Swing mechanism and medical anastomat

Abstract

This invention provides a swing head mechanism and a medical stapler. The swing head mechanism includes: a driving wheel, including a driving wheel toothed portion; a driven wheel, including a driven wheel toothed portion and a first mating portion, the driven wheel toothed portion meshing with the driving wheel toothed portion; a swing head pull rod, including a second mating portion and a pull tab mating portion, the second mating portion engaging with the first mating portion such that when the driven wheel rotates, it drives the pull tab mating portion of the swing head pull rod to move along the axial direction of the stapler; the swing head pull rod extends along the axial direction of the stapler and is connected to the pull tab mating portion of the swing head pull rod. This invention can easily and conveniently realize the swinging of the staple head relative to the stapler body.

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, and the swing angle of the staple head can be adjusted by gear engagement.

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

[0008] The driving gear, including the driving gear teeth;

[0009] The driven wheel includes a driven wheel tooth portion and a first mating portion, wherein the driven wheel tooth portion meshes with the driving wheel tooth portion;

[0010] The swing head pull rod includes a second mating part and a pull tab mating part. The second mating part is mated with the first mating part so that when the driven wheel rotates, it drives the pull tab mating part of the swing head pull rod to move along the axial direction of the anastomosis device.

[0011] The swing head pull tab extends along the axial direction of the anastomosis device and is connected to the pull tab mating part of the swing head pull rod.

[0012] In some embodiments, a housing is also included, the housing comprising a receiving cavity for accommodating the driving wheel and the driven wheel.

[0013] In some embodiments, the first inner surface of the housing is provided with a support portion protruding from the first inner surface, and the drive wheel is provided with a groove on the side facing the first inner surface of the housing; or, the first inner surface of the housing is provided with a groove, and the drive wheel is provided with a support portion on the side facing the first inner surface of the housing.

[0014] The support portion is located in the slide groove, and the support portion is rotatable relative to the slide groove.

[0015] In some embodiments, the support portion is an annular support portion or an arc-shaped support portion, the slide groove is an annular slide groove or an arc-shaped slide groove, and the slide groove is coaxially arranged with the drive wheel tooth portion.

[0016] In some embodiments, the driven wheel further includes a third mating portion, and the inner surface of the housing is provided with a fourth mating portion. The third mating portion and the fourth mating portion engage to allow the driven wheel to rotate relative to the housing.

[0017] In some embodiments, the third mating part includes a driven wheel rotation shaft, and the fourth mating part includes a fixing hole; or, the third mating part includes a fixing hole, and the fourth mating part includes a driven wheel rotation shaft;

[0018] The driven wheel's rotation shaft is at least partially located in the fixed hole, and the driven wheel's rotation shaft is rotatable relative to the fixed hole.

[0019] In some embodiments, the first mating portion is located on the side of the driven gear teeth facing the first inner surface of the housing.

[0020] In some embodiments, the first mating part is an eccentric wheel part, the center of the driven wheel rotation shaft is at a first distance from the central axis of the eccentric wheel part, the second mating part is an eccentric wheel mating part, the eccentric wheel mating part is provided with a mating groove or a mating hole, the eccentric wheel part at least partially enters the mating groove or a mating hole, and the eccentric wheel part mates with the mating groove or a mating hole to drive the swing head rod to move axially.

[0021] In some embodiments, the outer contour of the eccentric wheel portion is circular or arc-shaped, and the mating groove or the mating hole of the eccentric wheel mating portion is an oblong groove or oblong hole.

[0022] In some embodiments, the mating groove or the mating hole of the eccentric wheel mating part is an oblong shape including two arc-shaped sides and two straight sides, and the radius of the arc-shaped sides is equal to the radius of the eccentric wheel part.

[0023] In some embodiments, the two straight edges of the mating groove or the mating hole extend laterally along the stapler.

[0024] In some embodiments, the device includes two driven wheels, two swing head rods, and two swing head pull plates. The two driven wheels are symmetrically arranged with respect to the axis of the stapler, and the two swing head rods are symmetrically arranged with respect to the axial direction of the stapler. Each swing head rod is connected to a swing head pull plate. When the drive wheel rotates, the two swing head rods move in opposite directions.

[0025] In some embodiments, in the initial state, the central axes of the eccentric wheel portions of the two driven wheels are both located outside the corresponding driven wheel rotation axis, or in the initial state, the central axes of the eccentric wheel portions of the two driven wheels are both located inside the corresponding driven wheel rotation axis.

