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BR-112021012621-B1 - MINIATURE CIRCUIT BREAKER

BR112021012621B1BR 112021012621 B1BR112021012621 B1BR 112021012621B1BR-112021012621-B1

Abstract

MINIATURE CIRCUIT BREAKER. The invention relates to the field of low-voltage electrical appliances and, more particularly, to a miniature circuit breaker, which includes a circuit breaker housing, a push-button mechanism, an operating mechanism, a moving contact and a static contact, wherein the mechanism includes a support member, a buckle member, a locking member and a trip rod, the trip rod includes a trip rod connection end and a trip rod actuation end; when the miniature circuit breaker is in a trip state, the push-button mechanism is pressed to actuate the operating mechanism to actuate, the operating mechanism actuates the moving contact to be connected to the static contact and, meanwhile, the trip rod actuation end is moved to a position corresponding to the buckle member; The button mechanism is pressed again, the actuating end of the disengaging rod actuates the buckle member to rotate, so that the buckle member is unlocked from the claw member, the operating mechanism actuates and engages the moving contact disconnected from the static contact, the circuit breaker (...).

Inventors

  • Kejun Lu
  • Xiangyi GU

Assignees

  • ZHEJIANG CHINT ELECTRICS CO.,LTD

Dates

Publication Date
20260310
Application Date
20191224
Priority Date
20181228

Claims (9)

