In this project the design of a double base for two child restraint seats (CRS) has been developed. The objective of this project is to facilitate the transportation of two children in the rear seats of a car, maximizing the space available in the rear of the car and providing a comfortable movement to the user when placing the CRS baskets into the car. Scientific articles have been analysed providing a reference of the strength limitations and ergonomics aspects of the users as well as misuse of current CRS. Also, ergonomics and safety issues have been studied through these articles in order to fulfil with the current regulations established by the EU standards and the regulation 44 of Economic Commission for Europe. A market research and survey investigations have been done in order to study the features of existing CRS designs, opinion and needs of habitual users. The employed methodology based on a divergent and convergent design process has been carried out through different methods such as Brainstorming, 6-3-5 Method and Dark Horse Prototype in which many ideas, concepts and proposals have been developed and explained. The results of this project are shown and explained through a virtual 3D CAD model with their respective renders, explanations and technical drawings. The use and material selection of the final design are presented as well as the results of an ergonomic study performed by test with a simple physical prototype of the final design. The main outcomes of this project are included in conclusion, discussions and future work sections.

This study was made within the Child Safety group at Volvo Car Corporation.  The purpose of this bachelor thesis was to study the different aspects of rearward facing child restraint systems, which is the safest way for small children to travel, in order to suggest improvements in the development of child restraint systems. The studies included scientific articles regarding child safety and fatally injured children in car accidents, both in Sweden and internationally. The overall aim is to find factors that enables the increase in usage of rearward facing child restraint systems, including the increase of usage time to as long as possible.   Swedish accident data, obtained by the Swedish Traffic Data Acquisation, was studied. It was found that the fatally injured children during car accidents in Sweden between the years 2000-2016 commonly were involved in extraordinarily accident scenarios with an outcome independent of how they were restrained. The literature study and the survey that was made were both supporting the statement of inconvenience while using rearward facing child restraint systems. The inconvenience often corresponded to different types of misuse. The main issue with rearward facing according to the responding parents was lack of leg space, both for their child but also for the driver and the front seat passenger. These issues made some parents turning their children forward facing at early age, whereas they could still fit in the rearward facing child restraint system.   One key in order to increase the global use of rearward facing child restraint systems lies in changes of the materials and design. A more lightweight and compact design is suggested, providing a more spacious travel environment for the children and easier mounting for the parents. The need of education is apparent, preferable by means of social media due to the easiness of sending information globally with low cost.

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Every year 9000 children are estimated to die in traffic accidents in China. Fast motorization of the country in combination with low usage of child restraint system’s (CRS’s), are the two contributing factors to this alarming number. The vision of this thesis is to increase the usage of CRS’s in China, by understanding why the users are using the CRS and why the non-users are not using. The behavioural methodology Switch was used to investigate what positive behaviours could be copied and implemented in a larger scale to increase the usage. Interviews were performed with 30 users and 30 non-users in tier 1, tier 2, and tier 3 cities on the east coast of China. The main findings from the interviews showed that the reasons for not using was that the parents found the CRS complicated to install and to use, that it took too much space, that they did not know the benefits with a CRS and found it unnecessary and that they could not convince their children to sit in the CRS. Surprisingly most non-users already owned a CRS, but stopped using it. The users were using because they had experienced the CRS from abroad or got knowledge from other sources such as media or friends. Some parents were using because of a practicality issues such as the trouble to hold a heavy 3-year old child during a long trip. The behaviours chosen to represent the users for further work were learning from others, selection support, how to install, how to persist, and how to pay the knowledge of the CRS forward. The behaviour of the users was copied and implemented in a strategy consisting of the five parts above. The strategy is an interactive webpage with a close linkage to social networks to encourage sharing, and with a supporting poster- and bumper sticker campaign for spreading. The final product of the thesis work is a campaign including a fully working prototype of the webpage, which will be handed over to Volvo Cars for verification internally to make sure that the concept supports the different parts in a suitable and correct way before a public implementation. Material for poster and bumper stickers is also a part of the final delivery.

Great loads occur on human body in traffic accidents. Children body have less resistance to these loads. Child Restraint Systems (CRS) are the safety elements used in vehicles for children. In this study, the overturning and the dynamic test setups for CRS, have been designed and analysed according to United Nations Economic Commission for Europe Regulation No 44 (ECE R44). After manufacturing of the test setups, four different types of CRSs sold in Turkish market have been selected to evaluate their performance according to ECE R44. Each seat has been used once for the tests. The tests have been performed and evaluated according to the performances of CRSs for the dynamic test head displacement limit criterion, the acceleration limit criterion, the abdominal penetration criterion and the overturning head displacement limit criterion. 11 overturning tests and 8 dynamic tests at the sled test facility available in METU-BILTIR Center Vehicle Safety Unit have been conducted. In the tests, P-series 3 years, 6 years and 10 years old child test dummies have been used. During the dynamic tests, 3-axial accelerometer, high-g high speed camera and data acquisition system are also used to gather the test data. 8 more dynamic test with unlocked vehicle safety belt which is improper usage and commonly encountered in real life. As the result of the tests, none of the CRSs succeed in the tests for child seats which are supposed to be used by 3-6 years old children according to ECE R 44 Group II.

