JP3037117B2 - Pickup feeder - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pickup feeder for reading a signal recorded on a disk.

[0002]

2. Description of the Related Art Disk players which read signals recorded on a disk using an optical pickup have become widespread, and such a pickup is moved in the radial direction of the disk by the driving force of an electric motor. Is configured. Japanese Patent Application Laid-Open No. 2-72470 discloses a technique for moving such a pickup by rotating a shaft provided with a feed groove provided on the outer periphery, which is various.

A device for performing a feed operation of a pickup by rotating a shaft provided with a feed groove on the outer periphery can perform the feed operation of the pickup accurately, but cannot feed at a high speed. is there. There is an apparatus using a rack gear as a pickup feeder which has improved such a point, and an example of such a technique is disclosed in Japanese Patent Application Laid-Open No. 6-251510.

[0004]

As a typical optical disc player, a CD player is well known. Some of such CD players are configured to listen to reproduced sound by headphones. There is a portable CD player of the headphone stereo type.
Since such a portable CD player is used while being carried, and a CD-ROM player used by being incorporated in a personal computer is required to be light and small, particularly thin.

In the conventional pickup feeder using a rack gear, a spur gear is used as a gear for transmitting the torque of the motor to the rack gear. Therefore, the direction of the rotation axis of the motor and the direction of the rotation axis of the gear are used. Were the same, and were not suitable for thinning. By making the direction of the rotating shaft of the electric motor perpendicular to the direction of the rotating shaft, the device can be made thinner.However, since the worm gear was used in the past, the pickup can be moved at high speed. There is a problem that can not be done.

An object of the present invention is to provide a pickup feeding device which solves such a problem.

[0007]

According to the present invention, there is provided a feeder, in which a guide shaft guides a radial movement of a disk and a pickup is fixed, and a pickup support member integrally formed with the pickup support member. A rack gear provided to be displaced, a drive gear rotatably mounted on the substrate and meshing with the rack gear, and a drive gear rotatably mounted on the substrate and below. A transmission gear in which a spur gear meshing with the transmission gear is formed and a bevel gear is formed on the upper side; and a rotation shaft is provided to be orthogonal to the rotation axis of the transmission gear, and the transmission gear is The driving bevel gear in mesh with the tooth gear is constituted by an electric motor fixed to the rotating shaft.

[0008]

The present invention utilizes a bevel gear as a gear for transmitting the rotational force of an electric motor to a rack gear provided on a pickup support member, thereby performing a moving operation of a pickup at a high speed and a disk player. It is intended to reduce the thickness and weight of the device.

[0009]

FIG. 1 is a plan view of a main part showing a feeder of the present invention, and FIG. 2 is a front view of a main part showing a feeder of the present invention.

In FIG. 1, reference numeral 1 denotes a guide shaft which is fixedly mounted on a fixed substrate 2; The rack gear 4 is a pickup supporting member that is supported so as to be capable of being displaced, and a rack gear 4 that extends in the displacement direction is provided so as to be integrally displaced. Reference numeral 5 denotes a drive gear rotatably attached to a rotation support shaft 6 provided on the fixed substrate 2, and a small-diameter gear 7 and a large-diameter gear 8 meshed with the rack gear 4 are integrally formed. ing.

Reference numeral 9 denotes a transmission gear rotatably mounted on a rotation support shaft 10 provided on the fixed substrate 2, and a transmission gear 9 on a lower side in a state meshed with the large-diameter gear 8 of the drive gear 5. A gear 11 is formed, and a bevel gear 12 having a diameter larger than the diameter of the spur gear 11 is formed on the upper side. Reference numeral 13 denotes an electric motor that is driven to rotate when the pickup is moved.
Is attached to and fixed to the fixed substrate 2 so as to be orthogonal to the rotation support shaft 10 which is the rotation axis of the above. 15 is the motor 1
3 is a drive bevel gear fixed to the end of the rotating shaft 14, which meshes with the bevel gear 12 and has a function of transmitting rotation to the bevel gear 12.

As described above, the pickup feeder of the present invention is configured. In this configuration, when the electric motor 13 rotates, the driving bevel gear 15 fixed to the rotating shaft 14 is driven to rotate. You. When the drive bevel gear 15 rotates, the rotation is transmitted to the bevel gear 12 meshing with the drive bevel gear 15, and the bevel gear 12 is driven to rotate. When the bevel gear 12 rotates, the spur gear 11 integrally formed with the bevel gear 12 is driven to rotate.

