A leakage protection device with a leakage protection mechanism based on a leakage accessory and a RCCB type leakage release mechanism

Abstract

The application discloses a RCCB type electric leakage tripping mechanism based on an electric leakage accessory and an electric leakage protector, wherein the RCCB type electric leakage tripping mechanism based on the electric leakage accessory comprises a mounting plate, the upper end of the mounting plate is formed with a first indicating surface, the two sides of the mounting plate are respectively provided with an executing mechanism and an indicating piece, the indicating piece is rotationally connected to the mounting plate and is connected to the mounting plate through an indicating spring, the indicating piece is respectively provided with a first linkage part and an indicating part, the end of the first linkage part penetrates through the mounting plate and extends to one side of the executing mechanism, the top of the indicating part extends to the outside of the first indicating surface and is provided with a second indicating surface, and one end of the executing mechanism is provided with a trigger part matched with the first linkage part. The application can guarantee the indicating accuracy of the electric leakage protector and improve the linkage stability of the electric leakage protector when the electric leakage protector is combined with other circuit breakers.

Description

Technical Field

[0001] This invention relates to an RCCB type residual current device, and more particularly to an RCCB type residual current tripping mechanism and residual current device based on a residual current accessory. Background Technology

[0002] Currently, residual current devices (RCCs) are divided into RCCB type and RCBO type. Due to the differences in the materials, sizes and distribution of the components in the two types of RCCs, the structure and tripping methods of their actuators are also different. That is, manufacturers need to design the actuators separately for the characteristics of RCCB type RCCs.

[0003] The drawback of existing RCCB-type residual current devices (RCCBs) lies in the fact that, on the one hand, the indicator is generally integrated into the handle. This means that the indicator is activated by the handle's opening and closing action, and the operator then judges whether the RCB has tripped based on the indicator's status. However, this method is prone to errors if the moving contact inside the RCB has already opened, but the handle is stuck or remains in the closed position. This leads to misjudgment by the operator and reduces the accuracy of determining the RCB's operating status.

[0004] On the other hand, since RCCB-type residual current circuit breakers (RCCBs) can only perform residual current protection, some manufacturers combine them with circuit breakers that have overvoltage protection to improve their functionality. This involves connecting the handles of the two circuit breakers via a lever, so that when either circuit breaker opens, the other circuit breaker operates synchronously, providing both residual current and overvoltage protection. However, this design has a drawback: if the handle of either circuit breaker becomes stuck, causing inconsistencies between the handle and the inner actuator, that circuit breaker cannot synchronize with the other, resulting in a failure of the linkage effect.

[0005] Therefore, existing RCCB type residual current devices have problems with poor indication accuracy and linkage stability. Summary of the Invention

[0006] The purpose of this invention is to provide an RCCB-type residual current tripping mechanism and a residual current device (RCD) based on a residual current accessory. This mechanism ensures the accuracy of the RCD's indication and improves the stability of its linkage when used in combination with other circuit breakers.

[0007] The technical solution of the present invention: an RCCB type leakage tripping mechanism based on leakage current accessories, including a mounting plate, the upper end of the mounting plate forming a first indicating surface, and an actuator and an indicating element respectively provided on both sides of the mounting plate. The indicating element is rotatably connected to the mounting plate and connected to the mounting plate via an indicating spring. The indicating element is respectively provided with a first linkage part and an indicating part. The end of the first linkage part passes through the mounting plate and extends to one side of the actuator. The top of the indicating part extends to the outside of the first indicating surface and is provided with a second indicating surface. One end of the actuator is provided with a trigger part that cooperates with the first linkage part.

[0008] When the residual current device (RCD) is in the closed state, the triggering part presses the first linkage part to make the indicator element in the closed position, and the second indicator surface is located outside the first indicator surface to realize the closed indication function of the RCD.

[0009] When the residual current device (RCD) is in the open state, the trigger part rotates to separate from the first linkage part, and the indicator spring drives the indicator part to rotate to the open position, so that the second indicator surface rotates and is misaligned with the first indicator surface, and the first indicator surface realizes the open indication function of the RCD.

