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WO2011122424A1 - Diaphragm - Google Patents

Diaphragm Download PDF

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Publication number
WO2011122424A1
WO2011122424A1 PCT/JP2011/057082 JP2011057082W WO2011122424A1 WO 2011122424 A1 WO2011122424 A1 WO 2011122424A1 JP 2011057082 W JP2011057082 W JP 2011057082W WO 2011122424 A1 WO2011122424 A1 WO 2011122424A1
Authority
WO
WIPO (PCT)
Prior art keywords
housing
outer peripheral
diaphragm
peripheral flange
flange portion
Prior art date
Application number
PCT/JP2011/057082
Other languages
French (fr)
Japanese (ja)
Inventor
修二 竹下
一真 繁田
広治 青葉
Original Assignee
Nok株式会社
株式会社アドヴィックス
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Nok株式会社, 株式会社アドヴィックス filed Critical Nok株式会社
Priority to CN201180016086.1A priority Critical patent/CN102822573B/en
Priority to US13/637,877 priority patent/US20130014639A1/en
Publication of WO2011122424A1 publication Critical patent/WO2011122424A1/en

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16J—PISTONS; CYLINDERS; SEALINGS
    • F16J3/00—Diaphragms; Bellows; Bellows pistons
    • F16J3/02—Diaphragms
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B1/00—Installations or systems with accumulators; Supply reservoir or sump assemblies
    • F15B1/02—Installations or systems with accumulators
    • F15B1/04—Accumulators
    • F15B1/08—Accumulators using a gas cushion; Gas charging devices; Indicators or floats therefor
    • F15B1/10—Accumulators using a gas cushion; Gas charging devices; Indicators or floats therefor with flexible separating means
    • F15B1/12—Accumulators using a gas cushion; Gas charging devices; Indicators or floats therefor with flexible separating means attached at their periphery
    • F15B1/125—Accumulators using a gas cushion; Gas charging devices; Indicators or floats therefor with flexible separating means attached at their periphery characterised by the attachment means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2201/00—Accumulators
    • F15B2201/20—Accumulator cushioning means
    • F15B2201/205—Accumulator cushioning means using gas
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2201/00—Accumulators
    • F15B2201/30—Accumulator separating means
    • F15B2201/315—Accumulator separating means having flexible separating means
    • F15B2201/3151—Accumulator separating means having flexible separating means the flexible separating means being diaphragms or membranes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2201/00—Accumulators
    • F15B2201/30—Accumulator separating means
    • F15B2201/315—Accumulator separating means having flexible separating means
    • F15B2201/3156—Accumulator separating means having flexible separating means characterised by their attachment
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2201/00—Accumulators
    • F15B2201/60—Assembling or methods for making accumulators
    • F15B2201/61—Assembling or methods for making separating means therefor

Definitions

  • the present invention relates to a diaphragm, and more particularly to a diaphragm suitable for use as an accumulator or the like of a vehicle hydraulic control device.
  • a diaphragm 1 made of a rubber-like elastic body which has a membrane portion 2 which is flexibly deformed and an outer peripheral flange portion 3 integrally provided on a peripheral portion of the membrane portion 2.
  • the diaphragm 1 is used, for example, as an accumulator of a hydraulic control device for a vehicle and attached to a pressure chamber 32 in a housing 31. With the action of pressure, the membrane portion 2 is flexibly deformed to change the volume of the pressure chamber 32. , And open and close the vent 33.
  • the diaphragm 1 is mounted by the outer peripheral flange 3 being sandwiched between the upper and lower housings 31A and 31B, and at this time, the membrane 2 is set as an initial movement posture.
  • the one surface 2a is in contact with the flat portion 35 of the housing 31A on the upper and lower sides of the drawing provided with the vent holes 33.
  • the outer peripheral flange portion 3 is largely compressed and deformed when mounted between the pair of housings 31A and 31B.
  • the one surface 2a of the film portion 2 may be separated from the flat portion 35 of the lower housing 31A, and in such a case, the film portion 2 is prevented from rising to be accurate. It is necessary to secure the initial movement attitude.
  • the diaphragm according to claim 1 of the present invention has a membrane portion which is flexibly deformed and an outer peripheral flange portion integrally provided on a peripheral edge portion of the membrane portion, the outer peripheral flange portion In the diaphragm held by being fitted between the pair of first housings and the second housing, the outer peripheral flange portion is one surface in the thickness direction of the diaphragm, and is in close contact with the first housing.
  • the three-dimensional shape is characterized in that a thickness direction space is formed in the thickness direction between the outer peripheral flange portion and the first housing.
  • the diaphragm of the present invention has a membrane portion which is flexibly deformed and an outer peripheral flange portion integrally provided on a peripheral edge portion of the membrane portion, and the outer peripheral flange portion is between the pair of first housing and the second housing
  • the state of having the membrane portion seated in the first housing is an initial movement posture.
  • the membrane part When a differential pressure is generated between the space and the space between the diaphragm and the second housing, the membrane part operates to move away from the first housing, and according to the configuration of claim 1, (1) A space in the thickness direction can be easily formed between the outer peripheral flange portion and the first housing simply by giving a three-dimensional shape to the pressed surface, and the first housing and the second housing of the outer peripheral flange portion can be formed by the space in the thickness direction.
  • the membrane portion Under the influence of the deformation in the state where the diaphragm is mounted between the first housing and the second housing, that is, in the initial movement posture in which the above differential pressure is not generated. Floating from the first housing can be suppressed.
  • the three-dimensional shape is an annular protrusion provided at a radial center of the first pressed surface, the outer periphery
  • the thickness direction air gap is formed radially outward of the annular projection of the first pressed surface.
  • the outer peripheral flange portion is mounted between the first housing and the second housing.
  • the outer diameter of the diaphragm is set between the outer peripheral surface of the outer peripheral flange portion and at least one of the first and second housings so as to form a radial gap in the radial direction of the diaphragm.
  • the radial air gap makes it easier to absorb deformation due to compression from the first housing and the second housing of the outer peripheral flange portion.
  • the outer peripheral flange portion is the other surface in the thickness direction of the diaphragm and the second housing It is characterized in that it has a second pressed surface to be pressed, and a three-dimensional shape including a convex portion or a recessed portion on the second pressed surface.
  • the diaphragm according to any one of the first to fourth aspects can suppress the floating of the membrane portion from the first housing.
  • the present invention has the following effects.
  • the gap in the thickness direction or the radial direction is set around the outer peripheral flange portion, and the escape place of the rubber-like elastic body at the flange deformation is secured.
  • the influence of the deformation is less likely to extend to the film portion on the inner peripheral side. Therefore, it is possible to suppress the occurrence of the floating phenomenon on the film portion, and to ensure the correct initial movement posture.
  • (A) is a half cutting sectional view in the mounting state before, and (B) is a principal part enlarged view of (A). It is a figure which shows the same diaphragm, (A) is a half cutting sectional view in the wearing state, (B) is a principal part enlarged view of (A). It is a figure which shows the diaphragm which concerns on the other Example of this invention, (A) is a half cutting sectional view in the mounting state before, and (B) is a principal part enlarged view of (A).
  • (A) is a half cutting sectional view in the wearing state
  • (B) is a principal part enlarged view of (A).
