CN202106115U - Electric iron over-heating protection device - Google Patents
Electric iron over-heating protection device Download PDFInfo
- Publication number
- CN202106115U CN202106115U CN2011201908082U CN201120190808U CN202106115U CN 202106115 U CN202106115 U CN 202106115U CN 2011201908082 U CN2011201908082 U CN 2011201908082U CN 201120190808 U CN201120190808 U CN 201120190808U CN 202106115 U CN202106115 U CN 202106115U
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- CN
- China
- Prior art keywords
- electric iron
- relay
- flexure strip
- iron
- relay base
- Prior art date
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- Expired - Fee Related
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Abstract
The utility model relates to an electric iron over-heating protection device. An upper elastic slice and a lower elastic slice are arranged in a fixation sleeve and connected with a bottom seat of a relay. A programmable timer is arranged in the bottom seat of the relay. A plug and a plug socket are arranged on the bottom seat of the relay. The programmable timer uses the CD4541. The power supply can automatically turn off, if the electric iron is not used for a long time by the working personnel, so as to prevent the electric iron from being damaged due to long-time heating and prevent the safety misadventure.
Description
Technical field
The utility model relates to electric iron, is specifically related to a kind of electric iron overtemperature protection system.
Background technology
In the daily life,, can see the figure of common internal heat type electric soldering iron like the Experiment of Electrical Engineering chamber of university, electric appliances service unit.Simple and easy internal heat type electric soldering iron on the market all is to utilize a heating core heating back to produce heat, makes the preceding ferrochrome of heating core produce head and is heated between 200 ° ~ 300 °, makes the solder stick fusing be fixed on the effect of playing welding on the circuit board.But sometimes in use,, often after using electric soldering iron, it is not extracted from power supply because staff's custom is bad; Cause its long heating; So not only can influence the service life of electric soldering iron, but also the utmost point there is initiation fire, causes security incident.
Summary of the invention
The utility model technical problem to be solved provides a kind of electric iron overtemperature protection system, and auto power off when the staff does not use electric iron for a long time prevents because long-time heating causes electric iron to damage, cause security incident.
For solving the problems of the technologies described above, the technical scheme that the utility model is taked is: the electric iron overtemperature protection system, be provided with flexure strip, following flexure strip in the fixed cover, and last flexure strip, following flexure strip are connected with relay base.
Be provided with programmable interval timer in the said relay base.
Said relay base is provided with plug, jack.
Said programmable interval timer adopts CD4541.
The utility model electric iron overtemperature protection system, fixed cover are enclosed within on the handle of electric iron, establish upper and lower two elasticity iron plates in the fixed cover, and its effect is similar to switch.Purpose is whether to carry out work with electric iron for the perception staff.
When the staff when using electric iron, use to hold and fasten cover.At this moment the last elasticity iron plate in the fixed cover can contact with following elasticity iron plate, at this moment can produce a reset signal and give relay base.Relay base is provided with the jack of a plug, with the plug that links to each other with power supply.Relay base inside is made up of relay switch and programmable interval timer U1.
1., relay base picks up counting once energising, the time can be set, and guarantees that electric iron can be heated to operating temperature, is generally about half an hour.When not receiving the reset signal of elasticity iron plate in the fixed cover, timing just can deenergization to setting-up time, prevents that electric iron from continuing heating.
2., when normally using electric iron, reset signal is sent in upper and lower two elasticity iron plates contact.When but timer does not also arrive setting-up time, even obtained reset signal, can deenergization yet, electric iron can also continue heating.Do not influence normal use.
3., arrive setting-up time at timer, the reset signal that upper and lower two elasticity iron plates contact back of having got back simultaneously after the disconnection produces, relay base power turn-on switch heats to electric iron.When the staff does not use electric iron, just can cut off the power supply automatically like this and reach the purpose that prevents the electric iron long-time heating.
Relay base is provided with plug, jack.Plug connects the alternating current 220V power supply, and jack is as the electric iron power interface.
Description of drawings
Below in conjunction with accompanying drawing and embodiment the utility model is described further:
Fig. 1 is the utility model structure drawing of device;
Fig. 2 is the utility model device circuit figure.
The specific embodiment
The electric iron overtemperature protection system is provided with flexure strip 2, following flexure strip 3 in the fixed cover 1, last flexure strip 2, time flexure strip 3 are connected with relay base 4.Be provided with programmable interval timer U1 in the relay base 4.Said relay base 4 is provided with plug, jack.Programmable interval timer U1 adopts CD4541.
