JPH0344682B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention is mainly used for wireless communications using microwave or higher frequency bands.
The present invention relates to a storage mechanism for a parabolic antenna reflector, and particularly to an antenna device that is effective when mounted on a vehicle and has height restrictions.

[Conventional technology]

In an antenna device that is used by moving the installation position, if the antenna has a shape that requires a reduction in the space in which the reflector is installed, a mechanism that can easily accommodate the reflector is required.

Conventionally, this type of storage mechanism consists of a method in which the reflective mirror surface of the parabolic antenna is divided into divided mirror surfaces radially from the center, and each mirror surface is disassembled and stored individually, or the mirror surface is divided vertically into three. The storage mechanism has been to remove and store the two equal divided mirror surfaces on both sides while leaving the center as is, or to fold and store the two equal divided mirror surfaces on both sides toward the center.

[Problem that the invention seeks to solve]

However, in the conventional storage mechanism as described above, the reflective mirror surface is disassembled or folded in each case, so the dividing part is very complicated in order to maintain the mirror surface precision, which is the most important electrical aspect, and it is expensive and heavy. In addition, there are drawbacks such as an increase in the time required for storage and assembly work, and furthermore, when used as an antenna for an in-vehicle mobile communication system, transportation is inconvenient and installation time is shortened. It had some drawbacks, such as being long.

The antenna device according to the present invention solves the drawbacks of conventional storage mechanisms, and aims to provide an antenna device equipped with a mechanism that can reduce the spatial volume of the antenna and store it without disassembling the reflecting mirror surface. .

[Means for solving problems]

The present invention provides an antenna device including a reflector, a support structure for the reflector, and a pedestal to which the support structure is attached, wherein the support structure rotates around a horizontal axis approximately at the center of the side of the reflector. a first supporting means for freely supporting the frame; and rotating the reflecting mirror about the horizontal axis so that the reflecting surface of the reflecting mirror faces downward, and the horizontal axis faces above a substantially central portion of the pedestal. The present invention is characterized by comprising second support means for fixing the reflecting mirror to the pedestal.

The first support means includes a first member whose end portions are rotatably attached to the horizontal shaft and the pedestal, respectively, and a telescopic second member which connects the middle of the first member to the pedestal. The second support means includes a third member that connects the end of the reflector and the pedestal, and this third member connects the pedestal and the pedestal when the reflector is in use. It is preferable that the structure is such that the back surfaces can be connected.

Alternatively, the first support means includes a first member whose end portions are rotatably attached to the horizontal shaft and the pedestal, respectively, and the second support means includes an end portion of the reflector and a first member rotatably attached to the horizontal shaft and the pedestal, respectively. It is preferable to include a first link member that connects the middle and a second link member that connects the middle and the frame.

[Effect]

By rotating the support mechanism without disassembling the reflector and by tilting the reflector substantially horizontally with its reflective surface facing downward, the spatial volume of the antenna reflector is significantly reduced.

Since a part of the support mechanism is provided with means for fixing the reflecting mirror to the pedestal in the stored position, the antenna can be easily moved in the stored state.

〔Example〕

Next, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 shows a side view of an offset antenna according to a first embodiment of the present invention when it is deployed, and FIG. 2 shows a front view thereof. The offset reflecting mirror 1 is supported by a support mechanism 2, which is a first member, and a support mechanism 3, which is a second member. Further, a support column 4, which is a third member, supports the offset reflecting mirror 1 from the back side. These support mechanisms and support columns are mounted on the pedestal 6 while maintaining their respective positional relationships with the primary radiator 5. An antenna direction adjustment mechanism is provided below the pedestal 6, and reference numeral 7 indicates an elevation angle adjustment mechanism, and 8 indicates a horizontal direction adjustment mechanism.

The feature of the present invention is that the support mechanism 2 supports the offset reflector 1 at its upper end so as to be rotatable around a horizontal axis, and when the offset reflector 1 is stored, the support mechanisms 2 and 3 are Frame 6
The supporting mechanism 3 is extended, and the offset reflector 1 is placed at the center above the pedestal 6 with its reflective surface facing downward, almost parallel to the surface of the pedestal 6. Furthermore, the back surface of the offset reflector 1 is connected and fixed to the pedestal 6 by the support column 4.

That is, FIG. 3 shows a side view of the offset antenna of the first embodiment in the stored state, and FIG. 4 shows a front view of the same. In FIG. 3, the upper end of the support column 4 is removed from the connection a on the back surface of the offset reflector 1, and the support mechanisms 2 and 3 are tilted toward the primary radiator 5. In this case, the support mechanism 3 is the lock mechanism b
It is stretched by removing the . By limiting the extended length, the angle of inclination of the support mechanism 2 can be regulated.

Next, the antenna reflector 1 is rotated until the opening surface is almost parallel to the mount 6, and the upper end of the support column 4 is attached to a support point C provided at the lower part of the back surface of the offset reflector 1.

As a result, all the storage operations are completed, and the storage state of the offset reflector with a reduced volume can be realized as shown in FIGS. 3 and 4.

