Handle assembly for a surgical instrument and surgical instrument

Abstract

This invention provides a handle assembly for a surgical instrument and the surgical instrument itself. The handle assembly includes a housing, an actuation mechanism, and a drive mechanism. The actuation mechanism is pivotally supported within and extends beyond the housing, and includes a wrench. The drive mechanism includes a drive rod for driving a staple pusher, and the wrench is configured to actuate the drive rod to move it along its axial direction. The actuation mechanism also includes an elastic plate connected to the wrench. The handle assembly further includes a limiting structure located within the housing, the limiting structure including a limiting protrusion. The elastic plate is configured to cooperate with the limiting protrusion such that when the drive rod is actuated by the wrench to move distally, the elastic plate moves along a first side of the limiting protrusion facing the wrench; when the drive rod is de-actuated to move proximally, the elastic plate moves along a second side of the limiting protrusion facing away from the wrench. Therefore, the surgical instrument can effectively avoid the risk of secondary staple delivery.

Description

Technical Field

[0001] This utility model relates to the field of medical devices, and in particular to a handle assembly of a surgical instrument and a surgical instrument. Background Technology

[0002] Surgical instruments are the core tools of surgery. Using reliable surgical instruments helps achieve precise surgery and improves the operator's efficiency. For example, during suturing operations, the use of surgical instruments can improve suturing efficiency. Utility Model Content

[0003] At least one embodiment of the present invention provides a handle assembly for a surgical instrument and a surgical instrument.

[0004] At least one embodiment of the present invention provides a handle assembly for a surgical instrument, including a housing; an actuation mechanism pivotally supported within and extending beyond the housing, the actuation mechanism including a wrench; and a drive mechanism including a drive rod for driving a pusher, the wrench being configured to actuate the drive rod to move the drive rod along its axial direction; wherein the actuation mechanism further includes an elastic plate connected to the wrench, and the handle assembly further includes a limiting structure located within the housing, the limiting structure including a limiting protrusion, the elastic plate being configured to cooperate with the limiting protrusion such that, during the distal movement of the drive rod by the wrench, the elastic plate moves along a first side of the limiting protrusion facing the wrench, and during the proximal movement of the drive rod by de-actuation, the elastic plate moves along a second side of the limiting protrusion facing away from the wrench.

[0005] For example, according to at least one embodiment of the present invention, the wrench is configured to have an unactuated position, a fully actuated position, and a partially actuated position between the unactuated position and the fully actuated position; the wrench and the elastic plate are configured such that: during the process of the wrench moving from the unactuated position through the partially actuated position to the fully actuated position, the elastic plate moves along a first side; and during the process of the wrench returning from the fully actuated position to the unactuated position, the elastic plate moves along a second side.

[0006] For example, according to at least one embodiment of the present invention, the limiting protrusion includes a slot located on the first side, the slot being configured to engage with the elastic sheet as the elastic sheet moves along the first side of the limiting protrusion facing the wrench, so as to keep the wrench in the partially actuated position.

[0007] For example, according to at least one embodiment of the present invention, the elastic sheet includes: an elastic body, the distal end of which is connected to the wrench; and an elastic mating portion disposed at the proximal end of the elastic body and configured to engage with the slot.

[0008] For example, according to at least one embodiment of the present invention, the limiting protrusion includes a first tooth and a second tooth located on the first side; the slot is disposed between the first tooth and the second tooth; the first tooth is further away from the top wall of the housing than the second tooth; during the process of the wrench moving from the unacted position to the fully acted position, the elastic piece is configured to undergo elastic deformation due to the force exerted by the first tooth toward the wrench and move along the first side; during the process of the wrench returning from the fully acted position to the unacted position, the elastic piece is configured to separate from the first tooth and rebound from the first side to the second side by its own elastic restoring force, and the elastic piece is also configured to undergo elastic deformation due to the force exerted by the second tooth away from the wrench and move along the second side.

[0009] For example, according to at least one embodiment of the present invention, the side surface of the first tooth away from the top wall of the outer shell is the first tooth surface; the side surface of the elastic fitting part near the top wall is the first mating surface; when the wrench moves from the unacted position to the fully actuated position, the first tooth surface guides the first mating surface to move along the first side near the top wall, and causes the elastic fitting part to enter the slot.

[0010] For example, according to at least one embodiment of the present invention, the surface of the second tooth near the top wall is the second tooth surface; the surface of the elastic mating part away from the top wall is the second mating surface; during the process of the wrench returning from the fully actuated position to the unacted position, the second tooth surface guides the second mating surface to move away from the top wall along the second side; when the wrench returns to the unacted position, the elastic piece is configured to separate from the limiting protrusion by its own elastic restoring force.

[0011] For example, according to at least one embodiment of the present invention, the elastic sheet further includes: a clearance portion, the clearance portion being configured to be close to the elastic mating portion and including a recess portion close to the elastic mating portion, the recess portion being configured to allow the limiting protrusion to pass through it, and the depth of the recess portion being greater than the height of the limiting protrusion.

[0012] For example, according to at least one embodiment of the present invention, the elastic sheet includes a hollow portion configured to allow the drive rod to pass through the elastic sheet during movement along the axial direction.

[0013] For example, according to at least one embodiment of the present invention, in response to the elastic sheet engaging with the slot, the handle assembly emits a sound to provide acoustic feedback.

[0014] For example, according to at least one embodiment of the present invention, the wrench includes a protrusion; the limiting structure further includes a force feedback structure installed within the housing; the force feedback structure is configured such that when the wrench moves to the partially actuated position, the protrusion abuts against the force feedback structure to provide feedback of increased resistance.

[0015] For example, according to at least one embodiment of the present invention, the force feedback structure includes a fixed portion and an elastic portion connected to each other; the fixed portion is fixedly connected within the housing; the elastic portion is configured to undergo elastic deformation under the increased force of the protrusion, so as to allow the wrench to move from the partially actuated position to the fully actuated position.