[0010] In the aforementioned RCCB type leakage tripping mechanism based on leakage accessories, the actuator includes a rotating component, a reaction spring connected to the rotating component, a lower connecting rod rotatably connected to one side of the rotating component, a handle connected to the outside of the lower connecting rod via a U-shaped connecting rod, a middle connecting rod fastened to the end of the lower connecting rod, a trigger part formed at one end of the middle connecting rod, a mounting plate rotatably connected to the other end of the middle connecting rod, a first limiting surface for rotating and limiting the lower connecting rod in the middle of the middle connecting rod, an angle formed between the middle connecting rod and the U-shaped connecting rod with the angle direction facing the first limiting surface, a trip buckle provided on one side of the middle connecting rod, the trip buckle rotatably connected to the mounting plate and connected to the mounting plate via a trip buckle spring, a first driving part cooperating with the middle connecting rod in the middle of the trip buckle, and a tripping device connected to the outside of the trip buckle via a limiting component;

[0011] The middle connecting rod is used to limit the lower connecting rod and the indicator through the first limiting surface when the circuit is closed, so that the lower connecting rod cannot be pushed outward by the elastic force of the reaction spring.

[0012] The jump spring is used to apply a compressive force to the first drive unit in the direction of the middle connecting rod;

[0013] The limiting component is used to limit the trip lever when the circuit is closed, so that the first drive part and the middle connecting rod are separated from each other, and the limiting of the trip lever is released after the trip unit is pushed out.

[0014] The jump buckle is used to press the middle link through the first drive part after the limit is released by the elastic force of the jump buckle spring, so that the middle link releases the limit on the lower link.

[0015] In the aforementioned RCCB type leakage tripping mechanism based on leakage accessories, the middle connecting rod and the mounting plate are connected to each other by a middle connecting rod spring, which is used to apply a compressive force to the middle connecting rod toward the lower connecting rod.

[0016] In the aforementioned RCCB type leakage tripping mechanism based on leakage accessories, a fastening groove is formed in the middle of the middle connecting rod, and a first limiting surface and a second limiting surface are formed on both sides of the fastening groove, respectively. An included angle is formed between the first limiting surface and the second limiting surface, and the second limiting surface is used to fit against the lower connecting rod under the squeezing force of the middle connecting rod spring.

[0017] In the aforementioned RCCB type leakage tripping mechanism based on leakage current accessories, the limiting component includes a reset plate and a latch, both of which are rotatably connected to a mounting plate. One side of the reset plate is provided with a tripping surface that engages with the tripping device, and the other side of the reset plate is provided with a second driving part that engages with the latch. The latch and the mounting plate are connected to each other by a latch spring, and one side of the latch is provided with a third limiting surface for limiting the tripping.

[0018] The reset plate is used to press the latch after the trip unit is ejected;

[0019] The latch is used to separate the third limiting surface from the jumper after being squeezed by the latch, thereby releasing the limiting of the jumper.

[0020] The locking spring is used to drive the locking plate to reset after it disengages from the locking plate.

[0021] In the aforementioned RCCB type leakage tripping mechanism based on leakage accessories, one side of the rotating part is provided with a pressure plate that cooperates with the tripping buckle. The pressure plate is used to drive the tripping buckle to reset by squeezing after the circuit is opened.

[0022] In the aforementioned RCCB type leakage tripping mechanism based on leakage accessories, a reset part is provided on one side of the reset plate, and the outer side of the reset part is connected to the mounting plate via a reset spring. A third driving part that cooperates with the reset spring is provided on the handle.

[0023] The third drive unit is used to squeeze and limit the reset spring when the circuit is closed, so that the reset spring and the reset plate are separated from each other, and to release the squeezing and limiting of the reset spring after the circuit is opened.

[0024] The reset spring is used to reset the reset plate by rebounding after the limit is released, and the reset plate causes the trip unit to retract and reset after being reset.

[0025] In the aforementioned RCCB type leakage tripping mechanism based on leakage accessories, a linkage pressure block is provided on one side of the rotating component, and the indicator is provided with a second linkage part for connecting the external linkage and a pressure receiving part that cooperates with the linkage pressure block; the linkage pressure block is used to apply pressure to the pressure receiving part as the rotating component opens, so that the indicator rotates under pressure to the open position; the second linkage part is used to keep the opening and closing states of the indicator and the external linkage synchronized.

