CN100419875C - Switcher of optical pickup excitor - Google Patents

Abstract

This invention is a mirror shift device in light collecting exciter at disk shifting of several wave light sources. The device includes several mirrors supporting carriage, coils to drive the carriage, fixed supporting frame of exciter, electronic induction material connected to the fixed supporting frame of exciter for shifting according to light source wave of the mirrors. This device makes it available for shifting blue laser large data memory device of BD level with CD/DVD level.

Description

Switcher of optical pickup excitor

Technical field

When the laser-optical disk that the invention relates to several wavelength light sources exchanges, pick up at light and to carry out the object lens device for switching in the driver.Particularly, the vertical direction of several object lens in disk track constitutes a driver, so because using of electromagnetically induced material can the whole drivers of vertical moving as the center with optical axis, use the object lens after wavelength in above-mentioned several wavelength can switch examination.

Background technology

Recently, along with the development of Digital Media (Digital Media) technology, various high quality content (High Quality Contents) has appearred in music, film, animation etc., and the recording medium of storage foregoing (Contents) also presents variation.

In addition, along with the lightweight and the miniaturization of notebook computer (Notebook), camcorder (Camcoder), digital camera data equipments such as (Digital Camera), more and more stronger to the miniaturization and the high capacity requirement of information storage medium.

Driver uses the drive coil form to move according to permanent magnet field, can make object lens move to assigned address.

At this moment,, fix, can specify required frequency characteristic according to the requirement of supporting operation according to epistasis and the decay property that operation partly has.Operation is partly done the motion of going forward side by side to the focusing and the tracking direction of orthogonal both direction; In order to reduce the error of optical signalling, must reach without spin or the unnecessary vibration identical with torque.

The light beam of the optically focused that begins from general object lens is according to the rotation of CD, for the vibration and the off-centre of CD, is that the object lens running gear that the CD signal track center is followed at the center moves with light picker with luminous point (spot).

This object lens running gear is known as light and picks up driver (Acatuator), and object lens can focus on (Focusing) and follow the tracks of (Tracking) operation; Can move the operation of the different radii and the tangent direction of inclination as required.

Focusing operation moves up and down object lens, makes the luminous point of the light beam that begins from object lens enter focus in the CD signal magnetic track; Operation about following the tracks of operation and carrying out, the luminous point of the light beam that begins from object lens is that standard is followed the CD signal magnetic track with the center.

Summary plane and front schematic view that the (a) and (b) of Fig. 1, the existing light of (c) expression pick up driver.

General light picks up driver, uses coil and magnet, and electric current that flows according to coil and the electromagnetic force between the magnet make driver carry out work.

Shown in Fig. 1 (a), represent that existing light picks up the generalized schematic of driver.This light picks up driver and mainly is made of following part.Driver 101 begins from the center to the outer peripheral face direction focusing and in order to carry out the lens holder (lens holder) 102 that focusing coil 106 is connected with tracking coil 105; For two side directions at said lens bracing frame 102 form electromagnetic circuit, and magnet (magnet) 103 and the yoke (Yoke) 104 installed; In order to support lens holder 102, at the fixing upper and lower a plurality of line suspenders (wire suspension) 107 of an end of the upper and lower fixing machine plate 108 of said lens bracing frame 102; The other end of the line suspender 107 that one side of said lens bracing frame 102 is prepared is by supporting that fixedly vibroshock bracing frame 109 grades of vibroshock partly constitute.

As mentioned above, we pick up driver to existing light with reference to the accompanying drawings and are elaborated below.

As shown in the figure, this driver mainly comprises following a plurality of part.

Object lens 101 lens holder 102 partly partly; For the peripheral surface of condenser lens bracing frame 102, and the focusing coil 106 of use spiral partly; In order to follow the tracks of, the tracking coil 105 of the spiral that adheres on suitable direction between each angle partly constitutes.

And, at the left and right sides of said lens bracing frame 102, a plurality of yokes 104 of ferromagnetism material structure thing; Fixed magnet 103 then; Above-mentioned yoke 104 is that integrated material can form one with pick-up pedestal (not having diagram) so owing to what use.

