JPH06112773A - Card type high frequency equipment - Google Patents

Abstract

PURPOSE:To provide a card type electronic tuner which is loaded to the main body of an equipment to receive the images and the voices of a TV like an IC memory card with regard to such an equipment as a personal computer that does not always require a tuner. CONSTITUTION:A card type case 2 contains a flexible substrate 6 which constructs a circuit necessary for a tuner. Then a connector 8 is set along a side of the case 2 and performs the input/output of signals to the substrate 6. The substrate 6 can be bent into a box shape, and a conductor layer is formed on the substrate 6 and connected to the earth to secure the shielding properties. Thus the substrate 6 itself can show the shielding effect.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to high-frequency equipment such as an electronic tuner, and more particularly to improvement of the form of such high-frequency equipment.

[0002]

2. Description of the Related Art Television receivers require a tuner, and as such a tuner, an electronic tuner has been widely used recently. Electronic tuners often include tuner circuitry and channel control circuitry for selectively tuning both UHF and VHF signals.

Such an electronic tuner is built in the main body of the television receiver.

[0004]

At present, as a device having a video display function which is generally used, in addition to the above-mentioned television receiver, for example, a video device such as a personal computer having a display, an information device, and the like. is there. As a matter of course, since a tuner is not built in these video equipment or information equipment, it is impossible to receive the television broadcast and output the video and audio.

However, in many cases, these video equipment and information equipment already have sufficient functions to be used as a television receiver as long as they have a tuner. Therefore, if these video equipment or information equipment can be used as a television receiver as needed, the applications of these equipment can be expanded, and as a result, the commercial value can be increased. it can.

The same applies to other high-frequency equipment such as RF modulators. That is,
For example, when a captured image recorded by a video camera is to be reproduced on a separate monitor device or is to be displayed in real time, normally, the video camera and the monitor device are connected with an RF modulator interposed. Is being done. Regarding the usage state of such an RF modulator, for example, if the RF modulator having a transmission function is built in the video camera, the connection between the video camera and the monitor device as described above becomes unnecessary. However, if the RF modulator is built in the video camera, the portability of the video camera is deteriorated, which is not preferable. Therefore, it is desired that the RF modulator can be attached to the video camera as needed.

[0007] Therefore, it is an object of the present invention to provide a high frequency device such as an electronic tuner or an RF modulator having a form suitable for mounting on a desired device as needed.

[0008]

In order to solve the above-mentioned technical problems, the present invention provides a card type high frequency device.

This card-type high-frequency device has a card-type case, a circuit board housed in the case, and is electrically connected to the circuit board and arranged along one side of the case. And a connector.

The above-mentioned circuit board is made of a flexible board formed into a box shape by being bent, and a conductor layer, which is grounded so as to provide a shielding property, is formed on at least a part of the flexible board. Has been done.

[0011]

According to such a card type high frequency device, for example, a circuit necessary for a desired high frequency device such as an electronic tuner or an RF modulator and a necessary peripheral circuit not provided in a video device or an information device to which the high frequency device is mounted are provided. , It can be stored in a card type case. Input / output of signals can be performed via the connector.

[0012]

Therefore, according to the present invention, a high-frequency device, such as an IC memory card, which has a card type as a whole can be obtained. Such a card type high frequency device is easy to store and carry, and is suitable for handling as an optional accessory for various video devices or information devices. Therefore, unlike the function as a television receiver in a video equipment or an information equipment, it is not necessary to store a function which is not always used in the main body of these equipments. Therefore, it is possible to increase the size and weight of such equipments. It can be prevented.

In order to mount the card type high frequency equipment according to the present invention on a video equipment or an information equipment, a main body of such equipment is provided with, for example, a slot in which the card type high frequency equipment can be mounted In connection with this slot, a connector paired with the connector provided in the card type high frequency device may be provided. If such a slot can be shared with other function cards, it becomes easy to give a plurality of optional functions to one device by switching with a switch, for example.

Further, in the card type high frequency device according to the present invention, a flexible board which is box-shaped by being bent is used as a circuit board. Since the conductor layer that is connected to the ground so as to provide the shielding property is directly formed on this flexible substrate, it is possible to provide a highly reliable shielding effect and most of the special members for providing the shielding property. It becomes unnecessary. In addition, since the circuit formed by using the flexible substrate can be covered with the box-shaped flexible substrate, it is possible to provide a substantially perfect shield effect.

[0015]

Embodiments Embodiments in which the present invention is applied to an electronic tuner will be described below.

