JP2006114098A - Optical disk device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To realize cost reduction and simplification of assembly by eliminating a fastening component for fixing an optical pickup to a feed rack. <P>SOLUTION: In a configuration of the optical disk device, a holding section, which is made elastic for preventing rattling between an optical pickup 3 and a feed rack 4, is formed in the feed rack 4, thereby the optical pickup 3 is positioned and held in directions A and B; a hook is formed in the holding section, thereby the pickup can be positioned and held also in directions C and D; a positioning pin for positioning and holding the pickup is formed in the feed rack 4; and a feed gear 5 is pressed to the pickup 3 by using elasticity of resin in a rack portion for absorbing engagement rattling between the feed gear 5 and the feed rack 4, thereby the optical pickup 3 is fixed to the feed rack 4 without the fastening component. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to an optical disc apparatus having a simple structure by reducing the number of parts.

  A pickup driving mechanism for recording / reproducing on / from an optical disc includes a guide for sliding the optical pickup from the inner periphery to the outer periphery of the optical disc, an optical pickup, a feed rack fastened and fixed to the optical pickup, and a feed gear for driving the feed rack. ing. For recording and reproduction of an optical disc, it is necessary to control the feed amount of the optical pickup with high accuracy, and a structure for absorbing the meshing between the feed gear and the feed rack is required. Normally, the rack portion of the feed rack is formed of resin, and the amount of meshing on the pitch line is increased by utilizing the deflection of the rack portion due to the elasticity of the resin to absorb the meshing. Furthermore, in order to control the feed amount of the optical pickup with high accuracy, it is necessary to fix the optical pickup and the feed rack, and fastening parts are used.

However, the fixing method using the fastening parts has a problem in simplifying the assembly, for example, increasing the number of work steps and requiring tightening torque management of the fastening parts.
Japanese Unexamined Patent Publication No. 2000-222803 (page 5-19, FIG. 9)

  In the conventional configuration, in order to accurately control the feed amount of the optical pickup, the feed rack for fixing and holding the optical pickup and the optical pickup is fixed by fastening parts. The problem to be solved is work and management of work by fastening parts that are obstacles to simplifying the assembly.

  In the present invention, an optical pickup is slidably supported on a guide shaft, a feed rack attached to the optical pickup is engaged with a feed gear, and the optical pickup is guided through the feed rack by rotating the feed gear forward and backward. In an optical disk apparatus that is configured to slide-feed along a shaft, the feed rack is held and fixed to the optical pickup by a pin for positioning the feed rack, a positioning arm that is positioned and held in the slide direction of the optical pickup, and a hook of the positioning arm. It is characterized by that. In the above configuration, the optical disk is placed on the turntable, the turntable is rotated, the feed gear is rotated forward and backward, and the optical pick is slid through the feed rack to be stored on the disk by the optical pickup. The recorded information is reproduced, recorded or erased. In this case, the positioning of the optical pickup in the sliding direction is performed by the elastic positioning arm of the feed rack, and the positioning in the direction orthogonal to the sliding direction is performed by the engagement of the feed rack positioning pin, the feed gear, and the feed rack. This is done by pressing the elastic rack part that absorbs light, and the two-way positioning is prevented by the hooks that are configured on the positioning arm of the feed rack, and the optical pickup and the feed rack are held and fixed. Can be done easily without any parts. In the present invention, the feed rack is optically driven by the elasticity of the rack portion that absorbs the engagement between the feed gear and the feed rack, with the hook of the positioning arm that holds and holds the optical pickup configured in the feed rack as a rotation center. It is configured to be pressed by the pickup, and is characterized in that the holding and fixing of the optical pickup and the feed rack are not removed. In the case of the said structure, it can be set as the structure fixed without a fastening component. Further, according to the present invention, a hole having a size larger than the guide shaft diameter and the diameter of the holding hole of the optical pickup is formed in the positioning arm of the feed rack, and the guide shaft is inserted into the hole and the holding hole of the optical pickup. Even when a load is applied, the optical pickup and the feed rack are not disengaged from each other. In the case of the above configuration, even when the feed rack is pressed against the optical pickup around the rack retaining hook by using the elasticity of the rack portion of the feed rack, the optical pickup can be accurately used without causing a load on the optical pickup. You can slide.

