CN2115853U

CN2115853U - Electric soldering iron with ability of auto-controlling temparature

Info

Publication number: CN2115853U
Application number: CN 92203968
Authority: CN
Inventors: 罗刚
Original assignee: Individual
Current assignee: Individual
Priority date: 1992-03-06
Filing date: 1992-03-06
Publication date: 1992-09-16

Abstract

The utility model discloses an automatic temperature controlled electric iron, comprising a handle, an iron head, an iron rod, an iron core, a temperature adjusting turn knob, a connecting sleeve, a lever and a microswitch. The utility model is characterized in that the connecting sleeve is in threaded connection iwth the inner side of the temperature adjusting turn knob, the other end of the inner side of the temperature adjusting turn knob is in threaded connection with the handle, and the screw pitch of the handle is larger than the screw pitch of the connecting sleeve. The utility model has the advantages of easy fabrication, simple structure and wide range of application.

Description

Electric soldering iron with ability of auto-controlling temparature

The utility model is a kind of temperature automatically controlled electric iron of internal heat type of temperature adjustment continuously, is applicable to the various electronic components of welding, device.

Common electric iron must have enough power in order to adapt to welding operation continuous on the production line.If their energisings have been left unused a period of time, it is too high that its temperature will become, the speed and the welding quality of influence welding, even solder horn " is burnt " in meeting to death.Existing temperature automatically controlled electric iron price is higher, is difficult to popularize.Solved the problems referred to above preferably though the patent No. is the utility model of CN87202288U, still had weak point, as vital part requirement on machining accuracy height, bad mechanical strength etc.

The purpose of this utility model is to provide a kind of cheap and widely applicable temperature automatically controlled electric iron.

Fig. 1 is a cutaway view of the present utility model.

Among the figure: ［ 1 ］--solder horn; ［ 2 ］--the flatiron bar; ［ 3 ］--iron core; ［ 4 ］--adapter sleeve; ［ 5 ］--thermoregulation knob; ［ 6 ］--handle main body; ［ 7 ］--lever; ［ 8 ］--microswitch; ［ 9 ］--shift knob; ［ 10 ］--plug; ［ 11 ］--socket; ［ 12 ］［ 13 ］--keyway; ［ 14 ］--positioning spigot.

The utility model is achieved in that a kind of electric soldering iron with ability of auto-controlling temparature, formed by handle, solder horn, flatiron bar, iron core, thermoregulation knob, adapter sleeve, lever, microswitch, it is characterized in that adapter sleeve is connected with the inboard threaded one end of thermoregulation knob, the thermoregulation knob inboard The other end is threaded with handle, and the pitch of handle is greater than the pitch of adapter sleeve. The link of iron core and lever is made of plug and socket; The pitch difference of handle and adapter sleeve is 0.1-1mm.

The technical essential of utility model is: (1) adopts the metal material of high expansion coefficient to manufacture flatiron bar 2, and its end is fixed on the adapter sleeve 4, and the other end has the positioning spigot 11 that prevents that iron core 3 from passing.(2) adopt low-expansion refractory ceramics to manufacture the outer tube of iron core 3, and fix a plug 10 at the lead end of iron core 3 and replace lead-in wire.Plug 10 also will play the effect of transmitting pressure simultaneously.(3) select for use heat-resisting bakelite or engineering plastics to manufacture thermoregulation knob 5, thermoregulation knob 5 links together handle 6 and adapter sleeve 4.The pitch of the screw thread that knob 5 matches with adapter sleeve 4 is less than the pitch of the screw thread that knob 5 matches with handle 6.(4) cooperating by keyway 12,13 between adapter sleeve 4 and the handle 6 to prevent the two relatively rotating between referring to.

Operation principle of the present utility model is as follows:

Assemble all parts as shown in the figure.Wherein: iron core 3 is matched in clearance with flatiron bar 2; Microswitch 8 is fixed on the handle 6, and its normally opened contact (not shown) and iron core are in series.When knob 5 is screwed, the positioning spigot 14 of flatiron bar 2 will drive iron core 3 and move right.When being tightened onto to a certain degree, iron core 3 will make its long-armed shift knob 9 of pressing to by the plug 10 compressing levers 7 of its right-hand member, make closing of circuit.At this moment iron core 3 can heating be given flatiron bar 2 and solder horn 1 heating.Can expand after flatiron bar 2 is heated, and iron core 3 does not expand basically, like this, will cause iron core 3 to loosen by exert pressure power on the lever of plug 10.When flatiron bar 2 was heated to a certain temperature T, shift knob will rebound, and circuit is disconnected.Subsequently, flatiron bar 2 begins cooling and Yin Wendu reduces and shortens, thereby causes positioning spigot 14 to drive iron core 3 once more and plug 10 is pressed to lever 7 once again, the long-armed shift knob 9 of pressing to once more of lever 7.When the temperature of flatiron bar dropped to a certain value T2, button 9 was depressed once more, and circuit is closed once more, and flatiron bar 2 and solder horn 1 are heated once more.So just the temperature T of electric iron can be stabilized in certain scope, i.e. T1＞T＞T2.

