Classifications

• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
  • A61B17/00—Surgical instruments, devices or methods
  • A61B17/16—Instruments for performing osteoclasis; Drills or chisels for bones; Trepans
  • A61B17/1613—Component parts
  • A61B17/162—Chucks or tool parts which are to be held in a chuck
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
  • B23B—TURNING; BORING
  • B23B31/00—Chucks; Expansion mandrels; Adaptations thereof for remote control
  • B23B31/02—Chucks
  • B23B31/10—Chucks characterised by the retaining or gripping devices or their immediate operating means
  • B23B31/107—Retention by laterally-acting detents, e.g. pins, screws, wedges; Retention by loose elements, e.g. balls
  • B23B31/1071—Retention by balls
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
  • B23B—TURNING; BORING
  • B23B2240/00—Details of connections of tools or workpieces
  • B23B2240/04—Bayonet connections
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
  • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
  • F04C2270/00—Control; Monitoring or safety arrangements
  • F04C2270/04—Force
  • F04C2270/042—Force radial
  • F04C2270/0421—Controlled or regulated
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
  • Y10T279/00—Chucks or sockets
  • Y10T279/17—Socket type
  • Y10T279/17666—Radially reciprocating jaws
  • Y10T279/17692—Moving-cam actuator
  • Y10T279/17743—Reciprocating cam sleeve
  • Y10T279/17752—Ball or roller jaws
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
  • Y10T279/00—Chucks or sockets
  • Y10T279/17—Socket type
  • Y10T279/17761—Side detent
  • Y10T279/17769—Pivoted or rotary
  • Y10T279/17777—Sleeved
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
  • Y10T279/00—Chucks or sockets
  • Y10T279/17—Socket type
  • Y10T279/17761—Side detent
  • Y10T279/17811—Reciprocating sleeve

