DE202016008558U1 - Medical tool device - Google Patents

Abstract

A medical tool device, in particular a medical hand tool device, with a shaft receptacle (10a), with a shaft (14a, 14b) at least partially insertable into the shaft receptacle (10a) in a receiving direction (12a, 12b) and with a coupling unit (16a) which is joined to a shaft detachable coupling of the shaft (14a, 14b) with the shaft receptacle (10a) is provided and which comprises at least one latching groove (18a), at least one Entriegelungsnut (20a) and at least one deformable element (22a), which has at least a first functional state, in in that the deformable element (22a) produces, by means of the latching groove (18a), the coupling of the shaft (14a; 14b) with the shaft receptacle (10a) and which has at least a second functional state in which the deformable element (22a) couples the shaft (14a, 14b) with the shaft receiving (10a) dissolves, wherein the deformable element (22a) by means of Entriegelungsnut (20a) of the first Funkti onszustand in the second functional state can be transferred.

Description

State of the art

The invention relates to a medical tool device according to claim 1.

From the prior art it is known to connect a shaft of a tool unit by means of a coupling unit with a shank receiving a processing unit form fit.

The object of the invention is in particular to provide a generic device with improved properties in terms of reliability, especially with regard to a safer connection. The object is achieved by the features of claims 1 and 14, while advantageous embodiments and modifications of the invention can be taken from the dependent claims.

Advantages of the invention

The invention relates to a medical tool device, in particular a medical hand tool device, with a shaft receptacle, with at least one shaft which is at least partially insertable into the shaft receptacle in a receiving direction and can be removed from the shaft receptacle in a withdrawal direction and with a coupling unit which leads to a releasable coupling of the shaft Shaft is provided with the shank receiving and which at least one Einrastnut, at least one Entriegelungsnut and at least one deformable element comprises, which has at least a first functional state in which the deformable element by means of the locking groove makes the coupling of the shaft with the shaft receptacle, and which at least one second functional state, in which the deformable element releases the coupling of the shaft with the shaft receptacle, wherein the deformable element by means of the Entriegelungsnut from the first functional state in the second functional state can be transferred.

In particular, a reliability of the tool device can be improved by this configuration. Advantageously, a health hazard to a patient can be avoided by a malfunction of the tool device, such as by an unintentional release of the shaft. Furthermore, assembly and / or disassembly can be simplified. Further advantageously, the tool device can be provided with a poka-yoke arrangement, by means of which in particular a faulty operation can be avoided. In addition, sterility of the tool device can be improved particularly advantageously, since, on the one hand, joints between components, in particular a shaft which is too loosely coupled and a shaft receptacle, are reduced and, on the other hand, contamination due to a loosening shaft can be reduced. Particularly advantageous can be done by means of the deformable element damping of the shaft, which in particular vibrations can be damped and / or reduced. This allows in particular a particularly gentle treatment.

A "medical tool device" should be understood to mean, in particular, at least one part, in particular a subassembly, of a medical tool which is intended to be used for a medical and in particular a surgical procedure and which in particular has medical standards known to a person skilled in the art a sterility and harmless materials met. In particular, a "medical hand tool device" is to be understood as meaning at least part of a medical tool intended to be hand-held, advantageously hand-operated, guided, actuated and / or at least partially, in particular at least for the most part and particularly preferably completely worn by an operator In particular, forces, such as weight forces, radial and / or axial forces at least partially, preferably at least to a large extent and particularly preferably completely by hand generated and / or recorded. The term "at least a large part" should be understood to mean in particular a proportion of at least 55%, advantageously of at least 65%, preferably of at least 75%, more preferably of at least 85% and particularly advantageously of at least 95%. By "intended" is intended to be understood in particular specially designed and / or equipped. The fact that an object is intended for a specific function should in particular mean that the object fulfills and / or executes this specific function in at least one application and / or operating state.

The tool device has, in particular, at least one actuating unit. The actuating unit is provided in particular for actuating, guiding, for operating and / or for carrying the medical tool. The actuation unit is in particular non-positively, positively and / or materially connected to the shaft receptacle. A "force and / or positive connection" should be understood in particular a detachable connection, wherein a holding force between two components is preferably transmitted by a geometric engagement of the components into one another and / or by a frictional force between the components. Under "cohesively connected" should in particular be understood that mass parts are held together by atomic and / or molecular forces, such as by a gluing process, a Anspritzprozess, a welding process, a soldering process and / or another, a person skilled in the appear appropriate process. It is particularly conceivable that the actuating unit and the shaft receptacle are at least partially formed in one piece or that the shaft receptacle is advantageously formed as a part of the actuating unit. By "at least partially integrally connected and / or formed" should be understood in particular that at least one component of at least one object, in particular the object itself, integrally connected to at least one component at least one further object, in particular with the other object itself, and / / or is formed. In addition, "integral" should in particular be understood as being at least materially bonded. The material bond can be produced, for example, by an adhesive process, an injection process, a welding process, a soldering process and / or another process that appears appropriate to a person skilled in the art. Advantageously should be understood as "one piece" shaped in one piece. Preferably, this one piece is made of a single blank and / or a cast.