[0026] In some embodiments, the oscillating pull tab mating portion is a protrusion disposed on the inner side of the second mating portion, and the proximal end of the oscillating pull tab is provided with a hole that mates with the protrusion; or, the oscillating pull tab mating portion is a groove disposed on the inner side of the second mating portion, and the proximal end of the oscillating pull tab is provided with a protrusion that mates with the groove.

[0027] In some embodiments, the protrusion or the groove is located at the center of the oscillating head lever along the axial direction.

[0028] In some embodiments, the inner surface of the second mating part is a plane parallel to the axial direction of the stapler.

[0029] In some embodiments, the driven wheel is located near the end of the driving wheel.

[0030] In some embodiments, the driven wheel rotation axes of the two driven wheels are parallel to the central axis of the driving wheel, and the distances from the driven wheel rotation axes of the two driven wheels to the central axis of the driving wheel are equal.

[0031] In some embodiments, a guide groove is provided on the first inner surface of the housing, the guide groove extending along the axial direction of the stapler, and the swing head lever further includes a guide portion located in the guide groove and limited by the guide groove to only have axial movement.

[0032] In some embodiments, the swing head lever includes two guide portions, which are located at the distal and proximal ends of the second mating portion, respectively. The guide portions are strip-shaped and extend along the axial direction of the stapler. In the transverse direction of the stapler, the two guide portions are connected to the middle of the distal and proximal ends of the second mating portion, respectively.

[0033] In some embodiments, the drive wheel further includes an operating part, and a receiving hole is provided on the second side surface of the housing, through which the operating part protrudes outside the housing.

[0034] This invention also provides a medical stapler, including the aforementioned swing head mechanism.

[0035] The head-swinging mechanism and medical stapler provided by this invention have the following advantages:

[0036] By employing this invention, the driven wheel is driven to rotate by the driving wheel, and the rotational motion is converted into axial motion by the cooperation between the driven wheel and the swing head pull rod. Then, the swing head pull rod drives the swing head pull plate to move axially, thereby making it simple and convenient to swing the staple head relative to the staple body. Furthermore, the swing direction and swing angle of the staple head can be flexibly adjusted by the gear cooperation between the driving wheel and the driven wheel. Attached Figure Description

[0037] Other features, objects, and advantages of the present invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings.

[0038] Figure 1 This is a schematic diagram of the structure of a stapler according to an embodiment of the present invention;

[0039] Figure 2 This is a schematic diagram of the structure of the nail head and the swing head pull plate in one embodiment of the present invention;

[0040] Figure 3 This is a schematic diagram of the structure of the swing head mechanism and the sleeve according to an embodiment of the present invention;

[0041] Figure 4 This is a schematic diagram of the structure of a swing head mechanism according to an embodiment of the present invention;

[0042] Figure 5 This is a top view of a swing head mechanism according to an embodiment of the present invention;

[0043] Figure 6 yes Figure 5 A sectional view along the A1-A1 direction;

[0044] Figure 7 This is a schematic diagram of the structure of the second housing according to an embodiment of the present invention;

[0045] Figure 8 and Figure 9 This is an exploded view of the swing head mechanism after removing the second housing according to an embodiment of the present invention;

[0046] Figure 10 This is a schematic diagram of the structure of the first housing according to an embodiment of the present invention;

[0047] Figure 11 This is a schematic diagram of the structure of the oscillating head pull rod and the oscillating head pull plate according to an embodiment of the present invention;

[0048] Figure 12 This is an exploded view of the oscillating head pull rod and driven wheel in accordance with an embodiment of the present invention;

[0049] Figure 13 and Figure 14 This is a schematic diagram of the swing mechanism controlling the head of the nail to swing along the R1 direction according to an embodiment of the present invention;

[0050] Figure 15 and Figure 16 This is a schematic diagram of the swing mechanism controlling the head of the nail to swing along the R2 direction according to an embodiment of the present invention.

[0051] Figure label:

[0052] 11 Anastomosing Device Body 5 Driven Wheel

[0053] 111 Sleeve 51 Driven wheel rotating shaft

[0054] 112 Fixed handle 511 First end of driven wheel rotation shaft

[0055] 12 Firing handle 512 Second end of driven wheel rotation shaft

[0056] 20. Sleeve channel 52. Driven gear teeth

[0057] 2 Second housing 53 Eccentric wheel section

[0058] 21 Receiving Hole 6 Swinging Head Pull Rod

[0059] 22 Second fixing hole 61 Eccentric wheel mating part

[0060] 3. First shell 611 oblong hole

[0061] 31 Support section 62 Guiding section

[0062] 32 First fixing hole 63 Pull tab mating part

[0063] 33 Guide groove 8 Swing head pull plate

[0064] 4 drive wheel 9 nail head

[0065] 41 Knobs 91 Anvils

[0066] 42 Drive gear teeth 92 Spike cartridge assembly

[0067] 43 Slide groove 93 Connector Detailed Implementation

[0068] 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.

