A circuit breaker mechanism

Abstract

The present invention relates to a circuit breaker mechanism, which includes a housing and a handle, a lock catch, a connecting rod, an interlocking member, a main rotating shaft, a pushing member and a reset torsion spring arranged inside the housing. The lock catch and the connecting rod are rotatably arranged on the main rotating shaft. The driven hole communicates with the sliding groove. One end of the interlocking member is linked with the handle, and the other end is set as a driven end and arranged in the driven hole. A moving contact is arranged on the connecting rod, and a static contact is arranged inside the housing. The handle drives the lock catch and the connecting rod to rotate through the interlocking member. The reset torsion spring is arranged on the main rotating shaft. The pushing member has a tripping position for driving the lock catch and the connecting rod to separate and enabling the driven end to move into the sliding groove, and includes an anti-slip catch torsion spring. The anti-slip catch torsion spring is arranged on the handle and has a driving end for driving the lock catch and the connecting rod to move towards the closed position. The lock catch is provided with a first contact end and a second contact end, and the distance between the first contact end and the main rotating shaft is greater than the distance between the second contact end and the main rotating shaft. The purpose of the present invention is to provide a circuit breaker mechanism that is not prone to slipping of the catch.

Description

Technical Field

[0001] The present invention relates to a circuit breaker, and more particularly to a circuit breaker mechanism. Background Art

[0002] A circuit breaker refers to a switching device that can close, carry, and break the current under normal circuit conditions and can also close, carry, and break the current under abnormal circuit conditions within a specified time. Circuit breakers can be used to distribute electrical energy, start asynchronous motors infrequently, and protect power supply lines and motors, etc. When they encounter serious overload, short circuit, undervoltage, and other faults, they can automatically cut off the circuit, and their functions are equivalent to the combination of a fuse switch and an over- and under-thermal relay, etc.

[0003] Existing circuit breakers include a housing and a handle, a lock, a connecting rod, an interlock, a main rotating shaft, a pushing member, and a return torsion spring disposed within the housing. The lock and the connecting rod are rotatably arranged on the main rotating shaft and form a driven hole and a sliding groove, which are connected to each other. One end of the interlock is linked with the handle, and the other end is disposed as a driven end within the driven hole. A moving contact is provided on the connecting rod, and a static contact is provided within the housing. The handle drives the lock and the connecting rod to rotate through the interlock, so that the lock and the connecting rod have a closed position and an open position. The closed position is where the moving contact contacts the static contact, and the open position is where the moving contact is separated from the static contact. The return torsion spring is disposed on the main rotating shaft and has a force to drive the lock and the connecting rod to move to the open position. The pushing member has a tripping position that drives the lock and the connecting rod to separate and causes the driven end to move into the sliding groove.

[0004] At present, in order to ensure that the user can smoothly drive the latch and the connecting rod from the disconnected position to the closed position through the handle, an additional driving torsion spring is often added, so as to provide an additional driving force during the rotation of the handle to drive the rotation of the latch and the connecting rod. And a limiting protrusion is provided on the outer shell, so that when the latch and the connecting rod have not reached the closed position, the driving torsion spring abuts against the limiting protrusion, so as to be separated from the latch and the connecting rod. During the rotation of the latch and the connecting rod from the disconnected position to the closed position, the driving torsion spring abuts against the limiting protrusion, so that the driving torsion spring no longer drives the latch and the connecting rod to rotate to the closed position. However, during the closing process of the circuit breaker, the driving torsion spring is separated from the latch and the connecting rod, and only relies on the friction force between the driven end and the connecting rod and the latch. But there is a risk of slipping during the rapid rotation of the latch and the connecting rod from the disconnected position to the closed position, that is, the acting force provided by the reset torsion spring is greater than the friction force, so that the driven end of the interlocking member moves from the driven hole to the sliding groove, so that the interlocking member no longer provides a driving force for the latch and the connecting rod. Then, under the drive of the reset spring, it moves back to the disconnected position again, resulting in the failure of closing and bringing installation hidden dangers. And for another type of circuit breaker, if the limiting protrusion is not provided, that is, the driving torsion spring always provides the acting force for the latch and the connecting rod to move to the closed position, it will be difficult to drive the latch and the connecting rod to move to the disconnected position when the pushing member reaches the cutting position, bringing greater danger. Summary of the Invention

[0005] Aiming at the deficiencies of the prior art, the purpose of the present invention is to provide a circuit breaker mechanism that is not prone to slipping.