[0026] A residual current device (RCCB) based on a residual current accessory is also provided.

[0027] The residual current device includes a mounting housing, a mounting plate detachably connected inside the mounting housing, a rotating component rotatably connected inside the mounting housing and connected to the mounting housing via a reaction spring, a moving contact connected to the rotating component, a stationary contact fixedly connected to the mounting housing on one side of the moving contact, and an observation port on the top of the mounting housing that mates with a first indicating surface and a second indicating surface.

[0028] Compared with the prior art, the present invention has the following characteristics:

[0029] (1) The present invention, through the mechanism of the actuator, the mounting plate and the indicator, enables the indicator to block the first indicator surface of the mounting plate by the second indicator surface when the leakage current protection device is closed, so that only the second indicator surface is displayed at the observation port, thereby realizing the closing indication function; when the actuator performs the opening action, the actuator releases the limit on the indicator and causes the indicator to rotate under the action of the indicator spring to be misaligned with the first indicator surface, thereby exposing the second indicator surface to the inside of the observation port, thereby realizing the opening indication function; under the above coordination, the indicator of the present invention can form a linkage with the actuator structure, that is, effectively avoid the problem of inaccurate indication caused by handle jamming, and improve the indication stability of the present invention;

[0030] (2) Based on the above, the present invention further specifies the structure of the actuator, on the one hand ensuring the linkage effect between the indicator and the actuator; on the other hand, the opening action of the indicator can be directly associated with the rotating part, thereby effectively preventing the indicator from malfunctioning due to jamming of the intermediate mechanism, and further improving the indication stability of the present invention.

[0031] (3) Through the structural cooperation of the second linkage part and the trigger part, when the present invention is used in combination with other circuit breakers, the connecting rod of the external circuit breaker can be directly fastened to the second linkage part, so that when the indicator performs the opening action, it can drive the actuator of the external circuit breaker to perform the corresponding action, or the connecting rod of the external circuit breaker can drive the first linkage part to push the middle connecting rod after the opening action, so that the middle connecting rod can release the lower connecting rod and realize the subsequent tripping action; that is, the linkage between the actuator of the present invention and the external circuit breaker is realized in the opening and closing process, avoiding the failure of its linkage action due to the handle jamming, and improving the linkage stability of the leakage current protector when used in combination with other circuit breakers;

[0032] Therefore, the present invention can ensure the accuracy of the indication of the residual current device (RCD) and improve the linkage stability of the RCD when used in combination with other circuit breakers. Attached Figure Description

[0033] Figure 1 This is a schematic diagram of the structure of the present invention in the open state;

[0034] Figure 2 This is a schematic diagram of the structure of the present invention in the closed state;

[0035] Figure 3 yes Figure 2 Connection structure diagram of the middle link and the lower link;

[0036] Figure 4 This is an exploded view of the RCCB type leakage current tripping mechanism;

[0037] Figure 5 It is the outline drawing of the indicator;

[0038] Figure 6 This is a schematic diagram of the structure of the present invention when the trip unit is ejected;

[0039] Figure 7 This is a schematic diagram of the power extraction mechanism in Embodiment 2;

[0040] Figure 8 yes Figure 7 Exploded view.

[0041] The markings in the attached diagram are as follows: 1-Rotating component, 2-Reaction spring, 3-Lower connecting rod, 4-U-shaped connecting rod, 5-Handle, 6-Middle connecting rod, 7-Clutch, 8-Clutch spring, 9-Trigger, 10-Middle connecting rod spring, 11-Reset plate, 12-Lock, 13-Lock spring, 14-Reset spring, 15-Mounting plate, 16-Indicator, 17-Trigger part, 100-Moving contact, 200-Stationary contact, 300-Shaft, 400-Contact spring, 500-Button power-on spring, 600-Button spring 700 - Resistor, 800 - Test button, 101 - Pressure plate, 102 - Linkage pressure block, 501 - Third drive unit, 601 - First limiting surface, 602 - Fastening groove, 603 - Second limiting surface, 701 - First drive unit, 111 - Tripping surface, 112 - Second drive unit, 113 - Reset unit, 121 - Third limiting surface, 151 - First indicating surface, 161 - First linkage unit, 162 - Indicator unit, 163 - Second indicating surface, 164 - Second linkage unit, 165 - Pressing part. Detailed Implementation

[0042] The present invention will be further described below with reference to the accompanying drawings and embodiments, but this should not be construed as limiting the present invention.

