Ergonomic typist vertebral support

Information

  • Patent Grant
  • 6325342
  • Patent Number
    6,325,342
  • Date Filed
    Wednesday, March 15, 2000
    24 years ago
  • Date Issued
    Tuesday, December 4, 2001
    23 years ago
  • Inventors
  • Examiners
    • Ramirez; Ramon O.
    • Le; Tan
    Agents
    • Charmasson; Henri J. A.
    • Buchaca; John D.
Abstract
Vertebral strain relief is provided to a keyboard or other data input device operator by a support device attached to the desktop or other data input device-holding structure and projects obliquely and upwardly under the forearms and elbows of the operator to create the same type of upper body support provided by the arms of an armchair. The support structure comprises a pair of telescopic tubular members which provides for height and distance adjustment of the support member as well as its placement, in stowed position, in level contact with the edge of the working surface.
Description




FIELD OF THE INVENTION




This invention relates to office equipment such as desks and computer work stations, and more particularly to good-posture maintaining devices and upper body supports for persons sitting at a desk or work station and operating a keyboard, mouse or other data entry instrument.




BACKGROUND OF THE INVENTION




Typist and computer operators who spend long hours sitting at a desk or work station operating a keyboard, mouse, input pad or other manipulable data entry instrument are subject to neuromyalgic traumas such as cervical, dorsal and cervico-brachial neuralgia. Persons already affected by arthritis, kyphotic or scoliosic disorders are often unable to withstand long periods of work sitting at a desk or work station. The above-described pathological phenomena are due to both the gravitational pull of the arms upon the scapular girdle, and bad posture imposed by faulty seat and improper height setting of the seat or work surface.




The prior art already offers devices designed to avoid or relieve carpo tunnel syndrome, tendinitis and other hand and wrist pathological conditions. Exemplary embodiments of such devices are disclosed in: U.S. Pat. No. 4,482,063 Berke et al., EPO Application No. 90123968.1 Edtech Co., British Application NO. 2,249,053A Ledesma; and U.S. Pat. No. 5,402,972 Schmidt. Those embodiments are not configured to support the upper body and relieve or avoid any spinal, scapular or brachial traumas, but are strictly intended, shaped and dimensioned to support the wrists or the distal portions of the user's forearm providing no convenient support surfaces for the elbows or proximal portions of the forearms against which the weight of the upper body could come to bear. The instant inventor is believed to be the first to identify the mechanical causes of the upper body neuromyalgic syndromes and to devise an effective remedial solution.




SUMMARY OF THE INVENTION




The principal and secondary objects of this invention are to avoid or relieve neuromyalgic traumas of the spine and shoulders, caused by long periods of sitting at a desk or work station while operating a keyboard, mouse, input pad or other manipulable data entry instrument, by providing a convenient comfortable and effective support of the scapular girdle and spine through the upper arms.




These and other valuable objects are achieved by the device that places pads or support bars in supporting contact with the elbows and proximal end sections of the operator's forearms nearest the elbows. The support member comprises a pair of telescopic segments which are cantilevered from a support bracket attached under the desktop structure. The height and distance of the support member from the desktop structure is adjusted by axial movement of one of the telescopic segments and, in an alternate embodiment, by pivotal movement of the arm.











BRIEF DESCRIPTION OF THE DRAWING





FIG. 1

is a side view of a vertebral support device according to the invention;





FIG. 2

is bottom plan view of the support bar;





FIG. 3

is a detail cross-sectional view of the axial adjustment mechanism;





FIG. 4

is a front view of the bearing bracket;





FIG. 5

is a side view of a first alternate embodiment of the invention;





FIG. 6

is a side view of a second alternate embodiment of the invention; and





FIG. 7

is a side view of a third alternate embodiment of the invention.











DESCRIPTION OF THE PREFERRED EMBODIMENT OF THE INVENTION




Referring now to the drawing there is shown in

FIG. 1-4

a first embodiment of a vertebral strain relief device


1


according to the invention. The device is designed to be fitted to a work bench or desktop structure


2


or any other similar structure designed to hold a keyboard


3


, mouse or other type of manipulable data input instrument.