  1. 1. Miniature circuit breaker comprising a circuit breaker housing (2), a push-button mechanism (1) slidingly arranged in the circuit breaker housing (2), an operating mechanism (5) arranged within the circuit breaker housing (2), a moving contact (56) and a static contact (560), the push-button mechanism (1) being actuatingly connected to the operating mechanism (5); The operating mechanism (5) comprises a transmission member (51), a second connecting rod (52), a support member (54), a buckle member (55), a claw member (53) and a first return spring (57). The transmission member (51) and the support member (54) are pivotally arranged in the circuit breaker housing (2) separately. The push-button mechanism (1) is actuatingly connected to the transmission member (51) by means of a first connecting rod (1050). The transmission member (51) is actuatingly connected to the claw member (53) by means of the second connecting rod (52). The claw member (53) and the buckle member (55) are pivotally arranged in the support member (54), respectively. The claw member (53) is in claw engagement with the buckle member (55), and the buckle member (55) is in actuation engagement with the support member. (54), the support member (54) is connected with the moving contact (56), the moving contact (56) is matched to the static contact (560) for use; the miniature circuit breaker being characterized in that the operating mechanism (5) also comprises a trip rod (15), the trip rod (15) comprises a trip rod connection end and a trip rod actuation end, the trip rod connection end is connected with the push button mechanism (1), the trip rod actuation end is in trip fitting with the buckle member (55); When the miniature circuit breaker is in a deactivation state, the push button mechanism (1) is pressed to actuate the operating mechanism (5) to actuate, the operating mechanism (5) actuates the moving contact (56) to be connected with the static contact (560) and, meanwhile, the actuating end of the deactivation rod is moved to a position corresponding to the buckle member (55); the push button mechanism (1) is pressed again, the actuating end of the deactivation rod (15) actuates the buckle member (55) to rotate, so that the buckle member (55) is unlocked from the claw member (53), the operating mechanism (5) actuates and actuates the moving contact (56) to be disconnected from the static contact (560), the miniature circuit breaker enters the deactivation state and, meanwhile, the deactivation rod (15) is returned to an initial position.
  2. 2. Miniature circuit breaker, according to claim 1, characterized in that the operating mechanism (5) further comprises a push-button mechanism return member (10a) and a guide protrusion (20) and a guide groove assembly which are combined with the trip rod (15) and arranged in the circuit breaker housing (2); The guide groove assembly comprises a first guide groove (21), a second guide groove (22), a third guide groove (23), a fourth guide groove (24) and a fifth guide groove (25), and the first guide groove (21), the second guide groove (22), the third guide groove (23), the fourth guide groove (24) and the fifth guide groove (25) are connected end to end to form the guide groove assembly surrounding the guide protrusion (20); when the miniature circuit breaker is in the deactivation state, the push button mechanism (1) is pressed, the drive end of the deactivation rod (15) passes through the first guide groove (21) and then the second guide groove (22) to enter the third guide groove (23), the miniature circuit breaker enters the activation state, the push button mechanism (1) is released, the push button mechanism return member (10a) drives the drive end of the deactivation rod The deactivation mechanism passes through the third guide groove (23) to enter the fourth guide groove (24) via the push button mechanism (1), and the deactivation rod drive end is in limit engagement with the guide protrusion (20); and the push button mechanism (1) is pressed again, the push button mechanism (1) drives the operating mechanism (5) to act through the deactivation rod drive end, the operating mechanism (5) is bent, the operating mechanism (5) drives the push button mechanism (1) to return, and the push button mechanism (1) drives the deactivation drive end to pass through the fourth guide groove (24) and then the fifth guide groove (25) to enter the first guide groove (21), so that the miniature circuit breaker enters the deactivation state.
  3. 3. Miniature circuit breaker, according to claim 1, characterized in that the push-button mechanism (1) comprises a push-button head (10), a push-button body (11) and the first connecting rod (1050), the push-button head (10) is disposed at one end of the push-button body (11) and projects out of the circuit breaker housing (2), one end of the first connecting rod (1050) is connected to the push-button body (11), the other end of the first connecting rod (1050) is in actuation engagement with the operating mechanism (5), when the miniature circuit breaker is in the deactivation state, the push-button mechanism (1) is pressed and the operating mechanism (5) is actuated to act by the first connecting rod (1050) to activate the miniature circuit breaker.
  4. 4. Miniature circuit breaker, according to claim 2, characterized in that the first guide groove comprises a lower surface of the first guide groove, the second guide groove comprises a second lower surface of the guide groove, the third guide groove comprises a third lower surface of the guide groove, the fourth guide groove comprises a fourth lower surface of the guide groove, and the fifth guide groove comprises a fifth lower surface of the guide groove; The second lower surface of the guide groove is an inclined plane; one end of the second lower surface of the guide groove connected to the first lower surface of the guide groove is level with the first lower surface of the guide groove; one end of the second lower surface of the guide groove connected to the third guide groove is higher than the first lower surface of the guide groove and higher than the third lower surface of the guide groove; the fourth lower surface of the guide groove is lower than the third lower surface of the guide groove; the fifth lower surface of the guide groove is an inclined plane; one end of the fifth lower surface of the guide groove connected to the fourth lower surface of the guide groove is level with the fourth lower surface of the guide groove; and one end of the fifth lower surface of the guide groove connected to the first guide groove is higher than the fourth lower surface of the guide groove and higher than the first lower surface of the guide groove.
  5. 5. Miniature circuit breaker, according to claim 4, characterized in that a step structure is arranged in a joint between the second lower surface of the guide groove and the third lower surface of the guide groove, a step structure is arranged in a joint between the third lower surface of the guide groove and the fourth lower surface of the guide groove, and a step structure is arranged in a joint between the fifth lower surface of the guide groove and the first lower surface of the guide groove.
  6. 6. Miniature circuit breaker, according to claim 2, characterized in that a cross-section of the guide protrusion (20) is a right triangle or an obtuse triangle, a right angle or an obtuse angle thereof is located at a joint between the fourth guide groove (24) and the fifth guide groove (25), an acute angle thereof is located at a joint between the second guide groove (22) and the third guide groove (23), another acute angle thereof corresponds to a joint between the first guide groove (21) and the second guide groove (22), a right-angled side or an obtuse-angled side thereof is disposed on a side of the fourth guide groove (24) and parallel to the fourth guide groove, another right-angled side or another obtuse-angled side is disposed on a side of the fifth guide groove (25) and is parallel to the fifth guide groove (25), a hypotenuse or a longer side thereof is disposed on a side of the second guide groove (22), the first guide groove (21) and the second groove guide (22) are located in a straight line and the third guide groove (23) is located on a lower side of the guide protrusion (20).
  7. 7. Miniature circuit breaker according to claim 1 characterized in that, wherein the buckle member (55) comprises a first buckle member arm (550) and a second buckle member arm (551), a free end of the first buckle member arm (550) is in claw engagement with the claw member (53), and the second buckle member arm (551) is in drive engagement with the drive end of the trip rod trip rod (15).
  8. 8. Miniature circuit breaker, according to claim 7, characterized in that the buckle member (55) further comprises a buckle member extension (553), one end of the buckle member extension (553) is connected with the second buckle member arm (551) and the other end of the buckle member extension is in drive engagement with the drive end of the trip rod trip rod (15).
  9. 9. Miniature circuit breaker, according to claim 2, characterized in that the return element of the push-button mechanism (10a) is an elastic element, one end of which is fixedly connected to the circuit breaker housing (2) and the other end of which is in actuation engagement with the push-button mechanism (1) to provide the push-button mechanism (1) with a counterforce in a deactivation return direction.

