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WO2024188131A1 - Dispositif chirurgical - Google Patents

Dispositif chirurgical Download PDF

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Publication number
WO2024188131A1
WO2024188131A1 PCT/CN2024/080359 CN2024080359W WO2024188131A1 WO 2024188131 A1 WO2024188131 A1 WO 2024188131A1 CN 2024080359 W CN2024080359 W CN 2024080359W WO 2024188131 A1 WO2024188131 A1 WO 2024188131A1
Authority
WO
WIPO (PCT)
Prior art keywords
fine
tuning
surgical instrument
bracket
tool assembly
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
PCT/CN2024/080359
Other languages
English (en)
Chinese (zh)
Inventor
丁水澄
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Touchstone International Medical Science Co Ltd
Original Assignee
Touchstone International Medical Science Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from CN202320456822.5U external-priority patent/CN220025110U/zh
Priority claimed from CN202310231715.7A external-priority patent/CN118614975A/zh
Application filed by Touchstone International Medical Science Co Ltd filed Critical Touchstone International Medical Science Co Ltd
Publication of WO2024188131A1 publication Critical patent/WO2024188131A1/fr
Anticipated expiration legal-status Critical
Pending legal-status Critical Current

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Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods
    • A61B17/068—Surgical staplers, e.g. containing multiple staples or clamps
    • A61B17/072—Surgical staplers, e.g. containing multiple staples or clamps for applying a row of staples in a single action, e.g. the staples being applied simultaneously

Definitions

  • the present disclosure relates to the technical field of medical instruments, and in particular, to a surgical instrument for stapling (and cutting) tissues during surgery.
  • the tool assembly can be switched from an open state to a closed state to shorten the distance between the nail magazine and the nail anvil. Then, the tool assembly can be fired to nail the tissue.
  • the spacing between the nail magazine and the nail anvil should be suitable for placing the tissue between the two.
  • the spacing between the nail magazine and the nail anvil should be suitable for good shaping of the nails and good nailing of the tissue, and it should be ensured that the tissue will not be damaged due to excessive squeezing by the nail magazine and the nail anvil.
  • Conventional surgical instruments can only switch the tool assembly from an open state to a closed state in which the nail magazine and the nail anvil have a specific spacing, which results in that when the tool assembly is in the closed state, the specific spacing between the nail magazine and the nail anvil is difficult to adapt to tissues of different thicknesses. If the specific spacing is too large or too small relative to the thickness of the tissue to be treated, it may lead to many undesirable consequences, such as poor nail formation, poor nailing of tissues, or tissue damage caused by excessive squeezing of the tissue by the nail magazine and the nail anvil.
  • the present disclosure provides a surgical instrument that can be preferably applied to tissues of different thicknesses and can relatively quickly and conveniently switch a tool assembly from an open state to a closed state.
  • the doctor can switch the tool assembly from the open state to the pre-closed state by operating the trigger to significantly shorten the distance between the nail magazine and the nail anvil. Then, the doctor can fine-tune the distance between the nail magazine and the nail anvil by operating the fine-adjustment operating member to gradually (or continuously) shorten the distance between the nail magazine and the nail anvil to match the thickness of the tissue to be treated, and then switch the tool assembly to the closed state.
  • the surgical instrument can be preferably applied to tissues of different thicknesses, and the tool assembly can be switched from the open state to the closed state more quickly and conveniently.
  • the actuating mechanism includes a bracket, and one of the nail magazine and the nail anvil is fixed to the bracket and located distally of the other, so that as the bracket moves in a proximal direction from its first position to its second position under the drive of the trigger, the tool assembly switches from the first state to the second state.
  • the anvil will move in the proximal direction with the bracket, so that the distance between the nail magazine and the anvil will be shortened, and then the tool assembly will switch from the first state to the second state.
  • the fine-adjustment mechanism is configured to drive the bracket to move in a proximal direction to fine-adjust the distance between the nail magazine and the nail anvil after the bracket reaches its second position.
  • the fine-tuning mechanism uses the bracket of the actuator mechanism to achieve transmission between it and the tool assembly, which helps to reduce the number of components of the surgical instrument, thereby helping to reduce the overall size, overall weight and manufacturing cost of the surgical instrument, and helps to improve the reliability of the surgical instrument.
  • the stent further includes a screw-engaging portion
  • the fine-tuning mechanism further includes a fine-tuning member
  • the fine-tuning member is configured to drive the stent to move in a proximal direction by screwing with the screw-engaging portion.
  • this implementation has many advantages.
  • this implementation has a large speed reduction transmission ratio, which can ensure a high adjustment accuracy.
  • the bracket will only move a small distance in the proximal direction, which allows the doctor to accurately and smoothly fine-tune the spacing between the nail magazine and the nail anvil.
  • the bracket after the bracket is driven by the fine-tuning member to move in the proximal direction, even if the doctor releases the fine-tuning operating member, the bracket will not be separated from the fine-tuning member and accidentally return to its second position. Therefore, this implementation has a higher safety.
  • this implementation has a large speed reduction transmission ratio, the operation of rotating the fine-tuning operating member is more labor-saving.
  • the fine-tuning operating member is provided with a accommodating space for accommodating the fine-tuning operating member, and the fine-tuning operating member is constructed to be movable in the distal-proximal direction relative to the fine-tuning operating member and to rotate with the fine-tuning operating member, wherein the fine-tuning operating member is located on the proximal side of the screw-fitting portion, and the fine-tuning mechanism also includes a first force-applying member, which applies force to the fine-tuning member in the distal direction, so that when the bracket is in its second position, the first force-applying member presses the fine-tuning member against the screw-fitting portion.
  • the fine-tuning operating member is also provided with an exposure hole extending from the accommodating space to the proximal end surface of the fine-tuning operating member
  • the fine-tuning mechanism also includes an indicator member
  • the indicator member includes a flange portion located on its outer periphery
  • the first force-applying member is an elastic member disposed on the distal side of the fine-tuning member
  • the flange is located between the fine-tuning member and the elastic member
  • the indicator can help the doctor to relatively accurately judge the state of the tool assembly and the spacing between the nail cartridge and the nail anvil.
  • the actuating mechanism also includes: a moving member movable in a distal-proximal direction; a fixed pulley; and a flexible member wound around the fixed pulley and having its two ends respectively connected to the moving member and the bracket, so that as the moving member moves in a distal direction under the push of the trigger, the flexible member pulls the bracket to move in a proximal direction.
  • the support includes a slender portion extending in the distal-proximal direction, and the moving member is sleeved on the slender portion to be slidably supported by the slender portion in the distal-proximal direction.
  • the actuating mechanism further includes a second force applying member, which is configured to apply force to the moving member in a distal direction.
  • the flexible member connected to the moving member will remain tensioned, which is conducive to preventing the flexible member from accidentally falling off the pulley.
  • the force applied by the second force applying member on the moving member will make the doctor's operation more labor-saving.
  • the actuating mechanism also includes: a third force-applying member, configured to apply force to the bracket in a distal direction; and a blocking member, configured to block the movement of the moving member in a proximal direction after the bracket reaches the second position, so as to releasably restrict the bracket from returning from its second position to its first position.
  • the doctor can operate the blocking member to release the moving member.
  • the moving member will move in the proximal direction under the action of the force applied by the force-applying member, thereby driving the bracket to return to its first position, thereby causing the tool assembly to switch to the first state to release the tissue between the nail magazine and the nail anvil. It can be seen that through the force-applying member and the blocking member, the operation of closing and opening the tool assembly will be more convenient and reliable.
