JP2007024068A - Viscous fluid filled damper, and its mounting structure and method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a viscous fluid filled damper for damping vibration to be transmitted between a supporting body and a supported body, while hardly releasing the supporting body or the supported body being joined to the viscous fluid filled damper with vibration, and to provide its mounting structure. <P>SOLUTION: The viscous fluid filled damper 31 comprises a hard part 37 which has a bearing face 35a for abutting on the supporting body or the supported body and a fixing protrusion 37 protruded from the bearing face 35a for passing through a mounting hole 41b of a damper mounting portion 41a of the supporting body or the supported body until locked at its front end to the hole edge of the mounting hole 41b with deformation. Thus, the viscous fluid filled damper 31 can be firmly joined to the supporting body or the supported body. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to vibration damping means for a disk device such as an optical disk device or a magneto-optical disk device used in audio equipment, video equipment, information equipment, various precision equipment, etc. The present invention relates to a viscous fluid-filled damper that attenuates vibration of a supported body such as a mechanical chassis constituted by a pickup, a disk table, and the like, a viscous fluid-filled damper mounting structure, and a viscous fluid-filled damper mounting method.

  As illustrated in FIG. 21, the disk device 1 horizontally chucks a recording and reproduction disk 2 such as an optical disk such as a CD or a CD-ROM or a magneto-optical disk on a disk table 3. The optical pickup 4 approaching the disk 2 is driven to rotate at a high speed integrally with a disk table 3 that is rotationally driven by a motor, and recording and reproduction are performed by tracking in the radial direction of the disk. The disk device 1 connects the mechanical chassis 5 and the housing 6 of the disk device 1 with a coil spring 7, and a viscous fluid-filled damper 8 is interposed between the mechanical chassis 5 and the housing 6, thereby Vibration is blocked or damped.

  As shown in FIG. 22, the viscous fluid-filled damper 8 has a lid portion 9 made of a hard resin, a peripheral wall portion 10 made of a hard resin that rises perpendicularly from the lid portion 9, and a flexible material that forms a bellows made of a thin rubber-like elastic body. A sealed container is formed by the portion 11 and the stirring recess 12 protruding into the damper, and a viscous fluid 13 such as silicone oil is sealed in the sealed container. The viscous fluid-filled damper 8 is attached by inserting the screw 9b into the screw hole 9a provided in the lid portion 9 and fastening it to the housing 6, while the stirring shaft 14 provided in the mechanical chassis 5 is placed in the stirring recess 12. It is performed by being combined with the mechanical chassis 5 by inserting.

  In the viscous fluid-filled damper 8 according to this conventional example, when strong vibration or impact occurs in the mechanical chassis 5 or the housing 6, the stirring shaft 14 inserted into the stirring recess 12 slides on the inner wall surface 12 a of the stirring recess 12 and is inserted. May become incomplete and the vibration damping function may be reduced. Further, the stirring shaft 14 may come out of the stirring recess 12.

On the other hand, in order not to cause these problems, a viscous fluid-filled damper in which a portion corresponding to the stirring recess 12 and a portion corresponding to the stirring shaft 14 are integrally formed in advance is disclosed in, for example, Japanese Patent Application Laid-Open No. 2003-139188 (Patent Document). 1). The viscous fluid-filled damper 21 described in Patent Document 1 is schematically shown in FIG. 23. The stirring concave portion 22 and the stirring shaft 24 are integrally formed in advance, and two flange portions 24a are formed on the stirring shaft 24. , 24b are provided. On the other hand, as shown in FIG. 24, the mechanical chassis 5 is also formed with an insertion opening 5a into which the flange portion 24b can be inserted and a slide hole 5b having a width enough to pass through the central portion 24c of the stirring shaft 24. The flange portion 24b is inserted into the opening 5a, and the central portion 24c of the stirring shaft 24 is moved and fixed to the slide hole 5b.
JP 2003-139188 A

  However, the viscous fluid-filled damper 21 may come off the mechanical chassis 5 when vibration is applied in a direction opposite to the direction in which the stirring shaft 24 is pushed into the slide hole 5b. Further, in order to easily move the agitation shaft 24 to the slide hole 5b and make it difficult to come out of the slide hole 5b, it is necessary to place both flange portions 24a and 24b under an appropriate interval. There is a problem that it becomes difficult to insert 24 or easily come out of the slide hole 5b. Furthermore, if the plate thickness on the mechanical chassis 5 side to which the viscous fluid-filled damper 21 is attached changes, the distance between the two flange portions 24a and 24b must be adjusted according to the thickness, but both the flange portions 24a. , 24b is determined in advance, it is necessary to prepare a large number of varieties having different intervals between the flange portions 24a, 24b.

