DE102022128572A1 - Coupling plug for detachably connecting a light guide to a coupling device of a medical instrument - Google Patents

Abstract

The invention relates to a coupling plug (2) for detachably connecting a light guide (6) to a coupling device (4) of a medical instrument (8), in particular an endoscope light guide coupling plug, comprising a light guide holder (10) which is designed to receive a light guide (6) and to enable light to be coupled out of the light guide (6), and a clamping unit (12) which is attached to the light guide holder (10) and which is designed to mechanically fix the light guide holder (10) to the coupling device (4) in a clamped state and to allow the light guide holder (10) to be released from the coupling device (4) in a released state, wherein the clamping unit (12) has a clamping section (14) which, in the clamped state, applies a radial force to the coupling device (4), a deflection section (16) which is movable in an axial direction relative to the light guide holder (10), wherein an axial movement of the deflection section (16) causes the radial Force is generated and an actuating section (18) which is movable relative to the optical fiber holder (10) for actuation, wherein actuation of the actuating section (18) leads to the generation of an actuating force which produces the axial movement of the deflection section (16).The invention further relates to a coupling system (66) with a coupling plug (2).

Description

The present invention relates to a coupling plug for detachably connecting a light guide to a coupling device of a medical instrument, in particular an endoscope light guide coupling plug, and a coupling system for detachably connecting a light guide to a medical instrument, in particular an endoscope light guide coupling system.

An endoscope is often used nowadays to perform a diagnostic and/or therapeutic procedure, such as a minimally invasive surgical intervention, on a part of a patient's body that is difficult to access. Parts of the body that are difficult to access are, in particular, hollow spaces such as a body cavity and/or a hollow organ. The endoscope is designed in such a way that it can be partially guided into the patient's cavity in order to perform the diagnostic and/or therapeutic procedure. In addition, the endoscope is usually intended to shine light into the patient's cavity during the diagnostic and/or therapeutic procedure in order to make anatomical structures visible and/or to be able to better monitor the diagnostic and/or therapeutic procedure. For this purpose, the endoscope is designed to guide light from a coupling device into the patient's cavity, with the light being coupled into the endoscope at the coupling device. In order to guide the light to the coupling device of the endoscope, a flexible light guide is often provided, which can be detachably connected to a light source at one end and to the coupling device of the endoscope at the other end.

In order to detachably connect the light guide to the coupling device of the endoscope, a coupling plug is provided according to the state of the art, which can be screwed onto the coupling device. The coupling device often comprises at least one standardized component. Furthermore, according to the state of the art, the coupling plug is designed in such a way that it can be easily screwed onto the coupling device with just a few turns. This is achieved, for example, by a multi-start thread on the coupling plug and the coupling device, which only requires a few turns to close completely. However, multi-start threads have a low self-locking effect, which can lead to the coupling plug becoming at least partially detached from the coupling device during operation of the endoscope and the coupling of light into the endoscope being impaired or even made impossible. This impairs the quality of the diagnostic and/or therapeutic action. This also poses a problem for the safety of the operation of the endoscope and/or the safety of the patient and/or the user.

Based on the prior art, it is an object of the present invention to increase the safety in connection with a coupling device of a medical instrument, in particular an endoscope.

The object is achieved according to the invention by a coupling plug and a coupling system as described herein and defined in the claims.

The present invention provides a coupling plug for detachably connecting a light guide to a coupling device of a medical instrument, in particular an endoscope light guide coupling plug. The coupling plug comprises a light guide holder which is designed to receive a light guide and to enable light to be coupled out of the light guide, and a clamping unit which is attached to the light guide holder and which is designed to mechanically fix the light guide holder to the coupling device in a clamped state and to allow the light guide holder to be released from the coupling device in a released state, wherein the clamping unit comprises a clamping section which, in the clamped state, applies a radial force to the coupling device, a deflection section which is movable in an axial direction relative to the light guide holder, wherein an axial movement of the deflection section generates the radial force, and an actuating section which is movable relative to the light guide holder for actuation, wherein an actuation of the actuating section leads to the generation of an actuating force which generates the axial movement of the deflection section.

According to the invention, this achieves the goal of establishing a secure connection between the light guide and the coupling device. The probability that the connection will at least partially come loose during operation of the medical instrument is reduced. This increases the safety associated with the operation of the medical instrument. For example, light is reliably coupled out of the light guide and coupled into the medical instrument. This is particularly advantageous in order to achieve a consistent quality of operation of the medical instrument. A screw connection that can be established quickly and easily can still have a high degree of self-locking and be correspondingly reliable thanks to the measures according to the invention. For example, in connection with the particularly partially automated For the purpose of making a diagnosis at specific points based on image data generated during operation of the medical instrument, the at least substantially consistent quality of operation of the medical instrument is advantageous. The consistent quality of operation can in particular mean the provision of light with at least substantially unchanged amplitude and frequency. In addition, the coupling plug can advantageously be connected to coupling devices known from the prior art. Furthermore, the probability is reduced that the light guide will at least substantially completely detach from the coupling device of the medical instrument during operation and that the light with high energy density will consequently pose a danger to a user and/or patient. In addition, simple and/or intuitive operation of the coupling plug is advantageous.

