CN102822573B

CN102822573B - Diaphragm

Info

Publication number: CN102822573B
Application number: CN201180016086.1A
Authority: CN
Inventors: 竹下修二; 繁田一真; 青叶广治
Original assignee: Nok Corp; Advics Co Ltd
Current assignee: Nok Corp; Advics Co Ltd
Priority date: 2010-03-29
Filing date: 2011-03-24
Publication date: 2015-05-13
Anticipated expiration: 2031-03-24
Also published as: CN102822573A; US20130014639A1; JP2011208675A; WO2011122424A1; JP5369037B2

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

Barrier film

Technical field

The present invention relates to a kind of barrier film, in more detail, relate to a kind of barrier film being adapted at the middle uses such as the accumulator of vehicle hydraulic control device.

Background technique

Previously, as shown in Figure 5, there will be a known a kind of barrier film 1 of rubber-like elasticity system, this barrier film 1 has the membranous part 2 of flexible deformation and is arranged at the peripheral outer lips portion 3 of peripheral portion of this membranous part 2 integratedly, and this barrier film 1 uses in the accumulator of such as vehicle hydraulic control device, is installed on the pressure chamber 32 in shell 31, along with the effect of pressure, membranous part 2 flexible deformation, while the volume-variation making pressure chamber 32, by vent 33 opening and closing.

In the barrier film 1 of above-mentioned summary, recently, as shown in Fig. 6 (A), the end face 3a developing a kind of one side 2a of thickness direction of membranous part 2 and the thickness direction in peripheral outer lips portion 3 is configured at the barrier film of the type on same plane, as shown in Fig. 6 (B), this barrier film 1 to be installed between a pair shell 31A, 31B up and down by being clamped in peripheral outer lips portion 3, now, as first motion posture, membranous part 2 becomes the state that its one side 2a contacts with the planar surface portion 35 of shell 31A of the figure upper and lower sides being provided with above-mentioned vent 33.

But, according to the barrier film 1 of this Fig. 6 (A), (B), due to above-mentioned peripheral outer lips portion 3 when being installed between a pair shell 31A, 31B by compressive strain widely, therefore affect by it, as shown in Fig. 6 (C), the one side 2a of membranous part 2 leaves from the planar surface portion 35 of the shell 31A of downside and heaves, in this case, need heaving, to guarantee correct first motion posture of suppression membranous part 2.

Prior art document

Patent documentation

Patent documentation 1: Japanese Unexamined Patent Publication 2007-269298 publication (Figure 18)

Summary of the invention

(inventing the problem that will solve)

In view of above each point, the object of the present invention is to provide a kind of barrier film that can suppress to occur on membranous part bulge phenomenon when barrier film being installed on shell.

(technological scheme of technical solution problem)

In order to reach above-mentioned purpose, barrier film according to a first aspect of the present invention, the peripheral outer lips portion of the membranous part with flexible deformation and the peripheral portion being arranged at this membranous part integratedly, this peripheral outer lips portion is installed between a pair first shells and second housing by clamping, the feature of described barrier film is, described peripheral outer lips portion has: first is pressed face, is the face of the side in the thickness direction of described barrier film, is close contact in described first shell; Stero shape, first is pressed on face at this and is made up of protuberance or recess; Under the state that described peripheral outer lips portion to be installed on by compressive strain between the first shell and second housing, described stero shape forms thickness direction space between described peripheral outer lips portion and described first shell on described thickness direction.

Barrier film of the present invention has the membranous part of flexible deformation and is arranged at the peripheral outer lips portion of peripheral portion of this membranous part integratedly, this peripheral outer lips portion is installed between a pair first shells and second housing by clamping, such as, in the situations such as the accumulator being used in vehicle hydraulic control device, membranous part is located in the state of the first shell as first motion posture, when the space between the first shell and barrier film and when producing pressure reduction between the space between barrier film and second housing, membranous part carries out action in the mode left from the first shell, formation according to a first aspect of the present invention, be pressed mask by only making first and have stero shape, easily can form thickness direction space between periphery lip part and the first shell, by utilizing thickness direction space to absorb the distortion produced from first shell in peripheral outer lips portion and the compression of second housing, thus under the state be installed between the first shell and second housing at barrier film, namely, in the first motion posture not producing above-mentioned pressure reduction, the barrier film produced due to the impact of above-mentioned distortion can be suppressed to heave from the first shell.

