(19) Japan Patent Office (JP)
`(12) Japanese Unexamined Patent
`Application Publication (A)
`
`(11) Japanese Unexamined Patent
`Application Publication
`S54–38648
`
`Identification
`codes
`
`(51) Int. Cl.2
`
`E 06B 9/322
`
`
`
`
`
`
`
`(52) Japanese
`classification
`89(2) D 411
`
`
`
`
`
`
`JPO file numbers
`
`(43) Published: March 23, 1979
`
`7369–2E
`
`
`Number of inventions: 1
`Request for Examination: requested
`
`(Total of 4 pages)
`
`(71) Applicant Tachikawa Blind Kogyo K.K., 30-7
`
`Yoyogi 4-chome, Shibuya-ku, Tokyo-to
`
`
`(74) Agent
`Patent attorney TANROKU, Ryoji and 1
`
`other
`
`
`
`
`
`2
`torque in the opposite direction and identical to the
`torque due to the load of the blinds acting upon the
`operating shaft, which has the effect that the force
`for manipulating the operating shaft in order to
`perform roll-up and roll-down of the blinds can be
`a: small, constant force regardless of the position
`of the blinds, and that the blinds do not fall
`spontaneously due to the weight of the blinds if
`roll-up is stopped mid-way, but are rather stopped
`at that position by the spring torque.
`embodiment
`Regarding
`the
`illustrated
`is mounted
`example, an operating shaft 2
`horizontally on the upper case 1 of the venetian
`blinds, tapes 4, 4 are wound onto drums 3, 3
`attached to multiple locations on the operating
`shaft 2, and each tape 4 is passed through through-
`holes in the slats 5, 5 of the blinds and is coupled
`to lower case 6. A bevel gear 7 is attached to one
`end of operating shaft 2, a chain pulley 10 is fixed
`to drive shaft 9 of bevel gear 8 which engages with
`bevel gear 7, and an endless chain 11 is hung on
`chain pulley 10 and suspended downward.
`
`123456789
`
`10
`11
`12
`13
`14
`15
`16
`17
`18
`19
`20
`21
`22
`
`(54) Venetian blinds roll-up device
`
`(21) Japanese patent application S52-105456
`(22) Filed
`September 2, 1977
`
`(72) Inventor TACHIKAWA, Takeyoshi
`
`c/o Tachikawa Blind Kogyo K.K., 30-7
`
`Yoyogi 4-chome, Shibuya-ku, Tokyo-to
`1
`SPECIFICATION
`
`1. TITLE OF THE INVENTION
`Venetian blinds roll-up device
`2. SCOPE OF PATENT CLAIMS
`A venetian blinds roll-up device characterized
`in that a constant force spring is mounted on a
`drive shaft or operating shaft for performing the
`rolling up of venetian blinds, and the radius of
`curvature of the constant force spring is changed
`in response to the gradually increasing change
`in the load as the blinds are rolled up, so as to
`constantly generate a spring torque corresponding
`to the load of the blinds.
`3. DETAILED DESCRIPTION OF THE INVENTION
`When venetians blinds are rolled up by turning
`the operating shaft of the blinds by means of a gear
`mechanism or the like, the load increases gradually
`as the roll-up progresses, and conversely when the
`blinds are rolled down, the load becomes smaller
`as the roll-down progresses. Therefore, the force
`necessary to manipulate the operating shaft of the
`blinds is not constant and changes ceaselessly.
`The present invention relates to a venetian
`blinds roll-up device characterized in that a
`constant force spring is mounted on the operating
`shaft of the venetian blinds, and the radius of
`curvature of the constant force spring is changed in
`response to the change in load as the blinds are
`rolled up, so as to constantly generate a spring
`
`123456789
`
`10
`11
`12
`13
`14
`15
`16
`17
`18
`19
`20
`21
`22
`23
`24
`25
`26
`27
`28
`
`-209-
`
`Norman Int. Exhibit 1002
`
`

`
`3
`Conventional venetian blinds are configured as
`described above, whereby one side of chain 11 is
`pulled to tum the chain pulley 10, the operating
`shaft 2
`is
`turned
`through engagement and
`interlocking of the bevel gears 8 and 7, drums 3, 3
`tum in one direction to pull up the lower case 6 for
`example by winding tapes 4 around the drums 3,
`and the slats 5, 5 are sequentially stacked on the
`lower case 6 and rolled up. Therefore, at the start
`of the roll-up, there is only the load of the lower
`case 6, but as the roll-up progresses, the load of the
`slats 5 is applied, so the torque to be applied in
`order to tum the operating shaft 2 is not constant
`and changes ceaselessly.
