Swing mechanism and medical anastomat

Abstract

This invention provides a swing head mechanism and a medical stapler. The swing head mechanism includes a gear set comprising a driving gear and a driven gear, the driving gear teeth meshing with the driven gear teeth; a swing head lever and a swing head pull plate, the pull plate being connected to the pull plate mating part of the lever. When the driven gear rotates, the lever further drives the pull plate to move axially along the stapler; and a locking element, including a locking part. This invention can easily and conveniently realize the swinging of the staple head relative to the stapler body. Furthermore, when not subjected to external force, the locking part meshes with the driving gear teeth and / or the driven gear teeth to prevent rotation, improving the positional stability of the staple head and avoiding uncontrollable swinging. When the driving gear and / or the driven gear are driven to rotate by external force, the locking part moves away from the driving gear teeth and / or the driven gear teeth without obstructing rotation, and does not affect the function of the swing head mechanism.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, specifically to a head-swinging mechanism and a medical stapler. Background Technology

[0002] In the prior art, a medical stapler includes a stapler body, a firing handle movably connected to the stapler body, and an anvil assembly that cooperates with the stapler body. The stapler body includes a firing assembly and a staple cartridge assembly located on the distal side. During the operation, two tissue segments to be anastomosed are placed between the anvil of the anvil assembly and the staple cartridge of the staple cartridge assembly. The distance between the anvil and the staple cartridge is adjusted to gradually clamp the tissue. Then, the firing handle drives the firing assembly to form the staples on the anvil, completing the anastomosis connection of the two tissue segments.

[0003] To adapt to the needs of more surgical scenarios, the staple head needs to have more angle options relative to the stapler body. Therefore, a swing mechanism can be set between the stapler body and the staple head. The swing mechanism includes a swing pull plate, the distal end of which is connected to the staple head. When the swing pull rod is driven to move along the axial direction of the stapler, the distal end of the swing pull rod causes the staple head to swing clockwise or counterclockwise relative to the stapler body.

[0004] Existing head-swing mechanisms are generally complex in structure, and it is difficult to set the swing angle when the head swings. During use, the staple head may also swing uncontrollably, resulting in an uncontrollable swing angle of the staple head. This makes it impossible for the staple head of the stapler to be accurately positioned, affecting the surgical outcome.

[0005] In this invention, the distal and proximal sides are relative to the operator. The end closer to the operator is the proximal side, and the end farther from the operator, i.e., closer to the surgical position, is the distal side. In the stapler, the inner and outer sides are relative to the axis of the stapler. The side closer to the axis is the inner side, and the side farther from the axis is the outer side. Summary of the Invention

[0006] In view of the problems in the prior art, the purpose of the present invention is to provide a swing head mechanism and a medical stapler, which can easily and conveniently realize the swing of the staple head relative to the stapler body, improve the positional stability of the staple head, and avoid uncontrollable swing.

[0007] This invention provides a tilting head mechanism for a medical stapler, the tilting head mechanism comprising:

[0008] A gear set includes a driving gear and a driven gear. The driving gear includes driving gear teeth, and the driven gear includes driven gear teeth and a first mating part. The driven gear teeth mesh with the driving gear teeth.

[0009] The device includes a swing head pull rod and a swing head pull plate. The swing head pull rod includes a second mating part and a pull plate mating part. The second mating part mates with the first mating part. The swing head pull plate is connected to the pull plate mating part of the swing head pull rod, so that when the driven wheel rotates, it drives the swing head pull rod to move axially along the anastomosis device. Furthermore, the swing head pull rod drives the swing head pull plate to move axially through the pull plate mating part.

[0010] Locking element, including locking part;

[0011] When the driving wheel and / or the driven wheel are not subjected to external force, the locking part engages with the teeth of the driving wheel and / or the teeth of the driven wheel to prevent the rotation of the driving wheel and / or the driven wheel. When the driving wheel and / or the driven wheel are driven to rotate by external force, the locking part moves away from the teeth of the driving wheel and / or the driven wheel under the action of the teeth of the driving wheel and / or the driven wheel, without preventing the rotation of the driving wheel and / or the driven wheel.

[0012] In some embodiments, the locking member is at least partially elastic. When the driving wheel and / or the driven wheel rotates under the action of an external force, the locking part undergoes elastic deformation under the action of the driving wheel teeth and / or the driven wheel teeth and moves away from the driving wheel teeth and / or the driven wheel teeth. When the driving wheel and / or the driven wheel stops rotating, the locking part re-engages with the driving wheel teeth and / or the driven wheel teeth under the action of an elastic restoring force.

[0013] In some embodiments, the driving gear tooth portion includes a plurality of driving gear teeth, and the locking portion includes two inclined guide surfaces. When the locking portion engages with the driving gear tooth portion, the guide surfaces of the locking portion at least partially enter between two adjacent driving gear teeth, and the two guide surfaces are respectively opposite to the sides of two adjacent driving gear teeth.

[0014] Alternatively, the driven gear tooth portion includes a plurality of driven gear teeth, and the locking portion includes two inclined guide surfaces. When the locking portion engages 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 sides of two adjacent driven gear teeth.

[0015] In some embodiments, the driving gear tooth portion includes a plurality of driving gear teeth, and the side of the locking portion facing the driving gear tooth portion is an arc surface. When the locking portion meshes with the driving gear tooth portion, the arc surface of the locking portion at least partially enters between two adjacent driving gear teeth.

[0016] Alternatively, the driven gear teeth may include a plurality of driven gear teeth, and the locking part facing the driven gear teeth may be an arc surface. When the locking part engages with the driven gear teeth, the arc surface of the locking part may at least partially enter between two adjacent driven gear teeth.

[0017] In some embodiments, the locking member is rod-shaped and parallel to the central axis of the driving wheel and / or the driven wheel.

[0018] In some embodiments, the device further includes a housing and a fastener. The housing includes a receiving cavity for accommodating the gear set, the fastener, and the sway bar. The housing includes a first inner surface and a second inner surface surrounding the receiving cavity. The fastener is fixed to the housing and includes a third surface facing the first inner surface and a fourth surface facing the second inner surface. The gear set is at least partially disposed between the second inner surface of the housing and the fourth surface of the fastener.

[0019] The locking member further includes a connecting portion, and at least a portion of the locking portion is connected to the fixing member via the connecting portion.

[0020] In some embodiments, the oscillating pull rod is located between the third surface of the fixing member and the first inner surface of the housing.

[0021] In some embodiments, the fixing 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.

