An oval bone punch

Abstract

The application provides an elliptical bone extractor, and belongs to the technical field of medical equipment. The elliptical bone extractor comprises a handle and an outer rod. The handle is connected with a mounting rod. The side wall of the handle is fixedly connected with a knocking end. One end of the outer rod is provided with a bone extraction end. One end of the handle is provided with a knob. One end of the knob is provided with a screw rod and a sliding rod. The elliptical bone extractor further comprises a pushing assembly and a limiting assembly. The pushing assembly is used for sending diseased bone out of the bone extraction end. The limiting assembly is used for adjusting the position of the pushing assembly. The elliptical bone extractor has the beneficial effects that: the elliptical bone extractor is provided with multi-specification detachable bone extraction ends, which are suitable for various diseased regions. The bone extraction precision is improved by matching the observation port and the scale line, and the damage to healthy tissues is reduced. The limiting assembly is designed in a threaded connection mode, so that the operation and replacement of the bone extraction end are more convenient. The separation rod of the pushing assembly is matched with an electromagnetic positioning device and a return spring, so that the adhered bone block is automatically stripped, the falling problem is solved, the pushing plate groove is matched with the bone block, the stress is uniformly distributed to prevent the bone block from being broken, and the manual operation is reduced.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, and more specifically, to an elliptical bone harvester. Background Technology

[0002] As living standards improve, people are placing higher demands on health and paying more attention to physical exercise. For young athletes, the high volume and intensity of exercise lead to long-term weight-bearing and repeated friction on the knee joints, causing accelerated wear and tear on the articular cartilage, resulting in cartilage lesions and pain. The most common surgical treatment for cartilage lesions is cartilage transplantation, which involves removing the diseased cartilage using a bone harvester and then replacing it with healthy cartilage or other bone grafts to repair the lesions. Most existing bone harvesting devices are circular. Because the shape and size of diseased cartilage are not fixed, the circular harvesting head is too restrictive. For example, if the lesion area is long and thin, using a circular harvesting head to match the length of the lesion area would result in the removal of a large area of ​​normal bone, causing damage to the bone. Therefore, the circular harvesting head is too restrictive. Furthermore, the diseased bone tissue may contain necrotic or softened parts, exhibiting a certain degree of viscosity. Simultaneously, the surgical wound contains blood and tissue fluid. The surface tension of these fluids causes the harvested bone tissue to "adhere" to the smooth metal pusher surface like glue. When both the pusher and the bone tissue surface are very smooth and moist, the squeezed-out liquid may create a slight negative pressure, producing an adsorption effect and making it difficult for the bone fragment to detach on its own. How to invent an elliptical bone harvesting device to solve these problems has become an urgent issue for those skilled in the art. Summary of the Invention

[0003] To overcome the above shortcomings, the present invention provides an elliptical bone harvester, which aims to solve the problems of the limited head end of the circular bone harvester, the possibility that the diseased bone tissue may contain necrotic and softened parts with a certain degree of viscosity, and the possibility that when the push rod and the surface of the bone tissue are very flat and wet, the liquid squeezed out in the middle may form a weak negative pressure, producing an adsorption effect, making it difficult for the bone fragment to fall off on its own.

[0004] This invention is implemented as follows: This invention provides an elliptical bone harvesting device, comprising a handle and an outer rod. The handle is connected to a mounting rod, and a striking end is fixedly connected to the side wall of the handle. One end of the outer rod is provided with a bone harvesting end, and one end of the handle is provided with a knob. One end of the knob is provided with a screw and a sliding rod. The device also includes: A pushing component, located inside the outer rod, is used to deliver diseased bone from inside the bone harvesting end; A limiting component is fixedly connected to the outer rod, and the limiting component is used to adjust the position of the fixed pushing component.

[0005] Preferably, one end of the knob is fixedly connected to the screw, and the end of the screw away from the knob is fixedly connected to the slide rod. The outer diameter of the slide rod is smaller than the outer diameter of the screw, and a hemispherical groove is provided at the end of the slide rod away from the screw.

