EP3896533A1 - Zeigerrohr einer uhr - Google Patents

Zeigerrohr einer uhr Download PDF

Info

Publication number
EP3896533A1
EP3896533A1 EP20170044.0A EP20170044A EP3896533A1 EP 3896533 A1 EP3896533 A1 EP 3896533A1 EP 20170044 A EP20170044 A EP 20170044A EP 3896533 A1 EP3896533 A1 EP 3896533A1
Authority
EP
European Patent Office
Prior art keywords
barrel
groove
needle
projection
lifting end
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.)
Pending
Application number
EP20170044.0A
Other languages
English (en)
French (fr)
Inventor
David ECOFFEY
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.)
Patek Philippe SA Geneve
Original Assignee
Patek Philippe SA Geneve
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 Patek Philippe SA Geneve filed Critical Patek Philippe SA Geneve
Priority to EP20170044.0A priority Critical patent/EP3896533A1/de
Publication of EP3896533A1 publication Critical patent/EP3896533A1/de
Pending legal-status Critical Current

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Classifications

    • 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
    • G04B19/00—Indicating the time by visual means
    • G04B19/04—Hands; Discs with a single mark or the like
    • G04B19/044—Mounting and setting of the hands on the axle

Definitions

  • the present invention relates to a clockwork needle barrel.
  • the barrel of a clockwork hand is a part or hollow part to which the hand is integral and through which the hand is fixed on its shaft.
  • the barrel can be an insert or can be integral with the needle. He is chased on the tree.
  • one of the first operations to perform is to remove the hands.
  • the barrel of each needle can be lifted using levers which are supported on the dial.
  • the lifting end of the levers acts on the lower surface of an annular projection of the barrel to separate the barrel from the shaft.
  • the lifting end will slip past the annular protrusion and come into contact with the needle, causing scratches, chipping, deformation, etc.
  • the risk of needle damage is particularly great if the needle is made of a fragile material.
  • the present invention aims to remedy this drawback or at least to mitigate it and to this end proposes a barrel according to claim 1, a barrel-needle assembly according to claim 10 and a detachment method according to claim 13.
  • the watch assembly illustrated in figures 1 and 2 is formed of a barrel 10 and a hand 11 fixed to the barrel 10.
  • the hand 11 may be an indicator hand for hours, minutes, date, etc. It comprises a head 12 and a body 13.
  • the barrel 10 is intended to be driven out on the drive shaft 14 of the needle 11.
  • the barrel 10 has an axis of revolution A and comprises, around this axis A, a wall 15 of generally cylindrical shape and a projection 16 in relief on the outside of the wall 15.
  • the upper surface 17 of the projection 16 forms with an upper part 18 of the wall 15 a shoulder which accommodates the head 12 of the needle 11.
  • the head 12 is fixed to the upper surface 17 of the projection 16 by gluing or soldering, for example.
  • a lower part 19 of the wall 15 may be slightly frustoconical, as shown, to facilitate the mounting of the barrel 10 on the shaft 14.
  • the barrel 10 is made of metal or an alloy and the needle 11 is made of a fragile material such as silicon, glass or sapphire, that is to say a material which does not have a plastic deformation range at ambient temperature (25 ° C).
  • the needle 11 is colored at least at its free end, for example by means of a paint, in order to be able to perform its display function.
  • the metal or alloy constituting the barrel 10 may in particular be brass, optionally covered with a protective or embellishing layer such as a layer of gold.
  • the lower surface 20 of the projection 16 is the surface by which the watchmaker can act, when he wishes to access the interior of the watch movement, to separate the hand 11 from the shaft 14 and remove it.
  • this lower surface 20, of annular shape has a groove 21 with which the lifting end 22 of levers 23 can cooperate (cf. figure 3 ).
  • These levers 23 can be brought to bear against the dial 24 of the watch, preferably protected beforehand, with their lifting end 22 against the bottom of the groove 21, and be actuated manually to raise the barrel 10 relative to the shaft. 14. Thanks to the groove 21, the lifting end 22 is prevented from sliding beyond the projection 16 and from striking the head 12 of the needle 11, which protrudes from the projection 16, or even the body 13 of the needle. needle 11.
  • the profile of the groove 21 defines a corner 25 in which the lifting end 22 can be blocked after having raised the barrel 10 to a certain height.
  • the profile of the groove 21 is asymmetrical, without a wedge on the part 26 of the groove 21 opposite the wedge 25, in order to facilitate the manufacture of the barrel 10, in particular if the latter is produced by turning.
  • the width L1 of the groove 21 is preferably at least 40% or even at least 50% or even at least 60% of the width L2 of the projection 16, and is preferably at least 150 ⁇ m, or even at least 170 ⁇ m, or even at least 190 ⁇ m.
  • the depth P of the groove 21 is preferably at least 10%, or even at least 15%, or even at least 20%, or even at least 25% of the thickness E of the projection 16, and is preferably at least 15 ⁇ m, or even at least 25 ⁇ m, or even at least 35 ⁇ m, or even at least 45 ⁇ m, or even at least 55 ⁇ m.
  • the groove 21 could be created by adding a bead (for example deposited, glued, brazed or welded) on the lower surface 20 of the protrusion. 16 or by mounting a ring (for example driven, glued, brazed or welded) on the edge of the projection 16.
  • a bead for example deposited, glued, brazed or welded
  • the invention also applies to guns which are integral with their needle and to metal needles.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Electromechanical Clocks (AREA)
EP20170044.0A 2020-04-17 2020-04-17 Zeigerrohr einer uhr Pending EP3896533A1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP20170044.0A EP3896533A1 (de) 2020-04-17 2020-04-17 Zeigerrohr einer uhr

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP20170044.0A EP3896533A1 (de) 2020-04-17 2020-04-17 Zeigerrohr einer uhr

Publications (1)

Publication Number Publication Date
EP3896533A1 true EP3896533A1 (de) 2021-10-20

Family

ID=70295001

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20170044.0A Pending EP3896533A1 (de) 2020-04-17 2020-04-17 Zeigerrohr einer uhr

Country Status (1)

Country Link
EP (1) EP3896533A1 (de)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63195284U (de) * 1987-06-04 1988-12-15
EP1248164A1 (de) * 2001-04-03 2002-10-09 Eta SA Fabriques d'Ebauches Uhrwerk

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63195284U (de) * 1987-06-04 1988-12-15
EP1248164A1 (de) * 2001-04-03 2002-10-09 Eta SA Fabriques d'Ebauches Uhrwerk

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