JP2003247587A - Damper filled with viscous fluid - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a damper filled with viscous fluid having a simple, thin, and compact structure and also being superior for a damping property and strength. <P>SOLUTION: In a film damper 16 in which viscous fluid 22 is filled in a container 20 made of a flexible film closed in a bag-shape, and an installation member 24 arranged on the flexible film is fixed on a body mechanism unit and supporting plate, and the damper is vibrated and damped by flowing the viscous fluid 22 inside the container by changing a whole shape when both of the container and installation member are relatively displaced each other, the flexible film is formed by laminating resin films with different materials each other into a three-layer, and an inner shape and a surface shape of the container 20 are set to be substantially in a circular shape. <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 a viscous fluid-sealed damper having a viscous fluid sealed therein, and more particularly to a viscous fluid-sealed damper in which a flexible film is closed like a bag to form a container.

[0002]

2. Description of the Related Art When a disc player such as a CD player is mounted on a vehicle or the like, in order to prevent the vibration of the vehicle or the like from being transmitted to the main body mechanism unit of the disc player as it is, a skipping sound or the like is generated. As shown in (A), a viscous fluid-sealed damper 206 is interposed between a main body mechanism unit 202 of a disc player supported via a spring 200 and a support member (support frame) 204. ing.

FIG. 12B shows a specific structure of a viscous fluid-sealed damper 206 conventionally used. As shown in the figure, the viscous fluid-sealed damper 206 includes a container 208 and an inside thereof. And a highly viscous viscous fluid 210 such as silicone oil.

Here, the container 208 has a bottom portion 212 (having a thickness of 1.0 mm) and a cylindrical peripheral wall portion 214 (having a thickness of 1.
0 mm) and a thin flexible portion 216 (thickness is 0.3 mm)
And a stirring portion 218 that projects into the inside of the container 208, that is, the inside of the viscous fluid 210 at the center of the flexible portion 216. The stirring hole 218 has an insertion hole 2 in the axial direction.
20 is formed therein, and as shown in FIG. 12A, the main body mechanism unit 202 as a supported member.
A rigid shaft body 222 made of metal or the like protruding from the is inserted, and the stirring portion 218 is coupled to the supported member (or the support member) via the shaft body 222.

In the viscous fluid-sealed damper 206, the agitating portion 218 projecting into the viscous fluid 210 floats inside based on the relative displacement between the supporting member and the supported member. It absorbs energy by viscous flow and cuts or suppresses vibration transmission.

In the case of the viscous fluid-sealed damper 206, since the viscous fluid 210 is agitated by the displacement of the agitator 218, that is, vibration is absorbed based on the viscous flow, the bottom 212, the peripheral wall 214, etc. It is necessary to suppress deformation as much as possible.

Therefore, for example, the illustrated viscous fluid-sealed damper 2
In the case of No. 06, the bottom portion 212 is made of a hard resin (for example, polypropylene resin), the outer peripheral wall portion 214A of the peripheral wall portion 214 is made of a hard resin such as polypropylene resin, and the inner peripheral wall portion 214B together with the flexible portion 216. It is made of elastomer such as rubber or soft resin and has a thick wall.

However, the viscous fluid-sealed damper 206 having such a structure has the agitating portion 21 at the center of the flexible portion 216.
8 is provided, and the stirring hole 218 is further provided with an insertion hole 220
In addition to the necessity of providing the above, there is a problem that the whole shape is complicated and the manufacturing cost becomes high.

In addition, the viscous fluid-sealed damper 206 is
In order to obtain high damping, it is necessary to deepen the depth of the container 208 composed of the bottom portion 212, the peripheral wall portion 214, etc. Therefore, the height of the container 208, that is, the viscous fluid-sealed damper 20 is inevitable.
The height of 6 (h in FIG. 12 (A)) becomes high, and
In order to ensure the free movement of the stirring unit 218, the shaft body 222
Must be exposed to the outside over a certain size (1 in FIG. 12A), and as a result, the size of the mounting space H of the viscous fluid-sealed damper 206 becomes large.

