EP2220956A1 - Élément élastique pour boutons à pression - Google Patents

Élément élastique pour boutons à pression Download PDF

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Publication number
EP2220956A1
EP2220956A1 EP09153184A EP09153184A EP2220956A1 EP 2220956 A1 EP2220956 A1 EP 2220956A1 EP 09153184 A EP09153184 A EP 09153184A EP 09153184 A EP09153184 A EP 09153184A EP 2220956 A1 EP2220956 A1 EP 2220956A1
Authority
EP
European Patent Office
Prior art keywords
parts
elastic
arched
pin
elastic element
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Withdrawn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
EP09153184A
Other languages
German (de)
English (en)
Inventor
Lorenzo Zanella
Andrea Zanella
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.)
Zanella Srl
Original Assignee
Zanella Srl
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 Zanella Srl filed Critical Zanella Srl
Priority to EP09153184A priority Critical patent/EP2220956A1/fr
Publication of EP2220956A1 publication Critical patent/EP2220956A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • A—HUMAN NECESSITIES
    • A44—HABERDASHERY; JEWELLERY
    • A44B—BUTTONS, PINS, BUCKLES, SLIDE FASTENERS, OR THE LIKE
    • A44B17/00—Press-button or snap fasteners
    • A44B17/0011—Press-button fasteners in which the elastic retaining action is obtained by a spring working in the plane of the fastener

Definitions

  • the present patent relates to snap fasteners and in particular concerns a new elastic element for female parts suited to retain the pin of male parts of snap fasteners.
  • Snap fasteners consist of two disc-shaped parts, male and female, which can be coupled.
  • the female part is provided with a central a hole or seat, the edge of said hole or seat housing an elastic element.
  • the centre of the male part is provided with a pin with mushroom-shaped profile, i.e. with end having a larger diameter than the body of the pin.
  • the hole or seat of the female part houses the pin of the male part.
  • the elastic element of the female part When at rest, the elastic element of the female part is provided with an opening or internal diameter that is smaller than the diameter of the end or head of the pin of the male part and substantially equal to or slightly smaller than the diameter of the body of the pin of the male part.
  • the two parts, male and female, are coupled by inserting the pin of the male part into the hole or seat of the female part through the elastic element of said female part.
  • Said insertion/coupling entails the elastic element of the female part being widened by the passage of the end of the pin of the male part and then contracting, due to its elastic properties, around the body of the pin of the male part.
  • the resistance due to the elastic properties of said elastic element retains the end of said pin of the male part in the hole or seat of said female part, preventing it from accidentally coming out.
  • Elastic elements for snap fasteners are known which have various shapes, the main ones being:
  • Snap fasteners are known in which the elastic element of the female part is replaced by the edge of the opening of said female part divided into elastic portions which resist the passage of the end of the pin of the male part.
  • the known elastic elements have various drawbacks.
  • the ring and omega-shaped elastic elements are normally obtained by bending metal wire and require specific equipment and machines for their production.
  • the ring-shaped elastic elements have a constant section and are stressed at various points of their shape.
  • the constant section is sized as a compromise between resistance to wear produced by the passage of the pin of the male part and the elasticity necessary to expand when said pin of said male part passes through.
  • the widening stress is therefore exerted at a generically intermediate point between the two facing ends of the open ring shape or in the area of least resistance of the material. Said repeated stress can cause the elastic element to break, making the snap fastener unserviceable.
  • the omega-shaped elastic elements are stressed during bending at their bending points, i.e. at the points where the metal has already been mechanically bent and where the radius of curvature is small. Due to said small radius of curvature, the portions subjected to bending can easily break. To remedy all the above drawbacks, a new elastic element for snap fasteners has been devised and produced.
  • One object of the new elastic element for snap fasteners is to resist the continuous stress due to the passage of the pin of the male part.
  • a further object of the new elastic element is to prevent the pin of the male part from accidentally coming out of the female part of the snap fastener.
  • a further object of the new elastic element is to eliminate the need for specific machines or equipment for its production.
  • a further object of the new elastic element is to reduce or eliminate the noise resulting from insertion of the pin of the male part into the female part of the snap fastener.
  • the new elastic element for snap fasteners having a generically closed ring shape, formed by two substantially rigid arched parts, joined at one end by a third flexible part acting as a hinge, and joined at the other end by a fourth elastic part having the function of maintaining said two arched parts close to each other.
  • the two arched parts have a radius of curvature substantially equal to the hole or seat of the female part of the snap fastener and together are shorter than the circumference of the hole or seat of the female part of the snap fastener.
  • the third flexible part acting as a hinge can have any shape suitable for the purpose of permitting rotation between said two arched parts.
  • Said third flexible part has a preferably arched shape with smaller radius than said first two arched parts.
  • the fourth elastic part having the function of keeping said two arched parts close to each other can have any shape suitable for the purpose of maintaining adjacent the ends of the two arched parts opposite the third flexible part acting as a hinge.
  • Said fourth elastic part preferably has the shape of a multiple wave, i.e. formed of alternately opposing curves.
  • the first two arch-shaped parts have a constant width or section suitable for giving said parts rigidity and resistance to the stress caused by the pin of the male part of the snap fastener.
  • the third flexible part acting as a hinge can have a width or section equal to or smaller than the width or section of the two arched parts.
  • the fourth elastic part has a width or section smaller than the width or section of the two arched parts, in such a way as to be sufficiently flexible and elastic.
  • the new elastic element for snap fasteners can be produced in any elastic stainless material, for example stainless spring steel or, more preferably, plastic.
  • the new elastic element for snap fasteners is housed in the hole or seat of the female part of the snap fastener.
  • the two arched parts maintain their shape
  • the third flexible part bends or bends in the area of connection with said two arched parts allowing the two arched parts to expand with a reciprocal rotation movement
  • the fourth elastic part modifies its shape allowing said two arched parts to expand.
  • the fourth elastic part of said new elastic element closes the arched parts so that they assume their previous position. If the stem of the pin of the male part of the snap fastener has a greater section than the distance of said arched parts in the rest position, said fourth elastic part of the new elastic element re-closes said arched parts of the new elastic element in contact with said stem of said pin.
  • the fourth elastic part of said new elastic element After extraction of the pin of the male part from the female part of the snap fastener, the fourth elastic part of said new elastic element re-closes the arched parts to their rest position.
  • the new elastic element (E) for snap fasteners has a generically closed ring shape formed by two substantially rigid arched parts (E1, E2) joined at one end by a third flexible part (E3) acting as a hinge and joined at the other end by a fourth elastic part (E4) having the function of keeping said two arched parts close to each other.
  • the two arched parts (E1, E2) have a radius of curvature substantially equal to the hole or seat of the female part of the snap fastener and together they are shorter than the circumference of the hole or seat of the female part of the snap fastener.
  • the third flexible part (E3) acting as a hinge, has an arched form with smaller radius than said first two arched parts (E1, E2).
  • said third flexible part (E3) has the convex side towards the centre of the elastic element (E).
  • the fourth elastic part (E4) having the function of keeping said two arched parts (E1, E2) close together, has a multiple wave or sinusoidal shape, i.e. formed by alternately opposing curves (Ea, Eb, Ec, ..., En).
  • Said fourth elastic part (E4) has a section smaller than the width or section of the two arched parts (E1, E2), in such a way as to be sufficiently flexible and elastic.

