JP2010031927A - Viscous fluid-sealed damper and vibration control support deice of disk player using the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a viscous fluid-sealed damper easy in installation to a mechanical deck, and without reducing a damping characteristic thereby, when backlash is caused when an installation shaft part integrally molded in an agitating part is abraded, even when violent vibration is repeatedly applied. <P>SOLUTION: This viscous fluid-sealed damper 22 integral with an installation shaft part 34 is provided for absorbing vibration based on the agitating action to a viscous fluid L of an agitating part 32, by sealing the viscous fluid L inside in a sealed vessel shape. The installation shaft part 34 comprises a core part 44 of a hard resin central part integrally molded in the agitating part 32 in a state of being buried in a burying hole 46 of the agitating part 32, and a soft covering part 57 arranged in a state of being fixed to an outer surface of the core part 44 in an installation part 50 to the mechanical deck, interposed between the core part 44 and the mechanical deck and elastically contacting with the mechanical deck in a close contact state. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a viscous fluid-filled damper in which a viscous fluid such as silicon oil is sealed, and a vibration-proof support device using the same.

Conventionally, in a disc player such as a CD (compact disc) player, an anti-vibration support device using a small viscous fluid-sealed damper in which a viscous fluid such as silicone oil is enclosed in a sealed container is widely used.
In a disc player such as a CD player, particularly a vehicle-mounted one, if the vibration of a vehicle or the like is transmitted as it is to the main body mechanism unit of the disc player, sound skipping occurs. A vibration support device is used.

FIG. 13 shows an example of a conventional anti-vibration support device (disclosed in Patent Document 1 below).
In FIG. 13A, 200 is a main body mechanism unit in which various mechanisms are incorporated in a mechanical deck, 202 is a support frame as a support, and 204 is interposed between the main body mechanism unit 200 and the support frame 202. An elastic member 206 that elastically supports the load of the main body mechanism unit 200 and 206 is also interposed between the main body mechanism unit 200 and the support frame 202, specifically the bottom 208 thereof.
The anti-vibration support device 210 shown in FIG. 13 (a) includes the support frame 202, the elastic member 204, the viscous fluid sealing damper 206, and the like.

  In this example, the viscous fluid-filled damper 206 includes a cylindrical peripheral wall portion 214, a bottom portion 216 that closes one end in the axial direction of the peripheral wall portion 214, and a bottom portion of the peripheral wall portion 214, as shown in FIG. A thin flexible film 220 continuously formed on the peripheral wall 214 at one end opposite to the H.216, and a stirring unit 218 provided in a state of projecting toward the bottom 216 at the center of the flexible film 220. It has, and they comprise the airtight container and the viscous fluid L is enclosed with the inside.

  The viscous fluid-filled damper 206 is configured such that the bottom portion 216 of the viscous fluid-filled damper 206 is fixed to the bottom portion 208 of the support frame 202 by a fixing screw 224 in a state where the peripheral wall portion 214 is fitted into the mounting hole 222 of the bottom portion 208 of the support frame 202. It is designed to be fixed.

  The stirring unit 218 has a cylindrical shape with a bottom and has an insertion hole 226 on the inside, and a metal shaft body fixed in advance by being fixed to a mechanical deck made of a metal plate of the main body mechanism unit 200. By inserting 212, the viscous fluid-filled damper 206 is connected to the main body mechanism unit 200.

  In the case of this viscous fluid-filled damper 206, when vibration is applied to the support frame 202, the agitating portion 218 and the shaft body 212 are relatively displaced within the highly viscous viscous fluid L, whereby the viscous fluid L is viscously flowed and energy is lost. Absorbs (absorbs vibration) and blocks or suppresses vibration transmission from the support frame 202 to the main body mechanism unit 200.

  However, in the case of this viscous fluid-filled damper 206, when attaching (connecting) to the main body mechanism unit 200, a metal shaft 212 is caulked and fixed to the main body mechanism unit 200 in advance, and this is stirred by the stirring unit 218. When the shaft body 212 is inserted against the frictional resistance of the inner surface of the insertion hole 226, the flexible film 220 and the cylindrical stirring portion 218 are soft at that time. Therefore, there is a problem that it is difficult to attach the viscous fluid-filled damper 206 to the main body mechanism unit 200, which makes the installation work troublesome.

  In order to solve such a problem, conventionally, a rigid resin mounting shaft portion is integrally formed with the stirring portion, and a portion protruding outside the mounting shaft portion is fixed and attached to the mechanical deck. A damper is proposed and disclosed in US Pat.

FIG. 14 shows a specific example thereof.
In the viscous fluid-filled damper 206 shown in the figure, reference numeral 228 denotes a mounting shaft portion made of a hard resin, and most of it (the embedded portion 230) is embedded in the embedded hole 232 inside the stirring portion 218. The stirrer 218 is integrally formed by two-color molding.

The portion of the attachment shaft portion 228 that protrudes to the outside serves as an attachment portion 234 to the mechanical deck 244 made of a metal plate of the main body mechanism unit 200.
Here, the mounting portion 234 protrudes in a direction perpendicular to the axis from a fitting shaft portion 238 that fits into a through-mounting hole 236 formed in the mechanical deck 244 in an internally fitted state, and one end on the tip side of the fitting shaft portion 238. A first sandwiching portion 240 composed of a large-diameter flange portion and a second sandwiching portion 242 composed of a large-diameter flange portion projecting in a direction perpendicular to the axis from one end on the proximal end side of the fitting shaft portion 238 are provided.

  On the other hand, the mounting hole 236 of the mechanical deck 244 has an opening 246 for allowing a part of the circumferential direction to pass through the fitting shaft portion 238. Further, the mechanical deck 244 has a large diameter following the opening 246. An insertion hole 248 is formed.

