JP2005216344A - Rack for optical pickup module, optical pickup module, and optical disk device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a rack for an optical pickup module, an optical pickup module and an optical disk device which can maintain excellent recording and reproducing characteristics by making a speed when a rack goes to a periphery side from an inner periphery side and a speed when it goes to the inner periphery side from the periphery side equal. <P>SOLUTION: The contact section 12 consists of a board 16 on which a tooth section 15 abutting on a lead screw shaft is set, and both ends of the abutting section 12 are made a constitution connected to a main part 17 of the rack by a U shaped section 18, and a spring 14 is set between the abutting section 12 and the main part 17 of the rack. The abutting section 12, the main part 17 of the rack and the U shape section 18 can be formed into a single piece with resin. Except the area where the U shaped section 18 is set, apertures are prepared at both an upper side and a bottom side of an area between the abutting section 12 and the main part 17 of the rack. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to an optical pickup module rack, an optical pickup module, and an optical disc apparatus that are used when information is recorded on and reproduced from an optical disc by an optical pickup.

  As optical disk devices, CD-ROM, CD-R / RW, DVD, and the like have already been put into practical use, and application to various areas and development for high performance are being actively carried out. Particularly recently, with the rapid market expansion of personal computers, the penetration rate of built-in optical disk devices in personal computers has increased.

  FIG. 4 is a perspective view of a commonly used optical disk apparatus.

  In FIG. 4, reference numeral 1 denotes an optical disk device. The optical disk device 1 includes a housing 2 and a tray 3 held in the housing 2 so as to be able to move in and out. The housing 2 is formed in a bag shape by combining metal housing portions 2 a and 2 b, and the tray 3 is projected and retracted from the opening of the housing 2. An optical pickup module 4 is attached to the tray 3 from the back side. Rails 3 a are provided on both sides of the tray 3 so as to be movable. The rails 3 a are held by rail holding portions 3 b provided integrally with the tray 3.

  The housing part 2a and the housing part 2b are firmly fixed to each other using a locking means and a spiral not shown.

  The optical pickup module 4 has at least a spindle motor 5 for rotating the optical disk, a metal cover 6 provided with an opening 6a from the spindle motor 5 to the outer periphery, and a carriage 7 at least partially exposed from the opening 6a. ing. The carriage 7 is movably held by a plurality of guide shafts provided in the optical pickup module 4, and can be moved toward and away from the spindle motor 5 by a feed motor (not shown). Reference numeral 8 denotes a bezel provided on the front surface of the tray 3, and the bezel 8 is configured to have a size enough to block the opening of the housing 2.

  The carriage 7 includes a light source such as a high-power laser diode, various optical members, and an objective lens that forms a light spot on the optical disk.

  FIG. 5 is a plan view of the optical pickup module 4, and FIG. 6 is a partial perspective view of the optical pickup module 4. The optical pickup module 4 feeds a spindle motor 5 that rotates an optical disk and a carriage 7 that reads an information signal of the optical disk and moves a carriage 7 on which an optical pickup for recording the information signal on the optical disk is moved in the radial direction of the optical disk. Part 9. The feed unit 9 is configured such that the carriage 7 moves between the inner peripheral side and the outer peripheral side of the optical disk by rotating a feed motor.

  Reference numeral 11 denotes a rack, and a contact portion 12 is attached to the rack 11. When the contact portion 12 contacts the lead screw shaft 13 and the rack 11 moves along the lead screw shaft 13, the carriage 7 can move between the inner peripheral side and the outer peripheral side of the optical disk. .

As for the structure of the rack, one relating to an improvement for enabling a high-speed traverse operation is described in (Patent Document 1).
Japanese Patent No. 3245543

  FIG. 7 shows a state in which the contact portion 12 is in contact with the lead screw shaft 13 in the conventional rack. As shown in the drawing of the conventional contact portion in FIG. 8, the contact portion 12 uses a U-shaped hinge, and a tooth portion 15 that contacts the lead screw shaft 13 is provided on the plate 16. . A spring 14 is provided between the contact portion 12 and the rack body 17.