Definitions

• the present invention relates to a quick release coupling for a surgical rotary tool such as a bone drill or a bone bur.
• Rotary tool during surgery are replaced, whether it is due to wear or because a drill with a different diameter or a milling machine with a different surface to be used.
• OP Rotary tool during surgery
• Tool change can be performed quickly and safely. Should a tool change be delayed, this affects not only the operator of the device but all the staff in the operating room, which then has to wait for the operator of the device.
• Tool holder is here, for example, the drill or the
• EP 0 056 266 A1 is a
• Quick change chuck revealed.
• these quick-change chuck has a rotary shaft, in the distal end of a tool holder is formed, which produces such a form fit with a tool to be inserted that the tool is not rotatable in the tool holder.
• the receiving areas of the tools are designed to hexagonal.
• a mushroom-shaped locking body is received in a radial opening of the lateral surface of the tool holder and biased towards the axis of rotation of the tool holder, so that when a tool is inserted into the receptacle, it enters a circumferential groove formed on the tool.
• this quick-change chuck consists of a large number of components, which are connected together undecomposable after their assembly.
• a plurality of cavities (e.g., spring housings) and slots are formed in which tissue and body fluids could accumulate and which are in a clinical setting.
• the spring is supported on a side wall of the support projection and on a snap ring, which engages in a groove of the rotary shaft.
• This tool chuck is also not dismountable and thus not sterilizable. Such a tool chuck can not be used for a surgical turning tool.
• a quick release coupling for a rotary surgical tool is provided with a
• Rotary shaft in the distal end surface of a receptacle is formed.
• This receptacle is adapted to rotatably receive a surgical lathe tool. This is usually accomplished by having the rear end of the tool and, accordingly, the inner wall surface of the receptacle with a polygonal and preferably hexagonal cross-section are formed.
• the rotary shaft has in the region of its distal end at least one radial projection and at least one radial
• a blocking body is arranged in the at least one opening.
• the locking body is held movable in the radial direction to the rotary shaft.
• the quick-release coupling also has a sleeve which is slidable with its proximal end over the distal end of the rotary shaft.
• the inner surface of the sleeve has an area in which the
• Inner diameter of the distal portion is reduced.
• the inner surface of the sleeve may have other areas, for example, a
• Forming contact surface for the below-mentioned elastic element is adapted to arrive at a movement in the distal direction in abutment against the at least one locking body and to urge him to the axis of the rotary shaft.
• an opposite movement of the sleeve in the proximal direction of the at least one locking body is released so that it can move at least as far radially outward that the inner end of the
• the sleeve has at least one slot having a first slot portion and at least one other
• the further slot portion is in communication with the first slot portion.
• the further slot portion with the first slot portion forms an angle ⁇ of at least 90 °.
• the further slot section may be the second, third or another slot section and may even be composed of a plurality of these slot sections. That the first one
• Slot portion extending from the proximal end of the sleeve means that it opens to the proximal end of the sleeve, so that the associated projection on the rotary shaft from the proximal end of the sleeve can be inserted into this slot.
• the slot may also be formed as a groove, which is provided on the inner wall of the sleeve, so the slot and the individual slot sections are not recognizable from the outside.
• the quick-release coupling has an elastic
• Element may either be part of one of the other two parts, may be fixedly mounted on one of the other two parts, or may be provided as a single third component.
• the quick release coupling can be easily and quickly disassembled for cleaning and sterilization, and then reassembled so that the quick release coupling does not have voids and narrow slots during cleaning and sterilization that are difficult to clean and sterilize.
• the number of components is maximally reduced, so that no complicated assembly and disassembly must be done.
• no tools are required for assembly and disassembly.
• the further slot section forms an angle of at least 90 ° with the first slot section.
• the sleeve must be at least against the frictional force about its axis, between the other slot portion and lateral projection on the
• Tool holder is formed and is caused by the elastic member to reach a position in which the sleeve is removable from the tool holder.
• the elastic element At an angle of more than 90 °, the elastic element must also be compressed so that rotation of the sleeve about its axis is possible.
• the elastic element is a spiral spring, which around the rotary shaft is arranged.
• this is completely covered by the sleeve in the assembled state.
• Spiral springs are well-known components in surgical equipment, so there is no doubt about the cleanability and
• Form fit is responsible with the tool, to be arranged proximally to the area in which the spring is arranged. At an outside
• the Invention is formed on the sleeve and / or on the rotary shaft, a contact surface for the elastic element.
• the elastic member may be formed so as to be applied to the outer surface of the
• Tool holder is provided so that the elastic element can be solved virtually force-free from the tool holder.
• the elastic member may be firmly connected to the tool holder, e.g. by being welded on. In this case, the elastic member can not depart from the tool holder so that it can not be lost.
• the blocking body is a ball and the opening points both sides of a reduced diameter compared to an intermediate section.
• a ball is particularly suitable as
• Locking body since it can be firstly installed in any position, which facilitates the installation process, and secondly can rotate in the opening, which reduces the friction when a tool in the
• Tool holder is introduced and thereby in contact with the
• the obturator is rotationally symmetric and on both sides, i. towards the tool and the contact surface, provided with a rounded surface, as shown in particular the ball.
• the first slot portion extends substantially in the distal direction and this first slot portion communicates at its distal end with the second slot portion which extends substantially in the radial direction.
