CN1467716A - Optical magnetic head - Google Patents
Optical magnetic head Download PDFInfo
- Publication number
- CN1467716A CN1467716A CNA031384773A CN03138477A CN1467716A CN 1467716 A CN1467716 A CN 1467716A CN A031384773 A CNA031384773 A CN A031384773A CN 03138477 A CN03138477 A CN 03138477A CN 1467716 A CN1467716 A CN 1467716A
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- CN
- China
- Prior art keywords
- board
- flexible base
- framework
- photo detector
- reinforcement plate
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 230000003287 optical effect Effects 0.000 title claims abstract description 13
- 239000003990 capacitor Substances 0.000 claims abstract description 30
- 230000002787 reinforcement Effects 0.000 claims description 56
- 230000004907 flux Effects 0.000 claims description 16
- 229910000679 solder Inorganic materials 0.000 claims description 16
- 238000003466 welding Methods 0.000 claims description 12
- 230000002093 peripheral effect Effects 0.000 claims description 2
- 230000003014 reinforcing effect Effects 0.000 abstract 3
- 239000000758 substrate Substances 0.000 description 16
- 238000010586 diagram Methods 0.000 description 8
- 239000007767 bonding agent Substances 0.000 description 4
- 230000001172 regenerating effect Effects 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 230000015556 catabolic process Effects 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
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- Optical Head (AREA)
Abstract
An optical head device, a PD-IC(8) and a capacitor (9) are mounted on the same surface of the flexible board (4), the flexible board (4) is bent to the back side, and a reinforcing plate 6 is held between the bent parts. A frame (7) is arranged at the surface side of a region in which the PD-IC(8) is mounted on the flexible board (4), the frame (7) and the reinforcing plate (6) are soldered at a part of a through hole of the reinforcing plate (6) and flexible board assembly is constituted, and the back side of the frame (7) is stuck and fixed to a frame (3). In this way, an optical head device in which one-side flexible board can be used by adopting a new structure when a light receiving element is mounted on a frame is provided.
Description
Technical field
The present invention relates to by flexible base, board the light magnetic head apparatus of photo detector lift-launch on framework.
Background technology
Light magnetic head apparatus at the record regenerating that is used for CD (Mini Disc) and DVD optical recording medias such as (digital multifunctional discs), the light that penetrates from lasing light emitters such as laser diodes will be gathered in optical recording media by the light that object lens are collected by the light-conducting system object lens that lead.At this moment, be equipped with the objective lens device etc. that lasing light emitter, object lens and tracking direction and focus direction drive object lens on the framework, and, also be equipped with photo detector on this framework and remove capacitor that noise uses etc. with the state that is installed in flexible base, board.
In the light magnetic head apparatus of this structure, photo detector acceptance is reflective from optical recording media, the rub-out signal that is recorded in optical recording media is detected, detect trail-and-error signal and focus error signal simultaneously, lens driver carries out the driving of tracking direction and focus direction to object lens according to these rub-out signals.In order photo detector to be carried out high-speed driving to improve response, be on the face of the side by photo detector being assembled in the double-faced flexible substrate in the past, be assembled on the opposing party's the face and will remove the capacitor that noise uses, to shorten the wiring distance between these parts.
Yet, exist the problem that the double-faced flexible substrate is 2 times of prices of single-sided flexible substrate approximately, therefore, the light magnetic head apparatus that the double-faced flexible substrate is replaced into the cost degradation of single-sided flexible substrate is developed in strong hope, but photo detector is subjected to being equipped on the restriction on the layouts such as framework side usually, if just with photo detector and remove capacitor that power supply noise uses near and be assembled in the same one side of flexible base, board, then wanting to be configured to these assembling zones is impossible along the side of framework.
In view of the above-mentioned problems, the objective of the invention is to, provide a kind of and when photo detector is equipped on framework, adopt new structure to make the use of single-sided flexible substrate become possible light magnetic head apparatus.
Summary of the invention
For achieving the above object, light magnetic head apparatus of the present invention has flexible base, board and framework, described flexible base, board is assembled with the reflective photo detector of acceptance from optical recording media, and be assembled with electronic component on the next door of this photo detector, described framework carries this flexible base, board, it is characterized in that, described photo detector and described electronic component are assembled into the face side of described flexible base, board and the face side in the side of the inside, and the state that forms to the inside side warpage between the assembling zone of described flexible base, board with and described electronic component regional in the assembling of described photo detector carries on described framework.