  • the blocking member includes: an operating portion, which is configured to be operated by a doctor and is pivotally supported around a first axis; a blocking portion, which is configured to block the proximal movement of the moving member and is pivotally supported around a second axis substantially parallel to the first axis; and a connecting portion, which extends between the operating portion and the blocking portion and is integrally formed with the two, and is configured to deform when the operating portion is rotated to cause the blocking portion to rotate to release the moving member.
  • this implementation only one component (i.e., the blocking component) can releasably block the movement of the moving component in the proximal direction. Therefore, this implementation is conducive to reducing the number of components of the surgical instrument, thereby helping to reduce the overall size, overall weight and manufacturing cost of the surgical instrument, and helping to improve the reliability of the surgical instrument.
  • the surgical instrument further includes a housing, a support is movably supported by the housing in a distal-proximal direction, and one of the nail cartridge and the nail anvil is fixed to the support and the other is fixed to the housing.
  • the surgical instrument further includes a firing mechanism, and the firing mechanism is configured to fire the tool assembly.
  • a knife is further provided in the nail magazine, wherein when the tool assembly is fired, the knife is pushed out of the nail magazine to cut tissue.
  • FIG. 1 is a schematic structural diagram of a surgical instrument according to an embodiment of the present disclosure.
  • FIG. 2 is a schematic structural diagram showing the internal structure of the surgical instrument in FIG. 1 .
  • FIG. 3 is another schematic structural diagram showing the internal structure of the surgical instrument in FIG. 1 .
  • FIG. 4 is another schematic structural diagram showing the internal structure of the surgical instrument in FIG. 1 .
  • FIG. 5 is another schematic structural diagram showing the internal structure of the surgical instrument in FIG. 1 .
  • FIG. 6 is a schematic structural diagram of a moving part according to an embodiment of the present disclosure.
  • FIG. 7 is a schematic structural diagram of the moving part in FIG. 6 observed from another viewing direction.
  • FIG. 8 is an exploded schematic diagram of the moving parts in FIG. 6 .
  • FIG. 9 is a schematic structural diagram showing the fine-tuning mechanism and housing of the surgical instrument in FIG. 1 .
  • FIG. 10 is a schematic structural diagram showing the firing mechanism of the surgical instrument in FIG. 1 .
  • FIG. 11 is another schematic structural diagram showing the firing mechanism in FIG. 10 .
  • FIG. 12 is another schematic structural diagram showing the firing mechanism in FIG. 10 .
  • FIG. 13 is another schematic structural diagram showing the firing mechanism in FIG. 10 .
  • FIG. 14 is a schematic structural diagram of a pusher of the firing mechanism in FIG. 10 .
  • FIG. 15 is a schematic structural diagram of the pusher in FIG. 14 as viewed from another perspective.
  • FIG. 16 is a schematic structural diagram showing a portion of the housing of the surgical instrument in FIG. 1 .
  • FIG17 is a schematic cross-sectional view taken along line A-A in FIG16.
  • FIG. 18 is a schematic diagram showing the cooperation process between the legs and the guide member when the pusher in FIG. 14 moves in the distal direction.
  • FIG. 19 is a schematic diagram showing the cooperation process between the legs and the guide member when the pusher in FIG. 14 moves in the proximal direction.
  • FIG. 20 is a schematic diagram showing the structure of the push member in FIG. 14 and the spring piece placed in the placement groove thereof.
  • FIG. 21 is a schematic structural diagram of the distal end portion of the action member of the firing mechanism in FIG. 10 .
  • FIG. 22 is a schematic diagram showing the structure of the surgical instrument in FIG. 1 after the tool assembly is removed.
  • FIG. 23 is a schematic exploded view of the tool assembly of FIG. 22 .
  • FIG. 24 is a schematic diagram showing the structure of the tool assembly, the working member and the engaging operating member in FIG. 22 .
  • FIG. 25 is a schematic diagram showing the structure of the tool assembly, the action member and the engagement operating member in FIG. 22 .
  • the present disclosure provides a surgical instrument 10, which can switch a tool assembly 20 provided thereon from an open state to a closed state, and can fire the tool assembly 20.
  • the surgical instrument 10 may include a housing 11, a trigger 12, an actuating mechanism 13, a fine-tuning mechanism 14, and a firing mechanism 15.
  • the tool assembly 20 includes a nail magazine 21 and a nail anvil 22.
  • the nails to be formed are stored in the nail magazine 21.
  • a knife for cutting tissue can also be stored in the nail magazine 21.
  • the tool assembly 20 can be arranged at the distal end of the surgical instrument 10.
  • the term “near” can be used to roughly indicate the end, side or part of an element (device, component or part) that is closer to the doctor; the term “far” can be used to roughly indicate the end, side or part of an element that is farther from the doctor.
  • the arrow X+ can be used to indicate the far side of the far-near direction, and the arrow X- can be used to indicate the near side of the far-near direction.
  • the housing 11 may define a handle 111 configured to be held by a doctor.
  • the housing 11 may be composed of a pair of half shells 11-1, 11-2.
  • the pair of half shells 11-1, 11-2 may be detachably assembled together to form a substantially closed interior space.
  • the trigger 12 is configured to be operated by a doctor and is configured to be displaced between its initial position and its final position.
  • the trigger 12 may be pivotally supported by the housing 11 so as to be able to move between its initial position and its final position.
  • the trigger 12 is located at an initial position with a large spacing from the handle 111.
  • the trigger 12 is located at a final position with a small spacing from the handle 111.
  • the initial position and the final position of a component are not necessarily two relative extreme positions within the movable range of the component.
  • the surgical instrument 10 may further include a reset member 121, which is configured to reset the trigger 12 to its initial position.
  • the reset member 121 may be a tension spring 121, one end of which may be connected to the trigger 12 and the other end of which may be connected to a boss disposed on the inner surface of the housing 11.
  • the actuating mechanism 13 is configured to cause the nail magazine 21 and the nail anvil 22 to move relative to each other under the drive of the trigger 12, so as to switch the tool assembly 20 from the first state to the second state, thereby shortening the distance between the nail magazine 21 and the nail anvil 22. That is, when the tool assembly 20 is in the first state, the distance between the nail magazine 21 and the nail anvil 22 is large; when the tool assembly 20 is in the second state, the distance between the nail magazine 21 and the nail anvil 22 is small.
  • the tool assembly 20 is in the first state, and the distance between the nail magazine 21 and the nail anvil 22 is D1.
  • the tool assembly 20 is in the second state, and the distance between the nail magazine 21 and the nail anvil 22 is D2, and D1 is greater than D2.
  • the fine-tuning mechanism 14 may include a fine-tuning operating member 141, and the fine-tuning operating member 141 is configured to be operated by a doctor.
  • the fine-tuning mechanism 14 may be configured such that when the tool assembly 20 is in the second state, as the fine-tuning operating member 141 is operated, the fine-tuning mechanism 14 fine-adjusts the distance between the nail magazine 21 and the nail anvil 22 to further shorten the distance between the nail magazine 21 and the nail anvil 22.
  • the fine-tuning mechanism 14 will gradually (or continuously) shorten the distance between the nail magazine 21 and the nail anvil 22, so that the distance between the nail magazine 21 and the nail anvil is adapted to the thickness of the tissue to be treated.
