JPWO2006085501A1 - Disk drive device, disk drive method and disk - Google Patents

Abstract

Provided are a disk drive device, a disk signal processing system, and a disk having a low-cost and simple configuration that can reliably transmit and receive electrical signals between a disk and an external device, and that greatly improve the expandability of the disk utilization field. The disk 1 includes an electronic circuit 4 as an electronic function unit, and includes a first conductive unit 2 electrically connected to the electronic circuit 4. The disk 1 is placed on the turntable 100, and the disk 1 is contacted and gripped by gripping means and rotated to read information stored in the disk 1. A second conductive portion 105 that is in electrical contact with the first conductive portion 2 is provided on at least a part of the contact gripping portion (turntable) 100 of the gripping means 100 and 200 that touch and grip the disk 1.

Description

  The present invention relates to a disk drive device, a disk drive method, and a disk. For example, the present invention relates to a disk drive device, a disk drive method, and a disk that reliably transmit and receive signals between the disk (rotary recording medium) and the disk drive device with a simple configuration. .

  Optical discs are the most promising future recording media because they have a very large amount of data that can be recorded and are extremely advantageous in terms of cost performance despite being composed of extremely inexpensive materials such as polycarbonate. It is.

  A disk drive device is used to read information recorded on an optical disk or write information (read / write). A disk drive device places an optical disk on a turntable, clamps it with a clamper, rotates it with a spindle motor, irradiates a laser beam, receives reflected light from the surface of the optical disk, and demodulates a recording signal. It is configured to read. A typical configuration example of such a disk drive device is disclosed in Patent Documents 1 to 3.

Japanese Patent Laid-Open No. 11-353749 (paragraph number [0024] FIG. 1) JP 2000-100031 (paragraph numbers [0013] to [0015] FIG. 3) JP-A-2000-100032 (paragraph numbers [0012] to [0017] FIG. 1)

  By the way, there has been proposed an optical disc in a form in which not only a recording area but also an electric circuit such as an electronic circuit is mounted on the optical disc. However, the optical disk and the disk drive device operate in an electrically insulated state, the optical disk rotates at a high speed, etc., and the electronic circuit mounted on the optical disk and the disk drive It is not easy to send and receive signals to and from the internal circuit on the device side.

  As a disk drive device of this kind of optical disk, a wireless signal is used for signal transmission / reception between the optical disk side and the disk drive device side. For example, antennas are formed on the optical disk surface and the disk drive side, respectively, and wireless signals are transmitted and received through these antennas (Patent Document 4). The current mainstream is such wireless signal transmission / reception.

JP-A-8-161790 (paragraph numbers [0020] to [0025] FIG. 1)

  Although a configuration in which a light emitting / receiving circuit is formed on each of the optical disk side and the disk drive side and an optical signal is transmitted / received through the light emitting / receiving circuit can be considered, there is no actual proposal.

Furthermore, a configuration has been proposed in which signal transmission / reception between the electronic circuit and an internal circuit on the disk drive device side is performed in a state where rotation by the disk drive device is stopped (see Patent Document 5).
US Pat. No. 5,119,353 (FIG. 4, columns 4 and 5)

Patent Document 6 discloses a disk drive device having a structure as shown in FIGS. 19 (A) and 19 (B).
Japanese Patent Laid-Open No. 5-54460 (FIG. 1, paragraph numbers [0013] to [0028])

  In this disk drive device, a solid-state memory 612 is embedded in a disk 610, and lead wires 613a to 613f are drawn from input / output terminals DI, DO, CS, SCK, and VDO of the solid-state memory 612 (in the solid-state memory 612). The concentric ring-shaped terminals 614a to 614f are formed on the disk surface so as to correspond to the respective lead wires. On the other hand, external contact terminals 617a to 617f to be connected to the input / output terminals of the solid-state memory 612 via lead wires are provided on the upper surface side of the clamper 615, and these external contact terminals are signal transmission media (specific configuration unknown). Is electrically connected to the data input unit 620.

  A concave portion 700 is provided on the disk-facing side of the clamper, and contact terminals 616a to 616f having sharp tips are juxtaposed along the radial direction facing the ring-shaped terminals 614a to 614f existing on the disk surface. ing. The contact terminals 616a to 616f are urged downward by a coil spring 618. Further, dummy pins 616g to 616l having the same shape as the contact terminals 616a to 616f are provided on the same line of the contact terminals 616a to 616f. Similarly, the dummy pins 616g to 616l are also provided in accordance with the interval between the ring-shaped terminals 614a to 614f.

  When the optical disc 610 is clamped by the contact surface with the optical disc 610 except for the concave portion 700 of the clamper 615, the projection 615A of the clamper 615 is fitted into the center hole 610A of the optical disc 610, whereby the optical disc 610 is positioned with respect to the clamper 615. Is called. At this time, the contact terminals 616a to 616f of the clamper 615 are provided in alignment with the intervals of the ring-shaped terminals 614a to 614f. Therefore, at the time of clamping, the contact terminals 616a to 616f and the ring-shaped terminals 614a to 614a Correspondence with 614f is taken.

  And since each contact terminal 616a-616f is urged | biased downward by the coil spring 618, the electrical contact with respect to each ring-shaped terminal 614a-614f is performed.

  As described above, conventionally, transmission / reception of signals between the electronic circuit mounted on the disk surface and the internal circuit of the disk drive device is mainly performed wirelessly via antennas formed respectively on the disk surface and the disk drive side. Send and receive signals. However, formation of such an antenna requires formation with a shape parameter suitable for the frequency of the radio signal, and formation of such an antenna on the disk surface not only requires a highly accurate etching technique, but also wireless It is also necessary to form a frequency conversion circuit to / from the radio frequency, and low cost is a big problem for optical discs with great benefits.

  In particular, in the case of an optical disk, since a thin metal film such as aluminum is formed on the surface, it becomes an obstacle to radio wave transmission and reception of an antenna formed in close contact with the surface (micron order). The same applies to other discs, and there are many metal members that cause radio interference near the disc, including the disc drive device, which causes a problem. In addition, the antenna mounted on a disk rotating at a high speed of several thousand ppm may not only be physically and electrically unstable, but also depending on the magnitude of transmission power, Leaks and may cause wiretapping, and conversely, there is a problem of external interference. Furthermore, the antenna arrangement direction has a great influence on the transmission / reception sensitivity, and a stable transmission / reception sensitivity cannot be obtained. Further, in order to mount a wireless unit including an antenna on a disk, considering the standard and balance, it is necessary to reduce the thickness and size as much as possible, which causes a problem in relation to performance. These problems become more prominent because the disk on which the antenna is mounted rotates at a very high speed.

  Further, in the configuration in which optical signals are transmitted and received through the light emitting / receiving circuits formed on the disk side and the disk drive device side, the positional relationship between the rotating disk and the stationary disk drive apparatus is extremely high. Since it changes at high speed, it is very difficult to realize the configuration.

  Further, when the signal transmission / reception is performed between the electronic circuit and the internal circuit on the disk drive device side while the rotation by the disk drive device is stopped, the signal between the disk and the disk drive device side during the disk rotation. Transmission and reception cannot be performed, and signal processing in real time is impossible.

  In addition, the disk drive device disclosed in Patent Document 6 is not only costly with a very complicated configuration, but it is almost impossible to realize stable and reliable operation. Hereinafter, the problem will be described more specifically.

  Each of the contact terminals 616a to 616f has a sharp tip and is configured to be biased downward by a coil spring 618 in the recess 700 of the clamper and is in electrical contact with the ring-shaped terminal. However, these contact terminals 616a to 616f are urged by a coil spring 618 only for electrical contact, and firmly hold and hold the disc so that there is no displacement or slippage when the disc is rotated. Basically, it does not have a clamping function. It is a portion excluding the concave portion 700 that is in surface contact with the disk 610 of the clamper 615 that performs the clamping function. Since the contact terminals 616a to 616f having sharp tips are urged downward by the coil spring 618 in the recess 700 of the clamper, the disk 615 is pressed downward (vertical direction) to be electrically contacted with the ring-shaped terminal. However, since it is basically a point contact, displacement and slippage in the horizontal direction (rotation direction) cannot be suppressed, and the clamping function is not performed. In addition, the electrical connection must be unstable due to the coil spring characteristic and its characteristic deterioration.

