WO1999059446A1 - Mecanisme de support reglable - Google Patents

Mecanisme de support reglable Download PDF

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Publication number
WO1999059446A1
WO1999059446A1 PCT/AU1999/000384 AU9900384W WO9959446A1 WO 1999059446 A1 WO1999059446 A1 WO 1999059446A1 AU 9900384 W AU9900384 W AU 9900384W WO 9959446 A1 WO9959446 A1 WO 9959446A1
Authority
WO
WIPO (PCT)
Prior art keywords
axle
rotor
relative
bracket
platform
Prior art date
Application number
PCT/AU1999/000384
Other languages
English (en)
Inventor
Edwin Robin Russell
Original Assignee
Edwin Robin Russell
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Edwin Robin Russell filed Critical Edwin Robin Russell
Priority to CA002295025A priority Critical patent/CA2295025A1/fr
Priority to AU40234/99A priority patent/AU4023499A/en
Publication of WO1999059446A1 publication Critical patent/WO1999059446A1/fr
Priority to CA002292729A priority patent/CA2292729C/fr

Links

Classifications

    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47B—TABLES; DESKS; OFFICE FURNITURE; CABINETS; DRAWERS; GENERAL DETAILS OF FURNITURE
    • A47B21/00—Tables or desks for office equipment, e.g. typewriters, keyboards
    • A47B21/03—Tables or desks for office equipment, e.g. typewriters, keyboards with substantially horizontally extensible or adjustable parts other than drawers, e.g. leaves
    • A47B21/0314—Platforms for supporting office equipment

