JPH028605Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field This invention relates to an electric soldering iron that can fuse solder by reducing the temperature difference between the iron tip temperature and the heater temperature.

Prior Art In electric soldering irons, a heating element for heating the tip is removably inserted into a circular concave hole provided on the rear end surface of the tip.

However, with this configuration, the temperature of the tip may be higher than that of the heating element depending on the size of the gap formed between the inner peripheral surface of the concave hole of the tip and the outer peripheral surface of the heating element. Not only is it about 100-200℃ lower, but it is also impossible to iron the inner surface of the recessed hole of the tip.
If you heat the iron tip to a temperature suitable for soldering, the temperature of the heating element will become too high and the heating element will seize between itself and the iron tip, making it impossible to attach or remove it, or damage the heating element and its installation. There was an inconvenience that shortened the life of the insulators used for this purpose.

Purpose This idea was created in view of the above circumstances.
The object of the present invention is to provide an electric soldering iron in which a heating element is brought into close contact with a soldering iron tip to reduce the temperature difference between the two, and the heating element can be easily attached and detached from the soldering iron tip.

Structure of the invention This invention is an electric soldering iron in which the soldering iron tip is attached to the handle side via an exterior pipe, and the rear end of the soldering iron has a horizontal surface with the upper half removed.
A plate-shaped heating element is arranged so that its tip overlaps with this horizontal plane and a protective member is attached to the upper surface side, and the heating element whose rear end is pivoted on a horizontal axis in a hollow part inside the handle. Electric solder fixed to the front side of the holding member and provided with a spring on either the heating element holding member or the handle, respectively, that contacts the handle or the heating element holding member and presses the heating element against the horizontal surface of the tip. It's a trowel.

Embodiment In FIG. 1, at the rear end of the iron tip 1, the upper half of the cylindrical body is removed to form a rectangular horizontal surface 1a. The handle 2, which has a hollow part 2a in the axial direction, has a heat-resistant heating element holding member 3 on the opening side near the tip 1, the rear end of which is pivotally supported on the inner wall by a horizontal shaft 3a. A plate-shaped heating element is housed on the front side, and is arranged so that about half of its length overlaps with the horizontal surface 1a of the tip 1, and a stainless steel protection member 5 is attached to the upper surface side. body 4
is fixed.

In this embodiment, the protective member 5 has a rectangular protrusion 5a formed in the widthwise center of a thin stainless steel plate.
The heating element 4 made of ceramic or the like is gripped by the bent gripping part 5b provided at the intermediate part between the tip 1 and the heating element holding member 3, and the heating element 4 is separated from the heating element 4 in front of the heating element holding member 3. A notch 3b and an opening 3 are formed separately in the upper and central parts of the holding member 3.
It goes without saying that other materials may be used to provide a different configuration.

The heating element holding member 3 has a plate spring 6 attached to the notch 3b that presses against the upper inner wall surface of the handle 2, and is pressed downward around the shaft 3a by the biasing force of the spring 6, thereby holding the heating element. The tip of the heating element 4 fixed to the holding member 3 is brought into close contact with the horizontal surface 1a of the soldering tip 1 via the protective member 5 so as not to be damaged. In this case, a gap 17 is provided between the heating element holding member 3 and the lower inner wall surface of the handle 2. The connection between the heating element 4 and the power cord 7 is achieved by arranging horizontal J-shaped leaf spring terminals 8 fixed to the tip of the cord 7 on the lower left and right sides of the fixed side of the heating element 4 (see Fig. 3). ),
This is ensured by its pressing action. 10 is a heating element 4
This is a grounding cord wire connected to the lead wire 9 of.

On the opening side of the handle 2, a lid member 11 is provided with a circular hole through which the heating element 4 can be inserted, in order to prevent the heating element holding member 3 and other items housed in the hollow portion 2a from being seen from the outside. However, multiple screws 13
It is attached to the end face of the handle 2 by. The lid member 11 has rectangular notches 12 formed at intervals in the circumferential direction on the end surface that comes into contact with the handle 2, and a short pipe 14 having a male thread is fixed to the opening on the opposite side of the handle 2. Ru. 15 is a cap nut screwed onto the short pipe 14.