[0022] In some embodiments, the gear set includes two driven wheels, the oscillating head mechanism includes two oscillating head rods and two oscillating head pull plates, and when the driving wheel rotates, it drives the two oscillating head rods to move axially through the driven wheels, and the two oscillating head rods move in opposite directions. The fixing member includes two driven wheel support portions.

[0023] In some embodiments, two locking members are included, which are respectively disposed between two driven wheel support portions and a driving wheel support portion. The connecting portion of each locking member is connected to the driving wheel support portion via a first connecting arm and to a driven wheel support portion via a second connecting arm.

[0024] In some embodiments, the first connecting arm is perpendicular to the second connecting arm.

[0025] In some embodiments, the first mating part is an eccentric wheel part, the second mating part is an eccentric wheel mating part, the swing head rod is located between the third surface of the fixing member and the first inner surface of the housing, the driven wheel support part of the fixing member is provided with a through hole, and the eccentric wheel part of the driven wheel passes through the through hole and mates with the eccentric wheel mating part of the swing head rod;

[0026] In the initial state, the central axes of the eccentric wheel portions of both driven wheels are located outside the corresponding driven wheel rotation axis, or in the initial state, the central axes of the eccentric wheel portions of both driven wheels are located inside the corresponding driven wheel rotation axis.

[0027] In some embodiments, the eccentric wheel mating part is provided with a mating groove or a third mating hole, and the eccentric wheel part at least partially enters the mating groove or the third mating hole. The eccentric wheel and the mating groove or the third mating hole are mated to drive the swing head rod to move axially.

[0028] The axial length of the through hole of the driven wheel support is greater than the radius of the eccentric wheel and greater than the axial length of the mating groove or the third mating hole of the eccentric wheel mating part.

[0029] In some embodiments, the drive wheel support portion is provided with a clearance groove on the side facing the first inner surface of the housing, and a sleeve limiting portion is provided on the housing opposite to the clearance groove, the clearance groove and the sleeve limiting portion forming a first channel along the axial direction; and / or,

[0030] A second channel along the axial direction is formed between the two driven wheel supports.

[0031] In some embodiments, the drive wheel support is provided with a first fixing part on the side facing the drive wheel, and the drive wheel is provided with a second fixing part on the side facing the fixing member. The first fixing part and the second fixing part are embeddedly connected, and the drive wheel can rotate relative to the first fixing part.

[0032] In some embodiments, the first fixing part is a first fixing post protruding from the drive wheel support part toward the drive wheel, and the second fixing part is a groove formed on the side of the drive wheel toward the fixing member, the groove being coaxially arranged with the drive wheel, and the first fixing post at least partially entering the groove; or,

[0033] The first fixing part is a groove provided on the side of the drive wheel support part facing the drive wheel, and the second fixing part is a first fixing post provided on the drive wheel protruding towards the fixing member. The first fixing post is coaxially arranged with the drive wheel, and the first fixing post at least partially enters the groove.

[0034] In some embodiments, a third fixing part is provided on the side of the drive wheel support facing the first inner surface of the housing, and a fourth fixing part is provided on the first inner surface of the housing, wherein the third fixing part and the fourth fixing part are embeddedly connected; and / or,

[0035] A fifth fixing part is provided on the side of the driven wheel support facing the first inner surface of the housing, and a sixth fixing part is provided on the first inner surface of the housing. The fifth fixing part and the sixth fixing part are embedded together.

[0036] In some embodiments, the third fixing part is a second fixing post protruding toward the first inner surface of the housing, and the fourth fixing part is a first support seat disposed on the first inner surface of the housing, wherein the first support seat has a first mating hole at its center, and the second fixing post at least partially enters the first mating hole; or, the third fixing part includes the first mating hole, and the fourth fixing part is a second fixing post disposed on the housing toward the drive wheel support part, wherein the second fixing post at least partially enters the first mating hole;

[0037] The fifth fixing part is a third fixing post protruding toward the first inner surface of the housing, and the sixth fixing part is a second support seat disposed on the first inner surface of the housing. The second support seat has a second mating hole at its center, and the third fixing post at least partially enters the second mating hole. Alternatively, the fifth fixing part includes the second mating hole, and the sixth fixing part is a third fixing post disposed on the housing toward the driven wheel support part, and the third fixing post at least partially enters the second mating hole.

[0038] This invention also provides a medical stapler, including the aforementioned swing head mechanism.

[0039] The head-swinging mechanism and medical stapler provided by this invention have the following advantages:

[0040] By employing this invention, the driven wheel is driven to rotate by the driving wheel, and the rotational motion is converted into axial motion through the cooperation of the driven wheel and the swing head lever. The swing head lever then drives the swing head pull plate to move axially, thus easily and conveniently achieving the swinging of the staple head relative to the stapler body. When no external force is applied, the locking part blocks the rotation of the driving wheel, improving the positional stability of the staple head and preventing uncontrollable swaying. Furthermore, when the driving wheel's operating part is operated to drive its rotation, the locking part moves away from the driving wheel teeth under the force of the driving wheel teeth without obstructing the rotation of the driving wheel, and does not affect the normal operation of the swing head control function. Attached Figure Description

[0041] Other features, objects, and advantages of the invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings.

[0042] Figure 1 This is a top view of a medical stapler according to an embodiment of the present invention;

[0043] Figure 2 This is a schematic diagram of the structure of the head-swinging mechanism after omitting the second housing and cooperating with the anastomosis device body according to an embodiment of the present invention;

[0044] Figure 3 This is a schematic diagram of the structure of the head-swinging mechanism after omitting the first housing and cooperating with the anastomosis device body according to an embodiment of the present invention;

[0045] Figure 4 This is a schematic diagram of the structure of the omitting housing rear swing head mechanism according to an embodiment of the present invention;

[0046] Figure 5 This is a schematic diagram of the swing head mechanism according to an embodiment of the present invention, omitting the housing;

[0047] Figure 6 This is a front view of the swing mechanism of an embodiment of the present invention, omitting the housing;

[0048] Figure 7 This is a top view of the swing mechanism of an embodiment of the present invention, omitting the housing;

[0049] Figure 8 This is a schematic diagram of the gear set and the swing head tie rod in the initial state according to an embodiment of the present invention;

[0050] Figure 9 This is a schematic diagram of the gear set and the swing head lever cooperating when the control nail head swings along the R1 direction according to an embodiment of the present invention;

[0051] Figure 10 This is a schematic diagram of the gear set and the swing head lever cooperating when the control nail head swings along the R2 direction according to an embodiment of the present invention;

[0052] Figure 11 and Figure 12 This is a schematic diagram of the structure of a fastener according to an embodiment of the present invention;

[0053] Figure 13 This is a top view of a fastener according to an embodiment of the present invention;

[0054] Figure 14 yes Figure 13 Enlarged view of point A in the middle;

[0055] Figure 15 This is a schematic diagram of the structure of the fastener and the second housing in one embodiment of the present invention;

[0056] Figure 16 This is a schematic diagram of the structure of the first housing according to an embodiment of the present invention;

[0057] Figure 17 This is a schematic diagram of the structure of the fastener and the first housing in one embodiment of the present invention;

[0058] Figure 18 This is a schematic diagram of the structure of a gear set according to an embodiment of the present invention;

[0059] Figure 19 This is a schematic diagram of the structure of the fixing member and the driving wheel in one embodiment of the present invention;

[0060] Figure 20 This is a schematic diagram of the structure of the fixing member and the swing head tie rod according to an embodiment of the present invention;

[0061] Figure 21 This is a schematic diagram of the structure of the fastener and gear set in another embodiment of the present invention.

