JP2003247582A - Vibration-resistant apparatus of disk regeneration machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent a rubber portion of an oil damper from deteriorating. <P>SOLUTION: A ventilation passage 9c, which discharges air within a cylindrical portion 28 with a bottom when a vibration-resistant shaft 9 is inserted in a cylindrical portion 25 with a bottom, is formed on one of the cylindrical portion 25 with the bottom of a rubbery vessel 8 composing the oil damper 7 or the vibration-resistant shaft 9. When fitting between the vibration-resistant shaft 9 and the cylindrical portion 25 with the bottom is moved in long intervals so that a regenerated board 4 gets on and off a disk against a case 1, the vibration-resistant shaft 9 can be slipped out from the cylindrical portion 25 with the bottom. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an anti-vibration device for a disc player in which a playback substrate on which a pickup and a turntable are mounted is connected to a housing by a spring and an oil damper.

[0002]

2. Description of the Related Art In a vehicle-mounted disc reproducing apparatus, a casing and a reproducing substrate are connected by a spring so that vibration from a vehicle applied to the casing is not transmitted to a reproducing substrate having a pickup. . This spring hangs the reproduction substrate at a neutral position away from the inner wall of the housing so that vibration from the housing is not absorbed by the spring and is transmitted to the reproduction substrate. on the other hand,
This spring may cause the regenerated substrate to freely vibrate. Therefore, an oil damper that damps and damps this free vibration is attached between the reproduction substrate and the housing. This oil damper is filled with highly viscous oil inside, and a rubber container provided with a bottomed cylindrical portion having an opening on the surface,
It is composed of a vibration-proof shaft fitted in this bottomed tubular portion.
Then, a rubber container is provided on one of the housing and the recycled substrate,
A vibration isolation shaft is attached to the other. The anti-vibration shaft is an elongated cylinder made of metal and is sized to fit the bottom end of the bottomed tubular portion by expanding the inner diameter of the bottomed tubular portion from the opening. When the anti-vibration shaft is fitted into the bottomed tubular part, they are completely integrated, and when the playback substrate moves with respect to the housing, the anti-vibration shaft brakes with the bottomed tubular part due to the viscosity of the oil. Move inside the rubber container while receiving.

[0003]

In the in-vehicle disc reproducing apparatus, the reproducing substrate is fixed to the neutral position of the housing to prevent the rubber portion of the rubber container from being deformed when the disc is not mounted. In this case, the disk insertion port is located near the center of the cabinet, which limits the design of the display formed on the cabinet. Therefore, if the reproduction substrate is fixed so as to be pressed against the ceiling of the housing, the disc insertion opening can be provided in the upper part of the front surface of the cabinet, and a large space for the display can be secured.

However, when the rubber container is installed on the bottom surface of the housing, the rubber substrate moves the reproduction substrate to the ceiling of the housing. Put the container in the stretched state. If the rubber portion is left in such a stretched state, the stretched rubber portion will deteriorate. In addition, the rubber that is stretched and thinned is the same phenomenon that air escapes from the balloon,
Air gets inside the rubber container through the rubber curtain. If this happens, the braking characteristics of the oil damper will change, making it difficult to suppress free vibration. SUMMARY OF THE INVENTION It is an object of the present invention to provide a vibration isolator for a disc player which prevents deterioration of the rubber part of the oil damper and prevents air from entering inside.

[0005]

An anti-vibration device for a disk player is composed of a spring and an oil damper that connect a playing board equipped with a playing unit with a housing, and the playing board is moved into the housing. This oil damper is held freely and comprises a rubber container having a bottomed tubular portion having an opening on the surface filled with oil, and a shaft fitted to the bottomed tubular portion. It consists of. Then, one of the rubber container and the shaft is attached to the reproduction substrate, and the other is attached to the housing. The first invention provides an air passage for ventilating between the inner bottom portion of the bottomed tubular portion and the opening on at least one of the inner peripheral surface and the shaft of the bottomed tubular portion, and the reproduction substrate is a casing. When it is held movably in the body, it is integrated with the bottomed cylindrical portion and the shaft, and when the regenerated substrate is pressed against the ceiling of the housing and the regenerated substrate is kept in a state where migration is prohibited, the ventilation passage is exposed to the outside air. It was made to flow so that the shaft could move outward from the bottomed tubular part.
By making the shaft movable outward from the bottomed tubular portion in this way, the rubber container is not deformed and deterioration of the rubber portion is prevented.

