JPS5917101Y2 - jack - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a jack used for example in audio products, and is intended to provide a jack that is particularly inexpensive and has high product value.

As shown in FIG. 1, a jack generally consists of a jack body 1 made of an insulating material and a cap 2 attached to the end of the main body 1. A plug (not particularly shown) is inserted into the cap 2. , the contact portion of the plug is configured to come into contact with a contact piece installed in the jack body 1 to establish an electrical connection.

The base 2 is generally attached to the outside of the device so as to be exposed, so it is made to look good.

For this purpose, the cap 2 is usually made of a metal pipe, and a chamfered surface 3 is formed on the periphery of its tip by cutting.

On the other hand, since the cap 2 is used as a contact portion with the ground conductor of the plug, a terminal 4 is attached to the cap 2 by caulking as shown in FIG.

As described above, since the cap 2 is conventionally made from a metal pipe, the manufacturing of the cap 2 is troublesome and processing costs are high.

Another disadvantage is that the number of parts increases because the two parts, the base 2 and the terminal 4, have to be made separately.

Furthermore, there is a risk of a poor contact accident occurring at the caulked portion.

The purpose of this invention is to provide a jack that is inexpensive, has a good appearance, and is easy to manufacture.

FIG. 3 shows an embodiment of this invention.

In FIG. 3, parts corresponding to those in FIGS. 1 and 2 will be described with the same reference numerals.
is formed by pressing, the cap 2 and the terminal 4 are integrally formed, and a chamfered surface 3 is applied to the periphery of the tip end of the cap 2 by cutting.

[In this example, a rectangular flange 5 is formed on one end side of the metal piece 2, and retaining protrusions 6-6 are formed on two mutually parallel sides of the flange 5.

Incidentally, a method for manufacturing the base 2 and the terminal 4 will be explained.

First, a cup-shaped body is formed on a band-shaped metal plate by pressing.

This cup-shaped body is formed by being gradually squeezed out using a plurality of male dies having different diameters.

After the cup-shaped body is formed, the bottom of the cup is removed, and the outer periphery of the tip of the cup and the inner periphery of the hole formed by removing the bottom are chamfered. At the same time as punching, the end F4 portion is punched and bent, and the band-shaped metal plate is separated into i9 parts.

After this separation, plating treatment is performed. As shown in FIG. 5, one end surface of the jack body 1 has a groove 7-7 into which the flange 5 is inserted, and a hole 8 on the surface between the grooves 7-7.

Furthermore, a notch 9-9 is formed in the middle of the groove 7-7, and a protrusion 6-6 formed on the flange 5 is engaged with this notch 9-9 to prevent it from coming out, thereby attaching the cap 2 to the jack body 1. to lock.

As explained below, according to this invention, the cap 2 and the terminal 4 are integrally formed from a metal plate by pressing, and therefore can be manufactured easily and inexpensively.

However, since the chamfered surface 3 is formed on the outer circumferential edge of the tip of the metal 2, it can have the same appearance as a cap made from a conventional pipe.

Furthermore, since the base 2 and the terminal 4 can be made integrally, the number of parts can be reduced, and a highly reliable jack can be obtained without causing contact failures between them.

[Brief explanation of the drawing]

Figure 1 is a perspective view to explain a commonly used jack, Figure 2 is a cross-sectional view to explain the structure of the base used in a conventional jack, and Figure 3 is a diagram of a jack based on this invention. FIG. 4 is a side view for explaining the structure of the base used, FIG. 4 is a front view thereof, and FIG. 5 is a perspective view showing the jack body used in the jack according to this invention. 1... Jack body, 2... Base, 3... Chamfered surface, 4... Terminal, 5... Flange, 6... Engagement projection, 7... Groove, 9... Notch .

Claims (1)

[Scope of Claim for Utility Model Registration] A: A metallic cap formed into a cylindrical shape by pressing; B: A metallic flange integrally formed at one end of the cap; C: Projecting from this flange and integrally formed. D. A chamfered surface formed by cutting the periphery of the tip side of the gold, E. An engaging protrusion formed on the periphery of the flange, F. Forming the engaging protrusion of the flange. A jack body made of an insulating material and having a pair of opposing grooves through which the two sides are inserted, and a notch that engages with the engaging protrusion formed in the middle of the pair of grooves.