Telescopic locking device for bone tissue cutting knife system and bone tissue cutting knife system

Abstract

The embodiment of the invention provides a telescopic locking device for a bone tissue cutting knife system. The telescopic locking device comprises a trigger structure used for moving and locking a steel wire rope; the cutter telescopic structure is connected to the trigger structure, the cutter telescopic structure comprises a sliding shaft and a center shaft installed in the sliding shaft, and the center shaft is provided with a center channel; the steel wire rope penetrates through a center channel of the center shaft and is fixed to the center shaft, and the steel wire rope can drive the grinding head to rotate and move. Wherein the trigger structure can move the steel wire rope, so that the grinding head is in a retracted state or an extended state, and when the grinding head is in the retracted state, the steel wire rope and the central shaft are fixed; when the grinding head is in the extending state, the center shaft rotates along with rotation of the steel wire rope, and the steel wire rope drives the grinding head to rotate for cutting operation. The embodiment of the invention further provides a bone tissue cutting knife system comprising the telescopic locking device.

Description

Technical Field

[0001] The present invention relates to the technical field of medical instruments, and in particular to a telescopic locking device for a bone tissue cutting knife system and the bone tissue cutting knife system. Background Art

[0002] The bone tissue cutting knife system is used to remove necrotic bone tissue within the femoral head. The location of the lesion is repeatedly observed using X-rays to prevent deviations in the cutting motion. The necrotic bone tissue is then removed using a grinding head held by a mobile phone to ensure the desired cavity is formed within the femoral head. In existing bone tissue cutting knife systems, the cutting tool, or grinding head, is constantly extended, which can hinder observation of the lesion location and hinder precise removal of necrotic bone tissue within the femoral head, resulting in increased surgical difficulty and poor efficiency. Summary of the Invention

[0003] In order to solve the technical problems existing in the prior art, an embodiment of the present invention provides a telescopic locking device for a bone tissue cutting knife system and a bone tissue cutting knife system. By setting a telescopic structure of the tool, the grinding head can be moved to an extended state when performing resection or to a retracted state when not performing resection.

[0004] An embodiment of the present invention provides a telescopic locking device for a bone tissue cutting knife system. The bone tissue cutting knife system includes a grinding head and a steel wire rope connected to the grinding head. The telescopic locking device includes: a trigger structure for moving and locking the steel wire rope; and a tool telescopic structure connected to the trigger structure, the tool telescopic structure including a sliding shaft and a central shaft mounted within the sliding shaft, the central shaft having a central channel; wherein the steel wire rope passes through the central channel of the central shaft and is fixed to the central shaft, and the steel wire rope can drive the grinding head to rotate and move; wherein the trigger structure can move the steel wire rope so that the grinding head is in a retracted state or an extended state. When the grinding head is in the retracted state, the steel wire rope and the central shaft are fixed; when the grinding head is in the extended state, the central shaft rotates with the rotation of the steel wire rope, and the steel wire rope drives the grinding head to rotate to perform a cutting operation.

[0005] According to some embodiments of the present invention, the tool telescopic structure further includes a sliding bearing for supporting the sliding shaft, wherein the sliding bearing is fixed to the housing of the bone tissue cutting knife system. This arrangement facilitates supporting and guiding the forward and backward movement of the sliding shaft.

[0006] According to some embodiments of the present invention, the outer diameter of the central shaft gradually increases in a direction away from the trigger structure. This arrangement is conducive to installing the central shaft into the sliding shaft.

[0007] According to some embodiments of the present invention, both ends of the central shaft are fixed to the sliding shaft via first bearings, forming a simply supported beam structure. With this arrangement, the first bearings constrain the vertical displacement of the central shaft but allow the central shaft to rotate freely, thereby allowing the steel wire rope fixed to the central shaft to rotate.

[0008] According to some embodiments of the present invention, the tool telescopic structure further includes a reset assembly for resetting the central shaft and the steel wire rope, which is advantageous for resetting the central shaft and the steel wire rope to a retracted state after the cutting is completed.

[0009] According to some embodiments of the present invention, the reset assembly includes a reset support block and a reset spring, wherein the reset support block is fixed to the housing of the bone tissue cutting knife system, and the reset spring surrounds the wire rope and is located between the reset support block and the sliding shaft.

