CN109480937B - Nail bin assembly and anastomat - Google Patents
Nail bin assembly and anastomat Download PDFInfo
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- CN109480937B CN109480937B CN201811405591.5A CN201811405591A CN109480937B CN 109480937 B CN109480937 B CN 109480937B CN 201811405591 A CN201811405591 A CN 201811405591A CN 109480937 B CN109480937 B CN 109480937B
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- working head
- main body
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/068—Surgical staplers, e.g. containing multiple staples or clamps
- A61B17/072—Surgical staplers, e.g. containing multiple staples or clamps for applying a row of staples in a single action, e.g. the staples being applied simultaneously
- A61B17/07207—Surgical staplers, e.g. containing multiple staples or clamps for applying a row of staples in a single action, e.g. the staples being applied simultaneously the staples being applied sequentially
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/068—Surgical staplers, e.g. containing multiple staples or clamps
- A61B17/072—Surgical staplers, e.g. containing multiple staples or clamps for applying a row of staples in a single action, e.g. the staples being applied simultaneously
- A61B2017/07214—Stapler heads
- A61B2017/07271—Stapler heads characterised by its cartridge
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- Life Sciences & Earth Sciences (AREA)
- Surgery (AREA)
- Heart & Thoracic Surgery (AREA)
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- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
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- Molecular Biology (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Portable Nailing Machines And Staplers (AREA)
- Surgical Instruments (AREA)
Abstract
The invention relates to a nail bin assembly and a stapler. A staple cartridge assembly comprising: the working head is hinged with the main body through the connecting component, and the driving mechanism is used for driving the working head to swing relative to the main body; the coupling assembly includes: the first sector gear is fixedly connected with the working head; the second sector gear is fixedly connected with the main body and meshed with the first sector gear; a connecting member; the drive mechanism includes: a first drive rod axially movable along the housing; a first link; the first connecting rod rotates around a third axis relative to the working head; the second driving rod can move along the axial direction of the shell, and the moving directions of the second driving rod and the first driving rod are opposite; a second link. Above-mentioned nail storehouse subassembly, coupling assembling and actuating mechanism combined action for medical staff need not increase operating force when operating nail storehouse subassembly and can obtain bigger pivot angle, and can more effectively alleviate nail storehouse subassembly local stress concentration's phenomenon simultaneously.
Description
Technical Field
The invention relates to the field of medical instruments, in particular to a nail bin assembly and an anastomat.
Background
Currently, minimally invasive surgery occupies an important position in surgical operations. Staplers are common surgical instruments used in minimally invasive surgery. The anastomat has the working principle that the anastomat is clamped at a focus part through the nail bin assembly to perform excision, and the focus is sutured while the excision is performed.
Generally, a stapler includes a cartridge assembly, an adapter, and a handle, wherein the cartridge assembly is removably mounted to the adapter. Specifically, the nail cartridge assembly comprises a main body and a working head hinged with the far end of the main body through a connecting assembly. The working head is the part of the anastomat for implementing excision and suture. The connecting component can enable an operator to remotely operate the working head to swing clockwise or anticlockwise relative to the nail bin main body.
However, the traditional anastomat has the advantages that the swing angle of the working head relative to the main body is small due to operation, and the use requirement of a doctor is difficult to meet; when the operation is carried out, the swing angle of the working head relative to the main body is larger, a doctor needs to provide larger operation force, and the nail bin assembly has a phenomenon of local stress concentration due to the larger operation force.
Disclosure of Invention
Therefore, a nail bin assembly which can enable the working head to obtain a larger swing angle without increasing operation force and can effectively relieve the local stress concentration phenomenon of the nail bin assembly is needed to be provided.
A staple cartridge assembly comprising: the working head is hinged with the main body through the connecting component, and the driving mechanism is used for driving the working head to swing relative to the main body;
the coupling assembly includes:
the first sector gear is fixedly connected with the working head, and the axis of the first sector gear is a first axis;
the second sector gear is fixedly connected with the main body, the second sector gear is meshed with the first sector gear, and the axis of the second sector gear is a second axis;
one end of the connecting piece can be connected to the working head in a rotating mode around the first axis, and the other end of the connecting piece can be connected to the main body in a rotating mode around the second axis;
the drive mechanism includes:
a first driving rod movable in an axial direction of the main body;
one end of the first connecting rod is rotatably connected with the first driving rod, and the other end of the first connecting rod is rotatably connected with the working head; the first connecting rod rotates around a third axis relative to the working head;
the second driving rod can move along the axial direction of the main body, and the moving directions of the second driving rod and the first driving rod are opposite;
one end of the second connecting rod is rotatably connected with the second driving rod, the other end of the second connecting rod is rotatably connected with the working head, the second connecting rod rotates around a fourth axis relative to the working head, and the fourth axis, the third axis and the first axis are not collinear.