[0016] For example, according to at least one embodiment of the present invention, the thickness of the elastic portion gradually decreases in the direction from the end of the elastic portion near the fixed portion to the end away from the fixed portion.

[0017] For example, according to at least one embodiment of the present invention, the elastic portion includes a first sidewall away from the fixed portion in the axial direction, and the protrusion includes a second sidewall close to the drive rod in the axial direction; the first sidewall and the second sidewall match to contact the first sidewall and the second sidewall surface when the wrench is in the partially actuated position.

[0018] For example, according to at least one embodiment of the present invention, the fixing part and the elastic part are integrally formed.

[0019] For example, according to at least one embodiment of the present invention, the handle assembly further includes a biasing member; the biasing member is connected between the housing and the wrench; the biasing member is configured to bias the wrench so that the wrench returns from the fully actuated position to the unactuated position.

[0020] For example, according to at least one embodiment of the present invention, the wrench includes a hand-held portion located outside the housing and a pivot portion located inside the housing, the drive rod is connected to the distal side of the pivot portion, the elastic plate is connected to the proximal side of the pivot portion, and the limiting protrusion is configured to be close to the proximal side of the pivot portion.

[0021] At least one embodiment of the present invention provides a surgical instrument, including the handle assembly described in any of the above embodiments. Attached Figure Description

[0022] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings of the embodiments will be briefly introduced below. Obviously, the drawings described below only involve some embodiments of this utility model, and are not intended to limit this utility model.

[0023] Figure 1 This is a schematic diagram of the structure of a surgical instrument provided in at least one embodiment of the present invention.

[0024] Figure 2 for Figure 1 The diagram shows an exploded surgical instrument.

[0025] Figure 3 and Figure 4 for Figure 1 The diagram shows partial structural schematics of the handle assembly of the surgical instrument shown from different perspectives.

[0026] Figure 5 and Figure 6 The schematic diagrams show the structure of the handle assembly provided in different states according to the embodiments of this utility model.

[0027] Figure 7A and Figure 7B This is a schematic diagram of the structure of the suture staple in different states.

[0028] Figure 8 This is a schematic diagram of the limiting protrusion of the surgical instrument provided in an embodiment of the present invention.

[0029] Figure 9 This is a schematic diagram of the elastic sheet of a surgical instrument provided in an embodiment of the present invention.

[0030] Figure 10 A schematic diagram of the structure of the second housing of the surgical instrument provided in an embodiment of this utility model.

[0031] Figure 11 A schematic diagram of a portion of the handle assembly of a surgical instrument provided in an embodiment of this utility model. Detailed Implementation

[0032] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model 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 this utility model. Based on the described embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0033] Unless otherwise defined, the technical or scientific terms used in this invention shall 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 invention 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.

[0034] The features "parallel," "perpendicular," and "identical" used in this invention include the strictly defined meanings of "parallel," "perpendicular," and "identical," as well as cases where "approximately parallel," "approximately perpendicular," and "approximately identical" contain a certain degree of error. Taking into account measurement and the errors associated with the measurement of a specific quantity (i.e., limitations of the measurement system), they represent the acceptable deviation range for a specific value as determined by a person skilled in the art. For example, "approximately" can mean within one or more standard deviations, or within 10% or 5% of the value.

[0035] In this embodiment of the invention, "proximal end" and "proximal side" refer to the side closer to the operator, while "distal end" and "distal side" refer to the side farther away from the operator.

[0036] The surgical instruments provided in this embodiment of the invention may include a suturing device, for example, for suturing mesentery, fixing hernia patches, etc. The working principle of the suturing device is similar to that of a stapler, that is, firing multiple staples into the tissue to perform the suturing operation. During the suturing operation using the surgical instruments, the operator can operate the wrench of the surgical instruments to fire the staples, causing the staples to hook onto the target tissue, and then fire again to close the staples, thus completing the suturing of the target tissue. During the above operation, after the staples are pushed out by the staple pusher, the pusher may retract, such as back to the starting position. If the operator continues to operate, it may result in secondary staple delivery. Furthermore, it is difficult for the operator to obtain feedback that the surgical instruments have completed staple delivery; that is, the operator may fire once to fire the staple and close it directly without hooking onto the target tissue. This leads to a poor operator experience and is not conducive to the efficient completion of the surgery.

[0037] At least one embodiment of this utility model provides a handle assembly for a surgical instrument and a surgical instrument. The handle assembly of the surgical instrument includes: a housing; an actuation mechanism pivotally supported in and extending out of the housing, the actuation mechanism including a wrench; a drive mechanism including a drive rod for driving a pusher, the wrench being configured to actuate the drive rod to move the drive rod along its axial direction; wherein the actuation mechanism further includes an elastic plate connected to the wrench, and the handle assembly further includes a limiting structure located within the housing, the limiting structure including a limiting protrusion, the elastic plate being configured to cooperate with the limiting protrusion such that, during the process of the drive rod being actuated by the wrench to move distally, the elastic plate moves along a first side of the limiting protrusion facing the wrench, and during the process of the drive rod being de-actuated to move proximally, the elastic plate moves along a second side of the limiting protrusion opposite to the wrench.

