156B Week 2

Overview of Status of Analysis, Design, Fabrication, Tests, etc.

This week, we were working on our design proposals and moving forward with the inspirations from the previous weeks to create a new design for a hair bundle lock. 

Accomplishments from Previous Week

• • More focus for what directions we can go in

  • Hair bundle lock

    • derived mostly from cord lock, with inspiration from parts from other products, such as wire management devices

    • needs to be one on each side and 2-3 in the front

  • Hair grippers

    • 2 possibilities

      • redesign hair gripper

      • create a third product to secure hair grippers down

Goals for Next Week (list names after each item). Use specific and measurable objectives.

• • Create digital model for our first draft

    • Daegeun Lee

  • Create physical model for our first draft

    • Chanyang yim

  • Test physical model on different materials and find breaking points

    • Kiel Baluca-Tran

  • Collect feedback and propose design changes

    • Everyone 

  • Create 2nd CAD draft

    • Eugene Olivar

Sponsor Comments from Last Meeting and Actions Taken to Address these Comments (indicate date of comments and if via email or in person)

In person meeting [01/10/20]

• • Hair Gripper

    • not as precise in isolating hair 

    • stabilize it to stay down & back 

    • its not pulling, its just gripping

      • grips and pops up

    • possibly make it tailorable to a multitude of patients and surgeons 

    • definitely good for short hair

    • currently, they put tape around the whole head

    • lab techs wouldn't autoclave it

      • beta-dine soak is fine

      • more likely to be disposed

    • can you have different grains for different hair types?

      • fine vs coarse hair

      • african-american/curly hair is tricky

• likes 2 products versus 1

  • • 1 is better than the other in some situations

• • possibly leave hair gripper as is and make a product to secure it down

  • tailor-ability and ability to secure makes it more usable in the emergency room

  • Cord lock

    • 1 for each side, 2 or 3 for the front

    • could be reused with the right materials

    • search light metals that can be used that are autoclavable

  • plastic bag sealer

    • more traumatic than the other two

    • if it works better is fine

    • possibly too complex for given time frame

Instructor Comments from Last Meeting and Actions Taken to Address these Comments  (indicate date of comments and if via email or in person)

In person meeting [01/09/20]

• • can deliver a function and not a product

  • ask what the sponsor doesn't like

  • sponsor will give a feeling or intuition, but won't have the knowledge to make an engineering decision

    • we provide the logical/rigorous stuff

  • include table with pros and cons

  • communication with sponsor is key for gaining direction

  • modifications depend on testing

    • if just purchasing is better, don't feel weird about it

      • NASA anecdote

    • ask sponsor of concerns with gripper and why not just purchase

Comments from Other Students in the Class (indicate date of comments and if via email or in person)

N/A

Risks and Areas of Concern

Design may completely fail, but full failure for our designs is not as critical as for other projects. The most important thing for us is to go through and improve our design rapidly.

Resources or Information Required but not Available

N/A

Schedule

Upcoming milestone: Completing the hair bundle lock aspect of the design

Progress on Report and Webpage

• 1. Background 

  2. Review of Existing Solutions 

  3. Statement of Requirements 

  4. Deliverables 

  5. Title page 

  6. Appendix with Individual Component Reports

As of Wednesday night, the formal sections are not complete, but we have compiled significant information for every section that will be split up after we complete the design proposals.