CN214505406U

CN214505406U - Circuit overload and short circuit protector

Info

Publication number: CN214505406U
Application number: CN202022481732.0U
Authority: CN
Inventors: 钟荣良
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-10-30
Filing date: 2020-10-30
Publication date: 2021-10-26
Anticipated expiration: 2030-10-30

Abstract

The utility model provides a circuit overload and short circuit protection device, wherein a circuit breaker of the circuit overload and short circuit protection device is electrically connected with an alarm display and operation unit; the circuit breaker is electrically connected with a power supply through the first terminal and the second terminal to form a loop; the first conductive elastic sheet of the alarm display and operation unit is electrically connected with the first wiring terminal, the second conductive elastic sheet is electrically connected with the second wiring terminal, and the circuit board is respectively electrically connected with the first conductive elastic sheet, the second conductive elastic sheet and the photomask button; the LED lamp setting of light cover button is in power supply circuit, and the push rod that resets pops out when the circuit breaker open circuit, and power supply circuit circular telegram to control circuit breaker closed circuit when resetting, power supply circuit outage. The utility model discloses can show protection device's operating condition respectively through the light-emitting of light shield button, do not give out light, the user of being convenient for observes protection device's operating condition to the protection device of outage is triggered in the discovery fast, has realized the overhaul fast and the circular telegram of circuit.

Description

Circuit overload and short circuit protector

Technical Field

The utility model relates to a circuit protection field especially relates to a protection device of circuit overload and short circuit.

Background

Protection devices for current overloads or short circuits are often required to be installed during use of the circuit or appliance. When the protective device enters a set state with overload or short circuit, the relay in the protective device can be automatically released to disconnect the circuit, thereby effectively preventing the electric appliance or the circuit in the circuit from being damaged due to overload or short circuit in the set state. It is widely applied to the protection and monitoring of three-phase motors and other electrical appliances in the industries of machinery, metallurgy, building materials, chemical industry, textile industry and the like.

However, although the prior art protection device automatically breaks the circuit when short circuit or overload occurs, a plurality of protection devices are usually installed in reality due to self or work, and in order to protect the protection devices and prevent electric shock, the protection devices are often installed at high places or other places which are not easy to be contacted, and the states of the protection devices are often difficult to observe carefully. Therefore, the protection device triggering power failure is not easy to find when power failure occurs, and quick overhaul and power on of the circuit cannot be realized.

SUMMERY OF THE UTILITY MODEL

In order to overcome prior art not enough, the utility model provides a protection device of circuit overload and short circuit sets up the light shield button on protection device, through switching on and breaking off of push rod control power supply loop that resets, can show protection device's operating condition respectively through giving out light, not giving out light of light shield button, the user of being convenient for observes protection device's operating condition to discover the protection device who triggers the outage fast, realized the overhaul and the circular telegram of circuit, improved user experience.

In order to solve the above problem, the utility model discloses a technical scheme do: a circuit overload and short circuit protection device, comprising: the circuit breaker is electrically connected with the alarm display and operation unit; the circuit breaker comprises a first terminal and a second terminal, the circuit breaker is electrically connected with a power supply through the first terminal and the second terminal to form a loop, and the circuit breaker breaks the loop to realize circuit protection when detecting that the loop is overloaded or short-circuited; the alarm display and operation unit comprises a light shield button, a circuit board, a first conductive elastic sheet, a second conductive elastic sheet and a reset push rod, wherein the first conductive elastic sheet is electrically connected with the first wiring terminal, the second conductive elastic sheet is electrically connected with the second wiring terminal, and the circuit board is respectively electrically connected with the first conductive elastic sheet, the second conductive elastic sheet and the light shield button to form a power supply loop connected with the circuit breaker in parallel; the light shade button comprises an LED lamp, the LED lamp is arranged in the power supply loop, the reset push rod is connected with the circuit breaker, the circuit breaker is popped out when the circuit breaker is disconnected, the power supply loop is electrified, the circuit breaker is controlled when the circuit breaker is reset, the power supply loop is powered off, and the light emitting and the power off of the light shade button are controlled by popping out and resetting the reset push rod.

