JPH036012Y2 - - Google Patents

Description

[Detailed description of the invention] A. Field of industrial application The present invention relates to an indoor TV antenna installed indoors to receive TV radio waves, and includes a VHF TV radio wave receiving antenna and a UHF TV radio wave receiving antenna. This invention relates to an indoor television antenna that uses the same axis to facilitate installation and assembly, reduces the number of adjustment points on the installation part, and aims to be more convenient to carry.

Note that the VHF television radio wave receiving antenna referred to herein is a general term that also includes FM broadcast receiving antennas.

B. Conventional technology Conventional indoor television antennas have VHF
The antenna for receiving TV radio waves and the antenna for receiving UHF TV radio waves are each installed separately and independently, and because the structures of the two antennas are different, the mounting structures are also different.

C. Problems that the invention aims to solve As mentioned above, in the conventional indoor TV antenna, each antenna was made independent and attached using different means. Installation adjustments had to be made at four locations in total. Therefore, it was very difficult to match the tightening balance between the mounting parts. Furthermore, since there are many attachment points, the amount of parts used and the amount of effort required are increased, which is one of the causes of increased costs. If I wanted to move it further, I would have to hold the base with both hands as I had nowhere to grab it.

D. Means for solving the problem This invention reduces the number of antenna attachment points by sharing antenna attachment members, which halves the number of parts used and the work process, and significantly reduces the effort required for adjustment. It is designed to be easily carried, and its structure is such that a conductive horizontal shaft is attached to both sides of the main body, which is horizontally rotatable on a base, and penetrates into the main body. Each end of the horizontal shaft exposed to the outside of the main body
The base end of the VHF TV radio wave receiving antenna is pivotally mounted, and a spacer made of an insulating material is fitted onto the horizontal shaft between the pivot joint and the main body, and the spacer is shaped like an inverted U. The UHF TV radio wave receiving antenna is inserted into the insertion holes of the UHF TV radio wave receiving antenna which has insertion holes at both ends thereof, and the ends of the UHF TV radio wave receiving antenna are tightened on the spacer axis. The TV radio wave receiving antenna can be raised and lowered back and forth using the insertion hole as a fulcrum, and furthermore, each base end of the horizontal axis that penetrates into the main body and the UHF
The reason is that lead wires are connected to each end of the TV wave receiving antenna.

E. Function Using the horizontal shaft attached to the body to penetrate it, it can be used as a VHF TV reception antenna.
Since the UHF TV radio wave receiving antenna is attached to the same location while maintaining mutual insulation, the number of attachment points can be reduced to two instead of four in the past. It also had an inverted U shape.
The UHF TV radio wave receiving antenna is provided above the main body in a hand-shaped manner.

F. Embodiment The drawing shows the indoor television antenna of the present invention. 1 has a metal (iron) back cover fitted to the bottom to reduce the weight so that it can be stably placed on or near a television receiver. The base 1 is provided with a horizontal back surface and is provided with an antenna element changeover switch 2 and a spherical rotary body 3 that can be rotated horizontally. The rotary body 3 has a structure in which circular through holes are formed on both sides and is divided horizontally into two parts from the center, and when the upper separator 3a is removed, a hemispherical through hole is formed on the separation surface. The halves 4, 4 are each recessed. Reference numeral 5 denotes a horizontal shaft made of metal, and the horizontal shaft 5 includes a spacer 8 having a large diameter portion 7 formed integrally with the cover 6a at the center of the cover 6a, which is also shaped like a shear. The cover 6b is placed in the center of the cover 6b.
and a spacer 10 having a large diameter portion 9 integrally formed with the spacer 10 are inserted into the case 6 formed by fitting the covers 6a and 6b together with the spacers abutted against each other. The outer wall of the cover 6a is provided with two locking protrusions 11 having an L-shaped cross section in the vertical direction.
The case 6 is attached to the main body 1 by locking it to the peripheral wall of the through hole 4. These base 1, rotating body 3, covers 6a, 6b, and a spacer having large diameter portions 7, 9 integrally formed with the covers,
8, 10, etc. are made of synthetic resin (ABS resin) with relatively low dielectric loss and high insulation properties. In addition, a cutout groove 12 is formed along the circumferential surface in the upper half of the outer circumference of the cover 6a, and the cutout groove 12 is formed in the upper half of the outer circumference of the cover 6a.
The end of the UHF TV radio wave receiving antenna 13,
Insert through the cutout groove 12 and insert into the insertion hole 13a.
By inserting the spacer 10 into the
A UHF television radio wave receiving antenna 13 is provided so as to be tiltable back and forth within the cut range of the cutout groove 12 with the horizontal axis 5 as the center. horizontal axis 5
Rod antennas 14, 14 for receiving VHF TV radio waves are respectively pivotally attached to the tips of the antennas, and can be adjusted so as to have directivity in the direction in which the radio waves arrive.
The base end side of the horizontal shaft 5 has a threaded portion 5a, and by screwing a nut 15 into the threaded portion 5a, the shaft is fixed and the end of the UHF TV radio wave receiving antenna 13 is fixed. The large diameter portions 7 and 9 are fastened together on the spacer axis by the side walls of the large diameter portions 7 and 9. In this way, both antennas are kept insulated from each other by the interposition of the spacer, and the UHF television radio wave receiving antenna is provided above the main body in a downward-hanging manner. Further, lead wires 16 are connected to both ends of the UHF television radio wave receiving antenna 13 with screws through lug fittings 16a, and a lug fitting 17a is tightened with the nut 15 on the horizontal shaft 5. The lead wire 17 is inserted through the lug fitting 17a.
is connected. The other ends of both lead wires 16 and 17 are connected to the antenna element switching switch 2.
The element changeover switch 2 of the antenna has wiring for switching between the respective terminals, and a feeder line is connected to the output terminal of the element changeover switch 2 of the antenna.

