JP2001057068A - Viscous fluid sealed damper - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make it possible to easily assure whether a shaft of a CD player, etc., is inserted into a shaft insertion part of a viscous fluid sealed damper or not when the shaft is inserted to the shaft insertion part. SOLUTION: This viscous fluid sealed damper 10 has a cylindrical peripheral wall part 12, a thin flexible part 14 having pliability, the blind cylindrical and pliable shaft insertion part 18 formed in the state of projecting into the peripheral wall part 12 from the central part of the flexible part 14, a bottom wall part 20 and viscous fluid 22 inclosed therein. The shaft insertion part 18 is made translucent and at least either of the bottom wall part 20 and the peripheral wall part 12 is made translucent. The shaft 26 is inserted into the shaft insertion part 18 and is pressed in this state into the bottom wall part 20 or the peripheral wall part 12, by which the shaft insertion state may be made visually checkable from outside.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a viscous fluid-filled damper for supporting an optical disk device such as a CD player in a vibration-proof manner.

[0002]

2. Description of the Related Art Conventionally, compact discs (C
D) When an optical disk device such as a player is mounted, if the vibration of the vehicle is transmitted to the optical disk device as it is, sound skipping or the like will occur. That is being done.

Conventionally, as such a viscous fluid-filled damper, a cylindrical peripheral wall portion, a thin flexible portion having flexibility formed by closing an opening at one axial end of the peripheral wall portion,
A bottomed cylindrical and flexible shaft insertion portion for inserting a shaft of an optical disc device, which is formed so as to protrude from the center of the flexible portion to the inside of the peripheral wall portion, and closes the other axial end opening of the peripheral wall portion. And a bottom wall formed in such a manner that vibration is absorbed based on the viscous flow of a viscous fluid enclosed therein.

FIG. 5 shows an example of a viscous fluid-filled damper using a CD.
This is shown together with the player. In FIG.
Reference numeral 0 denotes a viscous fluid-sealed damper, and 202 denotes a CD vibration-isolated and supported in a floating state by a support 204 via the viscous fluid-sealed damper 200 and a spring 201.
Player.

[0005] The CD player 202 has a turntable 20 on which a compact disk (CD) 206 is mounted and which rotates.
8, a rotation drive unit 210 for rotating this, a CD 206
An optical reading unit 214 that irradiates a laser beam from the objective lens 212 onto the surface of the optical disk and receives reflected light (return light) with a light receiving element, reads information recorded on the CD 206, and guides the movement of the optical reading unit 214; Which are assembled to the floating deck 218.

In this example, a viscous fluid-filled damper 20 is used.
Reference numeral 0 denotes a cylindrical peripheral wall portion 220 as shown in FIG. 5 (B), a thin flexible portion 222 having a form in which one end side of the peripheral wall portion is closed, and silicone inside from a central portion thereof. Bottom portion 226 protruding into viscous fluid 224 such as oil
And a cylindrical shaft insertion portion 228 with a groove. The shaft 230 of the CD player 202 is inserted into the shaft insertion portion 228.

Reference numeral 232 denotes a bottom wall provided so as to close the opening at the other end of the peripheral wall 220. The viscous fluid 224 is sealed in a closed space surrounded by the bottom wall.
In the case of the viscous fluid-filled damper 200 of this example, the support 2
When vibration is applied to the shaft 04, the shaft insertion portion 228 relatively moves inside the viscous fluid 224, and absorbs vibration applied based on the viscous flow of the viscous fluid 224 at this time.

In this example, the peripheral wall 220 comprises an inner peripheral wall 220A and an outer peripheral wall 220B. Thus, the inner peripheral wall portion 220A, the thin flexible portion 222 and the shaft insertion portion 228 are integrally formed of a soft elastomer. On the other hand, the outer peripheral wall portion 220B is made of a hard resin material, and the peripheral wall portion 220 has high rigidity as a whole with respect to the flexible portion 222 and the shaft insertion portion 228.
On the other hand, the bottom wall portion 232 is also made of a hard resin material, and has high rigidity like the peripheral wall portion 220.

