JP7446205B2 - circuit breaker - Google Patents

Description

The present disclosure relates to a circuit breaker including a movable element holder that rotatably holds a plurality of movable conductors arranged in parallel.

Conventionally, in order to suppress heat generation during energization and allow current to flow stably, circuit breakers have a movable element holder that rotatably holds multiple movable conductors that make up the movable element in each phase in a parallel arrangement. It has been known. For example, Patent Document 1 discloses a circuit breaker in which six movable conductors are arranged in parallel in each phase and rotatably held in a movable element holder.

Japanese Unexamined Patent Publication No. 63-114009

However, in the conventional circuit breaker described above, multiple movable conductors collide with the movable element holder simultaneously during the opening operation that moves the circuit breaker from the closed state to the open state. occurs in Such vibrations are transmitted from the movable element holder to the casing of the circuit breaker, causing the casing to vibrate. Vibration of the housing may cause malfunction or damage to circuit breaker components.

The present disclosure has been made in view of the above, and an object of the present disclosure is to obtain a circuit breaker capable of reducing vibration of a housing caused by collision of a movable element including a plurality of movable conductors with a movable element holder. .

In order to solve the above-mentioned problems and achieve the objective, a circuit breaker of the present disclosure includes a movable element and a movable element holder. The movable element includes a plurality of movable conductors. The movable element holder rotatably holds a plurality of movable conductors arranged in parallel, and has a plurality of collision surfaces that collide with corresponding movable conductors among the plurality of movable conductors that rotate with the opening operation. At least part of the timing at which each of the plurality of movable conductors collides with a corresponding one of the plurality of collision surfaces differs.

According to the present disclosure, it is possible to reduce vibration of the casing due to collision of a movable element including a plurality of movable conductors with a movable element holder.

A side view of the inside of the circuit breaker according to the first embodiment when it is closed. A side view of the inside of the circuit breaker according to the first embodiment when it is opened. A diagram showing an example of the configuration of a movable element and a movable element holder according to Embodiment 1. A front view showing an example of the configuration of the movable element holder according to the first embodiment. A plan view showing an example of the configuration of a movable element holder according to Embodiment 1. A cross-sectional view showing how the movable conductor collides with the collision surface of the movable element holder due to rotation of the movable conductor according to the first embodiment. A plan view showing another example of the configuration of the movable element holder according to the first embodiment. A plan view showing still another example of the configuration of the movable element holder according to the first embodiment. A diagram showing an example of the configuration of a movable element and a movable element holder according to Embodiment 2. A plan view showing an example of the configuration of a movable element holder according to Embodiment 2. A cross-sectional view showing how the movable conductor collides with the collision surface of the movable element holder due to rotation of the movable conductor according to the second embodiment. A front view showing a first example of a plurality of movable conductors according to Embodiment 2. A front view showing a second example of a plurality of movable conductors according to Embodiment 2. A front view showing a third example of a plurality of movable conductors according to the second embodiment. A front view showing a fourth example of a plurality of movable conductors according to the second embodiment. A front view showing a fifth example of a plurality of movable conductors according to Embodiment 2. A front view showing a sixth example of a plurality of movable conductors according to Embodiment 2.

Below, a circuit breaker according to an embodiment will be described in detail based on the drawings.

Embodiment 1.
The circuit breaker according to the first embodiment is an air circuit breaker that opens and closes an electrical circuit such as a low-voltage distribution line, and detects at least one of overcurrent and leakage to interrupt the electrical circuit. Note that the circuit breaker according to the first embodiment may be a circuit breaker other than an air circuit breaker. In the following, for convenience of explanation, the Z-axis positive direction is assumed to be upward, and the Z-axis negative direction is assumed to be downward.

FIG. 1 is a side view of the inside of the circuit breaker according to the first embodiment when it is closed. FIG. 2 is a side view of the interior of the circuit breaker according to the first embodiment when it is opened. As shown in FIG. 1, the circuit breaker 1 according to the first embodiment includes a housing 2 formed of an insulating member, a power supply side terminal 3 and a load side terminal 4 attached to the housing 2, respectively. 2, and a flexible conductor 5 having one end connected to the load side terminal 4.

