EP0811334A1 - Mécanisme à friction d'un support pour bâton de produits pâteux - Google Patents

Mécanisme à friction d'un support pour bâton de produits pâteux Download PDF

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Publication number
EP0811334A1
EP0811334A1 EP96830328A EP96830328A EP0811334A1 EP 0811334 A1 EP0811334 A1 EP 0811334A1 EP 96830328 A EP96830328 A EP 96830328A EP 96830328 A EP96830328 A EP 96830328A EP 0811334 A1 EP0811334 A1 EP 0811334A1
Authority
EP
European Patent Office
Prior art keywords
tubular body
holder according
outer tubular
inner tubular
bodies
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Withdrawn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
EP96830328A
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German (de)
English (en)
Inventor
Stefano Vanoncini
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.)
Brivaplast Srl
Original Assignee
Brivaplast 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 Brivaplast Srl filed Critical Brivaplast Srl
Priority to EP96830328A priority Critical patent/EP0811334A1/fr
Publication of EP0811334A1 publication Critical patent/EP0811334A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • A—HUMAN NECESSITIES
    • A45—HAND OR TRAVELLING ARTICLES
    • A45D—HAIRDRESSING OR SHAVING EQUIPMENT; EQUIPMENT FOR COSMETICS OR COSMETIC TREATMENTS, e.g. FOR MANICURING OR PEDICURING
    • A45D40/00—Casings or accessories specially adapted for storing or handling solid or pasty toiletry or cosmetic substances, e.g. shaving soaps or lipsticks
    • A45D40/06—Casings wherein movement of the lipstick or like solid is a screwing movement