  • Sectional drawing which shows the mounting state of the diaphragm which concerns on a prior art example It is a figure which shows the diaphragm which concerns on a comparative example,
  • (A) is a half cutting sectional view in the mounting state before
  • mounting is a half cutting sectional view in the mounting state
  • (C) is a half cutting sectional view in a failure generating state
  • the diaphragm 1 according to the embodiment is formed into a disk shape by a predetermined rubber-like elastic body, and the flexible deformable membrane portion 2 and the peripheral portion of the membrane portion 2 It integrally has an annular outer peripheral flange portion (peripheral attachment portion) 3 provided.
  • the diaphragm 1 according to this embodiment is used as an accumulator of a vehicle hydraulic control apparatus that performs ABS control, ESC control, etc., and the outer peripheral flange portion 3 is between the pair of upper and lower housings 31A and 31B in the figure.
  • the pressure chamber 32 (see FIG. 2) in the housings 31A and 31B is mounted.
  • the lower housing 31A in FIG. 1 is provided with a vent 33, and the upper housing 31B is provided with a communication hole 39 communicating with, for example, the hydraulic fluid flow path of the vehicle hydraulic device.
  • the film portion 2 is formed in a flat plate shape having a uniform thickness over the entire surface (except when the thick portion 4 described later is provided), and the vent 33 is provided. It has one surface 2a facing one housing (first housing) 31A and the other surface 2b on the opposite side.
  • the outer peripheral flange portion 3 is set to a thickness larger than the membrane portion 2 and is formed into a substantially rectangular cross section, and one end face in the thickness direction is pressed against the one housing 31A provided with the vent hole 33
  • the other end surface is a pressed surface (second pressed surface) 3b that is pressed by the other housing (second housing) 31B.
  • the first surface 3a to be pressed and the one surface 2a of the film portion 2 are disposed on the same plane to form a flush flat surface.
  • the second pressed surface 3 b protrudes in the thickness direction more than the other surface 2 b of the film portion 2.
  • a recess 5 is formed in the tip surface 4a in the plane center of the membrane part 2.
  • the thick portion 4 provided is integrally molded, and correspondingly, the recess 34 into which the thick portion 4 is fitted is provided at the opening peripheral portion of the vent 33 in one housing 31A.
  • the thick portion 4 and the recess 34 are not essential components, and may not be provided.
  • a flat portion 35 is provided in which one surface 2a of the membrane portion 2 contacts substantially the entire surface.
  • An annular mounting portion 36 (see FIG. 2) for mounting the outer peripheral flange portion 3 of the diaphragm 1 is provided between the pair of housings 31A and 31B. Therefore, an annular step portion 37 is provided on one housing 31A. Is formed to form the outer peripheral wall 36a of the mounting portion 36, and the other housing 31B is provided with an annular stopper portion 38 having a projecting shape, and the inner peripheral wall 36b of the mounting portion 36 is formed.
  • the dimension c (see FIG. 2) in the thickness direction of the mounting portion 36 is set smaller than the dimension d (see FIG. 1) in the thickness direction in the free state of the outer peripheral flange portion 3 (c ⁇ d).
  • the dimension ⁇ e (see FIG. 2) in the width direction (radial direction) of the mounting portion 36 is set larger than the dimension ⁇ f (see FIG. 1) in the width direction in the free state of the outer peripheral flange portion 3 ( ⁇ e> ⁇ f) .
  • the gap g (see FIG. 2) between the flat portion 35 of one housing 31A and the stopper portion 38 of the other housing 31B is the same as the thickness dimension h (see FIG. 1) of the membrane portion 2 or It is set to be slightly larger than the thickness dimension h (g ⁇ h).
  • the film portion 2 is in contact with the flat surface portion 35 of the one housing 31A with the one surface 2a as shown in FIG. Becomes an initial movement posture, and pressure is applied to the diaphragm 1 in the initial movement posture, so that the film portion 2 is separated from the flat portion 35 of the housing 31A.
  • the outer peripheral flange portion 3 is compressed and deformed when mounted between the housings 31A and 31B as shown in FIG. 1 to FIG. 2, but even if the outer peripheral flange portion 3 is compressed and deformed in this manner, the membrane portion 2 Is supposed to be in contact with the flat portion 35 of the housing 31A.
  • the membrane portion 2 is already in the housing 31A in the initial posture where the outer peripheral flange portion 3 is attached to the housings 31A and 31B. In this case, it is necessary to take measures against such a case, because it may float away from the flat portion 35.
  • the first pressed surface 3a of the outer peripheral flange portion 3 is provided with a three-dimensional shape 7 on a plane, and this three-dimensional shape 7 is shown in FIG.
  • the outer peripheral flange portion 3 is mounted between the housings 31A and 31B and compressed and deformed, the outer peripheral flange portion is suppressed to suppress the occurrence of the floating phenomenon on the film portion 2 due to the deformation of the outer peripheral flange portion 3.
  • a thickness direction air gap 8 (shown in FIG. 2), which is a clearance space at the time of flange deformation, is set between 3 and one of the housings 31A.
  • the outer peripheral flange portion 3 when the outer peripheral flange portion 3 is mounted between the housings 31A and 31B, the outer peripheral flange portion 3 has a radial gap between the outer peripheral surface 3c of the outer peripheral flange portion 3 and the outer peripheral wall 36a of the housing mounting portion 36. It is set to the outside diameter size which can form 10 (shown in FIG. 2).
  • a protrusion (not shown) may be provided on a part of the outer peripheral surface 3 c of the outer peripheral flange portion 3 and the protrusion may be in contact with the outer peripheral wall 36 a of the housing mounting portion 36.
  • the second pressed surface 3b of the outer peripheral flange portion 3 may be a flat surface
  • the second pressed surface 3b is also provided with a three-dimensional shape 11 of a part on a plane, Specifically, this three-dimensional shape 11 is provided as a projection 12 at the center in the radial direction of the second pressed surface 3b, and by providing such a projection 12, as shown in FIG.
  • a thickness direction air gap 13 is set between the second pressed surface 3 b of the outer peripheral flange portion 3 and the bottom surface 36 d on the opposite side of the housing mounting portion 36 on the outer peripheral side.
  • the projection 12 is formed in an arc shape in a cross section taken along a plane including the central axis of the diaphragm 1 shown in FIG. 1 and has a second pressed surface 3b
  • the plan view shape is not limited to an annular shape, and if there is no problem with the sealability, the plurality of projections are not arranged in a circle, but are circumferentially arranged. It may be a structure.
  • a radial gap 10 is formed between the outer peripheral surface 3 c of the outer peripheral flange portion 3 and the outer peripheral wall 36 a of the housing mounting portion 36.
  • the radial air gap 10 absorbs a part of elastic deformation of the outer peripheral flange portion 3 due to vertical compression shown in FIGS. doing. Together with the thickness direction air gap 8, the air gap that absorbs the elastic deformation of the outer peripheral flange portion 3 can be further enlarged, and the occurrence of the floating of the film portion 2 can be more easily suppressed.
  • the gap that absorbs the elastic deformation of the outer peripheral flange portion 3 can be further enlarged, and the occurrence of the floating of the film portion 2 can be further easily suppressed.
  • the thickness direction air gap 13 may be formed not only on the outer peripheral side of the projection 12 but also on the inner peripheral side.
  • a plurality of convex portions such as the projections 9 and 12 having the three-dimensional shapes 7 and 11 may be provided in parallel to the first pressed surface 3a or the second pressed surface 3b of the outer peripheral flange portion 3, respectively.
