CN116138825A - Swing mechanism and medical anastomat - Google Patents

Abstract

The invention provides a head swinging mechanism and a medical anastomat, wherein the head swinging mechanism comprises a gear set, and comprises a driving wheel and a driven wheel, wherein a driving gear tooth part of the driving wheel is meshed with a driven gear part of the driven wheel; the swinging head pull rod and the swinging head pull piece are connected to the pull piece matching part of the swinging head pull rod, and when the driven wheel rotates, the swinging head pull piece is further driven to move along the axial direction of the anastomat by the swinging head pull rod; the locking piece comprises a locking part. The invention can simply and conveniently realize the swinging of the nail head of the anastomat relative to the anastomat body. And when the nail is not rotated by external force, the locking part is meshed with the driving gear tooth part and/or the driven gear tooth part so as to prevent the rotation of the locking part, improve the position stability of the nail head part and avoid uncontrollable swing. When the driving wheel and/or the driven wheel are driven by external force to rotate, the locking part moves in a direction away from the driving gear tooth part and/or the driven gear tooth part without blocking the rotation of the locking part, and the function realization of the head swinging mechanism is not influenced.

Description

Swing mechanism and medical anastomat

Technical Field

The invention relates to the technical field of medical instruments, in particular to a head swinging mechanism and a medical anastomat.

Background

In the prior art, a medical anastomat comprises an anastomat body, a firing handle movably connected with the anastomat body and a nail anvil component matched with the body. The anastomat body comprises a firing assembly and a nail bin assembly arranged at the far end side. In the operation process, two sections of tissues needing to be anastomosed are placed between a nail anvil of a nail anvil assembly and a nail bin of a nail bin assembly, the distance between the nail anvil and the nail bin is adjusted to gradually clamp the tissues, and then a percussion assembly is driven by a percussion handle to enable anastomoses to be molded on the nail anvil, so that anastomotic connection of the two sections of tissues is completed.

To accommodate the need for more surgical scenarios, it is desirable that the staple head be more angularly selectable relative to the stapler body. Thus, a head-swing mechanism may be provided between the stapler body and the head portion, the head-swing mechanism comprising a head-swing pull tab, the distal end of the head-swing pull tab being connected to the head portion, the distal end side of the head-swing pull lever driving the head portion to swing clockwise or counterclockwise relative to the stapler body when the head-swing pull lever is driven to move in the axial direction of the stapler.

The existing swing mechanism is generally complex in structure, when the swing head swings, the swing angle is difficult to set, and in the use process, the phenomenon of uncontrollable swing of the nail head can occur, so that the swing angle of the nail head is uncontrollable, the nail head of the anastomat cannot be accurately positioned, and the operation effect is affected.

In the present invention, the distal end side and the proximal end side are the proximal end side with respect to the operator, and the end closer to the operator, that is, the end closer to the surgical site is the distal end side. In the anastomat, the inner side and the outer side are relative to the axis of the anastomat, the side close to the axis is the inner side, and the side far away from the axis is the outer side.

Disclosure of Invention

Aiming at the problems in the prior art, the invention aims to provide a head swinging mechanism and a medical anastomat, which can simply and conveniently realize the swinging of the nail head of the anastomat relative to the anastomat body, improve the position stability of the nail head and avoid uncontrollable swinging.

The embodiment of the invention provides a head swinging mechanism for a medical anastomat, which comprises:

the gear set comprises a driving wheel and a driven wheel, the driving wheel comprises a driving gear tooth part, the driven wheel comprises a driven gear tooth part and a first matching part, and the driven gear tooth part is meshed with the driving gear tooth part;

the swing head pull rod comprises a second matching part and a pull piece matching part, the second matching part is matched with the first matching part, the swing head pull piece is connected to the pull piece matching part of the swing head pull rod, so that when the driven wheel rotates, the swing head pull rod is driven to move along the axial direction of the anastomat, and the swing head pull rod drives the swing head pull piece to move along the axial direction through the pull piece matching part; and

The locking piece comprises a locking part;

when the driving wheel and/or the driven wheel are not driven by external force, the locking part is meshed with the driving wheel tooth part and/or the driven wheel tooth part to prevent the rotation of the driving wheel and/or the driven wheel, and when the driving wheel and/or the driven wheel are driven by external force to rotate, the locking part moves in a direction away from the driving wheel tooth part and/or the driven wheel tooth part under the action of the driving wheel tooth part and/or the driven wheel tooth part without preventing the rotation of the driving wheel and/or the driven wheel.

In some embodiments, the locking member is at least partially elastic, when the driving wheel and/or the driven wheel are driven to rotate by external force, the locking part is elastically deformed under the action of the driving wheel tooth part and/or the driven wheel tooth part to move in a direction away from the driving wheel tooth part and/or the driven wheel tooth part, and when the driving wheel and/or the driven wheel stops rotating, the locking part is meshed with the driving wheel tooth part and/or the driven wheel tooth part again under the action of elastic restoring force.

In some embodiments, the driving gear tooth portion includes a plurality of driving gear teeth, the locking portion includes two inclined guide surfaces, the guide surfaces of the locking portion enter at least partially between two adjacent driving gear teeth when the locking portion is engaged with the driving gear tooth portion, and the two guide surfaces are respectively opposite to the side surfaces of the two adjacent driving gear teeth;

Alternatively, the driven gear tooth portion includes a plurality of driven gear teeth, the locking portion includes two inclined guide surfaces, and when the locking portion is engaged with the driven gear tooth portion, the guide surfaces of the locking portion at least partially enter between two adjacent driven gear teeth, and the two guide surfaces are respectively opposite to the side surfaces of the two adjacent driven gear teeth.

In some embodiments, the driving gear tooth portion includes a plurality of driving gear teeth, a side of the locking portion facing the driving gear tooth portion is an arc surface, and when the locking portion is meshed with the driving gear tooth portion, the arc surface of the locking portion at least partially enters between two adjacent driving gear teeth;

or, the driven gear tooth portion includes a plurality of driven gear teeth, one side of the locking portion facing the driven gear tooth portion is an arc surface, and when the locking portion is meshed with the driven gear tooth portion, the arc surface of the locking portion at least partially enters between two adjacent driven gear teeth.

In some embodiments, the locking member is rod-shaped and the locking member is parallel to a central axis of the drive wheel and/or the driven wheel.

In some embodiments, the device further comprises a housing and a fixture, the housing comprising a receiving cavity for receiving the gear set, the fixture, and the swing rod, the housing comprising a first inner surface and a second inner surface surrounding the receiving cavity, the fixture being secured to the housing, the fixture comprising a third surface facing the first inner surface and a fourth surface facing the second inner surface, the gear set being at least partially disposed between the second inner surface of the housing and the fourth surface of the fixture;

The locking piece further comprises a connecting part, and at least part of the locking part is connected with the fixing piece through the connecting part.

In some embodiments, the swing link is located between the third surface of the mount and the first inner surface of the housing.

