KEYBOARD SUPPORT APPARATUS

Abstract: A keyboard support apparatus includes two substantially rigid parallel rods (1 and 2). Each of the rods has a first respective bracket (3 and 6) at one end. Each rod is also slidably connected to a second respective bracket (4 and 5). Also the rods are interconnected via keyboard mounting body (9) which makes a slidable connection with each rod. A manually operable screw (16) fits into a threaded hole in the mounting body (9) and may be adjusted to bear against one of the rods (1 or 2) and thereby prevent the mounting body (9) from sliding along the rods (1 and 2). A keyboard or a keyboard shelf is mounted in front of the keyboard mounting body (9) by means of a further structure which connects the underside of the keyboard or shelf to the underside of the mounting body (9). When the support apparatus is screwed to the underside of the desk the keyboard may be slid under the desk or pulled out in front of the desk. A preferred structure for mounting the keyboard onto the keyboard mounting body is also described.

Description: Title: "KEYBOARD SUPPORT APPARATUS" Technical Field This invention relates to a support apparatus suitable, but not exclusively, for supporting an electronic keyboard from a desk. Background Art Electronic keyboards are commonly used on desks in offices and it is desirable to present the keyboard to the operator at a convenient position and orientation. Owing to the wide range in the requirements of keyboard operators it is known to provide versatile keyboard supports which may be adjusted to present the keyboard in a convenient position and orientation. Such keyboard supports suffer from the drawback that they are cumbersome and difficult to adjust. In particular it is a problem that after the keyboard has been moved from its working position, in order for the desk to be used for another purpose, a lengthy adjustment procedure is necessary before" the keyboard can be returned to the optimum working position. Disclosure of Invention According to one aspect of the invention as presently contemplated, there is provided a keyboard support apparatus including: two substantially rigid parallel rods each having a first respective bracket at one end, each rod being slideably connected to a second respective bracket, the rods being interconnected by a keyboard mounting body which makes a slideable connection with each rod; and a manually operable threaded member which adjustably co-operates with a threaded part of the mounting body in order to releasably bear against one of the rods; the arrangement being such that, in use, the brackets are connected to a supporting surface and the mounting body may translate, when the threaded member is released, along the rods betweeen the first brackets and the second brackets. Advantageously the keyboard mounting body supports a keyboard, by means of a further structure, in such a position that when the mounting body is at one extreme of its travel the keyboard extends beyond the end of the support surface, and when the mounting body is at the other extreme of its travel the keyboard is concealed by the supporting surface. Also advantageously the further structure includes: a third bracket and a fourth bracket interconnected by first, second and third elongate members; said first and second elongate members are pivotally attached by means of a first pivot pin to said third bracket; said first elongate member is also pivotally attached by means of a second pivot pin to said fourth bracket; said third elongate member is pivotally attached by means of a third pivot pin to said third bracket; said second and third elongate members each have a slot both of which engage a fourth pivot pin associated with said fourth bracket; wherein the fourth pivot pin is essentially a threaded bolt with which a manually operable nut adjustably co-operates in order to releasably clamp the second and third elongate members and the fourth bracket; the arrangement being such that, in use, the third and fourth brackets are connected to a supporting surface and a keyboard respectively, and the elongate members may move, when the nut is released, substantially in the same plane between limits determined by the lengths of the two slots. Brief Description of Drawings A preferred embodiment will now be described by way of example only with reference to the accompanying drawings in which: Figure 1 shows a perspective view of a keyboard support apparatus embodying the invention; Figure 2 shows a plan view of the keyboard support apparatus shown in Figure 1; Figure 3 shows a perspective view of a further keyboard support apparatus embodying a second aspect of the invention; Figure 4 shows a detail of part of the further keyboard support apparatus shown in Figure 3; Figure 5 shows a side view of the further keyboard support apparatus shown in Figure 3 at one extreme of its travel; and Figure 6 shows a side view of the further keyboard support apparatus shown in Figure 3 at the other extreme of its travel. Best Mode for Carrying out Invention Referring now to Figures 1 and 2 the keyboard support apparatus comprises two rods 1 and 2 which are supported by four brackets 3, 4, 5 and 6. Brackets 3 and 6 are fixed at corresponding ends of rods 1 and 2 respectively. Brackets 4 and 5 are slideably mounted on rods 1 and 2 respectively by sleeve mountings 7 and 8. Rods 1 and 2 are interconnected by a keyboard mounting body 9. Mounting body 9 has two pairs of attaching members 10 