JPH03290892A - Vibration proof mechanism for disk reproducing device - Google Patents

Abstract

PURPOSE:To improve impact resistance by providing a second plane-shaped member with a low friction coefficient, third vibration proof member and second contact member, which is provided on the other side surface of an outer frame part, to almost get point-contact with the second plane-member. CONSTITUTION:Semispherical objects 29 to 30 formed by iron, for example, are respectively fitted to insides 23c and 23d on the both side surfaces of an outer frame part 23. On the other hand, the both side surfaces of a disk reproducing mechanism part 26 respectively get contact through vibration proof parts 31 and 32 to the semispherical objects 29 and 30. Plates 34 and 34 made of synthetic resin are provided with the small friction coefficient of the surface. Therefore, since any impact can be absorbed by the operations of the respective vibration proof members 32 and 31 even when applying big impact, the disk reproducing mechanism part 26 can be protected. Thus, the extremely satisfactory vibration proof mechanism of a disk reproducing device mechanically immune to the impact can be obtained.

Description

DETAILED DESCRIPTION OF THE INVENTION [Purpose of the Invention (Industrial Application Field) The present invention relates to a disc playback device such as a compact disc player, and particularly to a method for preventing the disc playback mechanism from being housed in a cabinet. Concerning improvement of vibration mechanism.

(Prior Art) As is well known, in the field of audio equipment, analog information signals such as audio signals are converted into digital data using PCM (pulse code modulation) technology and recorded on recording media such as disks and tapes. Digital recording and reproducing systems that record and reproduce the recorded information are becoming widespread.

And for those that use disks as recording media,
Currently, optical compact disc players are the mainstream.

Furthermore, recently, attention has been paid to the enormous recording capacity of compact discs, and compact discs are used as read-only memory for arithmetic processing control systems using electronic computers and the like. 2. Description of the Related Art So-called CD-ROMs have been actively developed and put into practical use, and playback devices for playing back CD-ROMs with higher performance and reliability are also emerging.

By the way, some playback devices that play this type of compact disc require the disc to be housed in a case in order to prevent dirt and dust from adhering to the disc and to obtain an accurate playback signal. There are some that are equipped with this case and can be used to play discs.

FIG. 10 shows such a disc playback device. That is, reference numeral 11 in the figure indicates a disk cartridge in which a disk 12 is housed in a case 13. and,
This case 13 has a disk table insertion opening 13a and a tracing hole 13b formed therein.

On the other hand, reference numeral 14 in FIG. 10 is a cabinet configured in a substantially box shape, and a disk insertion slot 14a is formed in the front surface of the cabinet. This cabinet 14 accommodates a disk reproducing mechanism section 16 having a disk loading section 15 in which a disk insertion port 15a corresponding to the disk insertion port 14a is formed.

Here, the disk loading section 15 of the disk playback mechanism section 16 has a disk table 17 which is mounted with the disk 12 of the disk cartridge 11 and driven to rotate, and a disk table 17 which is mounted on the disk table 17 and which is rotated in the radial direction. An optical pickup 18 moves and reads data by applying a laser beam irradiated from the pickup section 18a to the disk 12 through a tracing hole 13b formed in the case 13 of the disk cartridge 11. is provided.

According to the disc playback device having such a configuration, the disc cartridge 11 is inserted through the disc insertion slot 14a of the cabinet 14 and mounted on the disc mounting section 15 of the disc playback mechanism section 16, so that the disc 12 is placed on the disc table 17. The pickup 18 reads data, and the disc 12 is reproduced.

By the way, in the above-mentioned disc playback device, a focus servo is applied so that the laser beam irradiated from the pickup N518a is always focused on the signal recording surface of the disc 12, and a focus servo is applied to the pit row of the disc 12. Although tracking servos are used to follow the target, these servos are susceptible to external vibrations and shocks, and are prone to focus and tracking errors.

Therefore, conventionally, as shown in FIG. 11, the disc reproducing mechanism section 16 is housed in the cabinet 14 via a vibration isolating mechanism 19. This vibration isolation mechanism 19
are a plurality of springs 20, 20, which suspend and support the disc playback mechanism section 16 within the cabinet 14.・・・・・・
and a viscous damping member 21, which absorbs external vibrations and prevents them from being transmitted to the disc playback mechanism section 16.