  Therefore, the present invention has been made for the purpose of obtaining a viscous fluid-filled damper and its mounting structure in which the coupling between the support body or the supported body and the viscous fluid-filled damper is difficult to come off due to vibration. Another object of the present invention is to obtain a viscous fluid-filled damper that can be mounted without being affected by the thickness of the support or the support and a mounting structure thereof.

  The present invention provides a sealed container formed of a soft part having rubber-like elasticity, a hard part on the support side to be attached to the support, and a hard part on the support side to be attached to the supported body accommodated in the support. A viscous fluid-filled damper that encloses a viscous fluid and attenuates the transmission of vibration between the support and the supported body. At least one of the hard portions on the support side or the supported body side is provided with a support or a supported body. A receiving surface that comes into contact with the mounting surface, and a fixing projection that protrudes from the receiving surface and passes through a mounting hole provided in a damper mounting portion of the support or supported body, and the tip side is deformed to lock the hole edge of the mounting hole And providing a viscous fluid-filled damper.

  Further, the present invention provides a sealed container formed of a soft part having rubber-like elasticity, a hard part on the support side to be attached to the support, and a hard part on the support side to be attached to the supported body accommodated in the support. Viscosity formed by a viscous fluid-filled damper that encloses a viscous fluid inside, a support, and a supported body, and the viscous fluid-filled damper interposed between the support and the supported body attenuates vibration transmission Regarding the mounting structure of the fluid-filled damper, the viscous fluid-filled damper protrudes from the receiving surface and a receiving surface that comes into contact with the supporting body or the supported body on at least one of the hard parts on the supporting body side or the supported body side. A fixing protrusion, and provided with a damper mounting portion having a mounting hole through which the fixing protrusion penetrates the supporting body or the supported body, and the fixing protrusion penetrating the mounting hole. Tip of protrusion A viscous fluid-sealed damper mounting structure is provided in which a coating part is formed by engaging the edge of the mounting hole by deformation and the damper mounting part is sandwiched between the coating part and the receiving surface. To do.

  At least one of the hard part on the support side or the support side, a receiving surface that comes into contact with the support or the support body, and an attachment provided at the damper mounting portion of the support body or the support body protruding from the receiving surface Since the fixing protrusion that penetrates the hole and the front end side is engaged with the hole edge of the mounting hole by deformation is provided, the fixing protrusion penetrates at least one of the support body and the supported body. Because it has a damper mounting part that has a mounting hole that allows the fixing protrusion to pass through the support or supported body, the tip of the protruding fixing protrusion can be deformed by crushing, etc. And a support body or a to-be-supported body can be clamped with a receiving surface. Therefore, the viscous fluid-filled damper can be firmly coupled to the support body or the supported body, and a viscous fluid-filled damper that does not easily come off from the support body or the supported body and its mounting structure can be obtained.

  The fixing protrusion may protrude in a rod shape from the receiving surface. Since it protrudes in a rod shape from the receiving surface, it can be easily pushed into a mounting hole or the like provided in the supporting body or the supported body. In addition, a rod shape here excludes a shape in which a flange is formed or a portion corresponding to a snap fit is formed, a branch and leaf portion is provided, or a precise processing is performed, It means a monotonous protruding state. Accordingly, the bar shape also includes those that change gradually, such as being gradually narrowed toward the tip direction or being generally bent.

  The fixing protrusion can be configured to protrude vertically from the sealed container. The vertical direction from the airtight container means a direction in which the radius extends from the center when the airtight container is regarded as one spherical body that encloses the viscous fluid. For example, in a viscous fluid-filled damper having a flat lid portion on one side of the soft portion and a fixing protrusion on the other side of the soft portion, the direction perpendicular to the lid portion can be mentioned. In other words, when the imaginary line connecting the coupling center between the support and the viscous fluid-filled damper and the coupling center between the supported body and the viscous fluid-filled damper is assumed, the extension direction of the imaginary line is substantially the same. The same direction.

  Since the fixing protrusion protrudes from the sealed container in the vertical direction, if the fixing protrusion is crushed after being attached to the support or the supported body, the thickness of the fixing protrusion in the protruding direction can be reduced. .

  Further, the fixing protrusion can be configured to protrude in a direction parallel to the sealed container. The direction parallel to the airtight container means a tangential direction in contact with the arc when the airtight container is regarded as one spherical body that encloses the viscous fluid. For example, in a viscous fluid-filled damper having a flat lid portion on one side of the soft portion and a fixing protrusion on the other side of the soft portion, a direction parallel to the lid portion may be mentioned. In other words, when a single imaginary line connecting the coupling center between the support and the viscous fluid-filled damper and the coupling center between the supported body and the viscous fluid-filled damper is assumed, it is substantially perpendicular to the imaginary line. is there.