[0006] Preferably, the grip is T-shaped and connected to a mounting rod. The inner wall of the grip fits against the outer wall of one end of the outer rod. One end of the outer rod has a slot that mates with the mounting rod. The grip and the outer rod are fixedly connected by the slot and the mounting rod.

[0007] Preferably, the inner wall of the outer rod is provided with a sliding hole, and one end of the inner wall of the sliding hole is provided with a threaded groove that mates with the screw rod, and the inner wall of the sliding hole is slidably connected to the sliding rod.

[0008] Preferably, the limiting component includes an extension block and a button. The extension block is fixedly connected to the outer wall of the outer rod. The side wall of the extension block has a placement groove, the inner wall of the placement groove has a slot, and the inner wall of the placement groove has a hole.

[0009] Preferably, one end of the button has a second slot, and the inside of the second slot has a telescopic spring. The two ends of the telescopic spring abut against the inner walls of the second slot and the first slot, respectively. The button is located inside the placement slot, and a pin is detachably connected to the side wall of the button. The pin is rotatably connected to the inner wall of the placement slot.

[0010] Preferably, one end of the bone-harvesting end is threadedly connected to the end of the outer rod away from the handle, the other end of the bone-harvesting end is elliptical, the outer wall of the bone-harvesting end is provided with scale lines, and the outer wall of the bone-harvesting end is provided with an observation port.

[0011] Preferably, the pushing component includes a push rod, which is slidably connected to the inner wall of the sliding hole. The outer wall of the push rod has several inclined grooves that cooperate with the button. One end of the push rod is fixedly connected to a push ball. The outer wall of the push ball has a limiting groove. The limiting groove is provided with a buffer spring and a contact switch. The two ends of the buffer spring are fixedly connected to the inner wall of the limiting groove and the side wall of the contact switch, respectively. The contact switch is slidably connected to the inner wall of the limiting groove.

[0012] Preferably, a push plate is fixedly connected to the end of the push rod away from the push ball. A stepped groove is formed inside the push rod. A groove is formed on the side of the push plate away from the push rod. A cavity is formed inside the push plate. An extension groove is formed on the inner wall of the cavity. A pressure sensor is fixedly connected to the inner wall of the extension groove. An electromagnetic ring is provided at the opening of the extension groove. A return spring and a push rod are provided inside the stepped groove. The push rod is slidably connected to the inner wall of the stepped groove. One end of the push rod penetrates the inner wall of the cavity. The return spring is sleeved on the outside of the push rod. The two ends of the return spring are fixedly connected to the inner wall of the stepped groove and the side wall of the push rod, respectively.

[0013] Preferably, a movable plate is slidably connected inside the cavity, and a plurality of arrayed separating rods are fixedly connected to one side of the movable plate. One end of the separating rod penetrates the side wall of the groove, and a pressure rod is fixedly connected to the other side of the movable plate. A magnetic block is sleeved on the outer wall of the pressure rod, and the inner diameter of the pressure rod is smaller than the inner diameter of the extension groove. The side wall of the movable plate is fixedly connected to one end of the top rod.

[0014] The beneficial effects of this invention are: This invention employs a multi-specification detachable elliptical bone harvesting tip to adapt to cartilage lesion areas of different shapes and sizes, especially for irregular lesions such as long and thin strips. It avoids the problem of excessive removal of normal bone due to the shape limitations of traditional round bone harvesters. Furthermore, the matching design of the bone harvesting tip with the push rod and push plate, combined with the observation port and scale lines, ensures that the bone harvesting is accurately aligned with the lesion site, further reducing the risk of damage to healthy tissue. In addition, the limiting component realizes quick locking and unlocking of the push rod through a button, telescopic spring and inclined groove engagement structure. With the transmission design of the knob and screw, the operation is simple and easy to learn. The bone harvesting tip adopts a threaded connection, which can be quickly changed to different specifications without complicated disassembly.