[0038] At least one embodiment of this utility model provides a surgical instrument handle assembly and surgical instrument. During the operation of the drive rod by a wrench, a limiting protrusion can limit the elastic plate, preventing secondary staple ejection and providing operational feedback to the operator. Specifically, the limiting protrusion and the elastic plate cooperate so that, as the elastic plate moves along the first side of the limiting protrusion, after the drive rod drives the staple pusher to push the staple out of the staple channel, the limiting protrusion can limit the elastic plate, preventing the wrench from directly resetting the drive rod. Simultaneously, it provides feedback to the operator, allowing them to know that the staple has been pushed into place. This prevents the staple pusher from retracting, i.e., preventing it from returning to its starting position, thus avoiding secondary staple delivery. Simultaneously, the elastic plate can move along the second side of the limiting protrusion, thereby achieving its reset by bypassing the limiting protrusion. Therefore, the surgical instrument using the above-described handle assembly can effectively avoid the risk of secondary staple delivery, and the operator can easily know the status of the staple. Furthermore, the elastic plate can quickly reset, which is beneficial for the operator to perform continuous staple delivery operations.

[0039] The handle assembly of a surgical instrument and the surgical instrument itself are described below with reference to the accompanying drawings and through some embodiments.

[0040] Figure 1 This is a schematic diagram of the structure of a surgical instrument provided in at least one embodiment of the present invention. Figure 2 for Figure 1 The diagram shows an exploded surgical instrument. Figure 3 and Figure 4 for Figure 1 The diagram shows partial structural features of the handle assembly of the surgical instrument shown from different perspectives. To clearly illustrate the internal structure of the handle assembly, Figure 3 and Figure 4Part of the outer casing of the handle assembly has been removed. Figure 3 and Figure 4 The difference is that, Figure 3 and Figure 4 From different perspectives, the two sides of the limiting protrusion can be seen, which will be explained in detail later.

[0041] refer to Figure 1 and Figure 2 The handle assembly 10 includes a housing 100, an actuation mechanism 200, and a drive mechanism 300. The actuation mechanism 200 is pivotally supported within and extends beyond the housing 100, and includes a wrench 210. The drive mechanism 300 includes a drive pin pusher (see the example described later). Figure 5 The drive rod 310 of the nail pusher 21) shown is configured to actuate the drive rod 310 to move the drive rod 310 along its axis AX.

[0042] refer to Figure 2 The actuation mechanism 200 also includes a resilient sheet 220 connected to the wrench 210. The handle assembly 10 also includes a limiting structure 400 located within the housing 100, the limiting structure 400 including a limiting protrusion 410. (Reference) Figure 1 and Figure 3 The elastic plate 220 is configured to cooperate with the limiting protrusion 410 such that, as the drive rod 310 is actuated by the wrench 210 to move distally, the elastic plate 220 moves along the first side 411 of the limiting protrusion 410 facing the wrench 210. (Reference) Figure 1 and Figure 4 As the drive lever 310 is released from actuation to move proximally, the elastic plate 220 moves along the second side 412 of the limiting protrusion 410 opposite to the wrench 210.

[0043] refer to Figures 1 to 4The handle assembly of the surgical instrument provided in this embodiment of the present invention, during the actuation of the drive rod 310 by the wrench 210, utilizes the limiting protrusion 410 to limit the elastic plate 220, preventing secondary nail ejection and providing operational feedback to the operator. Specifically, the limiting protrusion 410 and the elastic plate 220 cooperate with each other, so that during the movement of the elastic plate 220 along the first side 411 of the limiting protrusion 410, after the drive rod 310 drives the nail pusher to push the suture nail out of the suture nail channel, the limiting protrusion 410 can limit the elastic plate 220, preventing the wrench 210 from directly resetting the drive rod 310, while simultaneously providing feedback to the operator so that the operator is aware that the nail has been pushed into place. This prevents the nail pusher from retracting, i.e., preventing the nail pusher from returning to the starting position, thereby avoiding secondary nail feeding. At the same time, the elastic plate 220 can move along the second side 412 of the limiting protrusion 410, thereby achieving the reset of the elastic plate 220 by bypassing the limiting protrusion 410. Therefore, surgical instruments using the aforementioned handle assembly can effectively avoid the risk of secondary staple delivery, and the operator can easily monitor the status of the staples. Furthermore, the elastic plate 220 can quickly reset, facilitating continuous staple delivery operations.

[0044] For example, refer to Figure 2 and Figure 3 The actuation mechanism 200 is rotatable relative to the housing 100 about a rotation axis R. For example, a wrench 210 in the actuation mechanism 200 extends out of the housing 100 and is configured for easy gripping. For example, when the wrench 210 rotates along a first direction V1 (e.g., counterclockwise), the wrench 210 can actuate the drive rod 310 distally, thereby driving the staple pusher in the end-stitching mechanism 20 to push out the staple. For example, in the example described later... Figure 5 The diagram illustrates how the staple pusher 21 in the end-stitching mechanism 20 pushes out the staple 30. For example, when the drive rod 310 is de-actuated, it moves proximally, and the wrench 210 rotates in a second direction V2 (e.g., clockwise), thereby resetting the staple pusher 20. The linkage between the wrench 210, drive rod 310, staple pusher 21, and staple will be discussed later and will not be elaborated upon here.

[0045] For example, refer to Figures 2 to 4 And in the examples described later Figure 8 The limiting protrusion 410 is a structure provided inside the housing 100 that protrudes inward relative to the inner wall of the housing 100. The limiting protrusion 410 may include two opposing sides, such as a first side 411 and a second side 412. For example, the first side 411 is the side of the limiting protrusion 410 facing the distal side, that is, the side facing the wrench 210. For example, the second side 412 is the side of the limiting protrusion 410 facing the proximal side, that is, the side facing away from the wrench 210.

[0046] For example, refer to Figure 2 The cooperation between the elastic sheet 220 and the limiting protrusion 410 means that a portion of the structure of the elastic sheet 220 can engage with a portion of the structure of the limiting protrusion 410 to achieve a limiting or guiding function. For example, the groove on the first side 411 of the limiting protrusion 410 can limit the elastic sheet 220. For example, the second side 412 of the limiting protrusion 410 can guide the elastic sheet 220 to reset.

