CN100561586C - Vibration absorbing device - Google Patents

Abstract

The invention is a vibration absorbing device, the vibration absorbing device is arranged on the optical machine module of the optical disk machine, and restrains the vibration generated by the optical machine module in each rotating speed operation, the vibration absorbing device includes: the body is fixedly arranged on the optical-mechanical module; a vibration damper disposed on the body in an elastically liftable manner; the actuating element is arranged on the body, is connected to the vibration damper and provides thrust for pushing the vibration damper to lift; the controller controls the thrust output by the actuating element according to the change of the rotating speed of the optical-mechanical module, so that the lifting elastic absorption of the vibration damper is changed, and the displacement and the relative vibration of the optical-mechanical module are reduced; the vibration absorption device can inhibit the vibration of the optical-mechanical module of the optical disk machine in various rotating speeds.

Description

Vibration absorbing device

technical field

The present invention relates to a vibration absorbing device, in particular to a vibration absorbing device applied to a CD player.

Background technique

After Blu-ray HD-DVD (High Density Versatile Digital Laser Disc), it is estimated that optical disc storage technology will develop towards higher density storage media, such as near-field storage, 3D storage technology, etc. Under this development trend, the The distance between the read-write head and the disc is smaller accordingly, so the read-write head of the optical disc drive is more sensitive to the interference caused by the vibration of the disc due to the rotation. Due to the great vibration of the disc when it rotates, the optical engine module in the optical drive will adjust the rotational speed of the disc according to the reading and writing conditions to suit the reading, writing or erasing of the disc data, so the operation of the optical disc drive is not in a fixed state. Under the rotational speed, the frequency of the main vibration is not a certain value.

Currently, the Dynamic Vibration Absorber used in CD-ROMs can only reduce the vibration generated at a specific speed. Manufacturers such as Lite, ASUS, and Pioneer have successfully applied vibration absorbers to on the CD-ROM. As shown in FIG. 1 , it is a schematic plan view of an existing vibration-absorbing device 11 applied to an optical disc drive 1. The vibration-absorbing device 11 is composed of a plurality of second elastic bodies 111 and a vibration-damping body 112 combined with the second elastic bodies 111. , the vibration-absorbing device 11 is combined on the optical-mechanical module 13 of the optical disc player 1, the optical-mechanical module 13 is arranged on a carrier 14 combined with a first elastic body 12, and the first elastic body 12 is connected to the optical disc On the housing 15 of the machine 1, the setting of the first elastic body 12 can reduce the vibration generated during the operation of the optical-mechanical module 13, and the setting of the vibration-absorbing device 11 can absorb the vibration of the optical-mechanical module 13 to achieve vibration reduction Effect.

The theoretical structure of the vibration-absorbing device 11 disposed on the optical-mechanical module 13 of the optical disc player 1 is shown in FIG. 2 , and the equation of motion of the optical-mechanical module 13 is expressed as:

m ₁ x ₁ +c ₁ x ₁ +c ₂ (x ₁ -x ₂ )+k ₁ x ₁ +k ₂ (x ₁ -x ₂ )＝F(t)＝pω ² e ^jωt

m ₂ x ₂ +c ₂ (x ₂ -x ₁ )+k ₂ (x ₂ -x ₁ )＝O _f

Wherein, m ₁ is the mass of the optical-mechanical module 13, m ₂ is the mass of the vibration-damping body 112, x ₁ is the vibration displacement of the optical-mechanical module 13, x ₂ is the vibration displacement of the vibration-damping body 112, and F(t) is Rotational unbalance force as a function of time, p is the amount of rotational unbalance, ω is the rotational speed, _k1 is the elastic coefficient of the first elastic body 12, _k2 is the elastic coefficient of the second elastic body 111, _c1 is the first elastic The damping of the body 12, c ₂ is the damping of the second elastic body 111.

