DE6900877U - ADJUSTABLE TRIPOD FOR AN OPTICAL OBSERVATION DEVICE. - Google Patents

Description

Ing. H. MITSCHERUCH Ρ, —t'MDMCHEN 22 Ing. FC GUNSCHMANN j, "ij ****" ·· ti

* .r, not. W. KÖRBER · '* ^mi ®

ing. j. schMiDT-EVERS ;

PATENT LAWYERS I

28 * December 1972 I

Utility model registration G 69 oo 877.1 Contraves AG

Adjustable tripod for an optical observation device

The subject of the present invention is an adjustable tripod for an optical observation device, preferably for a Binocular microscope. Such tripods and observation devices are required by brain surgeons to perform operations, for example to close damaged blood vessels, we5J_ the organ parts to be treated and the instruments used have such small dimensions that they can only be observed in a corresponding optical magnification - preferably stereoscopically are.

In known tripod arrangements, the observation device is gimbal to a self-adjustable articulated frame like this attached that it is adjustable in all points j3ier setting level and in each case orientierbax to the desired object location * is. It assumes: but the pretense that the Chrurg in question interrupts the operation and uses it

of his hands "brings about the desired adjustment .; Furthermore must according to the new orientation of the observation device the optical focus can almost always be set again. Such new hires are time consuming and it is desirable to do so without the use of the hands of the Surgeons to accomplish.

The tripod according to the invention is characterized in that a headrest mechanically connected to the observation device is and that control elements for drive units of tripod parts are arranged in the headrest in such a way that depending on the corresponding head movements relative to the control elements of the headrest via the controllable drive »- units movements of the observation device can be triggered in corresponding degrees of freedom. It is advantageous to provide that the observation device on a Ln at least one Coordination direction relative to the tripod translationally adjustable Object location is adjustable and in this classification by the action of head movements of the observer the headrest mechanically connected to the observation device around the set object location as a center of rotation in at least is pivotable in one direction of rotation.

This enables observation to be made of the surgical site, can only be viewed from a different, more favorable viewing direction by corresponding head tilting, with the Focus on right remains, because yes that Pivoting the observation device around a fixed object location (Operation site) as a turning center :.

So that other distances to the object can be set on the observation device, a device carrier is advantageously provided,! on which the observation device together with the headrest

13-

for optical focusing on the object location in the direction of observation, i.e. in the direction of the optical axis, is adjustable by two angles, each directed at the object location mutually oriented axes of rotation is pivotable.

With a veireinfäcnieFt ÄüsfühF-ungsforin of the invention System, the equipment carrier can be directed to the object location The pivot bearing can be pivoted in an angled arm, and the angled arm around a likewise directed at the object location Pivot bearing, for its part, can be pivoted in a column part that is translationally adjustable in at least one coordinate direction be.

In a preferred embodiment, however, the device carrier is a side part of a parallel linkage form _a is always directed to the object location defining open corner of the parallelogram and is pivotable in the parallelogram plane around its open corner. It is very advantageous to ensure that the rotary movements of the device carrier around its set object location on the one hand and the movements for moving the object location on the other hand can be prevented or jointly released by means of locking devices that can be controlled in groups with a common effect. Are pure rotational movements of the device wearer or the Monitoring \ device to two intersecting axes in the selected object location rotation, provided appropriate counterbalancing mechanisms are provided without any particular difficulty directly: The generated by the impact of the head on the headrest. In contrast, this is not so easy for generating the translational displacement movements of the device carrier that are necessary for setting another object location.

The adjustment of the object location can be done by shifting movements of tripod parts in three directions or by rotating tripod parts in at least two directions with movement in the direction of observation. Embodiments of the subject matter of the invention are in Drawing shown. Show it:

Fig. 1 is an elevation through part of a first embodiment;

FIG. 2 is an elevation, partly in section, through a perfected preferred embodiment in FIG semi-schematic representation;

Fig. 3 is a partial plan along the line III-III of Fig. 2;

FIG. H shows an electrical principle diagram for the control of the motors from FIG. 2.

According to FIG. 1, a machine stand part lix: not set is translationally displaceable in at least one of the schematically drawn coordinate directions X _s Y ₃ , Z relative to a stationary stand base. In a pivot bearing * 2 connected to the upright part 1, an aHnkelara _{3 is} rotatably mounted on the axis A 3. As the free end of the Kinkelarmes 3 a pivot bearing * i is used for the support body 5 of an Eeobachtungsgerates δ so that the body? 5 saut the observation device 6 via the axis of rotation A- is rotatable. IfcLe axes of rotation ä_ of the l-iinkelarnes 3, or A ^ of the support body intersect iss. Fvauct 0, which forms the link. As the support body 5, a guide rail 7 is fastened in such a way that in a guide groove: this rail 7 a binocular microscope 6 as an observation device and a dashboard with a common

Santer headrest · carrier So affiliated S toward ö _e s arrow? ", that can be moved towards and from the object location 0, which in a conventional manner over a. Rack and pinion drive with a one-piece gear 7 ο made chimney. The Hinokular-I-ükoskop 6 remains so when the support body 5 rotates about the axis A ₅ and the angular arine 3 about the axis A ₀ always directed to the object location 0 and focused. The headrest 8 allows the observer's head to be inserted into the correspondingly designed curvature and the triggering of the desired rotary movement of the 3inocular hikroscope around the set object location 0 as a rotary centruxa directly by transmitting appropriate head movements from the head to the headrest 8 and the rail 7 the body 5. It is therefore possible for a surgeon to shift the line of sight to the surgical site in site 0 without using his hands.

