AT12119U1 - MOBILE MANUAL STEP-UP HEIGHT ADJUSTABLE PRESENTATION DEVICE - Google Patents

Description

Austrian Patent Office AT12 119U1 2011-11-15

Description: The invention relates to a mobile, manually height-adjustable presentation device with a frame and a data input and / or output device, in particular an interactive board, according to the preamble of independent claim 1.

For presentation and training purposes, especially in schools boards, flip charts, monitors, projection screens, PCs, computers, etc. are used.

Conventional wall-fixed blackboards, which are described with chalk or the like, are infinitely adjustable in height, so that an adaptation to the user with regard to their size and distance to the panel can be done. This height adjustment of the prior art blackboards is effected via a pulley system which, by means of a very heavy balance weight, holds the panel in a set height until the user shifts the panel to a different height. Disadvantage is that the balance weight is very difficult and therefore not suitable for use as a freely movable panel with rollers attached to the bottom.

Flipcharts, monitors, projection screens, PCs and computers can be accommodated on a frame which is height adjustable and movable by means of rollers. Thus, a simple and quick adjustment of the position of the rack on which the data input and / or output device is located can be made relative to the users. Disadvantage is that the height adjustment of the data input and / or output device on the floor frame is usually done over heavy balance weights or spindle drives with electric motor.

A better height adjustment of a PC discloses the DE 19754020 A1 via a gas-pressure spring, which operates on a scissor lift. However, the disadvantage is the high center of gravity of the gas spring, as well as the entire construction, which requires a relatively high weight in order to ensure a stable and secure position during operation.

DE 19508393 A1 discloses a flipchart, which also has a gas spring (alternatively counterweight with cable), which holds a panel height-adjustable on a single vertical center column, which is mounted mobile on two rod-shaped feet, each with two end rollers. Disadvantage here is the very high center of gravity, as well as a lateral lability because of only one column of the center, the entire flipchart has a high total weight because of the counterweight.

A similar construction of a flipchart disclosed in DE 29514533 U1, but with a second panel on the back of the flipchart as a counterweight to the first panel on the front of the flipchart, said panels recorded on a frame in the manner of a step ladder in guides added are, with two oblique hinged together ladder parts, each having two mutually parallel lateral vertical beams, and in between these connecting cross struts. It applies the same disadvantage, as already in the aforementioned DE 19508393 A1, with high weight and high center of gravity, but here is higher because of the sheet-shaped second panel as a balance weight and the double lead frame, however, improves the lateral stability.

A lower center of gravity offers the PC work table DE 29518946 U1, with X-shaped cross-leg pairs on both sides of the table surface, the upper ends of the legs form the support for the table top and provided the lower ends with rollers or sliders are, to the mobile pad on the floor. Between the pairs of legs and at the level of the joints of these pairs of legs is a cross member, which carries a torsion spring, which supports the height adjustment, but only after a cumbersome release of a catch. This PC work table is therefore not suitable for a quick and constantly changing height adjustment. Disadvantage is the still relatively high center of gravity and the associated high weight of the overall construction. In addition, the PC is not attachable to the table surface, so there is a security risk, in terms of damage to the PC and / or injury to a person. A helical spring on a table is also disclosed in DE 29600597 U1, in support of the height adjustment operated via an electric motor and spindle, when the table is moved upwards. The one end of the coil spring is here in a connecting the two table legs traverse, which receives the transmission shaft of the electric motor, rotatably attached, while the other end is connected to the transmission shaft of the electric motor. Again, the overall weight is large and the focus is high, and an attachment of the items on the table are not mentioned.

The object of the present invention is therefore to develop a mobile and manually infinitely height adjustable presentation device with frame and data input and / or output device, starting from DE 29514533 U1, to the effect that this just as easy, fast in a wide height adjustment Size, number and relative position of different users can be adjusted, but a lower total weight, but still has high stamina.

To solve these objects, the features of independent claim 1 are used.

Further advantageous embodiments of the invention will become apparent from the dependent claims.

