JPH0129850Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of industrial application] The present invention relates to an antenna device used by being attached to a radio, television, etc. The present invention relates to an antenna device that has an improved refraction shaft support structure that is tiltably and rotatably supported on a support holder made of resin.

[Conventional technology]

Conventionally, in table-top dipole antenna devices used to be attached to radios, televisions, etc., the connecting fitting fixed to the base end of the antenna element is made of synthetic resin, as seen in, for example, Japanese Utility Model Application Publication No. 14211/1983. It is known that the support holder is pivotally supported in a tiltable manner with bolts and nuts. And as a support holder, this is split into two,
Some of them are integrally molded, and in all of them, the connection fittings are inserted into the recesses on the top of the support holder, and the side walls of the holder are secured with fixing bolts.
It was designed to be tightened with a nut to obtain rotational torque.

[The problem that the idea aims to solve]

In an antenna device with a refraction shaft support structure as described above, when the tightening force of the bolts and nuts is increased, the support holder made of a synthetic resin molded product will move in the direction in which both side walls of the recess into which the connecting fitting is fitted become closer to each other. There is a problem in that the contact surface of the connection fitting deforms and the pressure contact surface contacts unevenly, making the rotation torque unstable.There is also the problem that the support holder made of synthetic resin can crack and be damaged, and these problems can be prevented. In order to do this, the entire support holder must be made of a high-strength synthetic resin, which poses problems such as increased production costs.

An object of the present invention is to provide an antenna device proposed with the intention of solving the above-mentioned problems.

[Means to solve the problem]

In order to achieve this purpose, the antenna device according to the present invention has the following features: (A) The flat connecting part of the connecting fitting connected to the base end of the antenna element is sandwiched between metal clamping fittings arranged oppositely on both sides thereof. By tightening the fixing bolts and nuts inserted through these, the flat connecting part of the antenna connection fitting is pivotably supported by a metal clamping bracket so that it can be tilted with the required rotation torque, (B) the clamping bracket mentioned above. is positioned and accommodated between a pair of support holder members composed of mating members made of synthetic resin, and the clamping fittings, the heads of fixing bolts, nuts, etc. are internalized within the support holder member by coupling the support holder members. It is characterized by:

[Effect]

In such a configuration, the tightening force exerted by the fixing bolt and nut for pivotably supporting the connection fitting of the antenna element in a tiltable manner does not act on the synthetic resin support holder member, and the tightening force is applied between the support holder members. Since the structure is such that the tightening force is obtained through the metal clamping fittings arranged oppositely, even if the tightening force of the fixing bolts and nuts is increased, the synthetic resin support holder member will not be adversely affected. By appropriately adjusting the above-mentioned tightening force, the tilting holding force of the antenna element can be set as desired.

Furthermore, even if the support holder member is an inexpensive synthetic resin molded product, there is no risk of damage such as deformation or cracking as in the past, so manufacturing costs can be reduced by molding it from inexpensive materials. You can also do that.

Furthermore, the clamping fittings that support the connecting fittings of the antenna element in a refracting axis, the heads of fixing bolts, nuts, etc. are housed between the opposing support holder members and are not exposed to the outside, so that the appearance is improved in terms of design.

〔Example〕

An embodiment of the present invention will be described below with reference to the accompanying drawings. The illustrated embodiment shows an example of a twin-pole antenna device, and reference numeral 1 in the figure indicates an antenna element, and a connecting fitting 2 is fixed to the base end of the antenna element 1 as in the conventional example. The lower end of the connecting fitting 2 has a flat connecting portion 2a provided with a screw insertion hole 2b. The connecting fittings 2 of the pair of antenna elements 1 are individually pivoted so as to be tiltable, as will be explained below.

