A circuit breaker

Abstract

The application provides a circuit breaker, and relates to the technical field of low-voltage electrical appliances, comprising a shell, a mechanism seat, an indicating piece, a lock catch piece and a trip catch piece are rotationally arranged in the shell, the indicating piece has a fault indicating area and a working indicating area, and a handle is arranged on the shell; after the fault is tripped, the trip catch piece is reset through the reset of the handle, the lock catch piece is driven to rotate when the trip catch piece is reset, the lock catch piece drives the indicating piece to rotate, so that the fault indicating area of the indicating piece is exposed from the shell; the mechanism seat drives the indicating piece to reset to the working indicating area exposed from the shell. The lock catch piece drives the indicating piece to rotate to perform fault indication, and the mechanism seat drives the indicating piece to rotate to reset to perform working indication, so that the action of the indicating piece is reliable, the action of the indicating piece is irrelevant to the reset speed of the mechanism and the tightness of the riveting of the shell, the reliable use of the indicating function can be ensured, the misoperation of the circuit breaker closing is avoided when the fault type is not judged and the fault is eliminated, and thus the reliability of the circuit breaker is improved.

Description

Technical Field

[0001] This application relates to the field of low-voltage electrical technology, specifically to a circuit breaker. Background Technology

[0002] Circuit breakers typically have indicators to show whether the circuit breaker is in normal or fault condition, facilitating operator identification. In current circuit breakers, when a fault trips, the time difference between the slower reset speed of the handle and the slower reset speed of the mechanism causes the tripping element to rotate relative to the mechanism, which in turn drives the indicator to move, thus indicating the fault. However, when the time difference between the handle reset and the mechanism reset is small, the rotation angle of the tripping element relative to the mechanism is too small to reliably drive the indicator, affecting the reliability of the indication function. This can easily lead to operator misjudgment of the circuit breaker and, based on this misjudgment, erroneously re-closing the circuit breaker without first determining the fault type and eliminating the fault. Utility Model Content

[0003] The purpose of this application is to provide a circuit breaker that can improve the reliability of indicated actions and avoid malfunctions of the circuit breaker.

[0004] In one aspect of this application, a circuit breaker is provided, including a housing. A mechanism base, an indicator, a locking element, and a tripping element are rotatably disposed within the housing. The indicator has a fault indication area and a working indication area. A handle is provided on the housing. After a fault trip, the tripping element is reset by resetting the handle. When the tripping element resets, it drives the locking element to rotate, and the locking element drives the indicator to rotate, so that the fault indication area of ​​the indicator is exposed within the housing. The mechanism base drives the indicator to reset until the working indication area is exposed within the housing.

[0005] Optionally, the indicator has a first tripping boss, and the locking member has a second tripping boss. Through the cooperation of the second tripping boss and the first tripping boss, after the circuit breaker trips due to a fault, the locking member drives the indicator to rotate to the fault indication area to expose the housing.

[0006] Optionally, the jump fastener is rotatably connected to the mechanism seat, the jump fastener drives the mechanism seat to rotate, the mechanism seat drives the indicator to rotate, the indicator has a first reset boss, and the mechanism seat has a second reset boss. Through the cooperation of the second reset boss and the first reset boss, when the circuit breaker is closed again, the working indicator area of ​​the indicator driven by the mechanism seat is exposed in the housing.

[0007] Optionally, the indicator is further provided with an elastic element, the elastic element is provided with a positioning support end, and the housing is provided with a positioning groove. The indicator is pressed against the housing for positioning by the abutment of the positioning support end and the positioning groove.

[0008] Optionally, the positioning groove includes a fault positioning groove and a reset positioning groove arranged adjacent to each other. When the positioning support end is located in the fault positioning groove, the fault indication area of ​​the indicator is exposed in the housing; when the positioning support end is located in the reset positioning groove, the working indication area of ​​the indicator is exposed in the housing.

[0009] Optionally, the inner wall of the housing is provided with a reset stop position and a fault stop position, and the indicator is located between the reset stop position and the fault stop position. The reset stop position is used to abut against the indicator when the indicator is reset, so as to limit the reset of the indicator. The fault stop position is used to limit the indicator when the circuit breaker is in a fault state and the indicator rotates to abut against the fault stop position.

