JPH0644187Y2 - Radio receiver - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION A. Field of Industrial Application The present invention relates to a radio receiver to which an external antenna device can be connected.

B. Outline of the Invention The present invention relates to a radio receiver in which a radio receiver body including a connection jack and a rod antenna is connected to an external antenna device, and the connection plug and the radio receiver body are housed in the radio receiver body. A controller device including a contactor that comes into contact with the tip of the rod antenna, the controller device being mechanically coupled to the radio receiver main body by engagement of the connection plug and the connection jack, and the contactor. By providing electrical connection by contact with the tip of the rod antenna, it is possible to provide a radio receiver in which an external antenna device can be connected without providing an external antenna terminal on the radio receiver main body. It is a thing.

C. Conventional Technology Conventionally, as a radio receiver, there has been proposed a radio receiver configured so as to improve the receiving capability by connecting an external antenna device to the main body of the radio receiver.

In such a radio receiver, the radio receiver main body is provided with a bar antenna for receiving a medium wave and a rod antenna for receiving a short wave and an FM wave. The external antenna device is provided with a rod antenna that is larger than the rod antenna provided in the radio receiver body. In addition, the external antenna device,
An amplifier for amplifying the radio wave signal received by the rod antenna is incorporated.

The radio signal received and amplified by the external antenna device is sent to the receiving section of the radio receiver main body via the signal cable and the external antenna terminal provided on the radio receiver main body.

In this way, the radio receiver main body is supplied with a radio wave signal stronger than the radio wave signal received by the antenna provided in the radio receiver main body, for example, because it is located in a place remote from the broadcasting station. As a result, a good reception state is secured even when the received radio wave is weak.

D. Problems to be Solved by the Invention By the way, when a radio receiver including the above-mentioned external antenna device is used, the radio receiver main body is replaced by a speaker device provided in the radio receiver main body. The external antenna device is placed in the vicinity of the operator so that the operation unit for listening to the sound and adjusting the volume and the receiving frequency provided in the radio receiver body can be easily operated. Is placed in a place with good reception of radio waves, such as at a window.

Therefore, there is an inconvenience that the operation for adjusting the reception state by the external antenna device, such as the adjustment of the amplifier built in the external antenna device, cannot be performed by hand.

In order to eliminate the above-mentioned inconvenience and to facilitate the adjustment operation of the external antenna device, it is conceivable to provide the radio receiver main body with an operation unit for adjusting the external antenna device. However, it is not necessary when using only the radio receiver main body without using the external antenna device. Providing the operation unit and the external antenna connection terminal on the radio receiver main body reduces the size and cost of the radio receiver main body. There is a problem in trying.

Therefore, the present invention is proposed in view of the above-mentioned circumstances, and an external antenna device can be easily provided without providing an operation unit for the external antenna device, an external antenna device connection terminal, or the like in the radio receiver main body. Connected,
It is an object of the present invention to provide a radio receiver in which operations related to the external antenna device can be easily performed near the radio receiver main body.

E. Means for Solving the Problems In order to solve the above problems and achieve the above objects, a radio receiver according to the present invention is a radio receiver main body including a connection jack and a storable rod antenna, and an external antenna. A controller device provided with a connection plug connected to a signal cable from the device and connected to the connection jack, and a contactor that contacts the tip of the rod antenna in a state of being housed in the radio receiver body. Prepare,
The controller device is mechanically coupled to the radio receiver body by the engagement of the connection plug and the connection jack, and is electrically connected by the contact between the contact and the tip of the rod antenna. It is characterized by

F. Action In the radio receiver according to the present invention, since the controller device to which the signal cable from the external antenna device is connected can be provided with the operation unit related to the external antenna device, the operation related to the external antenna device is performed by the radio reception. It can be done near the machine body. Further, since the controller device can be easily mounted without providing a means for mounting the controller device on the radio receiver main body, it is easy to reduce the size and cost of the radio receiver main body. Becomes

G. Embodiment Hereinafter, a specific embodiment of the present invention will be described with reference to the drawings.

The radio receiver according to the present invention includes a radio receiver body 10 and a controller device 20 as shown in FIGS.
And an external antenna device 40.

The radio receiver body 10 is a retractable rod antenna 12 that can be housed in a housing 11 of the radio receiver body 10.
And a bar antenna 13 built in the housing 11. The rod antenna 12 is for receiving short waves and FM waves, and the bar antenna 13 is for receiving medium waves. The radio signal received by each of the antennas 12 and 13 is, as shown in FIG. 3, sent to a receiving unit 14 including a predetermined channel selecting device, an amplifier, etc., and is output from a speaker device 15 as sound.

A connection jack 16 is provided on the radio receiver body 10. The connection jack 16 is, for example, for outputting an acoustic signal output from the receiving unit 14 to the outside as an electric signal, and includes a grounding terminal 16a and a signal terminal 16b. The grounding terminal 16a is grounded to the chassis of the radio receiver body 10, and the signal terminal 16b is connected to the signal output terminal of the receiving section 14. The connection jack 16 is provided on the housing 11 and the rod antenna 12
Is stored in the housing 11, the rod antenna 12
Is provided on the same side as the side facing the outside.

