JP2001284928A - Paraboloidal antenna for receiving satellite broadcast - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a paraboloidal antenna equipped with a converter supporting arm, that has excellent weather resistance and is easily assembled. SOLUTION: The converter support arm for attaching the converter with feed horn of the paraboloidal antenna is composed of a main body 20 of arm and a cover 10 and coaxial cables 31 and 32 for transmitting the output signals of the converter are passed between the main body 20 of arm and the cover 10. The main body 20 of the arm is formed so that both ends 21 in the breadthwise direction can face each other, and the cover 10 is made of elastic synthetic resins and provided with a lock pawl for locking both ends 21 in the breadthwise direction and a coaxial cable holder in a structure for elastically holding the coaxial cables.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a satellite broadcast receiving parabolic antenna, and more particularly to a satellite broadcast receiving parabolic antenna for passing a coaxial cable for transmitting an output signal of a converter inside a converter support arm.

[0002]

2. Description of the Related Art A parabolic antenna comprises a mount, a reflector, a converter support arm, and a converter with a feed horn attached to the converter support arm.

Conventionally, a coaxial cable for transmitting an output signal of a converter has been fixed outside a converter support arm by a holder or the like.

However, an external force is easily applied to the coaxial cable fixed by the holder, or the coaxial cable is fattered by wind or the like.
There have been problems such as the coaxial cable dropping out of the converter connector or the like, or the electric wire in the coaxial cable being disconnected.

As a device for solving this problem, Japanese Patent Application Laid-Open No.
No. 130114 discloses a technique in which a converter support arm is made substantially cylindrical, a cutout for passing a coaxial cable from a converter is provided below the converter support arm, and a coaxial cable is inserted inside.

However, a parabolic antenna having such a structure is exposed to wind and rain, and rain, snow, and the like enter into the converter support arm, or seawater blows up in the beach area, thereby covering the coaxial cable in the converter support arm. ,
There is a problem that the weather resistance is low to cause damage and deterioration.

In another solution, a coaxial cable for transmitting the output signal of the converter is passed through a converter support arm consisting of a pipe having a round or square cross section.
At the time of assembly, a coaxial cable is inserted from one opening of the converter support arm, the tip of the coaxial cable is pulled out from the other opening, and the F-type plug attached to the tip of the coaxial cable is connected to a feed horn. Connected to the F-type plug seat of the converter. Further, the end of the converter with the feed horn having the F-type plug seat is inserted into the other opening of the converter support arm, and is fastened with screws and nuts through holes provided on both sides. Fix it. As described above, in a structure in which the converter supporting arm is a pipe and a coaxial cable is passed through the pipe, there is a problem in that it takes time to mount the converter.

[0008]

SUMMARY OF THE INVENTION It is an object of the present invention to provide a parabolic antenna having a converter supporting arm which is excellent in weather resistance and easy to assemble.

[0009]

The parabolic antenna according to the present invention comprises a mount, a reflector, a converter support arm, and a converter with a feed horn attached to the converter support arm. The converter support arm includes an arm body and a cover, and passes a coaxial cable for transmitting an output signal of the converter between the arm body and the cover.

The arm body is formed so that both ends in the short direction face each other, the cover is made of synthetic resin having elasticity, a locking claw for locking both ends in the short direction, and a coaxial cable by elasticity. And a coaxial cable holder having a structure for holding the arm member, and the arm body and the cover are preferably assembled integrally with each other in an airtight manner.

Further, it is preferable that one end of the arm can be joined to the mount, and one end of the cover can be joined to the converter with the feed horn.

[0012]

1 to 5 show an embodiment of a parabolic antenna according to the present invention.

FIG. 2 is a perspective view of the assembled parabolic antenna. 1 is a sectional view taken along the line AA of FIG. 2, and FIG. 3 is a sectional view taken along the line BB of FIG. FIG. 4 is a perspective view of the arm body, and FIG. 5 is a perspective view of the cover.

