CN100468540C - Optical pickup unit - Google Patents

Abstract

An optical pickup apparatus comprises a photo detector that receives light reflected from a medium; and a housing that is mounted with the photo detector. The photo detector is fixed to the housing with the use of an adhesive to mount the photo detector on the housing. The housing is provided with a displacement preventer that prevents displacement of the photo detector or the adhesive relative to the housing. The displacement preventer has fixing portions that extend along a plurality of directions. The photo detector is mounted on the housing by applying the adhesive to the displacement preventer.

Description

Optical take-up apparatus

The mutual reference of related application

The application requires to be willing to that in the Japanese patent application laid of on June 20th, 2005 application 2005-179041 and the Japanese patent application laid of applying on June 12nd, 2006 be willing to the right of priority of 2006-162175, referring among the application as a reference in their content.

Technical field

For example the present invention relates to be installed in the optical disc apparatus, can read the optical take-up apparatus of the information of media such as CD.

Background technology

Fig. 4 is the oblique view of a kind of form of the optical take-up apparatus before the expression.

Photodetector 510 is installed in the shell 550.Shell is meant that box-shaped object of storage member etc. puts into the case of article and similarly install with case.

Photodetector 510 is a part of reflected light that receive from CD (not shown), generates and the proportional photodetector 510 that is subjected to photocurrent of this light income.Be subjected to photocurrent as detection signal this.Photodetector 510 receives light, and this signal is become electric signal, and output is used to make the signal of servo control mechanism (not shown) action of the lens retainer (not shown) of optical take-up apparatus 501.Servo or servo control mechanism are meant the state of measuring the parts of making controlling object, and measurement result and reference value are compared, and proofread and correct the mechanism of control automatically.(Photo Detector) abbreviates " PD " as with photodetector.This photodetector 510 is connected with flexible circuit body 505.And, this photodetector 510 is fixed on the plate 520.

Operation when being installed in photodetector 510 in the shell 550 describes.At first, adjust the light path position of photodetector 510.The light path (not shown) that forms in the opposite shell 550, X-axis, the Y-axis of photodetector 510 and the Z axle of photodetector 510 of adjustment photodetector 510.After opposite shell 550 is carried out the installation site adjustment of photodetector 510, between plate 520 that photodetector 510 has been installed and shell 550, apply the fixedly bonding agent of usefulness (not shown) in the mode of building bridge.At this moment,, improve the cohesive of 520 pairs of shells 550 of plate, in fixed part 580A, the 580B of shell 550, ditch 581 is set with photodetector 510 in order to make the bonding agent performance consolidation effect after the sclerosis.

As with former optical take-up apparatus 501 similar parts shown in Figure 4, have the photodetector erecting device of the optical head that the labile factor of the positional precision for example make photodetector alleviates.

And, as this existing apparatus, for example be disclosed in the TOHKEMY 2002-251776 communique (the 3rd page, Fig. 1, Fig. 2).

But, for described existing optical take-up apparatus 501 shown in Figure 4, because only a direction along directions X extends ditch 581, so, may produce offset at stick portion 580A, 580B for the vibration optical take-up apparatus 501 that wait severe use/environment to use down more.If produce offset at stick portion 580A, 580B, then light can correctly not incide in the photodetector 510.Consequently, may produce the such problem of optical take-up apparatus 501 cisco unity malfunctions.

Summary of the invention

The objective of the invention is to,, also can in photodetector, not produce the optical take-up apparatus that operating stably is carried out on offset ground even provide under the use/environment of sternness.

The present invention who mainly solves described problem is an optical take-up apparatus, has reception from the photodetector of the light of media reflection with the shell of this photodetector is installed.Utilization is installed in bonding agent in this shell with photodetector, this photodetector is fixed in this shell, in this shell, offset is set and prevents portion, prevent the offset of this photodetector or this bonding agent with respect to this shell, this offset portion of preventing has the fixed part that extends along a plurality of directions, prevent in the portion by this bonding agent is coated in this offset, this photodetector is installed in this shell.

Utilize described structure, prevent that by bonding agent and offset portion is fixed on photodetector in the shell reliably.Prevent that this photodetector or this bonding agent from preventing portion with respect to the offset of the offset of this shell because in shell, be provided with, this offset portion of preventing has the fixed part that extends along a plurality of directions, even, also can avoid photodetector to cause the generation of the problem that offset, optical take-up apparatus malfunction are such with respect to shell so for example on optical take-up apparatus, apply fierce vibration.The offset that utilization is bonded in shell prevents the bonding agent in the portion, and photodetector is fixed on the shell.Therefore, even can provide under the use/environment of sternness, can in photodetector, not produce the optical take-up apparatus that operating stably is carried out on offset ground yet.

And in optical take-up apparatus of the present invention, the described offset portion of preventing has: first fixed part that extends along first direction and second fixed part that extends along the second direction that is different from first direction.

According to described structure, photodetector utilizes bonding agent and is arranged on first fixed part and second fixed part that offset in the shell prevents portion, is fixed in the shell reliably.Because extend along different directions along first direction first fixed part that extends and second fixed part that extends along second direction, even so apply complicated vibration on optical take-up apparatus, photodetector also can continue to be fixed on reliably on first fixed part and second fixed part by bonding agent.First fixed part that extends along first direction and prevent that along second fixed part performance that second direction extends photodetector from producing the function of the detent of offset with respect to shell.

And in optical take-up apparatus of the present invention, with respect to described first fixed part that extends along described first direction, described second fixed part that extends along described second direction forms along prolonging with its vertical substantially direction.

According to described structure, photodetector utilizes bonding agent and is arranged on first fixed part and second fixed part that offset in the shell prevents portion, is fixed in the shell reliably.Because with respect to described first fixed part that extends along described first direction, described second fixed part that extends along described second direction forms along prolonging with its vertical substantially direction, so when having avoided on optical take-up apparatus, applying complicated vibration, with respect to the shell of optical take-up apparatus, in photodetector, produce offset.For example, even in optical take-up apparatus, produce resonance, photodetector also can pass through bonding agent, utilization is arranged on first fixed part that offset in the shell prevents portion, with the first direction that extends with respect to first fixed part, prolong second fixed part that forms along perpendicular substantially second direction, continue reliably to be fixed in the shell.

And in optical take-up apparatus of the present invention, described first direction is the optical axis direction that is mapped to the described light on the described photodetector, and described second direction is the direction of the shadow surface when this light is mapped on this photodetector.

