A tripping and resetting mechanism for a leakage circuit breaker

Abstract

The present invention discloses a tripping and resetting mechanism for a leakage circuit breaker, comprising: a tripper provided with a push rod; an operating mechanism is operated to realize the opening and closing of the leakage circuit breaker; an indicator is linked with the operating mechanism, the indicator rotates relative to the shell, and the indicator is provided with a push block; the reset member rotates relative to the shell, and the reset member is located on the movement trajectory of the push rod; the reset elastic member cooperates with the reset member, the reset elastic member includes a main body, a first support leg and a second support leg, the first support leg is connected and fixed to the reset member, and the first support leg and the second support leg are respectively connected to the two ends of the main body; the second support leg includes a proximal area and a distal area, the proximal area is connected to the distal area, and the proximal area is closer to the main body than the distal area; the reset elastic member has a simple structure; the reset elastic member has a longer service life; the reset elastic member has no risk of getting stuck; the indicator wears less; and the push rod has a large free range of movement.

Description

Technical Field

[0001] The present invention relates to the field of electrical technology, and in particular to a tripping and resetting mechanism for a leakage circuit breaker. Background Art

[0002] Existing technology, such as Figure 1-Figure 2 As shown in , the leakage circuit breaker includes an indicator, a reset member, a trip unit, and an operating mechanism (for realizing opening and closing operations). The end of the operating mechanism is linked to the indicator, and the indicator and the reset member are matched by a torsion spring. The torsion spring is sleeved on the reset member. The torsion spring includes a fixed end and a movable end. The fixed end is connected and fixed to the reset member, and the movable end includes a hook-shaped bending feature. In the closed state, when a fault occurs, the top rod of the trip unit moves, driving the reset member to move. At the same time, the top rod also destroys the steady state of the operating mechanism (the top rod drives the transmission shaft to move and releases the locked state). It should be noted that at this time, the top rod will not directly drive the indicator to move, that is, the top rod cooperates with the reset member, and the torsion spring fixed on the reset member will not directly drive the indicator to move. When the top rod is pushed into place, the movable end will not directly drive the indicator to move. The operating mechanism performs the tripping operation, and the end of the operating mechanism is linked with the indicator. The indicator is driven by the operating mechanism to move to achieve the indication effect. At this time, the rotation of the indicator will cooperate with the hook-shaped bend of the movable end, and the indicator drives the torsion spring to move, achieving the reverse movement effect of the reset member, so that the reset member drives the top rod to reset and prepare for the next trip. In the entire linkage process, the top rod is the first to move and the last to reset. The indicator is in the last stage of the entire linkage process. Therefore, it is necessary to consider the positional relationship between the torsion spring and the indicator, and how to avoid the interaction between the torsion spring and the indicator. It can only form the indicator driving the torsion spring, and not the torsion spring driving the indicator to rotate. Therefore, the feature of the hook-shaped bend is extremely important, which can give way in the process from closing to opening and the reset effect in the opening process.

[0003] However, this type of torsion spring has the following problems: 1. It has a short lifespan. When the indicator acts on the hook-shaped feature at the torsion spring's active end, the left side of the hook-shaped feature is primarily affected by tension, according to force analysis. Therefore, when the residual current circuit breaker is in the disconnected state, the deformation caused by the force exerted by the indicator on the torsion spring is primarily borne by the hook-shaped feature at the active end, rather than the spring coil. The stress in the torsion spring is concentrated at the hook-shaped feature. This hook-shaped feature is equivalent to a spring coil with 0.34 effective turns, resulting in a mechanical lifespan far below the designed lifespan, and the primary failure mode is fracture at the hook-shaped feature.

[0004] 2. The torsion spring has the risk of being caught by the indicator. During testing, the hook-shaped feature was found to be caught by the indicator several times, causing the mechanism to fail.

[0005] 3. The indicator wears quickly. The force exerted by the indicator on the torsion spring mainly causes the left side of the hook-shaped feature at the movable end to be pulled, resulting in a serious loss of torque transmitted to the reset part. Therefore, the indicator needs to withstand a greater force, which accelerates the wear of the indicator.

[0006] 4. The free range of the tripper's ejector rod is small. At the end of its travel, the ejector rod is also subject to force from the torsion spring.

[0007] 5. The fixed end of the torsion spring will generate vibration waves, resulting in serious loss of force applied to the reset part, affecting the reset of the push rod.