  • the gaps 8, 13 in the thickness direction are provided between the protrusions 9, 12 as a relief for the rubber-like elastic material.
  • the three-dimensional shapes 7 and 11 may be recesses instead of the projections 9 and 12, etc.
  • the first pressed surface 3a or the second pressed surface 3b of the outer peripheral flange portion 3 In the state of being in direct contact with and pressed against the bottom surfaces 36c and 36d of the housing mounting portion 36, the air gaps 8 and 13 serving as escape areas of the rubber-like elastic body are between the outer peripheral flange 3 and the bottom surfaces 36c and 36d of the housing mounting portion 36. It is set. A plurality of recesses may also be provided in parallel.
  • the upper three-dimensional shape 11 provided on the second pressed surface 3b of the upper and lower three-dimensional shapes 7 and 11 is formed by the groove-shaped recess 14.
  • Each of the air gaps 8, 10 and 13 acts as a relief for the rubber-like elastic body when the outer peripheral flange portion 3 is compressed and deformed while being sandwiched between the housings 31A and 31B.
  • a part or the whole may disappear (the rubber-like elastic material is filled and it does not exist as a space).

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Diaphragms And Bellows (AREA)
  • Braking Systems And Boosters (AREA)
  • Fluid-Damping Devices (AREA)

Abstract

Disclosed is a diaphragm having a flexible film portion and an outer peripheral flange portion integrally provided on the peripheral edge of the film portion, said outer peripheral flange portion being provided between and held by a first housing and a second housing, wherein the film portion is prevented from rising upward when the diaphragm is attached to the housings. The outer peripheral flange portion has a first pressed surface which is one surface of the diaphragm in the thickness direction and which is in close contact with the first housing, and a three-dimensional shape composed of a projected portion or a recessed portion, on the first pressed surface. When the outer peripheral flange portion is attached to the first housing and the second housing while being compressed and deformed therebetween, the three-dimensional shape defines voids in the thickness direction between the outer peripheral flange portion and the first housing.

Description

ダイアフラムDiaphragm
　本発明は、ダイアフラムに係り、更に詳しくは、車両用液圧制御装置のアキュムレータなどに用いられるのに好適なダイアフラムに関する。 The present invention relates to a diaphragm, and more particularly to a diaphragm suitable for use as an accumulator or the like of a vehicle hydraulic control device.
　従来から図５に示すように、可撓変形する膜部２と、この膜部２の周縁部に一体に設けられた外周フランジ部３とを有するゴム状弾性体製のダイアフラム１が知られており、このダイアフラム１は例えば車両用液圧制御装置のアキュムレータに用いられてハウジング３１内の圧力室３２に装着され、圧力の作用に伴って膜部２が可撓変形し、圧力室３２の容積を変化させるとともに、通気孔３３を開閉する。 Conventionally, as shown in FIG. 5, a diaphragm 1 made of a rubber-like elastic body is known which has a membrane portion 2 which is flexibly deformed and an outer peripheral flange portion 3 integrally provided on a peripheral portion of the membrane portion 2. The diaphragm 1 is used, for example, as an accumulator of a hydraulic control device for a vehicle and attached to a pressure chamber 32 in a housing 31. With the action of pressure, the membrane portion 2 is flexibly deformed to change the volume of the pressure chamber 32. , And open and close the vent 33.
　上記概要のダイアフラム１において昨今、図６（Ａ）に示すように膜部２の厚み方向の一面２ａと外周フランジ部３の厚み方向の一端面３ａとが同一平面上に配置されたタイプのダイアフラムが開発されており、このダイアフラム１は図６（Ｂ）に示すように外周フランジ部３が上下一対のハウジング３１Ａ，３１Ｂ間に挟まれることによって装着され、このとき膜部２は初動姿勢としてその一面２ａが、上記通気孔３３を設けた図上下側のハウジング３１Ａの平面部３５に接触する状態とされる。 Recently, as shown in FIG. 6A, in the diaphragm 1 of the above outline, a diaphragm of a type in which one surface 2a in the thickness direction of the film portion 2 and one end surface 3a in the thickness direction of the outer peripheral flange portion 3 are disposed on the same plane. As shown in FIG. 6 (B), the diaphragm 1 is mounted by the outer peripheral flange 3 being sandwiched between the upper and lower housings 31A and 31B, and at this time, the membrane 2 is set as an initial movement posture. The one surface 2a is in contact with the flat portion 35 of the housing 31A on the upper and lower sides of the drawing provided with the vent holes 33.
　しかしながらこの図６（Ａ）（Ｂ）のダイアフラム１によると、上記外周フランジ部３が一対のハウジング３１Ａ，３１Ｂ間に装着されたときに大きく圧縮変形せしめられることから、その影響を受けて図６（Ｃ）に示すように膜部２の一面２ａが下側のハウジング３１Ａの平面部３５から離れて浮き上がってしまうことがあり、このような場合には膜部２の浮き上がりを抑制して正確な初動姿勢を確保する必要がある。 However, according to the diaphragm 1 of FIGS. 6 (A) and 6 (B), the outer peripheral flange portion 3 is largely compressed and deformed when mounted between the pair of housings 31A and 31B. As shown in (C), the one surface 2a of the film portion 2 may be separated from the flat portion 35 of the lower housing 31A, and in such a case, the film portion 2 is prevented from rising to be accurate. It is necessary to secure the initial movement attitude.
特開２００７－２６９２９８号公報（図１８）JP 2007-269298 A (FIG. 18)
　本発明は以上の点に鑑みて、ダイアフラムをハウジングに装着したときに膜部に浮き上がり現象が発生するのを抑制することができるダイアフラムを提供することを目的とする。 SUMMARY OF THE INVENTION In view of the foregoing, it is an object of the present invention to provide a diaphragm capable of suppressing the occurrence of a floating phenomenon on a film portion when the diaphragm is attached to a housing.
　上記目的を達成するため、本発明の請求項１によるダイアフラムは、可撓変形する膜部と、該膜部の周縁部に一体に設けられた外周フランジ部とを有し、該外周フランジ部が一対の第１ハウジングと第２ハウジングとの間に挟持されて装着されるダイアフラムにおいて、前記外周フランジ部は、前記ダイアフラムの厚み方向における一方の面であり、前記第１ハウジングに対して密着する第１被押圧面と、該第１被押圧面に凸部または凹部よりなる立体形状とを有し、前記外周フランジ部が前記第１ハウジングと第２ハウジングとの間で圧縮変形されて装着された状態で、前記立体形状は前記外周フランジ部と前記第１ハウジングとの間に前記厚み方向に厚み方向空隙を形成することを特徴とする。 In order to achieve the above object, the diaphragm according to claim 1 of the present invention has a membrane portion which is flexibly deformed and an outer peripheral flange portion integrally provided on a peripheral edge portion of the membrane portion, the outer peripheral flange portion In the diaphragm held by being fitted between the pair of first housings and the second housing, the outer peripheral flange portion is one surface in the thickness direction of the diaphragm, and is in close contact with the first housing. 1) A pressed surface, and a solid shape having a convex portion or a recessed portion on the first pressed surface, and the outer peripheral flange portion is mounted by being compressed and deformed between the first housing and the second housing In the state, the three-dimensional shape is characterized in that a thickness direction space is formed in the thickness direction between the outer peripheral flange portion and the first housing.
