CN116172635A - Swing head mechanism and surgical stapler - Google Patents

Abstract

The present application provides a swing head mechanism and a surgical stapler. The swing head mechanism includes: for surgical staplers, the swing head mechanism includes a driving part and a swing head pull rod, and the drive part is configured to drive the swing head pull rod along the direction of the stapler when rotating Axial movement, the swing head mechanism also includes: a locking part, which is movably arranged on the outside of the driving part. When the locking part is in the first position, the locking part blocks the rotational movement of the driving part, and the locking part is in the second position When the drive member can be driven to rotate, the first position is closer to the drive member than the second position; the first matching member is configured to be operated to drive the locking member from the first position to the second position. The design space of the clamping part of the swinging head mechanism of the present application is more sufficient, and the size of the clamping part can be designed more reasonably to ensure sufficient strength, so that when a large firing force is applied for thicker tissue anastomosis, it can also be used. Keep the locking of the swing angle to ensure the smooth progress of the operation and improve the doctor's confidence.

Description

Swing head mechanism and surgical stapler

technical field

The present application relates to the technical field of medical devices, in particular to a head swing mechanism and a surgical stapler.

Background technique

In the prior art, a surgical stapler includes a stapler body and an end effector matched with the stapler body. In order to meet the needs of more surgical scenarios, it is required that the end effector can have more angle options relative to the stapler body. Therefore, a swing head mechanism can be provided, which is connected to the end effector through a swing head pull rod. When the swing head mechanism drives the swing head pull rod to move along the axial direction of the stapler, the distal side of the swing head pull rod drives the end effector. The device swings clockwise or counterclockwise relative to the stapler body.

In the existing head swing mechanism, after the end effector swings to a required angle, the end effector is kept at the current angle by a locking mechanism. Every time the swing mechanism is operated to make the end effector swing, it is necessary to drive the swing rod to move axially while overcoming the force of the locking mechanism. Therefore, not only does the operator need to apply a large force every time, the user experience is poor, but also the locking effect is poor, and it often happens that the end effector cannot continue to be kept at a specific swing angle due to the failure of the locking mechanism.

In this application, the distal side and the proximal side are relative to the operator, the end closer to the operator is the proximal side, and the end farther away from the operator, that is, the end closer to the surgical site is the far side. end side.

Contents of the invention

In view of the problems in the prior art, the purpose of this application is to provide a swing head mechanism and a surgical stapler. When it is necessary to control the swing of the end effector, first operate the first fitting to drive the locking member from the first position to the second position , so as not to block the rotation of the driving part, thereby avoiding damage to the clamping part when the driving part rotates.

An embodiment of the present application provides a head swing mechanism for a surgical stapler. The head swing mechanism includes a driving member and a head swing rod. axial movement, the swing head mechanism also includes:

The locking part is movably arranged on the outside of the driving part. When the locking part is in the first position, the locking part blocks the rotation of the driving part. The locking part is in the second position , the driving member can be driven to rotate, and the first position is closer to the driving member than the second position;

The first matching part is configured to be operated to drive the locking part to enter the second position from the first position.

In some embodiments, the driving part and the first matching part are coaxially arranged in the installation hole formed by the first casing of the surgical stapler, and the side wall of the installation hole is circular with a notch. , the locking member can be movably arranged at the position of the notch.

In some embodiments, the inside of the notch is provided with a first guide part, and the locking part is provided with a second guide part, and the first guide part guides the card by cooperating with the second guide part. movement of a position member between said first position and said second position.

In some embodiments, it also includes a support, the support is at least partially supported on the outer periphery of the installation hole and at least partially covers the locking member, and the support is provided on one side facing the locking member. The clamping component limiting hole, the clamping component is at least partially located in the clamping component limiting hole.

In some embodiments, it further includes a second fitting, the second fitting is connected to the driving member in a non-rotatable connection, and when the locking member is in the first position, the locking member at least The part is against the second fitting to block the rotation of the second fitting.

In some embodiments, the locking member includes a first matching portion, and a first groove is provided on the side of the first matching member, and when the locking member is in the first position, the first matching portion at least partially into the first groove.