  Since the fixing protrusion protruded in a direction parallel to the sealed container, when attaching the viscous fluid-filled damper to the support or the supported body, the heating and pressing direction of the fixing protrusion is the center direction of the viscous fluid-filled damper. Therefore, it can be attached without applying a pressing load to the sealed container. Therefore, stable installation work is possible, and the viscous fluid-filled damper is not damaged when the viscous fluid-filled damper is attached.

  The fixing protrusion can be configured as a thermoplastic resin. If it is made of thermoplastic resin, it can be easily crushed and deformed by heating and pressing the tip of the fixing projection, and it can be easily softened and deformed by performing ultrasonic irradiation treatment. it can. Therefore, it can be set as the viscous fluid enclosure damper with easy handling. In addition, a viscous fluid-filled damper mounting structure can be obtained in which the support or the supported body is firmly sandwiched between the portion formed by deforming the tip of the fixing protrusion and the receiving surface. Other than the thermoplastic resin, it can be formed of a soft metal material. If a soft metal material is used, the tip of the fixing projection can be easily crushed by hitting the tip of the fixing projection with a hard metal hammer or the like.

  Furthermore, the present invention provides a sealed container formed by a soft part having rubber-like elasticity, a hard part on the support side to be attached to the support, and a hard part on the support side to be attached to the supported body accommodated in the support. A viscous fluid-filled damper mounting method in which a viscous fluid-filled damper that seals a viscous fluid and damps transmission of vibration between the support and the supported body is attached to at least one of the support or the supported body The fixing protrusion of the viscous fluid-filled damper protruding from the receiving surface contacting the support or the supported body is passed through the mounting hole provided in the damper mounting portion of the support or the supported body, and penetrates the mounting hole. A viscous fluid is characterized in that a front end side of the fixing protrusion is deformed to form a covering portion that is engaged with a hole edge of the mounting hole, and the damper mounting portion is sandwiched between the covering portion and the receiving surface. Installing the enclosed damper To provide.

  At least one of the hard portions on the support side or the support side, a receiving surface that comes into contact with the support or the support body, and a mounting hole that protrudes from the receiving surface and is provided in a damper mounting portion of the support body or the support body And a fixing protrusion that is engaged with the hole edge of the mounting hole by deformation, and at least one of the supporting body and the supported body is allowed to pass through the fixing protrusion. Since the damper mounting portion having the mounting hole is provided, the fixing protrusion can be passed through the support or the supported body, and the tip of the protruding fixing protrusion can be crushed. Then, the portion formed by crushing the front end side of the fixing projection is locked with the hole edge of the mounting hole, and the support or supported body is formed by the covering portion and the receiving surface formed by crushing the front end side of the fixing projection. Can be pinched. Therefore, the viscous fluid-filled damper can be firmly coupled to the support body or the supported body, and a viscous fluid-filled damper that does not easily come off from the support body or the supported body and its mounting structure can be obtained.

  Then, a thermoplastic resin is used for the fixing protrusion, and the fixing protrusion can be deformed by heating and pressing the tip of the fixing protrusion. Since a thermoplastic resin is used for the fixing protrusion, the fixing protrusion can be easily crushed and deformed by pressing a heated pressing die or the like on the tip of the fixing protrusion, and the support body or the supported body can be clamped. it can.

  Further, the fixing protrusion can be deformed by using a thermoplastic resin for the fixing protrusion and subjecting the tip of the fixing protrusion to ultrasonic treatment. Since a thermoplastic resin is used for the fixing protrusion, ultrasonic waves are applied to the tip of the fixing protrusion, so that the fixing protrusion can be easily softened and deformed to sandwich the support or the supported body.

  According to the viscous fluid-filled damper and its mounting structure of the present invention, the thickness of the connecting portion between the viscous fluid-filled damper and the support or the supported body can be reduced, and the disk device with the viscous fluid-filled damper attached, etc. Can be made thinner and smaller.

  According to the method for attaching a viscous fluid-filled damper according to the present invention, it is easy to attach a viscous fluid-filled damper to a support or a supported body, and an attachment structure in which the viscous fluid-filled damper is not easily detached from the support or the supported body is obtained. be able to.

  The present invention will be described in detail with reference to the drawings. In addition, in each embodiment, when the material of each member, the manufacturing method, etc. are the same, duplication description is abbreviate | omitted.

1st Embodiment [FIGS. 1-3] : The viscous fluid enclosure damper 31 of 1st Embodiment is shown in FIGS. 1-3. 1 is a cross-sectional view of the viscous fluid-filled damper 31, FIG. 2 is a front view, and FIG. 3 is a plan view. The viscous fluid-filled damper 31 includes a lid portion 32 made of a hard resin, a flexible portion 33 made of a rubber-like elastic body, a connection portion 34 made of a hard resin that connects the lid portion 32 and the flexible portion 33, a support body or a cover. A shaft 35 made of a hard resin and having a receiving surface 35 a that comes into contact with the support and connected to the flexible portion 33 is provided. These constitute a “sealed container” in which a viscous fluid 36 is sealed. And it has the structure where the rod-shaped fixing processus | protrusion 37 which consists of a thermoplastic resin protruded from this airtight container to the orthogonal | vertical direction.