Between the iron tip 1 and the cap nut 15, an inwardly inclined locking surface 16a is formed at one end to be locked by the tapered surface of the iron tip 1, and the other end is in contact with the inner surface of the cap nut 15. A stainless steel exterior pipe 16 is provided with an outward flange 16b that is pressed against the end surface of the short pipe 14. This exterior pipe 16
is fixed from the horizontal surface 1a of the soldering tip 1 to the cylindrical outer peripheral surface of the distal end portion by a caulking 16c.

When the heating element is installed as above, caulking 1
When the soldering iron tip 1, which is integrally fixed by the iron tip 6c, is connected to the opening side of the handle 2 by the cap nut 15 that engages with the base end of the exterior pipe 16, the heating element holding member 3
The leaf spring 6 attached to the iron tip is pressed against the upper inner wall surface of the opening side of the handle 2, and brings the heating element 4 reinforced with the protective member 5 into close contact with the horizontal surface 1a of the tip 1.
The temperature difference between the iron tip 1 and the heating element 4 can be significantly reduced. Therefore, when heating the tip 1 to the same temperature, the heating temperature of the heating element 4 is significantly lowered compared to the conventional case, and the heating element 4 and the tip 1 are heated to the same temperature.
It is possible to prevent seizure between the heating element 4 and the insulator used to attach it to the heating element 4, thereby extending the life of the heating element 4 and the insulator used to attach it.

Furthermore, since plating the horizontal surface 1a of the soldering iron tip 1 is extremely easy, unlike plating the inner wall surface of the recessed hole into which the cylindrical heating element is inserted, it is very easy to do so. Also, the soldering iron tip 1 can be prevented from being oxidized at high temperature and seizing with the heating element 4.
Moreover, the heating element 4 is only superimposed on the horizontal surface 1a of the tip 1, and the spring 6 that presses the heating element 4 against the horizontal surface 1a of the iron tip 1 has its rear end fixed to the heating element 4. Since the iron tip 1 and the heating element 4 are attached to the heating element holding member 3 whose temperature is low, not only is it extremely easy to attach and detach the iron tip 1 and the heating element 4, but also the spring 6 is tempered by the temperature of the heating element 4. There's no fear.

Effects of the invention In this invention, a heating element formed in a plate shape and reinforced by a protective member is fixed to a heating element holding member that is pivotally supported in the hollow part of the handle, and the heating element is attached to the horizontal surface of the iron tip by the biasing force of a spring. Since the soldering iron tip and heating element are made to adhere closely together through polymerization, the temperature difference between the iron tip and the heating element can be reduced, and both can be easily attached and detached.

[Brief explanation of the drawing]

Figure 1 is a longitudinal sectional view of one embodiment of this invention;
The figure is Fig. 1 - sectional view, Fig. 3 is Fig. 1 -
4 is a sectional view taken from FIG. 1, and FIG. 5 is a front view of the main parts. 1...Tip, 1a...Horizontal surface, 2...Handle,
2a...Hollow part, 3...Heating element holding member, 3a...
... shaft, 4 ... heating element, 5 ... protection member, 6 ... spring, 16 ... exterior pipe.

Claims (1)

[Scope of utility model registration request] In an electric soldering iron where the soldering iron tip is attached to the handle side via an exterior pipe, a horizontal plane is formed at the rear end of the iron tip with the upper half removed, and the tip is overlapped with this horizontal plane. A plate-shaped heating element, which is disposed in the handle and has a protective member attached to its upper surface side, is fixed to the front side of a heating element holding member whose rear end is pivoted on a horizontal axis in a hollow part in the handle, An electric soldering iron characterized in that either the heating element holding member or the handle is provided with a spring that contacts the handle or the heating element holding member, respectively, and presses the heating element against the horizontal surface of the tip.