According to described structure, avoid the generation of following problems reliably, that is, the vibration of complexity is applied on the optical take-up apparatus, the result produces offset with respect to the shell of optical take-up apparatus in photodetector, and optical take-up apparatus can operate as normal.Because the offset that is arranged in the shell prevents that first fixed part of portion from extending along the optical axis direction that is mapped to the light on the photodetector, so when avoiding in optical take-up apparatus producing resonance, in photodetector, produce offset along the shadow surface of photodetector.When the power along the direction of the shadow surface of photodetector is applied on the photodetector, utilize the offset that extends along the optical axis direction of photodetector to prevent first fixed part of portion, be suppressed along the power of the direction of the shadow surface of photodetector.And, because being arranged on second fixed part that offset in the shell the prevents portion shadow surface when light is mapped on the photodetector extends, so when avoiding in optical take-up apparatus producing resonance, in photodetector, produce offset along the optical axis direction of photodetector.In the time will being applied on the photodetector along the power of the optical axis direction of photodetector, the offset that is extended by the shadow surface along photodetector prevents that second fixed part of portion from suppressing along the power of the optical axis direction of photodetector.Therefore, avoided the generation of following problems reliably, that is, owing to produce resonance in optical take-up apparatus, the shell with respect to optical take-up apparatus in photodetector produces offset, and optical take-up apparatus can operate as normal as a result.

And in optical take-up apparatus of the present invention, the described offset portion of preventing also has the isolation part that separates described first fixed part and second fixed part.

Utilize described structure, prevent that reliably the shell with respect to optical take-up apparatus produces offset in photodetector.Because the offset in being arranged on shell prevents to have the isolation part that separates two fixed parts between first fixed part of portion and second fixed part, so when utilizing bonding agent to be installed in photodetector in the shell, bonding agent is placed into the isolation part between first fixed part and second fixed part.Thereby reliably photodetector is bonded on the shell.By in the isolation part that separates first fixed part and second fixed part, putting into bonding agent, even the vibration of fierceness is applied on the optical take-up apparatus from all directions, first fixed part, second fixed part that offset prevents portion and the bonding agent that separates the isolation part of two fixed parts are put in utilization, avoid producing in photodetector offset.Therefore, can provide the optical take-up apparatus of carrying out operating stably.

And in optical take-up apparatus of the present invention, the described offset portion of preventing also has the 3rd fixed part, and it extends along being different from described first direction and being different from the third direction of stating second direction.

Utilize described structure, more reliably photodetector is fixed on the shell.The offset that is arranged in the shell of optical take-up apparatus prevents portion because have first fixed part, second fixed part and the 3rd fixed part that extends along all directions, so even fierce vibration is applied on the optical take-up apparatus, photodetector also can utilize first fixed part, second fixed part, the 3rd fixed part and bonding agent, continues to be fixed on the shell reliably.Therefore, even under the use/environment of sternness, use optical take-up apparatus, also can avoid photodetector to produce offset, in optical take-up apparatus, produce job failure with respect to shell.

And, in optical take-up apparatus of the present invention, with respect to described first fixed part that extends along described first direction and described second fixed part that extends along described second direction, described the 3rd fixed part that extends along third direction forms along prolonging with their vertical substantially directions.

According to described structure, photodetector utilizes bonding agent and is arranged on first fixed part, second fixed part and the 3rd fixed part that offset in the shell prevents portion, is fixed in the shell reliably.Because with respect to first fixed part that extends along first direction, with second fixed part that extends along second direction, the 3rd fixed part that extends along third direction forms along prolonging with their vertical substantially directions, so in the time of can avoiding reliably applying complicated vibration on optical take-up apparatus, photodetector produces offset with respect to the shell of optical take-up apparatus.For example, even in optical take-up apparatus, produce resonance, photodetector also can pass through bonding agent, utilization is arranged on first fixed part that offset in the shell prevents portion, with second fixed part that forms along the second direction prolongation vertical substantially with respect to first direction, the 3rd fixed part with the third direction vertical substantially with respect to first direction and second direction extends continues to be fixed in the shell reliably.

And in optical take-up apparatus of the present invention, described third direction is the direction of the shadow surface when described light is mapped on the described photodetector.

According to described structure, avoid the generation of following problems, that is, the vibration of complexity is applied on the optical take-up apparatus, the result produces offset with respect to the shell of optical take-up apparatus in photodetector, and optical take-up apparatus can operate as normal.Because being arranged on the 3rd fixed part that offset in the shell the prevents portion shadow surface when light is mapped on the photodetector extends, so when having avoided producing resonance in optical take-up apparatus, the optical axis direction along photodetector in photodetector produces offset.In the time will being applied on the photodetector along the power of the optical axis direction of photodetector, utilize the offset that extends along the shadow surface of photodetector to prevent the 3rd fixed part of portion, further suppress along the power of the optical axis direction of photodetector.

And in optical take-up apparatus of the present invention, the described offset portion of preventing also has the isolation part that separates described first fixed part and the 3rd fixed part.

Utilize described structure, prevent that further the shell with respect to optical take-up apparatus produces offset in photodetector.Because the offset in being arranged on shell prevents to have the isolation part that separates two fixed parts between first fixed part of portion and the 3rd fixed part, so when utilizing bonding agent to be installed in photodetector in the shell, bonding agent is placed into the isolation part between first fixed part and the 3rd fixed part.Thereby reliably photodetector is bonded on the shell.By putting into bonding agent in the isolation part that separates first fixed part and the 3rd fixed part, even the vibration of fierceness is applied on the optical take-up apparatus from all directions, first fixed part, the 3rd fixed part that offset prevents portion and the bonding agent that separates the isolation part of two fixed parts are put in utilization, further avoid producing in photodetector offset.Therefore, can provide the optical take-up apparatus of carrying out operating stably.

And in optical take-up apparatus of the present invention, described fixed part has the ditch that can put into described bonding agent.

Utilize described structure, photodetector is fixed on the shell reliably.By bonding agent being put into the ditch that the offset that is arranged on shell prevents the fixed part in the portion, with respect to shell fixed light detecting device reliably.Because put into the bonding agent performance consolidation effect of ditch and sclerosis, so bonding agent is fixed in the ditch reliably.Consolidation effect is meant that the bonding agent intrusion is positioned at the lip-deep space and the sclerosis of bonded material, exercises the effect of nail and wedge.Consolidation effect is also referred to as cast anchor effect or fastening effect.Because put into the bonding agent performance consolidation effect of ditch and sclerosis, so, also can avoid in bonding agent, producing offset even the vibration of fierceness is applied on the shell of optical take-up apparatus.Therefore, utilize the offset put into shell to prevent the bonding agent of ditch of the fixed part of portion, photodetector is fixed on the shell reliably.

And in optical take-up apparatus of the present invention, the described offset portion of preventing is arranged on from the outstanding teat that is provided with of described shell.

