JP3090701U - Disc player - Google Patents

Abstract

(57) [Summary] [Purpose] To have a simple structure, a small number of parts, and a low production cost. A guide shaft is arranged on one side edge of a center through hole of a chassis, and a guide plate integrated with the chassis is arranged on the other side edge of the center through hole. A pair of left and right arms 15a, 1
A guide hole 7a penetrating through one arm 15a is movably fitted to the guide shaft 5a, and an outwardly expanding tapered groove 16 formed in the other arm 15b is used as a guide. The optical pickup 6 is movably fitted to the side edge 17a of the plate 17, and the optical pickup 6 is
The information recorded on the disk D is read by projecting a laser beam from the optical pickup 6 onto the disk D while moving forward and backward along the a and the guide plate 17.

Description

[Detailed description of the invention]

[0001]

[Technical field to which the invention belongs]

 The present invention relates to a disc player for reproducing, recording, or erasing an optical disc, abbreviated as a CD or MD.

[0002]

[Prior art]

 Conventionally, an example of a disk player is disclosed in Japanese Utility Model Application Laid-Open No. 63-173717. As shown in FIGS. 6 and 7, a spindle motor 2 is fixed to a front end 1a of a steel plate chassis 1 and a turntable 4 is fixed to a drive shaft 2a of the spindle motor 2. A pair of left and right guide shafts 5a and 5b are juxtaposed along the radial direction of the turntable 4 on both side edges of the central through hole 3 penetrating the optical pickup 6 through the respective guide shafts 5a and 5b. The provided guide holes 7a and 7b are fitted so as to be able to move forward and backward a and b.

The guide shafts 5 a and 5 b are locked to the chassis 1 by pressing both ends of the guide shafts 5 a and 5 b against the chassis 1 with leaf springs 8.

In the above configuration, the disk D is set on the turntable 4 and the spindle motor 2 is driven to rotate the disk D via the turntable 4, and the optical pickup is moved along both guide shafts 5 a and 5 b. The laser beam 6 is moved forward and backward a and b, and information recorded on the disk D is read by projecting laser light from the optical pickup 6 onto the disk D.

A cam shaft 9 parallel to one of the guide shafts 5 a on the chassis 1, a pair of cams 10 fixed to both ends of the cam shaft 9 and abutting against the lower surface of the one guide shaft 5 a, A worm wheel 11 fixed to one end of the worm wheel 11 and a worm gear 12 meshing with the worm wheel 11 are provided with an inclination adjusting mechanism 13.

In the above configuration, the procedure for adjusting the tilt angle of the optical pickup 6 before shipment from the factory will be described. By rotating the worm gear 12 forward and backward, the two cams 10 are rotated up and down via the worm wheel 11 and the cam shaft 9. As a result, one of the guide shafts 5a contacting both cams is moved up and down, and the optical pickup 6 is tilted about the other guide shaft 5b. At the same time, a laser beam is projected from the optical pickup 6 onto the adjustment disk D set on the turntable 4, and the tilt angle of the optical pickup 6 is observed by a measuring instrument for measuring the reflected light, and the optical pickup is taken up. When 6 reaches the proper tilt position, the rotation of the worm gear 12 is stopped.

[0007]

[Problems to be solved by the invention]

 In the above configuration, two guide shafts 5a and 5b are used to move the optical pickup 6 forward and backward a and b, and both ends of the guide shafts 5a and 5b are pressed by the leaf springs 8, so that the structure is complicated. Therefore, the number of parts is large and the production cost is high. Further, the chassis 1 is formed by pressing a steel plate, and the processing cost is high. Further, the structure of the inclination adjusting mechanism 13 of the optical pickup 6 (the camshaft 9, the cam 10, the worm wheel 11, and the worm gear 12) is complicated, and the number of parts is large, so that the manufacturing cost is further increased.

The present invention has been made in view of the above-mentioned drawbacks, and has as its object to provide a disk player having a simple structure, a small number of parts, and a low manufacturing cost.

