TWM258395U - Vibration damping device for optical disk drive - Google Patents

Description

M258395 ------- V. Creation Instructions (1) [Technical Field to which the New Type belongs This invention relates to a dynamic vibration damping device for an optical disc drive, which can reduce the rotation of the optical disc 2 which refers to an optical disc drive [previous technology ] Ning Sheng's vibration. With the continuous progress of optical information storage media technology, it is becoming faster and faster, and the rotation of the spindle motor is the main factor for the speed of the optical disc drive. Due to the disc manufacturing ^ = low, which affects the read coincidence of the optical disc drive, leading to the imbalance of the disc, the master ° ^ horse! = Centrifugal bias caused by the disc imbalance when the centroid does not always turn ^ moving the disc height When the speed and speed rotate, the disc and the surrounding air friction produce two = f = drama, and the high problem of the disc becomes serious, and excessive vibration will cause the lice j flow to reduce the vibration and other problems. Therefore, it is necessary to effectively suppress the vibration to read the information on the disc only with the ability to read the first film. The optical disc drive can be stabilized. In theory, in order to eliminate the vibration caused by the rotation of the main shaft motor, a balance system and a dynamic vibration reduction system such as a rotation and a rotation are generally used. ; Such as the increase in the quality of the plate, the overall quality of the automatic disc player, and the use of light due to the quality of ^. The automatic balance system is to compensate for the unbalance of the disc when the ball balancer is rotated by setting the East + Heng Jie with several rolling balls at the position of Dexian Temple. Due to the large friction between the self-aligning effects of the ball, the actual vibration system using the ball and the turntable is added to the base-group; the mass body is composed and vibrated. The natural frequency of the device is the same as that of the substrate on page 5. M258395 5. Creation instructions (2) When the vibration frequency is consistent, the substrate's smuggling + 丞 丞 vibration will tend to zero, so that the substrate is transmitted by the spindle motor rotation. $ 其 # The vibrations on the main pulse of the heart can be absorbed by the spring and the mass. / First, the optical read head drive assembly placed on the side of the base plate makes the installation :, Taiwan early (including the optical pick-up head, the read head drive assembly, and the center of mass of the main shaft of the base plate are biased toward its installation There is: f of the optical pickup driving assembly, so that the isolation pad on this side bears more pressure than the optical pickup. The opposite side of the assembly, which causes the substrate to tilt to the heavier side, and the axis motor It cannot support the rotation of the optical disc horizontally, which affects the normal operation of the optical disc drive. This requires changing the hardness and other properties of the vibration isolation pad on the side with a larger force to support the substrate more strongly. However, the following The problem is so ^ use ^ less two different vibration isolation pads, adding additional costs. _ 凊 Refer to the first figure, which is the dynamic vibration reduction used in the conventional optical disc drive: set. By mounting on the base plate 2 A number of vibration damping pads 3a and a ring-shaped vibration damping sheet 3 (including the spindle motor 4, the optical pickup 5 and the optical pickup driving group 46, etc.) are included to reduce the normal rotation speed of the spindle motor. Vibration transmitted to the substrate 2. At the same time, several vibrators 2 a ′ are installed between the substrate 2 and a frame (not shown) to block the vibrations from the outside of the optical disc drive, and finally the purpose of reducing the vibration generated by the substrate 2 when the J 2-axis motor rotates is achieved. However, the structure of the vibration damping sheet is more complicated, and the number of vibration damping pads is larger, and because the offset of the center of mass of the substrate cannot be adjusted, different vibration damping pads need to be used, which has high manufacturing costs and inconvenient assembly. insufficient. [New content] The purpose of this creation is to provide a simple structure and low cost optical disc

Page 6 M258395 V. Creation instructions (3) Machine vibration reduction device.

