JPH0115215Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to the structure of the attachment part of the adjustment mirror used for adjusting the radio wave reflection plate in the waveguide of an antenna device, and specifically, the invention relates to a structure for attaching the adjustment mirror directly to the adjustment reference plane. The present invention relates to an adjustment mirror mounting structure configured to maintain the positional accuracy of the adjustment mirror and the radio wave reflecting plate and the flatness of the reflection surface of the adjustment mirror.

The adjustment mirror used to adjust the radio wave reflector in the antenna waveguide performs all the position and tilt adjustments of the radio wave reflector in a very small area, so the accuracy and adjustment of the mounting position of the adjustment mirror and the radio wave reflector are very important. High precision is required for the flatness of the reflective surface of the mirror. The adjustment mirror must be mounted accurately so as to match the adjustment reference plane, and the surface precision of its reflecting surface must not be disturbed by distortion that occurs in the adjustment mirror when it is fixed.

As shown in the partial plan view of FIG. 1 and the cross-sectional view of FIG. A mounting seat 1b having the same depth as the dimensions is bored, the adjustment mirror 3 is supported by this mounting seat 1b, a mirror holding fitting 2 is attached to the upper surface 1a of the mirror holder 1 with a mounting bolt 4, and the holding fitting is It had a structure in which the adjustment mirror 3 was pressed against it. In such a device, it is necessary to align the reflective surface 3a of the adjustment mirror 3 with the adjustment reference surface position A, which makes it difficult to manufacture the mirror holder 1, especially to obtain the precision of the mounting seat 1b and adjust the mirror assembly. It becomes expensive. In addition, as mentioned above, since the adjustment mirror 3 is fixed to the holder 1 by pressing the mirror holding bracket 2, the pressing force causes distortion in the adjustment mirror reflection surface 3a, which deteriorates the flatness of the reflection surface of the mirror. There were flaws.

The present invention allows the adjustment mirror to be attached to the radio wave reflecting plate by bringing the reflective surface of the adjustment mirror into direct contact with the adjustment reference surface and holding the adjustment mirror against the adjustment reference surface with a mounting bolt through a washer made of soft cushion material. It is an object of the present invention to provide an adjustment mirror mounting structure for an antenna device that has good positional accuracy, does not cause distortion on the reflection surface of the adjustment mirror, and is easy to install.

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

FIG. 3 is a partial plan view of an adjustment mirror mounting portion according to an embodiment of the present invention, and FIG. 4 is a longitudinal cross-sectional view thereof, which correspond to FIGS. 1 and 2, respectively. The upper surface 1a of the mirror holder 1 defines an adjustment reference plane position A as in the conventional case, and an inner flange 7 is attached to this upper surface 1a by mounting bolts 4. The inner periphery of the inner flange 7 has a smaller diameter than the inner periphery of the mirror holder 1, and protrudes inward on the same plane as the upper surface 1a of the mirror holder 1. Therefore, in the present invention, the adjustment reference plane has a structure extending toward the inner diameter side of the mirror holder 1. Attach the adjustment mirror 3 to the surface (back surface) that defines the adjustment reference surface of the inner flange 7 in the inner diameter part of the mirror holder 1 so that its reflective surface 3a is in contact with the surface of the inner flange 7, and attach it with the mounting bolts 6. Attach. For this purpose, the inner flange 7 is formed with a screw hole 7a into which the mounting bolt 6 is screwed. Further, a soft cushion material 5 is inserted between the head of the mounting bolt 6 and the adjustment mirror 3. By attaching the reflecting surface 3a of the adjusting mirror 3 directly to the adjusting reference surface in this way, the attachment precision between the radio wave reflecting plate and the adjusting mirror 3 is increased, and the adjusting mirror mounting seat can be drilled into the mirror holder as in the conventional case. Since this is not necessary, the production of the mirror holder 1 becomes inexpensive, and there is no need for complicated adjustment of the dimensions of the mounting seat during production. Furthermore, in the present invention, since the adjustment mirror 3 is attached via the soft cushion material 5, the adjustment mirror reflection surface 3
Effects such as no distortion occurring in a and no damage to the flatness of the reflecting surface are achieved.

[Brief explanation of the drawing]

Fig. 1 is a partial plan view showing the adjustment mirror mounting part of a conventional antenna device, Fig. 2 is a longitudinal sectional view of the mounting part shown in Fig. 1, and Fig. 3 is an adjustment according to an embodiment of the present invention. FIG. 4 is a partial plan view of the mirror mounting portion, and FIG. 4 is a longitudinal sectional view of the adjustable mirror mounting portion according to the present invention. 1...Mirror holder, 1a...Top surface of mirror holder, 3...Adjustment mirror, 4, 6...Mounting bolt,
5...Cushion material, 7...Inner flange, A...
Adjustment reference plane position.

Claims (1)

[Scope of utility model registration request] In the mounting structure of an adjustment mirror used for adjusting a radio wave reflecting plate in an antenna device waveguide, an inner flange is attached on the surface of the mirror holder that defines the adjustment reference surface and extends inwardly on the same surface as the surface, An adjustment mirror mounting structure characterized in that the adjustment mirror is directly mounted on an adjustment reference plane defined by the inner flange.