JPH07320276A - Optical disk device - Google Patents

Abstract

PURPOSE:To obtain a small and reliable optical disk recording/reproducing device provided with excellent performance at a low cost by reducing the material and man-hour for the assemblage with a simple structure having a small number of components and also increasing stability of the operation. CONSTITUTION:An optical pickup moving means 4 is engaged with a groove part 23 provided on one surface of a guide rail means 5 and positionally controlled, and further a driving gear 21 is engaged with a tooth form part 12 provided on one surface of a confronted guide rail means 5 to transmit the driving force. By means of integrally constituting the groove part 23 and the tooth form part 12 on the guide rail means, the number of components of the optical disk device is reduced, and also the improvement of reliability and the reduction of the cost are attained.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical disk device for recording / reproducing a disk-shaped recording medium.

[0002]

2. Description of the Related Art In recent years, optical disk devices have been required to achieve performance with a more simplified structure in order to reduce costs.

A conventional optical disk device will be described below. FIG. 15 is a perspective view of a conventional optical disk device.
In FIG. 15, reference numeral 61 is an optical disk. A spindle motor 62 rotates the optical disk 61. Reference numeral 63 denotes an optical pickup means for detecting information on the optical disc 61, which is a first optical disc 61 for the first surface of the optical disc 61.
The guide shaft 64 and the second guide shaft 65 with respect to the second surface of the optical disk 61 are linearly moved. 66
Is an optical pickup means 63 and two guide shafts 64, 65
Is a guide base member that holds the. 67
The optical pickup means 63 to the first guide shaft 64, the second
It is an optical pickup reversing means for transporting between the guide shafts 65. 68 is a power transmission means for transmitting power (not shown) from the outside to the optical pickup means 63.

The operation of the optical disk device configured as described above will be described. As is well known, first, the optical disk 61 is rotated by the spindle motor 62, and the information recorded on the optical disk 61 is reproduced by the optical pickup means 63. At this time, the optical pickup means 63 is moved by the power transmitted from the outside by the power transmission member 68, and is precisely regulated in position by the two guide shafts 64 and 65 that make the optical pickup 61 movable only in the radial direction. To be done. When reversing from the first surface to the second surface on the optical disc 61 for reproduction, the optical pickup reversing unit 67 moves the optical pickup unit 63 to a position outside the outermost periphery of the optical disc 61.

[0005]

However, in the above-mentioned conventional structure, the optical pickup means 63 needs to be precisely fitted to the first and second guide shafts 64 and 65, and the engaging portion thereof has precision. Requires. In addition, a first guide shaft 64 for the first surface for guiding and a second guide shaft for the second surface are provided.
2 of the guide shafts 65 are required, and each of them needs to be accurately engaged with the guide base member 66.
Strict assembly accuracy leads to higher costs.

Further, when the optical pickup means 63 reverses and reproduces from the first surface to the second surface of the optical disk 61, the optical pickup reversing means 67 is required, and the mechanism becomes complicated. The optical pickup means 6 is provided between the first guide shaft 64 and the second guide shaft 65.
There is also a surface that lacks stability when the third guide shaft 64 is disengaged from the first guide shaft 64 and is fitted again to the second guide shaft 65. In addition, the optical pickup means 63 includes the first and second guide shafts 6.
Since the optical pickup means 63 can be inverted at a position away from the fitting of Nos. 4 and 65, the optical pickup means 63 is inverted at a position far from the outer circumference of the optical disc 61, which causes a problem that the depth of the entire mechanism becomes large. It was

The present invention solves the above-mentioned problems of the prior art by reducing the number of parts and the number of assembling steps with a simple structure having a small number of parts, and improving the stability of operation.
It is an object of the present invention to provide a low-priced and highly reliable small-sized optical disk device.

[0008]

In order to achieve this object, the present invention provides an optical pickup means for recording information on a disc-shaped recording medium or reproducing the recorded information, and rotating the disc-shaped recording medium. Disk rotation driving means, optical pickup moving means for moving the optical pickup means in the radial direction of the disk-shaped recording medium, and movement of the optical pickup means between the inner circumference and the outer circumference of the disk-shaped recording medium. Guide rail means for guiding the
An optical disk device comprising guide means for holding the guide rail means, wherein the guide rail means engages with the optical pickup moving means, and the engaging portion has a groove shape, and the surface facing the groove has a tooth shape. The optical pick moving means is provided with a driving means for engaging with the toothed portion.

Further, a double-sided reproduction type optical disc which is constituted by a pick urging means for pressingly sliding the optical pickup moving means on the guide means and reproducing information recorded on both the first surface and the second surface of the optical disk. In the device, the guide rail means has a U-shape connected so as to face the first surface to the second surface, and a groove portion is formed on the outer peripheral surface side of the U-shape and a tooth shape portion is formed on the inner peripheral surface side. Have

Further, there is a tilt drive means for rotating the guide means about the tilt fulcrum, and the tilt drive means is narrow between the substrate on which the disk rotation drive means is mounted and the guide means and the substrate. The tilt drive member is arranged so as to hold it, and a power transmission means for transmitting power to the tilt drive member.

