JP3957892B2 - Optical pickup assembly method and apparatus - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an assembling method and apparatus for an optical pickup used for a disk deck such as a compact disk (CD), and more particularly to a method and apparatus for attaching a magnet to a yoke base.
[0002]
[Prior art]
FIG. 8 shows an optical pickup used in a conventional CD deck. In FIG. 8, reference numeral 1 denotes a yoke base made of a magnetic material, and magnets 3 are fixed to the protruding pieces 2 at both ends of the yoke base 1. A bobbin 4 is held on the yoke base 1 by a wire 5. A focus servo drive coil 6 and a tracking servo drive coil 7 are attached to the bobbin 4. Reference numeral 8 denotes an objective lens provided on the bobbin 4.
[0003]
In FIG. 8, when a current is supplied to the drive coil 6 through the wire 5, a driving force is generated by the magnetic field of the magnet 3 and the current flowing through the drive coil 6, and the bobbin 4 moves in the vertical direction. On the other hand, when a current is supplied to the drive coil 7 via the wire 5, a driving force is generated by the magnetic field of the magnet 3 and the current flowing through the drive coil 7, and the bobbin 4 moves in the horizontal direction. Further, the laser light that has exited from the objective lens 8 and reflected by the disk returns to the objective lens 8, is detected by a photodetector, and a reproduction signal is extracted.
[0004]
[Problems to be solved by the invention]
When assembling the optical pickup having the above-described configuration, the operation of attaching the magnet 3 to the projecting piece 2 of the yoke base 1 is conventionally performed by manual operation while checking the polarity of the magnet 3 one by one. Due to this, it was adhered to the protruding piece 2. For this reason, there was a problem that workability was poor and the cost was high.
[0005]
The present invention solves such a conventional problem, and provides an optical pickup assembling method and apparatus capable of easily fixing a magnet to a yoke base with a simple configuration, and a method for determining the polarity of aligned magnets. The purpose is to provide.
[0006]
[Means for Solving the Problems]
In order to achieve the above object, the present invention makes a magnet row by attracting a plurality of pre-magnetized magnets to each other, and the magnet at the end of the magnet row is separated from the magnet row by pressing means. It is supplied to a predetermined position and does not require a mechanism for aligning the magnets. In addition, since the magnet row is transferred using the magnetic force of the magnet itself, a mechanism for moving the magnet row is not required, and it is simple. The magnet assembly of the optical pickup can be easily performed with the configuration. In addition, since the magnets are arranged in a line, it is possible to determine all the polarities of the aligned magnets at once by determining the polarity of the end, and it is necessary to check the polarity of the magnets one by one There is no.
[0007]
DETAILED DESCRIPTION OF THE INVENTION
This onset Ming constitutes the first and second magnets column previously magnetized plurality of magnets are adsorbed to each other, the magnet of the ends of the first and second magnet row, by the pressing member An optical pickup assembling method characterized in that the optical pickup assembly method supplies a predetermined position of a yoke base apart from the first and second magnet rows, and uses a magnet's magnetic force to align a plurality of magnets. This has the effect of not requiring an alignment step.
[0008]
This onset Ming constitutes the first and second magnets column previously magnetized plurality of magnets are adsorbed to each other, said first and second magnet rows toward each other by the magnetic attraction force An optical pickup assembling method, wherein the magnets at the inner end portions of the magnet rows are separated from the magnet rows at the same time by a pressing member and are supplied to predetermined positions on the yoke base. Since the magnet row is transferred, the magnet row transfer process is not required.
[0009]
This onset Akira includes first and second guide means for guiding the first and second magnet rows aligned with adsorb to each other in advance magnetized plurality of magnets, said first and second and the magnetic block for suctioning the respective magnets column by the magnetic force of each magnet row is disposed at one end of the second guide means, moves in a direction perpendicular to the guide direction of the magnets column by the respective guide means possible, the an optical pick-up assembly apparatus having a pressing means for supplying to the yoke base away magnet end of each magnet row from the respective magnets column, alignment of the magnet using a magnet own magnetic force, In order to perform the transfer, there is an effect that a means for aligning a plurality of magnets and a means for transferring the magnets are not required.
[0010]
This onset Ming is an optical pickup assembly according to paragraph 0009, wherein a groove in which the magnet end of each magnet row on one of the pressing means is engaged is formed, the end of the magnet row Since the magnet of the portion engages with the groove of the pressing means, the magnet at the end of the magnet row can be easily separated from the magnet row simply by moving the pressing means.
[0011]
This onset Ming, previously magnetized a plurality of first and second guide means for guiding the first and second magnet rows magnet was allowed to adsorb to aligned with each other, the first and second It is disposed between the inner end portions of the guide means and is movable in a direction orthogonal to the guide direction of the magnet rows by the respective guide means, and the magnets at the inner end portions of the respective magnet rows are separated from the respective magnet rows. And a pressing means for supplying the yoke base to a predetermined position of the yoke base. The optical pickup assembly apparatus moves the magnet rows in order to move them closer to each other using the magnetic force of the first and second magnet rows. It has the effect that no transfer means is required.
