JPS6117607Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an antenna element device that is used for televisions, radios, etc. and is capable of expanding and contracting an antenna element.

Conventionally, this type of antenna element device accommodated a multi-stage antenna element in an extensible and retractable manner within an outer cylinder, and the antenna element was slid or rotated in the axial direction within the outer cylinder. It wasn't smooth either.

In view of the above points, the present invention allows the antenna element to slide lightly and smoothly within the outer cylinder, and also allows the antenna element to be rotated with a strong rotation holding force even when rotated in the circumferential direction. It is an object of the present invention to provide an antenna device that can achieve reliable operation and maintenance by balancing these elements.

Hereinafter, one embodiment of the present invention will be explained with reference to the drawings.A base metal fitting 1 for holding an antenna element is provided with a pivot support 3 formed into a bifurcated shape by cutting an axial pivot groove 2 in its upper part. , screw hole 4 on the side of the shaft support 3
is drilled there. A base metal fitting 6 is fixed to the base of the multi-stage expandable antenna element 5, and a through hole 7 is opened through the center of the base metal fitting 6. Insert this base metal fitting 6 into the pivot groove 2, and
The base metal fitting 6 is inserted into the through hole 7 and screwed into the screw hole 4 to connect the base metal fitting 6 to the base metal fitting 1 so as to be tiltable. A rotary shaft 9 having a diameter slightly smaller than the head is connected to the lower part of the base metal fitting 1, and an annular engagement groove 10 is provided on the upper part and an oil groove 11 is provided on the lower part at intervals on the outer periphery of the rotary shaft 9. It is cut into. Reference numeral 12 denotes a cylindrical bearing fitting with a shaft hole 13 opening through the center, and a collar portion 14 with a slightly larger diameter is formed at the upper part of the bearing fitting 12.
4 Sliding grooves 15 are provided in the axial direction at two opposing locations on the outer periphery.
is notched. A horizontal groove 16 is formed in the center of the side surface of the bearing fitting 12 and is cut into the shaft hole 13 at about 1/2 to 3/4 of the circumference. A vertical groove 17 cut into the shaft hole 13 is formed from the lower end of the bearing fitting 12 to the horizontal groove 16, and this vertical groove 17 is on an extension line of the sliding groove 15 in the axial direction. In addition, an engagement opening 18 is opened in opposing portions of the lower outer periphery of the bearing fitting 12.

To connect the base metal fitting 1 and the bearing metal fitting 12,
Apply grease to the oil groove 11, and insert the rotating shaft 9 into the shaft hole 1.
3 to align the engagement groove 10 and the horizontal groove 16, and insert a horseshoe-shaped stopper 19 into the horizontal groove 16 to connect the engagement groove 10 and the horizontal groove 16. This stopper 19 is made of synthetic resin so that the rotating shaft 9 can rotate smoothly, and is formed to be slightly narrower than the groove width of the engagement groove 10, so that it is loosely fitted into the engagement groove 10. Two elastic slide springs 20 curved in an arc shape are tightly attached to the outer periphery of the bearing fitting 12 so as to cover the vertical groove 17 as a boundary, and a protrusion 21 is provided on the inner lower part of the spring. the stopper 1 by fitting it into the engagement opening 18.
This prevents 9 from slipping out.

Further, reference numeral 22 denotes a thin-walled cylindrical outer cylinder, and a pair of opposing ribs 23 protrude from the inner circumferential surface of the outer cylinder in the length direction. This rib 23 is formed by drawing with a circular hole die and a ribbed plug.
The inner diameter of the outer cylinder 22 is the same as or smaller than the outer diameter of the flange 14, and the upper end of the outer cylinder 22 is folded back or has a stopper 24 formed inside thereof. To insert the bearing fitting 12 into the outer cylinder 22, insert the antenna element 5 through the lower end opening of the outer cylinder 22, align the sliding groove 15 of the flange 14 with the rib 23, and insert the bearing fitting 12 into the outer cylinder 22. Insert. The lower end opening of the outer cylinder 22 has a retainer for the bearing fitting 12,
A fastener 25 for fixing to an electrical appliance is sealed.

Next, the operation of this embodiment will be explained.

FIG. 2 shows the state in which the antenna element 5 is pulled out from the outer cylinder 22. The antenna element 5 can be freely tilted around the set screw 8, and can be rotated in the circumferential direction by the base metal fitting 1. . Base metal fittings 1
is prevented from coming off from the bearing fitting 12 by a stopper 19, and the bearing fitting 12 is prevented from coming off from the outer cylinder 22 by a retainer 24. When the base metal fitting 1 rotates in the circumferential direction within the shaft hole 13 of the bearing metal fitting 12, the bearing metal fitting 12 is pushed inward by the pressing force of the sliding spring 20 at the vertical groove 17 and horizontal groove 16 positions, and is strongly elastic. A rotating shaft 9 is clamped to generate an appropriate rotational friction force. Further, the slide spring 20 constantly presses the outer cylinder 22 to prevent the bearing fitting 12 from sliding into the outer cylinder 22 and falling. When the base metal fitting 1 rotates in the circumferential direction, the bearing metal fitting 12 cannot rotate due to the rib 23, so the rotation shaft 9 rotates within the shaft hole 13, but despite the pressing force of the slide spring 20. Grease applied to the oil groove 11 smoothes rotation and prevents both members from seizing. When storing the antenna element 5, the antenna element 5 is pushed in the axial direction, the bearing fitting 12 is slid within the outer cylinder 22 and pushed down, and the antenna element 5 is stored within the outer cylinder 22.

Since the present invention is configured as described above, when the antenna element slides inside the outer cylinder when it is housed or pulled out, the sliding groove 15 slides on the rib 23, and the slide spring 20 moves inside the outer cylinder 22. Since it is in contact with the surrounding surface, it moves smoothly while providing a suitable amount of resistance.
Rotation in the circumferential direction is carried out by the bearing fitting 12 coming into elastic contact with the rotating shaft 9 due to the pressing force of the slide spring 20, creating a constant frictional force, and making this rotation and sliding well-balanced and smooth. The antenna element can be reliably held at the moved position.

[Brief explanation of the drawing]

FIG. 1 is an exploded perspective view showing one embodiment of the antenna device of the present invention, and FIG. 2 is a side cross-sectional view showing the assembled state of the same. 1 ... base metal fitting, 5 ... antenna element, 9 ... rotating shaft, 12 ... bearing metal fitting, 13 ... shaft hole, 14 ...
... flange, 15... sliding groove, 16... horizontal split groove, 1
7...longitudinal groove, 19...stopper, 20...slide spring, 22...outer tube, 23...rib.

Claims (1)

[Scope of utility model registration request] A cylindrical bearing fitting is slidably inserted into the cylindrical outer cylinder, the rotating shaft of the base metal fitting is inserted into the shaft hole opened in the axial direction through the center of the bearing metal fitting, and the antenna element is inserted into the base metal fitting. In an antenna device in which the antenna element is connected and stored in an outer cylinder when not in use,
In the direction of the outer cylinder, a part of the bearing fitting having a flange is cut up to the shaft hole to form a horizontal groove for inserting the stopper, and in the axial direction of the bearing fitting,
A cut is made to the shaft hole, and a vertically divided groove is formed that extends from the horizontal groove to the lower end of the bearing fitting, and a slide spring that is locked to the bearing fitting is provided between the outer periphery of the bearing fitting and the inner periphery of the outer cylinder. An antenna device characterized in that a rib is provided inside the outer cylinder to protrude along the axial direction, and a sliding groove formed in the flange portion is slidably fitted into the rib.