Retreating device of surgical instrument and surgical instrument

Abstract

The invention relates to a surgical instrument and a rollback device thereof, the surgical instrument rollback device comprises a driving mechanism and a transmission mechanism, the transmission mechanism comprises a first transmission structure, a conversion transmission structure and a second transmission structure; the first transmission structure is configured to transmit driving force to an end execution assembly of the surgical instrument, and the second transmission structure is connected with the driving mechanism; the conversion transmission structure is connected with the first transmission structure, is configured at a first position to be connected with a second transmission structure and moves to a second position to be separated from the second transmission structure. According to the rollback device of the surgical instrument, under the condition that the working part of the tail end execution assembly cannot be rolled back due to the fact that the surgical instrument breaks down, the working part of the tail end execution assembly can be rolled back through external force, for example, the working part of the tail end execution assembly is rolled back to the initial position, the structure is simple and compact, space is saved, and use is convenient. Operation is convenient and reliability is high.

Description

Technical Field

[0001] At least one embodiment of this disclosure relates to a retraction device for a surgical instrument and a surgical instrument. Background Technology

[0002] When using electric surgical instruments such as electric staplers, if a circuit malfunctions and the motor cannot be controlled to retract the surgical components, such as the cutter, a manual forced retraction device is required to return the surgical components to their initial positions, such as the cutter, so that the stapler jaws can be opened and the tissue released.

[0003] Most current manual forced retraction devices use a wrench to separate the transmission rack and gear. This method not only requires high strength of the parts, but also makes it difficult for doctors to operate. Especially when the stapler is stuck in thick tissue, it is difficult to lift the wrench manually. In some cases, the wrench is broken, but the gear and rack still cannot be separated. Summary of the Invention

[0004] At least one embodiment of this disclosure provides a retraction device for a surgical instrument, the retraction device including a drive mechanism and a transmission mechanism, the transmission mechanism including a first transmission structure, a switching transmission structure and a second transmission structure; the first transmission structure is configured to transmit driving force to an end effector component of the surgical instrument, the second transmission structure is connected to the drive mechanism; the switching transmission structure is connected to the first transmission structure and is configured in a first position to connect with the second transmission structure and moved to a second position to separate from the second transmission structure.

[0005] For example, according to an embodiment of the present disclosure, a retraction device for a surgical instrument is provided, wherein the first transmission structure and the end effector are arranged along a first direction, and a second direction intersects the first direction; the conversion transmission structure has a first end that is away from the second transmission structure in the second direction, and the first end of the conversion transmission structure is configured to be detachably connected to a first external connector to drive the conversion transmission structure to move to the second position via the first external connector; in the state where the conversion transmission structure is in the second position, the first end of the conversion transmission structure is configured to be detachably connected to a second external connector to drive the conversion transmission structure to move via the second external connector to transmit a driving force to the end effector.

[0006] For example, according to an embodiment of the present disclosure, a retraction device for a surgical instrument is provided, wherein the first transmission structure and the end effector are arranged along a first direction, a second direction intersects the first direction, the conversion transmission structure extends along the second direction and is configured to be movable in the second direction, and the second transmission structure and the first transmission structure are arranged in the second direction.

[0007] For example, according to an embodiment of the present disclosure, a surgical instrument retraction device has a conversion transmission structure having a first connecting structure and a second connecting structure spaced apart in the second direction; when the conversion transmission structure is in the first position, the first connecting structure is connected to the first transmission structure, and the second connecting structure is connected to the second transmission structure; when the conversion transmission structure is in the second position, the first connecting structure remains connected to the first transmission structure, the second connecting structure is separated from the second transmission structure, and the second transmission structure is located within the interval between the first connecting structure and the second connecting structure.

[0008] For example, according to an embodiment of the present disclosure, a surgical instrument retraction device includes a first connecting structure comprising a first connecting key disposed on the surface of the conversion transmission structure, and a second connecting structure comprising a second connecting key disposed on the surface of the conversion transmission structure. The first connecting key and the second connecting key extend along the second direction and are spaced apart in the second direction.

[0009] For example, in a surgical instrument retraction device according to an embodiment of the present disclosure, the length of the first connecting key is greater than the length of the second connecting key.

[0010] For example, according to an embodiment of the present disclosure, a retraction device for a surgical instrument includes a first transmission structure comprising a first gear and a first rack, the first rack extending along a first direction, and a second transmission structure comprising a second gear. When the conversion transmission structure is in the first position, a connecting key on the inner surface of the first gear engages with the first connecting key, teeth on the outer surface of the first gear mesh with teeth on the first rack, and a connecting key on the inner surface of the second gear engages with the second connecting key. The driving mechanism is configured to drive the second gear to rotate about an axis along the second direction, thereby driving the first gear to rotate about an axis along the second direction, and thus driving the rack to move along the first direction. When the conversion transmission structure is in the first position, the first connecting key is connected to the first gear, and the second connecting key is connected to the second gear. When the conversion transmission structure is in the second position, the first connecting key remains connected to the first gear, the second connecting key is separated from the second gear, and the second gear is located within the interval between the first connecting key and the second connecting key.

