Staple cartridge of surgical instrument and surgical instrument with staple cartridge

Abstract

A surgical instrument, the surgical instrument comprising a tip tool rotatable in at least one direction, the tip tool comprising: a jaw (jaw) unit having a first jaw (jaw) accommodating a staple cartridge and a second jaw (jaw) opposite the first jaw; the working component can move in the length direction of the first jaw; and a first elastic member provided at a proximal end portion of the first jaw and restricting movement of the working member depending on whether the first jaw accommodates the cartridge, the first elastic member having one end supported by the cartridge and elastically deformed when the cartridge is placed in the first jaw, and the other end supported by the cartridge and elastically deformed when the cartridge is placed in the first jaw. Therefore, the first elastic component relieves movement limitation on the working component.

Description

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims the benefit of Korean Patent Application No. 10-2024-0050320 filed on April 15, 2024, in the Korean Intellectual Property Office, the entire contents of which are incorporated herein by reference. Technical Field

[0003] The present invention relates to a surgical instrument, and more particularly, to a surgical instrument that can be mounted on a robot arm or manually operated for use in laparoscopic surgery or various other surgeries. Background Art

[0004] In recent years, laparoscopic surgery, which reduces postoperative recovery time and complications through small incisions, has become widely used. Laparoscopic surgery involves making multiple small incisions in the patient's abdomen and performing the procedure while observing the interior of the abdominal cavity. It is widely used in general surgery and other areas.

[0005] When performing such laparoscopic surgery, a suturing instrument inserted into the body is used to sew up the surgical site in the abdominal cavity. As such a suturing instrument, a surgical stapler that suturing the surgical site with medical staples is used.

[0006] Generally speaking, surgical staplers are medical instruments widely used for cutting and anastomosing organs in abdominal and thoracic organ surgeries. Such surgical staplers include open staplers used in thoracotomy and laparotomy, and endoscopic staplers used in thoracoscopic and laparoscopic surgeries.

[0007] The advantage of surgical staplers is that they simultaneously cut the surgical site and anastomose the organs, shortening the surgical time while also allowing for precise suturing of the surgical site. Furthermore, compared to surgical sutures, which are used to cut and sew tissue together, surgical staplers offer faster recovery and less scarring, making them widely used in modern surgery. In particular, surgical staplers are widely used in cancer surgery to cut cancerous tissue and sew up cut sites.

[0008] The above-mentioned background art is technical information possessed by the inventor in order to derive the present invention, or obtained in the process of deriving the present invention, and cannot necessarily be said to be known art disclosed to the public before submitting the present invention. Summary of the Invention

[0009] An object of the present application is to provide a surgical instrument which can be mounted on a robot arm or manually operated for laparoscopic surgery or various other surgeries, the surgical instrument having a working member advancement preventing structure when a staple cartridge is not placed on the surgical instrument.

[0010] Other aspects will be set forth in part in the description which follows, and in part will become apparent to those skilled in the art upon examination of the description or can be learned by practice of the application.

[0011] An embodiment of the present application provides a surgical instrument including an end tool rotatable in at least one direction, the end tool including a jaw unit having a first jaw which can accommodate a cartridge and a second jaw opposite the first jaw, a working member movable in a length direction of the first jaw, and a first elastic member provided at a proximal end portion of the first jaw and limiting movement of the working member according to whether or not the first jaw accommodates the cartridge, one end of the first elastic member being supported by the cartridge and elastically deformed when the cartridge is placed in the first jaw, thereby releasing the movement limitation of the working member.

[0012] In an embodiment of the present application, the working member includes a locking protrusion protruding from one side of a main body and capable of limiting movement of the working member when the cartridge is not placed in the first jaw.

[0013] In an embodiment of the present application, the working member includes a first slit formed by cutting a portion of the main body, the locking protrusion being capable of protruding from the main body to the first slit.

[0014] In an embodiment of the present application, the first elastic member includes a locking flange provided at the first slit so as to limit movement of the working member by engaging with the locking protrusion when the cartridge is not placed in the first jaw.

[0015] In an embodiment of the present application, if the cartridge is placed in the first jaw, a position of the locking flange is changed due to elastic deformation of the first elastic member, thereby releasing the movement limitation of the working member due to engagement of the locking flange with the locking protrusion, and the working member can be moved forward to a distal end portion of the first jaw.

[0016] In an embodiment of the present application, the working member can include a locking groove formed to correspond to the locking protrusion and capable of engaging with the locking protrusion to limit movement of the working member when the cartridge is not placed in the first jaw.

[0017] In an embodiment of the present application, the locking groove can be recessed on one side of a seating portion of the first elastic member seated in the first jaw.

[0018] In an embodiment of the present application, if the cartridge is seated in the first jaw, the position of the locking groove is changed due to elastic deformation of the first elastic member, thereby releasing the restriction on the movement of the working member due to the engagement of the locking protrusion with the locking flange, and the working member can be moved forward toward the distal end of the first jaw.

[0019] In an embodiment of the present application, the locking protrusion and the locking groove can each be provided in pairs.

[0020] In an embodiment of the present application, the first elastic member can include a first extension portion elastically deformed in contact with a guide surface inclined on one side of the cartridge.

[0021] In an embodiment of the present application, the first elastic member can include a seating portion seated on the first jaw, and a second extension portion bent and extended from the seating portion, and a portion thereof in contact with the second jaw.

[0022] In an embodiment of the present application, the first extension portion is inclined, and a portion of the first extension portion can form a predetermined angle with the seating portion.

[0023] In an embodiment of the present application, the second extension portion can be provided between the second jaw and the working member to restrict the rotation of the second jaw.

[0024] In an embodiment of the present application, the first extension portion and the second extension portion can each be provided in pairs, and can be provided on both sides with the body of the working member as a center.

[0025] In an embodiment of the present application, the first jaw is provided at a distal end, and can include a first groove corresponding to a coupling protrusion provided in the cartridge.

[0026] An embodiment of the present application provides a surgical instrument including: a tip tool rotatable in at least one direction; and a cartridge mountable on the tip tool, the tip tool including: a jaw unit having a first jaw in which the cartridge is accommodated and a second jaw opposite to the first jaw; and a working member movable in a length direction of the first jaw, the cartridge including: a housing accommodating a plurality of suturing nails; a wedge drawing out the plurality of suturing nails as the wedge moves from a proximal end to a distal end of the housing according to movement of the working member; and a second elastic member provided to the housing and having a deformation portion elastically deformable, the second elastic member limiting movement of the working member according to a position of the wedge.

[0027] In an embodiment of the present application, the second elastic member is provided as a pair and can provide a restoring force in a direction in which the deformation portions face each other.

[0028] In an embodiment of the present application, the deformation portions of the pair of second elastic members can intersect and engage when the wedge deviates from an initial position.

