JP2014029743A - Optical pickup - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an optical pickup which is constituted by embedding optical components in a slide base member and has an optical component attachment structure which enables optical components to be easily fitted at prescribed positions and aligned in three-dimensional directions without falling after being fitted.SOLUTION: The pickup is so configured that an optical component is mounted on a holder member 2 and then the holder member 2 is attached to a slide base member 10. The holder member 2 includes guide parts (a first guide part G1 and a second guide part G2) having a fitting guide function, a rotation regulation function, and a falling prevention function. The slide base member 10 includes a body fitting portion 101 into which the holder member 2 having the optical component attached thereto is fitted, and a guide fitting portion 102 into which the guide parts are fitted.

Description

  The present invention relates to an optical pickup that records or reproduces data by irradiating an optical disc with laser light.

  Conventionally, for the purpose of reading information and writing information on an optical disc such as a Blu-ray disc (hereinafter referred to as BD), a digital versatile disc (hereinafter referred to as DVD), and a compact disc (hereinafter referred to as CD). A pickup is used. In this optical pickup, an objective lens for condensing the light emitted from the light source on the information recording surface of the optical disc, a photodetector (PDIC) for receiving reflected light (return light) reflected by the optical disc, Is included.

  In addition, when reading information on the optical disk or writing information on the optical disk by the optical pickup, the position of the light spot condensed by the objective lens is controlled as follows. First, the light spot collected by the objective lens is controlled (focusing control) so that it always exists on the information recording surface of the optical disc. Secondly, the light spot collected on the information recording surface by the objective lens is controlled (tracking control) so as to always follow the track formed on the optical disk.

  In an optical pickup, based on a signal output from a photodetector, a focus error (FE) signal indicating the amount of deviation between a light spot and an information recording surface (target information recording surface), a light spot and a track (target) The tracking error (TE) signal representing the amount of deviation from the track) is calculated. Control for moving the position of the objective lens in the focus direction (focusing control) is performed based on the FE signal, and control for moving the position of the objective lens in the tracking direction (tracking control) is performed based on the TE signal.

  The focus direction is a direction substantially perpendicular to the information recording surface of the optical disc, and the tracking direction is a direction (crossing the track) substantially perpendicular to the track of the optical disc (formed concentrically or spirally on the information recording surface). Direction).

  An optical pickup having a configuration in which return light from an optical disk is divided into a plurality of lights by a diffractive optical element and received by a photodetector to obtain a TE signal has already been proposed (see, for example, Patent Document 1).

  In the optical pickup having such a configuration, there arises a problem that an appropriate TE signal cannot be obtained when the mounting accuracy of the photodetector cannot be sufficiently secured. For example, if the position of the photodetector is shifted, the position where the diffracted light diffracted by the diffractive optical element falls on the photodetector fluctuates, and an appropriate TE signal cannot be obtained.

  Therefore, when assembling optical components such as a laser light source and an objective lens into the slide base member, it is important to accurately adjust these assembling positions and assembling postures.

  For example, when a holding substrate that integrally holds a light source and a light receiving element is incorporated in a holding member that holds an objective lens, a convex portion is formed on the holding member, and the holding substrate is movable based on the convex portion. An optical pickup that can easily and accurately adjust the position of the holding substrate with respect to the holding member has been proposed (see, for example, Patent Document 2).

JP 2009-9628 A Japanese Patent Laid-Open No. 7-240035

  When assembling the optical component into the slide base member, it is desired that the assembly accuracy is high in three dimensions. Therefore, as described in the above-mentioned Patent Document 2, even if the position can be aligned with respect to the two-dimensional direction only by adjusting the position along one reference surface, it can be correctly aligned along the three-dimensional direction. It is difficult to align.

  In addition, when aligning in the three-dimensional direction, it is assumed that the optical component or the member to which the optical component is attached is held in the air with respect to the slide base member to be incorporated. It is desirable that the structure does not fall off or slip off from the slide base member even during holding.

  In particular, when a small optical component is assembled with high precision to a slide base member of an optical pickup having a small and compact configuration, it can be easily fitted into the mounting site, and is difficult to come off once fitted. It is desirable that it can be easily aligned in the three-dimensional direction.

