Quick closing mechanism for circuit breaker and circuit breaker

Abstract

The invention discloses a quick closing mechanism for a circuit breaker and a circuit breaker, wherein the quick closing mechanism for a circuit breaker comprises a handle and an actuator that are located in a circuit breaker housing and are connected to each other, a moving contact is connected to the actuator, and a static contact is provided on one side of the moving contact, and is characterized in that: the moving contact is rotatably connected to the actuator, a contact spring is connected between the moving contact and the actuator, an energy storage rod is provided on one side of the moving contact, and a lap portion for buckling and connecting the energy storage rod is provided on the moving contact; one end of the energy storage rod forms a trigger portion, the outside of the trigger portion is connected to an energy storage spring, and a squeeze portion is provided on the handle on one side of the trigger portion. The invention can increase the closing speed of the moving contact and reduce the amount of arc release generated during the closing process.

Description

Technical Field

[0001] The invention relates to a circuit breaker, in particular to a quick closing mechanism for a circuit breaker and the circuit breaker. Background Art

[0002] The existing circuit breaker actuator is shown in Patent 201810686547.X, in which the moving contact is connected to the actuator, and the outside of the actuator is connected to the circuit breaker handle via a U-shaped connecting rod; when the circuit breaker is closed, the handle rotates and drives the actuator to perform a closing action via the U-shaped connecting rod, and the moving contact moves synchronously toward the static contact with the closing action of the actuator; when the handle is rotated to the closed state, the moving contact moves accordingly and fits against the static contact to achieve the closing effect.

[0003] However, the defect of this closing action is that a large amount of arc will be generated when the moving contact approaches the static contact, which will cause the contact position to burn and affect the service life of both. Therefore, the moving contact needs to increase its closing speed as much as possible when closing, so as to reduce the amount of arc generated when the moving contact approaches the static contact. However, in the actual operation process, the closing position of the moving contact is directly related to the rotation position of the handle, and is limited by the operator's experience, resulting in the operator not necessarily completing the closing action of the handle quickly, that is, there are situations such as slow closing and shaking the handle causing the moving contact to repeatedly contact the static contact, which will greatly increase the amount of arc released during the closing process of the circuit breaker and reduce the service life of the circuit breaker.

[0004] Therefore, it is necessary to increase the closing speed of the moving contact during the closing process of the circuit breaker. Summary of the invention

[0005] The object of the present invention is to provide a quick closing mechanism for a circuit breaker and a circuit breaker, which can increase the closing speed of a moving contact and reduce the amount of arc release generated during the closing process.

[0006] The technical solution of the present invention is as follows: a quick closing mechanism for a circuit breaker comprises a handle and an actuator which are located in a circuit breaker housing and are connected to each other, a moving contact is connected to the actuator, a static contact is arranged on one side of the moving contact, the moving contact is rotatably connected to the actuator, a contact spring is connected between the moving contact and the actuator, an energy storage rod is arranged on one side of the moving contact, and a lap joint for buckling and connecting the energy storage rod is arranged on the moving contact; a trigger portion is formed at one end of the energy storage rod, an energy storage spring is connected to the outside of the trigger portion, and a pressing portion is arranged on the handle on one side of the trigger portion.

[0007] In the aforementioned quick closing mechanism for circuit breakers, when the handle is in the open state, the overlapping portion and the energy storage rod are separated from each other, the energy storage spring and the trigger portion are attached to each other and drive the energy storage rod to be in a contracted state, and the extrusion portion and the trigger portion are separated from each other;

[0008] When the handle is in the initial rotation closing state, the handle drives the actuator to perform the closing action, and the moving contact moves synchronously with the closing of the actuator, and at the same time, the extrusion part moves toward the triggering part with the rotation closing of the handle;

[0009] When the handle is rotated to the energy storage state, the overlapping part follows the movement of the moving contact and engages with the energy storage rod, and a gap is left between the extrusion part and the trigger part; at this time, the moving contact is limited by the engagement of the energy storage rod and forms a relative rotation with the subsequent closing action of the actuator, and the contact spring is contracted by the relative rotation of the moving contact and the actuator;

[0010] When the handle is rotated to the trigger state, the extrusion part rotates to fit together with the trigger part, and squeezes the trigger part as the handle is subsequently rotated to close the switch. After being squeezed, the trigger part overcomes the elastic force of the energy storage spring and drives the energy storage rod to extend outward, thereby releasing the locking limit on the moving contact; after the limit is released, the moving contact is rapidly rotated toward the static contact due to the elastic force of the contact spring until it is completely in contact with the static contact.

