WO2008029436A1

WO2008029436A1 - Pickup device and method for manufacturing same

Info

Publication number: WO2008029436A1
Application number: PCT/JP2006/317429
Authority: WO
Inventors: Kazuaki Okada
Original assignee: Pioneer Corporation
Priority date: 2006-09-04
Filing date: 2006-09-04
Publication date: 2008-03-13

Abstract

A disc device is a pickup device (5) to be used for recording or reproduction on or from one or a plurality of kinds of optical discs (41). The pickup device is provided with a pickup body (51) as a case for the pickup device (5), and an optical component (5), which is bonded to a pickup body with a photocuring bonding means (82) and emits or guides laser beams to be used for recording or reproduction. The pickup device is also provided with guiding means (91, 92, 93), which are one or a plurality of inclined surfaces formed on a reinforcing section for reinforcing rigidity of the pickup device in the pickup body, and guide at least a part of light, which is applied to the pickup device and has a prescribed wavelength, to the bonding means.

Description

Specification

Pickup device and manufacturing method thereof

Technical field

TECHNICAL FIELD [0001] The present invention relates to a technical field of a pickup apparatus in which an optical component is bonded by a photo-curing adhesive means such as a UV (Ultra Violet Ray: UV) curable adhesive, and a manufacturing method thereof.

Background art

In this type of pickup device or an optical disc read and written by this type of pickup device, a UV curable adhesive is applied to a desired adhesive portion as an adhesive for optical components or as a protective film for the optical disc. Then, the UV light that cures the applied UV curable adhesive is irradiated. However, depending on the environment in which the bonded portion is placed, for example, depending on the size and positional relationship of other parts arranged in the vicinity of the bonded portion, the efficiency of the UV irradiation amount to the bonded portion may decrease, and UV curing may occur. The curing rate of the mold adhesive may be reduced or spotted.

[0003] In order to deal with such problems, for example, an optical disk protective film machine technology has been proposed (see Patent Document 1). According to this technology, the disc tray used to cure the UV-curing protective film applied to the surface of the optical disc has a slope formed on the outer periphery.

Since UV is reflected, UV is also applied to the outer peripheral edge of the disc. Therefore, the entire protective film of the optical disk can be cured relatively quickly and reliably.

Patent Document 1: Japanese Patent Laid-Open No. 6-325412

Disclosure of the invention

Problems to be solved by the invention

However, for example, the technique disclosed in Patent Document 1 described above may have the following problems. In other words, the application target of this technique is an optical disk, and is not intended to be applied to an adhesive portion of the pickup device itself. In the pickup device, in particular, it is necessary to secure the irradiation amount per unit time of light such as UV (hereinafter also referred to as “light irradiation efficiency” as appropriate) and the rigidity of the pickup device. This can be a trade-off problem in the use of space in the up device. For example, in order to ensure the rigidity of the pickup device itself made of grease, it is necessary to reinforce the pickup body by wall filling, which may block the UV light path.

The present invention has been made in view of the above-described problems, for example, and provides a pickup device capable of improving the light irradiation efficiency with respect to the bonded portion while maintaining the rigidity of the pickup device as much as possible. Let it be an issue.

Means for solving the problem

[0007] (Pickup device)

In order to solve the above-described problem, the pickup device of the present invention is a pickup device for recording or reproducing one or more types of optical discs, and includes a pickup body as a casing of the pickup device, An optical component that is bonded by a photo-curing bonding means and emits or guides a laser beam used for recording or reproduction, and a reinforcing portion that reinforces the rigidity of the pickup device of the pickup body. A plurality of inclined surfaces, comprising guiding means for guiding at least part of light of a predetermined wavelength irradiated to the pickup device to the bonding means.

[0008] This pickup apparatus is a pickup apparatus used for recording or reproducing one or more types of optical discs, and includes a pickup body as a casing. The material of this pickup body includes, for example, rosin. Then, an optical component (for example, a laser driver LD, a lens, or a mirror) is bonded to the pickup body by a photo-curing bonding means. The optical component adjusts the optical axis and emits or guides laser light for recording or reproduction. Here, the “photo-curing adhesive means” is a material that functions as an adhesive because it is cured by a photopolymerization reaction when irradiated with a curing light having a predetermined wavelength. For example, UV cured resin is cured by irradiating with ultraviolet rays.

