Erasing Devices TRIZ Cases

See how merging a pencil sharpener, eraser, vacuum/blower, and storage into one handheld unit r

A tuned friction body generates enough heat to erase or change thermochromic handwriting while avoiding paper damage and heavy rubbing.

Multiple erasers mounted on a moving shaft speed whiteboard cleaning, reduce manual effort, and prevent lost hand-held erasers.

A deformable barb in the pen fitting hole cuts insertion force while locking the pen tip securely without scratches or tip detachment.

An oil-based pigment ink lets a multi-core pen combine thermochromic and standard writing without smearing during friction erasure.

Dual helical cams move both pen tip and eraser while keeping the mechanism compact and making refills and replacement easier.

A movable brake component adjusts reel torque for quiet, even coating transfer without the bumpy feel of fixed gearing.

This transfer tool uses slits and thickened gear roots to disperse bending stress, reducing support shaft breakage during assembly.

This case combines thermochromic and pigment-based oil inks to prevent non-thermochromic smearing during friction erasure.

A moist carrier erases thermochromic markings from synthetic paper, preserving tactile note-taking while reducing notebook waste.

Segmented containers keep the catalyst separate from silicone polymers until mixing, preventing premature curing and eliminating PVC hazards.

Integrating a marker clip into the handle of a hand-held dry-erase board eliminates the need to carry separate writing instruments.

Single-hand rotation between writing and erasing eliminates hand soiling and frees other hand for tasks.

A polyolefin and wood fiber composite material enables easy sharpening of pencil casings.

Magnetic alignment connects markers to reservoirs via pressure valves, automating ink transfer to eliminate manual spills and reduce plastic waste.

Specific ester compound controls color reaction between electron-donating and accepting components to maintain stable color states at normal temperatures.

A pen-like fluid dispensing device uses a tiltable valve element to open an outlet opening under radial pressure.

Resin friction bodies with controlled coefficients prevent paper damage while enabling comfortable, repeated rubbing for thermochromic effects.

Segmenting the friction portion into a rigid inner core and soft outer layer resolves deformation issues while enabling metallic luster pigment erasure.

A coating film transfer tool uses a button and elastic member to extend the pressing portion for film application.

Selective application of a hydrophilic refining prevention agent prevents over-refinement of printed parts, improving recycled paper whiteness.

Phenolic resin-based writing compositions replace mechanical erasure with chemical reactions, preventing substrate damage and smudging.

A display unit applies an electric field to displace particles, resolving incomplete erasure caused by parallel magnetic force lines.

A manual applicator handle pivots between two orientations via pressure-fit contours to accommodate different user grips.

Helical-cam propelling mechanism retracts eraser to front end, preventing user contamination without adding caps or increasing device size.

Cyanoacrylate adhesive bonds an eraser tip to a pencil ferrule, resolving the trade-off between simple assembly and reliable attachment.

A sliding attachment loop moves an eraser along a pencil shaft, eliminating the need to rotate the tool 180 degrees.

Segmented components isolate dirt accumulation from retention mechanisms, extending eraser lifespan.

A thermochromic pen friction unit with controlled Shore A hardness and composite structure to maintain erasure performance.

A click-type applicator uses a rotary cam to convert linear motion into rotation for piston advancement.

Low thermal effusivity friction bodies erase thermochromic ink while preventing paper damage from excessive heat.

A dispenser transfer head slides along a surface via a moving holding member, enabling continuous adhesive band transfer instead of spot placement.

A retractable writing instrument uses a gravity-actuated ball to block carriage movement, resolving complexity in switching between dual heads.

Segmented erasers combine resilient erasing zones with firm connector parts to maintain coupling characteristics and prevent wear during building play.

A helical-cam mechanism moves the eraser along the pen axis between retracted and protruding positions.

A film transfer tool uses a ratchet shaft with a speed ratio greater than one to adjust rotation speeds between bobbins.

Nested slides and guide sleeves enable reliable latching of writing instrument shafts while minimizing coupling volume.

A coating film transfer tool uses a protruding tip to pivot the head and distribute pressure evenly across the pressing edge.

A dual-reservoir writing instrument deposits fluids with distinct optical reflectivities to mark response areas on forms.

An adhesive intermediate roller stabilizes transfer tape tension across usage phases, preventing looseness and excessive force without complex mechanisms.

A plastic eraser composite body uses a specific combination of non-phthalate ester plasticizers to maintain required hardness and elasticity.

A mechanical pencil rotor uses cam faces and viscous grease to rotate the writing lead during cushion action.

Outer engagement step secures brush flange via point contact, preventing hair tips from catching inside the barrel during assembly.

Segmented screwdriver assemblies attach to pliers handles for torque application, resolving undersized tool usability through nesting and dynamics.

A resilient base member with a locking claw restrains supply reel rotation, preventing stringing and ensuring reliable tape cutting.

A gravity-actuated ball lock prevents axial translation in writing instruments by engaging a chamber based on device orientation.

An elastic ring member with integrated abutments accommodates varying stick sizes while maintaining structural strength and a clean external appearance.

Segmenting the applicator into distinct brush and needle tips resolves the contradiction between broad coverage area and precise application accuracy.

A film transfer tool uses a rolling gear and moving gears to prevent reverse rotation.

A coating film transfer tool cassette uses a push-button mechanism to extend and retract the head while maintaining smooth tape drawing.

A transferring device uses a guide surface and deflection roller to maintain object alignment during sliding movement.