JPH06282980A - Cd-rom game machine - Google Patents

Abstract

PURPOSE:To reduce the size of the machine down to the portable one in order to use it as a portable CD player as well at the game machine using the CD- ROM. CONSTITUTION:For this game machine, a CD circuit board 5 having a CD drive 3, a driving control circuit and a sound circuit and a game circuit board 7 having a game control main circuit are housed in a sequentially laminated arrangement in a case made of metal upper and lower cases 1, 9 to be used as a heat radiating board and a shield.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a game machine using a compact disc (CD) as a ROM (CD-ROM), and in particular, a CD-ROM game which also has a function as a CD player for listening to music. Regarding the machine.

[0002]

2. Description of the Related Art The most common type of video game console for personal use is the so-called R which stores game programs.
An OM cassette is inserted into a slot of a game machine and played. Besides these general forms, recently
In addition to the ROM cassette, a CD-ROM program RO
CD-ROM game machines used as M have appeared.

This CD-ROM game machine has, as a schematic configuration thereof, a CD drive mechanism (CD) for accessing a CD-ROM in addition to a game control circuit such as that mounted on a general video game machine. Drive) and its control circuit.

In a conventional CD-ROM game machine,
The above-mentioned CD driver and the electronic circuit board on which the game control circuit and the drive control circuit are mounted are arranged side by side. Therefore, it is inevitably larger than a general game machine.

[0005]

By the way, the CD-RO
Since the M game machine has a CD drive, it can also function as a CD player for listening to music and the like. In particular, with the emergence of a very compact CD player for mobile use, there is a demand for a CD-ROM game machine to have a compact size comparable to such a portable CD player and to be adapted to a use environment such as a mobile phone or a vehicle. . However, the conventional CD-ROM game machine has a large size far from meeting such a demand.

Therefore, the main object of the present invention is a CD, which is much smaller than the conventional one and is suitable for carrying.
-To provide a ROM game machine.

Further, a secondary object of the present invention is to overcome the difficulty of noise countermeasures and heat generation countermeasures associated with such downsizing, and to prevent wasteful consumption of a battery power source used for carrying as much as possible. Especially.

[0008]

A CD-ROM game machine according to the present invention comprises a flat plate type CD driver for reading data from a CD, a driver control circuit for controlling the CD driver, and a driver control circuit for controlling the CD driver. A sound circuit that receives sound data to generate an analog sound signal and a game circuit that receives and processes game data from the driver control circuit are provided. And with the CD driver,
One or more circuit boards on which the above-mentioned various circuits are mounted are arranged in a laminated positional relationship.

In the preferred embodiment, in order to reduce high frequency noise from the game circuit to the sound circuit, the game circuit and the sound circuit are mounted on different circuit boards, and a shield is arranged between the circuit boards. It Further, in order to dissipate heat from a heat-generating portion such as a power supply unit, the outer case is made of metal, and the heat is dissipated to the metal case. Further, the battery is supplied only to the portion functioning as a CD player, and the battery is not used during game play.

[0010]

According to the above construction, since the CD driver and the circuit board are laminated, the plane area of the game machine is greatly reduced as compared with the conventional side-by-side arrangement. In particular, if a circuit board is divided into a plurality of boards, such as a board for a game circuit and a board for other circuits, and the area of each circuit board is reduced to an extent comparable to that of a CD driver, The plane area is substantially close to that of the CD driver, and is comparable to that of the portable CD player. In addition, the outer case is made of metal, eliminating the need for special heat sinks and outer shields and minimizing the distance between each board, thus limiting the increase in game console thickness to a level that poses no practical problem. Therefore, it is possible to provide a very compact CD-ROM game machine as a whole.

[0011]

1 is an exploded view of a CD-ROM game machine according to the present invention. In FIG. 1, this game machine is housed in an outer case composed of an upper case 1 and a lower case 9 in a layout in which a CD drive 3, a CD circuit board 5, and a game circuit board 7 are sequentially stacked. To be done.

The upper case 1 is provided with a lid 10 which can be freely opened and closed for loading and unloading a CD, and a suitable position of the lid 11 is a game / CD mode switching switch 11 and a CD.
CD operation panel 1 for use as a player
5. A liquid crystal display device (LCD) 13 for displaying an operation mode and other necessary information is provided.