[0011]

With this structure, the guide groove provided in the guide rail means restricts the movement of the optical pickup means in the radial direction of the optical disk, and the optical pickup moving means engages with the toothed portion also provided in the guide rail means. By transmitting the power of the drive motor of 1 through the drive gear, the optical pickup moving means can slide along the guide rail means. Also, the guide rail means is U
Since it has a V shape, the optical pickup moving means can slide more accurately. Therefore, with a simple structure, it is possible to provide accurate and stable operation and to downsize the device.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a perspective view of essential parts in a first embodiment of an optical disk reproducing apparatus. In FIG. 1, 1 is an optical disk, 2 is a spindle motor for rotating the optical disk at a controlled number of revolutions, 3 is an optical pickup means, and the above is the same as the conventional example. Reference numeral 4 is an optical pickup moving means for moving the optical pickup means 3 by rotation of a drive motor, 5 is a guide rail means with which the optical pickup moving means 4 is engaged, 7 is a guide rail means 5, and guide rail means of the optical pickup means 4. Guide means for holding the side opposite to the side engaged with 5, 9 is a spring member for giving a force for holding the guide rail means 5 by the optical pickup moving means 4, and 10 is a relative between the optical disk 1 and the optical pickup means 3. Tilt driving means for rotating the guide means 7 so that the position is optimum, 11 is a substrate on which the spindle motor 2 which is a disk rotating means is mounted, and 12 is a toothed portion provided on the guide rail means 5. Reference numeral 13 is an electric circuit section for processing the signal of the optical pickup means and for driving and controlling the optical pickup moving means 4, which is connected from the output side connector 25 on the optical pickup moving means 4 side to the input side connector 26 on the electric circuit section 13. Electrical connection is made by the bent strip-shaped wire rod 14. Reference numeral 15 is a tilt drive gear rotated by a tilt drive motor 17, and 16 is a cam member for converting the rotation of the tilt drive gear 15 into vertical movement. The substrate 11 is opposite to the cam member 16 with the rotation center of the optical disc 1 interposed therebetween. The guide means 7 is mounted on the tilt fulcrum 32 and the cam member 16 provided above, and the guide means 7 is moved up and down around the tilt fulcrum 32 (tilt driving will be described in detail in the third embodiment).

The operation of the first embodiment of the present invention will be described below. In FIG. 1, the optical pickup moving means 4 for transferring the optical pickup means 3 is a guide rail means 5.
Is engaged with. 2A and 2B are detailed views of the above-mentioned engaging portion. As shown in FIG. 2, a groove portion 23 is provided on one surface of the guide rail means 5, and a semicircular sliding member 24 of the optical pickup moving means 4 is engaged with the groove surface 23. A toothed portion 12 is provided on the drive gear 2 that is rotated by a drive motor 20 that gives a driving force for moving the optical pickup moving means 4.
1 is engaged. In addition, the sliding member 22 and the drive gear 21
Is press-engaged with the guide rail means 5 by the biasing means 24. Thereby, the optical pickup moving means 4 is
Sliding member 22 engaged with groove 23 of guide rail means 5
By this, the position is regulated in the groove direction of the guide rail means 5, and the drive gear 21 can transmit the driving force to the toothed portion 12 of the guide rail means 5. That is, by integrally providing the toothed portion 12 and the groove portion 23 on the guide rail means 5 of the present invention, the optical pickup moving means 4 is accurately regulated in the sliding position, and the power of the optical pickup moving means 4 is stably controlled. Communication is possible. Further, it goes without saying that by integrally forming the tooth portion 12 for drive transmission and the groove portion 23 for position regulation, the number of parts of the optical disk device is reduced, and the number of assembling steps and the material cost are reduced.

Next, the guide rail means 5 and the drive gear 21
The engagement will be described with reference to FIGS. 3 (a) and 3 (b). Figure 3
FIG. 6 is an explanatory diagram of engagement between the guide rail means 5 and the drive gear 21. Normally, when the tooth profile 27 of the drive gear 21 and the tooth profile 12 of the guide rail means 5 are pressure-engaged with each other, it is difficult for the tooth profiles 12, 27 to deeply mesh with each other to perform a smooth rotation operation. Therefore, a flat surface portion 29 is provided on the guide rail means 5 and a cylindrical portion 28 is provided on the drive gear 21.
As shown in the sectional view of (b), the tooth profile 12 of the guide rail means 5 and the tooth profile 27 of the drive gear 21 are designed to have a contact point 30 at a position having a suitable mesh. As a result, the drive gear 21 can be smoothly rotated on the guide rail means 5, and unnecessary vibration of the optical pickup means 3 which deteriorates the reproduction state of the optical disk 1 can be prevented and an excellent optical disk device can be provided. Is provided.