Further, the circuit breaker further comprises a tripping mechanism fixedly and electrically connected with the first terminal, the tripping mechanism comprises a movable contact, the movable contact is electrically connected with the second terminal, and the tripping mechanism controls the movable contact to be disconnected from the electrical connection with the second terminal to disconnect the loop when detecting that the loop is overloaded or short-circuited.

Further, the light shade button is electrically connected with the circuit breaker, and the tripping mechanism is controlled to be disconnected from the second terminal through the light shade button.

Furthermore, the tripping mechanism further comprises a base plate, the first conductive elastic sheet and the movable contact are respectively fixed on two sides of the base plate, a stationary contact is arranged at a position, opposite to the movable contact, of the second wiring end, and the tripping mechanism drives the movable contact to contact with or be far away from the stationary contact through the base plate to realize the conduction and the disconnection of the loop.

Furthermore, the protection device further comprises a base, a groove is formed in the base, the circuit breaker, the first conductive elastic sheet and the second conductive elastic sheet are arranged in the groove, and the first wiring end and the second wiring end are respectively arranged on two sides of the groove.

Furthermore, the protection device further comprises a contact plate and a waterproof pad, the waterproof pad seals the opening of the groove, and the contact plate is arranged on one side, facing the groove, of the waterproof pad and is electrically connected with the first conductive elastic sheet and the second conductive elastic sheet respectively.

Furthermore, the protection device also comprises a connecting piece and a cover plate, wherein one end of the connecting piece penetrates through the waterproof pad to be electrically connected with the contact plate, the other end of the connecting piece is electrically connected with the circuit board, and the circuit board is electrically connected with the first conductive elastic piece and the second conductive elastic piece through the connecting piece; the cover plate is arranged on one side, away from the waterproof pad, of the circuit board, the cover plate is in a shape corresponding to the opening of the groove, and the cover plate and the groove form a space for accommodating the waterproof pad and the contact plate of the circuit board.

Further, the connecting piece is a rivet.

Furthermore, the reset push rod and the light shield button are arranged on one side, far away from the circuit board, of the cover plate.

Furthermore, the bottom of the second conductive elastic sheet is electrically connected with the part of the second wiring end extending into the groove, the top end of the second conductive elastic sheet comprises a first connecting portion, a second connecting portion and a third connecting portion, the second connecting portion extends in the direction away from the side wall of the groove and is electrically connected with the bottom of the contact plate, and the first connecting portion and the third connecting portion are arranged on two sides of the second connecting portion and fixed between the side face of the contact plate and the inner wall of the groove.

Compared with the prior art, the beneficial effects of the utility model reside in that: set up the light shield button on protection device, through switching on and breaking off of push rod control power supply circuit that resets, can show protection device's operating condition respectively through the luminous of light shield button, do not give out light, the user of being convenient for observes protection device's operating condition to the protection device of outage is triggered in quick discovery, has realized the quick maintenance and the circular telegram of circuit, has improved user experience.

Drawings

Fig. 1 is a structural diagram of an embodiment of the protection device for circuit overload and short circuit according to the present invention;

fig. 2 is an exploded view of an embodiment of the overload and short circuit protection device of the present invention;

fig. 3 is a schematic partial structural diagram of an embodiment of the protection device for circuit overload and short circuit according to the present invention;

fig. 4 is a structural diagram of another embodiment of the protection device for circuit overload and short circuit according to the present invention;

fig. 5 is a structural diagram of an embodiment of the first conductive elastic piece and the second conductive elastic piece of the protection device for circuit overload and short circuit according to the present invention.

In the figure: 1. a first terminal; 2. a first conductive elastic sheet; 3. a tripping mechanism; 4. a second terminal; 5. A base; 6. a second conductive elastic sheet; 7. a contact plate; 8. a waterproof pad; 9. a circuit board; 10. a connecting member; 11. A light shield button; 12. resetting the push rod; 13. a cover plate; 14. a groove; 15. a first connection portion; 16. a third connecting portion; 17. a movable contact; 18. and a stationary contact.

Detailed Description

The present invention will be further described with reference to the accompanying drawings and the detailed description, and it should be noted that the embodiments or technical features described below can be arbitrarily combined to form a new embodiment without conflict.

