WO2022209590A1 - スイッチキー - Google Patents
スイッチキー Download PDFInfo
- Publication number
- WO2022209590A1 WO2022209590A1 PCT/JP2022/009478 JP2022009478W WO2022209590A1 WO 2022209590 A1 WO2022209590 A1 WO 2022209590A1 JP 2022009478 W JP2022009478 W JP 2022009478W WO 2022209590 A1 WO2022209590 A1 WO 2022209590A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- switch key
- inner diameter
- electrode
- columnar
- skirt
- Prior art date
Links
- 239000000758 substrate Substances 0.000 claims abstract description 36
- 230000004913 activation Effects 0.000 claims abstract description 14
- 239000013013 elastic material Substances 0.000 claims abstract description 9
- 229920002379 silicone rubber Polymers 0.000 claims description 26
- 239000004945 silicone rubber Substances 0.000 claims description 21
- 230000003213 activating effect Effects 0.000 claims description 6
- 238000000465 moulding Methods 0.000 claims description 4
- 238000005304 joining Methods 0.000 claims description 3
- -1 vinylmethylsiloxane Chemical class 0.000 description 55
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- 229920001577 copolymer Polymers 0.000 description 18
- 239000004205 dimethyl polysiloxane Substances 0.000 description 13
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- NYMPGSQKHIOWIO-UHFFFAOYSA-N hydroxy(diphenyl)silicon Chemical class C=1C=CC=CC=1[Si](O)C1=CC=CC=C1 NYMPGSQKHIOWIO-UHFFFAOYSA-N 0.000 description 4
- 230000000704 physical effect Effects 0.000 description 4
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- 239000003431 cross linking reagent Substances 0.000 description 3
- KPUWHANPEXNPJT-UHFFFAOYSA-N disiloxane Chemical class [SiH3]O[SiH3] KPUWHANPEXNPJT-UHFFFAOYSA-N 0.000 description 3
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- OMPJBNCRMGITSC-UHFFFAOYSA-N Benzoylperoxide Chemical compound C=1C=CC=CC=1C(=O)OOC(=O)C1=CC=CC=C1 OMPJBNCRMGITSC-UHFFFAOYSA-N 0.000 description 2
- 229920000181 Ethylene propylene rubber Polymers 0.000 description 2
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
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- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
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- OGZPYBBKQGPQNU-DABLZPOSSA-N (e)-n-[bis[[(e)-butan-2-ylideneamino]oxy]-methylsilyl]oxybutan-2-imine Chemical compound CC\C(C)=N\O[Si](C)(O\N=C(/C)CC)O\N=C(/C)CC OGZPYBBKQGPQNU-DABLZPOSSA-N 0.000 description 1
- 229940008841 1,6-hexamethylene diisocyanate Drugs 0.000 description 1
- ODBCKCWTWALFKM-UHFFFAOYSA-N 2,5-bis(tert-butylperoxy)-2,5-dimethylhex-3-yne Chemical compound CC(C)(C)OOC(C)(C)C#CC(C)(C)OOC(C)(C)C ODBCKCWTWALFKM-UHFFFAOYSA-N 0.000 description 1
- DMWVYCCGCQPJEA-UHFFFAOYSA-N 2,5-bis(tert-butylperoxy)-2,5-dimethylhexane Chemical compound CC(C)(C)OOC(C)(C)CCC(C)(C)OOC(C)(C)C DMWVYCCGCQPJEA-UHFFFAOYSA-N 0.000 description 1
- XMNIXWIUMCBBBL-UHFFFAOYSA-N 2-(2-phenylpropan-2-ylperoxy)propan-2-ylbenzene Chemical compound C=1C=CC=CC=1C(C)(C)OOC(C)(C)C1=CC=CC=C1 XMNIXWIUMCBBBL-UHFFFAOYSA-N 0.000 description 1
- KMNCBSZOIQAUFX-UHFFFAOYSA-N 2-ethoxy-1,2-diphenylethanone Chemical compound C=1C=CC=CC=1C(OCC)C(=O)C1=CC=CC=C1 KMNCBSZOIQAUFX-UHFFFAOYSA-N 0.000 description 1
- 239000004342 Benzoyl peroxide Substances 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 239000004971 Cross linker Substances 0.000 description 1
- 229920002943 EPDM rubber Polymers 0.000 description 1
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 description 1
- 239000005062 Polybutadiene Substances 0.000 description 1
- 229920002367 Polyisobutene Polymers 0.000 description 1
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 1
- BOTDANWDWHJENH-UHFFFAOYSA-N Tetraethyl orthosilicate Chemical compound CCO[Si](OCC)(OCC)OCC BOTDANWDWHJENH-UHFFFAOYSA-N 0.000 description 1
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 1
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- 230000006750 UV protection Effects 0.000 description 1
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 1
- NOZAQBYNLKNDRT-UHFFFAOYSA-N [diacetyloxy(ethenyl)silyl] acetate Chemical compound CC(=O)O[Si](OC(C)=O)(OC(C)=O)C=C NOZAQBYNLKNDRT-UHFFFAOYSA-N 0.000 description 1
- TVJPBVNWVPUZBM-UHFFFAOYSA-N [diacetyloxy(methyl)silyl] acetate Chemical compound CC(=O)O[Si](C)(OC(C)=O)OC(C)=O TVJPBVNWVPUZBM-UHFFFAOYSA-N 0.000 description 1