The circuit breaker 1 also includes a movable element 6 whose one end is connected to the other end of the flexible conductor 5, and a movable element holder whose one end is rotatably attached to the casing 2 inside the casing 2. 7, and a contact pressure spring 8 having one end and the other end attached to the other end of the mover holder 7 and the other end of the mover 6. The power supply side terminal 3 is connected to a power supply side conductor (not shown) outside the housing 2, and the load side terminal 4 is connected to a load side conductor (not shown) outside the housing 2. A fixed contact 10 is attached to the power supply side terminal 3 inside the housing 2, and a movable contact 11 is attached to the other end of the movable element 6.

The flexible conductor 5 is a flexible conductor, and electrically connects the load side terminal 4 and the movable element 6. In the circuit breaker 1 in the closed state shown in FIG. 1, the movable contact 11 is in contact with the fixed contact 10, and the power supply side terminal 3 and the load side terminal 4 of the circuit breaker 1 are electrically connected. The movable element holder 7 is rotatably attached to the housing 2 at one end with a holder shaft 12 as the center of rotation, and the movable element 6 is rotatably attached to the middle part by a movable element pin 13.

Further, the circuit breaker 1 includes an electromagnetic actuator 20 disposed inside the housing 2 as a closing actuator of the circuit breaker 1, and a driving force of the electromagnetic actuator 20 is transmitted to the movable element 6 to connect the fixed contact of the movable contact 11. 10 and a transmission mechanism 30 that makes contact with and releases from the device 10. The circuit breaker 1 also includes an opening spring 39 whose one end and the other end are attached to the transmission mechanism 30 and the housing 2, and a tripping mechanism 40 that maintains the closed state and releases the closed state. and a drive circuit 45 that drives the electromagnetic actuator 20.

In the electromagnetic actuator 20, when the excitation coil 21 is energized by the drive circuit 45, the shaft 25 moves upward. The transmission mechanism 30 includes a connecting link 31 whose one end is rotatably connected to the shaft 25 of the electromagnetic actuator 20 by a connecting pin 34, and a main shaft rotatably connected to the other end of the connecting link 31 by a connecting pin 35. 32, and a link 33 rotatably connected to one end of the main shaft 32.

The main shaft 32 is attached to the rotating shaft 36 so as to be rotatable about the rotating shaft 36 whose absolute position is fixed with respect to the housing 2 . The link 33 has one end rotatably connected to one end of the main shaft 32 by a connecting pin 38 , and the other end rotatably connected to one end of the movable element 6 and the intermediate part of the movable element holder 7 by a movable element pin 13 . is attached to.

When the electromagnetic actuator 20 is energized while the circuit breaker 1 is in an open state, the shaft 25 of the electromagnetic actuator 20 moves upward in the driving direction. As the shaft 25 moves upward, the main shaft 32 rotates around the rotating shaft 36, and the movable element 6 moves forward by the transmission mechanism 30, and as shown in FIG. 1, the fixed contact 10 and the movable contact 11 and the circuit breaker 1 is brought into a closed state.

The opening spring 39 has one end and the other end attached to the main shaft 32 and the housing 2, and the main shaft moves in the direction of displacing the transmission mechanism 30 to the opening position by the elastic restoring force of the opening spring 39. Shaft 32 is energized. When the circuit breaker 1 is in the closed state as shown in FIG. The main shaft 32 rotates counterclockwise in FIG. 1 due to the elastic restoring force 39 .

As the main shaft 32 rotates counterclockwise in FIG. 1, the movable element holder 7 rotates counterclockwise in FIG. 1 about the holder shaft 12 via the link 33. Due to the rotation of the movable element holder 7, the movable contact 11 provided on the movable element 6 is separated from the fixed contact 10, as shown in FIG. It becomes an open state where it is electrically cut off.

As the circuit breaker 1 moves from the closed state shown in FIG. 1 to the open state shown in FIG. 2, the mover 6 collides with the mover holder 7. It is configured such that at least part of the timings at which the plurality of movable conductors collide with the movable element holder 7 are different. Therefore, the collisions of the plurality of movable conductors against the movable element holder 7 can be dispersed, and the vibration of the housing 2 due to the collision of the movable element 6 including the plurality of movable conductors against the movable element holder 7 can be reduced.