  In view of the above problems, the present invention provides an optical pickup constructed by incorporating an optical component into a slide base member. The optical component can be easily fitted in a predetermined position, and once fitted, it does not fall out. An object of the present invention is to provide an optical pickup having an optical component mounting structure that can be aligned in a three-dimensional direction.

  In order to achieve the above object, the present invention is an optical pickup configured by incorporating an optical component into a slide base member, and has a holder member for holding the optical component, and the optical component is fixed to the holder member. Then, the holder member is attached to a holder attachment portion provided on the slide base member, and the adjustment chuck portion used when the holder member aligns the optical component; and an optical component attachment portion for attaching the optical component; An adhesive fixing portion for fixing the holder member to the slide base member; a guide portion having a fitting guide function, a rotation restricting function, and a drop-off preventing function; and a guide fitting for fitting the guide portion into the slide base member. It is characterized by providing a section.

  According to this configuration, the holder member to which the optical component is attached includes the adjustment chuck portion, and the guide portion having the fitting guide function, the rotation restricting function, and the drop-off preventing function. The base member can be easily fitted into a predetermined position, and once fitted, the base member can be aligned in a three-dimensional direction without falling off. That is, it is possible to obtain an optical pickup having an optical component mounting structure in which an optical component can be easily fitted in a predetermined position, and once fitted, the optical component can be aligned in a three-dimensional direction without falling off.

  According to the present invention, in the optical pickup configured as described above, the guide portion includes a first guide portion that exhibits a fitting guide function and a drop-off prevention function, and a second guide portion that exhibits a rotation restricting function. The fitting part is characterized by having a first fitting part for fitting the first guide part and a second fitting part for fitting the second guide part. According to this configuration, the first guide portion and the second guide portion can be in a preferable form that exhibits the required functions, and the fitting guide function, the drop-off prevention function, and the rotation restricting function are effectively exhibited. It becomes possible to do.

  According to the present invention, in the optical pickup configured as described above, the first guide portion includes a guide piece and a drop-off preventing piece provided on a distal end side of the guide piece, and the first fitting portion includes the guide piece and the drop-off piece. A wide insertion hole into which the prevention piece can be fitted, a slide groove portion that is continuous with the insertion hole and narrower than the insertion hole, and an intermediate width that is continuous with the slide groove portion and between these wide and narrow widths. The guide piece has a narrow width portion through which the slide groove portion can be inserted, and the drop-off prevention piece has a width wider than the fixed width. According to this configuration, after the first guide portion is fitted into the insertion hole, the slide groove portion can be inserted through the narrow width portion of the guide piece and moved to the fixed hole. Further, when the first guide portion is in the fixing hole, the holder member can be prevented from falling off the slide base member via the drop-off preventing piece.

  According to the present invention, in the optical pickup configured as described above, the holder member includes a top surface portion on which a chuck gripping hole serving as an adjustment chuck portion is formed and a side surface portion on which an optical component mounting portion is formed. The first guide portion is provided to hang from the upper surface portion in the same direction as the side surface portion. According to this configuration, even if the L-shaped side surface portion is fitted into the guide fitting portion, the chuck gripping hole is exposed on the L-shaped upper surface portion, so that the position of the optical component can be adjusted by grasping the chuck gripping hole.

  According to the present invention, in the optical pickup configured as described above, the second guide portion is provided so as to hang from the upper surface portion to a portion different from the first guide portion. According to this configuration, by providing the second guide portion at a preferable portion that exhibits the rotation restricting function, the holder member, and thus the optical component, can be prevented from being displaced beyond the allowable adjustment range. Adjustment work can be easily performed.

  According to the present invention, in the optical pickup having the above-described configuration, an adhesive fixing portion is provided on the upper surface portion, and after the three-dimensional adjustment of the arrangement position of the optical component, the upper surface portion is adhesively fixed to the slide base member. It is characterized by that. According to this configuration, the holder member can be bonded and fixed to the slide base member while maintaining the state in which the position adjusting jig holds the holder member via the chuck gripping hole.

  According to the present invention, it is possible to obtain an optical pickup having an optical component mounting structure in which an optical component can be easily fitted in a predetermined position, and once fitted, the optical component can be aligned in a three-dimensional direction without falling off. Can do.

