Handle adapter for orthopedic cutting tools

Abstract

To provide a handle adapter for an orthopedic cutting tool.SOLUTION: A handle adapter for manipulating an orthopedic tool includes: a frame having a receptacle and first and second slots; a coupling assembly; and an actuation assembly. The frame has a proximal end portion and a distal end portion. The distal end portion includes the receptacle, the first and second slots, the coupling assembly and the actuation assembly. The receptacle is configured to receive a trunnion. The first slot communicates with the receptacle. The first slot can be partially formed by a first ramp and a second ramp. The second slot is separated from the first slot. The coupling assembly is received by and translates in the first and second slots. The actuation assembly is coupled to the coupling assembly and configured to drive the coupling assembly into engagement with the trunnion.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] This patent document generally relates to orthopedic tools. More particularly, this patent document relates to a handle adapter for use with orthopedic tools.

Background Art

[0002] During orthopedic surgery, various orthopedic surgical tools are used to cut or otherwise shape a portion of bone. Such orthopedic cutting tools can include broaches, reamers, rasps, and the like. Such cutting tools are typically operated by a surgeon using a handle. The handle can be integral with the cutting tool or removably separate. The handle is used to grip the surgical cutting tool during use and to apply the force for cutting and shaping bone during orthopedic surgery.

[0003] In some orthopedic procedures, it may be necessary to drill or ream the intramedullary canal of the bone. For example, in hip joint replacement, it may be necessary to replace the natural femoral head with a prosthetic stem affixed inside the femoral canal. Techniques for implanting the prosthetic stem can include preprocessing the femoral shaft axis to accommodate the prosthetic stem by matching the contour of the femoral shaft axis to the overall geometry of the prosthetic stem, which may include using a broach or rasp to ensure accurate placement and a good fit. For the purpose of facilitating the use of such broach or rasp tools, it may be useful to selectively remove the working part of the tool from the handle to facilitate accurate measurement of the location of the tool inside the femoral shaft axis, to facilitate cleaning of the tool, and for other reasons. Further, in recent years, power drivers have been developed for driving bone cutting using cutting tools. These power drivers are coupled to a handle. [[ID=十七]]

[0004] There are many detachable handles for use with cutting tools such as broaches, reamers, or files. However, these need improvement for various reasons.

[0005] Various handles, including those designed by the present applicant, are known for applications related to orthopedic cutting tools. Examples include Patent Documents 1 and 2, the entirety of which are incorporated herein by reference. The present inventors recognize that it is useful to have a selectively attachable handle adapter that securely connects to an orthopedic cutting tool. Furthermore, it is considered useful to be able to immediately disengage the handle adapter after use. While known handle adapters are generally effective, there is room for improvement. For example, known handle adapters have one or more drawbacks, including improper locking which can result in undesirable disengagement from the orthopedic cutting tool during use; loosening of the connection to the orthopedic cutting tool which results in excessive wear; low kinematic level which leads to loading of linkage components that cannot assist the extraction force; inability of the handle adapter to accommodate different coupling features; and undesirable point loading. These drawbacks can lead to undesirable wear, component failure, undesirable coupling, complete disengagement, and undesirable results. [Prior art documents] [Patent Documents]

[0006] [Patent Document 1] U.S. Patent No. 10,667,798 [Patent Document 2] U.S. Patent No. 11,602,359 [Overview of the project] [Problems that the invention aims to solve]

[0007] With these drawbacks in mind, the inventors of the present invention have developed a handle adapter with simplified kinematics for coupling and uncoupling. These simplified kinematics may include the use of linear translational motion of the coupling assembly coupling the handle adapter to the cutting tool, compared to commonly used rotational engagements. The handle adapters disclosed herein further enjoy the benefits derived from a design based on pull-out force against a desired component, such as a frame, without passing through linkage components. The pull-out force is similarly based against multiple locations on the frame rather than being generated by an undesirable component such as a spring in a single location and / or a starter assembly. The handle adapters disclosed herein can similarly accommodate different trunnion designs with minimal changes to components or features. [Means for solving the problem]

[0008] The inventors of the present invention have similarly developed a handle adapter having a passive locking system that allows for easy stopping of the lever, reduces lever vibration, and simultaneously allows a spring force to maintain the lever in the closed position and / or the coupling assembly engaged with the cutting tool.

[0009] The following non-limiting embodiments detail some aspects of the subject matter that solve the problems and, in particular, provide the benefits discussed herein.

[0010] Embodiment 1 is a handle adapter for operating an orthopedic tool, optionally comprising a frame having a proximal end portion and a distal end portion, the distal end portion comprising a receptacle configured to accommodate a trunnion of an orthopedic tool, a first slot communicating with the receptacle, the first slot being partially formed by a first ramp and a second ramp, and a second slot spaced apart from the first slot, a coupling assembly housed by the first slot and the second slot, the coupling assembly translating within the first slot and the second slot, and a start assembly coupled to the coupling assembly and configured to drive the coupling assembly to engage with the trunnion.

[0011] In Example 2, the subject of Example 1 optionally includes a start assembly comprising a spring coupled to a lever, the spring being coupled to a coupling assembly, and driving the coupling assembly to engage with the trunnion.

[0012] In Example 3, the subject of Example 2 includes the spring being subjected to a compressive load when the coupling assembly is engaged with the trunnion.

[0013] In Example 4, the subject matter of Examples 2 to 3 optionally includes a fixing mechanism for fixing the handle to the frame in a closed position, the fixing mechanism including a spring formed by the frame.

[0014] In Example 5, the themes of Examples 1 to 4 optionally include the first ramp being angled obliquely with respect to the second ramp, the first ramp being configured to pass the contact head of the coupling assembly to a position partially inside the trunnion notch or adjacent to the trunnion notch, and the second ramp being configured to engage the contact head with the trunnion inside the notch.