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- RWCCWEUUXYIKHB-UHFFFAOYSA-N benzophenone Chemical compound C=1C=CC=CC=1C(=O)C1=CC=CC=C1 RWCCWEUUXYIKHB-UHFFFAOYSA-N 0.000 description 1
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- ORBFAMHUKZLWSD-UHFFFAOYSA-N ethyl 2-(dimethylamino)benzoate Chemical compound CCOC(=O)C1=CC=CC=C1N(C)C ORBFAMHUKZLWSD-UHFFFAOYSA-N 0.000 description 1
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- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 description 1
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- HDNXAGOHLKHJOA-UHFFFAOYSA-N n-[bis(cyclohexylamino)-methylsilyl]cyclohexanamine Chemical compound C1CCCCC1N[Si](NC1CCCCC1)(C)NC1CCCCC1 HDNXAGOHLKHJOA-UHFFFAOYSA-N 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- JRZJOMJEPLMPRA-UHFFFAOYSA-N olefin Natural products CCCCCCCC=C JRZJOMJEPLMPRA-UHFFFAOYSA-N 0.000 description 1
- 229920006285 olefinic elastomer Polymers 0.000 description 1
- MMCOUVMKNAHQOY-UHFFFAOYSA-L oxido carbonate Chemical compound [O-]OC([O-])=O MMCOUVMKNAHQOY-UHFFFAOYSA-L 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 229920002857 polybutadiene Polymers 0.000 description 1
- 229920001083 polybutene Polymers 0.000 description 1
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- 238000004904 shortening Methods 0.000 description 1
- 125000005372 silanol group Chemical group 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
- 229920003048 styrene butadiene rubber Polymers 0.000 description 1
- CIHOLLKRGTVIJN-UHFFFAOYSA-N tert‐butyl hydroperoxide Chemical compound CC(C)(C)OO CIHOLLKRGTVIJN-UHFFFAOYSA-N 0.000 description 1
- ZQZCOBSUOFHDEE-UHFFFAOYSA-N tetrapropyl silicate Chemical compound CCCO[Si](OCCC)(OCCC)OCCC ZQZCOBSUOFHDEE-UHFFFAOYSA-N 0.000 description 1
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 description 1
- FOQJQXVUMYLJSU-UHFFFAOYSA-N triethoxy(1-triethoxysilylethyl)silane Chemical compound CCO[Si](OCC)(OCC)C(C)[Si](OCC)(OCC)OCC FOQJQXVUMYLJSU-UHFFFAOYSA-N 0.000 description 1
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 description 1
- 239000011701 zinc Substances 0.000 description 1
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- 239000011787 zinc oxide Substances 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H13/00—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch
- H01H13/02—Details
- H01H13/26—Snap-action arrangements depending upon deformation of elastic members
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H13/00—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch
- H01H13/50—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch having a single operating member
- H01H13/52—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch having a single operating member the contact returning to its original state immediately upon removal of operating force, e.g. bell-push switch
Definitions
- the present invention relates to a switch key used for a contact switch used for electrical signal input operation of electronic equipment mounted in automobiles, home appliances, and the like.
- a rubber switch key having a thick columnar push button and a movable contact on the back side thereof is used.
- the switch key is installed so that the movable contact portion faces a substrate electrode provided on a substrate or the like. According to such a contact switch, when the push button portion is pressed and the movable contact portion comes into contact with the substrate electrode such as the substrate, a click feeling can be felt. This click feeling is obtained from the switch key made of rubber, and the click feeling depends on the load characteristics of the switch key.
- Japanese Patent Application Laid-Open No. 2002-200002 describes adjusting the thickness of the skirt portion of the switch key and the angle of the skirt portion with respect to the push button portion within a predetermined range.
- An object of the present invention is to provide a switch key whose load characteristics can be adjusted even if the wall thickness and angle of the skirt portion are the same as those of conventional products.
- a switch key to achieve the above object is provided with a columnar portion having a lower surface facing a substrate electrode of a substrate to be mounted, and a columnar portion formed on the lower surface side of the columnar portion to abut on the substrate electrode and conduct.
