JPS5812389Y2 - Connectors for audio equipment - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a connector for audio equipment, and particularly provides a circular connector for audio equipment (commonly called a DIN connector or a recording/playback connector).

A conventional DIN connector has a main body that is integrally molded into an X-cylindrical shape, and a U-shaped signal ground contact and a dog-shaped shield contact piece are separately provided for each insertion hole provided in the main body. It has a structure inserted into.

Therefore, although the ground contact and the shielding contact piece are used as separate components, they are electrically short-circuited to each other when mounted on an audio device.

Then, a nearly cylindrical plug is inserted into this connector, the grounding pin of this plug elastically contacts the grounding contact on the connector side, and the shielding cover of the plug also elastically contacts the shielding contact piece on the connector side. come into contact with.

However, due to the complicated structure of such connectors, the cost of component materials, assembly, and management (for example, maintaining the shape of the shielding contact piece) is high, and when mounting on audio equipment, it is difficult to make a ground contact. This method has a disadvantage in that it is necessary to short-circuit the shielding contact piece and the shielding contact piece through a lead wire, which increases the cost.

The present invention was devised to correct the above-mentioned defects, and includes a substantially U-shaped ground contact into which the ground pin of the plug is inserted by punching a conductive material;
A sounder in which a ground terminal, which is integrally formed with a shielding contact piece that is positioned on the side of the ground contact and contacts the shielding cover of the plug, is inserted into an insertion hole of a main body molded from resin. This relates to connectors.

By configuring in this way, the number of parts is reduced and the structure is simplified, so that costs can be reduced.

Next, an embodiment in which the present invention is applied to a DIN connector will be described with reference to the drawings.

1. First, the configuration of the ground terminal 1 according to this embodiment will be explained with reference to FIG.

This ground terminal 1 is formed by punching a relatively inexpensive conductive material (e.g., brass), and is entirely surface-treated (e.g., nickel plating), into which the ground pin of the plug described later is inserted. Each of the plugs includes a U-shaped ground contact 2 and a shielding contact piece 3 that is integrally formed at the side of the ground contact and comes into contact with a shielding cover of a plug, which will be described later.

The earth contact 2 is composed of a pair of elastic pieces 4 and 5 that face each other and are elastically deformable both outwardly and inwardly, and have curved contact portions 6 and 7 on the inside of their tips. It is provided.

In addition, it is extremely important that the shielding contact piece 3 is formed integrally with the ground contact 2, and is not bent in a dogleg shape as in the past, but extends vertically but laterally. It is configured to be elastically deformable.

Further, a contact portion 8 protruding in a curved shape is provided inside the tip portion of the shielding contact piece 3.

Furthermore, stepped portions 9 and 10 are formed on the lower surface of the ground terminal 1, and the stepped portion 9 is used for attaching the ground terminal 1 to a connector body, which will be described later.

At the bottom of the ground terminal 1, a long connecting pin 11, which is used for wiring a printed circuit board, for example, is formed.

Next, a connector incorporating the ground terminal 1 constructed as described above will be explained with reference to FIGS. 2 to 4.

Although only the main parts of the connector 12 are shown in FIGS. 2 and 3, this connector includes a cylindrical (round) main body 13 that is entirely molded from resin. There is.

This main body has insertion holes 14, 15, 1 each having a keyhole-shaped cross section for inserting the ground pin and other pins of the plug, which will be described later.
6.degree. 17.18 are provided vertically through the tube at predetermined intervals.

Further, around each of these insertion holes, a ring-shaped groove 19 is provided for inserting a shield cover of a plug, which will be described later.

Further, on the bottom surface of the main body 13, an insertion hole 24 for inserting the shielding contact piece 3 of the ground terminal 1 is provided so as to communicate with the above-mentioned groove 19.

Further, a circular protrusion 20 used for fixing the ground terminal 1 is integrally formed, and the tip surface of this protrusion is curved, and a ring-shaped protruding step part 21 that can be elastically deformed to some extent is formed around this protrusion. It is set in.

Then, the ground terminals 1 and 1 are inserted into the connector 12 from below, but at this time, the ground contact 2 is inserted into the insertion hole 16 and the shield contact piece 3 is inserted into the insertion hole 24, for example. Ru.

After the ground contact 2 is inserted until the flat part 22 between the elastic piece 6 and the shield contact piece 3 comes into contact with the main body 13,
While holding the ground terminal 1 with your fingers, press the protrusion 20 on the main body 13.
A baking plate 23 for fixing the terminal is fitted into the ground terminal 1 from below by a click action, and this baking plate 23 is attached to the ground terminal 1.
It is tightly fitted into the stepped portion 9 of the.

As a result, the baked plate 23 is fixed around the protrusion 20, and the ground terminal 1 is pressed and fixed to the connector body 13 by the baked plate 23, and the ground contact 2 and shielding contact piece 3 of the ground terminal 1 are inserted into the insertion hole. 16 and the insertion hole 24.

The bake plate 23 has a shape shown in FIG. 4, for example, and has a circular hole 25 in the center thereof into which the protrusion 20 of the connector body 13 is fitted.

