JPH11144258A - Position adjusting mechanism for read head in disk like recording medium reproducing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To adjust/operate from a direction intersecting with a surface direction of a disk like recording medium in the state supporting the disk like recording medium onto a disk table. SOLUTION: This position adjusting mechanism is provided with a spindle plate 4 arranged with a spindle motor 9 rotating the disk table 10 supporting the disk like recording medium 2 and a skew plate 5 movably supported in the radial direction of the disk like recording medium 2 supporting a read head 38 to the disk table and decantabiy/adjustably supported to the spindle plate 4. Then, the skew plate 5 is movably supported in the direction vertical to the moving direction of the read head for the spindle plate 4 and in the direction parallel to the surface direction of the disk like recording medium 2 supported to the disk table 10, that is, in the tangential direction, and is energized with moving force to one direction in the tangential direction, and an adjustment operation part 17 moving/adjusting the skew plate 5 in the tangential direction is provided on the spindle plate 4.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a read head position adjusting mechanism in a novel disk-shaped recording medium reproducing apparatus. More specifically, the present invention relates to a technique that enables an adjustment operation to be performed from a direction intersecting the surface direction of a disc-shaped recording medium while the disc-shaped recording medium is supported on a disk table.

[0002]

2. Description of the Related Art In a reproducing apparatus for a disk-shaped recording medium, for example, a reproducing apparatus for an optical disk or a magneto-optical disk, a recording track of the disk-shaped recording medium supported by a disk table and a reading head are used to read the disk-shaped recording medium. It is necessary to keep the angle made with the light beam irradiated on the recording head always constant irrespective of the position of the read head (from the innermost circumference to the outermost circumference of the recording area of the disk-shaped recording medium). .

For this purpose, the skew plate on which the read head is positioned with respect to the spindle plate on which the disk table is positioned is perpendicular to the direction of movement of the read head and in the plane of the disk-shaped recording medium supported by the disk table. The adjustment is performed by operating an adjustment operation unit that adjusts the movement of the skew plate in the tangential direction by keeping the skew plate movable in the parallel direction, that is, the tangential direction.

[0004] The position adjustment of the reading head is performed by:
Since the reproduction is performed while observing the reproduction output of the signal recorded on the test disk-shaped recording medium, the disk-shaped recording medium reproducing apparatus is assembled so that the reproduction output can be taken out, and the disk-shaped recording is performed. It is necessary to perform the operation with the medium mounted on the disk table.

Conventionally, an adjusting operation unit for adjusting the position of the reading head is operated by inserting an operating jig into the housing from the side of the housing. .

[0006]

By the way, in the position adjusting mechanism of the reading head in the conventional disk-shaped recording medium reproducing apparatus, an operation jig is inserted into the housing from the side of the housing to adjust the position. Since the operation is performed, it is necessary to provide an insertion opening for inserting an operation jig in the side wall of the housing, and external dust or the like enters the housing from the insertion opening. There was a problem.

[0007] In particular, when used as a recording medium in a personal computer or the like, since a cosmetic case that further covers the outside of the case is not used, intrusion of dust and the like from the above-mentioned insertion port becomes a serious problem.

Accordingly, an object of the present invention is to make it possible to perform an adjusting operation from a direction intersecting the surface direction of a disk-shaped recording medium while the disk-shaped recording medium is supported on a disk table. .

[0009]

In order to solve the above-mentioned problems, a position adjusting mechanism of a read head in a disk-shaped recording medium reproducing apparatus according to the present invention is provided with a spindle for rotating a disk table supporting a disk-shaped recording medium. A spindle plate on which a motor is disposed, and a skew plate on which a read head is supported movably in a radial direction of a disk-shaped recording medium supported on a disk table and supported on the spindle plate so as to be tiltable. The skew plate is supported movably in a direction perpendicular to the moving direction of the read head with respect to the spindle plate and in a direction parallel to the surface direction of the disk-shaped recording medium supported by the disk table, that is, in the tangential direction. And a moving force in one direction in the tangential direction is urged. An adjustment operation unit for moving and adjusting the rate in the tangential direction is provided on the spindle plate, and the operation unit of the adjustment operation unit is located outside the outer peripheral edge of the disk-shaped recording medium supported by the disk table so as to have a disc-like shape. The operation can be performed from a direction intersecting the surface direction of the recording medium.