The center, side, upper and lower part of this lens holder 102 partly partly is connected with fixed connecting plate 108; Each fixed head 108 has the other end of 2 parallel line suspenders 107, and the vibroshock bracing frame 109 that a side of scioptics bracing frame 102 is prepared is fixed on the motherboard.

Vibroshock bracing frame 109 inside here have the line suspender 107 of epistasis, in order to prevent its decay property, are connected with vibroshock (not having diagram).Be connected the other end of fixing above-mentioned line suspender 107 with outside motherboard (not having diagram).

107 pairs of said lens 102 of such line suspender compensate, and play the effect of current supply junction line.

As mentioned above, below simple explanation is carried out in the operation of driver.Tracking coil 105 attached to lens holder 102 twines mutually in suitable direction, makes electric current continue to flow to correct direction.According to this fixing magnet 103 and electromagnetic force, make it produce repulsion and folder power.

If according to top described, according to repulsion and folder power, owing to the operation of lens holder 102 will be moved with tracking direction (forward and backward), so must use tracking servo to operate in order to reduce tracking error.

And focusing coil 106 vertical direction different with tracking coil carried out spiral, and electric current just can upwards flow at the upper and lower of magnetic flux direction.The magnetic flux of fixing magnet 103 and the effect of electromagnetism can produce strength in the vertical direction of coil 105, move in focus direction (upper and lower) in order to guarantee lens holder 102, must use focus servo to operate.

As mentioned above, the outer peripheral face of lens holder 102 uses coil 106 and 105 backs to twine, and moves to coil focusing and tracking direction with lens holder 102, and this we are called mobile (moving) coil direction to it.After with the opposing face of the outer peripheral face of lens magnet being installed, magnet is referred to as " magnet move mode " with the process that lens holder moves.

At this moment, the move mode according to magnet and coil utilizes the Fu Laiming lefft-hand rule.

(b) of Fig. 1 and (c) figure expression, the front schematic view of existing 2 drivers.

In addition,, the processing requirements of high image quality animation is also increased thereupon, so the requirement of the data storage capacity of optical storage disk (Optical Disk) is also being increased apace along with the consumer constantly increases the advanced demand of image quality.

This requirement has only blue laser (Blue Laser) the level optical system (optical system) of new research and development to satisfy, according to the optical design that the wavelength of blue laser (Blue Laser) carries out, researched and developed the light picker design of suitable special-purpose lens exploitation.

But, in order to exchange with existing CD (Compact disk) and the DVD (digital video disk) of red laser (Red Laser) of using, develop simultaneously can correspondence all laser (Laser) wavelength object lens be very important.But exist many differences between the multiple technologies, the exploitation that can carry out the object lens of Access simultaneously is in the very condition of difficulty.

Therefore,, optical head is divided into 2, does not drive the space, and client is also difficult to accept in price but there is residue in order to use 2 kinds of systems to exchange.

So use a light that comprises 2 optical designs to pick up magnetic head, just can use Red laser and blue laser system (Blue laser system) simultaneously.Promptly CD and the 3 kinds of medium of DVD, BD (Blu-ray) to present standard can exchange simultaneously, develop this light picker and are necessary.

Handling in order to carry out Access simultaneously to existing multiple medium, use 2 object lens to constitute a driver (Actuator), is that example describes with 90 degree blocked operations below.

Fig. 2 and Fig. 3 represent, for 2 laser (Lens) 211,212 of existing BD of correspondence and CD/DVD2 wavelength constitute the synoptic diagram of drivers (Actuator), comprises tracking coil 205, lens fixture 202, magnet 203, yoke 203, focusing coil 206 etc.As shown in Figure 3, the operation that 2 laser (Lens) are installed is carried out 90 degree rotations partly according to the inner space, switches the mode of object lens.

Fig. 4 represents to use when existing object lens are switched an example schematic diagram of driver.

The structure of the driver (Actuator) that uses when as shown in the figure, object lens switch in the present invention is made up of following part.The position, above and below of framework (Frame) constant excitation device (Actuator), according to power transmission mechanism 408, driver is to the track direction moving linearly of disk, and the part that object lens 401 and 402 are switched constitutes.