Hereinafter, the configurations of the movable element 6 and the movable element holder 7 will be specifically explained. FIG. 3 is a diagram showing an example of the configuration of the movable element and the movable element holder according to the first embodiment. As shown in FIG. 3, the movable element 6 has five movable conductors 60 ₁ , 60 ₂ , 60 ₃ , 60 ₄ , 60 ₅ . The movable element holder 7 rotatably holds the movable conductors 60 ₁ , 60 ₂ , 60 ₃ , 60 ₄ , and 60 ₅ arranged in parallel via the movable element pin 13 . A movable contact 11a is attached to each movable conductor 60 ₁ , 60 ₂ , 60 ₃ , 60 ₄ , 60 ₅ . The movable contacts 11a of the movable conductors 60 ₁ , 60 ₂ , 60 ₃ , 60 ₄ , and 60 ₅ constitute the movable contacts 11 shown in FIGS. 1 and 2.

The movable conductors 60 ₁ , 60 ₂ , 60 ₃ , 60 ₄ , 60 ₅ shown in FIG. 3 have the same shape and are made of the same material. In the following, when each of the movable conductors 60 ₁ , 60 ₂ , 60 ₃ , 60 ₄ , and 60 ₅ is shown without being individually distinguished, it may be referred to as a movable conductor 60 . Note that the number of movable conductors 60 is not limited to five, and may be two or more and less than four, or six or more.

FIG. 4 is a front view showing an example of the configuration of the movable element holder according to the first embodiment, and FIG. 5 is a plan view showing an example of the configuration of the movable element holder according to the first embodiment. As shown in FIG. 4, the movable element holder 7 includes a plurality of storage spaces 71 ₁ , in which corresponding movable conductors among the plurality of movable conductors 60 ₁ , 60 ₂ , 60 ₃ , 60 ₄ , and 60 ₅ are arranged, respectively. 71 ₂ , 71 ₃ , 71 ₄ , 71 ₅ .

Further, as shown in FIGS. 4 and 5, the movable element holder 7 includes a plurality of movable conductors 60 ₁ , 60 ₂ , arranged in a plurality of storage spaces 71 ₁ , 71 ₂ , 71 ₃ , 71 ₄ , 71 ₅ , A collision surface that collides with a corresponding movable conductor among the plurality of movable conductors _{60 1} , 60 ₂ , 60 _{3 ,} 60 4 , 60 ₅ when the movable conductors 60 3 , 60 ₄ , 60 ₅ rotate with the opening operation. 72 ₁ , 72 ₂ , 72 ₃ , 72 ₄ , 72 ₅ .

Specifically, the collision surface 72 ₁ collides with the movable conductor 60 ₁ that is arranged in the storage space 71 ₁ and rotates with the opening operation. Similarly, the collision surface 72 ₂ collides with the movable conductor 60 ₂ which is arranged in the storage space 71 ₂ and rotates with the opening operation, and the collision surface 72 ₃ collides with the movable conductor 60 2 which is arranged in the storage space 71 ₃ and rotates with the opening operation. It collides with the movable conductor ₆₀₃ , which rotates with the rotation. Further, the collision surface 72 ₄ collides with the movable conductor 60 ₄ which is arranged in the storage space 71 ₄ and rotates with the opening operation, and the collision surface 72 ₅ collides with the movable conductor 60 4 which is arranged in the storage space 71 ₅ and rotates with the opening operation. It collides with the movable conductor ₆₀₅ , which rotates accordingly.

A contact pressure spring 8 is attached to each movable conductor 60 ₁ , 60 ₂ , 60 ₃ , 60 ₄ , 60 ₅ between the movable contact 11 a that constitutes the movable contact 11 and the guide hole 73 of the movable element holder 7 . It is being The contact pressure spring 8 is a spring for press-contacting the movable contact 11a to the fixed contact 10, and the spring load that each movable conductor 60 ₁ , 60 ₂ , 60 ₃ , 60 ₄ , 60 ₅ receives from the contact pressure spring 8 is the same. It is. In the following, when each of the collision surfaces 72 ₁ , 72 ₂ , 72 ₃ , 72 ₄ , 72 ₅ is shown without being individually distinguished, it may be referred to as a collision surface 72 .

