CN109717919B

CN109717919B - Anastomat connecting rod

Info

Publication number: CN109717919B
Application number: CN201711044740.5A
Authority: CN
Inventors: 郭毅军; 钟定恩; 黄勇; 吴治中; 张兴伟; 曾健
Original assignee: Chongqing Xishan Science and Technology Co Ltd
Current assignee: Chongqing Xishan Science and Technology Co Ltd
Priority date: 2017-10-31
Filing date: 2017-10-31
Publication date: 2024-03-26
Anticipated expiration: 2037-10-31
Also published as: CN109717919A

Abstract

The invention provides a connecting rod of an anastomat, which is used for connecting a nail box and a power handle, and comprises a firing rod, an outer tube, a pull rod, a supporting seat, a firing transmission shaft, a rotary transmission shaft and a bending transmission shaft, wherein the firing rod is used for firing the nail box, the outer tube is used for driving the nail box to rotate, the pull rod is used for pulling the nail box to bend, and the firing transmission shaft, the rotary transmission shaft and the bending transmission shaft are respectively and rotatably arranged in a mounting hole formed in the supporting seat; the output end of the firing transmission shaft is connected with the firing bar through a firing transmission part, and the firing bar is driven to move back and forth under the action of power; the output end of the bending transmission shaft is connected with the pull rod through a bending transmission part, and the pull rod is driven to move back and forth under the action of power; the output end of the rotary transmission shaft is connected with the outer tube through a rotary transmission part, and the outer tube is driven to rotate under the action of power. The supporting seat is used as the main support of each part, and each transmission shaft is installed in the installation hole formed in the supporting seat and is limited in the axial direction, so that the stability of the transmission shaft in the rotating process is ensured. Each transmission path has simple structure and is convenient for assembly.

Description

Anastomat connecting rod

Technical Field

The invention belongs to the technical field of medical instruments, and particularly relates to a connecting rod of an anastomat.

Background

Surgical stapling devices have been widely used for suturing wounds, suturing and cutting internal tissues, and cutting staplers suitable for endoscopic surgery have also been developed. Laparoscopic surgery, also known as laparoscopic surgery, uses electronic imaging instead of direct vision with the naked eye and elongate instruments instead of fingers, and aims to complete observation, diagnosis, cutting, suturing and other treatments of lesions in the body with minimal incision paths, minimal tissue damage and minimal stress response of the body.

Conventional staplers generally perform only basic cutting and stapling functions, and are classified as manual staplers and electric staplers. With the increasing demand for treatment, in order to accommodate treatment of lesions at different locations, an electric stapler capable of bending and rotating a magazine has appeared in the market, thereby improving the adaptability of the stapler.

The anastomat with the rotating and bending functions is generally composed of a nail box, a connecting rod and a power handle, wherein the power handle provides power, and an actuating mechanism in the connecting rod pulls the nail box to realize bending action; the nail box is driven to rotate by the rotary transmission component on the connecting rod, but the actuating mechanism for executing the bending action and the rotary action in the prior art has complex structure, more transmission components, inconvenient installation and execution of the action and inconvenient realization of the compactness of the anastomat.

Disclosure of Invention

In view of the above-mentioned shortcomings of the prior art, an object of the present invention is to provide a connecting rod for a stapler, which simplifies the structure and facilitates assembly.

To achieve the above object and other related objects, the present invention provides the following technical solutions:

the anastomat connecting rod is used for connecting the nail box and the power handle, and comprises a firing rod for firing the nail box, an outer tube for driving the nail box to rotate, a pull rod for pulling the nail box to bend, a supporting seat, a firing transmission shaft, a rotating transmission shaft and a bending transmission shaft, wherein the firing transmission shaft, the rotating transmission shaft and the bending transmission shaft are respectively and rotatably arranged in a mounting hole formed in the supporting seat; the output end of the firing transmission shaft is connected with the firing bar through a firing transmission part, and the firing bar is driven to move back and forth under the action of power; the output end of the bending transmission shaft is connected with the pull rod through a bending transmission part, and the pull rod is driven to move back and forth under the action of power; the output end of the rotary transmission shaft is connected with the outer tube through a rotary transmission part, and the outer tube is driven to rotate under the action of power.

By adopting the structure, the supporting seat is used as the main support of each part, and each transmission shaft is installed in the installation hole formed in the supporting seat, so that the stability of the transmission shaft in the rotating process is ensured. Each transmission path has simple structure and is convenient for assembly.

Further, the bending transmission part comprises a connecting sleeve and a stirring piece for stirring the connecting sleeve, the front part of the bending transmission shaft is a screw rod, the stirring piece is sleeved on the screw rod of the bending transmission shaft and is in threaded fit with the screw rod, the pull rod is supported on the connecting sleeve, and the bending transmission shaft drives the stirring piece, the connecting sleeve and the pull rod to move back and forth under the action of power.

By adopting the structure, the pull rod is supported on the connecting sleeve, power is connected by the bending transmission shaft, and the stirring piece axially moves along the bending transmission shaft in the rotation process of the bending transmission shaft, so that the connecting sleeve and the pull rod are driven to axially move, namely, move forwards and backwards; the bending action of the nail box is realized by pulling the nail box through the pull rod. Compared with the prior art, the structure is simple, and the assembly is convenient.

Further, the stirring piece is of a shifting fork structure, the connecting sleeve is rotatably arranged relative to the stirring piece, and the supporting seat is provided with a guide mechanism for enabling the stirring piece to move along the axial direction of the bending transmission shaft and an auxiliary supporting mechanism for supporting the front end of the bending transmission shaft.

The connecting sleeve is rotatable, and when the rotary action of the anastomat is executed, the connecting sleeve and the poking piece can relatively move, so that interference is avoided. The structure prevents the toggle piece from swinging in the direction vertical to the transmission shaft, and ensures the stability of the forward and backward movement of the toggle piece.

