EP1088492A2 - Fermoir à ressort - Google Patents

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Publication number
EP1088492A2
EP1088492A2 EP00830634A EP00830634A EP1088492A2 EP 1088492 A2 EP1088492 A2 EP 1088492A2 EP 00830634 A EP00830634 A EP 00830634A EP 00830634 A EP00830634 A EP 00830634A EP 1088492 A2 EP1088492 A2 EP 1088492A2
Authority
EP
European Patent Office
Prior art keywords
arm
clasp
elastic means
free end
spring
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Withdrawn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
EP00830634A
Other languages
German (de)
English (en)
Other versions
EP1088492A3 (fr
Inventor
Urbano Terziani
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.)
Cento Group SpA
Original Assignee
Cento Group SpA
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 Cento Group SpA filed Critical Cento Group SpA
Publication of EP1088492A2 publication Critical patent/EP1088492A2/fr
Publication of EP1088492A3 publication Critical patent/EP1088492A3/fr
Withdrawn legal-status Critical Current

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Classifications

    • A—HUMAN NECESSITIES
    • A44—HABERDASHERY; JEWELLERY
    • A44C—PERSONAL ADORNMENTS, e.g. JEWELLERY; COINS
    • A44C5/00—Bracelets; Wrist-watch straps; Fastenings for bracelets or wrist-watch straps
    • A44C5/18—Fasteners for straps, chains or the like
    • A44C5/20—Fasteners for straps, chains or the like for open straps, chains or the like
    • A44C5/2019—Hooks
    • A44C5/2033—Hooks provided with pivoting closure means
    • A44C5/2038—Swivels

Definitions

  • the present invention relates to a spring-catch clasp for the field of jewelry and costume jewelry, featured by a better usefulness with respect to the conventional, known clasps of the same type.
  • the spring-catch clasps of the convention type are formed by a body, to be connected to one end of a necklace, a bracelet or, more generally, an ornamental chain, said end being possibly equipped with a cap or end member, and an annular portion extending from said body.
  • the annular portion is formed by a first element, of greater length, fixed with respect to the body and a second element, or pawl, of lower length, elastically displaceable with respect to said body and operable by acting on a lug projecting radially from the pawl edge, when the clasp has to be opened.
  • the pawl when operated, displaces angularly toward the inside of the annular portion, thus providing a passage through which the female member of the clasp, fixed to the other end of the necklace or the bracelet, can be engaged or disengaged.
  • the shape of the fixed element of the annular portion must be such that the distance between the pawl end and any of the points of the fixed element, at each moment of its angular displacement, be substantially greater than the thickness of the female member.
  • This condition requests that the clasp would be of a substantially arched shape and, therefore, the use of a so shaped clasp is limited to only those cases in which the clasp shape is compatible with the design of the necklace or bracelet to which the clasp has to be applied.
  • the object of the present invention is to provide a spring-catch clasp characterized by such a structure that from one hand, it would result in a easier operation and, from the other one, be less binding for the designer as compared to the spring-catch clasps of the prior art type.
  • the spring-catch clasp which comprises a body with an annular portion, fit for engaging with the female member of the clasp, the annular portion being formed by an arm extending between two expansions of the clasp body and pivotally connected to the latter through one of its ends.
  • Elastic means for forcing the other end or free end of the arm against the respective expansion of the body clasp are provided between the arm end connected to the body and the body itself.
  • the arm comprises means for applying a force counteracting that of the elastic means to disengage the free end of the arm from the respective expansion causing the arm to perform an angular displacement away from the clasp body.
  • the necklace or bracelet can be released with only one hand, which holds the end of the necklace or bracelet bearing the clasp body and, at the same time, applies the necessary force to overcome the resistance of the elastic means withstanding the clasp opening.
  • the arm shape is not decisive for a proper operation of the clasp and, therefore, can be freely designed according to the most different needs.
  • a clasp body formed by a pair of walls la and 1b extending in a parallel, spaced relationship from a common edge lc thereof, from which a semiannular element 2 extends for the connection to one end of the necklace or bracelet.
  • two expansions 3 and 4 extend symmetrically from body 1.
  • An arm 5 bridges expansions 3 and 4 and has an enlarged end 5a housing between walls 1a and 1b and is pivotally connected to these walls by means of a pin 6. Arm 5 comes out from expansion 4 and extends up to the other expansion 3 abutting against it with its free end.
  • a flexural coil spring 7 is arranged around pin 6 and abuts against body 1 with one end and against arm 5 with the other one to force the free end of arm 5 against expansion 3.
  • spring 7 has two active arms 7a and 7b, spaced to each other of an angle greater than 90°, which abut on body 1 and arm 5 respectively and are oriented toward arm 5 (active arm 7b) and toward the opposite side (active arm 7a).
  • a lug 8 extends sideways from arm 5 close to its enlarged end 5a. Lug 8 acts as a point of application of a force for overcoming the elastic strength of spring 7, thus causing arm 5 to rotate around pin 6 and move its free end away from expansion 3.
  • a seat 3a is formed within expansion 3 and the free end of arm 5 engages with seat 3a.
  • Figures 6 to 9 and 10 to 14 show two different embodiments of spring-catch clasp according to the invention of quadrilateral shape and of circular shape respectively.
  • the same reference numerals are used to identify the same components as in the embodiments shown in figures 1 to 5.
  • body 1 and expansions 3 and 4 thereof have an asymmetrical shape and the point of application of the force is in the shape of a rounded side protrusion 9 of enlarged end 5a of arm 5.
  • the arm 5-protrusion 9-pin 6 system forms a first-class lever, that is pin 6 is placed between the free end of arm 5 and protrusion 9, which is the power application point.
  • spring 7 has two active arms 7a and 7b spaced to each other, in this case, of an angle lower than 90°, which abut on body 1 and arm 5 respectively and both extend to the opposite part of arm 5 with respect to pin 6.
  • Pin 6 may be riveted to body 1 or there may be provided for a half-pin forming a single piece with body 1, for example extending from the inner face of one of walls 1a and 1b.

