JPH0619204Y2 - Rod antenna - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a rod antenna suitable as a receiving antenna for a radio cassette, a liquid crystal television, or the like.

[Conventional technology]

In the conventional rod antenna of this type, the parts of the rotating part are made of metal such as guide fittings and guide pipes, and therefore, a proper processing step is required.

This rod antenna has a retractable multi-stage rod antenna and a base metal fitting fixed to the base thereof, and has a mechanism capable of bending freely on the head and the support shaft on the base metal fitting side, and the lower part of the base metal fitting is press-fitted into the press-fitting metal fitting,
The entire part is enclosed in a guide fitting, and a rotational force is generated in this press-fitting part so that the bending and rotation can be performed.

[Problems to be solved by the invention]

In such a conventional rod antenna, the bending portion of the expandable multi-stage rod antenna uses metal cutting and is made up of various other components in combination, so there is no particular problem in terms of performance, but the cost is high. There was a drawback.

Further, since all of them are made of a combination of metals, there is a problem of wear particularly in a friction portion, and in order to eliminate these problems, application of grease or the like causes complexity of assembly and increase in man-hours. The problem remains.

This invention was made in order to eliminate the above-mentioned conventional drawbacks, aiming at overall weight reduction and cost reduction, as well as being able to provide multiple colors and providing a sense of unity with the set, as well as rotational friction. An object of the present invention is to provide a rod antenna that can obtain a smooth rotational frictional force in a part.

[Means for solving problems]

In order to achieve such an object, the rod antenna of the present invention comprises a base member having a tongue-shaped lower portion formed on the base of an expandable multi-stage rod antenna element, and the base member is pivotally mounted on the upper portion so as to be bendable. The lower part of the metal fitting is reduced in diameter to form a groove on the outer peripheral surface around the axis, and the holder in which the reduced diameter lower part of this metal fitting is fitted to generate the rotational friction torque is formed of a conductive resin. A mounting part for mounting to the set is integrally formed on this holder, and a screw mounting hole is provided at a position corresponding to the concave groove of the base metal fitting fitted in the mounting part, and the screw is mounted on this screw. The holder is fixed to the set by penetrating through the hole and screwed into the set to prevent the stand fitting from coming off the holder.

[Action]

Since the reduced diameter lower part of the metal fitting is fitted into the holder made of a conductive resin to generate a rotational friction torque, there is no seizure or the like due to the combination of metal members unlike the conventional structure of this type. Further, by inserting the screw into the screw mounting hole and screwing the screw into the set, the holder is fixed to the set and the base metal fitting is prevented from coming off from the holder. In addition, the rod antenna element is electrically fed to the set via the holder.

〔Example〕

An embodiment of the rod antenna of the present invention will be described below with reference to the drawings.

FIG. 1 (a) is a front view showing the entire structure of the embodiment, and the holder is half-cut. In FIG. 1 (a), 1 is a decorative ball. This ornamental ball 1 is screwed onto the tip of a telescopic multistage rod antenna element 2.

The base portion of the expandable multi-stage rod antenna element 2 has the maximum diameter, and the diameter is gradually reduced toward the tip, that is, in the direction of the decorative ball 1, and the expandable and retractable rod antenna element 2 is retractably housed. The base portion of the expandable multi-stage rod antenna element 2 is formed integrally with the base metal fitting 3.

The lower portion of the base metal fitting 3 is formed in a tongue shape. The tongue-shaped base metal fitting 3 is adapted to be inserted into the slit 6a of the base metal fitting 6.

The bracket 6 is shown in detail in FIG. This FIG. 2 is shown as a front view of the base metal fitting 6, and as is clear from FIG. 2, a slot 6a is formed at the center of the tip of the metal base metal fitting 6.

The lower portion (right side in FIG. 2) of the base metal fitting 6 is reduced in diameter, and a taper portion 6b and a concave groove 6c are formed on the outer peripheral surface thereof around the axis at predetermined intervals in the axial direction.