[0062] Figure label:

[0063] 1. Anastomosing device body 611 Waist-shaped hole

[0064] 11 Sleeve 62 Guide Section

[0065] 20 Third Channel 63 Film Pulling Part

[0066] 2. Second housing 7. Fixing component

[0067] 21 Receiving hole 71 First fixing part

[0068] 22 Second fixing hole 72 Third fixing part

[0069] 23 Limiting component 73 Fifth fixing part

[0070] 30 First Channel 74 Drive Wheel Support

[0071] 3 First housing 741 clearance groove

[0072] 31 Fourth fixing part 75 Driven wheel support part

[0073] 32 First fixing hole 751 Through hole

[0074] 33 Guide groove 76 Locking element (Example 1)

[0075] 34 Sixth fixing part 761 Locking part (Example 1)

[0076] 35 Casing limiting section 7611 Guide surface

[0077] 4. Drive wheel 762 connecting part (Example 1)

[0078] 41 Knob 77 First connecting arm

[0079] 42 Drive gear tooth section 78 Second connecting arm

[0080] 43 Second fixing part 79 Second channel

[0081] 5 Driven wheel 710 locking element (Example 2)

[0082] 51 Driven wheel rotation shaft 7101 Locking part (Example 2)

[0083] 511 First end of the rotating shaft 7102 Connecting part (Embodiment 2)

[0084] 512 The second end of the rotating shaft 8 Swing head pull plate

[0085] 52 Driven gear teeth 9 Pin head

[0086] 53 Eccentric wheel section 91 Anvil

[0087] 6. Swing head tie rod 93 connector

[0088] 61 Eccentric wheel mating part Detailed Implementation

[0089] Exemplary embodiments will now be described more fully with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in many forms and should not be construed as limited to the embodiments set forth herein; rather, they are provided so that the invention will be thorough and complete, and will fully convey the concept of the exemplary embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and therefore repeated descriptions of them will be omitted.

[0090] This invention provides a swing-head mechanism and a medical stapler including the swing-head mechanism. The medical stapler includes a staple head, a stapler body, and a swing-head mechanism disposed between the staple head and the stapler body. The swing-head mechanism includes a gear set, a swing-head pull rod, a swing-head pull plate, and a locking element. The gear set includes a driving gear and a driven gear, with the driving gear teeth meshing with the driven gear teeth. The swing-head pull plate is connected to the pull plate mating part of the swing-head pull rod. When the driven gear rotates, the swing-head pull plate is further driven to move along the axial direction of the stapler via the swing-head pull rod. The locking element includes a locking part. This invention can easily and conveniently realize the swing of the staple head relative to the stapler body. Furthermore, when not subjected to external force for rotation, the locking part meshes with the driving gear teeth and / or the driven gear teeth to prevent rotation, improve the positional stability of the staple head, and avoid uncontrollable swinging. When the driving wheel and / or driven wheel are driven to rotate by an external force, the locking part moves away from the teeth of the driving wheel and / or driven wheel without obstructing their rotation, and without affecting the function of the oscillating head mechanism.

[0091] In this invention, the driven wheel refers to a gear with a first mating part that engages with the sway head lever, and the driving wheel refers to a gear that meshes with the driven wheel, but it is not specifically required that the driving wheel drives the driven wheel to rotate. In different embodiments, the driven wheel may rotate to drive the driven wheel to rotate, or the driven wheel may rotate to drive the driving wheel to rotate.

[0092] The structure of the swing mechanism of various specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments are not intended to limit the scope of protection of the present invention.

[0093] This invention provides a head-swinging mechanism and a medical stapler including the head-swinging mechanism, such as... Figures 1-3 As shown, the medical stapler includes a staple head 9, a stapler body 1, and a swing mechanism disposed between the staple head 9 and the stapler body 1. The stapler body 1 includes a sleeve 11, the distal end of which is connected to the staple head 9. The staple head 9 includes an anvil 91 and a staple cartridge assembly (not shown) disposed opposite to each other, and a connector 93 located on the proximal side of the anvil 91 and the staple cartridge assembly. The swing mechanism includes a housing and two swing tabs 8 passing through the housing, the housing including a first housing 3 and a second housing 2. The swing tabs 8 are at least partially located inside the sleeve 11. The distal end of the swing tabs 8 is connected to the connector 93. The axial movement of the swing tabs 8 can control the staple head 9 to swing laterally in the R1 or R2 direction relative to the axis S0 of the stapler. The two swing tabs 8 move in opposite directions during axial movement.

[0094] In this invention, the distal and proximal sides are relative to the operator. The end closer to the operator is the proximal side, and the end farther from the operator, i.e., closer to the surgical position, is the distal side. The direction along the axis of the stapler is the axial direction, i.e., 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. For example, in Figure 1 From this perspective, the distal side of the staple head 9 is the left side, and the proximal side is the right side. The S1 direction is the direction from the distal side to the proximal side of the stapler. The S1 direction, or the direction opposite to the S1 direction, is defined as the axial direction of the stapler. Figure 1 In the S2 direction, the anastomosis device is transverse, i.e., in the width direction. (Definition) Figure 6 In this invention, direction S3 refers to the longitudinal direction of the stapler, i.e., the height direction. For a single component, "inner" and "outer" are relative to the axis of the stapler; the side closer to the axis is the inner side, and the side farther from the axis is the outer side. For ease of description, "upper" and "lower" are used from the perspective shown in the figures below, but these descriptions should not be construed as limiting the invention. In different embodiments, the relative positions of "upper" and "lower" can be interchanged.

