DE102017100056A1 - Video endoscope with swiveling viewing direction and handle for a medical shaft instrument - Google Patents

Abstract

The invention relates to a video endoscope (10) with a pivotable viewing direction, comprising a handle (12) with an operating element (14) for pivoting the viewing direction, a shaft tube (18) fastened to the handle (12) distally with a viewing window (16). which defines a hermetically sealed space (22) extending into the handle (12), a control element (28) movably mounted in a space (24) between a housing wall (26) of the handle (12) and the hermetically sealed space (22) ) to which a first magnetic coupling element (30) is arranged, which interacts with a second magnetic coupling element (32) arranged in the hermetically sealed space (22) in such a way that the first and the second magnetic coupling elements (30, 32) comprise a magnetic coupling for contactless transmission of Form rotational and / or translational movements, wherein the adjusting element (28) rotatably about a longitudinal axis (L1) of the handle (12) rotatable and / or tra nslatorisch parallel to a longitudinal axis (L1) of the handle (12) slidably in the intermediate space (24) is mounted, and wherein on the adjusting element (28) a rack (34) is arranged, arranged with one in the intermediate space (24) Gear (36) cooperates, that a rotation of the gear (36) the adjusting element (28) positively driven in a rotational movement and / or in a translational movement relative to the hermetically sealed space (22) drives. Furthermore, the invention relates to a handle for a video endoscope according to the invention.

Description

The invention relates to a video endoscope with adjustable viewing direction according to the preamble of claim 1 and a handle for a shaft instrument according to the preamble of claim 14.

In video endoscopes with a pivotable or bendable viewing direction, a distally arranged rotatable prism in a classical construction. The rotation of the prism arranged in the distal end region of the endoscope shaft is typically carried out by means of translatory displacement of an actuating element arranged in the shaft. The translational body displaceably mounted axially parallel to a longitudinal axis of the shaft is usually coupled in the distal region to a transmission which translates a translational movement into a rotational movement.

Since the rotation of the prism usually also results in a twisting of the horizon position with respect to the endoscope shaft, the user of the endoscope would have to rotate the shaft during the rotation of the prism in order to obtain a consistent horizon orientation in the image data displayed on a display device. However, a manual rotation of the endoscope shaft is not possible or undesirable in many situations of use, which would lead to the rotation of the displayed image without suitable measures. When the horizon position is rotated or the shaft rotation is not performed synchronously, a spatial disorientation may occur in the observer of the endoscope image data, which is triggered by an unexpected horizon position twist on the image reproduction devices connected to the endoscope.

This problem is encountered in the prior art with different approaches. One possibility is, for example, in a purely electronic correction of the horizon position in the image data recorded with the image sensor of the video endoscope. For this purpose, the endoscope is equipped with acceleration sensors which detect the position of the endoscope shaft so that a correction in the electronic image data can be made by linking the position data of the endoscope shaft and the selected viewing angle position.

Another possibility for the automatic horizon position compensation is to turn the electronic image sensor in synchronism with the rotation of a distally arranged prism. The rotation of the prism and the rotation of the image sensor are coordinated so that the horizontal orientation shown on the image display devices is displayed consistently at a rotation of the viewing angle determining prism. Out DE 10 2012 202 552 A1 For example, it is known to arrange for a mechanical compensation of the horizon position within the shaft tube, a translational body and a rotary body, which serve on the one hand to rotate the prism and on the other hand to rotate the image sensor. This adjusting system is operated by a rotary handle arranged on the handle of the video endoscope. Upon actuation of the rotary handle, a rotational movement is transmitted contactlessly into the shaft space with the aid of a magnetic coupling. In the shaft space, the rotational movement transmitted by the handle is converted by means of a transmission into a rotational movement for rotation of the image sensor and a translatory movement for rotation of a prism determining the viewing direction. The transmission required for the conversion of the rotational movement into a translational displacement and a rotational rotation has a high component complexity and must be highly miniaturized because of the very limited space available in the shaft. Such transmissions are very expensive to produce. Even the smallest manufacturing tolerances can lead to hakeligen rotational movements of the optical elements or even failure of Verdrehmöglichkeit. In addition, with the complexity of the transmission, the mechanical efficiency deteriorates, so that with the upstream magnetic coupling relatively high rotational forces must be transmitted, which in turn increases the risk of slippage of the magnetic coupling.

The invention is based on the object to provide a video endoscope with adjustable viewing direction with simultaneous horizon position compensation, which is characterized by a reduced component complexity and reduced manufacturing costs.

This object is achieved by a video endoscope with the features of claim 1. A significant contribution to the solution also provides the inventive handle with the features of claim 14th

According to the invention, a video endoscope with a pivotable viewing direction, comprising a handle with an operating element for entanglement of the viewing direction, a shaft tube fixed to the handle and distally closed with a viewing window, which delimits a hermetically sealed space extending into the handle, extends in an intermediate space between a housing wall of the handle and the hermetically sealed space movably mounted actuator on which a first magnetic coupling element is arranged, which cooperates with a arranged in the hermetically sealed space second coupling element such that the first and the second magnetic coupling element form a magnetic coupling for non-contact transmission of rotational and / or translational movements, and wherein the actuating element is rotatably mounted about a longitudinal axis of the handle rotatably and / or translationally parallel to a longitudinal axis of the handle displaceable in the intermediate space, and wherein a rack is arranged on the adjusting element, which interacts with a toothed wheel arranged in the intermediate space in such a way that a rotation of the toothed wheel forcibly drives the adjusting element into a rotational movement and / or a translational movement in relation to the hermetically sealed space.

