EP0242088A2 - Elektronische Uhr mit Solarzelle - Google Patents

Elektronische Uhr mit Solarzelle Download PDF

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Publication number
EP0242088A2
EP0242088A2 EP87302877A EP87302877A EP0242088A2 EP 0242088 A2 EP0242088 A2 EP 0242088A2 EP 87302877 A EP87302877 A EP 87302877A EP 87302877 A EP87302877 A EP 87302877A EP 0242088 A2 EP0242088 A2 EP 0242088A2
Authority
EP
European Patent Office
Prior art keywords
support plate
base plate
case
solar cell
plate
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP87302877A
Other languages
English (en)
French (fr)
Other versions
EP0242088A3 (de
Inventor
Takashi Sato
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Seiko Instruments Inc
Original Assignee
Seiko Instruments Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Seiko Instruments Inc filed Critical Seiko Instruments Inc
Publication of EP0242088A2 publication Critical patent/EP0242088A2/de
Publication of EP0242088A3 publication Critical patent/EP0242088A3/de
Withdrawn legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G04—HOROLOGY
    • G04C—ELECTROMECHANICAL CLOCKS OR WATCHES
    • G04C10/00—Arrangements of electric power supplies in time-pieces
    • G04C10/02—Arrangements of electric power supplies in time-pieces the power supply being a radioactive or photovoltaic source

