CN2406331Y - Fire-retardant general power-supply switch - Google Patents

Abstract

The utility model relates to a novel fire-retardant general power supply switch which is used for preventing fires because of short circuits. The utility model is composed of a switch panel, a switch button, a switch movable contact, a switch stationary contact, a springboard, a switch box, and an overload protector which is composed of a current thermal effect induction strip, a bimetallic strip, a push rod, a current control adjusting device, an electricity failure control strip, a current control trimming strip, a movable contact bracket, a movable contact, and a stationary contact. When the load current is too high, or the temperature of the switch is beyond 60 DGC because of a fire, the power can be cut off automatically in time to prevent the fire behavior from enlarging because appliances are burned by the fire to generate a short circuit. Simultaneously, the utility model also has the functions of acoustic alarm and light alarm. The utility model has the advantages of stable and reliable performance, and novel and simple structure.

Description

The fire prevention utility power switch

The utility model relates to the jockey that a kind of electrical equipment UNICOM power supply is used, and particularly can prevent the fire prevention utility power switch that causes fire to use because of short circuit.

At present, the mains switch that market sell is used with people mostly is a mains switch of considering design from multi-functional and personal safety.Along with improving constantly of people's material and cultural life, in order to pursue comfortable luxurious live and work environment, to decorating in public gathering place and the family, electric wire and general electronic corporation are embedded among the inflammable ornament materials.Because long-term outmoded, the aging circuit of electric equipment that uses, add that the supply socket that is embedded in the wall is not with the flameproof protection measure again, the accident fire that causes because of reasons such as short circuit, excess loads accounts for the over half of sum.As Beijing furniture big market, Nanjing Railway Station, wildfire accidents such as Changsha Wuyi Road bank all cause because of electrical short-circuit causes burning things which may cause a fire disaster.In April, 1998, the fire-fighting work dynamics is strengthened in national legislation.Administration of the prevention and control department one is that requirement adopts the branch family that the overload protection device is installed, the excessive initiation fire of control power load overload electric current.The 2nd, require on ornament materials, to be coated with last layer heatproof fireproof paint, can prevent that fire from taking place and delaying fire back fire spreading speed takes place, strive for attack time.The 3rd, adopt fire to cause initial stage warning device reminds people and in time put out a fire.But because the rated current of branch family overload protection device control range is generally about 30 amperes; Control current is too small; electric current needs in the time of can not satisfying the whole appliance starting of user; the rated current of control is excessive, and the household electrical appliance very little to rated current do not have the power-off protection effect at all when overloading initiation fire.In addition, be coated with last layer heatproof fireproof paint on ornament materials, it costs an arm and a leg, and installs and uses complexity, only is adapted to large-scale high-grade place, and use can't be popularized in family and small-sized public place.The more important thing is to take effective measures and solve.

At the defective of conventional power source switch existence, and need to be resolved hurrily, the design people is based on abundant practical experience and professional knowledge, and through unremitting effort for many years, traditional mindset has been walked out in constantly research, exploration finally, has designed the utility model.

Main purpose of the present utility model has been to overcome the deficiency that above-mentioned conventional power source switch exists, and a kind of new fire prevention utility power switch is provided.Solved the conventional power source switch not with the problem of flameproof protection, the utility model utilizes temperature sense metal fever effect principle, produces to have the general mains switch of fire prevention, and it is stable and reliable for performance, novelty simple in structure.

The purpose of this utility model is realized by following technical scheme.According to the fire prevention utility power switch that the utility model proposes; include switch panel; switch peace button; switch sound contact; springboard; switch enclosure fire and overload protection device; it is characterized in that the overload protection device is to be made of set bolt and the different parts that are fixed on the set bolt; variant parts are separated by insulation cushion; on set bolt, from top to bottom be equipped with successively; the Current Control adjusting device of forming by adjustment screw that is equipped with in the cylindrical housings of supporting bracket head and the shell and porcelain top; the Current Control trim tab; the outage control strip; termination moving contact support under the outage control strip; one of moving contact support is equipped with moving contact; moving contact and fixed contact join; the normally closed shell fragment of moving contact is connected with the Current Control trim tab; the heating effect of current sensing chip is equipped with bimetal leaf in it; heating effect of current sensing chip and bimetal leaf and outage control strip and moving contact support head have circular hole; adorn a push rod between the circular hole; outage control strip one end that is fixed on the set bolt end has a power firestreak input terminal; there is a heating effect of current sensing chip output heating effect of current sensing chip lower end that is fixed on the set bolt end; be connected to the switch moving contact of springboard head end by the input of lead and switch, the switch fixed contact connects output switching terminal.

Before described outage controlfin and Current Control trim tab the right link into an integrated entity, three faces of outage controlfin and Current Control trim tab have and separate slotted hole, the front end of Current Control trim tab has a square hole, its head is bent downwards.

