JPH04112509U - Antenna rotation limit mechanism - Google Patents

Abstract

(57) [Summary] [Purpose] To enable the limit position to be set accurately and easily without rotating the antenna. [Structure] An arm 6 is connected to the rotating shaft 1 of the antenna, and a unitized cam switch device 7 having a cam 8 that engages with and slides on the arm 6 is arranged on the fixed side opposite to the arm 6. It is something.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

This idea is useful for antenna equipment that rotates around high angles and azimuths. The present invention relates to a limit mechanism for limiting the rotation angle range of the rotation angle.

0002

[Conventional technology]

FIG. 4 is an external view of the antenna, and in the figure, 1 is the rotation axis of the antenna. Figures 5 and 6 show conventional limit mechanisms of this type, and 2 is attached to the rotating shaft 1. 3 is a cam attached to the disk; 4 is attached to the fixed side 5; This is a switch that is turned ON and OFF when connected to and separated from the system 3.

0003 Next, the operation will be explained. As the rotating shaft 1 rotates, this rotating shaft 1 The attached disc 2 and the cam 3 attached to it rotate and are attached to the fixed side 5. The limit position is detected when the switch 4 is hit, and a signal is sent to the drive mechanism (not shown). Rotation is stopped by sending a signal.

0004

[Problem that the idea aims to solve]

The conventional limit mechanism is configured as described above, so the rotation angle range can be set. The antenna must be rotated to do this. However, this rotation angle range limit There are problems such as it is dangerous to set the limit mechanism used for the antenna by rotating the antenna. was there.

[0005] This idea was made to solve the above problems, and the antenna The purpose is to obtain a limit mechanism that can set the limit position without rotating. Ru.

[0006]

[Means to solve the problem]

The limit mechanism according to this invention is provided with an arm that rotates around the rotation axis of the antenna. The fixed side part facing the arm is made into a unit that operates according to the rotation angle of the arm. It is equipped with a cam switch device.

[0007]

[Effect]

In the limit mechanism in this invention, the limit is set by the direct distance dimension, Limits can be set without rotating the antenna.

[0008]

【Example】

An embodiment of this invention will be described below with reference to the drawings. In Figure 1, 1 is rotation The shaft 6 is an arm attached to this rotating shaft 1. 7 is the fixed side facing this arm 6 8 is a cam that slides into contact with the arm 6, and 9 is a switch device placed on this cam. A switch is turned on and off by cam 8, 10 is a spring attached to the tip of cam 8, 11 1 is an outer cylinder for guiding the cam 8, and 12 is a spring rest for the spring 10.

[0009] Next, the operation will be explained. The antenna moves from the side to the zenith as shown in Figure 4. Rotate. In FIG. 1, when the antenna rotates, the rotation axis 1 rotates, As the arm 6 rotates accordingly, it hits the tip of the cam 8 of the switch device 7. and slide inside the outer cylinder 11. A spring 10 is provided on the opposite side of the cam 8. When the arm 6 does not hit the cam 8, the cam 8 and the switch 9 are separated, but When the cam 8 slides against the spring 10 and hits the switch 4, the limit position is reached. detects the position and stops rotation. Note that this switch device 7 is assembled as one unit. Therefore, the cam 8 and switch 9 can be set in advance.

0010 Next, Figures 2 and 3 show other embodiments of this invention, in which rotation is converted into linear motion. In the figure, 1 is the rotating shaft, and 6 is the limit mechanism attached to the rotating shaft. An arm, 13 is a slide plate connected to the arm 6 with a pin 14, 15 is this slide plate 13 The cam 16 is a guide that slidably fits the slide plate 13. 17 is a switch attached to the guide plate 16, and 18 is a switch attached to the guide plate 16. This is a fixed pin attached to the end.

[0011] Next, the operation will be explained. As the antenna rotates, the rotation axis 1 and the arm 6 rotates, and as the arm 6 rotates, the slide plate 13 connected with the pin 14 moves. This slide slides within the guide plate 16 connected by the pin 18 on the fixed side. The switch 17 attached to the guide plate 16 and the slide 13 are attached by the The distance between the cams 15 expanded and contracted. And the distance between cam 15 and switch 17 When it is contracted and touching, the switch operates and stops the drive.

0012

[Effect of the idea]

As described above, according to this invention, the rotational movement of the rotation axis of the antenna can be controlled by the linear movement of the cam. Since it is converted to motion, you can set the limit by adjusting the distance. It is easy to use, and since it is unitized, you can easily switch the antenna without rotating it. It has excellent effects such as easy switch settings.

[Brief explanation of drawings]

FIG. 1 is a plan view showing a limit mechanism according to an embodiment of the invention.

FIG. 2 is a plan view showing another embodiment of the invention.

FIG. 3 is a side view of FIG. 2;

FIG. 4 is an external view of the antenna.

FIG. 5 is a plan view showing a conventional limit mechanism.

FIG. 6 is a front view of FIG. 5;

[Explanation of symbols]

1 Rotating axis 6 arms 7 Switch device 8 Cam 9 switch 10 spring 11 Outer tube 13 Slide plate 14 pin 15 cam 16 Guide plate 17 Switch 18 pin

Claims (2)

[Scope of utility model registration request] Claim 1: In a rotation angle limiting mechanism for an antenna device that rotates around an altitude angle and an azimuth angle, an arm that rotates together with the rotation axis of the antenna is attached, and a switch device that is unitized on a fixed side portion opposite to this arm. This switch device includes a cam that slides inside the outer cylinder and has a cam shape at one end, a switch that turns on and off when the cam engages with the arm and slides, and an antenna rotation limit mechanism comprising a spring that engages a cam; [Claim 2] A rotating arm attached to a rotating shaft, a sliding plate connected to the tip of this arm with a pin and having a cam attached to a part, and this sliding plate slidably fitted, and the fixed side A rotation limit mechanism for an antenna, which is attached to the cam with a pin and includes a guide plate having a switch that connects and separates from the cam.