Ergonomic computer workstation and method of using

• US 5,857,415 A
• Filed: 08/10/1995
• Issued: 01/12/1999
• Est. Priority Date: 08/24/1993
• Status: Expired due to Fees

• Current Assignee: Paul E. Richard
• Original Assignee: Paul E. Richard
• Inventors: Richard, Paul E.
• Primary Examiner(s): Chen, Jose V.
• Application Number:
  US08/513,300
• Time in Patent Office: 1,251 Days
• Field of Search: 108/50, 108/147, 108/10, 108/50.01, 108/50.02, 312/223.3, 312/194, 312/196, 248/920, 248/917, 248/918, 248/919, 248/921, 248/922, 248/923
• US Class Current: 108/50.01
• CPC Class Codes: A47B 2021/0321 Keyboard supports
• CPC Class Codes: A47B 2021/0328 of the pantograph type
• CPC Class Codes: A47B 2021/0335 mounted under the worksurface
• CPC Class Codes: A47B 21/0073 liftable above the desk top
• CPC Class Codes: A47B 21/0314 Platforms for supporting office equipment

Abstract

A computer workstation is provided with a movable support for a video monitor which is counterbalanced such that it may be moved with a minimum exertion and a coordinated keypad for support of the keyboard for the computer is also arranged in a counterbalanced fashion for movement with a minimum exertion by the operator, both of such structures being coordinated together to provide a universally adjustable monitor work system station which both allows and encourages the operator to periodically make adjustments in the position of the various components so as to decrease or eliminate repetitive strain-type injuries which may be brought on by long continued exactly repetitive movements. The video monitor is adjustably supported with a dual adjustable support.

Claims

1. An ergonomically designed computer work station comprising:

(A) a base means for location in a stationary position upon a supportive surface adjacent to a reference position, being the intended or projected work position of a computer operator,

(B) a video monitor support means mounted upon such base,

(C) said support means being universally adjustable within mechanically predetermined outer limits to any position in a vertically oriented plane passing through said projected work position and the base of the support means,

(D) said support means being adjustable along the plane in upwardly and downwardly and forwardly and backwardly directions in every position on the plane within the predetermined limits,

(E) said support means being constructed as a paired structures mechanically counterbalanced such that when adjusted for the weight of the support and a video monitor it can be moved along the plane with only a minimum exertion of force and upon removal of said force will remain in the position in which it was at the cessation of the application of the force,

(F) the especially predetermined outer limits of movement in the vertical plane being from a position within less than one dimension of the video monitor from the supportive surface to not less than substantially eye level of a projected operator in the reference position in a vertical direction and in a horizontal direction not less than from substantially directly over the base to within about a horizontal distance from the reference position which is the long leg of a right triangle the hypotenuse of which is the resting convergence distance of an average human eye with a line of vision extending at a downward angle of thirty-five degrees,

(G) a keypad supported in a counterbalanced fashion upon two support arms at least indirectly mounted with respect to said base means such that said keypad is movable in a vertical plane passing through the reference position at least twelve inches in a vertical direction as well between,

(H) the keypad support arms being mechanically counterbalanced such that the keypad can be moved to a desired vertical position with only a minimum of exertion of force and upon removal of said force will remain in the position in which it was upon the cessation of the removal of the force,

(I) a locking means for rendering the keypad immovable during contact with the hands of an operator at the reference position during the keying in of data upon a keyboard supported by the keypad.

2. An ergonomically designed computer workstation in accordance with claim 1 wherein a force required to move the computer monitor is not greater than six (6) pounds.

3. An ergonomically designed computer workstation in accordance with claim 2 wherein the force required to move the computer monitor is not greater than four (4) pounds and the force to move the keypad is not greater than three (3) pounds.

4. An ergonomically designed computer work station in accordance with claim 1 wherein the video monitor support means is arranged and constructed such that the video monitor view screen is inclined to maintain it perpendicular to the line of sight of an operator seated at the reference position of the input station over a range of elevations of the video monitor.

