WO1999030544A1 - Structure d'equilibrage de pressions pour boitier hermetique - Google Patents
Structure d'equilibrage de pressions pour boitier hermetique Download PDFInfo
- Publication number
- WO1999030544A1 WO1999030544A1 PCT/JP1998/005568 JP9805568W WO9930544A1 WO 1999030544 A1 WO1999030544 A1 WO 1999030544A1 JP 9805568 W JP9805568 W JP 9805568W WO 9930544 A1 WO9930544 A1 WO 9930544A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- diaphragm
- lid
- airtight case
- case
- housing
- Prior art date
Links
- 239000000463 material Substances 0.000 claims description 18
- 238000012856 packing Methods 0.000 claims description 15
- 230000001681 protective effect Effects 0.000 claims description 5
- 239000012858 resilient material Substances 0.000 abstract 1
- 239000004033 plastic Substances 0.000 description 10
- 239000002184 metal Substances 0.000 description 8
- 239000000758 substrate Substances 0.000 description 8
- 229920001971 elastomer Polymers 0.000 description 6
- 230000008602 contraction Effects 0.000 description 4
- 230000005489 elastic deformation Effects 0.000 description 3
- 239000004952 Polyamide Substances 0.000 description 2
- 239000004734 Polyphenylene sulfide Substances 0.000 description 2
- 229920002647 polyamide Polymers 0.000 description 2
- 229920001707 polybutylene terephthalate Polymers 0.000 description 2
- 229920000069 polyphenylene sulfide Polymers 0.000 description 2
- 239000007779 soft material Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- JOYRKODLDBILNP-UHFFFAOYSA-N Ethyl urethane Chemical compound CCOC(N)=O JOYRKODLDBILNP-UHFFFAOYSA-N 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000010485 coping Effects 0.000 description 1
- 230000000994 depressogenic effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000000806 elastomer Substances 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- -1 polybutylene terephthalate Polymers 0.000 description 1
- 239000004417 polycarbonate Substances 0.000 description 1
- 229920000515 polycarbonate Polymers 0.000 description 1
- 230000003252 repetitive effect Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K5/00—Casings, cabinets or drawers for electric apparatus
- H05K5/06—Hermetically-sealed casings
- H05K5/068—Hermetically-sealed casings having a pressure compensation device, e.g. membrane
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K5/00—Casings, cabinets or drawers for electric apparatus
- H05K5/0026—Casings, cabinets or drawers for electric apparatus provided with connectors and printed circuit boards [PCB], e.g. automotive electronic control units
- H05K5/0047—Casings, cabinets or drawers for electric apparatus provided with connectors and printed circuit boards [PCB], e.g. automotive electronic control units having a two-part housing enclosing a PCB
Definitions
- the present invention relates to a case comprising a housing and a lid, in which electric and electronic components are housed, and an airtight case capable of coping with a pressure difference between the inside and outside of the case while maintaining the airtightness inside and outside the case.
- a case comprising a housing and a lid, in which electric and electronic components are housed
- an airtight case capable of coping with a pressure difference between the inside and outside of the case while maintaining the airtightness inside and outside the case.
- busbars On which circuits including electronic components such as transistors are designed, and electrical components such as motors.
- FIG. 8 is a perspective view of a conventional airtight case 100
- FIG. 8 (b) is a longitudinal sectional view taken along the line bb of FIG. 8 (a).
- the hermetic case 100 is composed of a casing 70 and a lid 80 made of metal, plastic, or the like.
- a connector 72 provided on one side of the casing 70 has a casing 72 inside.
- a plurality of terminals 74 projecting from the inside of the body 70 to the outside of the housing 70 are provided.
- the terminal 74 is connected to a circuit of the board 50 fixed inside the housing 70 on the one hand, and is attached to another member via the connector 72 on the other hand.
- a seal packing 90 is arranged between the end face of the housing 70 and the lid 80, and the housing 70 and the lid 80 are fixed by screws 60 or the like. Fixed.
- Such an airtight case 100 must be completely waterproofed to prevent moisture from entering inside.
- the substrate 50 inside the airtight case 100 may be affected by the outside air conditions such as the temperature and humidity of the outside air.
- the outside air conditions such as the temperature and humidity of the outside air.
- the water contained in the outside air corrodes metal parts such as the circuit of the substrate 50 and often causes poor electrical contact. .
- the airtight case 100 must be excellent in airtightness.
