JPS62105502A - Extension antenna mechanism - Google Patents

Abstract

PURPOSE:To obtain excellent transmission and reception antenna performance by inserting a coiled antenna element made of a thin wire which has substantially no resistance into different-diameter tubes between the uppermost and lowermost stages. CONSTITUTION:The different-diameter materials 1, 2, and 3 are extensible like a telescope, both ends of the coiled antenna element 6 are fixed to the uppermost stage tube material 1 and the lowermost stage tube material 3, and the element 6 is provided having substantially no resistance to extending operation. A decorative bead 9 is fitted to the upper end of the tube material 1 and lock parts 2b and 3b which are bent inward are formed at the upper ends of the tube materials 2 and 3; and lock holes 1c and 2c are provided on the lower- end sides of the tube materials 1 and 2 except the lowermost stage tube 3 and a joint piece 4 made of synthetic resin is fitted to the lower-end part. This joint piece 4 has the projection part 4c fitted in the hole 1c or 2c. Then, the joint piece 4 and tube material 1 or 2 are inhibited from rotating.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a telescoping antenna mechanism, and an object of the present invention is to facilitate the molding and manufacturing of the telescoping antenna mechanism, and to obtain favorable transmission and reception performance with a lightweight and relatively short antenna.

Industrial applications Telescoping antenna mechanism.

Conventional technology Extendable antennas (Rondo antennas) used in mobile communication equipment such as radios, televisions, and radios have been known for a long time, and their basic configuration consists of multiple antenna elements. The metal tubes of different diameters are assembled to be expandable and retractable, ensuring complete electrical continuity between the metal tubes of different diameters and locking between the metal tubes of different diameters when extending and retracting. For this purpose, a metal elastic locking piece is interposed between each tube body.

In addition, as an application of this basic structural relationship, as in Japanese Utility Model Publication No. 44-20097, a coiled conductor is embedded in an insulating material such as glass wool, and a plurality of tubes with different diameters are used. The assembly of the book so that it can be expanded and contracted is comparable, or the pop-up antenna that is made to protrude from the radio using a coil spring as in Japanese Utility Model Publication No. 54-19804, and the antenna as in Japanese Utility Model Publication No. 55-8964. It is known that the container tubes constituting the container are engaged in a spiral manner to expand and contract. In addition, British Patent Publication No. 47-27740 proposes that a coiled bullet with the upper and lower ends insulated is fixed inside the Rondo antenna having the general configuration described above, and an insulated wire is fixed so that it can be energized both inside and outside. There are n.

Problems to be Solved by the Invention In the general antenna element described above, a metal tube is used as an antenna element, and a considerable number of man-hours are required to process the antenna element and to process and assemble the interposed elastic metal pieces. Especially generous aI! Same as above, cost amplifier cannot be avoided because i41L requires sufficient attention.

Chrome plating is indispensable for corrosion-resistant purposes, which also increases costs, and since only one color can be obtained, it often lacks harmony with the transmitting/receiving equipment or car body, etc. to which it is applied, impairing its aesthetic appearance.

Furthermore, conventional spinning machines that have been proposed with some ingenuity over this general type have basically not been able to effectively solve the above-mentioned disadvantages, and are prone to breakage accidents. However, due to the structural separation, for example, it is easy to extend, but it is rarely easy to retract, resulting in a lack of operability, and it is not possible to achieve a low cost and desirable performance.

``Structure of the Invention'' Problem t - Means for solving the problem A plurality of pipes of different diameters are assembled in a telescopic manner so as to be expandable and retractable - each formed as a molded body of an insulating material such as synthetic resin, A coiled antenna element made of 111B wire, which does not exhibit substantial resistance to the above-mentioned telescopic expansion and contraction operation, is inserted between the uppermost tube material and the lowermost tube material in the different diameter tube materials, and both ends are connected to each other. A synthetic resin joint piece formed at the upper end of the outer pipe member and connected to the upper part of the ninth section is attached to the outer periphery of the lower end of the inner pipe member in the series of different diameter pipe members described above, and the sweet acid resin joint piece and the above-mentioned different diameter pipe members are fixed. A telescoping antenna mechanism in which a means for preventing rotation in the circumferential direction is provided between the radial pipe material and the diameter of the antenna.

