US3727367A - Shock proof watchcase - Google Patents

Shock proof watchcase Download PDF

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Publication number
US3727367A
US3727367A US00187261A US3727367DA US3727367A US 3727367 A US3727367 A US 3727367A US 00187261 A US00187261 A US 00187261A US 3727367D A US3727367D A US 3727367DA US 3727367 A US3727367 A US 3727367A
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US
United States
Prior art keywords
shock
case body
watchcase
absorbing
case
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.)
Expired - Lifetime
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US00187261A
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English (en)
Inventor
Y Fujimori
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Individual
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Individual
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Publication date
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Publication of US3727367A publication Critical patent/US3727367A/en
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    • G—PHYSICS
    • G04—HOROLOGY
    • G04B—MECHANICALLY-DRIVEN CLOCKS OR WATCHES; MECHANICAL PARTS OF CLOCKS OR WATCHES IN GENERAL; TIME PIECES USING THE POSITION OF THE SUN, MOON OR STARS
    • G04B37/00—Cases
    • G04B37/04—Mounting the clockwork in the case; Shock absorbing mountings
    • G04B37/05—Fixed mountings for pocket or wrist watches
    • G04B37/052—Fixed mountings for pocket or wrist watches with shock damping means not related to the winding stem

Definitions

  • ABSTRACT A shock-proof watchcase having a shock-absorbing member supported between the case body and back cover. The watch movement is mounted on said shock-absorbing member. The shock-absorbing member is adapted to absorb shocks both in the axial and transverse directions Of the watch.
  • shock-proof bearings are provided at portions of the watch movement particularly susceptible to shocks, such as the axis of the balance, so that, for example, the axis of the balance cannot be disabled'and the watch movement cannot be stopped, even if the watch is subjected to shock.
  • a plastic deformation occurs in the hair spring of the balance which has substantial influence on the time-keeping accuracy of the watch.
  • several screws in the watch movement tend to become loosened.
  • the errors in timekeeping accuracy caused by such shocks are relatively large, and cannot be avoided in the known shock-proof arrangements.
  • the shock-proof bearings utilized are not strong enough to prevent the hair spring of the balance from being subjected to plastic deformation.
  • the conventional shock-proof arrangements cannot protect a watch against outside shocks to the extent necessary to prevent errors in time-keeping accuracy.
  • the shock-proof watchcase according to the invention includes a shock-absorbing member formed of rubber, a synthetic resin, a plate spring or the like, and mounted between the case body and the case back.
  • the watch movement is supported on said shock-absorbing member, said shock-absorbing member being adapted to absorb shocks in both the axial and the transverse directions of said watch.
  • separate supporting-ring member may be provided for carrying said watch movement, shock-absorbing elements being positioned intermediate said supportingring member and both said case body and said case back to suspend said supporting-ring member and case movement in spaced relation to both said case body and said case back.
  • a further object of the invention is to provide a shock-proof watchcase wherein the watch movement is supported in spaced relation to both the case body and case back by shock-absorbing elements.
  • FIG. 1 is a partial sectional view showing one embodiment of the shock-proof watchcase according to v DESCRIPTION OF THE PREFERRED EMBODIMENTS
  • the deformation in the vibratory direction of the hair spring or transverse direction of the watch (X direction) is greater than the deformation in the axial direction of the watch balance (Y direction).
  • the arrangement according to the invention is adapted to take advantage of these characteristics by gradually absorbing the momentary shock force exerted in the vibratory direction of the hair spring (X direction) through a shock-absorbing member mounted between the watch movement and the watchcase. In this manner, deformation in the vibratory direction of the hair spring cannot occur.
  • the wristwatch includes a case body 1.
  • a supporting ring 2 having an elastic projecting portion 2a formed as a unit therewith on the upper side thereof engages and supports a watch movement 5.
  • Said watch movement and supporting ring are positioned and supported within case body 1 by means of a shock-absorbing ring or partial ring member 3 formed of a synthetic resin or a hard rubber.
  • a further shock-absorbing member 4 formed of a relatively soft synthetic resin or rubber is positioned intermediate supporting ring 2 and a case back 6.
