EP3638071A1 - Hairstyle accessory - Google Patents

Hairstyle accessory

Info

Publication number
EP3638071A1
EP3638071A1 EP18733687.0A EP18733687A EP3638071A1 EP 3638071 A1 EP3638071 A1 EP 3638071A1 EP 18733687 A EP18733687 A EP 18733687A EP 3638071 A1 EP3638071 A1 EP 3638071A1
Authority
EP
European Patent Office
Prior art keywords
accessory
net structure
net
curved portions
shore
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.)
Granted
Application number
EP18733687.0A
Other languages
German (de)
French (fr)
Other versions
EP3638071B1 (en
Inventor
Ingrid PAOLETTI
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.)
Politecnico di Milano
Original Assignee
Politecnico di Milano
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 Politecnico di Milano filed Critical Politecnico di Milano
Publication of EP3638071A1 publication Critical patent/EP3638071A1/en
Application granted granted Critical
Publication of EP3638071B1 publication Critical patent/EP3638071B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

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
    • A45D8/00—Hair-holding devices; Accessories therefor
    • A45D8/40—Hair-nets; Hair-protecting caps
    • 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
    • A45D8/00—Hair-holding devices; Accessories therefor
    • A45D8/34—Hair-braid holders; Hair-plait holders

Definitions

  • the present invention relates to hairstyle accessories, in particular accessories for tying hair up, e.g. nets for buns.
  • this type of hairstyle a bundle of hair is gathered to form a ball typically positioned at the nape. Due to the position and the mass of hair, to maintain the hairstyle, the use of a net, typically made of nylon or crocheted wool, is known.
  • An example of an accessory able to form and hold in position a bun is described in patent US 3,693,637.
  • a limit of current nets for buns is that they are delicate and do not maintain the shape effectively. For example, dancers perform jumps and dance steps that put strain on the hairstyle, therefore very often as well as the net it is necessary to use hairspray or other products, e.g. hairpins, which help to maintain the shape of the bun.
  • these nets are subject to wear, in particular wear from water.
  • the problem underpinning the present invention is that of improving existing hairstyle accessories.
  • an object of the present invention is that of presenting a hairstyle accessory that allows a bun hairstyle to be maintained effectively.
  • the invention therefore relates to a hairstyle accessory, comprising a net structure provided with an opening for inserting a hair bundle, the net structure being composed of a plurality of net meshes and being suitable to hold hair therein.
  • the net structure is made of a single material, and each net mesh has a pattern such to give to the net structure auxetic properties.
  • the net structure has a spherical or ellipsoidal shape, meaning that it lies on a spherical or ellipsoidal surface. These shapes are well suited to a bun hairstyle; furthermore, the spherical, or substantially spherical shape, is suited to a particularly uniform expansion.
  • the pattern that is repeated is composed of three curved portions connected two by two at a vertex, each one of said three curved portions being composed of a pair of circular arcs having equal length and curvature, but having opposite concavities.
  • This triangular based pattern called hexachiral (described in the article "Auxetic mechanical metamaterials", H.M.A. Kolken and A.A. Zadpoor, The Royal Society of Chemistry 2017, p. 5111-5129) is well suited to a spherical shape in general as the triangular based optimisation is the one that is most adaptable to the curvature.
  • the curved portions in the area proximal to the opening of the net structure, have a greater length and comprise arcs (201) having a curvature greater than curved portions arranged in a position distal from the opening. This allows greater stretching of the mesh, therefore a larger expansion and greater resistance in the area of greatest strain.
  • the net is made with elastomer polymers of different types, e.g. such structure can be made with silicone rubber with (i) hardness ranging from Shore A 8 to Shore A 100, and more preferably with hardness ranging from Shore A 10 to Shore A 40, and (ii) elasticity ranging from 100% to 1000% and more preferably ranging from 300% to 400% .
  • FIG. 1 illustrates a hairstyle accessory according to an embodiment of the present invention
  • figure 2 illustrates a sectional view of the accessory of figure 1;
  • figure 3 illustrates the accessory of figure 1 and some details thereof.
  • figure 4 illustrates a variant of the accessory of figure 1.
  • the hairstyle accessory 1 comprises a net structure 2 with a spherical shape having diameter D e which, in the example described here, is 55 mm.
  • D e diameter which, in the example described here, is 55 mm.
