JP2005235255A - Disk camcorder - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a disk camcorder wherein a disk collision risk is eliminated. <P>SOLUTION: In a disk holder, a highly planar turntable 25 is provided to come into contact with a disk medium surface in a full radius from a disk medium inner periphery to an outer periphery, thereby supporting the disk medium. In a disk outermost diameter position on the turntable 25, a mechanism for regulation is installed in a disk medium thickness direction. Thus, a disk is corrected to a turntable plane even when the disk 91 is bent. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a mechanical configuration of a disk camcorder including a camera body having an imaging lens and a recording device that records an imaging signal from the camera body on a disk medium.

  In recent years, the field of high density recording data has been remarkably growing in disk media. For this reason, in the case of an optical disk medium, the density of the disk is increased by setting the optical wavelength of the signal recorded on the disk to a very short wavelength. As a result of the light wavelength becoming shorter, the working distance of the objective lens serving as an optical interface with the disk is required to be very small, and 1 when a blue laser is used as the laser light source. It is a very short distance of 0.0 mm or less. As a result, there is a risk of collision between the disc and the objective lens even with light vibration applied to the disc device. If the disc and the objective lens collide with each other and the objective lens is damaged, not only does the error rate increase significantly, but tracking and focus control cannot be performed at all, and the disc system does not function.

In order to cope with this, a proposal such as Patent Document 1 (Pioneer, Maeda, pickup device) has been made. This proposed anti-collision device comprises a portion that comes into contact with the surface of the optical information recording medium prior to the objective lens when the objective lens approaches the surface of the optical information recording medium.
JP 2002-025094 A

  The conventional anti-collision device has a structure in which the objective lens itself is not in direct contact with the disk medium, so the objective lens itself is not damaged, and the disk device can prevent a continuous error rate increase. It is. However, since it is very difficult to select an ideal material for a member that contacts the disk used as a cushioning material, it is inevitable that the disk is damaged at the time of collision. Once the media has been scratched, the error rate increases each time recording / playback on the damaged portion of the media is performed not only on the disc device but also on another disc device. To do.

  An object of the present invention is to provide a disc camcorder that solves the above-mentioned problems and eliminates the risk of disc collision by fixing the distance between the objective lens and the disc constant. To do.

  To achieve the above object, a disc camcorder according to the present invention is a disc camcorder comprising a camera body having an imaging lens, and a recording device for recording an imaging signal from the camera body on a disk medium. The disk holder is provided with a high flatness turntable that contacts the disk medium surface with a predetermined radial width from the inner periphery to the outer periphery of the disk medium and supports the disk medium, and the outermost disk medium on the turntable is provided. It is characterized in that a mechanism for restricting the disk medium thickness direction with respect to the radial position is provided.

  According to the present invention, the disc can be corrected to the turntable plane even if the disc is warped. Therefore, it is possible to eliminate the risk of collision that has been distributed depending on the disc position and the manufacturing accuracy. Is obtained.

  The optical disk control apparatus according to the present invention will be described below.

(First embodiment)
FIG. 2 is a schematic view of a camera-integrated disc camcorder equipped with an optical disc control device according to the present invention. FIG. 3 is also a schematic diagram of a camera-integrated disc camcorder equipped with the optical disk control device of the present invention, and is a diagram when the optical disk control device of the present invention is projected from the back (B) direction of FIG.

  The optical disk control device according to the present invention includes a disk holder for a user to insert a disk medium into a camera-integrated disk camcorder, a spindle drive unit that rotates the disk medium in the disk holder, and a data signal to the disk medium. Consists of an optical pickup for recording. In the schematic diagram of FIG. 3, among the components, the disk holder is depicted in both an open state and a closed state.

  FIG. 1 is a mechanical configuration diagram of the optical disk control device according to the first embodiment of the present invention, and is a diagram showing only the closed state of the disk holder in FIG.

  In FIG. 1, 11 is a clamper spring. 12 is a clamper holder. 13 is a disk clamper. 21 is a spindle motor drive coil. 22 is a disk holder frame. 23 is a slide ring. 24 is a slide pin. 25 is a turntable. 51 is a main body frame. 52 is a bearing. 53 is a fixing magnet. 56 is a guide shaft holder. 57 is a seek guide shaft. 58 is an optical pickup unit. 59 is a seek motor. 41 is a centering cone. 42 is the center hole of the turntable. Reference numeral 91 denotes a disk medium.