When the spur gear 11 rotates, the spur gear 11
The large-diameter gear 8 meshed with the large-diameter gear 8 is rotationally driven, and the small-diameter gear 7 integrally formed with the large-diameter gear 8 is rotationally driven. As a result, a displacement force in the directions of arrows A and B acts on the rack gear 4 meshed with the small-diameter gear 7, and the pickup support member 3 provided with the rack gear 4 is moved by the guide shaft 1. It is displaced while being guided. Accordingly, the optical pickup can be moved and displaced to a desired position by the displacement operation of the pickup support member 3.

As described above, the moving operation of the optical pickup by the electric motor 13 is performed. Next, the assembling operation will be described. The rotation support shaft 6 and the rotation support shaft 10 are fixedly mounted on the fixed substrate 2, and the drive gear 5 is inserted into the rotation support shaft 6 from above, and then the transmission gear 9 is inserted into the rotation support shaft 10 from above. After performing such an assembling operation, the driving bevel gear 15 fixed to the rotating shaft 14 of the electric motor 13
The motor 13 is fixed to the fixed substrate 2 with screws or the like while meshing with the bevel gear 12. Then, the guide shaft 1 and the like are fixed to the fixed substrate 2 while meshing the rack gear 4 provided on the pickup support member 3 displaceably supported by the guide shaft 1 with the small-diameter gear 7 formed on the drive gear 5. Fix it.

As described above, the pickup feeder of the present invention is assembled. As shown in FIG.
The upward displacement of the transmission gear 9 on which the bevel gear 12 is formed is restricted by the meshing operation of the driving bevel gear 15 with the bevel gear 12. Therefore, the transmission gear 9 is in a state of being inserted into the rotation support shaft 10,
It is not necessary to provide a retaining member such as a washer. Further, since the bevel gear 12 is disposed above the large-diameter gear 8 formed on the driving gear 5, the upward displacement of the driving gear 5 is in a state of being restricted. Therefore, the drive gear 5 is in a state of being inserted into the rotary support shaft 6, and there is no need to provide a retaining member such as a washer.

[0016]

According to the present invention, the bevel gear is used as the gear for transmitting the rotational force of the electric motor to the rack gear provided on the pickup supporting member, so that the pickup can be moved at a high speed. Since the drive mechanism of the pickup can be incorporated in the thickness of the electric motor, it has a great effect on reducing the thickness of the disc player.

Further, the present invention provides a bevel gear above a drive gear meshed with the spur gear by making the diameter of the bevel gear formed on the transmission gear larger than the diameter of the spur gear. Since the gear is located, the upward displacement of the drive gear can be restricted, and as a result, there is no need to provide a special member for preventing the drive gear from coming off. And the advantage that the assembling work can be easily performed.

Further, in the present invention, the upward displacement of the transmission gear is regulated by the driving bevel gear fixed to the rotating shaft of the electric motor. Therefore, there is an advantage that there is no need to provide a simple member, so that the configuration is simplified and the assembling operation can be easily performed.

[Brief description of the drawings]

FIG. 1 is a plan view of a main part showing a feeding device of the present invention.

FIG. 2 is a front view of a main part showing a feeder of the present invention.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 guide shaft 2 fixed substrate 3 pickup support member 4 rack gear 5 drive gear 9 transmission gear 11 spur gear 12 bevel gear 13 motor 15 drive bevel gear

Claims (3)

(57) [Claims] 1. A pickup support member to which a guide shaft guides the movement of a disk in a radial direction and to which a pickup is fixed, a rack gear provided to be displaced integrally with the pickup support member, A drive gear rotatably attached to the board and meshing with the rack gear, and a spur gear rotatably mounted on the board and meshed with the drive gear below are formed. A transmission gear having a bevel gear formed on the upper side, and a drive umbrella provided with a rotation axis orthogonal to the rotation axis of the transmission gear and in mesh with the bevel gear of the transmission gear. A pickup feeder comprising an electric motor having a tooth gear fixed to a rotating shaft. 2. The method according to claim 1, wherein the diameter of the bevel gear formed on the transmission gear is larger than the diameter of the spur gear, and the upward displacement of the drive gear is regulated by the bevel gear. The pickup feed device according to claim 1, wherein: 3. The pickup feed device according to claim 2, wherein an upward displacement of the transmission gear is regulated by the drive bevel gear.