SURGICAL GRIP WITH AN INTERNAL AND SPRING-BIASED ROTATION SECURING UNIT

Abstract

A surgical grip for receiving a handpiece shaft for conjoint rotation therewith and/or for receiving a medical tool in such a way as to transmit torque, includes a carrier sleeve on which at least one coupling component provided for coupling the handpiece shaft is attached such that the at least one coupling component can be brought to a coupled position and to an uncoupled position in the operating state, wherein the at least one coupling component can be brought into contact with an activation unit which is arranged between the carrier sleeve and to an outer actuation sleeve, wherein a rotation securing unit present inside the actuation sleeve acts on the activation unit in a spring-biased manner in the operating state such that the activation unit is held secure against rotation relative to the carrier sleeve.

Claims

1. A surgical grip for receiving a handpiece shaft for conjoint rotation therewith and/or for receiving a medical tool in such a way as to transmit torque, comprising a carrier sleeve on which at least one coupling component provided for coupling the handpiece shaft is attached such that the at least one coupling component can be brought to a coupled position and to an uncoupled position in an operating state in which disassembly of the surgical grip is excluded, wherein the at least one coupling component can be brought into contact with an activation unit which is arranged between the carrier sleeve and an outer actuation sleeve by actuation of which the at least one coupling component can be coupled and/or uncoupled via the activation unit, wherein the surgical grip defines a longitudinal axis that extends through a center of the surgical grip, and wherein the surgical grip comprises a rotation securing unit present inside the actuation sleeve which acts on the activation unit in a spring-biased manner in the operating state such that the activation unit is held secure against rotation relative to the carrier sleeve, wherein the actuation sleeve comprises a one-piece tubular body having open ends and a completely closed wall that surrounds the carrier sleeve.

2. The surgical grip according to claim 1, wherein the actuation sleeve is configured to be displaced in a disassembly state different from the operating state to a position enabling rotation of the activation unit.

3. The surgical grip according to claim 1, wherein the activation unit includes a closing sleeve and a stop sleeve separate therefrom and radially encompassing said closing sleeve.

4. The surgical grip according to claim 3, wherein the stop sleeve is attached to the actuation sleeve in a fixed manner.

5. The surgical grip according to claim 3, wherein the stop sleeve is connected to the actuation sleeve in an axially fixed manner with respect to the longitudinal axis and is adapted to be radially adjusted with respect to the longitudinal axis.

6. The surgical grip according to claim 3, wherein the actuation sleeve includes a shoulder or a bottom designed for catching the closing sleeve after covering an axial dead travel so as to uncouple the at least one coupling component.

7. The surgical grip according to claim 1, wherein the rotation securing unit is configured to be rotationally fixed with respect to the longitudinal axis but axially movable at the carrier sleeve with respect to the longitudinal axis.

8. The surgical grip according to claim 7, wherein the rotation securing unit includes one, two, three or more guiding arms being supported in a guiding groove or a guiding channel of the carrier sleeve.

9. The surgical grip according to claim 1, wherein the rotation securing unit is forced into contact with the activation unit via a rotation securing spring which bears against a portion or component fixed to the carrier sleeve.

10. The surgical grip according to claim 1, wherein front-face rotation securing tabs of the rotation securing unit in the operating state engage in rotation securing recesses which are arranged in the activation unit.

11. The surgical grip according to claim 1, wherein the rotation securing unit includes one, two, three or more guiding groove(s) which are engaged with guiding elements connected to the carrier sleeve.

12. The surgical grip according to claim 3, wherein the stop sleeve has one or more radial release grooves and one or more guiding grooves, the radial release grooves opening into the one or more guiding grooves.

13. The surgical grip according to claim 9, wherein front-face rotation securing tabs of the rotation securing unit in the operating state engage in rotation securing recesses which are arranged in the activation unit and wherein by axially displacing the rotation securing unit against a biasing force of the rotation securing spring, the stop sleeve is released and in this way the actuation sleeve is enabled to rotate into the disassembly position.

14. The surgical grip according to claim 5, wherein the stop sleeve is adapted to be locked at two, three or more positions.

15. The surgical grip according to claim 10, wherein the rotation securing recesses are arranged in the stop sleeve.

16. A surgical grip for receiving a handpiece shaft for conjoint rotation therewith and/or for receiving a medical tool in such a way as to transmit torque, comprising a carrier sleeve on which at least one coupling component provided for coupling the handpiece shaft is attached such that the at least one coupling component can be brought to a coupled position and to an uncoupled position in an operating state in which disassembly of the surgical grip is excluded, wherein the at least one coupling component can be brought into contact with an activation unit which is arranged between the carrier sleeve and an outer actuation sleeve by actuation of which the at least one coupling component can be coupled and/or uncoupled via the activation unit, wherein the surgical grip defines a longitudinal axis that extends through a center of the surgical grip, and wherein the surgical grip comprises a rotation securing unit present inside the actuation sleeve which acts on the activation unit in a spring-biased manner in the operating state such that the activation unit is held secure against rotation relative to the carrier sleeve, wherein the actuation sleeve is configured to be displaced in a disassembly state different from the operating state to a position enabling rotation of the activation unit.

