JP2004178764A - Guiding device of optical pickup - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To guide an optical pickup precisely by a simple structure. <P>SOLUTION: Both ends in an axial direction of a guide shaft 14 out of a pair of guide shafts 14 and 15 which guide the optical pickup 13 slidably are supported on a chassis 12 by supporting members 30 and 31 having cam parts 30b and 30c, an elastic force is given to the guide shaft 14 by pressurizing members 32 and 33 which are equipped with guide shaft abutting parts 32a and 33b having taper surfaces leaning towards a surface vertical to a surface of the chassis 12, and a periphery of the guide shaft 14 on the opposite side is position regulated by a stopper member. Thus, the guide shaft 14 is pressurized. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a guide device for an optical pickup applied to a media disk device such as a CD (Compact Disk) player and a DVD (Digital Versatile Disk) recorder, and particularly to a guide device capable of accurately guiding the optical pickup with a simple structure. The present invention relates to a guide device.
[0002]
[Prior art]
Recent media disk devices not only support CD-ROMs (Compact Disk-Read Only Memory), but also CD-Rs (Compact Disk-Recordable), CD-RWs (Compact Disk-ReWritable), and DVDs. (Digital Versatile Disk) compatible so-called multi-drive devices have become widespread, and are being used not only as external devices of desktop personal computers but also as internal devices of notebook personal computers. ing.
[0003]
Therefore, the external dimensions are required to be as small and thin as possible, and the internal mechanism is also becoming simpler. However, in these media disk devices, information is read from or written to a disk serving as a recording medium by an optical pickup, and a corresponding precision is required for driving the optical pickup. In fact, no satisfactory proposal has been made regarding the promotion of miniaturization and thinning.
[0004]
In particular, a guide device that guides the optical pickup with respect to the disk is usually provided with a so-called tilt adjustment mechanism that adjusts the tilt of the optical pickup with respect to the disk. There was room.
That is, as a conventional optical pickup guide device, for example, as described in Patent Document 1, the end of a rail member that guides the optical pickup slidably is supported by a spring member, and the height is adjusted by an adjusting screw. What has been proposed has been proposed. Alternatively, as disclosed in Patent Document 2, there has been proposed a configuration in which an end of a guide shaft for guiding an optical pickup is supported by a cam, and the end is pressed against the cam from above by a return coil spring.
In the former, since the ends of the rail members are supported by springs, there is a problem that the configuration of the portions becomes complicated and the device must be large.
In the latter case, the structure is simple, but since the structure is such that the guide shaft is pressed against the cam by the return coil spring, large parts are required, and furthermore, there is a problem that sufficient accuracy cannot be obtained. It is.
[Patent Document 1]
JP 2001-266363 A (Page 6, [0030], FIG. 2)
[Patent Document 2]
JP 2001-307436 A (page 4 [0025], FIG. 3)
[0005]
[Problems to be solved by the invention]
As described above, the conventional optical pickup guide device has a problem that the structure of the tilt adjustment mechanism is complicated, which is not sufficient in terms of miniaturization, and that a satisfactory accuracy cannot be obtained. .
The present invention has been made in view of the above points, and has a configuration in which an end of a guide shaft is supported by a support member having an adjustment mechanism, and a pressurizing member is configured to apply a pressure to the guide shaft. Accordingly, it is an object of the present invention to provide an optical pickup guide device capable of achieving miniaturization of the device and securing accuracy.
[0006]
[Means for Solving the Problems]
A guide device for an optical pickup according to the present invention includes: a guide shaft for slidably supporting an optical pickup device for recording or reproducing information on a disk medium in a radial direction of the disk medium; and A plurality of supporting members for supporting the guide shaft, an adjusting mechanism provided on at least one of the supporting members to adjust an interval between the chassis surface of the guide shaft, and the adjusting shaft moving the guide shaft to the chassis surface direction. Pressurizing means that presses the guide shaft with a predetermined pressure, and a combined vector in a direction perpendicular to the chassis surface toward the chassis surface with respect to the guide shaft and in a direction horizontal to the chassis surface with respect to the guide shaft. A pressurizing member having a tapered surface capable of applying a force having A stopper provided so as to contact the peripheral surface of the guide shaft on the side opposite to the peripheral surface with which the pressurizing member abuts to regulate the position of the guide shuff. Pressurizing means comprising a member.