[0010] Optionally, the indicator includes a rotating shaft, the indicator being rotatably connected to the housing via the rotating shaft, a first reset boss and a first tripping boss being located at the end of the rotating shaft facing the locking member along the thickness direction of the circuit breaker; an elastic member is connected to the rotating shaft, the elastic member being located at the end away from the locking member along the thickness direction of the circuit breaker.

[0011] Optionally, the indicator is located above the mechanism seat within the housing along the height direction of the circuit breaker.

[0012] Optionally, the trip fastener has a first abutting portion and the locking fastener has a second abutting portion. When the circuit breaker is closed, the trip fastener and the locking fastener abut against each other through the first abutting portion and the second abutting portion. After the circuit breaker trips due to a fault, the trip fastener and the locking fastener separate through the first abutting portion and the second abutting portion.

[0013] The circuit breaker provided in this application embodiment has an indicator rotatably mounted inside the housing. A locking member drives the indicator to rotate for fault indication, and a mechanism seat drives the indicator to rotate and reset for working indication. This makes the operation of the indicator reliable, and the operation of the indicator is independent of the reset speed of the mechanism. Furthermore, since the movement direction and force direction of all mechanism components inside the housing are perpendicular to the riveting direction of the housing, all mechanism components and the housing are clearance-fitted in the riveting direction of the housing. This ensures that the operation of the mechanism components, including the indicator, is independent of the tightness of the housing riveting, thus guaranteeing the reliable use of the indication function. It also prevents the circuit breaker from re-closing before the fault type has been determined and the fault has been eliminated, thereby improving the reliability of the circuit breaker. Attached Figure Description

[0014] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments of this application will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 This is a schematic diagram of the circuit breaker's closed state provided in an embodiment of this application;

[0016] Figure 2 This is a schematic diagram of the circuit breaker in closed state from another perspective, provided in an embodiment of this application.

[0017] Figure 3 yes Figure 2 Enlarged view of point A in the middle;

[0018] Figure 4 This is one of the schematic diagrams of the circuit breaker indicator structure provided in the embodiments of this application;

[0019] Figure 5 This is the second schematic diagram of the circuit breaker indicator structure provided in the embodiments of this application;

[0020] Figure 6 This is one of the partial structural schematic diagrams of the circuit breaker provided in the embodiments of this application;

[0021] Figure 7 This is the second partial structural schematic diagram of the circuit breaker provided in the embodiments of this application;

[0022] Figure 8 This is a schematic diagram of the circuit breaker in the open state provided in an embodiment of this application;

[0023] Figure 9 This is a schematic diagram of the circuit breaker fault tripping process provided in the embodiments of this application;

[0024] Figure 10 yes Figure 9 Enlarged view at point B in the middle;

[0025] Figure 11 This is a schematic diagram of the circuit breaker fault disconnection state provided in the embodiments of this application;

[0026] Figure 12 This is a schematic diagram of the circuit breaker failure and reset process provided in the embodiments of this application.

[0027] Icons: 10-Housing; 101-Reset stop position; 102-Fault stop position; 103a-Reset positioning groove; 103b-Fault positioning groove; 104-Window; 11-Handle; 12-Indicator; 120-Rotating shaft; 121-First reset boss; 122-First tripping boss; 123-Elastic element; 124-Positioning support end; 125-Fault indication area; 126-Working indication area; 13-Mechanism seat; 131-Second reset boss; 14-Connecting rod; 15-Jump fastener; 151-First support part; 16-Locking element; 161-Second support part; 162-Second tripping boss; 163-Trip part; 17-Moving contact; 18-Stationary contact; 20-Electromagnetic trip unit; 21-Double metal; 22-Pull rod; H-Height direction; T-Thickness direction. Detailed Implementation

[0028] The technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings.