FIG. 6 is a cross-sectional view showing how the movable conductor collides with the collision surface of the movable element holder due to rotation of the movable conductor according to the first embodiment. As shown in FIG. 6, the movable conductor 60 rotates with the opening operation and collides with the collision surface 72, and the rotation of the movable conductor 60 is stopped. When a plurality of movable conductors 60 collide with a plurality of collision surfaces 72 at the same time, the movable element holder 7 vibrates, and this vibration is transmitted to the casing 2 of the circuit breaker 1, causing the casing 2 to vibrate. The vibration of the housing 2 may cause malfunction or damage to the components of the circuit breaker 1.

Therefore, in the circuit breaker 1 according to the first embodiment, the positions of at least some of the plurality of collision surfaces 72 are made different, so that each of the plurality of movable conductors 60 corresponds to one of the plurality of collision surfaces 72. The movable element holder 7 is configured so that at least part of the timing of collision with the collision surface is different. The position of the collision surface 72 is the position in the rotational direction of the movable conductor 60, and can be changed by moving the collision surface 72 in the horizontal or vertical direction in FIG.

In the movable element holder 7 shown in FIG. 5, the position of the collision surface 72 ₃ is different from the position of the collision surfaces 72 ₁ , 72 ₂ , 72 ₄ , 72 ₅ . The collision surface 72 ₃ is placed closer to _the movable conductor 60 ₃ , and in the _state shown in _FIG . ₂ , 72 ₄ , 72 ₅ rotates until they collide with the collision surfaces 72 ₁ , 72 ₂ , 72 ₄ , 72 ₅ .

Therefore, among the movable conductors 60 ₁ , 60 ₂ , 60 ₃ , 60 ₄ , 60 ₅ that rotate with the opening operation, the movable conductor 60 ₃ collides with the collision surface 72 ₃ first, and then the movable conductors 60 ₁ , 60 ₂ , 60 ₄ , 60 ₅ collide with collision surfaces 72 ₁ , 72 ₂ , 72 ₄ , 72 ₅ . Therefore _{, in} the circuit breaker ₁ using _the movable element _{holder 7} shown in FIG _{. 4} , 72 ₄ , and 72 ₅ at the same time, the impact generated on the movable element holder 7 due to the collision of the movable element 6 can be reduced, and the vibration of the housing 2 can be reduced.

The shape of the movable element holder 7 is not limited to the shape described above. FIG. 7 is a plan view showing another example of the configuration of the mover holder according to the first embodiment, and FIG. 8 is a plan view showing still another example of the configuration of the mover holder according to the first embodiment. It is.

In the movable element holder 7 shown in FIG. 7, the position of the collision surface 72 ₃ , the position of the collision surfaces 72 ₂ and 72 ₄ , and the position of the collision surfaces 72 ₁ and 72 ₅ are different. _In the circuit breaker ₁ using _the movable element _{holder 7} shown _in FIG. ₃ , then the movable conductors 60 ₂ , 60 ₄ collide with the collision surfaces 72 ₂ , 72 ₄ , and finally the movable conductors 60 ₁ , 60 ₅ collide with the collision surfaces 72 ₁ , 72 ₅ .

Therefore, in the circuit breaker 1 using the movable element holder 7 shown in FIG. 7, during the opening operation, the movable element holder is damaged due to the collision of the movable element 6, compared to the circuit breaker 1 using the movable element holder 7 shown in FIG. The impact generated on the housing 7 can be further reduced, and the vibration of the housing 2 can be further reduced.

In the movable element holder 7 shown in FIG. 8, the positions of the collision surfaces 72 ₁ , 72 ₂ , 72 ₃ , 72 ₄ , and 72 ₅ are different from each other. _In the circuit breaker ₁ using _the movable element holder _{7 shown in} FIG. ₅ , then the movable conductor 60 ₄ collides with the collision surface 72 ₄ , then the movable conductor 60 ₃ collides with the collision surface 72 ₃ , then the movable conductor 60 ₂ collides with the collision surface 72 ₂ Finally, the movable conductor 60 ₁ collides with the collision surface 72 ₁ .