1 is a schematic plan view showing a configuration of an optical pickup according to the present invention. It is a schematic side view of an optical pickup. It is a schematic plan view which shows an example of the optical structure of an optical pick-up. It is a perspective view which shows an example of the holder member which attaches an optical component. It is a top view of the holder member of Drawing 3A. It is a top view which shows the guide fitting part provided in a slide base member. It is a top view which shows the state which fitted the holder member in the guide fitting part. It is a top view which shows the state which moved the holder member to the fixing | fixed part. It is a top view which shows an example of a guide fitting part. It is a front view which shows an example of a 1st guide part. It is a front view which shows the modification of the guide part which concerns on this invention.

  Embodiments of the present invention will be described below with reference to the drawings. Moreover, the same code | symbol is used about the same structural member, and detailed description is abbreviate | omitted suitably. First, an example of an optical pickup will be described with reference to FIGS. 1A and 1B. FIG. 1A is a schematic plan view showing the configuration of the optical pickup according to the present embodiment, and FIG. 1B is a schematic side view seen along an arrow L in FIG. 1A.

  The optical pickup 1 of the present embodiment is a device that records or reproduces data by irradiating an optical disc D with a laser beam. For example, as shown in FIG. 1A, a slide base member 10 and a slide base member 10 And an objective lens actuator 30 fixedly disposed on the head.

  An optical member included in the optical pickup 1 is mounted on the slide base member 10. Further, bearing portions 10 a and 10 b are provided at the left and right ends of the slide base member 10. The slide base member 10 is slidably supported by the guide shaft 100 provided in the optical disc device (device for reproducing and recording the optical disc D) by the bearing portions 10a and 10b. The guide shaft 100 provided in the optical disc apparatus is disposed so as to extend in the radial direction (radial direction; Rad direction) of the optical disc. The optical pickup 1 slidable with respect to the guide shaft 100 can read and write information by accessing a desired address of the rotating optical disk D.

  The objective lens actuator 30 is a device that enables the objective lens provided in the optical pickup 1, for example, the two objective lenses 16 and 20 to move in the focus direction and the tracking direction (the same direction as the Rad direction).

  In the optical pickup 1, when reading or writing information, focusing control is performed so that the focal position of the objective lens 16 (or the objective lens 20) always matches the information recording surface RS (see FIG. 1B) of the optical disc D. There is a need. In the optical pickup 1, the position of the light spot condensed on the information recording surface RS of the optical disc D by the objective lens 16 (or the objective lens 20) when reading or writing information is the track of the optical disc D. It is necessary to perform tracking control so as to always follow. The objective lens actuator 30 is driven, for example, when performing these focusing control and tracking control.

  The objective lens actuator 30 has a lens holder 31 that holds the objective lenses 16 and 20 and is configured to support the lens holder 31 with a wire 32 so as to be swingable. Then, the lens holder 31 (objective lenses 16 and 20) is moved by a force generated using a coil and a magnet. Since this type of objective lens actuator is known, detailed description thereof is omitted here.

  FIG. 2 is a schematic explanatory diagram showing an optical configuration of the optical pickup 1 according to the present embodiment. The optical pickup 1 is formed with an optical path for BD that guides the light emitted from the first light source 11 to the optical disc D and guides the reflected light (returned light) reflected by the optical disc D to the light detection unit 23. ing. The optical pickup 1 has a DVD optical path that guides the light emitted from the second light source 17 to the optical disc D and guides the reflected light (returned light) reflected by the optical disc D to the light detection unit 23. Is formed.

  The optical pickup 1 has a configuration in which a plurality of optical members are shared by the optical path for BD and the optical path for DVD. In other words, the optical pickup 1 is configured to have an optical path that is commonly used for both BD and DVD. In the optical pickup 1, the light detection unit 23 is also used for both BD and DVD. Since such a configuration is adopted, the optical pickup 1 can form an optical pickup corresponding to BD and DVD with a small number of parts.

  First, the optical path for BD will be described. The first light source 11 can emit BD laser light (for example, laser light having a wavelength of 405 nm band). The laser light emitted from the first light source 11 is sent to the polarization beam splitter 12.

