JPS6025132Y2 - Rod antenna device - Google Patents

Description

[Detailed explanation of the idea] [Industrial application field]

The present invention relates to a telescoping rod antenna device used in radios, televisions, transceivers, etc.

[Conventional technology]

A conventional rod antenna is configured to expand and contract by connecting a plurality of antenna elements whose diameters are successively changed in multiple stages.

[Problems that the invention attempts to solve]

Since such conventional rod antennas are formed from a single element, there is a limit to the transmitting and receiving performance of the antenna.

[Means to solve the problem]

The present invention was developed in view of these circumstances, and by adding a parabolic element to the tip of the rod antenna that can be opened and closed, the effective length of the antenna is extended, the directivity of incoming radio waves is improved, and furthermore, An object of the present invention is to provide an improved rod antenna device that improves the transmitting and receiving performance of the antenna by concentrating received radio waves on the antenna, and improves the ease of handling.

【Example】

Hereinafter, one embodiment of the present invention will be specifically described with reference to the drawings. In the figure, reference numeral 1 denotes a rod antenna, and a base metal fitting 2 is attached to the tip of the antenna element 1 at the final stage. It is provided to maintain the same state. The base metal fitting 3 is provided with a parabolic element 5 made of, for example, four wire rods arranged in a cross shape, and a tip bar 8 having a jewel 7 is attached to the center of the parabolic element 5 through a locking washer 6. By screwing the end bar 8, the parabolic element 5 is also fixed together. The parabolic element 5 has elasticity due to heat treatment, and when there is no load, it curves like an umbrella and is in an open state, and when a load is applied from the outside, it easily bends inward, and it stretches linearly and becomes a closed state. Become. Further, the tip of the parabolic element 5 is bent into a small circular shape, and in the above-mentioned closed state, the bent portion 5 comes into contact with the lower surface of the ornament 7 and acts like a stopper. Furthermore, in the region where the final stage antenna element 1' expands and contracts,
A cylindrical body 9 is mounted with its lower end connected to the antenna element 1'' of the stage before the final stage, and the base metal fitting 2 is slidable and rotatable inside this cylindrical body 9 via a slide spring 10. A diaphragm 9' is formed at the tip of the cylindrical body 9, and the slide spring 10 or the bent portion 5' of the parabolic element 5 is engaged with this diaphragm 9' to act as a stopper. Thus, since the present invention is constructed as described above,
As shown in FIG. 1, when the ornament 7 is pushed in and the antenna element 1' etc. is reduced, the parabolic element 5 is restrained by the cylinder 9, bends inward, and extends linearly to close the cylinder 9. stored inside. Then, when almost all of the parabolic element 5 is stored, the bent part 5' at the tip is in contact with the lower surface of the ornament 7, and the aperture 9' of the cylindrical body 9 is caught, preventing it from entering any further. In this way, in the end, only a small part of the tip of the ornament 7 and the parabolic element 5 remains outside the cylinder 9. Next, when the antenna is used, when the ornament 7 is pinched and the tip bar 8 is pulled out, the parabolic element 5 is also pulled out and the antenna element 1' etc. are raised. As shown in FIG. 2, when the parabolic element 5 completely comes out of the cylindrical body 9 and the restriction is released, the parabolic element 5 automatically opens into an umbrella shape due to its elasticity, and the slide spring 10 hits the orifice 9' of the cylindrical body 9 and is stopped from being removed. Therefore, in this state, the parabolic element 5 is rotated horizontally (left and right) as shown by arrow A in Figure 3, and tilted up and down (back and forth) as shown by arrow B to set it in a predetermined direction and perform transmission and reception. be. Note that the parabolic elements 5 are made of a conductive material such as metal, and the number of parabolic elements 5 is limited to four in the embodiment. It's not a thing. Further, a conductive cloth (ordinary cloth coated with conductive paint may be used), a synthetic resin sheet, or a conductive film may be placed between each element. In this case, if you use a thin conductive rubber sheet with strong elasticity for the sheet, it will be easier to store because the surplus part will not come out when it is stored, and if it becomes difficult to open due to the storage capacity of the sheet, you can It is only necessary to attach a device to keep it open. Furthermore, considering the usage situation, it is convenient for the parabolic element 5 to be housed in the cylinder body 9 at the top end, but in this case, the tip bar 8 may be expanded and retracted not only in one stage but also in two stages. good.

[Effect of the idea]

In this way, according to the present invention, the function of a parabolic antenna is added to the tip of the rod antenna 1 by the parabolic element 5 made of an elastic wire and rotatable back and forth and left and right, so of course the effective length of the antenna is increased. The directivity and concentration of incoming radio waves are significantly improved. Furthermore, when not in use, the parabolic element 5 is stored inside the cylindrical body 9 and there is no protruding object, so it is convenient for carrying around and there is no wobbling. Furthermore, since a tip bar having a decorative bead is provided protruding from the center of the parabolic element, opening and closing of the parabolic element is easy and the operability is good.

[Brief explanation of drawings]

Fig. 1 is a partially sectional side view showing a stored state of an embodiment of the rod antenna device according to the present invention, Fig. 2 is a sectional view showing the same in a pulled out state, and Fig. 3 is a perspective view showing the same in a used state. It is a diagram. 1...Rod antenna, 1', 1"...
・Antenna element, 2...Base metal fitting, 3...
・Base metal fitting, 4... Joint means, 5...
Parabolic element, 5'...bending part, 6...
・・・Washer, 7... Decorative beads, Death...
Tip bar, 9...tube, 9'...diaphragm, 10...slide spring.

Claims (1)

[Scope of utility model registration request] A parabolic element made of a plurality of elastic wires and curved into a predetermined shape is provided at the tip of the final stage antenna element of the multi-stage rod antenna so as to open and close in an umbrella shape via a base metal fitting, and a center part of the parabolic element is provided. a tip bar having a decorative bead protrudes from the top, a cylindrical body is disposed in a region where the final stage antenna element expands and contracts, and when the antenna element is contracted, the parabolic element is closed and housed in the cylindrical body; A rod antenna device characterized in that when extended, the parabolic element is taken out from the cylindrical body and automatically opened by its elastic force, and is tiltable back and forth and left and right around the base metal fitting.