[0012]
This onset Akira includes the placed magnetic blocks between the inner ends of the first and second guide means, wherein the magnetic attraction force generated between the magnets column and said magnetic material block, wherein each magnet The optical pickup assembling apparatus according to Paragraph 0011, wherein the rows are moved in a direction approaching each other, and in addition to the magnetic force of the first and second magnet rows, the first and second magnet rows and the magnetic body Since it moves in the direction which approaches mutually using the attractive force between blocks, it has the effect | action that the transfer means which moves a magnet row | line | column is not required.
[0013]
This onset Ming, previously magnetized plurality of polarity determination magnet and guide means for guiding the magnet rows aligned adsorbed each other, which is movably arranged opposite to an end portion of said magnet rows of magnets And detecting the movement of the polarity determination magnet due to a magnetic attractive force acting between the magnet row and the polarity determination magnet, thereby determining the polarity of the magnet row accommodated in the guide means. The method of determining the magnet polarity of the optical pickup is such that the polarity of the magnets arranged in a line can be determined at a time, and there is no need to check the polarity of the magnets one by one.
[0014]
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
(Embodiment)
FIG. 1 is a front view of a magnet assembling apparatus according to an embodiment of the present invention, and FIG. 2 is a side view of the apparatus. 1 and 2, reference numeral 1 denotes a yoke base made of a magnetic material, which is held on a pallet 14 that is transported by a left-right conveyor 15 in FIG. Reference numerals 2 denote projecting pieces rising on both sides of the yoke base 1, and a magnet 3 is fixed to each inside. A plurality of magnets 3 are attracted to and aligned with each other by magnetic force to form a magnet row, and such magnet rows are guided by the guide grooves 9 and are opposed to the left and right sides. Reference numeral 10 denotes a magnetic block arranged between the left and right guide grooves 9, and the aligned left and right magnet rows are arranged in the direction of the magnetic block 10 and between the magnetic attraction force and the magnetic block 10. It is attracted by magnetic attraction force. Reference numeral 11 denotes a pressing block made of a nonmagnetic material that is driven in the vertical direction by the drive mechanism 16, and a pair of parallel pressing pieces 12 are formed on both sides of the lower portion of the pressing block 11. Reference numeral 13 denotes a groove formed in the lower part on both outer sides of the pressing piece 12, and the magnets 3A and 3B at the inner ends of the left and right magnet rows can be engaged with each other.
[0015]
Next, the operation of the magnet assembling apparatus configured as described above will be described with reference to FIGS. As shown in FIG. 3, the aligned left and right magnet rows are guided in the guide groove 9 and are attracted in a direction approaching each other by their own magnetic attractive force and magnetic attractive force between the magnetic block 10 and Magnets 3 </ b> A and 3 </ b> B at the inner end of each magnet row engage with the groove 13 of the pressing block 11. Next, as shown in FIG. 4, when the pressing block 11 is moved downward by the drive mechanism, the end magnets 3 </ b> A and 3 </ b> B of the left and right magnet rows overcome the mutual magnetic attractive force in each magnet row and press downward. Is done. When the pressing block 11 moves further downward, as shown in FIG. 5, it reaches the upper inner surface of the projecting piece 2 of the yoke base 1 to which the adhesive has been applied in advance, and the magnets 3A and 3B are projected by their own magnetic force. Adsorbed to 2 and fixed by an adhesive. Next, when the pressing block 11 is moved upward by the driving mechanism, the left and right magnet rows are attracted by the magnetic block 10 as shown in FIG. The pressing piece 12 is engaged with the groove 13. In FIG. 6, when the supply of the magnet 3 to the yoke base 1 is completed, the yoke base 1 is transferred by a conveyor, and the next yoke base 1 is supplied below the pressing block 11 as shown in FIG. Then, through the same process as described above, the magnets 3A and 3B at the inner end portions are bonded and fixed to the protruding pieces 2 of the yoke base 1, respectively.
[0016]
As described above, according to the present embodiment, since the magnet 3 forms a magnet row by aligning a plurality of magnets using its own magnetic force, a mechanism for aligning the magnets is particularly required. Moreover, since the magnet row can be transferred to the groove 13 of the pressing piece 12 of the pressing block 11 using the magnetic force of the magnet 3 itself, there is an advantage that a mechanism for transferring the magnet row is not required.
[0017]
FIG. 7 shows a method of determining the polarity of the magnet row accommodated in the guide groove 9. In FIG. 7, 9 is a guide groove, 9 A is a partition wall formed in the guide groove 9, and 17 is a sliding member that is slidably held at the outer end of the guide groove 9. A magnet 18 for polarity determination is fixed to the end. Reference numeral 19 denotes a compression coil spring that urges the sliding member 17 in the direction of the partition wall 9 </ b> A to lightly contact the magnet 18 with the partition wall 9 </ b> A in a normal state, and 20 denotes a transmission type disposed on both sides of the sliding member 17. This is an optical sensor.
