circuit breaker

Abstract

A kind of circuit breaker, contact support and movable contact arranged on contact support, contact support can drive movable contact and static contact contact and separate, it also includes switch module, the static contact is equipped with the reflector above, movable top rod is equipped on the reflector, the rotation of contact support can drive top rod to move, top rod moves when being able to trigger switch module state switching, by being arranged movable top rod on the reflector, contact support is moved while pushing top rod by being moved, and top rod drives switch module to indicate the working state of circuit breaker, effectively present reflector in existing circuit breaker, so that reflector can also be used for indicating the function of circuit breaker working state on the basis of protecting static contact and plugging.

Description

Technical Field

[0001] This invention relates to the field of low-voltage electrical appliances, and in particular to a circuit breaker. Background Technology

[0002] Circuit breakers are commonly used to control the connection and disconnection of circuits, and to automatically cut off the circuit in the event of a fault. To determine the operating status of the circuit breaker, an indicator device can be installed on it to indicate its status. However, existing indicator devices have drawbacks such as low utilization of internal components, complex structure, and high cost. Summary of the Invention

[0003] The purpose of this invention is to overcome the shortcomings of the prior art and provide a circuit breaker with an indication function.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] A circuit breaker includes a contact support and a moving contact disposed on the contact support. The contact support is capable of driving the moving contact to contact and separate from a stationary contact. It also includes a switch module. A reflector is disposed above the stationary contact, and a movable push rod is disposed on the reflector. Rotation of the contact support can drive the push rod to move, and the movement of the push rod can trigger a state switch of the switch module.

[0006] Preferably, it also includes a spring connected to the push rod, wherein the contact supports pushing the push rod to compress the spring when the rotary drive circuit breaker is closed, and releasing the spring when the rotary drive circuit breaker is opened, thereby driving the push rod to push the switch module through the spring.

[0007] Preferably, the push rod includes a top plate and a bottom plate disposed opposite to each other, and a side plate connected between the top plate and the bottom plate. The side plate is slidably mounted on the reflector plate. The contact support includes a support portion extending between the top plate and the bottom plate. The bottom side of the support portion can push the bottom plate to drive the push rod to compress the spring.

[0008] Preferably, the reflector includes a reflector base and two reflector columns respectively disposed on the reflector base, with a clearance groove formed between the two reflector columns to avoid the moving contact, the push rod being slidably disposed on the reflector column, and the spring being connected between the reflector base and the push rod.

[0009] Preferably, the reflective column has a hollow structure, and the top rod is provided with a guide rail that slides inside the reflective column.

[0010] Preferably, the inner side of the reflective column is provided with a hollow groove, and a guide groove is provided on the side wall of the hollow groove. The guide rail includes a first guide plate and a second guide plate connected between the first guide plate and the upper side plate. The second guide plate moves in the hollow groove, and the first guide plate slides in the guide groove.

[0011] Preferably, the side plate includes an upper side plate and a lower side plate connected together. The upper side plate and the lower side plate are respectively connected to the top plate and the bottom plate. The upper side plate is disposed on the side of the lower side plate near the reflector column. The lower side plate is disposed perpendicular to the upper side plate. The upper side plate is slidably mounted on the reflector plate.

[0012] Preferably, the reflector seat is provided with a sleeve, and the end of the spring away from the top rod is inserted into the sleeve for limitation.

[0013] Preferably, an arc-extinguishing chamber is provided above the stationary contact, and the reflector includes a front reflector and a rear reflector, as well as a lower reflector connected between the front reflector and the rear reflector. The lower reflector is disposed above the stationary contact and between the arc-extinguishing chamber, and an avoidance hole is provided in the middle of the lower reflector. The front reflector is disposed on the side of the arc-extinguishing chamber near the contact support, and the rear reflector is disposed on the side of the arc-extinguishing chamber away from the contact support.