  • the state of the tool assembly 20 after adjustment by the fine-tuning mechanism 14 is referred to as the third state hereinafter. That is, the fine-tuning mechanism 14 can switch the tool assembly 20 from the second state to the third state by fine-tuning the distance between the nail magazine 21 and the nail anvil 22, so that the distance between the nail magazine 21 and the nail anvil 22 after fine-tuning is adapted to the thickness of the tissue to be treated. That is to say, the third state of the tool assembly 20 is not a specific state, but a state when the distance between the nail magazine 21 and the nail anvil 22 is adapted to the thickness of the tissue to be treated. In other words, the third state of the tool assembly 20 is determined according to the thickness of the tissue to be treated. In FIG. 3 , the tool assembly 20 is in the third state, wherein the distance between the nail magazine 21 and the nail anvil 22 is D3, and D2 is greater than D3.
  • the first state of the tool assembly 20 may be an open state
  • the second state of the tool assembly 20 may be a pre-closed state
  • the third state of the tool assembly 20 may be a closed state
  • the spacing between the nail magazine 21 and the nail anvil 22 is not equal to zero.
  • the doctor can determine the spacing that matches the thickness of the tissue to be treated based on clinical experience.
  • the spacing should not be too large to ensure that the tissue does not accidentally come out from between the nail magazine 21 and the nail anvil 22, and the spacing should not be too small to ensure that the tissue is not damaged due to excessive squeezing by the nail magazine 21 and the nail anvil 22.
  • the spacing should be set to a spacing at which the nails can be well formed and the tissue can be well nailed.
  • the spacing should also ensure that the knife can effectively cut the tissue.
  • the doctor can switch the tool assembly 20 from the open state to the pre-closed state by operating the trigger 12, so as to significantly shorten the distance between the nail magazine 21 and the nail anvil 22. Then, the doctor can fine-tune the distance between the nail magazine 21 and the nail anvil 22 by operating the fine-adjusting operating member 141, so as to gradually (or continuously) shorten the distance between the nail magazine 21 and the nail anvil 22 to match the thickness of the tissue to be treated, and then switch the tool assembly 20 to the closed state.
  • the surgical instrument 10 can be preferably applied to tissues of different thicknesses, and the tool assembly 20 can be switched from the open state to the closed state more quickly and conveniently.
  • the surgical instrument 10 may not include the fine adjustment mechanism 14.
  • the actuating mechanism 13 may directly (or in other words, in one step) switch the tool assembly 20 from the open state to the closed state.
  • the first state of the tool assembly 20 is the open state
  • the second state of the tool assembly 20 is the closed state.
  • the firing mechanism 12 is configured to cause the tool assembly 20 to fire.
  • the nail is pushed out of the nail magazine 22 and formed under the guidance of the nail anvil 22, thereby nailing the tissue.
  • a cutter is provided in the nail magazine 21
  • the firing mechanism 15 can be driven by the trigger 12. That is, the actuating mechanism 13 and the firing mechanism 15 can be driven by the same trigger 12.
  • the surgical instrument 10 may include two triggers 12, and the two triggers 12 can be used to drive the actuating mechanism 13 and the firing mechanism 15, respectively.
  • the overall structure of the surgical instrument 10 is described above by way of example.
  • the structures of different components of the surgical instrument 10 are described below by way of example.
  • the actuating mechanism 13 may include a bracket 131, which can be driven by the trigger 12 to move in the proximal direction.
  • the bracket 131 may be movably supported by the housing 11 so as to be movable relative to the housing 11 in the distal-proximal direction.
  • the nail magazine 21 may be fixed to the housing 11, the nail anvil 22 may be fixed to the bracket 131, and the nail anvil 22 may be located at the distal side of the nail magazine 21 and opposite to the nail magazine 21.
  • the bracket 131 moves in the proximal direction from its first position (i.e., the position in FIG. 2 ) to its second position (i.e., the position in FIG. 3 ) under the drive of the trigger 12, the anvil 22 will follow the bracket 131 to move in the proximal direction, so that the distance between the nail magazine 21 and the anvil 22 will be shortened, and then the tool assembly 20 will switch from the first state to the second state.
  • the nail magazine 21 can be fixed to the bracket 131, the nail anvil 22 can be fixed to the housing 111, and the nail magazine 21 can be located at the distal side of the nail anvil 22. This method can also shorten the distance between the nail magazine 21 and the nail anvil 22 by moving the bracket 131 in the proximal direction.
  • an element when an element is supported by another element, it may mean that the former is directly supported by the latter, or it may mean that the former is indirectly supported by the latter, that is, the former is supported by an intermediate element, and the intermediate element is supported by the latter.
  • the element when an element is described as movable and the context does not clearly indicate with respect to which object it can move, it can be considered that the element is movable relative to the housing 11.
  • the bracket 131 may include a frame portion 1311 and a slender portion 1312.
  • the slender portion 1312 may extend in the distal-proximal direction, and the frame portion 1311 may be located at the distal end of the slender portion 1312.
  • the frame portion 1311 may be at least partially exposed outside the housing 11, and be located on the distal side of the distal end of the housing 11.
  • One of the nail magazine 21 and the nail anvil 22 may be fixed on the frame portion 1311, and the other may be fixed at the distal end of the housing 11.
  • the frame portion 1311 may be roughly rectangular, and both the nail magazine 21 and the nail anvil 22 may be located on the inner side of the frame portion 1311.
  • the diameter of the arc where the frame portion 1311 is located is not greater than 36 mm to ensure that it is suitable for most When human tissues are anastomosed, it can be ensured that the tissues after anastomosis are more in line with the shape of the natural cavity.
  • the present disclosure does not specifically limit the manner in which the trigger 12 drives the bracket 131.
  • the trigger 12 can directly push the bracket 131 in the proximal direction.
  • the trigger 12 can indirectly drive the bracket 131 to move proximally through a transmission mechanism.
  • the transmission mechanism can be, but is not limited to, a combination of one or more selected from a connecting rod transmission mechanism, a gear transmission mechanism, a chain transmission mechanism, and a belt transmission mechanism.
  • the actuating mechanism 13 may further include a moving member 132, a fixed pulley 133, and a flexible member 134.
  • the moving member 132 can move in the distal direction under the push of the trigger 12.
  • the two ends of the flexible member 134 are respectively connected to the moving member 132 and the bracket 131, and the flexible member 134 is wound around the fixed pulley 133 to change the pulling direction of the flexible member 134.
  • the flexible member 134 will pull the bracket 131 to move in the proximal direction, thereby being able to switch the tool assembly 20 from the first state to the second state.
  • This implementation method is helpful to simplify the structure of the actuating mechanism 13 and reduce the number of components of the actuating mechanism 13 , thereby helping to reduce the overall size, overall weight and manufacturing cost of the surgical instrument 10 , and helping to improve the reliability of the surgical instrument 10 .
  • the flexible member 134 may be a steel wire rope.
  • the moving member 132 may be sleeved on the elongated portion 1312 to be supported by the elongated portion 1312 and may slide along the extension direction (i.e., the distal-proximal direction) of the elongated portion 1312. This configuration is conducive to simplifying the structure of the surgical instrument 10 and reducing the number of components of the surgical instrument 10.
  • the actuating mechanism 13 may further include a force-applying member 135 (i.e., a second force-applying member), which is configured to apply force to the moving member 132 in the distal direction.
  • a force-applying member 135 i.e., a second force-applying member
  • the flexible member 134 connected to the moving member 132 will remain tensioned, which helps to prevent the flexible member 134 from accidentally falling off the pulley 133.
  • the force applied by the force-applying member 135 on the moving member 132 will make the doctor's operation more labor-saving.
  • the force applying member 135 may be a tension spring 135.