[0095] In this embodiment, the housing includes a first inner surface and a second inner surface. For example... Figure 2 and Figure 3 As shown, the housing is divided into a first housing 3 located below and a second housing 2 located above, and the first housing 3 and the second housing 2 together define a third channel 20 for passage through the sleeve 11. Figure 3 and Figure 4 The third channel 20 marked in the diagram is a part of the third channel. After the first housing 2 and the second housing 3 are combined, the two parts 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.

[0096] like Figure 3 and Figure 4As shown, the oscillating mechanism further includes a gear set and an oscillating rod 6, housed within a cavity formed by the first housing 3 and the second housing 2. The gear set includes a driving wheel 4 and a driven wheel 5. The driving wheel 4 includes an operating part and a driving wheel tooth 42. In this embodiment, the operating part is a knob 41 that is at least partially exposed outside the second housing 2. In another embodiment, the driven wheel 5 may include an operating part, allowing the driving wheel 4 to rotate manually. The driven wheel 5 includes a driven wheel tooth 52, a first mating part, and a driven wheel rotation shaft 51, which passes through the driven wheel tooth 52 and the first mating part. The driven wheel tooth 52 meshes with the driving wheel tooth 42, so that the rotation of the driving wheel 4 can drive the driven wheel 5 to rotate. The swing head lever 6 includes a second mating part and a pull tab mating part 63. The pull tab mating part 63 is connected to the proximal end of the swing head pull tab 8. The second mating part engages with the first mating part so that when the driven wheel 5 rotates, it drives the pull tab mating part 63 of the swing head lever 6 to move along the axial direction of the stapler, thereby driving the swing head pull tab 8 to move along the axial direction. This invention, through the gear engagement between the driving wheel 4 and the driven wheel 5, allows for flexible adjustment of the swing direction and swing angle of the staple head 9 by controlling the rotation angle of the driving wheel 4.

[0097] like Figure 3 and Figure 4 As shown, in this embodiment, corresponding to the two swing head pull plates 8, two swing head pull rods 6 are provided, and the two swing head pull rods 6 are symmetrically arranged with respect to the axial direction of the anastomosis device. When the driving wheel 4 rotates, the two swing head pull rods 6 move in opposite directions. Correspondingly, two driven wheels 5 are provided, and the two driven wheels 5 are located near the proximal end of the driving wheel 4. The two driven wheels 5 are symmetrically arranged with respect to the axis of the anastomosis device, and 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 formed by the first housing 3 and the second housing 2 is adapted to the shape of the gear set.

[0098] like Figure 5 and Figure 6As shown, the drive gear tooth section 42 includes multiple drive gear teeth. The oscillating head mechanism also includes at least one locking member 76, which includes a locking part 761. In the initial state, the locking part 761 engages with the drive gear tooth section 42 to block the rotation of the drive gear 4, improving the positional stability of the nail head 9 and preventing uncontrollable oscillation. When the knob 41 of the drive gear 4 is operated to drive the drive gear 4 to rotate, the locking part 761 moves away from the drive gear tooth section 42 under the force of the drive gear tooth section 42 without blocking the rotation of the drive gear 4. Thus, the oscillating head mechanism can still control the oscillation of the nail head 9, and the normal realization of the oscillation control function of the oscillating head mechanism will not be affected.

[0099] In this embodiment, the locking member 76 is at least partially elastic. Initially, the locking portion 761 is at least partially embedded between two adjacent drive gear teeth, and the locking member 76 undergoes no elastic deformation or only a small amount of elastic deformation. If the stapler shakes, causing the drive gear 4 to have an unintentional rotational tendency, the locking member 76 remains embedded between the two adjacent drive gear teeth because the force exerted by the drive gear teeth on the locking portion 761 is less than the force required to cause elastic deformation of the locking member 76, thus blocking the rotation of the drive gear tooth portion 42. When the operator rotates knob 41, the force applied to the drive wheel 4 by the operator through knob 41 causes the drive wheel 4 to tend to rotate. At this time, the force exerted by the drive wheel teeth on the locking part 761 is greater than the force that causes the locking part 76 to elastically deform. The locking part 761 elastically deforms under the force of the drive wheel teeth 42 and moves away from the drive wheel teeth 42, thus not obstructing the rotation of the drive wheel 4. At this time, the swing mechanism can control the swing of the nail head 9. When the external force applied to knob 41 by the operator is removed, the drive wheel 4 stops rotating. Under the action of elastic restoring force, the locking part 761 moves towards the drive wheel teeth 42 and re-enters between two adjacent drive wheel teeth, engaging with the drive wheel teeth 42 again, thereby keeping the drive wheel 4 in its current position without any unintentional shaking, and thus effectively keeping the nail head 9 at the current swing angle.

[0100] like Figures 4-7As shown, in this embodiment, the swing head mechanism further includes a fixing member 7. The fixing member 7 is located between the gear set and the inner surface of the first housing 3. The gear set is fixed to the inner surface of the first housing 3 by the fixing member 7, and the driving wheel 4 and the driven wheel 5 can rotate relative to the fixing member 7. This helps maintain the structural stability of the swing head mechanism and avoids instability of the nail head 9 due to the instability of the gear set during use, thus improving the surgical effect. Specifically, the fixing member 7 includes a driving wheel support 74 and two driven wheel support 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 head pull rod 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 part 762, and the locking part 761 is connected to the fixing member 7 through the connecting part 762. The fixing member 7 is fixed to the first housing 3. Therefore, the locking member 76 can be fixed to the first housing 3 by the fixing member 7. The method of fixing the fixing member 7 to the gear set and the first housing 3 will be described in detail below.

[0101] like Figure 8 As shown, the first mating part is an eccentric wheel part 53, and the second mating part is an eccentric wheel mating part 61, which mates with the eccentric wheel part 53 so that when the driven wheel 5 rotates, the rotational motion of the driven wheel 5 is converted into the axial motion of the swing head rod 6. In this embodiment, the outer contour of the eccentric wheel part 53 is circular or arc-shaped. In other embodiments, the outer contour of the eccentric wheel part 53 can also be other shapes, such as triangles or other polygons. The driven wheel rotation axis 51 passes through the center of the driven wheel tooth part 52. However, the eccentric wheel part 53 is eccentrically positioned relative to the driven wheel rotation axis 51, that is, the center of the driven wheel rotation axis 51 and the central axis O1 of the eccentric wheel part 53 are separated by a first distance d1. The eccentric wheel mating part 61 of the swing head rod 6 has a third mating hole, and the eccentric wheel part 53 at least partially enters the third mating hole. In another alternative embodiment, a mating groove may also be provided in the eccentric wheel mating part 61 of the swing head lever 6, and the eccentric wheel part 53 may at least partially enter the mating groove.