In recent years, devices such as in-vehicle disc players and AV devices have been reduced in size and thickness, and along with this, viscous fluid-sealed dampers 206 for supporting the vibration isolation thereof.
In particular, there is an increasing demand for miniaturization and thinning, but it is difficult for the conventional viscous fluid-sealed damper 206 to meet the demand.

Further, the conventional viscous fluid-sealed damper 206 as shown in FIG. 12 has a particularly high damping effect when the stirring portion 218 is displaced in the left-right direction (or the direction perpendicular to the paper surface) in the figure, and the vertical direction in the figure. There is a problem that the damping characteristic is directional, such as a relatively low damping effect when displaced, and there is a problem that the shaft 222 is required for mounting.

In addition, a conventional viscous fluid-sealed damper 20
In the case of No. 6, since the viscous fluid 210 is stirred by the displacement of the stirring section 218 inside the regular container 208 surrounded by the rigid bottom section 212 and the peripheral wall section 214, a damping action is obtained.
There is a problem in that it is difficult to sufficiently bring out the damping function of the viscous fluid 210, and inevitably the viscous fluid-sealed damper 206 must be increased in size in order to have the required damping characteristics.

In view of the above, the inventor of the present invention discloses a viscous fluid-sealed damper (film damper) in which a flexible film is closed in a bag shape to form a container and a viscous fluid is sealed therein. ) Is proposed.

According to this film damper, it is possible to solve the above-mentioned various problems of the conventional viscous fluid-sealed damper 206 shown in FIG. That is, in the case of this film damper, unlike the conventional case, the viscous fluid 210 is not viscously flown by the stirring action of the stirring section 218, but the flexible film is bag-shaped based on the relative displacement of the supporting member and the supported member. Since the entire container closed by the deformation is deformed and the viscous fluid inside is forcibly made to viscous flow by the deformation of the container, vibration is damped. There is no need to lengthen the stirring portion 218 or to deepen the inside of the container 208, and the shape is simple and compact, and the size of the mounting space H of the viscous fluid-sealed damper (film damper) can be small, and mounting is possible. It does not require a rigid shaft 222 for use.

As a result, the damper can be made extremely small and thin. That is, by using such a film damper, it is possible to eliminate the stirring section 218 or the shaft body 222, which has been a factor that hinders miniaturization and thinning in the related art, thereby reducing the size of a device such as an in-vehicle disc player or an AV device. ， It becomes possible to fully cope with thinning.

Since the container can be deformed in three dimensions,
Since the damping characteristics have no directionality and the container itself does not have substantial rigidity, the damping function of the viscous fluid inside the container can be fully brought out, and various advantages such as high vibration damping efficiency. Is obtained.

[0017]

[Patent Document 1] Japanese Patent Laid-Open No. 6-117473

[0018]

However, the present inventors have conducted research on a film damper of this type, that is, a damper in which a viscous fluid is enclosed in a container formed by closing a flexible film in a bag shape. Among them, it has been found that the damper of this form has a problem that the damping characteristics, the strength, etc. easily change with temperature, that is, the dependency on temperature is high.

In this damper, the viscous fluid inside is forcibly made to flow with the deformation of the container, that is, with the flexible deformation of the flexible film. Since the flexibility of the flexible film is relatively reduced and the damping characteristics of the damper are greatly affected by the operating temperature, the flexibility and strength of the flexible film are related to the damping characteristics of the damper. And the strength of the damper itself is greatly affected.

[0020]

The viscous fluid-sealed damper (film damper) of the present invention has been devised to solve such a problem. Thus, the claim 1
The flexible film is closed like a bag to form a container, and a viscous fluid is sealed inside, and the flexible film is provided with a fixing portion to a supporting member and a supported member. The supporting member and the supported member A viscous fluid-sealed damper that vibrates and damps by virtue of the flow of viscous fluid inside when the and are displaced relative to each other. The internal shape and the planar shape of the container are substantially circular. It is characterized by

A second aspect of the present invention is characterized in that, in the first aspect, the flexible film is formed by laminating a plurality of resin films made of different materials.