In some embodiments, the fixing member includes a driving wheel support portion and a driven wheel support portion, the driving wheel support portion is located between the driving wheel and the first inner surface of the housing, the driven wheel support portion is located between the driven wheel and the first inner surface of the housing, the connecting portion of the locking member is connected to the driving wheel support portion, and/or the connecting portion of the locking member is connected to the driven wheel support portion.

In some embodiments, the gear set includes two driven wheels, the swing mechanism includes two swing pull rods and two swing pull pieces, when the driving wheel rotates, the driven wheels drive the two swing pull rods to move axially, and the movement directions of the two swing pull rods are opposite, and the fixing piece includes two driven wheel supporting parts.

In some embodiments, the locking device comprises two locking pieces, wherein the two locking pieces are respectively arranged between the two driven wheel supporting parts and the driving wheel supporting part, and the connecting parts of the locking pieces are connected with the driving wheel supporting part through first connecting arms and connected with one driven wheel supporting part through second connecting arms.

In some embodiments, the first connecting arm is perpendicular to the second connecting arm.

In some embodiments, the first mating portion is an eccentric portion, the second mating portion is an eccentric mating portion, the swing tie is located between the third surface of the fixing piece and the first inner surface of the housing, the driven wheel supporting portion of the fixing piece is provided with a through hole, and the eccentric portion of the driven wheel is mated with the eccentric mating portion of the swing tie after passing through the through hole;

in the initial state, the central shafts of the eccentric wheel parts of the two driven wheels are positioned at the outer sides of the corresponding driven wheel rotating shafts, or in the initial state, the central shafts of the eccentric wheel parts of the two driven wheels are positioned at the inner sides of the corresponding driven wheel rotating shafts.

In some embodiments, the eccentric wheel matching part is provided with a matching groove or a third matching hole, the eccentric wheel part at least partially enters the matching groove or the third matching hole, and the eccentric wheel is matched with the matching groove or the third matching hole to drive the swing pull rod to move along the axial direction;

the axial length of the through hole of the driven wheel supporting part is larger than the radius of the eccentric wheel part and is larger than the axial length of the matching groove or the third matching hole of the eccentric wheel matching part.

In some embodiments, a yielding groove is formed in one side, facing the first inner surface of the shell, of the driving wheel supporting portion, a sleeve limiting portion is arranged at a position, opposite to the yielding groove, of the shell, and the yielding groove and the sleeve limiting portion enclose a first channel along the axial direction; and/or the number of the groups of groups,

a second channel along the axial direction is formed between the two driven wheel supporting parts.

In some embodiments, a first fixing portion is disposed on a side of the driving wheel support portion facing the driving wheel, a second fixing portion is disposed on a side of the driving wheel facing the fixing member, the first fixing portion and the second fixing portion form an embedded connection, and the driving wheel can rotate relative to the first fixing portion.

In some embodiments, the first fixing portion is a first fixing column arranged on the supporting portion of the driving wheel and protruding towards the driving wheel, the second fixing portion is a groove formed on one side of the driving wheel towards the fixing piece, the groove and the driving wheel are coaxially arranged, and the first fixing column at least partially enters the groove; or alternatively, the first and second heat exchangers may be,

the first fixing part is a groove arranged on one side of the driving wheel supporting part, which faces the driving wheel, the second fixing part is a first fixing column arranged on the first fixing column, which faces the fixing piece, and protrudes out, the first fixing column and the driving wheel are coaxially arranged, and at least part of the first fixing column enters the groove.

In some embodiments, a third fixing portion is disposed on a side, facing the first inner surface of the housing, of the driving wheel supporting portion, a fourth fixing portion is disposed on the first inner surface of the housing, and the third fixing portion and the fourth fixing portion form an embedded connection; and/or the number of the groups of groups,

a fifth fixing part is arranged on one side, facing the first inner surface of the shell, of the driven wheel supporting part, a sixth fixing part is arranged on the first inner surface of the shell, and the fifth fixing part and the sixth fixing part are connected in an embedded mode.

In some embodiments, the third fixing portion is a second fixing column protruding towards the first inner surface of the casing, the fourth fixing portion is a first supporting seat arranged on the first inner surface of the casing, a first matching hole is formed in the center of the first supporting seat, the second fixing column at least partially enters the first matching hole, or the third fixing portion comprises a first matching hole, the fourth fixing portion is a second fixing column arranged on the casing and towards the driving wheel supporting portion, and the second fixing column at least partially enters the first matching hole;

the fifth fixing portion is a third fixing column protruding towards the first inner surface of the shell, the sixth fixing portion is a second supporting seat arranged on the first inner surface of the shell, a second matching hole is formed in the center of the second supporting seat, the third fixing column at least partially enters the second matching hole, or the fifth fixing portion comprises a second matching hole, the sixth fixing portion is a third fixing column arranged on the shell and facing the driven wheel supporting portion, and the third fixing column at least partially enters the second matching hole.

The embodiment of the invention also provides a medical anastomat, which comprises the head swinging mechanism.

The swing mechanism and the medical anastomat provided by the invention have the following advantages:

according to the invention, the driven wheel is driven to rotate by the driving wheel, the rotary motion is converted into the axial motion by the cooperation of the driven wheel and the swing head pull rod, and the swing head pull rod drives the swing head pull piece to axially move, so that the swing of the nail head part of the anastomat relative to the anastomat body can be simply and conveniently realized. Under the state of not receiving external force, the locking part stops the rotation of action wheel, improves the position stability of nail head, avoids taking place uncontrollable swing. In addition, when the operation part of the driving wheel is operated to drive the driving wheel to rotate, the locking part moves away from the driving wheel tooth part under the acting force of the driving wheel tooth part without blocking the rotation of the driving wheel, and the normal implementation of the head swing control function of the head swing mechanism is not influenced.

Drawings

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

FIG. 1 is a top view of a medical stapler according to an embodiment of the invention;

FIG. 2 is a schematic view of an embodiment of the present invention omitting the cooperation of the second housing swing-back mechanism and the stapler body;

FIG. 3 is a schematic view of an embodiment of the present invention omitting the cooperation of the first housing swing-back mechanism and the stapler body;

FIG. 4 is a schematic illustration of a structure of an embodiment of the invention omitting a housing swing-back mechanism;

FIG. 5 is a schematic view of a swing mechanism of an embodiment of the present invention with a housing omitted;

FIG. 6 is a front view of the swing mechanism with the housing omitted in an embodiment of the invention;

FIG. 7 is a top view of the swing mechanism with the housing omitted in an embodiment of the invention;

FIG. 8 is a schematic diagram of a gear set engaged with a swing link in an initial state according to an embodiment of the invention;

FIG. 9 is a schematic view of a gear set engaged with a swing head lever when a control pin head swings in the R1 direction in accordance with an embodiment of the present invention;

