Ultrasonic scalpel with replaceable blade shaft for minimally invasive surgery

Abstract

The present application discloses an ultrasonic scalpel with a replaceable blade for minimally invasive surgery, relating to the technical field of medical devices. The device comprises a blade mechanism and a handle mechanism; the support sleeve, surgical blade, and clamp transmission tube within the blade mechanism are all inserted into the handle body, the surgical blade is threadedly connected to the transducer, and the clamp transmission tube is connected to the trigger assembly via a linkage mechanism. The blade mechanism and the handle mechanism are detachably connected, and after assembly, the trigger assembly can be driven by the linkage mechanism to operate the clamp assembly. This does not affect the clamping effect during surgery, and only the blade mechanism needs to be handled after the surgery is completed, thereby reducing the consumption of the handle mechanism and lowering the cost of surgery.

Description

Technical Field

[0001] The present application relates to the technical field of medical devices, and in particular to an ultrasonic scalpel with a replaceable scalpel shaft for use in minimally invasive surgery. Background Art

[0002] In recent years, with its use in various surgical procedures, ultrasonic scalpels have played a key role in the treatment of gastrointestinal bleeding, strictures, polypectomy, and tumor resection. These advantages have led to their widespread use in the market. Currently, ultrasonic scalpels commonly use an integrated blade and handle, making both the blade and handle disposable surgical consumables, increasing surgical costs and wasting resources. Summary of the Invention

[0003] In order to reduce surgical costs and minimize resource waste, the present application provides an ultrasonic scalpel with a replaceable blade shaft for use in minimally invasive surgery.

[0004] The present application provides an ultrasonic scalpel with a replaceable blade shaft for minimally invasive surgery, which adopts the following technical solution:

[0005] An ultrasonic scalpel with a replaceable scalpel shaft for minimally invasive surgery, comprising a scalpel shaft mechanism and a handle mechanism;

[0006] The knife bar mechanism includes a supporting sleeve, a surgical knife bar and a clamping assembly;

[0007] The clamping assembly includes a clamp transmission tube and a clamping member; the clamp transmission tube is slidably connected to the support sleeve, and the clamping member is hinged to the support sleeve and the end of the clamp transmission tube; the surgical knife rod is slidably connected to the clamp transmission tube;

[0008] The handle mechanism includes a handle body and a trigger assembly, a linkage mechanism and a transducer installed in the handle body;

[0009] The handle body is provided with an open end, the support sleeve, the clamp transmission tube and the surgical knife rod can be inserted into the handle body along the open end, and the surgical knife rod can be threadedly connected to the output end of the transducer;

[0010] After the surgical knife rod and the transducer are assembled, the linkage mechanism connects the clamp transmission tube and the trigger assembly.

[0011] By adopting the above technical solution, the knife bar mechanism and the handle mechanism can be detachably connected, and after the knife bar mechanism and the handle mechanism are assembled, the trigger assembly can drive the clamping assembly to work through the linkage mechanism, which does not affect the clamping effect during the operation, and only the knife bar mechanism needs to be processed after the operation is completed, thereby reducing the consumption of the handle mechanism and reducing the cost of surgery.

[0012] Preferably, a limiting member for limiting relative rotation is provided between the surgical knife rod and the fixture transmission tube, and between the fixture transmission tube and the support sleeve;

[0013] A one-way toggle assembly is provided between the surgical knife rod and the clamp transmission tube. When the surgical knife rod moves in a direction away from the clamping member, the one-way toggle assembly can drive the clamp transmission tube to move in the same direction.

[0014] By adopting the above technical solution, when assembling the knife rod mechanism and the handle mechanism, the support sleeve, the clamp transmission tube and the surgical knife rod are first inserted into the open end of the handle body, and then the support sleeve is rotated relative to each other. Since there are limiters between the surgical knife rod and the clamp transmission tube, and between the clamp transmission tube and the support sleeve to limit their relative rotation, the clamp transmission tube and the surgical knife rod rotate with the support sleeve, so that the surgical knife rod is threadedly connected to the transducer. At the same time, the surgical knife rod drives the clamp transmission tube to be inserted into the handle body through the one-way toggle component to complete the assembly. The assembly process is simple to operate, which greatly improves the installation efficiency and reduces the safety hazards during the operation.