Further, the connecting rod also comprises a supporting tube, the supporting tube is arranged on the supporting seat, the front part of the firing transmission shaft is a screw rod, the firing transmission part is a screw sleeve arranged in the supporting tube, the screw sleeve is in threaded sleeve joint with the screw rod, the firing rod is connected with the front end of the screw sleeve, and the firing transmission shaft drives the firing rod to move back and forth through the screw sleeve under the action of power.

Further, the firing transmission shaft is a stepped shaft with the middle diameter larger than the front and rear diameters, a first positioning structure and a second positioning structure for axial positioning are respectively arranged at the front and rear of the large-diameter section of the firing transmission shaft, and balls or end bearings are respectively arranged between the end face of the large-diameter section and the first positioning structure and the second positioning structure.

Because the force that the firing transmission shaft axially bears in the rotating process is larger, the positioning structure is arranged in front of and behind the large-diameter section of the firing transmission shaft so as to facilitate axial limiting, and the ball or the end face bearing is arranged between the positioning structure and the shaft shoulder of the large-diameter section so as to facilitate bearing the axial force in the rotating process, improve the axial supporting strength of the firing transmission shaft, ensure the stability of firing and simplify the installation structure.

Further, the rotary transmission part comprises a gear, a gear ring, a shell and a connector for connecting the nail box and the outer tube, the gear is arranged at the front end of the rotary transmission shaft, the shell is connected with the supporting seat and can rotate relative to the supporting seat, the gear ring is connected with the shell and meshed with the gear, the outer tube is connected with the shell, and the rotary transmission shaft drives the shell, the outer tube and the connector to rotate under the action of power through the gear and the gear ring.

Further, the connecting rod still includes the support piece that rotatably sets up on the supporting seat and is located the place ahead of support piece and is used for the joint of being connected with the nail casket, be provided with the protection tube between joint and the support piece, the protection tube front end is connected with the joint, and the rear end links to each other with support piece, is provided with the wire that is used for connecting electric elements on joint and the support piece in this protection tube.

The two ends of the wire are respectively connected with the electric element of the connector and the electric element of the supporting piece, and a protection tube is arranged between the connector and the supporting piece to serve as a wiring channel for protecting and limiting the wire. In the process of driving the anastomat nail box to rotate, the lead is limited in the protective tube and rotates along with the shell, the inner supporting body, the outer tube, the joint and the like; preventing the wire from swinging randomly and avoiding the problems of winding, loosening and the like.

Further, the supporting seat is provided with a contactor and an electric interface which are connected, the contactor is provided with a plurality of contact pieces, the supporting piece is provided with a contact ring corresponding to the contact pieces, the contact ring is connected with the rear end of the lead, and the contact ring keeps contact with the corresponding contact pieces when the supporting piece rotates relative to the supporting seat.

The electric interface is used for being connected with the power handle electricity, and when carrying out the rotatory action of nail casket, supporting seat, contactor and electric interface do not rotate, and the supporter is to rotate for the supporting seat, through the cooperation of contact ring and contact piece, has guaranteed the in-process contact stability of relative rotation.

Further, the connecting rod also comprises a shell and an actuating mechanism for executing unlocking/locking operation when the nail box is connected with the connecting rod, wherein the front end of the shell is connected with the outer tube, the rear part of the actuating mechanism is rotatably connected with the supporting seat, one part of the actuating mechanism is positioned in the shell, the other part of the actuating mechanism extends out of the shell, and a sealing structure is arranged between the part of the actuating mechanism extending out of the shell or the part penetrating through the shell and the shell.

The sealing structure is arranged at the position where the actuating mechanism extends out of the shell or passes through the shell, and the sealing between the actuating mechanism and the shell is realized in the process of operating the actuating mechanism, so that liquid is effectively prevented from entering the shell from the position, a good sealing effect is achieved, and a transmission assembly in the shell is protected.

Further, the firing transmission shaft, the rotary transmission shaft and the bending transmission shaft are all stepped shafts, a limiting sleeve used for axial limiting is arranged at the rear of each transmission shaft shoulder in the mounting hole, a transmission joint is sleeved at the rear end of each transmission shaft, a spring is arranged between the inner flanging formed at the front end of the limiting sleeve, an end cover used for limiting the limiting sleeve and the transmission joint to slide out is arranged at the rear of the supporting seat, and an access hole corresponding to the transmission joint is formed in the end cover.

As described above, the invention has the beneficial effects that: the supporting seat is used as the main support of each part, and each transmission shaft is installed in the mounting hole formed in the supporting seat, so that the stability of the transmission shaft in the rotating process is ensured. The main body supporting structure is simplified, each transmission path is simple in structure and convenient to assemble.

Drawings

FIG. 1 is a schematic structural diagram of embodiment 1 of the present invention;

FIG. 2 is a schematic view of the firing drive mechanism of example 1;

FIG. 3 is a partial view of FIG. 2;

FIG. 4 is a view A-A of FIG. 2;

FIG. 5 is a schematic view of the axial limiting structure in embodiment 1;

FIG. 6 is a schematic view of another axial limiting structure in embodiment 1;

FIG. 7 is a schematic view of the installation structure of the rotary transmission mechanism in embodiment 1;

FIG. 8 is a schematic view of the installation structure of the bending transmission mechanism in embodiment 1;

fig. 9 is a perspective view of the bending transmission mechanism in embodiment 1;

FIG. 10 is an exploded view of FIG. 9;

FIG. 11 is a schematic view showing the overall structure of embodiment 2 of the present invention;

FIG. 12 is a schematic view showing the installation of a bending transmission mechanism in embodiment 2 of the present invention;

FIG. 13 is a view B-B of FIG. 11;

FIG. 14 is a view C-C of FIG. 11;

FIG. 15 is a view D-D of FIG. 11;

FIG. 16 is a view E-E of FIG. 11;

fig. 17 is a schematic general structure of embodiment 3 of the present invention;

FIG. 18 is a schematic view of the structure of FIG. 17 with internal transmission components omitted;

FIG. 19 is a schematic view of the structure of FIG. 18 with the outer tube and the housing omitted;

FIG. 20 is an enlarged view of a portion of FIG. 19;

fig. 21 is a schematic overall structure of embodiment 4 of the present invention;

FIG. 22 is a schematic view showing a partial structure of embodiment 4 of the present invention;

fig. 23 is a schematic structural view of embodiment 5 of the present invention.

