WO2017051491A1

WO2017051491A1 - Optical pickup unit and optical disc drive

Info

Publication number: WO2017051491A1
Application number: PCT/JP2016/002964
Authority: WO
Inventors: 貴晴鈴木; 池田　直人; 貴義菅井
Original assignee: ソニー株式会社
Priority date: 2015-09-24
Filing date: 2016-06-21
Publication date: 2017-03-30

Abstract

This optical pickup unit includes: an optical pickup having an optical pickup body and a base on which the optical pickup body is mounted; a first guide support provided on the base and slidably supporting a first guide part; and a second guide support provided on the base and slidably supporting a second guide part. The optical pickup unit is configured such that: the first guide support is used as a bearing for the first guide part; the second guide support is configured in such a way that a first guide receiving part and a second guide receiving part are coupled by a coupling part so as to face each other; the second guide part is disposed in the inner space formed between the first and the second guide receiving parts; and the outer side of either one of the first and second guide receiving parts is in contact with the base, and the outer side of the other one of the first and the second guide receiving parts is in contact with a spring member.

Description

Optical pickup unit and optical disk drive

The present technology relates to an optical pickup unit and an optical disc drive used for recording information on an optical disc or reading information from an optical disc.

The optical pickup is transported in the radial direction of the optical disk by the feed mechanism. As a feeding mechanism, a configuration is known in which an optical pickup is moved by a lead screw rotated by a driving force of a driving unit (motor). A feed mechanism having a worm gear configuration is also known. A parallel main axis and sub axis are provided as guides during transfer, and the optical pickup is guided by these axes. In some cases, the lead screw also serves as the main shaft. Further, as described in Patent Document 1, a resin guide member integrated with the mechanical chassis of the optical pickup unit is formed, and a resin slidable member is formed between the guided portion (guide receiving portion) of the optical pickup. A configuration for mounting is proposed.

It has been proposed to provide a mechanism for correcting tilt in the tangential direction (track direction) in connection with the optical pickup unit. For example, in Patent Document 2, by rotating a metal adjustment pin, the carriage is moved up and down with respect to the guide member, and tilt adjustment in the tangential direction is performed.

JP 2007-95207 A JP 2005-166225 A

In the device described in Patent Document 1, a sliding member is disposed above the guide receiving portion on the optical pickup side, and a leaf spring is disposed below the sliding member. Therefore, there is a problem that the guide portion on the mechanical chassis side is scraped by the leaf spring during sliding to generate powder. In order to avoid this, it is necessary to apply grease. The application of grease causes problems such as an increase in cost.

Similarly, the one described in Patent Document 2 also requires grease application because of the configuration in which the guide portion is sandwiched between the metal adjustment pin and the leaf spring. Furthermore, when the skew in the tangential direction is adjusted, there is a problem that the amount of bending of the leaf spring changes, and the change in the amount of spring force increases accordingly. When the change in force becomes large, a design with a considerable margin is required for the feed mechanism, which is disadvantageous for low cost and space saving. Furthermore, since the metal leaf spring contacts the guide portion, it is necessary to consider the durability of the guide portion, and it is necessary to apply grease.

Therefore, an object of the present technology is to provide an optical pickup unit and an optical disc drive that eliminates the need for applying grease and prevents the amount of bending of the spring from fluctuating due to skew adjustment in the tangential direction.

In order to solve the above-described problem, the present technology provides an optical pickup body having an optical pickup body and a base to which the optical pickup body is attached;
A first guided portion provided on the base and slidably supporting the first guide portion;
A second guided portion provided on the base and slidably supporting the second guide portion;
The first guided portion is a bearing for the first guide portion,
The second guided portion is connected by the connecting portion so that the first guide receiving portion and the second guide receiving portion face each other,
The second guide portion is disposed in the opposing space inside the first and second guide receiving portions,
The optical pickup unit is configured such that one outer side of the first and second guide receiving portions is in contact with a base and the other outer side of the first and second guide receiving portions is in contact with a spring member.
The present technology also includes a disk table on which an optical disk is mounted,
An optical pickup unit;
A loading mechanism for mounting the optical disc on the disc table;
The optical pickup unit
An optical pickup having an optical pickup body and a base to which the optical pickup body is attached;
A first guided portion provided on the base and slidably supporting the first guide portion;
A second guided portion provided on the base and slidably supporting the second guide portion;
The first guided portion is a bearing for the first guide portion,
The second guided portion is connected by the connecting portion so that the first guide receiving portion and the second guide receiving portion face each other,
The second guide portion is disposed in the opposing space inside the first and second guide receiving portions,
The optical disk drive is configured such that one outer side of the first and second guide receiving portions is in contact with a base and the other outer side of the first and second guide receiving portions is in contact with a spring member.

