Arc fault circuit breaking device

Abstract

The utility model discloses an arc fault circuit breaking device, which comprises a middle shell, a first operating mechanism and a second operating mechanism, the first operating mechanism and the second operating mechanism are respectively arranged on two sides of the middle shell, the first operating mechanism comprises a contact supporting piece, a moving contact and a static contact, the contact supporting piece is connected with the moving contact, and the static contact is connected with the moving contact. The contact support drives the moving contact to move along a first axial direction, the static contact is fixed on the middle shell, the contact support member comprises a rotating member and a driving spring, a first connecting rod extending from one end of the driving spring is connected with the rotating member, and a second connecting rod extending from the other end of the driving spring is connected with the moving contact. The first operating mechanism uses the contact supporting piece to drive the spring to rotate so as to drive the moving contact to move, so that the conduction mode of the first operating mechanism is simplified, the mechanical structure of the first operating mechanism is simplified, the production material of the first mechanism is saved, and the installation space required by the first mechanism is reduced.

Description

Technical Field

[0001] This utility model relates to the field of circuit control technology, and in particular to an arc fault circuit breaking device. Background Technology

[0002] The center temperature of a fault arc is extremely high, and metal spatter occurs, posing a significant fire hazard. When a parallel arc occurs, the live and neutral wires are not in direct contact; they only become contacted due to aging or damage to the insulation. However, the distance between the live and neutral wires is very short, causing the current to break down the air between them, resulting in a discharge and spark. Therefore, it is crucial to disconnect the power supply promptly when an arc fault occurs. Currently, in arc fault circuit breakers, the N-pole mechanism uses a similar mechanical structure to the L-pole mechanism. This makes the N-pole mechanism more complex, leading to higher production costs and requiring more installation space. Utility Model Content

[0003] To overcome the above-mentioned shortcomings, the purpose of this utility model is to provide an arc fault circuit interrupter. The first operating mechanism drives the spring to rotate by using a contact support member, thereby driving the moving contact to move. This simplifies the conduction method of the first operating mechanism, simplifies the mechanical structure of the first operating mechanism, saves production materials for the first mechanism, and reduces the installation space required for the first mechanism. By using a rotating member to push the limiting protrusion through the limiting groove, the moving contact is pushed, causing the moving contact to disconnect from the stationary contact, thus achieving the effect of resetting the first operating mechanism. By using a partition to isolate the remaining space at the first operating mechanism end of the middle shell from the first operating mechanism, the utilization rate of the remaining space is improved. At the same time, the partition can also isolate the arc and prevent the arc from escaping from the first operating mechanism.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is: an arc fault circuit interrupter, comprising a middle shell, a first operating mechanism, and a second operating mechanism, wherein the first operating mechanism and the second operating mechanism are respectively disposed on both sides of the middle shell, wherein:

[0005] The first operating mechanism includes a contact support, a moving contact, a stationary contact, and a drive spring. The contact support is connected to the moving contact and drives the moving contact to move along a first axial direction. The stationary contact is fixed to the middle shell. The contact support includes a rotating component. A first connecting rod extending from one end of the drive spring is connected to the rotating component, and a second connecting rod extending from the other end of the drive spring is connected to the moving contact.

[0006] The second operating mechanism includes a contact rod support, a movable contact rod, and a stationary contact rod. The contact rod support is mounted on the middle shell, one end of the movable contact rod is fixed to the contact rod support, and the contact rod support drives the movable contact rod to move along a first axial direction. The stationary contact rod is fixed to the middle shell.

[0007] In this technical solution, the middle shell is used to install the first operating mechanism and the second operating mechanism, thereby facilitating the normal operation of the first and second operating mechanisms. The first operating mechanism drives the spring to rotate via the first connecting rod using the contact support member, causing the second connecting rod of the spring to rotate accordingly. This causes the moving contact to move along the first axis, thereby connecting the moving contact with the stationary contact and activating the first operating mechanism. This simplifies the activation method of the first operating mechanism, simplifies its mechanical structure, saves production materials, and reduces the installation space required for the first mechanism. The second operating mechanism drives the moving contact rod to move along the first axis using the contact rod support, causing the moving contact rod to connect with the stationary contact rod, thereby activating the second operating mechanism.