  • the measurements are not to be interpreted in the limiting sense and the object could be reproduced in different sizes according to the intended use, e.g. it may be possible to produce one accessory for children and one for adults, therefore of different sizes according to the mass of hair to be gathered.
  • the net structure 2 is made of a single material and has a plurality of meshes characterised by a triangular based pattern 20 that is repeated so as to guarantee auxetic properties, i.e. a negative Poisson coefficient, to the net structure.
  • the accessory 1 is made of elastomer and in particular silicone rubbers with (i) hardness ranging from Shore A8 to Shore A100, and more preferably with hardness ranging from Shore A10 to Shore A40, and (ii) elasticity, measured as elongation ability, i.e. return without breaking, ranging from 100% to 1000% and more preferably ranging from 300% to 400% .
  • silicone rubbers with (i) hardness ranging from Shore A8 to Shore A100, and more preferably with hardness ranging from Shore A10 to Shore A40, and (ii) elasticity, measured as elongation ability, i.e. return without breaking, ranging from 100% to 1000% and more preferably ranging from 300% to 400% .
  • the material used is waterproof, which also allows it to be used under the shower or for water sports, such as swimming.
  • the accessory is made of a single material, i.e. by injection moulding, or compression forming or processing through other known techniques, a single material that may comprise a single element / chemical product or mixture of elements / chemical products, e.g. a mixture of silicone rubbers.
  • the triangular pattern 20, clearly visible in figure 3, is made through three curved portions 200 connected two by two at a vertex of the triangle. Each of the three curved portions 200 is composed of two arcs 201 having equal length but opposite concavity.
  • each arc 201 is an arc of a circumference having radius (Rl) 3.5 mm and the total length (LI) of the curved portion 200 is 14.9 mm.
  • each curved portion 200 is composed of a strip of material having a square cross section, with dimensions 's' of 2 mm x 2 mm (Fig.2). It is however clear that curved portions can be provided with cross sections of different sizes and/ or shapes. For example, the section could be circular or curved.
  • the latter In order to insert hair into the accessory 1, the latter has an inlet opening 3 whose edges are composed of a plurality of curved portions 201 each belonging to a different pattern of the net structure.
  • the mesh has an identical pattern 20 that is repeated along the whole surface of the accessory 1.
  • the net structure has a plurality of meshes each still composed by a triangular based pattern composed of three curved portions composed of equal and opposite arcs.
  • the size of the meshes changes.
  • the length of the curved portions, the curvature of the arcs and the thickness of the material that forms the curved portions may change along the surface of the net structure.
  • the design of the meshes in the region proximal to the opening 3, where the bun is subjected to greater strain is designed to allow greater elongation of the triangles, therefore a larger expansion.
  • the pattern of the mesh is composed of curved portions with a greater length and arcs having a greater curvature with respect to corresponding patterns that are in a distal position with respect to the opening 3.
  • the curved portions may have the dimensions and curvatures described above with reference to figure 3, in the proximal position to the opening the curved portions may have a length (L2) of 17.9 mm and be composed of arcs having a radius of curvature (R2) of 4.5 mm.
  • the net structure is composed, in actual fact, of different meshes, that have the same triangular based pattern, but different lengths and curvatures of the curved portions.
  • the accessory 1 may comprise a net structure comprising a plurality of meshes each composed of a pattern of another shape that, however, allows the auxetic features of the net structure to be maintained.
  • a pattern e.g. of the type described in WO2016144406A1.
  • the shape of the accessory does not necessarily have to be spherical, but may also be oval or similar according to the amount of hair to be contained, to allow an optimisation of the hold.
  • the spherical or substantially spherical shape is preferred to guarantee the auxetic properties of the accessory.

Landscapes

  • Toys (AREA)
  • Cosmetics (AREA)
  • Adornments (AREA)

Abstract

A hairstyle accessory (1), comprising a net structure (2) provided with an opening (3) for inserting a hair bundle, the net structure (2) being composed of a plurality of net meshes and being suitable to hold hair therein. The net structure (2) is made of a single material and each net mesh has a pattern such to give to the net structure auxetic properties.