FIG. 10 is a schematic view of a gear set engaged with a swing head lever when a control pin head swings in the R2 direction in accordance with an embodiment of the present invention;

FIGS. 11 and 12 are schematic views showing the structure of a fixing member according to an embodiment of the present invention;

FIG. 13 is a top view of a fastener according to an embodiment of the present invention;

FIG. 14 is an enlarged view at A in FIG. 13;

FIG. 15 is a schematic view showing the structure of the fixing member mated with the second housing according to an embodiment of the present invention;

FIG. 16 is a schematic view of the structure of a first housing according to an embodiment of the present invention;

FIG. 17 is a schematic view showing the structure of the fixing member mated with the first housing according to an embodiment of the present invention;

FIG. 18 is a schematic diagram of the structure of a gear set according to an embodiment of the invention;

FIG. 19 is a schematic view showing the structure of the fixing member cooperating with the driving wheel according to an embodiment of the present invention;

FIG. 20 is a schematic view of a fixing member and a swing link according to an embodiment of the present invention;

FIG. 21 is a schematic view of a fastener and gear set in accordance with another embodiment of the present invention.

Reference numerals:

1. waist-shaped hole of anastomat body 611

11. Guide portion of sleeve 62

20. Third channel 63 tab mating portion

2. Second housing 7 fixing member

21. First fixing portion of accommodation hole 71

22. Second fixing hole 72 third fixing portion

23. Fifth fixing portion of limiting member 73

30. First channel 74 drive wheel support

3. First shell 741 abdication groove

31. Fourth fixing portion 75 driven wheel supporting portion

32. First fixing hole 751 through hole

33. Guide groove 76 locking piece (embodiment one)

34. Sixth fixing portion 761 locking portion (embodiment one)

35. Guide surface of sleeve limit part 7611

4. Connection part of driving wheel 762 (first embodiment)

41. Knob 77 first connecting arm

42. Second connecting arm of driving gear tooth part 78

43. Second channel of second fixing portion 79

5. Driven wheel 710 locking piece (second embodiment)

51. Driven wheel rotation shaft 7101 locking part (second embodiment)

511. First end 7102 of rotating shaft (second embodiment)

512. Second end 8 of the rotating shaft is a swing pull tab

52. Driven gear tooth 9 nail head

53. Eccentric wheel 91 nail anvil

6. Swinging head pull rod 93 connecting piece

61. Eccentric wheel matching part

Detailed Description

Example embodiments will now be described more fully with reference to the accompanying drawings. However, the exemplary embodiments can 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 disclosure will be thorough and complete, and will fully convey the concept of the example embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and thus a repetitive description thereof will be omitted.

The invention provides a head swinging mechanism and a medical anastomat comprising the same. The swing mechanism comprises a gear set, a swing pull rod, a swing pull piece and a locking piece. The gear set comprises a driving wheel and a driven wheel, wherein the driving gear tooth part of the driving wheel is meshed with the driven gear part of the driven wheel. The swing head pull piece is connected to the pull piece matching part of the swing head pull rod, and when the driven wheel rotates, the swing head pull piece is further driven to move along the axial direction of the anastomat through the swing head pull rod. The locking member includes a locking portion. The invention can simply and conveniently realize the swinging of the nail head of the anastomat relative to the anastomat body. And when the nail is not rotated by external force, the locking part is meshed with the driving gear tooth part and/or the driven gear tooth part so as to prevent the rotation of the locking part, improve the position stability of the nail head part and avoid uncontrollable swing. When the driving wheel and/or the driven wheel are driven by external force to rotate, the locking part moves in a direction away from the driving gear tooth part and/or the driven gear tooth part without blocking the rotation of the locking part, and the function realization of the head swinging mechanism is not influenced.

In the present invention, the driven wheel refers to a gear provided with a first engaging portion engaged with the swing link, and the driving wheel refers to a gear engaged with the driven wheel, but it is not particularly necessary that the driving wheel drives the driven wheel to rotate. In different embodiments, the driving wheel may rotate to drive the driven wheel to rotate, or the driven wheel may rotate to drive the driving wheel to rotate.

The following describes the structure of the swing mechanism of each embodiment of the present invention in detail with reference to the accompanying drawings, and it is to be understood that each embodiment is not a limitation of the protection scope of the present invention.

The invention provides a head swing mechanism and a medical anastomat comprising the same, as shown in fig. 1-3, the medical anastomat comprises a nail head 9, an anastomat body 1 and the head swing mechanism arranged between the nail head 9 and the anastomat body 1. The stapler body 1 comprises a sleeve 11, the distal side of the sleeve 11 being connected to the head 9. The head 9 includes an anvil 91 and a cartridge assembly (not shown) disposed opposite each other and a connector 93 on a proximal side of the anvil 91 and cartridge assembly. The swing mechanism comprises a shell and two swing pull pieces 8 penetrating through the shell, and the shell comprises a first shell 3 and a second shell 2. The swing tab 8 is at least partially located inside the sleeve 11. The distal side of the swing tab 8 is connected to the connector 93. The axial movement of the swing head pull piece 8 can control the transverse swing of the nail head 9 along the R1 direction or the R2 direction relative to the axis S0 of the anastomat. When the two swing pull pieces 8 axially move, the movement directions are opposite.

In the present invention, the distal end side and the proximal end side are the proximal end side with respect to the operator, the end closer to the operator, the end farther from the operator, i.e., the end closer to the operation position, are the distal end sides, and the direction along the axis of the stapler is the axial direction, i.e., the direction from the distal end side to the proximal end side of the stapler, or the direction from the proximal end side to the distal end side of the stapler. For example, in the view of fig. 1, the distal end side of the nail head 9 is the left side, and the proximal end side is the right side. The S1 direction is the direction from the distal end side to the proximal end side of the stapler. The direction S1 or the direction opposite to the direction S1 is defined as the axial direction of the anastomat. The direction S2 in fig. 1 is defined as the transverse direction of the stapler, i.e. the width direction. The S3 direction in fig. 6 is defined as the longitudinal direction of the stapler, i.e. the height direction. In the present invention, the inner side and the outer side are the inner side and the outer side of the axis of the stapler and the side away from the axis, respectively, with respect to the axis of the stapler. For convenience of description, the "upper" and "lower" are described in view of the drawings, but these descriptions should not be construed as limitations of the present invention. In various embodiments, the relative positional relationship of "up" and "down" may be interchanged.

In this embodiment, the housing includes a first inner surface and a second inner surface. As shown in fig. 2 and 3, the housing is divided into a first housing 3 located below and a second housing 2 located above, the first housing 3 and the second housing 2 together defining a third passage 20 for passing through the cannula 11. The third channel 20, which is marked in fig. 3 and 4, is part of a third channel, and the first housing 2 and the second housing 3 are combined to form a complete third channel 20. The first inner surface is the inner surface of the first housing 3, and the second inner surface is the inner surface of the second housing 2.

