CN116077116A - Driving mechanism and medical anastomat - Google Patents

Abstract

The present invention provides a driving mechanism and a medical stapler. The driving mechanism comprises: a nail case shell connected between the nail head and the stapler body; a firing rod at least partly located inside the nail case shell, and The firing rod extends into the nail head along the axial direction of the stapler body; the inner connecting part includes a fixing part, a deforming part and a limiting part arranged in sequence from the distal end side to the proximal end side; the outer connecting part includes a first outer sleeve part , the second outer jacket part and the third outer jacket part; the fixed part and the first outer jacket part are fixedly connected to the proximal side of the nail head, and the limiting part and the third outer jacket part are fixedly connected to the distal side of the nail box shell; the inner and outer connectors The first channel is defined, and the firing rod is passed through it. When the nail head swings, the firing rod swings with the nail head, and the deformation part and the second jacket part are at least partially deformed with the swing of the nail head. The invention connects the nail head to the shell of the nail box by setting the inner and outer connecting parts, and limits the deformation of the firing rod.

Description

Driving mechanism and medical stapler

technical field

The invention relates to the technical field of medical instruments, in particular to a driving mechanism and a medical stapler.

Background technique

A medical stapler generally includes a stapler body and a nail head, the distal side of the stapler body is provided with a nail case, the distal side of the nail case is equipped with the nail head, and the nail case is A firing rod extending axially along the shell of the nail magazine is arranged inside the casing, and the distal side of the firing rod extends into the nail head. When firing the stapler, the firing rod is driven to move toward the distal side of the stapler by operating the firing handle provided on the body, and driven by the firing rod, the nail head can cut and suture the tissue .

In the prior art, in order to achieve more operating angles, the nail head can be set to be able to swing relative to the nail magazine shell, and when the nail head swings, it will drive the firing rod to swing together. Therefore, The firing rod can be bent to a certain extent, but it is difficult to accurately control the amount of bending deformation of the firing rod. In addition, the existing firing rods are generally formed by stacking a plurality of push blades. When the firing rod is bent, the stacked push blades will spread out at the bent part, resulting in a large deformation of the firing rod, causing the firing rod to If the force becomes larger, it is easy to cause the failure of the operation.

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

Contents of the invention

Aiming at the problems in the prior art, the object of the present invention is to provide a driving mechanism and a medical stapler, by arranging an inner connecting piece and an outer connecting piece, the nail head is connected to the shell of the nail case, and the deformation of the firing rod is controlled. limited.

An embodiment of the present invention provides a driving mechanism for a medical stapler. The medical stapler includes a stapler body and a nail head located on the distal side of the stapler body; the driving mechanism includes:

The nail magazine shell is connected between the nail head and the stapler body;

a firing rod, the firing rod is at least partly located inside the shell of the nail magazine, and the firing rod extends into the nail head along the axial direction of the stapler body;

The inner connecting piece includes a fixing part, a deforming part and a limiting part arranged in sequence from the distal end side to the proximal end side;

The external connecting piece includes a first sheath part, a second sheath part and a third sheath part sheathed on the outside of the fixing part, the deformation part and the limiting part respectively;

The fixing part and the first outer casing part are fixedly connected to the proximal side of the nail head, and the limiting part and the third outer casing part are fixedly connected to the distal side of the nail magazine shell;

Wherein, the inner connecting piece and the outer connecting piece jointly define a first channel extending in the axial direction, the firing rod is passed through the first channel, and the nail head is positioned relative to the stapler body. When axially oscillating, the firing rod oscillates with the nail head, and at least part of the deformation portion and the second sleeve portion are deformed with the sway of the nail head.

In some embodiments, when the nail head swings to the first side relative to the axial direction of the stapler body, the deformation portion and the first side of the second outer sleeve portion are at least partially compressed and deformed, so that The deformable portion and the second side of the second jacket portion are at least partially stretched;

When the nail head swings to the second side relative to the axial direction of the stapler body, the deformation portion and the first side of the second outer sleeve portion at least partially undergo tensile deformation, and the deformation portion and the first side of the second outer sleeve portion are at least partially stretched. The second side of the second jacket portion is at least partially compressively deformed.

In some embodiments, the nail head includes a staple cartridge rack, a pin hole is provided on the distal side of the fixing part, and the pin hole is exposed outside the first outer casing part, and the fixing part and The cartridge racks are connected by a connecting pin that at least partially enters the pin hole.

In some embodiments, a fixing sleeve is provided on the proximal side of the staple cartridge rack, and the fixing portion at least partially enters the interior of the fixing sleeve.

In some embodiments, the fixing portion of the inner connecting member and the first outer casing portion of the outer connecting member are connected by at least one fixing pin.

In some embodiments, the driving mechanism further includes an oscillating pull rod extending axially, and one of the fixing pins passes through the fixing portion, the first outer sleeve portion and the distal end side of the oscillating pull rod simultaneously. .

In some embodiments, a second channel is opened on one side of the outer connecting member, a third channel is opened at a position opposite to the second channel on the inner connecting member, and the swing head rod is passed through the the second channel and the third channel.

In some embodiments, the position of the second channel corresponding to the distal side of the swing head rod is provided with a relief groove concave toward the outside, and a fixing hole is opened in the relief groove, and one of the fixing holes The pin passes through the fixing hole and the distal side of the swing head rod simultaneously.

In some embodiments, the inner connecting piece includes a first inner connecting piece and a second inner connecting piece, the first inner connecting piece is located on a side of the second inner connecting piece away from the bottom surface of the nail head , the first inner connecting part includes a first fixing part, a first deformation part and a first limiting part, and the second inner connecting part includes a second fixing part, a second deforming part and a second limiting part;

The first fixing part, the second fixing part and the first sheath part are fixedly connected to the proximal end side of the nail head through the fixing pin.

In some embodiments, the limiting portion of the inner connecting member and the third outer outer portion of the outer connecting member are connected to the distal side of the magazine shell through at least one limiting pin.

