JPWO2006075608A1 - Disk drive device, disk signal processing system 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. An electronic circuit 10 is mounted on the disk 100, and a conductive portion 20 </ b> A electrically connected to the electronic circuit 10 is formed at the inner peripheral end of the central opening hole 40. With the central opening hole 40 inserted into the projecting portion 240, the clamp pin 280 and the conductive portion 20A formed at the inner peripheral end of the central opening hole 40 of the disk are in electrical contact.

Description

  The present invention relates to a disk drive device, a disk signal processing system, and a disk, and more particularly to a disk drive device, a disk signal processing system, and a disk that reliably transmit and receive signals between the disk and the drive device with a simple configuration.

  Optical discs are the most promising storage media in the future because they have a very large amount of data that can be stored despite being made up of extremely inexpensive materials such as polycarbonate and other resins, and are extremely advantageous in terms of cost performance. It is.

  A disk drive device is used to read information stored 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)

  Recently, there has been proposed an optical disc in which not only a storage 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 5).

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

  In addition, it is possible to construct a light emitting / receiving circuit on each of the optical disk side and the disk drive side and transmit / receive optical signals via the light emitting / receiving circuit, but 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)

  As described above, conventionally, transmission / reception of signals between an electronic circuit mounted on the disk surface and an internal circuit of the disk drive device is performed by transmitting and receiving radio signals via antennas formed on the disk surface and the disk drive side, respectively. Send and receive. 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.

  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 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.

  SUMMARY OF THE INVENTION An object of the present invention is to provide a disk drive device, a disk signal processing system, and a disk that enable reliable transmission and reception of signals between the disk side and the disk drive device side with a low cost and simple configuration.

  Another object of the present invention is to provide a disk drive device, a disk signal processing system, and a disk drive device having a low cost and a simple configuration that can reliably transmit and receive electrical signals between a disk and an external device, thereby greatly improving the expandability of the disk utilization field. To provide a disc.

  Still another object of the present invention is to provide a disk drive device, a disk signal processing system, 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. is there.

  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 signal processing system, and the disk according to the present invention employ the following characteristic configuration.

(1) At least one clamp pin that presses the disk toward the turntable is provided in the circumferential direction of the protrusion into which the center opening hole of the disk is inserted, and the center opening hole of the disk is inserted and fixed in the protrusion. In the disk drive device that rotationally drives the disk,
An electronic circuit is mounted on the disk, a conductive portion electrically connected to the electronic circuit is formed at an inner peripheral end of the central opening hole, and a central opening hole of the disk is inserted into the protruding portion. In this state, the clamp pin and the conductive portion formed at the inner peripheral end of the central opening hole of the disc are configured to be in electrical contact with each other, and the clamp pin and the electric portion are electrically connected to the central portion of the protruding portion. Is connected to the first photoelectric conversion means, and is opposed to the first photoelectric conversion means, and the second photoelectric conversion means is provided at the stationary portion of the disk drive device. Disk drive device.
(2) A disk signal processing system for exchanging signals between an electronic circuit mounted on a disk and a disk drive device that rotationally drives the disk,
At least one clamp pin that presses the disk toward the turntable is provided in the circumferential direction of the protrusion into which the center opening hole of the disk is inserted, and the center opening hole of the disk is inserted into and fixed to the protrusion. In the disk drive device that rotationally drives
An electronic circuit is mounted on the disk, a conductive portion electrically connected to the electronic circuit is formed at an inner peripheral end of the central opening hole, and a central opening hole of the disk is inserted into the protruding portion. In this state, the clamp pin and the conductive portion formed at the inner peripheral end of the central opening hole of the disc are configured to be in electrical contact with each other, and the clamp pin and the electric portion are electrically connected to the central portion of the protruding portion. Is connected to the first photoelectric conversion means, and is opposed to the first photoelectric conversion means. The stationary portion of the disk drive device is provided with second photoelectric conversion means, A disk signal processing system for transmitting and receiving signals via first and second photoelectric conversion means.
(3) Three clamps for inserting a disk central opening hole into the protrusion on the disk drive side and pressing the disk toward the turntable in the circumferential direction of the protrusion where the central opening hole of the circumferential disk is inserted In the disk drive device provided with a member and rotationally driving the disk by inserting and fixing a central opening hole of the disk in the protruding portion,
An electronic circuit is mounted on the disk, and three conductive parts electrically connected to the electronic circuit are formed at the inner peripheral end of the central opening hole, and the central opening hole of the disk is formed in the protruding part. The clamp member is configured to be in electrical contact with each of the conductive portions formed at the inner peripheral end portion of the central opening hole of the disc, and the central portion of the projecting portion. The first photoelectric conversion means electrically connected to the clamp member is provided at a position opposed to the first photoelectric conversion means, and the second photoelectric conversion is provided at the stationary portion of the disk drive device. A disk drive device provided with means.

  According to the present invention, reliable signal transmission / reception between the disk and the disk drive device is enabled, thereby enabling reliable transmission / reception of electrical signals between the disk and the external device, that is, information stored in the disk. The signal between one or a plurality of electronic circuits (having a configuration necessary for circuit operation such as a signal processing circuit and a memory, a battery, etc.) mounted on the disk and an external device Transmission and reception can be made with a simple configuration. In addition, power can be reliably supplied to the battery mounted on the disk. 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. As a result, a disk whose application range is remarkably expanded can be minimized 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. It can be obtained with the limit. 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 storage 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, in the present invention, even when the disk is rotating, the conductive part connected to the disk-mounted electronic circuit and the disk holding / gripping part (electrical contact part) of the disk drive are in direct contact with each other for electrical Because of the connection relationship, radio interference due to the metal film formed on the disk surface and surrounding metal members is not a problem, and there is no risk of wiretapping caused by radio leakage due to external radio waves, etc. There is no problem of interference from the radio waves, 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 pin.

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. It is a top view which shows typically the structure of the optical disk in the other 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. It is a top view which shows typically the structure of the optical disk in the Example of this invention. It is sectional drawing which shows typically the structure of the optical disk in the Example of this invention. It is sectional drawing which shows typically the structure of the optical disk in the Example of this invention. 1 is a schematic cross-sectional view of a main part schematically illustrating an optical disc drive apparatus configuration according to an embodiment of the present invention. 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. 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. It is a top view which shows typically the structure of the optical disk in the further another 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. It is a top view which shows typically the structure of the optical disk in the other 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. FIG. 10 is a schematic cross-sectional view of a main part schematically illustrating a vicinity of a turntable and a clamper for explaining a configuration of still another embodiment of the optical disk drive device according to the present invention. 1 is a schematic cross-sectional view of a main part of an embodiment of a disk drive device according to the present invention. It is a top view which shows typically the structure of the optical disk in the Example of this invention. FIG. 5 is a schematic cross-sectional view of a main part schematically illustrating another embodiment of the disk drive device according to the present invention. It is a schematic sectional drawing of the principal part by which the further another Example of the disk drive apparatus by this invention was modeled. It is a top view which shows typically the structure of the optical disk in the Example of this invention.

Explanation of symbols

100 Optical disc 100A MO or FD
2, 3 Wiring 10, 11, 12 Electronic circuit 20, 20A, 21, 22, 211 Conductive part 30, 31, 32 Electrical connection part 33 Conductive terminal 40 Central opening hole 50, 51, 53 Insulating film 60 Spindle motor 70 Rotation Body / stationary body signal transmission / reception interface 80 Internal electric circuit 90 External processing circuit 101A Magnetic material 101B Concave part 101C Convex part 150, 290 Antenna 200 Disk drive device 210 Turntable 240 Protrusion part 220 Rotation drive part 221 Magnetic pole 212 Concave part 214 Convex part 230 Rotation Axis 250 Permanent magnet 260 Clamper 270 Magnetic part 280 Clamp pin 280A Spring 330, 410 Electrical or optical connection part 300 Substrate 311 Magnetic pole 320 Bearing part 400 Housing bottom face

  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 be apparent in the description of the following examples.