Next, the operation of the wire 14 for transmitting the signal from the optical pickup means 3 will be described. In FIG. 1, the strip-shaped wire rod 14 output from the output side connector 25 of the optical pickup moving means 4 located further outside the guide rail means 5 provided on the side surface of the guide means 7 for the signal of the optical pickup means 3 is used. The direction is changed by the bending in the longitudinal direction, and the electric circuit portion 13 enters the inlet side connector 26. As a result, even when the optical pickup moving means 4 moves along the guide rail means 5, the wire rod 14 is flexed so that the connection is achieved without stress. That is, the wire 14 is extended from the outer surface of the guide means 7 along the linear movement direction of the optical pickup moving means 4, so that the signal is transmitted onto the guide means 7 without being affected by the shape of the guide means 7. Guide means 7 by providing a hole or the like for passing a wire rod
Can be performed without deteriorating the strength of the wire and complicating the shape, and without processing the shape of the wire 14.
This improves the reliability of the device and facilitates connection by the wire rod 14 during assembly.

Next, the position detection of the optical pickup moving means 4 will be described with reference to FIG. FIG. 5 is a side view of the switch member and the switch engaging portion. As shown in the figure, the optical pickup moving means 4 engages and moves on the guide rail means 5, but is stopped at a prescribed position of the optical disk 1 or self-timed. It is necessary to judge the position of. In the present invention, the switch member 34 is arranged on the optical pickup moving means 4, and the switch engaging portion 35 with the switch member 34 is provided on the guide rail means 5, so that the optical pickup moving on the guide rail means 5 is moved. When the switch member 34 of the means 4 detects the switch engaging portion 35, the signal of the switch member 34 is sent to the electric circuit portion 13 via the wire 14.

As described above, since the switch member 34 for detecting the position is provided on the optical pickup moving means 4,
It can be supplied by the wire 14 together with other signals, and since the switch engaging portion 35 with the switch member 34 is integrated with the guide rail means 5, it is not necessary to install a special engaging portion. Therefore, it is possible to reduce the cost and the assembly man-hour by reducing the number of parts.

A second embodiment of the present invention will be described below with reference to the drawings. FIG. 6 is a perspective view of a double-sided reproduction optical disk device showing a second embodiment of the present invention. In FIG. 6, reference numeral 2 is a spindle motor for rotationally driving an optical disk (not shown), 3 is an optical pickup means, and 10 is a tilt drive means. The above is the same as the configuration of the first embodiment shown in FIG. Reference numeral 6 is a U-shaped guide rail means connected from the first surface to the second surface of the optical disk, and 8 is a guide means for holding the guide rail means 6 and the optical pickup driving means 4. Reference numeral 19 is a position restricting means for restricting the position of the guide rail means 6 on the second surface and adjusting and moving it relative to the guide means 8. Reference numeral 50 denotes a pick urging means, which is provided on the opposite side of the optical pickup moving means 4 from the side engaging with the guide rail means 6 and presses against the guide means 8. The present invention enables the optical pickup means 3 to be transferred from the first surface to the second surface of the optical disc, and has a suitable configuration.

The operation of the double-sided reproduction optical disk device configured as described above will be described below. The optical pickup moving means 4 equipped with the optical pickup means 3 is U
It engages with the guide rail means 6 in the shape of a letter and can be moved along the guide rail means from the first surface to the second surface of the optical disk. Further, the position of the guide rail means 6 is adjusted by the position regulating means 19 on the second surface of the optical pickup moving means 4 so that the information reading state becomes optimum in the concentric direction of the optical disk.

Next, the features of the reversing mechanism for double-sided reproduction will be described with reference to FIG. 7 by comparing the second embodiment of the present invention with the conventional example. FIG. 7A is an operation explanatory view of the guide rail means in the second embodiment of the present invention, and FIG. 7B is an operation explanatory view of the guide means in the conventional example. In FIG. 7A, 1 is an optical disk, 4 is an optical disk moving means, 22
Is a sliding member provided in the optical disk drive means.
Now, the outermost circumference of the optical disc 1 is being reproduced, and at this time, the sliding member 22 is engaged with the linear portion of the guide rail means 6 with the length L. After that, in the case of moving in the direction of the arrow y in the drawing and reversing to the second surface of the optical disc 1, reversing becomes possible at the time of moving a distance of L / 2. Next, referring to FIG. 7B, the reversing movement in the case of using the first and second guide shafts 36 and 37 in the conventional example will be described. When the optical pickup moving means 4 having the fitting portion 38 having the length L moves in the direction of the arrow y in the figure, it is obvious that the reversing operation cannot be started unless the optical pickup moving means 4 moves more than the distance L currently fitted. . That is, FIG.
The U-shaped guide rail means having the groove 23 in the outer peripheral portion shown in FIG. 7A is compared with the guide structure using the first and second guide shafts 36 and 37 of FIG. With respect to the length of L / 2, the guide means can be shortened, which makes it possible to reduce the weight of the movable portion and reduce the tilt driving force to realize smooth operation. Further, the device can be downsized.

