EP3688506A1

EP3688506A1 - Prism holder of a surgical instrument, and surgical instrument

Info

Publication number: EP3688506A1
Application number: EP18773960.2A
Authority: EP
Inventors: Martin Wieters
Original assignee: Olympus Winter and Ibe GmbH
Current assignee: Olympus Winter and Ibe GmbH
Priority date: 2017-09-26
Filing date: 2018-09-12
Publication date: 2020-08-05
Also published as: WO2019063293A1; CN111149036A; DE102017122279A1; JP2020534934A; US20200225446A1; US11675159B2

Abstract

The invention relates to, inter alia, a prism holder (10) of a surgical instrument, in particular an endoscope, also preferably a video-endoscope, for at least one surgical instrument having a prism (14). The prism holder (10) has a casing (12) for receiving a prism (14), wherein at least one prism pressure element (18, 20) is provided which is/can be brought into contact with a pressure surface of a prism (14) that is/can be arranged in the casing (12), wherein the casing (12) has a respective opening (28, 30) for the prism pressure element/s (18, 20) and the at least one prism pressure element (18, 20) is/can be arranged in the respective opening (28, 30).

Description

Prism holder of a surgical instrument and surgical instrument

description

The invention relates to a prism holder of a surgical instrument, in particular endoscope, more preferably video endoscope, for at least one prism having a surgical instrument. Furthermore, the invention relates to a surgical instrument, in particular endoscope.

Endoscopes, and in particular video endoscopes, in which the light entering an operating field at a distal tip of an endoscope shaft of the endoscope is guided by an optical system to a proximal eyepiece or to one or more image sensors are known in various designs. Thus, there are endoscopes with a straight-ahead view, a so-called 0 ° direction of viewing, or endoscopes with a lateral direction of view, which have, for example, a lateral direction of viewing of 30 °, 45 °, 70 ° or the like deviating from the 0 ° direction of view. H here is with the above degrees of polar angle between the central Viewing axis and the longitudinal axis of the endoscope shaft meant. There are also endoscopes or video endoscopes with adjustable seitl Ier Bl ickrichtung, in which the Bl ickwinkel, ie the deviation from the straight-ahead view, is adjustable. In addition to setting the viewing angle, ie the deviation from the straight-ahead view, the viewing direction, ie the azimuth angle, can also be adjusted around the longitudinal axis of the endoscope shaft by rotating the endoscope as a whole about the longitudinal axis of the endoscope shaft.

EP 2 369 395 A1 shows an optical system for a video endoscope in which a change in the angle of view occurs in that a first prism of a prism group with three prisms arranged distally in the endoscope shaft is rotated or swiveled around a rotation axis which is perpendicular or vertical . Is transverse to the longitudinal axis of the endoscope shaft. This first prism is also called a pivot prism. The other two prisms, which define the optical beam path together with the first prism, are glued together and are not co-rotated.

The prisms are ground from glass blocks. The width of the respective glass block depends on the size of the beam path. The swivel prism is received in a swing prism holder and positioned by three abutment surfaces. The swing prism holder itself is rotatably mounted in a holder. In the design and production of corresponding prism groups or prism sets, the orientation of the prism, in particular its axis of rotation, is very important.

Furthermore, DE 1 0 2014 202 669 A1 discloses a prism holder arrangement for an endoscope with a variable viewing direction.

It is also known that in video endoscopes the image sensor or image sensor is not vertical, but is arranged horizontally to the Endoscopschaftachse. For this purpose, the image sensor is glued onto a deflection prism, wherein the light entry surface of the prism is arranged perpendicular and the light exit surface of the prism parallel to the endoscope axis. It is provided that the deflecting prism is mounted in a prism holder using adhesive.

Starting from this prior art, the object of the invention is to improve the positioning and alignment of a prism of an endoscope in a simple manner.