By applying grease to the outer peripheral surface of the shaft of the oil damper, the shaft can smoothly move outward from the bottomed cylindrical portion. It is assumed that this grease has a higher viscosity than the oil filled in the rubber container of the oil damper, and when the recycled substrate is movably held in the housing, the bottomed cylindrical portion and the shaft have the same viscosity as the grease. It can move as a unit. Further, if the shaft of the oil damper is made of synthetic resin, the ventilation passage can be easily formed on the outer peripheral surface of the shaft.

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION A vibration isolation device for a disk player according to the present invention will be described with reference to FIGS. In a vehicle-mounted disc player, as shown in FIG. 1, a turntable 2, a clamper 3, and a playback substrate 4 including a playback unit such as a pickup (not shown) are arranged inside a housing 1 drawn in phantom lines. . The reproduction substrate 4 is connected to the housing 1 by springs 5 attached to the four corners, and is movably supported at a neutral position where the outer shape of the reproduction substrate 4 is separated from the inner wall of the housing 1 by a predetermined distance. On the other hand, the case
A rubber container 8 of an oil damper 7 is arranged on the bottom surface 1a of 1 at the disk insertion port 6 side and the back side. In addition, recycled board 4
The vibration isolation shaft 9 of the oil damper 7 is attached to the bottom surface 1a of the housing 1. Then, the upper part of the housing 1 is largely released, and the reproduction substrate 4 is mounted inside the housing 1 from this released portion. When the reproduction substrate 4 is mounted from above the housing 1, the vibration-proof shaft 9 provided on the reproduction substrate 4 can be engaged with the rubber container 8. Then, after the reproduction substrate 4 is arranged inside the housing 1, the upper part of the housing 1 is covered with the cover 10. This cover 1
The inner surface of 0 is the ceiling 1b of the housing 1.

On the reproduction substrate 4, a centering mechanism 11 for aligning the disc inserted in the insertion port 6 with the upper surface of the turntable 2 and a disc sandwiched between the guide plate 12 and the feed roller 13 and the feed roller 13 is rotated. A disc transport mechanism 14 for transporting the disc between the turntable 2 and the insertion slot 6,
Disc clamp mechanism that presses the disc transported on the turntable 2 to the turntable 2 with the clamper 3.
15, a lock mechanism 16 for fixing the reproduction substrate 4 to the housing 1 when the disc is not mounted in the reproduction section is provided. The lock mechanism 16 includes a support plate 17 that rotatably supports the feed roller 13 at one end side, and a cam 19 that engages a pin 18 formed at the other end of the support plate 17 to rotate the support plate 17. A control plate 20 formed with, a motor (not shown) for driving the control plate 20, a tongue piece 1c having a square hole 21 and provided on the side surface of the housing,
It is composed of a triangular protrusion 17a formed on the other end side of the support plate 17 that engages with the square hole 1c, and a ceiling 1b of the housing 1 and both side end portions 4a of the reproduction substrate 4.

FIG. 2 shows a rubber container 8 and an antivibration shaft 9 of the oil damper 7. The antivibration shaft 9 has a flange 9a for attaching the antivibration shaft 9 to the reproduction substrate 4 and an antivibration end. Tapered surface 9b for facilitating insertion of swing shaft 9 into rubber container 8 and two concave grooves carved from the base to the tip of flange 9a
9c and are formed. The groove 9c serves as a ventilation path for allowing air remaining in the bottomed tubular portion to escape when the vibration-proof shaft 9 is inserted into the bottomed tubular portion. And this vibration-proof shaft 9 has a concave groove 9c.
Is formed by molding a synthetic resin in order to easily form.

The rubber container 8 is made of a synthetic resin and has a cylindrical body 8a, a synthetic resin bottom plate 8b for covering the lower surface of the body 8a, and a thin rubber body for covering the upper surface of the body 8a. Lid 8c
And an oil 8d sealed in the body 8a. The bottom plate 8b is provided with a flange for attaching a rubber container protruding outside the body portion 8a.
8e is formed. The collar 8e enters between the pressing piece 1d formed by cutting and bending from the bottom surface 1a of the housing 1 and the bottom surface 1a, and locks the rubber container 8 on the bottom surface 1a. On the other hand, in the lid 8c, a bottomed cylindrical portion 25 having an opening 8g for fitting the vibration isolation shaft 9 is projected at the center of the bellows 8f that draws a concentric circle, with its tip protruding toward the inside of the rubber container 8. Is formed.

