JPS6036884Y2 - Rod antenna locking device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a rod antenna locking device for locking a rod antenna provided in a portable radio or the like in a guide pipe.

Generally, portable radios are equipped with rod antennas, and this type of rod antenna is stored in a guide pipe so that it can be pulled out. I try to pull it out and stretch it out.

Then, the rod is connected to the base metal fitting via the base metal fitting,
When changing the direction of the antenna, pull the rod out of the guide pipe as much as possible so that the pivot point between the base metal fitting and the base metal fitting protrudes outside the guide pipe, then bend the rod around this pivot point and attach it to the base. The metal fittings were made to rotate around their axis.

Such a rod antenna is provided with a locking device for locking the rod inside the guide pipe via the base metal fitting and the base metal fitting. It consists of a leaf spring interposed between.

This leaf spring slides on the inner surface of the guide pipe when the rod is pulled out or pushed into the guide pipe, but it also slides on the inner surface of the guide pipe when the rod is pulled out to its maximum extent and the antenna is locked in the desired orientation. Since the base metal fitting is locked with the same pressing force as when pushing in the drawer, when the spring force of the leaf spring is weak, the direction of the antenna changes with a slight external force, and conversely, the spring force of the leaf spring is If the rod is made stronger, the direction of the antenna can be fixed at a desired position, but it has the drawback that a strong force must be applied when pushing in and pulling out the rod.

In view of these points, the present invention is capable of securely locking the antenna in a desired direction to prevent the antenna from rotating uncontrollably when the rod is pulled out from the guide pipe to the maximum extent, and when expanding and contracting, the rod can be easily moved with a weak force. An object of the present invention is to provide a locking device for a rod antenna that can be pushed in and pulled out.

Embodiments of the present invention will be described below with reference to the drawings.

1 and 2, a base metal fitting 2 is slidably housed in a guide pipe 1 which is inserted and fixed into a casing of a portable radio, and a base metal fitting 3 is attached to this base metal fitting 2. An antenna rod 4 is connected through the antenna.

The rear part of the base metal fitting 2 is provided with an enlarged part 2a that is enlarged in the direction in which the diameter button is pressed.
A tapered surface 2b is formed on the outer peripheral surface of a.

A screw hole 2c is bored in the center of the enlarged portion 2a, a screw 5 is screwed into the screw hole 2c, and a split groove 2d is formed in the radial direction from the screw hole 2c.

Further, a stepped portion 2e is formed at the front end of the enlarged portion 2a, and adjacent to this stepped portion 2e, two leaf springs 6, 6 are attached to the base metal body 2.
It is provided along the outer circumferential surface so as to sandwich f.

The front part of the leaf spring 6 is provided with a swollen portion 6a that is shaped like a bulge, and when this swollen portion 6a comes into contact with the inner surface of the guide pipe 1, the base metal fitting 2 is inserted into the guide pipe. Elastically locked.

Furthermore, a small protrusion 6b is formed by stamping on the inner side of the rear end of the leaf spring 2, and this small protrusion 6b has a shape as shown in FIG.
When the rod 4 is pulled out and pushed in (sliding), it fits into the recess 2g adjacent to the stepped portion 2e of the enlarged portion 2b of the base metal fitting.

A split groove 7 is formed in the front part of the base metal fitting 2, and a flat plate part 3a of the base metal fitting 3 is inserted into the split groove 7, and this flat plate part 3a is pivoted in the split groove 7 by a pin 8. has been done.

Next, the effect will be explained.

FIG. 1 shows the rod 4 at an intermediate position of the guide pipe 1, and when the rod 4 is further pulled out from this position, the base metal fitting 2 is also pulled out together with the rod.

At this time, the leaf spring 6 is also pulled out together with the base metal fitting 6 because its rear end is locked to the stepped portion 2e of the enlarged portion and its small protrusion 6b is fitted into the recess 2g.