According to at least one embodiment, the second guide portion is sandwiched by the first and second guide receiving portions of the second guided portion of the optical pickup unit. Therefore, it is possible to eliminate the need for applying grease, and to avoid problems due to applying the grease. Note that the effects described here are not necessarily limited, and may be any of the effects described in the present specification.

It is a basic diagram used for description of the conventional optical pickup unit. It is an approximate line figure for explaining an outline of an example of this art. It is an approximate line figure for explaining an outline of other examples of this art. It is a perspective view of the optical pick-up unit which can apply this art. It is the perspective view which looked at the optical pick-up from the top. It is the perspective view which looked at the optical pick-up from the bottom. It is the perspective view which looked at the optical pick-up for demonstrating attachment of a to-be-guided part from the bottom. It is the front view and side view of a U-shaped component in one embodiment of this art. It is a side view for demonstrating the to-be-guided part of one embodiment of this art. It is sectional drawing for demonstrating the to-be-guided part of one embodiment of this technique.

Hereinafter, embodiments of the present technology will be described. The embodiments described below are preferred specific examples of the present technology, and various technically preferable limitations are given. However, the scope of the present technology is not limited to the present technology in the following description. Unless otherwise specified, the present invention is not limited to these embodiments.

<1. Overview of this technology>
The skew adjustment using the optical pickup unit will be described. The light beam from the optical pickup attached to the optical pickup unit is preferably irradiated perpendicularly to the optical disk. However, it is difficult to satisfy such conditions, and the incident angle of the laser beam with respect to the optical disc has an angle shifted from the vertical, and the angle also varies. Therefore, skew adjustment is performed to bring the optical axis closer to vertical by tilting the mounting angle of the optical pickup in the skew direction with respect to the mechanical chassis of the optical pickup unit.

The optical disc apparatus includes a signal processing unit that detects tangential skew based on a signal read from the optical disc, feeds back the detected result to the skew adjustment device of the optical pickup, and corrects the tangential skew. The tangential skew varies depending on the optical disk, and making it possible to correct all of the skews with a large burden increases the skew adjustment device. Therefore, at the time of manufacturing the optical disc drive, tangential skew is detected for a plurality of optical discs, and the range of the detected tangential skew variation is divided into two, for example, one variation center (referred to as Tan + as appropriate) and the other. The center of variation (referred to as Tan- as appropriate) is detected. Then, adjustment in the tangential direction is performed so that Tan + or Tan− is corrected when the optical pickup is attached to the optical pickup unit.

In order to understand this technology, a skew adjustment mechanism in the configuration of an existing optical pickup unit will be described with reference to FIG. The optical pickup unit is slidable with respect to a guide shaft (first guide portion or main shaft) AX attached to the mechanical chassis and a guide portion G (second guide portion or auxiliary shaft) formed on the mechanical chassis. Combined with The guide part G is integral with the mechanical chassis. The leaf spring SP contacts from the lower side of the guide part G.

For adjusting the tangential skew, the adjusting member SK1 or SK2 is inserted between the sliding surfaces of the guide part G and the base B. In the example shown in FIG. 1, the thickness of the adjustment member SK1 is set to correct Tan +, and the thickness of the adjustment member SK2 is set to correct Tan−. When the tangential skew is adjusted in this way, the amount of bending of the leaf spring SP differs between the adjusting members SK1 and SK2. That is, the amount of deflection becomes larger when the adjustment member SK1 having a larger thickness is used, and the frictional force at the time of sliding becomes larger. In order to cope with the maximum frictional force, it is necessary to design the feed mechanism with a sufficient margin.

FIG. 2 is a diagram for explaining an example of the present technology, in which a U-shaped part is used as the adjustment member SC. The adjustment member SC is made of a synthetic resin having a low friction coefficient, such as polyacetal (POM). Other examples of this type of synthetic resin are polyamide (PA), polytetrafluoroethylene (PTFE) and the like. The adjustment member SC has two plate-like portions protruding parallel to each other as a guide receiving portion and a connecting portion for connecting the guide receiving portion (plate-like portion), and the two plate-like portions approach / separate each other. Has elasticity. The thicknesses a and b of the two plate-like portions are in a relationship of (a> b), where the distance between the opposing surfaces is c and the total height is d, (d = a + b + c: constant) ing. As shown in FIG. 2, the height d is equal to or slightly larger than the gap between the base B and the leaf spring SP. Therefore, in a state where the adjustment member SC is attached to the base B, the leaf spring SP is bent slightly.