[0009]

[Means for Solving the Problems]

 The invention according to claim 1 is characterized in that a spindle motor for rotating a turntable is arranged at an end of a steel plate chassis, and a pair of left and right is provided along both sides of a central through hole formed in the chassis along a radial direction of the turntable. Guide shafts are juxtaposed, and guide holes penetrating through both sides of the optical pickup are fitted to the respective guide shafts so as to be able to move forward and backward. A disc is set on the turntable and a spindle motor is driven. By rotating the disk through the turntable, the optical pickup is moved forward and backward along both guide shafts, and the laser beam is projected from the optical pickup onto the disk so that the information recorded on the disk is read. In the disc player described above, a synthetic resin chassis is used in place of the steel plate chassis. In addition, the chassis and a motor support made of a synthetic resin of a spindle motor are integrally formed, and one of the two guide shafts is used as it is, and the other guide shaft is used in place of the other guide shaft. A pair of left and right arms are integrally protruded from the synthetic resin housing of the optical pickup, and are penetrated through one of the arms. A guide hole is movably fitted to the guide shaft, and an outwardly expanding tapered groove formed in the other arm portion is movably fitted to a side edge of the guide plate. .

According to the above configuration, the optical pickup is supported by the guide shaft and the guide plate formed integrally with the chassis so as to be able to move forward and backward, and one guide shaft is omitted as compared with the prior art. Because of the omission, the structure is simple, the number of parts is small, and the production cost is low.

[0011] Furthermore, when the outer divergent tapered groove formed in the other arm portion of the housing of the optical pickup is fitted to the side edge of the guide plate, the opening width of the groove is large. Can be easily fitted to the side edge of the guide plate, and the width of the deep end face of the groove is small, so that both tapered surfaces of the groove contact or approach the side edge of the guide plate. Therefore, the gap between both the tapered surfaces of the concave groove and the guide plate can be set to be extremely small, whereby the optical pickup can be smoothly moved forward and backward along the guide plate.

Further, since the chassis and the motor support, which are conventionally separate parts, are integrally formed of synthetic resin, the number of parts is reduced, and mass production can be performed at low cost.

[0013] According to a second aspect of the present invention, a spindle motor for rotating a turntable is disposed at an end of a steel plate chassis, and both side edges of a central through hole penetrating the chassis are formed along a radial direction of the turntable. A pair of left and right guide shafts are arranged side by side, and guide holes penetrating through both sides of the optical pickup are fitted to the respective guide shafts so as to be able to move forward and backward. A disc is set on the turntable and a spindle motor is driven. As a result, the disk is rotated via the turntable, the optical pickup is moved forward and backward along the two guide shafts, and information recorded on the disk is projected by projecting laser light from the optical pickup onto the disk. In a disk player adapted to read, a chassis made of synthetic resin is used instead of the chassis made of steel plate. And the chassis and a motor support made of a synthetic resin for a spindle motor are integrally formed. One of the two guide shafts is used as it is, and the other guide shaft is used for the other guide shaft. Instead, a guide plate that is formed integrally with the chassis and extends in the forward / rearward direction is used, and a pair of left and right arms is integrally protruded from a synthetic resin housing of the optical pickup. The penetrated guide hole is movably fitted to the guide shaft, and a screw hole is formed in the other arm in a direction substantially perpendicular to the forward / rearward movement direction, and a synthetic resin screw is inserted into the screw hole. The member is screwed together, and a tapered groove extending outward is formed in an annular shape on the outer peripheral surface of a cylindrical portion formed concentrically and integrally with the screw member, and the tapered groove extending outward is formed on the side of the guide plate. On the edge It is characterized by being engaged rotatably fitted and.

According to the above configuration, the optical pickup is supported by the guide shaft and the guide plate integrally formed on the chassis so as to be able to move forward and backward, and one guide shaft is omitted as compared with the related art. Because of the omission, the structure is simple, the number of parts is small, and the production cost is low.

[0015] Further, a screw member screwed into a screw hole formed in the housing of the optical pickup, and a cylindrical portion formed concentrically and integrally with the screw member form an inclination adjusting mechanism of the optical pickup. The structure is simple and the production cost is low.

