Fault indication mechanism of miniature circuit breaker

Abstract

The utility model relates to a fault indication mechanism of a miniature circuit breaker. The fault indication mechanism comprises a housing, a handle, a rocker arm, a jump pin, a re-buckle which is rotatably arranged in the rocker arm and is in linkage cooperation with the jump pin, a lock catch which is rotatably arranged on the rocker arm and is buckled with the re-buckle, and a U-shaped connecting rod which is connected between the handle and the jump pin. The shell is provided with a fault indicator board corresponding to the jump pin and the re-buckle, the fault indicator board is provided with a toggle sheet matched with the jump pin and the re-buckle, the jump pin is provided with a toggle block matched with the toggle sheet, the toggle block acts along with the jump pin and abuts against the toggle sheet, and the toggle block is provided with a button. The re-buckle is provided with a push block matched with the shifting piece, the push block acts along with the re-buckle and abuts against the shifting piece, and linkage matching of the fault indicating plate and the push block is formed. The utility model has the advantages of simple structure, stable and reliable performance, convenient assembly and reliable indication.

Description

Technical Field

[0001] The utility model relates to the technical field of circuit breakers, in particular to a fault indicating mechanism of a small circuit breaker. Background Art

[0002] Miniature circuit breakers, also known as miniature circuit breakers, are suitable for overload and short-circuit protection of AC 50 / 60Hz rated voltage 230 / 400V and rated current not exceeding 125A lines. They can also be used for infrequent line operation conversion under normal circumstances. Miniature circuit breakers are mainly used in various places such as industry, commerce, high-rise and residential buildings. Existing miniature circuit breakers have a leakage indication function. When a fault occurs in the main circuit, the fault indicator changes color following the action of the operating mechanism, thereby achieving the purpose of protecting the circuit. However, the fault indication mechanism of the existing miniature circuit breaker has a complex structural design, is relatively cumbersome to assemble, and has the defect of unreliable indication. Summary of the invention

[0003] The utility model aims to overcome the defects of the prior art and provide a fault indication mechanism for a miniature circuit breaker with simple structure, stable and reliable performance, convenient assembly and reliable indication.

[0004] To achieve the above-mentioned purpose, the utility model adopts a fault indication mechanism of a small circuit breaker, including a shell, a handle rotatably arranged on the shell, a rocker arm arranged in the shell, a trip button rotatably arranged in the rocker arm, a re-clip rotatably arranged in the rocker arm and linked with the trip button, a lock button rotatably arranged on the rocker arm and locked with the re-clip, and a U-shaped connecting rod connected between the handle and the trip button. A fault indication plate is arranged at the corresponding trip button and re-clip on the shell, a toggle piece matched with the trip button and the re-clip is arranged on the fault indication plate, a toggle block matched with the toggle piece is arranged on the trip button, the toggle block moves with the trip button and contacts the toggle piece, and constitutes a linkage cooperation between the fault indication plate and the toggle block, and a push block matched with the toggle piece is arranged on the re-clip, the push block moves with the re-clip and contacts the toggle piece, and constitutes a linkage cooperation between the fault indication plate and the push block.

[0005] The beneficial effect of the above structure is that a trip indicator that cooperates with the trip button and the re-catch is arranged in the housing, and the trip button and the re-catch can drive the fault indicator plate respectively, so as to realize the working status indication of the fault indicator plate. During operation, the handle drives the trip button to move, and the trip button drives the re-catch to engage with the lock button, the lock button and the re-catch are locked, and the contact bracket is driven to perform the closing action, and the toggle block of the trip button drives the fault indicator plate to move, so as to realize the closing indication of the fault indicator plate. When a short circuit occurs in the line, the top rod of the tripper of the circuit breaker electromagnetic system pushes the lock button to move, the lock button and the re-catch are unlocked, and the push block of the re-catch pushes the fault indicator plate to move, and the fault indicator plate slides to the fault indication position, so as to realize the fault indication of the small circuit breaker. Therefore, the fault indication mechanism of the small circuit breaker has the advantages of simple structure, stable and reliable performance, convenient assembly, and reliable indication.

[0006] In particular, one end of the toggle block is provided with an arcuate toggle surface that matches the toggle sheet, and the arcuate toggle surface moves with the toggle block and contacts the toggle sheet, and forms a linkage cooperation between the toggle sheet and the toggle block. The toggle block drives the toggle sheet through the arcuate toggle surface, which can avoid the toggle arcuate surface and the toggle sheet from getting stuck, and can ensure that the toggle block can reliably drive the fault indication plate to move, which is beneficial to improving the fault indication reliability of the fault indication mechanism.