Description

TECHNICAL FIELD [0001] The present invention relates to the field of low-voltage electrical equipment and, more particularly, to a miniature circuit breaker. STATE OF THE ART [0002] The use of a circuit breaker can effectively improve the safety and reliable operation of an electrical device. In order to meet the installation needs of different electrical devices, a miniature circuit breaker, as an important type of circuit breaker, has various structures and tends to be miniaturized as a whole. An existing miniature circuit breaker presents the following problems. [0003] 1. An operating handle is used on most existing miniature circuit breakers to activate or deactivate the circuit breaker, and then a user activates or deactivates the circuit breaker via the operating handle, which requires a large operating space. With the increasingly compact installation cabinet space, it may be inconvenient for the user to activate or deactivate the circuit breaker via the operating handle. [0004] 2. Existing miniature circuit breakers that are switched on/off by a push-button mechanism are switched on by pressing the push-button mechanism and switched off by pulling the push-button mechanism. The user often exerts excessive force when pulling the push-button mechanism to switch off, so that the miniature circuit breaker can be pulled out of a circuit breaker mounting position, which is not conducive to ensuring the reliability and working stability of the circuit breaker installation and also presents a potential safety hazard. SUMMARY OF THE INVENTION [0005] The present invention aims to overcome the shortcomings of the prior art and provides a miniature circuit breaker, and the circuit breaker can be deactivated/activated by pressing a button mechanism. [0006] To achieve the above objective, the technical solutions used in the present invention are as follows. [0007] A miniature circuit breaker comprising a circuit breaker housing, a push-button mechanism arranged in a sliding manner in the circuit breaker housing, an operating mechanism arranged within the circuit breaker housing, a moving contact and a static contact, wherein the push-button mechanism is directly connected with the operating mechanism; The operating mechanism comprises a support member, a buckle member, a locking member, and a trip rod. The support member is articulated in the circuit breaker housing. The claw member and the buckle member are pivotally arranged on the support member, respectively. The support member is connected to the moving contact, and the moving contact is matched to the static contact for use. The trip rod comprises a trip rod connection end and a trip rod actuation end. The trip rod connection end is connected to the push-button mechanism, the trip rod actuation end is in a drive engagement with the buckle member, and the claw member is in a claw engagement with the buckle member. When the miniature circuit breaker is in a tripped state, the push button mechanism is pressed to actuate the operating mechanism. The operating mechanism actuates the moving contact to be connected to the static contact, and simultaneously, the trip rod actuating end is moved to a position corresponding to the buckle member. When the push button mechanism is pressed again, the trip rod actuating end actuates the buckle member to rotate, so that the buckle member is unlocked from the claw member. The operating mechanism actuates and causes the moving contact to be disconnected from the static contact. The miniature circuit breaker enters the tripped state, and simultaneously, the trip rod is returned to its initial position. [0008] Preferably, the operating mechanism further comprises a push-button mechanism return member and a guide protrusion and a guide groove assembly which are combined with the trip rod and arranged in the circuit breaker housing; The guide groove assembly comprises a first guide groove, a second guide groove, a third guide groove, a fourth guide groove, and a fifth guide groove, and the first guide groove, the second guide groove, the third guide groove, the fourth guide groove, and the fifth guide groove are connected end to end to form the guide groove assembly around the guide protrusion; when the miniature circuit breaker is in the off state, the push button mechanism is pressed, the drive end of the trip rod passes through the first guide groove and then the second guide groove to enter the third guide groove, the miniature circuit breaker enters the on state, the push button mechanism is released, the return member of the push button mechanism drives the drive end of the trip rod to pass through the third guide groove to enter the fourth guide groove through the push button mechanism, and the drive end of the trip rod is in limit engagement with the guide protrusion; When the button mechanism is pressed again, the button mechanism drives the operating mechanism to actuate through the deactivation rod drive end. The oper