According to a third aspect of the present invention, there is provided the first resin film according to the second aspect, which is highly flexible, and the second resin film which is relatively inferior in flexibility to the first resin film but has high strength. Is laminated to form the flexible film.

[0023]

As described above, according to the present invention, the internal shape and the planar shape of the container are substantially circular, so that the stress acting on the flexible film when the damper is deformed is made uniform. It is possible to increase the strength of the damper itself. In addition, a flexible film is closed like a bag to form a container, and a viscous fluid is sealed inside the film damper. The flexible film is formed by laminating a plurality of resin films of different materials ( According to claim 2), the following effects can be obtained.

That is, when the flexible film has a single-layer structure of a resin film, by using a highly flexible material as the resin film, the damping characteristic is improved even in a low temperature region, that is, a region where the temperature is lower than room temperature. It is possible to hold it. On the contrary, such a highly flexible material inevitably has low strength in a high temperature region, that is, a region having a temperature higher than room temperature, and has a short durable life. That is, it becomes unusable for practical use. On the other hand, when a resin film having high strength is used to form a single layer structure, it is difficult to obtain good damping characteristics in a low temperature region even if the required standard can be satisfied in terms of strength.

However, according to the present invention, when the flexible film is made to have a structure in which a plurality of resin films made of different materials are laminated, by using resin films having different properties, specifically, a flexible resin film is obtained. And a resin film having relatively low flexibility but high strength relative thereto (Claim 3), the flexibility required in the low temperature region and the flexibility film in the high temperature region can be improved. It is possible to satisfy the two contradictory properties of required strength. As a result, the problems inherent to the film damper can be solved well. That is, with such a configuration, the film damper can be practically used as a damper for a vehicle-mounted disc player, AV equipment, or the like.

By making such a thin and compact film damper practically usable, it is possible to obtain the advantage that the usage of this kind of viscous fluid-sealed damper is greatly expanded. Specifically, for example, in a HDD device (hard disk drive device) of a personal computer (personal computer) or the like, conventionally, a thin rubber sheet is simply used to prevent vibration, or a digital video using a disc. A camera or the like simply uses a rubber lump for vibration-proof support, but since the film damper of the present invention has an extremely compact overall shape and can be made extremely thin, it is also used as a damper for these devices. It becomes possible to do. Alternatively, it can also be applied as a damper for various small precision equipment that cannot be handled by the conventional viscous fluid-sealed damper.

In the present invention, an L-LDPE resin (linear low density polyethylene resin) film can be used as the first resin film, and a CPP resin (unstretched polypropylene resin) film can be used as the second resin film. Neither L-LDPE resin film nor CPP resin film is a resin film that has not been stretched, and has a low stiffness and is highly flexible.

The resin used as an ordinary plastic material is generally a stretched resin, which is too stiff, ie, poor in flexibility, as a resin film for the film damper of the present invention, and therefore the present invention It is practically difficult to use it as a resin film for the film damper. On the other hand, L-LDPE resin film, CP
The P resin film is an unstretched film and is highly flexible, and is suitable as a constituent material of the flexible film in the film damper.

In the present invention, a flexible film can be formed by laminating three layers of resin films. Or 3
A flexible film can be formed by laminating a plurality of layers, which is more than one layer. Thus, in these cases, the resin films of the same material can be used as the resin films forming the opposite surfaces of the cross section.

When a flexible film made of a resin film is closed in a bag shape, it is convenient that the flexible film can be easily closed in a bag shape if heat sealing can be used. By forming both surfaces on the opposite side from the same resin film, heat fusion by heat sealing can be favorably performed. Incidentally, even when they are closed by a method other than such heat sealing, the surfaces to be fixed to each other can be satisfactorily fixed because they are made of the same material.

