JPS6276178A - Attachment plug - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a plug for use in electrical equipment, electronic equipment, etc.

[Conventional technology]

Examples of conventional plugs include those shown in FIGS. 7 and 8. FIG. 7 shows that after a pair of plug blades 3 are interposed between the upper body 1 and the lower body 2 made of resin molded products,
FIG. 8 shows an insertion plug P assembled by tightening both bodies 1.2 with a set screw 4 and a nut 5, and FIG. 8 shows a pair of plugs 3 integrally molded with vinyl chloride. The plug P2 is shown. In addition, 6 is a cord, 7 is a stopper, and 8 is a molded part.

[Problem that the invention seeks to solve]

However, as shown in FIG. 7 above, in the plug P1 that is assembled by tightening with screws,
Since the upper body 1 and the lower body 2 can be formed from relatively hard resin molded products, although the plug P1 itself has a certain degree of heat resistance, it takes time to assemble it by tightening it with screws etc. In addition, there are drawbacks such as poor manufacturing efficiency, the possibility of the tightening part loosening during use, and weak strength of the plug P1 itself, as well as insufficient adhesion between the two bodies 1.2. It has the disadvantage of lacking water resistance and moisture resistance.

In addition, as shown in FIG. 8 above, in the plug P2 integrally molded with resin, the resin flows smoothly during integral molding, and the cord portion 6a closest to the plug P2 is coated with a predetermined amount or more. Since flexibility (flexibility) is required, it is not possible to use a very hard resin, and since soft vinyl chloride is used, the heat resistance of the plug P2 itself is poor, and when the temperature exceeds about 60℃. There is a disadvantage that the molded portion 8 becomes soft and easily deformed.

On the other hand, after fixing the insulating wall between the attachment part of the plug blade and the plug blade to a core made of resin with excellent heat resistance, or after integrally molding it with heat-resistant resin, it is reused with soft vinyl chloride. Molding may be considered, but doing so would increase the number of production steps and production costs, which is not preferable. Further, it is possible to provide a protector part 9 on the cord side of the plug P2, but if this protector part 9 is too hard, its effect will not be as expected.

The present invention has been made with the above-mentioned considerations in mind, and its purpose is to have excellent heat resistance, water resistance, and moisture resistance.
The purpose is to provide a mechanically robust plug.

[Means for Solving the Problems] In order to achieve the above-mentioned object, the plug according to the present invention is a container in which a pair of plug blades are combined with an upper body and a lower body made of resin with excellent heat resistance. The body is housed within the body and both bodies are joined to each other by ultrasonic welding.

[Effect]

In the above characteristic configuration, since the upper body and the lower body are joined to each other by ultrasonic welding, both bodies are reliably bonded and there is no risk of disassembly.
Since there are no gaps, the water and moisture resistance of the plug is greatly improved. Moreover, since both bodies are made of molded parts made of resin with excellent heat resistance, the strength at high temperatures does not deteriorate, and a robust plug can be obtained. Furthermore, since the two bodies are joined simply by applying ultrasonic vibration, manufacturing costs can be significantly reduced.

〔Example〕

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is an exploded perspective view of the plug P according to the present invention, in which 11.12 is an upper body and a lower body made of thermoplastic resin molded products with excellent heat resistance, and 13.14 is an exploded perspective view of the plug P according to the present invention.
are a pair of plug blades interposed between these two bodies 11 and 12.

Examples of the thermoplastic resin include ABS.

AS, polystyrene GP, polystyrene Hl polycarbonate, polyamide (nylon), polysulfone,
Examples include polyacetal, acrylic, polypropylene, and hard vinyl chloride. Note that if glass fiber is mixed into these resins, the heat resistance and mechanical strength will be further improved.

The upper body 11 and the lower body 12 have the same size and the same shape (symmetrical), and the concave chamber 16 in the approximate center of the main body 15 has protrusions 17, 18, . Partition block 20 with recess 19
is formed. The pair of plug blades 13.14 are the second
As shown in the figure, the projecting pieces 21 and 22 are set in the recess 16 of the lower body 12 with the protrusions 21 and 22 fitted into the recess 19. The plug blades 13, 14 and the core wire 23a of the cord 23 are connected by crimping, soldering, or the like.

