JPH024492Y2 - - Google Patents

Description

[Detailed Description of the Invention] "Industrial Application Field" The present invention relates to an antenna element, and more specifically, to an antenna element that can be easily processed for conductivity and has excellent conductivity and durability.

``Prior art'' In general, antenna elements using carbon fiber glass fiber tubes with carbon fibers arranged in the middle,
As the conductive processing, as shown in FIGS. 4 and 5, the carbon fiber glass fiber tube 101 has a conductive layer 102 made of carbon fiber or the like interposed between the glass fiber inner tube layer 102 and the outer tube layer 103. Yes, 1
05 is a through hole into which a blind rivet 106 is installed. The end portion of the inner tube layer 102 of this glass fiber tube 101 is cut and removed by a certain length to leave the internal conductive layer 104 exposed, and a conductive adhesive 107 is applied to the exposed conductive layer 104.
is applied. For example, as shown in Figure 4,
The element holder 109 of the power supply terminal housing 108 forms an insertion hole 110 having an inner diameter approximately equal to the outer diameter of the glass fiber tube 101, and as shown in the figure, the end of the glass fiber tube 101 is inserted into the insertion hole 110.
It is to be set inside. In addition, the element holder 1
A rivet hole 111 having approximately the same diameter as the hole 105 is drilled on the upper surface of the 09, and the insertion hole 11 as described above.
A so-called blind rivet 106 is inserted into the rivet hole 1 for the antenna element set within 0.
11, and insert it into the hole 1 of the glass fiber tube 101.
05, and its lower end is expanded as shown in the figure. Reference numeral 112 is a conductive plate, which is connected to the element holder 109 and the blind rivet 10.
6, with a conductor 1 at one end.
13 is connected. Reference numeral 114 is a terminal housing lid. Note that what is shown in FIG. 4 is an example of the state in which the antenna element is used. This has already been shown in Utility Model Application Publication No. 58-13706 ``Antenna Element''.

"Problems to be solved by the invention" In the antenna element described above, the inner tube layer 102, which is thicker than the glass fiber outer layer tube 103, is removed by a certain length from the tube end, which makes the end thinner and less strong. It has the disadvantage of being weak. In order to solve this drawback, there is a method of forming a conductive layer on the inner peripheral side of the glass fiber tube 101, but this method is not preferable because it reduces the electrically effective diameter of the antenna element.
Therefore, the present invention aims to provide an antenna element that is sufficiently stronger than conventional antenna elements without impairing the electrically effective diameter of the antenna element.

``Means for Solving the Problems'' The present invention is a glass fiber tube with a conductive layer interposed between the inner tube layer and the outer tube layer, and a certain length of the end of the outer tube layer is removed to conduct the expose the layers,
A conductive material is applied to the exposed conductive layer, and an arc-shaped conductive plate is bent in half and connected with a locking piece.The locking piece is inserted into the notch at the end of the glass fiber tube to make the tube end conductive. The material and the inner tube layer are partially covered and the glass fiber tube and conductive plate are fixed to the element holder using blind rivets.

"Example" As shown in FIGS. 1 to 3, the glass fiber tube 1 has a conductive layer 4 such as a carbon fiber layer interposed between the glass fiber inner tube layer 2 and the glass fiber outer tube layer 3. There is. A certain length of the end portion of the outer tube layer 3 of the glass fiber tube 1 is removed to expose the conductive layer 4. A conductive adhesive 5 is applied to the exposed conductive layer 4. A hole 7 through which a blind rivet 6 is inserted is made in the area where the conductive adhesive 5 is applied, and a notch 8 is made in the end of the tube opposite to the hole 7.

On the other hand, a conductive plate 9 such as a stainless steel sheet having a thickness of about 0.1 to 0.3 mm, each of which is bent in two has an arc shape partially along the outer and inner circumferences of the glass fiber tube 1, and the glass fiber tube The conductive plate 9 is inserted from the tube end side into the conductive adhesive 5 and the inner tube layer 2 at the tube end, and is covered and held therebetween, and the narrow locking piece 10 at the bent connection portion of the conduction plate 9 is inserted into the notch 8. For rotation prevention and positioning, holes 11, 11 are drilled at locations corresponding to the hole 7.