The diameter of this circular hole 25 is formed to be smaller than the diameter of the tip of the protrusion 20. In other words, due to the presence of the step 21 of the protrusion 200, it is difficult to fit the bake plate 23 into the protrusion 20 at 11. When pressed, the stepped portion 21 is pressed against the inner circumferential edge of the baking plate 23 and elastically deforms upward, whereby the baking plate 23 is fitted into the stepped portion 21 at once.

Further, in this case, since the protrusion 20 has a curved surface shape, the baking plate 23 can be easily fitted into the protrusion 20.

After this fitting, the stepped portion 21 elastically restores to its original state (the state shown in FIG. 3), so the restored stepped portion 21 prevents the baking plate 23 from coming off the protrusion 20, and therefore the ground terminal 1 is fixed to the connector main body 13 in a desired state.

Note that the other insertion holes 14°15.17 of the connector body 13,
18, another terminal 35 shown in FIG. 6 is fixed in the same manner as described above.

In this way, the connector 12 including the ground terminal 1 is assembled and mounted at a predetermined location.

In use, a connector plug 26 as shown in FIG. 5 is inserted into the connector 12 and electrically connected.

This plug 26 has a terminal 2 corresponding to the above-mentioned ground terminal.
7, and each of these terminals has connection pins 2B, 29,
30 passes through the main body 31 and is coupled to the main body 31.

A shielding cover 32 is attached around this main body in a cylindrical shape, and a cap 33 is attached around this cover.
covered with.

A bushing 34 is provided at the center of the end of the cap 33, and grounding and line conducting wires are led inside this bushing.

The plug 26 is then inserted into the connector 12 shown in FIGS. 2 and 3. At this time, the shielding cover 32 of the plug 26 is inserted into the groove 19 of the connector 12, and the shielding contact piece described above is inserted into the groove 19 of the connector 12. 3 and presses it outward to elastically deform it, and the elastic force of the shielding contact piece 3 connects the contacting part 8 and the shielding cover 32 electrically tightly.

Further, each connecting pin 28, 29, 30 of the plug 26 is inserted into each insertion hole 14-18 of the connector 12.

Among these, the connecting pin for grounding enters between both elastic pieces 4 and 5 of the earthing contact 2, and elastically deforms these elastic pieces outward.

As a result, the elastic force of the elastic pieces 4.degree. 5 acts, causing the contact portions 6, 7 to bite the connection pins 28, 29, 30, respectively, thereby electrically connecting the two.

As explained above, according to this embodiment, the ground contact 2 and the shield contact piece 3 are integrally molded, so the number of parts is reduced compared to conventional connectors, and the structure is extremely simple. Therefore, assembly and management of the connector becomes easy, and there is no need for short-circuit wiring between the contact piece and the earth contact as in the conventional case, and a large cost reduction can be achieved.

Since the earth terminal 1 according to this embodiment can be manufactured only by punching, there is no need to specifically bend the shielding contact piece as in the past, and it is extremely convenient in terms of manufacturing and management. can.

Therefore, the shielding contact piece can ensure stable and appropriate electrical contact with the shielding cover without bending, so the earth terminal can be made of relatively inexpensive brass, and the surface treatment can be nickel plating. No special management is required to maintain the shape.

Although the present invention has been described above based on one embodiment, it will be understood that the present invention is not limited to this embodiment and can be further modified based on the technical idea.

For example, the shape of the ground terminal may be changed, and the ground contact 2 and the shielding contact piece 3 may be provided at positions further apart from each other, and their shapes are not limited to the above-mentioned example.

Moreover, the shape of the connector 12 is not limited to a round shape, and it goes without saying that it may be polygonal, for example.

The present invention is applicable to various audio equipment such as receiver amplifiers, and is applicable not only to printed circuit board wiring but also to lead soldering wiring and lead wrapping wiring.

As mentioned above, the present invention uses a punching process of conductive material.
The shielding contact piece, which is located on the side of the almost U-shaped earthing contact into which the plug's earthing bin is inserted and contacts the plug's shielding cover, is integrally formed, reducing the number of parts and simplifying the structure. Therefore, costs can be reduced in terms of constituent materials, assembly, and management, and there is no need for conventional short-circuit wiring, which improves workability.

In addition, by positioning the shield contact piece on the side of the ground contact and integrating it by punching, the elasticity of the shield contact piece itself based on the supporting action of the ground contact can be effectively utilized. Expensive materials, surface treatments, and special controls are no longer required for the shield contact piece to make contact with the shield cover.

[Brief explanation of the drawing]

The drawings show an embodiment in which the present invention is applied to a DIN connector, in which Fig. 1 is a front view of the ground terminal, Fig. 2 is a plan view of the connector, and Fig. 3 is a section of ■-■ in Fig. 2. 4 is a front view of the baking plate, FIG. 5 is a sectional view of the connector plug, and FIG. 6 is a front view of other terminals. In addition, in the symbols used in the drawings, 1 is the ground terminal, 2 is the ground contact, 3 is the shield contact piece, and 12
is a connector, 23 is a baking plate, 26 is a connector plug,
32 is a shield cover.

Claims (1)

[Scope of utility model registration request] A roughly U-shaped ground contact into which the plug's grounding bottle is inserted is formed by punching a conductive material, and a shielding contact piece that is placed on the side of this grounding contact and contacts the plug's shielding cover is integrated. A connector for a sounder in which a ground terminal formed in the above is inserted into an insertion hole in a main body molded from resin.