JP2008251105A - Guide mechanism of optical pickup and disk drive device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To reduce a manufacturing cost and to improve position accuracy of a position detecting sensor for an optical pickup. <P>SOLUTION: The optical pickup has a pair of guide shafts 10, 11 guiding an optical pickup 15 in the radius direction of a disk type recording medium, a shaft holding plate 9 attached to a base chassis having a pickup arrangement hole 3a to which the optical pickup is arranged and holding at least one side of guide shaft, a first part 16, a second part 17 folded back for the first part, and bent part 18 which is bent when the second part is folded back for the first part, and then a position detecting sensor 22 detecting a movement position of the optical pickup and a flexible printed wiring board 4 on which all electronic parts including the position detecting sensor on which the sensor 22 is mounted are mounted at one side plane are provided at the second part, and at least the second part of the flexible printed wiring board is attached to the shaft holding plate. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a technical field of an optical pickup guide mechanism and a disk drive device. More specifically, the present invention relates to a technical field for improving the positional accuracy of a position detection sensor with respect to an optical pickup by attaching a folded second portion of a flexible printed wiring board to a shaft holding plate that holds a guide shaft.

  2. Description of the Related Art An optical pickup that moves in the radial direction of a disk-shaped recording medium is provided in a disk drive device that records or reproduces an information signal to / from a disk-shaped recording medium mounted on a disk table (for example, Patent Documents). 1).

  The optical pickup is equipped with an objective lens driving device that moves the objective lens in a desired direction and a light emitting part such as a laser diode that emits laser light, and is guided by a pair of guide shafts to move in the radial direction of the disc-shaped recording medium. In this state, the light emitted from the light emitting unit is collected by the objective lens and irradiated onto the recording surface of the disk-shaped recording medium, and information signals are recorded or reproduced.

  The disk drive device requires a media detection sensor for detecting whether or not the disk-shaped recording medium is mounted on the disk table and the type of the disk-shaped recording medium, and a position detection sensor for detecting the moving position of the optical pickup. Each of these sensors is mounted on a flexible printed wiring board.

  The media detection sensor and the position detection sensor are arranged opposite to the flexible printed wiring board depending on the assembly position of each part such as an optical pickup. As a method of arranging the media detection sensor and the position detection sensor in the opposite directions as described above, the media detection sensor is mounted on one side of one flexible printed wiring board, the position detection sensor is mounted on the other side, and the double-sided board is mounted. There is a method of configuring, or a method in which a media detection sensor and a position detection sensor are separately mounted on two flexible printed wiring boards, and the flexible printed wiring boards are arranged so that the two sensors are in opposite directions.

JP 11-238329 A

  However, when a media detection sensor and a position detection sensor are mounted on both sides of one flexible printed wiring board to form a double-sided board, a process is required to mount (mount) the sensors on both sides of the flexible printed wiring board. Therefore, there is a problem that the manufacturing cost rises because the work process becomes two processes.

  In addition, when the media detection sensor and the position detection sensor are mounted on the two flexible printed wiring boards, the assembly process of the flexible printed wiring board to the base chassis is required twice, which requires time and cost for the assembly work. There is a problem of becoming high.

  On the other hand, since the position detection sensor is a sensor that detects the movement position of the optical pickup, it is necessary to improve the positional accuracy with respect to the optical pickup.

  Accordingly, an object of the optical pickup guide mechanism of the present invention is to reduce the manufacturing cost and improve the position accuracy of the position detection sensor with respect to the optical pickup.

  The guide mechanism of the optical pickup of the present invention includes a pair of guide shafts for guiding the optical pickup in the radial direction of the disk-shaped recording medium, and at least one guide shaft attached to a base chassis having a pickup placement hole in which the optical pickup is placed. A shaft holding plate for holding, a first portion, a second portion folded back with respect to the first portion, and a bent portion bent when the second portion is folded back with respect to the first portion And a flexible printed wiring board in which a position detection sensor for detecting the movement position of the optical pickup is mounted in the second portion, and all electronic components including the position detection sensor are mounted on one surface, At least a second portion of the flexible printed wiring board is attached to the shaft holding plate.