  Further, since the solid-state memory is small, the interval between the input and output terminals therefrom is also narrow, and therefore the formation interval of the ring-shaped terminals formed on the disk surface in the radial direction is also narrow. In the case of an in-vehicle CD player device or the like, the relative position of the clamper and the disk may be shifted due to an external force. In this case, the contact between the contact terminal and the ring-shaped terminal that should be contacted is lost. In addition, there is even a risk of contact with the adjacent ring-shaped terminal. This is a more serious problem considering that the disk rotates at a high speed of several thousand revolutions / second. A further serious problem is that it is very difficult to place a plurality of longitudinal contact terminals in the clamper recesses with high accuracy in such a narrow space, each having a coil spring, and these contact terminals are arranged on the disk. It is extremely difficult to accurately align with ring-shaped terminals installed at narrow intervals, and practically impossible to put into practical use.

  Furthermore, electrical contact with the ring-shaped terminal is possible only after being biased downward by the contact terminal coil spring 618. However, when the coil spring deteriorates due to long-term use, the space and the structure are complicated. The contact pressure may change and the electrical connection characteristics may deteriorate.

  In addition, since the solid-state memory is embedded in the disk, the manufacturing process is complicated, and the lead wire must be embedded in the disk together with the solid-state memory. Further, the ring-shaped terminal is connected to the lead wire exposed on the surface. It must be formed with high precision in the radial direction, which not only significantly increases the cost, but also makes it impossible to replace the solid memory once embedded.

  In addition, since it is efficient in manufacturing that the lead wire taken out from the solid-state memory is arranged directly above, a ring-shaped terminal is usually provided directly above the solid-state memory. It is difficult to dispose the ring-shaped terminals to be connected apart from each other, which is a major factor in complicating the structure and increasing costs.

  Furthermore, since the solid-state memory is embedded in a disk having a thickness of about 1 mm at most, a serious problem arises for a semiconductor that is vulnerable to external shocks. The disk surface where the solid-state memory is embedded has the tip of the contact terminal urged by the spring spring in the recess of the clamper always abutting against the point contact pressure, especially when the disk is clamped for the first time. This gives an impact to the embedded solid state memory. Since such an impact is applied to the solid-state memory every time the disc is reproduced and recorded by the disc drive device, the influence on the solid-state memory cannot be overlooked, and there is also a problem in terms of extending the life.

  Further, in this structure, the electrical connection with the solid-state memory is limited to the clamper side, and electrical contact on the opposite surface side is impossible, and the degree of freedom in design is low.

  SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a disk drive device, a disk drive method, and a disk that can solve the above-mentioned problems and enable reliable transmission and reception of signals between the disk side and the disk drive device side with a low cost and simple configuration. It is to provide.

  Another object of the present invention is to provide a disk drive device, a disk drive method, and a disk having a simple and low-cost configuration that can reliably transmit and receive electrical signals between the disk and an external device, thereby significantly improving the expandability of the disk utilization field. Is to provide.

  Still another object of the present invention is to provide a disk drive device, a disk drive method, and a disk that enable reliable transmission and reception of a plurality of signals between the disk side and the disk drive device side with a low cost and simple configuration. .

  It should be noted that the present invention means all modes of signal exchange between the disk side and the disk drive device side, and all electrical information such as “transmission”, “reception”, “transmission and reception”, signals, power, etc. Including the mode of communication.

  In order to solve the above-described problems, the disk drive device, the disk drive method, and the disk according to the present invention employ the following characteristic configuration.

(1) A disk having a plurality of first conductive parts electrically connected to a mounted electronic function part and spaced apart in the circumferential direction is placed on a turntable, and the disk is contacted and gripped. It is configured to access the disk by rotational driving,
A disk drive device in which a plurality of second conductive portions that are in electrical contact with the plurality of first conductive portions are provided in the contact gripping portion of the disk.
(2) On the turntable of the disk drive device, an electronic function unit is mounted, a disk having a plurality of first conductive parts electrically connected to the electronic function unit is placed, and the disk is gripped A plurality of second conductive parts that are in electrical contact with the first conductive parts at least in a part of the contact gripping part of the disk at the time of the rotational drive, and the first conductive parts and the A disk drive method for transmitting and receiving signals between second conductive portions.
(3) The disk drive device according to (1), further including positioning means for specifying a contact positional relationship between the plurality of first conductive parts and the second conductive parts.
(4) The positioning means is provided with a protruding portion that protrudes in a radial direction at a protruding portion that fits into a central opening hole of the disc, and the disc is provided with a slit that fits into the protruding portion. The disk drive device according to (1) above.
(5) A first conductive portion is formed on the inner peripheral wall of the central opening hole of the disk, contacts the inner peripheral wall, and is formed on the outer peripheral surface of the protrusion that fits into the central opening hole of the disk. (1) The disk drive device according to (1) above, in which a conductive portion is formed.

  According to the present invention, reliable signal transmission / reception between a disk and a disk drive device is enabled, thereby enabling reliable transmission / reception of an electrical signal between the disk and an external device, that is, information recorded on the disk. Read and write to the disk, as well as one or more electronic circuits mounted on the disk (including the configuration necessary for circuit operations such as signal processing circuits and memories, batteries, etc., collectively called electronic functions Signal transmission / reception between the external device and the external device can be performed with a simple configuration. In addition, other functions such as power supply to the battery mounted on the disk can be achieved easily and reliably. Therefore, it becomes possible to define a unique operation based on the function of one or a plurality of electronic circuits formed on each disk, and the expandability of the application field using the disk is remarkably improved. In addition, by simply forming an electronic circuit such as a thin film IC on the surface of a normal disk and a conductive part such as a thin film electrically connected to the electronic circuit, a disk having a new configuration that can significantly extend its application range is minimized. It can be obtained with a limited cost increase. In addition, a disk drive for accessing such a disk only needs to be added with a simple configuration, and a disk drive device with a minimum cost increase can be obtained. Such an effect is particularly remarkable when using an optical disc that is extremely inexpensive and can provide a large recording capacity. According to the present invention, signal exchange between the disk and the disk drive device can be performed at high speed and stably with almost no restrictions on the speed and data amount.

  In particular, according to the present invention, a conductive part connected to the disk-mounted electronic circuit even when the disk is rotating, and a holding and gripping part for rotating the disk of the disk drive (electrical contact formed at least partially) Are electrically connected in direct contact with each other, and the conductive part on the disk side and the disk drive side is gripped and clamped with a strong pressure contact force (usually surface pressure), so stable and reliable electricity Connection is obtained. There is no problem with radio interference due to the metal film formed on the disk surface or surrounding metal parts, and there is no risk of wiretapping caused by radio leakage due to external radio waves, etc. And there is no restriction on signal transmission / reception (communication) speed.

  Furthermore, in the present invention, it is possible to easily obtain a configuration in which the disk and the conductive portion on the disk drive device side are strongly contacted by a spring force such as a clamp member. In addition, a variety of application fields can be obtained by using these various connection modes simultaneously or in combination.

  In the present invention, any conductive part electrically connected to the electronic circuit can be formed by forming a thin film on the disk surface, and the conductive part directly in surface contact with the conductive part thin film is on the clamper or the turntable. This is an extremely simple configuration. In addition, the conductive part formed on the clamper or turntable is configured to directly receive the clamping, gripping and holding pressure necessary for rotation and to come into surface contact with the conductive film on the disk side. Not only can the same clamping pressure be obtained, but also the electrical contact by surface contact is reliable, and even if the relative positional relationship between the disc and the clamper or turntable is deviated, the electrical contact between them is hardly affected. Absent.