Simplified conversion by the above equation of motion, the vibration displacement x ₁ of the optomechanical module 13 can be written as:

$\left|{\mathrm{<figure-callout\; id="1"\; label="x"\; filenames="C2005101274840009H2.png"\; state="\{\{state\}\}">x</figure-callout>}}_1\right|=\frac{\sqrt{{\left\{\right[k_2-{\mathrm{\&omega;}}^2{m}_2]{\mathrm{\&Delta;}}_R+{\mathrm{<figure-callout\; id="2"\; label="c"\; filenames="C2005101274840010H2.png"\; state="\{\{state\}\}">c</figure-callout>}}_2\mathrm{\&omega;}{\mathrm{\&Delta;}}_I\}}^2+{\{{\mathrm{<figure-callout\; id="2"\; label="c"\; filenames="C2005101274840010H2.png"\; state="\{\{state\}\}">c</figure-callout>}}_2\mathrm{\&omega;}{\mathrm{\&Delta;}}_R-[k_2-{\mathrm{\&omega;}}^2{m}_2\left]{\mathrm{\&Delta;}}_I\right\}}^2}}{{\mathrm{\&Delta;}}_{\mathrm{<figure-callout\; id="2"\; label="R"\; filenames="C2005101274840010H2.png"\; state="\{\{state\}\}">R</figure-callout>}}^2+{\mathrm{\&Delta;}}_I^2}p{\mathrm{\&omega;}}^2$ It can be seen that when the resonance frequency of the vibration absorbing device 11 is equal to the frequency of the external force, that is $\sqrt{{\mathrm{<figure-callout\; id="2"\; label="k"\; filenames="C2005101274840010H2.png"\; state="\{\{state\}\}">k</figure-callout>}}_2/{\mathrm{<figure-callout\; id="2"\; label="m"\; filenames="C2005101274840010H2.png"\; state="\{\{state\}\}">m</figure-callout>}}_2}=\mathrm{\&omega;},$ The vibration displacement of the optomechanical module 13 can be minimized. But the elastic coefficient k ₂ of the second elastic body 111 and the mass m ₂ of the vibration damping body 112 are both fixed values, so they can only absorb the external force of a specific frequency (that is, a specific rotational speed). Therefore, when the optical-mechanical module 13 When the speed changes, there is no vibration absorption function, which sometimes causes greater vibration.

Therefore, how to overcome the shortcomings of the prior art and provide a vibration absorbing device to suppress the vibration of the optical-mechanical module at various speeds is an urgent problem to be solved.

Contents of the invention

In order to overcome the above-mentioned shortcomings of the prior art, the main purpose of the present invention is to provide a vibration absorbing device to suppress the vibration generated by the optical-mechanical module of the optical disc player at various rotational speeds.

In order to achieve the above purpose, the present invention provides a vibration absorbing device, which is arranged on the optical-mechanical module of the optical disc drive, and suppresses the vibration generated by the optical-mechanical module during operation at various speeds. The vibration-absorbing device includes: a body, fixed on the On; the damping body, which can be elastically arranged on the body; the elastic body is arranged on the body to provide the lifting elasticity of the vibration body; the actuating element is arranged on the body and connected to the vibration body to provide The thrust that pushes the vibration damping body up and down; and the controller controls the thrust output by the actuating element according to the change in the rotational speed of the optomechanical module, thereby changing the lifting elasticity of the vibration damper, absorbing and reducing the vibration of the optomechanical module Displacement and relative vibration.

The above-mentioned body can be an I-shaped structure, the body can be an I-shaped structure with two horizontal parts and a vertical part, the actuating element can move up and down relative to the vertical part, and the vibration damping body is located at least on the vertical part One side is attached to one side of the actuator element. The vibration damping body can be an object with mass or moment of inertia, such as a metal plate or a metal block, and the vibration damping body can be in an H-shaped structure. Preferably, two vibration damping bodies can be arranged on the body.

The main body can also be provided with a guide rod for sheathing the elastic body, and the elastic body can be, for example, a spring, a shrapnel, rubber or other equivalent structures with rigidity and damping. The actuating element may eg be a voice coil motor (VCM), a ceramic actuator (PZT), an electromagnetic actuator or a pneumatic actuator.