When the leaf spring 6 is pulled out together with the base metal fitting 6, its bulging portion 6a slides on the inner surface of the guide pipe 1, the front part of the base metal fitting 2 protrudes outside the guide pipe 1, and the front end of the leaf spring 6 When it comes into contact with the retaining part 1a of the guide pipe 1 (Fig. 3)
, the next moment the leaf spring 6 is pushed backwards and its small protrusion 6
b is removed from the concave portion 2g, and its rear end moves over the step portion 2e of the enlarged portion and onto the tapered surface 2b.

When the rod 4 is further pulled out to the maximum extent as shown in FIG. 4 from the state shown in FIG. Lock it firmly.

At this time, the small protrusion 6b of the leaf spring 6 slides in the split groove 2d of the enlarged portion and comes into contact with the inner surface of the head of the screw 5 and is locked therein.

In the embodiment, a stepped portion 2e is provided continuous to the straight base metal body 2f to form a large diameter portion 2a having a tapered surface 2b, but the inner surface of the guide pipe 1 and the plate spring 6 during sliding When the frictional force is set to be small, the stepped portion 2e is not provided and the tapered surface 2 is straight on the base metal body 2f.
It is also possible to connect the large diameter portions 2a of b.

If you want to point the antenna in the direction where the radio waves come from, you can pull out the rod 4 as much as possible, bend the rod 4 around the pin 8, and rotate the base metal fitting 2 in the desired direction, as shown in Figure 4. At this time, the base metal fitting 2 is firmly locked in that position by the spring force of the leaf spring 6.

When pushing the rod 4 into the guide pipe 1, the rod 4 and the base metal fitting 2 are kept straight, but when the rod 4 is pushed in slightly from the position shown in FIG. When the rod 4 is pulled out from between the inner surface of the guide pipe and returned to the state shown in FIG. It is pushed in while sliding on the inner surface.

As explained above, the present invention provides an enlarged part in the base metal fitting, forms a tapered surface on the circumferential surface of the enlarged part, and provides an elastic member (
A plate spring 6) is interposed to restrict the movement of the base metal fitting within the guide pipe, and when the rod is pulled out from the guide pipe to the maximum extent, the tip of the elastic member is held in contact with the retaining portion of the guide pipe. By this, the elastic member is pushed between the tapered surface and the inner surface of the guide pipe, and when the rod is pushed in from this state, the elastic member returns to its original position in front of the enlarged part, so that the rod cannot be pushed or pulled out. Sometimes, by appropriately adjusting the spring force of the leaf spring, it is possible to easily move the base metal fitting within the guide pipe, and also to firmly fix the rod in the desired direction when the rod is pulled out to the maximum extent.

In other words, while it is possible to relatively weakly restrict the linear movement of the push-out drawer of the base metal fitting within the guide pipe, it is possible to set strong restrictions on the rotation of the base metal fitting when using the antenna.

[Brief Description of the Drawings] Fig. 1 is a partial vertical sectional view of the rod antenna according to the present invention, Fig. 2 is a perspective view of the base metal fitting, and Figs. 3 and 4 are rod antennas showing the action of the leaf spring. FIG. 3 is a vertical cross-sectional view of the main part of the antenna. 1... Guide pipe, 2... Base metal fittings,
3... Thread running bracket, 4... Rod, 6...
・・・・・・Leaf spring.

Claims (1)

[Scope of utility model registration request] A rod is rotatably attached to a base metal fitting, this rod is housed in a guide pipe so that it can be pulled out, and the rotation of the base metal fitting is restricted so that the rod can be pulled out as much as possible from the guide pipe and fixed in a desired direction. In the rod antenna locking device, the base metal fitting is provided with an enlarged part whose diameter increases in the direction in which the rod is pushed in, and a tapered surface is formed on the circumferential surface of the enlarged part, and the base metal fitting main body in front of the enlarged part is formed. When the rod is pulled out to the maximum extent between the circumferential surface and the inner surface of the guide pipe, it comes into contact with the tip retaining part of the tip guide pipe and is pushed between the tapered surface and the inner surface of the guide pipe, and the rod is guided from the state where the rod is pulled out to the maximum extent. A locking device for a rod antenna, characterized in that an elastic member is provided which, when pushed into a pipe, returns to its original spatial position in front of the enlarged portion and restricts movement of the base metal fitting.