JPH02297751A - Disk elevator - Google Patents

Abstract

PURPOSE:To suppress the height of a guide part to a required minimum by forming the terminal part of the guide part whose distance from the center of a pair of disk holders can be formed larger a little or more than the radius of a disk among the guide parts at which the disk is slid in a horizontal direction. CONSTITUTION:Among the guide parts 3b is which the disk 1 placed on a pair of disk holders 3 is slided in the horizontal direction, the terminal part 3b-1 separated from a rotary shaft 4 on which the pair of disk holders 3 are turned is formed in such a way that its distance R1 from the center is set larger a little than the radius R of the disk 1. The terminal part 3b-2 near to the rotary shaft 4 is formed in such a way that its distance R2 from the center of the pair of disk holders 3 is set larger than the distance R1. Therefore, when the disk 1 is deviated, the guide part 3b coming in contact with the outer peripheral plane of the disk 1 according to the rotation of the disk holders 3 is changed from the terminal part 3b-1 side to the terminal 3b-2 side or vice versa, and the disk 1 is slid in the horizontal direction. Thereby, the height of the guide part 3b can be set equally to the thickness of the disk 1.

Description

Detailed Description of the Invention [Industrial Application Field] This invention slides the disk horizontally by changing the radial direction of the guide portion that contacts the outer peripheral surface of the disk, and adjusts the height of the guide portion and the disk holder. This invention relates to a disk elevating device with a reduced rotation angle.

[Prior Art] Conventionally, there is a disk lifting device for a disk playback device, etc. as shown in FIG. 2.

That is, the disk 1 is lowered or raised by rotation to take a first position where the disk 1 is placed on the turntable 2, and a second position above which the disk 1 can be carried out to the outside of the device. In addition, it is a disk elevating device that slides the disk 1 in the horizontal direction. and,
A pair of disc holders 3 are pivotally connected to a rotation shaft 4 attached to a tray (not shown) that slides in the Y-axis direction, and are maintained in an upper second position by a spring (not shown), and the disc holders 3 are When fixing 1 on turntable 2,
The protrusion 5 is pushed and rotated downward by a clamper holder (not shown), placing the disc 1 on the turntable 2 and maintaining it in the first position below. Further, the guide portion 3a formed on the pair of disc holders 3 and having a tapered angle α is fixed to the pair of disc holders 3 when the disc holder 3 rotates downward or upward. If the center of the turntable 2 attached to the chassis (not shown) is shifted, the disk 1 is slid horizontally. When the disk l is lowered, it is positioned at the center of the turntable 2 via the guide portion 2a of the turntable 2,
When it is raised, it is positioned at the center of the disc holder 3.

[Problem to be solved by the invention]

In this prior art, the positioning of the disc 1 to the center of the turntable 2 or the disc holder 3 is carried out using a guide portion having an inclined surface formed in the same direction as the disc 1 is raised and lowered.
Since this was done using a slanted surface, it was necessary to increase the height of the slope to some extent. Also, this allows the disk holder 3
The rotation angle of the disc holder 3 also became large, and it was necessary to provide a large space for the rotation of the disc holder 3 below the turntable 2. Furthermore, if the center misalignment between the turntable 2 and the disc holder 3 is large, it is necessary to increase the height of the inclined surface or to increase the Taber angle α, but if the Taber angle α is too large, the disc 1 may not move to the center and positioning may not be possible.

This invention was made with the aim of solving the problems of the prior art.

[Means to solve the problem]

Means for solving the above problems will be explained below using FIG. 1 corresponding to the embodiment. This invention has two positions: a first position where the disc 1 is lowered or raised by rotation and placed on the turntable 2, and a second position located above the turntable where the disc 1 can be carried out to the outside of the device. In a disk lifting device that slides the disk 1 in the horizontal direction, a guide portion 3b is formed in the pair of disk holders 3 and allows the disk 1 placed on the pair of disk holders 3 to slide in the horizontal direction. Among these, the end portion 3b-1 farther from the rotation shaft 4 on which the pair of disk holders 3 rotate is formed so that the distance MHI from the center of the pair of disk holders 3 is slightly larger than the radius R of the disk 1, and the rotation The end portion 3b-2 closer to the shaft 4 is characterized in that a distance R2 from the center of the pair of disk holders 3 is larger than the distance R1.

[For production]

With this configuration, if the centers of the disc 1 and turntable 2 or disc holder 3 are misaligned, the disc 1 will shift as the disc holder 3 rotates.
The guide portion 3b in contact with the outer circumferential surface of the disc changes from the end 3b-1 side to the end 3b-2 side or vice versa to slide the disk 1 in the horizontal direction, and corresponds to a conventional inclined surface. do the work.

〔Example〕

FIG. 1 is a diagram showing an embodiment of the present invention.

