JPH0218571Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a vehicle antenna device that is attached to an automobile or the like.

[Conventional technology]

Conventionally, as a vehicle antenna device, as shown in FIGS. 6 and 7, a grounding fitting 2 is slidably fitted to the tip of an outer tube 1, and this grounding fitting is fitted to the base end of the grounding fitting 2. A concave groove 3 for preventing rotation is formed at the base end of the metal fitting 2, a power supply part 4 is provided on the outer tube 1, and a convex part 5 made of synthetic resin constituting the power supply part 4 is provided on the outer peripheral tip side of the power supply part 4. It is known that the grounding fitting 2 is prevented from rotating by protruding and fitting the concave groove 3 of the grounding fitting 2 into this convex portion. Furthermore, the seventh
In the figure, reference numeral 1a denotes a threaded portion formed at the most distal end of the outer tube 1.

[The problem that the idea aims to solve]

Recently, in vehicle antenna devices such as those mentioned above,
In many cases, the outer tube 1 is shipped without a tightening nut screwed into the threaded portion 1a at the tip end, and as shown in FIG. In this case, there is a problem that the grounding fitting 2 easily comes off, and also that the grounding fitting 2 comes off during the work of installing the antenna device on a vehicle such as an automobile.In order to prevent these problems,
The grounding fitting 2 has also been temporarily fixed to the outer tube 1 side with tape, but this also has the problem that the tape must be removed when installing the antenna device, which is time-consuming.

The present invention solves the above-mentioned problems and provides a relatively simple vehicle antenna device in which the grounding fitting remains attached to the outer tube and does not come off even if the tip of the outer tube is directed downward or diagonally downward. The purpose is to provide this information in a simple structure.

[Means to solve the problem]

In order to achieve the above object, the present invention provides a vehicle antenna device in which a grounding fitting is slidably fitted to the tip of an outer tube, in which a hooking groove is provided at the base end of the grounding fitting. The latching groove has an opening width to the base end surface of the grounding fitting narrower than the width of the distal end side through the step, and a pair of elastically deformable latching protrusions on the distal end side of the power feeding part provided on the outer tube. A gap is provided between these protrusions so that they protrude, and a latch claw protruding to the outside of the tip of the sealing protrusion is hooked to the step of the latch groove from the tip side, so that the latch protrusion is inserted into the latch groove. It is characterized by being removably engaged.

[Effect]

As mentioned above, the present invention not only prevents the rotation of the earthing fitting by engaging the pair of elastically deformable latching protrusions provided on the power supply part of the outer tube with the latching groove of the earthing fitting. A latching claw is protruded from the outside of the distal end of the latching protrusion, and the latching groove of the grounding fitting is formed through a step so that the opening width on the proximal end side is narrower than that on the distal end side, and the latching claw is latched. By engaging the step of the stop groove from the distal end side, the grounding fitting can be restrained from moving axially toward the distal end with respect to the outer tube.
Even if the grounding fitting is turned downward without the tightening nut being screwed into the threaded part at the tip of the outer tube,
The grounding fitting does not come off the outer tube, and when installing the antenna device on a vehicle, it is elastically deformed inward to narrow the gap between the latching protrusions (see Figure 5). By unlatching the pawl and the step of the latching groove and pulling out the latching protrusion from the latching groove, the grounding fitting can be easily rotated and moved in the axial direction with respect to the outer pipe, and the latching protrusion can be integrally molded with the synthetic resin that makes up the power supply part when molding it, and the latching groove can also be easily formed on the grounding metal fitting.
There is no need for a separate member such as tape for fixing the grounding fitting, and the configuration is relatively simple.

〔Example〕

Hereinafter, one embodiment of the present invention will be described with reference to FIGS. 1 to 5.

In FIGS. 1 to 4, reference numeral 6 designates an outer tube to which a telescopic rod antenna element (not shown) is attached, and a threaded portion 6a is formed at the tip end of the outer tube 6. A power supply section 7 made of synthetic resin is provided, and a grounding fitting 8 is slidably fitted to the distal end of the outer tube 6 on the distal side of the power supply section 7 .

The grounding fitting 8 has a slanted flange 10 integrally formed at the tip of a cylindrical body 9, and a locking groove 11 formed at the base end of the cylindrical body 9. The latching groove 11 is
An opening is opened in the base end surface of the grounding fitting 8, and the width of the opening 11a on the base end side is formed into a convex shape in the expanded plane, which is narrower than the width of the opening part 11c on the front end side via the step 11b. In addition, a pair of latching protrusions 13 are provided at the outer peripheral tip of the power feeding section 7.
is projected along the axial direction of the outer tube 6.
The proximal end of the latching protrusion 13 is located within a groove 12 provided at the distal end of the outer periphery of the power supply section 7, and the length of the protrusion from the distal end surface of the power supply section 7 is relatively short. Further, a gap 14 along the axial direction is formed between the pair of latching protrusions 13, and a latching pawl 13a having a substantially right triangular shape is formed on the outside of the tip of the latching protrusion 13.
are protruding from each other.

