(Voice recognition, gesture, EEG (electroencephalographic) and other modes for control have limitations including band-width, which will doubtless improve. Occasional users would also profit from some awareness of these matters.ĭespite the change in our society from an industrial to an information base, and from human to machine power, humans still communicate with machines by applying their hands or fingers to controls or keys of some kind.
A2 carry handle as for grip professional#
A check-list for handle design ought to be used by designers, buyers, and professional users of equipment of all kinds. Often only a little thought is needed to design or buy better tools and equipment. Handles are often too small, too stiff, sharp, awkwardly placed, and confusing to use. A technique for drawing hands is shown in Appendix 1. One of the early problems was illustrating hand grips and handles. For anyone with a strong interest in handle design, such thought experiments carry themselves out. Most handles should allow a grip to control and prevent unwanted turning, for example a saucepan, when the obvious design criterion (among the more than 60 to be listed) is flattening. Yet the great philosopher Wittgenstein designed a round door-knob in his plans for a luxurious family home, according to his biography by Ian Monk. It takes little imagination to know this is a problem compared with the possibly less aesthetic lever style of handle, which can also be opened by the forearm if both hands are holding something, and a person with a weaker grip because of arthritis. Imagine you are trying to turn a stiff slippery round door-knob. One is the “wet soapy slippery hand test” which should be possible for many others to picture in their mind. As a result I can conduct thought experiments about handles – often able to try them out in my mind without the need to try them physically. I have looked at forces involved at work, ranging from 0.05 N to 700 N.
A2 carry handle as for grip series#
I used, introspected, modeled, prototyped, photographed, drew, made, invented and contributed ideas on a scale from microsurgery (0.05 mm) to deseaming torches at a steel mill, where replacement springs for the handle were too stiff and injured a series of workers. Most of the article consists of more than 60 criteria against which the design of a handle or hand-held item can be compared, and it includes ways of checking some features of handle design.Ī personal note: I’ve been interested in handle design for over 50 years. This article starts by looking at common types of hand-grip, their features, how they are held and used, and the implications for design criteria. Users may be occasional, frequent, or professionally committed, and their items will vary in quality and price. The market for different handles is divided by class of users. They are more likely to sell better when competing internationally with established manufacturers. There are other reasons for looking at the ergonomics of handle design for products. There is an even greater need to apply principles of good design to handles and to understand better how they are to be used. Newer demanding activities such as micro, robotic and keyhole surgery have put more critical demands on hand-work than in the past. Like some managers and military leaders, and other astute people she was an excellent intuitive ergonomist. The author of children's books about Peter Rabbit, Beatrix Potter, insisted her publisher made her books small, to fit the small hands of children, at the same time as the typeface was large to make reading easy. All these need many of the same features, whether it is a book or a chair picked up by its back, a door or a door-handle pushed open by the body, or a hot metal shed that one leans against on a hot Australian summer day. Good handle design is important at work and in all kinds of daily activities for items that are efficient to use, safe, and attractive to buy.Īnything that can picked up by the human hand or which the body comes in contact with is in some sense a handle. There will always be a need for well-designed hand tools and hand operated controls despite newer technology.
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