[0010] According to some embodiments of the present invention, a synchronous rotating shaft for supporting the steel rope is provided in the reset support block.

[0011] According to some embodiments of the present invention, the synchronous rotation shaft is fixed to the reset support block via a second bearing.

[0012] According to some embodiments of the present invention, the trigger structure includes a trigger and a rotation axis, and the trigger can be rotated around the rotation axis to move and lock the wire rope.

[0013] According to some embodiments of the present invention, the trigger is connected to the tool telescopic structure via a connecting rod assembly, and the trigger and the connecting rod assembly form a connecting rod mechanism.

[0014] According to some embodiments of the present invention, the sliding shaft is provided with a transfer thrust plug for connecting to the connecting rod assembly.

[0015] According to some embodiments of the present invention, one end of the connecting rod assembly is connected to the tool telescopic structure via a first retaining spring, and the other end is connected to the trigger structure via a pin.

[0016] According to some embodiments of the present invention, the trigger is provided with a locking bayonet, and the trigger structure further includes a locking switch for locking the locking bayonet.

[0017] According to some embodiments of the present invention, a distance between the pin and the rotation axis is smaller than a distance between the rotation axis and the locking switch.

[0018] According to some embodiments of the present invention, when the grinding head is in the retracted state, the angle between the connecting rod assembly and the central axis is 130°-170°.

[0019] According to some embodiments of the present invention, when the grinding head is in an extended state, the connecting rod assembly and the central axis are in the same horizontal plane.

[0020] An embodiment of the present invention also provides a bone tissue cutting knife system, comprising: a grinding head; a steel wire rope for connecting the grinding head; and a telescopic locking device according to any of the aforementioned embodiments, for driving the steel wire rope to move so that the grinding head is in a retracted state or an extended state.

[0021] In the telescopic locking device for the bone tissue cutting knife system of the above embodiment, the steel wire rope can move so that the grinding head is in a retracted state or an extended state. When the grinding head is in the retracted state, the central shaft and the steel wire rope are fixed; when the grinding head is in the extended state, the central shaft rotates with the rotation of the steel wire rope, and the steel wire rope drives the grinding head to rotate to perform a cutting operation.

[0022] By setting up a tool telescopic structure, the grinding head can be moved to an extended state when performing resection or a retracted state when not performing resection, thereby avoiding the possibility that the grinding head may hinder the observation of the lesion location when not performing resection, which is conducive to the precise resection of necrotic bone tissue in the femoral head, greatly improving the efficiency of the operation and reducing the difficulty of the operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Other features and advantages of the present invention will be better understood through the following detailed description of the optional embodiments in conjunction with the accompanying drawings, in which the same reference numerals represent the same or similar components, wherein:

[0024] Figure 1 A cross-sectional schematic diagram of a telescopic locking device for a bone tissue cutting knife system according to an embodiment of the present invention is shown, wherein the grinding head is in a retracted state;

[0025] Figure 2 A cross-sectional schematic diagram of a telescopic locking device for a bone tissue cutting knife system according to an embodiment of the present invention is shown, wherein the grinding head is in an extended state;

[0026] Figure 3 Shown Figure 1 A front side schematic diagram of the tool telescopic structure of the telescopic locking device of the embodiment shown in FIG;

[0027] Figure 4 Shown Figure 1 A schematic diagram of the rear side of the tool telescopic structure of the telescopic locking device of the embodiment shown in FIG;

[0028] Figure 5A schematic structural diagram of a telescopic locking device for a bone tissue cutting knife system according to an embodiment of the present invention is shown, wherein the grinding head is in a retracted state; and

[0029] Figure 6 A schematic structural diagram of a telescopic locking device for a bone tissue cutting knife system according to an embodiment of the present invention is shown, wherein the grinding head is in an extended state. DETAILED DESCRIPTION

[0030] The following describes the implementation and use of the embodiments in detail. However, it should be understood that the specific embodiments discussed are merely illustrative of specific ways to implement and use the present invention and are not intended to limit the scope of the present invention. When describing the structural positions of components, such as up, down, top, and bottom, directional references are not absolute but relative. These directional references are appropriate when the components are arranged as shown in the figures, but they will change accordingly if the positions of the components in the figures are changed.

