Identifying factors of comfort in using hand tools

Kuijt‐Evers, L.F.M.; Groenesteijn, Liesbeth; Looze, M.P. de; Vink, P.

doi:10.1016/j.apergo.2004.04.001

Cited by 121 publications

(51 citation statements)

References 37 publications

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“…A partir de las respuestas obtenidas en el primer caso se infieren los atributos que lo hacen más usable (Kuijt-Evers, et al, 2004), mientras que con base en las grabaciones se analizan las características de desempeño y los errores cometidos por el usuario durante la ejecución de actividades y tareas, teniendo en cuenta unas variables preestablecidas (Richardson, et al, 2017).…”

Section: Las Pruebas De Usabilidadunclassified

Diseño de herramientas precisas usadas con las manos: seguimiento ocular y otras técnicas de usabilidad

Lagos

Mojica

Arango-Vásquez

2017

Bitácora Urbano Territorial

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ArtículosDiseño de herramientas precisas usadas con las manos:seguimiento ocular y otras técnicas de usabilidad 1Designing precision hand tools used by hands:eye tracking and other techniques of usabilityDesign de ferramentas do precisão:controle ocular e outras técnicas da usabilidade 1 Investigación realizada por el Grupo de Investigación MIMA-PRO, adscrito al Laboratorio de Ergonomía y Factores Humanos de la Escuela de Diseño Industrial de la Universidad Nacional de Colombia, Sede Bogotá. Este proyecto fue financiado por la Facultad de Artes de la misma institución. ResumenEste artículo presenta las conclusiones de una investigación cuyo objetivo fue caracterizar atributos de diseño que permitan a creativos y otras partes interesadas desarrollar asertivamente un dispositivo de precisión usado con las manos. Para ello, se tuvieron en cuenta las técnicas de la usabilidad como los test y el seguimiento ocular, y se puo en práctica en un ejercicio con cuarenta usuarios que probaron cinco dispositivos representativos de las herramientas de precisión operadas con las manos: destornillador, esfero, llave, pincel y dosificador, por medio de la ejecución de tres procesos: reconocer el objeto, hacer una tarea real y otras controladas. Se concluyó que las personas muestran una curva de aprendizaje a medida que repiten la tarea solicitada, y que la configuración y la morfología de los sólidos para el agarre de los objetos precisos, influye en el desempeño de las mismas. Las herramientas con morfologías complejas presentaron mayor cantidad de visualizaciones, mientras que el diseño adecuado del sistema de control o mango de las herramientas de precisión requiere de superficies fáciles de identificar y que se parezcan a herramientas similares de la vida cotidiana.Palabras clave: usabilidad, ergonomía, diseño centrado en el usuario, herramientas manuales, seguimiento ocular. Abstract:This article presents the conclusions of an investigation whose objective was to characterize design attributes that allow creative and other interested parties to assertively develop a precision device used with the hands. In order to do this, usability techniques such as eye tests and traditional testing were taken into account, and were implemented in an exercise with forty users who tested five devices representative of precision handoperated tools: screwdriver, pen, key, brush and dispenser, by means of the execution of three processes: recognizing the object, doing a real task and controlled ones. It was concluded that people show a learning curve as they repeat the task requested, and that the configuration and morphology of the solids for the grip of the precise objects influences the performance of the same. Tools with complex morphologies showed more visualizations, while the proper design of the control system or handle of precision tools requires surfaces that are easy to identify and that resemble similar tools of everyday life.Keywords: usability, ergonomics, user center design, hand tools, eye-tracking. ResumoEste artigo apresent...