By forming the pipe material with different diameters from an insulating material such as a synthetic resin material, it is not only possible to reduce the weight sufficiently, but also to make it possible to adopt any color, making it suitable for receiving equipment or stand-alone units. Obtain an antenna with a variety of aesthetic features that match.

Since the different diameter tube covers and protects the coiled metal wire surrounding the antenna element, a thin wire is sufficient for the antenna element.

That is, since elastic force is not required, a thin wire that does not present any practical resistance to the stretching operation between tubes of different diameters is sufficient, and the stretching operation is smooth.

Although the antenna element is a single member, it is attached to the uppermost pipe material and the lowermost pipe material, so that the extension of the different diameter pipe materials,
A reception relationship is formed by expansion and contraction similar to that in which a metal tube is expanded and contracted as an antenna element by contraction.In particular, a coiled configuration allows the wavelength of a given wave to be properly transmitted from a bruise with an element configuration shorter than that of a metal tube. Transmit and receive data, and shorten the antenna.

The joining piece made of acid resin that defines the extrusion limit of the antenna can be mass-produced, and it is also possible to prevent rotation in the circumferential direction between this synthetic resin follower piece and the pipe material of different diameters. Regardless of the extension/retraction operations of the different diameter tube material and the coiled antenna element, these members always maintain a constant relationship, so the transmission and reception characteristics of the nfL coiled antenna element are always the best as they are assembled to obtain the highest gain. Maintain N1 transmitter and receiver function at seven altitudes and maintain properly.

-8- Both the different-diameter tube material and the coiled antenna element made of bottom resin have favorable flexibility, avoid breakage accidents, etc., and are particularly corrosion resistant, do not require plating, and can be installed separately. And it can be obtained in sufficient quantity.

Examples The following specific embodiments of the present invention are described above.
To explain what is shown in the attached drawings, it is a mechanical system that uses a plurality of pipe materials 1, 2, 3... of different diameters, which can be mutually expanded and contracted in a telescopic manner, and which can be frosted slowly so that they do not come out. The structural relationship itself is the same as that of conventionally known general telescopic antennas, but in the present invention, such different diameter tube materials 1.2.3 are not used as antenna elements, and therefore generally -8- It is essentially different in that it is a molded resin material, and a coiled antenna cord 6t- is used separately, and this coiled antenna element 6 is made of the above-mentioned series of different diameter tube materials 1.2.3.・・・・・・
Although both ends are completely fixed to the uppermost pipe material 1 and the lowermost pipe material 3 in , the different diameter pipe materials 1.
2.3 has a large material that offers virtually no resistance to telescopic telescoping operations.

The decorative bead 9 is attached to the upper end of the above-mentioned upper order pipe material 1, but the upper ends of the other different diameter pipe materials 2, 3... are bent inward to form the locking portions 2b, 3b' and 6-shaped bottoms. Also, the lowest pipe 3
Lower end detection for pipe materials 1.2 other than engagement holes 1c and 2c
A bonding piece 4f made of acid resin as shown in FIG. 5 is attached to the lower end. This installation is done in part 1.2.
and 4 are both made of 8-bottom resin, so it goes without saying that means such as a melting layer may be used, but in the illustrated example, the connecting piece 4 has protrusions that engage with the engaging holes IC and 2C. 4Ct- is formed, and the protrusion ◆C is inserted into the engagement hole 1C or 2.
By fitting CVc, coupling can be easily performed.

The above-mentioned retaining piece 4 is generally manufactured as a plate-like body by curving only the both sides as shown in FIG. When attached to the lower end of a tube material 1.2 in a rolled layered manner as shown in FIG. 4, it exhibits a preferable elastic action and effectively achieves expansion and contraction due to sliding between the tube materials of different diameters.