and 11, and, 12 and 13, one pair on either side. The attaching members are penetrated by holes through which the rods 1 and 2 pass. In use brackets 3, 4, 5 and 6 are attached, for instance by means of screws, to the underside of a supporting surface, for instance a desk top. Brackets 3 and 6 are fixed near the front of the desk, while brackets 4 and 5 may be fitted at any desired distance underneath the desk. Keyboard mounting body 9 is then able to slide along rods 1 and 2 between the front brackets 3 and 6 and the rear brackets 4 and 5. Positioning of the rear brackets 4 and 5 determines the extent of travel permitted. Attaching members 10, 11, 12 and 13 of mounting body 9 are fitted with bushings 14 made of plastics material. Bushings 14 ensure smooth and silent travel of the keyboard mounting body along the rods. Bushings 14 may be fitted with heads 15 of large diameter which may be partly recessed into the attaching members in order to provide a cushioning stop. One of the front attaching members, for instance 13, may be penetrated by a threaded hole into which a threaded stem 16 may be inserted. The attaching members have "a hexagonal section and the threaded hole penetrates one of the faces perpendicularly such that it subtends 30 from the horizontal. The stem 16 supports a large handgrip 17 by means of which an operator may tighten the stem against the side of the bushing 14. In this way keyboard mounting body 9 may be locked into any selected position. The fact that pressure is applied to rod 2 in order to lock it by means of bushing 14 prevents damage to the rod 2 by the end of stem 16. The locking operation may be improved by the provision of slots 18 in the side of the appropriate bushing 14. These allow greater flexibility in the bushing. The snugness with which bushings 14 grip the rods 1 and 2 determines the speed with which mounting body 9 can be moved. This allows the operation to be effected by means of an ergonomically satisifying quanta of pressure applied by the operator. Keyboard mounting block 9 may be perforated by holes to facilitate attachment of a keyboard. Preferably the holes are spaced according to the International furniture standards, which for example permits 32 mm between hole centres. Alternatively, rows of slots 19 may be provided, in this case the longitudinal axis of the slots are separated by, for instance, 32 mm. Keyboard supporting members 20 and 21, to which the keyboard is attached may then be bolted into convenient holes or slots in the mounting body 9. The arrangement is such that the keyboard may be held either beneath the desk, when mounting body 9 is pushed back to rear brackets 7 and 8, or alternatively, in front of the desk, when mounting body 9 is pulled forward to front brackets 3 and 6. Of course any intermediate desired position is also available. It may well be desirable to attach the keyboard to mounting body 9 by means of a more versatile mounting structure» In particular the mounting structure shown in Figures 3 to 6 may be advantageously used, and this will now be described. Keyboard attaching bracket 22 to which a keyboard or shelf may be bolted, is connected to keyboard mounting block attaching bracket 23 by means of two parallel elongate members 24 and 25. Elongate member 24 is attached to bracket 23 by means of pivot pin 27, and attached to bracket 22 by means of pivot pin 26. Elongate member 25 is attached to bracket 23 by means of pivot pin 28, and is attached to bracket 22 by means of pivot pin 29 which resides in longitudinal slot 30 of elongate member 25. A third elongate member 31 interconnects brackets 22 and 23. Elongate member 31 is attached to bracket 23 by means of pivot pin 27 and is attached to bracket 22 by means of pivot pin 29 which engages in longitudinal slot 32 of member 31. Bracket 22 is connected at one side of the underside of a keyboard, and bracket 23 is connected at one side of the underside of keyboard mounting body 9 (for instance by bolts which pass through holes in the overhang 35 of bracket 25 and through the holes or slots 19 of mounting body 9) . Further brackets 33 and 34 are be connected to the other sides of the keyboard and mounting body in order to prevent rotation of the keyboard with respect to the mounting body. Brackets 33 and 34 are interconnected by a further elongate member 35 which is pivotally attached at either end by means of pivot pins 36 and 37 respectively. An alternative arrangement would be to connect brackets 22 and 23 at the centres of the keyboard and keyboard mounting body, in which case brackets 33 and 34 could be dispensed with. A cross member 38 provides the final degree of stability to the structure. A comparison of Figures 5 and 6 will indicate that only a limited amount of pivotal movement is possible by elongate members 24 and 25 around pivot pins 27 and 28. The precise amount of movement permitted is determined by the length of the slot 30. In Figure 6 it can be seen that bracket 22 may be tilted in a clockwise direction about pivot 26 an amount determined by the length of either slot 30 or slot 32. It should be appreciated that rotation is possible by any desired amount between the two extreme positions shown in Figures 5 and 6 respectively. Also, at any intermediate position between the two extremes shown some degree of tilt is possible. Pivot pin 29 is essentially a threaded bolt, that is at least some part of the pin which extends beyond the surface of elongate member 25 is threaded. A nut, preferably