Swing mechanism and medical anastomat

Abstract

The application provides a swing head mechanism and a medical anastomat. The swing head mechanism comprises a gear set, a swing head pull rod and a swing head pull piece, a housing and a fixing member. The gear set comprises a driving wheel and a driven wheel. The driven wheel comprises a first matching part. The swing head pull rod comprises a second matching part and a pull piece matching part. The pull piece matching part is connected to the swing head pull piece. The second matching part matches with the first matching part, so that when the driven wheel rotates, the pull piece matching part of the swing head pull rod moves along the axial direction of the anastomat. The housing comprises first and second inner surfaces and surrounds a containing cavity. The fixing member is fixed in the containing cavity and comprises third and fourth surfaces. The gear set is at least partially arranged between the fourth surface and the second inner surface of the housing. The gear set can rotate relative to the fixing member. The application can simply and conveniently realize the swing of the nail head part of the anastomat relative to the anastomat body. The gear set is fixed on the housing through the fixing member, which is beneficial to maintaining the structural stability 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, and the gear set is fixed to the housing by a fastener, which helps to maintain the structural stability of the swing head mechanism.

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

[0008] A gear set, including a driving gear and a driven gear, wherein the driving gear drives the driven gear to rotate when it rotates, and the driven gear includes a first mating part;

[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 pull plate mating part is connected to the swing head pull plate. The second mating part is mated 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.

[0010] The housing includes a first inner surface and a second inner surface, wherein the first inner surface and the second inner surface form an accommodating cavity;

[0011] A fixing member is fixedly disposed in the accommodating cavity. The fixing member 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 fourth surface and the second inner surface of the housing, and the gear set is rotatable relative to the fixing member.

[0012] In some embodiments, the sway bar is disposed between the third surface and the first inner surface of the housing, and the fixing member and the sway bar are fixed relative to the housing in the height direction.

[0013] In some embodiments, the fixing member includes a drive wheel support and a driven wheel support, wherein the drive wheel support is located between the drive wheel and the first inner surface of the housing, and the driven wheel support is located between the driven wheel and the first inner surface of the housing.

[0014] 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.

[0015] In some embodiments, the housing further includes a second inner surface, the drive wheel further includes an operating part and a drive wheel tooth part, the operating part is disposed on the side of the drive wheel tooth part facing the second inner surface of the housing, and the first fixing part is disposed on the side of the drive wheel tooth part facing the first inner surface of the housing;

[0016] The driven wheel further includes a driven wheel tooth portion, which meshes with the driving wheel tooth portion, and the first mating portion is located on the side of the driven wheel tooth portion facing the first inner surface;

[0017] The driving gear teeth and the driven gear teeth are located between the fourth surface and the second inner surface of the housing.

[0018] 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,

[0019] 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.

[0020] 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,

[0021] 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.

[0022] 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;

[0023] 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.

[0024] In some embodiments, the drive wheel support is provided with a clearance groove on the side facing the first inner surface of the housing, and a sleeve limiting part is provided on the housing opposite to the clearance groove. The clearance groove and the sleeve limiting part form a first channel along the axial direction.

[0025] In some embodiments, the surface of the relief groove and the surface of the sleeve limiting part are both arc surfaces, and the first channel is a cylindrical channel.

[0026] In some embodiments, the gear set includes two driven wheels, and 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.

[0027] The fixing member includes two driven wheel support portions, and an axially extending second channel is formed between the two driven wheel support portions.

[0028] 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.

[0029] In some embodiments, the driven wheel further includes a driven wheel rotation shaft, the driven wheel is located near the end of the driving wheel, the driven wheel rotation shafts of the two driven wheels are parallel to the central axis of the driving wheel, and the distances from the driven wheel rotation shafts of the two driven wheels to the central axis of the driving wheel are equal.

[0030] In some embodiments, the housing further includes a second inner surface, the second inner surface being provided with at least one limiting member, the limiting member restricting the axial movement of the driven wheel support.

[0031] In some embodiments, the sway bar is located between the third surface of the fixing member and the first inner surface of the housing, the driven wheel support portion of the fixing member is provided with a through hole, and the first mating portion of the driven wheel passes through the through hole and engages with the second mating portion of the sway bar.

[0032] In some embodiments, the driven wheel further includes a driven wheel rotation shaft, and the first inner surface and the second inner surface of the housing are respectively provided with a first fixing hole and a second fixing hole. The two ends of the driven wheel rotation shaft enter the first fixing hole and the second fixing hole respectively, and the driven wheel can rotate around the driven wheel rotation shaft.