The shaft receptacle defines in particular a working axis of rotation of the tool device. In this context, a "work axis of rotation" should be understood to mean, in particular, an axis around which the tool device is provided in an operating state, rotated and / or along which the tool device is provided in an operating state to be moved back and forth. The removal direction and the receiving direction are in particular at least substantially parallel to the working axis of rotation. By "at least substantially parallel" should in this case be understood in particular an alignment of a direction relative to a reference direction, in particular in a plane, wherein the direction relative to the reference direction in particular a deviation of at most 8 °, advantageously of more than 5 ° and particularly advantageous of not more than 2 °. Advantageously, the receiving direction and the removal direction are mutually opposite directions and advantageous anti-parallel to each other.

In particular, the tool device has at least one tool unit, which comprises at least one insertion tool, which is preferably designed as a medical and in particular a surgical insertion tool designed advantageously for a person skilled in the art. For example, the insertion tool may be a hammer, a curette, a file, and / or a screwdriver blade, preferably a screwdriver bit. The tool unit has in particular at least the shaft.

The coupling unit is in particular provided to at least by means of the deformable element, the shaft and the shaft receiving non-positively and / or positively connect with each other. A "deformable element" should in particular be understood to mean an element which can be deformed without damage and / or destruction from at least one state into at least one further state. In particular, the deformable element can also be an elastic element which is repeatedly deformable from at least one functional state into at least one further functional state and which after deformation automatically returns to the functional state, which is a ground state in which the deformable element is free from deformation, tends.

A "first functional state" and a "second functional state" are understood in particular to mean states of different degrees of deformation and / or in particular directions of deformation of the deformable element. In the first functional state, the deformable element in particular has a higher degree of deformation than in the second functional state. Preferably, the second functional state is a ground state of the deformable element. Furthermore, the deformable element in particular has a third functional state in which the deformable element can preferably be transferred. In the third functional state, the deformable element in particular has a higher degree of deformation than in the second functional state. Preferably, the degree of deformation of the third functional state is at least substantially equivalent to the degree of deformation of the first functional state. The first functional state and the third functional state differ in particular from one another in a direction of the deformation of the deformable element. In particular, a direction of deformation of the deformable element in the first functional state is mirror-symmetrical to a direction of deformation of the deformable element in the third functional state.

The latching groove and the unlocking groove are provided, in particular, for deforming the deformable element, in particular during a movement of the shaft relative to the shaft receptacle, and / or for relaxing it in the ground state, in particular the second functional state. Preferably, the latching groove is provided to form in the first functional state of the deformable element with this a positive and / or non-positive connection. Furthermore, the Entriegelungsnut is advantageously provided, in particular in a Movement of the shaft relative to shaft receiving in the receiving direction, to convert the deformable element from the first to the second functional state. Furthermore, the unlocking groove is advantageously provided for transferring the deformable element from the second functional state into the third functional state, in particular during a movement of the shaft relative to the shaft receptacle in the removal direction. The coupling unit has a functional element which is provided for deforming the deformable element during insertion of the shaft into the shaft receptacle in the receiving direction and advantageously for transferring it from the second functional state into the first functional state.

The deformable element is provided for coupling the shaft with the shaft receptacle in particular to act on the shaft with a holding force. The holding force is particularly dependent on the functional state of the deformable element. In addition, the holding force, in particular of the first functional state and of the third functional state, is dependent on a direction, in particular the receiving direction and / or the removal direction, in which the shaft is moved relative to the shaft receptacle. Advantageously, in the first functional state, a maximum holding force acts upon movement of the shaft relative to the shaft receptacle in the withdrawal direction, and preferably a minimum holding force upon movement of the shaft relative to the shaft receptacle in the receiving direction. In the second functional state, the acting holding force is in particular independent of a movement of the shaft relative to the shaft receptacle. Advantageously, in the third functional state, a maximum holding force acts upon movement of the shaft relative to the shaft receptacle in the receiving direction and in particular a minimum holding force upon movement of the shaft relative to the shaft receptacle in the removal direction. Regardless of the type of functional state, the respective maximum holding force is particularly preferably greater by at least a factor of 5, preferably by at least a factor of 10, more preferably by at least a factor of 20, and particularly preferably by a factor of 50, than the respective minimum holding force. In the first functional state, the maximum holding force of the first functional state and / or of the third functional state is advantageously at least substantially greater than a holding force of the second functional state. In particular, the holding force in the second functional state is at least substantially eliminated. In the first functional state, the deformable element is provided, in particular, for preventing a movement of the shaft relative to the shaft receptacle by means of the maximum holding force in the withdrawal direction and preferably to allow a movement of the shaft relative to the shaft receptacle in the receiving direction due to the minimum holding force. In the third functional state, the deformable element is in particular provided to prevent movement of the shaft relative to the shaft receptacle in the receiving direction by means of the maximum holding force and preferably to allow movement of the shaft relative to the shaft receptacle in the withdrawal direction due to the minimum holding force.

