JPS6042472Y2 - Device to prevent plugs from coming off in jacks of light electrical equipment - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an improvement in a device for preventing unplugging of a plug in a jack of a light electrical device.

In order to maintain a good connection state of the plug inserted into the jack part of the adapter plug or the socket of the jack of a radio, etc., and to prevent the plug from being pulled out by pulling the cord connected to the plug, Even if force is applied,
In order to firmly hold the inserted plug, it has been known to provide a removal stop device in the socket of the jack to hold the inserted plug, but the conventional removal method During use, the locking device gradually loses its grip on the plug, resulting in poor durability.Moreover, it is troublesome to manufacture and assemble.

The purpose of the present invention is to propose a new means to solve these problems.

A means of the present invention to achieve this objective is to provide a cylindrical coil spring accommodating portion with an inner diameter larger than that of the plug insertion hole immediately inside the plug insertion hole provided in the socket fitting of the jack. A coil panel, which is made by spirally winding a metal wire with spring properties and an inner diameter larger than the plug insertion hole and an outer diameter corresponding to the inner diameter of the coil spring accommodating part, is fitted into a part of the coil spring in the accommodating part. The present invention is characterized in that a small diameter portion having a somewhat larger diameter than the outer sleeve of the plug inserted into the plug insertion hole is formed eccentrically with respect to the axis of the plug insertion hole.

Next, embodiments will be described in detail with reference to the drawings.

In FIG. 1, a indicates a jack portion of an adapter plug A formed into three poles, and is provided with a socket fitting 1 made of a metal material on the rear end side (right end side in the figure).

Reference numeral 2 denotes an outer cylindrical sleeve made of a metal material which serves as the outer pole of the jack part a, the front end side of which is connected to the outer cylindrical sleeve 2a of the plug part, and the rear end side of which the socket fitting 1 is fitted. There is.

3 is an insulating material formed into a sleeve shape from a synthetic resin material and fitted inside the outer cylinder sleeve 2; 4 is a spring plate disposed in the inner cavity of the insulating material 3 and assembled to the jack portion a; The front end side is connected to the intermediate sleeve 4a which becomes the second pole of the plug part.

Reference numeral 5 denotes a connecting terminal piece made of a spring plate arranged in the inner cavity of the cylindrical insulating material 3 and assembled to the jack part a so as to form a pair with the connecting terminal piece 4, and the front end side is attached to the plug part. It is connected to the chip 5a at the front end of.

In FIG. 2, W is a cylindrical coil spring accommodating portion provided inside the plug insertion hole 10 formed in the socket fitting 1, and is fitted into the rear end of the aforementioned outer cylinder sleeve 2 of the socket fitting 1. By enlarging the diameter of the plug insertion hole 10 at the inner end thereof, it is formed integrally and continuously with the socket fitting 1.

The inner diameter of the coil spring accommodating portion W is
A step 1 formed between the plug insertion hole 10 and the plug insertion hole 10 is
It is set to be larger than the diameter of a metal wire forming a coil spring 6, which will be described later.

The above-mentioned coil spring 6 inserted into the above-mentioned coil spring accommodating part W
is formed by winding a springy metal wire such as a steel wire into a coil shape, and the inner diameter of the wire is larger than the plug insertion hole 10, and the outer diameter corresponds to the inner diameter of the coil spring accommodating portion W. It is formed.

A part of the coil spring 6 has a diameter slightly larger than the outer diameter of the outer cylindrical sleeve 2b of the plug B inserted into the plug insertion hole 10 as shown by the chain line in FIG. A small diameter portion 6a is formed, and this small diameter portion 6a is a socket whose axis [center] coincides with the axis of the coil spring 6 as shown in FIG. It is formed to be connected to the coil spring 6 eccentrically with respect to the axis of the plug insertion hole 10 of the metal fitting 1.

In the embodiment shown in FIG. 2, one small-diameter portion 6a formed in a part of the coil spring 6 is provided in the middle of the coil spring 6 in the axial direction (continuous direction of the metal wire). However, as shown in FIG. 3, a plurality of them may be provided.

Further, as shown in FIG. 4, the coil spring 6 may be provided at both ends (or one end in some cases) in the axial direction.

Further, even when a plurality of small diameter portions 6a are provided at intermediate portions of the coil spring 6 in the above direction, the small diameter portion 6a is located between the large diameter portions 6b as in the embodiment shown in FIG. In some cases, there may be a plurality of them sandwiched together.

Next, in FIGS. 7 and 8, the socket fitting 1 is connected to the outer cylinder sleeve 2.
When fitting the outer cylinder sleeve 2 into the opening on the rear end side,
By forming the length of the inner end of the socket fitting 1 that is fitted into the inner end of the socket fitting 1, the length of the inner end of the socket fitting 1 fitted into the opening on the rear end side of the outer cylinder sleeve 2 can be adjusted. (front end side) end surface 1a,
A space in which the coil spring 6 is accommodated is formed between the outer sleeve 2 and the rear end surface 30 of the cylindrical insulating material 3 that is fitted inside the outer sleeve 2, and this space serves as a coil spring accommodating portion W. An example is shown.