Further, by simply rotating the screw member in the normal and reverse directions, the outwardly expanding tapered groove formed on the outer peripheral surface of the cylindrical portion is pressed against the guide plate, and the optical pickup is tilted about the guide shaft. , The inclination can be easily adjusted.

Further, when fitting the outer divergent tapered groove to the side edge of the guide plate, the groove has a large opening width, so that the groove is easily fitted to the side edge of the guide plate. And the width of the inner end surface of the groove is small, and both tapered surfaces of the groove contact or approach the side edges of the guide plate. The gap between the optical pickup and the guide plate can be set to be extremely small, so that the optical pickup can be smoothly moved back and forth along the guide plate.

In addition, since the chassis and the motor support, which are conventionally separate parts, are integrally formed of synthetic resin, the number of parts is reduced, mass production can be performed at low cost, and the screw member can be formed of synthetic resin at low cost. Can be mass-produced.

According to a third aspect of the present invention, a spindle motor for rotating a turntable is disposed at an end of a chassis, and a pair of left and right is disposed along both sides of a central through hole formed in the chassis along a radial direction of the turntable. An optical pickup is installed on both guide members so that the optical pickup can move forward and backward. A disc is set on the turntable, and a spindle motor is driven to drive the disc through the turntable. A disc player that rotates an optical pickup to move the optical pickup forward and backward along both guide members and projects laser light from the optical pickup onto the disc to read information recorded on the disc. One of the guide members is a guide shaft, and the other is the guide shaft. A pair of left and right arms are integrally formed on the housing of the optical pickup, and a guide hole penetrating through one of the arms is formed on the guide shaft. It is characterized in that it is movably fitted, and an outer widened tapered groove formed in the other arm is movably fitted to a side edge of the guide plate.

According to the above configuration, the optical pickup is supported so as to be able to move forward and backward by the guide shaft and the guide plate formed integrally with the chassis, and one guide shaft is omitted as compared with the prior art. Because of the omission, the structure is simple, the number of parts is small, and the production cost is low.

Further, when fitting the outer divergent tapered groove formed on the other arm portion of the housing of the optical pickup to the side edge of the guide plate, the opening width of the groove is large. Can be easily fitted to the side edge of the guide plate, and the width of the deep end face of the groove is small, so that both tapered surfaces of the groove contact or approach the side edge of the guide plate. Therefore, the gap between both the tapered surfaces of the concave groove and the guide plate can be set to be extremely small, whereby the optical pickup can be smoothly moved forward and backward along the guide plate.

According to a fourth aspect of the present invention, in the device of the third aspect, a screw hole is provided in the other arm portion in a direction substantially perpendicular to a forward / reverse direction, and a screw member is provided in the screw hole. The outer peripheral surface of the cylindrical portion which is screwed and concentrically formed integrally with the screw member is characterized in that the outwardly extending tapered groove is formed in an annular shape.

According to the above configuration, the screw member screwed into the screw hole formed in the housing of the optical pickup, and the cylindrical portion formed concentrically and integrally with the screw member form the tilt angle adjustment mechanism of the optical pickup. The structure is simple and the production cost is low.

Further, by simply rotating the screw member in the forward and reverse directions, the outwardly expanding tapered groove formed on the outer peripheral surface of the cylindrical portion is pressed against the guide plate, and the optical pickup is tilted about the guide shaft. , The inclination can be easily adjusted.

According to a fifth aspect of the present invention, in the device of the third or fourth aspect, the chassis and the motor support of the spindle motor are integrally formed of a synthetic resin made of polyphenylene ether. It is characterized by:

According to the above configuration, the chassis and the motor support, which have been separate parts in the related art, are integrally formed of a synthetic resin. Further, since polyphenylene ether is used as the synthetic resin, a chassis and a motor base having well-balanced electrical characteristics, flame retardancy, heat resistance, dimensional stability and moldability can be formed.

The invention according to claim 6 is the invention according to claim 4 or 5, wherein the screw member is formed of a synthetic resin made of polyacetal.

