JP2553567B2 - antenna - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an antenna which can be used particularly for receiving television waves.

2. Description of the Related Art A typical example of a conventional antenna of this type is
There is something like that shown in the figure. This will be described below with reference to FIG. In the figure, 31 is a main body axis, 32a, 32b, 32c, 32d, 32e are antenna elements constituting a waveguide section, 33a, 33b, 33c, 33d, 33e
Is a fixture for fixing the waveguide antenna elements 32a to 32e to the main body shaft 31, and fixes the waveguide antenna elements 32a to 32e to the main body shaft 31 together with the butterfly bolts 34a, 34b, 34c, 34d and 34e. It is a thing. Reference numeral 35 denotes a radiator, and 36 denotes a power feeding portion to which the radiator 35 is fixed, which is also fixed to the main body shaft 31 by a butterfly bolt 34f. Reference numeral 37 is a reflection antenna element that constitutes a reflection portion, and is fixed to the main body shaft 31 by a fixture 33f and a butterfly bolt 34g, like the above-mentioned waveguide antenna elements 32a to 32e.

At the time of packing the antenna having such a configuration, the antenna elements 32a to 32e, 37 and the radiator 35 are rotated to be substantially parallel to the main body shaft 31, and the butterfly bolts 34a to 34g are lightly tightened, and a packing case (not shown) is shown. Or the antenna elements 32a to 32e, 37 and the radiator 35 are removed from the main body shaft 31 and housed together in a packing case. Therefore, at the time of assembling the antenna, the butterfly bolts 34a to 34g are loosened to bring the antenna elements 32a to 32e, 37 and the radiator 35 into the normal state, that is, the state in which they intersect perpendicularly to the main body axis 31, and then the butterfly bolts are again provided. Either one of the antenna elements is fixed by tightening the screws 34a to 34g or by using the fixtures 33a to 33f and the wing bolts 34a to 34g from the beginning.

Problems to be Solved by the Invention However, the above-mentioned conventional antenna has a problem that a fixing tool and a wing bolt are required for each antenna element, the number of parts is large, and it takes a long time to assemble from a disassembled state, Further, there is a problem that the packing size becomes large in a case where the antenna elements are packed in a state of being substantially parallel to the main body axis.

The present invention has been made in view of the above problems, and an object of the present invention is to provide an antenna which has a small number of parts, can be assembled in a relatively short time, and can be reduced in size even when it is packed.

Means for Solving the Problems An antenna according to the present invention includes a first antenna body having a female-threaded hole in a part of an antenna support portion to which a reflecting antenna element is fixed, and a support for the first antenna body. A second antenna body having a male-threaded support rod threadably coupled to the female thread of the portion, and at least one female-threaded hole in the support portion integrated with the supporting rod; A third antenna body having a male threaded support rod screwed into and coupled with a female thread of a supporting portion of the antenna body at a power feeding portion, and fixing a reflection antenna element to this power feeding portion and providing a female thread. And a fourth antenna body having at least a male-threaded support rod threadedly coupled to the female thread of the third antenna body and a waveguide antenna element.

Effect According to the antenna of the present invention, since the first to fourth antenna bodies can be disassembled from each other and packaged at the time of packaging, the packaging size can be small, and the second to fourth antenna bodies can be assembled. Since the support rods are screwed into the holes of the first to third antenna bodies respectively, the number of parts is smaller than that of the conventional means using a wing bolt, and the assembly can be performed in a relatively short time. It can be done.

Embodiment An embodiment of the present invention will be described below with reference to FIGS.

In the figure, reference numeral 1 denotes a spherical support portion to which a radiation antenna element 2 is fixed, and a hole 3 is provided therein. Numerals 4 and 5 are also spherical supporting portions to which the radiating antenna element 2 is fixed, and one spherical supporting portion 4 integrally has a cylindrical supporting rod 6. The other spherical support 5
Has a columnar support rod 7 integrally with the support rod 7
Has a hole 8 at the other end on the same straight line. Reference numeral 9 denotes a spherical support portion integrally having a support rod 10, and the hole 1 is formed on the other end of the support rod 10 on the same straight line and on a line perpendicular to the straight line.
Having 1,12,13. 14 is a power feeding part, which is a radiation antenna element 1
5 is detachably fixed and has a support rod 16 and a hole 17, respectively. 18, 19 are the antenna elements for waveguide 20,
It is a spherical support portion to which 21 is fixed, and both have support rods 22 and 23 and holes 24 and 25, respectively. Reference numeral 26 is a decorative ball, which integrally has a support rod 27 that enters the hole 25 of the spherical support portion 19. here,
Each of the support rods 6, 7, 10, 16, 22, 23, 27 has a columnar shape, and as shown in FIG. 3, both have male screw portions 6a, 10a10 at their tips.
a, 16a, 22a, 23a, 27a are cut, and each hole 3,8,11,12,1
Female threads 3a, 8a, 11a, 12a, 13a, 17a, 24a, 25 on 3, 17, 24, 25
cutting a.