Utilize described structure, photodetector is installed on the shell reliably.When making photodetector be fixed on the shell, prevent from the portion photodetector to be installed on the shell reliably by applying adhesive to from the offset of the outstanding teat that is provided with of shell.And, by from the outstanding teat that is provided with of shell, carry out easily and be used for photodetector is installed in bonding agent coat operations on the shell.Have the teat that the offset that is used for applying adhesive prevents portion by outstanding setting the on shell, avoid the generation of photodetector easily with respect to the offset of shell.

In optical take-up apparatus of the present invention, described photodetector is installed in and makes this photodetector with respect on the definite fixed head in the position of described shell easily, and the described offset that described bonding agent is coated in this fixed head and this shell prevents in the portion.

Utilize described structure, photodetector accurately is installed on the shell.When utilizing bonding agent to be installed in photodetector on the shell, if photodetector is installed on the fixed head, then operation is determined in the position of carrying out easily when with respect to shell photodetector being installed.When being installed to photodetector on the shell, for example by continuing to carry out the light path adjustment, and carry out the installation site adjustment of fixed head with respect to shell with photodetector, determine after the installation site of fixed head, the offset that bonding agent is coated in fixed head and shell prevents in the portion, thereby accurately photodetector is installed on the shell.

And, in optical take-up apparatus of the present invention,, utilize the UV cured type bonding agent that hardens by the ultraviolet ray irradiation as described bonding agent.

Utilize described structure, photodetector is fixed on rapidly and accurately on the shell, the only sclerosis when ultraviolet ray shines on the bonding agent of coating of UV cured type bonding agent.When being installed to photodetector on the shell, if utilize UV cured type bonding agent, then the curing of bonding agent is carried out rapidly.Therefore, in the process of bonding agent sclerosis, avoided in photodetector, producing offset, photodetector correctly can be installed in the shell with respect to shell.

And, in optical take-up apparatus of the present invention,, adopt the epoxy resin bonding agent as described bonding agent.

Utilize described structure, photodetector accurately is fixed on the shell.The epoxy resin bonding agent has good low-shrinkage and thermotolerance etc.The epoxy resin bonding agent is because be the low material that shrinks, so with respect to shell photodetector is installed accurately.And, because the good heat resistance of epoxy resin bonding agent, so when the shell of for example optical take-up apparatus became high temperature, influence and the extreme of having avoided bonding agent to be subjected to heat went bad.Even when optical take-up apparatus becomes high temperature, photodetector also utilizes the epoxy resin bonding agent to continue accurately to be installed on the shell.

And, in optical take-up apparatus of the present invention, can be installed in the optical disc apparatus of the computing machine that moves easily.

Utilize described structure, avoided the generation of following problems, promptly the computing machine that moves easily produces action failure with the optical take-up apparatus of optical disc apparatus, the computing machine malfunction that the result moves easily.As the computing machine that moves easily, enumerate for example portable computer, notebook computer.The such computing machine that moves easily of portable computer or notebook computer exists miniaturization, lightening, light-weighted tendency, thereby optical take-up apparatus also exists miniaturization, lightening, light-weighted tendency.For example, when moving the computing machine that moves easily, even the vibration of fierceness is applied on the computing machine, also can avoid the generation of following problems, promptly photodetector produces offset, optical take-up apparatus malfunction with respect to the shell of optical take-up apparatus.The offset that the photodetector utilization is bonded in shell prevents the bonding agent in the portion, continues to be fixed on the shell.Therefore, applying under the such sternness use/environment of fierce vibration, also can carry out the small light and thin optical take-up apparatus of operating stably even can provide.

Description of drawings

In order more fully to understand the present invention and advantage thereof, in conjunction with the accompanying drawings with reference to following explanation.

Fig. 1 is the oblique view of a kind of embodiment of expression optical take-up apparatus of the present invention.

Fig. 2 is the amplification view that the offset of expression optical take-up apparatus prevents portion.

Fig. 3 is the amplification key diagram that the offset of expression optical take-up apparatus prevents portion equally.

Fig. 4 is the oblique view of a kind of form of the optical take-up apparatus before the expression.

Embodiment

According to the record of this instructions and accompanying drawing, at least can clearly following item.

Fig. 1 is the oblique view of a kind of embodiment of expression optical take-up apparatus of the present invention, and Fig. 2 is the amplification key diagram that the offset of expression optical take-up apparatus prevents portion, and Fig. 3 is the amplification view that the offset of expression optical take-up apparatus prevents portion equally.

As Fig. 1～shown in Figure 3, be the depth direction of optical take-up apparatus 1 along the direction of X-X axle.As depicted in figs. 1 and 2, the direction along the Y-Y axle is the short transverse of optical take-up apparatus 1.As shown in figures 1 and 3, the direction along the Z-Z axle is the Width of optical take-up apparatus 1.And in Fig. 2, the direction vertical with respect to paper is the Z-Z direction of principal axis of optical take-up apparatus 1.And in Fig. 3, the direction vertical with respect to bottom surface is the Y-Y direction of principal axis of optical take-up apparatus 1.The definition of all directions X, Y, Z optical take-up apparatus 1 and carrying out for convenience of description in this instructions.

In optical disc apparatus (not shown), insert various CDs various media (not shown) such as (not shown).Utilization is installed in the optical take-up apparatus 1 in the optical disc apparatus, carries out being recorded in the regeneration of the data such as information on the CD.As CD, for example enumerating, " CD-ROM ", " DVD-ROM " etc. read special-purpose CD, " CD-R ", " DVD-R ", " DVD+R " etc. can write CD and " CD-RW ", " DVD-RW ", " DVD+RW " (registered trademark), " DVD-RAM ", " HDDVD " (registered trademark), " blu-rayDisc " (registered trademark) etc. can write/erase and the CD of rewriting type etc.

And, as CD, for example also enumerate at the two sides of CD signalization face (not shown), can carry out the CD (not shown) of data write/erase and data rewrite etc.And, as CD, also enumerate the signal face (not shown) that for example is provided with two layers, can carry out the CD (not shown) of data write/erase and data rewrite etc.

" CD " is the abbreviation of " Compact Disc " (trade mark)." DVD " (registered trademark) is the abbreviation of " DigitalVersatile Disc (CD is used in digitizing more) " or " Digital Video Disc (Digital video disc) "." ROM " of " CD-ROM " or " DVD-ROM " is the abbreviation of " Read Only Memory (ROM (read-only memory)) ", and CD-ROM or DVD-ROM are that data are read special-purpose device." R " of " CD-R ", " DVD-R " or " DVD+R " is the abbreviation of " Recordable " (recordable), and CD-R, DVD-R or DVD+R are the devices that can write data." RW " of " CD-RW ", " DVD-RW " or " DVD+RW " is the abbreviation of " Rewritable " (rewritable), and CD-RW, DVD-RW or DVD+RW are the devices that can carry out data rewrite." DVD-RAM " is the abbreviation of " Digital Versatile Disc Random Access Memory (Digital video disc random access memory) ", is the device that can read and write obliterated data.