- the electrical and electronic components inside the airtight case 100 heat up during use and the temperature inside the airtight case 100 rises, the air may expand and become high pressure, depending on the conditions. May be negative pressure lower than atmospheric pressure.
- a through hole 704 that opens inside the connector 72 is provided on the side surface of the housing 702, and is provided between the connector 72 and the connector 72 ′ of the mating member D.
- An airtight case 102 provided with a seal packing 92 to prevent the through hole 704 from being exposed to the outside air, and a case 7100 side as shown in Fig. 10
- the airtight case 1 0 2, 1 is covered by the airtight case 1 0 4, etc., which covers the through hole 7 1 4 provided in the The balance between the elimination of the internal / external pressure difference of 04 and the maintenance of waterproofness and airtightness is achieved.
- the through hole 7 1 4 If it is covered with moisture, it will not function as a pressure adjustment hole.
- the conventional airtight cases 100, 102, and 104 have a problem that it is difficult to eliminate the pressure difference between the inside and outside of the airtight case while maintaining airtightness. Further, when the seal packings 90 and 92 must be used, there is a problem that the number of parts and the manufacturing cost increase.
- the first and second pressure equalization structures of the hermetic case according to the present invention are directed to an airtight case in which electric and electronic components are housed therein and the opening of a housing having an opening is covered by a lid.
- a diaphragm portion made of a flexible material is integrally formed on the lid or the housing. Therefore, when a pressure difference occurs between the inside and outside of the airtight case, the diaphragm unit integrally formed on the lid or the housing with a flexible material is elastically deformed by the inside and outside pressure difference, and changes the internal volume of the airtight case. The pressure difference between the inside and outside of the airtight case is reduced without communicating with the outside air.
- the opening of the housing having the opening in which the electric and electronic components are housed is covered with a lid.
- a diaphragm having a convex portion is sandwiched between the housing and the lid, the lid has a notch, and the convex portion is received in the notch.
- the diaphragm having the convex portion is elastically deformed by the pressure difference between the inside and outside, and changes the internal volume of the airtight case.As a result, the airtight case does not communicate with the outside air. Reduce the pressure difference inside and outside the case.
- FIG. 1 shows an airtight case to which an internal / external pressure equalizing structure according to a first embodiment of the present invention is applied.
- FIG. 1 (a) is a perspective view
- FIG. 1 (b) is a view of FIG. 1 (a).
- FIG. 4 is a vertical sectional view taken along line b—b.
- FIG. 2 is a longitudinal section of an airtight case to which an internal / external pressure equalizing structure according to a second embodiment of the present invention is applied.
- FIG. 3 is a partially enlarged vertical cross-sectional view of an airtight case to which an internal / external pressure equalizing structure according to a third embodiment of the present invention is applied.
- FIG. 4 is a partially enlarged longitudinal sectional view of an airtight case to which an internal / external pressure equalizing structure according to a fourth embodiment of the present invention is applied.
- FIG. 5 shows a conventional airtight case.
- FIG. 5 (a) is a perspective view
- FIG. 5 (b) is a longitudinal sectional view taken along the line b_b in FIG. 5 (a).
- FIG. 6 is a partial longitudinal sectional view of another conventional airtight case.
- FIG. 7 is a partial longitudinal sectional view of still another conventional airtight case.
- FIG. 1 (a) is a perspective view of the overall configuration of a hermetic case 10 to which the internal / external pressure equalizing structure according to the first embodiment of the present invention is applied, and FIG. B _ b in Figure (a) It is a line longitudinal cross-sectional view.
- the lid 30 is fixed to the casing via screws 60 or the like.
- the housing 20 has the same configuration as the conventional housing, the description is omitted.
- the lid 30 has a thick lid 36 and a thin diaphragm 34 formed in the center of the lid 36 in a rectangular shape, and is a flexible material such as rubber or plastic. It is formed integrally.
- seal packing 38 is formed around the periphery of the housing 20 at the end face.
- the diaphragm portion 34 elastically deforms so as to protrude outward and inward (see arrows ⁇ and in FIG. 1 (b)).
- the air pressure inside the airtight case 10 becomes equal to the outside air pressure, and the diaphragm portion 34 returns to the original shape. Also, when the pressure inside the airtight case 10 becomes lower than the outside air pressure due to the temperature difference between the inside and the outside of the airtight case 10, the diaphragm portion 34 is elastically deformed so as to be recessed inside the airtight case 10 (Fig. 1). (See arrow B in (b)).