In some embodiments, a cutter is provided on the proximal side of the nail head, and a cutter slot is provided on the distal side of the fixing part, and the cutter slot communicates with the first channel, and initially In the state, the cutter partially enters the cutter groove.

In some embodiments, the deformation portion is provided with a plurality of first grooves, and the second outer casing portion is provided with a plurality of second grooves.

In some embodiments, the first groove is an arc groove diverging from the central axis of the deformation part, or the first groove extends along the transverse direction, and the plurality of first grooves The ends of each are independent free ends, the first groove has a first width near the axis, and a second width away from the axis, and the first width is greater than the second width;

The second groove is an arc groove diverging from the central axis of the second jacket part, or the second groove extends along the transverse direction, and the ends of the plurality of second grooves are respectively An independent free end, the second groove has a third width near the axis, and a fourth width away from the axis, and the fourth width is greater than the third width;

Ends of the plurality of first grooves are opposite to ends of the plurality of second grooves.

In some embodiments, the upper side and/or the lower side of the second jacket part are provided with an axially extending insertion groove, and the deformation part is provided with an insertion part embedded in the insertion groove, and the shape of the insertion part is adapted to the shape of the embedding groove; or,

The upper side and/or the lower side of the deformation part are provided with an axially extending insertion groove, and the second outer sleeve part is provided with an insertion part embedded in the insertion groove, and the shape of the insertion part is consistent with that of the insertion groove. The shape fits.

In some embodiments, the second groove is provided on both sides of the embedding groove, and the third groove is provided on the left and right sides of the second jacket part;

The ends of the plurality of third grooves are independent free ends, the third grooves have a fifth width near the axis, and a sixth width away from the axis, and the fifth width is larger than the sixth width

In some embodiments, when the nail head oscillates relative to the axial direction of the stapler body, the firing rod swings with the nail head, and the limiting portion does not deform, or the limiting portion The amount of deformation is smaller than that of the deformation portion.

In some embodiments, the first inner connecting member is provided with a first limiting hole, the second inner connecting member is provided with a second limiting hole, and the limiting pin is fixedly connected to the first limiting hole. hole and the second limiting hole.

In some embodiments, the third outer outer portion of the outer connecting member is provided with a first limiting groove extending axially, and the limiting pin is located in the first limiting groove and can move in the axial direction.

In some embodiments, the first inner connecting piece is provided with a second limiting groove, the second inner connecting piece is provided with a third limiting groove, and the limiting pin is movably connected to the second limiting groove. groove and the third limiting groove, the third outer sleeve part of the outer connector is provided with a first limiting groove extending in the axial direction, and the limiting pin is movably arranged in the first limiting groove, the In the second limiting groove and the third limiting groove.

In some embodiments, the cross section of the limiting pin is waist-shaped, and the long axis of the waist is parallel to the axial direction;

The cross-sections of the first limit groove, the second limit groove and the third limit groove are waist-shaped and the long axis of the waist shape is parallel to the axial direction;

The size and shape of the second limiting groove and the third limiting groove are the same, the first limiting groove has a first axial length, the second limiting groove and the third limiting groove Having a second axial length, the first axial length is greater than the second axial length.

In some embodiments, a fixing groove is provided on the inner side of the nail magazine shell, and the limiting portion and the third outer sleeve portion are embedded in the fixing groove;

A nail box hole is provided at the bottom of the fixing groove of the nail box shell, and the limiting pin at least partially enters the nail box hole.

In some embodiments, the fixing groove includes a first fixing groove and a second fixing groove, the limiting part and the third outer sleeve part enter the first fixing groove, the deformation part and the second fixing groove The outer casing portion at least partially enters the second fixing groove, the width of the second fixing groove is greater than the width of the first fixing groove, and the outer side wall of the second outer casing portion is in contact with the inner side of the second fixing groove. There is a first gap between the walls.

In some embodiments, the limiting portion includes a connecting portion and a reinforcing portion, the connecting portion is connected between the reinforcing portion and the deforming portion, and the transverse width of the reinforcing portion is larger than the transverse width of the connecting portion .

In some embodiments, a lubricating structure is provided between the inner connector and/or the outer connector.

In some embodiments, the inner connector and/or the outer connector are made of different materials.

An embodiment of the present invention also provides a medical stapler, including the above-mentioned driving mechanism.

The drive mechanism and medical stapler provided by the present invention have the following advantages:

The invention provides a driving mechanism for a medical stapler. By setting an inner connector and an outer connector, the nail head is connected to the shell of the magazine, and a deformation part and a limiting part are set in the inner connector. When the head swings relative to the stapler body, the firing rod also bends with the swing of the nail head, and the deformation part also bends in the same direction to produce deformation, and the deformation part and the limiting part provide the limit for the firing rod when bending With the holding function, the firing rod is restricted by the deformation part and the limiting part without excessive deformation, effectively limiting the deformation of the firing rod. Further, in the case where the firing rod is formed by stacking a plurality of push blades, due to the limiting and maintaining effect of the deformation part and the limiting part, when the firing rod is bent, the multiple push blades will not splay outwards, Improve the surgical effect.

Description of drawings

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

Fig. 1 is a structural schematic diagram of the cooperation between the driving mechanism and the nail head according to the first embodiment of the present invention;

Fig. 2 is a schematic diagram after omitting the anvil shell and the staple cartridge rack in Fig. 1;

Fig. 3 and Fig. 4 are the structural schematic diagrams of the connector of the first embodiment of the present invention;

Fig. 5 is a structural schematic diagram of the cooperation between the connecting piece and the firing rod and the swing head rod according to the first embodiment of the present invention;

Fig. 6 is an exploded view of the cooperation between the connecting piece and the firing rod according to the first embodiment of the present invention;

Fig. 7 is an exploded view of the cooperation between the connecting piece and the swing head rod according to the first embodiment of the present invention;

Fig. 8 is a schematic structural view of the external connector of the first embodiment of the present invention;

Fig. 9 is a schematic structural view of a first inner connector according to the first embodiment of the present invention;

Fig. 10 is a schematic structural view of an inner connector according to the first embodiment of the present invention;

Fig. 11 is a schematic structural view of the driving mechanism of the first embodiment of the present invention;

Fig. 12 is a structural schematic diagram of the driving mechanism omitting the connecting rod according to the first embodiment of the present invention;

Fig. 13 is a structural schematic diagram of the cooperation between the connector and the second nail magazine shell according to the first embodiment of the present invention;

Fig. 14 is a schematic structural view of the second nail magazine shell of the first embodiment of the present invention;

Fig. 15 is a schematic structural view of a connector according to a second embodiment of the present invention;

Fig. 16 is an exploded view of the cooperation between the connecting piece and the firing rod according to the second embodiment of the present invention;

Fig. 17 is a schematic structural view of an external connector according to a second embodiment of the present invention;

Fig. 18 is a schematic structural view of a connector according to a third embodiment of the present invention;

Fig. 19 is an exploded view of a connecting piece according to a third embodiment of the present invention.