Therefore, in the read head position adjusting mechanism of the disk recording medium reproducing apparatus of the present invention, the disk recording medium intersects in the plane direction of the disk recording medium while the disk recording medium is supported by the disk table. The read head can be adjusted in the tangential direction by performing an adjustment operation from the direction.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a read head position adjusting mechanism in a disc-shaped recording medium reproducing apparatus according to the present invention will be described below with reference to the accompanying drawings.

In the illustrated embodiment, the present invention is applied to a position adjusting mechanism of a read head in a recording and reproducing apparatus for a disk-shaped recording medium.

A disk-shaped recording / reproducing apparatus for a recording medium is provided with necessary components and members in a substantially sealed housing. And the above-mentioned housing is a housing main part 1 whose upper part and front face are open.
An upper cover (not shown) that covers the upper surface of the housing main portion 1, and a front panel (not shown) that covers the front surface of the housing main portion 1 and has an opening through which the disc-shaped recording medium 2 is inserted and removed. .

The disc-shaped recording medium 2 has a disc-like form, and includes, for example, an optical disc and a magneto-optical disc, and is used in the form of a CD (compact disc). As described above, it includes those that are used as they are, that is, what is called naked, and those that are used while being stored in a predetermined cartridge.

A base unit 3 is provided at the bottom of the housing main unit 1, and a disc-shaped recording medium holder (not shown), for example, a disc-shaped recording medium 2 is housed in a cartridge above the base unit 3. If so, a cartridge holder is provided.

The base unit 3 is rotatably supported at its rear end by the housing main part 1 and at its front end by moving up and down.

The base unit 3 includes a spindle plate 4
And a skew plate 5.

The spindle plate 4 is formed of sheet metal and has a rectangular shape that is long in the front-rear direction. A rectangular opening 6 that is long in the front-rear direction is formed in a portion excluding a peripheral portion thereof. Support shafts 7, 7 projecting laterally are formed on both sides of the rear end, and the support shafts 8, 7 are formed on both sides of the rear end of the housing main part 1. Is rotatably supported.

A spindle motor 9 is disposed substantially at the center of the front end of the spindle plate 4 in the left-right direction.
A disk table 10 is formed integrally with a rotor 9a of the spindle motor 9.

A skew plate 5 is supported on the spindle plate 4 so as to be tiltable. The skew plate 5 is formed of sheet metal and has a rectangular shape which is slightly smaller than the spindle plate 3 and is substantially long in the front-rear direction, and a rectangular opening 11 which is substantially long in the front-rear direction is formed at a portion excluding a peripheral portion thereof. Have been.

On both sides of a portion near the front end of the skew plate 5, support shafts 12, 12 projecting leftward are formed. At the position near the front end of the opening edge of the opening 6 of the spindle plate 4, support pieces 13, 13 projecting downward are formed, and the support pieces 13, 13 have support holes 13 a, 1.
3a are formed. The support shafts 12 of the skew plate 5 are supported by support holes 13 of the spindle plate 4.
Thus, the skew plate 5 is supported by the spindle plate 4 so as to be rotatable at the position near the front end and movably in the left-right direction.

A bias spring 14 is supported on the right side of the right support piece 13 on the lower surface of the spindle plate 4. The biasing spring 14 is formed of a leaf spring material, and has a mounting portion 14a and a pressing portion 14b bent downward from a left edge of the mounting portion 14a. Positioning projections 14c, 14
c is formed. Further, the pressing portion 14b is
d and a resilient portion 14e protruding leftward from the front end of the base portion 14d. Then, the positioning projections 14c, 14c of the mounting portion 14a are engaged with the positioning holes 15, 15 formed in the spindle plate 4, and the central portion thereof is attached to the spindle plate 4 by screws 16, whereby The shift spring 14 is supported by the spindle plate 4. Then, as shown in FIG.
Is supported by the spindle plate 4, the resilient portion 1
4e is the support shaft 12 of the right edge of the skew plate 5.
Is pressed to the left, and the skew plate 5 is biased to move to the left.