HD DVD is the abbreviation of " High Definition DVE (high-definition DVD) "." HDDVD " and former DVD series have interchangeability, and bigger than the memory capacity of the disk of former DVD series.CD in the past adopts redness/near-infrared laser.And former DVD adopts red laser.But, on the CD 200 that reads HD DVD, during the data/information of record, adopt bluish violet color laser." Blu-ray " is meant the red laser that used with respect to former signal read-write, the bluish violet color laser that adopts in order to realize high density recording.

As shown in Figure 1, photodetector 10 is installed in the shell 50 that die casting is made.A part of reflected light that photodetector 10 receives from not shown CD generates and the proportional photocurrent that is subjected to of this light income.Be subjected to photocurrent as detection signal this.Photodetector 10 receives laser, and this signal is become electric signal, and output is used to make the signal of servo control mechanism (not shown) action of the lens retainer (not shown) of optical take-up apparatus 1.Photodetector is called PD or PDIC.PDIC is the " abbreviation of Photo Diode IC photodiode IC.This PDIC10 is installed on the fixed head 20 of aluminum.And this PDIC 10 can be connected on the flexible base, board 5 with switching on.

This flexible base, board 5 forms as flexible print circuit.Flexible print circuit (Flexible PrintedCircuit) abbreviates FPC as.FPC is printed on (not shown) on the insulating thin with a plurality of circuit conductors (not shown), for example metal forming (not shown) such as Copper Foil is set up in parallel on insulating thin, transparent or translucent protective seam (not shown) is set in the above and constitutes.For convenience, illustrate the FPC5 of the return conductors that has omitted insulating thin.

Optical take-up apparatus 1 has described various parts.Optical take-up apparatus 1 also has other parts (not shown) except that illustrated parts, but in Fig. 1～Fig. 3, for simplicity, has omitted other parts.

As shown in Figure 1, optical take-up apparatus 1 has: receive PDIC10, the plate 20 of PDIC10 is installed from CD media (not shown) laser light reflected such as (not shown), and the shell 50 that the plate 20 with PDIC10 is installed.

Utilization makes the plate 20 with PDIC10 be installed in bonding agent 91,92,93 (Fig. 2, Fig. 3) in the shell 50, and the plate 20 that will have PDIC10 is fixed in the shell 50.Each bonding agent 91,92,93 adopts the material of same kind.A pair of offset is set in shell 50 prevents the 80A of portion, 80B (Fig. 1), prevent to have the plate 20 of PDIC10 or bonding agent 91,92,93 the offsets of solidifying with respect to shell 50.Every offset is shifted elsewhere for garrison duty, and only the 80A of portion, 80B have a plurality of fixed parts 81,82,83 that extend along a plurality of direction X, Y, Z. End applying adhesive 91,92,93 (Fig. 2, Fig. 3) on the 80A of portion, the 80B by being shifted elsewhere for garrison duty in every offset, the plate 20 that will have PDIC10 is installed in the shell 50.

Be installed in the shell 50 if will have the plate 20 of PDIC10 like this, then can utilize bonding agent 91,92,93 and the offset that is arranged in the shell 50 prevents the 80A of portion, 80B, the plate 20 that will have PDIC10 is fixed in the shell 50 reliably.

Because being set, a pair of offset prevents the 80A of portion, 80B in shell 50, prevent to have the plate 20 of PDIC10 or bonding agent 91,92,93 the offsets of solidifying with respect to shell 50, every offset is shifted elsewhere for garrison duty, and only the 80A of portion, 80B have a plurality of fixed parts 81,82,83 that extend along a plurality of direction X, Y, Z, even so for example on optical take-up apparatus 1, apply fierce vibration, also can avoid the generation of following problems, the plate 20 that promptly has PDIC10 produces offset, optical take-up apparatus 1 malfunction with respect to shell 50.Utilize the offset of shell 50 to prevent last each the bonding bonding agent 91,92,93 of the 80A of portion, 80B, the plate 20 that will have PDIC10 is fixed in the shell 50.

Therefore, can the assembler etc. that the optical take-up apparatus 1 that does not produce the operating stably of offset in the plate 20 with PDIC10 offers the user of optical take-up apparatus 1 or has the optical disc apparatus (not shown) of optical take-up apparatus 1 will can carried out also under the use/environment of sternness.

Being arranged on every offset in the shell 50 is shifted elsewhere for garrison duty and ends the 80A of portion, 80B (Fig. 1) and have each first fixed part 81a, 81b, 81c, 81d, 81e, 81f, the 81g (Fig. 2) that extends along first direction X and each the second fixed part 82a, the 82b that extends along the second direction Y that is different from first direction X.

If being shifted elsewhere for garrison duty, the every offset of such formation ends the 80A of portion, 80B, the plate 20 that then has PDIC10 utilizes each bonding agent 91,92,93, is arranged on each first fixed part 81a, 81b, 81c, 81d, 81e, 81f, 81g and each the second fixed part 82a, 82b that the every offset in the shell 50 is shifted elsewhere for garrison duty and is ended the 80A of portion, 80B, is fixed on reliably in the shell 50.

Because each the first fixed part 81a that extends along first direction X, 81b, 81c, 81d, 81e, 81f, 81g and extend along different directions along each the second fixed part 82a, 82b that second direction Y extends, even so the vibration of complexity is applied on the optical take-up apparatus 1, the plate 20 with PDIC10 also can continue reliably to be fixed on each first fixed part 81a, 81b, 81c, 81d, 81e, 81f, 81g and each the second fixed part 82a, the 82b by each bonding agent 91,92,93.Each the first fixed part 81a that extends along first direction X, 81b, 81c, 81d, 81e, 81f, 81g and each the second fixed part 82a, 82b performance of extending along second direction Y are as preventing to have the function of the plate 20 of PDIC10 with respect to the detent of the offset of shell 50.

Be arranged on every offset on a pair of teat 70A, the 70B and be shifted elsewhere for garrison duty and end part that the 80A of portion, 80B be positioned at PDIC10, form substantially symmetrically as the center.

With respect to each the first fixed part 81a, 81b, 81c, 81d, 81e, 81f, the 81g that extend along first direction X, each the second fixed part 82a, 82b of extending along second direction Y form along prolonging with its vertical substantially direction.