  The polarization beam splitter 12 reflects S-polarized laser light (which is an example of linearly polarized light and is not limited thereto) emitted from the first light source 11. The laser beam reflected by the polarization beam splitter 12 is converted into circularly polarized light by the quarter wavelength plate 13. The laser light emitted from the quarter-wave plate 13 is reflected by the first rising mirror 15 after passing through the collimating lens 14. The laser light reflected by the first raising mirror 15 reaches the first objective lens 16 above the first raising mirror 15. The first objective lens 16 has a function of condensing incident laser light on the information recording surface RS of the optical disc D.

  After being focused on the information recording surface RS by the first objective lens 16, the reflected light (returned light) reflected by the information recording surface RS passes through the first objective lens 16 and then the first rising mirror. 15 is reflected. Then, the return light passes through the collimating lens 14, is converted into P-polarized light by the quarter wavelength plate 13, and passes through the polarization beam splitter 12. The return light that has passed through the beam splitter 18 is condensed onto a photodetector 23 via a sensor optical system including a diffractive optical element 21 and a sensor lens 22 including a cylindrical surface.

  The photodetector 23 functions as a photoelectric conversion unit that converts the received optical signal into an electrical signal. The photodetector 23 is an example of a light detection unit of the present invention. The electrical signal output from the photodetector 23 is sent to the signal processing unit 24. In the signal processing unit 24, a reproduction signal, an FE signal, a TE signal, and the like are generated.

  Next, the optical path for DVD will be described. The second light source 17 can emit DVD laser light (for example, laser light having a wavelength of 650 nm band). The laser light emitted from the second light source 17 is sent to the beam splitter 18.

  The beam splitter 18 reflects a part of the incident laser light and transmits a part thereof. The laser beam reflected by the beam splitter 18 passes through the polarization beam splitter 12, the quarter wavelength plate 13, and the collimating lens 14. The polarization beam splitter 12 is an optical member that acts on the BD laser beam, and the DVD laser beam is transmitted regardless of the polarization state.

  The first raising mirror 15 is a dichroic mirror, which reflects the BD laser beam but allows the DVD laser beam to pass therethrough. For this reason, the laser light emitted from the second light source 17 and passing through the collimating lens 14 is also transmitted through the first raising mirror 15. The laser light transmitted through the first raising mirror 15 is reflected by the second raising mirror 19. The laser light reflected by the second raising mirror 19 reaches the second objective lens 20 above the second raising mirror 19. The second objective lens 20 has a function of condensing incident laser light on the information recording surface RS of the optical disc D.

  After being focused on the information recording surface RS by the second objective lens 20, the reflected light (returned light) reflected by the information recording surface RS passes through the second objective lens 20 and then the second rising mirror. 19 is reflected. Then, the return light passes through the first raising mirror 15, the collimating lens 14, the quarter wavelength plate 13, and the polarization beam splitter 12. Thereafter, the return light that has passed through the beam splitter 18 is condensed onto the photodetector 23 via a sensor optical system including the diffractive optical element 21 and a sensor lens 22 including a cylindrical surface. The photodetector 23 performs photoelectric conversion and sends an electric signal to the signal processing unit 24. The signal processing unit 24 generates a reproduction signal, an FE signal, a TE signal, and the like.

  The collimating lens 14 is movable in the optical axis direction M (left and right direction in FIG. 2), and the position is appropriately moved according to the type of the corresponding optical disc D, layer jump, and the like. As a result, the degree of convergence / divergence of light incident on the objective lenses 16 and 20 can be adjusted, and the influence of spherical aberration can be appropriately suppressed. Further, the diffractive optical element 21 is provided so as to be able to generate a TE signal.

  The reason why the sensor lens 22 is provided with a cylindrical surface so that astigmatism is given is to enable generation of an FE signal using a known astigmatism method. A control unit (not shown) that controls the operation of the optical pickup 1 based on the FE signal and the TE signal generated by the signal processing unit 24 performs the focusing control and the tracking control of the objective lens actuator 30. Control the drive.

  As described above, the optical pickup 1 according to the present embodiment divides the return light from the optical disk D into a plurality of lights by the diffractive optical element 21 and receives the light by the photodetector 23 to obtain the FE signal and the TE signal. ing. Therefore, it is desired that the sensor optical system including the diffractive optical element 21 is correctly adjusted in its assembly position and assembly orientation with respect to the optical axis from the objective lens to the photodetector 23.