The tongue-shaped base metal fitting 3 is inserted into the slot 6a of the base metal fitting 6, and a pan head machine screw 5 is screwed through a flat washer 4 in the slot 6a. That is,
The base metal fitting 3 is pivotally attached to the pan head screw 5, whereby the expandable multi-stage rod antenna element 2 is bendable with respect to the base metal fitting 6.

The lower part of the base metal fitting 6, that is, the tapered portion 6b and the concave groove 6c are fitted into the holder 8. As is clear from FIG. 1 (b) (side view of FIG. 1 (a)), this holder 8 is formed in a cylindrical shape, but the mounting portion 8a to the set is parallel to the axis. It is formed so as to extend integrally.

A screw mounting hole 8b is formed in the mounting portion 8a at a position corresponding to the concave groove 6c of the base metal fitting 6. The screw 9 is adapted to be inserted into the screw mounting hole 8b. By inserting the screw 9 into the screw mounting hole 8b and screwing the protruding tip screw into the set, the holder 8 is fixed to the set, and at the same time, the side surface of the screw 9 is inserted into the groove 6c of the base metal fitting 6. It is designed to engage. This prevents the base metal fitting 6 from coming off the holder 8.

With this configuration, the bracket 6 is fitted into the holder 8 to generate a rotational friction torque, and as described above, the expansion / contraction multi-stage rod antenna element 2 is refracted. The base metal fitting 3 is bendable with respect to the base metal fitting 6.

Further, since the holder 8 is made of a conductive resin, the conductivity of the expandable multi-stage rod antenna element 2 can be conducted to the set side through the base metal 3, the base metal 6, and the holder 8, and Since the holder 8 is made of a conductive resin, it can be matched with the color of the set side, and a sense of unity with the set can be obtained.

[Effect of device]

As described above, according to the rod antenna of the present invention, the holder is made of the conductive resin, and the holder is prevented from coming off from the holder at the same time when the holder is attached to the set side. The rotating part, which has the largest proportion, can be made of a resin molded product, and can also be made of a single conductive resin, and the number of component parts is small, which not only enables cost reduction, but also facilitates assembly and is suitable for mass production. is there.

In addition, the holder can be matched with the color of the set to give a sense of unity with the set, and since the holder is a conductive resin, its shape can be arbitrarily set, and a design suitable for the set can be obtained.

Furthermore, since the holder is made of a conductive resin, the rotation operation is smooth, and since it does not hit each other metal, problems such as burring due to baking and rubbing do not occur,
It has a smooth rotation, and the life is 5 according to the test.
It clears lightly 000 times, making it an ideal move.

[Brief description of drawings]

FIG. 1 (a) is a front view obtained by half-cutting a holder showing the configuration of an embodiment of the rod antenna of the present invention, FIG. 1 (b) is a side view of FIG. 1 (a), and FIG. It is a front view of the stand metal fittings in an example. 2 ... Telescopic multi-stage rod antenna element 3 ... Base metal fitting, 6 ... Stand metal fitting 6c ... Recessed groove, 8 ... Holder 8a ... Mounting part, 8b ... Screw mounting hole 9 ... Screw

Claims (1)

[Scope of utility model registration request] 1. A base metal fitting having a tongue-shaped lower portion is formed on a base portion of an expandable multi-stage rod antenna element, and the base metal fitting is pivotally attached at an upper portion to reduce a diameter of a lower portion of the base metal fitting. A groove is formed on the outer peripheral surface around the axis, and the reduced diameter part of this metal fitting is inserted to form a holder that generates rotational friction torque with a conductive resin. Part is integrally formed, and a screw mounting hole is provided at a position corresponding to the recessed groove of the base fitting fitted in the mounting part, and the screw is passed through the screw mounting hole and screwed into the set. A rod antenna, wherein the rod antenna is configured so that the holder is fixed to the set and the stand fitting is prevented from coming off the holder.