DE3808327A1 - Pivot-arm device - Google Patents

Abstract

The pivot-arm device provided for bearing, for example, a projecting screen is mounted on a table by means of a clamping securing means. The pivot arm of the pivot-arm device is freely rotatable about the axis of the pivot bearing, as a result of which there may be a risk of the table tilting up. The novel pivot-arm device is intended reliably to prevent uncontrolled pivot movements. In order to restrict the pivot path of the pivot arm, a first and a second adjustable stop are assigned to the pivot bearing of the pivot arm in order to restrict the pivoting movement and secure against rotation of the carrying arm. When the pivot arm pivots, these stops interact with in each case one counter-stop of the pivot bearing. By virtue of the fact that the pivot arm can be arrested, the pivot angle thereof can be restricted to a non-risk pivot range, with the result that the pivot arm cannot be pivoted beyond the edge of the table. When the table is displaced, the risk of it tilting up as a result of the pivot arm projecting can thus be prevented.

Description

The invention relates to a swivel arm device the preamble of claim 1.

Known swivel arm devices of this type are used a bracket designed as a clamp on a table assembled. They point to a free end of the pan armes a support or support plate on which at for example, a screen is arranged. The pan can arm in this known swivel arm device can be freely rotated around the axis of the swivel bearing. There is a risk that an unfavorable Position of the swivel arm with the overlaid image the table can tilt. This risk of tipping is over for example, especially large if a relative small table with a heavy object on it Support is moved. In addition, the swivel arm swivel uncontrollably and lead to a hazard.

The invention has for its object a swivel Form arm device of this type so that uncontrolled gelled swivel movements of the swivel arm (s) can be reliably prevented.

This task is the swivel arm device Generic type according to the invention with the character nenden features of claim 1 solved.  

As a result of the design according to the invention, the swivel arm locked with the stop in one position or the Swivel path of the swivel arm can be limited. That’s it possible to adjust the swivel angle of the swivel arm limit the safe swivel range. E.g. can this Swivel range can be set so that the swivel arm is not pivoted beyond the edge of the table. Thereby can be safely avoided that the table, in particular if it is moved, by the protruding swivel arm tilts.

Further features of the invention result from the others Claims, the description and the drawings.

The invention is described below with reference to several in the Drawings of exemplary embodiments illustrated described. It shows:

Fig. 1 shows a swing arm with a bracket and a carrier according to the invention, partly in side view and partially in vertical section,

Fig. 2, the swing arm of FIG. 1 in top view,

FIGS. 3 and 4, a second embodiment of a swing arm according to the invention with a differently formed carrier in side view and in plan view,

FIGS. 5 and 6 a part of a further swing arm according to the invention in views corresponding to FIGS. 3 and 4,

Fig. 7 shows a part of a swing arm according to the invention partly in side view and partially in vertical section

Fig. 8 is a pivotal mounting of the swing arm of FIG. 7, in a section along the line VIII-VIII in Fig. 7

FIGS. 9 to 15, the swivel bearing of FIG. 8 device of a pivot arm, the pivot arm in different pivotal positions,

Fig. 16, 17, respectively, a further embodiment of a pivotal arm to the invention OF INVENTION in representations corresponding to FIG. 1.

The pivotal arm construction according to FIGS. 1 and 2, is fixed to a swing arm 1, on whose free end a support 2. He carries, for example, a screen of a writing computer or the like. The swivel arm 1 is clamped to a desk or the like with a holder 3 designed as a clamp. With the swivel arm, a person sitting at the desk can bring the object on the carrier 2 , such as a screen, a telephone or the like, into the swivel position that is most favorable for them by swiveling the swivel arm about its swivel axis.

With the bracket 3 shown only in simplified form, the swivel arm 1 can be clamped on the desk. The swivel arm 1 can be swiveled via a swivel bearing 4 relative to the holder 3 fastened to the desk or the desk. The pivot bearing 4 according to FIGS. 1 and 2 has an outer and inner sleeve 5 and 6 and a bearing pin 7 , on which the inner sleeve is rotatably mounted.

