156B Week 6

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

• • Decided not to add stand back in

  • Golf bag system seems stable now

    • Is in the final design iteration

Accomplishments from Previous Week

• • Purchased strap to hold bag together when user removes from box

    • Location of strap was put to middle of bag, for ease of access

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

• • Need to find a way to easily tuck strap away so user does not see it constantly

  • Draft a user manual

  • Ask peers to do user testing, work out the kinks

  • Make more aesthetically pleasing?

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

• • Meeting with Ronan in person 2/1/20

  • (next interview scheduled for next weekend, since Ronan is out of town this weekend) 

    • -Ronan likes the design so far, says it almost assembles itself

    • -Ronan noticed its very unstable compared to original golf bag, wobbles a lot

    • -Since there’s no stand bracket that’s why it wobbles

    • -we are looking for solutions to this issue

    • -if we extend the rigid piece to 1/3 of bag length, then the angle of wobbling would be less

    • -golf clubs inside would improve the experience, make it more stable

    •             -Ronan placed some golf clubs inside to test it out

    •             -can’t wobble as much because the length of the golf club stops the bag form moving     around as much

    • -if we add the stand bracket back in, then we would have to add another piece that has to be assembled

    •             -user has extra step added, another part to assemble

    •             -current stand isn’t fully rigid since it isn’t directly connected to the base of the bag

    •             -we know cost-wise which one would be better

    •             -don’t know which one the consumer will prefer

    • -problems with first bag design

    •             -circular stand bracket à rotation and unstable/can fall

    •             -this was solved by using square rod for stand system

    • -Ronan says we should focus on this system, less work for consumer is better

    • -tent pole stand bracket will increase price compared to current prototype price bc there’s another rod of metal

    • -Ronan says to stick with option one, don’t add tent pole stand bracket

    • -used a string to be a limit link to limit angle of legs

    • -marketing: need to show consumer that the wobbling isn’t a problem once the golf clubs are in

    • -current shipping box size is: 35 in x 6 in x 8 in

    •             -currently 14 in in length when folded

    •             -current volume would be about 14 in x 6 in x 8 in

    • -really nice golf bag goes for about $200, that’s much more than ours

    • -$1500 – 2000 for a new set of golf clubs, so price of this $30-40 bag isn’t much for user

    • -manufactured product would weigh less, would use thinner metal

    •             -would also be more aesthetically pleasing, we used tape etc

    •             -we use aluminum, but can use cheapest metal

    •             -can use better string for limit links

    • -unsure about wear test, rubber band inside legs is problem

    • -go on Alibaba? Contact rubber band factories and ask them what the lifespan is for bands

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

• • Meeting with Prof 1/30/20

    •  

    • -Main problem: we removed the stand bracket so now the bag itself is deformed

    •             -it looks unstable and is poor user experience

    •             -not sure if we should add stand bracket back in

    • -bag doesn’t look aesthetically pleasing

    • -Semi-rigid base connector

    • -not much of a weight difference

    • -current tent pole stand bracket is thicket than necessary, could find a thinner

    • -the square shape is easier to keep it from turning

    • -would need instructions to assemble this

    • -is it possible to use another geometric shape of stand bracket with a lock?

    •             -how do we deal with the sharp corner of the square shape?

    •             -add a fillet to decrease stress concentration?

    • -are we still considering the telescoping legs design?

    •             -would be difficult to manufacture, also too expensive

    • -we are thinking of adding another connector piece in middle of bracket

    • -changing location of middle stnd

    •  

    •  

    • -TA suggestion:

    •             -add a couple rings inside?

    •             -bc stand is removed, the bag is at an angle, bag would still be at an angle

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

Risks and Areas of Concern

• • Still looking for better elastics

    • We don't need this for the proof of concept, but will need it when designed for manufacturing (out of our scope)

  • Need to see how users interact with the non-intuitive assembly component

Resources or Information Required but not Available

• • CAD Model for handle

  • CAD model for all components

  • How do they do wear tests and strength tests? 

  • List of engineering standards related to this system

    • We have not received reply from sponsor or company engineers

Schedule

Budget (list amount spent and amount remaining)

• $140 spent at machine shop

• $42 telescoping replacement extension

• $34 small tent pole legs

• $40 large tent pole legs

  • $15 elastic string

  • $20 aluminum sheet

• $2709 remaining

Progress on Report and Webpage

• • Webpage has been updated with current prototype photos

    • Need to upload CAD files and images