[0029] In an embodiment of the present application, the housing can include a second groove for fixing the second elastic member, and the second elastic member can further include a fixing portion bent and extended from the deformation portion and independently inserted into the second groove.

[0030] In an embodiment of the present application, the wedge can include: a base plate; a guide plate protruding from the base plate; and a draw-out plate provided on the base plate and spaced apart from each other on opposite sides of the guide plate, forming a pair of first gaps.

[0031] In an embodiment of the present application, the second elastic member can be independently placed in the pair of first gaps when the wedge is placed in an initial position.

[0032] In an embodiment of the present application, the second elastic member can be provided such that the deformation portions are spaced apart from each other by a predetermined interval of the guide plate of the wedge when the wedge is placed in an initial position.

[0033] In an embodiment of the present application, an end portion of the deformation portion of the second elastic member can be formed as a curved surface.

[0034] An embodiment of the present application provides a staple cartridge of a surgical instrument, wherein the surgical instrument has a tip tool which is rotatable in at least one direction and has a working member which is movable in a length direction, the staple cartridge of the surgical instrument including: a housing which accommodates a plurality of staples; a wedge which leads out the plurality of staples as the working member moves from a proximal end to a distal end of the housing; and a second elastic member which is provided to the housing and has an elastically deformable deformation portion, the second elastic member limiting movement of the working member according to a position of the wedge.

[0035] In an embodiment of the present application, the second elastic member is provided as a pair and can provide a restoring force in a direction in which the deformation portions face each other.

[0036] In an embodiment of the present application, the deformation portions of the pair of second elastic members can intersect and engage when the wedge deviates from an initial position.

[0037] In an embodiment of the present application, the housing can include a second groove for fixing the second elastic member, and the second elastic member can further include a fixing portion which is bent and extended from the deformation portion and is inserted into the second groove.

[0038] In an embodiment of the present application, the wedge can include: a base plate; a guide plate which protrudes from the base plate; and a lead-out plate which is provided on the base plate and is provided at both sides spaced apart from each other with the guide plate as a center, forming a pair of first gaps.

[0039] In an embodiment of the present application, the second elastic member can be placed in the pair of first gaps when the wedge is placed in an initial position.

[0040] In an embodiment of the present application, the second elastic member can be provided such that the deformation portions have a predetermined interval through the guide plate of the wedge when the wedge is placed in an initial position.

[0041] In an embodiment of the present application, an end portion of the deformation portion of the second elastic member can be formed as a curved surface.

[0042] Aspects, features and advantages of the present application other than the above will become apparent from the following drawings, claims and description. BRIEF DESCRIPTION OF DRAWINGS

[0043] Aspects, features and advantages of certain embodiments of the present application will become apparent from the following description in connection with the accompanying drawings.

[0044] Figure 1Perspective view of a surgical instrument according to an embodiment of the present application.

[0045] Figure 2 Perspective view of a surgical instrument according to an embodiment of the present application. Figure 1 Perspective view of a tip tool of a surgical instrument according to an embodiment of the present application.

[0046] Figure 3 Perspective view of a tip tool of a surgical instrument according to an embodiment of the present application. Figure 1 Exploded perspective view of a partial structure of a surgical instrument according to an embodiment of the present application.

[0047] Figure 4 Perspective view of a working member according to an embodiment of the present application. Figure 3 Enlarged perspective view of a working member according to an embodiment of the present application.

[0048] Figure 5 Perspective view of a staple cartridge according to an embodiment of the present application. Figure 6 Perspective view of a staple cartridge according to an embodiment of the present application. Figure 3 Exploded perspective view of a partial structure of a staple cartridge according to an embodiment of the present application.

[0049] Figure 7 Perspective view of a partial structure of a staple cartridge according to an embodiment of the present application. Figure 3 Perspective view of a partial structure of a staple cartridge according to an embodiment of the present application.

[0050] Figure 8 Perspective cross-sectional view of a partial structure of a staple cartridge according to an embodiment of the present application. Figure 3 Perspective cross-sectional view of a partial structure of a staple cartridge according to an embodiment of the present application.

[0051] Figure 9 Cross-sectional side view of a partial structure of a staple cartridge according to an embodiment of the present application. Figure 3 Cross-sectional side view of a staple suturing action of a surgical instrument according to an embodiment of the present application.

[0052] Figure 10 Cross-sectional side view of a staple suturing action of a surgical instrument according to an embodiment of the present application. Figure 1 Cross-sectional side view of a staple suturing action of a surgical instrument according to an embodiment of the present application.

[0053] Figure 11 Cross-sectional side view of a staple suturing action of a surgical instrument according to an embodiment of the present application. Figure 1 Cross-sectional side view of a staple suturing action of a surgical instrument according to an embodiment of the present application.

[0054] Figure 12 Enlarged perspective view of a first elastic member of a tip tool according to an embodiment of the present application. Figure 2

[0055] Perspective view of a first elastic member of a tip tool according to an embodiment of the present application when disposed in a first jaw. Figure 13 Figure 12 Cross-sectional side view of a first elastic member of a tip tool according to an embodiment of the present application when disposed in a first jaw.

[0056] Cross-sectional side view of a first elastic member of a tip tool according to an embodiment of the present application when disposed in a first jaw. Figure 14 Figure 12 Cross-sectional side view of a first elastic member of a tip tool according to an embodiment of the present application in an elastically deformed state.

[0057] Figure 15 Figure 12 Cross-sectional side view of a first elastic member of a tip tool according to an embodiment of the present application in an elastically deformed state.

[0058] Figure 16 ​​Schematic view of a working member and a first elastic member according to another embodiment of the present application.

[0059] Figure 17 Schematic view of a working member and a second elastic member according to another embodiment of the present application. Figure 2

[0060] Figure 18 Figure 17

[0061] Figure 19 Figure 17

[0062] Figure 20 Figure 17 DETAILED DESCRIPTION

[0063] Embodiments of the present application will now be described in detail with reference to the accompanying drawings, in which like reference numerals are used to refer to like elements throughout. As such, the embodiments of the present application can have different forms and should not be construed as being limited to the descriptions set forth herein. Accordingly, the embodiments of the present application are merely described below, by referring to the accompanying drawings, in order to explain aspects of the present application. The term "and / or" includes a combination of one or more associated listed items as well as all possible combinations of the associated listed items. Expressions such as "at least one of," when preceding the list of elements, modify the entire list of elements and do not modify the individual elements of the list.

[0064] The following embodiments will be described in detail with reference to the accompanying drawings, in which like reference numerals refer to like elements throughout. The same elements are denoted by the same reference numerals, and repeated explanation is omitted when the same or corresponding elements are referred to in the description of each drawing.