Referring to fig. 1-5, fig. 1 is a structural diagram of an embodiment of a circuit overload and short circuit protection device according to the present invention; fig. 2 is an exploded view of an embodiment of the overload and short circuit protection device of the present invention;

fig. 3 is a schematic partial structural diagram of an embodiment of the protection device for circuit overload and short circuit according to the present invention; fig. 4 is a structural diagram of another embodiment of the protection device for circuit overload and short circuit according to the present invention, wherein fig. 1 and 4 are structural diagrams of the reset push rod in the protection device after reset and after pop-up respectively; fig. 5 is a structural diagram of an embodiment of the first conductive elastic piece and the second conductive elastic piece of the protection device for circuit overload and short circuit according to the present invention, and the protection device for circuit overload and short circuit according to the present invention is described in detail with reference to fig. 1-5.

In this embodiment, the protection device for circuit overload and short circuit includes: the circuit breaker is electrically connected with the alarm display and operation unit; the circuit breaker comprises a first terminal 1 and a second terminal 4, the circuit breaker is electrically connected with a power supply through the first terminal 1 and the second terminal 4 to form a loop, and the circuit breaker breaks the loop to realize circuit protection when detecting overload or short circuit of the loop; the alarm display and operation unit comprises a light shield button 11, a circuit board 9, a first conductive elastic sheet 2, a second conductive elastic sheet 6 and a reset push rod 12, wherein the first conductive elastic sheet 2 is electrically connected with a first wiring terminal 1, the second conductive elastic sheet 6 is electrically connected with a second wiring terminal 4, the circuit board 9 is respectively electrically connected with the first conductive elastic sheet 2, the second conductive elastic sheet 6 and the light shield button 11, and a power supply loop connected with the circuit breaker in parallel is formed; the light cover button 11 comprises an LED lamp, the LED lamp is arranged in a power supply loop, the reset push rod 12 is connected with the circuit breaker, the power supply loop is electrified when the circuit breaker is disconnected, the circuit breaker is controlled to be closed when reset, the power supply loop is powered off, and the light emitting and the power off of the light cover button 11 are controlled through the popping-up of the reset push rod 12 and the resetting. Wherein, because of the resistance of circuit breaker is far less than the resistance of LED lamp, circuit board 9 in the power supply circuit, when the closed circuit of circuit breaker (being the circuit breaker circular telegram), the circuit breaker is equivalent to the short circuit, and power supply circuit no current passes through, and the LED lamp is luminous, and circuit breaker open circuit (circuit breaker outage), and the current is through power supply circuit, and the LED lamp is luminous.

In other embodiments, a resistor may be additionally disposed in the power supply circuit to increase the resistance of the power supply circuit, thereby improving the effect of isolating the current of the power supply circuit after the circuit breaker is powered on.

In this embodiment, the circuit breaker further includes a trip mechanism 3 fixedly connected to the first terminal 1, the trip mechanism 3 includes a movable contact 17, the movable contact 17 is electrically connected to the second terminal 4, and the trip mechanism 3 controls the movable contact 17 to be electrically disconnected from the second terminal 4 to break the circuit when detecting an overload or a short circuit of the circuit.

In this embodiment, the trip mechanism 3 is a trip unit, and a manner of controlling the circuit breaker to be disconnected by the trip unit according to the overload or short circuit condition of the circuit belongs to the prior art, and is not described herein again.

In this embodiment, the trip mechanism 3 further includes a backing plate, the first conductive elastic sheet 2 and the movable contact 17 are respectively fixed on two sides of the backing plate, the stationary contact 18 is arranged at a position where the second terminal 4 is opposite to the movable contact 17, and the trip mechanism 3 drives the movable contact 17 to contact or be far away from the stationary contact 18 through the backing plate to realize the on and off of the loop.

In the embodiment, the light shade button 11 is electrically connected with the circuit breaker, and the tripping mechanism 3 is controlled to be disconnected from the second terminal 4 through the light shade button 11.

In this embodiment, the protection device further includes a base 5, a groove 14 is formed in the base 5, the circuit breaker, the first conductive elastic piece 2 and the second conductive elastic piece 6 are arranged in the groove 14, and the first terminal 1 and the second terminal 4 are respectively arranged on two sides of the groove 14. The bottoms of the first terminal 1 and the second terminal 4 extend into the groove 14, and the first conductive spring piece 2 and the backing plate are fixed on a structure of the first terminal 1 extending into the groove 14.