The device comprises a padded forearm support member or pad


4


mounted at the proximal end section


5


of a lever


6


whose distal end section


7


extends under the desktop structure


2


. The lever is supported by a bearing bracket


8


near the proximate edge


9


of the desktop surface


2


. The bearing bracket


8


, more specifically illustrated in

FIG. 4

, comprises a C-clamp


10


shaped and dimensioned to engage over the edge


9


of the desktop surface including a tightening screw


11


. The lever


6


is made of two telescopically engaged tubular segments


12


and


13


. The proximal segment


12


comprises the proximal end section


5


which is secured to the arm support


4


. It is axially and adjustably engaged into the distal segment


13


. The proximal segment can be adjustably set into the distal one at a plurality of discrete positions determined by a pressure-sensitive nib and hole mechanism


14


more specifically illustrated in

FIG. 3. A

series of holes


15


in the wall of the distal segment


13


are shaped and dimensioned to be engaged by a nib


16


protruding from the wall of the proximal segment


12


. The nib


16


is biased outwardly by a leaf-spring


17


mounted inside the proximal segment. The distal end section


7


of the distal segment


13


is fitted with an adjustable spacer mechanism


18


oriented toward the undersurface of the desktop structure


2


. Basically, the spacer mechanism consists of a screw


19


having a knurled head


20


bearing against the underside of the desktop structure and a threaded stem engaged into a nut


21


mounted in the lumen opening of the distal end section


7


. The proximal segment


12


is dimensioned to bring the support member


4


in supporting contact with the elbow or proximal portion


22


of the user's forearm when fully or near fully extended. When the proximal segment


12


is fully engaged into the distal segment


13


, the support member


4


is brought down into a position flush and level with the edge


9


of the desktop structure


2


as illustrated in dotted line in FIG.


1


.




Typically, the device comprises two lever structures positioned astride the user and joined by a common support member more specifically illustrated in FIG.


2


. It should be understood that two lever structures could be used, each fitted with their own separate independent support member. The common support member comprises a bar


23


attached at either end to the proximal end section


5


of the proximal segments


12


. The support member


4


is padded by a layer of synthetic foam material


24


covered with a synthetic skin


25


. Alternately, a single lever structure could be used connected to a median portion


26


of the bar as shown in dotted line in FIG.


2


.




In a first alternate embodiment


27


of the invention as illustrated in

FIG. 5

, the attachment of the bearing bracket


28


to the desktop undersurface is accomplished by gluing or screwing in a permanent or semi-permanent manner to the undersurface


29


of the desktop structure. Moreover, the bracket comprises a pivot point forming a fulcrum for the lever structure about a horizontal axis


30


substantially parallel to the proximal edge


9


of the desktop structure.




In a second alternate embodiment


31


of the invention illustrated in

FIG. 6

, the bearing bracket comprises a sturdy attachment


32


to the undersurface


29


of the desktop structure, and the distal segment of the lever is reduced to a short section


33


that does not extend distally under the desktop structure.




In the third embodiment of the invention


34


illustrated in

FIG. 7

, the proximal segment


35


of the lever


36


is secured to the distal segment


37


by a parallelogrammic linkage mechanism. The mechanism consists of two pairs of parallel swing plates


38


,


39


rotatively attached at opposite ends to the two lever segments. The mechanism allows the swinging translation of the proximal segment


35


from the operating position illustrated in the drawing to a stowed position under the work surface.




It should be understood that the features of the above-described embodiments can be shared among them to match the particular geometry of the desktop structure and the anatomy of the user.




