JP2916748B2 - Anti-vibration support device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an anti-vibration support device,
More specifically, the present invention relates to an anti-vibration support device for supporting a main body of a recording / reproducing apparatus (hereinafter, referred to as a mechanical deck) for reading / writing a recording medium such as a compact disk or a floppy disk in a casing.

[0002]

2. Description of the Related Art In recent years, with the advancement of technology, a recording / reproducing apparatus for a recording medium such as a compact disk (hereinafter, referred to as a CD) has become smaller and portable. Signals are recorded on the recording medium at high density, and the use of the recording / reproducing device for reading and writing the signal in a state where the device is tilted or subjected to vibration while being carried on a car or mounted on a car,
A predetermined signal cannot be picked up, causing a malfunction such as a sound skip.

Therefore, in general, in a recording / reproducing apparatus, a mechanical deck MD is mounted in a casing 1 via an anti-vibration support device 15, as shown in FIGS. Frame 4 is supported. As shown in cross-sectional views in FIGS. 14 and 15, the conventional anti-vibration support device has, at both ends, engaging portions 53 and 54 that are engaged with projections 51 and 52 provided opposite to the casing 1. Frame with a mechanical deck attached in the middle
Is provided between the engaging portions 53 and 54 engaged with the protrusions 51 and 52 and the engaging portions 55 engaged with the frame 4. There was a deformed cylindrical body in which the portion 56 was formed. The conventional anti-vibration support device shown in FIG. 14 fixes the engaging portion 53 to the projection 51 and movably engages the engaging portion 54 with the projection 52.
In the conventional anti-vibration support device shown in (1), the engaging portions 53 and 54 are movably engaged with the projections 51 and 52.

[0004] Further, as another conventional anti-vibration support device,
As shown in FIG. 16, an engaging portion 57 engaged and fixed to the projection 51 is provided.
And a first member 59 formed continuously with a flexible portion 58 curved in an R-shape, an engaging portion 60 engaged with and fixed to the projection 52, and an annular groove 61 engaged with the hole 12 of the frame 4. The formed second member
There was something composed of 62. Therefore, the conventional vibration isolating and supporting apparatus is provided with the mechanical deck MD by the flexible portions 56 and 58 which are formed to be curved in a round shape.
Provided cushioning and support for the frame 4 on which was mounted.

[0005]

However, the above-mentioned prior art has the following problems.

In the above-described vibration isolating support device, the mechanical deck is buffered and supported by a flexible portion that is curved in an R-shape. Therefore, when the flexible portion is hardened to maintain the mechanical deck at a predetermined height, vibration is attenuated. If the flexible part is softened to increase the vibration damping ability, the mechanical deck cannot be held at a predetermined height, and the inner side of the flexible part will be damaged when an overload such as impact is applied. However, there is a problem that the buffering capacity is reduced due to contact with each other.

Further, in the above-described conventional anti-vibration support device, when it is compressed and deformed in the vertical direction by receiving vibration, the diameter of the flexible portion formed into a round shape is enlarged, and it comes into contact with the peripheral portion. Therefore, there is a problem that the damping ability is impaired.

Further, the conventional anti-vibration support device has a small holding force against the lateral movement of the frame to be supported by the flexible portion, and holds the mechanical deck at a predetermined position in the casing when the recording / reproducing device is inclined. There is a problem that a spring or the like is required to perform the operation.

Further, in the conventional vibration isolating and supporting apparatus, an elastic material such as rubber is poured into a mold at the time of fabrication. However, since the flexible portion is curved in a round shape, a metal which may occur during molding is formed. It is difficult to improve the accuracy of the thickness of the flexible portion due to misalignment of the mold and the like, and in addition, burrs due to the parting line of the mold significantly change the set attenuation characteristics due to being formed on the flexible portion. There was a problem.