  • Said case back is threadably engaged in case body 1 and cooperates with said case body to support and suspend the movementS by means of the shockabsorbing rings 3 and 4 and the supporting ring 2.
  • the watch also includes a crystal 7 engaged against case body 1 by means of a tension ring 8, and a watch dial 9.
  • the watch movement 5 and supporting ring 2 are suspended in spaced relation relative to case body 1 and case back 6, as indicated by the intervals a, b, d, and e.
  • the width of intervals a is larger than the width of intervals b, so that the movement cannot directly hit against the case. Even in the face of extreme vibration, only the supporting ring would engage the case body.
  • the width of interval e is larger than that of interval d, so that the movement cannot directly hit against the case back even if subjected to maximum deformation. In such circumstances, the supporting ring would strike against said case back.
  • the width of interval 0 is larger than that of interval d, in order to ensure that shock-absorbing member 3 is not displaced and disengaged from the case body surface 1a.
  • the watch movement is normally positioned and fixed by the shock-absorbing member 3 against the case body. Shocks in the X direction, as shown in FIG. 1, are gradually absorbed so as to weaken the operating force on the hair spring and balance wheel. On the other hand, shocks in the Y direction are principally absorbed by shock-absorbing member 4, with shock- An alternate embodiment is shown in FIG. 2,-
  • shock-absorbing member 3 and the shock-absorbing member 4 may be formed as a unit as shown by shock-absorbing member 12 of FIG. 3.
  • the shock-absorbing member is formed of a thinmetal plate and the fixed surfaces of the case body and case back against which said shockabsorbing member engages are inclined to obtain a vibratory displacement in the up and down, or axial, direction when shocks are applied;
  • the watch movement is positioned and fixed relative to the inclined surfaces of the case body and case back through the shock-absorbing member 12 by the uniform force applied to the shock-absorbing member by the watchcase.
  • the effect is the same as in the embodiments of FIGS. 2 and 3.
  • the shockabsorbing member When the shock force is applied in the vertical, or axial, direction, the shockabsorbing member is displacedand absorbs the shock force.
  • a projecting portion 13a provided at certain locations in the outer peripheryof supporting ring 13.
  • the shock-absorbing member 12 which may be formed of a synthetic resin or a plate spring.
  • the shock-absorbing member and the supporting ring are fixed together by positioning theprojecting portions within said apertures.
  • the watchcase according to the invention is particularly adapted to absorb shocks in, the vibratory direction of the watch hair spring, a feature not found in the known. shock-proof watchcaseconstructions. Further, the watchcase construction according to the invention is readily assembled from a minimum of parts, thereby resulting in improved production charac- I case body and case back.
  • a shock-proof watchcase comprising a case body
  • a case back adapted for cooperative engagement with said case body; a watch movement; a supporting ring engaged against the periphery of said watch" movement for supporting said watch movement; and shock-absorbing means intermediate said supporting ring and each of said case body and case back, said supporting ring, shock-absorbing means, case back and case body being dimensioned for clearance between said supporting ring and watch movement on the one hand and said case back and case body on the other hand in both the axial and transverse directions of said watchcase so that both axial and transverse shocks may be absorbed.
  • shock-absorbing means includes shockabsorbing portions projecting substantially in said axial direction for respective engagement by said case body and case back.
  • shock-absorbing portions is formed as a separate element mounted intermediate 5.
  • shock-absorbing portions are formed as an axially extending plate member engaged between said case body and case back, said shock-absorbing means including means for supporting said supporting ring on said plate member.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Electromechanical Clocks (AREA)
  • Adornments (AREA)
US00187261A 1970-10-08 1971-10-07 Shock proof watchcase Expired - Lifetime US3727367A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP45087857A JPS518582B1 (ja) 1970-10-08 1970-10-08

Publications (1)

Publication Number Publication Date
US3727367A true US3727367A (en) 1973-04-17

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Family Applications (1)

Application Number Title Priority Date Filing Date
US00187261A Expired - Lifetime US3727367A (en) 1970-10-08 1971-10-07 Shock proof watchcase