  The disk drive device of the present invention includes a base chassis having a pickup arrangement hole, and an optical pickup that is arranged in the pickup arrangement hole and is moved in the radial direction of the disk-shaped recording medium during recording and reproduction of an information signal with respect to the disk-shaped recording medium. A pair of guide shafts for guiding the optical pickup in the radial direction of the disc-shaped recording medium, a shaft holding plate attached to the base chassis and holding at least one guide shaft, a first portion, and the first portion. A second portion that is folded back and a bent portion that is bent when the second portion is folded with respect to the first portion, and the movement position of the optical pickup is detected in the second portion. A flexible printed wiring board with a position detection sensor and all electronic components including the position detection sensor mounted on one side is installed. , It is prepared by attaching at least a second portion of the flexible printed circuit board in the axial holding plate.

  Another guide mechanism for an optical pickup according to the present invention includes a pair of guide shafts for guiding the optical pickup in the radial direction of the disc-shaped recording medium, and a holding portion for holding the guide shaft having a pickup placement hole for placing the optical pickup. A provided base chassis, a first portion, a second portion folded back with respect to the first portion, and a bent portion bent when the second portion is folded back with respect to the first portion; And a flexible printed wiring board in which all the electronic components including the position detection sensor are mounted on one surface, and a flexible printed wiring board is mounted on the second portion. A printed wiring board is attached to the base chassis.

  Another disk drive apparatus of the present invention includes a base chassis having a pickup arrangement hole, and light that is arranged in the pickup arrangement hole and is moved in the radial direction of the disk-shaped recording medium during recording and reproduction of an information signal with respect to the disk-shaped recording medium. The pickup, the pair of guide shafts for guiding the optical pickup in the radial direction of the disk-shaped recording medium, the first portion, the second portion folded back with respect to the first portion, and the second portion are the first. All the electronic components including the position detection sensor are mounted with a position detection sensor for detecting the movement position of the optical pickup in the second portion. A flexible printed wiring board mounted on one surface is provided, and the flexible printed wiring board is attached to the base chassis.

  Therefore, in the optical pickup guide mechanism and the disk drive apparatus according to the present invention, the second portion on which the position detection sensor is mounted is attached to the shaft holding plate that holds the guide shaft.

  An optical pickup guiding mechanism according to the present invention is an optical pickup guiding mechanism that guides an optical pickup that is moved when an information signal is recorded or reproduced with respect to a disk-shaped recording medium in a radial direction of the disk-shaped recording medium. A pair of guide shafts for guiding the disk-shaped recording medium in the radial direction; a shaft holding plate for holding at least one guide shaft attached to a base chassis having a pickup placement hole in which an optical pickup is placed; and a first portion; A second portion that is folded with respect to the first portion; and a bent portion that is bent when the second portion is folded with respect to the first portion. A flexible sensor with a position detection sensor that detects the moving position and all electronic components including the position detection sensor are mounted on one surface. And a printed wiring board, characterized in that mounted at least a second portion of the flexible printed circuit board in the axial holding plate.

  Therefore, since the electronic component is mounted only on one surface of the flexible printed wiring board, the process of mounting the electronic component on the flexible printed wiring board is only one step, and the manufacturing cost can be reduced.

  In addition, since the second portion on which the position detection sensor for detecting the moving position of the optical pickup is mounted is attached to the shaft holding plate that holds the guide shaft that supports the optical pickup, the position detection sensor for the optical pickup. The position accuracy can be improved.

  In the invention described in claim 2, the flexible printed wiring board is attached to the base chassis and the shaft holding plate so that the first portion and the second portion do not overlap. Can be achieved.

  In the invention described in claim 3, the flexible printed wiring board is provided with a protective portion attached in a state of straddling the base chassis and the shaft holding plate, and a part of the folded second portion overlaps the protective portion. Since it did in this way, the 2nd part does not contact the edge of a shaft holding plate, and it can prevent disconnection of the wiring formed in the 2nd part.