The CD drive 3 is a mechanical device including a motor for rotating the CD, a head for reading information from the CD, a mechanism for moving the head, and the like, and is configured in a flat plate shape having a thickness as thin as possible. There is.

The CD circuit board 5 includes a CD drive control circuit for controlling the CD drive 3 and a sound circuit for receiving various types of sound signals, which will be described later, and generating analog sound signals for output to headphones or the like. Is registered.

The game circuit board 7 has a game main control circuit for game play, a cartridge connector 71 for inserting a ROM cassette for each game, and a video output terminal 73 for connecting a television monitor.
And a control input terminal 7 for connecting a game operation input device such as a joystick or a control pad.
And 5 are listed. Furthermore, a power supply circuit and an adapter connector 77 for connecting the power supply circuit to an external AC power supply adapter (step-down and rectifier) are also listed. The power supply circuit and the adapter connector 77 may be mounted on the circuit board 5.

The lower case 9 is provided with a battery box 91, and the battery housed therein is mainly used as a power source for a CD player when it is carried. As will be described later, during game play, the power consumption is too large for the battery, so the power from the AC power adapter is used exclusively.

In such a configuration, since the CD drive 3 and the circuit boards 5 and 7 are arranged in a stacked form, the planar area of the game machine is larger than that of the conventional configuration in which these are arranged side by side. Is greatly reduced. In particular, for the main circuit board 7 which occupies the largest area among these, if the circuit layout is devised and the area is reduced to a level comparable to that of the CD drive 3 (this is possible by using a multilayer board). However, the plane area of this game machine is substantially the same as the area of the CD drive 3 plus the area of the battery box 91, and can be miniaturized to the same extent as that of the conventional portable CD player.

By the way, when such a laminated arrangement is adopted, there is a concern that problems regarding noise and heat dissipation may occur.

That is, since most circuit elements on the game circuit board 7 are digital circuits, high frequency electromagnetic waves generated from these digital circuits are mixed as noise into the analog sound signal of the sound circuit on the CD circuit board 5. May occur.

Further, in order to minimize the increase in the thickness of the game machine due to the stacked arrangement, the CD drive 3, the CD circuit board 5 and the game circuit board 7 are arranged as close to each other as possible. It is difficult to attach a sufficiently large heat sink to a heat-generating circuit element such as the power transistor.

In order to solve such a problem, this embodiment takes the following measures.

As described above, the sound circuit is mounted on the CD circuit board 5 different from the game circuit board 7,
This reduces the effect of high-frequency noise by keeping it a little distance from the main game circuit. Further, preferably, a metal plate or a metal plate as a shield is arranged between the circuit boards 5 and 7. When this shield is provided, the distance between the two substrates 5 and 7 can be reduced so that they are almost in close contact with each other.

Regarding heat dissipation, both cases 1 and 9 are formed of a metal having good thermal conductivity, and although not shown, a circuit element such as a power transistor of a power supply circuit that requires heat dissipation is placed in this case 1 or 9. Make contact to allow the case to dissipate heat. This eliminates the need to provide a special heat dissipation plate.

The heating element may be brought into contact with the case by arranging the heating element so as to face the case and simply contacting the back surface of the case. It is also conceivable that a metal plate is extended from the edge between both substrates 5 and 7 and is brought into contact with the extended metal plate. In the latter form, the extended metal plate can also be used as a shield between both substrates 5 and 7.

Further, if the cases 1 and 9 are made of metal, the case also functions as a shield for the outside of the game machine, so that it is not necessary to provide a special shield, and the size can be further reduced.

FIG. 2 shows a circuit block diagram of this CD-ROM game machine.