[0011] In the aforementioned quick closing mechanism for circuit breaker, when the handle is opened, the extrusion portion separates from the energy storage rod as the handle opens, and the energy storage spring drives the energy storage rod to retract after rebounding, thereby resetting the energy storage rod.

[0012] In the aforementioned quick closing mechanism for circuit breaker, the energy storage spring is rotatably connected to the handle and one end is buckled and connected to the circuit breaker housing, and the other end of the energy storage spring is buckled with the energy storage rod.

[0013] In the aforementioned quick closing mechanism for circuit breaker, a driving groove is provided on one side of the handle, the trigger portion extends into the driving groove and is buckled and connected to the energy storage spring, the extrusion portion is the end side wall of the driving groove, and the extrusion portion and the energy storage spring are respectively located on both sides of the trigger portion.

[0014] In the aforementioned quick closing mechanism for circuit breaker, the handle and the actuator are connected to each other by a U-shaped connecting rod, and the energy storage spring and the driving groove are both located on the side of the handle away from the U-shaped connecting rod.

[0015] In the aforementioned quick closing mechanism for circuit breaker, a slideway for slidably connecting the energy storage rod is provided on the circuit breaker housing, and the energy storage rod is buckled and connected in the slideway.

[0016] A circuit breaker comprises the aforementioned quick closing mechanism for the circuit breaker.

[0017] Compared with the prior art, the present invention has the following characteristics:

[0018] (1) The present invention uses the structural coordination of the energy storage rod, the energy storage spring and the moving contact to enable the moving contact to enter the energy storage state during the closing process of the handle, that is, to form the contraction of the contact spring; and when the handle is rotated to the trigger state, the energy storage rod releases the limit on the moving contact and enables the moving contact to move quickly and contact the stationary contact under the rebound action of the contact spring; under the above coordination, the moving contact can quickly complete the closing action and will not be restricted by the rotation position of the handle and stay in the arc triggering position, thereby effectively reducing the arc release amount generated during the closing process;

[0019] (2) By optimizing the connection structure and action of the energy storage rod, the present invention can realize the rapid closing function of the moving contact by simply adding an energy storage rod and an energy storage spring to the existing circuit breaker, which effectively reduces the modification of the circuit breaker structure and the occupation of the internal space of the circuit breaker, thereby improving the applicability of the present invention;

[0020] Therefore, the present invention can increase the closing speed of the moving contact and reduce the amount of arc release generated during the closing process. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is an installation diagram of Example 1;

[0022] Figure 2 is a schematic diagram of the structure of Embodiment 1 in the gate-opening state;

[0023] Figure 3 is a schematic diagram of the structure of Example 1 in the energy storage state;

[0024] Figure 4 is a schematic diagram of the structure of Example 1 in the trigger state;

[0025] Figure 5 is a schematic structural diagram of Example 2;

[0026] Figure 6 It is a partial structural diagram of the circuit breaker housing at the position of the air outlet mechanism in Example 2;

[0027] Figure 7 is a diagram of the connection structure of the circuit breaker housing and the arc-blocking member at the air outlet of the arc-extinguishing mechanism in Example 2;

[0028] Figure 8 It is an exploded view of the arc-blocking member at the connection in Example 2.

[0029] The marks in the accompanying drawings are: 1-handle, 2-actuator, 3-moving contact, 4-static contact, 5-contact spring, 6-energy storage rod, 7-energy storage spring, 8-extrusion part, 9-drive groove, 10-U-shaped connecting rod, 11-slide, 12-arc extinguishing mechanism, 13-arc blocking member, 14-wire clamp, 15-air outlet chamber, 16-air guide plate, 17-air guide groove, 18-first partition, 19-first exhaust port, 20-second exhaust port, 21-second partition, 22-arc extinguishing plate, 23-exhaust channel, 301-lap joint, 601-trigger part, 151-first air outlet cavity, 152-second air outlet cavity, 153-third air outlet cavity, 154-fourth air outlet cavity, 161-first air guide plate, 162-second air guide plate. DETAILED DESCRIPTION

[0030] The present invention is further described below in conjunction with the accompanying drawings and embodiments, but they are not intended to limit the present invention.