According to the above configuration, the screw member can be mass-produced at low cost with a synthetic resin, and since polyacetal is used as the synthetic resin, fatigue life, low creep, dimensional stability, and rigidity are achieved. It is possible to form a screw member having a good balance such as low friction and the like.

[0029]

[Embodiment of the invention]

 1 and 2 show a disc player according to a first embodiment of the present invention. A pair of left and right arms 15a and 15b are integrally formed on a synthetic resin housing 15 of the optical pickup 6. As shown in FIGS. The guide hole 7a penetrating the one arm portion 15a is movably fitted to the guide shaft 5a, and the concave groove 16 formed in the other arm portion 15b of the housing 15 is formed integrally with the chassis 1. It is movably fitted to a side edge 17a of a guide plate 17 extending in the a and b directions. 6 and 7 that are the same as those shown in FIGS. 6 and 7 are denoted by the same reference numerals, and description thereof is omitted.

According to the above configuration, the optical pickup 6 is supported by the guide shaft 5a and the guide plate 17 integrally formed on the chassis 1 so as to be able to move forward and backward a and b. Since one of the guide shafts 5b (the guide shaft 5b) is omitted, the structure is simplified, the number of parts is reduced, and the manufacturing cost is reduced by the omitted portion.

As shown in FIG. 3, the chassis 1 and the motor support 18 of the spindle motor 2 are integrally formed of a synthetic resin made of polyphenylene ether. Is molded integrally with synthetic resin, which reduces the number of parts and enables mass production at low cost.Polyphenylene ether also improves electrical properties, flame retardancy, heat resistance, dimensional stability and moldability. A well-balanced chassis 1 and motor support 18 can be formed.

As shown in FIG. 4, the concave groove 16 has an opening width d1 set to be larger than the thickness t of the guide plate 17 and a width d2 of the rear end face thereof is set to be larger than the thickness t of the guide plate 17. Is also set to be small, so that it is formed in an outwardly expanding tapered shape.

The procedure for mounting the optical pickup 6 will be described. A boss 19 (see FIG. 1) in which one end of the guide shaft 5a is integrally protruded from the chassis 1 after the guide shaft 5a is inserted into the guide hole 7a. As shown in FIG. 4 (a), the outwardly expanding tapered concave groove 16 is opposed to the side edge 17a of the guide plate 17 from diagonally above, and as shown in FIG. Is pressed down to fit the outwardly expanding tapered concave groove 16 into the side edge 17a of the guide plate 17, and the other end of the guide shaft 5a is fixed to the chassis 1 with the screw 20 (see FIG. 1).

According to the above configuration, when the outwardly expanding tapered groove 16 is fitted to the side edge 17a of the guide plate 17, the opening width d1 of the groove 16 is large. 17 can be easily fitted to the side edge 17a, and the width d2 of the inner end face of the concave groove 16 is small, and both tapered surfaces 16a and 16b of the concave groove 16 are , The gap α between both the tapered surfaces 16a, 16b of the concave groove 16 and the guide plate 17 can be set extremely small. A and b can be smoothly moved forward and backward along the line.

In FIGS. 1 and 2, reference numeral 22 denotes a forward / reverse drive mechanism, which drives a pinion 24 meshing with a rack 23 formed on one arm 15 a of the housing 15 and a drive motor 25 fixed to the chassis 1. A drive gear 26 fixed to a shaft is interlocked and connected by an intermediate gear mechanism 27. By driving the drive motor 25 forward and reverse, the drive gear 26, the intermediate gear mechanism 27, the pinion 24, and the rack 23 are connected. The optical pickup 6 can be moved forward and backward a and b via the optical pickup 6.

In FIG. 1, reference numeral 29 denotes a support frame projecting from the rear side of the chassis 1 and connected to a frame (not shown) via an elastic body 30. A cam shaft 31 protrudes from the front end face of the chassis 1 and is fitted in a cam groove 32a of a cam lever 32 movable in left and right directions c and d. By moving, the chassis 1 is raised around the elastic body 302 through the cam groove 32a and the cam shaft 31, and the turntable 4 is fitted to the disk D on the tray (not shown), and vice versa. Then, by moving the cam lever 32 in the left direction d, the chassis 1 is lowered around the elastic body 302 via the cam groove 32a and the cam shaft 31 to separate the turntable 4 from the disk D.