The operation of above-mentioned other inscape of Fig. 4 and above-mentioned Fig. 1 have points of resemblance, so following is carried out simple declaration.

The object lens 402 that object lens 401 that blue laser (Blue Laser) BD uses and red laser (Red Laser) CD/DVD use are supported by object lens 405; The driving of above-mentioned object lens is provided by drive coil 406 and drive magnet 403; Above-mentioned drive magnet is supported by driving yoke 404.

One side of above-mentioned object lens and opposite side are partly fixing by line 409, and above-mentioned line is connected and fixed by driver fixing support rack 407.

In addition, above-mentioned driver fixing support rack is operated according to fan-shaped drive motor 408.Fig. 4 represents, the formation synoptic diagram of the locational Actuator of both direction of the disk of recording medium.

At the origin position of disk, its formation must make object lens 501 and 502 vertical direction to magnetic track move; In order to satisfy the condition of 2 object lens 501 and 502 simultaneously, the object lens position of each CD/DVD and BD must move to the middle position of track direction optical axis.

To according to transmitting device of the present invention, all drivers (Actuator) are transmitted to the track direction of disk below, and switch and describe.

That is, shown in Fig. 5 (a), expression be the central authorities that object lens that BD is used arrive optical axis, driver fixing support rack 507 is according to fan-shaped drive motor 508, the situation of Yi Donging to the right.

In addition, what Fig. 5 (b) represented is the central authorities that make the object lens arrival optical axis of CD/DVD use after switching, the situation that driver fixing support rack 507 moves to the left according to fan-shaped drive motor 508.

Fig. 6 (a) and (b) are represented, on the direction, this object lens position are carried out the synoptic diagram of blocked operation on driver (Actuator).

At first, the object lens of optical axis center position switch to the disk track direction according to driver (Actuator) transmitting device according to the variation of system, switch the object lens position of the optical axis center that meets current system.

So, can switch 2 object lens, the light pick-up system that the blue laser (Blue laser) of (Red laser) optical design of CD/DVD red laser and BD can exchange to required direction.

In addition, 2 or 3 drivers of line style (Actuator) that the driver (Actuator) that uses this moment can use existing high characteristic high power speed to use can be guaranteed and high power speed corresponding characteristic.

In addition, 3 drivings also are to be made of drive system, and 2 lens centers that exist with vertical mode are as axle, because the inclination (Tilt) of optics (Radial) direction can drive the place switching position, so can carry out more compensation to the inclination (Tilt) of 2 lens remaining.

For above-mentioned Fig. 6 (a) and (b), please refer to above-mentioned Fig. 4 and Fig. 5, carry out simple declaration below.

The light of the light source of exporting from light source by catoptron 609, enters the object lens 601 that BD uses.In order to achieve the above object, fan-shaped drive motor 607 moves driver fixing support rack 608 to the right.Other magnet 603 is identical with the explanation of above-mentioned Fig. 1 and Tu with yoke 604.

Fig. 6 (b) expression, the light from the light source of light source output by catoptron 609, enters the object lens 602 that CD/DVD uses.In order to achieve the above object, fan-shaped drive motor 607 moves driver fixing support rack 608 to the left.

But, as mentioned above.The circuit that object lens in it constitutes and switchover operation partly change when switching will reach conversion according to this circuit and focus on the effect that (Focus) drove and followed the tracks of the position of (Track) driving, and it constitutes difficulty very.Driver (Actuator) driving part is bigger, so for correspondence and improve high power speed and highdensity performance, this point is very difficult.

In addition, the loop that is formed centrally in axle being does not have degree of freedom so handle (guide) operation inclination (Tilt) direction partly, just can not constitute the driver (Actuator) for compensating for tilt (Tilt).

Therefore, the performance that can bring into play in an existing lens drive system can be met, and can become a driver (Actuator) in order to make 2 lens, moves the operation part that comprises all loops, switches object lens and is very important to optical axis.

Simultaneously, pick up in the magnetic head, must switch identical therewith each driver (Actuator) during system changeover, switch object lens effectively and make corresponding being necessary of 2 laser (Laser) wavelength at a light.

