EP4253079A1 - Vorrichtung zum nachzeichnen - Google Patents

Vorrichtung zum nachzeichnen Download PDF

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Publication number
EP4253079A1
EP4253079A1 EP22166076.4A EP22166076A EP4253079A1 EP 4253079 A1 EP4253079 A1 EP 4253079A1 EP 22166076 A EP22166076 A EP 22166076A EP 4253079 A1 EP4253079 A1 EP 4253079A1
Authority
EP
European Patent Office
Prior art keywords
pins
magnetic particles
layer
pedestals
movable pins
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
EP22166076.4A
Other languages
English (en)
French (fr)
Inventor
Nikolaos CHRYSANTHAKOPOULOS
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.)
BIC Violex Single Member SA
Original Assignee
BIC Violex Single Member 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 BIC Violex Single Member SA filed Critical BIC Violex Single Member SA
Priority to EP22166076.4A priority Critical patent/EP4253079A1/de
Publication of EP4253079A1 publication Critical patent/EP4253079A1/de
Pending legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B43—WRITING OR DRAWING IMPLEMENTS; BUREAU ACCESSORIES
    • B43L—ARTICLES FOR WRITING OR DRAWING UPON; WRITING OR DRAWING AIDS; ACCESSORIES FOR WRITING OR DRAWING
    • B43L13/00—Drawing instruments, or writing or drawing appliances or accessories not otherwise provided for
    • B43L13/007—Contour tracing devices
    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63H—TOYS, e.g. TOPS, DOLLS, HOOPS OR BUILDING BLOCKS
    • A63H33/00—Other toys
    • A63H33/26—Magnetic or electric toys