In a specific embodiment, the top end of the first conductive dome 2 extends to a direction close to the first terminal 1, and the top end is higher than the top end of the groove 14.

In the present embodiment, the groove 14 is a rounded rectangle, and the top end of the groove 14 is convex, and the first terminal 1 and the second terminal 4 are disposed outside the groove 14. In other embodiments, the groove 14 may also be circular, rectangular, prismatic, and other shapes, and the top of the groove 14 may also be flush with the base 5, which is not limited herein.

In this embodiment, the protection device further includes a contact plate 7 and a waterproof pad 8, the waterproof pad 8 closes the opening of the groove 14, the contact plate 7 is disposed on a side of the waterproof pad 8 facing the groove 14, and is electrically connected to the first conductive elastic sheet 2 and the second conductive elastic sheet 6 respectively.

In this embodiment, the waterproof pad 8 is a rubber pad, and the shape of the rubber pad corresponds to the opening of the groove 14, and the opening is closed to form a closed space.

In this embodiment, the contact plate 7 is fixed on the groove 14 at the outer side, and an arc opening is formed at the inner side, and the first conductive elastic piece 2 and the second conductive elastic piece 6 are respectively in contact with two ends of the arc opening.

In this embodiment, the protection device further includes a connector 10 and a cover plate 13, one end of the connector 10 penetrates through the waterproof pad 8 to be electrically connected with the contact plate 7, the other end of the connector 10 is electrically connected with the circuit board 9, and the circuit board 9 is electrically connected with the first conductive elastic piece 2 and the second conductive elastic piece 6 through the connector 10; the cover plate 13 is arranged on the side of the circuit board 9 far away from the waterproof pad 8, the shape of the cover plate 13 corresponds to the opening of the groove 14, and the cover plate 13 and the groove 14 form a space for accommodating the waterproof pad 8 and the contact plate 7 of the circuit board 9.

In this embodiment, the cover plate 13 is connected to the upper end of the groove 14 by screws, and in other embodiments, the cover plate 13 and the groove 14 may be connected by snapping, riveting, or other methods.

In the present embodiment, the connecting member 10 is a rivet. In other embodiments, the connecting member 10 may be a screw, a wire, or other conductive device.

In order to improve the waterproof effect, a waterproof adhesive may be applied or a waterproof tape may be adhered to the region of the connecting member 10 penetrating through the waterproof pad 8.

In the embodiment, the reset push rod 12 and the mask button 11 are arranged on one side of the cover plate 13 away from the circuit board 9, wherein a boss is arranged on the cover plate 13, the mask button 11 is arranged on one side of the boss away from the cover plate 13, and the reset push rod 12 is arranged on the side surface of the boss.

In this embodiment, the reset rod 12 may be connected to the trip mechanism 3, and the reset rod 12 is ejected by the action of the trip mechanism 3 to disconnect the movable contact 17 from the stationary contact 18. When the reset push rod 12 is reset, the reset push rod 12 drives the tripping mechanism 3 to reset in a mechanical transmission mode, so that the movable contact 17 is connected with the static contact 18.

In the present embodiment, the mask button 11 is fitted on the circuit board 9, the mask button 11 may be directly connected to the trip mechanism 3 or connected to the trip mechanism 3 through the circuit board 9, and when the mask button 11 is pressed, the mask button 11 triggers the trip mechanism 3 to operate, so that the movable contact 17 and the stationary contact 18 are separated from each other, and the circuit is opened.

In this embodiment, the bottom of the second conductive elastic sheet 6 is electrically connected to the portion of the second terminal 4 extending into the groove 14, the top end includes a first connecting portion 15, a second connecting portion and a third connecting portion 16, the second connecting portion extends in the direction away from the side wall of the groove 14 and is electrically connected to the bottom of the contact plate 7, the first connecting portion 15 and the third connecting portion 16 are disposed on two sides of the second connecting portion and fixed between the side surface of the contact plate 7 and the inner wall of the groove 14, and this way prevents the problem that the tripping mechanism 3 and the second conductive elastic sheet 6 are in contact to cause the abnormal operation of the protection device.