Summary of the invention

Therefore, the objective of the invention is for a kind of switcher of optical pickup excitor is provided, the performance that can bring into play in an existing lens drive system can be met, for 2 lens combination are synthesized a driver (Actuator), move comprise all loops operation partly, switch a kind of scheme of object lens to the optical axis.

Another object of the present invention provides a kind of switcher of optical pickup excitor, pick up in the magnetic head at a light, when carrying out system changeover, must switch each driver (Actuator), switch object lens effectively and make itself and the corresponding a kind of motion of a plurality of laser (Laser) wavelength.

Another purpose is exactly a kind of switcher of optical pickup excitor that will provide, and comprises the lens holder of a plurality of object lens and the support part of support said lens; To driver fixing support rack one side shifting, the wavelength of the light source that uses according to above-mentioned a plurality of object lens, electromagnetic force induces element to be connected the running gear that is constituted with above-mentioned driver fixing support rack.

To achieve these goals, switcher of optical pickup excitor of the present invention has following a plurality of part to constitute: the lens holder that comprises a plurality of object lens; Make the coil and the magnet of the operation of said lens bracing frame; The driver that comprises the driver fixing support rack that the support member of supporting the said lens bracing frame is fixing; The wavelength of the light source that uses according to above-mentioned a plurality of object lens, above-mentioned driver fixing support rack is connected the part that it can be switched with induced material.

Effect of the present invention:

As mentioned above, according to switcher of optical pickup excitor of the present invention, use in the BD level high capacity optical information equipment of current blue laser (Bluelaser) and can exchange use fully existing DC/DVD level information storing device.

In addition, the present invention moves switching according to the drive principle of electromagnet and permanent magnet to whole drivers that 2 object lens have been installed, therefore driver is installed in fixed pedestal (Base), and the yoke Yoke of electromagnet can firmly fix the line operate of going forward side by side according to the suction of permanent magnet.

In addition, do not utilize under the situation that the guides that slides between driver and the fixed pedestal (base) changes, can carry out straight line and switch the linear drives structure that makes it to arrive assigned address.

Also have,,,, can be suitable for light inclination (Radial tilt) compensate function from the central shaft of the lens of arranging arranged side by side on identical axle according to existing 3 driving drivers even 2 object lens are used in switching.

For further specifying above-mentioned purpose of the present invention, design feature and effect, the present invention is described in detail below with reference to accompanying drawing.

Description of drawings

The (a) and (b) of Fig. 1, (c) expression, existing light picks up the general view and the front schematic view of driver.

Fig. 2 (a) and (b) and Fig. 3 represent, the synoptic diagram of the driver that existing 2 Lenss corresponding with BD and CD/DVD2 wavelength constitute.

Fig. 4 represents, an embodiment synoptic diagram of the driver that existing object lens use when switching.

Fig. 5 (a) and (b) are represented, the vertical switching floor map of several object lens.

Fig. 6 (a) and (b) are represented, the vertical switching front schematic view of several object lens.

Fig. 7 represents, according to driver switching device shifter synoptic diagram of the present invention.

Fig. 8 represents, the switching organigram that driver slides.

Fig. 9 (a)～(e) expression is according to electromagnet 904 with switch strength principle between the electromagnet 901,905, to carrying out the synoptic diagram that operation logic that straight line switches describes.

Figure 10 (a) and (b) are represented, switch left-right symmetric that drives structure and driver or the formation synoptic diagram of being partial to one side.

Embodiment

An embodiment to switcher of optical pickup excitor of the present invention describes below.

The embodiment of the invention is that a plurality of object lens have constituted a driver on the vertical direction of recording medium magnetic track, moves above-mentioned driver and moves to optical axis center, makes the object lens of its corresponding light source that uses carry out the process of switchover operation.

The foregoing description has also comprised, and electromagnetic force is induced the included magnet of element, supported the material and the coiled conductor of above-mentioned magnet.

In the above-described embodiments, also comprise in order to control electromagnetic force and induce the operation of element, the material of control electric power polarity.

In the above-described embodiments, according to the electric power polarity of change connection coiled conductor lead, conductor has just formed electromagnetic force with the magnet of the parallel formation of above-mentioned conductor.