Definitions

  • the present invention relates to a frictioned-mechanism holder for paste products in a stick farm, of the type comprising: an outer tubular body; an inner tubular body coaxially and rotatably engaged in the outer tubular body; a cup axially slidable in the inner tubular body and arranged to hold a paste product in a stick form; interconnecting means operatively disposed on the cup, the inner tubular body and the outer tubular body to cause an axial translation of the cup as a result of a relative rotation between said tubular bodies; mechanical-friction spring means acting in an axial thrust relationship between the inner and outer tubular bodies to generate a controlled friction when a relative rotation between said bodies takes place.
  • the holder in accordance with the invention is particularly conceived for containing lipsticks, and in the progress of the present description reference will be particularly made to these products.
  • the use of the holder in reference for containing other types of paste products in a stick form is not to be excluded, which products may be of medical and cosmetic use for example, and/or involve personal hygiene products to be applied to the skin.
  • holders of this type are essentially comprised of an outer tubular body coaxially and rotatably fitted on an inner tubular body along which a cup holding the lipstick or the like is slidably guided.
  • Interconnecting means is operatively associated with the cup and the outer and inner tubular bodies in such a manner that, as a result of a relative rotation between the tubular bodies, the cup is submitted to an axial translation causing the lipstick to be elevated from or lowered into the holder.
  • a high-viscosity lubricant having a dual function, i.e. compensating for the unavoidable coupling plays between the bodies resulting from working tolerances, and providing an appropriate resistance to the relative rotational movement of the tubular bodies so that, on operation, the user is given a feeling of smooth and progressive swivelling.
  • the above lubricating oils by coming into contact with the lipstick, tend to cause partial melting of the latter and/or to get stained by the lipstick pigments, so that the user has the impression that the lipstick has partly melted and soiled the holder's inner surfaces.
  • European Patent EP 0 439 381 discloses a lipstick holder provided with an annular element fixed by fitting on a bottom portion of the inner tubular body and provided with a plurality of circumferentially distributed spring fins projecting from one edge of the ring, in a direction substantially parallel to the geometrical axis thereof.
  • the fins are interposed between the inner tubular body and the outer tubular body thereby acting in radial spring thrust relationship with a cylindrical abutment surface internally formed in the outer tubular body itself.
  • the tubular element lends itself to be driven in rotation integrally with the inner tubular body, so that the spring fins exert the desired frictional force, by their rubbing against the above mentioned cylindrical abutment surface.
  • the annular element provided with spring fins is a piece of a rather complicated geometrical configuration.
  • production costs are further increased by the necessity to arrange appropriate fitting means between the finned annular element and the bottom portion of the inner tubular element.
  • a certain increase in the production costs is also due to the fact that the geometrical configuration of the inner and outer tubular bodies needs to be greatly modified in comparison to the more traditional solutions, so as to arrange the fitting means for the finned tubular element on the former and the cylindrical abutment surface on the latter.
  • the degree of elastic deformation to be imparted to the fins during the assembling step must be necessarily limited in order to be able to give sufficient quaranties of a correct fitting of the fins into the end portion of the outer tubular body.
  • mounting of the finned annular element must be carried out with some care and accuracy to avoid damaging the fins in case of imperfect centering of the ring with respect to the end portion of the outer tubular body.
  • this embodiment does not carry out any compensation for axial plays between the outer and inner tubular bodies, in that the action of the elastic fins is only able to compensate for plays in a radial direction.
  • Another known solution for achieving a mechanical frictional effect between the outer and inner tubular bodies essentially consists in providing elastic fins directly in the inner tubular body by appropriate cuts formed therein directly during the moulding step. Formed on the spring portions confined by the cuts are, during the moulding step as well, friction projections radially jutting out of the inner tubular body. When the inner tubular body is fitted into the outer tubular body, the friction projections interfere with the inner cylindrical surface of the outer tubular body, elastically preloading the fins. Under this situation the friction projections elastically act on the inner cylindrical surface, so as to create the required friction force for rotation between the inner and outer tubular bodies.
  • European Patent EP 0 207 114 discloses a lipstick holder in which the friction mechanism comprises a pair of flexibile fins, each fin being accomplished by two circumferential cuts arranged close to the bottom portion of the inner tubular body. Each flexible portion carries a friction pin projecting radially outwardly and arranged to elastically act in axial thrust relationship against an end edge of the outer tubular body.
  • annular element that can be elastically deformed in the axial direction and is operatively interposed between abutment shoulders carried by the inner tubular body and outer tubular body, respectively.
  • said controlled-friction spring means comprises: a first circumferential abutment shoulder carried by the inner tubular body; a second circumferential abutment shoulder carried by the outer tubular body; an annular spring element operatively interposed in axial precompression relationship between the first and second abutment shoulders.
  • a frictioned-mechanism holder for paste products in a stick form in accordance with the present invention has been generally identified by reference numeral 1.
  • Holder 1 comprises an inner tubular body 2 having a bottom end portion 3 intended for carrying a base body (not shown, as known in itself) capable of engagement with the bottom portion itself, by forced fitting for example.
  • an outer tubular body 4 Coaxially fitted on the inner tubular body 2 is an outer tubular body 4 that, in a manner known per se, can be covered with an outer surrounding sheath 5 of metal material.
  • cup 6 Slidably guided in the inner tubular body 2 is a so-called cup 6 usually designed to engage a lipstick 6a or other paste products in a stick form.
  • the cup 6 is connected to the inner 2 and outer 4 tubular bodies by interconnecting means, by effect of which the cup 6 is selectively elevated or retracted, that is moved apart from or close to the bottom end portion 3, as a result of relative rotations between the tubular bodies.
  • the interconnecting means comprises a pair of slide pins 7 radially projecting at diametrically opposite positions from the cup and slidably moving along respective guide slots 8 formed longitudinally in the inner tubular body 2 to be then inserted into at least one helical groove 9 formed in the inner cylindrical surface of the outer tubular body 4.
  • Holder 1 further comprises mechanical-friction spring means 10 acting in axial thrust relationship between the outer 4 and inner 2 tubular bodies to generate a controlled friction to the relative rotation between the last mentioned bodies.
  • This mechanical-friction means 10 comprises at least one annular element 11 operatively interposed between a first circumferential abutment shoulder 12 and a second circumferential abutment shoulder 13, carried by the inner tubular body 2 and outer tubular body 4 respectively, and extending in parallel planes perpendicular to the relative-rotation geometrical axis "Y" of the tubular bodies.
  • the annular element 11 which also extends substantially in a plane perpendicular to axis "Y" of the tubular bodies, is capable of elastic deformation in an axial direction and is enclosed between the first and second abutment shoulders, 12 and 13 respectively, in a condition of elastic deformation under axial compression, so as to exert a spring contrast action on the abutment shoulders 12 and 13 tending to move said shoulders apart from each other.
  • the spring action of the annular element 11 is counteracted by an auxiliary shoulder 14 radially projecting outwardly from an upper end 2a of the inner tubular body 2 and acting against the corresponding upper end 4b of the outer tubular body 4.
  • the first abutment shoulder 12 is formed close to the bottom portion 3 of the inner tubular body 2, and projects radially outwardly close to said bottom portion.
  • the second abutment shoulder 13 is substantially constituted by the terminal edge of a lower end 4a in the outer tubular body, in facing relationship with said bottom portion 3.
  • the annular spring element 11 is made of a plastic material and has a substantially quadrangular profile in cross-section, one side thereof being disposed in a plane perpendicular to its own geometrical axis, that is parallelly to the abutment shoulders 12, 13. Homogeneously distributed along the circumferential extension of the annular element 11 is a plurality of portions 15 capable of elastic deformation by effect of the axial stresses to which the spring element is subjected.
  • the annular element 11 is provided to have an undulated circumferential extention so that each portion 15 capable of elastic deformation is defined by a lower half-wave 15a and an upper half-wave 15b consecutively alternated and projecting from opposite sides with respect to a common median plane "X" perpendicular to the geometrical axis of the annular element 11.
  • a preferential solution defined on the circumferential extension of the annular element are at least three lower half-waves 15a designed to act against the first abutment shoulder 12, alternated with three upper half-waves 15b acting against the second shoulder 13.
  • portions 15 capable of elastic deformation on shoulders 12, 13 ensures complete elimination of any axial play between the inner 2 and outer 4 tubular bodies while at the same time generating an appropriate frictional resistance to the relative rotation between the tubular bodies themselves.
  • the frictional resistance value can be easily controlled during the planning step, by an appropriate selection of the amplitude "h” given to undulations on the circumferential extension of the annular spring element 11, keeping into account the nominal distance "d” intervening between the abutment shoulders 12, 13.
  • value "h” to be measured between the apices of the lower 15a and upper 15b half-waves when the annular element 11 is in a rest condition is provided to be greater than the axial distance "d” intervening between the abutment shoulders 12, 13, so that, when the annular element has been mounted, it will be submitted to some axial precompression, previously set during the planning step.
  • the invention offers the greatest planning freedom in selecting the amplitude to be given to undulations in the annular spring element 11, for achieving the desired frictional resistance, without said resistance being affected by the inevitable occurrence of deviations from the nominal measurements, due to working tolerances.
  • annular spring element 11 is made separately from the other holder components, there is a complete freedom in selecting the materials to make it, which selection may in particular aim at achieving the required elasticity features.
  • annular element 11 is completely insensitive to possible oval deformations between the inner 2 and outer 4 tubular bodies, which on the other hand can be easily compensated for by arranging an appropriate hollow space between the outer and inner cylindrical surfaces of said bodies.