[0047] For example, refer to Figure 4 When the drive lever 310 is deactivated, it means that the operator no longer applies external force to the wrench 210, causing the wrench 210 to stop applying the force that actuates the drive lever 310. At this time, the wrench 210 no longer actuates the drive lever 310 to move to the distal side.

[0048] For example, refer to Figure 1 and Figure 2 A protective tube may be fitted over the drive rod 310, and the protective tube may be connected between the housing 100 and the end sewing mechanism 20 to protect the drive rod 310. For example, to show the drive rod 310 more clearly, Figure 3 and Figure 4 The handle assembly shown has the protective tube removed.

[0049] Figure 5 and Figure 6 The schematic diagrams show the structure of the handle assembly provided in different states according to the embodiments of this utility model. Figures 1 to 4 The handle assembly shown has the wrench in the unacted position, as in the initial position. Figure 5 The handle assembly shown has the wrench in the partially actuated position. Figure 6 The handle assembly shown has the wrench in the fully actuated position.

[0050] refer to Figures 4 to 6In some examples, the wrench 210 is configured to have an unactuated position P1, a fully actuated position P3, and a partially actuated position P2 between the unactuated position P1 and the fully actuated position P3. The wrench 210 and the elastic plate 220 are configured such that: as the wrench 210 moves from the unactuated position P1 through the partially actuated position P2 to the fully actuated position P3, the elastic plate 220 moves along a first side 411; and as the wrench 210 returns from the fully actuated position P3 to the unactuated position P1, the elastic plate 220 moves along a second side 412. Thus, through the interaction of the elastic plate 220 and the limiting protrusion 410, the wrench 210 can switch between the unactuated position P1, the partially actuated position P2, and the fully actuated position P3. The interaction between the wrench 210 and the elastic plate 220 effectively prevents the wrench 210 from returning directly from the partially actuated position P2 to the unactuated position P1, thereby reducing the risk of secondary nail feeding and also facilitating feedback to the operator at each position. In this embodiment of the invention, the feedback includes, but is not limited to, one or more of tactile feedback, auditory feedback, and visual feedback.

[0051] Figure 7A and Figure 7B This is a schematic diagram of the structure of the suture staple in different states. Figure 7A The diagram illustrates the shape of the suture staples before closure molding. Figure 7B The diagram illustrates the shape of the suture staple after it has been closed and formed.

[0052] refer to Figure 4 , Figure 5 When the wrench 210 moves from the unactuated position P1 to the partially actuated position P2, the wrench 210 can actuate the drive rod 310 to move distally, thereby causing the nail pusher 21 to push the suture nail 30 out of the suture nail channel. At this time, the shape of the suture nail 30 pushed out by the nail pusher 21 is as follows: Figure 7A As shown. At this time, as Figure 5 As shown, the limiting protrusion 410 limits the elastic sheet 220, so that the wrench 210 can remain in the partially actuated position P2 without directly returning to the unactuated position P1.

[0053] refer to Figure 5 , Figure 6 When the wrench 210 moves from the partially actuated position P2 to the fully actuated position P3, the wrench 210 actuates the drive rod 310 to continue moving distally. Under the combined action of the nail pusher 21 and the anvil, the suture nail 30 is bent into shape. At this time, the shape of the suture nail 30 is as follows: Figure 7B As shown. Reference Figure 6During the above process, the elastic piece 220 disengages from the limiting protrusion 410 and continues to move along the first side 411 of the limiting protrusion 410, such as at the connection between the first side 411 and the second side 412 of the limiting protrusion 410 near the top wall 111, so that the wrench 210 can move from the partial actuation position P2 to the fully actuation position P3.

[0054] refer to Figure 6 , Figure 4 During the reset process of the wrench 210 (e.g., by means of the elastic restoring force of the biasing member 500), the elastic piece 220 moves along the second side 412 of the limiting protrusion 410, thereby guiding the elastic piece 220 to drive the wrench 210 to reset to the unacted position P1.

[0055] Figure 8 This is a schematic diagram of the limiting protrusion of the surgical instrument provided in an embodiment of the present invention.

[0056] refer to Figure 4 , Figure 5 and Figure 8 In some examples, the limiting protrusion 410 includes a slot 413 located on a first side 411. The slot 413 is configured to engage with the resilient piece 220 as the resilient piece 220 moves along the first side 411 of the limiting protrusion 410 facing the wrench 210, thereby holding the wrench 210 in a partially actuated position P2. Feedback can be provided to the operator when the slot 413 engages with the resilient piece 220. Thus, the operator can know that the wrench 210 is in the partially actuated position P2 when the resilient piece 220 engages with the slot 413.

[0057] Combination Figure 5 and Figure 8 As shown, during the movement of the elastic piece 220 along the first side 411, the elastic piece 220 undergoes elastic deformation due to the force exerted by the limiting protrusion 410 towards the wrench 210, and climbs upward along the first side 411 (i.e., towards the top wall 111) as the wrench 210 moves from the unacted position P1 to the fully actuated position P3. When the wrench 210 reaches the partially actuated position P2, at least a portion of the elastic piece 220 rebounds and enters the retaining groove 413, thereby achieving engagement between the elastic piece 220 and the retaining groove 413. Since the elastic piece 220 is difficult to easily disengage from the retaining groove 413, the wrench 210 can be held in the partially actuated position P2.

[0058] refer to Figure 5 and Figure 8 In some examples, in response to the engagement of the elastic plate 220 with the slot 413, the handle assembly 10 emits a sound to provide audible feedback. Thus, the operator can determine from the audible feedback that the wrench 210 is in the partially actuated position P2.

[0059] Figure 9 This is a schematic diagram of the elastic sheet of a surgical instrument provided in an embodiment of the present invention.