[0008] To address the problem of insufficient strength of the hook-shaped feature, those skilled in the art have proposed adding a spring coil to the hook-shaped feature, i.e., a torsion spring with two spring coils, one of which is mounted on the reset member and the other is connected to the hook-shaped feature, to increase the strength. However, experimental tests have shown that the above defects still exist and the problem of the torsion spring's life span cannot be solved. Summary of the Invention

[0009] Therefore, the technical problem to be solved by the present invention is how to increase the service life of the reset mechanism. To this end, a trip reset mechanism for a leakage circuit breaker comprises:

[0010] A housing, wherein the housing is provided with a receiving cavity;

[0011] A tripper, the tripper being accommodated in the accommodating cavity; the tripper being provided with a push rod;

[0012] An operating mechanism, the operating mechanism being accommodated in the accommodating cavity; the operating mechanism is operated to realize the opening and closing of the leakage circuit breaker;

[0013] An indicator member, the indicator member is accommodated in the accommodating cavity; the indicator member is linked to the operating mechanism, the indicator member rotates relative to the housing, and the indicator member is provided with a push block;

[0014] a reset member, the reset member being accommodated in the accommodating cavity, the reset member being rotated relative to the housing, and the reset member being located on a motion track of the ejector rod;

[0015] a reset elastic member, the reset elastic member cooperates with the reset member, the reset elastic member includes a main body, a first leg and a second leg, the first leg is connected and fixed to the reset member, the first leg and the second leg are respectively connected to two ends of the main body; the second leg includes a proximal region and a distal region, the proximal region is connected to the distal region, and the proximal region is closer to the main body than the distal region;

[0016] In the first state, a gap is provided or abuts against each other between the second leg and the push block; in the second state, the tripper is actuated, the push rod drives the reset member to rotate, so that the operating mechanism is actuated, the operating mechanism drives the indicator member to rotate, the push block abuts against the proximal region, the push block drives the reset elastic member to move, and the reset elastic member drives the reset member to return the push rod to its initial position.

[0017] The second support leg includes a first bending portion, a first straight leg, a second bending portion, and a second straight leg. One end of the first bending portion is connected to the main body, the first straight leg connects the other end of the first bending portion and one end of the second bending portion, and the other end of the second bending portion is connected to the second straight leg; the first straight leg and part of the second bending portion form the proximal area; the remaining part of the second bending portion and the second straight leg form the distal area.

[0018] The second straight leg is located on a side of an imaginary extension line of the first straight leg close to the first supporting leg.

[0019] The push block is in point contact or surface contact with the proximal end region.

[0020] The push block is provided with a reinforcement portion.

[0021] The reset member includes a first positioning shaft, a first connecting plate, and a second connecting plate. The first connecting plate is connected to the first positioning shaft and the second connecting plate respectively. The first connecting plate is provided with a limiting groove, and the first support leg is partially embedded in the limiting groove; the second connecting plate is provided with a through hole, and the second support leg passes through the through hole, and the second support leg is movable relative to the through hole.

[0022] The second connecting plate is provided with a boss, and the through hole is provided on the boss.

[0023] The first positioning shaft is arranged in a stepped manner, and the reset elastic member is sleeved on the first positioning shaft.

[0024] One of the indicator and the operating mechanism is provided with a connecting portion, and the other one of the indicator and the operating mechanism is provided with a connecting groove matched with the connecting portion.

[0025] The connecting portion is provided on the indicator, the line connecting the center of the connecting portion and the rotation center of the indicator is L1, the line connecting the center of the push block and the rotation center of the indicator is L2, and the angle formed by the projections of L1 and L2 is greater than or equal to 90°.

[0026] The technical solution of the present invention has the following advantages:

[0027] 1. The present invention provides a tripping and resetting mechanism for a leakage circuit breaker. With this structural arrangement, the push block directly acts on the proximal region of the resetting elastic member. This point of action has a stable structure, small torque, and small vibration during mechanism movement. The resetting elastic member is less likely to break and has a long service life.

[0028] 2. The present invention provides a tripping and resetting mechanism for a leakage circuit breaker, in which the first straight leg and part of the second bent portion cooperate to form a proximal area. The push block can act on the first straight leg, and the push block can also directly act on the area of ​​the second bent portion close to the first straight leg to form a driving effect. In addition, the second bent portion can also partially decompose the force to prevent the second leg from breaking.

