EP4378343A1 - Druckknopf - Google Patents

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Publication number
EP4378343A1
EP4378343A1 EP23213054.2A EP23213054A EP4378343A1 EP 4378343 A1 EP4378343 A1 EP 4378343A1 EP 23213054 A EP23213054 A EP 23213054A EP 4378343 A1 EP4378343 A1 EP 4378343A1
Authority
EP
European Patent Office
Prior art keywords
stud
press
male
female
male 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.)
Pending
Application number
EP23213054.2A
Other languages
English (en)
French (fr)
Inventor
Simone Brezzi
Giulia CASSIANI
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.)
Riri SA
Original Assignee
Riri SA
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 Riri SA filed Critical Riri SA
Publication of EP4378343A1 publication Critical patent/EP4378343A1/de
Pending 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
    • A—HUMAN NECESSITIES
    • A44—HABERDASHERY; JEWELLERY
    • A44B—BUTTONS, PINS, BUCKLES, SLIDE FASTENERS, OR THE LIKE
    • A44B17/00—Press-button or snap fasteners
    • A44B17/0047—Press-button fasteners consisting of three parts
    • A—HUMAN NECESSITIES
    • A44—HABERDASHERY; JEWELLERY
    • A44B—BUTTONS, PINS, BUCKLES, SLIDE FASTENERS, OR THE LIKE
    • A44B17/00—Press-button or snap fasteners
    • A44B17/0064—Details
    • A44B17/0088—Details made from sheet metal