[0043] Example 1. An RCCB-type leakage tripping mechanism based on a leakage current accessory, configured as follows: Figure 1-6 As shown, the device includes a mounting plate 15, with a first indicating surface 151 formed at the upper end of the mounting plate 15. An actuator and an indicating element 16 are respectively provided on both sides of the mounting plate 15. The indicating element 16 is rotatably connected to the mounting plate 15 and connected to the mounting plate 15 via an indicating spring. The indicating element 16 is provided with a first linkage part 161 and an indicating part 162. The end of the first linkage part 161 passes through the mounting plate 15 and extends to one side of the actuator. The top of the indicating part 162 extends to the outside of the first indicating surface 151 and is provided with a second indicating surface 163. One end of the actuator is provided with a trigger part 17 that cooperates with the first linkage part 161.

[0044] When the residual current device is in the closed state, the triggering part 17 presses the first linkage part 161 to make the indicator 16 be in the closed position, and the second indicator surface 163 is located outside the first indicator surface 151 to realize the closed indication function of the residual current device.

[0045] When the residual current device (RCD) is in the open state, the trigger part 17 rotates to separate from the first linkage part 161, and the indicator part 162 is driven by the indicator spring to rotate to the open position, so that the second indicator surface 163 is misaligned with the first indicator surface 151 as it rotates, and the first indicator surface 151 realizes the open indication function of the RCD.

[0046] The actuator includes a rotating component 1 for connecting a moving contact. A reaction spring 2 is connected to the rotating component 1, and the spring force of the reaction spring 2 is greater than that of the indicating spring. A lower connecting rod 3 is rotatably connected to one side of the rotating component 1. A handle 5 is connected to the outside of the lower connecting rod 3 via a U-shaped connecting rod 4. The lower connecting rod 3 and the U-shaped connecting rod 4 are interlocked and rotatably connected. A middle connecting rod 6 is fastened to the end of the lower connecting rod 3. One end of the middle connecting rod 6 forms a trigger part 17, and the other end of the middle connecting rod 6 is rotatably connected to a mounting plate 15. The middle part is provided with a first limiting surface 601 for rotating and limiting the lower connecting rod 3. The middle connecting rod 6 and the U-shaped connecting rod 4 form an angle of less than 180° and the angle direction is towards the first limiting surface 601. A jump buckle 7 is provided on one side of the middle connecting rod 6. The jump buckle 7 is rotatably connected to the mounting plate 15 and connected to the mounting plate 15 via a jump buckle spring 8. The elastic force of the jump buckle spring 8 is less than the elastic force of the reaction spring 2. The middle part of the jump buckle 7 is provided with a first driving part 701 that cooperates with the middle connecting rod 6. The outside of the jump buckle 7 is connected to a release device 9 via a limiting component.

[0047] The middle connecting rod 6 is used to limit the lower connecting rod 3 and the indicator 16 through the first limiting surface 601 when the circuit is closed, so that the lower connecting rod 3 cannot be pushed outward by the elastic force of the reaction spring 2.

[0048] The jump spring 8 is used to apply a compressive force to the first drive unit 701 in the direction of the middle connecting rod 6;

[0049] The limiting component is used to limit the trip lever 7 when the circuit is closed, so that the first drive unit 701 and the middle connecting rod 6 are separated from each other, and the limiting of the trip lever 7 is released after the trip unit 9 is pushed out.

[0050] The jump buckle 7 is used to press the middle connecting rod 6 through the first drive part 701 after the limit is released by the elastic force of the jump buckle spring 8, so that the middle connecting rod 6 releases the limit on the lower connecting rod 3.

[0051] The middle connecting rod 6 and the mounting plate 15 are connected to each other by the middle connecting rod spring 10. The middle connecting rod spring 10 is used to apply a pressing force to the middle connecting rod 6 toward the lower connecting rod 3, so that the middle connecting rod 6 remains engaged with the lower connecting rod 3 when it does not contact the jump buckle 7.