[0015] In Example 6, the subject matter of Examples 1 to 5 is extended to include the fact that the second slot is formed at least partially by rails, and the first ramp, the second ramp, and the rails work together to guide the translation of the coupling assembly within each of the first and second slots.

[0016] In Example 7, the subject of Example 6 optionally includes being configured such that the first ramp, the second ramp, and the rail release at least a portion of the coupling force resulting from the engagement of the trunnion and coupling assembly with respect to the frame, thereby reducing the coupling force on the starting assembly.

[0017] In Example 8, the subject matter of Examples 1 to 7 optionally includes the fact that a frame forms the distal end of the second slot, and the engagement with the distal end restricts the progress of the coupling assembly along the first slot.

[0018] In Example 9, the themes of Examples 1 to 8 optionally include the configuration of a frame as a stationary cam and a coupling assembly as a follower guided by the stationary cam.

[0019] In Example 10, the subject matter of Examples 1 to 9 optionally includes a coupling assembly comprising a first column, a second column, and a linkage member extending between the first and second columns, wherein the first column is housed in a first slot, the second column is housed in a second slot, and the linkage member at least partially houses the distal end portion of the launch assembly.

[0020] In Example 11, the themes of Examples 1 to 10 optionally include the configuration in which the proximal end portion of the frame is coupled with a powered driver.

[0021] Example 12 is a handle adapter for operating an orthopedic tool, optionally including a frame having a proximal end portion and a distal end portion, wherein the distal end portion is a receptacle configured to receive the trunnion of the orthopedic tool, a first slot in communication with the receptacle, the first slot being partially formed by a first ramp and a second ramp, and a second slot spaced from the first slot and at least partially formed by a rail; a frame including the second slot; a coupling assembly received by the first slot and the second slot; and an activation assembly configured to drivingly engage the coupling assembly to engage the trunnion, wherein the first ramp, the second ramp, and the rail are configured to release at least a portion of the coupling force resulting from the engagement of the trunnion and the coupling assembly with respect to the frame, thereby reducing the coupling force on the activation assembly.

[0022] In Example 13, the subject matter of Example 12 optionally includes that the proximal end portion of the frame is configured to couple with a power driver.

[0023] In Example 14, the subject matter of Examples 12 to 13 optionally includes that the coupling assembly includes a first strut, a second strut, and a linkage member extending between the first strut and the second strut, the first strut being received in the first slot, the second strut being received in the second slot, and the linkage member at least partially receiving the distal end portion of the activation assembly.

[0024] In Example 15, the subject matter of Examples 12 to 14 optionally includes that the second slot is configured to limit the advancement of the coupling assembly along the first slot.

[0025] In Example 16, the subject matter of Examples 12 to 15 optionally includes that the first inclined path, the second inclined path, and the rail act together to guide the translation of the coupling assembly inside each of the first slot and the second slot, the first inclined path is configured to pass the contact head of the coupling assembly to a position adjacent to the notch of the trunion, and the second inclined path is configured to engage the contact head with the trunion inside the notch.

[0026] In Example 17, in a handle adapter for operating an orthopedic tool, optionally, a frame having a proximal end portion and a distal end portion, wherein the distal end portion is a receptacle configured to receive the trunion of the orthopedic tool, a first slot communicating with the receptacle, the first slot being partially formed by the first inclined path and the second inclined path, and a second slot spaced apart from the first slot; a coupling assembly accommodated by the first slot and the second slot; and an activation assembly configured to drivingly engage the coupling assembly to engage with the trunion, wherein the first inclined path is configured to pass the contact head of the coupling assembly to a position adjacent to the notch of the trunion, and the second inclined path is configured to engage the contact head with the trunion inside the notch.

[0027] In Example 18, the subject matter of Example 17 optionally includes that the second slot is at least partially formed by the rail, and the first inclined path, the second inclined path, and the rail act together to guide the translation of the coupling assembly inside each of the first slot and the second slot.

[0028] In Example 19, the subject matter of Examples 17 to 18 optionally includes the configuration that a first ramp leads the contact head of the coupling assembly to a position adjacent to the notch of the trunnion, and a second ramp leads the contact head to engage with the trunnion inside the notch.

[0029] Example 20 is a method for coupling an orthopedic tool to a handle adapter, optionally comprising the steps of: positioning the frame of the handle adapter to accommodate the trunnion of the orthopedic tool; translating a coupling assembly within the first and second slots of the frame, including along the first and second ramps of the first slot; and engaging the coupling assembly with the trunnion with the coupling assembly positioned on the second ramp.

[0030] Example 21 is at least one machine-readable medium containing instructions that, when executed by the processing circuit, cause the processing circuit to perform an action to implement any of Examples 1 to 20.

[0031] Example 22 is an apparatus that includes means for implementing any of Examples 1 to 20.

[0032] Example 23 is a system for implementing any of Examples 1 through 20.

[0033] Example 24 is a method for implementing any of Examples 1 through 20.

[0034] In Example 25, any one of Examples 1 to 24, or any combination thereof, of a handle adapter, machine-readable medium, system, or method can optionally be configured to allow the free use or selection of all listed elements or options.