[0033] 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 third mating hole, the eccentric wheel part is at least partially inserted into the mating groove or the third mating hole, and the eccentric wheel engages with the mating groove or the third mating hole to drive the swing head rod to move axially.

[0034] In some embodiments, the outer contour of the eccentric wheel portion is circular or arc-shaped, and the mating groove of the eccentric wheel mating portion or the third mating hole is an oblong groove or oblong hole.

[0035] In some embodiments, the mating groove of the eccentric wheel mating part or the third mating hole is an oblong shape including two arc-shaped sides and two straight sides, wherein the radius of the arc-shaped sides is equal to the radius of the eccentric wheel part.

[0036] In some embodiments, 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.

[0037] In some embodiments, a guide portion is provided on the distal side and the proximal side of the eccentric wheel mating portion, and the guide portion abuts against the distal sidewall and the proximal sidewall of the through hole of the driven wheel support portion in the longitudinal direction.

[0038] The first inner surface of the housing is provided with a guide groove, which extends along the axial direction of the stapler. The guide portion is located in the guide groove and is limited by the guide groove to only have axial movement.

[0039] In some embodiments, the gear set includes two driven wheels, and the oscillating head mechanism includes two oscillating head pull rods and two oscillating head pull plates. 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.

[0040] This invention also provides a medical stapler, including the aforementioned swing head mechanism.

[0041] The head-swinging mechanism and medical stapler provided by this invention have the following advantages:

[0042] 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 pull rod. Then, the swing head pull rod drives the swing head pull plate to move axially, thereby easily and conveniently realizing the swing of the staple head relative to the staple head body. Furthermore, the swing direction and swing angle of the staple head can be flexibly adjusted through the gear cooperation between the driving wheel and the driven wheel. The driving wheel and the driven wheel are fixed to the housing of the swing head mechanism by the fixing member, which helps to maintain the structural stability of the swing head mechanism and avoids the instability of the staple head position due to the instability of the gear set during use. Attached Figure Description

[0043] 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.

[0044] Figure 1 This is a schematic diagram of the structure of the head-swinging mechanism and the anastomosis device body according to an embodiment of the present invention;

[0045] Figure 2 This is a schematic diagram of the structure of the nail head and the closing pull tab in one embodiment of the present invention;

[0046] Figure 3 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;

[0047] Figure 4 This is a schematic diagram of the structure of the rear swing head mechanism with the anastomosis device body, which is omitted from the present invention, according to an embodiment of the present invention;

[0048] Figure 5 This is a schematic diagram of the swing head mechanism according to an embodiment of the present invention, omitting the housing;

[0049] Figure 6 This is a front view of the swing mechanism of an embodiment of the present invention, omitting the housing;

[0050] Figure 7 This is a schematic diagram of the structure of a gear set according to an embodiment of the present invention;

[0051] Figure 8 This is a schematic diagram of the structure of a swing head pull rod according to an embodiment of the present invention;

[0052] Figure 9 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;

[0053] 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 R1 direction according to an embodiment of the present invention;

[0054] Figure 11 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;

[0055] Figure 12 This is a schematic diagram of the structure of a fastener according to an embodiment of the present invention;

[0056] Figure 13 This is a schematic diagram of the gear set and the fixing member cooperating according to an embodiment of the present invention;

[0057] Figure 14 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;

[0058] Figure 15 This is a schematic diagram of the structure of the second housing according to an embodiment of the present invention;

[0059] Figure 16 This is a schematic diagram of the structure of the fastener and the second housing in one embodiment of the present invention;

[0060] Figure 17 This is a schematic diagram of the structure of the first housing according to an embodiment of the present invention;

[0061] Figure 18 This is a schematic diagram of the structure of the fastener and the first housing in one embodiment of the present invention.

[0062] Figure label:

[0063] 1 Anastomosis device body 52 Driven gear teeth

[0064] 11 Sleeve 53 Eccentric Wheel Section

[0065] 20 Third Channel 6 Swinging Rod

[0066] 2 Second housing 61 Eccentric wheel mating part

[0067] 21 Receiving hole 611 Waist-shaped hole

[0068] 22 Second fixing hole 62 Guide part

[0069] 23 Limiting component 63 Pull tab mating part

[0070] 30 First Channel 7 Fixture

[0071] 3 First housing 71 First fixing part

[0072] 31 Fourth fixing part 72 Third fixing part

[0073] 32 First fixing hole 73 Fifth fixing part

[0074] 33 Guide groove 74 Drive wheel support

[0075] 34 Sixth fixing part 741 Relief groove

[0076] 4. Drive wheel 75. Driven wheel support section

[0077] 41 Knob 751 Through Hole

[0078] 42 Drive gear section 79 Second channel

[0079] 43 Second fixing part 8 Swing head pull plate

[0080] 5 Driven wheel 9 Nail head

[0081] 51 Driven wheel rotating shaft 91 Anvil

[0082] 511 First end of the rotating shaft 93 Connector

[0083] 512 The second end of the rotating shaft Detailed Implementation

[0084] 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.