[0007]
According to the present invention, an optical pickup can be guided accurately with a simple structure.
The guide device for an optical pickup according to the present invention further comprises: a pair of guide shafts for slidably supporting an optical pickup device for recording or reproducing information on a disk medium in a radial direction of the disk medium; A plurality of support members each supporting an axial end of the guide shaft with respect to the chassis, and an adjustment mechanism provided on each of the support members of the one guide shuff to adjust a gap between the chassis surface of the guide shaft and Pressurizing means for pressing a guide shaft supported by a support member provided with the adjusting mechanism with a predetermined pressure in the direction of the chassis surface toward the adjusting mechanism, wherein the guide shaft abuts on a peripheral surface of the guide shaft. A force having a combined vector in a direction perpendicular to the chassis surface toward the chassis surface and in a direction horizontal to the chassis surface with respect to the shaft. A pressurizing member having a taper surface capable of being applied, an elastic member for applying the elastic force in the composite vector direction by pressing the pressurizing member against the shaft, and the pressurizing member of the guide shaft are in contact with each other. Pressurizing means comprising a stopper member provided to abut on a peripheral surface opposite to the peripheral surface to regulate the position of the guide shuff.
[0008]
According to the present invention, an optical pickup can be guided accurately with a simple structure.
[0009]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
FIG. 1 is a plan view showing a media disk device 10 provided with an optical pickup guide device according to an embodiment of the present invention. FIG. 2 is a back view of the device 10 shown in FIG. 1 as viewed from the back. FIG. 3 is a diagram mainly showing an optical pickup extracted from FIG.
[0010]
In FIG. 1, reference numeral 11 denotes a turntable on which a disk (not shown) is mounted, and which is fixed to a rotating shaft of a disk drive motor (not shown) mounted on a chassis 12.
An optical pickup 13 is slidably guided by a pair of guide shafts 14 and 15.
3, the optical pickup 13 has an optical pickup main body 16, a printed wiring board 17 to which the optical pickup main body 16 is attached, and a holder 18 to which the printed wiring board 17 is attached. An engagement member 19, 20 slidably engaged with the guide shafts 14, 15 is provided on 18.
[0011]
The engaging member 19 that engages with the guide shaft 14 is formed as a single unit, and two engaging members 20 that engage with the guide shaft 15 are provided at predetermined intervals in the axial direction of the guide shaft 15.
The engagement members 20 are accommodated in a rack 21 fixed to the holder 18. A rack 22 is formed outward in the rack portion 21, and a pinion gear 23 is meshed with the rack 22.
The rotation of the pinion gear 23 transmits the axial force of the guide shafts 14 and 15 to the rack 22, so that the optical pickup 13 is transported while being guided by the guide shafts 14 and 15.
The pinion gear 23 is driven by a feed motor 25 attached to a bent portion 24 of the chassis 12.
That is, as shown in FIG. 2, a worm gear 26 is provided on the rotation shaft of the feed motor 25, and the worm gear 26 drives a gear 27. The pinion gear 23 is formed coaxially and integrally with the gear 27. Eventually, the pinion gear 23 is driven by the feed motor 25 via the gear 27 and the optical pickup 13 is transferred. The gear 27 is a spur gear or a helical gear.
[0012]
FIG. 1 shows a state in which the optical pickup 13 is located on the innermost side of a disc (not shown). From this state, the optical pickup 13 is transferred in a direction away from the turntable 11 by one rotation of the feed motor, and By the rotation, it is transported in a direction approaching the turntable 11.
[0013]
In FIG. 3, a connector 28 is provided on the printed wiring board 17, and a cable 29 is connected to the connector 28 to exchange signals with the optical pickup main body 16.
Next, an embodiment of the guide device for an optical pickup of the present invention will be described in detail.
In FIG. 1, both ends of the guide shaft 14 are supported by the chassis 12 by support members 30 and 31, respectively. Each of the support members 30 and 31 is formed in a cylindrical shape having a cam portion whose height with respect to the chassis surface changes at the tip, and is configured to be rotatable about an axis.