`In the present invention, regardless of loads,
`for the purpose of performing the turning of the
`operating shaft 2 with a small constant force, as
`shown in FIG. 1 and FIG. 2, a constant force
`spring is mounted on the operating shaft 2, or as
`shown in FIG. 3 and FIG. 4, a constant force
`spring is mounted on drive shaft 9 which turns the
`operating shaft 2. In FIG. 2, support plate 12 is
`mounted inside the upper case 1, a shaft tube 13,
`which allows the operating shaft 2 to pass through
`and wedges it in place is secured to the support
`plate 12 (FIG. 6), and a constant force spring 17 is
`wound diagonally between drum 14 fixed to shaft
`tube 13 and drum 16 which is rotatably axially
`fitted onto center shaft 15 provided on support
`plate 12. Thus, in response to the torque of turning
`the operating shaft 2 based on the load P as the
`blinds are rolled up to the uppermost end, as
`shown in FIG. 9, the constant force spring 17 is
`made to produce a torque T in the opposite
`direction and identical to the torque due to the load
`P by making curvature radius R small at the
`starting end wound onto drum 14, as shown in
`FIG. 8, and as the blinds are rolled down, the load
`P decreases gradually, changing gradually to load
`p when
`the blinds are rolled down
`to
`the
`lowermost end, while the curvature radius of the
`constant force spring 17 is gradually increased
`from the curvature radius R of the starting end to
`the curvature radius r of the terminal end shown in
`FIG. 7, so that a spring torque t in the opposite
`direction and identical to the torque on the
`operating shaft 2 due to load p is generated at the
`terminal end.
`When a constant force spring 17 of this sort is
`installed, it suffices to apply a small constant force
`in order to manipulate the endless chain 11 via
`bevel gears 7, 8 in order to tum the operating shaft
`2, and if the manipulation of the endless chain 11
`
`Japanese Unexamined Patent Application Publication S54–38648 (4)
`4
`is stopped mid-way during roll-up or roll-down of
`the blinds, the torque of the blinds descending
`under their own weight will be balanced out by an
`identical spring torque in the opposite direction
`due to the constant force spring, so the blinds will
`stop at the mid-way position.
`It will be noted that while it is ideal to change
`the radius of curvature of the constant force spring
`17 in response to change in load of the blinds such
`that its torque changes gradually from torque T to
`torque t, as shown in FIG. 9, there is no practical
`impediment to employing a constant force spring
`machined such
`that
`the radius of curvature
`becomes a fixed (value) R so as to provide a spring
`torque P in a suitable range from the starting end,
`and whereof the radius of curvature becomes a
`fixed (value) r so as to provide a spring torque p at
`the terminal end, as shown by the dashed line in
`FIG. 9.
`The effect of the constant force spring 17 in
`FIG. 3 and FIG. 4, where it is mounted on drive
`shaft 9, is the same as above, and the constant
`force spring 17 can simply be wound diagonally
`between drum 14 fixed to drive shaft 9 and drum
`16, which is rotatably axially fitted onto center
`shaft 15.
`4. BRIEF DESCRIPTION OF THE DRAWINGS
`FIG. 1 is a plan view of venetian blinds
`embodying the present invention; FIG. 2 is a
`vertical front cross-sectional view sectioned along
`line A-A of FIG. 1; FIG. 3 is a partial plan view of
`an embodiment example in which a constant force
`spring is mounted on the drive shaft of the
`venetian blinds; FIG. 4 is a partial front view
`vertically sectioned along line B-B of FIG. 3; FIG.