• the slot sections must together perform three different functions, namely (1) to provide access for the peg, (2) to secure the quick-release coupling against inadvertent disassembly, and (3) a
• the task (4) can be fulfilled to temporarily lock the sleeve in the release position and / or the locking position.
• these three or four tasks are performed by the
• a slot section can fulfill several tasks together and a task on can extend a plurality of slot sections.
• the object (1) is always satisfied by the first slot portion because the first slot portion is defined as the slot portion opening toward the proximal end of the sleeve. It is important that the task (1) and the task (3) is not taken over by the same slot section, because then can not be sure that the quick-release coupling is not accidentally disassembled.
• the task (2) can be fulfilled by a separate slot section or by a slot section which alone or together with another slot section fulfills the task (1) or (3) and / or possibly also task (4).
• the directions used are explained below.
• the distal direction is the direction toward the tool tip and is opposite to the proximal direction extending toward the tool carrier.
• the radial direction is perpendicular to the proximal and distal directions and extends along the circumference of the tool holder and sleeve.
• the radial direction generally designates both possible directions of rotation.
• the opposite radial direction is the radial direction of one before
• Deviations that do not affect the functionality In the case of curved or curved slots, the direction is the shortest connection of both ends of a slot section on the lateral surface of the sleeve. Due to the cylindrical shape of the sleeve, all slots except curved purely distally or proximally extending slots. However, this should not be described by the term curved slots or curved slots. Rather, these terms stand for slots that have a curvature or bending even when unwinding the lateral surface of the sleeve on a plane. Accordingly, it can also multidimensionally curved or
• slot sections can also be formed stepwise, ie they may be composed of distal / proximal and radial / gegenradial sections.
• the first slot portion extends obliquely in the distal and radial directions and is at its distal end with the second
• the first slot section fulfills the tasks (1) and (2) and the second slot section fulfills the task (3).
• a release or locking of the tool (task (1)) in the first slot section fulfills the tasks (1) and (2) and the second slot section fulfills the task (3).
• Tool holder takes place here through the second slot section and disassembly or assembly (task (3)) by the first
• the sleeve must be rotated for disassembly and reassembly and pushed distally at the same time.
• the displacement of the sleeve can also be carried out distally by the elastic element.
• the third slot portion is step-shaped, it may be prevented that the tool is inadvertently released when the sleeve engages an object such as tissue.
• the sleeve can be removed by simply pushing in the proximal direction of the
• Locking position can be brought only in an intermediate position, from where initially a radial rotation is required to then the
• a radial step is formed in the first slot portion in the vicinity of the proximal edge of the sleeve. This step is intended to prevent the sleeve from jumping off of the tool holder due to the bias of the elastic element when the sleeve is in contact with the sleeve
• the elastic element can also be designed so that only a very small bias is applied to the sleeve in this position, so that when the projection is proximal to the radial stage, this remaining bias is no longer sufficient to the sleeve of the
• two or three slots are provided on a sleeve, which are arranged at equiangular intervals along the circumferential direction of the sleeve. Accordingly, an equal number of radial
• Projections are formed on the rotary shaft corresponding to
• each projection runs in a slot.
• the slots and projections are arranged at equal angular intervals, there is no wrong arrangement of the sleeve to the tool holder, as long as only a single projection is received in a slot.
• Invention are two or three radial openings in the side wall the tool holder are formed and in each opening a ball is arranged as a blocking body. This ball is held in the aperture by at least a portion of at least one edge of the
• Opening to the hole center is plastically deformed. In order to minimize the friction between edge and ball, it makes sense if at least approximately the entire edge along the perimeter of the
• Opening is plastically deformed towards the center of the opening.
• the plastic deformation is achieved for example by a hollow cylindrical stamp, which has a slightly larger diameter than the
• the ball can be held inwardly through the aperture by drilling the aperture, either first drilling a small through-hole and then a concentric and slightly larger blind hole. or by a drill, which has a smaller diameter in the region of its tip.
• the opening can also be provided on one side or on both sides with a thread, in which a constriction ring is screwed, which reduces the diameter of the opening of the opening.
• a constriction ring can also be otherwise introduced into the opening and fixed or mounted on the sleeve.
• Invention is provided in the region of the inner surface of the sleeve between the proximal portion and the distal portion of a step or an inclined surface.
• One step has the advantage that only a very short stroke of the sleeve in the distal / proximal direction is required to move from the release position to the locking position of the quick release coupling.
• An inclined surface has the advantage that no force peak occurs during the displacement and the sleeve is not temporarily stuck when the step on the one or more locking elements from lateral (ie axial) Direction is present.
• Other forms of contact surface are also possible, for example, the contact surface multi-stage, parabolic or
• the slot is designed such that it extends over the entire wall thickness of the sleeve.
• the at least one slot may also be formed as a groove, which is formed on the inner surface of the sleeve.
• this disadvantage has the disadvantage that the course of the slot sections for the user is not recognizable, so that handling of the quick-release coupling is difficult.
• this disadvantage can be compensated for by graphically indicating or recording the course of the slot sections on the outside of the sleeve. This achieves the advantage that the
• Invention is the surgical turning tool, in particular a drill or a milling cutter.
• the present invention can also be used for all other turning tools.