That is, washers 3, 3 made of eyelet-shaped copper plates are fitted into the screw insertion holes 2b of the flat connecting portion 2a of the connecting fitting 2 from both sides, The press-contact parts 4a, 4a of the metal clamping fitting 4 are brought into contact with each other, and the fixing bolt 5 is inserted through this via the spring washer 7, and by tightening the nut 6, the flat connecting part 2a of the connecting fitting 2 is rotated properly. The structure is such that it is supported on a bending axis so that it can be tilted with dynamic torque.

The clamping fitting 4 is made of a single metal plate in which a pair of pressing parts 4a, 4a facing each other are connected to each other by a bottom plate 4c via mounting parts 4b, 4b, and the mounting parts 4b, 4b are connected to each other by a bottom plate 4c. As described later, 2
It is attached to one opposing surface of the support holder members 8 and 9 which are divided into two parts.

The support holder members 8 and 9 are each made of a synthetic resin molded product, and the mounting portions 4b and 4b of the above-mentioned clamping fitting 4 are interposed between them on the opposing surface of one of the support holder members 8. The clamping fitting 4 is fixed by being tightened and fixed with the tapping screw 11 through the collar 10, and in this fixed state, the head 5a of the fixing bolt 5 is inserted into the blind hole 8a opening on the opposing surface of the support holder member 8.
are closely fitted. Further, the support holder members 8 and 9 are coupled together by press-fitting spring pins 12 into blind holes 8g and 9c, one in the upper part and two in the lower part, respectively, which are opened in the opposing surfaces. The other support holder member 9
The nut 6 is inscribed and fitted into a blind hole 9a that is open on the opposing surface.

With these, the clamping metal fitting 4 is positioned and housed between the pair of support holder members 8 and 9 facing each other, and the antenna connecting metal fitting 2 is inserted through the opening 13 on the upper surface of the joint of the support holder members 8 and 9. It is projected upward. Further, a feeder 14 is inserted into the space between both support holder members 8 and 9 from an insertion opening 9b provided at the lower end of the other support holder member 9, and this feeder 14 is inserted into a punched hole 14a provided therein. is engaged with a feeder retaining protrusion 8b protruding from the inner surface of one of the support holder members 8, and the lug terminal 15 connected to the tip of the feeder 14 is secured to the clamping metal fitting 4 by the tapping screw 11.
It is tightened and fixed. Left as above,
The connection fitting 2 of the right antenna element 1 is held by the support holder members 8 and 9 through the holding fitting 4, respectively, and the protruding piece 4 protrudes from the mounting portion 4b of the holding fitting 4.
d, the feeder 14 is pressed against the seat 8c provided on the inner surface of one of the support holder members 8.

On the side of the above-mentioned support holder member 8, a fitting cylinder portion 8d is provided on the lower surface thereof and protrudes downward.
Vertical slits 8e extending along the axial direction are formed at six locations in the circumferential direction, and the fitting cylindrical portion 8
A locking annular portion 8f formed at the lower end portion of d is configured to be able to reduce its diameter. And this fitting cylinder part 8
d is rotatably inserted into the fitting hole 16a provided on the upper surface of the base 16, and as a result of this insertion, the locking annular portion 8f at the lower end is reduced in diameter and protrudes from the fitting hole 16a, and the protruding locking By restoring and locking the annular portion 8f to the lower surface periphery of the fitting hole 16a, the support holder member 8 and the support holder member 9 integrated therewith are horizontally attached to the base 16 via the fitting tube 8d. It is rotatably mounted. Note that the spring pin 12 described above is formed by forming a split portion having continuous mountain-shaped side edges along the axial direction.

In the antenna device of the embodiment configured as described above, the antenna element 1 operates in a tiltable manner as the connecting fitting 2 rotates about the fixing bolt 5 as a rotational fulcrum. The torque is not related to the synthetic resin support holder members 8 and 9, but is applied to the pressure contact parts 4a, 4a of the clamping fitting 4 by tightening the fixing bolt 5 and nut 6, and the flat connecting part of the connecting fitting 2 via the washers 3, 3. Since it is set by the pressure contact force acting on 2a, the fixing bolt 5 and nut 6
The support holder members 8, 9 will not be deformed by the tightening force caused by the deformation, and the rotation torque will not become unstable due to the deformation.
Problems such as cracking and damage are eliminated, and appropriate and stable rotational torque can be easily obtained.