turnable by hand, may be tightened or loosened on the threaded portion of pivot pin 29 in order to clamp or release elongate members 25 and 31, and bracket 22. This is illustrated in greater detail in Figure 4. It is an advantage of this arrangement that the structure may be adjusted to desired angle and tilt with one hand. To facilitate operation and to counteract the weight of the keyboard a spring -39 may be provided connecting the elongate member 25 and bracket 22. Spring 39 comes under greater tension when bracket 22 is moved downwards with respect to bracket 23. That is when the arms of the spring are compressed together. This has the effect of returning the desktop to the horizontal. A further spring 40, for instance a coil spring, may connect an overhang 35 of bracket 23 to elongate member 25. This spring also comes under greater tension when bracket 22 is moved downwards with respect to bracket 23. The action of the spring therefore serves to return bracket 22 and therefore the keyboard, to its highest position. Although the invention has been described with reference to a specific example, it will be appreciated by those skilled in the art that the invention may be embodied in many other forms. For instance, the invention has been described with reference to structures suitable for right-hand operation when mounted under the operator's desk, but it should be clear that left-handed operation is equally possible and may be facilited by mirror image construction. It is also feasilbe that dual-controls may be provided on either side of the structure, both or either of which may be used to control the movements. It should also be appreciated that the shapes of all the brackets and bodies need not be limited to those shown. Also the elongate members and rods need not have the cross section shown. Furthermore it is not essential for keyboard mounting body 9 to be provided with attaching members since rods 1 and 2 may pass directly through the body.

Claims: CLAIMS 1. A keyboard support apparatus including: two substantially rigid parallel rods each having a first respective bracket at one end, each rod being slideably connected to a second respective bracket, the rods being interconnected by a keyboard mounting body which makes a slideable connection with each rod; and a manually operable threaded member which adjustably co-operates with a threaded part of the mounting body in order to releasably bear against one of the rods; the arrangement being such that, in use, the brackets are connected to a supporting surface and the mounting body may translate, when the threaded member is released-, along the rods betweeen the first brackets and the second brackets. 2. A keyboard support apparatus as claimed in Claim 1 wherein said threaded part of the mounting body comprises a hole which penetrates the keyboard mounting body at between 20 and 40 to the horizontal. 3. A keyboard support apparatus as claimed in Claim 1 or 2 wherein plastic sleeves are interposed between the mounting body and said slideable connection with each rod. 4. A keyboard mounting support apparatus as claimed in Claim 2 or 3 in which the keyboard mounting body ' supports a keyboard, by means of a further structure, in such a position that when the mounting body is at one extreme of its travel the keyboard extends beyond the end of the support surface, and when the mounting body is at the other extreme of its travel the keyboard is concealed by the supporting surface. 5. A keyboard support apparatus as claimed in Claim 4 wherein said further structure includes: a third bracket and a fourth bracket interconnected by first, second and third elongate members; said first and, second elongate members are pivotally attached by means of a first pivot pin to said third bracket; said first elongate member is also pivotally attached by means of a second pivot pin to said fourth bracket; said third elongate member is pivotally attached by means of a third pivot pin to said third bracket; said second and third elongate members each have a slot both of which engage a fourth pivot pin associated with said fourth bracket; wherein the fourth pivot pin is essentially a threaded bolt with which a manually operable nut adjustably co-operates in order to releasably clamp the second and third elongate members and the fourth bracket; the arrangement being such that, in use, the third and fourth brackets are connected to a supporting surface and a keyboard respectively, and the elongate members may move, when the nut is released, substantially in the same plane between limits determined by the lengths of the two slots. 6. A keyboard support apparatus as claimed in Claim 5 in which a first spring interconnects said third elongate member and said fourth bracket such that the first spring comes under greater tension when the fourth bracket is moved downwards with respect to the third bracket. 7. A keyboard support apparatus as claimed in Claim 5 or Claim 6 in which a second spring interconnects an overhang of the third bracket and a third elongate member such that the second spring comes under greater tension when the fourth bracket is moved downward with respect to the third bracket. 8. A keyboard support apparatus substantially as herein described with reference to the accompanying drawings.

Inventors: COTTERILL MICHAEL JOHN, COTTERILL, MICHAEL, JOHN
Applicants: COTTERILL MICHAEL J, COTTERILL, MICHAEL, JOHN
Application year: 1987
Main classification: A47B21
IPC codes: A47B21