  Hereinafter, a specific configuration example of the present embodiment will be described with reference to the drawings. In the following, an example in which an optical disk is used as a disk will be described. However, any other disk (for example, CD, DVD, MO, FD) as long as the disk is clamped by a holding and holding means of a disk drive device and is driven to rotate. , HD, etc.). Further, in a broader concept, not only the disk and the disk drive device, but also the rotary body and the rotary drive section in the rotary drive section that rotates the rotary body in contact with the holding (gripping) member and held (gripped). Although applicable, an optical disc and an optical disc drive apparatus will be described below.

  1 to 4 are plan views schematically showing the configuration of an optical disc 1 in an embodiment of the present invention. FIGS. 5 to 8 are cross-sectional views schematically illustrating main components of the disk drive device according to the embodiment of the present invention.

  In FIG. 1, a RAM area (information storage unit) in which data such as images, music, and images are stored on the outer peripheral portion of the surface of the optical disc 100, or a ROM as a program storage unit in which a predetermined program is stored. An information storage area such as an area is formed (not essential to the present invention), and for example, an electronic circuit 10 that executes signal processing based on a program stored in a ROM area or other memory is an arbitrary part. Is formed. The electronic circuit 10 can include arbitrary components necessary for electronic processing such as a memory, and may execute an operation unique to the circuit, not an operation based on a program. 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 that is held in contact with the holding, gripping, and clamping (chucking) mechanism of the disc drive device 200. In addition, a conductive portion 20 is formed in IN, an electronic circuit 10 is provided outside the inner peripheral portion OUT, and the electronic circuit 10 and the conductive portion 20 are electrically connected via a connection portion 30. Here, the portion that is held in contact by the holding, gripping, and clamping (chucking) mechanism of the optical disk by the disk drive device includes all the portions that are held in contact by the disk drive device, and will be described below. It is clear from the gist of the present invention that the present invention is not limited to the examples.

  The electronic circuit 10 can be provided at an arbitrary position. However, since the optical disk is held with a relatively high adhesion force by the clamp (chucking) mechanism of the disk drive device 200, the clamp described above is meant to avoid the influence of the pressure. A portion that is not the portion to be removed and is out of the inner periphery is preferred. However, in the case of a configuration in which there is no problem of the clamping pressure (for example, when an electronic circuit or the like is embedded in the disk or a structure with a low clamping pressure), it may be formed in the inner peripheral portion IN. Of course, the conductive part 20 itself may be set in the same part as the electronic circuit 10, for example, so that the electronic circuit 10 includes the conductive part 20. In short, the connection unit 30 only needs to exist functionally, and does not require physical existence.

  For example, as shown in FIG. 2, the conductive portion 20 is provided in the clamp portion (holding portion, gripping portion: hatched portion) CLAMP of the inner peripheral portion IN of the optical disc 100, and the clamper ( The electronic circuit 10 can also be formed in a portion where the holding and gripping) are not in direct contact with each other and are not subjected to clamping pressure.

  Further, as shown in FIG. 3, the conductive portion 20 is clamped between the clamp portion (holding and gripping portion: hatched portion) CLAMP further inside the inner peripheral portion IN of the optical disc 100 and the clamp between the outer peripheral portion OUT and the inner peripheral portion IN. The electronic circuit 10 can also be formed in parts other than the part.

  Further, as shown in FIG. 4, the clamp portion (holding and gripping portion: hatched portion) CLAMP of the inner peripheral portion IN of the optical disc 100 is provided with the conductive portion 20 and the normal outer storage portion of the outer peripheral portion OUT. The electronic circuit 10 can also be formed in a portion that is not taken. The electronic circuit 10 and the conductive part 20 are connected by an electrical connection part 30. Of course, the electronic circuit 10 may be formed in the storage area.

  The electronic circuit 10 is a circuit that executes an operation process based on a program stored in a ROM area on the optical disk surface, for example, and the processing result is transmitted to the disk drive device 200 in the form described below. Conversely, a signal from the disk drive device 200 is received. As described above, the electronic circuit 10 may be configured to perform an operation based on a program stored in another storage 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.

  For example, when the information stored in the storage unit is encrypted, the predetermined processing of the electronic circuit 10 is based on a program stored in the ROM area by reading the encrypted information. There is a process to decipher. Similarly, when writing with encryption, it is also possible to perform encryption based on the encryption program stored in the storage unit.

  Here, if an encryption program and a decryption program are defined for each optical disc, closed signal processing can be performed for each optical disc, and access to the disc can be performed unless the processing is based on the closed unique processing. It is difficult to ensure high security. Furthermore, if a key for decryption is individually set from the outside, higher security can be secured. Further, the processing according to the program stored in the ROM area can be executed by the electronic circuit, or the processing result processed by the external processing circuit can be stored in the storage unit. By doing so, the processing result is stored and stored only in the RAM area as the storage unit of the optical disk without remaining in the external processing device, and the data to be stored and stored 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 and the like formed on the optical disc and an external circuit significantly expands 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.

  For example, a thin-film conductive portion 20 is formed on the inner peripheral portion of the optical disc 100. The conductive portion 20 may be electrically connected to the electronic circuit 10 via a connection portion 30 (also formed as a thin film on the surface of the optical disc 100), or may be a portion having information independently. it can. For example, if this conductive part 20 has some information on the optical disk (such as disk-specific information), the information can be acquired directly from the disk drive device. Instead of an electronic circuit, it can be an electronic functional unit having a function of generating, writing or storing some electronic information, and the conductive unit itself includes an electronic functional unit or an electronic circuit that generates some information. May be. Conversely, the electronic function unit or the electronic circuit may include a conductive unit. There may be no electronic functional part or electronic circuit. The conductive portion may be formed on the same surface as the storage area forming surface of the disk or may be formed on the opposite surface.

  The optical disk 100 is placed on the turntable 210 of the disk drive device 200, clamped by the clamper 260, and rotationally driven by the spindle motor 60. Usually, the storage surface on which information of the optical disc is stored is formed on the outer peripheral portion OUT except for the inner peripheral portion of the optical disc 100, and the inner peripheral portion IN is basically a transparent portion, a translucent portion, or an opaque portion. It is used only as a part for clamping. In the present embodiment, the conductive portion 20 is formed in the inner peripheral portion IN.

  Referring to FIG. 5, the embodiment of the disk drive device 200 according to the present invention will be described. The turntable 210 is fixed to the rotating shaft 230 of the spindle motor 60 and is opened at the center of the optical disk 100 at the center. A protrusion 240 into which the opening hole 40 is fitted is provided. In the optical disc 100, the center opening hole 40 is fitted into the protrusion 240 of the turntable 210, and the center position of the optical disc 100 is determined and placed on the turntable 210. A permanent magnet 250 is usually installed on the top of the protrusion 240. A conductive portion 211 is formed on the surface of the turntable 210 at a position facing the conductive portion 20 of the optical disc 100. FIG. 5 is simplified for easy understanding. For example, the thickness of the conductive portions 20 and 211 is larger than that of other components including the optical disc 100. And 211 are thin films, and in practice, it is not necessary to be aware of the thickness. Further, at least one of the conductive portions 20 and 211 may be formed in the entire circumferential direction, or only a part thereof may be formed.