[0015] Preferably, the linkage mechanism includes an inner sliding tube and a bayonet assembly provided on the inner sliding tube;

[0016] The inner sliding tube is slidably connected to the handle body, and an elastic buffer is provided in the handle body to prevent the inner sliding tube from moving in a direction away from the clamping member; the clamp transmission tube can be passed through the inner sliding tube, and a clamping hole is provided on the side wall of the clamp transmission tube to cooperate with the bayonet assembly;

[0017] When the support sleeve is inserted into the handle body, it pushes the inner sliding tube to move. When the support sleeve is inserted into the assembly position in the handle body, the bayonet assembly is inserted into the bayonet hole.

[0018] By adopting the above technical solution, after the knife bar mechanism and the handle body are assembled, the snap-in hole on the clamp transmission tube is then snap-fitted with the bayonet assembly. While completing the assembly of the knife bar mechanism and the handle body, the clamping assembly and the trigger assembly are connected in transmission, which is more convenient to use and improves assembly efficiency.

[0019] Preferably, the linkage mechanism further comprises a transition assembly, the transition assembly comprising a transition sleeve slidably connected to the outer peripheral side of the inner sliding tube, the transition sleeve being located at an end of the bayonet assembly away from the clamping member, and a connecting ring groove for engaging with the trigger assembly is formed on the outer peripheral side of the transition sleeve;

[0020] A limiting block is fixedly connected to the inner circumference of the transition sleeve, and a limiting groove is provided on the inner sliding tube at a position corresponding to the limiting block. The track direction of the limiting groove is arranged along the axial direction of the inner sliding tube, and the limiting block is slidably connected in the limiting groove;

[0021] During the process of inserting the support sleeve into the handle body to the assembly position, the end of the limiting groove close to the bayonet assembly never contacts and is tightly pressed against the limiting block.

[0022] By adopting the above technical solution, the sliding range of the limit block is limited by the limit groove, thereby limiting the relative sliding range between the transition sleeve and the inner sliding tube, so that the transition component neither hinders the assembly between the clamp transmission tube and the inner sliding tube, but also enables the inner sliding tube that has been assembled with the clamp transmission tube to move backward under the drive of the trigger assembly, so that the clamping part can rotate toward the direction of the surgical knife rod to ensure the clamping effect.

[0023] Preferably, the bayonet assembly includes a receiving hole formed on the side wall of the inner sliding tube, wherein a limiting ball is provided in the receiving hole;

[0024] The bayonet assembly further includes a limiting sleeve sleeved on the inner sliding tube, the limiting sleeve restricting the limiting ball from leaving the accommodating hole, and a movable gap is provided between the inner side wall of the limiting sleeve and the limiting ball, so that the bottom of the limiting ball can move to a position flush with the bottom of the accommodating hole;

[0025] A compression ring is coaxially fixedly connected to the inner side of the limiting sliding sleeve, and the compression ring is slidably connected to the inner sliding tube; a compression spring is provided between the limiting sliding sleeve and the transition sleeve for abutment and compression;

[0026] When the support sleeve is inserted into the handle body to the assembly position, the clamping ring presses the limiting ball into the accommodating hole and the clamping hole at the same time under the action of the clamping spring.

[0027] By adopting the above technical solution, when assembling the tool bar mechanism and the handle mechanism, the support sleeve pushes the inner slide tube backward to the assembly position, causing the clamping ring to contact and press the limiting ball, thereby pressing the limiting ball into the clamping hole, thereby achieving the connection between the clamp transmission tube and the inner slide tube. When disassembling the tool bar mechanism and the handle mechanism, the support sleeve is pulled out, and the inner slide tube moves forward under the action of the elastic buffer, and the clamping ring releases the restriction on the limiting ball, allowing the clamp transmission tube to be removed together with the support sleeve. This structure makes the assembly and disassembly process of the tool bar mechanism and the handle mechanism simple to operate, easy to use, and convenient for replacing the tool bar mechanism.

[0028] Preferably, the elastic buffer is a spring that withstands axial tension, and the elastic buffer is sleeved on the outer peripheral side of the inner sliding tube. The end of the inner sliding tube away from the transition sleeve is fixedly connected to a retaining ring, and the two ends of the elastic buffer are respectively fixedly connected to the retaining ring and the transition sleeve.

