Download - Support - Back Pillow
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1. Posture of looking at the blackboard
2. Posture of writing
1. Children who grow faster2. Old-type desks and chairs become
unsuitable
Develop an incorrect sitting habit
In classroom
1. Doing homework
2. Using computer
3. Playing on-line gamesSitting too long
•Affecting blood circulation
•A lack of exercises
Causing obesity
At home
Research
Improper sitting posture consequences
Pressure to back bone
• Damage of Cardiorespiratoryfunction
• Short sight
• Retention of urine
• Back pain
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Sitting Habits
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Shift of C.O.G. no support on hip
Shift of C.O.G. When tilting
Pressure Sensor
Soft mat
Stress point
Concepts
1
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Backrest distance changed
Hip contact undetected
B
AC
Back pillow
IR sensor
IR beam
Concepts
2
3 4
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Back pillow
Distance measuringIR sensor
Soft mat
Backrest distance changed
Hip contact undetected
Pressure sensor
ON/OFF
Backrest distance changed
Hip contact detected
5
Concepts
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Sketches
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Ercogonomic
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Design Features
Simple Easy operation Fit for the chair
Effective Calibration for three modes Retain users custom
Comfortable High ventilation Ergonomic design
User friendly Washable cover Clear user interface
End user Health
Maintain proper sitting posture Rest
Comfort No body attachment Ergonomic design
Customers Monitor Education assistance
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Design Features
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Design Features
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Design Features
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3 IR distance sensors
1 switch sensor
1 LED set (5 green LED)
1 button switch for LED 1 Micro-speaker 1 4-positions switch for On/Off + level
PCB
IR sensor
on/off
level switch
power
supply
LED on/off switch
LED
set
micro
speaker
pressure sensor
IR sensor
IR sensor
0
I
II
II
I
• Max. 10 pts (full marks)
• Min. 0 pts
• 5 pts at the beginning (first start/reset)
• +1 pt for sitting correctly over 15mins
• -1 pt for sitting incorrectly over 1min
Circus Design
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Chiffon
Flannelette
Memory foam
• Back pillow thickness
– Fit with different computer chair backseats
• Material
– Highly ventilated materials; fabrics/ weaves
Colours & Materials
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33.6
10
30
11
After making the prototype
Testing on children
Dimension modified
Front View
Isometric View
Side View
Top View
Foam Model
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Detected by both sensors
Detected by IR
sensors
Wrong Sitting Postures
Detected by pressure button
By prototype for testing, 3 ranges can be defined
Short range 18 cm
Middle range 20 cm
Long range 22 cm
10 yearold children
18 cm
6 year old children
22 cm
Foam Model