ES2283980T3 - SUPPORT ELEMENT FOR A PRESENTATION DEVICE. - Google Patents

Abstract

An element (4) for supporting a presentation device, for example in the form of an image screen (2), in which a work surface (3) is connected to the support element (4), and in which the support element (4) and the work surface (3) are both vertically and transversely movable and are rotatably arranged, characterized in that the rotating movement of the work surface (3) is forcedly coupled to the rotational movement of the element of support (4) to simultaneously achieve a change in the angle of the support element (4) with respect to a platform (5), on the one hand, and a change in the angle of the work surface with respect to the platform (5) , on the other hand, in response to the influence exerted by a maneuvering device (6).

Description

Support element for a device presentation.

Technical field

The present invention relates to the field of ergonomics in a workplace, for example with respect to computerized work and in particular as related to image projection work.

Background of the invention

The use of workstations for work in computerized terminal varies from simple routines to medicinal use more complicated.

The diagnostic test of the images of patients obtained by X-ray investigations, formation of magnetic resonance imaging, and investigations by ultrasound needed significant concentration and is more or less stressful, depending on the prevailing circumstances regarding the light functions and also the voltage Ergonomic to which the observer is subjected.

The examination of analog images in the called luminous showcases is adapted for a posture of work sitting or standing, but, seen together, is plagued with severe ergonomic deficiencies regarding visual ergonomics and Ergonomics that affects the observer.

However, the digital imaging exam in computerized workstations grants many benefits technical and ergonomic that facilitate the management processes of image, analysis and diagnosis compared to techniques analog Unfortunately, the rest of the team, the so-called terminal workstations, are not adapted to suit to the desired conditions and needs of vision ergonomics and ergonomics that affect the observer.

It is generally known that a change in posture of work will relieve the load on the spine and on the limbs of the affected person, in addition to providing break. For example, the transition from a straight sitting posture to a sitting posture tilted backward results in a significant change in the position of that person and also in its positional relationship with the presentation device of image. With respect to a straight sitting posture, the head of the observer should be slightly inclined forward and with the eyes directed downwards, to facilitate the function of the lachrymal ducts of the eyes, among other things. The transition to a sitting work posture tilted backwards makes it difficult get to see the presentation screen, because the screen is too far, at the wrong angle and does not allow focus perpendicular, and because the observer is too low and You need to bend your head forward. This is particularly problematic for users who wear progressive lenses, whose optical properties mean that the lower field of view is adapted to a focal length that deviates from the screen of presentation of images. This inconvenience constitutes a serious disadvantage with respect to ergonomics of vision and fatigue, partially as a result of the wrong work posture, which sooner or later will result in injuries induced by tension.

It is not practical to adjust each screen of presentation of images when the work posture is changed, both from an ergonomic aspect and from a consumption aspect of time.

The need to adjust the angle of the equipment to variable limits to adjust to differences in structure body of individual users is also in a standing work posture. A typical example in this aspect is found in old desks, which in practical use they turned out to have a tabletop at an angle to the vertical plane to a greater or lesser extent.

The US Patent specification United 5,339,750 shows an adjustable worktable that includes two work surfaces that can be raised and lowered individually where the angular position of each surface of Work can also be adjusted individually. It is also described in this patent specification that a suitable field of use is the use of the computer, where a work surface is used to  support the computer screen and a work surface is used to support the keyboard, etc.

The available workstations, by example workstations that work according to the principle described in the specification of the patent described previously, they are generally equipped for motorized adjustment vertical height for a limited adaptation of the position of the tabletop and image presentation screens Regarding different users.

The ergonomic deficiencies of the stations Computerized work can be summarized as follows: the distance of the user's eyes from the screen in question varies considerably both horizontally and vertically in the transition between a straight sitting position and a position tilted back, and also in combination with a posture of foot job. The tabletop cannot be adapted with Regarding a standing posture. In addition, the maneuver of different tabletops to get those adjustments not It can be done quickly and easily.

Object of the invention

The invention eliminates the drawbacks mentioned above minimizing deviations in the distance from the user's eyes to the presentation screen of images both horizontally and vertically in a transition between a straight sitting posture and a tilted posture behind.

