JPH062837U - Card type electronic device - Google Patents

Abstract

(57) [Abstract] [Purpose] It is possible to expand the mounting area of the circuit board housed in the case and expand the built-in functions within the limited size of the card-type case equipped in the card-type electronic device. To do. [Structure] A flexible printed circuit film 6 is used as a circuit board, both surfaces thereof are used as mounting surfaces of electronic components 7, and the flexible printed circuit film 6 is folded back with a spacer 40 sandwiched between them so as to be in a superposed state. .

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a card-type electronic device, and more particularly to improvement of a circuit board included in the card-type electronic device.

[0002]

[Prior art]

 For example, a card-type electronic device such as an IC memory card usually has a card-type case, and a circuit board is housed in the case. For the circuit board, for example, a glass epoxy base material having a thickness of about 0.8 mm is used. Required electronic components are mounted on such a circuit board. Also, a double-sided printed circuit board may be used as the circuit board in order to increase the packaging density.

[0003]

[Problems to be solved by the device]

 Such card-type electronic devices need to meet the demands of being easy to carry and being able to be stored in a small space. For that purpose, they must be small and thin.

On the other hand, as a recent common demand for card-type electronic devices, expansion of built-in functions is required in order to obtain high added value and the like.

In order to simultaneously satisfy these demands of being small and thin and expanding the built-in functions, high-density mounting of components on a circuit board is required. This high-density mounting can be achieved, for example, by downsizing components and increasing the number of circuit boards, but both require immediate development for a long period of time and increase costs, which is immediately effective. There is a point that it is difficult to be a countermeasure that has a certain nature.

Therefore, an object of the present invention is a card-type electronic device capable of high-density mounting of components without resorting to the above-mentioned means such as miniaturization of components and multi-layering of circuit boards. It is to try to provide equipment.

[0007]

[Means for Solving the Problems]

 A card-type electronic device according to the present invention includes a card-type case and a connector arranged along one side of the case, and is folded back with a spacer interposed therebetween in order to solve the above-mentioned technical problem. The flexible printed circuit film having a portion overlapped by is housed in the case while being electrically connected to the connector.

[0008]

[Action]

 Even if the flexible printed circuit film provided in the card-type electronic device according to the present invention has a large mounting area, it can be folded and overlapped to reduce the apparent area without significantly increasing the thickness.

[0009]

[Effect of device]

 Therefore, according to the present invention, by folding and stacking the flexible printed circuit films, it is possible to increase the packaging density within a limited size or space, and as a result, the built-in functions provided in the card-type electronic device. Can be easily expanded. Further, according to the flexible printed circuit film, the mounting area can be easily expanded by increasing the number of times of folding.

Further, since the flexible printed circuit films are overlapped with each other with the spacer interposed therebetween, it is possible to maintain a constant gap between the overlapped portions. Therefore, undesired contact between electronic components can be prevented, and reliability can be ensured.

[0011] Further, the flexible printed circuit film is generally difficult to handle because it has flexibility and elasticity, but it is possible to reinforce the flexible printed circuit film by the spacer described above. The handling is improved. At this time, if the flexible printed circuit film and the spacer are fixed by a method such as adhesion, the handleability is further improved.

[0012]

【Example】

 An embodiment in which the present invention is applied to a card type high frequency device, more specifically, a card type electronic tuner will be described below.

The basic structure of the card-type electronic tuner is proposed in Japanese Patent Application No. 3-159032 filed on June 28, 1991, but it is not known yet. explain.

A television receiver requires a tuner, and an electronic tuner has recently been widely used as such a tuner. 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.

At present, as a device having a video display function which is generally used, there are a video device such as a personal computer having a display and an information device in addition to the above-mentioned television receiver. As a matter of course, since these video equipments or information equipments do not have a built-in tuner, they cannot receive the television broadcast and output the video and audio.

However, these video devices and information devices often already have sufficient functions to be used as television receivers 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.

Therefore, a card type electronic tuner has been proposed.

This card type electronic tuner is electrically connected to the card type case, a circuit board constituting the tuner circuit section, the channel control circuit section and the demodulation circuit section housed in the case, and the circuit board. And a connector arranged along one side of the case.

According to such a card-type electronic tuner, the circuits necessary for the electronic tuner, including the peripheral circuits necessary for reception, are housed in the card-type case, and the signal input / output uses the connector. Can be done through.

Therefore, such a card type electronic tuner is easy to store and carry like an IC memory card, and is suitable for handling as an optional accessory for various video equipment or information equipment. . Therefore, it is not necessary to store functions that are not always used in the main body of these devices, such as the function as a television receiver in video equipment or information equipment, which increases the size and weight of such equipment. Can be prevented.

Further, the card type electronic tuner is provided with all circuits necessary for the tuner including peripheral circuits necessary for reception, and the input / output of signals can be performed through the connector. Therefore, they can be made to function as a television receiver by mounting them on the main body of the video equipment or the information equipment when necessary. In this case, the main body of the video equipment or the information equipment is provided with, for example, a slot in which the card type electronic tuner can be mounted, and a connector paired with the connector provided in the card type electronic tuner in relation to this slot. Should 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.

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, and FIG. 2 is a sectional view taken along line II-II in FIG. FIG. 3 is a block diagram showing an electric circuit provided in the card type electronic tuner 1.

The card type electronic tuner 1 includes a card type case 2. The case 2 includes a frame 3, an upper cover 4 that closes an upper surface opening of the frame 3, and a lower cover 5 that closes a lower surface 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 composed 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 above-mentioned fixing of the upper cover 4 and the lower cover 5 to the frame 3 is performed by a method such as screwing, adhesion, or welding.