[0052] The middle connecting rod 6 has a fastening groove 602 in the middle, and a first limiting surface 601 and a second limiting surface 603 are formed on both sides of the fastening groove 602. An angle is formed between the first limiting surface 601 and the second limiting surface 603. The second limiting surface 603 is used to fit against the lower connecting rod 3 under the squeezing force of the middle connecting rod spring 10.

[0053] The limiting assembly includes a reset plate 11 and a latch 12, both of which are rotatably connected to the mounting plate 15. One side of the reset plate 11 is provided with a release surface 111 that engages with the release device 9, and the other side of the reset plate 11 is provided with a second driving part 112 that engages with the latch 12. The latch 12 and the mounting plate 15 are connected to each other by a latch spring 13. One side of the latch 12 is provided with a third limiting surface 121 for limiting the jumper 7, and the latch 12 on one side of the third limiting surface 121 is provided with an opening through which the jumper 7 can rotate.

[0054] The reset plate 11 is used to press the latch 12 after the trip unit 9 is ejected;

[0055] The latch 12 is used to separate the third limiting surface 121 from the jump buckle 7 after being squeezed by the latch 12, thereby releasing the limiting of the jump buckle 7;

[0056] The locking spring 13 is used to drive the locking 12 to reset after the reset plate 11 is disengaged from the locking 12.

[0057] One side of the rotating component 1 is provided with a pressure plate 101 that cooperates with the jump buckle 7. The pressure plate 101 is used to reset the jump buckle 7 by squeezing after the gate is opened.

[0058] The reset plate 11 has a reset part 113 on one side, and the outside of the reset part 113 is connected to the mounting plate 15 via a reset spring 14. The handle 5 is provided with a third drive part 501 that cooperates with the reset spring 14.

[0059] The third drive unit 501 is used to squeeze and limit the reset spring 14 when the circuit is closed, so that the reset spring 14 is separated from the reset plate 11, and to release the squeezing and limiting of the reset spring 14 after the circuit is opened.

[0060] The reset spring 14 is used to reset the reset plate 11 by rebounding after the limit is released, and to cause the reset plate 11 to retract and reset the trip unit 9 after the reset.

[0061] One side of the rotating component 1 is provided with a linkage pressure block 102. The indicator 16 is provided with a second linkage part 164 for fastening and connecting the external connecting rod and a pressure receiving part 165 that cooperates with the linkage pressure block 102. The second linkage part 164 is V-shaped. The linkage pressure block 102 is used to apply pressure to the pressure receiving part 165 as the rotating component 1 opens, so that the indicator 16 is rotated to the open position under pressure. The second linkage part 164 is used to keep the opening and closing states of the indicator 16 and the external connecting rod synchronized.

[0062] The external linkage is installed on the actuator of the external circuit breaker. When this embodiment is used in combination with the external circuit breaker, the external linkage extends into the V-shaped angle of the second linkage part 164, thereby realizing the mutual linkage of the two actuators.

[0063] The working principle of this invention is as follows: When the leakage current tripping mechanism is in the closed state, the handle 5 presses the reset spring 14 through the third drive part 501, causing the reset spring 14 and the reset part 113 to be separated from each other. This allows the reset plate 11 to be in a free-floating state and to be pressed against the trip unit 9 by the latch 12 and the latch spring 13. At the same time, the trip latch 7 is limited by the third limiting surface 121, causing the first drive part 701 and the middle connecting rod 6 to separate from each other, and the trip latch spring 8 is in a contracted state. At this time, the reaction spring 2 is in a compressed state and applies an upwardly inclined pressing force to the lower connecting rod 3. Meanwhile, the U-shaped connecting rod 4 is limited by the handle 5 and forms an angle with the lower connecting rod 3. As a result, the connection point between the lower connecting rod 3 and the U-shaped connecting rod 4 moves towards the first limiting surface 601 under the action of the reaction spring 2 and is held in the closed state by the latching limit of the middle connecting rod 6. When the indicator 16 is in the closed state, it is limited by the central connecting rod 6 and is in the closed position. In this state, the pressure part 165 and the linkage block 132 are separated from each other, the first linkage part 161 and the trigger part 17 are separated from each other, and the second indicator surface 163 covers the first indicator surface 151, so that external personnel can only see the second indicator surface 163 from the observation port of the leakage current protector, thus realizing the closed indication function.