Next, the operation of the support for controlling the sagging of the wire 14 will be described with reference to FIG. FIG. 8 is a diagram for explaining the operation of the support. In FIG. 8, reference numeral 39 is formed integrally with the optical pickup moving means 4 in order to regulate the position of the wire 14 connected to the output side connector 25 so as to be substantially horizontal when the optical pickup moving means 4 is on the upper side of the optical disk. It is a support. When the optical pickup moving means 4 is provided on the second surface of the optical disc 1, the wire 14 for transmitting a signal from the optical pickup moving means 4 to the electric circuit section 13 has a length that allows the optical pickup moving means 4 to move to the innermost circumference. Since the wire rod 14 has a height, the wire rod 14 sags as the optical pickup moving means 4 moves to the outer periphery, and the wire rod 14 may drip and come into contact with the optical disc 1. At this time,
By providing the support 39 on the optical pickup moving means 4, it is possible to regulate the hanging portion of the wire 14 and prevent the wire 14 from coming into contact with the optical disc 1. Thus, it is possible to stably and inexpensively transmit signals with a simple configuration.

Next, the operation of the position regulating means 19 will be described with reference to FIG. FIG. 9 is a perspective view for explaining the operation of the position regulating means. In FIG. 9, the guide rail means 6 needs to be position-adjusted on the second surface of the optical disc 1 by the position regulating means 19 so that the optical disc moving means 4 can read information optimally in the concentric direction of the optical disc 1. Therefore, therefore, the guide rail means 6 has the guide means 8
Must be movably engaged with respect to. The position regulating means 19 engages with the projection 43 provided on the guide rail means 6 through the holes 44 that form a line, and the groove portion of the guide rail means 6 is made straight. Further, by installing the position regulating means 19 and the guide rail means 6 between the height regulating portion 42 provided on the guide means 8 and the flat surface portion 45 of the guide means 8, it is provided on the position regulating means 19. By the action of the pressing portion 41, the guide rail means 6 is press-engaged with the guide means 8. Further, the position regulating means 1
9 has a fulcrum of adjustment movement, and the position regulating means 19 and the guide means 8 are urged to a certain position by the urging portion 46 in a state of being engaged via an adjusting member 40 which makes the adjustment movement by rotating. Is configured to be retained.

Thus, the guide rail means 6 is regulated, pressed and adjusted and moved by one member, ie, the position regulating means 19, so that the number of parts can be reduced, and the material cost and the assembling man-hour can be reduced. The present invention provides a cost-effective optical disk device.

Next, the operation of the three protrusions provided on the sliding member 22 of the optical pickup moving means 4 will be described with reference to FIG. FIG. 10 is an explanatory view of the action of the sliding member 22. FIG. 10A shows a state in which the optical pickup moving means 4 is moving along the linear portion of the guide rail means 6, and 48 is a both-end projection for pressingly engaging the groove portion of the guide rail means 6 at both ends of the sliding member 22. Numeral 49 is a central projection portion which is pressed and engaged with the groove portion of the guide rail means 6 at the substantially central portion of the sliding member 22 so as to correspond to the position of the drive gear 21, and its height is higher than that of the both end projection portions 48. Low. Assuming that FIG.
In the case of the linear sliding member 57 in which the protrusions of the sliding member 22 are integrally formed at the same height as shown in FIG. 5, the guide rail means 6 sandwiched between the drive gear 21 and the sliding member 22 has a point load. Since it slightly bends from the contacting portion of the drive gear, the non-engaging portions 58 are not engaged with the groove portions of the guide rail means 6 at both ends of the sliding member 22, and the optical pickup is stably moved. It becomes difficult to move the means. As a result, in this embodiment, as shown in FIG. 10 (a), when the guide rail means 6 is engaged with the linear portion, both end projections 48 of the sliding member 22 are engaged with the guide rail means 6. By doing so, even if the guide rail means 6 is slightly bent, it does not affect the engagement of both ends of the sliding member 22. Further, as shown in FIG. 10B, in the arc portion of the guide rail means 6 in which the optical pickup moving means 4 reversely moves, the central projection 49 of the sliding member 22 provided opposite to the drive gear 21 is guided. Although it engages with the rail means 6, at this time, since the central protrusion 49 is lower than the other end protrusions 48, the elastic member 9 has a smaller pressing force. Therefore, when the optical pickup moving means 4 vertically moves, the reverse movement that requires a driving force is
The operation load can be reduced. As described above, the optical pickup moving means 4 is engaged with the guide rail means 6 in a suitable state to enable stable transfer and provide a highly reliable optical disk device.