A flexible printed circuit (FPC) film 6 is housed in the case 2. Required electronic components 7 are surface-mounted on both sides of the FPC film 6. The FPC film 6 has a portion that is overlapped by being folded back with the spacer 40 interposed therebetween. The mounting of the electronic component 7 described above is performed before the FPC film 6 is folded back as shown in FIG. 4, and after the mounting is completed, the spacer 40 is sandwiched and folded back. The spacer 40 has a function of keeping a constant gap between the overlapping portions of the FPC film 6.

The folded FPC film 6 may be incorporated into the frame 3 of the case 2 as it is, but the folded FPC film 6 and the spacer 40 are temporarily fixed in advance by a double-sided adhesive tape or the like for handling. It may be made easy and then assembled into the frame 3.

The connector 8 is arranged along the short side of the case 2, for example. The connector 8 is held by the frame 3 in this embodiment. These connectors 8 are electrically connected to the FPC film 6.

As represented by the electronic component 7 shown in FIG. 2, various circuits are formed on the FPC film 6. The circuit constructed on this FPC film 6 is shown in FIG.

Referring to FIG. 3, the circuit formed on the FPC film 6 roughly includes a tuner circuit section 9, a channel control circuit section 10 and a demodulation circuit section 11. The tuner circuit unit 9 also includes a VHF circuit unit 12 and a UHF circuit unit 13.

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

The channel control circuit unit 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 / amplification circuit 26. To be done. 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 included in the demodulation circuit unit 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. To be Further, the demodulation circuit 30 supplies a sync signal to the sync signal output terminal 33.

Further, the above-mentioned printed circuit board 6 is provided with a power supply voltage terminal 34 for supplying a power supply voltage to the entire circuit formed thereon, and a tuning voltage for supplying a channel control circuit unit 10 with a tuning voltage. A tuning voltage terminal 35, a clock terminal 36 for supplying a clock signal, a data signal and an enable signal to the channel control circuit section 10, a data terminal 37 and an enable terminal 35, and an earth terminal 39 are formed.

The terminals 14, 31 to 39 thus formed on the printed circuit board 6 are electrically connected to the corresponding connectors 8, respectively.

Although not shown in FIG. 2, a sheet suitable for each purpose should be interposed in the gap between the electronic components 7 facing each other by folding the FPC film 6 for the purpose of shielding, insulating, or the like. You may

5 and 6 show an FPC film 6a and a spacer 40a included in another embodiment of the present invention.

In this embodiment, the spacer 40a is preliminarily attached to the FPC film 6a. As shown by the broken line in FIG. 5, the spacer 40a has only the minimum required shape to fulfill the reinforcement of the FPC film 6a, and even on the surface of the FPC film 6a to which the spacer 4a is attached, It is possible to mount electronic parts. The material of the spacer 40a is appropriately selected, but it is preferable to use, for example, a resin laminated plate or the like.

The electronic components are mounted on the FPC film 6a before the FPC film 6a is folded back, as shown by the solid lines in FIGS. At this time, since the spacer 40a functions as a reinforcing member for the FPC film 6a, the mounting equipment applied to the rigid circuit board can be used as it is.

After the mounting of such electronic components is completed, the FPC film 6a is folded back as shown by an imaginary line in FIG. At this time, the spacer 40a needs to be divided at the position of the center line 41, but due to such division, a V-cut groove is formed in advance along the center line 41 of the spacer 40a, and the portion thereof is cut. It is possible to adopt a method of cutting by bending with, or a method of shearing along the center line 41 with a blade. Further, in order to facilitate the division of the spacer 40a as described above, a notch 42 is provided in advance at the edge portion on the center line 41 of the FPC film 6a.

The FPC film 6a folded back as shown by the imaginary line in FIG. 6 is incorporated into the card-type case as described above, and upon such incorporation, the FPC film 6a was folded back and overlapped. If each part of the spacer 40a is temporarily fixed to each other, easier assembling work becomes possible.

According to this embodiment, even after the FPC film 6a is assembled in the case, the spacer 40a holds the main part of the FPC film 6a, so that the posture of the FPC film 6a is kept stable. In addition, resistance to external influences such as vibrations or drops is maintained.

Further, according to this embodiment, when the above-mentioned sheets for the purpose of shield, insulation, etc. are interposed in the gap between the facing electronic parts, such sheets are superposed on the spacer 40a. Since it can be sandwiched between the parts, the position of the seat can be easily and surely determined. In the embodiment of the card type electronic tuner described above, although not shown, the receiving antenna is The electronic tuner may be external or internal.

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

Further, since each surface given by the folding of the FPC film, which is a feature of the present invention, is used properly according to the electronic device to be obtained, for example, between the upper and lower circuits overlapped with each other. For the purpose of shielding, most of the opposing surfaces of the FPC film may be used as an earth pattern without using electronic parts.

[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 sectional view taken along the line II-II in FIG.

FIG. 3 is a block diagram showing an electric circuit formed on the flexible printed circuit film 6 shown in FIG.

4 is a front view showing a folding step of the flexible printed circuit film 6 shown in FIG.

FIG. 5 is a perspective view showing a flexible printed circuit film 6a and a spacer 40a included in another embodiment of the present invention.

FIG. 6 is a front view for explaining a folding step of the flexible printed circuit film 6a shown in FIG.

[Explanation of symbols]

 1 Card Type Electronic Tuner (Card Type Electronic Equipment) 2 Case 6, 6a Flexible Printed Circuit Film 7 Electronic Component 8 Connector 40, 40a Spacer

Claims (1)

[Scope of utility model registration request] 1. A flexible printed circuit film having a card type case, and a portion housed in the case and overlapped by folding back with a spacer interposed therebetween, and electrically connected to the flexible printed circuit film. And a connector arranged along one side of the case.