JP3091591B2 - 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 feeding device for reading a signal recorded on a disk.

[0002]

2. Description of the Related Art An optical disk player for reading a signal recorded on a disk using an optical pickup has become widespread, and such a pickup is moved in a radial direction of the disk by a driving force of an electric motor. Is configured. As a device for moving such a pickup, there is disclosed in Japanese Utility Model Laid-Open Publication No. 2-72470 a technique for moving the pickup by rotating a shaft provided with a thread groove on the outer periphery.

[0003]

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, it is required to reduce the size, especially the thickness, and to consider the influence of vibration.

The above-mentioned publication discloses a torsion coil as a means for holding an engaging member which engages with a thread groove provided on the outer periphery of a shaft driven by an electric motor and which engages with the thread groove. Although technology using a spring is described,
In such a configuration, since the number of parts is large, there is a problem that the configuration becomes complicated and assembly cannot be easily performed.

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

[0006]

The feeder according to the present invention has a pickup support member on which a disk is guided in a radial direction by a cylindrical guide shaft and a pickup is fixed, and a thread groove on the outer periphery. A pickup feed shaft that is provided, is driven to rotate by an electric motor, and is inserted into a shaft hole formed in the pickup support member; and is formed in the pickup support member and communicates with the shaft hole. Mounting holes,
A linear elastic member is inserted into the mounting hole and engages with a screw groove provided on the pickup feed shaft.

[0007]

According to the present invention, the rotation of the pickup feed shaft is achieved by engaging a linear elastic member inserted into a mounting hole formed in the pickup support member with a screw groove provided on the pickup feed shaft. The force is transmitted to the pickup supporting member.

[0008]

FIG. 1 is a cross-sectional view of a main part showing an embodiment of a feeder according to the present invention, FIG. 2 is a cross-sectional view of a main part showing a relationship between a pickup feed shaft and a linear elastic member, and FIG. It is a top view of the important section showing the feeder concerning the present invention.

In FIG. 1, reference numeral 1 denotes a cylindrical guide shaft fixed to a fixed substrate (not shown), 2 denotes a pickup support member to which a pickup 3 is fixed, and one end is supported by the guide shaft 1. The disk (not shown) is provided so as to be able to move in the radial direction.

The pickup support member 2 is provided in parallel with the guide shaft 1 and is inserted through a shaft hole 5 formed in the pickup support member 2.
Is a pickup feed shaft that supports the other end of the pickup 3. The pickup feed shaft is provided with a thread groove 6 on its outer periphery, and is configured to be rotationally driven in the forward and reverse directions by an electric motor (not shown) during the feed operation of the pickup 3. I have.

Reference numeral 7 denotes a mounting hole formed to penetrate the lower surface and the upper surface of the pickup supporting member 2 and communicates with the shaft hole 5, and 8 is inserted into the mounting hole 7 and A linear elastic member having elasticity, and when the screw is inserted into the mounting hole 7, the screw is bent by a pressing force received from a screw groove 6 provided in the pickup feed shaft 4. It is configured to elastically engage with the groove.

The feeder of the present invention is constructed as described above. In such a structure, after the linear elastic member 8 is inserted into and fixed to the mounting hole 7 formed in the pickup support member 2, the pickup is fed. The use shaft 4 is inserted through a shaft hole 5 formed in the pickup support member 2. The operation of inserting the pickup feed shaft 4 into the shaft hole 5 is performed by rotating the pickup feed shaft 4. When such an operation is performed, the linear elastic member 8 is engaged with the screw groove 6 formed on the pickup feed shaft 4 and is pressed and curved as shown in FIG. Further, if the guide shaft 1 is inserted into the other end of the pickup supporting member 2 and fixed to the fixed substrate, the pickup feeding device can be assembled.

The feeder of the present invention is assembled as described above. In such a state, the linear elastic member 8 is elastically inserted into the screw groove 6 provided on the pickup feed shaft 4 as shown in FIG. Is engaged. In this state, when the electric motor for pick-up feed rotates, the pick-up feed shaft 4 is rotated clockwise or counterclockwise in FIG. When the pickup feed shaft 4 rotates, an axial driving force acts on the pickup support member 2 via the linear elastic member 8 engaged with the thread groove 6, so that the pickup support member 2 The guide shaft 1 is displaced in the axial direction, that is, in the radial direction of the disk. In this manner, the pickup supporting member 2 is displaced, but is driven in a state where the linear elastic member 8 is elastically engaged with the screw groove 6 provided on the pickup feeding shaft 4. No rattling occurs, and the driving force transmission operation can be performed accurately.

Since the pickup supporting member 2 moves while being guided by the guide shaft 1 and the pickup feed shaft 4 by the above-described operation, the pickup 3 fixed to the pickup supporting member 2 is moved in the radial direction of the disk. . Therefore, a signal recorded on a disk driven to rotate by a turntable (not shown) is read by the pickup 3.

[0015]

According to the present invention, a linear elastic guide inserted in a mounting hole formed in a pickup support member to which a pickup is fixed while being guided in a radial direction by a cylindrical guide shaft. The rotational force of the pickup feed shaft is transmitted to the pickup support member by elastically engaging the member with a screw groove provided on the pickup feed shaft. The driving force is transmitted while being elastically engaged with the screw groove provided on the shaft, so that rattling does not occur and the driving force transmission operation can be performed accurately. It has the effect of being able to do it. Since the drive mechanism is configured by a simple structure in which the linear elastic member is inserted into the mounting hole formed in the pickup support member, the configuration is simplified, and the present invention reduces the size of the disc player. Has a very great effect on

[Brief description of the drawings]

FIG. 1 is a sectional view of a main part showing an embodiment of the present invention.

FIG. 2 is a sectional view of a main part showing a relationship between a pickup feed shaft and a linear elastic member.

FIG. 3 is a plan view of a main part showing a feeding device according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Guide shaft 2 Pickup support member 3 Pickup 4 Pickup feed shaft 5 Shaft hole 6 Screw groove 7 Mounting hole 8 Linear elastic member

Claims (1)

(57) [Claims] 1. A pickup support member to which a disk is guided in a radial direction by a cylindrical guide shaft and to which a pickup is fixed, a thread groove is provided on an outer periphery, and the disk is rotationally driven by an electric motor. A pickup feed shaft inserted into a shaft hole formed in the pickup support member, a mounting hole formed in the pickup support member and communicating with the shaft hole, and inserted into the mounting hole. And a screw groove provided on the pickup feed shaft and elastically.
And a linear elastic member engaged with the pickup.