The controller controls the thrust of the actuating element to be proportional to the operating current of the actuating element, and the rotational unbalanced force is proportional to the square of the rotational speed of the optical-mechanical module. The motion equation of the vibration-absorbing device and the optical-mechanical module can be expressed as:

m ₁ x ₁ +c ₁ x ₁ +c ₂ (x ₁ -x ₂ )+k ₁ x ₁ +k ₂ (x ₁ -x ₂ )+iK _f ＝F(t)＝pω ² e ^jωt

m ₂ x ₂ +c ₂ (x ₂ -x ₁ )+k ₂ (x ₂ -x ₁ )-iK＝O _f

Among them, m ₁ is the mass of the optical-mechanical module, m ₂ is the mass of the vibration control body, x ₁ is the displacement of the optical-mechanical module due to vibration, x ₂ is the vibration displacement of the vibration control body, and F(t) is the rotational unbalance Force as a function of time, p is the amount of rotational unbalance, ω is the rotational speed, k ₁ is the elastic coefficient of the first elastic body, k ₂ is the elastic coefficient of the elastic body, c ₁ is the damping of the first elastic body, c ₂ is The damping of the elastomer, _Kf is the force constant of the actuating element, and i is the operating current of the actuating element.

When i=b(x ₁ -x ₂ ), the displacement x ₁ generated by the vibration of the optical-mechanical module can be expressed as:

$<span\; class="notranslate">\; |</span>{\mathrm{<span\; class="notranslate">\; x</span>}}_{\mathrm{<span\; class="notranslate">\; 1</span>}}<span\; class="notranslate">\; |</span><span\; class="notranslate">\; =</span>\frac{\sqrt{{<span\; class="notranslate">\; \{</span><span\; class="notranslate">\; [</span><span\; class="notranslate">\; (</span>{\mathrm{<span\; class="notranslate">\; <figure-callout\; id="2"\; label="k"\; filenames="C2005101274840010H2.png"\; state="\{\{state\}\}">k</figure-callout></span>}}_{\mathrm{<span\; class="notranslate">\; 2</span>}}<span\; class="notranslate">\; +</span>\mathrm{<span\; class="notranslate">\; b</span>}{\mathrm{<span\; class="notranslate">\; K</span>}}_{\mathrm{<span\; class="notranslate">\; f</span>}}<span\; class="notranslate">\; )</span><span\; class="notranslate">\; -</span>{\mathrm{<span\; class="notranslate">\; \&omega;</span>}}^{\mathrm{<span\; class="notranslate">\; 2</span>}}{\mathrm{<span\; class="notranslate">\; m</span>}}_{\mathrm{<span\; class="notranslate">\; 2</span>}}<span\; class="notranslate">\; ]</span>{\mathrm{<span\; class="notranslate">\; \&Delta;</span>}}_{\mathrm{<span\; class="notranslate">\; R</span>}}<span\; class="notranslate">\; +</span>{\mathrm{<span\; class="notranslate">\; <figure-callout\; id="2"\; label="c"\; filenames="C2005101274840010H2.png"\; state="\{\{state\}\}">c</figure-callout></span>}}_{\mathrm{<span\; class="notranslate">\; 2</span>}}\mathrm{<span\; class="notranslate">\; \&omega;</span>}{\mathrm{<span\; class="notranslate">\; \&Delta;</span>}}_{\mathrm{<span\; class="notranslate">\; I</span>}}<span\; class="notranslate">\; \}</span>}^{\mathrm{<span\; class="notranslate">\; 2</span>}}<span\; class="notranslate">\; +</span>{<span\; class="notranslate">\; \{</span>{\mathrm{<span\; class="notranslate">\; <figure-callout\; id="2"\; label="c"\; filenames="C2005101274840010H2.png"\; state="\{\{state\}\}">c</figure-callout></span>}}_{\mathrm{<span\; class="notranslate">\; 2</span>}}\mathrm{<span\; class="notranslate">\; \&omega;</span>}{\mathrm{<span\; class="notranslate">\; \&Delta;</span>}}_{\mathrm{<span\; class="notranslate">\; R</span>}}<span\; class="notranslate">\; -</span><span\; class="notranslate">\; [</span><span\; class="notranslate">\; (</span>{\mathrm{<span\; class="notranslate">\; <figure-callout\; id="2"\; label="k"\; filenames="C2005101274840010H2.png"\; state="\{\{state\}\}">k</figure-callout></span>}}_{\mathrm{<span\; class="notranslate">\; 2</span>}}<span\; class="notranslate">\; +</span>\mathrm{<span\; class="notranslate">\; b</span>}{\mathrm{<span\; class="notranslate">\; K</span>}}_{\mathrm{<span\; class="notranslate">\; f</span>}}<span\; class="notranslate">\; )</span><span\; class="notranslate">\; -</span>{\mathrm{<span\; class="notranslate">\; \&omega;</span>}}^{\mathrm{<span\; class="notranslate">\; 2</span>}}{\mathrm{<span\; class="notranslate">\; m</span>}}_{\mathrm{<span\; class="notranslate">\; 2</span>}}<span\; class="notranslate">\; ]</span>{\mathrm{<span\; class="notranslate">\; \&Delta;</span>}}_{\mathrm{<span\; class="notranslate">\; I</span>}}<span\; class="notranslate">\; \}</span>}^{\mathrm{<span\; class="notranslate">\; 2</span>}}}}{{\mathrm{<span\; class="notranslate">\; \&Delta;</span>}}_{\mathrm{<span\; class="notranslate">\; <figure-callout\; id="2"\; label="R"\; filenames="C2005101274840010H2.png"\; state="\{\{state\}\}">R</figure-callout></span>}}^{\mathrm{<span\; class="notranslate">\; 2</span>}}<span\; class="notranslate">\; +</span>{\mathrm{<span\; class="notranslate">\; \&Delta;</span>}}_{\mathrm{<span\; class="notranslate">\; I</span>}}^{\mathrm{<span\; class="notranslate">\; 2</span>}}}\mathrm{<span\; class="notranslate">\; p</span>}{\mathrm{<span\; class="notranslate">\; \&omega;</span>}}^{\mathrm{<span\; class="notranslate">\; 2</span>}}<span\; class="notranslate">\; ,</span>$