[0014] Preferably, the switch module includes a micro switch and a trigger button. The micro switch is connected to an indicator circuit. When the push rod approaches the switch module, it presses the trigger button. When the push rod moves away from the switch module, it releases the trigger button. Pressing and releasing the trigger button can respectively trigger the micro switch to switch states. When the micro switch switches states, it drives the indicator circuit to indicate.

[0015] The circuit breaker created by this invention uses a movable push rod on the reflector plate, which allows the contact support to push the push rod to move while it is in operation. The push rod drives the switch module to indicate the working status of the circuit breaker. This effectively utilizes the reflector plate in existing circuit breakers, so that the reflector plate can not only protect the stationary contact and block the air, but also indicate the working status of the circuit breaker.

[0016] Furthermore, by connecting the push rod to the spring, the contact support pushes the push rod to compress the spring when the circuit breaker is closed, and releases the spring when the circuit breaker is opened. By driving the push rod to push the switch module through the spring, the obstruction to the contact support during opening can be reduced, avoiding affecting the moving contact from leaving the stationary contact. Moreover, the action of the spring can also accelerate the separation of the moving contact from the stationary contact. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the circuit breaker created by the present invention;

[0018] Figure 2 This is a schematic diagram of the contact support structure created by the present invention;

[0019] Figure 3 This is a cross-sectional view of the circuit breaker invented in this invention;

[0020] Figure 4 This invention creates a contact support position during closing;

[0021] Figure 5 This invention creates a contact support position during circuit breaking;

[0022] Figure 6 This is a schematic diagram illustrating the cooperation between the reflector and the top rod of this invention;

[0023] Figure 7 This is an exploded view of the invention.

[0024] Figure 8 This is a schematic diagram of the structure of the push rod created in this invention;

[0025] Figure 9 This is another schematic diagram showing the combination of the reflector and the top rod created by this invention. Detailed Implementation

[0026] The following is in conjunction with the appendix Figures 1 to 9 The given embodiments further illustrate specific implementations of the circuit breaker created by the present invention. The circuit breaker created by the present invention is not limited to the descriptions of the following embodiments.

[0027] like Figure 3-7 As shown, the circuit breaker created by the present invention includes a contact support 2 and a moving contact 11 disposed on the contact support 2. The contact support 2 is used to drive the moving contact 11 to contact and separate from the stationary contact 12 to realize the opening and closing of the circuit breaker. It also includes a switch module 3. A reflector plate is provided above the stationary contact 12, and a movable push rod 5 is provided on the reflector plate. The rotation of the contact support 2 can drive the push rod 5 to move. When the push rod 5 moves, it can trigger the state switching of the switch module 3.

[0028] The circuit breaker created by this invention uses a movable push rod 5 on a reflector plate, which allows the contact support 2 to move while the contact support 2 is activated. The operating status of the circuit breaker is indicated by the drive switch module 3 of the push rod 5. This effectively utilizes the reflector plate in existing circuit breakers, allowing the reflector plate to not only protect the stationary contact 12 and block air, but also to assist in indicating the operating status of the circuit breaker. The push rod 5 is mounted on the reflector plate and assembled into the housing 1, facilitating cooperation with the contact support 2.

[0029] like Figure 1-2As shown, the circuit breaker in this embodiment is a three-pole molded case circuit breaker, including three main circuits arranged sequentially: a first circuit 1P, a second circuit 2P, and a third circuit 3P. Each main circuit includes a contact support 2, a moving contact 11, and a stationary contact 12. The contact supports 2 of the three main circuits are connected. The contact support 2 includes a rotating shaft 21 rotatably mounted on the housing 1, and two support parts 22 disposed on one side of the rotating shaft 21. The two support parts 22 are respectively located on both sides of the moving contact 11. When the contact support 2 drives the moving contact 11 to rotate, the support parts 22 on the contact support 2 connect with the top of the moving contact 11. The lever 5 cooperates with the top lever 5 to drive the switch module 3. In this embodiment, the switch module 3 includes a micro switch and a trigger button 31. The micro switch is connected to an indicator circuit (not shown in the figure). When the top lever 5 approaches the switch module 3, it presses the trigger button 31. When the top lever 5 moves away from the switch module 3, it releases the trigger button 31. Pressing and releasing the trigger button 31 can respectively trigger the micro switch to switch states. When the micro switch switches states, it drives the indicator circuit to indicate. The indicator circuit can display the circuit breaker's operating status through LEDs, sound, or remote signals. In this embodiment, an operating mechanism (not shown in the figure) and a handle 13 are provided above the contact support 2 of the second circuit 2P. Mounting slots 30 for mounting accessory modules are provided above the contact support 2 of the first circuit 1P and the third circuit 3P, respectively. The mounting slots 30 on the first circuit 1P and the third circuit 3P are arranged opposite each other on both sides of the operating mechanism. In this embodiment, the switch module 3 can be installed in the mounting slot 30 above the first circuit 1P or the mounting slot 30 above the third circuit 3P. Understandably, it can also be used for single-pole circuit breakers and circuit breakers with other pole numbers; no specific limitations are made here.

