JP2501867Y2 - Loop antenna - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a loop antenna used in a tuner or the like.

[Summary of the Invention] In this invention, in a loop antenna formed by winding a wire around a ring-shaped frame, both ends of a wire in which a plurality of conducting wires are arranged in parallel and mechanically integrated are opposed to each other. Each of the conducting wires is connected one by one so as to form a coil shape through a connecting means, and the above-mentioned wire material, which is formed into a loop shape as a whole, is fitted into the frame body, so that the loop can be easily performed with a small number of steps. The antenna can be accurately manufactured without variation.

[Prior Art] For example, a loop antenna used for a tuner or the like is known. This will be described in detail with reference to FIG. 9. Reference numeral 50 is a loop antenna, which is a collar portion 51 standing up and down in the front and rear direction.
A single vinyl electric wire (wire material) 52 is wound around a square ring-shaped resin frame 51 having a and 51b a required number of times (8 times in the case of this conventional example), and electronic equipment such as a tuner on both ends of the vinyl electric wire (wire material) 52 is wound. It was manufactured by twisting the lead lines 52a and 52b for connecting to the cable to prevent noise. It should be noted that reference numerals 51c and 51d in FIG. 9 denote leg portions, and the flange portions 51 at the front and rear of the frame body 51 are provided.
It is integrally molded in the lower center of a, 51b.

[Problems to be Solved by the Invention] However, when manufacturing the conventional loop antenna 50 described above, it is inconvenient to manually wind the vinyl electric wire 52 around the large-diameter frame 51 multiple times. In addition to the manufacturing process of winding the vinyl electric wire 52 around the frame body 51, a process of twisting the lead wires 52a, 52b is required separately, which requires a lot of manufacturing man-hours and becomes complicated. There was a problem that the product was not good and the product was likely to vary.

Therefore, the present invention provides a loop antenna that can be manufactured accurately and easily with a small number of steps.

[Means for Solving the Problems] A wire rod in which a plurality of conductive wires are arranged in parallel and mechanically integrated is formed into a coil so that the opposite conductive wires at both ends are offset by one by one. To the frame body formed into a loop shape with a U-shaped cross section, and the leg portion is integrally provided on the frame body. The portion is provided with an engaging portion that engages and holds the connection plate.

[Operation] Through a connecting plate so that both ends of a wire rod in which a plurality of conducting wires are arranged in parallel and mechanically integrated are displaced one by one from the opposing conducting wires at the both ends to form a coil shape. Simply connect the wire rods that are connected to each other into a loop and fit the loop-shaped frame with a U-shaped cross-section, and engage and hold the connection plate with the engaging portion of the leg portion provided on the frame. Because it is enough,
Unlike the conventional case, the step of winding the wire around the frame body a plurality of times is unnecessary, and the loop antenna can be easily and accurately manufactured in a simple process without variation.

Embodiment An embodiment of the present invention will be described below in detail with reference to the drawings.

In FIGS. 1 and 2, 1 is a loop antenna used for a tuner or the like (not shown), and a plurality (8 in this embodiment)
The flat ribbon cord 10 as a wire material in which the conductors 11, ... of the above) are arranged in parallel and mechanically integrated, and the opposite conductors 11 and 11 at both ends 10a and 10b of the flat ribbon cord 10 are A rectangular printed circuit board (connection board) 20 as a collective connection means for connecting in a coil shape by shifting one by one,
A frame body 30 made of a resin having a U-shaped cross section and a square ring (loop) shape as a whole, which fits the flat ribbon cord 10 which is connected in a loop shape through the printed circuit board 20, and the flat shape shape. The two conductors 41, 41 connected to each other via the printed circuit board 20 are arranged in parallel to the conductors 11, 11 of the ribbon cord 10 at both ends 10a, 10b, respectively, and are mechanically integrally molded. The lead wire 40 is connected to a predetermined position in an electric device such as a tuner.

The flat ribbon cord 10 has eight conductors 11 arranged in parallel through the upper and lower molds 4 and 5 shown in FIG. 8 and mechanically covered with an insulating film 12 made of resin such as vinyl. It is integrally molded. Similarly to the flat ribbon cord 10, the lead wire 40 is also mechanically integrally formed by covering the two conducting wires 41, 41 with a resin insulating film 42.