where b is the current constant. From this it can be seen that the order $b=\frac{{\mathrm{\&omega;}}^2{m}_2-k_2}{K_f}$ When the vibration displacement of the optical-mechanical module is minimized, when the rotational speed of the optical-mechanical module or the frequency of the external force changes, the vibration-absorbing device can adjust the current constant b to minimize the displacement of the optical-mechanical module. The vibration-absorbing device of the present invention has the advantages of simple structure, few components and easy assembly, so as to suppress the vibration of the optical-mechanical module of the optical disc drive at various speeds, and make the process of reading, writing or erasing disc data smoother and more stable .

Therefore, the vibration-absorbing device of the present invention can solve the problem that the optical-mechanical module of the existing optical disk drive cannot effectively absorb vibration when the rotation speed changes.

Description of drawings

FIG. 1 is a schematic plan view of an existing vibration-absorbing device applied to an optical disc drive;

Fig. 2 is a schematic diagram of a theoretical framework of an existing single speed vibration absorbing device;

Fig. 3 is a schematic diagram of the three-dimensional structure of the vibration absorbing device of the present invention;

4 is a schematic plan view of the vibration absorbing device of the present invention applied to the optical-mechanical module of the optical disc drive;

Fig. 5 is a schematic diagram of the theoretical framework of the vibration absorbing device of the present invention;

Fig. 6A is a system parameter diagram of the vibration absorbing device of the present invention;

Fig. 6B is a vibration simulation analysis diagram of the optical-mechanical module; and

FIG. 6C is a diagram of the simulation and experiment results of optical-mechanical module vibration with the vibration absorbing device of the present invention installed on the optical disk drive, without the vibration absorbing device of the present invention and with a traditional vibration absorbing device.

Detailed ways

Example

Please refer to FIG. 3 and FIG. 4, which respectively show a three-dimensional structure diagram of the vibration absorbing device 21 of the present invention and a schematic plan view of the application of the vibration absorbing device 21 on the optical machine module 23 of the optical disc drive 2. As shown in the figure, the vibration absorbing device 21 is arranged on On the optical-mechanical module 23 of the optical disc drive 2, the vibration generated by the optical-mechanical module 23 during operation at various speeds is suppressed. The vibration-absorbing device 21 includes: a main body 214, a vibration-damping body 212, an elastic body 211, an actuating element 213, and a controller 216 .

In this embodiment, taking the vibration absorbing device 21 combined with the optical-mechanical module 23 of an optical disc drive 2 as an example, the optical-mechanical module 23 is arranged on a carrier 24 combined with a first elastic body 22, and the first elastic The body 22 is connected to the casing 25 of the optical disc drive 2, and the arrangement of the first elastic body 22 can reduce the vibration generated by the optical-mechanical module 23 during operation.