[0015] 2. This invention uses a pusher component with a built-in array of separating rods, combined with an electromagnetic positioning and reset spring linkage mechanism, to automatically and quickly peel off adhered diseased bone fragments, completely solving the problem of bone fragments being difficult to detach due to blood viscosity and negative pressure effect. The pusher plate groove fits and conforms to the surface of the bone fragment, ensuring uniform force during pushing and preventing bone fragments from breaking. At the same time, the separating rods apply force synchronously, enabling the bone fragments to pop out smoothly and reducing manual peeling operations. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the overall front structure of an elliptical bone harvester provided in an embodiment of the present invention; Figure 2 This is a schematic diagram of the overall rear structure of an elliptical bone harvester provided in an embodiment of the present invention; Figure 3 This is an exploded structural diagram of an elliptical bone harvester provided in an embodiment of the present invention; Figure 4 This is a schematic diagram of the overall half-section structure of an elliptical bone harvester provided by an embodiment of the present invention; Figure 5 This is a schematic diagram of the outer rod structure of an elliptical bone harvester provided by an embodiment of the present invention; Figure 6 This is a schematic diagram of the limiting component structure of an elliptical bone harvester provided in an embodiment of the present invention; Figure 7 This is a schematic diagram of the bone harvesting end structure of an elliptical bone harvester provided in an embodiment of the present invention; Figure 8 This is a schematic diagram of the pushing component structure of an elliptical bone harvester provided in an embodiment of the present invention; Figure 9 This is a schematic diagram of the internal structure of the push plate of an elliptical bone harvester provided in an embodiment of the present invention; Figure 10 This is a schematic diagram of the internal structure of the push ball of an elliptical bone harvester provided in an embodiment of the present invention; Figure 11 This is a schematic diagram of the knob structure of an elliptical bone harvester provided in an embodiment of the present invention.

[0018] In the diagram: 1. Knob; 2. Screw; 21. Slide rod; 22. Hemispherical groove; 3. Striking end; 4. Handle; 5. Outer rod; 51. Threaded slot; 52. Slot; 53. Sliding hole; 6. Limiting component; 61. Extension block; 62. Button; 63. Placement slot; 64. Locking hole; 65. Locking slot one; 66. Telescopic spring; 67. Locking slot two; 68. Pin; 7. Bone harvesting end; 71. Scale line; 72. Observation port; 8. Mounting rod 9. Pushing assembly; 91. Push rod; 9101. Stepped groove; 92. Push plate; 921. Groove; 93. Separating rod; 94. Inclined groove; 95. Push ball; 951. Limiting slide; 96. Movable plate; 97. Cavity; 971. Extension groove; 98. Pressure sensor; 99. Return spring; 910. Top rod; 911. Electromagnetic ring; 912. Pressure rod; 913. Magnetic block; 10. Buffer spring; 11. Contact switch. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] Example 1 Reference Figures 1-11 An elliptical bone harvester includes a handle 4 and an outer rod 5. The handle 4 is connected to a mounting rod 8, and a striking end 3 is fixedly connected to the side wall of the handle 4. One end of the outer rod 5 has a bone harvesting end 7, and one end of the handle 4 has a knob 1. One end of the knob 1 has a screw 2 and a sliding rod 21. The device also includes: Pushing component 9, located inside the outer rod 5, is used to deliver the diseased bone from inside the bone harvesting end 7; Limiting component 6 is fixedly connected to the outer rod 5 and is used to adjust the position of the fixed pushing component 9.

[0021] Furthermore; one end of the knob 1 is fixedly connected to the screw 2, and the end of the screw 2 away from the knob 1 is fixedly connected to the slide rod 21. The outer diameter of the slide rod 21 is smaller than the outer diameter of the screw 2. A hemispherical groove 22 is provided at the end of the slide rod 21 away from the screw 2. The handle 4 is T-shaped and is connected to the mounting rod 8. The inner wall of the handle 4 fits against the outer wall of one end of the outer rod 5. A slot 52 that mates with the mounting rod 8 is provided at one end of the outer rod 5. The handle 4 and the outer rod 5 are fixedly connected to the mounting rod 8 through the slot 52. A sliding hole 53 is provided on the inner wall of the outer rod 5. A threaded groove 51 that mates with the screw 2 is provided on the inner wall of one end of the sliding hole 53. The inner wall of the sliding hole 53 is slidably connected to the slide rod 21.