[0008] In some embodiments, the arc fault circuit interrupter further includes a linkage shaft, one end of which is connected to the contact rod support, the other end of which is connected to the contact support, and the linkage shaft is connected to the rotating component.

[0009] In this technical solution, the linkage shaft is used to connect the first operating mechanism and the second operating mechanism, so that the first operating mechanism and the second operating mechanism can operate simultaneously, thereby making the arc fault circuit interrupter effective.

[0010] In some embodiments, the middle shell is provided with an L-shaped first locking platform, and the linkage shaft is locked between the first locking platform and the middle shell.

[0011] In this technical solution, the first locking platform is used to limit the position of the linkage shaft and prevent the linkage shaft from detaching from the middle shell, which would affect the linkage function of the linkage shaft.

[0012] In some embodiments, the arc fault circuit interrupter further includes a rotary handle mounted on the middle housing, the rotary handle moving along a first axial direction, and the rotary handle connected to the contact rod support.

[0013] In this technical solution, the rotating handle is used to drive the second operating mechanism, thereby enabling the contact rod to operate.

[0014] In some embodiments, the arc fault circuit interrupter further includes a connecting rod, and the second operating mechanism further includes a trip latch, a locking latch, and a rocker arm. The rotating handle is connected to the contact rod support via the connecting rod. The rotating handle drives the trip latch and the rocker arm to move along a first axial direction via the connecting rod. The trip latch is fixed to the rocker arm, the locking latch is disposed on the contact rod support, and the rocker arm is fixed to the contact rod support. The trip latch drives the locking latch to move along the first axial direction.

[0015] In this technical solution, the connecting rod is used to connect the rotating handle to the jumper on the second operating mechanism, so that the force of the rotating handle is transmitted to the second operating mechanism. The rocker arm is used to connect the jumper and the contact rod support, so that the jumper rotates while driving the contact rod support to move.

[0016] In some embodiments, the arc fault circuit interrupter further includes an arc detection component, which includes a button, a connecting spring, and an arc column. The arc column and the button are disposed on the middle shell, and one end of the connecting spring is installed at the lower end of the button. When the button is pressed, the connecting spring is connected to the arc column.

[0017] In this technical solution, the arc detection component is used to generate an arc to test the arc fault circuit interrupter. The arc detection component generates an arc by pressing the button, causing the spring to contact the arc column, and after the test is completed, the button is restored to its initial position by utilizing the stress of the spring.

[0018] In some embodiments, the moving contact includes a first positioning shaft and a moving contact body. The first positioning shaft is fixed to the middle shell, the moving contact body is mounted on the first positioning shaft, the driving spring is sleeved on the first positioning shaft, and the end of the positioning spring away from the contact support is engaged with the moving contact body.

[0019] In this technical solution, the first positioning shaft is used to mount the moving contact and the drive spring, providing a fulcrum for the rotation of the moving contact and the drive spring.

[0020] In some embodiments, the moving contact body has a second contact protrusion at the end away from the contact support member, the second contact protrusion facing the stationary contact, and the stationary contact has an inclined contact surface.

[0021] In this technical solution, the second contact protrusion helps the moving contact body to contact the stationary contact, thereby enabling the moving contact and the stationary contact to conduct electricity. The inclined contact surface helps to make the contact between the moving contact and the stationary contact smoother.

[0022] In some embodiments, a limiting protrusion is provided on the side of the movable contact near the rotating member, and a limiting groove is provided on the side of the rotating member near the movable contact, with the limiting protrusion disposed within the limiting groove.