In the present invention, it is desirable that the thickness of the flexible film is within the range of 0.01 to 0.15 mm. The reason is that the thickness of the flexible film is 0.
When the thickness is less than 01 mm, the flexibility is good, but the durability is low. On the other hand, when the thickness is more than 0.15 mm, the flexibility and flexibility of the flexible film itself is deteriorated, and by extension, the film. This is because the vibration damping characteristics of the damper deteriorate.

[0032]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment in which the present invention is applied to an anti-vibration support for an on-vehicle disc player will be described in detail with reference to the drawings. In FIG. 1, reference numeral 10 is a main body mechanism unit (supported member) in the disc player, and 12 is a support frame (supporting member). The main body mechanism unit 10 is elastically supported by the support frame 12 via the spring 14.

A viscous fluid-sealed damper (hereinafter referred to as a film damper) 16A of a comparative example of the present invention is interposed between the main body mechanism section unit 10 and the support frame 12, and the main body mechanism section unit 10 and The support frame 12 is connected via a film damper 16A. In this example, the side surface of the main body mechanism unit 10 and the support frame 1
A film damper 16A is inserted between the two.

The structure of the film damper 16A is specifically shown in FIG. As shown in the figure, the film damper 16A of this example has a form in which the flexible film 18 is closed in a bag shape to form a container 20 and a viscous fluid 22 is enclosed therein. A rigid (here, made of hard resin) mounting member (fixing portion) 24 is fixed to the surface. In this example, the flexible films 18 are joined together by heat sealing to form a bag-shaped container 20. The pair of mounting members 24 are fixed to the flexible film 18 by heat welding.

FIG. 2 shows the film damper 16A in a state before it is assembled to the vehicle-mounted disc player. In this state, the film damper 16A of this example has the following shape, that is, FIG. ), The length of one side L ₀
Has a square shape of 15 mm, and the shape of the inside of the container 20 also has the same square shape. The mounting member 2
4 has a fixing portion 26 to the flexible film 18, a neck portion 28 having a small diameter, and an engaging portion 30 having a diameter larger than this, and in this example, it is shown in FIG. 2 (A). As described above, the size φA of the fixing portion 26 is 7.5 mm and the size φB of the engaging portion 30 is 3 mm.

The flexible film 18 is extremely thin with a thickness (t _{0 in} FIG. 2A) of 30 μm.
That is, the film damper 16A of this example is extremely small and its thickness is also extremely thin.

The film damper 16A of this example has a thickness of 2 mm when the container 20 formed by closing the flexible film 18 in a bag shape is filled with the viscous fluid 22 and pulled vertically in FIG. The shape is changed and its thickness is about 4.5.
mm (H in FIG. 1B) is inserted between the main body mechanism unit 10 and the support frame 12 in the state shown in FIG. Specifically, one of the pair of mounting members 24 is fixed to the main body mechanism section unit 10, the other is fixed to the support frame 12, and the main body mechanism section unit 10 and the support frame 12 are connected via the film damper 16A. Join.

In the case of the film damper 16A of this example, 3
It is deformable in the dimensional direction, and when the main body mechanism unit 10 and the support frame 12 are relatively displaced, the film damper 16A itself is entirely deformed in the displacement direction. Strictly speaking, the container 20 made of the flexible film 18 deforms following the relative displacement direction of the main body mechanism unit 10 and the support frame 12 while forcibly causing the viscous fluid 22 inside to flow viscously. At this time, the vibration is damped by the energy absorption by the viscous flow of the viscous fluid 22.

3 and 4 show the film damper 16A.
Is a schematic representation of the action of. First, FIG. 3 shows the action of the film damper 16A when the main body mechanism unit 10 and the support frame 12 are relatively displaced in the direction away from each other (left-right direction in the drawing).