[0029] In the description of this application, it should be noted that the terms "inner" and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product is in use. They are used only for the convenience of describing this application and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application. Furthermore, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0030] It should also be noted that, unless otherwise explicitly specified and limited, the terms "setup" and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0031] Please refer to Figure 1 , Figure 9 As shown, this application embodiment provides a circuit breaker, including: a housing 10, an indicator 12, a locking member 16, and a tripping member 15 rotatably disposed within the housing 10, the indicator 12 having an adjacent fault indication area 125 and a working indication area 126; the housing 10 is also provided with a handle 11, after a fault trip, the tripping member 15 is reset by resetting the handle 11, the tripping member 15 is driven to rotate when the tripping member 15 is reset, the locking member 16 is driven to rotate, the locking member 16 drives the indicator 12 to rotate, so that the fault indication area 125 of the indicator 12 is exposed in the housing 10, and the mechanism seat 13 also drives the indicator 12 to reset to the working indication area 126 exposed in the housing 10.

[0032] The handle 11 drives the jump fastener 15 to rotate via the connecting rod 14. The jump fastener 15, locking fastener 16 and indicator 12 move in sequence, which can drive the indicator 12 to move and indicate. In addition, the locking fastener 16 is coaxially connected to the mechanism base 13 and the moving contact 17. The jump fastener 15 is rotatably connected to the mechanism base 13 and engages with the locking fastener 16. The jump fastener 15, locking fastener 16 and mechanism base 13 form a whole and move synchronously. Therefore, when the jump fastener 15 rotates, the mechanism base 13 and the moving contact 17 also rotate coaxially to drive the moving contact 17 to close or open normally.

[0033] When the circuit breaker is in the normal closed or normal open state, the working indication area 126 of the indicator 12 is shown through the window 104 on the housing 10; when the circuit breaker is in the fault open state, the fault indication area 125 of the indicator 12 is shown through the window 104 on the housing 10.

[0034] In the event of a fault trip, the locking element 16 is driven to rotate by the electromagnetic trip unit 20 or the double metal trip unit 21. The locking element 16 and the jumping element 15 are unlocked and separated. The jumping element 15 can rotate relative to the mechanism base 13. Under the action of the mechanism reset spring, the mechanism base 13 and the moving contact 17 rotate, and the moving contact 17 and the stationary contact 18 are disengaged and separated. For example, Figure 1 As shown, the electromagnetic release device 20 drives the locking member 16 to release via the release part 163 of the driving locking member 16, and the double metal 21 drives the locking member 16 to rotate and release via the pull rod 22.

[0035] When the locking element 16 is driven to rotate and trip by the electromagnetic trip unit 20 or the double metal 21, the locking element 16 separates from the tripping element 15. Then, the return spring of the handle 11 resets the handle 11. The reset of the handle 11 drives the tripping element 15 to reset. When the tripping element 15 resets, it drives the locking element 16 to rotate. The locking element 16 drives the indicator 12 to rotate. The indicator 12 rotates to the position where the fault indication area 125 is exposed in the housing 10, indicating that the circuit breaker is currently in a fault state.

[0036] When the circuit breaker is closed, the handle 11 drives the trip fastener 15, the mechanism seat 13, and the indicator 12 to move. The indicator 12 is driven to rotate its working indicator area 126 to the position of exposing the housing 10 to indicate that the circuit breaker is currently in working condition.

[0037] The circuit breaker provided in this application embodiment has an indicator 12 rotatably mounted inside the housing 10. The locking member 16 drives the indicator 12 to rotate for fault indication, and the mechanism seat 13 drives the indicator 12 to rotate and reset for working indication. The rotatable mounting method ensures the reliable operation of the indicator 12. The operation of the indicator 12 is independent of the mechanism reset speed. Furthermore, since the movement direction and force direction of all mechanism components inside the housing 10 are perpendicular to the riveting direction of the housing 10, all mechanism components and the housing 10 are clearance-fitted in the riveting direction of the housing 10. This makes the operation of the mechanism components, including the indicator 12, independent of the tightness of the riveting of the housing 10. In contrast, the indicator in the prior art is subjected to elastic force in the riveting direction of the housing, and the magnitude of the elastic force is related to the tightness of the riveting of the housing. Therefore, the configuration of this application ensures the reliable use of the indication function, avoids the circuit breaker from re-closing before the fault type is determined and the fault is eliminated, and improves the reliability of the circuit breaker.

