Tripping reset mechanism of residual-current circuit breaker

Abstract

The invention discloses a tripping reset mechanism of a residual-current circuit breaker. The tripping reset mechanism is characterized in that a tripper is provided with an ejector rod; the operating mechanism operates to realize opening and closing of the residual-current circuit breaker; the indicating piece is linked with the operating mechanism, rotates relative to the shell and is provided with a push block; the reset piece rotates relative to the shell and is located on the motion trail of the ejector rod. The reset elastic part is matched with the reset part and comprises a main body, a first supporting leg and a second supporting leg, the first supporting leg is fixedly connected with the reset part, and the first supporting leg and the second supporting leg are connected with the two ends of the main body respectively; the second supporting leg comprises a near-end area and a far-end area, the near-end area is connected with the far-end area, and the near-end area is closer to the main body relative to the far-end area; the reset elastic piece is simple in structure; the service life of the reset elastic piece is longer; the reset elastic piece has no clamping risk; abrasion of the indicating piece is small; the free movement range of the ejector rod is large.

Description

Technical Field

[0001] The invention relates to the field of electrical technology, and in particular to a tripping and resetting mechanism of 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 release, and an operating mechanism (for realizing opening and closing operations). The end of the operating mechanism is linked with the indicator. 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 release 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 opening operation, and the end of the operating mechanism is linked with the indicator. The operating mechanism drives the indicator to move to achieve the indication effect. At this time, the rotation of the indicator will cooperate with the hook-shaped bend at the movable end, and the indicator drives the torsion spring to move, realizing the reverse movement effect of the reset member, so that the reset member drives the top rod to reset and prepare for the next tripping. In the entire linkage process, the top rod is the first to move and the last to reset. The indicator is located 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. How to avoid the action relationship between the torsion spring and the indicator can only form the indicator driving the torsion spring, and the torsion spring cannot drive the indicator to rotate. Therefore, the feature of the hook-shaped bend is extremely important, which can make way for the process from closing to opening and the reset effect during the opening process.

[0003] However, the problems with this torsion spring are: 1. The torsion spring has a short lifespan; when the indicator acts on the hook-shaped feature at the active end of the torsion spring, according to the force point analysis, the left side of the hook-shaped feature is mainly affected by the tension, so when the residual current circuit breaker is in the disconnected state, the deformation caused by the force of the indicator acting on the torsion spring mainly occurs at the hook-shaped feature at the active end of the torsion spring instead of on the spring coil. The stress of the torsion spring is concentrated at the hook-shaped feature. The hook-shaped feature is equivalent to a spring coil with an effective number of turns of 0.34, so the mechanical life of the torsion spring is much lower than the design life, and the failure mode is mainly the fracture at the hook-shaped feature.

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

[0005] 3. The indicator wears quickly. The force of the indicator on the torsion spring is mainly to pull the left side of the hook-shaped feature of the movable end, which causes serious loss of torque transmitted to the reset part. Therefore, the indicator needs to bear a greater force, which accelerates the wear of the indicator.

[0006] 4. The free range of the tripper push rod is small. The push rod will also bear the force from the torsion spring at the end of the stroke.

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

[0008] To solve the problem of insufficient strength of the hook-shaped feature, technicians in this field have added spring coils to the hook-shaped feature, that is, the torsion spring has two spring coils, one spring coil is sleeved on the reset member, and the other spring coil is connected to the hook-shaped feature to increase the strength. However, experimental tests show that the above defects still exist and the problem of the life of the torsion spring 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 releaser, the releaser is accommodated in the accommodating chamber; the releaser is provided with a push rod;

[0012] An operating mechanism, the operating mechanism is accommodated in the accommodating chamber; 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 with 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 is accommodated in the accommodating cavity, the reset member rotates relative to the housing, and the reset member is located on the movement track of the ejector rod;

[0015] A reset elastic member, the reset elastic member cooperates with the reset member, the reset elastic member comprises 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 comprises 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 the second leg abuts against the push block; in the second state, the releaser 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 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 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 arranged on the boss.

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

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

[0025] The connecting portion is arranged 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 tripping and resetting mechanism of a leakage circuit breaker provided by the present invention adopts such a structural setting that the push block directly acts on the proximal area of ​​the resetting elastic member. The structure of this action point is stable, the torque is small, the vibration during the movement of the mechanism is small, the resetting elastic member is not easy to break, and the service life is long.

[0028] 2. The present invention provides a tripping and resetting mechanism for a leakage circuit breaker, in which a first straight leg and a part of a second bent portion cooperate to form a proximal area, a push block can act on the first straight leg, and the push block can also directly act on an area of ​​the second bent portion close to the first straight leg to form a driving effect, and 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, wherein the second straight leg is located close to the first leg. When the force is decomposed and acts on the second straight leg, a part of the force moving toward the first leg is also formed, thereby improving the driving effect.

