table lamp

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INSTITUTE OF TECHNOLGY OF CAMBODIA

INDUSTRY AND MECHANICS ENGINEERING DEPARTMENT

INDUSRY ENGINEERING OPTION

Design of Table Lamp

Prof. Dr. Archie B. Maglaya

Students: SOVANN BARAINGTIM SOPHEARARITH MONOROMSOR PUTHEACHHIT CHANLY

Year 4/ Semester 22011-2012


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1.Design ProblemI. Examination of CostAbout the cost of Table Lamp, we have gotten a result from the market in Phnom

Penh (Cambodia) as follow:

For low class : From 5$ to 10$ For medium class : From 20$ to 34$ For high class : Over than 50$

The different cost in each class relates to the beauty of shape, shapes color, light color

and type of light bulb.

II. Method of illuminationThe Table Lamp can illuminate on area which is approximate 0.7m

2

on desk. The lightbulb can be moved vertically and horizontally and rotated freely.

III. Bulb support and baseThe base must keep the Table Lamp in stable position despite, we move the shade of

the light bulb to somewhere.

The support and the neck can move the light bulb to any point (vertical andhorizontal).

IV. Electrical fittingsThe light bulbs geometry is rectangular and it is hung under a shade. Electric wires

are put in the hole of support and go out through the hole behind and on the button of thebase. So the electric wire isnt seen from the light bulb till that hole.

V. ShadeThe light bulbs geometry is rectangular, so the shades geometry is also rectangular

on the light bulb.


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VI. ColorTo compete in market, we make the Table Lamps color as follow:

Available Pink Color: The shade, the base and the support is Pink. Available Blue Color: The shade, the base and the support is Blue. Available Claire Green Color: The shade, the base and the support is Green.

The color of illumination of light bulb is red.

VII. AssemblyThe table lamp has many parts such as:

- Base- Support- Neck- Connector- Shade- Light bulb- Interrupter- Electric wire.

They are fixed by screw.

2. Design specification

Performance

The Table Lamp can be operated every time and long hours lighting with freefrom worry.

EnvironmentThe Table Lamp is put in the room with normal temperature. So we dont

study much about choosing material.

Operating requirements

- Auto-voltage : 100V-220V- Frequency : 50Hz- Power : Max 18 w- Eye Protect- For domestic use

Life and ServiceWe design the Table Lamp being a permanent life, except the light bulb.

When the light bulb is dead, we can change it without remix the shade, the baseand the support. We just pull it out from the shade and replace a new one.


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We choose the light bulb whose life is about 50 000 hours.

MaintenanceThe durability of Table Lamp is permanent, so we dont need to maintain.

When the light bulb is dead, we just change it.

CostIn this project, we decide to design the Table Lamp for medium class. Its cost

must be about 30$ comparing the normally marketing cost

Packaging and ShippingThe elements of the Table Lamp such as: the shade, the support, the base, the

neck, the connecter, the electric wire, the interrupter, and the light bulb could beput in a box with the dimension:

o Length 320mmo Width 100mmo Height 200mm.

Manufacturing facilityWe use :

o Catia Program : Design the shapeo Injection Machine : Molding each element of the table lampo Polishing machine : To make the surface smooth

Size and WeightEach Element Length/Height Width thickness Weight

Support 155mm 60mm 40mm 0.1Kg

Neck 125mm 35mm 15mm 0.1Kg

Connector 70mm 35mm 15mm 0.1Kg

Shade and light

bulb

270mm 70mm 40mm 0.3Kg

Base,interrupter, andelectric wire

210mm 190mm 45mm 0.7Kg

Total 1.3Kg

AestheticRecently, the type of this shape in the market is popular for the medium

class.


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ShadeLight Bulb

Neck Connector

Support

BaseInterrupter

MaterialsType of material for making each element, we use plastic except the neck

of table lamp. The metal is used for making the neck which can be movevertically and horizontally. It is covered by the plastic.

For making the base, support, connecter and shade, we choose a type of plastic. It isAcrylonitrile butadiene styrene (ABS).

ABS Chemical Bounding ABS Grain

Advantage Limitations

ABS - Good rigidity- Dimensional stability- Hard and glossy finish- Improved impact and scratch resistance- Fairly good thermal, moisture and fat

resistance- Easy to mold and form- Easy to print, to metalize under vacuum, to

electroplate

- Opacity- Electrostatic- Poor chemical resistance- Poor weather resistance


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SafetyTo protect eye:

- We use the light bulb which illuminates the red color. The red illuminationscolor is safer than the white illuminations color.

