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hand-width, and a stiff wire that passes through the center of the cylinder, has two right angles, and is shaped into a hook at each end. This handle permits comfortable carrying, with otherwise bare hands, of a heavy package, suspended on a tight string that passes around the top and bottom of it: the string is strong enough to support it, but the pressure the string would exert on fingers that grasped it directly would often be unacceptable.
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to twist, the term "handle" unambiguously applies. Another clear case is a rarer device seen on mechanically complicated doors like those of airliners, where (instead of the whole hand moving down as it also rotates, on the door handles just described) the axis of rotation is between the thumb and
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Sufficient circumference to distribute the force comfortably and safely over the hand. An example where this requirement is almost the sole purpose for a handle's existence is the handle that consists of two pieces: a hollow wooden cylinder about the diameter of a finger and a bit longer than one
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Pulling the starting cord on a small internal-combustion engine may, besides moving the hand toward the shoulder, also exploit simultaneously pushing a wheeled vehicle away with the other hand, stepping away from the engine, and/or standing from a
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Design to thwart unwanted access, for example, by children or thieves. In these cases many of the other requirements may have reduced importance. For example, a child-proof doorknob can be difficult for even an adult to
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handles, where one or more hands grip the handle or handles, and exert force to shorten the distance between the hands and their corresponding shoulders. The three criteria stated above are universal for pull handles.
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Another category of hand-operated device requires grasping (but not pulling) and rotating the hand and either the lower arm or the whole arm, about their axis. When the grip required is a fist grip, as with a
203:, handles on latchless doors and the outside of car doors. The inside controls for opening car doors from inside are usually pull handles, although their function of permitting the door to be
236:, involve pulling on a handle against centrifugal force (without bringing it closer), in the course of accelerating the thrown object by forcing it into circular motion.
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Designs such as recessed car-door handles, reducing the chance of accidental operation, or simply the inconvenience of "snagging" the handle.
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396:"Optimal Handle Grip Span for Maximum Hand Grip Strength and Accurate Grip Control Strength Exertion according to Individual Hand Size"
363:"Effects of handle angle and work orientation on hammering: II. Muscle fatigue and subjective ratings of body discomfort"
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Sufficient strength to support the object, or to otherwise transmit the force involved in the task the handle serves.
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Wang, Mao-Jiun J. (Winter 2000). "The Effect of Handle Angle on MAWL, Wrist
Posture, RPE, and Heart Rate".
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to permit the hand or hands to surround it far enough to grip it as solidly as needed to exert that force.
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are an important part of their function, enabling the user to exploit the tools to maximum effect.
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Two kinds of pull handles may involve motion in addition to the hand-focused motions described:
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issues, even where these are dealt with intuitively or by following tradition. Handles for
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Sufficient length to permit the hand or hands gripping it to comfortably exert the force.
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against the hand, reducing the gripping force needed to achieve a reliable grip.
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the outermost fingers, so the thumb moves up if the outer fingers move down.
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Many pull handles are for lifting, mostly on objects to be carried.
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is a part of, or attachment to, an object that allows it to be
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81:. The design of each type of handle involves substantial
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open is accomplished by an internal unlatching linkage.
199:Horizontal pull handles are widespread, including
148:Other requirements may apply to specific handles:
210:Pull handles are also a frequent host of common
152:A sheath or coating on the handle that provides
125:The three nearly universal requirements of are:
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93:allow for convenient carrying of packages.
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403:Osteoporosis & Physical Activity
218:, fungal or other viral infections.
323:mallets involve a greater range of
188:One major category of handles are
27:Part of device designed to be held
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229:Some throwing motions, as in a
262:that has an arm rather than a
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480:Door Handles Can Spread Germs
271:Handles for wide-range motion
361:Schoenmarklin, R W (1989),
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451:10.1518/001872000779698079
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506:Human–machine interaction
342:Shopping trolley (caddy)
489:retrieved November 2016
97:General design criteria
32:Handle (disambiguation)
394:Liao, Kun-Hsi (2016),
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30:For other uses, see
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485:2018-01-20 at the
281:club-style weapons
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184:use pull handles.
121:Spade with handle
16:(Redirected from
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172:Pull handles
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61:Knife handle
260:door handle
75:manipulated
43:claw hammer
521:Ergonomics
500:Categories
348:References
337:Hand truck
317:golf clubs
105:Flat-nose
437:CiteSeerX
325:ergonomic
83:ergonomic
41:A modern
483:Archived
459:11324850
331:See also
327:issues.
305:hatchets
214:such as
154:friction
467:7243355
413:24 June
380:24 June
321:croquet
313:rackets
301:mallets
297:hammers
285:shovels
182:drawers
113:handles
71:grasped
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289:spades
226:squat.
216:e-coli
205:pushed
107:pliers
67:handle
53:handle
51:coated
47:rubber
516:Tools
463:S2CID
399:(PDF)
366:(PDF)
180:Many
109:with
87:tools
45:with
455:PMID
415:2023
382:2023
319:and
303:and
293:axes
287:and
264:knob
190:pull
167:use.
79:hand
73:and
447:doi
409:(2)
77:by
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Text is available under the Creative Commons Attribution-ShareAlike License. Additional terms may apply.