It is also proposed that the latching groove and the Entriegelungsnut viewed along the receiving direction are arranged one behind the other. In particular, the latching groove and the unlocking groove are arranged such that when the shaft is inserted into the shaft receptacle, the unlocking groove is inserted after the latching groove. The latching groove and the unlocking groove have in particular a circular course. In particular, the latching groove and the unlocking groove each have a profile which comprises a triangular and / or quadrangular, preferably at least substantially trapezoidal, cross section. By "at least substantially trapezoidal" should be understood in particular a shape of a quadrilateral, which has two at least substantially parallel but unequal length sides. Advantageously, the latching groove and / or the unlocking groove has chamfers, which are provided to deform the deformable element at a movement of the shaft relative to the shank receiving at least partially in the receiving direction and / or removal direction and advantageous to convert into the various functional states. The latching groove and the Entriegelungsnut advantageously have different profiles. In particular, the profiles have different profile depths, with a profile depth of the latching groove preferably being less than a profile depth of the unlocking groove. Furthermore, it is conceivable that the profiles have different cross sections, for example, the cross section of the profile of the latching groove may be at least substantially trapezoidal and the cross section of the profile of Entriegelungsnut triangular. It is conceivable that the latching groove, the Entriegelungsnut, the receiving groove and / or the deformable element have rough and / or edged surfaces, which are intended to engage in each other to prevent twisting of the deformable element. As a result, the deformable element can advantageously be converted into various functional states in a simple manner by means of the unlocking groove and the latching groove. In particular, the order of the arrangement of the latching groove and the Entriegelungsnut the order of movements for coupling and for solving the coupling of shaft and shank receiving defined, whereby more preferably a Poka-Yoke provision can be provided.

It is conceivable that the coupling unit is at least partially formed integrally with the shaft and / or the shaft receptacle. In a preferred embodiment of the invention it is proposed that the shaft at least partially forms the latching groove and / or at least partially the Entriegelungsnut. The latching groove and the unlocking groove extend in particular annularly, advantageously at least substantially parallel to each other, to a lateral surface of the shaft. In particular, the latching groove and the Entriegelungsnut are arranged in a one end portion of the shaft adjacent portion of the shaft. The end portion is in particular the insert tool opposite. An "end section" is to be understood in particular as meaning a section of the shaft which extends from a free end of the shaft in the direction of a particular geometric center of the shaft over a distance, in particular not more than 30%, preferably not more than 20% and particularly preferably not more than 10 % of a main extension of the shaft, in particular of at most 2 cm, preferably of at most 1 cm and particularly preferably of at most 0.5 cm. In particular, a diameter of the end portion may be equal to or greater than a diameter of the end portion adjacent to the portion of the shaft. Preferably, a diameter of the end portion is smaller than a diameter of the end portion adjacent to the portion. Preferably, the diameter of the end portion is in particular at least 10%, preferably at least 15% and more preferably at least 20% smaller than the diameter of the adjacent portion. Furthermore, it is advantageously proposed that the shaft receptacle at least partially forms a receiving groove of the coupling unit, in which the deformable element is arranged at least partially, in particular at least in large part. Alternatively, it is conceivable that the shaft receptacle at least partially forms the latching groove and the Entriegelungsnut and the shaft at least partially forms the receiving groove of the coupling unit. In this way, sterility can be improved because the latching groove, the Entriegelungsnut and the receiving groove are particularly easy to clean. In particular, in an embodiment in which the shaft receptacle forms the receiving groove of the coupling unit, a component savings can be achieved since different shanks which can be coupled to the shaft receptacle do not each require a deformable element. Furthermore, the deformable element is protected against loss, whereby a reliability and advantageously a service life can be further improved.

The deformable element may in particular be formed from an elastic ring, such as a rubber ring and / or metal ring, which advantageously has a greatest thickness in the radial direction. In order to increase the robustness of the deformable element and in particular a service life, it is proposed in a particularly preferred embodiment of the invention that the deformable element is designed as an annular spring. The deformable element is in particular formed by at least one spiral spring bent into a ring. It is conceivable that the deformable element consist of several, in particular nested, spiral springs bent into a ring.

It is further proposed that the shaft has an insertion element, which is intended to center the shaft in the shaft receptacle, and by means of which the deformable element can be converted into the first functional state. The insertion element is in particular the functional element. The insertion element is in particular formed by chamfers of the end portion of the shaft. In this way, advantageously, insertion of the shaft can be simplified. In particular, sterility can be further improved, as during assembly of the shaft is exposed only a short time a potentially contaminated environment. Further advantageously, deformation of the deformable element during insertion of the shaft into the shaft receptacle can be facilitated.

In order to avoid unintentional release when the shaft is loaded in the receiving direction, it is proposed that the medical tool device has a translational securing device which has at least one securing state in which the translational securing device is provided for translational movement of the shaft relative to the shaft receptacle in the receiving direction prevent, and which has at least one Entsicherungszustand in which the translation assurance is intended to allow a translational movement of the shaft relative to the shaft receiving in the receiving direction. In this way, an unwanted movement and in particular release of the shaft can be prevented during an operation.

