DE202015003181U1 - Manually adjustable monitor mount for a flat screen of a mobile diagnostic device - Google Patents

Abstract

A manually adjustable monitor holder (15) for a flat screen (12) of a mobile diagnostic device (1) with a shoulder joint (3) rotatably mounted on a mounting surface (14) about a vertical axis of rotation (13), on which a first arm (5) pivots first horizontal pivot axis (4) about a pivot angle WS (60) between a pivot angle (64) which is associated with a stop (54) and a pivot angle (65) which is associated with a stop (55) is pivotally mounted, wherein an elbow joint (7) with a second horizontal pivot axis (8) parallel to the first horizontal pivot axis (4) and a second arm (9) is arranged on the side of the first arm (5) facing away from the shoulder joint (3), wherein between the first arm and the second arm has a pivot angle WS (70) of the elbow joint (7) between a pivot angle (78) associated with a stop (58) and a pivot angle (79) associated with a stop (59), and where the second arm having a wrist (17) supporting an adjustable flat panel display (12) and wherein the monitor support (15) includes means for preventing a collision of the flat panel display (12) with the surface of the mobile diagnostic device (1) collision-prone area (80) is defined by a set of value pairs of pivoting angles WS (60) of the shoulder joint (3) and pivoting angles ES (70) of the elbow joint (7), characterized in that the means for preventing a collision limits the movement of the monitor support (80). 15) so as to inhibit movement in a direction about the first horizontal pivot axis (4) or in a direction about the second horizontal pivot axis (8) if continued movement about the pivot axes (4, 8) would result in that the value pairs of the swivel angles WS (60) of the shoulder joint (3) and the swivel angles ES (70) of the elbow joint (7) in the Amount of value pairs of pivot angles (60, 70) of the collision-prone area (80) would be included.

Description

Manually adjustable monitor mount for a flat screen of a mobile diagnostic device.

From medical diagnostics, in particular from the imaging X-ray or ultrasound diagnostics mobile diagnostic devices are known which have a monitor, in particular a flat screen for image viewing by an operator. To improve the ergonomics of the monitor use is known to arrange the monitor adjustable on the mobile diagnostic device.

From the patent literature, manually adjustable monitor holders for mobile diagnostic devices are known.

From the PCT application WO05074807A1 an ultrasound examination system with a multi-adjustable holder for a flat screen is known, wherein the holder has a parallelogram and which is compensated by the weight of the flat screen and a support arm by a lever assembly with a gas spring.

From the document US6669639B1 a monitor holder with a support arm on a mobile ultrasonic diagnostic device is known, wherein the holder has three joints with mutually spaced parallel vertical axes and at least one joint is limited in its Winklelbewegung to avoid a collision of the support arm with the diagnostic device.

From the EP1880678B1 is a manually adjustable monitor mount with a built-in monitor mount cable management known, the monitor is displaceable about three parallel vertical axes.

From the DE 10 2007 059 312 A1 a manually adjustable monitor mount is known, which has a locking mechanism by means of which an unwanted collision movement of the monitor is prevented with a wall in the process of mobile unit.

From the document KR1020100047436A1 a monitor mount on a mobile ultrasonic diagnostic device is known in which sensors for detecting a risk of collision between the monitor and a part of the diagnostic device is provided.

From the document DE 20 2005 009 471 U1 is a monitor mount with three joints with spaced vertical pivot axes are known in which stops are provided to limit the displacement in the joints.

From the document DE4014009A1 a support arm gear tray for monitoring monitors with a parallelogram and a arranged between this and the head support for the monitor arm is known, whereby the head carrier is forcibly pivoted in response to the adjustment movement of the parallelogram carrier about a horizontal axis.

Manually adjustable monitor mounts are known which detect a risk of collision or which have devices for limiting movement in one axis.

There is a need for manually adjustable monitor brackets having means for preventing collisions of parts of the monitor arm and / or the flat screen with parts of the mobile diagnostic device, which means are economically adaptable to individually designed diagnostic devices.

The novelty solves this solved according to the features of claim 1.

The invention will be explained in more detail with reference to the drawings.