The bottomed tubular portion 25 has a tapered surface 26 at the entrance.
And a first cylindrical portion 27 having an inner diameter slightly smaller than the diameter of the vibration-proof shaft 9 in a portion close to the entrance, and slightly larger than the diameter of the vibration-proof shaft 9 in the bottom portion of the bottomed tubular portion 20. A second cylindrical portion 29 having an inner diameter is formed. First cylindrical part
27 is fitted to a part of the vibration-proof shaft 9. On the other hand, the outer diameter of the bottomed tubular portion 25 is sufficiently smaller than the inner diameter of the body portion 8a, and the tip of the bottomed tubular portion 25 is set at a position sufficiently separated from the bottom plate 8b. The oil 8d enclosed in the body portion 8a is used that has a small change in viscosity due to a change in temperature, and the viscosity of the oil 8d brakes the bottomed tubular portion 25 from moving around in the body portion 8a. Further, the outer periphery of the vibration-proof shaft 9 is coated with grease having a viscosity (harder) higher than that of the oil enclosed in the body portion 8a.
When an axial force is applied to the antivibration shaft 9, this grease has a function of causing the antivibration shaft 9 to slowly slide from the bottomed tubular portion 25 in the direction of the force due to its viscosity.

FIG. 3 shows the relationship between the rubber container 8 and the anti-vibration shaft 9 when the reproduction substrate 4 is locked in the housing 1. The reproduction substrate 4 is pulled up to the ceiling of the housing 1. , Anti-vibration shaft 9
A part of the rubber container 8 is pulled out from the bottomed cylindrical portion 25. However, the vibration-proof shaft 9 does not completely come out of the bottomed tubular portion 25, but the tip of the vibration-proof shaft 9 remains in the bottomed tubular portion 25. On the other hand, in the rubber container 8, the vibration-proof shaft 9
Since the external force that deforms the lid body 8a does not act on the lid body 8c by coming off from 25, the outer shape is kept in the initial state in which the lid body 8c is not deformed. Then, when the lock of the reproduction substrate 4 is released, the lid 8c is once deformed so as to sink the bottomed tubular portion 25 into the body portion 8a as shown by the phantom line in FIG.
However, the reaction force of this deformation causes the lid 8c to elastically return to the initial position while discharging the air at the bottom of the bottomed tubular portion 25 from the concave groove 9c.

FIG. 5A shows a state in which the disc is mounted on the reproduction substrate. At this time, the support plate 17 is rotated in a direction in which the feed roller 13 is in contact with the guide plate 12, the triangular protrusion 17a is brought into contact with the edge of the square hole 21, and the reproduction substrate 4
Press the tips of both side surfaces 4a of the above against the ceiling 1b of the housing 1,
The reproduction substrate 4 is lifted from the neutral position. By pressing the reproduction substrate 4 against the ceiling 1b of the housing 1 in this manner, the disc insertion opening 31 formed in the cabinet 30 can be arranged on the upper end side of the cabinet 30. And at this time, the anti-vibration shaft 9
A part of the rubber container 8 is pulled out from the bottomed cylindrical portion 25. Then, when the disc is transported to the reproduction position on the turntable 2, the support plate 17 is moved to the reproduction position as shown in FIG.
The feed roller 13 is rotated in the direction away from the disc. This rotation of the support plate 17 causes the support plate 17 to move to the triangular protrusion 17a.
From the square hole 21 and the tips 4a on both sides of the recycled substrate 4
Is separated from the ceiling 1b of the housing 1. Then, the recycled substrate 4
It is suspended in a neutral position in the housing 1 by a spring 5. At this time, the vibration-proof shaft 9 sinks into the bottomed tubular portion 25 at the portion that has been removed from the bottomed tubular portion 25 while discharging air through the concave groove 9c.

As shown in FIG. 6, when the recycled substrate 4 suspended by the spring 5 causes free vibration in the axial direction of the vibration-proof shaft 4, the bottomed cylindrical portion 25 and the vibration-proof shaft 9 have a viscosity. Since it is connected with high grease, the bottomed tubular portion 25 and the vibration-proof shaft 9 together vibrate. On the other hand, if a vibration with a long cycle such as disk replacement is applied in the axial direction of the vibration-proof shaft 9, the vibration-proof shaft 9 will exert a unidirectional force over a long period of time, thus resisting the viscosity of grease. Air can be allowed to flow out from the bottomed tubular portion 25 while allowing air to flow into the bottom of the bottomed tubular portion 25 through the concave groove 9c. That is, when the reproduction substrate 4 is pulled up to the ceiling 1b of the housing 1 and locked, the vibration isolation shaft 9 can be easily pulled out from the bottomed tubular portion 25.

