JPH0354413Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field of the Invention] This invention relates to an antenna device suitable for portable radios/televisions, etc., and particularly to a jacket antenna that can be attached to a jacket or the like.

"Prior Art and Its Disadvantages" Conventional portable radio receivers (or television receivers) etc. are equipped with antenna means such as rod antennas so that radio (or television) broadcast waves can be received well. , or can be attached. However, with this type of antenna means,
Its lack of maneuverability was a problem.

Therefore, in recent years, radio receivers (hereinafter referred to as antenna/ (referred to as earphone cord-combined radio receivers) are becoming popular. However, the antenna means using earphone cords still poses a problem, as it is difficult to receive shortwave broadcasts, FM broadcasts, television broadcasts, etc. particularly in places where the electric field strength is weak, such as inside a train or in a reinforced concrete house.

[Purpose of the invention] This invention was made in view of the above circumstances.
To provide a jacket antenna which enables good reception of broadcast waves even in places with weak electric field strength while ensuring mobility by attaching the antenna body to a jacket or the like.

``Key Points of the Invention'' In this invention, a mounting means for attaching the antenna body to a jacket or the like is provided, so that the antenna body can be used by being attached to a jacket or the like.

[Embodiment of the invention] An embodiment of the invention will be described below with reference to the drawings.

FIG. 1 shows the structure of a jacket antenna 10 according to an embodiment of this invention, and 11 is an antenna body. The antenna main body 11 is formed of, for example, a flexible conducting wire into a substantially loop shape. One end of a feeder line 12 is connected to (the feeding point of) the antenna body 11, and the other end of the feeder line 12 is connected to a radio receiver, a television receiver, etc.
A connection plug 13 connectable to an antenna connection terminal (antenna connection jack) such as a connection adapter 30 shown in the figure is connected. Antenna body 11
includes a plurality of attachment parts 14 having buttons that can be attached to, for example, the lining of a jacket or coat,
It is provided movably (or may be fixed).

The jacket antenna 10 shown in FIG.
As shown in the figure, it is used by being mounted on a jacket 21, for example. That is, the jacket antenna 10 is
The antenna main body 11 is attached to the jacket 2 by means of attachment parts 14, 14, . . . provided on the main body 11.
By being attached to the lining of 1 in a loop shape,
It is mounted on the jacket 21. In order to make this attachment possible, in this example where a button is used as the attaching portion 14, it is necessary to form a buttonhole in a corresponding portion of the lining of the jacket 21.

Now, in order to use the jacket antenna 10 while wearing the jacket 21, for example,
Radio receiver 23 stored in pocket 22 of 1
antenna connection jack (antenna connection terminal)
Then, the connection plug 13 of the jacket antenna 10 can be inserted and connected. In this case, since the jacket antenna 10 operates as a normal loop antenna, a high gain can be stably obtained, and FM broadcasts can be received well even in places where the electric field strength is weak, such as inside a train. Moreover, since the jacket antenna 10 is mounted on the jacket 21, it is highly maneuverable. Furthermore, since the antenna body 11 attached to the lining of the jacket 21 is made of a flexible conductive wire, it is highly flexible.
It follows the movements (bending, twisting, etc.) of the wearer of Jacket 21 and does not cause any discomfort. Further, since the jacket antenna 10 (the antenna main body 11 thereof) is detachable from the jacket 21, no inconvenience occurs when cleaning the jacket 21.

However, if the radio receiver 23 in FIG. 2 is of the antenna/earphone cord combination type, it does not have a dedicated antenna connection jack.
Unable to connect to. Furthermore, if the connection plug 13 of the jacket antenna 10 is directly connected to the earphone connection jack (earphone connection terminal), it becomes impossible to connect the earphone, which is inconvenient.

Therefore, in this embodiment, a connection adapter 30 is provided that eliminates the above-mentioned inconvenience. As shown in FIG. 3, this connection adapter 30 includes a connection plug 31 that can be connected to an earphone connection jack of an antenna/earphone combination radio receiver 23 or the like.
, an earphone connection jack 32 , and an antenna connection jack 33 . When using the connection adapter 30, insert the connection plug 31 into the earphone connection jack of the radio receiver 23, and connect the earphone connection jack 3 to the earphone connection jack 30.
2, and the connecting plug 13 of the jacket antenna 10 shown in FIG. 1 is inserted into the antenna connecting jack 33. In this state, the connection adapter 30 connects the connection plug 13
The antenna input signal (high frequency input signal, received signal) from the jacket antenna 10 is input to the
The connection plug 31 supplies the earphone connection jack of the radio receiver 23, while the radio receiver 2
The audio output signal (low frequency output signal, earphone input signal) from the earphone connection jack 3 is supplied to the earphone connection jack 32 via the connection plug 31. That is, the connection adapter 30 has a function of separating the antenna input signal and the audio output signal.