The present invention has been made in view of the above problems, and an object of the present invention is to provide an anti-vibration support device having a high damping ability, which can support a mechanical deck at a predetermined position while protecting the mechanical deck from the influence of vibration, inclination, and the like. It is the purpose. It is another object of the present invention to provide an anti-vibration support device that does not lose its damping ability by being in contact with the surroundings when deformed by vibration. Still another object of the present invention is to provide a vibration-proof support device which can obtain a desired vibration damping capability with high precision and can be easily formed.

[0011]

In order to solve the above-mentioned problems, a vibration-damping support device according to the present invention is provided in a cylindrical or columnar shape which is engaged with engaging members protruding from each other in a casing. A cylindrical frame engaging body having a predetermined distance between the casing engaging body and an outer wall of the casing engaging body engaged with the frame on which the recording / reproducing device is mounted; an outer wall of the casing engaging body and a frame; A continuous vibration absorbing portion between the inner wall of the engaging body and the inner wall of the engaging body is formed of an elastic body.

[0012] The casing engaging body may be formed in a double structure by an elastic body having different hardness between the inside and the outside.

[0013] The vibration absorbing portion may be formed as a film extending perpendicular to the outer wall of the casing engaging member and the inner wall of the frame engaging member, or may be inclined with respect to both side wall surfaces. Can be formed in a film shape extending like this.

[0014] The vibration absorbing portion may be provided with a through hole or a notch, or provided with a rib on one or both surfaces.

[0015]

With the above construction, the frame on which the mechanical deck is mounted is engaged with the frame engaging member and is supported by the casing engaging member engaged with the casing engaging member via the vibration absorbing portion. When the mechanical deck receives vibration, the vibration absorbing portion formed continuously between the frame engaging body and the casing engaging body absorbs and attenuates the vibration by elastically deforming. When the vibration received by the mechanical deck is large, the cylindrical frame engaging body comes into contact with the casing and the cylindrical or columnar casing engaging body, thereby restricting the movement of the frame by a predetermined amount or more.

In the case where the casing engaging body is formed in a cylindrical shape, or has a double structure by an elastic body having different hardness between the inside and the outside, or in the case where a through hole, a notch or a rib is formed in the vibration absorbing portion, Can obtain desired vibration damping characteristics.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment in which the anti-vibration support device according to the present invention is used in a CD player as a recording / reproducing device will be described below with reference to FIGS. The same reference numerals in the drawings denote the same or corresponding parts.

First, an outline of a CD player will be described with reference to FIGS. In the CD player, as shown in FIG. 1, a cover 1 that can be opened and closed is provided on a casing 1, and a disc D is accommodated in a space formed between the upper surface of the casing 1 and the cover 2. A notch 3 is formed in a part of the upper surface of the casing 1, and a frame 4 on which a mechanical deck MD including a motor 5 for rotating and driving the disk D and an optical pickup 6 is mounted as shown in FIG.
3 and is supported so as to form the same surface as the upper surface of the casing 1. The optical pickup 6 has a long hole provided in the frame 4 for reading the signal of the disc D.
Move along 8. The disk D is held on a disk table 9 connected to the rotating shaft of the motor 5,
It is rotated by the drive of 5.

As shown in FIG. 2, holes 12 are provided in the vicinity of the motor 5 and in the corners of the bending step 11 formed on the outer peripheral edge of the frame 4 (see FIG. 3). And projections 13 and 14 are provided so as to face each other as engagement members at positions corresponding to the holes 12 on the lower inner side.
5 is engaged with the projections 13 and 14 and also with the hole 12 to support the frame 4 on which the mechanical deck MD is mounted.

Next, the anti-vibration support device 15 of the present invention will be described with reference to FIG. In this embodiment, the anti-vibration support device 15 includes a cylindrical casing engaging body 20, a cylindrical frame engaging body 21 having a predetermined space around the casing engaging body, and an outer wall of the casing engaging body 20. And a film-shaped vibration absorbing portion 22 continuous between the inner wall of the frame engaging member 21 and integrated with an elastic body such as butyl rubber or silicon rubber whose rubber hardness is adjusted to 10 to 25, for example. It is formed into a.