Next, the operation of the pick urging means 50 for urging the optical pickup moving means 4 provided on the side facing the guide rail means 6 will be described with reference to FIG.
The optical pickup moving means 4 on the side facing the guide rail means 6 is always pressed downward with respect to the guide means 8 so as to be able to move stably against disturbance such as vibration. Therefore, the optical pickup moving means 4 needs to be biased downward. As shown in FIG. 11 (a),
The pick urging means 50 is provided on the optical pickup moving means 4 so that when the optical pickup moving means 4 is on the first surface of the optical disc 1, the sliding surface 51 of the guide means 8 is provided.
By pressing, the optical pickup moving means 4 is biased downward. Further, when the optical pickup moving means 4 is on the second surface of the optical disk 1, the sliding surface 52 of the guide means 8 is pressed to perform the above-mentioned function. At this time, the sliding surfaces 51 and 52 on the optical pickup moving means 4 with which the pick urging means 50 engages are provided with a discontinuous portion at a certain position so that the pick urging means 50 easily switches the sliding surfaces. It will be possible. Although the separating part 53 of the sliding surface as shown in FIG. 11B is required, when the separating part is provided in the horizontal moving part where the optical pickup means 3 is in a state of reproducing the information of the optical disc 1, the sliding part 53 is provided. Since some vibration is generated when the moving surface is switched, it can be easily imagined that the information reading of the optical pickup means 3 is adversely affected. Therefore, in the present invention, the reversing unit 54 (FIG. 11) which is provided while the separating unit 53 for switching the sliding surface is being moved from the first surface to the second surface of the optical disc in which the optical pickup unit 3 does not perform the information reading operation. It is characterized in that it is performed in the hatched portion shown in (a). With the above-described structure and operation, the optical pickup moving means 4 is stably and surely engaged with the guide means 8 to provide a highly reliable optical disk device.

Next, the operation of the regulating portion 55 of the guide means 8 for regulating the movement locus of the optical pickup moving means 4 will be described with reference to FIG.
Will be explained. The operation of the pick biasing means 50 of the optical pickup moving means 4 for switching the sliding surfaces 51 and 52 has been described above. Now, assuming that the pick biasing means 50 of the optical pickup moving means 4 is near the sliding surface separating portion 53 for switching the sliding surfaces 51 and 52, the optical pickup moving means 4 at the reversing portion is shown in FIG. In the engagement with the guide rail means 6 shown, the posture regulating force of the optical pickup moving means 4 decreases in the groove direction of the guide rail means 6. Therefore, the position of the pick biasing means 50 may become unstable, and the biasing means 50 may not be accurately guided to the separating portion 53. In the present invention, the pick urging means 50 provided on the optical pickup moving means 4 is surely passed through the separating portion 53 of the sliding surfaces 51 and 52.
Reference numeral 55 is a regulating portion provided on the guide means 8 facing the separating portion 53, and the optical pickup moving means 4 is a separating portion 5 having a sliding surface.
When the optical pickup moving means 4 reaches 3, the upper portion of the optical pickup moving means 4 contacts the regulating portion 55, whereby the movement of the optical pickup moving means 4 is regulated and the pick urging means 5 is provided.
0 is forcibly guided to the separation unit 53. With the above effects, the optical pickup moving means 4 can be stably operated, and a highly reliable optical disc device is provided.

Next, the small projections 5 provided on the guide rail means 6 for restricting the movement locus of the optical pickup moving means 4.
The operation of No. 6 will be described with reference to FIG. As described in detail in FIG. 10, the sliding member 2 of the optical pickup moving means 4
When the optical pickup moving means 4 of the guide rail means 6 engages with the groove portion 23 of the circular arc portion which passes during the reverse movement and slides, the sliding member 22 abuts on the groove portion 23 at the central projection portion 49. However, by restricting the posture of the optical pickup moving means 4 at the arc portion of the guide rail means 6 in comparison with the regulation at the horizontal portion of the guide rail means 6, the load during reversing movement is reduced. However,
By reducing the regulation, the optical pickup moving means 4
When the sliding member 22 moves from the circular arc portion of the guide rail means 6 to the horizontal portion, the sliding member 22 deviates from the center line of the groove portion 23 of the guide rail means 6 and hits the side surface of the groove portion 23, causing unnecessary vibration to the optical pickup means 3. May give. In the present embodiment, a small projection 56 is provided at a position where the arc portion of the guide rail means 6 shifts to a horizontal portion, and the sliding member 22 is configured to be guided to the center of the groove portion 23 of the guide rail means 6. Characterize. This reduces the load when the optical pickup moving means 4 moves in the reverse direction,
It is possible to achieve both elimination of unnecessary vibration applied to the optical pickup means 3 at the moment when the arcuate portion of the guide rail means 6 shifts to the horizontal portion at the end of the reverse movement by the small projection 56.