As a significant advantage is considered in this invention that can be dispensed with the installation of a complex gear in the hermetically sealed space of the shaft. So far, it has been necessary to convert a first type of movement transmitted by a magnetic coupling into the hermetically sealed space for driving a two-part control system within the shaft into two different types of movement. So far, a built in the hermetically sealed room complex gear unit was used for it. The force required in such gear conversions, which is transmitted in generic shaft instruments by a magnetic coupling, creates a not negligible slip in the adjustment of the line of sight and it is the highest demands on the error tolerances of such a transmission necessary to a hakelige or completely failing viewing angle adjustment avoid.

In the construction according to the invention, both a translational movement and a rotational movement with a highly complexity-reduced transmission can be transmitted via a single magnetic coupling. In the interior of the shaft, the transmitted movements can be easily translated into a displacement or rotation of the elements of a control system for the rotation of optical components or the like. The construction according to the invention reduces the production costs and thus the production costs of a video endoscope.

In principle, it is conceivable to design the gear construction arranged outside the hermetically sealed space in the region of the handle also for the sole transmission of a translation or rotational movement by means of the provided magnetic coupling. For example, the rack arranged on the adjusting element can be aligned real parallel and not skewed to a longitudinal axis of the handle or the shaft. Upon rotation of the gear, it is thus only an axial displacement of the actuating element and the first magnetic coupling element arranged thereon. For the transmission of only one rotational movement, the toothed rack can be aligned at a right angle askew to a longitudinal axis of the handle or of the endoscope shaft. Upon rotation of the gear thus creates a pure rotational movement of the actuating element and the first magnetic coupling element arranged thereon.

Preferably, however, the rack according to the invention is skewed to a longitudinal axis of the handle or the endoscope shaft arranged such that rotation of the gear leads both to a translational and to a rotational movement of the actuating element and arranged thereon the first magnetic coupling element.

To form the in a space between a housing wall of the handle and the hermetically sealed space movably mounted actuating element is conceivable sleeve or tubular piece, in particular circular cylindrical form and arrange in the region of the handle, that there is a housing wall of the hermetically sealed room in Surrounds the circumferential direction. The adjusting element is preferably mounted in the intermediate space in such a way that it can be rotated at least in regions around the hermetically sealed space and / or is displaceable axially in the direction of a longitudinal axis of the handle or of the shaft tube.

With respect to the magnetic coupling is thought that the first and / or the second coupling element of the magnetic coupling is designed as a permanent magnet or electromagnet.

In one embodiment, it is envisaged that the gear arranged in the intermediate space according to the invention is rotatably mounted on the handle, in particular about an axis oriented transversely to the axis of rotation of the actuating element. Preferably, the gear is rotatable and otherwise immovable relative to the hermetically sealed space in the intermediate space of the handle. In a modification, it is also conceivable that the rack gear driving the rack according to the invention is mounted axially displaceable along its axis of rotation, for example, to allow assembly steps or functional changes. In this regard, it is also conceivable to mount the gear in the axial direction with respect to a longitudinal axis of the handle or the endoscope shaft slidably.

In a first variant, it is envisaged that the gear driving the adjusting element and the rack arranged on the adjusting element form a classic rack and pinion gear. It is thought that the gear as a spur gear, so as a toothed on its circumference cylindrical disc or a toothed shaft at its periphery. Without limiting the idea of the invention, one or more than one further toothed wheel, in particular a spur gear, can also be arranged between the driven toothed wheel and the toothed rack. These other gears can be used for example for speed translation.

In a preferred external design is thought that the rack geometry is at least partially circumferentially arranged on the lateral surface of the preferably designed as a cylinder actuator. In particular, with an integral design of the rack with the actuator can be provided to produce the rack geometry, for example by laser cutting or by injection molding.

In order to enable a rotation of the actuating element to the hermetically sealed space, the rack is not arranged in the longitudinal direction of the actuating element, ie not really parallel to the axis of rotation of the actuating element but skewed at a fixed angle to the axis of rotation of the actuating element. If the gear according to the invention is rotated in this helical orientation of the rack in engagement with the same, the actuator is also set in rotation. In a skewed arrangement of the rack, not perpendicular and not really parallel to the axis of rotation of the actuating element, the actuator is brought in a rotation of the gear both in a rotational movement and in a translational movement with respect to its axis of rotation.

By selective selection of the diameter of the control element designed as a cylinder, the angle of the rack and the size of the gear driving the actuator, a coordinated Blickwinkelverschwenkung be achieved with simultaneous horizon position compensation. The targeted selection of the parameters determines the relationship between the translational movement and the rotational movement of the control element.

