JPH064552Y2 - plug - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a plug, and in particular, to eliminate noise generated by vibration (or shock) from the outside reaching the inside of the plug and vibrating the core wire. The present invention relates to a plug suitable for use in an audio device.

[Outline of device]

The plug of the present invention includes a first conductive pipe, a central contact and an annular contact, a contact portion fitted to an inner circumference of the first conductive pipe, and a first conductive pipe. A plug having a second conductive pipe fitted to the circumference and having one end in contact with the annular contact of the contact portion, the third conductive member being concentrically arranged on the outer circumference of the first conductive pipe. Pipe and this third
Is provided between the conductive pipe and the first conductive pipe, and an elastic support ring is provided to prevent external vibration applied to the third conductive pipe from being transmitted to the core wire. It is a thing.

[Prior Art] A pin plug shown in FIG. 3 will be described as an example of a conventional plug. In FIG. 3, reference numeral 1 is a first conductive pipe made of, for example, aluminum, and a contact in which a central contact 2 and an annular contact 3 are attached to a synthetic resin mold body 4 on the inner periphery of the first conductive pipe 1. The part 5 is fitted. A second conductive pipe 6 made of, for example, aluminum is fitted to the inner circumference of the first conductive pipe 1. The tip of the core wire 8 of the cord 7 inserted from one end of the second conductive pipe 6 is inserted into the center contact 2 and fixed to the center contact 2 by the first screw 9. The shield wire 10 of the cord 7 is inserted between the locking portion 3a formed at one end of the annular contact 3 and the pressing portion 6a formed at one end of the second conductive pipe 6, so that the cord 7 is It is fixed to the second conductive pipe 6 by means of two screws 11. In addition,
Reference numeral 12 is a spacer that fills the space between the cord 7 and the second conductive pipe 6.

[Problems to be solved by the device]

In the plug having the structure shown in FIG. 3 described above, when an external shock is applied to the first conductive pipe 1 at the time of wiring,
There is a drawback that the core wire 8 vibrates to generate noise.

Further, there is a drawback that a sufficient shielding effect cannot be obtained against noise such as hum of a human body induced in the first conductive pipe 1.

Therefore, it is an object of the present invention to provide a plug that improves the above drawbacks.

[Means for Solving the Problems]

The plug of the present invention includes a first conductive pipe, a central contact and an annular contact, a contact portion fitted to an inner circumference of the first conductive pipe, and a first conductive pipe. A plug having a second conductive pipe fitted to the circumference and having one end in contact with the annular contact of the contact portion, the third conductive member being concentrically arranged on the outer circumference of the first conductive pipe. Pipe and this third
An elastic support ring is provided between the electrically conductive pipe and the first electrically conductive pipe.

[Action]

In the plug of the present invention, the third conductive pipe is concentrically arranged on the outer periphery of the first conductive pipe, and the elastic support ring is provided between the third conductive pipe and the third conductive pipe so that the third conductive pipe is externally connected. Since the shock or vibration applied to the pipe is blocked by the support ring, the core wire does not vibrate and generate noise.

In addition, since the core wire of the plug of the present invention is doubly shielded by the first conductive pipe and the third conductive pipe, the plug is resistant to noise such as hum of the human body induced in the third conductive pipe. The shield effect can be improved.

〔Example〕

An embodiment of the present invention will be described below with reference to the drawings (note that the same parts as those of the conventional example shown in FIG.
The same numbers are given and detailed explanations thereof are omitted).

FIG. 1 is a sectional view of a pin plug showing an embodiment of the plug of the present invention. In FIG. 1, reference numeral 15 denotes a third conductive pipe, which is made of, for example, aluminum, and the third conductive pipe 15 is arranged concentrically on the outer periphery of the first conductive pipe 1. Reference numeral 16 denotes an elastic first support ring made of, for example, rubber, in which a step portion 16a for supporting one end of the third conductive pipe 15 is formed, and is fitted to the outer periphery of the first conductive pipe 1. . Reference numeral 17 denotes a second supporting ring having elasticity, such as rubber, which has a step portion 17a for supporting the other end of the third conductive pipe 15 and is fitted to the outer periphery of the first conductive pipe 1. There is. Therefore, the step 16 of the first support ring 16
a and a third conductive pipe on the step 17a of the second support ring 17
By fitting both ends of 15, the third conductive pipe 15
A space d is formed between the first conductive pipe 1 and the first conductive pipe 1, and both can be arranged concentrically. Reference numeral 18 is a reinforcing ring for the first support ring 16.