It is essential that is in / on / on the ground-level horizontal strut of energy storage in the form of a torsion spring, one end of which is fixed to the frame and the other end is rotatably connected to a pulley of the pulley system on which the rope up and unwindable, which is connected via the deflection roller with the data input and / or output device.

The data input and / or output device is preferably an interactive board with data input, data processing and data output unit, but may also be a conventional PC or monitor (also touch-screen) or keyboard. Also, a conventional blackboard or flip chart or conventional advertising poster of the prior art could be incorporated in the height adjustable rack of the present invention. For reasons of simplification, in the following, only a "board" will be used. Referenced, but all features are also applicable to the other applications mentioned above.

Thus, the advantage is achieved that the entire presentation device according to the invention with frame and board is very easy, e.g. only about 60 kg, and also in the completely upwardly driven state of the board very stable, because the focus of the presentation device is very low, despite very large height adjustment range of about 50-100 cm with an image size of typically 136 cm wide by 102 cm height of the board.

The height adjustment of the board by means of a pulley mechanism and a torsion spring with numerous turns as a counterforce that counteracts the gravity of the board and this holds in the once set height until it is changed by the user by hand.

According to the invention, this torsion spring is arranged in the lower region of the frame, and there, especially in the horizontal tube of the tube protected against damage. This torsion spring has so many turns that about the entire width of the frame and thus the board is needed, with almost turn is on winding and the winding diameter is in the range of 10-30 mm. One end of the torsion spring is received in a pulley for the tether of the pulley mechanism co-rotating, the other end of the torsion spring is fixed to the frame in the opposite pulley, but of course does not rotate. The torsion spring is designed so that the board is in the middle between maximum and minimum height and there is no spring force of the torsion spring acts. Now, the board is manually brought up or down from the springless center position by manual force of a user, this is done against the force of the torsion spring, the off-center position is then automatically held without manual force of a user, because of the friction in the leadership of the board in Frame. [0018] The wheels or wheels of the frame, which are freely rotatable in particular about 360 ° to the vertical axis, are mounted on the underside of preferably two rod-shaped feet on the outer sides of the board, the feet around a vertical axis are pivotally hinged to the frame. Here, the feet can be rotated from a Nutz- into a stowed position and lock at least in the use position. In Nutzstellung the longitudinal extent of the rod-shaped feet perpendicular to the plane of the board and perpendicular to the height adjustment direction. In the stowed position, the longitudinal extent of the rod-shaped feet extends at an angle of approximately 45 ° or smaller to the plane of the board and perpendicular to its height adjustment direction.

The locking or latching between the feet and the rest of the frame via a Raststift- / scenes guide, the backdrop defines the desired angle of rotation of the feet and attached to at least one of the feet, whereas the engaging in the backdrop detent Locking pin is connected via its holder to the frame.

Is unlocked the locking pin from the backdrop not directly by hand, but by means of nail, which is located on the underside of the board or its guide part. We therefore pulled in the use position the height-adjustable board down, hits in the lowest position of the nail with his head on the locking pin and presses on further down the board pull the locking pin completely down out of its sliding engagement, so that the catch lifted it is. The larger diameter nail head passes down this out of the scenery out, with only the smaller diameter nail shaft is located in the backdrop and causes a rotation between the foot and frame when turning the foot. Depending on the length of the gate, which is part-circular and slightly larger in width than the nail shaft, the foot may be pivoted horizontally relative to the frame over a predefined angular range (e.g., 30 °, 45 °, 60 °, 90 °). By the nail head, which has a larger diameter, such as the width of the backdrop, the board is held in its lowest position, thus achieving a lowest possible center of gravity of the entire frame, so that a high stability and security against falling is achieved, even if the Feet are twisted sideways at an angle and no longer form an optimal support for the frame. A twisting of the feet is therefore only possible for safety reasons, when the board is in its lowest position and thus the center of gravity is lowered to a lower level.