As mentioned, the adjusting element according to the invention can be designed with the rack disposed thereon as a cylinder and in particular as a hollow cylinder. This is particularly appropriate to create space in the space between a housing inner wall of the handle and the hermetic space for other components of the handle.

In a particularly space-saving embodiment, it is envisaged that the adjusting element is designed as a hollow cylinder and that the rack has a thickness which is smaller than or equal to the wall thickness of the tubular hollow cylinder. Thus, the rack can be arranged on the front side or in a recess between the inner wall and the outer wall of the actuating element without a part of the rack protrudes beyond the outer or inner lateral surface of the actuating element.

From the concept of the invention it is understood that the rack is formed in the classical form with a straight or oblique frontal toothing. It is also conceivable that the rack is formed like a chain of links with the length successively arranged recesses, engage in the complementarily shaped teeth of the gear.

With regard to the design of the magnetic coupling, it is envisaged to firmly connect the first movement-coupled magnetic coupling element to the setting element and / or to form it integrally with the setting element.

In a previously mentioned advantageous embodiment, it is contemplated that the rack is oriented and cooperates with the gear such that rotation of the gear drives the actuator forcibly guided in a helical motion about the hermetically sealed space. The helical movement of the actuator is generated by a superposition of axial displacement and rotation of the actuator.

More preferably, it is contemplated that the gear can be brought into rotation by means of actuation of the operating element arranged on the handle. The control element may comprise a classic rotary ring or a rotary knob, with which the actuating element driving the gear is rotated directly or indirectly, for example by transmission. It is also conceivable a slider element, which is mounted in the axial direction along a longitudinal axis of the handle or the endoscope shaft slidably on the handle, with which the gear, in particular by means of a transmission, is rotated. Furthermore, alternatively or additionally, an electric motor drive for rotation of the gear can be provided, which is controllable by means of actuation of the operating element. To translate an actuating movement of the operating element or the drive movement of an engine, of course, a transmission between the actuating element driving the gear and the movable part of the operating element or the motor drive can be provided.

In a further advantageous embodiment it can be provided that the video endoscope is designed and set up in such a way that by means of the magnetic coupling a translational displacement of the actuating element outside of the hermetically sealed space is translated into a rotational movement of a disposed within the hermetically sealed space prism and / or that a rotational movement of the actuating element outside the hermetically sealed space is translated into a rotational movement of an arranged inside the hermetically sealed electronic image sensor.

This embodiment is directed to the classical construction of a video endoscope with a pivotable viewing direction in which a first optical assembly comprises a rotatably arranged prism in the distal region of the shaft, wherein the light of the space observed with the endoscope passed through the first optical assembly is directed to a proximally to the first optical assembly arranged rotatable electronic image sensor meets.

In principle, it is conceivable that the rack according to the invention is attached as a separate component to the actuator. According to an advantageous variant, however, it can be provided that the toothed rack is formed integrally with the adjusting element. This integral design can be achieved on the one hand by an injection molding or, for example, by cutting the rack geometry from the actuator body.

In a preferred embodiment, it is contemplated that the rack is arranged in a recess of the actuating element. In a skewed orientation of the rack, the teeth of the rack may point in the proximal or distal direction, ie with a directional component in the proximal or distal direction. The recess may be a gap-shaped recess or an opening in a housing wall of the actuating element. The recess may be formed at a distance from the distal and / or front end of the adjusting element. Alternatively, the recess may be arranged on the distal or proximal end side of the actuating element. Preferably, the recess extends helically in a peripheral region about the axis of rotation of the actuating element.

In the manner already mentioned, in a concrete embodiment it is contemplated that the rack is arranged helically with respect to the axis of rotation of the adjusting element on the adjusting element. This helical orientation of the rack is facilitated when the actuator is circular cylindrical.

To ensure that the rack driving the gear in an operating position of the video endoscope in each achievable by means of a rotation of the gear movement position of the actuating element remains in engagement with the rack, various possibilities are conceivable.

In a preferred variant, it is envisaged that in the intermediate space, a guide system is arranged, which is designed and arranged such that in an operating position of the video endoscope, the rack in each achievable by means of rotation of the gear movement position of the actuating element is in engagement with the gear.

In a simple variant, the guide system can be formed in the tongue and groove principle, wherein, for example, a guide pin arranged on the actuating element runs in a guide groove arranged on an inner housing wall of the handle and / or on the outer wall of the hermetically sealed chamber. Of course, it is also conceivable to arrange a guide pin stationary on an inner wall of the handle and / or on the housing wall of the hermetically sealed space, which runs in a guide groove formed on the actuating element. The groove is really aligned parallel to the rack line, so that the distance between the gear and rack remains largely or completely unchanged during a movement of the actuating element. It can also be provided that, during a movement of the actuating element, a guide pin arranged stationary on a housing wall of the handle or the hermetically sealed space slides free of backlash or clearance at an edge on the side of the recess opposite the rack geometry, thereby pressing the gear against the rack. For a gap-poor running of a guide pin on a sliding edge in the recess of the actuating element, the sliding edge should be at a distance really parallel, so neither converging nor skewed be formed to the rack line.