  In this viscous fluid-filled damper 206, the mounting portion 234 is inserted upward into the insertion hole 248 of the mechanical deck 244 from the lower side in the figure, and then the fitting shaft portion 238 passes through the opening 246 and is attached to the mounting hole. By fitting the 236 into the internal fitting state, the attachment portion 234, that is, the attachment shaft portion 228 can be attached and fixed to the mechanical deck 244 so that the mechanical deck 244 is sandwiched from both the upper and lower sides by the pair of sandwiching portions 240 and 242.

  However, in this viscous fluid-filled damper 206, the mounting portion of the mounting shaft portion 228 to the mechanical deck 244 is a fitting between hard members of a hard resin and a metal plate. Even if it can be made, the hard resin mounting portion 234, in particular, the fitting shaft portion 238 is worn and worn due to repeated intense vibration as the vehicle travels, as shown in FIG. As described above, there is a problem in that the mounting hole 236 of the mechanical deck 244 is rattled.

  Thus, when rattling occurs between the mounting shaft portion 228 and the mechanical deck 244, vibration applied from the outside is partially absorbed in the gap where the rattling occurs, and as a result, the mounting shaft portion 228. In addition, the integral displacement of the stirring unit 218 with the mechanical deck 244 is impaired, which causes a problem that the damping characteristic of the viscous fluid-filled damper 206 is lowered.

  In addition, in the viscous fluid-filled damper 206 shown in FIG. 14, a strong force is required when attaching the attachment portion 234 of the attachment shaft portion 228 to the attachment hole 236 of the mechanical deck 244. There is a problem that deteriorates the mountability.

As an example in which a rigid resin mounting shaft 228 is integrally formed with the stirring portion 218, a viscous fluid-filled damper 206 as shown in FIG.
In the viscous fluid-filled damper 206 shown in FIG. 16, a screw insertion hole 252 and a positioning hole 254 are provided in the mounting portion 250 formed on the protruding portion to the outside of the mounting shaft portion 228 made of hard resin. Then, with the positioning protrusion 258 of the fixing portion 256 provided on the mechanical deck 244 side being inserted into the positioning hole 254 and positioned, the fixing screw 260 is inserted into the screw insertion hole 252 and the female screw hole 262 of the fixing portion 256 is inserted. The mounting portion 250 is fixedly mounted on the mechanical deck 244 by screwing.

  In the case of the viscous fluid-filled damper 206 shown in FIG. 16, unlike the one shown in FIG. 14, there is no problem that the mounting portion 250 wears due to repeated intense vibrations and gradually becomes loose. A fixing portion 256 must be provided on the mechanical deck 244 side for mounting.

  However, there is a case where such a fixing portion 256 cannot be provided on the mechanical deck 244 side due to space restrictions. In such a case, the viscous fluid-filled damper 206 shown in FIG. There is a problem that it cannot be installed.

JP 2003-139188 A JP 2006-275217 A

  The present invention is based on the above circumstances, so that it can be easily mounted on a mechanical deck, and even when repeated severe vibrations are applied, the mounting shaft unit formed integrally with the stirring unit is worn and rattled. It is an object of the present invention to provide a viscous fluid-filled damper that can be satisfactorily prevented, and does not cause a decrease in damping characteristics due to rattling, and a vibration-proof support device using the same.

  Thus, the first aspect of the present invention relates to a viscous fluid-filled damper, which is interposed between a main body mechanism unit and a support frame of a disc player in which a mechanism unit is incorporated in a mechanical deck, and from the support frame to the main body mechanism unit. A vibration attenuating member that suppresses transmission of vibration to the substrate, (a) a cylindrical peripheral wall portion, (b) a bottom portion provided in a state in which one end of the peripheral wall portion in the axial direction is closed, and (c) the A thin flexible film continuously provided on the peripheral wall at one end of the peripheral wall opposite to the bottom; and (d) provided at the center of the flexible film so as to protrude toward the bottom. A stirring portion that closes one end of the peripheral wall portion opposite to the bottom portion together with the flexible membrane; and (e) a portion integrally formed with the stirring portion and projecting to the outside at a mounting hole with respect to the mechanical deck. And a mounting shaft portion that is fixedly mounted. In a viscous fluid-filled damper integrated with a mounting shaft portion in which a viscous fluid such as silicon oil is enclosed and absorbs vibration based on the stirring action of the stirring portion with respect to the viscous fluid, the stirring portion is a cylinder with a bottom. The mounting shaft portion is integrally formed with the stirring portion so as to be embedded in the embedded hole, and protrudes from the stirring portion to the outside. A core portion made of a hard resin that is inserted through the core portion, and is attached to the outer surface of the core portion at an attachment portion to the mechanical deck, and is interposed between the core portion and the mechanical deck, and is attached to the mechanical deck. On the other hand, an elastic soft portion that elastically contacts in a close contact state is included.

  According to a second aspect of the present invention, in the first aspect of the present invention, the shape of the mounting portion of the mounting shaft portion to the mechanical deck is fitted into the mounting hole in a fitting state, and the fitting shaft portion A first holding portion protruding in a direction perpendicular to the axis from one end on the distal end side, and a second holding portion protruding in a direction perpendicular to the axis from one end on the proximal end side of the fitting shaft portion, and the fitting shaft portion The mechanical deck is sandwiched between the first sandwiching portion and the second sandwiching portion in a state of being fitted in the mounting hole, and the fitting shaft portion is configured to have the core portion and the core portion at the center. And the soft portion fixed to the outer peripheral surface of the mounting hole, and the soft portion is elastically brought into close contact with the inner peripheral surface of the mounting hole.