According to the present embodiment, in the present invention, the housing is
The opening 8g of the rubber container 8 is arranged on the bottom surface 1a of 1 upward, and the reproduction substrate 4 mounted with the antivibration shaft 9 facing the bottom surface 1a is mounted from the open side above the housing 1. ing. In this way, when the rubber container 8 is arranged on the bottom surface 1a of the housing 1 with the opening 8g of the bottomed tubular portion 25 facing the ceiling, the vibration-proof shaft can be mounted only by mounting the reproduction substrate 4 from above the housing. 9 can be fitted into the bottomed tubular portion 25 of the rubber container 8. As a result, the oil damper 7 can be attached to the reproduction substrate 4 and the housing 1 very easily. Further, although the antivibration shaft 9 is coated with grease in the description of the present embodiment, the fitting state of the bottomed tubular portion 25 and the antivibration shaft 9 is
Reproduction board with a long cycle like mounting a disc in the reproduction section
It is not always necessary to apply grease if the vibration-proof shaft 9 can be moved out of the bottomed tubular portion 25 when the 4 is moved. Further, although the groove 9c is formed on the vibration-proof shaft 9 side, it may be formed on the inner wall of the bottomed tubular portion 25.

[0016]

The anti-vibration device for the disc player according to the present invention comprises:
It is composed of a spring 5 and an oil damper 7 that connect between a reproduction substrate 4 equipped with a reproduction unit and the housing 1.
Is made up of a rubber container 8 having a bottomed tubular portion 25 having an opening 8g on the surface and filled with oil, and a shaft 9 fitted into the bottomed tubular portion 25. Then, a ventilation path 9c for ventilating between the inner bottom portion of the bottomed tubular portion 25 and the opening 8g is provided.
When the reproduction substrate 4 is pressed against the ceiling 1b of the housing 1 and the reproduction substrate 4 is kept in a state where migration is prohibited, the ventilation passage 9
Air is passed through c so that the shaft 9 can move outward from the bottomed tubular portion 25. Since the shaft 9 can be easily moved outward from the bottomed tubular portion 25 in this way, the rubber container 8 can be made into a free shape by its own elasticity and deterioration of the rubber portion can be prevented. It can be prevented.

[Brief description of drawings]

FIG. 1 is a perspective view showing an in-vehicle disc player to which a vibration isolation device of the present invention is attached.

FIG. 2 is a perspective view showing an oil damper.

FIG. 3 is a side sectional view showing a state of the oil damper and the vibration isolation shaft before the disc is mounted on the reproduction substrate.

FIG. 4 is a side sectional view showing a state of the rubber container and the vibration isolation shaft after the disc is mounted on the reproduction substrate.

FIG. 5 is a side view showing the inside of the casing showing a state before and after a disc is mounted.

FIG. 6 is a side sectional view showing a state of the oil damper when the reproduction substrate is vibrating.

[Explanation of symbols]

1 case 4 Recycled board 5 springs 7 Oil damper 8 rubber containers 9 axes 9c air passage 25 Bottomed cylindrical part

Claims (4)

[Claims] 1. A reproduction substrate (4) equipped with a reproduction unit and a housing (1)
A regenerative substrate is movably held in the housing by a spring (5) and an oil damper (7) connecting between the oil damper and the oil damper (7). It is composed of a rubber container (8) having a bottomed tubular part (25) that opens outward (8 g) to the outside, and a shaft (9) fitted to the bottomed tubular part. In a vibration isolator of a disk player in which one of the container and the shaft is attached to the playback substrate and the other is attached to the housing, a ventilation path (9c) that connects the inner bottom of the bottomed tubular portion and the outside of the oil damper Is provided on at least one of the inner peripheral surface and the shaft of the bottomed cylindrical portion, and the bottomed cylindrical portion and the shaft are integrated in a state where the reproduction substrate is movably held in the housing, and the reproduction substrate is packaged. When pressing against the ceiling of the body to prohibit migration of the recycled substrate, outside air circulates through the ventilation passage and the shaft is removed from the bottomed cylindrical portion. Vibration damper disc player being characterized in that so as to move to. 2. An anti-vibration device for a disk player according to claim 1, wherein grease is applied to an outer peripheral surface of the shaft of the oil damper. 3. The vibration isolator according to claim 2, wherein the grease has a viscosity higher than that of the oil filled in the rubber container of the oil damper. 4. The vibration isolator according to claim 1, wherein the shaft of the oil damper is made of synthetic resin, and the air passage is formed in a groove shape on the outer peripheral surface of the shaft.