Has the advantages that: the utility model discloses the protection device of circuit overload and short circuit sets up the light shield button on protection device, through switching on and breaking off of push rod control power supply loop that resets, can show protection device's operating condition respectively through the giving out light, not giving out light of light shield button, the user of being convenient for observes protection device's operating condition to discover the protection device who triggers the outage fast, realized the quick maintenance and the circular telegram of circuit, improved user experience.

The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A circuit overload and short circuit protection device, comprising: the circuit breaker is electrically connected with the alarm display and operation unit;

the circuit breaker comprises a first terminal and a second terminal, the circuit breaker is electrically connected with a power supply through the first terminal and the second terminal to form a loop, and the circuit breaker breaks the loop to realize circuit protection when detecting that the loop is overloaded or short-circuited;

the alarm display and operation unit comprises a light shield button, a circuit board, a first conductive elastic sheet, a second conductive elastic sheet and a reset push rod, wherein the first conductive elastic sheet is electrically connected with the first wiring terminal, the second conductive elastic sheet is electrically connected with the second wiring terminal, and the circuit board is respectively electrically connected with the first conductive elastic sheet, the second conductive elastic sheet and the light shield button to form a power supply loop connected with the circuit breaker in parallel;

the light shade button comprises an LED lamp, the LED lamp is arranged in the power supply loop, the reset push rod is connected with the circuit breaker, the circuit breaker is popped out when the circuit breaker is disconnected, the power supply loop is electrified, the circuit breaker is controlled when the circuit breaker is reset, the power supply loop is powered off, and the light emitting and the power off of the light shade button are controlled by popping out and resetting the reset push rod.

2. The overload and short circuit protection device according to claim 1, wherein the circuit breaker further comprises a trip mechanism electrically connected to the first terminal, the trip mechanism comprising a movable contact electrically connected to the second terminal, the trip mechanism controlling the movable contact to electrically disconnect the second terminal to disconnect the circuit when the overload or short circuit of the circuit is detected.

3. The overload and short-circuit protection device according to claim 2, wherein the light shade button is electrically connected to the circuit breaker, and the tripping mechanism is controlled to disconnect the second terminal by the light shade button.

4. The overload and short circuit protection device according to claim 2, wherein the trip mechanism further comprises a pad, the first conductive spring and the movable contact are respectively fixed on two sides of the pad, a stationary contact is disposed at a position where the second terminal is opposite to the movable contact, and the trip mechanism drives the movable contact to contact with or be away from the stationary contact through the pad to achieve the on/off of the loop.

5. The overload and short circuit protection device of claim 1, further comprising a base, wherein the base is provided with a groove, the circuit breaker, the first conductive spring, and the second conductive spring are disposed in the groove, and the first terminal and the second terminal are disposed on two sides of the groove respectively.

6. The device for protecting circuit from overload and short circuit according to claim 5, further comprising a contact plate and a waterproof pad, wherein the waterproof pad closes the opening of the recess, and the contact plate is disposed on a side of the waterproof pad facing the recess and electrically connected to the first conductive resilient piece and the second conductive resilient piece, respectively.

7. The overload and short circuit protection device of claim 6, further comprising a connector and a cover plate, wherein one end of the connector passes through the waterproof pad and is electrically connected with the contact plate, the other end of the connector is electrically connected with the circuit board, and the circuit board is electrically connected with the first conductive elastic sheet and the second conductive elastic sheet through the connector;

the cover plate is arranged on one side, away from the waterproof pad, of the circuit board, the cover plate is in a shape corresponding to the opening of the groove, and the cover plate and the groove form a space for accommodating the waterproof pad and the contact plate of the circuit board.

8. The overload and short circuit protection device in accordance with claim 7, wherein the connecting member is a rivet.

9. The overload and short-circuit protection device for circuit as claimed in claim 7, wherein the reset push rod and the light shield button are arranged on the side of the cover plate far away from the circuit board.

10. The apparatus of claim 6, wherein the bottom of the second conductive resilient piece is electrically connected to a portion of the second terminal extending into the recess, and the top of the second conductive resilient piece includes a first connecting portion, a second connecting portion and a third connecting portion, the second connecting portion extends in a direction away from the side wall of the recess and is electrically connected to the bottom of the contact plate, and the first connecting portion and the third connecting portion are disposed on two sides of the second connecting portion and fixed between the side surface of the contact plate and the inner wall of the recess.