  In the present invention, positioning of the optical pickup in the sliding direction is performed by the elastic positioning arm of the feed rack, and positioning in the direction perpendicular to the sliding direction is achieved by the engagement of the feed rack positioning pin, the feed gear, and the feed rack. This is done by pressing the elastic rack part that absorbs light, and the two-way positioning is prevented by the hooks that are configured on the positioning arm of the feed rack, and the optical pickup and the feed rack are held and fixed. Can be done easily without any parts.

  The feed rack is pressed against the optical pickup by the elasticity of the rack portion that absorbs the meshing between the feed gear and the feed rack with the hook of the positioning arm that holds and holds the optical pickup configured in the feed rack as a rotation center. It can be configured to be fixed without fastening parts.

  Furthermore, an abnormal load is applied by forming a hole having a size larger than the guide shaft diameter and the diameter of the holding hole of the optical pickup in the positioning arm of the feed rack and inserting the guide shaft into the hole and the holding hole of the optical pickup. In this case, the optical pickup and the feed rack are configured so that the engagement between the optical pickup and the feed rack is not disengaged. The elasticity of the rack portion of the feed rack is used to press the feed rack against the optical pickup around the rack retaining hook. Even in this case, the optical pickup can be slid with high precision without being a load of feeding the optical pickup, and the fixing of the optical pickup and the feeding rack by the fastening parts can be abolished, and the work man-hours and tightening torque management of the fastening parts can be simplified. There is an advantage.

  The invention according to claim 1 of the present invention includes an optical pickup that records or reproduces a signal on a recording medium, and a guide shaft that holds and guides the optical pickup so as to be slidable in a radial direction of the recording medium. A feed rack attached to the optical pickup, a feed gear that meshes with the feed rack and drives the feed rack in the radial direction of the recording medium, and the optical pickup provided in the feed rack is orthogonal to the slide direction. A pin for positioning in the direction, a positioning arm provided on the feed rack for positioning and holding the optical pickup in the sliding direction, a hook protruding from the positioning arm for positioning in the optical axis direction of the optical pickup, and the feed A rack which is provided in a rack and meshes with the feed gear and has elasticity in a direction to mesh with the feed gear The provided is for holding and fixing the feed rack to the optical pickup.

  The invention according to claim 2 is based on the elasticity of the rack portion that absorbs the meshing between the feed gear and the feed rack, with the hook of the positioning arm that holds and holds the optical pickup configured in the feed rack as a rotation center. The feed rack is configured to be pressed by the optical pickup so that the optical pickup and the feed rack are not held and fixed.

  According to a third aspect of the present invention, a hole having a size larger than the guide shaft diameter and the diameter of the holding hole of the optical pickup is formed in the positioning arm of the feed rack, and the guide shaft is inserted into the hole and the holding hole of the optical pickup. Thus, even when an abnormal load is applied, the optical pickup is not disengaged from the feed rack. In the case of the above configuration, even when the feed rack is pressed against the optical pickup around the rack retaining hook by using the elasticity of the rack portion of the feed rack, the optical pickup can be accurately used without causing a load on the optical pickup. It can slide.

  According to a fourth aspect of the present invention, there is provided an optical pickup that records or reproduces a signal on a recording medium, a guide shaft that holds and guides the optical pickup in a radial direction of the recording medium, and the optical pickup. A feed rack attached to the pickup; and a feed gear that meshes with the feed rack and drives the feed rack in a radial direction of the recording medium. The radial direction of the recording medium is a first direction, and the light of the optical pickup When the axial direction is defined as the second direction, and the direction orthogonal to the first and second directions is defined as the third direction, a pin provided in the feed rack for positioning in the third direction of the optical pickup; A positioning arm provided on the feed rack for positioning the optical pickup in a first direction, and a second direction of the optical pickup protruding from the positioning arm. Those having a hook for positioning.