[0085] 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, a housing, and a fixing member. The gear set includes a driving wheel and a driven wheel. When the driving wheel rotates, it drives the driven wheel to rotate. The driven wheel includes a first mating part. The swing-head pull rod includes a second mating part and a pull plate mating part. The pull plate mating part is connected to the swing-head pull plate. The second mating part engages 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 stapler. The housing includes a first inner surface and a second inner surface, and the first inner surface and the second inner surface form an accommodating cavity. The fixing member is fixedly disposed in the accommodating cavity. The fixing member 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 fourth surface and the second inner surface of the housing, and the gear set is rotatable relative to the fixing member. Therefore, when the operator controls the rotation of the driving wheel, the driven wheel can be driven to rotate through the meshing of the gears at the first and second tooth surfaces. Through the cooperation of the first and second mating parts, the rotational motion of the driven wheel is converted into the axial motion of the swing head pull rod, and the swing head pull rod drives the swing head pull plate to move axially, thereby easily and conveniently realizing the swinging of the staple head of the stapler relative to the stapler body.

[0086] The housing includes a cavity for accommodating the gear set, and the housing includes a first inner surface. A fixing member is located between the gear set and the first inner surface of the housing. The gear set is fixed to the first inner surface of the housing by the fixing member, and the driving wheel and the driven wheel can rotate relative to the fixing member. This helps maintain the structural stability of the oscillating head mechanism, avoids instability of the pin head position due to the instability of the gear set during use, and improves the surgical effect.

[0087] 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.

[0088] 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.

[0089] This invention provides a head-swinging mechanism and a medical stapler including the head-swinging mechanism, such as... Figure 1 and Figure 2 As shown, the medical stapler includes a staple head 9, a stapler body 1, and a swing head 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 each other, and a connector 93 located on the proximal side of the anvil 91 and the staple cartridge assembly. The swing head mechanism includes a housing and two swing head pull tabs 8 passing through the housing, the housing including a first housing 3 and a second housing 2. The swing head pull tabs 8 are at least partially located inside the sleeve 11. Figure 2 The sleeve 11 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 controls the lateral swing of the staple head 9 relative to the axis S0 of the stapler. The two swing head pull plates 8 move in opposite directions during axial movement. 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.

[0090] 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.

[0091] like Figures 3-6As shown, the oscillating head mechanism further includes a gear set, an oscillating head pull rod 6, and a fixing member 7. The gear set, the oscillating head pull rod 6, and the fixing member 7 are all housed within an accommodating cavity inside the housing. The gear set includes a driving wheel 4 and a driven wheel 5. The driving wheel 4 includes an operating part and driving wheel teeth 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 manual operation of the driven wheel 5 to drive the driving wheel 4 to rotate. The driven wheel 5 includes driven wheel teeth 52, a first mating part, and a driven wheel rotation shaft 51, which passes through the driven wheel teeth 52 and the first mating part. The driven wheel teeth 52 mesh with the driving wheel teeth 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. 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 angle of the staple head 9 by controlling the rotation angle of the driving wheel 4.

[0092] 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.

[0093] When the operator controls the rotation of the drive wheel 4, the driven wheel 5 can be driven to rotate through the gear meshing at the drive wheel tooth 42 and the driven wheel tooth 52. Through the cooperation of the first and second mating parts, the rotational motion of the driven wheel 5 is converted into the axial motion of the swing head lever 6, and the swing head lever 6 drives the swing head pull plate 8 to move axially, thereby easily and conveniently realizing the swinging of the staple head 9 of the stapler relative to the stapler body.

[0094] The housing includes a first inner surface and a second inner surface, which together form an accommodating cavity. Figure 1 and Figure 3As shown, in this embodiment, the housing is divided into a first housing 3 located below and a second housing 2 located above. A third channel 20 for passage of the sleeve 11 is defined in both the first housing 3 and the second housing 2. 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. 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, preventing instability of the pin head 9 during use due to the instability of the gear set, and improving surgical results. Figure 3 and Figure 4 As shown, the fixing member 7 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 fourth surface and the second inner surface of the fixing member 7. The swaying head pull rod 6 is disposed between the third surface and the first inner surface of the fixing member 7, and the fixing member 7 and the swaying head pull rod 6 are fixed relative to the housing in the height direction.