The adjustment member SC can be attached to a predetermined attachment location of the base B of the optical pickup. At the time of Tan + correction, as shown in FIG. 2A, the guide part G formed on the mechanical chassis is suppressed from the top by the plate-like part (thickness a), and from below the plate-like part (thickness b <a) is suppressed. The adjustment member SC is attached to the base B. At the time of Tan- correction, as shown in FIG. 2B, the guide portion G formed on the mechanical chassis is adjusted so that the plate-like portion (thickness b) is suppressed from the top and the plate-like portion (thickness a) is suppressed from the bottom. The member SC is attached to the base B. That is, the tangential skew Tan + or Tan− can be corrected according to the vertical direction of the adjustment member SC at the time of mounting. As can be seen from FIG. 2, even if the adjustment member SC is turned upside down, the amount of bending of the leaf spring SP does not change. Therefore, a design having a considerable margin for the feed mechanism is not required.

FIG. 3 is a diagram for explaining another example of the present technology, and uses an adjustment member SX. The adjustment member SX is made of a synthetic resin having a low friction coefficient, such as polyacetal (POM), like the adjustment member SC. The adjustment member SX has two plate-like portions that protrude in parallel with each other and a connecting portion that connects the plate-like portions, and has elasticity in a direction in which the two plate-like portions approach / separate. Each of the two plate-like portions has two types of thicknesses (A1, B1) and (A2, B2). These thicknesses have a relationship of (B2 <B1 <A1 <A2), where the distance between the opposing surfaces is C and the total height is D (D = A1 + B1 + C: constant), (D = A2 + B2 + C : Constant). As shown in FIG. 3, the height D is equal to or slightly larger than the gap between the base B and the leaf spring SP.

In another example, unlike the guide part G in the example, a countershaft SAX is provided. Therefore, since the countershaft SAX can be removed from the mechanical chassis, the adjusting member SX can be attached to the countershaft SAX in the up-down direction and reversed in the front-back direction. 3A and 3B show a case where the adjustment member SX is inverted in the vertical direction, and FIGS. 3C and 3D show a case where the adjustment member SX is inverted in the front-rear direction and the vertical direction. The thicknesses A1 and B1 are intermediate values with relatively small differences, and the amount of tangential skew adjustment is small. Since (A1 <A2) (B1> B2), the adjustment amount of the tangential skew is large when the thicknesses are A2 and B2. Thus, in another example, four types of tangential skew can be adjusted.

In the present technology, since the tangential skew is adjusted based on the tangential skew of the drive detected at the time of manufacturing the drive, it is not usually performed again after the adjustment is made. Therefore, it is not necessary to make the adjustment member detachable, and various fixing methods such as screwing and adhesion can be used as a method for attaching the adjustment member to the base. However, in one embodiment to be described later, it is possible to easily attach the adjustment member to the protrusions and steps formed at the predetermined attachment locations of the base using the elasticity of the adjustment member.

Further, as the adjustment member, the height of the base relative to the guide member is switched by upside down and / or front and back inversion, but an adjustment member having the same thickness of the opposing plate-like portions can be used. That is, two adjustment members having different thicknesses may be prepared, and the adjustment member may be selected according to the tangential skew and attached to the base. Three or more thicknesses can be selected.

<2. Embodiment>
"Configuration of optical pickup unit"
An embodiment for implementing the optical pickup feeding mechanism and the optical pickup unit of the present technology will be described.
In the following description, it is assumed that the rotation axis direction of the optical disk is the vertical direction, and the moving direction of the optical pickup is the front-back direction, indicating the vertical, front-rear, left-right directions. Note that the up / down / front / rear / right / left directions are for convenience of explanation, and the implementation of the present technology is not limited to these directions.

In the optical disk drive, required members and mechanisms are arranged in a case (not shown), and a disk insertion slot (not shown) is formed in the case. The optical pickup unit 1 shown in FIG. 4 is accommodated in the case. The optical pickup unit 1 includes a resin molded product or a metal mechanical chassis 2. The mechanical chassis 2 is of a frame type having an opening at the center, and the optical pickup 4 moves in the opening.