Further, the radio receiver main body 10 is provided with an operation unit 17 for operating the state of tuning and amplification by the reception unit 14. The operation unit 17 is composed of a plurality of predetermined key switches and the like. Further, a display unit 18 including, for example, a liquid crystal display plate is provided, and the reception frequency set by the operation unit 17 and other predetermined information are displayed.

Next, as shown in FIG. 1, the controller device 20 includes a contact 22 and a coil 23 in a controller housing 21. The contactor 22 has its tip exposed to the outside through the bottom of the recess 24 provided in the controller housing 21, and is elastically urged outward by the coil spring 25. The coil 23 has a ferrite core 23a.

Further, the controller device 20 includes an external antenna jack 26 to which an external antenna plug 42 provided at the tip of the signal cable 41 from the external antenna device 40 is connected. The external antenna jack 26 includes a grounding terminal 26a and a signal terminal 26b.

Further, the controller device 20 has the connection jack
A connection plug 27 connected to 16 and a relay jack 28 are provided. The connection plug 27 includes a ground side terminal 27a and a signal side terminal 27b, and the relay jack 28 includes a grounding terminal 28a and a signal terminal 28b. Above ground terminal
28a is connected to the ground side terminal 27a, and the signal terminal 28a
b is connected to the signal side terminal 27b. The grounding terminal 26a of the external antenna jack 26 is connected to the connection plug 2
7 is connected to the ground side terminal 27a.

The base end of the contact 22 is a band changeover switch.
It is connected to one terminal 29a of 29. Further, one end of the coil 23 is connected to the other terminal of the band changeover switch 29.
29b, the other end is the ground side terminal 2 of the above-mentioned connection plug 27.
It is connected to 7a. As shown in FIG. 3, the fixed terminal 29c of the band changeover switch 29 has a signal terminal 26 of the external antenna jack 26 through a variom 30, a first capacitor 31 and an external antenna power switch 32.
connected to b. Power switch for external antenna 3 above
An input side terminal of a light emitting element 33 such as an LED is connected between 2 and the first capacitor 31, and the ground side terminal of the light emitting element 33 is connected to the ground side terminal 27a of the connection plug 27. Has been done. The variom 30 is operated by an attenuator switch 34 so as to have a predetermined resistance value.

As shown in FIG. 2, the external antenna device 40 includes a base portion 43, and the base portion 43 is provided with a retractable external antenna 44. This external antenna 44
Is larger than the rod antenna 12 of the radio device body 10.

The radio signal received by the external antenna 44 is the third
As shown in the figure, the inner conductor 41b of the signal cable 41 is amplified by the RF amplifier 45 and is passed through the second capacitor 46.
Sent to. The second capacitor 46 and the inner conductor 41
The base terminal of the switching transistor 47 is connected to b through a limiting resistor 48. The collector terminal of the switching transistor 47 is connected to the anodes of a plurality of dry batteries 49 that serve as the power source of the RF amplifier 45, and the emitter terminal is connected to the power supply terminal 45a of the RF amplifier 45. The cathode of the dry battery 49 is connected to the outer conductor 41a of the signal cable 41. The external antenna plug 42 provided at the tip of the signal cable 41 is
It is composed of a ground side terminal 42a and a signal side terminal 42b, and this ground side terminal 42a is connected to the outer conductor 41a, and a signal side terminal 42b.
Is connected to the inner conductor 41b.

As shown in FIG. 2, the dry battery 49 is housed in the bottom of the base 43.
Since 49 is a heavy component among the components of the external antenna device 40, the stability of the base portion 43 is ensured when the external antenna 44 is extended. Further, the signal cable 41 is freely stored in the base portion 43 by being wound around a cable reel 50 which is manually rotated.

In the radio receiver according to the present invention configured as described above, in order to supply the radio signal to the radio receiver main body 10 by using the external antenna device 40, first, the external antenna device 40 is placed at a suitable place. Installed on the above external antenna
Extend 44 to the desired length and set the angle accordingly. At this time, since the center of gravity of the external antenna device 40 is low due to the weight of the dry battery 49, even if the external antenna 44 is tilted, the base portion 43 does not fall down.

Then, the signal cable 41 is pulled out from the base portion 43 by a desired length. The signal cable 41 has a sufficient length, for example, 3 to 4 m or more.

Next, the external antenna plug 42 is connected to the external antenna jack 26 of the controller device 20, and the connection plug 27 of the controller device 20 is further inserted into the connection jack 16. At this time, the rod antenna 12 is
It is stored in the casing 11 in advance.