The medical instrument can be any medical instrument that requires light at least partially from an external source to carry out a therapeutic and/or diagnostic action. Light in this context can include at least any electromagnetic radiation visible to the human eye. In particular, light can mean illumination light. Furthermore, light can include electromagnetic radiation with a wavelength that is necessary for imaging methods, in particular for hyperspectral and/or multispectral imaging. The medical instrument can, for example, at least partially include an endoscope and/or exoscope.

The light from the external source can be guided to the medical instrument via a light guide so that it can be coupled into it. For this purpose, the light guide can be connectable to the coupling device of the medical instrument in order to fix one end of the light guide in a suitable position relative to the medical instrument. The suitable position is, for example, one in which contact of the end of the light guide with a light guide device of the medical instrument is provided and/or light can be coupled into the medical instrument with sufficient efficiency and/or intensity for the diagnostic and/or therapeutic action. Light that is coupled out of the light guide, in particular in the area of the coupling plug, should in particular be coupled into the medical instrument.

The coupling device can be designed to enable the coupling of light into the medical instrument. For this purpose, the light guide is, for example, partially pushed into the coupling device and/or brought into contact with the latter and/or a device enclosed by the latter. Furthermore, the coupling device can be designed to facilitate and/or permit the mechanical fixation of a device enclosing the light guide, in particular the coupling plug. The medical instrument can comprise a housing which, for example, houses lines, cables and/or tools in its interior. The coupling device can be designed to provide access to the interior of the housing of the medical instrument. In addition, the coupling device can be a standardized and/or standardized component. The connection between the light guide and the coupling device is detachable, which means that the connection can be established as required, for example before the therapeutic and/or diagnostic action is carried out. The coupling device can preferably have a circular and/or approximately round cross-section. Furthermore, the coupling device can be rotationally symmetrical with respect to the axial direction. Significant can mean relating to the basic geometry. This can include elements that negligibly alter the symmetry.

The coupling plug can be connected to the coupling device at least essentially via a coupling side of the coupling device. The coupling side is the side of the coupling device that faces the light guide and/or defines a plane that is at least essentially orthogonal to the longitudinal axis. The coupling device can define an outer diameter in the area of the coupling side of, for example, 1 mm to 20 mm, preferably 4 mm to 10 mm, in particular 6 mm to 8 mm.

The light guide holder encloses the light guide in such a way that at least almost no and/or only minimal relative movements occur between the light guide holder and the light guide. For example, the light guide can be glued and/or clamped and/or glued and/or clamped into the light guide holder. If the light guide holder is mechanically fixed to the coupling device, the light guide is connected to the coupling device. Furthermore, the light guide holder can be designed in such a way that the clamping unit can be attached to it. Attaching the clamping unit to the light guide holder means, for example, restricting, in particular preventing, a relevant axial movement between the clamping unit and the light guide holder. In particular in the clamped state, an axial movement between the clamping unit and the light guide holder can be restricted in such a way that the light guide holder is mechanically fixed to the coupling device. and/or the light guide is securely connected to the coupling device.

The detachability of the connection of the optical fiber to the coupling device can be achieved in that the clamping unit can be clamped by the user for mechanical fixation to the coupling device and can be released from the coupling device to release the optical fiber holder. Mechanical fixation means in particular axial fixation. For example, according to the invention, rotation between the optical fiber and the coupling device can be possible in the clamped state. In principle, a distinction can be made between the clamped state and the released state. The transition between the two states can be continuous and/or gradual and/or the actuating section can continue to be actuated despite one of the two states being reached. For example, the actuating section can continue to be actuated and/or the clamping unit can continue to be clamped even though the clamped state has already been reached. According to the invention, the coupling plug and in particular the clamping unit can be provided to provide a user with information about the achievement of at least one of the two states, for example haptic and/or visual information and/or a sound. Furthermore, the coupling plug and/or the clamping unit can be designed to prevent further actuation and/or clamping in the clamped state.

The clamping unit can at least partially enclose the coupling device. For example, the coupling plug can be designed to be plugged, pushed, pressed, guided and/or the like onto the coupling device. If the clamping unit at least partially encloses the coupling device, the radial force acts in particular in the direction of the center of the particularly round cross-section of the coupling device.

The radial force applied by the clamping section in the clamped state can have a magnitude that ensures the mechanical fixation of the optical fiber holder on the coupling device, preferably during normal operation of the medical instrument. Furthermore, the magnitude can be provided such that the mechanical fixation is released during operation of the medical instrument if an axial force that is not intended to be large and/or a force that only occurs in an operating state that deviates from a normal operating state acts on the optical fiber holder, for example because the user or an assistant trips over the optical fiber. It can be provided that the radial force has a magnitude to mechanically fix the optical fiber holder on the coupling device predominantly or exclusively by a frictional connection between the clamping unit and the coupling device. According to the invention, further embodiments are also conceivable in which the mechanical fixation is not achieved predominantly by a frictional connection, but for example by a positive connection, in particular a rear grip.