The outer sleeve 5 is closed at the top and bottom by an end plate or disks 8 and 9 . With the cover disc 9 , the pivot bearing 4 is seated in an annular shoulder 10 at the upper end of a further outer sleeve 11 , which in turn is arranged on a lower outer sleeve 12 . It is screwed onto the bracket 3 with screws 13 a , 13 b spaced next to one another on the bracket 3 (cf. also FIG. 7). As shown in Fig. 7 also shows, the outer sleeves 11 and 12 c via further screw 13 screwed together. The outer sleeve 11 is firmly connected by further screws 14 , 15 to the end plate 9 , which in turn is screwed to the journal 7 .

The bearing journal 7 is surrounded at its two end regions by bearing rings 16 , 17 , each of which has a flange 18 , 19 directed outward at right angles at their ends facing away from one another. The bearing rings 16 , 17 rest with their flanges 18 , 19 on the end faces 20 , 21 of the inner sleeve 6 . The flange 19 is also on the lens 9 . The inner and outer sleeves 5 and 6 and with these the pivot arm 1 can be pivoted relative to the bearing pin 7 in the respective pivot position. The inner sleeve 6 is preferably seated in the outer sleeve 5 with a press fit.

The swivel arm 1 consists of two preferably equally long arm parts 1 'and 1 ''. The arm part 1 '' carries at its end facing away from the bearing 4 22 the carrier 2nd It is rotatably mounted on the arm part 1 ^" via a swivel joint 23. The arm parts 1 ′ and 1 ′ ′ are articulated to one another via a double joint 24 with two joint sleeves 25 and 26. Their joint axes A ′, A ′ ′ lie parallel to one another and are connected to one another via connecting brackets 27 , 28. The double joint 24 makes it possible to pivot the arm parts 1 ′ and 1 ′ ′ against one another, so that the screen or the support 2 both about the pivot axis A of the pivot bearing 4 and about the Axes A 'and A ''of the articulated sleeves 25 , 26. The carrier 2 can thus be moved from the illustrated initial position to the swivel bearing 4. As a result of the double joint 24 , the two arm parts 1 ', 1 '' can be moved against each other In addition, the carrier 2 can be rotated about the axis of the swivel joint 23. The carrier 2 can thus be adjusted to almost any position.

As shown in FIGS. 3 and 4, a frame-like support 2 a is provided instead of the plate-shaped carrier 2 according to FIGS. 1 and 2 be the one on the arm parts 1 a ', 1 a' 'on the pivot bearing 4 a is mounted. The carrier 2 a can in turn rotate about the hinge 23 a , but can also be adjusted in inclination via an adjusting device 29 .

These adjustment and pivoting possibilities are also given in the embodiment according to FIGS. 5 and 6, in which a second support 2 b 'is provided in addition to the support 2 b with its swivel 23 b . The carrier 2 b 'can be, for example, a concept holder and / or a lamp. The carrier 2 b 'is connected via the swivel 23 b and a second joint sleeve 31 , two arm parts 33 and 34 forming a second swivel arm and a double joint 24 b and a swivel joint 32 with the arm part 1 b '', the arm parts 1 '' And 1 a '' according to FIGS. 1 to 3 corresponds. The joint sleeve 31 forms a double joint 30 with the swivel 23 b and is provided on the arm part 33 . The hinge sleeve 31 lies between an upper and lower hinge sleeve 31 a and 31 b , between which the hinge sleeve 31 is pivotally mounted about the axis 31 c . The joint sleeves 23 b , 31 a and 31 b are connected to one another via tabs 30 a and 30 b , the carrier 2 b 'being fastened to the upper tab 30 a . The hinge sleeve 31 can also be of the same design as the hinge 23 b forming the hinge sleeve, wherein the support arms 33 and 34 are substantially the same as the arm parts 1 b '' of the first pivot arm 1 b . The arm part 33 is connected via the further double joint 24 b to the arm part 34 , at the free end of the carrier 2 b 'is articulated via the swivel 32 . The double joint 24 b is designed correspondingly to the double joint 24 according to FIGS. 1 and 2. To adjust the inclination of the support 2 b ', an adjusting device 29 b is provided.