  In the present embodiment, a hard resin that seals one end of the flexible portion 33 that is an annular soft portion is integrally formed in a convex shape in cross section by the shaft body 35 and the fixing projection 37, and the receiving surface 35a is a lid. The fixing protrusion 37 protrudes from the sealed container in a bar shape in a vertical direction, and is positioned substantially parallel to the bottom surface 32 a of the portion 32.

  A disk device 30 in which the viscous fluid-filled damper 31 is attached between a mechanical chassis 41 and a housing 42 is shown in FIG. As shown in FIGS. 5 and 6, the viscous fluid-filled damper 31 is attached to the mechanical chassis 41 and the housing 42, as shown in FIGS. 5 and 6. First, the fixing protrusion 37 of the viscous fluid-filled damper 31 is mounted on the mechanical chassis 41. It inserts in the attachment hole 41b of the part 41a. Since the fixing protrusion 37 is formed in a rod shape, here, in a columnar shape, the fixing protrusion 37 can be protruded from the mounting hole 41b even if the thickness of the damper mounting portion 41a is different. Next, as shown in FIGS. 7 and 8, the fixing protrusion 37 protruding from the damper mounting portion 41a is heated and pressed by a hot press using a pressing die 43 or the like, and is softened and deformed. In this way, as shown in FIG. 9, a covering portion 38 is formed which is engaged with and covers the hole edge 41 c of the mounting hole 41 b provided in the damper mounting portion 41 a, and the viscous fluid-filled damper 31 is fixed to the mechanical chassis 41. Since the fixing protrusion 37 is crushed and deformed, even if there is a gap between the attachment hole 41b and the fixing protrusion 37 penetrated, the hole edge 41c of the attachment hole 41b is covered and the gap Can also be filled. Therefore, the viscous fluid-filled damper 31 and the mechanical chassis 41 can be firmly fixed.

  As the material, shape, and the like of the pressing mold 43, a material that can cover the hole edge 41c of the mounting hole 41b by deforming the fixing projection 37 can be used. For example, a pressing mold 43 made of stainless steel is used. The pressing force and temperature for pressing the fixing protrusion 37 with the pressing die 43 also vary depending on the material and size of the hard resin used for the fixing protrusion 37. For example, when polypropylene resin is used as the fixing protrusion 37, metal The covering portion 38 can be formed by pressing the manufactured pressing die 43 at 165 ° C. to 185 ° C.

In order to deform the fixing protrusions 37, ultrasonic irradiation treatment can be performed instead of hot pressing. The ultrasonic irradiation process is a method of deforming the fixing protrusion 37 by irradiating an ultrasonic wave to a desired location and pressing it. The amount of heat required to deform the hard resin is calculated based on the melting temperature and crystallization energy when using a crystalline resin, and based on the softening or melting temperature when using an amorphous resin. To do. For example, considering that 1 g of nylon is melted, the melting temperature Tm of nylon: 220 ° C., specific heat C: 0.4, normal temperature T: 20 ° C., crystallization energy Ec: 6 cal / g,
Q = (Tm−T) × C + Ec = (220−20) × 0.4 + 6 = 86 cal
It becomes. Therefore,
86cal ≒ 37kg ・ m / sec ≒ 1 / 2HP ≒ 750W
It is. On the other hand, the power of the ultrasonic irradiation device is obtained from pressure × frequency × amplitude × constant (3.14: conversion constant from sine wave to linear motion). Therefore, it is possible to use an ultrasonic irradiation apparatus that normally has a frequency of about 10 KHz to 70 KHz and an output of about 200 W to 3500 W. The ultrasonic irradiation treatment has advantages such as a quick product assembly cycle, easy automation and various condition control, and almost no heating except for the processing portion.

  On the other hand, as shown in FIG. 10, the viscous fluid-filled damper 31 is connected to the housing 42 by screwing the screw hole 34a provided in the connecting portion 34 and the screw hole 42a provided in the housing 42 with screws 44. Do it.