Definitions

  • This invention relates to mechanisms suitable for use in the angular adjustment of a working surface for an ergonomic purpose. Though not limited thereto, the invention is particularly suited to the fine angular adjustment of keyboard platforms and other working platforms, of arm, back and foot rests, and of a variety of viewing screens or display boards. It is also applicable to mechanisms for the translational adjustment of platforms and rests where one or more elements of the mechanism are angularly adjusted to effect the desired translational movement.
  • the mechanism of the invention basically comprises a pair of members coupled together for relative angular movement and a rotor mounted on an axle that is mounted on one member, the rotor having a face on one side that has an arcuate groove formed therein such that the radial distance between the groove and the axle varies in a gradual manner with variation in angle about the axle.
  • a pin or the like protuberance is mounted on the other member of the pair so as to enter and be slidingly engaged by the groove.
  • the arrangement is such that rotation of the rotor causes relative angular movement of the members but, desirably, such that pressure between the members preferably will not cause the rotor to turn.
  • each groove may subtend a short arc of less than 90°; it may subtend an 'arc' of more than 360° so that the rotor must be turned through more than one complete revolution to effect full angular adjustment of the members of the mechanism; or, it may subtend any intermediate arc length. Where the arc length tends toward or exceeds 360°, the groove can conveniently take form a spiral centred about - or at least encircling - the axle.
  • the members are elongate and pivotally joined together at one end.
  • the axle is free to move laterally in a slot in the member that carries the pin.
  • one of the members can be formed by a pivoting platform for supporting a keyboard, the platform being (for example) angularly adjustable through 15° or 20°, perhaps including both positive and negative angles relative to the horizontal.
  • the other member can be formed by part of the (preferably height-adjustable) frame upon which the keyboard platform is pivotally supported. If desired, most or all of the weight of the platform and keyboard can be taken by counterbalancing spring(s) or weight(s).
  • the members can form part of a parallel-arm mechanism (often known as a parallel four-bar linkage).
  • a parallel-arm mechanism often known as a parallel four-bar linkage.
  • the rotor is fitted between a pair of members of the linkage that are pivotally joined and that normally change in relative angle as the linkage is adjusted. The rotor then must be turned to effect adjustment of the parallel arm linkage, but weight or force placed on the linkage will not cause the rotor to turn and the linkage to change orientation.
  • Figure 1 is a diagrammatic side elevation of the mechanism that comprises the first example of the invention.
  • Figure 2 is a diagrammatic side elevation of the mechanism which comprises the second example of the invention.
  • Figure 3 is a diagrammatic side elevation of the mechanism which comprises the third example of the invention.
  • Figure 4a is a view of the face of the rotor employed in the example of Figure
  • Figure 4b is a sectional side elevation of that rotor taken on plane l-l of Figure 4a
  • Figure 5a is a view of the face of the rotor employed in the example of Figure
  • Figure 5b is a sectional side elevation of that rotor taken on plane II- II of Figure 5a. .
  • Figure 6a is a view of the face of a modified form of rotor employed in the example of Figure 1
  • Figure 6b is a sectional side elevation of the rotor of Figure 6a taken on plane Ill-Ill of Figure 6a.
  • Figure 7a is a side elevation of portion of a keyboard support mechanism comprising the fourth example of the invention, while Figure 7b is a sectional elevation of the portion of the mechanism shown in Figure 7a taken on plane
  • Figure 8 is a front elevation of the keyboard support mechanism of Figures 7a and 7b, the left hand portion of Figure 8 being a section taken on section line IV-IV of Figure 7a and the right hand portion of Figure 8 being an external (un-sectioned) front elevation of the mechanism.
  • Figure 9a is a side elevation of a keyboard support mechanism comprising the fifth example of the invention, with the keyboard support shown at the minimum angular adjustment.
  • Figure 9b is a side elevation of the keyboard support mechanism of Figure 9b with the keyboard support shown at the maximum angular adjustment.
  • Figure 10 is a side elevation of a computer monitor support comprising the sixth example of the invention.
  • Figure 11 is an end elevation of the monitor support of Figure 10 taken on plane VI-VI of Figure 10.
  • the mechanism 100 of the first example shown in Figure 1 simply comprises three moving parts: a first member comprising an angularly adjustable arm 102 that is pivoted by hinge-pin 103at one end to a fixed strut 104, and a rotor 106 which is secured by a stub axle 108 to strut 104 but is free to turn about axle 108. If desired, rotor 106 may be fixed to axle 108 and the axle may be rotatably mounted in a bearing on strut 104. Rotor 106 has a flat front face 110 ( Figures 4a and 4b) in which a spiral groove 112 is formed, face 110 being arranged to lie close to the rear face of arm 102.
  • Groove 112 in this case subtends an angle of substantially 360°, allowing rotor 106 to be rotated practically a full turn.
  • groove 112 does not open out into the front or outer face 114 of rotor 106 so that the rotor is not unduly weakened and so that the groove is not visible to the user.
  • a pin 114 is fixed to the rear face of arm 102 so as to enter and slidingly engage groove 112.
  • pin 114 on arm 102 is constrained to move radially to or from axle 108 and the angle between arm 102 and strut 104 is decreased or increased accordingly.
  • pin 114 With rotor 106 turned fully anticlockwise, pin 114 is at its closest to axle 108; with rotor 106 turned fully clockwise, it is furthermost from axle 108 and is shown in broken lines at 114a in Figure 1.
  • the corresponding location of arm 102 when with the pin at 114a is shown in broken lines at 102a.
  • the second exemplary mechanism 200 illustrated in Figure 2 substitutes a triangular bracket 202 for the strut of the first example and employs a pair of angularly adjustable arms 204 and 206 instead of one.
  • Arm 204 is pivoted to one corner of the base of bracket 202 by a hinge-pin 207 so as to be located on the rear face of the bracket 202.
  • Arm 206 is similarly attached to bracket 202 by a hinge-pin 208.
  • An axle 210 is affixed to the apex 212 of bracket 202 and rotatably carries a rotor 214, the front face 216 ( Figures 5a and 5b) of rotor 21 being planar and arranged behind and in close proximity to the rear faces of brackets 204 and 206.
  • a first arcuate groove 218 is formed in the face 216 of rotor 214 and takes a pin 220 affixed to arm 204, while a second groove 222 takes a pin 224 affixed to arm 206. It will be seen that each groove is semi-circular in shape but is offset from the stub axle 210. Thus, rotor 214 can be turned only by about 180° before the pins strike the ends of their grooves. When rotor 214 is fully clockwise, pins 220 and 224 and arms 204 and 206 are located as shown in full lines; when rotor is fully anticlockwise, they are shown in broken lines at 220a, 224a, 204a and 206a respectively.
