PORTFOLIO2020

K A B I R K N U P P

www.kabirknupp.com

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KEYTURNERdevelopment of a motorized device that helps people with ar-

thritis open doors using their keys

ARTHRITIS

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university group project(conceptual)

Mar 2019 - June 2020

solo retake(prototyping)

June 2020 - Aug 2020

improved design(prototyping)

Aug 2020 - present

This is a product that I believe is able to improve the lives of those with limited hand dexterity. This is why I decided to take the project beyond the classroom and to make prototypes for a viable product that can be mass manufactured.

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foam modelling + user tes tingexploring hand comfor t+ keyhole access ib ility

KEY INSIGHTS

Knee Bend Low Strength Hand Tremors Wrist Pain Closed Fingers

USER RESEARCH

£5.99

EXISTING PRODUCTS

£4.79

the re is a gap in the mark e t fo r a moto r is ed k ey turne r

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less finger curl

- spherical shape; infinite axes of rotation

lightbulb + tape + key

technique adopted by those with arthritis

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2200mAh ICR 16340 3.7V Re-chargeable Li-ion Battery

20mm DC 3V-5V 38RPM Three Stage Planetary Gear-box 12 kgcm torque (at 3V).

reduce tooling

Solution: secure 3D printed part with shaft collar

Problem: motor torque destroys interference slot for shaft

12 teeth12 teeth

120 teeth120 teeth

54 teeth54 teeth

Stage 1Stage 11420RPM, 0.109N-M 260RPM, 0.596N-M 49RPM, 3.26N-M

Stage 2Stage 2 Stage 3 Stage 3

12 teeth12 teeth

120 teeth120 teeth

54 teeth54 teeth

12 teeth12 teeth

120 teeth120 teeth

54 teeth54 teeth

RS PRO DC Motor, 1.5 -3 V dc, 20 gcm torque, 7800 rpm, custom planetary gearbox design

proof of concept

testing in home door

launch at wall

add snaphooks and corresponding

grooves until survival

scale up to fit both the motor and battery

part incased but still able to rotate

trying a battery slot compactness

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casing print 1snap fit testing

casing print 2 casing print 3 casing print 4

I was able to design 3D printed casing that could snap fit shut. This meant that I could open and close the device quickly and make it appear naked from the outside.

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ILLUMINATION FEATURE

ILLUMINATION

TRANSLUCENCE

3.3V LED

Having an illumination feature that could light up the keyhole was heavily suggested from all users - trying to insert your keys in the dark can be very difficult.

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Shape of part turning provides mechani-cal feedback (particularly comforting for

elderly users)

Fits any key (gaps on each side allow any dimension of key to sit comfortably within the turner).

lubricated metal separator disk for smooth and quiet turning.

Inductive charging dock compatability (removing the need of hand dexterity to

needed to plug in a cable).

Illumination feature lights up the key-hole for better view in the dark (de-vice doubles up as flashlight).

All buttons are internal, giving the device external simplicity (a button on the outside can suggest a par-ticular orientation at which the device should be used;

which is problematic)

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POMEGRANITE

A DESIGN THAT IS FRIENDLIER FOR OLDER PEOPLE

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VASE

curvier

more opaque

slightly larger

CONTINUATIONI had feedback that the previous design looked a bit too alien for the target

market (which is mostly elders).

I redesigned the product with some friendly semiotics.

preliminary prints (testing interference dimensions)

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SKELETON/CAGE CASING

corner extrusions jam rotary motion of cage

experimentating ways to remove the need for large amounts extrusions in the casing

12mm dia x 2mm thick Neodymium Magnet - 1.6kg Pull (strong)

KEY INSERTION

- spherical clips for better grip if changing keys

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user sets up their key once with the grub screw

interference fit with tiny tolerance+ strong glue (fixing magnet to part)

new design is also com-patable with any key.

insertion technique reiterated:- intersecting - tesselating extrusions to transmit rotation- shaved off length

I didn't use the cage system for the first working prototype; I needed to be sure the components were secured really firmly.FIRST WORKING PROTOTYPE

soldering a simple direction switch circuit

Arduino Uno + MPU60 Gyroscope module

extrusions + paths for wires

The final product has no external switches. To activate a particular turning direction the user nudges the device clockwise or anticlockwise.

