JPS6019361Y2 - Auxiliary parts for antenna automatic expansion/contraction operation mechanism - Google Patents

Description

[Detailed description of the invention] The present invention relates to the invention of an auxiliary member for an automatic antenna expansion/contraction operation mechanism, in which a motor winds a wire in a spiral shape around a drum, and the wire is expanded/contracted by the rotation of the drum. By converting some of the parts of the antenna automatic extension/contraction operation mechanism that is designed to perform automatically, a different mechanism is obtained in which the wire extension/contraction operation is changed.

Conventionally, it has been common practice to rotate a winding drum using a motor in order to automatically extend and retract the antenna, and to extend and retract the antenna by operating a wire in and out of the casing by the rotation of the drum within the casing. It is being said.

That is, by connecting the tips of the wires extending or retracting from the casing as described above to the top of a known group of antenna elements assembled in multiple stages in a telescopic manner, Automatic expansion and contraction of the antenna element group is achieved, and the wire to be expanded and contracted as described above is designed to form a straight line at least when it is pulled out from the casing.

(For example, the wire is shaped with a linear material that does not leave any bending tendency even when the wire is wound up, or the wire is straightened by correcting the bending tendency when it is pulled out from the casing.) ), it becomes possible to use the wire itself, which is drawn out or shrunk in from the drum as described above, as an antenna.

However, in such a configuration, by changing the wire receiving state in the winding drum, the specific operating state of the antenna extending and retracting from the casing is changed.

If the wire is wound around the lid drum in a spiral shape in the circumferential direction, the position at which the wire is wound is the center of rotation of the drum at each point in time. The length of the antenna that expands and contracts with one rotation of the drum varies greatly depending on whether it is located near the position or on the outer periphery of the antenna, and the actual antenna expansion and contraction operation varies between the start and just before the end. It is inevitable that the amount of expansion and contraction of the antenna will be significantly different.

On the other hand, when winding wires with the same diameter in parallel around the circumference of the winding drum, the drum rotation angle is directly proportional to the amount of wire payout, and the amount of antenna expansion and contraction between the initial and final periods of drum rotation varies. It is clear that there will be no.

By the way, in the past, these two winding drums had their casings and motor drive mechanisms as well as their entire automatic expansion/contraction operation mechanisms designed separately, and separate parts were assembled for each, resulting in different designs as described above. This is unavoidable since the key parts of these mechanisms are completely different, but in this way two completely separate mechanisms are used.
Preparing and assembling each member of a system individually is extremely disadvantageous in terms of production management; in other words, preparing a series of separate members for multiple systems is not only complicated in itself, but also requires production to specifically assemble them. The line will have to be changed significantly, and there is also the possibility that parts may be handled incorrectly, so a considerable increase in costs is unavoidable in any case.

The present invention was devised through research to avoid the disadvantages of the conventional ones as described above, and to provide an automatic antenna telescopic operation mechanism with different performances as described above using a method advantageous in terms of production management. .

That is, the specific embodiment of the present invention will be explained based on the attached drawings. In this invention, an auxiliary member consisting of a casing inner partition plate 1 and a drum member 2 as shown in FIG. 2 is proposed. The structure of these members is as shown in FIG. 1. The partition plate 1, which is attached to the base member 3 of the casing containing the spiral drum, has an inclined guide groove 11 formed in a part thereof protruding in the thickness direction. An opening 12 corresponding to the outlet 31 in the base member 3 is provided at the most protruding end of the inclined guide groove 11, and a positioning protrusion 13 with respect to the base member 3 is formed on one side of the opening 12. Furthermore, an annular protrusion 14 for engaging the drum member 2 is provided on the other surface side.

However, the above-described drum member 2 has a wire receiving groove 21 formed in its circumference, and a ball-like Sun Tzu 5 is formed in the center of the drum member 2 in contrast to the fixed plate 30 set at the center of the base member 3 described above. A joining protrusion 22 is provided which is arranged oppositely through the joint protrusion 22, and a plurality of small holes 23 for engaging and disengaging with the Sun Tzu 5 are provided in the joining protrusion 22.