According to the nail bin assembly, the driving mechanism drives the working head to rotate for a certain angle around the first axis, and meanwhile, the working head deflects for the same angle relative to the main body. Due to the mutual meshing of the first sector gear and the second sector gear, the working head can rotate around the second axis at the same angle, so that the working head can deflect at the same angle relative to the main body again. Namely, under the condition of not increasing the operation stress, the final deflection angle of the working head relative to the main body is doubled, namely, the working head obtains a larger swing angle. In addition, the first connecting rod and the second connecting rod act together to drive the working head to swing relative to the main body, so that the force of the working head on the single connecting rod is reduced. In addition, the third axis and the fourth axis are not collinear, so that the stress of the first connecting rod and the stress of the second connecting rod, which are respectively applied to the working head, are distributed in a dispersing way, and the phenomenon of local stress concentration of the working head is relieved.
In one embodiment, the coupling assembly further comprises a hinge connected to the body and rotatable about the second axis, and a cartridge mount fixedly connected to the proximal end of the working head.
In one embodiment, the hinge has a first recessed area and the cartridge seat has a first raised area that is a clearance fit with the first recessed area.
In one embodiment, the connecting member is fixedly connected to the hinge.
In one embodiment, the coupling assembly comprises two of the first sector gears and two of the second sector gears, the two first sector gears being in mesh with the two second sector gears, respectively.
In one embodiment, the coupling assembly comprises two connecting pieces, and the two connecting pieces are symmetrically arranged on two sides of the main body.
In one embodiment, the third axis and the fourth axis are symmetrical about the axis of the working head, the first connecting rod and the second connecting rod have the same length, and the first driving rod and the second driving rod have the same distance from the axis of the main body.
In one embodiment, the drive mechanism further comprises a linkage assembly; when the first driving rod moves towards the far end direction of the main body, the first driving rod drives the second driving rod to synchronously move in the reverse direction through the linkage assembly and/or when the first driving rod moves towards the near end direction of the main body, the first driving rod drives the second driving rod to synchronously move in the reverse direction through the linkage assembly.
In one embodiment, the main body comprises a shell, and the linkage assembly comprises a pulley and a tensioning rope which are fixedly arranged on the shell; tensioning rope one end with first actuating lever fixed connection, the other end is walked around the pulley and with second actuating lever fixed connection.
In one embodiment, the linkage assembly includes a first rack fixedly connected to the first driving rod, a second rack fixedly connected to the second driving rod, and a gear disposed between the first rack and the second rack, and the gear is engaged with both the first rack and the second rack.
In one embodiment, the linkage assembly further comprises a first linkage member fixedly connected to the first drive rod and a second linkage member fixedly connected to the second drive rod; the first rack is fixedly arranged on the first linkage piece, and the second rack is fixedly arranged on the second linkage piece.
In one embodiment, the first rack is integrally formed with the first linkage, and/or the second rack is integrally formed with the second linkage.
The invention also provides the anastomat.
A stapler comprises the nail cartridge component provided by the invention.
The anastomat comprises the nail bin assembly provided by the invention, and the driving mechanism drives the working head to rotate for a certain angle around the first axis, and meanwhile, the working head deflects for the same angle relative to the main body. Due to the mutual meshing of the first sector gear and the second sector gear, the working head can rotate around the second axis at the same angle, so that the working head can deflect at the same angle relative to the main body again. Namely, under the condition of not increasing the operation stress, the final deflection angle of the working head relative to the main body is doubled, namely, the working head obtains a larger swing angle. In addition, the first connecting rod and the second connecting rod act together to drive the working head to swing relative to the main body, so that the stress of the working head on the single connecting rod is reduced. In addition, the third axis and the fourth axis are not collinear, so that the stress of the first connecting rod and the stress of the second connecting rod, which are respectively applied to the working head, are distributed in a dispersing way, and the phenomenon of local stress concentration of the working head is relieved.