  On the other hand, a clamper 260 is disposed above the optical disc 100. The clamper 260 has a magnetic portion (not shown) that is attracted by receiving a magnetic force from the permanent magnet 250 at a portion facing the permanent magnet 250 provided at the top of the projecting portion 240 of the turntable 210. After the optical disk 100 is placed on the turntable 210, when the clamper 260 is brought closer, the clamper 260 is brought into close contact with the turntable 210 with the optical disk 100 sandwiched by the magnetic force between the permanent magnet 250 and the magnetic material. In this way, the optical disc 100 is held and clamped (chucked) with the concentricity maintained, and is rotated with the rotation of the rotating shaft 230 of the spindle motor 60. Here, in the present embodiment, an example is shown in which the clamper 260 rotates integrally with the turntable 210. However, a gap is provided in the clamper 260, and the permanent magnet 250 is magnetically adhered in this gap to be freely integrated. It is also possible to provide a magnetic member that rotates. Clamping means all means for contacting and holding a disk as a rotating body.

  In the drawing, the spindle motor 60 is an independent motor, but this is because it is schematically illustrated. Usually, the magnetic action of a magnet provided on the turntable 210 and a coil provided in the vicinity of the magnet is provided. A thin flat motor configuration such as a rotation mechanism including a stator and a rotor that rotates the turntable 210 around the rotation shaft 230 is often used. In this case, the signal transmission path is further simplified. A specific example of such a configuration will be described later.

  At this time, the conductive portion 20 of the optical disc 100 and the conductive portion 211 of the turntable 210 on the disk drive device 200 side are in close contact with each other by magnetic force, and a reliable electrical connection is maintained. Accordingly, the conductive portion 20 on the optical disc 100 side and the turntable 210 (conductive portion 211) on the disc drive device 200 side independent of the optical disc 100 are electrically connected. Of course, the connection to the conductive portion 20 of the optical disk 100 on the disk drive device 200 side is not limited to the turntable 210 but may be any part that rotates integrally with the optical disk 100 and makes electrical contact. For example, FIG. As shown in FIG. 5, the conductive portion 20 is provided on the surface opposite to the position shown in FIG. 5, and a conductive portion (corresponding to 211) is formed at a portion of the clamper 260 corresponding to the position facing the conductive portion 20 of the optical disc 100. it can.

  With the above-described configuration, the electronic circuit 10 or the electronic function unit on the optical disc 100 and the internal electric circuit on the disc drive apparatus 200 side are electrically connected via the two conductive units 20 and 211. Become so.

  The disk drive device 200 places the optical disk 100 on the turntable 210, clamps it with a clamper 260, and rotates it to read information stored on the optical disk. Conversely, information can be written. Here, in the disk drive device, as described above, since the conductive portion 211 is provided in a portion corresponding to the conductive portion 20 (contact portion) of the optical disc 100, a signal is transmitted between the conductive portions 20-211. Transmission / reception is performed. At this time, since the optical disk 100 and the turntable 210 and the clamper 260 on the disk drive device 200 side are integrally rotated, signal transmission between the two conductive parts is performed directly and reliably.

  The conductive portion 211 on the disk drive device 200 side is connected to an internal electric circuit (signal processing circuit) 80. The connection between the conductive portion 211 and the internal electric circuit 80 can be any connection form. For example, in the structure shown in FIG. 5, the rotation shaft 230 of the spindle motor 60 that rotates the turntable 210 together with the optical disk 100, and a rotation body such as the rotation shaft 230 and a stationary body such as the main body of the disk drive device 200. Is connected to the internal electric circuit 80 via a rotating / stationary body signal transmitting / receiving interface 70 for transmitting / receiving signals.

  As the rotating body / stationary body signal transmission / reception interface 70 for signal transmission / reception between the rotating body such as the rotating shaft 230 and the internal electric circuit 80 of the stationary body on the disk drive device 200 side, various known or publicly known means are used. be able to. For example, a signal transmission / reception system using a slip ring can be employed.

  In this embodiment, a well-known configuration is adopted as an electrical connection configuration of the route of the conductor 20 on the optical disc 100 side, the conductor 211 on the disc drive device 200 side, the rotating shaft 230, and the rotating body / stationary body signal transmission / reception interface 70. You can easily understand what you can do. For example, the conductive part 211 is provided on the insulating part of the turntable 210, and the route from the conductive part 211 to the rotating body / stationary body signal transmission / reception interface 70 may form a dedicated wiring form, or any other connection form. (The same applies to the description of Examples below).

  Further, as the rotating body / stationary body signal transmission / reception interface 70, signal transmission / reception between the conductive portion 211 on the rotating body (turntable 210) side of the disk drive device 200 and the internal electric circuit 80 is performed wirelessly or optically. By providing the means, signal transmission and reception can be enabled. In this case, although the cost slightly increases on the disk drive device 200 side, it is not necessary to provide signal transmission / reception means for each optical disk, and the merit of low cost of the optical disk can be sufficiently maintained. In FIG. 6, signals are transmitted and received at the connection portions 71 and 72 which are the electrical or optical means as the rotating body / stationary body signal transmission / reception interface 70. Further, the connecting portions 71 and 72 may be connected electrically like a slip ring, which is effective in the case of power supply.

  When signals are transmitted / received by optical means, an optical path is provided along the axis of the spindle motor 60, signal light is emitted (received) from the shaft end, and signal light is received (emitted) facing the shaft end. If the photoelectric conversion means is provided, there will be less signal light blur due to the rotation of the rotation shaft of the spindle motor. The same applies to signal transmission / reception by wireless means. The structure shown in FIG. 6 is also the same, and a slip ring unit, a photoelectric conversion unit, a radio unit, and the like are provided as the rotating body / stationary body signal transmission / reception interface 70 electrically connected to the conductive portion 211. The conductive portion 211 is connected to the rotating body / stationary body signal transmission / reception interface 70 provided on the center upper surface of the clamper 260 by the wiring 2 disposed on the clamper 260. The internal electric circuit 80 on the disk drive device side connected by the rotating body / stationary body signal transmission / reception interface 70 sends a signal to the optical disk side, processes a signal received from the optical disk side, or processes the signal without processing. Sent to a device (for example, a personal computer).

  Here, at the time of clamping, the conductive portion 211 on the side of the disk drive device 200 that is in electrical contact with the conductive portion 20 of the optical disc 100 can be formed on both surfaces of the turntable 210 and the clamper 260 that sandwich the optical disc 100. By doing so, it is possible to cope with the case where the conductive part is formed on different surfaces depending on the optical disk 100 or the case where the conductive part is formed on both surfaces of the optical disk 100. The same applies to the description of the following embodiments.

  Since the conductive portion 20 formed on the surface of the optical disk may be a simple conductive film, it can be easily formed by vapor deposition. 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 portions are formed on both surfaces of the optical disc, a conductor such as a metal may be embedded through the clamp portion on the optical disc surface and slightly protruded from each surface.

  As described above, the electronic circuit 10 connected to the conductor 20 of the optical disc 100 may be formed anywhere on the optical disc. However, considering the balance of the optical disc, a position as close to the center of the optical disc as possible is preferable. It can also be an electronic circuit. The electronic circuit 10 may be a thin semiconductor IC chip or may be formed inside the disk during the disk manufacturing process.

  The inner peripheral part of the optical disc 100 where the conductive part 20 is formed is normally used as a part only for clamping. If the conductive part (electrode) 20 formed on the inner peripheral part uses a transparent electrode, the function of the transparent part can be maintained.

