JPH055701Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field The present invention relates to a portable receiver, and particularly to a portable receiver such as a portable radio receiver or television receiver that is used by connecting a headphone.

In portable receivers, reception sensitivity tends to be a problem due to constraints on various conditions. On the other hand, it is also necessary to have good portability.

Conventional technology A conventional portable receiver that is used by connecting headphones has a structure in which a dedicated external antenna jack is provided separately from the headphone jack, which increases the number of jacks and makes it difficult to miniaturize the receiver. .

Therefore, as shown in FIG. 6, a portable receiver is currently being commercialized in which the cord of a headphone can be used as an antenna, eliminating the need for an external antenna jack and reducing the size accordingly.

In the figure, reference numeral 1 denotes the receiver body, which has a headphone jack, but is not provided with an external antenna jack.

3 is a reception tuned detection circuit, and 4 is a low frequency amplification circuit. The output side of this circuit 4 is connected to the contact pieces 5, 6 of the headphone jack 2.

7 is an antenna input circuit, which is branched from the circuit connecting the circuit 4 and the contact piece 6;
A capacitor C is provided in the middle and connected to the input side of the circuit 3.

8 is a power supply, and SW is a power switch.

Reference numeral 13 denotes a high frequency choke circuit, which is inserted between the antenna circuit 7 and the return line of the power source 8.

9 is a headphone, 10 is a cord, and 11 is a plug.

When the plug 11 is connected to the jack 2, the cord 10 is connected to the antenna input circuit 7 and used as an antenna wire.

Problems to be Solved by the Invention In actual usage of the portable receiver described above, the receiver body 1 is placed in a pocket or an accessory, and the headphone 4 is worn on the head. Cord 10 is designed to fit the body without unnecessary slack,
It is difficult to move this freely.

When this cord 10 is used as an antenna, the result is similar to that of an antenna fixed to the user's body, and there is no directional freedom of the antenna, so in order to obtain good reception sensitivity, There was a problem in that the user had to change the direction of his/her body and was forced to lie on both sides.

Furthermore, when using the device while walking or in a crowded car, there is a problem in that good reception sensitivity cannot be obtained because the user cannot freely change the orientation of the user's body.

The present invention aims to provide a portable receiver that can maintain good reception sensitivity by connecting a separate antenna to a headphone jack and changing the position of the antenna in various ways without changing the direction of the body. purpose.

Means for Solving the Problems The present invention provides a portable receiver having a structure in which an antenna input circuit is connected to a headphone jack, and is used by connecting a headphone to the headphone jack. The headphone jack has a linear or rod-shaped antenna that is additionally connected to the headphone.

Function: Although the receiver is configured without an external antenna jack, a dedicated antenna can be provided, and receiving sensitivity can be improved by operating this antenna.

Embodiment FIG. 1 shows an embodiment of the portable receiver of the present invention. In the figure, the same parts as those shown in FIG. 6 are designated by the same reference numerals, and the explanation thereof will be omitted.

The receiver main body has the same configuration as the receiver main body 1 described above, and has a jack 2 for a smartphone, but is not provided with a jack for an external antenna, and an antenna input circuit 7 is connected to the circuit between the circuit 4 and the jack 2. It is formed by branches.

A headphone cord 20 has a headphone 9 at one end and a plug 21 at the other end. code 20
There are two wires 22 and 23 inside, one wire 22 is connected to the tip 24 of the plug 21, and the other wire 23 is connected to the sleeve 25 of the plug 21.
It is connected to.

26 is an antenna wire, which is pulled out from the plug 21 together with the cord 20.
One end of the electric wire 27 inside the antenna wire 26 is connected to the plug 21
It is connected to the sleeve 25 of.

The antenna wire 26 has approximately the same length as the headphone cord 20 (approximately 1.5 to 2 m), and has 2 to 3 m in the middle.
It has a stopper 28 at a location, and a clip 29 or hook 30 made of an appropriately shaped insulating material at the tip.

A portable receiver is constructed by putting the receiver body 1 in a pocket or the like, attaching the headphone 4 to the head, inserting the plug 21 into the jack 2, letting the antenna wire 26 slack as appropriate and letting it lie along the body, and then attaching the tip to the clip 29.
Use it by fixing it to the appropriate place on your clothes.

The antenna wire 26, unlike the headphone cord 20, can take any position.

If you are using it in situations where it is difficult to freely change your body direction, such as while walking or in a crowded car, and the reception condition becomes poor, you can keep the reception condition in good condition by changing the position of the antenna wire 26 in various ways. can be restored to. Therefore, the user can maintain good reception conditions by appropriately changing the position of the antenna wire 26 as needed, without having to take the trouble to change the orientation of the user's body.

Note that the electric wire 23 and antenna wire 26 inside the headphone cord 20 function as an antenna.
The effective length of the antenna wire is longer than the conventional one,
The reception condition is also improved in this respect.