However, in a disc playback device with anti-vibration measures as described above, as shown in FIG.
4 is used vertically, the supporting and vibration-proofing effects of the springs 20, 20°, etc., constituting the vibration-isolating mechanism 19 on the disc playback mechanism section 16 will change significantly. A problem arises in that it is no longer possible to provide a good anti-vibration effect to the disc playback mechanism section 16.

Furthermore, since the disc playback mechanism section 16 moves downward in FIG.
The disk cartridge 11 has deviated significantly from the position a.
This also causes the inconvenience of not being able to take things in or out. Furthermore, in FIG. 12, if a large impact is applied in the direction perpendicular to the floor surface, that is, in the direction of arrows Problems such as collision and damage may also occur.

(Problems to be Solved by the Invention) As described above, with the conventional vibration isolation means used in disc playback devices, even if the configuration is such that a good vibration isolation effect can be obtained in a certain specific posture, the posture If it changes, there is a problem in that it becomes impossible to obtain any vibration damping effect.

Therefore, this invention was made in consideration of the above circumstances, and has a simple structure that can reliably support the disc playback mechanism even if the cabinet position is changed, exhibiting a vibration-proofing effect, and is able to withstand shocks. It is an object of the present invention to provide an extremely good vibration isolation mechanism for a disc playback device that is mechanically strong even under the conditions of vibration.

[Structure of the Invention (Means for Solving the Problems) The vibration isolation mechanism for a disc playback device according to the present invention includes a disc playback mechanism section that is configured in a substantially box shape and has an insertion slot on the front surface into which a disc can be inserted and removed. The object of the present invention is to accommodate a disk in an outer frame via vibration isolating means so that the insertion opening corresponds to a disk insertion opening formed on the front surface of a substantially box-shaped outer frame.

A first vibration isolating member is interposed between the bottom surface of the disc playback mechanism section and the bottom surface of the outer frame section and elastically connects the disk playback mechanism section and the outer frame section; A second vibration isolating member attached to the side surface of the disc playback mechanism section facing the side surface, and a vibration damping member with a low coefficient of friction provided on either the second vibration isolating member or one side surface of the outer frame section. A first flat member, a second vibration isolating member, and a first plate provided on the other side of one side of the outer frame and in approximately point contact with the first flat member.
a contact member, a third vibration isolating member attached to the side surface of the disc playback mechanism section opposite to the other side surface of the outer frame section, and a third vibration isolating member and the other side surface of the outer frame section. a second flat member with a low coefficient of friction provided on either one;
provided on the other side of the vibration isolating member and the other side of the outer frame portion,
A second contact member is brought into approximately point contact with the second flat member.

(Function) According to the above configuration, even if the attitude of the outer frame changes, the second or third vibration isolating member prevents the weight of the disk playback mechanism from being received, and the insertion opening of the disk playback mechanism is prevented from being absorbed. can be made to correspond to the disk insertion slot of the outer frame part'. Further, since the first and second flat members and the first and second contact members are brought into approximately point contact, almost no external vibration applied to the outer frame is transmitted to the disc playback mechanism. A good vibration isolation effect can be obtained even when the attitude of the outer frame is changed. Furthermore, the disc playback mechanism section includes a second
Since it is supported from both sides by the third vibration isolating member, it is safely protected against large impacts applied from the outside, and as a result, the reliability of the device during transportation can be improved.

(Example) Hereinafter, an example of the present invention will be described in detail with reference to the drawings. In FIG. 1, reference numeral 22 denotes a cabinet formed in a substantially box shape, and an outer frame portion 23 is provided along the inner surface of the cabinet. A disk insertion opening 23a is formed on the front surface of the outer frame 23 including the cabinet 22, into which a disk cartridge 24 can be inserted and removed.

The outer frame portion 23 also has a disk insertion slot 23a.
It has a disk loading section 25 in which a disk insertion slot 25g corresponding to the disk insertion slot 25g is formed, and a disk playback mechanism section 26 for reading data from a disk (not shown) provided in the disk cartridge 24 is housed therein.

Here, between the bottom surface 26a of the disc playback mechanism section 26 and the bottom surface 23b of the outer frame section 23, a plurality of (in the illustrated case, two Two vibration isolating members 27 and 27 are interposed. Therefore, when the outer frame section 23 is installed with its bottom surface 23b facing the floor surface 28, the disk playback mechanism section 26 is placed on the vibration isolating member 27, 27, and the disk insertion slot 25a into the disk insertion slot 23a of the outer frame 23.
It is accommodated in the outer frame portion 23, facing the .

