CN1224019C - Drive device of optical fetch head and its connecting device - Google Patents
Drive device of optical fetch head and its connecting device Download PDFInfo
- Publication number
- CN1224019C CN1224019C CN 02107106 CN02107106A CN1224019C CN 1224019 C CN1224019 C CN 1224019C CN 02107106 CN02107106 CN 02107106 CN 02107106 A CN02107106 A CN 02107106A CN 1224019 C CN1224019 C CN 1224019C
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- China
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- elastic body
- coupling arrangement
- read head
- lead screw
- dentation
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Abstract
The present invention relates to a driving device and a coupling device of an optical pickup. The present invention comprises the coupling device, a guide screw, a second elastic body, a power device and an optical pickup bearing base, wherein the coupling device comprises a main body, a first elastic body, a toothed device and a limiting device; the first elastic body extends out of the main body; the toothed device extends out of the first elastic body along a first direction. The guide screw is used for engaging the toothed device. The limiting device extending out of the first elastic body is used for preventing a bad engagement situation.
Description
Technical field
The present invention relates to a kind of coupling arrangement, particularly relate to the coupling arrangement of the drive unit that is used for optical read head (optical pick-up).
Background technology
Optical read head is in order to reading or to note down discs, for example digital video disc (digital videodisk, DVD) or CD (compact disk, CD) data on.The method that reads is that optical read head sends the indenture of laser to the discs of storing data earlier, then receives the laser that reflects, and is embedded in data on the discs to carry out identification.
Generally speaking, when the optical read head reading of data, discs rotation, and optical read head moves in radially (the radius direction) of discs, makes optical read head can read the everywhere on the discs.As shown in Figure 4, the pedestal 9 of bearing optical pick-up head (not shown) is connected with a connector 7 usually, and has a tusk 1 on the connector 7.Utilize the screw-threaded engagement of this tusk 1 and a lead screw (lead screw) 3, the rotation that makes coupling arrangement pass through lead screw is moved, and the drive optical read head moves along lead screw.
For optical read head can be moved smoothly, 3 of tusk 1 and lead screws need engagement good.Traditionally, making the good method of tusk 1 and lead screw 3 engagements is to install an elasticity thing 5 between tusk 1 and connector 7 additional, executes elastic force in lead screw 3 with help engagement between the two closely for tusk 1.Yet for than big bang or when rocking, such method can't prevent that still the situation that tusk 1 and lead screw 3 take off tooth from taking place.
Summary of the invention
The object of the present invention is to provide a kind of coupling arrangement that is used for optically read head driving apparatus, it makes lead screw and the engagement of dentation device well with simple mechanisms.
Another object of the present invention is providing a restraint device, is caused taking off the tooth situation and takes place because of shaking preventing between dentation device and lead screw.
The object of the present invention is achieved like this, a kind of coupling arrangement that is used for optically read head driving apparatus promptly is provided, this drive unit has a lead screw (lead screw), and propulsion system are in order to drive this lead screw rotation, this optical read head is arranged at (optical pick-uphousing) on the optical read head bearing base, this optical read head bearing base is connected with this coupling arrangement and is driven by this coupling arrangement, this coupling arrangement comprises: a main body, and this main body has an extension; One first elastic body, this first elastic body is extended by this extension, and forms an accommodation space with this main body and this extension; One dentation device (tooth-like), this dentation device is extended along a first direction by this first elastic body; And a restraint device (restriction device), this restraint device is extended to this main direction by this first elastic body, and restriction (limit) this first elastic body is one first value along the maximum moving distance of a second direction; Wherein, this lead screw moves for this coupling arrangement of guiding, and meshes this dentation and be installed on a primary importance, and the maximum engagement degree of depth is one second value, and this first direction becomes reverse direction with this second direction, and this first is worth less than this and second is worth.
The present invention also provides a kind of device of optical read head, comprising: an optically read head driving apparatus, an optical read head bearing base and a coupling arrangement, and this optical read head bearing base is connected in this coupling arrangement, and for this optical read head of carrying; Wherein:
This optically read head driving apparatus comprises:
One lead screw moves for this coupling arrangement of guiding, and this lead screw meshes this dentation and is installed on a primary importance, and the maximum engagement degree of depth is one second value, and
One propulsion system, these propulsion system are in order to drive this lead screw rotation;
This coupling arrangement comprises:
One main body has an extension;
One first elastic body, this first elastic body is extended by this extension, and and this main body between and this extension form an accommodation space;
One dentation device, this dentation device is extended along a first direction by this first elastic body; And
One restraint device, this restraint device is extended to this main direction by this first elastic body, and limiting this first elastic body is one first value along the maximum moving distance of a second direction; And
One second elastic body is positioned at this accommodation space, and this dentation device is forced in a second place, makes this dentation device and this lead screw keep engagement;
Wherein, this first direction becomes reverse direction with this second direction, and this first value is less than this second value, and this second place is lower than this primary importance.