  That is, in the optical disk apparatus of the present invention, positioning of the optical pickup in the slide direction is performed by the elastic positioning arm of the feed rack, and positioning in the direction orthogonal to the slide direction is performed by the pin, feed gear, and feed rack for positioning the feed rack. This is done by pressing the elastic rack part that absorbs the engagement of the racks, and the two-way positioning is prevented by the hooks that are formed on the positioning arm of the feed rack. The feed rack is fixed. Further, the hook configured on the positioning arm portion is set as the rotation center, and the feed rack is pressed against the optical pickup by the rack portion elasticity of the feed rack, so that the feed rack is not detached from the optical pickup. Furthermore, the positioning arm portion of the feed rack is formed with a hole having a size larger than the diameter of the guide shaft and the diameter of the holding hole of the optical pickup, and an abnormal load is caused by inserting the guide shaft into the hole and the holding hole of the optical pickup. Even in the event of an overload, the optical pickup and feed rack are not disengaged from each other, eliminating the need for fastening of the optical pickup and feed rack by fastening parts, reducing the number of work processes and reducing the number of fastening parts. The tightening torque management was abolished, and it was realized without impairing the performance of the optical disc apparatus that accurately controls the feed amount of the optical pickup during recording and reproduction of the optical disc.

(Embodiment 1)
Hereinafter, embodiments of the present invention will be described with reference to the drawings. 1 is an exploded perspective view showing a component structure of an embodiment of the apparatus of the present invention, FIG. 2 is an enlarged perspective view of the vicinity of the optical pickup in FIG. 1, FIG. 3 is a plan view after the apparatus is assembled, and FIG. FIG. 5 is a side view seen from the direction of the arrow Z in FIG. 4, FIG. 6 is a side view seen from the direction of the arrow Y in FIG. 4, and the optical pickup 3 is easy to understand. And the rack 4 vicinity was shown in the cross section (cross section of the XX part of FIG. 4).

  In the figure, 7 is a disk which is a recording medium on which various signals are recorded, 3 is an optical pickup for recording / reproducing signals on / from the disk 7, and is composed of a lens, a laser diode, etc., 1 is a traverse base, 2 Is a guide shaft for guiding the optical pickup 3 and the rack 4 in the radial direction of the disk 7, and 3a is a guide shaft penetrating portion formed in the optical pickup 3 and penetrating and holding the guide shaft 2. The guide shaft penetrates parallel to the moving direction of the optical pickup 3. A hole 9 is provided and the guide shaft 2 is inserted. 3b is a positioning hole provided in the optical pickup 3, and positioning pins 4d and 4e, which will be described later, engage with each other to position the optical pickup 3 with respect to the rack 4. 5 is a feed gear that is rotationally driven by a separately provided motor. 5 is a rack body of the feed rack 4 that meshes with the feed gear 5 and is provided with a long hole in the vicinity thereof as shown in the figure. Is elastically deformed in the directions of arrows E and F. Reference numerals 4b and 4c are positioning arms provided in two places on the feed rack 4, and are provided with through holes 8 through which the guide shaft 2 is inserted. The guide shaft penetrating portion 3a of the optical pickup 3 is positioned between the positioning arms 4b and 4c, and is held by the elastic force in the opposing direction of the positioning arms 4b and 4c. 4d and 4e are positioning pins 4f and 4g which are provided in the feed rack 4 and engage with the positioning holes 3b of the optical pickup 3, and 4f and 4g are hooks provided on the upper portions of the facing arms of the positioning arms 4b and 4c of the feed rack 4, The guide shaft penetrating portion 3a is positioned in the directions of arrows C and D. In order to easily engage the guide shaft penetrating portion 3a with the positioning arms 4b and 4c, a taper may be provided on the upper portions of the hooks 4f and 4g. Reference numeral 6 denotes a turntable on which the disk 7 is placed and rotated.

  In FIG. 2, the directions of arrows A and B are orthogonal to the first direction, and the directions of arrows C and D parallel to the optical axis direction of the lens of the optical pickup 3 are orthogonal to the second direction and the first and second directions. The directions of arrows E and F are defined as the third direction.

  Regarding the present embodiment configured as described above, the assembly configuration and the configuration after assembly will be described below.