  According to a third aspect of the present invention, in the second aspect of the present invention, a part of the mounting hole along the circumferential direction is an opening that allows the fitting shaft portion to pass through the mounting hole in a direction perpendicular to the axis. The fitting shaft portion is characterized in that an outer diameter of the core portion at the center is smaller than a width of the opening, and an outer diameter including the soft portion is larger than a width of the opening.

  According to a fourth aspect of the present invention, in the first aspect of the present invention, the shape of the mounting portion of the mounting shaft portion to the mechanical deck is fitted to the mounting hole so as to be fitted in the mounting hole, and the fitting shaft portion A first holding portion protruding in a direction perpendicular to the axis from one end on the distal end side, and a second holding portion protruding in a direction perpendicular to the axis from one end on the proximal end side of the fitting shaft portion, and the fitting shaft portion The mechanical deck is sandwiched between the first sandwiching portion and the second sandwiching portion in a state of being fitted in the mounting hole, and the mechanical deck of one or both of the first sandwiching portion and the second sandwiching portion is formed. A portion on the side in contact with the plate surface is constituted by the soft portion, and the soft portion is elastically brought into close contact with the plate surface of the mechanical deck.

  According to a fifth aspect of the present invention, in any one of the first to fourth aspects, the soft portion is formed of the same material as the flexible membrane and is integrally formed with the flexible membrane in a form continuous to the flexible membrane. It is characterized by that.

  According to a sixth aspect of the present invention, in any one of the first to fifth aspects, the soft portion is in close contact with the mechanical deck in an elastically compressed state.

  A seventh aspect of the present invention relates to an anti-vibration support device, wherein (a) a support frame as a support for a rear unit of a main unit in which a mechanism unit is incorporated in a mechanical deck, and (b) An elastic member interposed between the main body mechanism unit and elastically supporting the load of the main body mechanism unit, and (c) any one of claims 1 to 6 interposed between the main body mechanism unit and the support frame. A viscous fluid-filled damper as described above.

Effects and effects of the invention

  As described above, according to the present invention, in the viscous fluid-filled damper formed by integrally forming the mounting shaft portion in the stirring portion, the mounting shaft portion is integrally formed in the stirring portion so as to be embedded in the embedding hole of the stirring portion. The core part made of hard resin that protrudes to the outside and passes through the mounting hole of the mechanical deck, and is fixed to the outer surface of the core part at the mounting part to the mechanical deck, and is interposed between the core part and the mechanical deck And a soft portion that is elastically brought into close contact with the mechanical deck.

  In the viscous fluid-filled damper of the present invention, the viscous fluid-filled damper can be attached and fixed to the mechanical deck simply by providing a mounting hole on the mechanical deck side, which can reduce the machining cost of the mechanical deck. it can.

In addition, in the viscous fluid-filled damper of the present invention, the mounting shaft portion is not composed of only a hard resin unlike the one shown in FIG. 14, and the stirring shaft portion is a core of the center portion made of hard resin. And a soft portion having elasticity that is fixedly attached to the outer surface of the core portion, and the mounting portion of the stirring shaft portion is in contact with the mechanical deck in a state where the soft portion is in elastic contact with the mechanical deck. Therefore, even when severe vibration is repeatedly applied, it is possible to effectively prevent the hard resin core portion from being worn by rubbing against the mechanical deck.
This is because vibration applied from the outside can be absorbed by elastic deformation of the soft part.

Thus, by preventing the core portion from being worn, it is possible to prevent the mounting portion at the mounting shaft portion from rattling with respect to the mechanical deck, and accordingly, the damping characteristic of the viscous fluid-filled damper is reduced by the backlash. Can be satisfactorily prevented.
In addition, since the soft part which contacts a mechanical deck directly can absorb the relative displacement of an attachment part and a mechanical deck by the elasticity which it has, it can prevent that a soft part itself wears by rubbing.

  Further, in the viscous fluid-filled damper of the present invention, the attachment portion can be attached to the attachment hole of the mechanical deck by elastically deforming the soft portion, so that the attachment portion can be easily attached to the mechanical deck with a small force. In addition, the mounting property can be further improved as compared with the conventional case.

  According to the present invention, the shape of the attachment portion to the mechanical deck in the attachment shaft portion according to claim 2 is set in a direction perpendicular to the axis from the fitting shaft portion fitted into the attachment hole of the mechanical deck in an internally fitted state. The first sandwiching portion and the second sandwiching portion projecting in a direction perpendicular to the axis from one end on the base end side and the fitting shaft portion fitted in the mounting hole. 2 The sandwiching part is shaped to sandwich the mechanical deck, and the fitting shaft part is composed of a core part in the center part and a soft part fixed to the outer peripheral surface of the core part, and the soft part is attached to the mounting hole. It can be made to make it contact elastically with the inner peripheral surface of this.

  By doing so, it is possible to prevent rubbing due to direct contact between the core portion made of the hard resin and the inner peripheral surface of the mounting hole, and the fitting shaft portion is worn and there is a backlash between the inner peripheral surface of the mounting hole. This can be prevented well.

  According to the present invention, a part of the mounting hole in the circumferential direction is formed as an opening according to the third aspect, and the fitting shaft portion is slid in the mounting hole through the opening in the direction perpendicular to the axis. The outer diameter of the central core portion can be made smaller than the width of the opening, and the outer diameter including the soft portion can be made larger than the width of the opening.

  In such a case, when the fitting shaft portion is slid in the mounting hole in the direction perpendicular to the axis through the opening, the core portion made of hard resin is smaller than the opening, so that the soft portion is elastically deformed. However, the fitting shaft portion can be easily slid into the attachment hole through the opening with a weak force, and can be brought into the fitting state.

According to the present invention, the portion of the first sandwiching portion and the second sandwiching portion on the side contacting the plate surface of one or both of the mechanical decks can be constituted by the soft portion.
In this case, it is possible to satisfactorily prevent one or both of the first sandwiching portion and the second sandwiching portion from being worn by rubbing with the mechanical deck.

