JPS6320182Y2 - - Google Patents

Description

[Detailed explanation of the invention] This invention relates to an antenna used for receiving UHF television waves, and more specifically to a reflector in the antenna.The purpose of this invention is to create a large number of reflecting elements, each of which is thin. A reflector for a UHF television receiving antenna that can be used to reduce weight and manufacturing costs, and also has sufficient mechanical strength and good electrical characteristics. The goal is to provide the following.

The drawings showing the embodiments of the present application will be described below. In the reflector A, 1,1 is a support, which is made of a lightweight synthetic resin material with good electrical insulation (e.g.
Manufactured by molding ABS or ASA resin. In this support 1, reference numeral 2 denotes a base, in which a fitting groove 3 and a through hole 4 are formed, which are elongated in a direction parallel to the axis of the reflector. Incidentally, these fitting grooves 3 and through holes 4 constitute a connecting portion to a base body, which will be described later. Reference numerals 5 and 5 denote extension arms, which are extended symmetrically from the base 2 upward and downward (on one side and the other side with respect to the polarization plane of the antenna). Reference numeral 6 denotes a through hole for fixing the reflective element, and as shown in FIG. 4, it has a two-stage structure with a stepped portion 7 for engagement. 8 indicates a fixed seat, and 9 indicates a bottomed insertion hole.

Next, reference numerals 11 and 12 are reflective elements, which are made of a metal material with good conductivity and have a thickness of several mm. The material and shape (pipe or round bar)
Any pipe as mentioned above may be used, but from the viewpoint of weight and cost, it is most preferable to use an aluminum pipe. The reflective elements 11 and 12
Among them, the element 11 also serves as a connecting member as described later, and the thickness of the normal reflective element 12 (2 to 4 mm)
Thicker (4 to 10 mm) is used. Further, the lengths of these elements 11 and 12 are determined depending on the frequency of UHF television waves to be received, and generally a dimension between 500 mm and 310 mm is selected. Furthermore, these reflective elements 11,1
2, 12... are all arranged in parallel,
Further, the mutual spacing is set to be equal, or to a space that gradually becomes wider toward the distal end of the take-out arm 5 at a well-known rate.

Next, reference numeral 13 denotes an intermediate connector, which is made of the same material as the support 1. In this connecting body 13, 1
4 and 15 are through holes for inserting the elements 11 and 12, respectively. Note that movement of the connecting body 13 in the direction of arrow 16 with respect to the elements 11 and 12 is prevented by tightly inserting the elements 11 and 12 into the through holes 14 and 15; This may be carried out by any method such as bonding with an adhesive or welding with heat. Further, the number of the connecting bodies 13 may be two or more if the lengths of the elements 11 and 12 are long. In that case, the mounting position is preferably a position where the entire length of the elements 11 and 12 is equally divided.

Next, the assembly of the reflector A having the above structure will be explained. First, one reflective element 11 and a plurality of reflective elements 12 are inserted into the intermediate connector 13 to a predetermined position as shown in FIG. 3, and held by a jig not shown. The support 1 is attached to each recess 18 of a pair of jigs 17 facing each other. In this case, it goes without saying that the through hole 6 and the insertion hole 9 and the elements 11 and 12 are positioned to face each other. Then, push the jig 17 in the direction of arrow 20 to
1 into the through hole 6, and the end of the element 12 into the insertion hole 9.
Insert each into. (See Figure 4 A, B and Figure 5)
Subsequently, as shown in FIG. 4C, the forming punch 19 is pressed in the direction of the arrow 20a to spread out the end portion 11a of the element 11 so that the end portion 11 is engaged with the stepped portion 7.

Through the above operations, both the supports 1, 1 are tightened by the elements 11, and a large number of elements 12 are sandwiched between both the supports 1, 1, and the reflector A is completed. .

By incorporating the punch 19 into the jig 17, the deformation operation of the end portion 11a of the element 11 can be performed simultaneously when the jig 17 is pushed in the direction of the arrow 20.

Alternatively, the reflective element 11 may be replaced with the first, second or third reflective element 12 from the tip of the carrying arm 5, and the above-mentioned supports 1, 1 may be tightened at the replaced location.

Next, the reflector A having the above structure is attached to a base body 23 having a structure as shown in FIG. 6, for example, and is used in the state shown in FIG. 7. That is, in these figures, 21 is a mast, and 23 is a rod-shaped base supported by the mast 21.The back of the base 23, which is in the form of a horizontal structure, is equipped with a mast connector as is well known, and is connected to the mast 21. The connection is being carried out. Reference numeral 24 denotes a fitting strip formed in a protruding manner on both end surfaces of the base body 23, and is formed to be long in a direction parallel to the axial direction of the take-out rod 27 that supports the radiator 28. Reference numeral 25 indicates a screw hole, and reference numeral 26 indicates a fixing screw. In the main part 22 of the antenna, 27 is a lever extending from the center of the front surface of the base 23, and a radiator 28 and a waveguide 29 are attached at known predetermined intervals.

