CN2313694Y

CN2313694Y - Coaxial electric iron head

Info

Publication number: CN2313694Y
Application number: CN 97230647
Authority: CN
Inventors: 陈伟就
Original assignee: Individual
Current assignee: Individual
Priority date: 1997-12-18
Filing date: 1997-12-18
Publication date: 1999-04-14
Anticipated expiration: 2007-12-18

Abstract

The utility model relates to a coaxial electric soldering bit. A traditional V-shaped structure is improved. The coaxial electric soldering bit adopts an outer sleeve pipe provided with a working conical point. A heating element is arranged in a conical cavity. A core rod is coaxially sheathed in the outer sleeve pipe. The core rod and the outer sleeve pipe are respectively used as wire connection electrodes of the heating element. With the structure, the utility model not only eliminates the short circuit effect, but also counteracts the electromagnetic inductions to be mutually close to zero. The utility model has the advantages of high thermal efficiency, cabinet structure, safe and convenient usage, etc.

Description

The coaxial-type electric soldering bit

The utility model relates to the technical field of electric soldering bit, particularly a kind of improved electric soldering bit structure.

At present, owing to use the transistor switch power supply to come the heating iron head, the volume and weight of electric soldering bit is greatly reduced as voltage changer; The thermal efficiency also increases, but its solder horn structure is still continued to use the moulding of V-type bonding jumper, and there is following major defect in the solder horn of this structure: 1. electromagnetic induction is serious.Because what the transistor switch power supply was supplied with is the big electric current of high frequency, solder horn produces powerful electromagnetic induction during work, when using close electric elements of solder horn or chip, wiring board, induces high voltage probably, is enough to cause permanent damage to electronic devices and components; 2. there is short-circuiting effect.Because the two ends of V-type solder horn and extension are exposed, relative voltage is higher, touches the electronic component or the Copper Foil on next door during welding because of carelessness, can cause short circuit, and the big electric current of the high frequency of Switching Power Supply will jeopardize electronic component or wiring board; 3. the thermal efficiency is not high.Distribute because the thermal power on the V-type solder horn is uniform state, heat scatters and disappears big, so cause efficient low.Therefore, be necessary traditional V-type solder horn structure is improved.

The purpose of this utility model is for overcoming above-mentioned the deficiencies in the prior art part, providing a kind of short-circuiting effect of eliminating, the electric soldering bit that electromagnetic induction is few, the thermal efficiency is high.

The purpose of this utility model is achieved by the following technical solution: the coaxial-type electric soldering bit, include Drawing cone point, heater element, mounting flange etc., special feature is that the rear portion of Drawing cone point is an outer tube, heater element is installed in the awl chamber, the also coaxial plug that is with in the outer tube, plug and outer tube are respectively as the link electrode of heater element.

Below in conjunction with drawings and Examples structure of the present utility model and advantage are further elaborated.

Fig. 1 is a structural representation of the present utility model;

Fig. 2 is the A-A cutaway view of Fig. 1.

Referring to Fig. 1 and Fig. 2, the outer tube 1 of present embodiment adopts stainless steel pipe (also can be metal pipe materials such as copper, iron), its forward part forms Drawing cone point 11, its rear portion then is fixed with mounting flange 3, the also coaxial metal mandrel 4 that is with in the outer tube 1, the exposed junction of plug core 4 flattens slightly, and is drilled with a wiring hole; A hole slot is then bored along axis direction in its inner end.Also be provided with the asbestos pipe 5 of the heat insulation usefulness of insulation between plug 4 and the overcoat 1; A bit of heating resistor line 2 is arranged in the awl chamber of Drawing cone point 11, one end and the 11 tip solid weldings of Drawing cone point, the hole slot of the end of the other end and plug 4 fastens and is connected, thereby makes outer tube 1 and plug 4 serve as the link electrode of heating resistor line 2 respectively.

Assembling process is such: earlier heating resistor line 2 is inserted on the hole slot of plug 4, with instrument it is compressed, is connected, after putting asbestos pipe 5 plug 4 is put into stainless steel outer sleeve pipe 1, and heating resistor line 2 passed by the aperture of awl on the point, with gas welding its welding is sealed, the polishing back plates the long-lived metal film of one deck parent tin in the cone appearance and gets final product again.

Such structure, advantage are tangible:

1, since plug, outer tube coaxial configuration install, and respectively as the link electrode of heating resistor line, when operating current is flowed through plug and outer tube, both current opposite in direction, the induced field of generation is cancelled out each other, total electromagnetic induction levels off to zero;

When 2, solder horn is worked, because the resistance value of heating resistor line is much bigger than plug and outer tube, and its sectional area is little, and surface area is also little, so the pressure drop major part of power supply is on the heating resistor line, substantially do not have pressure reduction on the outer tube, therefore eliminated the danger of short-circuiting effect;

3, the heating resistor line concentrates on and bores in the chamber, and heat is concentrated, and windage is few, thermal efficiency height.

In sum, the technical solution of the utility model makes the practicability of Switching Power Supply directly-heated type electric iron become possibility, is the solder horn structure of a kind of novelty, practicality, rich intention.

Claims

1, coaxial-type electric soldering bit includes Drawing cone point (11), heater element (2), and mounting flange (3) etc. is characterized in that:

All be outer tube (1) behind the Drawing cone point (11), heater element (2) is installed in the awl chamber; The also coaxial plug (4) that is with in the outer tube (1), plug (4) and outer tube (1) are respectively as the link electrode of heater element (2).

2, electric soldering bit according to claim 1 is characterized in that heater element (2) adopts the heating resistor line, one end and Drawing cone point (11) welding, and the other end and plug (4) are connected.

3, electric soldering bit according to claim 1 and 2 is characterized in that being provided with between plug (4) and the outer tube (1) the heat insulation asbestos pipe (5) of insulation.