[0007] In particular, an elastic card is provided on both sides of the fault indication plate, two positioning grooves matching with the elastic card are provided on both sides of the sliding groove of the housing, and the elastic card moves with the fault indication plate and reciprocates between the two positioning grooves. Two positioning grooves matching with the elastic card of the fault indication plate are provided in the housing, so that the fault indication plate can be reliably moved on the housing, which is beneficial to improving the fault indication reliability of the fault indication mechanism.

[0008] In particular, a limit groove is provided on the re-buckle corresponding to the jump buckle, and a driving part matched with the limit groove is provided on the jump buckle, and the driving part moves with the jump buckle and slides in the limit groove, and forms a linkage cooperation between the jump buckle and the re-buckle. The driving part of the jump buckle is slidably arranged in the limit groove of the re-buckle, so that the transmission of the jump buckle and the re-buckle can be ensured to be more reliable.

[0009] In particular, the re-buckle is provided with a buckling groove matched with the lock buckle, and the lock buckle is provided with a buckling protrusion matched with the buckling groove, and the buckling protrusion is engaged in the buckling groove, and constitutes a limit match between the re-buckle and the lock buckle. The buckling groove of the re-buckle is engaged with the buckling protrusion of the lock buckle, which can ensure that the re-buckle and the lock buckle can be reliably locked or unlocked. When a short circuit occurs in the line, the top rod of the tripper of the electromagnetic system of the circuit breaker pushes the lock buckle, the lock buckle is separated from the re-buckle, and the lock buckle and the re-buckle are unlocked, thereby realizing the rapid opening of the circuit breaker. When the line is overloaded, the bimetallic strip is deformed by heat, and the bimetallic strip moves the lock buckle through the pull rod, the lock buckle is separated from the re-buckle, and the lock buckle and the re-buckle are unlocked, thereby realizing the rapid opening of the circuit breaker. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 It is a three-dimensional diagram of the internal structure of an embodiment of the utility model.

[0011] Figure 2 This is a cross-sectional view of an embodiment of the utility model.

[0012] Figure 3 This is an exploded view of an embodiment of the utility model. DETAILED DESCRIPTION

[0013] like Figures 1 to 3As shown, the embodiment of the utility model is a fault indication mechanism of a small circuit breaker, including a housing 10, a handle 11 rotatably arranged on the housing 10, a rocker arm 12 arranged in the housing 10, a trip button 13 rotatably arranged in the rocker arm 12, a re-button 14 rotatably arranged in the rocker arm 12 and linked with the trip button 13, a lock button 15 rotatably arranged on the rocker arm 12 and engaged with the re-button 14, and a U-shaped connecting rod 16 connected between the handle 11 and the trip button 13. A fault indication plate 17 is arranged on the housing 10 corresponding to the trip button 13 and the re-button 14. The fault indicator plate 17 is provided with a toggle piece 171 that matches the jump button 13 and the re-button 14. The jump button 13 is provided with a toggle block 131 that matches the toggle piece 171. The toggle block 131 moves with the jump button 13 and contacts the toggle piece 171, and constitutes the linkage cooperation between the fault indicator plate 17 and the toggle block 131. The re-button 14 is provided with a push block 141 that matches the toggle piece 171. The push block 141 moves with the re-button 17 and contacts the toggle piece 171, and constitutes the linkage cooperation between the fault indicator plate 17 and the push block 141. A toggle arc surface 132 that matches the toggle piece 171 is provided at one end of the toggle block 131. The toggle arc surface 132 moves with the toggle block 131 and contacts the toggle piece 171, and constitutes the linkage cooperation between the toggle piece 171 and the toggle block 131. The toggle block drives the toggle plate by toggle the arc surface, which can avoid the toggle arc surface and the toggle plate from getting stuck, and can ensure that the toggle block can reliably drive the fault indication plate to move, which is beneficial to improving the fault indication reliability of the fault indication mechanism. An elastic card plate 172 is respectively provided on both sides of the fault indication plate 17, and two positioning grooves 102 that match the elastic card plate 172 are respectively provided on both sides of the sliding groove 101 of the housing 10. The elastic card plate 172 moves with the fault indication plate 17 and slides back and forth between the two positioning grooves 102. Two positioning grooves that match the elastic card plate of the fault indication plate are provided in the housing, so that the fault indication plate can be reliably moved on the housing, which is beneficial to improving the fault indication reliability of the fault indication mechanism.