[0022] Power transmission of knob 1: Knob 1 adopts a cylindrical structure with several anti-slip grooves on its surface. This increases the friction between the hand and knob 1, preventing slippage due to sweaty hands or nervous operation during surgery. It also provides a fulcrum for the fingers, making it easier for doctors to accurately control the rotation force. Knob 1 is a power input component, with one end fixedly connected to screw 2. Rotating knob 1 will synchronously drive screw 2 to rotate, converting the doctor's manual rotation force into the axial thrust of screw 2.

[0023] The screw 2 and slide bar 21 work together: the end of the screw 2 away from the knob 1 is fixed to the slide bar 21 as one piece, and the two form a continuous transmission structure. The hemispherical groove 22 opened at one end of the slide bar 21 is precisely matched with the push ball 95 at the end of the push rod 91. The hemispherical design can reduce the frictional resistance of the contact area, while ensuring uniform force and avoiding the push rod 91 from deviating or getting stuck during the push. When the screw 2 rotates inside the main body, it generates axial displacement through thread engagement, which in turn drives the slide bar 21 to move synchronously. The slide bar 21 smoothly transmits the axial thrust to the push rod 91 through the contact between the hemispherical groove 22 and the push ball 95, so as to realize the slow and uniform push of the push rod 91.

[0024] The grip 4 is structurally supported by a fixed connection between the grip 4 and the outer rod 5. The grip 4 adopts a T-shaped design, which conforms to the ergonomic principle. The horizontal grip provides a stable grip fulcrum for the doctor, while the vertical connection is firmly connected to the outer rod 5. This not only facilitates the doctor's force application when tapping to remove bone, but also reduces hand fatigue and improves the comfort of long-term surgical operations. The outer rod 5, as the core support component, has a threaded slot 51 inside that precisely matches the screw 2. The screw 2 is rotated and reversed through thread engagement, ensuring the stability and accuracy of power transmission. In addition, the outer rod 5 can be equipped with a battery for powering the device.

[0025] Reference Figure 3 , Figure 4 , Figure 5 , Figure 6 and Figure 11 Furthermore, the limiting component 6 includes an extension block 61 and a button 62. The extension block 61 is fixedly connected to the outer wall of the outer rod 5. The side wall of the extension block 61 is provided with a placement groove 63. The inner wall of the placement groove 63 is provided with a first slot 65 and a second slot hole 64. One end of the button 62 is provided with a second slot 67. The inside of the second slot 67 is provided with a telescopic spring 66. The two ends of the telescopic spring 66 abut against the inner walls of the second slot 67 and the first slot 65, respectively. The button 62 is located inside the placement groove 63. The side wall of the button 62 is detachably connected with a pin 68. The pin 68 is rotatably connected to the inner wall of the placement groove 63.

[0026] Locking and unlocking of limiting component 6: Limiting component 6 consists of button 62, telescopic spring 66, and pin 68, and is fixed to the extension block 61 on the outer wall of outer rod 5. Pin 68 passes through button 62 and is rotatably connected to the placement groove 63 of extension block 61, allowing button 62 to swing flexibly around pin 68. The two ends of telescopic spring 66 abut against slot 2 67 and slot 1 65 respectively, providing continuous reset force for button 62. When push rod 91 is inserted into outer rod 5 through bone harvesting end 7, it is necessary to ensure that the inclined groove 94 on the outer wall of push rod 91 is aligned with the direction of button 62. At this time, button 62 is pushed by telescopic spring 66. Under the action of force, the push rod 91 is engaged in the inclined groove 94. This engagement structure can firmly restrict the push rod 91 from sliding outward, providing stable structural support for subsequent bone removal by tapping, and avoiding accidental displacement of the push rod 91 that would affect the accuracy of bone removal. When it is necessary to adjust the position of the push rod 91 or push out the bone block, the doctor can press the button 62 to compress the telescopic spring 66, causing the button 62 to disengage from the inclined groove 94 on the push rod 91 and release the locking state. At this time, rotating the knob 1 can drive the screw 2 and the slide bar 21 to move axially, thereby pushing the push rod 91 to move, meeting the operational needs of pre-positioning before bone removal and pushing out the bone block after bone removal.