This object is achieved by a prism holder of a surgical instrument, in particular an endoscope, more preferably a video endoscope, for at least one prism having ch irurgisches instrument with a sleeve for receiving a prism, wherein at least one prism pressure body, which arranged with a pressure surface of a in the sleeve or prism arranged to be brought into contact or brought, is provided, wherein the sleeve each having an opening for the prism or the prism and the prism and the at least one Prismenandrückkörper is arranged or can be arranged in the respective opening.

The invention is based on the idea that a prism pressure body punctually, d .h. With a small contact surface with the pressing surface is brought into contact, so that is pressed by means of the Prismandrückkörpers against a pressing surface of the prism holder for the prism, wherein due to the punctiform contact surface between the prism pressure body and the prism, the prism is freely aligned. In this case, a pressure force on the prism in the direction of the contact surface or alignment surface of the holder for the prism via the or more prism pressure body brought. In particular, a plurality of prism pressure bodies are provided, so that in each case a plurality of pressure surfaces of the prism can be brought into contact with at least one respective prism pressure body.

If, for example, a prism has two pressure surfaces arranged perpendicular to one another, then in one embodiment of the invention it is provided that one prism pressure body is brought into contact with one pressure surface in each case so that the prism, due to the vertically aligned forces, opposes vertically aligned contact surfaces or alignment surfaces the sleeve is pressed. Here, the alignment surfaces are each arranged perpendicular to each other.

In one embodiment, it is provided that the prism pressure body has a rounded or curved contact surface facing the pressure surface of the prism. This makes it possible that a force is exerted on the prism by means of a punctiform contact between the prism pressure body and the pressing surface.

For this purpose, it is further provided that the prism pressure body is designed as a ball, in particular as a metal ball or glass ball or ceramic ball.

Preferably, the respective opening for the prism pressure body is formed as a bore in the sleeve. It is provided in particular that the opening or bore is arranged opposite an alignment surface of the prism holder for the prism in the sleeve.

In a preferred embodiment, it is further provided that when a prism is arranged in the sleeve of the prism contact body, it is fastened in the opening for the prism pressure body, in particular adhesively bonded, is or is. It is further provided according to the invention that between an alignment surface against which the prism is pressed, no adhesive between the alignment surface and the alignment surface facing side of the prism is present. In particular, the opening or bore for the respective prism pressure prism body in diameter is slightly larger than the diameter of the Prismenandrückkörpers or designed as Prismenandrückkörper ball for the prism.

Furthermore, an embodiment of the prism holder is characterized in that in the arrangement of one or the prism in the sleeve of the prism pressure body connected to the prism pressure body facing the pressure surface of the prism, in particular glued, is or is. In particular, it is provided that the prism or the prism or the balls are glued in kraftbeaufschlagten state in the arrangement of the prism in the sleeve, wherein the prism or the prism or push rod act as an adhesive gap bridging. The prism pressure body or ball-fixing adhesive gap between the prism pressure body and the opening or bore is formed circumferentially around the ball, in particular perpendicular to the bonding gap between the prism and the prism holder.

Preferably, in the prism holder two prism pressure bodies are provided for each one pressing surface of the prism, whereby a simple, precise and cost-effective positioning of the prism is achieved in the sleeve of the prism holder.

The prism is preferably in the form of a deflection prism, in particular a 90 ° prism. In addition, in one embodiment of the prism holder, it is provided that the prism has a parallelepiped-shaped section, each having two mutually perpendicularly arranged pressing surfaces for one prismatic contact body.

According to a further aspect of the invention, provision is made for a prism which has a light entry surface and a light exit surface to be arranged in the sleeve, the light entry surface of the prism being oriented perpendicular to the longitudinal axis of the sleeve and the light exit surface of the prism being aligned parallel to the longitudinal axis of the sleeve.

Preferably, an image sensor is arranged in the sleeve, wherein the image sensor is arranged parallel to the light exit surface of the prism.