[0102] like Figure 2 and Figure 8As shown, the inner surface of the first housing 3 is provided with a guide groove 33, which extends along the axial direction of the stapler. The swing head lever 6 also includes a guide portion 62, which is located in the guide groove 33 and is limited by the guide groove 33 to only have axial movement. When the drive wheel 4 rotates, it ensures that the swing head lever 6 only has axial movement and will not have lateral sway. Specifically, in this embodiment, the swing head lever 6 includes two guide portions 62, which are located on the distal and proximal sides of the eccentric wheel mating part 61, respectively. The guide portion 62 is a strip extending along the axial direction of the stapler.

[0103] like Figure 4 and Figure 8 As shown, the pull tab mating part 63 is a protrusion located inside the eccentric wheel mating part 61. The proximal end of the swing head pull tab 8 has a hole that mates with the protrusion, and the protrusion is embedded in the hole on the proximal end side of the swing head pull tab 8. Preferably, each side of the protrusion is a right angle to ensure the stability of the mating between the protrusion and the swing head pull tab 8 and to prevent accidental slippage. Preferably, the protrusion is located at the axial center of the swing head pull rod 6, that is, the distance from the center of the protrusion to the distal end of the swing head pull rod 6 is equal to the distance from the center of the protrusion to the proximal end of the swing head pull rod 6. This further prevents the swing head pull rod 6 from lateral swaying due to external forces when it pulls the swing head pull tab 8 axially. In another alternative embodiment, the pull tab mating part 63 can also be a groove provided on the inner side of the eccentric wheel mating part 61, and the proximal end of the swing head pull tab 8 is provided with a protrusion that mates with the groove. The protrusion is embedded in the groove, and the groove is preferably located at the center position of the swing head pull rod 6 along the axial direction. In this embodiment, the inner surface of the eccentric wheel mating part 61 is a plane parallel to the axial direction of the stapler, which can better accommodate the sheet-like structure of the swing head pull tab 8.

[0104] The following is combined with Figures 8-10 The working principle of the oscillating mechanism in this embodiment is explained in detail.

[0105] like Figure 8As shown, in the transverse direction of the stapler, the two guide portions 62 are respectively connected to the middle of the distal and proximal ends of the eccentric wheel mating portion 61, so that the limiting effect of the guide groove 33 on the guide portion 62 can be applied more evenly to all positions of the swing head pull rod 6, further preventing the swing head pull rod 6 from laterally swaying due to the rotational movement of the eccentric wheel portion 53 during movement. The third mating hole of the eccentric wheel mating portion 61 is an oblong hole 611 including two arc-shaped sides and two straight sides. The radius of the arc-shaped sides is equal to the radius of the eccentric wheel portion 53, and the two straight sides of the oblong hole 611 extend laterally along the stapler. In another alternative embodiment, the shape of the oblong hole 611 may also be different. Figure 9 The waist-shaped shape shown can be achieved by driving the eccentric wheel mating part 61 to move axially under the drive of the eccentric wheel part 53 when the eccentric wheel part 53 rotates. Figure 8 The diagram shows the initial configuration of the driving wheel 4, the driven wheel 5, and the oscillating head lever 6. In the initial state, the central axes O1 of the eccentric wheel portions 53 of both driven wheels 5 are located outside the corresponding driven wheel rotation axis 51. Therefore, when the driving wheel 4 drives the driven wheels 5 to rotate, the two driven wheels 5 can drive the two oscillating head levers 6 to move in opposite directions. In an alternative embodiment, in the initial state, the central axes of the eccentric wheel portions 53 of both driven wheels 5 can also be located inside the corresponding driven wheel rotation axis 51.

[0106] like Figure 9 As shown, in the initial state, when the driving wheel 4 rotates 15° along the R3 direction, the driving wheel 4 drives the driven wheel 5 to rotate a certain angle along the R4 direction (this angle depends on the gear ratio of the driving wheel 4 and the driven wheel 5). Figure 9 The upper swivel lever 6 shown in the image is compared to Figure 8 The middle moves along the W1 direction, that is, it moves towards the distal side. The lower sway lever 6 is compared to... Figure 8 The middle moves along the W2 direction, that is, towards the proximal side, so that the nail head 9 can move along... Figure 1 The swing is shown in the R1 direction.

[0107] like Figure 10 As shown, in the initial state, when the driving wheel 4 rotates 30° along the R5 direction, the driving wheel 4 drives the driven wheel 5 to rotate a certain angle along the R6 direction (this angle depends on the gear ratio of the driving wheel 4 and the driven wheel 5). Figure 10 The upper swivel lever 6 shown in the image is compared to Figure 8 The middle moves along the W3 direction, that is, towards the proximal side, and the lower swivel lever 6 is compared to... Figure 8The middle moves along the W4 direction, that is, towards the distal end, so that the nail head 9 can move along... Figure 1 The R2 direction is shown as a swing. Compare. Figure 9 and Figure 10 It can be seen that different rotation directions of the drive wheel 4 can achieve different rotation directions of the nail head 9. Furthermore, different rotation angles of the drive wheel 4 result in different displacements of the sway head lever 6, causing different swing angles of the nail head 9. The larger the rotation angle of the drive wheel 4, the greater the displacement of the sway head lever 6, and the greater the swing angle of the nail head 9. This allows for flexible control of the swing direction and angle of the nail head 9.

[0108] The following is combined with Figures 11-14 The structure of the locking member 76 and the fixing member 7 of the present invention will be described in detail.

[0109] like Figure 11 and Figure 12 As shown, the locking member 76 is rod-shaped and parallel to the central axis of the driving wheel 4. The fixing member 7 includes two driven wheel support portions 75. An axially extending second channel 79 is formed between the two driven wheel support portions 75, thereby providing a second channel 79 for the proximal end of the sleeve 11 to pass through. The fixing member 7 is provided with two locking members 76, which are symmetrically arranged with respect to the axis of the stapler, and are respectively disposed between the two driven wheel support portions 75 and the driving wheel support portion 74. The connecting portion 762 of each locking member 76 is connected to the driving wheel support portion 74 through a first connecting arm 77 and to a driven wheel support portion 75 through a second connecting arm 78. By fixing the locking member 76 between the driving wheel support portion 74 and the driven wheel support portion 75 through the first connecting arm 77 and the second connecting arm 78, the structural stability of the locking member 76 and 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 drive wheel support portion 74 and the driven wheel support portion 75. In another embodiment, the first connecting arm 77 and the second connecting arm 78 may also be welded to the drive wheel support portion 74 and the driven wheel support portion 75. In yet another alternative embodiment, the first connecting arm 77 and the second connecting arm 78 may also be integrally formed with the drive wheel support portion 74 and the driven wheel support portion 75, and integrally formed with the connecting portion 762 of the locking member 76.