Drawings
FIG. 1 is a schematic structural view of a staple cartridge assembly according to an embodiment of the present invention.
FIG. 2 is an enlarged partial view of A of the cartridge assembly of FIG. 1.
FIG. 3 is a schematic view of the staple cartridge assembly of FIG. 1 with the attachment elements removed.
FIG. 4 is an exploded view of the cartridge assembly of FIG. 1.
FIG. 5 is a schematic view of the first sector gear and the cartridge receptacle of FIG. 1.
Fig. 6 is a schematic structural view of the hinge of fig. 1.
FIG. 7 is a schematic view of the FIG. 1 head after deflection relative to the main body.
FIG. 8 is a structural schematic view in another orientation of the staple cartridge assembly of FIG. 1.
FIG. 9 is a cross-sectional view taken along line M-M of the staple cartridge assembly shown in FIG. 8.
FIG. 10 is a schematic cross-sectional view taken along the direction M-M of the working head of the staple cartridge assembly of FIG. 8 after the working head has been deflected at a certain angle relative to the main body.
FIG. 11 is a partial schematic structural view of the staple cartridge assembly of FIG. 1.
FIG. 12 is a schematic view of a portion of a staple cartridge assembly according to another embodiment of the present invention.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein.
It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
As shown in fig. 1 to 11, a cartridge assembly 100 according to an embodiment of the present invention includes a main body 110, a working head 130, a coupling assembly and a driving mechanism 170. The working head 130 is hinged to the main body 110 through a coupling assembly, and the driving mechanism 170 is used for driving the working head 130 to swing relative to the main body 110.
As shown in fig. 3 and 5, in particular, the coupling assembly includes a first sector gear 151 fixedly connected with the working head 130, a second sector gear 153 fixedly connected with the main body 110, and a connection member 155. The axis of the first sector gear 151 is a first axis a. The second sector gear 153 is engaged with the first sector gear 151, and an axis of the second sector gear 153 is a second axis b. The connecting member 155 has one end rotatably connected to the working head 130 about a first axis a and the other end rotatably connected to the main body 110 about a second axis b.
The coupling assembly includes a first sector gear 151 and a second sector gear 153 that intermesh. The driving mechanism 170 drives the working head 130 to rotate around the first axis a by a certain angle, and simultaneously, the working head 130 deflects by the same angle relative to the main body 110. In addition, due to the mutual engagement of the first sector gear 151 and the second sector gear 153, the working head 130 simultaneously rotates around the second axis b by the same angle, so that the working head 130 deflects by the same angle with respect to the main body 110. I.e. the angle by which the working head 130 is finally deflected with respect to the main body 110 is doubled without increasing the operating stress, i.e. a larger swing angle of the working head 130 is obtained.
Likewise, it can be appreciated that the cartridge assembly 100 provided by the present embodiment requires less operating stress in the case of deflecting the body 110 at the same angle as the working head 130.
In addition, compared to the conventional working head rotating only around the first axis, in the present embodiment, the working head 130 and the main body 110 are hinged by the coupling assembly, i.e., the working head 130 rotates around the first axis a and also revolves around the second axis b, thereby increasing the turning radius between the working head 130 and the main body 110. Compared with the conventional working head only rotating around the first axis, in the embodiment, when the working head 130 deflects at the same angle relative to the main body 110, the bending stress applied to the working head 130 and the main body 110 is smaller, so that the working head 130 is easier to deflect, i.e., the operating stress required by the working head 130 when deflecting is smaller.
Referring to fig. 4, 9-12, the drive mechanism includes a first drive rod 171 axially movable along the body 110, a first link 173, a second drive rod 175 axially movable along the body 110, and a second link 177. Wherein the second driving lever 175 and the first driving lever 171 move in opposite directions. The first link 173 has one end rotatably connected to the first driving lever 171 and the other end rotatably connected to the working head 130. One end of the second link 177 is rotatably connected to the second driving rod 175, and the other end is rotatably connected to the working head 130. Specifically, the first link 173 rotates about the third axis c relative to the working head 130, and the second link 177 rotates about the fourth axis d relative to the working head, the fourth axis d, the third axis c and the first axis a being non-collinear.