[0006] To achieve the above purpose, the present invention provides the following technical solutions: including a housing and a handle, a latch, a connecting rod, an interlocking member, a main rotating shaft, a pushing member and a reset torsion spring arranged in the housing. The latch and the connecting rod are rotatably arranged on the main rotating shaft and form a driven hole and a sliding groove. The driven hole and the sliding groove are connected to each other. One end of the interlocking member is linked with the handle, and the other end is used as a driven end and arranged in the driven hole. A moving contact is arranged on the connecting rod, and a static contact is arranged in the housing. The handle drives the latch and the connecting rod to rotate through the interlocking member, so that the latch and the connecting rod have a closed position and a disconnected position. The closed position is that the moving contact contacts the static contact, and the disconnected position is that the moving contact is separated from the static contact. The reset torsion spring is arranged on the main rotating shaft and has an acting force to drive the latch and the connecting rod to move to the disconnected position. The pushing member has a tripping position to drive the latch and the connecting rod to separate and make the driven end move into the sliding groove. It includes an anti-slipping torsion spring. The anti-slipping torsion spring is arranged on the handle and has a driving end to drive the latch and the connecting rod to move to the closed position. The latch is provided with a first contact end and a second contact end, and the distance between the first contact end and the main rotating shaft is greater than the distance between the second contact end and the main rotating shaft. When the latch and the connecting rod are in the disconnected position, the driving end abuts against the first contact end. When the latch and the connecting rod are in the closed position, the driving end abuts against the second contact end.

[0007] By adopting the above technical solution, when the circuit breaker needs to be closed, the user can push the handle. Then, the handle drives the lock catch and the connecting rod to rotate around the main rotating shaft. The anti-slip catch torsion spring abuts against the first contact end and also applies a driving force to the lock catch and the connecting rod. At this time, the driving force of the handle on the lock catch and the connecting rod plus the driving force of the anti-slip catch torsion spring on the lock catch and the connecting rod is greater than the acting force of the reset torsion spring on the lock catch and the connecting rod. Therefore, the lock catch and the connecting rod move from the open position to the closed position until the lock catch and the connecting rod move to the closed position. At this time, the anti-slip catch torsion spring abuts against the second contact end. And because the distance between the second contact end and the main rotating shaft is less than the distance between the first contact end and the main rotating shaft, the force arm of the anti-slip catch torsion spring on the lock catch and the connecting rod decreases, so the driving force on the lock catch and the connecting rod decreases. At this time, the lock catch and the connecting rod are subjected to the driving forces of the handle and the anti-slip catch torsion spring and the acting force of the reset torsion spring, reaching a balanced state, and the static contact abuts against the moving contact. When a short circuit occurs, the pushing member acts on the lock catch and the connecting rod, and the driven end moves from the driven hole to the sliding groove. At this time, the driven end can no longer apply a driving force to the lock catch and the connecting rod, and the acting force of the reset torsion spring is greater than the driving force of the anti-slip catch torsion spring. The lock catch and the connecting rod move to the open position, and the static contact and the moving contact are separated. Compared with the two types of circuit breakers mentioned in the background art, an additional driving force of the anti-slip catch torsion spring is added in the present invention, so that the anti-slip catch torsion spring drives the lock catch to move towards the connecting rod, thereby making the contact between the lock catch and the connecting rod and the driving end in the driven hole closer, avoiding the occurrence of the slipping catch phenomenon. At the same time, compared with the lock catch and the connecting rod in the open position, the lock catch and the connecting rod in the closed position are subjected to a smaller driving force by the anti-slip catch torsion spring, which will not affect the action of the pushing member on the lock catch and the connecting rod. Therefore, it not only satisfies the requirement of providing a large driving force for the lock catch and the connecting rod at the starting end of the handle rotation, but also provides a small driving force when the lock catch and the connecting rod are in the closed position, not only avoiding the generation of the slipping catch, but also not affecting the action of the pushing member.

[0008] The present invention is further configured as follows: a handle rotating shaft is arranged inside the housing, the handle is rotatably arranged on the handle rotating shaft, and the handle has an operating rod located outside the housing.

