Circuit breaker with indication function

Abstract

The utility model discloses a circuit breaker with an indication function, which utilizes the characteristic that a thermosensitive bimetallic strip suddenly jumps when being heated to cut off a power supply when a circuit is abnormal, and utilizes a spring to push out a blocking part to prevent the thermosensitive bimetallic strip from automatically resetting, so as to avoid secondary accidents caused by electrification under the condition that the circuit is not overhauled completely. Meanwhile, the indicating part outside the upper cover is synchronous with the blocking part, and the indicating part makes corresponding indication when the blocking part is pushed out.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of electrical equipment, specifically is a circuit breaker with indicating function. BACKGROUND

[0002] The circuit breaker is a switch device that can close, carry and open the current under normal circuit conditions and can close, carry and open the current under abnormal circuit conditions, and is an indispensable component in the power supply system of a ship. When overloading, short circuit or leakage occurs in the circuit, the circuit breaker can automatically cut off the power supply to ensure the safety of equipment and personnel. Some circuit breakers are designed in various types by using the characteristics of thermal bimetallic strip that jumps when heated, but it cannot be determined whether the thermal bimetallic strip is in which state and whether it has been reset after the thermal bimetallic strip jumps. SUMMARY

[0003] The utility model provides a circuit breaker with indicating function in view of prior art deficiency. This kind of circuit breaker utilizes the characteristics of thermal bimetallic strip that jumps when heated, disconnects the power supply when the circuit is abnormal, and pushes out the blocking component by using the spring to prevent the thermal bimetallic strip from resetting automatically, so as to prevent the power supply from causing another accident in the case that the circuit has not been repaired, and the upper cover external indicating component is synchronous with the blocking component, and the indicating component makes corresponding indication when the blocking component is pushed out.

[0004] In order to solve the above technical problems, the present invention is solved through the following technical solutions: A circuit breaker with an indication function, comprising a shell and an upper cover, wherein the outer side of the shell is provided with a terminal A and a terminal B, the terminal A passes through the shell and is connected to a thermal bimetallic strip inside the shell, the thermal bimetallic strip is fixed by a support rod, the terminal B passes through the shell and is fixed to a metal connecting cross bar, the metal connecting cross bar is rotatably connected to a metal rod, a torsion spring is compressed between the terminal B and the metal rod, the end of the thermal bimetallic strip away from the terminal A contacts a blocking component, the blocking component compresses a spring on the shell wall, the blocking component is fixed to a lever, a strip groove is opened on the upper cover, the lever passes through the strip groove, a switch hole is provided on the upper cover, a limit plate is provided on the inner side of the upper cover, a push switch passes through the switch hole, facing the metal rod, and a limit protrusion is provided on the side of the push switch. When controlling the push switch to close the circuit, the push switch is pressed until the limit protrusion exceeds the position of the limit plate, and then the push switch is rotated so that the limit protrusion overlaps the limit plate. The push switch pushes the metal rod downward toward the thermosensitive bimetallic strip. When controlling the push switch to disconnect the circuit, the push switch is rotated until the limit protrusion is offset from the limit plate. Under the action of the torsion spring, the metal rod pushes out of the push switch. With this structure, under normal use, the blocking component is withdrawn to the side of the thermosensitive bimetallic strip, and the thermosensitive bimetallic strip presses the blocking component. At this time, the position of the lever in the strip groove is normal. During use, pressing the push switch connects the metal rod to the thermosensitive bimetallic strip. When a circuit anomaly occurs, the thermal bimetallic strip overheats and suddenly trips. At this point, the spring pushes the blocking component between the thermal bimetallic strip and the metal rod. The position of the lever in the slot corresponds to the position it was in when the anomaly occurred. Therefore, the position of the lever in the slot can be used to determine the circuit breaker's current state. Furthermore, until the thermal bimetallic strip fully recovers, the blocking component cannot return to its normal position, further ensuring safety.

[0005] In the above technical solution, preferably, recessed grooves are left inside the upper cover at both ends of the strip-shaped slot, and an indicator component is embedded in the recessed groove. The indicator component has a hole at its center, and the lever passes through the hole. The indicator component has different indicator marks at both ends of the hole. With this structure, the lever's position in the strip-shaped slot varies depending on the circuit breaker's state, and the indicator component is moved to reveal different indicator marks in the strip-shaped slot, making it easier to identify different circuit breaker states.