In some embodiments, the locking part further includes a second matching part, and the side of the second matching part is provided with a second groove. When the locking part is in the first position, the second matching part portion at least partially into the second slot.

In some embodiments, there is a first angle between the first groove walls of each of the first grooves, and a second angle between the second groove walls of each of the second grooves, and the first angle is larger than the a second angle; or, the depth of the first groove is smaller than the depth of the second groove.

In some embodiments, the driver includes a drive shaft and a driver body, the second fitting and the first fitting are sequentially disposed on the first side of the driver body, and the first fitting The member is rotatable relative to the drive shaft.

In some embodiments, both the first fitting and the second fitting are disc-shaped sleeved on the outside of the drive shaft, and the first fitting is disposed on a side facing the locking member. There are a plurality of the first grooves distributed along the circumferential direction, and a plurality of the second grooves distributed along the circumferential direction are provided on the side of the second matching part facing the locking part.

In some embodiments, the width of the first fitting portion of the locking member is greater than the width of the second fitting portion, and/or, the end of the first fitting portion is smaller than the end of the second fitting portion. The end is closer to the drive shaft.

In some embodiments, an operating member is further included, and the operating member is configured to drive the first matching member to rotate and drive the locking member to enter the second position from the first position when the operating member is rotated by a first stroke. position, when the operating member continues to rotate for a second stroke, the driving member is driven to rotate through the second matching member.

In some embodiments, it also includes a first pin shaft, the operating part is provided with a first mounting hole, the first fitting part is provided with a second mounting hole, and the second fitting part is provided with a third mounting hole, The first pin shaft is sequentially passed through the first mounting hole, the second mounting hole and the third mounting hole, and the circumferential length of the third mounting hole is greater than that of the first pin shaft. outside diameter.

In some embodiments, a support is further included, the support is provided with an arc-shaped rotation limiting hole, and the first pin shaft is passed through the rotation limiting hole.

In some embodiments, when the operating member is configured to rotate by a first stroke, the first pin moves from a third relative position to a fourth relative position relative to the driving member;

The swing mechanism further includes an elastic member configured to give the first pin a biasing force to move from the fourth relative position to the third relative position.

The embodiment of the present application also provides a surgical stapler, including the above-mentioned head swing mechanism. The embodiment of the present application also provides a surgical stapler, including the above-mentioned head swing mechanism.

The head swing mechanism and surgical stapler provided by this application have the following advantages:

By adopting this application, when it is necessary to control the swing of the end effector, first operate the first fitting to drive the locking element from the first position to the second position, so as not to block the rotation of the driving element, thereby avoiding the locking element when the driving element rotates cause damage, and in the process of rotation of the driving member, there is no interference blocking of the clamping member, so that the swing of the end effector is smoother. The clamping part can be movably arranged on the outside of the driving part, and the internal structure of the swing head mechanism can be arranged more conveniently without affecting the structure and strength of the driving wheel itself, and the design space of the clamping part is more convenient. Sufficient, the size of the clamping part can be designed more reasonably to ensure sufficient strength, so that when a large firing force is applied for thick tissue anastomosis, the locking of the swing angle can also be maintained to ensure the smooth progress of the operation and improve the efficiency of the doctor. confidence.

Further, since the locking element can be movably arranged on the outside of the driving element, the design space of the locking element is more sufficient, so that the length of the second matching part of the locking element can be designed to be relatively longer, and the corresponding second The depth of the second groove of the matching part is designed to be relatively deeper, so that the locking effect is better, and it is more suitable for operations that require greater firing force.

Description of drawings

Other features, objects and advantages of the present application will become more apparent by reading the detailed description of non-limiting embodiments with reference to the following drawings.