[0065] Since various modifications can be suggested to these embodiments, specific embodiments are shown in the drawings and are described in detail in the detailed description. The effects, features, and methods of achieving the effects and features of the present embodiments will become more apparent with reference to the drawings and the detailed description as follows. However, the present embodiments are not limited to the embodiments disclosed below, but can be implemented in various forms.

[0066] In describing the present application, if it is determined that a detailed description of the related known technology can obscure the gist of the present application, a detailed description thereof will be omitted.

[0067] In the following embodiments, singular expressions include plural expressions unless the context clearly indicates otherwise. Although the terms first, second, and the like can be used to describe various constituent elements, the constituent elements should not be limited by the terms. The terms are used only for the purpose of distinguishing one constituent element from another.

[0068] ​​​​​​​In the following embodiments, terms such as “including” or “having” refer to the presence of features or constituent elements described in the present specification, and do not preclude the possibility of adding one or more other features or constituent elements.

[0069] In the following embodiments, when a part of a unit, region, component, etc. is referred to as being on or over another part, this includes not only the case where it is directly on the other part, but also the case where other units, regions, components, etc. are interposed therebetween.

[0070] In the following embodiments, terms such as “connected” or “coupled” do not necessarily mean a direct and / or fixed connection or coupling of two components, unless the context clearly indicates otherwise, and do not exclude the presence of another component between the two components.

[0071] In the accompanying drawings, the sizes of the components may be enlarged or reduced for ease of description. For example, the sizes and thicknesses of the components shown in the accompanying drawings are arbitrarily shown for ease of description, and the present invention is not necessarily limited to the contents shown.

[0072] (Structure of surgical instruments)

[0073] Figure 1 is a perspective view of a surgical instrument 10 according to an embodiment of the present invention, Figure 2 for Figure 1 A perspective view of the end tool 100 of the surgical instrument 10. Figure 3 for Figure 1 A perspective view of a partial structure of a surgical instrument 10, Figure 4 for Figure 3 FIG. 1 is an enlarged perspective view of the working member 120 . Figure 5 and Figure 6 for Figure 3 A perspective view of the staple cartridge 500 is shown. Figure 7 for Figure 3 An exploded perspective view of a partial structure of a nail cartridge 500, Figure 8 for Figure 3 A perspective cross-sectional view of a partial structure of a nail magazine 500, Figure 9 for Figure 3 A cross-sectional side view of the partial structure of the nail magazine 500.

[0074] See also Figure 1 A surgical instrument 10 according to an embodiment of the present invention includes an end tool 100 , an operating portion 200 , a power transmission portion (not shown), and a connecting portion 400 .

[0075] The connecting portion 400 is in the shape of a hollow shaft and can accommodate one or more wires and electrical wires. One end of the connecting portion 400 is coupled to the operating portion 200, and the other end is coupled to the end tool 100. The connecting portion 400 can be used to connect the operating portion 200 and the end tool 100.

[0076] On the other hand, the operating part 200 is formed at one end of the connecting part 400 and has an interface that can be directly manipulated by the doctor, such as a pliers shape, a rod shape, a lever shape, etc. When the doctor manipulates it, it is connected to the corresponding interface to make the end tool 100 inserted into the surgical patient's body perform a predetermined operation, thereby performing the operation.

[0077] Among them, although Figure 1 , an operating portion 200 in the form of a handle that can be rotated when a finger is inserted is shown, but the concept of the present invention is not limited thereto, and various forms of operating portions can be used as long as they can be connected to the end tool 100 to operate the end tool 100.

[0078] The end tool 100 is formed at the other end of the connecting portion 400 and is inserted into the surgical site to perform the required operation. As an example of such an end tool 100, Figure 2 As shown, a jaw unit 110 for performing a gripping action can be used. However, the concept of the present invention is not limited thereto, and various surgical devices can also be used as the end tool 100. For example, a configuration such as a single-arm cauterizer can also be used as an end tool. This end tool 100 is connected to a power transmission part (not shown) via an operating part 200, and receives a driving force from the operating part 200 via the power transmission part (not shown), thereby performing the actions required for the operation, such as gripping, cutting, and suturing.

[0079] The end tool 100 of the surgical instrument 10 according to an embodiment of the present invention can rotate in at least one direction. For example, the end tool 100 can rotate around Figure 1 The pitch motion of the Y axis is executed at the same time. Figure 1 Yaw motion and actuation motion of the Z axis.

[0080] On the other hand, the power transmission part (not shown) transmits the driving force of the operation part 200 to the end tool 100 by connecting the operation part 200 and the end tool 100, and may include a plurality of wires, pulleys, connectors, joints, gears, etc.

[0081] In describing the present application, the portion close to the user side, i.e., the portion close to the operation portion 200 will be described as a proximal end, and the portion away from the user side will be described as a distal end.

[0082] For example, referring to Figure 1 and Figure 2 In the end tool 100, the portion close to the operation portion 200 will be defined as a proximal end 101 of the end tool 100, and the portion away from the operation portion 200 will be defined as a distal end 102 of the end tool 100. Describing this from another angle, the proximal end 101 of the end tool 100 can be described as the portion close to the connection portion 400, and the distal end 102 of the end tool 100 can be described as the portion away from the connection portion 400.

[0083] Also, referring to Figure 1 and Figure 5 In the cartridge 500, the portion close to the operation portion 200 will be defined as a proximal end 501 of the cartridge 500, and the portion away from the operation portion 200, i.e., the portion close to the end of the end tool 100 will be defined as a distal end 502. Describing this from another angle, the proximal end 501 of the cartridge 500 can be described as the portion close to the connection portion 400, and the distal end 502 of the cartridge 500 can be described as the portion away from the connection portion 400.

[0084] Further, in describing the present application, the movement from the proximal end to the distal end of the end tool 100 will be described as an advancing movement, and the movement from the distal end to the proximal end will be described as a retreating movement.

[0085] For example, the working member 120 to be described later can be advanced from the proximal end 101 to the distal end 102 of the end tool 100, and can be retreated from the distal end 102 to the proximal end 101 of the end tool 100. Further, the wedge 550 to be described later can be advanced from the proximal end 501 to the distal end 502 of the cartridge 500 by the working member 120.

[0086] (Detailed structure of end tool)

[0087] The end tool 100 of the surgical instrument 10 will be described in more detail below. Figure 1

[0088] Referring to Figures 1 to 4 , the end tool 100 of an embodiment of the present application has a jaw unit 110 and a working member 120.

[0089] ​The tip tool 100 has a jaw unit 110 for performing a grip action. The jaw unit 110 has a first jaw 111 which can accommodate the cartridge 500 and a second jaw 112 which can be disposed opposite the first jaw 111.

[0090] The working member 120 is disposed at the first jaw 111 and can move linearly in the length direction of the first jaw 111.