The deflection section can have an axial direction of movement intended for generating the radial force. If the deflection section is moved in this direction, the radial force is generated. If the deflection section is moved in an opposite direction, the radial force is at least reduced. If a state is reached in which the clamping section no longer applies a radial force to the coupling device, it can be provided that the deflection section can be moved further in the opposite direction. This can be advantageous in particular in connection with the release of the optical fiber holder from the coupling device. The deflection section can in particular be a force deflection section. This can in particular deflect the actuating force in such a way that the radial force is generated.

The relative movement to the actuation of the actuation section can, for example, be an axial movement, a radial movement, a rotational movement and/or a combination of these movements. In particular, one of the movements can condition and/or cause another of the movements. It is provided that the user brings about the relative movement by actuating the optical fiber to connect the coupling device of the medical system. It can be provided that the user has to apply a force, for example a clamping force, during the actuation. The clamping force can have at least substantially the same amount as the actuation force. The direction of the clamping force can be the same or a different direction than the actuation force. The actuation force and/or the clamping force can be related to the radial force, for example in a physical and/or mathematical relationship, in particular in a geometric relationship.

According to some embodiments, the clamping section can comprise at least one projection which, in the clamped state, defines a radially innermost point of the clamping section. It can be provided, for example, that the coupling device is mechanically fixed at least in part by the radially innermost point of the clamping section in the clamped state is radially further inward than at least one point of the coupling device, wherein the at least one point of the coupling device is arranged distally and the radially innermost point of the clamping section is arranged proximally in relation to the medical instrument. In other words, the projection can engage behind the coupling device. For example, the coupling device can be designed with a projection that encompasses the corresponding point, with a groove and/or with a pocket. The radially innermost point of the clamping section can be arranged proximally relative to the medical instrument, while the projection is arranged distally. The radially innermost point of the clamping section can also at least partially engage in the groove and/or pocket in a connected state.

Such embodiments are advantageous because the detachable connection is more secure than with a mechanical fixation primarily caused by frictional force. In addition, the actuation of the actuation section is simplified and/or made more secure. The radial force caused by the actuation, which depends in particular on the individual user, can play a subordinate role in the mechanical fixation of the light guide holder. This advantageously makes the connection more independent of the action and/or actuation and/or the extent of the action and/or actuation of the user.

Furthermore, the actuation of the actuating section can comprise a rotation of the actuating section. The axial movement of the deflection section can be generated by means of a profiled section, for example by means of a spiral and/or at least partially axial profiled section, in particular by means of a thread. The actuating section can comprise the profiled section.

Advantageously, the actuation is similar to the screw movement used to lock conventional coupling plugs. This increases acceptance and safety.

In addition, the clamping unit can comprise at least one active element, and the deflection section can comprise at least one surface that is inclined with respect to the axial direction and at least partially in contact with the active element, wherein an axial movement of the surface generates a radial force on the active element, whereby the axial movement of the deflection section generates the radial force. An angle of the inclined surface determines in particular how large the amount of the generated radial force is in relation to the range of movement in the axial direction. In principle, a larger angle causes a proportionally larger radial force. According to the invention, the angle can be designed in particular geometrically by taking the angle and the actuating section into account. The active element can define a further inclined surface, which preferably has at least substantially the same angle as the inclined surface. The active element can also be, for example, a projection formed in the radially outer direction and/or comprise such a projection. This has the advantage that the coupling plug can be adapted to different coupling devices by simple design measures.

According to further embodiments, the clamping unit may comprise a sleeve which is attached to the optical fiber holder and which at least partially defines the clamping section.

Furthermore, the sleeve can be designed with slots. For example, the sleeve can be a slotted sleeve.

Furthermore, the sleeve can comprise at least one slot and at least two sections separated from one another by the slot, so that a sleeve diameter can be changed in the region of the at least one clamping section by the slot becoming smaller and the sections separated from one another by the slot approaching one another. The mechanical force required to change the sleeve diameter in the region of the at least one clamping section is defined primarily by the rigidity of the sleeve in relation to the direction of change. The sleeve diameter can be an outer diameter or an inner diameter. The rigidity depends in particular on the material of the sleeve and/or the sleeve geometry. These are advantageously provided taking into account the design of the other sections of the clamping unit. If the clamping section comes into contact with the coupling device, the sleeve diameter can no longer be significantly reduced, for example, and the coupling device is subjected to the radial force.

In addition, the clamping unit may comprise a nut that defines the actuating section.

In particular, the clamping unit can be designed in several parts, in particular in two parts. The clamping unit can comprise the nut and the sleeve. This leads to a simpler and/or more economical manufacture of the coupling plug.

In addition, the nut can at least partially accommodate the sleeve and the axial Directionally inclined and at least partially in contact with the active element. The nut can encompass a radially outermost point of the coupling plug. A profile and/or a surface and/or a coating can be provided on a radially outer side of the nut, which is intended to facilitate the actuation, in particular by improving the coefficient of friction between the user and the coupling plug.

Furthermore, the nut can comprise a thread that is designed to generate the axial movement of the deflection section when the actuating section is actuated. The nut can advantageously be designed to be screwed onto the light guide holder and/or the sleeve by a user for actuation. The actuation is therefore intuitive and safe.

In addition, the sleeve can comprise at least one active element. The active element can advantageously be formed in a close region of the clamping section. In particular, the active element can be formed in the axially almost and/or at least partially the same region as the clamping section.