A casing engaging body 20 formed in a cylindrical shape
Has a height in contact with the upper and lower inner surfaces of the casing 1, and has projections 1 protruding from upper and lower ends thereof so as to face the casing 1.
Engaging portions 25 and 26 that engage with 3, 14 are provided. The cylindrical frame engaging body 21 has a gap G between its lower end and the lower part of the casing 1 and a gap H between its upper end and the upper part of the casing 1.
Has an interval F between its outer wall and an annular groove 28 on its outer periphery.
Are formed, and the annular groove 28 is engaged with the hole 12 provided in the frame 4. The vibration absorbing portion 22 is formed in a film shape extending in the horizontal direction so as to be orthogonal to both side walls over the entire circumference between the outer wall of the casing engaging body 20 and the inner wall of the frame engaging body 21. I have.

The distance F between the outer wall of the casing engaging member 20 and the inner wall of the frame engaging member 21 shown in FIG.
The distance f between the outer peripheral edge of the disk D held by the disk table 9 and the side wall of the disk accommodating space C, the notch formed on the upper surface of the casing 1 and the casing 1 exposed from the notch and It is set smaller than the distance f 'from the frame 4 forming the same surface. The distance G between the lower end of the frame engaging body 21 and the lower part of the casing 1 and the distance H between the upper end of the frame engaging body 21 and the upper part of the casing 1 are determined by the distance between the lower surface of the disk D held by the disk table 9 and the casing 1. And the distance h between the upper surface of the disk D and the cover 2 are set to be smaller than each other, so that the disk D does not interfere with the periphery of the storage space C due to the vibration of the mechanical deck MD.

The anti-vibration support device 15 of the present invention is required to have a damping characteristic against vibration depending on the place where the frame 4 is mounted. The damping characteristic depends on the hardness of the elastic body constituting the anti-vibration support device and the vibration absorbing portion. Can be variously changed depending on the thickness of the casing engaging body and the distance between the casing engaging body and the frame engaging body. Hereinafter, another embodiment for obtaining a desired attenuation characteristic will be described with reference to the drawings.

The anti-vibration support device 15 shown in a sectional view in FIG.
This is an embodiment in which the casing engaging body 20 is cylindrical. The casing engaging body 20 is formed in a cylindrical shape by communicating the engaging portion 25 with the engaging portion 26, and thus, the casing engaging body 20 is orthogonal to the diameter of the cylindrical casing engaging body when the outer diameter is the same. The elasticity in the direction (lateral direction in FIG. 4) can be increased. Therefore, the anti-vibration support device 15 in this embodiment can attenuate the lateral vibration of the frame 4 not only by the vibration absorbing portion 22 but also by the elasticity of the casing engaging body 20.

Further, the anti-vibration support device 15 shown in a sectional view in FIG.
4 a cylindrical inner portion having engaging portions 25 and 26 to be engaged with
This is an embodiment in which the outer structure 20a and the outer portion 20b located outside the outer structure 20a have a double structure made of elastic bodies having different hardnesses. The outer portion 20a is formed integrally with the frame engaging member 21 and the vibration absorbing portion 22. In this case, the casing engaging body is formed in a double structure having different hardnesses on the inside and outside in the cross section, for example, by using a harder rubber for the inner portion 20a than the outer portion 20b, so that the direction orthogonal to the diameter is obtained. The rigidity of the anti-vibration support device 15 can be changed in the same manner as in the embodiment shown in FIG.

Next, in order to obtain a desired attenuation characteristic, FIG.
To other vibration-damping support devices based on FIGS.
Fifteenth embodiments will be described. The anti-vibration support device 15 shown in a sectional view in FIG. 6 is inclined with respect to both wall surfaces so that the vibration absorbing portion 22 has a depression angle from the outer wall of the casing engaging member 20 to the inner wall of the frame engaging member 21. Fig. 3
The configuration is different from that shown in FIG. In addition, without being limited to this embodiment, the vibration absorbing portion 22 may be formed so as to be inclined from the outer wall of the casing engaging body 20 to the inner wall of the frame engaging body 21 so as to be at an elevation angle.