  The disc drive apparatus according to the present invention is a disc drive apparatus for recording or reproducing information signals to / from a disc-shaped recording medium, and includes a base chassis having a pickup arrangement hole, and an information signal for the disc-shaped recording medium arranged in the pickup arrangement hole. An optical pickup moved in the radial direction of the disk-shaped recording medium during recording and reproduction, a pair of guide shafts for guiding the optical pickup in the radial direction of the disk-shaped recording medium, and at least one guide attached to the base chassis A shaft holding plate that holds the shaft, a first portion, a second portion that is folded back with respect to the first portion, and a bent portion when the second portion is folded back with respect to the first portion And a position detection sensor for detecting the moving position of the optical pickup is mounted on the second portion. And a flexible printed wiring board in which all the electronic components are mounted on one plane containing the sensor, characterized in that mounted at least a second portion of the flexible printed circuit board in the axial holding plate.

  Therefore, since the electronic component is mounted only on one surface of the flexible printed wiring board, the process of mounting the electronic component on the flexible printed wiring board is only one step, and the manufacturing cost can be reduced.

  In addition, since the second portion on which the position detection sensor for detecting the moving position of the optical pickup is mounted is attached to the shaft holding plate that holds the guide shaft that supports the optical pickup, the position detection sensor for the optical pickup. The position accuracy can be improved.

  Another guide mechanism for an optical pickup according to the present invention is a guide mechanism for an optical pickup that guides an optical pickup that is moved at the time of recording or reproducing an information signal to / from a disc-shaped recording medium in a radial direction of the disc-shaped recording medium. A pair of guide shafts for guiding the pickup in the radial direction of the disc-shaped recording medium; a base chassis having a pickup placement hole in which the optical pickup is placed and having a holding portion for holding the guide shaft; and a first portion; The optical pickup has a second part that is folded back with respect to the first part and a bent part that is bent when the second part is folded with respect to the first part, and the optical pickup moves to the second part. A position detection sensor for detecting the position is mounted, and a flexible printed wiring board is mounted with all electronic components including the position detection sensor mounted on one side. , Characterized in that fitted with the flexible printed wiring board to the base chassis.

  Therefore, since the electronic component is mounted only on one surface of the flexible printed wiring board, the process of mounting the electronic component on the flexible printed wiring board is only one step, and the manufacturing cost can be reduced.

  In addition, since the second portion on which the position detection sensor for detecting the moving position of the optical pickup is mounted is attached to the shaft holding plate that holds the guide shaft that supports the optical pickup, the position detection sensor for the optical pickup. The position accuracy can be improved.

  In the invention described in claim 6, the bent portion is connected to the portion biased in the direction perpendicular to the center portion in the direction perpendicular to the folding direction of the second portion relative to the first portion, Since the screw insertion hole for attaching the second part to the base chassis by screwing is formed in the central part in the orthogonal direction of the two parts, the screw insertion hole is a bent part in the state where the second part is folded back. The center portion of the second portion can be attached to the base chassis by screwing, and the attachment state of the second portion to the base chassis can be stabilized.

  Another disk drive apparatus according to the present invention is a disk drive apparatus for recording or reproducing information signals to / from a disk-shaped recording medium, the base chassis having a pickup arrangement hole, and the disk-shaped recording medium arranged in the pickup arrangement hole. An optical pickup moved in the radial direction of the disc-shaped recording medium during recording and reproduction of an information signal, a pair of guide shafts for guiding the optical pickup in the radial direction of the disc-shaped recording medium, a first portion, and the first portion A second portion that is folded back with respect to the first portion; a bent portion that is bent when the second portion is folded back with respect to the first portion; and the movement position of the optical pickup at the second portion. A flexible print with a position detection sensor for detection and all electronic components including the position detection sensor mounted on one side And a line board, characterized in that fitted with the flexible printed wiring board to the base chassis.

  Therefore, since the electronic component is mounted only on one surface of the flexible printed wiring board, the process of mounting the electronic component on the flexible printed wiring board is only one step, and the manufacturing cost can be reduced.

  In addition, since the second portion on which the position detection sensor for detecting the moving position of the optical pickup is mounted is attached to the shaft holding plate that holds the guide shaft that supports the optical pickup, the position detection sensor for the optical pickup. The position accuracy can be improved.

  The best mode for carrying out the present invention will be described below with reference to the accompanying drawings.

  First, the first best mode will be described (see FIGS. 1 to 5).

  The disk drive device 1 is configured by arranging required members and mechanisms inside an outer casing 2 (see FIG. 1), and a disk insertion slot (not shown) is formed in the outer casing 2. The disk drive device 1 has a configuration in which one optical pickup is arranged on the opposite side across the spindle motor, and each component related to the two optical pickups is arranged in a symmetrical position with respect to the spindle motor. .