[0006] In the above technical solution, preferably, the switch hole is circular, the push switch is cylindrical, and the push switch extends out of the top of the upper cover and is provided with a raised knob. This structure makes it more convenient to bear force during rotation.

[0007] In the above technical solution, preferably, the limit protrusions on the push switch are symmetrical protrusions on both sides of a cylinder. With this structure, when the torsion spring pushes the metal rod to support the push switch, the force is evenly distributed on the push switch.

[0008] In the above technical solution, preferably, the upper cover and the outer shell are fixed by rivets.

[0009] In the above technical solution, preferably, the shell is a cuboid.

[0010] Compared with the prior art, the present invention has the following beneficial effects: the circuit breaker with an indication function can more clearly indicate the state of the circuit breaker. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 Schematic diagram of the internal structure of an embodiment of the present utility model.

[0012] Figure 2 This is a schematic diagram of the inner structure of the upper cover of an embodiment of the present utility model.

[0013] Figure 3 This is a schematic diagram of the cross-sectional structure of the upper cover of an embodiment of the present utility model.

[0014] Figure 4 This is a schematic diagram of the push switch structure of an embodiment of the present utility model.

[0015] Figure 5 It is a structural schematic diagram of an embodiment of the present utility model. DETAILED DESCRIPTION

[0016] The present invention is described in further detail below with reference to the accompanying drawings and specific embodiments: Figures 1 to 5A circuit breaker with indication function, comprising a housing 1, an upper cover 2, the housing 1 is provided with a terminal post A 3 and a terminal post B 4, the terminal post A 3 passes through the housing 1 and is connected with a heat-sensitive bimetallic strip 5 inside the housing 1, the heat-sensitive bimetallic strip 5 is fixed by a support rod 6 which passes through the central position of the heat-sensitive bimetallic strip 5, the terminal post B 4 passes through the housing 1 and is fixed with a metal connecting cross bar 10, the metal connecting cross bar 10 is rotationally connected with a metal rod 12, a torsion spring 11 is compressed between the terminal post B 4 and the metal rod 12, the end of the heat-sensitive bimetallic strip 5 away from the terminal post A 3 is in contact with a blocking component 7, the blocking component 7 compresses a spring 9 against the wall of the housing 1, the blocking component 7 is fixed on a lever 8, a strip-shaped slot 19 is formed on the upper cover 2, the lever 8 passes through the strip-shaped slot 19, a switch hole 18 is formed on the upper cover 2, limit plates 13 are arranged on both sides of the switch hole 18 inside the upper cover 2, a press switch 15 passes through the switch hole 18 and faces the metal rod 12, limit protrusions 16 are arranged on the side of the press switch 15, the limit protrusions 16 are limited between the housing 1 and the metal rod 12, when the press switch 15 is used to control the closing of a circuit, the press switch 15 is pressed to the position of the limit protrusions 16 which exceeds the position of the limit plates 13, then the press switch 15 is rotated, the limit protrusions 16 overlap the limit plates 13, the press switch 15 is pressed against the metal rod 12 and moves downward to contact the heat-sensitive bimetallic strip 5. When the press switch 15 is used to control the opening of a circuit, the press switch 15 is rotated, the limit protrusions 16 are staggered with the limit plates 13, under the action of the torsion spring 11, the metal rod 12 pushes out the press switch 15. In the case of normal use, the blocking component 7 is withdrawn to the side of the heat-sensitive bimetallic strip 5, the heat-sensitive bimetallic strip 5 presses the blocking component 7, at this time, the position of the lever 8 in the strip-shaped slot 19 is the normal position. When an abnormality occurs in the circuit, the heat-sensitive bimetallic strip 5 is overheated and jumps, at this time, the blocking component 7 is pushed to the position between the heat-sensitive bimetallic strip 5 and the metal rod 12 under the action of the spring 9, the position of the lever 8 in the strip-shaped slot 19 is the position when the abnormality occurs. Thus, the state of the circuit breaker can be determined by the position of the lever in the strip-shaped slot.