  FIG. 7 is a schematic cross-sectional view of a main part schematically illustrating the configuration of another embodiment of the optical disk drive device according to the present invention.

  In the disk drive device 200 shown in FIG. 5, the spindle motor 60 that rotates the turntable 210 is displayed as an independent motor, and the turntable 210 is rotated by rotating its rotating shaft 230. In short, the means for rotating the turntable 210 are generically named and can be configured to include a stator and a rotor. For example, a flat type rotational drive mechanism that is currently widely used for disk rotation is used. Can do. An embodiment based on such an example is shown in FIG.

  In the rotary drive mechanism as a spindle motor in FIG. 7, a plurality of magnetic poles 221 are arranged along the circumferential direction on the outer periphery of the lower surface of a disk-like rotary drive unit 220 that rotates integrally with a turntable 210 and a rotary shaft 230. On the other hand, a magnetic pole 311 is provided on the surface of the substrate 300 fixed to the bottom surface 400 side of the substrate 300 so as to face the magnetic pole 221, and the magnetic pole of the magnetic pole 311 is changed and controlled by a control circuit formed on the substrate 300. Then, based on the polarity relationship between the magnetic pole 221 and the magnetic pole 311, the rotation drive unit 220 and the turntable 210 are rotated in the circumferential direction.

  7, similarly to FIG. 5, a protrusion 240 into which the central opening hole 40 of the optical disc 100 is fitted is formed at the center of the turntable 210, and the central opening hole 40 of the optical disc 100 is fitted into the protrusion 240. It is placed on the turntable 210. A permanent magnet 250 is provided on the top of the protrusion 240. A conductive portion 211 facing the conductive portion 20 of the optical disc 100 is formed at a predetermined surface portion of the turntable 210. A clamper 260 having a magnetic part 270 is disposed above the optical disk 100. After the optical disk 100 is placed on the turntable 210, the clamper 260 sandwiches the optical disk 100 by the magnetic force of the permanent magnet 250 when the clamper 260 is brought closer. Is in close contact with the turntable 210. Thus, the optical disc 100 is clamped (chucked) while maintaining the concentricity, and is driven to rotate along with the rotation of the rotating shaft 230 of the spindle motor, and the conductive portion 20 of the optical disc 100 and the conduction of the turntable 210 on the disc drive device 200 side. The part 211 is in close contact with the magnetic force and is electrically connected.

  The electrical connection configuration from the conductive portion 211 on the disk drive device 200 side to the internal electrical circuit (signal processing circuit) 80 shown in FIG. 5 can be any configuration as described above. In this embodiment, an electrical or optical device is provided at the lower end of the rotation center portion (rotation center axis) of the rotation shaft (extension portion) 230 that is provided below the rotation driving portion 220 below the turntable 210 and penetrates the substrate 300. On the other hand, a similar electrical or optical connection portion 410 (of course, an electrical device such as a slip ring) is provided at a position opposite to the electrical or optical connection portion 330 on the bottom surface 400 of the housing below the substrate 300. Connection is also possible). The extending portion is freely rotatable via a bearing portion 320 in the substrate 300.

  An electrical connection configuration can be obtained if the connection portions 330 and 410 are brought into electrical contact, an optical connection configuration can be obtained if they are optically coupled, and electromagnetic (radio wave) according to radio waves. A configuration is obtained. The electrical connection configuration includes a connection based on direct contact and a connection based on signal transmission / reception using radio waves. When wireless signal transmission / reception is performed, a wireless circuit or an antenna may be provided in each of the electrical or optical connection unit 330 and the connection unit 410. When an optical connection configuration is obtained, an electrical or optical connection is obtained. An optical / electric conversion unit such as a photodiode may be provided in each of the connection unit 330 and the electrical or optical connection unit 410, and an efficient signal can be obtained by installing them oppositely as in this embodiment. Transmission and reception are possible.

  The electrical wiring from the conductive portion 211 on the turntable 210 on the disk drive device 200 side to the connection portion 330 is performed by the insulated dedicated wiring 2 indicated by the thick solid line provided in the rotating shaft 230 or on the outer peripheral surface side thereof. The connection unit 410 can be connected to the internal electric circuit 80 by normal electric wiring.

  In the embodiment shown in FIG. 7, the conductive part 211 connected to the conductive part 20 of the optical disk 100 on the disk drive device 200 side is provided on the turntable 210 side. However, as described with reference to FIG. It can also be provided on the clamper 260 side. In this case, a conductive portion electrically connected to the electronic circuit 10 is provided on the upper surface of the optical disc 100, and a conductive portion is provided at a corresponding portion of the clamper 260 that is in contact with and opposed to the conductive portion, or the permanent magnet 250. Corresponding conductive portions can be provided at appropriate portions of the magnetic portion 270 and the magnetic portion 270 in close contact with the permanent magnet 250. The conductive part on the clamper 260 side is provided with the electrical or optical connection part as described above provided on the upper surface (not shown) of the casing.

  FIG. 8 is a schematic cross-sectional view of a main part schematically illustrating the configuration of still another embodiment of the optical disk drive apparatus according to the present invention.

  In this embodiment, a clamp pin 280 for holding (holding) the disk 100 is used as the clamper 260 in the disk drive device 200 shown in FIGS. A plurality of (for example, three) clamp pins 280 are provided in the circumferential direction of the protrusion 240 of the turntable 210. The clamp pin 280 is provided in the circumferential direction of the side surface of the projecting portion 240, and is biased in the outer diameter direction by the spring 280A. The optical disk is pushed and fixed from above against this spring force. That is, the center opening hole 40 of the disk 100 is pushed into the protruding part 240 from above against the clamp pin 280 to fix the disk 100 to the turntable 210. Since the disk drive device 200 having such a configuration does not require the clamper 260 as compared with FIGS. 5 to 7, the configuration is simplified and the thickness is reduced. It is often applied to small electronic devices such as notebook computers. The other configuration in FIG. 8 is the same as the configuration in FIGS.

  In the structure as shown in FIG. 8, the clamp pin 280 is used as the conductive portion 211. In this case, as shown in FIGS. 9 to 11, the conductive portion 20 </ b> A is formed on the inner peripheral edge or inner peripheral side wall of the central opening hole 40 of the optical disc 100. The conductive portion 20A may be formed on one of the end edge portion and the inner peripheral side wall portion of the central opening hole 40, or may be formed on both. In FIG. 10, the conductive portion 20A is formed on one surface of the inner peripheral end portion of the central opening hole 40 of the disc, and in FIG. 11, the conductive portion 20A is formed on the inner peripheral end edges of both surfaces of the central opening hole 40 of the optical disc 100. is doing.

  In such a structure, as shown in FIG. 12, since the clamp pin 280 on the disk drive device 200 side is in strong contact with the conductive portion 20A of the optical disk 100, the electrical connection between the two is ensured. The clamp pin 280 is connected to the connecting portion 290 via the wiring 2 provided in the protrusion 240 or along the outer peripheral surface, and between the connecting portion 340 provided on the housing upper surface 40A side of the disk drive device 200. The signal exchange is performed in the above-described form (electrical, optical, etc.).

  Further, as shown in FIG. 13, a conductive portion 20 </ b> A that is electrically connected to the electronic circuit 10 is provided on the inner peripheral wall surface of the central opening hole 40 of the optical disc 100, and the outer peripheral surface portion of the protruding portion 240 of the disc drive device 200. In addition, by providing the conductive portion 211A and fitting the central opening hole 40 of the optical disc 100 into the protruding portion 240, both the conductive portions 20A and 211A can be brought into electrical contact. Also in this case, 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. In this example, since the clamp pin 280 is not used as a conductive part, it is desirable to insulate the surface. However, since the clamp pin 280 can be used as a conductive part, it can be used as a conductive part. The route can be used as a backup).

