JPH08287570A - Optical disk driving device - Google Patents

Abstract

PURPOSE: To enable an improvement in assembly characteristic and saving of space, to, facilitate the housing and discharging of a tray, to improve operability and convenience and to reduce a size and thickness by providing the above device with one to plural pieces of permanent magnets or electromagnets in place of conventional locking mechanisms. CONSTITUTION: Two pieces of the electromagnets 2 are formed by winding coils around iron cores changeably in magnetic poles and are disposed on both sides of the inside wall on the rear part side of the tray 103. Two pieces of the permanent magnets 3 are disposed in the positions where these magnets are pressed to the rear parts of the electromagnets 2 disposed on the tray 103 so as to face the rear parts. An ejection button 4 is disposed at the front face of the tray 103 to discharge the tray 103. The electromagnets 2 are changeable in the magnetic poles by the direction of the current to be passed to the coils. The energization control section, not showing in Fig., in this device 1 has a housing stage for passing current to the coils of the electromagnets 2 in such a manner that the directions of the polarities of the electromagnets are made approximately same to the polarities of the permanent magnets 3 at the time of housing the tray 103 and a discharge stage for passing current to the coils of electromagnets 2 in such a manner that the directions of the magnetic poles of the electromagnets are made approximately opposite from the directions of the magnetic poles of the permanent magnets 3 at the time of discharging the tray 103.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical disk drive device for mounting an optical disk and picking up stored information. In particular, CD-ROMs (Compact Disc Rea) are attracting attention as external memories of computers.
d Only Memory) drive or the like, and relates to a drawer type optical disk drive device for loading and unloading a tray.

[0002]

2. Description of the Related Art In recent years, as a method of inserting an optical disk into an optical disk drive device, a caddy system in which a disk is stored in a cartridge called a caddy and then inserted into a main body, a pickup together with a tray slides back and forth from the main body, and the disk Drawer method to wear is used. Among them, recently, optical disc drive devices have been downsized and thinned, and a drawer system has been widely adopted.

A conventional optical disk drive device will be described below with reference to the drawings. FIG. 4 is an exploded perspective view of a main part of a conventional optical disk drive device. Reference numeral 100 denotes an optical disk drive device such as a conventional CD-ROM, 10
1 is a case-shaped upper cover formed in a substantially rectangular shape,
Reference numeral 02 denotes a casing-shaped bottom cover formed in a substantially rectangular shape and covering the upper cover 101, 103 denotes a tray formed in a substantially rectangular flat plate, and 104 denotes a substantially central portion of the upper surface of the tray 103. An optical disc mounting portion for mounting a disc formed in a substantially circular shape, and 105 is a bottom cover 10.
2 is a rail that is slidably disposed on the inner wall side and serves as a guide when the tray 103 is stored and discharged. Reference numeral 106 denotes a tray 103 that is erected at one corner on the depth side of the bottom cover 102 when the tray 103 is stored. A lock shaft for locking the tray 103, 107 is the tray 10 when the tray 103 is stored.
A lock arm disposed at a corner on the depth side of the tray 103, which has a substantially rectangular parallelepiped-shaped locking portion having a tip portion extending in a substantially triangular shape to lock the lock shaft 3.
The tray 103 is locked by being locked to the tray 06. Reference numeral 108 is a lock arm shaft that pivotally supports the lock arm 107, and 109 is a lock spring that is an elastic member that presses the lock arm 107 against the lock shaft 106 and locks it securely. Here, arrow A in the figure indicates the rotation direction of the lock arm 107. Also, 1
Numeral 10 is a push arm which is rotatably attached to the shaft and is composed of two plate-like members for pushing out and ejecting the tray 103.
Reference numeral 11 denotes a push arm shaft that pivotally supports a push arm 110 that is erected at one corner on the depth side of the bottom cover 102, and 112 is in contact with the tray 103 and the tray 10 is provided.
A push roller for ejecting 3 and 113 are push springs that are elastic members that give a driving force for pushing out the tray 103. Here, arrow B in the figure indicates the rotation direction of the push arm 110.

Regarding the conventional optical disk drive device constructed as described above,
The discharge method will be explained. First, the discharge method of the tray 103 is
The lock arm 107 is unlocked from the lock shaft 106 by pushing the tray 103 a little further into the tray 103, and the tray 103 is pushed a little to the front by the push arm 110, so that the disc can be taken in and out by the user's hand. So as to be drawn further. next,
To store the tray 103, the lock arm 107 is pushed by pushing the tray 103.
The tray 103 is locked, the tray 103 is fixed, and reading of the data of the disc is performed.