In addition, the feature of barrier film is according to a second aspect of the present invention, in the barrier film that above-mentioned first aspect is recorded, described stero shape is be arranged at the circular protrusion that described first is pressed the radial central part in face, under the state that described peripheral outer lips portion to be installed on by compressive strain between described first shell and second housing, compared with the described circular protrusion being pressed face with described first, form described thickness direction space at radial outside.

According to the formation of second aspect, pass through circular protrusion, thickness direction space is formed at radial outside compared with the circular protrusion being pressed face with first, so the volume in thickness direction space can be guaranteed fully, the distortion produced from first shell in peripheral outer lips portion and the compression of second housing can be absorbed more easily.

In addition, the feature of barrier film is according to a third aspect of the present invention, in the barrier film that above-mentioned first aspect or second aspect are recorded, described peripheral outer lips portion is configured to be installed under the state between described first shell and second housing, the outer circumferential face in this peripheral outer lips portion and described first and second housing at least one between can to form the outside dimension of radial gap in the radial direction of described barrier film.

According to the formation of the third aspect, by radial gap, the distortion produced from first shell in peripheral outer lips portion and the compression of second housing can be absorbed more easily.

In addition, the feature of barrier film is according to a fourth aspect of the present invention, in the barrier film that either side is recorded in above-mentioned first aspect to the third aspect, described peripheral outer lips portion has: second is pressed face, for the face of the opposite side in the thickness direction of described barrier film, be pressed against described second housing; Stero shape, second is pressed on face at this and is made up of protuberance or recess.

According to the formation of fourth aspect, be pressed mask by only making second and have stero shape, easily can form thickness direction space between periphery lip part and second housing, by thickness direction space, the distortion produced from first shell in peripheral outer lips portion and the compression of second housing can be absorbed more easily.

In addition, diaphragm support structure according to a fifth aspect of the present invention, formed by the first shell and second housing clamping barrier film, the feature of described diaphragm support structure is, as described barrier film, possesses the barrier film that in first aspect to fourth aspect, either side is recorded.

According to the formation of the 5th aspect, in diaphragm support structure, the barrier film recorded by either side in first aspect to fourth aspect, can suppress membranous part to be heaved from the first shell.

(effect of invention)

The present invention realizes following effect.

Namely, in the present invention, as mentioned above, owing to setting thickness direction and radial space around the lip part of periphery, the place (escaping げ Games) of keeping out of the way of rubber-like elastic body during lip deforms is guaranteed, so the distortion in peripheral outer lips portion is kept out of the way place absorption by this, the impact of distortion is difficult to involve the membranous part to its inner circumferential side.Therefore, it is possible to suppress, on membranous part, bulge phenomenon occurs, guarantee its correct first motion posture.

Accompanying drawing explanation

Fig. 1 is the figure of the barrier film illustrated involved by embodiments of the invention, and (A) is the hemisection sectional view of state before it is installed, and (B) is the major component expanded view of (A).

Fig. 2 is the figure that same barrier film is shown, (A) is the hemisection sectional view of its installment state, and (B) is the major component expanded view of (A).

Fig. 3 is the figure of the barrier film illustrated involved by other embodiments of the present invention, and (A) is the hemisection sectional view of state before it is installed, and (B) is the major component expanded view of (A).

Fig. 4 is the figure that same barrier film is shown, (A) is the hemisection sectional view of its installment state, and (B) is the major component expanded view of (A).

Fig. 5 is the sectional view of the installment state of the barrier film illustrated involved by conventional example.

Fig. 6 is the figure of the barrier film illustrated involved by comparative example, and (A) is the hemisection sectional view of state before it is installed, and (B) is the hemisection sectional view of its installment state, and (C) is the hemisection sectional view of undesirable condition generation state.

Symbol description

1 barrier film

2 membranous parts

The face of 2a side

The face of 2b opposite side

3 peripheral outer lips portions

3a first is pressed face

3b second is pressed face

3c outer circumferential face

4 heavy sections

4a front-end face

5 depressions

7,11 stero shapes

8,13 thickness direction spaces

9,12 projections

10 radial gaps

14,34 recesses

31,31A, 31B shell

32 pressure chambers

33 vents

35 planar surface portion

36 assembly departments

36a periphery wall

36b inner circle wall

36c, 36d bottom surface

37 stepped part

38 retainers

39 intercommunicating pores.

Embodiment

Then, with reference to accompanying drawing, embodiments of the invention are described.