17. The surgical grip according to claim 16, wherein the rotation securing unit is configured to be rotationally fixed with respect to the longitudinal axis but axially movable at the carrier sleeve with respect to the longitudinal axis.

18. A surgical grip for receiving a handpiece shaft for conjoint rotation therewith and/or for receiving a medical tool in such a way as to transmit torque, comprising a carrier sleeve on which at least one coupling component provided for coupling the handpiece shaft is attached such that the at least one coupling component can be brought to a coupled position and to an uncoupled position in an operating state in which disassembly of the surgical grip is excluded, wherein the at least one coupling component can be brought into contact with an activation unit which is arranged between the carrier sleeve and an outer actuation sleeve by actuation of which the at least one coupling component can be coupled and/or uncoupled via the activation unit, wherein the surgical grip defines a longitudinal axis that extends through a center of the surgical grip, and wherein the surgical grip comprises a rotation securing unit present inside the actuation sleeve which acts on the activation unit in a spring-biased manner in the operating state such that the activation unit is held secure against rotation relative to the carrier sleeve.

19. The surgical grip according to claim 18, wherein the rotation securing unit is forced into contact with the activation unit via a rotation securing spring which bears against a portion or component fixed to the carrier sleeve.

20. The surgical grip according to claim 18, wherein the rotation securing unit includes one or more guiding grooves that are engaged with guiding elements connected to the carrier sleeve.

Description

BRIEF DESCRIPTION OF THE DRAWING FIGURE(S)

[0042] Hereinafter, the invention shall be illustrated in detail by way of a drawing, wherein:

[0043] FIG. 1 shows a first embodiment of a surgical grip with an internal stop according to the invention in a perspective view,

[0044] FIG. 2 shows a second embodiment of a surgical grip according to the invention with the actuation sleeve being provided with recessed grips, in a representation comparable to FIG. 1,

[0045] FIG. 3 shows a lateral view of the embodiment of FIG. 1,

[0046] FIG. 4 shows a longitudinal section along the line IV across the embodiment of FIG. 3,

[0047] FIG. 5 shows a detailed representation of the area V of FIG. 4,

[0048] FIG. 6 shows a longitudinal section in the area of stop pins when the coupling is locked,

[0049] FIG. 7 shows a longitudinal section in the area of the stop pins when the coupling is opened,

[0050] FIG. 8 shows a longitudinal section in the area of coupling components of the ball type, with a locked coupling of the surgical grip of FIG. 6,

[0051] FIG. 9 shows a longitudinal section across the surgical handle of FIG. 7, wherein the section now is arranged in the area of the coupling components/balls again, when the coupling is opened,

[0052] FIG. 10 shows the interior of the surgical grip in a perspective view without an actuation sleeve, when the coupling is locked,

[0053] FIG. 11 shows a representation of the surgical grip without an actuation sleeve, when the coupling is opened,

[0054] FIG. 12 shows an overall view of the surgical grip in the longitudinal section located in the area of the stop pins, when the coupling is locked and a latching web is retracted,

[0055] FIG. 13 shows an overall view of the surgical grip in the longitudinal section, with the sectional plane being located in the area of the stop pins and the coupling is opened, with the latching web further being extended,

[0056] FIG. 14 shows a perspective view of the stop sleeve inserted in an activation unit,

[0057] FIG. 15 shows a perspective view of a support ring inserted in a rotation securing unit,

[0058] FIG. 16 shows a perspective view of a transmission sleeve inserted in a rotation securing unit,

[0059] FIG. 17 shows an overall view of the surgical grip in the longitudinal section, with the sectional plane being located in the area of the stop pins, when the disassembly position is adopted,

[0060] FIG. 18 shows an enlargement of the area XVIII of FIG. 17, wherein for disassembly the actuation sleeve is moved to the opening position of the coupling, then the latching web is fixed by a specific retaining tool, with the latching web including respective lateral notches, wherein the transmission sleeve is held at the rear/proximal position by the fixation of the latching web and then the actuation sleeve can be pushed forward until the radial release groove is provided level with the stop pins,

[0061] FIG. 19 shows a cutout representation of a longitudinal section of a surgical grip according to the invention, wherein the sectional plane is located in the area of the stop pins and an axial release groove is used for disassembly, wherein the rotation securing means of the transmission sleeve does no longer engage in the stop sleeve, which is why the actuation sleeve is rotatable anti-clockwise until the axial release groove of the stop sleeve is reached,