FIG. 7 shows a plurality of through holes 30 formed in the vibration absorbing section 22 at appropriate intervals. FIG.
FIG. 7 is a partially enlarged view showing an embodiment in which a plurality of notches 31 are provided to change the damping characteristics of the vibration isolating support device 15 against vibration. The embodiment of the vibration isolating support device 15 shown in FIGS. 7 and 8 has a vibration absorbing portion 22 integrally formed between the outer wall of the casing engaging body 20 and the inner wall of the frame engaging body 21. This is different from the above-described configuration in which the vibration absorbing section 22 is integrally formed in a ring shape over the entire circumference.

Further, in the vibration isolating support device 15 of the present invention, the vibration absorbing portion 22 formed between the outer wall of the casing engaging member 20 and the inner wall of the frame engaging member 21 is limited to the above-described embodiment. Instead, the formed position may be, for example, the upper end or the lower end of the frame engaging body 21. For example, as shown in the sectional view of FIG. By forming the vibration absorbing portion 22 at a position, the damping characteristic thereof can be changed.

Further, in the anti-vibration support device 15 of the present invention, the vibration absorbing portion 22 is provided as shown in a sectional view of FIG.
A thin film is formed over the entire circumference between the outer wall of the casing engaging body 20 and the inner wall of the frame engaging body 21, and a rib 32 is formed on one or both of the upper surface and the lower surface of the thin film. Can also. In the case of this embodiment,
As shown in FIG. 11, three ribs 32 are formed on the upper surface and the lower surface of the vibration absorbing portion 22 at equal radial intervals, respectively, so that the positions provided on the upper surface and the lower surface are not aligned.

The operation of the embodiment of the anti-vibration support device 15 of the present invention shown in FIG. 3 will be described with reference to FIGS. The anti-vibration support device 15 of the CD player in the normally placed state is provided with the projections 1 protruding from each other in the casing 1.
The casing engaging body 20 having the engaging portions 25 and 26 engaged with the engaging portions 3 and 14, respectively, has the annular groove 30 engaged with the hole 12 of the frame 4 on which the mechanical deck MD is mounted via the vibration absorbing portion 22. The frame engagement body 21 is supported. As shown in FIG. 12, when the frame 4 on which the mechanical deck MD is mounted moves laterally due to the vibration of the CD player, the vibration absorbing portion
Vibration is absorbed and attenuated by elastically deforming 22 such that it expands on one side and is compressed on the other. When the lateral vibration received by the CD player is large, the inner circumference of the frame
By contacting the outer periphery of the frame 20, the movement of the frame 4 beyond a predetermined level is restricted, and the interference between the frame 4 and the notch 3 and the interference between the outer peripheral edge of the disk D and the side wall of the disk accommodation space C are avoided. Further, as shown in FIG. 13, when the frame 4 on which the mechanical deck MD is mounted moves vertically,
Vibration is absorbed and attenuated by the elastic deformation of the vibration absorbing portion 22 so as to extend as a whole. When the vertical vibration received by the CD player is large, the frame
The upper end surface and the lower end surface of the abutment 21 contact the casing 1 to restrict the movement of the frame 4 by a predetermined amount or more, thereby avoiding interference between the lower surface of the disk D and the upper surface of the casing 1 and between the upper surface of the disk D and the lid 2.

The above-described anti-vibration support device 15 is formed by flowing an elastic material into a well-known injection mold. The mold for molding the anti-vibration support device 15 of the present invention includes a vibration absorbing portion 22.
By providing a mold mating surface having a gap in the portion corresponding to the above, the gap can be filled with an elastic material to form a vibration absorbing portion, so that manufacturing is easy and burrs are generated on the vibration absorbing portion. It is possible to form a vibration-isolation supporting device having good dimensional accuracy without causing the vibration-damping support device.