In such a way, the plate 20 with PDIC10 utilizes each bonding agent 91,92,93, the offset that is arranged in the shell 50 prevents that each first fixed part 81a, 81b, 81c, 81d, 81e, 81f, 81g and each the second fixed part 82a, the 82b of the 80A of portion, 80B are fixed in the shell 50 reliably.Because with respect to each the first fixed part 81a, 81b, 81c, 81d, 81e, 81f, the 81g that extend along first direction X, each the second fixed part 82a, 82b of extending along second direction Y form along prolonging with its vertical substantially direction, so when having avoided vibration with complexity to be applied on the optical take-up apparatus 1, the shell 50 with respect to optical take-up apparatus 1 in the plate 20 with PDIC10 produces offsets.

For example, even in optical take-up apparatus 1, produce resonance, plate 20 with PDIC10 also can pass through each bonding agent 91,92,93, by being arranged on each first fixed part 81a, 81b, 81c, 81d, 81e, 81f, the 81g that offset in the shell 50 prevents the 80A of portion, 80B, with the first direction X that extends with respect to each first fixed part 81a, 81b, 81c, 81d, 81e, 81f, 81g, along prolonging each the second fixed part 82a, the 82b that forms, continue reliably to be fixed in the shell 50 with its vertical substantially second direction Y.

Described first direction X (Fig. 1) is the optical axis direction that is mapped to the laser of PDIC10.Described second direction Y is the direction of the shadow surface when laser is mapped to PDIC10.

Thereby, avoided the generation of following problems reliably, that is, the vibration of complexity is applied on the optical take-up apparatus 1, the result produces offsets, optical take-up apparatus 1 malfunction with respect to shell 50 in the plate 20 with PDIC10.

Because the offset that is arranged in the shell 50 prevents that each first fixed part 81a, 81b, 81c, 81d, 81e, 81f, the 81g of the 80A of portion, 80B from extending along the optical axis direction of the laser that is mapped to PDIC10, so when having avoided producing resonance in optical take-up apparatus 1, the shadow surface along PDIC10 in the plate 20 with PDIC10 produces offset.

In the time will being applied on the plate 20 with PDIC10 along the power of the direction of the shadow surface of PDIC10, the offset that is extended by the optical axis direction along PDIC10 prevents each first fixed part 81a, 81b, 81c, 81d, 81e, 81f, the 81g of the 80A of portion, 80B, suppresses along the power of the direction of the shadow surface of PDIC10.

And, because being arranged on the direction of each the second fixed part 82a, 82b that offset in the shell 50 prevents the 80A of portion, 80B shadow surface when laser is mapped to PDIC10 extends, so when having avoided producing resonance in optical take-up apparatus 1, the optical axis direction along PDIC10 in the plate 20 with PDIC10 produces offset.

In the time will being applied on the plate 20 with PDIC10 along the power of the optical axis direction of PDIC10, the offset that is extended by the shadow surface along PDIC10 prevents each the second fixed part 82a, 82b of the 80A of portion, 80B, suppresses along the power of the optical axis direction of PDIC10.

Therefore, avoided the generation of following problems reliably, that is, owing to produce resonance in optical take-up apparatus 1, the shell 50 with respect to optical take-up apparatus 1 in the plate 20 with PDIC10 produces offset, optical take-up apparatus 1 malfunction as a result.

As shown in Figure 2, offset prevents that the 80A of portion (80B) also has the first isolation part 85a, 85b, the 85c that separates the first fixed part 81a, 81b, 81c and the second fixed part 82a, 82b.

Have the first isolation part 85a, 85b, 85c if offset on the throne is shifted elsewhere for garrison duty to end among the 80A of portion, the 80B, prevent reliably that then the shell 50 with respect to optical take-up apparatus 1 produces offset in the plate 20 with PDIC10.Because preventing to have between the first fixed part 81a, 81b, 81c and the second fixed part 82a, the 82b of the 80A of portion, 80B, the offset in being arranged on shell 50 separates two fixed part 81a, 81b, 81c, the first isolation part 85a of 82a, 82b, 85b, 85c, so when the plate 20 that utilizes bonding agent 91 will have PDIC10 was installed in the shell 50, bonding agent 91 was between the first isolation part 85a between the first fixed part 81a, 81b, 81c and the second fixed part 82a, the 82b, 85b, 85c.

Thereby the plate 20 with PDIC10 is fixed in the shell 50 reliably.By making bonding agent 91 between the first isolation part 85a that isolates the first fixed part 81a, 81b, 81c and the second fixed part 82a, 82b, 85b, 85c, even apply fierce vibration for optical take-up apparatus 1 from all directions, also can utilize skew to prevent the first fixed part 81a, 81b, 81c, the second fixed part 82a, 82b of the 80A of portion, 80B and, avoid in plate 20, producing offset with PDIC10 between isolating two fixed part 81a, 81b, 81c, the first isolation part 85a of 82a, 82b, the bonding agent 91 between 85b, the 85c.Therefore, the optical take-up apparatus 1 of carrying out operating stably can be offered the user of optical take-up apparatus 1 or have the assembler etc. of the optical disc apparatus (not shown) of optical take-up apparatus 1.

Be arranged on offset in the shell 50 and prevent that the 80A of portion, 80B also have along being different from first direction X and being different from the 3rd fixed part 83a, the 83b that the third direction Z of second direction Y extends.

Have the 3rd fixed part 83a, 83b because offset on the throne is shifted elsewhere for garrison duty to end on the 80A of portion, the 80B, can more reliably the plate 20 with PDIC10 be fixed in the shell 50.Because the offset that is arranged in the shell 50 of optical take-up apparatus 1 prevents the 80A of portion, 80B has the first fixed part 81a that extends along all directions, 81b, 81c, 81d, 81e, 81f, 81g, the second fixed part 82a, 82b, with the 3rd fixed part 83a, 83b, even so apply fierce vibration for optical take-up apparatus 1, also can utilize each first fixed part 81a, 81b, 81c, 81d, 81e, 81f, 81g, the second fixed part 82a, 82b, the 3rd fixed part 83a, 83b and each bonding agent 91,92,93, the plate 20 that will have PDIC10 continues to be fixed in the shell 50 reliably.Therefore,, also can avoid in plate 20, producing offset, produce job failure at optical take-up apparatus 1 with respect to shell 50 with PDIC10 even under the use/environment of sternness, use optical take-up apparatus 1.

With respect to each the first fixed part 81a, 81b, 81c, 81d, 81e, 81f, the 81g that extend along first direction X, with each the second fixed part 82a, the 82b that extends along second direction Y, each the 3rd fixed part 83a, the 83b that extends along third direction Z from bight 75a, the 75b of shell 50 outstanding teat 70A, the 70B that are provided with along be bending when the vertical substantially direction of described each first fixed part and second fixed part is extended and prolong and form.