The element holder 13 of the power supply terminal housing 12 has an insertion hole 14 having an inner diameter approximately equal to the outer diameter of the glass fiber tube 1, and the end of the glass fiber tube 1 is set into the insertion hole 14 as shown in the figure. It is something to do. Further, a rivet hole 15 having approximately the same diameter as the hole 7 is bored in the upper surface of the element holder 13.
For the antenna element set in the insertion hole 14 as described above, insert the blind rivet 6 through the rivet hole 15 and through the hole 11 of the conduction plate 9, the hole 7 of the glass fiber tube 1, and the hole 11 of the conduction plate 9. At least its lower end is expanded as shown in the figure, and the antenna element is electrically fixed. Reference numeral 16 denotes a conductive plate, which is positioned between the element holder 13 and the blind rivet 6, and has a conductive wire 17 connected to one end thereof. A resin rod 18 for fixing the conduction plate 9 can also be press-fitted into the tube end fixing position of the glass fiber tube 1. Reference numeral 19 is a terminal housing lid. It should be noted that the antenna element shown in FIG. 1 is an example of the state in which the antenna element is used, and it goes without saying that there are various other antenna elements in which blind rivets are attached to the antenna element to ensure conductivity.

"Effects of the Invention" As mentioned above, the present invention provides conductivity by removing a certain length of the end of the outer tube layer of a glass fiber tube with a conductive layer interposed between the inner tube layer and the outer tube layer. The layer is exposed, a conductive material is applied to the exposed conductive layer, and a locking piece is attached to the notch at the end of the glass fiber tube using an arc-shaped conductive plate that is bent in half and connected with a locking piece. This is an antenna element that is inserted and partially covers the conductive material at the end of the tube and the inner tube layer, and fixes the glass fiber tube and conductive plate to the element holder using blind rivets. Even if the fiber tube is processed by cutting off the outer tube layer, the glass fiber layer can be made thicker than the conventional one, and the strength can be increased.

Further, even if a large amount of the glass fiber layer of the outer tube layer on the surface is removed in order to reduce the contact resistance of the conductive layer, there is almost no decrease in strength. The means for fixing the antenna element using blind rivets in this structure can be carried out in the same manner as in the prior art. Furthermore, when applying the conductive adhesive to the conductive layer, it is applied to the outer surface, which is easier than applying it to the inner surface of the conventional antenna element. Further, the conductive plate can be made of a stainless steel sheet or the like with a thickness of about 0.1 to 0.3 mm, and the antenna element can be supplied at low cost. Furthermore, the conduction plate can be securely fixed to the glass fiber tube with the cut in the glass fiber tube.
The antenna element can be easily inserted into the power supply terminal housing.

[Brief explanation of the drawing]

Figure 1 is a vertical cross-sectional view of the antenna element of the present invention installed in a power supply terminal housing, Figure 2 is an exploded perspective view of the main parts of the antenna element of the present invention, and Figure 3 is an enlarged longitudinal cross-section of the end of the antenna element. FIG. 4 is a vertical cross-sectional view of a conventional antenna element mounted on a power supply terminal housing, and FIG. 5 is a vertical cross-sectional view of the end of a conventional glass fiber tube. 2... Glass fiber inner tube layer, 3... Glass fiber outer tube layer, 4... Conductive layer, 1... Glass fiber tube, 5... Conductive material, 10... Locking piece, 9...
...Conduction plate, 8...notch.

Claims (1)

[Scope of utility model registration request] A certain length of the end of the outer tube layer of a glass fiber tube with a conductive layer interposed between the inner tube layer and the outer tube layer is removed to expose the conductive layer, and a conductive material is applied to the exposed conductive layer. Apply the coating and insert the locking piece into the notch in the tube end of the glass fiber tube using an arc-shaped conductive plate that is folded in two and connected with a locking piece to partially remove the conductive material at the tube end and the inner tube layer. An antenna element characterized in that a glass fiber tube and a conductive plate are fixed to an element holder using blind rivets.