Before link into an integrated entity on the right of the normally closed shell fragment of described moving contact support and moving contact, three faces of moving contact support and the normally closed shell fragment of moving contact have and separate slotted hole, the front end of the normally closed shell fragment of moving contact has a tongue.

The shape of preceding described heating effect of current sensing chip becomes on one side to lack into square prolate S shape, has through hole on both sides.

The purpose of this utility model can also further realize by following technical measures.There is an alarm signal power contact the preceding described outage controlfin lower end that is fixed on the set bolt end, is connected with alarm with alarm lamp by lead.

The utility model compared with prior art has tangible advantage and good effect.Owing to adopted technique scheme, overcome the fire that the conventional power source switch does not cause because of electrical short-circuit with protector.It forms the overload protection apparatus by heating effect of current sensing chip, bimetal leaf, push rod, Current Control adjusting device, outage controlfin, Current Control trim tab, moving contact support, moving contact and fixed contact.Too high or when making the socket temperature surpass 60 degrees centigrade at load current because of initiation fire, can in time cut off the electricity supply automatically, prevent to produce short circuit and strengthen the intensity of a fire because of fire burns out electrical equipment, also have sound simultaneously, light is reported to the police.

Concrete structure of the present utility model is provided in detail by following examples and accompanying drawing thereof.

Fig. 1 is an overall structure schematic diagram of the present utility model.

Fig. 2 is a front view of the present utility model.

Fig. 3 is a vertical view of the present utility model.

1. the normally closed shell fragment 23. alarm signal power contacts of screw 21. gripper shoes, 22. movable contacts 24. felt pads 25. alarm signal output ends 26. alarm lamps 27. alarms 28. overload protector shells 29. devices taking alarm, alarm lamp terminals are adjusted in switch panel 2. shift knobs 3. switch sound contacts 4. springboards, 5. switch enclosures, 6. output switching terminals, 7. power firestreak input terminals 8. heating effect of current sensing chip outputs 9. set bolts 10. heating effect of current sensing chips 11. bimetal leafs 12. stationary contacts 13. movable contacts 14. moving contact supports 15. push rods 16. power operation sheets 17. Current Control trim tabs 18. housings 19. porcelains top 20.

See also Fig. 1, Fig. 2, shown in Figure 3, the utility model fire prevention utility power switch is by switch panel 1, alarm lamp 26 and shift knob 2 are housed on switch panel, the book sheet that connects under being equipped with in the switch enclosure 5 under the switch panel in shift knob and the spring on both sides, the book sheet is connected with the triangle pressing plate with spring, springboard 4 one ends are that (switch sound contact 3 represents that respectively switch is moving to switch moving contact 3, fixed contact 3) with switch fixed contact 3 closure, the switch fixed contact connects output switching terminal 6, another termination binding post of springboard 4 connects heating effect of current sensing chip output 8 by lead again.

Insulate with insulation cushion 24 isolation between each parts of overload protection device, each parts is tightened to one with set bolt 9.Moving contact support 14 is by the spring steel plate punch forming, one end is connected with 16 spot welding of power operation sheet, the other end fixedly stays the normally closed shell fragment 22 of centre one-tenth moving contact behind the moving contact 13 middle incisions three face length holes, one end links to each other with moving contact support 14, and the other end inserts in Current Control trim tab 17 square holes.Power operation sheet 16 is by the spring steel plate punch forming; one end is connected with moving contact support 14 spot welding; boring a diameter in the two spot welding junction is the 2mm hole; be used to install push rod 15; the other end and insulation cushion 24 overlapping placements; be fixed together with set bolt 9 protectors; the termination is a power firestreak input terminal 7; Current Control trim tab 17 is left after cutting three face length holes in the middle part; its termination opens a square hole and the normally closed shell fragment 22 of moving contact links; because the normally closed shell fragment 22 of moving contact is more longer than Current Control trim tab 17; force the normally closed shell fragment of moving contact to produce strain during installation and moving contact support 14 is in open shape under flexible effect; because fixed contact 12 is fixed, thereby make moving contact 13 and fixed contact 12 be in the long state that closes.The Current Control adjusting device is fixed on the supporting bracket 21, by housing 18, adjusting screw 20 and porcelain top 19 forms, adjusting screw 20 and porcelain top 19 is contained in the housing 18, dextrorotation is adjusted screw 20 and is made outwards elongation of porcelain top 19, Current Control trim tab 17 is moved up, force the normally closed shell fragment 22 aggravation elastic bending deflections of moving contact, thereby shortened difference in length with Current Control trim tab 17, continuous elongation along with porcelain top 19, its difference in length is more and more littler, when its difference in length is negative, the normally closed shell fragment 22 of moving contact becomes inside pulling force by outside tension force, moving contact support 14 is pulled to rightabout move, thereby moving contact 13 and fixed contact 12 are separated, by adjusting screw 20, can change the directional curvature deflection of bimetal leaf 11 separate contacts.Heating effect of current sensing chip 10 1 ends are connected with fixed contact 12, and the other end is connected with heating effect of current sensing chip output 8, and the centre is equipped with bimetal leaf 11, and it is in contact with one another face and separates with insulation cushion.Heating effect of current sensing chip 10 has circular hole with bimetal leaf 11 left ends, is used to install push rod 15.Under normal operation, electric current connects the switch moving contact 3 of binding post to springboard 4 by power firestreak input terminal 7, Current Control trim tab 17, power operation sheet 16, the normally closed shell fragment 22 of moving contact, moving contact support 14, fixed contact 12, moving contact 13, heating effect of current sensing chip 10, heating effect of current sensing chip lead-out terminal 8 by lead successively.