  Also in this configuration, similarly to FIG. 12, the conductive portion 20A connected to the electronic circuit is connected to the conductive portion 211A and connected to the connecting portion 290 via the wiring 2.

  As described with reference to FIG. 7, signal transmission from the conductive portion on the disk drive device side to the outside is performed by inserting a thin wire (electric wire: wiring) from the conductive portion into the axis of a rotating shaft such as a spindle motor. Connect to a connecting part such as a photoelectric conversion part installed at the tip of the shaft. If a corresponding connecting portion such as a photoelectric conversion portion is provided at a separation position facing the shaft tip portion, reliable signal transmission / reception is possible. For embedding the thin wire in the shaft, an axial cavity may be provided in the shaft, and the thin wire may be disposed there, or a groove is formed in the axial direction along the side surface of the shaft, and the thin wire is added thereto. The thin wire may be fixed by some kind of locking means. Such a configuration is very effective in forming an electrical path between the disk and the disk drive device side. In addition to the signal from the conductive part at the clamp position, the structure between the disk and the disk drive device other than the clamp part is also effective. Thus, a signal obtained by electrical contact by rotating integrally with the disk rotation can be used as a signal transmission path.

  In the disk and the disk drive apparatus having the structure shown in FIGS. 8 to 13, a clamp pin that is strongly pressed by a spring (spring material) 280 </ b> A is applied to the conductive portion formed on the inner end side of the disk opening hole. Since the conductive parts are in electrical contact with each other, and a plurality of clamp pins (generally locking members) are provided in the circumferential direction and are in very strong contact with each other, the contact and electrical connection are stable. The nature is high. In this mechanism, there are usually three or more clamp pins (at least one) in the circumferential direction, so that the conductive part is formed in an annular shape in the form of a belt on the innermost periphery (along the opening hole) of the disk. . The middle may be separated, and an electronic circuit may be provided at a position where the separated portion does not contact the clamp pin.

  It is desirable to select the structure and shape of the clamp pin for obtaining more reliable electrical contact. The structure and material can be selected such that the contact portion of the clamp pin has an elastic characteristic, or after the disk is pushed in, it is in close contact with the conductive portion provided at the inner peripheral end of the opening hole of the disk. In such a structure, since the clamp pin is used repeatedly, a material and a shape that can withstand repeated pressing and the like are desirable.

  Further, as shown in FIG. 13, in such a structure, the protruding portion 240 has a substantially conical shape that becomes narrower toward the tip, and the inner peripheral surface of the opening hole of the disk 100 also matches the protruding conical portion. With such a shape, a reliable electrical connection can be obtained between the conductive portions formed on the conical surface simply by inserting the opening hole of the disk 100 into the protruding portion 240. This example is also a clamp in a broad sense, but a clamp structure as described above can also be adopted.

  FIG. 14 shows still another embodiment of the present invention, and shows an example of a disk drive device used for an MO disk, an FD disk or the like. In this embodiment, a concave portion 212 is provided at the center of the turntable 210, and the convex portion 101C of the MO disk or FD disc 100A is fitted into the concave portion 212, and further, a convex portion provided at the center position on the turntable 210 side. By positioning 214 in the central recess 101B of the MO disk or FD disk 100A, both are positioned.

  A permanent magnet 213A is provided in the concave portion 212 of the turntable 210, while a magnetic material 101A is provided in the convex portion 101C of the MO disk or the FD disk 100A, and both are closely fixed by magnetic force. In this way, the MO disk and the FD disk 100A fixed on the turntable 210 are rotated. Here, the conductive portion 211 is provided on the upper layer of the permanent magnet 250 of the concave portion 212 of the turntable 210, and the conductive portion 20 is provided on the upper portion of the magnetic material 101A of the convex portion 101C of the MO disk or FD disk 100A. In the state, the electrical connection relationship between the conductive portions 20 and 211 is established. Other configurations such as a rotation mechanism of the turntable 210 and an electrical wiring portion from the conductive portion 211 are the same as those in the above-described embodiment, and thus illustration and description thereof are omitted.

  By the way, the number of electronic circuits mounted on the disk is not limited to one, and a plurality of electronic circuits may be mounted. In some cases, power is supplied to the electronic circuit from the outside. In such a case, a transmission path for signals (all power, etc.) to the outside (disk drive device side) must be formed correspondingly. As in the case of mounting a plurality of electronic circuits in this way, it is possible to use a plurality of conductive portions, and according to such a configuration, it is possible to further expand the field of use.

  In the present embodiment, in order to satisfy such a demand, a plurality of electrically separated conductive portions are formed on the disk, and the disk drive device side clamper, turntable, etc. Similarly, electrically isolated conductive portions are formed at portions corresponding to the plurality of conductive portions, and the disk and the disk drive device side are electrically connected through these conductive portions.

  As shown in FIGS. 1 to 4, the conductive portion formed on the disk may have any size and shape, but it is reliable in consideration of alignment with the contact portion of the disk drive device side with the disk side. In order to obtain electrical contact, a configuration as described below can be adopted.

  As the conductive portion formed on the disk, a plurality of conductive portions that are concentric, annular, arc, or linear in the circumferential direction can be formed in a state of being electrically separated in the radial direction. In the contact portion (clamper, turntable, etc.) with the disk on the disk drive device side, a conductive portion that is concentric, annular, arc-shaped, or linear in the circumferential direction at the corresponding position is electrically connected in the radial direction. Can be formed in an isolated state. In this way, reliable electrical contact can be obtained by associating only the radial positions.

  In other words, the conductive portion of the contact portion (clamper, turntable, etc.) with the disk on the disk drive device side can be formed into an annular shape, an arc shape, or a linear shape in order to easily and surely contact the conductive portion of the disk. . In addition, the width and circumferential length of the conductive portion can be made wider than the width and circumferential length of the conductive portion of the disk. Conversely, the conductive portion on the disk drive device side may have a limited length in the circumferential direction as shown in FIGS. 1 to 4, and the conductive portion formed in the corresponding portion on the disk side may be in an annular shape or an arc shape. The shape of the conductive portion is arbitrary, and can be arbitrarily adopted on the disk or disk drive device side.

The conductive part on the disk drive device side is annular (may be partly separated), and the conductive part on the disk side is longer in the radial direction to make more reliable contact with that on the disk drive device side. It can be a shape. As described above, it can be formed at a corresponding position (contact position) with the annular portion. Of course, the disk side can also be annular.
Although the circumferential conductive portions formed on the disc in the radial direction can be used for a plurality of signal exchanges, the corresponding annular conductive portion on the disc drive apparatus side can also have the same configuration as described above.

  FIG. 15 shows an example of a conductive portion formed on a disk, and shows a case where two electronic circuits 10 and 11 are mounted. Conductive portions 20 and 21 connected to the electronic circuits 10 and 11 via electrical connecting wire portions 30 and 31 are formed at different positions in the radial direction. At this time, the conductive portion formed in the contact portion (clamper, turntable, etc.) with the disk on the disk drive device side does not contact with the conductive portion formed in the radially different portion on the disk (two The radial position and width of the conductive portion formed in the contact portion (clamper, turntable, etc.) with the disk on the disk drive device side are set so as not to contact the conductive portion on the disk. Since the clamp region is the same as in FIGS.