The disk table 3 is fixed to the motor shaft of the spindle motor attached to the mechanical chassis 2. The center hole of the optical disc inserted in the case is fitted to the disc table 3. The optical disk is conveyed onto the disk table 3 by a loading mechanism (not shown). A configuration in which a loading mechanism is added to the optical pickup unit 1 is referred to as an optical disc drive. As the loading mechanism, either a known slot-in method (suction method) or a tray method may be used.

The optical pickup 4 is provided so as to be slidable in the front-rear direction by an optical pickup transfer mechanism. The optical pickup 4 has a configuration in which an optical pickup main body having an optical element such as an objective lens 5, a laser diode, a photoelectric conversion element and the like is attached to a base, records information on the optical disk, and reads information from the optical disk. Is. As the optical disc, for example, BD (Blu-ray Disc (registered trademark)) can be used. In addition to BD (Blu-ray Disc (registered trademark)), other optical disks such as DVD (Digital Versatile Disc (registered trademark)) can be recorded and reproduced.

In order to send the optical pickup 4, a feed motor 6 is provided in the mechanical chassis 2. A feed screw 7 rotated by the feed motor 6 is supported by the mechanical chassis 2. The base of the optical pickup 4 and the feed screw 6 are coupled. A metal guide shaft (first guide portion or main shaft) 8 is supported on the mechanical chassis 2 for guiding when the optical pickup 4 is transferred. A guide portion 9 (second guide portion or auxiliary shaft) protruding from the mechanical chassis 2 is formed integrally with the mechanical chassis 2. The guide portion 9 is a convex portion formed at the end of the mechanical chassis 2 in parallel with the guide shaft 8.

"Configuration of optical pickup"
5, 6 and 7 are enlarged perspective views showing the optical pickup 4. FIG. FIG. 5 is a perspective view of the optical pickup 4 viewed from above, and FIGS. 6 and 7 are perspective views of the optical pickup 4 viewed from below. The optical pickup 4 has a base 11 made of, for example, a synthetic resin, and an optical pickup main body is attached to the base 11. The base 11 is provided with a bearing portion 12 as a first guided portion into which the guide shaft 8 is inserted on one side surface in the left-right direction.

A portion (second guided portion) 13 for receiving the guide portion 9 is provided on the other side surface of the base 11 in the left-right direction. The guided portion 13 has a configuration in which a U-shaped part 14 and a spring member 15 as adjustment members are attached from the back side of the base 11 with attachment screws 16 as shown in FIG. That is, the U-shaped part 14 and the spring member 15 are inserted straight from the lower surface side of the base 11 in this order, and the U-shaped part 14 and the spring member 15 are fixed by the mounting screw 16. The U-shaped part 14 is engaged with engaging portions (steps and protrusions) formed at predetermined mounting locations of the base 11, and the spring member 15 presses the U-shaped part 14 upward from below. .

"Example of U-shaped parts"
As described above, the U-shaped component 14 is made of a synthetic resin having a low friction coefficient, such as polyacetal (POM). Other examples of this type of synthetic resin are polyamide (PA), polytetrafluoroethylene (PTFE) and the like. An example of the U-shaped component 14 will be described with reference to FIG. FIG. 8A is a front view of the U-shaped part 14, and FIG. 8B is a side view of the U-shaped part 14. The U-shape represents the shape of the part when viewed from the front. The U-shape represents a shape similar to a shape obtained by rotating an English U-shape by 90 degrees.

The U-shaped component 14 has a first plate-like portion 21a and a second plate-like portion 21b that protrude in parallel with each other and a connecting portion 21c that connects the plate-like portions. The connecting portion 21c is curved outward and has a small thickness, and has elasticity in a direction in which the two plate-

like portions

21a and 21b approach / separate. In order to set the elasticity to an appropriate value, an opening 21d is formed in the connecting portion 21c. The thickness a of the plate-like portion 21a is different from the thickness b of the plate-like portion 21b. The guide portion 9 is disposed in a space between the plate-like portion 21a and the plate-like portion 21b.

