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Protective Earplug Designed for Water Activities

Gustavsson, Robert and Stode, Emanuel (2011) MMK820 20111
Product Development
Abstract
The aim for this project is to improve and replace ArjoHuntleigh´s existing scoop stretcher with a new concept. The field-of-use for the current stretcher is in hospital- and homecare, although other competitive scoop stretchers are used for ambulance emergency care. For this reason, the possibility to extend the target group is investigated.

Firstly, a comprehensive study, i.a. through study visits, was performed to establish customer needs and limitations for a new scoop stretcher. From these a number of specifications were established in order to evaluate and compare the performance of existing scoop stretchers on the market. These specifications were later used to evaluate the final concept.

In the next step a list of... (More)
The aim for this project is to improve and replace ArjoHuntleigh´s existing scoop stretcher with a new concept. The field-of-use for the current stretcher is in hospital- and homecare, although other competitive scoop stretchers are used for ambulance emergency care. For this reason, the possibility to extend the target group is investigated.

Firstly, a comprehensive study, i.a. through study visits, was performed to establish customer needs and limitations for a new scoop stretcher. From these a number of specifications were established in order to evaluate and compare the performance of existing scoop stretchers on the market. These specifications were later used to evaluate the final concept.

In the next step a list of subfunctions for the scoop stretcher was identified and for each subfunction a number of concepts were generated. Both the subfunctions and concepts main purpose is to satisfy the user needs. The concepts were screened to sort out less promising ideas, and the remaining was combined. These combinations were scored as guidance for a final choice of concepts. During the generation of concepts it was established that composite material was the most suitable candidate for the supporting areas of the stretcher. Therefore a more complex approach to the material aspect was used in the further development of the concepts.

Members of the target group were then revisited in order to get feedback on the chosen combination of concepts. A simple prototype in wood was built to test the ergonomics of the stretcher. How to adapt the stretcher for a human was analysed in order to obtain dimensions for the CAD. Further development of the components resulted in CAD-models that could be analysed in FEM to determine the performance of the stretcher. In this stage manufacturers were contacted in order to make sure that the design was realizable.

In the final step the FEM-analyses was performed and the result indicates that the established criteria was met. The new scoop stretcher has supporting surfaces in carbonfiber-epoxy-laminate with a new improved coupling mechanism and it is length-adjustable by two telescopic aluminium bars attached underneath the composite parts. The total weight is reduced from 9.4 kg to 7.8 kg and the safe-working-load is increased from 160 kg to 272 kg. It is also adapted for wider and taller patients than the current scoop stretcher. Other aspects are also improved such as ergonomics, hygiene and center of gravity adaption. (Less)
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author
Gustavsson, Robert and Stode, Emanuel
supervisor
organization
course
MMK820 20111
year
type
H2 - Master's Degree (Two Years)
subject
keywords
scoop stretcher, product development, FEM, composite, bedridden patients
language
English
id
3158730
date added to LUP
2013-01-07 08:23:08
date last changed
2013-01-07 08:23:08
@misc{3158730,
  abstract     = {The aim for this project is to improve and replace ArjoHuntleigh´s existing scoop stretcher with a new concept. The field-of-use for the current stretcher is in hospital- and homecare, although other competitive scoop stretchers are used for ambulance emergency care. For this reason, the possibility to extend the target group is investigated.

Firstly, a comprehensive study, i.a. through study visits, was performed to establish customer needs and limitations for a new scoop stretcher. From these a number of specifications were established in order to evaluate and compare the performance of existing scoop stretchers on the market. These specifications were later used to evaluate the final concept.

In the next step a list of subfunctions for the scoop stretcher was identified and for each subfunction a number of concepts were generated. Both the subfunctions and concepts main purpose is to satisfy the user needs. The concepts were screened to sort out less promising ideas, and the remaining was combined. These combinations were scored as guidance for a final choice of concepts. During the generation of concepts it was established that composite material was the most suitable candidate for the supporting areas of the stretcher. Therefore a more complex approach to the material aspect was used in the further development of the concepts.

Members of the target group were then revisited in order to get feedback on the chosen combination of concepts. A simple prototype in wood was built to test the ergonomics of the stretcher. How to adapt the stretcher for a human was analysed in order to obtain dimensions for the CAD. Further development of the components resulted in CAD-models that could be analysed in FEM to determine the performance of the stretcher. In this stage manufacturers were contacted in order to make sure that the design was realizable.

In the final step the FEM-analyses was performed and the result indicates that the established criteria was met. The new scoop stretcher has supporting surfaces in carbonfiber-epoxy-laminate with a new improved coupling mechanism and it is length-adjustable by two telescopic aluminium bars attached underneath the composite parts. The total weight is reduced from 9.4 kg to 7.8 kg and the safe-working-load is increased from 160 kg to 272 kg. It is also adapted for wider and taller patients than the current scoop stretcher. Other aspects are also improved such as ergonomics, hygiene and center of gravity adaption.},
  author       = {Gustavsson, Robert and Stode, Emanuel},
  keyword      = {scoop stretcher,product development,FEM,composite,bedridden patients},
  language     = {eng},
  note         = {Student Paper},
  title        = {Protective Earplug Designed for Water Activities},
  year         = {2011},
}