CN114843145A - Circuit breaker - Google Patents

Abstract

The invention discloses a circuit breaker which is characterized by comprising an insulating shell (100), wherein a power supply inlet end (10) and a power supply outlet end (20) are oppositely arranged on the insulating shell (100), an operating handle (30) is arranged in the insulating shell (100) on one side of the power supply outlet end (20), one end of the operating handle (30) extends out of the insulating shell (100), a permanent magnet (40) is arranged between the operating handle (30) and the power supply inlet end (10), and the permanent magnet (40) drives a bulge (52) on a force arm (51) to extend out of the insulating shell (100) through a through hole (101) in the insulating shell (100) under the action of an external magnetizer or a permanent magnet.

Description

Circuit breaker

Technical Field

The invention relates to the technical field of low-voltage electric appliances, in particular to a breaker capable of reliably preventing mistaken insertion and extraction of closing.

Background

The circuit breaker is divided into a high-voltage circuit breaker and a low-voltage circuit breaker according to the application range of the circuit breaker, wherein the low-voltage circuit breaker is also called an automatic switch, and the low-voltage circuit breaker is an electric appliance which not only has the function of a manual switch, but also can automatically perform voltage loss, undervoltage, overload and short-circuit protection. It can be used for distributing electric energy, starting asynchronous motor infrequently, protecting power supply circuit and motor, etc., when they are seriously overloaded or short-circuited or under-voltage, etc. faults occur, it can automatically cut off circuit, its function is equivalent to the combination of fuse type switch and over-voltage and under-voltage thermal relay, etc., and after the fault current is cut off, it does not need to change the parts, so that it has been extensively used.

The circuit breaker is divided into: there are bayonet, fixed and drawer type, the use of bayonet circuit breaker can have the security that effectively improves electrical equipment use trade, structure along with bayonet circuit breaker also develops to various, generally adopt the shell fragment to lock bayonet circuit breaker in the rack in the overall arrangement of present traditional bayonet circuit breaker product when mounted position, if need follow the rack in the unblock take out the circuit breaker need rely on external force or additional tool, the operation is inconvenient, it is irrelevant with the on-off state of circuit breaker when taking out bayonet circuit breaker simultaneously, when circuit breaker closed state takes out the circuit breaker, the incident takes place easily.

Chinese patent application publication No. CN 107833799A discloses a fixing and unlocking mechanism for a plug-in circuit breaker. The plug-in circuit breaker adopts a button type structure, and when the button is pressed, the circuit breaker is switched on; when the button is pulled out, the breaker is opened. The locking and unlocking mechanism comprises a fastener, an unlocking piece and a torsion spring, the unlocking piece is abutted against the button in the state that the opening brake is not installed, the pressing button is prevented from being switched on by mistake, the unlocking piece and the button are in hard connection at the moment, and the locking and unlocking mechanism is easy to damage under large operating force; in the installation state, the unlocking piece is unlocked, the fastener is installed and locked, and the button is pressed to close the switch.

Disclosure of Invention

The invention aims to provide a reliable locking mechanism for preventing the circuit breaker from being inserted in a closing error mode and pulled out of the closing mode aiming at the technical defects of the existing circuit breaker.

In order to achieve the purpose, the invention adopts the following technical scheme.

The utility model provides a circuit breaker, includes insulating casing be provided with power inlet wire end and power outlet terminal in the insulating casing relatively be provided with operating handle in the insulating casing of power outlet terminal one side, operating handle's one end is stretched out insulating casing, operating handle with be provided with the permanent magnet between the power inlet wire end, the permanent magnet is under the effect of external magnetizer or permanent magnet, and the drive sets up the moving part in insulating casing and stretches out through-hole on the insulating casing.

Preferably, the moveable member comprises a pivoting arm with a projection.

Preferably, the moving part is provided with an open slot, and the permanent magnet is arranged in the open slot.

Preferably, the operating handle is provided with a driving portion, and the movable member is provided with a driven portion matched with the driving portion.

Preferably, the driving part is a convex structure.