[0064] by Figure 2 Taking the installation position of each component as an example, when the trip unit 9 is pushed out, the reset plate 11 is subjected to a squeezing force and rotates counterclockwise. This, in turn, drives the latch 12 to overcome the elastic force of the latch spring 13 and rotate clockwise via the second drive unit 112. After the latch 12 rotates clockwise, the third limiting surface 121 separates from the jump latch 7, thus releasing the restriction on the jump latch 7. This causes the jump latch 7 to rotate clockwise under the action of the jump latch spring 8, and the first drive unit 701 applies an upward squeezing force to the middle connecting rod 6, causing the middle connecting rod 6 to separate from the lower connecting rod 3 under this squeezing force, thus releasing the restriction on the rotating component 1. After the rotating component 1 is released from its restriction, it will rotate counterclockwise under the action of the return spring 2, thus separating the moving contact 100 and the stationary contact 200. Simultaneously, the pressure plate 101, along with the rotation of the rotating component 1, squeezes the jump latch 7, causing the jump latch 7 to move counterclockwise and return to its original position by passing back through the latch 12. During the opening process, the rotating part 1 will also be squeezed by the linkage pressure block 102 to the pressure part 165, causing the indicator 16 to rotate counterclockwise. The second indicator surface 163 will rotate to the first indicator surface 151 and be misaligned. The first indicator surface 151 will be exposed in the observation port of the leakage current protector, thus realizing the opening indication function.

[0065] When the handle 5 changes from the closed state to the open state, the third drive unit 501 releases the compression limit on the reset spring 14, so that after the reset spring 14 rebounds, it drives the reset plate 11 to rotate clockwise via the reset unit 113, thereby realizing the reset and retraction of the trip unit 9 and releasing the compression limit on the latch 12, so that the latch 12 returns to the limit position.

[0066] Similarly, when the handle 5 is closed, the U-shaped connecting rod 4 applies a downward squeezing force to the lower connecting rod 3 as the handle 5 rotates, causing both to return to the closed position. During the movement of the lower connecting rod 3, the middle connecting rod 6 remains in contact with the lower connecting rod 3 under the action of the middle connecting rod spring 10, and when the lower connecting rod 3 moves to the closed position, it is re-engaged and limited by the first limiting surface 601 to achieve the closing effect.

[0067] When this embodiment 1 is used in combination with an external circuit breaker, the actuator of the external circuit breaker can extend into the second linkage part 164 of the indicator 16 via a connecting rod. When the actuator of the external circuit breaker performs an opening action, the connecting rod presses against the second linkage part 164, causing the indicator 16 to rotate clockwise. The indicator 16 then pushes against the trigger part 17 via the first linkage part 161, causing the middle connecting rod 6 and the lower connecting rod 3 to disengage, thus realizing the opening action of the leakage current tripping mechanism. Similarly, when the indicator 16 performs an opening action with the rotation of the rotating part 1, the indicator 16 drives the connecting rod to rotate via the second linkage part 164, causing the connecting rod to drive the actuator of the external circuit breaker to perform an opening action, thereby realizing the linkage function between the leakage current protector and the external circuit breaker.

[0068] Example 2. Residual current device, configured as follows: Figure 7-8 As shown, the residual current device includes an RCCB type residual current tripping mechanism based on a residual current accessory, as described in Embodiment 1.

[0069] The residual current device includes a mounting housing, a mounting plate 15 is detachably connected inside the mounting housing, a rotating component 1 is rotatably connected inside the mounting housing and connected to the mounting housing via a reaction spring 2, a moving contact 100 is connected to the rotating component 1, a stationary contact 200 is fixedly connected to the mounting housing on one side of the moving contact 100, and an observation port is provided on the top of the mounting housing that mates with a first indicating surface 151 and a second indicating surface 163.