  As shown in FIG. 1, in this embodiment, the disk medium 91 is in contact with the disk medium surface with the entire radius from the inner periphery to the outer periphery of the disk medium, and is supported by the turntable 25 having a high flatness that supports the disk medium. It is the substrate surface side of the disk medium that contacts the turntable. In order to write and read recording data to and from the disk medium, the surface on which the laser light is incident is the cover layer side opposite to the substrate surface, and this surface is located on the opposite side to the turntable side. The turntable is composed of a disk-shaped part with high planar accuracy, and a disk with a warp is corrected to a flat surface by pressing and restraining it with a disk clamper 13 in the disk thickness direction. The correction of the disk by the disk clamper and the turntable is performed when the user inserts the disk into the camera-integrated disk camcorder apparatus. That is, it is carried out in the open state of the disc holder in FIG.

  This will be described with reference to FIGS. 4, 5, and 6. FIG. 4 is a view of the turntable viewed from the direction (A) of FIG. 2 in the disc holder open state. 13 disc clampers directly restrain the disc medium of FIGS. In this embodiment, as shown in FIG. 4, a total of six disc clampers are arranged for each 60-degree division. FIG. 5 is an enlarged view of the disk clamper at one place in the disk clamper mounting portion of FIG. 4 in order to explain the operation of the disk clamper. In order to easily understand the operation of the disk clamper, the clamper holder 12 depicted in FIG.

  FIG. 6 shows a cross-sectional view projected in a direction perpendicular to FIG. 5 for further understanding of the operation of the clamper holder, the left figure side is a state diagram in which each part is assembled, and the right side is a state figure in which each part is separated. Indicates. As shown in FIG. 4, in the standby state, the disc clamper is pressed toward the turntable rotation center by a clamp spring 11 installed on one surface of the turntable. At the time of inserting / removing the disc, the cam structure formed on the disc clamper 13 is pushed toward the outer periphery of the turntable by the slide movement of the slide pin 24 integrated by caulking to the slide ring 23 or press-fitting. The tip of the L-shaped protrusion opens larger than the maximum diameter of the disk medium, and the disk medium is guided into the L-shaped protrusion.

  That is, at the time of inserting / removing the disc, the user slides the operation pin 31 integrated by caulking or press-fitting to the slide ring 23. Then, the slide pin 24 that is simultaneously integrated with the slide ring 23 slides the disc clamper 13 toward the outer periphery of the turntable, so that the disc fits between the turntable and the L-shaped projection of the disc clamper. Immediately after that, it is pressed and fixed in the disc thickness direction between the L-shaped projections of the turntable and the disc clamper. In this embodiment, in order to clarify the contents of the invention, the operation at the time of inserting / removing the disc is a method by a manual operation to the operation pin 31 by the user. Of course, such a manual clamping method is inefficient. The method of automatically operating the disk clamper is more preferable, but it goes without saying that even the method of automatic operation can be easily realized within the technique described in the present invention. Here, the length in the disk radial direction of the L-shaped protrusion of the disk clamper 13 is set to a sufficiently short dimension so as not to interfere with the access range of the optical pickup unit.

  In the first embodiment, a regular magnetization pattern is provided on the outer periphery of the turntable 25, and the turntable itself is configured as a rotor of a spindle motor. With this configuration, the spindle motor drive diameter is increased and stable motor rotation can be obtained, so that it is possible to significantly improve jitter when converting to high-density optical disk data. The drive source of the spindle motor is constituted by a stator coil shown in FIGS.

  The most important device in the optical disk apparatus is an optical pickup. The distance between the optical component mounted on the optical pickup and the disk medium needs to be accurately positioned in all of the focusing, tracking, and tilt directions. In the configuration of the present embodiment, a mechanism for accurately matching the relative position of the rotation center of the spindle motor and the drive shaft of the pickup is provided to deal with this problem.

  In FIG. 1, the center hole 42 of the turntable, in which the radial dimensions of each part of the turntable 25 and the exact coaxial accuracy are provided, serves as the center of rotation of the spindle motor and at the same time as the positioning center with the pickup. That is, when the disc holder is closed after the disc is mounted on the turntable, the tip tapered portion of the centering cone 41 waiting on the main body side catches the disc medium center hole and the center hole of the turntable. Since the centering cone 41 and the center hole 42 of the turntable are made of a magnetically permeable material, they are connected and fixed by a fixing magnet 53 directly connected to the centering cone 41 simultaneously with the center alignment.

  In FIG. 1, the image of the fixing magnet is drawn as a permanent magnet, but in order to be able to open it with a slight force when the disk holder is opened, the electromagnet or the permanent magnet is mechanically moved to make a magnetically permeable material. The method of breaking the contact with the centering cone 41 is preferable. The centering cone 41 and the turntable 25 are integrated by a magnetic force, so that a rotating body is formed by the driving force of the spindle motor while sandwiching the inner diameter hole of the disk medium 91 in the thickness direction. The center of the rotating body is captured by the bearing 52, and as a result, the relative mechanism position of the optical pickup unit 58 is determined.