  • One end of the tension spring 135 may be connected to the moving member 132, and the other end of the tension spring 135 may be connected to a protruding column provided on the inner surface of the housing 11.
  • the actuating mechanism 13 may further include a force applying member 136 (i.e., a third force applying member) and a blocking member 137.
  • the force applying member 136 is configured to apply force in the distal direction to the bracket 131.
  • the blocking member 137 is configured to block the movement of the moving member 132 in the proximal direction after the bracket 131 reaches its second position, so as to keep the bracket 131 in its second position.
  • the bracket 131 overcomes the force applied by the force applying member 136 and moves in the proximal direction. After the bracket 131 reaches its second position, the blocking member 137 blocks the moving member 132 to prevent the moving member 132 from moving in the proximal direction under the force applied by the force applying member 136, thereby releasably restricting the bracket 131 from returning from its second position to its first position.
  • the tool assembly 20 after the tool assembly 20 is switched from the first state to the second state, even if the doctor releases the trigger 12, the tool assembly 20 will remain in the second state, which provides convenience and conditions for the doctor to perform subsequent operations.
  • the doctor can operate the blocking member 137 to release the moving member 132. After being released, the moving member 132 will move in the proximal direction under the force applied by the force applying member 136, thereby driving the bracket 131 to return to its first position, thereby causing the tool assembly 20 to switch to the first state to release the tissue between the nail magazine 21 and the nail anvil 22. It can be seen that through the force applying member 136 and the blocking member 137, the operation of closing and opening the tool assembly 20 will be more convenient and reliable.
  • the blocking member 137 may include an operating portion 1371, a blocking portion 1372 and a connecting portion 1373.
  • the operating portion 1371 is configured to be operated by a doctor.
  • the blocking portion 1372 is configured to block the movement of the moving member 132 in the proximal direction (when the bracket 131 is in its second position).
  • the blocking portion 1372 and the operating portion 1371 are pivotally supported (for example, supported by the housing 11) around a pair of substantially parallel pivot axes a1, a2, respectively.
  • the connecting portion 1373 extends between the operating portion 1371 and the blocking portion 1372 and is integrally formed with the two, and is configured to deform when the operating portion 1371 is rotated, causing the blocking portion 1372 to rotate to release the moving member 132.
  • this implementation only one component (i.e., the blocking member 137) is able to releasably block the proximal movement of the moving member 132. Therefore, this implementation is conducive to reducing the number of components of the surgical instrument 10, thereby helping to reduce the overall size, overall weight and manufacturing cost of the surgical instrument 10, and helping to improve the reliability of the surgical instrument 10.
  • the blocking member 137 there are many ways to implement the blocking member 137, and it is not limited to the above.
  • the blocking member can also be implemented as a combination of a spring and a latch finger.
  • the present disclosure does not specifically provide a structure of the moving member 132.
  • the proximal end of the moving member 132 is provided with a pair of gradually expanding surfaces 1321, which are arranged at intervals in the width direction and are configured such that the spacing between the two gradually increases as they extend in the proximal direction.
  • the pair of gradually expanding surfaces 1321 can guide the trigger 12 so that the trigger 12 is better aligned with the moving member 132.
  • the moving member 132 may include two parts 1322 and 1323, and the two parts 1322 and 1323 may be detachably assembled together to form the moving member 132.
  • the two parts 1322 and 1323 may be detachably assembled together by means of a plug post 1324 and a plug hole 1325 respectively disposed on the two parts.
  • the two parts 1322 and 1323 may jointly define a through hole 1326 for the elongated portion 1312 of the bracket 131 to pass through, so as to facilitate the moving member 132 to be sleeved on the elongated portion 1312 of the bracket 131.
  • the width direction may refer to a direction orthogonal to the far-near direction.
  • Y+ may be used to indicate one side in the width direction
  • arrow X- may be used to indicate the other side in the width direction.
  • actuating mechanism The above is an example of the actuating mechanism. It is understandable that there are many ways to implement the actuating mechanism, which are not limited to the above. The present disclosure does not impose any specific restrictions on the structure of the actuating mechanism, as long as the distance between the nail magazine and the nail anvil can be shortened under the drive of the trigger.
  • the moving member can drive the bracket through other transmission mechanisms.
  • the transmission mechanism only needs to be able to convert the distal movement of the moving member into the proximal movement of the bracket.
  • the transmission mechanism may include a pair of racks respectively fixed to the bracket and the moving member, and a gear between the pair of racks and meshing with the two racks.
  • the actuating mechanism may not include a bracket, and the moving member may directly drive one or both of the nail magazine and the anvil, or the moving member may drive one or both of the nail magazine and the anvil through other transmission mechanisms to shorten the distance between the two, thereby switching the tool assembly from the first state to the second state.
  • the fine-tuning mechanism 14 can fine-tune the distance between the nail magazine 21 and the nail anvil 22 by driving the bracket 131 to move further in the proximal direction. That is, the fine-tune mechanism 14 can be constructed such that when the bracket 131 reaches the second position, the fine-tune mechanism 14 drives the bracket 131 to move in the proximal direction to fine-tune the distance between the nail anvil 22 and the nail magazine 21.
  • the fine-tune mechanism 14 uses the bracket 131 of the actuating mechanism 13 to realize the transmission between it and the tool assembly 20, which is conducive to reducing the number of components of the surgical instrument 10, thereby helping to reduce the overall size, overall weight and manufacturing cost of the surgical instrument 10, and helping to improve the reliability of the surgical instrument 10.
  • the fine-tuning mechanism 14 may not use components of the actuating mechanism 13, but may drive one or both of the nail magazine 21 and the nail anvil 22 through other transmission mechanisms, thereby achieving fine-tuning of the distance between the two.
  • the bracket 131 may include a screw-on portion 1313, and the fine-tuning mechanism 14 may further include a fine-tuning member 142.
  • the fine-tuning operating member 141 is configured to drive the fine-tuning member 142 to rotate when operated.
  • the fine-tuning member 142 is configured to be screwed with the screw-on portion 1313, so that as the fine-tuning member 142 is rotated, the fine-tuning member 142 drives the bracket 12 to move in the proximal direction.
  • the screw-on portion 1313 may be provided with an external thread, and the fine-tuning member 142 may be provided with an internal thread. In other examples, the screw-on portion 1313 may be provided with an internal thread, and the fine-tuning member 142 may be provided with an external thread.
  • this implementation has many advantages.
  • this implementation has a large deceleration transmission ratio, which can ensure a high adjustment accuracy.
  • the bracket 131 will only move a small distance in the proximal direction, which allows the doctor to accurately and smoothly fine-tune the spacing between the nail magazine 21 and the nail anvil 22.
  • the bracket 131 after the bracket 131 is driven by the fine-tuning member 142 to move in the proximal direction, even if the doctor releases the fine-tuning operating member 141, the bracket 131 will not be separated from the fine-tuning member 142 and accidentally return to its second position. Therefore, this implementation has a higher safety.
  • this implementation has a large deceleration transmission ratio, the operation of rotating the fine-tuning operating member 141 is more labor-saving.
  • the fine-tuning operating member 141 and the fine-tuning member 142 are two independent components, in other examples, the fine-tuning operating member 141 and the fine-tuning member 142 may also be two parts of a component, or in other words, the fine-tuning operating member 141 and the fine-tuning member 142 may be formed as one piece.
  • the manner in which the fine-tuning mechanism 14 drives the bracket 131 is not limited to the above.