[0038] Figure 1 The circuit breaker is shown in its closed state. The trip fastener 15 is rotatably connected to the mechanism base 13, and the locking fastener 16 is coaxially arranged with the mechanism base 13 and the moving contact 17. Figure 1 , Figure 6 As shown, along the thickness direction T of the circuit breaker, the locking member 16, the moving contact 17 and the mechanism seat 13 are stacked, and the moving contact 17 is locked in the mechanism seat 13.

[0039] When the circuit breaker is closed, the handle 11 drives the connecting rod 14, causing the tripping fastener 15, locking fastener 16, mechanism base 13, and moving contact 17 to rotate synchronously, thus closing the moving contact 17 and the stationary contact 18. In the closed state, as... Figure 6 As shown, the trip fastener 15 has a first abutting portion 151, and the locking fastener 16 has a second abutting portion 161. The trip fastener 15 and the locking fastener 16 abut against each other through the first abutting portion 151 and the second abutting portion 161. The moving contact 17 and the stationary contact 18 are in contact. The working indicator area 126 on the indicator 12 is exposed through the window 104 of the housing 10 to indicate that the circuit breaker is in a closed normal working state.

[0040] Furthermore, such as Figure 2 , Figure 3 As shown, the indicator 12 has a first reset boss 121, and the mechanism seat 13 has a second reset boss 131. Through the cooperation of the first reset boss 121 and the second reset boss 131, the mechanism seat 13 drives the indicator 12 to reset to the working indicator area 126, which exposes the housing 10.

[0041] When the circuit breaker is closed, the mechanism base 13 rotates, which drives the first reset boss 121 on the indicator 12 to move via the second reset boss 131 on the mechanism base 13, causing the indicator 12 to move along... Figure 1Rotate counterclockwise so that the working indicator area 126 on the indicator 12 rotates to the position of the window 104 of the housing 10 and is exposed from the window 104.

[0042] like Figure 7 As shown, a reset stop position 101 and a fault stop position 102 are provided on the inner wall of the housing 10. The indicator 12 is located between the reset stop position 101 and the fault stop position 102. The reset stop position 101 is used to limit the rotation of the indicator 12 during reset, so as to position the indicator 12 in the exposed position of the working indicator area 126, as shown. Figure 1 As shown.

[0043] The fault stop position 102 is used when the circuit breaker is in a fault state, so that the indicator 12 rotates to abut against the fault stop position 102, thereby limiting the indicator 12 in the fault state and restricting the indicator 12 to the state shown in the fault indication area 125, such as... Figure 9 As shown.

[0044] When the circuit breaker is normally disconnected, such as Figure 8 As shown, operating the handle 11 causes it to rotate in the opposite direction, which in turn drives the jump fastener 15, locking fastener 16, mechanism seat 13 and moving contact 17 to rotate via the connecting rod 14, causing the moving contact 17 and stationary contact 18 to separate. At this time, the jump fastener 15 and locking fastener 16 remain in a supporting state through the first supporting part 151 and the second supporting part 161.

[0045] For indicator 12, such as Figure 4 , Figure 5 As shown, the indicator 12 is provided with an elastic element 123, the elastic element 123 is provided with a positioning support end 124, and the housing 10 is provided with a positioning groove. The indicator 12 is pressed against the housing 10 for positioning by the abutment of the positioning support end 124 and the positioning groove.

[0046] Specifically, refer to Figure 7 The positioning slots include a fault positioning slot 103b and a reset positioning slot 103a, the aforementioned being in Figure 1 When the circuit breaker is in the closed state, the abutment of the first reset boss 121 and the second reset boss 131 causes the indicator 12 to rotate to the working indicator area 126, and the positioning abutment end 124 to rotate into the reset positioning groove 103a. Meanwhile, when the circuit breaker is in the closed state... Figure 8 When the circuit breaker is in the normal open state, although the first reset boss 121 and the second reset boss 131 are separated, the positioning support end 124 is still located in the reset positioning groove 103a. This keeps the indicator 12 in the exposed position of the working indicator area 126, so that the indicator 12 is positioned in the working indicator area 126, indicating that the circuit breaker is in the normal working state.