As shown in fig. 3 and 4, the swing mechanism further includes a gear set and a swing rod 6, which are accommodated in an accommodating cavity formed by enclosing the first housing 3 and the second housing 2. The gear set comprises a driving wheel 4 and a driven wheel 5, wherein the driving wheel 4 comprises an operation part and a driving gear tooth part 42. In this embodiment, the operation portion is a knob 41 at least partially exposed to the outside of the second housing 2. In another embodiment, the driven wheel 5 may include an operation portion, and the driven wheel 5 may be manually operated to drive the driving wheel 4 to rotate. The driven pulley 5 includes a driven pulley tooth portion 52, a first mating portion, and a driven pulley rotation shaft 51, and the driven pulley rotation shaft 51 passes through the driven pulley tooth portion 52 and the first mating portion. The driven gear tooth portion 52 is engaged with the driving gear tooth portion 42 so that the driven gear 5 can be driven to rotate when the driving gear 4 rotates. The swing pull rod 6 comprises a second matching part and a pull piece matching part 63, the pull piece matching part 63 is connected to the proximal end side of the swing pull piece 8, and the second matching part is matched with the first matching part, so that when the driven wheel 5 rotates, the pull piece matching part 63 of the swing pull rod 6 is driven to move along the axial direction of the anastomat, and then the swing pull piece 8 is driven to move along the axial direction. The invention can flexibly adjust the swinging direction and swinging angle of the nail head 9 by controlling the rotating angle of the driving wheel 4 through the gear cooperation of the driving wheel 4 and the driven wheel 5.

As shown in fig. 3 and 4, in this embodiment, two swing links 6 are provided corresponding to two swing tabs 8, the two swing links 6 being symmetrically disposed with respect to the axial direction of the stapler. When the driving wheel 4 rotates, the movement directions of the two swing pull rods 6 are opposite. And two driven wheels 5 are correspondingly provided, the two driven wheels 5 being located on the proximal side of the driving wheel 4. The two driven wheels 5 are symmetrically arranged relative to the axis of the anastomat, the central axes of the two driven wheels 5 are parallel to the central axis of the driving wheel 4, and the distances from the central axes of the two driven wheels 5 to the central axis of the driving wheel 4 are equal. The shape of the accommodating cavity enclosed by the first casing 3 and the second casing 2 is adapted to the shape of the gear set.

As shown in fig. 5 and 6, the driving cog portion 42 includes a plurality of driving cogs. The swing mechanism further includes at least one locking member 76, the locking member 76 including a locking portion 761. In the initial state, the locking part 761 is meshed with the driving gear tooth part 42 to block the rotation of the driving wheel 4, so that the position stability of the nail head 9 is improved, and the occurrence of uncontrollable swing is avoided. When the knob 41 of the driving wheel 4 is operated to drive the driving wheel 4 to rotate, the locking part 761 moves away from the driving gear tooth part 42 under the action of the driving gear tooth part 42 without blocking the rotation of the driving wheel 4, so that the head swinging mechanism can still control the swinging of the nail head 9, and the normal implementation of the head swinging control function of the head swinging mechanism is not influenced.

In this embodiment, the locking member 76 is at least partially resilient. In the initial state, the locking part 761 is at least partially embedded between two adjacent driving gear teeth, and the locking piece 76 is not elastically deformed or is slightly elastically deformed. At this time, if the anastomat shakes, the driving wheel 4 has an unintended rotation tendency, and the locking piece 76 still remains embedded between two adjacent driving gear teeth to block the rotation of the driving gear tooth part 42 because the force applied by the driving gear tooth on the locking part 761 is smaller than the force for elastically deforming the locking piece 76. When the operator operates the knob 41 to rotate, the operator applies the force to the driving wheel 4 through the knob 41 to enable the driving wheel 4 to rotate, at this time, the force applied by the driving gear teeth to the locking part 761 is larger than the force for enabling the locking piece 76 to elastically deform, the locking part 761 elastically deforms under the action of the driving gear tooth part 42 to move in the direction away from the driving gear tooth part 42, so that the rotation of the driving wheel 4 is not blocked, and at this time, the head swinging mechanism can realize the control of the swinging of the nail head 9. When the external force applied to the knob 41 by the operator is removed, the driving wheel 4 stops rotating, the locking part 761 moves to the direction approaching the driving gear tooth part 42 under the action of the elastic restoring force and enters between two adjacent driving gear teeth again to be meshed with the driving gear tooth part 42, so that the driving wheel 4 is kept at the current position, no unintentional shaking occurs, and the nail head 9 can be well kept at the current swinging angle.

As shown in fig. 4 to 7, in this embodiment, the swing mechanism further includes a fixing member 7. The fixing piece 7 is located between the gear set and the inner surface of the first casing 3, the gear set is fixed on the inner surface of the first casing 3 through the fixing piece 7, and the driving wheel 4 and the driven wheel 5 can rotate relative to the fixing piece 7, so that the structural stability of the head swinging mechanism is maintained, the unstable position of the nail head 9 caused by the unstable gear set in the using process is avoided, and the operation effect is improved. Specifically, the fixing member 7 includes a driving wheel support 74 and two driven wheel supports 75. The driving wheel support 74 is located between the driving wheel 4 and the inner surface of the first housing 3, and the driven wheel support 75 is located between the driven wheel 5 and the inner surface of the first housing 3. The swing link 6 is located between the driven wheel support 75 and the inner surface of the first housing 3. The locking member 76 further includes a connecting portion 762, and the locking portion 761 is connected to the fixing member 7 through the connecting portion 762. The fixing member 7 is fixed to the first housing 3. Thus, the locking member 76 can be fixed to the first housing 3 by the fixing member 7. The manner in which the fixing member 7 is fixed to the gear set and the first housing 3 will be described in detail below.

As shown in fig. 8, the first mating portion is an eccentric portion 53, and the second mating portion is an eccentric mating portion 61, and mates with the eccentric portion 53, so that when the driven wheel 5 rotates, the rotation motion of the driven wheel 5 is converted into the axial motion of the swing rod 6. In this embodiment, the outer contour of the eccentric portion 53 is circular or circular arc-shaped. In other embodiments, the outer profile of the eccentric portion 53 may have other shapes, such as a triangle or other polygon. The driven wheel rotation shaft 51 passes through the center of the driven wheel tooth portion 52. However, the eccentric portion 53 is eccentrically disposed with respect to the driven wheel rotation shaft 51, that is, the center of the driven wheel rotation shaft 51 is spaced apart from the center axis O1 of the eccentric portion 53 by a first distance d1. A third mating hole is formed in the eccentric wheel mating portion 61 of the swing rod 6, and the eccentric wheel portion 53 at least partially enters the third mating hole. In a further alternative embodiment, a mating groove can also be provided in the eccentric mating portion 61 of the oscillating bar 6, into which the eccentric portion 53 at least partially enters.