According to further embodiments, the clamping unit can project axially beyond the light guide holder. In a non-connected state, contact between the light guide holder and/or in particular the end of the light guide and a person, for example the user, the helper and/or the patient, can advantageously be prevented. Due to the energy density of the coupled-out light, contact carries the risk of causing burns and/or eye injuries, for example. Safety in connection with medical facilities can be increased and the risk of accidents reduced.

The present invention also provides for a coupling system for detachably connecting a light guide to a medical instrument, in particular an endoscope light guide coupling system, comprising a coupling device and a coupling plug that can be connected to the coupling device. In particular, the coupling plug can be a coupling plug according to the invention.

Furthermore, a groove can be provided on the coupling device and, when the coupling plug is connected, the clamping section can at least partially engage in the groove. Advantageously, the axial force, in particular axial pressure force, which can arise from contact between a wall of the groove and the clamping section, can mechanically fix the optical fiber holder.

In addition, the coupling device can comprise a base and an adapter placed on the base, and when the coupling plug is connected, the clamping section can apply the radial force to the adapter. The base can in particular be a standardized and/or standardized component. The adapter can, for example, be designed to improve the mechanical fixation of the optical fiber holder and/or make it more secure. For example, the groove can be formed on the adapter and designed to be related to the coupling plug. In general, the adapter can be designed to be related to the coupling plug.

The invention is explained below using figures as examples. The drawing, the description and the claims contain numerous features in combination. The person skilled in the art will also expediently consider the features individually and use them in combination as appropriate within the scope of the claims.

If there is more than one example of a particular object, only one of them may be provided with a reference symbol in the figures and in the description. The description of this example can be transferred to the other examples of the object accordingly. If objects are named in particular using numerical words, such as first, second, third object, etc., these serve to name and/or assign objects. Accordingly, for example, a first object and a third object, but not a second object, can be included. However, a number and/or sequence of objects could also be derived using numerical words.

• 1 ein medizinisches System, das ein medizinisches Instrument, in diesem Fall ein Endoskop, ein medizinisches Gerät, einen Bildschirm und eine alleinstehende Lichtquelle umfasst;
• 2 eine Ausführungsform eines Kupplungssystems, umfassend einen Kupplungsstecker und die Kupplungseinrichtung, wobei der Kupplungsstecker in einem mit der Kupplungseinrichtung verbundenen Zustand dargestellt ist;
• 3 einen Grundsockel in einer vergrößerten Ansicht;
• 4 eine Lichtleiterfassung;
• 5 eine Draufsicht in axialer Richtung und einen Querschnitt eines Montageelements;
• 6 einen Querschnitt in axialer Richtung und eine Seitenansicht einer Hülse;
• 7 einen Querschnitt in axialer Richtung und eine Seitenansicht einer Mutter;
• 8 eine perspektivische Ansicht, einen Querschnitt in axialer Richtung und eine Seitenansicht einer weiteren Ausführungsform der Hülse;
• 9 eine weitere Ausführungsform eines Kupplungssystems, wobei die Kupplungseinrichtung zweiteilig ausgeführt ist;
• 10 eine vergrößerte Ansicht eines Adapters;
• 11 eine perspektivische Ansicht, einen Querschnitt in axialer Richtung und eine Seitenansicht der Hülse; und
• 12 eine vergrößerte Ansicht einer Mutter.

Show it:

• 1 a medical system comprising a medical instrument, in this case an endoscope, a medical device, a display and a stand-alone light source;
• 2 an embodiment of a coupling system comprising a coupling plug and the coupling device, wherein the coupling plug is shown in a state connected to the coupling device;
• 3 a base in an enlarged view;
• 4 a fiber optic socket;
• 5 a plan view in axial direction and a cross-section of a mounting element;
• 6 a cross-section in axial direction and a side view of a sleeve;
• 7 a cross-section in axial direction and a side view of a nut;
• 8th a perspective view, a cross-section in the axial direction and a side view of another embodiment of the sleeve;
• 9 a further embodiment of a coupling system, wherein the coupling device is designed in two parts;
• 10 an enlarged view of an adapter;
• 11 a perspective view, a cross-section in the axial direction and a side view of the sleeve; and
• 12 a close-up view of a mother.

1 shows a medical system 43 that includes a medical instrument 8, in this case an endoscope 48, a medical device 47, and a screen 44. The medical device 47 includes a light source 46 and an interface 62 for the endoscope 48. The medical device 47 is connected to the endoscope via the interface 62 by means of a data cable 50. The data cable 50 is designed to transmit image data from the endoscope 48 to the medical device 47. The endoscope 48 is designed to generate the image data. In particular, the endoscope 48 is designed to generate image data from a cavity of a patient, for example a body cavity and/or a hollow organ, for carrying out a diagnostic and/or therapeutic action. The generated image data can be displayed on the screen 44, for example during the diagnostic and/or therapeutic action, and/or processed by the medical system 43, for example to support the diagnostic and/or therapeutic action.

In order to be able to control the lighting conditions in the cavity, the endoscope 48 comprises a lighting device (not shown in detail). The lighting device of the endoscope 48 can be fed and/or supplied with light in particular via the light source 46 by coupling light into the endoscope 48. For this purpose, a coupling device 4 is arranged on the endoscope 48 and/or the endoscope 48 comprises a coupling device 4. Depending on the embodiment, the coupling device 4 can form a light interface 64 to a light guide device 56 of the lighting device of the endoscope 48 and/or surround and/or enclose such a light interface 64.