[0047] Among them, such as Figure 2 , Figure 3 As shown, the indicator 12 is disposed in the housing 10 along the thickness direction T of the circuit breaker via the rotating shaft 120, so that the indicator 12 is rotatably connected to the housing 10. The first reset boss 121 and the first tripping boss 122 are located at the end of the rotating shaft 120 facing the locking member 16 along the thickness direction T. The elastic member 123 is oriented along the thickness direction T away from the locking member 16, that is, towards the positioning groove inside the housing 10.

[0048] When the circuit breaker trips due to a fault, such as Figure 9 , Figure 10 As shown, the electromagnetic trip unit 20 or the double metal 21 drives the locking member 16 to rotate, and the mechanism reset spring drives the mechanism seat 13 and the moving contact 17 to rotate, separating the moving contact 17 from the stationary contact 18. At this time, the tripping member 15 separates from the locking member 16, that is, the first abutting part 151 of the tripping member 15 separates from the second abutting part 161 of the locking member 16.

[0049] When the handle 11 resets, it causes the trip fastener 15 to reset. When the trip fastener 15 resets, it drives the locking fastener 16 to rotate, which in turn drives the indicator 12 to rotate. When the locking fastener 16 rotates, the indicator 12 has a first tripping boss 122, and the locking fastener 16 has a second tripping boss 162. Through the cooperation of the second tripping boss 162 and the first tripping boss 122, after a circuit breaker fault trip, the locking fastener 16 drives the indicator 12 to rotate until the fault indication area 125 is exposed outside the housing 10. In other words, when the locking fastener 16 rotates, it drives the first tripping boss 122 through the second tripping boss 162, thereby causing the indicator 12 to rotate along... Figure 3 Rotating clockwise causes the fault indication area 125 of the indicator 12 to rotate to the position of the window 104 of the housing 10, indicating that the circuit breaker is in a fault state.

[0050] At the same time, when the indicator 12 rotates, the positioning and holding end 124 of the indicator 12 rotates into the fault positioning groove 103b, so as to position the indicator 12 at the position where the fault indication area 125 is exposed outside the housing 10.

[0051] In addition, the indicator 12 also abuts against the fault stop position 102 on the housing 10. The fault stop position 102 is used to limit the indicator 12 in the circuit breaker fault state and also positions the indicator 12 in the position exposed in the fault indication area 125.

[0052] The reset of handle 11 causes the trip fastener 15 and locking fastener 16 to continue rotating until the circuit breaker is finally in the fault-free state, such as Figure 11As shown, the jump fastener 15 abuts against the locking fastener 16, the second release boss 162 separates from the first release boss 122, the positioning and holding end 124 is located in the fault positioning groove 103b, and the indicator 12 abuts against the fault stop position 102, so that the indicator 12 is held in the position where the fault indication area 125 is exposed outside the housing 10.

[0053] During the closing process after a fault, such as Figure 12 As shown, by operating the handle 11, the trip fastener 15 is rotated to abut against the locking fastener 16. At this time, the mechanism base 13 rotates to the position where the first reset boss 121 and the second reset boss 131 abut against each other. However, the indicator 12 rotates to the position where part of the fault indicator area 125 and part of the working indicator area 126 are simultaneously exposed through the window 104. The positioning abutment end 124 of the indicator 12 is located between the fault positioning groove 103b and the reset positioning groove 103a. When rotation continues, the circuit breaker can return to its original position. Figure 1 The normal closed state.

[0054] Furthermore, referring to Figure 1 The indicator 12 is positioned above the mechanism seat 13 inside the housing 10 along the height direction H of the circuit breaker. This arrangement allows the mechanism seat 13 and the locking element 16 to easily drive the indicator 12, ensuring the reliability of the drive.