  Therefore, in this embodiment, a sensor optical system including the diffractive optical element 21 that is desired to be aligned with high accuracy is mounted on a holder member having a predetermined function, and is assembled in a three-dimensional direction (front and rear). The position can be easily adjusted in the horizontal and vertical directions.

  Next, the holder member according to the present embodiment will be described with reference to FIGS. 3 to 5 and the assembled structure using the holder member. FIG. 3A is a perspective view illustrating an example of a holder member, and FIG. 3B is a plan view. FIG. 4 is a plan view showing a guide fitting portion provided on a slide base member to which the holder member is mounted, and FIG. 5 is a plan view showing a state in which the holder member is fitted into the guide fitting portion.

  In the present embodiment, for example, the diffractive optical element 21 that is an optical component is incorporated into the slide base member 10 using the holder member 2. That is, the optical pickup 1 according to the present embodiment includes a holder member 2 that holds an optical component. After fixing the optical component to the holder member 2, the holder member 2 is attached to the slide base member 10. .

  Further, in order to make the mounting position of the optical component accurate, an adjustment chuck portion used when aligning the optical component with the holder member 2, an optical component mounting portion for mounting the optical component, and the holder member 2 are connected to the slide base member 10. An adhesive fixing portion for fixing the guide portion, a guide portion having a fitting guide function, a rotation regulating function, and a drop-off preventing function are provided, and a guide fitting portion for fitting the guide portion is provided on the slide base member 10.

  One guide portion may be provided with a fitting guide function, a rotation restricting function, and a drop-off preventing function, but a plurality of guide portions individually having these functions may be provided. For example, as shown to FIG. 3A, it is set as the structure provided with the 1st guide part G1 which exhibits a fitting guidance function and a drop-off prevention function, and the 2nd guide part G2 which exhibits a rotation control function.

  As shown in the drawing, the holder member 2 having the first guide part G1 and the second guide part G2 includes an upper surface part 2a on which chuck gripping holes 2c and 2d serving as adjustment chuck parts are formed, and an optical component mounting. It is made of a sheet metal having an L-shaped side view provided with a side surface part 2b on which the part 3 is formed, and is manufactured, for example, as a sheet metal member made of stainless steel. Further, it may be an integrally molded product using a resin or a ceramic molded product.

  The first guide part G1 is provided to hang from the upper surface part 2a in the same direction as the side surface part 2b. With this configuration, even if the L-shaped side surface portion 2b is fitted into the guide fitting portion, the chuck gripping holes 2c and 2d are exposed on the L-shaped upper surface portion 2a, so that the chuck gripping holes 2c and 2d are gripped. Thus, the position of the optical component can be adjusted.

  The chuck gripping hole 2c is, for example, a round shape, and the chuck gripping hole 2d is, for example, an elliptical shape. An adjustment pin that matches each shape is inserted, and the holder member 2 is gripped and aligned without being displaced. be able to.

  As described above, the holder member 2 has the optical component mounting portion 3 and the chuck gripping holes 2c and 2d for adjustment disposed at right angles, so that the chuck member can be gripped with the optical component incorporated in the slide base member. It is possible to finely adjust the position and posture of the optical component by inserting adjustment pins into the holes 2c and 2d.

  The first guide part G1 has a wide dropout prevention piece G1b on the tip side. Further, the guide piece G1a having a narrow width portion is provided up to the dropout prevention piece G1b. The second guide part G2 is preferably provided so as to hang from the upper surface part 2a at a site different from the first guide part G1. For example, as shown in FIG. 3B, it is provided on the side surface orthogonal to the first guide part G1. In such a configuration, the second guide portion G2 is provided in a preferable portion that exhibits the rotation restricting function, so that the holder member 2 and thus the optical component (for example, the diffractive optical element 21) are allowed to be adjusted. Therefore, the position adjustment operation can be easily performed.

  Next, a guide fitting portion on the slide base member 10 side in which the holder member 2 holding the optical component is fitted and mounted will be described with reference to FIG.

  As shown in FIG. 4, a main body fitting portion 101 for fitting the main body portion of the holder member 2 and a guide fitting portion 102 for fitting the guide portion are formed at predetermined portions of the slide base member 10. The main body fitting portion 101 is a portion for fitting and attaching the side surface portion 2b of the holder member 2 to which the optical component is attached, and the guide fitting portion 102 is a first fitting portion for fitting the first guide portion G1.