[0009] Here, when the pickup body is made of a softer material than a metal such as resin, it is necessary to ensure rigidity. Therefore, a part of the pickup body is formed relatively thick as a reinforcing part for reinforcing the rigidity of the pickup device as compared with other parts. However, when the reinforcing portion as described above is formed, the following technical problems may occur when the adhesive means is photocured. That is, when the adhesive means is photocured, if the adhesive means is irradiated with curing light, a part of the light may be blocked by the reinforcing portion, which may reduce the light irradiation efficiency.

However, since the pickup device according to the present embodiment further includes the following guiding means, it is possible to avoid a decrease in irradiation efficiency. More specifically, the guiding means is one or a plurality of inclined surfaces formed on the reinforcing portion described above. This inclined surface widens the light irradiation space and reflects the light toward the bonding means. Therefore, at least a part of the curing light irradiated to the pick-up apparatus is guided to the bonding means directly or along the inclined surface. In other words, if the inclined surface is not formed, it reaches the optical power adhesion means for curing that would have been blocked by the reinforcing portion. At this time, since the reinforcing portion is not completely removed, the rigidity required in practice can be secured.

[0012] Therefore, it is possible to improve the light irradiation efficiency with respect to the bonding means by the guiding means while maintaining the rigidity of the pickup device as much as possible by the reinforcing portion. As a result, the irradiation time for irradiating the curing light is shortened, which is very advantageous in practice.

In one aspect of the pickup apparatus of the present invention, the pickup body further includes a fixing portion protruding in a predetermined height direction of a bottom surface force of the pickup body in order to fix the optical component, The adhering means extends along the predetermined height direction, the reinforcing portion protrudes along the predetermined height direction, and the inclined surface is formed to intersect the predetermined height direction. The

[0014] According to this aspect, the optical component (for example, a laser light source body or an optical component such as a lens' mirror that guides laser light emitted from the laser light source body (however, a holder on which the optical component is mounted) In order to fix the components)), the pickup body further has a fixing part protruding in a predetermined height direction from the bottom surface. The “predetermined height direction” mentioned here is typically a direction substantially perpendicular to the bottom surface. The fixing part is, for example, a laser holder, and the fixing part is provided with a hole into which an optical component such as a laser light source body can be fitted. Then, the adhering means adheres the fixed part and the optical component in the predetermined height direction. Extending along. On the other hand, the reinforcing portion also protrudes along the predetermined height direction. In other words, both the fixing portion and the reinforcing portion protrude from the bottom surface force of the pickup body in the height direction or along a predetermined height direction. That is, since the bonding means is surrounded by both the fixed part and the reinforcing part, it is difficult for the curing light to reach the bonding means. Alternatively, as it approaches the bottom surface along the predetermined height direction, it becomes difficult for the light for curing to reach, and as a result, there is a possibility that unevenness occurs in the curing speed of the bonding means. However, according to this aspect, the inclined surface is formed so as to intersect the predetermined height direction. Therefore, the irradiation space of the light irradiated in the direction intersecting with the predetermined height direction is expanded. Therefore, more light is emitted near the bottom surface than when no inclined slope is formed. That is, unevenness in the curing rate of the bonding means can be preferably eliminated.

In another aspect of the pickup device of the present invention, the roughness that quantitatively indicates the degree of unevenness of the inclined surface is equal to or less than a predetermined first roughness threshold.

According to this aspect, the inclined surface is, for example, mirror-finished, and the roughness is equal to or less than the predetermined first roughness threshold. Here, the “first roughness threshold” is a value determined in advance by experimentation or simulation as an upper limit value of the roughness so that the reflection direction of the curing light incident on the inclined surface is uniform to some extent. It is. At this time, the curing light incident on the inclined surface is specularly reflected. In other words, the direction of reflection of the curing light incident on the inclined surface is uniform as compared with the case where the roughness is greater than the predetermined first roughness threshold. Light that reflects in such a uniform direction is applied to the bonding means. Therefore, the light irradiation efficiency can be improved, which is very advantageous in practice.

In another aspect of the pickup device of the present invention, the roughness that quantitatively indicates the degree of unevenness of the inclined surface is equal to or greater than a predetermined second roughness threshold.