[0011] For example, according to an embodiment of the present disclosure, a retraction device for a surgical instrument includes a conversion transmission structure comprising a pin and a sleeve, the sleeve being sleeved on the pin, and a first connecting structure and a second connecting structure located on the surface of the sleeve; the sleeve is configured to move from a first position to a second position; when the sleeve is in the first position, the sleeve is connected to the second transmission structure; a first end of the pin in the second direction away from the second transmission structure is configured to be detachably connected to a first external connector, the first external connector being configured to move along the second direction toward the second transmission structure to contact the first end of the sleeve in the second direction thereby applying pressure along the second direction toward the second transmission structure to the sleeve, the sleeve being configured to move along the second direction from the first position to the second position under the pressure; the first end of the sleeve includes a transmission connector, and when the sleeve is in the second position, the transmission connector is configured to be detachably connected to the second external connector to drive the sleeve to rotate about an axis in the second direction via the second external connector to drive the first transmission structure to move, thereby transmitting a driving force to the end effector assembly.

[0012] For example, according to an embodiment of the present disclosure, a retraction device for a surgical instrument includes a first end of a pin with a first thread, a first external connector with a second thread that matches the first thread, and the first external connector being configured to be driven to move along the first thread to drive the sleeve to the second position; the sleeve's transmission connector includes a nut, and the second external connector includes a nut sleeve that matches and connects with the nut.

[0013] For example, in a surgical instrument retraction device according to an embodiment of the present disclosure, the length of the first thread is configured such that when the first external connector moves to the end of the first thread near the second transmission structure, the sleeve just separates from the second transmission structure.

[0014] For example, according to an embodiment of the present disclosure, the first external connector includes a first interface and a release nut, the release nut being configured to connect the first interface to a first end of the pin, the release nut having the second thread; the second external connector includes a second interface, the second interface including the nut sleeve; the first interface and the second interface are two interfaces of the same wrench.

[0015] For example, in a surgical instrument retraction device according to an embodiment of the present disclosure, the conversion transmission structure is a columnar structure extending in a second direction, and the first end of the conversion transmission structure is configured to be connected to the first external connector and the second external connector, respectively.

[0016] For example, according to an embodiment of the present disclosure, the surgical instrument retraction device further includes a third transmission structure, through which the second transmission structure is connected to the drive mechanism.

[0017] For example, according to an embodiment of the present disclosure, a retraction device for a surgical instrument includes a second transmission structure comprising a second gear, a third transmission structure comprising a third gear, wherein the teeth on the outer surface of the second gear mesh with the teeth on the outer surface of the third gear; the drive mechanism includes a motor, the motor including a motor shaft; the motor shaft is connected to the third gear to drive the third gear to rotate.

[0018] For example, a retraction device for a surgical instrument provided in one embodiment of this disclosure further includes an elastic element, wherein the first transmission structure and the end effector are arranged along a first direction, and a second direction intersects the first direction, and the elastic element is configured to apply an elastic force to the switching transmission structure along the second direction away from the second transmission structure.

[0019] At least one embodiment of this disclosure also provides a surgical instrument, which includes a retraction device for any of the surgical instruments provided in this disclosure. Attached Figure Description

[0020] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings of the embodiments will be briefly described below. Obviously, the drawings described below only relate to some embodiments of the present invention and are not intended to limit the present invention.

[0021] Figure 1 This is a schematic diagram of the structure of a retraction device for a surgical instrument provided in at least one embodiment of the present disclosure. Figure 1 .

[0022] Figure 2 This is a schematic diagram of the structure of a retraction device for a surgical instrument provided in at least one embodiment of the present disclosure. Figure 2 .

[0023] Figure 3A This is a schematic diagram of the structure of a retraction device for a surgical instrument provided in at least one embodiment of the present disclosure.

[0024] Figure 3B yes Figure 3A The diagram shows a partially enlarged view of the first and second transmission structures.

[0025] Figure 4 This is a schematic diagram of the structure of a retraction device for a surgical instrument provided in at least one embodiment of the present disclosure. Figure 4 .

[0026] Figure 5A This is a schematic diagram of the structure of a retraction device for a surgical instrument provided in at least one embodiment of the present disclosure.

[0027] Figure 5B yes Figure 5A The diagram shows a partially enlarged view of the first and second transmission structures.

[0028] Figure 6 This is a schematic diagram of the sleeve of the conversion transmission structure of a surgical instrument retraction device according to an embodiment of this disclosure.

[0029] Figure 7 This is a schematic diagram of the pin of the conversion transmission structure of a surgical instrument retraction device according to an embodiment of this disclosure.

[0030] Figure 8 This is a schematic diagram of the first gear of a retraction device for a surgical instrument according to an embodiment of this disclosure.

[0031] Figure 9This is a schematic diagram of the first rack of a retraction device for a surgical instrument according to an embodiment of this disclosure.

[0032] Figure 10 This is a schematic diagram showing the disassembly of components of a retraction device for a surgical instrument according to an embodiment of this disclosure.

[0033] Figure 11 This is a schematic diagram of a first external connector and a second external connector for a retraction device for a surgical instrument according to an embodiment of this disclosure.