It is also proposed that the translational securing has at least one securing element which, in the securing state, provides a stop for the shaft, in particular the end section of the shaft, and which is displaceable at least substantially perpendicular to the receiving direction of the shaft. The term "substantially perpendicular" is intended here to define, in particular, an orientation of a direction relative to a reference direction, the direction and the reference direction, in particular in one plane, including an angle of 90 ° and the angle, in particular, a deviation of at most 8 °, advantageously of not more than 5 ° and particularly advantageously not more than 2 °. The securing element is in particular at least partially arranged within the shaft receptacle, wherein the securing element is advantageously arranged completely in the securing position in the shaft receptacle and is arranged only partially in the shaft receptacle, in particular in the unlocking state. The securing element is in particular arranged in the shaft receptacle such that a distance between the receiving groove and the securing element at least substantially corresponds to an extension of the end section of the shaft in the direction of picking up and in particular at most 5%, preferably at most 2% and particularly preferably at most 1% is smaller. In particular, the translation assurance on at least one, in particular two, preferably opposing bearing elements and at least one, in particular two, preferably opposing, formed corresponding to the bearing element further bearing elements, which store the securing element displaceable, in particular at least substantially perpendicular to the receiving direction of the shaft , In particular, in each case a bearing element engages in a further bearing element. The bearing element is in particular designed as a pin and preferably connected to the shaft receptacle in particular materially, in particular by means of a tungsten inert gas welding process. The corresponding bearing element is preferably formed by a recess of the securing element. In particular, the translation assurance device has at least one return element, which is provided to return the securing element from the unlocking state into the securing state. The return element is in particular deformable, preferably designed as a spiral spring, and particularly preferably arranged within the shaft receptacle, preferably between the securing element and a shaft receiving housing of the shaft receptacle. It is also conceivable that the securing element itself is deformable, so that can be dispensed with the return element. In addition, the translation assurance has, in particular, an operating element which is intended to be actuated by an operator and preferably to be pressed at least substantially perpendicular to the receiving direction, in particular into the shaft receptacle, in order to preferably transfer the securing element from the securing state into the unlocking state. Advantageously, the control is integral with the, fuse element formed. This can advantageously be done in a simple manner and way backup. In particular, an intuitive operation can be achieved, which further operational safety can be further improved.

Furthermore, it is proposed that the securing element has at least one first recess, which is at least partially, preferably at least along the receiving direction, corresponding to the shaft, in particular to the end portion of the shaft, formed, and at least a second recess having a cross-section, which at least is substantially larger than a cross section of the shaft, in particular of the end portion of the shaft, wherein the first recess and the second recess overlap at least partially. The first recess is particularly intended to serve in the securing state as a stop for the end portion of the shaft. The second recess is in particular provided to at least partially receive the end portion of the shaft in the release state, in order advantageously to allow movement of the shaft relative to the shaft receptacle in the receiving direction. This can be done in a simple manner a backup.

In a preferred embodiment of the invention it is proposed that the medical tool device has an anti-rotation device, which is provided in at least one operating state to prevent a rotational movement of the shaft relative to the shaft receiving. In particular, the first recess of the securing element at least partially forms the anti-rotation device, so that advantageously the anti-rotation device and the translation securing device are at least partially formed integrally with each other.

In a further aspect of the invention, a method for operating a medical tool device is proposed, comprising a coupling unit which is provided for releasably coupling a shaft to a shaft receptacle and which comprises at least one latching groove, at least one unlocking groove and at least one deformable element, wherein at least a first functional state of the deformable element by means of the locking groove, a coupling of the shaft is made with the shaft receptacle and by means of the Entriegelungsnut the deformable element is transferred from the first functional state to a second functional state, wherein in the second functional state of the deformable element, the coupling of the shaft the shank holder is released. As a result, a reliability can be improved.

The medical tool device according to the invention should not be limited to the application and embodiment described above. In particular, in order to fulfill a mode of operation described herein, the drive device according to the invention can have a number deviating from a number of individual elements, components and units mentioned herein. In addition, in the value ranges indicated in this disclosure, also within the These values are considered to be disclosed and to be considered as applicable.

list of figures

Further advantages emerge from the following description of the drawing. In the drawings, embodiments of the invention are shown. The drawings, the description and the claims contain numerous features in combination. The person skilled in the art will expediently also consider the features individually and combine them into meaningful further combinations.

• 1 ein medizinisches Werkzeug mit einer Werkzeugvorrichtung in einer perspektivischen Darstellung,
• 2 die Werkzeugvorrichtung in einer Explosionsdarstellung,
• 3 einen Teil der Werkzeugvorrichtung in einer Schnittansicht,
• 4a-c einen Teil der Werkzeugvorrichtung mit einem Schaft, einer Translationssicherung und einer Drehsicherung in verschiedenen Ansichten,
• 5a-e mehrere Schritte zur Kopplung und Entkopplung des Schafts mit und von einer Schaftaufnahme der Werkzeugvorrichtung mittels einer Kopplungseinheit der Werkzeugvorrichtung in mehreren Schnittansichten,
• 6 ein schematisches Ablaufdiagramm für ein Verfahren zur Kopplung und Entkopplung des Schafts mit und von der Schaftaufnahme,
• 7a-c einen Teil einer alternativen medizinischen Werkzeugvorrichtung in verschiedenen Ansichten,
• 8 eine weitere alternative medizinische Werkzeugvorrichtung und
• 9 eine zusätzliche alternative medizinische Werkzeugvorrichtung.

Show it:

• 1 a medical tool with a tool device in a perspective view,
• 2 the tool device in an exploded view,
• 3 a part of the tool device in a sectional view,
• 4a-c a part of the tool device with a shank, a translation safeguard and a rotation lock in different views,
• 5a-e a plurality of steps for coupling and decoupling the shaft with and from a shaft receptacle of the tool device by means of a coupling unit of the tool device in a plurality of sectional views,
• 6 a schematic flow diagram for a method for coupling and decoupling of the shaft with and from the shaft receiving,
• 7a-c a part of an alternative medical tool device in different views,
• 8th another alternative medical tooling device and
• 9 an additional alternative medical tool device.

Description of the embodiments

1 . 2 and 3 show a medical tool 44a with a medical tool device that is designed as a medical hand tool device. The tool device is intended to be used in a medical, in particular surgical, method.

