CN2300997Y

CN2300997Y - Plug for overheat protection of electric-heating pipe

Info

Publication number: CN2300997Y
Application number: CN97213318U
Authority: CN
Inventors: 董晓波
Original assignee: Individual
Current assignee: Individual
Priority date: 1997-04-18
Filing date: 1997-04-18
Publication date: 1998-12-16
Anticipated expiration: 2007-04-18

Abstract

The utility model relates to a plug device for the overheating protection of electric heating pipes, which is additionally provided with an overheating protector on the basis of the existing plug, casing, socket, and power cord. The overheating protector is composed of a bimetallic strip, a conducting strip, a switch conducting strip, a reed, and a temperature regulating stator plate, wherein, the bimetallic strip and the conducting strip are respectively fixed with a dynamic contact and a static contact; the switch conducting strip is connected with a switch rod; the reed and the switch conducting strip are fixed with the bimetallic strip. The utility model has the advantages of reasonable structural design, high safety, no electric heating explosive breakage, etc.

Description

The plug device that is used for the electrothermal tube overtemperature protection

The utility model relates to a kind of plug device, particularly a kind of plug device that is used for the electrothermal tube overtemperature protection, and it mainly is applicable to insulating pot, electric frying pan etc.

Electric equipment products with the heating of electrothermal tube electric hot tray in the prior art are a lot; as insulating pot, electric frying pan etc.; these products all exist and (burn) hidden danger such as the quick-fried disconnected possibility of generation electrothermal tube, even initiation fire under the abnormal operating state as the anhydrous sky of insulating pot if there is not overtemperature protection system.Its structure of plug device of using on the insulating pot as shown in Figure 1 at present; it mainly by housing 1 ', jack 2 ' and power line 3 ' form; because the plug device of this structure does not have overheat protective function; so still have the quick-fried disconnected consequence of electric heating in actual use, when serious even initiation fire.

The purpose of this utility model is to overcome existing above-mentioned deficiency in the prior art; and provide a kind of plug device that is used for the electrothermal tube overtemperature protection; take place when overheated because of non-normal working at electrothermal tube; this plug device is promptly cut off the electricity supply automatically; and after the electrothermal tube cooling, also can not automatically reset, guaranteed the reliability of using.

The purpose that the utility model proposes can be achieved through the following technical solutions: this plug device comprises housing, jack and power line; its design feature is also to be provided with overtemperature protection system; this overtemperature protection system is made up of bimetal leaf, conducting strip, switch guide card, reed and temperature adjustment stator; be fixed with moving contact on the bimetal leaf; be fixed with fixed contact on the conducting strip; fixed contact communicates with power line by conducting strip; on the switch guide card, be connected with the switch rod; reed and switch guide card and bimetal leaf fix, and reed also contacts with temperature adjustment stator and temperature adjustment screw.

The utility model also can be installed thermal cut-off, and an end of this thermal cut-off is connected with plug cover, and the other end is connected with power line; thereby play the effect of duplicate protection; promptly when bimetal leaf lost efficacy, overheated temperature can make fuse blows, realized power cut-off thus.

Description of drawings is as follows:

Fig. 1 is the structural representation (lid is opened) of plug device in the prior art.

Fig. 2 is the schematic perspective view (lid is opened) of the utility model internal structure.

Fig. 3 is the A-A cutaway view of the utility model actuating mechanism.

Fig. 4 is another embodiment internal structure schematic perspective view of the utility model.

Following the utility model will be in conjunction with the accompanying drawings, and be described in further detail by embodiment.

Embodiment one:

Referring to Fig. 2, Fig. 3, the utility model is mainly on the basis of housing 1, jack 2 and power line 3, increased overtemperature protection system I, this overtemperature protection system I mainly is made up of bimetal leaf 6, conducting strip 9, switch guide card 10, reed 14 and temperature adjustment stator 11, moving contact 7 is riveted on the bimetal leaf 6, fixed contact 8 is riveted on the conducting strip 9, conducting strip 9 by screw on housing 1, and link to each other with a power line 3-1, bimetal leaf 6, switch guide card 10 and reed 14 are connected by closing-up; Be provided with the temperature adjustment screw 13 of adjustable height below the reed 14, the other end of reed 14 is stuck in the groove of temperature adjustment stator 11, temperature adjustment stator 11 then by screw on temperature adjustment stator seat 12, if move forward and backward 11 degrees of tightness that can adjust reed 14 of temperature adjustment stator, and then regulate bimetal leaf 6 operating temperatures; The other end of switch guide card 10 links to each other with switch rod 15.