[0031] In the existing bone tissue cutting knife system, the tool, i.e. the grinding head, is always in an extended state, which may hinder the observation of the lesion location and is not conducive to the precise removal of necrotic bone tissue in the femoral head, resulting in high surgical difficulty and poor surgical efficiency.

[0032] To this end, an embodiment of the present invention provides a telescopic locking device for a bone tissue cutting knife system. The bone tissue cutting knife system includes a grinding head and a steel wire rope connected to the grinding head, and the telescopic locking device includes: a trigger structure for moving and locking the steel wire rope; and a tool telescopic structure connected to the trigger structure, the tool telescopic structure including a sliding shaft and a central shaft installed in the sliding shaft, the central shaft having a central channel; wherein the steel wire rope passes through the central channel of the central shaft and is fixed to the central shaft, and the steel wire rope can drive the grinding head to rotate and move; wherein the trigger structure can move the steel wire rope so that the grinding head is in a retracted state or an extended state, when the grinding head is in the retracted state, the steel wire rope and the central shaft are fixed; when the grinding head is in the extended state, the central shaft rotates with the rotation of the steel wire rope, and the steel wire rope drives the grinding head to rotate to perform a cutting operation.

[0033] An embodiment of the present invention further provides a bone tissue cutting knife system comprising a grinding head and a steel wire rope connected to the grinding head, and a telescopic locking device. The telescopic locking device drives the steel wire rope to move the grinding head to a retracted state or an extended state. In the extended state, the steel wire rope drives the grinding head to rotate, thereby removing necrotic bone tissue and ensuring the desired cavity is formed in the femoral head.

[0034] The specific structure and function of the telescopic locking device for a bone tissue cutting knife system according to an embodiment of the present invention will be described in detail below with reference to the accompanying drawings.

[0035] Figure 1 A cross-sectional schematic diagram of a telescopic locking device for a bone tissue cutting knife system according to an embodiment of the present invention is shown, wherein the grinding head is in a retracted state; Figure 2 A cross-sectional schematic diagram of a telescopic locking device for a bone tissue cutting knife system according to an embodiment of the present invention is shown, wherein the grinding head is in an extended state; Figure 3 Shown Figure 1 A front side schematic diagram of the tool telescopic structure of the telescopic locking device of the embodiment shown in FIG; Figure 4 Shown Figure 1 Schematic diagram of the rear side of the tool telescopic structure of the telescopic locking device of the embodiment shown in .

[0036] like Figure 1 and Figure 2 As shown in FIG, the telescopic locking device 60 includes a trigger structure 61 and a tool telescopic structure 62, wherein the tool telescopic structure 62 is connected to the trigger structure 61. The trigger structure 61 can rotate to move and lock the wire rope 21. The tool telescopic structure 62 includes a sliding shaft 621 and a central shaft 622 installed in the sliding shaft 621. The central shaft 622 and the sliding shaft 621 are coaxially arranged. The central shaft 622 has a central channel 6221, which extends along the axis of the central shaft 622 and passes through the entire central shaft 622. The central shaft 622 can rotate freely within the sliding shaft 621.

[0037] The wire rope 21 passes through the central channel 6221 of the central shaft 622 and is secured to the central shaft 622. One end of the wire rope passes through the tool telescoping mechanism 62 and is connected to the grinding head 10. The other end passes through the trigger mechanism 61 and is secured to the housing of the bone tissue cutting knife system and connected to an external power source. The external power source provides power to the wire rope 21. The wire rope 21 can rotate and move, driving the grinding head 10 to rotate and move.

[0038] The wire rope 21 can move so that the grinding head 10 is in a retracted state or an extended state. When the grinding head 10 is in the retracted state, the wire rope 21 and the center shaft 622 are fixed; when the grinding head 10 is in the extended state, the center shaft 622 rotates with the rotation of the wire rope 21. The wire rope 21 can rotate to drive the grinding head 10 to rotate to perform cutting operations.

[0039] By setting up the tool telescopic structure 62, the grinding head 10 can be moved to an extended state when performing resection or a retracted state when not performing resection, thereby avoiding the grinding head 10 from obstructing the observation of the lesion location when not performing resection, which is beneficial for the precise resection of necrotic bone tissue in the femoral head, greatly improving the surgical efficiency and reducing the difficulty of the surgery.

