Circuit breaker
By associating the leakage tripping alarm component with the micro switch, the problem that existing circuit breakers cannot accurately indicate the type of leakage fault is solved, and the function of sending a clear alarm signal for leakage events to users is realized.
Patent Information
- Application Number
- CN202420965735.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-07
- Publication Date
- 2025-01-21
- Estimated Expiration
- 2034-05-07
AI Technical Summary
Existing circuit breakers cannot accurately indicate the type of leakage fault, making it difficult for users to understand the specific situation of the circuit fault.
A circuit breaker is designed. By associating the leakage tripping alarm component with the micro switch, the leakage event causes the micro switch state to switch, thereby sending an alarm signal of the leakage event to the user.
It is possible to send clear alarm signals to users when leakage events occur, helping users identify and deal with leakage faults.
Smart Images
Figure CN222380519U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to a circuit breaker, and more specifically to a circuit breaker capable of providing a leakage alarm function. Background Art
[0002] When a circuit fails, the circuit breaker can indicate the occurrence of the fault and trip the trip assembly to open the circuit breaker. However, in the prior art, the circuit breaker cannot indicate the specific fault type, especially the leakage fault, so that the user cannot accurately understand what type of fault has occurred in the circuit.
[0003] Therefore, it is desired to provide a circuit breaker to improve the defects in the above-mentioned prior art. Utility Model Content
[0004] According to one aspect of the utility model, a circuit breaker is proposed, comprising: a housing; a static contact fixed to the housing; a moving contact capable of moving to contact or separate from the static contact to put the circuit breaker in a closed state or an open state, respectively; a micro switch capable of switching between a first state and a second state; a leakage trip alarm assembly, comprising a push rod extending toward the micro switch; wherein the push rod is configured to move from a first position to a second position relative to the micro switch in response to the occurrence of a leakage event, so as to correspondingly switch the micro switch from the first state to the second state.
[0005] According to this solution, by associating the leakage trip alarm component with the micro switch, the occurrence of a leakage event can cause the state of the micro switch to switch, so as to indicate information about the leakage event to the user.
[0006] In some aspects, when the micro switch is in the second state, the micro switch may send an alarm signal.
[0007] According to this solution, in the event of a leakage event, the micro switch can send an alarm signal to the user to remind the user of the occurrence of the leakage event.
[0008] In some embodiments, when the push rod is in a first position, the first end of the push rod can contact and squeeze the button of the micro switch, and the push rod is configured to move away from the micro switch to a second position in response to the occurrence of a leakage event so that the first end of the push rod releases the button of the micro switch.
[0009] In some embodiments, the leakage current trip alarm assembly may include a coil, which is arranged near the second end of the push rod opposite to the first end thereof, the axial direction of the coil is parallel to the extension direction of the push rod, the coil is configured to be energized in response to the occurrence of a leakage current event, and at least the second end of the push rod is made of ferromagnetic material.
[0010] According to this scheme, in the event of a leakage fault, the coil is energized to generate a magnetic field. The magnetic field generated by the coil attracts the second end of the push rod made of ferromagnetic material, causing the second end of the push rod to move toward the coil, and the first end of the push rod to move away from the micro switch, causing the first end of the push rod to release the button of the micro switch, so that the micro switch switches from the first state to the second state.
[0011] In some solutions, the leakage trip alarm assembly may further include a first spring, and the push rod is biased to the first position by the first spring.
[0012] According to this solution, after the leakage fault is eliminated, the coil is no longer energized to generate a magnetic field, so that the second end of the push rod is no longer attracted by the coil. The push rod moves toward the micro switch under the action of the first spring, causing the first end of the push rod to contact and squeeze the button of the micro switch, causing the micro switch to switch from the second state to the first state.
[0013] In some embodiments, the circuit breaker may further include an indicator configured to move from a third position to a fourth position in response to the occurrence of a leakage event, wherein when the indicator is in the third position, the indicator indicates that no leakage event has occurred, and when the indicator is in the fourth position, the indicator indicates that a leakage event has occurred.
