CN1122264C - Optical picking-up device - Google Patents
Optical picking-up device Download PDFInfo
- Publication number
- CN1122264C CN1122264C CN 99100456 CN99100456A CN1122264C CN 1122264 C CN1122264 C CN 1122264C CN 99100456 CN99100456 CN 99100456 CN 99100456 A CN99100456 A CN 99100456A CN 1122264 C CN1122264 C CN 1122264C
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- mentioned
- bossing
- side plate
- cover
- pickup apparatus
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- Expired - Fee Related
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Abstract
The present invention provides an optical pickup device having an execution member driving a lens support of a support object in at least a direction of focus direction or tracking direction; a cover for covering the execution member; an optical chassis for arranging a light- receiving-emitting element, the execution member and the cover are arranged to be adjustable of a correspond angle with the optical chassis, the side panel of the chassis has a projecting section enveloping the optical path of the optical element and a gap for inserting the projecting section is arranged on the side surface of the cover opposite to the side panel of the chassis.
Description
The present invention relates to the optical pickup apparatus that the signal to MD mini disk (CD) and Video CD optical record mediums such as (DVD) writes down and/or resets.
Generally, in having, optical pickup apparatus wraps in the optics chassis of the interior executive component (ア Network チ ュ エ--) of dust cover and this executive component of support, this optics chassis, respectively or with integrated state light-emitting component and photo detector are installed on its side plate, simultaneously, catoptron is installed on the bottom surface, and this catoptron is positioned in the middle of the light path from the light-emitting component to the photo detector.
On the other hand, executive component has the light beam that penetrates from light-emitting component is gathered as object lens on the record surface of the CD of recording medium and electromagnetic actuator device that the lens bracket that these object lens are housed is driven to CD focus direction and tracking coil direction.Lens bracket is supported on the base of executive component with elastic type by linkage or many cables.And, under the situation of the optical pickup apparatus that adopts this type of drive of so-called moving coil, constitute electromagnetic actuator device by the focusing coil on lens bracket and tracking coil and the magnetic circuit that is fixed on the base, and under the situation of the optical pickup apparatus that adopts this type of drive of so-called moving-magnet, by the magnet and the focusing coil that is installed on the base that are fixed on the lens bracket, and tracking coil constitutes electromagnetic actuator device.
Dust cover is fixed on the base, so that cover each constitutional detail of executive component, forms the opening that object lens are exposed above the dust cover at this.
The mirror reflection if the optical pickup apparatus that employing constitutes like this, the light beam that then penetrates from light-emitting component are reflected, guiding gathers on the record surface of CD light beam to object lens by these object lens.And the Returning beam that is reflected by cd-rom recording surface is mapped on the photo detector through object lens and catoptron.
This optical pickup apparatus correctly gathers on the record surface of CD in order to make light beam, must make the record surface of the optical axis of object lens perpendicular to CD when these object lens are installed.Therefore, the past, executive component and cover are mounted to and can swing with respect to optics chassis, at assembling stage,, eliminate of the inclination of the optical axis of object lens with respect to cd-rom recording surface by adjusting executive component and cover setting angle with respect to optics chassis.This optical pickup apparatus (speciallyying permit communique referring to Japan's bulletin: flat 4-62133 number) is known.
But, the optical pickup apparatus in above-mentioned past, by cover and executive component are shaken with respect to optics chassis, come the optical axis of the object lens installed on the executive component in the cover is adjusted, so the gap more than needing to a certain degree between the cover side on the side plate of the optics chassis that photo detector and light-emitting component are housed and opposite thereof is if can not fully guarantee this gap, then the side plate of optics chassis can be run in the side of cover, causes the optical axis that can't adjust object lens.
Yet, if between the side plate of optics chassis and cover side, form the gap like this, then the dust that swims in the air invades in the light path between photo detector and/or light-emitting component and the catoptron by this gap easily, especially adhere to dust probably on the light-emitting area of the sensitive surface of the photo detector of being installed near the optics chassis side plate this gap and/or light-emitting component, its result can cause degradation problem under the signal quality that reads from cd-rom recording surface.
The present invention proposes in order to address the above problem just, its purpose is: a kind of optical pickup apparatus is provided, it guarantees to adjust under the situation of needed adequate space for carrying out objective lens optical axis between the side plate of optics chassis and cover side, reduces and adhere to dust on photo detector and/or light-emitting component.
