portable desk extender ge105:introduction to engineering design mohammed alamoudi abdulmohsin...
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PORTABLE DESK EXTENDER
GE105:Introduction to engineering design
Mohammed Alamoudi
Abdulmohsin Aldukhail
Abdulaziz Alsubaie
Abdullah Alotaibi
Mohammed Alomi
Mohammed Alswainee
PRESENT BY432100784
432104095
432100614
432104454
432100675
432107149
Supervisor: Prof. M.E.E.Abashar
Section:29779,Group1
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PROBLEM STATEMENT
There is a lot of people in Saudi Arabia are facing problems dealing with ordinary desks “old or small desk”. So it is required to design an extender.
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INTRODUCTION
The Portable Classroom Desk Extender is a horizontal, flat surface object that is use to give users more working space on a typical classroom desk, whether its to increase length on the right or left side.
It is lightweight, easy to carry and use and a functional product that is made of thermoplastic or wood which comes in various colors and also with a carrying bag for transporting
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NEED ANALYSIS
Does not occupy large space.
It should be lightweight.
Its cost should be reasonable.
High quality.
Easy to carry “portable”.
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NEED ANALYSIS
It must have a small space to store notes and papers.
Included with a one year warranty.
The extender design should be simple and easy to use.
It should be safe and reliable.
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OBJECTIVES
Primary objective: To design a portable desk extender.
Secondary objectives:
- Portable and easy to carry.
- Easy to use.
- Comfortable.
- Low cost.
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OBJECTIVES TREE
Primary
To design a portable desk extender
Comfortable Low costEasy to usePortable and easy to carry
Secondary
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CONSTRAINTS
The price should be less than 150 SR.
Weight does not exceed 19.6N (2 kg).
The width should be less than 35 cm.
The length should be less than 50 cm.
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CRITERIA
Portable.
Safe.
Low cost.
Reliable (1 year warranty).
Has storage space for notes and papers.
Easy to carry.
Adapted to wide variety of chairs.
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PROBLEM DEFINITION
Design a portable desk extender because people are facing problems dealing with ordinary desks. It doesn't need to occupy large space, safe and reliable, easy to carry and must be made with high quality materials. The price should be less than 150 SR, weight doesn't exceed 2Kg (19.6N) and the maximum of dimensions must be less than (35cm*50cm). Also it may have a one year warranty and can be adapted to wide variety of chairs.
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literature
(1)
(2)(3)
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Morphological analysis
Option 5 Option 4 Option 3 Option 2 Option 1 FEATURES
Aluminum Fiber Plastic Steel Wood Material
Several colors silver white black Wood color color
Laying down Sitting Body position
Mug circular handler
Pencil space Space to store notes and papers
extra
square rectangular circular shape
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Morphological analysis
Design (1) : Wood, Wood color, Laying down Pencil space, square.
Design (2) : Plastic , Several colors , Sitting, Space to store notes and papers, Mug circular handler, rectangular.
Design (3) : Steel, silver , Sitting , Mug circular handler, circular.
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Morphological analysis
score 2 3 4 5 3 rate Design (1)
330 20 30 40 150 90 total
score 4 5 4 4 4 rate Design (2)410 80 50 40 120 120 total
score 3 4 5 3 5 rate Design (3)390 60 40 50 90 150 total
The best design is design (2)
criteria
durability comfortable stability cost safety weights
20 10 10 30 30
* The rate is out of 5, 1 as worst and 5 as best.
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Human Factors
Anthropometric Factors (Dimension):• Width: 35 cm• Length: 50cm • Thickness: 2 cm
Ergonomic Factors:• It should be made of safety material doesn’t cause any health
problem. • We have make it easy to carry to make him comfortable while using
it.
Physiological Factors:• The Extender surface should have a soft touch.
Psychological Factors :• Color of the product may have a positive affect on the consumer.
Simulation (measures in cm)
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Mug circular handlerPlastic
Portable Hangers
Papers Storage
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SURVEY RESULTS (4)
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Conclusions
• We choose a design depending on the advantages for all people.
• The chosen design is easy to use, comfortable, safe, marketable, and cheap.
• This desk will serve a large portion of people who need writing and reading everywhere, some people spend three to four hours daily in Library, airport or university to reading and writing.
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References
(1) http://www.hope.edu/academic/engineering/engs451/2006/harrison.htm
(2) http://www.ergonomique.nl/en/ergocorner-en
(3) http://assistivetech.net/search/productDisplay.php?product_id=3341
(4) https://docs.google.com/forms/d/10g9Nuxc3AiQinmSk0EFLf5xyIGC0MipvlTMoBZsuGBM/viewform