Moreover, since the support holder members 8 and 9 do not require great strength, they can be manufactured from inexpensive synthetic resin.

Furthermore, since the clamping fittings 4, the heads 5a of the fixing bolts 5, the nuts 6, etc. are not exposed to the outside of the support holder members 8, 9, the appearance is improved, and the heads 5a, nuts 6, etc. of the fixing bolts 5 are not exposed. are fitted into the blind holes 8a, 9a of the support holder members 8, 9 and do not wobble.
The positioning and holding of the support holder member is ensured.

Further, in the illustrated embodiment, the feeder 14 is operated by the engagement of the punched hole 14a thereof with the protrusion 8b of the support holder member 8, and the pressing operation of the support holder member 8 against the seat 8c by the protrusion 4d of the clamping fitting 4. Since the antenna element 1 is reliably positioned and held between the support holder members 8 and 9 by the above, the connection between the feeder 14 and the antenna element 1 via the clamping fitting 4 or the like can be stabilized.

In implementing the present invention, the support holder member is not limited to being divided into two parts, and the present invention is not limited to a twin-pole antenna device, but may be applied to an appropriate antenna device that raises and lowers the antenna element. Needless to say, it is widely applicable.

[Effect of idea]

As explained above, according to the antenna device according to the present invention, the tightening force of the fixing bolt and nut for tiltably supporting the connecting fitting of the antenna element is applied to the support holder member made of synthetic resin. Since the structure is such that the clamping force is obtained through the metal clamping fittings placed oppositely between the support holder members, even if the clamping force of the fixing bolts and nuts is increased, the synthetic resin The support holder member is not adversely affected, and the above-mentioned tightening force can be appropriately adjusted to set the tilt holding force of the antenna element as desired.

Further, even if the support holder is made of an inexpensive synthetic resin molded product, it will not suffer from damage such as deformation or cracking as in the conventional case, so manufacturing costs can be reduced by molding it with inexpensive materials.

Furthermore, the clamping fittings that support the connecting fittings of the antenna element with their bending axis, the heads of the fixing bolts, nuts, etc. are housed between the opposing support holder members and are not exposed to the outside, resulting in a better appearance in terms of design. Since the head of the fixing bolt, nut, etc. are fitted into the blind hole etc. provided on the opposing surface of the support holder member, there is no backlash, and effects such as positioning and holding can be obtained reliably.

[Brief explanation of the drawing]

Figure 1 is a plan view showing one embodiment of the present invention;
3 is a sectional view taken along the - line in FIG. 2, and FIG. 4 is an exploded explanatory view of the main parts. 1... Antenna element, 2... Connection fitting, 2a...
... Flat connecting part, 3 ... Washer, 4 ... Clamping fitting, 5 ... Fixing bolt, 6 ... Nut, 8, 9 ...
...Support holder member, 11...Tapping screw,
12...Spring pin, 14...Feeder, 1
5... Lug terminal, 16... Base.

Claims (1)

[Claims for Utility Model Registration] A fixing bolt that is inserted between the flat connecting part of the connecting fitting connected to the base end of the antenna element, sandwiched between metal press-contacting members arranged oppositely on both sides. , a clamping bracket that pivotally supports the flat connecting part of the antenna connection bracket so as to be tiltable with a required rotational torque by tightening a nut, and the clamping bracket is supported by a pair of mating members made of synthetic resin. 1. An antenna device characterized in that the clamping fittings, the head of a fixing bolt, a nut, etc. are housed in a position between holder members, and are internalized within the support holder member by coupling the support holder member.