[0035] In the drawings, similar numbers may be used to describe similar elements across multiple figures. Similar numbers with different subscripts may be used to represent different figures or features of similar elements. The drawings generally illustrate, but not limitingly, various embodiments discussed herein. [Brief explanation of the drawing]

[0036] [Figure 1] Figure 1 is a cross-sectional view of a handle adapter coupled with a broach according to at least one embodiment of the present disclosure. [Figure 2] Figure 2 is a perspective view of the handle adapter of Figure 1, relating to at least one embodiment of the present disclosure, with some of its internal components indicated by dashed lines. [Figure 3] Figure 3 is a perspective view of a connecting assembly including a support column and a linkage member according to at least one embodiment of the present disclosure. [Figure 4] Figure 4 is a side view of a handle adapter relating to at least one embodiment of the present disclosure, in which the startup assembly and coupling assembly portions are indicated by dashed lines. [Figure 5A-5B] Figures 5A and 5B show the linear translational movement of the coupling assembly of the trunnion and handle adapter of an orthopedic tool to the frame from the disengaged position in Figure 5A to the engaged position in Figure 5C, according to at least one embodiment of the present disclosure. [Figure 5C-5D] Figure 5C shows the linear translational movement of the coupling assembly of the trunnion and handle adapter of the orthopedic tool to the frame from the disengaged position in Figure 5A to the engaged position in Figure 5C, according to at least one embodiment of the present disclosure, and Figure 5D shows the linear translational movement of the coupling assembly of the handle adapter to the frame to the lever locked position with the orthopedic tool removed, according to at least one embodiment of the present disclosure. [Figure 6A-6B]Figures 6A and 6B show the distal end portion of another embodiment of the trunnion of a second orthopedic tool according to at least one embodiment of the present disclosure and another embodiment of the handle adapter in which the coupling assembly is engaged. [Figure 7A] Figure 7A shows the activation of the components of the handle adapter of Figures 6A and 6B, including the operation of the fixing mechanism according to at least one embodiment of the present disclosure. [Figure 7B] Figure 7B shows the activation of the components of the handle adapter of Figures 6A and 6B, including the operation of the fixing mechanism according to at least one embodiment of the present disclosure. [Figure 7C] Figure 7C shows the activation of the components of the handle adapter of Figures 6A and 6B, including the operation of the fixing mechanism according to at least one embodiment of the present disclosure. [Figure 7D] Figure 7D shows the activation of the components of the handle adapter of Figures 6A and 6B, including the operation of the fixing mechanism according to at least one embodiment of the present disclosure. [Figure 7E] Figure 7E shows the activation of the components of the handle adapter of Figures 6A and 6B, including the operation of the fixing mechanism according to at least one embodiment of the present disclosure.

[0037] Corresponding reference letters indicate the corresponding parts throughout multiple figures. The examples contemplated herein illustrate exemplary embodiments of the disclosure and should not be considered to limit the scope of the disclosure in any way. [Modes for carrying out the invention]

[0038] Figures 1 to 7E illustrate various embodiments of a handle adapter for removably coupling with and operating orthopedic cutting tools such as broaches. Although the embodiments described herein are shown coupled to and detached from broaches, it is intended that other tools can be used with the handle adapter embodiments of this application. These orthopedic tools may, but are not limited to, files, awls, reamers, angle drivers, twist drills, flexible drills, cannula insertion drills, bayonet drills, bayonet taps, drill guides, angle-adjustable drill guides, taps, and cannula insertion taps.

[0039] Figure 1 shows a cross-sectional view of a handle adapter 100 according to one embodiment. The handle adapter 100 is shown coupled to an orthopedic tool 102 (also shown in a cross-sectional view) having a trunnion 103. The handle adapter 100 may include a frame 104, a coupling assembly 106, and a start-up assembly 108. The frame 104 may include a proximal end portion 110, an intermediate portion 112, a distal end portion 114, a receptacle 116, and a recess 118.

[0040] Figure 1 shows a handle adapter 100 coupled and engaged with an orthopedic tool 102 via a coupling assembly 106. More specifically, the frame 104 may be configured to house the trunnion 103 of the orthopedic tool 102 via a receptacle 116 at its distal end portion 114. Once housed within the receptacle 116, the trunnion 103 can be selectively engaged by the coupling assembly 106 as it is driven by the activation assembly 108 and held in place using this coupling assembly.

[0041] As shown in Figure 1, the frame 104 has an elongated length extending from a proximal end portion 110 and an intermediate portion 112 to a distal end portion 114. The proximal end portion 110 can be configured to be coupled with a driver (not shown), such as a power tool that can be used to vibrate or otherwise move a handle adapter 100 and an orthopedic tool 102, which are known in the art. According to other embodiments, the proximal end portion can be configured for manual operation by including a striking plate or other feature portion. The frame 104 may have a single-piece structure in which the proximal end portion 110 is formed integrally with the intermediate portion 112 and the distal end portion 114.

[0042] The intermediate portion 112 may include one or more walls (not shown) surrounding the recess 118. The recess 118 may extend to the distal end portion 114. The recess 118 can accommodate components including parts of the coupling assembly 106 and the activation assembly 108. The activation assembly 108 is movably coupled to the intermediate portion 112 of the frame 104 by a first pin 120 on which a part of the activation assembly 108, such as a lever, can pivot. The coupling assembly 106 can be coupled to the activation assembly 108, for example, via a second pin 122. The second pin 122 may be constrained by engagement with the frame 104 to facilitate linear movement of the activation assembly 108 and the coupling assembly 106 relative to the frame 104, as will be discussed further herein. The coupling assembly 106 may engage with the distal end portion 114 of the frame 104 and have induced and controlled movement toward it, as will be discussed further below. In particular, the frame 104 can be configured as a stationary or fixed cam, and the coupling assembly 106 is configured as a follower that is guided by the stationary cam (frame 104) (driven by the activation assembly 108) to be coupled and engaged with the orthopedic tool 102, as shown in Figure 1.

[0043] The activation assembly 108 may include a member 124, for example, a rod, linkage bar, shaft, or spring 126, a third pin 128, and a lever 130. The member 124 may be housed in a recess 118 and coupled to the coupling assembly 106 at its distal end. The third pin 128 may be housed in the recess 118 at the proximal end of the member 124. The member 124 may be coupled to the lever 130 by the third pin 128. The lever 130 may be coupled to the frame 104 for pivotal movement by a first pin 120. Thus, the first pin 120 may include, for example, a hinge pin. The lever 130 may extend from a recess 118 outside the frame 104. The lever 130 can be configured as a handle for gripping the member 124 and initiating its movement relative to the frame 104.