  Next, the material which comprises each part of the viscous fluid enclosure damper 31 is demonstrated. The hard resin forming the lid portion 32, the connecting portion 34, the receiving surface 35a, and the fixing projection 37 is preferably a thermoplastic resin that has good processability and can be integrally formed with a rubber-like elastic body. As the material, considering the required performance such as dimensional accuracy, heat resistance, mechanical strength, durability, reliability, and weight reduction and workability of the target member, polyethylene resin, polypropylene resin, polyvinyl chloride resin, Polystyrene resin, acrylonitrile / styrene / acrylate resin, acrylonitrile / butadiene / styrene resin, polyamide resin, polyacetal resin, polycarbonate resin, polyethylene terephthalate resin, polybutylene terephthalate resin, polyphenylene oxide resin, polyphenylene sulfide resin, polyurethane resin, polyphenylene ether resin, Examples thereof include thermoplastic resins such as modified polyphenylene ether resins, silicone resins, polyketone resins, and liquid crystal polymers. These resins can be used alone or as a composite material. In addition, fillers such as powdered or fibrous metals, glass, and fillers can be added to these thermoplastic resins to improve dimensional accuracy and heat resistance. Among these resins, polypropylene resin is one of preferred resins. This is because if polypropylene resin is used, it can be thermally deformed at about 165 ° C. to 185 ° C. and has good adhesion to materials such as styrene-based thermoplastic elastomer used for the flexible portion 33. And it is preferable to add glass fiber as a filler for polypropylene resin in order to increase heat resistance and strength.

  Among the hard portions, a resin having a low melting temperature and a high rigidity is particularly preferable as the resin used for the fixing protrusion 37. From the viewpoint of ultrasonic irradiation treatment, an amorphous resin that deforms at a relatively low temperature is preferable as long as it is an amorphous resin and a crystalline resin. As the amorphous resin, ABS resin, acrylic resin, styrene resin, polysulfone resin, polycarbonate resin, and noryl resin are preferable. As the crystalline resin, polyethylene resin, polypropylene resin, polyamide resin, polyacetal resin, and polyester resin are preferable. Polypropylene resin is a preferred resin in terms of low cost, relatively low heat distortion temperature, low water absorption, and the like. The addition of a filler such as glass fiber is also preferable because ultrasonic energy transmission works effectively and the strength increases.

  The soft resin used for the flexible portion 33 is preferably a synthetic rubber or thermoplastic elastomer having rubber-like elasticity. Synthetic rubbers include styrene butadiene rubber, butadiene rubber, chloroprene rubber, nitrile butadiene rubber, butyl rubber, urethane rubber, silicone rubber, fluoro rubber, acrylic rubber, etc., and thermoplastic elastomers include styrene, olefin, urethane Various thermoplastic elastomers such as those based on polyester, ester and vinyl chloride are listed. Among these soft resins, styrene-based thermoplastic elastomers are preferable in terms of good adhesiveness with polypropylene resins used as hard portions.

  The viscous fluid 36 is required to have an appropriate viscosity, stability over time in the sealed container, heat resistance, and the like in order to viscously flow and absorb vibration energy in the sealed container. As the viscous fluid 36, in addition to a liquid alone, a liquid to which solid particles that do not react and dissolve in the liquid are added is preferably used. For example, in addition to the case of silicone oil alone, silicone grease in which solid particles that react and do not dissolve in silicone oil are dispersed. Silicone oils include dimethyl silicone oil, methylphenyl silicone oil, methyl hydrogen silicone oil, fluorine-modified silicone oil, and the like. As solid particles that do not react or dissolve in silicone oil, silicone resin powder, polymethylsilsesquioxane powder, wet silica particles, dry silica particles, glass beads, glass balloons, etc., or those particles were surface treated And the like. These liquid and solid particles can be used alone or in combination.

  The viscous fluid-filled damper 31 made of these materials can be integrally formed by a resin molding method such as two-color molding of a hard resin material and a soft resin material.

  The viscous fluid-filled damper 31 thus obtained is securely coupled to the housing 42 of the disk device 30 and the mechanical chassis 41, and the coupled state does not come off even when subjected to strong vibrations in all directions. Therefore, it is possible to obtain the disk device 30 having stable vibration isolation characteristics. Further, the distance between the mechanical chassis 41 and the housing 42 can be reduced, and the disk device 30 can be reduced in size and thickness.

Second Embodiment [FIGS. 11 to 13] FIG. 11 to FIG. 13 show a viscous fluid-filled damper 51 according to a second embodiment of the present invention. 11 is a cross-sectional view of the viscous fluid-filled damper 51, FIG. 12 is a front view, and FIG. 13 is a plan view. The difference from the viscous fluid-filled damper 31 shown in the first embodiment is the shaft body 55 having the receiving surface 55a and the fixing protrusion 57. That is, as shown in FIG. 11, the cross section of the shaft body 55 is L-shaped, and the receiving surface 55 a is formed substantially perpendicular to the bottom surface 52 a of the lid portion 52. The fixing protrusion 57 is formed so as to protrude from the receiving surface 55a in the vertical direction, that is, in parallel to the sealed container. The structure and material of the lid portion 52, the flexible portion 53, the connection portion 54, the viscous fluid 56, and the like are the same as those of the viscous fluid sealing damper 31.