`5 is a perspective view of a constant force spring;
`FIG. 6 is a vertical cross-sectional view along C-C
`of FIG. 5; FIG. 7 is a front view showing the state
`of the constant force spring at the position where
`the blinds have been fully lowered; FIG. 8 is a
`front view showing the state of the constant force
`spring at the position where the blinds have been
`fully raised and their load is the greatest; FIG. 9 is
`a graph showing the change in load of the blinds
`and the change in spring torque of the constant
`force spring.
`1 ... upper case of blinds; 2 ··· operating shaft;
`3 ... drum; 4 ... tape; 5 ... slat; 6 ... lower case; 7,8
`··· bevel gear; 9 ··· drive shaft; 10 ··· chain pulley;
`11 ... endless chain; 12 ··· support plate; 13 ···
`shaft tube; 14 ·· · drum; 15 ··· center shaft; 16 · ··
`drum; 17 ... constant force spring.
`
`123456789
`
`10
`11
`12
`13
`14
`15
`16
`17
`18
`19
`20
`21
`22
`23
`24
`25
`26
`27
`28
`29
`30
`31
`32
`33
`34
`35
`36
`37
`38
`39
`40
`41
`42
`43
`44
`45
`46
`47
`48
`49
`50
`51
`52
`
`123456789
`
`10
`11
`12
`13
`14
`15
`16
`17
`18
`19
`20
`21
`22
`23
`24
`25
`26
`27
`28
`29
`30
`31
`32
`33
`34
`35
`36
`37
`38
`39
`40
`41
`42
`43
`44
`45
`46
`47
`48
`49
`50
`51
`52
`53
`
`- 210 -
`
`Norman Int. Exhibit 1002
`
`

`
`Japanese Unexamined Patent Application Publication S54–38648 (3)
`
`-211-
`
`Norman Int. Exhibit 1002
`
`

`
`Japanese Unexamined Patent Application Publication S54–38648 (4)
`
`- 212 -
`
`Norman Int. Exhibit 1002
`
`

`
`®E$Efi%E
`
`®%%m%£%
`
`fifififififi
`
`mE54——38648
`
`@Int. CL2
`I3 06 I3
`
`9/322
`
`fifiljéfl-'%
`
`®B$fifi WW¥E§%
`7369-2E
`89(2)lD 411
`
`“ABE BE$I]54$(1979) 3 F1 23 B
`
`1
`%%®fi
`fifififi E
`
`(£4 E)
`
`®N%yvy734yFm%L%E
`
`®%
`
`@m
`
`Ea Ha52——105456
`
`E %MflWD9H2B
`
`®%
`
`% % fiM$%
`
`7% fiM7547FI¥%fi
`
`gum
`
`@fl
`
`fl A fiM754VFI%%fi%fi
`
`$fi%fi§Efi4*4TBw%
`
`7%
`
`§§%&§Efi4$4TE%%
`
`@1’€
`
`fffi
`
`/\
`
`7‘?=fEi
`
`_Ei7<E|3‘If3
`
`filz
`
`@
`
`M
`
`¥
`
`om$ommwwmL1am§Hnom$#@
`
`m%wozm
`
`-<:?.-'/‘ry7’54*/]~'€)%§=_t&E
`
`éfimbrfiflmmwmiafawywofifi
`
`2%%fi$®%%
`
`Kxar»a&@~KL1mfimomn+»;
`
`«$v+y754VFo%¢H&fi§#@m
`
`&$f5:9KLT&bC&&%fi&?5&%
`
`1dEfimKEfiEflh&EfiL\754yF
`&%LW£KfiWxR$Kk%<&5fiEmE
`
`-y—\*y7'§4 V.l~'®%_t.§EVCB§:?‘Z»%¢D'o'.‘-‘J5
`91\7§4yF®%iW%TL&fi5kbK
`
`mK%mLTEfiEHh®fi$¥&&EmL1
`
`Wfim&fifiT6flfi7§4yF®flEK@%
`
`#m754yrofi§Kfi%¢éHn+»;&
`
`&<—E@&¢oflTx<.ébm754yr
`
`$¢ax5mL1aa:a&%&&¢a«xv
`
`©%iW&%¢?$¢LT%7§4VF®E§
`
`‘V:/7'54 7|"‘a)%...t§fio
`
`agwofimumw
`
`1E%ET&f\Hh+»9&$91%omE
`Kfim€E£Ck#T§bfi%#§£o
`
`«xv§yra4yvo#mm2m$mm%
`
`EEo$m%K9w1\«4vwy7§4y
`
`&%91EELT7§4vF&%iHékt\
`
`ro:m1K#mm2&fi%L\¢mm2o&
`
`%iWo£fi&#K&fiKfi§#k§<&D\
`
`mWKfi%Hkr5Aa.sw%—74.4&
`
`mK%TH%tt%THofifi&#KfiE#¢
`
`%@L\%?—7¢fl75+VFOX§9FL
`
`€<t5.%91754vro#%m&fi#¢
`
`6mDfi%&EfibfTE6KE%?6°fi%
`
`amKET6fid—Er&<%XfEmL1m
`
`5.