[0029] 3. The present invention provides a tripping and resetting mechanism for a leakage circuit breaker, in which the second straight leg is located close to the first leg. When the force is decomposed and acts on the second straight leg, a partial force will also be generated to move toward the first leg, thereby improving the driving effect.

[0030] 4. The present invention provides a tripping and resetting mechanism for a leakage circuit breaker, in which a reinforcement portion is provided to increase the strength of the push block, ensuring that the push block will not break during the pushing process. The push block here can be an arc surface, and the arc surface forms point contact with the first straight leg or the first bent portion.

[0031] 5. The present invention provides a tripping and resetting mechanism for a leakage circuit breaker, wherein the first positioning shaft forms a rotation effect of the reset member relative to the housing, that is, the reset member as a whole rotates about the central axis of the first positioning shaft, the first connecting plate and the second connecting plate are vertically connected, and the limiting groove forms a limiting and fixing effect, so that the first leg is fixed and the through hole forms a movable effect of the second leg, and when the second leg is against the side wall of the through hole, it can also play a buffering and shock-absorbing effect, further preventing vibration waves.

[0032] 6. In the tripping and resetting mechanism of the leakage circuit breaker provided by the present invention, the setting of the boss can better achieve the cooperation with the second leg.

[0033] 7. The tripping and resetting mechanism of a leakage circuit breaker provided by the present invention has a stepped arrangement to achieve sleeve fixation of the main body. Here, the main body of the reset elastic member is sleeved on the first positioning shaft to form a fixing effect of the reset elastic member.

[0034] 8. The present invention provides a tripping and resetting mechanism for a leakage circuit breaker, in which an indicator cooperates with an operating mechanism to form a coordinated effect between the operating mechanism and the indicator. When the operating mechanism is in the closing position, the indicator indicates the closing state; conversely, when the operating mechanism is in the opening position, the indicator indicates the opening state. The two are synchronously set. The component that cooperates with the indicator here can be located at the end of the operating mechanism transmission or at the middle position of the operating mechanism, but the push rod cannot directly act on the indicator.

[0035] 9. The present invention provides a tripping and resetting mechanism for a leakage circuit breaker. The connection portion and the push block are arranged on the indicator to form a layout effect. When the circuit is closed, the push block is located to the upper right of the first bend, with a gap between the two. Even if the reset member rotates, it will not affect the indicator. When the push rod extends to the extreme position, pushing the reset member to the farthest position, at this time, there can still be a gap between the reset elastic member and the push block (i.e., the two are not in contact), or the proximal region can just abut against the push block (at the critical point). BRIEF DESCRIPTION OF THE DRAWINGS

[0036] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the specific embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0037] Figure 1 It is a structural diagram of a tripping and resetting mechanism in the prior art;

[0038] Figure 2 It is a partial front view of the trip reset mechanism in the prior art;

[0039] Figure 3 A schematic structural diagram of a tripping and resetting mechanism of a leakage circuit breaker provided by the present invention in an open state;

[0040] Figure 4 A partial front view of the switch-off state provided by the present invention;

[0041] Figure 5 A schematic structural diagram of a tripping and resetting mechanism of a leakage circuit breaker provided by the present invention in a closed state;

[0042] Figure 6 A partial front view of the closing state provided by the present invention;

[0043] Figure 7 A schematic diagram of the partial structure of the tripping and resetting mechanism provided by the present invention;

[0044] Figure 8 for Figure 7 Exploded diagram;

[0045] Figure 9 A schematic structural diagram of the resetting elastic member provided by the present invention;

[0046] Figure 10 This is a structural schematic diagram of the indicator provided by the present invention.

[0047] Description of reference numerals:

[0048] 11. Release; 12. Operating mechanism; 13. Reset member; 14. Indicator; 15. Reset elastic member; 16. Connecting portion; 17. Connecting groove; 111. Push rod; 121. Moving contact frame; 131. First positioning axis; 132. First connecting plate; 133. Second connecting plate; 141. Push block; 142. Second positioning axis; 143. Connecting rib; 151. Main body; 152. First support leg; 153. Second support leg; 1321. Limiting groove; 1322. Limiting block; 1331. Through hole; 1332. Boss; 1411. Reinforcement portion; 1531. Proximal region; 1532. Distal region; 1533. First bending portion; 1534. First straight leg; 1535. Second bending portion; 1536. Second straight leg. DETAILED DESCRIPTION

[0049] The technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0050] In the description of the present invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate and simplify the description of the present invention. They are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation, and therefore should not be construed as limitations on the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0051] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0052] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0053] Example 1

[0054] This embodiment provides a tripping and resetting mechanism for a leakage circuit breaker, as shown in the attached Figure 3-10 As shown,

[0055] The shell is provided with a receiving cavity.

