JPH11176054A - Turntable device of disk player - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a turntable device capable of easily attaching a magnetic material to a turntable whereon disks are placed. SOLUTION: The device is constituted of the turntable 2 whose center part 3 is inserted into the center hole of a disk 1 and whose placing part 4 for placing the disk 1 thereon are integrally molded with a synthetic resin, a ring-shaped magnetic material 13 in which an engaging part 14 for fixing is firmed while being attached to the placing part 4 of the turntable 2, and an elastic engaging piece 11 integrally molded with the turntable 2 while engaging with the engaging part 14 of the magnetic material 13.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disk player, and more particularly to a turntable device for rotating a disk.

[0002]

2. Description of the Related Art Optical disk players configured to read signals recorded on a disk using an optical pickup have become widespread. Such a disk player has a disk mounted thereon. And a turntable for rotating the disk.

[0003] As a typical optical disc player, a CD player is generally well known. Some of such CD players include a headphone stereo type which is configured to listen to reproduced sound through headphones. There is a portable CD player. Recently, a CD-R used in combination with a computer
OM players are widespread.

[0004] There are various types of disk holding devices used in such disk players, but many of them utilize a magnet's attractive force.

[0005]

An apparatus for holding a disk by utilizing the attraction of a magnet is provided with a magnet on a member for clamping the disk from above and a magnetic material on a turntable side on which the disk is mounted. The disk is configured to be pressed and held on the turntable by the attractive force of the magnet against the magnetic material. The turntable on which the disk is placed has a center portion that fits into the center hole of the disk, and the above-described magnetic material is incorporated in the center portion.

In a device in which a magnetic material is incorporated in the center portion, the holding force of the clamp member acting on the disk acts on the center portion of the disk. Therefore, there is a problem that the holding force of the disk is insufficient and an unnecessary vibration phenomenon occurs in the disk. is there. In order to solve such a problem, a method of arranging a magnetic body on a mounting portion of a turntable has been performed. However, there is a problem that the magnetic body cannot be easily attached.

An object of the present invention is to provide a turntable device for a disk player which solves such a problem.

[0008]

According to the turntable device of the present invention, a center portion fitted into a center hole provided in a disk and a mounting portion on which the disk is mounted are integrally formed of synthetic resin. A turntable having a hole into which the rotating shaft of the electric motor is press-fitted, and a ring-shaped magnetic body attached to a mounting portion of the turntable and having a fixing engagement portion, An elastic engaging piece is formed integrally with the turntable while being engaged with the engaging portion formed on the magnetic body.

[0009]

FIG. 1 is a front sectional view of a main part showing a turntable device of the present invention, FIG. 2 is a plan view of a magnetic material constituting the present invention, FIG. 3 is a sectional view taken along a line AB in FIG. 1 is a plan view of a turntable constituting the present invention.

In FIG. 1, reference numeral 1 denotes a disk, and 2 denotes a center portion which is fitted into a center hole 1A provided in the disk 1 and a mounting portion 4 on which the disk 1 is mounted. And a hole 7 into which the rotating shaft 6 of the electric motor 5 is press-fitted. 8
Is a fixed substrate to which the electric motor 5 is fixed by screws 9 and 10, and incorporates a drive mechanism of an optical pickup (not shown) and the like.

Reference numeral 11 denotes an elastic engagement piece integrally formed with the turntable 2 and has an inclined portion 11A and a lock portion 11B. Such elastic engaging pieces 11 are formed concentrically at 120 degree intervals as shown in FIG. Reference numeral 12 denotes a circular hole formed in the turntable 2 and is provided for inserting a tip of a screwdriver for tightening screws 9 and 10 for fixing the electric motor 5 to the fixed substrate 8.

Numeral 13 denotes a ring-shaped magnetic body attached to the mounting portion 4 of the turntable 2, which engages with an elastic engaging piece 11 formed on the turntable 2 as shown in FIG. An engagement portion 14 is formed, and a semicircular cutout portion 15 is formed at a position corresponding to the hole 12. The engagement portion 14 is formed by being pressed and deformed from the upper surface side to the lower surface side by press working as shown in FIG.

In such a configuration, the work of attaching and fixing the magnetic body 13 to the turntable 2 is performed by forming the engaging portion 14 and the notch 15 formed on the magnetic body 13 on the turntable 2. It can be performed by pressing against the surface of the mounting portion 4 of the turntable 2 while corresponding to the elastic engagement pieces 11 and the holes 12. When such an operation is performed, the corner of the lower surface of the engaging portion 14 is
The elastic engagement piece 11 is pressed and displaced inwardly. When the magnetic body 13 is further pressed and displaced while performing such a displacement operation, the lock portion 11B provided subsequent to the inclined portion 11A and the engagement portion 14 are brought into a state of engagement.

FIG. 1 shows a turntable device assembled in this manner. A magnetic body 13 is mounted on a mounting portion 4 of a turntable 2 with the elastic engaging piece 11 and the engaging portion 1.
4, the magnetic member 1 is fixed.
The height of the mounting portion 4 of the turntable 2 is higher than that of the turntable 3. That is, the disk 1 is supported by the mounting portion 4 of the turntable 2 and the magnetic material 1
3 is configured not to contact.

[0015]

According to the turntable device of the present invention, an elastic engagement is formed integrally with a turntable which is integrally formed of synthetic resin and has a hole into which a rotary shaft of an electric motor is press-fitted. Since the magnetic body is attached and fixed to the turntable by engaging the engaging portion formed on the ring-shaped magnetic body with the piece, the assembling work is greatly simplified.

Further, according to the present invention, the inclined portion for guiding the engaging portion during the engaging operation with the engaging portion is formed on the elastic engaging piece.
Assembly work can be performed smoothly. The present invention has an advantage that the magnetic body can be firmly fixed to the turntable because the plurality of elastic engaging pieces and the engaging portions are provided.

[Brief description of the drawings]

FIG. 1 is a front sectional view of a main part showing a turntable device of the present invention.

FIG. 2 is a plan view of a magnetic body constituting the present invention.

FIG. 3 is a sectional view taken along a line AB in FIG. 2;

FIG. 4 is a plan view of a turntable constituting the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Disc 2 Turntable 3 Center part 4 Placement part 5 Electric motor 6 Rotating shaft 8 Fixed substrate 11 Elastic engagement piece 11A Inclined part 11B Lock part 13 Magnetic body 14 Engagement part

Claims (3)

[Claims] 1. A hole in which a center portion fitted into a center hole provided in a disk and a mounting portion on which the disk is mounted are integrally formed of synthetic resin, and a rotary shaft of an electric motor is press-fitted. And a ring-shaped magnetic body attached to the mounting portion of the turntable and having an engaging portion for fixing, the engagement being formed on the magnetic body. A turntable device for a disc player, wherein an elastic engagement piece for engaging with a portion is integrally formed with the turntable. 2. The turntable device according to claim 1, wherein a plurality of engaging portions and elastic engaging pieces are provided. 3. The turntable device according to claim 1, wherein an inclined portion is formed on the elastic engaging piece to guide the engaging portion during the engaging operation with the engaging portion.