Standing desks, and sit/stand convertible desks, are gaining in popularity. A standing desk typically provides a flat planar horizontal desktop at about the height of the user's sternum, or a few inches lower. A sit/stand convertible desk also provides a single flat planar horizontal desktop, but it can be raised and lowered between about sternum height, for use when standing, and a significantly lower height, for use when sitting.
These desks greatly increase the ease of moving the desktop between appropriate heights for sitting and standing. A computer monitor resting on the desktop also moves along with the desktop to be at eye level in both positions. However, if a keyboard and/or mouse also moves along with the desktop, the keyboard and mouse height is too high in the standing position, causing the user's shoulders to tighten in an awkward and ergonomically undesirable way.
Furthermore, the prior art contains keyboard and mouse trays, some of which are adjustable. However, these trays fail to allow ample vertical range of motion or full transition to flush with the primary desktop surface when the user is sitting. Beyond that, these trays are typically tilted toward the user (a positive angle), when research shows that this positive angle actually increases repetitive motion injuries, especially those in the wrist.
A desktop includes a first desktop portion, a second desktop portion, and a linkage assembly attached to the first and the second desktop portions. The first desktop portion has a first, substantially planar, upper surface, and an edge. The second desktop portion has a second, substantially planar, upper surface, a proximal edge, and a distal edge. The linkage assembly is configured such that the second desktop portion is movable between a first configuration and a second configuration. At the first configuration, the second desktop portion is substantially coplanar with the first desktop portion, and the proximal edge of the second desktop portion is adjacent the edge of the first desktop portion. At the second configuration, the proximal edge of the second desktop portion is beneath the edge of the first desktop portion, and the second desktop portion is not coplanar with the first desktop portion and is not parallel to the first desktop portion.
In the second configuration, the proximal edge of the second desktop portion may be beneath the edge of the first desktop portion and beneath the distal edge of the second desktop portion. In the second configuration, the second desktop portion may be angled at about 8° to about 30° with respect to the first desktop portion.
In the second configuration, the distal edge of the second desktop portion may be beneath the edge of the first desktop portion, and the proximal edge of the second desktop portion may be beneath both the edge of the first desktop portion and the distal edge of the second desktop portion.
The second desktop portion may be movable between the first configuration and the second configuration by a manual manipulation of a user without tools.
The linkage assembly may include a first link extending transverse from the first desktop portion; a second link pivotally attached to the first link and pivotally attached to the second desktop portion; a third link pivotally attached to the second desktop portion; and a fourth link extending transverse from the first desktop portion and pivotally attached to the third link.
The first link may include a stop that interferes with the second link when the second desktop portion is in the second configuration. This interference may act to maintain the second desktop portion in the second configuration.
In the first configuration, the third link may be oriented such that downward force on the second desktop portion maintains the second desktop portion in the first configuration.
The desktop may further include a lip. In the second configuration, the lip may present an upwardly extending surface transverse to the proximal edge of the second desktop portion.
The lip may be movable by the user, or may be automatically moved by the linkage assembly, such that the lip does not present the upwardly extending surface when the second desktop portion is in the first configuration.
Also disclosed is a desk which includes the above-described desktop, mounted on one or more legs, pillars, or posts.
Exemplary embodiments will be described in more detail with reference to the accompanying drawings, in which:
Embodiments described herein provide a desktop which includes a main working surface and a platform for a keyboard and/or mouse, which platform is adjustable with respect to the main working surface. A bistable linkage assembly allows a user to move the platform between a home position, at which the platform is substantially horizontal and flush with the main working surface, and a dropped position, at which the platform is beneath the main working surface and tilted downward away from the user, with a simple, intuitive manual adjustment that does not require any tools or particular physical strength. The bistable linkage assembly also allows the platform to maintain both the home position and the dropped position without the need for latches, clamps, or fasteners.