[0095] like Figures 5-9 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, it drives the pull tab mating part 63 of the swing head pull rod 6 to move along the axial direction of the anastomosis device, converting the rotational motion of the driven wheel 5 into the axial motion of the swing head pull 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 shaft 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 shaft 51, that is, the center of the driven wheel rotation shaft 51 and the central axis O1 of the eccentric wheel part 53 are separated by a first distance d1. A third mating hole is provided in the eccentric wheel mating part 61 of the swing head pull rod 6, 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.

[0096] like Figure 3 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.

[0097] like Figure 5 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.

[0098] The following is combined Figures 9-11 The working principle of the oscillating mechanism in this embodiment is explained in detail.

[0099] like Figure 9As 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 9 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.

[0100] like Figure 10 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 10 The upper swivel lever 6 shown in the image is compared to Figure 9 The middle moves along the W1 direction, that is, it moves towards the distal side. The lower sway lever 6 is compared to... Figure 9 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.

[0101] like Figure 11 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 11 The upper swivel lever 6 shown in the image is compared to Figure 9 The middle moves along the W3 direction, that is, towards the proximal side, and the lower swivel lever 6 is compared to... Figure 9The 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 10 and Figure 11 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.

[0102] The following is combined Figure 3 , Figure 7 , Figures 12-18 The structural relationship between the fastener 7 and other components of this invention will be explained in detail. For example... Figure 3 and Figure 12 As shown, the fixing member 7 includes a driving wheel support 74 and two driven wheel supports 75. The driving wheel support 74 is located between the driving wheel 4 and the inner surface of the first housing 3, and the driven wheel supports 75 are located between the driven wheel 5 and the inner surface of the first housing 3. The oscillating head pull rod 6 is located between the driven wheel supports 75 and the inner surface of the first housing 3. The driving wheel support 74 has a relief groove 741 on the side facing the inner surface of the first housing 3, such as... Figure 17 As shown, a sleeve limiting part 35 is provided on the inner surface of the first housing 3 at a position corresponding to the relief groove 741. The relief groove 741 and the sleeve limiting part 35 enclose an axially extending first channel 30, through which the sleeve 11, fitted onto the outside of the swing head pull piece 8, passes. The surface of the relief groove 741 is preferably an arc surface, and the surface of the sleeve limiting part 35 is also preferably an arc surface. Thus, the first channel 30 is an enclosed cylindrical channel, thereby forming a better fit with the outer surface of the cylindrical sleeve 11 and providing good support for the sleeve 11. Figure 12 As shown, an axially extending second channel 79 is formed between the two driven wheel supports 75, thereby providing a second channel 79 through which the proximal end of the sleeve 11 passes.

[0103] like Figure 12 and Figure 13As 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 engages with the eccentric wheel mating portion 61 of the swing head rod 6. Therefore, in this embodiment, the driving wheel tooth portion 42 of the driving wheel 4 and the driven wheel tooth portion 52 of the driven wheel 5 are disposed between the fourth surface of the fixing member 7 and the second inner surface of the housing. Since the swing head rod 6 is located between the third surface of the fixing member 7 and the first inner surface of the housing, the eccentric wheel portion 53 engages with the swing head rod 6 after passing through the through hole 751 of the fixing member 7. Figure 13 and Figure 14 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.

[0104] like Figure 7 and Figure 13 As shown, the drive wheel support 74 has a first fixing part 71 on the side facing the drive wheel 4, and the drive wheel 4 has a second fixing part 43 on the side facing the fixing member 7. The first fixing part 71 and the second fixing part 43 are embedded together. In this embodiment, the first fixing part 71 is a first fixing post protruding from the drive wheel support 74 towards 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 74 facing the drive wheel 4, and the second fixing part can be a first fixing post protruding from the drive wheel 4 towards 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.

[0105] like Figure 15 and Figure 17As 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. Figure 15 and Figure 17 The third channel 20 marked in the text is a part of the third channel. After the first shell 2 and the second shell 3 are combined, the two parts are combined to form a complete third channel 20.

[0106] like Figure 15 and Figure 16 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.

[0107] like Figure 14 , 17 and Figure 18As 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, and 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. In a preferred embodiment, the third fixing part 72 has a non-circular cross-section, and the fourth fixing part 31 has a non-circular cross-section fixing hole, such as a triangular or polygonal cross-section, to prevent rotational movement of the fixing member 7 relative to the housing.

[0108] like Figure 14 , 17 and Figure 18As 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.

