JPH02249192A - Vibrationproofing device for disk player - Google Patents

Abstract

PURPOSE:To improve a vibration proofing effect and treatmentability by providing a viscoelastic body in which a screw hole supported with either a disk driving mechanism or a supporting body, a rotation adjusting member, and a mounting member which mounts the rotation adjusting member on the disk driving mechanism part or the supporting body on the other side rotatably freely. CONSTITUTION:On end of a cylindrical viscoelastic body 20 formed with a viscous body such as rubber, etc., is fixed on a supporting member 10 mounted at a cabinet, and the screw hole 21 formed by fitting, for example, a sleeve member is provided at the other end of the viscoelastic body 20, and a cylindrical rotation adjusting part 22 is inserted to the screw hole 21. A screw part 23 is provided on one end of the rotation adjusting part 22 corresponding to the screw hole 21 of the viscoelastic body 20, and a rotary operating tool, for example, an operating part 25 with which a driver 24 is engaged is provided on the other end. And the mounting member 26 is inserted to the inside of the rotation adjusting member 22. In such a way, it is possible to improve the vibraionproofing effect and the treatmentability.

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Field of Industrial Application) The present invention relates to a CD player that uses, for example, a compact disc (CD) as a recording medium.

Regarding optical disc players such as CD-ROM devices,
In particular, the present invention relates to a vibration isolating device for a disc player used to elastically install a disc drive mechanism that drives the disc with respect to a support such as a housing.

(Prior Art) Conventionally, in a CD player, as shown in FIG. Turntable 3. There is a disc protection device in which a disc drive mechanism 5 comprising a reproducing pickup 4 and the like is sealed. Such a CD player is provided with a disc case insertion lower for inserting and removing a disc in its housing 6, and the disc case 2 is inserted through the disc insertion lower and mounted on the disc drive mechanism section 5. This disk drive mechanism section 5 is installed on a chassis 8 via a vibration isolator 9, and is mounted on a housing 6.
The equipment is installed so that vibrations transmitted through the equipment are vibration-isolated.

FIG. 7 shows such a conventional vibration isolating device for a disc player, in which a plurality of support members 10 are provided in the housing 6 so as to face the chassis 8. As shown in FIG.

A viscoelastic body 9a such as rubber and a spring 9b are interposed between the support member 10 and the chassis 6.

As shown in FIG. 8, the viscoelastic body 9a has one end fitted into the support member 10, and the other end fixed to the chassis 10 via a fixing stud 9c and a set screw 9d. Absorbs vibrations due to energy loss (internal damping) effect. On the other hand, the spring 9b has one end connected to the support member 1.
0 and the other end is connected to the chassis 8, and its elastic force prevents the disk drive mechanism section 5 from tilting with respect to the housing 6, and also ensures a predetermined installation interval.

As a result, the viscoelastic body 9a and the spring 9b cooperate to support the disk drive mechanism section 5 in a predetermined position with respect to the housing 6 (a state in which some elastic deviation is allowed). , which achieves vibration absorption.

However, in the vibration isolating device for a disc player described in item 1, since the vibration is absorbed by the viscoelastic body 9a and the position of the installation interval etc. is controlled by the spring 9b, it is difficult to further improve the vibration isolating effect. The problem was that it was difficult. That is, the viscoelastic body 9a is modeled as a spring A and a dash board l-B connected in parallel as shown in FIG. 9, and its spring constant (complex spring constant) k
is defined in complex number representation as = 1 + 2 H (1: imaginary unit) (1). Here, "1." and "2" are the springs A, respectively.
, the storage spring constant of dashbot B.

There is a loss spring constant.

On the other hand, spring 9b is connected in parallel with spring A,
If the spring constant is ks, when viewed as the same stem, the spring constant (complex spring constant) can be obtained by adding the storage spring constant.
ksys is ksys = (k 1+ to 2)+ to 2+ ”(2
). Then, the loss coefficient 1 obtained from the ratio of the real part and the imaginary part of this complex spring constant is calculated from equation (2) as follows: 1 = 2 / 1 + 7 ... (
3). The larger the value of this loss coefficient 1, the lower the resonance magnification indicated by Q in Fig. 10, and the more vibration-proofing effect (reducing the amount of vibration transmitted) can be obtained, but (3) As is clear from the equation, the presence of the spring 9b reduces the spring constant kT, making it difficult to improve the vibration damping effect.

Therefore, it is conceivable to remove the spring 9b and configure the viscoelastic body 9a to perform both vibration absorption and position regulation only. However, according to this, molding and manufacturing of the viscoelastic body 9a is very troublesome because it is necessary to mold the viscoelastic body 9a with high precision and to set the hardness with high precision in order to regulate the position. At the same time, a problem arises in that the viscoelastic body 9a becomes larger.