The first link 173 and the second link 177 work together to drive the working head 130 to swing relative to the main body 110, so that the stress on the working head 130 from a single link is reduced. In other words, compared to the conventional driving mechanism with only one link, in the embodiment, when the working head 130 swings at the same angle, the stress applied to the working head 130 by the first link 173 and the second link 177 is smaller. In addition, the third axis c and the fourth axis d are not collinear, so that the stresses of the first connecting rod 173 and the second connecting rod 177, which are respectively applied to the working head 130, are distributed, and the phenomenon of local stress concentration of the working head 130 is further alleviated.
In addition, the first drive rod 171 and the second drive rod 173 move in opposite directions, so that the first connecting rod 173 and the second connecting rod 175 act on the working head 130 by one of the pulling force and the pushing force, so that the rotation direction of the working head 130 is more definite. And a pulling force and a pushing force act together to make the rotation of the working head 130 smoother.
The connecting component and the driving mechanism act together, so that when medical personnel operate the nail bin component, a larger swing angle can be obtained without increasing operation force, and meanwhile, the phenomenon of local stress concentration of the nail bin component can be effectively relieved.
In this embodiment, the coupling assembly further comprises a hinge 157 connected to the body 110 and rotatable about a second axis b, and a cartridge mount 159 fixedly connected to the proximal end of the working head 130. The provision of hinge 157 and cartridge mount 159 may enhance the strength of the coupling assembly.
Further, hinge 157 has a first recessed area 1571 and cartridge seat 159 has a first raised area 1591 that mates with first recessed area 1571 to maximize the physical mass of hinge 157 and cartridge seat 159, thereby increasing the strength of hinge 157 and cartridge seat 159, further increasing the strength of the coupling assembly.
Of course, in alternative embodiments, the hinge may be provided with a raised area and the cartridge seat may be provided with a matching recessed area to provide the same effect.
In this embodiment, the hinge 157 has a second protruding region 1573, and the body 110 has a second recessed region 111 matching with the second protruding region 1573, so as to maximize the physical strength of the hinge 157 and the body 110, thereby increasing the strength of the hinge 157 and the body 110. In addition, the hinge 157 is connected to the main body 110 to rotate around the second axis b, so that the hinge 157 is necessarily in clearance fit with the main body 110. The provision of the second raised area 1573 and the second recessed area 111 also minimizes the gap between the hinge 157 and the body 110.
In this embodiment, the first sector gear 151 is integrally formed with the cartridge seat 159, thereby making the assembly of the coupling assembly with the working head 130 simpler.
In this embodiment, the coupling assembly includes two first sector gears 151 and two second sector gears 153, and the two first sector gears 151 are respectively engaged with the two second sector gears 153, so that the working head 130 can be more accurately rotated around the second axis b, the wear of the first sector gears 151 and the second sector gears 153 can be reduced, and the service lives of the first sector gears 151 and the second sector gears 153 can be prolonged.
In addition, the two first sector gears 151 and the second sector gear 153 are further arranged to better prevent the working head 130 from twisting relative to the main body 110.
Further, in the present embodiment, the two first sector gears 151 are symmetrically disposed with respect to the axis of the working head 130. Thereby equalizing the stress between the two first sector gears 151 and the second sector gears 153, respectively.
In this embodiment, the connecting member 155 is fixedly connected to the hinge 157. The working head 130 rotates around the second axis b to drive the connecting member 155 to rotate around the second axis b, and the connecting member 155 drives the hinge 157 to rotate around the second axis b, so that the relative positions of the hinge 157 and the nail bin seat 159 are effectively ensured.
Further, in the present embodiment, the coupling assembly includes two connection members 155, and the two connection members 155 are symmetrically disposed at both sides of the main body 110. The two connecting pieces 155 are arranged, so that the stress on two sides of the joint of the working head 130 and the main body 110 is uniform, and the phenomenon of single-side stress concentration is avoided.
Two connecting members 155 are symmetrically provided on both sides of the body 110, and it is apparent that the connecting members 155 are also provided on both sides of the hinge 157. In this embodiment, connecting piece 155 and hinge 157 fixed connection, the setting of two connecting pieces 155 for connecting piece 155 is more smooth and easy when driving hinge 157 rotation, avoids appearing the condition of hinge 157 unilateral atress, thereby also effectively avoids hinge 157 to take place the distortion.