As shown in FIG. 2, an objective lens OL and a collimator lens QWP are provided at one end of the housing 15, and a light receiving element PD made of a photodiode is provided at the other end of the housing 15. A half mirror HM and a semiconductor laser LD are disposed in the housing 15, and a laser beam is projected from the semiconductor laser LD onto the disk D via the half mirror HM, the collimator lens QWP, and the objective lens OL, The reflected light is received by the light receiving element PD, and the information recorded on the disk D is read based on the received light signal.

FIG. 5 shows a second embodiment of the present invention, in which a housing 15 is provided with an inclination adjusting mechanism 13, and the inclination adjusting mechanism 13 is provided on the other arm of the housing 15. The portion 15b has a synthetic resin screw member 35 made of polyacetal which is screwed into a screw hole 34 penetrating in a direction O substantially perpendicular to the forward and backward a and b directions, and is concentric with the screw member 35. A tapered concave groove 16 is formed in an annular shape on the outer peripheral surface of a cylindrical portion 36 integrally formed with the cylindrical portion 36. Structures other than those described above are almost the same as those of the first embodiment shown in FIGS. 1 to 4, and therefore, the same portions are denoted by the same reference characters and description thereof will be omitted.

In the above configuration, the procedure for adjusting the tilt angle of the optical pickup 6 before shipment from the factory will be described. By rotating the screw member 35 in the forward and reverse directions, the outwardly expanding tapered groove 16 is formed into the side edge 17 a of the guide plate 17. , The optical pickup 6 is tilted e and f around the guide shaft 5a, and at the same time, the laser light is projected from the optical pickup 6 onto the adjustment disk D set on the turntable 4, and the reflected light The tilt angle of the optical pickup 6 is observed by a measuring device for measuring the tilt angle, and when the optical pickup 6 reaches an appropriate tilt position, the rotation of the screw member 35 is stopped.

According to the above-described configuration, the screw member 35 screwed into the screw hole 34 of the housing 15 and the cylindrical portion 36 formed concentrically with the screw member 35 integrally form the inclination adjusting mechanism 13 of the optical pickup 6. Are formed, the structure is simple and the production cost is low.

Further, by simply rotating the screw member 35 forward and backward, the outwardly expanding tapered groove 16 formed on the outer peripheral surface of the cylindrical portion 36 is pressed against the guide plate 17, and the optical pickup 6 is rotated around the guide shaft 5 a. Can be easily adjusted by tilting e and f.

Further, the screw member 35 having a good balance among fatigue life, low creep, dimensional stability, rigidity and low friction can be formed by using polyacetal.

[0043]

[Effect of the invention]

 According to the first aspect of the present invention, the optical pickup is supported by the guide shaft and the guide plate formed integrally with the chassis so as to be able to move forward and backward, and one guide shaft is omitted as compared with the related art. Because of the omission, the structure is simple, the number of parts is reduced, and the production cost is low.

Further, when fitting the outer divergent tapered groove formed on the other arm portion of the housing of the optical pickup to the side edge of the guide plate, the groove has a large opening width. Can be easily fitted to the side edge of the guide plate, and the width of the deep end face of the groove is small, so that both tapered surfaces of the groove contact or approach the side edge of the guide plate. Therefore, the gap between both the tapered surfaces of the concave groove and the guide plate can be set extremely small, whereby the optical pickup can be smoothly moved forward and backward along the guide plate.

Furthermore, since the chassis and the motor support, which are conventionally separate parts, are integrally formed of a synthetic resin, the number of parts is reduced, and mass production can be performed at low cost.

According to the second aspect of the present invention, the optical pickup is supported by the guide shaft and the guide plate formed integrally with the chassis so as to be able to move forward and backward, and one guide shaft is omitted as compared with the related art. Therefore, the structure is simple, the number of parts is small, and the manufacturing cost is low because of the omission.

