disconnected from the input / output assembly, it is reset from the third position (C) to the first position (A) under the action of the first spring (13) and the second spring (19).

8. The electrical connection protection device according to claim 3, characterized in that The latch (17) is arranged to be pivotable about its pivot shafts (171A, 171B) to lock and unlock the driver (16), and pivot holes (111A, 111B) corresponding to the pivot shafts (171A, 171B) of the latch (17) are provided on the driving bracket (11).

9. The electrical connection protection device according to claim 8, characterized in that, The latch (17) is pivotally switched between the locked state and the unlocked state by an elastic limiting piece (18).

10. The electrical connection protection device according to any one of claims 2 to 9, characterized in that, The input / output assembly includes at least a pair of input contact arms (81, 82) and at least a pair of output contact arms (2, 3). Each input contact arm (81, 82) is provided with an electrostatic contact (81A, 82A), and each output contact arm (2, 3) is provided with a dynamic contact (2A, 3A) to cooperate with the electrostatic contact (81A, 82A). The driver (16) is provided with a driving arm (164) for causing the dynamic contact (2A, 3A) to contact or separate from the electrostatic contact (81A, 82A).

11. The electrical connection protection device according to claim 10, characterized in that, The electrical connection protection device further includes a thermal protection component, and the thermal protection component at least includes heat-conducting sheets (81B, 82B) in contact with the input contact arms (81, 82) and a thermal protection switch (85).

12. The electrical connection protection device according to claim 10, characterized in that, The input / output assembly further includes a ground wire input contact arm (83) provided with an electrostatic contact (83A) and a ground wire output contact arm (4) provided with a dynamic contact (4A). The leakage detection component (5) is provided with a hole (5A) for a current-carrying wire to pass through and a groove (5B) for positioning the ground wire output contact arm (4).

Images