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Design Project I: Electric Toothbrush

Design Project I: Electric Toothbrush. Joe Merola Eric Kaminsky Sam Kim Jinzhao Wu. 10/14/2008. Engineering Design Process. Define Problem: To redesign an electric toothbrush to make it more appealing to children Conceptualization:

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Design Project I: Electric Toothbrush

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  1. Design Project I:Electric Toothbrush Joe Merola Eric Kaminsky Sam Kim Jinzhao Wu 10/14/2008

  2. Engineering Design Process • Define Problem: To redesign an electric toothbrush to make it more appealing to children • Conceptualization: • Internal Search: brainstormed concept ideas about toothbrush aesthetics and features • External Search: patent search, literature searches, product dissection, benchmarking • Preliminary Designs: drew basic sketches of several concepts and explored each design • Detailed Designs: selected final concept, and drew a detailed sketch of it, as well as a SolidWorks model of our final concept

  3. Project Management

  4. Hierarchal Customer Needs • . Easy Usage • 1.1: Big button • 1.2: One button (Power on/off) • F.1: One speed • C.1: Not too bulky • . Cost • 2.1: Not a rechargeable battery • 2.2: Assembled with easily accessible materials • C.2: Goal: under $15 • . Battery Life • 3.1: Get as much use of battery as possible • 3.2: Two AA batteries • . Two-minute Timer • F.2: Light-up timer • . Removable Heads • 5.1: Smaller heads for children with smaller mouths

  5. Revised Problem Statement Our initial problem was to design an electric toothbrush that’s safe and appealing for children. The main feature on our toothbrush will be a light-up timer. When a child turns the toothbrush on, the brush will begin to flash lights on and off. The lights will continue to flash for two minutes, and then they will stop. Since two minutes is the dentist recommended amount of time for brushing one’s teeth, the child will know that when the lights stop flashing, he has been brushing his teeth for long enough.

  6. Features • Flashing Lights: • Lights will flash when child turns toothbrush on • Timer: • Lights will flash for 2 minutes • Times how long child is brushing teeth • Transparent plastic outer surface: • Needs to be transparent to let flashing lights shine through • Replaceable batteries: • 2 AA batteries

  7. Criteria for Concept Selection AHP Chart

  8. Materials

  9. Toothbrush Top Toothbrush Body Toothbrush Bottom

  10. BACK LEFT FRONT TRIMETRIC FRONT RIGHT

  11. Engineering Analysis • Projected Cost: $4.463 per toothbrush • Reasonable to build • Sell for $12.99 • 291% profit per toothbrush

  12. Concluding Remarks • Toothbrush satisfies customer needs: • Easy to use • One on/off button • Is affordable • $12.99 • Long battery life • Takes two AA batteries to maximize life of toothbrush • Two minute timer • Lights flash for two minutes • Removable heads • Can fit into a child’s small mouth • Can be changed if one gets dirty or broken

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