In order to achieve the above object, the present invention takes following technical scheme:
A kind of optical pickup apparatus, it has:
Executive component, its setting make and keep the lens bracket of object lens can and follow to focus direction at least
A certain direction in the track direction moves;
Cover is used to cover this executive component; And
Optics chassis is equipped with on its side plate and is subjected to light and/or luminous optical element,
Above-mentioned executive component relative above-mentioned optics chassis with above-mentioned cover is installed into can adjust angle, and this optical pickup apparatus is characterised in that:
The bossing that the light path of above-mentioned optical element is surrounded is set on the side plate of above-mentioned optics chassis, and the side of the above-mentioned cover on this side plate opposite is provided with the breach that above-mentioned bossing is inserted simultaneously.
Described optical pickup apparatus is characterized in that:
The marginal portion of above-mentioned breach and the outside surface of above-mentioned bossing are made into similar shape in the part at least.
Described optical pickup apparatus is characterized in that:
The outside surface of above-mentioned bossing is the garden tubular substantially, and half garden shape part is set on the marginal portion of above-mentioned breach.
Described optical pickup apparatus is characterized in that:
Above-mentioned bossing is that the side plate with above-mentioned optics chassis is integral, and is outstanding and form on this side plate.
A kind of optical pickup apparatus, it has:
Executive component, its setting can the some directions in focus direction and tracking direction move the lens bracket that object lens are kept at least;
Cover is used for this executive component is covered; And
Optics chassis has been installed on its side plate and has been subjected to light and/or radiative optical element,
Above-mentioned executive component relative optics chassis with above-mentioned cover is installed into can adjust angle,
This optical pickup apparatus is characterised in that:
The bossing that the light path of above-mentioned optical element is surrounded is set on the side plate of above-mentioned optics chassis, simultaneously, on the side of the above-mentioned cover on this side plate opposite, be provided with breach, described breach, it is similar to the external surface shape of above-mentioned bossing that its marginal portion has at least the shape of a part to be made into, and it is inserted by above-mentioned bossing.
Described optical pickup apparatus is characterized in that:
The outside surface of above-mentioned bossing is the garden tubular substantially, is provided with half garden shape part on the marginal portion of above-mentioned breach.
Described optical pickup apparatus is characterized in that:
Above-mentioned bossing is that the side plate with above-mentioned optics chassis is integral, and is outstanding and form on this side plate.
Optical pickup apparatus of the present invention has:
Executive component, its installment state can a certain direction in focus direction and tracking direction move the lens bracket of supporting object lens at least;
Cover is used to cover this executive component; And
Optics chassis is equipped with on its side plate and is subjected to light and/or luminous optical element,
Above-mentioned executive component and above-mentioned cover are installed into the relative angle that can adjust with above-mentioned optics chassis, and this optical pickup apparatus is characterised in that:
The bossing that the light path of above-mentioned optical element is surrounded is set on the side plate of above-mentioned optics chassis, and the while is provided with on the side of the above-mentioned cover on this side plate opposite and can makes above-mentioned bossing insert its inner breach.
If adopt this structure, even then between the side of the side plate of optics shell and cover, guarantee to adjust needed ample clearance for carrying out objective lens optical axis, dust is deposited on the outside surface of bossing, so can reduce the dust that is attached on the optical element in a large number in this gap.
In the above-described configuration, the outside surface of the bossing of the marginal portion of the breach of cover and optics shell, at least a portion is preferably made similar shapes.For example the outside surface of bossing is made the garden barrel shape substantially, forms half garden shape on the marginal portion of breach, like this, can reduce the interval between the marginal portion of the outside surface of bossing and breach, can more effectively reduce the dust that is attached on the optical element.
Moreover, in the above-described configuration, make the side plate of bossing and optics chassis form an integral body, can reduce number of spare parts like this.
Above-mentioned optical element, photo detector and light-emitting component both can be an integral body, also can be respectively independent parts.Under the situation on the side plate that photo detector and light-emitting component is installed in optics chassis respectively, each light path of these photo detectors and light-emitting component is provided with bossing, each breach that this bossing is surrounded is set on cover gets final product.
Effect of the present invention:
As mentioned above, if adopt optical pickup apparatus of the present invention, then because the bossing that the light path of optical element is surrounded is set on the side plate of optics chassis, while is provided with breach on the side of the cover on this side plate opposite, the fore-end of bossing is inserted in this breach, even so between the side of the side plate of optics chassis and cover, guarantee to be to adjust the required sufficient clearance of objective lens optical axis, also can make dust in this gap, be deposited on the outside surface of bossing, therefore, can suppress dust invades in the light path of optical element and is attached on the surface of this optical element.
Following with reference to accompanying drawing, describe embodiments of the invention in detail:
Fig. 1 relates to the optical pickup apparatus planimetric map of the embodiment of the invention.
Fig. 2 is the sectional drawing along the A-A line of Fig. 1.
Fig. 3 is the sectional drawing along the B-B line of Fig. 1.
Fig. 4 is the oblique view that the state in the cover that optical pickup apparatus had of Fig. 1 is covered executive component in expression.