[0029] By adopting the above technical solution, when assembling the knife bar mechanism and handle mechanism, the support sleeve pushes the inner slide tube to move. Because the trigger assembly restricts the movement of the transition sleeve, the elastic buffer continues to stretch as the inner slide tube moves, providing a buffering and shock-absorbing effect on the inner slide tube, making the inner slide tube more stable during movement. Furthermore, when the knife bar mechanism and handle mechanism need to be disassembled, the support sleeve is pulled out of the handle body, and the elastic buffer can reset the inner slide tube, facilitating the next assembly.

[0030] Preferably, the elastic buffer is a wave spring.

[0031] By adopting the above technical solution, the elastic buffer is a wave spring, which ensures the buffering and reset functions while effectively improving the noise reduction capability.

[0032] Preferably, it also includes a detection mechanism for detecting whether the knife bar mechanism is reused.

[0033] By adopting the above technical solution and setting up a detection mechanism, the knife bar mechanism that has been reused can be detected in time, thereby reminding medical staff to replace the knife bar mechanism with a new one, thereby preventing medical accidents.

[0034] Preferably, the detection mechanism includes an NFC receiving coil provided in the handle body and an NFC transmitting coil provided on the support sleeve;

[0035] When the support sleeve is inserted into the assembly position in the handle body, the NFC receiving coil can receive the signal sent by the NFC transmitting coil, and the NFC receiving coil can be electrically connected to the external ultrasonic knife host.

[0036] By adopting the above technical solution and using short-range wireless communication technology, after the knife rod mechanism and the handle body are assembled, the NFC transmitting coil located on the knife rod mechanism sends a signal to the NFC receiving coil located in the handle body. The NFC receiving coil transmits the signal to the ultrasonic knife host for recording and storage. When the NFC receiving coil sends the same signal to the ultrasonic knife host, it indicates that the knife rod mechanism that has been used has been assembled with the handle body again, and medical staff is reminded in time to replace the new knife rod mechanism to avoid cross infection.

[0037] Preferably, a torque wrench for rotating the support sleeve is provided at the open end of the handle body.

[0038] By adopting the above technical solution, a torque wrench for rotating the support sleeve is provided on the handle body, which facilitates the assembly of the knife rod mechanism and the handle mechanism, and the torque wrench is provided on the handle body to prevent the torque wrench from being lost.

[0039] In summary, this application includes at least one of the following beneficial technical effects:

[0040] 1. The knife bar mechanism and the handle mechanism are detachably connected. After the knife bar mechanism and the handle mechanism are assembled, the trigger assembly can drive the clamping assembly to work through the linkage mechanism. This does not affect the clamping effect during the operation, and only the knife bar mechanism needs to be handled after the operation is completed, thereby reducing the consumption of the handle mechanism and lowering the cost of the operation.

[0041] 2. After the tool bar mechanism and the handle body are assembled, the engaging hole on the clamp transmission tube engages with the bayonet pin assembly. This allows the clamp assembly and the trigger assembly to be connected while the tool bar mechanism and the handle body are assembled, making it more convenient to use and improving assembly efficiency.

[0042] 3. Using short-range wireless communication technology, after the blade rod mechanism and the handle body are assembled, the NFC transmitting coil located on the blade rod mechanism sends a signal to the NFC receiving coil located in the handle body. The NFC receiving coil transmits the signal to the ultrasonic scalpel host for recording and storage. When the NFC receiving coil sends the same signal to the ultrasonic scalpel host, it indicates that the blade rod mechanism that has been used has been assembled with the handle body again, and promptly reminds medical staff to replace the new blade rod mechanism to avoid cross infection. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present application.

[0044] Figure 2 yes Figure 1 A partial enlarged schematic diagram of part A.

[0045] Figure 3 It is a schematic diagram showing the cross-sectional structure of the handle body in the embodiment of the present application.

[0046] Figure 4 yes Figure 3 A partial enlarged schematic diagram of part B.

[0047] Figure 5 It is a cross-sectional structural diagram showing the positional relationship among the inner sliding tube, the bayonet assembly and the transition assembly in the embodiment of the present application.

[0048] Figure 6 It is a schematic cross-sectional structure diagram showing the positional relationship among the support sleeve, the surgical knife rod and the clamp transmission tube in the embodiment of the present application.