As shown in fig. 2 and 8, the inner surface of the first housing 3 is provided with a guiding groove 33, the guiding groove 33 extends along the axial direction of the anastomat, the swing pull rod 6 further comprises a guiding part 62, the guiding part 62 is positioned in the guiding groove 33, and is limited by the guiding groove 33 to only move axially, when the driving wheel 4 rotates, the swing pull rod 6 is ensured to move axially and not to swing transversely. Specifically, in this embodiment, the swing link 6 includes two guide portions 62, the two guide portions 62 are respectively located on the distal end side and the proximal end side of the eccentric wheel fitting portion 61, and the guide portions 62 are in a bar shape extending in the axial direction of the stapler.

As shown in fig. 4 and 8, the tab engaging portion 63 is a protruding portion provided on the inner side of the cam engaging portion 61, and a hole engaged with the protruding portion is provided on the proximal end side of the swing tab 8, and the protruding portion is fitted into the hole on the proximal end side of the swing tab 8. Each side of the protruding portion is preferably a right-angle surface, so that the protruding portion and the swing pull piece 8 are matched with each other in stability, and accidental slipping of the protruding portion and the swing pull piece is avoided. Preferably, the protruding portion is disposed at a central position of the swing pull rod 6 along an axial direction, that is, a distance from a center of the protruding portion to a distal end of the swing pull rod 6 is equal to a distance from a center of the protruding portion to a proximal end of the swing pull rod 6, and when the swing pull rod 6 pulls the swing pull piece 8 to axially move, lateral deflection of the swing pull rod 6 caused by external force is further avoided. In another alternative embodiment, the tab engaging portion 63 may be a groove provided on the inner side of the cam engaging portion 61, the proximal end side of the swing tab 8 is provided with a protruding portion engaged with the groove, the protruding portion is fitted in the groove, and the groove is preferably provided at the center position of the swing link 6 in the axial direction. In this embodiment, the inner side of the eccentric wheel matching part 61 is a plane parallel to the axial direction of the anastomat, so that the sheet-shaped structure of the swing pull tab 8 can be better adapted.

The principle of the swing operation of the swing mechanism of this embodiment will be specifically described with reference to fig. 8 to 10.

As shown in fig. 8, in the transverse direction of the anastomat, the two guiding portions 62 are respectively connected to the middle portions of the distal end face and the proximal end face of the eccentric wheel matching portion 61, so that the limiting action of the guiding groove 33 on the guiding portions 62 can act on each position of the swing rod 6 more evenly, and further, the swing rod 6 is kept from deflecting transversely due to the rotation movement of the eccentric wheel portion 53 during the movement. The third mating hole of the eccentric wheel mating portion 61 is a kidney-shaped hole 611 including two arcuate sides and two straight sides, the radius of the arcuate sides is equal to the radius of the eccentric wheel portion 53, and the two straight sides of the kidney-shaped hole 611 extend in the transverse direction of the stapler. In another alternative embodiment, the kidney-shaped hole 611 may have a shape different from that shown in fig. 9, so long as the eccentric portion 53 is driven to push the eccentric engaging portion 61 to move in the axial direction when the eccentric portion 53 is rotated. Fig. 8 shows the engagement structure of the driving wheel 4, the driven wheel 5 and the oscillating bar 6 in the initial state. In the initial state, the central axes O1 of the eccentric wheel portions 53 of the driven wheels 5 are located outside the corresponding driven wheel rotation shafts 51. Thus, when the driving wheel 4 drives the driven wheels 5 to rotate, the two driven wheels 5 can drive the two swing links 6 to move in opposite directions. In another alternative embodiment, in the initial state, the central axes of the eccentric portions 53 of the driven wheels 5 may be located inside the corresponding driven wheel rotation shafts 51.

As shown in fig. 9, in the initial state, when the driving wheel 4 is operated to rotate 15 ° in the R3 direction, the driving wheel 4 drives the driven wheel 5 to rotate in the R4 direction by an angle (the angle depends on the gear ratio of the driving wheel 4 and the driven wheel 5). The upper swing rod 6 shown in fig. 9 moves in the W1 direction, i.e., in the distal direction, as compared to fig. 8, and the lower swing rod 6 moves in the W2 direction, i.e., in the proximal direction, as compared to fig. 8, so that the stud 9 can swing in the R1 direction as shown in fig. 1.

As shown in fig. 10, in the initial state, when the driving wheel 4 is operated to rotate 30 ° in the R5 direction, the driving wheel 4 drives the driven wheel 5 to rotate in the R6 direction by an angle (the angle depends on the gear ratio of the driving wheel 4 and the driven wheel 5). The upper swing rod 6 shown in fig. 10 moves in the W3 direction, i.e., moves in the proximal direction, as compared to fig. 8, and the lower swing rod 6 moves in the W4 direction, i.e., moves in the distal direction, as compared to fig. 8, so that the stud 9 can swing in the R2 direction shown in fig. 1. As can be seen by comparing fig. 9 and 10, when the driving wheel 4 is rotated in different directions, it is possible to realize different directions of rotation of the staple head 9. When the rotation angles of the driving wheels 4 are different, the movement displacement of the swing head pull rod 6 is different, so that the swing angles of the nail head 9 are also different. The larger the rotation angle of the driving wheel 4 is, the larger the movement displacement of the swing head pull rod 6 is, and the larger the swing angle of the nail head 9 is, so that the swing direction and the swing angle of the nail head 9 can be flexibly controlled.

The structure of the locking member 76 and the fixing member 7 of the present invention will be specifically described with reference to fig. 11 to 14.

As shown in fig. 11 and 12, the locking member 76 is rod-shaped, and the locking member 76 is parallel to the central axis of the capstan 4. The fixing member 7 includes two of the driven wheel supporting portions 75. An axially extending second passage 79 is formed between the two driven wheel supports 75 to provide a second passage 79 therethrough for the proximal end of the sleeve 11. The fixing member 7 is provided with two locking members 76, the two locking members 76 are symmetrically arranged relative to the axis of the anastomat, the two locking members 76 are respectively arranged between two driven wheel supporting parts 75 and the driving wheel supporting parts 74, and the connecting parts 762 of the locking members 76 are connected with the driving wheel supporting parts 74 through first connecting arms 77 and connected with one driven wheel supporting part 75 through second connecting arms 78. By fixing the lock member 76 between the driving wheel support 74 and the driven wheel support 75 by the first connecting arm 77 and the second connecting arm 78, the structural stability of the fixation of the lock member 76 with the fixing member 7 can be improved. In one embodiment, the locking member 76, the first connecting arm 77, and the second connecting arm 78 may be integrally formed with the driving wheel support 74 and the driven wheel support 75. In another embodiment, the first connecting arm 77 and the second connecting arm 78 may be connected to the driving wheel support 74 and the driven wheel support 75 by welding. In yet another alternative embodiment, the first connecting arm 77 and the second connecting arm 78 may be integrally formed with the driving wheel support 74 and the driven wheel support 75, and integrally formed with the connecting portion 762 of the locking member 76.