[0034] Figure 12 This is a schematic diagram of a release nut for a retraction device of a surgical instrument according to an embodiment of the present disclosure. Detailed Implementation

[0035] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the described embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0036] Unless otherwise defined, the technical or scientific terms used herein should have the ordinary meaning understood by one of ordinary skill in the art to which this invention pertains. The terms "first," "second," and similar terms used in this patent application specification and claims do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as "comprising" or "including" mean that the element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, without excluding other elements or objects. Terms such as "inner," "outer," "upper," and "lower" are used only to indicate relative positional relationships; these relative positional relationships may change accordingly when the absolute position of the described object changes.

[0037] As used in this disclosure, terms such as "vertical" and "substantially vertical" include a degree of error, taking into account measurement and errors associated with the measurement of a particular quantity (e.g., limitations of the measurement system), and indicate a range of acceptable deviations for a particular value as determined by one of ordinary skill in the art. For example, "substantially" can mean within one or more standard deviations, and unless otherwise specified, can mean within 10% or 5% of the deviation of said value.

[0038] The accompanying drawings in this disclosure are not drawn to scale, and the specific dimensions and quantity of each structure can be determined according to actual needs. The drawings described in this disclosure are only structural schematic diagrams.

[0039] In this disclosure, the first direction and the second direction refer to the direction along a certain straight line segment AB. Unless otherwise specified, the direction can be from endpoint A to B or from B to A.

[0040] The end of the surgical instrument containing the end effector is the distal end, and the end of the surgical instrument furthest from the end effector is the proximal end. In this disclosure, "proximal end" of a structure refers to the end of the structure closest to the proximal end of the surgical instrument, and "distal end" of a structure refers to the end of the structure furthest from the proximal end of the surgical instrument; "proximal side" of a structure refers to the side of the structure closest to the proximal end of the surgical instrument, and "distal side" of a structure refers to the side of the structure furthest from the proximal end of the surgical instrument.

[0041] At least one embodiment of this disclosure provides a retraction device for a surgical instrument. The retraction device includes a drive mechanism and a transmission mechanism. The transmission mechanism includes a first transmission structure, a conversion transmission structure, and a second transmission structure. The first transmission structure is configured to transmit driving force to the end effector component of the surgical instrument. The second transmission structure is connected to the drive mechanism. The conversion transmission structure is connected to the first transmission structure and is configured in a first position to connect with the second transmission structure and to move to a second position to separate from the second transmission structure. The retraction device for a surgical instrument provided by this disclosure allows for the retraction of the working part of the end effector component, for example, back to its initial position, by external force when the surgical instrument malfunctions and cannot retract. Furthermore, it has a simple and compact structure, saves space, is easy to operate, and has high reliability.

[0042] At least one embodiment of this disclosure also provides a surgical instrument, which includes a retraction device for any of the surgical instruments provided in this disclosure.

[0043] For example, Figure 1 This is a schematic diagram of the structure of a retraction device for a surgical instrument provided in at least one embodiment of the present disclosure. Figure 1 . Figure 2 This is a schematic diagram of the structure of a retraction device for a surgical instrument provided in at least one embodiment of the present disclosure. Figure 2 . Figure 3A This is a schematic diagram of the structure of a retraction device for a surgical instrument provided in at least one embodiment of the present disclosure. Figure 3B yes Figure 3A The diagram shows a partially enlarged view of the first and second transmission structures. Figure 2 It is to remove Figure 1 The diagram following the framework in the image. Figure 3A Includes pairs along line AA Figure 2The diagram shows a cross-section of the retraction device.

[0044] Figure 4 This is a schematic diagram of the structure of a retraction device for a surgical instrument provided in at least one embodiment of the present disclosure. Figure 4 . Figure 5A This is a schematic diagram of the structure of a retraction device for a surgical instrument provided in at least one embodiment of the present disclosure. Figure 5B yes Figure 5A The diagram shows a partially enlarged view of the first and second transmission structures.

[0045] Figures 1-3A The diagram shows the state in which the conversion transmission structure is connected to the first external connector 31 in the first position. Figures 4-5A This shows the state in which the conversion transmission structure is connected to the second external connector 32 in the second position.

[0046] refer to Figures 1-3A The surgical instrument retraction device provided in this embodiment includes a drive mechanism 1 and a transmission mechanism 2. The transmission mechanism 2 includes a first transmission structure 21, a conversion transmission structure 20, and a second transmission structure 22. The first transmission structure 21 is configured to transmit driving force to the end effector assembly of the surgical instrument. The second transmission structure 22 is connected to the drive mechanism 1. The conversion transmission structure 20 is connected to the first transmission structure 21 and is configured in a first position to connect with the second transmission structure 22 (see reference). Figures 1-3A ) and move to the second position to separate from the second transmission structure 22 (see reference) Figures 4-5A ).

[0047] For example, the first transmission structure 21 is arranged along the first direction D1 with the end effector assembly and is located near the end effector assembly. The first transmission structure 21 can be connected to at least one working part of the end effector assembly, and transmits driving force to the working part of the end effector assembly by driving the working part to move along the first direction D1 toward the proximal end or the distal end, thereby controlling the operation of the end effector assembly.