In the illustrated example, the drum member 2 is formed by two members 2a and 2b, and these two members 2at2b are connected to the engaging portion 2.
4 and 25, but as long as the wire receiving groove 21 and the joining protrusion 22 as described above are provided, it is natural that they may be integrally molded.

The mechanism for winding the wire in a spiral shape to which the present invention is applied as described above is conventionally known, and as shown in FIG. The base member 3, which is provided with a shaft and has the above-mentioned outlet 31 formed on the other side, has a recess 32 in the middle thereof in which the rotating gear 6 is housed, and the recess 32
The gear 6 accommodated in the worm shaft 4 is engaged with the worm shaft 4, and the stationary plate 30 is engaged with the gear 6, and the Sun Tzu 5 faces the small hole 30a of the base member. An annular intermediate plate 8 having a partial notch 8a and a drum plate 9 having a spiral receiving groove 9a are superimposed on each other, and a washer 17 and a pressing spring 18 are arranged in the center of the drum plate 7, and a cover 10 is provided. It is then tightened and assembled onto the central screw shaft 19 with a nut 16.

That is, the state in which the present invention shown in FIG. 2 is applied to such a conventional spiral wire winding mechanism is separately shown in FIG. 3, and the state shown in FIG. 1 is as follows. The base member 3, the worm shaft 4 driven by the motor 7, the rotary gear 6, the stationary plate 30, the Sun Tzu 5, the washer 17, the pressing spring 18, and the cover 10 are used as they are, and the annular intermediate plate 8 and drum plate 9 are used as they are. If it is assembled in this way, the guide groove 11 inserted into the opening 12 in the partition plate 1 can be inserted into the drum member 2. The wire is inserted into the wire receiving groove 21 in the circumference of the drum member 2.
It is clear that the antenna is sequentially fed into the drum, and a winding mechanism is obtained in which the antenna is extended and retracted at a constant speed from beginning to end in direct proportion to the drum rotation speed, with the same diameter.

According to the present invention as described above, by simply preparing a drum member for the partition plate, which is a small auxiliary member, it is possible to change the performance without changing most of the structural members or their manufacturing assembly line. It is possible to freely obtain an automatic antenna expansion/contraction operation mechanism according to each demand condition, which makes it possible to easily manage the production of this type of mechanism, and to provide the desired mechanism at a relatively low cost. That's why,
This is a device with great benefits in terms of practical production.

[Brief explanation of drawings]

The drawings are for explaining the technical relationship of the present invention, in which Fig. 1 is a partially cutaway front view of an antenna automatic telescopic operation mechanism using a conventional spiral winding drum type, and Fig. 2 is an auxiliary member according to the present invention. FIG. 3 is a partially cutaway front view of the device shown in FIG. 1 in which a member according to the present invention is assembled. In these drawings, 1 is a casing inner partition plate, 2 is a drum member, 3 is a base member, 4 is a rotating screw shaft,
5 is Sun Tzu, 6 is a rotating gear, 7 is a drum plate, 8 is an annular intermediate plate, 9 is a drum plate, 10 is a cover, 11 is an inclined guide groove, 12 is an opening thereof, 13 is an opening, 13 is a positioning protrusion,
14 is an annular projection, 21 is a wire receiving groove, 22 is a joint protrusion, and 23 is a small hole.

Claims (1)

[Scope of utility model registration request] The wire is spirally wound around a winding member that is rotated by a motor via a worm shaft and a gear, and the gear is attached to a fixed plate that is arranged in the center of the base member. This member is an auxiliary member to the automatic antenna telescopic operation mechanism, and is incorporated into the automatic antenna telescopic manipulation mechanism to wind the wire in the same diameter state around the circumferential portion of the winding member. Partition plate 1 attached to the base member of the antenna automatic expansion/contraction operation mechanism
The partition plate 1 is formed with an inclined guide groove 11 that communicates with an opening 12 corresponding to the outlet 31 of the base member 3, and also has an annular protrusion 14 that engages with the drum member 2. In addition, the partition plate 1 is provided with a positioning protrusion 13 for positioning the base member 3, and the drum member 2 is provided with a wire receiving groove 21 in its circumference facing the inclined guide groove. An auxiliary member for an automatic antenna telescopic operation mechanism, characterized in that an engaging protrusion 22 is provided that engages and disengages the appearance 5 of a fixed plate 30.