In Figure 1, ■ is a disk, 2 is a turntable,
3 is a disk holder, and 3b is a guide portion. The guide portion 3b is placed with the disk 1 and guides the disk 1. One end of the guide portion 3b, that is, the end 3b that is farther from the rotation shaft 4 around which the pair of disc holders 3 rotate.
1, the distance R1 from the center C of the pair of disc holders 3 (ideally the center of the turntable 2 and eventually the disc 1) is slightly larger than the radius R of the disc l, for example,
It is formed at R+0.5 to 1.0 am. Further, the other end, that is, the end 3b-2 closer to the rotation axis 4 on which the pair of disc holders 3 rotate, has a distance R2 from the center C of the pair of disc holders 3 that is larger than the path MHI, For example, it is formed at Rl +1.0 to 2.0. The height of the guide portion 3b is formed to be approximately equal to the thickness of the disk l.

When the pair of disc holders 3 are maintained at the second upper position, that is, when the guide portion 3b is located above the turntable 2 (as shown by the solid line), the disc 1
The outer periphery of the disc holder 3 is positioned at the distance R1 of the guide portion 3b of the disc holder 3, that is, at the end 3b-1 side where the distance is smaller. When the projection 5 is pushed by a clamper holder (not shown), the disc holder 3 rotates downward, and the disc 1 is lowered and placed on the turntable 2. At this time, if the centers of the disc 1 and the turntable 2 are misaligned, the guide portion 3b that contacts the outer peripheral surface of the disc 1 will move from the end 3b-1 side to the end 3b-2 side as the disc 1 rotates.
By changing to the side and sliding the disc l by the guidance of the tapered surface 2a of the turntable 2, the displacement is corrected and the disc l is centered on the turntable 2.

On the other hand, the disk holder 3 further rotates downward and stops (as shown by the two-dot chain line). This state, that is, the first downward position, is maintained by pressing the projection 5 by the clamper holder.

Conversely, when rising, the disc holder 3 contacts the disc 1 from the end 3b-2 side closer to the rotating shaft 4, and as it rotates, the contact position moves toward the lower end 3b-2 farther from the rotating shaft 4. gradually changes. Therefore, at the beginning of contact, the guide portion 3
The distance b has apparently increased by R2. Therefore, if the deviation between the centers of the disc holder 3 and the turntable 2 is within R2-R1, the outer circumferential surface of the disc 1 will be aligned with any vertical surface 3b-1 to 3b-2 of the guide portion 3b.
The disc 1 slides upward and is centered in the disc holder 3.

In this way, the distances R1 and R2 from the center C of the pair of disc holders 3 of the ends 3b-1 and 3b-2 of the guide part 3b are
is different. Therefore, when the centers of the turntable 2 and the disc holder 3 are misaligned, the guide portion 3b that contacts the outer peripheral surface of the disc 1 changes as the disc holder 3 rotates. This causes the disk 1 to slide in the horizontal direction and functions as a conventional inclined surface. In this way, the positioning of the disc 1 to the center of the turntable 2 or the disc holder 3 is performed not by a change in the vertical direction of the disc 1, but by a change in the radial direction of the disc 1. Therefore, the height of the guide portion 3b may be approximately equal to the thickness of the disk 1. Therefore, as a result, the rotation angle of the disc holder 3 is also small, and the space in which the disc holder 3 rotates below the turntable 2 can be made small. Note that if the center deviation between the turntable 2 and the disc holder 3 is large, this can be dealt with by increasing R2-R1, and there is no need to make the guide portion 3b higher.

〔Effect of the invention〕

As explained above, the present invention lowers or raises the disk by rotation, and places the disk at a first position on a turntable and a position above the turntable at which the disk can be carried out to the outside of the device. In a disk lifting device that takes a second position and slides the disk in the horizontal direction, the disk is formed in a pair of disk holders, and the disk placed in the pair of disk holders slides in the horizontal direction. The end portion of the guide portion that is farther from the rotation axis around which the pair of disk holders rotate is formed so that the distance from the center of the pair of disk holders is slightly larger than the radius of the disk, and The near end is
The disc holder is characterized in that the distance from the center of the pair of disc holders is larger than the distance.

Therefore, the guide portion in contact with the outer peripheral surface of the disk changes in the radial direction, causing the disk to slide horizontally. Therefore, according to the present invention, the height of the guide portion can be set to the minimum required height, and the rotation angle of the disc holder can also be reduced.

[Brief explanation of the drawing]

FIG. 1 is a diagram showing an embodiment of the present invention, (a) is a schematic plan view, FIG. 2 is a diagram showing rotation of a disk holder, and FIG. 2) is a schematic plan view, and 2) is a sectional view taken along line A-A in (a). l...disc, 2...turntable, 3...
Disc holder, 3b...Guide part Fig. 1 (a) First cause (b) Fig. 2 (a)

Claims (1)

[Claims] 1. A first position where the disc is lowered or raised by rotation and placed on the turntable, and a second position located above the turntable where the disc can be carried out to the outside of the device.
In a disk lifting and lowering device that takes a position and slides the disk horizontally, a guide portion is formed on a pair of disk holders and allows the disk placed on the pair of disk holders to slide horizontally. Among these, the end part farther from the rotation axis around which the pair of disc holders rotates is formed so that the distance from the center of the pair of disc holders is slightly larger than the radius of the disc, and the end part closer to the rotation axis is a disk lifting device characterized in that the distance from the center of the pair of disk holders is larger than the distance.