As shown in Fig. 4, the joint piece 4 is attached to the t-IQ pipe material 1, and the pipe material 2 as shown in Fig. fA6 is attached to the outside thereof as an outer pipe material. 3
An engagement strip 2a or 3a is formed along the axial direction on the inner surface of the joint piece 4, and the engagement strip 2a or 3a is fitted into the gap 5 formed between the both side edges 4a14a of the joint piece 4 described above. . That is, by fitting the engagement strips 3a in this way, the different diameter tube members 1, 2, 3, etc. do not rotate in the circumferential direction regardless of their expansion and contraction operations, and therefore, the coiled antenna element 6 always maintain a certain relationship. That is, such an antenna element is generally designed to obtain the best reception relationship, but as in the present invention, the antenna element is designed to obtain the best reception relationship.
．． 2.3... In the case where the coiled antenna element 6 is made of a thin wire that exhibits no substantial resistance to the expansion and contraction operations, the different diameters of the tube material 1.2.3... are expanded and contracted. Tube material 1.2.3... Since rotation occurs between each other, torsion is added to the coiled antenna element 6, causing a diameter contraction or expansion phenomenon due to the coil, and the electrical constant (inductance) of the antenna and capacitance) change, causing fluctuations (deterioration) in the designed reception performance.

By preventing rotation in the circumferential direction as described above, no twisting force is generated on the antenna element 6, and the receiving relationship as designed can always be maintained.

To prevent rotation in the circumferential direction between the different diameter tubes 1, 2, 3, etc. as described above, polygonal tubes may be used depending on the case, and by using all 4 of the 4 LK quick-response joint pieces. It can be implemented without the engagement strip 2a or 3a, both ends, and the gap between the edges 4a and 4a.

That is, as shown in Fig. 8, there are 6 polygonal pipes 1.2
．． 3... and the joint piece 4 made of ceric acid and fat are separated from each other by their corners, and their fitting structure prevents rotation in the circumferential direction between them. In addition, the joining piece 4 is divided and the engaging strip 2a or 3
It is also possible to have multiple pieces of a. Furthermore, as shown in FIG. 9, the vibrator may have a heart-shaped, pincushion-shaped, star-shaped, or cross-sectional shape in cross section.

The upper end of the coiled antenna element 6 is connected to the decorative ball 9.
It is fixed to the upper end of the uppermost tube member 1 using the insertion M, but such fixing can be carried out by any other suitable method.

The lower end of the coiled antenna element 6 is connected to a conductive holder 70 attached to the lower end of the lowermost tube member 3 as shown in FIG. 1.2.
By inserting it into the stepped protrusion 71 and fixing it with the ring member 8, it is electrically connected, that is, it is connected to a transmitting/receiving device (not shown) via the holder 7.

Of course, such a fixed connection means that the coiled antenna element 6 of the present invention does not exhibit substantial resistance to the expansion and contraction of the tube materials 1.2.3, and is also free from twisting due to rotation due to the expansion and contraction of the tube materials 1.2.3. Since it is not subject to force, it is sufficient to use something like soldering.

As mentioned above, the coiled antenna element 6, which is an i-line that does not exhibit substantial resistance to the expansion and contraction of the tubes 1.2.3, can be used even with the income of all the tubes 1.2.3. It does not have a spring force that exerts a thinning effect even when extruded or when the entire tube is stretched, and specifically, it is a thin metal wire having conductivity and having a diameter of Q, 3 mg or less.

Even if the container has some elasticity, it will not overcome the frictional resistance caused by the aforementioned container joining piece 4 and the like. Such a coiled antenna element 6 has a considerably shorter element length than a metal tube rond antenna, as the element length is shortened by making the necessary antenna wire length into a coil shape, and the receiving performance is equivalent to that of the metal tube rond antenna. obtained n1 i.e. experimentally 5
A length of about 0 to 60% is sufficient.