[0030] like Figure 3 As shown, an arc-extinguishing chamber 6 is provided above the stationary contact 12. The moving contact 11 extends into the arc-extinguishing chamber 6 and cooperates with the stationary contact 12. The arc-extinguishing chamber 6 includes two opposing clamping plates (not shown in the figure) and multiple arc-extinguishing grid plates (not shown in the figure) disposed between the two clamping plates. The middle part of the multiple arc-extinguishing grid plates is provided with an arc-extinguishing opening with a V-shaped structure. The arc-extinguishing opening is used to avoid the moving contact 11. The arc-extinguishing grid plates form arc-extinguishing sections on both sides of the arc-extinguishing opening. The electric arc generated between the moving contact 11 and the stationary contact 12 is extinguished by the arc-extinguishing grid plates.

[0031] like Figure 6As shown, the reflector plate includes a front reflector 41 and a rear reflector 43, and a lower reflector 42 connected between the front reflector 41 and the rear reflector 43. The lower reflector 42 is disposed above the stationary contact 12 and between the arc-extinguishing chamber 6. The lower reflector 42 has a clearance hole 44 in the middle, which can be fitted onto the contact point of the stationary contact 12. The other parts of the lower reflector 42 shield the upper surface of the stationary contact 12, thus protecting the stationary contact 12. The front reflector 41 is disposed on the side of the two clamping plates of the arc-extinguishing chamber 6 near the contact support 2, and the rear reflector 43 is disposed on the side of the two clamping plates of the arc-extinguishing chamber 6 away from the contact support 2. The front reflector 41 and the rear reflector 43, together with the two clamping plates of the arc-extinguishing chamber 6, form a closed space, which controls the gas flow direction in the arc-extinguishing chamber 6. By driving the arc movement through the gas flow direction, the breaking capacity of the circuit breaker can be improved. Preferably, the reflector is a gas-generating material, which can generate gas and enhance the function of airflow guiding the electric arc.

[0032] like Figure 6-7 As shown, the front reflector 41 includes a reflector base 45 and two reflector columns 46 respectively disposed on the reflector base 45. The two reflector columns 46 correspond to the arc-extinguishing sections on both sides of the arc-extinguishing grid. An avoidance groove 47 corresponding to the arc-extinguishing opening on the arc-extinguishing grid is formed between the two reflector columns 46. The avoidance groove 47 is used to avoid the moving contact 11. The top rod 5 is slidably disposed on one side of the reflector column 46. The reflector column 46 can prevent the gas in the arc-extinguishing chamber 6 from flowing from the contact support 2 to other parts of the circuit breaker, thus protecting other parts of the circuit breaker. The avoidance groove 47 can avoid the moving contact 11. When the circuit breaker is closed, the contact support 2 can drive the moving contact 11 to swing downward and contact the stationary contact 12. When the circuit breaker is opened, the contact support 2 can drive the moving contact 11 to swing upward and separate from the stationary contact 12.