As shown in FIG. 3 (I), when the main body mechanism unit 10 and the support frame 12 are displaced relative to the film damper 16A in the direction of opening the film damper 16A left and right, the viscous fluid 22 inside the container 20 is moved. Flow in such a manner as to gather in the upper and lower central portions in the figure as indicated by the arrow, and the film damper 16A is deformed in the direction of opening left and right with the flow. FIG. 3 (II) shows a state in which the film damper 16A is thus most opened in the left-right direction in the drawing.

Next, in this state, when the main body mechanism unit 10 and the support frame 12 are relatively displaced in the direction in which they approach each other (the left-right direction in the drawing), the viscous fluid 22 inside the container 20.
This time, on the contrary, the film flows from the central portion in the upward or downward direction, and the film damper 16A is deformed in the left-right closing direction with the flow, and finally the state shown in FIG. 3 (IV) is obtained. Through these movements, the viscous fluid 22 effectively absorbs the energy applied from the outside based on its own viscous flow, thereby damping the vibration.

On the other hand, FIG. 4 shows that when a force is applied to the film damper 16A in the shearing direction, that is, the main body mechanism unit 1
4 shows the action of the film damper 16A when 0 and the support frame 12 are relatively displaced in the vertical direction in FIG. As shown in the figure, at this time, the viscous fluid 22 inside the container 20 flows mainly in the shearing direction as indicated by the arrow in the figure, and the container 20 is deformed, that is, the film damper 1
The deformation of 6A is allowed, and the relative displacement between the main body mechanism unit 10 and the support frame 12 is absorbed. Then, at this time, the energy applied from the outside based on the viscous flow of the viscous fluid 22 is absorbed and the vibration is damped.

The above is a representative example of the case where the main body mechanism unit 10 and the support frame 12 are displaced relative to each other in the left-right direction or the vertical direction. In addition, the main body mechanism unit 10 and the support frame are three-dimensionally moved in all directions. Even when they are displaced relative to each other, the deformation of the container 20, that is, the film damper 16A is allowed along with the viscous flow of the viscous fluid 22, and the main body mechanism unit 10 and the support frame 12
A vibration damping function is achieved by energy absorption during deformation following relative displacement with.

As shown in the enlarged views of FIGS. 1B and 2A, in this example, the flexible film 18 is
CPP resin film 18A (second resin film), L-
LDPE resin film 18B (first resin film), C
It has a three-layer laminated structure of the PP resin film 18A. The CPP resin film 18A and the L-LDPE resin film 18B are integrally formed by coextrusion molding.

Here, the CPP resin film 18A is an unstretched polypropylene resin film, and the L-LDPE resin film 18B is a linear low density polyethylene resin film, which has less branching of polymer molecules than the high pressure low density polyethylene resin film. It is an unstretched resin film. The thickness of each resin film 18A, 18B, 18A is a ratio of 1: 2: 1 (t ₁ : t ₂ : t _{1 in} FIG. 2A), and the total thickness t of the flexible film 18 is t. ₀ is 30 μm as described above.

FIG. 6 shows a flexible film 18 (CPP / L-
LDPE / CPP resin film laminate), single-layer CP
It shows the degree of dynamic Young's modulus (longitudinal elastic modulus) change when the temperature is changed for the P resin film and the single-layer L-LDPE resin film. The thickness of each film is 30 μm. In the figure, a represents a flexible film 18 (laminate), b represents a single-layer CPP resin film, and c represents a single-layer L-LDPE resin film.

As shown in the figure, the single-layer L-LDPE resin film has a low dynamic Young's modulus over the temperature range from -20 ° C to 70 ° C. That is, it shows a high flexibility value. Therefore, if only the damping characteristics are considered, it is preferable that the flexible film 18 is composed of a single layer of L-LDPE resin film. However, the strength of the single-layer L-LDPE resin film is greatly reduced along with the dynamic Young's modulus reduction in a temperature range higher than normal temperature.