The tool device has an actuating unit 56a on. The operating unit 56a is provided for operation of the tool apparatus by an operator. The operation is one-handed. In a machining operation, the tool device is by means of the actuating unit 56a around a working axis of rotation 50a rotatable. Furthermore, in a machining operation, the tool device is by means of the actuating unit 56a along the working axis of rotation 50a movable. The operating unit 56a has a handle core 58a on. The handle core 58a is formed in the present case as a hollow cylinder. The handle core 58a consists at least partially of metal. The operating unit 56a has a cover 60a on. The end cover 60a consists at least partially of metal. The end cover 60a closes one end of the handle core 58a , The end cover 60a is cohesive with the handle core 58a connected. The end cover 60a is with the handle core 58a welded, in particular by means of a tungsten inert gas welding process. The operating unit 56a has a handle 54a on. The handle 54a is formed in the present case at least substantially drop-shaped. Alternatively, the handle 54a be formed at least substantially rod-shaped and / or at least substantially T-shaped. In particular, to apply large torques by means of the tool device, is an at least substantially T-shaped configuration of the handle 54a advantageous. The handle 54a consists at least partially of a plastic, and advantageously made of silicone. The handle 54a at least partially encloses the handle core 58a , The handle 54a is concentric about the handle core 58a arranged. The handle 54a is cohesive, in particular by means of encapsulation, with the handle core 58a connected. In a production of the operating unit 56a becomes the handle 54a directly around the handle core 58a injected. Alternatively or additionally, the handle could 54a positive and / or non-positive with the handle core 58a be connected. Further, the handle 54a cohesively, in particular by means of encapsulation, with the end cover 60a connected. In a production of the operating unit 56a becomes the handle 54a directly to the end cap 60a molded. Alternatively or additionally, the handle could 54a positive and / or non-positive with the handle core 58a and / or the end cap 60a be connected, such as by means of a threaded connection. It is also conceivable that the actuating unit 56a could also be formed in one piece.

The tool device has a shaft receptacle 10a on. The shaft holder 10a includes a shaft receiving housing 64a , The shaft holder 10a is positive and / or non-positive with the actuator unit 56a related. The shaft receiving housing 64a has an external thread. The handle core 58a has a to the external thread of the shaft receiving housing 64a corresponding internal thread on. For positive and / or non-positive connection of the shaft holder 10a with the operating unit 56a Be the external thread of the shaft receiving housing 64a and the internal thread of the handle core 58a bolted together and / or braced. Furthermore, in particular to difficult sterilizable joints between the shaft receiving 10a and the operating unit 56a to avoid the grip core 58a and the shaft receiving housing 64a laser welded together. Additionally or alternatively, a cohesive connection of the shaft receptacle 10a and the operating unit 56a conceivable. These can be the shaft receiving housing 64a and the handle core 58a , in particular in each case in the region of the external thread and the internal thread, be glued together. Alternatively, the shank receptacle 10a and the operating unit 56a be at least partially connected in one piece.

The tool device has a tool unit 48a on. The tool unit 48a is intended for processing a processing object and / or for transmitting power to a processing object. The tool unit 48a in particular comprises at least one insertion tool 52a , The insertion tool 52a can be designed as any, to a professional appear beneficial tool, which is used in a medical and in particular surgical method used. For example, the insertion tool 52a be designed as a hammer, a saw, a curette and / or a file. In the present case, the insert tool 52a designed as a screwdriver blade and advantageously as a hexagon bit. The tool unit 48a has a shaft 14a on. The shaft holder 10a serves to hold the shaft 14a , The shaft holder 10a has a shank receiving area 62a on. The shank receiving area 62a is from the shaft receiving housing 64a limited. The shaft 14a is in at least one operating state in the shaft receiving area 62a arranged. The shaft 14a is in a recording direction 12a in the shaft socket 10a insertable. Furthermore, the shaft 14a in a withdrawal direction 13a from the shaft holder 10a removable. The recording direction 12a and the removal direction 13a are aligned opposite each other.

The tool device has a coupling unit 16a on. The coupling unit 16a is to a releasable coupling of the shaft 14a with the shaft holder 10a intended. The coupling unit 16a is intended to the shaft 14a to couple with the shaft receiving 10a, so that a movement, such as a translation and / or a rotational movement of the actuating unit 56a along the working axis of rotation 50a , which is provided in particular for exerting a force and / or a torque on a machining object, on the tool unit 48a is transmitted.

The coupling unit 16a has at least one deformable element 22a on. The deformable element 22a is an annular spring. The deformable element 22a is formed by at least one curved into a ring coil spring. The deformable element 22a is at least partially in a receiving groove 28a arranged. The shaft holder 10a at least partially forms the receiving groove 28a out. The receiving groove 28a is through a recess of the Schaftaufnahmegehäuses 64a educated.

The deformable element 22a is at a coupling of the shaft 14a with the shaft holder 10a intended to be deformed and the shaft 14a to apply a holding force. The holding force depends on the functional state of the deformable element 22a , Furthermore, the holding force is dependent on a direction, in particular the receiving direction 12a and / or the removal direction 13a in which the shaft 14a relative to the shank receiving 10a is moved. Accordingly, acts on the deformable element 22a the shaft 14a depending on a direction in which the shaft 14a relative to the shank receiving 10a is moved, with a minimum holding force and / or a maximum holding force.