In the present invention, it is desirable to provide the soft part over the entire circumference of the core part, but in some cases, it is also possible to provide the soft part partially in the circumferential direction.
It is also possible to configure the soft part separately from the flexible film. However, according to claim 5, the soft part is made of the same material as the flexible film and is flexible in a form continuous to the flexible film. It is desirable to form it integrally with the membrane (claim 5).
If it does in this way, there will be no especially high manufacturing cost by providing a soft part, and the advantage that a viscous fluid enclosure damper can be manufactured cheaply will be acquired.

In the present invention, the soft portion can be kept in close contact with the mechanical deck in an elastically compressed state with the mounting portion of the mounting shaft portion being attached to the mechanical deck.
By doing in this way, the vibration from the outside can be absorbed more effectively in the soft part.

  Claim 7 relates to an anti-vibration support device for a disc player. This anti-vibration support device uses the above-described damper as a viscous fluid-filled damper, so that it can be easily assembled to a mechanical deck, and after assembly, the viscous fluid It is possible to prevent the vibration-proof characteristic from deteriorating due to the occurrence of rattling between the enclosed damper and the mechanical deck.

Next, embodiments of the present invention will be described in detail with reference to the drawings.
In FIG. 1, 10 is a disc player such as a CD player (in this case, an in-vehicle disc player), and 12 is a turntable on which a disc is rotated, its rotation drive unit, and a laser beam is irradiated onto the surface of the disc. An optical reading unit that receives reflected light (returned light) by a light receiving element and reads information recorded on a disk, and a mechanism unit such as a guide unit that moves and guides the optical reading unit on a mechanical deck 14 It is.
Reference numeral 16 denotes an anti-vibration support device that supports the main body mechanism unit 12 in an anti-vibration manner, and includes a support frame 18 as a support for the main body mechanism unit 12.
The support frame 18 has a box shape as a whole, and accommodates the main body mechanism unit 12 therein.

  Reference numeral 20 denotes a metal spring (elastic member) that is interposed between the support frame 18 and the main body mechanism unit 12 so as to connect them, and elastically supports the load of the main body mechanism unit 12. Thus, the main body mechanism unit 12 is suspended in a floating state and elastically.

22 is interposed between the support frame 18 (here, the bottom 24 thereof) and the main body mechanism unit 12 at a plurality of locations, and is filled with a viscous fluid that dampens vibration between the support frame 18 and the main body mechanism unit 12. It is a damper.
The anti-vibration support device 16 includes a support frame 18, a spring 20, and a viscous fluid-filled damper 22.

FIG. 2 specifically shows the configuration of the viscous fluid-filled damper 22 in the present embodiment.
As shown in FIG. 2B, the viscous fluid-filled damper 22 includes a cylindrical peripheral wall portion 26, a bottom portion 28 that closes one end in the axial direction (the lower end in the figure), and a bottom portion 28 of the peripheral wall portion 26. Is a thin flexible film 30 provided continuously at one end (upper end in the figure) of the peripheral wall 26 at the opposite end, and provided at the center of the flexible film 30, and together with the flexible film 30, the bottom of the peripheral wall 26. A stirrer 32 that closes one end on the opposite side of 28 has a closed container shape as a whole, and a viscous fluid L such as silicone oil is enclosed therein.

The viscous fluid-filled damper 22 moves relative to the inside of the viscous fluid L together with the core portion 44 of the mounting shaft portion 34, which will be described later, and the stirring frame 32 and the support frame 18 based on the stirring action on the viscous fluid L at that time. It absorbs vibrations with the main body mechanism unit 12.
Here, the viscous fluid L has a kinematic viscosity of 5000 centistokes (cSt) or more, and preferably has a high viscosity of about 50000 centistokes.

  In the viscous fluid-filled damper 22 of this embodiment, the bottom portion 28 has a fixing portion 36 extending in a direction perpendicular to the axis from the peripheral wall portion 26, and a fixing hole 38 is formed therein, as shown in FIG. The fixing hole 38 is fixed to the bottom 24 of the support frame 18 by a fixing screw.

A flange portion 40 is formed at the lower end portion of the peripheral wall portion 26 in the figure, and the lower end portion of the peripheral wall portion 26 including the flange portion 40 is a shallow recess in the bottom portion 28 formed separately from the peripheral wall portion 26. The bottom portion 28 and the peripheral wall portion 26 are fixed in this state.
Here, the bottom portion 28 and the lower end portion of the peripheral wall portion 26 are fixed to each other by, for example, ultrasonic welding or the like.

In this example, the viscous fluid-filled damper 22 has a double wall structure in which the peripheral wall portion 26 includes an outer peripheral wall portion 26a and an inner peripheral wall portion 26b.
The outer peripheral wall portion 26a, the bottom portion 28, and the core portion 44 of the mounting shaft portion 34 are all made of the same hard resin material (for example, polypropylene resin).

On the other hand, the inner peripheral wall portion 26b, the stirring portion 32, and the flexible film 30 are all the same soft resin material (for example, polystyrene-poly (ethylene-butylene) -polystyrene resin or polystyrene-poly (ethylene-propylene) -polystyrene resin). It is constituted integrally.
The outer peripheral wall portion 26a and the inner peripheral wall portion 26b are joined to each other by integral molding at their overlapping surfaces, and the core portion 44 and the stirring portion 32 of the mounting shaft portion 34 are mutually joined by integral molding at their contact surfaces. It is joined.