[0040] In some embodiments, the tool telescopic structure 62 further includes a sliding bearing 623 for supporting the sliding shaft 621. The sliding bearing 623 is fixed to the housing of the bone tissue cutting knife system. The provision of the sliding bearing 623 facilitates support and guidance of the forward and backward movement of the sliding shaft 621.

[0041] like Figure 3 and Figure 4 As shown in , in some embodiments, the outer diameter of the central shaft 622 gradually increases in the direction away from the trigger structure 61 , that is, gradually increases in the direction toward the grinding head 10 , which is conducive to installing the central shaft 622 into the sliding shaft 621 .

[0042] In some embodiments, both ends of the central shaft 622 are secured to the sliding shaft 621 via first bearings 6222. The central shaft 622 and the first bearings 6222 at both ends form a simply supported beam structure. By attaching both ends of the central shaft 622 to the first bearings 6222, the first bearings 6222 constrain the vertical displacement of the central shaft 622 while allowing the central shaft 622 to rotate freely, thereby allowing the steel wire rope 21 secured to the central shaft 622 to rotate. The central shaft 622 can also be secured to the sliding shaft 621 via a second retaining spring 6223, and the steel wire rope 21 can be secured to the central shaft 622 via a set screw 6224.

[0043] In some embodiments, the tool telescopic structure 62 further includes a reset assembly 624 for resetting the central shaft 622 and the steel wire rope 21, which is beneficial for resetting the central shaft 622 and the steel wire rope 21 to a retracted state after the resection is completed.

[0044] In some embodiments, the reset assembly 624 includes a reset support block 6241 and a reset spring 6242. The reset support block 624 is fixed to the housing of the bone tissue cutting knife system, and the reset spring 6242 surrounds the wire rope 21 and is located between the reset support block 6241 and the sliding shaft 621.

[0045] In some embodiments, a synchronous rotation shaft 6243 for supporting the wire rope 21 is provided within the reset support block 6241. The synchronous rotation shaft 6243 is fixed to the reset support block 6241 via a second bearing 6244. When the wire rope 21 and the grinding head 10 rotate, the synchronous rotation shaft 6243 rotates along with the wire rope 21, while the reset support block 6241 remains stationary.

[0046] In some embodiments, the trigger structure 61 includes a trigger 611 and a rotation shaft 612 , and the trigger 611 can rotate around the rotation shaft 612 to move the wire rope 21 .

[0047] In some embodiments, the trigger 611 is connected to the tool telescopic structure 62 via a connecting rod assembly 625 , and the trigger 611 and the connecting rod assembly 625 form a connecting rod mechanism. The connecting rod assembly 625 includes two connecting rods 6251 , one located on either side of the trigger 611 .

[0048] In some embodiments, the sliding shaft 621 is provided with a transfer thrust plug 6211 for connecting the connecting rod assembly 625. The thrust of the connecting rod assembly 625 is transmitted to the sliding shaft 621 through the transfer thrust plug 6211.

[0049] In some embodiments, one end of the connecting rod assembly 625 is connected to the tool telescopic structure 62 via a first retaining spring 6252, and the other end is connected to the trigger structure 61 via a pin 6253. Specifically, one end of each connecting rod 6251 is connected to the transfer thrust plug 6211 of the sliding shaft 621 of the tool telescopic structure 62 via a first retaining spring 6252, and the other end is connected to the trigger 611 of the trigger structure 61 via a pin 6253.

[0050] In some embodiments, the trigger 611 is provided with a locking bayonet 6111, and the trigger structure 61 further includes a locking switch 613 for locking the locking bayonet 6111. The trigger 611 is locked by the locking switch 613, thereby locking the steel wire rope 21.

[0051] In some embodiments, the distance between the pin 6253 and the rotating shaft 612 is smaller than the distance between the rotating shaft 612 and the locking switch 613. This arrangement facilitates turning the trigger 611 with less force, moving the locking tab 6111 of the trigger 611 to the locking switch 613, and locking the locking tab 6111 through the locking switch 613, thereby locking the steel wire rope 21 so that it cannot move, and keeping the grinding head 10 in the extended state.