[0048] For example, a surgical instrument can be a stapler. For example, the end effector assembly can include various working parts, including an opening / closing actuator comprising a cartridge and an anvil, and a closing mechanism configured to, under the action of a driving force, bring the cartridge and anvil closer together to close the opening / closing actuator and clamp tissue, or to move the cartridge and anvil away from each other to open the opening / closing actuator and release tissue. For example, the closing mechanism is configured to move distally in a first direction D1 under the action of a driving force to open / close the opening / closing actuator, and to retract proximally to open the opening / closing actuator.

[0049] For example, the working part of the end effector may also include a staple pusher configured to move distally in a first direction D1 under the action of a driving force to push out staples in the staple cartridge to suture tissue, and to retract proximally.

[0050] For example, the working part of the end effector may also include a cutting blade, which is configured to move toward the distal end or toward the proximal end in a first direction D1 under the action of a driving force to cut tissue, and to move toward the proximal end in the first direction D1 after cutting to complete the retraction of the cutting blade.

[0051] Therefore, under normal operating conditions of the surgical instrument, the working component of the aforementioned end effector can move normally towards the distal end and retract towards the proximal end after the surgical procedure is completed, such as returning to the initial position. For example, the automatic retraction of the working component of the end effector can be controlled by the control mechanism in the surgical instrument handle. However, if the surgical instrument malfunctions and the drive rack cannot be electrically retracted (or the motor cannot rotate), the working component of the end effector cannot retract automatically. In this case, it is necessary to solve the technical problem of how to retract the working component of the end effector in a convenient and reliable manner.

[0052] According to the surgical instrument retraction device provided in the embodiments of this disclosure, since the conversion transmission structure 20 is always connected to the first transmission structure 21, and the conversion transmission structure 20 is connected to the second transmission structure 22 in the first position, the driving force from the drive mechanism 1 can be transmitted to the conversion transmission structure 20 through the second transmission structure 22, and then to the first transmission structure 21 through the conversion transmission structure 20, and then to the end effector via the first transmission structure 21, thereby controlling the movement of the end effector, such as controlling the movement of the working parts of the end effector; and, the conversion transmission structure 20 is configured to move to the second position to separate from the second transmission structure 22. At this time, the force transmission relationship between the second transmission structure 22 and the conversion transmission structure 20 is blocked, and the driving force from the drive mechanism 1 cannot be transmitted to the conversion transmission structure 20 and the end effector via the second transmission structure 22, while the conversion transmission structure 20 remains connected to the first transmission structure 21, so that the movement of the conversion transmission structure 20 can be easily controlled by external force to control the movement of the first transmission structure 21. When the surgical instrument is in normal working condition, the conversion transmission structure 20 is located in the first position. When a malfunction occurs and the working part of the end effector cannot be returned to the initial position, the conversion transmission structure 20 can be moved to the second position. At this time, the conversion transmission structure 20 can be connected to the external connector. The movement of the conversion transmission structure 20 can be controlled by manually operating the external connector. Thus, the working part of the end effector can be controlled to move along the first direction D1 through the first transmission structure 21. For example, the working part of the end effector can be controlled to retract towards the proximal end of the surgical instrument along the first direction D1.

[0053] Therefore, this embodiment of the present disclosure provides a manual forced retraction device that is easy to operate and occupies little space. When surgical instruments such as electric staplers malfunction and cannot cause the cutting blade and other working parts to retract automatically, the movement of the conversion transmission structure 20 can be manually controlled to make the cutting blade and other working parts automatically retract to the initial position.

[0054] For example, refer to Figure 3A The conversion transmission structure 20 has a first end located away from the second transmission structure 22 in the second direction D2. When the conversion transmission structure 20 is in the first position, the first end of the conversion transmission structure 20 is configured to be detachably connected to the first external connector 31 to drive the conversion transmission structure 20 to move to the second position via the first external connector 31; Reference Figure 4 and Figure 5AWhen the conversion transmission structure 20 is in the second position, the first end of the conversion transmission structure 20 is configured to be detachably connected to the second external connector 32 to drive the conversion transmission structure 20 to move through the second external connector 32 to transmit driving force to the end effector assembly, thereby controlling the working part of the end effector assembly to retract towards the proximal end of the surgical instrument along the first direction D1.

[0055] For example, refer to Figures 1-3B The second direction D2 intersects the first direction D1. The conversion transmission structure 20 extends along the second direction D2 and is configured to be movable in the second direction D2. The second transmission structure 22 and the first transmission structure 21 are arranged in the second direction D2. For example, the second direction D2 is perpendicular to the first direction D1. Thus, the first direction D1 can be axial, and the second direction can be longitudinal (a direction that is substantially perpendicular to the ground during surgical operations). This facilitates structural design, utilizes the longitudinal space to design the movement space of the conversion transmission structure, saves space, and facilitates operation. The downward pressure in the longitudinal direction makes it easier to move the conversion transmission structure 20 downward to the second position.

