JPS6320171Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a television receiving antenna, and particularly relates to an improvement for attaching a reflector base to the tail end of the antenna boom.

In general, in a TV antenna, each element of a waveguide and radiator is attached to an antenna boom that is installed almost horizontally at the top of an antenna pole, while a reflector is used to reflect waves perpendicular to the waveguide surface formed by the waveguide and radiator. Since it is necessary to form a surface, a reflector base having a plurality of reflector elements arranged in parallel is assembled so as to be attached perpendicularly to the tail end of the antenna boom.

For example, in a relatively small UHF band receiving antenna, a cylindrical hole is formed in the center of the reflector base into which the tail end of the antenna boom is inserted, and the boom tail end is inserted into this cylindrical hole. Later, a method is used in which a screw is inserted through the tail end of the boom from the outside of the cylindrical hole to fix the two together.

However, when using this type of attachment method, it is difficult to remove the reflector base once it has been attached to the boom if the screws are corroded, especially when replacing the reflector at a high place. When performing such removal work, there are problems such as danger associated with the work and falling tools. Another problem is that assembly cannot be carried out quickly.

This proposal was made to solve the problems of conventional antennas as described above, and it not only allows the reflector base to be directly attached to the boom by simply inserting it without using any tools during assembly, but also allows the reflector base to be directly attached to the boom. The object of the present invention is to provide an improved television receiving antenna whose base rod can be easily removed.

This invention will be described in detail based on the illustrated embodiment.
In FIG. 1, 1 is an antenna pole, 2 is an antenna boom, 3 is a waveguide, 4 is a radiator, 5 is a reflector, and 6 is a reflector base. As shown in FIGS. 2 and 3, the reflector base 6 is provided with a cylindrical hole 7 into which the tail end of the antenna boom 2 is inserted from the front surface. This tube hole 7 is perpendicular to the axial direction of the reflector base rod 6, and window holes 17, 17 are provided in the bottom wall at the back of the tube hole.

In addition, two cut grooves 8, 8 are provided in the inner walls 9, 10, which are provided facing each other to form the cylindrical hole 7, at positions slightly apart from the axial center of the inner walls. are used as elastic tongue pieces 13 and 14. This tongue piece is extended and extends out of the window hole 17, and has free ends 15 and 16 at its ends.

Each of these tongues 13 and 14 has a tapered surface that gradually increases in height toward the free end at the front thereof, and an engagement wall that is perpendicular to the tongues 13 and 14 at the rear. Locking protrusions 11 and 12 are provided. The free ends 15, 16 of these tongues 13, 14 are provided to extend outward through the window hole 17 to the outside of the back surface of the base rod, and the free ends 15, 16 of these tongues 13, 14 are inserted into the back surface of the base rod by the fingertips. It is desirable to be able to open the door easily.

On the other hand, the tail end of the antenna boom 2 inserted into the base rod tube hole 7 has tongue pieces 13 and 1 in the tube hole 7.
Through-holes 18 and 19 are bored into which the locking projections 11 and 12 of antenna boom 2 are fitted.
When the tail end of the boom 2 is inserted into the cylindrical hole 7 of the reflector base rod 6, the locking protrusions 11, 12 of the tongue pieces 13, 14 automatically engage with the through holes 18, 19, and the boom 2 and base It is engaged and fixed integrally with the rod 6.

The antenna according to the present invention is based on the reflector base 6 as described above.
A cylindrical hole 7 to be inserted into the tail end of the boom 2 is provided, and tongue pieces 13, 14 having locking protrusions 11, 12 and one free end are provided on the inner wall facing the cylindrical hole 7. When attaching the boom 2 and the reflector base 6, the tongue pieces 13 and 1 can be attached by simply inserting the tail end of the boom 2, which has through holes 18 and 19, into the cylindrical hole 7.
The locking protrusions 11 and 12 of No. 4 can be engaged in the through holes 18 and 19, and the assembly work can be performed extremely efficiently.

When removing the base rod 6 from the boom 2 for replacement, etc., the protrusions 11, 12 can be removed by pushing open the free ends 15, 16 of the tongues 13, 14 with your fingertips as shown by the arrows in FIG. will come out of the through holes 18 and 19, so just pull out the boom 2 as it is. In this case, if the free ends 15, 16 of the tongues 13, 14 are provided so as to extend outward from the back surface of the base rod 6, the operation can be made much easier.

In the above explanation, the antenna boom 2 is provided with a locking hole 18, and the reflector base rod 6 is provided with tongue pieces 13, 14 and locking protrusions 11, 12. Attach the piece and the locking protrusion to the reflector base 6.
It is possible to lock each other even if a through hole is provided in the two.

In this way, according to the present invention, no tools are required for both the installation and removal of the antenna boom and the reflector base, and the reflector base can also be molded with synthetic resin, and furthermore, it is possible to mold the reflector base with synthetic resin. Since an elastic tongue piece with an engaging part with the antenna boom is provided inside, no special space is required for the engaging part, and since it is formed so that the outer circumferential wall of the antenna boom is joined to the cylindrical hole, it is solid. It has various advantages such as easy installation, and its practical effects are extremely large.

[Brief explanation of the drawing]

Fig. 1 is an overall perspective view of the TV reception antenna according to the present invention, Fig. 2 is a perspective view of the main parts showing the relationship between the antenna boom and the reflector base of the TV reception antenna shown in Fig. 1, and Fig. 3 is a cross-sectional view of the main part of the antenna boom attached to the reflector base of the TV receiving antenna shown in Figure 1, and Figure 4 is a perspective view of the back of the reflector base of the TV receiving antenna shown in Figure 1. It is a diagram. 1... Antenna pole, 2... Antenna boom, 3... Wave director, 4... Radiator, 5... Reflector, 6... Reflector base, 7... Cylindrical hole, 8... Notch Groove, 9, 10... Inner wall, 11, 12... Locking protrusion, 13, 14... Tongue piece, 15, 16... Free end, 17... Window hole.

Claims (1)

[Scope of utility model registration request] In a television receiving antenna in which a reflector base rod to which a reflector is attached is installed orthogonally to an antenna boom, a cylinder provided on the reflector base rod and formed to join with an outer circumferential wall in the axial length direction of the antenna boom. a hole, a window hole provided in the bottom wall of the cylindrical hole,
A television receiving antenna comprising an elastic tongue having a free end for removal extending from the window hole and having an engaging portion in the cylindrical hole that engages with the antenna boom. .