The parabolic antenna of the present invention has a mount 3
, A reflecting mirror 2, a converter support arm 1, and a converter 4 with a feed horn attached to the converter support arm 1. The converter support arm 1
Consists of an arm body 20 and a cover 10.

The arm body 20 is, for example, a steel plate material, has a substantially C-shaped or U-shaped (groove) cross section, has an open surface, and has an outer shape punching die or the like so that both short-side ends 21 face each other. It is formed by the used sheet metal press working or the like, and is coated with a surface. Further, screw holes 25 may be provided at both ends.

The cover 10 is made of, for example, a synthetic resin, and is fitted to the opening of the arm body 20 so as to fit the opening of the arm body 20.
Locking claw that locks the short-side both ends 21 of this (with this locking,
The locking claws are in close contact with the short-side ends 21 and the sealing property (airtightness) is maintained. ) And a coaxial cable holder. Further, screw holes 15 may be provided at both ends. In the case shown, the locking claws extend over the entire length of the cover 10. When made of soft vinyl chloride as the material, the adhesiveness to the arm body 20 is good, and high weather resistance can be obtained. In addition, the coaxial cable can be easily held due to its good workability and surface properties, and can cope well with the size of the coaxial cable.

The method for manufacturing the cover 10 may be a method based on conventional techniques such as injection molding and extrusion molding. In manufacturing, it is preferable to prepare a long object, cut it to a required size, and provide a screw hole 15 and a cutting part for attachment.

In the illustrated embodiment, the locking claws are formed outside the second protruding strip 12, and are formed so that there is an appropriate gap between the second protruding strip 12 and the third protruding strip 13. I do. That is, the tip of the third projection 13 is flattened, and the second projection 12 is located at a position facing the tip, and a flat portion is also provided at a root portion adjacent to the tip of the third projection 13. Further, the outer side of the second protrusion 12 is formed in a shape inclined.

The coaxial cable holder includes, for example, a first protrusion 11, a second protrusion 12 serving as the locking claw, and a fourth protrusion 11.
The protrusions 14 are arranged so as to surround the coaxial cables 31 and 32 and to have a small contact surface as shown in the cross-sectional view of FIG. The gap between the first protruding strip 11 and the second protruding strip 12, which is the insertion gap for the coaxial cables 31 and 32, is formed slightly smaller than the outer diameter of the coaxial cables 31 and 32. Therefore, the coaxial cables 31 and 32 are inserted in a state of expanding the gap due to the elasticity of the synthetic resin, so that the coaxial cables 31 and 32 can move inside in the axial direction, but do not fall off easily.

Since these protrusions can be designed according to the number and position of the output terminals of the converter, the coaxial cable,
No force is applied to the F-type plug or the F-type plug seat.

When the cover 10 and the arm body 20 include the above-described coaxial cables 31 and 32 over substantially the entire length as shown in the drawing, the locking claw of the cover 10 can improve the airtightness, and the water and the like can be obtained. Can be effectively prevented. Alternatively, although not shown, a structure in which a locking claw or the like is partially formed may be employed.

As shown in the cross-sectional view of FIG. 1 illustrating the converter support arm in the present embodiment, it is desirable that the arm body 20 be curved upward so that rain, snow, dust and the like do not accumulate. Although the converter support arm of the present embodiment is entirely linear, it may be curved as a whole. Further, the lower surface of the cover 10 may be flat or may be curved similarly to the arm body 20.

The method for assembling the parabolic antenna of the present invention will be described in detail.

(1) The mount 3 is erected, and the reflecting mirror 2 is fixed to the mount 3.

(2) The arm body 20 is screwed through a screw hole 25 of the arm body 20 or by a bolt and a nut.
Is fixed to the mount 3. Alternatively, when the mount 3 is made of sheet metal, it may be fixed by spot welding.