Therefore, in the circuit breaker 1 using the movable element holder 7 shown in FIG. 8, since the timing at which each movable conductor 60 collides with the collision surface 72 is different from each other, the movable element holder 7 shown in FIG. Compared to the circuit breaker 1 using the structure shown in FIG.

As described above, the circuit breaker 1 according to the first embodiment includes the mover 6 and the mover holder 7. The movable element 6 includes a plurality of movable conductors 60. The movable element holder 7 rotatably holds a plurality of movable conductors 60 arranged in parallel, and has a plurality of collision surfaces that collide with corresponding movable conductors among the plurality of movable conductors 60 that rotate with the opening operation. It has 72. At least a portion of the timing at which each of the plurality of movable conductors 60 collides with a corresponding one of the plurality of collision surfaces 72 differs. Thereby, the circuit breaker 1 can reduce the vibration of the housing 2 caused by the collision of the movable element 6 including the plurality of movable conductors 60 with the movable element holder 7.

Furthermore, the plurality of collision surfaces 72 differ in the positions at which at least some of the collision surfaces collide with the corresponding movable conductor among the plurality of movable conductors 60. As a result, the circuit breaker 1 moves the movable element 6 including the plurality of movable conductors 60 to the movable element holder 7 by changing the position of at least some of the collision surfaces 72 of the movable element holder 7. Vibration of the housing 2 due to collision can be reduced.

Furthermore, the plurality of collision surfaces 72 differ in the positions at which they collide with the corresponding movable conductors among the plurality of movable conductors 60. Thereby, the vibration of the housing 2 caused by the collision of the movable element 6 including the plurality of movable conductors 60 with the movable element holder 7 can be further reduced.

Embodiment 2.
In the circuit breaker according to the first embodiment, the positions of at least some of the collision surfaces of the plurality of collision surfaces in the movable element holder are different, but in the circuit breaker according to the second embodiment, the positions of the collision surfaces of at least some of the plurality of collision surfaces in the movable element holder are different. At least some of the movable conductors have different volumes or densities. In the following, components having the same functions as those in Embodiment 1 are designated by the same reference numerals and explanations are omitted, and the explanation will focus on the differences from circuit breaker 1 according to Embodiment 1.

FIG. 9 is a diagram showing an example of the configuration of a movable element and a movable element holder according to the second embodiment. FIG. 10 is a plan view showing an example of the configuration of the movable element holder according to the second embodiment. As shown in FIG. 9, the movable element 6A according to the second embodiment includes five movable conductors 60A ₁ , 60A ₂ , 60A ₃ , 60A ₄ , and 60A ₅ . The movable element holder 7A rotatably holds the movable conductors 60A ₁ , 60A ₂ , 60A ₃ , 60A ₄ , and 60A ₅ arranged in parallel via the movable element pin 13 .

As shown in FIG. 10, when the plurality of movable conductors 60A ₁ , 60A ₂ , 60A ₃ , 60A ₄ , 60A ₅ rotate with the opening operation, the movable element holder _7A It has collision surfaces 72A ₁ , 72A ₂ , 72A ₃ , 72A ₄ , and 72A ₅ that collide with corresponding movable conductors among movable conductors 2 , 60A ₃ , 60A _{4 ,} and 60A ₅ , respectively.

As shown in FIG. 10, each collision surface 72A ₁ , 72A ₂ , 72A ₃ , 72A ₄ , 72A ₅ collides with the movable conductor 60A ₁ , 60A ₂ , 60A ₃ , 60A ₄ , 60A ₅ at the same position. be. In the following, when each of the movable conductors 60A ₁ , 60A ₂ , 60A ₃ , 60A ₄ , 60A ₅ is shown without being individually distinguished, it may be referred to as the movable conductor 60A, and the collision surfaces 72A ₁ , 72A ₂ , 72A ₃ , 72A ₄ , and 72A ₅ without distinguishing them individually, they may be referred to as collision surfaces 72A. Note that the number of movable conductors 60A and the number of collision surfaces 72A are not limited to five, and may be two or more and less than four, or six or more.