Definitions

  • This invention concerns an electronic timepiece having a solar cell.
  • An electronic timepiece comprising a translucent member which carries a solar cell; a support plate which supports the translucent member; a base plate which supports the support plate; and a case within which the translucent member, solar cell, support plate and base plate are disposed.
  • an electronic timepiece comprising a translucent member which carries a solar cell; a support plate which supports the translucent member; a base plate which supports the support plate; and a case within which the translucent member, solar cell, support plate and base plate are disposed characterised in that the base plate engages the case; the support plate is disposed in contact with the base plate; and resilient means are interposed between the support plate and the case or means connected to the latter.
  • the translucent member is a translucent dial which carries the solar cell on its rear face.
  • the support plate may have a portion which extends outwardly of the translucent member, the resilient means engaging the said outwardly extending portion.
  • the base plate preferably engages a shoulder in the case.
  • the support plate may be secured to the base plate by means of a plurality of guide pins.
  • Each guide pin may comprise a screw having a head which is disposed adjacent to the support plate to prevent outward movement of the latter.
  • the resilient means may have a portion which engages the translucent member to prevent the latter from being separated from the support plate.
  • FIG. 1 there is shown a base plate 9 which is disposed within and in direct engagement with a shoulder of a case 1 of a wrist watch.
  • a solar cell 7 is formed on the rear face of a glass or other translucent dial 6 over whose front face move hands 18 which are visible through a cover glass 2 secured to the case 1.
  • At least one contact spring 11 extends between the solar cell 7 and a circuit board 12 secured to a movement 13.
  • a stiffened support plate 5 is secured to and supports the glass dial 6 and the solar cell 7 formed thereon by way of a double-sided adhesive tape 8. The stiffened support plate 5, to which the glass dial 6 is secured, is disposed in direct contact with the base plate 9.
  • a rubber packing 16 which serves as a resilient means, is disposed on an outer peripheral surface of the stiffened support plate 5 where the latter extends outwardly of the glass dial 6, and the rubber packing 16 is held between the case 1 and the stiffened support plate 5.
  • Frame members 4 (only one shown) are disposed in contact with an outer peripheral lower surface of the base plate 9, and with an upper or internal surface of a back case 3 which is engaged with the case 1, thereby fixing the whole structure together.
  • the base plate 9 When an impulsive force due to a shock is applied from above the cover glass 2, the base plate 9 is urged in the direction of the glass dial 6 by virtue of the weight of the movement 13. However, since the case 1 and the base plate 9 are engaged with each other, the impulsive force of the movement 13 can be checked almost perfectly by the base plate 9. Moreover, even if the base plate 9 is bent by the impulsive force of the movement 13 and thus the stiffened support plate 5 is subjected more or less to an impulsive force, nevertheless the latter force will be absorbed by the rubber packing 16.
  • Figure 2 The construction of Figure 2 is, however, generally similar to that of Figure 1 and consequently the construction of Figure 2 will not be described in detail, the same reference numerals (or similar reference numerals with the suffix " b ")indicating similar parts.
  • a plurality of guide pins 15 b (only one shown) pass through a base plate 9 b to act as a guide of the required position of a stiffened support plate 5 b .
  • a male screw 14 b having a head or collar, is tightened into a tapped hole in the respective guide pin 15 b to prevent the stiffened support plate 5 b from flying out.
  • the base plate 9 b is urged in the direction of a glass dial 6 b by virtue of the weight of the movement 13.
  • the impulsive force caused by the weight of the movement 13 can be checked almost perfectly by the base plate 9 b . If, however, the base plate 9 b were to be bent by the impulsive force of the movement 13 so as to impart an impulsive force more or less to the stiffened support plate 5 b , such an impulsive force would be absorbed by a rubber packing 16 b .
  • the glass face 6 b with the solar battery 7 formed thereon is joined to the stiffened plate 5 b with the double-sided adhesive tape 8.
  • the glass dial 6 b with the solar battery 7 formed thereon and the stiffened support plate 5 b are subjected all the time to a force which tends to separate them by the contact spring or springs 11. Therefore the rubber packing 16 b is provided with a flange or collar as illustrated which engages an outer peripheral surface of the glass dial 6 b , thereby preventing the parts 5 b , 6 b from being separated from each other.
  • the rubber packing 16 b instead of engaging the case 1 b directly, engages a packing ring 17 b which itself engages both the case 1 and the cover glass 2.
  • Each of the guide pins 15 b which pass through the base plate 9 b serves as a guide in the plane of the stiffened support plate 5 b .
  • a clearance 60 is maintained between the collar or head part of the male screw 14 b and the stiffened support plate 5 b . If the hands 18 are mounted in position before the rubber packing 16 b is installed at the time of the assembly of the watch, the clearance 60 will be effective in preventing the glass dial 6 b from flying out by reason of the force exerted by the contact spring 11.
  • Figure 3 illustrates a modification of the construction of Figure 2 wherein a rubber packing 16 c which is T-shaped in cross-section is mounted in an inner peripheral groove of a packing ring 17 c , thereby improving the stability of the rubber packing.
  • Figure 4 illustrates a further modification of the construction of Figure 2 wherein a rubber packing 16 d which is T-shaped crosswise in cross section is mounted in a groove of a packing ring 17 d to improve the stability of the rubber packing and also to change the longitudinal length of the rubber packing 16 d , thereby compensating for shrinkage of the rubber packing 16 d .
  • any contact between the glass dial 6 and other members will not prevent the glass dial 6 from being protected from impulsive force, thus removing the disadvantage of the prior art mentioned above.
  • the glass dial 6 can be located in the required plane by means of the guide pins 15 b , and thus it is not necessary to make the glass dial 6 itself rectangular in shape. Consequently, the glass dial 6 may have a circular shape so that its production costs can be substantially reduced. Moreover, since the glass dial 6 need not be rectangular, there is a greater degree of freedom for design.
  • a U-shaped crosswise frame as indicated by the reference character 10 e in Figure 5, must be provided to prevent the glass dial from flying out during assembly due to the lifting force of the contact spring.
  • the glass dial 6 b can be securely retained by a simple member such as the male screw 14 b , with the result that production costs are reduced and a separate assembly operation is not necessary for the glass dial 6 b and frame member 4.
  • the hands 18 can be assembled according to a part stacking system, an automatic line assembly of the movement 13 can also be achieved.
  • varied shapes and materials may be used for the components shown in Figure 3 and Figure 4 which provide resilient means for absorbing impulsive force. Therefore, stability of the packing during and after assembly can be increased, and the shock resistance can also be increased with respect to a vibration mode of impulsive force.
  • a glass dial 6 e with a solar cell 7 formed thereon is secured to a stiffened support plate 5 e by means of a double-sided adhesive tape 8.
  • the stiffened support plate 5 e is supported by a frame 10 e , the frame 10 e being disposed on an upper surface of a base plate 9 e so as to enable pins formed on the frame 10 e to engage in guide holes of the base plate 9 e .
  • Frame members 4 (only one shown) are disposed in contact with the outer peripheral lower surface of the base plate 9 e , the frame 10 e and the frame members 4 being held between a case 1 e and a back case 3, thereby fixing the whole structure together.
  • a glass dial 6 f with a solar cell 7 formed thereon and a stiffened support plate 5 f with legs 20 formed therefor are incorporated in a frame 10 f which is U-shaped crosswise in section.
  • the legs (only one shown) are engaged in guide holes in a movement 13 and in guide holes in a base plate 9 f .
  • the frame members 4 are disposed so as to contact an outer peripheral lower surface of the base plate 9 f , and the frame 10 f and the frame members 4 are held between a case 1 f and a back case 3, thereby fixing the whole structure together.
  • the dial 6 e may be accidentally cracked if an impulsive force is applied thereto through the stiffened support plate 5 e when the base plate 9 e is bent toward the stiffened support plate 5 e as the result of an impulsive force being applied to the wrist watch.
  • guide pins 15 b pass through the base plate 9 b and the stiffened support plate 5 b is located on the base plate 9 b with the guide pins 15 b acting as a guide. Therefore the glass dial 6 b joined to the stiffened support plate 5 b is adjusted for circumferential position, and thus the glass dial may be made in a circular shape.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Electromechanical Clocks (AREA)
  • Electric Clocks (AREA)
  • Photovoltaic Devices (AREA)
EP87302877A 1986-04-08 1987-04-02 Elektronische Uhr mit Solarzelle Withdrawn EP0242088A3 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP80718/86 1986-04-08
JP8071886A JPS62237385A (ja) 1986-04-08 1986-04-08 太陽電池式腕時計

Publications (2)

Publication Number Publication Date
EP0242088A2 true EP0242088A2 (de) 1987-10-21
EP0242088A3 EP0242088A3 (de) 1989-10-25