On the other hand, the single-layer CPP resin film has a relatively large value of Young's modulus which is relatively dynamic with respect to the single-layer L-LDPE resin film in a temperature range lower than room temperature, and its degree of change is also large. ing. On the other hand, this CP
The P resin film retains excellent strength in a temperature range higher than room temperature.

[0049]

[Table 1]

Table 1 shows the tensile strength of the flexible film 18 (laminate), the CPP resin film, the L-LDPE resin film and the like when the temperature is changed from -20 ° C to 70 ° C. From this table 1, CPP
In the case of a resin film, it exhibits excellent tensile strength in a temperature range higher than room temperature. On the other hand, in the case of the L-LDPE resin film, the tensile strength is greatly reduced in the temperature range higher than room temperature. That is, the flexible film 18 is a single layer of CPP.
Whether the resin film or the single-layer L-LDPE resin film is used, the characteristics required for the film damper 16 cannot be satisfied.

On the other hand, in the case of the flexible film 18 of the present example, which is a laminate of the CPP resin film 18A and the L-LDPE resin film 18B, the drawbacks of the CPP resin film 18A and the L-LDPE resin film 18B are caused. You can correct it and make the most of it. That is, when the flexible film 18 is formed by laminating them, it is possible to satisfy both the characteristics required for the film damper 16 and the strength in the high temperature region.

Incidentally, in FIG. 6, d and e are HD, respectively.
PE (high density polyethylene) resin film and OPP
It shows the temperature dependence of dynamic flexibility in (stretched polypropylene) resin film (note that in FIG. 6 ... 2.E).
+10,3. E + 10, ... is 1 × 10 ² , 1
× 10 ³ , ...)). These d, e and a,
As is clear from comparison with b and c, the laminate of the CPP resin film 18A and the L-LDPE resin film 18B has significantly higher flexibility than the HDPE resin film and the OPP resin film single layer. I understand that there is.

[0053]

[Table 2]

Table 2 shows the CPP resin film 18A, L-
A film damper 16A of this example configured by using a flexible film 18 formed by laminating LDPE resin films 18B
In comparison of the vibration characteristics of No. 1 with a film damper configured using a flexible sheet 18 made of a single-layer L-LDPE resin film and a conventional viscous fluid-sealed damper (two-color damper) 206 shown in FIG. Shows. This table 2
As shown in FIG. 12, the film damper 16A of this example has substantially the same vibration characteristics as the viscous fluid-sealed damper 206 of the conventional form shown in FIG.

The film damper 16A as described above is formed by laminating the flexible L-LDPE resin film 18B as the flexible film 18 and the CPP resin film 18A which is relatively inferior in flexibility but strong in strength. By using such a material, it is possible to satisfy both contradictory properties of the required flexibility in the low temperature region and the required strength in the high temperature region.

Further, the film damper 16A of this example has an extremely compact overall shape and is extremely thin, so that the conventional viscous fluid-sealed damper 206 is shown in FIG.
The size of the mounting space H is small as shown in comparison with, and it can be applied as the film damper 16 of various small precision equipment which cannot be dealt with by the conventional viscous fluid-sealed damper 206. .

Further, in this example, since the flexible film 18 having a three-layer laminated structure is composed of the resin film of the same material, that is, the CPP resin film 18A, on both sides opposite to the cross section, the flexible film 18 When 18 is closed in a bag shape, heat fusion by heat sealing can be favorably performed.

Although the inside of the container 20 of the film damper 16A has a square shape in the above, according to the present embodiment shown in FIG. 7, the inside shape (planar shape) of the container 20 of the film damper 16 has a circular shape. Alternatively, it may have another shape.

In the above-described comparative example and embodiment, the resin mounting member 24 is fixed to the container 20 to form the fixing portion, and the film dampers 16A and 16 are used to form the film dampers 16A and 16 by the mounting member 24. However, as shown in FIGS. 8 and 9, the film damper 16A is replaced by the adhesive member 3 instead of the attachment member 24.
2 may be provided, and the film damper 16A may be fixed to the main body mechanism unit 10 or the support frame 12 using the adhesive layer 32 as a fixing portion. An adhesive layer may be used instead of the adhesive layer 32.