The deformable element 22a has at least a first functional state. The deformable element 22a has at least a second functional state. In the first functional state, the deformable element has 22a a higher degree of deformation than in the second functional state. The second functional state is a basic state of the deformable element 22a , In the second functional state, the deformable element 22a at least substantially free of deformation. Furthermore, the deformable element 22a a third functional state. In the third functional state, the deformable element has 22a a higher degree of deformation than in the second functional state. The degree of deformation of the third functional state is at least substantially equivalent to the degree of deformation of the first functional state. The first functional state and the third functional state differ essentially by a direction of deformation of the deformable element 22a , The deformation directions of the first functional state and the third functional state are mirror-symmetrical to each other.

A maximum holding force, which acts in the first functional state and / or in the third functional state, is at least substantially greater than a maximum holding force, which acts in the second functional state. In the second functional state, a holding force is at least substantially eliminated. In the first functional state, the maximum holding force with a movement of the shaft 14a relative to the shank receiving 10a in the removal direction 13a , In the first functional state, a minimum holding force acts on a movement of the shaft 14a relative to the shank receiving 10a in the take-up direction 12a. In the second functional state, the holding force is independent of a direction of movement of the shaft 14a relative to the shank receiving 10a , In the third functional state, a maximum holding force acts on a movement of the shaft 14a relative to the shaft receptacle 10a in the take-up direction 12a , In the third functional state, a minimum holding force acts on a movement of the shaft 14a relative to the shank receiving 10a in the removal direction 13a , The respective maximum holding force and the respective minimum holding force differ at least by the factor 5 , preferably at least by the factor 10 , more preferably at least by a factor 20 and most preferably at least by the factor 50 ,

The coupling unit 16a has at least one latching groove 18a on. The shaft 14a the tool unit 48a at least partially forms the latching groove 18a out. The latching groove 18a is in a partial section 66a of the shaft 14a arranged. The subsection 66a is an end section 68a of the shaft 14a immediately adjacent. The coupling unit 16a has at least one unlocking groove 20a on. The shaft 14a the tool unit 48a at least partially forms the Entriegelungsnut 20a out. The unlocking groove 20a is in the subsection 66a of the shaft 14a arranged. The latching groove 18a and the unlocking groove 20a are arranged such that upon insertion of the shaft 14a in the shaft socket 10a the Entriegelungsnut 20a after the unlocking groove 18a is introduced. The latching groove 18a is in recording direction 12a considered behind the Entriegelungsnut 20a arranged. The latching groove 18a and the unlocking groove 20a are circular in shape around a lateral surface of the shaft 14a , The latching groove 18a and the unlocking groove 20a have profiles 24a . 26a on. The profiles 24a . 26a have a trapezoidal cross-section. The profiles 24a . 26a have chamfers. The chamfers are intended to be the deformable element 22a during a movement of the shaft 14a relative to the shank receiving 10a to deform and to convert into the respective functional state. The latching groove 18a and the unlocking groove 20a have different profiles 24a . 26a on.

The profiles 24a . 26a have different tread depths. A profile depth of the profile 24a of the latching groove 18a is smaller than a tread depth of the profile 26a the Entriegelungsnut 20a.

In addition to the locking groove 18a and the Entriegelungsnut 20a The coupling unit 16a has a further functional element. The further functional element is intended to be the deformable element 22a during a movement of the shaft 14a relative to the shank receiving 10a to deform and to convert into the respective functional state. The functional element is as an insertion element 30a educated. The shaft 14a has the insertion element 30a on. The insertion element 30a is intended to the shaft 14a in the shaft holder 10a to center. The insertion element 30a is through a beveled end section 68a of the shaft 14a educated. A diameter of the end section 68a is smaller than a diameter of the end portion 68a adjacent subsection 66a of the shaft 14a ,

4a-c show a part of the shaft 14a with a translation backup 32a and a rotation lock 42a the tool device. The translation backup 32a has at least one backup state. The translation backup is in the backup state 32a provided a translational movement of the shaft 14a relative to the shank receiving 10a in the recording direction 12a to prevent. Furthermore, the translation assurance 32a at least one Entsicherungszustand. In the unlock state is the translation backup 32a provided a translational movement of the shaft 14a relative to the shank receiving 10a in the recording direction 12a to allow.

The translation backup 32a has at least one securing element 34a on. The fuse element 34a is at least substantially perpendicular to the receiving direction 12a of the shaft 14a displaceable. The fuse element 34a is at least partially within the shaft socket 10a arranged. In the backup state is the fuse element 34a completely in the shaft holder 10a arranged. In Entsicherungszustand is the fuse element 34a only partially in the shank 10a arranged. The fuse element 34a is so in the shank 10a arranged that a distance between the receiving groove 28a and the fuse element 34a at least substantially an extension of the end portion 68a of the shaft 14a in recording direction 12a equivalent. For storage of the fuse element 34a For example, the translation backup 32a has two bearing elements 70a on. The bearing element 70a are arranged opposite each other. The bearing elements 70a are designed as pins. The bearing elements 70a are with the shaft holder 10a cohesively connected. These are the bearing elements 70a by means of a tungsten inert gas method with the shaft receiving housing 64a welded. Furthermore, the translation assurance 32a two to the bearing elements 70a correspondingly formed further bearing elements 72a on. The other bearing elements 72a lie opposite each other. The other bearing elements 72a be of recesses of the fuse element 34a educated. One each bearing element 70a engages in another bearing element 72a one. The bearing elements 70a and the other bearing elements 72a store the security element 34a displaceable, in particular at least substantially perpendicular to the receiving direction 12a ,

The translation backup 32a in particular has at least one return element 74a on. The return element 74a is intended to the fuse element 34a from the armed state to the backup state. The return element 74a is deformable. The return element 74a is designed as a spiral spring. The return element 74a is inside the shaft socket 10a arranged in the shaft receiving portion 62a. The return element 74a is between the fuse element 34a and the shaft receiving housing 64a arranged.