Description of the part reference numerals

1-a supporting seat; 21-a housing; 22 connecting seats; 23-an outer tube; 24-linker; 25-connecting holes; 26-screw;

31-bending the transmission shaft; 31 A-A screw; 32-a toggle piece; 32a support; 32 b-a toggle part; 33-connecting sleeve; 33 a-boss; 33b limit grooves; 34-a spring; 35-a pull rod; 35 a-bayonet; 36-limiting sleeve; 37 guides; 38-auxiliary brackets; 38 A-A first connection hole; 38 b-a second connection hole.

41-firing drive shaft; 42-a screw sleeve; 42 a-front cannula; 42 b-rear cannula; 43-supporting the tube; 43 a-front section; 43 b-rear section; 43 c-guide groove; 44-an intermediate joint; 45-firing bar;

51-rotating a drive shaft; 52-rotating the transmission member; 52 a-gear; 52 b-ring gear; 52 c-protrusions; 51 A-A collar; 51 b-positioning sleeve; 51 c-boss; 51 d-spring;

61/62/63-drive joint; 71-a first sleeve; 72-a first boss; 73-a second sleeve; 74-a second boss; 75-springs; 76—a first step; 77-a second step; 81/82-balls; 9-end caps; 91-access holes;

101-protecting tube; 102-an inner support; 103-wiring grooves; 104-wire vias; 105-contactor; 106-contact pieces; 107-contact ring; 108-an electrical interface;

111-an actuator lever; 112-a bend; 113-a drive rod; 114-dial button; 115-a first sealing ring; 116-lock sleeve; 117-a second seal ring; 118-third seal ring.

Detailed Description

Further advantages and effects of the present invention will become apparent to those skilled in the art from the disclosure of the present invention, which is described by the following specific examples.

In this example, the front-rear direction refers to the state of operating the stapler, the side of the stapler facing the patient is the front, and the side facing away from the patient is the rear, i.e. the magazine is in front of the connecting rod, and the power handle is behind the connecting rod.

Example 1

As shown in fig. 1, a stapler attachment bar, wherein the stapler includes a magazine, an attachment bar, and a power handle, the attachment bar being connected between the power handle and the magazine. The connecting rod comprises a supporting seat 1, a supporting tube 43, a shell 21, an outer tube 23 for driving the nail box to rotate, a pull rod 35 for pulling the nail box to bend, a firing rod 45 for firing the nail box, a firing transmission shaft 41, a rotating transmission shaft 51 and a bending transmission shaft 31, wherein the rear part of the shell 21 is rotatably sleeved on the supporting seat 1, the rear end of the outer tube 23 is connected with the shell 21 and can synchronously rotate, the front end of the outer tube 23 is connected with a connector 24, and the connector 24 is used for connecting the nail box; the supporting tube 43 is arranged in the outer tube 23 and the outer shell 21, and the rear end of the supporting tube is connected with the supporting seat 1 for installing a firing mechanism. The pull rod 35 is used for pulling the staple cartridge to bend, and the firing bar 45 is used for firing the staple cartridge.

Wherein, three mounting holes are arranged on the supporting seat 1, and the firing transmission shaft 41, the rotary transmission shaft 51 and the bending transmission shaft 31 are respectively and rotatably arranged in the three mounting holes arranged on the supporting seat 1 and are limited in the axial direction; the rear ends of the firing transmission shaft 41, the rotary transmission shaft 51 and the bending transmission shaft 31 are respectively provided with a power input interface; the output end of the firing transmission shaft 41 is connected with a firing bar 45 through a firing transmission part; the firing bar 45 can rotate relative to the firing transmission component, but can move synchronously in the axial direction; the output end of the bending transmission shaft 31 is connected with a pull rod 35 through a bending transmission part; the output end of the rotary transmission shaft 51 is connected with the shell 21 through a rotary transmission part, and drives the shell 21, the outer tube 23 and the joint 24 to rotate under the power action.

Fig. 2 shows an installation schematic of a percussion transmission mechanism of the anastomat and a supporting seat 1, wherein a percussion transmission part is a threaded sleeve 42, a supporting tube 43 and a percussion transmission shaft 41 are arranged on the supporting seat 1, a percussion bar 45 is connected with the front end of the threaded sleeve 42 through an intermediate joint 44, the percussion bar 45 is rotatably connected with the intermediate joint 44 and is axially fixed, and the intermediate joint 44 is fixedly connected with the threaded sleeve 42. The front part of the firing transmission shaft 41 is provided with a screw 41a, the rear end of the firing transmission shaft is provided with a power interface, a screw sleeve 42 is arranged in a supporting tube 43, a guide structure is arranged between the screw sleeve 42 and the supporting tube 43, the screw sleeve 42 is in threaded sleeve joint with the screw 41a, and when the firing transmission shaft 41 rotates, the screw sleeve 42 is driven to axially move, so that the firing bar 45 is driven to act.

As shown in fig. 2-4, a mounting hole is formed in the support base 1 in a penetrating manner in the front-rear direction, the rear end of the support tube 43 extends into the mounting hole and is fixedly connected with the support base 1, and the firing transmission shaft 41 is arranged in the rear portion of the support tube 43.

Preferably, the firing transmission shaft 41 is a stepped shaft with a middle diameter larger than the front and rear diameters, a first positioning structure and a second positioning structure for axially positioning the firing transmission shaft 41 are respectively arranged at the front and rear sides of a large-diameter section of the firing transmission shaft 41, and balls or end face bearings are respectively arranged between the end face of the large-diameter section and the first positioning structure and the second positioning structure so as to support the axial stress of the firing transmission shaft 41, ensure the structural strength of the firing transmission shaft 41 and prevent the rotation of the firing transmission shaft 41 from being influenced.

