CN208908205U - A kind of novel overheat overcurrent power-off protection device - Google Patents

Abstract

The utility model discloses a kind of novel overheat overcurrent power-off protection devices; including PTC shell and installation card; PTC shell lower end is equipped with bimetal leaf; the bimetal leaf lower end is equipped with insulating paper; iron nail and movable contact are equipped between the bimetal leaf and insulating paper; the insulating paper lower end is equipped with bottom plate; stationary contact is equipped between the insulating paper and bottom plate; the bottom plate lower end is equipped with heater element PTC; the lower end the heater element PTC is connected with installation card, and PTC interior of shell lower end is welded with weld tabs.The present apparatus passes through electric current and temperature duplicate protection; make the PTC resistance value fired with the increase persistent fever of electric current; product is always held at protection point; only normality could can be just closed into the specified good reset temperature of the present apparatus in the case where artificial power-off; therefore; it can satisfy the safety real requirement of electronic apparatus, ensure property safety.

Description

A kind of novel overheat overcurrent power-off protection device

Technical field

The utility model relates to circuit protection device technical fields, more particularly to a kind of novel overheat overcurrent power-off protection Device.

Background technique

Currently, being increasingly stringenter both at home and abroad to electrical appliance and industry fever control terminal for Electrical Safety, and state It is interior to have enforceable safe qualification specification, the control temperature that the temperature control now circulated on the market be simple for electronic component Degree, temperature reach the condition limited, and temperature control just protects power-off, do not allow off-the-shelf hardware to damage.

Utility model content

The purpose of this utility model is to provide a kind of novel overheat overcurrent power-off protection devices, have practicability height, Highly-safe feature, solves the problems of the prior art.

To achieve the above object, the utility model provides the following technical solutions: a kind of novel overheat overcurrent power-off protection Device, including PTC shell and installation card, PTC shell lower end are equipped with bimetal leaf, and the bimetal leaf lower end is equipped with exhausted Edge paper is equipped with iron nail and movable contact between the bimetal leaf and insulating paper, the iron nail is through connection bimetal leaf one end, institute It states bimetal leaf and insulating paper is fixedly connected with by iron nail, the iron nail side is equipped with movable contact, and the insulating paper lower end is equipped with bottom Plate is equipped with stationary contact between the insulating paper and bottom plate, the stationary contact is fixedly connected on bottom plate upper end side, under the bottom plate End is equipped with heater element PTC, and the lower end the heater element PTC is connected with installation card, and the heater element PTC is located in installation card Portion, PTC interior of shell lower end are welded with weld tabs, and the weld tabs upper end connects bimetal leaf side, and the bimetal leaf inclines It tiltedly is placed in PTC interior of shell, the movable contact is located at stationary contact upper end side.

Preferably, the insulation voltage of the insulating paper is AC1800V.

Preferably, the insulating paper, movable contact and stationary contact upper end are equipped with silver layer, and the electric current that silver layer can bear 10A is normal Work 10000 times.

Preferably, the iron nail and bimetal leaf junction can bear the pulling force of 3KG, and stationary contact can be held with back plate connections By the pulling force of 3KG.

Preferably, the stationary contact and movable contact are electrically conductive.

Compared with prior art, the beneficial effects of the utility model are as follows:

The novel overheat overcurrent power-off protection device of the utility model works as temperature by electric current and temperature duplicate protection When not reaching the temperature of specified limitation, when electric current has exceeded the protective device rated current (such as 10A), it will be powered off Protection, when temperature reaches volume limit temperature when normal rated current works will power-off protection, and the present apparatus additional PTC hair Backing, the heat that the heat and temperature that can be generated with the electric current of product generate, can increase according to the ontology resistance value of PTC and generate heat Amount persistently allows the present apparatus to be in a kind of state of power-off protection, and only could be with this dress in the case where artificial power-off Normality can be just closed by setting specified good reset temperature, i.e. the PTC resistance value by firing, will with the increase persistent fever of electric current Product is always held at protection point, in this way it is avoided that finished product machine is damaged, if by equipment power cut-off, temperature controller can be with The reset condition connection that product itself is set resets to normality, therefore, can satisfy the safety real requirement of electronic apparatus, and The life property safety that can ensure user, allows the earth far from electrical fire calamity.