An operating position of the video endoscope, in which the gear is to remain in engagement with the rack, is an operating mode of the video endoscope, in which a pivoting of the viewing direction is provided with simultaneous horizon position compensation. In particular, for maintenance and / or installation work and any function changes can be provided that the gear can be brought out of engagement with the rack.

In a further advantageous embodiment, it is contemplated that the adjusting element is mounted spring-biased in the intermediate space, that in a position of operation of the video endoscope, the rack is spring-loaded in each attainable by means of rotation of the gear movement position of the actuating element in engagement with the gear. Alternatively or additionally, it may also be provided that this is the actuating element driving gear in the axial direction along the axis of rotation of the actuating element is spring-biased, so that the gear is spring-loaded against the rack is pressed.

Alternatively or additionally, it may further be provided that a guide element cooperating with the actuating element and with the body of the handle is arranged in the intermediate space, which in an operating position of the video endoscope engages the rack in each movement position of the actuating element that can be achieved by rotation of the toothed wheel forces the gear. As already briefly indicated, this may for example be a fixed in the body of the handle guide pin which runs in a groove of the actuating element or vice versa or between actuator and hermetically sealed space. However, it is also conceivable, for example, the arrangement of a second gear which engages in a second rack opposite the first rack, wherein the second gear is freely rotatably mounted on the hermetically sealed space or the handle and is not driven. The second rack follows the course of the first rack, so that a largely constant distance between the driven gear and the rack according to the invention is ensured similar to the illustrated tongue and groove principle. In a formation of opposing racks in a common recess on the actuator must be taken to ensure that the actuating element driving the first gear and it in engagement with the first rack compelling second gear do not touch, since the gears in this construction occupy an opposite direction of rotation and otherwise would block.

In one embodiment, it is contemplated that the video endoscope further includes a first optical assembly disposed distally within the shaft tube, having a first prism disposed rotatably, and a second optical assembly having a rotatably mounted electronic image sensor disposed proximate the first optical assembly within the shaft tube and wherein the second magnetic coupling element is coupled in motion with a control system arranged in a hermetically sealed space, which comprises a rotational body rotatable about a longitudinal axis of the shaft tube and / or a translational body axially displaceable parallel to a longitudinal axis of the shaft tube, wherein the magnetic coupling generates a rotational movement of the toothed wheel Rotational movement of the actuating element translated into a rotation of the rotary body and / or a translational movement of the actuating element generated by rotation of the gear in an axial displacement of the Translati onskörpers translated.

Specific embodiments of such a control system with a translational body and a body of revolution, for example, the application DE 10 2012 202 552 A1 which is expressly referred to for this purpose. Other construction details of the video endoscope according to the invention or the embodiments explained hereto can also be used according to FIG DE 10 2012 202 552 A1 be executed. Again, this document is expressly referenced.

In another embodiment, it is contemplated that the translational body is coupled to a gear that translates axial displacement of the translational body into rotation of the first prism. In a typical arrangement of the first optical assembly, the pivotally mounted first prism is rotatable about a rotational axis oriented transversely to a longitudinal axis of the shaft. In particular, it makes sense to implement an axial displacement of the translational body with a gear in a rotational movement, since this, for example, an axially displaceable rack in engagement with a motion-coupled with the pivotable prism gear segment sufficient.

In a further embodiment, it is contemplated that the image sensor is coupled in a movement-connected manner to the rotation body, which leads to a rotation of the rotation body to a rotation of the image sensor. In a simple variant of the image sensor can be rotatably mounted on or in a shaft rotatably mounted in the sheath tube, which can be brought directly or indirectly from the magnetic coupling in rotation.

According to the invention further comprises a handle for a medical shaft instrument, in particular for a video endoscope, wherein the handle has a movably mounted adjusting element, on which a first magnetic coupling element is arranged, which cooperates with a projecting in a handle shaft body interior second magnetic coupling element such that the first and the second magnetic coupling element form a magnetic coupling for non-contact transmission of rotational and / or translational movements, and wherein the actuating element is rotatably mounted rotatably about a longitudinal axis of the handle and / or translationally parallel to a longitudinal axis of the handle, and wherein the actuating element a Rack carries, which cooperates with a rotatably mounted on the handle gear arranged such that a rotation of the gear, the actuator forcibly guided in a rotational movement and / or in a Translatio nsbewegung against the protruding into the handle shaft body interior drives.

Advantages, details and embodiments of the handle according to the invention also result from the above-explained advantages, details and embodiments of the video endoscope according to the invention.