In addition, in this embodiment, the coupling assembly further includes an elastic member 152 having one end fixedly connected to the working head and the other end fixedly connected to the main body. The elastic member 152 may be provided to make the bending between the working head 130 and the main body 110 smoother. In addition, the elastic member 152 can bear the stress between the working head 130 and the main body 110, and can relieve the stress on the connecting member 155, the hinge 157 and the magazine base 159, so that the deflection of the working head 130 relative to the main body 110 is smoother.
In the present embodiment, the third axis c and the fourth axis d are symmetrical with respect to the axis of the working head 130. Therefore, the force applied to the working head 130 by the first connecting rod 173 and the second connecting rod 177 is symmetrically distributed on the working head 130, and the stress on the working head 130 is more uniform.
Further, in the present embodiment, the first link 173 and the second link 177 have the same length, and the first drive lever 171 and the second drive lever 175 are symmetrically disposed with respect to the axis of the main body 110. Therefore, when the working head 130 swings at a certain angle, the displacement amounts of the first driving rod 171 and the second driving rod 175 are the same, and the movement of the first driving rod 171 and the second driving rod 175 is controlled conveniently. Specifically, the first driving rod 171 and the second driving rod 175 may be controlled to move at the same speed and in opposite directions.
In this embodiment, the driving mechanism further comprises a linkage assembly; when the first driving rod 171 moves in the distal direction of the main body 110, the first driving rod 171 drives the second driving rod 175 to move synchronously but reversely through the linkage assembly. The linkage assembly is provided to more accurately set the speeds of the first drive rod 173 and the second drive rod 175 to be the same.
It will be appreciated that the distal end of body 110 refers to the end of body 110 that is proximal to working head 130, i.e., the end of body 110 that is distal to the surgeon when using cartridge assembly 100.
More specifically, in the present embodiment, the main body 110 includes a housing 112, and the linkage assembly includes a pulley 1791 and a tension rope 1793 fixedly disposed on the housing 112. One end of the tension rope 1793 is fixedly connected to the first driving rod 171, and the other end thereof passes around the pulley 1791 and is fixedly connected to the second driving rod 175.
In this embodiment, the main body 110 further includes a main component 115, and the main component 115 is fixed to the housing 112. The pulley 1791 may be fixed directly to the housing 112 or may be fixed to the main structure 115 so as to be fixed to the housing 112.
The pulley 1791 can change the direction of the tension rope 1793, and the tension ropes on both sides of the pulley 1791 are increased or decreased by the same length, and the present embodiment utilizes the principle to realize the same movement rate and opposite movement directions of the first driving rod 171 and the second driving rod 175.
Further, in the present embodiment, the linkage assembly further includes a first linkage 1795 fixedly connected to the first driving rod 171 and a second linkage 1797 fixedly connected to the second driving rod 175. The tension cord 1793 is fixedly connected at each end to the first and second linkages 1795, 1797. That is, the tension cord 1793 is fixedly connected to the first and second drive rods 171 and 175 via the first and second linkages 1795 and 1797, respectively.
The first linkage 1795 and the second linkage 1797 are arranged to prevent the tension rope 1793 from being directly fixedly connected with the first driving rod 171 and the second driving rod 175, so that the two ends of the tension rope 1793 are respectively identical to the first driving rod 171 and the second driving rod 175 in the movement direction, and the phenomenon that the tension rope 1793 obliquely pulls the first driving rod 171 and the second driving rod 175 can be avoided.
In this embodiment, the linkage assembly includes two tension ropes 1793 and two pulleys 1791, and the two tension ropes 1793 pass around the two pulleys 1791 respectively. That is, the two tension ropes 1793 are used to link the first driving rod 171 and the second driving rod 175, so that each tension rope 1793 bears a smaller force, thereby prolonging the service life of the tension rope 1793.
Further, in the present embodiment, the two tensioning ropes 1793 are symmetrically disposed on two sides of the central axis of the main body 110. On the one hand, the forces on the two tensioning cords 1793 are substantially the same. On the other hand, make first actuating lever 171 and second actuating lever 175 both sides atress to avoid first actuating lever 171 and second actuating lever 175 because of with tensioning rope 1793 fixed connection and the unilateral atress's the condition appears, and then avoid first actuating lever 171 and second actuating lever 175 phenomenon that the distortion appears under the effect of tensioning rope 1793.