[0027] The overall surgical procedure is as follows: Based on the shape and size of the patient's cartilage lesion, the doctor selects the corresponding oval bone harvesting end 7 and screws it into the end of the outer rod 5 using a threaded connection to ensure a secure connection and prevent loosening during the operation. The doctor then selects the push rod 91 that matches the bone harvesting end 7 and inserts it into the sliding hole 53 of the outer rod 5 along the bone harvesting end 7, ensuring that the inclined groove 94 is aligned with the button 62 on the limiting component 6. The doctor presses the button 62 to release the lock, rotates the knob 1 to push the push rod 91 forward until the push plate 92 at the front end of the push rod 91 is 1-2 mm away from the port of the bone harvesting end 7. The doctor then removes the knob 1 and releases the button 62, and the button 62 re-engages into the inclined groove 94, thus achieving the pre-positioning and locking of the push rod 91. The doctor holds the T-shaped handle 4 and precisely aligns the bone harvesting tip 7 with the lesion. The doctor uses a bone hammer to strike the striking end 3 on the side wall of the handle 4. The impact force drives the oval bone harvesting tip 7 into the bone tissue. The scale line 71 on the outer wall of the bone harvesting tip 7 can help determine the depth of bone harvesting. The observation port 72 can observe the internal situation in real time. After the bone harvesting tip 7 reaches the preset depth, the bone harvester is pulled out smoothly. The diseased bone fragment will be retained inside due to the wrapping effect of the bone harvesting tip 7 and will be taken out with it. After pressing button 62 to release the lock of push rod 91, rotate knob 1 again. Through the transmission of screw 2 and slide rod 21, push rod 91 is pushed forward. Push plate 92 at the front end of push rod 91 drives separation rod 93 to smoothly push out the retained diseased bone fragment. If the diseased area is large, the above positioning, bone harvesting and bone pushing operations can be repeated until the diseased tissue is completely removed. Finally, intact cartilage or bone filler is filled into the diseased area to complete the repair surgery. In the whole process, the elliptical bone harvesting end 7 is adapted to various diseased shapes to avoid damage to normal bone, while the locking mechanism of limiting component 6 ensures safe and stable operation. The detachable connection design makes it easy to replace bone harvesting end 7, greatly shortens the operation time, and solves the limitations of traditional round bone harvesting instruments.

[0028] Furthermore, one end of the bone-removing end 7 is threadedly connected to the end of the outer rod 5 away from the handle 4, the other end of the bone-removing end 7 is elliptical, the outer wall of the bone-removing end 7 is provided with scale lines 71, and the outer wall of the bone-removing end 7 is provided with an observation port 72.

[0029] It should be noted that the outer rod 5 has a threaded structure at the end away from the handle 4. The bone harvesting end 7 is detachably connected to the outer rod 5 through this thread. The bone harvesting end 7 can be installed and removed by rotating it. The operation is convenient and the connection is firm, avoiding accidental loosening of the bone harvesting end 7 during surgery. The bone harvesting end 7, push rod 91 and push plate 92 form a matching relationship. When push rod 91 moves forward under the push of slide rod 21, it can accurately extend into the bone harvesting end 7 and smoothly push out the retained diseased bone fragment, realizing a continuous operation of "bone harvesting-bone removal". The threaded connection design makes it easy to quickly change the corresponding size of bone harvesting end 7 according to different disease conditions. In addition, the bone harvesting end 7 is also equipped with a scale line 71 to indicate the depth of bone harvesting, and the observation port 72 is set to facilitate the observation of the movement position of push plate 92 and ensure the accuracy of adjustment.