Instead of the single joint 32 of the arm part 34 , a double joint (not shown) can also be provided, which corresponds to the double joints 24 and 24 b . In such a double joint, the one joint sleeve with the support 2 b 'and the other joint sleeve with a further (not shown) support or support for, for example, a concept holder, a lamp or the like. Connected so that the support 2 b ' and the support can be pivoted independently of one another.

In the embodiment according to FIGS. 1 and 2, the swivel arm 1 is arranged at a relatively large distance above the holder 3 , since the outer sleeves 11 and 12 lie between it and the swivel bearing 4 . This distance can be increased by arranging 4 further outer sleeves between the holder 3 and the pivot bearing. Accordingly, the distance between the holder 3 and the pivot bearing 4 can be reduced if, for example, only the outer sleeve 11 or the outer sleeve 12 is provided. In the simplest case, the swivel bearing 4 is arranged directly on the holder 3 , so that the swivel arm 1 can be swiveled just above the desk.

In order to limit the pivoting movement of the pivot arm 1 , a stop device is provided approximately half the length of the pivot bearing 4 . It preferably has two stops 35 and 36 which are adjustably arranged in the journal 7 . These stops 35 , 36 are assigned stop surfaces 37 and 38 of the inner sleeve 6 ( FIGS. 8 to 15).

The stop surfaces are formed by radially extending walls of a circumferential groove 44 in the inner wall in the sleeve 6 . The stops 35 and 36 are formed by preferably identical threaded pins which lie in threaded bores 41 , 42 of the bearing pin 7 . The threaded bore 41 , 42 and the stops 35 , 36 lie directly one above the other in planes crossing one another, preferably perpendicularly. The length of the stops 35 , 36 is preferably slightly shorter than the outer diameter of the journal 7 , so that they can both be screwed into a position recessed in the journal ( FIG. 10). In this position, the swivel arm 1 can be swiveled through 360 °, the swivel arm with the outer and inner sleeves 6 and 5 being able to rotate about the bearing journal 7 in both swivel directions P and P '.

However, the stops can also be rotated individually or both in a position protruding above the journal 7 , so that they protrude with one of their ends outwards over the journal (FIGS . 8, 9, 11 to 15). In order to be able to adjust the stops in such a position, the inner sleeve 5 has an insertion opening 43 and the diametrically opposite circumferential groove 44 . The outer sleeve 5 is provided with two plug-in openings 49 , 50 , preferably at right angles to one another, through which an Allen key, screwdriver or the like can be inserted to adjust the stops 35 , 36 . The inside width of the plug opening 43 of the inner sleeve 6 is only slightly larger than the outer diameter of the stop 35 , so that it can be screwed with its one end facing away from the arm part 1 '45 into the plug opening 43 . It then lies against the wall 39 of the plug opening 43 ( FIG. 9). The swivel arm 1 is secured in this position against rotation in both directions of rotation P , P ', so that the swivel arm is locked against the table.

The circumferential groove 44 extends over a circumferential angle of slightly more than 180 °. In the axial direction of the journal 7 , the circumferential groove 44 extends at least over the height of the two threaded bores 41 and 42 ( FIG. 7), so that both stops 35 , 36 can be moved simultaneously into their outwardly projecting stop position ( FIGS. 14, 15 ). For turning in the threaded bores 41 , 42 , each stop 35 , 36 is designed as an Allen screw into which the operator of the swivel arm 1 can insert the Allen key or the like to turn the stops. In order to be able to insert the tool into the respective stop from the outside, the swivel arm 1 is rotated such that the stops 35 , 36 lie in the region of the respective plug-in opening 43 , 49 , 50 . These openings 49 , 50 are aligned in the starting position of the swivel arm 1 according to FIG. 9, in which it can be locked via the stop 35 , with the insertion opening 43 and the circumferential groove 44th