Wherein, a first sleeve 71 is arranged in the rear part of the supporting tube 43, the first sleeve 71 is sleeved outside the firing transmission shaft 41, the front end of the first sleeve 71 is propped against a step formed by the inner wall of the supporting tube 43, a first boss 72 is inwards formed at the front end of the first sleeve 71, the first boss 72 is positioned in front of the large-diameter section to form the first positioning structure, and a circle of balls 81 are arranged between the first boss 72 and the front end surface of the large-diameter section of the firing transmission shaft 41; a second sleeve 73 is arranged in the support tube 43 and positioned behind the large-diameter section of the transmission shaft, a second boss 74 is formed inwards at the front end of the second sleeve 73, the second boss 74 forms the second positioning structure, and a circle of balls 82 is arranged between the second boss 74 and the rear end face of the large-diameter section.

The ball is arranged in the embodiment, so that the compactness of the structure is realized; if space permits, it can also be provided as an end bearing.

As a further preference, an end cap 9 is provided at the rear end of the support base 1, which end cap 9 presses against the rear ends of the second sleeve 73 and the first sleeve 71 so as to axially support and limit the second sleeve 73 and the first sleeve 71.

In order to facilitate the butt joint with the power handle power head, a firing transmission joint 61 is sleeved at the rear end of the firing transmission shaft 41, and the firing transmission joint 61 and the firing transmission shaft 41 can synchronously rotate through flat square fit; a spring 75 is arranged between the firing transmission joint 61 and the second boss 74, and a hole corresponding to the firing transmission structure is formed on the end cover 9 so as to facilitate the connection of the power head and prevent the firing transmission joint 61 from falling off.

As a further preferred option, the threaded sleeve 42 includes a front sleeve 42a that is unthreaded and a rear sleeve 42b that is internally threaded, the front sleeve 42a and the rear sleeve 42b being fixedly connected, such as by a welded connection, the rear sleeve 42b being threadedly engaged with the threaded rod 41 a; the threaded sleeve 42 is divided into two sections, one of which is not provided with threads, and the whole section is tapped, so that the processing amount of threads is reduced, and the cost is reduced.

As a further preference, the support tube 43 comprises a front section 43a and a rear section 43b connected, an axial guide being provided between the rear section 43b and the threaded sleeve 42. Specifically, the front section 43a of the supporting tube 43 is a smooth section, the inner wall of the rear section 43b is provided with a guide groove 43c, the outer wall of the threaded sleeve 42 is provided with a guide block, and the guide of the forward and backward movement of the threaded sleeve 42 is realized through the cooperation of the guide block and the guide groove 43c, so that the threaded sleeve 42 is prevented from rotating circumferentially. In the embodiment, the supporting tube 43 is divided into a front section and a rear section, and only the rear section 43b is slotted, so that the processing amount is reduced, and the cost is saved.

In another embodiment, as shown in FIG. 5, the first sleeve 71 may be eliminated and the first positioning feature may be a ring of first steps 76 formed on the inner wall of the support tube 43, the first steps 76 being located forward of the large diameter section of the firing drive shaft 41.

In another embodiment, as shown in fig. 6, the first sleeve 71 is omitted, the rear end of the supporting tube 43 is fixedly connected with the supporting seat 1, a mounting hole is formed on the supporting seat 1 in a penetrating manner along the front-rear direction, the firing transmission shaft 41 is arranged in the mounting hole, the screw 41a of the transmission shaft extends out of the mounting hole forwards, and the first positioning structure is a second step 77 formed on the inner wall of the mounting hole.

As shown in fig. 7, the rotation transmitting member 52 includes a gear 52a and a ring gear 52b which are meshed; wherein, the rear end of the rotary transmission shaft 51 is provided with a power interface, a gear 52a is arranged at the front end of the rotary transmission shaft 51, the shell 21 is connected with the supporting seat 1 and can rotate relative to the supporting seat 1, and a gear ring 52b is connected with the shell 21 and can synchronously rotate with the shell 21; when the rotary transmission shaft 51 rotates under the power, the housing 21, the outer tube 23 and the joint 24 are rotated by the gear 52a, the ring gear 52 b.

The power is connected by the power interface at the rear end of the rotary transmission shaft 51, and in the process of rotating the rotary transmission shaft 51, the outer shell 21 and the outer tube 23 are driven to rotate by the gear 52a and the gear ring 52b, and the outer tube 23 is connected with the nail box by the connector 24, so that the nail box is driven to rotate. Compared with the prior art, the device has the advantages of simplifying the installation structure, simplifying the transmission path, facilitating assembly and ensuring the stability of transmission.

Specifically, a protrusion 52c is provided on the outer wall of the ring gear 52b, a groove is provided on the housing 21 to be fitted with the protrusion 52c, and synchronous rotation is achieved by the fitting of the groove and the protrusion 52c, and the axial position is kept relatively fixed. The outer tube 23 is arranged concentrically with the outer shell 21, the rear end of the outer tube 23 is connected with the front end of the outer shell 21, and the rear part of the outer shell 21 is sleeved on the supporting seat 1.

In order to facilitate the support of the anastomat firing assembly, a connecting seat 22 for supporting an anastomat supporting tube 43 is arranged in the front end of the shell 21, a transmission assembly for installing firing is arranged in the supporting tube, the rear end of the outer tube 23 is fixedly connected with the connecting seat 22, and the connecting seat 22 is connected with the shell 21 and can synchronously rotate. Thereby solving the problem of supporting the support tube and facilitating the connection between the outer tube 23 and the housing 21.

In this example, the housing 21 and the connection base 22 are correspondingly provided with connection holes 25, and the housing 21 and the connection base 22 are connected by screws 26 installed in the connection holes 25. The inside design of connecting seat 22 is the shoulder hole, and outer tube 23 rear end stretches into connecting seat 22 inner wall connecting seat 22 welding.