  That is, since the electrical connection is made by electrical contact between the conductive portion in the clamp (gripping and holding) region for driving the disk to rotate and the conductive portion on the disk drive device side, a reliable connection is possible. Including the above, this effect is a big difference from the structure of Patent Document 6. In other words, in Cited Document 6, a ring-shaped terminal having a sharp tip that is biased downward by a coil spring is in electrical contact with an electrode on the surface of the disk, and this ring-shaped terminal is used for rotating the disk. It does not have the function of gripping, holding and clamping the disc. It is the direct contact portion of the clamper 615 with the disk that performs the clamping function. Therefore, the electrical connection relationship between the ring-shaped terminal and the electrode on the disk surface in Patent Document 6 is not only inferior to that of the present invention, but also includes many problems described above.

  Further, the connection with the other part of the conductive part is not required at all, and it is only required to be connected, and the arrangement of the solid-state memory and the conductive part can be arbitrarily provided at an appropriate position according to the application.

  Further, in the present invention, the electronic circuit or the like is disposed at a position where it does not come into contact with the clamper or turntable on the disk drive device side, that is, it is not subjected to any clamping pressure. There is no point contact pressure or clamping pressure from the tip of the contact terminal biased by the spring spring, and no impact is applied to semiconductor circuits or chips that are vulnerable to impact, thus extending the service life. I can plan.

  Furthermore, in the present invention, the conductive connection between the turntable and the clamper side (clamp member, protrusion outer peripheral wall) is possible, and even when the electronic circuit is mounted on both sides of the disk, Significant expansion is possible.

It is a top view which shows typically the structure of the optical disk in the Example of this invention. It is a top view which shows typically the structure of the optical disk in the other Example of this invention. 1 is a schematic cross-sectional view schematically illustrating a configuration of an optical disk drive device according to an embodiment of the present invention. It is the schematic schematic sectional drawing for demonstrating the structure of the optical disk drive device by the other Example of this invention. FIG. 6 is a schematic cross-sectional view of a main part schematically illustrating a configuration of an optical disk drive device according to another embodiment of the present invention. FIG. 10 is a schematic cross-sectional view of a main part schematically illustrating an optical disc and a configuration of an optical disc drive apparatus according to still another embodiment of the present invention. FIG. 6 is a schematic cross-sectional view of a main part schematically illustrating the configuration of an optical disc and an optical disc drive apparatus according to another embodiment of the present invention. It is a top view which shows typically the structure of the optical disk in the Example of this invention. It is a partial perspective view which shows typically the structure of the optical disk drive device in the Example of this invention. It is a partial perspective view which shows typically the structure of the optical disk drive device in another Example of this invention, and an optical disk. It is a partial perspective view which shows typically the structure of the optical disk drive device in another Example of this invention, and an optical disk. 1 is a schematic cross-sectional view of a main part schematically illustrating a configuration of an optical disk drive device according to an embodiment of the present invention. FIG. 6 is a schematic cross-sectional view of a main part schematically illustrating a configuration of an optical disk drive device according to another embodiment of the present invention. FIG. 10 is a schematic perspective view of a main part schematically illustrating an optical disc and a configuration of an optical disc drive apparatus according to still another embodiment of the present invention. It is a perspective view which shows typically the structure of the optical disk in the other Example of this invention. It is a perspective view which shows typically the structure of the optical disk in the further another Example of this invention. FIG. 6 is a schematic cross-sectional view of a main part schematically illustrating a configuration of an optical disk drive device according to another embodiment of the present invention. FIG. 6 is a schematic cross-sectional view of a main part schematically illustrating a configuration of an optical disk drive device according to still another embodiment of the present invention. FIG. 10 is a schematic cross-sectional view of a main part schematically illustrating a configuration of a conventional optical disk drive device.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Optical disk 2, 2A-2C, 105, 107, 107A-107C, 201 Conductive part 3, 3A-3C, 3AB, 3AC Connection line part 4, 4A-4C Electronic circuit 4D Battery 5 Opening hole 6 Slit 7, 108 Antenna 100 Turntable 101 Protruding portion 102 Rotating shaft portion 103 Rotating drive portion 104 Placement portion 106 Electrical connection line 110 Magnet 120 (120A to 120C) Clamp member 200 Clamper 210 Opening portion 220 Recess portion 301, 302 Connection interface portion 400 Printed circuit board 500 Housing Top

  Such an effect is not limited to the disk and the disk drive device, and can also be obtained between the rotation member and the rotation member that rotates while rotating the contact member. Other effects of the present invention will become apparent in the description of the following examples.

Hereinafter, specific configuration examples of embodiments of the present invention will be described with reference to the drawings.
The present invention is directed to a rotary storage medium and a drive device that exchanges signals by rotationally driving the medium. Hereinafter, an example in which an optical disk is used as a disk will be described. Also, any disk or card (eg, CD, DVD, MO, FD, HD, etc.) may be used for the disk that is firmly held, held, clamped and rotated by the holding and holding means of the disk drive device. However, the optical disk will be described below. In a broader concept, the present invention is not limited to a disk and a disk drive device, and can be similarly applied to a rotating body and a rotation driving unit in a rotation driving unit that rotates a rotating body by contact gripping and holding. In the following drawings, only simplified main parts are shown for easy understanding and explanation, and the size, positional relationship and the like are not shown accurately.

  A disk to which a disk drive device according to the present invention is applied is a disk on which an electronic circuit or the like is mounted, and a disk configuration showing an example thereof is shown in FIG.

  In FIG. 1, a recording area (RAM area, ROM area as a program recording unit storing a predetermined program, etc.) in which data such as images, music, and images are recorded is formed on the surface of the optical disc 1. Yes. There is a non-recording area in which no information is recorded inside the recording area in the radial direction. In addition, an electronic circuit 4 that executes signal processing designed based on an electronic function unit, for example, a program stored in a ROM area or other memory or designed uniquely is formed in an arbitrary portion. As will be described later, the electronic circuit 4 includes various configurations, and can include any components necessary for electronic processing such as a CPU and a memory, and any components such as a battery. It is desirable that the IC chip be configured. In this example, the inner peripheral portion of the optical disc (usually a transparent portion but an opaque portion) at a position corresponding to a portion held in contact by a clamp mechanism (a broad concept including holding and gripping by chucking) of the disc drive device. For example, a thin-film conductive portion 2 is formed on at least a part of a portion where the disc is gripped, held, and clamped (clamp region), and inside the clamp region on the inside thereof, An electronic circuit 4 is connected through a connection part 3 electrically connected to the conductive part 2. Here, the portion of the optical disk 1 that is contacted and held by the clamp (holding and gripping) mechanism by the disk drive device means that the optical disk 1 is firmly held and held without slipping or slipping when the optical disk is rotated by the disk drive device. It is clear from the gist of the present invention that all the parts are included and are not limited to the examples described below.

  Although the electronic circuit 4 can be provided at an arbitrary position, the disk is usually held with high adhesion by a gripping, holding, and clamping (chucking) mechanism of the disk drive device, so that the influence of the pressure is avoided. The clamp member (arbitrary clamp mechanism such as a turntable, clamper, clamp member, etc., which will be described later) is not directly in contact with the portion to be clamped, and is not provided with a clamping pressure. Yes. In addition, as shown in FIG. 2, the electronic circuit 4 can be provided at a position in the outward direction (preferably a non-recording area) rather than the clamp part. However, in the case of a configuration in which there is no problem of the clamping pressure, it may be formed in the clamping region. Of course, the conductive part 2 itself may be set at the same site as the electronic circuit 4, for example, so that the electronic circuit 4 includes the conductive part 2. In short, the connection unit 3 only needs to exist functionally, and does not necessarily require physical existence.