If the swivel arm 1 is to be pivoted out of this starting and locking position, the stop 35 must first be screwed back into the threaded bore 41 . Then the swivel arm 1 with the sleeves 5 , 6 can pivot freely about the bearing pin 7 . In order to limit the swivel path of the swivel arm 1 , either the stop 35 can be screwed in the opposite direction (arrow X ) in FIG. 9 and / or the stop 36 to one side or the other beyond the journal 7 , so that the stops 35 , 36 assume one of the positions shown in FIGS. 11 to 15.

If the stop 35 is screwed in the direction of arrow X into the position shown in FIG. 11, in which it projects into the circumferential groove 44 , the swivel arm 1 - of which only the arm part 1 'is shown in FIGS . 9 to 15 - clockwise and counterclockwise by 90 ° in the direction of arrow P or P 'until the stop 35 with its projecting end 51 comes to rest against the stop surface 37 or 38 of the inner sleeve 6 . The other stop 36 is hidden in the bearing pin 7th

Overall, the swivel arm 1 can be swiveled 180 ° to the right or left from the starting or central position according to FIG. 11.

A further swivel position setting consists in that the stop 35 is screwed back into its starting position according to FIGS. 8 and 10 and then the other stop 36 is rotated outward into the position shown in FIG. 12 via the associated threaded bore 42 . The swivel arm 1 is rotated so that the opening 49 of the outer sleeve 5 is flush with the stop 35 . In this position, the other opening 50 of the outer sleeve 5 is flush with the stop 36 , so that it can be screwed into the position described using an Allen key which is inserted through the opening 50 . Since in this position the opening 50 is located close to the stop surface 38 , the stop 36 is also next to the stop surface 38 after unscrewing ( FIG. 12). From this starting position, the sleeve 5 , 6 can be pivoted with the swivel arm 1 in a direction (arrow P ) counterclockwise by 180 ° until the stop 36 strikes the other stop surface 37 .

The swivel range of the swivel arm 1 can also be limited to the other 180 ° range. For this purpose, the stop 36 is screwed through the opening 50 into the position shown in FIG. 13 in the position of the swivel arm 1 according to FIG. 10. The end 52 of the stop 36 projecting over the bearing pin 7 is then located directly next to the stop surface 37 . The swing arm 1 can from the position of FIG. 13 with the sleeves 5, 6 are pivoted in the direction of arrow P 'by 180 ° until it comes against the stop surface 38 to the plant.

The swivel range of the swivel arm 1 can in this way be limited to 180 ° by simply adjusting the stop 36 , and depending on the position of the stop 36 the swivel range can also be limited to two different 180 ° ranges. In both cases ( Fig. 12 and 13), the other stop 35 is completely sunk in the journal 7 , so it is not effective.

Finally, there is the possibility of adjusting the stops 35 , 36 so that they both tap outwards over the bearing 7 into the circumferential groove 44 (FIGS . 14 and 15).

The swivel angle of the swivel arm 1 is then limited to 90 °, the possible swivel direction depending on which side of the bearing pin 7 the stop 36 protrudes.

To adjust the stop 35 , the sleeves 5 , 6 must be brought into the position shown in FIG. 10 so that the stop 35 can be actuated through the opening 49 . It is then screwed into the circumferential groove 44 . In addition, the other stop 36 is adjusted in the manner described through the opening 50 into the position shown in FIG. 14 or 15. If the stop 36, the position shown in Fig. 14, then the swing arm 6 can 1 with the sleeves 5, in the direction of arrow P in the counterclockwise direction by 90 ° can be pivoted, until the stop surface 37 comes to rest against the stop 35. In contrast, it can be pivoted in the opposite direction (arrow P 'in Fig. 15) by 90 ° when the stop 36 projects in the other direction over the journal 7 .