Detailed description of the invention

Fig. 1 is the exploded view of the utility model；

Fig. 2 is the assembling figure of the utility model.

In figure: 1, installation card；2, heater element PTC；3, bottom plate；4, stationary contact；5, insulating paper；6, iron nail；7, movable contact； 8, bimetal leaf；9, PTC shell；10, weld tabs.

Specific embodiment

The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are without making creative work Every other embodiment obtained, fall within the protection scope of the utility model.

A kind of novel overheat overcurrent power-off protection device referring to FIG. 1-2, including PTC shell 9 and installation card 1, PTC 9 lower end of shell is equipped with bimetal leaf 8, and bimetal leaf 8 itself is also to have resistance value, carries out selection according to the requirement of client, When load current is greater than 8 rated current of bimetal leaf, the bending then bimetal leaf 8 will generate heat, moment can carry out machine Open-circuit-protection is powered off, 8 lower end of bimetal leaf is equipped with insulating paper 5, and the insulation voltage of insulating paper 5 is AC1800V, can be very good to protect Hinder the security performance of entire protective device, iron nail 6 and movable contact 7 is equipped between bimetal leaf 8 and insulating paper 5, iron nail 6 is through company 8 one end of bimetal leaf is connect, bimetal leaf 8 is fixedly connected with insulating paper 5 by iron nail 6, and 6 side of iron nail is equipped with movable contact 7, iron nail 6 The pulling force that 3KG can be born with 8 junction of bimetal leaf, will not loosen at work, not fall off, stationary contact 4 and 3 junction of bottom plate The pulling force of 3KG can be born, stationary contact 4 is a conducting end above bottom plate 3, it can firmly be fixed together with bottom plate 3 very much, Product does not have any loosening when working, and will not fall off, and 5 lower end of insulating paper is equipped with bottom plate 3, between insulating paper 5 and bottom plate 3 Equipped with stationary contact 4, stationary contact 4 is fixedly connected on 3 upper end side of bottom plate, electric current is logical passed through by bottom plate 3,1 terminals of installation card it is double When sheet metal 8, its reverse bending can be made according to the resistance value of bimetal leaf 8 and the temperature set, separate the another of 3 wiring of bottom plate End, will instant cut-off open-circuit-protection, insulating paper 5, movable contact 7 and 4 upper end of stationary contact be equipped with silver layer, and silver layer can bear 10A's Electric current works normally 10000 times, and the service life does not damage, and stationary contact 4 and movable contact 7 are electrically conductive, and 3 lower end of bottom plate is equipped with heater element PTC2, the selection of heater element PTC2 is also the requirement of the requirement disconnecting circuit of more client to determine, after circuitry cuts, hair Thermal element PTC2 can make its fever with the temperature and electric current of product, and resistance value becomes larger, and can generate heat always, allow bimetal leaf 8 The state being closed originally will not be replied, the lower end heater element PTC2 is connected with installation card 1, and heater element PTC2 is located at installation card 1 Inside, can firmly fix, it is not allowed to loosen, and can guarantee the normal work of heater element PTC2, the weldering of 9 interior lower end of PTC shell It is connected to weld tabs 10,10 upper end of weld tabs connects 8 side of bimetal leaf, and 8 slant setting of bimetal leaf is inside PTC shell 9, outside PTC The one end of shell 9, bottom plate 3, installation card 1 as external contact air, can there is the function of antirust, and movable contact 7 is located on stationary contact 4 Hold side.