`
`W2d—fiK$fi$7&WfiU\$fiE7KW
`%T6$fi$8@fifiW9K%I—VEm&E
`
`x%%n«zy+y7a4vro¢&mwE
`
`%L\%:—V$mKmm+:—yu2m§L
`
`w§wné§%L;7a4yw2%:Haa2
`
`TTfK$TT5o
`
`\
`
`_%%.
`
`(2)
`
`Norman Int. Exhibit 1002
`
`Norman Int. Exhibit 1002
`
`

`
`?E5E7J’<I?- “/’\'V'7'7’f ‘/l*'fl21H.J:VJ-‘E §VC
`
`wwJw5+~3864aw)
`i‘é'i13VCE7’§fL7‘cF5A14.ti?‘v’r1fi12VC7fl’§§z“Lfc
`
`fifl€fl\?I—VH@—fW&WE9T%I'
`
`bmHK@Ea$KmMLkF5Awt®HK
`
`—Vfim&@EL§$flfie.7mW%EfiK
`
`Efi$HnN&kT&mUK%fiT5o%L1
`
`I91¢%m2&@EL;r§Aa.s#—fi
`
`Efi§unuu%9®mfi¢x5w734vr
`
`WK@ELTWZHT—74&F§A3K%@
`
`#fii%iT%iW5hktt®fiEPKlO
`
`':‘Z>C&!IC.1:':J'C,'FE6z5i§‘!J:irJ‘f9fL\ 25-y
`r5.sw#fiwTfi6miKE&9f%iW
`
`Tfifimztfifibxfitfébwflmfimb
`
`1V5Auw%%?5%%&%8®Kfi?x9
`
`5hao%91%iWm&wHTEe@fi§fi
`
`HTé9k®#%iH®Efi&#K25vb5
`
`@fiE#mfiékb#flm2&@ET5kbK
`cnmmzar»am—E1u&<&zfxm
`
`TAO
`
`mm$¥&R2m€<L1fi§Pwxa+»;
`&fi~mL<mxmmun+»ir2$fax
`
`5KL\754VF&%TTKfiM\fiEP#
`
`K%Kmé(&D\fiT%iT%TLkt§O
`
`mip:1mmm2m¢ammwL.Efi§H
`
`¢%%u7a4yvmfi§tuw%&<\#
`
`hn&fi%®m$¥&R#bKfiKm$¥&&
`
`%m20@E%—EDfi9®fl&$91fi9C
`
`x§<L1%7@mfi¢%mom$¥@r:r
`
`e&amtL1%1m.$2@Kfi1x5m¢
`
`m%m£mL\fifi1fifiEpKI5#%m2
`
`%m2KfifiEHh&§fiL.fifl%5fl.%
`
`KfiT%r»9&@~KL1$fimmHhr»
`
`4@KfiTI5KWfim2&@Ef5fifim9
`
`7t’2$‘3‘Z>I5KLft.§7D'(.'§Z>o
`
`KEfi§dh&§%?5o%2mK£m1iE
`
`toxfififififlflhvtfififéafififi
`
`1WKififim&m%w\ififimKwmm2
`
`2&@GT%tbK$EE7.B&fiL\M%+
`
`&Efifl%T&mfiH&EflL(%6E)»m
`
`+1-vn&&WTaom§¢m—Eofl&m
`
`(5)
`
`(4)
`
`ihHI<\7§4yF®%iWXfl%TLm
`
`%1EflK%%&%MLk4$V+y794
`
`fi¢Tfi%f:—ynmfiW&¢mL1%\7
`
`VF0$fifl\¥2Efl%1EA-Afiflfifi
`
`54VFflBETfiTLI5tT5+»iHE
`
`mm@\%6muEfi§un&«$v+>7a
`
`mEdnKxamfimmfi—munr»7t%
`
`4yV®m%mM§%Lt%m%@~H¥fi%
`
`%m&%Efi¢®mfiTfi¢f5o
`
`%4Efi%5@B-BfiTfifiLk—flEE%
`
`&9‘EfiEdhUfi%9@KfiTI5KH
`
`%5@fiEfiEHh®fififl.$6Mu%5fl
`
