JPH0134408Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to the invention of a vehicle-mounted antenna expansion/contraction operation mechanism, in which a coaxial cable is directly connected to the antenna element, and the antenna element is operated by an operation wire wound around a winding drum driven by a motor. in which the cable is expanded and contracted and the cable is stored in a cable storage chamber assembled to the expansion and contraction operation mechanism,
The height of the operating mechanism and cable storage chamber are set in a low profile within a limited height space, and appropriate expansion and contraction operations can be smoothly realized with a relatively simple configuration. .

Due to the reception frequency (high frequency) of an on-vehicle antenna, it may be essential to connect the coaxial cable directly to the antenna element in order to achieve stable reception. Connect the operating wire from the inner winding drum to the coaxial cable connected to the antenna element as described above, pull out the coaxial cable from the storage chamber to extend the antenna element, and pull it back into the storage chamber. Therefore, the present applicant has proposed a structure as shown in Fig. 1 as such a mechanism (Japanese Patent Application No. 1983-1999).
No. 68454; Japanese Patent Application Laid-open No. 161401/1983), and it is beginning to have some effect. That is, a storage chamber 15 for organizing and storing the coaxial cables 2 is provided above the case 11 containing a drum driven by the motor 10, and the base tubes 8a of the auxiliary tubes 8 groups are inserted and fixed in the upper part of the storage chamber 15. The upper end of the telescopic operation wire 3 from the drum is connected to the coaxial cable 2, and the antenna element 1 is directly connected to the upper end of the coaxial cable 2. Accordingly, the coaxial cable 2 is pulled out from the storage chamber 15 or fed into the storage chamber 15, the antenna element 1 is extended or retracted upward, and the auxiliary tube 8 is telescoped to the lower end of the inner tube. By sequentially connecting the outer tubes, a mechanical expansion and contraction operation similar to that of a telescopic antenna for radio reception using general pipe material is achieved. However, in the case of this type, the above-mentioned storage chamber 15 together with the coaxial cable storage section has a part that performs a certain organizing or guiding function in order to store the coaxial cables 2 drawn in in an orderly manner and to ensure that there is no problem in subsequent withdrawal. As shown in the figure, since the storage chamber 15 is installed above the wire outlet 11a of the case 11, a considerable height is required. If this item is installed in the trunk of a vehicle, sufficient space is required below the setting part, and therefore there are restrictions on the specific setting position, and depending on the car model, it may not be possible to install it. There may be no. The present invention was devised after further study in view of the above-mentioned circumstances, and one of its embodiments is as shown in FIG. That is, in contrast to the one shown in Fig. 1, the wire outlet 11a is attached to the center of the bottom of the storage chamber 15, and the telescopic operation wire 3 is passed through the storage chamber 15 along the axial direction of the 8 groups of auxiliary tubes. In the device according to the present invention, an inclined introduction port 5a as an operation wire guide part is provided on the upper side of the storage chamber 5, the wire outlet 11a described above is attached to the inclined introduction port 5a, and the guide part 5c and the insertion hole for the coaxial cable 2 are installed. 5b are crossed at an acute angle, and the coaxial cable 2 pulled out from the storage chamber 5 is guided into the insertion hole 5b along the axial direction of the 8 groups of auxiliary tubes. The attached guide member 7 has a hollow shape 7a from the bottom surface, and the base end of the coaxial cable 2 is drawn out from the hollow shape 7a. As shown in the figure, since the guide portion 5c and the inclined introduction port 5a are inclined as described above, the motor 10 and the case 11 are installed in an inclined shape, and the guide member 7 in the storage chamber 5 is installed in a conical shape. When the coaxial cable 2 is dropped into the conical top part from above, it is inserted into the storage chamber 5.
The coaxial cables 2 are sequentially supplied to the storage space 6 between the inner surface of the storage space 6, and the coaxial cables 2 are stacked and stored in the storage space 6 in a spiral manner. The other structural relationships are the same as those shown in FIG. 1 described above. In addition, in the device according to the present invention, the operating wire guiding portion may be formed along the axial direction of the auxiliary tube 8, and the coaxial cable guiding portion may be formed inclined thereto, and further, both guiding portions 5 may be formed.
b and 5c may both be inclined. In any case, the angle formed by both guide portions 5b and 5c is acute, especially
The angle is 45° or less, preferably about 15 to 35°, especially about 20°.