[0069] 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 driving wheel, a driven wheel, a swing-head lever, and a swing-head pull plate. The driving wheel includes driving wheel teeth, and the driven wheel includes driven wheel teeth and a first mating part. The driven wheel teeth mesh with the driving wheel teeth. Therefore, when the operator controls the rotation of the driving wheel, the driven wheel can be driven to rotate through the gear meshing of the driving wheel teeth and the driven wheel teeth.

[0070] The swing head lever includes a second mating part and a pull tab mating part. The swing head pull tab extends along the axial direction of the stapler and is connected to the pull tab mating part of the swing head lever. The second mating part engages with the first mating part so that when the driven wheel rotates, it drives the pull tab mating part of the swing head lever to move along the axial direction of the stapler, converting the rotational motion of the driven wheel into the axial motion of the swing head lever. Furthermore, the swing head lever drives the swing head pull tab to move axially, thereby easily and conveniently realizing the swing of the staple head relative to the stapler body. Further, this invention, through the gear engagement between the driving wheel and the driven wheel, allows for flexible adjustment of the swing direction and angle of the staple head by controlling the rotation angle of the driving wheel.

[0071] 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.

[0072] 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.

[0073] like Figures 1-2 As shown, the present invention provides a swing-head mechanism and a medical stapler including the swing-head mechanism. The medical stapler includes a staple head 9, a stapler body 11, a firing handle 12 pivotally connected to the stapler body 11, and a swing-head mechanism disposed between the staple head 9 and the stapler body 11. The stapler body 11 includes a body housing, a fixing handle 112, and a sleeve 111, 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 92 disposed opposite to each other, and a connector 93 located on the proximal end of the anvil 91 and the staple cartridge assembly 92. The swing-head mechanism includes two swing-head pull tabs 8, which are at least partially located inside the sleeve 111. Figure 2 The sleeve 111 is omitted to show the engagement between the swing head pull plate 8 and the staple head 9. The distal end of the swing head pull plate 8 is connected to the connector 93. The axial movement of the swing head pull plate 8 can control the lateral swing of the staple head 9 relative to the axis S0 of the stapler. Specifically, in Figure 2 From the perspective of [the viewpoint], when the upper swivel head pull plate 8 moves towards the proximal side and the lower swivel head pull plate 8 moves towards the distal side, the nail head 9 swings along the R1 direction. When the upper swivel head pull plate 8 moves towards the distal side and the lower swivel head pull plate 8 moves towards the proximal side, the nail head 9 swings along the R2 direction.

[0074] 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 2 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 2 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.

[0075] like Figures 3-6 As shown, the oscillating head mechanism also includes a housing, a driving wheel 4, and a driven wheel 5, with the driving wheel 4 and the driven wheel 5 forming a gear set. The driving wheel 4 and the driven wheel 5 are housed within a receiving cavity inside the housing. The oscillating head pull rod 6 is also located within the receiving cavity. Figure 6 From the perspective of [the viewpoint], the housing includes a first housing 3 located below and a second housing 2 located above. The interiors of the second housing 2 and the first housing 3 together define a sleeve channel 20 for receiving a portion of the sleeve 111. The inner surface of the first housing 3 is the first inner surface of the housing, and the inner surface of the second housing 2 is the second inner surface of the housing. The driving wheel 4 includes an operating part and a driving wheel tooth 42, and the sidewall of the driving wheel tooth 42 is at least partially provided with a first tooth surface. In this embodiment, the operating part is a knob 41 for easy manual operation by the operator. In another embodiment, the driven wheel 5 may also include an operating part, which drives the driving wheel 4 to rotate by manually operating the driven wheel 5. The driven wheel 5 includes a driven wheel tooth 52, and the sidewall of the driven wheel tooth 52 is at least partially provided with a second tooth surface, the first tooth surface meshing with the second tooth surface. Therefore, when the operator controls the rotation of the driving wheel 4 by the knob 41, the driven wheel 5 can be driven to rotate through the gear meshing at the first tooth surface and the second tooth surface. In this embodiment, two driven wheels 5 are provided, 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. 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.