As shown in fig. 13 and 14, in this embodiment, the first connecting arm 77 is perpendicular to the second connecting arm 78. Therefore, when the locking member 76 is elastically deformed by the driving of the tooth portion of the driving wheel 4, the distal end of the connecting portion 762 of the locking member 76 is held in a stable position by the first connecting arm 77 and the second connecting arm 78, and no axial and lateral movement occurs.

As shown in fig. 14, in this embodiment, the locking portion 761 includes two inclined guide surfaces 7611, and when the locking portion 761 is engaged with the driving wheel 4 teeth, the guide surfaces 7611 of the locking portion 761 at least partially enter between the adjacent two driving wheel 4 teeth, and the two guide surfaces 7611 are respectively opposite to the side surfaces of the adjacent two driving wheel 4 teeth. When the operator operates the knob to rotate the driving wheel 4, the driving wheel 4 teeth exert a force on the guide surface 7611, the force is decomposed by the guide surface 7611 to obtain a force for driving the locking portion 761 away from the driving wheel 4, and the guide surface 7611 can better guide the disengagement of the locking portion 761 from the driving wheel tooth portion 42.

In another alternative embodiment, the locking portion 761 may be formed as an integral arc surface toward the side of the driving gear tooth portion 42, and when the locking portion 761 engages with the driving gear tooth portion 42, the arc surface of the driving gear tooth portion 42 at least partially enters between two adjacent driving gear teeth 4. When the operator operates the knob to rotate the driving wheel 4, the teeth of the driving wheel 4 exert a force on the guiding surface 7611, the force is decomposed by the circular arc surface to obtain a force for driving the locking portion 761 away from the driving wheel 4, and the circular arc surface can better guide the locking portion 761 to be separated from the driving wheel tooth portion 42.

The structural relationship between the fixing member 7 of the present invention and the other respective components will be specifically described with reference to fig. 15 to 18. As shown in fig. 15 and 16, the inner surface of the first housing 3 and the inner surface of the second housing 2 are provided with a first fixing hole 32 and a second fixing hole 22, respectively, a first end 511 and a second end 512 of the driven wheel rotation shaft 51 enter the first fixing hole 32 and the second fixing hole 22, respectively, and the driven wheel 5 is rotatable about the driven wheel rotation shaft 51. Here, the driven gear tooth portion 52 and the eccentric wheel portion 53 may be rotatably fixed around the driven gear rotation shaft 51 to the second fixing hole 22 and the first fixing hole 32, the driven gear tooth portion 52 and the eccentric wheel portion 53 may be rotatable with respect to the driven gear rotation shaft 51, the driven gear rotation shaft 51 may be rotatably fitted into the second fixing hole 22 and the first fixing hole 32, the driving gear tooth portion 42 and the eccentric wheel portion 53 may be non-rotatably fitted around the driven gear rotation shaft 51, and the driving gear tooth portion 42 and the eccentric wheel portion 53 may be rotatable around the axis of the driven gear rotation shaft 51 together with the driven gear rotation shaft 51.

As shown in fig. 15, the surface of the second housing 2 is provided with a receiving hole 21, and the knob 41 is exposed to the outside of the second housing 2 through the receiving hole 21. The fixing element 7 at least partially enters the receiving space of the second housing 2. The inner surface of the second housing 2 is provided with at least one limiting member 23, the limiting member 23 is distributed on the outer side of the driven wheel supporting portion 75, and the limiting member 23 limits the axial movement of the driven wheel supporting portion 75.

As shown in fig. 16 and 17, a yielding groove 741 is formed on a side of the driving wheel supporting portion 74 facing the inner surface of the first housing 3, a sleeve limiting portion 35 is disposed at a position of the inner surface of the first housing 3 corresponding to the yielding groove 741, the yielding groove 741 and the sleeve limiting portion 35 enclose a first channel 30 extending in an axial direction, and a sleeve 11 sleeved outside the swing pull piece 8 passes through the first channel 30. The surface of the relief groove 741 is preferably an arc surface, and the surface of the sleeve stopper 35 is also preferably an arc surface, so that the first channel 30 is a cylindrical channel formed by surrounding, and thus, the first channel is better matched with the outer side surface of the cylindrical sleeve 11, and can also well support the sleeve 11.

As shown in fig. 15 to 17, a third fixing portion 72 is provided on a side of the drive wheel supporting portion 74 facing the inner surface of the first housing 3, a fourth fixing portion 31 is provided on the inner surface of the first housing 3, and the third fixing portion 72 and the fourth fixing portion 31 form an embedded connection. In this embodiment, the third fixing portion 72 is a second fixing post protruding toward the inner surface of the first housing 3, the fourth fixing portion 31 is a first supporting seat disposed on the inner surface of the first housing 3, a first mating hole is formed in the center of the first supporting seat, and the second fixing post at least partially enters the first mating hole. The third fixing portion 72 and the fourth fixing portion 31 form a non-relatively rotatable connection, for example, an interference fit may be formed between the third fixing portion 72 and the fourth fixing portion 31. Further, since the driving wheel supporting portion 74 is provided with two third fixing portions 72 arranged in a lateral direction, and the first housing 3 is provided with two fourth fixing portions 31 arranged in a lateral direction, the third fixing portions 72 and the fourth fixing portions 31 may be further prevented from rotating. In another alternative embodiment, the third fixing portion 72 may include a first mating hole, and the fourth fixing portion 31 may be a fixing post protruding toward the driving wheel supporting portion 74, or a fixing hole corresponding to the second fixing post may be directly provided on the inner surface of the first housing 3.

As shown in fig. 15 to 17, a fifth fixing portion 73 is provided on a side of the driven wheel supporting portion 75 facing the inner surface of the first housing 3, a sixth fixing portion 34 is provided on the inner surface of the first housing 3, and the fifth fixing portion 73 and the sixth fixing portion 34 form an embedded connection. In this embodiment, the fifth fixing portion 73 is a third fixing post protruding toward the inner surface of the first housing 3, the sixth fixing portion 34 is a second supporting seat disposed on the inner surface of the first housing 3, a second mating hole is formed in the center of the second supporting seat, and the third fixing post at least partially enters the second mating hole. The fifth fixing portion 73 forms a non-rotatable connection with the sixth fixing portion 34, for example, an interference fit may be provided between the third fixing portion 72 and the fourth fixing portion 31. Further, since the fixing member 7 is provided with two fifth fixing portions 73 arranged in a lateral direction, and the first housing 3 is provided with two sixth fixing portions 34 arranged in a lateral direction, the fifth fixing portions 73 and the sixth fixing portions 34 may be further prevented from rotating. In another alternative embodiment, the fifth fixing portion 73 may include a second mating hole, and the sixth fixing portion 34 may be a fixing post protruding toward the driven wheel supporting portion 75, or a fixing hole corresponding to the third fixing post may be provided directly on the inner surface of the first housing 3.