The connection adapter 30 incorporates a duplexer 40 shown in FIG. 4 in order to realize the above-mentioned demultiplexing function.
In the duplexer 40, a capacitor 41 is connected between one end (center conductor) of the connection plug 31 and the antenna connection jack 33, and a capacitor 41 is connected between one end (center conductor) and the other end (outer conductor) of the earphone connection jack 32. A capacitor 42 is connected. Furthermore, a high-frequency choke coil 43 is connected between the common connection point between the capacitor 41 and the above-mentioned one end of the connection plug 31 and the common connection point between the capacitor 42 and the above-mentioned one end of the earphone connection jack 32. The other ends of the earphone connection jack 32 and the antenna connection jack 33 are commonly connected. However, the capacitor 41,
42 and the high-frequency choke coil 43 constitute a π-type low-pass filter.

In the duplexer 40 of FIG. 4, the antenna input signal guided to the antenna connection jack 33 is coupled by a capacitor 41 to the earphone connection jack of the radio receiver 23, which is connected to the connection plug 31. Furthermore, the capacitor 42 prevents leakage of the antenna input signal. Then, by the high frequency chiyoke coil 43,
Earphone connection jack 32 for the above antenna signal
(from the earphones) is blocked.

By using the connection adapter 30 that incorporates the duplexer 40 described above, the received signal, which is a stable high-level antenna input signal from the jacket antenna 10 shown in FIG. can be supplied to the radio receiver 23 (earphone connection jack) with high efficiency. That is, the duplexer 40 built into the connection adapter 30 prevents the received signal from flowing into the earphone side, and also prevents the audio output signal from flowing into the jacket antenna 1.
Since the flow to the 0 side is prevented, signal transmission can be carried out extremely efficiently. Furthermore, when using the connection adapter 30, it is also possible to apply a high-gain antenna such as a Yagi antenna for good reception of FM broadcasts or TV broadcasts (on portable TVs) indoors, such as in reinforced concrete houses. It is.

FIG. 5 shows a modification of the connection adapter 30 shown in FIG. 3. In FIG. In the same figure, 31' is a connection plug;
2' is an earphone connection jack, and 33' is an antenna connection jack. In the connection adapter shown in FIG. 5, unlike the one shown in FIG. 3 in which the earphone connection jack 32 and the antenna connection jack 33 are arranged side by side, the earphone connection jack 32' and the antenna connection jack 33' are arranged side by side. are provided in directions perpendicular to each other. The user can select either the connection adapter 30 or 30' depending on the insertion direction of the connection plug 13 of the jacket antenna 10. The configuration of the duplexer built in the connection adapter shown in FIG. 5 is the same as that of the connection adapter 30.

This invention has been explained above with examples,
This invention is not limited to the embodiments described above, and can be modified in various ways without changing the gist of the invention. For example, the jacket antenna 10
The antenna is not limited to a loop antenna, but may be a tablet antenna, a held antenna, or the like, as long as it can be attached to a jacket or the like using an appropriate attachment means. Furthermore, the means for attaching the antenna to the jacket is not limited to buttons; for example, hooks,
Furthermore, it may be a surface fastener or the like. Furthermore, the antenna may be attached to clothing such as a coat, in addition to a jacket. It is also possible to attach the antenna according to this invention to, for example, a bag.

[Effects of the invention] According to this invention, by attaching the antenna body to a jacket, etc., it is easy to connect the antenna from the outside to a broadcast wave receiver such as a portable radio receiver or a portable television receiver. This allows for good reception of various broadcast waves even in places with weak electric field strength while ensuring mobility.

[Brief explanation of the drawing]

FIG. 1 is a diagram showing the configuration of a jacket antenna according to an embodiment of the invention, FIG. 2 is a diagram showing an example of how the jacket antenna of FIG. 1 is attached to a jacket, and FIG. A diagram showing the external appearance of the connection adapter 30, FIG. 4 is a circuit configuration diagram of a duplexer built in the connection adapter 30, and FIG. 5 is a diagram showing the connection adapter 3.
It is a figure which shows the modification of 0. 10...Jacket antenna, 11...Antenna body, 12...Feeding line, 13, 31, 31'...
...Connection plug, 14, 14...Mounting part, 21...
...Jacket, 23...Radio receiver, 30...
Connection adapter, 40... duplexer.

Claims (1)

[Scope of utility model registration request] An antenna, a mounting means for attaching the antenna body of the antenna to a jacket, etc., and an antenna/
A connection that has a connection plug that can be connected to the device side earphone connection jack of a device such as an earphone cord dual-purpose radio receiver, an antenna side earphone connection jack for connecting the earphone, and an antenna connection jack for connecting the above antenna. An adapter that splits an antenna input signal from the antenna that is guided to the antenna connection jack to the connection plug side, and that is also guided from the earphone connection jack on the device side via the connection plug that is connected to the same jack. A jacket antenna characterized by comprising a connection adapter having a built-in duplexer that demultiplexes the audio output signal to the earphone connection jack on the antenna side.