CN201549222U - Optical pickup core - Google Patents

Abstract

The utility model relates to an optical pickup core for reading CDs of two formats. A spindle motor is located in the center of a bottom plate; and the optical pickup core comprises a first optical pickup drive part and a second optical pickup drive part which are located below the bottom plate and respectively arranged on the left side and the right side of the spindle motor. The optical pickup core has compact structure, and can be used for playing CDs of two different formats.

Description

A kind of optical pickup unit core

Technical field

The utility model relates to a kind of parts of disk loading device.

Background technology

It is that the red laser of 650nm reads or write data that traditional DVD needs shaven head send wavelength.Blu-ray Disc (Blu-ray Disc) is abbreviated as BD, and it utilizes wavelength to read and write data for the short blue laser of 405nm.As a rule the short more laser of wavelength can write down or read more information on unit area, and therefore, the blue light the earth has improved the memory capacity of CD, has caused the qualitative leap of optical storage product.

The high-resolution disc of China CBHD (Chinese blue light high-resolution disc) by name is the blue light beam laser disc product of another kind of digital light saving format, its used CD is similar to BD, all are optical digital storing medias of common CD size, use the blue light of 405 nano wave lengths equally.Difference is that CBHD only needs to transform a little just can produce, and can maximally utilise existing industry basis on DVD production line basis, cost is lower.Nowadays, China is domestic is the situation of CBHD and BD coexistence.

Because CBHD and BD are incompatible.At present, still there is not both can play the disk player that CBHD also can play BD.

The utility model content

The purpose of this utility model provides a kind of compact conformation, can be used to play the optical pickup unit core of the CD of two kinds of different systems.

The technical scheme that realizes the utility model purpose is: a kind of optical pickup unit core of the present utility model comprises base, spindle motor, turntable assembly and slider block; Base comprises base plate and antivibration pad Connection Block; The turntable of turntable assembly is fixed on the upper end of motor shaft of spindle motor; Each slider block is separately fixed on the base plate, and is positioned at the below of base plate;

Optical pickup unit core also comprises first optical pick-up device driving parts and second optical pick-up device driving parts that all is arranged on the base plate and is positioned at floor below;

Have CD on the base plate and read the hole; The spindle motor of spindle motor assembly is fixed on the base plate by its motor casing, perhaps be fixedly connected on the plate body that is fixed in the motor mounting plate on the base plate, and spindle motor is positioned at the central part of base plate;

First optical pick-up device driving parts comprises that first light picker, the first main slide bar, the first secondary slide bar, the first slide bar installation component and first slide gear train; First optical pick-up device driving parts is positioned at the left side of spindle motor, and its first light picker reads the hole from the CD of base plate and upwards exposes; The two ends of the first main slide bar and the first secondary slide bar are separately positioned in the corresponding slider block, and the first main slide bar and the first secondary slide bar are positioned on the base plate by the first slide bar installation component elasticity; First slides gear train is arranged on the base plate from the below, and is positioned at the rear of the first main slide bar; First light picker horizontally slips with the first secondary slide bar with the first main slide bar and is connected; The power output that the power input component of first light picker and first slides gear train is connected movingly;

Second group of optical pick-up device driving parts comprises that second light picker, the second main slide bar, the second secondary slide bar, the second slide bar installation component and second slide gear train; Second group of optical pick-up device driving parts is positioned at the right side of spindle motor, and its second light picker reads the hole from the CD of base plate and upwards exposes; The two ends of the second main slide bar and the second secondary slide bar are separately positioned in the slider block, and the second main slide bar and the second secondary slide bar are positioned on the base plate by the second slide bar installation component elasticity; Second slides gear train is arranged on the base plate from the below, and is positioned at the place ahead of the second main slide bar; Second light picker horizontally slips with the second secondary slide bar with the second main slide bar and is connected; The power output that the power input component of second light picker and second slides gear train is connected movingly.

The spindle motor of above-mentioned spindle motor assembly is a brushless electric machine; Spindle motor is fixedly connected on the plate body that is fixed in the motor mounting plate on the base plate by its motor casing; CD on the base plate reads Kong Weiyi strip medium pore;

Spindle motor assembly also comprises 3 to 4 motor mounting plate joint pins; Motor mounting plate is fixed on the base plate from the below by each motor mounting plate joint pin, and motor mounting plate strides across the medium pore of the strip of base on fore-and-aft direction; Spindle motor is fixed on the motor mounting plate by its bottom, and is positioned at the top center position of motor mounting plate; The motor shaft of spindle motor passes the strip medium pore of base plate.

Above-mentioned slider block has 6, is divided into slider block in the left slider block in back, the back, the right slider block in back, preceding left slider block, preceding middle slider block and preceding right slider block according to the position that distributes; Each slider block is equipped with the compression spring hole that axis normal is provided with; Back left slider block and preceding left slider block are equipped with that Open Side Down and slide bar chamber to the right; Back right slider block and preceding right slider block are equipped with that Open Side Down and slide bar chamber left; Slider block is provided with that Open Side Down and slide bar chamber to the right in the back, and the front middle part slider block is provided with that Open Side Down and slide bar chamber left;

The first slide bar installation component comprise the first main slide bar vertically to stage clip, the left flap in back, 3 adjust screw, the first main slide bar level in stage clip, back seat board, stop screw, 2 first secondary slide bar stage clips, preceding left flap, preceding in flap; The first main slide bar, the first secondary slide bar and the first slide bar installation component have together constituted first group of slide bar assembly;

The first main slide bar vertically is arranged in the compression spring hole of the left slider block in back to stage clip, and its upper end contacts with the lower surface of base plate; The left end of the first main slide bar stretches in the slide bar chamber of the left slider block in back, and contacts with the vertical lower end to stage clip of the first main slide bar of top; By screw the left flap in back is fixed on the left slider block in back from the below, and one adjusted screw and screw from bottom to top on the left flap in back, and withstand on from bottom to top on the first main slide bar by its tail end; Seat board is fixed on from the below the back on the slider block by screw in the back, and is arranged in the front end of back slider block; The upside of the right-hand member head of the first main slide bar contacts with the lower surface of seat board in the back, the first main slide bar level is on the direction stage clip post forward of rear sleeve slider block in the back of stage clip, its rear end contacts with slider block in the back, the first main slide bar level withstands on the right-hand member head rear side of the first main slide bar to the front end of stage clip, stop screw screws in the back on the seat board from bottom to top, and carries out spacing by the rear side of its double-screw bolt and the frustum cone side of head to the downside and the front side of the right-hand member head of the first main slide bar;