Fig. 1 is a schematic diagram of the cooperation between the swing head mechanism and the casing according to an embodiment of the present application;

Fig. 2 is a schematic structural view of an operating part according to an embodiment of the present application;

Fig. 3 is a structural schematic diagram of cooperation between the swing head mechanism and the first housing without the operating part according to an embodiment of the present application;

Fig. 4 is a top view of the cooperation between the swing head mechanism and the first housing, omitting the operating part and the support, according to an embodiment of the present application;

Fig. 5 is a structural schematic diagram of cooperation between the swing head mechanism and the first housing, omitting the operating part and the support, according to an embodiment of the present application;

Figure 6 and Figure 7 are schematic diagrams of the cooperation between the support and other components according to an embodiment of the present application;

Fig. 8 is a schematic structural view of a support according to an embodiment of the present application;

Fig. 9 is a structural schematic diagram of the cooperation between the swing head mechanism and the first housing according to an embodiment of the present application;

Fig. 10 is a schematic structural view of a driving swing head pull rod according to an embodiment of the present application;

Fig. 11 is a schematic diagram of the cooperation between the locking member and other components according to an embodiment of the present application;

Fig. 12 is a combined schematic diagram of various components of the swing head mechanism according to an embodiment of the present application;

Fig. 13 is a schematic diagram of the cooperation between the locking part and the second matching part according to an embodiment of the present application;

Fig. 14 is a schematic structural diagram of a locking member according to an embodiment of the present application;

Fig. 15 is a schematic diagram of the structure of the cooperation between the first housing and the locking member according to an embodiment of the present application;

Fig. 16 is a partial top view of the head swing mechanism according to an embodiment of the present application;

Fig. 17 is a partial front view of a head swing mechanism according to an embodiment of the present application;

Fig. 18 is a sectional view along A-A direction in Fig. 17 .

Reference signs:

1 operating part (knob) 531 first anti-rotation structure

11 Operator 6 Drive

12 First mounting hole 53 Third mating hole

13 First mating hole 61 Drive shaft

2 The first matching part 611 The second anti-rotation structure

21 First slot 62 Driver body

211 First groove wall 71 Swing head connecting rod

23 Second mounting hole 711 Waist hole

24 Second matching hole 72 Swing head rod

3 Locking piece 73 The first pin shaft

31 First mating part 81 First housing

32 Second mating part 811 Mounting hole

33 Second guide part 812 Notch

34 Fitting part of elastic member 813 First guide part

41 First elastic member 82 Second housing

42 Second elastic member 83 Sleeve

43 First pin 9 support

5 Second mating part 91 Accommodating groove

51 The second slot 92 Limiting hole for clamping part

511 Second groove wall 93 Shaft hole

52 Third mounting hole 94 Rotation limit hole

Detailed ways

Example embodiments will now be described more fully with reference to the accompanying drawings. Example embodiments may, however, be embodied in many forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this application will be thorough and complete, and will fully convey the concept of example embodiments to those skilled in the art. The same reference numerals denote the same or similar structures in the drawings, and thus their repeated descriptions will be omitted. "Or" and "or" in the specification may mean "and" or "or". Although the terms "above," "below," "between," etc. may be used in this specification to describe various exemplary features and elements of the present application, these terms are used herein for convenience only, for example according to the directions for the example described above. Nothing in this specification should be construed as requiring a particular three-dimensional orientation of structures in order to fall within the scope of this application. Although "first" or "second" etc. are used to indicate some features in this specification, they are only used for denotation and not as limitations on the quantity and importance of specific features.

The present application provides a head swing mechanism for a surgical stapler and a surgical stapler including the head swing mechanism. The surgical stapler includes a stapler body and an end effector matched with the stapler body. The swing head mechanism includes a driving part and a swing head pull rod, the drive part is configured to drive the swing head pull rod to move along the axial direction of the stapler when rotating, and the axial movement of the swing head pull rod can drive the The end effector swings laterally relative to the stapler body.

The head swing mechanism also includes a locking part and a first matching part. When the locking member is in the first position, the locking member blocks the rotation of the driving member and locks the end effector at the current position. When the locking member is in the second position, the driving member can be driven to rotate, and the first position is closer to the driving member than the second position. The first matching part is configured to be operated to drive the locking part to enter the second position from the first position, so that the locking part is unlocked from the driving part, and the driving part and the driving part can be sequentially passed. The above-mentioned oscillating head rod realizes the swing of the end effector, avoiding damage to the clamping component when the driving component rotates, and during the rotation of the driving component, there is no interference of the clamping component, so that the swing of the end effector is smoother. The locking part can be movably arranged on the outside of the driving part, the internal structure of the swing head mechanism can be arranged more conveniently, and the structure and strength of the driving wheel itself will not be affected, and the design space of the locking part is larger. Sufficient, the size of the clamping part can be designed more reasonably to ensure sufficient strength, so that when a large firing force is applied for thick tissue anastomosis, the locking of the swing angle can also be maintained to ensure the smooth progress of the operation and improve the efficiency of the doctor. confidence.