Preferably, the moving member is provided with a limit closing portion, and the limit closing portion is abutted against a trip bar of the circuit breaker.

Preferably, the operating handle is a linear handle.

The invention has the following beneficial effects:

1. the circuit breaker can realize the installation locking function of the circuit breaker in the normal power-on use process only through a set of locking structure consisting of the moving part and the permanent magnet, prevent the circuit breaker from being separated from an installation cabinet due to an accident condition and also prevent the circuit breaker from being switched on when not being installed in place.

2. Under the state that the circuit breaker was not installed in place, the moving part was installed the rack and is restricted inside the circuit breaker, and the moving part is direct to be associated with tripping device, and the unable combined floodgate of circuit breaker when pressing operating handle, but operating handle can directly not be deadened, has protected operating handle and inside mechanical structure.

3. The permanent magnet is arranged in the moving part, when the circuit breaker is installed in place, the permanent magnet is automatically attracted by the ferromagnetic body or the permanent magnet, the moving part extends out of the through hole of the insulating shell, the moving part is far away from the trip rod, and closing unlocking and installation locking are completed.

Drawings

Fig. 1 is a schematic diagram of the opening of the circuit breaker according to the embodiment of the invention.

Fig. 2 is a schematic closing diagram of a circuit breaker according to an embodiment of the invention.

Fig. 3 is a schematic perspective view of a circuit breaker according to an embodiment of the invention.

FIG. 4 is a schematic view of a moving part according to an embodiment of the present invention.

Fig. 5 is a schematic structural view of an operating handle according to an embodiment of the present invention.

Detailed Description

Features and exemplary embodiments of various aspects of the present invention will be described in detail below. In the following detailed description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. It will be apparent, however, to one skilled in the art that the present invention may be practiced without some of these specific details. The following description of the embodiments is merely intended to provide a better understanding of the present invention by illustrating examples of the present invention. The present invention is in no way limited to any specific configuration and algorithm set forth below, but rather covers any modification, replacement or improvement of elements, components or algorithms without departing from the spirit of the invention. In the drawings and the following description, well-known structures and techniques are not shown in order to avoid unnecessarily obscuring the present invention.

The following describes a circuit breaker according to an embodiment of the present invention with reference to fig. 1 to 5.

The circuit breaker comprises an insulating shell 100, and a push rod 120, a gear 130, a driving element 60, a latch 70, a connecting rod 80, a movable contact 90 and a trip bar 110 which are arranged in the insulating shell 100, a power inlet terminal 10 and a power outlet terminal 20 are oppositely arranged on the insulating shell 100, an operating handle 30 is provided in the insulating housing 100 on the side of the power outlet terminal 20, one end of the operating handle 30 extends out of the insulating shell 100, a permanent magnet 40 is arranged between the operating handle 30 and the power supply inlet terminal 10, the permanent magnet 40 drives the movable element 50 arranged in the insulating shell 100 to rotate under the action of the external magnetizer or the permanent magnet, under the driving of the permanent magnet 40, the movable member 500 extends out of the insulating housing 100 through the through hole 101 of the insulating housing 100, and specifically, in this embodiment, the permanent magnet 40 is disposed in the opening groove 53 of the movable member 50. The movable member 50 is rotatably connected to the insulating housing 100 through a rotation shaft, closing limiting portions 55, which are matched with the driving portion 31 of the operating handle 30 and abut against the passive portion 54 and the trip bar 110 of the circuit breaker, are respectively disposed on both sides of the rotation shaft, and the movable member 50 further includes a force arm 51 on which a protrusion 52 is disposed on the force arm 51.

As shown in fig. 1 to fig. 5, two ends of the push rod 120 are respectively rotatably connected to the operating handle 30 and the gear 130, the gear 130 is synchronously rotatably connected to the driving member 60, the driving member 60 is rotatably connected to the latch 70, the latch 70 is rotatably connected to the movable contact 90 through the connecting rod 80, and the operating handle 30 can control the movable contact 90 to switch between a closing state and an opening state through the linkage among the push rod 120, the gear 130, the driving member 60, the latch 70 and the connecting rod 80.