[0030] Example 2 Reference Figures 8-10Furthermore, the push assembly 9 includes a push rod 91, which is slidably connected to the inner wall of the sliding hole 53. The outer wall of the push rod 91 has several inclined grooves 94 that cooperate with the button 62. One end of the push rod 91 is fixedly connected to a push ball 95. The outer wall of the push ball 95 has a limiting groove 951. The limiting groove 951 contains a buffer spring 10 and a contact switch 11. The two ends of the buffer spring 10 are fixedly connected to the inner wall of the limiting groove 951 and the side wall of the contact switch 11, respectively. The contact switch 11 is slidably connected to the inner wall of the limiting groove 951. A push plate 92 is fixedly connected to the end of the push rod 91 away from the push ball 95. A stepped groove 9101 is formed inside the push rod 91. A groove 921 is formed on the side of the push plate 92 away from the push rod 91. A cavity 97 is formed inside the push plate 92. An extension groove 971 is formed on the inner wall of the cavity 97. The inner wall of the extension groove 971 is fixedly connected to... The pressure sensor 98 has an electromagnetic ring 911 at the opening of the extension groove 971. The stepped groove 9101 has a return spring 99 and a push rod 910 inside. The push rod 910 is slidably connected to the inner wall of the stepped groove 9101. One end of the push rod 910 penetrates the inner wall of the cavity 97. The return spring 99 is sleeved on the outside of the push rod 910. The two ends of the return spring 99 are fixedly connected to the inner wall of the stepped groove 9101 and the side wall of the push rod 910, respectively. The cavity 97 has a movable plate 96 slidably connected inside. One side of the movable plate 96 is fixedly connected to several arrayed separation rods 93. One end of the separation rod 93 penetrates the side wall of the groove 921. The other side of the movable plate 96 is fixedly connected to a pressure rod 912. The outer wall of the pressure rod 912 is sleeved with a magnetic block 913. The inner diameter of the pressure rod 912 is smaller than the inner diameter of the extension groove 971. The side wall of the movable plate 96 is fixedly connected to one end of the push rod 910.

[0031] Pressure monitoring of push component 9: The pressure monitoring system of push component 9 achieves precise force feedback control through the contact between push plate 92 and diseased bone. The groove 921 at the front end of push plate 92 is designed to fit well with the surface of bone block, which increases the contact area and effectively disperses the concentrated stress during the push process, preventing the bone block from breaking during operation. In the internal cavity 97 of push plate 92, key components such as movable plate 96, separation rod 93, pressure rod 912 and magnetic block 913 are cleverly set up to form a complete force transmission and response mechanism.

[0032] When the doctor operates the bone harvesting instrument to harvest bone, the push plate 92 contacts the diseased bone and generates pressure. The separation rod 93 initially bears the force, pushing the movable plate 96 towards the electromagnetic ring 911. As the pressure continues to increase, the pressure rod 912 further compresses, precisely transmitting the force to the pressure sensor 98. This sensor adopts a medical-grade piezoelectric design, possessing excellent waterproof and corrosion-resistant properties. It can collect contact pressure in real time and convert it into a precise electrical signal. The signal is transmitted through a built-in micro-wire to the signal processing module inside the outer rod 5. After professional filtering and amplification, interference factors such as knocking and vibration are eliminated, and finally... The pressure value is converted into an intuitive value and displayed in real time on the LED high-definition display screen of the outer rod 5 (shown in the figure but not labeled). At the same time, the electromagnetic ring 911, which is electrically connected to the pressure sensor 98, is immediately energized after receiving a valid signal, generating a strong magnetic attraction. Since the magnetic block 913 on the outer wall of the pressure rod 912 and the electromagnetic ring 911 have opposite polarities, according to the principle of magnetic attraction between opposite poles, the electromagnetic ring 911 can firmly attract the magnetic block 913, thereby fixing the position of the movable plate 96. During this process, the return spring 99 is stretched, storing sufficient elastic potential energy, which prepares for the subsequent bone block separation action.