(3) The ends of the first protrusion 11 and the fourth protrusion 14 of the cover 10 are cut in advance, and the second protrusion 12 is cut.
Converter 4 with feed horn in the space created between
Fit the end of

(4) The F-type plug 33 attached to the ends of the coaxial cables 31 and 32 is connected to the F-type plug seat 41 provided on the converter 4 with the feed horn, and the cover 10
Hold the coaxial cables 31 and 32. The coaxial cables 31 and 32 are inserted in a state where the gap between the first protrusion 11 and the second protrusion 12 is expanded.

(5) The cover 10 is pushed up from below the arm body 20 so that both ends 21
Is fitted between the second protrusion 12 and the third protrusion 13 of the cover 10. Then, the bolt 4 penetrating the screw hole 25, the converter 4 with the feed horn, and the screw hole 15
2 and a nut 43 for fixing. Thus, the assembling of the parabolic antenna of the present invention is completed.

The parabolic antenna of the present invention is characterized in that (3)
Since the operations of (4) and (4) can be prepared indoors, the installation work is extremely simple even when the apparatus is installed on a veranda or a rooftop.

For the purpose of describing the present invention, the structures and shapes of the illustrated components can be changed based on conventional techniques. In this embodiment, the combination using the arm body on the upper side and the cover (bottom cover) on the lower side is adopted, but a combination using the cover (lid cover) on the upper side and the arm body on the lower side may be used. . Further, the cable holder may be attached to the arm body.

[0031]

According to the parabolic antenna of the present invention, since the converter supporting arm has a structure in which the cover is fitted to the arm body and the coaxial cable is passed through the inside, the assembling is easy. In addition, since there are few small parts, troubles caused by loss of the small parts can be prevented even in a place such as a rooftop where the working environment is poor.

Further, since the coaxial cable can be held in the converter support arm, it is possible to prevent the coaxial cable from falling off, bending, and breaking the electric wire in the coaxial cable. further,
The coaxial cable can be protected from wind, rain, snow, salt damage, etc.

Further, at the time of assembly, with respect to the reflecting mirror,
Another feature is that the converter with the feed horn can be positioned reliably and easily.

[Brief description of the drawings]

FIG. 1 is a sectional view showing an embodiment of a converter supporting arm of a parabolic antenna according to the present invention (a sectional view taken along the line AA in FIG. 2).

FIG. 2 is a perspective view showing one embodiment of the parabolic antenna of the present invention.

FIG. 3 is a sectional view taken along line BB of FIG. 2;

FIG. 4 is a perspective view showing an arm main body of a converter support arm.

FIG. 5 is a perspective view showing a cover of the converter support arm.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Converter supporting arm 2 Reflector 3 Mount 4 Converter with feed horn 10 Cover 11 First protrusion 12 Second protrusion 13 Third protrusion 14 Fourth protrusion 15, 25 Screw hole 20 Arm body 21 Both ends in short direction 31 , 32 Coaxial cable 33 F-type plug 41 F-type plug seat 42 Bolt 43 Nut

Claims (3)

[Claims] 1. A satellite dish receiving parabola antenna comprising a mount, a reflector, a converter support arm, and a converter with a feed horn attached to the converter support arm, wherein the converter support arm comprises an arm body and A parabola antenna for receiving satellite broadcasting, wherein a coaxial cable which comprises a cover and transmits an output signal of the converter is passed between the arm body and the cover. 2. The arm body is formed so that both ends in the short direction face each other, the cover is made of an elastic synthetic resin, and a locking claw that locks both ends in the short direction.
The parabolic antenna for receiving satellite broadcasting according to claim 1, further comprising a coaxial cable holder having a structure for holding the coaxial cable by elasticity, wherein the arm body and the cover are assembled integrally with each other by airtight fitting. 3. The satellite broadcast according to claim 1, wherein one end of the arm is connectable to the mount, and one end of the cover is connectable to the converter with a feed horn. Parabolic antenna for reception.