Thus, the peripheral wall portion 220 and the bottom wall portion 232
Is made relatively rigid with respect to the flexible portion 222 and the like because the shaft insertion portion 228 is effectively displaced relative to the shaft portion 228, thereby causing the viscous flow of the viscous fluid 224 effectively. This is to enable good vibration absorption.

[0010]

In the viscous fluid-filled damper 200, the shaft insertion portion 228
Is a soft and similarly flexible thin flexible portion 222
, The shaft insertion portion 2
When inserting a shaft (usually made of metal) 230 of an optical disk device such as the CD player 202 into the CD player 202, it is difficult to insert the shaft. Surrounding wall 22
0, since the entire bottom wall portion 232 is made of a colored opaque material, there was a problem that it was not possible to visually confirm whether or not the insertion was successful.

Thus, as shown in FIG.
If the shaft 30 is not sufficiently inserted into the shaft insertion portion 228, the vibration damping function of the viscous fluid-filled damper 200 cannot be sufficiently exerted. The shaft 230 may fall out of the shaft insertion portion 228. Thus, once the shaft 230 comes off, the shaft 23
0 cannot enter the shaft insertion portion 228 again.

In this case, it is conceivable that the shaft insertion portion 228 and the thin flexible portion 222 are made translucent. However, in the viscous fluid-filled damper 200, a viscous fluid (generally silicone oil) 224 having a different viscosity is used depending on the type of the optical disk device and the like. As you can see at a glance, viscous fluid 2
24 itself, so that even if the flexible part 222
Even if is made translucent, the viscous fluid 224 blocks the light, and it is not possible to externally check the insertion state of the shaft 230 into the shaft insertion portion 228 through the flexible portion 222.

[0013]

SUMMARY OF THE INVENTION The present invention has been made to solve such a problem, and the viscous fluid-filled damper of the present invention is provided between an optical disk device and its support. A member for supporting the optical disk device in vibration isolation, comprising: (a) a cylindrical peripheral wall portion; and (b) a flexible thin wall member formed by closing an opening at one axial end of the peripheral wall portion. (C) a bottomed cylindrical and flexible shaft insertion portion formed to protrude from the center of the flexible portion to the inside of the peripheral wall portion and into which the shaft of the optical disk device is inserted; D) a viscous fluid which is enclosed in a bottom wall portion formed so as to close the opening at the other end in the axial direction of the peripheral wall portion and absorbs vibration based on the viscous flow of the viscous fluid; In the fluid-filled damper, the shaft insertion portion is made transparent. Together form, characterized in that at least one of the bottom wall and the peripheral wall has no a translucent.

[0014]

As described above, according to the present invention, the shaft insertion portion of the viscous fluid-filled damper is made translucent and at least one of the bottom wall and the peripheral wall is made translucent. In the case of a viscous fluid-filled damper, by inserting the shaft into the shaft insertion portion and pressing it against the light-transmitting bottom wall or peripheral wall, the shaft can be inserted sufficiently deep into the shaft insertion portion. Can be visually checked from the outside.

In the case of the viscous fluid-filled damper of the present invention, for example, when the bottom wall is made translucent, when the shaft is pressed against the bottom wall while being inserted into the shaft insertion portion, the shaft is moved to the bottom of the shaft insertion portion. When it is inserted deep enough to hit the bottom, the bottom of the translucent shaft insertion part and the inner shaft are in contact with the bottom wall, and this is passed through the translucent bottom wall. It can be confirmed from the outside, and therefore, it can be visually confirmed that the shaft has been sufficiently inserted sufficiently into the shaft insertion portion.

On the other hand, when the shaft is inserted only halfway through the shaft insertion portion, the inserted shaft is pressed against the light-transmitting bottom wall together with the shaft insertion portion.
The shaft insertion part is bent from the middle and comes into contact with the bottom wall part, so that the bent state can be visually confirmed from the outside through the bottom wall part. It can be confirmed that it has not been inserted far enough.

On the other hand, when the peripheral wall is made translucent,
Similarly, when the shaft is inserted into the shaft insertion portion and pressed against the peripheral wall portion, the state of insertion of the shaft into the shaft insertion portion through the light-transmitting peripheral wall portion can be visually confirmed.