In the preferred embodiment according to FIGS. 2 - U , Io denotes a stationary stand base, in which a slide 11 can be moved translationally in the direction of the coordinate axis X with the aid of a screw spindle 12. The rotor 13 and a self-locking gear 13o serve to drive the screw spindle 12. If the motor 13 is not working, sliding movements of the carriage 11 are blocked by the self-locking gear 13o. A self-locking gear 13o can be dispensed with, as long as a so-called brake motor is used as the motor, which allows its drive axle to rotate only when it is switched on. In the following, a movement drive with the property that the movement controlled by it is only intentionally more important is referred to as a controllable drive unit. It can also be hydraulic or pneumatic Be kind. In

a guide groove of the Schl5_ttens 11 is a second carriage * i * i sit means of a further controllable drive unit 15 in the Y-direction slide back and forth. The chute I ¹ J carries a vertical guide tube 16 in which a rack 18 is vertically adjustable up and down in the Z direction with the help of a third controllable drive unit 17.

The upper end of the rack IS is a bearing block 19 with pivot bearings 2o for a shaft 21 rotatable therein. To rotate the shaft 21 about its axis B, ä ^ n. To change the angle of rotation B ₁ , a controllable drive unit with a motor 22 «, a self-locking back gear train 22o and a gear transmission 221 is used. and the rod parts 25, 26, which are oriented transversely thereto, are also parallel to each other and carry counterweights 25o, 2δο. A controllable drive unit 27 is used to change the parallelogram angle between the articulated rod parts 21 and 25 the right-hand ends of the rod parts 23, 24 are designed as GA legs, which are articulated via connecting joints 2 3o, 2 ^ o aligned with one another in pairs with a half-cylinder unit 29, which forms a parallelogram ^{extension parallel to the parallelogx 1} ^ mrastangen 25, 26. The connecting plane CC of the joints 2ifo and 23o intersects the pivot axis c of the shaft 21, or the parallel granular plane in the object location O, which is to be referred to as the open corner of the joint parallelogram 21-23-24-25-26-29.

With the half-cylinder jacket 29 is parallel to the plane; C through the joints 2 3o-24o, as the actual supporting body for the Bzno

The kxilar microscope 31 and the headrest 32 connected to it are firmly connected to a guide rod 30, in which the binocular device can be shifted by means of an adjusting wheel 33 in the direction of the object location 0 for the purpose of optical focus adjustment. In the helmet-shaped headrest 32 switches S ^, S ^ ₅ S_, S. are arranged, the construction and operation of which will be explained in more detail with reference to Fig. * I. For the time being it should only be mentioned: that they are intended to be used under the influence of head movements of the observer or the surgeon

Pivoting movements of the binocular microscope 31 around the axis B and in the pivotable plane C around the object location 0 as a rotational axis or translational displacements of the object. ortes 0 to trigger in one of several of the directions X, Y, Z on the corresponding controllable drive units.

Kit ¹ Jo is a cheration table on a base Ul designate. A patient 42 is shown on the operating table, on whom a brain operation is to be carried out at point O. The binocular microscope 31 is adjusted to this point O. A pedal switch SP is arranged on the floor and shown in FIGS. His switch arm can be set to one of three positions D, F »T (Fig, 3, U) with the foot of the observer. In the basic position of the switch SP it blocks all displacement movements of the binocular microscope 31. In the position D it allows rotary movements of the binocular microscope around the set object location O, but blocks all translational movements. In the position T it blocks all rotary movements of the binocular microscope 31 around the object location O, but gives the translator! see movements of the bearing block 19 and thus of the Objektörtes 0 in the X, Y and Z directions freely.