FIG. 11 is a cross-sectional view showing how the movable conductor collides with the collision surface of the movable element holder due to rotation of the movable conductor according to the second embodiment. As shown in FIG. 11, the movable conductor 60A rotates with the opening operation and collides with the collision surface 72A, and the rotation of the movable conductor 60A stops. In the circuit breaker according to the second embodiment, at least some of the movable conductors 60A constituting the movable element 6A have different volumes or densities, and at least some of the movable conductors 60A have different weights or densities. The moments of inertia are different. Therefore, at least part of the timing at which the plurality of movable conductors 60A collides with the movable element holder 7A is different, and vibration of the housing 2 due to the collision of the movable element 6A including the plurality of movable conductors 60A with the movable element holder 7A is reduced. be able to.

First, an example will be described in which at least some of the plurality of movable conductors 60A have different volumes. FIG. 12 is a front view showing a first example of a plurality of movable conductors according to the second embodiment. FIG. 13 is a front view showing a second example of a plurality of movable conductors according to the second embodiment. FIG. 14 is a front view showing a third example of a plurality of movable conductors according to the second embodiment. FIG. 15 is a front view showing a fourth example of a plurality of movable conductors according to the second embodiment.

In the first example shown in FIG. 12, the lengths of the movable conductors 60A ₂ , 60A ₃ , 60A ₄ in the vertical direction in FIG. 12 are longer than the lengths of the movable conductors 60A ₁ , 60A ₅ in the vertical direction in FIG. The movable conductors 60A ₂ , 60A ₃ , 60A ₄ have a larger volume, mass, and moment of inertia than the movable conductors 60 ₁ , 60 ₅ . Therefore, among the movable conductors 60A ₁ , 60A ₂ , 60A ₃ , 60A ₄ , 60A ₅ that rotate with the opening operation, the movable conductors 60A ₂ , 60A ₃ , 60A ₄ hit the collision surfaces 72A ₂ , 72A ₃ , 72A _{4 .} First, the movable conductors 60A ₁ and 60A ₅ collide with the collision surfaces 72A ₁ and 72A ₅ .

In the second example shown in FIG. 13, the lengths of the movable conductors 60A ₁ , 60A ₂ , 60A ₃ , 60A ₄ , and 60A ₅ in the vertical direction in FIG. 13 are different from each other, and the movable conductors 60A ₁ , 60A ₂ , 60A ₃ , The volume, mass, and moment of inertia decrease in the order of 60A ₄ and 60A ₅ . Therefore, the movable conductors 60A ₁ , 60A ₂ , 60A ₃ , 60A ₄ , 60A ₅ that rotate with the opening operation hit the collision surface 72 in the order of the movable conductors 60A ₁ , 60A ₂ , 60A ₃ , 60A ₄ , 60A ₅ . collide.

In the third example shown in FIG. 14, the lengths of the movable conductors 60A ₁ and 60A ₅ in the vertical direction in FIG. 14 are longer than the lengths of the movable conductors 60A ₂ , 60A ₃ and 60A ₄ in the vertical direction in FIG. , the movable conductors 60 ₁ and 60 ₅ have a larger volume, mass, and moment of inertia than the movable conductors 60A ₂ , 60A ₃ , and 60A ₄ . Therefore, among the movable conductors 60A ₁ , 60A ₂ , 60A ₃ , 60A ₄ , 60A ₅ that rotate with the opening operation, the movable conductors 60A ₁ , 60A ₅ first collide with the collision surfaces 72A ₁ , 72A ₅ , and then , the movable conductors 60A ₂ , 60A ₃ , 60A ₄ collide with the collision surfaces 72A ₂ , 72A ₃ , 72A ₄ .