Reference signs:

10 casing 332 second reinforcement

1 Nail box shell 333 Second connecting part

11 The first nail magazine shell 334 The third limiting groove

113 The first nail box hole 4 External connecting piece

114 Embedding groove of connecting rod 41 First outer jacket part

12 The second nail magazine shell 411 The third fixing hole

121 The first fixing slot 42 The second jacket part

122 Second fixing slot 421 First insertion slot

123 Second nail box hole 422 Second insertion groove

2 The first inner connecting piece 423 The second groove

21 The first fixed part 424 The third groove

211 The first fixing hole 43 The third jacket part

212 The first give way slot 431 The first limit slot

213 The first cutting groove 51 Fixed pin

214 Pin hole 52 Limit pin

22 First deformation part 6 Nail head

221 First embedded part 61 Staple cartridge

222 The first groove 62 Nail magazine rack

23 First limited part 621 Fixed sleeve

231 First limit hole 623 Connecting column

232 First reinforcement part 63 Cutter

233 first connection part 64 nail anvil shell

234 Second limit slot 65 Connecting pin

3 Second inner connecting piece 66 Connecting rod

31 Second fixed part 661 Through hole

311 Second fixing hole 67 Anvil body

312 Second give way slot 7 Swing head lever

313 Second cutting knife groove 8 Firing lever

32 Second deformation part 81 Push blade

321 Second embedded part 91 First channel

33 Second limited department 921 Second channel

331 The second limit hole 922 The third channel

Detailed ways

Example embodiments will now be described more fully with reference to the accompanying drawings. Example embodiments may, however, be embodied in many forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of example embodiments to those skilled in the art. The same reference numerals denote the same or similar structures in the drawings, and thus their repeated descriptions will be omitted.

The invention provides a driving mechanism for a medical stapler and a medical stapler comprising the driving mechanism. The medical stapler includes a stapler body and a nail head located on the distal side of the stapler body. The stapler body includes an instrument platform and a firing handle rotatably connected to the instrument platform. The driving mechanism includes: a nail magazine shell, connected between the nail head and the stapler body; a firing rod, at least partly located inside the nail magazine shell, and the firing rod is along the The axial direction of the stapler body extends into the nail head; the inner connector includes a fixed part, a deformation part and a limiting part arranged in sequence from the distal end side to the proximal end side; the outer connector includes respectively sleeved The first sheath part, the second sheath part and the third sheath part outside the fixing part, the deformation part and the limiting part; wherein, the fixing part and the first sheath part are fixedly connected to the nail head The proximal end side of the said limiting portion and the third outer sleeve portion are fixedly connected to the distal end side of the magazine housing; the inner connecting member and the outer connecting member jointly define a first channel extending axially, The firing rod is passed through the first passage, and when the nail head swings axially relative to the stapler body, the firing rod swings with the nail head, and the deformation part and the The second outer sleeve portion is at least partly deformed with the swing of the nail head, and the deformation portion and the restriction portion provide a limiting and maintaining effect on the firing rod when it is bent, and the firing rod is restricted by the deformation portion and the restriction portion without being restricted. Excessive deformation will be generated, effectively limiting the deformation of the firing rod.

The structure of the driving mechanism of each specific embodiment of the present invention will be described in detail below in conjunction with the accompanying drawings. It should be understood that each specific embodiment is not intended to limit the protection scope of the present invention.

1-14 show the structure of the driving mechanism and the cooperation between the driving mechanism and the nail head 6 according to the first embodiment of the present invention. The first embodiment of the present invention provides a driving mechanism for a medical stapler and a medical stapler including the driving mechanism. The medical stapler includes a stapler body and a nail head 6 located at the distal side of the stapler body. The stapler body includes an instrument platform and a firing handle rotatably connected to the instrument platform. The structure of the instrument platform may vary with different types of staplers. For example, the instrument platform of a stapler includes a platform outer shell, a rack structure located inside the platform outer shell, and a swing head for controlling the swing of the nail head. Knobs etc. When the stapler is fired, the operator can drive the firing rod to move toward the distal side of the stapler through the cooperation of the firing handle and the rack structure by holding the firing handle. As shown in Figures 1 and 2, the nail head 6 includes a staple cartridge assembly and an anvil that are oppositely arranged, and the staple cartridge assembly includes a staple cartridge 61 carrying staples, a staple cartridge rack carrying the staple cartridge 61 62, firing block (not shown in the figure) and cutter 63. The anvil includes an anvil housing 64 and an anvil body 67 , the proximal side of the anvil housing 64 is rotatably connected to the proximal side of the staple cartridge holder 62 .

In the present invention, the distal side and the proximal side are relative to the operator, the end closer to the operator is the proximal side, and the end farther away from the operator, that is, the end closer to the surgical site is the far side. End side, the direction along the axis of the stapler is the axial direction, that is, the direction from the distal side to the proximal side of the stapler, or the direction from the proximal side to the distal side of the stapler. For example, in the viewing angle of FIG. 1 , for the staple cartridge rack 62 , the distal end side is the left side, and the proximal end side is the right side. The S1 direction in FIG. 1 is the direction from the distal side to the proximal side of the stapler. Define the S1 direction in Figure 1 or the direction opposite to the S1 direction as the axial direction of the stapler. Define the S2 direction in Figure 1 as the longitudinal direction, that is, the height direction. The direction S3 in FIG. 3 is defined as the transverse direction, that is, the width direction, which may also be called the radial direction. In the present invention, for a component, the inside and outside are relative to the axis of the stapler, the side close to the axis is the inside, and the side away from the axis is the outside.

