CN1219290C - Assembling method for objective lens driving device - Google Patents
Assembling method for objective lens driving device Download PDFInfo
- Publication number
- CN1219290C CN1219290C CN 03137165 CN03137165A CN1219290C CN 1219290 C CN1219290 C CN 1219290C CN 03137165 CN03137165 CN 03137165 CN 03137165 A CN03137165 A CN 03137165A CN 1219290 C CN1219290 C CN 1219290C
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- China
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- lens
- mentioned
- framework
- align member
- lens mount
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- Optical Recording Or Reproduction (AREA)
Abstract
Positioning members 7 and 8 having projections 7a and 8a inserted into an optical path hole 4 of the lens holder 2 are integrally formed in a frame 1, and the projections 7a and 8a are inserted into the optical path hole of the lens holder 2. Thus, the lens holder 2 is positioned with respect to the frame 1. A suspension member supporting the lens holder 2 so that it can be displaced with respect to the frame 1 in such a state is installed. Then, the positioning members 7 and 8 are removed. The suspension member is installed without using the assembly tool by improving installed position precision of the lens holder 2 with respect to the frame 1. Regulation of the lens holder 2 by the positioning members 7 and 8 is canceled in such a state.
Description
Technical field
The present invention relates to be located at disk signal recording mediums such as (disk) is carried out objective lens device on the shaven head that signal reads or signal writes (head).
Background is held art
Objective lens device is generally the lens mount of loading onto object lens by suspension element and is connected with framework, but thereby elasticity support lens mount with respect to the structure of framework displacement.
As suspension element, use messenger wire more.Messenger wire 4 of the configurations that generally are parallel to each other, an end of messenger wire is fixed on the installing plate that is contained on the framework, and the other end is fixed on the lens mount and sets up.Therefore, can support lens mount with respect to the framework displacement by each messenger wire elasticity.
; when in assembling objective lens device process, setting up messenger wire; each messenger wire is inserted into earlier on the installing plate in formed each hole, and then inserts in each hole that is arranged on the lens mount, is fixed on installing plate and the lens mount with scolding tin and cement at last.
And each drive coil of focusing coil and tracking (tracking) coil is installed on the lens mount and constitutes gearing.And can form the permanent magnet and the magnetic force deflection coil of the formation magnetic loop of setting magnetic field to the effective edge of each drive coil of lens mount, be disposed on the framework.
For above-mentioned reasons, when setting up fixedly suspension element, lens mount must be arranged at framework really on the allocation.
And, lens mount is arranged at framework really during allocation, adopt special-purpose assembling tool and carry out.
Therefore, except that the installation site precision that has lens mount is subjected to the problem of influence that assembling tool is provided with position deviation, also there is problem, but also must the framework of assembling tool and the shape of lens mount can be set consideration owing to the operation aspect that must have assembling tool to produce.
And, under the situation that can not guarantee lens mount installation site precision, each suspension element one end of lens mount side and framework side and the supporting location of the other end are produced deviation, the position of fixing each suspension element produces deviation, therefore, during because of tracking and focusing displacement, the posture of object lens changes, and the problem of causing optical performance degradation is arranged at object lens.
Summary of the invention
The assembly method of objective lens device of the present invention will have the align member and the integrally formed operation of above-mentioned framework of projection, and described projection is used for inserting the light path that is arranged on the said lens frame in order to ensure the object lens light path and uses the hole; Above-mentioned projection is inserted light path with in the hole, carry out lens mount and locate with respect to framework; Under the state that the said lens frame is positioned, suspension element is erected on said lens frame and the above-mentioned framework; Lens mount is being supported under the state of above-mentioned framework by suspension element, with the projection of above-mentioned align member from the light path of said lens frame with the operation of removing the hole.Therefore,, just suspension element can be set up on framework and the lens mount, can set up under the situation of suspension element, remove the restriction of align member lens mount without assembling tool by improving the positional precision that is provided with of lens mount with respect to framework.