  The guide fitting portion 102 (first fitting portion) includes a wide insertion hole 102a into which the guide piece and drop-off prevention piece G1b can be fitted, and a slide groove portion that is continuous with the insertion hole 102a and has a narrower width than the insertion hole. 102b and a fixed hole 102c having an intermediate width between the wide width and the narrow width are provided continuously to the slide groove portion 102b.

  Since the drop-off prevention piece G1b provided on the distal end side of the first guide part G1 can be fitted into the insertion hole 102a, the drop-off prevention piece G1b is inserted into the insertion hole 102a. When the guide piece G1a having a narrow width that can be inserted through the slide groove portion 102b of the first guide portion G1 is reached, the guide piece G1a can be moved along the slide groove portion 102b.

  That is, after the first guide portion G1 is fitted into the insertion hole 102a, the slide groove portion 102b can be inserted through the guide piece G1a and moved to the fixing hole 102c. Further, when the first guide portion G1 is in the fixing hole 102c, it is possible to prevent the holder member 2 from falling off the slide base member 10 via the drop-off preventing piece G1b.

  As described above, when the first guide portion G1 is moved to the fixing hole 102c and the holder member 2 to which the optical component is attached is fitted into the main body fitting portion 101 and accommodated, the holder member 2 is removed from the main body fitting portion 101. Do not fall off or fall off. That is, even if the slide base member 10 is tilted or turned upside down from this state, the holder member 2 does not fall out of the main body fitting portion 101.

  FIG. 5 is a plan view showing a state in which the holder member 2 is fitted in the guide fitting portion, and shows a state in which the first guide portion G1 is inserted into the insertion hole 102a. When the first guide part G1 is further pushed in this state, the second guide part G2 comes into contact with the slide base member 10 and the movement is stopped.

  When this stops, the drop-off prevention piece G1b passes through the insertion hole 102a, and the narrow guide piece G1a is positioned. If the guide piece G1a is rotated in the direction of the arrow K1 shown in FIG. Slides on the surface of the slide base member 10, and the guide piece G1a of the first guide portion G1 passes through the slide groove portion 102b. When the second guide portion G2 reaches the end 101a (corresponding to the second fitting portion) of the main body fitting portion 101, the second guide portion G2 can move in the direction penetrating the drawing, that is, can be dropped, and the upper surface of the holder member 2 The portion 2a contacts the surface of the slide base member 10.

  That is, as shown in FIG. 6, the second guide portion G2 is positioned at the end 101a (second fitting portion) of the main body fitting portion 101, and the holder member 2 is a holder fitted into the main body fitting portion 101. It becomes the member 2B. At this time, the first guide portion G1 is positioned in the fixing hole 102c.

  As described above, the guide fitting portion according to the present embodiment includes the insertion hole 102a, the slide groove portion, and the fixing hole, the first fitting portion (guide fitting portion 102) for fitting the first guide portion G1, and the second fitting portion. It has the 2nd fitting part (end part 101a of main part fitting part 101) which fits guide part G2. Further, the second guide part G2 is shorter in length than the first guide part G1 provided with the drop-off prevention piece G1b, the drop-off prevention piece G1b penetrates the insertion hole 102a, and the narrow guide piece G1a is located. Of length.

  Moreover, when it becomes the holder member 2B in the state fitted in the main body fitting part 101, the wall of the edge part 101a which pinches | interposes the 2nd guide part G2 controls the rotation magnitude | size of the holder member 2B. That is, it can be displaced in the rotational direction by the gap between the wall of the end portion 101a and the second guide portion G2, and exhibits a rotation restricting function. In other words, the second guide part G2 has a rotation restricting function.

  Then, using the chuck grip holes 2c and 2d provided on the upper surface portion 2a of the holder member 2B at the position shown in FIG. 6, the chuck member is used for gripping, and the position of the holder member 2B in the three-dimensional direction is finely adjusted. To do. After finely adjusting the position in the three-dimensional direction, a predetermined adhesive is poured into the contact portion or gap with the surface of the slide base member 10 to fix them.