[0049] Explanation of the accompanying drawings: 1. Support sleeve; 2. Surgical knife rod; 3. Clamping assembly; 31. Clamp transmission tube; 311. Clamping hole; 32. Clamping member; 4. Handle body; 41. Torque wrench; 5. Trigger assembly; 6. Linkage mechanism; 61. Inner sliding tube; 611. Retaining ring; 62. Elastic buffer; 63. Pin assembly; 631. Accommodating hole; 632. Limiting ball; 633. Pressure ring; 634. Pressure spring; 635. Limiting sleeve; 64. Transition assembly; 641. Transition sleeve; 6411. Connecting ring groove; 642. Limiting block; 643. Limiting groove; 7. Transducer; 8. One-way toggle assembly; 9. Detection mechanism; 91. NFC receiving coil; 92. NFC transmitting coil. DETAILED DESCRIPTION

[0050] The following is combined with Figure 1-6 This application is described in further detail.

[0051] The embodiment of the present application discloses an ultrasonic scalpel with a replaceable blade shaft for use in minimally invasive surgery.

[0052] Example

[0053] Combine Figure 1 and Figure 2 The invention discloses an ultrasonic scalpel with a replaceable blade for minimally invasive surgery, comprising a blade mechanism, a handle mechanism, and an ultrasonic scalpel main unit. The blade mechanism and the handle mechanism are detachably connected.

[0054] The scalpel bar mechanism includes a support sleeve 1, a scalpel bar 2, and a clamping assembly 3. The support sleeve 1 supports and protects the scalpel bar 2 and the clamping assembly 3. The scalpel bar 2 is used for surgical cutting, and the clamping assembly 3 is used to clamp the cutting part to facilitate the scalpel bar 2 to bear the force during cutting.

[0055] The support sleeve 1 is a circular tube. The clamping assembly 3 includes a clamp transmission tube 31 and a clamping member 32. The clamp transmission tube 31 is slidably connected to the support sleeve 1, and the scalpel rod 2 is slidably connected to the clamp transmission tube 31. The clamping member 32 is hinged to the ends of both the support sleeve 1 and the clamp transmission tube 31. When the support sleeve 1 and the clamp transmission tube 31 slide relative to each other, the clamping member 32 rotates toward or away from the scalpel rod 2 about the hinge axis between the support sleeve 1 and the clamp transmission tube 31. The end of the scalpel rod 2 closest to the clamping member 32 is configured in the shape of a blade head, and the end of the scalpel rod 2 away from the clamping member 32 is provided with an internal threaded hole.

[0056] Combine Figure 3 and Figure 4The handle mechanism includes a handle body 4 and a trigger assembly 5, a linkage mechanism 6, and a transducer 7 installed in the handle body 4. The handle body 4 is designed to be convenient for medical personnel to hold, and the handle body 4 adopts an ergonomic design. The handle body 4 is provided with an open end at one end facing the knife bar mechanism. The support sleeve 1, the clamp transmission tube 31, and the surgical knife bar 2 can all be inserted into the handle body 4 along the open end.

[0057] The linkage mechanism 6 is used to connect the clamping assembly 3 and the trigger assembly 5, so that after the knife bar mechanism and the handle mechanism are assembled, the medical staff can pull the trigger assembly 5 to drive the clamp transmission rod to move backward, so that the clamping member 32 is in a clamped state.

[0058] The transducer 7 converts electrical energy into mechanical energy, thereby providing power to the scalpel shaft 2. The end of the transducer 7, away from the open end of the handle body 4, is electrically connected to the ultrasonic scalpel main unit. An internally threaded hole is provided on the transducer 7, facing the open end of the handle body 4. The scalpel shaft 2 and the transducer 7 are threadedly connected via a double-start screw.

[0059] The knife rod mechanism and the handle mechanism are assembled and combined through a detachable connection method, which makes it convenient to remove the knife rod mechanism that is in direct contact with the human body for centralized treatment after the operation is completed, and retain the handle mechanism that is not in direct contact with the human body for continued use. This not only reduces the cost of the operation, but also reduces the waste of resources and prevents medical accidents such as cross infection.