- a starting electrode a starting electrode
- a skirt portion extending from the middle of the columnar portion and having an inner diameter that expands in a distal direction so as to surround the lower surface of the columnar portion
- a bottom portion having a space larger than the inner diameter of the hollow portion.
- the activation electrode is formed on the lower surface of the columnar portion.
- the activating electrode is an activating electrode having a spring characteristic formed between the bottom surface of the columnar portion and the substrate electrode, wherein the activation electrode is pressed against the bottom surface of the columnar portion and comes into contact with the substrate electrode. can be used.
- the inner diameter ( ⁇ 2) of the space portion is larger than the inner diameter ( ⁇ 1) of the hollow portion, and the ratio of the inner diameter ( ⁇ 2) to the inner diameter ( ⁇ 1) (( ⁇ 2/ ⁇ 1) ⁇ 100) is 110. It is preferable that the load characteristic of the switch key is easily controlled when it is up to 200%.
- the ratio of the height (h2) of the space portion to the total height (H) of the height (h1) of the cylindrical portion and the height (h2) of the space portion ((h2/H)) ⁇ 100) is preferably 2 to 50% because the load characteristic of the switch key can be easily adjusted.
- the columnar portion, the skirt portion and the base portion are made of an elastic material.
- the elastic material is silicone rubber.
- the base portion is formed by joining or integrally molding the cylindrical portion and the bottom portion.
- the columnar portion, the skirt portion and the base portion are integrally formed.
- the switch key according to the present invention can adjust the load characteristics without adjusting the thickness or angle of the skirt.
- FIG. 1 is a sectional view of a contact switch using a switch key to which the present invention is applied;
- FIG. 1A and 1B are a perspective view and a sectional view of a switch key to which the present invention is applied;
- FIG. FIG. 4 is a cross-sectional view showing a graph showing characteristics of a switch key to which the present invention is applied and a corresponding state;
- 1 is a cross-sectional view of two types of switch keys to which the present invention is applied and graphs showing their characteristics;
- FIG. 4 is a cross-sectional view showing another aspect of a switch key to which the present invention is applied;
- FIG. 4 is a cross-sectional view showing another aspect of a switch key to which the present invention is applied;
- FIG. 4 is a cross-sectional view showing another aspect of a switch key to which the present invention is applied;
- 4 is a cross-sectional view of another contact switch using a switch key to which the present invention is applied; 4 is a graph showing measurement results of an example and a reference example of a switch key to which the present invention is applied; 7 is a graph showing measurement results of another example of a switch key to which the present invention is applied; 7 is a graph showing measurement results of another example of a switch key to which the present invention is applied;
- FIG. 1 A cross-sectional view showing a contact switch using a switch key to which the present invention is applied is shown in FIG.
- the switch key 10 shown in FIG. 1 is formed of an elastic material, and an activation electrode 18 is formed on the lower surface facing the substrate electrodes 24, 24 formed on the exposed surface exposed from the insulating coating 26 of the mounted substrate 22.
- a skirt portion 14 extending obliquely from the middle of the columnar portion 12 and having an inner diameter expanding in the distal direction so as to surround the lower portion of the columnar portion 12 including the starting electrode 18;
- a tip and a joined base 16 are provided.
- the base portion 16 is joined to the skirt portion 14 and has a tubular portion 16a having a hollow portion 17a with an inner diameter equal to the maximum inner diameter of the skirt portion 14 and a space portion 17b having a larger diameter than the inner diameter of the hollow portion 17a. and a bottom portion 16b.
- a concave groove 15 is formed at the boundary between the skirt portion 14 and the cylindrical portion 16a so that the skirt portion 14 can be formed long.
- An air hole 20 for discharging or sucking air into the space inside the switch key 10 is formed in the inner wall surface of the space 16b.
- the upper surface of this columnar portion 12 is in contact with the bottom surface of a button 28 whose head protrudes from the operation panel 27 . 18 and the substrate electrodes 24, 24 of the substrate 22 can be in contact.
- FIG. 2(a) A perspective view of the switch key 10 shown in FIG. 1 is shown in FIG. 2(a), and a cross-sectional view thereof is shown in FIG. 2(b).
- the columnar portion 12, the skirt portion 14 and the base portion 16 are circular, and the base portion 16 has an air hole 20 on its outer peripheral surface.
- FIG. 2B which is a cross-sectional view thereof, the ratio of the inner diameter ( ⁇ 1) of the hollow portion 17a of the cylindrical portion 16a constituting the base portion 16 to the inner diameter ( ⁇ 2) of the space portion 17b (( ⁇ 2/ ⁇ 1 ) ⁇ 100) is 110 to 200%, preferably 120 to 180%, so that the load characteristic of the switch key 10 can be easily controlled. If the ⁇ 2/ ⁇ 1 ratio is less than 110%, the load characteristics of the switch key tend to change less. , the load characteristics tend to be difficult to control.