As shown in fig. 17, a first fixing portion 71 is disposed on a side of the driving wheel support portion 74 facing the driving wheel 4, as shown in fig. 18, a second fixing portion 43 is disposed on a side of the driving wheel 4 facing the fixing member 7, and the first fixing portion 71 and the second fixing portion 43 form an embedded connection. In this embodiment, the first fixing portion 71 is a first fixing post disposed on the driving wheel supporting portion 74 and protruding toward the driving wheel 4, the second fixing portion 43 is a cylindrical groove formed on a side facing the fixing member 7, the groove is disposed coaxially with the driving wheel 4, and the first fixing post at least partially enters the groove, and enables the driving wheel 4 to rotate relative to the first fixing portion 71. In another alternative embodiment, the first fixing portion may be a groove disposed on a side of the driving wheel support portion 74 facing the driving wheel 4, and the second fixing portion may be a first fixing column disposed on the driving wheel 4 protruding toward the fixing member, the first fixing column and the driving wheel 4 are coaxially disposed, and the first fixing column at least partially enters the groove.

As shown in fig. 18 to 20, the driven wheel supporting portion 75 of the fixing member 7 is provided with a through hole 751, the driven wheel rotation shaft 51 passes through the through hole 751, and the eccentric wheel portion 53 of the driven wheel 5 passes through the through hole 751 and then is engaged with the eccentric wheel engagement portion 61 of the swing link 6. As shown in fig. 20, the axial length of the through hole 751 of the driven wheel supporting part 75 is greater than the radius of the eccentric wheel part 53 and greater than the axial length of the kidney-shaped hole 611 of the eccentric wheel fitting part 61, and the through hole 751 can provide a sufficient space for the eccentric rotation of the eccentric wheel part 53 and the axial movement of the eccentric wheel fitting part 61 when the eccentric wheel part 53 rotates. The guide portion 62 abuts against the distal end side wall and the proximal end side wall of the through hole 751 of the driven pulley support portion 75 in the longitudinal direction to maintain a relatively stable positional relationship between the fixing piece 7 and the swing link 6.

The above embodiment is described taking the locking member and the driving wheel in the gear set as an example. In another embodiment as shown in fig. 21, a locking member 710 is provided, the locking member 710 cooperates with the driven wheel 5 in the gear set, the locking member 710 includes a locking portion 7101 and a connecting portion 7102, and the connecting portion 7102 is connected to the driving wheel supporting portion 74 and/or the driven wheel supporting portion 75. As shown in fig. 21, when the driving wheel 4 and/or the driven wheel 5 is not subject to an external force, the locking portion 7101 of the locking member 710 is engaged with the driven wheel tooth portion 52 to block the rotation of the driven wheel 5, and when the driving wheel and/or the driven wheel is driven to rotate by the external force, the locking portion 7101 moves in a direction away from the driven wheel tooth portion 52 under the action of the driven wheel tooth portion 52 without blocking the rotation of the driven wheel 52. The number of the locking members 710 may be one, two or more, and may be matched with only one driven wheel 5, or may be matched with two driven wheels 5 respectively.

In this embodiment, the locking member 710 is at least partially elastic, and when the driving wheel 4 and/or the driven wheel 5 are/is driven to rotate by an external force, the locking portion 7101 is elastically deformed by the driven wheel tooth portion 52 to move away from the driven wheel tooth portion 52, and when the driven wheel 5 stops rotating, the locking portion 52 is re-engaged with the driven wheel tooth portion 52 by an elastic restoring force.

In this embodiment, the follower teeth portion 52 includes a plurality of follower teeth, the locking portion 7101 includes two inclined guide surfaces or includes one arc surface, and when the locking portion 7101 is engaged with the follower teeth portion 52, the guide surfaces or the arc surfaces of the locking portion 7101 at least partially enter between two adjacent follower teeth, and the two guide surfaces are respectively opposite to the side surfaces of the two adjacent follower teeth or the arc surfaces are opposite to the side surfaces of the follower teeth.

The other components of this embodiment are the same as those of the embodiment of fig. 1 to 20, and will not be described again here.

In a further alternative embodiment, it is also possible to provide both the locking element 76 of fig. 1 to 20 and the locking element 7101 of fig. 21, i.e. the locking element cooperates with both the driving wheel 4 and the driven wheel 5, and is within the scope of the invention.

In the above embodiment, the connecting portions of the locking member are connected to the fixing member. In other alternative embodiments, the securing element of the locking element may be connected to other locations, for example directly to the inner surface of the housing or to another component fixedly provided on the housing.

The foregoing is a further detailed description of the invention in connection with the preferred embodiments, and it is not intended that the invention be limited to the specific embodiments described. It will be apparent to those skilled in the art that several simple deductions or substitutions may be made without departing from the spirit of the invention, and these should be considered to be within the scope of the invention.

Claims (19)

1. A swing mechanism for a medical stapler, the swing mechanism comprising:

the gear set comprises a driving wheel and a driven wheel, the driving wheel comprises a driving gear tooth part, the driven wheel comprises a driven gear tooth part and a first matching part, and the driven gear tooth part is meshed with the driving gear tooth part;

the swing head pull rod comprises a second matching part and a pull piece matching part, the second matching part is matched with the first matching part, the swing head pull piece is connected to the pull piece matching part of the swing head pull rod, so that when the driven wheel rotates, the swing head pull rod is driven to move along the axial direction of the anastomat, and the swing head pull rod drives the swing head pull piece to move along the axial direction through the pull piece matching part; and

The locking piece comprises a locking part;

when the driving wheel and/or the driven wheel are not driven by external force, the locking part is meshed with the driving wheel tooth part and/or the driven wheel tooth part to prevent the rotation of the driving wheel and/or the driven wheel, and when the driving wheel and/or the driven wheel are driven by external force to rotate, the locking part moves in a direction away from the driving wheel tooth part and/or the driven wheel tooth part under the action of the driving wheel tooth part and/or the driven wheel tooth part without preventing the rotation of the driving wheel and/or the driven wheel.

2. The swing mechanism according to claim 1, wherein the locking member is at least partially elastic, and when the driving wheel and/or the driven wheel are/is rotated by an external force, the locking portion is elastically deformed by the driving wheel tooth portion and/or the driven wheel tooth portion to move in a direction away from the driving wheel tooth portion and/or the driven wheel tooth portion, and when the driving wheel and/or the driven wheel stops rotating, the locking portion is re-engaged with the driving wheel tooth portion and/or the driven wheel tooth portion by an elastic restoring force.

3. The swing mechanism according to claim 1, wherein the driving gear tooth portion includes a plurality of driving gear teeth, the locking portion includes two inclined guide surfaces, the guide surfaces of the locking portion at least partially enter between adjacent two driving gear teeth when the locking portion is engaged with the driving gear tooth portion, and the two guide surfaces are respectively opposite to side surfaces of the adjacent two driving gear teeth;

alternatively, the driven gear tooth portion includes a plurality of driven gear teeth, the locking portion includes two inclined guide surfaces, and when the locking portion is engaged with the driven gear tooth portion, the guide surfaces of the locking portion at least partially enter between two adjacent driven gear teeth, and the two guide surfaces are respectively opposite to the side surfaces of the two adjacent driven gear teeth.