Description of drawings
Fig. 1 is the synoptic diagram of the embodiment of the invention;
Fig. 2 a is the front schematic view of coupling arrangement;
Fig. 2 b is the front schematic view of coupling arrangement and lead screw;
Fig. 2 c is the side signal of coupling arrangement and lead screw;
Fig. 3 is the side schematic view of coupling arrangement, second elastic body and lead screw;
Fig. 4 is the side schematic view of existing connector and lead screw.
Embodiment
Say that synthetically this drive unit has a lead screw, and propulsion system are in order to drive the lead screw rotation, optical read head is arranged on the optical read head bearing base, and is connected with this coupling arrangement and by the coupling arrangement drive and move.Coupling arrangement comprises a main body, one first elastic body, a dentation device and a restraint device.First elastic body is extended by main body, and and main body between form an accommodation space.The dentation device is extended along first direction by first elastic body.Restraint device is extended by first elastic body, in order to limit the displacement of first elastic body along second direction.Second direction becomes reverse direction with first direction.Lead screw engagement dentation device.The present invention further comprises one second elastic body.Second elastic body is positioned at accommodation space.
Ask for an interview Fig. 1, it is the coupling arrangement synoptic diagram that is used for the optically read head driving apparatus of CD-ROM drive.Optically read head driving apparatus comprises propulsion system 30, in order to drive a lead screw 20 rotations, an optical read head bearing base 40, in order to bearing optical pick-up head (not shown), a coupling arrangement 10, in order to connect the bearing base 40 and the lead screw 20 of optical read head.So, coupling arrangement 10 is driven optical read head bearing base 40, and optical read head 40 is moved along lead screw 20.
Consult Fig. 2 a, Fig. 2 b and Fig. 2 c, the coupling arrangement 10 of the optically read head driving apparatus of the present invention comprises a main body (main body) 11,1 first elastic body (first elastic body) 12, one dentation device (tooth-like) 13, a restraint device (restriction device) 14, one extension (extendedportion) 111 and a limiting section (limited portion) 112.Extension 111 is extended along first direction 18 by main body 11, and first elastic body 12 is extended downwards by extension 111, and and 11 of main bodys and extension 111 between form an accommodation space 121 (space).Dentation device 13 is extended along first direction 18 by first elastic body 12.Limiting section 112 is extended to first direction 18 by main body 11.Restraint device 14 is extended to second direction 19 by first elastic body 12, and corresponding with limiting section 112, is one first value (first value) 16 in order to limit first elastic body 12 along the maximum moving distance of second direction 19.18 one-tenth reverse directions of second direction 19 and first direction.
Because first value, 16 to the second values 17 are little, even make drive unit be subjected to than big bang, dentation device 13 still can not break away from lead screw 20 and cause and take off tooth, thereby influences moving of optical read head.
As shown in Figure 3, the present invention comprises that further one second elastic body 15 is arranged in the accommodation space 121, and dentation device 13 is forced in a second place (second position) 132, makes dentation device 13 and lead screw 20 keep engagement.And it should be noted that the second place 132 is lower than primary importance 131.
Because the second place 132 is lower than primary importance 131, make that under the onesize application of force lead screw 20 is in the moment of dentation device 13, less than second elastic body 15 in the moment of dentation device 13.Therefore, second elastic body 15 can be resisted easily from the application of force of lead screw 20 in second direction 19.Help engagement so, more 20 of dentation device 13 and lead screws.
According to the foregoing description, second elastic body of the present invention is a shell fragment (flexible plate).But under same spirit, second elastic body also can be a spring (spring), all is in the category of the present invention's protection.
By the above detailed description of preferred embodiments, hope can be known description feature of the present invention and spirit more, and is not to come category of the present invention is limited with above-mentioned disclosed preferred embodiment.On the contrary, its objective is the arrangement that hope can be contained various changes and have equality in the category of the claim that the present invention will apply for.