[0056] The tripper 11 is accommodated in the accommodating chamber; the tripper 11 is provided with a push rod 111. It should be noted that when a leakage fault occurs in the main circuit, the tripper 11 is actuated, driving the push rod 111 to move outward. In this embodiment, the push rod 111 moves horizontally to the right, driving the reset member 13 and the transmission shaft (a component of the operating mechanism 12). Since the operating mechanism 12 is in a steady state when the switch is closed, the external force only needs a small force to break the steady state, causing the operating mechanism 12 to move as a whole, that is, the operating mechanism 12 forms an opening operation. Here, the push rod 111 can act directly on the transmission shaft, or the push rod 111 can drive the reset member 13 to drive the transmission shaft to move. Those skilled in the art can adjust it according to actual needs. Since the transmission shaft is a prior art, it is not drawn in the attached drawings.

[0057] The operating mechanism 12 is accommodated in the accommodating chamber; the operation of the operating mechanism 12 realizes the opening and closing of the leakage circuit breaker. How the operating mechanism 12 realizes the opening and closing is a prior art, so it will not be described in detail. However, it should be noted that the movement of the top rod 111 releases the steady state of the operating mechanism 12, but the top rod 111 does not directly act on the indicator 14, and the top rod 111 does not act on the indicator 14 through the reset member 13 or the elastic reset member 13. Only after the operating mechanism 12 releases the steady state, the components of the operating mechanism 12 drive the indicator 14 to move, and the movement process is a one-way movement, and no interlacing will occur. If the top rod 111 directly acts on the indicator 14, it will cause the indicator 14 to fail to indicate normally.

[0058] The indicator 14 is housed in the accommodating cavity. The indicator 14 can be partially housed in the accommodating cavity, with the remaining portion of the indicator 14 located outside the accommodating cavity. Alternatively, the housing can be provided with a window that communicates with the accommodating cavity, through which the indicator 14 can be observed. Alternatively, a transparent window can be used to create an observation effect. In this embodiment, the indicator 14 can be a color indicator, a symbol indicator, a text indicator, or a combination of two or more of the above. The indicator 14 is linked to the operating mechanism 12, and here, the indicator 14 is linked to one of the components of the operating mechanism 12. The indicator 14 rotates relative to the housing, and the indicator 14 is provided with a push block 141.

[0059] The reset member 13 is accommodated in the accommodating cavity. The reset member 13 rotates relative to the shell. The reset member 13 is located on the movement track of the ejector rod 111. When the ejector rod 111 moves, the ejector rod 111 drives the reset member 13 to rotate.

[0060] The reset elastic member 15 cooperates with the reset member 13 to form an elastic drive effect, causing the reset member 13 to move, thereby forming a reset effect for the top rod 111. The reset elastic member 15 includes a main body 151, a first leg 152, and a second leg 153. The first leg 152 and the second leg 153 are respectively connected to the two ends of the main body 151. Here, the main body 151 specifically refers to a spring coil. The number of coils of the spring coil can be adjusted according to actual needs. The main body 151 can be mounted on the reset member 13, or the main body 151 can be accommodated in the reset member 13. The first leg 152 is fixedly connected to the reset member 13, that is, the first leg 152 forms a fixed end. The second leg 153 is a movable end. The second leg 153 includes a proximal region 1531 and a distal region 1532 . The proximal region 1531 is connected to the distal region 1532 . The proximal region 1531 is closer to the main body 151 than the distal region 1532 , and the distance between the proximal region 1531 and the main body 151 is shorter.