As described above, since it is possible to externally check whether or not the shaft is properly inserted into the shaft insertion portion, if the shaft is not sufficiently inserted properly, the insertion operation is performed again to surely insert the shaft. Can be inserted sufficiently well into the shaft insertion portion. As a result, the vibration damping function of the viscous fluid-filled damper can be sufficiently exerted, and the shaft can be prevented from coming out of the shaft insertion portion due to vibration or the like applied during running of the vehicle.

Incidentally, it is not impossible to consider that a thin flexible portion having flexibility is made transparent and the shaft insertion portion is pressed against the shaft insertion portion therefrom to check the insertion state from the outside. However, in this case, the thin flexible portion deforms and escapes, so that it is difficult to bring the shaft insertion portion into close contact with the flexible portion with a sufficient pressing force. Therefore, it is difficult to confirm from the outside, and there is a possibility that the thin flexible portion may be damaged by this.

On the other hand, since the bottom wall portion or the peripheral wall portion is generally made rigid, the shaft insertion portion can be pressed against the shaft and the shaft with sufficient force and brought into close contact therewith, so that external confirmation is easy. .

[0021]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, embodiments of the present invention will be described in detail with reference to the drawings. In FIG. 1, reference numeral 10 denotes a viscous fluid-filled damper for supporting an optical disk device such as a CD player mounted on a vehicle in an anti-vibration manner. , A cylindrical shaft insertion portion 18 with a bottom 16 formed so as to protrude from the center of the flexible portion 14 into the peripheral wall portion 12, and an opening at the other end of the peripheral wall portion 12 And a viscous fluid 22 sealed inside a closed container constituted by the bottom wall portion 20 formed in a closed shape.

The viscous fluid-filled damper 10 is seated and fixed on a support 24 at the bottom wall 20, and the metal shaft 2 of the optical disk device is inserted inside the shaft insertion portion 18.
The optical disk device is supported in a vibration-proof manner in a state where 6 is inserted.
More specifically, when vibration is applied to the support 24, the shaft insertion portion 18 is displaced relative to the bottom wall portion 20, the peripheral wall portion 12 and the like together with the shaft 26, and the vibration is generated based on the viscous flow of the viscous fluid 22 at that time. Absorbs and suppresses transmission of vibration to the optical disk device.

In the viscous fluid-filled damper 10 of the present embodiment, the peripheral wall 12 comprises an inner peripheral wall 12A and an outer peripheral wall 12B. The inner peripheral wall 12A is integrally formed of a soft elastomer together with the thin flexible portion 14 and the shaft insertion portion 18. On the other hand, the outer peripheral wall portion 12B is made of a hard resin material, and the entire peripheral wall portion 12
And the shaft insertion portion 18 has high rigidity.

On the other hand, the bottom wall portion 20 is also made of a hard resin material, and has high rigidity relatively to the flexible portion 14 and the shaft insertion portion 18 like the peripheral wall portion 12. still,
The bottom wall 20 is separate from the peripheral wall 12 and is fixed to an end of the peripheral wall 12 in a liquid-tight manner. A mounting portion 28 is formed to extend from the bottom wall portion 20, and is fixed to the support 24 through a mounting hole 30 provided therein.

In this embodiment, an opaque silicone oil colored in a predetermined color is used as the viscous fluid 22, and the shaft insertion portion 18, the thin flexible portion 14,
Both the peripheral wall portion 12 and the bottom wall portion 20 are transparent or translucent (translucent).

In the case of the viscous fluid-filled damper 10 of this embodiment,
By pressing the shaft 26 to the bottom wall portion 20 or the peripheral wall portion 12 in a state where the shaft 26 is inserted into the shaft insertion portion 18, the shaft insertion portion is pushed deep enough, specifically, to a position where the tip of the shaft 26 hits the bottom portion 16. It can easily be visually confirmed from the outside whether or not it has been inserted deep enough into the device 18.

In other words, when the shaft 26 is inserted into the shaft insertion portion 18 as shown in FIGS. When the shaft 26 is pressed against the light-transmitting bottom wall 20 together with the shaft insertion portion 18 while the flexible portion 14 is flexibly deformed, the shaft 26 and its surroundings are pressed as shown in FIGS. Can be confirmed from the outside through the light-transmitting bottom wall portion 20 so that the shaft 26 is sufficiently inserted into the shaft insertion portion 18 sufficiently deep. It can be confirmed visually.