The object is further achieved by a surgical instrument, in particular endoscope, with a prism holder as described above. To avoid repetition, express reference is made to the above statements.

In this case, it is further provided that the surgical instrument has a shaft which can be introduced into a body cavity of a living being, in particular endoscope shaft, the prism holder being arranged in the shaft, in particular the endoscope shaft. Preferably, the surgical instrument is designed as a video endoscope.

Further features of the invention will be apparent from the description of embodiments according to the invention together with the claims and the accompanying drawings. Erfindungsge- According to embodiments, individual features or a combination of several features may be met.

The invention will be described below without limiting the general inventive idea by means of embodiments with reference to the drawings, reference being expressly made to the drawings with respect to all in the text unspecified details of the invention. Show it:

Fig. 1 is a schematic perspective view of a

endoscope;

Fig. FIG. 2 schematically shows a front view of a prism holder for an endoscope; FIG.

Fig. 3A schematically shows a longitudinal section through the prism holder according to the in Fig. 2 shown section line A-A;

Fig. 3B schematically shows a longitudinal section through the prism holder according to the embodiment shown in FIG. 2 Schnittl shown in B-B;

Fig. 4A schematically shows a cross section through the prism holder and

Fig. 4B schematically shows a perspective view of the

Prism holder with a cross-sectional view.

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 each.

Fig. 1 shows a schematic perspective view of a Endoscope 1 according to the invention with a proximal handle 2 and a rigid endoscope shaft 3. At the distal tip 4 of the endoscope shaft 3, a viewing window 5 is arranged, behind which a distal portion 6 of the endoscope shaft is arranged, which has a prism unit, not shown, and an image sensor unit, not shown , The endoscope 1 can be designed as a video endoscope.

The viewing window 5 at the distal tip 4 is curved and asymmetrical. Thus, the viewing window 5 is formed to support a variable lateral Bl ickwinkel. A change in the viewing direction, ie a change in the azimuthal angle about the longitudinal axis of the endoscope shaft 3, is effected by a rotation of the handle 2 about the central axis of rotation or longitudinal axis of the endoscope shaft 3. The cladding tube of the endoscope shaft 3 is connected to the handle. The unillustrated prism unit at the distal tip 4 also rotates with the rotation of the handle 2.

The handle 2 has a rotary element 7 designed as the first operating element and designed as a slide 8 second operating element.

To maintain the horizon position of the displayed image, the rotary knob 7 is held on a rotation of the handle 2. This causes the image sensor inside the endoscope shaft 3 not to follow the movement.

In order to change the viewing angle, ie the deviation of the viewing direction from the straight-ahead view, the slide 8 is moved. Pushing the slider 8 distally leads, for example, to an increase in the angle of view, to retrieve the slide. Bers 8 to the proximal causes in this case, a reduction in the angle of view to the straight ahead. The operation of the slider 8 is accompanied by a rotation of the image sensor in order to maintain the horizon position of the displayed image even with a rotation of the prism unit against each other.

In Fig. FIG. 2 schematically shows a front view of a prism holder 10 for an endoscope. The prism holder 1 0 has a sleeve 1 2, which is arranged in an endoscope shaft 3 of an endoscope 1 or is on. The sleeve 1 2 has inside a cavity for receiving a prism 14. Here, the sleeve has 1 2 inside several stop surfaces 1 6, 1 7.1, 1 7.2 for the prism 14, so that the one side surface of the prism 14 is pressed against the stop surface 16 and at the same time the top of the prism 14 against the stops 1 7.1 , 1 7.2 of the sleeve 1 2 is pressed. The stops 1 7.1, 1 7.2 are arranged in a plane or alignment plane, which is formed perpendicular to the plane or alignment plane with the stop 1 6.