[0044] Member 124 may be a linkage between the lever 130 and the coupling assembly 106. Member 124 may be an elastic component that can flex during operational use. Thus, member 124 can be configured as a spring 126. The spring 126 may have a generally curved or arc-shaped portion between the coupling ends that house the second pin 122 and the third pin 128, respectively. The spring 126 may be positioned such that the curved or arc-shaped portion is inside the recess 118. The spring 126 may be subjected to a compressive load when the coupling assembly 106 is engaged with the trunnion 103.

[0045] Figure 2 shows a perspective view of the handle adapter 100, including the frame 104, with the components of the start assembly 108, including the connecting assembly 106 and member 124, indicated by dashed lines. The orthopedic tool 102 is not shown in Figure 2.

[0046] Figure 3 is a perspective view of a coupling assembly 106 according to one embodiment. The coupling assembly 106 may include a first contact head 132 configured as a first column or projection 134, a linkage member 136, and a coupling receptacle 138. The first contact head 132 may project laterally from the linkage member 136 toward its opposite side. The linkage member 136 may have arms 136A and 136B connected by the first contact head 132. The linkage member 136 can be configured as an open frame having arms 136A and 136B that extend longitudinally in a generally spaced-out relationship. The arms 136A and 136B may be spaced apart from each other to create a recess 139 configured to accommodate the distal end of a member 124 (not shown). The arms 136A and 136B may form a coupling receptacle 138 at their proximal end portions. The coupling receptacle 138 may be configured to house a second pin 122 (Figure 1) internally, for example, as further discussed and illustrated with reference to Figures 5A to 5C.

[0047] With respect to the coupling assembly 106, the first contact head 132 may include, for example, a first post or pin. The second pin 122 (Figure 1) can act as a second post. The linkage member 136 may extend between the first post (first contact head 132) and the second post (second pin 122, see Figure 1). Thus, as will be further discussed below with respect to Figures 4 to 5C, the first post may be housed in a first slot, the second post may be housed in a second slot, and the linkage member 136 may house at least partially the distal end portion of the start assembly 108.

[0048] Figure 4 shows the handle adapter 100 in the disengaged position from the orthopedic tool 102. Figure 4 is a side view of the handle adapter 100 with the lever 130 lifted at a certain angle from the frame 104, and the components of the activation assembly 108 and coupling assembly 106, shown by the dashed lines, moved away from engagement with the orthopedic tool 102. Figure 4 further shows some of the components discussed earlier, including the first pin 120, the second pin 122, member 124, and the third pin 128. Furthermore, Figure 4 illustrates that the frame 104 at the distal end portion 114 may include a first slot 140 and a second slot 142. The first slot 140 can communicate with the receptacle 116 and is configured to accommodate multiple parts of the coupling assembly 106, such as the first contact head 132. The second slot 142 is configured to accommodate the second pin 122 inside. The first slot 140 and the second slot 142 can both induce linear movement of the coupling assembly 106 to a locked-engaged state with the orthopedic tool 102 and to a disengaged state. Furthermore, the frame 104 forming the first slot 140 and the second slot 142 can release at least a portion of the pulling force resulting from the engagement of the orthopedic tool 102 and the coupling assembly 106 with respect to the frame 104, thereby reducing the reaction force on the starting assembly 108 as a result of the tension between the coupling assembly 106 and the orthopedic tool 102.

[0049] Figures 5A to 5C show an example of the relationship between the orthopedic tool 102 and the trunnion 103, and the linear translational movement of the coupling assembly 106 of the handle adapter 100 relative to the frame 104, from the disengagement position in Figure 5A (also shown earlier in Figure 4) to the engagement position in Figure 5C.

[0050] Figures 5A to 5C show a side view of the handle adapter 100, including portions of the components of the starter assembly 108 and coupling assembly 106, which are shown by dashed lines because they are expected to be covered by the frame 104. Figures 5A to 5C show the distal end portion 114, which includes a first slot 140 and a second slot 142. The first slot 140 can accommodate a first contact head 132, and the second slot 142 can accommodate a second pin 122.

[0051] As shown in Figures 5A to 5C, a portion of the frame 104 defines a first slot 140, and the frame 104 may have a first ramp 150, a transition section 152, and a second ramp 154 ​​that define a portion of the first slot 140. The first ramp 150 and the second ramp 154 ​​may form one or more edges of the first slot 140. The first ramp 150 may be angled with respect to the second ramp 154 ​​(for example, angled diagonally). The transition section 152 may be located between the first ramp 150 and the second ramp 154 ​​and may be a point or area on the frame 104.

[0052] According to one embodiment, the first ramp 150 can be configured (oriented, angled, positioned, and sized) so that the first contact head 132 can pass through the notch 156 of the trunnion 103. In other words, the first ramp 150 can allow at least a portion of the first contact head 132 to pass into the notch 156. Thus, the first ramp 150 can be configured to allow the first contact head 132 to pass partially into a position inside the notch 156 of the trunnion 103 or to a position adjacent to the notch. The transition portion 152 can be positioned on the opposite side of the first engagement point of the first contact head 132 with the trunnion 103. The second ramp 154 ​​can be configured (oriented, angled, positioned, and sized) so that the first contact head 132 engages incrementally with the trunnion 103 with increasing force as the first contact head 132 advances further along the second ramp 154 ​​from the transition section 152. Thus, the second ramp 154 ​​can be configured to engage the first contact head 132 with the trunnion 103 within the notch 156.

[0053] Figures 5A to 5C show a second slot 142 that can be separated from the first slot 140 by the distal end portion 114 of the frame 104. The second slot 142 may be at least partially formed by a rail 158. The rail 158 may be formed by one or more edges of the frame 104 along the second slot 142. The rail 158 may be configured to prevent linear movement of the start assembly 108 and the coupling assembly 106 as the second pin 122 is housed in the second slot 142 and engages with the rail 158. The second pin 122 may selectively advance along the second slot 142 while its movement is prevented by the rail 158, as illustrated in Figures 5A to 5D.