  FIG. 16 shows a configuration example for supplying power necessary for operating the electronic circuit 10 to the electronic circuit 10 via the conductive portion 21 and the connection line portion 31. In this configuration example, power is always supplied to the electronic circuit 10 on the disk via the conductive part 21 and the connecting line part 31 even during the disk rotating operation. Since the power source does not need to be affected by noise, the power source from the disk drive device side or the outside can be supplied relatively easily without any problem even if there is contact with the rotating part. Here, an electronic circuit and a rechargeable battery unit are formed on the optical disc, and the battery unit can be configured to be charged by supplying power from outside the route different from the electronic circuit. is there.

  In the example shown in FIG. 17, a plurality (two in this embodiment) of conductive portions 20 and 21 formed on a disk are formed in an annular shape or an arc shape having a predetermined width, and are arranged separately from each other in the radial direction. It is. In this case, the width and position of the conductive portion formed in the contact portion (clamper, turntable, etc.) with the disk on the disk drive device side are configured to contact only the corresponding conductive portion on the disk side. In the case of the present embodiment, the inner peripheral conductive portion 21 requires wiring of the connection portion 31 for connection to the corresponding electronic circuit 11 across the outer conductive portion 20. In the example shown in FIG. 17, the insulating film 50 is formed on the straddling (outer peripheral) conductive portion 1 </ b> A, and the wiring (connection line portion) 31 is formed over the insulating film 50. An insulating film 51 can be further formed thereon.

  Further, the annular conductive portion is not necessarily connected in the entire circumferential direction. Therefore, if the middle of the conductive portion of the outer peripheral portion is cut out (the state where the conductive portion does not exist), and the connection portion from the conductive portion of the inner peripheral portion is disposed in this portion, the insulating film is formed. There is no need to keep it. FIG. 18 shows such an embodiment, in which three electronic circuits 10 to 12 are mounted on the disk 100, and three annular conductive parts 20, 21, 22 are formed from the inner side toward the outer side. Cutout portions X and Y where no conductive portion exists are formed in the conductive portion 22, and a cutout portion Z is formed in the middle conductive portion 21. The conductive portion 22 is connected to the electronic circuit 10 via the connection line portion 30.

  The connection line portion 32 extending from the conductive portion 20 is connected to the electronic circuit 12 through the cutout portions Z and Y, and the connection line portion 31 extending from the conductive portion 21 is passed through the cutout portion X to the electronic circuit 11. Connected to. In order to prevent contact other than the corresponding conductive portion of the upper clamper of the disk 100, an insulating film is formed on the connection line portions 31 and 32.

  The same applies to the above description and the following description, but the width, position, and shape of the conductive portion formed in the contact portion (clamper, turntable, etc.) with the disk on the disk drive device side correspond to those formed in the radial direction of the disk. It is comprised so that it may not contact electrically conductive parts other than the annular | circular shaped and circular arc shaped electrically conductive part. Therefore, the three contact portions with the disk on the disk drive apparatus side are positioned in the radial ranges of α, β, and γ, respectively.

  In FIG. 19, the annular lower conductive portion 20 is widened, an insulating film (not shown) is formed on the inner peripheral side of the surface of the lower conductive portion 20, and the upper conductive portion 21 is formed on the insulating film. The connection line portion 31 from the upper conductive portion 21 is formed on the insulating film 54 formed therebelow and is connected to the electronic circuit 10. Again, an insulating film 55 is formed on the connection line 30.

  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 the circuit is also possible. That is, it is not a power supply or power supply by the rotating / stationary body signal transmission / reception interface 70 (electrical or optical connection units 330 and 410 in the embodiments described later) arranged as shown in FIG. At the time of charging, the disk is not rotated, and an external power supply can be electrically supplied directly to the conductive portion of the disk drive device, or a signal can be exchanged with an electronic circuit.

  In the embodiments of the disk drive device described above, the conductive portion of the contact portion (clamper, turntable, etc.) with the disk on the disk drive device side is an annular shape so that the conductive portion of the disk can be contacted easily and reliably. Is desirable. In addition, it is also preferable that the width and circumferential length of the annular conductive portion be wider than the width and circumferential length of the conductive portion of the disk. As described above, the shape of the conductive portion on the disk and the disk drive device side is arbitrary, but both can be circular, or one can be circular and the other can be a circular conductive portion. Further, in order to obtain a more reliable electrical connection, it is also desirable to have a shape (one is a concave shape and the other is a convex shape) such that the conductive portion is fitted during clamping. At this time, it is more preferable if the material is an elastic material.

  As described above, when a plurality of electronic circuits or the like are mounted on the disk, a contact portion (clamper or turntable) with the disk on the disk drive device side for electrical connection with each electronic circuit. Etc.) A plurality of conductive portions are formed corresponding to each. For example, specific examples corresponding to the examples shown in FIGS. 12 to 16 will be described below.

  FIG. 20 shows a simplified schematic cross-sectional view of the vicinity of the turntable and clamper of the disk drive device based on the embodiment of FIG. 5 for ease of explanation. Of course, the same applies to the configurations of FIGS.

  FIG. 20 is a view showing the conductive parts 20 and 21 formed at different positions in the radial direction of the disk in the embodiment shown in FIG. 15 (when two electronic circuits 10 and 11 are mounted on the disk). Conductive portions 211 and 212 are formed at different positions in the radial direction on the turntable 210, which are contact portions with the disc 100 on the disc drive device 200 side, at the opposing positions. At this time, the conductive portion 212 is in contact with only the conductive portion 21 and is not in contact with the other conductive portions 20. The signal transmission path from the conductive portion 212 to the internal electric circuit 80 is the same as that shown in FIGS. That is, an electrical or optical connection portion 339A (not shown) similar to the electrical or optical connection portion 330 is disposed via the wiring 3 from the conductive portion 212, and further, this electrical or optical connection portion 330A is opposed. The internal electrical circuit 80 is connected through a path of an electrical or optical connection 410A (not shown) similar to the electrical or optical connection 410.

  When power is supplied to the electronic circuit as shown in FIG. 16, the configuration as shown in FIG. 20 can be adopted, and the power supplied via the conductive part 212 on the disk drive device side and the conductive part 21 of the disk is supplied to the electronic circuit 10. To be supplied. Further, in the case where a rechargeable battery is provided on the disk, power can be supplied to the battery via the conductive portion 212 and the conductive portion 21. With this configuration, power is always supplied even during disk rotation. Further, even when the disk is not rotating and is stopped, it is possible to supply power if it is configured to force both conductive parts to contact each other. By doing so, the battery can be charged when the disk rotation is stopped.

  Further, in the disk drive device corresponding to the embodiment shown in FIGS. 15 to 19 in which the conductive portions formed on the disk have an annular shape with a predetermined width and are spaced apart from each other in the radial direction, the turn of the disk drive device is A plurality of conductive portions having a predetermined width, length, position, shape and the like may be formed above the table 210 so as to contact only the corresponding conductive portions on the disk side.

  In the above-described embodiment, the connection portion is provided corresponding to each conductive portion on the disk drive side. However, the number of connection portions is one, and a single connection portion is obtained by multiplexing signals flowing to a plurality of conductive portions. It is possible to simplify the configuration by exchanging signals via the.

  The conductive portion on the disk side and the disk drive device side only needs to be determined in position, shape, size, etc. so that they can reliably come into contact with each other. For this purpose, an arbitrary configuration not limited to the above-described embodiment is used. be able to.

