ergonomics and product design

8/8/2019 Ergonomics and Product Design

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Product appraisal of a key

S Shobana06AR1014



bow

blade

Teeth or biting

Bow hole

Grip groove



Four sided keys

Tubular key

Car keys

Zeiss key Key card



y Questions were targeted at mostly students.

y Questions were aimed at bringing out the problems that

are easily overlooked in day to day life.

y Experiments were given precedence over written survey.

y Some experiments that were conducted1. Size comfort test

2. light keyhole test

3. fore arm strength test



Given them a set of 5 keys whose length 2cm, 2.5cm,4cm, 5cm and 7cm

It was noted that 2cm keys were very cumbersome to use

Where as 7cm keys were notthe favorites to lug around.



The observer was given 3lighting conditions faced indaily life

1. Night no light2. Cell phone dim light3. Normal light

and 2 different kinds of locks1. Normal door lock2. Cycle lock



y It was seen that user found it easy to open both the

locks in normal lighting conditions.y Under dim light or no light the door lock was a

problem but the Cycle lock was comparatively easier.

Keys requiring alignment to fit lock hole proved tobe a challenge in this test.



This test was done to observehow much for arm accounts

for the torque applied.

Here the observer was givena bag with a laptop which

was hung on his forearm and was asked to open analignment lock.



y Authentication is not very perfect in key lock system.

y Orientation of door keys in the lock hole.

y Completely not useable in case of thumb disability orinability to rotate using forearm.

y

Easily misplaced.

y Needs good lighting.



y Magnetic orientationThe brim of the blade

will be coated with a thinlayer of iron and alignment

checker in the lock will be amagnet.

In case the orientation

of the key is wrong then themagnetic force will snap itback in place.

Magnetic ends



This problem can be bettertackled if an LED lightsource is put in the key

chains rather than trying toput light on the key.

Another option would beto use glow in the darkpaint on the key and nearthe lock hole so that are

visible in the night.



y Invention of key rings toprotect a single key fromgetting misplaced by putting them together.

y Problem of loosing theentire key bunch is oftenseen.

y This can be handled by tracking devices placed on

the key chain that canprobably be connected to your phone and GPRStracking could be used



y Thumb less keys

Implementation of atorque blade.

Essentially torque needs

to be applied is a circular force which can be manipulated with the length of the blade.

F

F

FF



y Instead of having a torqueshaft one can have anotherkey in its place.

y

Each key would act as theother keys torque blade.

ADVANTAGE:

Can be used by any one without the aid of thethumb.

DISADVANTAGE:

Will always be available inpairs so purchase of singlelock will be restricted.



y Problems with authentication with key:

In lock and key mechanism it is often noted that itis not a very safe method as the locking device is easily picked with any slender object.

Duplication of keys is a very easy task.

Lever systems are not completely hack proof.

Existence of master keys say it all that lock andkey can be easily overthrown.

PEOPLE STILL USE IT: It is traditional , cheap, readily available and also acts as a psychological barrier intoday's world



y This is a conventional key like object only with aglass face on top.

y

It prints the finger linesin the silicon surface and when the key is insertedin the lock it sends in the

finger printed data cross verifies it to access entry.

Reader case

Silicon reader

Connector blade

Key hole



SILICON READER:It will have infinite nano pressure sensors

that send signal back to generate a 0,1map.

It will map both thumb and index finger.

CONNECTOR BLADE:It stores and transmits the data fromthe silicon reader to the lock wherethe data will be analyzed to matchexisting profiles.



y This will essentially be animage processing IntegratedCircuit.

y

It will read the iris which isunique for every person andthen cross check the imagegathered with the database

and then grant accessaccordingly

y It will be wall mounted.



y Technology already available.

y Current use age in market products is the newPanasonic eye scanner.

It will be launched next year in the US.It costs about $2500.It does a lot of activities such as takesuser voice input and converts them ascommands to do various functions likeGive out notices to various locations,

Scheduling tasks etc.It also gives an accurate result of allailments predicted by eye conditionsand colour such as Wilsons disease etc.



y It only scans one eye by sending and receiving infraredsignal that are mild not to irritate your eye in the slightest way.

y The image captured is crosschecked with a database andcan only send or receive only lock open lock closed signal.

y This can be achieved using a similar IC developed for thePanasonic eye scanner.

y With a database size a maximum of 512mb (30 people data)

the entire authentication chip can fit inside a pen drivecase.

y The estimated cost of this product will be or the order $100.

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