[0056] Figure 6 This is a schematic diagram of the sleeve of the conversion transmission structure of a surgical instrument retraction device according to an embodiment of this disclosure. Figure 7 This is a schematic diagram of the pin in the conversion transmission structure of a surgical instrument retraction device according to an embodiment of this disclosure. (In conjunction with...) Figures 3A-3B , Figure 6 and Figure 7 For example, the conversion transmission structure 20 includes a pin 24 and a sleeve 23, with the sleeve 23 fitted onto the pin 24 and connected to the first transmission structure 21. For example, the conversion transmission structure 20 includes a first connecting structure 231 and a second connecting structure 232 spaced apart in a second direction D2. For example, in the second direction D2, the second connecting structure 232 is located on the side of the first connecting structure 231 away from the main shaft of the surgical instrument (away from the end effector assembly), and the working part of the end effector assembly moves along the main shaft. (Reference) Figure 2 and Figures 3A-3B When the transmission structure 20 is in the first position, the first connecting structure 231 is connected to the first transmission structure 21, and the second connecting structure 232 is connected to the second transmission structure 22; (Reference) Figure 4 and Figure 5AWhen the transmission structure 20 is in the second position, the first connecting structure 231 remains connected to the first transmission structure 21, and the second connecting structure 232 is separated from the second transmission structure 22. The second transmission structure 22 is located within the interval 233 between the first connecting structure 231 and the second connecting structure 232. That is, the second transmission structure 22 moves into the interval 233, and no structure capable of connecting to the second transmission structure 22 is provided in the interval 233. Thus, the second connecting structure 232 can be separated from the second transmission structure 22. At this time, the second connecting structure 232 can no longer transmit the driving force from the drive mechanism 1 to the second transmission structure 22. This design makes it easy to separate the second connecting structure 232 from the second transmission structure 22, and it is less likely to cause damage to components during the separation process.

[0057] For example, refer to Figure 6 The first connecting structure 231 includes a first connecting key 231a disposed on the surface of the conversion transmission structure 20, and the second connecting structure 232 includes a second connecting key 232a disposed on the surface of the conversion transmission structure 20. The first connecting key 231a and the second connecting key 232a extend along a second direction D2 and are spaced apart in the second direction D2, with a gap 233 located between the first connecting key 231a and the second connecting key 232a. When the conversion transmission structure 20 is in the first position, the first transmission structure 21 is connected to the first connecting key 231a, and the second transmission structure 22 is connected to the second connecting key 232a. When the conversion transmission structure 20 is in the first position, the first transmission structure 21 is connected to the first connecting key 231a. For example, the gap 233 is a smooth keyway, so that when the conversion transmission structure 20 moves into the gap 233, it is no longer connected to the second connecting key 232a.

[0058] For example, the length of the first connecting key 231a is greater than the length of the second connecting key 232a. The length of the first connecting key 231a is large enough that, during the process of the switching transmission structure 20 moving from the first position to the second position, the first transmission structure 21 can slide along the first connecting key 231a and always remain connected to the first connecting key 231a.

[0059] Figure 8 This is a schematic diagram of the first gear of a retraction device for a surgical instrument according to an embodiment of this disclosure. Figure 9 This is a schematic diagram of the first rack of a retraction device for a surgical instrument according to an embodiment of this disclosure. Figure 10 This is a disassembly diagram of the components of a retraction device for a surgical instrument according to an embodiment of this disclosure. For example, refer to... Figures 2-3B and Figures 8-10The first transmission structure 21 includes a first gear 211 and a first rack 212, with the first rack 212 extending along a first direction D1; the second transmission structure 22 includes a second gear 221.

[0060] With the conversion transmission structure 20 in the first position, the connecting key 211a on the inner surface of the first gear 211 engages with the first connecting key 231a, the teeth of the first gear 211b on the outer surface of the first gear 211 mesh with the teeth 212a of the first rack 212, and the connecting key on the inner surface of the second gear 221 engages with the second connecting key 232a. The drive mechanism 1 is configured to drive the second gear 221 to rotate about an axis along the second direction D2, thereby driving the first gear 211 to rotate about an axis along the second direction D2. Furthermore, in the conversion transmission structure... When mechanism 20 is in the first position, the first connecting key 231a is connected to the first gear 211, and the second connecting key 232a is connected to the second gear 221. Thus, the rack is driven to move along the first direction D1. At this time, the output force of the drive mechanism 1 is transmitted along the "drive mechanism 1 - second gear 221 - conversion transmission structure 20 - first gear 211 - first rack 212". The output force of the drive mechanism 1 can be normally transmitted to the first rack 212 to drive the transmission rack to run, thereby driving the working parts that are directly or indirectly coupled to the rack to run.

[0061] When the conversion transmission structure 20 is in the second position, the first connecting key 231a remains connected to the first gear 211, and the second connecting key 232a is separated from the second gear 221. The second gear 221 is located within the gap between the first connecting key 231a and the second connecting key 232a, thereby separating the connecting key on the inner surface of the second gear 221 from the second connecting key 232a, and the two are no longer bonded. At this time, the first end of the conversion transmission structure 20 is configured to be detachably connected to the second external connector 32. For example, when the working part is normally driven to move towards the distal end of the surgical instrument along the first direction D1, such as performing operations such as pushing a nail or advancing a knife, the first gear 211 is driven to rotate around the first rotation direction by the drive mechanism 1. Then, during the manual retraction process, in the second position of the conversion transmission structure 20, the second external connector 32 is manually controlled to rotate in the second rotation direction opposite to the first rotation direction, thereby driving the working part to move towards the proximal end of the surgical instrument, thereby realizing the retraction of the working part (e.g., a cutting knife) that performs the surgical operation towards the proximal end of the surgical instrument.

