Opening and closing indication mechanism for residual-current circuit breaker

Abstract

An opening and closing indication mechanism for a residual-current circuit breaker, comprising a push rod (12) rotatably arranged in a housing (10) and in linkage fit with a movable contact support (11), an opening and closing indication member (13) rotatably arranged in the housing (10), a reset member (14) rotatably arranged in the housing (10) at one side of the opening and closing indication member (13), and a torsion spring (15) arranged between the opening and closing indication member (13) and the reset member (14). An opening and closing indication plate (130) is arranged at one end of the opening and closing indication member (13) corresponding to an indication hole (100) of the housing (10), an opening indication mark (131) and a closing indication mark (132) are arranged on the opening and closing indication plate (130), one end of the push rod (12) is provided with a cambered surface protruding part (121) matching the opening and closing indication member (13), the opening and closing indication member (13) is provided with a cambered surface recess (133) matching the cambered surface protruding part (121), and the cambered surface protruding part (121) acts along with the push rod (12) and abuts against the cambered surface recess (133), so as to form linkage fit between the opening and closing indication member (13) and the push rod (12). The opening and closing indication mechanism for a residual-current circuit breaker has the advantages of being simple in structure, stable and reliable in performance, convenient to assemble and reliable in opening and closing indication.

Description

Opening and closing indication mechanism of leakage circuit breaker Technical Field

[0001] The utility model relates to the technical field of circuit breakers, and in particular to an opening and closing indicating mechanism for a leakage circuit breaker. Background Art

[0002] Currently, small circuit breakers, also known as miniature circuit breakers, are suitable for overload and short-circuit protection of AC 50 / 60Hz circuits with a rated voltage of 230 / 400V and a rated current not exceeding 125A. They can also be used for infrequent line switching under normal circumstances. Small circuit breakers are primarily used in various locations, including industrial, commercial, high-rise, and residential buildings. Small leakage circuit breakers are switches that automatically activate when the leakage current in a circuit exceeds a predetermined value, protecting people and electrical appliances. The structural design of the opening and closing indication mechanism of existing small leakage circuit breakers is relatively complex, with a large number of parts, and the opening and closing indication is unreliable. As a result, the opening and closing indication mechanism of such small leakage circuit breakers suffers from unreliable performance and inconvenient assembly. Technical issues

[0003] The purpose of the utility model is to overcome the defects of the prior art and provide an opening and closing indication mechanism for a leakage circuit breaker with a simple structure, stable and reliable performance, convenient assembly, and reliable opening and closing indication.

[0004] To achieve the above-mentioned purpose, the utility model adopts an opening and closing indication mechanism of a leakage circuit breaker, including a push rod rotatably arranged in a shell and linked with a moving contact bracket, an opening and closing indicator member rotatably arranged in the shell, a reset member rotatably arranged in the shell at one side of the opening and closing indicator member, and a torsion spring arranged between the opening and closing indicator member and the reset member. An opening and closing indication plate is provided at the indication hole of the shell corresponding to one end of the opening and closing indicator member, and an opening indication mark and a closing indication mark are respectively provided on the opening and closing indicator plate. One end of the push rod has an arc-shaped protrusion that cooperates with the opening and closing indicator member, and the opening and closing indicator member has an arc-shaped groove that cooperates with the arc-shaped protrusion. The arc-shaped protrusion moves with the push rod and abuts in the arc-shaped groove, and constitutes a linkage between the opening and closing indicator member and the push rod.

[0005] The beneficial effect of the above structure is that the arcuate raised portion of the push rod abuts against the arcuate groove of the opening / closing indicator. This abutment reduces the likelihood of jamming or blocking, and increases the reliability of the transmission between the push rod and the opening / closing indicator, thereby effectively improving the reliability of the opening / closing indication of the opening / closing indicator mechanism. During operation, the movable contact bracket drives the push rod to rotate, and the arcuate raised portion of the push rod abuts against the arcuate groove of the opening / closing indicator. The push rod drives the opening / closing indicator to perform the opening / closing indication action, thereby ensuring the opening / closing indication of the opening / closing mechanism. As a result, the opening / closing indication mechanism of the residual current circuit breaker has the advantages of a simple structure, stable and reliable performance, easy assembly, and reliable opening / closing indication.

[0006] In particular, the other end of the push rod has a driving arm that mates with the moving contact bracket. The moving contact bracket is provided with a bump that mates with the driving arm. The bump moves with the moving contact bracket and abuts against the driving arm, forming a coordinated connection between the push rod and the bump. The moving contact bracket drives the push rod via the driving arm, ensuring more reliable transmission between the moving contact bracket and the push rod.