[0014] According to this solution, in addition to the electronic alarm signal issued by the micro switch, a mechanical alarm signal about the leakage fault can also be issued to the user through the indicator.
[0015] In some embodiments, the indicator may have an indicating body and a rod portion extending from the indicating body in a direction perpendicular to the extension direction of the push rod, when the indicating member is in a third position, the rod portion is located inside the housing of the circuit breaker, and when the indicating member is in a fourth position, at least part of the rod portion is located outside the housing of the circuit breaker.
[0016] According to this solution, the indicator pops up to the outside of the housing of the circuit breaker, thereby clearly alerting the user to the leakage fault.
[0017] In some embodiments, the indicating body may include a stop portion, which is configured to cooperate with the push rod so that when the push rod is in the first position, the stop portion is blocked by the push rod and cannot move toward the fourth position, and when the push rod is in the second position, the stop portion is released by the push rod and can move toward the fourth position.
[0018] In some aspects, the circuit breaker may further include a second spring configured to bias the indicator toward the fourth position.
[0019] According to this solution, in the event of a leakage fault, the push rod moves from the first position to the second position so that the push rod no longer blocks the movement of the indicator, and the indicator pops out to the outside of the circuit breaker housing under the action of the second spring, thereby alerting the user to the leakage fault.
[0020] In some embodiments, when the indicator is in the fourth position, the indicator can block the push rod from moving from the second position toward the first position; when the indicator moves from the fourth position toward the third position, the indicator releases the push rod to allow the push rod to move from the second position toward the first position.
[0021] According to this solution, after the leakage fault is eliminated, the user can operate the reset rod to move the indicator from the fourth position to the third position, so that the indicator releases the push rod, and the push rod is reset to the first position under the action of the first spring.
[0022] In some embodiments, the circuit breaker may further include a trip assembly connected to the moving contact, the trip assembly being capable of switching between a trip state and a latched state, wherein when the trip assembly is in the trip state, the trip assembly causes the moving contact to separate from the stationary contact, and when the trip assembly is in the latched state, the moving contact is capable of contacting the stationary contact.
[0023] In some aspects, the trip assembly may be disposed near the push rod and configured such that when the push rod moves from the first position to the second position, the trip assembly is actuated by the push rod to switch from the latched state to the tripped state.
[0024] According to this solution, the trip assembly can switch from a latched state to a tripped state in response to the occurrence of a leakage fault, so as to open the circuit breaker and protect the circuit.
[0025] In some embodiments, the push rod may have a push rod body and an actuating portion disposed on the push rod body, and when the push rod moves from a first position to a second position, the actuating portion contacts and actuates the trip assembly to switch the trip assembly from a latched state to a tripped state. BRIEF DESCRIPTION OF THE DRAWINGS
[0026] Figure 1 A schematic diagram of a circuit breaker according to an embodiment of the utility model is shown, wherein a leakage fault has not occurred;
[0027] Figure 2 A schematic diagram of a circuit breaker according to an embodiment of the present utility model is shown, wherein a leakage fault has occurred;
[0028] Figure 3 yes Figure 1 A partial enlarged view of .
[0029] Reference numerals:
[0030] 100 Circuit Breaker
[0031] 110 Leakage release housing
[0032] 120 Micro switch
[0033] 122 Button
[0034] 130 Putter
[0035] 132 Push rod body
[0036] 134 Actuator
[0037] 135 First End
[0038] 136 Second End
[0039] 138 First Spring
[0040] 140 Indicator
[0041] 142 Indicator
[0042] 144 Rod
[0043] 146 stopper
[0044] 148 Second Spring
[0045] 150 Coil
[0046] 160 Trip assembly DETAILED DESCRIPTION
[0047] In order to make the purpose, scheme and advantages of the technical solution of the utility model clearer, the technical solution of the embodiment of the utility model will be clearly and completely described in conjunction with the drawings of the specific embodiments of the utility model. Unless otherwise specified, the terms used in this article have the usual meanings in the art. The same reference numerals in the drawings represent the same components.