[0014] like Figure 2As shown, a limiting groove 142 is provided on the re-buckle 14 corresponding to the jump buckle 13, and a driving part 133 matched with the limiting groove 142 is provided on the jump buckle 13. The driving part 133 moves with the jump buckle 13 and slides in the limiting groove 142, and constitutes the linkage cooperation between the jump buckle and the re-buckle. The driving part of the jump buckle is slidably arranged in the limiting groove of the re-buckle, so as to ensure that the transmission of the jump buckle and the re-buckle is more reliable. A snap-fitting groove 143 matched with the lock buckle 15 is provided on the re-buckle 14, and a snap-fitting protrusion 151 matched with the snap-fitting groove 143 is provided on the lock buckle 15. The snap-fitting protrusion 151 is engaged in the snap-fitting groove 143, and the snap-fitting protrusion 151 is engaged in the snap-fitting groove 143, and constitutes the limiting cooperation between the re-buckle 14 and the lock buckle 15. The snap groove of the re-snap is engaged with the snap protrusion of the lock, which can ensure that the re-snap and the lock can be reliably locked or unlocked. When a short circuit occurs in the line, the top rod of the tripper of the electromagnetic system of the circuit breaker pushes the lock, the lock is separated from the re-snap, and the lock and the re-snap are unlocked, thereby realizing the rapid opening of the circuit breaker. When the line is overloaded, the bimetallic strip is deformed by heat, and the bimetallic strip moves the lock through the pull rod, the lock is separated from the re-snap, and the lock and the re-snap are unlocked, thereby realizing the rapid opening of the circuit breaker.

[0015] A trip indicator that cooperates with the trip button and the re-clip is arranged in the housing. The trip button and the re-clip can drive the fault indicator plate respectively, so as to realize the working status indication of the fault indicator plate. During operation, the handle drives the trip button to move, and the trip button drives the re-clip to engage with the lock button. The lock button and the re-clip are locked, and the contact bracket is driven to perform the closing action. The toggle block of the trip button drives the fault indicator plate to move, so as to realize the closing indication of the fault indicator plate. When a short circuit occurs in the line, the top rod of the tripper of the electromagnetic system of the circuit breaker pushes the lock button to move, the lock button and the re-clip are unlocked, and the push block of the re-clip pushes the fault indicator plate to move, and the fault indicator plate slides to the fault indication position, so as to realize the fault indication of the small circuit breaker. Therefore, the fault indication mechanism of the small circuit breaker has the advantages of simple structure, stable and reliable performance, convenient assembly, and reliable indication.

Claims

1. A fault indication mechanism for a miniature circuit breaker, characterized in that: The utility model comprises a shell, a handle rotatably arranged on the shell, a rocker arm arranged in the shell, a jump buckle rotatably arranged in the rocker arm, a re-buckle rotatably arranged in the rocker arm and linked with the jump buckle, a lock buckle rotatably arranged on the rocker arm and locked with the re-buckle, and a U-shaped connecting rod connected between the handle and the jump buckle. A fault indicator plate is arranged on the shell corresponding to the jump buckle and the re-buckle, a toggle plate matched with the jump buckle and the re-buckle is arranged on the fault indicator plate, a toggle block matched with the toggle plate is arranged on the jump buckle, the toggle block moves with the jump buckle and contacts the toggle plate, and forms a linkage cooperation between the fault indicator plate and the toggle block, and a push block matched with the toggle plate is arranged on the re-buckle, the push block moves with the re-buckle and contacts the toggle plate, and forms a linkage cooperation between the fault indicator plate and the push block.

2. The fault indication mechanism of a miniature circuit breaker according to claim 1, characterized in that: One end of the toggle block is provided with an arcuate toggle surface matched with the toggle piece. The arcuate toggle surface moves with the toggle block and contacts the toggle piece, thereby forming a linkage match between the toggle piece and the toggle block.

3. The fault indication mechanism of a miniature circuit breaker according to claim 1 or 2, characterized in that: An elastic card is respectively arranged on both sides of the fault indicator plate, and two positioning grooves matching with the elastic card are respectively arranged on both sides of the sliding groove of the shell, and the elastic card moves with the fault indicator plate and slides back and forth between the two positioning grooves.

4. The fault indication mechanism of a miniature circuit breaker according to claim 1 or 2, characterized in that: A limiting groove is arranged on the re-buckle at the position corresponding to the jump buckle, and a driving part matched with the limiting groove is arranged on the jump buckle. The driving part moves with the jump buckle and slides in the limiting groove, and forms a linkage cooperation between the jump buckle and the re-buckle.

5. The fault indication mechanism of a miniature circuit breaker according to claim 1 or 2, characterized in that: The re-buckle is provided with a buckling groove matched with the lock buckle, and the lock buckle is provided with a buckling protrusion matched with the buckling groove. The buckling protrusion is engaged in the buckling groove and constitutes a limit fit between the re-buckle and the lock buckle.

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