The structure of the head swing mechanism in each specific embodiment of the present application will be described in detail below in conjunction with the accompanying drawings. It should be understood that the specific embodiments are not intended to limit the scope of protection of the present application.

In this embodiment, the surgical stapler includes a stapler body and an end effector cooperating with the stapler body. As shown in Figure 1, the stapler body includes a sleeve 83 extending axially along the stapler, and the inside of the sleeve 83 is provided with a swing head pull rod 72 extending axially along the stapler ( 4), the distal end of the swing head rod 72 is connected to the end effector. As shown in FIGS. 1-5 , the swinging head mechanism includes a housing, and the housing includes a first housing 81 located above and a second housing 82 located below. A circular installation hole 811 is defined on the upper surface of the first housing 81 . As shown in FIG. 1 and FIG. 2 , a knob-shaped operating member 1 is arranged on the top of the first housing 81 to drive the internal structure of the first housing 81 (the specific working principle will be introduced below). The operating part 1 includes an operating part 11 through which the user can drive the operating part 1 to rotate relative to the first housing 81 , and the bottom of the operating part 1 is provided with a first matching hole 13 . As shown in FIG. 3 , a support 9 is further provided between the operating member 1 and the first housing 81 , and the support 9 is fixed relative to the first housing 81 and cannot rotate. The upper surface of the support 9 is in contact with the lower surface of the operating member 1 , and the lower surface of the support 9 is in contact with the outer edge of the opening of the installation hole 811 .

As shown in FIGS. 3 to 10 , the swing head mechanism further includes a drive member 6 and a swing head connecting rod 71 , the drive member 6 is located in the mounting hole 811 of the first housing 81 , and the swing head connecting rod 71 cooperates with the bottom of the driving member 6 , and the swing head connecting rod 71 is connected to the proximal end of the swing head pull rod 72 . As shown in FIGS. 3-7, the driving member 6 includes a driving shaft 61 and a disc-shaped driving member body 62, and the top end of the driving shaft 61 is at least partially located in the first matching hole 13 of the driving member 6 (shown in FIG. As shown in FIG. 2 ), it is rotatable relative to the first fitting hole 13 . As shown in Figures 9 and 10, the swing head connecting rod 71 is provided with a waist-shaped hole 711, and the driver body 62 is provided with a second pin shaft 73, and the second pin shaft 73 is passed through the waist-shaped hole 711 , realizing the eccentric connection between the swing head connecting rod 71 and the driver body 62, through this eccentric connection structure, the rotational movement of the drive member body 62 can be converted into the axial movement of the swing head connecting rod 71 . Therefore, when the driving member 6 rotates, it can drive the swing head connecting rod 71 to move along the axial direction of the stapler, and the swing head connecting rod 71 drives the swing head pull rod 72 to move along the axial direction of the stapler. movement, thereby adjusting the lateral swing angle of the end effector.

In this application, the distal side and the proximal side are relative to the operator, the side closer to the operator is the proximal side, and the side farther away from the operator is the side closer to the surgical site. The side is the distal side, and the direction along the axis of the stapler is the axial direction, that is, the direction from the distal side to the proximal side of the stapler, or the direction from the proximal side to the distal side of the stapler. In the viewing angle of FIG. 1 , the S1 direction is the direction from the distal side to the proximal side, and the S1 direction or the direction opposite to S1 is the axial direction. In the viewing angle of FIG. 4 , the S3 direction is the transverse direction, that is, the width direction. In the viewing angle of FIG. 12 , the S2 direction is the longitudinal direction, that is, the height direction. In this application, for a component, the inner side and the outer side are relative to the center of the component, the side close to the center is the inner side, and the side away from the center is the outer side.