Description of drawings
Fig. 1 is that relevant objective lens device major part deployed condition of the present invention is faced upward oblique view;
Fig. 2 is that the assembled state of objective lens device shown in Fig. 1 is faced upward oblique view;
Fig. 3 is the assembled state of objective lens device shown in Fig. 1 oblique view of bowing;
Fig. 4 is objective lens device shown in Fig. 1 assembling back state oblique view of bowing that finishes.
Fig. 5 is the sectional view that lens mount 2 is arranged on the state on the framework 1.
Embodiment
Fig. 1 is that relevant objective lens device major part deployed condition of the present invention is faced upward oblique view; Fig. 2 is that the assembled state of objective lens device shown in Fig. 1 is faced upward oblique view; Fig. 3 is the assembled state of objective lens device shown in Fig. 1 oblique view of bowing; Fig. 4 is objective lens device shown in Fig. 1 assembling back state oblique view of bowing that finishes.
High strength synthetic resin such as framework 1 usefulness PPS (polyphenyl thiamines) and polycarbonate are one-body molded, are set in the optics shell (not having diagram) of packed into semiconductor laser and photodetector, constitute shaven head with them.
On the position that object lens 3 are installed on the lens mount 2, form the light path of guaranteeing object lens 3 light paths and use hole 4.And the tracking coil 6 that configuration can surround the focusing coil 5 of the coiling around lens mount 2 sides and reel in the both sides of two effective edges of lens mount 2 respectively on lens mount 2.
Clamping lens mount 2 and relative, the outstanding to the inside respectively align member 7,8 that is provided with is integrally formed on the framework 1 from framework 1 two side.Form the light path that to insert lens mount 2 respectively with projection 7a, 8a in the hole 4 at the front end of each align member 7,8.
On above-mentioned align member 7,8, be provided with respectively and join with lens mount 2, and to lip portions 7b, the 8b of its support.These two lip portions 7b, 8b are used to set the be provided with position of lens mount 2 at the optical axis direction of object lens 3.
The following describes the assembly method of the objective lens device that constitutes by such structure member.
Each drive coil of the focusing coil 5 that will reel with automation and tracking coil 6 lens mount 2 of packing into earlier.Use the hole 4 by projection 7a, 8a on each align member 7,8 are inserted light path from framework 1 bottom side, and this lens mount 2 is arranged on the framework 1.
By making each align member 7,8 be separated from each other setting, give elasticity to each align member 7,8.Since this elasticity, lens mount 2 easy and each align member 7,8 positive engagement.
When being arranged at lens mount 2 on the framework 1, shown in the sectional view of Fig. 5, each projection 7a, 8a front end claw are engaged in the edge part of light path with hole 4.By this method, set lens mount 2 and on the direction vertical, the position is set with the optical axis of object lens 3.And each lip portions 7b, the 8b on the align member 7,8 and the installation of lens mount 2 upper surface of object lens 3 join, set the be provided with position of lens mount 2 like this at the optical axis direction of object lens 3.
Because lens mount 2 is arranged on institute's allocation of framework 1 like this, thereby can be in this state, with support lens mount 2 with respect to framework 1 along focusing on and the messenger wire 10 that respectively hangs of tracking direction displacement sets up and is fixed on framework 1 and the lens mount 2.
Respectively hang the wiring substrate 11 of messenger wire 10 terminals with soldering is fixing, flexible fastening is on institute's fixed end face of framework 1.The patchhole 11a that hangs messenger wire 10 is set on wiring substrate 11, and (instrument of shape (not having diagram) of ロ-ト) hangs messenger wire 10 and inserts saturating these holes 11a each to use bar.Each hangs messenger wire that messenger wire 10 connects frameworks 1 insert logical space 20 after, insert the logical hole 12a that forms from relative fixed each outstanding respectively up and down support sector 12 of two sides central authorities of lens mount 2.And after each suspension messenger wire 10 is set up slotting logical space 20, fill with moistening (ダ Application ピ) agent.