[0054] Figure 5A shows the coupling assembly 106 moved to the disengaged position of the orthopedic tool 102 with respect to the trunnion 103. The coupling assembly 106 is moved to a position where the first contact head 132 is in contact with the first ramp 150, and the second pin 122 is positioned on the rail 158 at or adjacent to the proximal end of the second slot 142.

[0055] Figure 5B shows the coupling assembly 106 moved to its initial engagement position with respect to the trunnion 103, with the first contact head 132 engaged with the trunnion 103 and resting on the transition portion 152. The second pin 122 is advancing distally along the second slot 142 on the rail 158.

[0056] Figure 5C shows the coupling assembly 106 moved to a second engagement position with respect to the trunnion 103, with the first contact head 132 engaged with the trunnion 103 and resting on the second ramp 154. The second pin 122 has advanced further distally on the rail 158 to a position adjacent to the distal end of the second slot 142. As shown in Figures 5A to 5C, the first ramp 150, the second ramp 154, and the rail 158 together guide the translation of the coupling assembly 106 within either the first slot 140 or the second slot 142.

[0057] Figure 5D shows the trunnion 103 removed from its position housed by the frame 104, and the coupling assembly 106 and starter assembly 108 moved to a locked position relative to the frame 104. The advance of the coupling assembly 106 and starter assembly 108, including the first contact head 132 along the first slot 140, can be limited by contact of the second pin 122 with the distal end 142A of the second slot 142. The first contact head 132 can remain on the second ramp 154. In the locked position, a lever (not shown) can be moved downward to a position adjacent to the frame 104 (e.g., at an angle of zero or near zero).

[0058] Figures 6A and 6B show another embodiment of a handle adapter 200 that engages with a trunnion 203 of an orthopedic tool 202. Figures 6A and 6B show a side view of the handle adapter 200, and portions of the components of the launch assembly 108 and coupling assembly 106 are shown with dashed lines because they are presumably covered by the frame 204. The handle adapter 200 may include components such as the launch assembly 108 and coupling assembly 106 similar to those discussed earlier, although the frame 204 is modified. The frame 204 is modified due to the different geometry of the trunnion 203, including having a notch 256 with a different geometry than that of the trunnion 103 discussed earlier (Figures 5A to 5C). The different geometry of the trunnion 203 may include, for example, a longer length and a different geometry of the notch 256.

[0059] As shown in Figures 6A and 6B, the handle adapter 200 includes a distal end portion 214 with a first slot 240 and a second slot 242. The first slot 240 and the second slot 242 can be configured with different geometric shapes from the first slot 140 and the second slot 142 discussed earlier. The first slot 240 can accommodate a first contact head 132, and the second slot 242 can accommodate a second pin 122.

[0060] Frame 204 defines a first slot 240, and frame 204 may have a first ramp 250, a transition section 252, and a second ramp 254 that define a portion of the first slot 240. The first ramp 250 and the second ramp 254 may form one or more edges of the first slot 240. The first ramp 250 may be angled with respect to the second ramp 254 (for example, angled diagonally). The transition section 252 may be located between the first ramp 250 and the second ramp 254 and may be a point or area on frame 204.

[0061] The first ramp 250 can be configured (oriented, angled, positioned, and sized) to allow the first contact head 132 to pass through the notch 256 of the trunnion 203. For example, the first ramp 250 can be oriented substantially parallel to the surface of the trunnion 203 that forms part of the notch 256 at the opening. The first ramp 250 can allow at least a portion of the first contact head 132 to pass into the notch 256. Thus, the first ramp 250 can be configured to allow the first contact head 132 to pass partially into the notch 256 of the trunnion 203 or to a position adjacent to the notch. The transition portion 252 can be positioned opposite the first engagement point of the first contact head 132 with the trunnion 203. The second ramp 254 can be configured (oriented, angled, positioned, and sized) so that the first contact head 132 engages incrementally with the trunnion 203 with increasing force as the first contact head 132 advances further along the second ramp 254 from the transition section 252. Thus, the second ramp 254 can be configured to engage the first contact head 132 with the trunnion 203 within the notch 256.

[0062] As shown in Figures 6A and 6B, the second slot 242 may be formed at least partially by a rail 258. The rail 258 may be formed by one or more edges of the frame 204 along the second slot 242. The rail 258 may be configured to prevent linear movement of the start assembly 108 and the coupling assembly 106 as the second pin 122 is housed in the second slot 242 and engages with the rail 258.

[0063] Figures 6A and 6B show the coupling assembly 106, in particular the first contact head 132 engaged with the trunnion 203. Figure 6B shows the vector decomposition of the pulling force that occurs with such engagement during the use of the orthopedic tool 202. Figure 6B shows that the entire pulling force is not transmitted to the starting assembly 108, in particular the member 124, but rather at least a portion of the pulling force resulting from the coupling of the first contact head 132 with the trunnion 203 is decomposed against the frame 204. Arrow (1) shows the vector of the pulling force from the trunnion 203 to the first contact head 132. Arrow (1a) shows the immediate release of at least a portion of this pulling force against the frame 204 in the second ramp 254. In the event that the first contact head 132 slides down to the transition portion 252, arrow (1b) indicates that the first contact head 132 remains engaged with the trunnion 203, thus leaving a release from the frame 204. The force vector indicated by arrow (1b) can generally be aligned with the pull-out force indicated by arrow (1). The force vector applied by member 124 and the start assembly 108 (indicated by arrow (3)) can maintain the engagement between the first contact head 132 and the trunnion 203. Force vector (2) indicates that the second pin 122 and the frame 204 react to the pull-out force on the coupling assembly 106 such that at least a portion of the pull-out force is supported by the frame 204, rather than the entire pull-out force being transmitted to member 124 and the start assembly 108.