As shown in Figure 1 and Figure 2, barrier film 1 involved by this embodiment is configured as discoid by the rubber-like elastic body of regulation, have integratedly can flexible deformation membranous part 2 and be arranged at the peripheral outer lips portion (periphery assembly department) 3 of ring-type of peripheral portion of this membranous part 2.In addition, barrier film 1 involved by this embodiment uses, by peripheral outer lips portion 3 being clamped upper and lower in the drawings pressure chamber 32(reference Fig. 2 be installed between a pair shell 31A, 31B in shell 31A, 31B in the accumulator of vehicle hydraulic control device carrying out ABS control, ESC control etc.).The shell 31A of downside is in FIG provided with vent 33, the shell 31B of upside is provided with such as with the intercommunicating pore 39 of the fluid communication of the action liquid of vehicle hydraulic pressure installation.

As the detailed configuration of barrier film 1, membranous part 2 be configured as traverse whole mask have impartial thickness planar (but, do not comprise the aftermentioned situation that heavy section 4 is set), there is the face 2a of side of shell (the first shell) 31A and the face 2b of the opposite side of opposition side of the side in the face of being provided with vent 33.Peripheral outer lips portion 3 is set to the thickness larger than membranous part 2, be configured as cross section substantially rectangular shape, the end face of the side of its thickness direction becomes the face that is pressed (first the is pressed face) 3a of the shell 31A relative to the side being provided with above-mentioned vent 33, and the end face of opposite side becomes the face that is pressed (second the is pressed face) 3b pressed by the shell of opposite side (second housing) 31B.The first face 2a being pressed the side of face 3a and membranous part 2 is configured on same plane, forms the plane of same plane shape.Second to be pressed face 3b outstanding to thickness direction from the face 2b of the opposite side of membranous part 2.

And, carry out interfering (membranous part 2 is absorbed in vent 33) to suppress membranous part 2 and vent 33 when barrier film 1 action, at the plane central of membranous part 2, the integrally formed heavy section 4 being provided with depression 5 at front-end face 4a, correspondingly, the opening peripheral portion of the vent 33 in the shell 31A of side, arranges the recess 34 embedded by heavy section 4, because these heavy sections 4 and recess 34 are not necessary formation, so also can not arrange.

On the shell 31A of side being provided with above-mentioned vent 33, the face 2a arranging the side of membranous part 2 traverses substantially entire surface and carries out the planar surface portion 35 that contacts.Between a pair shell 31A, 31B, the assembly department 36(of the ring-type in the peripheral outer lips portion 3 for installing barrier film 1 is set with reference to Fig. 2), therefore, the flange 31A of side arranges the stepped part 37 of ring-type, thus form the periphery wall 36a of assembly department 36, meanwhile, the shell 31B of opposite side arranges the retainer 38 of the ring-type in overshooting shape, thus form the inner circle wall 36b of assembly department 36.

The size c(of the thickness direction of assembly department 36 is with reference to Fig. 2) be set as that size d(than the thickness direction in the free state in peripheral outer lips portion 3 is with reference to Fig. 1) little (c < d), on the other hand, the size of the width direction (radial direction) of assembly department 36 (with reference to Fig. 2) is set as the size than the width direction in the free state in peripheral outer lips portion 3 (with reference to Fig. 1) is large in addition, interval g(between the retainer 38 of the planar surface portion 35 of the shell 31A of side and the shell 31B of opposite side is with reference to Fig. 2) be set as with the thickness size h(of membranous part 2 with reference to Fig. 1) identical, or than the thickness size h slightly large (g≤h) of membranous part 2.

Using above item as prerequisite, when this barrier film 1 is installed between a pair shell 31A, 31B, as shown in Figure 2, membranous part 2 contacts the planar surface portion 35 of the shell 31A of side state with the face 2a of side becomes first motion posture, by pressure being acted on the barrier film 1 of this first motion posture, thus membranous part 2 leaves from the planar surface portion 35 of shell 31A.As from Fig. 1 to shown in Fig. 2, although peripheral outer lips portion 3 when being installed between shell 31A, 31B by compressive strain, even if peripheral outer lips portion 3 is by compressive strain, membranous part 2 also keeps in touch the state of the planar surface portion 35 of shell 31A and becomes original due attitude.But, as described above, regardless of the sectional shape of barrier film 1, as shown in Fig. 6 (C), only peripheral outer lips portion 3 is being installed in the first motion posture of shell 31A, 31B, membranous part 2 can be there is leave and situation about heaving from the planar surface portion 35 of shell 31A, in this case, need the countermeasure tackled in this.