[0076] like Figures 7-10As shown, the driven wheel 5's driven wheel tooth 52 facing the first housing 3 is also provided with a first mating part. In this embodiment, the first mating part is an eccentric wheel part 53, and 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 swing head mechanism also includes a swing head pull rod 6 housed in the housing. In this embodiment, there are two swing head pull rods 6 corresponding one-to-one with the driven wheels 5. The two swing head pull rods 6 are symmetrically arranged with respect to the axial direction of the anastomosis device. Each swing head pull rod 6 is connected to a swing head pull plate 8. When the driving wheel 4 rotates, the two swing head pull rods 6 move in opposite directions. The swing head pull rod 6 includes a second mating part and a pull plate mating part 63. The pull plate mating part 63 of the swing head pull rod 6 is connected to the proximal side of the swing head pull plate 8. In this embodiment, the second mating part is an eccentric wheel mating part 61, which cooperates with the eccentric wheel part 53 so that when the driven wheel 5 rotates, it drives the pull plate mating part 63 of the swing head lever 6 to move along the axial direction of the stapler, thus converting the rotational motion of the driven wheel 5 into the axial motion of the swing head lever 6. When the operator operates the drive wheel 4 to rotate via the knob 41, the drive wheel 4 drives the driven wheel 5 to rotate through the meshing of the first tooth surface and the second tooth surface. The rotation of the driven wheel 5 drives the swing head lever 6 to move along the axial direction of the stapler. Thus, the swing head pull plate 8 can be driven by the swing head lever 6 to move along the axial direction, thereby easily and conveniently realizing the swing of the staple head 9 relative to the stapler body 11. Furthermore, through the gear cooperation between the drive wheel 4 and the driven wheel 5, the swing direction and swing angle of the staple head 9 can be flexibly adjusted by controlling the rotation angle of the drive wheel 4.

[0077] like Figures 7-10 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 and protrudes outside the second housing 2. The inner surface of the first housing 3 is provided with a support portion 31 protruding from the first inner surface. The drive wheel 4 has a groove 43 on the side facing the inner surface of the first housing 3, the support portion 31 is located in the groove 43, and the drive wheel 4 is rotatable relative to the support portion 31. Figure 10As shown, the support portion 31 is an arc-shaped support portion 31, and the slide groove 43 is an annular slide groove 43. The arc-shaped support portion 31 and the annular slide groove 43 are coaxially arranged and their dimensions are matched. The slide groove 43 is coaxially arranged with the drive wheel tooth portion 42, and the diameter of the slide groove 43 is smaller than the outer diameter of the drive wheel tooth portion 42. Through the cooperation of the support portion 31 and the slide groove 43, it can be ensured that the central axis of the drive wheel 4 will not be displaced in the axial and lateral directions of the connector. In another alternative embodiment, the support portion can also be an annular support portion, which is coaxially arranged with the annular slide groove and their dimensions are matched. In yet another alternative embodiment, the support portion is an arc-shaped support portion, and the slide groove can also be an arc-shaped slide groove, with the arc length of the slide groove being greater than the arc length of the support portion, so that the support portion can have circumferential rotation space in the slide groove. In another alternative embodiment, a groove may be provided on the inner surface of the first housing 3, and a support portion may be provided on the side of the drive wheel 4 facing the inner surface of the first housing 3. The support portion is located in the groove and can rotate relative to the groove, so that the drive wheel 4 can rotate relative to the first housing 3.

[0078] like Figures 7-10 As shown, in this embodiment, the driven wheel 5 further includes a driven wheel rotation shaft 51. The inner surfaces of the second housing 2 and the first housing 3 are respectively provided with a second fixing hole 22 and a first fixing hole 32. The first end 511 and the second end 512 of the driven wheel rotation shaft 51 enter the second fixing hole 22 and the first fixing hole 32, respectively. The driven wheel rotation shaft 51 passes through the driven wheel tooth portion 52 and the eccentric wheel portion 53, and the driven wheel tooth portion 52 and the eccentric wheel portion 53 are rotatable 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.

[0079] like Figure 9 and Figure 10As shown, the first inner surface of the housing 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.