Definitions

  • the present disclosure relates to the field of stenciling system. More specifically, the present disclosure relates to stenciling devices displaying structural colors based on magnetism.
  • Tracing is a leisure activity enjoyed by adults and especially children. Tracing may improve the development of motor skills, bilateral coordination and self control in children. Stencils may be used for tracing activities.
  • stencils are difficult to trace. Further, stencils may quickly become obsolete, as a user may become uninterested in stenciling the same shape multiple times.
  • Structural coloration occurs when microscopically structured surfaces interfere with visible light. Surfaces may appear in different colors depending on the spatial configuration of the surface without the need for pigments and/or dyes. While the colors of pigments and/or dyes are usually fixed, as their chemical nature would need to be changed to attain a different color, structural colors may change due to changes in physical parameters. For example, in thin films the color of the thin film may be changed by changing the thickness of the thin film or the layers therein.
  • the present disclosure aims to provide a novel system allowing tracing with adjustable stenciling shapes with vibrant colors and without edges.
  • the present disclosure relates to a system 100 comprising a pin screen 120 comprising a plurality of movable pins comprising a magnet. Further, the system 100 comprises a drawing substrate 110 configured to change color based on a magnetic force.
  • the drawing substrate 110 comprises a base layer 210 comprising a plurality of pedestals 220, an intermediate layer 230 comprising magnetic particles and a cover layer 250, wherein the intermediate layer 230 is disposed between the base layer 210 and the cover layer 250.
  • the magnetic particles may be configured to form a plurality of columns 240 upon exposure to a magnetic field, in particular wherein at least one, in particular each, of the plurality of columns 240 protrudes from a pedestal from the plurality of pedestals 220.
  • the intermediate layer 230 may be a fluid, in particular an aqueous solution comprising the magnetic particles.
  • the concentration of the magnetic particles in the intermediate layer 230 may be between about 0.05 vol.% to about 0.5 vol.%, more specifically between about 0.1 vol.% to about 0.15 vol.%, relative to the total volume of the intermediate layer 230.
  • the base layer 210 may also comprise magnetic particles, in particular between about 10 wt.-% to about 30 wt.% relative to the weight of the base layer 210.
  • the magnetic particles may be magnetic nanoparticles, in particular wherein the magnetic particles have a diameter between about 5 nm to about 50 nm.
  • the magnetic particles may be iron oxide particles.
  • the base layer 210 may comprise silicone and/or magnetic particles, more specifically polydimethylsiloxane comprising the magnetic particles.
  • the base layer 210 may comprise a polymer, in particular wherein the polymer comprised within the base layer 210 may comprise or consists of or substantially consists of PDMS.
  • the base layer 210's magnetic particles may be embedded in the base layer 210's polymer.
  • a distance (270) between two adjacent pedestals of the plurality of pedestals 220 may be between about 0.5 ⁇ m to about 50 ⁇ m, more specifically between about 1 ⁇ m to about 5 ⁇ m, and in particular between about 1.5 ⁇ m to about 3 ⁇ m.
  • the diameter of a pedestal of the plurality of pedestals 220 may be between about 0.5 ⁇ m to about 50 ⁇ m, more specifically between about 1 ⁇ m to about 5 ⁇ m, and in particular between about 1.5 ⁇ m to about 3 ⁇ m.
  • the height of a pedestal of the plurality of pedestals 220 may be between about 0.5 ⁇ m to about 50 ⁇ m, more specifically between about 1 ⁇ m to about 5 ⁇ m, and in particular between about 1.5 ⁇ m to about 3 ⁇ m.
  • the overall thickness of the base layer 210, intermediate layer 230 and cover layer 250 may be between about 10 ⁇ m to about 50 ⁇ m, more specifically between about 20 ⁇ m to about 40 ⁇ m.
  • the distance (260) between the base layer 210 and cover layer 250 may be between about 5 ⁇ m to about 50 ⁇ m, and in particular between about 15 ⁇ m to about 30 ⁇ m.
  • each of the columns of the plurality columns may be configured to tilt by between about 0° to about 45°, more specifically between about 5° to about 30° based on the direction of the applied magnetic field.
  • the drawing substrate 110 may comprise a trace layer.
  • the trace layer may be attached to the cover layer 250, or wherein a gap may be disposed between the trace layer and the cover layer 250, in particular a gap with a width between about 50 ⁇ m to about 3000 ⁇ m.
  • the trace layer may have a thickness between about 0.5 mm to about 5 mm.
  • the diameter of the plurality of movable pins may be between about 0.1 mm to about 5 mm.
  • the length of the plurality of movable pins may be between about 0.5 cm to about 10 cm.
  • the plurality of movable pins may comprise between about 50 to about 1000 movable pins.
  • the plurality of movable pins may be connected to a restoring force element configured to exert a restoring force on the pins when the pins may be moved out of a rest position, more specifically wherein the pins may be connected to a spring or an elastomer.
  • the plurality of pins may be of variable length, more specifically wherein the pins may comprise a plurality of segments, wherein the segments are configured to move relative to one another.
  • At least one pin of the plurality of movable pins may comprise at least one permanent magnet, more specifically at least one rare-earth magnet and at least one neodymium magnet.
  • At least one pin of the plurality of movable pins may comprise at least one electromagnet, in particular an electromagnet configured to activate when force may be applied to the movable pin.