- FIG. 3 shows changes in the switch key 10 when a load is applied to the upper surface of the columnar portion 12 of the switch key 10 shown in FIGS.
- the graph of FIG. 3(a) is a graph showing the relationship between the load applied to the columnar portion 12 of the switch key 10 and the stroke of the columnar portion 12, and FIGS. is a sectional view showing the state of the switch key 10 at points P0 , P and B of the graph of FIG.
- the skirt portion 14 extends diagonally downward from the middle of the columnar portion 12 as shown in FIG. 3(b). Inclined.
- the skirt portion 14 buckles and bends into the hollow portion 16a and the space portion 16b as shown in FIG.
- the applied load abruptly drops to point B, which is the bottom point.
- point B the starting electrode 18 formed on the lower surface of the columnar portion 12 and the substrate electrodes 24, 24 of the substrate 22 come into contact with each other.
- the load applied to the columnar portion 12 increases rapidly.
- the stroke of the columnar portion 12 moves through the route indicated by the dashed line in FIG. It returns to the state of (b).
- the route indicated by the dashed line is based on the hysteresis of the elastic member.
- the switch key 10 shown in FIG. 4A which is similar to the switch key 10 shown in FIGS. ) is constant, and the ratio ( ⁇ 2/ ⁇ 1) between the inner diameter ( ⁇ 1) of the hollow portion 17a of the cylindrical portion 16a and the inner diameter ( ⁇ 2) of the space portion 17b of the bottom portion 16b is changed. It is shown in the lower part of FIG. 4(a).
- the ( ⁇ 2/ ⁇ 1) ratio of switch key 10 indicated by curve 10B is greater than that of switch key 10 indicated by curve 10A.
- point P where the maximum load is applied shifts to point P' where the load is slightly reduced and the stroke is lengthened.
- the projecting portion of the cylindrical portion 16a is flexed, so the distance between the starting electrode 18 on the lower surface of the columnar portion 12 and the plate 30 is also shortened, and the starting electrode 18 is Reduction of the load until contact with the plate 30 is also reduced.
- the inner diameter ( ⁇ 1) of the hollow portion 17a of the cylindrical portion 16a and the inner diameter ( ⁇ 2) of the space portion 17b of the bottom portion 16b are made equal.
- a load-stroke graph is shown at the bottom of FIG. 4(b) when only the height (h2) of the space 17b of the bottom portion 16b is changed for the switch key 10 shown in FIG. 4(b).
- the height (h2) of the space 17b of the switch key 10 indicated by the curve 10D is higher than the height (h2) of the space 17b of the switch key 10 indicated by the curve 10C.
- the switch key 10 of the curve 10D and the switch key 10 of the curve 10C have points P and P' at approximately the same position, but the height (h2) of the space 17b is increased.
- the point B' of the switch key 10 on the curved line 10D has a reduced load and a longer stroke than the point B of the switch key 10 on the curved line 10C.
- Point P which is the maximum load at which buckling occurs, is the same value even if the height (h2) of the space portion 17b is changed. Further, when buckling occurs in the skirt portion 14, the distance between the starting electrode 18 on the lower surface of the columnar portion 12 and the plate 30 increases as the height (h2) of the space portion 17b increases, so that the stroke becomes longer. and the reduction in load is also large.
- the switch key 10 shown in FIG. The descending curve of the curve from to point B is asymmetrical with respect to the straight line passing through the point P, and compared to the rate of increase in the load applied to the columnar portion 12 between the point P 0 and point P , the rate of decrease in the load applied to the columnar portion 12 between points P0 and B is rapid, and the stroke from point P to point B can be reduced.
- the activation electrode 18 contacts the substrate electrodes 24, 24 and conducts, thereby activating the switch. Therefore, since the stroke between the P point and the B point is short as in the switch key 10, the stroke for electrical conduction is shortened, and the switch key is rapidly deformed, so that the load characteristics of a metal disc spring are obtained. It can provide a switch that can be expressed.
- the switch key 10 shown in FIG. It is symmetrical, and the rate of increase in the load applied to the columnar section 12 between points P0 and P and the rate of decrease in the load applied to the columnar section 12 between points P and B are substantially balanced. Therefore, the switch key 10 shown in FIG. 4(b) cannot shorten the stroke from point P to point B as much as the switch key 10 shown in FIG. 4(a). However, even with the switch key 10 shown in FIG. 4(b), the load characteristic can be easily changed by changing the height h2 of the space 17b, so that a contact switch with a desired click feeling can be provided.