`n+»aT#5ti1m%KxmTa15m7
`
`C—Cfi%EE~%7mn754VFfifiT%
`
`547F0fifi®KW&WmLTm$¥&&£
`
`LkflEK#H£%fi§Hh®Rm&fiTEfi
`
`&5&5c&#Emm1a6#\fiEofifiT
`
`E\%§@n7§4yF#fiifiL~%@fiE
`
`fi?I5Kfi%#bfi%®fim$1fiHhb»
`
`wfi$t§wmEm»naEfi&uno#m&
`
`flPk&£I9Kfl¥¥fi&—E©RKmIh
`
`%rmmm\%9mn754yvmm§omm
`
`mmrm$¥@&&%dunr»apa&ax
`
`&Efi§HhOdhb»9®Km&fiTJ57
`
`5K—EmrmmILts®&fi%L1%%m
`
`raga
`
`Lfiiidfiwo
`
`1~7a4yro:w\2m¢mm,s~r
`
`EfiEHhN&Bfim9K§%Tb%3E\
`
`5A\4~?—7\5mz§9f\6mTfi,
`
`%4MK9h1%%o#%fl%%kfl—T\fi
`
`v.e@$m$\o~mmm,mm,1—y$
`
`%m9KE%LkVaAmt@mwm@EEm
`
`11---fitfififif-:r:—y\ 12"-ififi. 13---Mffij,
`
`K%fiLtF5Am&®fiKEfiEdhU&k
`
`14 5-7:.‘ 15---um‘ 10-» V51“, 17---Em
`
`¢éflHK%§ThflIha
`
`Edna
`
`fiflfimfifitfifi
`
`‘<6>
`
`Norman Int. Exhibit 1002
`
`Norman Int. Exhibit 1002
`
`

`
`‘H353 lIE54—3 8 6 4 8 (3!
`
`Norman Int. Exhibit 1002
`
`Norman Int. Exhibit 1002
`
`

`
`44:‘: T/*'(7’§'I'Jl< tum!)
`
`2001HmhXELnIWON
`
`Norman Int. Exhibit 1002
`
`

`
`
`
`
`
`TRANSLATOR CERTIFICATION
`
`County of New York
`State of New York
`
`Date: July 11, 2014
`
`
`
`To whom it may concern:
`
`This is to certify that the attached translation from Japanese into English is an accurate
`representation of the documents received by this office.
`
`The documents are designated as:
`JP patent application No. JPS5438648 (Tachikawa)
`
`
`
`Belinda Lai, Project Manager in this company, certifies that Kazuho Tokito, who translated these
`documents, is fluent in Japanese and standard North American English and qualified to
`translate. Belinda Lai attests to the following:
`
`“To the best of my knowledge, the aforementioned documents are a true, full and accurate
`translation of the specified documents.”
`
`
`
`
`
`Signature of Belinda Lai
`
`Norman Int. Exhibit 1002