The opposing

inner surfaces

22a and 22b of the plate-

like portions

21a and 21b are surfaces that contact the guide portion 9 formed in the mechanical chassis 2, and the

outer surfaces

23a and 23b of the plate-

like portions

21a and 21b are light This surface is in contact with the base 11 or the spring member 15 of the pickup. The distance between the

inner surfaces

22 a and 22 b is equal to or slightly larger than the height (thickness) of the guide portion 9. Between the inner surface 22a and the outer surface 23a is a thickness a corresponding to the tangential skew adjustment amount, and between the inner surface 22b and the outer surface 23b is a thickness b corresponding to the tangential skew adjustment amount. The distance d between the

outer surfaces

23a and 23b is a constant value even when the U-shaped component 14 is turned upside down.

A mounting plate 24a and a mounting plate 25a are formed so as to extend upward from both side end portions of the plate-like portion 21a and have portions that are parallel to each other and engageable with the mounting portion of the base 11. An engaging hook 26a is formed at the tip of the mounting plate 24a. Furthermore, a notch 27a for engagement is formed in the mounting plate 25a. Similarly to the plate-like portion 21a, parallel mounting

plates

24b and 25b are formed for the other plate-like portion 21b. An engagement hook 26b is formed on the mounting plate 24b, and an engagement notch 27b is formed on the mounting plate 25b.

Furthermore, in order to discriminate the orientation when the U-shaped part 14 is inserted from the appearance, for example, a plate-like protrusion 28 is formed at the tip of the mounting plate 25b. Further, for example, the orientation at the time of insertion of the U-shaped component 14 may be determined by determining the presence or absence of the protrusion 28 by an optical detector using a laser beam.

Since the U-shaped part 14 has a symmetrical shape as described above, it can be mounted upside down with respect to a predetermined portion of the base 11. The plate-

like portions

21a and 21b are turned upside down with respect to the guide portion 9 depending on the orientation at the time of attachment. Therefore, the height of the U-shaped part 14 with respect to the guide portion 9 changes depending on the orientation at the time of attachment. On the other hand, since the position (height) of the guide shaft 8 is constant, the optical pickup 4 rotates in the tangential direction and the tangential skew is adjusted.

"Mounting state of U-shaped parts"
9 and 10 are cross-sectional views showing a state in which the U-shaped component 14 is attached to the base 11 of the optical pickup 4. 9A is a view in which the guide portion 9 is omitted, and FIG. 9B is a view including the guide portion 9. Further, FIG. 9 shows a state in which the U-shaped component 14 is inserted into the base 11 from the mounting

plates

24b and 25b as indicated by arrows in FIG. 9A. Therefore, the upper thickness of the guide portion 9 is b, and the lower thickness is a.

The mounting

plates

24b and 25b of the U-shaped component 14 are inserted through slits or notches formed in the base 11, and the end of the spring member 15 is placed on the plate-shaped portion 21a. The spring member 15 is attached by an attachment screw 16. The hook 26b of the U-shaped component 14 is engaged with the step formed at the mounting location of the base 11, and the convex portion formed at the mounting location is fitted into the notch 27b of the U-shaped component 14. Further, as shown in FIG. 10, the spring member 15 is attached to be inclined upward toward the tip. As a result, a predetermined spring force is generated from the lower side to the upper side of the U-shaped component 14.

"Effects of this technology"
As described above, since the U-shaped component having a small friction coefficient is used as the guided portion, it is not necessary to apply grease to the contact surface with the guide portion. As a result, low cost can be achieved, application equipment can be eliminated, personnel can be reduced, and in environments where there is a lot of dust, the grease can be mixed into the grease and damage the contact surface. The factor of lowering the wear resistance can be eliminated. Furthermore, the tangential skew adjustment can be easily performed, and the change in the amount of spring deflection (spring pressure) can be prevented as a result of the tangential skew adjustment. As a result, the wear strength characteristics of the guide portion and the driving characteristics of the optical pickup can be kept constant, and stable driving characteristics can be realized.

<3. Modification>
As mentioned above, although embodiment of this technique was described concretely, it is not limited to each above-mentioned embodiment, Various deformation | transformation based on the technical idea of this technique is possible.
Further, the configurations, methods, steps, shapes, materials, numerical values, and the like of the above-described embodiments can be combined with each other without departing from the gist of the present technology.
For example, the guided portion 13 is not limited to the configuration in which the plate-shaped portions face each other, but may have a configuration in which rod-shaped projecting portions having a circular or semicircular cross section face each other.