  In this embodiment, as the hard resin material, a resin having a hardness of 50 or more, preferably a thermoplastic resin (for example, polypropylene resin, polyamide resin, etc.) can be used with a hardness meter of JIS K 6253 type D, and a soft resin material can be used. As a JIS K 6253 type A hardness tester, a resin having a hardness of 80 or less can be used. Here, as the soft resin material, for example, a thermoplastic elastomer made of the above-mentioned polystyrene-poly (ethylene-butylene) -polystyrene resin or polystyrene-poly (ethylene-propylene) -polystyrene resin is used.

The stirring portion 32 has a bottomed cylindrical shape and has an embedded hole 46 formed therein, and is integrally formed with the stirring portion 32 with the core portion 44 made of the hard resin material embedded therein. Yes.
In the figure, reference numeral 48 denotes an embedded portion of the core portion 44 in the embedded hole 46.

Here, the core portion 44 has a cylindrical shape as a whole, and a large-diameter head portion 52 is formed at the upper end portion in the drawing.
The outer periphery of the head 52 protrudes in an annular shape in the direction perpendicular to the axis, and the annular protruding portion forms a flange portion 54. The flange portion 54 has a tapered shape whose outer peripheral surface expands downward in the figure.

In this example, the core part 44 and the outer peripheral wall part 26a, the stirring part 32, the flexible membrane 30, and the inner peripheral wall part 26b are integrally formed by two-color molding.
Specifically, in the mold, first, the core portion 44 and the outer peripheral wall portion 26a are molded by injecting a hard resin material, and then the stirrer 32, the flexible membrane 30 and the like by injecting a soft resin material using a common mold. The inner peripheral wall portion 26b is formed, and at the time of forming, the core portion 44 and the outer peripheral wall portion 26a, the agitating portion 32, the flexible film 30, and the inner peripheral wall portion 26b are integrated with each other at their contact surfaces. Yes.
The bottom portion 28 is fixed to the peripheral wall portion 26 by ultrasonic welding or the like after the viscous fluid L is injected and filled inside the peripheral wall portion 26. At this time, the viscous fluid L is sealed inside. It becomes a state.

In the mounting shaft portion 34, a portion protruding upward from the flexible film 30 in the figure forms a mounting portion 50 to the mechanical deck 14.
As shown also in FIG. 5, the mounting portion 50 has a fitting shaft portion 58 that fits into a fitting hole 56 (see FIG. 3) formed in the mechanical deck 14 in an internally fitted state, and a fitting shaft portion 58. A first clamping part 60 projecting annularly in the direction perpendicular to the axis from one end of the distal end side (upper end side in the figure), and a second clamping part 62 projecting annularly in the direction perpendicular to the axis from one end of the base end side In a state where the fitting shaft portion 58 is fitted in the attachment hole 56, the pair of first holding portions 60 and the second holding portion 62 hold the mechanical deck 14, specifically, the peripheral portion of the attachment hole 56 from both sides. It has a shape.

The attachment portion 50 includes a core portion 44 at the center portion and a soft covering portion 57 made of the same soft resin material and elastic material as the flexible film 30 that covers the outer peripheral surface thereof.
The fitting shaft portion 58 includes a core portion 44 and a coating 64 that covers the outer circumferential surface of the core portion 44 in an annular shape, and the first clamping portion 60 includes a flange portion 54 of the core portion 44 and a flange portion 54 thereof. And a film 65 covering the lower surface of the film.
Further, the second clamping part 62 is formed by a step part 66 formed in the soft covering part 57.
The soft covering portion 57 is formed with the same thickness and the same outer diameter as the stirring portion 32 in the lower portion in the figure from the step portion 66.

As shown in FIG. 3, a part of the mounting hole 56 of the mechanical deck 14 along the circumferential direction has an opening 68 through which the fitting shaft portion 58 passes through the mounting hole 56 in the direction perpendicular to the axis. It is said that.
Further, following the opening 68, the mechanical deck 14 is formed with a circular insertion hole 70 for inserting the mounting portion 50 upward from below in FIG. The diameter of the insertion hole 70 is larger than that of the first clamping part 60 in the attachment shaft part 34.

In this embodiment, as shown in FIG. 4, the mounting shaft portion 34 of the viscous fluid-filled damper 22 is inserted into the insertion hole 70 from below in the drawing of the mechanical deck 14, and the first clamping portion 60 is inserted into the insertion hole 70. The fitting shaft portion 58 is slid in the mounting hole 56 in a direction perpendicular to the shaft through the opening 68, and the fitting shaft portion 58 is fitted into the mounting hole 56 in an internally fitted state.
At this time, the first sandwiching portion 60 and the second sandwiching portion 62 are in a state of sandwiching the mechanical deck 14, specifically, the peripheral portion of the mounting hole 56 from the upper and lower sides as shown in FIGS. Here, the attachment shaft portion 34 is attached and fixed to the mechanical deck 14.

  At this time, the coating 64 of the soft covering portion 57 that covers the outer peripheral surface of the hard resin core portion 44 is interposed between the core portion 44 and the inner peripheral surface of the mounting hole 56 in the fitting shaft portion 58. The coating 64 is elastically brought into close contact with the inner peripheral surface of the mounting hole 56.

Further, the second sandwiching portion 62 formed by the stepped portion 66 of the soft covering portion 57 is in a state of being in elastic contact with the lower surface of the mechanical deck 14 in the drawing, and the coating 65 in the first sandwiching portion 60 is further in contact with the mechanical deck 14. It will be in the state which elastically contacted the upper surface in the figure.
As such, the dimensions of the core portion 44 and the soft covering portion 57 are determined in advance.