Since the constituent elements of the second embodiment of the present invention follow the features and operations of the constituent elements of the first embodiment, the characteristics described in the first embodiment are It goes without saying that it may be a feature of the second embodiment.

The third embodiment of the present invention will be described below with reference to the drawings. Next, the operation of the tilt driving means 10 will be described with reference to FIG. In the optical disk device, a mechanism is used in which the guide means 7 rotates with a tilt fulcrum 32 so as to keep the angle between the optical pickup means 3 and the optical disk 1 constant in response to the warp of the optical disk 1. At this time, the drive cam member of the tilt drive means 10 that gives power for rotating the guide means 7 is formed on the substrate on which the guide means 7 is mounted, so that the positional relationship accuracy is maintained. In the present invention, the substrate 11 on which the guide means 7 is mounted
The tilt driving means 10 and the tilt driving means 10 are formed on separate substrates, and the engagement thereof is performed by the power transmission means 15. A cam member 16 is formed on the power transmission means 15, and when the power transmission means 15 rotates, vertical power is transmitted via the sliding member 31 on the guide means, and the guide means 7 is a tilt fulcrum. Move up and down around 32. At this time, the tilt driving member 15 is sandwiched between the sliding member 31 and the substrate 11 by the elastic member 18, and even when the horizontal positional relationship between the tilt driving means 10 and the substrate 11 is moved, the sliding member 31 is not moved. The tilt drive can be performed within a range that does not come off from the cam member 16 provided on the tilt drive member 15. Further, the tilt driving member 15 is configured such that the length of the shaft 33 is larger than the fitting length of the tilt driving member 15 so that the tilt driving member 15 can move in the vertical direction when fitted with the shaft 33 that is the center of rotation. By doing so, even when the tilt driving means 10 and the substrate 11 are displaced from each other in height, the change in height of the cam member is transmitted without being affected by the displacement. Therefore, even when the board on which the guide means is mounted and the tilt driving means are separately configured, they can be engaged with each other with a high degree of freedom in their positional relationship, and each of them is designed separately for optimum assembly. It enables a configuration that brings about.

The tilt drive means 10 is the optical disc 1
It is also possible to have a mechanism for carrying in and out.

Next, the tilt drive member of the double-sided reproduction optical disk device will be described with reference to FIGS. 14 (a) and 14 (b). In FIG. 14A, 10 is a tilt driving means, and 1 is
Reference numeral 5 is a tilt driving member that rotates by receiving the power of the tilt driving motor 17, and 60 is a guide means of the double-sided reproduction type optical disk device. Normally, a double-sided reproduction type optical disk device also uses a tilt drive member having one cam curve similar to that of the single-sided reproduction type optical disk device, but the guide means for moving the optical pickup moving means is the first optical disk.
It was difficult to optimize the tilt angle when the straight line portion that guides the surface of No. 2 and the straight line portion that guides the second surface were not parallel. The present invention is to solve the above-mentioned problems, and in a double-sided reproduction type optical disc apparatus, a guide means for performing a tilting action corresponding to the warp of the optical disc is provided with a tilt angle corresponding to the first surface of the optical disc and a second tilt angle. The tilt angles corresponding to the planes are set to unique angles. As shown in FIG. 14A, in the tilt driving means 10, the power of the tilt driving motor 17 is transmitted to the tilt driving member 15 and the tilt driving member 15 rotates. As a result, the guide means 60 engaged with the cam member 16 on the tilt driving member 15 performs the tilting operation when the sliding member 31 is vertically displaced. Now, FIG.
A displacement 5 of the height of the cam member for tilting the guide means 60 corresponding to the first surface of the optical disc as shown in FIG.
9a and the displacement 59b of the height of the cam member for tilting corresponding to the second surface of the optical disc are continuously formed on the same cam member 16. As a result, when the tilt driving member 15 is rotated so that the sliding member 31 of the guide means 60 can be engaged only within the required range of the cam member, the first optical disc is rotated.
The tilt angles corresponding to the first surface and the second surface are provided. Therefore, according to the present invention, it is possible to provide an optical disk device having stable performance that brings about a suitable reproduction state even when the straight line portion for guiding the first surface and the straight line portion for guiding the second surface are not parallel by the guide means 60. To do.

Although the tilt fulcrum 32 is provided on the substrate 11 in the present embodiment, it goes without saying that the same effect can be obtained by providing it on the fixing portion of the spindle motor 2 fixed to the substrate 11. Further, the position at which the tilt fulcrum 32 is provided may be provided between the rotation center of the optical disc 1 and the cam member 16.