- silicone rubber or olefin rubber can be used from the viewpoint of electrical properties, durability, and the like.
- silicone rubber can be preferably used.
- the silicone rubber mainly peroxide cross-linking silicone rubber, addition cross-linking silicone rubber, condensation cross-linking silicone rubber, and UV cross-linking silicone rubber are put into a molding die or the like and cross-linked to form a switch key of a predetermined shape. 10 can be molded. Further, the hardness of the rubber can be 10 to 90 degrees, preferably 40 to 80 degrees for dual meter type A (Shore A), and the rubber hardness may be changed for each part.
- the peroxide cross-linkable silicone rubber is not particularly limited as long as it is synthesized using a silicone raw material compound that can be crosslinked with a peroxide cross-linking agent.
- vinylmethylsiloxane/polydimethylsiloxane copolymer molecular weight: 500,000 to 900,000
- vinyl-terminated polydimethylsiloxane molecular weight: 10,000 to 200,000
- vinyl-terminated diphenylsiloxane/polydimethylsiloxane copolymer molecular weight: 10,000 to 100,000
- vinyl-terminated diethylsiloxane/polydimethylsiloxane copolymer molecular weight: 10,000-50,000
- vinyl-terminated trifluoropropylmethylsiloxane/polydimethylsiloxane copolymer molecular weight: 10,000-100,000
- vinyl-terminated polyphenylmethyl Siloxane molecular weight: 01,000 to 10,000
- Peroxide cross-linking agents include, for example, ketone peroxides, diacyl peroxides, hydroperoxides, dialkyl peroxides, peroxyketals, alkyl peresters, and percarbonates, and more specifically, , ketone peroxide, peroxyketal, hydroperoxide, dialkyl peroxide, peroxycarbonate, peroxyester, benzoyl peroxide, dicumyl peroxide, dibenzoyl peroxide, t-butyl hydroperoxide, di-t-butyl hydroperoxide oxide, di(dicyclobenzoyl) peroxide, 2,5-dimethyl-2,5 bis(t-butylperoxy)hexane, 2,5-dimethyl-2,5 bis(t-butylperoxy)hexyne, benzophenone, Mihira arketone , dimethylaminobenzoic acid ethyl ester, and benzoin ethyl ether
- the amount of the peroxide-based cross-linking agent to be used is appropriately selected according to the type of silicone rubber to be obtained, the properties and performance of the substrate 22 to be mounted and the material of the insulating coating 26, but the amount is 0 per 100 parts of the silicone rubber. 0.01 to 10 parts, preferably 0.1 to 2 parts are preferably used. If the amount is less than this range, the degree of cross-linking is too low to be used as a silicone rubber. On the other hand, if the amount is more than this range, the degree of cross-linking is too high and the elasticity of the silicone rubber is reduced.
- Addition-type silicone rubbers include vinylmethylsiloxane/polydimethylsiloxane copolymer (molecular weight: 500,000 to 900,000) synthesized in the presence of Pt catalyst, vinyl-terminated polydimethylsiloxane (molecular weight: 10,000 to 200,000), and vinyl-terminated diphenylsiloxane.
- compositions such as aminopropyl-terminated polydimethylsiloxane, aminopropylmethylsiloxane/dimethylsiloxane copolymer, aminoethylaminoisobutylmethylsiloxane/dimethylsiloxane copolymer, aminoethylaminopropylmethoxysiloxane/dimethylsiloxane copolymer, dimethylamino-terminated polydimethylsiloxane Amino group-containing polysiloxanes and epoxy group-containing polysiloxanes such as epoxypropyl-terminated polydimethylsiloxanes, (epoxycyclohexylethyl)methylsiloxane/dimethylsiloxane copolymers, and acid anhydride group-containing polysiloxanes such as succinic anhydride-terminated polydimethylsiloxanes. It is obtained from a composition of polysiloxane and an is
- the processing conditions for preparing addition-type silicone rubbers from these compositions vary depending on the type and characteristics of the addition reaction and cannot be unambiguously determined. It is. If the physical properties of the silicone rubber are better under low temperature processing conditions, the reaction time will be longer. When rapid productivity is required rather than physical properties, high temperature and short processing conditions are used. When processing must be performed within a certain period of time due to the production process or work environment, the processing temperature is set to a relatively high temperature within the above range according to the desired processing time.
- Condensation type silicone rubbers are silanol-terminated polydimethylsiloxanes (molecular weight: 05,000 to 200,000) synthesized in the presence of tin-based catalysts or zinc-based catalysts, silanol-terminated polydiphenylsiloxanes, and silanol-terminated polytrifluoromethylsiloxanes.
