JPS5821204Y2 - Electric telescopic antenna device - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an electric telescoping antenna device mounted on a vehicle such as an automobile, and more particularly to rainwater countermeasures within a drum in which a cable for extending and retracting the antenna is wound and housed.

In this type of device, a wire runs inside a telescopically connected antenna, one end of which is fixed to the tip of the antenna, and the other end is wound around a drum.The drum is rotated by a motor to wind up the cable. Alternatively, the antenna can be expanded or contracted by unwinding it.

Therefore, if rainwater gets inside the antenna through the joints,
The water flows along the cable to the drum side and collects in the annular groove in which the cable is wound.

As a result, when the cable is wound up, the cable compresses the accumulated water, adding overload to the motor, causing the cable to run underwater, making abnormal noises when pushing through water, and causing corrosion and freezing of the drum. There was a problem of inviting such things.

This invention was made to solve these problems,
An object of the present invention is to provide an electric telescopic antenna device which is improved so that water accumulated in an annular groove in which a cable is wound and accommodated in a drum is quickly discharged to the outside.

Hereinafter, one embodiment of the present invention will be specifically described with reference to the drawings.

In the drawings, reference numeral 1 denotes a housing constituting the outer shell of the device, in which a shaft 2 is fixed at the center, and a hollow shaft body 3 is rotatably fitted into the shaft 2.

A drum 4 is integrally fixed to one end of the shaft body 3, and a worm wheel 6 rotated by power from a motor 5 is attached to the other end.
A clutch 7 is provided between the shaft body 3 and the worm wheel 6 so as to interrupt the relationship between the shaft body 3 and the worm wheel 6 when a large load is applied to the shaft body 3 side.

The drum 4 has an annular groove 10 formed at its peripheral edge with a diameter gradually changing in the axial direction between an inner circumferential wall 8 and an outer circumferential wall 9.
is connected to a guide groove 11 on the side of the housing 1, and a cable 12 from the antenna side passes through this guide groove 11 and is wound and accommodated in the annular groove 10.

Therefore, according to the present invention, in such a drum 4, a plurality of drain holes 13 are bored on the outer circumferential wall 9 side of the circumferential walls 8 and 9 forming the annular groove 10, and a plurality of drain holes 13 are bored in the vicinity of the drain holes 13 of the housing 1. A drain pipe 14 is connected to the lowermost position of the drain pipe 14.

Thus, since the present invention is constructed as described above, the motor 5 operates the worm wheel 6, the clutch 7, and the shaft body 3.
The drum 4 rotates through the annular groove 10 and the guide groove 11 to raise the antenna, and conversely the cable 12 is wound from the guide groove 11 into the annular groove 10 to lower the antenna. I learned to do it.

Then, when the antenna reaches its upper limit or lower limit and the cable 12 becomes tense, a load above a certain level is applied to the shaft body 3 together with the drum 4, the clutch 7 is automatically disengaged and the worm wheel 6 idles, causing the antenna to move toward the antenna side. The blade will no longer work.

When the antenna is electrically extended and retracted in this way, if rainwater enters the antenna through the joints, the water will flow into the cable 1.
2 and flows into the annular groove 10 of the drum 4, and immediately after flowing into the annular groove 10, it is discharged toward the housing 1 through the drain hole 13.

The water discharged into the housing 1 is further discharged to the outside through a drainage pipe 14, and the water is discharged to the outside through a drain pipe 14.
The accumulation of water will be completely eliminated.

As described above, according to the present invention, the annular groove 10 in which the cable 12 is wound and accommodated in the drum 4 and into which rainwater is introduced is drained and no water accumulates there, so that it is possible to avoid overheating of the motor 5 as in the conventional case. Problems such as loading, generation of abnormal noise, and corrosion of the drum 4 etc. are eliminated.

In addition, drain holes 13 are also formed at the corners of the outer circumferential wall 9 of the annular groove 10 in which the cable 12 of the drum 4 is wound and housed. Even when the annular groove 10 is at the lowest position, water can be reliably drained from the annular groove 10, and furthermore, the corner portion of the outer peripheral wall 9 can be easily bent.

[Brief explanation of drawings]

FIG. 1 is a plan view showing an embodiment of the device according to the present invention, and FIG. 2 is a side view showing a part thereof in section. DESCRIPTION OF SYMBOLS 1... Housing, 2... Shaft, 3... Shaft body, 4... Drum, 5... Motor, 6... Worm wheel, 1... Clutch, 8... Inner peripheral wall , 9...
・Outer peripheral wall, 10... Annular groove, 11... Guide groove, 12
... Cable, 13... Drain hole, 14... Drain pipe.

Claims (1)

[Scope of utility model registration request] In an electric telescoping antenna device, the cable from the antenna side is wound and housed in an annular groove on the peripheral edge of the drum, and the antenna is expanded and contracted by rotating the drum by a motor and winding or unwinding the cable, An electric telescoping antenna device, characterized in that a plurality of drainage holes are formed in the outer peripheral wall forming the annular groove of the drum to drain water that accumulates in the annular groove through the cable.