As shown in Figures 1 and 2, the drive mechanism includes a nail magazine casing 1, a firing rod 8 and a connecting piece, the connecting piece includes an inner connecting piece and an outer connecting piece 4 sleeved on the outside of the inner connecting piece , the inner connecting piece at least includes the first inner connecting piece 2 . The magazine shell 1 is connected between the nail head 6 and the stapler body. In this embodiment, the nail magazine housing 1 includes a first nail magazine housing 11 and a second nail magazine housing 12, and the first nail magazine housing 11 and the second nail magazine housing 12 jointly define an accommodating space . A circular tube-shaped casing 10 is sheathed on the outside of the nail magazine casing 1 . The firing rod 8 is formed by stacking a plurality of pushing blades 81 in the transverse direction. The firing rod 8 is at least partly located inside the accommodating space of the nail magazine housing 1, and the firing rod 8 extends into the nail head 6 along the axial direction of the stapler body so as to be compatible with the nail A cutter 63 in the head 6 cooperates.

As shown in Figures 3 to 6, the first inner connector 2 includes a first fixing part 21, a first deformation part 22 and a first limiting part 23 arranged in sequence from the distal end side to the proximal end side. The fixing part 21 is connected to the proximal side of the nail head 6 , and the first limiting part 23 is connected to the distal side of the nail magazine shell 1 . The outer connector 4 includes a first sheath part 41, a second sheath part 42 and a third sheath part 43, the first sheath part 41 is sheathed on the outside of the first fixing part 21, and the second sheath part The part 42 is sleeved on the outside of the first deforming part 22, the third outer sleeve part 43 is sleeved on the outside of the first limiting part 23, and the third outer sleeve part 43 is also connected to the nail magazine shell 1 on the distal side. The first inner connecting piece 2 and the outer connecting piece 4 jointly define a first channel 91 extending axially, and the firing rod 8 passes through the first channel 91 . Thus, the nail head can be connected to the distal side of the magazine housing 1 via the first inner connecting piece 2 and the outer connecting piece 3 . The proximal side of the staple cartridge frame 62 is provided with a fixing sleeve 621, the first fixing portion 21 at least partially enters the inside of the fixing sleeve 621, the anvil shell 64, the first fixing portion 21 and the The staple cartridge racks 62 are connected by a connecting pin 65 . Specifically, a pin hole 214 is provided on the distal side of the first fixing part 21 , and the pin hole 214 is exposed outside the first outer casing part 41 . The connecting pin 65 at least partially enters the pin hole 214 after passing through the anvil shell 64 and the staple cartridge frame 62 . In this embodiment, the proximal side of the nail head 6 is provided with a cutting knife 63, and the distal side of the first fixing part 21 is provided with a first cutting groove 213, and the first cutting groove 213 It communicates with the first channel 91 , and in an initial state, the cutting knife 63 partially enters the first cutting groove 213 . When the stapler is fired, when the firing rod 8 is driven to move toward the distal side of the stapler, the firing rod 8 drives the cutter 63 to move toward the distal side, and the cutter 63 drives the firing block in the staple cartridge assembly to move toward the distal side. Direction movement to push out the staples in the staple cartridge 61, and at the same time, the cutter 63 cuts the tissue, so as to realize the suturing and cutting of the tissue. The first inner connecting part 2 and the outer connecting part 4 can be made of different materials, for example, the first inner connecting part 2 is made of a material whose hardness is less than that of the outer connecting part 4, and when the firing rod 8 is bent It can better adapt to the deformation of the firing rod 8, while the outer connecting piece 4 provides better support.

In this embodiment, when the nail head 6 swings axially relative to the stapler body, that is, when the nail head 6 swings laterally, the firing rod 8 swings with the nail head 6, The first deformation portion 22 and the second outer casing portion 42 are at least partially deformed with the swing of the nail head 6 . Specifically, when the nail head 6 swings to the first side relative to the axial direction of the stapler body, at least part of the first deformation part 22 and the first side of the second outer sleeve part 42 are compressed and deformed. , the first deformation portion 22 and the second side of the second jacket portion 42 are at least partially stretched and deformed. When the nail head 6 swings to the second side relative to the axial direction of the stapler body, the first side of the first deformation part 22 and the second outer sleeve part 42 at least partially undergoes tensile deformation, so The first deformation part 22 and the second side of the second outer casing part 42 are at least partially compressed and deformed. When the nail head 6 swings relative to the axial direction, the first limiting portion 23 does not deform, or although it deforms, the deformation amount is smaller than the deformation amount of the first deformation portion 22, and the third outer sleeve portion 43 does not Deformation occurs, or although deformation occurs, the amount of deformation is smaller than that of the second jacket portion 42 . Therefore, the firing rod 8 is restricted by the first deformation portion 22 and the first limiting portion 23 without excessive deformation, thereby effectively limiting the deformation of the firing rod 8 and avoiding multiple pushes. The blades 81 spread apart from each other when bent, improving the surgical results. The deformation here refers to the degree of deformation of a part relative to its initial state. For example, the deformation is measured by the angle between the center line of a part after deformation and the center line in the initial state. The larger the angle, the greater the deformation. big.