Orientador: Antonio Celso Fonseca de Arruda / Dissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Engenharia Mecânica / Made available in DSpace on 2018-08-28T00:07:21Z (GMT). No. of bitstreams: 1 RondonCachopo_CindyJanneth_M.pdf: 14082441 bytes, checksum: 57cfd2f3a77c65d3289114fe7207bfa4 (MD5) Previous issue date: 2015 / Resumo: Mediante uma abordagem de Design Centrado no Humano (HCD), foram desenvolvidos dois dispositivos para o transporte após da alta hospitalar de "recém-nascidos de baixo peso" (RNBP) com massas entre 1600 g e 2500 g. Um dispositivo foi projetado para uso em automóveis particulares e o outro para uso em veículos coletivos. Buscaram-se dispositivos capazes de minimizar os riscos no transporte de recém-nascidos de baixo peso e tornar mais confortável o transporte destas crianças. O processo de design abarcou 4 etapas: (1) especificar o contexto de uso, (2) especificar os requisitos, (3) produzir soluções de design e (4) avaliar o design. Inicialmente, foram necessários estudos para estabelecer o estado da arte dos produtos existentes no mercado bem como para caracterizar o público-alvo e conhecer o ambiente de uso. Estes estudos permitiram identificar as necessidades de conforto e de segurança dos usuários, as quais definiram os parâmetros dos projetos. As soluções desenvolvidas foram avaliadas iterativamente por meio de uma série de entrevistas com pessoas membros da Faculdade de Engenharia Mecânica, membros do pessoal de saúde da área de neonatologia e mães de Recém Nascidos de Baixo Peso, seguida de testes de usabilidade. A abordagem por meio do Design Centrado no Humano envolveu três grupos de usuários: o recém-nascido, os familiares do neonato e o pessoal de enfermaria. Estes três grupos participaram em todo o processo de design, o que possibilitou identificar e conhecer os aspectos importantes para a realização dos projetos e para atingir a aceitação dos usuários / Abstract: The low birth weight infants must be transported under special conditions after hospital discharge. These special conditions are associated with physiological immaturity and low weight state that encourage the need of differentiated retention devices of conventionally existing products. A human-centered design approach was used to develop two solutions for the low birth weight infant transportation, a solution for usage in particular vehicles and another for usage in collective vehicles. The design process embraced 4 phases: (1) specific the context of use (understanding the current conditions of "low birth weight infants" transport and the needs of the users), (2) specify the requirements (translate the needs of the users to requirements that the solutions must meet), (3) produce design solutions, (4) evaluate the designs. Previous studies were necessary to establish the context of use; these have enabled researchers to recognize the most important users¿ needs, which defined the parameters of the projects. The solutions developed were evaluated through a series of interviews, with groups of health staff from Neonatal Area and mothers of low birth weight infants, followed by usability tests. The human-centered design approach embraced three user groups: neonates, family members and health staff. These three groups were involved around the design process, this enabled to meet important aspects for the solutions realization and to achieve user acceptance / Mestrado / Materiais e Processos de Fabricação / Mestra em Engenharia Mecânica

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Road safety is integral to nearly every aspect of daily life all around the globe and it begins in early infancy. Children are exposed to the inherent risks associated with road traffic and it is the leading cause of death globally among children and young adults. Although effective prevention measures are available, it is all too common with either unrestrained or improperly restrained children on the global roads. Only children are omitted in the protection system of vehicles. Therefore, children require additional equipment to ride safely in cars. The purpose of this thesis was to address the dilemma of unrestrained and improperly restrained children. The objectives were to define the most important requirements for an integrated child restraint and based on these propose a design of such a system. The thesis reflected a concept development process and applied the three lenses of innovation, namely, desirability, feasibility, and viability. The prominent criterions in the product design specification includes arguments that so far have stagnated the value of an integrated child restraint. The arguments connect to cost, restricting comfort and space for other passengers, and restricting flexibility and weight of the total vehicle. The thesis proposed a design of an integrated child restraint for children between 4-12 years. Furthermore, it provides a glimpse of an integrated rearward facing child restraint for younger children to illustrate the importance of protecting all children in the standard vehicle design and in-vehicle restraint systems.