In this embodiment, the peripheral wall of the coil spring accommodating portion W is the inner peripheral surface of the outer cylinder sleeve 2, and this coil spring accommodating portion W
The coil spring 6 housed in the coil spring 6 is formed such that the outer diameter of its large diameter portion 6b corresponds to the inner diameter of the outer cylindrical sleeve 2.

Further, the small diameter portion 6a may be formed so as to be embraced by the large diameter portion 6b.

Further, the means of the present invention is not limited to the jack part a of the adapter plug A, but can be implemented as it is in a jack assembled into the body of an audio device such as a radio.

Next, to explain the function and effect, the device for preventing plug removal from a jack according to the present invention having the above-mentioned structure is such that when the plug B is inserted into the plug insertion hole 10 of the socket fitting 1 of the jack, the plug B outer cylinder sleeve 2b
However, when the coil spring 6 is inserted into the inner cavity of the coil spring 6 which is fitted into the coil spring accommodating portion W provided inside the plug insertion hole 10 of the socket fitting 1, the The small diameter portion 6a is forcibly inserted into the inner cavity of the small diameter portion 6a which is eccentric with respect to the axis of the plug insertion hole 10.
a is forcibly moved in a direction perpendicular to the axis line against the springiness of the metal wire of the coil spring 6.

From this, when the plug B is inserted into the plug insertion hole 10 serving as the socket of the socket fitting 1, the outer circumferential surface of the outer sleeve 2b of the plug B is eccentric due to the spring property of the small diameter portion 6a of the coil spring 6. By the force of trying to return to the old position,
The small diameter portion 6a is pressed against the inner circumferential surface of the small diameter portion 6a and is held in place, so that even a small amount of force in the pulling direction is applied to the inserted plug B to firmly hold it so that it will not escape.

In addition, since the outer circumferential surface of the coil spring 6 that holds the plug B is in a state where it is pressed against the inner circumferential surface of the socket fitting 1 or the outer sleeve 2, the inserted plug B The connection state of the outer cylinder sleeve 2b, which is the outer pole of the connector, to the jack is ensured.

Thus, the coil spring 6, which acts to hold the inserted plug B and to reliably maintain its connected state, is arranged so that the outer cylindrical sleeve 2b of the plug B inserted into the socket fitting 1 is inserted into the socket. Since the diameter of the plug insertion hole 10 provided in the metal fitting 1 is large enough to accommodate the diameter, the outer sleeve 2b of the plug B can move in the axial direction and in the direction orthogonal to the socket metal fitting 1. The small diameter portion 6a of the coil spring 6, which is wrapped around the outer circumferential surface of the plug B, simply swings relative to the main body of the coil spring 6 in that state, so that the function of holding the plug B is not impaired. In addition, when the inserted plug B is pulled out, it immediately returns to its original state due to the elasticity of the metal wire, so it can be used almost semi-permanently, and simply by winding the springy metal wire into a coil. Good and easy to manufacture.

[Brief explanation of drawings]

Fig. 1 is a partially cutaway side view of an adapter plug that can implement the present invention, Fig. 2 is a longitudinal sectional side view of the main parts of the same, Fig. 3 is a longitudinal sectional side view of the main parts of another embodiment, and Fig. 4 is a longitudinal sectional side view of the main parts of the same embodiment. The figure is a longitudinal sectional side view of the main part of a different embodiment, FIG. 5 is a longitudinal sectional rear view of the same main part, FIG. 6 is a longitudinal sectional side view of the main part of a still different embodiment, and FIG. 7 is another embodiment. FIG. 8 is a longitudinal sectional side view of the essential parts of the same. Explanation of drawing symbols, A...Adapter plug, a
... Jack part, B ... Plug, b.
...Plug part, 1 ... Socket fitting, 1a.
...Inner end side, 10...Plug insertion hole, W...Coil spring housing part, 2.2a, 2b
...Outer cylinder sleeve, 3...Insulating material, 3
0... Rear end surface, 4, 5... Connection terminal piece, 4a... Intermediate sleeve, 5a... Chip, 6... Coil spring , 6a... Small diameter part, 6b... Large diameter part, 1... Step.

Claims (1)

[Scope of utility model registration request] A cylindrical coil spring accommodating portion W having an inner diameter larger than that of the plug insertion hole 10 is provided immediately inside the plug insertion hole 10 provided in the socket fitting 1 of the jack, and a spring-like coil spring accommodating portion W is provided inside the coil spring accommodating portion W. A coil spring 6 formed by spirally winding a certain metal wire material with an inner diameter larger than the plug insertion hole 10 and an outer diameter corresponding to the inner diameter of the coil spring accommodating portion W is fitted, and a part of the coil spring 6 is fitted with the coil spring 6 . Plug insertion hole 10
A plug in a jack for a light electrical appliance is characterized in that a small diameter portion 6a, which is slightly larger in diameter than the outer sleeve 2b of a plug B to be inserted into the socket, is eccentrically formed with respect to the axis of the plug insertion hole 10. Removal stop device.