Therefore, present inventor completes the present invention, and motion following examples thereupon.

Namely, as shown in Figure 1, in the barrier film 1 involved by this embodiment, the stero shape 7 face 3a being provided with last point of plane is pressed at first of periphery lip part 3, this stero shape 7 as shown in Figure 2, in order to suppress periphery lip part 3 to be installed between shell 31A, 31B and by compressive strain time, on membranous part 2, there is bulge phenomenon due to the distortion in this peripheral outer lips portion 3, and be provided with between periphery lip part 3 and the shell 31A of side shown in the thickness direction space 8(Fig. 2 keeping out of the way space when becoming lip deforms).

Specifically, stero shape 7 is provided in the first radial central part being pressed face 3a and is provided with projection 9, by arranging such projection 9, in installment state, at the outer circumferential side of projection 9, between the bottom surface 36c being pressed face 3a and shell assembly department 36 at first of periphery lip part 3, set thickness direction space 8.Projection 9 forms circular arc in the cross section that the plane of the central shaft of the barrier film 1 shown in involved Fig. 1 is cut off, in the plane view watched from the below of Fig. 1, the all-round formation ring-type of face 3a is pressed first, but this plan view shape is not defined as ring-type, in addition, as long as do not have problems in sealing, also can not form ring-type, but be pressed multiple projection that the circumference on the 3a of face is arranged first.

In addition, peripheral outer lips portion 3 is configured to when periphery lip part 3 is installed between shell 31A, 31B, can be formed shown in radial gap 10(Fig. 2 between the outer circumferential face 3c and the periphery wall 36a of shell assembly department 36 in this peripheral outer lips portion 3) outside dimension.On the outer circumferential face 3c of periphery lip part 3, also can be provided with projection (not shown) in its part, and this protuberance contacts is in the periphery wall 36a of shell assembly department 36.

In addition, it also can be tabular surface that second of peripheral outer lips portion 3 is pressed face 3b, but in this embodiment, second the stero shape 11 face 3b being also provided with last point of plane is pressed at this, specifically, this stero shape 11 is provided in the second radial central part being pressed face 3b and is provided with projection 12, by arranging such projection 12, in installment state, as shown in Figure 2, at the outer circumferential side of projection 12, between the bottom surface 36d being pressed the opposition side of face 3b and shell assembly department 36 at second of periphery lip part 3, set thickness direction space 13.Projection 12 is the same with above-mentioned projection 9, circular arc is formed in the cross section that the plane of the central shaft of the barrier film 1 shown in involved Figure 11 is cut off, in the plane view of below viewing above Fig. 1, the all-round formation ring-type of face 3b is pressed second, but this plan view shape is not defined as ring-type, in addition, as long as do not have problems in sealing, also can not form ring-type, but arrange the structure of multiple projection in the circumferential.

According to the barrier film 1 of above-mentioned formation, the stero shape 7 i.e. projection 9 face 3a being arranged last point of plane is pressed at first of periphery lip part 3, thus, at the outer circumferential side of projection 9, between the bottom surface 36c being pressed face 3a and shell assembly department 36 at first of periphery lip part 3, form thickness direction space 8.This thickness direction space 8 is formed when barrier film 1 is installed between the first shell 31A and second housing 31B, absorbs the size of the resiliently deformable in the peripheral outer lips portion 3 produced due to the compression of the above-below direction shown in Fig. 1,2.Therefore, even if peripheral outer lips portion 3 is by compressive strain, its impact is also difficult to involve membranous part 2, so can suppress the such bulge phenomenon of Fig. 6 (C) occurs on membranous part 2.Further, thickness direction space 8 is also not only arranged at the outer circumferential side of projection 9, also can be arranged at inner circumferential side.

In addition, in this embodiment, also between the outer circumferential face 3c and the periphery wall 36a of shell assembly department 36 of periphery lip part 3, be formed with radial gap 10 simultaneously.When barrier film 1 is installed between the first shell 31A and second housing 31B, this radial gap 10 absorbs a part for the resiliently deformable in the peripheral outer lips portion 3 produced due to the compression of the above-below direction shown in Fig. 1,2.If be combined with thickness direction space 8, more can expanded the space of the resiliently deformable absorbing peripheral outer lips portion 3, the generation of heaving of membranous part 2 can be suppressed more easily.