[0109] 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: A gear set includes a driving gear and a driven gear. The driving gear includes an operating part for manual operation. When the driving gear rotates, it drives the driven gear to rotate. The driven gear includes a first mating part and a driven gear rotation shaft. The central axis of the driving gear and the driven gear rotation shaft 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 pull plate mating part is connected to the swing head pull plate. The second mating part is mated 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 housing includes a first inner surface and a second inner surface, wherein the first inner surface and the second inner surface form an accommodating cavity; A fixing member is fixedly disposed in the accommodating cavity. The fixing member includes a third surface facing the first inner surface and a fourth surface facing the second inner surface. The third surface and the fourth surface are arranged opposite each other in the height direction. The gear set is at least partially disposed between the fourth surface and the second inner surface of the housing, and the gear set is rotatable relative to the fixing member. The swing head pull rod is disposed between the third surface and the first inner surface of the housing.

2. The swing head mechanism according to claim 1, characterized in that, The fixing member and the swing head tie rod are fixed relative to the housing in the height direction.

3. 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, and the driven wheel support is located between the driven wheel and the first inner surface of the housing.

4. The oscillating head mechanism according to claim 3, 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.

5. The swing mechanism according to claim 4, characterized in that, The drive wheel also includes a drive wheel tooth portion, the operating portion is disposed on the side of the drive wheel tooth portion facing the second inner surface of the housing, and the first fixing portion is disposed on the side of the drive wheel tooth portion facing the first inner surface of the housing; The driven wheel further includes a driven wheel tooth portion, which meshes with the driving wheel tooth portion, and the first mating portion is located on the side of the driven wheel tooth portion facing the first inner surface; The driving gear teeth and the driven gear teeth are located between the fourth surface and the second inner surface of the housing.

6. The swing mechanism according to claim 4, 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.

7. The swing head mechanism according to claim 3, 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.

8. The swing mechanism according to claim 7, 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.

9. The swing head mechanism according to claim 3, characterized in that, The drive wheel support is provided with a clearance groove on the side facing the first inner surface of the housing, and a sleeve limiting part is provided on the housing opposite to the clearance groove. The clearance groove and the sleeve limiting part form a first channel along the axial direction.

10. The swing head mechanism according to claim 9, characterized in that, The surfaces of the relief groove and the sleeve limiting part are both arc surfaces, and the first channel is a cylindrical channel.

11. The swing head mechanism according to claim 3, characterized in that, The gear set includes two driven wheels, and 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 portions, and an axially extending second channel is formed between the two driven wheel support portions.

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

13. The swing head mechanism according to claim 11, characterized in that, The driven wheel is located near 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.

14. The swing head mechanism according to claim 3, characterized in that, The housing also includes a second inner surface, on which at least one limiting member is provided, which restricts the axial movement of the driven wheel support.

15. The oscillating head mechanism according to claim 3, characterized in that, The driven wheel support portion of the fixing member is provided with a through hole, and the first mating portion of the driven wheel passes through the through hole and then mates with the second mating portion of the swing head pull rod.

16. The swing head mechanism according to claim 15, characterized in that, The first inner surface and the second inner surface of the housing are respectively provided with a first fixing hole and a second fixing hole. The two ends of the driven wheel rotation shaft enter the first fixing hole and the second fixing hole respectively, and the driven wheel can rotate around the driven wheel rotation shaft.

17. The swing head mechanism according to claim 16, characterized in that, The first mating part is an eccentric wheel part, and 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, and a mating groove or a third mating hole is provided in the eccentric wheel mating part. At least part of the eccentric wheel part 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.

18. The oscillating head mechanism according to claim 17, characterized in that, The outer contour of the eccentric wheel is circular or arc-shaped, and the mating groove of the eccentric wheel mating part or the third mating hole is an oblong groove or oblong hole.

19. The swing head mechanism according to claim 17, characterized in that, The mating groove of the eccentric wheel mating part or the third mating hole 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.

20. The swing head mechanism according to claim 17, characterized in that, 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.

21. The swing head mechanism according to claim 20, characterized in that, A guide portion is provided on the distal and proximal sides of the eccentric wheel mating part, and the guide portion abuts against the distal and proximal sidewalls of the through hole of the driven wheel support part in the longitudinal direction. The first inner surface of the housing is provided with a guide groove, which extends along the axial direction of the stapler. The guide portion is located in the guide groove and is limited by the guide groove to only have axial movement.

22. The swing head mechanism according to claim 17, characterized in that, The gear set includes two driven wheels, and the oscillating head mechanism includes two oscillating head pull rods and two oscillating head pull plates. 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.

23. A medical stapler, characterized in that, Includes the swing mechanism as described in any one of claims 1 to 22.

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