[0018]
In FIG. 7, when the polarity of the magnet 18 for polarity determination is N pole on the partition wall 9A side and S pole on the sliding member 17 side, the magnet row is accommodated in the guide groove 9 so that the partition wall 9A side is N pole. In this case, a repulsive force is generated between the magnet row and the magnet 18, and the magnet 18 is pushed rightward in FIG. For this reason, the light to the transmissive optical sensor 20 is blocked by the sliding member 17 and turned off. On the other hand, when the magnet row is accommodated in the guide groove 9 so that the partition wall 9A side is the S pole, an attractive force is generated between the magnet row and the magnet 18, and the magnet 18 is pushed in the left direction in FIG. For this reason, the light to the transmissive optical sensor 20 is not blocked by the sliding member 17, and the transmissive optical sensor 20 is turned on. Thus, the polarity of the magnet row accommodated in the guide groove 9 can be determined by turning on and off the transmissive optical sensor 20, and the magnet 3 can be attached to the yoke base 1 in the correct orientation.
[0019]
【The invention's effect】
As is apparent from the above embodiment, the present invention is configured such that a plurality of pre-magnetized magnets are attracted to each other to form a magnet row, and the magnets at the ends of the magnet row are separated from the magnet row by pressing means, and the yoke is separated. It is supplied to a predetermined position of the base, and does not require a mechanism for aligning the magnets. Further, since the magnet row is transferred using the magnetic force of the magnet itself, a mechanism for moving the magnet row is not required. The magnet assembly of the optical pickup can be easily performed with a simple configuration. In addition, since the magnets are arranged in a line, it is possible to determine all the polarities of the aligned magnets at once by determining the polarity of the end, and it is necessary to check the polarity of the magnets one by one There is an effect that there is no.
[Brief description of the drawings]
FIG. 1 is a front view of a magnet assembling apparatus according to an embodiment of the present invention. FIG. 2 is a side view of a magnet assembling apparatus according to an embodiment of the present invention. FIG. 4 is a schematic diagram of a magnet assembling process in the embodiment of the present invention. FIG. 5 is a schematic diagram of a magnet assembling process in the embodiment of the present invention. Schematic diagram [FIG. 7] Schematic diagram of a magnet polarity determination method according to an embodiment of the present invention. [FIG. 8] A perspective view showing a configuration example of an optical pickup.
DESCRIPTION OF SYMBOLS 1 Yoke base 2 Protruding piece 3 Magnet 9 Guide groove 10 Magnetic body block 11 Pressing block 12 Pressing piece 13 Groove 14 Pallet 15 Conveyor 16 Drive mechanism 17 Sliding member 18 Magnet 19 for a polarity judgment Compression coil spring 20 Transmission type optical sensor

Claims (6)

A plurality of pre-magnetized magnets are attracted to each other to form first and second magnet arrays, and the end magnets of the first and second magnet arrays are simultaneously pressed by the first pressing member. And an optical pickup assembling method, wherein the optical pickup assembly is supplied to a predetermined position of the yoke base apart from the second magnet row.   A plurality of pre-magnetized magnets are attracted to each other to form first and second magnet rows, and the first and second magnet rows are moved toward each other by magnetic attraction, An optical pickup assembling method, wherein magnets at inner end portions of magnet rows are simultaneously separated from the magnet rows by pressing members and supplied to predetermined positions on the yoke base. First and second guide means for guiding first and second magnet rows in which a plurality of pre-magnetized magnets are attracted and aligned with each other, and one end of the first and second guide means and the magnetic block for suctioning the respective magnets column by the magnetic force of each magnet row is disposed on the side, is movable above in a direction perpendicular to the guide direction of the magnets column by the respective guiding means, wherein each of the magnets An optical pickup assembling apparatus comprising: one pressing means for supplying the magnets at the ends of the rows to the yoke base at the same time apart from the respective magnet rows. 4. The optical pickup assembling apparatus according to claim 3, wherein a groove for engaging a magnet at an end of each magnet row is formed in the one pressing means. First and second guide means for guiding the first and second magnets column previously magnetized plurality of magnets are aligned adsorbed each other, inner end of the first and second guide means It is arranged between the parts and is movable in a direction perpendicular to the guide direction of the magnet rows by the respective guide means, and the magnets at the inner end portions of the respective magnet rows are separated from the respective magnet rows, and the yoke base is predetermined. An optical pickup assembling apparatus comprising pressing means for supplying the position. Comprising said first and second inner end portion between the arranged magnetic block guide means, said by magnetic attraction force generated between the magnets column and the magnetic block, approaching the respective magnets column together 6. The optical pickup assembling apparatus according to claim 5, wherein the optical pickup assembling apparatus is transported in a moving direction.

Images