On the other hand, when the shaft 26 is inserted into the shaft insertion portion 18 as shown in FIGS. 3 (I) and 3 (A), the insertion is insufficient, and the shaft 26 is inserted only halfway through the shaft insertion portion 18. If this is not the case,
When pressed against the bottom wall 20 as shown in (II),
With the shaft insertion portion 18 bent in the middle, the bottom wall 2
Pressed to zero.

In this case, it can be visually confirmed that the shaft insertion portion 18 is bent through the light-transmitting bottom wall portion 20 as shown in FIGS. Can be visually recognized from the outside that the shaft is not sufficiently inserted into the shaft insertion portion 18.

In the case of the viscous fluid-filled damper 10 of this embodiment,
By pressing the shaft 26 against the peripheral wall portion 12 with the shaft 26 inserted into the shaft insertion portion 18 as described above,
It is possible to confirm whether or not the shaft 26 is properly inserted.

When the shaft 26 is inserted into the shaft insertion portion 18 and pressed against the peripheral wall portion 12 as shown in FIG. 4, the shaft 26 is inserted through the light-transmitting peripheral wall portion 12 and the shaft insertion portion 18. It is possible to confirm the insertion state, and thereby to know whether or not the shaft 26 is properly inserted.

In this way, at the time of the shaft inserting operation, it can be checked from the outside whether or not the shaft 26 has been inserted sufficiently well into the shaft insertion portion 18, so that the shaft 26 is not inserted sufficiently well. In this case, the shaft 26 can be reliably inserted into the shaft insertion portion 18 satisfactorily by performing the insertion operation again.

As a result, the vibration damping function of the viscous fluid-filled damper 10 can be sufficiently exerted, and the shaft 26 can be prevented from coming out of the shaft insertion portion 18 due to vibration applied during running of the vehicle.

Although the embodiment of the present invention has been described in detail above, this is merely an example.
0, only one of the peripheral wall portions 12 can be made translucent, and in the above example, the peripheral wall portion 12 is the inner peripheral wall portion 1.
Although the example in which the peripheral wall portion 12B is constituted by the outer peripheral wall portion 12B has been described, the present invention is of course applicable to the case where the peripheral wall portion 12 is constituted by a single material. Further, the present invention can be configured in various modified forms without departing from the gist of the present invention, for example, the present invention is applicable to various forms of viscous fluid-filled dampers other than the above examples.

[Brief description of the drawings]

FIG. 1 is a view showing a viscous fluid-filled damper according to an embodiment of the present invention.

FIG. 2 is an explanatory diagram of a method of checking a shaft insertion state.

FIG. 3 is an explanatory diagram of a method different from FIG. 2 for checking a shaft insertion state.

FIG. 4 is an explanatory view of a method for confirming a shaft insertion state which is different from FIGS. 2 and 3;

FIG. 5 is a diagram showing an example of a conventional viscous fluid-filled damper together with a CD player.

6 is a diagram showing a state in which a shaft is inserted only partway in the viscous fluid-filled damper of FIG. 5;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Viscous fluid sealing damper 12 Peripheral wall part 14 Flexible part 16 Bottom part 18 Shaft insertion part 20 Bottom wall part 22 Viscous fluid 24 Support body 26 Shaft

Claims (1)

[Claims] 1. A member interposed between an optical disk device and a support for supporting the optical disk device in a vibration-proof manner, comprising: (a) a cylindrical peripheral wall; and (b) an axis of the peripheral wall. (C) the optical disk device formed so as to protrude from the central portion of the flexible portion into the interior of the peripheral wall portion. (D) a bottomed cylindrical and flexible shaft insertion portion into which the shaft is inserted, and (d) a bottom wall portion formed so as to close the other axial end opening of the peripheral wall portion. A viscous fluid-filled damper in which a viscous fluid is sealed and which absorbs vibration based on the viscous flow of the viscous fluid. Viscous fluid-filled damper characterized by its performance