2 first secondary slide bar stage clips are vertical respectively to being arranged on before in the corresponding compression spring hole of left slider block and preceding middle slider block, and their upper ends separately contact with the lower surface of base plate; Before the left end of the first secondary slide bar stretches in the slide bar chamber of left slider block, and contact with the lower end of the first secondary slide bar stage clip of top; Before by screw preceding left flap being fixed on from the below on the left slider block, and one adjusted screw and screw from bottom to top on preceding left flap, and withstood on from bottom to top on the first secondary slide bar by its tail end; In before the right-hand member of the first secondary slide bar stretches in the slide bar chamber of slider block, and contact with the lower end of the first secondary slide bar stage clip of top; With on the slider block flap in preceding is before the below is fixed on, and adjustment screw screws in preceding on the flap from bottom to top by screw, and withstood on from bottom to top on the first secondary slide bar by its tail end;

The second slide bar installation component comprise the second main slide bar vertically to stage clip, preceding right flap, 3 adjust screw, the second main slide bar level to stage clip, preceding in seat board, stop screw, 2 second secondary slide bar stage clips, the right flap in back, back in flap; The second main slide bar, the second secondary slide bar and the second slide bar installation component have together constituted second group of slide bar assembly;

The second main slide bar vertically in the compression spring hole of right slider block, contacts with the lower surface of base plate on it before stage clip is arranged on; The right-hand member of the second main slide bar stretches in the slide bar chamber of preceding right slider block, and contacts with the vertical lower end to stage clip of the second main slide bar of top; Before by screw preceding right flap being fixed on from the below on the right slider block, and one adjusted screw and screw from bottom to top on preceding right flap, and withstood on from bottom to top on the second main slide bar by its tail end; Before in seat board by screw is before the below is fixed on the slider block, and be arranged in the front end of preceding slider block; The upside of the left end head of the second main slide bar contacts with the lower surface of preceding middle seat board, on the direction stage clip post backward of the second main slide bar level middle slider block before the front portion of stage clip is enclosed within, its front end contacts with preceding middle slider block, the second main slide bar level withstands on the left end head front side of the second main slide bar to the rear end of stage clip, seat board screws in preceding on the slider block in before stop screw passes from bottom to top, and carries out spacing by the frustum cone side of the front side of its double-screw bolt and head to the downside and the rear side of the left end head of the second main slide bar;

Vertically in being arranged on right slider block in back and back in the corresponding compression spring hole of slider block, their upper ends separately contact with the lower surface of base plate respectively for 2 second secondary slide bar stage clips; The right-hand member of the second secondary slide bar stretches in the slide bar chamber of the right slider block in back, and contacts with the lower end of the second secondary slide bar stage clip of top; By screw the right flap in back is fixed on the right slider block in back from the below, and one adjusted screw and screw from bottom to top on preceding left flap, and withstand on from bottom to top on the second secondary slide bar by its tail end; The left end of the second secondary slide bar stretches in the back in the slide bar chamber of slider block, and contacts with the lower end of the second secondary slide bar stage clip of top; By screw will the back in flap be fixed on from the below the back on the slider block, and one adjusted screw and screw from bottom to top in the back on the flap, and withstood on from bottom to top on the second secondary slide bar by its tail end.

Above-mentioned first slides gear train comprises first stepper motor, first screw mandrel, first motor mount and first flexible printed circuit board; First screw mandrel is the first power output that slides gear train, also is the motor shaft of first stepper motor, and first stepper motor is fixed on first motor mount by its motor casing, and the right-hand member head of first screw mandrel and first motor mount are rotationally connected; The control signal output ends of first flexible printed circuit board is electrically connected with the control end of first stepper motor; By screw first motor mount is fixed on the base plate from the below, and is positioned at the rear of the first main slide bar;

Above-mentioned second slides gear train comprises second stepper motor, second screw mandrel, second motor mount and second flexible printed circuit board; Second screw mandrel is the second power output that slides gear train, also is the motor shaft of second stepper motor, and second stepper motor is fixed on second motor mount by its motor casing, and the right-hand member head of second screw mandrel and second motor mount are rotationally connected; The control signal output ends of second flexible printed circuit board is electrically connected with the second Stepping Motor Control end; By screw second motor mount is fixed on the base plate from the below, and is positioned at the rear of the second main slide bar.

The light picker of above-mentioned first light picker for matching with a kind of CD of standard and using, the light picker of second light picker for matching and use with the CD of another kind of standard;

First light picker comprises light picker main body, back linking arm, preceding linking arm, first feed screw nut and the first buffering stage clip; The shell of back linking arm and preceding linking arm and light picker main body is connected as a single entity, and the back linking arm is positioned at the rear side of light picker main body, and preceding linking arm is positioned at the front side of light picker main body; The direction of the optical lens of light picker main body upwards; The back linking arm of first light picker is enclosed within on the first main slide bar, and horizontally slips with the first main slide bar and to be connected; The preceding linking arm of first light picker is contacted with the first secondary slide bar by following three directions in last back, and is stuck on the first secondary slide bar; First feed screw nut is the power input component of first light picker, first feed screw nut comprises mount pad and is connected the opening deckle board spare up of mount pad back side top, the rear end face of the back side panel of deckle board spare is provided with thread, and first feed screw nut is meshed with first screw mandrel at rear by its thread; First feed screw nut's mount pad from upper fixed the back linking arm on; The first buffering stage clip is arranged between first feed screw nut's the front side deckle board and back side panel of deckle board spare;

Second light picker comprises light picker main body, preceding linking arm, back linking arm, second feed screw nut and the second buffering stage clip; Before the shell of linking arm and back linking arm and light picker main body be connected as a single entity, and preceding linking arm is positioned at the front side of light picker main body, back linking arm is positioned at the rear side of light picker main body; The direction of the optical lens of light picker main body upwards; The preceding linking arm of second light picker is enclosed within on the second main slide bar, and horizontally slips with the second main slide bar and to be connected; The back linking arm of second light picker is contacted with the second secondary slide bar by following three directions of going forward, and is stuck on the second secondary slide bar; Second feed screw nut is the power input component of second light picker, second feed screw nut comprises mount pad and is connected the opening deckle board spare up of top, mount pad front side, the front end face of the front side board of the deckle board of deckle board spare is provided with thread, and second feed screw nut is meshed with second screw mandrel in the place ahead by its thread; Second feed screw nut's mount pad from upper fixed on preceding linking arm; The second buffering stage clip is arranged between second feed screw nut's the rear side deckle board and front side board of deckle board spare.