[0061] The first state, specifically the closed state, is described herein. In the closed state, a gap or abutment is provided between the second leg 153 and the push block 141. The size of the gap can be adjusted based on actual needs, but consideration must be given to whether the travel of the push block 141 toward the second leg 153 is sufficient to reset the ejector pin 111. When the second leg 153 abuts the push block 141, the second leg 153 possesses a certain degree of elasticity, forming a soft connection. When control accuracy is sufficient, the tripping force will not affect the movement of the push block 141. The second state refers to when a fault occurs in the main circuit, the trip unit 11 receives a trip signal, the trip unit 11 is activated, the top rod 111 drives the reset member 13 to rotate, and when the reset member 13 rotates, the reset elastic member 15 also moves accordingly. The second leg 153 does not directly drive the indicator 14 to move. When the top rod 111 extends to the extreme position, the reset member 13 is pushed to the farthest position. At this time, there may still be a gap between the reset elastic member 15 and the push block 141 (that is, the two are not in contact), or the proximal region 1531 may just be against the push block 141 (at the critical point). The top rod 111 causes the operating mechanism 12 to move, and the top rod 111 destroys the steady state of the operating mechanism 12. Here, the top rod 111 can directly destroy it, or the top rod 111 can drive the reset member 13 to move and destroy the steady state of the operating mechanism 12. When the steady state is destroyed, the operating mechanism 12 is actuated, driving the indicator 14 to rotate. At this time, the push block 141 also rotates, and the push block 141 abuts against the proximal region 1531. The push block 141 drives the reset elastic member 15 to move, and the reset elastic member 15 drives the reset member 13 to return the push rod 111 to its initial position. In other words, the proximal region 1531 is located on the rotation trajectory of the push block 141. This is equivalent to when the operating mechanism 12 is in the open position, the indicator 14 indicates open, and the push rod 111 returns to its initial position. With this structural arrangement, push block 141 directly acts on proximal region 1531, with the point of action close to main body 151. Compared to distal region 1532, this point of action is less susceptible to breakage. Furthermore, during the actuation process, first leg 152 is less susceptible to vibration waves, allowing the driving force to better act on reset member 13, effectively resetting push rod 111. Furthermore, during the opening operation, reset elastic member 15 does not act on indicator member 14, creating a yielding effect. This point of action is structurally stable, with low torque and minimal vibration during mechanism movement. The reset elastic member 15 is less susceptible to breakage and has a long service life.

[0062] Specifically, as attached Figure 3-Figure 9As shown, the second leg 153 includes a first bending portion 1533, a first straight leg 1534, a second bending portion 1535, and a second straight leg 1536. One end of the first bending portion 1533 is connected to the main body 151, the first straight leg 1534 connects the other end of the first bending portion 1533 and one end of the second bending portion 1535, and the other end of the second bending portion 1535 is connected to the second straight leg 1536; the first straight leg 1534 and part of the second bending portion 1535 form a proximal area 1531; the remaining part of the second bending portion 1535 and the second straight leg 1536 form a distal area 1532. The first straight leg 1534 and part of the second bent portion 1535 cooperate to form the proximal area 1531. The push block 141 can act on the first straight leg 1534, and the push block 141 can also directly act on the area of ​​the second bent portion 1535 close to the first straight leg 1534 to form a driving effect. In addition, the second bent portion 1535 can also partially decompose the force to prevent the second leg 153 from breaking.

[0063] Specifically, as attached Figure 3-Figure 9 As shown, second straight leg 1536 is located on the side of the imaginary extension line of first straight leg 1534 that is closer to first leg 152. This location of second straight leg 1536 near first leg 152 allows the force decomposition acting on second straight leg 1536 to also partially move toward first leg 152, thereby enhancing the driving effect. In this embodiment, second straight leg 1536 is located to the left of the imaginary extension line of first straight leg 1534.

[0064] Specifically, the push block 141 and the proximal region 1531 are in point contact or surface contact. Here, the push block 141 may have a curved surface facing the proximal region 1531, which cooperates with the proximal region 1531 to form a point contact effect. Alternatively, the push block 141 may have a straight surface facing the proximal region 1531, which cooperates with the proximal region 1531 to form surface contact. Those skilled in the art may adjust this according to actual needs.

[0065] Specifically, the push block 141 is provided with a reinforcement portion 1411. The provision of the reinforcement portion 1411 increases the strength of the push block 141 and ensures that the push block 141 does not break during the pushing process. Here, the push block 141 can be an arc surface, and the arc surface forms a point contact with the first straight leg 1534 or the first bent portion 1533.