[0007] In particular, a positioning rod is provided within the housing at a location corresponding to the reset member. The reset member is provided with a positioning sleeve that cooperates with the positioning rod. The positioning sleeve is sleeved over the positioning rod and provides a rotational connection between the reset member and the positioning rod. The positioning sleeve is provided with a positioning groove that engages with one end of the torsion spring. The reset member is provided on the positioning rod within the housing, thereby facilitating assembly of the reset member and the housing, resulting in higher assembly efficiency.

[0008] In particular, a positioning shaft is provided within the housing at a location corresponding to the opening / closing indicator. The opening / closing indicator is provided with a positioning hole that cooperates with the positioning shaft. The positioning shaft is inserted into the positioning hole and forms a rotational connection between the opening / closing indicator and the positioning shaft. A positioning boss is provided at a location corresponding to the positioning hole on the opening / closing indicator. The torsion spring is fitted onto the positioning boss. The opening / closing indicator plate is provided with a limit groove that engages with the other end of the torsion spring. The opening / closing indicator engages with the positioning shaft of the housing, thereby facilitating assembly of the opening / closing indicator and the housing, improving assembly efficiency, and ensuring that the opening / closing indicator can reliably rotate within the housing, providing more reliable opening / closing indication.

[0009] In particular, the reset member is provided with a tripping protrusion that cooperates with the tripping latch, and the tripping protrusion is provided with a driving surface that cooperates with the tripping latch. When the residual current circuit breaker trips, the tripping latch contacts the tripping protrusion of the reset member, causing the tripping to activate the reset member, which in turn activates the opening and closing indicator, thereby achieving the opening indication of the opening and closing mechanism. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] FIG1 is a perspective view of an embodiment of the present utility model.

[0011] FIG2 is a front view of an embodiment of the present utility model.

[0012] FIG3 is an exploded view of an embodiment of the present invention. DETAILED DESCRIPTION

[0013] As shown in Figures 1 to 3, the embodiment of the present invention is a switch-on / off indication mechanism for a leakage circuit breaker, comprising a push rod 12 rotatably disposed in a housing 10 and cooperating with a moving contact bracket 11, a switch-on / off indicator 13 rotatably disposed in the housing 10, a reset member 14 rotatably disposed in the housing 10 at a side corresponding to the switch-on / off indicator 13, and a torsion spring 15 disposed between the switch-on / off indicator 13 and the reset member 14. An switch-on / off indication plate 130 is disposed at one end of the switch-on / off indicator 13 corresponding to the indication hole 100 of the housing 10, and an opening / closing indication mark 131 and a closing indication mark 132 are respectively disposed on the switch-on / off indication plate 130. The push rod 12 is provided with a plurality of opening / closing indication marks 131 and a closing / closing indication mark 132. One end of the push rod 12 has an arcuate raised portion 121 that mates with the opening / closing indicator 13. The opening / closing indicator 13 has an arcuate groove 133 that mates with the arcuate raised portion 121. The arcuate raised portion 121 moves with the push rod 12 and abuts against the arcuate groove 133, forming a coordinated connection between the opening / closing indicator 13 and the push rod 12. The other end of the push rod 12 has a driving arm 122 that mates with the moving contact bracket 11. The moving contact bracket 11 is provided with a bump 111 that mates with the driving arm 122. The bump 111 moves with the moving contact bracket 11 and abuts against the driving arm 122, forming a coordinated connection between the push rod 12 and the bump 111. The moving contact bracket drives the push rod via the driving arm, ensuring more reliable transmission between the moving contact bracket and the push rod. A positioning rod 101 is provided within the housing 10 at a location corresponding to the reset member 14. The reset member 14 is provided with a positioning sleeve 141 that cooperates with the positioning rod 101. The positioning sleeve 141 is sleeved onto the positioning rod 101 and provides a rotational connection between the reset member 14 and the positioning rod 101. The positioning sleeve 141 is provided with a positioning slot 142 that engages with one end of the torsion spring 15. The reset member is provided on the positioning rod within the housing, which facilitates assembly of the reset member and the housing, improving assembly efficiency.