- the internal volume of the airtight case 10 changes according to the pressure difference between the inside and the outside of the airtight case 10.
- the pressure difference between the inside and the outside of the airtight case 10 can be eliminated and equalization can be performed without causing the airtight case 10 to communicate.
- the lid 30 is made of a soft or hard flexible material as a whole. Whether the soft or hard material is used depends on the conditions under which the airtight case 10 is used and the airtight case 1. It can be appropriately selected depending on the rigidity required for zero.
- the lid portion 36 When using a soft material, the lid portion 36 is formed relatively thick to increase the rigidity of the lid portion 36, and when formed from a hard material, the diaphragm portion 34 is formed so as to be easily bent.
- the part 34 is formed relatively thin. Since the seal packing 38 around the lid 30 is formed at the same time when the lid 30 is formed, there is no need to prepare a separate seal packing, and the number of parts can be greatly reduced. .
- FIG. 2 is a longitudinal sectional view of the entire configuration of an airtight case 12 to which an internal / external pressure equalizing structure according to a second embodiment of the present invention is applied.
- the hermetic case 10 is composed of a housing 20 and a cover 300 made of metal or plastic or the like having a predetermined rigidity. After fixing the substrate 50 inside the housing 20, The body 300 and a separate diaphragm 40 are attached to the housing 20 via screws 60 or the like, and cover the opening of the housing 20.
- the housing 20 has the same configuration as the conventional housing, the description is omitted.
- a rectangular cutout 32 is provided at the center of the lid 300.
- the diaphragm 40 is integrally formed of a flexible material such as rubber or plastic, a seal packing 48 is formed around the periphery of the housing 20, and a notch of the lid 300 is formed at the center. It has a convex portion 4 4 corresponding to 3 2.
- the diaphragm 40 and the lid 300 are stacked so that the projections 44 of the diaphragm 40 can be received in the notches 32 of the lid 300, and the fixing means 60 such as screws is used.
- the diaphragm 40 and the lid 300 are attached to the housing 20.
- seal packing 48 around the diaphragm 40 is formed at the same time as the formation of the diaphragm 40, there is no need to prepare a separate seal packing, and the number of parts can be reduced.
- FIG. 3 is a partially enlarged longitudinal sectional view of an airtight case 14 to which an internal / external pressure equalizing structure according to a third embodiment of the present invention is applied.
- the hermetic case 14 also includes a housing 20 (not shown) made of metal or plastic or the like having a predetermined rigidity, and screws 60 etc. (not shown). ), A lid 30 ′ is attached to cover the opening of the housing 20. Since the configuration of the housing 2 () used is the same as that of the first embodiment, the description is omitted.
- the lid 30 ′ used in this embodiment has a thick lid 36 and a thin diaphragm 34 ′ formed in a rectangular shape at the center of the lid 36, and as a whole It is similar to that of the first embodiment in that it is integrally formed of a material having flexibility, but this diaphragm portion 34 'is an elastic bellows 34.
- the lid 30 ′ is also made of a soft or hard flexible material as a whole similarly to the first embodiment, but whether to use the soft or hard is determined by using the airtight case 14. It can be selected as appropriate depending on the conditions required, the rigidity required for the airtight case 14, etc.
- the lid 36 is made relatively thick to increase the rigidity of the lid 36.
- the diaphragm portion 34 ' is formed relatively thin in order to facilitate the bending of the diaphragm portion 34' and the expansion and contraction of the bellows 3400.
- FIG. 4 is a partially enlarged longitudinal sectional view of an airtight case 16 to which an internal / external pressure equalizing structure according to a fourth embodiment of the present invention is applied.
- This airtight case 16 is one in which a separate diaphragm 400 is applied to a housing 20 (not shown) and a lid 300 having the same configuration as that of the second embodiment of the present invention.
- a diaphragm 400 made of a flexible material such as rubber or plastic as a whole has a seal packing 42 ′ (not shown) formed around the end surface of the housing 20, and a lid in the center.
- a projection 4 4 ′ having a shape corresponding to the notch 3 2 of the body 30 is provided, and the projection 4 4 ′ is an elastic bellows 44.
- the internal and external pressure equalizing structures of the second and fourth embodiments of the present invention are applied.
- the notch 32 formed in the lid 300 may be formed in a shape other than a rectangle.