Therefore, when assembling the antenna element,
The male screw portion 10a of 10 is used as the female screw portion 3a of the spherical support portion 1, the male screw portion 6a of the support rod 6 is used as the female screw portion 12a of the spherical support portion 9, and the male screw portion 7a of the support rod 7 is also used as the female screw portion of the spherical support portion 9. 13
a, the male screw portion 16a of the support rod 16 is the female screw portion of the spherical support portion 9.
11a, the male screw portion 22a of the support rod 22 is connected to the female screw portion 17 of the power feeding portion 14.
a, the male screw portion 23a of the support rod 23 is attached to the female screw portion of the spherical support portion 18.
The male screw portion 27a of the support rod 27 of the decorative ball 16 is attached to the spherical support portion 24a.
This can be completed by screwing the female threaded portions 25a of 19 together.

The spherical support portion 1, the reflection antenna element 2, the hole 3, and the female screw 3a form a first antenna body, and the spherical support portion 9, the support rod 10, the hole 11, the female screw 11a, and the like form a second antenna body, and the feeding portion. 14, radiation antenna element 15, support rod 16, hole 1
7, the 3rd antenna body by the female screw 17a, spherical support
18, 19, support rods 22, 23, waveguide antenna elements 20, 21, hole 2
The fourth antenna body is constituted by 4, 25 and female screws 24a, 25a, respectively.

At this time, “1”, “2”, “3” ... to the spherical support parts 1, 4, 5 and 9, the power feeding part 14, the spherical support parts 18 and 19, and the decorative balls 26 in sequence.
If the numbers are marked, the antenna elements can be easily assembled without mistake. At this time, the wing bolt and the fixing tool which have been required in the past are not necessary, so the number of parts can be reduced and the cost can be reduced. In addition, since they can be packed separately, they can be made compact in size.

In FIG. 2, reference numeral 28 denotes an antenna supporting leg, and a male rod is formed at the tip of a supporting rod portion 29 at the upper end of the antenna supporting leg so that it can be screwed into the female screw portion 8a of the hole 8 of the male screw spherical supporting portion 5. I have to.

As described above, according to the present invention, the second antenna body,
An antenna is formed by screwing each of the antenna bodies by screwing a male screw on each of the support rods of the third antenna body and the fourth antenna body and cutting a female screw on the supporting portion of the first to third antenna bodies. Can be completed and can be easily assembled, and the number of parts can be reduced because the wing bolts and fixtures required in the past are not required, and the cost can be reduced and the management can be facilitated. Furthermore, since each antenna body can be separately packaged during packaging, the packaging case can be made compact.

[Brief description of drawings]

FIG. 1 is an exploded perspective view of an antenna in one embodiment of the present invention, FIG. 2 is a perspective view of the antenna, FIGS. 3 and 4 are cross-sectional views of a main part, and FIG. 5 is a plan view of a conventional antenna. It is a figure. 1,9,18,19 …… Spherical support, 2 …… Reflecting antenna element, 3,11,17,24,25 …… Hole, 3a, 11a, 17a, 24a, 25a …… Female thread, 10,16 , 22,23 …… Support rod, 10a, 16a, 22a, 23a …… Male screw, 14 …… Feeding part, 15 …… Radiation antenna element, 20,2
1 ... Waveguide antenna element.

Claims (4)

(57) [Claims] 1. A first antenna body having at least a female-threaded hole in a part of an antenna support portion to which a reflecting antenna element is fixed, and the first antenna body being screwed into the female thread of the support portion of the first antenna body. A male threaded support rod to be coupled and a second antenna body having at least one female threaded hole in the support portion integrated with the support rod, and a female thread of the support portion of the second antenna body. A third antenna body having a supporting rod, which is screwed and coupled and having a male thread cut, in which the antenna element for radiation is fixed to the feeding portion, and a female screw is provided, and the third antenna body. An antenna comprising a fourth antenna body having at least a male-threaded support rod threadedly coupled to the female thread and a waveguide antenna element. 2. The support portion of the second antenna body has holes formed by cutting second and third female threads, and a support rod integral with the support portion to which the second and third reflecting antenna elements are fixed. The antenna according to claim 1, wherein the antenna can be screwed into each of these holes. 3. The fourth antenna body has a hole in which a female screw is cut in a support portion to which the waveguide antenna element is fixed, and a decorative ball can be screwed into this hole. Alternatively, the antenna according to item 2. 4. The antenna according to claim 2, wherein one of the support portions screwed to the second antenna body has a hole formed by cutting a female screw with which the tip of the antenna support leg is screwed.