In addition, this technique can also take the following structures.
(1)
An optical pickup having an optical pickup body and a base to which the optical pickup body is attached;
A first guided portion provided on the base and slidably supporting the first guide portion;
A second guided portion provided on the base and slidably supporting the second guide portion;
The first guided portion is a bearing for the first guide portion;
The second guided portion is connected by a connecting portion so that the first guide receiving portion and the second guide receiving portion face each other,
The second guide portion is disposed in a facing space inside the first and second guide receiving portions,
An optical pickup unit in which one outer side of the first and second guide receiving portions is in contact with the base and the other outer side of the first and second guide receiving portions is in contact with a spring member.
(2)
The optical pickup unit according to (1), wherein the first guide receiving portion and the second guide receiving portion have different thicknesses corresponding to different tangential skew correction amounts.
(3)
The light according to (1) or (2), wherein the second guide portion is a protruding portion formed integrally with the mechanical chassis, and the guided portion can be mounted upside down with respect to the base. Pickup unit.
(4)
The optical pickup unit according to (1) or (2), wherein the second guide portion is a shaft attached to a mechanical chassis, and the guided portion can be attached to the base by being reversed in the front-rear direction.
(5)
Each of the first and second guide receiving portions of the second guided portion is provided with an attachment portion having a portion engageable with the attachment location of the base. (1) to (4) The optical pickup unit according to any one of the above.
(6)
A disk table on which an optical disk is mounted;
An optical pickup unit;
A loading mechanism for mounting an optical disc on the disc table;
The optical pickup unit is
An optical pickup having an optical pickup body and a base to which the optical pickup body is attached;
A first guided portion provided on the base and slidably supporting the first guide portion;
A second guided portion provided on the base and slidably supporting the second guide portion;
The first guided portion is a bearing for the first guide portion;
The second guided portion is connected by a connecting portion so that the first guide receiving portion and the second guide receiving portion face each other,
The second guide portion is disposed in a facing space inside the first and second guide receiving portions,
An optical disc drive in which one outer side of the first and second guide receiving portions is in contact with the base and the other outer side of the first and second guide receiving portions is in contact with a spring member.

B ... Base SC ... Adjusting member G ... Guide part SP ... Plate spring 1 ... Optical pickup unit 2 ... Mechanical chassis 3 ... Disc table 4 ... Optical pickup 6.・・ Feeding motor 8 ... Guide shaft 9 ... Guide part 8 ... Negative electrode 11 ... Base 12 ... Bearing part 13 ... Guide part 14 ... U-shaped part 15 ...・

Spring members

21a, 21b ... Plate-

like parts

24a, 24b ... Mounting plates

Claims

An optical pickup having an optical pickup body and a base to which the optical pickup body is attached;
A first guided portion provided on the base and slidably supporting the first guide portion;
A second guided portion provided on the base and slidably supporting the second guide portion;
The first guided portion is a bearing for the first guide portion;
The second guided portion is connected by a connecting portion so that the first guide receiving portion and the second guide receiving portion face each other,
The second guide portion is disposed in a facing space inside the first and second guide receiving portions,
An optical pickup unit in which one outer side of the first and second guide receiving portions is in contact with the base and the other outer side of the first and second guide receiving portions is in contact with a spring member.
The optical pickup unit according to claim 1, wherein the first guide receiving portion and the second guide receiving portion have different thicknesses corresponding to different tangential skew correction amounts.
2. The optical pickup unit according to claim 1, wherein the second guide portion is a protruding portion formed integrally with the mechanical chassis, and the guided portion can be mounted upside down with respect to the base.
2. The optical pickup unit according to claim 1, wherein the second guide portion is a shaft attached to a mechanical chassis, and the guided portion can be attached to the base by being reversed in the front-rear direction.
2. The optical pickup unit according to claim 1, wherein each of the first and second guide receiving portions of the second guided portion is provided with an attachment portion having a portion engageable with an attachment location of the base. .
A disk table on which an optical disk is mounted;
An optical pickup unit;
A loading mechanism for mounting an optical disc on the disc table;
The optical pickup unit is
An optical pickup having an optical pickup body and a base to which the optical pickup body is attached;
A first guided portion provided on the base and slidably supporting the first guide portion;
A second guided portion provided on the base and slidably supporting the second guide portion;
The first guided portion is a bearing for the first guide portion;
The second guided portion is connected by a connecting portion so that the first guide receiving portion and the second guide receiving portion face each other,
The second guide portion is disposed in a facing space inside the first and second guide receiving portions,
An optical disc drive in which one outer side of the first and second guide receiving portions is in contact with the base and the other outer side of the first and second guide receiving portions is in contact with a spring member.