[0070] The leakage current protector has a first terminal block and a second terminal block installed at its two ends, respectively. The first terminal block and the second terminal block are the L pole and N pole, respectively. The inner end of the first terminal block is connected to the stationary contact 200. The first terminal block and the second terminal block are connected to each other via a power-taking mechanism. The power-taking mechanism includes a rotating shaft 300. A rotating component 1 is rotatably connected to a moving contact 100 via the rotating shaft 300. A contact spring 400 is fixedly connected to the rotating shaft 300. One end of the contact spring 400 is electrically connected to the moving contact 100, and the other end of the contact spring 400 is provided with a connection... The button power-taking spring 500 on the mounting plate 15 has one end in contact with the contact spring 400, and the other end of the button power-taking spring 500 forms a power-receiving part. Above the power-receiving part is a button spring 600 connected to the mounting plate 15. One end of the button spring 600 is connected to the second terminal block via a resistor 700. The resistor 700 and the second terminal block are electrically connected to each other via the resistor power-taking spring. The other end of the button spring 600 forms a test part, and above the test part is a test button 800 that is slidably connected to the mounting shell.

[0071] This embodiment limits the installation method of the RCCB type leakage current tripping mechanism, so that the RCCB type leakage current tripping mechanism in Embodiment 1 can be stably used in the leakage current protector and realize its leakage current protection function.

[0072] Based on this, this embodiment also specifically sets up a corresponding power-taking mechanism for the RCCB type leakage current tripping mechanism of Embodiment 1. Thus, when the leakage current protector is in the open state, the stationary contact 200 and the moving contact 100 are separated, and the power-taking mechanism is not energized. When the leakage current protector is in the closed state, the first terminal block, stationary contact 200, moving contact 100, contact spring 400, and button power-taking spring 500 are connected in sequence, and the energized part of the button power-taking spring 500 and the test part of the button spring 600 are vertically distributed and separated from each other. At this time, the operator presses the test button 800, causing the two to come into contact and become energized. The resistor 700 and the second terminal block are then connected to the first terminal block to form a load circuit, forming a residual operating current that meets IEC61008, thus realizing the button test function of the leakage current protector.

Claims

1. An RCCB-type leakage tripping mechanism based on a leakage current accessory, characterized in that: The device includes a mounting plate (15), the upper end of which forms a first indicating surface (151). The mounting plate (15) is provided with an actuator and an indicating element (16). The indicating element (16) is rotatably connected to the mounting plate (15) and connected to the mounting plate (15) via an indicating spring. The indicating element (16) is provided with a first linkage part (161) and an indicating part (162). The top of the indicating part (162) extends to the outside of the first indicating surface (151) and is provided with a second indicating surface (163). The actuator is provided with a trigger part (17) that cooperates with the first linkage part (161). When the residual current device is in the closed state, the trigger part (17) presses the first linkage part (161) to make the indicator (16) be in the closed position, and the second indicator surface (163) is located outside the first indicator surface (151) to realize the closed indication function of the residual current device. When the residual current device is in the open state, the trigger part (17) and the first linkage part (161) separate from each other, and the indicator part (162) is driven by the indicator spring to rotate to the open position, so that the second indicator surface (163) is misaligned with the first indicator surface (151) as it rotates, and the first indicator surface (151) realizes the open indication function of the residual current device. The actuator includes a rotating component (1), a reaction spring (2) connected to the rotating component (1), a lower connecting rod (3) rotatably connected to one side of the rotating component (1), a handle (5) connected to the outside of the lower connecting rod (3) via a U-shaped connecting rod (4), a middle connecting rod (6) fastened to the end of the lower connecting rod (3), a trigger part (17) formed at one end of the middle connecting rod (6), a mounting plate (15) rotatably connected to the other end of the middle connecting rod (6), and a middle part of the middle connecting rod (6) provided for engaging the lower connecting rod (3). The first limiting surface (601) for rotation limiting, the middle connecting rod (6) and the U-shaped connecting rod (4) form an angle and the angle direction is towards the first limiting surface (601), the middle connecting rod (6) is provided with a jump buckle (7) on one side, the jump buckle (7) is rotatably connected to the mounting plate (15) and connected to the mounting plate (15) via the jump buckle spring (8), the middle part of the jump buckle (7) is provided with a first driving part (701) that cooperates with the middle connecting rod (6), and the outside of the jump buckle (7) is connected to a release device (9) via a limiting component; The middle connecting rod (6) is used to limit the lower connecting rod (3) and the indicator (16) through the first limiting surface (601) when the circuit is closed, so that the lower connecting rod (3) cannot be pushed outward by the elastic force of the reaction spring (2); The jump spring (8) is used to apply a compressive force to the first drive unit (701) in the direction of the middle connecting rod (6); The limiting component is used to limit the trip lever (7) when the circuit is closed, so that the first drive unit (701) and the middle connecting rod (6) are separated from each other, and the limiting of the trip lever (7) is released after the trip unit (9) is pushed out; The jump buckle (7) is used to press the middle link (6) through the first drive part (701) after the limit is released by the elastic force of the jump buckle spring (8), so that the middle link (6) releases the limit on the lower link (3).