Furthermore, hemispherical bodies 29 and 30 made of, for example, iron are attached to the inner sides 23c and 23d of both sides of the outer frame portion 23, respectively. Flat plates 33.34 made of synthetic resin and having a small surface friction coefficient are provided on both sides of the disk playback mechanism section 26 and are in contact with the hemisphere 29.30 through vibration isolation members 31.32, respectively. It is being As shown in FIG. 1, when the outer frame section 23 is installed with its -side surface 23c facing the floor surface 28, the disk playback mechanism section 26 is placed on the hemisphere 29. , the disc insertion slot 25a is connected to the disc insertion slot 2 of the outer frame 23.
3a, and is accommodated in the outer frame portion 23. Here, as shown in FIG. 2, the vibration isolating members 31 and 32 are formed into a substantially cylindrical shape, and one end thereof is fitted into the frame 26b for mounting the disc playback mechanism section 26 to support it. has been done.

According to the configuration of the above embodiment, when the outer frame portion 23 is in the posture shown in FIG. 1, external vibration parallel to the floor surface 28
Mainly due to the sliding action between the two hemispheres and the flat plate 33, it becomes difficult for the light to be transmitted to the disc playback mechanism section 26. Also, external vibration perpendicular to the floor surface 28 is caused by each vibration isolating member 27, 31.3.
2, and a good vibration damping effect can be obtained. Furthermore, even if a large impact force is applied to the outer frame portion 23 in the direction of the arrow A or B in the figure, the vibration isolating members 32 and 31
Since the impact can be absorbed by the function of the disc reproducing mechanism section 26, the reliability of the device during transportation can be improved.

Further, as shown in FIG. 3, even when the outer frame section 23 is installed with its negative side surface 23d facing the floor surface 28, the disk playback mechanism section 26 is not placed on the hemisphere 30. In this case, the disc insertion slot 25a is placed opposite the disc insertion slot 23a of the outer frame 23, and the disc is accommodated in the outer frame 23, and the same effect as described above can of course be obtained. .

Next, FIG. 4 shows a second embodiment of the present invention. That is, if the same parts as in FIG. 1 are shown with the same symbols, in place of the vibration isolating members 32 and 33 shown in FIG. Swing member 32
a, 33a is used. In this case, if the outer frame part 23 is installed with one side 23c facing the floor 28,
A gap p is created between the hemisphere 30 and the flat plate 34. As a result, external vibrations perpendicular to the floor surface 28 are absorbed by the vibration isolating member 27.
Although the vibration is absorbed only by the vibration isolating member 31a, the disc playback mechanism section 26 is softly supported by the vibration isolating member 27.31a, so the vibration resistance is greatly improved, although the shock resistance is slightly inferior. .

In other words, the vibration absorption property is improved over a wider band. Further, as shown in FIG. 5, one side 2 of the outer frame portion 23
Even if the 3d is installed in a position facing the floor 28,
A gap ρ is created between the hemisphere 29 and the flat plate 33, and it goes without saying that the same effect as described above can be obtained.

Furthermore, FIG. 6 shows a third embodiment of the invention. That is, a screw 35 is attached to one side 23C of the outer frame 23.
The vibration isolating member 31 having the flat plate 33 is supported through the flat plate 33 of the disc playback mechanism section 26.
A hemispherical protrusion 2 that is in contact with the flat plate 33 on the opposing surface 26c.
6d, and by adjusting the screw 35, the height of the disc playback mechanism section 26 can be adjusted, and the height of the disc insertion slot 2 can be adjusted.
5a can be adjusted so as to face the disk insertion slot 23a of the outer frame portion 23.

In addition, in the configuration shown in FIG. 7, the hemispherical protrusion 26d is replaced by the disk reproducing mechanism section 26d.
A small ball 36 made of, for example, iron is supported on the surface 26c facing the flat plate 33 of No. 6 so as to be rotatable in any direction with a part thereof exposed, and this small ball 36 is brought into contact with the flat plate 33. This is how it was done. According to such a configuration,
Since the small ball 36 rolls into contact with the flat plate 33, the rotational movement of the small ball 36 makes it more difficult for some of the external vibrations parallel to the floor surface 28 to be transmitted to the disc playback mechanism section 26, resulting in a high vibration-proofing effect. can be obtained.