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Section: Las Pruebas De Usabilidadunclassified

Diseño de herramientas precisas usadas con las manos: seguimiento ocular y otras técnicas de usabilidad

Lagos

Mojica

Arango-Vásquez

2017

Bitácora Urbano Territorial

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“…For surface material, a softer material like rubber can increase the comfortability of the handle by reducing the peak pressure on the hands (Kuijt-Evers et al, 2004;Kuijt-Evers et al, 2007). By increasing the coefficient of friction, lower effort would be required to grip the handle, thus reducing the risks of overexertion and discomfort.…”

Section: Effect Of Ergonomics Features On Handle Comfortmentioning

confidence: 99%

“…Previous studies mentioned that the comfort of a hand tool's handle is related to its functionality and physical interaction (Kuijt-Evers et al, 2004;KuijtEvers et al, 2007). The descriptors of functionality are task performance, function, ease of use, good force transmission and low grip force requirements (Gregor and Bojan, 2013;Kuijt-Evers et al, 2004;KuijtEvers et al, 2007;Wyoming, 2011).…”

Section: Literature Reviewmentioning

confidence: 99%

“…The descriptors of functionality are task performance, function, ease of use, good force transmission and low grip force requirements (Gregor and Bojan, 2013;Kuijt-Evers et al, 2004;KuijtEvers et al, 2007;Wyoming, 2011). On the other hand, descriptors of physical interaction include the ability to fit in the hand, posture and pain or numbness in the hand and fingers (Kuijt-Evers et al, 2004;Kuijt-Evers et al, 2007). The above descriptors of comfort, functionality and physical interaction of the hand tool's handle can be improved in general by designing tools with proper diameters, shapes, materials and mechanisms.…”

Section: Literature Reviewmentioning

confidence: 99%

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Usability Validation of an Ergonomic Inward Directional Screwdriver for Enhanced Musculoskeletal Comfort

Ng¹,

Choong²,

Jee³

2016

American Journal of Applied Sciences

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Previous studies suggested that the use of inward torque direction in hand-related manual activities not only increases the total normal force and torque capacity but also reduces grip force. This means lesser effort is required to perform the task, which prevents overexertion and hand injuries. Manual screwdrivers are the most common hand tools used in the industry and daily life. However, due to the difficulty users face when unfastening screws, it can also be a hand tool that potentially leads to the development of cumulative trauma disorders. In this study, 50 subjects participated in a psychophysical testing of an ergonomic inward directional screwdriver and a normal manual screwdriver. The comparative study involved the perceptions of grip, comfort and ease-of-twist for both normal and ergonomic manual screwdrivers. The data was analysed using the analysis of variance via Minitab 16. The results showed that grip, comfort and ease-of-twist are significantly affected by torque direction and ergonomics features. Further observations on participant justifications also suggested that participants rated the inward screwdriver as a better tool to be used compared to the normal screwdriver.

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“…Third, the participants were asked to rate the list of descriptors on a 3 point scale (1= related to (dis)comfort, 2= not related to (dis)comfort, 3= do not know) [12]. Descriptor rated by more than 70% of the respondents related to comfort/discomfort was considered as meaningful descriptor [13] and selected for the main study.…”

Section: Pre-studymentioning

confidence: 99%

Identification and Analysis of Comfort Predictors in the Use of a Hand Tool

Sharma¹,

Kumar²,

Das³

2016

World Congress on Mechanical, Chemical, and Material Engineering

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-Comfort is a well-balanced state of physiological, psychological and physical factors of a human being and its environment. This paper is aimed at identifying the factors that determine comfort in using hammer according to the users. Before the primary data collection underlying descriptors were identified from literature. Further investigation was done to validate the identified descriptors with respect to comfort in using hammer. Principal component analysis with varimax rotation was used to classify the descriptors into factors. Eight factors were classified (functionality, body posture and muscles, tool characteristics, etc.). Handle and hand interaction was found to be the most important factor of expected comfort followed by aesthetics. For overall comfort, functionality was found to be the most important factor followed by body posture and muscles. Moreover, fit of tool to the hand and some more comfort predicting descriptors were identified whereas overall comfort predicting descriptors identified were ease of use, no inflamed skin, functional, easy to carry, and low hand grip force supply.

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Identifying factors of comfort in using hand tools

Cited by 121 publications

References 37 publications

Diseño de herramientas precisas usadas con las manos: seguimiento ocular y otras técnicas de usabilidad

Diseño de herramientas precisas usadas con las manos: seguimiento ocular y otras técnicas de usabilidad

Usability Validation of an Ergonomic Inward Directional Screwdriver for Enhanced Musculoskeletal Comfort

Identification and Analysis of Comfort Predictors in the Use of a Hand Tool

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