When the receiver is not in use, fit the stopper 28 to the headphone cord 20 and connect the antenna wire 2.
6 along the headphone cord 20, the antenna wire 26 is not unnecessarily tangled and can be easily organized together with the headphone cord 20.

Next, another embodiment of the present invention will be described with reference to FIG. 2 and subsequent figures. In each figure, the same parts as those shown in FIGS. 1 and 6 are given the same reference numerals.

FIG. 2 shows a configuration in which the antenna wire 26 is provided extending not from the plug but from the plug adapter 40. The plug adapter 40 has contact pieces 41, 4
2, and a plug portion 44. The contact piece 41 is connected to the tip 45 of the plug part 44.
It is electrically connected to the contact piece 42 and the electric wire 2.
7 are both electrically connected to the sleeve 26.

The portable receiver is used by inserting the plug portion 44 of the plug adapter 40 into the headphone jack 2 shown in FIG. 1, and inserting the plug 11 of the headphone 9 shown in FIG. 6 into the jack portion 43.

Plug adapter 40 with this antenna wire 26
If you use the headphone 9 that you have been using,
Moreover, the reception condition can be improved by changing the position of the antenna wire 26 as in the above case.

FIG. 3 shows a first modification of the plug adapter shown in FIG.

This plug adapter 50 has a structure in which a jack part 51 and a plug part 52 are connected by a cord 53, and the antenna wire 26 is drawn out from the jack part 51.

This plug adapter 40 is convenient to use when it is desired to extend the headphone cord and when it is desired to move the antenna wire 26 away from the receiving location.

FIG. 4 shows a second modification of the plug adapter shown in FIG.

The plug adapter 60 has two jack parts 61,
62 integrally.

A plug 64 is provided at one end of the antenna wire 26.

The portable receiver is constructed by inserting the plug part 63 of the plug adapter 60 into the headphone jack 2 shown in FIG. 1, inserting the plug 11 of the headphone 9 shown in FIG. use.

By unplugging the plug 64 and plugging in the plug 66 of another headphone 65, two people can listen.

FIG. 5 shows a third modification of the adapter shown in FIG.

This plug adapter 70 has a jack portion 71 and a plug portion 72, and a rod antenna 73 is provided on the jack portion 71 instead of an antenna wire.

The portable receiver is used by inserting the plug portion 72 of the plug adapter 70 into the headphone jack 2 shown in FIG. 1, and inserting the plug 75 of the headphone 74 into the jack portion 62. This is useful when the antenna wire cannot be routed freely.

For each adapter shown in Figures 2 to 5, if you are using a portable receiver in a strong electric field area and no antenna wire is required and reception is possible only with the built-in ferrite bar antenna, remove the plug adapter. The headphone plug may be directly inserted into the headphone jack 2 for use.

Further, the plug adapter 60 shown in FIG. 4 may have a configuration in which three or more jack portions are provided.

Effects of the Invention As explained above, the portable receiver of the present invention has a structure in which a linear or rod-shaped antenna is connected to the receiver body in addition to the headphone. Although the receiver does not have a jack, it can be equipped with a dedicated antenna, and compared to a configuration that uses a headphone cord as an antenna, which is difficult to change its position, it can be used by changing the antenna position in various ways. It has the advantage that the receiving condition can be improved without the person having to take the trouble to change the direction of his/her body.

[Brief explanation of the drawing]

FIG. 1 is a diagram showing an embodiment of the portable receiver according to the present invention, FIG.
The figure shows the first modification of the plug adapter in Figure 2, Figure 4 shows the second modification of the plug adapter in Figure 2 and how to use it, and Figure 5 shows the second modification of the plug adapter in Figure 2.
A diagram showing a third modification of the plaque adapter in the figure and how to use it, and FIG. 6 is a diagram showing an example of a conventional portable receiver. 1...Receiver body, 7...Antenna input circuit,
20...Headphone cord, 21...Plug, 2
6... Antenna wire, 27... Electric wire, 28... Stopper, 29... Clip, 30... Hook, 40,
50, 60, 70...Plug adapter, 41, 4
2...Contact piece, 43, 51, 52, 61, 62,
71... Jack part, 44, 52, 63, 72...
...Plug part, 45...Tip part, 46...Sleeve, 73...Rod antenna.

Claims (1)

[Claims for Utility Model Registration] (1) A portable receiver that is configured such that an antenna input circuit is connected to a headphone jack, and is used by connecting a headphone to the headphone jack, 1. A portable receiver comprising a linear or rod-shaped antenna which is additionally connected to the headphone in a portable receiver. (2) The portable receiver according to claim 1, wherein the antenna is an antenna wire extending from the headphone plug separately from the headphone cord. (3) The antenna is provided extending from the jack part of a plug adapter which integrally includes a plug part connected to the headphone jack and a jack part to which the headphone plug is connected. A portable receiver according to claim 1 of the patent registration claim.