[0023] In this technical solution, during the reset process of the first operating mechanism of the arc fault circuit interrupter, the rotating component pushes the limiting protrusion through the limiting groove, thereby pushing the moving contact and disconnecting the moving contact from the stationary contact.

[0024] In some embodiments, the arc fault circuit interrupter further includes a partition that covers the first operating mechanism; the middle shell is also provided with an L-shaped second locking platform, and the partition is locked to the second locking platform.

[0025] In this technical solution, the partition is used to protect the first operating mechanism and prevent it from being affected by external factors. At the same time, it isolates the remaining space at the end of the first operating mechanism in the middle shell from the first operating mechanism, thereby improving the utilization rate of the remaining space. The partition can also isolate the electric arc and prevent the electric arc from escaping from the first operating mechanism. The second mounting plate is used for installation and fixation.

[0026] The beneficial effects of this utility model are as follows: the first operating mechanism drives the spring to rotate by utilizing the contact support component, thereby driving the moving contact to move, which simplifies the conduction method of the first operating mechanism, simplifies the mechanical structure of the first operating mechanism, saves production materials for the first mechanism, and reduces the installation space required for the first mechanism; by using the rotating component to push the limiting protrusion through the limiting groove, the moving contact is pushed, causing the moving contact to disconnect from the stationary contact, achieving the effect of resetting the first operating mechanism; by using the partition to isolate the remaining space at the first operating mechanism end of the middle shell from the first operating mechanism, the utilization rate of the remaining space is improved, and the partition can also isolate the electric arc, preventing the electric arc from escaping from the first operating mechanism; by using the electric arc detection component to generate an electric arc to test the electric arc fault circuit breaker, the self-testing capability of the electric arc fault circuit breaker is increased. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of an arc fault circuit interrupter according to an embodiment of the present invention. Figure 1 ;

[0028] Figure 2 This is a schematic diagram of an arc fault circuit interrupter according to an embodiment of the present invention. Figure 2 ;

[0029] Figure 3 This is a schematic diagram showing the connection between the first operating mechanism and the second operating mechanism of an arc fault circuit interrupter according to an embodiment of the present invention.

[0030] Figure 4This is a schematic diagram of the first operating mechanism of an arc fault circuit interrupter according to an embodiment of the present invention;

[0031] Figure 5 This is a schematic diagram of the second operating mechanism of an arc fault circuit interrupter according to an embodiment of the present invention;

[0032] Figure 6 This is a schematic diagram of an arc fault circuit interrupter according to an embodiment of the present invention. Figure 3 ;

[0033] In the diagram: 1. Middle shell; 11. First locking platform; 12. Second locking platform; 2. First operating mechanism; 21. Contact support; 211. Rotating component; 2111. Limiting groove; 212. Drive spring; 2121. First connecting rod connection; 2122. Second connecting rod connection; 22. Moving contact; 221. First positioning shaft; 222. Moving contact body; 223. Second contact protrusion; 224. Limiting protrusion; 23. Stationary contact; 3. Second operating mechanism; 31. Contact rod support; 32. Moving contact rod; 321. First contact protrusion; 33. Stationary contact rod; 34. Lock; 35. Jumper; 36. Rocker arm; 4. Linkage shaft; 5. Rotating handle; 6. Connecting rod; 7. Partition; 81. Button; 82. Connecting spring; 83. Arc column; θ. First axial direction. Detailed Implementation

[0034] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more definite definition of the scope of protection of the present invention.

[0035] Combined with appendix Figure 1 To be continued Figure 5 As shown, this utility model provides an arc fault circuit interrupter, including a middle shell 1, a first operating mechanism 2, and a second operating mechanism 3. The first operating mechanism 2 and the second operating mechanism 3 are respectively disposed on both sides of the middle shell 1, wherein:

[0036] The first operating mechanism 2 is an N-pole mechanism. The first operating mechanism 2 includes a contact support 21, a moving contact 22, a stationary contact 23, and a drive spring 212. The contact support 21 is connected to the moving contact 22. The contact support drives the moving contact 22 to move along the first axis θ. The stationary contact 23 is fixed on the middle shell 1. The contact support 21 includes a rotating member 211. A first connecting rod extending from one end of the drive spring 212 is connected to the rotating member 211. A second connecting rod extending from the other end of the drive spring 212 is connected to the moving contact 22.