[0034]

As described above, according to the present invention, the optical pickup moving means is provided along the guide rail means by the groove portion and the tooth shape portion which are integrally formed with the guide rail means on the opposing surfaces of the guide rail means. By slidably moving the optical disk device, it is possible to realize an optical disk device which is advantageous in terms of cost with a simple configuration, has high reliability due to high stability and accuracy of operation, and can be downsized. .

[Brief description of drawings]

FIG. 1 is a perspective view of an optical disk device according to a first embodiment of the present invention.

FIG. 2A is a front view of a drive unit of the optical pickup moving means according to the first embodiment of the present invention, and FIG. 2B is a view explaining the engagement with the guide rail means.

FIG. 3A is a diagram for explaining the engagement between the guide rail means and the drive gear in the first embodiment of the present invention. FIG. 3B is a diagram for explaining the engagement between the guide rail means and the drive gear.

FIG. 4 is a view for explaining the engagement between the tilt drive means and the guide means in the third embodiment of the present invention.

FIG. 5 is a side view of a switch member and a switch engaging portion according to the first embodiment of the present invention.

FIG. 6 is a perspective view of an optical disk device according to a second embodiment of the present invention.

7A is a diagram for explaining the effect of the guide rail means in the second embodiment of the present invention, and FIG. 7B is a diagram for explaining the operation of the guide means in the conventional embodiment.

FIG. 8 is a view for explaining the operation of the support for controlling the sagging of the wire rod in the second embodiment of the present invention.

FIG. 9 is a perspective view for explaining the operation of the position regulating means in the second embodiment of the present invention.

FIG. 10A is a diagram for explaining the action of the sliding member during horizontal movement in the second embodiment of the present invention, and FIG. 10B is a diagram for explaining the action of the sliding member during reverse movement. c) is a diagram for explaining a case where the height of the protrusion is constant.

FIG. 11 (a) is a diagram for explaining movement of the biasing means in the second embodiment of the present invention, and FIG. 11 (b) is a diagram for explaining switching of sliding surfaces.

FIG. 12 is a view for explaining the action of the restriction portion on the guide means in the second embodiment of the present invention.

FIG. 13 (a) is a diagram for explaining a regulating portion of the guide rail means in the second embodiment of the present invention, and FIG. 13 (b) is a perspective view for explaining a regulating portion of the guide rail means.

FIG. 14A is a diagram for explaining a tilt driving member according to a third embodiment of the present invention, and FIG. 14B is a diagram showing the displacement of the height of the cam member.

FIG. 15 is a perspective view of a conventional optical disc device.

[Explanation of symbols]

 1 Optical Disc 2 Spindle Motor 3 Optical Pickup Means 4 Optical Pickup Moving Means 5 Guide Rail Means (First Embodiment) 6 Guide Rail Means (Second Embodiment) 7 Guide Means (First Embodiment) 8 Guide Means ( Second Embodiment 9 Spring Member 10 Tilt Driving Means 11 Substrate 12 Tooth Profile 13 Electric Circuit Part 14 Wire Rod 15 Tilt Driving Member 16 Cam Member 17 Tilt Driving Motor 18 Tilt Energizing Spring 19 Position Limiting Means 20 Driving Motor 21 Driving Gear 22 Sliding member 23 Groove part 24 Energizing means 25 Outgoing connector 26 Inlet connector 27 Tooth profile part of drive gear 28 Cylindrical part of drive gear 29 Flat part of guide rail means 30 Abutting part of cylindrical part and flat part 31 Sliding Member 32 Tilt fulcrum 33 Tilt drive gear shaft 34 Switch member 35 Switch engaging portion 36 Id shaft 37 Guide shaft 38 Fitting part 39 Support 40 Adjusting member 41 Pressing part 42 Height regulating part 43 Projection part 44 Hole part 45 Flat surface part 46 Energizing part 47 Rotation adjustment fulcrum 48 Both ends projection part 49 Central projection part 50 Pick biasing means 51 Sliding surface 52 Sliding surface 53 Separation part 54 Inversion part 55 Restriction part 56 Small protrusion 57 Linear sliding member 58 Non-engaging part 59a Displacement of cam member 59b Displacement of cam member 60 Guide means

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Kyosuke Kumazawa 1006 Kadoma, Kadoma City, Osaka Prefecture Matsushita Electric Industrial Co., Ltd. (72) Isao Hamano 1006 Kadoma, Kadoma City, Osaka Matsushita Electric Industrial Co.