Definitions

  • the present invention relates to a press-stud.
  • the invention has been developed with particular regard to an improved press-stud which also operates correctly in the presence of a transverse traction.
  • Press-studs are generally known and comprise a female element and a male element which can be mutually connected in a disconnectable manner by means of a resiliently deformable engaging member, typically a ring, which is mounted in the female element, in a receiving seat. There can be selectively inserted in the receiving seat, in a connection direction, at least a portion of the male element in order to move from an unbuttoned configuration, in which the male element and the female element are separated and disconnected, to a buttoned configuration, in which the two male and female elements are connected to each other.
  • a stud of this type is known from WO 1997/15207 .
  • press-studs of the type indicated above which are buttoned and unbuttoned by applying a pressure or traction of the two male and female elements, respectively, in the connection direction.
  • a problem of the known studs is that, when they are subjected to constant traction which tends to misalign the components, the retention member tends to take up an oval shape which in the long term causes malfunctions in the stud.
  • the problem is, for example, found in purses, wallets and bill-holders which, when they are full, tend to force the components of the stud, keeping them out of alignment with each other. The force forces the retention ring into an oval shape and, in the long term, this brings about a permanent change in the shape of the retention ring which stops operating as planned.
  • An object of the invention is to solve the problems of the prior art.
  • it is intended to provide an automatic stud which is less subject to wear.
  • it is intended to provide an automatic stud which also does not deteriorate if the components thereof are subjected to a constant force which tends to misalign them and which is, however, convenient and easy to button and unbutton.
  • It is further intended to provide a stud which maintains the functionality thereof even in the presence of a transverse force, that is to say, a force directed in a direction perpendicular to the axes of the components of the stud.
  • Another object is to provide an automatic stud which is compact and not very bulky without this compromising the retention characteristics.
  • Another object is to provide an automatic stud which is aesthetically attractive, well refined in the portions which are visible even when it is unbuttoned. Another object is to provide a stud which does not run the risk of becoming entangled with clothes or objects. It is further intended to provide an automatic stud which requires only minimal modifications for the production processes with respect to the conventional press-studs. Another object is to provide a stud which is economical, simple, reliable to use and secure.
  • a press-stud which comprises a male element and a female element.
  • the male element and the female element may be able to be connected to each other in a connection direction.
  • the female element may comprise a cavity, in which there may be received a resilient retention member.
  • the resilient retention member which is preferably resilient, may comprise an internal annular portion which is suitable for clamping and retaining the connection portion of the male element and a plurality of resiliently deformable external protuberances.
  • the male element may comprise a connection portion, on which there may be formed a restriction. In a connected configuration of the press-stud, the connection portion is inserted in the cavity of the female element with the internal annular portion of the resilient retention member arranged around the restriction.
  • the internal annular portion preferably has a resistance to deformation which is greater than the external protuberances.
  • the stud which is configured in this manner When the stud which is configured in this manner is buttoned, it may be subjected to a transverse traction, that is to say, a traction directed in a direction transverse with respect to the axes of the male and female elements which form it. In this case, the protuberances of the retention member become deformed, avoiding any effect on the internal annular portion which is thereby not subjected to wear. Furthermore, the stud continues to be regularly operative independently of the fact that the respective elements may or may not be coaxial with respect to each other. Therefore, the stud not only continues to remain regularly buttoned even in a misaligned configuration, but may also be unbuttoned by applying thereto an additional traction in a direction parallel with the direction of the male and female elements.
  • a transverse traction that is to say, a traction directed in a direction transverse with respect to the axes of the male and female elements which form it.
  • the protuberances of the retention member become deformed, avoiding
  • a press-stud which comprises a male element and a female element.
  • the female element may comprise a cavity, in which there may be received a resilient retention member.
  • the resilient retention member may comprise an internal annular portion which is suitable for clamping and retaining the connection portion of the male element and a plurality of resiliently deformable external protuberances.
  • the internal annular portion retains its circularity.
  • a press-stud which comprises a male element and a female element, in which, when the stud is in a misaligned configuration, that is to say, when the male element and the female element are not coaxial, remains buttoned and able to be unbuttoned.
  • a press-stud which comprises a male element and a female element having a predefined disengagement force which is defined as the minimum force to be applied to the male and female elements in order to move them apart, disengaging the stud, wherein the disengagement force is independent of a possible misalignment between the male and female elements.