　本発明のダイアフラムは、可撓変形する膜部と、この膜部の周縁部に一体に設けられた外周フランジ部とを有し、外周フランジ部が一対の第１ハウジングと第２ハウジングとの間に挟持されて装着され、例えば、車両用液圧制御装置のアキュムレータなどで使用される場合には、膜部が第１ハウジングに着座した状態を初動姿勢とし、第１ハウジングとダイアフラムとの間の空間と、ダイアフラムと第２ハウジングとの間の空間と、の間に差圧が生じると、膜部が第１ハウジングから離れるように作動するものであり、請求項１の構成によれば、第１被押圧面に立体形状を持たせるだけで容易に外周フランジ部と第１ハウジングとの間に厚み方向空隙を形成することができ、厚み方向空隙により外周フランジ部の第１ハウジングおよび第２ハウジングからの圧縮による変形を吸収することで、ダイアフラムが第１ハウジングと第２ハウジングとの間に装着された状態、すなわち上記の差圧が生じていない初動姿勢において、上記変形の影響による膜部の第１ハウジングからの浮き上がりを抑制することができる。 The diaphragm of the present invention has a membrane portion which is flexibly deformed and an outer peripheral flange portion integrally provided on a peripheral edge portion of the membrane portion, and the outer peripheral flange portion is between the pair of first housing and the second housing In the case where the membrane portion is seated on the first housing, for example, when used as an accumulator of a fluid pressure control device for a vehicle, the state of having the membrane portion seated in the first housing is an initial movement posture. When a differential pressure is generated between the space and the space between the diaphragm and the second housing, the membrane part operates to move away from the first housing, and according to the configuration of claim 1, (1) A space in the thickness direction can be easily formed between the outer peripheral flange portion and the first housing simply by giving a three-dimensional shape to the pressed surface, and the first housing and the second housing of the outer peripheral flange portion can be formed by the space in the thickness direction. By absorbing the deformation due to the compression from the housing, the membrane portion under the influence of the deformation in the state where the diaphragm is mounted between the first housing and the second housing, that is, in the initial movement posture in which the above differential pressure is not generated. Floating from the first housing can be suppressed.
　また、本発明の請求項２によるダイアフラムは、上記した請求項１に記載のダイアフラムにおいて、前記立体形状は、前記第１被押圧面の径方向中央部に設けられた環状突起であり、前記外周フランジ部が前記第１ハウジングと第２ハウジングとの間で圧縮変形されて装着された状態で、前記厚み方向空隙を前記第１被押圧面の前記環状突起より径方向外側に形成することを特徴とする。 In the diaphragm according to claim 2 of the present invention, in the diaphragm according to claim 1 described above, the three-dimensional shape is an annular protrusion provided at a radial center of the first pressed surface, the outer periphery In the state where the flange portion is mounted by being compressed and deformed between the first housing and the second housing, the thickness direction air gap is formed radially outward of the annular projection of the first pressed surface. I assume.
　請求項２の構成によれば、環状突起により、厚み方向空隙を第１被押圧面の環状突起より径方向外側に形成することで、厚み方向空隙の容積を充分に確保することができ、外周フランジ部の第１ハウジングおよび第２ハウジングからの圧縮による変形をより容易に吸収することができる。 According to the configuration of claim 2, by forming the thickness direction void radially outward of the annular protrusion of the first pressed surface by the annular protrusion, the volume of the thickness direction void can be sufficiently secured. Deformation due to compression from the first housing and the second housing of the flange portion can be more easily absorbed.
　また、本発明の請求項３によるダイアフラムは、上記した請求項１または２に記載のダイアフラムにおいて、前記外周フランジ部は、前記第１ハウジングと第２ハウジングとの間に装着された状態で、当該外周フランジ部の外周面と前記第１および第２ハウジングの少なくとも一つとの間に前記ダイアフラムの径方向において径方向空隙を形成可能な外径寸法に設定されていることを特徴とする。 In the diaphragm according to claim 3 of the present invention, in the diaphragm according to claim 1 or 2, the outer peripheral flange portion is mounted between the first housing and the second housing. The outer diameter of the diaphragm is set between the outer peripheral surface of the outer peripheral flange portion and at least one of the first and second housings so as to form a radial gap in the radial direction of the diaphragm.
　請求項３の構成によれば、径方向空隙により、外周フランジ部の第１ハウジングおよび第２ハウジングからの圧縮による変形の吸収がより容易となる。 According to the configuration of the third aspect, the radial air gap makes it easier to absorb deformation due to compression from the first housing and the second housing of the outer peripheral flange portion.
　また、本発明の請求項４によるダイアフラムは、上記した請求項１ないし３の何れかに記載のダイアフラムにおいて、前記外周フランジ部は、前記ダイアフラムの厚み方向における他方の面であり前記第２ハウジングに押圧される第２被押圧面と、該第２被押圧面に凸部または凹部からなる立体形状とを有することを特徴とする。 In the diaphragm according to a fourth aspect of the present invention, in the diaphragm according to any one of the first to third aspects, the outer peripheral flange portion is the other surface in the thickness direction of the diaphragm and the second housing It is characterized in that it has a second pressed surface to be pressed, and a three-dimensional shape including a convex portion or a recessed portion on the second pressed surface.
　請求項４の構成によれば、第２被押圧面に立体形状を持たせるだけで容易に外周フランジ部と第２ハウジングとの間に厚み方向空隙を形成することができ、厚み方向空隙により外周フランジ部の第１および第２ハウジングからの圧縮による変形の吸収がより容易となる。 According to the configuration of claim 4, it is possible to easily form a gap in the thickness direction between the outer peripheral flange portion and the second housing simply by giving a solid shape to the second pressed surface, and the outer periphery by the gap in the thickness direction It is easier to absorb deformation due to compression from the first and second housings of the flanges.
　更にまた、本発明の請求項５によるダイアフラム支持構造は、第１ハウジングと第２ハウジングとでダイアフラムを挟持してなるダイアフラム支持構造であって、前記ダイアフラムとして請求項１ないし４の何れかに記載のダイアフラムを備えたことを特徴とする。 Furthermore, a diaphragm supporting structure according to a fifth aspect of the present invention is a diaphragm supporting structure in which the first housing and the second housing sandwich the diaphragm, wherein the diaphragm is any one of the first to fourth aspects. It is characterized by having a diaphragm of
　請求項５の構成によれば、ダイアフラム支持構造において、請求項１ないし４の何れかに記載のダイアフラムにより、第１ハウジングからの膜部の浮き上がりを抑制することができる。 According to the fifth aspect of the present invention, in the diaphragm supporting structure, the diaphragm according to any one of the first to fourth aspects can suppress the floating of the membrane portion from the first housing.
　本発明は、以下の効果を奏する。 The present invention has the following effects.
　すなわち、本発明においては上記したように、外周フランジ部の廻りに厚み方向や径方向の空隙が設定されてフランジ変形時のゴム状弾性体の逃げ場が確保されるため、外周フランジ部の変形がこの逃げ場に吸収されて変形の影響がその内周側の膜部にまで及びにくくなる。したがって、膜部に浮き上がり現象が発生するのを抑制し、その正確な初動姿勢を確保することができる。 That is, in the present invention, as described above, the gap in the thickness direction or the radial direction is set around the outer peripheral flange portion, and the escape place of the rubber-like elastic body at the flange deformation is secured. As it is absorbed by the escape area, the influence of the deformation is less likely to extend to the film portion on the inner peripheral side. Therefore, it is possible to suppress the occurrence of the floating phenomenon on the film portion, and to ensure the correct initial movement posture.