Above-mentioned first light picker also comprises first contact; Second light picker also comprises the second wafer; Spindle motor assembly also comprises first switch and second switch;

First contact from upper fixed on first feed screw nut's front side frame; The second wafer from upper fixed on second feed screw nut's rear frame;

First switch is fixed on the motor mounting plate, and is positioned at the left back position, top of motor mounting plate, and switch contact stretches out left; Second switch is fixed on the motor mounting plate, and is positioned at the right front position, top of motor mounting plate, and switch contact stretches out to the right.

The utlity model has positive effect: (1) the utility model is provided with two light pickers, can be used in the corresponding suction type disk loading device, makes this suction type disk loading device can play the CD of two kinds of different systems.(2) each optical pick-up device driving parts of optical pickup unit core of the present utility model is when carrying out Installation and Debugging, can regulate three in its slide bar installation component separately adjustment screws and a stop screw, this regulative mode can be regulated the movement locus face inclination angle of light picker shaven head, can accurately locate to the distance between the information faces of CD the movement locus face of light picker again, can also regulate the centre distance at light picker shaven head and turntable center in addition, improve to a great extent and read to coil performance.(3) spindle motor of the present utility model is fixed on the base plate by motor post and motor mounting plate, and compact conformation, fixed installation are conveniently; Spindle motor adopt brushless electric machine not only serviceable life longer, and help reading because of stability of rotation to CD.(4) motor that slides that slides gear train of the present utility model adopts stepper motor, can the mobile distance of more accurate control light picker shaven head.(5) the buffering stage clip that is arranged in the feed screw nut of light picker of the present utility model can make feed screw nut and the screw mandrel that slides gear train better mesh, and has improved the reliability of work.

Description of drawings

Fig. 1 is the perspective view of the optical pickup unit core of the utility model embodiment 1.

Fig. 2 is the spindle motor assembly among Fig. 1 and the perspective exploded view of turntable assembly.

Fig. 3 removes inverted perspective view behind spindle motor assembly and the turntable assembly for Fig. 2.

Fig. 4 is the light picker among Fig. 3 and the perspective exploded view of light picker slide bar assembly.

Fig. 5 is the perspective exploded view that first light picker among Fig. 4 is observed from the rear.

Fig. 6 is that second light picker among Fig. 4 is from the perspective exploded view of forward observation.

Fig. 7 removes perspective exploded view behind light picker and the light picker slide bar assembly for Fig. 4.

Mark in the above-mentioned accompanying drawing is as follows:

Base 50, base plate 50-1, antivibration pad Connection Block 50-2, left bracket plate 50-3, right axle seat plate 50-4 stops post 50-5, and a left side stops post 50-5-1, and the right side stops post 50-5-2, strip medium pore 50-6,

Spindle motor assembly 51, spindle motor 51-1, motor printed circuit board (PCB) 51-1-1, motor mounting plate joint pin 51-2, motor mounting plate 51-3, the first switch 51-4, second switch 51-5,

Turntable assembly 52, turntable 52-1, annular magnet steel 52-2,

Slider block 53, the left slider block 53-1 in back, slider block 53-2 in the back, the right slider block 53-3 in back, preceding left slider block 53-4, preceding middle slider block 53-5, preceding right slider block 53-6,

First light picker 54, light picker main body 54-1, back linking arm 54-2, preceding linking arm 54-3, the first feed screw nut 54-4, mount pad 54-4-1, deckle board spare 54-4-2, thread 54-4-3, the first buffering stage clip 54-5, the first contact 54-6,

First group of slide bar assembly 55, the first main slide bar 55-1, the first main slide bar is vertically to stage clip 55-2, the left flap 55-3 in back, adjust screw 55-4, the first main slide bar level is to stage clip 55-5, seat board 55-6 in the back, stop screw 55-7, the first secondary slide bar 55-8, the first secondary slide bar stage clip 55-9, preceding left flap 55-10, flap 55-11 in preceding

First slides gear train 56, the first stepper motor 56-1, the first screw mandrel 56-2, and the first motor mount 56-3, the first flexible printed circuit board 56-4,

Second light picker 57, light picker main body 57-1, preceding linking arm 57-2, back linking arm 57-3, the second feed screw nut 57-4, mount pad 57-4-1, deckle board spare 57-4-2, thread 57-4-3, the second buffering stage clip 57-5, the second wafer 57-6,

Second group of slide bar assembly 58, the second main slide bar 58-1, the second main slide bar is vertically to stage clip 58-2, preceding right flap 58-3, adjust screw 58-4, the second main slide bar level is to stage clip 58-5, preceding in seat board 58-6, stop screw 58-7, the second secondary slide bar 58-8, the second secondary slide bar stage clip 58-9, the right flap 58-10 in back, flap 58-11 in the back

Second slides gear train 59, the second stepper motor 59-1, the second screw mandrel 59-2, and the second motor mount 59-3, the second flexible printed circuit board 59-4,

Embodiment

(embodiment 1)

See Fig. 2 to Fig. 7, the optical pickup unit core 5 of present embodiment comprises base 50, spindle motor assembly 51, turntable assembly 52,6 slider blocks 53, first optical pick-up device driving parts and second optical pick-up device driving parts.

See Fig. 1, base 50 is a steel integrated punching spare, comprises base plate 50-1 and 6 antivibration pad Connection Block 50-2.

Base plate 50-1 global shape is a rectangle, and downward flanging is arranged all around, and central authorities have the strip medium pore 50-6 that reads the hole as CD.

6 antivibration pad Connection Block 50-2 are divided into two groups, and 3 every group, first group of antivibration pad Connection Block equidistantly is connected on the preceding side edgefold of base plate 50-1, and lay respectively at front side left part, middle part, front side and the front side right part of base plate 50-1; Second group of antivibration pad Connection Block equidistantly is connected on the back side edgefold of base plate 50-1, and is positioned at rear side left part, rear side middle part and the rear side right part of base plate 50-1.

See Fig. 4 and Fig. 7, each slider block 53 all has the compression spring hole that axis normal is provided with, and slider block 53 on base plate 50-1, and is positioned at the below of base plate 50-1 by screw retention.6 slider blocks 53 are divided into slider block 53-2 in the left slider block 53-1 in back, the back, back right slider block 53-3, preceding left slider block 53-4, preceding middle slider block 53-5 and preceding right slider block 53-6 according to the position that distributes.Back left slider block 53-1 and preceding left slider block 53-4 are equipped with that Open Side Down and slide bar chamber to the right.Back right slider block 53-3 and preceding right slider block 53-6 are equipped with that Open Side Down and slide bar chamber left.Slider block 53-2 is provided with that Open Side Down and slide bar chamber to the right in the back, and front middle part slider block 53-5 is provided with that Open Side Down and slide bar chamber left.