[0033] In addition, to improve the precision of surgical procedures, the system can be equipped with a prompting mechanism. For example, multiple indicator lights can be set on the main body of the outer rod 5. When the pressure value is lower than the preset range, the green indicator light flashes and is accompanied by a low-frequency beep, prompting the doctor to appropriately increase the tapping force or adjust the bone harvesting angle. When the pressure is within the ideal range, the blue indicator light stays on without a beep, indicating that the operating force is appropriate. When the pressure exceeds the safety threshold, the red indicator light flashes rapidly and emits a high-frequency continuous beep, with the beep volume increasing with the degree of pressure exceeding the limit, strongly warning the doctor to stop the operation immediately to avoid further damage to the bone. The above operations can reduce the doctor's repeated observation process, thereby improving efficiency.

[0034] The anti-adhesion effect of the separation rod 93 on the diseased bone: When the diseased bone is pushed to the designated position and "bone block separation" needs to be completed, the push rod 91 continues to move, which will cause the push ball 95 to further contact with the slide rod 21. After the push ball 95 is squeezed by the slide rod 21, the contact switch 11 in its internal limiting groove 951 is triggered (the contact force between the hemispherical groove 22 and the push ball 95 is transmitted to the contact switch 11). Since the contact switch 11 is electrically connected to the electromagnetic ring 911, the contact switch 11 immediately cuts off the power supply to the electromagnetic ring 911 after being pressed. The magnetism of the electromagnetic ring 911 disappears, and the attraction force on the magnetic block 913 is released. At this time, the originally stretched return spring 99 (when the moving plate 96 moves, it drives the push rod 91) is released. The tension return spring 99 begins to recover its deformation, generating a reverse pulling force to move the top rod 910 inside the stepped groove 9101. The top rod 910 is fixedly connected to the movable plate 96, which in turn drives the movable plate 96 to slide in the opposite direction. The separation rod 93 on one side of the movable plate 96 moves together, and one end of it that penetrates the side wall of the groove 921 begins to pop out, directly acting on the diseased bone that is attached to the surface of the groove 921. Through the simultaneous force exerted by several arrayed separation rods 93, the bone fragments are quickly peeled off from the push plate 92, completely avoiding the problem of bone fragment adhesion caused by blood viscosity, negative pressure effect or surface tension, realizing the automatic pop-out of bone fragments, reducing the operation steps of doctors manually peeling bone fragments, and improving surgical efficiency.

[0035] It should be noted that the specific model and specifications need to be selected and determined based on the actual specifications of the device. The specific selection and calculation method adopts the existing technology in this field, so it will not be described in detail here.