[0062] FIG. 20 shows a representation comparable to FIG. 19, with a final disassembly by removal being indicated by arrows, however, wherein in this position the actuation sleeve thus can be removed to the front, then the fixation of the latching web can be released and for repeated assembly no more fixation of the latching web is required, wherein further the actuation sleeve is pushed to the position of the axial release groove over the stop pins until the radial release groove is reached, and moreover the actuation sleeve is subsequently rotated clockwise until the stop pins are adjacent to the wall of the guiding groove, wherein by the spring force the transmission sleeve is automatically locked in the groove for rotation securing,

[0063] FIG. 21 shows an embodiment different from the one of the preceding figures and configurations in which the locking lugs and detent contours (alternately) engage in each other at the stop sleeve and, resp., the actuation sleeve, and

[0064] FIG. 22 shows a mode of representation comparable to FIGS. 19 and 20 making use of an angled handpiece and an actuation sleeve having recessed grips (similarly to FIG. 2), wherein the longitudinal section is located in the area of the stop pins and the clip springs of the stop sleeve are provided with locking lugs, with the latter engaging in corresponding detent contours of the actuation sleeve, and further the stop sleeve in this configuration is fixed in the axial direction by means of a circlip.

[0065] The figures are merely schematic and only serve for the comprehension of the invention. Like elements are provided with like reference numerals. Features of the individual embodiments may be exchanged for each other.

DETAILED DESCRIPTION

[0066] FIG. 1 shows a first embodiment of a surgical grip 1 according to the invention. The surgical grip 1 may also be referred to as handpiece. It is provided for receiving a handpiece shaft (not shown) and for receiving a medical tool such as a milling cutter (not shown). In the interior, it includes a carrier sleeve 2 which is such a central component relative to which possible movable elements are movable. Surrounding the carrier sleeve, an activation unit 3 clearly visible in FIG. 5 is provided.

[0067] Referring to FIG. 1, it is noted that, although the activation unit 3 and the carrier sleeve 2 are concentrically surrounded by an actuation sleeve 4, the actuation sleeve 4 is present at a distal end of the surgical grip 1, an energy supply unit is adapted to be coupled to a proximal end. As shown in FIG. 2, an appropriate connecting piece 5 may include a longitudinal axis which is inclined relative to the longitudinal axis of the remaining surgical grip 1.

[0068] In the embodiment shown in FIG. 2, the actuation sleeve 4 includes at least one recessed grip 6. Here two recessed grips 6 are contained. While the surgical grip 1 shown in FIG. 1 is represented to be straight/not angled, the surgical grip 1 shown in FIG. 2 is thus designed to be angled. Such straight surgical grip 1 is also shown in FIGS. 3 and 4.

[0069] Especially suited for the comprehension of the invention is further FIG. 5. There also a rotation securing unit 7 is shown. The rotation securing unit 7 comprises a transmission sleeve 8, a support ring 9 and a rotation securing spring/anti-rotation spring 10. With respect to the support ring 9 and the transmission sleeve 8, already now reference is made to FIGS. 15 and 16.

[0070] Referring to FIG. 5, it is outlined that the actuation sleeve 4 is the radially outermost component. Through openings 11 are present in a wall of the carrier sleeve 2 through which coupling components 12 (not shown in FIG. 5) (cf. e.g. FIGS. 8 and 9 in this respect) of the ball type 13 (cf. FIGS. 6 to 9) pass in order to couple and to retain a handpiece shaft not shown.

[0071] The activation unit 3 includes a stop sleeve 14 and a closing sleeve 15 separate therefrom. The closing sleeve 15 is arranged concentrically inside the stop sleeve 14 and includes such specific inner contour which becomes operatively correlated with the balls 13. On the proximal side of the closing sleeve 15, a pin rotation securing means 16 is provided.

[0072] A so-called tracing sleeve 17 is provided inside the carrier sleeve 2 so as to displace the coupling components 12 in due time out of the through openings 11.

[0073] In a circumferential notch on the inside of the actuation sleeve 4 an O-ring 18 is arranged.

[0074] Inside the carrier sleeve 2 also a tool coupling marked by the reference numeral 19 is visualized. In the area of the distal front-face end of the tool coupling 10 also the through openings 11 for realizing a ball attachment coupling 20 are provided. The carrier sleeve 2 may also be referred to as carrier, wherein the tracing sleeve 17 is disposed between the carrier sleeve 2 and the tool coupling 19. A compression spring 21 is also arranged between the tracing sleeve 17 and the tool coupling 19. At the proximal end of the actuation sleeve 4, an intermediate cover sleeve 22 is further located in a sealing manner. Said intermediate cover sleeve 22 is tightly connected, especially screwed, to the carrier sleeve 2. A tension spring 23 is mounted between the tool coupling 19 and the carrier sleeve 2.