  • the fine-tuning mechanism 14 may include a ratchet and a pawl, and the bracket 131 may be provided with a rack portion meshed with the ratchet, so that the bracket 131 can be locked and driven to move in the proximal direction by rotating the ratchet.
  • the fine-tuning mechanism 14 may include a worm wheel and a worm, and the bracket 131 may be provided with a rack portion meshed with the worm wheel, so that the worm wheel can be driven by rotating the worm and the rack can be driven by the worm wheel, thereby achieving lockable driving of the bracket 131 to move in the proximal direction.
  • the fine-tuning mechanism 14 can drive the bracket 131 to move in the proximal direction by driving the moving member 132 to move in the distal direction.
  • the fine-tuning operating member 141 is provided with a accommodating space 1411, and the fine-tuning member 142 is accommodated in the accommodating space 1411.
  • the fine-tuning member 142 is configured to be movable relative to the fine-tuning operating member 141 in the far-near direction, and is configured to rotate with the fine-tuning operating member 141.
  • the fine-tuning member 142 is located on the proximal side of the screw-fitting portion 1313, so that when the bracket 131 is located in its first position, the fine-tuning member 142 is spaced apart from the screw-fitting portion 1313 (as shown in Figure 2), and when the bracket 131 is located in its second position, the fine-tuning member 142 is abutted against the screw-fitting portion 1313 (as shown in Figure 3).
  • the screw-fitting portion 1313 can be located at the proximal end of the bracket 131.
  • the fine-tuning mechanism 14 can also include a force applying member 143 (i.e., a first force applying member).
  • the force applying member 143 applies force to the fine-tuning member 142 in the distal direction, so that when the bracket 131 is located at its second position, the force applying member 143 presses the fine-tuning member 142 against the screw-engaging portion 1313.
  • rotating the fine-tuning operating member 141 can cause the fine-tuning member 142 to be screwed with the screw-engaging portion 1313.
  • the fine-tuning operating member 141 is also provided with an exposure hole 1412 extending from the accommodating space 1411 to the proximal surface of the fine-tuning operating member 141.
  • the fine-tuning mechanism 14 also includes an indicator 144, and the indicator 144 includes a flange portion 1441 located on its outer periphery.
  • the force-applying member 143 can be an elastic member 143.
  • the elastic member 143 is located on the proximal side of the fine-tuning member 142, and the flange portion 1441 is located between the fine-tuning member 142 and the elastic member 143.
  • the bracket 131 presses against the indicator 144, so that a portion of the indicator 144 extends out of the fine-tuning operating member 141 through the exposure hole 1412 to indicate the distance between the anvil 22 and the nail magazine 21.
  • the doctor can determine that the tool assembly 20 is currently in the first state.
  • the screwing portion 1313 presses against the fine-tuning member 142, so that the elastic member 143 is compressed and the indicator member 144 partially extends out of the exposure hole 1412. Accordingly, the doctor can determine that the tool assembly 20 has been switched to the second state.
  • the fine-tuning operating member 141 As the fine-tuning operating member 141 is rotated, the fine-tuning member 142 and the screw-engaging portion 1313 begin to be screwed together, so that the fine-tuning member 142 gradually moves toward the distal direction, and then the indicator member 144 moves toward the distal direction under the pressure of the elastic member 143, and the size of the exposed portion of the indicator member 144 gradually decreases.
  • the bracket 131 does not move toward the proximal direction. Therefore, in this process, the doctor can rotate the fine-tuning operating member 141 relatively quickly to make the fine-tuning mechanism 14 quickly complete the idle stroke.
  • the fine-tuning member 142 reaches the limit position in the distal direction, as the fine-tuning operating member 141 continues to rotate, the fine-tuning member 142 no longer moves in the distal direction, and the indicator member 144 no longer moves in the distal direction, and the indicator member 144 begins to gradually move in the proximal direction under the pressure of the screw-fitting portion 1313.
  • the size of the exposed portion of the indicator member 144 no longer continues to decrease, but begins to gradually increase. Based on this, the doctor can judge that the bracket 131 has begun to move in the proximal direction, and the distance between the nail magazine 21 and the nail anvil 22 has begun to decrease.
  • the doctor can slow down the speed of rotating the fine-tuning operating member 141 to accurately adjust the distance between the nail magazine 21 and the nail anvil 22, and judge the distance between the nail magazine 21 and the nail anvil 22 according to the size of the exposed portion of the indicator member 144.
  • the indicator 144 can help the doctor to relatively accurately judge the state of the tool assembly 20 and the spacing between the nail cartridge and the nail anvil.
  • the fine-tuning operating member 141 can be rotatably supported by the housing 11.
  • the fine-tuning operating member 141 can be composed of two parts 1413, 1414, namely a first part 1413 and a second part 1414.
  • the two parts 1413, 1414 are detachably assembled together to form the fine-tuning operating member 141.
  • the accommodating space 1411 can be jointly defined by the two parts 1413, 1414, so that when the two parts 1413, 1414 are disassembled, the accommodating space 1411 is open.
  • the fine-tuning member 142, the force applying member 143 and the indicating member 144 can be placed in the accommodating space 1411 more conveniently.
  • the second part 1414 includes a pair of shoulders 1415, 1416 arranged at intervals and a shaft neck 1417 located therebetween.
  • a pair of half shells 11-1, 11-2 jointly define an axial hole 116.
  • the firing mechanism 15 may include a pusher 151, a force applying member 152 and an action member 153.
  • the pusher 151 is located outside the moving member 132 in the width direction, and the pusher 151 is movable in the far-near direction.
  • the force applying member 152 is configured to apply force to the pusher 151 toward the inner side in the width direction.
  • the pusher 151 is located on the proximal side of the action member 153 and abuts against the proximal end of the action member 153.
  • the action member 153 has an elongated structure, which extends from the pusher 151 to the tool assembly 20.
  • the outer side when describing the positional relationship between the moving member 132, the pushing member 151, the force applying member 152 and the trigger 12, the outer side may refer to the Y- side shown in the figure, and the inner side may refer to the Y+ side shown in the figure.
  • inside and outside can also be relative to the central axis of the surgical instrument 10, or in other words, “inside” and “outside” can be based on the central axis of the surgical instrument 10 as a reference, and the central axis can be defined by the slender portion 1312 of the bracket 13.
  • “Inward” can refer to the central axis
  • “outward” can refer to the direction away from the central axis.
  • the moving member 132 when the moving member 132 is in its first position, that is, when the tool assembly 20 is in the first state, the moving member 132 supports the pushing member 151 , so that the pushing member 151 overcomes the force applied by the force applying member 152 and remains outside the moving path of the trigger 12 .
  • the trigger 12 when the trigger 12 is operated for the first time, the trigger 12 pushes the moving member 132, so that the moving member 132 moves from its first position to its second position in the distal direction, and then the tool assembly 20 switches from the first state to the second state.
  • the moving member 132 and the trigger 12 sequentially support the pushing member 151, so that the pushing member 151 overcomes the applied force of the force applying member 152 and remains outside the moving path of the trigger 12, so as to prevent the pushing member 151 from being pushed in the distal direction by the trigger 12.
  • the moving member 132 stays at its second position, and the trigger 12 returns to its initial position under the drive of the reset member 121. At this time, the moving member 132 and the trigger 12 will no longer support the pushing member 151, and the force member 152 pushes the pushing member 151 into the moving path of the trigger 12. For example, at this time, the pushing member 151 can move inward in the width direction under the force applied by the force member 152 until it abuts against the bracket 131 (the elongated portion 1312).