1 is a mobile diagnostic device 1 with an exemplary control 2 and a mounting surface 14 for the monitor holder 15 shown. The operating element 2 is shown as representative of the operating elements of the diagnostic device. Depending on the functionality required by the user, the number and arrangement of the controls can be 2 vary within a control panel, which requires individually adaptable means for collision prevention. The monitor bracket 1 indicates one on the mounting surface 14 arranged shoulder joint 3 on that around a vertical axis of rotation 13 regarding the mounting surface 14 is rotatable. The shoulder joint 3 has a first horizontally arranged pivot axis 4 on to a first arm 5 in the swing direction 6 is pivotable. At the mounting surface 14 opposite end of the first arm 5 is a second horizontal pivot axis 8th arranged, which is an elbow joint 7 with a second arm arranged thereon 9 that carries in the direction of movement 10 with respect to the first arm 5 is pivotable.

In a parking position of the monitor holder 15 , which is set up in the process of the mobile diagnostic device, a lock is provided in all joints. In particular, it is provided in the shoulder joint 3 a parking brake at the same time on the first horizontal pivot axis 4 and on the vertical axis of rotation 13 to let act.

The second arm 9 carries around a third horizontal pivot axis 18 swiveling wrist 17 with one hand 11 one around a vertical axis of rotation 20 limited rotatably supported support plate 19 wearing. On the support plate 19 is the flat screen 12 by means of a pivot bearing 21 around a fourth horizontal pivot axis 22 kept limited pivotally mounted.

The monitor bracket 15 has a double parallelogram linkage assembly with three horizontal pivot axes 4 . 8th . 18 on, being in the arms 5 and 9 Weight compensation devices are arranged.

The double parallelogram linkage arrangement with the arms 5 and 9 and the three horizontal pivot axes 4 . 8th . 18 is designed such that the hand axis of rotation 20 the hand 11 over the entire adjustment range of the monitor holder 15 perpendicular and thus always parallel to the vertical axis of rotation 13 remains aligned.

The weight forces of the flat screen 12 and the arms 5 . 9 as well as the joints 7 . 17 generate torques that act in the direction of the adjustment of the joints. It is envisaged to generate by counter tension or compression coil springs or gas springs corresponding counter torques and / or by increasing the friction in the joints 3 . 7 and 17 the monitor bracket 15 to stabilize. The means for torque compensation are not shown in the figures.

The shoulder joint 3 and the elbow joint 7 have in addition to the coupling through the double Parallelogrammlenkeranordnung on an additional coupling. This additional coupling is in 1 schematically by a rod-shaped control 42 shown. The coupling of the joints takes place in such a way that certain combinations of a pivoting angle of the first arm 5 in the shoulder joint 3 and a swing angle of the second arm 9 in the elbow joint 7 by blocking the joints 3 and 7 are not adjustable.

The additional coupling is not limited to a mechanical coupling; It is provided in the context of the invention to determine the position information of the joints by means of encoders and to cause the blockage of the joints by electromotive or electromechanical.

In 1 is a rod-shaped control 42 represented by interaction with cams in the joints 3 . 7 the mutual blockage of the joints 3 and 7 causes. Due to the shape of the cams and their mutual orientation collisions of the flat screen 12 with the mobile diagnostic device and in particular with a control element 2 prevents the mobile diagnostic device. The coupling mechanism of cams and control 42 allows an operator to place the flat screen outside the collision-prone areas within the limits of the allowable adjustment ranges of the monitor mount 15 free to move.

The additional coupling mechanism limits the range of motion of the one joint 3 . 7 with respect to the position of the adjacent other joint 7 . 3 within the respective permissible adjustment range of the joint 3 . 7 one.

Due to the limited pivoting movements in the axes 20 and 22 is the flat screen opposite the support plate 19 so manually adjustable that an ergonomic view of the flat screen is made possible by an operator.

In 2 is the coupling mechanism between the on the mounting surface 14 the mobile diagnostic device arranged shoulder joint 3 and by the first arm 5 with the shoulder joint 3 connected elbow joint 7 with the second arm arranged thereon 9 shown.

The first arm 5 is in the shoulder joint 3 around a horizontal pivot axis 4 and in the elbow joint 7 around a second horizontal pivot axis 8th pivotable. The joints 3 . 7 have cam disks 53 . 57 on, whose curves in a plane perpendicular to the mutually parallel, horizontal pivot axes 5 . 8th lie. In the plane of the cam discs 53 . 57 is one on the connecting line between the horizontal axes 4 and 8th rod-shaped control means 42 on the first arm 5 arranged and held on this longitudinally displaceable.