In addition, a work posture is achieved continuous optimized in relation to the presentation device and the work surface despite changes between a posture sitting straight and a posture tilted back by only a single maneuvering device, allowing this way to quickly and easily adjust the vertical position and the inclination of a presentation device and a surface of job.

The maneuvering device also allows modify the angle of the tabletop in the horizontal plane to adapt a standing work posture without altering the distance from the user's eyes from the presentation screen in question.

Summary of the invention

These objects are satisfied hereby invention as defined in the independent claim attached. Suitable embodiments of the invention will result evident from the dependent claims.

As illustrated in the following embodiment Exemplary of the invention, the invention relates to an element of support in a workstation with image display, including motorized multifunctional coordinated movement or compensated mechanical tabletop and screen presentation of images regarding the different positions of User sitting and standing work. A workstation with Image display that includes coordinated movement multifunctional motorized or surface compensated mechanical User work and display support device image regarding the different postures of sitting work and of User foot is effective to optimize eye distance and user position on a presentation screen of images. Several presentation screens of Image simultaneously.

The relationship between the work surface of the user and support element of the image screen can mechanically controlled, adapting the design of the support device to a desired change in relative position between said surface and said support element, for example providing the platform with a guide groove as in the case of the exemplary embodiment illustrated. The relationship between the surface of the user's work and the support element of the screen image can be controlled mechanically, being able to adapt the design of said support element to a desired change in the position between said surface and said support element, replacing the appropriate parts of the element or providing said element adjustable functions.

The invention also provides a limitation. and adaptation of said multifunctional movement with respect to a standing work posture. A limitation is also provided. automatic multifunctional coordinated movement, whose limitation is activated by vertical movement in height by above a maximum height with respect to a work posture sitting, so as not to alter the distance between the user's eyes and the image screen when the work surface forms a Angle with the user in a standing posture.

The multifunctional movement is coordinated with the movement of the subject of the invention in a vertical direction, to maintain a constant distance between the shortest distance from the tabletop to the floor surface. It is provided a coordinated function between the formation of an angle of the work surface in the horizontal plane, caused by said multifunctional movement, with movement in that direction vertical, to maintain a constant distance between the distance shorter from the work surface to the surface of the ground.

A tabletop is also included horizontal that maintains its position in the case of a change in the angle and height of the mobile desk shelf and the shelf of The image screen. It also includes a work surface horizontal that maintains its position in the case of a change in the angle and height of the mobile surface of the table and the element To support the image display unit.

It also falls within the scope of the invention. connect the means to achieve said angular and height in the seat in which the user sits, so that the user can react immediately to change their position sitting, changing the angle of the back of the chair and / or changing the height position of the chair seat.

Brief description of the drawings

The invention will now be described in more detail. with reference to an exemplary embodiment thereof and also with reference to the attached drawings, in which

Figure 1 illustrates an embodiment of the invention intended for a straight sitting posture, and shows significant units and distances;

       \ newpage
    

Figure 2 illustrates the embodiment in a angularly modified position for an inclined sitting posture backward;

Figure 3 illustrates an embodiment in a position for a standing work posture;

Figure 4 illustrates an embodiment in a angularly modified position for a work posture of foot; Y

Figure 5 illustrates the function of the guide groove with respect to the relative movement of the tabletop and the image display screen, where reference 5a indicates an unmodified position between the work surface and the screen and where reference 5b indicates a first position angularly modified, while reference 5c indicates a Second angularly modified position. The illustrations 4-7 in Figure 5d show four possible guide groove designs for four different patterns of the movement between the angular positions of the tabletop and the screen.

Description of the invention

Exemplary embodiments of the invention illustrated in Figure 1 include a presentation device in the form of a display screen 2 in relation to a work surface in the form of a tabletop 3. The screen is mounted so that it can be released on a device support in the form of a screen plate 4. All these units can move vertically at the same time, thanks to  which are fixedly mounted on a platform 5 which, in its instead, it is mounted on a leg element 13 that can extend vertically, for example a telescopic element.