[0014] As shown in Figures 1 and 3, a positioning shaft 102 is provided within the housing 10 at a location corresponding to the opening / closing indicator 13. A positioning hole 134 is provided on the opening / closing indicator 13, which cooperates with the positioning shaft 102. The positioning shaft 102 is inserted into the positioning hole 134, forming a rotational connection between the opening / closing indicator 13 and the positioning shaft 102. A positioning boss 135 is provided on the opening / closing indicator 13 at a location corresponding to the positioning hole 134. The torsion spring 15 is mounted on the positioning boss 135. The opening / closing indicator plate 130 is provided with a limiting groove 136 that engages with the other end of the torsion spring 15. The opening / closing indicator engages with the positioning shaft of the housing, thereby facilitating assembly of the opening / closing indicator with the housing, improving assembly efficiency, and ensuring that the opening / closing indicator can rotate reliably within the housing, providing more reliable opening / closing indication. The reset member 14 is provided with a tripping protrusion 143 that cooperates with the tripping latch 16. The tripping protrusion 143 is also provided with a driving surface 144 that cooperates with the tripping latch 16. When the residual current circuit breaker trips, the tripping latch contacts the tripping protrusion of the reset member, causing the tripping to activate the reset member, which in turn activates the opening / closing indicator, thereby providing the opening indication of the opening / closing mechanism.

[0015] The arcuate raised portion of the push rod abuts against the arcuate groove of the opening / closing indicator. This contact prevents jamming and blocking, making transmission between the push rod and the opening / closing indicator more reliable, thereby effectively improving the reliability of the opening / closing indication of the opening / closing indicator mechanism. During operation, the moving contact bracket drives the push rod to rotate, and the arcuate raised portion of the push rod abuts against the arcuate groove of the opening / closing indicator. The push rod drives the opening / closing indicator to perform the opening / closing indication action, thereby ensuring the opening / closing indication of the opening / closing mechanism. Consequently, the opening / closing indication mechanism of the residual current circuit breaker has the advantages of a simple structure, stable and reliable performance, easy assembly, and reliable opening / closing indication.

Claims

1. A switch-on / off indicating mechanism for a leakage circuit breaker, characterized in that It comprises a push rod rotatably arranged in a shell and linked with a moving contact support, an opening and closing indicator rotatably arranged in the shell, a reset member rotatably arranged in the shell at one side of the opening and closing indicator, and a torsion spring arranged between the opening and closing indicator and the reset member. An opening and closing indicator plate is arranged at an indication hole of the shell at one end of the opening and closing indicator, and an opening indication mark and a closing indication mark are arranged on the opening and closing indicator plate respectively. One end of the push rod has an arc-surface protrusion matched with the opening and closing indicator, and the opening and closing indicator has an arc-surface groove matched with the arc-surface protrusion. The arc-surface protrusion moves with the push rod and contacts the arc-surface groove, and constitutes a linkage between the opening and closing indicator and the push rod.

2. The opening and closing indicating mechanism of the leakage circuit breaker according to claim 1 is characterized in that: the other end of the push rod has a driving arm that cooperates with the moving contact bracket, and the moving contact bracket is provided with a protrusion that cooperates with the driving arm. The protrusion moves with the moving contact bracket and abuts against the driving arm, and constitutes a linkage cooperation between the push rod and the protrusion.

3. The opening and closing indicating mechanism of the leakage circuit breaker according to claim 1 or 2, characterized in that A positioning rod is arranged at the corresponding reset member in the shell, and a positioning sleeve matching with the positioning rod is arranged on the reset member. The positioning sleeve is sleeved on the positioning rod and constitutes a rotational connection between the reset member and the positioning rod. A positioning groove is arranged on the positioning sleeve and engages with one end of the torsion spring.

4. The opening and closing indicating mechanism of the leakage circuit breaker according to claim 1 or 2, characterized in that A positioning shaft is arranged in the shell at a position corresponding to the opening and closing indicator, a positioning hole matching the positioning shaft is arranged on the opening and closing indicator, the positioning shaft is inserted into the positioning hole, and forms a rotational connection and cooperation between the opening and closing indicator and the positioning shaft, a positioning boss is arranged at a position corresponding to the positioning hole on the opening and closing indicator, the torsion spring is sleeved on the positioning boss, and a limiting groove engaging with the other end of the torsion spring is arranged on the opening and closing indicator plate.

5. The opening and closing indicating mechanism of the leakage circuit breaker according to claim 1 or 2, characterized in that The reset member is provided with a tripping protrusion matched with the tripping buckle, and the tripping protrusion is provided with a driving plane matched with the tripping buckle.

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