The main body 214 of the vibration absorbing device 21 can be fixed on the optical-mechanical module 23. The main body 214 has an I-shaped structure and has two horizontal parts 2141 and a vertical part 2143. The actuating element 213 can be opposite to the vertical part 2143. For lifting displacement, the damping body 212 is located at least on one side of the vertical portion 2143 and connected to one side of the actuating element 213 . In this embodiment, two sides of the main body 214 each have a guide rod 215 , and the actuating element 213 penetrates through and is slidably disposed on the vertical portion 2143 in a lifting and displacement manner.

The vibration damping body 212 is disposed on the main body 214 in an elastically liftable manner. The vibration damping body 212 is an object with mass or moment of inertia, such as a metal plate or a metal block. In this embodiment, there are two H-shaped damping bodies 212, which are respectively arranged on both sides of the vertical part 2143 of the main body 214, and fixedly connected to both sides of the actuating element 213 respectively, and can follow the actuating element 213 lifting displacement.

The elastic body 211 is disposed on the body 214 to provide the lifting elasticity of the vibration damping body 212 , and the elastic body 211 can be, for example, a spring, a shrapnel, rubber or other equivalent structures with rigidity and damping. In this embodiment, two elastic bodies 211 are sheathed on the guide rods 215 on both sides of the main body 214 and combined with the vibration damping body 212 .

The actuating element 213 is disposed on the main body 214 and connected to the vibration damping body 212 to provide a thrust to push the vibration damping body 212 up and down. In this embodiment, the actuating element 213 is slidably disposed on the vertical portion 2143 through and up and down. The actuating element 213 is composed of a coil 2131 and a magnetic body 2132 to form a voice coil motor (VCM). Of course, in other embodiments Among them, the actuating element 213 can also be, for example, a ceramic actuator (PZT), an electromagnetic actuator or a pneumatic actuator.

The controller 216 controls the thrust output by the actuating element 213 according to the change of the rotational speed of the optical-mechanical module 23 , changes the lifting elasticity of the vibration-damping body 212 , absorbs and reduces the displacement and relative vibration generated by the vibration of the optical-mechanical module 23 .

Please refer to FIG. 5, the controller 216 controls the thrust of the actuating element 213 to be proportional to the operating current of the actuating element 213, the rotational unbalanced force is proportional to the square of the rotational speed of the optical-mechanical module 23, and the vibration-absorbing device 21 The equation of motion with the optomechanical module 23 is expressed as:

m ₁ x ₁ +c ₁ x ₁ +c ₂ (x ₁ -x ₂ )+k ₁ x ₁ +k ₂ (x ₁ -x ₂ )+iK _f ＝F(t)＝pω ² e ^jωt

m ₂ x ₂ +c ₂ (x ₂ -x ₁ )+k ₂ (x ₂ -x ₁ )-iK＝O _f

Wherein, m ₁ is the mass of the optical-mechanical module 23, m ₂ is the mass of the vibrating body 212, x ₁ is the vibration displacement of the optical-mechanical module 23, x ₂ is the vibration displacement of the vibrating body 212, and F(t) is function of rotational unbalanced force with respect to time, p is the amount of rotational unbalance, ω is the rotational speed, k ₁ is the elastic coefficient of the first elastic body 22, k ₂ is the elastic coefficient of the elastic body 211, c ₁ is the elastic coefficient of the first elastic body 22 The damping of , c ₂ is the damping of the elastic body 211 , K _f is the force constant of the actuating element 213 , and i is the operating current of the actuating element 213 .

When i=b(x ₁ -x ₂ ), the vibration displacement x ₁ of the optical-mechanical module 23 can be expressed as:

$<span\; class="notranslate">\; |</span>{\mathrm{<span\; class="notranslate">\; x</span>}}_{\mathrm{<span\; class="notranslate">\; 1</span>}}<span\; class="notranslate">\; |</span><span\; class="notranslate">\; =</span>\frac{\sqrt{{<span\; class="notranslate">\; \{</span><span\; class="notranslate">\; [</span><span\; class="notranslate">\; (</span>{\mathrm{<span\; class="notranslate">\; <figure-callout\; id="2"\; label="k"\; filenames="C2005101274840010H2.png"\; state="\{\{state\}\}">k</figure-callout></span>}}_{\mathrm{<span\; class="notranslate">\; 2</span>}}<span\; class="notranslate">\; +</span>\mathrm{<span\; class="notranslate">\; b</span>}{\mathrm{<span\; class="notranslate">\; K</span>}}_{\mathrm{<span\; class="notranslate">\; f</span>}}<span\; class="notranslate">\; )</span><span\; class="notranslate">\; -</span>{\mathrm{<span\; class="notranslate">\; \&omega;</span>}}^{\mathrm{<span\; class="notranslate">\; 2</span>}}{\mathrm{<span\; class="notranslate">\; m</span>}}_{\mathrm{<span\; class="notranslate">\; 2</span>}}<span\; class="notranslate">\; ]</span>{\mathrm{<span\; class="notranslate">\; \&Delta;</span>}}_{\mathrm{<span\; class="notranslate">\; R</span>}}<span\; class="notranslate">\; +</span>{\mathrm{<span\; class="notranslate">\; <figure-callout\; id="2"\; label="c"\; filenames="C2005101274840010H2.png"\; state="\{\{state\}\}">c</figure-callout></span>}}_{\mathrm{<span\; class="notranslate">\; 2</span>}}\mathrm{<span\; class="notranslate">\; \&omega;</span>}{\mathrm{<span\; class="notranslate">\; \&Delta;</span>}}_{\mathrm{<span\; class="notranslate">\; I</span>}}<span\; class="notranslate">\; \}</span>}^{\mathrm{<span\; class="notranslate">\; 2</span>}}<span\; class="notranslate">\; +</span>{<span\; class="notranslate">\; \{</span>{\mathrm{<span\; class="notranslate">\; <figure-callout\; id="2"\; label="c"\; filenames="C2005101274840010H2.png"\; state="\{\{state\}\}">c</figure-callout></span>}}_{\mathrm{<span\; class="notranslate">\; 2</span>}}\mathrm{<span\; class="notranslate">\; \&omega;</span>}{\mathrm{<span\; class="notranslate">\; \&Delta;</span>}}_{\mathrm{<span\; class="notranslate">\; R</span>}}<span\; class="notranslate">\; -</span><span\; class="notranslate">\; [</span><span\; class="notranslate">\; (</span>{\mathrm{<span\; class="notranslate">\; <figure-callout\; id="2"\; label="k"\; filenames="C2005101274840010H2.png"\; state="\{\{state\}\}">k</figure-callout></span>}}_{\mathrm{<span\; class="notranslate">\; 2</span>}}<span\; class="notranslate">\; +</span>\mathrm{<span\; class="notranslate">\; b</span>}{\mathrm{<span\; class="notranslate">\; K</span>}}_{\mathrm{<span\; class="notranslate">\; f</span>}}<span\; class="notranslate">\; )</span><span\; class="notranslate">\; -</span>{\mathrm{<span\; class="notranslate">\; \&omega;</span>}}^{\mathrm{<span\; class="notranslate">\; 2</span>}}{\mathrm{<span\; class="notranslate">\; m</span>}}_{\mathrm{<span\; class="notranslate">\; 2</span>}}<span\; class="notranslate">\; ]</span>{\mathrm{<span\; class="notranslate">\; \&Delta;</span>}}_{\mathrm{<span\; class="notranslate">\; I</span>}}<span\; class="notranslate">\; \}</span>}^{\mathrm{<span\; class="notranslate">\; 2</span>}}}}{{\mathrm{<span\; class="notranslate">\; \&Delta;</span>}}_{\mathrm{<span\; class="notranslate">\; <figure-callout\; id="2"\; label="R"\; filenames="C2005101274840010H2.png"\; state="\{\{state\}\}">R</figure-callout></span>}}^{\mathrm{<span\; class="notranslate">\; 2</span>}}<span\; class="notranslate">\; +</span>{\mathrm{<span\; class="notranslate">\; \&Delta;</span>}}_{\mathrm{<span\; class="notranslate">\; I</span>}}^{\mathrm{<span\; class="notranslate">\; 2</span>}}}\mathrm{<span\; class="notranslate">\; p</span>}{\mathrm{<span\; class="notranslate">\; \&omega;</span>}}^{\mathrm{<span\; class="notranslate">\; 2</span>}}$

where b is the current constant; it can be seen that $b=\frac{{\mathrm{\&omega;}}^2{m}_2-k_2}{K_f}$ , the vibration displacement of the optical-mechanical module 23 is the smallest. When the rotational speed of the optical-mechanical module 23 or the frequency of the external force changes, the vibration-absorbing device 21 can adjust b so that the vibration of the optical-mechanical module 23 is the smallest. Therefore, the vibration-absorbing device 21 of the present invention has the advantages of simple structure, few components, and easy assembly, so that the optical-mechanical module 23 of the optical disc drive 2 can effectively reduce vibration at various speeds, and the process of reading and writing the disc is smoother. Stablize.