[0091] One side of the working member 120 can come into contact with a wedge 550 disposed inside the cartridge 500. The working member 120 can perform a staple suturing action by advancing movement while pushing the wedge 550 disposed inside the cartridge 500.

[0092] The working member 120 can have a blade 123. The working member 120 has the blade 123 at one side and a sharp edge portion 123a capable of cutting tissue is formed in an area of the blade 123.

[0093] In the working member 120, at least a part of the edge portion 123a of the blade 123 is led out to the outside of the first jaw 111 and the cartridge 500, so that the tissue disposed between the first jaw 111 and the second jaw 112 can be cut. The edge portion 123a of the blade 123 can always be led out to the outside of the first jaw 111. Alternatively, the edge portion 123a of the blade 123 is accommodated inside the first jaw 111 or inside the cartridge 500 at ordinary times, and is led out to the outside of the first jaw 111 only when the working member 120 moves in the length direction.

[0094] Thus, the working member 120 can perform a staple suturing and cutting action while moving linearly in the length direction of the first jaw 111. At this time, the linear motion of the working member 120, that is, the advancing movement from the proximal end portion 101 to the distal end portion 102 of the tip tool 100 or the retreating movement from the distal end portion 102 to the proximal end portion 101 of the tip tool 100, can be various methods.

[0095] In an example, the rotational motion of the pulley can be converted into the reciprocating linear motion of a reciprocating movement assembly (not shown), and the working member 120 can linearly move by the reciprocating movement assembly (not shown) which performs the reciprocating linear motion. Alternatively, the wire can be directly fixed to the working member 120 so that the working member 120 can linearly move by using the structure of the pulley and the wire. However, the technical idea of the present application is not limited thereto, and various mechanisms which make the working member 120 linearly move can be used, of course. Hereinafter, for the sake of convenience, a case in which the working member 120 linearly moves using the above-described reciprocating movement assembly (not shown) will be described as an example.

[0096] The end tool 100 of an embodiment of the present application can include pulleys related to the rotational movement of the first jaw 111 and the second jaw 112.

[0097] Here, although the pulleys facing each other are formed in parallel to each other as shown in the drawing, the idea of the present application is not limited thereto, and each pulley can be formed in various positions and sizes suitable for the configuration of the end tool.

[0098] In addition, the end tool 100 of an embodiment of the present application can include an end tool center 180 and a pitch center 107.

[0099] The first rotation shaft 141 and the second rotation shaft 142 are inserted through the end tool center 180, and the inside of the end tool center 180 can accommodate at least a part of the pulley combined with the first rotation shaft 141. In addition, the end tool center 180 can accommodate at least a part of the pulley combined with the second rotation shaft 142 in the inside thereof.

[0100] On the other hand, the pulley 151 serving as an end tool pitch pulley can be formed at one end portion of the end tool center 180. The pulley 151 can be formed one-body with the end tool center 180. That is, one end portion of the end tool center 180 can be formed with a pulley in a disc shape, and the outer circumferential surface thereof can further be formed with a groove in which a wire can be wound. Alternatively, the pulley 151 can be formed as a separate member from the end tool center 180 and combined to the end tool center 180. A wire (not shown) is combined to the pulley 151 serving as an end tool pitch pulley, and the pulley 151 rotates around the third rotation shaft 143 to perform a pitch action.

[0101] The third rotation shaft 143 and the fourth rotation shaft 144 to be described later are inserted through the pitch center 107, and the pitch center 107 can be combined with the end tool center 180 (and the pulley 151) through the third rotation shaft 143. Accordingly, the end tool center 180 and the pulley 151 can rotate around the third rotation shaft 143 with respect to the pitch center 107.

[0102] In addition, the pitch center 107 can accommodate at least a part of the pulley combined with the third rotation shaft 143 in the inside thereof. In addition, the pitch center 107 can accommodate at least a part of the pulley combined with the fourth rotation shaft 144 in the inside thereof.

[0103] Among them, the first rotation axis 141 can be used as an end tool jaw pulley rotation axis, the second rotation axis 142 can be used as an end tool jaw auxiliary pulley rotation axis, the third rotation axis 143 can be used as an end tool pitch rotation axis, and the fourth rotation axis 144 can be used as an end tool pitch auxiliary rotation axis of the end tool 100. One or more pulleys can be inserted into each of the first to fourth rotation axes 141 to 144.

[0104] Although not shown in the drawings, pulleys serving as end tool jaw pulleys are fixedly incorporated into the first jaw 111 and the second jaw 112, allowing them to rotate together with each jaw. Yawing and actuation of the end tool 100 are performed based on the rotation of the pulleys. Specifically, yawing occurs when the pulleys of each jaw rotate in the same direction about the first rotation axis 141, and actuation occurs when the pulleys of each jaw rotate in opposite directions about the first rotation axis 141.

[0105] Herein, the jaws and the pulley may be formed as separate components and combined with each other, or the jaws and the pulley may be formed as one-body.

[0106] (Detailed structure of the nail magazine)

[0107] The following will describe in more detail Figure 1 The nail magazine 500 of the surgical instrument 10.

[0108] See also Figures 5 to 9 The staple cartridge 500 is configured to be attachable to or detachable from the first jaw 111 and includes a plurality of staples 530 therein for stapling and cutting tissue. The staple cartridge 500 may include a cover 510, a housing 520, staples 530, a lead-out member 535, a wedge 550, and a reciprocating assembly (not shown).

[0109] The housing 520 forms the exterior of the staple cartridge 500 and is generally shaped like a hollow box with one side (top) removed. The housing 520 can accommodate the staples 530, the lead-out member 540, the wedge 550, and a reciprocating assembly (not shown). The housing 520 may have a generally U-shaped cross-section.

[0110] The cover 510 covers the top of the housing 520. The cover 510 may be formed with staple holes 511, through which a plurality of staples 530 may be discharged to the outside. The staples 530 housed within the housing 520 prior to stapling may be pushed upward by the wedge 550 during the stapling operation. Thus, the staples 530 are drawn out of the staple cartridge 500 while passing through the staple holes 511 of the cover 510, thereby performing stapling.

[0111] On the other hand, in the cap 510, a slit 512 can be formed along the length direction thereof. The blade 123 of the working member 120 can protrude to the outside of the cartridge 500 through the slit 512. When the blade 123 of the working member 120 passes along the slit 512, the sutured tissue can be cut.

[0112] The inside of the housing 520 can be provided with a plurality of suture needles 530. As the working member 120 to be described later moves linearly in one direction, the plurality of suture needles 530 are sequentially pushed up from the inside of the housing 520 to the outside, so that suturing, i.e., needle suturing, can be performed. Among them, the material of the suture needle 530 can include titanium, stainless steel, etc.

