JPH0644169Y2 - Planar antenna - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a planar antenna in which the elevation angle of a planar antenna body is adjustable.

[Prior Art] Conventionally, a planar antenna of this type in which the elevation angle of the planar antenna body is freely adjustable is, as shown in FIG. 11, a pair of leg pieces 4a of a U-shaped holding portion 4 provided at the upper end of a column 3. The tip end is pivotally attached to the upper part of both side surfaces of the converter box 2 protruding from the back surface of the planar antenna body 1, and one end of the adjusting arm 5 pivotally attached to the lower part of both side surfaces of the converter box 2 is adjusted in length. In some cases, the elevation angle θ of the planar antenna body 1 is adjusted by freely fixing it to the leg piece 4a and adjusting the length of the adjusting arm 5.

[Problems to be Solved by the Invention] However, in the above-mentioned conventional example, the adjustment arm 5
Since there is a protrusion, there is a problem that the appearance of the flat antenna when viewed from below becomes poor. In particular, when the amount of protrusion of the converter box 2 is reduced, the adjusting arm 5 of the elevation angle adjusting mechanism, which is designed in a functional manner, largely protrudes and stands out, which is a design problem.

The present invention has been made in view of the above points, and an object of the present invention is that, even when the amount of protrusion of the converter box is reduced, the adjustment arm does not largely project and is not conspicuous, and the appearance is good. It is to provide a planar antenna.

[Means for Solving the Problems] The planar antenna of the present invention includes a planar antenna main body in which a box-shaped converter box is projectingly provided in the center of the rear surface and a U-shaped configuration in which both legs are bent in a V shape on the rear surface side. A column having a holding portion and the ends of both leg pieces of the U-shaped holding portion pivotally attached to the upper portions of both side surfaces of the converter box, and one end pivotally attached to the lower portions of both side surfaces of the converter box and the other end portions of both legs. It is composed of an adjustment arm that is fixed between the bent part of the piece and the tip so that the length can be adjusted.By adjusting the length of the adjustment arm, the elevation angle of the planar antenna body can be adjusted and the bending angle of both leg pieces can be adjusted. It is set to be substantially the same as the minimum angle of the elevation angle adjustment range.

[Operation] The present invention is configured as described above, and both leg pieces are bent in a dogleg shape on the back side at the upper portions of both sides of the box-shaped converter box projecting at the center of the back side of the planar antenna body. Adjustment in which one end is pivotally attached to the lower ends of both sides of the converter box and the other end is fixed between the bent portion and the tip of both leg pieces so that the length can be adjusted freely. Since the arm is provided and the elevation angle of the planar antenna body can be adjusted by adjusting the length of the adjustment arm, and the bending angle of both legs is set to be almost the same as the minimum angle of the elevation angle adjustment range, the amount of protrusion of the converter box is reduced. Even if
It is possible to provide a flat antenna that does not stand out because the adjusting arm largely protrudes and has a good appearance.

[Embodiment] FIG. 1 to FIG. 9 show an embodiment of the present invention, in which a planar antenna body 1 having a box-shaped converter box 2 projecting from the center of the rear face and both leg pieces 4a are disposed on the rear face side. Both leg pieces of the U-shaped holding portion 4 having the U-shaped holding portion 4 bent in a U shape
The end of 4a is pivotally attached to the upper part of both sides of the converter box 2, and one end is pivotally attached to the lower part of both sides of the converter box 2 and the other end is between the bent part and the end of both leg pieces 4a. And an adjusting arm 5 which is fixed so that its length can be adjusted freely. By adjusting the length of the adjusting arm 5, the elevation angle θ of the planar antenna body 1 can be adjusted and the bending angle of both leg pieces 4a can be adjusted in the elevation angle adjusting range. It is set to be substantially the same as the minimum angle (28 ° in the embodiment).

FIG. 4 and FIG. 5 show specific examples of the pivotally connecting portions of both leg pieces 4a of the U-shaped holding portion 4, with a notch 10 at the tip of the leg piece 4a.
A shaft hole 10 having a is formed, and a pivot shaft 11 that is inserted into the shaft hole 10 through a notch 10a is provided so as to project from the side surface of the converter box 2. The shaft shaft 11 is inserted into the shaft hole 10. By doing so, the leg piece 4a is pivotally attached to the side surface of the converter box 2 in a freely rotatable manner. Note that the opening on the outer surface of the shaft hole 10 is a thin-walled portion.
It is closed by 10b, and the shaft hole 10 and the pivot shaft 11 are visible in appearance.
Is not visible.

FIG. 6 shows a specific example of the pivotally-attached portion at one end of the adjusting arm 5. The shaft hole is formed in the side wall 2a of the converter box 2.
The shaft pin 16 is inserted into the shaft hole 15b formed at one end of the adjusting arm 5a and the adjusting arm 5, and the E-ring 17 for retaining is attached to the tip of the shaft pin 16 to attach the adjusting arm 5 to the side surface of the converter box 2. One end of the is pivotally attached.

7 and 8 show a specific example of a fixing means for fixing the other end of the adjusting arm 5 to the leg piece 4a so that the length of the adjusting arm 5 can be adjusted freely. A long hole formed at the other end of the adjusting arm 5 is shown in FIGS. 20 and leg pieces
A hexagonal bolt 22 is inserted into a bolt insertion hole 21 formed in 4a, and a lever 24 is fitted to a nut 23 having a knurled screwed to the hexagonal bolt 22. It should be noted that the long hole 20 is formed with a rotation preventing concave step portion 20a that engages with the hexagonal screw head of the hexagonal bolt 22, and the hexagonal bolt 22 of the hexagonal bolt 22 when the nut 23 is tightened by operating the lever 24 is formed. It is designed to prevent rotation.