The printed circuit board 20 has a plurality of small holes 21a, ..., 21b ,. As shown in FIGS. 1, 2, and 4, the small holes 21a on the left side of the printed circuit board 20 ,.
Is mounted on each of the lead wires 11 at one end 10a of the flat ribbon cord 10 so as to project to the back surface of the printed circuit board 20, and each lead wire at the other end 10b of the flat ribbon cord 10 is inserted in each of the small holes 21b on the right side. Each of the conductors 11 at the one end 10a is displaced from the other conductor 11 by one, and is mounted so as to project from the back surface of the printed circuit board 20.
Then, the upper and lower conductive wires 11, 11 projecting on the back surface of the printed circuit board 20 are connected by soldering (the pattern by this soldering is shown by reference numeral 22). In this way, the conductors 1 of both ends 10a, 10b of the flat ribbon cord 10 are
By simply shifting the wires one by one and connecting them via the printed circuit board 20, it is possible to easily obtain a loop-shaped wire rod similar to a conventional vinyl electric wire wound eight times. Then, the upper and lower conductors are shifted one by one and face each other.
Two lead wires 41, 41 of the lead wire 40 are mounted on the small holes 21a, 21b facing the respective lead wires 11, 11 without 11 and soldered in the same manner. twenty three
).

Note that FIG. 5 shows another mode of the printed circuit board (collective connection means) 20. The pattern 2 on the left side in FIG. 5 is provided on the back surface of the printed circuit board 20 at the end 10a side of the flat ribbon cord 10.
3 and one conducting wire 41 of the lead wire 40 inserted in the small hole 21a at the right end in FIG. 5 are connected by a U-shaped pattern 24 by soldering. As a result, the lead wire 40 can be easily pulled out from the front end side of the printed circuit board 20.

Further, FIGS. 6 and 7 show a connector (connection plate) 25 as another embodiment of collective connection means. Both ends 10a, 10 of the flat ribbon cord 10 are inserted into rectangular connection holes 26, 26, ...
Each of the lead wires 11 of b is shifted and mounted and projected, and the two lead wires 41, 41 of the lead wire 40 are mounted and projected in the connection holes 26, 26 located at both ends shifted by one character. I am allowed. Then, the conducting wires 11, 11 facing each other and the conducting wires 11, 41 facing each other are connected so as to sandwich the engaging recesses 27a, 27b formed at both ends of the U-shaped connecting terminal 27 shown in FIG. There is. As a result, the flat ribbon cord 10 can be connected in a loop like the connection of the printed circuit board 20.

The frame body 30 fits the flat ribbon cord 10 connected in the loop shape to a square ring-shaped body portion 31a, and has an outer frame having a flange portion 31b standing upright at the rear edge of the body portion 31a. 31 and an inner frame having a square ring-shaped body portion 32a fitted to the inner peripheral surface of the body portion 31a of the outer frame 31, and a flange portion 32b standing upright at the front edge of the body portion 32a. It is composed of 32 and. The outer frame 31 and the inner frame 32 are the body portion 31 of the outer frame 31.
A plurality of recesses 31c are formed on the inner peripheral surface side of a, and the body portion of the inner frame 32 is
A plurality of protrusions 32c formed on the outer peripheral surface side of 32a are engaged with each other to prevent the protrusions 32c from coming off. Further, rectangular notches 31d, 32d are formed in the lower center of each of the flange portions 31b, 32b of the outer frame 31 and the inner frame 32, and the leg portions 31e, 32e are reversed downward in the lower center thereof. The protrusions are integrally molded to form a V shape. Further, cutout portions (engagement portions) 31 into which both ends of the printed circuit board 20 are fitted are provided on the inwardly facing inner surfaces of the leg portions 31e, 32e.
f and 32f are formed respectively.