  The electronic circuit 4 is, for example, a circuit that executes an operation process based on a program recorded in a ROM area on the optical disk surface, and the processing result is transmitted to the disk drive device side in the form described below. Conversely, it receives a signal from the disk drive apparatus side. As described above, the electronic circuit 4 may be configured to perform an operation based on a program recorded in another recording medium, or may be configured to execute a predetermined operation. As a matter of course, it is assumed as a premise, and the configuration thereof is arbitrary. Further, the electronic circuit may be any input / output as long as it is an electrical signal, and the processing is arbitrary such as optical processing.

  For example, when the information recorded in the recording unit is encrypted, the predetermined processing of the electronic circuit 4 is based on a program that reads the encrypted information and is stored in the ROM area. There is a process to decipher. Similarly, when writing with encryption, it is also possible to perform encryption based on the encryption program recorded in the recording unit.

  Here, if an encryption program and a decryption program are defined for each optical disc, closed signal processing that does not require any external information is possible for each optical disc, and processing based on the closed unique processing As long as it is not, access to the disk is difficult and high security can be ensured. Further, if a key for decryption is individually set from the outside, higher security can be secured. Furthermore, the processing according to the program recorded in the ROM area can be executed by the electronic circuit, or the processing result processed by the external processing circuit can be recorded in the recording unit. In this way, the processing result is stored and recorded only in the RAM area as the recording unit of the optical disk without remaining in the external processing device, and the data to be stored and recorded is subjected to processing such as encryption by an electronic circuit. In this case, a third party cannot obtain decryption data unless there is a decryption program including key information for decrypting the encrypted data, and an extremely high security system can be realized. In addition, signal transmission / reception between an electronic circuit or the like formed on an optical disk and an external circuit can significantly expand the field of use that has not been envisaged. In other words, since the electronic circuit has a unique processor function as a CPU, a function as a memory, an execution function of a unique processing mode, etc., it can be expanded to fields of use that have not been envisaged in the past, functionally and organically related to the disk. Is possible.

  Returning to FIG. 1, for example, a thin ring-shaped conductive portion 2 is formed on the inner peripheral portion of the optical disc 1. The conductive portion 2 may be electrically connected to the electronic circuit 4 via the connection portion 3 (also formed as a thin film on the surface of the optical disc 1), or may be a portion having information independently. it can. For example, if this conductive part 2 has some information on the optical disk (such as disk-specific information), the information can be acquired directly from the disk drive device. The electronic circuit 4 as the electronic functional unit can be a functional unit having a function of generating, writing or storing some electronic information, or a functional unit or an electronic circuit in which the conductive unit itself generates some information. It may be included. On the contrary, the electronic function part may include a conductive part, and the conductive part 2 can be given meaning in an electrical relationship with the outside. There is no need for an electronic function unit (electronic circuit). The electronic function part (electronic circuit) and the conductive part may be formed on the same surface as the recording area formation surface of the disk or on the opposite surface. When formed on the opposite surface, these electronic circuits do not exist when the recording area is accessed by a pickup or the like, so there are no restrictions on the mounting positions of components such as electronic circuits, and the degree of freedom in design is expanded. . In short, the electronic circuit may be a functional unit that receives and outputs electrical signals.

  The optical disk 1 is placed on a turntable of a disk drive device, is gripped, held, and clamped by a clamp mechanism, and is rotationally driven by a spindle motor. Usually, the recording area where the information of the optical disk is recorded is formed in a region other than the non-recording area of the inner peripheral portion of the optical disc 1, and the inner peripheral portion is a transparent portion, a semi-transparent portion or an opaque portion. It is used only as a part for. In the present embodiment, the conductive portion 2 is formed in at least a part of the clamp region of the predetermined portion of the inner peripheral portion.

  The above description assumes that the electronic circuit 4 as the electronic function unit is fixedly mounted on the disk surface, but a configuration in which the electronic circuit 4 can be mounted on the disk in an appropriately replaceable manner is also useful. In this case, a locking portion for mounting and locking the electronic circuit (chip) is provided at the mounting position of the electronic circuit on the disk, and the previously used chip (electronic circuit) is removed from the locking portion to newly install a new one. A chip may be attached and locked. The connecting portion 3 is fixedly disposed and connected to the locking portion.

  According to this configuration, when a mounted electronic circuit fails, it is replaced with a new electronic circuit. In addition, an electronic circuit and an electronic function unit specific to the user and the disk can be easily mounted. For example, it is possible to have different information such as encryption information and ID information for each user.

  FIG. 3 is a simplified cross-sectional view of the main part for explaining the configuration of the disk drive apparatus according to the embodiment of the present invention.

  Referring to FIG. 3, the turntable 100 is rotationally driven by a rotational drive mechanism 103 such as a spindle motor. A magnetic pole is provided on the lower surface of the turntable 100, and a rotation driving unit 103 having a magnetic pole is provided at a lower facing position thereof. The magnetic pole of the rotation driving unit 103 is changed so that the turntable 100 is centered on the rotation shaft unit 102. Drive to rotate. As such a rotation driving means, a thin flat motor configuration such as a rotation mechanism including a stator and a rotor can be used.

  The turntable 100 has a protruding portion 101, and the opening hole 5 of the disc 1 is inserted into the protruding portion 101, and the center position of the disc 1 is aligned. On the outer peripheral portion of the turntable 100, there is provided a placement portion 104 on which the disk 1 is placed and the surface thereof is made of an elastic material that is difficult to slide. Needless to say, the placement unit 104 may not be provided, and the disc may be placed directly on the turntable 100. In this case, the electronic circuit 4 is preferably mounted at a position where a clamper 200 described later does not contact (see FIG. 4 described later).

  A conductive portion 105 (on the mounting portion 104) is formed at a position facing the conductive portion 2 of the disk 1 of the turntable 100. The conductive portion 105 may be formed as a thin film, or may be configured such that the conductive portion is embedded in the turntable 100 (mounting portion 104).

  A permanent magnet 110 is usually provided on the top of the protrusion 101. A conductive part 105 is formed on the surface of the turntable 100 at a position facing the conductive part 2 of the optical disc 1. However, in FIG. 3, the conductive part 105 is simplified for ease of understanding. Although the thickness and size of these are drawn larger than those of other components including the optical disc 1, the conductive portions 2 and 105 are shown as thin films, and in practice, the thickness is hardly conscious. . In addition, at least one of the conductive portions 2 and 105 is desirably formed in a ring shape in the entire circumferential direction, but may be formed only partially. Preferably, if both are ring-shaped, more reliable electrical contact can be obtained.

  On the other hand, a clamper 200 is disposed above the optical disc 1. The clamper 200 is provided with a magnetic part (not shown, the clamper itself) that is attracted by receiving the magnetic force of the permanent magnet 110 at a part facing the permanent magnet 110 provided on the top of the protruding part 101 of the turntable 100. Have. After the optical disk 1 is placed on the turntable 100, when the clamper 200 is brought closer, the clamper 200 is brought into close contact with the turntable 100 with the optical disk 1 sandwiched by the magnetic force between the permanent magnet 110 and the magnetic material (clamper). In this way, the optical disc 1 is gripped, held, clamped (chucked) in a state where the concentricity is maintained, and is rotationally driven along with the rotation of the rotary shaft portion 102 that is in surface contact. Here, in this embodiment, an example is shown in which the clamper 200 rotates integrally with the turntable 100, but unlike the clamper 200, a gap is provided in a housing that does not rotate integrally with the optical disc, It is also possible to provide a magnetic member that is in close magnetic contact with the permanent magnet 110 and that freely rotates together. In short, clamping means all means for contacting and holding the disk in order to rotate the disk as a rotating body, and the clamp part indicates the part to be held (gripped). In this embodiment, the contact gripping means includes a turntable 100 and a clamper 200.