Like Fig. 1, shown in Figure 2, fixed cover 1 is enclosed within on the electric iron handle, in establish flexure strip 2, following flexure strip 3.Last flexure strip 2, flexure strip 3 is connected with relay base 4 through power line down.Relay base 4 is provided with plug, jack.Plug connects the alternating current 220V power supply, and jack is as the electric iron power interface.
During energising, relay contact K3-1 holds with being connected on and is output as low level, is low level when arriving 6 pins of U1 through triode BG2.Timer picks up counting, and 8 pins of U1 are output as low level in timing time.Relay K 1 work, relay contact K1-1 adhesive make on high-tension side relay K 2 work, and relay contact K2-1 adhesive is supplied power to electric iron.
When timing time arrived setting value, relay contact K3-1 still held with being connected on and is output as low level, and at this moment 8 pins of U1 are output as high level, and relay K 1 is not worked, and contact K1-1 breaks off.On high-tension side relay K 2 does not have supply voltage, and relay K 2 is not worked, and contact K2-1 breaks off, and just the power supply of electric iron is given and is cut off, and stops to heat to electric iron.
When using electric iron, hold the handle of electric iron, at this moment just can give fixed cover 1 pressure, last flexure strip 2, time flexure strip 3 contact.Quite K switch EY is closed, relay K 3 work, and contact K3-1 jumps to the right, inserts high potential, produces the high level signal that arrives 6 pins of U1 through triode BG2.U1 does not work not-time yet, and 8 pins of timer U1 are low level, then relay K 1 work this moment, contact K1-1 adhesive.On high-tension side relay K 2 work, contact K2-1 adhesive is supplied power to electric iron.
When not using electric iron for a long time, timer timing one just can stop to heat to electric iron to breaking off relay K 1, K2.The setting-up time of timer U1 is to be decided by the size of resistance R 1 with capacitor C 1, timing T=32768 * 2.3 * RCs, and the user can realize being provided with voluntarily the time through changing resistance R 1 size.
The parameter of each electrical equipment is following:
Resistance R is the heating wire of electric iron; K switch EY is last flexure strip 2, flexure strip 3 down; Resistance R 1 is that slide rheostat is that 5K Ω, resistance R 2, R3, R4, R5, R6, R7, R8, R9, R10 are respectively 2.2K Ω, 1K Ω, 100K Ω, 100 Ω, 100K Ω, 5K Ω, 5K Ω, 10K Ω, 50 Ω, 5K Ω, 10K Ω, capacitor C 1, capacitor C 2, capacitor C 3, is respectively 10uF, 220uF, 100uF, and diode D1, D2, D3, D4, D5 are IN4001; Zener diode WD1 is the voltage-stabiliser tube of 24V; Triode BG1, BG2 are 9013, and LED is a light emitting diode, and IC device U1 is CD4541.
Claims (4)
1. the electric iron overtemperature protection system is characterized in that: be provided with flexure strip (2), following flexure strip (3) in the fixed cover (1), last flexure strip (2), following flexure strip (3) connection relay base (4).
2. according to the said electric iron overtemperature protection system of claim 1, it is characterized in that: be provided with programmable interval timer (U1) in the said relay base (4).
3. according to claim 1 or 2 said electric iron overtemperature protection systems, it is characterized in that: said relay base (4) is provided with plug, jack.
4. according to the said electric iron overtemperature protection system of claim 2, it is characterized in that: said programmable interval timer (U1) adopts CD4541.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201908082U CN202106115U (en) | 2011-06-08 | 2011-06-08 | Electric iron over-heating protection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201908082U CN202106115U (en) | 2011-06-08 | 2011-06-08 | Electric iron over-heating protection device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202106115U true CN202106115U (en) | 2012-01-11 |
Family
ID=45431564
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011201908082U Expired - Fee Related CN202106115U (en) | 2011-06-08 | 2011-06-08 | Electric iron over-heating protection device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202106115U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102528205A (en) * | 2012-02-08 | 2012-07-04 | 张誉馨 | Electric soldering iron |
-
2011
- 2011-06-08 CN CN2011201908082U patent/CN202106115U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102528205A (en) * | 2012-02-08 | 2012-07-04 | 张誉馨 | Electric soldering iron |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120111 Termination date: 20120608 |