[0037] The second operating mechanism 3 is an L-pole. The second operating mechanism 3 includes a contact rod support 31, a moving contact rod 32, and a stationary contact rod 33. The contact rod support 31 is mounted on the middle shell 1. One end of the moving contact rod 32 is fixed to the contact rod support 31. The contact rod support 31 drives the moving contact rod 32 to move along the first axial direction θ. The stationary contact rod 33 is fixed to the middle shell 1.

[0038] The middle shell 1 is used to install the first operating mechanism 2 and the second operating mechanism 3, thereby facilitating the normal operation of the first operating mechanism 2 and the second operating mechanism 3. The first operating mechanism 2 drives the spring 212 to rotate through the first connecting rod using the contact support 21, causing the second connecting rod of the spring to rotate accordingly, thereby moving the moving contact 22 along the first axis θ, so that the moving contact 22 connects to the stationary contact 23, making the first operating mechanism 2 conductive. This simplifies the conduction method of the first operating mechanism 2, simplifies the mechanical structure of the first operating mechanism 2, saves the production materials of the first mechanism, and reduces the installation space required by the first mechanism. The second operating mechanism 3 drives the moving contact rod 32 to move along the first axis θ using the contact rod support 31, so that the moving contact rod 32 connects to the stationary contact rod 33, thereby making the second operating mechanism 3 conductive.

[0039] Continue to combine with the appendix Figure 1 To be continued Figure 5 As shown, in some embodiments, the arc fault circuit breaker further includes a linkage shaft 4, one end of which is connected to the contact rod support 31, and the other end of which is connected to the contact support. The linkage shaft 4 is connected to the rotating component 211. The linkage shaft 4 is used to connect the first operating mechanism 2 and the second operating mechanism 3, so that the first operating mechanism 2 and the second operating mechanism 3 can operate simultaneously, thereby making the arc fault circuit breaker effective.

[0040] Continue to combine with the appendix Figure 1 As shown, in some embodiments, the middle shell 1 is provided with an L-shaped first retaining platform 11, and the linkage shaft 4 is engaged between the first retaining platform 11 and the middle shell 1. The first retaining platform 11 is used to limit the position of the linkage shaft 4 and prevent the linkage shaft 4 from detaching from the middle shell 1, which would affect the linkage function of the linkage shaft 4.

[0041] Continue to combine with the appendix Figure 1 Appendix Figure 2 and attached Figure 5 As shown, the arc fault circuit breaker also includes a rotary handle 5, which is mounted on the middle shell 1. The rotary handle 5 moves along the first axis θ and is connected to the contact rod support 31. The rotary handle 5 is used to drive the second operating mechanism 3, thereby causing the contact rod support 31 to operate.

[0042] Continue to combine with the appendix Figure 2As shown, the arc fault circuit interrupter also includes a connecting rod 6, and the second operating mechanism 3 includes a jump catch 35, a latch 34, and a rocker arm 36. The rotating handle 5 is connected to the contact rod support 31 through the connecting rod 6. The rotating handle 5 drives the jump catch 35 and the rocker arm 36 to move along the first axis θ through the connecting rod 6. The jump catch 35 is fixed on the rocker arm 36, and the latch 34 is disposed on the contact rod support 31. The rocker arm 36 is fixed on the contact rod support 31. The jump catch 35 drives the latch 34 to move along the first axis θ. The connecting rod 6 is used to connect the rotating handle 5 and the jump catch 35 on the second operating mechanism 3, so that the force of the rotating handle 5 is transmitted to the second operating mechanism 3. The rocker arm 36 is used to connect the jump catch 35 and the contact rod support 31, so that the jump catch 35 rotates while driving the contact rod support 31 to move.