[0014]
The guide shaft 14 is assembled so that both ends in the axial direction are mounted on the cam portions of the support members 30 and 31.
Pressurizing members 32 and 33 are provided adjacent to the support members 30 and 31, respectively. Each of the pressurizing members 32 and 33 has a tapered surface capable of applying a force to the guide shaft 14 in a combined vector direction in a direction perpendicular to the surface of the chassis 12 and in a direction parallel to the surface of the chassis 12. The pressure is applied by being pressed against the guide shaft 14 by the elastic members 34 and 35 constituted by compression springs.
[0015]
Further, stopper members 36 and 37 are provided adjacent to the pressurizing members 32 and 33 so as to contact a peripheral surface of the guide shaft 14 opposite to the peripheral surface of the guide shaft 14 with which the pressurizing members 32 and 33 contact. The stopper members 36 and 37 receive the pressurization applied to the guide shaft 14 by the pressurization members 32 and 33 on the side opposite to the direction of the pressurization, and regulate the position of the guide shaft 14, thereby controlling the position of the guide shaft 14. The pressure acts on the guide shaft 14 normally.
[0016]
In this state, when the support members 30 and 31 are rotated, the cam portion in contact with the guide shaft 14 moves, and the height of the guide shaft 14 with respect to the surface of the chassis 12 can be adjusted.
As shown in FIG. 2, the support members 30 and 31 have adjustment grooves 30a and 31a formed on the rear surface side of the chassis 12 so as to be rotationally driven by a jig such as a flathead screwdriver. It is configured to rotate by inserting and turning a jig.
[0017]
As described above, the height and the inclination of the guide shaft 14 with respect to the chassis 12 can be adjusted.
In the device 10 shown in FIG. 1, the guide shaft 15 is also supported by the chassis 12 by a support member 38 having an adjustment mechanism.
That is, the guide shaft 15 has one end in the axial direction supported by the chassis 12 so as to be adjustable by the support member 38, and the other end supported in an unadjustable state. The support member 38 integrally has a fitting portion 38a into which the guide shaft 15 is fitted and an adjusting portion 38b, and is slidably attached to a shaft 38c implanted in the chassis 12 at an intermediate portion. Have been. The adjusting portion 38b is configured to be mounted on a cylindrical cam portion. By rotating the cam portion, the distance of the adjusting portion 38b from the surface of the chassis 12 is changed, and the adjusting portion 38b is integrally formed. The position of the fitting portion 38a is also changed in the same manner, so that the guide shaft 15 can be adjusted.
[0018]
As shown in FIG. 2, a groove 38d to which a jig is coupled is provided so that the adjustment portion 38b can also rotate from the rear side of the chassis 12.
FIG. 4 is a diagram showing the configuration of the guide shaft 14 and the support members 30 and 31 in detail.
The support member 30 has a cam portion 30b having a cam surface inclined with respect to the chassis 12 at the distal end of the cylindrical large-diameter portion, and the cam portion 30b is attached to the chassis 12 so that the cam portion 30b rotates about an axis. Outsert molded with resin. As described above, the adjusting groove 30a (see FIG. 2) is provided on the rear surface side of the chassis 12, and the cam portion 30b is rotated by inserting a jig into the groove 30a and rotating. Then, the height of the cam surface on which the guide shaft 14 is mounted changes, and the height of the guide shaft 14 is adjusted.
[0019]
Similarly, the supporting member 31 has a cam portion 31b having a cam surface inclined with respect to the chassis 12 at the end of the cylindrical large-diameter portion so that the cam portion 31b rotates about an axis. The chassis 12 is outsert molded of resin. As described above, the adjustment groove 31a (see FIG. 2) is provided on the rear surface side of the chassis 12, and the cam portion 31b is rotated by inserting a jig into the groove 31a and rotating. Then, the height of the cam surface on which the guide shaft 14 is mounted changes, and the height of the end of the guide shaft 14 is adjusted.
