JPS6025144Y2 - portable antenna - Google Patents

Description

[Detailed explanation of the invention] This invention was developed by visiting a large number of locations one after another in order to investigate the area behind buildings for TV reception and to select reception points when installing communal reception facilities. The present invention relates to a portable antenna used to measure the strength of television radio waves at various locations.

The purpose of this is that when the antenna is to be used for measurement, it can be assembled into a state that provides the correct electrical characteristics with simple operations, and that it can be assembled with simple operations after use. To provide a portable antenna that can be folded into a compact rod-like state that is easy to transport.

The drawings showing the embodiments of the present application will be described below.

In FIG. 1, 1 indicates a portable antenna, and arm 2
In this configuration, a plurality of antenna elements 31, 32, . . . , 38 are arranged.

As shown in FIG. 3, the arm 2 is provided with a large number of through holes 2a for weight reduction.

Further, the spacing between each antenna element is set in a well-known manner so as to obtain good electrical characteristics.

Next, one antenna element 31 (reflector) of the plurality of antenna elements will be described in detail with further reference to FIGS. 3 to 5.

Reference numeral 5 denotes a support body, which is attached to the element firing piece 6 and the leg piece 7, and is shaped by bending a sheet metal.

Further, the support body 5 is pivotally attached to the arm 2 by a pivot piece 9.

The pivot piece 9 is formed in a U-shape and is inserted into a through hole 8 formed in the leg piece 7 and a through hole 2b formed in the arm 2, and its tip is crushed to partially expand it. By letting it come out, it is possible to prevent it from coming out of the through hole.

Reference numeral 10 denotes an antenna element whose base part is fixed to the element element lighting piece 6, and is shaped using a thin metal rod (for example, about 2 diagonals).

The attachment may be done by soldering or welding as shown in the figure, or by any other means such as screw tightening.

Reference numeral 13 denotes a pulling spring, which is formed into a V-shape as shown in the figure, and whose free end 14 is inserted into a through hole 15 formed in the leg piece 7 of the support body 5.

Further, it is prevented from coming off from the through hole 15 by the same means as the pivot piece 9.

Although the antenna element 3□ (reflector) has been described above, the other antenna elements 3□, 33, . . . have the same configuration, so a redundant explanation will be omitted.

In addition, like the radiation element 33, the left and right antenna element elements 10
3, 103, or between them and the arm 2, an insulating member 16 is naturally interposed between the element element 103 and the support body 5.

In addition, the two antenna elements 3□ and 38 (
As shown in FIG. 6, the waveguide is attached to the arm with the front and back of the antenna element 31 reversed, and the pull spring 13 is also located below the arm.

Next, the linking mechanism 17 for linking each antenna element 31 will be explained.

18. Reference numerals 18 and 18 refer to pulleys pivoted to the tip and rear ends of the arm 2, respectively, and 19 is a connecting cable suspended between both pulleys, which is made of wire.

The connecting cable 19 is guided by a guide portion 9a in the U-shaped pivot piece 9, and the connecting cable 19 is provided with a pull spring 1 in each antenna element.
The central portions 13c of 3 are connected as shown in FIG.

In the structure described above, the antenna element element 10.10 of the antenna element 31 is changed from a state in which it is in a laid down position as shown in FIG. 5A to a state in which it is located in an upright position as shown in FIG. If so, proceed as follows.

First, when the element elements 10.10 are expanded in the direction of the arrow 21 against the biasing force of the pulling spring 13, as shown in FIG. The free end 14) crosses a straight line 22 passing through the respective pivot points of both supports 5 with respect to the arm 2 (the part through which the pivot piece 9 is inserted).

Then, even if the element element 10.10 is no longer expanded by hand, the element element 10.10 is further expanded in the direction of the arrow 21 due to the biasing force of the spring 13, and as shown in FIG. A stopper 6a provided on a part of the arm 2 comes into contact with the arm 2, and the element element 10 stands up almost perpendicularly to the arm 2.

When one element 31 is operated as described above, the movement is transmitted to the other elements via the connecting cable 19.

That is, the pulling spring of each element moves in a direction that opens the element elements of each element.

For this reason, the element elements of those elements open all at once in conjunction with the movement of the element elements opened manually.

Next, when folding the element, the element 10.10 shown by the arrow 23 in FIG. 5C is folded down.

Eventually, when the state of B in the figure is passed, the element element 10°1
0 is pulled along the arm 2 by the biasing force of the spring 13, as shown in FIG.

In this case as well, the above-mentioned movement is transmitted to other elements via the connecting cable 19, and the element elements of those elements are folded in conjunction with each other.

Therefore, when opening a large number of elements to use this antenna, simply open any one element by hand, and the other elements can be opened in conjunction with it as shown in Figure 1. can.

Further, in that case, the element elements in each element are also positioned at correct positions by the stopper coming into contact with the arm.

Also, when the antenna is finished being used and it is folded up for transport, simply folding one element by hand allows the other elements to be folded together as shown in Figure 2.

As described above, in the present invention, when expanding the antenna element element 10 which is laid down along the arm 2 as shown in FIG. 2 or 5A, the element element is oriented in the direction of the arrow 21. The antenna element element 10 has the advantage of being able to maintain the upright position at the correct position as shown in FIG.
When folding up the device, the device elements 10 are simply folded down in the direction of the arrow 23, and each device element 10 is placed in a collapsed state along the arm 2, and it is convenient to maintain that state.

Moreover, according to the present invention, it is possible to sequentially link the raising and lowering operations of the respective antenna elements in multiple pairs of antenna elements, and even with such linking, each antenna element cannot be moved at an accurate position. It has features that allow it to maintain an upright position and allow it to lie down against the arm.

[Brief explanation of the drawing]

The drawings show an embodiment of the present application, and FIG. 1 is a perspective view showing the antenna in an expanded state, FIG. 2 is a perspective view showing the antenna in a folded state, and FIG. FIG. 4 is a horizontal sectional view of the same, FIG. 5 is a plan view showing the opening and closing process of the antenna element, and FIG. FIG. 7 is a partially cutaway perspective view and a schematic illustration of the linkage mechanism. 2... Arm, 31, 3□...38.
... Antenna element, 10 ... Antenna element element, 13 ... Attraction spring, 19 ...
・Connection rope.

Claims (1)

[Scope of utility model registration request] In a portable antenna in which a plurality of antenna elements are arranged at appropriate intervals in the longitudinal direction of the arm, each antenna element is a pair of antenna elements that protrude left and right from both sides of the arm, respectively. Moreover, each antenna element element has its base pivoted to the arm so that it can be raised and lowered freely, and the base of each antenna element is pivoted so that it can be held in the upright position by abutting against the arm in the upright position. A stopper is provided at each antenna element, and a pulling spring is installed between the base parts of each antenna element in each antenna element, and the stopping position of the pulling spring is determined by the pivot point in each antenna element. It is located at a position slightly closer to the tip than the point, and at a position where it can cross a straight line passing through the two pivot points of the pair of antenna element elements when the antenna element element is raised or lowered, and furthermore, the above-mentioned pulling spring The planar shape is shaped into a V-shape, and both ends are fixed to the fixing positions at the base portions of the pair of antenna elements, respectively, while the central part is positioned along the arms, and the center part is positioned along the arms. A portable antenna characterized in that the center portions of the V-shaped pulling springs located at the top are connected to each other by a connecting cable.