As shown in FIGS. 3 to 6 , in this embodiment, the inner connecting piece further includes a second inner connecting piece 3 . The first inner connecting part 2 is located on the side of the second inner connecting part 3 away from the bottom surface of the nail head 6, and the second inner connecting part 3 includes a second fixing part 31 and a second deforming part 32 and the second limiting portion 33 . That is, the fixing portion of the inner connecting member includes the first fixing portion 21 and the second fixing portion 31, and the deforming portion of the inner connecting member includes the first deforming portion 22 and the second deforming portion 32, so The limiting portion of the inner connector includes the first limiting portion 23 and the second limiting portion 33 . The first fixing part 21 , the second fixing part 31 and the first outer casing part 41 are connected by at least one fixing pin 51 . Specifically, the first fixing part 21 is provided with a first fixing hole 211, the second fixing part 31 is provided with a second fixing hole 311, and the first outer casing part 41 is provided with a third fixing hole 411. The fixing pin 51 passes through the first fixing hole 211 , the second fixing hole 311 and the third fixing hole 411 at the same time. The distal side of the second fixing part 31 is provided with a second cutter groove 313 communicating with the first channel 91 , and in the initial state, the cutter 63 at least partially enters the second cutter groove 313 middle. In this embodiment, there are two fixing pins 51, which are respectively located on both sides of the connector, and the two fixing pins 51 can ensure that the first fixing part 21, the second fixing part 31 and the second fixing part A non-rotatable connection is formed between the outer casing parts 41 . As shown in Figures 5-8, the drive mechanism further includes a swing head rod 7 extending in the axial direction, and one of the fixing pins 51 passes through the first fixing part 21, the second fixing part 22, the The first sheath portion 41 and the distal end side of the swing head rod 7 are described. A second channel 921 is opened on one side of the outer connecting member 4, and a third channel 922 is opened at a position opposite to the second channel 921 of the inner connecting member. The second channel 921 and the third channel 922 are connected to form a pull rod channel, and the swing head pull rod 7 is passed through the pull rod channel. As shown in Fig. 7 and Fig. 9, the position of the first inner connecting member 2 corresponding to the distal end side of the swing head rod 7 is provided with a first relief groove 212 concaved toward the outside, and one of the first The fixing hole 211 is disposed in the first relief groove 212, and the second internal connecting member 3 is provided with a second relief groove 312 recessed toward the outside at a position corresponding to the distal end side of the swing head rod 7 , one of the second fixing holes 311 is disposed in the second relief groove 312 . The first deforming portion 22 and the second deforming portion 32 also have a yielding structure at positions corresponding to the third channel 922 to yield to the swing head rod 7 .

As shown in FIG. 3 and FIG. 4 , in this embodiment, the upper side of the second outer sleeve portion 42 is provided with an axially extending first insertion groove 421 , and the lower side is provided with an axially extending second insertion groove 422 , the first deformation part 22 is provided with a first insertion part 221 which is inserted into the first insertion groove 421 , and the second deformation part 32 is provided with a second insertion part 321 which is inserted into the second insertion groove 422 . The shape of the first embedding portion 221 is adapted to the shape of the first embedding groove 421 , and the shape of the second embedding portion 321 is adapted to the shape of the second embedding groove 422 , thus, the first embedding portion 321 is adapted to the shape of the second embedding groove 422 . A non-rotatable connection is formed among the first deformation part 22 , the second deformation part 32 and the second outer casing part 42 . In another alternative embodiment, the upper side of the first deformation part may be provided with an axially extending first insertion groove, and the lower side of the second deformation part may be provided with an axially extending second groove. An embedding groove, the inner surface of the upper side wall of the second jacket part is provided with a first embedding part embedded in the first embedding groove, and the inner surface of the lower side wall is provided with a second embedding part embedded in the second embedding groove department.

As shown in Fig. 5 and Fig. 6, in this embodiment, in order to further improve the deformability of the deformation part and the second outer casing part 42, avoid the influence of the deformation part and the second outer casing part 42 on the nail head. The smoothness of the swing of the part 6, the first deformation part 22 and the second deformation part 32 are respectively provided with a plurality of first grooves 222 to enhance the deformation of the first deformation part 22 and the second deformation part 32 Ability, the second casing part 42 is provided with a plurality of second grooves 423 to enhance the deformation capability of the second casing part 42 . In this embodiment, the first groove 222 extends along the lateral direction, and the first groove 222 provided on the first deformation part 22 communicates with the upper surface and the lower surface of the first deformation part 22, and is provided on the first deformation part 22. The first groove 222 of the second deformation part 32 communicates with the upper surface and the lower surface of the second deformation part 32 . The ends of the plurality of first grooves 222 are independent free ends. The first grooves 222 have a first width near the axis and a second width away from the axis. The first width is greater than the second width. The end of the first groove 222 is an end away from the axis.

As shown in FIG. 6, the second groove 423 extends along the lateral direction, and the second groove 423 is respectively formed on the inner surface of the first embedding groove 421 and the second embedding groove 422, and communicates with the first embedding groove 422. The inner surface and the outer surface of the outer casing 42 . The ends of the plurality of second grooves 423 are independent free ends, the second grooves 423 have a third width near the axis, and a fourth width away from the axis, and the fourth width is greater than the third width. The end of the second groove 423 is an end close to the axis. Therefore, the ends of the plurality of first grooves 222 are opposite to the ends of the plurality of second grooves 423 .

In another alternative embodiment, the first groove may also be an arc groove diverging outward from the central axis of the first deformation part 22/second deformation part 32, and the second groove It is an arc groove that diverges outward from the central axis of the second jacket portion 42 . In other alternative implementation manners, the first groove and the second groove may also adopt other shapes and/or other arrangements.

As shown in FIGS. 3-6 , the first limiting portion 23 is fixedly connected to the second limiting portion 33 , and the first limiting portion 23 can only move axially relative to the third outer casing portion 43 . Specifically, the first limiting portion 23 and the second limiting portion 33 are provided with a limiting pin 52, and the third outer sleeve portion 43 is provided with a first limiting groove 431 extending in the axial direction, and the limiting pin 52 at least partly enters the first limiting groove 431 , and the limiting pin 52 is axially movable relative to the first limiting groove 431 .