[0060] Reference Figure 4 The linkage mechanism 6 includes an inner sliding tube 61, an elastic buffer 62, a bayonet assembly 63 and a transition assembly 64. The inner sliding tube 61 is slidably connected to the surgical body, and the axial direction of the inner sliding tube 61 is arranged along the direction of the open end of the handle body 4. When the support sleeve 1 is inserted into the handle body 4, the support sleeve 1 will push the inner sliding tube 61 to move backward until the support sleeve 1 is inserted into the assembly position and stops. When the clamp transmission tube 31 is inserted into the handle body 4, it will be inserted into the inner sliding tube 61, so that the clamp transmission tube 31 is slidably connected to the inner sliding tube 61, which overcomes the problem of difficulty in assembling the clamping assembly 3 and the trigger assembly 5 when the knife rod mechanism and the handle mechanism are detachably connected.

[0061] Combine Figure 3 and Figure 5 The pin assembly 63 and the transition assembly 64 are arranged in sequence along the axis of the inner sliding tube 61 away from the clamping member 32. The pin assembly 63 is used to connect the clamp transmission tube 31 with the inner sliding tube 61, and the transition assembly 64 is used to connect the inner sliding tube 61 and the trigger assembly 5.

[0062] The transition assembly 64 includes a transition sleeve 641 slidably connected to the outer circumference of the inner slide tube 61. A connecting annular groove 6411 is defined on the outer circumference of the transition sleeve 641, which engages with the trigger assembly 5. The trigger assembly 5 engages within the connecting annular groove 6411, allowing the transition sleeve 641 to move only when driven by the trigger assembly 5. A limit block 642 is fixedly connected to the inner circumference of the transition sleeve 641. A limit slot 643 is defined on the inner slide tube 61 at a position corresponding to the limit block 642. The track of the limit slot 643 is aligned with the axis of the inner slide tube 61, and the limit block 642 is slidably connected within the limit slot 643.

[0063] When the knife bar mechanism and the handle mechanism are not assembled, the stop block 642 is located on the stop slot 643, away from the open end of the handle body 4. When the knife bar mechanism and the handle mechanism are assembled, the stop block 642 is located on the stop slot 643, closer to the open end of the handle body 4. This ensures that when the support sleeve 1 pushes the inner slide tube 61 to move, the transition assembly 64 does not affect the movement of the inner slide tube 61. After assembly is complete, the trigger assembly 5 drives the stop block 642 to move backward and abut the stop slot 643, thereby driving the inner slide tube 61 to slide backward, causing the clamping member 32 to rotate toward the surgical knife bar 2.

[0064] The elastic buffer 62 is a spring that withstands axial tension. In the embodiment of the present application, the elastic buffer 62 is a wave spring. A retaining ring 611 is fixedly connected to the inner slide tube 61 at a position away from the open end of the handle body 4. The wave spring is sleeved on the outer circumference of the inner slide tube 61, and the ends of the wave spring are respectively fixedly connected to the retaining ring 611 and the transition sleeve 641.

[0065] As the support sleeve 1 pushes the inner slide 61 backward, the wave spring stabilizes its movement and reduces noise. When the arbor and handle mechanisms need to be disassembled, the support sleeve 1 is pulled out of the handle body 4, and the inner slide 61 is reset under the tension of the wave spring, facilitating the next assembly.

[0066] At least one engaging hole 311 cooperating with the bayonet assembly 63 is provided on the side wall of the clamp transmission tube 31. When the support sleeve 1 is inserted into the handle body 4 to the assembly position, the bayonet assembly 63 is engaged with the engaging hole 311 to realize the connection between the inner sliding tube 61 and the clamp transmission tube 31.

[0067] The latch assembly 63 includes at least one receiving hole 631 formed on the sidewall of the inner slide tube 61. The number of receiving holes 631 corresponds to the number of engaging holes 311. In this embodiment, both the number of receiving holes 631 and the number of engaging holes 311 are set to four. The four receiving holes 631 are evenly distributed around the circumference of the inner slide tube 61, and a limiting ball 632 is placed in each receiving hole 631. A limiting sleeve 635 is coaxially provided on the circumference of the inner sliding tube 61. The limiting sleeve 635 is used to limit the limiting ball 632 from disengaging from the accommodating hole 631, and a movable gap is provided between the inner side wall of the limiting sleeve 635 and the limiting ball 632. The limiting ball 632 can move freely in the movable gap, and the movable range of the limiting ball 632 can be appropriately adjusted while ensuring that the limiting ball 632 does not disengage from the accommodating hole 631. The adjustment method can be achieved by changing the distance between the inner side wall of the limiting sleeve 635 and the limiting ball 632. However, it should be noted that it is at least necessary to ensure that the limiting ball 632 can just pass through the side wall of the inner sliding tube 61 inwardly and move outwardly to a position flush with the bottom of the accommodating hole 631.