- silanol-terminated diphenylsiloxane/dimethylsiloxane copolymers silanol-terminated diphenylsiloxane/dimethylsiloxane copolymers; compositions of single condensation components comprising silanol-terminated polysiloxanes such as silanol-terminated diphenylsiloxane/dimethylsiloxane copolymers; silane, vinyltriacetoxysilane, tetraethoxysilane, trienoxymethylsilane, Bis(triethoxysilyl)ethane, tetra-n-propoxysilane, vinyltrimethoxysilane, methyltris(methylethylketoxime)silane, vinyltris(methylethylketoxyimino)silane, vinyltriisopropenooxysilane, triacetoxymethylsilane, tri( with crosslinkers such as ethylmethyl)oxime
- the processing conditions for preparing silicone rubbers from these compositions cannot be unambiguously determined because they differ depending on the type and characteristics of the condensation reaction, but generally they are heated at 0 to 200°C for 10 minutes to 24 hours. be. If the physical properties of the silicone rubber are better under low temperature processing conditions, the reaction time will be longer. When rapid productivity is required rather than physical properties, high temperature and short processing conditions are used. When processing must be performed within a certain period of time due to the production process or work environment, the processing temperature is set to a relatively high temperature within the above range according to the desired processing time.
- Olefinic rubbers include 1,4-cis-butadiene rubber, isoprene rubber, styrene-butadiene copolymer rubber, polybutene rubber, polyisobutylene rubber, ethylene-propylene rubber, ethylene-propylene-diene rubber, chlorinated ethylene-propylene rubber, and chlorinated butyl rubber. is mentioned.
- Functionality is added to the switch key 10 in order to enhance functions such as reinforcement as an elastic body, insulation, thermal conductivity, abrasion resistance, ultraviolet resistance, radiation resistance, heat resistance, weather resistance, flexibility, and antibacterial properties. Functional fillers may be added to add or extend the agent. Also, the switch key 10 may be made of a material containing these silicone rubbers.
- the activation electrode 18 formed on the columnar portion 12 of the switch key 10 may be made of a conductive material such as carbon, conductive polymer, and conductive metal oxide, in addition to metal. Also, the starting electrode 18 may be made of the same material as the columnar portion 12 by molding silicone rubber mixed with a conductive material.
- the conductive material include metal powders such as gold, silver, copper and nickel powders, carbon powders such as graphite, CNT (carbon nanotubes) and carbon black, metal oxide powders such as zinc oxide and titanium oxide, and metal powders. Silica powder plated with metal and glass beads plated with metal can be mentioned.
- the gap 44 surrounded by the columnar portion 12 and the skirt portion 14 has a triangular cross-sectional shape. good.
- the switch key 10 shown in FIGS. 1 to 5 has a columnar portion 12, a skirt portion 14, and a tubular portion 16a which are formed integrally with a bottom portion 16b formed separately. As shown, the columnar portion 12, the skirt portion 14 and the base portion 16 may be formed integrally. Furthermore, although the switch key 10 shown in FIGS. 1 to 6 has a circular shape, it may have an elliptical shape or a triangular shape, and a plurality of them may be formed on the sheet-like base. 1 to 6, the drive electrode 18 is formed on the lower surface of the columnar portion 12.
- a dome-shaped actuation electrode 19 having a spring characteristic may be formed on the .
- the dome-shaped activation electrode 19 is made of metal, and when the button 28 is pressed with a finger, the lower surface of the columnar portion 12 presses the dome-shaped activation electrode 19 and can come into contact with the substrate electrodes 24 , 24 of the substrate 22 .
- a metallic leaf spring-like starting electrode can be used instead of the dome-shaped starting electrode 19, a metallic leaf spring-like starting electrode can be used.
- Example 1 First, the columnar portion 12, the skirt portion 14, and the cylindrical portion 16 were integrally molded with silicone rubber.
- silicone rubber a silicone rubber mixture of 100 parts by mass of KE961U (manufactured by Shin-Etsu Chemical Co., Ltd.) and 0.5 parts by mass of C-8A (manufactured by Shin-Etsu Chemical Co., Ltd.) as a vulcanizing agent was used.
- a switch key was produced by joining a bottom part 16b made of the same silicone rubber as the integrally molded body to the cylindrical part 16a of the integrally molded body with an adhesive.
- the inner diameter ⁇ 2 of the space portion 17b is the same as the inner diameter ⁇ 1 of the hollow portion 17a
- the height h2 of the space portion 17b is a predetermined height.
- the switch key with the inner diameter ⁇ 1 of the hollow portion 17a and the inner diameter ⁇ 2 of the space portion 17b having the same diameter ⁇ 2 and the height h2 of the bottom portion 16b is changed. It is the same curve, and point P is also at substantially the same load and stroke.
- the load at point B decreases and the stroke shifts toward a longer stroke, so that a switch key with load characteristics that widens the distance between points P and B can be provided.