Landscapes

  • Slide Fasteners, Snap Fasteners, And Hook Fasteners (AREA)
EP09153184A 2009-02-19 2009-02-19 Élément élastique pour boutons à pression Withdrawn EP2220956A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP09153184A EP2220956A1 (fr) 2009-02-19 2009-02-19 Élément élastique pour boutons à pression

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP09153184A EP2220956A1 (fr) 2009-02-19 2009-02-19 Élément élastique pour boutons à pression

Publications (1)

Publication Number Publication Date
EP2220956A1 true EP2220956A1 (fr) 2010-08-25

Family

ID=40802016

Family Applications (1)

Application Number Title Priority Date Filing Date
EP09153184A Withdrawn EP2220956A1 (fr) 2009-02-19 2009-02-19 Élément élastique pour boutons à pression

Country Status (1)

Country Link
EP (1) EP2220956A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109907443A (zh) * 2019-03-05 2019-06-21 天王电子（深圳）有限公司 折叠扣及手表

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE398635C (de) * 1924-07-17 Louis Witte Oeillets Und Metal Druckknopf
FR1597718A (fr) * 1967-12-28 1970-06-29
DE19919399A1 (de) * 1998-04-28 1999-11-04 Cobra Srl Oberteil eines Druckknopfes
US6067694A (en) * 1995-10-20 2000-05-30 Cobra Trade S.A. Press-stud

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE398635C (de) * 1924-07-17 Louis Witte Oeillets Und Metal Druckknopf
FR1597718A (fr) * 1967-12-28 1970-06-29
US6067694A (en) * 1995-10-20 2000-05-30 Cobra Trade S.A. Press-stud
DE19919399A1 (de) * 1998-04-28 1999-11-04 Cobra Srl Oberteil eines Druckknopfes

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109907443A (zh) * 2019-03-05 2019-06-21 天王电子（深圳）有限公司 折叠扣及手表

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