[0031] Embodiment 1. A quick closing mechanism for a circuit breaker, comprising: Figure 1-4 As shown, it includes a handle 1 and an actuator 2 that are located in a circuit breaker housing and are connected to each other, the handle 1 is connected to a handle spring, the actuator 2 is connected to a moving contact 3, one side of the moving contact 3 is provided with a static contact 4, the moving contact 3 is rotatably connected to the actuator 2, a contact spring 5 is connected between the moving contact 3 and the actuator 2, one side of the moving contact 3 is provided with an energy storage rod 6, and the moving contact 3 is provided with a lap joint 301 for buckling and connecting the energy storage rod 6; the energy storage rod 6 forms a triggering part 601 at one end away from the lap joint 301, the outside of the triggering part 601 is connected to an energy storage spring 7, and a squeezing part 8 is provided on the handle 1 on one side of the triggering part 601, and the elastic force of the energy storage spring 7 is smaller than that of the handle spring.

[0032] When the handle 1 is in the unlocking state, the overlapping portion 301 and the energy storage rod 6 are separated from each other, the energy storage spring 7 and the trigger portion 601 are attached to each other and drive the energy storage rod 6 to be in the contracted state, and the extrusion portion 8 and the trigger portion 601 are separated from each other;

[0033] When the handle 1 is in the initial rotation closing state, the handle 1 drives the actuator 2 to perform the closing action, and the moving contact 3 moves synchronously with the closing of the actuator 2, and at the same time, the extrusion part 8 moves toward the trigger part 601 along with the rotation closing of the handle 1;

[0034] When the handle 1 is rotated to the energy storage state, the overlapping portion 301 follows the movement of the moving contact 3 and engages with the energy storage rod 6, and a gap is left between the extrusion portion 8 and the trigger portion 601; at this time, the moving contact 3 is limited by the engagement of the energy storage rod 6 and forms a relative rotation with the actuator 2 following the subsequent closing action of the actuator 2, and the contact spring 5 forms a contraction with the relative rotation of the moving contact 3 and the actuator 2;

[0035] When the handle 1 is rotated to the trigger state, the squeezing portion 8 rotates to fit together with the trigger portion 601, and squeezes the trigger portion 601 as the handle 1 is subsequently rotated to close the switch. After being squeezed, the trigger portion 601 overcomes the elastic force of the energy storage spring 7 and drives the energy storage rod 6 to extend outward, thereby releasing the locking limit on the moving contact 3; after the limit is released, the moving contact 3 is rapidly rotated toward the static contact 4 by the elastic force of the contact spring 5 until it is completely fitted with the static contact 4.

[0036] When the handle 1 is in the opening action, the squeezing portion 8 separates from the energy storage rod 6 along with the opening action of the handle 1 , and the energy storage spring 7 drives the energy storage rod 6 to retract again after rebounding, thereby completing the resetting of the energy storage rod 6 .

[0037] The energy storage spring 7 is rotatably connected to the handle 1 and one end of the energy storage spring 7 is buckled and connected to the circuit breaker housing, and the other end of the energy storage spring 7 is buckled with the energy storage rod 6 .

[0038] A circular arc-shaped driving groove 9 is provided on one side of the handle 1, and the trigger part 601 extends into the driving groove 9 and is buckled and connected to the energy storage spring 7. The extrusion part 8 is the end side wall of the driving groove 9, and the extrusion part 8 and the energy storage spring 7 are respectively located on the left and right sides of the trigger part 601.

[0039] The handle 1 and the actuator 2 are connected to each other by a U-shaped connecting rod 10 , and the energy storage spring 7 and the driving groove 9 are both located on the side of the handle 1 away from the U-shaped connecting rod 10 .

[0040] The circuit breaker housing is provided with a slideway 11 slidably connected to the energy storage rod 6 , and the energy storage rod 6 is buckled and connected in the slideway 11 . The slideway 11 can limit the energy storage rod 6 so that the energy storage rod 6 can only move laterally in the slideway 11 .

[0041] In this embodiment, the structure of the moving contact 3, the energy storage rod 6, the energy storage spring 7 and the handle is coordinated, so that when the circuit breaker is in the initial closing state, the handle 1 and the actuator 2 can be closed in a conventional manner, and the moving contact 3 moves toward the end of the energy storage rod 6 with the closing action of the actuator 2. When the moving contact 3 rotates with the actuator 2 to interlock with the energy storage rod 6, the moving contact 3 can be limited by the energy storage rod 6 at this time, so that the moving contact 3 cannot continue to move with the actuator 2 under the limiting action, thereby forming a relative rotation with the actuator 2. In this state, a safe interval is formed between the moving contact 3 and the static contact 4, that is, no arc release is formed.