  For example, the corner portion of the upper surface portion 2a facing the surface of the slide base member 10 is bonded and fixed. In this case, as shown in the drawing, a plurality of adhesive fixing portions 4a, 4b, 4c, and 4d are provided on the upper surface portion 2a.

  That is, in the optical pickup of the present embodiment, an adhesive fixing portion is provided on the upper surface portion 2a of the holder member 2, and after the three-dimensional adjustment of the arrangement position of the optical component, the upper surface portion 2a is bonded and fixed to the slide base member 10. Yes. With this configuration, the holder member 2 can be bonded and fixed to the slide base member 10 while maintaining the state in which the position adjusting jig holds the holder member 2 via the chuck gripping holes 2c and 2d.

  Next, the guide fitting portion 102 and the guide portion will be further described with reference to FIGS. 7A, 7B, and 7C.

  As shown in FIG. 7A, the guide fitting portion 102 connects the insertion hole 102a having a width HA, the fixing hole 102c having a width HB narrower than the width HA, and the insertion hole 102a and the fixing hole 102c. The slide groove 102b is narrower than the width HB.

  The slide groove 102b is a curved groove and connects the insertion hole 102a and the fixing hole 102c so as to rotate by an angle θ. That is, when the holder member 2 to which the optical component is attached is fitted into the main body fitting portion 101, the optical component attaching portion shown in FIG. 5 is fitted into the main body fitting portion 101, and the first guide portion G1 is inserted into the insertion hole 102a. The holder member 2A in the state where the holder member 2B corresponding to the regular arrangement position shown in FIG. 6 is moved from the holder member 2A in a slightly inclined state so that the first guide portion G1 side is rotated along the curved slide groove portion 102b. To.

  As shown in FIG. 7B, the first guide portion G1 to be inserted into the insertion hole 102a is a sheet metal provided with a wide drop-off prevention piece G1b at the tip of the guide piece G1a having a width HD that is slidable with respect to the slide groove portion 102b. It is made into a shape. Further, the width HC of the drop-off prevention piece G1b is narrower than the width HA of the insertion hole 102a and wider than the width HB of the fixing hole 102c. Further, a chamfered portion G1c is provided at a corner portion of the drop-off preventing piece G1b to form a guide guide portion for insertion so that it can be easily inserted.

  With the above configuration, the first guide portion G1 is fitted so that the drop-off prevention piece G1b is inserted into the insertion hole 102a, and is moved along the slide groove portion 102b via the narrow guide piece G1a. Can be easily guided up to.

  Further, when the first guide portion G1 is mounted in the fixing hole 102c, the fixing hole 102c does not fall off through the drop-off preventing piece G1b having a width wider than the width HB of the fixing hole 102c. That is, even if the holder member 2 to which the optical component is attached is tilted in the three-dimensional direction, the first guide portion G1 does not come off the fixing hole 102c and does not come off the slide base member 10.

  Further, the narrow width portion provided in the first guide portion G1 may be provided with the entire guide piece G1a other than the drop-off prevention piece G1b provided at the tip having a narrow width, but has a chamfered portion G1Ac as shown in FIG. 7C. A first guide portion G1A having a configuration in which a narrow width portion G1Aa is provided in a part of the upper portion of the drop-off prevention piece G1Ab and a guide piece G1Ad having a width HE narrower than the width HB of the fixing hole 102c is provided thereon. Good.

  In the case of the first guide portion G1A having the above-described configuration, the guide piece G1Ad having the width HE exhibits the above-described rotation restricting function of the second guide portion G2. That is, the first guide part G1A serves as a guide part that exhibits both the fitting guide function and the drop-off preventing function of the first guide part G1 and the rotation restricting function of the second guide part G2.

  Therefore, as long as the holder member includes the first guide part G1A, the second guide part G2 may be omitted. Of course, the structure provided with this 1st guide part G1A and the 2nd guide part G2 may be sufficient.

  If it is the structure provided with both the 1st guide part (G1, G1A) and the 2nd guide part (G2), it can each be provided in the preferable site | part which provides these, and it is also easy to make a preferable shape, respectively. is there. Therefore, if it is such a structure, a 1st guide part and a 2nd guide part can be made into the preferable form which exhibits the function for which each is calculated | required, a fitting guide function, a drop-off prevention function, and a rotation control function Can be effectively exhibited.