  • the press-stud described in a number of variants has a resilient retention member which comprises an internal annular portion which is suitable for clamping and retaining the connection portion of the male element and a plurality of resiliently deformable external protuberances.
  • a resilient retention member which comprises an internal annular portion which is suitable for clamping and retaining the connection portion of the male element and a plurality of resiliently deformable external protuberances.
  • an external wall of each external protuberance is arranged in contact with an internal edge of a receiving seat for the resilient ring when the stud is in a coaxial buttoned configuration.
  • each external protuberance is preferably elongate and even more preferably is curved.
  • the stud described is particularly compact so as to be able to be used even at locations where a very small stud is required for aesthetic and/or technical reasons. Furthermore, the stud which is formed in this manner does not have any sheet metal edge in view, which could be troublesome, where applicable even sharp or in any case aesthetically unattractive.
  • the stud according to the invention may appear to be generally identical, with regard to the visible components, to a conventional stud.
  • a press-stud 10 comprises a male element 12 and a female element 14.
  • the two elements are fixed to two respective substrates, such as, for example, edges of fabric, pelts, plastics material or the like, in order to be able to button them to each other.
  • the fixing of the male and female elements to the respective substrates can be carried out according to known methods which are therefore not described in detail, for example, by means of riveting, nailing, stitching and other techniques which are generally known in the field.
  • the male element 12 which is depicted is preferably made from brass or another machined metal. It comprises a base 16, discoidal for example, with a face 17 which is intended to be rested during use on the substrate.
  • the base 16 is preferably provided with a perforated cylindrical portion 18 which is coaxial with respect to the discoidal base 16 for the passage, for example, of a fixing member with respect to the substrate, which is not illustrated, for example, a rivet or the like.
  • the perforated cylindrical portion is particularly suitable if the stud is intended to be applied to a thick substrate, such as, for example, leather. Naturally, this is not intended to exclude the possibility of simply providing a hole in the discoidal base in place of the perforated cylindrical portion 18.
  • connection portion 20 projects from the base 16 of the male element 12 from a face 19 of the base 16 opposite the face 17 which is intended to be rested on the substrate during use.
  • the connection portion 20 is intended to connect the male element 12 to the female element 14.
  • the connection portion 20 comprises a substantially tubular member 22 which is generally narrower than the discoidal base 16 and which projects with respect to the discoidal base 16 from the face 19.
  • the tubular member 22 has a head 24 with a diameter D1.
  • the tubular member 22 is provided with a restriction 31 on the lateral wall 26 thereof.
  • the tubular member 22 narrows to a diameter D2 which is less than the diameter D1 of the head 24.
  • the female element 14 which is shown in detail in Figures 3, 4 and 5 comprises a base 50 which is substantially planar, with a face 52 which is intended to be rested on the substrate during use, and from which there extends a tubular member 55 which forms a receiving cavity or seat 54 for the connection portion 20 of the male element 12 and a receiving seat 60 for a resilient return member.
  • the base 50 is preferably provided with a central hole 53 for fixing the element to a substrate, for example, for the introduction of a fixing member (not illustrated) such as a rivet or the like.
  • a resilient return member which is preferably a resilient ring 62.
  • the receiving seat 60 is closed by an annular retention edge 64 which prevents the resilient ring 62 from leaving the receiving seat 60.
  • the annular retention edge 64 is preferably made from a shaped metal sheet.
  • the resilient ring 62 preferably comprises an internal portion 65 which is suitable for clamping and retaining the connection portion 20 of the male element 12 in the region of the restriction 31 and a series of external protuberances 66.
  • Each external protuberance 66 is preferably elongate.
  • end portions 68 of the protuberances 66 are preferably arranged in contact with an internal edge 70 of the receiving seat 60.
  • the protuberances can be compressed, deformed and are resilient.
  • the internal portion 65 preferably has notches 72.
  • the internal annular portion 65 is made from a material and/or with a shape so as to have a resistance to deformation which is greater with respect to the external protuberances 66.
  • the external protuberances 66 are more flexible than the internal annular portion 65.
  • the male element 12 and the female element 14 of the press-stud 10 are fixed to two substrates which it is desirable to button together, respectively.
  • the male element 12 is positioned with a longitudinal axis A thereof substantially coincident with the axis B of the female element 14.
  • the head 24 of the male element 12 is rested on the opening of the receiving seat 54 of the female element 14.
  • the two male 12 and female 14 elements are pressed against each other in a connection direction which is substantially parallel with the longitudinal axis B of the female element with such a pressure as to allow the connection portion 20 of the male element 12 to deform the resilient ring 62 sufficiently to allow the introduction thereof.
  • the resilient ring 62 passes the head 24, it resiliently narrows around the restriction 31 of the connection portion 20, retaining the connection portion 20 in the receiving seat 54 of the female element in a buttoned configuration of the press-stud 10.