In order to press the top of the prism 14 against the stops 1 7.1, 1 7.2, a Andrückkugel 1 8 is provided and received in the sleeve, which is in contact with the underside of the prism 14 on the gegenüberl lying side below the prism 14. Here, the Andrückkugel 1 8 contacted the bottom and presses the prism 14 against the stops 1 7.1, 1 7.2. For positioning the prism 14 in the sleeve 1 2, a further Andrückkugel 20 seitl me is also provided so that by means of the Andrückkugel 20, which presses on the stop 1 6 opposite side against a corresponding pressing surface of the prism 14, the prism 14 laterally against the stop 1 6 is pressed.

In Fig. 3A is a longitudinal section through the sleeve 1 2 of the prism shark ters 1 0 according to the in Fig. 2 illustrated Schnittl inia AA. Fig. FIG. 3 shows a section through the prism holder 10 according to FIG. 2 drawn section line BB.

As shown in FIG. 3A, the sleeve 1 2 has a recess 22 on the underside, so that easier access to the underside to a bore 28 for the pressure ball 1 8 is thereby possible. To bring the Andrückkugel 1 8 in contact with the underside of the prism 14, a Andrückkugel 1 8 is received in the bore 28 in the sleeve 12.

By means of the Andrückkugel 1 8, the prism 14 is pressed from the bottom against the upper side stops 1 7.1, 1 7.2, which is achieved by the Andrückkugel 1 8, that a point force is exerted on the prism 14. After introduction of the prism 14 in the prism holder 10 adhesive is applied through the bore 28 on the underside of the prism 14 and the Andrückkugel 1 8 in one embodiment, wherein subsequently the Andrückkugel 1 8 is introduced. To align the prism 14, the Andrückkugel 1 8 is acted upon by a force, so that the upper side of the prism 14 is pressed against the stops 1 7.1, 1 7.2. Subsequently, the Andrückkugel 1 8 is glued to the sleeve 12 and the prism 14.

As shown in FIG. 3B, the sleeve 1 2 for receiving the Andrückkugel 20 has a bore 30 for the Andrückkugel 20, so that when the prism 14 in the sleeve 1 2 the lateral pressing surface of the prism 14 is brought into contact with the Andrückkugel 20, and by means of the Andrückkugel 20, the prism 14 is pressed against the stop 1 6. To fix the prism 14, the pressure ball 20 by introducing an adhesive over the punctiform contact surface with the prism 14 and the sleeve 1 2 glued in the bore 30.

The prism 14 is designed as a deflection prism having a cuboid-shaped section, wherein the light entry side 34 is arranged in a vertical plane to the longitudinal axis of the endoscope shaft 3. The cuboid portion of the prism 14 has corresponding pressing surfaces, which are the pressure balls 1 8, 20 respectively facing.

The deflection prism 14 also has a light exit side 36, wherein the light exit side 36 is aligned in a plane parallel to the longitudinal axis of the endoscope 1. An image sensor 38 is arranged on the light exit side 36 of the prism 14 so that the light beams diverted by the deflection prism 14 are detected by means of the image sensor 38. Preferably, the image sensor 38 is adhered to the light exit side 36.

In Fig. 4A is a cross section through the sleeve 1 2 in the region of the pressure balls 1 8, 20 shown schematically. Fig. 4B schematically shows a perspective view with the cross-sectional representation in the area of the pressure balls 18, 20.

As can be seen from both figures, the Andrückkugeln are 1 8, 20 in contact with their facing pressure surfaces of the prism 14, wherein for positioning and fixing of the prism 14 in the sleeve 1 2, the Andrückkugeln 1 8, 20 each with the facing Andrückfläche Prism 14, preferably selectively, glued. To fix the Andrückkugeln 1 8, 20 in the respective holes 28, 30, adhesive is also introduced into the holes 28, 30, so that after curing of the adhesive, the Andrückkugeln 1 8, 20 are fixed in the holes 28, 30. Preferably, the pressure balls 1 8, 20 are made in an embodiment of glass or ceramic.