The cam 53 of the shoulder joint 3 is through two stops 54 . 55 limited, in cooperation with the control means 42 the permissible pivoting range of the first arm 5 in the shoulder joint 3 determine.

The cam 53 has a blocking sector ( 21 ) and a release sector ( 22 ) each having arcuate curve sections, wherein the center of the circular arcs on the first horizontal pivot axis 4 lies. The blocking sector 21 (S1) has a circular arc-shaped curve with a radius 23 (r1) on, the release sector 22 (S2) has a circular arc-shaped curve with a radius 24 (r2), where the radius 23 greater than the radius 24 is. Between the circular arcs of the blocking sector 21 and the release sector 22 is a transition area 25 provided with which the circular arcs with the different radii 23 . 24 are constantly connected.

The elbow joint 7 has a cam 57 on that by two stops 58 . 59 are limited, which in cooperation with the control means 42 the permissible pivoting range of the first arm 5 in the elbow joint 7 and thus the permissible pivoting range of the second arm 9 with respect to the first arm 5 determine.

The cam 57 has a lock sectors 31 and a release sector 32 with arcuate curve sections, wherein the center of the circular arcs on the second horizontal pivot axis 8th lies. The blocking sector 31 (E1) has a circular arc curve with a radius 33 (r3) on, the release sector 32 (E2) has a circular curve with a radius 34 (r4), where the radius 33 greater than the radius 34 is. Between the circular arcs of the blocking sector 31 and the release sector 32 is a transition area 35 provided with the circular arcs with the different radii 33 . 34 are constantly connected.

The radii 23 (r1) and 33 (r3) are the same size; so are the radii 24 (r2) and 34 (r4) the same size.

At one of the two curves of the cam discs 53 . 57 becomes the rod-shaped control means 42 that a length 41 during the pivotal movements in the horizontal pivot axes 4 and 8th guided along. It is envisaged the ends of the rod-shaped control means 42 to form spherical to achieve a low sliding friction. It is also alternatively provided at the ends of the rod-shaped control means 42 To provide stored rollers, which are on the cams 53 . 54 roll.

To achieve the blocking effect of the coupling mechanism, the rod-shaped control means 42 a length 41 (L) on that with the distance 40 (A) the horizontal pivot axes 4 . 8th and the radii 23 . 24 . 33 . 34 (r1, r2, r3, r4) are related: L = A - (r2 + r3 + x) [1] where x represents a mechanical game to which the conditions apply x <(r1 - r2) and x <(r3 - r4) [2]

The arrangement of the rod-shaped control 42 between the cams 53 and 57 causes all combinations of angular positions of the first arm 5 and the second arm 9 in the joints 3 . 7 are locked when the axis of the rod-shaped control 42 through both blocking segments ( 21 . 31 ).

It is intended, the cams 53 . 57 detachable at the joints 3 . 7 to arrange. This makes it easy to adjust by changing the cams the stopband.

In 2 is a rod-shaped control means 42 with a fixed length 40 (L), for example by means of a first arm 5 arranged, not shown tension or compression spring to the cam 53 is pressed.

It is further provided, the rod-shaped control means 42 to perform as a telescopic rod with a compression spring, wherein the length L1 of the telescopic rod in the collapsed state of length L corresponds to the formula [1] and the length L2 of the telescopic rod in the extended state of the condition satisfies: L2> A - (r2 + r4) [3]

Such a dimensioned spring-loaded telescopic rod is always rattle-free at the two curves of the cams throughout the adjustment of the monitor bracket with its ends 53 . 57 issue.

The operation of the coupling mechanism is based on the 2 described in more detail. In the example of 2 is the first arm 5 opposite the mounting surface 14 slightly inclined in the direction of the flat screen, not shown. The second arm 9 is little of the first arm 5 swung away. Leaving the pivoting of the first arm in the shoulder joint 3 unchanged, so can the elbow joint 7 over the entire permissible swivel range between the stops 58 and 59 be pivoted without inhibition. This always applies as long as the rod-shaped control means 42 in sector S2 of the cam 53 between the stop 55 and the transition area 25 located.