[0020]
The pressurizing members 32 and 33 and the stopper members 36 and 37 are provided adjacent to the support members 30 and 31, and the guide shaft 14 is supported by the pressurizing members 32 and 33 and the stopper members 36 and 37. The members 30 and 31 are pressed against the cam surfaces of the cam portions 30b and 31b with a predetermined force.
[0021]
FIG. 5 is a diagram showing a state in which the pressurizing member 32 and the stopper member 36 are particularly taken out and viewed from the axial direction of the guide shaft 14 in order to explain the operation of the pressurizing members 32 and 33 and the stopper members 36 and 37. It is.
The pressurizing member 32 includes a base portion 32a implanted in the chassis 12 and a guide shaft contact portion 32b extending from the end of the base portion 32a on the chassis 12 side so as to face the base portion 32a at a predetermined interval. A tapered surface 32c that is inclined in the surface direction of the chassis 12 is provided on the opposite side of the base portion 32a of the guide shaft contact portion 32b. The pressurizing member 32 is outsert-molded with respect to the chassis so that the above-described portions are integrally formed, and the guide shaft contact portion 32b has its own elasticity.
[0022]
Further, an elastic member 34 composed of a compression spring is fitted between the base 32a and the guide shaft contact portion 32b.
The stopper member 36 has a guide shaft contact surface 36a formed substantially perpendicularly to the surface of the chassis 12 from the tip, and is outsert-molded to the chassis 12 by resin. The guide shaft abutment surface 36 a is provided to a position closer to the surface of the chassis 12 than the lowest portion of the cam surface of the support member 30.
[0023]
By the action of the elastic member 34, the tapered surface 32 c of the guide shaft contact portion 32 b of the pressurizing member 32 abuts on the guide shaft 14 with a predetermined elastic force, and the guide shaft 14 is inclined in the plane direction of the chassis 12. Press in the direction. That is, the force at this time is a vector-like combination of the force in the direction of the guide shaft parallel to the surface of the chassis 12 and the force in the vertical direction toward the surface of the chassis 12.
[0024]
The guide shaft abutment surface 36a of the stopper member 36 abuts on the peripheral surface of the guide shaft 14 opposite to the peripheral surface that abuts the guide shaft abutment portion 32b of the pressurizing member 32. The position in the direction parallel to the surface of the chassis 12 is regulated. That is, pressurization in a direction parallel to the surface of the chassis 12 is achieved.
[0025]
On the other hand, the position of the guide shaft 14 in the direction perpendicular to the surface facing the surface of the chassis 12 is regulated by the cam portion 30b of the support member 30, and pressurization in the same direction is achieved.
As a result, the end of the guide shaft 14 is supported by the support member 30 with an appropriate elastic force, and the distance to the surface of the chassis 12 can be adjusted with high accuracy.
The pressurizing member 33 and the stopper member 37 on the other support member 31 side have exactly the same configuration as that shown in FIG. 5, and a detailed description thereof will be omitted.
In the configuration described above, the distance between the surface of the chassis 12 at both ends in the axial direction of the guide shaft 14 and the distance between the surface of the chassis 12 at the end supported by the support member 38 of the guide shaft 15 are adjusted. Thus, the tilt of the optical pickup can be adjusted.
[0026]
In the embodiment described above, both ends of the guide shaft 14 are configured to be supported and adjusted by the support members having the adjusting mechanism. However, it is not always necessary to provide both the supporting members with the adjusting mechanism. Alternatively, the adjustment mechanism may be provided only on one of the support members. In that case, the pressurizing member and the stopper member do not necessarily need to be provided close to the supporting member with the adjusting mechanism.
[0027]
As described above, according to the guide device of the optical pickup of the present invention, the guide shaft is supported by the support member having the cam portion, and the pressurizing member and the stopper member apply the pressurizing to the guide shaft. As a result, the guide shaft can be accurately supported with a simple structure.
[0028]
【The invention's effect】
As described above, according to the present invention, the guide shaft is supported by the support member having the cam portion, and the guide shaft is provided with a composite vector in the direction parallel to the chassis surface and the direction perpendicular to the chassis surface by the pressurizing member. In addition to applying the elastic force represented by the formula (1), the position of the peripheral surface on the opposite side of the guide shaft is regulated by the stopper member, so that the optical pickup can be guided accurately with a simple structure.