Specifically, in FIG. 3, the fitting hole 50 is fitted to the diameter d ₁ = φ2.6 mm, the opening width d ₂ = 2.2 mm of the opening 68, and the plate thickness d ₃ = 0.8 mm of the mechanical deck 14. The outer diameter d ₄ of the core portion 44 of the shaft portion 58 is equal to φ2.1 mm, and the thickness d ₅ of the coating 64 is 0.3 mm (however, 0.05 to 0.05 under the outer diameter d ₄ of the same or different core portion 44 depending on the case) The outer diameter d ₆ = φ2.7 mm of the entire fitting shaft part 58, the groove width d ₇ between the first clamping part 60 and the second clamping part 62 = 0.7 mm, the first The thickness d ₈ of the coating film 65 in the clamping part 60 is set to 0.3 mm.
Further, the outer diameter d ₉ of the first clamping unit 60 is set to φ3.2 mm.

The outer diameter d ₆ = φ2.7 mm of the fitting shaft portion 58 is larger than the diameter d ₁ = φ2.6 mm of the mounting hole 56 of the mechanical deck 14, and the first clamping portion 60 and the second clamping portion 62 are The groove width d ₇ = 0.7 mm is smaller than the thickness d ₃ = 0.8 mm of the mechanical deck 14, so that the coating 64 is attached on one side in the diametrical direction, that is, the thickness is 0.05 mm. A state in which the film 65 is elastically compressed (up to about 0.05 to 0.5 mm), and the film 65 and the second clamping part 62 formed by the soft coating part 57 itself are elastically compressed by 0.1 mm in the axial direction in total. (The compression amount is acceptable up to about 0.05 to 0.5 mm).
That is, the attachment portion 50 is attached to the attachment hole 56 of the mechanical deck 14 in a state where the soft covering portion 57 is elastically compressed in both the radial direction and the axial direction.

  According to the present embodiment as described above, the viscous fluid-filled damper 10 can be attached and fixed to the mechanical deck 14 simply by providing the mounting hole 56 and the insertion hole 70 on the mechanical deck 14 side. Processing costs can be reduced.

In addition, in the viscous fluid-filled damper 22 of the present embodiment, the mounting shaft portion 34 is not made of only hard resin, and is provided in a fixed state on the core portion 44 made of hard resin and its outer surface. And the fitting shaft portion 58 of the attachment portion 50 closely contacts the inner peripheral surface of the attachment hole 56 of the mechanical deck 14 with the fitting shaft portion 58 of the attachment portion 50. Since it is fitted into the mounting hole 56 in a state of elastic contact with the state, the hard resin core 44 is worn by rubbing against the inner peripheral surface of the mounting hole 56 even when severe vibration is repeatedly applied. Can be effectively prevented.
This is because vibration applied from the outside can be absorbed by elastic deformation of the coating 64.

  Further, in the present embodiment, the portions of the first sandwiching portion 60 and the second sandwiching portion 62 that come into contact with the plate surface of the mechanical deck 14 are composed of the soft resin coating 65 and the step portion 66, that is, the soft coating portion 57 itself. Therefore, it is possible to satisfactorily prevent the core portion 44 from being worn by rubbing with the mechanical deck 14 in the first sandwiching portion 60 and the second sandwiching portion 62.

Thus, by preventing the core portion 44 from being worn, it is possible to prevent the mounting portion 50 of the mounting shaft portion 34 from rattling with respect to the mechanical deck 14, and accordingly, the backlash of the viscous fluid-filled damper 22 can be prevented. It is possible to satisfactorily prevent the attenuation characteristics from being deteriorated.
The soft covering portion 57 and the coatings 64 and 65 made of a part thereof that directly contact the mechanical deck 14 can absorb relative displacement with the mechanical deck 14 due to the elasticity of the soft covering portion 57, and can prevent them from being worn by rubbing.

  In addition, in the viscous fluid-filled damper 22 of the present embodiment, the attachment portion 50 can be attached to the attachment hole 56 of the mechanical deck 14 by elastically deforming the coatings 64 and 65 and the soft covering portion 57 itself, so that a small force is required. Thus, the attachment portion 50 can be easily attached to the mechanical deck 14, and the attachment property can be further improved as compared with the conventional case.

In this embodiment, a part of the mounting hole 56 in the circumferential direction is formed as an opening 68, and the fitting shaft portion 58 is slid in the mounting hole 56 through the opening 68 in the direction perpendicular to the axis. The outer diameter d ₄ of the central core portion 44 is smaller than the width of the opening 68, and the outer diameter d ₆ including the coating 64 is larger than the width of the opening 68. Thus, when the fitting shaft portion 58 is slid in the mounting hole 56 through the opening 68 in the direction perpendicular to the axis, the fitting shaft portion 58 can be easily inserted into the attachment hole 56 through the opening 68 while being elastically deformed. It can be made to slide into the mounting hole 56 and fit.

  In the present embodiment, since the soft covering portion 57 is formed of the same material as the flexible membrane 30 and is continuous with the flexible membrane 30 and is integrally formed with the flexible membrane 30, By providing the coatings 64 and 65 made of a part, the manufacturing cost is not particularly increased, and the viscous fluid-filled damper 22 can be manufactured at low cost.

  In the present embodiment, since the soft covering portion 57 and the coatings 64 and 65 are in close contact with the mechanical deck 14 in an elastically compressed state with the mounting portion 50 attached to the mechanical deck 14, vibrations from the outside are applied to them. Can be absorbed efficiently.

  In FIG. 3, the mounting hole 56 and the insertion hole 70 having a larger diameter than this are provided in the mechanical deck 14 in a continuous form, that is, a dharma hole is formed in the mechanical deck 14 as shown in FIG. As shown, the mounting hole 56 is provided in the outer peripheral edge of the mechanical deck 14 so as to open to the outside through the opening 68, and the mounting portion 50 of the viscous fluid-filled damper 22 is mounted and fixed in the same manner as described above. It can also be made.