• 1 eine schematische Seitenansicht eines erfindungsgemäßen Videoendoskopes,
• 2 eine schematische Schnittdarstellung durch einen erfindungsgemäßen Handgriff,
• 3 eine schematische Schnittdarstellung eines distalen Schaftabschnittes eines erfindungsgemäßen Videoendoskopes,
• 4 eine schematische Schnittdarstellung durch einen erfindungsgemäßen Handgriff mit dargestellter Antriebseinheit des erfindungsgemäßen Stellelementes,
• 5 die Komponenten eines erfindungsgemäßen Handgriffes gemäß 4 in einer ersten Betätigungsstellung,
• 6 die Komponenten eines erfindungsgemäßen Handgriffes gemäß 4 in einer zweiten Betätigungsstellung,
• 7 eine schematische Draufsicht auf eine optische Baugruppe bestehend aus einer Prismeneinheit und einem Bildsensor,
• 8 eine Seitenansicht der optischen Baugruppe aus 7 in Richtung der Sichtlinie 8 - 8, und
• 9 eine schematische Darstellung der optischen Baugruppe aus 8 mit einem verschwenken Prisma der Prismeneinheit.

Further advantages, features and details of the invention will become apparent from the embodiments described below and with reference to the drawings. Show it:

• 1 a schematic side view of a video endoscope according to the invention,
• 2 a schematic sectional view through a handle according to the invention,
• 3 a schematic sectional view of a distal shaft portion of a video endoscope according to the invention,
• 4 a schematic sectional view through a handle according to the invention with illustrated drive unit of the actuating element according to the invention,
• 5 the components of a handle according to the invention 4 in a first operating position,
• 6 the components of a handle according to the invention 4 in a second operating position,
• 7 a schematic plan view of an optical assembly consisting of a prism unit and an image sensor,
• 8th a side view of the optical assembly 7 in the direction of the line of sight 8 - 8, and
• 9 a schematic representation of the optical assembly of 8th with a swiveling prism of the prism unit.

In the drawings, the same or similar elements and / or parts are provided with the same reference numerals, so that apart from a new idea in each case.

1 shows a schematic side view of a video endoscope 10 according to the invention with a proximal handle 12 and a rigid endoscope shaft 18 , the distal with a viewing window 16 is closed. The viewing window 16 is dome-shaped or dome-shaped in the present embodiment. Thus, for example, space can be created for a mechanical rotation of optical components in the distal shaft area 20 are arranged. In addition, a dome-shaped window offers ample space for the observation of areas of the examination room located laterally to the endoscope tip.

The change of the viewing direction of the video endoscope 10 can in the present embodiment by pressing one on the handle 12 arranged control element 14 be effected. In an embodiment explained in more detail below, upon actuation of the operating element 14 the rotational position of one in the distal section 20 of the endoscope shaft arranged prism 38 to be changed.

The operating element 14 includes in the example shown a trained as a rotary knob control panel. Without further measures it can also be provided that the operating element 14 a rotary ring, a lever element, a slider element or a button for adjusting the viewing direction and / or for setting other functions of the video endoscope 10 includes.

2 shows a highly schematic longitudinal section through an area of a handle according to the invention 12 , For the sake of clarity and without limiting the scope of the invention, only those components are schematically indicated in this illustration, which support the understanding of the invention. The 2 schematically shows a housing wall 26 the handle 12 according to the invention with a in a cavity of the handle 12 extending into hermetically sealed space 22 from a housing wall 62 is limited. The housing parts are shown cut off in the distal and in the proximal direction in order to be able to present details of the handle which are important to the invention.

In a gap 24 between the housing wall 26 and the wall 62 hermetically sealed room 22 is a presently cylindrical actuator formed 28 arranged. On the actuator 28 is a first magnetic coupling element 30 arranged. In the present embodiment, the magnetic coupling element 30 in the wall material of the actuating element 28 incorporated. For example, the magnetic coupling element 30 in an injection molding process of wall material of the actuating element 28 to be splashed.

At the proximal end of the actuator 28 is a - shown here as a helical spring - spring element 70 arranged, which is the actuator 28 Federkraftschlagt presses in the distal direction. In the present case is the actuator 28 axially in the direction of the longitudinal axis L1 of the handle 12 slidable in the space 24 between the hermetically sealed space 22 and the housing wall 26 arranged the handle 12. As can be seen in the following figures, the movement of the actuating element 28 by a drive unit which rings in detail below, consisting of a toothed rack 34 and one of the housing 12 worn gear 36 , certainly. As also further explained below, the actuator can 28 axially displaceable and / or about a longitudinal axis L1 of the handle 12 rotatable in the gap 24 be arranged.

In a rotational or translational movement of the actuating element 28 in the gap 24 concerning the hermetically sealed room 22 exercises the first magnetic coupling element 30 a magnetic force on a second magnetic coupling element arranged in the hermetically sealed space 22 32 out. The second magnetic coupling element 32 follows the movement of the control element 28 or the first magnetic coupling element arranged thereon 30 , The magnetic coupling elements 30 and 32 form a magnetic coupling, the movement forces contactlessly from an area outside the hermetically sealed space 22 in the hermetically sealed room 22 transferred into it. This is the hermetically sealed room 22 effectively protected against external influences such as moisture or contamination, so that the instrument can be autoclavable, for example, without endangering sensitive optical or electronic elements inside the shaft.