本発明の実施例に係るダイアフラムを示す図で、（Ａ）はその装着前状態における半裁断面図、（Ｂ）は（Ａ）の要部拡大図It is a figure which shows the diaphragm which concerns on the Example of this invention, (A) is a half cutting sectional view in the mounting state before, and (B) is a principal part enlarged view of (A). 同ダイアフラムを示す図で、（Ａ）はその装着状態における半裁断面図、（Ｂ）は（Ａ）の要部拡大図It is a figure which shows the same diaphragm, (A) is a half cutting sectional view in the wearing state, (B) is a principal part enlarged view of (A). 本発明の他の実施例に係るダイアフラムを示す図で、（Ａ）はその装着前状態における半裁断面図、（Ｂ）は（Ａ）の要部拡大図It is a figure which shows the diaphragm which concerns on the other Example of this invention, (A) is a half cutting sectional view in the mounting state before, and (B) is a principal part enlarged view of (A). 同ダイアフラムを示す図で、（Ａ）はその装着状態における半裁断面図、（Ｂ）は（Ａ）の要部拡大図It is a figure which shows the same diaphragm, (A) is a half cutting sectional view in the wearing state, (B) is a principal part enlarged view of (A). 従来例に係るダイアフラムの装着状態を示す断面図Sectional drawing which shows the mounting state of the diaphragm which concerns on a prior art example 比較例に係るダイアフラムを示す図で、（Ａ）はその装着前状態における半裁断面図、（Ｂ）はその装着状態における半裁断面図、（Ｃ）は不具合発生状態における半裁断面図It is a figure which shows the diaphragm which concerns on a comparative example, (A) is a half cutting sectional view in the mounting state before, mounting (B) is a half cutting sectional view in the mounting state, (C) is a half cutting sectional view in a failure generating state
　つぎに本発明の実施例を図面にしたがって説明する。 Next, an embodiment of the present invention will be described with reference to the drawings.
　図１および図２に示すように、当該実施例に係るダイアフラム１は、所定のゴム状弾性体によって円盤状に成形され、可撓変形可能な膜部２と、この膜部２の周縁部に設けられた環状の外周フランジ部（外周取付部）３とを一体に有している。また当該実施例に係るダイアフラム１は、ＡＢＳ制御、ＥＳＣ制御などを行なう車両用液圧制御装置のアキュムレータに用いられるものであって、外周フランジ部３が図上上下一対のハウジング３１Ａ，３１Ｂ間に挟まれることによってハウジング３１Ａ，３１Ｂ内の圧力室３２（図２参照）に装着される。図１中の下側のハウジング３１Ａには通気孔３３が設けられ、上側のハウジング３１Ｂには、例えば車両用液圧装置の作動液の流路と連通する連通孔３９が設けられている。 As shown in FIGS. 1 and 2, the diaphragm 1 according to the embodiment is formed into a disk shape by a predetermined rubber-like elastic body, and the flexible deformable membrane portion 2 and the peripheral portion of the membrane portion 2 It integrally has an annular outer peripheral flange portion (peripheral attachment portion) 3 provided. The diaphragm 1 according to this embodiment is used as an accumulator of a vehicle hydraulic control apparatus that performs ABS control, ESC control, etc., and the outer peripheral flange portion 3 is between the pair of upper and lower housings 31A and 31B in the figure. By being pinched, the pressure chamber 32 (see FIG. 2) in the housings 31A and 31B is mounted. The lower housing 31A in FIG. 1 is provided with a vent 33, and the upper housing 31B is provided with a communication hole 39 communicating with, for example, the hydraulic fluid flow path of the vehicle hydraulic device.
　ダイアフラム１の詳細構造として、膜部２は、全面に亙って均一な厚みを有する平板状に成形され（ただし後記する厚肉部４を設ける場合はこれを除く）、通気孔３３を設けた一方のハウジング（第１ハウジング）３１Ａに面する一方の面２ａと、反対側の他方の面２ｂとを有している。外周フランジ部３は、膜部２よりも大きな厚みに設定され、断面略矩形状に成形され、その厚み方向の一方の端面を上記通気孔３３を設けた一方のハウジング３１Ａに対する被押圧面（第１被押圧面）３ａとされ、他方の端面を他方のハウジング（第２ハウジング）３１Ｂによって押圧される被押圧面（第２被押圧面）３ｂとされている。第１被押圧面３ａと膜部２の一方の面２ａは同一平面上に配置されて面一状の平面をなしている。第２被押圧面３ｂは膜部２の他方の面２ｂよりも厚み方向に突出している。 As a detailed structure of the diaphragm 1, the film portion 2 is formed in a flat plate shape having a uniform thickness over the entire surface (except when the thick portion 4 described later is provided), and the vent 33 is provided. It has one surface 2a facing one housing (first housing) 31A and the other surface 2b on the opposite side. The outer peripheral flange portion 3 is set to a thickness larger than the membrane portion 2 and is formed into a substantially rectangular cross section, and one end face in the thickness direction is pressed against the one housing 31A provided with the vent hole 33 The other end surface is a pressed surface (second pressed surface) 3b that is pressed by the other housing (second housing) 31B. The first surface 3a to be pressed and the one surface 2a of the film portion 2 are disposed on the same plane to form a flush flat surface. The second pressed surface 3 b protrudes in the thickness direction more than the other surface 2 b of the film portion 2.
　尚、ダイアフラム１の作動時に膜部２が通気孔３３と干渉する（膜部２が通気孔３３に食い込む）のを抑制するため、膜部２の平面中央には、先端面４ａに凹み５を設けた厚肉部４が一体成形され、これに対応して一方のハウジング３１Ａにおける通気孔３３の開口周縁部には、厚肉部４が嵌まり込む凹部３４が設けられているが、これらの厚肉部４や凹部３４は必須の構成ではないため、設けられなくても良い。 Incidentally, in order to suppress that the membrane part 2 interferes with the vent hole 33 (the membrane part 2 bites into the vent hole 33) at the time of operation of the diaphragm 1, a recess 5 is formed in the tip surface 4a in the plane center of the membrane part 2. The thick portion 4 provided is integrally molded, and correspondingly, the recess 34 into which the thick portion 4 is fitted is provided at the opening peripheral portion of the vent 33 in one housing 31A. The thick portion 4 and the recess 34 are not essential components, and may not be provided.
　上記通気孔３３を設けた一方のハウジング３１Ａには、膜部２の一方の面２ａが略全面に亙って接触する平面部３５が設けられている。一対のハウジング３１Ａ，３１Ｂ間には、ダイアフラム１の外周フランジ部３を装着するための環状の装着部３６（図２参照）が設けられ、このため、一方のハウジング３１Ａには環状の段差部３７が設けられて装着部３６の外周壁３６ａが形成されるとともに他方のハウジング３１Ｂには突起状を呈する環状のストッパ部３８が設けられて装着部３６の内周壁３６ｂが形成されている。 In one housing 31A provided with the air vent 33, a flat portion 35 is provided in which one surface 2a of the membrane portion 2 contacts substantially the entire surface. An annular mounting portion 36 (see FIG. 2) for mounting the outer peripheral flange portion 3 of the diaphragm 1 is provided between the pair of housings 31A and 31B. Therefore, an annular step portion 37 is provided on one housing 31A. Is formed to form the outer peripheral wall 36a of the mounting portion 36, and the other housing 31B is provided with an annular stopper portion 38 having a projecting shape, and the inner peripheral wall 36b of the mounting portion 36 is formed.