  At this time, the conductive portion 2 of the optical disk 1 and the conductive portion 105 on the turntable 100 side on the disk drive device side are strongly in close contact with each other by a clamping force such as a magnetic force, and a reliable electrical connection is established and maintained. Therefore, the conductive portion 2 on the optical disc 1 side and the conductive portion 105 on the turntable 100 side on the disc drive device side independent of the optical disc 1 are reliably electrically connected. Of course, the connection to the conductive portion 2 of the optical disk 1 on the disk drive device side is not limited to the turntable 100, and any part may be used as long as the optical disk 1 is gripped and held and rotated integrally and electrically contacted.

  The conductive unit 105 on the disk drive device side is connected to an external circuit, for example, a circuit inside the disk drive device (for example, a signal is exchanged with an external personal computer or the like on the printed circuit board 400). The connection between the conductive portion 105 and the internal circuit is provided at a connection interface portion 301 provided at the distal end portion of the rotating shaft portion 102 that rotates the turntable 100 together with the optical disc 1, and at a distance from the connection interface portion 301. And the connection interface unit 302 connected to the printed circuit board 400 of the internal circuit. Connection from the conductive unit 105 to the connection interface unit 301 can be performed by an electrical connection line (wire) 106 provided inside or along the outer periphery of the rotating shaft unit 102.

  Connection between the connection interface units 301 and 302 can be performed by electrical connection such as a slip ring without separating the connection interface unit 302. This is effective when power is supplied to the electronic circuit on the disk 1 side with less noise. Also, photoelectric conversion means such as photodiodes provided in the connection interface units 301 and 302, wireless means having an antenna, or the like can be used. In the embodiment described below, a photodiode is provided in each of the connection interface units 301 and 302, and an electrical signal from the conductive unit 105 is converted into an optical signal by the photodiode on the connection interface unit 301 side to be connected to the connection interface unit 302. Light is transmitted to the side photodiode.

  The optical signal received by the photodiode of the connection interface unit 302 is converted into an electrical signal, and the converted electrical signal is sent to the circuit unit of the printed circuit board 400. Conversely, when an electrical signal from the printed circuit board 400 is sent to the electronic circuit 2 of the disk 1 via the conductive part 105 of the turntable 100 and the conductive part 2 (or connection part 3) of the disk 1, the signal is transmitted through the same path. Sending is performed. As described above, the connection by the photoelectric conversion means and the wireless means provided close to the rotation axis center (along the rotation axis) of the rotation shaft portion 102 can be connected (communication) even if the intensity of light or radio wave is weak. In addition, there is almost no risk of leaking to the outside, and the influence of external interference and noise can be extremely reduced, which is also effective in terms of security.

  That is, installation of the photoelectric conversion means and the wireless means along the axis of the rotating shaft portion 102 requires less blurring of the signal light due to the rotation of the rotating shaft portion, and when signal transmission / reception is performed by the wireless means. Efficient transmission / reception becomes possible. These are also applied to all of the following embodiments, and similar effects can be obtained.

  FIG. 4 shows a modification of the embodiment shown in FIG. 3, in which the electronic circuit 4 on the disk 1 is provided not on the inside of the conductive portion 2 but on the outside (non-recording area) via the connecting portion 3. In this case as well, no force is applied to the electronic circuit 4.

  FIG. 5 is a simplified cross-sectional view of an essential part for explaining the configuration of a disk drive device showing another example of the embodiment shown in FIG.

  In the present embodiment, a connection interface unit 301 provided on the projecting part 101 side (upper part), not on the rotating shaft part 102 side, to transmit / receive signals from the conductive part 105 on the turntable 100 side to the circuit on the disk drive device side, For example, the connection interface unit 302 provided on the housing upper surface 500 side of the disk drive is used. Similar to the above-described embodiment, the connection interface unit 301 is provided at a substantially central portion (along the central axis) of the rotation axis of the projecting portion 101, and the connection interface unit 302 is disposed to face the connection interface unit 301.

  Also in this example, the connection interface unit 301 provided on the top of the protrusion 101 and the conductive unit 105 are electrically connected via the electrical wiring 106. On the other hand, the facing portion of the connection interface portion 301 of the clamper 200 is opened electrically, optically, or wirelessly as described above. For example, the slip ring is formed between the connection interface portions 301 and 302 at the opening 210. It can be set as the structure connected by. In addition, a configuration in which a hole is provided so as to allow light to pass therethrough, a transparent material, or a material that transmits radio waves can be used. A connection interface unit 302 is provided on the side opposite to the connection interface unit 301, and signals are exchanged between the connection interface units 301 and 302.

  FIGS. 6A and 6B are a simplified cross-sectional view for explaining a configuration of a disk drive device showing another embodiment of the disk drive device according to the present invention and a partial perspective view of the disk. is there.

  The present embodiment is an example in which the electronic circuit 4, the connection portion 3, and the conductive portion 2 mounted on the disk are provided on the side (upper surface) opposite to the embodiment as shown in FIGS. In this embodiment, data such as normal music and video is recorded on the lower surface of the disk, and an electronic circuit 4 and the like are formed on the upper surface. Therefore, as compared with the case where an electronic circuit or the like is provided on the lower surface of the disk on which the access operation of the optical pickup is performed, the electronic circuit or the like is provided on the upper surface without any restriction on the access operation or the like. The mounting location of the components is arbitrary, and the degree of freedom of design is greatly improved.

  In FIG. 6, for example, a thin-film conductive portion 201 is provided at a portion of the clamper 200 that clamps the disk 1, that is, a portion where the clamping pressure is directly applied to the disk 1 as a surface pressure. The conductive portion 201 is integrally coupled to the clamper 200, and the clamping force of the disk 1 by the clamper 200 is directly transmitted as the clamping surface pressure. Therefore, the conductive portion 2 of the disk 1 and the conductive portion 201 of the clamper 200 are in surface contact, and both conductive portions are subjected to clamping surface pressure, so that reliable and stable electrical contact can be obtained. The conductive portion 201 is connected to the connection portion 301 similar to the above-described embodiment provided near the rotation center axis position on the upper surface of the clamper 200 by the electric wiring 106 along the inside or the outer surface of the clamper 200. For example, as described above, the connection between the connection interface 301 and the similar connection interface unit 302 disposed on the upper surface 500 of the housing is opposite to the connection unit 301. Optical connection by photoelectric conversion means, wireless connection by wireless means, and the like can be used.

  Here, the contact surface of the clamper 200 with the disk 1 is arbitrary, and the entire surface facing the disk 1 can be brought into contact or only a part can be brought into contact with the clamper surface. For example, if only the outer peripheral portion is a clamper surface and the inner peripheral side is a concave portion, the electronic circuit 4 or the like of the disk 1 can be disposed in the concave portion, and no clamping pressure is applied to the electronic circuit 4 or the like. it can.

  The clamp area is a portion to which a clamping force that directly contacts and holds and holds the disc 1 is directly applied. To be precise, in FIG. The part where the disk 1 directly abuts is the surface part of the placing part 104, but the case where the placing part 104 is not present or the placing part 104 is thin and the entire turntable 100 is substantially in contact with the disk 1. Including the clamp area. It is clear from the gist of the present invention that the clamping region means a region where a clamping force is substantially directly applied.

  Also in this embodiment, the shape and dimensions of the conductive portions on the disk side and the clamper side are arbitrary as long as they are in electrical contact during clamping, and both are ring-shaped (annular). Alternatively, only one can be ring-shaped, the other arc-shaped, and an arbitrary shape with a predetermined length.

  FIG. 7 is a simplified cross-sectional view of the main part and a perspective view of the main part of the disk for explaining the configuration of the disk drive apparatus showing still another embodiment of the disk drive apparatus according to the present invention. Since the omitted part can adopt the same configuration as in the previous embodiment, the description thereof is omitted.

  In the present embodiment, as a means for clamping (holding and holding necessary for rotation) the disk in the above-described embodiment, the inner peripheral portion of the opening hole 5 of the disk is pressed (locked) from above and between the turntable 100. A clamping member for gripping, holding and clamping is used.