By slightly pushing up the board in the stowed position of the nail head can engage in a further development of the invention in a recess arranged at the bottom of the recess and stay there due to the force of the torsion, so that a rotation of the feet is locked and only by slight push down the board against the force of the torsion spring to be unlocked. However, such a locking of the feet in the stowed position can also be omitted.

In particular, from the frame forward and / or laterally spread feet on which there are rollers or wheels or sliders end, from the rest of the frame without tools easily detachable and reapplicable, so that so a packaging at the manufacturer or a move also can be done easily and quickly.

Another measure to reduce the external dimensions and the center of gravity of the board in the stowed position or during transport, is the possibility of folding the projection mirror in the outer contours of the board housing. As a result, the depth can be reduced from about 650 mm to 450 mm or even 400 mm.

Of course, all features of the aforementioned features can be combined with each other as desired, so that e.g. an interactive board via a pulley mechanism and torsion spring is designed to be manually adjustable in height relative to the frame, and the rollable feet of the frame are swiveled in the direction of the plane of the board, and the projection mirror of the board is formed foldable in the housing.

In the following the invention will be explained in more detail with reference to drawings showing only one embodiment. In this connection, further features and advantages of the invention emerge from the drawings and their description.

[0038] [0037] [0038] [0038] [0038] [0038] [0038] [0038] [0038]

It shows:

Fig. 1: Perspective view of the frame according to the invention in use position with interactive board in a raised position.

Fig.2: The frame of Fig. 1 in use position with interactive board in a abge lowered position.

Fig.3: The frame of Fig. 1 and 2 in stowed position with the interactive board in its lowest position and laterally wasting feet.

Figure 4: Perspective view of the frame according to the invention of FIG. 1 in line representation seen from the rear side.

Fig.5: Enlarged detail of the foot of Figure 4 with torsion spring.

Fig.6: greatly enlarged detail of the foot of Figure 4 with torsion bar and

Representation of the pulley area.

FIG. 7: greatly enlarged detail of the foot region of FIG. 4 seen from the front side, with torsion bar and representation of the locking region between foot and frame.

8 shows a view of the frame removed foot without wheels with coolies se.

Fig.9: Enlarged detail of the backdrop of Figure 8 from above.

Fig. 10: Enlarged detail of the backdrop of Figure 8 from below.

Fig. 11: greatly enlarged view of the locking button with attachment to the frame.

Fig. 12: greatly enlarged view of the engagement of the locking knob of Figure 11 in the backdrop of Figure 9 and 10, in the use position of the frame.

FIGS. 1 to 3 show 3D views (solid models) of the frame 1 according to the invention with an interactive board 2 guided vertically adjustable thereon, FIGS. 1 and 2 being upper use positions, and FIG. 3 being a lower stowage position.

In Fig. 1, the board 2 is shown in a pushed up from the center position position, in Figure 2, the board 2 is shown in a pushed from the center position down position.

In Figure 3, the board 2 is shown in a lowermost position and the two laterally hinged to the frame 3 of the frame 1 feet 4 are rotated laterally outwards by 45 °.

The frame 3 consists of three U-shaped attached square tubes, namely two lateral vertical tubes 5 and a lower horizontal tube 6. At the lower horizontal tube 6, a sleeve 7a is mounted, which is inserted into a complementary sleeve 7b of the foot 4, wherein the two nested sleeves represent the articulation 7, for pivoting the foot 4 in pivoting directions 8 (here by about 45 °). Within the lower horizontal tube 6 is protected the torsion spring. 9

At the ends of the two feet 4 are rotatably mounted on the bottom about the vertical axis rotatable rollers 11, so that the entire frame 1 can be moved arbitrarily, both in the use state of Figures 1 and 2, and in the congested state of FIG At least one of the rollers 11 may be lockable by a conventional brake 11a.