Have the plate 20 of PDIC10 and prevent that by each bonding agent 91,92,93 of curing, the offset that is arranged in the shell 50 each first fixed part 81a, 81b, 81c, 81d, 81e, 81f, 81g, each the second fixed part 82a, 82b and the 3rd fixed part 83a, the 83b of the 80A of portion, 80B are fixed in the shell 50 reliably.

Because with respect to each the first fixed part 81a, 81b, 81c, 81d, 81e, 81f, the 81g that extend along first direction X, with each the second fixed part 82a, 82b of extending along second direction Y, each the 3rd fixed part 83a, the 83b that extends along third direction Z is bending when extending with their vertical substantially directions and prolongs formation, so when having avoided vibration with complexity to be applied on the optical take-up apparatus 1 reliably, the shell 50 with respect to optical take-up apparatus 1 in the plate 20 with PDIC10 produces offsets.

For example, even in optical take-up apparatus 1, produce resonance, plate 20 with PDIC10 also can pass through each bonding agent 91,92,93, utilization be arranged on each first fixed part 81a that offset in the shell 50 prevents the 80A of portion, 80B, 81b, 81c, 81d, 81e, 81f, 81g, along with the vertical substantially second direction Y of first direction X prolong each the second fixed part 82a, 82b of forming with along each the 3rd fixed part 83a, 83b of extending with the vertical substantially third direction Z of first direction X and second direction Y, continue reliably to be fixed in the shell 50.

Described third direction Z is the direction of the shadow surface when laser is mapped to PDIC10.

Like this, avoided the generation of following problems, that is, applied complicated vibration, thereby the shell 50 with respect to optical take-up apparatus 1 produces offset, optical take-up apparatus 1 cisco unity malfunction in the plate 20 with PDIC10 at optical take-up apparatus.Because being arranged on each the 3rd fixed part 83a, 83b that offset in the shell 50 prevents the 80A of portion, 80B shadow surface when laser is mapped to PDIC10 extends, so when having avoided producing resonance in optical take-up apparatus 1, the optical axis direction along PDIC10 in the plate 20 with PDIC10 produces offset.In the time will being applied on the plate 20 with PDIC10 along the power of the optical axis direction of PDIC10, the offset that is extended by the shadow surface along PDIC10 prevents that each the 3rd fixed part 83a, 83b of the 80A of portion, 80B from further suppressing along the power of the optical axis direction of PDIC10.

As shown in Figure 2, the offset that is provided with in the shell 50 prevents that the 80A of portion (80B) also has the second isolation part 85d, 85e, 85f, the 85g that isolates the first fixed part 81d, 81e, 81f, 81g and the 3rd fixed part 83a, 83b.Utilize Fig. 3 to be elaborated, the offset that is arranged in the shell 50 prevents that the 80A of portion (80B) also has the second isolation part 85d, the 85e that isolates the first fixed part 81d, 81e and the 3rd fixed part 83a.

Because the offset that is provided with in the shell 50 of optical take-up apparatus 1 prevents among the 80A of portion, the 80B, have the second isolation part 85d, 85e, 85f, 85g, so prevent that further the shell 50 with respect to optical take-up apparatus 1 produces offset in the plate 20 with PDIC10.Because the offset in being arranged on shell 50 prevents the 80A of portion, the first fixed part 81d of 80B, 81e, 81f, 81g and the 3rd fixed part 83a, between the 83b, have the two fixed part 81d of isolation, 81e, 81f, 81g, 83a, the second isolation part 85d of 83b, 85e, 85f, 85g, so utilizing bonding agent 92, when 93 plates 20 that will have PDIC10 are installed in the shell 50, bonding agent 92,93 between the first fixed part 81a, 81b, 81c, 81d, 81e, 81f, 81g and the 3rd fixed part 83a, the second isolation part 85d between the 83b, 85e, 85f, between the 85g, thereby the plate 20 that will have PDIC10 is adhered in the shell 50 reliably.

By making bonding agent 92,93 between isolating the first fixed part 81d, 81e, 81f, 81g and the 3rd fixed part 83a, the second isolation part 85d of 83b, 85e, 85f, between the 85g, even apply fierce vibration for optical take-up apparatus 1 from all directions, also can utilize skew to prevent the 80A of portion, the first fixed part 81d of 80B, 81e, 81f, 81g, the 3rd fixed part 83a, 83b, with between isolating two fixed part 81d, 81e, 81f, 81g, 83a, the second isolation part 85d of 83b, 85e, 85f, bonding agent 92 between the 85g, 93, further avoid in plate 20, producing offset with PDIC10.Therefore, the optical take-up apparatus 1 of carrying out operating stably can be offered the user of optical take-up apparatus 1 or have the assembler etc. of the optical disc apparatus (not shown) of optical take-up apparatus 1.

The offset that is arranged on shell 50 (Fig. 1) prevents that the fixed part 81,82,83 among the 80A of portion, the 80B has the ditch 81,82,83 (Fig. 1) that the cross section that can put into bonding agent 91,92,93 (Fig. 2, Fig. 3) is rectangle substantially.Utilize Fig. 2 to be elaborated, it is ditch 81a, 81b, 81c, 81d, 81e, 81f, 81g, 82a, 82b, 83a, the 83b of rectangle substantially that fixed part 81a, 81b, 81c, 81d, 81e, 81f, 81g, 82a, 82b, 83a, 83b have the cross section that can put into bonding agent 91,92,93.

And, form the first isolation part 85a, 85b, the 85c that separate the first ditch 81a, 81b, 81c and the second ditch 82a, 82b, as the first next door 85a, 85b, 85c.Formation separates the second isolation part 85d, 85e, 85f, the 85g of the first ditch 81d, 81e, 81f, 81g and the 3rd ditch 83a, 83b, as the second next door 85d, 85e, 85f, 85g.

Like this, prevent the 80A of portion, 80B owing to form the offset of shell 50 concavo-convexly, the plate 20 with PDIC10 is fixed on the shell 50 reliably.Prevent fixed part 81a, 81b, 81c, 81d, 81e, 81f, 81g, 82a, 82b, 83a, ditch 81a, the 81b of 83b, 81c, 81d, 81e, 81f, 81g, 82a, 82b, 83a, 83b on the 80A of portion, the 80B by bonding agent 91,92,93 being put into the offset that is arranged on shell 50, fixedly have the plate 20 of PDIC10 with respect to shell 50 reliably.

Because put into bonding agent 91,92, the 93 performance consolidation effects of ditch 81a, 81b, 81c, 81d, 81e, 81f, 81g, 82a, 82b, 83a, 83b and sclerosis, so bonding agent 91,92,93 is bonded among ditch 81a, 81b, 81c, 81d, 81e, 81f, 81g, 82a, 82b, 83a, the 83b reliably.Consolidation effect is meant that the bonding agent intrusion is positioned at the lip-deep space and the sclerosis of bonded material, exercises the such effect of similar nail and wedge.Consolidation effect is also referred to as cast anchor effect or fastening effect.

