JP3684623B2 - Transport pallet for optical pickup adjustment process - Google Patents

Description

[0001]
[Industrial application fields]
The present invention clamps an optimal optical pickup used for reproducing information from a disk-shaped information recording medium or recording a signal on the information recording medium, and finely adjusts various elements incorporated in the optical pickup. The present invention relates to a conveyance pallet used in the case of.
[0002]
[Prior art]
For example, an optical disk apparatus used for an information recording medium such as an optical disk such as a compact disk can reproduce information from a desired position on the optical disk by moving the optical pickup in the radial direction of the optical disk. Yes.
Such an optical pickup OP has an objective lens OB as shown in FIGS. The objective lens OB can be moved by an electromagnetic drive mechanism in a focus direction (a direction in which the objective lens approaches or moves away from the compact disk) and a tracking direction (a direction perpendicular to the focus direction). In addition, the optical pickup includes various optical elements for guiding the laser beam of the laser light source to the compact disc, and a light receiving element for receiving a return light of the compact disc and detecting a signal.
Such an optical pickup OP is clamped with respect to the reference shafts BS1 and BS2 of the transport pallet TP, whereby the position of the optical pickup is determined. The reference shaft BS2 is inserted into the hole 1 of the optical pickup OP. On the other hand, another reference shaft BS1 is configured such that a lateral U-shaped attachment portion 2 is fitted from the lateral direction.
[0003]
[Problems to be solved by the invention]
By the way, between the reference shaft BS2 and the hole 1 in FIG. Since the attachment portion 2 in FIG. 27 has a long lateral length, the attachment portion 2 does not come off the reference shaft BS1 even if there is a backlash as described above.
However, in the case of the mounting portion 3 of the optical pickup OP as shown in FIG. 28, the optical pickup OP is becoming thinner and smaller, and the lateral length is shortened. Therefore, when the transport pallet TP is transported, the attachment portion 3 may be detached from the reference shaft BS1.
Further, such a transport pallet TP has a flexible wiring portion for relay for sending an adjustment signal to the optical pickup OP from an external adjustment test device and taking out the signal returned from the optical pickup. ing.
This conventional flexible wiring portion for relay corresponds to one type of optical pickup. If another type of optical pickup is to be clamped on the transport pallet TP, there is a problem that the flexible wiring section for relaying cannot be connected to the optical pickup side because the shape is different. Therefore, in that case, another transport pallet TP having a flexible wiring portion for relay corresponding to the type of the optical pickup must be prepared.
[0004]
Furthermore, when a power supply or signal is sent from the external adjustment test device to the flexible wiring portion for relay described above, the conduction unit of the external device is contact probe with respect to the flexible wiring portion of the transport pallet. Is performed directly. In this case, since the contact surface of the flexible wiring part that the contact probe touches is a structure in which the wiring is only drawn on the plastic base film, the surface is very soft and the contact probe protrusion is the soft surface. The contact probe, the pressure of the contact probeAs a result of the formation of dents and accumulation of dirt in the fine holes, the tip cannot contact the wiring on the contact surface correctly.. Therefore, a conduction failure occurs between the conduction unit of the external device and the flexible wiring portion.
The flexible wiring portion is very thin (for example, about 20 to 50 μm) and the surface material is soft (to facilitate bending). Therefore, when a contact probe or the like is repeatedly pressed against the flexible wiring portion, the contact portion of the flexible wiring portion is deteriorated, resulting in poor conduction.
Therefore, the present invention has been made to solve the above problems, and when adjusting the optical pickup, it can be securely clamped to the conveyance pallet, and can be electrically connected to a plurality of types of optical pickups. It is an object of the present invention to provide a transport pallet that can be performed and can reliably perform electrical exchange with external equipment.
[0005]
[Means for Solving the Problems]
  According to the first aspect of the present invention, there is provided an optical pickup for transporting an optical pickup used for recording information on an information recording medium or adjusting an optical pickup used for reproducing information on the information recording medium. In the transport pallet, the first passing through one end of the optical pickupStandardA first holding unit for pressing and holding the shaft, and a second passing through the other open end of the optical pickup.StandardA second holding portion for pressing and holding the shaft, and a flexible wiring portion for electrically connecting to the optical pickup;The flexible wiring portion includes a contact portion connected to an external power supply portion, a first connection end portion for the first optical pickup branched at the contact portion, and a second portion for the second optical pickup. And having a connecting endThis is achieved by the transport pallet for the optical pickup adjustment process.