[0075] A latching sleeve 24 acts on the proximal end of the transmission sleeve 8. Said latching sleeve 24 may also be configured in the type of and referred to as a latching web. Radially outside of the latching sleeve 24 an actuator for an opening slide of the tool coupling 19 is provided. The actuator is provided with the reference numeral 25.

[0076] Referring to FIG. 4, it is further added that a separate outer housing 26 is inserted for defining a grip area to the proximal direction.

[0077] In FIGS. 6 and 7, the activation unit 3 is shown with its stop sleeve 14 and its closing sleeve 15 in a locking position (FIG. 6) and, resp., an opening position (FIG. 7). The two operating states, viz. the locking position and the opening position, are defined by a stop at the stop pin 27.

[0078] In the locking position, a proximal part of the stop sleeve 14 abuts against the stop pin 27, whereas a distal part of the stop sleeve 14 abuts against the stop pin 27 in the opening position. Due to this fact, also axial displacement of the closing sleeve 15 is brought about, resulting in the corresponding positions as shown in FIGS. 8 and 9. While the balls 13 are blocked in the through opening 11 by the closing sleeve 15, viz. by the inner contour thereof, in the representation of FIG. 8 and thus the coupling is locked, in FIG. 9, viz. in the opening position, the balls 13 are released so that the coupling is opened.

[0079] The transmission sleeve 8 includes guiding arms 28 extending in an outwardly opening channel-type guiding groove 29 in the longitudinal/axial direction.

[0080] In FIG. 10 the coupling is locked, whereas in FIG. 11 the coupling is opened such that the stop pin 27 is guided to be axially movable in a stop pin guiding groove 30 of the stop sleeve 14, or vice versa. In the locked position (FIG. 10) the stop pin 27 resides in the proximal end portion of the stop pin guiding groove 30, whereas in the distal end portion of the stop pin guiding groove 30 it resides in the opened coupling position. The rotation securing spring 10 is in pressing contact with the support ring 9.

[0081] The stop pin 27 is has only such length that it can also immerse into a radial release groove 31 shown in FIG. 14 which then is transformed to an orthogonally branching axial release groove 32. The stop pin 27 enters the two release grooves 31 and 32 only when this is desired by the service staff, namely when the support ring 9 is displaced with the transmission sleeve 8 against the rotation securing spring 10 actively, using a latching web 33 (cf. FIGS. 12 and 13), in the proximal direction.

[0082] Therefore, as is also clearly visible from FIG. 13, a connecting element 34 is used for axially fastening a proximal end of a guiding arm 28 of the transmission sleeve 8 to a distal end of the latching web 33. Form closure and/or force closure is used for attaching the two components to each other.

[0083] On the outside of the stop sleeve 14 a mount retaining tab 35 is formed in the way of a clip spring 36. Said clip spring 36, especially 2, 3, 4, 5 of said clip springs 36, are dimensioned/provided/adapted for getting in non-positive and/or positive contact with the actuation sleeve 4.

[0084] At the proximal end of the stop sleeve 14, especially in the area of the proximal outlet of the axial release groove 32, rotation securing grooves 37 are present which are provided for interaction with rotation securing projections of the transmission sleeve 8. The rotation securing grooves 37 and the rotation securing projections 38 may as well be attached to the respective other component. The rotation securing groove 37 may also be referred to as rotation securing recess, whereas the rotation securing projection 38 may also be referred to as rotation securing tab.

[0085] It is further important that recesses 39 (see FIG. 16) kept available at the transmission sleeve 8, especially in the distal end portion, for a bayonet-type form closure having detent areas 40 for support lugs 41 to be introduced to the latter (see FIG. 15) are present on the inside of the support ring 9.

[0086] In the area of the proximal end of the guiding arms 28 (see FIG. 16) connecting element receiving notches 42 are provided.

[0087] In FIG. 17 tool application notches 43 are visualized at the latching web 33 and a bottom of the actuation sleeve 4 is provided with the reference numeral 44.

[0088] In FIG. 18 entering of the stop pin 27 into the radial release groove 31 is evident, just as in FIG. 17, although there a slightly smaller scale is applied. The further movement into the axial release groove 32 and then the exiting from the stop sleeve 14 is evident in FIGS. 19 and 20. The direction of removal is visualized by the arrow 45.

[0089] A surgical grip 1 different from the afore-discussed surgical grip embodiments is illustrated in FIGS. 21 and 22. It is a particular modification in this case that detent lugs 46 positively and/or non-positively engaging in preferably diametrically opposed detent contours 47 of the actuation sleeve 4 are present at the stop sleeve 14. The axial securing of the stop sleeve 14 is realized by a circlip 48.