[0110] like Figure 13 and Figure 14As shown, in this embodiment, the first connecting arm 77 is perpendicular to the second connecting arm 78. Therefore, when the locking member 76 undergoes elastic deformation due to the drive of the teeth of the drive wheel 4, the 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 or lateral movement occurs.

[0111] like Figure 14 As shown, in this embodiment, the locking part 761 includes two inclined guide surfaces 7611. When the locking part 761 engages with the teeth of the driving wheel 4, the guide surfaces 7611 of the locking part 761 at least partially enter between the teeth of two adjacent driving wheels 4, and the two guide surfaces 7611 are respectively opposite to the side surfaces of the two adjacent teeth of the driving wheels 4. When the operator operates the knob to rotate the driving wheel 4, the teeth of the driving wheel 4 apply a force to the guide surfaces 7611. This force is decomposed by the guide surfaces 7611 into a force that drives the locking part 761 away from the driving wheel 4, and the guide surfaces 7611 can better guide the disengagement of the locking part 761 from the teeth of the driving wheel 42.

[0112] In another alternative embodiment, the locking part 761 can be configured as a single, integral arc surface on the side facing the driving gear tooth 42. When the locking part 761 engages with the driving gear tooth 42, the arc surface of the driving gear tooth 42 at least partially enters between the teeth of two adjacent driving gears 4. When the operator operates the knob to rotate the driving gear 4, the teeth of the driving gear 4 apply a force to the guide surface 7611. This force is decomposed by the arc surface into a force that drives the locking part 761 away from the driving gear 4, and the arc surface can better guide the disengagement of the locking part 761 from the driving gear tooth 42.

[0113] The following is combined with Figures 15-18 The structural relationship between the fastener 7 and other components of this invention will be explained in detail. For example... Figure 15 and Figure 16As shown, the inner surfaces of the first housing 3 and the second housing 2 are respectively provided with a first fixing hole 32 and a second fixing hole 22. The first end 511 and the 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 can rotate around the driven wheel rotation shaft 51. The driven wheel tooth 52 and the eccentric wheel 53 described here can rotate around the driven wheel rotation shaft 51. Alternatively, the driven wheel rotation shaft 51 can be fixed non-rotatably to the second fixing hole 22 and the first fixing hole 32, and the driven wheel tooth 52 and the eccentric wheel 53 can rotate relative to the driven wheel rotation shaft 51. Or, the driven wheel rotation shaft 51 can be rotatably embedded in the second fixing hole 22 and the first fixing hole 32, and the driving wheel tooth 42 and the eccentric wheel 53 can be non-rotatably sleeved on the driven wheel rotation shaft 51. The driving wheel tooth 42 and the eccentric wheel 53 can rotate together with the driven wheel rotation shaft 51 around the axis of the driven wheel rotation shaft 51.

[0114] like Figure 15 As shown, the surface of the second housing 2 is provided with a receiving hole 21, and the knob 41 passes through the receiving hole 21 and protrudes from the outside of the second housing 2. The fixing member 7 at least partially enters the receiving cavity of the second housing 2. At least one limiting member 23 is provided on the inner surface of the second housing 2. The limiting member 23 is distributed on the outer side of the driven wheel support portion 75, and the limiting member 23 restricts the axial movement of the driven wheel support portion 75.

[0115] like Figure 16 and Figure 17 As shown, the drive wheel support 74 has a clearance groove 741 on the side facing the inner surface of the first housing 3. A sleeve limiting part 35 is provided on the inner surface of the first housing 3 at a position corresponding to the clearance groove 741. The clearance groove 741 and the sleeve limiting part 35 form an axially extending first channel 30, through which the sleeve 11, fitted onto the outside of the swing head pull plate 8, passes. The surface of the clearance groove 741 is preferably an arc surface, and the surface of the sleeve limiting part 35 is also preferably an arc surface. Therefore, the first channel 30 is a cylindrical channel, which better fits with the outer surface of the cylindrical sleeve 11 and provides good support for the sleeve 11.

[0116] like Figures 15-17As shown, the drive wheel support 74 has a third fixing part 72 on the side facing the inner surface of the first housing 3, and a fourth fixing part 31 is provided on the inner surface of the first housing 3. The third fixing part 72 and the fourth fixing part 31 are embedded together. In this embodiment, the third fixing part 72 is a second fixing post protruding towards the inner surface of the first housing 3, and the fourth fixing part 31 is a first support seat provided on the inner surface of the first housing 3. The first support seat has a first mating hole at its center, and the second fixing post at least partially enters the first mating hole. The third fixing part 72 and the fourth fixing part 31 form a non-rotatable connection. For example, the third fixing part 72 and the fourth fixing part 31 can be an interference fit. Furthermore, since the drive wheel support 74 has two laterally arranged third fixing parts 72 and the first housing 3 has two laterally arranged fourth fixing parts 31, rotation of the third fixing parts 72 and the fourth fixing parts 31 can be further prevented. In another alternative embodiment, the third fixing part 72 may include a first mating hole, the fourth fixing part 31 may be a fixing post protruding toward the drive wheel support part 74, or a fixing hole corresponding to the second fixing post may be directly provided on the inner surface of the first housing 3.

[0117] like Figures 15-17 As shown, a fifth fixing part 73 is provided on the side of the driven wheel support 75 facing the inner surface of the first housing 3, and a sixth fixing part 34 is provided on the inner surface of the first housing 3. The fifth fixing part 73 and the sixth fixing part 34 are embeddedly connected. In this embodiment, the fifth fixing part 73 is a third fixing post protruding towards the inner surface of the first housing 3, and the sixth fixing part 34 is a second support seat provided on the inner surface of the first housing 3. The second support seat has a second mating hole at its center, and the third fixing post at least partially enters the second mating hole. The fifth fixing part 73 and the sixth fixing part 34 form a non-rotatable connection. For example, the third fixing part 72 and the fourth fixing part 31 can be an interference fit. In addition, since the fixing member 7 is provided with two horizontally arranged fifth fixing parts 73 and the first housing 3 is provided with two horizontally arranged sixth fixing parts 34, rotation of the fifth fixing part 73 and the sixth fixing part 34 can be further prevented. In another alternative embodiment, the fifth fixing part 73 may include a second mating hole, the sixth fixing part 34 may be a fixing post protruding toward the driven wheel support part 75, or a fixing hole corresponding to the third fixing post may be directly provided on the inner surface of the first housing 3.