[0060] refer to Figure 8 and Figure 9 In some examples, the elastic plate 220 includes an elastic body 221 and an elastic engaging portion 222. The distal end of the elastic body 221 is connected to the wrench 210. The elastic engaging portion 222 is disposed at the proximal end of the elastic body 221 and configured to engage with the slot 413. As the elastic body 221 moves with the wrench 210, the elastic engaging portion 222 is subjected to a force exerted towards the wrench 210 by the limiting protrusion 410, causing the elastic plate 220 to undergo elastic deformation. When the wrench 210 moves from the unactuated position P1 to the partially actuated position P2, the elastic engaging portion 222 can enter into the slot 413, thereby engaging with the slot 413.

[0061] For example, Figure 9 The illustration shows that the elastic sheet is a separate component that can be installed and fixed to the wrench 210 by means of snap-fit ​​or other methods. However, the present invention is not limited to this; for example, the elastic body and the wrench can be integrally formed.

[0062] For example, refer to Figure 6 and Figure 9 The elastic sheet 220 has an overall arc-shaped structure that bulges towards the near side, which makes it easy to achieve elastic deformation of the elastic sheet 220 and is beneficial for stress dispersion.

[0063] In some examples, reference Figure 4 and Figure 8 The limiting protrusion 410 includes a first tooth 401 and a second tooth 402 located on the first side 411. The slot 413 is disposed between the first tooth 401 and the second tooth 402, with the first tooth 401 being further away from the top wall 411 of the housing 100 than the second tooth 402.

[0064] In some examples, reference Figures 3 to 9 During the movement of the wrench 210 from the unacted position P1 to the fully actuated position P3, the elastic element 220 is configured to undergo elastic deformation and move along the first side 411 due to the force exerted by the first tooth 401 toward the wrench 210. For example, during the movement of the wrench 210 from the unacted position P1 to the fully actuated position P3, the elastic element 220 is subjected to a force from the first tooth 401 toward the wrench 210, thereby causing the elastic engagement portion 222 of the elastic element 220 to climb upward along the first side 411, that is, to climb toward the top wall 111 of the housing 100.

[0065] Understandably, reference Figures 3 to 9When the elastic fitting part 222 engages with the slot 413, the operator can know that the wrench 210 has reached the partially actuated position P2. As the operator continues to apply force to the wrench 210, causing it to move from the partially actuated position P2 to the fully actuated position P3, the elastic element 220 moves along with the wrench 210. The elastic fitting part 222 continues to climb upward and disengages from the slot 413, so that the elastic element 220 is no longer limited by the limiting protrusion 410.

[0066] In some examples, reference Figure 6 and Figure 4 During the process of the wrench 210 returning from the fully actuated position P3 to the unacted position P1, the elastic plate 220 is configured to separate from the first tooth 401 and rebound from the first side 411 to the second side 412 by its own elastic restoring force. The elastic plate 220 is also configured to undergo elastic deformation and move along the second side 412 due to the force of the second tooth 402 moving away from the wrench 210.

[0067] refer to Figures 3 to 9 When the wrench 210 reaches the fully actuated position P3, the elastic mating part 222 reaches the tip of the second tooth 402 closest to the top wall 111, and thus, relying on the elastic restoring force of the elastic plate 220 itself, it springs back from the first side 411 to the second side 412. During the reset process of the wrench 210 from the fully actuated position P3 to the unacted position P1, the second side 412 applies a force away from the wrench 210 to the elastic mating part 222, which opens the elastic plate 220 and causes the elastic mating part 222 to move along the second side 412 in a direction away from the top wall 111, and the wrench 210 reaches the unacted position P1, thus completing the reset of the wrench 210.

[0068] In some examples, reference Figure 4 , Figure 8 and Figure 9 The surface of the first tooth 401 away from the top wall 111 of the outer casing 100 is the first tooth surface S11. The surface of the elastic fitting part 222 near the top wall 111 is the first mating surface S21. As the wrench 210 moves from the unacted position P1 to the fully actuated position P3, the first tooth surface S11 guides the first mating surface S21 to move along the first side 411 near the top wall 111, and causes the elastic fitting part 222 to enter the slot 413. Thus, the first tooth surface S11 can guide the first mating surface S21, thereby guiding the elastic fitting part 222 to move relative to the first tooth 401. Moreover, the operator can operate the wrench 210 with less effort to move the wrench 210 from the unacted position P1 to the partially actuated position P2.

[0069] For example, refer to Figure 8 and Figure 9The first tooth surface S11 can be constructed as an inclined plane to facilitate the guidance of the first mating surface S21. For example, the first mating surface S21 can be constructed as an inclined plane to facilitate climbing upwards along the first tooth surface S11.

[0070] refer to Figure 8 and Figure 9 In some examples, the surface of the second tooth 402 closest to the top wall 111 is the second tooth surface S12. The surface of the elastic mating part 222 furthest from the top wall 111 is the second mating surface S22. Figure 4 , Figure 6 , Figure 8 and Figure 9 During the process of the wrench 210 returning from the fully actuated position P3 to the unactuated position P1, the second tooth surface S12 guides the second mating surface S22 to move away from the top wall 111 along the second side 412. Thus, the second tooth surface S12 can guide the second mating surface S22, thereby guiding the elastic mating part 222 to move downward relative to the second side 412.

[0071] For example, refer to Figure 8 and Figure 9 The second tooth surface S12 can be constructed as an inclined plane to facilitate the guidance of the second mating surface S22. For example, the second mating surface S22 can be constructed as an inclined plane to facilitate downward movement along the second tooth surface S12.

[0072] For example, refer to Figure 8 and Figure 9 The slopes of the two surfaces of the first tooth 401 and the second tooth 402 facing each other can be different to increase the accommodating space of the slot 413, thereby providing sufficient space for the elastic mating portion 222 of the elastic piece 220. For example, the inclination angle of the surface of the first tooth 401 facing the second tooth 402 relative to the axis of the drive rod is smaller than the inclination angle of the surface of the second tooth 402 facing the first tooth 401.