- the shapes of the convex portions 44 and 44 ′ also need to be formed so as to be received corresponding to the shape of the notch 32.
- the lid 36 and the diaphragm 34 which are formed integrally with the lids 30 and 30 ', respectively.
- 34 ' may also be formed in shapes other than rectangular.
- the airtight case 18 includes a housing 20 similar to that of the first embodiment, and a lid 30 ′′ having a diaphragm portion 34 ′′ formed of concavities and convexities formed concentrically on a thin portion. Accordingly, the vertical cross-sectional shape of the diaphragm portion 34 "is a repetitive shape of irregularities (wave shape).
- FIG. 5 (b) is a cross-sectional view taken along the line bb of FIG. 5 (a)
- FIG. 5 (c) is a diagram of a concentric diaphragm portion corresponding to the pressure difference between the inside and outside of the airtight case 18.
- FIG. 5 (d) is a cross-sectional view showing a state in which the diaphragm portion 34 "is elastically deformed so as to protrude outward, and the diaphragm portion 34" is elastically deformed so as to be depressed inward.
- the diaphragm portion 34 is formed integrally with the lid 30", but the diaphragm portion may be formed separately from the lid (not shown). In such a case, a method such as bonding with an adhesive, or providing a flange portion and screwing it into place is used.
- the surfaces of the diaphragm portions 34, 44, 34 ', 44' in FIGS. 1 to 4 can be formed into a corrugated shape as shown in FIG.
- Diaphragm 34 is the outer surface of the lid 30, 300, 30" It is desirable to keep the height below. The reason is that the diaphragm portions 34, 34 ', 34 "and the convex portions 44, 44' of the diaphragms 40, 400 usually have considerably lower strength than the lid 30, 300. 30".
- the lid 300 and the diaphragms 40 and 400 are formed separately, for example, the diaphragms 40 and 400 are made of soft flexible material. Even when formed of a material, the rigidity of the airtight cases 12 and 16 can be increased by forming the lid 300 with a metal or a plastic having high rigidity.
- FIG. 6 is a perspective view of the overall configuration of an airtight case 180 to which an internal / external pressure equalizing structure according to a sixth embodiment of the present invention is applied.
- the housing 20 'of the hermetic case is different from that of the above embodiment, and has a diaphragm 35 on one side, and the opening of the housing 20' is covered with a lid 80 similar to the conventional case. ing.
- the configuration and operation of the diaphragm section 35 are the same as those of the fifth embodiment, and thus description thereof is omitted.
- the diaphragm 35 is formed on the surface facing the connector 22 ′, but the diaphragm 35 may be formed on any side of the body 20 ′.
- the diaphragm portion 35 can be formed not only on one side surface of the housing 20 'but also on a plurality of side surfaces. In this case, a larger pressure difference can be accommodated by the plurality of diaphragm portions 35.
- diaphragm portion 35 having a corrugated cross section may have a rectangular shape in FIG. 1 or a bellows in FIG.
- the diaphragm 35 is formed on the side surface of the housing 20 ′, the plurality of housings 20 are stacked or used while an object is placed on the upper surface of the housing 20 ′. Even in this case, the elastic deformation of the diaphragm 35 due to the pressure difference between the inside and outside is not hindered.
- FIG. 7 shows the outer surfaces of the diaphragms 34 ", 35, for example, to protect the diaphragms 34", 35 shown in FIGS. 5 and 6 (structurally weak against the action of external forces).
- FIG. 3 is a perspective view showing a vertical cross section of a state in which is covered with a protective cover 33 made of plastic or metal.
- a plurality of through holes 330 communicating with the outside are formed in the protective cover 33 so that the air pressure between the inside of the cover and the diaphragms 34 "and 35 does not change due to a change in temperature.
- the housing and the lid are formed of polybutylene terephthalate (PBT), polyphenylene sulfide (PPS), polyamide (PA), or the like. , Polycarbonate (PC) and the like can also be used.
- PBT polybutylene terephthalate
- PPS polyphenylene sulfide
- PA polyamide
- PC Polycarbonate
- the material for forming the diaphragm, elastomeric one, rubber, divorced like, the Young's modulus is suitable those having the elastic 10 3 MP a.
- the diaphragm when the diaphragm is formed separately from the lid as in the second and fourth embodiments, it is preferable that the diaphragm be formed of an elastomer or rubber that can be adhered to the lid made of plastic or metal. .