[0006]
  In the invention of claim 2, preferably, the direction in which the first holding portion presses the first shaft and the direction in which the second holding portion presses the second shaft face each other.
  Claim3Preferably, the first connection end of the flexible wiring portion is led out and bent in the first direction of the contact portion, and the second connection end is in the second direction of the contact portion. The first connection end and the second connection end are arranged so as to be substantially parallel by being led out and bent.
  Claim4In the present invention, the second connection end is preferably bent via the interposition plate.
  Claim5In the invention, the conductive wire of the flexible wiring section preferably includes a conductive pin for contacting a contact probe of an external power supply section.
  Claim6In the invention, the pin of the flexible wiring portion is preferably soldered to the ring-shaped conductive wire portion arranged in the middle of the conductive wire of the flexible wiring portion.
  Claim7In the invention, the ring-shaped conductive line portions of the adjacent conductive lines are preferably arranged at positions shifted from each other.
[0007]
[Action]
  In the first aspect of the present invention, the first holding portion of the transport pallet presses and holds the first shaft that has passed through one end of the optical pickup. The second holding portion of the transport pallet presses and holds the second shaft that has passed through the other open end of the optical pickup. The flexible wiring portion is electrically connected to the optical pickup. Thus, the optical pickup is pressed and clamped between the first holding unit and the second holding unit, so that the optical pickup does not fall off the transfer pallet even if the transfer pallet is transferred.Moreover, since the contact part of the flexible wiring part is branched into a first connection end part for the first optical pickup and a second connection end part for the second optical pickup, these connection end parts are , Can be electrically connected to different types of optical pickups.
  In the invention of claim 2, since the pressing direction of the first shaft and the pressing direction of the second shaft are opposite to each other, the optical pickup is not dropped from the conveying pallet when conveying the conveying pallet.
  Claim4In this invention, since the second connection end is bent via the interposition plate, the second connection end can be smoothly changed without being bent at an extreme curvature.
  Claim5In this invention, the pin of the conductive line of the flexible wiring portion comes into contact with the contact probe of the external power supply portion. Therefore, since the conducting wire of the flexible wiring portion does not directly contact the contact probe, wear and deterioration of the conducting wire can be prevented, and electrical connection can be ensured.
  Claim6 and 7In this invention, the ring-shaped conducting wire portion of the conducting wire is electrically connected to the pin, and the ring-shaped conducting wire portions are offset from each other, so that the contact probes can be arranged at offset positions. Therefore, even if a large number of contact probes are arranged, the space occupied by the flexible wiring portion can be reduced.
[0008]
【Example】
Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.
In addition, since the Example described below is a suitable specific example of this invention, various technically preferable restrictions are attached | subjected, However, The scope of the present invention limits this invention especially in the following description. As long as there is no description of the effect, it is not restricted to these aspects.
[0009]
1 to 5 show a preferred embodiment of the transport pallet of the present invention.
1 to 5, the transport pallet 10 includes a first reference side reference shaft 12, a second reference side reference shaft 14, a first holding unit 22, a second holding unit 24, and a flexible wiring for relay. Part 30 and the like.
The two reference shafts 12 and 14 are arranged in parallel in the space of the transport pallet 10 with a space therebetween. The reference shaft 12 has a diameter of 2.5 mm, for example, and the reference shaft 14 has a diameter of 2 mm.
The optical pickup OP can be clamped by the first holding part 22 and the second holding part 24 via the reference shafts 12 and 14 corresponding to the optical disk D.
Referring to FIGS. 2 and 9, the first holding part 22 has a recess 31 as shown in FIG. The recess 31 contains the reference shaft 12. The width d and height e of the recess 31 are set to be, for example, 1 mm larger than the diameter c of the reference shaft 12. Therefore, the reference shaft 12 can move plus or minus 0.5 mm in the directions of arrows X and Y in FIG.
[0010]
Then, the shaft pressing plate 32 in FIG. 7 rotates around the rotation shaft 32b, and the reference shaft 12 is moved along the arrow R direction as shown in FIG. 7 to the objective lens OB of the optical pickup OP (see FIG. 9). It can be pushed to the side. The shaft pressing plate 32 presses the reference shaft 12 with a compression coil 32a. The shaft pressing plate 32, the compression coil 32a, and a part of the reference shaft 12 are covered with a shaft cover 32b.