[Brief description of the drawings]
FIG. 1 is a plan view showing an apparatus equipped with an optical pickup guide device according to the present invention.
FIG. 2 is a back view of the device shown in FIG. 1 as viewed from the back side.
FIG. 3 is a diagram showing a configuration of a main part of the device shown in FIG. 1;
FIG. 4 is a diagram showing a configuration of another main part of the device shown in FIG. 1;
FIG. 5 is a view of a main part of the device shown in FIG. 4, viewed from another direction.
[Explanation of symbols]
11 Turntable 12 Chassis 13 Optical Pickups 14 and 15 Guide Shaft 16 Optical Pickup Body 17 Printed Wiring Board 18 Holder 19 and 20 Engaging Member 21 Rack 22 Rack 23 Pinion Gear 25 Feed motor 26 Worm gear 27 Gears 30 and 31 Support members 32 and 33 Pressurizing members 36 and 37 Stopper member

Claims (8)

A guide shaft for slidably supporting an optical pickup for recording or reproducing information on a disk medium in a radial direction of the disk medium;
A plurality of support members for supporting the guide shaft with respect to a chassis,
An adjusting mechanism provided on at least one of the support members to adjust a gap between the guide shaft and the chassis surface;
Pressurizing means for pressing the guide shaft against the adjusting mechanism with a predetermined pressure in the direction of the chassis surface, wherein the pressurizing means abuts on a peripheral surface of the guide shaft and is perpendicular to the chassis surface relative to the guide shaft. A pressurizing member having a tapered surface capable of applying a force having a combined vector in a direction toward the surface and a direction parallel to the chassis surface, and the pressurizing member is pressed against the guide shaft so that the force in the combined vector direction is reduced. An elastic member for applying elastic force and a stopper member provided to abut on a peripheral surface of the guide shaft opposite to the peripheral surface with which the pressurizing member abuts to regulate the position of the guide shaft. Pressurizing means,
A guide device for an optical pickup, comprising: The guide device for an optical pickup according to claim 1, wherein the pressurizing member and the stopper member are provided near the support member. The guide device for an optical pickup according to claim 1, wherein the support member is arranged to support both ends of the guide shaft in the axial direction. A pair of guide shafts that support an optical pickup device for recording or reproducing information on or from a disk medium so as to be slidable in the radial direction of the disk medium;
A plurality of support members for supporting the axial end of the guide shaft with respect to the chassis,
An adjusting mechanism provided on each of the support members of the one guide shaft so as to adjust an interval between the guide shaft and the chassis surface;
Pressurizing means for pressing a guide shaft supported by a support member provided with the adjusting mechanism against the adjusting mechanism at a predetermined pressure in a surface direction of the chassis, wherein the pressing shaft abuts on a peripheral surface of the guide shaft and A pressurizing member having a tapered surface capable of applying a force having a combined vector in a direction perpendicular to the chassis surface toward the chassis surface and in a direction horizontal to the chassis surface; and The guide shaft is restricted by contacting the peripheral surface of the guide shaft opposite to the peripheral surface with which the pressurizing member comes into contact with the elastic member for applying elastic force in the combined vector direction by pressing the guide shaft. Pressurizing means comprising a stopper member provided in
A guide device for an optical pickup, comprising: The guide device for an optical pickup according to claim 4, wherein the pressurizing member and the stopper member are provided near the support member. One of two support members of a guide shaft different from the guide shaft supported by the support member provided with the adjustment mechanism is provided with an adjustment mechanism for adjusting a distance between the guide shuff and the chassis surface. The guide device for an optical pickup according to claim 4, wherein: The pressurizing member extends from the base laid on the chassis to a base with a predetermined interval from the chassis-direction end of the base so as to face the base at a predetermined interval. A guide shaft contact portion provided with the tapered surface on the opposite side,
9. The optical pickup guiding device according to claim 1, wherein the elastic member is disposed between a surface opposite to the tapered surface and the base. The optical pickup guide device according to claim 7, wherein the pressurizing member is outsert-molded to the chassis by resin, and the guide shaft contact portion has elasticity.

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