[0052] Figure 5 A schematic structural diagram of a telescopic locking device for a bone tissue cutting knife system according to an embodiment of the present invention is shown, wherein the grinding head is in a retracted state; Figure 6 A schematic structural diagram of a telescopic locking device for a bone tissue cutting knife system according to an embodiment of the present invention is shown, wherein the grinding head is in an extended state.

[0053] like Figure 5 and Figure 6As shown in , in some embodiments, when the grinding head 10 is in the retracted state, the angle α between the connecting rod assembly 625 and the central axis 622 is 130°-170°. At this point, the grinding head 10 contacts the protective sleeve 50 outside the wire rope 21 or is retracted into the protective sleeve 50, and the grinding head 10 cannot rotate freely. More specifically, the angle α between the centerline of the connecting rod 6251 of the connecting rod assembly 625 and the axis of the central axis 622 is 130°-170°. For example, the angle α between the centerline of the connecting rod 6251 of the connecting rod assembly 625 and the axis of the central axis 622 is 150°.

[0054] In some embodiments, when the grinding head 10 is in the extended position, the connecting rod assembly 625 and the central shaft 622 are in the same horizontal plane. At this point, the grinding head 10 is a distance away from the protective sleeve 50, and the grinding head 10 can rotate freely. More specifically, the centerline of the connecting rod 6251 of the connecting rod assembly 625 and the axis of the central shaft 622 are in the same horizontal plane. In other words, the angle between the centerline of the connecting rod 6251 of the connecting rod assembly 625 and the axis of the central shaft 622 is 180°.

[0055] Recombination Figure 5 and Figure 6 As shown, when the trigger 611 of the trigger structure 61 is pressed, the connecting rod 6251 of the connecting rod assembly 625 is driven to rotate, and the connecting rod 6251 pushes the transfer thrust cover 6211, the sliding shaft 621, and the central shaft 622 to move, thereby driving the wire rope 21 to move along the length direction of the central shaft 622, and the reset spring 6242 of the reset assembly 624 begins to compress and store energy. When the trigger 611 is pressed down to the maximum working position, the locking switch 613 locks the locking bayonet 6111 of the trigger 611. At this time, the center line of the connecting rod 6251 and the axis of the central shaft 622 are in the same horizontal plane, and the grinding head 10 extends out of the protective sleeve 50 and is at the maximum extension length, so that corresponding cutting work can be performed.

[0056] When the trigger 611 is pressed again, the locking switch 613 exits the locked state and releases the locking latch 6111 of the trigger 611. Under the action of the mechanical energy released by the compression of the return spring 6242, the sliding shaft 621 drives the central shaft 622, the wire rope 21, the connecting thrust plug 6211 and the connecting rod 6251 to return to the initial state. Therefore, the above actions complete the telescopic locking and release of the grinding head 10 once.

[0057] The present invention also provides a bone tissue cutting knife system, comprising a grinding head 10, a wire rope 21, and a telescopic locking device 60. The wire rope 21 is connected to the grinding head 10, and the telescopic locking device 60 drives the wire rope 21 to move, so that the grinding head 10 is in a retracted state or an extended state.

[0058] In the telescopic locking device for the bone tissue cutting knife system of the above embodiment, the steel wire rope can move so that the grinding head is in a retracted state or an extended state. When the grinding head is in the retracted state, the central shaft and the steel wire rope are fixed; when the grinding head is in the extended state, the central shaft rotates with the rotation of the steel wire rope, and the steel wire rope drives the grinding head to rotate to perform a cutting operation.

[0059] By setting up a tool telescopic structure, the grinding head can be moved to an extended state when performing resection or a retracted state when not performing resection, thereby avoiding the possibility that the grinding head may hinder the observation of the lesion location when not performing resection, which is conducive to the precise resection of necrotic bone tissue in the femoral head, greatly improving the efficiency of the operation and reducing the difficulty of the operation.

[0060] The technical content and technical features of the present invention have been disclosed above. However, it is understood that, based on the creative ideas of the present invention, those skilled in the art may make various changes and improvements to the above-disclosed concepts, all of which fall within the scope of protection of the present invention. The description of the above embodiments is illustrative and not restrictive. The scope of protection of the present invention is determined by the claims.