Here, by operating the lever 24 to the front, the nut 23
Is loosened so that the length of the adjusting arm 5 can be adjusted within the range of the long hole 20, and the nut 23 is tightened by operating the lever 24 in the direction of the plane antenna body 1 to adjust the length of the adjusting arm 5. Edge fixing is performed. Further, the lever 24 formed in a dogleg shape is parallel to the leg piece 4a with the adjustment arm 5 fixed by tightening the nut 23,
The lever 24 is made inconspicuous. That is, while tightening the nut 23, attach the lever 24 to the nut 23 and the leg piece 4a.
It is fitted in parallel with. However, it is necessary to use a forward screw as the hexagonal bolt 22 for fixing the left adjusting arm 5 and a reverse screw as the hexagonal bolt 22 for fixing the right adjusting arm 5.

In the above embodiment, the adjustment arm 5 is fixed by tightening the nut 23 with the lever 24.
As shown in, the fixing screw 26 may be inserted from the outside into the bolt insertion hole 21 and the long hole 20, and the fixing screw 26 may be tightened to a screwdriver to fix the adjustment arm 5.
As shown in FIG. 10 (b), the other end of the adjusting arm 5 may be fixed with a thumbscrew 26 '. Needless to say, a nut (not shown) screwed to the fixing screw 26 and the thumb screw 26 'is engaged with the rotation stopping concave step portion 20a.

Now, according to the present invention, both leg pieces 4a of the U-shaped holding portion 4 which is bent in a V shape on the back side are provided on the upper portions of both sides of the converter box 2 projecting on the back side of the planar antenna body 1. An adjusting arm 5 is provided, which is pivotally attached at its tip and one end of which is pivotally attached to the lower portion of both side surfaces of the converter box 2 and the other end of which is fixed between the bent portion of both leg pieces 4a and the tip so as to be adjustable in length. As shown in FIG. 10, by adjusting the length of the adjusting arm 5 by operating the lever, the elevation angle of the planar antenna main body 1 can be freely adjusted within the range of 28 ° to 54 °. Here, since the bending angle of both leg pieces 4a is set to be substantially the same as the minimum angle (28 ° in the embodiment) of the elevation angle adjustment range, even when the amount of protrusion of the converter box 2 is reduced, the adjustment arm It is possible to provide a planar antenna that does not stand out because of the large protrusion 5 and has a good appearance. That is,
As shown in FIG. 10 (a), when the elevation angle θ is set to 28 °, the adjustment arm 5 becomes almost invisible, while as shown in FIG. 10 (b), the elevation angle θ is Even if it is set to 54 °, the adjustment arm 5 only slightly projects and the appearance is good. As described above, in the present invention, the design of the elevation angle adjusting mechanism of the planar antenna, which has been conventionally designed to be functional, is made clean to improve the appearance. If the elevation angle θ can be adjusted by operating the lever 24, the elevation angle can be easily adjusted.

[Advantage of the Invention] The present invention is configured as described above, and both leg pieces are formed in a dogleg shape on the rear side on the upper side of both sides of the box-shaped converter box protruding in the center of the rear side of the planar antenna body. One end of the bent U-shaped holding part is pivotally attached, one end is pivotally attached to the lower part of both side surfaces of the converter box, and the other end is fixed between the bent part and the end of both leg pieces so that the length can be adjusted. Since the adjustment angle of the converter arm is provided and the elevation angle of the planar antenna body can be adjusted by adjusting the length of the adjustment arm, and the bending angle of both legs is set to be approximately the same as the minimum angle of the elevation angle adjustment range, the amount of protrusion of the converter box Even if you reduce
There is an effect that it is possible to provide a planar antenna that does not stand out because the adjustment arm largely protrudes and has a good appearance.

[Brief description of drawings]

FIG. 1 is a perspective view of an embodiment of the present invention, FIG. 2 is a rear view of the same, FIG. 3 is a side view of the same, FIG. 4 (a) is a front view of essential parts of the same, and FIG. ) Is a side view of an essential part of the above, FIG. 5A is a sectional view of an essential part of the same, FIG. 5B is a sectional view of an essential part of the same, and FIG. FIG. 6 is a sectional view of relevant parts of the above, FIG. 7 is a sectional view of relevant parts of the same, FIG. 8 is an exploded perspective view of relevant parts of the same, and FIGS. 10 (a) and 10 (b) are front views of main parts of another embodiment, and FIG. 11 is a side view of a conventional example. 1 is a plane antenna main body, 2 is a converter box, 3 is a column, 4 is a U-shaped holding portion, 4a is a leg piece, and 5 is an adjusting arm.

Claims (1)

[Scope of utility model registration request] 1. A planar antenna body having a box-shaped converter box projecting from a central portion of a rear surface thereof, and U-shaped holding portions in which both leg pieces are bent in a V shape toward the rear surface. The ends of both legs are pivotally attached to the upper part of both sides of the converter box, and one end is pivotally attached to the lower part of both sides of the converter box, and the other end is long between the bent part and the tip of both legs. It is composed of an adjustment arm that is fixed so that it can be adjusted freely, and the elevation angle of the planar antenna body can be adjusted by adjusting the length of the adjustment arm, and the bending angle of both legs is set to be approximately the same as the minimum angle of the elevation angle adjustment range. A planar antenna characterized by the above.