A device to create a support for an elbow or a forearm in connection to a surface of a desk The present invention relates to a device to create a support for an elbow or a forearm in connection to a surface of a desk. By using a support for an elbow or a forearm the necessary conditions to decrease a partial load onto the arm, neck, shoulder and the back portions of the person carrying out the terminal work in front of a keyboard and a screen with or without assistance of a mouse. In this position the forearms are substantially kept still and the static load is easily causing damages. EMG (Electro Myo Graf) tests show that if one person rests on the elbows the shoulders are relieved more that 50 % compared to the corresponding work without a support.

The load damages have been steadily increased since 1970 as the office work was transformed from being more varying to sitting still in front of a computor terminal. In Sweden more than 2 million people are regularly workning in front of a terminal. In the way the workning sites are designed there is very little possibilities to vary the position of the body during work, which means an one-sided load. The body is trying to instinctively compensate for this one sided load. From here there is a great risk to develope a more incorrect and compensating workning position.

Such a simple aid as a support for the elbow and forearm, for the one or better for the two arms is of great helt to relieve the body, preferably the shoulders.

Previously supports for the forearms have been suggested in different shapes. Many are complex comprising several composite and coacting parts which not always are easy to handle. Some of these previous supports must be fastened by screws onto a desk.

Neither they are not comfortable for the elbows after a longer time in use. They can be stiff and often the can not be moved in a rapid and simple way. Neither is an adjustment of the level towards the keyboard and the mouse permitted.

DK9500194 U3 and 9600079 U3 are examples of previously known supports for forearms with the drawbacks mentioned above.

The object of the present invention is to easily provide a device to create a support for an elbow and a forearm in connection to a desk surface allowing a deepening of the workning place so it is possible rest onto said support being arranged in connection to the desk.

Furthermore said support for the elbow and the forearm shall be able to be placed outside the"ordinary"desk surface and being easy to move Iaterally, and, if needed be able to be laid onto the desk.

This is achieved by a device having the characteristic clauses mentioned in the claims.

By arranging a plate with a resielient top. a stiff lower side and at least one open yoke protruding from the lower side in front of the boundary edge of the plate and being releasably connected to the lower stiff side of said plate adjoining the edge of the surface of the desk with the stiff lower side facing the desk and with the forward edge of the open yoke bearing on the bottom side of the desk it is possible to rapidly set up a support for an elbow and a forearm in the intended position. This can take place without any fastening device and just by having the support for the elbow and forearm by its own weight will rest upon the desk, and through the yoke towards the bottom side of the desk by the lever action obtained.

This means that a higher pressure onto said support will give a closer grip to the desk. The support for elbow and forearm can very easily be moved according to change in workning position.

According to the present invention it is also possible to create a deeping of the workning place, which means that you can lean against the desk using the support for the elbow and the forearm and yet being able to focus on the screen, i. e. the distance between the screen and the eyes of the observer will be correct.

The invention will now be described in connection to one embodiment shown in the drawings, where : Fig. 1 is a side view of the support for the elbow and the forearm in position at a desk; Fig. 2 is a plan view of a desk with a support for an elbow and a forearm according to the invention in two different positions, and Fig. 3A and 3B are diagrammatic partial perspective views of the invention used in two different positions and including an employee.

In fig. 1 the desk 1 is partially shown with a keyboard 2 and a support 3 for an elbow and a forearm comprising a plate 4 and a . y, oke 5. The yoke 5 is preferably releaseably and/or pivotably attached to the plate 4 to be placed entirely onto the surface of the desk 1 (fig. 3B). A device 6 at the front edge of the yoke 5 will compensate for different thicknesses of the desk, and will allow a change in inclination of the support towards the desk. This device can be in the form of a spacer being pushed onto the tip of the yoke, said spacer perferably being made of rubber and having different setting positions for different thicknesses of the desks and different inclinings of the support for the elbow/forearm. The releasable attachment of the yoke 5 in the plate 4 can be performed by a hooklike shoulder 5a in the yoke and which is being pushed into a recess in the plate. If required this can be combined with a bayonet, i. e. a stud has to be pushed in to have the yoke released from the plate.

In fig. 2 a support for an elbow and a forearm for use in workning with both mouse and keyboard is shown. To the left the workning station is"deepened", i. e. it is possible to lend against the supports 3 still obtaining the correct distance to the screen to be able to focus this. To the right the supports 3'are shown laid onto the desk, i. e. when the yoke portions 5 are taken away or turned away from the bottom sides of the supports. The smaller support at right, i. e. the support for the forearm and the handling of the mouse has a it's own yoke support and is not connected to the wider support at left, i. e. de wider support for the forearm and the elbow has its own yoke support. It is also possible to furnish the wider support with two yokes.

In fig. 3A terminal work with handling of both mouse and keyboard and with the supports in an outer edgeposition is shown, and in fig. 3B a corresponding terminal work with the supports entirely onto the desk is shown. I this later case the keyboard (and the screen) are moved a little further up on the desk, i. e. to a position further away frkn the edge.

The invention is not restricted to the embodiment shown in the figure, but modifications can be done within the scope of the following claims.