In addition, in this embodiment, also be pressed on the 3b of face at second of periphery lip part 3 simultaneously and be provided with stero shape 11 i.e. projection 12, therefore at the outer circumferential side of projection 12, between the second bottom surface 36d being pressed face 3b and shell assembly department 36, form thickness direction space 13.When barrier film 1 is installed between the first shell 31A and second housing 31B, this thickness direction space 13 also absorbs a part for the resiliently deformable in the peripheral outer lips portion 3 produced due to the compression of the above-below direction shown in Fig. 1,2.Be combined with thickness direction space 8 and radial gap 10, more can expand the space of the resiliently deformable absorbing peripheral outer lips portion 3, the generation of heaving of membranous part 2 can be suppressed more easily.Further, thickness direction space 13 is also not only formed at the outer circumferential side of projection 12, also can be formed at inner circumferential side.

In addition, also exist and be pressed at first of periphery lip part 3 situation that face 3a or second is pressed protuberance face 3b being arranged abreast multiple projection 9,12 as above-mentioned stero shape 7,11 etc. respectively, in this case, the thickness direction space 8,13 of keeping out of the way place becoming rubber-like elastic body is set each other in projection 9,12.

In addition, stero shape 7,11 also can replace the protuberances such as projection 9,12 for recess, in this case, be pressed under face 3a or second is pressed the state that face 3b directly contacts bottom surface 36c, the 36d being crimped on shell assembly department 36 at first of periphery lip part 3, become the space 8,13 of keeping out of the way place of rubber-like elastic body in the setting between bottom surface 36c, 36d of periphery lip part 3 and shell assembly department 36.Also there is the situation that multiple recess is set abreast.In Fig. 3 and Fig. 4 shown in the embodiment as other, in upper and lower stero shape 7,11, be arranged at the second stero shape 11 being pressed upside in the figure of face 3b and formed by the recess 14 of channel-shaped.

And, because above-mentioned each space 8,10,13 is when periphery lip part 3 to be held between shell 31A, 31B by compressive strain, play the effect keeping out of the way place as rubber-like elastic body, so under the state (state that installation exercise completes) completed with the compressive strain of installing, its part or all disappear (being filled up by rubber-like elastic body, not Existential Space).

Claims

1. a barrier film, the peripheral outer lips portion of the membranous part with flexible deformation and the peripheral portion being arranged at this membranous part integratedly, the feature of described barrier film is,

The face of the thickness direction side of described membranous part at least partially and the end face of the thickness direction side in described peripheral outer lips portion be configured on same plane at least partially, there is the plane of same plane shape;

The end face of the thickness direction opposite side in described peripheral outer lips portion is compared with the face of the thickness direction opposite side of described membranous part, more outstanding in a thickness direction;

When this barrier film is installed between a pair first shells and second housing, described peripheral outer lips portion becomes the state be compressed in a thickness direction between described a pair first shells and second housing, and described membranous part becomes whole of the face of its thickness direction side or the state of substantially entire surface and described first housing contacts;

Described peripheral outer lips portion has first and is pressed face, described first is pressed the end face that face is the thickness direction side in described peripheral outer lips portion, simultaneously for being pressed against the face of described first shell, be pressed described first stero shape face being provided with and being made up of protuberance or recess;

Under the state that described peripheral outer lips portion is compressed between described a pair first shells and second housing in a thickness direction, described stero shape forms thickness direction space between described peripheral outer lips portion and described first shell;

By the compressive strain utilizing described thickness direction space to absorb described peripheral outer lips portion, the impact of this compressive strain is difficult to involve described membranous part, suppresses described membranous part to be heaved from described first shell.

2. barrier film according to claim 1, is characterized in that,

Described stero shape is be arranged at the circular protrusion that described first is pressed the radial central part in face, under the state that described peripheral outer lips portion to be installed on by compressive strain between described first shell and second housing, compared with the described circular protrusion being pressed face with described first, form described thickness direction space at radial outside.

3. barrier film according to claim 1, is characterized in that,

Described peripheral outer lips portion is configured to, being installed under the state between described first shell and second housing, can form the outside dimension of radial gap between at least one of the outer circumferential face in this peripheral outer lips portion and described first shell and second housing in the radial direction of described barrier film.

4. barrier film according to claim 1, is characterized in that,

Described peripheral outer lips portion has: second is pressed face, is the face of the opposite side in the thickness direction of described barrier film, is pressed against described second housing; Stero shape, second is pressed on face at this and is made up of protuberance or recess.

5. a diaphragm support structure, formed by the first shell and second housing clamping barrier film, the feature of described diaphragm support structure is to possess barrier film according to claim 1.