  In this embodiment, as shown in FIG. 7A, a plurality of clamp members 120 (120A to 120C) are provided in the outer peripheral direction of the projecting portion 101 of the turntable 100 (for example, three at equal intervals) A bias is applied in the outer diameter direction by a spring member (not shown) provided in the protruding portion 101, and the optical disk is pushed in from the top against the spring force by the spring member and fixed in contact. In other words, when the central opening hole 5 of the disc 1 is pushed into the protruding portion 101 from the upper direction against the spring force of the clamp member 120 and the disc 1 is placed on the placement portion 104 of the turntable 100, the clamp member 120 is Once retracted inside (inside the dotted line), the disk 1 enters the upper surface of the disk 1, and the disk 1 is firmly fixed between the clamp member 120 and the turntable 100. The disk drive device having such a configuration is simpler and thinner because the clamper 200 is not required as compared with the above-described embodiment, so that it is suitable for downsizing and cost reduction. It is often applied to such a small electronic device. A conductive part is formed in at least a part of the contact part of the clamp member 120 with the disk 1 and performs the same function as the conductive part 105 and the like. The configuration of the clamp member can optionally be retracted inward in response to a user operation such as a button. Incidentally, the recording area and the non-recording area in FIGS.

  In this embodiment, as shown in FIG. 7B, a ring-shaped conductive portion 2 is formed in a circumferential region (shaded portion) of the inner peripheral end portion of the opening hole 5 of the disk 1. An electronic circuit 4 that is electrically connected via the connecting portion 3 is mounted on the upper surface of the disk 1. An information recording surface is formed on the turntable 100 side (the lower surface of the disk) of the disk 1 and information is written and read by an optical pickup. On the other hand, the electronic circuit 4 and the like are mounted on the upper surface of the disk, so There are no physical restrictions such as a pickup drive mechanism, and there is no restriction on the mounting location. For example, there is no part to which the clamping pressure is applied on this upper surface, so there are multiple electronic circuits etc. Is expanded. If the conductive portion 2 is formed on the inner peripheral wall of the opening hole 5 in addition to the circumferential region at the inner peripheral end of the disk opening hole 5, more reliable electrical contact can be obtained.

  When the disc 1 shown in FIG. 7B is placed on the turntable 100, the conductive portions of the three clamp members 120 </ b> A to 120 </ b> C are pressed against the inner peripheral end conductive portion 2 of the opening hole 5 of the disc 1. 1 is gripped and held (clamped) with the turntable 100. Electrical wires (wiring wires) 106 are connected to the clamp members 120A to 120C (conductive portions), and are connected to a connection interface portion 301 provided on the top of the protruding portion 101, as in the above-described embodiment. The configuration of the clamp member 120 (120A to 120C) is arbitrary, and it is desirable that the clamp member 120 has a shape and a structure that ensure reliable and stable electrical contact with the conductive portion 2 of the disk 1. For example, it is desirable that the contact area of the disk 1 with the conductive portion 2 is large, and the contact part of the clamp member 120 with the disk side is made as horizontal as possible, or the contact surface is made of an elastic material to increase the contact area during clamping. You can also.

  8 and 9 are simplified perspective views of a disk and a disk drive device in which a plurality of (three in this example) clamp members 120A to 120C are provided on the outer peripheral wall of the protrusion 101 on the turntable 100 side. . In this example, conductive portions 2A to 2C that are electrically isolated corresponding to the clamp members 120A to 120C are provided on the inner peripheral portion of the opening hole 5 of the disk 1, and the connection portions 3A to 3C are respectively connected. To the electronic circuits 4A to 4C. In this example, the electronic circuits 4 </ b> A to 4 </ b> C are provided in an area where there is no recording area opposite to the recording surface of the disk 1.

  Three clamp members 120A to 120C are provided on the outer periphery of the protruding portion 101 at predetermined intervals (equal intervals in this example). The clamp members 120A to 120C are connected to the connection interface portion 301 via electric wirings 106A to 106C, respectively. Connected to. Therefore, when the disc 1 is mounted on the turntable 100, the disc 1 is clamped by the turntable 100 and the clamp members 120A to 120C, and the clamp members 120A to 120C come into strong contact with the conductive portions 2A to 2C of the disc 1, respectively. Will be connected.

  Signals sent through these three electric wirings 106 </ b> A to 106 </ b> C are sent from the connection interface unit 301 to the connection interface unit 302. In this case, three signals can be electrically or optically multiplexed and transmitted from the connection interface unit 301.

  In the above-described embodiments, it may be necessary to define the correspondence between each of the plurality of electronic circuits and the clamp member that is electrically connected. For example, when the signal transmission / reception relationship between the electronic circuits 4A to 4C on the disk shown in FIG. 8 and the clamp members 120A to 120C, that is, a specific circuit unit such as a disk drive device or an external device (personal computer) is specified. The electrical connection between the electronic circuit and the corresponding specific circuit needs to be fixed. Various means are conceivable for this purpose. For example, the disk 1 and the turntable 100 can be respectively marked, or a physical specific shape portion can be provided, and positioning can be performed according to the relative relationship between these physical specific shape portions. It is also possible to determine an electrical and magnetic relationship between the two and to position them according to the relationship. For example, a magnet can be provided in each, and uniform positioning can be performed by the magnetic force of both magnets.

  In FIG. 10, as the positioning mechanism, a slit 6 is formed in a radial direction at a predetermined portion of the inner peripheral portion of the disk 1, while a convex portion into which the slit 6 enters the outer peripheral wall of the protruding portion 101 of the turntable 100. 130 is provided, and the convex portion 130 is inserted (fitted) into the slit 6 of the disk 1 so that the corresponding positional relationship between them can be uniquely positioned. Here, the positioning is such that the corresponding conductive portions are in reliable contact with each other, and since the width of the conductive portions is relatively wide, the arrangement positions of the slits 6 and the convex portions 130 need not be highly accurate. .

  Switching means for receiving the outputs from the clamp members 120A to 120C without unambiguously positioning the disk and the turntable is provided in the middle of the path from the conductive parts 2A to 2C and the connection interface part 301, and corresponding signals are sent. It can also be configured to selectively send to the connection destination. In this case, the received signal can be discriminated and sent to the connection destination based on the discrimination result. Of course, this switching means can be provided on the external circuit side.

  Of course, such positioning and switching methods are not limited to these embodiments and the embodiments described later, and when associating a plurality of electronic circuits with a plurality of corresponding electrical parts on the disk drive device side. Obviously all are applicable.

  7 and 9, the disk 1 is clamped by being fitted into the projecting portion 101 of the turntable 100 in the opening hole 5 of the disk 1, and the disk 1 is driven to rotate by the function of the rotation driving unit 103. The disc 1 is placed on the placement portion 104 of the turntable 100, and the disc 1 is clamped and driven to rotate by the clamp members 120A to 120C. At the time of clamping, the clamp members 120A to 120C that are electrically connected to the corresponding conductive portions 2A to 2C of the disk 1 are disposed inside or along the protruding portion 101, the turntable portion 100, and the rotary shaft portion 102, respectively. The connection interface unit 301 provided at the distal end portion of the rotating shaft unit 102 is connected through the corresponding wiring units 106A to 106C. The above-described connection interface unit 302 is provided on the housing side of the disk drive device at a portion facing the connection interface unit 301, and these are connected electrically, optically, or wirelessly.

  In such a structure, the clamp member 120 (120A to 120C) on the disk drive device side is in strong pressing contact with the conductive portion 2 of the optical disk 1, so that the electrical connection between them is reliably performed. That is, since the conductive portion of the clamp member 120 is in electrical contact with the conductive portion 2 formed on the inner end side of the disk opening hole 5, the clamp members (generally locking members) 120A to 120C are also provided. There are a plurality of circumferentially provided parts, and the same conductive part of each disk is similarly pressed with a very strong force, so that the stability of contact and electrical connection is high. In this configuration, the conductive portion can be formed separately on the innermost peripheral portion (along the opening hole) of the disk, and the electronic circuit can be provided at a position where it does not come into contact with the clamp member as the separate portion.