Furthermore, the translation assurance 32a a control 76a on. The operating element 76 is intended to be operated by an operator, preferably the securing element 34a from the fuse state to the armed state. This is the control element 76a at least substantially perpendicular to the receiving direction 12a pressed. In the present case, the operating element 76a integral with the securing element 34a educated.

The fuse element 34a has at least a first recess 38a on. The first recess 38a is along the recording direction 12a , corresponding to the end portion 68a of the shaft 14a educated. In the present case, the end section 68a an at least substantially quadrangular cross section. The first recess 38a is provided, in particular, in the securing state as a stop 36a for the end section 68a of the shaft 14a to serve to a movement of the shaft 14a relative to the shank receiving 10a in recording direction 12a to prevent. Furthermore, the securing element 34a at least a second recess 40a on. The second recess 40a has a cross section which is at least substantially larger than a cross section of the end section 68a of the shaft 14a , The second recess 40a is intended to be the end section 68a of the shaft 14a in the Entsicherungszustand at least partially to advantageously a movement of the shaft 14a relative to the shank receiving 10a in recording direction 12a to enable. The first recess 38a and the second recess 40a overlap at least partially.

The tool device has the rotation lock 42a on. In the backup state, the anti-rotation device 42a provided a rotational movement of the shaft 14a relative to the shank receiving 10a to prevent. The first recess 38a the securing element 34a at least partially forms the anti-rotation device 42a out. The rotation lock 42a and translation assurance 32a are at least partially formed integrally with each other.

In 5a-e is an example of a coupling of the shaft 14a with the shaft holder 10a shown. In 6 an associated schematic flow diagram of an associated method is shown.

5a shows a first coupling step 80a , The shaft 14a gets into the shaft socket 10a in recording direction 12a introduced. The deformable element 22a is in the second functional state. The insertion element 30a centers the shaft 14a relative to the shank receiving 10a , The insertion element 30a deforms upon insertion the deformable element 22a , The insertion element 30a transfers the deformable element 22a from the second functional state to the first functional state. The deformable element 22a acts on the shaft 14a with a holding force. Will the shaft 14a relative to the shank receiving 10a in recording direction 12a moves, acts on the deformable element 22a the shaft 14a with the minimum holding power. Will the shaft 14a relative to the shaft receiving 10a in removal direction 13a moves, acts on the deformable element 22a the shaft 14a with the maximum holding power. The maximum holding force of the deformable element 22a is advantageously selected in the first functional state such that it has at least one weight force of the tool unit 48a and / or the shaft 14a and preferably exceeds a force of an operator. The translation backup 32a is in the backup state.

5b shows a second coupling step 82a , The shaft 14a gets into the shaft socket 10a in recording direction 12a moves until positions of the deformable member 22a and the lock groove 18a to match. The deformable element 22a at least partially engages in the latching groove 18a one. The deformable element 22a represents by means of the latching groove 18a a coupling of the shaft 14a with the shaft holder 10a ago. The result is a positive and non-positive connection between the shaft 14a and shank receiving 10a , The result is a locking connection between the latching groove 18a and the deformable element 22a , By means of the maximum acting holding force and the additional coupling between the deformable element 22a and the latching groove 18a becomes a movement of the shaft 14a relative to the shank receiving 10a in the removal direction 13a prevented. The coupling unit 16a leaves only a movement of the shaft 14a relative to the shank receiving 10a in recording direction 12a to. The translation backup 32a is in the backup state. The translation backup 32a also prevents the movement of the shaft 14a relative to the shank receiving 10a in recording direction 12a ,

5c shows a first decoupling step 84a , By pressing the operating element 76a becomes the translation backup 32a transferred to the armed state. The translation backup 32a allows the movement of the shaft 14a relative to the shank receiving 10a in recording direction 12a , The shaft 14a becomes relative to the shank receiving 10a in recording direction 12a emotional. The coupling between the latching groove 18a and the deformable element 22a will be solved.

5d shows a second decoupling step 86a , The shaft 14a becomes relative to the shank receiving 10a in recording direction 12a emotional. The shaft 14a is moved until positions of the deformable element 22a and the Entriegelungsnut 20a to match. By means of Entriegelungsnut 20a becomes the deformable element 22a transferred from the first functional state to the second functional state. The deformable element 22a engages in the Entriegelungsnut 20a one. The deformable element 22a relaxed in the Entriegelungsnut 20a in the second functional state, which in particular a ground state of the deformable element 22a equivalent. In the second functional state, the deformable element releases 22a the coupling of the shaft 14a with the shaft holder 10a , The adhesive force of the deformable element 22a on the shaft 14a acts, is dissolved. The translation backup 32a is by means of the return element 74a transferred to the backup state.