  • the third exemplary mechanism 300 illustrated in Figure 3 provides a finer range of angular adjustment than the first two examples.
  • an upwardly extending arm 302 is attached at its lower end 303 by a hinge-pin 304 to the end of a horizontal strut 306 in a similar manner to that of the first example, arm 302 being on the front side of strut 306.
  • the pin 308 which runs in groove 310 of rotor 312 is attached to the strut 306 rather than to the arm 302 as in the first example.
  • a second downwardly extending arm 314 is pivotally attached to the other end of arm 302 by a hinge-pin 316, second arm 314 being on the front side of first arm 302.
  • the lower end 318 of arm 314 carries a rearwardly extending stub axle 320 on which rotor 312 is rotatably mounted, rotor 312 being located behind arm 302 and axle 320 extending through a slot 322 formed in that arm.
  • groove 310 is of semi-circular form and is offset from axle 320, allowing rotor 312 to turn through approximately 180°.
  • the pin 308 that rides in groove 310 is affixed to strut 306, rotation of rotor 312 one way and the other will slide axle 320 to the left and right along slot 322.
  • This causes a rather small change (compared to the first and second examples) in the angular orientation of the second arm 314, the opposite extreme position of arm 314 being shown in broken lines at 314a.
  • An even smaller angular change occurs in first arm 302. Either of these angular changes can be used to advantage in devices of which the mechanism of this example forms a part.
  • the fourth example - illustrated in Figures 7a, 7b and 8 - relates to the angular adjustment of a keyboard support platform 400 that is mounted for vertical adjustment on a parallel-arm linkage 402 similar to that described in my above mentioned US patent.
  • This linkage may be considered to be a frame that supports the platform 400 but, many other supporting frames are possible. Only the upper portion of linkage 402 is illustrated and comprises an upper inverted channel-form link 404, a pair of lower link arms 406 and a vertical U-shape bracket 408 within which links 404 and 406 are fitted.
  • Upper link 404 is pivotally secured to the upper part of bracket 408 by a transversely extending rod 410, while lower arms 406 are pivotally secured to bracket 408 by a transverse axle 412 that carries on each out end a rotor 414.
  • the rotors are preferably rotationally secured to axle 412 as by roll-pin 415, but this is not essential as they could be free to rotate independently on axle 412. It will be appreciated that, as with common parallel arm linkages, bracket 408 can be raised or lowered by swinging links 404 and 406 while remaining vertical. In this way platform 400 will retain its generally horizontal disposition despite being raised and lowered by the parallel arm linkage 402.
  • Support platform 400 comprises a generally horizontal plate 416 (proportioned to accommodate a normal keyboard) extending from a rear facing and rear-sloping U-shape bracket portion 418 that is pivotally attached to bracket 408 by rod 410.
  • a transversely extending elongate pin 420, located in front of bracket 408, passes through the lower rear corner of bracket portion 418 and extends outwardly at each end into a spiral groove 422 formed in the inner face of respective rotor 414. It will be appreciated that the spiral grooves 422 need to be of opposite 'hands' in the two rotors; that is, one should be a mirror image of the other.
  • platform 400 rests on pin 420 which in turn rests on rotors 414.
  • the angle at which platform plate 416 rests is determined by the rotational position of rotors 414 because, as will be clear from the previous examples, that determines the radial position of pin 420 with respect to axle 412.
  • the angle of plate portion 416 of platform 400 with respect to the horizontal can be adjusted from horizontal (0°) through to about -15° (the negative angle indicating a downward and rearward slope).
  • Figures 9a and 9b is a variant of that of the previous example and the same reference numerals are used to designate parts that are essentially the same. Where there is significant variation in a part from the previous example, the reference numeral for that part will be give the suffix 'a'.
  • U-shape bracket 408a extend upwardly above the level of upper link 404 so the bracket portion 418 of platform 400 can be pivotally mounted higher (with respect to link 404) on a raised transverse rod 410a that passes through the upper extremities of the sides of U- shape bracket 408a.
  • a second significant variation is that the axle 412 of the last example is placed where the pin of the previous example was located (ie, on the lower rear corner of the bracket portion 418 of platform 400). The axle in this example is indicated at 412a and carries rotors 414 on its outer ends.
  • pin 420a of this example is used as a rod to secure link 404 to bracket 408a, the ends of pin 420a extending outwards sufficiently to enter the grooves 422 of respective rotors 414.
  • rod 410a secures the lower links 406 to bracket 408 (in place of axle 412 of the preceding example).
  • the final example relates to a computer monitor support 500 based upon a parallel arm mechanism.
  • the support comprises a lower horizontal bracket 502 and an upper horizontal bracket 504 pivotally linked by two pairs of parallel links, the upper arm of one pair being indicated at 506 and the lower arm being indicated at 508.
  • the lower ends of upper arms 506 are pivotally attached to bracket 502 by hinge-pins 510 while lower ends of lower arms 508 are pivotally attached to bracket 502 by a transverse rod 512.
  • the upper ends of upper arms 506 are pivotally attached to upper bracket 504 by a transverse rod 514 while upper ends of lower arms 508 are pivotally attached to top bracket 504 by hinge pins 516.
  • the upper end 508a of lower arm 508 is extended beyond its hinge-pin 516 and, together with the opposite and corresponding arm, carries a transversely extending pin 518 that extends outwardly at each end to engage the groove 520 of a respective rotor 522, each rotor being mounted on the outer end of a transverse axle 524 carried by the upper bracket 504.
  • the groove 520 formed in the inner face of each rotor 522 is a two-turn spiral that is generally concentric with axle 524. It will be seen that, as the rotors are turned, the angle made by arms 508 to the upper bracket 504 is forced to change by the action of pin 518 in grooves 520.
  • a tension spring 526 is connected between transverse rods 512 and 514 to bias the upper bracket upward and to bear some of the load thereon. More than one spring may be needed if the load justifies it.
  • spring or gas-strut biasing may be used to take most if not all of the weight of the monitor in the case of the last example, thereby removing most if not 5 all of the load borne by the rotor grooves and pins.
  • a simple spring arrangement can be used to take the load of the keyboard platform in the examples of Figures 7a to 9 to again relieve the rotor grooves.
  • the mechanism of the invention can be applied to a o variety of ergonomic accessories and devices apart from keyboard and monitor supports; for example, footrests, backrests and a variety of working surfaces.