If you go back from the in 2 illustrated position of the joints 3 . 7 turning the first arm counterclockwise in the shoulder joint without pivoting the elbow joint will cause further movement of the first arm 5 by running the lower end of the rod-shaped control means 42 against the transition area 25 the cam 53 in which the radius of the curve steadily increases, inhibits and locks. The locking of the pivotal movement of the first arm 5 can be canceled by the fact that the second pivot arm 9 in the shoulder joint 7 is pivoted clockwise until the upper end of the rod-shaped control means the transition region 35 has achieved and further Turn clockwise to reach sector E2. The further pivoting in the shoulder joint is possible until the stop 59 is reached.

Is the upper end of the rod-shaped control means 42 in the sector E2 of the elbow joint, the first arm in the entire region of the sectors S1 and S2 between the attacks 54 and 55 be moved without inhibition. The angles of sectors S1 and E1 determine the size of the locked area. The angles of the sectors are determined by the kinematics of the monitor mount and the location of the collision-prone area with the control element 2 established. The blocking area is reduced by reducing the angle of the blocking sectors 21 (S1) and 31 (E1) reduced.

Through the device are all joint positions of the joints 3 . 7 and the first arm 5 and the second arm 9 locked when the axis of the rod-shaped control 42 through both locking sectors 21 (S1) and 31 (E1).

It is further provided that on the first arm ( 5 ) Control means 42 are arranged, which have locking means, wherein a first locking means on the shoulder joint 3 and a second locking means on the elbow joint 7 acts and that with the first blocking means the movement of the shoulder joint 3 around the first horizontal axis 4 is lockable in one direction of rotation and that with the second blocking means the movement of the elbow joint 7 around the second horizontal pivot axis 8th Lockable in one direction of rotation and that the locking means are controlled by means of a control, which controls the movement of a joint 3 . 7 locked in one direction of rotation, if by continuing the movement of the flat screen ( 12 ) would enter a specified, collision-prone blocking area, wherein the collision-prone blocking area by a combination of angular positions of the first arm 5 with the shoulder joint 3 and with the elbow joint 7 is fixed. Determination of angular positions in joints 3 . 7 can be done by means of encoders whose measured values are fed to an electronic controller which activates and deactivates the preferably electromagnetic blocking means.

It is further provided that by means of the control both joints 3 . 7 can be locked. In particular, it is advantageous if in a parking position of the flat screen 12 the first horizontal pivot axis 4 and the second horizontal pivot axis 8th as well as the vertical axis of rotation 13 be blocked. In the method of the mobile diagnostic device is thereby effectively prevented that the flat screen performs uncontrolled movements, leading to a collision of the flat screen 12 with other devices or with parts of buildings.

It is further provided, the first horizontal pivot axis 4 and the vertical axis of rotation of the shoulder joint 3 simultaneously with a single manually operated, mechanical brake to block.

It is also provided the shoulder joint 3 and the elbow joint 7 equipped with servomotors, which provide a manually guided movement of the flat screen 12 motor assist, with a servo control the movement of the monitor bracket 15 prevented in the collision-prone blocking area by inhibiting the servo assistance of the servomotors. The collision-prone area is set in a table of the servo control control program.

In 3b the adjustment range of the monitor arm is shown in a diagram, which is the collision-prone area 80 maps. The swivel angle 60 (WS) in the shoulder joint 3 and 70 (WE) in the elbow joint 7 are in 3a shown schematically. The critical angle of the pivoting movement in the shoulder joint 3 are through the dashed lines 65 (assigned to the stop 55 ) and 64 (assigned to the stop 54 ). The critical angle of the pivotal movement in the elbow joint 7 are through the dashed lines 78 (assigned to the stop 58 ) and 79 (assigned to the stop 59 ). Inside of the dashed lines 78 . 79 . 64 . 65 formed area is the collision-prone area 80 as well as a trajectory 81 located. Moving the monitor arm along the trajectory 81 , starting at the stop 55 ie on the dashed line 65 such that the swivel angle 60 (WE) in the elbow joint 7 remains unchanged, the trajectory at the arrowhead reaches the collision-prone area 80 , The pivot angle combinations in the hatched area 80 are blocked for the movement of the monitor arm by means of the device according to the invention. At the end of the drawn trajectory 81 is a further enlargement of the swivel angle 60 (WS) no longer possible without the swivel angle 70 (WE) is increased. At the end of the trajectory 81 is also a reduction of the swivel angle 70 blocked by the control means. The trajectory 81 can be continued such that the collision-prone area is bypassed.