  FIG. 14 shows a disk device 50 in which this viscous fluid-filled damper 51 is attached between a mechanical chassis 61 and a housing 62. To attach the viscous fluid-filled damper 51 to the mechanical chassis 61 and the housing 62, the fixing protrusion 57 is inserted into the mounting hole 61b of the damper mounting portion 61a provided on the mechanical chassis 61 as shown in FIG. Next, as shown in FIG. 16, the fixing protrusion 57 is protruded from the portion of the fixing protrusion 57 protruding from the damper mounting portion 61 a by hot pressing using a metal pressing die 63 or the like, or ultrasonic irradiation. Heat, press and soften to deform. In this manner, the mounting hole 61b provided in the damper mounting portion 61a and the covering portion 58 that covers the hole edge 61c are formed. The viscous fluid-filled damper 51 and the housing 62 are connected by screwing with a screw 64 or the like.

  In the viscous fluid-filled damper 51 of the present embodiment, since the fixing protrusion 57 protrudes in a direction parallel to the sealed container, when the fixing protrusion 57 is crushed, it is pressed toward the inside of the viscous fluid-filled damper 51. There is nothing to do. Therefore, the viscous fluid-filled damper 51 can be attached to the mechanical chassis 61 without being deformed, and the viscous fluid-filled damper 51 is not damaged. Then, the viscous fluid-filled damper 51 is securely coupled to the housing 62 and the mechanical chassis 61, and the coupled state does not come off even when subjected to strong vibrations in any direction, and a disk device 50 having stable vibration-proof characteristics is obtained. Can do.

  The attachment structure of the viscous fluid-filled damper 51 in the present embodiment is configured so that the viscous fluid-filled damper is attached in a different direction compared to the case where the viscous fluid-filled damper 31 shown in the first embodiment is used. . That is, for example, since the fixing projection 57 is coupled through the mechanical chassis 61 perpendicularly to the left and right direction in FIG. 14, the coupling state is maintained even when strong vibration occurs in the left and right direction. can do.

Third Embodiment [FIGS. 18 to 20] FIG. 18 to FIG. 20 show a viscous fluid-filled damper 71 according to a third embodiment of the present invention. 18 is a cross-sectional view of the viscous fluid-filled damper 71, and FIGS. 19 and 20 are explanatory views of a method for attaching and attaching the viscous fluid-filled damper 71 to the mechanical chassis 81 and the casing 82. FIG. The difference from the viscous fluid-filled damper 31 shown in the first embodiment is that a fixing protrusion 83b is provided at a place where the viscous fluid-filled damper 31 is coupled to the housing 82. That is, as shown in FIG. 18, in addition to the fixing protrusion 77a protruding from the shaft body 75, the fixing protrusion 77b protruding from the connecting portion 74 in the opposite direction to the fixing protrusion 77a is provided. The structure and material of the lid portion 72, the flexible portion 73, the viscous fluid 76, and the like are the same as those of the viscous fluid-filled damper 31.

  In order to attach the viscous fluid-filled damper 71 between the mechanical chassis 81 and the housing 82, as shown in FIG. 19, a fixing projection 87a is provided with a mounting hole 81b of a damper mounting portion 81a provided on the mechanical chassis 81. The fixing projection 77a protruding from the mounting hole 81b is heated and pressed by the pressing die 83a. On the other hand, the fixing protrusion 87b is inserted into the mounting hole 82a provided in the housing 82, and the fixing protrusion 77b protruding from the mounting hole 82a is heated and pressed by the pressing die 83b. Thus, the mounting hole 81b provided in the damper mounting part 81a and the covering part 78a covering the hole edge 81c are formed, while the mounting hole 82a provided in the housing 82 and the covering part 78b covering the hole edge 82b are formed. Form.

  In the viscous fluid-filled damper 71 of this embodiment, both the coupling to the mechanical chassis 81 and the coupling to the housing 82 are made by the covering portions 78a and 78b deformed from the fixing projections 77a and 77b. The enclosure damper 71 is securely coupled to the casing 82 and the mechanical chassis 81, and the coupled state does not come off even when subjected to strong vibrations in any direction, and a disk device having stable vibration isolation characteristics can be obtained.

Modification Example of Embodiment : In the first embodiment and the second embodiment, the fixing protrusions 37 and 57 are configured by the same member as the shaft bodies 35 and 55 having the receiving surfaces 35a and 55a. 37 and 57 and the shaft bodies 35 and 55 can also be provided as separate members. That is, while the shaft bodies 35 and 55 are formed of a heat-resistant hard resin, the fixing projections 37 and 57 are formed of a hard resin that is easily thermally deformed, so that the receiving surfaces 35a and 55a are hardly thermally deformed. The fixing protrusions 37 and 57 can be easily thermally deformed, and the viscous fluid-filled dampers 31 and 51 can be attached to the mechanical chassis 41 and 61 with high dimensional accuracy.