[0005]

However, in the above-mentioned conventional configuration, as the tendency of the product of the optical disk drive device, the mounting from the desktop personal computer to the notebook personal computer is progressing, and it is important to reduce the thickness and weight. Is being watched. However, in the conventional optical disk drive device as described above, a space for a lock mechanism for fixing the tray and a push mechanism for pushing out the tray is required, which makes it difficult to reduce the size and thickness of the device. Had. Further, there is a problem in that stable fixation is poor due to vibration and the like, and durability of the lock mechanism, push arm and the like is poor. In addition, there is a configuration that uses a motor that can automatically store and eject trays etc. according to instructions from the eject button or computer software, but it is also difficult to make the device smaller, thinner and lighter. It had a problem that

The present invention solves the above-mentioned problems of the prior art, improves the assemblability and saves space, allows easy storage and ejection of trays, is excellent in operability and convenience, is small in size,
It is an object of the present invention to provide an optical disc drive device that is excellent in weight reduction.

[0007]

In order to achieve this object, an optical disk drive device according to claim 1 of the present invention is a drawer type optical disk drive device provided with a substantially flat plate-shaped tray having an optical disk mounting portion. There are one or more permanent magnets provided on the inner wall of the rear side surface of the tray, or one or more electromagnets having a coil wound around an iron core whose magnetic poles can be changed, and permanent magnets arranged on the tray. One or a plurality of electromagnets that are in contact with the rear part of the magnet and face the permanent magnets, or one or more permanent magnets that are in the rear part of the electromagnet and that are opposed to and can contact the electromagnets arranged in the tray. It has a configuration including a magnet and an energization control unit that controls the direction of the current flowing through the coil of the electromagnet and stores and discharges the tray.

[0008] Here, the energization control section causes the current to flow through the coil of the electromagnet so that the direction of the polarity is substantially the same as that of the permanent magnet when the tray is accommodated, and the direction of the permanent magnet and the pole is substantially opposite when the tray is ejected. By including the discharge step of passing a current through the coil of the electromagnet, the tray storage and discharge can be automated. As the permanent magnet, an alnico-based cast magnet made of magnetic steel, a barium-based ferrite magnet made of an oxide magnet, or the like is used. or,
As an electromagnet, a coil is wound around an iron core,
The magnetic pole can be changed depending on the direction of the current flowing through the coil. As the iron core used in this electromagnet, a steel plate having a small exciting iron loss such as a silicon steel plate is used.

[0009]

With this structure, when the tray of the optical disk drive device is stored, a current is passed through the coil of the electromagnet so as to attract the permanent magnet, and the tray is attracted and fixedly stored inside the optical disk drive device. Further, when the tray is ejected, a current can be passed through the coil of the electromagnet so as to repel the permanent magnet, and the tray can be pushed out of the drive.
As a result, unlike mechanical driving, the mechanism is simple, there are very few failures, stable fixing is possible, and reliability in reading the disk can be improved. In particular, the space for the lock mechanism for fixing the tray and the space for the push mechanism for pushing out the tray is not required, and the space can be saved and the size and thickness can be reduced by only the permanent magnet and the electromagnet. Further, in the state where the tray is housed, the iron core is attracted by the permanent magnet, so that the iron core can be stably fixed, and it is not necessary to supply a current to the coil, and low power consumption of the device can be achieved. The tray can be stably fixed even when the power of the device is off. Further, it is sufficient to simply change the direction of the electric current, the control is easy, the operation can be performed from software, and the convenience can be improved. Furthermore, by inserting / switching resistors, etc., and changing the strength of the current, it is possible to use common parts even if the weight and size of the model are different. can do. In addition, the energization control unit stores the current in the coil of the electromagnet so that the direction of the magnetic pole is substantially the same as that of the magnetic pole when the tray is stored; Since it is provided with a discharging step, it can be automated and the operability and convenience of the apparatus can be improved.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An optical disk drive device according to an embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is an exploded perspective view of an essential part showing an internal structure of an optical disk drive device according to an embodiment of the present invention. 1 is an optical disc drive device according to an embodiment of the present invention, 101 is an upper cover, 102 is a bottom cover, 103 is a tray, 104 is an optical disc mounting portion, and 10
5 is a rail. Since these are the same as those in FIG. 4 of the conventional example, the same reference numerals are given and description thereof is omitted. In the present embodiment, 2 is an electromagnet having a coil wound around an iron core whose magnetic pole can be changed, and is provided on both sides of the inner wall of the rear side surface of the tray 103. 3 is a permanent magnet, and the tray 103
Is disposed in the rear part of the electromagnet 2 so as to face the electromagnet 2 and to be in contact therewith. Reference numeral 4 denotes an eject button provided on the front surface of the tray 103 when ejecting the tray 103. Here, the magnetic pole of the electromagnet 2 can be changed depending on the direction of the current flowing through the coil. In addition, the energization control unit (not shown) in the optical disk drive device 1 uses the tray 10
The coiling of the electromagnet 2 is such that the storing step of passing a current through the coil of the electromagnet 2 in the same direction as the permanent magnet 3 when the tray 3 is stored and the direction of the magnetic poles of the permanent magnet 3 when discharging the tray 103 are substantially opposite. And a discharge step of passing an electric current therethrough.