[0042] After the moving contact 3 rotates relative to the actuator 2, it drives the contact spring 5 to contract, and the moving contact 3 enters the energy storage state, and the extrusion part 8 continues to rotate toward the trigger part 601 with the closing action of the handle 1; when the extrusion part 8 rotates to fit with the trigger part 601, the subsequent closing action of the extrusion part 8 will squeeze the trigger part 601, so that the trigger part 601 overcomes the elastic force of the energy storage spring 7 and extends outward after being compressed, that is, the locking limit on the moving contact 3 is released.

[0043] After the limit is released, the moving contact 3 rotates rapidly under the rebound effect of the contact spring 5 until it fits with the static contact 4. Under the above cooperation, the final closing action of the moving contact 3 is driven by the contact spring 5 instead of the handle 1, thereby effectively avoiding the influence of the closing speed of the handle 1 on the action of the moving contact 3, so that the moving contact 3 can complete the closing quickly, thereby reducing the arc release.

[0044] Embodiment 2. A circuit breaker, comprising: Figure 5-8 As shown, the circuit breaker includes the quick closing mechanism for the circuit breaker in embodiment 1;

[0045] An arc extinguishing mechanism 12 is also provided in the middle of the circuit breaker housing, and an air outlet mechanism is provided on one side of the arc extinguishing mechanism 12. An exhaust port is provided on the circuit breaker housing outside the air outlet mechanism. The air outlet mechanism includes an arc-blocking member 13 which is snap-fitted into the circuit breaker housing, and a wire clamp 14 is detachably connected to the middle of the arc-blocking member 13. Two symmetrical air outlet chambers 15 are formed between the side walls of the arc-blocking member 13 and the circuit breaker housings on both sides, and the inner end of the air outlet chamber 15 is communicated with the air outlet of the arc extinguishing mechanism 12, and the outer end of the air outlet chamber 15 is communicated with the exhaust port.

[0046] The arc-blocking member 13 is provided with a plurality of spaced-apart air guide plates 16 at one end close to the arc-extinguishing mechanism 12 , the outer end of the guide portion is in contact with the arc-extinguishing mechanism 12 , and air guide grooves 17 for ventilation are formed between adjacent air guide plates 16 , and part of the arc gas from the arc-extinguishing mechanism 12 enters the air outlet chamber 15 through the air guide grooves 17 after being discharged.

[0047] The air guide plate 16 includes a first air guide plate 161 and a second air guide plate 162 respectively located in the two air outlet chambers 15. The first air guide plate 161 and the second air guide plate 162 are staggered up and down along the height direction of the arc blocking member 13. A plurality of arc extinguishing grids are arranged side by side in the arc extinguishing mechanism 12, and an arc extinguishing channel is formed between adjacent arc extinguishing grids. The first air guide plate 161 and the second air guide plate 162 have the same width and are half of the width of the arc extinguishing channel. The first air guide plate 161 and the second air guide plate 162 partially block the arc extinguishing channel after being attached, and the arc gas in the adjacent arc extinguishing channels enters the two air outlet chambers 15 respectively after being separated by the first air guide plate 161 and the second air guide plate 162.

[0048] The air outlet chamber 15 is provided with a first partition plate 18 with a plurality of matching air guide grooves 17 spaced apart from each other. The outer side of the first partition plate 18 is in contact with the air guide plate 16 , and different air guide grooves 17 in the air outlet chamber 15 are separated from each other by the first partition plate 18 and the air guide plate 16 .

[0049] The exhaust port includes a first exhaust port 19 and a second exhaust port 20 respectively arranged on the circuit breaker housing, and the first exhaust port 19 and the second exhaust port 20 are respectively located at the upper and lower sides of the circuit breaker housing, and the air outlet chamber 15 includes a first air outlet cavity 151, a second air outlet cavity 152, a third air outlet cavity 153 and a fourth air outlet cavity 154 which are separated from each other, and the first air outlet cavity 151, the second air outlet cavity 152, the third air outlet cavity 153 and the fourth air outlet cavity 154 completely cover the air outlet of the arc extinguishing mechanism 12 along the height direction, and one side of the first air outlet cavity 151, the second air outlet cavity 152, the third air outlet cavity 153 and the fourth air outlet cavity 154 are respectively connected to part of the air outlet of the arc extinguishing mechanism 12, and the outside of the first air outlet cavity 151 and the second air outlet cavity 152 is connected to the first exhaust port 19, and the outside of the third air outlet cavity 153 and the fourth air outlet cavity 154 is connected to the second exhaust port 20.