While the preferred embodiments of the invention have been described, modifications can be made and other embodiments may be devised without departing from the spirit of the invention and the scope of the appended claims



Claims
  • 1. The combination of a manipulable data input instrument and its supporting structure having an undersurface with a device attached to said undersurface and positioned to provide vertebral strain relief to an operator of said instrument by supporting a proximal portion of at least one of said operator's forearms, said device comprising:a support member shaped and dimensioned to supportively contact said proximal portion when said operator operates said instrument; means for adjustably setting the height and distance of said support member in relation to said structure. wherein said support member comprises an arm resting pad, a lever fixedly secured about a median portion to said undersurface, said lever having a segment mounting said pad and extending from said median section in an oblique and upward direction to place said pad under said proximal portion; and wherein said segment including first and second sections connected to allow axial length adjustment of said segment.
  • 2. The device of claim 1, wherein said lever comprises:a proximal segment mounting said pad; a distal segment secured to said undersurface; and a parallelogrammic linkage mechanism between said proximal and distal segments, to swingingly translate the proximal segment from an extended operation position to a stowed position under said undersurface.
  • 3. A device attached to the undersurface of a structure holding a manipulable data input instrument, and designed to provide vertebral strain relief to an operator of said instrument by supporting a proximal portion of at least one of said operator's forearms, said device comprising:a support member shaped, dimensioned and positioned to supportively contact said proximal portion when said operator operates said instrument; means for adjustably setting the height and distance of said support member in relation to said structure; wherein said support member comprises an arm resting pad, a lever secured about a median portion to said undersurface, said lever having a segment mounting said pad; said segment including first and second sections connected to allow axial length adjustment of said segment; and wherein said means for adjustably setting further comprise: said lever having a proximal end, a distal end and a median fulcrum point; means for rotatively securing said fulcrum point to said undersurface about a horizontal first axis; said first section being connected to said means for securing, and said second section being attached to said pad; means for adjustably locking the rotational orientation of said lever about said fulcrum point; whereby the distance of said member from said structure can be set by axial adjustment of said sections in relation to each other, and the height of said pad can be set by rotational adjustment of said lever about said axis.
  • 4. The device of claim 3, wherein said means for adjustably locking said orientation comprise a variable-length spacer between said distal end of the lever and said undersurface.
  • 5. The device of claim 4, wherein said means for rotatively securing comprise a bearing bracket attached to said structure.
  • 6. The device of claim 3, wherein said device is shaped, dimensioned and positioned to bring said pad in level contact with said structure in a stowed position.
  • 7. A structure for supporting the proximal part of a person's forearm while said person is working on a desktop, said structure comprising:a support bracket attached proximate an edge of said desktop nearest said person; a lever secured to said bracket, wherein a distal segment of said lever extends obliquely beyond said support bracket and under said desktop, and a proximal segment of said lever extends obliquely and upwardly ahead of said bracket toward said person; and extension rod projecting axially and adjustably from said proximal segment toward said person; said extension rod having minimum and maximum extension positions; a support member mounted at a proximal end section of said extension rod, said support member being shaped and oriented to supportively contact said proximal part of the person's forearm; and an adjustable spacer mounted on a distal section of said distal segment, said spacer being oriented to contact said desktop.
  • 8. The device of claim 7, wherein said lever is positioned and dimensioned to bring said support in contact with said desktop edge when said extension rod is at its minimum extension position.
  • 9. The device of claim 7, wherein said bearing bracket comprises a clamp shaped and dimensioned to securably engage upon said desktop edge.
  • 10. The device of claim 7, wherein said bearing bracket comprises an attachment to an undersurface of said desktop.
Priority Claims (2)
Number Date Country Kind
9903634 Mar 1999 FR
0000534 Jan 2000 FR
US Referenced Citations (12)
Number Name Date Kind
4482063 Berke et al. Nov 1984
5037054 McConnell Aug 1991
5104073 Van Beek et al. Apr 1992
5211367 Musculus May 1993
5342006 Tice Aug 1994
5402972 Schmidt Apr 1995
5407249 Bonutti Apr 1995
5462247 Aldrich Oct 1995
5465931 MacDonald Nov 1995
5564667 Copeland et al. Oct 1996
5566915 Hansare Oct 1996
6042064 Hong Mar 2000
Foreign Referenced Citations (3)
Number Date Country
2203265 Aug 1973 DE
8433867A1 Jun 1991 EP
2249053A Apr 1992 GB