In order to facilitate the installation and support of the rotary transmission shaft 51, the supporting seat 1 is provided with a through installation hole along the front-back direction, the rotary transmission shaft 51 is arranged in the installation hole, and the front end of the rotary transmission shaft 51 extends out of the installation hole to be connected with the gear 52 a.

The rotary transmission shaft 51 is a stepped shaft, and a first positioning mechanism and a second positioning mechanism for axial positioning are respectively arranged at the front and rear sides of a large-diameter section of the rotary transmission shaft 51. Namely, a positioning mechanism is arranged at the positions of the front shaft shoulder and the rear shaft shoulder for axial positioning.

Specifically, the first positioning mechanism is a first convex ring 51a formed on the inner wall of the front end of the mounting hole, the second positioning mechanism is a positioning sleeve 51b arranged behind the large-diameter section of the rotary transmission shaft 51, the front end of the positioning sleeve 51b is close to or contacts with the rear end of the large-diameter section, the rear end of the supporting seat 1 is provided with an end cover 9, and the end cover 9 is pressed at the rear end of the positioning sleeve 51b and used for limiting the rear end position of the positioning sleeve 51 b.

In order to prevent deflection of the rotary transmission shaft 51, a circle of boss 51c is formed inward at the front end of the positioning sleeve 51b, so that the acting area with the shaft shoulder of the rotary transmission shaft 51 is increased, and the axial positioning is better.

In order to facilitate the connection of power and the connection with the power head of the power handle, a transmission joint 62 is arranged at the rear end of the rotary transmission shaft 51 through a flat square sleeve, the transmission joint 62 and the rotary transmission shaft 51 synchronously rotate, and a spring 51d is arranged between the transmission joint 62 and a boss 51c of the positioning sleeve 51 b. An access hole 91 is formed in the end cover 9, and the aperture of the access hole 91 is smaller than that of the transmission joint 85 so as to prevent the transmission joint from falling out.

As shown in fig. 8 to 10, the front part of the bending transmission shaft 31 is a screw 31a, and the rear end is provided with a power interface for receiving power from the power handle; the bending transmission part comprises a connecting sleeve 33 and a poking piece 32, wherein the connecting sleeve 33 is movably sleeved outside the supporting tube 43 and can slide back and forth along the supporting tube 43 under the action of the poking piece 32. The pull rod 35 is supported and fixed on the connecting sleeve 33, and the stirring piece 32 is sleeved on the screw rod 31a of the bending transmission shaft 31 and is in threaded fit with the screw rod 31 a; the toggle member 32 is connected to the connecting sleeve 33 and acts on the connecting sleeve 33 to drive the connecting sleeve 33 and the pull rod 35 to move back and forth under the action of the bending transmission shaft 31. In this example, the support tube 43 of the connecting rod is used as a support, so that the components are reduced, and the structure is compact. In another embodiment, a support member may be added to support and guide the connecting sleeve 33.

The rear end of the pull rod 35 is fixedly connected with the connecting sleeve 33, in this example, a groove is formed in the connecting sleeve 33, and the rear end of the pull rod 35 is turned into the groove and is connected in a welding mode; the front end of the pull rod 35 is provided with a bayonet 35a or a draw hook for cooperation with the magazine in order to pull the magazine.

The pull rod 35 is fixedly connected with the connecting sleeve 33 and can synchronously move, power is connected to the power interface at the rear end of the bending transmission shaft 31, and in the process of driving the bending transmission shaft 31 to rotate, the stirring piece 32 axially moves along the bending transmission shaft 31, so that the connecting sleeve 33 and the pull rod 35 are driven to axially move along the bending transmission shaft 31, namely, move forwards and backwards; the bending action of the magazine is achieved by pulling the magazine by the pull rod 35. The stirring piece 32 is matched with the connecting sleeve 33 to drive the connecting sleeve 33 and the pull rod 35 to move back and forth, so that parts are few, the structure is simple, the machining is convenient, the assembly precision is guaranteed, and the cost is saved.

As a preferred scheme, the poking piece 32 is in a poking fork structure and is provided with a supporting part 32a and a poking part 32b which are connected, wherein a screw hole is formed in the supporting part 32a and is matched with a screw rod 31a of the bending transmission shaft 31; a limiting structure for limiting the relative forward and backward movement of the toggle part 32b and the connecting sleeve 33 is arranged between the toggle part and the connecting sleeve 33. That is, the toggle portion 32b and the connecting sleeve 33 are positioned in the axial direction, thereby achieving the synchronous forward and backward movement.

The limiting structure is two bosses 33a arranged on the connecting sleeve 33 front and back, a limiting groove 33b is formed between the two bosses 33a, the stirring part 32b is positioned in the limiting groove 33b, and the front and back sections of the stirring part 32b are propped against the side wall of the boss 33a, so that the connecting sleeve 33 is driven to move front and back through the interaction force of the stirring part 32b and the boss 33 a.

When the anastomat has both a rotating function and a bending function, interference is avoided; the connecting sleeve 33 is rotatably arranged relative to the stirring piece 32, the connecting sleeve 33 is rotatable, and when the rotary motion of the anastomat is performed, the connecting sleeve 33 and the stirring piece 32 can relatively move, so that interference is avoided.

Preferably, the stirring portion 32b is an arc-shaped clamping portion, the diameter of the arc-shaped clamping portion is matched with the outer circular surface of the connecting sleeve 33, the arc-shaped clamping portion is of a semi-annular structure, the stirring portion is convenient to hold on the outer wall of the connecting sleeve 33, and the transmission stability is kept.

In this example, in order to enhance the stability of rotation and axial positioning of the curved transmission shaft 31, the curved transmission shaft 31 is set to be a stepped shaft with a larger middle diameter, a mounting hole is formed in the supporting seat 1 for mounting the curved transmission shaft 31, the front end of the mounting hole is a stepped hole, a stop collar 36 is arranged in the mounting hole and positioned behind a shaft shoulder, the stop collar 36 is blocked behind the shaft shoulder, the step of the stepped hole is blocked in front of the curved transmission shaft 31, so that the curved transmission shaft 31 is axially limited, an end cover 9 is mounted at the rear end of the supporting seat 1 for preventing the stop collar 36 from sliding out of the mounting hole, and the end cover 9 is in butt joint with the stop collar 36.