[0118] like Figure 17As shown, the drive wheel support 74 has a first fixing part 71 on the side facing the drive wheel 4, as... Figure 18 As shown, a second fixing part 43 is provided on the side of the drive wheel 4 facing the fixing member 7, and the first fixing part 71 and the second fixing part 43 are embeddedly connected. In this embodiment, the first fixing part 71 is a first fixing post protruding from the drive wheel support part 74 toward the drive wheel 4, and the second fixing part 43 is a cylindrical groove formed on the side facing the fixing member 7. The groove is coaxially arranged with the drive wheel 4, and the first fixing post at least partially enters the groove, allowing the drive wheel 4 to rotate relative to the first fixing part 71. In another alternative embodiment, the first fixing part can be a groove on the side of the drive wheel support part 74 facing the drive wheel 4, and the second fixing part can be a first fixing post protruding from the drive wheel 4 toward the fixing member. The first fixing post is coaxially arranged with the drive wheel 4, and the first fixing post at least partially enters the groove.

[0119] like Figures 18-20 As shown, the driven wheel support 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 engages with the eccentric wheel mating portion 61 of the swing head pull rod 6. Figure 20 As shown, the axial length of the through hole 751 of the driven wheel support 75 is greater than the radius of the eccentric wheel 53 and also greater than the axial length of the oblong hole 611 of the eccentric wheel mating part 61. When the eccentric wheel 53 rotates, the through hole 751 provides sufficient clearance for the eccentric rotation of the eccentric wheel 53 and the axial movement of the eccentric wheel mating part 61. The guide part 62 abuts against the distal and proximal sidewalls of the through hole 751 of the driven wheel support 75 in the longitudinal direction to maintain a relatively stable positional relationship between the fixing member 7 and the swing head rod 6.

[0120] The above embodiment is illustrated using the example of the locking member engaging with the driving gear in the gear set. In such cases... Figure 21 In another embodiment shown, a locking member 710 is provided, which cooperates with the driven gear 5 in the gear set. The locking member 710 includes a locking part 7101 and a connecting part 7102, and the connecting part 7102 is connected to the driving gear support part 74 and / or the driven gear support part 75. Figure 21As shown, when the driving wheel 4 and / or the driven wheel 5 are not subjected to external force, the locking part 7101 of the locking member 710 engages with the driven wheel tooth 52 to prevent the driven wheel 5 from rotating. When the driving wheel and / or the driven wheel is driven to rotate by an external force, the locking part 7101 moves away from the driven wheel tooth 52 under the action of the driven wheel tooth 52, without preventing the driven wheel 52 from rotating. The number of locking members 710 can be one, two, or more; they can engage with only one driven wheel 5 or with two driven wheels 5 respectively.

[0121] In this embodiment, the locking member 710 is at least partially elastic. When the driving wheel 4 and / or the driven wheel 5 are driven to rotate by an external force, the locking part 7101 undergoes elastic deformation under the action of the driven wheel tooth 52 and moves away from the driven wheel tooth 52. When the driven wheel 5 stops rotating, the locking part 52 re-engages with the driven wheel tooth 52 under the action of elastic restoring force.

[0122] In this embodiment, the driven gear tooth portion 52 includes a plurality of driven gear teeth, and the locking portion 7101 includes two inclined guide surfaces or an arc surface. When the locking portion 7101 engages with the driven gear tooth portion 52, the guide surface or arc surface of the locking portion 7101 at least partially enters 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, or the arc surface is opposite to the side surface of the driven gear teeth.

[0123] The structure of other components in this embodiment is similar to Figures 1-20 The implementation methods are the same, and will not be repeated here.

[0124] In another alternative implementation, it is also possible to simultaneously set Figures 1-20 Locking component 76 and Figure 21 The locking element 7101, which cooperates with both the driving wheel 4 and the driven wheel 5, is also within the scope of protection of this invention.

[0125] In the above embodiments, the connecting portion of the locking member is connected to the fixing member. In other alternative embodiments, the fixing member of the locking member may also be connected to other locations, for example, directly connected to the inner surface of the housing, or connected to another component fixed to the housing.

[0126] The above description, in conjunction with specific preferred embodiments, provides a further detailed explanation of the present invention. It should not be construed that the specific implementation of the present invention is limited to these descriptions. For those skilled in the art, various simple deductions or substitutions can be made without departing from the concept of the present invention, and all such modifications and substitutions should be considered within the scope of protection of the present invention.

Claims

1. A head-swinging mechanism, characterized in that, For use in medical staplers, the swing mechanism includes: A gear set includes a driving gear and a driven gear. The driving gear includes a driving gear tooth portion and an operating portion. The operating portion is used for manual operation. The driven gear includes a driven gear tooth portion and a first mating portion. The driven gear tooth portion meshes with the driving gear tooth portion. The central axes of the driving gear and the driven gear are both parallel to the height direction. The device includes a swing head pull rod and a swing head pull plate. The swing head pull rod includes a second mating part and a pull plate mating part. The second mating part mates with the first mating part. The swing head pull plate is connected to the pull plate mating part of the swing head pull rod so that when the driven wheel rotates, it drives the swing head pull rod to move along the axial direction of the anastomosis device. The swing head pull rod drives the swing head pull plate to move along the axial direction through the pull plate mating part. A fixing member and a housing, the housing including a receiving cavity for accommodating the gear set, the fixing member, and the sway head pull rod; the housing including a first inner surface and a second inner surface surrounding the receiving cavity, the fixing member being fixed to the housing, the fixing member including a third surface facing the first inner surface and a fourth surface facing the second inner surface, the third surface and the fourth surface being disposed opposite each other in the height direction, the gear set being at least partially disposed between the second inner surface of the housing and the fourth surface of the fixing member, and the sway head pull rod being located between the third surface of the fixing member and the first inner surface of the housing; and A locking member includes a locking portion and a connecting portion, wherein at least a portion of the locking member is connected to the fixing member via the connecting portion; When the driving wheel and / or the driven wheel are not subjected to external force, the locking part engages with the teeth of the driving wheel and / or the teeth of the driven wheel to prevent the rotation of the driving wheel and / or the driven wheel. When the driving wheel and / or the driven wheel are driven to rotate by external force, the locking part moves away from the teeth of the driving wheel and / or the driven wheel under the action of the teeth of the driving wheel and / or the driven wheel, without preventing the rotation of the driving wheel and / or the driven wheel.