In addition, in the above vibration isolating device for a disc player, when the housing 6 is tilted, the direction of gravity applied to the disc drive mechanism section 5 changes, and the direction of the elastic force of the viscoelastic body 9a and the spring 9b changes. Due to the misalignment of the relative position between the disk drive mechanism section 5 and the housing 6, effective vibration isolation becomes difficult, making it difficult to install in a position other than the specified installation form, and making it difficult to handle. The problem was that it was complicated.

The same situation applies to CD players in which the disc is directly mounted on the disc drive unit. As recording media, FD (floppy disk) and H
The same applies to magnetic disk players using D (hard disks).

(Problems to be Solved by the Invention) As described above, with conventional disc player vibration isolators, it is difficult to improve the vibration isolating effect, and there are restrictions on the form of the installation posture, making it difficult to handle. The problem was that it was complicated.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a vibration isolating device for a disc player that has a simple structure, can improve the vibration isolating effect, and can improve the ease of handling. With the goal.

[Structure of the Invention] (Means for Solving the Problems) The present invention provides a vibration isolating device for a disc player in which a disc drive mechanism unit for driving a disc is elastically installed with respect to a support. A viscoelastic body provided with a screw hole that is supported by either the mechanism part or the support body, and a rotation adjustment member provided with a screw part that is adjustably screwed into the screw hole of the viscoelastic body. , a mounting member provided coaxially with the rotation adjusting member and rotatably attaching the rotation adjusting member to the other of the disk drive mechanism section or the support body.

(Function) According to the above configuration, the disk drive mechanism section uses only a viscoelastic body as an elastic body by setting a predetermined interval by setting the installation interval with respect to the support body or adjusting the rotation of the rotation adjustment member. In addition to absorbing vibrations from the support, a mutual position regulating effect can be obtained. Therefore, compared to the conventional one, the loss factor can be reduced as much as possible, and the vibration damping effect can be improved.

Furthermore, since the distance between the disk drive mechanism and the support body can be easily adjusted, it is possible to accommodate various installation postures, so that ease of handling can be improved as much as possible.

(Example) Hereinafter, an example of the present invention will be described in detail with reference to the drawings.

1 and 2 show a vibration isolating device for a disc player according to an embodiment of the present invention.

However, here, the same parts as in FIGS. 5 and 6 are given the same reference numerals, and detailed explanation thereof will be omitted.

That is, the housing 6 similarly includes a plurality of support members 10.
are attached at predetermined intervals, and one end of a cylindrical viscoelastic body 20 made of a viscous material such as rubber is fixed to this support member 10. The other end of the viscoelastic body 20 is provided with a screw hole 21 formed by fitting, for example, a sleeve member into the screw hole 21, into which a cylindrical rotation adjustment member 22 is inserted. A screw portion 23 is provided at one end of this rotation adjustment member 22.
is provided corresponding to the screw hole 21 of the viscoelastic body 20, and the other end is provided with an operating portion 25 to which a rotary operating tool, such as a driver 24, is engaged. A mounting member 26 is inserted into the rotation adjustment member 22 . For this installation, the member 26 has a threaded portion 26a formed at its tip.
This threaded portion 26a is screwed into a threaded hole 8a formed in the chassis 8 to support the rotation adjustment member 22 in a freely rotatable manner relative to the chassis 8.

In the above configuration, the distance H between the chassis 8 and the support member 10
When setting the rotation adjustment member 2, first rotate the driver 24.
2 and rotate the arrows W and X.

Then, the rotation adjustment member 22 rotates around the attachment member 26, and the threaded engagement between the threaded portion 23 and the screw hole 21 of the viscoelastic body 20 is adjusted, and the rotation adjustment member 22 is adjusted to move in the directions of arrows Y and Z. Ru.

As a result, the distance H between the chassis 8 and the support member 10 is adjusted via the viscoelastic body 20 and the rotation adjustment member 22, and the installation distance between the disk drive mechanism section 5 and the housing 6 is thereby variably set.

In this manner, the vibration isolating device for a disc player has a viscoelastic body 20 having a screw hole 21 attached to the support member 10, and is rotatably supported by the chassis 8 with respect to the screw hole 21 of the viscoelastic body 20. The screw portion 23 of the rotation adjustment member 22 is screwed together in a freely adjustable manner, and the installation interval between the support member 10 and the chassis 8 can be variably adjusted by adjusting the rotation of the rotation adjustment member 22. According to this, it is possible to absorb vibrations from the casing and obtain a mutual position regulating effect by using only the viscoelastic body 20 without using a spring as an elastic body, so that the shape is substantially the same as that of the conventional one. After ensuring the dimensions, the loss factor can be reduced as much as possible, and the vibration isolation effect can be improved.