Below with reference to the accompanying drawings, describe the present invention in detail.Fig. 1 is an optical pickup apparatus planimetric map of the present invention; Fig. 2 is the sectional drawing along the A-A line of Fig. 1; Fig. 3 is the sectional drawing along the B-B line of Fig. 1; Fig. 4 is the oblique view of the state that covered by cover of the executive component that optical pickup apparatus had of presentation graphs 1.
As shown in these figures, the optical pickup apparatus of present embodiment is substantially by constituting with the lower part:
Dustproof cover is surrounded by executive component 2 in it.
As described below, executive component 2 and cover 3 form an integral body.
Be provided with garden tubular bossing 10 on the medial surface of side plate 4, this bossing 10 extends to horizontal direction (right among Fig. 2), so that reach through hole 6 is surrounded.And, on the middle body of the bottom surface of optics chassis 1 1a, fix catoptron 11 with 45 degree established angles.
The light beam that penetrates from light emitting and receiving component 8 reflects to vertical direction on retrodirective mirror 11 by reach through hole 6.Make its optically focused on the record surface of CD by following object lens 12.Then, the Returning beam that reflects on the record surface once more by object lens 12 on catoptron 11 to horizontal direction reflection, be subjected to light by reach through hole 6 by light emitting and receiving component, like this can the signal of playback record on CD.
Lens bracket 13 is used to support object lens 12;
Base 14 is used for by many cables 19 this lens bracket 13 being carried out elastic bearing; And
Electromagnetic actuator device, (diagram of this electromagnetic actuator device is omitted to be used for driving lens bracket 13 to CD focus direction and tracking direction, its component part comprises: be installed in focusing coil and the tracking coil on the lens bracket 13 and be fixed on permanent magnet on the base 14)
Object lens 12 be positioned at catoptron 11 just above.The cover that these constitutional details of executive component 2 all are box-like substantially can cover, and cover 3 utilizations are lifted methods such as buckleing combination and are fixed on the base 14.But object lens expose the formed opening 15 above 12 covers 3, do not hinder light beam to pass through.
As shown in Figure 3 and Figure 4, on the lower end of a side 3a of the cover 3 on side plate 4 opposites that are positioned at optics chassis 1, form half garden breach 16, between the medial surface of this side 3a and side plate 4, guarantee the clearance G of predetermined distance, and, fore-end at bossing 10 is inserted under breach 16 internal states, and executive component 2 and cover 3 are installed on the bottom surface 1a of optics chassis 1.At this moment, the assembly parts of executive component 2 and cover 3 are installed with following installation screw 18 and adjustment screw (diagram is omitted), and this installation screw 18 is inserted in the volute spring 17 from the top of base 14, is screwed in the bottom surface 1a of optics chassis 1; This adjustment screw has 2, by the hole of this bottom surface 1a, relies on screw thread to be screwed in the base 14 from the below of the bottom surface 1a of optics chassis 1.By adjusting the screwing force that these adjust screw, can adjust the inclined light shaft degree of object lens 12.Its details is: the cardinal principle center that has formed below base 14 with object lens 12 is the land portions of its central point, simultaneously, on the 1a of the bottom surface of optics chassis 1, be provided with ring-type pedestal part, when adjusting the screwing force of 2 adjustment screws, the land portions of base 14 partly contacts with the ring-type pedestal on one side, Yi Bian slide, base 14 is shaken, therefore can adjust angle, make the optical axis of object lens 12 and cd-rom recording surface perpendicular.
The optical pickup apparatus of this structure, between the side 3a of the cover 3 on the side plate 4 of its optics chassis 1 and opposite thereof, guarantee the clearance G of predetermined distance, so when adjusting the optical axis of object lens 12, the side 3a of cover 3 can not collide the medial surface of the side plate 4 of optics chassis 1.And, the breach 16 that in this clearance G, is arranged on the bossing 10 on the side plate 4 and on the 3a of the side of cover 3, forms, (from the top of Fig. 2) is overlapping from the plane, so, be positioned at the side 3a inner face of cover 3 as the openend of the reach through hole 6 of the light path of photo detector 8.Therefore, even the dust that swims in the air is fallen in the clearance G, this dust also only is to be deposited on the outside surface of bossing 10 of the inner bottom part that is positioned at clearance G, seldom might be attached on the reflecting surface of the surface of light emitting and receiving component 8 or catoptron 11, thereby can improve the dustproof effect of cover 3 by the openend of reach through hole 6.