In the indoor television antenna of this embodiment, the position of the lug fitting 17a is regulated by two small protrusions 18 provided on the outer wall of the cover 6a, and the horizontal axis 5 is rotated by the operation of the rod antenna 14. However, the lug metal fittings 17a do not rotate together with the horizontal shaft 5, so that accidents such as the lead wires 17 being twisted or entangled do not occur. Also, the horizontal axis is
A spacer 8 having a large diameter portion 7 is attached to the spherical rotating body 3 via a case 6 formed by fitting integrally formed covers 6a and 6b, but the cover is separate from the spacer. or use
Fix it directly through the main body, or use UHF
There is no problem even if the mounting end of the TV radio wave reception antenna is fixed in a state where it is exposed outside the main body. In short, the UHF TV radio wave receiving antenna has a conductive horizontal axis to which the VHF TV radio wave receiving antenna is pivotally mounted, insulation is ensured by the spacer, and both antennas are attached to the main body with the same horizontal axis. Each antenna is adjusted for best reception and held in any position under normal mounting conditions (slight or weak vibration).
However, when making adjustments, it is only necessary to be able to lightly adjust the UHF television reception antenna 13 and the rod antenna 14 by hand.

G. Effect In the indoor TV antenna of the present invention, the VHF TV radio wave receiving antenna and the UHF TV radio wave receiving antenna are installed by one horizontal axis on each side while maintaining insulation from each other. The number of installed parts can be halved without causing radio wave interference. Therefore, the installation work is reduced to half of the conventional work, and the adjustment of the tightening balance of the installation part is greatly simplified. Also, it is reasonable that a rod antenna for receiving VHF TV radio waves is pivotally attached to the tip of the horizontal shaft, and the horizontal shaft is fastened on the spacer shaft through which the horizontal shaft is inserted to the end of the antenna for receiving UHF TV radio waves. The attachment means simplifies the structure and improves productivity. Moreover, since the UHF television radio wave receiving antenna is provided in a hand-down manner above the main body, it can be easily carried by holding the UHF television radio wave receiving antenna when moving.

As described above, the present invention is extremely effective in streamlining workability and facilitating portability in indoor television antennas, and its practical benefits are considerable.

[Brief explanation of the drawing]

Fig. 1 is an exploded perspective view of an indoor television antenna according to an embodiment of the present invention, Fig. 2 is an assembled perspective view of the same, and Fig. 3
The figure is a sectional view of the attachment part. DESCRIPTION OF SYMBOLS 1...Base, 2...Antenna element switching switch, 3...Rotating body, 3a...Separator, 4...One half of through hole, 5...Horizontal axis, 5a
... Threaded part, 6 ... Case, 6a, 6b ... Cover, 7 ... Large diameter part, 8 ... Spacer, 9 ... Large diameter part, 10 ... Spacer, 11 ... Locking protrusion, 12
... Cutout groove, 13 ... UHF television reception antenna, 13a ... Insertion hole, 14 ... Rod antenna, 15 ... Nut, 16 ... Lead wire,
16a...Lug fitting, 17...Lead wire, 17a
...Lug metal fittings, 18...Small protrusions.

Claims (1)

[Claims for Utility Model Registration] 1. A conductive horizontal shaft is attached to both sides of a main body that is horizontally rotatable on a base, with the conductive horizontal shaft penetrating into the main body, and the horizontal shaft is connected to the outside of the main body. The base end of a VHF TV radio wave receiving antenna is pivotally attached to each exposed tip, and a spacer made of an insulating material is fitted around the horizontal axis between the pivot joint and the main body, and the spacer is , UHF with an inverted U-shape and insertion holes at both ends.
By inserting each antenna into the insertion hole of the TV radio wave receiving antenna and tightening the end of the UHF TV radio wave receiving antenna on the spacer axis, the UHF TV radio wave receiving antenna uses the insertion hole as a fulcrum. It can be raised and folded back and forth, and each base end of the horizontal axis that penetrates into the main body and the UHF
An indoor television antenna characterized in that lead wires are connected to each end of the television radio wave receiving antenna. 2. According to claim 1 of the utility model registration claim, the connection between the horizontal shaft and the lead wire is that a lug fitting is rotatably screwed to the horizontal shaft, and a lead wire is joined to the lug fitting. Indoor antenna for TV as described.