Further, in the present embodiment, the sheave diameter of the pulley 1791 is equal to the distance between both ends of the tension rope 1793 in the direction perpendicular to the axial direction of the housing 112. It can be understood that the portion of the tension rope 1793 not abutting against the pulley 1791 is tangent to the pulley 1791, the distance between the two ends of the tension rope 1793 in the direction perpendicular to the axial direction of the housing 112 is equal to the diameter of the groove of the pulley 1791, so that the portion of the tension rope 1793 not abutting against the pulley 1791 is parallel to the axis of the housing 112, the force between the two ends of the tension rope 1793 and the first and second linkages 1795 and 1797 respectively is along the axial direction of the housing 112, thereby effectively avoiding the first and second driving rods 171 and 175 from being deformed perpendicular to the axial direction of the housing 112 due to the pulling of the tension rope 1793, more effectively ensuring the tensioned state of the tension rope 1793, and further more effectively ensuring the same moving speed of the first and second driving rods 171 and 175. It will be appreciated that the housing 112 is axial, i.e., the body 110.
Of course, in another embodiment, it is also possible to avoid the force acting on the first driving rod 171 and the second driving rod 175 in the direction perpendicular to the axis of the housing 112 by arranging more than one pulley 1791 appropriately so that the portions of the tension rope 1793 near both ends thereof are parallel to the axis of the housing 112.
Optionally, the tensioning rope 1793 is a steel rope. The wire is bendable and is not easily elongated, and the linkage of the first driving lever 171 and the second driving lever 175 can be controlled more accurately. Of course, it is understood that the tensioning cord 1793 is not limited to a steel cord, and other cords made of materials that are flexible and not easily elongated may be selected.
In this embodiment, the operator can directly drive the first driving rod 171 only to move in the distal direction or the proximal direction of the main body 110. When the first driving rod 171 moves toward the distal end of the main body 110, the first driving rod drives the second driving rod 175 to synchronously move in the opposite direction through the linkage assembly. The linkage assembly is not effective when the first drive rod 171 is moved in the proximal direction of the body 110. At this time, the first driving rod 171 drives the second driving rod 175 to synchronously move in the opposite direction sequentially through the first connecting rod 173, the working head 130 and the second connecting rod 177.
It should be noted that, in another embodiment, the structure of the linkage assembly may be reasonably arranged, so that the second driving rod can be driven by the linkage assembly to synchronously move in the opposite direction no matter the first driving rod moves towards the far end direction of the main body or towards the near end direction of the main body. For example, in one possible embodiment, the tension cord may also be fixedly connected to the first drive rod, routed over a pulley, fixedly connected to the second drive rod, routed over the first pulley, and finally fixedly connected to the first drive rod. I.e. the tension cord is closed loop.
In this embodiment, the operator can directly drive only the first driving lever 171. Thus, the length of the second driving rod 175 can be set shorter, which saves materials and space and saves cost. It should be noted that, in another embodiment, the length of the second driving rod may be increased, so that the operator may directly drive the second driving rod, and when the second driving rod moves towards the distal end or the proximal end of the main body, the first driving rod may also be driven by the linkage assembly to move synchronously but reversely.
Referring to FIG. 12, another embodiment of the present invention provides a cartridge assembly 200, which is different from the cartridge assembly 100 in that the structure of the linkage assembly for driving the first driving rod 271 and the second driving rod 275 is different. Specifically, in the present embodiment, the linkage assembly includes a first rack 2792 fixedly connected to the first driving rod 271, a second rack 2794 fixedly connected to the second driving rod 275, and a gear 2796 disposed between the first rack 2792 and the second rack 2794, and the gear 2796 is engaged with both the first rack 2792 and the second rack 2794.
The external engagement of gears 2796 may reverse the motion, but not change the rate of motion. In the present embodiment, the principle is utilized, so that the first rack 2792 and the second rack 2794 move in the same direction, and the moving speeds of the first rack 2792 and the second rack 2794 are the same.
