JPH1047401A - Vibration control device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily and reliably attach a damper to the support shaft of a vibration control device and establish its effective vibration-control function. SOLUTION: A vibration control device comprises a substantially gourd- sectioned hollow damper rubber 1 having an upper expansion part, a lower expansion part and a fitting part therebetween, and a support shaft 8 erected on an optical-disk drive body for supporting the upper and the lower expansion parts of the damper rubber through engagement therewith. The diameter of the opening of the lower expansion part is made larger than that of the upper expansion part. The support shaft 8 has the first engaging part to engage with the upper expansion part, the second engaging part to engage with the fitting part and the third engaging part to engage with the lower expansion part, and are tapered at its contiguous portions between the first and the second engaging parts and between the second and the third engaging parts.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] 1. Field of the Invention [0002] The present invention relates to an anti-vibration device used for an optical disk drive device that is widely used as an external memory of a computer.

[0002]

2. Description of the Related Art A conventional anti-vibration device will be described below using a CD-ROM drive as an example. FIG. 6 is a sectional view of a mounted state of the conventional vibration isolator, and FIG. 7 is a sectional view of the damper rubber of FIG. In the figure, the center of the damper rubber 16 is engaged with the support 17 of the optical pickup, and the opening hole diameter 23 provided in the upper elastic part 20 of the damper rubber 16 and the opening hole diameter 25 provided in the lower elastic part 22 of the damper rubber 16.
The damper rubber 16 is inserted into a support shaft 18 provided in the optical disk device to position the damper rubber 16 with respect to the optical pickup. Further, by arranging the pressing member 19 from above the damper rubber 16, it is possible to obtain an anti-vibration function for the optical pickup.

The section of the damper rubber 16 in the focus direction perpendicular to the optical disk surface is composed of an upper telescopic portion 20, a lower telescopic portion 22, and a fixed portion 21 which engages with the support portion 17 of the optical pickup. The shape of the upper elastic part 20 and the lower elastic part 22 are the same, and the opening diameter 23 provided in the upper elastic part 20 and the opening diameter 25 provided in the lower elastic part 22
In addition, the hole diameter 24 of the fixed portion 21 which is provided between the upper elastic portion 20 and the lower elastic portion 22 and engages with the support portion 17 of the optical pickup is equal. In addition, the hole diameter (2
3, 24, 25), the diameter of the support shaft 18 provided in the optical disk device to be inserted and supported is the same from the shaft tip to the root.

[0004]

FIG. 8 is a diagram showing a process of mounting a damper rubber on a support shaft. In FIG. 8, the diameter of the opening shaft diameter 23 provided in the upper elastic portion 20 of the damper rubber 16, the diameter of the opening hole 25 provided in the lower elastic portion 22, and the diameter of the support shaft 18 of the optical disk engaged with the opening hole diameters (23, 24) are equal. For this reason, when an inclined mounting method as shown in FIG. 8A is performed, as shown in FIG.
5) The end face may be turned up.

Further, in an optical memory device, an optical pickup has become heavy in order to cope with various optical disks. Therefore, the damper rubber 1 as in the conventional example is used.
The upper elastic part 20 and the lower elastic part 22 of 6 do not have the same shape, and a countermeasure is required to prevent the upper elastic part 20 and the lower elastic part 22 from being mounted upside down.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and it is possible to easily and reliably mount a damper on a support shaft and to achieve an effective anti-vibration function for various optical disks. An object is to provide a vibration isolator.

[0007]

SUMMARY OF THE INVENTION The present invention has been made to achieve the above object, and is an anti-vibration device for attaching an optical pickup to a main body of an optical disk drive. And a supporting shaft which is provided in the main body of the optical disk drive and engages with and supports the vertical expansion and contraction portion of the damper rubber. And the opening diameter of the lower elastic part is formed larger than the opening diameter of the upper elastic part, and the support shaft is engaged with the first engaging part engaging with the upper elastic part and the second engaging part engaging with the mounting part. , And a third engaging portion that engages with the lower telescopic portion. Each connecting portion of the first engaging portion, the second engaging portion, and the third engaging portion It is characterized by being formed in a tapered shape.

As described above, the damper can be easily and reliably attached to the support shaft, and an effective anti-vibration function can be achieved for various optical disks.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The invention according to claim 1 of the present invention is a vibration isolator for attaching an optical pickup for recording and reproducing information to and from an optical disk to a main body of an optical disk drive device, comprising an upper elastic portion and a lower elastic portion. A mounting part is provided between the elastic part and the hollow part of the damper rubber having a roughly gourd-shaped cross section perpendicular to the optical disk, and the vertical part of the damper rubber is engaged with and supported by the vertical elastic part of the damper rubber. A support shaft, wherein the opening diameter of the lower elastic portion is formed larger than the opening hole diameter of the upper elastic portion, and the support shaft engages the first engaging portion engaging with the upper elastic portion and the mounting portion. It has a second engagement portion and a third engagement portion that engages with the lower telescopic portion, and the respective connection of the first engagement portion, the second engagement portion, and the third engagement portion A vibration isolator characterized in that the portion is formed in a tapered shape. . With the above configuration, the damper can be easily and reliably attached to the support shaft, and an effective vibration damping function can be achieved for various optical disks.