Reference numerals 24 and 25 denote cutout grooves formed in the front wall 26, into which the plug blades 13 and 14 are fitted and protrude to the outside. 27 is a cord opening, and the opening end thereof has a gentle curved portion 2 formed therein. Slightly inward of the cord opening 27, a cord holding portion 29 is provided which is comprised of a plurality of protrusions 29a and 29b arranged alternately in two rows on the left and right. Note that this cord holding part 29 is attached to the upper body 11 as shown in FIG. The lower bodies 12 are configured to press the cords 23 alternately.

Reference numeral 30 denotes a retaining portion formed on the plane of the side wall 31, and as shown in FIG. 30b are formed respectively.

To assemble the plug P, insert the pair of plug blades 13 and 14 connected to the tip of the cord 23 into the lower body 12.
set in a predetermined position, and cover the upper body 11 over it. At this time, both bodies 11, 12 are engaged with each other at the retaining portion 30. When ultrasonic vibrations are applied to the engagement portion in this state, the two bodies 11, 12 are ultrasonically welded and are completely joined and integrated.

In the plug P assembled in this way, the upper body 11 and the lower body 12 are joined in close contact with each other at the engaging portion 30, so moisture and moisture will not enter into the body. , water resistance and moisture resistance are improved. Since a gentle curved portion 28 is formed in the cord opening 27, the cord 23 is inserted along this curved portion 28.
The cord 23 can be bent easily, and therefore the core wire within the cord 23 is less likely to break.

Further, a cord presser 29 is provided near the cord opening 27, and the plug blades 13 and 14 are inserted into the recess 19 of the bulkhead block 20.
The cord 23 and the plug blades 13 and 14 inside the plug P are fixedly held by fitting the projecting pieces 21 and 22 inside.
This eliminates wobbling and provides an extremely mechanically robust plug.

Further, since the upper body 11 and the lower body 12 can be easily joined by applying ultrasonic vibration, production efficiency is increased, mass production becomes possible, and costs can be reduced.

FIG. 5 shows another embodiment of the present invention, in which the front wall 33 of one body (lower body 32) is connected to the other body.
The cutout grooves 36 and 37 are made larger than that 35 of the upper body 34, and only in the front wall 33 of the lower body 32 are cutout grooves 36 and 37 for inserting the plug blade.
was formed. In this case, the plug blade is completely accommodated in the notch /s36°37 formed in one body, so even if the upper body 34 and the lower body 32 are aligned, an unreasonable pressing force is applied to the plug blade. The blade can be reliably held in a predetermined position without any damage, and both bodies 32 and 34 can be reliably fitted together without damaging the retaining portion 38.

FIG. 6 shows still another embodiment of the present invention, in which an engagement recess 40.41 is formed in the vertical direction of the plug blade 39, and this engagement recess 40.41 is connected to the projection of the upper body 42.43. Part 44゜4
5.

〔Effect of the invention〕

As explained above, the plug according to the present invention houses a pair of plug blades in a container combining an upper body and a lower body made of resin with excellent heat resistance, and ultrasonically welds the two bodies. Since both bodies are bonded to each other, there is no risk of them coming apart, and
Since there are no gaps, water resistance and moisture resistance are greatly improved. or,
Since both bodies are made of molded products made of resin with excellent heat resistance, the strength of the plug does not deteriorate at high temperatures, and a robust plug can be obtained. Furthermore, since the two bodies are joined simply by applying ultrasonic vibration, manufacturing costs can be significantly reduced.

[Brief explanation of drawings]

Fig. 1 is an exploded perspective view of the plug according to the present invention, Fig. 2 is a plan view showing the state in which the plug blade is inserted into the lower body, and Fig. 3 is a portion showing the joined state of the upper and lower bodies. 4 is a side sectional view of the upper body and lower body, FIG. 5 is a perspective view showing another embodiment of the present invention, and FIG. 6 is a(1, 3,14,39...Bung blade, 11
．． 34.42... Upper body, 12°32, 43...
lower body.

Claims (1)

[Claims] An insertion plug characterized in that a pair of plug blades is housed in a container combining an upper body and a lower body made of resin with excellent heat resistance, and the bodies are joined to each other by ultrasonic welding.