  The connection between the connection portion 34 and the housing 42 in the first embodiment and the connection between the connection portion 54 and the housing 62 in the second embodiment are screwed. However, the present invention is not limited to this. For example, the connection portion 34 , 54 and the lids 32 and 52 may be provided with convex portions, and the casings 42 and 62 may be provided with concave portions and fitted and coupled. It is also possible to attach to the housings 42 and 62 in a predetermined coupling end shape called a snap fit. Furthermore, in the third embodiment, the connection between the mechanical chassis 81 and the housing 82 is made using the fixing projections 77a and 77b. Of these, the connection with the mechanical chassis 81 is secured by screws or the like. It is also possible to do this.

  Although the fixing protrusions 37 and 57 are both cylindrical, the form can be changed such that the tip is narrowed so as to be easily inserted into the mounting holes 41b and 61b. Further, in order to obtain a stronger fixing state, it is also possible to have a plurality of fixing protrusions protruding from the receiving surfaces 35a and 55a instead of the single fixing protrusions 37 and 57. In this case, it is preferable to provide a plurality of mounting holes for receiving the fixing protrusions corresponding to the number of the fixing protrusions.

  The fixing protrusions 37, 57, 77a, and 77b are made of thermoplastic resin. However, the fixing protrusions 37, 57, 77a, and 77b can be made of a soft metal, for example, an aluminum alloy or a zinc alloy. Alternatively, the tip of the fixing protrusion may be crushed with a hard metal hammer.

  The shaft body 35 of the viscous fluid-filled damper 31 and the shaft body 55 of the viscous fluid-filled damper 51 are not so shaped as to protrude greatly into the sealed container, but instead of this, the conventional viscous fluid-filled damper 8 is provided with stirring. It is also possible to provide a so-called stirring rod that protrudes into the sealed container, such as the recess 12, together with the fixing protrusions 37 and 57.

  Since the present invention can attenuate the vibration of a mechanical chassis constituted by a motor, an optical pickup, a disk table, etc., it can be used for vibration attenuation of a disk device such as an optical disk device or a magneto-optical disk device. The present invention is not limited to these disk devices, and can be applied to various electric / electronic devices that need to control vibration.

The SA-SA sectional view taken on the line of FIG. 3 which shows the viscous fluid enclosure damper by 1st Embodiment. The front view of the viscous fluid enclosure damper of FIG. The top view of the viscous fluid enclosure damper of FIG. The schematic diagram which shows the internal structure of the disc apparatus which attached the viscous fluid enclosure damper of FIG. Explanatory drawing of the attachment method to the mechanical chassis of the viscous fluid enclosure damper of FIG. Explanatory drawing of the attachment method following FIG. Explanatory drawing of the attachment method following FIG. Explanatory drawing of the attachment method following FIG. Explanatory drawing of the attachment method following FIG. Explanatory drawing of the attachment method following FIG. SB-SB sectional view taken on the line of FIG. 13 which shows the viscous fluid enclosure damper by 2nd Embodiment. The front view of the viscous fluid enclosure damper of FIG. The top view of the viscous fluid enclosure damper of FIG. The schematic diagram which shows the internal structure of the disc apparatus which attached the viscous fluid enclosure damper of FIG. Explanatory drawing explaining the attachment method to the mechanical chassis of the viscous fluid enclosure damper of FIG. Explanatory drawing of the attachment method following FIG. Explanatory drawing of the attachment method and attachment state following FIG. Sectional drawing of the viscous fluid enclosure damper by 3rd Embodiment. Explanatory drawing of the attachment method to the mechanical chassis and housing | casing of the viscous fluid enclosure damper of FIG. Sectional drawing of the state which attached the viscous fluid enclosure damper of FIG. 18 to the mechanical chassis and the housing | casing. The schematic diagram which shows the internal structure of the disc apparatus which attached the conventional viscous fluid enclosure damper. Explanatory drawing explaining the attachment method to the mechanical chassis and housing | casing of the conventional viscous fluid enclosure damper shown in FIG. Sectional drawing equivalent to the SC-SC line of FIG. 24 which shows the use condition of the viscous fluid enclosure damper of another prior art example. The fragmentary perspective view showing the upper part from the mechanical chassis of the state which attached the viscous fluid enclosure damper of FIG. 23 to the mechanical chassis.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Disc apparatus 2 Disc 3 Disc table 4 Optical pick-up 5 Mechanical chassis 5a Insertion opening 5b Slide hole 6 Case 7 Coil spring 8,21 Viscous fluid enclosure damper (conventional example)
9 Lid portion 9a Screw hole 9b Screw 10 Peripheral wall portion 11 Flexible portion 12, 22 Stirring recess 12a Inner wall surface
13 Viscous fluid 14, 24 Stirrer shaft 24a, 24b Flange 24c Center 30, 30 Disk device 31, 51, 71 Viscous fluid filled damper 32, 52, 72 Lid 32a, 52a, 72a Bottom 33, 53, 73 Flexible Portions 34, 54, 74 Connection portions 34a, 54a Screw holes 35, 55, 75 Shaft bodies 35a, 55a, 75a Receiving surfaces 36, 56, 76 Viscous fluid 37, 57, 77a, 77b Fixing protrusions 38, 58, 78a, 78b Cover part 41, 61, 81 Mechanical chassis 41a, 61a, 81a Damper mounting part 41b, 61b, 81b Mounting hole 41c, 61c, 81c Hole edge 42, 62, 82 Housing 42a, 62a Screw hole 82a Mounting hole 82b Hole edge 43, 63, 83a, 83b Push mold 44, 64 Screw