5d shows a third decoupling step 88a , The shaft 14a is in removal direction 13a relative to the shank receiving 10a emotional. The unlocking groove 20a deforms the deformable element 22a , The unlocking groove 20a transfers the deformable element 22a from the second functional state to the third functional state. Will the shaft 14a relative to the shank receiving 10a in recording direction 12a moves, acts on the deformable element 22a the shaft 14a with the maximum holding power. Will the shaft 14a relative to the shank receiving 10a in removal direction 13a moves, acts on the deformable element 22a the shaft 14a with the minimum holding power. The shaft 14a gets out of the shaft socket 10a in removal direction 13a taken. Is the shaft 14a from the shaft holder 10a taken, relaxes the deformable element 22a from the third functional state to the second functional state.

In the 7 . 8th and 9 Further embodiments of the invention are shown. The following description and the drawing are essentially limited to the differences between the exemplary embodiments, with respect to identically named components, in particular with regard to components having the same reference numerals, in principle also to the drawing and / or the description of the other embodiments, in particular 1 to 6 , can be referenced. To distinguish the embodiments of the letter a is the reference numerals of the embodiment in the 1 to 6 readjusted. In the embodiments of the 7 . 8th and 9 the letter a is replaced by the letters b, c and d.

7 shows an alternative embodiment of the invention. The alternative embodiment differs from the previous embodiment at least substantially with respect to a design of a shaft 14b the tool device. In the present case has an end portion 68b of the shaft 14b an at least substantially hexagonal cross-section. A security element 34b the tool device has at least one first recess 38b on. The first recess 38b is along a take-up direction 12b , corresponding to the end portion 68b of the shaft 14b educated. In the present case, the first recess 38b formed corresponding to the at least substantially hexagonal cross-section of the end portion 68b.

8th shows a further alternative embodiment of the invention. The further alternative embodiment differs from the previous embodiment at least substantially with regard to a design of an actuating unit 56c the tool device. The operating unit 56c has a handle in the present case 54c on, which is at least substantially T-shaped.

8th shows an additional alternative embodiment of the invention. The further alternative embodiment differs from the previous embodiment at least substantially with regard to a configuration of an actuating unit 56d of the tool device. The operating unit 56d has a handle in the present case 54d which is at least substantially rod-shaped.

Claims (13)

A medical tool device, in particular a medical hand tool device, with a shaft receptacle (10a), with a shaft (14a, 14b) at least partially insertable into the shaft receptacle (10a) in a receiving direction (12a, 12b) and with a coupling unit (16a) which is joined to a shaft releasably coupling the shaft (14a, 14b) with the shank receptacle (10a) is provided and which comprises at least one latching groove (18a), at least one unlocking groove (20a) and at least one deformable element (22a), which has at least one first functional state in which the deformable element (22a) by means of the latching groove (18a) makes the coupling of the shaft (14a, 14b) with the shaft receptacle (10a), and which has at least a second functional state in which the deformable element (22a) couples the shaft (14a, 14b) to the shaft receptacle (10a ), wherein the deformable element (22a) can be converted from the first functional state into the second functional state by means of the unlocking groove (20a). Medical tool device according to Claim 1 , characterized in that the latching groove (18a) and the Entriegelungsnut (20a) along the receiving direction (12a; 12b) viewed in succession are arranged Medical tool device according to Claim 1 or 2 , characterized in that the latching groove (18a) and the Entriegelungsnut (20a) have different profiles (24a, 26a). Medical tool device according to one of the preceding claims, characterized in that the shaft (14a, 14b) at least partially forms the latching groove (18a) and / or at least partially the unlocking groove (20a). Medical tool device according to one of the preceding claims, characterized in that the shaft receptacle (10a) at least partially forms a receiving groove (28a) of the coupling unit (16a), in which the deformable element (22a) is at least partially arranged. Medical tool device according to one of the preceding claims, characterized in that the deformable element (22a) is formed as an annular spring. The medical tool device according to one of the preceding claims, characterized in that the shaft (14a, 14b) has an insertion element (30a) which is intended to center the shaft (14a, 14b) in the shaft receptacle (10a) and by means of which deformable element (22a) can be converted into the first functional state. Medical tool device according to one of the preceding claims, characterized by a translation securing device (32a) which has at least one securing state in which the translation securing device (32a) is provided for translational movement of the shaft (14a, 14b) relative to the shaft receptacle (10a) in the To prevent picking-up direction (12a, 12b) and which has at least one releasing state in which the translation securing device (32a) is provided for translational movement of the shaft (14a, 14b) relative to the shaft receptacle (10a) in the receiving direction (12a, 12b) to allow. Medical tool device according to Claim 8 characterized in that the translation securing device (32a) has at least one securing element (34a) which, in the securing state, provides a stop (36a) for the shaft (14a, 14b) and which is at least substantially perpendicular to the receiving direction (12a, 12b) of the shaft Shaft (14a, 14b) is displaceable. Medical tool device according to Claim 9 characterized in that the securing element (34a) has at least one first recess (38a; 38b) which is at least partially corresponding to the shaft (14a; 14b) and at least one second recess (40a; 40b) which has a cross section, which is at least substantially larger than a cross section of the shaft (14a, 14b), wherein the first recess (38a; 38b) and the second recess (40a; 40b) at least partially overlap. Medical tool device according to one of the preceding claims, characterized by a rotation lock (42a), which is provided in at least one operating state to prevent a rotational movement of the shaft (14a, 14b) relative to the shaft receptacle (10a). Medical tool device at least according to claims 8 and 11, characterized in that the anti-rotation device (42a) and the translation security (32a) are at least partially formed integrally with each other. Medical tool (44a; 44c; 44d), in particular medical hand tool, with at least one medical tool device according to one of the preceding claims.

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