• FIG. 1A is a side view of a quick-release coupling according to the invention and of a suitable tool during the
• Fig. 1B is a side view of a quick release coupling of Fig. 1A in which a tool is locked
• Fig. 1C is a side view of a quick release coupling of Fig. 1A with the quick release coupling disassembled;
• Fig. 1D is a side sectional view corresponding to Fig. 1A;
• Fig. 1E is a side sectional view corresponding to Fig. 1B;
• Fig. 1F is a side sectional view corresponding to Fig. 1C;
• Fig. 2 are schematic side views of a section of the sleeves according to numerous embodiments of the present invention.
• FIG 3 are schematic sectional views of the sleeves according to various embodiments of the present invention.
• FIGS. 1 to 3 A first embodiment of the present invention will be described below in detail with reference to FIGS. 1 to 3. In particular, this embodiment is described with reference to Figs. 1, 2A and 3A.
• a quick-release coupling 100 has a rotary shaft 20 in the distal end surface of a
• Tool holder 24 is formed.
• the tool holder 24 rotatably receives the rear end 41 of a surgical rotary tool 40.
• the tool holder 24 is adapted to the hexagonal cross-sectional shape of the rear end 41 of the tool 40, which is shown in Figs. 1A and 1C.
• the individual surfaces 27 of the hexagonal tool holder 24 rest against the individual surfaces 42 of the rotary tool.
• the rotary shaft 20 has a radial in the region of its distal end 21 Projection 22 and two radial openings, wherein the
• Breakthroughs in Figures 1A to 1 C are not shown.
• a ball 25 is arranged as a blocking body, both of which are movable in the radial direction to the rotary shaft 20 and so can enter the circumferential groove 43 in the rear end 41 of the tool 40 when the rear end 41 of Tool 40 is located in the tool holder 24.
• the quick-release coupling 100 also has a sleeve 10 which is slidable with its proximal end over the distal end 21 of the rotary shaft 20.
• the inner surface of the sleeve 10 has an area in which the
• Inner diameter has. Only a circumferential groove on the
• the sleeve 10 also has a slot 1 1, 12, 13, which has a first slot portion 1 1, a second slot portion 12 and a third slot portion 13.
• the slot is formed in this embodiment as a continuous slot.
• the first slot portion 1 1 extends from the proximal end of the sleeve 10. At the distal end of the first
• Slot portion 1 1 the second slot portion 12 extends in the radial direction and at the other end is the third slot portion 13 which extends from the second slot portion 12 in the distal and proximal direction.
• the first and second slot sections 11, 12 and the second and third slot sections 12, 13 each form an angle ⁇ of 90 ° between them.
• a coil spring 30 urges the sleeve 10 in the distal direction relative to the rotary shaft 20.
• On the sleeve 10 and on the rotary shaft 20 each have a contact surface 23 and 1 10 is formed for the spring 30, as shown in FIG. 1 F can be seen.
• two annular recesses 19 are provided on its outer surface.
• the tool 40 shown in FIG. 1 is a twist drill with a hardened drill bit 44.
• This embodiment describes a quick release coupling that is easy and inexpensive to manufacture, is easy to use and quick and easy to dismantle and reassemble, so as to ensure a good cleaning and sterilization.
• FIG. 1 A particularly preferred second embodiment of the present invention will be described below in detail with reference to Figs. 1, 2F and 3C.
• the rotary shaft 20 of the second embodiment is identical to that of the first embodiment. Only the sleeve 10 differs from that of the first embodiment. Strictly speaking, only the inner surface of the sleeve 10 and the shape of the slot 1 1, 12, 13 differs.
• Sections 101 and 102 are provided.
• the term inclined refers to the sectional view in Fig. 3C.
• the inclined surface 103 is intended that the locking bodies, which are also balls in this embodiment, are gently forced into the groove 43 in the tool 40.
• the handling of the sleeve 10 can be made somewhat more pleasant, but this can also increase the required length of the sleeve 10, which in turn is not desirable.
• the slot of this embodiment is changed from the slot in the first embodiment in two areas.
• the first slot portion 1 1 in this embodiment a radial step 17, to jump off the sleeve of the rotary shaft 20 during the To prevent assembly or disassembly of the quick-release coupling.
• the radial step is realized in that in the first slot portion 11, which extends in this embodiment, for the most part in exactly distal direction, a region is provided in which the slot 11 extends in the radial direction. In fact, this section extends a bit in the proximal direction.
• the step 17 forms on its distal side a kind of bay, in which the projection 22 can come into contact. If in this position of the projection 22, a small biasing force by the spring 30 is applied to the sleeve 10, this ensures that the projection 22 is secured in this bay at the radial stage 17 quasi.
• the third slot portion 13 is formed stepwise. That is, the portion 13A of the third slot portion 13 extending proximally, and thus the slot portion, may be the one
• Tool 40 is locked in the tool holder 24 of the rotary shaft 20, relative to the region of the third slot portion 13 B, which extends distally and thus is the slot portion in which, if necessary, the tool 44 is released in the tool holder 24, radially offset.
• a radially extending portion 13C is provided between the two portions 13A and 13B of the third slot portion 13.
• the region 13C is therefore an extension of the second slot section 12.
• FIGS. 2 and 3 Further embodiments of the present invention are shown in FIGS. 2 and 3.
• Fig. 2 numerous different shapes for a slot in the sleeve 10 are shown.
• 2A to 2E show further embodiments in which the adjacent slot sections always form an angle ⁇ of 90 ° between them and extend either in the radial or in the distal / proximal direction.
• FIGS. 2G and 2H show two further exemplary embodiments, in which the slot sections all run diagonally or diagonally.
• Figs. 21 and 2J show embodiments in which diagonal and distal / proximal slot portions are combined.
• the angles ⁇ formed between the slot sections are significantly greater than 90 °.
• the reference numbers 14 always designate sections which serve to secure the current position of the sleeve 10 in the proximal / distal direction relative to the rotary shaft 20.
• Fig. 2 can of course also be combined appropriately.
• FIG. 3B yet another structure of the inner surface of the sleeve 10 is shown.
• This inner surface is formed in multiple stages and thus represents an intermediate solution between the embodiments of FIGS. 3A and 3C.
• the intermediate stages 104 and 105 serve to divide the relatively large step between the sections 101 and 102.