As shown in FIG. 6 , in this embodiment, the first limiting portion 23 is provided with a first limiting hole 231 , the second limiting portion 33 is provided with a second limiting hole 331 , and the limiting pin 52 Pass through the first limiting hole 231 and the second limiting hole 331 at the same time. The width of the first limiting groove 431 is basically consistent with the outer diameter of the limiting pin 52, so as to ensure that the limiting pin 52 can only move axially relative to the first limiting groove 431 without There is movement in other directions. The inner diameters of the first limiting hole 231 and the second limiting hole 331 are the same as the outer diameter of the limiting pin 52 to keep the first limiting portion and the second limiting portion fixedly connected. In this embodiment, four limit pins 52 are provided, two are arranged on the left side of the first passage 91 and arranged along the axial direction, two are arranged on the right side of the first passage 91 and arranged along the axis Arranged in the direction, the upper side wall and the lower side wall of the third outer casing part 43 are respectively provided with a first limiting groove 431, and the left side of the upper side wall of the third outer casing part 43 is provided with a first limiting groove 431, a first limiting groove 431 is arranged on the right side, and the lower side walls are the same. This structure can avoid the rotational movement among the first limiting part, the second limiting part and the third outer casing part 43 , so that they form a non-rotatable connection. In other alternative implementations, the number and arrangement of the limiting pins 52 can be selected according to needs, and are not limited to the structure shown in FIG. 6 .

In another alternative embodiment, the first limiting fit portion of the first inner connecting piece 2 and the second inner connecting piece 3 is a limiting groove extending in the axial direction, and the outer connecting piece 4 The second position-limiting matching part is a position-limiting pin passing through the third outer sleeve part 43, and the position-limiting pin at least partially enters the position-limiting slot and can move along the extending direction of the position-limiting slot. It is possible to form a non-rotatable connection between the first limiting portion 23, the second limiting portion 33 and the third outer casing portion 43, and the first limiting portion 23 and the second limiting portion 33 can only have relative Axial movement of the third jacket part 43 .

As shown in FIG. 1 , in this embodiment, the fixing sleeve 621 of the staple cartridge rack 62 is provided with a connecting column 623 . As shown in FIG. 1 and FIG. 11 , the nail head 6 is rotatably connected to the nail magazine casing 1 through a connecting rod 66 . A through hole 661 is disposed on a distal side of the connecting rod 66 , and the through hole 661 is sheathed on the connecting post 623 and can rotate relative to the connecting post 623 . The upper surface of the first nail magazine shell 11 is provided with a connecting rod insertion groove 114 , and the proximal side of the connecting rod 66 is embedded in the connecting rod insertion groove 114 . In this embodiment, two connecting rods 66 are provided, which are located above the first nail magazine shell 11 and below the second nail magazine shell 12 respectively. The lower surface of the second nail magazine shell 12 is also provided with a connecting rod insertion groove 114 for inserting a connecting rod 66 . As shown in Figures 12 to 14, in this embodiment, the inner side of the second nail box casing 12 is provided with a fixing groove, and similarly, the inner side of the first nail box casing 11 is also provided with a fixing groove (in the figure). not shown), the first limiting portion 23, the second limiting portion 33 and the third outer casing portion 43 are embedded in the fixing groove. The bottom of the fixing groove of the first nail box shell 11 is provided with a first nail box hole 113, the bottom of the fixing groove of the second nail box shell 12 is provided with a second nail box hole 123, and the stop pin 52 at least partially enter the first nail box hole 113 and the second nail box hole 123, thereby fixing the first limiting portion and the second limiting portion to the first nail box shell 11 and the second Nail box shell 12.

As shown in Fig. 13 and Fig. 14, in this embodiment, the fixing groove includes a first fixing groove 121 and a second fixing groove 122, and the first limiting part 23, the second limiting part 33 and the third limiting part The sheath portion 43 enters into the first fixing groove 121 , and the first deformation portion 22 , the second deformation portion 32 and the second sheathing portion 42 at least partly enter into the second fixing groove 122 . As shown in FIG. 7, the width of the first deformation portion 22 is greater than the width of the first limiting portion 23, the width of the second deformation portion 32 is greater than the width of the second limiting portion 33, and the second The width of the jacket portion 42 is greater than the width of the third jacket portion 43 . Correspondingly, as shown in FIG. 13 and FIG. 14 , the width of the second fixing groove 122 is larger than the width of the first fixing groove 121 , and the outer side wall of the second outer sleeve portion 42 is in contact with the second fixing groove. There is a first gap between the inner sidewalls of 122 to provide a certain deformation space for the second outer casing part 42 , the first deformation part 22 and the second deformation part 32 .

15-17 show the structural schematic diagrams of the driving mechanism of the second embodiment of the present invention. The first difference between the second embodiment and the first embodiment is that in the second embodiment, the second grooves are provided on both sides of the first embedding groove 421 and the second embedding groove 422 423 , and the left and right sides of the second jacket part 42 are respectively provided with third grooves. However, in the first embodiment, the third groove is not provided on the left and right sides of the second sheath portion 42, so the second sheath portion in the second embodiment is compared with the second sheath portion of the first embodiment. have better deformability. In the second embodiment, the ends of the plurality of third grooves 424 are independent free ends, the third grooves 424 have a fifth width near the axis, and a sixth width away from the axis. , the fifth width is greater than the sixth width. The end of the third groove 424 is the end away from the axis, that is, the direction of the first groove 222 of the deformation part is the same.

The second difference between the second embodiment and the first embodiment is that: in the second embodiment, the first limiting portion 23 includes a first connecting portion 233 and a first reinforcing portion 232, and the first connecting portion The part 233 is connected between the first reinforcing part 232 and the first deforming part 22, the lateral width of the first reinforcing part 232 is larger than the lateral width of the first connecting part 233, by enlarging the first The lateral width of a reinforcement part 232 can improve the structural strength of the first reinforcement part 232 and the cooperation between the first reinforcement part 232 and the nail box shell 1, and promote the first limiting part 23 to the Describe the limiting effect of the deformation of firing rod 8. Likewise, the second limiting portion 33 includes a second connecting portion 333 and a second reinforcing portion 332 , the second connecting portion 333 is connected between the second reinforcing portion 332 and the second deforming portion 32 , The lateral width of the second reinforcing portion 332 is greater than the lateral width of the second connecting portion 333, by increasing the lateral width of the second reinforcing portion 332, the structural strength of the second reinforcing portion 332 and the resulting The second reinforcing part 332 cooperates with the nail magazine shell 1 and enhances the limiting effect of the second limiting part 33 on the deformation of the firing rod 8 .