[0017] In the embodiment, dark grooves 22 are left on both ends of the strip-shaped slot 19 inside the upper cover 2, indicating components 20 are embedded in the dark grooves 22, holes 21 are formed in the central positions of the indicating components 20, the lever 8 passes through the central holes 21 of the indicating components 20, different indicating marks are arranged on both ends of the central holes 21 of the indicating components 20. The position of the lever in the strip-shaped slot is different when the circuit breaker is in different states, the indicating components 20 are pushed to expose different indicating marks in the strip-shaped slot 19, which is more convenient for identifying the different states of the circuit breaker.

[0018] In the embodiment, the switch hole 18 is circular, the press switch 15 is a cylinder, the press switch 15 is provided with a protruding knob 17 which extends out of the top end of the upper cover 2, which is more convenient for force receiving when rotating.

[0019] In this embodiment, the limit protrusions 16 on the push switch 15 are symmetrical protrusions on both sides of the cylinder. With this structure, the force when the torsion spring 11 pushes the metal rod 12 to support the push switch 15 is evenly distributed on the push switch 15.

[0020] In this embodiment, the upper cover 2 and the outer shell 1 are fixed by rivets, and the outer shell 1 is a rectangular parallelepiped.

[0021] Compared with the prior art, the circuit breaker with an indication function of the present invention can more clearly indicate the state of the circuit breaker.

[0022] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as within the scope of protection of the present invention.

Claims

1. A circuit breaker with an indication function, characterized in that: The invention comprises a shell (1) and an upper cover (2), wherein a terminal A (3) and a terminal B (4) are provided on the outside of the shell (1), wherein the terminal A (3) passes through the shell (1) and is connected to a thermosensitive bimetallic strip (5) inside the shell (1), wherein the thermosensitive bimetallic strip (5) is fixed by a support rod (6), wherein the terminal B (4) passes through the shell (1) and is fixed to a metal connecting crossbar (10), wherein the metal connecting crossbar (10) is rotatably connected to a metal rod (12), wherein a torsion spring (11) is compressed between the terminal B (4) and the metal rod (12), wherein the thermosensitive bimetallic strip (5) is fixed to a metal connecting crossbar (10), wherein the metal connecting crossbar (10) is rotatably connected to a metal rod (12), wherein a torsion spring (11) is compressed between the terminal B (4) and the metal rod (12), and wherein the thermosensitive bimetallic strip (5) is fixed to a metal connecting crossbar (10), wherein the metal connecting crossbar (10) is rotatably connected to a metal rod (12), wherein the thermosensitive bimetallic strip (5) is fixed to a metal connecting crossbar (10), wherein the metal connecting crossbar (10) is rotatably connected to the ... ) is in contact with a blocking component (7) at one end away from the terminal A (3), and the blocking component (7) compresses a spring (9) on the wall of the housing (1). The blocking component (7) is fixed on a lever (8), and a strip groove (19) is provided on the upper cover (2). The lever (8) passes through the strip groove (19). A switch hole (18) is provided on the upper cover (2), and a limit plate (13) is provided on the inner side of the upper cover (2). A push switch (15) passes through the switch hole (18) and faces the metal rod (12). A limit protrusion (16) is provided on the side of the push switch (15).

2. A circuit breaker with an indication function according to claim 1, characterized in that: Dark grooves (22) are left inside the upper cover (2) at both ends of the strip groove (19), an indicating component (20) is embedded in the dark groove (22), a hole (21) is provided at the center of the indicating component (20), the shifting rod (8) passes through the center hole (21) of the indicating component (20), and the indicating component (20) is provided with different indicating marks on both sides of the center hole (21).

3. A circuit breaker with an indication function according to claim 1, characterized in that: The switch hole (18) is circular, the push switch (15) comprises a cylinder, and a protruding knob (17) is provided at the top end of the push switch (15) after it extends out of the upper cover (2).

4. A circuit breaker with an indication function according to claim 1, characterized in that: The limiting protrusions (16) on the push switch (15) are symmetrical protrusions on both sides of the cylinder.

5. The circuit breaker with an indication function according to claim 1, characterized in that: The upper cover (2) and the outer shell (1) are fixed by rivets.

6. A circuit breaker with an indication function according to claim 1, characterized in that: The housing (1) is a cuboid.

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