[0064] Figures 7A to 7E show other embodiments of the handle adapter 200, in particular, a locking mechanism 300. The locking mechanism 300 can be used to reduce vibration of the lever 130 when driven by a powered driver, to maintain the lever 130 in a locked position adjacent to the frame 204, and / or to maintain the coupling assembly 106 engaged with the trunnion 203. The frame 204 and the starter assembly 108 are modifiable using the locking mechanism 300.

[0065] The fixing mechanism 300 may include a third slot 302, a fourth slot 304, a spring 306, a seat 308, a pin support 310, and a third pin 128. The fixing mechanism 300 may be positioned in the middle or proximal portion of the frame 204, and may be positioned adjacent to the recess 118 discussed earlier. As shown in Figure 7A, the fixing mechanism 300 can be positioned to connect and interact with the member 124 and the lever 130. Figure 7A shows portions of the coupling assembly 106 and the launch assembly 108 with dashed lines.

[0066] As shown in Figure 7A, the third slot 302 may be formed by the frame 204 and may have a longitudinal extension along the longitudinal axis LA, as well as generally extending laterally across the longitudinal axis LA. The shape of the third slot 302 may be an arc having a first end 312 and a second end 314. The first end 312 of the third slot 302 can accommodate the third pin 128 when the lever 130 is in the open (disengaged) position shown in Figure 7A. The third pin 128 can advance along the third slot 302 toward the second end 314 as the lever 130 closes toward the engaged position (not shown in Figure 7A). The spring 306, seat 308 and pin support 310 may be positioned adjacent to the second end 314 of the third slot 302. The spring 306 may be formed from the frame 204 and may define, for example, a portion of the third slot 302. However, in other embodiments, the spring 306 is intended as a separate and dedicated component from the frame 204.

[0067] The seat portion 308 may be formed by the frame 204 at the second end 314 of the third slot 302, and further formed on the second side by the pin support 310. The pin support 310 may be a projection configured to accommodate a portion of the third pin 128. The pin support 310 may be positioned on the opposite side of the engaging head 316 of the spring 306.

[0068] The fourth slot 304 can be formed, for example, by the distal portion of the lever 130. The fourth slot may have an elongated length and may be configured to accommodate the third pin 128. The fourth slot 304 can generally be positioned adjacent to the third slot 302, since both the third slot 302 and the fourth slot 304 accommodate the third pin 128. The fourth slot 304 allows the lever 130 to have some play / movement relative to the third pin 128. The third pin 128 can also be accommodated by an aperture or slot of member 124, as shown in Figure 7A.

[0069] Figures 7B to 7E show the engagement movement of the starting and coupling assemblies from the disengaged position in Figure 7A. Figure 7B shows the first contact head 132 moved to the initial disengagement with the trunnion 203. The third pin 128 has advanced to an intermediate position along the third slot 302 between the first end 312 and the second end 314. Figure 7C is an enlarged view from Figure 7B showing the vector representation of the forces on the third pin 128 (V1 from the spring 124 and V2 from the frame 204). The lever 130 does not sense the force from member 124 (see Figure 7A). Rather, the force from member 124 (Figure 7A) is broken down into the frame 204, and in particular, the force is applied to the rails forming the edge of the third slot 302. This arrangement of forces can reduce wear on the lever 130 and lever pin 120 (Figure 7A).

[0070] Figure 7D shows the starter assembly 108 and the coupling assembly 106 moved to a fully engaged position with the coupling assembly 106 in contact with the trunnion 203. The lever 130 can be held in contact with or adjacent to the frame 204 at an angle of zero or near zero, as shown in Figure 7D. The locking mechanism 300 acts to lock / hold the starter assembly 108 and the coupling assembly 106 in a fully engaged position. Furthermore, the locking mechanism 300 acts to inhibit or reduce vibration of the lever 130 relative to the frame 204 during operation by the powered driver.

[0071] As shown in the enlarged view of Figure 7E, in the fully engaged position, with the fixing mechanism 300 holding the start assembly 108 and the coupling assembly 106, the third pin 128 can be housed in the seat 308 and engaged by the engaging head 316 and pin support 310 of the spring 306. The spring 306 can force the third pin 128 into the seat 308. Figure 7E shows a vector representation of the forces acting on the third pin 128 in the fully engaged position. The force (S) of the spring 306 on the third pin 128 is broken down into a force (RS) into the frame 204, as shown in Figure 7E. The force (RS) is applied not to the lever 130, but rather to the rail forming the edge of the third slot 302 in the seat 308. This reduces wear on the lever 130 and the lever pin 120 (Figure 7A), as discussed earlier.

[0072] The above detailed description includes references to accompanying drawings that form part of the detailed description. The drawings illustrate specific embodiments that can implement the steering assembly and related methods. These embodiments are also referred to herein as “Examples.” Although some embodiments are shown and described with respect to left or right steering orientation, it should be recognized that this disclosure is equally applicable to both left and right steering.

[0073] The above detailed description is intended to be illustrative rather than restrictive. For example, the embodiments (or one or more elements thereof) described above can be used in combination with each other. A person skilled in the art, having reconsidered the above description, can use other embodiments. Similarly, various features or elements can be combined. This should not be interpreted as meaning that any disclosed feature not claimed is essential to any claim. Rather, inventive subject matter may reside in fewer features than all the features of a particular disclosed embodiment. Accordingly, the following claims are incorporated here within the detailed description, and each claim stands alone as a separate embodiment. The scope of the invention should be determined in reference to the appended claims, along with the full equivalent scope to which such claims are entitled.

[0074] In this specification, the terms "a" and "an" are used to include one or more, independently of any other use or instance of "at least one" or "one or more." In this specification, the term "or" is used to mean non-exclusive, or, unless otherwise indicated, in a manner that "A or B" includes "A but not B," "B but not A," and "A and B." In this specification, "anterior" generally means the direction toward the front of the patient, "posterior" generally means the direction toward the back of the patient, "medial" generally means the direction toward the center of the patient, and "lateral" generally means the direction toward the side of the patient. In this specification, the terms "anterior / posterior direction" are used to include the direction from anterior to posterior or from posterior to anterior.