As shown in FIGS. 4-7 , in order to lock the position of the driving member 6 . The head swing mechanism also includes a locking part 3 , a first fitting part 2 and a second fitting part 5 . In this embodiment, both the second fitting 5 and the first fitting 2 are disc-shaped, and the second fitting 5 and the first fitting 2 pass through the drive Shaft 61. The first fitting 2 is rotatable relative to the driving shaft 61 . The second matching part 5 is non-rotatable relative to the driving shaft 61 . As shown in FIG. 12 , a second matching hole 24 is provided inside the first fitting part 2 . A third matching hole 53 is defined inside the second fitting part 5 . S0 in FIG. 12 represents the axial direction of the drive shaft 61 . The second fitting hole 24 is a round hole, and the inner diameter of the second fitting hole 24 is greater than or equal to the maximum outer diameter of the drive shaft 61 , so that the first fitting 2 can be positioned relative to the drive shaft 61 rotate. The inner surface of the third matching hole 53 is provided with a first anti-rotation structure 531 , and the outer surface of the drive shaft 61 is provided with a second anti-rotation structure 611 . The first anti-rotation structure 531 and the second anti-rotation structure 611 form an embedded fit, so that the second fitting part 5 is non-rotatable relative to the driving shaft 61 . When the second matching part 5 rotates, the second matching part 5 drives the driving part 6 to rotate as a whole. As shown in Figures 6-8, the support 9 is provided with a receiving groove 91, the first fitting 2 is at least partly located inside the receiving groove 91, and the second fitting 5 is located on the support 9. below. A shaft hole 93 is opened at the center of the support 9 . The shaft hole 93 is a circular hole, and the inner diameter of the shaft hole 93 is greater than or equal to the maximum outer diameter of the driving shaft 61 , so that the driving shaft 61 can rotate relative to the support 9 .

The locking member 3 is movably arranged on the outside of the driving member 6, and can move between a first position close to the driving member 6 and a second position away from the driving member 6. For example, the positioning member 3 can move back and forth along the radial direction of the driving member 6 to move away from and approach to the driving member 6 . As shown in Figure 5, a notch 812 is provided on one side of the installation hole 811 of the first housing 81, the side wall of the installation hole 811 is circular with a notch 812, and the locking member 3 is movably set. at the position of the notch 812 . The support 9 is at least partly supported on the outer periphery of the mounting hole 811 and at least partially covers the locking member 3 , and the side of the support 9 facing the locking member 3 is provided with a locking member limiting hole 92 , the locking member 3 is at least partially located in the limiting hole 92 of the locking member. The side of the retaining member 3 away from the driving member 6 is provided with an elastic member matching portion 34, and the elastic member matching portion 34 cooperates with the first elastic member 41, and the first elastic member 41 is, for example, a compression spring. When the retaining member 3 is driven to enter the second position from the first position, the retaining member 3 drives the first elastic member 41 to elastically deform, and the retaining member 3 is subjected to an external After the driving force is eliminated, under the elastic deformation restoration force of the first elastic member 41 , the locking member 3 can return from the second position to the first position. The first elastic member 41 may also be an elastic structure such as a tension spring or an elastic sheet arranged at other positions.

As shown in FIG. 11 and FIG. 12 , the locking member 3 includes a first fitting portion 31 and a second fitting portion 32 . The side of the first fitting 2 is provided with a plurality of first slots 21 distributed along the circumferential direction, and the side of the second fitting 5 is provided with a plurality of second slots 51 distributed along the circumferential direction. When the engaging member 3 is in the first position, the first matching portion 31 at least partially enters the first slot 21 , and the second matching portion 32 at least partially enters the second slot 51 . Therefore, when the retaining member 3 is in the first position, the second matching portion 32 of the retaining member 3 blocks the rotation of the second engaging member 5, so that the driving member 6 cannot rotate to drive The axial movement of the swing head connecting rod 71 locks the end effector at its current position, maintaining the angular stability of the end effector during use. When the first matching part 2 is configured to be operated and rotated, the first groove wall 211 of the first groove 21 of the first matching part 2 is opposed to the first matching part 31 and drives the card. The positioning part 3 moves from the first position to the direction away from the driving part 6 and enters the second position, so that the locking part 3 and the driving part 6 are unlocked, and the driving part 6 and the driving part 6 can be sequentially passed. The swing head connecting rod 71 realizes the swing of the end effector, avoiding the damage to the locking member 3 when the driving member 6 rotates, and during the rotation of the driving member 6, there is no interference from the locking member 3, so that the movement of the end effector Swing is smoother. The locking member 3 is movably arranged on the outside of the driving member 6, which can more conveniently arrange the internal structure of the swing mechanism without affecting the structure and strength of the driving wheel itself, and the design of the locking member 3 The space is more sufficient, and the size of the clamping part 3 can be designed more reasonably to ensure sufficient strength, so that when a large firing force is applied for an anastomosis of thicker tissues, the locking of the swing angle can also be maintained to ensure a smooth operation To improve the confidence of doctors. Further, since the locking element 3 is movably arranged on the outside of the driving element, the design space of the locking element 3 is more sufficient, so that the length of the second fitting part of the locking element 3 can be designed to be relatively longer, corresponding to The depth of the second groove 51 of the second matching part 5 is designed to be relatively deeper, so that the locking effect is better, and it is more suitable for operations that require greater firing force.