Specifically, in this embodiment, the linkage assembly includes two first racks 2792, two second racks 2794, and two gears 2796. Each first rack 2792 is disposed corresponding to a second rack 2794, and a gear 2796 is disposed between each pair of the corresponding first rack 2792 and second rack 2794. It is appreciated that in other embodiments, more than one sequentially meshing gear 2796 may be provided between each pair of correspondingly disposed first and second racks 2792, 2794.
In this embodiment, the linkage assembly further includes a first linkage 2795 fixedly connected to the first drive rod 271 and a second linkage 2797 fixedly connected to the second drive rod 275. The first rack 2792 is fixedly disposed on the first linkage member 2795, and the second rack 2794 is fixedly disposed on the second linkage member 2797. The first and second linkage members 2795 and 2797 are provided for the same purpose as the first and second linkage members 1795 and 1797, and will not be described herein.
Alternatively, in this embodiment, the first rack 2792 is integrally formed with the first linkage 2795, and the second rack 2794 is integrally formed with the second linkage 2797.
Of course, in other embodiments, the specific structure of the driving structure is not limited to this, and the working head may be driven to swing relative to the main body by other manners. For example, the driving mechanism only comprises one driving rod and one connecting rod, namely the working head is driven to swing relative to the main body through the single-crank structure.
The invention also provides a stapler which comprises the nail bin assembly provided by the invention.
In the anastomat, the driving mechanism drives the working head to rotate for a certain angle around the first axis, and meanwhile, the working head deflects for the same angle relative to the main body. Due to the mutual meshing of the first sector gear and the second sector gear, the working head can rotate around the second axis at the same angle, so that the working head can deflect at the same angle relative to the main body again. Namely, under the condition of not increasing the operating force, the final deflection angle of the working head relative to the main body is doubled, namely, the working head obtains a larger swing angle. In addition, the first connecting rod and the second connecting rod act together to drive the working head to swing relative to the main body, so that the acting force of the working head on the single connecting rod is reduced. In addition, the third axis and the fourth axis are not collinear, so that the acting forces of the first connecting rod and the second connecting rod, which are respectively applied to the working head, are distributed dispersedly, and the phenomenon of local stress concentration of the working head is relieved.
Of course, the stapler also includes an adapter and a handle. The structures are not improved in the invention, and the structures are arranged by adopting the technical means commonly used in the field, so that the details are not repeated.
According to the nail bin assembly, the driving mechanism drives the working head to rotate for a certain angle around the first axis, and meanwhile, the working head deflects for the same angle relative to the main body. Due to the mutual meshing of the first sector gear and the second sector gear, the working head can rotate around the second axis at the same angle, so that the working head can deflect at the same angle relative to the main body again. Namely, under the condition of not increasing the operating force, the final deflection angle of the working head relative to the main body is doubled, namely, the working head obtains a larger swing angle. In addition, the first connecting rod and the second connecting rod act together to drive the working head to swing relative to the main body, so that the acting force of the working head on the single connecting rod is reduced. In addition, the third axis and the fourth axis are not collinear, so that the acting forces of the first connecting rod and the second connecting rod, which are respectively applied to the working head, are distributed dispersedly, and the phenomenon of local stress concentration of the working head is relieved.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (13)
1. A staple cartridge assembly, comprising: the working head is hinged with the main body through the connecting component, and the driving mechanism is used for driving the working head to swing relative to the main body;
the coupling assembly includes:
the first sector gear is fixedly connected with the working head, and the axis of the first sector gear is a first axis;
the second sector gear is fixedly connected with the main body, the second sector gear is meshed with the first sector gear, and the axis of the second sector gear is a second axis;
one end of the connecting piece can be connected to the working head in a rotating mode around the first axis, and the other end of the connecting piece can be connected to the main body in a rotating mode around the second axis;
the hinge can be connected to the main body in a rotating mode around the second axis; the hinge has a second raised region and the body has a second recessed region that mates with the second raised region; and
the nail bin seat is fixedly connected to the near end of the working head;
the drive mechanism includes:
a first driving rod movable in an axial direction of the main body;
one end of the first connecting rod is rotatably connected with the first driving rod, and the other end of the first connecting rod is rotatably connected with the working head; the first connecting rod rotates around a third axis relative to the working head;
the second driving rod can move along the axial direction of the main body, and the moving directions of the second driving rod and the first driving rod are opposite;
one end of the second connecting rod is rotatably connected with the second driving rod, the other end of the second connecting rod is rotatably connected with the working head, the second connecting rod rotates around a fourth axis relative to the working head, and the fourth axis, the third axis and the first axis are not collinear.