[0043] Continue to combine with the appendix Figure 5 As shown, in some embodiments, the arc fault circuit breaker further includes an arc detection component, which includes a button 81, a connecting spring 82, and an arc column 83. The arc column 83 and the button 81 are disposed on the middle shell 1. One end of the connecting spring 82 is installed at the lower end of the button 81. When the button 81 is pressed, the connecting spring 82 is connected to the arc column 83. The arc detection component is used to generate an arc to test the arc fault circuit breaker. The arc detection component generates an arc by pressing the button 81, causing the spring to contact the arc column 83. After the test is completed, the button 81 is restored to its initial position by utilizing the stress of the spring.

[0044] Continue to combine with the appendix Figure 5 As shown, in some embodiments, the movable contact rod 32 is provided with a first contact protrusion 321 on the side away from the contact rod support 31. The first contact protrusion 321 faces the stationary contact rod 33. The first contact protrusion 321 facilitates contact between the movable contact rod 32 and the stationary contact rod 33, thereby conducting the connection between the movable contact rod 32 and the stationary contact rod 33.

[0045] Continue to combine with the appendix Figure 1 Appendix Figure 3 and attached Figure 4 As shown, in some embodiments, the movable contact 22 includes a first positioning shaft 221 and a movable contact body 222. The first positioning shaft 221 is fixed to the middle shell 1, the movable contact body 222 is mounted on the first positioning shaft 221, and the drive spring 212 is sleeved on the first positioning shaft 221. One end of the positioning spring away from the contact support member 21 is engaged with the movable contact body 222. The first positioning shaft 221 is used to mount the movable contact body 222 and the drive spring 212, and provides a fulcrum for the rotation of the movable contact body 222 and the drive spring 212.

[0046] Continue to combine with the appendix Figure 4 As shown, in some embodiments, the moving contact 222 is provided with a second contact protrusion 223 at the end away from the contact support 21. The second contact protrusion 223 faces the stationary contact 23, and the stationary contact 23 is provided with an inclined contact surface. The second contact protrusion 223 helps the moving contact 222 to contact the stationary contact 23, thereby making the moving contact 22 and the stationary contact 23 conductive. The inclined contact surface helps to make the contact between the moving contact 22 and the stationary contact 23 smoother.

[0047] Continue to combine with the appendix Figure 4 As shown, in some embodiments, the moving contact 222 is provided with a limiting protrusion 224 on the side near the rotating member 211, and the rotating member 211 is provided with a limiting groove 2111 on the side near the moving contact 22. The limiting protrusion 224 is disposed in the limiting groove 2111. During the reset process of the first operating mechanism 2 of the arc fault circuit interrupter, the rotating member 211 pushes the limiting protrusion 224 through the limiting groove 2111, thereby pushing the moving contact 22 and disconnecting the moving contact 22 from the stationary contact 23.

[0048] Continue to combine with the appendix Figure 6 As shown, in some embodiments, the arc fault circuit interrupter further includes a partition 7, which covers the first operating mechanism 2; the middle shell 1 is also provided with an L-shaped second snap-fit ​​platform 12, and the partition 7 is snap-fitted to the second snap-fit ​​platform 12. The partition 7 is used to protect the first operating mechanism 2 and prevent the first operating mechanism 2 from being affected by external factors. At the same time, it isolates the remaining space at the end of the middle shell 1 from the first operating mechanism 2, thereby improving the utilization rate of the remaining space. The partition 7 can also isolate the arc and prevent the arc from escaping from the first operating mechanism 2. The second snap-fit ​​platform 12 is used for installation and fixation.