Claims (10)

Viscous fluid is enclosed in a sealed container formed by a soft part having rubber-like elasticity, a hard part on the support side to be attached to the support, and a hard part on the support side to be attached to the supported body accommodated in the support. In the viscous fluid-filled damper that attenuates the transmission of vibration between the support and the supported body,
At least one of the hard parts on the support side or the support side, a receiving surface that comes into contact with the support or the support body, and an attachment that protrudes from the receiving surface and is provided on a damper mounting portion of the support body or the support body A viscous fluid-filled damper having a fixing projection penetrating through a hole and having a distal end side engaged with a hole edge of the mounting hole by deformation.   The viscous fluid-filled damper according to claim 1, wherein the fixing protrusion protrudes in a rod shape from the receiving surface.   The viscous fluid-filled damper according to claim 1, wherein the fixing protrusion protrudes vertically from the sealed container.   The viscous fluid-filled damper according to claim 1, wherein the fixing protrusion protrudes in a direction parallel to the sealed container.   The viscous fluid-filled damper according to any one of claims 1 to 4, wherein the fixing protrusion is made of a thermoplastic resin. Viscous fluid is enclosed in a sealed container formed by a soft part having rubber-like elasticity, a hard part on the support side to be attached to the support, and a hard part on the support side to be attached to the supported body accommodated in the support. The viscous fluid-filled damper mounting structure is formed of a viscous fluid-filled damper, a support body, and a supported body, and the viscous fluid-filled damper interposed between the support body and the supported body attenuates vibration transmission In
The viscous fluid-filled damper is provided with a receiving surface that comes into contact with the supporting body or the supported body, and a fixing protrusion that protrudes from the receiving surface, on at least one of the hard parts on the supporting body side or the supported body side. Is,
The support body or the support body is provided with a damper attachment portion having an attachment hole that allows the fixing protrusion to pass through.
The front end side of the fixing protrusion penetrating the mounting hole forms a covering portion that is engaged with the hole edge of the mounting hole by deformation, and the damper mounting portion is sandwiched between the covering portion and the receiving surface. A viscous fluid-filled damper mounting structure.   7. The viscous fluid-filled damper mounting structure according to claim 6, wherein the supported body is a mechanical chassis for reproducing a disk-shaped recording medium, and the support body is a housing of the disk device. Viscous fluid is enclosed in a sealed container formed by a soft part having rubber-like elasticity, a hard part on the support side to be attached to the support, and a hard part on the support side to be attached to the supported body accommodated in the support. In the method of attaching a viscous fluid-filled damper, the viscous fluid-filled damper that attenuates the transmission of vibration between the support and the supported body is attached to at least one of the support or the supported body.
Passing the fixing protrusion of the viscous fluid-filled damper protruding from the receiving surface abutting against the support or the support through a mounting hole provided in the damper mounting portion of the support or the support,
Deforming the front end side of the fixing protrusion penetrating the mounting hole to form a covering portion to be engaged with the hole edge of the mounting hole;
A method for mounting a viscous fluid-filled damper, wherein the damper mounting portion is sandwiched between the covering portion and the receiving surface.   9. The method of mounting a viscous fluid-filled damper according to claim 8, wherein a thermoplastic resin is used for the fixing protrusion, and the tip of the fixing protrusion is heated and pressed to deform the fixing protrusion.   9. The method of attaching a viscous fluid-filled damper according to claim 8, wherein a thermoplastic resin is used for the fixing protrusion, and the tip of the fixing protrusion is subjected to ultrasonic treatment to deform the fixing protrusion.

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