Because put into bonding agent 91,92, the 93 performance consolidation effects of ditch 81a, 81b, 81c, 81d, 81e, 81f, 81g, 82a, 82b, 83a, 83b and sclerosis, even, also can avoid on the bonding agent 91,92,93 that solidifies, producing offset so the vibration of fierceness is applied on the shell 50 of optical take-up apparatus 1.

Therefore, the offset that shell 50 is put in utilization prevents the bonding agent 91,92,93 that fixed part 81a, 81b, 81c, 81d, 81e, 81f, 81g, 82a, 82b, 83a, ditch 81a, the 81b of 83b, 81c, 81d, 81e, 81f, 81g, 82a, 82b, 83a, the 83b of the 80A of portion, 80B also solidify, and the plate 20 that will have PDIC10 is fixed on the shell 50 reliably.

Offset prevents that the 80A of portion, 80B are arranged on from relatively outstanding a pair of teat 70A, the 70B that is provided with of shell 50.Is the center from relatively outstanding a pair of teat 70A, the 70B that is provided with of shell 50 with the part at PDIC10 place, forms substantially symmetrically.

Thereby the plate 20 that will have PDIC10 is installed in the shell 50 reliably.When the plate 20 that will have PDIC10 is fixed in the shell 50, prevent on the 80A of portion, the 80B that by bonding agent 91,92,93 being coated in the plate 20 that will have PDIC10 is fixed on the shell 50 reliably from the offset of shell 50 outstanding a pair of teat 70A, the 70B that are provided with.

And because teat 70A, 70B be provided with from shell 50 is outstanding, the coating operation that the plate 20 that is used for having PDIC10 is installed in the bonding agent 91,92,93 on the shell 50 becomes and carries out easily.Owing to have teat 70A, 70B outstanding setting the on shell 50 that is used to allow the offset of bonding agent 91,92,93 coatings prevent the 80A of portion, 80B, the plate 20 of avoiding having PDIC10 is easy with respect to the generation transfiguration of the offset of shell 50.

PDIC10 is installed in and makes PDIC10 with respect on the definite plate 20 that carries out easily in the position of shell 50. Prevent applying adhesive 91,92,93 on the 80A of portion, the 80B at the plate 20 that PDIC10 is installed and the offset of shell 50.

Therefore, the plate 20 that will have a PDIC10 accurately is installed on the shell 50.Utilize bonding agent 91,92,93, when the plate 20 that will have a PDIC10 is installed on the shell 50,, determine that with respect to the position of shell 50 processing ease carries out when then PDIC10 being installed if PDIC10 is installed on the plate 20.

When PDIC10 being installed on the shell 50, for example by continuing to carry out the light path adjustment, carry out the installation site adjustment of plate 20 simultaneously with PDIC10 with respect to shell 50, determine after the installation site of plate 20, the offset that bonding agent 91,92,93 is coated in shell 50 prevents on the 80A of portion, 80B and the plate 20, thereby the plate 20 that accurately will have PDIC10 is installed on the shell 50.

As described bonding agent 91,92,93, adopt the UV cured type bonding agent 91,92,93 that hardens by irradiation ultraviolet radiation.

Like this, the plate 20 with PDIC10 is fixed on rapidly and accurately on the shell 50.UV cured type bonding agent the 91,92, the 93rd, the only bonding agent that just can harden by irradiation ultraviolet radiation.When the plate 20 that will have PDIC10 was installed on the shell 50, if adopt UV cured type bonding agent 91,92,93, then the curing of bonding agent 91,92,93 can be carried out rapidly.Therefore, in the process of bonding agent 91,92,93 sclerosis, the plate of having avoided having PDIC10 20 produces offset with respect to shell 50, the plate 20 with PDIC10 correctly can be installed on the shell 50.

Adopt epoxy resin bonding agent 91,92,93, as described bonding agent 91,92,93.

Therefore, the plate 20 with PDIC10 accurately can be fixed on the shell 50.Epoxy resin bonding agent 91,92,93 has good low contraction and thermotolerance etc.Because epoxy resin bonding agent the 91,92, the 93rd, the low material that shrinks is so can install the plate 20 with PDIC10 accurately with respect to shell 50.

And, because the good heat resistance of epoxy resin bonding agent 91,92,93, so when the shell 50 of for example optical take-up apparatus 1 became high temperature, influence and the extreme of having avoided bonding agent 91,92,93 to be subjected to heat went bad.Even when optical take-up apparatus 1 becomes high temperature, the plate 20 with PDIC10 also utilizes epoxy resin bonding agent 91,92,93 to continue accurately and reliably to be installed on the shell 50.Epoxy resin bonding agent 91,92,93 becomes harder material after sclerosis.

As a kind of UV cured type bonding agent of photo-hardening type bonding agent, enumerate for example U.S. EMI corporate system: the UV cured type bonding agent of trade name " OPTOCAST " series.As concrete UV cured type bonding agent, enumerate U.S. EMI corporate system: OPrOCAST3400, OPTOCAST3415 etc.UV cured type bonding agent such as OPTOCAST3400, OPTOCAST3415 is the UV cured type bonding agent of a fluidity of epoxy resin.The material that the UV cured type bonding agent of epoxy resin is low-shrinkage and high-fire resistance, resistance to chemical reagents and moisture-proof are good.By adopting the UV cured type bonding agent of a fluidity, the liquid that carries out when need not to use the UV cured type bonding agent of two fluidities and the married operation of liquid.Therefore, can carry out the working procedure of coating of bonding agent rapidly and effectively.

And, as a kind of UV cured type bonding agent of photo-hardening type bonding agent, enumerate for example U.S. NORLAND corporate system: optics UV bonding agent NOA60, NOA83H etc.UV cured type bonding agents such as optics UV bonding agent NOA60, NOA83H are the UV cured type bonding agent of acrylic acid series one fluidity.The firm time of the UV cured type bonding agent of acrylic acid series is short, can harden in the unit at several seconds.The meaning of UV is " ultraviolet ".The meaning of " ultraviolet radiation " is ultraviolet ray.UV cured type bonding agent is called UV constrictive type bonding agent etc.Can be according to the design specification of optical take-up apparatus 1 etc., for example utilize the UV cured type bonding agent of two fluidities to carry out bonding process.As the UV cured type bonding agent of two fluidities, for example enumerating, two one-pack-type epoxy resins are UV cured type bonding agent etc.