In the present invention, described electronic component for example is to remove the capacitor that noise is used.
In the present invention, as flexible base, board because of having used single-sided flexible substrate cheaply, so can reduce the cost of light magnetic head apparatus.Again, photo detector and electronic component are assembled on the same one side of flexible base, board, between the assembling zone of the assembling of photo detector zone and electronic component with flexible base, board to the lift-launch of side bended ground, the inside on framework.Like this, under state, reduced the shared area in assembling zone and electronic component assembling zone of photo detector, therefore, can not cause obstacle when regional along the assembling of the side configuration photo detector of framework and electronic component with the flexible base, board warpage.Adopt this structure, even use the single-sided flexible substrate, the terminal that also can make photo detector to the wiring distance between the terminal of capacitor (electronic component) less than for example 1cm, the noise that capacitor can effectively photo detector take place be removed.
In the present invention, described flexible base, board preferably clamps the reinforcement plate of rigidity between the inside side that the inside side and the described electronic component in described photo detector assembling zone are assembled the zone, and, this reinforcement plate is carried on described framework under the state of the inside side that is fixed in described photo detector assembling zone at least.Adopt this structure,, also can keep the shape in photo detector assembling zone etc., can eliminate the bad phenomenon that causes because of warpage even with the flexible base, board warpage.
In the present invention, preferably on described flexible base, board, form the welding opening that can local expose described reinforcement plate, be formed with the clamping flange that available solder flux is fixed in this flexible base, board described reinforcement plate on every side with opening in this welding.Adopt this structure, with bonding agent etc. with flexible base, board and reinforcement plate temporary fixed after, can use solder flux that flexible base, board and reinforcement plate is fixing reliably.
In the present invention, preferably on described flexible base, board, the face side configuration in described photo detector assembling zone has the framework of the window that the light accepting part that makes this photo detector exposes, on this framework, the face side that is positioned at described flexible base, board side is fixed with described reinforcement plate, and the inside side of described framework is fixed in described framework side.Adopt this structure, the flexible base, board that is assembled with photo detector is fixed in framework by reinforcement plate, can carry on framework reliably by reinforcement plate and framework.Like this, even also can not be partial to, can improve the reliability of light magnetic head apparatus because of temperature variation etc. has caused environmental change, the optical axis of photo detector.
In the present invention, described reinforcement plate preferably is fixed on the described framework with solder flux in the throughhole portions that this reinforcement plate peripheral end face is formed with semi-circular cut-out.Adopt this structure, can reinforcement plate and framework is fixing reliably, and, use solder flux expeditiously reinforcement plate and framework to be fixed.
In the present invention, preferably on described flexible base, board, the part overlapping with described through hole forms otch, along the edge of this otch, is formed with flange in the face side of this flexible base, board.Adopt this structure, the part of through hole with solder flux with reinforcement plate and framework temporary fixed after, also flexible base, board is fixed in this part with solder flux.Thus, use solder flux that flexible base, board, reinforcement plate and framework are fixedly secured.
In sum, in the present invention, as flexible base, board because of having used single-sided flexible substrate cheaply, so can reduce the cost of light magnetic head apparatus.Again, photo detector and electronic component are assembled on the same one side of flexible base, board, between the assembling zone of the assembling of photo detector zone and electronic component with flexible base, board to the lift-launch of side bended ground, the inside on framework.Like this, under state,, therefore, can not cause obstacle when regional along the assembling of the side configuration photo detector of framework and electronic component because the shared area in the assembling of photo detector zone and electronic component assembling zone is narrow and small with the flexible base, board warpage.Adopt this structure, even use the single-sided flexible substrate, the terminal that also can make photo detector to the wiring distance between the terminal of capacitor (electronic component) less than for example 1cm, the noise that capacitor can effectively photo detector take place be removed.
The simple declaration of accompanying drawing
Fig. 1 is the stereographic map of light magnetic head apparatus of the record regenerating of CD, CD-R or DVD.
Fig. 2 is the stretch-out view of the flexible base, board that uses in this routine light magnetic head apparatus.
Fig. 3 is illustrated in the key diagram of the warpage part of flexible base, board shown in Figure 2 with the temporary fixed state of reinforcement plate.
Fig. 4 is the key diagram that is illustrated in assembling PD-IC state on the flexible base, board shown in Figure 3.