Description

HAIRSTYLE ACCESSORY
TECHNICAL FIELD
The present invention relates to hairstyle accessories, in particular accessories for tying hair up, e.g. nets for buns.
BACKGROUND
To date, many hairstyle accessories are known, from simple hair clips to more articulated accessories used for complex hairstyles.
A particular type of hairstyle, very commonly used by dancers, is the bun. In this type of hairstyle, a bundle of hair is gathered to form a ball typically positioned at the nape. Due to the position and the mass of hair, to maintain the hairstyle, the use of a net, typically made of nylon or crocheted wool, is known. An example of an accessory able to form and hold in position a bun is described in patent US 3,693,637. A limit of current nets for buns is that they are delicate and do not maintain the shape effectively. For example, dancers perform jumps and dance steps that put strain on the hairstyle, therefore very often as well as the net it is necessary to use hairspray or other products, e.g. hairpins, which help to maintain the shape of the bun. Furthermore, these nets are subject to wear, in particular wear from water.
OBJECTS AND SUMMARY OF THE INVENTION
In light of the above, the problem underpinning the present invention is that of improving existing hairstyle accessories.
Within the scope of this problem, an object of the present invention is that of presenting a hairstyle accessory that allows a bun hairstyle to be maintained effectively.
These and other objects of the present invention will become clearer from the following description and appended claims, which form an integral part of the present description. In accordance with a first aspect thereof, the invention therefore relates to a hairstyle accessory, comprising a net structure provided with an opening for inserting a hair bundle, the net structure being composed of a plurality of net meshes and being suitable to hold hair therein. The net structure is made of a single material, and each net mesh has a pattern such to give to the net structure auxetic properties.
This solution offers the advantage of allowing the uniform expansion of the net in all directions, eliminating any strain in one direction on the material. This allows the shape of the bun to be maintained firmly and effectively. In one embodiment, the net structure has a spherical or ellipsoidal shape, meaning that it lies on a spherical or ellipsoidal surface. These shapes are well suited to a bun hairstyle; furthermore, the spherical, or substantially spherical shape, is suited to a particularly uniform expansion.
Advantageously, the pattern that is repeated is composed of three curved portions connected two by two at a vertex, each one of said three curved portions being composed of a pair of circular arcs having equal length and curvature, but having opposite concavities. This triangular based pattern, called hexachiral (described in the article "Auxetic mechanical metamaterials", H.M.A. Kolken and A.A. Zadpoor, The Royal Society of Chemistry 2017, p. 5111-5129) is well suited to a spherical shape in general as the triangular based optimisation is the one that is most adaptable to the curvature.
According to a preferred solution, in the area proximal to the opening of the net structure, the curved portions have a greater length and comprise arcs (201) having a curvature greater than curved portions arranged in a position distal from the opening. This allows greater stretching of the mesh, therefore a larger expansion and greater resistance in the area of greatest strain.
Advantageously, the net is made with elastomer polymers of different types, e.g. such structure can be made with silicone rubber with (i) hardness ranging from Shore A 8 to Shore A 100, and more preferably with hardness ranging from Shore A 10 to Shore A 40, and (ii) elasticity ranging from 100% to 1000% and more preferably ranging from 300% to 400% .
BRIEF DESCRIPTION OF THE DRAWINGS Further features and advantages of the present invention will be more evident from the following detailed description of some preferred embodiments thereof, made with reference to the appended drawings.
The different features in the individual configurations can be combined with each other as preferred according to the previous description, should it be necessary to avail of the advantages resulting specifically from a particular combination.
In such drawings,
- figure 1 illustrates a hairstyle accessory according to an embodiment of the present invention;
- figure 2 illustrates a sectional view of the accessory of figure 1;
- figure 3 illustrates the accessory of figure 1 and some details thereof.
- figure 4 illustrates a variant of the accessory of figure 1.
DETAILED DESCRIPTION OF THE INVENTION In the following description, for the illustration of the figures, identical numbers or reference symbols are used to indicate construction elements with the same function. Further, for illustration clarity, some references may not be repeated in all the figures.
While the invention is susceptible to various modifications and alternative constructions, some preferred embodiments are shown in the drawings and will be described in detail herein below. However, it is to be understood that there is no intention to limit the invention to the specific embodiment illustrated, rather, on the contrary, the invention intends to cover all the modifications, alternative constructions, and equivalents that fall within the scope of the invention as defined in the claims.
The use of "e.g.", "etc.", "or" indicates non-exclusive alternatives without limitations unless otherwise indicated. The use of "comprises" and "includes" means "comprises or includes but not limited to" unless otherwise indicated.