On the left side of the spindle plate 4, an adjusting operation section 17 for adjusting the position of the skew plate 5 in the left-right direction is provided. The adjusting operation section 17 has an adjusting plate 18 made of a sheet metal material having a plate shape that is substantially long in the front-rear direction. The adjusting plate 18 is rotatably supported at its front end on the upper surface side of the spindle plate 4. . The adjusting plate 18 has, at its rear end, a long hole 18a extending substantially in the left-right direction, and the long hole 18a is formed in an arc shape centering on a support point of the adjusting plate 18 to the spindle plate 4. A screw hole 19 is formed in the spindle plate 4 at a position corresponding to the long hole 18 a provided in the adjustment plate 18, and a fixing screw 20 is screwed into the screw hole 19 through the long hole 18 a of the adjustment plate 18. Have been.

A pressing piece 21 projecting downward is formed on the right side edge of the adjusting plate 18. The pressing piece 21 passes through a through hole 22 formed on the left side of the left supporting piece 13 of the spindle plate 4. It protrudes from the lower surface of the plate 4 and faces the tip of the support shaft 12 on the left side of the skew plate 5. The pressing piece 21 has its pressing surface, that is, the surface 21 facing the support shaft 12 within the adjustment range of the skew plate 5 in the tangential direction.
a is inclined so as to abut against the axis of the support shaft 12. Specifically, the pressing surface 21a is inclined such that the rear end is located to the left of the front end with respect to the axial direction of the support shaft 12.

Since the skew plate 5 is resiliently urged to move leftward by the biasing spring 14, the skew plate 5 is supported by the adjustment plate 18 on the left side. Is in a state of elastic contact with the pressing surface 21a of the pressing piece 21. As described above, the pressing surface 21a is inclined so as to abut against the axis of the support shaft 12 within the adjustment range of the skew plate 5, so that the support shaft 12 and the pressing surface 21a Of the support shaft 12, a force for moving the support shaft 12 backward is also applied to the support shaft 12, whereby the support shafts 12 and 12 of the skew plate 5 and the support holes 13 a of the spindle plate 4 are
13a, there is a clearance between the support shafts 12, 1
2 is resiliently abutted on one of the front and rear sides of the support holes 13a, 13a to prevent rattling therebetween.

At the position near the front end of the left side edge of the adjustment plate 18, the pressed edge 1 displaced leftward as going backward.
8b, a small circular reference hole 2 is formed in the spindle plate 4 at a position close to the pressed edge 18b.
3 are formed.

As described above, the adjusting operation section 17 includes the adjusting plate 18, the fixing screw 20, and the reference hole 23. Then, the operation section of the adjustment operation section 17, namely, the fixing screw 20
The reference hole 23 is located outside the outer peripheral edge of the disk-shaped recording medium 2 supported by the disk table 10 when viewed from above.

In order to adjust the position of the skew plate 5 with respect to the spindle plate 4 in the left-right direction,
This is done as follows.

An eccentric driver 24 is used for such adjustment. The eccentric driver 24 has a thin cylindrical reference pin 24a at the tip, and has an eccentric portion 24b adjacent to the reference pin 24a. The eccentric part 24b has an outer peripheral surface eccentric about the reference pin 24a.

Then, the reference pin 24a of the eccentric driver 24 is inserted into the reference hole 23 of the spindle plate 4, and the outer peripheral surface of the eccentric portion 24b is applied to the pressed edge 18b of the adjustment plate 18. In this state, if the eccentric driver 24 is rotated about the reference pin 24a, the pressed edge 18 of the adjustment plate 18 on the outer peripheral surface of the eccentric portion 24b is rotated.
The position of contact with b changes, that is, the distance from the center of rotation changes, whereby the position of the skew plate 5 relative to the spindle plate 4 in the left-right direction changes. Then, when the position of the skew plate 5 in the left-right direction with respect to the spindle plate 4 is determined, the position of the adjustment plate 18 is fixed by tightening the fixing screw 20. Thereby, the position of the skew plate 5 in the left-right direction with respect to the spindle plate 4 is fixed.

The operation section of the adjustment operation section 17 for performing such adjustment is, as described above, outside the disk-shaped recording medium 2 placed on the disk table 10 as viewed from above. It is located outside the periphery. Specifically, an operation unit necessary for performing the above adjustment, that is, the reference hole 2
The portion where 3 and the fixing screw 20 are located is located at the above position. Thus, such adjustment can be performed by an operation from above.

The adjustment operation section for adjusting the position of the skew plate 5 with respect to the spindle plate 4 in the left-right direction from above is not limited to the above-described one 17 but may be, for example, one shown in FIG. .