In summary: the novel overheat overcurrent power-off protection device of the utility model passes through electric current and the dual guarantor of temperature Shield, when temperature does not reach the temperature of specified limitation, such as 10A when electric current has exceeded the protective device rated current, it Will power-off protection, when temperature reaches volume limit temperature when normal rated current works will power-off protection, and the present apparatus is attached The PTC fever tablet added, the heat that the heat and temperature that can be generated with the electric current of product generate, can be according to the ontology resistance value of PTC Increase calorific value, persistently allows the present apparatus to be in a kind of state of power-off protection, and only could in the case where artificial power-off As the specified good reset temperature of the present apparatus can just be closed into normality, that is, through PTC resistance value firing as the increase of electric current is held Supervention heat, is always held at protection point for product, in this way it is avoided that finished product machine is damaged, if by equipment power cut-off, temperature Control device can reset to normality with the reset condition connection that product itself is set, and therefore, can satisfy the safety of electronic apparatus Real requirement, and can ensure the life property safety of user, allow the earth far from electrical fire calamity.

It should be noted that, in this document, relational terms such as first and second and the like are used merely to a reality Body or operation are distinguished with another entity or operation, are deposited without necessarily requiring or implying between these entities or operation In any actual relationship or order or sequence.Moreover, the terms "include", "comprise" or its any other variant are intended to Non-exclusive inclusion, so that the process, method, article or equipment including a series of elements is not only wanted including those Element, but also including other elements that are not explicitly listed, or further include for this process, method, article or equipment Intrinsic element.

While there has been shown and described that the embodiments of the present invention, for the ordinary skill in the art, It is understood that these embodiments can be carried out with a variety of variations in the case where not departing from the principles of the present invention and spirit, repaired Change, replacement and variant, the scope of the utility model is defined by the appended claims and the equivalents thereof.

Claims (5)

1. a kind of novel overheat overcurrent power-off protection device, including PTC shell (9) and installation card (1), it is characterised in that: institute It states PTC shell (9) lower end to be equipped with bimetal leaf (8), bimetal leaf (8) lower end is equipped with insulating paper (5), the bimetallic Iron nail (6) and movable contact (7) are equipped between piece (8) and insulating paper (5), the iron nail (6) is through connection bimetal leaf (8) one End, the bimetal leaf (8) are fixedly connected insulating paper (5) by iron nail (6), and iron nail (6) side is equipped with movable contact (7), Insulating paper (5) lower end is equipped with bottom plate (3), is equipped with stationary contact (4) between the insulating paper (5) and bottom plate (3), the stationary contact Point (4) is fixedly connected on bottom plate (3) upper end side, and bottom plate (3) lower end is equipped with heater element PTC (2), the heater element PTC (2) lower end is connected with installation card (1), and the heater element PTC (2) is located at installation card (1) inside, the PTC shell (9) Interior lower end is welded with weld tabs (10), and weld tabs (10) upper end connects bimetal leaf (8) side, and the bimetal leaf (8) is inclined It is internal to be tiltedly placed in PTC shell (9), the movable contact (7) is located at stationary contact (4) upper end side.

2. the novel overheat overcurrent power-off protection device of one kind according to claim 1, it is characterised in that: the insulating paper (5) insulation voltage is AC1800V.

3. the novel overheat overcurrent power-off protection device of one kind according to claim 1, it is characterised in that: the insulating paper (5), movable contact (7) and stationary contact (4) upper end are equipped with silver layer, and the electric current that silver layer can bear 10A works normally 10000 times.

4. the novel overheat overcurrent power-off protection device of one kind according to claim 1, it is characterised in that: the iron nail (6) pulling force of bottom plate (3) 3KG can be born with bimetal leaf (8) junction, stationary contact (4) and bottom plate (3) junction can bear bottom The pulling force of plate (3) 3KG.

5. the novel overheat overcurrent power-off protection device of one kind according to claim 1, it is characterised in that: the stationary contact (4) and movable contact (7) is electrically conductive.