In the above-described embodiments, conductor is set under the situation of the N utmost point with the magnet that is connected part, and electric current flows to time orientation (from left to right), and just produced suction this moment between conductor and left side magnet.

In the above-described embodiments, conductor is set under the situation of the S utmost point with the magnet that is connected part, and electric current flows to the opposite direction of time, has just produced the effect of folder power between conductor and the left side magnet.

In the above-described embodiments, comprise the lens holder and the driver that comprises the driver fixing support rack that is connected with the said lens bracing frame of a plurality of object lens, in pedestal, slide.

In the above-described embodiments, magnet has formed a pair of.

In the above-described embodiments, electromagnetic force induces element to use in the one or both sides of driver fixing support rack.

Embodiment to switcher of optical pickup excitor of the present invention is elaborated below with reference to accompanying drawings.

At first, we learn about that summary of the present invention constitutes and purpose.

Support the lens holder of a plurality of object lens, the driver that uses metal wire spring (Wire Spring) or Pan spring (Spring) to support constitutes an operation partly, can focus on and the light of tracking or banking motion picks up driver, switch the driver that object lens and optical axis are consistent according to system and switch mobile device, utilize the principle (electromagnetic force is induced element) of magnet and electromagnet.

Above-mentioned electromagnetic force induces element to be made of formed coiled conductor between a pair of magnet that constitutes and the above-mentioned magnet.

Constitute above-mentioned a pair of situation, be illustrated below.The change in polarity of the polarity of 2 magnet of control and central electromagnet (twining the conductor of lead) can be switched mobile to above-mentioned electromagnet.

Electromagnetic force induces element to be made of the one side or the symmetria bilateralis of driver fixing support rack.

The operation of optical pick-up exciter is made of pedestal (Base) and can carries out taxi operation.

As shown in Figure 7, expression is driver switching device shifter synoptic diagram.

As shown in the figure, to pick up the formation of driver identical with above-mentioned Fig. 4 for light.

What drive just that material that above-mentioned light picks up driver uses is that electromagnetic force is induced element.

At first above-mentioned light being picked up driver operation partly below describes.

Light picks up driver and mainly is made of following part.A plurality of object lens 701 and 702 outer peripheral faces from curved surface are with the lens holder (lens holder) 705 that is connected for the tracking coil of following the tracks of 706; For the both sides in said lens 705 form electromagnetic circuit, and the magnet 703 and the yoke 704 that are provided with; For supporting lens holder 705, at the part up and down of said lens bracing frame 705, a plurality of line suspenders 709 that an end is fixing; The part such as vibroshock 707 grades that the other end of the line suspender 709 that one side of support said lens bracing frame 705 connects is fixing.

As the above, below with reference to accompanying drawings light is picked up driver and describe.

Also comprise at lens holder 705 places at object lens 701 and 702,, focusing coil (not having diagram) is carried out spiral for around lens holder 705, focusing on; In order to follow the tracks of, the tracking coil 706 that suitable direction winds the line between each angle partly.

And, at the left and right sides of said lens 705 a plurality of yokes 704 of strong magnetic material, fixed magnet 703 are arranged; Above-mentioned yoke 704 since with optical pickup base (Fig. 8 810) so formed integrated for same material.

Below this lens holder 705, be illustrated.The side, upper and lower part is connected with the fixing machine plate (not having diagram) of central part, what each fixing machine plate was adopted by an end of 2 parallel line suspenders 709 is soldering, and a side vibroshock 707 of the other end scioptics bracing frame 705 of above-mentioned line suspender is fixed with motherboard.

As mentioned above, below simple declaration is carried out in the operation of driver.The tracking coil of installing on the lens supports 705 706 twines with mutual suitable direction, and electric current makes it produce magnetic flux according to the direction of determining when flowing, and this fixing drive magnet 703 and electromagnet will produce repulsion and folder power.

So, according to repulsion and folder power, owing to the operation of lens holder 705 is moved to tracking direction (forward and backward) direction, so the tracking servo that uses for compensatory tracking error operation.