In the settings described, the swivel arm 1 can of course be swiveled clockwise and counterclockwise between the respective stops.

The stops 35 , 36 can be arranged differently from each other in the embodiment shown, so that they include angles other than 90 °. Possibly. can also be provided further stops designed as threaded pins if additional adjustment options are to be given.

With the adjustment options described, it is possible to limit the swivel range of the swivel arm 1 to the cheapest swivel range in each case or to exclude the swivelability at all ( FIG. 9), for example if the table on which the swivel arm is attached to the screen is moved or adjusted should. In this way, a risk of the table tipping over can be reliably avoided.

1, the swing arm of FIG. 16 differs substantially characterized by the swing arm of FIG., That two axially superimposed pivot arms are provided.

One upper swivel arm 1 c is designed correspondingly to the swivel arm according to FIG. 1. It thus also has two arm parts 1 c 'and 1 c ''which are connected to one another and which are connected to one another via a double joint 24 c . In further agreement with the embodiment of FIG. 1, the arm part 1 c 'is attached to a pivot bearing 4 c , in particular an outer sleeve 5 c of a bracket 3 c , the pivot bearing 4 c largely corresponds to the pivot bearing 4 according to FIG. 1. At the free end 22 c of the arm part 1 c '', as with the support arm 1 '' according to FIG. 1, a swivel 23 c is provided on which a carrier 2 c is arranged. The sleeve 5 c is like the sleeve 5 with the interposition of an inner sleeve 6 c on a journal 7 c rotatably arranged. It is secured in the axial direction upwards by a cover plate 8 c and downwards by a radially extending annular collar 55 of the journal 7 c .

Below the pivot arm 1 c , a second pivot arm 56 is pivotally attached to the bracket 3 c or to the pivot bearing 4 c . The pivot arm 56 is substantially the same design as the swivel arm according to Fig. 5, 6. It has also two approximately equally long arm parts 57, 58, however, are much longer than the arm portions 33, 34 of FIGS. 5 and 6 The arm part 57 extends from the pivot bearing 4 c to about half the length of the arm part 1 c '' of the pivot arm 1 c above. The arm parts 57 , 58 , like the arm parts 33 , 34, are pivotally connected to one another via a double joint 59 . At the free end of the arm part 58 , as with the support arm 34 , a support 60 is rotatably fastened via a joint 61 , which can be or carries, for example, a concept holder, a lamp, a telephone. To adjust the inclination of the support 60 , an adjustment device 62 is provided which corresponds to the adjustment device 29 b according to FIG. 5.

The swivel arm 56 is fastened with its end facing away from the double joint 59 to a further outer sleeve 63 which corresponds to the outer sleeve 5 c . The outer sleeve 63 sits on an inner sleeve 64 which is arranged on the journal 7 c . The sleeves 63 , 64 are corresponding to the sleeves 5 , 6 according to FIG. 1 on the lower sleeves 11 c and 12 c . The sleeve 12 c sits, like the sleeve 12 , on the holder 3 c and is also screwed onto it with screws 65 , 66 . C The sleeve 11 is connected with screws 67, 68 with the bearing pin 7 c, the free ends of the coil c screw closure plate are screwed c 9 in a spigot on the bearing. 7

Otherwise, the pivot bearing 4 c is designed correspondingly to the pivot bearing 4 according to FIGS. 1 and 7.

The pivoting movement of the pivot arms 1 c and 56 , like that of the pivot arm 1, is limited by a stop device corresponding to the stop devices according to FIGS. 7 to 15. Each swivel arm is assigned a Haltein direction, which are approximately half the length of the sleeves 5 c and 63 . The identically designed stop devices consist, like the stop devices described above, of preferably two stops 70 and 71 or 72 and 73 , which are arranged adjustable in the journal 7 c . The stops formed by setscrews are not shown stop surfaces of circumferential grooves 74 , 75 of the sleeve 5 c and 63 are assigned. The stops and stop surfaces are designed correspondingly to the stops and stop surfaces according to FIG. 7. To adjust the stops 70 to 73 , in further accordance with the exemplary embodiment according to FIG. 7, mutually aligned plug openings 76 , 77 of the inner and outer sleeves 6 c , 64 and 5 c , 63 provided. This allows both swivel arms 1 c and 56 , as described with reference to FIGS. 7 to 15, to be pivoted into different stop positions, depending on the position in which the stops 70 to 73 are adjusted.