[0048] Figure 1 The schematic diagram of the circuit breaker 100 according to the embodiment of the utility model is shown. The circuit breaker 100 mainly includes a leakage release housing 110, a static contact (not shown), a moving contact (not shown) and a micro switch 120. The leakage release alarm assembly is accommodated in the leakage release housing 110. The static contact is fixed, the moving contact can move to contact or separate with the static contact so that the circuit breaker is in a closed state or an open state, respectively. The micro switch 120 can be in a first state (for example, Figure 1 As shown, the button 122 of the micro switch 120 is in a pressed state) and a second state (for example, Figure 2In order to indicate to the user that a leakage fault has occurred in the circuit, the circuit breaker 100 further includes a leakage trip alarm assembly, which includes a push rod 130 extending toward the micro switch 120. The push rod 130 is configured to move the micro switch 120 from a first position (such as Figure 1 as shown) moves to a second position (as shown) Figure 2 As shown), the micro switch 120 is switched from the first state to the second state accordingly.
[0049] Preferably, in the event of a leakage event, the micro switch 120 is in the second state, and the micro switch 120 can send an alarm signal to the user (for example, a visual, auditory, or any other alarm signal that can alert the user) to alert the user of the occurrence of the leakage event. Specifically, when the push rod 130 is in the first position, the first end 135 of the push rod 130 can contact and press the button 122 of the micro switch 120, and the push rod 130 is configured to move away from the micro switch 120 to the second position (i.e., as shown in FIG. 1 ) in response to the occurrence of the leakage event. Figure 1 ) so that the first end 135 of the push rod 130 releases the button 122 of the micro switch 120.
[0050] Preferably, the leakage trip alarm assembly may include a coil 150, which is arranged near the second end 136 of the push rod 130 opposite to the first end 135 thereof, the axial direction of the coil 150 is parallel to the extension direction of the push rod 130, and the coil 150 is configured to be energized in response to the occurrence of a leakage event, and at least the second end 136 of the push rod 130 is made of ferromagnetic material. In the event of a leakage fault, the coil 150 is energized to generate a magnetic field, and the magnetic field generated by the coil 150 attracts the second end 136 of the push rod 130 made of ferromagnetic material, so that the second end 136 of the push rod 130 moves toward the coil 150, and the first end 135 of the push rod 130 moves away from the micro switch 120, causing the first end 135 of the push rod 130 to release the button 122 of the micro switch 120, so that the micro switch 120 switches from the first state to the second state.
[0051] The circuit breaker 100 according to the utility model can be applied to a three-phase circuit, and the coil 150 can be energized in response to the state of the three-phase circuit. For example, when a leakage fault occurs, the currents of the three phase lines in the three-phase circuit are unbalanced, and the coil 150 can induce a current in response to the current imbalance, thereby generating a magnetic field that attracts the push rod 130.
[0052] Preferably, the leakage trip alarm assembly may further include a first spring 138, and the push rod 130 is biased to the first position by the first spring 138. When the leakage fault is eliminated, the coil 150 is no longer energized to generate a magnetic field, so that the second end 136 of the push rod 130 is no longer attracted by the coil 150, and the push rod 130 can move toward the micro switch 120 under the action of the first spring 138, causing the first end 135 of the push rod 130 to contact and squeeze the button 122 of the micro switch 120, so that the micro switch 120 switches from the second state to the first state, and the micro switch 120 no longer sends an alarm signal to the user and returns to the buckle state. It should be understood that, although in the above scheme, after the leakage fault is eliminated, the push rod 130 is automatically reset under the action of the first spring 138, the push rod 130 can also be designed to be manually reset under the action of the reset mechanism, and the manual reset scheme will be described below.
[0053] Preferably, the circuit breaker 100 may further include an indicator 140, which is configured to change from a third position (such as Figure 1 as shown) moves to the fourth position (as shown Figure 2 When the indicator 140 is in the third position, the indicator 140 indicates that no leakage event has occurred, and when the indicator 140 is in the fourth position, the indicator 140 indicates that a leakage event has occurred. In addition to the electronic alarm signal issued by the micro switch 120, a mechanical alarm signal about the leakage fault can also be issued to the user through the indicator 140.