Landscapes

  • Pivots And Pivotal Connections (AREA)

Abstract

L'invention porte sur un mécanisme (100) permettant d'effectuer le réglage angulaire relatif d'une paire d'éléments (102, 104) couplés. Un rotor (106) est monté sur un axe (108) monté lui-même sur un élément (104), le rotor ayant une face plane sur un côté constitué d'une rainure (112) courbe de sorte que la distance radiale entre la rainure et les axes varie progressivement simultanément avec la variation de l'angle autour de l'axe. Une broche (114) ou autre élément saillant est montée sur l'autre élément (102) de la paire de façon à pénétrer et s'engager en coulissant par l'intermédiaire de la rainure (112). Cet agencement est tel que la rotation du rotor provoque le déplacement angulaire relatif des éléments, mais la pression entre les éléments n'entraînera pas la rotation du rotor. L'invention porte également sur l'application de ce mécanisme au réglage de plates-formes de claviers et de supports d'écrans.
PCT/AU1999/000384 1998-05-19 1999-05-19 Mecanisme de support reglable WO1999059446A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
CA002295025A CA2295025A1 (fr) 1998-05-19 1999-05-19 Mecanisme de support reglable
AU40234/99A AU4023499A (en) 1998-05-19 1999-05-19 Adjustable support mechanism
CA002292729A CA2292729C (fr) 1999-05-19 1999-12-20 Mecanisme de soutien reglable

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AUPP3558 1998-05-19
AUPP3558A AUPP355898A0 (en) 1998-05-19 1998-05-19 Adjustable support mechanism - II

Publications (1)

Publication Number Publication Date
WO1999059446A1 true WO1999059446A1 (fr) 1999-11-25

Family

ID=3807811

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/AU1999/000384 WO1999059446A1 (fr) 1998-05-19 1999-05-19 Mecanisme de support reglable

Country Status (3)

Country Link
AU (1) AUPP355898A0 (fr)
CA (1) CA2295025A1 (fr)
WO (1) WO1999059446A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011100807A1 (fr) * 2010-02-22 2011-08-25 Edwin Russell Mécanisme de support

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2196606A (en) * 1986-09-15 1988-05-05 Lauri Koistinen Device for raising, lowering and/or inclining objects such as table tops, drawers and the like
GB2214069A (en) * 1988-01-20 1989-08-31 Krause Robert Gmbh Co Kg An adjustment device for adjusting the tilt and/or height of a bench or table top of a piece of furniture
WO1991008694A1 (fr) * 1989-12-18 1991-06-27 Cotterill Michael J Systeme de support pour clavier a commande selective
CA2124893A1 (fr) * 1994-02-24 1995-08-25 Lon D. Seidl Surface basculante et coulissante pour table

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2196606A (en) * 1986-09-15 1988-05-05 Lauri Koistinen Device for raising, lowering and/or inclining objects such as table tops, drawers and the like
GB2214069A (en) * 1988-01-20 1989-08-31 Krause Robert Gmbh Co Kg An adjustment device for adjusting the tilt and/or height of a bench or table top of a piece of furniture
WO1991008694A1 (fr) * 1989-12-18 1991-06-27 Cotterill Michael J Systeme de support pour clavier a commande selective
CA2124893A1 (fr) * 1994-02-24 1995-08-25 Lon D. Seidl Surface basculante et coulissante pour table

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011100807A1 (fr) * 2010-02-22 2011-08-25 Edwin Russell Mécanisme de support
US9441784B2 (en) 2010-02-22 2016-09-13 3D Space Arms Pty Ltd Support mechanism

Also Published As

Publication number Publication date
CA2295025A1 (fr) 1999-11-25
AUPP355898A0 (en) 1998-06-11

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