  • the resilient ring 62 presses against the connection portion 20 and the head, with a greater diameter with respect to the diameter of the restriction, prevents the release of the connection portion 20 under light stress conditions. It may be noted that, in this configuration, the male element 12 and female element 14 are resting one against the other, with the face 19 of the discoidal base 16 of the male element 12 in contact with the annular retention edge 64 of the female element.
  • a traction which is intended to move the two male 12 and female 14 elements apart from each other, as for conventional press-studs.
  • the movement is normally in the axial direction and/or of the combined axial and rotational type.
  • the traction applied brings about a widening of the internal annular portion 65 of the resilient ring 62 until generating sufficient space for the head 24 to pass the male element.
  • the stud which is in the closed configuration of Figure 1 may be subjected to a lateral tension, that is to say, a tension which is substantially transverse with respect to the connection direction.
  • a lateral tension that is to say, a tension which is substantially transverse with respect to the connection direction.
  • the female element 14 and the male element 12 tend to move laterally in translation with respect to each other, as shown in Figure 2 .
  • the stud In the translated configuration of Figure 2 , that is to say, in the configuration in which the male element and female element are subjected to an external force which brings about the lateral translational movement thereof, the stud maintains unaffected the properties of retaining the resilient ring on the connection portion 20.
  • the stud may in any case be disengaged by acting normally in order to move the male element and the female element apart from each other in an axial direction.
  • the female element is able to effectively retain the male element and at the same time allows a regular disengagement, by applying thereto a force in an axial direction, even in the presence of a transverse force.
  • the disengagement force necessary for unbuttoning it is independent of any misalignment between the male element and female element, that is to say, in a translated configuration the stud can be unbuttoned by applying thereto the same disengagement force necessary for unbuttoning it in an aligned configuration.
  • the external protuberances 66' apply a force counter to the external force which is applied to the stud, which tends to bring the tubular member 22 back into the centred position in the receiving seat.
  • the male and female elements are again aligned as a result of the effect of the external protuberances 66' which tend to take up the original shape thereof.
  • the resilient ring 62 has, according to the embodiment used in the stud of the preceding Figures, a plurality of protuberances 66 which are arranged radially around the central annular portion 65, the protuberances of each pair of adjacent protuberances 66a and 66b are mutually symmetrical.
  • the two adjacent protuberances 66a and 66b are divergent so as to form a wide U-shape.
  • Figures 8 and 9 show a resilient ring 162 according to a first variant.
  • the external protuberances 166 are arranged radially around the central annular portion 65; the protuberances of each pair of adjacent protuberances 166a and 166b are mutually symmetrical.
  • the two adjacent protuberances 166a and 166b are convergent so as to form together a split ring. This does not exclude a variant which is not illustrated and in which each lateral protuberance forms a closed ring.
  • Figures 10 and 11 show a resilient ring 262 according to a second variant.
  • the external protuberances 266 are arranged radially around the central annular portion 65; the protuberances of each pair of adjacent protuberances 266a and 266b are mutually symmetrical.
  • the two adjacent protuberances 266a and 266b are divergent so as to form a V-shape.
  • a resilient ring 362 according to a third variant is shown in Figures 12 and 13 .
  • the external protuberances 366 are arranged radially around the central annular portion 65 and are curved out of the plane in which the ring is located.
  • Figures 14 and 15 show a resilient ring 462 according to a second variant.
  • the external protuberances 466 are also arranged radially around the central annular portion 65.
  • Each protuberance 466 is formed with a neck 467 and a head 469, with a transverse dimension greater than the neck.
  • protuberances which are elongate and curved in the plane in which the ring is located or outside the plane in order to make them more readily deformable.
  • the protuberances 66, 166, 266, 366, 466 have end walls 68, 168, 268, 368, 468 which are arranged in contact with the internal edge 70 of the receiving seat 60 for the resilient ring which is provided in the female element 14.
  • Figures 16 and 17 show a variant of a stud 10', in which the male element 12' is produced by deep-drawing.
  • the male element 12' comprises a base 16' which is, for example, discoidal and from which there projects the connection portion 20 which has the same characteristics discussed above for the male element 12 of the stud 10.
  • the base 16' terminates in a bent edge 17' which is intended to rest during use on the substrate to which it is desirable to fix it.

Landscapes

  • Snaps, Bayonet Connections, Set Pins, And Snap Rings (AREA)
EP23213054.2A 2022-12-02 2023-11-29 Druckknopf Pending EP4378343A1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT202200024921 2022-12-02

Publications (1)

Publication Number Publication Date
EP4378343A1 true EP4378343A1 (de) 2024-06-05

Family

ID=85173059

Family Applications (1)

Application Number Title Priority Date Filing Date
EP23213054.2A Pending EP4378343A1 (de) 2022-12-02 2023-11-29 Druckknopf

Country Status (1)

Country Link
EP (1) EP4378343A1 (de)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1997015207A1 (en) 1995-10-20 1997-05-01 Cobra S.R.L. Press-stud
WO2022254297A1 (en) * 2021-06-04 2022-12-08 Riri S.A. Improved press-stud

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1997015207A1 (en) 1995-10-20 1997-05-01 Cobra S.R.L. Press-stud
WO2022254297A1 (en) * 2021-06-04 2022-12-08 Riri S.A. Improved press-stud

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