- Example 2 The inner diameter ⁇ 2 of the space portion 17b is set to 6.5 mm ( ⁇ 1/ ⁇ 2 ratio: 140%), and the bottom portion 16b to be bonded to the cylindrical portion 16a of the integrally molded body prepared in Example 1 is set to 6.5 mm.
- Switch keys were prepared by changing the height h2 of the (h2/H) ratio to 12%, 21%, and 29%. For each of these switch keys, the amount of sinking of the columnar portion 12 was measured by changing the load applied to the upper surface of the columnar portion 12 in the same manner as in Example 1.
- Example 3 The thickness of the bottom portion 16b, which is joined to the cylindrical portion 16a of the integrally molded body prepared in Example 1 with an adhesive, is set to 0.5 mm (height h2 of the space portion 17b: 0.5 mm).
- the switch key 10 was produced by changing the ratio of the inner diameter ⁇ 2 to the inner diameter ⁇ 1 of the hollow portion 16a ( ⁇ 2/ ⁇ 1) to 120%, 140%, and 170%. For each of these switch keys 10, the sinking amount of the columnar portion 12 was measured by changing the load applied to the upper surface of the columnar portion 12 in the same manner as in Example 1. FIG. These results are shown in FIG.
- a contact switch using a switch key according to the present invention can be used for panels of automobiles, electric appliances, and the like.
- ⁇ 1 inner diameter of hollow portion 17a of cylindrical portion 16a
- ⁇ 2 inner diameter of space portion 17b of bottom portion 16b
- 10 switch key
- 12 columnar portion
- 14 skirt portion
- 15 concave groove
- 16 base portion
- 16a Cylindrical portion 17a: Hollow portion 16b: Bottom portion 17b: Space portion 18: Starting electrode 19: Dome-shaped starting electrode 20: Air hole 22: Substrate 24: Substrate electrode 26: Insulating coating , 27: operation panel, 28: button, 30: plate, 44: gap
Landscapes
- Push-Button Switches (AREA)
Abstract
Description
このクリック感は、ゴム製のスイッチキーにより得られるものであり、クリック感はスイッチキーの荷重特性に左右される。特許文献1では、スイッチキーのスカート部の肉厚や押しボタン部に対するスカート部の角度を所定範囲に調整することが記載されている。
また、ゴムの硬度は、デュアルメータタイプA(ショアA)で10~90度、好ましくは40~80度を用いることができ、各部ごとにゴム硬度を変えてもよい。
ビス(トリエトキシシリル)エタン、テトラ-n-プロポキシシラン、ビニルトリメトキシシラン、メチルトリス(メチルエチルケトキシム)シラン、ビニルトリス(メチルエチルケトキシイミノ)シラン、ビニルトリイソプロペノイキシシラン、トリアセトキシメチルシラン、トリ(エチルメチル)オキシムメチルシラン、ビス(N-メチルベンゾアミド)エトキシメチルシラン、トリス(シクロヘキシルアミノ)メチルシラン、トリアセトアミドメチルシラン、トリジメチルアミノメチルシランのような架橋剤との組成物;これらのシラノール基末端ポリシロキサンと、クロル末端ポリジメチルシロキサン、ジアセトキシメチル末端ポリジメチルシロキサン、末端ポリシロキサンのような末端ブロックポリシロキサンの組成物から得られるものである。
また、図1~図6に示すスイッチキー10は、柱状部12の下面に駆動電極18が形成されていたが、図7に示すように柱状部12の下面と基板電極24,24との間にバネ特性を有するドーム状起動電極19を形成してもよい。この場合、柱状部12の下面に駆動電極を形成することは要しない。ドーム状起動電極19は、金属製であって、指でボタン28を押圧することにより、柱状部12の下面がドーム状起動電極19を押圧して基板22の基板電極24,24と接触できる。ドーム状起動電極19に代えて、金属製の板ばね状起動電極を用いることができる。