[0062] For example, the first connecting key 231a and the second connecting key 232a are protrusions extending from the surface of the conversion transmission structure 20. Correspondingly, the connecting key on the inner surface of the first gear 211, which is bonded to the first connecting key 231a, and the connecting key on the inner surface of the second gear 221, which is bonded to the second connecting key 232a, are respectively grooves that match the protrusions. In another embodiment, the first connecting key 231a and the second connecting key 232a may be grooves located on the surface of the conversion transmission structure 20. Correspondingly, the connecting key on the inner surface of the first gear 211, which is bonded to the first connecting key 231a, and the connecting key on the inner surface of the second gear 221, which is bonded to the second connecting key 232a, are respectively protrusions that match the grooves.

[0063] For example, in one embodiment, the conversion transmission structure 20 includes a pin 24 and a sleeve 23 as described above, the sleeve 23 being fitted onto the pin 24 and connected to the first transmission structure 21. Figure 3A and Figure 6 As shown, the first connecting structure 231 and the second connecting structure 232 are located on the surface of the sleeve 23. The first connecting structure 231 is connected to the first transmission structure 21, and the sleeve 23 is configured to move from the first position to the second position.

[0064] refer to Figures 1-3B and Figure 6 When sleeve 23 is in the first position, sleeve 23 is connected to the second transmission structure 22. The first end 241 of pin 24 in the second direction D2, away from the second transmission structure 22, is configured to be detachably connected to the first external connector 31. The first external connector 31 is configured to move along the second direction D2 toward the second transmission structure 22 to contact the first end of sleeve 23 in the second direction D2, thereby applying pressure along the second direction D2 toward the second transmission structure 22 to sleeve 23. Sleeve 23 is configured to move from the first position to the second position along the second direction D2 under pressure, so that the second gear 221 is separated from sleeve 23. Thus, the separation of the second gear 221 from sleeve 23 is achieved by using the downward pressure generated by operating the first external connector 31 to move sleeve 23. The operation is easier and more convenient, and the structure is simple and occupies less space, which not only saves costs but also makes the anastomosis device structure more compact.

[0065] refer to Figures 4-5A and Figure 6The first end of the sleeve 23 includes a transmission connector 234. When the sleeve 23 is in the second position, the transmission connector 234 is configured to be detachably connected to the second external connector 32 so that the sleeve 23 can be driven to rotate about an axis along the second direction D2 by manipulating the second external connector 32, thereby driving the first transmission structure 21 to move, so that the manual rotation power is transmitted along the “second external connector 32-sleeve 23-first gear 211-first rack 212”, thereby transmitting driving force to the end effector.

[0066] For example, refer to Figure 7 The first end 241 of the pin 24 includes a first thread 242; Reference Figure 3A The first external connector 31 includes a second thread 311 that mates with the first thread 242. The first external connector 31 is configured to be driven to move along the first thread 242 to drive the sleeve 23 to move to a second position.

[0067] For example, combining Figure 3A and Figure 7 The length L of the first thread 242 is configured such that when the first external connector 31 moves to the end of the first thread 242 near the second transmission structure 22, the sleeve 23 just separates from the second transmission structure 22. That is, when the release nut 312 is screwed to the end of the first thread 242 of the pin, the second connecting key 232a below the sleeve 24 just separates from the second gear 221. For example, the pin 24 is a stepped pin, comprising a first part and a second part, the radial dimension of the first part being smaller than the radial dimension of the second part, and the junction of the first part and the second part forming a step. The first part serves as the first end 241 of the pin 24.

[0068] Figure 11 This is a schematic diagram of a first external connector and a second external connector for a retraction device of a surgical instrument according to an embodiment of this disclosure. For example, refer to... Figure 6 The transmission connection 234 of sleeve 23 includes nut 234a; Reference Figure 11 The second external connector 32 includes a nut sleeve 321 that mates with the nut 234a. For example, exemplarily, the nut sleeve 321 is a built-in hexagonal sleeve, and correspondingly, the nut serving as the transmission connector 234 is a hexagonal nut. This disclosure does not limit the specific shape of the nut sleeve, as long as the nut sleeve can mate with the nut serving as the transmission connector 234.

[0069] Figure 12 This is a schematic diagram of a release nut for a retraction device of a surgical instrument according to an embodiment of this disclosure. For example, refer to... Figure 3A , Figure 11 and Figure 12The first external connector 31 includes a first interface 310 and a release nut 312. The release nut 312 is configured to connect the first interface 310 to the first end of the pin 24. The release nut 312 has the aforementioned second thread 311, thereby connecting the first interface 310 to the first end of the pin 24 via the release nut 312. For example, the second thread 311 is an internal thread of the release nut 312. For example, the release nut 312 can be fitted into the first interface 310 and sleeved onto the first end 241 of the pin 24. Thus, by controlling the movement of the first interface 310 by external force (e.g., manual control), the release nut 312 is driven to rotate. The downward pressure generated during the rotation of the release nut 312 drives the sleeve 23 to move along the second direction D2 (downward direction in the figure) to the second position. Thus, by using the downward pressure generated by rotating the release nut 312 to move the sleeve 23, the second gear 221 is separated from the sleeve 23, making the operation easier and less strenuous, and easier to implement.