The contact portion 12 converts the rotational motion of the lead screw shaft 13 into motion of the rack 11 parallel to the axial direction of the lead screw shaft 13. In FIG. 8, for example, when the rack 11 moves to the outer peripheral side of the disk, the force in the direction perpendicular to the surface of the tooth portion 15 is applied to the portion A where the lead screw shaft 13 and the contact portion 12 are in contact. The component F ₁ added from 13 and parallel to the axial direction of the lead screw shaft 13 drives the rack 11 in the axial direction of the lead screw shaft 13. However, a component F ₂ perpendicular to the axial direction of the lead screw shaft 13 and parallel to the plate 16 is also generated. Further, for example, when the rack 11 moves to the inner peripheral side of the disk, on the contrary, in the portion B where the lead screw shaft 13 and the contact portion 12 abut, the component parallel to the axial direction of the lead screw shaft 13 F ₃ drives the rack 11 in the axial direction of the lead screw shaft 13. However, a component F _{4 that} is perpendicular to the axial direction of the lead screw shaft 13 and parallel to the plate 16 is also generated.

Therefore, when the rack 11 moves along the lead screw shaft 13, force F ₂ or F ₄ acts on the tooth portion 15 from the lead screw shaft 13, and the contact portion 12 is deformed. The rack 11 is different from the inner periphery side toward the outer periphery side and from the outer periphery side toward the inner periphery side.

FIG. 9 shows a deformation pattern of the contact portion of the conventional optical pickup module rack at this time. Since the contact portion 12 and the connecting portion 19 of the rack body 17 are on the lower side in the figure and not on the upper side, when the rack 11 is directed from the outer peripheral side to the inner peripheral side, An upward force F ₄ acts, and the connecting portion 19 serves as a hinge to serve as a fulcrum during deformation. As a result, as shown in FIG. 9A, the upper side of the contact portion 12 is smoothly deformed in a direction approaching the rack body 17. When this deformation occurs, the spring 14 provided between the two surfaces applies a certain restoring force based on the deformation, so that the deformation can be eliminated, and the rack 11 can move smoothly.

On the other hand, when the rack 11 is directed from the inner peripheral side to the outer peripheral side, a downward force F ₂ is applied to the tooth portion 15 of the contact portion 12, and the connecting portion 19 cannot function as a hinge. As shown in FIG. 9B, the contact portion 12 is deformed in a direction to be pushed downward. When deformed in this way, the rack part bites in, the reaction force due to the buckling deformation of the hinge part acts directly on the screw shaft 13, the pressing force of the rack 11 on the screw shaft 13 increases, and the deformation is eliminated depending on the spring 14. This is not possible, and the rack 11 is caught when trying to move, and cannot move smoothly.

Thus, since the deformation pattern of the contact portion 12 is different between when the rack 11 is directed from the outer peripheral side to the inner peripheral side and when it is directed from the inner peripheral side to the outer peripheral side, the rack 11 is changed from the outer peripheral side to the inner peripheral side. A situation occurs in which the speed when traveling toward the circumferential side and the speed when traveling from the inner circumferential side toward the outer circumferential side are different. This problem is particularly noticeable with the use of the small rack 11 as the size of the optical disk apparatus is further reduced. In order to accurately record and reproduce information in the optical disc apparatus, it is necessary to maintain the carriage moving speed relative to the optical disc. If there is variation in the carriage moving speed, the recording and reproducing characteristics of the optical disc apparatus will be affected. Adversely affect.

  The present invention was made to solve the above-described problem, and the speed when the rack is directed from the inner peripheral side to the outer peripheral side and the speed when the rack is directed from the outer peripheral side to the inner peripheral side are made equal. An object of the present invention is to provide an optical pickup module and an optical disc apparatus capable of maintaining good recording / reproducing characteristics.

  The present invention has been made to solve the above-described problems, and is used so that an optical pickup for recording and reproducing information by irradiating a laser beam to an optical disk moves in the radial direction of the optical disk. An optical pickup module rack comprising a contact portion that contacts the shaft and a rack body, wherein the contact portion and the rack body are arranged to face each other, and an elastic member is provided therebetween. A rack for an optical pickup module, wherein the deformed shape of the elastic member when an upward external force is applied to the contact portion and the deformed shape of the elastic member when a downward external force is applied are substantially the same. It is.

  When a force with a component that pushes the contact portion upward is applied when the rack moves from the outer periphery side to the inner periphery side of the optical disk, the upper portion of the contact portion is deformed in a direction approaching the rack body, and this deformation is an elastic member. It can be solved by the restoring force. On the other hand, when a force acts in a direction to push the abutting portion downward when the rack moves from the inner peripheral side to the outer peripheral side, the lower side of the abutting portion is deformed in a direction approaching the rack body, and this deformation is elastic. It can be eliminated by the restoring force of the member. Therefore, in any case, the deformation of the contact portion due to the force applied to the contact portion can be eliminated by the restoring force of the elastic member, and when the rack moves from the inner peripheral side to the outer peripheral side. And in any case when going from the outer peripheral side to the inner peripheral side, it can be performed smoothly.