With reference to figure 1, a preferred embodiment of a hairstyle accessory 1 is illustrated. The hairstyle accessory 1 comprises a net structure 2 with a spherical shape having diameter De which, in the example described here, is 55 mm. Obviously, the measurements are not to be interpreted in the limiting sense and the object could be reproduced in different sizes according to the intended use, e.g. it may be possible to produce one accessory for children and one for adults, therefore of different sizes according to the mass of hair to be gathered.
The net structure 2 is made of a single material and has a plurality of meshes characterised by a triangular based pattern 20 that is repeated so as to guarantee auxetic properties, i.e. a negative Poisson coefficient, to the net structure.
With reference to the material, the accessory 1 is made of elastomer and in particular silicone rubbers with (i) hardness ranging from Shore A8 to Shore A100, and more preferably with hardness ranging from Shore A10 to Shore A40, and (ii) elasticity, measured as elongation ability, i.e. return without breaking, ranging from 100% to 1000% and more preferably ranging from 300% to 400% . These materials also offer the advantage of withstanding atmospheric conditions and other elements very well.
In one embodiment, the material used is waterproof, which also allows it to be used under the shower or for water sports, such as swimming. In order to guarantee the auxetic properties, the accessory is made of a single material, i.e. by injection moulding, or compression forming or processing through other known techniques, a single material that may comprise a single element / chemical product or mixture of elements / chemical products, e.g. a mixture of silicone rubbers. The triangular pattern 20, clearly visible in figure 3, is made through three curved portions 200 connected two by two at a vertex of the triangle. Each of the three curved portions 200 is composed of two arcs 201 having equal length but opposite concavity.
In the preferred example described herein, each arc 201 is an arc of a circumference having radius (Rl) 3.5 mm and the total length (LI) of the curved portion 200 is 14.9 mm.
In the example of figure 1 each curved portion 200 is composed of a strip of material having a square cross section, with dimensions 's' of 2 mm x 2 mm (Fig.2). It is however clear that curved portions can be provided with cross sections of different sizes and/ or shapes. For example, the section could be circular or curved.
In order to insert hair into the accessory 1, the latter has an inlet opening 3 whose edges are composed of a plurality of curved portions 201 each belonging to a different pattern of the net structure.
In the example described herein with reference to figures 1 to 3, the mesh has an identical pattern 20 that is repeated along the whole surface of the accessory 1.
In one embodiment, illustrated with reference to figure 4, the net structure has a plurality of meshes each still composed by a triangular based pattern composed of three curved portions composed of equal and opposite arcs. However, unlike the example of figures 1-3, in this embodiment the size of the meshes changes. In detail, the length of the curved portions, the curvature of the arcs and the thickness of the material that forms the curved portions may change along the surface of the net structure.
In particular, in the preferred embodiment, the design of the meshes in the region proximal to the opening 3, where the bun is subjected to greater strain, is designed to allow greater elongation of the triangles, therefore a larger expansion. In particular, in the region proximal to the opening 3, the pattern of the mesh is composed of curved portions with a greater length and arcs having a greater curvature with respect to corresponding patterns that are in a distal position with respect to the opening 3. For example, while in the distal position from the opening 3 the curved portions may have the dimensions and curvatures described above with reference to figure 3, in the proximal position to the opening the curved portions may have a length (L2) of 17.9 mm and be composed of arcs having a radius of curvature (R2) of 4.5 mm.
Therefore, in the embodiment of figure 4, the net structure is composed, in actual fact, of different meshes, that have the same triangular based pattern, but different lengths and curvatures of the curved portions. In light of the above, it is clear how the hairstyle accessory described above allows the pre-set objects to be reached, in particular the auxetic net structure allows a uniform expansion of the accessory 1 to be obtained in the radial direction and the hairstyle to be maintained. It is also clear that many variants can be made to the embodiments described above by way of example of the invention defined in the appended claims.
For example, instead of a triangular based pattern, the accessory 1 may comprise a net structure comprising a plurality of meshes each composed of a pattern of another shape that, however, allows the auxetic features of the net structure to be maintained. For example, there may be any pattern, e.g. of the type described in WO2016144406A1.
Further, the shape of the accessory does not necessarily have to be spherical, but may also be oval or similar according to the amount of hair to be contained, to allow an optimisation of the hold. However, the spherical or substantially spherical shape is preferred to guarantee the auxetic properties of the accessory.