[0073] For example, refer to Figure 8 and Figure 9 Tangentially to the direction of movement of the elastic fitting part 222, the elastic fitting part 222 overlaps with the first tooth surface S11. Therefore, when the wrench 210 is in the unactivated position P1, the elastic fitting part 222 does not contact the first tooth 401. When the wrench 210 drives the elastic member 220 to move from the unactivated position P1 to the partially activated position P2, the elastic fitting part 222 can abut against the first tooth surface S11 and be guided by the first tooth surface S11.

[0074] refer to Figure 8 and Figure 9The elastic sheet 220 also includes a clearance portion 223. The clearance portion 223 is positioned near the elastic mating portion 222 and includes a recess 2231 near the elastic mating portion 222. The recess 2231 is configured to allow the limiting protrusion 410 to pass through it, and the depth of the recess 2231 is greater than the height of the limiting protrusion 410. By providing the clearance portion 223 near the elastic mating portion 222, and ensuring that the depth of the recess 2231 is greater than the height of the limiting protrusion 410, the recess 2231 can be used to clear the limiting protrusion 410, thereby preventing interference with the relative movement of the elastic sheet 220 relative to the limiting protrusion 410.

[0075] refer to Figure 8 and Figure 9 For example, during the movement of the elastic plate 220 with the wrench 210, only the elastic engagement portion 222 of the elastic plate 220 may contact the limiting protrusion 410. For example, when the wrench 210 is in the unacted position P1, at least a portion of the limiting protrusion 410 is located within the recess 2231.

[0076] refer to Figure 8 and Figure 9 For example, the depth of the recess 2231 can be the maximum vertical distance between the edge of the recess 2231 and the reference plane containing the edge of the elastic fit portion 222.

[0077] refer to Figure 8 and Figure 9 For example, the height of the limiting protrusion 410 can be the maximum vertical distance between the side surface of the limiting protrusion 410 away from the housing 100 and the inner wall of the housing 100.

[0078] refer to Figures 4 to 6 as well as Figure 9 In some examples, the elastic plate 220 includes a cutout 224, which is configured to allow the drive rod 310 to pass through the elastic plate 220 during movement in the axial direction. During the movement of the wrench 210 from the unactuated position P1 to the fully actuated position P3 to actuate the drive rod 310, the cutout 224 provides movement space for the drive rod 310, preventing interference between the elastic plate 220 and the reciprocating drive rod 310.

[0079] Figure 10 A schematic diagram of the structure of the second housing of the surgical instrument provided in an embodiment of this utility model.

[0080] refer to Figure 2 and Figure 10For example, the housing 100 may include a first housing 110 and a second housing 120, which can be snapped together to form a receiving cavity that can accommodate at least a portion of the actuation mechanism 200 and at least a portion of the drive mechanism 300. Figures 3 to 6 And the examples described later Figure 11 The handle assembly 10 shown has the second housing 120 removed to show the internal structure of the handle assembly 10 more clearly.

[0081] refer to Figure 10 For example, a limiting protrusion 410 is provided on the second housing 120. (See reference) Figure 2 and Figure 10 For example, the first housing 110 and the second housing 120 are respectively provided with limiting protrusions 410. For example, refer to Figure 9 The elastic sheet 220 may include two elastically mating portions 222 and two recessed portions 2231 disposed opposite each other in its width direction. For example, the elastic sheet 220 may be an axisymmetric structure.

[0082] refer to Figure 9 and Figure 10 For example, the two limiting protrusions 410 on the first housing 110 and the second housing 120 can correspond one-to-one with the two elastic mating parts 222. As a result, the two sides of the elastic sheet 220 can be subjected to the force from the two limiting protrusions 410, and the force is more evenly distributed.

[0083] refer to Figure 2 and Figure 10 For example, the two limiting protrusions 410 on the first housing 110 and the second housing 120 can have substantially the same structure. However, the present invention is not limited to this; the limiting protrusions provided on the first housing and the limiting protrusions provided on the second housing can also have different structures, as long as they can cooperate with the two elastic mating parts of the elastic sheet.

[0084] For example, the limiting protrusion may be provided only on the first housing or the second housing. For example, the elastic sheet may have an elastic engagement portion only on one side. For example, the elastic sheet may be subjected to force from the limiting protrusion only on one side, thereby realizing the switching of the wrench between the unacted position, the partially acted position, and the fully acted position. This utility model does not impose any limitations on these aspects.

[0085] Figure 11 This is a schematic diagram of a portion of the handle assembly of a surgical instrument provided in an embodiment of the present invention. It should be noted that, in order to clearly illustrate the wrench and the limiting protrusion, Figure 11 The elastic element has been removed.

[0086] In some examples, reference Figure 11 and Figure 5The wrench 210 includes a protrusion 211. The limiting structure 400 also includes a force feedback structure 420 mounted within the housing 100. The force feedback structure 420 is configured such that when the wrench 210 moves to the partially actuated position P2, the protrusion 211 abuts against the force feedback structure 420 to provide feedback of increased resistance.

[0087] refer to Figure 11 and combined Figure 2 , Figure 5 By incorporating the force feedback structure 420 and the protrusion 211 of the wrench 210, when the wrench 210 moves to the partially actuated position, the protrusion 211 abuts against the force feedback structure 420, causing a momentary increase in resistance, thus providing the operator with feedback on increased resistance. Therefore, the operator can more easily determine that the wrench 210 has reached the partially actuated position based on the audible feedback when the elastic plate 220 engages with the slot 413 and the feedback on increased resistance. Furthermore, for the operator, the force feedback structure 420 provides a more intuitive feedback on increased resistance, and this feedback is largely unaffected by external environmental factors such as volume.