Further, a screw member screwed into a screw hole formed in the housing of the optical pickup and a cylindrical portion formed concentrically and integrally with the screw member form an inclination adjusting mechanism of the optical pickup. The structure is simple and the production cost is low.

Further, by simply rotating the screw member in the normal and reverse directions, the outwardly expanding tapered groove formed on the outer peripheral surface of the cylindrical portion is pressed against the guide plate, and the optical pickup is tilted about the guide shaft. , The inclination can be easily adjusted.

Further, when fitting the outer divergent tapered groove to the side edge of the guide plate, since the opening width of the groove is large, the groove is easily fitted to the side edge of the guide plate. And the width of the inner end surface of the groove is small, and both tapered surfaces of the groove contact or approach the side edges of the guide plate. The gap between the optical pickup and the guide plate can be set to be extremely small, so that the optical pickup can be smoothly moved back and forth along the guide plate.

In addition, since the chassis and the motor support, which are conventionally separate parts, are integrally formed of synthetic resin, the number of parts is reduced, mass production can be performed at low cost, and the screw member can be formed of synthetic resin at low cost. Can be mass-produced.

According to the third aspect of the present invention, the optical pickup is supported by the guide shaft and the guide plate integrally formed on the chassis so as to be able to move forward and backward, and one guide shaft is omitted as compared with the related art. Therefore, the structure is simple, the number of parts is small, and the manufacturing cost is low because of the omission.

Further, when fitting the outer divergent tapered groove formed on the other arm portion of the housing of the optical pickup to the side edge of the guide plate, the groove has a large opening width. Can be easily fitted to the side edge of the guide plate, and the width of the deep end face of the groove is small, so that both tapered surfaces of the groove contact or approach the side edge of the guide plate. Therefore, the gap between both the tapered surfaces of the concave groove and the guide plate can be set to be extremely small, whereby the optical pickup can be smoothly moved forward and backward along the guide plate.

According to the invention of claim 4, the optical pickup is formed by the screw member screwed into the screw hole formed in the housing of the optical pickup and the cylindrical portion formed concentrically with the screw member. Since the inclination adjusting mechanism is formed, the structure is simple and the manufacturing cost is low.

Further, by merely rotating the screw member in the normal and reverse directions, the outwardly expanding tapered groove formed on the outer peripheral surface of the cylindrical portion is pressed against the guide plate, and the optical pickup is tilted about the guide shaft. , The inclination can be easily adjusted.

According to the fifth aspect of the present invention, since the chassis and the motor support, which are conventionally separate parts, are integrally formed of synthetic resin, the number of parts is reduced and mass production can be performed at low cost. . Further, since polyphenylene ether is used as the synthetic resin, a chassis and a motor base having a good balance of electrical characteristics, flame retardancy, heat resistance, dimensional stability, and moldability can be formed.

According to the invention of claim 6, the screw member can be mass-produced at low cost with a synthetic resin, and since polyacetal is used as the synthetic resin, fatigue life, low creep, A screw member having a good balance of dimensional stability, rigidity and low friction can be formed.

[Brief description of the drawings]

FIG. 1 is a plan view showing a disc player according to a first embodiment of the present invention.

FIG. 2 is a view as viewed in the direction of arrows AA in FIG. 1;

FIG. 3 is a perspective view of the chassis.

FIGS. 4A and 4B are enlarged longitudinal sectional views of a main part showing a procedure for fitting an outwardly expanding tapered concave groove to a side edge of a guide plate.

FIG. 5 is an enlarged vertical sectional view showing a main part of a disc player according to a second embodiment of the present invention.

FIG. 6 is a plan view showing a conventional example.