The novelty concerns a manually adjustable monitor mount 15 for a flat screen 12 a mobile diagnostic device 1 with one on a mounting surface 14 around a vertical axis of rotation 13 rotatably mounted shoulder joint 3 on which a first arm 5 around a first horizontal pivot axis 4 around a swivel angle (WS) 60 between a swivel angle 64 that's a stop 54 is assigned and a swivel angle 65 that's a stop 55 is assigned, swiveling is stored, being at the shoulder joint 3 opposite side of the first arm 5 an elbow joint 7 with a first horizontal pivot axis 4 parallel second horizontal pivot axis 8th and a second arm 9 is arranged, wherein between the first arm and the second arm, a pivot angle WS 70 of the elbow joint 7 between a swivel angle 78 that's a stop 58 is assigned and a swivel angle 79 that's a stop 59 is assigned, is adjustable and where the second arm is a wrist 17 that has an adjustable flat screen 12 carries and where the monitor bracket 15 a device for preventing a collision of the flat screen 12 with the surface of the mobile diagnostic device 1 having a collision-prone area 80 through a set of value pairs of swivel angles WS 60 of the shoulder joint 3 and swivel angles ES 70 of the elbow joint 7 is determined, wherein the means for preventing a collision, the movement of the monitor bracket 15 so limited that a movement in one direction about the first horizontal pivot axis 4 or in a direction about the second horizontal pivot axis 8th is locked, if a continuation of the movement about the pivot axes 4 . 8th would cause the value pairs from the swivel angle WS 60 of the shoulder joint 3 and the swivel angles ES 70 of the elbow joint 7 in the set of value pairs of the collision-prone area 80 would be included.

It is envisaged that the device for preventing a collision has an electronic control, the electromechanically controllable freewheels on the axles 4 . 8th such that the pairs of values from the pivot angles WS 60 of the shoulder joint 3 and the swivel angles ES 70 of the elbow joint 7 in the set of value pairs of the collision-prone area 80 are locked, with the angular positions of the joints 3 . 7 in the axes 4 . 8th be determined by encoders and the electronic control supplied, wherein the set of value pairs of the collision-prone area 80 stored in a look-up table of a memory of the electronic controller.

It is further contemplated that the monitor bracket 15 in the axes 4 . 7 Having servomotors for motor support manual movement and the servomotors are controlled by an electronic control such that the value pairs of the pivot angles WS 60 of the shoulder joint 3 and the swivel angles ES 70 of the elbow joint 7 in the set of value pairs of the collision-prone area 80 are locked, with the angular positions of the joints 3 . 7 in the axes 4 . 8th be determined by encoders and the electronic control supplied, wherein the set of value pairs of the collision-prone area 80 stored in a look-up table of a memory of the electronic controller.

It is further contemplated that the means for preventing a collision a cam 53 in the shoulder joint 3 with stops 54 . 55 , a cam 57 in the elbow joint with stops 58 . 59 and a rod-shaped control means 42 having, on the first arm 5 slidably disposed and one end with the cam 53 of the shoulder joint 3 and its other end with the cam 57 of the elbow joint 7 is in operative connection, wherein the cam 53 of the shoulder joint 3 a blocking segment 21 and a release segment 22 has and the cam 57 of the elbow joint 7 a blocking segment 31 and a release segment 32 having, wherein the locking segments 21 . 31 the value pairs of the swivel angle WS 60 and WE 70 from the set of value pairs in the collision-prone area 80 depict the curves of the cams 53 . 57 are composed of circular arc sections whose center is the horizontal pivot axis 4 . 8th of the respective joint 3 . 7 is, wherein the circular arc sections of the respective cam discs 53 . 57 in a respective transition area 25 . 35 are constantly connected, with the blocking segments 21 . 31 Circular arc sections with a larger radius 23 . 33 as the radius 24 . 34 the circular arc sections of the adjacent release segments 22 . 32 and the rod-shaped control 42 in the plane of the cams 53 . 57 and each perpendicular to the horizontal pivot axes 4 . 8th is arranged and reduced by a mechanical clearance length L 41 having the distance A 40 the swivel axes 4 . 8th , reduced by the sum of the radius 24 of the circular arc section of the release segment 22 and the radius 33 the circular arc portion of the barrier segment 31 equivalent.