[0075] In the attached claims, the terms “generally,” “substantially,” and “about” mean within ±15% of the examples described. The terms “including” and “in which” are used as plain English equivalents of the terms “comprising” and “wherein.” The terms “including” and “comprising” are open-ended terms; that is, any apparatus, system, kit, or method including elements added to the elements listed after such terms in the claim is still considered to fall within the scope of that claim. Furthermore, in the following claims, terms such as “first,” “second,” and “third” are used merely as labels and are not intended to impose numerical requirements on their objects. According to embodiment (1), a handle adapter for operating orthopedic tools, A frame having a proximal end portion and a distal end portion, wherein the distal end portion is A receptacle configured to house the trunnion of the orthopedic tool, A first slot communicating with the receptacle, the first slot being partially formed by a first ramp and a second ramp, A second slot separated from the first slot, Frames, including A coupling assembly housed in the first slot and the second slot, wherein the coupling assembly translates within the first slot and the second slot, A start assembly is coupled to the coupling assembly and configured to drive the coupling assembly to engage with the trunnion, This is a handle adapter that includes [the necessary components]. According to embodiment (2), the starting assembly includes a spring coupled to a lever, the spring being coupled to the coupling assembly and driving the coupling assembly to engage with the trunnion. According to embodiment (3), when the coupling assembly is engaged with the trunnion, the spring is subjected to a compressive load. According to embodiment (4), the invention further includes a fixing mechanism for fixing the startup assembly to the frame in a closed position, wherein the fixing mechanism includes a spring formed by the frame. According to embodiment (5), the first ramp is angled obliquely with respect to the second ramp, and the first ramp is configured to pass the contact head of the coupling assembly to a position partially inside the notch of the trunnion or adjacent to the notch of the trunnion, and the second ramp is configured to engage the contact head with the trunnion inside the notch. According to embodiment (6), the second slot is formed at least partially by rails, and the first ramp, the second ramp and the rails work together to guide the translation of the coupling assembly inside each of the slots of the first and second slots. According to embodiment (7), the first ramp, the second ramp, and the rail are configured to release at least a portion of the coupling force from the engagement between the trunnion and the coupling assembly with respect to the frame, thereby reducing the coupling force on the starting assembly. According to embodiment (8), the frame forms the distal end of the second slot, and the engagement with the distal end restricts the progress of the coupling assembly along the first slot. According to embodiment (9), the frame is configured as a stationary cam, and the coupling assembly is configured as a follower guided by the stationary cam. According to embodiment (10), the coupling assembly includes a first support, a second support, and a linkage member extending between the first support and the second support, wherein the first support is housed in the first slot, the second support is housed in the second slot, and the linkage member at least partially houses the distal end portion of the launch assembly. According to embodiment (11), the proximal end portion of the frame is configured to be coupled with a powered driver. According to embodiment (12), a handle adapter for operating an orthopedic tool, A frame having a proximal end portion and a distal end portion, wherein the distal end portion is A receptacle configured to house the trunnion of the orthopedic tool, A first slot communicating with the receptacle, the first slot being partially formed by a first ramp and a second ramp, A second slot, separated from the first slot and at least partially formed by the rail, Frames, including A coupling assembly housed in the first slot and the second slot, A start assembly configured to drive the coupling assembly to engage with the trunnion, wherein the first ramp, the second ramp, and the rail are configured to release at least a portion of the coupling force from the engagement between the trunnion and the coupling assembly with respect to the frame, thereby reducing the coupling force on the start assembly, This is a handle adapter that includes [the necessary components]. According to embodiment (13), the proximal end portion of the frame is configured to be coupled with a powered driver. According to embodiment (14), the coupling assembly includes a first support, a second support, and a linkage member extending between the first support and the second support, wherein the first support is housed in the first slot, the second support is housed in the second slot, and the linkage member at least partially houses the distal end portion of the launch assembly. According to embodiment (15), the second slot is configured to restrict the progress of the coupling assembly along the first slot. According to embodiment (16), the first ramp, the second ramp, and the rail work together to guide the translation of the coupling assembly inside each of the first and second slots, the first ramp being configured to guide the contact head of the coupling assembly to a position adjacent to the notch of the trunnion, and the second ramp being configured to engage the contact head with the trunnion inside the notch. According to embodiment (17), a handle adapter for operating orthopedic tools, A frame having a proximal end portion and a distal end portion, wherein the distal end portion is A receptacle configured to house the trunnion of the orthopedic tool, A first slot communicating with the receptacle, the first slot being partially formed by a first ramp and a second ramp, A second slot separated from the first slot, Frames, including A coupling assembly housed in the first slot and the second slot, A starting assembly configured to drive the coupling assembly to engage with the trunnion, wherein the first ramp is configured to pass the contact head of the coupling assembly to a position adjacent to the notch of the trunnion, and the second ramp is configured to engage the contact head with the trunnion inside the notch, This is a handle adapter that includes [the necessary components]. According to embodiment (18), the second slot is formed at least partially by rails, and the first ramp, the second ramp and the rails work together to guide the translation of the coupling assembly inside each of the slots of the first and second slots. According to embodiment (19), the first ramp is configured to pass the contact head of the coupling assembly to a position adjacent to the notch of the trunnion, and the second ramp is configured to engage the contact head with the trunnion inside the notch. According to embodiment (20), a method for connecting an orthopedic tool to a handle adapter, Positioning the frame of the handle adapter so as to house the trunnion of the orthopedic tool inside, This includes translating the coupling assembly inside the first and second slots of the frame, along the first and second ramps of the first slot, With the coupling assembly positioned on the second ramp, the coupling assembly is engaged with the trunnion. This method includes [something].