FIG. 1 is a perspective view showing the appearance of a card type electronic tuner 1 according to an embodiment of the present invention. Details of the mechanical structure of the card type electronic tuner 1 are shown in FIGS. Further, FIG. 7 shows a block diagram of an electrical configuration included in the card-type electronic tuner 1.

The card type electronic tuner 1 includes a card type case 2. Case 2 is frame 3, frame 3
And an upper cover 4 for closing the upper opening of the frame 3, and a lower cover 5 for closing the lower opening of the frame 3. Such a case 2 is preferably sized substantially the same as a general-purpose IC memory card.

The frame 3 is formed of a molded product made of a synthetic resin having an increased rigidity, such as glass fiber reinforced polyphenylene sulfide, polyethylene terephthalate, polycarbonate and polyamide. Such a frame 3 may be subjected to metal plating, conductive coating, or the like at a necessary portion for the purpose of improving the shield property.

The upper cover 4 and the lower cover 5 are made of a conductive material such as a metal plate in order to exhibit a shielding property. The outer surfaces of the upper cover 4 and the lower cover 5 can be appropriately used as surfaces for printing or the like.

A circuit board is housed in the case 2. The circuit board is composed of a flexible board 6 that is formed into a box shape by being bent. As shown in FIG. 4, required electronic components 7 and connectors 8 are surface-mounted on the flexible substrate 6. The detailed structure of the flexible substrate 6 and its related elements will be described later. A circuit configured on the flexible substrate 6 by the electronic components 7 and the like described above will be described with reference to FIG. 7.

Referring to FIG. 7, the circuit formed on the flexible substrate 6 roughly includes a tuner circuit section 9, a channel control circuit section 10 and a demodulation circuit section 11.
Further, the tuner circuit unit 9 includes a VHF circuit unit 12 and a U unit.
The HF circuit unit 13 is provided.

U input from the U / V signal input terminal 14
The HF / VHF signal is distributed by the distributor 15 and input to the corresponding circuit unit 12 or 13. These circuit units 12 and 13 are respectively provided with a bandpass filter 16
And 17, amplifiers 18 and 19, and bandpass filters 20 and 21.

The channel control circuit section 10 includes a channel control circuit 22, and the output of the channel control circuit 22 is input to local oscillation circuits 23 and 24. The local oscillation signal output from one local oscillation circuit 24 is mixed with the high frequency signal output from the bandpass filter 21 of the UHF circuit unit 13 in the mixing circuit 25, and then amplified in the mixing / amplifying circuit 26. It On the other hand,
The local oscillation signal output from the local oscillation circuit 23 is mixed in the mixing / amplification circuit 26 with the high frequency signal output from the bandpass filter 20 of the VHF circuit unit 12.

The intermediate frequency signal output from the mixing / amplifying circuit 26 is input to the amplifier 28 provided in the demodulation circuit section 11 through the bandpass filter 27. The signal amplified by the amplifier 28 is input to the demodulation circuit 30 via the surface acoustic wave filter 29. In the demodulation circuit 30, the video signal is AM-detected and the audio signal is FM-detected to be demodulated into a video signal and an audio signal, which are applied to the video signal output terminal 31 and the audio signal output terminal 32, respectively. From the demodulation circuit 30,
A sync signal is applied to the sync signal output terminal 33.

Further, the flexible board 6 described above has a power supply voltage terminal 34 for supplying a power supply voltage to the entire circuit formed thereon, and the channel control circuit section 10.
A tuning voltage terminal 35 for supplying a tuning voltage to the channel control circuit section 10,
A clock terminal 36 for supplying a data signal and an enable signal, a data terminal 37 and an enable terminal 38, and a ground terminal 39 are formed.

The terminals 14, 31 to 39 thus formed on the flexible substrate 6 are electrically connected to the corresponding contacts provided on the connector 8.

The tuner circuit section 9, the channel control circuit section 10 and the demodulation circuit section 11 described above are respectively divided into first, second and third areas 4 by broken lines in FIG.
It is located at 0, 41 and 42. As best shown in FIG. 2, the frame 3 is provided with a partition wall 43 so as to separate the first, second and third regions 40, 41 and 42 from each other.

FIG. 3 is a plan view showing the flexible substrate 6 alone. The flexible substrate 6 has a central portion
Two fold lines 44 and 45 extending in parallel are formed at intervals corresponding to the thickness of the frame 3. A portion of the flexible substrate 6 on the left side of the bending line 44 serves as a lower surface portion 46, and various electronic components 7 and connectors 8 are mounted on the upper surface portion thereof as shown in FIG. Further, on the lower surface side of the lower surface portion 46, a conductor layer (not shown) that is grounded is formed over almost the entire surface. The conductor layer on the upper surface side and the conductor layer on the lower surface side are connected by a through hole (not shown). Further, the lower surface portion 46 is provided with a plurality of mounting holes 47 and 48.