It is further contemplated that the rod-shaped control means 42 at its ends in each case has a roller on the associated cam 53 . 57 rolls. It is also contemplated that the rod-shaped control means 42 as a telescopic rod with a minimum length of length L 41 is trained.

It is advantageous if the cam discs for determining the collision-prone area 80 are interchangeable and the locking segments 21 . 31 and the release segments 22 . 32 can be selected from a modular system.

List of pictures

1 : Monitor holder on a mobile diagnostic device

2 : Locking mechanism for collision prevention with a mutual influence of adjacent joints

3a : Swing angle in the shoulder and elbow joint

3b : Swivel angle and collision-prone area

LIST OF REFERENCE NUMBERS

1

Mobile diagnostic device

2

operating element

3

shoulder joint

4

First horizontal swivel axis

5

First arm

6

pan direction

7

elbow joint

8th

Second horizontal pivot axis

9

Second arm

10

Swing direction of the second arm

11

hand

12

flat

13

Vertical axis of rotation

14

mounting surface

15

monitor mount

17

wrist

18

Third horizontal pivot axis

19

support plate

20

Hand axis of rotation

21

pivot bearing

21

blocking sector

22

Fourth horizontal pivot axis

22

release sector

23

Radius of the blocking sector 21

24

Radius of the release sector 22

25

Transition area

31

blocking sector

32

release sector

33

Radius of the blocking sector 31

34

Radius of the release sector 32

35

Transition area

40

Distance of the axes 4 and 8th

41

Length of the control

42

control

53

Cam of the joint 3

54

attack

55

attack

57

Cam of the joint 7

58

attack

59

attack

60

Swivel angle WS of the shoulder joint

64

Swivel angle at the stop 54

65

Swivel angle at the stop 55

70

Swivel angle ES of the elbow joint

78

Swivel angle at the stop 58

79

Swivel angle at the stop 59

80

Collision-prone area

81

trajectory

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• WO 05074807 A1 [0004]
• US 6669639 B1 [0005]
• EP 1880678 B1 [0006]
• DE 102007059312 A1 [0007]
• KR 1020100047436 A1 [0008]
• DE 202005009471 U1 [0009]
• DE 4014009 A1 [0010]

Claims (8)