  As described above, according to the optical pickup according to the present invention, when the optical component is mounted in a correct posture, the optical component is mounted on the holder member, and then the holder member is mounted on the slide base member. A guide portion having a fitting guide function, a rotation restricting function, and a drop-off prevention function is provided, and a main body fitting portion for fitting the holder member 2 attached with an optical component and a guide fitting portion for fitting the guide portion are provided on the slide base member. Since it is configured, the holder member with the optical component attached can be easily fitted into the slide base member at a predetermined position, and once fitted, the optical component can be aligned in the three-dimensional direction without falling off. An optical pickup having a structure can be obtained.

  The guide portion includes a first guide portion that exhibits a fitting guide function and a drop-off prevention function, and a second guide portion that exhibits a rotation restricting function. The guide fitting portion provided on the slide base member includes an insertion hole and The first guide portion and the second guide portion have a first fitting portion that includes a slide groove portion and a fixing hole, and a second fitting portion that fits the second guide portion. Can be formed into a preferable shape that exhibits the required functions, and the fitting guide function, the drop-off preventing function, and the rotation regulating function can be effectively exhibited.

  In addition, since the holder member is L-shaped in a side view including an upper surface portion on which a chuck grip hole is formed and a side surface portion on which an optical component mounting portion is formed, the optical member is incorporated in the slide base member. The position and posture of the optical component can be finely adjusted by inserting an adjustment pin into the chuck holding hole.

  As described above, according to the present invention, it is possible to obtain an optical pickup that can be easily positioned by fitting a holder member with an optical component attached thereto and holding it in the air without falling off.

  Therefore, the optical pickup according to the present invention can be suitably applied to an optical pickup that is required to adjust the arrangement position of optical components in a three-dimensional direction during assembly.

DESCRIPTION OF SYMBOLS 1 Optical pick-up 2 Holder member 2a Upper surface part 3 Optical component attachment part 10 Slide base member 21 Diffractive optical element (optical component)
101 Main body fitting portion 101a End portion (second fitting portion)
102 Guide fitting portion (first fitting portion)
102a Insertion hole 102b Slide groove part 102c Fixing hole G1 1st guide part G2 2nd guide part G1a Guide piece G1b Fall-off prevention piece

Claims (6)

An optical pickup configured by incorporating an optical component into a slide base member,
A holder member for holding the optical component; after the optical component is fixed to the holder member, the holder member is attached to a holder mounting portion provided on the slide base member; and the holder member is attached to the optical component. An adjustment chuck portion used at the time of positioning, an optical component mounting portion for mounting the optical component, an adhesive fixing portion for fixing the holder member to the slide base member, a fitting guide function, a rotation regulating function, and a drop-off preventing function, An optical pickup comprising: a guide fitting portion including: a guide fitting portion for fitting the guide portion into the slide base member.   The guide portion includes a first guide portion that exhibits a fitting guide function and a drop-off preventing function, and a second guide portion that exhibits a rotation restricting function, and the guide fitting portion includes a first guide portion that fits the first guide portion. The optical pickup according to claim 1, further comprising a first fitting portion and a second fitting portion into which the second guide portion is fitted.   The first guide part has a guide piece and a drop-off prevention piece provided on the tip side of the guide piece, and the first fitting part has a wide insertion hole into which the guide piece and the drop-off prevention piece can be fitted. A slide groove having a width narrower than that of the insertion hole, and a fixed hole having an intermediate width between the wide width and the narrow width of the guide piece. The optical pickup according to claim 2, further comprising: a narrow width part through which the slide groove part can be inserted, wherein the drop-off preventing piece has a width wider than the fixed width.   The holder member is L-shaped in a side view including an upper surface portion on which a chuck gripping hole serving as an adjustment chuck portion is formed and a side surface portion on which an optical component mounting portion is formed, and the first guide portion is the upper surface portion. 4. The optical pickup according to claim 2, wherein the optical pickup is provided so as to hang down from a portion in the same direction as the side surface portion. 5.   5. The optical pickup according to claim 4, wherein the second guide portion is provided to hang from the upper surface portion to a portion different from the first guide portion.   6. The adhesive fixing part is provided on the upper surface part, and the upper surface part is adhesively fixed to the slide base member after three-dimensional adjustment of the arrangement position of the optical component. Optical pickup.

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