Landscapes

• Health & Medical Sciences (AREA)
• Surgery (AREA)
• Engineering & Computer Science (AREA)
• Life Sciences & Earth Sciences (AREA)
• Medical Informatics (AREA)
• Molecular Biology (AREA)
• Orthopedic Medicine & Surgery (AREA)
• Oral & Maxillofacial Surgery (AREA)
• Biomedical Technology (AREA)
• Heart & Thoracic Surgery (AREA)
• Dentistry (AREA)
• Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
• Animal Behavior & Ethology (AREA)
• General Health & Medical Sciences (AREA)
• Public Health (AREA)
• Veterinary Medicine (AREA)
• Mechanical Engineering (AREA)
• Surgical Instruments (AREA)
• Dental Tools And Instruments Or Auxiliary Dental Instruments (AREA)
• Gripping On Spindles (AREA)

Priority Applications (3)

Applications Claiming Priority (2)

Publications (1)

Family

ID=48790344

Family Applications (1)

Country Status (5)

Cited By (1)

Families Citing this family (11)

Citations (5)

Family Cites Families (12)

• 2012
  • 2012-05-08 DE DE201210207651 patent/DE102012207651A1/de not_active Withdrawn
• 2013
  • 2013-05-03 JP JP2015510755A patent/JP6129955B2/ja active Active
  • 2013-05-03 WO PCT/EP2013/059293 patent/WO2013167496A1/de not_active Ceased
  • 2013-05-03 EP EP13736783.5A patent/EP2846951B1/de active Active
  • 2013-05-03 US US14/399,120 patent/US9629640B2/en active Active

Patent Citations (5)

Also Published As

Similar Documents

Legal Events