[0018] According to this aspect, the inclined surface is, for example, blasted, and the roughness is equal to or higher than the predetermined second roughness threshold. Here, the “second roughness threshold” is determined in advance by experiment or simulation as a lower limit value of the roughness so that the direction of reflection of the curing light incident on the inclined surface is somewhat uneven. Value. At this time, the curing light incident on the inclined surface is irregularly reflected. In other words, the reflection direction of the curing light incident on the inclined surface is uneven as compared with the case where the roughness is smaller than the predetermined second roughness threshold. Therefore, Whatever the orientation of each inclined surface, at least a part of the irregularly reflected light reaches the bonding means. In other words, it is very advantageous in practice because it can alleviate the influence of the design error on the inclined surface.

In another aspect of the pickup device of the present invention, the pickup device further includes an increasing unit that is formed on at least a part of the surface of the inclined surface and increases the reflectance of the inclined surface.

[0020] According to this aspect, the increasing means such as silver coating is formed on at least a part of the surface of the inclined surface. At this time, the reflectivity of the material generally depends on the wavelength of the reflected light. Therefore, as the material for the increasing means, it is preferable to select a material having a relatively high reflectance at the wavelength of the curing light. And, this increasing means improves the reflectance of the inclined surface. That is, since the amount of light absorbed by the inclined surface can be reduced, the light irradiation efficiency is improved.

[0021] (Pickup Device Manufacturing Method)

In order to solve the above-described problems, a method for manufacturing an optical pickup device of the present invention is a manufacturing method for manufacturing a pickup device used for recording or reproduction of one or more types of optical discs. Forming a pickup body as a base, a slope forming step of forming one or a plurality of slopes in a reinforcing portion for reinforcing the rigidity of the pickup device of the pickup body, and the recording or reproducing An application step of applying a photo-curing adhesive means for adhering an optical component that emits or guides laser light to the pickup body, and an irradiation step of irradiating the pickup device with light of a predetermined wavelength. And in the irradiation step, at least a part of the irradiated light is caused by the formed inclined surface. , It is directed to the adhesive means.

[0022] According to the method for manufacturing a pickup device of the present invention, the pickup device of the present embodiment described above can be manufactured.

[0023] It should be noted that the method for manufacturing the pickup device of the present invention can adopt the same aspects as the various aspects of the pick-up device of the present invention described above.

As described above, according to the pickup device of the present invention, the pickup device includes the pickup body, the optical component, and the guiding means. Since the step forming step, the inclined surface forming step, the coating step, and the irradiation step are provided, the light irradiation efficiency to the bonding means can be improved while maintaining the rigidity of the pick-up device as much as possible. As a result, the irradiation time for irradiating the curing light is shortened, which is very advantageous in practice.

Brief Description of Drawings

FIG. 1 is an exploded perspective view of a disk device including a pickup device according to an embodiment of the present invention.

FIG. 2 is a top view of a part of the pickup device according to the present embodiment.

FIG. 3 is a perspective view of a part of the pickup device according to the present embodiment.

FIG. 4 is a flowchart conceptually showing the manufacturing method of the pickup device according to the embodiment.

FIG. 5 is a perspective view showing a state in which curing light is irradiated to a pickup device according to a comparative example.

FIG. 6 is a perspective view showing a state in which curing light is irradiated to the pickup device according to the present embodiment.

FIG. 7 is a perspective view showing a state in which curing light is irradiated to a pickup device according to a modification.

FIG. 8 is a characteristic diagram showing the wavelength dependence of the reflectance of various materials.

Explanation of symbols

[0026] 1 disk device

41 Optical disc

5 Pickup device

51 Pickup body

90 Reinforcement wall

61 Laser source

81 Laser fixing part

82 Bonding part 91 1st inclined surface

92 Second inclined surface

93 3rd inclined surface

BEST MODE FOR CARRYING OUT THE INVENTION

Hereinafter, the best mode for carrying out the present invention will be described in each embodiment in order with reference to the drawings.

[0028] (1) Embodiment of pickup apparatus

With reference to FIGS. 1 to 3, the basic structure of the pickup device according to this embodiment will be described.

[0029] First, the configuration of a disk device including the pickup device according to the present embodiment will be described with reference to FIG. FIG. 1 is an exploded perspective view of a disk device equipped with a pickup device according to an embodiment of the present invention.