In the vehicle antenna device of the embodiment having the above-mentioned parts, the earthing fitting 8 fitted to the distal end of the outer tube 6 is moved relative to the proximal side with respect to the outer tube 6, and the latching groove 11 is opened. Push it into the latching protrusion 13. Then, since the latch claw 13a has a substantially right triangular shape, the tip of the latch protrusion 13 is elastically deformed, and the gap 14 between them becomes narrower, so that the narrow opening 11a of the latch groove 11 is hung. When the retaining claws 13a pass through and reach the wide end side 11c of the retaining groove 11,
As the latching protrusion 13 attempts to return to its pre-deformation shape with its elastic restoring force, the latching claw 13a is latched to the step 11b of the latching groove 11 from the tip side. Therefore, the grounding fitting 8 is restrained from moving axially toward the distal end with respect to the outer tube 6, and the distal end of the latching protrusion 13 is inscribed in the groove wall of the latching groove 11 by these elastic restoring forces. As a result, the grounding fitting 8 is held on the power supply section 7 without wobbling (see FIG. 4). Therefore, if shipped in this state, even if the tightening nut is not screwed into the threaded portion 6a at the tip of the outer tube 6, and even if the grounding fitting 8 is turned downward or diagonally downward during transportation, the outer The grounding fitting 8 does not come off from the pipe 6, and there is no need to use temporary fixing tape or the like. Furthermore, when installing the antenna device on a vehicle such as an automobile, as shown in FIG.
3 is moved inward, elastically deformed so as to narrow the gap 14, and the grounding fitting 8 is pulled toward the tip side of the outer tube 6, thereby removing the latch claw 13a and step 11b without using tools or other equipment. The locking projection 13 can be easily pulled out from the locking groove 11 by removing the lock from the locking groove 11, thereby making it possible for the grounding fitting 8 to rotate and move in the axial direction with respect to the outer tube 6.

In this embodiment, by locating the proximal end of the latching protrusion 13 in the groove 12 provided at the outer peripheral tip of the power feeding part 7, the protrusion length of the latching protrusion 13 from the distal end surface of the power feeding part 7 is reduced. Although the latching protrusion 13 is short, the latching protrusion 13 can be easily elastically deformed. However, the latching protrusion 13 may be protruded from the distal end surface of the power feeding section.

[Effect of idea]

As explained above, according to the present invention, a latching groove is provided at the base end of the grounding metal fitting, and this latching groove has an opening width on the base end surface of the earthing metal fitting that is larger than the width on the distal end side via the step. A pair of elastically deformable latch protrusions are formed narrowly and protrude from the distal end side of the power supply part of the outer tube with a gap between them, and the latch claws protruding outward from the distal ends of the latch protrusions are connected to the aforesaid latch. Since the locking protrusion is removably engaged with the locking groove by locking it into the step of the locking groove, the grounding fitting is restrained from rotation and axial movement toward the distal end of the outer tube. It can be shipped, and the grounding metal fitting can be prevented from coming off from the outer tube during transportation without using tape or the like. Also, when installing the antenna device, the hook between the latch claw and the step of the latch groove can be unlatched. ,
The latching protrusion can be pulled out from the latching groove to allow the grounding fitting to be easily rotated and moved in the axial direction with respect to the outer tube, and furthermore, it is possible to provide a vehicle antenna device with a relatively simple configuration. It will be done.

[Brief explanation of the drawing]

Fig. 1 is an exploded perspective view of the main parts of an embodiment of the present invention, Figs. 2 and 3 are plan and front views of the main parts of the outer tube, and Fig. 4 is the latch projection and latch. FIG. 5 is a front view showing the state in which the latching protrusion is elastically deformed; FIG. 6 is a front view showing the conventional example in which the grounding fitting is engaged with the power supply part. , FIG. 7 is a perspective view of the grounding metal fitting removed from the power supply section. DESCRIPTION OF SYMBOLS 1...Outer tube, 1a...Threaded part, 2...Grounding fitting, 3...Concave groove, 4...Power supply part, 5...Convex part,
6... Outer tube, 6a... Threaded part, 7... Power feeding part,
8... Earth metal fitting, 9... cylinder, 10... flange, 11... latching groove, 11a... opening, 11b
...Step, 11c...Tip side, 12...Groove, 13...
...Latching protrusion, 13a...Latching claw, 14...Gap.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) In a vehicle antenna device in which a grounding fitting is slidably fitted to the tip of an outer tube, a hooking groove is provided at the base end of the grounding fitting, and this hooking groove is provided at the base end of the grounding fitting. The stop groove is formed so that the opening width to the base end surface of the grounding fitting is narrower than the width of the distal end side through the step, and a pair of elastically deformable latching protrusions are attached to the distal end side of the power feeding part provided on the outer tube. A gap is provided between the protrusions to protrude, and a latch claw protruding to the outside of the tip of the latch protrusion is hooked to the step of the latch groove from the tip side, so that the latch protrusion is engaged with the latch groove. A vehicle antenna device characterized in that the antenna device is removably engaged. (2) The locking protrusion is protruded from the distal end surface of the power feeding part with its base end located within a groove provided at the outer peripheral end of the power feeding part, Claim No. The vehicle antenna device according to item 1.