In order to guide the light from the light source 46 to the endoscope 48, a light guide 6 is provided which is connected at one end to the light source 46 in such a way that light can be coupled into the light guide 6 on the light source side. To couple light into the endoscope 48, the light guide 6 can be connected to the coupling device 4 of the endoscope 48 if required. If required, the light source 46 can be connected to the endoscope 48 by means of the light guide 6 and the connection can be released again. In this way, various functions in the 1 Medical instruments 8 (not shown) can be connected to the light source 46 if required. A coupling plug 2 is provided at the other end of the light guide 6 to connect the light cable 6 to the endoscope 48 and/or to other medical instruments 8. The coupling plug 2 is provided according to the invention in such a way that the light guide 6 is and/or can be detachably connected to the coupling device 4 of the endoscope 48. Embodiments of the coupling plug 2 are described in more detail in further figures.

2 shows an embodiment of a coupling system 66, comprising the coupling plug 2 and the coupling device 4, wherein the coupling plug 2 is shown in a state connected to the coupling device 4. The coupling plug 2 and the coupling device 4 are essentially rotationally symmetrical about a longitudinal axis 68. The coupling device 4 comprises a base 40. The base 40 forms a groove 38. Furthermore, the base 40 encloses the light guide device 56. The light guide device 56 is flush with the side facing the coupling plug 2 and defines the light interface 64 there. This side can also be referred to as distal, in particular with respect to the endoscope 8. Accordingly, the other side in the axial direction can be referred to as proximal, in particular with respect to the endoscope 8.

The coupling plug 2 comprises a light guide holder 10 and a clamping unit 12. In addition, the coupling plug according to this example comprises a mounting element 54. The light guide holder 10 can hold a light guide (not shown), such as one of the light guides 6 of the 1 , to connect the light guide 6 to the coupling device 4, one end of the light guide holder 10 is brought close to the coupling device 4 and/or the light interface 64, in particular into contact with the coupling device 4 and/or the light interface 64, such that light can be coupled into the light guide device 56 of the endoscope 48 via the light interface 64. In this or another similarly suitable position, the light guide holder 10 is mechanically fixed to the coupling device 4 using the clamping unit 12.

The clamping unit 12 is attached to the light guide holder 10 by means of the mounting element 54. In particular, a sleeve 26 of the clamping unit 12 is attached to the light guide holder 10. For assembly, the mounting element comprises a mounting thread 37, whereby the mounting element 54 can be screwed onto the light guide holder 10. This allows the clamping unit 12 to be fixed at least in the axial direction. It can also be provided that the mounting element 54 exerts a compressive force in the axial direction on the clamping unit 12 such that it is pressed against a step of the light guide holder 10. This can at least limit rotation of the clamping unit 12 at least about the axis of symmetry. Alternatively or additionally, it can be provided that the clamping unit 12 is pressed and/or glued onto the light guide holder 10.

For mechanically fixing the light guide holder 10 to the coupling device 4, the clamping unit 12 can be brought into a clamped state by an actuation. By a further actuation, the clamping unit 12 can be brought into a released state, which allows the light guide holder 10 to be released from the coupling device 4. For this purpose, the clamping unit 12 comprises the sleeve 26 and a nut 34. The sleeve 26 is designed with a clamping section 14, an active element 22 and a thread 36. Further features of the sleeve 26 are described, for example, in the 6A and 6B shown in more detail. The nut 34 is designed with an actuating section 18 and a deflecting section 16. The clamping section 14 of the sleeve 26 comprises a projection 20 which, in the clamped state, defines a radially innermost point of the clamping section 14. The active element 22 of the sleeve 26 is in contact with the deflecting section 16, in particular with an inclined surface 24 of the deflecting section 16 of the nut 34. The nut 34 partially receives the sleeve 26 and comprises a thread 36. By means of the thread 36, the nut 34 can be screwed onto the sleeve 26 by the actuation in order to bring the clamping unit 12 into the clamped or released state. The thread 36 of the nut 34 at least partially defines the actuating section 18.

In order to mechanically fix the optical fiber holder 10 to the coupling device 4, the actuating section 18 can be actuated by a user. For actuation, the nut 34 is screwed onto the sleeve 26 and/or sitting on the sleeve 26. The rotational movement required for screwing is converted into an axial movement by the thread 36. In addition, the actuation leads to the generation of an actuating force which generates an axial movement of the deflection section 16 and in particular of the inclined surface 24. According to this embodiment, the nut 34 is screwed onto the sleeve 26 in such a way that an axial movement of the deflection section 16 and in particular an axial movement of the inclined surface 24 in the distal direction is generated.

Because the inclined surface 24 is in contact with the active element 22, which is also designed as an inclined surface, a radial force is exerted on the sleeve 26, in particular on the active element 22 and the clamping section 14 of the sleeve 26, by the axial movement in the distal direction of the inclined surface 24. If there is a distance in the radial direction between the clamping section 14 and a mechanical obstacle, such as the coupling device 4 in this case, the radial force on the sleeve 26 causes a reduction in a sleeve diameter 32 in the area of the clamping section 14. However, if the clamping section 14 is in contact with the coupling device 4, the sleeve diameter 32 can no longer be significantly reduced and the coupling device 4 is subjected to the radial force by the clamping section 14.