In the fourth example shown in FIG. 15, the lengths of the movable conductors 60A ₁ , 60A ₂ , 60A ₄ , and 60A ₅ in the vertical direction in FIG. 15 are longer than the lengths of the movable conductors 60A ₃ in the vertical direction in FIG. , the movable conductors 60A ₁ , 60A ₂ , 60A ₄ , and 60A ₅ have a larger volume, mass, and moment of inertia than the movable conductor 60A ₃ . Therefore, among the movable conductors 60A ₁ , 60A ₂ , 60A ₃ , 60A ₄ , 60A ₅ that rotate with the opening operation, the movable conductors 60A ₁ , 60A ₂ , 60A ₄ , 60A ₅ collide with the collision surfaces 72A ₁ , 72A ₂ , 72A ₄ and 72A ₅ first, and then the movable conductor 60A ₃ collides with the collision surface 72A ₃ .

In the first to fourth examples, the length of the movable conductor 60A in the vertical direction was changed, but the length of the movable conductor 60A in the horizontal direction may be changed. FIG. 16 is a front view showing a fifth example of a plurality of movable conductors according to the second embodiment.

In the fifth example shown in FIG. 16, the length of the movable conductor 60A ₃ in the left-right direction in FIG. 16 is longer than the length of the movable conductors 60A ₁ , 60A ₂ , 60A ₄ , 60A ₅ in the left-right direction in FIG. The movable conductor 60A ₃ has a larger volume, mass, and moment of inertia than the movable conductors 60A ₁ , 60A ₂ , 60A ₄ , and 60A ₅ . Therefore, among the movable conductors 60A ₁ , 60A ₂ , 60A ₃ , 60A ₄ , 60A ₅ that rotate with the opening operation, the movable conductor 60A ₃ collides with the collision surface 72A ₃ first, and then the movable conductor 60A ₁ , 60A ₂ , 60A ₄ , 60A ₅ collide with collision surfaces 72A ₁ , 72A ₂ , 72A ₄ , 72A ₅ .

In the example shown in FIG. 16, the length of one movable conductor 60A in the left-right direction is different from the length of the other four movable conductors 60A in the left-right direction, but two or more of the five movable conductors 60A The length in the left-right direction may be different from the length in the left-right direction of the other movable conductor 60A.

In this way, since the volumes of at least some of the plurality of movable conductors 60A in the first to fifth examples are different, the movable The impact generated on the child holder 7A can be reduced, and the vibration of the housing 2 can be reduced. Note that the volume of the movable conductor 60A can also be changed by changing both the length in the vertical direction and the length in the horizontal direction.

Further, the volume of the movable conductor 60A is changed by changing the volume closer to the open end of the movable conductor 60A than the movable contact 11a. The open end of the movable conductor 60A is the end opposite to the end connected to the flexible conductor 5, and is the end that does not become a current path when the movable contact 11a contacts the fixed contact 10. be. In the first to fifth examples, the open end of the movable conductor 60A is the upper end in FIGS. 12 to 15 than the movable contact 11a. In this way, by changing the volume of the region of the movable conductor 60A that is not a current path, it is possible to reduce the impact generated on the movable element holder 7A without changing the current characteristics of the movable element 6A.

Next, an example in which at least some of the plurality of movable conductors 60A have different densities will be described. FIG. 17 is a front view showing a sixth example of a plurality of movable conductors according to the second embodiment.

In the sixth example shown in FIG. 17, the shapes and volumes of the movable conductors 60A ₁ , 60A ₂ , 60A ₃ , 60A ₄ , and 60A ₅ are the same, but the movable conductors 60A ₁ and 60A ₅ are made of iron, The movable conductors 60A ₂ , 60A ₃ , 60A ₄ are made of copper. Since the density of copper is greater than the density of iron, the movable conductors 60A ₂ , 60A ₃ , 60A ₄ have a greater mass and moment of inertia than the movable conductors 60A ₁ , 60A ₅ . Therefore, among the movable conductors 60A ₁ , 60A ₂ , 60A ₃ , 60A ₄ , 60A ₅ that rotate with the opening operation, the movable conductors 60A ₂ , 60A ₃ , 60A ₄ hit the collision surfaces 72A ₂ , 72A ₃ , 72A _{4 .} First, the movable conductors 60A ₁ and 60A ₅ collide with the collision surfaces 72A ₁ and 72A ₅ .