In order to facilitate the connection of the power interface of the bending transmission shaft 31 and the power handle, the rear end of the bending transmission shaft 31 is provided with a transmission joint 63 through a flat square sleeve, and the transmission joint 63 and the bending transmission shaft 31 synchronously rotate; a spring 34 is arranged in front of the drive joint 63; in this example, the spring 34 is sleeved outside the bending transmission shaft 31, the front end of the spring is propped against the inner turnup edge of the front end of the limit sleeve 36, and the rear end of the spring is propped against the transmission joint 63; in another embodiment, the front end of the spring 34 may bear against a shoulder.

Example 2

On the basis of embodiment 1, a guide mechanism for holding the toggle piece 32 to move axially along the bending transmission shaft 31 is also provided, which guide mechanism is simultaneously used for restricting the toggle piece 32 from swinging radially along the bending transmission shaft 31. This structure prevents the toggle piece 32 from swinging in the direction perpendicular to the bending transmission shaft 31, ensuring the stability of the forward and backward movement of the toggle piece 32.

As shown in fig. 11, 12 and 14, in this example, the guide mechanism includes two guide members 37 disposed on the support base 1 in parallel to the bending transmission shaft 31, and the two guide members 37 are respectively located on both sides of the bending transmission shaft 31 and contact with the outer wall of the toggle member 32. The rotation is guided and restricted by the outer wall of the toggle member 32.

In another embodiment, the guiding element 37 may be guided by passing through the stirring element 32, in which case one or more guiding elements 37 may be provided, the guiding element 37 may be a guiding column, and a guiding hole corresponding to the guiding column is formed on the stirring element 32.

Preferably, the bending transmission shaft 31 is prevented from swinging or shifting, and the stability of the axial movement of the connecting sleeve 33 is ensured. The rear end of the guide 37 is supported on the support base 1, the front end of the guide 37 is provided with an auxiliary bracket 38, and the front end of the bending transmission shaft 31 is supported on the auxiliary bracket 38.

In this example, the number of the guide members 37 is two, the auxiliary support 38 is supported on the two guide members 37, specifically, two first connecting holes 38a and one second connecting hole 38b are formed in the auxiliary support 38, the front ends of the two guide members 37 extend into the two first connecting holes 91, the auxiliary support 38 is supported, the front ends of the bending transmission shafts 31 extend into the second connecting holes 38b and are in clearance fit with the second connecting holes 38b, and therefore the front ends of the bending transmission shafts 31 are supported through the auxiliary support 38, and stability in rotation of the bending transmission shafts 31 is guaranteed.

Example 3

In the prior art, in order to detect indexes such as stress conditions of the magazine or specifications of the magazine, wires are generally arranged along the front-rear direction of the connecting rod for connecting electrical components provided at the front and rear portions of the connecting rod. The connecting rod has a certain length, so that the wire is easy to wind or loosen when the rotating action of the anastomat is executed under the condition that the wire is not reasonably fixed; and the wires interfere with each other.

In view of the above drawbacks, this example is further optimized on the basis of embodiment 1 or 2, and in order to facilitate the protection of the wire, a protection tube 101 is also provided for wiring.

As shown in fig. 15 to 20, the connecting rod further includes a support rotatably provided on the support base 1, wherein the support includes a connection base 22 and an inner support body 102 connected by a screw 26 and capable of being rotated synchronously, a protection tube 101 for arranging a wire is provided between the connector 24 and the connection base 22, the protection tube 101 is connected at a front end thereof to the connector 24 and at a rear end thereof to the connection base 22, and the wire is provided in the protection tube 101 for connecting an electrical component on the connector 24 and an electrical component on the inner support body 102. The wires can be arranged into a plurality of wires according to the requirements. A protective tube 101 is provided to fix and protect the wire.

Specifically, the protection tube 101 is a plurality of; each protection tube 101 is internally provided with a wire, and the wires are separated by the protection tube 101, so that the problems of mutual winding or interference and the like are avoided.

In another embodiment, the protection tube 101 is one, and a plurality of wiring channels are arranged in the protection tube 101 at intervals, and each wiring channel is internally provided with a guide, so that a plurality of wires are arranged independently.

Preferably, the protective tube 101 is located between the outer tube 4 and the support tube 6. The protective tube 101 is installed by means of the gap between the outer tube 4 and the support tube 6, resulting in a compact structure.

In order to facilitate the installation and fixation of the protection tube 101, fixing holes are correspondingly formed in the connector 24 and the connecting seat 22, the front end of the protection tube 101 is installed in the fixing hole of the connector 24, the rear end of the protection tube 101 stretches into the fixing hole of the connecting seat 22, and the protection tube 101, the connector 24 and the connecting seat 22 are fixed in a welding mode. Through the fixing hole, the positioning of the protection tube 101 during installation is facilitated.

Preferably, the supporting seat 1 is provided with a contactor 105 and an electrical interface 108, the electrical interface 108 is used for connecting a power handle, the contactor 105 is used for connecting with an electrical element of the inner supporting body 102, and the contactor 105 is electrically connected with the electrical interface 108; the contactor 105 has a plurality of contact pieces 106, the inner support 102 is provided with contact rings 107 corresponding to the contact pieces 106, the contact rings 107 are arranged along the axial direction, the contact rings 107 are connected with the rear ends of the wires, and the contact rings 107 are kept in contact with the corresponding contact pieces 106 when the inner support 102 rotates relative to the support base 1. When the rotary action of the nail cartridge is performed, the supporting seat 1, the contactor 105 and the electric interface 108 do not rotate, the inner supporting body 102 rotates relative to the supporting seat 1, and the contact ring 107 is matched with the contact piece 106, so that the contact stability in the relative rotation process is ensured, and the interference of the rotary part and the fixed part is avoided.