- The shade can keep the illumination from reflecting directly to the eye.3. Presentation of alternative solutions

Concept 1 Advantage:- To keep in the stable position- Attractive appearance- It can be moved vertically and horizontally- Eye protection- To be easy to replace the light bulb- The interrupter can be seen clearly- The shade can be rotated.

Disadvantage- To be difficult to design in connecting the

electric wire and the light bulb atthe rotating point

Concept 2 Advantage:- To keep in the stable position- Attractive appearance- It can be moved vertically and horizontally- Eye protection- To be easy to replace the light bulb- The interrupter can be seen clearly- The shade can be rotated.

Disadvantage- When the interrupter is pushed,

the table lamp could fall down.- To be difficult to design in connecting the

electric wire and the light bulb atthe rotating point.


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Concept 3 Advantages- To keep in the stable position- Attractive appearance- It can be moved vertically and horizontally- Eye protection- To be easy to replace the light bulb- The interrupter can be seen clearly. Disadvantage:- To be difficult to design connecting the

electric wire and the light bulb atthe rotating point.

- The shade cant be rotated.

4. Evaluations of alternative solutionsDesign Feature Concept 1 Concept 2 Concept 3

- Stability- Beauty- Mobility of neck-

Safety- Light bulb replacing- Interrupter- Design- Rotating of shade

333

33323

233

33323

333

32321

Total 23 22 21

3: satisfactory; 2: nearly satisfactory; 1: unsatisfactory

Following the evaluation of each concept, concept 1 is the best of the above concepts.


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o Three colors of the first concept were designed


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o Rotation of Shade


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5. Method of Manufacture and AssemblyMethodology

For molding each element, we dont need to operate it, because we must spendmuch money on injection machine. So we command and buy each element of moldingfrom the company of plastic injection.

Assemblyo The base: To keep the table lamp in equilibrium point.

Start

Design the shape of Table Lamp

End

Commissioning

Molding each element

Connecting electric wire and assembly


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Below View

Front View Side View

Above View


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o The support: To connect the base to the neck.

Below View

Side ViewFront View Sid View

Above View


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o The neck: To allow the shade of the light bulb move vertically and horizontally.


Above and Below View


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o Rotational Connector: To fix the neck and the shade. To allow the shade rotatefreely.

Below View


Above View


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o Shade of the light bulb: To hang the light bulb.

Below View

Front ViewSide View

Above View


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o Assembly of all elements

Rock to increase the bases weight


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- First step : To fix the interrupter and the cover of the base. - Second step : To fix the base, the support, the neck and the shade in one shape. To

connect the electric wire from the light bulb socket to the interrupter.

- Third step : To close the hollow of the base, the plastic plate.

6. Manufacturing ScheduleGantt Chart

Activity First day Second day Third day

Morning Afternoon Morning Afternoon Morning Afternoon

Design

Materialordering

Preparingelectrical system

Assembly andCommissioning

7. Bill of Material- Plastic : 10$- Light bulb : 4$- contractor : 0.5$- Electric wire : 0.5$- Labor : 10$- Other : 1$- Total : 26$8. Summary

In design this table lamp, we choose plastic ABS (Acrylonitrile butadiene styrene)for making each elements. This plastic is ejected for making form following the shape wehave designed. We choose and buy the light bulb, electric wire, and the connecter fromthe market. Then, we assemble them to make the finished product. In the end, we test it toknow if it works following our definition.


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9. Conclusion and RecommendationThe table lamps shape is designed following the recently popular appearance. We

take 3 different shapes to compare, then, we choose the best one among them. In designthis project, we define accurately each elements dimension. The total expenditure of thisproduct is lower than the normal markets price of the table lamp (Medium Class). So, we

can produce this product to compete in market.

Despite this projects design is studied, it is still lack some point that we didntthoroughly study because of our knowledge limitation or misunderstanding. However, itcould be the better guide for design the table lamp for the next upgrading.


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10.AppendixThe Form of Market Survey Questionnaire

N Questions Answer

01 Which type of table lamp does the consumeruse the most? Low class Mediumclass High class

02 Do the consumers like the removable shade ofthe table lamp?

Yes No No idea

03 What is the illuminations color which theconsumers use the most?

Red White Other color

04 How much dose the table lamp cost for lowclass, medium class and high class?

05 What color of the table lamp which is popular? Pink Blue Other

table lamp

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