[0080] like Figure 11 and Figure 12 As shown, the driven wheel rotation shaft 51 passes through the center of the driven wheel tooth portion 52. However, the eccentric wheel portion 53 is eccentrically positioned relative to the driven wheel rotation shaft 51, that is, the center of the driven wheel rotation shaft 51 and the central axis O1 of the eccentric wheel portion 53 are separated by a first distance d1 (e.g., ...). Figure 13 (As shown). A mating hole is provided in the eccentric wheel mating portion 61 of the swing head rod 6, and the eccentric wheel portion 53 at least partially enters the mating hole. In another alternative embodiment, a mating groove may also be provided in the eccentric wheel mating portion 61 of the swing head rod 6, and the eccentric wheel portion 53 at least partially enters the mating groove. The eccentric wheel portion 53 engages with the mating groove or mating hole to drive the swing head rod 6 to move axially.

[0081] like Figure 11 and Figure 12 As shown, the oscillating head pull plate mating part 63 is a protrusion located inside the eccentric wheel mating part 61. The proximal end of the oscillating head pull plate 8 has a hole that mates with the protrusion, and the protrusion is embedded in the hole on the proximal end side of the oscillating head pull plate 8. Preferably, each side of the protrusion is a right angle to ensure the stability of the mating between the protrusion and the oscillating head pull plate 8 and to prevent accidental slippage. Preferably, the protrusion is located at the axial center of the oscillating head pull rod 6, that is, the distance from the center of the protrusion to the distal end of the oscillating head pull rod 6 is equal to the distance from the center of the protrusion to the proximal end of the oscillating head pull rod 6. This further prevents the oscillating head pull rod 6 from lateral swaying due to external forces when it pulls the oscillating head pull plate 8 axially. In another alternative embodiment, the oscillating head pull plate mating part 63 can also be a groove provided inside the eccentric wheel mating part 61, and the proximal end side of the oscillating head pull plate 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 oscillating 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 anastomosis device, which can better accommodate the sheet-like structure of the oscillating head pull plate 8.

[0082] like Figure 13 As 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, preventing the swing head pull rod 6 from laterally swaying due to the rotational movement of the eccentric wheel portion 53 during movement. The 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 13 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.

[0083] Figure 13 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.

[0084] like Figure 13 As shown, in the initial state, when the driving wheel 4 rotates along the R3 direction, the driving wheel 4 drives the driven wheel 5 to rotate along the R4 direction, and then enters the... Figure 14 The state in. Figure 14 What is shown is Figure 13 The state after the drive wheel 4 rotates 15° along the R3 direction. Figure 14 The upper swivel lever 6 shown in the image is compared to Figure 13 The middle moves along the W1 direction, that is, it moves towards the distal side. The lower sway lever 6 is compared to... Figure 13 The middle moves along the W2 direction, that is, towards the proximal side, so that the nail head 9 can move along... Figure 2 The swing is shown in the R1 direction.

[0085] like Figure 15 As shown, in the initial state, when the driving wheel 4 rotates along the R5 direction, the driving wheel 4 drives the driven wheel 5 to rotate along the R6 direction, entering the... Figure 16 The state in. Figure 16What is shown is Figure 15 The state after the drive wheel 4 rotates 30° along the R5 direction. Figure 16 The upper swivel lever 6 shown in the image is compared to Figure 15 The middle moves along the W3 direction, that is, towards the proximal side, and the lower swivel lever 6 is compared to... Figure 15 The middle moves along the W4 direction, that is, towards the distal end, so that the nail head 9 can move along... Figure 2 The R2 direction is shown as a swing. Compare. Figure 14 and Figure 16 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.

[0086] 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 swing head mechanism, characterized in that, For use in medical staplers, the swing mechanism includes: The drive wheel includes a drive wheel tooth section and an operating section, the operating section being used for manual operation; Two driven wheels, each driven wheel including a driven wheel tooth portion and a first mating portion, the driven wheel tooth portion meshing with the driving wheel tooth portion, each driven wheel including a driven wheel rotation shaft, the driven wheel rotation shaft and the central axis of the driving wheel both being parallel to the longitudinal direction, the two driven wheels being respectively disposed on the transverse sides of the driving wheel, the first mating portion being an eccentric wheel portion, the center of the driven wheel rotation shaft being at a first distance from the central axis of the eccentric wheel portion; Two swing head pull rods are provided, each of which includes a second mating part and a pull plate mating part. The second mating part is engaged with the first mating part so that when the driven wheel rotates, it drives the pull plate mating part of the swing head pull rod to move along the axial direction of the anastomosis device. The second mating part is an eccentric wheel mating part, which has a mating groove or a mating hole. The eccentric wheel part is at least partially inserted into the mating groove or the mating hole. The eccentric wheel part is engaged with the mating groove or the mating hole to drive the swing head pull rod to move along the axial direction. Two swing head pull tabs extend along the axial direction of the stapler and are respectively connected to the pull tab mating parts of the two swing head pull rods; In the initial state, the central axes of the eccentric wheel portions of the two 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 the two driven wheels are located inside the corresponding driven wheel rotation axis.