Further, in the configuration shown in FIG. 8, the tip of the vibration isolating member 31 attached to the screw 35 has a
Instead of the flat plate 33, a small ball 36 is supported rotatably in any direction with a part of it exposed, and the flat plate 33 that comes into contact with the small ball 36 is attached to the disk playback mechanism 26 side. This is what I did.

Furthermore, in the one shown in FIG. 9, a friction member 37 having a hemispherical protrusion 37g formed in the center is supported at the tip of a vibration isolating member 31 attached to a screw 35.
By bringing the protrusion 37a into direct contact with the disk reproducing mechanism section 26, the flat plate 33 is eliminated and costs can be reduced.

Here, in the explanations from FIG. 6 to FIG. 9, the configuration on the one side 23c side of the outer frame portion 23 has been described, but the configuration on the other side 2Bd side of the outer frame portion 23 is also described in FIG. ~
It goes without saying that the configurations up to FIG. 9 can be applied.

It should be noted that the present invention is not limited to the above-described embodiments, and can be implemented with various modifications without departing from the gist thereof.

[Effects of the Invention] As detailed above, according to the present invention, even if the posture of the cabinet is changed with a simple configuration, the disk playback mechanism can be reliably supported and the vibration-proofing effect can be exhibited, and it can withstand shocks. Therefore, it is possible to provide an extremely good vibration isolation mechanism for a disc playback device that is mechanically strong even when used against the user.

[Brief explanation of drawings]

FIG. 1 is a side sectional view showing an embodiment of the vibration isolation mechanism for a disc playback device according to the present invention, FIG. FIG. 4 is a side sectional view showing the second embodiment of the present invention, and FIG. 5 is a side sectional view showing the same embodiment in a different installation state. FIG. 6 is a side sectional view showing the third embodiment of the present invention, and FIGS. 7 to 9 are side sectional views showing partially modified versions of the third embodiment. ,
Fig. 10 is a perspective view showing the overall configuration of a disc playback device, Fig. 11 is a front view showing a vibration isolation mechanism of a conventional disc playback device, and Fig. 12 explains problems with the conventional vibration isolation mechanism. FIG. DESCRIPTION OF SYMBOLS 11... Disk cartridge, 12... Disk, 13... Case, 14... Cabinet, 15...
... Disc loading section, 16... Disc playback mechanism section,
17...Disc table, 18...Pickup, 19...Vibration isolation mechanism, 2o...Spring, 21...
...Viscous damping member, 22...Cabinet, 23...
・Outer frame part, 24...Disk cartridge, 25...
・Disc mounting section, 26... Disc playback mechanism section, 2
7... Vibration isolation member, 28... Floor surface, 29.30...
Hemisphere, 31°32... Vibration isolation member, 33.34...
Flat plate, 35... Screw, 36... Small ball, 37... Friction member.

Claims (3)

[Claims] (1) A disc playback mechanism section that is approximately box-shaped and has an insertion slot on the front surface through which a disc can be loaded and unloaded is configured so that the insertion slot corresponds to the disc insertion slot formed on the front surface of the approximately box-shaped outer frame part. In the vibration isolating mechanism of a disc playback device housed in the outer frame via a vibration isolator, the disc playback mechanism is interposed between a bottom surface of the disc playback mechanism and a bottom surface of the outer frame. and a second vibration isolating member attached to a side surface of the disc playback mechanism section opposite to one side surface of the outer frame section. and a first vibration damping member having a low coefficient of friction provided on either one of the second vibration isolating member and one side surface of the outer frame portion.
a first contact member provided on the other side of one side of the second vibration isolating member and the outer frame portion and in approximately point contact with the first flat member; and the outer frame. a third vibration isolating member attached to a side surface of the disk playback mechanism section opposite to the other side surface of the outer frame section; a second flat member having a low coefficient of friction; and a second flat member provided on the other side of the third vibration isolating member and the other side of the outer frame and in approximately point contact with the second flat member. A vibration isolation mechanism for a disc playback device, comprising: a contact member. (2) In a state where either one of the first flat member and the first contact member and the second flat member and the second contact member are in contact, the other flat member 2. The vibration isolating mechanism for a disc playback device according to claim 1, wherein the lengths of the second and third vibration isolating members are set so that the contact member and the second vibration isolating member are spaced apart from each other by a predetermined distance. (3) The second and third vibration isolating members are attached to screws screwed into one side and the other side of the outer frame portion, respectively, and their positions are adjusted. or 2
Anti-vibration mechanism of the disc playback device described.