Claims (9)
1. coupling arrangement that is used for optically read head driving apparatus, this drive unit has a lead screw, and propulsion system are in order to drive this lead screw rotation, this optical read head is arranged on the optical read head bearing base, this optical read head bearing base is connected with this coupling arrangement and is driven by this coupling arrangement, and this coupling arrangement comprises:
One main body, this main body has an extension;
One first elastic body, this first elastic body is extended by this extension, and forms an accommodation space with this main body and this extension;
One dentation device, this dentation device is extended along a first direction by this first elastic body; And
One restraint device, this restraint device is extended to this main direction by this first elastic body, and to limit this first elastic body be one first value along the maximum moving distance of a second direction;
Wherein, this lead screw moves for this coupling arrangement of guiding, and meshes this dentation and be installed on a primary importance, and the maximum engagement degree of depth is one second value, and this first direction becomes reverse direction with this second direction, and this first is worth less than this and second is worth.
2. coupling arrangement as claimed in claim 1, this coupling arrangement also comprise one second elastic body, and this second elastic body is positioned at this accommodation space, this dentation device is forced in a second place, keep engagement for this dentation device and this lead screw, wherein, this second place is lower than this primary importance.
3. coupling arrangement as claimed in claim 1, wherein this dentation device comprises a plurality of teeth that form a line, wherein in the tine length of outermost tine length less than the inboard.
4. coupling arrangement as claimed in claim 2, wherein this second elastic body is a spring.
5. coupling arrangement as claimed in claim 2, wherein this second elastic body is a shell fragment.
6. the device of an optical read head comprises: an optically read head driving apparatus, an optical read head bearing base and a coupling arrangement, and this optical read head bearing base is connected in this coupling arrangement, and for this optical read head of carrying; Wherein:
This optically read head driving apparatus comprises:
One lead screw moves for this coupling arrangement of guiding, and this lead screw meshes this dentation and is installed on a primary importance, and the maximum engagement degree of depth is one second value, and
One propulsion system, these propulsion system are in order to drive this lead screw rotation;
This coupling arrangement comprises:
One main body has an extension;
One first elastic body, this first elastic body is extended by this extension, and and this main body between and this extension form an accommodation space;
One dentation device, this dentation device is extended along a first direction by this first elastic body; And
One restraint device, this restraint device is extended to this main direction by this first elastic body, and limiting this first elastic body is one first value along the maximum moving distance of a second direction; And
One second elastic body is positioned at this accommodation space, and this dentation device is forced in a second place, makes this dentation device and this lead screw keep engagement;
Wherein, this first direction becomes reverse direction with this second direction, and this first value is less than this second value, and this second place is lower than this primary importance.
7. device as claimed in claim 6, wherein this dentation device comprises a plurality of teeth that form a line, and wherein is positioned at outermost tine length less than being positioned at inboard tine length.
8. device as claimed in claim 6, wherein this second elastic body is a spring.
9. as claim 6 a described device, wherein this second elastic body is a shell fragment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02107106 CN1224019C (en) | 2002-03-08 | 2002-03-08 | Drive device of optical fetch head and its connecting device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02107106 CN1224019C (en) | 2002-03-08 | 2002-03-08 | Drive device of optical fetch head and its connecting device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1444212A CN1444212A (en) | 2003-09-24 |
| CN1224019C true CN1224019C (en) | 2005-10-19 |
Family
ID=27810962
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 02107106 Expired - Fee Related CN1224019C (en) | 2002-03-08 | 2002-03-08 | Drive device of optical fetch head and its connecting device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1224019C (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100354948C (en) * | 2004-12-15 | 2007-12-12 | 上海乐金广电电子有限公司 | Guiding feed structure in lead screw feeding mode |
| CN101281758B (en) * | 2007-04-02 | 2011-06-08 | 鸿富锦精密工业（深圳）有限公司 | Connecting device and optical disk driver with the same |
| CN101430894B (en) * | 2007-11-09 | 2011-06-08 | 鸿富锦精密工业（深圳）有限公司 | Optical disk drive |
| CN101494060B (en) * | 2008-01-25 | 2011-08-24 | 广明光电股份有限公司 | Teeth bar structure of optical disk driver |
-
2002
- 2002-03-08 CN CN 02107106 patent/CN1224019C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN1444212A (en) | 2003-09-24 |
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