[0113] On the other hand, a lead-out member 540 can also be provided between the housing 520 and the suture needle 530. In other words, the suture needle 530 can be provided at the top of the lead-out member 540. At this time, the wedge 550 pushes up the lead-out member 540 while moving linearly in one direction, and the lead-out member 540 can push up the suture needle 530.

[0114] Thus, the case where it can be described that the wedge 550 pushes up the suture needle 530 includes the case where the wedge 550 directly pushes up the suture needle 530, and the case where the wedge 550 pushes up the lead-out member 540 and the lead-out member 540 pushes up the suture needle 530 (i.e., the case where the wedge 550 indirectly pushes up the suture needle 530).

[0115] As the working member 120 moves forward from the proximal end 101 to the distal end 102 of the end tool 100, the wedge 550 can move forward together with the working member 120. The wedge 550 is provided inside the housing 520, one side of which is in contact with the working member 120, so that the working member 120 can push the wedge 550, so that it can move forward together with the working member 120 from the proximal end 501 to the distal end 502 of the cartridge 500.

[0116] The wedge 550 can be provided inside the housing 520. The wedge 550 moves linearly together with the working member 120 and moves forward in the extension direction of the connecting portion 400 to perform a needle suturing action. That is, the wedge 550 is provided inside the housing 520, one side of which is in contact with the working member 120, so that the working member 120 can move forward together with the wedge 550 from the proximal end 501 to the distal end 502 of the cartridge 500 while pushing the wedge 550.

[0117] Thus, the wedge 550 can sequentially contact the lead-out member 540 or the plurality of suture needles 530, and can function to move together with the working member 120 toward the distal end 502 to sequentially push up the suture needles 530 and lead them out to the outside of the cartridge 500.

[0118] (nail stapling action of surgical instrument)

[0119] Figure 10 for showing in sections Figure 1 a cross-sectional side view of the nail stapling action of the surgical instrument 10, Figure 11 for showing as a whole Figure 1 a cross-sectional side view of the nail stapling action of the surgical instrument 10.

[0120] Referring to Figure 10 and Figure 11 , in the state shown in (a) of Figure 10 , when the wedge member 550 moves in the direction of the arrow Al in (b) of Figure 10 , the inclined surface 553a of the wedge member 550 pushes the lead-out member 540 upward, and the lead-out member 540 pushes the lower side of the stapling nail 530 upward. And, thereby, the stapling nail 530 is discharged to the outside of the first jaw 111 and the nail cartridge 500.

[0121] In this state, when the wedge member 550 further moves in the direction of the arrow A2 of (c) of Figure 10 , the discharged stapling nail 530 is continuously pushed upward by the wedge member 550 in a state of contacting with the anvil (not shown) of the second jaw 112, thereby performing nail stapling while the both end portions of the stapling nail 530 are bent.

[0122] In the process of continuously performing these actions, as shown in Figure 11 , the nail stapling is sequentially performed from the stapling nail 530 on the proximal end portion 501 side to the stapling nail 530 on the distal end portion 502 side among the plurality of stapling nails 530.

[0123] In summary, in the surgical instrument 10 according to the embodiment of the present application, when the working member 120 moves in the direction of the distal end portion 102 of the end tool 100, the wedge member 550 moves together with the working member 120 in the direction of the distal end portion 502 of the nail cartridge 500, and discharges the stapling nail 530 to the outside of the nail cartridge 500, while the blade 123 of the working member 120 cuts the body tissue. Wherein, it can be described that the surgical instrument 10 according to the embodiment of the present application simultaneously performs the stapling and cutting of the body tissue when the body tissue is interposed between the first jaw 111 and the second jaw 112.

[0124] On the other hand, if the first jaw 111 does not have the staple cartridge 500 installed therein, or if the staple cartridge 500 is installed but the stapling action has been performed and no staples 530 are present therein, only the cutting action of the body tissue can be performed when the working member 120 moves forward toward the distal end 102, and the stapling action cannot be performed due to the absence of the staples 530. Thus, if the body tissue is cut without being stapled, excessive bleeding or leakage of cancer tissue, etc. can occur.

[0125] Therefore, there is a need for a lockout system that can prevent the working member 120 from moving forward toward the distal end 102 when the end effector 100 does not have the staples 530 installed therein.

[0126] To solve these problems, the present application provides a surgical instrument staple cartridge having a lockout system that can prevent the working member 120 from moving forward without the staples 530 by using the following mechanisms.

[0127] (First mechanism of the lockout system)

[0128] Figure 12 For Figure 2 An enlarged perspective view of the first elastic member 130 of the end effector 100 of the present application. Figure 13 For Figure 12 A perspective view of the first elastic member 130 of the present application when disposed in the first jaw 111, Figure 14 For Figure 12 A cross-sectional side view of the first elastic member 130 of the present application when disposed in the first jaw 111, Figure 15 For Figure 12 A cross-sectional side view of the first elastic member 130 of the present application in an elastically deformed state.

[0129] Referring to Figures 12 to 15 The end effector 100 of the surgical instrument 10 according to an embodiment of the present application can have a first elastic member 130. The first elastic member 130 is disposed at the proximal end of the first jaw 111, and can limit the movement of the working member 120 depending on whether the first jaw 111 accommodates the staple cartridge 500.

[0130] Hereinafter, the shape of the first elastic member 130 according to an embodiment of the present application and the arrangement relationship with the working member 120 will be described, and the first mechanism of the lockout system for preventing the working member 120 from moving forward will be described in detail.

[0131] First, referring again to Figure 4The working member 120 can have a body 121 and a locking protrusion 122. The body 121 forms a base of the working member 120, and one side thereof can be in contact with the wedge 550.

[0132] The body 121 can have a first slit 121a formed by cutting a portion. The first slit 121a provides a space in which a portion of the first elastic member 130 can be disposed.

[0133] The locking protrusion 122 can protrude from the body 121 toward the first slit 121a. The locking protrusion 122 can engage with the first elastic member 130, particularly the locking flange 132, disposed in the first slit 121a.

[0134] On the other hand, referring to Figures 12 to 14 The first elastic member 130 is disposed in the first jaw 111, and can engage with the working member 120 to restrict the forward movement of the working member 120 when the staple cartridge 500 is not mounted in the first jaw 111.

[0135] The first elastic member 130 can have seating portions 131 and a locking flange 132. The seating portions 131 can be disposed in pairs, and the locking flange 132 can connect the pair of seating portions 131.

[0136] The seating portions 131 of the first elastic member 130 can be seated on the first jaw 111. The seating portions 131 can form a first opening 135 together with the locking flange 132, and the locking protrusion 122 of the working member 120 can be positioned in the first opening 135 when the first elastic member 130 is disposed on the first jaw 111.