The right side of the bending line 45 of the flexible substrate 6 is an upper surface portion 49. The upper surface portion 49 mainly contributes to provide a shielding property, and a conductor layer (not shown) to be grounded is formed on one surface or both surfaces thereof. When the conductor layers are formed on both surfaces, the conductor layers on each surface may be electrically connected to each other by, for example, through holes. Further, a conductor layer other than the conductor layer for grounding, that is, a conductor pattern may be formed on the upper surface portion 49, or a component may be further mounted. Top part 49
The conductor layer or the conductor pattern formed on the bottom surface 46
When it is desired to electrically connect the conductor layer or the conductor pattern formed on the flexible substrate 6, they are integrally connected on the flexible substrate 6.

The upper surface 49 is further provided with a plurality of mounting pieces 5.
0 and 51 and a plurality of rising walls 52-57
Are provided so as to project from the peripheral portion. Also,
A rising wall 58 is formed by cutting and raising in a substantially central portion of the upper surface portion 49. In FIG. 3, these mounting pieces 5
The developed shapes of 0 and 51 and the rising walls 52 to 58 are indicated by broken lines. The mounting pieces 50 and 51 are provided with mounting holes 59 and 60 corresponding to the mounting holes 47 and 48 described above, respectively. Also, the rising wall 5
Contact pieces 61 to 64 are formed on 2, 54, 55 and 58, respectively. The attachment layers 50 and 51, the rising walls 52 to 58, and the contact pieces 61 to 64 are also appropriately formed with a conductor layer for grounding.

The flexible substrate 6 is bent along the bending lines 44 and 45 so that the frame 3 is sandwiched. FIG. 2 shows an intermediate state in the process of attaching the flexible substrate 6 to the frame 3. The frame 3 has a slot 65 through which the mounting pieces 50 and 51 provided on the flexible substrate 6 are inserted.
And 66 and slots 67-70 for receiving riser walls 52-55, respectively. Also,
The frame 3 is provided with screw holes 71 corresponding to both the mounting holes 47 and 59 provided in the flexible substrate 6, and screw holes 72 corresponding to both the mounting holes 48 and 60.

The mounting pieces 50 and 51 are inserted into the slots 65 and 66, respectively, and then further bent so as to be aligned in parallel with the lower surface portion 46. Also, the contact pieces 61 to
64 includes corresponding upstanding walls 52, 54, 55, as shown for contact pieces 62 and 64 in FIG.
It is bent with respect to 58 and is arranged to be parallel to the lower surface portion 46.

After the flexible substrate 6 is mounted so as to sandwich the frame 3 as described above, the lower cover 5 is fixed to the frame 3 as shown in FIG. Screws 73 and 74 are used for this fixing. Screw 73
Penetrates through the lower cover 5, passes through the mounting holes 47 and 59 of the flexible substrate 6, and is screwed into the screw hole 71 of the frame 3. The screw 74 penetrates the lower cover 5 and also has mounting holes 48 and 6 for the flexible substrate 6.
It is screwed into the screw hole 72 of the frame 3 through 0. At this time, the conductor layer for grounding formed on the attachment pieces 50 and 51 contacts the conductor layer for grounding formed on the lower surface portion 46. In addition, the lower cover 5 may further contact the conductor layer for the lower surface portion 46.

Further, in FIG. 5, contact pieces 62 and 64 are provided.
2, the contact pieces 61 to 64 are sandwiched between the frame 3 and the lower surface portion 46, and the respective conductor layers for grounding are in contact with each other. At this contact portion, a structure as shown in FIG. 6 is preferably adopted.

FIG. 6 is an enlarged view of the portion VI of FIG.
As shown in FIG. 6, the flexible substrate 6 is generally
It has a laminated structure including a base film 75 having a conductor layer formed thereon and insulating coverlays 76 and 77 formed so as to cover both surfaces thereof. The coverlays 76 and 77 are removed at the portions where the conductor layer formed on the base film 75 needs to be exposed. In the contact piece 64, the convex portion 78 electrically connected to the exposed portion of the conductor layer is formed, for example, by placing solder. On the other hand, a convex portion 79 corresponding to the convex portion 78 is formed on the lower surface portion 46 by the same method. By forming the protrusions 78 and 79 in this way, electrical connection between the conductor layers can be reliably achieved. From the same reason, the lower surface portion 46 is formed with a convex portion 80 that comes into contact with the lower cover 5, and the upper surface portion 49 is formed with a convex portion 81 that comes into contact with the upper cover 4.