Therefore, in this embodiment, the swinging head mechanism controls the swinging of the end effector in two steps: in the first step, only the first matching part 2 rotates, the second matching part 5 and the driving part 6 do not rotate, Drive the locking part 3 to move from the first position to the second position, so that the locking part 3 is separated from the second matching part 5; in the second step, the second matching part 5 and the driving part 6 are driven to rotate, and the driving part 6 And the swing head connecting rod 71 drives the swing head pull rod 72 to move in the axial direction. The actuation of these two steps can be realized by the operating element 1 . The operating member 1 is configured to drive the first matching member 2 to rotate and drive the locking member 3 to enter the second position from the first position when the first stroke is rotated, and the operating member 1 continues to When rotating in the second stroke, the driving member 6 is driven to rotate by the second matching member 5 .

Specifically, as shown in FIGS. 11 to 13 , the swing head mechanism further includes a first pin shaft 43 and a second elastic member 42 . The operating part 1 is provided with a first mounting hole 12, the first fitting 2 is provided with a second mounting hole 23, the second fitting 5 is provided with a third mounting hole 52, and the first pin 43 are passed through the first installation hole 12 , the second installation hole 23 and the third installation hole 52 in sequence. The first mounting hole 12 and the second mounting hole 23 are circular holes respectively, and the inner diameters of the first mounting hole 12 and the second mounting hole 23 are equal to that of the first pin 43 The outer diameter is adapted to the first pin shaft 43 . The third mounting hole 52 is an arc-shaped hole, and the circumferential length of the third mounting hole 52 is greater than the outer diameter of the first pin shaft 43 . The second elastic member 42 is connected between the first pin shaft 43 and the driving shaft 61 . The second elastic member 42 can adopt elastic structures such as extension springs, torsion springs, compression springs, and elastic sheets.

In this embodiment, two first pin shafts 43 are shown, and the two first pin shafts 43 are arranged symmetrically with respect to the drive shaft 61, but the application is not limited thereto. In other embodiments, the first Pin shaft 43 can also be set as one, three or more. The numbers of the first mounting holes 12 , the second mounting holes 23 and the third mounting holes 52 correspond to the numbers of the first pin shafts 43 respectively. As shown in FIG. 8 , the support 9 is further provided with an arc-shaped rotation limiting hole 94 , and the first pin shaft 43 passes through the rotation limiting hole 94 . Since the position of the support 9 relative to the first housing 81 is fixed, the rotation limit hole 94 of the support 9 can limit the rotation stroke of the first pin shaft 43 . The circumferential length of the rotation limiting hole 94 is greater than the circumferential length of the third installation hole 52 .

In an initial state, the locking member 3 is located at a first position close to the driving member 6 . The first fitting part 31 and the second fitting part 32 enter into the first slot 21 and the second slot 51 respectively, and the driving part 6 is locked at the current position by the second fitting part 5 . The first pin shaft 43 is located substantially at the center of the third mounting hole 52 , the first pin shaft 43 is at a third relative position relative to the driving member 6 , and the first pin shaft 43 is located at The rotation limiting hole 94 is basically at the center. The second elastic member 42 is not elastically deformed. When the operating member 1 is operated to rotate the first stroke, the operating member 1 drives the first fitting 2 to rotate through the first pin shaft 43 , and the first groove wall 211 of the first fitting 2 Driving the first matching portion 31 of the locking member 3, so that the locking member 3 moves away from the driving member 6 and enters the second position, and compresses the first elastic member 41 to become elastic out of shape. The second matching portion 32 is separated from the second slot 51 and no longer locks the second matching part 5 . During the first stroke of the operating member 1, the first pin 43 moves in the third mounting hole 52 without driving the second fitting 5 to rotate. The first pin 43 Relative to the driving member 6 reaches the fourth relative position, and drives the second elastic member 42 to elastically deform.