At the two lateral vertical tubes 5 each have a linear guide 12, in particular roller bearing guide, available for height-adjustable recording of the interactive boards. 2

In Figures 4-6 of the cable drive for the board 2 is shown in more detail. The board 2 is 4/13 Austrian Patent Office AT12 119U1 2011-11-15 guided over the linear guides 12 on the vertical tubes 5 adjustable in height adjustment 13, wherein the board 2 is connected to the torsion spring 9 via a known pulley mechanism, which ever Rope 14, a pulley 15 for winding and unwinding of the cable 14, and a guide roller 10 on both sides of the board 2 includes. Of course, there may be only one pulley mechanism on one side of the board.

Fig. 5 shows a fixed end 16 of the torsion spring 9, which is connected to the frame 3, and a rotating end 17 of the torsion spring 9, which rotates with its associated pulley 14, whereby the torsion spring 9 is tensioned when the Board 2 is moved by the user from its height center position up or down.

8-10 show the first part of the two-part lock between the frame 3 and the feet 4, namely the part-circular link 18, at the ends of which are bores 19, 20 whose diameter is greater than the width of Gate 18. The gate 18 is fixedly connected to the foot 4 and rotates with this, when the foot 4 is rotated outwards to the stowed position of Figure 3. In this example, the link 18 is inserted in an angled plate, which is mounted in the region of the joint 7b of the foot 4.

Fig. 11 shows the second part of the two-part lock between the frame 3 and the feet 4, namely the locking knob 21 which is fixedly connected via its socket 22 and its holder 23 with the lower horizontal tube 6 of the frame 3.

The first bore 19 at the end of the link 18 is provided for engagement of the lock button 21 in the position of use of Figures 1 and 2, whereas the second, here e.g. 45 ° angular offset hole 20 is provided for engaging a nail head 25 of a nail 24 in the stowed position, which is located on the underside of the board 2 or its height in moving linear guide 12 (see Figure 4).

Fig. 12 finally shows an enlarged section of the lock in use position with locking button 21 which dips into the front hole 19 of the link 18 detent.

If now the frame 1 according to the invention with the interactive board 2 of the use position according to Figures 1 and 2, are moved to the stowed position of Figure 3, then only the board 2 in height down in the height direction 13 must be pulled until to the lowermost position in which the nail 24 engages with its head 25 in the bore of the groove of the link 18 and there pushes the locking button 21 down out of engagement. Then, the foot 4 can be turned laterally outwards (here by 45 °), under the leadership of the nail shank 26 in the slot 18 until the nail head 25 engages in the rear hole 20 of the link 18. The procedure is reversed analogously when the frame 1 according to the invention with the interactive board 2 is to be brought from the stowage position according to FIG. 3 into the use position according to FIGS. 1 and 2. To unlatch the nail head 25 from the rear hole 20, the board 2 is pulled slightly downward, against the force of the spring. 9

In the figures, two pulley mechanisms for the height adjustment of the board 2 are present, but a single would also suffice. Also, two feet 4 are shown, with only a single foot or feet, for example, three or four feet could be arranged, depending on the shape and size of the foot and the width and weight of the board 2. It is not imperatively necessary to arrange the feet 4 in the use position 90 ° to the level of the board 2, but it could already in the use position an oblique angle of eg 60 ° or 45 ° between at least the outer feet 4 and the plane of the board 2 exist. The pivoting of the feet 4 would then just be done by 15 ° or could be completely eliminated.

Furthermore, it can be seen from the figures that the feet 4 are rod-shaped and have two opposing vertical bends of about 60 ° in order to attach the rollers 11 in the higher parts of the feet 4, but at the same time most weight and to shift the center of gravity of the feet 4 further towards the ground. In other embodiments, these bends can also be omitted. 5.13

Claims (21)