  • At least one pin of the plurality of movable pins may comprise part of an electrical circuit, wherein the electrical circuit may be closed when force may be applied to the movable pin, in particular when a force exceeding a threshold pressure may be applied to the movable pin.
  • the magnet of the at least one pin of the plurality of pins may have a diameter between about 50 ⁇ m to about 10000 ⁇ m, more specifically between about 200 ⁇ m to about 5000 ⁇ m and in particular between about 500 ⁇ m to about 1000 ⁇ m.
  • the length of the magnet of the at least one pin of the plurality of pins may be between about 0.1 cm to about 3 cm.
  • the magnet may have a remanence between about 200 mT to about 2 T, more specifically between about 500 mT to about 1.8 T and in particular between about 800 T to about 1.5 T.
  • the pin screen 120 may be attached to the drawing substrate 110.
  • the system 100 may comprise a base plate, more specifically a base plate arranged between the plurality of movable pins and the drawing substrate 110, and in particular a stiff base plate arranged between the plurality of movable pins and the drawing substrate 110 configured to prevent direct contact between the movable pins and the drawing substrate 110.
  • the base plate may be attached to the drawing substrate 110 and/or wherein the drawing substrate 110 may be coated on the base plate.
  • the base plate may comprise glass, plastic or metal.
  • ferromagnetic particles in fluids may form columns when exposed to a magnetic field. Additionally, it has been found that the location of the formation of the columns can be influenced by disposing the fluid between two solid layers, wherein at least one of the layers comprises pedestals. In particular, the columns may preferentially form on top of the pedestals. A length of the columns may substantially extend along a local magnetic field line of the magnetic field. The relative angle of the formed columns may be altered by changing the angle of the local magnetic field line. It has been found that by tilting the angle of the plurality of columns 240 protruding from one or more pedestal the wavelength of light diffracted by the columns may be altered, hence the color of the diffracted light may be altered, see Figure 1 . Without wishing to be bound by theory, it is believed that the diffraction may follow Bragg's law and/or that the plurality of columns may form a diffraction grating.
  • the present disclosure relates to a system 100 comprising a pin screen 120 comprising a plurality of movable pins comprising a magnet. Further, the system 100 comprises a drawing substrate 110 configured to change color based on a magnetic force.
  • the drawing substrate 110 comprises a base layer 210 comprising a plurality of pedestals 220, an intermediate layer 230 comprising magnetic particles and a cover layer 250, wherein the intermediate layer 230 is disposed between the base layer 210 and the cover layer 250.
  • the system 100 may be used for tracing with a writing instrument 300.
  • a user may want to trace an object 200, such as a car toy, such as shown in Figure 3 .
  • the user may press the pin screen 120 on the car toy, whereby the movable pins move creating a negative of the disc.
  • the user may leave the pin screen 120 on the car toy.
  • the pins may be locked in place or require a threshold force to be overcome to move and the pin screen 120 may be moved to a desired location while still replicating the car toy.
  • Drawing substrate 110 may be placed on or be attached to the pin screen 120.
  • the color of the drawing substrate 110 may change as the magnets comprised in the plurality of pins exert magnetic force on the drawing substrate 110, in particular on the ferrofluid, which may lead to a change in color displayed by the drawing substrate 110.
  • the user may now trace the layer itself along the borders between two colors or place a transparent writing substrate on the drawing substrate 110 and trace on the transparent writing substrate.
  • each ring of the cylinder may be displayed in a different color, allowing tracing along the border of each cylinder.
  • the magnetic particles may be configured to form a plurality of columns 240 upon exposure to a magnetic field, in particular wherein at least one, in particular each, of the plurality of columns 240 protrudes from a pedestal from the plurality of pedestals 220.
  • the mechanism of the position control of the column formation may be that magnetic particles may aggregate to form aligned chains along the field direction, when disposed between two parallel planes and an out-of-plane magnetic field. The combination of multiple chains may result in the formation of each of the columns of the plurality of columns 240. The formation of the columns may require less energy when the distance between the two parallel planes is smaller.
  • the columns may preferentially form on the pedestals, as shown in Figure 4 , as the distance to the cover layer 250 is smaller there.
  • the cover layer 250 and the base layer 210 may be disposed substantially parallel or parallel.
  • the plurality of columns 240 may repel one another, preventing the formation of columns between the pedestals.
  • the intermediate layer 230 may be a fluid, in particular an aqueous solution comprising the magnetic particles.
  • the concentration of the magnetic particles in the intermediate layer 230 may be between about 0.05 vol.% to about 0.5 vol.%, more specifically between about 0.1 vol.% to about 0.15 vol.%, relative to the total volume of the intermediate layer 230.
  • the magnetic particles may be covered with a surfactant.
  • the surfactant may allow the magnetic particles to interact with the surrounding fluid, or solid when disposed within a solid, and may prevent the magnetic particles from aggregating, as the Van der Waals force of the surfactants is high enough to prevent aggregation of the magnetic particles due to the magnetic field.