Next, the assembly when the above-mentioned configuration is added will be described with reference to FIG. In FIG. 2, after the core wire 8 of the cord 7 is drawn out through the through hole 6b of the second conductive pipe 6 to the central contact 2 of the contact portion 5 to which the central contact 2 and the annular contact 3 are attached, the first screw Fix with 9. On the other hand, like the core wire 8, the shield wire 10 of the cord 7 is led out through the through hole 6b of the second conductive pipe and then spread outward. Then, the contact in which the core wire 8 is fixed to the inner circumference of the first conductive pipe 1 in which the third conductive pipe 15 is concentrically arranged by the first support ring 16 and the second support ring 17. Fit the part 5. Further, the second conductive pipe 6 is fitted to the first conductive pipe 1 and the second screw is attached to the female screw 1a of the second conductive pipe.
Screw the male screw 6c of the conductive pipe 6 of
10 is provided at one end of the annular contact 3 and a second engaging portion 3a
The engaging portion 3a and the pressing portion 6a are brought into contact with each other while being sandwiched between the pressing portions 6a of the conductive pipe 6.

According to the above configuration, the third conductive layer is formed on the outer circumference of the first conductive pipe.
The conductive pipes 15 are arranged concentrically with each other, and are arranged between the third conductive pipe 15 and the first conductive pipe 1 respectively, and the elastic first support ring 16 and second support ring 16 are provided. By providing the ring 17, when a shock or vibration from the outside is applied to the third conductive pipe 15 at the time of wiring, it is blocked by the elastic first support ring 16 and second support ring 17, The core wire 8 does not vibrate to generate noise.

Further, since the core wire 8 of the cord 7 is doubly shielded by the first conductive pipe 1 and the third conductive pipe 15,
It is possible to improve the shield effect against noise such as hum of the human body induced in the third conductive pipe 15.

In the embodiment shown in FIG. 1, the first conductive pipe 1 and the third conductive pipe 15 are made of aluminum, but they may be anodized.

Aluminum has an excellent shielding effect against low frequency noise and brass has a high shielding effect against high frequency noise. Therefore, the first conductive pipe 1 is made of brass and the third conductive pipe is made of brass.
When 15 is made of aluminum, a good shielding effect can be obtained by combining the respective frequency vs. noise shielding effects.

Furthermore, in the embodiment shown in FIG. 1, the first elastic pipe 15 has elasticity between the third conductive pipe 15 and the first conductive pipe 1.
Although the support ring 16 and the second support ring 17 are separately provided, they may be integrally formed. In this case, a connecting portion (not shown) having the thickness of the gap d between the third conductive pipe 15 and the first conductive pipe 1 is provided, and the first support ring 16 and the second support ring 17 are integrated. Can be converted.

Further, in the embodiment shown in FIG. 1, the case where the present invention is applied to the pin plug has been described, but the present invention can be applied to the standard plug or other small plugs used for connection between the audio devices.

As is apparent from the above description, the plug of the present invention is the first
Of the conductive pipe 1, the center contact 2 and the annular contact 3 are fitted to the inner periphery of the first conductive pipe 1 and the contact portion 5 fitted to the inner periphery of the first conductive pipe 1. In a plug having a second conductive pipe 6 that fits and has an end contacting the annular contact 3 of the contact portion 5, a third concentrically arranged outer periphery of the first conductive pipe 1 is provided. An electrically conductive pipe 15 and elastic support rings 16 and 17 disposed between the third electrically conductive pipe 15 and the first electrically conductive pipe 1.
Vibrations from the outside can be reliably prevented, and the shield effect can be improved.

[Advantage of the Invention] Since the plug of the present invention is provided with the support ring, it is possible to remove noise generated by vibration or shock from the outside reaching the inside of the plug and vibrating the core wire.

In addition, the plug of the present invention has a double shield structure against the noise mixed in the plug such as the induction hum of the human body, so that the shield effect can be improved.

[Brief description of drawings]

FIG. 1 is a sectional view showing the structure of the present invention plug, FIG. 2 is a perspective view showing an assembled state of the present invention plug, and FIG. 3 is a sectional view showing an example of a conventional plug. 1 ... First conductive pipe 2 ... Center contact 3 ... Ring contact 3a ... Locking part 4 ... Molded body 5 ... Contact part 6 ... Second conductive pipe 6a ... Pressing part 7 …… Code 8 …… Core wire 10 …… Shield wire 12 …… Spacer 15 …… Third conductive pipe 16 …… First support ring 16a …… Step portion 17 …… Second support ring 17a …… Step Part 18 ... Reinforcing ring

Claims (1)

[Scope of utility model registration request] 1. A first conductive pipe, a contact portion to which a central contact and an annular contact are attached, and which is fitted to an inner circumference of the first conductive pipe, and an inner circumference of the first conductive pipe. And a second conductive pipe having one end in contact with the annular contact of the contact portion, the third conductive pipe being concentrically arranged on the outer circumference of the first conductive pipe. And a support ring having elasticity arranged between the third conductive pipe and the first conductive pipe.