　装着部３６の厚み方向の寸法ｃ（図２参照）は、外周フランジ部３の自由状態における厚み方向の寸法ｄ（図１参照）よりも小さく設定され（ｃ＜ｄ）、これに対して、装着部３６の幅方向（径方向）の寸法φｅ（図２参照）は、外周フランジ部３の自由状態における幅方向の寸法φｆ（図１参照）よりも大きく設定されている（φｅ＞φｆ）。また一方のハウジング３１Ａの平面部３５と他方のハウジング３１Ｂのストッパ部３８との間隔ｇ（図２参照）は、膜部２の厚み寸法ｈ（図１参照）と同じか、または膜部２の厚み寸法ｈよりも少々大きく設定されている（ｇ≧ｈ）。 The dimension c (see FIG. 2) in the thickness direction of the mounting portion 36 is set smaller than the dimension d (see FIG. 1) in the thickness direction in the free state of the outer peripheral flange portion 3 (c <d). The dimension φe (see FIG. 2) in the width direction (radial direction) of the mounting portion 36 is set larger than the dimension φf (see FIG. 1) in the width direction in the free state of the outer peripheral flange portion 3 (φe> φf) . Further, the gap g (see FIG. 2) between the flat portion 35 of one housing 31A and the stopper portion 38 of the other housing 31B is the same as the thickness dimension h (see FIG. 1) of the membrane portion 2 or It is set to be slightly larger than the thickness dimension h (g ≧ h).
　以上の事項を前提として、当該ダイアフラム１を一対のハウジング３１Ａ，３１Ｂ間に装着すると、図２に示すように膜部２がその一方の面２ａをもって一方のハウジング３１Ａの平面部３５に接触した状態が初動姿勢となり、この初動姿勢のダイアフラム１に圧力が作用することにより膜部２がハウジング３１Ａの平面部３５から離れる。外周フランジ部３は、図１から図２へと示すようにハウジング３１Ａ，３１Ｂ間に装着されたときに圧縮変形せしめられるが、このように外周フランジ部３が圧縮変形せしめられても膜部２はハウジング３１Ａの平面部３５に接触した状態を保つのが本来のあるべき姿とされる。しかしながら上記したようにダイアフラム１の断面形状の如何によっては、図６（Ｃ）に示したように外周フランジ部３をハウジング３１Ａ，３１Ｂに装着したのみの初動姿勢において既に膜部２がハウジング３１Ａの平面部３５から離れて浮き上がってしまうことがあり、このような場合にはこれに対策する必要がある。 Assuming that the diaphragm 1 is mounted between the pair of housings 31A and 31B on the premise of the above, the film portion 2 is in contact with the flat surface portion 35 of the one housing 31A with the one surface 2a as shown in FIG. Becomes an initial movement posture, and pressure is applied to the diaphragm 1 in the initial movement posture, so that the film portion 2 is separated from the flat portion 35 of the housing 31A. The outer peripheral flange portion 3 is compressed and deformed when mounted between the housings 31A and 31B as shown in FIG. 1 to FIG. 2, but even if the outer peripheral flange portion 3 is compressed and deformed in this manner, the membrane portion 2 Is supposed to be in contact with the flat portion 35 of the housing 31A. However, as described above, depending on the cross-sectional shape of the diaphragm 1, as shown in FIG. 6C, the membrane portion 2 is already in the housing 31A in the initial posture where the outer peripheral flange portion 3 is attached to the housings 31A and 31B. In this case, it is necessary to take measures against such a case, because it may float away from the flat portion 35.
　そこで、本願発明者らは、本願発明をなすに至ったもので、これに伴って以下の実施例を提案する。 Therefore, the inventors of the present invention have made the present invention, and in conjunction with this, propose the following embodiments.
　すなわち図１に示すように、当該実施例に係るダイアフラム１においては、外周フランジ部３の第１被押圧面３ａに平面上一部の立体形状７が設けられ、この立体形状７が図２に示すように、外周フランジ部３がハウジング３１Ａ，３１Ｂ間に装着されて圧縮変形せしめられたときにこの外周フランジ部３の変形により膜部２に浮き上がり現象が発生するのを抑制すべく外周フランジ部３と一方のハウジング３１Ａとの間にフランジ変形時の逃げ空間となる厚み方向空隙８（図２に示す）を設定するものとされている。 That is, as shown in FIG. 1, in the diaphragm 1 according to the embodiment, the first pressed surface 3a of the outer peripheral flange portion 3 is provided with a three-dimensional shape 7 on a plane, and this three-dimensional shape 7 is shown in FIG. As shown, when the outer peripheral flange portion 3 is mounted between the housings 31A and 31B and compressed and deformed, the outer peripheral flange portion is suppressed to suppress the occurrence of the floating phenomenon on the film portion 2 due to the deformation of the outer peripheral flange portion 3. A thickness direction air gap 8 (shown in FIG. 2), which is a clearance space at the time of flange deformation, is set between 3 and one of the housings 31A.
　立体形状７は具体的には、第１被押圧面３ａの径方向中央部に設けられた突起９として設けられ、このような突起９が設けられることにより装着状態において突起９の外周側であって外周フランジ部３の第１被押圧面３ａとハウジング装着部３６の底面３６ｃとの間に厚み方向空隙８が設定される。突起９は、図１に示すダイアフラム１の中心軸を含む平面で切った断面において円弧形に形成され、図１の下方から見た平面視では第１被押圧面３ａの全周に亙って環状に形成されているが、その平面視形状は環状に限定するものではなく、またシール性に問題を生じなければ、環状でなく複数の突起を第１被押圧面３ａ上の周方向に並べる配置であっても良い。 Specifically, the three-dimensional shape 7 is provided as a projection 9 provided at the radial center of the first pressed surface 3a, and by providing such a projection 9, it is on the outer peripheral side of the projection 9 in the mounted state. A gap 8 in the thickness direction is set between the first pressed surface 3 a of the outer peripheral flange portion 3 and the bottom surface 36 c of the housing mounting portion 36. The projection 9 is formed in an arc shape in a cross section cut by a plane including the central axis of the diaphragm 1 shown in FIG. 1 and extends over the entire circumference of the first pressed surface 3a in a plan view seen from the lower side of FIG. Is formed in an annular shape, but the shape in plan view is not limited to an annular shape, and if it does not cause a problem in the sealability, the plurality of projections are not annular but in the circumferential direction on the first pressed surface 3a It may be arranged side by side.
　また、外周フランジ部３は、当該外周フランジ部３がハウジング３１Ａ，３１Ｂ間に装着されたときに当該外周フランジ部３の外周面３ｃとハウジング装着部３６の外周壁３６ａとの間に径方向空隙１０（図２に示す）を形成可能な外径寸法に設定されている。外周フランジ部３の外周面３ｃにはその一部に突起（図示せず）が設けられてこの突起がハウジング装着部３６の外周壁３６ａに接するものであっても良い。 Further, when the outer peripheral flange portion 3 is mounted between the housings 31A and 31B, the outer peripheral flange portion 3 has a radial gap between the outer peripheral surface 3c of the outer peripheral flange portion 3 and the outer peripheral wall 36a of the housing mounting portion 36. It is set to the outside diameter size which can form 10 (shown in FIG. 2). A protrusion (not shown) may be provided on a part of the outer peripheral surface 3 c of the outer peripheral flange portion 3 and the protrusion may be in contact with the outer peripheral wall 36 a of the housing mounting portion 36.