On the other hand, the reference shaft 14 of FIG. 9 is in the hole 40 of the transport pallet 10 of FIG. The diameter a of the reference shaft 12 is set smaller than the diameter b of the hole 40. The diameter b is set to be about 1 mm larger than the diameter a. As a result, the reference shaft 14 can move about plus or minus 0.5 mm in the directions of the arrows X and Y.
The reference shaft 14 is pressed in the direction of the arrow R1 by the leaf spring 41 of FIG. That is, the reference shaft 14 is pressed against the objective lens OB side of the optical pickup OP of FIG.
Next, an example of the optical pickup OP shown in FIG. 1 and the like and a mounting state of the transport pallet 10 will be described with reference to FIG.
[0011]
The optical pickup OP in FIG. 6 includes a biaxial actuator 50 and other optical elements such as a multi lens 51, a grating lens 52, and a photodetector PD. The biaxial actuator 50 has an objective lens OB. By driving the electromagnetic drive unit 53, the biaxial actuator 50 can move the objective lens OB along the focus direction Fcs and the tracking direction Trk.
The reference shaft 12 is fitted in the hole 54a of the one end portion 54 of the optical pickup OP. On the other hand, the other reference shaft 14 is detachably inserted into a horizontal U-shaped attachment portion 56 of the optical pickup OP.
[0012]
As described above, the reference shaft 12 in FIG. 7 is pressed in the direction of the arrow R by the shaft pressing plate 32 of the transport pallet 10. The reference shaft 14 in FIG. 8 is pressed in the direction of the arrow R1 by a plate spring 41 that is a shaft pressing spring. Accordingly, since the optical pickup OP is biased toward the direction of the arrows R and R1 in the transport pallet 10, the optical pickup OP may be detached from the transport pallet 10 when transporting the transport pallet 10. Absent.
As described above, the compression coil spring 32a and the shaft pressing plate 32 are added in the first holding portion 22 in FIG. 7, and the leaf spring 41 is only added in the second holding portion 24 in FIG. Since the reference shafts 12 and 14 are pressed in directions facing each other, the optical pickup OP does not fall from the transport pallet 10 even if vibration is applied to the transport pallet 10. In this case, since only the weak spring force of the compression coil 32a and the leaf spring 41 is used, there is no problem in the positioning operation of the optical pickup OP on the transport pallet 10.
The optical pickup OP is clamped on the transport pallet 10 as shown in FIG. 6 to fix the height and inclination of the optical pickup OP. Thereafter, the optical pickup OP is pushed in the direction of arrow E from the side surface 60 side of the optical pickup OP, so that the optical pickup OP is completely fixed by pushing against the reference block having no opposite side surface 61.
[0013]
The optical pickup OP thus fixed is fixed by adjusting device side (machine side) just clampers 70 and 70 with respect to the reference shaft 12 as the main axis and the reference shaft 14 as the auxiliary axis. That is, the reference shaft 12 is fixed by one just clamper 70 and the reference shaft 14 is fixed by the other shaft clamper 70. Since the reference shafts 12 and 14 have clearances as shown in FIGS. 11 and 10 of about 0.5 mm in the entire circumferential direction, the just clamper 70 on the machine side and the platen of the transport pallet 10 do not interfere with each other.
In a state where the optical pickup OP is fixed with respect to the reference block 69 of FIG. 6, the tangential skew (TAN SKEW, arrow R3 direction), radial skew (RAD SKEW, arrow R4) of the objective lens OB, and the biaxial actuator 50 Skew (tilting, X, Y adjustment), multi-lens 51 adjustment, grating 52 adjustment, photo detector (PB) XY adjustment, and the like.
It has been impossible in the past to make fine adjustments of the optical pickup to the mechanical accuracy of the pallet, and the reference shaft of the optical pickup is clamped by the positioning block in the same way as the mold accuracy inside the machine. In order to determine the position, the reference shafts 12 and 14 require a clearance that is, for example, about 1 mm larger than the outer diameter of the reference shaft (that is, 0.5 mm along the entire circumference of the reference shaft). However, even if the optical pickup is made thinner and smaller, and the second reference side (reference shaft 14 side) of the optical pickup has the clearance as described above, in the embodiment of the present invention, Since there is a compression coil, the attachment portion 56 in FIG. 6 is not detached from the reference shaft 14. That is, even if the length of the mounting portion 56 is short, the optical pickup OP is pressed inward due to the presence of the compression coil 32a and the leaf spring 41 in FIGS. I can't come off.
[0014]
Next, the structure of the flexible wiring portion 30 for relay in FIG. 1 will be described.