- the diaphragm and the lid must be integrally formed as in the first and third embodiments.
- the internal / external pressure difference generated by the heat and the internal / external temperature difference of the electric and electronic components fixed inside the airtight case 10, 12, 14, 16, 18, 180 is within the predictable range. It can be said that. Therefore, based on such knowledge, the material, thickness, size of the convex portions 44, 44 ', etc. of the diaphragm portions 34, 34', 34 "and the diaphragms 40, 400 are adjusted according to the use environment and use conditions. To set Can be.
- the hermetic case of the present invention has a structure in which the lid or the housing is provided with a diaphragm portion made of a flexible material or a diaphragm having a convex portion, so that the pressure inside and outside the case is increased. If a difference occurs, the diaphragm or the convex part of the diaphragm will be elastically deformed and the inner volume of the airtight case will change.Therefore, the pressure difference between the inside and the outside of the case must be reduced without communicating the inside and outside air of the case. Can be.
- an airtight case can be formed with a small number of parts.
- the lid or the housing and the diaphragm are formed separately, the lid or the housing and the diaphragm can be formed of different materials, and the rigidity of the airtight case is increased while increasing the flexibility of the diaphragm. It becomes possible.
- the diaphragm or the convex portion of the diaphragm is formed in a bellows shape, the range in which the inner volume of the hermetic case can be changed by a larger expansion and contraction of the bellows becomes larger, so that the range of the corresponding internal / external pressure difference becomes larger.
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- Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Casings For Electric Apparatus (AREA)
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CA002280841A CA2280841A1 (en) | 1997-12-09 | 1998-12-09 | An inner and outer pressure equalization structure for an airtight case |
EP98959140A EP0961534A4 (en) | 1997-12-09 | 1998-12-09 | PRESSURE BALANCING STRUCTURE FOR HERMETIC HOUSING |
US09/367,159 US6297448B1 (en) | 1997-12-09 | 1998-12-09 | Inner and outer pressure equalization structure for an airtight case |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP35400997 | 1997-12-09 | ||
JP9/354009 | 1997-12-09 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1999030544A1 true WO1999030544A1 (fr) | 1999-06-17 |
Family
ID=18434701
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP1998/005568 WO1999030544A1 (fr) | 1997-12-09 | 1998-12-09 | Structure d'equilibrage de pressions pour boitier hermetique |
Country Status (4)
Country | Link |
---|---|
US (1) | US6297448B1 (ja) |
EP (1) | EP0961534A4 (ja) |
CA (1) | CA2280841A1 (ja) |
WO (1) | WO1999030544A1 (ja) |
Cited By (3)
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EP0998177A3 (en) * | 1998-10-30 | 2001-01-31 | Bridgestone Corporation | Gasketed cover, cover for electronic equipment and process for producing the covers |
JP2014032186A (ja) * | 2012-07-12 | 2014-02-20 | Nippon Dengi Kk | 微差圧発信器及び空調システム |
JP5578253B1 (ja) * | 2013-04-05 | 2014-08-27 | 三菱電機株式会社 | 車載用防水型電子機器筐体 |
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- 1998-12-09 WO PCT/JP1998/005568 patent/WO1999030544A1/ja not_active Application Discontinuation
- 1998-12-09 US US09/367,159 patent/US6297448B1/en not_active Expired - Fee Related
- 1998-12-09 CA CA002280841A patent/CA2280841A1/en not_active Abandoned
- 1998-12-09 EP EP98959140A patent/EP0961534A4/en not_active Withdrawn
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EP0998177A3 (en) * | 1998-10-30 | 2001-01-31 | Bridgestone Corporation | Gasketed cover, cover for electronic equipment and process for producing the covers |
US6505839B1 (en) | 1998-10-30 | 2003-01-14 | Bridgestone Corporation | Gasketed cover, cover for electronic equipment and process for producing the covers |
JP2014032186A (ja) * | 2012-07-12 | 2014-02-20 | Nippon Dengi Kk | 微差圧発信器及び空調システム |
JP5578253B1 (ja) * | 2013-04-05 | 2014-08-27 | 三菱電機株式会社 | 車載用防水型電子機器筐体 |
Also Published As
Publication number | Publication date |
---|---|
CA2280841A1 (en) | 1999-06-17 |
US6297448B1 (en) | 2001-10-02 |
EP0961534A1 (en) | 1999-12-01 |
EP0961534A4 (en) | 2001-11-21 |
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