[0049] In summary, this utility model provides an arc fault circuit breaker. The first operating mechanism drives the spring to rotate via a contact support member, thereby driving the moving contact to move. This simplifies the conduction method and mechanical structure of the first operating mechanism, saves production materials, and reduces the installation space required. By using a rotating member to push a limiting protrusion through a limiting groove, the moving contact is pushed, disconnecting it from the stationary contact and achieving the reset effect of the first operating mechanism. By using a partition to separate the remaining space at the first operating mechanism end of the middle shell from the first operating mechanism, the utilization rate of the remaining space is improved. At the same time, the partition can also isolate the arc, preventing the arc from escaping from the first operating mechanism. By using an arc detection component to generate an arc to test the arc fault circuit breaker, the self-testing capability of the arc fault circuit breaker is increased.

[0050] The above embodiments are only for illustrating the technical concept and features of this utility model. Their purpose is to enable those skilled in the art to understand the content of this utility model and implement it. They cannot be used to limit the protection scope of this utility model. All equivalent changes or modifications made in accordance with the spirit and essence of this utility model should be covered within the protection scope of this utility model.

Claims

1. An arc fault circuit interrupting device, comprising: The utility model relates to a switch, including middle shell, first operating mechanism and second operating mechanism, first operating mechanism and second operating mechanism set up respectively in both sides of middle shell, wherein: First operating mechanism, first operating mechanism includes contact support, moving contact, static contact and drive spring, contact support connects moving contact, contact support drives moving contact along first axial movement, static contact is fixed on middle shell, contact support includes rotating part, drive spring one end stretches out first connecting rod and connects rotating part, drive spring other end stretches out second connecting rod and connects moving contact; Second operating mechanism, second operating mechanism includes touch rod support, moving touch rod and static touch rod, touch rod support is installed on middle shell, moving touch rod one end is fixed on touch rod support, touch rod support drives moving touch rod along first axial movement, static touch rod is fixed on middle shell.

2. The arc fault circuit interrupting device of claim 1, wherein, Still include linkage shaft, linkage shaft one end connects touch rod support, linkage shaft other end connects contact support, linkage shaft connects rotating part.

3. The arc fault circuit interrupting device of claim 2, wherein, Middle shell is provided with L type first clamping station, linkage shaft is clamped between first clamping station and middle shell.

4. The arc fault circuit interrupting device of claim 2, wherein, Still include rotating handle, rotating handle is installed on middle shell, rotating handle along first axial movement, rotating handle connects touch rod support.

5. The arc fault circuit interrupting device of claim 4, wherein, Still include connecting rod, second operating mechanism still includes jump buckle, lock buckle and rocker arm, rotating handle passes through connecting rod and connects touch rod support, rotating handle passes through connecting rod and drives jump buckle and rocker arm along first axial movement, jump buckle is fixed on rocker arm, lock buckle is arranged on touch rod support, rocker arm is fixed on touch rod support, jump buckle drives lock buckle along first axial movement.

6. The arc fault circuit interrupting device of Claim 1, wherein, Still include electric arc detection assembly, electric arc detection assembly includes button, connecting spring and electric arc column, electric arc column and button are arranged on middle shell, connecting spring one end is installed on the lower end of button, when button is pressed, connecting spring and electric arc column are conducted.

7. The arc fault circuit interrupting device of Claim 1, wherein, Moving contact includes first positioning shaft and moving contact body, first positioning shaft is fixed on middle shell, moving contact body is installed on first positioning shaft, drive spring is sleeved on first positioning shaft, positioning spring one end away from contact support is clamped with moving contact body.

8. The arc fault circuit interrupting device of claim 7, wherein, Moving contact body one end away from contact support is provided with second contact protrusion, second contact protrusion is towards static contact, static contact is provided with inclined contact surface.

9. The arc fault circuit interrupting device of claim 8, wherein, Moving contact body one side close to rotating part is provided with limiting protrusion, rotating part one side close to moving contact is provided with limiting groove, limiting protrusion is arranged in limiting groove.

10. The arc fault circuit interrupting device of Claim 1, wherein, Still include partition, partition covers first operating mechanism, middle shell is provided with L type second clamping station, partition and second clamping station clamping arrangement.

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