[0030] 4. The tripping and resetting mechanism of a leakage circuit breaker provided by the present invention has a reinforcing portion which increases the strength of the push block and ensures that the push block will not break during the pushing process. The push block here can be an arc surface which 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 axis forms an effect of rotation of the resetting member relative to the shell, that is, the resetting member as a whole rotates about the central axis of the first positioning axis, 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 an 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 to further prevent vibration waves.

[0032] 6. In the tripping and resetting mechanism of a 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 fixing 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 cooperation effect between the operating mechanism and the indicator. When the operating mechanism is in a closing position, the indicator indicates a closing state; conversely, when the operating mechanism is in an opening position, the indicator indicates an opening state. The two are synchronously arranged. The component that cooperates with the indicator here can be located at the end of the transmission of the operating mechanism 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, in which the connection part and the push block are distributed on the indicator, forming a layout effect. In the closed state, the push block is located on the upper right of the first bending part, and a gap is provided between the two. Even if the reset part rotates, it will not affect the indicator. When the top rod extends to the extreme position, so that the reset part is pushed to the farthest position, at this time, there can still be a gap between the reset elastic part and the push block (that is, the two are not in contact), or the proximal area can just abut against the push block (located at the critical point). BRIEF DESCRIPTION OF THE DRAWINGS

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

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

[0038] Figure 2 It is a partial front view of a 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 open 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 of

[0045] Fig. 9 A schematic diagram of the structure of the resetting elastic member provided by the present invention;

[0046] Fig.10 This is a schematic structural 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 part; 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; 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 described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are 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", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0051] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to 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-Figure 10 As shown,

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

[0056] The release 11 is accommodated in the accommodating chamber; the release 11 is provided with a push rod 111. It should be noted that when a leakage fault occurs in the main circuit, the release 11 is actuated to drive the push rod 111 to move outward. In this embodiment, the push rod 111 moves horizontally to the right to drive 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, so that the operating mechanism 12 moves 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 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 operating mechanism 12 is operated to realize 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 will not directly act on the indicator 14, and the top rod 111 will 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 without interlacing. 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 accommodated in the accommodating cavity. The indicator 14 can be partially accommodated in the accommodating cavity, and the rest of the indicator 14 is located outside the accommodating cavity; or the shell is provided with a window, the window is connected to the accommodating cavity, and the indicator 14 can be observed through the window; the observation effect can also be formed through a transparent window. In this embodiment, the indicator 14 can be a color indication, a symbol indication, a text indication, or a combination of two or more of the above. The indicator 14 is linked with the operating mechanism 12, and here the indicator 14 is linked with one of the components of the operating mechanism 12. The indicator 14 rotates relative to the shell, 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, and the reset elastic member 15 forms an elastic driving effect, so that the reset member 13 moves, forming a reset effect of 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 sleeved on the reset member 13, and the main body 151 can also be accommodated in the reset member 13. The first leg 152 is connected and fixed 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, here the first state is specifically the closing state. In the closing state, there is a gap or abutment between the second leg 153 and the push block 141. The size of the gap can be adjusted according to actual needs, but it is necessary to consider whether the stroke of the push block 141 moving toward the second leg 153 is sufficient to push the top rod 111 to reset. When the second leg 153 abuts against the push block 141, since the second leg 153 has a certain elasticity, a soft connection effect is formed. When the control accuracy is sufficient, the tripping force cannot affect the action of the push block 141. The second state, here the second state means that when the main circuit fails, the release 11 receives the tripping signal, the release 11 is activated, the top rod 111 drives the reset member 13 to rotate, when the reset member 13 rotates, the reset elastic member 15 also moves, the second leg 153 will not directly drive the indicator 14 to move, when the top rod 111 extends to the extreme position, so that 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 area 1531 may just abut 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 activated, and the operating mechanism 12 drives the indicator 14 to rotate, and the push block 141 also rotates accordingly, and the push block 141 is matched with the proximal region 1531, and the push block 141 drives the reset elastic member 15 to move, and the reset elastic member 15 drives the reset member 13 to make the push rod 111 return to the initial position, that is, the proximal region 1531 is located on the rotation track of the push block 141. Equivalently, when the operating mechanism 12 is in the opening position, the indicator 14 indicates opening, and the push rod 111 returns to the initial position. With this structural setting, the push block 141 directly acts on the proximal region 1531, and the action point is close to the main body 151. Compared with the distal region 1532, this action point is not easy to break. Moreover, during the driving process, the first leg 152 is not easy to vibrate, and the driving force can better act on the reset member 13, so that the top rod 111 can be better reset; and during the opening operation, the reset elastic member 15 will not act on the indicator 14, forming a yielding effect. This action point has a stable structure, small torque, small vibration during the movement of the mechanism, and the reset elastic member 15 is not easy to break, 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 bending 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 bending portion 1535 close to the first straight leg 1534 to form a driving effect. The second bending 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, the second straight leg 1536 is located on the side of the imaginary extension line of the first straight leg 1534 close to the first leg 152. The second straight leg 1536 is located on the side close to the first leg 152. When the force is decomposed and acts on the second straight leg 1536, a part of the force moving toward the first leg 152 will also be formed, thereby improving the driving effect. In this embodiment, the second straight leg 1536 is located on the left side of the imaginary extension line of the first straight leg 1534.