　また、外周フランジ部３の第２被押圧面３ｂは平坦面であっても良いが、当該実施例ではこの第２被押圧面３ｂにも平面上一部の立体形状１１が設けられており、この立体形状１１は具体的には、第２被押圧面３ｂの径方向中央部に突起１２として設けられ、このような突起１２が設けられることにより装着状態において図２に示すように、突起１２の外周側であって外周フランジ部３の第２被押圧面３ｂとハウジング装着部３６の反対側の底面３６ｄとの間に厚み方向空隙１３が設定される。突起１２は前記突起９と同様、図１に示すダイアフラム１の中心軸を含む平面で切った断面において円弧形に形成され、図１の上方下方から見た平面視では第２被押圧面３ｂの全周に亙って環状に形成されているが、その平面視形状は環状に限定するものではなく、またシール性に問題を生じなければ、環状でなく複数の突起を円周上に並べる構造であっても良い。 In addition, although the second pressed surface 3b of the outer peripheral flange portion 3 may be a flat surface, in this embodiment, the second pressed surface 3b is also provided with a three-dimensional shape 11 of a part on a plane, Specifically, this three-dimensional shape 11 is provided as a projection 12 at the center in the radial direction of the second pressed surface 3b, and by providing such a projection 12, as shown in FIG. A thickness direction air gap 13 is set between the second pressed surface 3 b of the outer peripheral flange portion 3 and the bottom surface 36 d on the opposite side of the housing mounting portion 36 on the outer peripheral side. Similar to the projection 9, the projection 12 is formed in an arc shape in a cross section taken along a plane including the central axis of the diaphragm 1 shown in FIG. 1 and has a second pressed surface 3b However, the plan view shape is not limited to an annular shape, and if there is no problem with the sealability, the plurality of projections are not arranged in a circle, but are circumferentially arranged. It may be a structure.
　上記構成のダイアフラム１によれば、外周フランジ部３の第１被押圧面３ａに平面上一部の立体形状７すなわち突起９が設けられ、これにより突起９の外周側であって外周フランジ部３の第１被押圧面３ａとハウジング装着部３６の底面３６ｃとの間に厚み方向空隙８が形成されている。この厚み方向空隙８は、ダイアフラム１が第１ハウジング３１Ａおよび第２ハウジング３１Ｂの間に装着された際に図１、２に示す上下方向の圧縮による外周フランジ部３の弾性変形を吸収する大きさとなっている。したがって外周フランジ部３が圧縮変形してもその影響が膜部２に及びにくくなるために、膜部２に図６（Ｃ）のような浮き上がり現象が発生するのを抑制することができる。尚、厚み方向空隙８は突起９の外周側のみでなく内周側にも設けられることがある。 According to the diaphragm 1 having the above-described configuration, the first pressed surface 3a of the outer peripheral flange portion 3 is provided with a three-dimensional shape 7 in a plan view, that is, the projection 9, thereby providing the outer peripheral flange portion 3 on the outer peripheral side of the projection 9. A gap 8 in the thickness direction is formed between the first pressed surface 3 a and the bottom surface 36 c of the housing mounting portion 36. The thickness direction air gap 8 has a size that absorbs elastic deformation of the outer peripheral flange portion 3 due to vertical compression shown in FIGS. 1 and 2 when the diaphragm 1 is mounted between the first housing 31A and the second housing 31B. It has become. Therefore, even if the outer peripheral flange portion 3 is compressed and deformed, the effect is less likely to be applied to the film portion 2, so that it is possible to suppress the occurrence of the floating phenomenon as shown in FIG. The thickness direction air gap 8 may be provided not only on the outer peripheral side of the projection 9 but also on the inner peripheral side.
　また、当該実施例では併せて、外周フランジ部３の外周面３ｃとハウジング装着部３６の外周壁３６ａとの間に径方向空隙１０が形成されている。この径方向空隙１０は、ダイアフラム１が第１ハウジング３１Ａおよび第２ハウジング３１Ｂの間に装着された際に図１、２に示す上下方向の圧縮による外周フランジ部３の弾性変形の一部を吸収している。厚み方向空隙８と併せると、外周フランジ部３の弾性変形を吸収する空隙を一層拡大することができ、膜部２の浮き上がりの発生をより容易に抑制することができる。 In addition, in the embodiment, a radial gap 10 is formed between the outer peripheral surface 3 c of the outer peripheral flange portion 3 and the outer peripheral wall 36 a of the housing mounting portion 36. When the diaphragm 1 is mounted between the first housing 31A and the second housing 31B, the radial air gap 10 absorbs a part of elastic deformation of the outer peripheral flange portion 3 due to vertical compression shown in FIGS. doing. Together with the thickness direction air gap 8, the air gap that absorbs the elastic deformation of the outer peripheral flange portion 3 can be further enlarged, and the occurrence of the floating of the film portion 2 can be more easily suppressed.
　さらに、当該実施例では併せて、外周フランジ部３の第２被押圧面３ｂにも立体形状１１すなわち突起１２が設けられることで、突起１２の外周側において第２被押圧面３ｂとハウジング装着部３６の底面３６ｄとの間に厚み方向空隙１３が形成される。この厚み方向空隙１３も、ダイアフラム１が第１ハウジング３１Ａおよび第２ハウジング３１Ｂの間に装着された際に図１、２に示す上下方向の圧縮による外周フランジ部３の弾性変形の一部を吸収している。厚み方向空隙８および径方向空隙１０と併せて、外周フランジ部３の弾性変形を吸収する空隙をより一層拡大することができ、膜部２の浮き上がりの発生をさらに容易に抑制することができる。尚、厚み方向空隙１３は突起１２の外周側のみでなく内周側に形成されても良い。 Furthermore, in the present embodiment, the third pressed surface 3b of the outer peripheral flange portion 3 is also provided with the three-dimensional shape 11, that is, the protrusion 12, so that the second pressed surface 3b and the housing mounting portion on the outer peripheral side of the protrusion 12 A thickness direction air gap 13 is formed between the bottom surface 36 d of 36. This thickness direction air gap 13 also absorbs part of elastic deformation of the outer peripheral flange portion 3 due to vertical compression shown in FIGS. 1 and 2 when the diaphragm 1 is mounted between the first housing 31A and the second housing 31B. doing. In combination with the thickness direction gap 8 and the radial direction gap 10, the gap that absorbs the elastic deformation of the outer peripheral flange portion 3 can be further enlarged, and the occurrence of the floating of the film portion 2 can be further easily suppressed. The thickness direction air gap 13 may be formed not only on the outer peripheral side of the projection 12 but also on the inner peripheral side.
　また、前記立体形状７，１１である突起９，１２などの凸部は外周フランジ部３の第１被押圧面３ａまたは第２被押圧面３ｂにそれぞれ複数が平行に設けられる場合もあり、この場合には、突起９，１２同士の間にゴム状弾性体の逃げ場となる厚み方向空隙８，１３が設定される。 In addition, a plurality of convex portions such as the projections 9 and 12 having the three- dimensional shapes 7 and 11 may be provided in parallel to the first pressed surface 3a or the second pressed surface 3b of the outer peripheral flange portion 3, respectively. In this case, the gaps 8, 13 in the thickness direction are provided between the protrusions 9, 12 as a relief for the rubber-like elastic material.