In FIG. 1, a disk device 1 is a disk device that reproduces information recorded on an optical disk 41 such as a DVD or a CD, or records information on the optical disk 41. The outer case 21 and the outer case 21 An inner case 25 installed inside, a disc tray 29 on which an optical disc 41 as an optical recording medium is placed so as to be movable back and forth with respect to the inner case 25, and an optical disc 41 provided in the inner case 25 A main body 32 that reproduces or records information and a circuit board 40 that has electronic components that control the operation of the main body 32 are configured.

[0031] The outer case 21 includes an upper case 22 whose lower surface and front surface are open in FIG. 1, a lower case 23 that closes the lower surface of the upper case 22, and a decorative plate 24 that closes the front surface of the upper case 22. As a whole, it has a flat rectangular parallelepiped shape.

The inner case 25 has an upper surface and a front surface that are open, and has a bottom surface 26 that has a hole 261 in the approximate center, and a side surface 27 that is erected from the bottom surface 26.

[0033] The disc tray 29 is substantially plate-shaped and has a mounting recess 30 on the upper surface on which an optical disk 41 is mounted in a circular concave shape whose diameter increases upward. The disc tray 29 has a substantially rectangular opening 31 at a substantially central portion. The disc tray 29 is advanced and retracted by tray drive means 28 provided in the inner case 25. [0034] The main body 32 has a pedestal 33 having a hole 331 in the center and installed in the inner case 25, a rotation drive means 34 provided on the pedestal 33 for rotating the optical disc 41, and a hole in the pedestal 33. Section 33 1 Pickup device 5 that moves from one edge to the other edge and irradiates laser light to the recording portion provided on the lower surface side of the optical disc 41 and detects reflected light, and moves the pickup device 5 back and forth. The moving means 37 is provided. Here, the pedestal portion 33 is formed in a flat frame shape, and is installed such that the hole portion 331 of the pedestal portion 33 overlaps the hole portion 261 of the inner case 25. The rotation driving means 34 includes a turntable 35 on which the optical disk 41 is placed and rotated, and a spindle motor (not shown) as a power source for driving the turntable 35 to rotate. The turntable 35 includes a rotating shaft 351 that is inserted into the center hole 411 of the optical disc 41, and a flange portion 352 that protrudes in a flange shape on the outer peripheral surface of the rotating shaft 351 and on which the periphery of the shaft hole of the optical disc 41 is placed. have. When the optical disc 41 is placed on the disc tray 29 and moved to the inside of the inner case 25, the optical disc 41 is placed on the turntable 35, and the upper surface of the optical disc 41 is the side surface 27 of the inner case 25. It is pressed by a rotor 361 that is rotatably provided on a support member 36 that is cross-linked. The optical disk 41 is rotated by the driving force of the spindle motor while being sandwiched between the turntable 35 and the rotor 361. The pickup device 5 will be described later with reference to FIG. The moving means 37 includes a pair of guide shafts 38 and a moving motor 39. Each of the guide shafts 38 is disposed so as to have an axial direction from one edge to the other edge of the hole portion 331 of the base portion 33. A guide shaft 38 is passed through or engaged with the pickup device 5. The pickup device 5 is moved from one edge of the pedestal 33 to the other edge by the driving force of the moving motor 39.

The circuit board 40 is provided below the pickup device 5 with a predetermined distance from the pickup device 5. The circuit board 40 includes electronic parts that perform rotation control of the moving motor 39 and spindle motor, control of the pickup device 5, and the like.

[0036] Reading of information on the optical disc 41 by the disc apparatus 1 having the above-described configuration power will be described. First, the user places the optical disc ⁴ 1 on the disc tray 29 out-out bow I outside the disc tray 29 from the outer case 21 and inner case 25. The optical disc ⁴ 1 is housed in the disc tray 29 forces the case 25 placed. Then turntable 35 and times The optical disk 41 is sandwiched between the trochanter 361 and the optical disk 41 is rotated by the rotation of the turntable 35. At this time, a laser beam is emitted from the pickup device 5 toward the optical disc 41, and reflected light from the optical disc 41 is detected by the pickup device 5. Information is read from the optical disc 41 by detecting the reflected light. Further, the pickup device 5 irradiates a predetermined portion of the optical disc 41 with a laser beam by movement by the moving means 37. Then, predetermined information is sequentially read from the optical disc 41.