Simultaneously, focusing coil (do not have diagram) winds the line to the vertical direction different with tracking coil, and will to appear at upper and lower inside for magnetic flux when electric current flowed.The magnetic flux and the electromagnetic force of fixing magnet 703, because can produce magnetic force in the vertical direction of coil (not having diagram), think moves in focus direction (upper and lower) direction lens holder 705 and compensates, and must use focus servo operation.

In addition, induce element to describe to the electromagnetic force of picking up driver for the driving light that switches object lens in the present invention below.

Above-mentioned a plurality of object lens 701 and 702, according to the wavelength of the light source that uses, electromagnetic force induces element 708 to be connected with above-mentioned driver fixing support rack 707 can carry out blocked operation.

Above-mentioned electromagnetic force is induced in the element 708 and is comprised, forms a pair of switching magnet 708c, e, supports material 708d, the e of above-mentioned magnet and the conductor 708a of lead 708b coiled.

In addition, induce the operation of element, also comprise the material of controlling power supply (embodiment such as Fig. 9 905) for the control electromagnetic force.Above-mentioned conductor 708a switches between the magnet (708c/708e) at two units and forms.

As mentioned above, the induced material 708 of formation electromagnetic force can constitute in the one or both sides of driver fixing support rack 707.Operate on it explanation below.

Connect the electric power polarity (+/-) of the lead 708b of coiled conductor 708a according to change, can control the acting force that the switching magnet 708c/708e of conductor and the parallel formation of above-mentioned conductor produces.

The front describes for example, and conductor is set under the situation of the N utmost point with the polarity that is connected switching magnet partly, and electric current flows according to time orientation, switches magnet with the left side of conductor and produces suction simultaneously.Under the electric current situation that direction flows between with inverse time, will produce folder power between the switching magnet in conductor and left side.

Driver of the present invention can slide in pedestal.

The relevant accompanying drawing of quoting above-mentioned explanation item below describes.

Fixing support rack (Holde r) 707 for the fixed part that switches object lens 701 and 702 transmission drive unit driver partly is connected the electromagnet that constitutes according to the coil of the spiral unshakable in one's determination of conductor; Corresponding with it both sides are made of the switching magnet of alnico magnets, according to the polarity of electromagnet about produce folder power and repulsion.

At this moment, support driver operation part 705, fixing support rack (Holder) 707 parts and drive 813 parts (as shown in Figure 8) that permanent magnet 703 parts of using also include yoke, referring to Fig. 8, Fig. 8 represents, the switching organigram that driver slides, above-mentioned 813 partly partly install for one in fixing pedestal (Base) 810 with driver 812; Switch in order to carry out lens, the structure that slides in the portion of sliding 811 partly constitutes.

Therefore, the structure that slides is according to the lens switching direction moving linearly of equipment, so owing to take fixed form not change to other direction.

Driver is not owing to variable error occurs after not allowing to adjust, so drive unit has freedom, this is the reason that produces change.So constitute this system certain degree of difficulty is just arranged.

In addition, only carrying out linear running in the present invention is because adopted guide formation between driver and fixed pedestal (Ba se), so can not carry out the change of other direction; The strength of the permanent magnet (switching magnet) that uses when switching according to the magnetic yoke (Yoke) of electromagnet is fixed.

Fig. 9 (a)～(e) expression according to the strength principle between electromagnet 904 and the switching magnet 901,905, is carried out the drive principle explanation synoptic diagram that straight line switches, and also comprises yoke 902,906 among the figure.

At first, the basic electromagnetic force of Fig. 9 (a) expression is induced the element synoptic diagram.

What Fig. 9 (b) represented is that electromagnetic force is induced an example schematic diagram of element operation.Just as shown in the figure, the directional current identical to picture flowed in the other direction to the time, and this moment, the left side of conductor was that N level, right side are the S level; Polarity according to switching permanent magnet will produce repulsion (folder power) in identical polarity one side.Polarity one side each other will produce suction.Show as Fig. 9 (c), move, the driver that is connected with this is moved to the right side of suction.

At this moment, if the situation of cutting off the electricity supply is shown in Fig. 9 (c), yoke (Yoke) effect will appear in the iron core 903 of electromagnet, and a side of pressing close to permanent magnet 901 then continues fixing, before entiredisk, make object lens arrive the position of required optical axis, so just can carry out assigned operation.