Please refer to FIG. 6A to FIG. 6C. FIG. 6A is a system parameter diagram of the vibration absorbing device 21 of the present invention, and FIG. 6B is an optical-mechanical module with the vibration absorbing device of the present invention installed on the optical disk drive, without the vibration absorbing device of the present invention, and with a traditional vibration absorbing device. Vibration simulation analysis diagram, Fig. 6C is a simulation and experiment result diagram of optical-mechanical module vibration with the vibration-absorbing device of the present invention installed on the CD-ROM, without the vibration-absorbing device of the present invention and with the traditional vibration-absorbing device. As shown in the figure, it can be seen that the traditional vibration absorbing device (solid line) can only effectively absorb vibration around a certain fixed frequency, and the present invention can move the trough of the curve with the speed or external force frequency (Fig. Embodiment of the invention), and the vibration absorbing device 21 of the present invention increases the vibration absorbing efficiency by 38% and 42% at 6000 rpm and 10000 rpm respectively compared with the traditional vibration absorbing device.

In summary, the vibration absorbing device 21 of the present invention is composed of a body 214, an actuating element 213, a vibration damping body 212, an elastic body 211 and a controller 216. The rigidity and damping of the elastic body 211 can be regarded as the k ₂ of the system and c ₂ , the mass of the damping body 212 is regarded as the m ₂ of the system, because the thrust of the actuating element 213 is multiplied by the current i and the force constant K _f , it can be known from the above theory and equation that the actuator can be controlled by adjusting the current The moving element 213 minimizes the vibration of the optical-mechanical module 23 of the optical disc drive 2 at different rotational speeds, achieves the effect of vibration absorption, and solves various deficiencies in the prior art, and has high industrial application value.

Claims (10)

1. A vibration-absorbing device, which is arranged on the optical-mechanical module of the optical disc player, suppresses the vibration of the optical-mechanical module during the operation of each speed, it is characterized in that the vibration-absorbing device comprises: The main body is fixed on the optical-mechanical module; The damping body is elastically arranged on the body; an elastic body is arranged on the body to provide the lifting elasticity of the vibration damping body; an actuating element, arranged on the body and connected to the vibration damping body, provides a thrust to push the vibration damping body up and down; and The controller controls the thrust output by the actuating element according to the change of the rotational speed of the optical-mechanical module, and then changes the lifting elasticity of the vibration-damping body to absorb and reduce the displacement and relative vibration of the optical-mechanical module. 2. The vibration absorbing device according to claim 1, wherein the elastic body is a spring, a shrapnel or rubber. 3. The vibration absorbing device according to claim 1, wherein the vibration damping body is a metal plate or a metal block with mass. 4. The vibration absorbing device according to claim 1, wherein the vibration damping body has a metal plate or a metal block with a moment of inertia. 5. The vibration-absorbing device according to claim 1, wherein the vibration-damping body has an H-shaped structure. 6 . The vibration absorbing device according to claim 1 , wherein the number of the vibration damping bodies is two, which are respectively arranged on two sides of the vertical portion of the main body. 6 . 7. The vibration absorbing device according to claim 1, wherein the body is in an I-shaped structure. 8. The vibration absorbing device according to claim 1, wherein the main body is an I-shaped structure having two horizontal parts and a vertical part, the actuating element can move up and down relative to the vertical part, and the vibration damping body Located on at least one side of the vertical portion, connected to one side of the actuating element. 9 . The vibration absorbing device according to claim 1 , wherein a guiding rod is further provided on the body for sheathing the elastic body. 10 . 10. The vibration absorbing device according to claim 1, wherein the actuating element is a voice coil motor, a ceramic actuator, an electromagnetic actuator or a pneumatic actuator.

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