Claims

1. A handle adapter for operating orthopedic tools, A frame having a proximal end portion and a distal end portion, wherein the distal end portion is A receptacle configured to house the trunnion of the orthopedic tool, A first slot communicating with the receptacle, the first slot being partially formed by a first ramp and a second ramp angled with respect to the first ramp, A second slot separated from the first slot, Frames, including A coupling assembly having a first support column housed in a first slot and a second support column housed in a second slot, wherein the coupling assembly translates through the first support column within the first slot and through the second support column within the second slot, A starting assembly comprising a spring coupled to the coupling assembly via the second support column, and a lever pivotably connected to the frame and coupled to the spring, wherein the lever is used to move the spring, thereby driving the first support column of the coupling assembly to engage with the trunnion in order to couple the handle adapter to the orthopedic tool, Includes, The first ramp is configured to pass the first support of the coupling assembly to a position adjacent to the notch of the trunnion, and the second ramp is configured to engage the first support with the trunnion inside the notch. Handle adapter.

2. The handle adapter according to claim 1, wherein the spring is subjected to a compressive load when the first support of the coupling assembly is engaged with the trunnion.

3. The handle adapter according to claim 1, further comprising a fixing mechanism for fixing the start assembly to the frame in a closed position, wherein the fixing mechanism includes a spring formed by the frame.

4. The handle adapter according to claim 1, wherein the second slot is at least partially formed by a rail, and the first ramp, the second ramp and the rail work together to guide the translation of the coupling assembly inside each slot of the first and second slots.

5. The handle adapter according to claim 4, wherein the frame including the first slot and the second slot is configured to release at least a portion of the disengagement force resulting from the engagement of the orthopedic tool with respect to the frame, thereby reducing the reaction force on the launch assembly as a result of the spring tension between the launch assembly and the orthopedic tool.

6. The handle adapter according to claim 1, wherein the frame forms the distal end of the second slot, and the engagement with the distal end restricts the progress of the coupling assembly along the first slot.

7. The handle adapter according to claim 1, wherein the frame is configured as a stationary cam, and the coupling assembly is configured as a follower guided by the stationary cam.

8. The handle adapter according to claim 1, wherein the coupling assembly includes a first support, a second support, and a linkage member extending between the first support and the second support, the first support being housed in a first slot, the second support being housed in a second slot, and the linkage member at least partially housing the distal end portion of the launch assembly.

9. The handle adapter according to claim 1, wherein the proximal end portion of the frame is configured to be coupled with a powered driver.

10. A handle adapter for operating orthopedic tools, A frame having a proximal end portion and a distal end portion, wherein the distal end portion is A receptacle configured to house the trunnion of the orthopedic tool, A first slot communicating with the receptacle, the first slot being partially formed by a first ramp and a second ramp angled with respect to the first ramp, A second slot, separated from the first slot and at least partially formed by the rail, Frames, including A coupling assembly having a first support column housed in the first slot and a second support column housed in the second slot, A starting assembly comprising a spring coupled to the coupling assembly via the second support column, and a lever pivotably connected to the frame and coupled to the spring, wherein the lever is used to move the spring, thereby driving the first support column of the coupling assembly to engage with the trunnion in order to couple the handle adapter to the orthopedic tool, Includes, The first ramp is configured to pass the first support of the coupling assembly to a position adjacent to the notch of the trunnion, and the second ramp is configured to engage the first support with the trunnion inside the notch. The frame, including the first and second slots, is configured to release at least a portion of the disengagement force resulting from the engagement of the orthopedic tool with respect to the frame, thereby reducing the reaction force on the launch assembly as a result of the spring tension between the launch assembly and the orthopedic tool. Handle adapter.

11. The handle adapter according to claim 10, wherein the proximal end portion of the frame is configured to be coupled with a powered driver.

12. The handle adapter according to claim 10, wherein the coupling assembly includes a first support, a second support, and a linkage member extending between the first support and the second support, the first support being housed in a first slot, the second support being housed in a second slot, and the linkage member at least partially housing the distal end portion of the launch assembly.

13. The handle adapter according to claim 10, wherein the second slot is configured to restrict the progress of the coupling assembly along the first slot.

14. A handle adapter for operating orthopedic tools, A frame having a proximal end portion and a distal end portion, wherein the distal end portion is A receptacle configured to house the trunnion of the orthopedic tool, A first slot communicating with the receptacle, the first slot being partially formed by a first ramp and a second ramp angled with respect to the first ramp, A second slot separated from the first slot, Frames, including A coupling assembly having a first support column housed in the first slot and a second support column housed in the second slot, A starting assembly comprising a spring coupled to the coupling assembly via the second support column, and a lever pivotably connected to the frame and coupled to the spring, wherein the lever is used to move the spring, thereby driving the coupling assembly to engage the first support column with the trunnion in order to couple the handle adapter to the orthopedic tool, Includes, The first ramp is configured to pass the first support of the coupling assembly to a position adjacent to the notch of the trunnion, and the second ramp is configured to engage the first support with the trunnion inside the notch. Handle adapter.

15. The handle adapter according to claim 14, wherein the second slot is at least partially formed by a rail, and the first ramp, the second ramp and the rail work together to guide the translation of the coupling assembly inside each of the slots of the first and second slots.

16. The handle adapter according to claim 14, wherein the first ramp is configured to pass the first support of the coupling assembly to a position adjacent to the notch of the trunnion, and the second ramp is configured to engage the first support with the trunnion inside the notch.

17. A method for connecting the orthopedic tool to the handle adapter described in any one of claims 1 to 16, Positioning the receptacle of the frame of the handle adapter so as to house the trunnion of the orthopedic tool inside, This includes translating the first and second supports of the connecting assembly along the first ramp of the first slot and the second ramp angled to the first ramp, within the first and second slots of the frame, With the first support of the coupling assembly positioned on the second ramp, the first support of the coupling assembly is engaged with the trunnion, A method that includes this.

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