  That is, the unit groups of the guide shaft holder 56, the seek guide shaft 57, the optical pickup unit 58, and the seek motor 59 to which the bearings are attached are firmly connected to each other. State, not fastened. Therefore, when the center of the bearing is integrated with the rotation center of the spindle motor, the optical pickup unit moves to a mechanical position that matches the rotation center of the spindle motor. The position of the optical pickup unit is not affected by the position of the main body side frame at this time. The optical pickup unit performs seek control, focus control, tracking control, and the like along the seek guide axis in a mechanical position centered on the rotation of the spindle motor.

  As described above, since the optical pickup unit is held in a state where the relative position with respect to the disc is maintained, the user's operation vibration applied to the disc camcorder main body side gives to the optical control operation performed on the optical pickup unit. The effect can be kept extremely small.

(Second embodiment)
Next, a second embodiment of the present invention will be described.

  FIG. 7 is a mechanical configuration diagram of the optical disk control device according to the second embodiment of the present invention, and is a diagram showing only the closed state of the disk holder in FIG.

  In FIG. 7, 11 is a clamper spring. 12 is a clamper holder. 13 is a disk clamper. 22 is a disk holder frame. 23 is a slide ring. 24 is a slide pin. 25 is a turntable. 51 is a main body frame. 52 is a bearing. 53 is a fixing magnet. 54 is a spindle motor rotor. 55 is a spindle motor drive coil. 56 is a guide shaft holder. 57 is a seek guide shaft. 58 is an optical pickup unit. 59 is a seek motor. 41 is a centering cone. 42 is the center hole of the turntable. Reference numeral 91 denotes a disk medium.

  As shown in FIG. 7, also in the second embodiment, the disk medium 91 is in contact with the disk medium surface at the entire radius from the inner periphery to the outer periphery of the disk medium, and is turned by a high flatness turntable 25 that supports the disk medium. To support. The turntable is composed of a disk-shaped part with high planar accuracy, and a disk with a warp is corrected to a flat surface by pressing and restraining it with a disk clamper 13 in the disk thickness direction. The correction of the disk by the disk clamper and the turntable is performed when the user inserts the disk into the camera-integrated disk camcorder apparatus. The above contents are the same as in the first embodiment.

  In the first embodiment, a regular magnetization pattern is provided on the outer periphery of the turntable 25 and the turntable itself is configured as the rotor of the spindle motor. However, in the second embodiment, the turntable 25 is directly connected to the centering cone. A portion 54 is configured as a rotor of a spindle motor, and a drive force from a stator 55 is obtained to rotate the disk. However, since the centering cone uses a magnetically permeable material, the centering cone and the rotor are connected by sandwiching a material that isolates magnetism. In the configuration of the second embodiment, the diameter of the spindle motor drive source can be made small and compact, but a large motor drive force is required.

  The configuration of the second embodiment is the same as that of the first embodiment in that a mechanism for precisely matching the relative positions of the rotation center of the turntable and the drive shaft of the pickup is provided. In FIG. 7, the center hole 42 of the turntable, in which the dimensions of each part of the turntable 25 in the radial direction and the accurate coaxial accuracy are provided, serves as the center of rotation of the spindle motor and at the same time as the positioning center with the pickup. That is, when the disc holder is closed after mounting the disc on the turntable, the tip tapered portion of the centering cone 41 waiting on the main body side captures the positions of the disc medium center hole and the center hole of the turntable. Since the centering cone 41 and the center hole 42 of the turntable are made of a magnetically permeable material, they are connected and fixed by a fixing magnet 53 directly connected to the centering cone 41 simultaneously with the center alignment.

  The centering cone 41 and the turntable 25 are integrated by a magnetic force, so that a rotating body is formed by the driving force of the spindle motor while sandwiching the inner diameter hole of the disk medium 91 in the thickness direction. The center of the rotating body is captured by the bearing 52, and as a result, the relative mechanism position of the optical pickup unit 58 is determined. That is, the unit groups of the guide shaft holder 56, the seek guide shaft 57, the optical pickup unit 58, and the seek motor 59 to which the bearings are attached are firmly connected to each other. State, not fastened.

  Therefore, when the center of the bearing and the rotation center of the turntable are integrated, the optical pickup unit moves to a mechanical position that matches the rotation center of the turntable. The position of the optical pickup unit is not affected by the position of the main body side frame at this time. The optical pickup unit performs seek control, focus control, tracking control, and the like along the seek guide axis in a mechanical position centered on the turntable rotation.