The flexible wiring portion 30 is fixed to the transport pallet 10 with screws 10a shown in FIG. This flexible wiring portion 30 is shown in FIGS. The flexible wiring section 30 for relay performs relay for electrically connecting the electromagnetic drive section 53 of the optical pickup OP, the laser light source, the photodetector PD, and the like of FIG. 6 to an external adjustment device. This adjusting device supplies power to the electromagnetic drive unit 53 and the laser light source, and receives signals from the photodetector PD and the like.
[0015]
Reference is first made to FIG. The flexible wiring portion 30 includes a contact portion 80, a first connection end portion 81, and a second connection end portion 83. The contact part 80 is a part connected to an external adjustment device, for example, a power supply part. The first wiring end 81 and the second wiring end 83 are led out from the contact portion 80 in different directions.
FIG. 13 shows a state where the flexible wiring portion 30 is developed. The second connection end 83 of the flexible wiring section 30 is bent in a state indicated by a two-dot chain line in FIG. Moreover, the first connection end 81 is bent 90 degrees with respect to the contact portion 80. The state bent in this way is shown in FIG.
[0016]
In FIG. 12, the first connection end portion 81 is bent in a direction perpendicular to the contact portion 80. On the other hand, the second connection end portion 83 is folded once at the turn-back portion 82 and further bent so as to be substantially parallel to the first connection end portion 81.
The structure of the folded portion 82 is as follows. The second connection end 83 is bent with an intervening plate 84 interposed. When the second connection end 83 is bent through the interposition plate 84 in this way, the state shown in FIGS. 23 and 12 is obtained. If the second connection end 83 is bent as shown in FIG. 22 without using the intervening plate 84, stress is generated in the bent apex portion 83d and the conductive wire of the flexible wiring portion 30 is likely to be disconnected. Therefore, as shown in FIG. 23, the second wiring end portion 83 is preferably folded back at the folding portion 82 via the interposition plate 84.
[0017]
The first connection end portion 81 and the second connection end portion 83 in FIGS. 12 and 13 have a shape developed vertically through the contact portion 80. The reason why the first connection end portion 81 and the second connection end portion 83 are provided in this way is to connect to a flexible wiring portion of another type of optical pickup as shown in FIGS. For example, the first connection end portion 81 in FIG. 12 is connected to the flexible wiring portion 77 of the optical pickup OP1 of a certain type in FIG. On the other hand, the second connection end portion 83 in FIG. 12 is connected to the flexible wiring portion 78 of another optical pickup OP2 in FIG. By providing two types of connection end portions 81 and 83 in this way, it is possible to connect to different optical pickups OP1 and OP2 as shown in FIGS. Further, by adopting a wiring structure that is vertically separated like the connection end portions 81 and 83, measures against external noise can be taken.
If the connection ends 81 and 83 are not arranged separately as shown in FIG. 12, the jumper line JP is connected to the conductive line 99 of the flexible wiring part 30 as shown in FIG. However, in this case, in the cross-sectional structure of the flexible wiring portion 30, the protective material 101 is divided into two parts through the intermediate material 102 as shown in FIG. The signal line 103 is covered. Therefore, as the flexible wiring portion 30 becomes thicker, the strain becomes stronger and the flexibility, that is, the ease of bending and workability, which are the advantages of the flexible wiring portion 30, are impaired. In addition, it is difficult to manufacture such a flexible wiring portion having a large thickness, which increases costs. Therefore, the flexible wiring portion 30 having the structure as shown in FIG. 12 is advantageous in terms of cost and flexibility in actual use.
[0018]
If the second connecting end 83 is to be guided to the optical pickup side without providing the folded portion 82 in FIG. 12, the processing is troublesome because the lower side of the transport pallet must be passed. For this reason, the folded portion 82 of FIG. 12 is provided to lift the second connection end 83 to the same position as the first connection end 81.
By adopting such a structure, the first connecting end 81 and the second connecting end 83 can be made thin, and therefore, when mounted on the transport pallet 10, the bending process is easy. In addition, the flexible wiring portion 30 can be easily manufactured.
FIG. 14 shows an example in which the first connection end 81 is connected to the clamper 173. FIG. 15 shows an example of connection to the clamper 171 of the second connection end 83.
[0019]
Next, the structure of the contact part 80 of the flexible wiring part 30 in the contact part 80 of the flexible wiring part 30 of FIG. 12 is demonstrated.