Fig. 5 is the key diagram of the casing structure of the fixing reinforcement plate shown in Figure 4 of expression.
Fig. 6 is fixed in reinforcement plate shown in Figure 4 for expression the key diagram of framework state.
Embodiment
Explanation is suitable for light magnetic head apparatus of the present invention with reference to the accompanying drawings.
(integral body of light magnetic head apparatus constitutes)
Fig. 1 is the stereographic map of light magnetic head apparatus of the record regenerating of CD, CD-R or DVD.
As shown in Figure 1, this routine light magnetic head apparatus 1 has resin system or metal framework 3.Be parallel to each other 2 axles (not shown) break-through that shape installs in linking part 31,21,33 with respect to machine, and this framework 3 can move along axle.
On framework 3, be equipped with laser diode etc. lasing light emitter, inflection grid, optical splitter, sight the optical element (not shown) of lens, reflecting plate etc., also be equipped with the objective lens device 5 that focus direction and tracking direction drive object lens 2 simultaneously.As this objective lens device 5, this example has been used axle sliding pendulum ejector half drive unit.
On light magnetic head apparatus 1, framework 3 is equipped with the flexible base, board 4 (hatched example areas of Fig. 1) of the driving usefulness of the driving of lasing light emitter and objective lens device 5.On this flexible base, board 4, face side is assembled with connector 10, draw back the PD-IC that part is equipped with photo detector that photodiode (PD) waits and driving loop thereof etc. in assembling in the side surface part 30 of framework 3, also be assembled with simultaneously this PD-IC is removed the capacitor that noise is used, this part will be made an explanation below with reference to Fig. 2 to Fig. 6.
(loading structure of photo detector)
With reference to Fig. 2 to Fig. 6 the PD-IC structure of lift-launch on this routine light magnetic head apparatus 1 is described.
Fig. 2 is the stretch-out view of the flexible base, board that uses in this routine light magnetic head apparatus.Fig. 3 is the key diagram that is illustrated in the warpage part of the flexible base, board shown in Figure 2 state that reinforcement plate is temporary fixed, Fig. 4 is the key diagram that is illustrated in assembling PD-IC state on the flexible base, board shown in Figure 3, Fig. 5 is the key diagram of the casing structure of the fixing reinforcement plate shown in Figure 4 of expression, and Fig. 6 is fixed in reinforcement plate shown in Figure 4 for expression the key diagram of framework state.
Among Fig. 1, the flexible base, board 4 of this routine light magnetic head apparatus 1 usefulness is the single-sided flexible substrate, this single-sided flexible substrate has only this face side to be formed with flange and wiring graph, in the zone that the side surface part 30 of framework 3 is drawn back, as shown in Figure 2, utilize the cutting-out part 40 of groove shape to form PD-IC assembling zone 44, this PD-IC assembling zone 44 is connected with body part 41 by linking part 42.Again, the foundation in PD-IC assembling zone 44 has partly formed capacitor assembling zone 45, is formed with to utilize this part easily with the opening 49 of flexible base, board 4 warpages between capacitor assembling zone 45 and PD-IC assembling regional 44.
In PD-IC assembling zone 44, be formed with a plurality of flanges 440 that 2 row are connected with wiring graph, be formed with respectively at these 4 corner parts simultaneously and weld with opening 46.The part of a plurality of flanges 440 forms along the edge of welding with opening 46.And, on 3 limits in PD-IC assembling zone 44, formed semicircular otch 47 respectively, around this otch 47, also be formed with flange 48 simultaneously.
To this, in capacitor assembling zone 45, be formed with 4 a plurality of flanges 450 that are connected with wiring graph.
The wiring distance that the flange of using from flange 440 to the capacitor of PD-IC assembling usefulness is 450 is less than 1cm.
In addition, assemble the part 43 that regional 45 both sides extend at capacitor, its end also is formed with the flange 430 of welding usefulness.
Adopt the flexible base, board 4 of this structure, when PD-ID is equipped on framework 3, in this example, as shown in Figure 3, to the inside side warpage, reinforcement plate 6 that then will for example 5mm is thick inserts by (the inside side in PD-IC assembling zone 44 and capacitor are assembled between regional 45 the inside side) between the part of warpage with flexible base, board 4 in the position that at first promptly is formed with opening 49 (with reference to Fig. 2) between PD-IC assembling zone 44 and capacitor assembling zone 45.At this moment, with double-sided belt and bonding agent that PD-IC assembling zone 44 is temporary fixed with reinforcement plate 6.