  According to the present invention, the rack can be smoothly moved both in the case of moving from the inner peripheral side of the optical disk to the outer peripheral side and in the case of moving from the outer peripheral side to the inner peripheral side, and good recording / reproducing characteristics are achieved. It is possible to realize an optical pickup module and an optical disc apparatus that can maintain the above.

  According to a first aspect of the present invention, an optical pickup that records and reproduces information by irradiating an optical disc with laser light is used so as to move in the radial direction of the optical disc, and a contact portion that contacts the lead screw shaft And an optical pickup module rack comprising a rack body, wherein the abutting portion and the rack body are arranged to face each other, and an elastic member is provided therebetween, with the abutting portion facing upward The rack for an optical pickup module is characterized in that the deformed shape of the elastic member when an external force is applied is substantially equal to the deformed shape of the elastic member when a downward external force is applied.

When a force with a component that pushes the contact portion upward is applied when the rack moves from the outer periphery side to the inner periphery side of the optical disk, the upper portion of the contact portion is deformed in a direction approaching the rack body, and this deformation is an elastic member. It can be solved by the restoring force. On the other hand, when a force acts in a direction to push the abutting portion downward when the rack moves from the inner peripheral side to the outer peripheral side, the lower side of the abutting portion is deformed in a direction approaching the rack body, and this deformation is elastic. It can be eliminated by the restoring force of the member. Therefore, in any case, the deformation of the contact portion due to the force applied to the contact portion can be eliminated by the restoring force of the elastic member, and when the rack moves from the inner peripheral side to the outer peripheral side. And in any case when going from the outer peripheral side to the inner peripheral side, it can be performed smoothly.

  The invention according to claim 2 of the present invention is used for moving an optical pickup for recording and reproducing information by irradiating a laser beam to an optical disc in the radial direction of the optical disc, and a contact portion that contacts the lead screw shaft And an optical pickup module rack including a rack body, wherein the abutting portion and the rack body are arranged to face each other, and an elastic member is provided therebetween, and the elastic member is substantially vertically An optical pickup module rack characterized by having a symmetrical shape.

  When the elastic member has a substantially vertical symmetrical shape, when the rack has a component that pushes upward when it moves from the outer peripheral side to the inner peripheral side, it is lowered when the rack moves from the inner peripheral side to the outer peripheral side. Even when a force acts in the direction of pushing down to the side, the deformation of the contact portion due to the force applied to the contact portion can be eliminated by the restoring force of the elastic member, and the movement of the rack is changed from the inner peripheral side to the outer peripheral side. It is possible to carry out smoothly both in the case of going to and the case of going from the outer peripheral side to the inner peripheral side.

  The invention according to claim 3 of the present invention is used to move an optical pickup for recording and reproducing information by irradiating a laser beam to an optical disc in the radial direction of the optical disc, and a contact portion that contacts the lead screw shaft And an optical pickup module rack comprising a rack body, wherein the abutting portion and the rack body are arranged to face each other, and an elastic member is provided between the abutting portion and the rack body, The optical pickup module rack is characterized in that both the upper side and the lower side of the area between the rack main body are open.

  Since both the upper and lower sides of the region between the abutting portion and the rack body are open, when a vertical force is applied to the tooth portion that abuts the lead screw shaft, the fulcrum that deforms is Because it is at both ends of the abutment, even when a force with a component that pushes upward when the rack moves from the outer peripheral side to the inner peripheral side, it pushes down when the rack moves from the inner peripheral side to the outer peripheral side. Even when the force acts on the, even if the deformation method is the same or different, the difference is vertically symmetrical. Therefore, in any case, the deformation of the contact portion due to the force applied to the contact portion can be eliminated by the restoring force of the elastic member, and when the rack moves from the inner peripheral side to the outer peripheral side. And in any case when going from the outer peripheral side to the inner peripheral side, it can be performed smoothly.

  The invention according to claim 4 of the present invention is used to move an optical pickup for recording and reproducing information by irradiating a laser beam to an optical disc in the radial direction of the optical disc, and a contact portion that contacts the lead screw shaft And an optical pickup module rack comprising a rack body, wherein the abutting portion and the rack body are arranged to face each other, and an elastic member is provided between the abutting portion and the rack body, The rack for an optical pickup module is characterized in that the rack body is connected to each other by U-shaped portions at both ends.