As described above, the drive control circuit 51 and the sound circuit 53 are mounted on the CD circuit board 5. The drive control circuit 51 includes a CD drive 3, a changeover switch 11, a liquid crystal display 3 and a CD operation panel 1.
5 is connected. The changeover switch 11 selects the game mode or the CD mode. In the game mode, the drive control circuit 51 drives the CD drive 3 according to a command from the main circuit board 7 to read game data and digital sound signals from the CD-ROM. The game data is the main circuit board 7 that controls the execution of the game.
And the digital sound signal is sent to the sound circuit 53. On the other hand, in CD mode, this game machine
In order to function as a player, the CD drive control circuit 51 drives the CD drive 3 according to a command from the operation panel 15, reads a digital sound signal from the CD, and sends it to the sound circuit 53. The sound circuit 53 converts the digital sound signal read from the CD into an analog sound signal and outputs it to an external device such as headphones.

As described above, the game main circuit is mounted on the game circuit board 7. In this main circuit,
Sub CPU 703, main CPU 711, sound CP
U721, work RAMs 705 and 713 for these CPUs, a CD interface 701 between the sub CPU 703 and the drive control circuit 51, a CPU interface 709 between the sub CPU 703 and the main CPU 711, a sound interface 717 between the main CPU 711 and the sound CPU 721, a PCM sound source circuit. 707, video display processor 715, FM sound source circuit 723, R
Input interface 719 for OM cassette connector 71 and operation input device such as a joystick
Etc. are included.

The sub CPU 703 receives the CD-R from the CD drive control circuit 51 via the CD interface 701.
The game data of the OM is received and decoded, and the game control data is transmitted through the CPU interface 709 to the main CPU 7.
11 or P based on PCM sound source control data
It drives the CM sound source circuit 707. Further, the sub CPU 703 receives data regarding the CD drive control and the PCM sound source control from the main CPU 711 through the CPU interface 709, sends the CD drive control data to the drive control circuit 51, and sends the PCM sound source circuit 7
07 is driven.

The PCM tone generator circuit 707 is a sub CPU 703.
Under the control of, the PCM sound signal is generated and sent to the sound circuit 53.

The main CPU 711 is a sub CPU 703.
From the CD-ROM, the connector 71 from the ROM cassette game control data, the input interface 719 from the gamer operation data, based on these, to drive the video display processor 715, CD drive drive and PCM
Data concerning sound source driving is sent to the sub CPU 703, and data concerning FM sound source driving is sent to the sound CPU 721 through the sound interface 717.

Video display processor 715
Generates a video signal and outputs it to a display device such as a CRT under the control of the main CPU 711.
It generates a digital sound signal and sends it to the sound circuit 53.

The sound CPU 721 is the main CPU 7
The FM sound source circuit 723 is driven based on the data from 11, and the FM sound source circuit 723 generates a digital sound signal and sends it to the sound circuit 53.

In the game mode, all the circuit elements on the two circuit boards 5 and 7 described above work to function as a game machine, while in the CD mode, only the circuit elements on the circuit board 5 are operated. Work here and function as a CD player.

FIG. 3 shows the structure of the power supply unit used in this game machine. This power source is designed so that the battery 105 is used only as a power source for a CD player and is not used when playing a game.

In FIG. 3, when an external AC power supply adapter is connected to the adapter connector 77, the DC voltage output from this AC power supply adapter is applied to the adapter connector 77.
Is supplied to the power supply circuit 103 via. Power supply circuit 103
Generates a stabilized constant DC voltage, and this DC voltage is supplied to each circuit element of the CD circuit board 5 through the backflow prevention diode D1. Further, the output voltage of the power supply circuit 103 is also supplied to each circuit element on the game circuit board 7 through the switching transistor Tr1 controlled by the mode changeover switch 11 when the switching transistor Tr1 is in the ON state.

The transistor Tr1 is supplied with a bias voltage from the power supply circuit 103, and when the switch 11 is in the game mode position (position shown in the drawing), the transistor Tr1 is turned on to allow the game circuit board 7 to be energized. , This makes this machine function as a game machine. On the other hand, when the switch 11 is in the CD mode position, the transistor T
The r1 is turned off, and the power to the game circuit board 7 is cut off, so that this machine functions only as a CD player.

The voltage supplied from the power supply circuit 103 to the game circuit board 7 is also used as a game / CD mode detection signal.