According to some embodiments, a coupling device 4 can be provided which does not comprise a groove 38 and/or a coupling plug 2 which does not comprise a projection 20. According to some embodiments, the radial force can, taking into account a coefficient of friction which depends on the surface quality of the clamping section 14 and the area of the coupling device 4 subjected to the radial force, create a frictional force which counteracts an axial relative movement between the coupling plug 2, in particular the optical fiber holder 10, and the coupling device 4. The coupling device 4 can accordingly be subjected to such a large radial force that the optical fiber holder 10 is mechanically fixed to the coupling device 4.

According to the 2 In the embodiment shown, at least in addition, the projection 20 of the clamping section 14 at least partially engages in the groove 38 of the coupling device 4. The projection 20 is arranged in relation to the light guide holder 10 in such a way that when the projection 20 engages in the groove 38, light can be coupled into the endoscope 48 via the light interface 64. If the coupling plug 2 and/or the light guide 6 is subjected to an axial force, an additional radial force can be exerted on the clamping section 14 and the active element 22. The nut 34 then counteracts an increase in the sleeve diameter 32 by the nut 34 receiving the sleeve 26, in particular in the axial region of the clamping section 14. The nut 34 is accordingly provided with a rigidity that counteracts the increase in the sleeve diameter 32. which is preferably provided in such a way that the light guide holder 10 does not detach from the coupling device 4 during a common, usual and/or intended use of the endoscope 48. The rigidity can be designed by constructive measures such as the choice of material and/or the choice of the material thickness.

In particular, the base base 40 of the coupling device 4 can be a standardized component. In this case, the geometric dimensions of the base base 40 and in particular of the groove 38 are known. In addition, such a base base 40 is provided on many common medical instruments 8 or is included in them.

3 shows the base 40 in an enlarged view. According to the 2 In the embodiment shown, the coupling device comprises only the base base 40 shown here with its groove 38. In addition, the base base 40 comprises a base thread 58. According to the example shown, the base base 40 defines a nominal outer diameter 70 of 7.49 mm.

4 shows the light guide holder 10 again without the light guide 6. The light guide 6 can be accommodated by the light guide holder 10 and/or the light guide holder 10 can be provided on the light guide 6 in such a way that the coupling out of the light guide 6 is possible. In particular, it can be provided that the light guide 6 is flush with the end of the light guide holder 10 that is proximal to the endoscope 48. This end of the light guide 6 represents a counterpart to the light interface 64 of the light guide device 56. In addition, the external mounting thread 39 is provided on the light guide 10, which enables the mounting element 54 to be screwed on.

The 5A and 5B show a top view in the axial direction and a cross section of the mounting element 54. The mounting element 54 is ring-shaped, wherein the inner diameter corresponds at least substantially to the inner diameter of the area of the light guide 10 on which the mounting element 54 is to be mounted. The mounting thread 37 matching the external mounting thread 39 of the light guide 10 is also provided on the mounting element 54.

The 6A and 6B show a cross-section in the axial direction and a side view of the sleeve 26. In the top view, the sleeve 26 appears ring-shaped. The sleeve 26 is hollow so that it can be attached to the light guide holder 10. In addition, the sleeve 26 is largely rotationally symmetrical and defines a center point 60 on the axis of rotation, which corresponds to the longitudinal axis 68. The radial direction points to the center point 60 and away from it, so a radial axis would go through the center point 60.

Furthermore, the sleeve 26 is formed with four slots 28 that extend over part of the total length of the sleeve 26, in this case over at least 30% and at most 90% of the total length. In particular, the slots 28 extend over 60% - 70% of the total length. In addition, the slots 28 extend from one end of the sleeve 26, at which the clamping section 14 is defined, to its root, which is defined as the area of a slot 28 to which the slot 28 extends. The root can have a geometry that is advantageous for the mechanical design of the sleeve 26. For example, the root can be substantially rectangular, substantially circular. In 6B the roots of the slots 28 are essentially circular. In cross-section, the slots 26 can be, for example, essentially rectangular, as in the present case, or essentially trapezoidal.

The sleeve 26 is divided into four sections 30 by the slots 28, particularly in the area of the clamping section 14, so that the sleeve diameter 32 can be reduced and the sections 30 can be brought closer together. Furthermore, the projection 20, which defines the radially innermost point of the clamping section 14, extends over the circumference of the clamping section 14 and is divided by the slots 28. In addition, the sleeve 26 defines the active element 22, which is also surrounded by the sections 30 and divided by the slots 28.

The slots 26 also have a width and/or take up part of the circumference of the cross section. Furthermore, the width of the slots 26 can be defined relative to the width of the sections 30, with the inner circumference of the cross section being decisive for the definition of the width. The slots can have, for example, 20% to 180%, in this case in particular 30% to 35%, of the width of the sections 30.