As shown in FIG. 18 and FIG. 19 , it is a schematic structural diagram of a connecting piece according to a third embodiment of the present invention. The difference between this embodiment and the first embodiment is that the first limiting portion 23 of the first inner connecting member 2 and the second limiting portion 33 of the second inner connecting member 3 are not provided with the first stop The hole and the second limiting hole are respectively provided with a second limiting groove 234 and a third limiting groove 334 extending in the axial direction. The limiting pin 52 enters into the second limiting groove 234 and the third limiting groove 334 at the same time, and can move along the extension direction of the second limiting groove 234 and the third limiting groove 334 . The lengths of the second limiting slot 234 and the third limiting slot 334 may be shorter than the length of the first limiting slot 431 . Compared with the structure of the connecting piece of the first embodiment, when the nail head swings, the third outer sleeve portion 43 , the first limiting portion 23 and the second limiting portion 33 There is greater freedom of relative movement between them, which can improve the smoothness of the swing operation of the nail head.

In the third embodiment, the limiting pin 52 is a pin with a waist-shaped cross section, and the long axis of the limiting pin 52 is parallel to the axial direction. In other alternative implementations, the limiting pin 52 may also be a pin with a cross-section of a circle, an ellipse, a rectangle with rounded corners, or the like. In this embodiment, the cross-sections of the first limiting groove 431, the second limiting groove 234, and the third limiting groove 334 are waist-shaped, and the long axis of the waist shape is parallel to the axial direction. . The size and shape of the second limiting groove 234 and the third limiting groove 334 are the same, the first limiting groove 431 has a first axial length, and the second limiting groove 234 and the first limiting groove 431 have the same length. The three limiting slots 334 have a second axial length, and the first axial length is greater than the second axial length. In other alternative implementations, the lengths of the second limiting slot 234 and the third limiting slot 334 may also be equal to the length of the first limiting slot 431 . Or the lengths of the second limiting slot 234 and the third limiting slot 334 may be different. In the third embodiment, the structures of other components are basically the same as those in the first embodiment, and will not be repeated here.

In the first embodiment, the second embodiment and the third embodiment, the inner connecting parts each include a first inner connecting part and a second inner connecting part. The first inner connecting part and the second inner connecting part may be made of the same material, and the inner connecting part and the outer connecting part may be made of the same or different materials. In other alternative implementations, the inner connecting part may only include one first inner connecting part, that is, the fixing part only includes the first fixing part, the deforming part only includes the first deforming part, and the limiting part Only the first limited part is included. The structure of the limiting portion may be the same as the structure of the first limiting portion shown in the first embodiment, or the structure of the first limiting portion shown in the second embodiment. The inner connector and the outer connector are at least partially deformable materials, for example, the inner connector and/or the outer connector can be made of medical plastic polyvinyl chloride (PVC), polyethylene (PE) , Polypropylene (PP), etc.

In the first embodiment, the second embodiment and the third embodiment, between the outer connecting member and the inner connecting member, or between the first inner connecting member, the second inner connecting member and the A lubricating structure is provided between the outer connecting parts, and the lubricating structure can be lubricant, lubricating oil, or a lubricating process, adding a lubricating coating, etc. to reduce friction and increase the smoothness of relative movement.

The above content is a further detailed description of the present invention in conjunction with specific preferred embodiments, and it cannot be assumed that the specific implementation of the present invention is limited to these descriptions. For those of ordinary skill in the technical field of the present invention, without departing from the concept of the present invention, some simple deduction or replacement can be made, which should be regarded as belonging to the protection scope of the present invention.

Claims (26)

1. A driving mechanism for a medical stapler, the medical stapler comprising a stapler body and a nail head part positioned at the distal end side of the stapler body; the driving mechanism includes:

the nail box shell is connected between the nail head and the anastomat body;

the firing bar is at least partially positioned in the nail box shell and extends into the nail head part along the axial direction of the anastomat body;

the inner connecting piece comprises a fixing part, a deformation part and a limiting part which are sequentially arranged from the far end side to the near end side;

the outer connecting piece comprises a first outer sleeve part, a second outer sleeve part and a third outer sleeve part which are respectively sleeved outside the fixing part, the deformation part and the limiting part;

the fixing part and the first outer sleeve part are fixedly connected to the proximal end side of the nail head part, and the limiting part and the third outer sleeve part are fixedly connected to the distal end side of the nail box shell;

The inner connecting piece and the outer connecting piece jointly define a first channel extending in the axial direction, the firing rod penetrates through the first channel, when the nail head swings relative to the axial direction of the anastomat body, the firing rod swings along with the nail head, and the deformation part and the second outer sleeve part deform at least partially along with the swing of the nail head.

2. The drive mechanism of claim 1, wherein the deformed portion and the first side of the second sleeve portion are at least partially deformed in compression and the deformed portion and the second side of the second sleeve portion are at least partially deformed in tension when the head portion swings to the first side in the axial direction relative to the stapler body;

when the nail head part swings towards a second side relative to the axial direction of the anastomat body, the deformation part and the first side of the second outer sleeve part are at least partially subjected to tensile deformation, and the deformation part and the second side of the second outer sleeve part are at least partially subjected to compression deformation.

3. The drive mechanism of claim 1, wherein the nail head includes a cartridge housing, a distal end side of the fixing portion is provided with a pin hole, the pin hole is exposed outside the first outer sleeve portion, and the fixing portion and the cartridge housing are connected by a connecting pin at least partially entering the pin hole.

4. The drive mechanism of claim 3, wherein the proximal side of the cartridge housing is provided with a retaining sleeve, the retaining portion at least partially entering the interior of the retaining sleeve.

5. The drive mechanism of claim 1, wherein the fixed portion of the inner link and the first outer sleeve portion of the outer link are connected by at least one fixed pin.