  • the Van der Waals forces may prevent the formation of columns, as they may keep the magnetic particles in a regular distribution. If the concentration is very low, the concentration of the magnetic particles may not be high enough to form the plurality of columns 240.
  • the magnetic particles may have a diameter between about 5 nm to about 50 nm. Magnetic particles with a diameter between about 5 nm to about 50 nm may be processed into a colloidal fluid, wherein the magnetic particles do not clump, in particular wherein the magnetic particles do not clump when surfactants are bound to their surface.
  • the base layer 210 may also comprise magnetic particles, in particular between about 10 to about 30 wt.% relative to the weight of the base layer 210.
  • the magnetic particles may increase a local magnetic flux density on a top of the pedestal compared to a local magnetic flux density at a surface of the base layer 210 between two pedestals.
  • each column of the plurality of columns 240 may preferentially form on top of a pedestal compared to between pedestals.
  • the magnetic particles may be iron oxide particles.
  • Iron oxide particles may be ferro- and/or ferrimagnetic. Further, iron oxide particles may be highly magnetic materials compared to other magnetic materials.
  • the iron oxide particles may comprise magnetite and/or maghemite. Iron oxide particles may be non-toxic and cost-efficient.
  • the magnetic particles may comprise cobalt and nickel.
  • the magnetic particles may comprise surfactants, in particular surfactants attached to an outer surface of the particles.
  • the surfactant may allow the magnetic particles to interact with the solid, e.g. the polymer, or the fluid, in particular the aqueous solution, surrounding them. This may increase the effect of magnetism upon the solid and in particular the fluid. Additionally, the surfactants may prevent clumping/aggregation of the magnetic particles.
  • the base layer 210 may comprise silicone and/or magnetic particles, more specifically polydimethylsiloxane comprising magnetic particles.
  • the magnetic particles in the base layer 210 may comprise the same properties as the magnetic particles in the intermediate layer 230.
  • the magnetic particles in the base layer 210 may improve the formation of the plurality of columns 240.
  • the base layer 210 may comprise a polymer, in particular wherein the polymer comprised within the base layer 210 may comprise or consists of or substantially consists of PDMS.
  • the base layer 210's magnetic particles may be embedded in the base layer 210's polymer.
  • the magnetic particles may be present in the base layer 210 and hence within the polymer and in particular the PDMS.
  • the PDMS comprising the magnetic particles may be manufactured as described on page 2 of " Magnetically Actuated Dynamic Iridescence Inspired by the Neon Tetra” by Zhiren Luo, Benjamin Aaron Evans, and Chih-Hao Chang in ACS Nano on 2019 13 (4), 4657-4666 DOI: 10.1021/acsnano.9b00822 , which is incorporated herein by reference.
  • a distance 270 between two adjacent pedestals of the plurality of pedestals 220 may be between about 0.5 ⁇ m to about 50 ⁇ m, more specifically between about 1 ⁇ m to about 5 ⁇ m, and in particular between about 1.5 ⁇ m to about 3 ⁇ m.
  • the distance between each of the columns may be adjusted to affect light in the visible spectrum and to achieve a high color intensity.
  • a diameter of a pedestal of the plurality of pedestals 220 may be between about 0.5 ⁇ m to about 50 ⁇ m, more specifically between about 1 ⁇ m to about 5 ⁇ m, and in particular between about 1.5 ⁇ m to about 3 ⁇ m.
  • the height of a pedestal of the plurality of pedestals 220 may be between about 0.5 ⁇ m to about 50 ⁇ m, more specifically between about 1 ⁇ m to about 5 ⁇ m, and in particular between about 1.5 ⁇ m to about 3 ⁇ m.
  • the overall thickness of the base layer 210, intermediate layer 230 and cover layer 250 may be between about 10 ⁇ m to about 50 ⁇ m, more specifically between about 20 ⁇ m to about 40 ⁇ m.
  • the distance 260 between the base layer 210 and cover layer 250 may be between about 5 ⁇ m to about 50 ⁇ m, and in particular between about 15 ⁇ m to about 30 ⁇ m.
  • the aforementioned ranges of distances 260 between the base layer 210 and cover layer 250 may allow the formation of the columns upon exposure of the intermediate layer 230 to a magnetic field.
  • the base layer 210 may comprise a base layer inner surface, wherein the inner surface is oriented towards the cover layer 250.
  • the cover layer 250 may comprise a cover layer inner surface oriented towards the base layer 210.
  • the distance 260 between the base layer 210 and the cover layer 250 may the be the distance 260 between the base layer's 210 inner surface and the cover layer's 250 inner surface.
  • each of the columns of the plurality columns may be configured to tilt by between about 0° to about 45°, more specifically between about 5 to about 30° based on the direction of the applied magnetic field. Beyond a tilt of 30° the columns may be damaged.
  • the tilt of the columns may be measured by microscopy, in particular top-view optical microscopy.
  • the drawing substrate 110 may comprise a trace layer.
  • a user may place their writing substrate, for example a transparent piece of paper, on the trace layer and then perform their tracing.
  • the trace layer may provide a stiff support to the writing substrate. Further, the trace layer my protect the underlying drawing substrate 110 from damage, for example due to the user pressing their writing instrument 300 with excessive force on the writing substrate.