See Fig. 3, first optical pick-up device driving parts comprises that first light picker 54, the first slide bar assembly 55 and first slide gear train 56.

See Fig. 4 and Fig. 7, the first slide bar assembly 55 comprise the first main slide bar 55-1, the first main slide bar vertically to stage clip 55-2, the left flap 55-3 in back, 3 adjust screw 55-4, the first main slide bar level in stage clip 55-5, back seat board 55-6, stop screw 55-7, the first secondary slide bar 55-8,2 the first secondary slide bar stage clip 55-9, preceding left flap 55-10, preceding in flap 55-11.

The first main slide bar vertically is arranged in the compression spring hole of the left slider block 53-1 in back to stage clip 55-2, its upper end contact with the lower surface of base plate 50-1 (Fig. 6); The left end of the first main slide bar 55-1 stretches in the slide bar chamber of the left slider block 53-1 in back, and contacts with the vertical lower end to stage clip 55-2 of the first main slide bar of top.By screw the left flap 55-3 in back is fixed on the left slider block 53-1 in back from the below, and adjusting screw 55-4 for one screws from bottom to top on the left flap 55-3 in back, and withstand on from bottom to top on the first main slide bar 55-1 by its tail end, thereby the left end head that makes the main slide bar 55-1 that wins is the masterpiece time spent outside, can be with respect to base 50 elastic movements (Fig. 4) on above-below direction.Seat board 55-6 is fixed on from the below the back on the slider block 53-2 by screw in the back, and is arranged in the front end (Fig. 7) of back slider block 53-2.

See Fig. 4 and Fig. 7, the upside of the right-hand member head of the first main slide bar 55-1 contacts with the lower surface of seat board 55-6 in the back, the first main slide bar level is on the direction stage clip post forward of rear sleeve slider block 53-2 in the back of stage clip 55-5, its rear end contacts with slider block 53-2 in the back, the first main slide bar level withstands on the right-hand member head rear side of the first main slide bar 55-1 to the front end of stage clip 55-5, stop screw 55-7 screws in the back on the seat board 55-6 from bottom to top, and carry out spacing to the downside and the front side of the right-hand member head of the first main slide bar 55-1 by the rear side of its double-screw bolt and the frustum cone side of head, thereby the right-hand member head that makes the main slide bar 55-1 that wins is the masterpiece time spent outside, can be in the horizontal direction before and after elastic movement.

Still see Fig. 4 and Fig. 7,2 first secondary slide bar stage clip 55-9 are vertical respectively to being arranged on before in the corresponding compression spring hole of left slider block 53-4 and preceding middle slider block 53-5, and their upper ends separately contact with the lower surface of base plate 50-1.Before the left end of the first secondary slide bar 55-8 stretches in the slide bar chamber of left slider block 53-4, and contact with the lower end of the first secondary slide bar stage clip 55-9 of top.By screw preceding left flap 55-10 is fixed on the preceding left slider block 53-4 from the below, and adjusting screw 55-4 for one screws from bottom to top on preceding left flap 55-10, and withstand on from bottom to top on the first secondary slide bar 55-8 by its tail end, thereby the left end head that makes the secondary slide bar 55-8 that wins is the masterpiece time spent outside, can be with respect to base 50 elastic movements on above-below direction.In before the right-hand member of the first secondary slide bar 55-8 stretches in the slide bar chamber of slider block 53-5, and contact with the lower end of the first secondary slide bar stage clip 55-9 of top.By screw with on the slider block 53-5 flap 55-11 in preceding is before the below is fixed on, and adjusting screw 55-4 for one screws in preceding on the flap 55-11 from bottom to top, and withstand on from bottom to top on the first secondary slide bar 55-8 by its tail end, thereby the right-hand member head that makes the secondary slide bar 55-8 that wins is the masterpiece time spent outside, can be with respect to base 50 elastic movements on above-below direction.

See Fig. 7, first slides gear train 56 comprises the first stepper motor 56-1, the first screw mandrel 56-2, the first motor mount 56-3 and the first flexible printed circuit board 56-4.The first screw mandrel 56-2 also is the motor shaft of the first stepper motor 56-1, and the first stepper motor 56-1 is fixed on the first motor mount 56-3 by its motor casing, and the right-hand member head of the first screw mandrel 56-2 and the first motor mount 56-3 are rotationally connected; The control signal output ends of the first flexible printed circuit board 56-4 is electrically connected with the control end of the first stepper motor 56-1.By screw the first motor mount 56-3 is fixed on the base plate 50-1 from the below, and is positioned at the rear of the first main slide bar 55-1.

See Fig. 5, the light picker of first light picker 54 for matching with the CD of blue light (BD) standard and using comprises light picker main body 54-1, back linking arm 54-2, preceding linking arm 54-3, the first feed screw nut 54-4, the first buffering stage clip 54-5 and the first contact 54-6.The shell of back linking arm 54-2 and preceding linking arm 54-3 and light picker main body 54-1 is connected as a single entity, and back linking arm 54-2 is positioned at the rear side of light picker main body 54-1, and preceding linking arm 54-3 is positioned at the front side of light picker main body 54-1.Being directed upwardly of the optical lens of light picker main body 54-1.The back linking arm 54-2 of first light picker 54 is enclosed within on the first main slide bar 55-1, and horizontally slips with the first main slide bar 55-1 and to be connected; The preceding linking arm 54-3 of first light picker 54 is contacted with the first secondary slide bar 55-8 by following three directions in last back, and is stuck on the first secondary slide bar 55-8, thereby can horizontally slip with respect to the first secondary slide bar 55-8.

The first feed screw nut 54-4 is the integrated through injection molding part, comprises mount pad 54-4-1 and the opening deckle board spare 54-4-2 up that is connected mount pad 54-4-1 back side top, and the rear end face of the back side panel of deckle board spare 54-4-2 is provided with thread 54-4-3; Mount pad 54-4-1 with the first feed screw nut 54-4 is fixed on the linking arm 54-2 of back from the below by screw; The first feed screw nut 54-4 is meshed with the first screw mandrel 56-2 at rear by its thread 54-4-3.The first buffering stage clip 54-5 is arranged between the front side board and back side panel of deckle board spare 54-4-2 of the first feed screw nut 54-4.The first contact 54-6 is a rotary corner plate, from bottom to top the first contact 54-6 is fixed on the mount pad 54-4-1 of the first feed screw nut 54-4 by screw.