In a simplistic representation is in the hermetically sealed room 22 exemplified a construction for receiving and transmitting rotational and translational forces. That in the hermetically sealed room 22 arranged second magnetic coupling element 32 takes on a movement of the actuating element 28 that with the first magnetic coupling element 30 transmitted forces and translates this, for example, in a rotation of a body of revolution 68 or an axial displacement of a translational body 66 , The rotating body 68 serves for example for rotation of an electronic image sensor 40 ( 3 ) and the translational body 66 serves, for example, the rotation of a prism 38 ( 3 ).

It can be provided that the rotational body 68 exclusively rotational forces of the magnetic coupling ( 30 . 32 ) should record. Furthermore, it can be provided that the translation body 66 excluding translational forces of the magnetic coupling ( 30 . 32 ) should record. In order to allow an axial displacement of the second magnetic coupling element 32, without the rotary body 68 can turn, for example, a guide pin 58 with the second magnetic coupling element 32 be motion coupled, in a guide groove 60 of the rotational body 68 running. With an axial displacement of the second magnetic coupling element 32 Thus, no axial displacement forces on the rotary body 68 transmitted but only rotational forces. Axial forces acting at friction of guide pin 58 in the guide groove 60 can be transferred, for example, be absorbed by a rotary bearing of the rotating body.

To transmit an axial movement on the translational body, a thrust element 64 in such a way with the second magnetic coupling element 32 be motion coupled, that there is an axial movement of the second magnetic coupling element 32 positively guided follows and during a rotation of the second magnetic coupling element 32 its rotational position with respect to the axis of rotation of the second magnetic coupling element 32 maintains. For example, the thrust element could 64 with a sliding or rolling bearing on a housing part of a second magnetic coupling elements 32 bearing housing rotatably mounted. The push element 64 is in this example with the translational body 66 motion coupled, so that an axial displacement of the second magnetic coupling element 32 to one with the pusher element 64 mediated axial movement of the translation body 66 leads.

3 shows a highly schematic of a possible construction of in the distal end portion 20 of the endoscope shaft 18 arranged optical and electronic elements for image transmission. In the distal area 20 can be a first optical assembly 44 and a proximal optical assembly 46 be arranged. The first optical assembly preferably consists of a first prism 38 that is, in particular, transversely to a longitudinal axis L2 of the endoscope shaft 18 extending axis of rotation A is pivotally mounted. The first optical assembly 44 can also have a second prism 54 and a third prism 56 include. The rotatably arranged first prism 38 serves to adjust the viewing angle of the video endoscope 10 ,

That with the first prism 38 recorded light of the examination room is by means of the second prism 54 and the third prism 56 in the proximal direction to an electronic image sensor 40 the second optical assembly 46 forwarded. In addition to the electronic image sensor 40 For example, the second optical assembly may also include other optical elements, such as one or more lenses.

In the present construction, it is provided that an axial displacement of the translation body 66 in one of the directions C to a rotation of the first prism 38 around its axis of rotation A leads. This is the translational body 66 present distally equipped with a rack, which in a on a rotary housing 72 trained gear segment engages. This from the rack of the translational body 66 and the gear segment of the rotary housing 72 trained gear translated translational movement of the translation body 66 along a longitudinal axis of the endoscope shaft 18 in a rotational movement of the rotary housing 72 motion-coupled first prism 38 around a transverse axis of the endoscope shaft 18 ,

4 shows highly schematized and simplified illustrated some important for understanding the invention important components of the handle 12 , While the housing wall 26 of the handle 12 and the housing wall 62 hermetically sealed room 22 are shown cut, is the present circular-cylindrical actuator 28 shown in side view. The adjusting element 28 surrounds the hermetically sealed room 22 sleeve-like and is in the example shown both axially displaceable and Rotartorisch rotatable relative to the hermetically sealed space 22 in the gap 24 arranged.

The actuator 28 includes a recess in its housing wall 42 in which a rack 34 is formed with teeth pointing in the distal direction. The rack 34 is space-saving in the wall of the here circular cylindrical actuating element 28 incorporated, so no parts of the rack 34 project beyond the surface of the outer and / or inner wall of the actuating element. In an arrangement of the rack 34 in the wall of a circular cylindrical control element 28 the rack is curved to the contour of the actuating element 28 to follow. A not shown in detail on the handle 12 , in particular on the housing wall 26 the handle rotatably mounted gear 36 is engaged with the rack 34 , For example, with the control 14 of the handle 12 ( 1 ) caused rotation of the gear 36 leads to a - as described in more detail in the following figures 5 and 6 - forcibly guided movement of the actuating element 28 , In a rest position in which the gear 36 is unpowered, is the Stellement 28 in the example shown by a coil spring 70 spring-biased in the distal direction. Thus, the gear remains 36 engaged with the rack 34 , In this rest position, the actuator remains at its with a rotation of the gear 36 set position in the gap 24 , Instead of a helical spring, other, for example, rubber-like or deviating from the shape of a helical spring spring elements may be provided. On the spring element 70 can also be dispensed with, as explained in detail in the above part of the description.