An embodiment of the present invention will be described below with reference to FIGS. FIG. 1 is a cross-sectional view of a vibration isolator according to an embodiment of the present invention, FIG. 2 is a cross-sectional view of a damper rubber 1 of FIG. 1, and FIG. 3 shows a state where the damper rubber of FIG. 4 is a view showing a state in which the damper rubber of FIG. 1 is mounted on the support shaft 8 in reverse, and FIG. 5 is a view showing FIG.
FIG. 4 is an enlarged view of a tip portion of the support shaft 8 of FIG.

In the figure, a gourd-shaped damper rubber having a fixed portion 3 whose cross section in a focus direction perpendicular to the optical disk surface is engaged with a support portion 15 of an optical pickup between an upper elastic portion 2 and a lower elastic portion 4. 1 is the upper elastic part 2
Hole diameter 5 provided on the lower and upper and lower elastic portions 4
Are arranged differently. In this embodiment, butyl rubber having a hardness of 40 to 60 is used as a material for the damper rubber.

Further, the diameter of the support shaft required to engage with the upper and lower opening hole diameters (5, 7) is provided on the support shaft 8 of the optical disk device which supports the damper rubber 1, and the upper elastic portion 2 The opening hole diameter 5 has an engagement with the surface 9 of the support shaft 8,
The opening hole diameter 7 of the lower elastic portion 4 is engaged with the surface 11 of the support shaft 8. The hole diameter 6 of the fixing portion 3 which engages with the support portion 15 of the optical pickup engages with the surface 10 of the support shaft 8, and the diameter of each surface (9, 10, 11) which engages with the support shaft 8 is Is different. Further, the surfaces of the damper rubber 1 that are engaged except for the upper telescopic portion 2, the lower telescopic portion 4, and the fixed portion 3 have surfaces inclined such that the shaft diameter increases in the direction in which the damper rubber 1 is attached to the support shaft 8 ( Tapered surface 12a,
12b, 12c).

With the above configuration, as shown in FIG. 3, if the lower extensible portion 4 is inserted into the support shaft 8 first, the lower extensible portion 4
Since the opening hole diameter 7 of the support shaft 8 is larger than the shaft tip diameter 9 of the support shaft 8, it can be inserted without difficulty. In addition, as shown in FIG. 5, it can be mounted in a regular state without being turned by the inclined surfaces (12a, 12c) provided on the support shaft. Further, as shown in FIG. 4, when the upper elastic portion 2 is inserted into the support shaft 8 first, the opening diameter 5 of the upper elastic portion 2 and the shaft tip diameter 9 of the support shaft 8 are substantially equal, so that the opening hole diameter 5 is supported. Axis 8
However, since the diameter 5 of the opening in the upper elastic portion 2 is smaller than the surface 10 of the support shaft 8, the damper rubber 1 cannot be attached to the support shaft 8.

[0014]

As is clear from the above embodiments, according to the present invention, it is possible to easily and surely mount the damper rubber, and it is possible to effectively mount the vibration damping function to various optical disks. Can be achieved.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of a vibration isolator according to an embodiment of the present invention.

FIG. 2 is a sectional view of the damper rubber of FIG. 1;

FIG. 3 is a diagram showing a state where the damper rubber of FIG. 1 is normally mounted on a support shaft.

FIG. 4 is a view showing a state in which the damper rubber of FIG. 1 is mounted on the support shaft in reverse.

FIG. 5 is an enlarged view of a tip portion of the support shaft of FIG. 3;

FIG. 6 is a cross-sectional view of a mounted state of a conventional vibration isolator.

FIG. 7 is a sectional view of the damper rubber of FIG. 6;

FIG. 8 is a diagram showing a process of mounting a damper rubber on a support shaft.

[Explanation of symbols]

 1,16 Damper rubber 2,20 Upper elastic part 3,21 Fixed part 4,22 Lower elastic part 5,23,25 Opening hole diameter 6,24 Hole diameter 8,15,17,18 Support shaft 9,10,11 Shaft diameter 12a , 12b, 12c Inclined surface (tapered surface) 14, 19 Pressing member

Claims (1)

[Claims] An anti-vibration device for mounting an optical pickup for recording and reproducing information on an optical disk to a main body of an optical disk drive device, wherein a mounting portion is provided between an upper telescopic portion and a lower telescopic portion. A vertical gourd-shaped hollow damper rubber having a substantially gourd-shaped cross section, and a support shaft erected on the optical disk drive main body and engaged with and supported by upper and lower telescopic portions of the damper rubber. The opening hole diameter is formed to be larger than the opening hole diameter of the upper telescopic part, and the support shaft has a first engaging part engaging with the upper telescopic part, a second engaging part engaging with the mounting part, and A third engaging portion that engages with the lower elastic portion,
An anti-vibration device, wherein a connecting portion of each of the first engaging portion, the second engaging portion, and the third engaging portion is formed in a tapered shape.