  As described above, conventionally, only reflected light responding to laser light irradiation is received and information on the optical disk side is read, but in the present invention, the above-described wide concept electronic circuit is configured on the optical disk surface. In addition, a conductive part is provided as an electronic function part that is connected to the electronic circuit or generates some signal information, and electrical information is transmitted through the conductive part on the optical disk side and the conductive part on the disk drive device side. Since transmission / reception is possible, as described above, it is possible to easily expand a significant field of use.

  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 is stored in the RAM area of the optical disk, in the electronic circuit or in a separate memory, etc. It can also be configured to write to, and the processing is optional.

  The disk drive device according to the present invention does not require a turntable or a clamper. In short, any disk drive device that holds or holds (clamps) a disk and rotates the disk may be used.

  Also, in order to obtain reliable electrical contact and connection between the conductive parts, a plurality of conductive parts connected to one electronic circuit or the like can be arranged separately, and the conductive parts are formed in a comb shape. Alternatively, the conductive portion can be formed with irregularities, the conductive portion can be formed to include an elastic material, or an elastic material can be disposed under the conductive portion to increase the contact area between the surfaces. On the other hand, from the viewpoint of clamping, since it is not preferable that there is slippage, it is desirable that the surface material be a material that does not slip easily. However, since the area where the conductive part is formed is smaller than the area of the clamp part of the disk or drive, the influence is often small.

  The part on which the disk on the turntable is placed and clamped (similarly the conductive part on the clamper side) is usually a few millimeters wide and narrow, and if the conductive part is formed there, the clamping function deteriorates. That is, since the disc mounting portion is usually made of a material that does not slide the disc, its function deteriorates when the conductive portion is formed. In particular, when the conductive portion is formed in the circumferential direction, it becomes easy to slip. Therefore, such a problem can be alleviated by forming a narrow vertical conductive portion in the width direction of the narrow disk mounting portion (disk radial direction) as the conductive portion. If a plurality of the vertical conductive portions are provided apart from each other in the circumferential direction of the disk, reliable electrical contact can be obtained without substantially affecting the disk clamp and without slipping.

  In a preferred embodiment of the present invention, a RAM area (information storage unit) in which data such as music and images is stored as optical data on one surface of the optical disc 100, and a ROM area (indispensable as a storage area for programs, etc.) Or the like, and at least one electronic circuit 10 and a conductive portion as described above are provided on the other surface of the optical disc 100. Such a configuration reduces the restrictions on the installation location of the electronic circuit 10, ensures its stable operation, and enables reliable electrical connection. In addition, the electrical connection with the conductor portion 20 that contributes to the connection with the electronic circuit 10 is opposite to the surface on which the signal transfer (write / read) operation with the storage area of the optical disk by the optical pickup is performed. The means for electrical connection, the arrangement of the components, and the design are greatly increased in both physical and electrical margins, and the superiority in design is enhanced.

  Now, in general, the part where the optical disk is held and gripped by the clamping means of the disk drive device is not the entire clamp part CLAMP in FIG. 2, but the part (substantially clamp part) excluding the inner peripheral part thereof. For example, a mounting portion having an annular elastic, non-slip material having a predetermined width is usually provided on the outer peripheral portion of the surface of the turntable, and an optical disk is mounted on the mounting portion, and as described above, a clamper or a clamp pin The optical disk is rotationally driven by being held and gripped by, for example.

  In the embodiment shown in FIG. 2, the portion of the inner peripheral portion IN where the disk mounting portion of the turntable and the clamper are in direct contact (contact) is defined as a substantial clamp portion CLAMP, and the inner peripheral region other than the substantial clamp portion is the clamp region. Therefore, in this embodiment, the electronic circuit 10 as described above is provided in this region. Therefore, the electronic circuit 10 does not apply any pressure and can avoid the clamping pressure. The conductive part 20 is formed in the substantial clamp part, and the electronic circuit 10 and the conductive part 20 are connected by the electrical connection part 30.

  Next, FIG. 21 is a simplified perspective view of an optical disc showing another embodiment of the present invention, in which an electric path is formed in one electronic circuit 10 through a plurality of paths of conductive portions. The electronic circuit 10 mounted at a position where the clamping pressure is not applied is formed at the peripheral end portion of the central opening hole, and is disposed at the clamping position with the conductive portion 20A connected to the electronic circuit 10 via the connection portion 30A. It is connected to both of the conductive parts 20 provided and connected to the electronic circuit 10. For example, when two paths are connected to one electronic circuit, the plurality of paths can be formed as a signal exchange path and a power supply path. One can be used for backup by using it for the same purpose (signal exchange path and power supply path). By doing so, even if there is a problem with one route, the other route can be used effectively. In this way, the way of using the conductive portions (electronic circuits) having a plurality of paths can be arbitrarily set.

  In the embodiment shown in FIG. 21, as two paths, a conductive portion 20 and a conductive portion 20A as shown in FIG. 9 are formed on the disk 100 as shown in FIG. As shown in FIGS. 7 and 12, a conductive portion 211 and a clamp pin 280 on the disk drive device 200 side that come into contact with each conductive portion at the time of clamping are provided. At the time of clamping for disk rotation, the electrical connection between the conductive portions 20 and 211 and the electrical connection between the conductive portion 20A and the clamp pin 280 are established, and the above two paths are obtained. The conductive portions 20 and 211 can be used as a signal transmission / reception path for signal transmission / reception, and the conductive portion 20A and the clamp pin 280 can be used as a power supply path. These can also be applied to a plurality of electronic circuits, and can be formed on one side or both sides of the disc.

  When electronic circuits are provided on both sides of the disk, advanced operation processing can be secured by operating these electronic circuits simultaneously, and a plurality of electronic circuits and conductive parts connected thereto are formed on both sides of the disk. The disc has a characteristic structure.

  Next, as another embodiment of the present invention, even when the electronic circuit and the conductive portion are formed on only one surface of the disk, the electronic circuit and the conductive portion are formed on both surfaces. The disk drive device that enables the operation corresponding to each will be described. The present embodiment can also be used with a normal disk not equipped with an electronic circuit.

  In the present embodiment, conductive portions that are in contact with the conductive portions on both sides of the disk are provided on the disk drive device side. In the present embodiment, when the conductive portion on the disk side is formed on one surface or both surfaces, an electrical contact with each is detected and the electronic circuit on the side with the electrical contact is operated. The electrical contact can be detected by a well-known method. For example, the reference potential can be detected by applying a predetermined reference potential to the conductive portion on the disk side. The reference potential can also be ground. It is also possible to form a closed electrical connection circuit on the drive side by the conductive part on the disk side so as to be detected and operated. Such a configuration can be used to identify a plurality of conductive portions (electronic circuits).

Various embodiments of the present invention other than those described above will be described below.
The disk drive device of the present invention can also be used in the case of a normal disk not equipped with an electronic circuit and a conductive part. In other words, if there is no conductive portion on the disk side, the conductive portion on the disk drive device side is in an electrically floating state, so that it can operate and function as a normal disk drive device. When a plurality of electronic circuits are mounted, it is possible to reduce the balance loss if they are arranged on substantially the same center (circumferential direction of substantially the same diameter).

  When two electronic circuits are mounted on the 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.

  The pair of conductive portions that are in electrical contact with each other formed on the disk and the disk drive device side can be formed at positions where they are in contact with each other at the time of clamping. It suffices to form a separation in the radial direction so as to prevent electrical contact between the matching conductive portions). Here, if at least one of the pair of conductive portions is formed into an annular shape, the contact area is widened and reliable electrical connection is possible.