See Fig. 3, second optical pick-up device driving parts comprises that second light picker 57, second group of slide bar assembly 58 and second slide gear train 59.

See Fig. 4 and Fig. 7, the second slide bar assembly 58 comprise the second main slide bar 58-1, the second main slide bar vertically to stage clip 58-2, preceding right flap 58-3,3 adjust screw 58-4, the second main slide bar level to stage clip 58-5, preceding in seat board 58-6, stop screw 58-7, the second secondary slide bar 58-8,2 the second secondary slide bar stage clip 58-9, the right flap 58-10 in back, back in flap 58-11.

The second main slide bar vertically before stage clip 58-2 is arranged in the compression spring hole of right slider block 53-6, its upper end contact with the lower surface of base plate 50-1 (Fig. 7); The right-hand member of the second main slide bar 58-1 stretches in the slide bar chamber of preceding right slider block 53-6, and contacts with the vertical lower end to stage clip 58-2 of the second main slide bar of top.By screw preceding right flap 58-3 is fixed on the preceding right slider block 53-6 from the below, and adjusting screw 58-4 for one screws from bottom to top on preceding right flap 58-3, and withstand on from bottom to top on the second main slide bar 58-1 by its tail end, thereby make right-hand member head masterpiece time spent outside of the second main slide bar 58-1, can be with respect to base 50 elastic movements (Fig. 4) on above-below direction.Before in seat board 58-6 by screw is before the below is fixed on the slider block 53-5, and be arranged in the rear end (Fig. 7) of preceding slider block 53-5.

See Fig. 4 and Fig. 7, the upside of the left end head of the second main slide bar 58-1 contacts with the lower surface of preceding middle seat board 58-6, on the direction stage clip post backward of the second main slide bar level middle slider block 53-5 before the front portion of stage clip 58-5 is enclosed within, its front end contacts with preceding middle slider block 53-5, the second main slide bar level withstands on the left end head front side of the second main slide bar 58-1 to the rear end of stage clip 58-5, stop screw 58-7 screws in preceding on the seat board 58-6 from bottom to top, and carry out spacing to the downside and the rear side of the left end head of the second main slide bar 58-1 by the frustum cone side of the front side of its double-screw bolt and head, thereby make left end head masterpiece time spent outside of the second main slide bar 58-1, can be in the horizontal direction before and after elastic movement.

Still see Fig. 4 and Fig. 7, vertically in being arranged on right slider block 53-3 in back and back in the corresponding compression spring hole of slider block 53-2, their upper ends separately contact with the lower surface of base plate 50-1 respectively for 2 second secondary slide bar stage clip 58-9.The right-hand member of the second secondary slide bar 58-8 stretches in the slide bar chamber of the right slider block 53-3 in back, and contacts with the lower end of the second secondary slide bar stage clip 58-9 of top.By screw the right flap 58-10 in back is fixed on the right slider block 53-3 in back from the below, and adjusting screw 58-4 for one screws from bottom to top on the right flap 58-10 in back, and withstand on from bottom to top on the second secondary slide bar 58-8 by its tail end, thereby make right-hand member head masterpiece time spent outside of the second secondary slide bar 58-8, can be with respect to base 50 elastic movements on above-below direction.The left end of the second secondary slide bar 58-8 stretches in the back in the slide bar chamber of slider block 53-2, and contacts with the lower end of the second secondary slide bar stage clip 58-9 of top.On slider block 53-2 flap 58-11 in the screw general back is after the below is fixed on, and adjusting screw 58-4 for one screws in the back on the flap 58-11 from bottom to top, and withstand on from bottom to top on the second secondary slide bar 58-8 by its tail end, thereby make left end head masterpiece time spent outside of the second secondary slide bar 58-8, can be with respect to base 50 elastic movements on above-below direction.

See Fig. 7, second slides gear train 59 comprises the second stepper motor 59-1, the second screw mandrel 59-2, the second motor mount 59-3 and the second flexible printed circuit board 59-4.The second screw mandrel 59-2 also is the motor shaft of the second stepper motor 59-1, and the second stepper motor 59-1 is fixed on the second motor mount 59-3 by its motor casing, and the right-hand member head of the second screw mandrel 59-2 and the second motor mount 59-3 are rotationally connected; The control signal output ends of the second flexible printed circuit board 59-4 is electrically connected with the control end of the second stepper motor 59-1.By screw the second motor mount 59-3 is fixed on the base plate 50-1 from the below, and is positioned at the place ahead of the second main slide bar 58-1.

See Fig. 6, the light picker of second light picker 57 for matching with the CD of Chinese blue light (CHBD) standard and using comprises light picker main body 57-1, preceding linking arm 57-2, back linking arm 57-3, the second feed screw nut 57-4, second buffering stage clip 57-5 and the second wafer 57-6.Before the shell of linking arm 57-2 and back linking arm 57-3 and light picker main body 57-1 be connected as a single entity, and preceding linking arm 57-2 is positioned at the front side of light picker main body 57-1, back linking arm 57-3 be positioned at light picker main body 57-1 rear side.Being directed upwardly of the optical lens of light picker main body 57-1.The preceding linking arm 57-2 of second light picker 57 is enclosed within on the second main slide bar 58-1, and horizontally slips with the second main slide bar 58-1 and to be connected; The back linking arm 57-3 of second light picker 57 is contacted with the second secondary slide bar 58-8 by following three directions of going forward, and is stuck on the second secondary slide bar 58-8, thereby can horizontally slip with respect to the second secondary slide bar 58-8.

The second feed screw nut 57-4 is the integrated through injection molding part, comprises mount pad 57-4-1 and the opening deckle board spare 57-4-2 up that is connected top, mount pad 57-4-1 front side, and the front end face of the front side board of deckle board spare 57-4-2 is provided with thread 57-4-3; Mount pad 57-4-1 with the second feed screw nut 57-4 is fixed on the preceding linking arm 57-2 from the below by screw; The second feed screw nut 57-4 is meshed with the second screw mandrel 59-2 in the place ahead by its thread 57-4-3.The second buffering stage clip 57-5 is arranged between the back side panel and front side board of deckle board spare 57-4-2 of the second feed screw nut 57-4.The second wafer 57-6 is a rotary corner plate, the second wafer 57-6 is fixed on the mount pad 57-4-1 of the second feed screw nut 57-4 from bottom to top by screw.