The bearing pin 7 c differs from the bearing pin 7 essentially in that the bearing pin 7 c extends over both sleeves 5 c and 63 and has the collar 55 in half length. On the collar, the inner sleeves 6 c and 64 are supported with their mutually facing end faces 80 and 81 .

If the swivel arm 56 is not required, it can be removed in a simple manner by loosening the outer sleeve 63 with the inner sleeve 64 from the journal 7 c and replacing it with an empty sleeve 63 d ( FIG. 17). At the strokes 72 d , 73 d are then sunk in the associated holes 82 and 83 of the lower portion 84 of the bearing pin 7 d . In this case, the outer sleeve 12 c according to FIG. 16 can also be omitted, so that the swivel arm 1 d from the holder 3 d has a smaller distance. The sleeve 11 d is attached directly to the bracket 3 d and the lens 9 d in this embodiment.

Claims (25)

1. Swivel arm device with at least one swivel arm, which has a holder for attachment to a piece of furniture, in particular a work table, and a support provided on a support arm for a device such as a screen and a swivel bearing, characterized in that the swivel bearing ( 4 , 4 c ) at least one adjustable stop ( 35 , 36 , 70 to 73 , 72 d , 73 d ) is assigned to the swivel limitation and to prevent rotation of the swivel arm ( 1 ; 1 c ; 1 d ), which stop with at least one counter stop ( 37 , 38 ) of the pivot bearing ( 4 , 4 c ) cooperates. 2. Swivel arm device according to claim 1, characterized in that at least one further stop ( 36 ) is provided which is in the pivoting direction ( P , P ') at a distance from the first stop ( 35 ). 3. Swivel arm device according to claim 1 or 2, characterized in that the stops ( 35 , 36 ; 70 to 73 ; 72 d , 73 d ) are each adjustable between a first and a second stop position. 4. Swivel arm device according to one of claims 1 to 3, characterized in that the stops ( 35 , 36 ; 70 to 73 ; 72 d , 73 d ) in their release position within the outer contour of a bearing pin ( 7 , 7 c ; 7 d ) of Swivel bearings ( 4 ; 4 c ) lie. 5. Swivel arm device according to one of claims 1 to 4, characterized in that the stops ( 35 , 36 ; 70 to 73 ; 72 d , 73 d ) are formed by pins, preferably grub screws. 6. Swivel arm device according to one of claims 1 to 5, characterized in that the stops ( 35 , 36 ; 70 to 73 ; 72 d , 73 d ) in superimposed bearing openings ( 41 , 42 ; 82 , 83 ), preferably threaded holes, the Bearing pin ( 7 , 7 c ; 7 d ) are arranged. 7. Swivel arm device according to one of claims 1 to 6, characterized in that the bearing openings ( 41 , 42 ; 82 , 83 ) crossing each other, preferably perpendicular to each other, are arranged. 8. Swivel arm device according to one of claims 1 to 7, characterized in that the counter-stops ( 37 , 38 ) are formed by end walls of a groove ( 44 ; 74 ) which in the inside of one on the bearing pin ( 7 ; 7 c ; 7 d ) rotatable sleeve ( 6 ; 6 c ) are arranged. 9. Swivel arm device according to claim 8, characterized in that the groove ( 44 ; 74 ) of the sleeve ( 6 ; 6 c ) extends over an angular range of approximately 180 °. 10. Swivel arm device according to claim 8 or 9, characterized in that the one stop ( 35 ) for securing the sleeve against rotation in its locking position projects into an opening ( 43 ) of the sleeve ( 6 ; 6 c ). 