In the comparative example of FIGS. 8 and 9, a film damper 16A is inserted between the lower surface of the main body mechanism unit 10 and the support frame 12. FIG. 10 shows the required mounting space H for the film damper 16A in this case.
It is shown in comparison with the viscous sealing damper 206 of the conventional form that the size of the above can be small.

Further, as shown in FIG. 11, in the film damper 16 of this embodiment, the film damper 16 can be fixed to the main body mechanism unit 10 or the support frame 12 by the adhesive layer 32. is there.

Although the embodiment of the present invention has been described in detail above, this is merely an example. For example, in the above example, the case where it is applied to the anti-vibration support of the in-vehicle disc player has been described as an example, but the film damper 16 of the present invention can be applied to various small precision equipments, for example, for HDD devices of personal computers. It can be used as a film damper for a small video camera or as a film damper for a small video camera.
It has applications to various things.

The above L-LDPE resin film 18B
Instead of this, an EVA (ethylene / vinyl acetate copolymer) resin film may be used in some cases, or various other resin films may be combined to form the flexible film 18. The EVA resin film has a flexibility almost equal to that of the L-LDPE resin film 18B.

In the above example, CPP / L-LDPE / C
The laminated body, that is, the flexible film 18 is configured by a combination of PP resin films, but depending on the case, L-LDP
The flexible film 18 can be made of a laminate of E / CPP / L-LDPE resin films, and the CPP / EVA / CPP resin film, EVA / CPP can be used.
The flexible film 18 can be formed of a laminated body by a combination of the / EVA resin films, and the present invention can be formed in variously modified forms without departing from the spirit of the present invention.

[Brief description of drawings]

FIG. 1 is a view showing a state where a film damper of a comparative example of the present invention is used for vibration-proof support of a disc player.

FIG. 2 is a diagram specifically showing the configuration of the film damper shown in FIG.

FIG. 3 is a diagram illustrating the operation of the same film damper.

FIG. 4 is an explanatory view of the same film damper as that of FIG.

FIG. 5 is an explanatory diagram of advantages of the same film damper.

FIG. 6 is a diagram showing temperature dependence of flexibility of a resin film forming a flexible film in the same film damper.

FIG. 7 is a diagram showing a film damper according to an embodiment of the present invention.

FIG. 8 is a view showing a film damper of a comparative example of the present invention in a mounted state on a disc player.

9 is a diagram specifically showing the configuration of the film damper shown in FIG.

FIG. 10 is an explanatory diagram of advantages of the film damper of FIGS. 8 and 9;

FIG. 11 is a view showing a film damper according to another embodiment of the present invention.

FIG. 12 is a view showing a conventional viscous fluid-sealed damper.

[Explanation of symbols]

10 Main body mechanism unit (supported member) 12 Support frame (support member) 16 Film damper (Viscous fluid filled damper) 18 Flexible film 18A CPP resin film 18B L-LDPE resin film 20 containers 22 Viscous fluid 24 Mounting member (fixed part) 32 Adhesive layer (fixed part)

Claims (3)

[Claims] 1. A flexible film is closed like a bag to form a container, a viscous fluid is sealed inside, and the flexible film is provided with a fixing member for a supporting member and a supported member.
A viscous fluid-sealed damper that vibrates and damps by virtue of the flow of viscous fluid inside when the supporting member and the supported member are displaced relative to each other. A viscous fluid-filled damper characterized by having a circular shape. 2. The viscous fluid-sealed damper according to claim 1, wherein the flexible film is formed by laminating a plurality of resin films made of different materials. 3. The flexible first device according to claim 2.
A viscous fluid encapsulation characterized in that the flexible film is formed by laminating a resin film and a second resin film having relatively low flexibility and relatively strong strength with respect to the first resin film. damper.