[0032]

Since the present invention is configured as described above, it has the following effects.

The vibration-damping support device of the present invention comprises a cylindrical or columnar casing engaging body, a cylindrical frame engaging body having a predetermined space between the casing engaging body and an outer wall, and an outer casing engaging body. Since the continuous vibration absorbing portion between the wall and the inner side wall of the frame engaging body is formed of an elastic body, the mechanical deck is supported at a predetermined position while protecting the mechanical deck from the influence of the attached frame vibration or inclination. And the vibration damping ability can be enhanced.

The vibration absorbing portion of the vibration isolating support device of the present invention is elastically deformed so as to expand or compress when subjected to vibration and does not come into contact with the surroundings, so that the damping ability is not impaired.

When the vibration absorbing portion of the vibration isolating support device of the present invention is subjected to a vibration exceeding a predetermined level, the inner periphery of the frame engaging member comes into contact with the outer periphery of the casing engaging member and the casing. Can be regulated.

The anti-vibration support device of the present invention can obtain desired vibration damping characteristics with high precision and can be easily formed.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a CD player using an anti-vibration support device of the present invention.

FIG. 2 is a sectional view of the CD player shown in FIG.

FIG. 3 is a cross-sectional view showing one embodiment of a vibration isolation support device according to the present invention.

FIG. 4 is a cross-sectional view showing a modification of the casing engaging body.

FIG. 5 is a sectional view showing another modified example of the casing engaging body.

FIG. 6 is a cross-sectional view showing a modification of the vibration absorber.

FIG. 7 is an enlarged sectional view showing another modification of the vibration absorbing section.

FIG. 8 is an enlarged sectional view showing another modified example of the vibration absorbing section.

FIG. 9 is a cross-sectional view showing another modified example of the vibration absorber.

FIG. 10 is a sectional view showing another modification of the vibration absorbing section.

FIG. 11 is a plan view of FIG. 10;

FIG. 12 is an explanatory diagram showing a state of the vibration isolating support device when the frame moves rightward due to vibration.

FIG. 13 is an explanatory diagram showing a state of the vibration isolating support device when the frame moves downward by vibration.

FIG. 14 is a sectional view showing a conventional example.

FIG. 15 is a sectional view showing a conventional example.

FIG. 16 is a sectional view showing a conventional example.

[Explanation of symbols]

 1 Casing 4 Frame 13, 14 Projection 15 Anti-vibration support device 20 Casing engaging body 21 Frame engaging body 22 Vibration absorbing part 25, 26 Engaging part 28 Annular groove 30 Through hole 31 Notch 32 Rib

Claims (6)

(57) [Claims] 1. A cylindrical or columnar casing engaging body engaged with an engaging member protruding from the casing and opposed to the casing, and the casing engaging body engaged with a frame on which a recording / reproducing device is mounted. A cylindrical frame engaging body having a predetermined interval between the outer wall of the united body and a vibration absorbing portion continuous between the outer wall of the casing engaging body and the inner wall of the frame engaging body are formed of an elastic body. An anti-vibration support device, characterized in that: 2. The anti-vibration support device according to claim 1, wherein the casing engagement body is formed in a double structure by elastic bodies having different hardnesses on the inside and the outside. 3. The vibration absorber according to claim 1, wherein the vibration absorbing portion is formed in a film shape extending perpendicular to an outer wall of the casing engaging body and an inner wall of the frame engaging body. 6. The vibration isolating support device according to item 5. 4. The vibration absorbing portion is formed in a film extending so as to be inclined with respect to an outer wall of a casing engaging body and an inner wall of a frame engaging body. 6. The vibration isolating support device according to item 5. 5. The vibration isolating support device according to claim 1, wherein a through hole or a notch is provided in the vibration absorbing portion. 6. The anti-vibration support device according to claim 1, wherein a rib is provided on one or both surfaces of the vibration absorbing portion.