Furthermore, since the distance between the disk drive mechanism section 5' and the housing 6 can be easily finely adjusted, the distance can be adjusted to accommodate various installation postures of the disk player, making it possible to handle the disk player as easily as possible. It can contribute to improving sexual performance.

It should be noted that the present invention is not limited to the above-mentioned embodiments, but can also be configured as shown in FIGS. 3 and 4. However, in FIGS. 3 and 4, the same parts as those in FIG.

In FIG. 3, an arm portion 27 for rotational operation is formed integrally with the screw portion 23 of the rotation adjusting member 22 so as to be located outside the viscoelastic body 20, and the driver 24, the rotational adjustment can be easily made by hand or the like.

FIG. 4 shows that an arm 27 for rotational operation is formed so as to be located outside the viscoelastic body 20 so as to be integral with the threaded portion 23 of the rotation adjustment member 22, and the tip of this arm 27 is used for driving. A gear portion 28 is formed. A drive gear 30 driven by a drive motor 29 is meshed with the gear part 28 of the arm part 27, and the rotation is adjusted by the driving force of the drive motor 29. On the other hand, the chassis 8 is provided with a detected portion 8b, and a support member 10 facing the detected portion 8b is provided with an optical sensor 31 such as a photosensor.
Place them facing each other. As shown in FIG. 5, the optical sensor 31 is
The distance between the chassis 8 and the support member 10 is detected in accordance with the amount of light shielded by the detected portion 8b, and the detection signal is outputted to the deviation counter 33 via an analog-to-digital (A/D) converter 32. The deviation counter 33 generates a drive signal corresponding to the signal from the A/D converter 32 and the pulse command from the control unit 34, and outputs this drive signal to the digital-to-analog (D/A) converter 35 to the drive motor. Then, the drive motor 29 is feedback-controlled. This results in
The rotation adjustment member 22 is rotationally driven by the driving force of the drive motor 29 being transmitted through the drive tooth width 30 and the gear part 28 of the arm part 27, and sets the distance between the chassis 8 and the support member 10.

Further, in the above embodiment, the viscoelastic body 20 is configured to be supported by the support member 10 on the housing side, but the structure is not limited to this, and it may be configured to be attached to the chassis 8 on the disk drive mechanism side, for example. It is possible.

Furthermore, in the above embodiment, the disk drive mechanism section 5 and the housing 6
In order to elastically install the disk drive mechanism section 5 on the chassis 8, the support member 1 is mounted on the chassis 6.
0 is attached and installed with these interposed, the configuration is not limited to this, and it is also possible to configure so as to install directly.

Therefore, it goes without saying that the present invention is not limited to the above embodiments, and that various modifications can be made without departing from the spirit of the invention.

[Effects of the Invention] As described in detail below, according to the present invention, it is possible to simplify the structure, improve the vibration isolation effect, and improve the ease of handling.
It is possible to provide a vibration isolating device for a disc player that can achieve the following.

[Brief explanation of drawings]

1 and 2 are a cross-sectional view and an exploded perspective view showing a vibration isolating device for a disc player according to an embodiment of the present invention, and FIG.
5 through 5 are cross-sectional views and block portions showing other embodiments of the present invention, and FIGS. 6 through 10 are views shown to explain the problems of the prior art. 5... Disk drive mechanism section, 6... Housing, 8...
Chassis, 10... Supporting member, 20... Viscoelastic body,
21... Screw hole, 22... Rotation adjustment member, 23... Screw part, 24... Driver 25... Operating unit, 26
...Mounting part, 26a...Screw part, 27...Arm part, 28...Gear part, 29...Drive motor, 30...
- Drive gear, 31... Optical sensor, 32... A/D converter, 33... Deviation counter, 34... Control unit, 3
5...D/A converter. Applicant's agent Patent attorney Takehiko Suzue

Claims (2)

[Claims] (1) In a vibration isolating device for a disc player in which a disc drive mechanism unit for driving a disc is elastically installed on a support body, a screw hole supported by either the disc drive mechanism unit or the support body is provided. a rotation adjustment member provided with a screw portion that is adjustable and screwed into a screw hole of the viscoelastic body; and a rotation adjustment member provided coaxially with the rotation adjustment member; A vibration isolator for a disc player, comprising: a mounting member for rotatably mounting the member to the other of the disc drive mechanism section or the support body. (2) The vibration isolating device for a disc player according to claim 1, wherein an arm portion for adjusting the rotation of the rotation adjustment member is provided integrally with the screw portion and outside the viscoelastic body.