Claims

1. A telescopic locking device for a bone tissue cutting knife system, characterized in that: The bone tissue cutting knife system includes a grinding head and a steel wire rope connecting the grinding head, and the telescopic locking device includes: a trigger structure for moving and locking the wire rope; and a tool telescopic structure connected to the trigger structure, the tool telescopic structure comprising a sliding shaft and a central shaft mounted within the sliding shaft, the central shaft having a central channel; Wherein, the steel wire rope passes through the central channel of the central shaft and is fixed to the central shaft, and the steel wire rope can drive the grinding head to rotate and move; Among them, the trigger structure can move the wire rope so that the grinding head is in a retracted state or an extended state. When the grinding head is in the retracted state, the wire rope and the center shaft are fixed; when the grinding head is in the extended state, the center shaft rotates with the rotation of the wire rope, and the wire rope drives the grinding head to rotate to perform cutting operations.

2. The telescopic locking device for a bone tissue cutting knife system according to claim 1, characterized in that: The tool telescopic structure further includes a sliding bearing for supporting the sliding shaft, wherein the sliding bearing is fixed to a housing of the bone tissue cutting knife system.

3. The telescopic locking device for a bone tissue cutting knife system according to claim 1, characterized in that: The outer diameter of the central shaft gradually increases in a direction away from the trigger structure.

4. The telescopic locking device for a bone tissue cutting knife system according to claim 1, characterized in that: Both ends of the central shaft are fixed to the sliding shaft through first bearings to form a simply supported beam structure.

5. The telescopic locking device for a bone tissue cutting knife system according to any one of claims 1 to 4, characterized in that: The tool telescopic structure further includes a reset component for resetting the central shaft and the steel wire rope.

6. The telescopic locking device for a bone tissue cutting knife system according to claim 5, characterized in that: The reset assembly includes a reset support block and a reset spring. The reset support block is fixed to the housing of the bone tissue cutting knife system. The reset spring surrounds the steel wire rope and is located between the reset support block and the sliding shaft.

7. The telescopic locking device for a bone tissue cutting knife system according to claim 6, characterized in that: A synchronous rotating shaft for supporting the steel rope is provided in the reset support block.

8. The telescopic locking device for a bone tissue cutting knife system according to claim 7, characterized in that: The synchronous rotation shaft is fixed to the reset support block via a second bearing.

9. The telescopic locking device for a bone tissue cutting knife system according to any one of claims 1 to 4, characterized in that: The trigger structure includes a trigger and a rotation shaft, and the trigger can be rotated around the rotation shaft to move and lock the wire rope.

10. The telescopic locking device for a bone tissue cutting knife system according to claim 9, characterized in that: The trigger is connected to the tool telescopic structure through a connecting rod assembly, and the trigger and the connecting rod assembly form a connecting rod mechanism.

11. The telescopic locking device for a bone tissue cutting knife system according to claim 10, characterized in that: The sliding shaft is provided with a transfer thrust plug cover for connecting the connecting rod assembly.

12. The telescopic locking device for a bone tissue cutting knife system according to claim 10, characterized in that: One end of the connecting rod assembly is connected to the tool telescopic structure through a first retaining spring, and the other end is connected to the trigger structure through a pin.

13. The telescopic locking device for a bone tissue cutting knife system according to claim 12, characterized in that: The trigger is provided with a locking bayonet, and the trigger structure further comprises a locking switch for locking the locking bayonet.

14. The telescopic locking device for a bone tissue cutting knife system according to claim 13, characterized in that: A distance between the pin and the rotation axis is smaller than a distance between the rotation axis and the locking switch.

15. The telescopic locking device for a bone tissue cutting knife system according to claim 10, characterized in that: When the grinding head is in a retracted state, the angle between the connecting rod assembly and the central axis is 130°-170°.

16. The telescopic locking device for a bone tissue cutting knife system according to claim 10, characterized in that: When the grinding head is in an extended state, the connecting rod assembly and the central axis are in the same horizontal plane.

17. A bone tissue cutting knife system, characterized in that: include: Grinding head; A steel wire rope, used for connecting the grinding head; as well as The telescopic locking device for a bone tissue cutting knife system according to any one of claims 1 to 16 is used to drive the steel wire rope to move so that the grinding head is in a retracted state or an extended state.

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