As shown in Figure 4, flexible base, board 4 for the reinforcement plate 6 of temporary fixed above structure, welding at flexible base, board 4 is welded with opening 46 places, to weld with the flange 440 at opening 46 edges and the flange 61 of reinforcement plate 6 along the welding of flexible base, board 4, after flexible base, board 4 and reinforcement plate 6 are fixed, PD-IC8 is assembled on the flange 440 of PD-IC assembling usefulness with solder flux.What the assembling of the PD-IC8 of this moment was adopted is the soft heat mode.
Secondly, on flexible base, board 4, framework shown in Figure 57 is installed in the regional face side of PD-IC8 assembling, finishes flexible base, board assembly 400 shown in Figure 6.Wherein, framework 7 for example is a wiring substrate made of iron, is formed with the window 70 of the light accepting part 80 (being formed with the side of photo detector) that can expose PD-IC8.As shown in Figure 6, the state that is overlapped in the face side in PD-IC8 assembling zone with framework 7 on flexible base, board 4 forms the state that the light accepting part 80 of PD-IC8 exposes from this window 70.
The state that is overlapped in the face side in PD-IC8 assembling zone with framework 7 on flexible base, board 4 is formed with flange 71 respectively at the otch 47 of the face side of framework 7 and flexible base, board 4 and the through hole 60 overlapping parts of reinforcement plate 6.In case weld in the part that is formed with through hole 60, then the flange 71 of solder flux flange 48 that otch 47 peripheries of the through hole 60 of reinforcement plate 6, flexible base, board 4 are formed and framework 7 is fixing.The result has formed the flexible base, board assembly that flexible base, board 4, reinforcement plate 6 and framework 7 are fixedly secured, if with bonding agent the inside side of framework 7 is fixed in the side surface part 30 of framework 3, then becomes PD-IC8 and carries state on framework 3.
In capacitor assembling zone 45, after its inside side is sticked another piece reinforcement plate (not shown) enhancing, capacitor 9 is assembled on the flange 450 of the capacitor assembling usefulness that is formed at flexible base, board 4 face side, perhaps after on the flange 450 that capacitor 9 is assembled in the capacitor assembling usefulness that is formed at flexible base, board 4 face side, the inside side that another piece reinforcement plate (not shown) is attached to capacitor assembling zone 45 strengthens.These operations also can be before flexible base, board 4 warpages or behind the warpage, and carry out in each operation before or after reinforcement plate 6 is installed.At this moment, the capacitor on flexible base, board 4 is assembled the part 43 that regional 45 both sides extend, and flange 430 is welded on the face side of framework 7.
(effect of present embodiment)
In the light magnetic head apparatus 1 of present embodiment, as flexible base, board 4 because of having used single-sided flexible substrate cheaply, so can reduce cost.
Again, PD-IC8 and capacitor 9 are assembled in the same one side (face side) of flexible base, board, between PD-IC assembling zone 44 and capacitor assembling zone 45 with flexible base, board 4 to the lift-launch of side bended ground, the inside on framework 3.Like this, PD-IC assembles zone 44 and capacitor is assembled regional 45 shared areas owing to the state with flexible base, board 4 warpages has reduced, and therefore can be configured in the side surface part 30 of framework 3 along flexible base, board 4.Adopt this structure, even use single-sided flexible substrate 4, the terminal that also can make PD-IC8 to the wiring distance between the terminal of capacitor 9 less than for example 1cm, the noise that capacitor 9 can effectively PD-IC8 take place be removed.
In the present embodiment, owing to partly clamp reinforcement plate 6 and fixed, therefore,, can eliminate the bad phenomenon that causes because of warpage even, also can keep its shape etc. with flexible base, board 4 warpages at the warpage of flexible base, board 4.
And the welding that forms the flange that can expose reinforcement plate 6 on flexible base, board 4 is formed with the clamping flange 440 that available solder flux is fixed in this flexible base, board 4 reinforcement plate 6 with opening 46 around welding with opening 46.Therefore, with double-sided belt and bonding agent etc. with flexible base, board 4 and reinforcement plate 6 temporary fixed after, as long as weld with opening 46, flexible base, board 4 and reinforcement plate 6 can be fixed reliably from welding.