[0009] By adopting the above technical solution, the user can drive the rotation of the connecting rod and the lock catch by driving the handle to rotate along the handle rotating shaft through the operating rod.

[0010] The present invention is further configured as follows: the linkage member is U-shaped, with the two ends of the linkage member being the active end and the driven end respectively. An active groove adapted to the size of the active end is provided on the handle. The active end is rotatably arranged in the active groove to form a linkage between the handle and the linkage member. The lock catch extends towards the pushing member to be provided with a mating plate. The lock catch and the connecting rod have a mating state and a separated state. The mating state is that the lock catch and the connecting rod form a driven hole, and the driven end is located in the driven hole and has a force applied to move the lock catch and the connecting rod towards the closed position. The separated state is that the pushing member contacts the mating plate, the driven hole formed by the lock catch and the connecting rod deforms, the driven end is located in the sliding groove, and the driven end no longer applies a force to move the lock catch and the connecting rod towards the closed position.

[0011] By adopting the above technical solution, when the handle rotates, it drives the rotation of the active end, thereby driving the movement of the driven end. And since the driven end is located in the driven hole, it drives the connecting rod and the lock catch to rotate towards the closed position simultaneously. When a short circuit occurs, the pushing member acts on the mating plate, causing relative movement between the connecting rod and the lock catch. At this time, the driven hole expands, and the driven end moves out of the driven hole to the sliding groove. At this time, the driving force of the driven end on the connecting rod and the lock catch is greatly reduced. Therefore, under the action of the return torsion spring, the connecting rod and the lock catch move towards the open position, so that the moving contact and the static contact are separated, achieving the effect of opening the circuit.

[0012] The present invention is further configured as follows: the connecting rod and the lock catch are made of plastic.

[0013] By adopting the above technical solution, using plastic material for the connecting rod increases the force-bearing area with the U-shaped connecting rod, thereby reducing the wear of the driven end on the connecting rod.

[0014] The present invention is further configured as follows: the connecting rod is green and the lock catch is red.

[0015] By adopting the above technical solution, using different colors for the connecting rod and the lock catch facilitates the identification of the interior of the circuit breaker. And since the connecting rod and the lock hole are made of plastic, no additional pad printing operation is required. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a schematic structural diagram of the whole of the present invention;

[0017] Figure 2 is a schematic diagram of the handle, connecting rod, lock catch and related components of the present invention in the open position;

[0018] Figure 3 is a schematic diagram of the handle, connecting rod, lock catch and related components of the present invention in the closed position;