  Examples of such an apparatus having two optical pickups include an apparatus for the purpose of speeding up a reproduction operation and a recording operation, and an apparatus in which the two optical pickups are operated corresponding to different types of disc-shaped recording media. There is.

  Inside the outer casing 2, for example, a base chassis 3 formed in a substantially rectangular shape facing the vertical direction is disposed. The base chassis 3 is formed with a pickup arrangement hole 3a on the whole except for the outer peripheral portion.

  On the base chassis 3, portions excluding a part of the flexible printed wiring boards 4 and 4 are attached to both sides of the pickup arrangement hole 3 a. Drive motors 5 and 5 are fixed to the base chassis 3, and one end portions of the flexible printed wiring boards 4 and 4 are connected to the drive motors 5 and 5. An optical pickup described later is moved in the radial direction of the disk-shaped recording medium 100 by driving the drive motors 5 and 5.

  A motor mounting plate 6 is attached to the center portion of the base chassis 3. The motor attachment plate 6 is attached to the base chassis 3 so as to separate the pickup arrangement hole 3a into two parts having substantially the same size.

  A spindle motor 7 is fixed on the motor mounting plate 6, and a disk table 8 is fixed to the motor shaft of the spindle motor 7.

  A shaft holding plate 9 is attached to the base chassis 3 along the opening edge of the pickup arrangement hole 3a. Guide shafts 10 and 10 are respectively held on the shaft holding plates 9 and 9, and the guide shafts 10 and 10 are positioned along the opening edge of the pickup arrangement hole 3a.

  In the base chassis 3, sub guide shafts 11 and 11 are arranged along the opening edge of the pickup arrangement hole 3a. The sub guide shafts 11 and 11 are arranged in parallel with the guide shafts 10 and 10, and both end portions in the axial direction are held by shaft holding members 12 and 12 attached to the base chassis 3.

  As shown in FIG. 2, the shaft holding plate 9 includes a mounted portion 13 that extends in the longitudinal direction of the base chassis 3 and a shaft holding projection that protrudes in the same direction perpendicular to both ends in the longitudinal direction of the mounted portion 13. 14 and 14. Arrangement cutouts 13a and 13a are formed in the attached portion 13 so as to be spaced apart in the longitudinal direction and opened on the side from which the shaft holding projections 14 and 14 are projected. The shaft holding projections 14 and 14 are formed with holding grooves 14a and 14a.

  The attached portion 13 of the shaft holding plate 9 is attached to the base chassis 3 by, for example, screwing along the opening edge of the pickup arrangement hole 3a. In a state where the attached portion 13 is attached to the base chassis 3, the placement notches 13a and 13a are positioned in the pickup placement hole 3a.

  Both end portions in the axial direction of the guide shaft 10 are inserted and held in the holding grooves 14a and 14a of the shaft holding plate 9, respectively. As shown in FIG. 1, a disc-shaped recording on which an optical pickup 15 is mounted on a disc table 8 is provided on the guide shaft 10 held on the shaft holding plate 9 and the sub guide shaft 11 held on the shaft holding members 12, 12. The medium 100 is supported so as to be movable in the radial direction.

  As shown in FIG. 2, the flexible printed wiring board 4 includes a first portion 16 that is long in the longitudinal direction of the base chassis 3, and a second portion 17 that is also long in the longitudinal direction of the base chassis 3. A bent portion 18 provided continuously at one end in the longitudinal direction of the second portion 17, a protective portion 19 provided on the opposite side of the second portion 17 across the bent portion 18, and the protection It consists of the connection part 20 which connects the part 19 and the 1st part 16. FIG. In the flexible printed wiring board 4, no electronic components are mounted on the protection unit 19 and no wiring is formed.

  The first portion 16 and the second portion 17 are positioned in parallel, and the connecting portion 20 is provided so as to extend in a direction orthogonal to the first portion 16 and the second portion 17.