Preferably, the contact ring 107 is disposed on the inner wall of the inner support 102, and the contactor 105 extends into the inner support 102.

In order to facilitate wiring, wiring grooves 103 are formed in the front-rear direction on the outer wall of the inner support body 102, and the wiring grooves 103 extend from the front end of the inner support body 102 to the contact ring 107. Facilitating the placement of the wires from the rear end of the protective tube 101 to the contact ring 107. The dashed lines in fig. 1 and 2 illustrate the wires running inside the wiring slots 103.

In order to facilitate the arrangement of the wire turning part, a wire through hole 104 is arranged at the bottom of the wire groove 103 and positioned at the rear side of the protection tube 101, so that the wire can conveniently enter the wire groove 103 through the wire through hole 104 after extending out of the rear end of the protection tube 101, and the wire through hole 104 is axially staggered with the rear end of the connecting seat 22, thereby avoiding the breakage of the wire.

For easy installation and support, the support further comprises a shell 23, the shell 23 is sleeved outside the inner support body 102, the connecting seat 22 is installed inside the front end of the inner support body 102, the rear end of the outer tube 4 is welded with the connecting seat 22, and the shell 23, the inner support body 102 and the connecting seat 22 are connected through screws 26 and can synchronously rotate.

The two ends of the wire are respectively connected with the electric element of the connector 24 and the electric element of the inner support body 102, and a protection tube 101 is arranged between the connector 24 and the connecting seat 22 as a wiring channel for protecting and limiting the wire. During the process of driving the stapler nail box to rotate, the lead is limited in the protection tube 101 and rotates along with the inner support body 102, the outer tube 4, the joint 24 and the like; preventing the wire from swinging randomly and avoiding the problems of winding, loosening and the like.

Example 4

In the prior art, the connecting rod generally comprises a shell and a plurality of groups of transmission parts arranged in the shell, an operating mechanism is arranged in the connecting rod, and the operating mechanism is used for locking and unlocking the nail box when the nail box is in butt joint with the connecting rod; the poking button of the operating mechanism is arranged on the shell and is exposed to the outside; this location is where liquid is most easily accessed during use. The existing anastomat does not effectively seal between the poking button and the shell, so that liquid is easy to enter the shell from the joint of the shell and the poking button, and the performance of a transmission part is influenced.

On the other hand, the external structure of the connecting rod of the existing electric anastomat is complex, so that the sealing of the inside of the outer shell becomes more difficult.

This example was therefore further optimized on the basis of examples 1, 2, 3.

The connecting rod shown in fig. 21 and 22 further comprises an actuator, wherein the actuator is used for performing unlocking and locking operations when the magazine is connected with the connecting rod, and the key is that one part of the actuator is positioned in the housing 21, the other part of the actuator extends out of the housing 21, and a sealing structure is arranged between the part of the actuator extending out of the housing 21 and the housing 21. In the process of operating the actuating mechanism, the sealing between the actuating mechanism and the shell 21 is realized, so that liquid is effectively prevented from entering the shell 21 from the position, a good sealing effect is achieved, and a transmission assembly in the shell 21 is protected.

Preferably, the actuator includes an actuator lever 111 disposed in the housing 21 and a dial 114 disposed outside the housing 21, the dial 114 being connected to the actuator lever 111 via a drive lever 113, and a sealing structure being disposed between the drive lever 113 and the housing 21.

Specifically, a sealing channel is formed on the housing 21 along the front-back direction (i.e., the axial direction of the housing 21), the driving rod 113 is slidably disposed in the sealing channel along the front-back direction, a circle of sealing groove is formed on the outer wall of the driving rod 113, a first sealing ring 115 is installed in the sealing groove, and the first sealing ring 115 keeps contact with the inner wall of the sealing channel during the front-back sliding process of the driving rod 113.

With the above structure, when the dial knob 114 is operated, the driving lever 113 slides back and forth in the sealing passage, and the sealing is maintained by the first seal ring 115 during sliding, so that the operation of the dial knob 114 and the actuating lever 111 is not interfered.

For convenience of operation, the knob 114 is disposed outside the top of the housing 21, the rear end of the actuating rod 111 is bent upward to form a bending portion 112, one end of the driving rod 113 is connected to the bending portion 112, and the other end is connected to the knob 114. Bending the actuating lever 111 upward facilitates the horizontal arrangement of the driving lever 113.

Example 5

As shown in fig. 23, in the present example, the housing 21 and the support base 1 and the housing 21 and the outer tube 23 are sealed, respectively, in the present example. The structure of the drive stapler is simplified, the space formed by the outer tube 23, the housing 21 and the supporting seat 1 is used for installing a drive assembly, and a seal is arranged between the housing 21 and the supporting seat 1 as well as between the outer tube 23, so that liquid is further prevented from entering the housing 21 from the outside.

Preferably, the shell 21 is rotatably sleeved outside the front part of the supporting seat 1 and is axially limited by a lock sleeve 116 arranged on the supporting seat 1; so that the shell 21 and the supporting seat 1 can relatively rotate without axial movement; the lock sleeve 116 is sleeved on the outer shell 21, a second sealing ring 117 is arranged between the lock sleeve and the outer shell 21, so that the outer shell 21 is connected and sealed with the supporting seat 1, the supporting seat 1 is used for installing a transmission shaft, a power interface and other parts for executing bending, rotation and firing, and the rest transmission components are arranged in the outer shell 21 and the outer tube 23.

For easy installation, the rear part of the lock sleeve 116 is sleeved on the supporting seat 1 and is in threaded connection with the supporting seat 1, and the front end of the lock sleeve 116 is turned inwards and is clamped on a boss arranged on the outer wall of the shell 21.

Preferably, a connecting seat 22 is coaxially arranged in the front end of the shell 21, the rear end of the outer tube 23 extends into the connecting seat 22 and is welded with the connecting seat 22, and a seal is formed between the outer wall of the connecting seat 22 and the inner wall of the shell 21.