[0068] A compression ring 633 is coaxially fixedly connected to the inner circumference of the limiting sleeve 635, and the compression ring 633 is slidingly connected to the inner sliding tube 61. A compression spring 634 is abutted and compressed between the limiting sleeve 635 and the transition sleeve 641, and the compression spring 634 is sleeved on the inner sliding tube 61.

[0069] During assembly, when the support sleeve 1 is inserted into the handle body 4 to the assembly position, the support sleeve 1 pushes the inner slide tube 61 backward, so that the limiting ball 632 is in close contact with the clamping ring 633. Under the action of the clamping spring 634, the clamping ring 633 simultaneously presses the limiting ball 632 into the corresponding position of the receiving hole 631 and the clamping hole 311, thereby achieving the connection between the clamp transmission tube 31 and the inner slide tube 61. When disassembly is required, the support sleeve 1 is pulled outward, and the inner slide tube 61 moves forward under the action of the elastic buffer 62. The clamping ring 633 releases the restriction on the limiting ball 632, allowing the clamp transmission tube 31 to be pulled out and removed.

[0070] When clamping after assembly, the trigger assembly 5 is pulled, and the trigger assembly 5 drives the inner sliding tube 61 to move backward. At the same time, the limiting ball 632 pushes the limiting sleeve 635 to move backward. Under the action of the compression spring, the trigger assembly 5 drives the inner sliding tube 61 to move. During the process, the limiting sleeve 635 always presses the limiting ball 632, thereby driving the clamp transmission tube 31 to move backward, realizing the clamping effect of the clamping member 32.

[0071] To further improve installation efficiency, stoppers are installed between the scalpel rod 2 and the fixture transmission tube 31, and between the fixture transmission tube 31 and the support sleeve 1 to limit their relative rotation. This allows the scalpel rod 2 and the fixture transmission tube 31 to slide relative to each other only along their axial direction, and also allows the fixture transmission tube 31 and the support sleeve 1 to slide relative to each other only along their axial direction. Rotating the outermost support sleeve can then drive the scalpel rod 2 to rotate, facilitating the connection between the scalpel rod 2 and the transducer 7.

[0072] Reference Figure 6 A one-way toggle assembly 8 is also provided between the scalpel rod 2 and the fixture transmission tube 31. The one-way toggle assembly 8 includes a first toggle block fixed to the outer wall of the scalpel rod 2 and a second toggle block fixed to the inner wall of the fixture transmission tube 31. The first toggle block and the second toggle block are in contact with each other, and the first toggle block is located at the front end of the second toggle block. When the scalpel rod 2 is threadedly connected to the transducer 7, the scalpel rod 2 can drive the fixture transmission tube 31 to insert into the handle body 4 and push the inner slide tube 61 to move. Simultaneously, the scalpel rod 2 and the transducer 7 are threadedly connected, and the fixture transmission tube 31 and the trigger assembly 5 are assembled. This simplifies the assembly process, greatly improves installation efficiency, and reduces safety hazards during surgery.

[0073] Reference Figure 1 To further facilitate installation of the arbor mechanism and handle mechanism, a torque wrench 41 is rotatably connected to the open end of the handle body 4. The support sleeve 1 passes through the torque wrench 41 and extends into the open end of the handle body 4. A snap-fit ​​sleeve is provided on the support sleeve 1 at a position corresponding to the torque wrench 41. The torque wrench 41 and the snap-fit ​​sleeve are fixed together by a snap-fit ​​structure. After the support sleeve 1 is inserted into the open end of the handle body 4 along the torque wrench 41, the torque wrench 41 can be rotated relative to the torque wrench 41 to drive the support sleeve 1 to rotate, greatly facilitating installation and effectively preventing the torque wrench 41 from being lost.

