CN111463083A

CN111463083A - Circuit overload protection device

Info

Publication number: CN111463083A
Application number: CN202010268315.XA
Authority: CN
Inventors: 吴朋伟
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-04-08
Filing date: 2020-04-08
Publication date: 2020-07-28

Abstract

The invention discloses a circuit overload protection device which comprises a shell, wherein a left contact is arranged on the left side wall of the shell, a right contact is arranged on the right side wall of the shell, an adjusting mechanism is arranged in the shell and comprises an electromagnet fixedly connected to the inner wall of the shell, a corrugated pipe is fixedly connected to the inner wall of the shell, a plurality of metal rings are fixedly sleeved on the side wall of the corrugated pipe, a movable guide rod is fixedly connected to the lower end of the corrugated pipe, an insulating column is fixedly connected to the inner wall of the shell, a conductive column is fixedly connected to the lower end of the insulating column, a lantern ring is slidably sleeved on the side wall of the conductive column, a conductive core is fixedly embedded in the lantern ring, one end of the movable guide rod penetrates through the lantern ring and is fixedly connected with the conductive core. The invention can ensure that the electric appliance works in a normal current range and can also ensure the personal safety of people.

Description

Circuit overload protection device

Technical Field

The invention relates to the technical field of circuit equipment, in particular to a circuit overload protection device.

Background

Along with people's quality of life constantly becomes good, the consumer of ordinary family also can become more gradually, but when the consumer becomes more, people often can ignore the problem that the circuit transships, because the consumer of family's circuit generally all adopts parallel connection mode, and same circuit is too much with electrical apparatus, just is equivalent to resistance quantity increase, then the total resistance of circuit reduces, and the electric current increase of circuit causes the circuit to transship easily and burns out the consumer.

On the other hand, when the household circuit is used, under the condition that short circuit may occur, when the circuit is short-circuited, the current can be rapidly increased, so that electric equipment is burnt out, even a fire disaster is caused, economic loss is caused, and even the personal safety of people is threatened.

Therefore, it is necessary to design a circuit overload protection device to solve the above problems.

Disclosure of Invention

The invention aims to solve the defects in the prior art and provides a circuit overload protection device.

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

the utility model provides a circuit overload protection device, includes the casing, casing left side wall is equipped with left contact, casing right side wall is equipped with right contact, the inside adjustment mechanism that is equipped with of casing, adjustment mechanism includes fixed connection at shells inner wall's electro-magnet, inner wall fixedly connected with bellows on the casing, the fixed cover of bellows lateral wall is equipped with a plurality of becket, bellows lower extreme fixedly connected with removes the guide arm, inner wall fixedly connected with insulated column on the casing, insulated column lower extreme fixedly connected with leads electrical pillar, it is equipped with the lantern ring to lead electrical pillar lateral wall slip cap, the inside fixed electrically conductive core that inlays of lantern ring, remove guide arm one end and run through the lantern ring and with electrically conductive core fixed connection, remove guide arm other end fixedly connected with joint, lead electrical conductive pillar lower extreme fixedly connected with current conducting plate, the electro-magnet, The conductive plate is fixedly connected, and the joint is connected with the right contact through a lead;

the inside control mechanism that is equipped with of casing, control mechanism places the chamber, two including setting up two of leading electrical pillar inside place the equal sliding connection of intracavity wall and have the magnetism slider, lead the inside installation cavity that is equipped with of electrical pillar, the inside busbar that is equipped with of installation cavity, two place the chamber lateral wall that backs on the back and all be equipped with the opening, two the equal fixedly connected with stopper of the lateral wall that the magnetism slider was carried on the back mutually, two the stopper upper wall all is equipped with the draw-in groove, two the draw-in groove inner wall all has the fixture block through spring elastic connection.

Preferably, two of the placing cavities are located at one end of the conductive column close to the insulating column, and the mounting cavity is located between the two placing cavities.

Preferably, the limiting block is located in the opening, and the height of the limiting block is equal to that of the opening.