  It is desirable that the structure and shape of the clamp member be appropriately selected in order to obtain more reliable electrical contact. Select a structure or material that gives the contact part of the clamp member elastic characteristics, or that makes contact with the conductive part provided at the inner peripheral edge of the opening hole of the disk after the disk has been pushed in with as much contact area as possible. Can do. Since the clamp member in such a structure is repeatedly used, a material and a shape that can withstand repeated pressing and use are desirable.

  FIG. 11 is a perspective view of a main part of a disk and a turntable for explaining a disk drive device and a disk according to still another embodiment of the present invention.

  In this embodiment, the conductive portion 2 is formed on at least a part (the entire surface in this example) of the inner peripheral wall surface of the central opening hole 5 of the optical disc 1, and this conductive portion 2 is connected to the electronic circuit 4 via the electrical connection portion 3. On the other hand, the conductive portion 107 is provided on at least a part (the entire surface in this example) of the outer peripheral surface portion of the protrusion 101 of the disk drive device, and the central opening hole 5 of the optical disk 1 is formed in the protrusion 101. By inserting and fitting, the two conductive parts 2 and 107 are configured to be in electrical contact with each other. In a broad sense, in this case as well, a conductive portion is formed in the clamp, holding, and gripping portion of the optical disc, and reliable and stable signal exchange is performed with a simple configuration. For more reliable clamping, the clamp member 120 (120A to 120C) or the clamper 200 as described above can be used. In that case, since the clamp member 120 and the clamper 200 are not used as a conductive portion, it is desirable to use an insulator or to insulate the surface portion, but it is also possible to use it as a conductive portion. In this case, the electrical connection path through the conductive part 105 on the turntable 100 side, the conductive part 201 of the clamper 200, the clamp member 120, etc. can be used together. By using such a plurality of paths, various usage forms can be applied by making one as a backup.

  If the protruding portion 101 has a substantially conical shape that narrows toward the tip, and the inner peripheral surface of the opening hole 5 of the disk 1 also has a shape that matches the protruding conical portion, the opening of the disk 1 By simply inserting the hole 5 into the protruding portion 101, a reliable electrical connection can be obtained between the conductive portions formed on the conical surface. This example is also a clamp in a broad sense, but more reliable clamping is possible if the clamp structure as described above is also employed. Further, if the conductive portion 107 portion of the protruding portion 101 has an elastic structure or is structured to be biased outward by a spring material, the conductive portions can be brought into strong and reliable contact after the disc is inserted. Further, after the disc is inserted, the disc opening end can be pressed by some mechanism to obtain a more reliable electrical contact and clamping function.

  FIG. 12 shows a simplified cross-sectional view of a structure that employs a clamp mechanism with a clamp member 120, and FIG. 13 shows a simplified cross-sectional view of a structure that employs a clamp mechanism with a clamper 200. . In this example, the electronic circuit 4 is disposed further outside the clamper 200.

  In the present embodiment, for example, the conductive portion having a thin film structure only needs to be formed on the inner peripheral wall of the disk opening hole and the outer peripheral wall surface of the projecting portion of the turntable, so that the configuration is extremely simplified and advantageous in terms of cost.

  FIG. 14 is a simplified perspective view showing a disk configuration for explaining another embodiment of the disk drive device as an application example of the embodiment of FIG. 11 and a configuration of the turntable 100 and the protruding portion 101 of the disk drive device. FIG. The present embodiment shows an example in which three (plural) electronic circuits 4A to 4C are mounted on the disk 1, and conductive portions 2A to 2C are formed on the inner peripheral wall of the opening hole 5 of the disk 1 at a distance. These conductive portions 2A to 2C are electrically connected to the electronic circuits 4A to 4C via the connection portions 3A to 3C. Conductive portions 107A to 107C that individually contact the conductive portions 2A to 2C when the disk 1 is fitted into the protruding portion 101 are formed on the outer peripheral wall of the protruding portion 101 of the turntable 100. In this case, in order to enable positioning so that the conductive portions 2A to 2C and 107A to 107C are in contact with each other, for example, as described with reference to FIG. A structure in which a slit 6 is provided on the disk side is employed.

  Next, another embodiment of the present invention will be described. In this embodiment, a plurality of conductive portions formed on the disk 1 are used, and one of the electronic circuits and the like electrically connected to the respective conductive portions is a rechargeable battery. This battery is connected to the disk drive device side. The battery is charged by the power supplied from the battery, and the power is supplied from the battery to other electronic circuits.

  In the embodiment shown in FIG. 15, the battery 4D is used instead of the electronic circuit 4A in the embodiment of FIG. 8, and power is supplied from the battery 4D to the other electronic circuits 4B and 4C via the connection lines 3AB and 3AC. . The battery 4D is charged with power supplied from a conductive portion (clamp member 120A) on the disk drive device side. Here, without providing the battery 4D, the power supplied from the conductive portion (clamp member 120A) on the disk drive device side is supplied directly to the other electronic circuits 4B and 4C via the connection lines 3AB and 3AC. It can also be configured.

  In the embodiment shown in FIG. 16, the battery 4D is used instead of the electronic circuit 4A in the embodiment of FIG. 14, and power is supplied from the battery 4D to the other electronic circuits 4B and 4C via the connection lines 3AB and 3AC. Is done. The battery 4D is charged by being supplied with power from the conductive portion on the disk drive device side (the conductive portion 107A of the protruding portion 101). In this case as well, the power supplied from the conductive part 107A on the disk drive device side can be supplied to the other electronic circuits 4B and 4C via the connection lines 3AB and 3AC without providing the battery 4D.

  In such a configuration, power is always supplied to the electronic circuit 4 on the disk 1 even during the disk rotation operation. Since the power supply does not have to be affected by noise, the power supply from the disk drive device side or from the outside does not have any problem even if it contacts the rotating part, and the power supply can be performed relatively easily.

  Note that when the rotation of the turntable is stopped, the conductive portion of the disk and the conductive portion on the disk drive device side may be held in contact. In this case, the battery provided on the disk can be charged when the rotation is stopped. Signal exchange with electronic circuits is also possible.

  In the present invention, it becomes possible to deal with a wider range of applications by simultaneously applying the above-described embodiments. That is, at least two of the conductive portion 2 on the lower and upper surfaces of the disk, the conductive portion 2 on the inner peripheral edge of the upper surface of the disk opening hole 5, and the conductive portion 2 on the inner wall surface of the opening hole 5 are provided. Are electrically connected to each other by receiving the clamping pressure, and corresponding conductive portions 105, 201, 120 on the turntable 100, the clamper 200, the clamp member 120, the outer peripheral wall surface of the protruding portion 101 of the turntable 100, etc. , 107, etc. are provided, and signals are transmitted and received through the electrically connected conductive portions during clamping. In this case, since signals are exchanged only between the conductive portions that are in electrical contact during clamping on the disk side and the disk drive device side, if conductive portions are provided in advance at all positions assumed on the disk drive device side, For example, if the conductive portion provided on the disk side is formed only on the lower surface, only the conductive portion 105 of the turntable 100 is in electrical contact, and signals are exchanged only between the two conductive portions. The conductive portion does not contribute to the signal transmission / reception operation. The same applies to the case where a conductive part is provided on the other part of the disk, and signals are exchanged only with the provided conductive part, ensuring versatility.

  Since the conductive portion 2 formed on the optical disk surface may be a simple conductive film, it can be easily formed by vapor deposition. Further, the conductive film can be attached to the surface, or can be formed by any method other than vapor deposition. For example, as a configuration in which the conductive portion is formed on both surfaces of the optical disc, a conductor such as metal is embedded through the clamp portion on the optical disc surface, slightly protrudes from each surface, and a connection line is connected to each protruding surface. You can also According to such a configuration, durability is high, and it is possible to connect electronic circuits and the like on both sides of the disk via the protruding portion, and the usability is expanded.