The 5 and 6 show the movement of the control element 28 during a rotation of the gear 36 , Due to the skew orientation of the recess 42 opposite the longitudinal axis L1 of the handle 12 becomes the control element 28 during a rotation of the gear 36 both around the hermetically sealed room 22 rotates around and axially with respect to the axis of rotation of the actuating element 28 postponed. The 5 shows in particular that during a rotation of the gear 36 in the direction of rotation Z1 , in this case counterclockwise, the rack 34 and the associated actuator 28 in the direction R1 around the hermetically sealed room 22 rotated around and in the proximal direction T1 is moved. The superposition of the translational and rotational movement leads to a helical movement of the adjusting element 28 and the movement-coupled first magnetic coupling element 30 around the hermetically sealed room 22 around. As in 6 illustrates is the movement of the actuator 28 reversible with a change in the direction of rotation of the gear 36. With a rotation of the gear 36 in the direction Z2 , in the clockwise direction, becomes the actuator 28 in the distal direction T2 shifted and thereby in the direction of rotation R2 around the hermetically sealed room 22 rotates around.

During the displacement of the element 28 in the proximal direction, the coil spring 70 is compressed and at an axial displacement of the actuating element 28 in the distal direction, the coil spring relaxes 70 axially, each in the distal direction against the actuator 28 suppressed. The spring element 70 forces the rack 34 thus in every movement position of the control element 28 in engagement with the gear 36 , As explained in detail in the general description, as an alternative or in addition to a spring element 70 be provided different guide elements, which the gear 36 engaged with the rack 34 to force. Mention should be made at this point, for example, a forced operation of the actuating element 28 opposite the handle 12 and / or the hermetically sealed room 22 with a tongue and groove principle.

Based on 7 - 9 becomes the relationship between a rotation of the first prism 38 the first optical assembly 44 and the necessary for the horizon position compensation rotation of the electronic image sensor 40 explained in more detail. In 7 is the first optical assembly 44 shown with a prism unit in a plan view. The light of the examination room observed with the endoscope strikes the first prism coming from a distal direction 38 and is along the simplified optical path W through the first optical assembly 44 transported.

With the first prism 38 the incident light is reflected by reflection in the direction of the second prism 54 directed and there also by means of reflections on side surfaces of the second prism 54 in the direction of the third prism 56 directed. From the proximally arranged third prism 56 the light comes in proximal direction on the proximal to the first optical assembly arranged electronic image sensor 40 , The image sensor 40 For example, a CCD (charge-coupler device) or a CMOS (complementary metal-oxide-semiconductor) sensor. Such or similar sensors useful for this purpose are well known in the art.

The 8th shows the optical structure 7 in a side view along the line of sight 8 - 8. The 9 shows the optical structure 8th with one around the axis of rotation A pivoted first prism 38 , When twisting the prism 38 around its axis of rotation A become the reflection surfaces of the prisms 38 and 54 twisted each other. Correspondingly, the horizontal position guided by the prism arrangement and finally impinging on the proximally arranged image sensor also twists. For a horizon position compensation, the image sensor 40 in a certain proportion to the rotation of the first prism about its longitudinal axis B turned. Thus, a horizontal position rotation in the images captured by the image sensor is mechanically prevented.

LIST OF REFERENCE NUMBERS

10

Videoscope

12

handle

14

operating element

16

window

18

steerer

20

distal shaft section

22

hermetically dense space

24

gap

26

Housing wall of the handle

28

actuator

30

first magnetic coupling element

32

second magnetic coupling element

34

rack

36

gear

38

first prism

40

electronic image sensor

42

Recess on the actuator

44

first optical assembly

46

second optical assembly

48

body of revolution

50

Translation body

52

transmission

54

second prism

56

third prism

58

guide pin

60

guide

62

Housing wall of the hermetically sealed room

64

pushing part

66

Translation body

68

body of revolution

70

spring element

72

rotary housing

A

Rotation axis of the first prism

B

Rotary axis of the electronic image sensor

C

Displacement direction of the translation body

L1

Longitudinal axis of the handle

L2

Longitudinal axis of the shaft

T1

Translational movement of the actuating element in a first direction

T2

Translational movement of the actuating element in a second direction

R1

Rotational movement of the actuating element in a first direction of rotation

R2

Rotational movement of the actuating element in a second direction of rotation

Z1

Rotation of the gear in a first direction of rotation

Z2

Rotation of the gear in a second direction of rotation

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

• DE 102012202552 A1 [0005, 0038]

Claims (15)