The invention has the following beneficial effects:

1. compared with the prior art, when the circuit is overloaded due to excessive electric equipment, the magnetism of the electromagnet is enhanced, the metal ring moves upwards to drive the conductive core to move upwards, the resistance of the conductive column is increased, the current of the circuit is reduced, the electric equipment can be ensured to work in a normal current range, and the electric equipment is protected;

2. compared with the prior art, when overload is caused by circuit short circuit, the current is increased sharply, the conductive strip is electrified to generate magnetic repulsion to move the two magnetic sliding blocks after the conductive core passes through the opening, the clamping block is popped to abut against the lantern ring, the conductive core can be prevented from moving downwards after the conductive core leaves the conductive column, the circuit is kept in an open circuit state continuously, the electric equipment can be protected from being burnt out, meanwhile, the circuit current is prevented from being overhigh, the temperature is increased, and the circuit is burnt out to cause fire, and the personal safety of people is ensured.

Drawings

Fig. 1 is a schematic structural diagram of a circuit overload protection apparatus according to the present invention;

FIG. 2 is an enlarged view of the structure A of the overload protection apparatus of the present invention;

fig. 3 is a schematic structural diagram of a short circuit of the circuit overload protection apparatus according to the present invention;

fig. 4 is an enlarged view of a structure at B of the circuit overload protection apparatus according to the present invention.

In the figure: the device comprises a shell 1, a left contact 2, an electromagnet 3, a corrugated pipe 4, a metal ring 5, a movable guide rod 6, a joint 7, a sleeve ring 8, a conductive core 9, a conductive plate 10, a right contact 11, a conductive column 12, an insulating column 13, a placement cavity 14, a mounting cavity 15, a conductive strip 16, a magnetic slider 17, a limiting block 18, a clamping groove 19, a clamping block 20 and an opening 21.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.

Referring to fig. 1-4, an overload protection device for a circuit comprises a housing 1, a left contact 2 is arranged on the left side wall of the housing 1, a right contact 11 is arranged on the right side wall of the housing 1, and the left contact 2 and the right contact 11 are both connected with electrical equipment in the circuit through wires.

The inside adjustment mechanism that is equipped with of casing 1, adjustment mechanism includes electro-magnet 3 of fixed connection at casing 1 inner wall, inner wall fixedly connected with bellows 4 on casing 1, bellows 4 lateral wall fixed cover is equipped with a plurality of becket 5, bellows 4 lower extreme fixedly connected with removes guide arm 6, inner wall fixedly connected with insulated column 13 on casing 1, the fixedly connected with of insulated column 13 lower extreme leads electrical pillar 12, insulated column 13 equals with the diameter of leading electrical pillar 12, it is equipped with lantern ring 8 to lead electrical pillar 12 lateral wall slip cover, lantern ring 8 is made by insulating material, lantern ring 8 is inside to be fixed to be inlayed and is equipped with electrically conductive core 9, electrically conductive core 9 contacts with leading electrical pillar 6 lateral wall, remove guide arm 6 one end and run through lantern ring 8 and with electrically conductive core 9 fixed connection, remove guide arm 6 other end fixedly connected with joint 7, it has electrically conductive plate, The conductive plate 10 is fixedly connected, and the joint 7 is connected with the right contact 11 through a lead;

the inside control mechanism that is equipped with of casing 1, control mechanism places chamber 14 including setting up at leading the inside two of electrical pillar 12, two place chamber 14 and are located the one end that leads electrical pillar 12 to be close to insulated column 13, two equal sliding connection in chamber 14 inner walls of placing have magnetic slider 17, lead the inside installation cavity 15 that is equipped with of electrical pillar 12, installation cavity 15 is located two and places between the chamber 14, the inside busbar 16 that is equipped with of installation cavity 15, two lateral walls of placing chamber 14 mutually on the back all are equipped with opening 21, two equal fixedly connected with stopper 18 of lateral wall that magnetic slider 17 mutually on the back mutually, stopper 18 is located opening 21, stopper 18 highly equals with opening 21, two stopper 18 upper walls all are equipped with draw-in groove 19, two draw-in groove 19 inner walls all have fixture block 20 through spring elastic connection, under the initial.

When the electromagnetic switch is used, if the circuit is overloaded due to excessive electric consumption, the current in the circuit is increased, so that the magnetism of the electromagnet 3 is enhanced, the magnetic field intensity of the electromagnet 3 is gradually increased, according to lenz's law (the effect of induced current always counteracts the cause of induced current), the metal ring 5 moves towards the direction with weak magnetic field intensity in order to inhibit the increase of magnetic flux, namely moves upwards, and drives the corrugated pipe 4 to contract, the corrugated pipe 4 contracts to drive the moving guide rod 6 to move upwards, and further drives the lantern ring 8 and the conductive core 9 to move upwards, after the conductive core 9 moves upwards, the length of the conductive column 12 connected into the circuit is increased, so that the resistance of the conductive column 12 connected into the circuit part is increased, the current of the circuit is reduced, electric equipment is prevented from being damaged due to excessive current, and after the current of the circuit is reduced, the metal ring 5 moves downwards, and then the lantern ring 8 and the conductive core 9 are driven to move downwards, so that the resistance of the part, connected into the circuit, of the conductive column 12 is reduced, and the circuit current is increased.