[0064] Specifically, the push block 141 is in point contact or surface contact with the proximal region 1531. Here, the push block 141 may be an arcuate surface facing the proximal region 1531, and the arcuate surface cooperates with the proximal region 1531 to form a point contact effect. The push block 141 may also be a straight surface facing the proximal region 1531, and the straight surface cooperates with the proximal region 1531 to form a surface contact. Those skilled in the art can adjust according to actual needs.

[0065] Specifically, the push block 141 is provided with a reinforcing portion 1411. The reinforcing portion 1411 is provided to increase the strength of the push block 141 and ensure that the push block 141 will not break during the pushing process. Here, the push block 141 may 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, and the first positioning shaft 131 is connected to the first connecting plate 132 along the Z axis direction, and the first connecting plate 132 is connected to the second connecting plate 133 along the X axis direction, 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 form a rotation effect. The main body 151 cooperates with the first positioning shaft 131. Here, the main body 151 can be sleeved on the positioning shaft, and the first leg 152 and the second leg 153 extend radially outward; or, the first positioning shaft 131 is provided with a cavity, the main body 151 is accommodated in the cavity, and the first leg 152 and the second leg 153 extend outward through the side wall of the cavity. The first connecting plate 132 is provided with a limiting groove 1321, and the first leg 152 is partially embedded in the limiting groove 1321, and the first leg 152 forms a limiting and fixing effect, and the first leg 152 cannot move at this time. The second connecting plate 133 is provided with a through hole 1331, and the second leg 153 passes through the through hole 1331, and the second leg 153 is movable relative to the through hole 1331, that is, the second leg 153 is movably arranged, and the second leg 153 can move in the through hole 1331, but the side wall of the through hole 1331 will limit the range of movement of the second leg 153. In this embodiment, the distal region 1532 passes through the through hole 1331. The first positioning shaft 131 forms an effect that the reset member 13 rotates relative to the housing, that is, the reset member 13 rotates as a whole about the central axis of the first positioning shaft 131, the first connecting plate 132 and the second connecting plate 133 are vertically connected, and the limiting groove 1321 forms a limiting and fixing effect, so that the first leg 152 is fixed, and the through hole 1331 forms a movable effect of the second leg 153, and when the second leg 153 abuts against the side wall of the through hole 1331, it can also play 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, where the boss 1332 extends in the Y-axis direction, specifically, the boss 1332 is provided on the front side of the second connecting plate 133, and the through hole 1331 is provided on the boss 1332, and the through hole 1331 penetrates the boss 1332 along the Z-axis direction. The setting of the boss 1332 better realizes the cooperation with the second support leg 153. The first connecting plate 132 and the second connecting plate 133 form a T-shaped structure similar to the horizontal setting, and the boss 1332 is located on the front side, and the rear side can be used to drive the transmission shaft to destroy the steady state of the operating mechanism 12.

[0068] Specifically, the first positioning shaft 131 is a step setting, and the reset elastic member 15 is sleeved on the first positioning shaft 131. The step setting realizes the sleeve fixing of the main body 151. Here, the main body 151 of the reset elastic member 15 is sleeved on the first positioning shaft 131, forming a fixing effect of the reset elastic member 15. In addition, the first positioning shaft 131 can also be a cavity structure, and the main body 151 is accommodated in the cavity to form a hidden effect.

[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 reset 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 closing position, the first connecting plate 132 is set vertically downward, at this time 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 the top rod 111 pushes, the entire reset member 13 rotates toward the right with the first positioning axis 131 as the rotation center. After the indicator 14 forms a reset, that is, the opening position, the reset member 13 also returns to the initial position, that is, the first connecting plate 132 is set vertically downward, at this time 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 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 that cooperates with the connecting portion 16. When the indicator 14 is provided with the connecting portion 16, the operating mechanism 12 is provided with the connecting groove 17; conversely, when the indicator 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 14, and the connecting groove 17 is provided on the operating mechanism 12. The indicator 14 cooperates with the operating mechanism 12 to form a cooperation effect of the operating mechanism 12 and the indicator 14. When the operating mechanism 12 is in the closing position, the indicator 14 indicates the closing state; conversely, when the operating mechanism 12 is in the opening position, the indicator 14 indicates the opening state, and the two form a synchronous setting. Here, the component that cooperates with the indicator 14 can be located at the end of the transmission of the operating mechanism 12, or it can be located at the middle position of the operating mechanism 12, but the top rod 111 cannot directly act on the indicator 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 disposed on the movable contact frame 121 .