An adjustment piece 25 is provided on the spindle plate 4 so as to be movable in the left-right direction. The adjusting piece 25 has a pressing surface 25a which is a substantially vertical surface and a pressing surface 25b which is inclined upward.
And the pressing surface 25 a is in contact with the support shaft 12 of the skew plate 5. An adjusting screw 26 is screwed onto the spindle plate 4 so that the axial direction thereof is vertically oriented.
Abuts against the pressed surface 25b.

When the adjusting screw 25 is rotated,
The adjusting screw 25 moves upward or downward with respect to the spindle plate 4 depending on the direction of the rotation. As a result, the adjustment piece 25 at the tip of the adjustment screw 25 on the pressed surface 25b is
The position of contact with the tip of the spindle changes, and the adjustment piece 25 moves left or right, whereby the position of the skew plate 5 with respect to the spindle plate 4 in the left-right direction is adjusted.

A skew adjusting mechanism 27 is provided at the rear end of the spindle plate 4. A support plate 28 is erected along the rear edge of the opening 6 of the spindle plate 4,
A cam gear 29 is rotatably supported on the front side of the support plate 28. The peripheral portion of the cam gear 29 has a gear portion 29a.
An eccentric cam groove 29b having an arc shape eccentric with respect to the rotation center is formed on the front surface.

A motor 30 is mounted on the rear surface of the support plate 28, and a pinion gear 31 is fixed to a rotating shaft 30a projecting from the front side of the support plate 28, and the pinion gear 31 is connected to the cam gear 29. Gear portion 29a.

A sliding pin 32 projects rearward from the rear end of the skew plate 5, and the sliding pin 32 is slidably engaged with the eccentric cam groove 29b of the cam gear 29. I have.

A pressing spring 33 is provided at the rear end of the spindle plate 4. The presser spring 33 is made of a leaf spring material, and has an attachment portion 34 and a presser portion 35. The mounting portion 34 is substantially L-shaped when viewed from above,
Positioning protrusions 34a, 34a projecting downward are formed at both ends of the long part in the left-right direction, and the positioning protrusions 34a, 34a are fitted into positioning holes 36, 36 formed in the spindle plate 4. Further, the portion extending in the front-rear direction is fixed to the spindle plate 4 by being fixed to the spindle plate 4 with screws 37. The holding portion 35 has a shape extending in the left-right direction extending leftward from a portion protruding into the opening 6 of a portion extending in the front-rear direction of the mounting portion 34, and is inclined so that the tip is displaced downward. . The front end of the holding portion 35 is in elastic contact with the upper surface of the rear end of the skew plate 5. As a result, the skew plate 5 is resiliently biased to move in the direction in which the rear end is displaced downward, and the sliding pin 32 is located below the eccentric cam groove 29b of the cam gear 29. The skew plate 5 is prevented from rattling due to the clearance between the sliding pin 32 and the eccentric cam groove 29b.

The motor 30 is driven based on the result of skew detection by a skew sensor (not shown), whereby the cam gear 29 is rotated. When the cam gear 29 is rotated, the position of the eccentric cam groove 29b at which the sliding pin 32 of the skew plate 5 engages is changed.
The skew plate 5 is vertically rotated about a line connecting the support shafts 12, 12, and the disc-shaped recording medium placed on the disk table 10 is rotated. The angle to 2 is changed.

As described above, the skew plate 5 is supported on the spindle plate 4 so that the position in the left and right direction can be adjusted and the angle in the front and rear direction can be adjusted.

On the skew plate 5, a recording / reproducing head 38 for writing and reading signals on and from the disc-shaped recording medium 2 is supported movably in the front-rear direction. The recording / reproducing head 38 is an optical pickup when the target disk-shaped recording medium 2 is an optical disk or a magneto-optical disk.

A guide shaft 39 is supported on the skew plate 5 so as to bridge the right side of the opening 11 back and forth, and a lead screw is provided so as to bridge the left side of the opening 11 back and forth. 40 is rotatably supported. The right end of the carriage 41 is slidably supported by the guide shaft 39, and the left side is screwed to the lead screw 40. The necessary members and components are mounted on the carriage 41 to form the recording / reproducing head 38.

A notch 42 is formed at the rear end of the left edge of the opening 11 of the skew plate 5, and the coreless motor 43 is positioned in the notch 42 so that the axial direction thereof extends in the front-rear direction. It is supported by the skew plate 5.