Recent research shows that the ergonomically optimal angle for a keyboard and mouse is at a negative angle (i.e. with the end farthest from the user lower than the end closest to the user) of about 8° to 30°. This is true regardless of whether the user is sitting or standing, but many users find a negative platform angle when seated extremely awkward. The platform may rest on or dig into the user's thighs, and the position is unfamiliar. Therefore, many users prefer to have a flush, horizontal keyboard and mouse platform when seated.
Standing, however, provides additional clearance and a large range of motion that feels comfortable and natural. Therefore, for a sit/stand adjustable desk, it is extremely desirable to provide a keyboard and mouse platform that can move between two positions: flat and flush when the desktop is at the sitting height, and at a negative angle when the desktop is at the standing height.
Furthermore, some users may choose to have a unitary working surface for certain tasks, such as writing or sketching by hand with the keyboard and/or mouse set aside, and a keyboard and mouse platform with a negative angle for other tasks.
Turning now to the Figures, with particular reference to
The linkage assembly 20, 30 provides full support and produces the desired movement of the platform. A built-in hardstop 36 (
With reference to
As seen in
To move the platform 14 to the dropped position of
To move the platform back, the user pulls up and toward him- or herself, and the platform begins reversing its movement.
It will be appreciated that, in the point in the platform 14's travel at which the links 24, 34 are approximately collinear with each other and with the platform 14, the linkage system presents enough degrees of freedom that the platform 14 may assume positions and orientations other than that which will lead it back smoothly to the home position. For example, in one undesirable scenario, starting from the fully dropped position seen in
Therefore, turning back to
l34=3.500″
l14=8.875″
l24=2.125″
d2=10.310″
l
34
+l
14
−l
24=10.250″<d2=10.310″
Thus, it will be seen that this particular exemplary embodiment provides 0.060″ of interference, providing for the above-described snap.
It will be appreciated that when lowering the platform 14 in the reverse order, the motion of the platform 14 is aided by gravity, so no undesirable configurations such as those seen in
Turning back to
Some embodiments include a lip 38 integrated with one or both of the links 34, which may keep mouse, keyboard, and small items like pens from sliding or rolling off the back of the platform 14 when the platform 14 is in the dropped position. Turning to
Other embodiments of the lip are possible. For example, a lip may be fixed to the platform 14 or the main working surface 12. Still further, a lip may be separately slidable or pivotable into and out of position by a separate manipulation of the user, rather than being integrated with the motion of the linkage assembly 20, 30.
In a presently preferred embodiment, the desktop 10 is provided merely as a desktop, i.e. as a modular component of a desk, to later be attached to legs or posts to define a completed desk. This installation can be done by a retailer or by the end user. Thus, retailers that offer optional features and modular components can easily integrate the exemplary desktop into any configuration a user desires, such as a sitting desk, a standing desk, or a sit/stand convertible desk. The latter of these, a sit/stand convertible desk 100, is shown in
However, the present invention is not limited to such a modular form. The above-described desktop 10 may be integrated into a completed desk 100 of any fixed or adjustable height. It is also contemplated that the linkage assembly 20, 30 may be sold on its own, as a kit, to allow a retailer or end user to modify an existing desktop into one with a droppable platform 14, such as by cutting an existing monolithic desktop into two pieces 12, 14, and attaching the linkages 20, 30.
As will be understood by those skilled in the art, the present invention may be embodied in other specific forms without departing from the essential characteristics thereof. Many other embodiments are possible without departing from the essential characteristics thereof. Many other embodiments are possible without deviating from the spirit and scope of the invention. These other embodiments are intended to be included within the scope of the present invention, which is set forth in the following claims.
This application is a continuation of Non-provisional application Ser. No. 14/876,814, filed Oct. 6, 2015 which claims priority to U.S. Provisional Application No. 62/034,110, filed Aug. 6, 2014, the disclosure of which is hereby incorporated by reference.
Number | Date | Country | |
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Parent | 14876814 | Oct 2015 | US |
Child | 16659412 | US |