Again, at the state that is fixed in reinforcement plate 6 with the framework 7 of the face side that will be overlapped in PD-IC8 assembling zone with solder flux on the flexible base, board 4 flexible base, board 4 is carried on framework 3, therefore, flexible base, board 4 is fixed on the framework 7 by reinforcement plate 6, and carries reliably on framework 3 by reinforcement plate 6 and framework 7.Like this, even also can not be partial to, can improve the reliability of light magnetic head apparatus 1 because of temperature variation etc. causes environmental change, the optical axis of the light accepting part 80 of PD-IC8.
Again, owing to weld in the part of the through hole 60 of reinforcement plate 6, therefore can reinforcement plate 6 and framework 7 is fixing reliably, can be effectively that reinforcement plate 6 is fixing with framework 7.And, on described flexible base, board 4, form otch 47 with the overlapping part of 60 through holes, be formed with flange 48 along the edge of this otch 47, therefore, with solder flux reinforcement plate 6, is also fixed flexible base, board 4 with solder flux fixedly the time with framework 7 in the part of through hole 60.Thus, use solder flux flexible base, board 4, reinforcement plate 6 and framework 7 can be fixedly secured.
Claims (8)
1. a light magnetic head apparatus has flexible base, board and framework, and described flexible base, board is assembled with the reflective photo detector of acceptance from optical recording media, and is assembled with electronic component on the next door of this photo detector, and described framework carries this flexible base, board, it is characterized in that,
Described photo detector and described electronic component all are to be assembled into the face side of described flexible base, board and the face side in the side of the inside,
The state that forms to the inside side warpage between the assembling zone of described flexible base, board with and described electronic component regional in the assembling of described photo detector carries on described framework.
2. light magnetic head apparatus as claimed in claim 1 is characterized in that, the wiring distance of the terminal of the described photo detector on the described flexible base, board between the described terminals of electronic components is less than 1cm.
3. light magnetic head apparatus as claimed in claim 1 or 2 is characterized in that, described electronic component is to remove the capacitor that noise is used.
4. as each described light magnetic head apparatus of claim 1 to 3, it is characterized in that, described flexible base, board is the reinforcement plate that clamps rigidity between the inside side in the inside side in described photo detector assembling zone and described electronic component assembling zone, and this reinforcement plate is carried on described framework under the state of the inside side that is fixed in described photo detector assembling zone at least.
5. light magnetic head apparatus as claimed in claim 4, it is characterized in that, but on described flexible base, board, form the welding opening that locality is exposed described reinforcement plate, be formed with the clamping flange that available solder flux is fixed in this flexible base, board described reinforcement plate on every side with opening in this welding.
6. light magnetic head apparatus as claimed in claim 1 is characterized in that, on described flexible base, board, the face side configuration in described photo detector assembling zone has the framework of the window that the light accepting part that makes this photo detector exposes,
Face side with respect to described flexible base, board side on this framework is fixed with described reinforcement plate, and the inside side of described framework is fixed in described framework side.
7. light magnetic head apparatus as claimed in claim 6 is characterized in that, described reinforcement plate is fixed on the described framework with solder flux in the throughhole portions that this reinforcement plate peripheral end face is formed with semi-circular cut-out.
8. light magnetic head apparatus as claimed in claim 7 is characterized in that, forms otch with the overlapping part of described through hole on described flexible base, board, along the edge of this otch, is formed with flange in the face side of this flexible base, board.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2002159673 | 2002-05-31 | ||
| JP2002159673A JP2004005828A (en) | 2002-05-31 | 2002-05-31 | Optical head device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1467716A true CN1467716A (en) | 2004-01-14 |
| CN1219291C CN1219291C (en) | 2005-09-14 |
Family
ID=29996375
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 03138477 Expired - Fee Related CN1219291C (en) | 2002-05-31 | 2003-05-29 | Optical magnetic head |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP2004005828A (en) |
| CN (1) | CN1219291C (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6809064B2 (en) * | 2016-09-12 | 2021-01-06 | セイコーエプソン株式会社 | Optical sensor module, biometric information detector and electronic device |
-
2002
- 2002-05-31 JP JP2002159673A patent/JP2004005828A/en not_active Ceased
-
2003
- 2003-05-29 CN CN 03138477 patent/CN1219291C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JP2004005828A (en) | 2004-01-08 |
| CN1219291C (en) | 2005-09-14 |
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