Subsequently, with reference to FIGS. 2 and 3, the structure of the pickup device 5 will be described.

FIG. 2 is a top view of a part of the pickup device according to the embodiment. FIG. 3 is a perspective view of a part of the pickup device according to the embodiment. In FIG. 3, in order to clarify the shape of the pick-up body 51, the laser light source body and other components to be finally installed are shown.

In FIG. 2, the pickup device 5 includes a pickup body 51, a reinforcing wall 90, a laser light source body 61, a laser fixing portion 81, an adhesive portion 82, an irradiation surface 83, and a plurality of inclined surfaces. Prepare.

[0039] The pickup body 51 is an example of a "pickup body" according to the present invention. . The pickup body 51 is made of a synthetic resin or a metal material such as zinc or aluminum. The pickup body 51 has optical components such as the laser light source 61 on the one side. On the other hand, it has a laser reflecting portion (not shown) for reflecting the laser beam to the optical disc 41 on the other surface side.

[0040] The reinforcing wall 90 is an example of the "reinforcing part" according to the present invention, and is relatively thick as a reinforcing part for reinforcing the rigidity of the pickup device 5 as compared with other parts. Specifically, the upper surface of the reinforcing wall 90 is formed higher than the bottom surface 95 in the Z-axis direction. The reinforcing wall 90 may be formed integrally with the pickup body 51 or may be formed as a separate part having the same or different material force as the pickup body 51.

The laser light source 61 is an example of the “optical component” according to the present invention, and emits laser light having a wavelength corresponding to the type of the optical disk. One end surface of the laser light source body 61 faces the outside from the laser light source body storage portion 56, and has a connector pin 62 to which a power cable (not shown) or the like is connected. The emitted laser light is used for various optical systems such as the multi lens 75. Light is received by the OEIC (not shown) attached to the OEIC plate 72 through the component.

The laser fixing portion 81 projects from the bottom surface 95 of the pickup body 51 in the negative direction of the Z axis. The laser fixing portion 81 may be formed integrally with the pickup body 51, or may be formed as a separate part having the same or different material force as the pickup body 51! The laser fixing portion 81 has a fixing hole 812 for fixing the laser light source body 61. The fixing hole 812 is a hole penetrating in the Y-axis direction that is equal to or slightly larger than the outer diameter of the laser light source body 61, and the laser light source body 61 is fitted therein (see FIG. 3).

The bonding portion 82 is an example of the “bonding means” according to the present invention, and bonds both the laser light source body 61 fitted in the fixing hole 812 and the side surface of the laser fixing portion 81. The bonding portion 82 is made of a light-irradiating material that is cured by a photopolymerization reaction when irradiated with curing light having a predetermined wavelength, such as ultraviolet curable resin.

The irradiation surface 83 indicates a region where the curing light is to be irradiated in the bonding portion 82. The bonding portion 82 extends along the Z-axis direction (= the predetermined height direction) where a part of the laser light source 61 and the laser fixing portion 81 are bonded. Similarly, the irradiation surface 83 extends along the Z-axis direction.

[0045] Each of the first inclined surface 91, the second inclined surface 92, and the third inclined surface 93 is an example of the "guidance means" according to the present invention, and is an inclined surface formed on the reinforcing wall 90 ( (See Figure 3). These inclined surfaces widen the irradiation space of the light irradiated on the irradiation surface 83 and reflect the light toward the irradiation surface 83.

As described above with reference to FIG. 1 to FIG. 3, according to the pickup device 5 according to the present embodiment, the first inclination is obtained while the rigidity of the pickup device 5 is held as much as possible by the reinforcing wall 90. The light irradiation efficiency on the irradiation surface 83 can be improved by the surface 91, the second inclined surface 92, and the third inclined surface 93.

(2) Example of pickup device manufacturing method

Next, referring to FIG. 4 in addition to FIGS. 1 to 3, an embodiment of a manufacturing method for manufacturing the above-described pickup device 5 will be described. FIG. 4 is a flowchart conceptually showing the manufacturing method of the pickup device according to the embodiment.

In FIG. 4, first, in a process which is an example of a “base forming process” according to the present invention, A pickup body 51 as a casing of the pickup device 5 is formed, for example, by die molding (step Sl).