Austrian Patent Office AT12119U1 2011-11-15 FIGURINE 1. Rack 2. Interactive board 3rd frame 4. foot 5. lateral vertical struts or tubes 6. lower ground level horizontal strut or tube 7. joint, 7a to 3; 7b to 4 8. Pivoting movements 9. torsion spring 10. pulley 11. rollers, 11a roller brake 12. Linear guide 13. Adjustment directions in height 14. Rope 15. Pulley 16. Fixed end of 9 17. Rotating end of 9 18th scenery 19th hole at one end of 18 20. Bore at the other end of 18 21. Lock button 22nd version of 17 23. Holder of 18 24. Nail 25th nail head 26. Nagelschaft Anspruch 1. Mobile manually stepless height adjustable presentation device comprising a frame (1) with frame (3) and foot (4) with rollers or sliders (11), wherein the frame (3) at least two spaced-apart lateral vertical struts ( 5) and at least one of these connecting horizontal strut (6), and the presentation device further includes a relative to the frame (1) in longitudinal guides (12) guided and infinitely height adjustable data input and / output device (2), in particular interactive board, which held by means of energy storage (9) and pulley system with rope (14) and guide roller (10) in its adjusted height position, characterized in that in or on or on the ground-level horizontal strut (6) of the energy storage (9) in the form of a Torsion spring is located, one end of which is fixed to the frame and the other end connected to a pulley (15) of the pulley system co-rotatable is, on which the cable (14) is wound up and unwound, which is connected via the deflection roller (10) with the data input and / or output device (2). 2. Presentation device according to claim 1, characterized in that the frame (3) is U-shaped, with two spaced-apart lateral vertical struts (5) and a single connecting this bottom-near horizontal strut (6). 3. Presentation device according to claim 1 or 2, characterized in that the data input and / or output device (2) is located substantially between the two vertical struts (5) and substantially above the ground-level horizontal strut (6). 4. Presentation device according to one of claims 1 to 3, characterized in that the vertical struts (5) and / or the horizontal struts (6) made of lightweight metal or plastic tube, in particular square tube, or of lightweight U or L-metal or Plastic profile bars are made. 5. Presentation device according to one of claims 1 to 4, characterized in that a respective rod-shaped foot (4) with rollers / sliders (11) below the two vertical struts (5) is provided, at a height in or below the ground-level horizontal strut (6), each of the feet (4) having approximately a length approximately equal to the spacing of the two vertical struts (5), and each of the feet (4) being forward and backward by approximately the same amount from the plane of the data - And / or -ausgabevorrichtung (2) protrudes. 6. Presentation device according to claim 5, characterized in that the feet (4) with the rollers or sliders (11) are pivotable from a utilization position into a storage and transport position and are preferably designed to be removable. 7. Presentation device according to claim 6, characterized in that the utilization position of the feet (4) in the angular range of 90 ° to 45 ° and the storage and transport position in the angular range of 45 ° to 0 °, defined between the level of data input and / or -ausgabevorrichtung (2) and the plane of the longitudinal extent of the rod-shaped feet (4). 8. Presentation device according to claim 6 or 7, characterized in that a locking or latching between the feet (4) and the frame (3) via a latch pin / link guide (18, 21). 9. Presentation device according to claim 8, characterized in that the link (18) defines the desired angle of rotation (8) of the feet (4) and at least one of the feet (4) is mounted, whereas in the gate (18) engagingly engaging Locking pin or locking button (21) via its holder (22, 23) is connected to the frame (3). 10. Presentation device according to claim 8 or 9, characterized in that the unlocking of the feet (4) to the frame (3) via a nail (24), which is located on the underside of the data input and / or output device (2) or whose guide (12) is located and which, after shutting down the data input and / or output device (2) presses the detent pin or locking button (21) out of the link (18). 11. Presentation device according to one of claims 1 to 10, characterized in that the data input and / or output device (2) is an interactive board (2), with an image size of about 136 cm wide by 102 cm in height and height adjustment approx. between 50-100 cm. 12. Presentation device according to claim 11, characterized in that the interactive board (2) includes a projection mirror, which is formed from a utilization position in a storage and transport position in a housing of the interactive board (2) at least partially folded in such a way that the Depth of the board (2) reduced by at least 25%. For this 6 sheets drawings 7/13