  An optical pickup 3 is slidably supported on the guide shaft 2, and a feed rack 4 attached to the optical pickup 3 is engaged with a feed gear 5. By rotating the feed gear 5 forward and backward, light is transmitted through the feed rack 4. The pickup 3 is configured to slide-feed along the guide shaft 2.

  The optical disk 7 is placed on the turntable 6, and the turntable 6 is rotated and the feed gear 5 is rotated forward and backward to slide the optical pick 3 through the feed rack 4. Information stored in the disk 7 is reproduced, recorded or erased.

  The rack 4 is made of a resin molded product. As shown in FIGS. 2 and 4 to 6, the rack body 4 a parallel to the guide shaft 2 and a pair of positioning arms 4 b and 4 c projecting from both ends of the rack body 4 a. And hooks 4f and 4g project from the positioning arms 4b and 4c, respectively.

  As shown in FIG. 5, the positioning arms 4b and 4c sandwich the guide shaft penetrating portion 3a of the optical pickup 3 using its resin elasticity to position the feed rack 4 in the A and B directions, and the hooks 4f and 4g. Positioning in the C and D directions is also performed.

  The rack 4 has two positioning pins 4d and 4e protruding from both ends of the rack body 4a as shown in FIGS. 5 to 6, and is fitted with the positioning holes 3b of the optical pickup 3. In addition, positioning in the E and F directions is performed by being pressed in the F direction by the reaction force of the resin elasticity of the rack body 4a due to the meshing of the rack body 4a and the feed gear 5.

  According to the above configuration, the optical pickup 3 is positioned in the sliding direction by the elastic positioning arms 4b and 4c of the feed rack 4, and the positioning in the direction orthogonal to the sliding direction is performed by the positioning pins 4d and 4e, the feed gear 5, and the feed rack are pressed by an elastic rack 4a that absorbs the contact between the hooks 4f and 4g formed on the feed rack 4. Thus, the optical pickup 3 and the feed rack 4 can be easily held and fixed without any fastening parts.

  As shown in FIGS. 5 and 6, the rack 4 has the rack body 4 a disposed on the C surface side of the optical pickup 3 and the hooks 4 f and 4 g disposed on the D surface side of the optical pickup 3. 5 is pressed in the G direction of the optical pickup 3 with the hooks 4f and 4g positioning the optical pickup 3 and the feed rack 4 in the C and D directions as the center of rotation due to the resin elastic reaction force of the rack body 4a. The According to the above configuration, the optical pickup 3 and the feed rack 4 can be easily held and fixed without fastening parts.

  Further, as shown in FIG. 6, the rack 4 is inserted into the rack positioning arms 4 b and 4 c and the through holes 8 and 9 penetrating the guide shaft through portion 3 a of the optical pickup 3, thereby inserting the guide shaft 2 into the rack 4. Since the guide shaft 2 is slidably held, even when an abnormal force is generated in the feed rack 4 due to an impact such as dropping, the feed rack 4 and the optical pickup 3 are not disengaged.

  Further, since the diameter of the through hole 8 of the feed rack 4 is set larger than the diameter of the guide shaft through hole 9 of the optical pickup 3, even when the rack positioning arms 4b and 4c are bent by resin elasticity, The through holes 8 and 9 are not clogged relative to the guide shaft 2. According to the above configuration, the optical pickup 3 and the feed rack 4 are configured not to be disengaged even when an abnormal load is applied, and the elasticity of the rack portion of the feed rack 4 is utilized. Even when the feed rack 4 is pressed against the optical pickup 3 around the retaining hook, the optical pickup 3 can be slid with high accuracy without being loaded on the optical pickup 3, and the optical pickup and the feed rack are fixed by fastening parts. Can be abolished, simplifying the work man-hours and tightening torque management of fastening parts.