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  • Cosmetics (AREA)
EP96830328A 1996-06-06 1996-06-06 Mécanisme à friction d'un support pour bâton de produits pâteux Withdrawn EP0811334A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP96830328A EP0811334A1 (fr) 1996-06-06 1996-06-06 Mécanisme à friction d'un support pour bâton de produits pâteux

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP96830328A EP0811334A1 (fr) 1996-06-06 1996-06-06 Mécanisme à friction d'un support pour bâton de produits pâteux

Publications (1)

Publication Number Publication Date
EP0811334A1 true EP0811334A1 (fr) 1997-12-10

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ID=8225933

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EP96830328A Withdrawn EP0811334A1 (fr) 1996-06-06 1996-06-06 Mécanisme à friction d'un support pour bâton de produits pâteux

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EP (1) EP0811334A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107232735A (zh) * 2017-04-10 2017-10-10 浙江阿克希龙舜华铝塑业有限公司 中束芯
IT202300023232A1 (it) * 2023-11-06 2025-05-06 Mauro Grioni Dispositivo erogatore di tipo migliorato per stick cosmetici in genere

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1986003658A1 (fr) * 1984-12-18 1986-07-03 L'oreal Dispositif pour appliquer un produit pateux, notamment un produit cosmetique tel que du rouge a levres, et element tubulaire pour un tel dispositif
EP0709042A1 (fr) * 1994-10-26 1996-05-01 Risdon Corporation Distributeur de produit cosmétique avec un anneau à flexion pour frottement en rotation

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1986003658A1 (fr) * 1984-12-18 1986-07-03 L'oreal Dispositif pour appliquer un produit pateux, notamment un produit cosmetique tel que du rouge a levres, et element tubulaire pour un tel dispositif
EP0207114A1 (fr) * 1984-12-18 1987-01-07 Oreal Dispositif pour appliquer un produit pateux, notamment un produit cosmetique tel que du rouge a levres, et element tubulaire pour un tel dispositif.
EP0709042A1 (fr) * 1994-10-26 1996-05-01 Risdon Corporation Distributeur de produit cosmétique avec un anneau à flexion pour frottement en rotation

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107232735A (zh) * 2017-04-10 2017-10-10 浙江阿克希龙舜华铝塑业有限公司 中束芯
CN107232735B (zh) * 2017-04-10 2023-09-29 浙江阿克希龙舜华铝塑业有限公司 中束芯
IT202300023232A1 (it) * 2023-11-06 2025-05-06 Mauro Grioni Dispositivo erogatore di tipo migliorato per stick cosmetici in genere

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