Claims (15)

[Claims] 1. An optical pickup means for recording information on a disk-shaped recording medium or reproducing the recorded information, a disk rotation driving means for rotationally driving the disk-shaped recording medium, and a disk-shaped recording for the optical pickup means. An optical pickup moving means for moving the medium in the radial direction, a guide rail means for guiding the movement of the optical pickup means between the inner circumference and the outer circumference of the disk-shaped recording medium, and holding the guide rail means. In the optical disc device, the guide rail means is engaged with the optical pickup moving means, the engaging portion is groove-shaped, and a tooth-shaped portion is formed on a surface facing the groove. And an optical disc device in which the optical pick moving means includes a driving means for engaging with the tooth profile portion. 2. The optical pickup moving means includes a drive motor, a drive gear that engages with a toothed portion of the guide rail means, and a sliding member that engages with a groove portion of the guide means. 2. The optical disk device according to claim 1, wherein a sliding member engages with the guide rail means by a biasing means. 3. An optical pickup means for recording information on a disk-shaped recording medium or reproducing the recorded information, a disk rotation driving means for rotationally driving the disk-shaped recording medium, and a disk-shaped recording of the optical pickup means. An optical pickup moving means for moving the medium in the radial direction, a guide rail means for guiding the movement of the optical pickup means between the inner circumference and the outer circumference of the disk-shaped recording medium, and holding the guide rail means. Guide means to
The optical disc moving means is composed of a pick urging means for pressingly sliding the optical pickup moving means on the guide means.
A double-sided reproduction type optical disc device for reproducing information recorded on both the first surface and the second surface, wherein the guide rail means has a U-shape connected so as to face the second surface. An optical disk device having no groove and a U-shaped groove portion on the outer peripheral surface side and a tooth portion on the inner peripheral surface side. 4. The drive means includes a drive gear and a drive source for rotating the drive gear, the drive gear engaging with the toothed portion provided on the guide rail means, and the gear. Part and a cylindrical part that is on the same axis,
4. The optical disk device according to claim 1, wherein the cylindrical portion is in contact with and rotationally engaged with a flat surface portion provided on the guide rail means. 5. A switch member for detecting the moving position of the optical pickup means is provided in the optical pick moving means.
4. The optical disk device according to claim 1, wherein a switch engaging portion for engaging with the switch member and determining a moving position is provided on the guide rail means. 6. A wire rod for transmitting an electric signal between the optical pickup means and the optical pick moving means and an electric circuit section for processing information, wherein the wire rod faces the optical pickup means. The optical disc device according to claim 1 or 3, wherein the optical disc device is coupled outside the means. 7. The optical disk device according to claim 6, wherein the optical pick moving means is provided with a support for restricting the hanging of the wire rod. 8. A guide means for holding the guide rail means, and a position regulation means for urging the guide rail means to the guide means and regulating the position, the position regulation means comprising the guide rail means and the guide rail means. It comprises a position restricting portion for restricting the position between the guide means, a pressing portion for pressing the guide rail means against the guide means, and a biasing portion for adjusting and moving the guide rail means along the guide means. 4. The optical disk device according to claim 3, wherein 9. The optical pickup moving means has three projections that engage with and slide in the groove of the guide rail means, and the central one of the projections forming a line is lower than the others. An optical disk device according to claim 3, wherein: 10. A pick urging means for urging the optical pickup moving means provided on the side opposite to the guide rail means and a guide means for sliding while the pick urging means is engaged. A sliding surface, the sliding surface being separated between a first surface and a second surface of the optical disc, and different during the movement of the optical pickup means from the first surface to the second surface; The optical disk device according to claim 3, wherein the optical disk device is switched to a sliding surface. 11. A guide part is provided on the guide means for restricting a movement locus of the optical pickup moving means when the pick biasing means is switched to a different sliding surface during the reverse movement of the optical pickup moving means. 4. The optical disk device according to claim 3, wherein 12. The optical disk apparatus according to claim 3, wherein a small protrusion is provided on the guide rail means for restricting a movement locus of the optical pickup moving means while the optical pickup moving means is being reversed. 13. An optical pickup means, a disk rotation driving means for rotationally driving a disk-shaped recording medium, and an optical pickup moving means for moving the optical pickup means in a radial direction of the disk-shaped recording medium. The optical pickup moving means comprises guide means for guiding the movement path of the optical pickup moving means, and has tilt drive means for rotating the guide means with a certain fulcrum. The tilt drive means mounts the disk rotation drive means. And a tilt drive member arranged so as to be sandwiched between the guide means and the board, and power transmission means for transmitting power to the tilt drive member. Optical disk device. 14. The power transmission means uses a drive source of a disk loading mechanism for externally recording information on the disk-shaped recording medium by an optical pickup means or transporting the recorded information to a reproducible position. 14. The optical disk device according to claim 13, wherein 15. A first optical disc on the tilt drive member.
14. The optical disk device according to claim 13, further comprising: a cam member having a cam curve that provides a tilt angle corresponding to the surface of the optical disk and a cam curve having a cam curve that provides a tilt angle corresponding to the second surface of the optical disk.