[0066] Specifically, as attached Figure 3-Figure 8As shown, the reset member 13 includes a first positioning shaft 131, a first connecting plate 132, and a second connecting plate 133. The first connecting plate 132 is connected to the first positioning shaft 131 and the second connecting plate 133, respectively. Here, the top surface of the first connecting plate 132 is connected to the first positioning shaft 131, and the side surface of the first connecting plate 132 is connected to the second connecting plate 133. Taking the three-dimensional coordinate axis as an example, the first positioning shaft 131 is located on the Z axis. The first positioning shaft 131 and the first connecting plate 132 are connected along the Z axis, while the first connecting plate 132 and the second connecting plate 133 are connected along the X axis, that is, the first connecting plate 132 and the second connecting plate 133 are vertically connected. The first positioning shaft 131 cooperates with the housing to achieve a rotation effect. The main body 151 cooperates with the first positioning shaft 131. Here, the main body 151 can be sleeved onto the positioning shaft, with the first and second legs 152, 153 extending radially outward. Alternatively, the first positioning shaft 131 defines a cavity, with the main body 151 housed within the cavity, and the first and second legs 152, 153 extending outward through the side walls of the cavity. The first connecting plate 132 defines a retaining groove 1321, into which the first leg 152 partially fits, thereby securing the first leg 152 in place and preventing it from moving. The second connecting plate 133 is provided with a through hole 1331, through which the second leg 153 passes. The second leg 153 is movable relative to the through hole 1331, that is, the second leg 153 is movable and can move within the through hole 1331. However, the sidewalls of the through hole 1331 limit the range of motion of the second leg 153. In this embodiment, the distal region 1532 passes through the through hole 1331. The first positioning axis 131 enables the reset member 13 to rotate relative to the housing, that is, the reset member 13 as a whole rotates about the central axis of the first positioning axis 131. The first connecting plate 132 and the second connecting plate 133 are perpendicularly connected. The limiting groove 1321 provides a fixed position, thereby securing the first leg 152 and allowing the second leg 153 to move. Moreover, when the second leg 153 abuts against the sidewalls of the through hole 1331, it also provides a buffering and shock-absorbing effect, further preventing vibration waves.

[0067] Specifically, as attached Figure 3-Figure 8 As shown, the second connecting plate 133 is provided with a boss 1332, which extends in the Y-axis direction. Specifically, boss 1332 is provided on the front side of the second connecting plate 133, and a through hole 1331 is provided in boss 1332, which extends through boss 1332 along the Z-axis. The provision of boss 1332 better achieves cooperation with the second support leg 153. The first connecting plate 132 and the second connecting plate 133 form a similar transverse T-shaped structure, with boss 1332 located on the front side. The rear side can be used to drive the transmission shaft, thereby disrupting the stability of the operating mechanism 12.

[0068] Specifically, the first positioning shaft 131 is arranged in a stepped configuration, and the resetting elastic member 15 is sleeved on the first positioning shaft 131. The stepped configuration allows the main body 151 to be sleeved and fixed. Here, the main body 151 of the resetting elastic member 15 sleeves on the first positioning shaft 131, thereby securing the resetting elastic member 15. Alternatively, the first positioning shaft 131 may have a cavity-shaped structure, with the main body 151 housed within the cavity, creating a concealed structure.

[0069] Specifically, the first connecting plate 132 is provided with a limiting block 1322 , and the limiting block 1322 forms a part of the side wall of the limiting groove 1321 .

[0070] Specifically, the restoration member 13 is integrally formed.

[0071] Specifically, the resetting elastic member 15 is a torsion spring structure.

[0072] Specifically, as attached Figure 3-Figure 8 As shown, in the closed position, the first connecting plate 132 is positioned vertically downward, the second connecting plate 133 extends horizontally to the right, the first leg 152 extends vertically downward, and the second leg 153 extends obliquely toward the lower right. When pushed by the push rod 111, the entire reset member 13 rotates toward the right with the first positioning axis 131 as the rotation center. When reset by the indicator 14, that is, the open position, the reset member 13 also returns to its initial position, that is, the first connecting plate 132 is positioned vertically downward, the second connecting plate 133 extends horizontally to the right, the first leg 152 extends vertically downward, and the second leg 153 extends obliquely toward the lower right.

[0073] Specifically, as attached Figure 3-Figure 8 As shown, one of the indicator member 14 and the operating mechanism 12 is provided with a connecting portion 16, and the other is provided with a connecting groove 17 that cooperates with the connecting portion 16. When the indicator member 14 is provided with the connecting portion 16, the operating mechanism 12 is provided with the connecting groove 17; conversely, when the indicator member 14 is provided with the connecting groove 17, the operating mechanism 12 is provided with the connecting portion 16. In this embodiment, the connecting portion 16 is provided on the indicator member 14, and the connecting groove 17 is provided on the operating mechanism 12. The indicator member 14 cooperates with the operating mechanism 12 to form a coordinated effect between the operating mechanism 12 and the indicator member 14. When the operating mechanism 12 is in the closed position, the indicator member 14 indicates the closed state; conversely, when the operating mechanism 12 is in the open position, the indicator member 14 indicates the open state. The two are synchronously arranged. The component that cooperates with the indicator member 14 can be located at the end of the transmission of the operating mechanism 12 or in the middle of the operating mechanism 12. However, the push rod 111 cannot directly act on the indicator member 14. Here, the connecting portion 16 may be a protruding structure, and the connecting groove 17 may be a U-shaped groove structure. Further, the operating mechanism 12 includes a movable contact frame 121 , and the connecting groove 17 is provided on the movable contact frame 121 .