Claims

1. Hairstyle accessory (1), comprising a net structure (2) provided with an opening (3) for inserting a hair bundle, the net structure (2) being composed of a plurality of net meshes and being suitable to hold hair therein characterized in that the net structure (2) is made of a single material, and each net mesh has a pattern such to give to the net structure auxetic properties.
2. Accessory (1) according to claim 1, wherein the net structure has a spherical or ellipsoidal shape. 3. Accessory (1) according to claim 1 or 2, wherein the pattern is composed of three curved portions (200) connected two by two at a vertex, each one of said three curved portions (200) being composed of a pair of circular arcs (201) having equal length and curvature, but having opposite concavities.
4. Accessory (1) according to claim 3, wherein in the region proximal to the opening (3), the curved portions (200) have a greater length and comprise arcs
(201) having a curvature greater than curved portions arranged in a position distal from the opening (3).
5. Accessory (1) according to claim 1 or 2 or 3 or 4, wherein each curved portion has a cross-section with a constant shape throughout the length thereof. 6. Accessory (1) according to claim 1 or 2 or 3 or 4 or 5, wherein each curved portion has a square or circular cross-section.
7. Accessory (1) according to claim 1 or 2 or 3 or 4 or 5 or 6, wherein said material is a polymer of elastomer family, particularly silicone rubber or a mixture of silicone rubbers. 8. Accessory according to claim 7, wherein the material has hardness ranging from Shore A 8 to Shore A 100.
9. Accessory according to claim 7, wherein the material has hardness ranging from Shore A 10 to Shore A 40.
10. Accessory according to claim 7 or 8 or 9, wherein the material has elasticity, measured as elongation ability, ranging from 100% to 1000% .
11. Accessory according to claim 7 or 8 or 9, wherein the material has elasticity, measured as elongation ability, ranging from 300% to 400% . 12. Accessory according to any of the preceding claims, wherein the material is waterproof.
EP18733687.0A 2017-06-14 2018-05-31 Hairstyle accessory Active EP3638071B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT102017000066188A IT201700066188A1 (en) 2017-06-14 2017-06-14 ACCESSORY FOR HAIRSTYLES
PCT/IB2018/053904 WO2018229585A1 (en) 2017-06-14 2018-05-31 Hairstyle accessory

Publications (2)

Publication Number Publication Date
EP3638071A1 true EP3638071A1 (en) 2020-04-22
EP3638071B1 EP3638071B1 (en) 2023-04-19

Family

ID=60138818

Family Applications (1)

Application Number Title Priority Date Filing Date
EP18733687.0A Active EP3638071B1 (en) 2017-06-14 2018-05-31 Hairstyle accessory

Country Status (4)

Country Link
EP (1) EP3638071B1 (en)
CN (1) CN110891453A (en)
IT (1) IT201700066188A1 (en)
WO (1) WO2018229585A1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SI26064A (en) 2020-09-18 2022-03-31 Univerza V Mariboru Axisymmetric chiral auxetic structure

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1467559A (en) * 1922-03-08 1923-09-11 Chester R Pieper Hair net
US8844065B2 (en) * 2009-12-23 2014-09-30 One Knot Hairnet Llc Single knot hairnet
US9629397B2 (en) * 2012-08-31 2017-04-25 Under Armour, Inc. Articles of apparel including auxetic materials
US9402439B2 (en) * 2013-09-18 2016-08-02 Nike, Inc. Auxetic structures and footwear with soles having auxetic structures
US9730490B2 (en) * 2015-08-04 2017-08-15 Nike, Inc. Upper for an article of footwear with auxetic configuration
CN106801296B (en) * 2017-03-06 2019-02-26 东华大学 A flexible auxetic fabric with adjustable scale and shape memory and its manufacturing method

Also Published As

Publication number Publication date
EP3638071B1 (en) 2023-04-19
WO2018229585A1 (en) 2018-12-20
CN110891453A (en) 2020-03-17
IT201700066188A1 (en) 2018-12-14

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