As shown in fig. 1, when the circuit breaker is not installed in place, the cabinet (not shown) drives the protrusion 52 on the force arm 51 to retract into the insulating housing 100, and the closing limiting portion 55 of the movable element 50 abuts against the trip bar 110 of the circuit breaker, and when the operating handle 130 is pushed to perform a closing operation, the trip bar 110 abuts against the sliding buckle, so that the circuit breaker cannot be closed, and thus, the circuit breaker is prevented from being inserted by mistake.

As shown in fig. 2, when the circuit breaker is in the correct installation position, the permanent magnet 40 in the opening slot 53 of the movable element 50 is under the action of the external magnetizer or the permanent magnet, so as to drive the protrusion 52 on the force arm 51 to extend out of the insulating housing 100 through the through hole 101 of the insulating housing 100 and limit the position of the insulating housing 100 and a cabinet (not shown), and meanwhile, the closing limiting portion 55 of the movable element 50 is separated from the trip bar 110 of the circuit breaker, so that the state of preventing closing is released, and the circuit breaker is converted into the installation locking state, and thus the circuit breaker can perform normal closing and opening operations.

After the switching-off, the operating handle 30 is continuously pulled outwards to drive the breaker to release the installation locking state, that is, the driving portion 31 of the operating handle 30 contacts with the driven portion 54 of the moving part 50 to drive the permanent magnet 40 in the opening groove 53 of the moving part 50 to overcome the magnetic force of the external magnetizer or the permanent magnet, so that the protrusion 52 on the force arm 51 retracts into the insulating housing 100, and meanwhile, the switching-on limiting portion 55 on the moving part 50 abuts against the trip rod 110, so that the switching-on is prevented in the unlocking state.

According to the circuit breaker, the movable part is additionally arranged in the circuit breaker, the circuit breaker is smoothly and stably installed in a cabinet, and the circuit breaker cannot be taken out of the cabinet through the shell, the lead and the like; after the breaker is disconnected, the operating handle is pulled outwards to unlock the breaker from the cabinet, the breaker can be easily taken out from the cabinet by continuously pulling, and the use safety performance of the breaker is improved.

The foregoing is a further detailed description of the invention in connection with specific preferred embodiments, and the examples are described only to provide a better understanding of the invention by illustrating examples of the invention. The present invention is in no way limited to any specific configuration and algorithm set forth above, but rather covers any modification, replacement or improvement of elements, components or algorithms without departing from the spirit of the invention. For a person skilled in the art, without inventive effort, the figures can also be derived from these figures.

Claims (7)

1. The utility model provides a circuit breaker, its characterized in that includes insulating casing (100) be provided with power inlet wire end (10) and power outlet terminal (20) in insulating casing (100) relatively be provided with operating handle (30) in insulating casing (100) of power outlet terminal (20) one side, the one end of operating handle (30) is stretched out insulating casing (100), operating handle (30) with be provided with permanent magnet (40) between power inlet wire end (10), permanent magnet (40) under the effect of external magnetizer or permanent magnet, the drive sets up moving part (50) in insulating casing (100) and stretches out through-hole (101) on insulating casing (100).

2. A circuit breaker according to claim 1 wherein said movable member (50) comprises a pivoting arm (51) with a projection (52).

3. A circuit breaker according to claim 1, characterized in that said movable member (50) is provided with an open slot (53), and said permanent magnet (40) is disposed in said open slot (53).

4. A circuit breaker according to claim 1, wherein said operating handle (30) is provided with a driving portion (31), and said movable member (50) is provided with a passive portion (54) engaged with said driving portion (31).

5. A circuit breaker according to claim 4 wherein said actuating portion (31) is a raised structure.

6. A circuit breaker according to claim 3, characterized in that said movable element (50) is provided with a closing-limiting portion (55), said closing-limiting portion (55) interfering with a trip lever (110) of said circuit breaker.

7. A circuit breaker as claimed in claim 1, characterized in that said operating handle (30) is a linear-action handle.

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