In the example shown in FIG. 17, two types of members with different densities are used to make the densities of the plurality of movable conductors 60A different, but three or more types of members with different densities may be used, and two or more types of members with different densities may be used. The movable conductor 60A may be configured by combining members.

Further, in the above example, the volume or density of the movable conductor 60A is changed, but the timing of collision with the collision surface 72A may be varied by changing the length of the movable conductor 60A in the rotation direction. Further, the mass of the movable conductor 60A may be changed by changing at least two of the volume, density, and length in the rotation direction. The length in the rotation direction is the distance from when the movable conductor 60A starts rotating until it collides with the collision surface 72A.

Further, the circuit breaker according to the second embodiment has a configuration in which a collision surface 72 is formed in place of the collision surface 72A in addition to at least one of the volume, density, and length in the rotational direction of the movable conductor 60A. Good too. That is, the circuit breaker according to the second embodiment may have a configuration in which the movable conductor 60A according to the second embodiment and the collision surface 72 according to the first embodiment are combined.

As described above, in the plurality of movable conductors 60A of the circuit breaker according to the second embodiment, at least some of the movable conductors 60A have different volumes. As a result, in the circuit breaker according to the second embodiment, the moments of inertia of at least some of the movable conductors 60A can be made different, so that the collision of the movable element 6A including a plurality of movable conductors 60A with the movable element holder 7A Vibration of the housing 2 can be reduced.

Furthermore, among the plurality of movable conductors 60A, at least some of the movable conductors 60A have different densities. As a result, in the circuit breaker according to the second embodiment, the moments of inertia of at least some of the movable conductors 60A can be made different, so that the collision of the movable element 6A including a plurality of movable conductors 60A with the movable element holder 7A Vibration of the housing 2 can be reduced.

The configurations shown in the embodiments above are merely examples, and can be combined with other known techniques, or can be combined with other embodiments, within the scope of the gist. It is also possible to omit or change part of the configuration.

1 Breaker, 2 Housing, 3 Power supply side terminal, 4 Load side terminal, 5 Flexible conductor, 6, 6A mover, 7, 7A mover holder, 8 Contact pressure spring, 10 Fixed contact, 11, 11a movable Contact, 12 Holder shaft, 13 Mover pin, 20 Electromagnetic actuator, 21 Excitation coil, 25 Shaft, 30 Transmission mechanism, 31 Connection link, 32 Main shaft, 33 Link, 34, 35, 38 Connection pin, 36 Rotating shaft, 39 Opening spring, 40 Tripping mechanism, 45 Drive circuit, 60, 60 ₁ , 60 ₂ , 60 ₃ , 60 ₄ , 60 ₅ , 60A, 60A ₁ , 60A ₂ , 60A ₃ , 60A ₄ , 60A ₅ Movable conductor, 71 ₁ , 71 ₂ , 71 ₃ , 71 ₄ , 71 ₅ Storage space, 72, 72 ₁ , 72 ₂ , 72 ₃ , 72 ₄ , 72 ₅ , 72A, 72A ₁ , 72A ₂ , 72A ₃ , 72A ₄ , 72A ₅ Collision Surface, 73 guide hole.

Claims (5)

a movable element including a plurality of movable conductors;
a movable element holder that rotatably holds the plurality of movable conductors arranged in parallel and has a plurality of collision surfaces each colliding with a corresponding movable conductor among the plurality of movable conductors that rotate with the opening operation; Equipped with
A circuit breaker characterized in that at least part of the timing at which each of the plurality of movable conductors collides with a corresponding one of the plurality of collision surfaces differs. The plurality of collision surfaces are
The circuit breaker according to claim 1, wherein at least some of the collision surfaces collide with corresponding movable conductors among the plurality of movable conductors at different positions. The plurality of collision surfaces are
The circuit breaker according to claim 2, wherein the positions at which the plurality of movable conductors collide with corresponding movable conductors are different from each other. The plurality of movable conductors are
The circuit breaker according to claim 1, wherein at least some of the movable conductors have different volumes. The plurality of movable conductors are
The circuit breaker according to claim 1, wherein at least some of the movable conductors have different densities.

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