[0074] Specifically, as attached Figure 10 As shown, the connecting portion 16 is disposed on the indicator member 14. The line connecting the center of the connecting portion 16 and the rotation center of the indicator member 14 is L1, and the line connecting the center of the push block 141 and the rotation center of the indicator member 14 is L2. The angle formed by the projections of L1 and L2 is greater than or equal to 90°. The distribution of the connecting portion 16 and the push block 141 on the indicator member 14 forms a layout effect. When the switch is closed, the connecting portion 16 tilts toward the lower right to mate with the connecting groove 17, while the push block 141 is horizontally facing left, or the push block 141 tilts toward the upper left. At this time, the reset elastic member 15 is located on the left side of the indicator member 14, the second leg 153 is tilted toward the lower right, and the push block 141 is located to the upper right of the first bent portion 1533. There is a gap between the two. Even if the reset member 13 rotates, it will not affect the indicator member 14. When the top rod 111 extends and moves to the extreme position, the reset member 13 is pushed to the farthest position. At this time, there may still be a gap between the reset elastic member 15 and the push block 141 (that is, the two are not in contact), or the proximal region 1531 may just be against the push block 141 (located at the critical point). During the tripping operation, the indicator 14 rotates clockwise, so that the push block 141 and the proximal region 1531 are against each other, forming a driving effect, and finally achieving the effect of resetting the top rod 111. In addition, those skilled in the art can also adjust the position of the operating mechanism 12 to adjust the position of the connecting part 16 so that the angle formed by L1 and L2 is an acute angle. The solution in this embodiment is based on the existing leakage protector, and adjusts the trip reset structure with the minimum modification, which increases the service life of the elastic reset member 13 and the service life of the entire leakage protector, saving production costs and R&D costs.

[0075] Specifically, indicator member 14 includes a second positioning shaft 142, and a push block 141 connected to the side wall of second positioning shaft 142. That is, push block 141 is located in the radial direction of second positioning shaft 142, and connecting portion 16 is connected to the side wall of second positioning shaft 142 via connecting ribs 143. Here, push block 141 and connecting portion 16 are not located on the same plane. The length of push block 141 and the length of connecting ribs 143 can be adjusted according to actual needs.

[0076] Specifically, the structure of this embodiment has the following advantages:

[0077] 1. The resetting elastic member 15 has a simple structure and only has one spring coil in this embodiment.

[0078] 2. Longer lifespan of the reset spring 15. Based on force point analysis, the force exerted by the indicator 14 on the reset spring 15 causes the second pin 153 to experience a torsional force. Consequently, the stress on the reset spring 15 is primarily on the spring coil, making the actual lifespan of the reset spring 15 closer to the ideal design value.

[0079] 3. The resetting elastic member 15 has no risk of getting stuck. The second pin 153 of the resetting elastic member 15 has no hook-shaped feature and cannot be stuck by the indicator member 14.

[0080] 4. Less wear on indicator 14. The new structure reduces the force loss transmitted to reset element 13. Therefore, while still ensuring the release is reset, the reset spring 15 can be lighter. This reduces the force on indicator 14 and significantly reduces wear.

[0081] 5. The ejector rod 111 has a large free range of motion. The ejector rod 111 can drive the reset member 13 to rotate at a larger angle, ensuring that the mechanism tripping is more reliable.

[0082] Obviously, the above embodiments are merely examples for clarity of explanation and are not intended to limit the implementation methods. Those skilled in the art will readily appreciate that other variations or modifications based on the above descriptions are possible. It is not necessary and impossible to enumerate all implementation methods here. Obvious variations or modifications arising therefrom remain within the scope of protection of the present invention.