Operation when PDIC10 being installed on the shell 50 describes.At first, carry out the light path position adjustment of PDIC10.The light path (not shown) that forms in the opposite shell 50, X-axis, the Y-axis of PDIC10 and the Z axle of PDIC10 of adjustment PDIC10.After the installation site adjustment of PDIC10 being carried out with respect to shell 50, offset at plate 20 that PDIC10 has been installed and shell 50 prevents between the 80A of portion, the 80B, applies the fixedly UV cured type bonding agent 91,92,93 of epoxy resin of usefulness in the mode of building bridge.Afterwards, with the UV cured type bonding agent 91,92,93 of ultraviolet ray irradiation epoxy resin, make UV cured type bonding agent 91,92,93 sclerosis of epoxy resin.Like this, the plate 20 with PDIC10 is fixed on the shell 50.

Optical take-up apparatus 1 is the optical take-up apparatus of the small light and thin on the computer cd device (figure does not show) that can be installed in easy carrying.

If will carry out the optical take-up apparatus 1 of the small light and thin of basicly stable action is installed on the optical disc apparatus, then can avoid the generation of following problems, that is, the computing machine of carrying produces job failure with the optical take-up apparatus 1 of optical disc apparatus easily, and the result is the computing machine malfunction of carrying easily.As the computing machine of easy carrying, can enumerate for example portable computer (not shown), notebook computer (not shown) etc.

Computing machine is described.PC (Personal Computer) is called for short PC.And PC also abbreviates " パ ソ コ Application " etc. as.

Desktop computer is a desktop computer, is the computing machine that can use on the table.But desktop computer can not easily be moved.

With respect to desktop computer,, be structure with the optical disc apparatus that makes the slender type drive unit because portable computer and notebook computer require lightweight and lightening.The structure of portable computer and notebook computer is different with desktop computer.Portable computer or notebook computer are display (not shown) and the incorporate structure of PC body (not shown).By amounting to display with respect to the PC body, portable computer or notebook computer become slim size computer.Notebook computer is the universal PC of cardinal principle A4 paper size or smaller szie when amounting to and overlook observation substantially.So notebook computer is also referred to as book-type PC.Like this, portable computer or notebook computer are made to the computer of the compactness that can easily move.

The computing machine that portable computer or notebook computer etc. are moved easily exists miniaturization, lightening, light-weighted tendency, thereby optical take-up apparatus 1 also exists miniaturization, lightening, light-weighted tendency.

For example, when moving the computing machine of moving easily, even apply fierce vibration on computers, also can avoid the generation of following problems, that is, PDIC10 produces offset, optical take-up apparatus 1 malfunction with respect to the shell 50 of optical take-up apparatus 1.Utilize the offset of shell 50 to prevent the last bonding bonding agent 91,92,93 of the 80A of portion, 80B, PDIC10 is continued to be fixed on the shell 50.

Therefore, even can be applied in the execution operating stably that also can in plate 20, not produce offset under the such sternness use/environment of fierce vibration with PDIC10, small light and thin optical take-up apparatus 1, offer the user of optical take-up apparatus 1 or have the assembler etc. of the optical disc apparatus (not shown) of optical take-up apparatus 1.

In the data read special-purpose cd device that described optical take-up apparatus 1 can be installed to for example " CD-ROM ", " DVD-ROM " etc. are corresponding.And, described optical disc apparatus for example can be installed to the tilt adjustments circuit and read special-purpose CD with " CD-ROM ", " DVID-ROM " etc., or " CD-R ", " DVD-R ", " DVD+R " etc. can write CD, and with " CD-RW ", " DVD-RW ", " DVD+RW ", " DVD-RAM ", " HD-DVD ", " Blu-ray Disc " etc. can write/erase and the corresponding optical disc apparatus of the CD of rewriting in.

And the optical disc apparatus with described optical take-up apparatus 1 for example can be installed in sound equipment/vision facilitiess such as stereo sets such as computing machines such as notebook computer, portable computer, desktop computer, CD Player, DVD player etc.And, should when described optical disc apparatus can be with multiple media such as CD series CD, DVD series CD.The present invention is not limited to illustrated structure.Described explanation is used to make understanding of the present invention to become easily, does not limit the invention.Can under the situation that does not break away from its aim, change, improve, be equal to replacement and be also contained among the present invention the present invention.

Claims (12)

1. optical take-up apparatus has:

Reception from the photodetector of the light of media reflection and

The shell of this photodetector is installed, is it is characterized in that

Utilization is installed in bonding agent in this shell with this photodetector, this photodetector is fixed in this shell,

In this shell, offset is set and prevents portion, prevent the offset of described photodetector or described bonding agent with respect to this shell,

This offset portion of preventing has the fixed part that extends along a plurality of directions,

Prevent in the portion by described bonding agent is coated in offset, this photodetector is installed in this shell.

2. the optical take-up apparatus of claim 1 record is characterized in that, the described offset portion of preventing has: first fixed part that extends along first direction and second fixed part that extends along the second direction that is different from first direction,

Described first direction is the optical axis direction that is mapped to the described light of described photodetector, and described second direction is the direction of the shadow surface when described light is mapped to this photodetector.

3. the optical take-up apparatus of claim 2 record is characterized in that, with respect to described first fixed part that extends along described first direction, described second fixed part that extends along described second direction prolongs formation along the direction vertical with described first fixed part.

4. the optical take-up apparatus of claim 2 record is characterized in that, the described offset portion of preventing also has the isolation part that separates described first fixed part and second fixed part.

5. the optical take-up apparatus of claim 2 record is characterized in that, the described offset portion of preventing also has the 3rd fixed part, and the 3rd fixed part extends along the third direction that is different from described first direction and is different from described second direction.

6. the optical take-up apparatus of claim 5 record, it is characterized in that, with respect to described first fixed part that extends along described first direction, with described second fixed part that extends along described second direction, described the 3rd fixed part that extends along described third direction forms along prolonging with described first fixed part direction vertical with described second fixed part.

7. the optical take-up apparatus of claim 5 record is characterized in that, described third direction is the direction of the shadow surface when described light is mapped to described photodetector.

8. the optical take-up apparatus of claim 5 record is characterized in that, the described offset portion of preventing also has the isolation part that separates described first fixed part and described the 3rd fixed part.

9. the optical take-up apparatus of claim 1 record is characterized in that described fixed part has the ditch that can put into described bonding agent.

10. the optical take-up apparatus of claim 1 record is characterized in that, utilizes the UV cured type bonding agent that hardens by the ultraviolet ray irradiation, as described bonding agent.

11. the optical take-up apparatus of claim 1 record is characterized in that, adopts the epoxy resin bonding agent as described bonding agent.

12. the optical take-up apparatus of claim 1 record is characterized in that, can be installed in the optical disc apparatus of the computing machine that can move.

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