[0050] The air outlet chamber 15 is provided with a second partition plate 21 connected to the circuit breaker housing. A second air outlet cavity 152 and a third air outlet cavity 153 are formed on both sides of the second partition plate 21. The second air outlet cavity 152 and the third air outlet cavity 153 are separated from each other by the second partition plate 21 and are not ventilated to each other.

[0051] The first air outlet cavity 151 and the second air outlet cavity 152 are separated from each other by the arc blocking member 13 and the circuit breaker housing at one end close to the arc extinguishing mechanism 12, and the other ends of the first air outlet cavity 151 and the second air outlet cavity 152 are connected to each other. The first exhaust port 19 is located at the end of the first air outlet cavity 151, and the arc gas in the second air outlet cavity 152 is discharged outward by passing through the first air outlet cavity 151 and the first exhaust port 19 in sequence.

[0052] An arc extinguishing plate 22 detachably connected to the circuit breaker housing is disposed in the first air outlet cavity 151 inside the first air outlet 19 . Arc gas in the first air outlet cavity 151 and the second air outlet cavity 152 passes through the arc extinguishing plate 22 and is discharged to the outside during exhaust.

[0053] An exhaust channel 23 is formed on the inner side of the second exhaust port 20, and the third air outlet cavity 153 and the fourth air outlet cavity 154 are separated from each other by the arc blocking member 13 and the circuit breaker housing at one end close to the arc extinguishing mechanism 12, and the other ends of the third air outlet cavity 153 and the fourth air outlet cavity 154 are connected to the exhaust channel 23 at the same time.

[0054] The end of the wire clamp 14 extends to the outside of the arc blocking member 13 and is located in the exhaust channel 23 , and the arc gas in the third gas outlet cavity 153 and the fourth gas outlet cavity 154 passes through the wire clamp 14 and enters the second exhaust port 20 .

[0055] Compared with the first embodiment, the present embodiment further optimizes the gas outlet mechanism of the circuit breaker; after the arc gas in the arc extinguishing mechanism 12 is exhausted, the arc gas in different arc extinguishing channels enters the first gas outlet cavity 151, the second gas outlet cavity 152, the third gas outlet cavity 153 and the fourth gas outlet cavity 154 of the gas outlet chambers 15 on both sides respectively under the guidance of the gas guide groove 17 and the outer wall of the arc blocking member 13. The arc gas in the first gas outlet cavity 151 flows directly toward the first exhaust port 19; the arc gas in the second gas outlet cavity 152 first converges at the rear end of the second gas outlet cavity 152, and then flows along the gap between the arc blocking member 13 and the circuit breaker housing to the first gas outlet cavity 151 at the front end of the arc extinguishing plate 22, and is discharged outward through the arc extinguishing plate 22 and the first exhaust port 19 together with the arc gas in the first gas outlet cavity 151. The arc extinguishing plate 22 can extinguish the arc gas in the first gas outlet cavity 151 and the second gas outlet cavity 152, thereby improving the safety of the arc gas when it is discharged.

[0056] The arc gas in the third gas outlet cavity 153 and the fourth gas outlet cavity 154 flows toward the exhaust channel 23 respectively, and after being gathered at the exhaust channel 23, passes through the wire clamp 14 and the second exhaust port 20 to be discharged outward. The wire clamp 14 can adsorb and cool the electrons in the arc gas when the arc gas passes through, thereby improving the safety of the arc gas when it is discharged.

[0057] With the above cooperation, the arc gas of this embodiment can be cut into eight parts after being discharged by the arc extinguishing mechanism 12, and enter the respective outlet cavities of the two outlet chambers 15 respectively, thereby effectively prolonging the convergence time of the arc gas in different outlet cavities and improving the arc extinguishing effect of cutting the arc gas. On this basis, through the setting of the first exhaust port 19 and the second exhaust port 20, the arc gas on the upper and lower sides of the arc extinguishing mechanism 12 can be separated from each other through the separation of the circuit breaker housing and the arc extinguishing mechanism 12 after being discharged, and discharged outward from the upper and lower sides of the circuit breaker respectively, thereby achieving complete separation of the two parts of arc gas during the exhaust process, and effectively preventing the two parts of arc gas with relatively large potential difference from converging to form discharge.