The creative machine includes an optical frame, the base reading head, a set including a reduction mounted on an optical reading and conventional film, a vibration damping pad, and a pick-up head and a main shaft equipped with an optical reading list, [manufacturing technology] The Fang Xue reading single board is installed on the optical reading vibration plate, and the fetching head is compared with the main technology to form an additional motor of the connected fetching unit. The solution is a kind of optical disc bearing optical frame, the optical head driving assembly and a One less vibration pad, the car is connected to the side by the motor, the original% — the disc made of the disc and the side of the line, using the center of mass, and convenient. Assembling side of the system base plate Read single The main vehicle is equipped with a base plate of a vibration damping machine. The vibration damping is mounted on the base vibration damping plate so that the elements of the vibration damping unit are included. The pass minus. The weight of the device mining board, the device is assembled, one by one, optical vibration damping device, vibration damping, vibration damping, optical reading, adjustment, and structure.

Please refer to FIG. 2 and FIG. ^, Which are perspective views of the created optical disc drive vibration damping device 20 after being assembled to the optical disc drive 100 shovel. The optical disc drive 100 includes an optical reading unit 110, a substrate 120 carrying the optical reading unit 110, a four-vibration pad 130, and a frame 140. The substrate 120 is mounted on the frame U0 through a vibration-isolating 13-ampere microphone. on. The optical reading unit 110 includes an optical reading head 112, a reading head driving assembly 114, and a spindle motor i i 6. The vibration damping device 20 is provided on the optical pickup I? On the substrate connected to the spindle motor 116 and opposite to the optical pickup drive assembly 14, it includes a damping plate 22 and two damping pads 24. The damping plate 22 is passed through the damping pad 24A. The vibration damping sheet 22 on the substrate 120 has a rectangular surface (not labeled). Vibration damping plate 2 2 The center of mass is symmetrically arranged on the two sides of the center.

Page 7 M258395

Mounting hole 22 0 is shown to install vibration damping 塾 24) An opening 2 2 2 is formed through the center of mass of the vibration damping sheet 22. —The connection line of the center of the mounting hole 2 2 0 (the mounting hole 2 2 0 is near the edge of the vibration damping plate 22, at the same time in May, the fourth shoulder j, the cylinder 1 includes two 2: the vibration pad 24 is hollow The elasticity of the structure is 2'2,-from the neck 242 ;; the convex-= part 24 °: the protruding neck through hole 246. The flange 244, a screw 26 for ^ Η α2 ^ 2 ^^ 242 ^ Γ1 ^ ^ ^ ^ ^ 22 Λ Π 222 is connected to Ansang hole 220, I section 240 and flange 244 stop vibration reduction: 22 'screw 26 through the through hole 246 of the damping pad 24 will damp vibration '塾 24 is fixed to the base plate 12. It is on the two-side with the optical pickup drive unit. The vibration damping 塾 24 avoids direct contact between the damping plate 22 and the screw 26 1 plate ，, thus eliminating the impact of these components on the film. : The possibility of Bilibili. The wooden base plate 120 / optical reading unit 110 has a certain mass, and it forms a main system with a vibration isolation pad with a certain coefficient of elasticity, which is fixed in the rack by screws 1 3 110, it can isolate the vibration transmitted from the outside to the frame 11 and transmitted to the base plate 120. The damping sheet 22 has a certain mass and the damping pad 24 having an elastic coefficient to form an additional system. It can reduce the vibration transmitted to the main system when the spindle motor rotates at high speed. The main system and the additional system form a system of degrees of freedom. When the optical disc drive is working, the spindle motor 116 drives the disc to rotate. When the spindle motor 116 rotates to the highest speed , Due to the increased friction between the disc and the surrounding air, and the vibration caused by the increase of the spindle motor 116's own speed