Furthermore, this supply voltage is
It is also used for on / off control of the transistor Tr2.
That is, when the mode switch Tr1 is in the game mode, the transistor Tr2 is turned on and the buffer 1
The digital sound processor 513, which processes the sound signal in the driver control circuit 51, is connected to the interface unit 8 by grounding the control terminal 107a of 07.
01 is connected to the CD interface 701. As a result, the function as a CD-ROM game machine becomes possible. On the other hand, when the mode switch 11 is in the CD mode, the transistor Tr2 is in the off state, so the buffer 10
7 is turned on, whereby the driver control circuit 5
The digital sound processor 513 in the first unit is separated from the CD interface 701 in the interface unit 801, and the function as the CD-ROM game machine cannot be exhibited.

The AC power adapter is the adapter connector 77.
When not inserted in the CD, the battery 105 is used instead.
Power is supplied to the circuit board 5. Further, no power is supplied to the game circuit board. At this time, the mode switch 1
Regardless of the position of 1, since the transistor Tr2 is in the off state, the buffer 107 is in the on state, which allows the unit to function only as a CD player.

[0041]

As described in detail above, according to the present invention, since the CD driver and the electronic circuit board are arranged so as to be laminated, it is significantly compact as compared with the conventional side-by-side arrangement. A CD-ROM game machine that is convenient to carry can be provided.

Further, according to the present invention, by mounting the sound circuit and the game circuit on different circuit boards, it is possible to reduce the influence of noise from the game circuit on the sound circuit.

Further, according to the present invention, the outer case is made of metal, and the heat generating component such as the power transistor of the power supply circuit is brought into contact with the case to radiate heat to the case. It is possible to suppress the increase of and contribute to downsizing.

Further, according to the present invention, the battery, which is mainly used as a power source for carrying, is used only for the CD player part and not for the game circuit which consumes a large amount of power. Can be suppressed.

[Brief description of drawings]

FIG. 1 is an exploded perspective view showing the arrangement of each part of an embodiment of the present invention.

FIG. 2 is a block diagram showing a configuration of an electronic circuit of the same example.

FIG. 3 is a block diagram showing a configuration of a power supply unit of the embodiment.

[Explanation of symbols]

 1 Upper case 3 CD driver 5 CD circuit board 7 Game circuit board 9 Lower case

Claims (7)

[Claims] 1. A flat-plate type CD driver for reading data from a CD, a driver control circuit for controlling the CD driver, a sound circuit for receiving sound data from the driver control circuit and generating an analog sound signal. And a game circuit which receives game data from the driver control circuit and processes the game data, and a CD in which the CD driver and one or more circuit boards on which the various circuits are mounted are stacked in a positional relationship.
-ROM game machine. 2. The game machine according to claim 1, wherein the sound circuit and the game circuit are mounted on different circuit boards, and the circuit boards are arranged in a laminated positional relationship. CD-ROM game machine. 3. The game machine according to claim 2, wherein a shield for absorbing noise is arranged between the circuit board of the sound circuit and the circuit board of the game circuit. ROM game machine. 4. The game machine according to claim 1, further comprising a metal case containing the CD driver and the various circuits. 5. The game machine according to claim 4, further comprising a power supply unit for supplying electric power to the CD driver and the various circuits, wherein a predetermined circuit element of the power supply unit is made of the metal for heat dissipation. A CD-ROM game machine characterized by being brought into contact with the case of. 6. The game machine according to claim 5, wherein the sound circuit and the game circuit are mounted on different circuit boards, and the circuit boards are stacked and arranged in a positional relationship. A part of the case extends between the sound circuit board and the game circuit board so as to function as a shield for absorbing noise between the sound circuit board and the game circuit board, and a predetermined circuit element of the power supply unit is brought into contact with the extended part of the case. A CD-ROM game machine characterized by being used. 7. The game machine according to claim 1, further comprising a mode switch for selecting a game mode for performing a function as a CD-ROM game machine and a CD mode for performing only a function as a CD player. Depending on the mode selected by the mode switch,
A power source unit for supplying power to a portion of the various circuits necessary for the selected mode, the power source unit having a battery, and the power from the battery is used for the mode. A CD-ROM game machine characterized in that it is supplied only to a portion required for the CD mode regardless of the mode selected by the switch.