[0019] Figure 4 is an exploded view of the handle, connecting rod, lock catch and related components of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0020] The technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0021] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings. It is 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 thus should not be construed as a limitation of the present invention. In addition, the terms "first", "second", and "third" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0022] Such as Figures 1-4As shown in the figure, the present invention discloses a circuit breaker mechanism, which includes a housing 1, a handle 2, a latch 31, a connecting rod 32, an interlocking member 9, a main rotating shaft 4, a pushing member 5 and a return torsion spring 6 arranged inside the housing 1. The latch 31 and the connecting rod 32 are rotatably arranged on the main rotating shaft 4 and form a driven hole 33 and a sliding groove 34. The driven hole 33 and the sliding groove 34 are connected to each other. One end of the interlocking member 9 is linked with the handle 2, and the other end is set as a driven end 92 and arranged inside the driven hole 33. A moving contact 71 is arranged on the connecting rod 32, and a static contact 72 is arranged inside the housing 1. The handle 2 drives the latch 31 and the connecting rod 32 to rotate through the interlocking member 9, so that the latch 31 and the connecting rod 32 have a closed position and an open position. The closed position is when the moving contact 71 contacts the static contact 72, and the open position is when the moving contact 71 is separated from the static contact 72. The return torsion spring 6 is arranged on the main rotating shaft 4 and has a force to drive the latch 31 and the connecting rod 32 to move to the open position. The pushing member 5 has a tripping position to drive the latch 31 and the connecting rod 32 to separate and make the driven end 92 move into the sliding groove 34, including an anti-slip buckle torsion spring 8. The anti-slip buckle torsion spring 8 is arranged on the handle 2 and has a driving end 81 to drive the latch 31 and the connecting rod 32 to move to the closed position. A first contact end 311 and a second contact end 312 are arranged on the latch 31, and the distance between the first contact end 311 and the main rotating shaft 4 is greater than the distance between the second contact end 312 and the main rotating shaft 4. When the latch 31 and the connecting rod 32 are in the open position, the driving end 81 abuts against the first contact end 311. When the latch 31 and the connecting rod 32 are in the closed position, the driving end 81 abuts against the second contact end 312. When the circuit breaker needs to be closed, the user can push the handle 2, and then the handle 2 drives the latch 31 and the connecting rod 32 to rotate around the main rotating shaft 4. The anti-slip buckle torsion spring 8 abuts against the first contact end 311 and also applies a driving force to the latch 31 and the connecting rod 32. At this time, the driving force of the handle 2 on the latch 31 and the connecting rod 32 plus the driving force of the anti-slip buckle torsion spring 8 on the latch 31 and the connecting rod 32 is greater than the acting force of the return torsion spring 6 on the latch 31 and the connecting rod 32. Therefore, the latch 31 and the connecting rod 32 move from the open position to the closed position until the latch 31 and the connecting rod 32 move to the closed position. At this time, the anti-slip buckle torsion spring 8 abuts against the second contact end 312, and since the distance between the second contact end 312 and the main rotating shaft 4 is less than the distance between the first contact end 311 and the main rotating shaft 4, the force arm of the anti-slip buckle torsion spring 8 on the latch 31 and the connecting rod 32 decreases, so the driving force on the latch 31 and the connecting rod 32 decreases. At this time, the latch 31 and the connecting rod 32 are subjected to the driving forces of the handle 2, the anti-slip buckle torsion spring 8 and the acting force of the return torsion spring 6, and reach a balanced state. The static contact 72 abuts against the moving contact 71. When a short circuit occurs, the pushing member 5 acts on the latch 31 and the connecting rod 32, and the driven end 92 moves from the driven hole 33 into the sliding groove 34. At this time, the driven end 92 will no longer be able to apply a driving force to the latch 31 and the connecting rod 32. The acting force of the return torsion spring 6 is greater than the driving force of the anti-slip buckle torsion spring 8. The latch 31 and the connecting rod 32 move to the open position, and the static contact 72 is separated from the moving contact 71.Compared with the two circuit breakers mentioned in the background art, the present invention increases the driving force of an anti-slip buckle torsion spring 8, such that the anti-slip buckle torsion spring 8 drives the latch 31 to move towards the connecting rod 32, thereby making the contact between the latch 31 and the connecting rod 32 with the driving end 81 of the driven hole 33 closer, avoiding the occurrence of the slipping buckle phenomenon. At the same time, compared with the latch 31 and the connecting rod 32 in the open position, the latch 31 and the connecting rod 32 in the closed position are subjected to a smaller driving force, which will not affect the action of the pushing member 5 on the latch 31 and the connecting rod 32. Therefore, it not only satisfies the requirement of providing a larger driving force for the latch 31 and the connecting rod 32 at the starting end of the rotation of the handle 2, but also provides a smaller driving force when the latch 31 and the connecting rod 32 are in the closed position, not only avoiding the generation of the slipping buckle, but also not affecting the action of the pushing member 5.

[0023] A handle rotating shaft 21 is provided inside the housing 1, the handle 2 is rotatably arranged on the handle rotating shaft 21, the handle 2 has an operating rod 22 outside the housing 1, and the user can drive the handle 2 to rotate along the rotation of the handle 2 through the operating rod 22, thereby driving the rotation of the connecting rod and the latch.