6. The drive mechanism of claim 5, further comprising an axially extending swing link, one of the retaining pins passing through the retaining portion, the first outer sleeve portion and a distal side of the swing link simultaneously.

7. The drive mechanism of claim 6, wherein a second channel is formed in one side of the outer connector, a third channel is formed in a position of the inner connector opposite to the second channel, and the swing rod is disposed through the second channel and the third channel.

8. The driving mechanism according to claim 7, wherein a position of the second passage corresponding to the distal end side of the swing rod is provided with a relief groove recessed toward the outside, a fixing hole is provided at the relief groove, and one fixing pin passes through the fixing hole and the distal end side of the swing rod at the same time.

9. The drive mechanism of claim 5, wherein the inner connector comprises a first inner connector and a second inner connector, the first inner connector being located on a side of the second inner connector remote from the bottom surface of the staple head, the first inner connector comprising a first securing portion, a first deforming portion, and a first defining portion, the second inner connector comprising a second securing portion, a second deforming portion, and a second defining portion;

the first fixing part, the second fixing part and the first outer sleeve part are fixedly connected to the proximal end side of the nail head part through the fixing pin.

10. The drive mechanism of claim 9, wherein the defining portion of the inner connector and the third outer sleeve portion of the outer connector are connected to the distal side of the magazine housing by at least one stop pin.

11. The drive mechanism of claim 1, wherein a cutter is provided on a proximal side of the staple head portion, a cutter groove is provided on a distal side of the fixing portion, the cutter groove is in communication with the first channel, and in an initial state, the cutter portion enters the cutter groove.

12. The drive mechanism of claim 1, wherein the deformation portion is provided with a plurality of first grooves, and the second outer sleeve portion is provided with a plurality of second grooves.

13. The drive mechanism of claim 12, wherein the first grooves are circular arc grooves which diverge outwardly from a central axis of the deformation portion, or the first grooves extend in a transverse direction, and the ends of the plurality of first grooves are independent free ends, respectively, the first grooves have a first width near an axis and a second width far from the axis, and the first width is greater than the second width;

the second grooves are arc grooves which are outwards dispersed from the central axis of the second outer sleeve part, or extend along the transverse direction, the tail ends of the second grooves are independent free ends respectively, the second grooves are of a third width at the position close to the axis and of a fourth width at the position far from the axis, and the fourth width is larger than the third width;

the ends of the first plurality of grooves are oriented opposite to the ends of the second plurality of grooves.

14. The driving mechanism according to claim 12, wherein an upper side surface and/or a lower side surface of the second outer jacket portion is provided with an axially extending insertion groove, the deformation portion is provided with an insertion portion which is inserted into the insertion groove, and a shape of the insertion portion is adapted to a shape of the insertion groove; or,

The upper side and/or the lower side of the deformation part is/are provided with an axially extending embedded groove, the second outer sleeve part is provided with an embedded part embedded in the embedded groove, and the shape of the embedded part is adapted to the shape of the embedded groove.

15. The drive mechanism according to claim 14, wherein the second grooves are provided on both side surfaces of the insertion groove, and third grooves are provided on left and right side surfaces of the second housing portion;

the tail ends of the third grooves are independent free ends respectively, the third grooves are of a fifth width near the axis, the third grooves are of a sixth width far from the axis, and the fifth width is larger than the sixth width.

16. The drive mechanism of claim 1, wherein the firing bar oscillates with the staple head when the staple head oscillates in an axial direction relative to the stapler body, the defined portion does not deform, or the amount of deformation of the defined portion is less than the amount of deformation of the deformed portion.

17. The drive mechanism of claim 10, wherein the first inner connector is provided with a first limiting aperture and the second inner connector is provided with a second limiting aperture, and the limiting pin is fixedly connected to the first limiting aperture and the second limiting aperture.

18. The drive mechanism of claim 17, wherein the third outer sleeve portion of the outer connector is provided with an axially extending first limit slot, and the limit pin is located in the first limit slot and is axially movable.

19. The driving mechanism as recited in claim 10 wherein said first inner connecting member is provided with a second spacing groove, said second inner connecting member is provided with a third spacing groove, said spacing pin is movably connected to said second spacing groove and said third spacing groove, said third outer sleeve portion of said outer connecting member is provided with a first spacing groove extending in an axial direction, and said spacing pin is movably disposed in said first spacing groove, said second spacing groove and said third spacing groove.

20. The drive mechanism of claim 19, wherein the stop pin is kidney-shaped in cross section and a long axis of the kidney-shape is parallel to the axial direction;

the cross sections of the first limit groove, the second limit groove and the third limit groove are waist-shaped, and the long axis of the waist-shaped is parallel to the axial direction;

the second limiting groove and the third limiting groove are the same in size and shape, the first limiting groove is provided with a first axial length, the second limiting groove and the third limiting groove are provided with a second axial length, and the first axial length is larger than the second axial length.

21. The driving mechanism as claimed in claim 10, wherein a fixing groove is provided on an inner side of the magazine housing, the defining portion and the third outer sleeve portion being embedded in the fixing groove;

the bottom of the fixing groove of the nail box shell is provided with a nail box hole, and the limiting pin at least partially enters the nail box hole.

22. The drive mechanism of claim 21, wherein the fixed slot comprises a first fixed slot and a second fixed slot, the defining portion and the third outer sleeve portion enter the first fixed slot, the deforming portion and the second outer sleeve portion enter the second fixed slot at least partially, a width of the second fixed slot is greater than a width of the first fixed slot, and a first gap is provided between an outer sidewall of the second outer sleeve portion and an inner sidewall of the second fixed slot.

23. The drive mechanism of claim 1, wherein the defining portion includes a connecting portion and a reinforcing portion, the connecting portion being connected between the reinforcing portion and the deforming portion, the reinforcing portion having a lateral width greater than a lateral width of the connecting portion.

24. A drive mechanism according to claim 1, wherein a lubrication is provided between the inner and/or outer links.

25. The drive mechanism of claim 1, wherein the inner and/or outer links are of different materials.

26. A medical stapler comprising the drive mechanism of any one of claims 1 to 25.

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