  In the embodiment shown in FIGS. 3 to 6, the signal exchange between the disk and the disk drive device side is performed by the conductive parts 2 and 105, but instead of the conductive part, a photoelectric conversion part (photodiode) or wireless Part (antenna) can be used. In this case, the photoelectric conversion unit and the antenna on the disk drive device side do not need to be in direct contact with each other, can be spaced apart from each other, and are conscious of reliable electrical contact between the conductive parts. In other words, it is not necessary to limit the arrangement of these to the clamp position, and the disk and disk in which the photoelectric conversion unit and the antenna as a pair as a disk / drive interface rotate integrally when the disk rotates. What is necessary is just to be formed in the corresponding | compatible part by the side of a drive apparatus. This configuration is also characteristic.

  In the configuration in which an antenna for transmitting and receiving radio signals is provided on each of the disk and the disk drive device side, the antennas can be spaced apart from each other. There is almost no influence or signal leakage to the outside, and reliable communication is possible. In order to avoid direct contact between the two antennas, the surfaces of at least one antenna can be brought into contact with each other if they are covered with a protective film (for example, an insulating film).

  In the disk drive device, the photoelectric conversion unit (photodiode) and the radio unit (antenna) are arranged at, for example, a recess further inside than the mounting unit 104 on which the disk of the turntable is directly mounted. A corresponding photoelectric conversion unit (photodiode) or radio unit (antenna) may be disposed on the disk unit facing the unit. Of course, a radio part including an antenna and an electronic circuit as a signal processing circuit can be provided in the recess. The antenna disposed in the disk drive device is preferably formed in the circumferential direction, and if it is formed in a continuous ring shape or arc shape, it is not necessary to strictly place the antenna on the disk side. If a positioning mechanism (for example, a positioning mechanism as shown in FIG. 10) is used, the photoelectric conversion unit (photodiode) and the radio unit (antenna) do not need to be provided in the circumferential direction. It is disposed opposite to the photoelectric conversion part (photodiode) and radio part (antenna) of the disk.

  FIG. 17 is a simplified cross-sectional view of the main part of a disk drive device in which the present embodiment is applied to the structure shown in FIG.

  Referring to FIG. 17, the disk 1 is placed on the ring-like placement portion 104 of the turntable 100, is clamped by the clamper 200, and is driven to rotate. The inside (center side) of the mounting portion 104 of the turntable 100 is a recess, and an antenna 108 is provided on the surface of the recess, for example. On the other hand, the antenna 6 is provided at a position facing the antenna 108 of the disk 1. Since the antennas 6 and 108 are arranged close to each other and rotate together so as to face each other in a stationary state, there is no problem caused by the rotation as in the prior art. The antenna 108 provided on the turntable 100 is formed in the circumferential direction, and is preferably formed in a ring shape or an arc shape. The surface of the mounting portion 104 is an insulating portion because the connecting portion 3 of the disk 1 comes into contact therewith. In the present embodiment, any mechanism as described above other than the clamper 200 can be used as the clamp mechanism. Here, the antennas 6 and 108 can include an electronic circuit as a radio unit or a signal processing circuit. In this case, the connection part 3 becomes unnecessary and a structure is simplified.

  FIG. 18 is a simplified cross-sectional view of the main part of a disk drive apparatus in which the present embodiment is applied to the structure shown in FIG.

  Referring to FIG. 18, the disk 1 is placed on the ring-like placement portion 104 of the turntable 100, is clamped by the clamper 200, and is driven to rotate. A recess 220 is provided on the inner peripheral side of the clamper 200, and the antenna 108 is provided in the recess 220, for example. On the other hand, the antenna 6 is provided at a position facing the antenna 108 of the disk 1. Since the antennas 6 and 108 are disposed close to each other and rotate together so as to face each other in a stationary state, there is no problem caused by the rotation. The antenna 108 provided in the concave portion of the clamper 200 is formed in the circumferential direction, and is preferably formed in a ring shape or an arc shape. The surface of the clamper 200 in contact with the connection portion 3 of the disk 1 is an insulating portion. Here, the antennas 6 and 108 can include an electronic circuit as a radio unit or a signal processing circuit. In this case, the connection part 3 becomes unnecessary and a structure is simplified.

  In the above-described embodiment, the same applies to the case where a photoelectric conversion unit is used instead of the antenna.

  The configuration of the preferred embodiment of the disk drive device and disk according to the present invention has been described in detail above. However, it should be noted that such examples are merely illustrative of the invention and do not limit the invention in any way. Those skilled in the art will readily understand that various modifications and changes can be made according to a specific application without departing from the gist of the present invention. That is, the present invention is not limited to the disk drive device and the disk described in the above embodiment, but the rotating material and the rotation in the rotating mechanism that rotates the rotating material in contact with the holding (gripping) member. The same applies to the mechanism.

  The contact gripping means of the above-described embodiment includes a clamp mechanism, and includes, for example, the turntable 100, the clamper 200, the clamp member 120, and the protrusion 101 and the inner periphery of the disk opening hole 5 as described above. It is.

  In addition, the shape of the conductive portion on the disk and the disk drive device side is arbitrary, but in order to obtain a more reliable electrical connection, a shape that fits the conductive portion during clamping (one is concave and the other is (Convex shape). At this time, it is more preferable if the material is an elastic material.

  The information acquired from the electronic circuit of the optical disk by the disk drive device is processed by a processing device such as an external computer, and the signal processed by the processing device or the signal processed by the electronic circuit is processed in the RAM area or electronic circuit of the optical disk. It can also be configured to write in a circuit or in a separate memory, and the processing is arbitrary.

  In the above-described embodiment, the electronic circuit can be embedded in the disk, and by doing so, it is possible to avoid external dirt (such as hand and oil) and scratches. In addition, by covering the electronic circuit formed on the disk surface with some insulating material, the electronic circuit part, the memory, and the like are prevented from being contaminated, shocked, and water.

  When a plurality of electronic circuits are mounted on a disk, the balance of the entire disk can be maintained by installing each electronic circuit at a symmetrical position from the center of the disk. In this case, the conductive portions are separated from each other in the radial direction on the disk and the disk drive device side to avoid electrical contact with each other. Similarly, when mounting a pair of electronic circuits, the pair of electronic circuits can be formed symmetrically with respect to the center of the disk opening.

  As is apparent from the above description, the present invention can be used even with a normal disk not equipped with an electronic circuit.

Claims (5)

A disk having a plurality of first conductive parts electrically connected to the mounted electronic function part and spaced apart in the circumferential direction is placed on the turntable, and the disk is contacted and gripped to rotate. Configured to access the disk by
A disk drive device comprising: a plurality of second conductive portions that are in electrical contact with the plurality of first conductive portions, respectively, on the contact gripping portion of the disk.   An electronic function unit is mounted on a turntable of the disk drive device, a disk having a plurality of first conductive parts electrically connected to the electronic function unit is placed, and the disk is gripped and rotated. A plurality of second conductive portions that are in electrical contact with the first conductive portion, respectively, in at least a part of the contact gripping portion of the disk during rotation driving, and the first conductive portion and the second conductive portion are provided. A disk driving method characterized in that signals are exchanged between conductive parts.   2. The disk drive device according to claim 1, further comprising positioning means for specifying a contact positional relationship between the plurality of first conductive parts and the second conductive parts.   In the positioning means, a projecting portion that projects in a radial direction is provided at a projecting portion that fits in a central opening hole of the disc, and a slit that fits the projecting portion is provided in the disc. 2. The disk drive device according to claim 1, wherein   A first conductive portion is formed on the inner peripheral wall of the central opening hole of the disc, and the second conductive portion is formed on the outer peripheral surface of the protruding portion that contacts the inner peripheral wall and fits in the central opening hole of the disc. The disk drive device according to claim 1, wherein the disk drive device is formed.

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