  • the trace layer may be attached to the cover layer 250, or wherein a gap may be disposed between the trace layer and the cover layer 250, in particular a gap with a width between about 50 ⁇ m to about 3000 ⁇ m.
  • the gap may prevent forces from being transferred from the trace layer to the cover layer 250, which may prevent damage to the cover layer 250.
  • the trace layer may have a thickness between about 0.5 mm to about 5 mm.
  • a diameter of the plurality of movable pins may be between about 0.10 mm to about 5 mm. Pins of smaller diameter may increase the resolution of the drawing substrate 110. Pins of higher diameters may be resistant to deformation.
  • a length of the plurality of movable pins may be between about 0.5 cm to about 10 cm. Longer pins may allow replicating objects of increased depth. Shorter pins may be more resistant to deformation.
  • the plurality of movable pins may comprise between about 50 to about 1000 movable pins. More pins may allow replicating larger object, given the same diameter of the pins.
  • the plurality of movable pins may be connected to a restoring force element configured to exert a restoring force on the pins when the pins may be moved out of a rest position, more specifically wherein the pins may be connected to a spring or an elastomer.
  • the restoring force element may move the plurality of movable pins back to their rest position after being pressed against the object 200, allowing reusing the pin screen 120 for another object, without requiring the user to manually move the plurality of movable pins back to the rest position.
  • the plurality of pins may be of variable length, more specifically wherein the pins may comprise a plurality of segments, wherein the segments are configured to move relative to one another.
  • the segments may be arranged as a telescopic tube. Upon being compressed against the object 200 the pin may shorten.
  • the segments may also comprise restoring force element to move back into their rest position after use.
  • the magnet may be comprised within the pins distal end relative to the drawing substrate 110, such that upon compression of the pin the magnet moves closer or proximal towards the drawing substrate 110.
  • At least one of the plurality of movable pins may comprise at least one permanent magnet, more specifically at least one rare-earth magnet and at least one neodymium magnet.
  • Permanent magnets may be easy to use.
  • permanent magnets may result in the system 100 being independent from a power source.
  • the system 100 being independent from a power source may result in improved portability and/or weight of the system 100.
  • power sources such as electrical power sources may be hazard, for example when the system 100 or parts thereof are damaged.
  • Rare-earth magnets and in particular neodymium magnets may be permanent magnets providing a strong magnetic field compared to other magnets of similar size. As a result, a rare-earth magnets may allow to more efficiently change the color of the drawing substrate 110.
  • At least one of the plurality of movable pins may comprise at least one electromagnet, in particular an electromagnet configured to activate when force is applied to the movable pin.
  • Electromagnets may allow controlling the magnets comprised in each pin individually, which may improve the contours displayed on the drawing substrate 110.
  • Electromagnets configured to activate when force is applied to the movable pin may for example only activate when pressed against the object 200, whereby force is applied. This may automatically activate the pins required to form the contour.
  • At least one pin of the plurality of movable pins may comprise part of an electrical circuit, wherein the electrical circuit may be closed when force may be applied to the movable pin, in particular when a force exceeding a threshold pressure may be applied to the movable pin.
  • the magnet may have a diameter between about 50 ⁇ m to about 10000 ⁇ m, more specifically between about 200 ⁇ m to about 5000 ⁇ m and in particular between about 500 ⁇ m to about 1000 ⁇ m.
  • a length of the magnet may be between about 0.1 cm to about 3 cm.
  • the magnet may have a remanence between about 200 mT to about 2 T, more specifically between about 500 mT to about 1.8 T and in particular between about 800 T to about 1.5 T. Stronger magnets may result in a more effective formation of the columns leading to a higher color intensity.
  • the pin screen 120 may be attached to the drawing substrate 110. As a result, the object 200 the pin screen 120 is or was pressed against is immediately displayed on the drawing substrate 110.
  • the system 100 may comprise a base plate, more specifically a base plate arranged between the plurality of movable pins and the drawing substrate 110, and in particular a stiff base plate arranged between the plurality of movable pins and the drawing substrate 110 configured to prevent direct contact between the movable pins and the drawing substrate 110.
  • the base plate may be attached to the drawing substrate 110 and/or wherein the drawing substrate 110 may be coated on the base plate.
  • the drawing substrate 110 may be damaged by contact with the movable pins, in particular if the movable pins are pressed against the drawing substrate 110 with force.
  • the base plate may prevent damage, while still allowing the magnetic field to largely pass.
  • the drawing substrate 110 may also be coated on the base plate reducing the number of components and assembly time.
  • the base plate may comprise glass, plastic or metal, in particular glass.
  • the base plate may be opaque, in particular black, to increase the contrast of the drawing substrate 110.
  • the system 100 may comprise one or more light sources configured to illuminate the drawing substrate 110. The one or more light sources may increase the visibility of the patterns formed by the pin screen 120.