[0137] That is, the first elastic member 130 can be disposed such that the locking flange 132 is positioned in the first slit 121a of the working member 120 and the locking protrusion 122 is positioned in the first opening 135. Thereby, the first elastic member 130 engages with the locking protrusion 122 of the working member 120, and thus can prevent the working member 120 from moving when the staple cartridge 500 is not mounted in the first jaw 111.

[0138] On the other hand, as Figure 15 indicated, when the staple cartridge 500 is mounted on the first jaw 111, the first elastic member 130 can be elastically deformed to release the restriction of the movement of the working member 120.

[0139] The first elastic member 130 can have a first extension 133 extending from one side of the seating portions 131. A portion of the first extension 133 can be in contact with a guide surface 513 inclined toward one side of the staple cartridge 500 when the staple cartridge 500 is mounted on the first jaw 111.

[0140] The first extension 133 can be elastically deformed, so that the cartridge 500 mounted on the first jaw 111 can push the first extension 133 upward. Specifically, a portion of the first extension 133 can be formed in a shape bent at a predetermined angle with respect to the seating portion 131. Since the portion of the first extension 133 has the predetermined angle with respect to the seating portion 131, a free space can be formed between the first jaw 111 and the first extension 133. When the cartridge 500 is mounted on the first jaw 111, it is easily mounted on the first jaw 111 through the free space, and at the same time, the first extension 133 can be pushed upward from the lower side of the first extension 133.

[0141] The first extension 133 is elastically deformed in a state of being in contact with the guide surface 513, at which time the position of the locking flange 132 can be changed. As shown in Figure 15 When the position of the locking flange 132 is raised, the engagement between the locking flange 132 and the locking protrusion 122 is released, so that the working member 120 can be moved forward. In other words, the forward movement path of the locking protrusion 122 is opened while the position of the locking flange 132 is changed, so that the working member 120 can be moved forward.

[0142] In addition, the first extension 133 is in contact with the guide surface 513 of the cartridge 500, and by the reaction of the force of the cartridge 500 pushing the first extension 133 upward, the cartridge 500 can be pushed toward the distal end portion 102 of the end tool 100. When the first extension 133 pushes the cartridge 500 toward the distal end portion 102 of the end tool 100, the coupling protrusion 514 disposed adjacent to the distal end portion 102 of the end tool 100 is inserted into the first groove (not shown) of the first jaw 111, so that the cartridge 500 can be stably mounted on the first jaw 111.

[0143] The first elastic member 130 can further have a second extension 134 extending from the other side of the seating portion 131. The second extension 134 is bent and extends at the other side of the seating portion 131, and an end portion 134a is contactable with the second jaw 112.

[0144] In a state in which the end portion 134a of the second extension 134 is in contact with the second jaw 112, the first elastic member 130 can provide a restoring force in a direction in which the first jaw 111 and the second jaw 112 move away from each other. The first elastic member 130 prevents the second jaw 112 from moving toward the first jaw 111 due to gravity, whereby the first jaw 111 and the second jaw 112 maintain a state of being normally open, so that a body tissue can be easily interposed in the end tool 100.

[0145] The first elastic member 130 may include a pair of first extensions 133 and a pair of second extensions 134. The pair of first extensions 133 and the pair of second extensions 134 are respectively provided on both sides of the main body 121 of the working member 120 and can be elastically deformed in a state of stable engagement with the working member 120.

[0146] Figure 16 FIG. 1 is a schematic diagram of a working member 120' and a first elastic member 130' according to another embodiment of the present invention. Figure 12 and Figure 13 Compared with the embodiment, Figure 16 The working member 120' and the first elastic member 130' have some modified shapes to limit the movement of the working member 120'. The modified shapes will be described in detail below. For the description of the main body 121', the blade 123' or the seating portion 131', the first extension portion 133' and the second extension portion 134' of the working member 120', reference will be made to Figure 12 and Figure 13 The contents described in the embodiments of the present invention.

[0147] See also Figure 16 The working member 120' has a locking protrusion 122', and the first elastic member 130' may have a locking groove 135' corresponding to the locking protrusion 122'. The first elastic member 130' can restrict the movement of the working member 120' by engaging the locking groove 135' with the locking protrusion 122'. In addition, when the first elastic member 130' elastically deforms, the position of the locking groove 135' changes, and the restriction on the movement of the working member 120' caused by the engagement with the locking protrusion 122' can be released.

[0148] As described above, the locking protrusion 122' of the working member 120' can protrude from one side of the working member 120'. Alternatively, the locking protrusion 122' can protrude from both sides of the main body 121' of the working member 120' and can be provided as a pair. Thus, the number, position, and shape of the locking protrusions 122' can be set in various ways, and the number, position, and shape of the locking grooves 135' can also be set accordingly.

[0149] Thus, the end tool 100 of the surgical instrument 10 of the present invention includes the first elastic member 130, and when the staple cartridge 500 is not mounted on the first jaw 111, the movement of the working member 120 can be restricted. In the first elastic member 130, the first extension portion 133 contacts the staple cartridge 500 and elastically deforms, thereby releasing the restriction on the movement of the working member 120 when the staple cartridge 500 is mounted on the first jaw 111.

[0150] In addition, a portion of the first elastic member 130 is in contact with the cartridge 500 and pushes the cartridge 500 toward the distal end portion 102 of the end tool 100, so that the cartridge 500 can be more stably installed in the first jaw 111. In addition, one end of the first elastic member 130 is fixed to the second jaw 112, so that the first jaw 111 and the second jaw 112 can be maintained in a state of being normally opened.

[0151] Second mechanism of the lockout system

[0152] Figure 17 The second elastic member 560 of the cartridge 500 according to an embodiment of the present application is illustrated in FIG. 6. Figure 2 A perspective view of the second elastic member 560 of the cartridge 500 according to an embodiment of the present application is illustrated in FIG. 7. Figure 18 A perspective view of the second elastic member 560 of the cartridge 500 according to an embodiment of the present application is illustrated in FIG. 7. Figure 17 A perspective view of the second elastic member 560 of the cartridge 500 according to an embodiment of the present application is illustrated in FIG. 7. Figure 19 A perspective view of the second elastic member 560 of the cartridge 500 according to an embodiment of the present application is illustrated in FIG. 7. Figure 17 A perspective view of the second elastic member 560 of the cartridge 500 according to an embodiment of the present application is illustrated in FIG. 7. Figure 20 A perspective view of the second elastic member 560 of the cartridge 500 according to an embodiment of the present application is illustrated in FIG. 7. Figure 17 A perspective view of the second elastic member 560 of the cartridge 500 according to an embodiment of the present application is illustrated in FIG. 7.

[0153] Referring to FIG. 6, the cartridge 500 of the surgical instrument 10 according to an embodiment of the present application can have a second elastic member 560. The second elastic member 560 can be provided on the cartridge 500 to limit the movement of the working member 120 according to the position of the wedge 550. Figures 17 to 20 The shape of the second elastic member 560 and the arrangement relationship thereof with the wedge 550 will be described below, and a second mechanism of a lockout system for preventing the working member 120 from moving forward will be described in detail.