2. The swing head mechanism according to claim 1, characterized in that, It also includes a housing, which includes a receiving cavity for accommodating the driving wheel and the driven wheel.

3. The swing head mechanism according to claim 2, characterized in that, The first inner surface of the housing is provided with a support portion protruding from the first inner surface, and the drive wheel is provided with a groove on the side facing the first inner surface of the housing; or, the first inner surface of the housing is provided with a groove, and the drive wheel is provided with a support portion on the side facing the first inner surface of the housing. The support portion is located in the slide groove, and the support portion is rotatable relative to the slide groove.

4. The oscillating head mechanism according to claim 3, characterized in that, The support part is an annular support part or an arc-shaped support part, and the slide groove is an annular slide groove or an arc-shaped slide groove. The slide groove is coaxially arranged with the drive wheel tooth part.

5. The swing head mechanism according to claim 2, characterized in that, The inner surface of the housing is provided with a fourth mating part, and the driven wheel rotation shaft is mated with the fourth mating part, so that the driven wheel rotates relative to the housing.

6. The swing mechanism according to claim 5, characterized in that, The fourth mating part includes a fixing hole; The driven wheel's rotation shaft is at least partially located in the fixed hole, and the driven wheel's rotation shaft is rotatable relative to the fixed hole.

7. The swing head mechanism according to claim 6, characterized in that, The first mating part is located on the side of the driven wheel tooth facing the first inner surface of the housing.

8. The swing head mechanism according to claim 1, characterized in that, The outer contour of the eccentric wheel is circular or arc-shaped, and the mating groove or mating hole of the eccentric wheel mating part is a waist-shaped groove or waist-shaped hole.

9. The swing head mechanism according to claim 8, characterized in that, The mating groove or the mating hole of the eccentric wheel mating part is an oblong shape including two arc-shaped sides and two straight sides, and the radius of the arc-shaped sides is equal to the radius of the eccentric wheel part.

10. The swing head mechanism according to claim 9, characterized in that, The two straight edges of the mating groove or the mating hole extend laterally along the stapler.

11. The swing head mechanism according to claim 1, characterized in that, The two driven wheels are symmetrically arranged with respect to the axis of the stapler, and the two swing head rods are symmetrically arranged with respect to the axis of the stapler. When the driving wheel rotates, the two swing head rods move in opposite directions.

12. The swing head mechanism according to claim 11, characterized in that, The pull tab mating part is a protrusion provided on the inner side of the second mating part, and the proximal end of the swing head pull tab is provided with a hole that mates with the protrusion. Alternatively, the pull tab mating part is a groove provided on the inner side of the second mating part, and the proximal end of the swing head pull tab is provided with a protrusion that mates with the groove.

13. The swing head mechanism according to claim 12, characterized in that, The protrusion or the groove is located at the center of the swing head rod along the axial direction.

14. The swing head mechanism according to claim 12, characterized in that, The inner surface of the second mating part is a plane parallel to the axial direction of the stapler.

15. The oscillating head mechanism according to claim 11, characterized in that, The driven wheel is located near the end of the driving wheel.

16. The swing head mechanism according to claim 11, characterized in that, The distances from the driven wheel rotation axis of the two driven wheels to the central axis of the driving wheel are equal.

17. The swing head mechanism according to claim 2, characterized in that, The first inner surface of the housing is provided with a guide groove, which extends along the axial direction of the anastomosis device. The swing head pull rod also includes a guide part, which is located in the guide groove and is limited by the guide groove to only have axial movement.

18. The oscillating head mechanism according to claim 17, characterized in that, The swing head lever includes two guide portions, which are located on the distal and proximal sides of the second mating part, respectively. The guide portions are strip-shaped and extend along the axial direction of the stapler. In the transverse direction of the stapler, the two guide portions are respectively connected to the middle of the distal and proximal surfaces of the second mating portion.

19. The swing head mechanism according to claim 2, characterized in that, The second side surface of the housing is provided with a receiving hole, and the operating part passes through the receiving hole and protrudes outside the housing.

20. A medical stapler, characterized in that, Includes the swing mechanism as described in any one of claims 1 to 19.

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