According to the loop antenna 1 of the above embodiment, both ends 10a, 10b of the flat ribbon cord 10 in which eight conductors 11 are arranged in parallel and mechanically integrated are opposed to each other at both ends 10a, 10b. The above-mentioned flat ribbon cords 10 are arranged so that each conductor wire 11 is displaced one by one through a printed circuit board 20 so as to form a coil, and the whole is looped to be wound in eight turns inside a pseudo wire. Body part 31a of the outer frame 31 in the shape of a square ring
After fitting to the outer peripheral surface of the outer frame 31, it is only necessary to fit the body portion 32a of the inner frame 32 to the inner peripheral surface of the body portion 31a of the outer frame 31, so that the loop antenna 1 can be easily dispersed with a small number of steps. Can be manufactured accurately without. When fitting the loop-shaped flat ribbon cord 10 to the body portion 31a of the outer frame 31, by soldering the lead wires 41 and 41 of the lead wire 40 to the printed circuit board 20 in advance, as in the conventional case. Since the work of twisting the lead wire is not necessary, the number of manufacturing steps can be further reduced. The lead wire 40 is formed of an insulating film 42 so that each lead wire 41, 41
Since it is integrally molded, it is possible to take measures against noise and the like without twisting as in the conventional case.

In addition, the front and rear ends of the printed circuit board 20 are provided with legs 32e of the inner frame 32.
It is fitted and sandwiched between the notch 32f and the notch 31f of the leg 31e of the outer frame 31 and completely fits under the respective leg 31e, 32e, so that there is no obstacle.

Further, since an automatic winding machine for winding the wire rod around the frame as in the prior art is not required, the manufacturing equipment and the like can be held down at low cost, and the loop antenna 1 can be manufactured at low cost.

In addition, according to the above-mentioned embodiment, the flat ribbon cord is used as the wire material, but the present invention is not limited to this, and both ends of the flexible substrate on which a multi-phase pattern as a conductive wire is formed by etching or the like are used as one phase for each pattern. It is also possible to use a coil that is shifted and connected through the collective connecting means. Further, the collective connecting means is not limited to the printed circuit board or the like, and a pair of rectangular connectors including male contacts and female contacts may be used.

[Effect of the Invention] As described above, according to the present invention, both ends of a wire rod in which a plurality of conductive wires are arranged in parallel and mechanically integrated are shifted so that the opposite conductive wires at both ends are displaced by one. The above-mentioned wire material, which is connected in a coiled manner via a connecting plate, is loop-shaped, and is fitted into a loop-shaped frame body having a U-shaped cross section. Since the connecting plate is engaged and held by the engaging portion, the loop antenna can be easily manufactured accurately and easily with a small number of steps.

[Brief description of drawings]

FIG. 1 is an exploded perspective view of a loop antenna showing an embodiment of the present invention, FIG. 2 is a side view showing a part of the loop antenna in cross section, and FIG. 3 is a cross section taken along line III-III in FIG. 4 and 5 are bottom views of the collective connecting means, FIG. 5 is a bottom view of the collective connecting means of another aspect, FIG. 6 is a bottom view of the collective connecting means of another aspect, and FIG. 7 is the same collective connection. FIG. 8 is a perspective view of a connection terminal used for the means, FIG. 8 is a cross-sectional view showing a flat ribbon cord and its manufacturing die, and FIG. 9 is a perspective view of a conventional loop antenna. 1 ... Loop antenna, 10 ... Flat ribbon cord (wire material), 10a, 10b ... Both ends, 11 ... Conductive wire, 20 ... Printed circuit board (connection board), 25 ... Connector (connection board), 30 ... ... Frame, 31e, 32e ... Legs, 31f, 32f ... Notches (engagement parts).

Claims (1)

(57) [Scope of utility model registration request] 1. A connecting plate is formed so that both ends of a wire rod in which a plurality of conducting wires are arranged in parallel and are mechanically integrated are displaced from each other by one by one, and the opposing conducting wires at both ends are coiled. Connected via the above, the above wire material that is formed into a loop shape is fitted into a frame body that has a U-shaped cross section and is formed into a loop shape, and the frame body is provided with a leg portion integrally. A loop antenna comprising an engaging portion for engaging and holding a plate.