The active element 22 is formed radially outside around the clamping section 14 as an inclined surface. With reference to 2 by the actuation of the actuating section 18, a radial force is generated on the active element 22 and, provided there is no mechanical obstacle such as the coupling device 4, the sleeve diameter 32 is reduced as the sections 30 approach each other. The sections approach each other by being deformed, preferably elastically, in the direction of the center point 60. However, if the sleeve 26, in particular the clamping section 14, at least partially encloses the coupling device 4, the approach of the sections 30 can be at least partially prevented. In this case, the radial force acts on the coupling device 4, or the coupling device 4 is subjected to the radial force by the clamping section 14.

In the untensioned state, the sleeve diameter 32 is provided such that it is larger than the radially outermost point of the coupling device 4 of the areas in which the coupling device 4 is subjected to the radial force and the distal area of the coupling device 4. As a result, the coupling plug 2 for connecting the light guide 6 to the coupling device 4 can be pushed onto the coupling device 4 with almost no resistance until a suitable position is reached at which light can be coupled into the endoscope 48. In this position, the coupling device 4 can then be subjected to the radial force by actuation in order to mechanically fix the light guide holder 10.

Furthermore, the sleeve 26 comprises an external thread 35 onto which the nut 34 can be screwed.

The 7A and 7B show a cross section in the axial direction and a side view of the nut 34. The nut is hollow so that it can at least partially accommodate the sleeve 26, and also forms the actuating section 18 and the deflection section 16. The actuating section 18 comprises the thread 36, which can be screwed onto the external thread 35 of the sleeve 26. Actuating the actuating section 18 comprises a rotation of the nut 34 with the actuating force in order to screw it onto the sleeve 26. The actuating force generates an axial movement of the nut 34 together with the deflection section 16 by means of the thread 36. The deflection section 16 comprises the inclined surface 24, which is at least partially in contact with the active element 22 of the sleeve 26. The axial movement of the nut 34 together with the deflection section 16 therefore also causes the inclined surface 24 to move in the axial direction. This movement generates the radial force on the active element, whereby the axial movement of the deflection section 16 generates the radial force with which the coupling device 4 can be acted upon.

The nut 34 is also designed such that it projects axially beyond the light guide holder 10. In particular, the nut 34 projects beyond the light guide holder 10 in the area in which the light interface 64 according to 2 and/or one end of the light guide 6, not shown, is provided.

The 8A , 8B and 8C show a 3D view, a cross section in the axial direction and a side view of another embodiment of a sleeve 26'. The embodiment of the sleeve 26` shown here is the one in the 6A and 6B shown embodiment. The difference is that six slots 28` and six sections 28` are provided. By changing the number of slots 28, 28` and sections 28, 28` and by changing their geometry, the rigidity of the sleeve 26, 26` can be provided as required, particularly in the area of the clamping section 14, 14' in the radial direction. It can be seen that the slots 28` are formed over at least half the length, in particular at least substantially 75% - 80% of the length of the sleeve 26` and/or define a substantially rectangular cutout at their root. The slots 28` are also approximately the same width as the sections 30', the width of the slots 28` therefore corresponding to approximately 100% of the width of the sections 30', whereby the inner circumference of the cross section of the sleeve 26` is decisive. The sleeve 26` also comprises an external thread 35`.

9 shows a further embodiment of a coupling system 66", comprising a coupling plug 2" and a coupling device 4", wherein the coupling plug 2" is in a state connected to the coupling device 4". The embodiment of the coupling system 66" shown here is the one in 2 shown embodiment. The main difference is that the coupling device 4'' is made in two parts and the coupling plug 2'' is adapted to this. In this case, the coupling device 4'' comprises the base 40 of the 3 and an adapter 42'' placed, in particular screwed, on the base thread 58. The adapter 42'' comprises a groove 38'', into which a clamping section 14'' can at least partially engage, and an adapter thread 59'' for screwing the adapter 42'' onto the base base 40 in order to place the adapter 42'' onto the base base 40. The coupling plug 2'' comprises the light guide holder 10'', a mounting element 54'', a sleeve 26'' and a nut 34'', wherein the sleeve 26'' and the nut 34'' have at least partially the same features as those with regard to the 2 to 8 described. The geometry of the nut 34'' and the sleeve 26'' is adapted to the geometry of the adapter 42''. The adapter 42'' projects axially beyond the base 40 so that it accommodates the light interface 64. In order to connect the light guide holder 10 to the coupling device 4'', the light guide holder 10 can be partially pushed into the adapter 42''.

10 shows an enlarged view of the adapter 42'' of the 9 The adapter 42'' can in particular be an adapter known from the prior art. The adapter 42'' forms the groove 38'' and the adapter thread 59''.

The 11A , 11B and 11C show a 3D view, a cross section in the axial direction and a side view of the sleeve 26''. The sleeve 26'' comprises six slots 28'', which divide the sleeve 26'' in the area of the clamping section 14'' into six sections 30''. The sleeve 26'' can be elastically deformable in the area of the clamping section 14'' in order to mechanically fix the light guide 10 to the coupling device 4''. Due to the elastic deformation, the sections 30'' approach each other, whereby the sleeve diameter 32'' is reduced. As a result, the adapter 42'' of the coupling device 4'' can be subjected to the radial force. The sleeve 26'' also comprises a projection 20'', which defines the radially innermost point of the clamping unit 14'' and can at least partially engage in the groove 38''. In addition, the sleeve 26'' comprises the active element 20'' and the external thread 35''. These and/or other features can be essentially the same as those of the sleeve 26. It can also be seen that the slots 28'' are formed over at least half the length, in particular at least essentially 80% - 90% of the length of the sleeve 26'' and/or define a substantially circular cutout at their root. The width of the slots 28'' corresponds to approximately 60% to 70% of the width of the sections 30'', with the inner circumference of the cross section of the sleeve 26'' being decisive.