2. The swing head mechanism according to claim 1, characterized in that, The locking member is at least partially elastic. When the driving wheel and / or the driven wheel is driven to rotate by an external force, the locking part undergoes elastic deformation under the action of the driving wheel teeth and / or the driven wheel teeth and moves away from the driving wheel teeth and / or the driven wheel teeth. When the driving wheel and / or the driven wheel stops rotating, the locking part re-engages with the driving wheel teeth and / or the driven wheel teeth under the action of elastic restoring force.

3. The swing head mechanism according to claim 1, characterized in that, The driving gear tooth portion includes multiple driving gear teeth, and the locking portion includes two inclined guide surfaces. When the locking portion meshes with the driving gear tooth portion, the guide surface of the locking portion at least partially enters between two adjacent driving gear teeth, and the two guide surfaces are respectively opposite to the side surfaces of two adjacent driving gear teeth. Alternatively, the driven gear tooth portion includes a plurality of driven gear teeth, and the locking portion includes two inclined guide surfaces. When the locking portion engages 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 sides of two adjacent driven gear teeth.

4. The swing head mechanism according to claim 1, characterized in that, The active gear tooth portion includes multiple active gear teeth, and the locking portion has an arc surface on the side facing the active gear tooth portion. When the locking portion meshes with the active gear tooth portion, the arc surface of the locking portion at least partially enters between two adjacent active gear teeth. Alternatively, the driven gear teeth may include a plurality of driven gear teeth, and the locking part facing the driven gear teeth may be an arc surface. When the locking part engages with the driven gear teeth, the arc surface of the locking part may at least partially enter between two adjacent driven gear teeth.

5. The swing head mechanism according to claim 1, characterized in that, The locking element is rod-shaped and parallel to the central axis of the driving wheel and / or the driven wheel.

6. The swing head mechanism according to claim 1, characterized in that, The fixing member includes a drive wheel support and a driven wheel support. The drive wheel support is located between the drive wheel and the first inner surface of the housing. The driven wheel support is located between the driven wheel and the first inner surface of the housing. The connecting part of the locking member is connected to the drive wheel support, and / or the connecting part of the locking member is connected to the driven wheel support.

7. The swing head mechanism according to claim 6, characterized in that, The gear set includes two driven wheels, the oscillating head mechanism includes two oscillating head rods and two oscillating head pull plates. When the driving wheel rotates, it drives the two oscillating head rods to move axially through the driven wheels, and the two oscillating head rods move in opposite directions. The fixing member includes two driven wheel support parts.

8. The swing head mechanism according to claim 6, characterized in that, It includes two locking members, which are respectively disposed between the two driven wheel support portions and the driving wheel support portion. The connecting portion of each locking member is connected to the driving wheel support portion through a first connecting arm and to a driven wheel support portion through a second connecting arm.

9. The swing head mechanism according to claim 8, characterized in that, The first connecting arm is perpendicular to the second connecting arm.

10. The swing head mechanism according to claim 6, characterized in that, The first mating part is an eccentric wheel part, the second mating part is an eccentric wheel mating part, the swing head pull rod is located between the third surface of the fixing member and the first inner surface of the housing, the driven wheel support part of the fixing member is provided with a through hole, and the eccentric wheel part of the driven wheel passes through the through hole and mates with the eccentric wheel mating part of the swing head pull rod; In the initial state, the central axes of the eccentric wheel portions of both driven wheels are located outside the corresponding driven wheel rotation axis, or in the initial state, the central axes of the eccentric wheel portions of both driven wheels are located inside the corresponding driven wheel rotation axis.

11. The swing head mechanism according to claim 10, characterized in that, The eccentric wheel mating part is provided with a mating groove or a third mating hole, and the eccentric wheel part at least partially enters the mating groove or the third mating hole. The eccentric wheel and the mating groove or the third mating hole are mated to drive the swing head rod to move axially. The axial length of the through hole of the driven wheel support is greater than the radius of the eccentric wheel and greater than the axial length of the mating groove or the third mating hole of the eccentric wheel mating part.

12. The swing head mechanism according to claim 6, characterized in that, The drive wheel support portion has a clearance groove on the side facing the first inner surface of the housing, and a sleeve limiting portion is provided on the housing opposite to the clearance groove. The clearance groove and the sleeve limiting portion form a first channel along the axial direction; and / or, A second channel along the axial direction is formed between the two driven wheel supports.

13. The swing head mechanism according to claim 6, characterized in that, The drive wheel support is provided with a first fixing part on the side facing the drive wheel, and the drive wheel is provided with a second fixing part on the side facing the fixing member. The first fixing part and the second fixing part are embedded and connected, and the drive wheel can rotate relative to the first fixing part.

14. The swing head mechanism according to claim 13, characterized in that, The first fixing part is a first fixing post protruding from the drive wheel support part toward the drive wheel; the second fixing part is a groove formed on the side of the drive wheel toward the fixing member, the groove being coaxially arranged with the drive wheel, and the first fixing post at least partially entering the groove; or, The first fixing part is a groove provided on the side of the drive wheel support part facing the drive wheel, and the second fixing part is a first fixing post provided on the drive wheel protruding towards the fixing member. The first fixing post is coaxially arranged with the drive wheel, and the first fixing post at least partially enters the groove.

15. The swing head mechanism according to claim 6, characterized in that, The drive wheel support portion is provided with a third fixing portion on the side facing the first inner surface of the housing, and the first inner surface of the housing is provided with a fourth fixing portion, the third fixing portion and the fourth fixing portion forming an embedded connection; and / or, A fifth fixing part is provided on the side of the driven wheel support facing the first inner surface of the housing, and a sixth fixing part is provided on the first inner surface of the housing. The fifth fixing part and the sixth fixing part are embedded together.

16. The swing head mechanism according to claim 15, characterized in that, The third fixing part is a second fixing post protruding toward the first inner surface of the housing, and the fourth fixing part is a first support seat disposed on the first inner surface of the housing. The first support seat has a first mating hole at its center, and the second fixing post at least partially enters the first mating hole. Alternatively, the third fixing part includes the first mating hole, and the fourth fixing part is a second fixing post disposed on the housing toward the drive wheel support part, and the second fixing post at least partially enters the first mating hole. The fifth fixing part is a third fixing post protruding toward the first inner surface of the housing, and the sixth fixing part is a second support seat disposed on the first inner surface of the housing. The second support seat has a second mating hole at its center, and the third fixing post at least partially enters the second mating hole. Alternatively, the fifth fixing part includes the second mating hole, and the sixth fixing part is a third fixing post disposed on the housing toward the driven wheel support part, and the third fixing post at least partially enters the second mating hole.

17. A medical stapler, characterized in that, Includes the swing mechanism as described in any one of claims 1 to 16.

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