  An electronic component is mounted on the flexible printed wiring board 4 only on one surface, for example, the upper surface 4a. Examples of the electronic component include position detection for detecting the positions of the media detection sensors 21 and 21 and the optical pickup 15 for detecting whether or not the disk-shaped recording medium 100 is mounted on the disk table 8 and the type of the disk-shaped recording medium 100. Sensors 22 and 22 are provided, the media detection sensors 21 and 21 are mounted on the first portion 16, and the position detection sensors 22 and 22 are mounted on the second portion 17.

  In the flexible printed wiring board 4, the first portion 16 is attached to the base chassis 3, the second portion 17 is bent at the bent portion 18, and overlaps the upper surface of the bent portion 18 with respect to the first portion 16. And is attached to the attached portion 13 of the shaft holding plate 9. Therefore, in a state where the first portion 16 is attached to the base chassis 3 and the second portion 17 is attached to the shaft holding plate 9, the position detection sensors 22 and 22 mounted on the second portion 17 are downward. The position detection sensors 22 and 22 are respectively inserted into the arrangement cutouts 13a and 13a of the shaft holding plate 9 from the upper side and arranged in the pickup arrangement hole 3a.

  As described above, since the first portion 16 is attached to the base chassis 3 and the second portion 17 is attached to the shaft holding plate 9, the first portion 16 and the second portion 17 are arranged so as not to overlap. Accordingly, the disk drive device 1 can be made thinner.

  In a state where the flexible printed wiring board 4 is attached to the base chassis 3 and the shaft holding plate 9, the protection unit 19 is arranged in a state straddling the base chassis 3 and the shaft holding plate 9. At this time, the second portion 17 is in a state where the end portion on the bent portion 18 side is overlapped with the protective portion 19.

  Therefore, the second portion 17 does not come into contact with the end edge 9a of the shaft holding plate 9, and disconnection of the wiring formed in the second portion 17 can be prevented.

  As described above, in the disk drive device 1, since electronic components are mounted only on the upper surface 4 a of the flexible printed wiring board 4, the electronic components are mounted (mounted) on the flexible printed wiring board 4. One process is sufficient, and the manufacturing cost can be reduced.

  In addition, since the two types of sensors, the media detection sensors 21 and 21 and the position detection sensors 22 and 22 are mounted on the same flexible printed wiring board 4, one flexible printed wiring board 4 is connected to the base chassis 3 and the shaft holding plate. 9 can be assembled, the time of the assembly work can be shortened, the number of parts can be reduced, and the manufacturing cost can be reduced.

  Further, a second portion 17 on which position detection sensors 22, 22 for detecting the movement position of the optical pickup 15 are mounted on the shaft holding plate 9 that holds the guide shaft 10 that supports the optical pickup 15. Therefore, the position accuracy of the position detection sensors 22 and 22 with respect to the optical pickup 15 is improved, and the operation reliability of the optical pickup 15 can be improved.

  Next, the second best mode will be described (see FIGS. 6 and 7).

  In the second best mode described below, the shaft holding projection for holding the guide shaft is integrally formed on the base chassis and the shaft holding plate is provided, as compared with the first best mode described above. The only difference is that there is no difference and the shape of the flexible printed wiring board and the folding method of the second part are different. Therefore, only the different parts compared to the first best mode will be described in detail, and the other parts will be described. Are denoted by the same reference numerals as those assigned to similar parts in the first best mode, and description thereof is omitted.

  The base chassis 3A is integrally provided with shaft holding projections 23, 23,... Projecting toward the pickup arrangement hole 3a, and the shaft holding projections 23, 23,. 23a,... Are formed. Both end portions in the axial direction of the guide shaft 10 are inserted and held in the holding grooves 23a and 23a of the base chassis 3A.

  Arrangement notches 3b and 3b opened on the pickup arrangement hole 3a side are formed on the base chassis 3A.

  On the base chassis 3A, flexible printed wiring boards 4A and 4A are attached to both sides of the pickup arrangement hole 3a.

  The flexible printed wiring board 4A includes a first portion 16A that is long in the longitudinal direction of the base chassis 3A, a second portion 17A that is also long in the longitudinal direction of the base chassis 3A, and a first portion 16A. It consists of a bent portion 18A connecting the second portion 17A. A screw insertion hole 17a is formed at the center in the longitudinal direction of the second portion 17A.