The device changes the resistance of the part of the conductive column 12, which is connected with the circuit, through the up-and-down movement of the conductive core 9, thereby changing the current of the circuit, ensuring that the current of the circuit is kept in a range suitable for the electric appliance to work, and being worthy of notice that the amplitude of the current change caused by the overload of the electric appliance is limited, and the conductive core 9 can not move to exceed the upper end of the conductive column 12.

If the circuit is overloaded due to a short circuit, the current will increase to a greater extent rapidly when the circuit is shorted, and the conductive core 9 moves up to the point where the upper end of the conductive post 12 is about to leave the conductive post 12 (at which point the collar 8 has passed through the opening), at which point the conductive post 12 is fully connected to the circuit, and the current passing through the conductive strip 16 will cause the conductive strip 16 to become magnetic, and the conductive bar 16 and the two magnetic sliders 17 repel each other in the same polarity, the magnetic sliders 17 are moved to the opening 21 by the repulsive force, and the limit block 18 is pushed out of the opening, under the action of the elastic force of the spring, the latch 20 is ejected out of the latch slot 19, and after the conductive core 9 completely leaves the conductive post 12, the circuit is broken, but since the latch 20 abuts against the lower wall of the collar 8, the collar 8 does not fall down, therefore, the circuit is always in an open circuit state, the electric appliance can be prevented from being burnt out due to the short circuit of the circuit, and the condition of intermittent short circuit cannot be caused due to self recovery.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.

Claims

1. An overload protection device for a circuit, comprising a housing (1), characterized in that: the novel corrugated pipe connector is characterized in that a left contact (2) is arranged on the left side wall of the shell (1), a right contact (11) is arranged on the right side wall of the shell (1), an adjusting mechanism is arranged inside the shell (1) and comprises an electromagnet (3) fixedly connected to the inner wall of the shell (1), a corrugated pipe (4) is fixedly connected to the inner wall of the shell (1), a plurality of metal rings (5) are fixedly sleeved on the side wall of the corrugated pipe (4), a movable guide rod (6) is fixedly connected to the lower end of the corrugated pipe (4), an insulating column (13) is fixedly connected to the upper inner wall of the shell (1), a conductive column (12) is fixedly connected to the lower end of the insulating column (13), a lantern ring (8) is sleeved on the side wall of the conductive column (12) in a sliding manner, a conductive core (9) is fixedly embedded inside the lantern ring (8), one, the other end of the movable guide rod (6) is fixedly connected with a joint (7), the lower end of the conductive column (12) is fixedly connected with a conductive plate (10), two ends of the electromagnet (3) are respectively and fixedly connected with the left contact (2) and the conductive plate (10) through conducting wires, and the joint (7) is connected with the right contact (11) through conducting wires;

casing (1) inside control mechanism that is equipped with, control mechanism places chamber (14), two including setting up two inside placing chamber (14) of leading electrical pillar (12) place equal sliding connection of chamber (14) inner wall and have magnetic slider (17), it is equipped with installation cavity (15) to lead electrical pillar (12) inside, installation cavity (15) inside is equipped with conducting bar (16), two place the lateral wall that chamber (14) was carried on the back mutually and all be equipped with opening (21), two the equal fixedly connected with stopper (18) of lateral wall that magnetic slider (17) was carried on the back mutually, two stopper (18) upper wall all is equipped with draw-in groove (19), two draw-in groove (19) inner wall all has fixture block (20) through spring elastic connection.

2. A circuit overload protection apparatus according to claim 1, wherein: the two placing cavities (14) are located at one ends, close to the insulating column (13), of the conductive columns (12), and the mounting cavity (15) is located between the two placing cavities (14).

3. A circuit overload protection apparatus according to claim 1, wherein: the limiting block (18) is located in the opening (21), and the height of the limiting block (18) is equal to that of the opening (21).