The form of the attachment part 50 described above is merely an example, and the attachment part 50 can be configured in various other forms.
FIG. 7 shows a specific example thereof.
7A is an example in which the coating 65 in FIGS. 2 and 5 is omitted, and the first clamping portion 60 is formed by the flange portion 54 itself in the core portion 44.
The other points are the same as those shown in FIGS.

On the other hand, the example of FIG. 7B is an example in which a stepped portion 72 is also provided on the core portion 44 side, and the second sandwiching portion 62 is formed by the stepped portion 72 and the stepped portion 66 of the soft covering portion 57. .
The other points are basically the same as those shown in FIGS.

On the other hand, in the example of FIG. 7C, the shape of the core portion 44 is a shape that does not have the large-diameter head 52 shown in FIGS. 2 and 5, that is, a cylindrical shape having a uniform outer diameter over the entire length in the axial direction. This is an example in which a flange portion 74 projecting annularly in the direction perpendicular to the axis is provided at the upper end portion of the soft covering portion 57 and the first clamping portion 60 is formed by the flange portion 74.
The other points are basically the same as those shown in FIGS.
Furthermore, the example of FIG. 7D is an example in which the second holding portion 62 is formed using a part of the flexible film 30.
Other points are basically the same as those shown in FIGS.

8 to 12 show still another embodiment of the present invention.
As shown in FIG. 8, in this embodiment, the shape of the mounting hole 56 of the mechanical deck 14 is a circular hole having a closed shape (closed loop shape) having no opening 68 as described above. The mounting portion 50 has a shape having a groove 76 extending downward in the axial direction from the upper end in the figure. By forming the groove 76, the mounting portion 50 has an elastic deformability in the direction perpendicular to the axis. .
The groove 76 is provided in the core portion 44 made of a hard resin material as shown in FIG.

  In this embodiment, the mounting portion 50 is the same as that of the first embodiment in that the planar shape is a circular shape, but here, as shown in FIG. The first clamping portion 60 that needs to pass through the hole 56 is shaped to be cut flat in the direction perpendicular to the axis at two locations that differ by 180 ° in the circumferential direction. In FIG. 10, reference numeral 78 denotes the flat cut surface.

In this embodiment, as shown in FIG. 10, the mounting portion 50 is elastically deformed and elastically fitted into a mounting hole 56 formed of a circular hole in the mechanical deck 14. The unit 50 is attached to the mechanical deck 14.
Specifically, while elastically deforming the attachment portion 50, the first clamping portion 60 and its upper portion in the figure pass through the attachment hole 56 and protrude upward in the drawing.
And when the 1st clamping part 60 was passed to the upper side in the figure with respect to the attachment hole 56, the whole attachment part 50 restored | restored elastic shape, and the fitting shaft part 58 fits in the attachment hole 56 in an internal fitting state here. At the same time, the first sandwiching portion 60 and the second sandwiching portion 62 are in a state of sandwiching the mechanical deck 14 from both the upper and lower sides, and the mounting portion 50 is attached to the mechanical deck 14 here.

In this embodiment, the dimensional relationship of each part is as follows as an example.
Here, as shown in FIG. 9, the thickness d ₃ of the mechanical deck 14 is 0.8 mm, which is the same as in the above embodiment, but the mounting hole 56 formed of a circular hole has a diameter d ₁ φ = 2. The size is 6 mm.
On the other hand, in the mounting portion 50, the outer diameter d ₄ of the core portion 44 at the fitting shaft portion 58 = 2.1 mm, the outer diameter d _{6 of the} entire fitting shaft portion 58 including the coating 64 = 2.7 mm, and the thickness of the coating 64. Thickness d ₅ = 0.3 mm.
Note that the groove width d ₇ between the first sandwiching portion 60 and the second sandwiching portion 62 is 0.7 mm and the thickness d ₈ of the coating 65 is 0.3 mm, which is the same as described above.

  In this embodiment, in a state where the attachment portion 50 is attached to the mechanical deck 14, the soft covering portion 57 including the coating 65 is elastically compressed by 0.1 mm in the axial direction (vertical direction in the figure), and the coating 64 is also in the radial direction. Elastically compressed.

11 and 12 show another example of the mounting portion 50 shown in FIG.
Among these, the example of FIG. 11A is an example in which the first sandwiching portion 60 is formed by the flange portion 54 itself in the core portion 44 without the coating 65 in the soft covering portion 57.
In the example of FIG. 12B, a second flange portion 80 having a large diameter is provided in the core portion 44, and the second step portion 72 of the flange portion 80 and the step portion 66 of the soft covering portion 57 are used as the second portion. This is an example in which a holding part 62 is formed.
Further, the example of FIG. 12C is an example in which the coating 65 is omitted in the example of FIG. 12B and the first clamping part 60 is formed by the flange part 54 of the core part 44 itself.

In the example of FIG. 12D, the lower part of the step part 72 of the core part 44 is formed with a large diameter as a whole in the example of (B), and the step part of the core part 44 is the same as the example of (B). In this example, the second clamping portion 62 is formed by the step portion 66 of the soft covering portion 57 and the step 72.
Furthermore, the example of FIG. 12E is an example in which the coating 65 is omitted in the example of FIG. 12D and the first clamping part 60 is formed by the flange part 54 of the core part 44 itself.

  Although the embodiments of the present invention have been described in detail above, these are merely examples, and the present invention can be configured in various modifications without departing from the spirit of the present invention.