[0054] Preferably, the indicator 140 may include an indicator body 142 and an extension extending from the indicator body in a direction perpendicular to the extension direction of the push rod 130 (ie, Figure 1 The left-right direction shown) (i.e., Figure 1 When the indicator 140 is at the third position, the rod 144 is located inside the housing of the circuit breaker 100. When the indicator 140 is at the fourth position, at least part of the rod 144 is located outside the housing of the circuit breaker 100. By the indicator 140 popping out to the outside of the housing of the circuit breaker 100, an alarm about the leakage fault can be clearly issued to the user.
[0055] Specifically, Figure 3 As shown, the indicating body 142 may include a stopper 146, which is configured to cooperate with the push rod 130, so that when the push rod 130 is in the first position, the stopper 146 is blocked by the push rod 130 and cannot move toward the fourth position (ie, Figure 1The push rod 130 is moved upward (as shown in the figure), and when the push rod 130 is in the second position, the stopper 146 is released by the push rod 130 and can move toward the fourth position. In addition, the circuit breaker 100 may also include a second spring 148, and the second spring 148 is configured to bias the indicator 140 toward the fourth position. In the event of a leakage fault, the push rod 130 moves from the first position to the second position, so that the push rod 130 no longer blocks the movement of the indicator 140, and the indicator 140 is ejected to the outside of the housing of the circuit breaker under the action of the second spring 148, thereby sending an alarm about the leakage fault to the user.
[0056] Preferably, when the indicator 140 is in the fourth position, the indicator 140 can block the push rod 130 from moving from the second position toward the first position; when the indicator 140 moves from the fourth position toward the third position, the indicator 140 releases the push rod 130 to allow the push rod 130 to reset from the second position to the first position. After the leakage fault is eliminated, the indicator 140 can be manually reset (i.e., moved from the fourth position to the third position) by a reset rod (not shown). The reset of the indicator 140 makes the indicator 140 no longer block the push rod 130, so that the push rod 130 is reset to its first position, thereby realizing manual reset of the push rod 130.
[0057] Preferably, the circuit breaker 100 may further include a trip assembly 160, the trip assembly 160 is coupled to the moving contact (for example, the trip assembly 160 is coupled to the moving contact through a transmission mechanism), the trip assembly 160 can be switched between a trip state and a latched state, when the trip assembly 160 is in the trip state, the trip assembly 160 causes the moving contact to separate from the stationary contact, when the trip assembly 160 is in the latched state, the moving contact can contact the stationary contact. The trip assembly 160 may be arranged near the push rod 130, and is configured such that when the push rod 130 moves from the first position to the second position, the trip assembly 160 is actuated by the push rod 130 to switch from the latched state to the trip state. Specifically, the push rod 130 may include a push rod body 132 and an actuating portion 134 disposed on the push rod body 132. When the push rod 130 moves from the first position to the second position, the actuating portion 134 contacts and actuates the trip assembly 160, so that the trip assembly 160 switches from the latched state to the tripped state. According to the above arrangement, the trip assembly 160 can switch from the latched state to the tripped state in response to the occurrence of a leakage fault, so that the circuit breaker 100 is opened to protect the circuit.
[0058] In summary, by associating the leakage trip alarm component with the micro switch 120 and / or the indicator 140, an electronic alarm signal and / or a mechanical alarm signal can be sent to the user in the event of a leakage fault, thereby realizing the leakage alarm function; by associating the leakage trip alarm component with the trip component 160, the circuit breaker 100 can be opened by the trip component 160 in the event of a leakage fault, thereby realizing the leakage trip function. It should be understood that the circuit breaker 100 of the utility model can independently realize the leakage alarm function and the leakage trip function, and different working modes can be selected according to different application requirements (i.e., having both the leakage alarm function and the leakage trip function; having only the leakage alarm function but not the leakage trip function; having only the leakage trip function but not the leakage alarm function). For example, in the case where only the leakage alarm function needs to be provided but not the leakage trip function, the leakage trip alarm component can be associated only with the micro switch 120 and / or the indicator 140, but not with the trip component 160.