The controller device 20 is mechanically connected to the radio receiver body 10 by the engagement of the connection plug 27 and the connection jack 16. Further, electrical connection between the connection plug 27 and the connection jack 16 is achieved, and the ground side terminal 27a and the grounding terminal 16a, and the signal side terminal 27b and the signal terminal 16b, respectively. Connected. Therefore, the relay jack 28 can be used as a connection jack having the same function as the connection jack 16. Also, the grounding side terminal 27 of the connection plug 27
The other end of the coil 23 connected to a is grounded to the chassis of the radio receiver body 10. Furthermore, the external conductor 41a of the signal cable 41 and the cathode of the dry battery 49 are connected to the ground-side terminal 27a of the connection plug 27 via the grounding terminal 26a of the external antenna jack 26, and the cathode of the dry battery 49 is the radio receiver. Grounded to chassis of body 10.

By connecting the controller device 20 as described above, the tip of the contact 22 comes into contact with the tip 12a of the rod antenna 12 inserted into the recess 24, and is pressed by the biasing force of the coil spring 25. To be done. Further, the ferrite core 23a of the coil 23 is disposed on the extension line of the bar antenna 13, and the coil 23 and the bar antenna 13 are electromagnetically coupled (so-called MM coupling state). Done.

Then, when the power switch 32 for the external antenna is closed, the RF amplifier 45 is operated by the dry battery 49 by the action of the switching transistor 47, and the voltage of the light emitting element 33 is increased via the limiting resistor 48. When applied, it emits light to indicate that the RF amplifier 45 is operating.

When the RF amplifier 45 is operated, the radio signal received by the external antenna 44 is amplified, and the amplified radio signal is passed through the second capacitor 46 and the inner conductor 41b of the signal cable 41. , To the external antenna power switch 32. At this time, since the power switch 32 for the external antenna is closed, the radio wave signal is transmitted through the first capacitor 31 to the variom.
Sent to 30.

Here, by operating the attenuator switch 34, the resistance value of the variom 30 is adjusted. Then,
The radio wave signal is adjusted to a predetermined signal level according to the strength of the received radio wave and sent to the fixed terminal 29c of the band changeover switch 29.

Then, the radio wave signal is selectively sent to either the contactor 22 or the coil 23 by switching the band changeover switch 29. That is,
When a short wave or an FM wave is received, the radio wave signal is sent to the rod antenna 12 via the contact 22 so as to be supplied to the receiver 14. When receiving the medium wave, the radio signal is sent to the coil.
By sending it to the coil 23, it is sent to the bar antenna 13 electromagnetically coupled to the coil 23 and supplied to the receiving unit 14.

In this way, the radio signal received by the external antenna device 40 and amplified is supplied to the receiving unit 14 of the radio receiver body 10. At this time, in the radio receiver according to the present invention, the grounding of each part is common to the chassis of the radio receiver body 10, so that a good reception state is ensured.

In the radio receiver according to the present invention, an external antenna power switch 32, a band changeover switch 29, and an attenuator switch 34 for operating the external antenna device 40 are provided near the radio receiver body 10. Therefore, even if the external antenna device 40 is installed away from the radio receiver body 10, the external antenna device 40 is not installed.
Can be easily operated.

Further, since the radio receiver main body 10 is not provided with means for exclusively providing connection with the external antenna device 40 and means for operating the external antenna device 40, the radio receiver main body is not provided. It is possible to easily reduce the size and cost of the product.

The connection jack 16 is not limited to a connection jack for outputting the acoustic signal from the receiving unit 14 to the outside, and for example, a signal input jack for inputting an acoustic signal or the radio receiver. It may be an external power input jack or the like to which power for driving the main body 10 is supplied.

Further, the circuit configuration shown in the above-described embodiment can be appropriately changed to another circuit configuration capable of realizing the same operation.

H. Effect of the Invention As described above, in the radio receiver according to the present invention,
The external antenna device is connected via the controller device. The controller device is configured so that it can be easily attached to the radio receiver main body without providing any means for attaching the controller device.

That is, it is not necessary to provide the radio receiver main body with an operation unit for the external antenna device, a connection terminal of the external antenna device, or other means exclusively provided for connection with the external antenna device. Therefore, it becomes easy to reduce the size and cost of the radio receiver body.

Further, the controller device can be provided with an operation unit for the external antenna device, and the operation for the external antenna device can be easily performed near the radio receiver main body.

[Brief description of drawings]

FIG. 1 is a schematic view schematically showing the structure of a radio receiver according to the present invention, FIG. 2 is a perspective view showing the overall appearance of the radio receiver, and FIG. 3 is the radio receiver. 2 is a circuit diagram showing a schematic circuit configuration of FIG. 10 …… Radio receiver body 12 …… Rod antenna 13 …… Bar antenna 16 …… Connecting jack 20 …… Controller device 22 …… Contact 23 …… Coil 26 …… External antenna jack 27 …… Connecting plug 40… ... External antenna device

Claims (1)

[Scope of utility model registration request] 1. A radio receiver main body having a connection jack and a retractable rod antenna, a signal cable from an external antenna device, and a connection plug connected to the connection jack and the radio receiver. And a controller device including a contactor that comes into contact with the tip of the rod antenna in a state of being housed in the main body, wherein the controller device is provided in the radio receiver main body by engagement of the connection plug and the connection jack. A radio receiver which is mechanically coupled and electrically connected by contact between the contact and the tip of the rod antenna.