CIRCUIT DEVELOPMENT

push activation (concept prototypes from earlier)

motor terminal A

motor terminal B

battery +

battery -

p15short demo of prototype one: https://www.youtube.com/watch?v=zBsV0qHPkbI&feature=youtu.be&ab_channel=Kabir

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building a gizmo with a continuous user interaction

MUSICAL MACHINE

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HIGH TORQUE ROTARY MOTION

bring marbles upward - drop them onto drum

DRUMBEATCAM INDUCED TRANSPORTATION

wheel plucks Kalimba keys - music box style

USER INTERACTIONCLAPPING RATE DETERMINES TEMPO

CLAP

clap at different speeds to conduct the machine

CLAPCLAP

CLAPCLAP

MELODY

The project aimed to create a robot that constantly responds to a stimulus.

This robot mechanically plays music at a tempo set by a person's clapping rate.

OVERVIEW

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CARDBOARD PROTOTYPE

FINAL PHYSICAL RESULT

wood glueassembly

fourteen-edged wheel(14 note melody cycle)

retractable music pin(interference fit)

TESTING IN ACTION

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INSPIRATION(this is not originally

my own image)

ESCHER’S PENROSE STAIRS

3D PRINTING SOLUTIONS

printing without supportsinterference fit between two prints

lower % infillightweight print

feet - base supportsPRINCIPLES OF AN ENGINE

cam rings

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SMALL ABS GEARS + ELASTIC PULLEY

LASERCUT WHITE ACRYLIC GEAR TRAIN

TRANSMISSION

H-BRIDGE MOTORDRIVER

2x 12V MOTOR

4x 3V BATTERY PACK

2x 1.5V BATTERY PACK

ADAFRUIT PLAYGROUND EXPRESS (3V)

ELECTRONIC COMPONENTS

161 °

ADAFRUIT PLAYGROUND EXPRESS

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(this is not my own image)

ALGORITHM

1) AVERAging of REAl timE sound VAluEs bEing inputtEd

2) if sound REAding > thREshold VAluE (clAp), timE ElApsEd = t0

3) updAtE most REcEnt clAp to bEcomE t0 And pREVious to t1

4) cAlculAtE tRAnsition timE (subtRAct t0 fRom t1)

5) smoothing (AVERAging) of tRAnsition timEs bEtwEEn clAps

6) mAp tRAnsition timE AVERAgE to motoRspEEd

t0 - t1CLAP 1 CLAP 2 CLAP 3

TRANSITION TIME

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LASERCUTTING 4mm MEDIUM DEN-SITY FIBREBOARD (LIGHT)

DESIGN CONSISTENCYDESIGN

CONSISTENCY

SUN ENGRAVING

REFLECTIVE THEME

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12LEGGED

ROBOT

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Inspired by the Trinacria of Siscily

Universal joints allowing leg rotation during steering

linkage configuration allows turning circle of small radius

Torque transmitted by gears and chains

Rack and pinion steering actuated by mi-cro-servo motor.

runs faster than 0.5 m/s andhas body size less than 8cm.

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CAD ITERATIONS

MOTION TESTING (SOLIDWORKS)

GROUND

OBSTACLE

ROBOT

TAKING MOMENTS FROM :

DERIVED FROM:

HEIGHT OF OBSTACLEWEIGHT FORCE

LEG-WHEEL DIAMETERMASS OF ROBOT

ROBOT ABLE TO CLIMB OBSTACLES AT LEAST 55mm HIGH

ASSUMING THAT:

FINDING MAXIMA

CONSTANT

MAX TORQUE AT MOTOR CHOICE IS BASED OFF THIS CALCULATION

USING EXTREME CASES OF VALUES

PRELIMINARY VALUES

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TANDEM BICYCLE FRAMEUSING FINITE ELEMENT METHODS TO FUNCTIONALLY IMPROVE THE DESIGN OF A TANDEM BICYCLE FRAME

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-FIXTURES-LOADS

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-RAISE NATURAL FREQUENCY OF THE BICYCLE -INCREASE FATIGUE LIFETIME OF THE BICYCLE

SIMULATION PURPOSES:SIMULATION PURPOSES:

- larger welds at joints

- increased thickness pipes- frame width reduced

- smaller angle seatpost-new structural members

1.1.

3.3.

2.2.-FREQUENCY STUDY

-STATIC STUDY

THANK YOU FOR YOUR CONSIDERATIONyou can also see my website at www.kabirknupp.com