The coaxial cable is pulled out and stored in the cable storage chamber formed at the lower end of the antenna base tube in the same manner as described above, and the coaxial cable is vertically wound and stored in the cable storage chamber. You may let them.

When according to the present invention described above, both guide portions 5b, 5
As described above, since the letters c intersect with each other at an acute angle, the storage chamber 5 and the case 11 having the motor-driven drum can be assembled at approximately the same height. The bottom of the case 11 and the bottom of the storage chamber 5 are at approximately the same position, and the height can be significantly shortened compared to the one in FIG. 1 where the bottom of the storage chamber 5 is located above the case 11. Therefore, it is possible to install the antenna without any trouble even in a space with limited height, and this type of antenna expansion/contraction operation mechanism can be freely applied to the trunk of a car or the like in a favorable relationship with other equipment. Moreover, as shown in the figure, the telescopic operation wire 3 from the drum inside the case 11 is guided at an inclination angle of about 30 degrees, and connected to the guide portion 5c, so that it can be extended with an appropriate propulsion force. The extension (or retraction) operation of the coaxial cable 2 by the telescopic operation wire 3 or the antenna element 1 via the coaxial cable 2 is the same as that in Fig. 1 (also in Fig. 1, the coaxial cable 2 is connected to its core wire and The coated wire has a certain degree of rigidity or elasticity, and is guided at an angle). The operation can be carried out effectively with a relatively simple structure by using a drum for winding up the operation wire, and furthermore, the coaxial cable 2 can be automatically and orderly stored in the storage chamber 5, and it can be pulled out. This is a highly effective idea in practical terms.

[Brief explanation of the drawing]

The drawings show the technical contents of the present invention, and FIG. 1 is a partially cutaway side view of the prior art by the present inventors, and FIG. 2 is a partially cutaway side view of the antenna telescoping operation mechanism according to the present invention. . In these drawings, 1 is an antenna element, 2 is a coaxial cable, 3 is a telescopic operation wire, and 4 is a coaxial cable.
5 is a connecting fitting, 5 is a storage chamber, 5a is an inclined introduction port, 5
b indicates an insertion hole serving as a coaxial cable guide section, 5c indicates a guide section for a telescopic operation wire, 7 indicates a guide section, 8 indicates an auxiliary tube, 8a indicates a base tube thereof, 10 indicates a motor, and 11 indicates a case housing a drum 12 therein. It is something.

Claims (1)

[Claims for Utility Model Registration] (1) A coaxial cable is directly connected to the antenna element, an operating wire from a motor-driven drum is connected to the coaxial cable, and the coaxial cable stored in a storage chamber is pulled out. Alternatively, in a device in which the coaxial cable is fed and expanded and contracted, the coaxial cable storage chamber described above is attached to the wire outlet of the case housing the drum, and a coaxial cable guide portion and an operating wire guide portion are formed separately in the storage chamber. At the same time, these guiding parts are made to intersect at an acute angle, and a connecting part for the above-mentioned operating wire and coaxial cable is provided in the coaxial cable storage chamber on the side of the antenna element from the crossing part, and on an extension line of the above-mentioned coaxial cable guiding part. An in-vehicle antenna expansion/contraction operation mechanism characterized by having a guide portion having a conical top. (2) Forming a coaxial cable guiding section along the axis of the auxiliary tube that guides the antenna element in and out;
The in-vehicle antenna extension/contraction operating mechanism according to claim 1, which is a registered utility model, has an operating wire guide section that is inclined at an acute angle with respect to the coaxial cable guide section.