In this example, the connection seat 22 is connected to the housing 21 by a screw 26 so as to be rotatable in synchronization, and a third seal ring 118 is provided between the outer wall of the connection seat 22 and the inner wall of the housing 21. Specifically, the third sealing ring 118 is mounted on the inner wall of the housing 21 or on the outer wall of the connecting seat 22.

In another embodiment, the connection seat 22 and the housing 21 may be connected and sealed by welding.

The sealing structure is arranged at the position where the actuating mechanism extends out of the shell 21, and in the process of operating the actuating mechanism, the sealing between the actuating mechanism and the shell 21 is realized, so that liquid is effectively prevented from entering the shell 21 from the position, a better sealing effect is achieved, and a transmission assembly in the shell 21 is protected.

Modifications and variations may be made to the above-described embodiments by those skilled in the art without departing from the spirit and scope of the invention. Accordingly, it is intended that all equivalent modifications and variations of the invention be covered by the claims, which are within the ordinary skill of the art, be within the spirit and scope of the present disclosure.

Claims

1. The utility model provides a anastomat connecting rod for connect nail casket and power handle, including the firing bar that is used for percussion nail casket, be used for driving the rotatory outer tube of nail casket, be used for pulling the crooked pull rod of nail casket, its characterized in that: the device also comprises a supporting seat, a firing transmission shaft, a rotary transmission shaft and a bending transmission shaft which are respectively and rotatably arranged in a mounting hole formed in the supporting seat; the output end of the firing transmission shaft is connected with the firing bar through a firing transmission part, and the firing bar is driven to move back and forth under the action of power; the output end of the bending transmission shaft is connected with the pull rod through a bending transmission part, and the pull rod is driven to move back and forth under the action of power; the output end of the rotary transmission shaft is connected with the outer tube through a rotary transmission part and drives the outer tube to rotate under the action of power; the bending transmission component comprises a connecting sleeve and a stirring piece for stirring the connecting sleeve, the front part of the bending transmission shaft is provided with a screw, the stirring piece is sleeved on the screw of the bending transmission shaft and is in threaded fit with the screw, the pull rod is supported on the connecting sleeve, and the bending transmission shaft drives the stirring piece, the connecting sleeve and the pull rod to move forwards and backwards under the action of power; the connecting rod further comprises an actuating mechanism for performing unlocking/locking operations when the magazine is connected to the connecting rod.

2. The stapler attachment according to claim 1, wherein: the stirring piece is of a shifting fork structure, the connecting sleeve is rotatably arranged relative to the stirring piece, and the supporting seat is provided with a guide mechanism for enabling the stirring piece to move along the axial direction of the bending transmission shaft and an auxiliary supporting mechanism for supporting the front end of the bending transmission shaft.

3. The stapler attachment according to claim 1, wherein: the connecting rod further comprises a supporting tube, the supporting tube is arranged on the supporting seat, the front portion of the firing transmission shaft is a screw rod, the firing transmission part is a threaded sleeve arranged in the supporting tube, the threaded sleeve is in threaded sleeve joint with the screw rod, the firing rod is connected with the front end of the threaded sleeve, and the firing transmission shaft drives the firing rod to move back and forth through the threaded sleeve under the action of power.

4. A stapler attachment according to claim 3, wherein: the firing transmission shaft is a stepped shaft with the middle diameter larger than the front and rear diameters, a first positioning structure and a second positioning structure for axial positioning are respectively arranged at the front and rear sides of a large-diameter section of the firing transmission shaft, and balls or end face bearings are respectively arranged between the end face of the large-diameter section and the first positioning structure and the second positioning structure.

5. The stapler attachment according to claim 1, wherein: the rotary transmission part comprises a gear, a gear ring, a shell and a connector for connecting the nail box and the outer tube, wherein the gear is arranged at the front end of the rotary transmission shaft, the shell is connected with the supporting seat and can rotate relative to the supporting seat, the gear ring is connected with the shell and meshed with the gear, the outer tube is connected with the shell, and the rotary transmission shaft drives the shell, the outer tube and the connector to rotate under the action of power through the gear and the gear ring.

6. The stapler attachment according to claim 1, wherein: the connecting rod is characterized by further comprising a supporting piece rotatably arranged on the supporting seat and a connector which is positioned in front of the supporting piece and used for being connected with the nail box, a protection tube is arranged between the connector and the supporting piece, the front end of the protection tube is connected with the connector, the rear end of the protection tube is connected with the supporting piece, and a wire used for connecting the connector and an electric element on the supporting piece is arranged in the protection tube.

7. The stapler attachment of claim 6, wherein: the support seat is provided with a contactor and an electrical interface which are connected, the contactor is provided with a plurality of contact pieces, the support piece is provided with a contact ring corresponding to the contact pieces, the contact ring is connected with the rear end of the lead, and when the support piece rotates relative to the support seat, the contact ring keeps contact with the corresponding contact pieces.

8. The stapler attachment according to claim 1, wherein: the connecting rod further comprises a shell, the front end of the shell is connected with the outer tube, the rear part of the shell is rotatably connected with the supporting seat, one part of the actuating mechanism is positioned in the shell, the other part of the actuating mechanism extends out of the shell, and a sealing structure is arranged between the part of the actuating mechanism extending out of the shell or the part penetrating through the shell and the shell.

9. The stapler attachment according to any one of claims 1-8, wherein: the utility model discloses a trigger transmission shaft, rotatory transmission shaft and crooked transmission shaft, the dead axle is used for the axial spacing is provided with in the mounting hole at the rear of each transmission shaft shoulder to be provided with the drive joint in the rear end cover of each transmission shaft to be provided with the spring between the internal flange that forms with the stop collar front end, the supporting seat rear is provided with the end cover that is used for restricting stop collar and drive joint roll-off, set up the access hole that corresponds with drive joint on the end cover.