Claims

1. A tripping and resetting mechanism for a leakage circuit breaker, characterized in that: include: A housing, wherein the housing is provided with a receiving cavity; A release (11), the release (11) being accommodated in the accommodating cavity; the release (11) being provided with a push rod (111); An operating mechanism (12), the operating mechanism (12) being accommodated in the accommodating cavity; the operating mechanism (12) is operated to realize the opening and closing of the leakage circuit breaker; An indicator (14), the indicator (14) being accommodated in the accommodating cavity; the indicator (14) being linked to the operating mechanism (12), the indicator (14) being rotated relative to the housing, and the indicator (14) being provided with a push block (141); a reset member (13), the reset member (13) being accommodated in the accommodating cavity, the reset member (13) rotating relative to the housing, and the reset member (13) being located on a motion trajectory of the ejector rod (111); A reset elastic member (15), the reset elastic member (15) cooperates with the reset member (13), the reset elastic member (15) comprises a main body (151), a first leg (152) and a second leg (153), the first leg (152) is connected and fixed to the reset member (13), the first leg (152) and the second leg (153) are respectively connected to two ends of the main body (151); the second leg (153) comprises a proximal region (1531) and a distal region (1532), the proximal region (1531) is connected to the distal region (1532), and the proximal region (1531) is closer to the main body (151) than the distal region (1532); In the first state, a gap or abutment is provided between the second leg (153) and the push block (141); in the second state, the tripper (11) is actuated, the push rod (111) drives the reset member (13) to rotate, so that the operating mechanism (12) is actuated, the operating mechanism (12) drives the indicator member (14) to rotate, the push block (141) and the proximal region (1531) are abutted against each other, the push block (141) drives the reset elastic member (15) to move, the reset elastic member (15) drives the reset member (13) so that the push rod (111) returns to its initial position; the second leg (153) includes a first bending portion (1533), A first straight leg (1534), a second bent portion (1535), and a second straight leg (1536), wherein one end of the first bent portion (1533) is connected to the main body (151), the first straight leg (1534) connects the other end of the first bent portion (1533) and one end of the second bent portion (1535), and the other end of the second bent portion (1535) is connected to the second straight leg (1536); the first straight leg (1534) and part of the second bent portion (1535) form the proximal region (1531); the remaining part of the second bent portion (1535) and the second straight leg (1536) form the distal region (1532).

2. The tripping and resetting mechanism of the leakage circuit breaker according to claim 1, characterized in that: The second straight leg (1536) is located on a side of an imaginary extension line of the first straight leg (1534) close to the first supporting leg (152).

3. The tripping and resetting mechanism of the leakage circuit breaker according to claim 1, characterized in that: The push block (141) and the proximal region (1531) are in point contact or surface contact.

4. The tripping and resetting mechanism of the leakage circuit breaker according to claim 1, characterized in that: The push block (141) is provided with a reinforcement portion (1411).

5. The tripping and resetting mechanism of the leakage circuit breaker according to claim 1, characterized in that: The reset member (13) includes a first positioning shaft (131), a first connecting plate (132), and a second connecting plate (133); the first connecting plate (132) is connected to the first positioning shaft (131) and the second connecting plate (133), respectively; the first connecting plate (132) is provided with a limiting groove (1321), and the first support leg (152) is partially embedded in the limiting groove (1321); the second connecting plate (133) is provided with a through hole (1331), the second support leg (153) passes through the through hole (1331), and the second support leg (153) is movable relative to the through hole (1331).

6. The tripping and resetting mechanism of the leakage circuit breaker according to claim 5, characterized in that: The second connecting plate (133) is provided with a boss (1332), and the through hole (1331) is provided on the boss (1332).

7. The tripping and resetting mechanism of the leakage circuit breaker according to claim 5, characterized in that: The first positioning shaft (131) is arranged in a stepped manner, and the resetting elastic member (15) is sleeved on the first positioning shaft (131).

8. The tripping and resetting mechanism of the leakage circuit breaker according to claim 1, characterized in that: One of the indicator (14) and the operating mechanism (12) is provided with a connecting portion (16), and the other of the indicator (14) and the operating mechanism (12) is provided with a connecting groove (17) matched with the connecting portion (16).

9. The tripping and resetting mechanism of the leakage circuit breaker according to claim 8, characterized in that: The connecting portion (16) is provided on the indicator (14), a line connecting the center of the connecting portion (16) and the rotation center of the indicator (14) is L1, a line connecting the center of the push block (141) and the rotation center of the indicator (14) is L2, and an angle formed by the projections of L1 and L2 is greater than or equal to 90°.

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