[0033] In this embodiment, the push rod 5 indicates the closed and open states of the circuit breaker. The push rod 5 is connected to a spring 7. The spring 7 drives the push rod 5 to push the switch module 3. When the circuit breaker is closed, the contact support 2 pushes the push rod 5 away from the switch module 3, overcoming the action of the spring 7, thus indicating the closed state. When the circuit breaker is open, the contact support 2 releases the push rod 5, releasing the spring 7. The spring 7 then drives the push rod 5 to push the indicator module, indicating the open state. It is understood that it can also be used to indicate only one of the closed and open states, or both; no specific limitation is made here.

[0034] like Figure 8As shown, the top rod 5 in this embodiment includes a top plate 51 and a bottom plate 52 arranged opposite each other, and a side plate connected between the top plate 51 and the bottom plate 52 on one side. The side plate is slidably mounted on the reflector post 46. The bottom plate 52 has a fixing post 71 for limiting the spring 7 on the side away from the top plate 51. The spring 7 is connected between the reflector seat 45 and the top rod 5. One end of the spring 7 is sleeved on the fixing post 71 for upper limit, and the other end of the spring 7 away from the fixing post 71 is inserted into the sleeve 72 on the reflector seat 45 for limit. The support part 22 of the contact support 2 extends between the top plate 51 and the bottom plate 52. When the circuit breaker is closed, the support part 22 swings downward, pushing the bottom plate 52 through the bottom side of the support part 22, causing the top rod 5 to move downward against the elastic force of the spring 7. When the circuit breaker is opened, the support part 22 swings upward, the bottom side of the support part 22 moves away from the bottom plate 52 and releases the spring 7, and the spring 7 pushes the bottom plate 52 to drive the top rod 5 to move upward and push the switch module 3.

[0035] It is understandable that the spring 7 can be omitted, and when the circuit breaker is tripped, the contact support 2 can directly push the top plate 51 to move the top rod 5. However, the spring 7 drives the top rod 5 to push the switch module 3, which can reduce the obstruction to the contact support 2 and avoid affecting the moving contact 11 from leaving the stationary contact 12. Moreover, the action of the spring 7 can accelerate the separation of the moving contact 11 from the stationary contact 12. All of these are within the protection scope of this invention.

[0036] like Figure 6-9 As shown, the side plate includes an upper side plate 53 and a lower side plate 54 connected together. The upper side plate 53 and the lower side plate 54 are respectively connected to the top plate 51 and the bottom plate 52. The upper side plate 53 is disposed on the side of the lower side plate 54 near the reflector column 46, and the lower side plate 54 is disposed perpendicular to the upper side plate 53. The side of the upper side plate 53 is provided with a guide rail 8 that is slidably mounted on the reflector column 46. The reflector column 46 has a hollow structure, and the top rod 5 is provided with a guide rail 8 that slides inside the reflector column 46. Specifically, the inner side of the reflector column 46 is provided with a hollow groove 81, and a guide groove 82 is provided on the side wall of the hollow groove 81. The guide rail 8 has a T-shaped cross-section and includes a first guide plate 83 and a second guide plate 84 connected between the first guide plate 83 and the upper side plate 53. The second guide plate 84 moves within the hollow groove 81, and the first guide plate 83 slides within the guide groove 82.

[0037] By sliding the top rod 5 onto the reflector column 46 of the reflector plate, the hollow structure of the reflector column 46 can be effectively utilized. A guide groove 82 is provided on the reflector column 46 to slide the top rod 5 onto the reflector plate, resulting in a simple structure, convenient assembly, and small size. Preferably, the lower side plate 54 is bent outwards to form a curved structure 55, which increases the contact area with the spring 7.

[0038] The above description, in conjunction with specific preferred embodiments, provides a further detailed explanation of the present invention. It should not be construed that the specific implementation of the present invention is limited to these descriptions. For those skilled in the art, various simple deductions or substitutions can be made without departing from the inventive concept, and all such modifications and substitutions should be considered within the scope of protection of the present invention.