[0088] In some examples, reference Figure 5 , Figure 6 The force feedback structure 420 includes a fixed portion 421 and an elastic portion 422 connected to each other. The fixed portion 421 is fixedly connected within the housing 100. The elastic portion 422 is configured to elastically deform under the increased force of the protrusion 211, allowing the wrench 210 to move from the partially actuated position P2 to the fully actuated position P3. Thus, the wrench 210 can overcome the resistance provided by the force feedback structure 420 and continue moving to the fully actuated position P3.

[0089] refer to Figure 5 , Figure 6 For example, during the movement of the wrench 210 from the partially actuated position P2 to the fully actuated position P3, the protrusion 211 can apply a force to the elastic part 422, causing the elastic part 422 to undergo elastic deformation. For example, the protrusion 211 can move to below the elastic part 422, causing the end of the elastic part 422 away from the fixed part 421 to tilt towards the top wall 111.

[0090] refer to Figure 11 In some examples, the thickness of the elastic portion 422 gradually decreases in the direction from the end of the elastic portion 422 near the fixed portion 421 to the end away from the fixed portion 421. This reduces stress concentration, resulting in more uniform deformation of the elastic portion 422 and preventing stress concentration at the connection between the elastic portion 422 and the fixed portion 421 during elastic deformation. Consequently, the service life of the force feedback structure 420 can be improved.

[0091] refer to Figure 5and Figure 11 In some examples, the elastic portion 422 includes a first sidewall W1 located away from the fixed portion 421 in the AX direction, and the protrusion 211 includes a second sidewall W2 located near the drive rod 310 in the AX direction. The first sidewall W1 and the second sidewall W2 mate to make the first sidewall W1 and the second sidewall W2 face each other when the wrench 210 is in the partially actuated position P2. By making the first sidewall W1 face each other, the contact between the protrusion 211 and the elastic portion 422 is more stable, thereby providing better feedback to the operator regarding increased resistance.

[0092] refer to Figure 11 For example, the first sidewall W1 is an inclined plane. For example, the second sidewall W2 is an inclined plane. Thus, when the operator operates the wrench 210 to move it from the partially actuated position P2 to the fully actuated position P3, the elastic part 422 can be guided to undergo elastic deformation by the second sidewall W2, such as tilting towards the top wall.

[0093] For example, the resistance felt by the operator can be adjusted by adjusting the angle between the slope of the first sidewall, the slope of the second sidewall, and the tangential direction of the movement of the protrusion.

[0094] refer to Figure 11 In some examples, the fixing part 421 and the elastic part 422 are integrally formed, which can improve the connection reliability between the fixing part 421 and the elastic part 422. However, the present invention is not limited to this. For example, the fixing part and the elastic part can also be independent parts, and the two can be installed and fixed together by means of snap-fit ​​or other methods.

[0095] refer to Figures 4 to 6 and Figure 11 The handle assembly 10 also includes a biasing member 500 connected between the housing 100 and the wrench 210. The biasing member 500 is configured to bias the wrench 210 so that it returns from the fully actuated position P3 to the unacted position P1. By providing the biasing member 500, the elastic restoring force of the biasing member 500 can be used to reset the wrench 210. For example, the biasing member can be a spring.

[0096] refer to Figure 11In some examples, the wrench 210 includes a handle 212 located outside the housing 100 and a pivot 213 located inside the housing 100. A drive rod 310 is connected to the distal side of the pivot 213, an elastic plate 220 is connected to the proximal side of the pivot 213, and a limiting protrusion 410 is positioned near the proximal side of the pivot 213. Thus, the operator can actuate the drive rod 310 by operating the handle 212, thereby driving the pivot 213. Furthermore, the elastic plate 220 connected to the proximal side of the pivot 213 can cooperate with the limiting protrusion 410 located near the proximal side of the pivot 213 to switch the wrench 210 between the unacted position P1, the partially actuated position P2, and the fully actuated position P3.

[0097] refer to Figure 11 For example, the hand-held part 212 can be configured with a structural shape suitable for holding.

[0098] refer to Figure 10 and Figure 11 For example, the end of the wrench 210 located within the housing 100 includes a guide hole 201, and the handle assembly 10 also includes a guide pin 600, which extends into the guide hole 201 and passes through the drive rod 310. The housing 100 is provided with a guide rail 101 extending along the AX axis, and the guide pin 600 is configured to move within the guide rail 101 to guide the drive rod 310 to move in the AX axis direction. Thus, when the wrench 210 rotates about the axis of rotation, the guide hole 201 and the guide rail 101 guide the direction of movement of the guide pin 600, thereby actuating the drive rod 310.

[0099] Understandable, Figure 10 The guide rail 101 on the second housing 120 is schematically shown, but the present invention is not limited thereto. For example, the first housing may also be provided with a guide rail 101. Figure 10 The guide rails on the second housing shown are the same as those on the first and second housings, so that the guide pin is guided by the guide rails on both housings. For example, guide rails may be provided only on one of the first and second housings, and this invention does not limit this.

[0100] This utility model embodiment also provides a surgical instrument, including the handle assembly in any of the above examples. Since the surgical instrument of this utility model embodiment uses the aforementioned handle assembly, it also has corresponding beneficial technical effects, which will not be elaborated further here.

[0101] For example, the surgical instruments provided in this embodiment of the present invention can be suturing devices.

[0102] The following points need to be explained:

[0103] (1) The accompanying drawings of the embodiments of this utility model only involve the structures involved in the embodiments of this utility model. Other structures can be referred to the general design.

[0104] (2) Where there is no conflict, features of the same embodiment and different embodiments of the present invention can be combined with each other.

[0105] The above description is merely an exemplary embodiment of the present utility model and is not intended to limit the scope of protection of the present utility model. The scope of protection of the present utility model is determined by the appended claims.