[0070] For example, the release nut 312 is a hexagonal nut, and the first interface 310 is a hexagonal sleeve that matches and connects with the release nut 312. Of course, the shape of the release nut is not limited in the embodiments of this disclosure, as long as the release nut can match and connect with the first interface.

[0071] For example, refer to Figure 12 The second external connector 32 includes a second interface 320, which includes a nut sleeve 321. For example, the first external connector 31 and the second external connector 32 belong to the same external component 3. For example, the first interface 310 and the second interface 320 are two interfaces of the same wrench to simplify the operation of the components and make the operation more convenient.

[0072] For example, refer to Figure 3A The surgical instrument also includes a third transmission structure 25, through which the second transmission structure 22 is connected to the drive mechanism 1. The third transmission structure 25 includes a third gear, and the teeth on the outer surface of the second gear 221 mesh with the teeth on the outer surface of the third gear. The drive mechanism 1 includes a motor, which includes a motor shaft. The motor shaft is connected to the third gear to drive the third gear to rotate, thereby realizing the transmission of the driving force output by the motor.

[0073] For example, refer to Figures 2-3BThe surgical instrument retraction device provided in at least one embodiment of this disclosure further includes an elastic element 4. The elastic element 4 is configured to apply an elastic force along the second direction D2 away from the second transmission structure 22 to the conversion transmission structure 20, so as to keep the sleeve in a first position when the surgical instrument is in a normal state, thereby maintaining the stability of force transmission and operation of the surgical instrument. For example, the elastic element 4 is sleeved on the conversion transmission structure, for example, sleeved on the sleeve 23. For example, the first end of the elastic element 4 is fixed between 211 and the sleeve 23, and the second end of the elastic element 4 is connected to the sleeve 23. For example, the sleeve 23 includes a boss 234, and the second end of the elastic element 4 is connected to the boss 234. The elastic element 4 is configured to apply the aforementioned elastic force to the boss 234 to keep the sleeve in a first position when the surgical instrument is in a normal state. Of course, the specific connection method between the elastic element 4 and the conversion transmission structure 20 is not limited to the above exemplary design. Those skilled in the art can also adopt other specific connection methods, as long as the elastic element 4 can apply an elastic force along the second direction D2 away from the second transmission structure 22 to the conversion transmission structure 20.

[0074] For example, refer to Figure 1 and Figure 10 The surgical instrument retraction device provided in at least one embodiment of this disclosure further includes a frame 5, which is configured as a positioning pin 24, a sleeve 23, a first transmission structure 21, a second transmission structure 22, a drive mechanism 1, and other components.

[0075] The above embodiments represent a design approach that balances simple components, reliable operation, and ease of use, but it is not limited to the designs described above. In another embodiment, for example, the conversion transmission structure is a columnar structure extending along the second direction D2, and the first end of the conversion transmission structure is configured to connect to a first external connector and a second external connector, respectively. That is, the conversion transmission structure is not limited to a pin and sleeve mating structure. The first external connector only needs to be able to connect to the first end of the conversion transmission structure to apply external force to the conversion transmission structure and drive it to move from a first position to a second position. The second external connector only needs to be able to connect to the first end of the conversion transmission structure when it is in the second position to apply external force to drive the conversion transmission structure to operate, thereby transmitting the external force to the end effector via the conversion transmission structure and the first transmission structure.

[0076] At least one embodiment of this disclosure also provides a surgical instrument, which includes a retraction device for any of the surgical instruments provided in this disclosure.

[0077] For example, surgical instruments may also include the aforementioned end effector components. For instance, if the surgical instrument is a stapler, the end effector components may include the various working parts described above, enabling the end effector components to perform operations such as closure, push-pin suturing, and cutting.

[0078] The following points also need to be explained:

[0079] (1) The accompanying drawings of the embodiments of this disclosure only involve the structures involved in the embodiments of this disclosure. Other structures can be referred to the general design.

[0080] (2) For clarity, the thickness of layers or regions in the drawings used to describe embodiments of the present disclosure is enlarged or reduced, i.e., these drawings are not drawn to actual scale.

[0081] (3) Where there is no conflict, the embodiments of this disclosure and the features in the embodiments can be combined with each other to obtain new embodiments.

[0082] The above description is merely an exemplary embodiment of the present invention and is not intended to limit the scope of protection of the present invention, which is determined by the appended claims.

Claims

1. A retraction device for a surgical instrument, comprising: A drive mechanism and a transmission mechanism, wherein the transmission mechanism includes a first transmission structure, a conversion transmission structure, and a second transmission structure; The first transmission structure is configured to transmit driving force to the end effector of a surgical instrument, and the second transmission structure is connected to the drive mechanism; The conversion transmission structure is connected to the first transmission structure and is configured in a first position to connect with the second transmission structure and moved to a second position to separate from the second transmission structure.

2. The retraction device for the surgical instrument according to claim 1, wherein, The first transmission structure and the end effector are arranged along a first direction, and a second direction intersects the first direction; the conversion transmission structure has a first end that is away from the second transmission structure in the second direction, and the first end of the conversion transmission structure is configured to be detachably connected to a first external connector to drive the conversion transmission structure to move to the second position via the first external connector; When the conversion drive structure is in the second position, the first end of the conversion drive structure is configured to be detachably connected to the second external connector to drive the conversion drive structure to move via the second external connector in order to transmit driving force to the end effector assembly.