The reflector A is attached to the base body 23 as described above by fitting the fitting grooves 3, 3 formed on opposing surfaces of each support body 1, 1 of the reflector at an intermediate position in the longitudinal direction (base portions 2, 2). The above-mentioned fitting strips 24, 24 are fitted while sliding in the direction of the grooves, and the fixing screw 26 is further screwed into the screw hole 25 through the through hole 4, and both supports 1, 1 are attached to the base 23. be fixed at both ends of the As a result, an antenna as shown in FIG. 7 is completed.

As described above, in this invention, the many reflective elements 11, 12 are supported at both ends by the supports 1, 1, so of course when the reflective elements 11, 12 are short, Even if they are long, the reflecting elements 11 and 12 can be maintained at a predetermined interval during use, and the UHF TV radio waves can be well reflected toward the radiator 28, allowing it to function as an antenna. There are effects in use that can improve gain characteristics and front-to-back ratio characteristics.

Moreover, since the plurality of reflective elements 11 and 12 are connected at their intermediate parts by the intermediate connecting body 13, the intermediate parts of the individual reflective elements 11 and 12 are connected to other parts through the connecting body 13. It has the advantage that it can be supported by reflective elements, that is, the span that must be self-supporting can be shortened.
This means that thin materials can be used for the reflective elements 11 and 12, which has the effect of reducing the weight of the reflector and lowering the material cost. When installed and used, it is possible to suppress twisting and deflection of the reflective elements 11 and 12 even when the wind blows, thereby maintaining good reception conditions as described above.

Furthermore, in the present invention, as described above, the reflective element 1
1 and 12 are supported at multiple locations at both ends and in the middle, both the support body 1 and the connecting body 13 are made of lightweight synthetic resin material, so the weight of the entire reflector is reduced. This has the effect of making it relatively lightweight. Further, as described above, a plurality of reflective elements 11,
Even if both ends and the middle of the elements 11 and 12, that is, the ends and middle of the elements 11 and 12, in which current and voltage are distributed in the radio wave receiving state, are connected to each other, the connection is made using a material with good electrical insulation as described above. Since it is carried out using the support body 1 and the connecting body 13 made of synthetic resin material,
Even if the reflective element sways due to wind blowing during use, it is possible to prevent the generation of electrical noise at the connecting portion, thereby maintaining a high-quality screen reception state. Moreover, according to the present invention
The UHF TV receiving antenna is
By removing the fixing screw 26 shown in the figure and pulling out the fitting groove 3 from the fitting strip 24, the reflector A has a large vertical shape and the radiator 2 protrudes forward.
By separating the reflector A and the radiator 28, the reflector A and the radiator 28 can each be made into a flat shape (small in bulk). When assembling, simply by fitting the fitting strip 24 and the fitting groove 3, the electrical positional relationship such as the vertical relationship and depth relationship of the reflector A with respect to the radiator 28 can be accurately determined. Also, it has practical effects such as good mechanical integrity and durability.

[Brief explanation of drawings]

The drawings show an embodiment of the present application, and FIG. 1 is a perspective view of a reflector, FIG. 2 is a partial perspective view showing the relationship between the reflective element, the intermediate connector, and the support, and FIG. 3 is a perspective view of the reflector. A front view showing the relationship between the device and the jig for assembling it, Figure 4 is a diagram showing the procedure for connecting the reflective element and the support, and Figure 5 is a diagram showing the connection between the reflective element and the support. FIG. 6 is a cross-sectional view showing the combined state, FIG. 6 is a perspective view of the base, and FIG. 7 is a perspective view showing the combined state of the base and the reflector. 1...Support, 11, 12...Reflection element, 13
... intermediate connector, 23 ... base, 28 ... radiator.

Claims (1)

[Scope of utility model registration request] The center of the base body 23 is equipped with a radiator 28 for receiving UHF television waves, which is supported by a take-out rod 27 that extends in the direction of arrival of UHF television waves, and reflectors are provided on both sides of the base body 23. Fixing each intermediate position 2, 2 of the pair of supports 1, 1 at A,
The above UHF from reflector A to the above radiator 28
In a UHF television receiving antenna designed to reflect television radio waves, the reflector A is
It is composed of a pair of supports 1, 1 that are spaced apart from each other and facing each other, and a large number of reflective elements 12 made of metal material installed between the pair of supports 1, 1, and the above-mentioned. Each of the supports 1, 1 is made of a lightweight synthetic resin material with good electrical insulation properties, and the plurality of reflective elements 12 are juxtaposed at a predetermined distance from each other, and both ends of each are connected to the pair of reflective elements 12. The intermediate portions of the plurality of reflective elements 12 fixed to the supports 1, 1 are interconnected by intermediate connectors 13 made of a lightweight synthetic resin material with good electrical insulation properties. In addition, the base body 23 and the pair of supports 1, 1 are fixed to each other in the middle of each support body 1, 1 in the longitudinal direction with respect to the fitting strips 24 provided on both end faces of the base body 23. position 2,
The fitting grooves 3, 3 formed on the opposing surfaces of the base body 23 are fitted into the fitting grooves 3, 3, and the supports 1, 1 are provided at intermediate positions 2, 2 on both end faces of the base body 23, respectively. A UHF television receiving antenna characterized in that the UHF television receiving antenna is fastened and fixed with set screws 26 and 26 that pass through the holes 4 and 4.