先ず、シリコーンゴムで柱状部12とスカート部14と筒状部16とを一体成形した。このシリコーンゴムとしては、KE961U(信越化学工業株式会社製)の100質量部と、加硫剤としてC-8A(信越化学工業株式会社製)0.5質量部とのシリコーンゴム混合物を用いた。形成した筒状部16aの中空部17aの内径φ1は4.6mmであり、その高さh1=Hとなり1.5mmである。
この柱状部12とスカート部14と筒状部16aとの一体成形体のみのスイッチキー(h2/H比が0%)について、柱状部12の上面に所定の荷重を加えたとき、柱状部12の沈み込み量をストロークとして測定した。荷重を変更して柱状部12の沈み込み量を測定した。その結果を図8に参考例として示す。
実施例1で作成した一体成形体の筒状部16aに接着剤で接合するボトム部16bを、空間部17bの内径φ2を6.5mm(φ1/φ2比:140%)とし、且つ空間部16bの高さh2を(h2/H)比が12%,21%,29%となるように変更したスイッチキーを作成した。これら各スイッチキーについても、実施例1と同様にして柱状部12の上面に加える荷重を変更して柱状部12の沈み込み量を測定した。これらの結果を図9に示す。
実施例1で作成した一体成形体の筒状部16aに接着剤で接合するボトム部16bを、厚さを0.5mm(空間部17bの高さh2:0.5mm)とし、空間部17bの内径φ2を中空部16aの内径φ1との比(φ2/φ1)が、120%、140%、170%となるように変更したスイッチキー10を作成した。これらスイッチキー10の各々について、実施例1と同様にして柱状部12の上面に加える荷重を変更して柱状部12の沈み込み量を測定した。これらの結果を図10に示す。
Claims (9)
- 装着される基板の基板電極に下面が対向する柱状部と、前記柱状部の前記下面側に形成され、前記基板電極に当接して導通する起動電極と、前記柱状部の途中から延出され、前記柱状部の前記下面を取り囲むように先端方向に内径が拡大するスカート部と、前記スカート部の先端と接合され、前記スカート部の最大内径と等しい内径の中空部が形成された筒状部と、前記中空部の内径と同径以上の空間部が形成されたボトム部とから構成される基部とが設けられ、
前記柱状部の上面が押圧されたとき、前記スカート部が前記中空部内方向に変形して前記柱状部の前記下面が前記中空部及び前記空間部を通過して、前記下面側に形成された前記起動電極が前記基板電極に当接し、前記押圧が解除されたとき、前記基板電極と前記起動電極とが離れるように、前記筒状部よりも薄肉に形成された前記スカート部及び前記筒状部が弾性材料で形成されていることを特徴とするスイッチキー。 - 前記起動電極が、前記柱状部の前記下面に形成されていることを特徴とする請求項1に記載のスイッチキー。
- 前記起動電極が、前記柱状部の前記下面と前記基板電極との間に形成されたバネ特性を有する起動電極であって、前記柱状部の前記下面に押圧されて、前記基板電極と当接することを特徴とする請求項1に記載のスイッチキー。
- 前記空間部の内径(φ2)が前記中空部の内径(φ1)よりも大径であって、前記内径(φ2)と前記内径(φ1)との比((φ2/φ1)×100)が110~200%であることを特徴とする請求項1~3のいずれかに記載のスイッチキー。
- 前記空間部の高さ(h2)と、前記筒状部の高さ(h1)と前記空間部の高さ(h2)との合計である高さ(H)との比((h2/H)×100)が2~50%であることを特徴とする請求項1~4のいずれかに記載のスイッチキー。
- 前記柱状部、前記スカート部及び前記基部が、弾性材料で形成されていることを特徴とする請求項1~5のいずれかに記載のスイッチキー。
- 前記弾性材料が、シリコーンゴムであることを特徴とする請求項1~6のいずれかに記載のスイッチキー。
- 前記基部が、前記筒状部と前記ボトム部とが接合又は一体成形されて形成されていることを特徴とする請求項1~7のいずれかに記載のスイッチキー。
- 前記柱状部、前記スカート部及び前記基部が一体成形されていることを特徴とする請求項1~8のいずれかに記載のスイッチキー。
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Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH11339593A (ja) * | 1998-05-29 | 1999-12-10 | Shin Etsu Polymer Co Ltd | 押釦スイッチ装置 |
JP2003281967A (ja) * | 2002-03-25 | 2003-10-03 | Alps Electric Co Ltd | 押釦スイッチ用可動接点体およびこれを用いたスイッチ装置 |
JP2005032487A (ja) * | 2003-07-09 | 2005-02-03 | Alps Electric Co Ltd | 押釦スイッチ用反転ばね及びこれを用いた押釦スイッチ |
WO2007091418A1 (ja) * | 2006-02-08 | 2007-08-16 | Covac Co., Ltd | 消音スイッチ |
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Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH11339593A (ja) * | 1998-05-29 | 1999-12-10 | Shin Etsu Polymer Co Ltd | 押釦スイッチ装置 |
JP2003281967A (ja) * | 2002-03-25 | 2003-10-03 | Alps Electric Co Ltd | 押釦スイッチ用可動接点体およびこれを用いたスイッチ装置 |
JP2005032487A (ja) * | 2003-07-09 | 2005-02-03 | Alps Electric Co Ltd | 押釦スイッチ用反転ばね及びこれを用いた押釦スイッチ |
WO2007091418A1 (ja) * | 2006-02-08 | 2007-08-16 | Covac Co., Ltd | 消音スイッチ |
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