  • the pusher 151 and the force-applying member 152 it is realized that one trigger 12 is used to sequentially drive the actuating mechanism 13 and the firing mechanism 15. Compared with using two triggers 12 to drive the actuating mechanism 13 and the firing mechanism 15 respectively, the above implementation can reduce the number of components of the surgical instrument 10, thereby helping to reduce the overall size, overall weight and manufacturing cost of the surgical instrument 10, and helping to improve the reliability of the surgical instrument 10.
  • the moving member 132 has an outer side surface 1327 for supporting the push member 151
  • the trigger 12 has an outer side surface 122 for supporting the push member 151.
  • the outer side surface 1327 of the moving member 132 may be substantially flush with the outer side surface 122 of the trigger 12 (for example, the distance between the two is Alternatively, the outer side 1327 of the moving member 132 may protrude beyond the outer side 122 of the trigger 12. In this way, when the moving member 132 moves from its first position to its second position under the drive of the trigger 12, the pushing member 151 can smoothly transition from being supported by the moving member 132 to being supported by the trigger 12, so as to ensure that the trigger 12 will not push the pushing member 151 in the distal direction.
  • the pusher 151 may be provided with a leg 1511, and the surgical instrument 10 may further include a guide member 112.
  • the guide member 112 is configured such that during the movement of the pusher 151 in the proximal direction (i.e., during the resetting process after firing), the guide member 112 cooperates with the leg 1511 to guide the pusher 151 to deviate outward in the width direction and leave the motion path of the trigger 12 and prevent the pusher 151 from entering the motion path of the trigger 12 again.
  • the tool assembly 20 is fired, it is usually not desired that the tool assembly 20 is accidentally fired again. For example, if the tool assembly 20 is accidentally fired again, the tool assembly 20 may cause unexpected harm to the patient. For example, the cutter may be pushed out again and cut the tissue.
  • the pusher 151 will leave the movement path of the trigger 12 through the cooperation of the legs 1511 and the guide member 112. After the firing mechanism 15 is reset, the cooperation of the legs 1511 and the guide member 112 will prevent the pusher 151 from entering the movement path of the trigger 12 again. In this way, after the firing is completed, even if the doctor accidentally operates the trigger 12 again, the tool assembly 20 will not be accidentally fired again.
  • the leg 1511 may include a guide portion 1512 configured to gradually incline toward the outside in the width direction as extending toward the proximal direction.
  • the guide portion 1512 As shown in Fig. 18, during the process of the push member 151 moving in the distal direction, when the guide portion 1512 meets the guide member 112, the distal end of the guide portion 1512 is closer to the inner side than the proximal end of the guide member 112. In this way, as the push member 151 continues to move in the distal direction, the guide member 112 will guide the push member 151 to deviate inwardly, so that the guide portion 1512 bypasses the guide member 112 on the inner side of the guide member 112, thereby allowing the push member 151 to move in the distal direction under the drive of the trigger 12 to fire the tool assembly 20.
  • the guide portion 1512 As shown in Fig. 19, during the movement of the push member 151 in the proximal direction, when the guide portion 1512 meets the guide member 112, the proximal end of the guide portion 1512 is further outward than the distal end of the guide member 112. In this way, as the push member 151 continues to move in the proximal direction, the guide member 112 guides the push member 151 to deviate outward, so that the guide portion 1512 bypasses the guide member 112 on the outside of the guide member 112, thereby causing the push member 151 to deviate outward in the width direction to leave the moving path of the trigger 12.
  • the leg 1511 will allow the push member 151 to move in the distal direction under the push of the trigger 12 to fire the tool assembly 20, and can guide the push member 151 to deviate to the outside in the width direction and leave the movement path of the trigger 12 during the process of the push member 151 moving in the proximal direction after firing.
  • the leg 1511 may further include a retaining portion 1513, which is located at the distal end of the guide portion 1512 and is configured to abut against the guide member 112 to prevent the push member 151 from entering the motion path of the trigger 12.
  • a retaining portion 1513 which is located at the distal end of the guide portion 1512 and is configured to abut against the guide member 112 to prevent the push member 151 from entering the motion path of the trigger 12.
  • the retaining portion 1513 will abut against the guide member 112, thereby preventing the push member 151 from entering the motion path of the trigger 12 again.
  • the present disclosure does not specifically limit the configuration of the retaining portion 1513, as long as the retaining portion 1513 can abut against the guide member 112 to prevent the push member 151 from entering the motion path of the trigger 12 again.
  • the retaining portion 1513 may be configured to be substantially parallel to the far-near direction so that it can abut against the guide member 112 more stably.
  • the guide member 112 has a guide surface 1121 located outside thereof.
  • the guide surface 1121 is configured to cooperate with the leg 1511. Specifically, during the movement of the push member 151 in the proximal direction, the guide surface 1121 cooperates with the guide portion 1512 to guide the push member 151 to deviate outward in the width direction; when the push member 151 moves to its extreme position in the proximal direction, the proximal end of the guide surface 1121 abuts against the retaining portion 1513 to prevent the push member 151 from entering the movement path of the trigger 12.
  • the guide surface 1121 can be configured to gradually tilt outward in the width direction as it extends in the proximal direction. This configuration of the guide surface 1121 is conducive to increasing the distance that the push member 151 deviates outward in the width direction under the guidance of the guide member 112.
  • the inner side 1122 of the guide member 112 can be constructed to be roughly parallel to the far-near direction. In the process of the pusher 151 moving in the far-side direction, the inner side 1122 of the guide member 112 contacts the leg 1511 (the guide portion 1512). Since the inner side 1122 of the guide member 112 is constructed to be roughly parallel to the far-near direction, it will not or less cause the pusher 151 to deviate inwardly in the width direction. Therefore, this structure of the inner side 1122 of the guide member 112 is conducive to reducing the distance of the pusher 151 deviating inwardly in the width direction under the guidance of the guide member 112. If the pusher 151 deviates too much inwardly in the width direction, it may be squeezed with other components (such as the elongated portion 1312 of the bracket 131) to cause the leg 1511 to be damaged.
  • other components such as the elongated portion 1312 of the bracket 13
  • the guide member 112 can be a protrusion formed on the inner surface of the housing 11.
  • the guide member 112 can also be an independent component installed on the housing 11.
  • a guide groove 113 may be provided on the inner surface of the housing 11, and the guide groove 113 extends in the far-near direction.
  • the pusher 151 is placed in the guide groove 113 to move in the far-near direction under the guidance of the guide groove 113.
  • two end surfaces 1131 of the guide groove 113 in the far-near direction may respectively define two extreme positions of the pusher 151 in the far-near direction.
  • the pusher 151 may include two legs 1511, and the two legs 1511 may be located at two sides of the pusher 151 in the height direction.
  • the actuating mechanism 13 includes two guide members 112, and the two guide members 112 are respectively arranged on two side walls 1132 of the guide groove 113 in the height direction to respectively cooperate with the two guide members 112.
  • the height direction may refer to a direction orthogonal to both the far-near direction and the width direction.
  • arrow Z+ may be used to indicate one side in the height direction
  • arrow Z- may be used to indicate the other side in the height direction.
  • the guide groove 113 may include a first section groove and a second section groove sequentially arranged in the distal direction, and the bottom surface 1134 of the second section groove protrudes inwardly beyond the bottom surface 1133 of the first section groove.
  • the bottom surface 1134 of the second section groove protrudes toward the pusher 151 beyond the bottom surface 1133 of the first section groove.
  • the first section groove can provide an escape space for the proximal end of the pusher 151 to allow the pusher 151 to be located outside the moving path of the trigger 12.