Family

ID=13726129

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87302877A Withdrawn EP0242088A3 (de) 1986-04-08 1987-04-02 Elektronische Uhr mit Solarzelle

Country Status (2)

Country Link
EP (1) EP0242088A3 (de)
JP (1) JPS62237385A (de)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0780741A4 (de) * 1994-09-08 1997-07-16
EP0788037A4 (de) * 1994-10-21 1998-01-14 Citizen Watch Co Ltd Zifferblatt für eine mittels solarzellen betriebene uhr und verfahren zur herstellung eines solchen zifferblattes
EP0831537A3 (de) * 1993-12-14 1998-04-08 Citizen Watch Co. Ltd. Solarzellenbatterie
US5761158A (en) * 1994-09-08 1998-06-02 Citizen Watch Co., Ltd. Solar battery powered watch
EP0816953A4 (de) * 1996-01-23 1999-05-06 Seiko Epson Corp Anzeigestruktur mit solarzellen und durch solarzellen betriebene elektronische vorrichtungen und uhren
EP0895141A4 (de) * 1996-03-08 1999-06-16 Citizen Watch Co Ltd Zifferblatt für uhren
EP0867787A4 (de) * 1996-09-12 2002-10-16 Citizen Watch Co Ltd Elektronische uhr mit eingebauter solarzelle
CN103019086A (zh) * 2011-09-22 2013-04-03 精工爱普生株式会社 电子钟表以及二次电池单元
CN103163774A (zh) * 2011-12-09 2013-06-19 精工爱普生株式会社 带有太阳能电池的电子钟表
JP2015143641A (ja) * 2014-01-31 2015-08-06 シチズンホールディングス株式会社 太陽電池付き時計の文字板及び太陽電池付き時計

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4551531B2 (ja) * 2000-04-24 2010-09-29 シチズンホールディングス株式会社 太陽電池付電子時計
JP6113055B2 (ja) * 2013-11-06 2017-04-12 シチズン時計株式会社 電子時計

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1359376A (en) * 1970-12-29 1974-07-10 Suwa Seikosha Kk Electric time-peices
JPS5245367A (en) * 1975-08-01 1977-04-09 Seiko Instr & Electronics Ltd Construction for mounting of ceramic substrate in liquid crystal displ ay wristwatch
GB1578573A (en) * 1976-06-08 1980-11-05 Citizen Watch Co Ltd Solar cell timepiece
US4234947A (en) * 1977-12-20 1980-11-18 Citizen Watch Co., Ltd. Solar battery powered timepiece

Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0831537A3 (de) * 1993-12-14 1998-04-08 Citizen Watch Co. Ltd. Solarzellenbatterie
US5761158A (en) * 1994-09-08 1998-06-02 Citizen Watch Co., Ltd. Solar battery powered watch
EP0890887A1 (de) * 1994-09-08 1999-01-13 Citizen Watch Co., Ltd. Durch Solarbatterie gespeiste Uhr
EP0780741A4 (de) * 1994-09-08 1997-07-16
US6021099A (en) * 1994-10-21 2000-02-01 Citizen Watch Co., Ltd. Solar-cell watch dial and process for producing the same
EP0788037A4 (de) * 1994-10-21 1998-01-14 Citizen Watch Co Ltd Zifferblatt für eine mittels solarzellen betriebene uhr und verfahren zur herstellung eines solchen zifferblattes
US6099761A (en) * 1994-10-21 2000-08-08 Citizen Watch Co., Ltd. Process for producing solar-cell watch dial
US6094404A (en) * 1996-01-23 2000-07-25 Seiko Epson Corporation Display structure with solar cell, and electronic devices and timepiece powered by solar cell
EP0816953A4 (de) * 1996-01-23 1999-05-06 Seiko Epson Corp Anzeigestruktur mit solarzellen und durch solarzellen betriebene elektronische vorrichtungen und uhren
EP0895141A4 (de) * 1996-03-08 1999-06-16 Citizen Watch Co Ltd Zifferblatt für uhren
US6466522B1 (en) 1996-03-08 2002-10-15 Citizen Watch Co., Ltd. Indicating plate for watches
EP0867787A4 (de) * 1996-09-12 2002-10-16 Citizen Watch Co Ltd Elektronische uhr mit eingebauter solarzelle
CN103019086A (zh) * 2011-09-22 2013-04-03 精工爱普生株式会社 电子钟表以及二次电池单元
CN103019086B (zh) * 2011-09-22 2015-10-21 精工爱普生株式会社 电子钟表以及二次电池单元
CN103163774A (zh) * 2011-12-09 2013-06-19 精工爱普生株式会社 带有太阳能电池的电子钟表
CN103163774B (zh) * 2011-12-09 2015-07-01 精工爱普生株式会社 带有太阳能电池的电子钟表
JP2015143641A (ja) * 2014-01-31 2015-08-06 シチズンホールディングス株式会社 太陽電池付き時計の文字板及び太陽電池付き時計

Also Published As

Publication number Publication date
EP0242088A3 (de) 1989-10-25
JPS62237385A (ja) 1987-10-17

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Inventor name: SATO, TAKASHI