To allow screen 2 and dashboard table 3 be placed as desired and as necessary with respect to the eyes of the user, with the reference number 1 in the figure, and different postures of the user's body, platform 5 is provided with a guide groove 7 in which a bearing of the platform S is intended to move through one end of a maneuvering device 6. Maneuvering device 6 can have the shape of a pneumatic spring or an adjustment device motorized whose other end is mounted on platform 5, directly or indirectly. In the case of the illustrated embodiment, the bearing is placed on the highest part 13A of the leg element 13. The tabletop 3 is attached to an angle frame adjustable or swivel 8 that mounts on platform 5 in a 8A frame bearing. One end of a connecting arm 9 located forward is mounted on the swivel frame 8, while the other end of said arm is mounted on one arm of connection 11 on which the screen plate 4 is firmly mounted. One end of the connecting arm 10 located rearward is mounted on a movable bearing of frame S while the other end of said arm 10 is also mounted on the connecting arm eleven.

This construction of a connection mechanism 8, 9, 10, 11 allows to vary the movements and degrees of freedom of the screen and tabletop to an extent greater than the real need, appropriately sizing the units composed of the maneuvering device 6, the guide groove 7, the swivel frame 8, the connecting arm 9 located towards forward, the connecting arm 10 located back and the distance between the bearings in the connecting frame 11, with regarding size and placement.

The guide groove 7 is provided on the fixed platform 5, which is not forming an angle. The device of maneuver 6 and the connecting arm 10 located backwards held in the guide groove 7. The swivel frame 8 constitutes a fourth connection between a connecting bearing 81 located to the rear and a connecting bearing 82 located forward. This results in a four-connection mechanism, which is adapts to the movement through the maneuvering device 6, while that the mechanism as a whole - which is supported by the four connections - also rotates around the bearing of the frame 8A.

The following distances or spacing have been shown in Figure 1 with the intention of further illustrating the geometries involved: a distance perpendicular to the screen of image aX1, a horizontal distance to the image screen bX1 and the horizontal height of table bY1, the screen height of image cY1 and the user's eye height aY1, all with respect to a floor surface 12. The angle defined by the screen image and the table surface bears the reference α1.

Figure 2 shows an angular position modified, which corresponds to a work posture inclined towards  behind. As will be seen in Figure 2, the connecting arm 9 located forward and connecting arm 10 located backwards form a flexible parallelogram so that the arm Forward connection 9 will be controlled by the arm of backward connection 10. The region in which the device maneuver 6 moves and its stroke length, coupled with the length and design of guide groove 7 and lengths 9L and 10L of the respective connecting arms and their length relationships mutual control regions of coordinated board movement from table 3 and image screen 2.

In this case, the geometries have been changed. reducing the height of the user's eyes 1 to aY2, which corresponds to cY1, and the front edge of the table surface has been lowered to bY2. The perpendicular distance to the screen aX1 and the horizontal distance to the screen bX1 and the angle of the screen to the table surface α1 = α2 are, however, constants

Figure 3 illustrates the element adapted for a standing work posture, where the geometries with respect to the distance perpendicular to the screen aX1 and the distance horizontal to the screen bX1 are equal to those shown in the Figure 1, although the distance from the horizontal table surface bY3, and screen height cY3 and the eye height of the user aY3 from the ground surface of course have increased. The angle defined by the image screen with the table surface is constant, i.e. \ alpha3 = \ alpha1 = α2.

However, according to Figure 4, a increase in the angle of the tabletop 3 and the display plate  4 of equal magnitude is particularly beneficial, or indeed necessary, in the case of a standing work posture, where eyes of the user 1 with respect to the screen 2 in the case of training from a desk-type angle of tabletop 3 does not change when a transition is made between a straight sitting posture and a posture tilted back. Therefore it is appropriate restrict the formation of the tabletop angle 3 to the synchronized region of the display plate 4 above the maximum height of said tabletop 3 intended for a sitting job posture. This limitation can be activated, by example, by the unit responsible for vertical movement in height 13 in the transition between a sitting work posture and toenail. The geometries related to distance perpendicular to the aX1 screen and the horizontal distance to the bX1 screen and the horizontal plane angled screen are still constants, ie? 3 =? 1 =? 2. Without However, the tabletop is given an angle? 4 with respect to the horizontal plane, since the bearing of the platform S has moved along a piece that forms a groove angle of guide 7, only by means of maneuvering device 6. bY3 (Fig. 3) has been reduced by bY4, while cY3 and aY3 They remain constant.