All these features, including the drawings alone to be taken as well as individual features that are disclosed in combination with other features are considered alone and in combination as erfindungswesentl I. Embodiments of the invention may be accomplished by individual features or a combination of several features. In the context of the invention, features which are identified by "particular" or "preferably" are to be understood as optional features.

_Λ "

LIST OF REFERENCES

1 endoscope

2 handle

3 endoscope shaft

4 distal tip

5 viewing window

6 distal section

7 rotary wheel

8 slide switch

1 0 prism holder

1 2 sleeve

14 prism

1 6 stop

1 7.1, 1 7.2 stop

1 8 pressure ball

20 pressure ball

22 recess

28 hole

30 hole

34 light entry side

36 light exit side

38 image sensor

Claims

claims

1 . Prism holder (10) of a surgical instrument, in particular endoscope, more preferably video endoscope, for at least one prism (14) having surgical instrument, with a sleeve (1 2) for receiving a prism (14), wherein at least one prism pressure body (1 8, 20) provided with a pressing surface of a sleeve (12) arranged or arranged prism (1 4) is brought into contact or brought, is provided, wherein the sleeve (1 2) each have an opening (28, 30) for or the prism pressure body (18, 20) and the at least one prism pressure body (18, 20) in the respective opening (28, 30) is arranged or arranged.

2. prism holder (1 0) according to claim 1, characterized in that the Prismenandrückkörper (18, 20) one of the pressing surface of the prism (14) facing rounded or ge has curved contact surface.

Prism holder (1 0) according to claim 1 or 2, characterized in that the Prismenandrückkörper (1 8, 20) as a ball (1 8, 20), in particular as a metal ball or glass ball or ceramic ball is formed.

A prism holder (10) according to any one of claims 1 to 3, characterized in that the respective opening (28, 30) for the prism pressure body (1 8, 20) as a bore (28, 30) in the sleeve (1 2) is formed.

A prism holder (10) according to any one of claims 1 to 4, characterized in that, when arranging a prism (14) in the sleeve (1 2), the prism pressure body (1 8, 20) in the opening (28, 30) for the prism pressure body ( 18, 20) attached, in particular glued, is or is.

A prism holder (10) according to any one of claims 1 to 5, characterized in that in the arrangement of one or the prism (14) in the sleeve (1 2) of the Prismenandrückkörper (1 8, 20) with the the prism pressure body (18, 20) facing Pressing surface of the prism (14) connected, in particular glued, is or is.

Prism holder (10) according to one of claims 1 to 6, characterized in that two prism pressure bodies (1 8, 20) are provided for each one pressing surface of the prism (14).

A prism holder (10) according to any one of claims 1 to 7, characterized in that the prism (14) serves as a deflecting Prism (14), in particular 90 ° prism (14) is formed.

9. prism holder (10) according to any one of claims 1 to 8, characterized in that the prism (14) has a parallelepiped-shaped portion with two mutually perpendicularly arranged pressing surfaces for each prismand a mandrel body (1 8, 20).

A prism holder (10) according to any one of claims 1 to 9, characterized in that in the sleeve (1 2) a prism (14) having a light entry surface (34) and a light exit surface (36) is arranged, wherein the light entry surface (24) of the Prism (14) perpendicular to the longitudinal axis of the sleeve (1 2) and the light exit surface (36) of the prism (14) are aligned parallel to the longitudinal axis of the sleeve (12).

Prism holder (1 0) according to one of claims 1 to 1 0, characterized in that in the sleeve (1 2) an image sensor (38) is arranged, wherein the image sensor (38) is arranged parallel to the light exit surface of the prism (14).

Surgical instrument, in particular endoscope, with prism holder (1 0) according to one of claims 1 to 1 1.

Surgical instrument according to claim 1 2, characterized in that the surgical instrument has an insertable into a body cavity of a living organism shaft, in particular endoscope shaft, wherein the prism holder (1 0) in the shaft, in particular endoscope shaft is arranged.