The operating member 1 rotates the first stroke until the first pin shaft 43 reaches one end of the third mounting hole 52, and when the operating member 1 is operated to continue to rotate the second stroke, the operating member 1 The first fitting 2 and the second fitting 5 are simultaneously driven to rotate through the first pin shaft 43, the second fitting 5 drives the driving member 6 to rotate, and the driving member 6 passes through the The swing head connecting rod 71 drives the swing head pull rod 72 to move axially, thereby realizing the lateral swing of the end effector. At this time, the operating member 1 is released, and under the elastic deformation restoring force of the second elastic member 42, the first pin shaft 43 will return to the substantially central position of the third mounting hole 52, That is, return to the third relative position relative to the driving member 6 . Under the elastic deformation recovery force of the first elastic member 41, the locking member 3 returns from the second position to the first position, and the first matching portion 31 and the second matching portion 32 respectively enter the currently facing first slot 21 and second slot 51, and lock the driving member 6 at the current position again to maintain the stability of the current swing angle of the end effector. When the angle of the end effector needs to be adjusted, the preceding two steps can be repeated. During the adjustment process, if the first pin shaft 43 rotates to the end of the rotation limiting hole 94, the first pin shaft 43 cannot continue to rotate in the current direction, and at this time the end effector has reached Maximum swing angle.

As shown in Fig. 14 and Fig. 15, a first guide part 813 is provided inside the notch 812, and a second guide part 33 is provided in the locking part 3, and the first guide part 813 passes through the second guide part 813. The cooperation of the guide part 33 guides the movement of the locking member 3 between the first position and the second position. In this embodiment, the first guide part 813 is a guide bar or a slider, and the second guide part 33 is a guide groove. In other embodiments, the first guide part 813 may also be a guide groove, and the second guide part 33 may be a guide bar or a slider.

As shown in Figures 12-14, 16-18, there is a first angle between the first groove walls 211 of the first groove 21, and there is a second angle between the second groove walls 511 of each of the second grooves 51. , the first angle is greater than the second angle. The width of the first matching portion 31 of the engaging member 3 is greater than the width of the second matching portion 32 . And/or, the depth of the first groove 21 is smaller than the depth of the second groove 51, and the end of the first matching portion 31 is closer to the drive shaft 61 than the end of the second matching portion 32 . By distinguishing the structural design of the first groove 21 and the second groove 51, and/or the structural design of the first matching portion 31 and the second matching portion 32, compared to the second groove 51, the retaining member 3 is easier to disengage from the first groove 21.

The above content is a further detailed description of the present application in conjunction with specific preferred implementation modes, and it cannot be considered that the specific implementation of the present application is limited to these descriptions. For those of ordinary skill in the technical field to which this application belongs, some simple deduction or substitutions can be made without departing from the concept of this application, which should be deemed to belong to the protection scope of this application.

Claims (12)