As will be apparent from Figure 5, the movement pattern of tabletop 3 and the screen of Image 2 can be varied without practical limitations to the geometry of construction and measurement, giving the guide groove 7 the shape and size illustrated in Figures 5d4, 5d5, 5d6 and 5d7. When necessary, this flexibility can be used by replacing platform 5, or parts thereof, with another desirable guide groove, or allowing adjust the shape and length of the guide groove (not shown).

The guide groove design shown in the Figure 5d4 is identical to the design of the guide groove shown in Figures 5a, 5b and 5c. The synchronized angle formation of tabletop and image screen can be increased increasing the inclined part that forms the radius of the guide groove according to Figure 5d5. The guide groove design 7 of according to Figure 5d6, that is in the absence of movement radio controlled and synchronization, provides an increase comparatively slow screen angle formation of image regarding the tabletop while designing according to Figure 5d7 provides a faster increase in the angular difference

The distance between the front of the board of the table and the floor surface 12 can be kept constant, synchronizing the vertical movement away from the surface of the floor 12 with the unit responsible for said vertical movement in height 13A, in parallel with the formation of the board angle of the table 3.

The angle defined by the tabletop 3 with screen plate 4 it can be increased, for example synchronize, forming the guide groove 7 as a radius with its origin of coordinates in the rotational center 8A of the frame swivel 8, see Figure 5d5. This part of the guide groove, of otherwise, it can be straight, see Figure 5d4, instead of form a radius, depending on the measurement conditions mutual.

Claims (12)

1. An element (4) for supporting a presentation device, for example in the form of an image screen (2), in which a work surface (3) is connected to the support element (4), and in the that the support element (4) and the work surface (3) are both vertically and transversely movable and are rotatably arranged, characterized in that the rotating movement of the work surface (3) is forcedly coupled to the rotary movement of the support element (4) to simultaneously achieve a change in the angle of the support element (4) with respect to a platform (5), on the one hand, and a change in the angle of the work surface with respect to the platform ( 5), on the other hand, in response to the influence exerted by a maneuvering device (6). 2. An element according to claim 1, characterized in that the forced or controlled angular movement is controlled by a connection mechanism (8, 9, 10, 11). An element according to claim 2, characterized in that the connection mechanism includes a frame (8) that can rotate around a bearing (8A) in the platform (5), a connection arm (9) located forward , a connecting arm (10) located rearward and a connecting arm (11), in which the connecting arm located rearward is connected to the rotating frame (8) by means of a connecting bearing (81) located rearward, and wherein the connecting arm (9) located forward is connected to the rotating frame (8) by means of a connecting bearing (82) located forward. An element according to claim 3, characterized in that one end of the connecting arm (10) located backwards is provided with a platform bearing (S), which can move in a guide groove (7) in the platform (5). An element according to claim 4, characterized in that the maneuvering device (6) is adapted to cause the displacement of the platform bearing (S) in the guide groove (7). An element according to claim 5, characterized in that the maneuvering device (6) is in the form of a pneumatic piston cylinder device, which is connected at one end to the platform bearing (S) and at the other end to the platform (5). An element according to claims 1-6, characterized in that the support element (4), the work surface (3), the maneuvering device (6) and the platform (5) are mounted on an upper part (13A) of a leg support (13) that can extend vertically, for example a telescopic device that is operated by an additional maneuvering device. An element according to any one of claims 4-7, characterized in that at least a part of the guide groove (7) is rectilinear. An element according to claim 8, characterized in that the guide groove (7) extends in a horizontal direction or defines an angle with the horizontal plane. An element according to any one of claims 8-9, characterized in that the guide groove (7) also includes a part that forms an angle with respect to said rectilinear part. An element according to claims 8-10, characterized in that the part that forms an angle with the guide groove (7) is rectilinear or includes part of the arc of a circle with its radius in the bearing (8A) of the frame swivel (8). An element according to any one of claims 1-11, characterized in that the maneuvering device (6) is controlled by the vertical and / or angular movements of the seat and / or the back of a chair.