JPH09116323A - Ground connection plug and antenna connection jig using the plug - Google Patents

Abstract

PROBLEM TO BE SOLVED: To use an earphone jack, etc., as a ground terminal for a receiver with no break of voices by providing an electrode having such length that touches the ground contact and does not touch the signal line contact of a connection jack when the electrode is inserted into the connection jack. SOLUTION: A ground connection plug 10 contains an electrode 2 which is connected to a lead wire 3, and the electrode 2 has such length that touches the ground contact 6 and does not touch the signal line contact 7 of an earphone jack 75 when the electrode 2 is inserted into the jack 75. Therefore, the electrode 2 never pushes up the contact 7 when the plug 10 is inserted into the jack 75. Thus an interlock contact 8 is not opened and therefore a speaker circuit using the contact 8 is not separated. Then only the ground side of the jack 75 can be taken out. Furthermore, a small diameter part 9 is prepared at the contact position of the ground contact of the electrode 2. Thus the contact 6 is engaged with the part 9 in a clip type, so that the drop-off of the plug 10 can be prevented.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a grounding plug and an antenna connecting jig using the same.

[0002]

2. Description of the Related Art In recent years, due to the development of liquid crystal technology, a large number of small vehicle-mounted or portable liquid crystal televisions are commercially available. Many of these liquid crystal televisions are of a type that receives a broadcast by a built-in rod antenna in consideration of portable use.

[0003]

However, even in some small liquid crystal televisions or televisions of the small CRT system, only the built-in rod antenna can be used as an antenna, and no external antenna connection terminal is prepared. , There are models that only have an earphone jack as a terminal.

In such a model, when the receiver ground is connected to the ground to improve the reception condition, there is no dedicated terminal for connecting the ground, and therefore the ground side of the earphone jack is connected. Even if it is used, most of the models are usually designed so that the sound from the speaker is cut off when the earphone plug is inserted into the earphone jack, and such a use causes a problem.

Therefore, a first object of the present invention is to provide a grounding plug which can utilize an earphone jack or the like as a grounding terminal without causing the inconvenience of sound being cut off in a receiver.

A second object of the present invention is to provide an antenna to which an external antenna can be easily connected even when the model does not have a dedicated external antenna connection terminal when the reception condition is poor and the external antenna is desired to be used. It is to provide a connecting jig.

Conventionally, there has been proposed an external antenna connection structure for a communication device in which an external antenna is directly sandwiched by a U-shaped plate-like elastic member provided at one end of the external antenna to connect to the external antenna (actual development of Shokai). 62-3102 reference), in this configuration, when connecting the external antenna with a coaxial cable,
There was a problem that the ground side was not connected to anything and the performance of the external antenna could not be fully utilized.

[0008]

In order to achieve the above object, the grounding connection plug of the present invention is inserted into a connection jack provided in equipment such as a broadcast receiver, and the grounding of the connection jack is carried out. The electrode having a length that contacts the side contact but does not contact the signal line side contact is provided. Also,
In the electrode of the ground connection plug, a small diameter portion is provided at a portion where the ground side contact of the connection jack contacts.

When the grounding plug having the above structure is inserted into an earphone jack usually provided in a receiver or the like, its electrode is connected to the earth side contact of the earphone jack, but not to the signal line side contact. Since there is no contact, the ground side can be pulled out without cutting off the sound from the speaker. Further, in the case where the electrode has a small diameter portion at the portion in contact with the ground side contact, the ground side contact is click-engaged with the small diameter portion, and the plug is prevented from easily falling off.

Further, the antenna connecting jig of the present invention is
The grounding plug, a fixing means for fixing the lead wire to the rod antenna incorporated in the device, and the lead wire extending from the fixing means are connected to the core side of the coaxial cable connected to the unbalanced antenna, and grounded. The coaxial cable connecting terminal connects the conductor extending from the electrode of the connecting plug to the shield side of the coaxial cable.

According to the antenna connecting jig having the above structure,
The core side of the external antenna can be connected to the rod antenna of the receiver, that is, the antenna input of the tuner in the receiver, and the ground side can be connected to the ground of the receiver, so even in a receiver without an external antenna terminal, The reception condition can be improved by fully utilizing the performance of the external antenna.

[0012]

Embodiments of the present invention will be described below in detail with reference to the drawings. (Embodiment 1) FIG. 1 shows an embodiment of a ground connecting plug of the present invention, and FIG. 2 shows a state in which the ground connecting plug is connected to an earphone jack. is there. Note that FIG. 3 shows a conventional earphone plug for comparison.

The grounding plug 1 has an electrode 2 connected to a conductor 3, and when inserted in an earphone jack 5,
The electrode 2 has a length that contacts the earth-side contact 6 of the earphone jack 5, but does not contact the signal line-side contact 7. Reference numeral 8 is an interlocking contact.