  • the thickness of the housing 11 is thinner only at the first section groove, which is conducive to ensuring that the housing 11 has sufficient strength.
  • the guide groove 113 further includes a third groove section located between the first groove section and the second end groove, and the bottom surface 1135 of the third groove section is configured as a slope surface 1135 extending from the bottom surface 1133 of the first groove section to the bottom surface 1134 of the second groove section.
  • the slope surface 1135 helps to reduce the risk of the pusher 151 and the force-applying member 152 being stuck.
  • the push member 151 is provided with a seating groove 1514 on its outer side.
  • the force-applying member 152 is constructed as a spring sheet 152. Both ends of the spring sheet 152 are placed in the seating groove 1514 to follow the push member 151 to move in the far-near direction.
  • the middle part of the spring sheet 152 bulges toward its outer side to form a smooth arc-shaped outer side surface 1521, and the outer side surface 1521 abuts against the inner surface of the shell 11.
  • the pusher 151 is further provided with a protrusion 1515, which is located at the proximal end of the pusher 151 and protrudes toward the inner side of the pusher 151 in the width direction.
  • the pusher 151 is configured to be supported by the moving member 132 and the trigger 12 through the protrusion 1515.
  • the protrusion 1515 abuts against the outer surface 1327 of the moving member 132, so that the pusher 151 is supported by the moving member 132; in the process of the moving member 132 moving from its first position to its second position, the protrusion 1515 abuts against the outer surface 1327 of the moving member 132 and the outer surface 122 of the trigger 12 in turn, so that the pusher 151 is supported by the moving member 132 and the trigger 12 in turn.
  • the thickness of the proximal end of the pusher 151 will be larger, that is, the width of the proximal end surface 1516 of the pusher 151 is larger.
  • the contact area of the pusher 151 and the trigger 12 will be larger, which is conducive to improving the stability of the process of pushing, and ensuring that the combination of the pusher 151 and the trigger 12 in the pushing process is sufficiently stable and reliable.
  • the contact area of the pusher 151 and the moving member 132 or the trigger 12 is small (only the inner side of the protrusion 1515 contacts them), which is conducive to reducing the friction force when the moving member 132 or the trigger 12 moves relative to the pusher 151, thereby making the process of driving the moving member 132 to move in the distal direction more labor-saving.
  • the firing mechanism 15 may further include a force applying member 154, which is configured to apply force to the action member 153 in the proximal direction.
  • a force applying member 154 which is configured to apply force to the action member 153 in the proximal direction.
  • the force applying member 154 may be a compression spring 154.
  • One end of the compression spring 154 may abut against the action member 153, and the other end may abut against the supporting structure of the housing 11.
  • the firing mechanism is described above by way of example. It should be understood that there are many ways to implement the firing mechanism, which are not limited to the above. The present disclosure does not impose any specific restrictions on the structure of the firing mechanism, as long as the tool assembly can be fired when the trigger is driven.
  • the firing mechanism may not include an action member, and a push member may extend from the trigger to the tool assembly to directly fire the tool assembly under the drive of the trigger, or the push member may be connected to the tool assembly through other components or mechanisms to indirectly fire the tool assembly under the drive of the trigger.
  • the firing mechanism may not include a pusher, and the trigger may directly drive the action member.
  • the surgical instrument may include two triggers, which may be used to drive the actuating mechanism and the firing mechanism, respectively.
  • the tool assembly 20 can be detachably mounted on the surgical instrument 10, so that the surgical instrument 10 can be used multiple times by replacing the tool assembly 20.
  • Fig. 21 shows the surgical instrument 10 after the tool assembly 20 is removed.
  • the tool assembly 20 can be constructed so that it cannot be removed from the surgical instrument 10 without destroying it, that is, the surgical instrument 10 can also be disposable.
  • the tool assembly 20 may include a nail magazine 21, a nail anvil 22, and a firing member 23.
  • the nail magazine 21 may store nails 24.
  • a knife 25 may be provided in the nail magazine 21. The knife 25 may be transmission-connected with the firing member 23 to follow the firing member 23 to move in the far-near direction.
  • the nail magazine 21 and the nail anvil 22 are confined to the distal end of the bracket and are in a stable state away from each other.
  • the nail magazine 21, the nail anvil 22 and the slide post 26 are together formed into a window, which is convenient for the tissue to enter the window space during surgery, convenient for the doctor to operate and adjust, and the surgical field provided by the window is easy to observe.
  • the firing member 23 can be connected to the action member 153 of the firing mechanism 15 in a transmission manner so as to move in the distal-proximal direction following the action member 153.
  • the firing member 23 moves in the distal direction under the push of the action member 153 and pushes the nail 24 and the cutter 25 out of the nail magazine 21, thereby firing the tool assembly 20.
  • the firing member 23 moves in the proximal direction under the drive of the action member 153 and drives the cutter 25 to return to the nail magazine 21 to prevent the cutter 25 from accidentally cutting the tissue.
  • the firing member 23 can be constructed to be detachably engaged with the action member 153 and transmission-connected with the action member 153 .
  • the action member 153 includes a snap-fit portion 1531 disposed at its distal end, and the firing member 23 includes a matching portion 231 adapted to the snap-fit portion 1531.
  • the snap-fit portion 1531 is configured to be detachably engaged with the matching portion 231, so that the firing member 23 moves following the action member 153 in the far-near direction.
  • the surgical instrument 10 may further include an engagement operating member 16 configured to be operated by a doctor.
  • the engagement operating member 16 includes a pressing portion 161 .
  • the pressing portion 161 presses the action member 153, so that the distal end of the action member 153 is offset to one side in the width direction (i.e., the Y-side) to avoid the firing member 23 moving in the proximal direction, thereby allowing the firing member 23 to move in the proximal direction to a target position where the matching portion 231 and the engaging portion 1531 can engage.
  • the distal end of the action member 153 is reset, so that the engaging portion 1531 engages with the matching portion 231 at the target position.
  • the pressing portion 161 presses the action member 153, so that the distal end of the action member 153 deviates to one side in the width direction and avoids the firing member 23, thereby separating the engaging portion 1531 from the matching portion 231. Then, the tool assembly 20 can be moved in the distal direction to be removed from the surgical instrument 10.
  • the tool assembly 20 can be conveniently and quickly installed on or removed from the surgical instrument 10.
  • the engagement member 16 may further include a stopper 162, and the staple cartridge 21 may further include a limiting portion 211.
  • the stopper 162 is configured to engage with the limiting portion 211 to prevent the staple cartridge 21 from being separated from the engagement member 16 by moving distally.
  • the pressing portion 161 presses the action member 153, so that the action member 153 is offset to avoid the firing member 23 moving in the proximal direction, and the stopper portion 162 is offset to avoid the nail magazine 21 moving in the proximal direction, thereby allowing the firing member 23 to move in the proximal direction to the target position where the matching portion 231 and the engaging portion 1531 can engage, and allowing the nail magazine 21 to move in the proximal direction to the position where the stopper portion 162 can engage with the limiting portion 211. Then, after the engagement operating member 16 is released, the distal end of the action member 153 is reset to enable the engaging portion 1531 to engage with the matching portion 231, and the stopper portion 162 is reset to engage with the limiting portion 211.
  • the distal end of the action member 153 is biased under the pressure of the pressing portion 161 to avoid the firing member 23, so that the engaging portion 1531 is separated from the matching portion 231, and the stopper portion 162 is biased to avoid the nail magazine 21, so that the stopper portion 162 is separated from the limiting portion 211. Then, the tool assembly 20 can be moved in the distal direction to be disassembled from the surgical instrument 10.