[0055] The above description is merely an embodiment of this application and is not intended to limit the scope of protection of this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of protection of this application.

Claims

1. A circuit breaker, characterized in that, include: The housing (10) has a mechanism seat (13), an indicator (12), a locking element (16) and a jumper (15) rotatably disposed inside the housing (10). The indicator (12) has a fault indication area (125) and a working indication area (126). The housing (10) is provided with a handle (11). After a fault trip, the handle (11) resets the jump fastener (15), and the jump fastener (15) resets to drive the locking fastener (16) to rotate. The locking fastener (16) drives the indicator (12) to rotate so that the fault indication area (125) of the indicator (12) is exposed in the housing (10). The mechanism seat (13) drives the indicator (12) to reset to the working indication area (126) to expose the housing (10).

2. The circuit breaker according to claim 1, characterized in that, The indicator (12) has a first tripping boss (122), and the locking member (16) has a second tripping boss (162). Through the cooperation of the second tripping boss (162) and the first tripping boss (122), after the circuit breaker trips due to a fault, the locking member (16) drives the indicator (12) to rotate to the fault indication area (125) to expose the housing (10).

3. The circuit breaker according to claim 1, characterized in that, The jump fastener (15) is rotatably connected to the mechanism seat (13). The jump fastener (15) drives the mechanism seat (13) to rotate, and the mechanism seat (13) drives the indicator (12) to rotate. The indicator (12) has a first reset boss (121), and the mechanism seat (13) has a second reset boss (131). Through the cooperation of the second reset boss (131) and the first reset boss (121), when the circuit breaker is closed again, the mechanism seat (13) drives the indicator (12) to expose the working indicator area (126) of the indicator (12) to the housing (10).

4. The circuit breaker according to claim 1, characterized in that, The indicator (12) is also provided with an elastic element (123), the elastic element (123) is provided with a positioning support end (124), and the housing (10) is provided with a positioning groove. The indicator (12) is pressed against the housing (10) for positioning by the abutment of the positioning support end (124) and the positioning groove.

5. The circuit breaker according to claim 4, characterized in that, The positioning slot includes a fault positioning slot (103b) and a reset positioning slot (103a) arranged adjacent to each other. When the positioning support end (124) is located in the fault positioning slot (103b), the fault indication area (125) of the indicator (12) is exposed in the housing (10); when the positioning support end (124) is located in the reset positioning slot (103a), the working indication area (126) of the indicator (12) is exposed in the housing (10).

6. The circuit breaker according to claim 1, characterized in that, The inner wall of the housing (10) is provided with a reset stop position (101) and a fault stop position (102). The indicator (12) is located between the reset stop position (101) and the fault stop position (102). The reset stop position (101) is used to abut against the indicator (12) when the indicator (12) is reset, so as to limit the reset of the indicator (12). The fault stop position (102) is used to limit the indicator (12) when the circuit breaker is in a fault state and the indicator (12) rotates to abut against the fault stop position (102).

7. The circuit breaker according to any one of claims 1 to 6, characterized in that, The indicator (12) includes a rotating shaft (120), which is rotatably connected to the housing (10) via the rotating shaft (120). A first reset boss (121) and a first tripping boss (122) are located at one end of the rotating shaft (120) facing the locking member (16) along the thickness direction (T) of the circuit breaker. An elastic member (123) is connected to the rotating shaft (120) and is located at one end away from the locking member (16) along the thickness direction (T) of the circuit breaker.

8. The circuit breaker according to any one of claims 1 to 6, characterized in that, The indicator (12) is located above the mechanism seat (13) inside the housing (10) along the height direction (H) of the circuit breaker.

9. The circuit breaker according to any one of claims 1 to 6, characterized in that, The trip fastener (15) has a first abutting part (151), and the locking fastener (16) has a second abutting part (161). When the circuit breaker is closed, the trip fastener (15) and the locking fastener (16) abut against each other through the first abutting part (151) and the second abutting part (161). After the circuit breaker trips due to a fault, the trip fastener (15) and the locking fastener (16) separate through the first abutting part (151) and the second abutting part (161).

Images