[0036] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. An elliptical bone harvester, comprising a handle (4) and an outer rod (5), wherein the handle (4) is connected to a mounting rod (8), a striking end (3) is fixedly connected to the side wall of the handle (4), and a bone harvesting end (7) is provided at one end of the outer rod (5), characterized in that, One end of the bone harvesting end (7) is threadedly connected to the end of the outer rod (5) away from the handle (4), and the other end of the bone harvesting end (7) is elliptical. One end of the handle (4) is provided with a knob (1), and one end of the knob (1) is provided with a screw (2) and a slide rod (21). It also includes: Pushing component (9), the pushing component (9) is located inside the outer rod (5), the pushing component (9) is used to push the diseased bone out from inside the bone harvesting end (7); The pushing component (9) includes a push rod (91), one end of which is fixedly connected to a push ball (95). A limiting groove (951) is provided on the outer wall of the push ball (95). A buffer spring (10) and a contact switch (11) are provided inside the limiting groove (951). The two ends of the buffer spring (10) are fixedly connected to the inner wall of the limiting groove (951) and the side wall of the contact switch (11), respectively. The contact switch (11) is slidably connected to the inner wall of the limiting groove (951). The push rod (91) is fixedly connected to a push plate (92) at the end away from the push ball (95). A stepped groove (9101) is formed inside the push rod (91). A groove (921) is formed on the side of the push plate (92) away from the push rod (91). A cavity (97) is formed inside the push plate (92). An extension groove (971) is formed on the inner wall of the cavity (97). A pressure sensor (98) is fixedly connected to the inner wall of the extension groove (971). An electromagnetic ring (911) is provided at the opening. A return spring (99) and a push rod (910) are provided inside the stepped groove (9101). The push rod (910) is slidably connected to the inner wall of the stepped groove (9101). One end of the push rod (910) penetrates the inner wall of the cavity (97). The return spring (99) is sleeved on the outside of the push rod (910). The two ends of the return spring (99) are fixedly connected to the inner wall of the stepped groove (9101) and the side wall of the push rod (910), respectively. The cavity (97) is slidably connected to a movable plate (96). A plurality of arrayed separation rods (93) are fixedly connected to one side of the movable plate (96). One end of the separation rod (93) penetrates the side wall of the groove (921). A pressure rod (912) is fixedly connected to the other side of the movable plate (96). A magnetic block (913) is sleeved on the outer wall of the pressure rod (912). The inner diameter of the pressure rod (912) is smaller than the inner diameter of the extension groove (971). The side wall of the movable plate (96) is fixedly connected to one end of the top rod (910). Limiting component (6), which is fixedly connected to the outer rod (5), is used to adjust the position of the fixed pushing component (9).

2. The elliptical bone harvester according to claim 1, characterized in that, One end of the knob (1) is fixedly connected to the screw (2), and the end of the screw (2) away from the knob (1) is fixedly connected to the slide rod (21). The outer diameter of the slide rod (21) is smaller than the outer diameter of the screw (2), and a hemispherical groove (22) is provided at the end of the slide rod (21) away from the screw (2).

3. The elliptical bone harvester according to claim 1, characterized in that, The grip (4) is T-shaped. The inner wall of the grip (4) is in contact with the outer wall of one end of the outer rod (5). One end of the outer rod (5) is provided with a slot (52) that cooperates with the mounting rod (8). The grip (4) and the outer rod (5) are fixedly connected by the slot (52) and the mounting rod (8).

4. An elliptical bone harvester according to claim 2, characterized in that, The inner wall of the outer rod (5) is provided with a sliding hole (53), and one end of the inner wall of the sliding hole (53) is provided with a threaded groove (51) that cooperates with the screw (2). The inner wall of the sliding hole (53) is slidably connected to the sliding rod (21).

5. An elliptical bone harvester according to claim 4, characterized in that, The limiting component (6) includes an extension block (61) and a button (62). The extension block (61) is fixedly connected to the outer wall of the outer rod (5). The side wall of the extension block (61) is provided with a placement groove (63). The inner wall of the placement groove (63) is provided with a slot (65) and a hole (64).

6. An elliptical bone harvester according to claim 5, characterized in that, One end of the button (62) is provided with a second slot (67), and the inside of the second slot (67) is provided with a telescopic spring (66). The two ends of the telescopic spring (66) abut against the inner walls of the second slot (67) and the first slot (65) respectively. The button (62) is located inside the placement groove (63). The side wall of the button (62) is detachably connected with a pin (68), and the pin (68) is rotatably connected to the inner wall of the placement groove (63).

7. An elliptical bone harvester according to claim 1, characterized in that, The outer wall of the bone harvesting end (7) is provided with a scale line (71), and the outer wall of the bone harvesting end (7) is provided with an observation port (72).

8. An elliptical bone harvester according to claim 6, characterized in that, The push rod (91) is slidably connected to the inner wall of the sliding hole (53), and the outer wall of the push rod (91) is provided with a number of inclined grooves (94) that cooperate with the button (62).

Images