  • the action member 153 can be connected to the firing member 23 and the staple cartridge 21 can be connected to the engagement operating member 16 by operating the engagement operating member 16 only once.
  • the action member 153 and the firing member 23 can be separated and the staple cartridge 21 can be separated from the engagement operating member 16 by operating the engagement operating member 16 only once. It can be seen that, through this implementation, the tool assembly 20 can be more conveniently and quickly installed on or removed from the surgical instrument 10.
  • the engagement operating member 16 can be supported rotatably around the pivot axis a3.
  • the pressing portion 161 and the stop portion 162 can be respectively located on both sides of the pivot axis a3, so that when the engagement operating member 16 is operated to rotate around the pivot axis a3 (for example, rotate counterclockwise in Figures 24 and 25), the engaging portion 1531 and the stop portion 162 move away from each other (for example, the engaging portion 1531 moves toward the Y-side, while the stop portion 162 moves toward the Y+side).
  • the engaging portion 1531 and the stopper 162 are moved away from each other, which makes the space between the engaging portion 1531 and the stopper 162 wider, so that when installing, the nail magazine 21 and the firing member 23 can be moved to the target position more conveniently, and when disassembling, the nail magazine 21 and the firing member 23 can be moved away from the target position more conveniently. It can be seen that through this implementation, the tool assembly 20 can be installed on or removed from the surgical instrument 10 more conveniently and quickly.
  • the surgical instrument 10 may further include a compression spring 163, which is sleeved on the pressing portion 161.
  • the compression spring 163 is configured such that the length when not compressed is greater than the length of the pressing portion 161, so that when the engagement operating member 16 is not operated, the two ends of the compression spring 163 respectively press the action member 153 and the engagement operating member 16. According to this configuration, when the engagement operating member 16 is not operated, under the pressure of the compression spring 163, the engagement operating member 16 will be maintained at the limit position when not operated, so as to maintain good engagement between the stopper 162 and the limiting portion 211.
  • the engagement operating member 16 can be rotatably supported by the housing 11 around the pivot axis a3.
  • the housing 11 is provided with a shaft portion 114
  • the shaft portion 114 is provided with the pivot axis a3
  • the engagement operating member 16 includes a pivot portion 164
  • the pivot portion 164 is pivotably supported by the shaft portion 114.
  • the action member 153 may include two engaging portions 1531, and the two engaging portions 1531 are located at the distal end of the action member 153 and are respectively located on both sides of the action member 153 in the height direction.
  • Each engaging portion 1531 is a convex block 1531 protruding in the height direction.
  • the firing member 23 may be provided with two matching portions 231 corresponding to the two engaging portions 1531, respectively, and each matching portion 231 is constructed as a recessed portion 231 adapted to a corresponding engaging portion 1531.
  • This implementation method has many advantages such as simple structure, convenient disassembly, and reliable connection.
  • the present disclosure does not impose any specific restrictions on the structures of the stopper 162 and the limiting portion 211, as long as the two can be detachably connected.
  • the stopper 162 is configured as a block 162
  • the limiting portion 211 is configured as a slot 211 or a hole 211 adapted to the block 162.
  • This implementation has many advantages such as simple structure, convenient disassembly, and reliable connection.
  • the proximal end of the nail magazine 21 may be provided with an insertion portion 212
  • the distal end of the housing 11 may be provided with a receiving portion 115 adapted to the insertion portion 212
  • the receiving portion 115 may be constructed to allow the insertion portion 212 to be inserted to support the nail magazine 21 .
  • the receiving portion 115 will provide support in multiple directions (such as height and width) for the nail magazine 21.
  • the engagement of the stopper 162 and the limiting portion 211 can limit the movement of the nail magazine 21 in the distal-proximal direction. In this way, the nail magazine 21 can be fixed to the housing 11.
  • the engaging operating member 16 can be pressed to insert the nail magazine 21 into the receiving portion 115 in the proximal direction, and then the engaging operating member 16 can be released to fix the nail magazine 21 to the housing 11 and connect the firing member 23 with the action member 153.
  • the engaging operating member 16 can be pressed and the nail magazine 21 can be pulled in the distal direction, so that the nail magazine 21 can be disassembled from the housing 11 and the firing member 23 can be separated from the action member 153.
  • the tool assembly 20 may further include a slide post 26, which may be slidably inserted into a slideway (not shown) provided in the nail magazine 21.
  • the nail anvil 22 may be configured to be detachably fixed to the frame portion 1311 (e.g., by snapping) and face the nail magazine 21.
  • the tool assembly 20 can be placed between the frame portion 1311 and the distal end of the shell 11, and then the nail magazine 21 can be fixed to the shell 11. Then, the anvil 22 can be pulled in the distal direction to move the anvil 22 to the portion of the distal end of the shell 11 facing the frame portion 1311, and then the anvil 22 can be fixed to the frame portion 1311 to complete the installation of the tool assembly 20.
  • the engaging operating member 16 may be pressed first and the nail magazine 21 may be pulled in the distal direction to be disassembled from the housing 21 , and then the nail anvil 22 may be disassembled from the frame portion 1311 .
  • This implementation method has many advantages such as simple structure, easy disassembly and reliable connection.
  • first or second etc. may be used in the present disclosure to describe various elements (such as a first force applying member and a second force applying member), these elements are not defined by these terms, and these terms are only used to distinguish one element from another.

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  • Surgical Instruments (AREA)

Abstract

La présente divulgation concerne un dispositif chirurgical. Le dispositif chirurgical comprend un déclencheur, un mécanisme d'actionnement et un mécanisme de réglage fin. Le mécanisme d'actionnement est entraîné par le déclencheur pour commuter un ensemble outil d'un premier état à un second état, de façon à réduire la distance entre une cartouche d'agrafes et une enclume d'agrafe. Lorsque l'ensemble outil est dans le second état, le mécanisme de réglage fin règle finement la distance entre la cartouche d'agrafes et l'enclume d'agrafe lorsqu'un élément d'actionnement de réglage fin est actionné, de telle sorte que la distance entre la cartouche d'agrafes et l'enclume d'agrafe est davantage réduite. Au moyen du mécanisme d'actionnement et du mécanisme de réglage fin, le dispositif chirurgical peut être mieux adapté à des tissus ayant différentes épaisseurs et peut commuter relativement rapidement et facilement l'ensemble outil d'un état ouvert à un état fermé.
PCT/CN2024/080359 2023-03-10 2024-03-06 Dispositif chirurgical Pending WO2024188131A1 (fr)

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Application Number Priority Date Filing Date Title
CN202320456822.5U CN220025110U (zh) 2023-03-10 2023-03-10 手术器械
CN202320456822.5 2023-03-10
CN202310231715.7 2023-03-10
CN202310231715.7A CN118614975A (zh) 2023-03-10 2023-03-10 手术器械

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WO2024188131A1 true WO2024188131A1 (fr) 2024-09-19

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CN220025109U (zh) * 2023-03-10 2023-11-17 天臣国际医疗科技股份有限公司 手术器械
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US4527724A (en) * 1983-06-10 1985-07-09 Senmed, Inc. Disposable linear surgical stapling instrument
US20120080334A1 (en) * 2010-09-30 2012-04-05 Ethicon Endo-Surgery, Inc. Selectively orientable implantable fastener cartridge
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CN220158315U (zh) * 2023-03-10 2023-12-12 天臣国际医疗科技股份有限公司 手术器械和工具组件
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