At this moment, because lens mount 2 is set on 1 allocation of framework by align member 7,8, thereby insert logical respectively the suspension the hole 12a that messenger wire 10 inserts each support sector 12 sleekly from each hole of wiring substrate 11, and can alleviate because of hanging the messenger wire 10 crooked stress that hang on the messenger wire 10 that remain in.
And each hangs messenger wire 10 front ends and is set up and be disposed at each drive coil that twines focusing coil 5 and tracking coil 6 and decide on each tab 13 of lens mount 2 of end.
Each hangs messenger wire 10 front ends and is fixed on each tab 13 with scolding tin, and terminal is fixed on the wiring substrate 11 with scolding tin, in the hole of each support sector 12 12a portion, is connected on the lens mount 2 by UV cured type bonding agent.
Set up like this and respectively hang messenger wire 10, support lens mount 2 by framework 1.
And the magnetic loop that will produce effective magnetic field in each drive coil effective coverage of lens mount 2 is arranged on the framework 1.This magnetic loop is by the permanent magnet 14,15 of the identical relative configuration of a pair of magnetic pole, sets up this each yoke (yoke) 16,17 formations to the back yoke of permanent magnet 14,15 and relative with magnetic pole that each permanent magnet 14,15 is decided relative yoke portion respectively with having.These yokes 16,17 are bonded on institute's allocation on the framework 1 by bonding agent.
Set up so respectively hang messenger wire 10 in, under the state that magnetic loop forms, align member 7,8 is removed from the sidewall warpage of framework 1.Remove position limit in this way by 7,8 pairs of lens mounts 2 of each align member.
Therefore, lens mount 2 becomes the state that is supported movablely, can carry out the focus control that light beam is focused on and make the tracking Control of the signal track of pencil tracing disk on the disk signal face.
At this, form groove 18,19 respectively at the root upside of each align member 7,8, by these two grooves 18,19, be easy to warpage and go out each align member 7,8.Therefore, each align member 7,8 can easily be removed from root reliably, can not hinder the displacement of lens mount 2 because of each align member 7,8.
Remove after each align member 7,8, the light path that object lens 3 is connected and fixed on lens mount 2 with bonding agent is with on institute's allocation in hole 4.
Such assembling is assembled under the state that finishes at objective lens device as shown in Figure 4, and lens mount 2 can be supported displacement by framework 1.And,, can drive object lens 3 to focus direction by scioptics frame 2 corresponding to this focus control signal so pass through to supply with focus control signals to focusing coil 5 because the effective range of each drive coil is disposed in the effective magnetic field.And, by supplying with tracking control signal, can drive object lens 3 to tracking direction by scioptics frame 2 corresponding to this tracking control signal to tracking coil 6.
And lens mount 2 is by being arranged on the assigned position with integrally formed each align member 7,8 of framework 1, and each align member 7,8 is by with the dimensional accuracy of framework 1 moulding and desired location.
Thereby, lens mount 2 can be arranged on institute's allocation with respect to framework 1, there is not residual stress like this, be beneficial to set up and respectively hang messenger wire 10, improve the positional precision of configuration lens mount 2, by removing the light shaft offset problem that is difficult for producing object lens 3 by the position limit of 7,8 pairs of lens mounts 2 of each align member.
The invention effect
As mentioned above, adopt the present invention, because can be by the align member integrally formed with framework And the position of lens mount is limited, be configured on the framework, so need not to be used for to arrange The assembling tool of lens mount just can be disposed at lens mount on institute's allocation of framework operation Well, and because of the dimensional accuracy that do not have assembling tool and offset problem is set, so can realize one The accessory size of body formed framework improves the precision of lens mount installation site.