[0154] First, referring again to FIG. 6,

[0155] The wedge 550 can have a base plate 551, a guide plate 552, and a lead-out plate 553. The wedge 550 is provided inside the housing 520, a portion thereof is in contact with the working member 120 and moves forward together with the working member 120 inside the housing 520, and can discharge the staples 530 to the outside of the housing 520. That is, the wedge 550 can move from the proximal end portion to the distal end portion of the housing 520, and the initial position of the wedge 550 can be a point in the proximal end portion of the housing 520. Figure 4 The base plate 551 forms the base of the wedge 550, and one side thereof can be in contact with the working member 120. The guide plate 552 can protrude from the base plate 551, and the lead-out plate 553 can be provided on both sides of the guide plate 552.

[0156]

[0157] ​The lead-out plate 553 can have a predetermined inclined surface. That is, the lead-out plate 553 can have an inclined surface 553a formed such that the height of the proximal end portion 501 of the cartridge 500 is higher than the height of the distal end portion 502. At this time, the inclined surface 553a of the lead-out plate 553 can be formed as an inclined surface having a single inclination, or can be formed by connecting inclined surfaces having different inclinations. Thereby, when the wedge 550 moves forward by the operation of the working member 120, the lead-out plate 553 pushes up the staples 530 or the lead-out member 540 by the inclined surface 553a, thereby performing a staple suturing operation.

[0158] The lead-out plate 553 can be spaced apart at both sides with the guide plate 552 as a center, forming a pair of first gaps 555. The first gaps 555 of the wedge 550 provide a space through which the second elastic members 560 can be elastically deformed and pass.

[0159] On the other hand, referring to Figures 17 to 19 , the second elastic members 560 are provided on the cover 510 and can engage with the working member 120 to restrict the forward movement of the working member 120 when the wedge 550 is deviated from the initial position as the wedge 550 moves forward. The second elastic members 560 can have deformation portions 561 and fixing portions 562.

[0160] The deformation portions 561 of the second elastic members 560 can be elastically deformed and cross and engage with each other. At this time, the end portions 561a of the deformation portions 561 can be formed as curved surfaces.

[0161] As shown in Figure 17 , the end portions 561a of the deformation portions 561 of the second elastic members 560 can be cut and cross each other. In addition, when the deformation portions 561 of the second elastic members 560 are elastically deformed to have a predetermined gap, a restoring force can be provided in a direction in which they face each other.

[0162] The fixing portions 562 of the second elastic members 560 are spaced apart at a predetermined interval and can be inserted into the second grooves 515 of the cover 510. That is, the second elastic members 560 are fixed to the cover 510 by the fixing portions 562, and the deformation portions 561 bent at the fixing portions 562 are elastically deformed, thereby making it possible to restrict the forward movement of the working member 120.

[0163] The second elastic members 560 can be provided in pairs on the cover 510, as shown in Figures 17 to 20 . But not limited thereto, the second elastic members 560 can be formed as one member having the deformation portions 561 and the fixing portions 562. That is, the second elastic members 560 can be provided in various shapes, types, and numbers, as long as they can be elastically deformed and restrict the forward movement of the working member 120.

[0164] Hereinafter, the forward movement of the working member 120 and a method of limiting the forward movement of the working member 120 according to the stapling operation process of the surgical instrument 10 will be described.

[0165] Before the suture staples 530 of the staple cartridge 500 are drawn out, the wedge 550 is disposed at the proximal end 501 of the staple cartridge 500 in contact with the working member 120. Figure 18 and Figure 19 As shown, the pair of second elastic members 560 can be elastically deformed by the deformation portions 561 and disposed in the first gap 555 of the wedge 550. In other words, when the wedge 550 is placed in the initial position, the pair of second elastic members 560 can be disposed such that the deformation portions 561 are supported on both side walls of the guide plate 552 of the wedge 550 with a predetermined gap therebetween.

[0166] The wedge 550 can be advanced toward the distal end 502 of the staple cartridge 500 via the working member 120 and eject the staples 530. At this time, because the deformed portions 561 of the second elastic members 560 disposed in the first gap 555 are elastically deformable, the wedge 550 and the working member 120 can pass between the pair of second elastic members 560 and advance. As the wedge 550 advances and deviates from its initial position, when the deformed portions 561 of the pair of second elastic members 560 are no longer supported by the side walls of the guide plate 552, the deformed portions 561 of the pair of second elastic members 560 provide a restoring force in the directions facing each other, allowing the ends 561a to cross each other again.

[0167] After the wedge 550 moves forward and performs the stapling action, the working member 120 moves backward toward the proximal end portion 101 of the end tool 100, and the wedge 550 remains at the distal end portion 502 of the staple cartridge 500. When the working member 120 moves backward, the deformed portions 561 of the pair of second elastic members 560 can be elastically deformed to provide a backward movement path for the working member 120, and when the working member 120 passes between the second elastic members 560, the deformed portions 561 provide a restoring force in the directions facing each other, so that the ends 561a can cross each other again.

[0168] Thus, when the suture staples 530 are no longer present inside the housing 520, Figure 20 As shown, only the working member 120 returns to the proximal end portion 101 of the end tool 100, while the wedge 550 does not return to the proximal end portion 501 of the staple cartridge 500. That is, after the staples 530 are drawn out, as the wedge 550 deviates from the initial position, the deformed portion 561 of the second elastic member 560 cannot be supported on the side walls of the guide plate 552 of the wedge 550, and the ends 561a may be arranged to cross each other.

[0169] Therefore, when the working member 120 is to be moved forward again after the staples 530 are ejected, the deformed portions 561 of the second elastic members 560 remain in a state of crossing each other, so that the working member 120 can be restricted from moving forward. In particular, the end portions 561a of the deformed portions 561 can be formed in a curved surface, and the contact portions 121b of the main body 121 which can contact the end portions 561a of the deformed portions 561 when the working member 120 moves forward can also have a predetermined curvature. Thus, even if the working member 120 moves forward after the staples 530 are ejected and contacts the deformed portions 561 of the second elastic members 560, the working member 120 can be prevented from passing between the pair of second elastic members 560.

[0170] Thus, in the surgical instrument according to an embodiment of the present application, the end tool has the first elastic member which can restrict the working member from moving forward when the cartridge is not placed in the first jaw. Also, in the surgical instrument according to an embodiment of the present application, the cartridge has the second elastic member which can restrict the working member from moving forward even if the cartridge is placed in the first jaw if the staples have been ejected.

[0171] Thus, the present application provides a surgical instrument which improves safety and usability by implementing a lockout system which prevents the working member from moving forward and cutting a body tissue when a staple is not placed on the surgical instrument.