See Fig. 2, spindle motor assembly 51 comprises spindle motor 51-1,4 motor mounting plate joint pin 51-2, motor mounting plate 51-3, the first switch 51-4 and second switch 51-5.

4 motor mounting plate joint pin 51-2 by separately upper end riveted and fixed on base plate 50-1.Pass the connecting hole on four angles that are opened in motor mounting plate 51-3 by 4 screws after, screw respectively on the screw of the lower end of corresponding 4 motor mounting plate joint pin 51-2, and make motor mounting plate 51-3 be fixed on the base plate 50-1 from the below by motor mounting plate joint pin 51-2, and motor mounting plate 51-3 strides across the strip medium pore 50-6 of base 50 on fore-and-aft direction.Spindle motor 51-1 is a brushless electric machine.Spindle motor 51-1 is fixed on the motor mounting plate 51-3 by its bottom, and is positioned at the top center position of motor mounting plate 51-3.The motor shaft of spindle motor 51-1 passes the strip medium pore 50-6 of base plate 50-1.

The control signal output ends of motor printed circuit board (PCB) 51-1-1 is electrically connected with the control end of spindle motor 51-1.The first switch 51-4 is fixed on the motor mounting plate 51-3, and is positioned at the left back position, top of motor mounting plate 51-3, and it is relative with the first contact 54-6 of first light picker 54 that switch contact stretches out left.Second switch 51-5 is fixed on the motor mounting plate 51-3, and is positioned at the right front position, top of motor mounting plate 51-3, and it is relative with the second wafer 57-6 of second light picker 57 that switch contact stretches out to the right.

Turntable assembly 52 comprises turntable 52-1 and annular magnet steel 52-2.Turntable 52-1 is the integrated through injection molding part, has annular groove in the top, is provided with connecting hole in the central; The material of annular magnet steel 52-2 is a permanent magnet, and annular magnet steel 52-2 is tightly fixed in the annular groove of turntable 52-1.

Turntable 52-1 is enclosed within by its connecting hole wringing fit on the upper end of motor shaft of spindle motor 51-1.

For explain convenient for the purpose of, in the present embodiment to the description of the orientation, position of each parts and mutual relationship according to carrying out under the base 50 horizontal positioned states.When the optical pickup unit core of present embodiment is used, be installed on the mount pad by shockproof web member, its base 50 both can carry out horizontal positioned according to the mode of foregoing description to be used, and also can use under the vertical laying state, or use under the inclination laying state.

When the optical pickup unit core of present embodiment is used, CD is after entering disk loading device inside from the place ahead, it is clamped with the turntable 52-1 that is positioned at the below by the platen that is positioned at the top, control circuit is under programmed control, after controlling the song table information that in 2 light pickers one reads CD, discern the form of the information of its imprinting again by control circuit, and decision is read by wherein a corresponding light picker, subsequently control circuit by sliding gear train accordingly this light picker being driven and with respect to base about 50 to motion, again about in motion, the CD that rotates is carried out reading of information.

(embodiment 2)

The remainder of the optical pickup unit core of present embodiment is identical with embodiment 1, and difference is: link to each other before and after the middle part of base plate 50-1, the strip medium pore 50-6 on the base plate 50-1 is divided into 2, lays respectively at left side and the right side of base plate 50-1.The spindle motor 51-1 of spindle motor assembly 51 is fixed on base plate 50-1 central authorities by its motor casing.

Claims (6)

1. an optical pickup unit core comprises base (50), spindle motor (51-1), turntable assembly (52) and slider block (53); Base (50) comprises base plate (50-1) and antivibration pad Connection Block (50-2); The turntable (52-1) of turntable assembly (52) is fixed on the upper end of motor shaft of spindle motor (51-1); Each slider block (53) is separately fixed on the base plate (50-1), and is positioned at the below of base plate (50-1); It is characterized in that:

Optical pickup unit core (5) also comprises first optical pick-up device driving parts and second optical pick-up device driving parts that all is arranged on the base plate (50-1) and is positioned at base plate (50-1) below;

Have CD on the base plate (50-1) and read the hole; The spindle motor (51-1) of spindle motor assembly (51) is fixed on the base plate (50-1) by its motor casing, perhaps be fixedly connected on the plate body of the motor mounting plate (51-3) that is fixed on the base plate (50-1), and spindle motor (51-1) is positioned at the central part of base plate (50-1);

First optical pick-up device driving parts comprises that first light picker (54), the first main slide bar (55-1), the first secondary slide bar (55-8), the first slide bar installation component and first slide gear train (56); First optical pick-up device driving parts is positioned at the left side of spindle motor (51-1), and its first light picker (54) reads the hole from the CD of base plate (50-1) and upwards exposes; The two ends of the first main slide bar (55-1) and the first secondary slide bar (55-8) are separately positioned in the corresponding slider block (53), and the first main slide bar (55-1) and the first secondary slide bar (55-8) are positioned on the base plate (50-1) by the first slide bar installation component elasticity; First slides gear train (56) is arranged on the base plate (50-1) from the below, and is positioned at the rear of the first main slide bar (55-1); First light picker (54) horizontally slips with the first secondary slide bar (55-8) with the first main slide bar (55-1) and is connected; The power output that the power input component of first light picker (54) and first slides gear train (56) is connected movingly;

Second group of optical pick-up device driving parts comprises that second light picker (57), the second main slide bar (58-1), the second secondary slide bar (58-8), the second slide bar installation component and second slide gear train (59); Second group of optical pick-up device driving parts is positioned at the right side of spindle motor (51-1), and its second light picker (57) reads the hole from the CD of base plate (50-1) and upwards exposes; The two ends of the second main slide bar (58-1) and the second secondary slide bar (58-8) are separately positioned in the slider block (53), and the second main slide bar (58-1) and the second secondary slide bar (58-8) are positioned on the base plate (50-1) by the second slide bar installation component elasticity; Second slides gear train (59) is arranged on the base plate (50-1) from the below, and is positioned at the place ahead of the second main slide bar (58-1); Second light picker (57) horizontally slips with the second secondary slide bar (58-8) with the second main slide bar (58-1) and is connected; The power output that the power input component of second light picker (57) and second slides gear train (59) is connected movingly.