  The first portion 16A and the second portion 17A are positioned in parallel, and the bent portion 18A is provided so as to extend in a direction orthogonal to the first portion 16A and the second portion 17A. The bent portion 18A connects a portion near one end of the first portion 16A and a portion that is biased in the longitudinal direction from the central portion in the longitudinal direction of the second portion 17A.

  On the flexible printed wiring board 4A, electronic components are mounted only on one surface, for example, the upper surface 4a. Media detection sensors 21 and 21 provided as electronic components are mounted on the first portion 16A, and position detection sensors 22 and 22 are mounted on the second portion 17A.

  In the state where the first portion 16A is attached to the base chassis 3, the flexible printed wiring board 4A is folded at the bent portion 18A and folded back with respect to the first portion 16A. The second portion 17A is folded back in a direction overlapping the lower surface of the bent portion 18A. The folded second portion 17A is attached to the base chassis 3A by inserting a mounting screw (not shown) into the screw insertion hole 17a.

  In a state where the flexible printed wiring board 4A is attached to the base chassis 3A, the position detection sensors 22 and 22 mounted on the second portion 17A are arranged in the arrangement notch 3b in a state of facing downward.

  As described above, in the disk drive device 1, since the electronic component is mounted only on the upper surface 4a of the flexible printed wiring board 4A, the electronic component is mounted (mounted) on the flexible printed wiring board 4A. One process is sufficient, and the manufacturing cost can be reduced.

  Since the two types of sensors, the media detection sensors 21 and 21 and the position detection sensors 22 and 22 are mounted on the same flexible printed wiring board 4A, one flexible printed wiring board 4A is assembled to the base chassis 3A. As a result, the time required for assembly can be shortened, the number of parts can be reduced, and the manufacturing cost can be reduced.

  Further, the second portion 17A on which the position detection sensors 22 and 22 for detecting the moving position of the optical pickup 15 are mounted is attached to the base chassis 3 that holds the guide shaft 10 that supports the optical pickup 15. The positional accuracy of the position detection sensors 22 and 22 with respect to the optical pickup 15 is improved, and the operation reliability of the optical pickup 15 can be improved.

  In addition, in the flexible printed wiring board 4A, since the bent portion 18A is connected to a portion that is biased in the longitudinal direction from the center portion in the longitudinal direction of the second portion 17A, the second portion 17A is The screw insertion hole 17a formed in the central portion in the longitudinal direction in the folded state does not overlap the bent portion 18A, and the central portion in the longitudinal direction of the second portion 17A can be attached to the base chassis 3 by screwing. It is possible to stabilize the attachment state of the second portion 17A to the base chassis 3.

  Although an example in which two optical pickups 15 and 15 are provided has been described above, the scope of application of the present invention is not limited to an apparatus having two optical pickups 15 and 15, The present invention can also be applied to an apparatus provided with three or more optical pickups.

  The specific shapes and structures of the respective parts shown in the above-described best mode are merely examples of the implementation of the present invention, and the technical scope of the present invention is limited by these. It should not be interpreted in a general way.

FIG. 2 to FIG. 5 show a first best mode of the present invention, which is a schematic perspective view of a disk drive device. It is an expansion disassembled perspective view which shows a base chassis, a shaft holding plate, and a flexible printed wiring board. It is a perspective view which shows the state before the 2nd part of a flexible printed wiring board is attached to a shaft holding board. It is a perspective view which shows the state in which the 2nd part of the flexible printed wiring board was folded and attached to the shaft holding board. It is an expanded sectional view showing the state where the 2nd portion was piled up on the protection part, and the 2nd portion was attached to the axis maintenance board. The 2nd best form of this invention is shown with FIG. 7, This figure is an expansion perspective view which shows the state before a 2nd part is return | folded. It is an expansion perspective view which shows the state in which the 2nd part was return | folded and attached to the base chassis.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Disk drive apparatus, 3 ... Base chassis, 3a ... Pick-up arrangement | positioning hole, 4 ... Flexible printed wiring board, 4a ... Upper surface (one surface), 9 ... Shaft holding plate, 10 ... Guide shaft, 11 ... Sub guide shaft, DESCRIPTION OF SYMBOLS 12 ... Shaft holding member, 15 ... Optical pick-up, 16 ... 1st part, 17 ... 2nd part, 18 ... Bending part, 19 ... Protection part, 22 ... Position detection sensor, 3A ... Base chassis, 4A ... Flexible printing Wiring board, 16A ... first part, 17A ... second part, 17a ... screw insertion hole, 18A ... bent part, 100 ... disc-shaped recording medium

