JP2000288723A - Soldering iron - Google Patents

Abstract

PROBLEM TO BE SOLVED: To facilitate the recovery of temperature even when the temp. of an iron tip is lowered and to reduce the effect of surrounding temp. by arranging a cover for covering the outer periphery of a heater pipe and a means for fastening the cover. SOLUTION: A cover 20 is fitted to the neck part 14 of a soldering iron body 1 with a hose band 21. The cover 20 is made of metal and bent to a cylinder and the tip part is contracted. The cover 20 covers the outer periphery of the heater pipe 12 and part of the iron tip 11 is exposed. Since the heater pipe 12 is not in contact with outer air, the effect of outer air is eliminated and the temp. of the iron tip 11 is stabilized. Since the cover 20 can freely be fitted/removed, the cover can be fitted to various kinds of the soldering irons. Even if the soldering iron is dropped, the cover 20 is hit first, and hence the soldering iron 11 is hardly bent. Since the temp. variation is small, the service life of a ceramic heater is extended and the power consumption is reduced.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure for improving the temperature recovery performance during continuous operation of an electric soldering iron.

[0002]

2. Description of the Related Art A soldering iron used when an electronic component is mounted on a substrate is configured so that a ceramic heater generates heat to heat an iron tip. The structure of the soldering iron is configured as described in JP-A-9-300688. Further, as described in Japanese Patent Application Laid-Open No. H08-118004, when used, heat is taken away by contact with a load, and the temperature of the iron tip decreases. The temperature of the soldering iron tip is desirably stabilized at a temperature suitable for the soldering operation.

[0003]

SUMMARY OF THE INVENTION According to the present invention, there is provided a soldering iron which is less affected by the environmental temperature, the temperature of the iron tip is hardly reduced by contact with a load, and the reduced temperature of the iron tip is easy to recover. The purpose is to.

[0004]

In order to achieve the above object, the electric soldering iron is provided with a cover for covering the outer periphery of the heater pipe, and fastening means for fastening the cover to the soldering iron.

[0005]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a soldering iron according to the present invention will be described below with reference to the drawings. FIG. 1 shows the appearance of a soldering iron according to the present invention. The soldering iron main body 1 is generally used.
2 is removably mounted.

[0006] A cover 20 is attached to the neck 14 of the soldering iron 1.
Is attached with a hose band 21. Cover 20
Is made of metal and is bent into a cylindrical shape, and the tip is narrowed. The cover 20 has a shape that covers the outer periphery of the heater pipe 12, and a part or all of the iron tip 11 is exposed. The hose band 21 is shown as a fastening means for attaching the cover 20 to the soldering iron 1, but any means for fixing the cover may be used. Conventionally, the heater pipe 12 was in contact with the outside air. However, since the heater pipe 12 was configured to cover the heater pipe 12, the influence of the outside air was reduced and the temperature of the iron tip was stabilized.

Substrate: glass epoxy substrate Load: 3A Schottky barrier diode Room temperature: 25 ° C. ± 3 ° C. Humidity: 50% ± 5% Set temperature: 350 ° C. Under the above conditions, the iron tip 11 is brought into contact with the load for 1 second.
The cycle of releasing for 1 second was repeated for 2 minutes.

[0008] Soldering iron tip using this embodiment 11
FIG. 3 is a graph showing the temperature change of the iron tip 11 with the cover 20 removed. As shown in the graph, the iron tip temperature of the soldering iron of this example was stabilized at ± 3 degrees when the temperature was lowered by about 15 degrees, and stabilized at ± 5 degrees when the temperature was lowered by 25 degrees when the cover 20 was removed. .

FIG. 4 shows that the temperature change of the iron tip 11 of the soldering iron of the present invention and the temperature change of the iron tip of the conventional soldering iron from the start of energization to the ceramic heater to the stabilization of the iron tip temperature under the same conditions. The results measured in the environment shown in FIG. It was found that the soldering iron having the cover 20 rose to the set temperature in a shorter time.

Since the cover 20 is detachable, it can be attached to various soldering irons.

[0011]

The soldering iron of the present invention has the following effects. The temperature change at the tip of the soldering iron is small and stable in a short time. Although there was a problem that the tip of the soldering iron bends due to the fall of the soldering iron, the tip of the soldering iron of the present invention is less likely to bend because the cover hits the cover even if it falls. Since the temperature change is reduced, the life of the ceramic heater is extended. Power consumption is lower than that of a soldering iron without a cover.

[Brief description of the drawings]

FIG. 1 is an external view of an embodiment according to the present invention.

FIG. 2 is an exploded view of an embodiment according to the present invention.

FIG. 3 is a graph in which the change in the temperature of the iron tip between the embodiment according to the present invention and the prior art is measured and compared.

FIG. 4 is a graph in which a change in the temperature of the iron tip from the start of energization to the ceramic heater between the embodiment and the prior art is measured and compared.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Solder iron body 11 Iron tip 20 Cover 21 Hose band

Claims (1)

[Claims] 1. An electric soldering iron, comprising: a cover covering an outer periphery of a heater pipe; and fastening means for fastening the cover to the soldering iron.