Embodiment of the present utility model:

Adopt red copper to manufacture solder horn 1; Adopt H62 brass to manufacture flatiron bar 2; Adopt alumina porcelain to manufacture the outer tube of iron core 3; Adopt free machining metal (as brass, aluminium alloy, steel etc.) to manufacture pole socket 4; Adopt that heat-resistant adhesive is wooden to be done thermoregulation knob 5 and get right-hand member that two pitch are knob 5 and the difference of the pitch of left end is 0.25mm; Adopt engineering plastics to manufacture handle 6; Lever 7 must be designed to have overload protection function, to guarantee not and can revolve to such an extent that tension etc. is former thereby damage lever because of thermoregulation knob.By the temperature control electric iron that above-mentioned requirements is manufactured, its temperature-controlled precision can reach 5.6 ℃ in theory.Computational methods are as follows:

Temperature fluctuation range T is defined as follows: T=T1-T2

Definition by thermal coefficient of expansion:

α＝ (dL)/(dT) (I)/(L) = (△L)/(△T) (I)/(L)

Can push away to such an extent that ask the approximate formula of T:

△T＝ (△L)/(αT) （1）

L is the length that plays that section of survey, temperature control effect on the flatiron bar in the formula, and is concerning power is the electric iron of 35W, desirable

L＝60mm＝6×10 ^－2m

L is the minimum change that microswitch 8 can be moved, and it is 10 by the multiplication factor of lever 7 and the decision of microswitch 8 differential movements if get the multiplication factor of lever 8, takes away to close the differential movement that 8 differential movement is 0.05mm(kw4≤0.05mm) then

△L＝ 0.05/10 ＝0.005mm＝50×10 ^－6m

Should get equivalence value, be at the equivalence value of the average coefficient of expansion of 0--300 ℃ of scope:

α=α _H62-α porcelain=(22-7) * 10 ^-6=15 * 10 ^-6/ ° K

With the above-mentioned substitution formula (1) that respectively is worth,

△T＝ (△L)/(αT) (5×10 ^{- 6})/(15×10 ^-6×6×10 ^-2) ＝5.6℃

Owing to exist the strain of mechanisms such as thermal inertia and lever 7, actual temperature fluctuation range is greater than △ T.

The temperature that the rotation thermoregulation knob can be regulated flatiron.Whenever screwed for 1 week, temperature will raise about 278 ℃.

Compare with existing like product, the utlity model has simple in structure, cost is low, easy to implement, reliable, widely applicable, the advantages such as saves energy.

Claims

1, a kind of temperature automatically controlled electric iron that includes handle 6, solder horn 1, flatiron bar 7, iron core 3, thermoregulation knob 5, adapter sleeve 4, lever 7, microswitch 8, it is characterized in that: adapter sleeve 4 is connected with the inboard threaded one end of thermoregulation knob 5, the inboard other end of thermoregulation knob 5 is threaded with handle 6, and the pitch of handle 6 is greater than the pitch of adapter sleeve 4;

2, temperature automatically controlled electric iron according to claim 1 is characterized in that: iron core 3 is made of plug 10 and socket 11 with the link of lever 7;

3, temperature automatically controlled electric iron according to claim 1 is characterized in that: handle 6 is 0.1-1mm with the pitch difference of adapter sleeve 4;

4, temperature automatically controlled electric iron according to claim 1 is characterized in that: adapter sleeve 4 and handle 6 cooperating to prevent that above-mentioned two members from producing relative rotation by keyway 12,13;

5, temperature automatically controlled electric iron according to claim 1 is characterized in that: the right-hand member of flatiron bar 2 is fixed in the adapter sleeve 4 by interference fit, and the left end of bar 2 has a location seam, prevents that iron core 3 from passing;

6, temperature automatically controlled electric iron according to claim 1 is characterized in that: the right-hand member of flatiron bar 2 is fixed by welding in the adapter sleeve 4;

7, temperature automatically controlled electric iron according to claim 1 is characterized in that: flatiron bar 2 adopts the metal material of high expansion coefficient to make.