Claims (7)

An optical pickup guide mechanism for guiding an optical pickup moved during recording or reproduction of an information signal with respect to a disk-shaped recording medium in a radial direction of the disk-shaped recording medium,
A pair of guide shafts for guiding the optical pickup in the radial direction of the disc-shaped recording medium;
A shaft holding plate that is attached to a base chassis having a pickup placement hole in which an optical pickup is placed and holds at least one guide shaft;
A first portion, a second portion that is folded with respect to the first portion, a bent portion that is bent when the second portion is folded with respect to the first portion, and a second portion A position detection sensor for detecting the movement position of the optical pickup is mounted on the part, and a flexible printed wiring board on which all electronic components including the position detection sensor are mounted on one surface,
A guide mechanism for an optical pickup, wherein at least a second part of the flexible printed wiring board is attached to the shaft holding plate. The guide mechanism for an optical pickup according to claim 1, wherein the flexible printed wiring board is attached in a state where the first portion and the second portion do not overlap the base chassis and the shaft holding plate. A protective part that can be attached to the flexible printed wiring board in a state of straddling the base chassis and the shaft holding plate is provided.
The guide mechanism for an optical pickup according to claim 1, wherein a part of the folded second portion overlaps the protection portion. A disk drive device for recording or reproducing information signals on a disk-shaped recording medium,
A base chassis having a pickup arrangement hole;
An optical pickup which is arranged in the pickup arrangement hole and is moved in the radial direction of the disc-shaped recording medium at the time of recording and reproducing information signals with respect to the disc-shaped recording medium;
A pair of guide shafts for guiding the optical pickup in the radial direction of the disc-shaped recording medium;
A shaft holding plate that is attached to the base chassis and holds at least one guide shaft;
A first portion, a second portion that is folded with respect to the first portion, a bent portion that is bent when the second portion is folded with respect to the first portion, and a second portion A position detection sensor for detecting the movement position of the optical pickup is mounted on the part, and a flexible printed wiring board on which all electronic components including the position detection sensor are mounted on one surface,
A disk drive device characterized in that at least a second portion of the flexible printed wiring board is attached to the shaft holding plate. An optical pickup guide mechanism for guiding an optical pickup moved during recording or reproduction of an information signal with respect to a disk-shaped recording medium in a radial direction of the disk-shaped recording medium,
A pair of guide shafts for guiding the optical pickup in the radial direction of the disc-shaped recording medium;
A base chassis having a pickup placement hole in which an optical pickup is placed and having a holding portion for holding a guide shaft;
The second part has a first part, a second part folded back with respect to the first part, and a bent part bent when the second part is folded back with respect to the first part. A position detection sensor for detecting the movement position of the optical pickup is mounted, and a flexible printed wiring board on which all electronic components including the position detection sensor are mounted on one surface,
A guide mechanism for an optical pickup, characterized in that a flexible printed wiring board is attached to the base chassis. Connecting the bent portion to the portion biased in the direction perpendicular to the central portion in the direction perpendicular to the folding direction of the second portion relative to the first portion;
6. The guide mechanism for an optical pickup according to claim 5, wherein a screw insertion hole for attaching the second portion to the base chassis by screwing is formed in a central portion of the second portion in the orthogonal direction. A disk drive device for recording or reproducing information signals on a disk-shaped recording medium,
A base chassis having a pickup arrangement hole;
An optical pickup which is arranged in the pickup arrangement hole and is moved in the radial direction of the disc-shaped recording medium at the time of recording and reproducing information signals with respect to the disc-shaped recording medium;
A pair of guide shafts for guiding the optical pickup in the radial direction of the disc-shaped recording medium;
The second part has a first part, a second part folded back with respect to the first part, and a bent part bent when the second part is folded back with respect to the first part. A position detection sensor for detecting the movement position of the optical pickup is mounted, and a flexible printed wiring board on which all electronic components including the position detection sensor are mounted on one surface,
A disk drive device characterized in that a flexible printed wiring board is attached to the base chassis.

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