  Since the abutting portion and the rack body are connected to each other by U-shaped portions at both ends, the region between the abutting portion and the rack body is located above and below the region other than the region where the U-shaped portion is provided. An opening can be provided, and the rack can be smoothly moved in any case from the inner circumference side to the outer circumference side and from the outer circumference side to the inner circumference side.

The invention according to claim 5 of the present invention is used to move an optical pickup for recording and reproducing information by irradiating a laser beam to an optical disc in the radial direction of the optical disc, and a contact portion that contacts the lead screw shaft And an optical pickup module rack comprising a rack body, wherein the abutment portion and the rack body are arranged to face each other, and an elastic member is provided between the abutment portion and the rack body. The rack for an optical pickup module is characterized in that the rack main body is connected at both ends by connecting portions.

  Since the contact portion and the rack main body are connected at both ends by the connecting portion, an opening can be provided on both the upper side and the lower side of the region between the contact portion and the rack main body, and the rack can be moved. In both cases, when going from the inner circumference side to the outer circumference side and when going from the outer circumference side to the inner circumference side, it can be performed smoothly.

  The invention according to claim 6 of the present invention is used to move an optical pickup that records and reproduces information by irradiating a laser beam to an optical disc in the radial direction of the optical disc, and a contact portion that contacts the lead screw shaft. And an optical pickup module rack comprising a rack body, wherein the abutting portion and the rack body are arranged to face each other, and an elastic member is provided between the abutting portion and the rack body, The optical pickup module rack is characterized in that a space between the rack main body is filled with a plate-like elastic body, and the contact portion and the rack main body are connected by the elastic body.

  When the space between the contact part and the rack body is filled with a plate-like elastic body, the rack moves from the inner peripheral side to the outer peripheral side and from the outer peripheral side to the inner peripheral side. In either case, it can be performed smoothly.

  A seventh aspect of the present invention is an optical pickup module using the optical pickup module rack according to the first to sixth aspects of the present invention, and the movement of the optical pickup is changed from the inner peripheral side to the outer peripheral side of the optical disc. It is possible to carry out smoothly both in the case of going to and the case of going from the outer peripheral side to the inner peripheral side. Therefore, the recording / reproducing quality of information can be improved.

  The invention according to claim 8 of the present invention is an optical disk device on which the optical pickup module according to the invention of claim 7 is mounted, and an optical disk device with improved information recording / reproducing quality can be realized.

  The optical pickup module rack of the present invention will be described below based on the embodiments.

(Embodiment 1)
FIG. 1 is a diagram showing an optical pickup module rack according to Embodiment 1 of the present invention.

  In FIG. 1, the abutting portion 12 includes a plate 16 provided with tooth portions 15 that abut on the lead screw shaft 13, and both ends of the abutting portion 12 are connected to the rack body 17 by U-shaped portions 18. A spring 14 is provided between the contact portion 12 and the rack body 17. The contact part 12, the rack body 17, and the U-shaped part 18 can be integrally formed of resin.

As shown in FIG. 9, the contact portion 12 has a different deformation pattern when the rack 11 goes from the inner peripheral side to the outer peripheral side and when the rack 11 goes from the outer peripheral side to the inner peripheral side. Is an improvement. That is, the conventional contact portion has a U-shaped hinge in the vicinity of the tooth portion 15 and has an opening on the upper side but no opening on the lower side, and is not symmetrical in the vertical direction. . Therefore, when a force having a component that pushes upward is applied as indicated by F ₄ in FIG. 9A and when a force is exerted in a downward direction as indicated by F ₂ in FIG. 9B. In other words, the method of deformation is different.

  In the present embodiment, by making the contact portion 12 have the above-described shape, the upper and lower sides of the region between the contact portion 12 and the rack body 17 except the region where the U-shaped portion 18 is provided. Both have openings. Therefore, when a force having a component that pushes upward when the rack 11 moves from the outer peripheral side to the inner peripheral side, the upper side of the plate 16 is deformed in a direction approaching the rack body 17, and this deformation is a restoring force by the spring 14. Can be solved. On the other hand, when a force having a component that pushes down when the rack 11 moves from the inner peripheral side to the outer peripheral side, the lower side of the plate 16 is deformed in a direction approaching the rack body 17, and this deformation is caused by the spring 14. It can be solved by restoring power. Accordingly, in any case, the deformation of the plate 16 due to the force applied to the plate 16 can be eliminated by the restoring force of the spring 14, and the movement of the rack 11 is directed from the inner peripheral side to the outer peripheral side. In any case, when going from the outer peripheral side to the inner peripheral side, it can be performed smoothly.