As shown in FIG. 3, a plurality of adjusting holes 82 are provided in the upper surface portion 49 of the flexible substrate 6. These adjustment holes 82 can be adjusted from the outside with respect to the electronic component 7 requiring adjustment, such as a coil, at a stage after the flexible substrate 6 is attached to the frame 3. To

As described above, the flexible substrate 6 is attached to the frame 3, the lower cover 5 is fixed to the frame 3, and then the upper cover 4 is fixed to the frame 3.
Although not shown, the upper cover 4 can be fixed to the frame 3 with an adhesive, a pressure sensitive adhesive, a screw, or the like. In this way, the desired card type electronic tuner 1 is obtained. In the card-type electronic tuner 1, the flexible substrate 6 is bent to have a box-like shape as described above, and the conductor layer formed there provides a shielding property.

In the process of attaching the flexible substrate 6 to the frame 3 described above, bending was performed at various points. Such bending may be performed in advance before the flexible substrate 6 is assembled into the frame 3 to give a habit of bending. As described above, even if the flexible substrate 6 is bent, the slots 65 to 70 can be used because the flexible substrate 6 has flexibility.
There is no hindrance in the step of inserting into, and after insertion, it can naturally return to the original state in which the bending habit is attached.

FIG. 8 is a diagram for explaining another embodiment of the present invention. In FIG. 8, a portion corresponding to the vicinity of the screw 73 in FIG. 4 is enlarged and shown. Therefore, the elements corresponding to the elements shown in the above-mentioned drawings are designated by the same reference numerals, and the duplicate description will be omitted.

Referring to FIG. 8, the lower cover 5 has screws 7
A dish-shaped portion 83 is formed to receive the head portion of No. 3. The dish-shaped portion 83 bends the vicinity of the mounting hole 59 of the mounting piece 50 of the flexible substrate 6 and the vicinity of the mounting hole 47 of the lower surface portion 46, and makes contact between them.

In each of the above-mentioned embodiments, the conductor layer formed on the flexible substrate 6 is usually made of copper foil. Therefore, the conductor layer for providing the shielding property is also provided by the copper foil. As described above, when the conductor layer for providing the shielding property is made of the copper foil, the effect of reducing the loss to the coil can be expected.

Further, in the above-mentioned embodiment, the rising wall 5
2 to 58 are formed so as to extend from the upper surface portion 49 of the flexible substrate 6, but even if they are formed so as to extend from the lower surface portion 46, they extend from both the upper surface portion 49 and the lower surface portion 46, and these rising walls are mutually They may be complemented.

Although not shown in the drawings in the embodiments of the card type electronic tuner 1 described above, a receiving antenna may be externally attached or built in such a card type electronic tuner 1.

The present invention can be applied not only to the electronic tuner but also to other high frequency equipment such as an RF modulator.

[Brief description of drawings]

FIG. 1 is a perspective view showing an external appearance of a card type electronic tuner 1 according to an embodiment of the present invention.

FIG. 2 is a frame 3 included in the card-type electronic tuner 1.
FIG. 9 is a perspective view showing a state in which the flexible substrate 6 is to be incorporated into the.

FIG. 3 is a plan view of a flexible substrate 6.

4 is a sectional view of the card-type electronic tuner 1 taken along a line corresponding to the line IV-IV in FIG.

5 is a sectional view of the card-type electronic tuner 1 taken along a line corresponding to the line VV in FIG.

6 is an enlarged view of a portion VI of FIG.

FIG. 7 is a block diagram showing an electrical configuration included in the card-type electronic tuner 1.

FIG. 8 is a screw 7 for explaining another embodiment of the present invention.
FIG. 3 is an enlarged cross-sectional view showing a configuration around 3.

[Explanation of symbols]

 1 Card type electronic tuner (card type high frequency device) 2 Case 3 Frame 6 Flexible board 8 Connector 44, 45 Bending line 46 Lower surface 49 Upper surface 52-58 Standing wall

Claims (1)

[Claims] 1. A card-type case, a circuit board housed in the case, and an electrical connection to the circuit board,
And a connector arranged along one side, wherein the circuit board is made of a flexible board formed into a box shape by being bent, and the flexible board is grounded to give a shielding property. Card-type high-frequency device having a conductive layer formed at least in part.