Particularly outstanding to the inside respectively and align member is set from the two side of lens mount, the light path that each projection that forms respectively can be inserted lens mount on each align member respectively with the hole in and make it to be engaged in the edge portion in this light path usefulness hole, thereby needn't change the shape that is used for the lens mount that engages with each align member, and owing to give elasticity, thereby be easy to engage massively lens mount to each align member.
And because the bead that align member is supported in contact is set, this bead is set lens mount in the position that is provided with of objective lens optical axis direction, so also can carry out the setting that position be set of lens mount in the objective lens optical axis direction.
Claims (6)
1. the assembly method of an objective lens device, this objective lens device has the lens mount that can support to have installed object lens with respect to the suspension element of framework displacement with drive the driving mechanism of above-mentioned object lens displacement, it is characterized in that, this assembly method comprises: will have the align member and the integrally formed operation of above-mentioned framework of projection, described projection is used for inserting the light path that is arranged on the said lens frame in order to ensure the object lens light path and uses the hole;
Above-mentioned projection is inserted light path with in the hole, carry out the operation of lens mount with respect to the framework location;
Under the state that the said lens frame is positioned, suspension element is erected at operation on said lens frame and the above-mentioned framework;
Lens mount is being supported under the state of above-mentioned framework by suspension element, with the projection of above-mentioned align member from the light path of said lens frame with the operation of removing the hole.
2. the assembly method of objective lens device according to claim 1, it is characterized in that: above-mentioned align member extends to above-mentioned lens mount from the relative side of the lens mount of the above-mentioned framework of clamping,
The positioning process of said lens frame positions by the light path of above-mentioned projection and said lens frame is engaged with the internal face in hole.
3. according to the assembly method of claim 1 or 2 described objective lens devices, it is characterized in that: on above-mentioned align member, form flange,
In the positioning process of said lens frame, lens mount and above-mentioned flange are joined, carry out the location of the optical axis direction of object lens.
4. according to the assembly method of each described objective lens device of claim 1 to 3, it is characterized in that: on the binding site of above-mentioned align member and above-mentioned framework, otch is set, with the projection of above-mentioned align member from the light path of said lens frame with the operation of removing the hole, be bending is provided with the part of above-mentioned otch, carry out and above-mentioned align member dismantled from above-mentioned framework.
5. the framework of an objective lens device, by suspension element the lens mount that object lens are installed is supported, this lens mount can displacement, it is characterized in that, the align member and the above-mentioned framework that will have projection are integrally formed, and described projection is used for inserting the light path that is arranged on the said lens frame in order to ensure the object lens light path and uses the hole; When on this framework lens mount being installed, above-mentioned align member on institute's allocation, after installing, is pulled down align member by warpage from framework with said lens frame positioning and fixing.
6. the framework of objective lens device according to claim 5 is characterized in that: on the position of align member being carried out warpage otch is set in advance.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2002166791A JP3942493B2 (en) | 2002-06-07 | 2002-06-07 | Objective lens drive |
| JP2002166791 | 2002-06-07 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1469355A CN1469355A (en) | 2004-01-21 |
| CN1219290C true CN1219290C (en) | 2005-09-14 |
Family
ID=29996413
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 03137165 Expired - Fee Related CN1219290C (en) | 2002-06-07 | 2003-06-06 | Assembling method for objective lens driving device |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JP3942493B2 (en) |
| CN (1) | CN1219290C (en) |
| TW (1) | TWI251824B (en) |
-
2002
- 2002-06-07 JP JP2002166791A patent/JP3942493B2/en not_active Expired - Fee Related
-
2003
- 2003-06-05 TW TW92115171A patent/TWI251824B/en not_active IP Right Cessation
- 2003-06-06 CN CN 03137165 patent/CN1219290C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JP2004014025A (en) | 2004-01-15 |
| CN1469355A (en) | 2004-01-21 |
| JP3942493B2 (en) | 2007-07-11 |
| TW200405315A (en) | 2004-04-01 |
| TWI251824B (en) | 2006-03-21 |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20050914 Termination date: 20140606 |