2. according to the described optical pickup unit core of claim 1, it is characterized in that: the spindle motor (51-1) of described spindle motor assembly (51) is a brushless electric machine; Spindle motor (51-1) is fixedly connected on the plate body of the motor mounting plate (51-3) that is fixed on the base plate (50-1) by its motor casing; CD on the base plate (50-1) reads Kong Weiyi strip medium pore (50-6);

Spindle motor assembly (51) also comprises 3 to 4 motor mounting plate joint pins (51-2); Motor mounting plate (51-3) is fixed on the base plate (50-1) from the below by each motor mounting plate joint pin (51-2), and motor mounting plate (51-3) strides across the medium pore of the strip of base (50) on fore-and-aft direction; Spindle motor (51-1) is fixed on the motor mounting plate (51-3) by its bottom, and is positioned at the top center position of motor mounting plate (51-3); The motor shaft of spindle motor (51-1) passes the strip medium pore (50-6) of base plate (50-1).

3. according to the described optical pickup unit core of claim 2, it is characterized in that: described slider block (53) has 6, is divided into slider block (53-2) in back left slider block (53-1), the back, back right slider block (53-3), preceding left slider block (53-4), preceding middle slider block (53-5) and preceding right slider block (53-6) according to the position that distributes; Each slider block (53) is equipped with the compression spring hole that axis normal is provided with; Back left slider block (53-1) and preceding left slider block (53-4) are equipped with that Open Side Down and to the right slide bar chamber; Back right slider block (53-3) and preceding right slider block (53-6) are equipped with that Open Side Down and left slide bar chamber; Slider block (53-2) is provided with that Open Side Down and slide bar chamber to the right in the back, and front middle part slider block (53-5) is provided with that Open Side Down and slide bar chamber left;

The first slide bar installation component comprise the first main slide bar vertically to stage clip (55-2), back left flap (55-3), 3 adjust screw (55-4), the first main slide bar level in stage clip (55-5), back seat board (55-6), stop screw (55-7), 2 first secondary slide bar stage clips (55-9), preceding left flap (55-10), preceding in flap (55-11); The first main slide bar (55-1), the first secondary slide bar (55-8) and the first slide bar installation component have together constituted first group of slide bar assembly (55);

The first main slide bar vertically is arranged in the compression spring hole of the left slider block in back (53-1) to stage clip (55-2), and its upper end contacts with the lower surface of base plate (50-1); The left end of the first main slide bar (55-1) stretches in the slide bar chamber of the left slider block in back (53-1), and contacts with the vertical lower end to stage clip (55-2) of the first main slide bar of top; By screw the left flap in back (55-3) is fixed on the back left slider block (53-1) from the below, and one adjusted screw (55-4) and screw from bottom to top on the left flap in back (55-3), and withstand on from bottom to top on the first main slide bar (55-1) by its tail end; Seat board (55-6) is fixed on from the below the back on the slider block (53-2) by screw in the back, and is arranged in the front end of back slider block (53-2); The upside of the right-hand member head of the first main slide bar (55-1) contacts with the lower surface of seat board (55-6) in the back, the first main slide bar level is on the direction stage clip post forward of rear sleeve slider block (53-2) in the back of stage clip (55-5), its rear end contacts with slider block (53-2) in the back, the first main slide bar level withstands on the right-hand member head rear side of the first main slide bar (55-1) to the front end of stage clip (55-5), stop screw (55-7) screws in the back on the seat board (55-6) from bottom to top, and carries out spacing by the rear side of its double-screw bolt and the frustum cone side of head to the downside and the front side of the right-hand member head of the first main slide bar (55-1);

2 first secondary slide bar stage clips (55-9) respectively vertically before being arranged on left slider block (53-4) and preceding in the corresponding compression spring hole of slider block (53-5), their upper ends separately contact with the lower surface of base plate (50-1); Before the left end of the first secondary slide bar (55-8) stretches in the slide bar chamber of left slider block (53-4), and contact with the lower end of the first secondary slide bar stage clip (55-9) of top; Before by screw preceding left flap (55-10) being fixed on from the below on the left slider block (53-4), and one adjusted screw (55-4) and screw from bottom to top on preceding left flap (55-10), and withstood on from bottom to top on the first secondary slide bar (55-8) by its tail end; In before the right-hand member of the first secondary slide bar (55-8) stretches in the slide bar chamber of slider block (53-5), and contact with the lower end of the first secondary slide bar stage clip (55-9) of top; With on the slider block (53-5) flap (55-11) in preceding is before the below is fixed on, and an adjustment screw (55-4) screws on the flap in preceding (55-11) from bottom to top by screw, and withstood on from bottom to top on the first secondary slide bar (55-8) by its tail end;

The second slide bar installation component comprise the second main slide bar vertically to stage clip (58-2), preceding right flap (58-3), 3 adjust screw (58-4), the second main slide bar level to stage clip (58-5), preceding in seat board (58-6), stop screw (58-7), 2 second secondary slide bar stage clips (58-9), back right flap (58-10), back in flap (58-11); The second main slide bar (58-1), the second secondary slide bar (58-8) and the second slide bar installation component have together constituted second group of slide bar assembly (58);

The second main slide bar vertically in the compression spring hole of right slider block (53-6), contacts with the lower surface of base plate (50-1) on it before stage clip (58-2) is arranged on; The right-hand member of the second main slide bar (58-1) stretches in the slide bar chamber of preceding right slider block (53-6), and contacts with the vertical lower end to stage clip (58-2) of the second main slide bar of top; Before by screw preceding right flap (58-3) being fixed on from the below on the right slider block (53-6), and one adjusted screw (58-4) and screw from bottom to top on preceding right flap (58-3), and withstood on from bottom to top on the second main slide bar (58-1) by its tail end; Before in seat board (58-6) by screw is before the below is fixed on the slider block (53-5), and be arranged in the front end of preceding slider block (53-5); The upside of the left end head of the second main slide bar (58-1) contacts with the lower surface of preceding middle seat board (58-6), on the direction stage clip post backward of the second main slide bar level middle slider block (53-5) before the front portion of stage clip (58-5) is enclosed within, its front end contacts with preceding middle slider block (53-5), the second main slide bar level withstands on the left end head front side of the second main slide bar (58-1) to the rear end of stage clip (58-5), seat board (58-6) screws on the slider block in preceding (53-5) in before stop screw (58-7) passes from bottom to top, and carries out spacing by the frustum cone side of the front side of its double-screw bolt and head to the downside and the rear side of the left end head of the second main slide bar (58-1);