FIG. 7 is a front view of the main part.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Chassis 2 Spindle motor 3 Chassis center through-hole 4 Turntable 5a, 5b Guide shaft 6 Optical pickup 7a, 7b Guide hole 13 Inclination adjustment mechanism 15a One arm part of a housing 15b The other arm part of a housing 16 Externally tapered shape Concave groove 17 Guide plate 18 Motor support base 34 Screw hole 35 Screw member 36 Cylindrical part D disk a, b Forward and backward

Claims (6)

[Utility model registration claims] 1. A turntable rotating spindle motor is disposed at an end of a steel plate chassis, and a pair of left and right guide shafts are arranged along both sides of a center through hole penetrating through the chassis along a radial direction of the turntable. Guide holes penetrating through both side portions of the optical pickup are fitted to the respective guide shafts so as to be able to move forward and backward. A disc player that rotates the disc to move the optical pickup forward and backward along both guide shafts, and that reads information recorded on the disc by projecting laser light from the optical pickup onto the disc.
A synthetic resin chassis is used in place of the steel plate chassis, and the chassis and a synthetic resin motor support of the spindle motor are integrally formed, and one of the two guide shafts is used as it is. In addition, instead of the other guide shaft, a guide plate that is formed integrally with the chassis and extends along the forward / rearward movement direction is used, and a pair of left and right arms are integrally provided on the synthetic resin housing of the optical pickup, and On the other hand, a guide hole penetrating through the arm portion is movably fitted to the guide shaft, and an outwardly expanding tapered groove formed in the other arm portion is movably fitted to a side edge of the guide plate. A disc player characterized by: 2. A turntable rotating spindle motor is disposed at an end of a steel plate chassis, and a pair of left and right guide shafts are arranged along both sides of a central through hole penetrating through the chassis along a radial direction of the turntable. Guide holes penetrating through both side portions of the optical pickup are fitted to the respective guide shafts so as to be able to move forward and backward. A disc player that rotates the disc to move the optical pickup forward and backward along both guide shafts, and that reads information recorded on the disc by projecting laser light from the optical pickup onto the disc.
A synthetic resin chassis is used in place of the steel plate chassis, and the chassis and a synthetic resin motor support of the spindle motor are integrally formed, and one of the two guide shafts is used as it is. In addition, instead of the other guide shaft, a guide plate that is formed integrally with the chassis and extends along the forward / rearward movement direction is used, and a pair of left and right arms are integrally provided on the synthetic resin housing of the optical pickup, and On the other hand, a guide hole penetrating through the arm portion is movably fitted to the guide shaft, and a screw hole is penetrated through the other arm portion in a direction substantially perpendicular to the forward / rearward movement direction. A resin screw member is screwed into the screw member, and a tapered groove extending outward is formed in an annular shape on an outer peripheral surface of a cylindrical portion integrally formed concentrically with the screw member. Disc player, wherein a over path shaped grooves are fitted movably to the side edges of the guide plates. 3. A turntable rotating spindle motor is disposed at an end of the chassis, and a pair of left and right guide members are juxtaposed along a radial direction of the turntable on both side edges of a central through hole penetrating through the chassis. An optical pickup is mounted on the guide members so as to be able to move forward and backward. A disc is set on the turntable, and the spindle motor is driven to rotate the disc via the turntable. In a disc player configured to read information recorded on a disc by projecting a laser beam from the optical pickup to the disc while moving the optical pickup back and forth, one of the two guide members has a guide shaft. And the other side is along the longitudinal direction formed integrally with the chassis. A pair of left and right arms are integrally protruded from the housing of the optical pickup, and a guide hole penetrating through one of the arms is movably fitted to the guide shaft. A disk player, wherein an outwardly expanding tapered concave groove formed in a lateral arm portion is movably fitted to a side edge of the guide plate. 4. A screw hole is provided in the other arm portion in a direction substantially orthogonal to the forward / rearward movement direction, a screw member is screwed into the screw hole, and is integrally formed concentrically with the screw member. 4. The disk player according to claim 3, wherein the outwardly expanding tapered groove is formed in an annular shape on the outer peripheral surface of the cylindrical portion. 5. The disk player according to claim 3, wherein the chassis and the motor support of the spindle motor are integrally formed of a synthetic resin made of polyphenylene ether. 6. The disk player according to claim 4, wherein the screw member is formed of a synthetic resin made of polyacetal.