FIG. 5 shows a side view of the offset antenna according to the second embodiment of the present invention when it is deployed, and FIG. 6 similarly shows a front view.

In the second embodiment, the first member is a support mechanism 2' having a triangular side surface, the upper end of which supports the offset reflector 1 rotatably around a horizontal axis, and the lower end of the triangular base. Frame 6 with fulcrum g at one end
A rod 4a' is a first link member which is rotatably attached to the frame 6, and which is a first link member that connects the end of the offset reflector 1 and the middle part h of the support mechanism 2'. It includes a rod 4b' which is a link member.

That is, in the second embodiment, the offset reflecting mirror 1
is supported by a support mechanism 2'. The support mechanism 2' can rotate about a fulcrum g, and the support part f is fixed to the pedestal 6 by a lock mechanism d. The offset reflecting mirror 1 is fixed so as not to rotate by supporting the lower part of the reflecting mirror surface by a rod 4a'.

FIG. 7 shows a side view of the antenna of the second embodiment in a stored state, and FIG. 8 similarly shows a front view. In FIG. 8, the lock mechanism d is removed and the support mechanism 2' is tilted toward the primary radiator 5. At this time, the angle of inclination is regulated by the rod 4b', and the support mechanism 2' is supported and maintained in a stable state. Further, the offset reflecting mirror 1 is rotated by unlocking the bent portion e of the rod 4a'. At this time, as shown in FIG. 8, the opening surface of the offset reflector 1 is locked in a state in which the rod 4a' is extended to the maximum so that the rod 4a' is kept substantially parallel to the pedestal 6, as shown in FIG. The rod 4a' acts to regulate the rotation of the mirror 1 and at the same time to stably support the offset reflecting mirror 1.

As a result of the above, as shown in FIGS. 7 and 8, it is possible to achieve a stable storage state in which the height of the antenna reflector is low and the space volume is reduced.

As is clear from the description of the above embodiments, the parallelism between the aperture surface of the offset reflector 1 and the pedestal 6 and the inclination angle of the support mechanism 2 or 2' during storage are not defined to specific values; An appropriate value may be selected to reduce the spatial volume and height of the antenna. Furthermore, although the above embodiments have been described as offset antennas, the storage mechanism of the present invention can be applied to any type of antenna reflector.

〔Effect of the invention〕

As explained above, by using the antenna storage mechanism of the present invention, it is possible to store an antenna with a reduced space volume, so that height restrictions can be sufficiently suppressed even when mounted on a vehicle. Since the wind pressure coefficient of the reflective mirror surface can also be reduced, it has the effect of improving wind speed resistance when stored. These effects reduce the basic load of the installation, which reduces installation costs, reduces restrictions on installation locations, and allows installation and removal of the antenna in small vehicles. It has the advantage that work can be done extremely easily and quickly.

[Brief explanation of drawings]

FIG. 1 is a side view of the first embodiment of the present invention when it is developed. FIG. 2 is a front view of the first embodiment of the present invention when it is developed. FIG. 3 is a side view of the first embodiment of the present invention when it is stored. FIG. 4 is a front view of the first embodiment of the present invention when it is stored. FIG. 5 is a side view of the second embodiment of the present invention when it is developed. FIG. 6 is a front view of the second embodiment of the present invention when it is developed. FIG. 7 is a side view of the second embodiment of the present invention when it is stored.
FIG. 8 is a front view of the second embodiment of the present invention when stored. 1...Offset reflector, 2, 2', 3...Support mechanism, 4...Support column, 4a', 4b'...Rod,
5... Primary radiator, 6... Frame, 7... Elevation angle adjustment mechanism, 8... Horizontal direction adjustment mechanism, a... Connection section, b, d... Lock mechanism, c, f... Support section,
e...Bending part, g...Fully point, h...Middle part.

Claims (1)

[Claims] 1. An antenna device including a reflector, a support structure for the reflector, and a pedestal to which the support structure is attached, wherein the support structure has a horizontal axis centered approximately at the center of the side of the reflector. a first support means rotatably supporting the mirror; and a first support means rotatably supporting the reflector around the horizontal axis;
and second support means for fixing the reflecting mirror to the pedestal so that the horizontal axis faces above a substantially central portion of the pedestal with the reflecting surface of the reflecting mirror facing downward. Characteristic antenna device. 2. The first support means includes a first member whose ends are rotatably attached to the horizontal shaft and the pedestal, respectively, and a second telescopic member that connects the middle of the first member to the pedestal. The second support means includes a third member that connects the end of the reflector and the pedestal, and when the reflector is in use, the third member connects the pedestal and the reflector. The antenna device according to claim 1, which has a structure in which the back surfaces of the antenna device can be connected to each other. 3. The first support means includes a first member whose ends are rotatably attached to a horizontal shaft and a pedestal, respectively; The antenna device according to claim 1, further comprising: a first link member that connects the two link members; and a second link member that connects the intermediate portion of the link member to the frame.