Heating effect of current sensing chip 10 adopts the thermo electric material punch forming; it is to guarantee that the overload protection device is when the rated current scope is worked that its Specifeca tion speeification requires; temperature is no more than 60 degrees centigrade; when the electric current overrate; can convert electric energy to thermal energy transfer rapidly and give bimetal leaf 11; make the distortion of bimetal leaf directional curvature; become mechanical energy by thermal power transfer; promote push rod 15; power operation sheet 16 moves downward; because Current Control trim tab 17 is subjected to 19 restrictions of porcelain top; force the normally closed shell fragment 22 of moving contact to strengthen elastic bending deflection; dwindled difference in length with Current Control trim tab 17; force the normally closed shell fragment 22 of moving contact to be transformed into reverse pulling force by elasticity tension; moving contact 13 and fixed contact 12 are disconnected, cut off circuit, in the moment that moving contact 13 and fixed contact 12 disconnect; charged moving contact 13 is connected with alarm signal power contact 23, and electric current is sent to alarm lamp 26 and alarm 27 through alarm signal output ends 25.Alarm lamp is a light-emitting diode, and alarm is the existing product that market can have been bought.The overload protection device is contained in the outer box 28 of overload protection device, the outer box 28 of overload protection device be contained in again switch panel 1 below, the outer box of overload protection device is drawn indicator light taking alarm, alarm terminals 29 and power firestreak input terminal 7.

The above; it only is preferred embodiment of the present utility model; be not that the utility model is imposed any restrictions; everyly any simple modification that above embodiment did, change and equivalent structure are changed, all still belong in the protection range of technical solutions of the utility model according to the utility model technical spirit.

Claims (5)

1; a kind of fire prevention utility power switch; include switch panel; switch peace button; switch sound contact; springboard; switch enclosure fire and overload protection device; it is characterized in that the overload protection device is to be made of set bolt and the different parts that are fixed on the set bolt; variant parts are separated by insulation cushion; on set bolt, from top to bottom be equipped with successively; the Current Control adjusting device of forming by adjustment screw that is equipped with in the cylindrical housings of supporting bracket head and the shell and porcelain top; the Current Control trim tab; the outage control strip; termination moving contact support under the outage control strip; one of moving contact support is equipped with moving contact; moving contact and fixed contact join; the normally closed shell fragment of moving contact is connected with the Current Control trim tab; the heating effect of current sensing chip is equipped with bimetal leaf in it; heating effect of current sensing chip and bimetal leaf and outage control strip and moving contact support head have circular hole; adorn a push rod between the circular hole; outage control strip one end that is fixed on the set bolt end has a power firestreak input terminal; there is a heating effect of current sensing chip output heating effect of current sensing chip lower end that is fixed on the set bolt end; be connected to the switch moving contact of springboard head end by the input of lead and switch, the switch fixed contact connects output switching terminal.

2, fire prevention utility power switch according to claim 1, it is characterized in that described outage controlfin and Current Control trim tab the right links into an integrated entity, three faces of outage controlfin and Current Control trim tab have and separate slotted hole, the front end of Current Control trim tab has a square hole, and its head is curved downwards.

3, fire prevention utility power switch according to claim 1, it is characterized in that the normally closed shell fragment of described moving contact support and moving contact the right links into an integrated entity, three faces of moving contact support and the normally closed shell fragment of moving contact have and separate slotted hole, and the front end of the normally closed shell fragment of moving contact has a tongue.

4, fire prevention utility power switch according to claim 1 becomes to lack into square prolate S shape Yi Bian it is characterized in that the shape of described heating effect of current sensing chip, has through hole on both sides.

5, fire prevention utility power switch according to claim 1 is characterized in that there is an alarm signal power contact the described outage controlfin lower end that is fixed on the set bolt end, is connected with alarm with alarm lamp by lead.

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