It is the figure which showed the viscous particle enclosure damper of one Embodiment of this invention with the anti-vibration support apparatus of the disc player. It is the figure which showed the viscous fluid enclosure damper of the embodiment in the single-piece | unit state. It is a figure of the attachment part and attachment hole of the viscous fluid enclosure damper of the embodiment. It is explanatory drawing of the attachment method of the viscous fluid enclosure damper of the embodiment. It is the principal part enlarged view which showed the viscous fluid enclosure damper of the embodiment in the attachment state. It is the figure which showed the other example of the attachment hole. It is the figure which showed the other example of the attachment part of the viscous fluid enclosure damper. It is the figure which showed the viscous fluid enclosure damper of other embodiment of this invention with the attachment hole. It is principal part sectional drawing of FIG. It is explanatory drawing of the attachment method of the viscous fluid enclosure damper of FIG. It is the figure which showed the other example of the attachment part of the viscous fluid enclosure damper of FIG. It is the figure which showed other example of a form. It is the figure which showed an example of the conventional viscous fluid enclosure damper with the peripheral part. It is the figure which showed the thing of an attachment shaft part integrated type as an example different from FIG. 13 of the conventional viscous fluid enclosure damper. It is explanatory drawing of the malfunction of the viscous fluid enclosure damper of FIG. It is the figure which showed another example of the conventional shaft body integrated type viscous fluid enclosure damper.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Disc player 12 Main body mechanism part unit 14 Mechanical deck 16 Anti-vibration support apparatus 18 Support frame 22 Viscous fluid enclosure damper 26 Peripheral wall part 28 Bottom part 30 Flexible film 32 Stirrer part 34 Attachment shaft part 44 Core part 46 Embedded hole 50 Attachment part 56 Mounting hole 57 Soft covering portion 58 Fitting shaft portion 60 First holding portion 62 Second holding portion 64, 65 Film 68 Opening

Claims (7)

A vibration damping member that is interposed between a main body mechanism unit and a support frame of a disc player in which a mechanism unit is incorporated in a mechanical deck, and suppresses vibration transmission from the support frame to the main body mechanism unit. a) a cylindrical peripheral wall portion; (b) a bottom portion provided so as to close one end in the axial direction of the peripheral wall portion; and (c) the peripheral wall portion at one end of the peripheral wall portion opposite to the bottom portion. A thin flexible film provided continuously to the bottom, and (d) provided at the center of the flexible film so as to protrude toward the bottom, and is opposite to the bottom of the peripheral wall together with the flexible film A stirring portion that closes one end of the side, and (e) a mounting shaft portion that is integrally formed with the stirring portion and that is fixed to the mechanical deck at a mounting hole at a portion protruding to the outside. A viscous fluid such as silicone oil is enclosed inside the container in the form of a sealed container. In the viscous fluid-filled damper with an integral mounting shaft that absorbs vibration based on the stirring action of the stirring portion on the viscous fluid, the stirring portion is formed into a cylindrical shape with a bottom and has an embedded hole inside. The core portion of the central portion made of hard resin that is integrally formed with the stirring portion so as to be embedded in the embedding hole, protrudes outside from the stirring portion, and passes through the mounting hole, An elastic soft portion that is fixedly attached to the outer surface of the core portion at the attachment portion to the mechanical deck and is interposed between the core portion and the mechanical deck, and elastically contacts the mechanical deck in close contact with the mechanical deck; A viscous fluid-filled damper, comprising: 2. The shape of the mounting portion of the mounting shaft portion to the mechanical deck according to claim 1, wherein the fitting shaft portion is fitted in the mounting hole in an internally fitted state, and the end of the fitting shaft portion is axially perpendicular to one end. A first sandwiching portion projecting in the direction and a second sandwiching portion projecting in a direction perpendicular to the axis from one end on the proximal end side of the fitting shaft portion, and fitting the fitting shaft portion into the mounting hole. In a state where the mechanical deck is sandwiched between the first sandwiching portion and the second sandwiching portion,
The fitting shaft portion is constituted by the core portion at the center portion and the soft portion fixed to the outer peripheral surface of the core portion, and the soft portion is elastically brought into close contact with the inner peripheral surface of the mounting hole. A viscous fluid-filled damper characterized by being configured as described above.   3. The attachment hole according to claim 2, wherein a part of the attachment hole along a circumferential direction is an opening that allows the fitting shaft portion to pass through the attachment hole in a direction perpendicular to the shaft, and the fitting shaft portion is the center. The viscous fluid-filled damper is characterized in that the outer diameter of the core portion of the portion is smaller than the width of the opening, and the outer diameter including the soft portion is larger than the width of the opening. 2. The shape of the mounting portion of the mounting shaft portion to the mechanical deck according to claim 1, wherein the fitting shaft portion is fitted in the mounting hole in an internally fitted state, and the end of the fitting shaft portion is axially perpendicular to one end. A first sandwiching portion projecting in the direction and a second sandwiching portion projecting in a direction perpendicular to the axis from one end on the proximal end side of the fitting shaft portion, and fitting the fitting shaft portion into the mounting hole. In a state where the mechanical deck is sandwiched between the first sandwiching portion and the second sandwiching portion,
A portion of one or both of the first sandwiching portion and the second sandwiching portion that contacts the plate surface of the mechanical deck is configured by the soft portion, and the soft portion is in close contact with the plate surface of the mechanical deck. A viscous fluid-filled damper, wherein the damper is elastically contacted.   5. The viscous fluid according to claim 1, wherein the soft portion is formed of the same material as the flexible membrane and is integrally formed with the flexible membrane in a form continuous to the flexible membrane. Enclosed damper.   The viscous fluid-filled damper according to claim 1, wherein the soft portion is in close contact with the mechanical deck in an elastically compressed state. (A) a support frame as a support for the rear unit of the main unit, in which the mechanism is incorporated in the mechanical deck;
(B) an elastic member interposed between the main body mechanism unit and the support frame to elastically support the load of the main body mechanism unit;
(C) A vibration-proof support device for a disc player, comprising: the viscous fluid-filled damper according to any one of claims 1 to 6 interposed between the main body mechanism unit and the support frame.

Images