[0172] Preferred embodiments of the present application are described herein. It should be apparent to those skilled in the art that the application can be embodied in other forms without departing from the spirit or essential characteristics thereof. The presently disclosed embodiments are therefore considered to be illustrative and not restrictive, and the scope of the application is not to be determined by such exemplary embodiments. Rather, the scope of the application is to be determined by the appended claims, and their equivalents.

[0173] The surgical instrument according to the present application is advantageous in that, if a cartridge is not placed, or a cartridge without a staple is placed, so that a situation in which a cut site cannot be stapled because of the absence of a staple occurs, by including a structure which prevents the working member from moving forward and cutting a body tissue, safety and usability of the surgical instrument can be improved.

[0174] It should be understood that the embodiments described herein should be considered in a descriptive sense only and not for purposes of limitation. Descriptions of features or aspects within each embodiment should typically be considered as being applicable to other embodiments. While one or more embodiments have been described with reference to the attached drawings, it will be apparent to those skilled in the art that various changes in form and detail can be made therein without departing from the spirit and scope of the claims.

[0175] Reference Signs

[0176] 10: surgical instrument

[0177] 100: end tool

[0178] 110: jaw unit

[0179] 120: working member

[0180] 130: first elastic member

[0181] 200: operation section

[0182] 400: connection section

[0183] 500: cartridge

[0184] 510: lid

[0185] 520: housing

[0186] 530: staple

[0187] 540: lead-out member

[0188] 550: wedge

[0189] 560: second elastic member

Claims

1. A surgical instrument comprising a tip tool rotatable in at least one direction, the tip tool comprising: a jaw unit having a first jaw configured to accommodate a cartridge and a second jaw opposite to the first jaw; a working member configured to be movable in a length direction of the first jaw; and a first elastic member provided at a proximal end portion of the first jaw and configured to restrict movement of the working member depending on whether or not the first jaw accommodates the cartridge, wherein, when the cartridge is placed in the first jaw, one end of the first elastic member is supported by the cartridge and elastically deformed, so that the first elastic member releases the restriction on the movement of the working member.

2. The surgical instrument according to claim 1, wherein the working member comprises: a locking protrusion protruding from one side of a main body and configured to restrict movement of the working member when the cartridge is not placed in the first jaw.

3. The surgical instrument according to claim 2, wherein the working member has a first slit formed by cutting a portion of the main body, and the locking protrusion protrudes from the main body toward the first slit.

4. The surgical instrument according to claim 3, wherein the first elastic member comprises: a locking flange provided at the first slit and configured to restrict movement of the working member by engaging with the locking protrusion when the cartridge is not placed in the first jaw.

5. The surgical instrument according to claim 4, wherein when the cartridge is placed in the first jaw, a position of the locking flange is changed due to elastic deformation of the first elastic member, so that the restriction on the movement of the working member due to engagement between the locking flange and the locking protrusion is released, and the working member becomes movable to advance toward a distal end portion of the first jaw.

6. The surgical instrument according to claim 2, wherein the first elastic member comprises: a locking groove corresponding to the locking protrusion and configured to restrict movement of the working member by engaging with the locking protrusion when the cartridge is not placed in the first jaw.

7. The surgical instrument according to claim 6, wherein the locking groove is recessed in one side of a seating portion of the first elastic member, the seating portion being seated on the first jaw.

8. The surgical instrument according to claim 6, wherein when the cartridge is placed in the first jaw, a position of the locking groove is changed due to elastic deformation of the first elastic member, so that the restriction on the movement of the working member due to engagement between the locking flange and the locking protrusion is released, and the working member becomes movable to advance toward a distal end portion of the first jaw.

9. The surgical instrument according to claim 1, wherein the first elastic member comprises: a first extension portion configured to be elastically deformed in contact with a guide surface inclined at one side of the cartridge.

10. The surgical instrument according to claim 9, wherein ​ The first elastic member further includes: a seating portion configured to be seated on the first jaw; and a second extension portion bent from the seating portion, and a portion thereof is configured to be in contact with the second jaw.

11. The surgical instrument according to claim 10, wherein the first extension portion is inclined, and a portion of the first extension portion forms a predetermined angle with the seating portion.

12. The surgical instrument according to claim 10, wherein the second extension portion is provided between the second jaw and the working member, and is configured to limit the rotation of the second jaw.

13. A surgical instrument comprising: a tip tool rotatable in at least one direction; and a cartridge configured to be mounted on the tip tool, the tip tool comprising: a jaw unit having a first jaw configured to accommodate a cartridge and a second jaw opposite to the first jaw; and a working member configured to be movable in a length direction of the first jaw, the cartridge comprising: a housing accommodating a plurality of suturing staples; a wedge configured to lead out the plurality of suturing staples as moving from a proximal end to a distal end of the housing when the working member is moved; and a second elastic member provided to the housing and having an elastically deformable deformation portion, the second elastic member limiting the movement of the working member according to a position of the wedge.

14. The surgical instrument according to claim 13, wherein the second elastic member includes a pair of second elastic members, and the deformation portions are configured to provide a restoring force to each other.

15. The surgical instrument according to claim 14, wherein the deformation portions of the pair of second elastic members are provided to intersect each other when the wedge is deviated from an initial position.

16. The surgical instrument according to claim 13, wherein the housing includes a second groove for fixing the second elastic member, and the second elastic member further includes a fixing portion bent from the deformation portion and configured to be independently inserted into the second groove.

17. The surgical instrument according to claim 13, wherein the wedge includes: a base plate; a guide plate provided to protrude from the base plate; and a leading plate provided on the base plate and spaced apart from each other on opposite sides of the guide plate, forming a pair of first gaps.

18. The surgical instrument according to claim 17, wherein the second elastic member is independently seated in the pair of first gaps when the wedge is placed in an initial position.

19. The surgical instrument according to claim 17, wherein the second elastic member is provided such that the deformation portions are spaced apart from each other by a predetermined interval of the guide plate of the wedge when the wedge is placed in an initial position.

20. A cartridge of a surgical instrument, wherein the surgical instrument includes a tip tool rotatable in at least one direction, and a working member movable in a length direction, the cartridge of the surgical instrument comprising: a housing accommodating a plurality of suturing staples; a wedge configured to lead out the plurality of suturing staples as moving from a proximal end to a distal end of the housing when the working member is moved; and a second elastic member provided to the housing and having an elastically deformable deformation portion, the second elastic member limiting the movement of the working member according to a position of the wedge. a housing that houses a plurality of staples; a wedge configured to cause the plurality of staples to be ejected from the housing as the working member moves from a proximal end to a distal end of the housing; and a second elastic member provided to the housing and having an elastically deformable deformation portion, the second elastic member is configured to limit movement of the working member according to a position of the wedge.

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