Page 8 M258395 V. Creative Instructions (5) Makes the vibration transmitted to the substrate 1 2 0 quite large, and causes the vibration of the main system ', which makes it difficult for the optical pickup 11 12 to accurately read the information on the disc. At this time, when the natural frequency f 2 of the additional system is consistent with the vibration frequency of the main system ^, the vibration generated by the main system at the maximum speed of the spindle motor 20 is absorbed by the additional system, so that the optical pickup 丨 丨2 The information on the disc can be read smoothly. At the same time, when the vibration damping device 20 is mounted on the substrate 120 on the side opposite to the optical pickup drive assembly 11 4, since the vibration damping sheet 22 has a certain mass%, the pressure on the vibration damping pad 24 on the side increases. The pressure on the vibration damping pad 丨 30 is balanced, so that the deviation of the center of mass of the substrate 1 2 0 caused by the installation of the optical pickup drive assembly 114 is adjusted, that is, the quality of the substrate 1 2 〇 is adjusted. The position on the connection line between the reading head 112 and the spindle motor 116, so that the spindle motor 丨 i 6 can horizontally support the rotation of the optical disc. The quality of Jin Fuli's system "11, the elastic system touches the" vibration frequency ^ II: 2, the coefficient of elasticity "2, and the natural frequency M is adopted as follows, the system's mass mi and the coefficient of elasticity ki are the predetermined values of fkt. In the high state, the vibration frequency of the main system is as follows: Use: Type section-including 1 plate; The natural frequency of the 20Vl addition and system meets W 丨, and considers the need to adjust the center of mass of the main system of the base plate 120. Select the coefficient of elasticity k2, so as to form a Bailey m2 system that can play the role of vibration absorption and so on. J moxibustion and withering are additional benefits for the center of mass. The ones described above are only the preferred embodiments of this creation. For example, M258395

Page ίο M258395 Schematic diagram and description [Simplified diagram] The first diagram is a perspective view of the vibration damping device of the optical disc drive of the conventional technology. The second picture is a three-dimensional exploded view of the original vibration damping device of the optical disc drive before the optical disc drive is assembled. The third picture is a perspective view of the original optical disc drive vibration damping device assembled into the optical disc drive. The fourth figure is a cross-sectional view taken along the IV-IV direction of the third figure. [Description of main component symbols]

Vibration damping device 20 Vibration damping plate 22 Vibration damping pad 24 Screws 26, 132 Optical disc drive 100 Optical reading unit 110 Optical reading head 112 Optical reading head drive assembly 114 Spindle motor 116 Substrate 120 Vibration isolation pad 130 Rack 140 Installation? L 220 opening 222 base 240 neck 242 flange 244 through hole 246

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Claims (1)

M258395 VI. Scope of patent application ------- 1 · A vibration damping device for an optical disc drive, the optical disc drive includes-where, a base carrying an optical reading unit,-dry Λ +-立 城 ^ ^ .. -A frame, the main motor of the substrate; Γ page, the reading sheet 71 further includes-an optical reading head, a pre-entry head picking drive assembly and the vibration damping device include: a vibration plate, Until it is described, as described, as described, as described, as described, as described, as described, as described, as described, described in the following: I save Wenling on the substrate on the side where the optical pickup head is connected to the spindle. Please refer to the light bang described in item 1 of the patent scope, ,, Η, and A L ♦ machine vibration damping device, in which the vibration piece is a long structure. The light bee described in item 1 of the patent scope, the vibration device has two damping pads. Sakiki vibration damping device, in which the light beam described in item 3 of the claimed patent ^ μ a. Zhuji vibration damping device, the vibration plate of Lizhong has two mounting holes, said two & Installed on the substrate. 'The vibration pad is formed by the two mounting holes of the optical vibration diaphragm described in item 4 of the patent scope of the installation hole ^ machine vibration damping device vibration pad is an elastic cavity The light-vibration device described in item 1 of the structure is patented. The machine ’s vibration-damping device further includes a number of vibration isolation or vibration-damping devices, where / 'the substrate passes through the The disc described in item 4 of the May patent dry enclosure = the connection of the hole through the mass machine through the vibration damping sheet = the vibration device 凊 the light in the patent scope item 1 and the vibration pad are elastic pulse rides Note η _ Vibration damping device M258395 VI. The patent application scope and other vibration isolation pads are installed on the frame. 9. The vibration damping device of the optical disc drive according to item I in the scope of the patent application, wherein the natural frequencies of the damping plate and the damping pad are the same as the vibration frequency of the substrate at the maximum speed of the spindle motor. I 0. The vibration damping device of the optical disc drive according to item I of the scope of patent application, wherein the damping sheet and the damping pad are mounted on a substrate on the side opposite to the optical pickup driving assembly. Page 13