Country Status (4)

Country Link
US (1) US3727367A (ja)
JP (1) JPS518582B1 (ja)
CH (1) CH1462271A4 (ja)
GB (1) GB1343997A (ja)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3855786A (en) * 1972-12-26 1974-12-24 Seiko Instr & Electronics Impact-proof watchcase
US3911669A (en) * 1973-04-04 1975-10-14 Kienhofer & Moog Gmbh Kg Watch construction
US6575619B1 (en) * 1999-04-22 2003-06-10 Eta Sa Fabriques D'ebauches Method for assembling a casing ring in a watch case and casing ring for such method
US20030231558A1 (en) * 2002-05-30 2003-12-18 Hisao Nakamura Timepiece
US20060164924A1 (en) * 2005-01-26 2006-07-27 Seiko Epson Corporation Timepiece movement holding structure and timepiece
US20080101165A1 (en) * 2005-02-18 2008-05-01 Richemont International Sa Damping Device, Particularly For A Wrist-Watch
US20110019508A1 (en) * 2009-07-22 2011-01-27 Lvmh Swiss Manufactures Sa Shock proof watch

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4905815B2 (ja) * 2009-10-28 2012-03-28 カシオ計算機株式会社 緩衝部材、腕時計の衝撃緩衝構造および腕時計
EP3974914A1 (fr) * 2020-09-25 2022-03-30 The Swatch Group Research and Development Ltd Dispositif de blocage d'un mouvement d'une piece d'horlogerie

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2256200A (en) * 1939-07-28 1941-09-16 Donovan J Heilman Watchcase
GB721920A (en) * 1952-07-17 1955-01-12 Charles Jules Juillerat Waterproof shock-absorbing watch case
US3492810A (en) * 1967-07-07 1970-02-03 Movado Montres Timepiece case with movement-securing shock-absorbing means
US3643424A (en) * 1968-08-19 1972-02-22 Ronald Bley Fluidtight watch

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH346825A (fr) * 1958-05-08 1960-05-31 Boites De Montres Huguenin S A Pièce d'horlogerie

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2256200A (en) * 1939-07-28 1941-09-16 Donovan J Heilman Watchcase
GB721920A (en) * 1952-07-17 1955-01-12 Charles Jules Juillerat Waterproof shock-absorbing watch case
US3492810A (en) * 1967-07-07 1970-02-03 Movado Montres Timepiece case with movement-securing shock-absorbing means
US3643424A (en) * 1968-08-19 1972-02-22 Ronald Bley Fluidtight watch

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3855786A (en) * 1972-12-26 1974-12-24 Seiko Instr & Electronics Impact-proof watchcase
US3911669A (en) * 1973-04-04 1975-10-14 Kienhofer & Moog Gmbh Kg Watch construction
US6575619B1 (en) * 1999-04-22 2003-06-10 Eta Sa Fabriques D'ebauches Method for assembling a casing ring in a watch case and casing ring for such method
US20030231558A1 (en) * 2002-05-30 2003-12-18 Hisao Nakamura Timepiece
US6971789B2 (en) * 2002-05-30 2005-12-06 Seiko Instruments Inc. Timepiece
US20060164924A1 (en) * 2005-01-26 2006-07-27 Seiko Epson Corporation Timepiece movement holding structure and timepiece
US20080101165A1 (en) * 2005-02-18 2008-05-01 Richemont International Sa Damping Device, Particularly For A Wrist-Watch
US7431495B2 (en) * 2005-02-18 2008-10-07 Richemont International S.A. Damping device, particularly for a wrist-watch
US20110019508A1 (en) * 2009-07-22 2011-01-27 Lvmh Swiss Manufactures Sa Shock proof watch
US8328416B2 (en) 2009-07-22 2012-12-11 Lvmh Swiss Manufactures Sa Shock proof watch

Also Published As

Publication number Publication date
GB1343997A (en) 1974-01-16
JPS518582B1 (ja) 1976-03-18
CH1462271A4 (fr) 1977-08-15

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