　また、立体形状７，１１は突起９，１２などの凸部の代わりに凹部であっても良く、この場合には、外周フランジ部３の第１被押圧面３ａまたは第２被押圧面３ｂがハウジング装着部３６の底面３６ｃ，３６ｄに直接接触し圧接せしめられた状態で外周フランジ部３とハウジング装着部３６の底面３６ｃ，３６ｄとの間にゴム状弾性体の逃げ場となる空隙８，１３が設定される。凹部はこれも複数が平行に設けられる場合がある。他の実施例として示す図３および図４では、上下の立体形状７，１１のうち第２被押圧面３ｂに設けられる図上上側の立体形状１１が溝状の凹部１４によって形成されている。 The three- dimensional shapes 7 and 11 may be recesses instead of the projections 9 and 12, etc. In this case, the first pressed surface 3a or the second pressed surface 3b of the outer peripheral flange portion 3 In the state of being in direct contact with and pressed against the bottom surfaces 36c and 36d of the housing mounting portion 36, the air gaps 8 and 13 serving as escape areas of the rubber-like elastic body are between the outer peripheral flange 3 and the bottom surfaces 36c and 36d of the housing mounting portion 36. It is set. A plurality of recesses may also be provided in parallel. In FIGS. 3 and 4 shown as another embodiment, the upper three-dimensional shape 11 provided on the second pressed surface 3b of the upper and lower three- dimensional shapes 7 and 11 is formed by the groove-shaped recess 14.
　尚、上記各空隙８，１０，１３は、外周フランジ部３がハウジング３１Ａ，３１Ｂ間に挟まれて圧縮変形せしめられたときにゴム状弾性体の逃げ場として作用するものであるため、装着に伴う圧縮変形が完了した状態（装着作業が完了した状態）では、その一部または全部が消失（ゴム状弾性体で満たされて空間として存在しなくなる）することもある。 Each of the air gaps 8, 10 and 13 acts as a relief for the rubber-like elastic body when the outer peripheral flange portion 3 is compressed and deformed while being sandwiched between the housings 31A and 31B. In a state in which the compression deformation is completed (the state in which the mounting operation is completed), a part or the whole may disappear (the rubber-like elastic material is filled and it does not exist as a space).
　１　ダイアフラム
　２　膜部
　２ａ　一方の面
　２ｂ　他方の面
　３　外周フランジ部
　３ａ　第１被押圧面
　３ｂ　第２被押圧面
　３ｃ　外周面
　４　厚肉部
　４ａ　先端面
　５　凹み
　７，１１　立体形状
　８，１３　厚み方向空隙
　９，１２　突起
　１０　径方向空隙
　１４，３４　凹部
　３１，３１Ａ，３１Ｂ　ハウジング
　３２　圧力室
　３３　通気孔
　３５　平面部
　３６　装着部
　３６ａ　外周壁
　３６ｂ　内周壁
　３６ｃ，３６ｄ　底面
　３７　段差部
　３８　ストッパ部
　３９　連通孔 DESCRIPTION OF SYMBOLS 1 diaphragm 2 film | membrane part 2a one surface 2b other surface 3 outer periphery flange part 3a 1st to-be-pressed surface 3b 2nd to-be-pressed surface 3c outer peripheral surface 4 thick part 4a front end surface 5 recess 7, 11 solid shape 8, 13 thickness Directional air gap 9, 12 Projection 10 Radial air gap 14, 34 Recess 31, 31A, 31B Housing 32 Pressure chamber 33 Air vent 35 Flat portion 36 Mounting portion 36a Outer peripheral wall 36b Inner peripheral wall 36c, 36d Bottom surface 37 Stepped portion 38 Stopper portion 39 Communication Hole

Claims (5)

  1. 　可撓変形する膜部と、該膜部の周縁部に一体に設けられた外周フランジ部とを有し、該外周フランジ部が一対の第１ハウジングと第２ハウジングとの間に挟持されて装着されるダイアフラムにおいて、
    　前記外周フランジ部は、前記ダイアフラムの厚み方向における一方の面であり、前記第１ハウジングに対して密着する第１被押圧面と、該第１被押圧面に凸部または凹部よりなる立体形状とを有し、
    　前記外周フランジ部が前記第１ハウジングと第２ハウジングとの間で圧縮変形されて装着された状態で、前記立体形状は前記外周フランジ部と前記第１ハウジングとの間に前記厚み方向に厚み方向空隙を形成することを特徴とするダイアフラム。     The flexible film has a membrane portion that deforms flexibly, and an outer peripheral flange portion integrally provided on the peripheral edge portion of the membrane portion, and the outer peripheral flange portion is held by being held between a pair of first housing and second housing At the diaphragm being
    The outer peripheral flange portion is one surface in the thickness direction of the diaphragm, and has a first pressed surface closely attached to the first housing, and a three-dimensional shape including a convex portion or a recessed portion on the first pressed surface. Have
    The three-dimensional shape is a thickness direction in the thickness direction between the outer peripheral flange portion and the first housing in a state where the outer peripheral flange portion is mounted by being compressed and deformed between the first housing and the second housing. A diaphragm characterized by forming an air gap.
  2. 　前記立体形状は、前記第１被押圧面の径方向中央部に設けられた環状突起であり、前記外周フランジ部が前記第１ハウジングと第２ハウジングとの間で圧縮変形されて装着された状態で、前記厚み方向空隙を前記第１被押圧面の前記環状突起より径方向外側に形成することを特徴とする請求項１に記載のダイアフラム。 The three-dimensional shape is an annular protrusion provided at a radial center of the first pressed surface, and the outer peripheral flange portion is mounted by being compressed and deformed between the first housing and the second housing. 2. The diaphragm according to claim 1, wherein the thickness direction air gap is formed radially outward of the annular protrusion of the first pressed surface.
  3. 　前記外周フランジ部は、前記第１ハウジングと第２ハウジングとの間に装着された状態で、当該外周フランジ部の外周面と前記第１および第２ハウジングの少なくとも一つとの間に前記ダイアフラムの径方向において径方向空隙を形成可能な外径寸法に設定されていることを特徴とする請求項１または２に記載のダイアフラム。 The diameter of the diaphragm between the outer peripheral surface of the outer peripheral flange portion and at least one of the first and second housings in a state where the outer peripheral flange portion is mounted between the first housing and the second housing. The diaphragm according to claim 1 or 2, wherein an outer diameter dimension capable of forming a radial gap in a direction is set.
  4. 　前記外周フランジ部は、前記ダイアフラムの厚み方向における他方の面であり前記第２ハウジングに押圧される第２被押圧面と、該第２被押圧面に凸部または凹部からなる立体形状とを有することを特徴とする請求項１ないし３の何れかに記載のダイアフラム。 The outer peripheral flange portion is the other surface in the thickness direction of the diaphragm, and has a second pressed surface to be pressed by the second housing, and a solid shape including a convex portion or a recessed portion on the second pressed surface. The diaphragm according to any one of claims 1 to 3, characterized in that:
  5. 　第１ハウジングと第２ハウジングとでダイアフラムを挟持してなるダイアフラム支持構造であって、前記ダイアフラムとして請求項１ないし４の何れかに記載のダイアフラムを備えたことを特徴とするダイアフラム支持構造。 A diaphragm support structure comprising a diaphragm held by a first housing and a second housing, comprising: the diaphragm according to any one of claims 1 to 4 as the diaphragm.
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