  In the optical disk apparatus according to the present invention, positioning of the optical pickup in the sliding direction is performed by the elastic positioning arm of the feed rack, and positioning in the direction perpendicular to the sliding direction is performed by the pin, the feed gear, and the feed rack for positioning the feed rack. This is done by pressing the elastic rack part that absorbs the mesh, and the two-way positioning is prevented by the hook configured on the positioning arm of the feed rack. The feed rack is fixed. Further, the hook configured on the positioning arm portion is set as the rotation center, and the feed rack is pressed against the optical pickup by the rack portion elasticity of the feed rack, so that the feed rack is not detached from the optical pickup. Furthermore, the positioning arm portion of the feed rack is formed with a hole having a size larger than the diameter of the guide shaft and the diameter of the holding hole of the optical pickup, and an abnormal load is caused by inserting the guide shaft into the hole and the holding hole of the optical pickup. Even when the optical pickup is applied, the optical pickup and the feed rack are not disengaged from each other, so that the rack portion of the feed rack is a separate spring to accurately control the optical pickup feed amount during recording and reproduction of the optical disk. Can be applied to an optical pickup feed mechanism that absorbs the meshing loss between the feed gear and the feed rack.

FIG. 3 is a perspective view of the component configuration of the optical disc apparatus according to the embodiment of the present invention. Partial perspective view of FIG. 1 in the same embodiment Assembly plan view of optical disc apparatus according to an embodiment of the present invention Partial plan view of FIG. 3 in the same embodiment Partial left side view of FIG. 3 in the same embodiment Partial bottom view of FIG. 3 in the same embodiment

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Traverse base 2 Guide shaft 3 Optical pickup 3a Guide shaft penetration part of optical pickup 3b Positioning hole of optical pickup 4 Feed rack 4a Rack main body 4b, 4c Positioning arm of feed rack 4d, 4e Positioning pin of feed rack 4f, 4g Feed rack hook 5 Feed gear 6 Turntable 7 Disc 8, 9 Through hole

Claims (4)

An optical pickup that records or reproduces a signal with respect to a recording medium, a guide shaft that holds and guides the optical pickup in a radial direction of the recording medium, a feed rack attached to the optical pickup, and A feed gear that meshes with the feed rack to drive the feed rack in the radial direction of the recording medium, a pin that is provided on the feed rack and positions the optical pickup in a direction perpendicular to the sliding direction, and provided on the feed rack. A positioning arm for positioning and holding the optical pickup in the sliding direction, a hook protruding from the positioning arm for positioning in the optical axis direction of the optical pickup, and meshing with the feed gear provided in the feed rack and the feed gear And a rack having elasticity in a direction to mesh with the feed rack, Optical disc apparatus characterized by holding fixed Kkuappu. The feed rack is pressed against the optical pickup by the elasticity of the rack portion that absorbs the meshing of the feed gear and the feed rack, with the hook of the positioning arm that holds the optical pickup configured to the feed rack as a center of rotation. 2. The optical disc apparatus according to claim 1, wherein the optical pickup device is configured so that the optical pickup and the feed rack are not held and fixed. If the guide rack diameter is larger than the guide shaft diameter and the optical pickup holding hole diameter in the positioning arm of the feed rack, and an abnormal load is applied by inserting the guide shaft into the hole and the optical pickup holding hole. However, the feature is that the engagement between the optical pickup and the feed rack is not disengaged. In the case of the above configuration, even when the feed rack is pressed against the optical pickup around the rack retaining hook by using the elasticity of the rack portion of the feed rack, the optical pickup can be accurately used without causing a load on the optical pickup. The optical disk apparatus according to claim 1, wherein the optical disk apparatus can slide. An optical pickup that records or reproduces a signal with respect to a recording medium, a guide shaft that holds and guides the optical pickup in a radial direction of the recording medium, a feed rack attached to the optical pickup, and A feed gear that meshes with a feed rack and drives the feed rack in a radial direction of the recording medium;
When the radial direction of the recording medium is defined as a first direction, the optical axis direction of the optical pickup is defined as a second direction, and the direction orthogonal to the first and second directions is defined as a third direction,
A pin provided in the feed rack for positioning the optical pickup in a third direction; a positioning arm provided in the feed rack for positioning in the first direction of the optical pickup; An optical disc apparatus comprising a hook for positioning the optical pickup in the second direction.

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