[0074] Specifically, as attached Fig.10 As shown, the connection part 16 is arranged on the indicator 14, the line connecting the center of the connection part 16 and the rotation center of the indicator 14 is L1, the line connecting the center of the push block 141 and the rotation center of the indicator 14 is L2, and the angle formed by the projection of L1 and L2 is greater than or equal to 90°. The distribution of the connection part 16 and the push block 141 on the indicator 14 forms a layout effect. In the closed state, the connection part 16 is tilted toward the lower right to cooperate with the connection groove 17, and the push block 141 is horizontal to the left, or the push block 141 is tilted toward the upper left. At this time, the reset elastic member 15 is located on the left side of the indicator 14, the second leg 153 is tilted toward the lower right, and the push block 141 is located at the upper right of the first bending portion 1533. There is a gap between the two, and even if the reset member 13 rotates, it will not affect the indicator 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 area 1531 may just abut against the push block 141 (located at the critical point). During the opening operation, the indicator 14 rotates clockwise, so that the push block 141 and the proximal area 1531 abut 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 scheme in this embodiment is based on the existing leakage protector, and the trip reset structure is adjusted with the minimum modification, which increases the service life of the elastic reset member 13, and also increases the life of the entire leakage protector, saving production costs and research and development costs.

[0075] Specifically, the indicator 14 includes a second positioning shaft 142, and the push block 141 is connected to the side wall of the second positioning shaft 142, that is, the push block 141 is located in the radial direction of the second positioning shaft 142, and the connecting portion 16 is connected to the side wall of the second positioning shaft 142 through the connecting rib 143. Here, the push block 141 and the connecting portion 16 are not located on the same plane. The length of the push block 141 and the length of the connecting rib 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. The service life of the reset elastic member 15 is longer. According to the force point analysis, the force of the indicator 14 on the reset elastic member 15 causes the characteristics of the second pin 153 to be subjected to torsion. Therefore, the stress of the reset elastic member 15 is mainly on the spring coil, making the actual service life of the reset elastic member 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. The indicator 14 has less wear. The new structure reduces the force loss transmitted to the reset member 13, so the reset elastic member 15 can be lighter while meeting the condition of the release reset. This makes the indicator 14 bear less force and reduces wear a lot.

[0081] 5. The free range of the ejector rod 111 is large. 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 the purpose of clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived therefrom are still within the scope of protection of the 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 chamber; 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 indicating member (14), the indicating member (14) being accommodated in the accommodating cavity; the indicating member (14) being linked to the operating mechanism (12), the indicating member (14) rotating relative to the housing, and the indicating member (14) being provided with a pushing 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 movement track 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 support leg (152) and a second support leg (153), the first support leg (152) is connected and fixed to the reset member (13), the first support leg (152) and the second support leg (153) are respectively connected to two ends of the main body (151); the second support 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 is provided between the second support leg (153) and the push block (141) or they abut against each other; In the second state, the releaser (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) is abutted 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) so that the push rod (111) returns to its initial position.

2. The tripping and resetting mechanism of the leakage circuit breaker according to claim 1, characterized in that: The second support 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); 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 the proximal region (1531); the remaining part of the second bending portion (1535) and the second straight leg (1536) form the distal region (1532).

3. The tripping and resetting mechanism of the leakage circuit breaker according to claim 2, 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).

4. 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.

5. 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).

6. The tripping and resetting mechanism of the leakage circuit breaker according to claim 1, characterized in that: The reset member (13) comprises 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 supporting leg (152) is partially embedded in the limiting groove (1321); the second connecting plate (133) is provided with a through hole (1331), the second supporting leg (153) passes through the through hole (1331), and the second supporting leg (153) moves relative to the through hole (1331).

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

8. The tripping and resetting mechanism of the leakage circuit breaker according to claim 6, 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).

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

10. The tripping and resetting mechanism of the leakage circuit breaker according to claim 9, characterized in that: The connecting portion (16) is arranged on the indicating member (14), a line connecting the center of the connecting portion (16) and the rotation center of the indicating member (14) is L1, a line connecting the center of the pushing block (141) and the rotation center of the indicating member (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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