(Embodiment 2)
FIG. 2 is a view showing an optical pickup module rack according to Embodiment 2 of the present invention.

  In FIG. 2, the contact portion 12 includes a plate 16 provided with a tooth portion 15 that contacts the lead screw shaft 13, and the contact portion 12 and the rack body 17 are connected to each other by a loop-shaped connecting portion 19. A spring 14 is provided between the plate 16 and the rack body 17. The abutting part 12, the rack body 17, and the connecting part 19 can be integrally formed of resin.

  In the present embodiment, the contact portion 12 is formed in the above-described shape so that an opening is provided on both the upper side and the lower side of the region between the contact portion 12 and the rack body 17. The shape is symmetrical in the vertical direction. Similarly, when a vertical force is applied to the tooth portion 15 in contact with the lead screw shaft 13, the deforming fulcrums are at both ends of the contact portion 12, so that the rack 11 moves upward from the outer peripheral side toward the inner peripheral side. Even when a force with a component that pushes up is applied to the rack 11 or when a force is applied in a downward direction when the rack 11 moves from the inner circumference side to the outer circumference side, the difference in the vertical symmetry is the same or different even if the deformation method is the same or different. Become. Therefore, the load on the rotational drive of the lead screw shaft 13 due to the deformation of the rack 11 is the same whether the rack 11 is directed from the inner peripheral side to the outer peripheral side or from the outer peripheral side to the inner peripheral side.

  In the present embodiment, the connecting portions 19 are provided at both ends of the rack 11 in the moving direction, but may be provided at both ends in the direction perpendicular to the moving direction of the rack 11, that is, above and below the rack 11. Also in this way, the shape of the connecting portion 19 is vertically symmetrical, and whether the rack 11 is directed from the inner peripheral side to the outer peripheral side or from the outer peripheral side to the inner peripheral side, the deformation method may be the same or different. It becomes a vertically symmetrical difference. Therefore, the load on the rotational drive of the lead screw shaft 13 due to the deformation of the rack 11 is the same whether the rack 11 is directed from the inner peripheral side to the outer peripheral side or from the outer peripheral side to the inner peripheral side. However, in this case, the vertical dimension of the rack 11 is increased by the connecting portion 19.

(Embodiment 3)
FIG. 3 is a view showing an optical pickup module rack according to Embodiment 3 of the present invention.

In FIG. 3, the contact portion 12 includes a plate 16 provided with a tooth portion 15 that contacts the lead screw shaft 13, and the rack is formed by a plate-like elastic body 20 that fills a space between the plate 16 and the rack body 17. The main body 17 is connected. Although the elastic body 20 will not be specifically limited if it has elasticity, For example, it can form with rubber | gum.

  In the present embodiment, the plate 16 and the rack body 17 are connected by a plate-like elastic body 20, and no connection portion is provided at the end of the plate 16. Accordingly, when a force having a component that pushes upward when the rack 11 is moved from the outer peripheral side to the inner peripheral side, a force is applied in a downward direction when the rack 11 is moved from the inner peripheral side to the outer peripheral side. However, even if the deformation is the same or different, it is a vertically symmetrical difference. Therefore, the load on the rotational drive of the lead screw shaft 13 due to the deformation of the rack 11 is the same whether the rack 11 is directed from the inner peripheral side to the outer peripheral side or from the outer peripheral side to the inner peripheral side.

  The structure of the rack for the optical pickup module according to the present invention is not limited to that described above, and the abutting portion 12 and the rack body 17 are arranged to face each other, and an elastic member is provided therebetween. As long as both the upper side and the lower side of the region between the contact part 12 and the rack body 17 are open, the connection means between the contact part 12 and the rack body 17 is the other It may be a thing.

  Further, if the shape of the connecting portion between the abutting portion 12 and the rack body 17 is vertically symmetric, even if the manner of deformation is the same or different, the difference is vertically symmetric. Also good. Further, even when the shape of the connecting portion between the contact portion 12 and the rack body 17 is not vertically symmetric, when the upward external force parallel to the contact portion 12 is applied to the tooth portion 15, the contact portion 12. If the relationship between the external force and the amount of deformation of the rack 11 when a downward external force parallel to the tooth portion 15 is applied is the same, the rack 11 moves from the outer peripheral side to the inner periphery even when going from the inner peripheral side to the outer peripheral side. Also in the case of going to the side, the load on the rotational drive of the lead screw shaft 13 due to the deformation of the rack 11 is equal, and the same effect can be obtained.