[0058] At the same time, through the air outlet chamber 15 formed between the arc-blocking member 13 and the circuit breaker housing on both sides, it is also possible to effectively utilize the remaining space between the wire clamp 14 and the circuit breaker housing in the original circuit breaker, and thereby reduce the space occupied by the air outlet mechanism in the length direction of the circuit breaker, thereby effectively improving its air outlet effect and reducing the overall size of the circuit breaker compared to the existing air outlet structure of the circuit breaker.

Claims

1. A quick closing mechanism for a circuit breaker, comprising a handle (1) and an actuator (2) located in a circuit breaker housing and connected to each other, a moving contact (3) connected to the actuator (2), a stationary contact (4) provided on one side of the moving contact (3), characterized in that: The invention comprises a moving contact (3) rotatably connected to an actuator (2), a contact spring (5) being connected between the moving contact (3) and the actuator (2), an energy storage rod (6) being provided on one side of the moving contact (3), and a lap joint (301) being provided on the moving contact (3) for buckling and connecting with the energy storage rod (6); a triggering part (601) being formed at one end of the energy storage rod (6), an energy storage spring (7) being connected to the outside of the triggering part (601), and a squeezing part (8) being provided on a handle (1) on one side of the triggering part (601); When the handle (1) is in an open state, the overlapping portion (301) and the energy storage rod (6) are separated from each other, the energy storage spring (7) and the trigger portion (601) are in contact with each other and drive the energy storage rod (6) to be in a contracted state, and the extrusion portion (8) and the trigger portion (601) are separated from each other; When the handle (1) is in the initial rotation closing state, the handle (1) drives the actuator (2) to perform a closing action, and the moving contact (3) moves synchronously with the closing of the actuator (2), and at the same time, the extrusion part (8) moves toward the trigger part (601) as the handle (1) rotates and closes; When the handle (1) is rotated to the energy storage state, the overlapping portion (301) follows the movement of the moving contact (3) and engages with the energy storage rod (6), and a gap is left between the extrusion portion (8) and the trigger portion (601); at this time, the moving contact (3) is limited by the engagement of the energy storage rod (6) and forms a relative rotation with the actuator (2) following the subsequent closing action of the actuator (2), and the contact spring (5) follows the relative rotation of the moving contact (3) and the actuator (2) to form a contraction; When the handle (1) is rotated to the trigger state, the squeezing portion (8) rotates to fit with the trigger portion (601), and squeezes the trigger portion (601) as the handle (1) rotates to close the switch. After being squeezed, the trigger portion (601) overcomes the elastic force of the energy storage spring (7) and drives the energy storage rod (6) to extend outward, thereby releasing the locking limit of the moving contact (3); after the limit is released, the moving contact (3) is quickly rotated toward the static contact (4) by the elastic force of the contact spring (5) until it is completely in contact with the static contact (4); When the handle (1) performs an opening action, the squeezing portion (8) separates from the energy storage rod (6) as the handle (1) performs the opening action, and the energy storage spring (7) drives the energy storage rod (6) to retract again after rebounding, thereby completing the resetting of the energy storage rod (6).

2. The quick closing mechanism for circuit breaker according to claim 1, characterized in that: The energy storage spring (7) is rotatably connected to the handle (1) and one end of the energy storage spring (7) is buckled and connected to the circuit breaker housing, and the other end of the energy storage spring (7) is buckled with the energy storage rod (6).

3. The quick closing mechanism for circuit breaker according to claim 2, characterized in that: A driving groove (9) is provided on one side of the handle (1); the trigger portion (601) extends into the driving groove (9) and is buckled and connected to the energy storage spring (7); the extrusion portion (8) is an end side wall of the driving groove (9); and the extrusion portion (8) and the energy storage spring (7) are respectively located on two sides of the trigger portion (601).

4. The quick closing mechanism for circuit breaker according to claim 3, characterized in that: The handle (1) and the actuator (2) are connected to each other via a U-shaped connecting rod (10), and the energy storage spring (7) and the driving groove (9) are both located on a side of the handle (1) away from the U-shaped connecting rod (10).

5. The quick closing mechanism for circuit breaker according to claim 1, characterized in that: The circuit breaker housing is provided with a slideway (11) slidably connected to the energy storage rod (6), and the energy storage rod (6) is buckled and connected in the slideway (11).

6. A circuit breaker, characterized in that: The circuit breaker comprises the quick closing mechanism for the circuit breaker according to any one of claims 1-5.

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