4. The swing mechanism according to claim 1, wherein the driving gear tooth portion includes a plurality of driving gear teeth, a side of the locking portion facing the driving gear tooth portion is an arc surface, and when the locking portion is engaged with the driving gear tooth portion, the arc surface of the locking portion at least partially enters between two adjacent driving gear teeth;

or, the driven gear tooth portion includes a plurality of driven gear teeth, one side of the locking portion facing the driven gear tooth portion is an arc surface, and when the locking portion is meshed with the driven gear tooth portion, the arc surface of the locking portion at least partially enters between two adjacent driven gear teeth.

5. The swing mechanism according to claim 1, wherein the locking member is rod-shaped and the locking member is parallel to a central axis of the driving wheel and/or the driven wheel.

6. The swing mechanism according to claim 1, further comprising a housing and a fixture, the housing including a receiving cavity for receiving the gear set, the fixture, and the swing rod, the housing including a first inner surface and a second inner surface surrounding the receiving cavity, the fixture being secured to the housing, the fixture including a third surface facing the first inner surface and a fourth surface facing the second inner surface, the gear set being at least partially disposed between the second inner surface of the housing and the fourth surface of the fixture;

the locking piece further comprises a connecting part, and at least part of the locking part is connected with the fixing piece through the connecting part.

7. The swing mechanism of claim 6, wherein the swing link is located between the third surface of the mount and the first inner surface of the housing.

8. The swing mechanism according to claim 7, wherein the securing member includes a drive wheel support portion and a driven wheel support portion, the drive wheel support portion being located between the drive wheel and the first inner surface of the housing, the driven wheel support portion being located between the driven wheel and the first inner surface of the housing, the connecting portion of the locking member being connected to the drive wheel support portion, and/or the connecting portion of the locking member being connected to the driven wheel support portion.

9. The swing mechanism according to claim 8, wherein the gear train includes two driven wheels, the swing mechanism includes two swing links and two swing tabs, the driving wheel rotates to drive the two swing links to move axially through the driven wheels, and the two swing links move in opposite directions, and the fixing member includes two driven wheel supporting portions.

10. The swing mechanism according to claim 8, including two of said locking members disposed between two of said driven wheel support portions and said drive wheel support portion, respectively, the connecting portions of each of said locking members being connected to said drive wheel support portion by a first connecting arm and to one of said driven wheel support portions by a second connecting arm.

11. The swing mechanism according to claim 10, wherein said first connecting arm is perpendicular to said second connecting arm.

12. The swing mechanism according to claim 8, wherein the first mating portion is an eccentric portion, the second mating portion is an eccentric portion mating portion, the swing rod is located between the third surface of the fixing member and the first inner surface of the housing, the driven wheel supporting portion of the fixing member is provided with a through hole, and the eccentric portion of the driven wheel mates with the eccentric portion of the swing rod after passing through the through hole;

In the initial state, the central shafts of the eccentric wheel parts of the two driven wheels are positioned at the outer sides of the corresponding driven wheel rotating shafts, or in the initial state, the central shafts of the eccentric wheel parts of the two driven wheels are positioned at the inner sides of the corresponding driven wheel rotating shafts.

13. The swing mechanism according to claim 12, wherein the eccentric wheel fitting portion is provided with a fitting groove or a third fitting hole, the eccentric wheel portion at least partially enters the fitting groove or the third fitting hole, and the eccentric wheel is fitted with the fitting groove or the third fitting hole to drive the swing pull rod to move in the axial direction;

the axial length of the through hole of the driven wheel supporting part is larger than the radius of the eccentric wheel part and is larger than the axial length of the matching groove or the third matching hole of the eccentric wheel matching part.

14. The swing mechanism according to claim 8, wherein a relief groove is formed in a side of the drive wheel supporting portion facing the first inner surface of the housing, a sleeve limiting portion is formed in a position of the housing opposite to the relief groove, and the relief groove and the sleeve limiting portion enclose a first axial channel; and/or the number of the groups of groups,

A second channel along the axial direction is formed between the two driven wheel supporting parts.

15. The swing mechanism according to claim 8, wherein a first fixing portion is provided on a side of the drive wheel supporting portion facing the drive wheel, a second fixing portion is provided on a side of the drive wheel facing the fixing member, the first fixing portion and the second fixing portion form an embedded connection, and the drive wheel is rotatable relative to the first fixing portion.

16. The swing mechanism according to claim 15, wherein the first fixing portion is a first fixing post provided on the driving wheel supporting portion and protruding toward the driving wheel, the second fixing portion is a groove provided on a side of the driving wheel facing the fixing member, the groove and the driving wheel are coaxially arranged, and the first fixing post at least partially enters the groove; or alternatively, the first and second heat exchangers may be,

the first fixing part is a groove arranged on one side of the driving wheel supporting part, which faces the driving wheel, the second fixing part is a first fixing column arranged on the first fixing column, which faces the fixing piece, and protrudes out, the first fixing column and the driving wheel are coaxially arranged, and at least part of the first fixing column enters the groove.

17. The swing mechanism according to claim 8, wherein a third fixing portion is provided on a side of the drive wheel supporting portion facing the first inner surface of the housing, a fourth fixing portion is provided on the first inner surface of the housing, and the third fixing portion and the fourth fixing portion form an embedded connection; and/or the number of the groups of groups,

a fifth fixing part is arranged on one side, facing the first inner surface of the shell, of the driven wheel supporting part, a sixth fixing part is arranged on the first inner surface of the shell, and the fifth fixing part and the sixth fixing part are connected in an embedded mode.

18. The swing mechanism according to claim 17, wherein the third fixing portion is a second fixing post protruding toward the first inner surface of the housing, the fourth fixing portion is a first supporting seat provided on the first inner surface of the housing, a first fitting hole is provided in the center of the first supporting seat, the second fixing post at least partially enters the first fitting hole, or the third fixing portion includes a first fitting hole, the fourth fixing portion is a second fixing post provided on the housing toward the driving wheel supporting portion, and the second fixing post at least partially enters the first fitting hole;

The fifth fixing portion is a third fixing column protruding towards the first inner surface of the shell, the sixth fixing portion is a second supporting seat arranged on the first inner surface of the shell, a second matching hole is formed in the center of the second supporting seat, the third fixing column at least partially enters the second matching hole, or the fifth fixing portion comprises a second matching hole, the sixth fixing portion is a third fixing column arranged on the shell and facing the driven wheel supporting portion, and the third fixing column at least partially enters the second matching hole.

19. A medical stapler comprising the swing mechanism of any one of claims 1 to 18.

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