[0024] The interlocking member 9 is U-shaped, the two ends of the interlocking member 9 are respectively a driving end 91 and a driven end 92, a driving slot 35 adapted to the size of the driving end 91 is provided on the handle 2, the driving end 91 is rotatably arranged in the driving slot 35 and constitutes the linkage between the handle 2 and the interlocking member 9. The latch 31 extends towards the pushing member 5 with a mating plate 36, and the latch 31 and the connecting rod 32 have a mating state and a separated state. The mating state is that the latch 31 and the connecting rod 32 form a driven hole 33, the driven end 92 is located in the driven hole 33 and has an acting force applied to the latch 31 and the connecting rod 32 to move towards the closed position. The separated state is that the pushing member 5 is in contact with the mating plate 36, the driven hole 33 formed by the latch 31 and the connecting rod 32 deforms, the driven end 92 is located in the sliding slot 34, and the driven end 92 no longer applies an acting force to the latch 31 and the connecting rod 32 to move towards the closed position. When the handle 2 rotates, it drives the driving end 91 to rotate, thereby driving the movement of the driven end 92, and the driven end 92 is located in the driven hole 33, so it drives the connecting rod 32 and the latch 31 to rotate towards the closed position at the same time. When a short circuit occurs, the pushing member 5 acts on the mating plate 36, causing the connecting rod 32 and the latch 31 to move relatively. At this time, the driven hole 33 expands, and the driven end 92 moves out of the driven hole 33 into the sliding slot 34. At this time, the driving force of the driven end 92 on the connecting rod 32 and the latch 31 is greatly reduced. Therefore, under the action of the return torsion spring 6, the connecting rod 32 and the latch 31 move towards the open position, thereby separating the moving contact 71 from the static contact 72, achieving the effect of opening the circuit.

[0025] The materials of the connecting rod 32 and the latch 31 are plastic. Using plastic material for the connecting rod 32 increases the force-bearing area with the U-shaped connecting rod 32, thereby reducing the wear of the driven end 92 on the connecting rod 32.

[0026] The connecting rod 32 is colored green, and the lock 31 is colored red. Using different colors for the connecting rod 32 and the lock 31 facilitates the identification of the interior of the circuit breaker. Moreover, the connecting rod 32 and the lock hole are made of plastic, eliminating the need for additional pad printing operations.

Claims

1. A circuit breaker mechanism, comprising a housing and a handle, a latch, a connecting rod, an interlock, a main rotating shaft, a pushing member and a return torsion spring disposed within the housing. The latch and the connecting rod are rotatably disposed on the main rotating shaft and form a driven hole and a sliding groove. The driven hole communicates with the sliding groove. One end of the interlock is linked with the handle, and the other end is disposed as a driven end within the driven hole. A moving contact is provided on the connecting rod, and a stationary contact is provided within the housing. The handle drives the latch and the connecting rod to rotate through the interlock, so that the latch and the connecting rod have a closed position and an open position. The closed position is where the moving contact contacts the stationary contact, and the open position is where the moving contact is separated from the stationary contact. The return torsion spring is disposed on the main rotating shaft and has a force for driving the latch and the connecting rod to move towards the open position. The pushing member has a tripping position for driving the latch and the connecting rod to separate and causing the driven end to move into the sliding groove. Characterized in that: It includes an anti-slip buckle torsion spring. The anti-slip buckle torsion spring is disposed on the handle and has a driving end for driving the latch and the connecting rod to move towards the closed position. The latch is provided with a first contact end and a second contact end, and the distance between the first contact end and the main rotating shaft is greater than the distance between the second contact end and the main rotating shaft. When the latch and the connecting rod are in the open position, the driving end abuts against the first contact end. When the latch and the connecting rod are in the closed position, the driving end abuts against the second contact end.

2. A circuit breaker mechanism according to claim 1, Characterized in that: A handle rotating shaft is provided within the housing. The handle is rotatably disposed on the handle rotating shaft, and the handle has an operating rod located outside the housing.

3. A circuit breaker mechanism according to claim 2, Characterized in that: The interlock is U-shaped. The two ends of the interlock are respectively a driving end and a driven end. A driving slot adapted to the size of the driving end is provided on the handle. The driving end is rotatably disposed in the driving slot and constitutes the linkage between the handle and the interlock.

4. A circuit breaker mechanism according to claim 3, Characterized in that: The latch extends towards the pushing member and is provided with a mating plate. The latch and the connecting rod have a mating state and a separated state. The mating state is that the latch and the connecting rod form a driven hole, the driven end is located in the driven hole and has a force for applying to the latch and the connecting rod to move towards the closed position. The separated state is that the pushing member contacts the mating plate, the driven hole formed by the latch and the connecting rod deforms, the driven end is located in the sliding groove, and the driven end no longer applies a force to the latch and the connecting rod to move towards the closed position.

5. A circuit breaker mechanism according to claim 3, Characterized in that: The connecting rod and the latch are made of plastic.

6. A circuit breaker mechanism according to claim 5, Characterized in that: The connecting rod is green and the latch is red.

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