2 second secondary slide bar stage clips (589) respectively vertically to be arranged on back right slider block (53-3) and afterwards in the corresponding compression spring hole of slider block (53-2), their upper ends separately contact with the lower surface of base plate (50-1); The right-hand member of the second secondary slide bar (58-8) stretches in the slide bar chamber of the right slider block in back (53-3), and contacts with the lower end of the second secondary slide bar stage clip (58-9) of top; By screw the right flap in back (58-10) is fixed on the back right slider block (53-3) from the below, and one adjusted screw (58-4) and screw from bottom to top on preceding left flap (55-10), and withstand on from bottom to top on the second secondary slide bar (58-8) by its tail end; The left end of the second secondary slide bar (58-8) stretches in the back in the slide bar chamber of slider block (53-2), and contacts with the lower end of the second secondary slide bar stage clip (58-9) of top; By screw will the back in flap (58-11) be fixed on from the below the back on the slider block (53-2), and one adjusted screw (58-4) and screw from bottom to top in the back on the flap (58-11), and withstood on from bottom to top on the second secondary slide bar (58-8) by its tail end.

4. according to the described optical pickup unit core of claim 3, it is characterized in that: described first slides gear train (56) comprises first stepper motor (56-1), first screw mandrel (56-2), first motor mount (56-3) and first flexible printed circuit board (56-4); First screw mandrel (56-2) is the first power output that slides gear train (56), it also is the motor shaft of first stepper motor (56-1), first stepper motor (56-1) is fixed on first motor mount (56-3) by its motor casing, and the right-hand member head of first screw mandrel (56-2) and first motor mount (56-3) are rotationally connected; The control signal output ends of first flexible printed circuit board (59-4) is electrically connected with the control end of first stepper motor (56-1); By screw first motor mount (56-3) is fixed on the base plate (50-1) from the below, and is positioned at the rear of the first main slide bar (55-1);

Second slides gear train (59) comprises second stepper motor (59-1), second screw mandrel (59-2), second motor mount (59-3) and second flexible printed circuit board (59-4); Second screw mandrel (59-2) is the second power output that slides gear train (59), it also is the motor shaft of second stepper motor (59-1), second stepper motor (59-1) is fixed on second motor mount (59-3) by its motor casing, and the right-hand member head of second screw mandrel (59-2) and second motor mount (59-3) are rotationally connected; The control signal output ends of second flexible printed circuit board (59-4) is electrically connected with the control end of second stepper motor (59-1); By screw second motor mount (59-3) is fixed on the base plate (50-1) from the below, and is positioned at the rear of the second main slide bar (58-1).

5. according to the described optical pickup unit core of claim 4, it is characterized in that: the light picker of described first light picker (54) for matching with a kind of CD of standard and using, the light picker of second light picker (57) for matching and use with the CD of another kind of standard;

First light picker (54) comprises light picker main body (54-1), back linking arm (54-2), preceding linking arm (54-3), first feed screw nut (54-4) and the first buffering stage clip; Back linking arm (54-2) and preceding linking arm (54-3) are connected as a single entity with the shell of light picker main body (54-1), and back linking arm (54-2) is positioned at the rear side of light picker main body (54-1), and preceding linking arm (54-3) is positioned at the front side of light picker main body (54-1); The direction of the optical lens of light picker main body (54-1) upwards; The back linking arm (54-2) of first light picker (54) is enclosed within on the first main slide bar (55-1), and horizontally slips with the first main slide bar (55-1) and to be connected; The preceding linking arm (54-3) of first light picker (54) is contacted with the first secondary slide bar (55-8) by following three directions in last back, and is stuck on the first secondary slide bar (55-8); First feed screw nut (54-4) is the power input component of first light picker (54), first feed screw nut (54-4) comprises mount pad (54-4-1) and is connected the opening deckle board spare (54-4-2) up of mount pad (54-4-1) back side top, the rear end face of the back side panel of deckle board spare (54-4-2) is provided with thread (54-4-3), and first feed screw nut (54-4) is meshed with first screw mandrel (56-2) at rear by its thread (54-4-3); First feed screw nut's (54-4) mount pad (54-4-1) from upper fixed on back linking arm (54-2); The first buffering stage clip is arranged between the front side deckle board and back side panel of deckle board spare (54-4-2) of first feed screw nut (54-4);

Second light picker (57) comprises light picker main body (57-1), preceding linking arm (57-2), back linking arm (57-3), second feed screw nut (57-4) and the second buffering stage clip (57-5); Preceding linking arm (57-2) and back linking arm (57-3) are connected as a single entity with the shell of light picker main body (57-1), and preceding linking arm (57-2) is positioned at the front side of light picker main body (57-1), and back linking arm (57-3) is positioned at the rear side of light picker main body (57-1); The direction of the optical lens of light picker main body (57-1) upwards; The preceding linking arm (57-2) of second light picker (57) is enclosed within on the second main slide bar (58-1), and horizontally slips with the second main slide bar (58-1) and to be connected; The back linking arm (57-3) of second light picker (57) is contacted with the second secondary slide bar (58-8) by following three directions of going forward, and is stuck on the second secondary slide bar (58-8); Second feed screw nut (57-4) is the power input component of second light picker (57), second feed screw nut (57-4) comprises mount pad (57-4-1) and is connected the opening deckle board spare (57-4-2) up of top, mount pad (57-4-1) front side, the front end face of the front side board of the deckle board of deckle board spare (57-4-2) is provided with thread (57-4-3), and second feed screw nut (57-4) is meshed with second screw mandrel (59-2) in the place ahead by its thread (57-4-3); Second feed screw nut's (57-4) mount pad (57-4-1) from upper fixed on preceding linking arm (57-2); The second buffering stage clip (57-5) is arranged between the rear side deckle board and front side board of deckle board spare (57-4-2) of second feed screw nut (57-4).

6. according to the described optical pickup unit core of claim 5, it is characterized in that: described first light picker (54) also comprises first contact (54-6); Second light picker (57) also comprises the second wafer (57-6); Spindle motor assembly (51) also comprises first switch (51-4) and second switch (51-5);

First contact (54-6) from upper fixed on the front side frame of first feed screw nut (54-4); The second wafer (57-6) from upper fixed on the rear frame of second feed screw nut (57-4);

First switch (51-4) is fixed on the motor mounting plate (51-3), and is positioned at the left back position, top of motor mounting plate (51-3), and switch contact stretches out left; Second switch (51-5) is fixed on the motor mounting plate (51-3), and is positioned at the right front position, top of motor mounting plate (51-3), and switch contact stretches out to the right.

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