[0048] Following or simultaneously with this, in the process which is an example of the "inclined surface forming process" according to the present invention, the reinforcement wall 90 for reinforcing the rigidity of the pickup device of the pickup body 51 is added to the reinforcement wall 90. A first inclined surface 91, a second inclined surface 92, and a third inclined surface 93 are formed (step S2). For example, as an inclined surface whose angle to the Z axis is 70 degrees, the upper surface force of the reinforcing wall 90 is also directed toward the irradiation surface 83, and a part of the reinforcing wall 90 is scraped off, or in such a shape. Each inclined surface is formed by mold forming designed as a certain.

[0049] Next, in a process which is an example of the "coating process" according to the present invention, an ultraviolet curable grease for bonding the laser light source body 61 as an example of an optical component to the pickup body 51. (Step S3).

[0050] Here, with reference to FIG. 5 to FIG. 8, a technical problem in the next irradiation step (step S4) for irradiating ultraviolet rays and a solution to the technical problem will be described. FIG. 5 is a perspective view showing a state where the pickup device is irradiated with the curing light according to the comparative example. FIG. 6 is a perspective view illustrating a state in which the pickup device is irradiated with curing light according to the embodiment. FIG. 7 is a perspective view showing a state where the pickup device is irradiated with curing light according to a modification. Fig. 8 is a characteristic diagram showing the wavelength dependence of the reflectance of various materials.

[0051] In Fig. 5, the reinforcing wall 901 of the pickup device 5 according to the comparative example has no inclined surface. That is, the irradiation surface 83 is surrounded by the laser fixing portion 81 and the reinforcing wall 90. Therefore, most of the curing ultraviolet ray indicated by the arrow is reflected by the upper surface of the reinforcing wall 901. That is, a technical problem may occur, such that the ultraviolet rays for curing reach the bottom surface 95 of the irradiated surface 83 and decorate.

However, in this embodiment, as shown in FIG. 6, a first inclined surface 91, a second inclined surface 92, and a third inclined surface 93 are formed. Therefore, in the step of irradiating with ultraviolet rays, at least a part of the irradiated ultraviolet rays is guided to the irradiation surface 83 by at least one inclined surface among the formed inclined surfaces. For example, this ultraviolet ray passes directly through the space secured by forming each inclined surface without being reflected, or is reflected and indirectly reflected. Therefore, it is guided to the irradiation surface 83.

In more detail, the first inclined surface 91, the second inclined surface 92, and the third inclined surface 93 are formed so as to intersect with a predetermined height direction. Therefore, the irradiation space of ultraviolet rays irradiated in the direction intersecting with the Z-axis direction (= predetermined height direction) is expanded. Therefore, more ultraviolet rays are irradiated even near the bottom surface 95 of the irradiation surface 83 than when each inclined surface is not formed. Therefore, unevenness in the curing rate on the irradiation surface 83 can be preferably eliminated.

[0054] Furthermore, in the present embodiment, the roughness of the first inclined surface 91, the second inclined surface 92, and the third inclined surface 93 may be set to be equal to or less than a predetermined first roughness threshold. Specifically, for example, in the step of forming these inclined surfaces (step S2), mirror surface processing may be performed. Then, as shown in FIG. 6, the reflection directions of the ultraviolet rays incident on these inclined surfaces are uniform as compared with the case where the roughness is larger than the predetermined first roughness threshold (see, for example, FIG. 7). . The irradiation surface 83 is irradiated with ultraviolet rays that are reflected in such a uniform direction. Therefore, the light irradiation efficiency can be improved.

[0055] On the other hand, as a modification of the present embodiment, the roughness of the first inclined surface 91, the second inclined surface 92, and the third inclined surface 93 may be greater than or equal to a predetermined second roughness threshold. Good. Specifically, for example, blasting may be performed in the step of forming these inclined surfaces (step S2). Then, as shown in FIG. 7, the reflection direction of ultraviolet light incident on these inclined surfaces is smaller than the case where the roughness is smaller than a predetermined second roughness threshold (see, for example, FIG. 6). , It will be uneven. Accordingly, at least part of the irregularly reflected ultraviolet rays reaches the irradiation surface 83 regardless of the direction of each inclined surface. That is, the influence of the design error of each inclined surface can be reduced.