Landscapes

  • Adornments (AREA)
  • Telephone Function (AREA)
  • Magnetic Resonance Imaging Apparatus (AREA)
  • Seal Device For Vehicle (AREA)
EP00830634A 1999-09-29 2000-09-25 Fermoir à ressort Withdrawn EP1088492A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITFI990116U 1999-09-29
ITFI990116 IT248315Y1 (it) 1999-09-29 1999-09-29 Chiusura a moschettone

Publications (2)

Publication Number Publication Date
EP1088492A2 true EP1088492A2 (fr) 2001-04-04
EP1088492A3 EP1088492A3 (fr) 2002-09-04

Family

ID=11352976

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00830634A Withdrawn EP1088492A3 (fr) 1999-09-29 2000-09-25 Fermoir à ressort

Country Status (2)

Country Link
EP (1) EP1088492A3 (fr)
IT (1) IT248315Y1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
USD951129S1 (en) 2020-06-16 2022-05-10 Venus by Maria Tash, Inc. Lobster clasp

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4094047A (en) * 1975-02-18 1978-06-13 Carlsson Gunilla A Snap shackle
US5117539A (en) * 1991-09-03 1992-06-02 Shrader James P Clasp mechanism
DE4438487A1 (de) * 1993-11-03 1995-05-11 Emil Klingenfus Kg Karabiner für Schmuckketten
US5548875A (en) * 1995-01-18 1996-08-27 Hart; Courtney L. Safety snap

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4094047A (en) * 1975-02-18 1978-06-13 Carlsson Gunilla A Snap shackle
US5117539A (en) * 1991-09-03 1992-06-02 Shrader James P Clasp mechanism
DE4438487A1 (de) * 1993-11-03 1995-05-11 Emil Klingenfus Kg Karabiner für Schmuckketten
US5548875A (en) * 1995-01-18 1996-08-27 Hart; Courtney L. Safety snap

Also Published As

Publication number Publication date
IT248315Y1 (it) 2003-01-28
ITFI990116V0 (it) 1999-09-29
EP1088492A3 (fr) 2002-09-04
ITFI990116U1 (it) 2001-03-29

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