  INDUSTRIAL APPLICABILITY The present invention can be used as an optical disk device that records and reproduces information on an optical disk using an optical pickup. The speed at which the optical pickup moves from the outer peripheral side to the inner peripheral side of the optical disk, and the inner peripheral side to the outer peripheral side of the optical disk. The speed when moving to can be made equal, and the recording / reproducing quality can be improved.

The figure which shows the rack for optical pick-up modules which concerns on Embodiment 1 of this invention. The figure which shows the rack for optical pick-up modules which concerns on Embodiment 2 of this invention. The figure which shows the rack for optical pick-up modules which concerns on Embodiment 3 of this invention. Perspective view of optical disk device Plan view of optical pickup module Partial perspective view of optical pickup module The figure which shows a mode that the contact part is contacting the lead screw shaft in the conventional rack. The figure which shows the conventional contact part The figure which shows the deformation pattern of the contact part of the rack for conventional optical pick-up modules

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Optical disk apparatus 2 Housing | casing 2a, 2b Housing | casing part 3 Tray 3a Rail 3b Rail holding part 3c Opening 4 Optical pick-up module 5 Spindle motor 6 Cover 6a Opening 7 Carriage 8 Bezel 9 Feed part 12 Contact part 13 Lead screw shaft 14 Spring 15 tooth portion 16 plate 17 rack body 18 U-shaped portion 19 connecting portion 20 elastic body

Claims (8)

An optical pickup module that is used so that an optical pickup that records and reproduces information by irradiating a laser beam to an optical disc moves in the radial direction of the optical disc, and includes an abutting portion that abuts on a lead screw shaft and a rack body The rack is a structure in which the abutting portion and the rack main body are arranged to face each other, and an elastic member is provided therebetween, and the elastic member when an upward external force is applied to the abutting portion The rack for an optical pickup module is characterized in that the deformed shape of the elastic member is substantially equivalent to the deformed shape when a downward external force is applied. An optical pickup module that is used to move an optical pickup that records and reproduces information by irradiating a laser beam to an optical disk in the radial direction of the optical disk, and includes a contact portion that contacts the lead screw shaft and a rack body The rack is a configuration in which the abutting portion and the rack main body are arranged to face each other and an elastic member is provided therebetween, and the elastic member has a substantially vertically symmetrical shape. Rack for optical pickup module. An optical pickup module that is used to move an optical pickup that records and reproduces information by irradiating a laser beam to an optical disk in the radial direction of the optical disk, and includes a contact portion that contacts the lead screw shaft and a rack body The rack is configured such that the contact portion and the rack main body are arranged to face each other, and an elastic member is provided therebetween, and an upper side of a region between the contact portion and the rack main body, An optical pickup module rack characterized in that all of the lower sides are open. An optical pickup module that is used to move an optical pickup that records and reproduces information by irradiating a laser beam to an optical disk in the radial direction of the optical disk, and includes a contact portion that contacts the lead screw shaft and a rack body Rack, wherein the abutting portion and the rack main body are arranged to face each other, and an elastic member is provided therebetween, and the abutting portion and the rack main body are U-shaped at both ends. A rack for an optical pickup module, which is connected by parts. An optical pickup module that is used to move an optical pickup that records and reproduces information by irradiating a laser beam to an optical disk in the radial direction of the optical disk, and includes a contact portion that contacts the lead screw shaft and a rack body Rack, wherein the abutting portion and the rack main body are arranged to face each other, and an elastic member is provided therebetween, and the abutting portion and the rack main body are connected to each other at both ends. A rack for an optical pickup module, characterized in that the racks are connected together. An optical pickup module that is used to move an optical pickup that records and reproduces information by irradiating a laser beam to an optical disk in the radial direction of the optical disk, and includes a contact portion that contacts the lead screw shaft and a rack body The rack is configured such that the abutting portion and the rack main body are arranged to face each other, and an elastic member is provided therebetween, and a space between the abutting portion and the rack main body is plate-shaped. A rack for an optical pickup module, wherein the contact portion and the rack body are connected by the elastic body. An optical pickup module using the optical pickup module rack according to any one of claims 1 to 6. An optical disk device comprising the optical pickup module according to claim 7.

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