Manually adjustable monitor mount ( 15 ) for a flat screen ( 12 ) a mobile diagnostic device ( 1 ) with one on a mounting surface ( 14 ) about a vertical axis of rotation ( 13 ) rotatably mounted shoulder joint ( 3 ), on which a first arm ( 5 ) about a first horizontal pivot axis ( 4 ) by a swivel angle WS ( 60 ) between a swivel angle ( 64 ), which is a stop ( 54 ) and a swivel angle ( 65 ), which is a stop ( 55 ) is pivotally mounted, wherein at the shoulder joint ( 3 ) facing away from the first arm ( 5 ) an elbow joint ( 7 ) with a first horizontal pivot axis ( 4 ) parallel second horizontal pivot axis ( 8th ) and a second arm ( 9 ), wherein between the first arm and the second arm, a pivot angle WS ( 70 ) of the elbow joint ( 7 ) between a swivel angle ( 78 ), which is a stop ( 58 ) and a swivel angle ( 79 ), which is a stop ( 59 ) is adjustable, and wherein the second arm is a wrist ( 17 ), which has an adjustable flat screen ( 12 ) and wherein the monitor mount ( 15 ) means for preventing a collision of the flat screen ( 12 ) with the surface of the mobile diagnostic device ( 1 ), where a collision-prone area ( 80 ) by a set of value pairs of swivel angles WS ( 60 ) of the shoulder joint ( 3 ) and swivel angles ES ( 70 ) of the elbow joint ( 7 ), characterized in that the means for preventing a collision, the movement of the monitor bracket ( 15 ) such that movement in one direction about the first horizontal pivot axis (FIG. 4 ) or in a direction about the second horizontal pivot axis (FIG. 8th ) is blocked if a continuation of the movement about the pivot axes ( 4 . 8th ) would cause the pairs of values from the swivel angles WS ( 60 ) of the shoulder joint ( 3 ) and the swivel angles ES ( 70 ) of the elbow joint ( 7 ) in the set of value pairs of pivoting angles ( 60 . 70 ) of the collision-prone area ( 80 ) would be included. Manually adjustable monitor mount according to claim 1, characterized in that the device for preventing a collision comprises a cam ( 53 ) in the shoulder joint ( 3 ) with stops ( 54 . 55 ), a cam ( 57 ) in the elbow joint with stops ( 58 . 59 ) and a rod-shaped control means ( 42 ), which on the first arm ( 5 ) is slidably disposed and whose one end with the cam ( 53 ) of the shoulder joint ( 3 ) and its other end with the cam ( 57 ) of the elbow joint ( 7 ) is in operative connection, wherein the cam disc ( 53 ) of the shoulder joint ( 3 ) a blocking segment ( 21 ) and a release segment ( 22 ) and the cam ( 57 ) of the elbow joint ( 7 ) a blocking segment ( 31 ) and a release segment ( 32 ), wherein the blocking segments ( 21 . 31 ) the value pairs of the swivel angle WS ( 60 ) and WE ( 70 ) from the set of value pairs of the collision-prone area ( 80 ), wherein the curves of the cam discs ( 53 . 57 ) are composed of circular arc sections whose center is the horizontal pivot axis ( 4 . 8th ) of the respective joint ( 3 . 7 ), wherein the circular arc sections of the respective cam discs ( 53 . 57 ) in a respective transitional area ( 25 . 35 ) are continuously connected to each other, wherein the blocking segments ( 21 . 31 ) Circular arc sections with a larger radius ( 23 . 33 ) as the radius ( 24 . 34 ) of the circular arc sections of the adjacent release segments ( 22 . 32 ) and the rod-shaped control ( 42 ) in the plane of the cam discs ( 53 . 57 ) and in each case perpendicular to the horizontal pivot axes ( 4 . 8th ) and a length L (reduced by a mechanical clearance) 41 ), which corresponds to the distance A ( 40 ) of the pivot axes ( 4 . 8th ), reduced by the sum of the radius ( 24 ) of the circular arc section of the release segment ( 22 ) and the radius ( 33 ) of the circular arc portion of the barrier segment ( 31 ) corresponds. Manually adjustable monitor holder according to claim 2, characterized in that the rod-shaped control means ( 42 ) has at its ends in each case a roller which on the associated cam ( 53 . 57 ) rolls off. Manually adjustable monitor holder according to claim 2, characterized in that the rod-shaped control means ( 42 ) as a telescopic rod with a minimum length of length L ( 41 ) is trained. Manually adjustable monitor holder according to one of Claims 2-4, characterized in that the cam discs are used to define the region ( 80 ) are interchangeable and the blocking segments ( 21 . 31 ) and the release segments ( 22 . 32 ) are selectable from a modular system. Manually adjustable monitor mount according to claim 1, characterized in that the means for preventing a collision comprises an electronic control, the electromechanically controllable freewheels on the axles ( 4 . 8th ) such that the pairs of values from the pivot angles WS ( 60 ) of the shoulder joint ( 3 ) and the swivel angles ES ( 70 ) of the elbow joint ( 7 ) in the set of value pairs of the collision-prone area ( 80 ) are locked, the angular positions of the joints ( 3 . 7 ) in the axes ( 4 . 8th ) are determined by rotary encoders and supplied to the electronic control, wherein the set of value pairs of the collision-prone area ( 80 ) in a look-up table of a memory of the electronic control are stored. Manually adjustable monitor holder according to claim 1, characterized in that the monitor holder ( 15 ) in the axes ( 4 . 7 ) Servomotores for motor support of the manual movement and the servomotors are controlled by an electronic control such that the value pairs from the pivot angles WS ( 60 ) of the shoulder joint ( 3 ) and the swivel angles ES ( 70 ) of the elbow joint ( 7 ) in the set of value pairs of the collision-prone area ( 80 ) are locked, the angular positions of the joints ( 3 . 7 ) in the axes ( 4 . 8th ) are determined by rotary encoders and supplied to the electronic control, wherein the set of value pairs of the collision-prone area ( 80 ) are stored in a look-up table of a memory of the electronic control. Manually adjustable monitor holder according to one of claims 1-7, characterized in that the monitor holder ( 15 ) is lockable in a park position in all joints and that in the shoulder joint ( 3 ) a parking brake at the same time on the first horizontal pivot axis ( 4 ) and on the vertical axis of rotation ( 13 ) acts.

Images