On housing 1, this bimetallic plug cover 4 is made of bimetal leaf 6 and copper sheet bimetallic plug cover 4 by screw, and tightens with jump ring 14; Plug cover 18 also by screw on housing 1, this plug cover 18 is made of the biplate copper sheet, also with jump ring chucking, simultaneously, plug cover 18 also links to each other with another root power line 3-2.

19 is screw hole, and 17 is grounding nut, and this grounding nut 17 links to each other with power line earth connection 3-3.

For further tightening security property; also thermal cut-off 16 can be installed; this thermal cut-off 16 closely contacts with plug cover 18; and the one end is connected with plug cover 18; the other end is connected with power line 3-2, and when bimetal leaf 14 lost efficacy, overheated temperature can make thermal cut-off 16 fusing; thereby the realization power cut-off has played the effect of duplicate protection.

When work (when jack 2 inserts the electrothermal tube pin), Push switch rod 15 drives switch guide card 10 and reed 14, bimetal leaf 6 and moving contact 7 one take-offs thus to fixed contact 8, and moving contact 7 is closely contacted with fixed contact 8, thus the contact power supply.

When electrothermal tube is in abnormal operating state, too high temperature is passed on the bimetal leaf 6 by the electrothermal tube pin, make bimetal leaf 6 that bent the change be taken place, thereby make reed 14 that bent the change be taken place, when arriving a certain design temperature point, reed 14 is beated downwards, thereby drive moving contact 7, bimetal leaf 14 and switch guide card 10 jump out of fixed contact 8, realize outage, at this, the temperature of bimetal leaf 14 was restored, can not jump again yet, and must manually press switch rod 15, drive reed 14 by switch guide card 10 to fixed contact 8, bimetal leaf 6 and moving contact 7, the rebound fixed contact 8 again, just can reclose power supply.

Embodiment two:

Referring to Fig. 4, plug cover 20 during the present embodiment is used the grounding nut among the embodiment one 17 instead, two copper sheets of plug cover 20 usefulness constitute in this, are fixed on the housing 1 by screw, and simultaneously, middle plug cover 20 links to each other with power line earth connection 3-3.All the other structures and working condition are identical with embodiment one.

The utility model compared with prior art has the following advantages: 1. reasonable in design, and use the safety can Lean on: owing to be designed with overtemperature protection system, make electrothermal tube take place automatically to cut off when overheated because of non-normal working The disconnected phenomenon of Explosion can not appear in power supply; Simultaneously, the unartificial switch rod of pressing can not reclose power supply, Thereby guaranteed the reliability of using; 2. the function that has duplicate protection: owing to be designed with thermal cut-off, both made Bimetal leaf lost efficacy, and overheated temperature also can make thermal cut-off fusing, realizes thus power cut-off.

Claims

1. plug device that is used for the electrothermal tube overtemperature protection; comprise housing; jack and power line; it is characterized in that: also be provided with overtemperature protection system (I); this overtemperature protection system (I) is by bimetal leaf (6); electricity sheet (9); switch guide card (10); reed (14) and temperature adjustment stator (11)) form; be fixed with moving contact (7) on the bimetal leaf (6); be fixed with fixed contact (8) on the conducting strip (9); fixed contact (8) also communicates with power line (3) by conducting strip (9); on switch guide card (10), be connected with switch rod (15); reed (14) and switch guide card (10) fix with bimetal leaf (6), and reed (14) also contacts with temperature adjustment stator (11) and temperature adjustment screw (13).

2. plug device as claimed in claim 1 is characterized in that: thermal cut-off (16) also can be installed, and an end of this heat melting device (16) is connected with plug cover (18), and the other end is connected with power line (3).