-S-

-Ln rig- h are three motors, Hx ₃ My, Mz for controlling the * translatory displacements of the * rack 18 or the bearing block 19 for the vJelle 21 of the joint paralielogramines of FIG. 2 in the X, bz>;. Y or Z directions and two

Motors H_ and Hy- to · control the rotary movements of the Ii ö -

i binocular microscope 31 uia the set object location 0

drawn. For controlling these motors buttocks serve Fig. 4, four · secured to the headrest 31 switches S _1, 5 = S_, S ^ _1, and the pedal switch ~? next to the three positions D ₃ Γ, T. The primary winding U _{1 of} a transformer U is connected to an alternating current. At the output terminals of its secondary winding U_, which is symmetrical with respect to earth, V / AC voltages V bzt-7 in phase opposition to one another arise. R. vienn the? Edal switch S? is in the rest position shown *, none of the hot ren can be put into operation by applying the voltage V or R, because their current paths to the Kittelabgriff of the winding U ₂ remain interrupted. In the position T of the switch SP the three transition motors Kx, Hy, Hz are connected with their outputs a to the grounded Jüttelabgriff of the winding U ₂ and in the position D the outputs dir two rotary motors M_ and Mjt .. The switches S each have a one Axially movable pressure pin s covering Gurssi hood H so that the switch in question can be switched from the switching position shown by the greater or lesser pressure of the head against a switch of the headrest 32. The switches S ^ and S ₂ are simple on and off switches. When the head is pushed to the right to operate the switch S ₂ , the v inputs of the motors become Hx and IAy. di.e connected to voltage V (forward running), but running only effective forward, if the engine outputs are connected to the center tap of the winding U. ₂ Conversely, pressing the head to the left causes the switch S ₁ to be actuated, ie the connection of the r inputs of the relevant

Jb

Motors U% b & w- Uu to the voltage R (reverse rotation).

« T

f 4

The switches S ₃ and S ^ are double-pole changeover switches which remain in the drawn off position due to the influence of a medium pressure force, when the pressure force increases they apply a voltage V to the inputs of the controlled motors and when they become smaller of the contact force «ie Gegeöykasige SpÄis ^ ssg H zst dis r-iüngäiige of the controlled Kotoreni« It is easy to see that the switch

S ₃ "c € T from the bottom of the skull of the observer j, cross-curvature of the headrest 32 protrudes, the Motor" 2 for the Vertikalbeteegung <Z direction) of the bearing block for the "parts 21 of the G" lenkparal * welQgraaar it The switch S is arranged in FIG. 2 on the inside of the headrest recess resting on the forehead of the observer, and is shown folded down in FIG.

It goes without saying that there are many others in the satchels of the Invention falling K-opportunities to realize the provided 2ie! E conceivable. So it can 2.3. be advantageous for the rotary movements of the observation device in the head flow 32 aji position of switch term for yes-no, or forward stylist: ancs - ?. ück «lrt: ssteuerissg a / malog control variable to be provided for servo motors, or ζ “3. for the Drehbeveöungen to arrange special controls in the headrest.

To speak: Io -

Claims (7)

- Io - Protection claims ! Adjustable stand for an optical observation device _9, characterized in that a headrest (8, 32) is mechanically connected to the observation device (8, 31) aside that in the headrest there are control elements (S) for initiating the drive (H) of tripod parts are arranged in such a way that, depending on the corresponding head movements relative to the control elements of the headrest _, movements of the observation device can be triggered in corresponding degrees of freedom via the controllable drive units. 2. Adjustable stand according to Claiml, preferably for a binocula: microscope, characterized in that ^; the observation device (6, 31) can be set to an object location (O) that can be adjusted translationally relative to the stand in at least one coordinate direction X, Y, Z) and in this setting by the influence of head movements of the observer on the initiation of the observation device (8, 31 ) mechanically connected headrest (8, 32) can be pivoted around the set object location (0) as the center of rotation in at least one direction of rotation * 3. Stand according to claim 2, characterized in that a device carrier (5, 3o), on V7elchem the observation device CS, 31) together with the headrest (8, 32) for optical focusing on the object location (0) is adjustable in the observation direction is pivoted _{about two axes of rotation (A ^, Α ς} ) oriented at an angle to one another and directed towards the object location (0). ; - 11 - - Λ Λ - 4. Stand according to claim 2 or 3 _S dacirrch gekeimzeich— Hex that the * equipment carrier * ιξξϊ a pivot bearing (2) directed at the Objekxort CO) can be pivoted in a »Hinkelaria (3) and that the · Vfinkelana (3) xsz. a likewise on the obiektrori: gex * icht: e1: it rotation positioni? (U) in a following are at least one · coordination (X ₃ Y, Z) "cr-anslaTor'isch ver ^ sxeilbar ^ en Sxaiider * - xeil (1) shiftable * isx. 5. Sxaxiv according to claim 3, characterized in that y the »Geräxexräger · (23, 3o) a Seixentreil (29) a joint parallelogransies bildex _s the» is always directed to an open tip of the Farallelogranrnies that defines the object: (0) and its open corner is pivotable in the parallelography plane iua. 6. Stand according to claim 5, characterized in that the Parallelogranmebene a 's support part is pivotable about a likewise always directed towards the said open area and a side portion of the parallel linkage forming axis (21) in bearings ί2οΛ (19). \ 7. Stand according to claim 2 or 3, characterized in that that the rotational movements of the device carrier (7, 3o) ukj its set Öbjektort on the one hand and the movements to Moving the object location (0), on the other hand, can be prevented or released jointly by group-wise controllable locking devices are. The patent attorney