2. The RCCB type leakage tripping mechanism based on leakage accessories according to claim 1, characterized in that: The middle connecting rod (6) and the mounting plate (15) are connected to each other by a middle connecting rod spring (10), which is used to apply a compressive force to the middle connecting rod (6) toward the lower connecting rod (3).

3. The RCCB type leakage tripping mechanism based on leakage accessories according to claim 2, characterized in that: The middle connecting rod (6) forms a fastening groove (602) in the middle. A first limiting surface (601) and a second limiting surface (603) are formed on both sides of the fastening groove (602). An angle is formed between the first limiting surface (601) and the second limiting surface (603). The second limiting surface (603) is used to fit together with the lower connecting rod (3) under the squeezing force of the middle connecting rod spring (10).

4. The RCCB type leakage tripping mechanism based on leakage accessories according to claim 1, characterized in that: The limiting assembly includes a reset plate (11) and a latch (12). Both the reset plate (11) and the latch (12) are rotatably connected to the mounting plate (15). One side of the reset plate (11) is provided with a tripping surface (111) that cooperates with the tripping device (9), and the other side of the reset plate (11) is provided with a second driving part (112) that cooperates with the latch (12). The latch (12) and the mounting plate (15) are connected to each other by a latch spring (13). One side of the latch (12) is provided with a third limiting surface (121) for limiting the tripping latch (7). The reset plate (11) is used to press the latch (12) after the trip unit (9) is ejected; The latch (12) is used to separate the third limiting surface (121) from the jumper (7) after being squeezed by the latch (12), thereby releasing the limiting of the jumper (7); The locking spring (13) is used to drive the locking (12) to reset after the reset plate (11) disengages from the locking (12).

5. The RCCB type leakage tripping mechanism based on leakage accessories according to claim 4, characterized in that: The rotating part (1) is provided with a pressure plate (101) on one side to cooperate with the jump buckle (7). The pressure plate (101) is used to drive the jump buckle (7) to reset by squeezing after the gate is opened.

6. The RCCB type leakage tripping mechanism based on leakage accessories according to claim 4, characterized in that: The reset plate (11) has a reset part (113) on one side, and the outside of the reset part (113) is connected to the mounting plate (15) via a reset spring (14). The handle (5) is provided with a third drive part (501) that cooperates with the reset spring (14). The third drive unit (501) is used to squeeze and limit the reset spring (14) when the circuit is closed, so that the reset spring (14) and the reset plate (11) are separated from each other, and to release the squeezing and limiting of the reset spring (14) after the circuit is opened; The reset spring (14) is used to reset the reset plate (11) by rebounding after the limit is released, and to cause the reset plate (11) to retract and reset the trip unit (9) after the reset.

7. The RCCB type leakage tripping mechanism based on leakage accessories according to claim 1, characterized in that: The rotating component (1) has a linkage pressure block (102) on one side, and the indicator (16) is provided with a second linkage part (164) for connecting the external connecting rod and a pressure receiving part (165) that cooperates with the linkage pressure block (102). The linkage pressure block (102) is used to apply pressure to the pressure receiving part (165) as the rotating component (1) opens, so that the indicator (16) is rotated to the open position under pressure. The second linkage part (164) is used to keep the opening and closing states of the indicator (16) and the external connecting rod synchronized.

8. A residual current device (RCD), characterized in that: The residual current device includes an RCCB type residual current tripping mechanism based on a residual current accessory as described in any one of claims 1-7.

9. The residual current device according to claim 8, characterized in that: Includes a mounting housing, wherein the mounting plate (15) is detachably connected inside the mounting housing, and the top of the mounting housing is provided with an observation port that mates with the first indicator surface (151) and the second indicator surface (163).

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