Claims

1. A handle assembly for a surgical instrument, characterized in that, include: shell; An actuation mechanism, which is pivotally supported in and extends out of the housing, includes a wrench; A drive mechanism, the drive mechanism including a drive rod for driving a nail pusher, the wrench being configured to actuate the drive rod to move the drive rod along its axial direction; The actuation mechanism further includes an elastic plate connected to the wrench, and the handle assembly further includes a limiting structure located within the housing. The limiting structure includes a limiting protrusion, and the elastic plate is configured to cooperate with the limiting protrusion such that, during the process of the drive rod being actuated by the wrench to move distally, the elastic plate moves along a first side of the limiting protrusion facing the wrench, and during the process of the drive rod being de-actuated to move proximally, the elastic plate moves along a second side of the limiting protrusion facing away from the wrench.

2. The handle assembly according to claim 1, characterized in that, The wrench is configured to have an unactuated position, a fully actuated position, and a partially actuated position between the unactuated position and the fully actuated position; The wrench and the elastic plate are configured such that, as the wrench moves from the unacted position through the partially actuated position to the fully actuated position, the elastic plate moves along the first side; As the wrench returns from the fully actuated position to the unactuated position, the elastic plate moves along the second side.

3. The handle assembly according to claim 2, characterized in that, The limiting protrusion includes a slot located on the first side, the slot being configured to engage with the elastic piece as the elastic piece moves along the first side of the limiting protrusion facing the wrench, so as to keep the wrench in the partially actuated position.

4. The handle assembly according to claim 3, characterized in that, The elastic sheet includes: An elastic body, the distal end of which is connected to the wrench; An elastic fitting portion is disposed at the proximal end of the elastic body and configured to engage with the slot.

5. The handle assembly according to claim 4, characterized in that, The limiting protrusion includes a first tooth and a second tooth located on the first side; the slot is disposed between the first tooth and the second tooth; the first tooth is further away from the top wall of the outer casing than the second tooth; During the process of the wrench moving from the unacted position to the fully actuated position, the elastic plate is configured to undergo elastic deformation and move along the first side due to the force exerted by the first tooth toward the wrench; During the process of the wrench returning from the fully actuated position to the unactuated position, the elastic plate is configured to separate from the first tooth and rebound from the first side to the second side by its own elastic restoring force. The elastic plate is also configured to undergo elastic deformation and move along the second side due to the force exerted by the second tooth away from the wrench.

6. The handle assembly according to claim 5, characterized in that, The surface of the first tooth away from the top wall of the outer shell is the first tooth surface; The surface of the elastic mating part near the top wall is the first mating surface; As the wrench moves from the unactivated position to the fully activated position, the first toothed surface guides the first mating surface to move along the first side toward the top wall, and causes the elastic mating part to enter the slot.

7. The handle assembly according to claim 5, characterized in that, The surface of the second tooth closest to the top wall is the second tooth surface; The surface of the elastic mating part away from the top wall is the second mating surface; During the process of the wrench returning from the fully actuated position to the unactuated position, the second tooth surface guides the second mating surface to move away from the top wall along the second side; When the wrench returns to the unacted position, the elastic plate is configured to separate from the limiting protrusion by its own elastic restoring force.

8. The handle assembly according to claim 4, characterized in that, The elastic sheet also includes: The clearance portion is configured to be close to the elastic mating portion and includes a recessed portion close to the elastic mating portion, the recessed portion being configured to allow the limiting protrusion to pass through it, and the depth of the recessed portion being greater than the height of the limiting protrusion.

9. The handle assembly according to claim 8, characterized in that, The elastic sheet includes a cutout portion configured to allow the drive rod to pass through the elastic sheet during movement along the axial direction.

10. The handle assembly according to claim 3, characterized in that, In response to the engagement of the elastic sheet with the slot, the handle assembly emits a sound to provide audible feedback.

11. The handle assembly according to any one of claims 2-10, characterized in that, The wrench includes a protrusion; the limiting structure also includes a force feedback structure installed inside the housing; The force feedback structure is configured such that when the wrench is moved to the partially actuated position, the protrusion abuts against the force feedback structure to provide feedback of increased resistance.

12. The handle assembly according to claim 11, characterized in that, The force feedback structure includes a fixed part and an elastic part connected to each other; the fixed part is fixedly connected inside the outer shell. The elastic portion is configured to undergo elastic deformation under the increased force of the protrusion, allowing the wrench to move from the partially actuated position to the fully actuated position.

13. The handle assembly according to claim 12, characterized in that, The thickness of the elastic portion gradually decreases in the direction from the end of the elastic portion near the fixed portion to the end away from the fixed portion.

14. The handle assembly according to claim 12, characterized in that, The elastic portion includes a first sidewall away from the fixed portion in the axial direction, and the protrusion includes a second sidewall close to the drive rod in the axial direction; The first sidewall mates with the second sidewall to bring the first sidewall into contact with the second sidewall surface when the wrench is in the partially actuated position.

15. The handle assembly according to claim 12, characterized in that, The fixing part and the elastic part are integrally formed.

16. The handle assembly according to any one of claims 2-10, characterized in that, The handle assembly further includes a biasing member; the biasing member is connected between the housing and the wrench; The biasing element is configured to bias the wrench so that the wrench returns from the fully actuated position to the unactuated position.

17. The handle assembly according to any one of claims 1-10, characterized in that, The wrench includes a hand-held portion located outside the housing and a pivot portion located inside the housing. The drive rod is connected to the distal side of the pivot portion, the elastic plate is connected to the proximal side of the pivot portion, and the limiting protrusion is positioned close to the proximal side of the pivot portion.

18. A surgical instrument, characterized in that, Includes the handle assembly according to any one of claims 1-17.

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