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EP22166076.4A 2022-03-31 2022-03-31 Vorrichtung zum nachzeichnen Pending EP4253079A1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP22166076.4A EP4253079A1 (de) 2022-03-31 2022-03-31 Vorrichtung zum nachzeichnen

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP22166076.4A EP4253079A1 (de) 2022-03-31 2022-03-31 Vorrichtung zum nachzeichnen

Publications (1)

Publication Number Publication Date
EP4253079A1 true EP4253079A1 (de) 2023-10-04

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP22166076.4A Pending EP4253079A1 (de) 2022-03-31 2022-03-31 Vorrichtung zum nachzeichnen

Country Status (1)

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EP (1) EP4253079A1 (de)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20030218600A1 (en) * 1998-10-16 2003-11-27 Takara Corporation Limited Magentophotoresis type display device and process of production of same
WO2013091072A1 (en) * 2011-12-20 2013-06-27 Pascal Martineau Interactive pin array device

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20030218600A1 (en) * 1998-10-16 2003-11-27 Takara Corporation Limited Magentophotoresis type display device and process of production of same
WO2013091072A1 (en) * 2011-12-20 2013-06-27 Pascal Martineau Interactive pin array device

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
ZHIREN LUOBENJAMIN AARON EVANSCHIH-HAO CHANG: "Magnetically Actuated Dynamic Iridescence Inspired by the Neon Tetra", ACS NANO, vol. 13, no. 4, 2019, pages 4657 - 4666

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