Therefore, when the grounding plug 1 is inserted into the earphone jack 5, the electrode 2 contacts the signal line side contact 7
Since there is no pushing up, there is no opening of the interlocking contact 8,
There is no disconnection of the speaker circuit using this contact. Then, only the ground side of the earphone jack 5 can be taken out.

FIG. 4 shows a modification of FIG. 1, in which the electrode 2 of the grounding plug 10 is provided with a small-diameter portion 9 at the portion where the grounding side contact of the connecting jack comes into contact. Is. With such a configuration,
As shown in FIG. 5, when the grounding plug 10 is inserted into the earphone jack 5, the grounding side contact 6 has a small diameter portion 9
Since it is engaged in a clip manner, it is possible to prevent the ground connection plug 10 from easily falling off.

(Embodiment 2) Next, FIG. 6 shows an embodiment of an antenna connecting jig of the present invention.
In FIG. 6, 10 is the grounding plug shown in FIG. 4, 12 is a clip for fixing the conductor 11 to the rod antenna incorporated in the device, and 13 is a conductor extending from the clip 12.
11 is connected to the core side of the coaxial cable connected to the unbalanced antenna, and the conductor 3 extending from the electrode of the grounding plug 10 is connected to the shield side of the coaxial cable at the F terminal for coaxial cable connection. is there.

FIG. 7 shows a state in which an external antenna (not shown) is connected to the rod antenna 14 of the receiver using the antenna connecting jig shown in FIG. Clip the rod antenna 14 with the clip 12, and connect the grounding plug 10
Is inserted into the earphone jack 5 of the receiver. The coaxial cable 16 from the external antenna is connected to the F terminal 13 connected to the clip 12 and the grounding plug 10 by the conductors 11 and 3.

By connecting in this way, the core side of the external antenna is connected to the rod antenna 14 of the receiver, that is, the antenna input of the tuner in the receiver, and the shield side is connected to the ground of the receiver, thus Even in a receiver without an external antenna terminal, the receiving condition can be improved by fully utilizing the performance of the external antenna.

The jack of the receiver into which the grounding plug is inserted is not limited to the earphone jack as long as it is connected to the ground of the receiver.
It may be an input terminal. Since the grounding plug of the present invention takes out only the ground of the receiver without cutting off the sound from the speaker, it is very suitable for use as a jig for antenna connection.

[0020]

As described above, according to the grounding plug of the present invention, the grounding plug can be inserted into a connecting jack of a device such as a broadcast receiver without interrupting the sound from the speaker of the receiver. Can only withdraw. Further, by providing the electrode of the grounding plug with a small diameter portion, it is possible to prevent the plug inserted into the jack from being accidentally dropped.

Further, according to the antenna connecting jig of the present invention, the antenna cable can be easily connected even in a model such as a liquid crystal small television which does not have a dedicated external antenna connecting terminal, so that the external antenna There is an effect that the function can be fully utilized and the reception state can be improved.

[Brief description of the drawings]

FIG. 1 is an external view of a ground connection plug according to an embodiment of the present invention.

FIG. 2 is a diagram showing a state in which the grounding plug according to the embodiment of the present invention is inserted into an earphone jack.

FIG. 3 is an external view of a conventional earphone plug.

FIG. 4 is an external view showing a modified example of FIG.

FIG. 5 is a diagram showing a state in which the modified example shown in FIG. 4 is inserted into an earphone jack.

FIG. 6 is a diagram showing an antenna connection jig according to an embodiment of the present invention.

FIG. 7 is a diagram showing a use state of the antenna connection jig according to the embodiment of the present invention.

[Explanation of symbols]

1,10 ... Ground connection plug, 2 ... Electrode, 3,11 ...
Conductor, 5 ... Earphone jack, 6 ... Earth side contact,
7 ... Signal line side contact, 8 ... Interlocking contact, 9 ... Small diameter part,
12 ... Clip, 13 ... F terminal for coaxial cable connection,
14 ... Rod antenna, 16 ... Coaxial cable.

Claims (3)

[Claims] 1. An electrode having a length which is inserted into a connecting jack provided in a device such as a broadcast receiver and which contacts a ground side contact of the connecting jack but does not contact a signal line side contact. A plug for earth connection characterized by having. 2. The ground connection plug according to claim 1, wherein the electrode has a small-diameter portion at a portion where the ground-side contact of the connection jack contacts. 3. An electrode having a length which is inserted into a connection jack provided in a device such as a broadcast receiver and which contacts a ground side contact of the connection jack but does not contact a signal line side contact. The earth connecting plug, the fixing means for fixing the conducting wire to the rod antenna, and the conducting wire extending from the fixing means are connected to the core side of the coaxial cable connected to the unbalanced antenna, and the earth connecting plug is provided. A coaxial cable connecting terminal for connecting a conductor extending from the electrode to the shield side of the coaxial cable, and connecting an external antenna to a device such as a broadcast receiver.