A pinion gear 44 is fixed to a rotating shaft 43a of the coreless motor 43.
4 is meshed with a flat gear 46 fixed to the rear end of the lead screw 40 via an intermediate gear 45 rotatably supported by the skew plate 5. When the coreless motor 43 is driven, the lead screw 40 is rotated through a gear train including the gears 44, 45, and 46.
That is, the disk-shaped recording medium 2 placed on the disk table 10 is moved in the radial direction.

By rotating the adjusting plate 18 in the adjusting operation section 17, the skew plate 5 is moved in the left-right direction with respect to the spindle plate 4, so that the disc-shaped plate mounted on the disk table 10 is moved. The radial direction of the recording medium 2 and the recording / reproducing head 38, more specifically, when it is an optical pickup, can be adjusted so that the movement trajectory of the objective lens 47 coincides when viewed from above. Is driven, the skew between the light beam emitted from the objective lens 47 and the disk-shaped recording medium 2 placed on the disk table 10 is adjusted.

[0046]

As is apparent from the above description, the position adjusting mechanism of the read head in the disk-shaped recording medium reproducing apparatus of the present invention comprises a spindle motor for rotating a disk table supporting the disk-shaped recording medium. A spindle plate, and a skew plate in which the read head is supported movably in the radial direction of the disk-shaped recording medium supported by the disk table and supported by the spindle plate so as to be tiltable, The skew plate is supported movably in a direction perpendicular to the moving direction of the read head with respect to the spindle plate and in a direction parallel to the surface direction of the disk-shaped recording medium supported by the disk table, that is, in the tangential direction. The moving force in one direction in the tangential direction is urged,
An adjustment operation unit for moving and adjusting the skew plate in the tangential direction is provided on the spindle plate, and the operation unit of the adjustment operation unit is positioned outside the outer peripheral edge of the disc-shaped recording medium supported by the disk table, thereby forming a circle. It is characterized in that it can be operated from a direction intersecting the surface direction of the plate-shaped recording medium.

Therefore, in the position adjusting mechanism of the read head in the disc-shaped recording medium reproducing apparatus of the present invention, the disc-shaped recording medium intersects in the plane direction of the disc-shaped recording medium while being supported by the disk table. By performing an adjustment operation from the direction, the position of the reading head in the tangential direction can be adjusted. Therefore, there is no need to provide an insertion hole for inserting an adjustment jig on the side surface of the housing for such adjustment,
Intrusion of dust and the like from the outside can be completely blocked.

According to the second aspect of the present invention, the skew plate is provided with a support shaft extending in the tangential direction, and the support shaft is inserted into a support hole provided in the spindle plate so that the skew plate is moved. In addition to supporting the spindle plate movably in the tangential direction and operating the adjustment operation unit to press the support shaft to move the skew plate in the tangential direction. Most of the force acts as a force for moving the skew plate in the tangential direction, so that the adjusting operation can surely move the skew plate, and the reliability of the adjusting operation is guaranteed.

Further, in the invention described in claim 3, the adjusting operation section has a pressing piece for pressing the support shaft, and the pressing surface of the pressing piece has a pressing surface within the adjustable range. Contact with the support shaft while being inclined with respect to the axial direction of the support shaft, so that the reliability of the adjustment operation is ensured, and there is no clearance between the support shaft and the support hole through which the support shaft is inserted. Even so, the support shaft is pressed against one side of the support hole, and rattling of the support shaft in the support hole is prevented.

Further, according to the invention described in claim 4 and claim 5, the skew plate is rotated by rotating the spindle plate in a direction parallel to the moving direction of the skew plate, thereby rotating the skew plate. And a fixing screw for fixing the position of the rotating member to the spindle plate by moving the skew plate in the tangential direction by rotating the rotating member. After the adjustment, the rotation member is fixed to the spindle plate by the fixing screw, so that the fixing after the adjustment is reliably performed.

In the invention described in claim 6, the rotating member has a pressing piece for pressing the support shaft, and the pressing piece has a pressing surface whose support surface is within the adjustable range. Since the shaft is brought into contact with the shaft while being inclined with respect to the axial direction of the shaft, fixation after the adjustment is reliably performed, and rattling in the support hole of the shaft is prevented.

It should be noted that the shapes and structures of the respective parts shown in the above-described embodiments are merely examples of the specific embodiments to be carried out when carrying out the present invention, and the technical scope of the present invention is thereby described. Should not be interpreted restrictively.