Claims

1. A circuit breaker, comprising a contact support (2) and a moving contact (11) disposed on the contact support (2), wherein the contact support (2) is capable of driving the moving contact (11) to contact and separate from a stationary contact (12), characterized in that: It also includes a switch module (3), a reflector plate is provided above the stationary contact (12), and a movable top rod (5) is provided on the reflector plate. The reflector plate includes a reflector base (45) and two reflector columns (46) respectively provided on the reflector base (45). An avoidance groove (47) is formed between the two reflector columns (46) to avoid the moving contact (11). The top rod (5) is slidably provided on the reflector column (46). The rotation of the contact support (2) can drive the top rod (5) to move. When the top rod (5) moves, it can trigger the state switching of the switch module (3).

2. The circuit breaker according to claim 1, characterized in that: It also includes a spring (7) connected to the push rod (5). The contact support (2) pushes the push rod (5) to compress the spring (7) when the rotary drive circuit breaker is closed, and releases the spring (7) when the rotary drive circuit breaker is opened. The spring (7) drives the push rod (5) to push the switch module (3).

3. The circuit breaker according to claim 2, characterized in that: The top rod (5) includes a top plate (51) and a bottom plate (52) arranged opposite to each other, and a side plate connected between the top plate (51) and the bottom plate (52). The side plate is slidably mounted on the reflector plate. The contact support (2) includes a support part (22) extending between the top plate (51) and the bottom plate (52). The bottom side of the support part (22) can push the bottom plate (52) to drive the top rod (5) to compress the spring (7). The spring (7) is connected between the reflector seat (45) and the top rod (5).

4. The circuit breaker according to claim 1, characterized in that: The reflective column (46) has a hollow structure, and the top rod (5) is provided with a guide rail (8) that slides inside the reflective column (46).

5. The circuit breaker according to claim 3, characterized in that: The reflective column (46) has a hollow structure. The top rod (5) is provided with a guide rail (8) that slides inside the reflective column (46). The inner side of the reflective column (46) is provided with a hollow groove (81). A guide groove (82) is provided on the side wall of the hollow groove (81). The side plate includes an upper side plate (53). The guide rail (8) includes a first guide plate (83) and a second guide plate (84) connected between the first guide plate (83) and the upper side plate (53). The second guide plate (84) moves in the hollow groove (81), and the first guide plate (83) slides in the guide groove (82).

6. The circuit breaker according to claim 3, characterized in that: The side plate includes an upper side plate (53) and a lower side plate (54) connected together. The upper side plate (53) and the lower side plate (54) are respectively connected to the top plate (51) and the bottom plate (52). The upper side plate (53) is disposed on the side of the lower side plate (54) near the reflector column (46). The lower side plate (54) is perpendicular to the upper side plate (53). The upper side plate (53) is slidably mounted on the reflector plate.

7. The circuit breaker according to claim 3, characterized in that: The reflector seat (45) is provided with a sleeve (72), and the end of the spring (7) away from the top rod (5) is inserted into the sleeve (72) for a limit.

8. The circuit breaker according to claim 1, characterized in that: An arc-extinguishing chamber (6) is provided above the stationary contact (12). The reflector plate includes a front reflector (41) and a rear reflector (43), and a lower reflector (42) connected between the front reflector (41) and the rear reflector (43). The lower reflector (42) is located above the stationary contact (12) and between the arc-extinguishing chamber (6). A clearance hole (44) is provided in the middle of the lower reflector (42). The front reflector (41) is located on the side of the arc-extinguishing chamber (6) close to the contact support (2), and the rear reflector (43) is located on the side of the arc-extinguishing chamber (6) away from the contact support (2).

9. The circuit breaker according to claim 1, characterized in that: The switch module (3) includes a micro switch and a trigger button (31). The micro switch is connected to the indicator circuit. When the push rod (5) approaches the switch module (3), it presses the trigger button (31). When the push rod (5) moves away from the switch module (3), it releases the trigger button (31). Pressing the trigger button (31) and releasing the trigger button (31) can respectively trigger the micro switch to switch states. When the micro switch switches states, it drives the indicator circuit to indicate.

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