In addition, change next disk, if necessity of switching lens is arranged.The situation of this moment is shown in Fig. 9 (d), and the opposite direction supply power according to Fig. 9 (b) direction of current will produce repulsion and suction in mutually opposite direction, to the left direction operation of suction direction; The driver that be connected this moment therewith will transmit and carry out lens and switch shown in Fig. 9 (e).

If above-mentioned blocked operation finishes, the iron core of the back electromagnet of cutting off the electricity supply will produce yoke (Yoke), continue to press close to one side of permanent magnet then; Or before other blocked operation of operation, in fixing object lens position operation driver operation.

As mentioned above, electromagnet carries out driver transmission operation under the state that makes the power supply motion, in the driver operation for reading of data in required driver, there is no need to cut off the electricity supply; Only according to permanent magnet and yoke (Yoke), so under the power supply effect, can produce useful effect because can move fixed function.

Figure 10 represents, a kind of straight line switch drive structure can form driver about (1001,1002) symmetries (as Figure 10 b).In addition, be subjected to the restriction in space or, only have on one side (a) constituting driver element (1001) as Fig. 9, and can be to the organigram that all drives for cost (cost) reduces.

As the above, the present invention is made of several object lens of the vertical direction in disk track; According to the material that electromagnetic force is induced, be that central vertical moves whole drivers with the optical axis, object lens are switched after screening the wavelength that uses in above-mentioned several wavelength.

Those of ordinary skill in the art will be appreciated that, above embodiment is used for illustrating the present invention, and be not to be used as limitation of the invention, as long as in connotation scope of the present invention, all will drop in the scope of claims of the present invention variation, the modification of the above embodiment.

Claims (8)

1. switcher of optical pickup excitor is characterized in that being made of following part:

The lens holder that comprises a plurality of object lens, coil and magnet that the said lens bracing frame is moved, the fixing driver fixing support rack of support member of support said lens bracing frame,

Above-mentioned a plurality of object lens induce element operation corresponding with electromagnetic force, according to the wavelength of the light source that uses, above-mentioned driver fixing support rack with switch after above-mentioned electromagnetic force induces element to be connected,

Above-mentioned a plurality of object lens have constituted a driver on the recording medium vertical direction, are that above-mentioned driver is moved at the center with the optical axis, can move and use the switching of the corresponding object lens of light source,

It is the one or both sides that are used in the driver fixing support rack that above-mentioned electromagnetic force is induced element.

2. switcher of optical pickup excitor as claimed in claim 1 is characterized in that:

Above-mentioned electromagnetic force induces element mainly to comprise the material and the lead wound conductor of magnet, the above-mentioned magnet of support.

3. switcher of optical pickup excitor as claimed in claim 2 is characterized in that:

Induce the operation of element in order to control above-mentioned electromagnetic force, also comprise the material of controlling electric power polarity.

4. switcher of optical pickup excitor as claimed in claim 3 is characterized in that:

The material of above-mentioned control electric power polarity is the electric power polarity that connects the coiled conductor lead according to change, and the acting force of the magnet of parallel formation induces element to control to above-mentioned electromagnetic force between conductor and the above-mentioned conductor.

5. switcher of optical pickup excitor as claimed in claim 4 is characterized in that:

Above-mentioned conductor be connected partly magnet under the situation that is set at the N utmost point, electric current will flow from left to right with time orientation, will produce suction with the magnet in conductor left side.

6. switcher of optical pickup excitor as claimed in claim 4 is characterized in that:

Above-mentioned conductor be connected partly magnet under the situation that is set at the S utmost point, electric current flows to the opposite direction of time, the magnet in conductor and left side will produce the effect of folder power.

7. as claim 5 or 6 described switcher of optical pickup excitor, it is characterized in that:

Described conductor and magnet produce suction and make the lens holder that comprises a plurality of object lens and the driver that comprises the driver fixing support rack that the said lens bracing frame is connected, and slide in pedestal.

8. switcher of optical pickup excitor as claimed in claim 2 is characterized in that:

Above-mentioned magnet is a pair of.

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