2. The staple cartridge assembly of claim 1, wherein said coupling assembly further comprises an elastic member, one end of said elastic member being fixedly connected to said working head and the other end being fixedly connected to said main body.
3. The staple cartridge assembly of claim 1, wherein said hinge has a first recessed area and said cartridge seat has a first raised area that is clearance fit with said first recessed area.
4. The staple cartridge assembly of claim 1, wherein said link is fixedly connected to said hinge.
5. The staple cartridge assembly of claim 1, wherein said coupling assembly comprises two of said first sector gears and two of said second sector gears, said two first sector gears being in meshing engagement with said two second sector gears, respectively.
6. The staple cartridge assembly of claim 1, wherein said coupling assembly comprises two said connectors symmetrically disposed on either side of said body.
7. The staple cartridge assembly of claim 1, wherein said third and fourth axes are symmetric about an axis of said working head, said first and second links are the same length, and said first and second drive levers are the same distance from an axis of said body.
8. The staple cartridge assembly of claim 7, wherein said drive mechanism further comprises a linkage assembly; when the first driving rod moves towards the far end direction of the main body, the first driving rod drives the second driving rod to synchronously move in the reverse direction through the linkage assembly, and/or when the first driving rod moves towards the near end direction of the main body, the first driving rod drives the second driving rod to synchronously move in the reverse direction through the linkage assembly.
9. The staple cartridge assembly of claim 8, wherein said body comprises a housing, said linkage assembly comprising a pulley and a tension cord secured to said housing; tensioning rope one end with first actuating lever fixed connection, the other end is walked around the pulley and with second actuating lever fixed connection.
10. The staple cartridge assembly of claim 8, wherein said linkage assembly comprises a first rack fixedly connected to said first drive rod, a second rack fixedly connected to said second drive rod, and a gear disposed between said first rack and said second rack, said gear being in meshing engagement with both said first rack and said second rack.
11. The staple cartridge assembly of claim 10, wherein said linkage assembly further comprises a first linkage fixedly connected to said first drive rod and a second linkage fixedly connected to said second drive rod; the first rack is fixedly arranged on the first linkage piece, and the second rack is fixedly arranged on the second linkage piece.
12. The staple cartridge assembly of claim 11, wherein said first rack is integrally formed with said first linkage and/or said second rack is integrally formed with said second linkage.
13. A stapler comprising the cartridge assembly of any one of claims 1-12.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811405591.5A CN109480937B (en) | 2018-11-23 | 2018-11-23 | Nail bin assembly and anastomat |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811405591.5A CN109480937B (en) | 2018-11-23 | 2018-11-23 | Nail bin assembly and anastomat |
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| CN109480937A CN109480937A (en) | 2019-03-19 |
| CN109480937B true CN109480937B (en) | 2021-05-11 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US7810693B2 (en) * | 2007-05-30 | 2010-10-12 | Ethicon Endo-Surgery, Inc. | Surgical stapling and cutting instrument with articulatable end effector |
| US8074859B2 (en) * | 2010-03-31 | 2011-12-13 | Tyco Healthcare Group Lp | Surgical instrument |
| US9468434B2 (en) * | 2014-06-03 | 2016-10-18 | Covidien Lp | Stitching end effector |
| US9844375B2 (en) * | 2014-12-18 | 2017-12-19 | Ethicon Llc | Drive arrangements for articulatable surgical instruments |
| CN105796140B (en) * | 2014-12-30 | 2018-01-09 | 苏州天臣国际医疗科技有限公司 | Hysteroscope surgical operation seaming and cutting device |
| CN105796142B (en) * | 2014-12-30 | 2018-01-09 | 苏州天臣国际医疗科技有限公司 | Hysteroscope surgical operation seaming and cutting device |
| CN205339036U (en) * | 2015-10-16 | 2016-06-29 | 逸思（苏州）医疗科技有限公司 | Surgical instrument |
| US10245030B2 (en) * | 2016-02-09 | 2019-04-02 | Ethicon Llc | Surgical instruments with tensioning arrangements for cable driven articulation systems |
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