1. A head swing mechanism for a surgical stapler, the head swing mechanism comprising a driver (6) and a head swing pull rod (72), the drive member (6) is configured to drive the head swing pull rod when rotating (72) Axial movement along the stapler, characterized in that the swing head mechanism further includes: The locking part (3) is movably arranged on the outside of the driving part (6). When the locking part (3) is in the first position, the locking part (3) blocks the driving part ( 6), when the clamping member (3) is in the second position, the driving member (6) can be driven to rotate, and the first position is closer to the drive (6); The first matching part (2) is configured to be operated to drive the locking part (3) from the first position to the second position. 2. The swinging head mechanism according to claim 1, characterized in that, the driving member (6) and the first matching member (2) are coaxially arranged on the first shell (81) of the surgical stapler ) in the installation hole (811) formed, the side wall of the installation hole (811) is circular with a notch (812), and the locking member (3) is movably arranged in the notch (812) Location. 3. The swing head mechanism according to claim 2, characterized in that, the inside of the notch (812) is provided with a first guide portion (813), and the locking member (3) is provided with a second guide portion ( 33), the first guide part guides the movement of the locking member (3) between the first position and the second position through cooperation with the second guide part. 4. The swing head mechanism according to claim 3, characterized in that it further comprises a support (9), the support (9) is at least partially supported on the outer periphery of the mounting hole (811) and at least partially covers the The clamping piece (3), the support (9) is provided with a clamping piece limiting hole (92) on the side facing the clamping piece (3), and the clamping piece (3) is at least partly located In the limiting hole (92) of the locking member. 5. The swing head mechanism according to claim 1, characterized in that it further comprises a second fitting (5), and the second fitting (5) forms a non-rotatable connection with the driving member (6) , when the locking member (3) is in the first position, the locking member (3) is at least partially abutted against the second fitting (5) to block the second fitting (5) ) rotation. 6. The swing head mechanism according to claim 5, characterized in that, the locking member (3) includes a first fitting portion (31), and a first groove is provided on the side of the first fitting member (2) (21), when the retaining member (3) is in the first position, the first matching portion (31) at least partially enters the first groove (21); The clamping part (3) also includes a second matching part (32), the side of the second matching part (5) is provided with a second groove (51), and the clamping part (3) In a first position, the second matching portion (32) at least partially enters the second slot (51). 7. The swing head mechanism according to claim 6, characterized in that there is a first angle between the first groove walls (211) of each of the first grooves (21), and each of the second grooves (51) There is a second angle between the second groove walls (511), and the first angle is greater than the second angle; or, the depth of the first groove (21) is smaller than the depth of the second groove (51) ; The driving part (6) includes a driving shaft (61) and a driving part body (62), and the second matching part (5) and the first matching part (2) are sequentially arranged on the driving part body (62) ), and the first fitting (2) can rotate relative to the drive shaft (61). 8. The swing head mechanism according to claim 7, characterized in that, both the first fitting (2) and the second fitting (5) are sleeved on the outside of the drive shaft (61) Disc-shaped, the first fitting (2) is provided with a plurality of circumferentially distributed first grooves (21) on the side facing the locking member (3), and the second fitting ( 5) A plurality of second grooves (51) distributed along the circumferential direction are provided on one side facing the locking member (3). 9. The swing head mechanism according to claim 6, characterized in that, the width of the first matching portion (31) of the locking member (3) is greater than the width of the second matching portion (32), and/or Or, the end of the first matching portion (31) is closer to the driving shaft (61) than the end of the second matching portion (32). 10. The head swing mechanism according to claim 5, characterized in that, the head swing mechanism further comprises an operating member (1), and the operating member (1) is configured to drive the first stroke when the first stroke is rotated. A matching part (2) rotates to drive the clamping part (3) from the first position to the second position, and when the operating part (1) continues to rotate for a second stroke, through the second fitting Part (5) drives described driving part (6) to rotate; The swing head mechanism also includes a first pin shaft (43), the operating part (1) is provided with a first mounting hole (12), and the first fitting part (2) is provided with a second mounting hole (23) , the second fitting (5) is provided with a third mounting hole (52), and the first pin shaft (43) passes through the first mounting hole (12) and the second mounting hole ( 23) and the third mounting hole (52), the circumferential length of the third mounting hole (52) is greater than the outer diameter of the first pin shaft (43); The head swing mechanism also includes a support (9), and the support (9) is provided with an arc-shaped rotation limiting hole (94), and the first pin shaft (43) is passed through the rotation limiting hole. in hole (94). 11. The swing head mechanism according to claim 10, characterized in that, when the operating member (1) is configured to rotate the first stroke, the first pin shaft (43) is relatively ) moves from a third relative position to a fourth relative position; The swing mechanism further includes an elastic member (42) configured to give the first pin shaft (43) a biasing force to move from the fourth relative position to the third relative position. 12. A surgical stapler, characterized in that it comprises the swing head mechanism according to any one of claims 1 to 11.

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