Regarding the optical disk drive device of the present embodiment having the above-mentioned configuration,
The discharging method will be described with reference to the drawings. FIG. 2 is an exploded perspective view of essential parts showing a state where the tray 103 is stored,
FIG. 3 is an exploded perspective view of essential parts showing a state in which the tray 103 is ejected. As shown in FIG. 2, when the tray is accommodated, an electric current is applied to the coil of the electromagnet 2 by the energization control unit (not shown) so that the magnetic pole attracts the permanent magnet 3 so that the tray 103 is securely held. The permanent magnet 3 is housed and attracted and fixed to the iron core of the electromagnet 2. As shown in FIG. 3, the eject button 4 or software such as a computer gives an instruction to eject the tray 103. Here, the energization control unit (not shown) causes a current to flow in the coil of the electromagnet 2 in a direction opposite to the direction in which the coil is housed, thereby forming a magnetic pole that repels the permanent magnet 3. The repulsive force causes the tray 103 to be ejected from the optical disk drive device 1 to the extent that it can be easily held by a finger, and then the tray 1
Hold the end of 03 and pull out the tray 103 along the guide of the rail 105. When the tray 103 is to be stored again, when the tray 103 is pushed into a certain position, a current is applied to the coil of the electromagnet 2 so as to form a magnetic pole attracting the permanent magnet 3, and the attracting force causes the tray 103 to move.
Is stored and fixed. Here, during storage, when the tray 103 comes to a certain position, the energization control unit causes the coil of the electromagnet 2 to draw a current to the permanent magnet 3 by a detection signal from a position detection sensor such as a photo interrupter or a magnetic sensor. Give instructions to flush.

As described above, according to this embodiment, the tray of the optical disk drive device can be easily stored and ejected, and the device can be made smaller and thinner. In addition, stable storage and ejection can be performed automatically by instructing the storage and ejection of the tray with a computer or eject button.
It is possible to improve convenience.

[0014]

As described above, according to the present invention, when the tray of the optical disk drive device is stored, the tray can be fixed inside the optical disk drive device by passing a current through the coil of the electromagnet so as to attract the permanent magnet. Further, when ejecting the tray, the tray can be pushed out of the optical disk drive device by passing a current through the coil of the electromagnet so as to repel the permanent magnet. This allows
It is possible to realize an optical disk drive device that has a simple mechanism, is easy to assemble, and has excellent mass productivity and reliability. In particular, there is no need for a space for a lock mechanism for fixing the tray or a push mechanism for pushing out the tray, and it is possible to save space by only using permanent magnets and electromagnets, and to provide an optical disk drive device that is excellent in downsizing and thinning. Can be realized. Further, in the state where the tray is stored, the iron core is attracted by the permanent magnet, so that the tray can be stored stably and low power consumption can be achieved.
Further, it is sufficient to control only changing the direction of the current, the control is easy, and convenience can be improved. Furthermore, by inserting / switching resistors, etc., and changing the strength of the current, parts can be made common even if the weight and size of the model are different, making it excellent in mass productivity and excellent in low cost. It is also possible to realize an optical disk drive device. In addition, since electrical control is possible, tray storage / drawing can be automated by software, and an optical disk drive device excellent in convenience and reliability can be realized.

[Brief description of drawings]

FIG. 1 is an exploded perspective view of an essential part showing the internal structure of an optical disk drive according to an embodiment of the present invention.

FIG. 2 is an exploded perspective view of an essential part showing a state where a tray of the optical disk drive according to the embodiment of the present invention is housed.

FIG. 3 is an exploded perspective view of essential parts showing a state in which a tray of an optical disk drive according to an embodiment of the present invention is ejected.

FIG. 4 is C, which is one of conventional optical disk drive devices.
Main part exploded perspective view showing internal structure of D-ROM device

[Explanation of symbols]

1 Optical Disc Drive Device of One Embodiment of the Present Invention 2 Electromagnet 3 Permanent Magnet 4 Eject Button 100 Conventional Optical Disc Drive Device such as CD-ROM 101 Upper Cover 102 Bottom Cover 103 Tray 104 Optical Disc Mounting Section 105 Rail 106 Lock Shaft 107 Lock Arm 108 Lock Arm Shaft 109 Lock Spring 110 Push Arm 111 Push Arm Shaft 112 Push Roller 113 Push Spring

Claims (1)

[Claims] 1. A drawer type optical disk drive device having a substantially flat plate-shaped tray having an optical disk mounting portion, wherein one or a plurality of permanent magnets or magnetic poles provided on an inner wall of a rear side surface of the tray can be changed. One or a plurality of electromagnets each having a coil wound around an iron core, and one or a plurality of the electromagnets that can come into contact with the permanent magnets arranged on the tray at a rear portion of the permanent magnets and facing the permanent magnets. Alternatively, the direction of current flowing in the coil of the electromagnet and one or a plurality of permanent magnets that can contact the electromagnet arranged on the tray at the rear of the electromagnet and face and contact the electromagnet are controlled. An optical disk drive device comprising: an energization control unit that stores and ejects the tray.