12 shows an enlarged view of the nut 34'' comprising the deflection section 16'' and the actuating section 18''. The nut 34'' forms an inclined surface 24'' and a thread 36''. These and/or other features may be substantially the same as those of the nut 34.

List of reference symbols

2

Coupling plug

4

Coupling device

6

Light guide

8th

medical instrument

10

Fiber optic socket

12

Clamping unit

14

Clamping section

16

Deflection section

18

Operating section

20

head Start

22

Active element

24

sloping surface

26

Sleeve

28

slot

30

Sections

32

Sleeve diameter

34

Mother

35

External thread

36

thread

37

Mounting thread

38

Groove

39

Mounting external thread

40

Base base

42

adapter

43

medical system

44

Screen

46

Light source

47

medical device

48

endoscope

50

Data cable

54

Mounting element

56

Light guide device

58

Socket thread

59

Adapter thread

60

Focus

62

interface

64

Light interface

66

Coupling system

68

Longitudinal axis

70

outer diameter

Claims (15)

Coupling plug (2) for detachably connecting a light guide (6) to a coupling device (4) of a medical instrument (8), in particular an endoscope light guide coupling plug, comprising: a light guide holder (10) which is designed to receive a light guide (6) and to enable light to be coupled out of the light guide (6); and a clamping unit (12) which is attached to the light guide holder (10) and which is designed to mechanically fix the light guide holder (10) to the coupling device (4) in a clamped state and to allow the light guide holder (10) to be released from the coupling device (4) in a released state, wherein the clamping unit (12) comprises: a clamping section (14) which, in the clamped state, applies a radial force to the coupling device (4); a deflection section (16) which is oriented in an axial direction relative to the light guide holder (10). device, wherein an axial movement of the deflection section (16) generates the radial force; and an actuating section (18) which is movable for actuation relative to the optical fiber holder (10), wherein actuation of the actuating section (18) leads to the generation of an actuating force which generates the axial movement of the deflection section (16). Coupling plug (2) after Claim 1 ,wherein the clamping section (14) comprises at least one projection (20) which, in the clamped state, defines a radially innermost point of the clamping section (14). Coupling plug (2) after Claim 1 or 2 , wherein actuating the actuating portion (18) comprises rotating the actuating portion (18). Coupling plug (2) according to one of the preceding claims, wherein the clamping unit (12) comprises at least one active element (22); and wherein the deflection section (16) comprises at least one surface (24) which is inclined with respect to the axial direction and at least partially in contact with the active element, wherein an axial movement of the surface (24) generates a radial force on the active element (22), whereby the axial movement of the deflection section (16) generates the radial force. Coupling plug (2) according to one of the preceding claims, wherein the clamping unit (12) comprises a sleeve (26) which is attached to the optical fiber holder (10) and which at least partially defines the clamping section (14). Coupling plug (2) after Claim 5 , wherein the sleeve (26) is slotted. Coupling plug (2) after Claim 6 ,wherein the sleeve (26) comprises at least one slot (28) and at least two sections (30) separated from one another by the slot (28), such that a sleeve diameter (32) in the region of the at least one clamping section (14) can be changed by the slot (28) becoming smaller and the sections (30) separated from one another by the slot (28) approaching one another. Coupling plug (2) according to one of the preceding claims, wherein the clamping unit (12) comprises a nut (34) which defines the actuating portion (18). Coupling plug (2) at least according to Claims 4 , 5 and 8th , wherein the nut (34) at least partially receives the sleeve (26) and forms the surface (24) which is inclined with respect to the axial direction and at least partially in contact with the active element (22). Coupling plug (2) after Claim 8 or 9 , wherein the nut (34) comprises a thread (36) which is adapted to produce the axial movement of the deflection section (16) upon actuation of the actuating section (18). Coupling plug (2) at least according to Claims 4 and 5 , wherein the sleeve (26) comprises the at least one active element (22). Coupling plug (2) according to one of the preceding claims, wherein the clamping unit (12) projects axially beyond the optical fiber holder (10). Coupling system (66) for detachably connecting a light guide (6) to a medical instrument (8), in particular an endoscope light guide coupling system, comprising: a coupling device (4); and a coupling plug (2) according to one of the preceding claims, which can be connected to the coupling device (4). Coupling system (66) according to Claim 13 , wherein a groove (38) is provided on the coupling device (4), and wherein in a connected state of the coupling plug (2) the clamping section (14) at least partially engages in the groove (38). Coupling system (66) according to Claim 13 or 14 , wherein the coupling device (4) comprises a base base (40) and an adapter (42) placed on the base base (40), and wherein in the connected state of the coupling plug (2) the clamping section (14) applies the radial force to the adapter.

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