As shown in FIGS. 24 to 26, the contact portion 80 has a plurality of conductive wires 120 arranged in parallel. A ring-shaped conductive line portion 130 is provided in the middle of the conductive line 120. In this case, the ring-shaped conducting wire portions 130 are arranged at positions shifted from each other. By doing in this way, even if many ring-shaped conducting wire parts 130 exist, the space | interval of the adjacent conducting wires 120 and 120 can be narrowed.
Corresponding to the ring-shaped conducting wire portion 130, a pin 140 is fitted as shown in FIG. The pin 140 is electrically connected and fixed to the ring-shaped conducting wire portion 130 by solder 141, and the tip portion 143 of the pin 140 is fitted in the hole 151 of the insulating plate 150. An example of the green plate 150 is shown in FIGS.
The pin 140 is a conductive member plated with, for example, BeCuK rhodium. The insulating plate 150 may be a glass epoxy plate or a bake plate, for example.
[0020]
The insulating plate 150 holds the flexible wiring portion 30, and the insulating plate 150 has both insulating properties and heat resistance. Thus, the green plate 150 has heat resistance when the conductive wire 120 and the pin 140 of the flexible wiring portion 30 are soldered with the solder 141, and also ensures insulation of the adjacent pins 130 and 130. . The pin 140 is preferably made of a conductive and inexpensive material.
The pin 140 is for contacting an external adjustment device, for example, the contact probe 161 of the power supply unit 160. Since the plurality of pins 140 can be arranged with their positions shifted as shown in FIG. 19, the occupied area or the occupied width can be reduced even if the number of pins is large. Since there are, for example, 22 conductive lines 120 that are signal lines coming out of the optical pickup OP, it is large if a plurality of contact probes 161 are arranged in a horizontal row and an interval at which the contact probes 161 do not interfere with each other is obtained. Space is required. However, in the embodiment of FIGS. 24 and 25, the pins 140 are alternately arranged one by one, so that the space occupied by the pins 140 can be reduced and the contact probes 161 do not interfere with each other.
[0021]
The reason for providing the pins 140 with respect to the conductive wires 120 of the flexible wiring portion 30 in this way is as follows. That is, when the protrusion at the tip of the contact probe 161 is brought into direct contact with the conducting wire 120 of the flexible wiring portion 30 to obtain electrical conduction, the surface of the flexible wiring portion 30 is soft, and thus the contact probe 161 and the conducting wire 120 are used. This is to cope with the problem that the contact failure occurs between the two or the flexible wiring portion 30 is deteriorated. In this embodiment, since the contact probe 161 directly hits the pin 140, the flexible wiring portion 30 is not deteriorated and electrical conduction can be ensured.
Further, the stepped pin 140 is adapted to be fitted to the insulating plate 150 which is a rigid body. This is because the holding force of the pin 140 is weak just by attaching the pin 140 to the conductive wire 120 of the flexible wiring portion 30 with the solder 141, and therefore the insulating plate 150 needs to strengthen the holding of the pin 140. It is. The pin 140 is firmly fixed to the insulating plate 150. Moreover, since the pin 140 is firmly fixed by the insulating plate 150, the contact probe 161 and the pin 140 can be reliably positioned. Since the rigid contact probe 161 and the rigid pin 140 are in direct contact with each other, the electrical connection is obtained, so that the electrical connection can be reliably obtained and the conduction failure is eliminated. Further, the durability of the flexible wiring portion 30 is dramatically improved.
The inner diameter of the hole 151 of the insulating plate 150 is about 0.1 mm larger than the outer diameter of the pin 140, and a ring-shaped conducting wire portion 130 is disposed around the hole 151 as shown in FIG. .
[0022]
For example, the external adjustment device 160 supplies a current for electromagnetic driving to the electromagnetic driving unit 53 of the optical pickup OP of FIG. 6 or supplies a current to a laser light source (not shown). In addition, the external device 160 receives a signal from the photo detector PD shown in FIG. 6, for example.
[0023]
【The invention's effect】
  As described above, according to the present invention, when adjusting the optical pickup, it is possible to securely clamp the optical pickup so that it does not come off during conveyance. The present invention also providesDifferent typesElectrical connection can be made corresponding to a plurality of types of optical pickups, and electrical exchange with external equipment can be reliably performed.
[Brief description of the drawings]
FIG. 1 is a plan view showing a transport pallet according to the present invention.
FIG. 2 is a side view of the transport pallet of FIG.
FIG. 3 is another side view of the transport pallet of FIG. 1;
FIG. 4 is still another side view of the transport pallet of FIG.