3. The retraction device for surgical instruments according to claim 2, wherein, The first transmission structure and the end effector are arranged along a first direction, the second direction intersects the first direction, the conversion transmission structure extends along the second direction and is configured to be movable in the second direction, and the second transmission structure and the first transmission structure are arranged in the second direction.

4. The retraction device for the surgical instrument according to claim 3, wherein, The conversion transmission structure has a first connecting structure and a second connecting structure arranged at intervals in the second direction; When the conversion transmission structure is in the first position, the first connecting structure is connected to the first transmission structure, and the second connecting structure is connected to the second transmission structure; When the conversion transmission structure is in the second position, the first connecting structure remains connected to the first transmission structure, the second connecting structure is separated from the second transmission structure, and the second transmission structure is located within the interval between the first connecting structure and the second connecting structure.

5. The retraction device for a surgical instrument according to claim 4, wherein, The first connection structure includes a first connection key disposed on the surface of the conversion transmission structure, and the second connection structure includes a second connection key disposed on the surface of the conversion transmission structure. The first connection key and the second connection key extend along the second direction and are spaced apart in the second direction.

6. The retraction device for a surgical instrument according to claim 5, wherein, The length of the first connecting key is greater than the length of the second connecting key.

7. The retraction device for a surgical instrument according to claim 5, wherein, The first transmission structure includes a first gear and a first rack, the first rack extending along the first direction; the second transmission structure includes a second gear. When the conversion transmission structure is in the first position, the connecting key on the inner surface of the first gear engages with the first connecting key, the teeth on the outer surface of the first gear mesh with the teeth of the first rack, the connecting key on the inner surface of the second gear engages with the second connecting key, and the drive mechanism is configured to drive the second gear to rotate about an axis along the second direction, thereby driving the first gear to rotate about an axis along the second direction, and thus driving the rack to move along the first direction. When the conversion transmission structure is in the first position, the first connecting key is connected to the first gear, and the second connecting key is connected to the second gear; When the conversion transmission structure is in the second position, the first connecting key remains connected to the first gear, the second connecting key is separated from the second gear, and the second gear is located within the interval between the first connecting key and the second connecting key.

8. The retraction device for a surgical instrument according to claim 4, wherein, The conversion transmission structure includes a pin and a sleeve, the sleeve is sleeved on the pin, and the first connecting structure and the second connecting structure are located on the surface of the sleeve. The sleeve is configured to move from the first position to the second position; when the sleeve is in the first position, the sleeve is connected to the second transmission structure; The first end of the pin in the second direction, away from the second transmission structure, is configured to be detachably connected to the first external connector, the first external connector being configured to move in the second direction toward the second transmission structure to contact the first end of the sleeve in the second direction thereby applying pressure in the second direction toward the second transmission structure to the sleeve, the sleeve being configured to move in the second direction from the first position to the second position under the pressure; The first end of the sleeve includes a transmission connector. When the sleeve is in the second position, the transmission connector is configured to be detachably connected to the second external connector to drive the sleeve to rotate about an axis along the second direction via the second external connector to drive the first transmission structure to move, thereby transmitting driving force to the end effector assembly.

9. The retraction device of the surgical instrument according to claim 8, wherein, The first end of the pin includes a first thread, the first external connector includes a second thread that matches the first thread, and the first external connector is configured to be driven to move along the first thread to drive the sleeve to the second position. The transmission connection of the sleeve includes a nut, and the second external connection includes a nut sleeve that is matched and connected to the nut.

10. The retraction device of the surgical instrument according to claim 9, wherein, The length of the first thread is configured such that when the first external connector moves to the end of the first thread near the second transmission structure, the sleeve just separates from the second transmission structure.

11. The retraction device of the surgical instrument according to claim 9, wherein, The first external connector includes a first interface and a release nut, the release nut being configured to connect the first interface to a first end of the pin, the release nut having a second thread; The second external connector includes a second interface, and the second interface includes the nut sleeve; The first interface and the second interface are two interfaces of the same wrench.

12. The retraction device of the surgical instrument according to claim 7, wherein, The conversion transmission structure is a columnar structure extending along the second direction, and the first end of the conversion transmission structure is configured to be connected to the first external connector and the second external connector respectively.

13. The retraction device of the surgical instrument according to any one of claims 1-12, wherein, The surgical instrument further includes a third transmission structure, through which the second transmission structure is connected to the drive mechanism.

14. The retraction device for a surgical instrument according to claim 13, wherein, The second transmission structure includes a second gear, and the third transmission structure includes a third gear, wherein the teeth on the outer surface of the second gear mesh with the teeth on the outer surface of the third gear; The drive mechanism includes a motor, and the motor includes a motor shaft; the motor shaft is connected to the third gear to drive the third gear to rotate.

15. The retraction device of the surgical instrument according to any one of claims 1-12, further comprising an elastic element, wherein, The first transmission structure and the end effector are arranged along a first direction, and a second direction intersects the first direction. The elastic element is configured to apply an elastic force to the switching transmission structure along the second direction away from the second transmission structure.

16. A surgical instrument comprising a retraction device of the surgical instrument according to any one of claims 1-15.

Images