  As described above, in the disc camcorder described in the above embodiment, a turn of high flatness that supports the disc medium by contacting the disc medium surface with the entire radius from the inner circumference to the outer circumference of the disc medium in the disc holder. A table is provided, and a mechanism that regulates the thickness of the disc medium in the direction of the thickness of the disc medium at the outermost diameter position of the disc medium on the turntable allows the disc to be corrected to the turntable plane even if the disc is warped. Therefore, the risk of collision, which was distributed in various ways depending on the disk position and manufacturing accuracy, was eliminated.

  Furthermore, a centering means is provided at the rotation center of the turntable, and when the disc holder is in a closed state, the centering means on the turntable side is coaxially aligned and fixed with the main body side centering means installed on the camcorder main body side. Further, at the time of fixing, both the main body side centering means and the turntable in the disc medium insertion lid sandwich and regulate the inner diameter side of the disk medium in the thickness direction of the disk medium, and the main body side centering means further determines the centering positioning of the disk medium. The disk is inserted into the hole, coaxially aligned in the radial direction of the disk medium, and further provided with means for directly connecting and installing the main body side centering means and the pickup unit movement positioning means, thereby providing an objective on the disk surface and the pickup unit. Relative distance between lenses XYZ both three-axis direction can guarantee constant, eliminating the risk of collision, it was also facilitate the further pick-up control.

  Furthermore, the spindle motor drive source that is directly connected to the turntable in the disc holder is installed in the disc holder, so that the spindle motor drive source radius in the configuration of a high-density optical disc camcorder with various mechanical constraints. Can be configured with a larger diameter, enabling stable rotation of the spindle motor and facilitating motor control.

  In addition, a spindle motor drive source that is directly connected to the centering means installed on the camcorder body side is installed on the camcorder body side, so that the configuration of the high-density optical disc camcorder with various mechanical constraints can be compactly summarized. Became easier.

  Furthermore, a multi-point lock on the outermost part of the disk, which is generally difficult to insert and remove by making the mechanism for fixing in the disk medium thickness direction a slide lever type at the outermost diameter of the disk medium on the turntable in the disk holder. The mechanism was easily realized.

1 is a mechanical configuration diagram (back view) of an optical disk control device according to a first embodiment. Schematic diagram (overhead view) of a camera-integrated disc camcorder equipped with the optical disc control device of the present invention Schematic (back view) of a camera-integrated disc camcorder equipped with the optical disc control device of the present invention A view of the turntable viewed from the direction (A) of FIG. 2 with the disc holder open. Disk clamper enlarged view (front view) Disk clamper enlarged view (cross-sectional view) Mechanical configuration diagram of optical disk control device according to second embodiment (back view)

Explanation of symbols

DESCRIPTION OF SYMBOLS 11 Clamper spring 12 Clamper holder 13 Disc clamper 21 Spindle motor drive coil 22 Disc holder frame 23 Slide ring 24 Slide pin 25 Turntable 31 Operation pin 41 Centering cone 42 Center hole of turntable 51 Body frame 52 Bearing 53 Fixing magnet 54 Spindle motor rotor 55 Spindle motor drive coil 56 Guide shaft holder 57 Seek guide shaft 58 Optical pickup unit 59 Seek motor 91 Disc medium

Claims (5)

In a disc camcorder comprising a camera body provided with an imaging lens, and a recording device for recording an imaging signal from the camera body on a disk medium,
In the disk holder constituting the recording apparatus, a high flatness turntable for supporting the disk medium is provided in contact with the disk medium surface with a predetermined radial width from the inner periphery to the outer periphery of the disk medium,
A disc camcorder comprising a mechanism for regulating the disc medium in the thickness direction on the basis of the outermost diameter position of the disc medium on the turntable. The disc camcorder according to claim 1, wherein centering means is provided at the rotation center of the turntable, and when the disc holder is closed, the centering means on the turntable side is connected to the main body side centering means installed on the camcorder main body side. A mechanism means for coaxial alignment and fixation;
At the time of fixing, the disk medium inner diameter side is sandwiched in the disk medium thickness direction by both the main body side centering means and the turntable in the disk medium insertion lid, and is regulated.
Further, the main body side centering means is inserted into the centering positioning hole of the disk medium, and coaxially aligns in the disk medium radial direction,
The disc camcorder further comprises means for directly connecting and installing the main body side centering means and the movement positioning means of the pickup unit.   3. The disc camcorder according to claim 1, wherein a spindle motor drive source that is directly connected to the turntable in the disc holder is installed in the disc holder.   3. The disc camcorder according to claim 1, wherein a spindle motor drive source that is directly connected to and connected to centering means installed on the camcorder body side is installed on the camcorder body side.   2. The disc camcorder according to claim 1, wherein the mechanism for fixing the disc medium in the thickness direction at the outermost diameter of the disc medium on the turntable in the disc holder is a slide lever type fixing.

Images