[0074] Reference Figure 4 , in order to avoid reinstalling and using a knife bar mechanism that has been used, and to reduce medical accidents. A detection mechanism 9 is provided between the knife bar mechanism and the handle mechanism to detect whether the knife bar mechanism is reused. The detection mechanism 9 comprises an NFC receiving coil 91 fixed in the handle body 4 and an NFC transmitting coil 92 fixed on the outer wall of the support sleeve 1. The NFC receiving coil 91 is used to receive the signal emitted by the NFC transmitting coil 92. The signal emitted by the NFC transmitting coil 92 on each knife bar mechanism is different, and the information stored in the NFC transmitting coil 92 on each knife bar mechanism can be edited according to different needs, so that the signal emitted by the NFC transmitting coil 92 can represent the model and number of the corresponding knife bar mechanism.

[0075] The NFC receiving coil 91 is electrically connected to the ultrasonic scalpel main unit and transmits the received signal to the main unit, which analyzes, stores, and displays the signal, alerting medical personnel to the quality of the installed blade mechanism. Furthermore, the main unit can sound an alarm when receiving the same signal, prompting medical personnel to replace the blade mechanism with a new one, thus preventing reuse and cross-infection.

[0076] After the knife rod mechanism and the handle mechanism are assembled, the actual distance between the NFC receiving coil 91 and the NFC transmitting coil 92 just meets the distance required for their signal interaction, so that when the assembly is not completed or the assembly is unqualified, the ultrasonic knife host cannot receive any signal, which can serve to remind medical staff that the assembly is not completed.

[0077] The implementation principle of the above embodiment is:

[0078] The knife rod mechanism and the handle mechanism are assembled and combined through a detachable connection method, which makes it convenient to remove the knife rod mechanism that is in direct contact with the human body for centralized treatment after the operation is completed, and retain the handle mechanism that is not in direct contact with the human body for continued use. This not only reduces the cost of the operation, but also reduces the waste of resources and prevents medical accidents such as cross infection.

[0079] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. An ultrasonic scalpel with a replaceable blade shaft for minimally invasive surgery, characterized by: It includes a knife bar mechanism and a handle mechanism; The knife bar mechanism comprises a supporting sleeve (1), a surgical knife bar (2) and a clamping assembly (3); The clamping assembly (3) comprises a clamp transmission tube (31) and a clamping member (32); the clamp transmission tube (31) is slidably connected to the support sleeve (1), and the clamping member (32) is hinged to the end of the support sleeve (1) and the clamp transmission tube (31); the surgical knife rod (2) is slidably connected to the clamp transmission tube (31); The handle mechanism comprises a handle body (4), a trigger assembly (5), a linkage mechanism (6), and a transducer (7) installed in the handle body (4); The handle body (4) is provided with an open end, the support sleeve (1), the clamp transmission tube (31) and the surgical knife rod (2) can all be inserted into the handle body (4) along the open end, and the surgical knife rod (2) can be threadedly connected to the output end of the transducer (7); After the surgical knife rod (2) and the transducer (7) are assembled, the linkage mechanism (6) connects the clamp transmission tube (31) and the trigger assembly (5); the linkage mechanism (6) includes an inner sliding tube (61) and a bayonet assembly (63) provided on the inner sliding tube (61); The inner sliding tube (61) is slidably connected to the inside of the handle body (4), and an elastic buffer (62) is provided in the handle body (4) to prevent the inner sliding tube (61) from moving in a direction away from the clamping member (32); the clamp transmission tube (31) can be passed through the inner sliding tube (61), and a clamping hole (311) cooperating with the bayonet assembly (63) is provided on the side wall of the clamp transmission tube (31); When the support sleeve (1) is inserted into the handle body (4), it pushes the inner slide tube (61) to move. When the support sleeve (1) is inserted into the assembly position in the handle body (4), the bayonet assembly (63) is inserted into the bayonet hole (311); A one-way toggle assembly (8) is provided between the surgical knife rod (2) and the clamp transmission tube (31). When the surgical knife rod (2) moves in a direction away from the clamping member (32), the one-way toggle assembly (8) can drive the clamp transmission tube (31) to move in the same direction. The one-way toggle assembly (8) includes a first toggle block fixed on the outer side wall of the surgical knife rod (2) and a second toggle block fixed on the inner side wall of the clamp transmission tube (31). The first toggle block and the second toggle block are in contact with each other, and the first toggle block is located at the front end of the second toggle block. When the surgical knife rod (2) is threadedly connected to the transducer (7), the surgical knife rod (2) can drive the clamp transmission tube (31) to insert into the handle body (4) and push the inner sliding tube (61) to move, so that the surgical knife rod (2) and the transducer (7) are threadedly connected at the same time, and the clamp transmission tube (31) and the trigger assembly (5) are assembled.