11. Swivel arm device according to one of claims 1 to 10, characterized in that the length of the preferably identical stops ( 35 , 36 ; 70 to 73 ; 72 d , 73 d ) at most equal to the diameter of the bearing pin ( 7 ; 7 c ; 7 d ) is. 12. Swivel arm device according to one of claims 1 to 11, characterized in that the pivot bearing ( 4 ; 4 c ) with the interposition of at least one, preferably a plurality of superposed outer sleeves ( 11 , 12 ; 11 c , 12 c ; 11 d , 63 d ) is connected to the bracket ( 3 ; 3 c , 3 d ). 13. Swivel arm device according to one of claims 8 to 12, characterized in that the bearing openings ( 41 , 42 ), seen in their axial direction, are at the level of the groove ( 44 ). 14. Swivel arm device according to one of claims 1 to 13, characterized in that the swivel arm ( 1 c , 1 d , 56 ) from at least one, preferably at least two articulated arm parts ( 1 ', 1 ''; 1 a , 1 a ''; 33 , 34 ; 1 c ', 1 c ''; 57, 58 ). 15. Swivel arm device according to claim 14, characterized in that the arm parts ( 1 ', 1 ''; 1 a ', 1 a ''; 33 , 34 ; 1 c ', 1 c ''; 57, 58 ) each have a Joint ( 23 , 23 a ; 23 b ; 24 , 24 a , 24 b , 24 b ', 24 c ; 59 ) with each other and / or with the pivot bearing ( 4 ; 4 c ) and the carrier ( 2 , 2 a , 2 b , 2 b '; 2 c ; 60 ) are coupled. 16. Swivel arm device according to claim 15, characterized in that the joints ( 24 , 24 b ; 24 c ; 59 ) are designed as a double joint with two joint axes lying next to one another. 17. Swivel arm device according to one of claims 14 to 16, characterized in that the arm part facing away from the swivel bearing ( 4 ; 4 c ) ( 1 '', 1 a '', 32 , 34 ; 1 c ''; 58 ) at its free End ( 22 ) the support ( 2 , 2 a , 2 b , 2 b '; 2 c ; 60 ), preferably before a support plate or a support frame, has. 18. Swivel arm device according to claim 17, characterized in that the support (2nd a,2nd b,2nd b′;2nd c;60) swiveling at the free arm end (22) is stored. 19. Swivel arm device according to claim 17 or 18, characterized in that the support ( 2 a , 2 b ; 2 c ; 60 ) for tilt adjustment on the arm part ( 1 a '', 34 ; 1 c ''; 58 ) is arranged . 20. Swivel arm device according to one of claims 1 to 19, characterized in that at least two superposed, stop-limited swivel arms ( 1 c , 65 ) are provided. 21. Swivel arm device according to claim 20, characterized in that the swivel arms ( 1 c , 65 ) are mutually bordered in the swivel direction. 22. Swivel arm device according to claim 20 or 21, characterized in that the swivel arms ( 1 c , 65 ) one above the other have outer and inner sleeves ( 5 c , 63 and 6 c , 64 ) on a journal ( 7 c ) of the swivel bearing ( 4 c ) sit. 23. Swivel arm device according to claim 22, characterized in that the bearing pins ( 7 c ) have an annular collar ( 55 ) which lies between the sleeves ( 5 c , 6 c , 63 , 64 ) of the swivel arms ( 1 c , 65 ). 24. Swivel arm device according to one of claims 20 to 23, characterized in that in the upper and below the annular collar ( 55 ) lying portions of the journal ( 7 c ) at least one, preferably two adjustable stops ( 70 to 73 ) are provided, which at least one counter stop of the swivel bearing ( 4 c ) is assigned. 25. Swivel arm device according to one of claims 20 to 24, characterized in that the one swivel arm ( 1 c ) a carrier ( 2 c ) for, for example, a screen and the other swivel arm ( 65 ) a carrier ( 60 ) for, for example, a telephone and / or have documents.