The antenna of the present invention, in which the different diameter tube materials 1, 2, 3... are clearly similar to synthetic resin pipes, has a color and various patterns that effectively harmonize with the color of the transmitting/receiving equipment or car body to which it is applied. In addition, there is no peeling of the plating, and it is extremely light and dangerous in terms of weight, resulting in an aesthetic appearance that is completely different from that of conventional antennas of this type.

Effects of the Invention According to the present invention as explained above, it is possible to provide a product that greatly changes the image of the conventional oak telescopic antenna, and matches the design and color of the equipment or car body to which it is applied. Furthermore, antennas that are significantly different in terms of flexibility and light weight can be obtained.Moreover, the tube materials of different diameters and the joint pieces are both accurately manufactured by mass production, and the antenna element is integrated. There is no special need for precision in the different-diameter pipe material and the joining piece, which are simply protective materials, and assembly is simple, so costs can be sufficiently reduced and rotation can be prevented during expansion and contraction operations. This has the effect of preventing changes in electrical constants and providing stable and highly efficient operation as an antenna, making this invention a highly effective invention industrially.

[Brief explanation of drawings]

The drawings show an example of an embodiment of the present invention, and include w
Figure c1 is a sectional view showing the extended state of the antenna mechanism according to the present invention, Figure 2 is a vertical 1tITlfr diagram of its contracted state,
Figure 3 is a cross-sectional view of the same, Figure 4 is a slope view of the top pipe material, Figure 5 is a slope view of the synthetic resin basin piece, and Figure 6 is a slope view of the lower end of the outer U material. 7 is a perspective view showing the manufacturing state of a synthetic resin joint piece, FIG. 8 is a partial perspective view of another embodiment of the present invention, and FIG.
The figures are sectional views showing some alternative examples of other pipe materials with different diameters. However, in these drawings, 1.2.3 indicates pipe materials with different diameters,
4 is a connecting piece made of acid resin, 5 is a gap, 6 is a coiled antenna element, 7 is a conductive holder, 8 is a ring material, 9 is a decorative bead, 2a and 3a are engagement strips It is. Patent applicant Nippon Antenna Co., Ltd. Inventor Yudai Takizawa
<-FjM No. ,,5'' Country No. 71!1 No.
A area U

Claims (1)

[Scope of Claims] 1. A plurality of pipe members of different diameters assembled in a telescopic manner so as to be expandable and retractable are each formed as a molded body of an insulating material such as a synthetic resin, and the uppermost pipe member and the uppermost pipe member in the series of pipe members of different diameters are formed. A coiled antenna element made of a thin wire that does not exhibit substantial resistance to the above-mentioned telescopic expansion and contraction operation is inserted between the lower pipe material and both ends thereof are fixed respectively. A synthetic resin joint piece is attached to the outer periphery of the lower end of the inner pipe material to be joined to the locking part formed at the upper end of the outer pipe material, and a circumferential direction is provided between the synthetic resin joint piece and the above-mentioned different diameter pipe material. A telescoping antenna mechanism characterized by being provided with rotation prevention means. 2. The synthetic resin joint piece is formed into a polygonal shape, and each pipe material of different diameters has a polygonal shape that corresponds to the synthetic resin joint piece, and the fitting between the corners of the synthetic resin joint piece and the different diameter pipe material is achieved. The telescoping antenna mechanism according to claim 1, wherein the mating structure serves as a rotation prevention means. 3 Forming an engaging part with the inner pipe material on the inner surface of the synthetic resin joint piece, wrapping the synthetic resin joint piece around the lower end side of the inner pipe material, and wrapping the synthetic resin joint piece on both sides of the synthetic resin joint piece. The telescoping antenna according to claim 1, wherein the engagement portion formed along the axial direction on the inner surface of the outer tube material is fitted into the gap formed between the edges, thereby serving as a rotation prevention means. mechanism. 4. A conductive holder is provided at the lower end of the lowermost pipe, and the lower end of the coiled antenna element is connected to the conductive holder and is also connected to a transmitting/receiving device. Telescoping antenna mechanism.