Moreover, the foregoing description has illustrated the situation that is provided with half garden v notch v 16 of local similar with respect to garden tubular bossing 10, but also can be made into other shapes to bossing 10 and breach 16, its main points are that the bossing 10 that reach through hole 6 is surrounded is set on the side plate 4 of optics chassis 1, as long as the fore-end that forms on cover 3 for this bossing 10 inserts required breach 16.But by bossing 10 and breach 16 being made the shape of broadly similar, the width that can make formed gap between the marginal portion of the outside surface of bossing 10 and breach 16 keeps certain substantially along the outside surface of bossing 10, the width in this gap can local not increase to and surpass the degree that needs, so, can further reduce the dust that on light emitting and receiving component 8 and catoptron 11, adheres to.
Moreover above-mentioned bossing 10 also can separate with side plate 4 and is fixed on this side plate 4 after making with other material.If but form optics chassis 1 with methods such as aluminum dipping form castings, make bossing 10 and side plate 4 form an integral body, can reduce number of spare parts so.
Claims (7)
1. optical pickup apparatus, it has:
Executive component (2), its setting make and keep the lens bracket (13) of object lens (12) a certain direction in focus direction and tracking direction to move at least;
Cover (3) is used to cover this executive component (2); And
Optics chassis (1) is equipped with on its side plate (4) and is subjected to light and/or luminous optical element (8),
The relative above-mentioned optics chassis with above-mentioned cover (3) of above-mentioned executive component (2) (1) is installed into can adjust angle, and this optical pickup apparatus is characterised in that:
The bossing (10) that the light path of above-mentioned optical element (8) is surrounded is set on the side plate (4) of above-mentioned optics chassis (1), and the side of the above-mentioned cover (3) on this side plate (4) opposite is provided with the breach (16) that above-mentioned bossing (10) is inserted simultaneously.
2. optical pickup apparatus as claimed in claim 1 is characterized in that:
The outside surface of the marginal portion of above-mentioned breach (16) and above-mentioned bossing (10) is made into similar shape in the part at least.
3. optical pickup apparatus as claimed in claim 2 is characterized in that:
The outside surface of above-mentioned bossing (10) is the garden tubular substantially, and half garden shape part is set on the marginal portion of above-mentioned breach (16).
4. optical pickup apparatus as claimed in claim 1 is characterized in that:
Above-mentioned bossing (10) is that the side plate (4) with above-mentioned optics chassis (1) is integral, and goes up outstanding and forms at this side plate (4).
5. optical pickup apparatus, it has:
Executive component (2), its setting can the some directions in focus direction and tracking direction move the lens bracket (13) that object lens (12) are kept at least;
Cover (3) is used for this executive component (2) is covered; And
Optics chassis (1) has been installed on its side plate (4) and has been subjected to light and/or radiative optical element (8),
The relative above-mentioned optics chassis with above-mentioned cover (3) of above-mentioned executive component (2) (1) is installed into can adjust angle,
This optical pickup apparatus is characterised in that:
The bossing (10) that the light path of above-mentioned optical element is surrounded is set on the side plate (4) of above-mentioned optics chassis (1), simultaneously, on the side (3a) of the above-mentioned cover (3) on this side plate (4) opposite, be provided with breach (16), described breach (16), it is similar to the external surface shape of above-mentioned bossing (10) that its marginal portion has at least the shape of a part to be made into, and it is inserted by above-mentioned bossing (10).
6. optical pickup apparatus as claimed in claim 5 is characterized in that:
The outside surface of above-mentioned bossing (10) is the garden tubular substantially, is provided with half garden shape part on the marginal portion of above-mentioned breach (16).
7. optical pickup apparatus as claimed in claim 5 is characterized in that:
Above-mentioned bossing (10) is that the side plate (4) with above-mentioned optics chassis (1) is integral, and goes up outstanding and forms at this side plate (4).
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP025886/98 | 1998-02-06 | ||
| JP025886/1998 | 1998-02-06 | ||
| JP10025886A JPH11232678A (en) | 1998-02-06 | 1998-02-06 | Optical type pickup |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1233825A CN1233825A (en) | 1999-11-03 |
| CN1122264C true CN1122264C (en) | 2003-09-24 |
Family
ID=12178278
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 99100456 Expired - Fee Related CN1122264C (en) | 1998-02-06 | 1999-01-29 | Optical picking-up device |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JPH11232678A (en) |
| CN (1) | CN1122264C (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7246364B2 (en) * | 2002-10-15 | 2007-07-17 | Sharp Kabushiki Kaisha | Optical pickup device |
-
1998
- 1998-02-06 JP JP10025886A patent/JPH11232678A/en active Pending
-
1999
- 1999-01-29 CN CN 99100456 patent/CN1122264C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH11232678A (en) | 1999-08-27 |
| CN1233825A (en) | 1999-11-03 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C06 | Publication | ||
| PB01 | Publication | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20030924 Termination date: 20140129 |