Video endoscope (10) with pivotable viewing direction, comprising a handle (12) with an operating element (14) for pivoting the viewing direction, a shaft tube (18) fastened to the handle (12) and distally closed with a viewing window (16) the hermetically sealed space (22) extending into the handle (12) delimits an actuating element (28) movably mounted in a space (24) between a housing wall (26) of the handle (12) and the hermetically sealed space (22) first magnetic coupling element (30) is arranged, which interacts with a second magnetic coupling element (32) arranged in the hermetically sealed space (22) in such a way that the first and the second magnetic coupling element (30, 32) comprise a magnetic coupling for non-contact transmission of rotational and / or or form translational movements, characterized in that the adjusting element (28) rotatably about a longitudinal axis (L1) of the handle (12) rotatable and / or translate Atorisch parallel to a longitudinal axis (L1) of the handle (12) slidably mounted in the intermediate space (24), and wherein on the adjusting element (28) a rack (34) is arranged, arranged with one in the intermediate space (24) Gear (36) cooperates, that a rotation of the gear (36) the adjusting element (28) positively driven in a rotational movement and / or in a translational movement relative to the hermetically sealed space (22) drives. Video endoscope (10) after Claim 1 characterized in that the rack (34) is aligned and cooperates with the gear (36) such that rotation of the gear (36) forcibly drives the actuator (28) into helical motion about the hermetically sealed space (22) , Video endoscope (10) after one of Claims 1 or 2 , characterized in that the gear (36) by means of actuation of the handle (12) arranged control element (14) is rotatable. Video endoscope (10) according to one of the preceding claims, characterized in that the video endoscope (10) is designed and arranged such that by means of the magnetic coupling a translational displacement of the actuating element (28) outside of the hermetically sealed space (22) in a rotational movement of an inside of the hermetically sealed space (22) arranged prism (38) is translated and / or that a rotational movement of the actuating element (28) outside of the hermetically sealed space (22) in a rotational movement of a within the hermetically sealed space (22) arranged electronic image sensor ( 40) is translated. Video endoscope (10) according to one of the preceding claims, characterized in that the rack (34) is formed integrally with the adjusting element (28). Video endoscope (10) according to one of the preceding claims, characterized in that the toothed rack (34) is arranged in a recess (42) of the adjusting element (28). Video endoscope (10) according to one of the preceding claims, characterized in that the toothed rack (34) is arranged helically with respect to the axis of rotation of the adjusting element (28) on the adjusting element (28). Video endoscope according to one of the preceding claims, characterized in that in the intermediate space (24) a guide system is arranged, which is designed and arranged such that in an operating position of the video endoscope (10), the rack (34) in each by means of a rotation of the gear (36) achievable movement position of the actuating element (28) in engagement with the gear (36). Video endoscope (10) according to any one of the preceding claims, characterized in that the adjusting element (28) is spring biased in the intermediate space (24) mounted such that in an operating position of the video endoscope (10), the rack (34) in each by means of a rotation of Gear (36) achievable movement position of the adjusting element (28) spring-biased into engagement with the gear (36). Video endoscope (10) according to one of the preceding claims, characterized in that in the intermediate space (24) with the adjusting element (28) and with the body of the handle (12) cooperating guide element is arranged, which in an operating position of the video endoscope (10). the rack (34) in each by a rotation of the gear (36) achievable movement position of the actuating element (28) in engagement with the gear (36) forces. A video endoscope (10) according to any one of the preceding claims, further comprising a first optical assembly (44) disposed distally within the shaft tube (18) having a first prism (38) disposed rotatably and a proximal to the first optical assembly (44) within the shaft tube (18) arranged second optical assembly (46) having a rotatably mounted electronic image sensor (40), and wherein the second magnetic coupling element (32) having a in hermetically sealed space (22) is arranged coupled to the movement of rotation about a longitudinal axis (L2) of the shaft tube (18) rotatable body (48) and / or parallel to a longitudinal axis (L2) of the shaft tube (18) axially displaceable translational body (50 ), characterized in that the magnetic coupling translates a rotational movement of the actuating element (28) generated by rotation of the toothed wheel (36) into a rotation of the rotary body (48) and / or a translational movement of the actuating element (28) generated by rotation of the toothed wheel (36) ) translated into an axial displacement of the translation body (50). Video endoscope (10) after Claim 11 characterized in that the translating body (50) is coupled to a gear (52) which translates an axial displacement of the translating body (50) into a rotation of the first prism (38). Video endoscope (10) after one of Claims 11 or 12 , characterized in that the image sensor (40) is motion-coupled to the rotary body (48) such that rotation of the rotary body (48) results in rotation of the image sensor (40). Handle (12) for a medical shaft instrument, in particular for a video endoscope (10), comprising a movably mounted adjusting element (28), on which a first magnetic coupling element (30) is arranged which engages with a shaft body interior projecting into the handle (12) (22) arranged second magnetic coupling element (32) cooperates such that the first and the second magnetic coupling element form a magnetic coupling for non-contact transmission of rotational and / or translational movements, characterized in that the adjusting element (28) rotatably about a longitudinal axis (L1) of the Handle (12) rotatably and / or translationally parallel to a longitudinal axis (L1) of the handle (12) is slidably mounted, and wherein the adjusting element (28) carries a rack (34), which rotatably mounted with one of the handle (12) arranged gear (36) cooperates, that a rotation of the gear (36) the adjusting element (28) forcibly guided i n drives a rotational movement and / or in a translational movement relative to the shaft body interior (22) projecting into the handle (12). Handle after Claim 14 and with one or more of the handle (12) relevant features of the Claims 1 to 13 ,

Images