5 is a bottom view of the transport pallet in FIG. 1. FIG.
FIG. 6 is a perspective view showing an example of an optical pickup clamped on a conveyance pallet.
7 is a diagram showing a structure of a first holding unit in FIG. 6;
8 is a view showing a structure of a second holding unit in FIG. 6;
FIG. 9 is an enlarged view of FIG. 2;
10 is a view showing a support structure in the vicinity of a reference shaft of part A in FIG. 9;
11 is a view showing a part of the support structure of part B in FIG. 9;
FIG. 12 is a perspective view illustrating an example of a structure of a flexible wiring portion on a conveyance pallet.
13 is a development view of the flexible wiring portion of FIG.
14 is a diagram showing a connection example of the first connection end portion of FIG. 13;
15 is a diagram showing a connection example of the second connection end portion of FIG. 13;
FIG. 16 is a plan view showing an insulating plate provided in the vicinity of the wiring plate.
FIG. 17 is a side view of an insulating plate.
FIG. 18 is a diagram showing the type of optical pickup.
FIG. 19 is a diagram showing another type of optical pickup.
FIG. 20 is a diagram showing an example of branching of conductive lines in the flexible wiring portion that is outside the scope of the present invention.
FIG. 21 is a diagram showing a cross-sectional structure of a flexible wiring portion in the branch example of FIG.
FIG. 22 is a diagram showing a state in which the flexible wiring portion is bent in a state where the interposed plate is not sandwiched.
FIG. 23 is a view showing a state where the flexible wiring portion is bent with the intervening plate sandwiched therebetween.
FIG. 24 is a diagram illustrating an example of a conductive line of a flexible wiring portion and a pin electrically connected to the conductive line.
FIG. 25 is a diagram showing a connection example of an insulating plate, a flexible wiring portion, a pin, and a contact probe of an external device.
FIG. 26 is a diagram illustrating an example of a contact portion of a flexible wiring portion.
FIG. 27 is a diagram showing an example of an optical pickup clamped on a conventional transport pallet.
FIG. 28 is a diagram illustrating a state in which another optical pickup is clamped with respect to the transport pallet.
[Explanation of symbols]
10 Transport pallet
12,14 Reference shaft
22 1st holding | maintenance part
24 2nd holding | maintenance part
30 Flexible wiring part
80 Contact area
81 First connection end
83 Second connection end
84 Intervening plate
120 conducting wire
130 Ring-shaped conducting wire part
140 pins
160 External equipment (power supply unit)
161 Contact probe
R direction in which the first holding portion presses the first shaft
R1 direction in which the second holding portion presses the second shaft

Claims (7)

To record information on an information recording medium, when adjusting the optical pickup used for reproducing the information of the information recording medium, in the transport pallet for transporting optical pickup,
A first holding unit for pressing and holding a first reference shaft that has passed through one end of the optical pickup;
A second holding portion for pressing and holding the second reference shaft that has passed through the other open end of the optical pickup;
A flexible wiring portion for electrically connecting to the optical pickup ,
The flexible wiring portion includes a contact portion connected to an external power supply portion, a first connection end portion for the first optical pickup branched at the contact portion, and a second connection for the second optical pickup. A transport pallet for an adjustment process of an optical pickup, characterized by having an end .   The conveyance pallet for the adjustment process of the optical pickup according to claim 1, wherein a direction in which the first holding unit presses the first shaft and a direction in which the second holding unit presses the second shaft are opposite to each other. The first connection end portion of the flexible wiring portion is led out and bent in the first direction of the contact portion, and the second connection end portion is led out and bent in the second direction of the contact portion. The conveying pallet for the adjustment process of the optical pickup according to claim 1, wherein the connecting end portion and the second connecting end portion are arranged so as to be substantially parallel to each other . The conveyance pallet for the adjustment process of the optical pickup according to claim 3, wherein the second connection end is bent via an intervening plate . The conveyance pallet for the adjustment process of the optical pickup according to claim 1 , wherein the conductive line of the flexible wiring portion includes a conductive pin for contacting a contact probe of an external power supply unit . The conveyance pallet for the adjustment process of the optical pickup according to claim 5 , wherein the pins of the flexible wiring portion are soldered to a ring-shaped conductive wire portion arranged in the middle of the conductive wire of the flexible wiring portion . The conveyance pallet for the adjustment process of the optical pickup according to claim 6, wherein ring-shaped conductive line portions of adjacent conductive lines are arranged at positions shifted from each other .

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