2. The ultrasonic scalpel with a replaceable blade shaft for minimally invasive surgery according to claim 1, characterized in that: Limiting members for limiting relative rotation are provided between the surgical knife rod (2) and the clamp transmission tube (31), and between the clamp transmission tube (31) and the support sleeve (1).

3. The ultrasonic scalpel with a replaceable blade shaft for minimally invasive surgery according to claim 2, characterized in that: The linkage mechanism (6) further includes a transition assembly (64), the transition assembly (64) including a transition sleeve (641) slidably connected to the outer peripheral side of the inner sliding tube (61), the transition sleeve (641) being located at an end of the bayonet assembly (63) away from the clamping member (32), and a connecting ring groove (6411) for engaging with the trigger assembly (5) is provided on the outer peripheral side of the transition sleeve (641); A limiting block (642) is fixedly connected to the inner circumference of the transition sleeve (641), and a limiting groove (643) is provided on the inner sliding tube (61) at a position corresponding to the limiting block (642). The track direction of the limiting groove (643) is arranged along the axial direction of the inner sliding tube (61), and the limiting block (642) is slidably connected in the limiting groove (643); During the process of inserting the support sleeve (1) into the handle body (4) to the assembly position, the end of the limiting groove (643) close to the bayonet assembly (63) never contacts and presses against the limiting block (642).

4. The ultrasonic scalpel with a replaceable blade shaft for minimally invasive surgery according to claim 3, characterized in that: The bayonet assembly (63) includes a receiving hole (631) formed on the side wall of the inner sliding tube (61), and a limiting ball (632) is disposed in the receiving hole (631); The latch assembly (63) further includes a limiting sleeve (635) sleeved on the inner sliding tube (61), wherein the limiting sleeve (635) limits the limiting ball (632) from being separated from the accommodating hole (631), and a movable gap is provided between the inner side wall of the limiting sleeve (635) and the limiting ball (632), so that the bottom of the limiting ball (632) can move to a position flush with the bottom of the accommodating hole (631); A clamping ring (633) is coaxially fixedly connected to the inner limiting sliding sleeve (635), and the clamping ring (633) is slidably connected to the inner sliding tube (61); a clamping spring (634) is provided between the limiting sliding sleeve (635) and the transition sleeve (641) for abutting and clamping. When the support sleeve (1) is inserted into the handle body (4) to the assembly position, the clamping ring (633) simultaneously presses the limiting ball (632) into the accommodating hole (631) and the clamping hole (311) under the action of the clamping spring (634).

5. The ultrasonic scalpel with a replaceable blade shaft for minimally invasive surgery according to claim 4, characterized in that: The elastic buffer (62) is a spring that bears axial tension. The elastic buffer (62) is sleeved on the outer peripheral side of the inner sliding tube (61). One end of the inner sliding tube (61) away from the transition sleeve (641) is fixedly connected to a retaining ring (611). The two ends of the elastic buffer (62) are respectively fixedly connected to the retaining ring (611) and the transition sleeve (641).

6. The ultrasonic scalpel with a replaceable blade shaft for minimally invasive surgery according to claim 5, characterized in that: The elastic buffer (62) is a wave spring.

7. The ultrasonic scalpel with a replaceable blade shaft for minimally invasive surgery according to claim 1, characterized in that: It also includes a detection mechanism (9) for detecting whether the knife bar mechanism is reused.

8. The ultrasonic scalpel with a replaceable blade shaft for minimally invasive surgery according to claim 7, characterized in that: The detection mechanism (9) comprises an NFC receiving coil (91) disposed in the handle body (4) and an NFC transmitting coil (92) disposed on the support sleeve (1); When the support sleeve (1) is inserted into the assembly position in the handle body (4), the NFC receiving coil (91) can receive the signal sent by the NFC transmitting coil (92), and the NFC receiving coil (91) can be electrically connected to the external ultrasonic knife host.

9. The ultrasonic scalpel with a replaceable blade shaft for minimally invasive surgery according to claim 1, characterized in that: The open end of the handle body (4) is provided with a torque wrench (41) for rotating the support sleeve.

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