[0056] Furthermore, in this embodiment, a coating for improving the reflectance may be formed on at least a part of the surfaces of these inclined surfaces. Specifically, for example, in the step of forming these inclined surfaces (step S2), a predetermined type of material may be coated on the surface of each inclined surface. Here, as shown in FIG. 8, in general, the reflectance of a material depends on the wavelength of the reflected light. Therefore, as the predetermined type of material, a material having a relatively high reflectance at the wavelength of the curing light may be selected. For example, as shown in FIG. 8, when ultraviolet light having a wavelength of 350 nm is used as light for curing, silver has the highest reflectance among gold “silver” copper, so it is better to paint silver. With this silver coating, the reflectance of the inclined surface against ultraviolet rays is reduced. To increase. That is, since the amount of ultraviolet rays absorbed by the inclined surface can be reduced, the light irradiation efficiency is improved, which is very advantageous in practice.

Returning to FIG. 4 again, the pick-up device 5 is irradiated with curing ultraviolet rays (step S4). At this time, since each inclined surface is formed as described above, the light irradiation efficiency is improved and the time required for curing is shortened.

As described above, according to the present embodiment, while the rigidity of the pickup device 5 is kept as much as possible by the reinforcing wall 90, the irradiation surface 83 is formed by the first inclined surface 91, the second inclined surface 92, and the third inclined surface 93. In contrast, the light irradiation efficiency can be improved.

[0059] In the above-described embodiment, the force with three inclined surfaces is not necessarily limited to this number.

That is, with at least one, the curing of the present invention can be enjoyed to a greater or lesser extent. Further, the position of the inclined surface is not limited to the above-mentioned location, but depends on the location of the bonded portion. For example, when adhering optical components such as the pick-up body 51 and a half mirror (not shown), for example, when adhering with the above-described light irradiating material, an inclined surface may be formed in the vicinity of the adhering portion. .

[0060] The present invention is not limited to the above-described embodiments, and can be appropriately changed without departing from the spirit or idea of the invention that can be read from the claims and the entire specification, and is accompanied by such changes. The pickup device and the manufacturing method thereof are also included in the technical scope of the present invention.

Industrial applicability

The pickup device and the manufacturing method thereof according to the present invention can be used for, for example, high-density optical discs such as DVDs, and can be used for information recording devices such as DVD recorders. The present invention can also be used for an information recording device or the like that is mounted on or connectable to various computer equipment for consumer use or business use.

Claims

The scope of the claims

[1] A pickup device for recording or reproduction of one or more types of optical discs, the pickup body as a housing of the pickup device,

An optical component that is bonded to the pickup body by a photo-curable bonding means and emits or guides a laser beam for recording or reproduction; and

One or a plurality of inclined surfaces formed in a reinforcing portion for reinforcing the rigidity of the pickup device of the pickup body, and at least a part of light having a predetermined wavelength irradiated to the pickup device. A pickup device comprising: guide means for guiding the adhesive means.

[2] The pickup body further includes a fixing portion protruding in a predetermined height direction of the bottom surface force of the pickup body in order to fix the optical component,

The bonding means extends along the predetermined height direction,

The reinforcing portion protrudes along the predetermined height direction,

The inclined surface is formed to intersect the predetermined height direction.

The pickup device according to claim 1, wherein

[3] Roughness quantitatively indicating the degree of unevenness of the inclined surface is not more than a predetermined first roughness threshold.

The pickup device according to claim 1 or 2, wherein

[4] The roughness that quantitatively indicates the degree of unevenness of the inclined surface is equal to or greater than a predetermined second roughness threshold.

The pickup device according to claim 1 or 2, wherein

[5] The apparatus further includes an increasing unit that is formed on at least a part of the surface of the inclined surface and increases the reflectance of the inclined surface.

The pickup device according to claim 1 or 2, wherein

[6] A manufacturing method for manufacturing a pickup device for recording or reproduction of one or more types of optical discs,

A base forming step of forming a pickup body as a casing of the pickup device; An inclined surface forming step of forming one or a plurality of inclined surfaces in a reinforcing portion for reinforcing the rigidity of the pickup device of the pickup body;

A coating step of applying a photo-curing adhesive means for adhering an optical component for emitting or guiding a laser beam used for recording or reproduction to the pickup body;

An irradiation step of irradiating the pickup device with light of a predetermined wavelength, wherein at least a part of the irradiated light is guided to the bonding means by the formed inclined surface in the irradiation step. Be done

A method of manufacturing a pickup device.