[Brief description of the drawings]

FIG. 1 shows an embodiment of the present invention together with FIG. 2 to FIG. 10, and FIG. 1 is a plan view of a main part.

FIG. 2 shows a base unit together with FIG. 3;
This drawing is a plan view partially omitted.

FIG. 3 is a left side view partially omitted.

FIG. 4 shows an adjustment operation unit together with FIGS. 5 and 6, and FIG. 4 is an enlarged plan view.

FIG. 5 is an enlarged exploded perspective view.

FIG. 6 is an enlarged sectional view showing a state in which an adjustment operation is being performed.

FIG. 7 is a schematic sectional view showing another example of the adjustment operation unit.

FIG. 8 is an enlarged bottom view of the skew plate shifting portion.

FIG. 9 is an enlarged exploded perspective view of a skew plate shifting portion.

FIG. 10 is an enlarged front view of a skew adjustment mechanism.

[Description of Signs] 2 ... Disc-shaped recording medium, 4 ... Spindle plate, 5 ... Skew plate, 9 ... Spindle motor, 10 ... Disk table, 12 ... Support shaft, 13a ... Support hole, 17 ... Adjustment operation unit, 18 ... Adjustment plate (rotating member), 20... Fixing screw (operation part), 21.
... Reference holes (operation unit), 38 ... Recording / reading head (reading head)

Claims (6)

[Claims] A spindle plate provided with a spindle motor for rotating a disk table supporting the disk-shaped recording medium; and a read head movably in a radial direction of the disk-shaped recording medium supported by the disk table. A skew plate supported on the spindle plate so as to be tiltable and adjustable, wherein the skew plate is perpendicular to the moving direction of the read head with respect to the spindle plate and supported by a disk table. The direction parallel to the plane direction of
The spindle plate is provided so as to be movable in the tangential direction and is urged to move in one direction in the tangential direction. The spindle plate has an adjusting operation section for moving and adjusting the skew plate in the tangential direction. The operation unit of the adjustment operation unit is located outside the outer peripheral edge of the disk-shaped recording medium supported by the disk table, and can be operated from a direction intersecting the surface direction of the disk-shaped recording medium. A position adjusting mechanism of a reading head in a disc-shaped recording medium reproducing apparatus, characterized by: 2. The skew plate is provided with a support shaft extending in the tangential direction, and the support shaft is inserted into a support hole provided in the spindle plate to support the skew plate on the spindle plate movably in the tangential direction. 2. The read head according to claim 1, wherein the skew plate is moved in the tangential direction by pressing the support shaft by an operation of the adjustment operation unit. Position adjustment mechanism. 3. The adjusting operation section has a pressing piece for pressing the support shaft, and the pressing surface has a pressing surface inclined with respect to the support shaft in the axial direction of the support shaft within an adjustable range. The position adjusting mechanism of the read head in the disc-shaped recording medium reproducing device according to claim 2, wherein the contact is made in a state where the contact is made. 4. A rotating member for rotating the skew plate in the tangential direction by rotating the spindle plate in a direction parallel to the moving direction of the skew plate, and for rotating the skew plate. A fixing screw for fixing the position to the plate is provided, the skew plate is moved in the tangential direction by rotating the rotating member, the position is adjusted, and then the rotating member is fixed to the spindle plate by the fixing screw. 2. The position adjusting mechanism of a read head in a disc-shaped recording medium reproducing apparatus according to claim 1, wherein 5. A rotating member for rotating the spindle plate in a direction parallel to the direction of movement of the skew plate and for rotating the spindle by pressing the support shaft of the skew plate in the tangential direction. A fixing screw for fixing the position of the moving member to the spindle plate is provided, and the rotating member is rotated to move the skew plate in the tangential direction to adjust the position, and then the rotating member is fixed to the spindle plate by the fixing screw. 3. The position adjusting mechanism of a read head in a disk-shaped recording medium reproducing apparatus according to claim 2, wherein the position is fixed to the position. 6. The rotating member has a pressing piece for pressing the support shaft, and the pressing surface has a pressing surface inclined with respect to the support shaft in the axial direction of the support shaft within an adjustable range. 6. The position adjusting mechanism of a read head in a disk-shaped recording medium reproducing device according to claim 5, wherein the contact is made in a state where the contact is made.