[0059] This document describes in detail several exemplary embodiments of the present invention with reference to preferred embodiments. However, it will be understood by those skilled in the art that, without departing from the concept of the present invention, various modifications and variations may be made to the above-mentioned specific embodiments, and various technical features and structures proposed in the present invention may be combined without exceeding the protection scope of the present invention, which is determined by the appended claims.
Claims
1. A circuit breaker, characterized in that: include: case; A stationary contact fixed to the housing; A moving contact, capable of moving to contact or separate from the stationary contact to place the circuit breaker in a closed state or an open state, respectively; A micro switch capable of switching between a first state and a second state; A leakage trip alarm assembly, comprising a push rod extending toward the micro switch; The push rod is configured to move from a first position to a second position relative to the micro switch in response to the occurrence of a leakage event, so as to correspondingly switch the micro switch from the first state to the second state.
2. The circuit breaker according to claim 1, characterized in that: When the micro switch is in the second state, the micro switch sends an alarm signal.
3. The circuit breaker according to claim 1, characterized in that: When the push rod is in the first position, the first end of the push rod contacts and presses the button of the micro switch, and the push rod is configured to move away from the micro switch to the second position in response to the occurrence of the leakage event so that the first end of the push rod releases the button of the micro switch.
4. The circuit breaker according to claim 3, characterized in that: The leakage trip alarm assembly includes a coil, which is arranged near the second end of the push rod opposite to the first end thereof, the axial direction of the coil is parallel to the extension direction of the push rod, and the coil is configured to be energized in response to the occurrence of the leakage event, and at least the second end of the push rod is made of ferromagnetic material.
5. The circuit breaker according to claim 4, characterized in that: The leakage trip alarm assembly further includes a first spring, and the push rod is biased to the first position by the first spring.
6. The circuit breaker according to claim 1, characterized in that: The circuit breaker further includes an indicator configured to move from a third position to a fourth position in response to the occurrence of the leakage event, wherein when the indicator is in the third position, the indicator indicates that the leakage event has not occurred, and when the indicator is in the fourth position, the indicator indicates that the leakage event has occurred.
7. The circuit breaker according to claim 6, characterized in that: The indicator has an indicating body and a rod portion extending from the indicating body in a direction perpendicular to the extending direction of the push rod. When the indicator is located at the third position, the rod portion is located inside the housing of the circuit breaker. When the indicator is located at the fourth position, at least part of the rod portion is located outside the housing of the circuit breaker.
8. The circuit breaker according to claim 7, characterized in that: The indicating body includes a stop portion, which is configured to cooperate with the push rod, so that when the push rod is in the first position, the stop portion is blocked by the push rod and cannot move toward the fourth position, and when the push rod is in the second position, the stop portion is released by the push rod and can move toward the fourth position.
9. The circuit breaker according to claim 6, characterized in that: The circuit breaker also includes a second spring configured to bias the indicator toward the fourth position.
10. The circuit breaker according to claim 9, characterized in that When the indicator is in the fourth position, the indicator blocks the push rod from moving from the second position toward the first position; when the indicator moves from the fourth position toward the third position, the indicator releases the push rod to allow the push rod to move from the second position toward the first position.
11. The circuit breaker according to claim 1, characterized in that: It also includes a trip assembly, which is connected to the moving contact and can be switched between a trip state and a latch state. When the trip assembly is in the trip state, the trip assembly causes the moving contact to separate from the static contact. When the trip assembly is in the latch state, the moving contact can contact the static contact.
12. The circuit breaker according to claim 11, characterized in that The trip assembly is arranged near the push rod and is configured to be actuated by the push rod to switch from the latched state to the tripped state when the push rod moves from the first position to the second position.
13. The circuit breaker according to claim 12, characterized in that: The push rod has a push rod body and an actuating portion arranged on the push rod body. When the push rod moves from the first position to the second position, the actuating portion contacts and actuates the trip assembly to switch the trip assembly from the buckled state to the tripped state.