5. An ergonomically designed computer work station in accordance with claim 4 wherein the keypad support is arranged and constructed to be have its inclination mechanically varied so it may be inclined both forwardly and backwardly.

6. An ergonomically designed computer work station in accordance with claim 5 wherein the components of the computer work station are incorporated into a piece of furniture having an upper work surface and at least two side surfaces.

7. An ergonomically designed computer work station in accordance with claim 5 wherein the monitor support and the keypad support are counterbalanced by spring means.

8. An ergonomically designed computer work station in accordance with claim 7 wherein the monitor support is arranged and constructed to raise the monitor to an elevation above the line of sight of the position of an operator seated at the work station while maintaining the inclination of the monitor perpendicular to the line of sight of the operator.

9. An ergonomically designed computer work station in accordance with claim 7 wherein the keypad support means is arranged and designed to support varying keypads attached to such supports to provide different keypad configurations in accordance with the desire of the operator.

10. An ergonomically designed computer work station in accordance with claim 7 wherein the upper edges of the keypad are rounded to eliminate any angular surfaces that might protrude against the hands or wrists of the operator.

11. An ergonomically designed computer work station in accordance with claim 5 wherein the two keypad support arms are connected by a coordinating bar which serves also as a brace for the keypad.

12. An ergonomically designed computer workstation in accordance with claim 7 wherein an interlock on the keypad support arms allows the keypad to be raised without release of such interlock, but restricts downward movement unless such lock is released.

13. An ergonomically designed computer workstation in accordance with claim 7 wherein the range of movement of the video monitor support means is 12 inches in the vertical direction and 12 inches in the horizontal direction and the range of movement of the keypad is twelve inches in the vertical direction.

14. An ergonomically designed computer work station in accordance with claim 13 wherein the range of movement of the video monitor support means is 16 inches in the vertical direction and 12 inches in the horizontal direction.

15. A computer monitor support for an ergonomically designed computer station comprising a dual pair of articulated spring counterbalanced support arms having at least two continuous articulated leg portions including upper and lower leg portions the lower leg portion being pivotably mounted upon a base and the upper leg portion having a monitor support means pivoted to said upper leg portion for motion about a horizontal axis toward and away from the upper leg portion by means of a single link lever means provided between a side of the upper leg and one end of the monitor support means such that as the two articulated leg portions are folded together lowering the monitor support means and any monitor supported thereupon the monitor support means is inclined progressively upwardly to maintain the view screen of any such monitor substantially perpendicular to the line of sight of an operator seated at a reference position in relation to the computer station.

16. A method of preventing repetitive strain injuries in computer operators comprising:

(1) providing a computer work station incorporating;

(a) a dual video monitor support adjustable for movement within predetermined outer limits to any position upon a plane positioned substantially vertically and passing through the video monitor support and the position of the operator of such station,

(b) a keypad supported by keypad support arms which allow the keypad to be adjusted to any position in the plane of monitor support adjustment within predetermined verified limits,

(c) said adjustable positions of the video monitor support and keypad support and associated keypad approaching each other and the keypad being also adjustable to various angles,

(2) adjusting the monitor support and the keypad support and associated keypad to a first position relative to each other and the reference position and maintaining such position for a short period,

(3) readjusting the monitor support and keypad support and associated keypad to a second position relative to each other and maintaining such position for a short period,

(4) repeating the adjustment of the monitor support and keyboard support periodically throughout the working period of an operator at the computer work station.

17. A method of preventing repetitive strain injuries in computer operations in accordance with claim 16 wherein the adjustment of the monitor support and the keyboard supports include adjustment of such supports in a series of a large number of different relative positions with each other, each relative position being dissimilar from previous positions through a plurality of changes before any given relative position is repeated.

18. A method of preventing repetitive strain injuries in computer operators in accordance with claim 17 wherein the relative positions of the keypad supports and associated keypad include various inclinations of the keypad and associated keyboard.