  The same applies to the case where a plurality of conductive parts for a plurality of electronic circuits are formed on one surface of a disk, and a signal is transmitted between the conductive part provided corresponding to the disk drive device side and the electronic circuit from the conductive part. Give and receive. Here, the number of conductive portions provided on the disk side and the disk drive device side can be any number. If a positional relationship is established so that they are connected to each other at the time of clamping, the corresponding corresponding conductive portions are in contact with each other. Therefore, signals can be exchanged only between the two.

  In the above-described embodiment, a photoelectric conversion unit (photodiode) or a radio unit (antenna) can be used instead of the conductive unit. 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 both antennas, at least one antenna surface may be covered with a protective film (for example, an insulating film). For example, the signal received by the antenna is transmitted through a path as described with reference to FIGS. The antenna arrangement position in the disk drive device is, for example, a concave part further inside the annular (ring-shaped) member that is slightly placed on the above-described turntable disk, and is opposed to the concave part. An antenna corresponding to the portion may be provided. 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 may be a continuous annular shape or an arc shape.

  FIG. 22 is a simplified cross-sectional view of a main part of a disk drive device showing an example of the disk drive device corresponding to FIG. Referring to FIG. 22, the disk 100 is placed on an annular placement portion 210 </ b> A that is provided on the outer peripheral portion of the upper surface of the turntable 210 and includes a material whose surface is difficult to slip, and is clamped by a clamp pin 280 and driven to rotate. The The inner side (center side) of the placing portion 210A of the turntable 210 is a concave portion, and an antenna 290 is provided on the surface 210B. On the other hand, an antenna 150 is provided at a position facing the antenna 290 of the disk 100. Since the antennas 150 and 290 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 as in the prior art. The antenna 290 provided on the turntable 210 is formed in the circumferential direction, and is preferably formed in an annular shape or an arc shape. By adopting such a shape, as long as the antenna 150 provided on the disk 100 is substantially concentric with the antenna 290, radio waves can be exchanged and reliable communication can be performed. Here, the antenna 290 can include an electronic circuit as a wireless unit or a signal processing circuit. FIG. 23 is also an embodiment configured based on the same concept, and antennas 150 and 290 are installed at positions facing the clamper 260 side and the optical disc 100.

  The same applies to the case where a photoelectric conversion unit is used instead of the antenna, but the arrangement position may be set appropriately in consideration of the fact that light transmission is linear unlike radio waves. That is, the photoelectric conversion unit determines the opposed installation position relatively accurately as compared with the antenna.

  By the way, according to the above-described embodiment, a reliable contact between the conductive portion on the disk side and the corresponding conductive portion on the disk drive device side is established, but the corresponding conductive portion on the disk side and the corresponding conductive portion on the disk drive device side are established. If the positional relationship with the conductive portion is not reliable at the time of clamping, and it is necessary to align both conductive portions at the time of clamping, means for that is required. For example, an electrical or optical mark serving as a reference for positioning is provided on the disk, and the disk drive device recognizes this mark and rotates the disk to adjust the position. Can be done.

  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.

  In the above-described embodiments, the corresponding conductive portion to be paired on the disk and the disk drive device side is formed at the position corresponding to the clamp, and positioning of the conductive portion to be paired is important, but the concept of “pair” is considered. If the disk and the conductive part on the disk drive device side are finally connected, the disk drive device identifies based on the signal from the electronic circuit (conductive part) of the connected disk, and the identification result Based on the above, it is determined whether a signal from the disk side is to be supplied to a circuit connected to which conductive part on the disk drive device side, and the switching means switches to the circuit to be supplied. be able to. At this time, each electronic circuit is configured to generate a unique identification signal.

  Regarding the formation of the conductive part, when the disk is pressed and clamped from both sides by the clamping pressure, the conductive part formed on the disk and the conductive part that contacts the disk during clamping may be formed on the disk drive device side. It can be made not to be limited to. For example, a conductive portion is formed at a height portion reaching the upper surface of the concave portion in the concave portion of the inner portion of the member made of an annular non-slip material of the disk mounting portion of the turntable, while the conductive portion is formed in the corresponding disk portion. The two conductive parts are brought into close contact with each other when the disk is pressed against the turntable by the clamp and the object of the present invention can be achieved. Not only the inner concave portion, but also a conductive portion may be formed at a portion that is in close contact with each other during clamping.

  As the electrical connection portion 30 or the like, a thin film is usually formed on the disk surface, but it is also a characteristic configuration that it is formed by penetrating in the thickness direction of the disk. For example, as shown in FIG. 24, the electronic circuit 10 is mounted on a portion of one surface of the disk 100 where the clamping pressure is not applied, and a connection portion 30 connected to the electronic circuit 10 is formed on one surface of the disk. On the other surface of the disk 100, a conductive part 20 is formed in clamping contact with the conductive part on the disk drive device side. The conductive part 20 and the connection part 30 are connected by a conductive terminal 33 embedded in the thickness direction of the disk 100. Connect electrically. Thus, the structure which electrically connects both disk sides by the conductive terminal 33 is obtained.

  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.

Claims (3)

At least one clamp pin that presses the disk toward the turntable is provided in the circumferential direction of the protrusion into which the center opening hole of the disk is inserted, and the center opening hole of the disk is inserted into and fixed to the protrusion. In the disk drive device that rotationally drives
An electronic circuit is mounted on the disk, a conductive portion electrically connected to the electronic circuit is formed at an inner peripheral end of the central opening hole, and a central opening hole of the disk is inserted into the protruding portion. In this state, the clamp pin and the conductive portion formed at the inner peripheral end of the central opening hole of the disc are configured to be in electrical contact with each other, and the clamp pin and the electric portion are electrically connected to the central portion of the protruding portion. Is connected to the first photoelectric conversion means, and is opposed to the first photoelectric conversion means, and the second photoelectric conversion means is provided at the stationary portion of the disk drive device. A disk drive device characterized by that. A disk signal processing system for exchanging signals between an electronic circuit mounted on a disk and a disk drive device that rotationally drives the disk,
At least one clamp pin that presses the disk toward the turntable is provided in the circumferential direction of the protrusion into which the center opening hole of the disk is inserted, and the center opening hole of the disk is inserted into and fixed to the protrusion. In the disk drive device that rotationally drives
An electronic circuit is mounted on the disk, a conductive portion electrically connected to the electronic circuit is formed at an inner peripheral end of the central opening hole, and a central opening hole of the disk is inserted into the protruding portion. The clamp pin and the conductive portion formed at the inner peripheral end of the central opening hole of the disk are configured to be in electrical contact with each other. A first photoelectric conversion means electrically connected to the clamp pin is provided at the center of the protrusion, and is positioned opposite to the first photoelectric conversion means, and is located at a stationary part of the disk drive device. A disk signal processing system, wherein a second photoelectric conversion means is provided, and signals are exchanged via the first and second photoelectric conversion means. A central opening hole of the disk is inserted into the protrusion on the disk drive side, and three clamp members are provided to press the disk toward the turntable in the circumferential direction of the protrusion where the central opening hole of the circumferential disk is inserted. In the disk drive device for rotationally driving the disk by inserting and fixing a central opening hole of the disk in the protruding portion,
An electronic circuit is mounted on the disk, and three conductive parts electrically connected to the electronic circuit are formed at the inner peripheral end of the central opening hole, and the central opening hole of the disk is formed in the protruding part. And the clamp member and each of the conductive portions formed at the inner peripheral end of the central opening hole of the disc are configured to be in electrical contact with each other. A first photoelectric conversion means electrically connected to the clamp member is provided at a central portion of the projecting portion, and is positioned opposite to the first photoelectric conversion means, and is disposed at a stationary portion of the disk drive device. Is a disk drive device provided with second photoelectric conversion means.

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