WO2023104044A1

WO2023104044A1 - Jaw driving device for surgical instrument and surgical instrument

Info

Publication number: WO2023104044A1
Application number: PCT/CN2022/136992
Authority: WO
Inventors: 孙宝峰; 杨庆辉; 程尚卫
Original assignee: 江苏风和医疗器材股份有限公司
Priority date: 2021-12-07
Filing date: 2022-12-06
Publication date: 2023-06-15
Also published as: CN216823547U

Abstract

Provided are a jaw driving device for a surgical instrument and a surgical instrument. The jaw driving device comprises a steering member (20), a driving rod, and a driving assembly. The far end of the steering member (20) is connected to a jaw assembly (10), and the near end of the steering member (20) is provided with a first abutment surface (21) and a second abutment surface (22). The driving rod comprises a first driving rod (33) and a second driving rod (30). The driving assembly is respectively connected to the first driving rod (33) and the second driving rod (30) so as to drive the first driving rod (33) and the second driving rod (30) to tandemly move. When moving forward, the first driving rod (33) abuts against the first abutment surface (21) to push the steering member (20) to rotate in the counterclockwise direction. When moving forward, the second driving rod (30) abuts against the second abutment surface (22) to push the steering member (20) to rotate in the clockwise direction. The jaw driving device solves the problems in which a jaw driving device of an existing surgical instrument is complex in structure and large in size and thus cannot be applied to a small-diameter sleeve structure to reduce an operation puncture hole and alleviate postoperative pain in a patient.

Description

Jaw driving device for surgical instrument and surgical instrument

This application claims the priority of the patent application submitted to the State Intellectual Property Office of China on December 7, 2021, with the application number 2021230712208, and the title of the invention is "jaw driving device for surgical instruments and surgical instruments".

technical field

The present application relates to the technical field of medical instruments, in particular to a jaw driving device for surgical instruments and surgical instruments.

Background technique

Surgical cutting stapler is an instrument commonly used in medicine to replace manual suturing. The main working principle is to use a cutting knife to separate tissues and use titanium nails to anastomose tissues, similar to a stapler. According to different parts of the body, it can be divided into many kinds of staplers. For surgical cutting staplers, its working principle is to enter the patient's body through the cannula of the puncture device precisely positioned at the surgical site, and then make a longitudinal incision in the tissue and place it in the patient's body. Staples are applied to opposite sides of the incision, thereby separating and stapling the tissue.

Existing surgical cutting staplers include jaws and a jaw driving device, and the jaw driving device can drive the jaws to rotate, so that the jaws can be flexibly turned to reach different positions during surgery for patients, but at the same time, The current jaw driving device has the problems of unreasonable structural layout and large space occupation. Especially for surgical operations, the stapler needs to be inserted into the human body. The larger the diameter of the stapler sleeve, the larger the required surgical puncture hole. The greater the harm and pain caused to people, the more difficult it is to heal after surgery. Especially for lung surgery, when a large-diameter stapler sleeve is inserted into the body from the gap between two ribs, it is easy to damage the intercostal nerves, causing postoperative intercostal pain in patients.

Utility model content

In view of the deficiencies in the prior art, the present application aims to provide a jaw driving device for surgical instruments and surgical instruments, which solves the problem that the existing surgical instrument jaw driving device has a complex structure, large volume, and cannot be applied to small-diameter However, the cannula structure cannot satisfy the problem of reducing the surgical puncture hole and reducing the postoperative pain of the patient.

The present application is achieved through the following technical solutions: a jaw driving device for surgical instruments, which is used to drive the jaw assembly to turn, the jaw driving device includes a steering member, a driving rod and a driving assembly; the distal end of the steering member and the jaw The mouth assembly is connected, and the proximal end of the steering member has a first abutment surface and a second abutment surface; the drive rod includes a first drive rod and a second drive rod; the drive assembly is connected with the first drive rod and the second drive rod respectively, To drive the first drive rod and the second drive rod to move forward and backward; when the first drive rod advances, it abuts against the first abutment surface to push the steering member to rotate in the counterclockwise direction; The two abutting surfaces are abutted and matched to push the steering member to rotate clockwise.

Further, the driving assembly includes a steering knob and a transmission mechanism; the transmission mechanism is connected to the first driving rod and the second driving rod respectively, and the steering knob is operated to drive the transmission mechanism to move, thereby driving the first driving rod and the second driving rod to move forward One post exercise.

Further, the transmission mechanism includes an angle control part and a motion conversion part connected with the angle control part; the motion conversion part converts the rotational motion of the angle control part into the first drive rod and the second drive rod to move forward and backward.

Further, the motion conversion part includes two push rods, one push rod is connected with the first drive rod, and the other push rod is connected with the second drive rod, and the angle control part drives the two push rods to swing in the front and back direction, thereby driving the first drive rod The driving rod and the second driving rod move in tandem.

Further, the push rod has a first positioning end and a second positioning end, the first positioning end is connected with the angle control member, and the second positioning end is rotatably arranged on the body of the surgical instrument; when the angle control member rotates, it drives the first positioning The end swings in the forward and backward direction relative to the second positioning end.

Further, the push rod is provided with a limit hole, the first drive rod and the second drive rod both include a push part and a bending part, and the bend part is inserted in the limit hole to drive the push rod through the bend part when the push rod swings. The pushing part pushes the first abutting surface or the second abutting surface.

Further, the limiting hole is a bar-shaped hole, and when the push rod is at the initial position, the extending direction of the bar-shaped hole is perpendicular to the moving direction of the pushing part.

Further, the jaw drive device also includes: an unlocking member and a locking assembly; the unlocking member is connected to the steering knob; the locking assembly has a locking position and an unlocking position, and the unlocking member drives the locking assembly to move from the locking position under the action of the steering knob To the unlocked position, when in the locked position, the unlocking part cannot drive the angle control part; when in the unlocked position, the unlocking part can drive the angle control part to rotate.

Further, both the first driving rod and the second driving rod are circular rods.

The present application also provides a surgical instrument, including a jaw assembly and a jaw driving device, the jaw driving device is used to drive the jaw assembly to turn, and the jaw driving device is the above-mentioned jaw driving device.

Further, the surgical instrument also includes: a sleeve assembly, the proximal end of the sleeve assembly is connected to the body of the surgical instrument, and the distal end of the sleeve assembly is connected to the jaw assembly, wherein the steering member, the first drive rod and the second drive The rods are all disposed within the bushing assembly.

Further, the surgical instrument also includes: a bracket assembly, the bracket assembly is passed through the sleeve assembly; the proximal end of the bracket assembly is connected to the body, and the distal end of the bracket assembly is rotatably connected to the steering member; wherein, the two sides of the bracket assembly Limiting grooves are respectively provided so that the first driving rod and the second driving rod are respectively limited to move in the limiting grooves.

Further, the steering member is provided with a protrusion, and the bracket assembly is provided with a groove, and the protrusion is rotatably inserted into the groove, or the steering member is provided with a groove, and the bracket assembly is provided with a protrusion, and the protrusion is rotatably inserted into the groove. set in the groove.

Compared with the prior art, the beneficial effect of the present application is that: by setting two planes on the side away from the jaws of the steering member, that is, the first abutment surface and the second abutment surface, the two drive rods are parallel to each other and They are all perpendicular to the plane, and the two driving rods are set in one-to-one correspondence with the first abutment surface and the second abutment surface, and are movably arranged in the direction perpendicular to the plane. The first abutment surface and the second abutment surface The abutment surfaces are arranged on the steering piece at intervals, and are respectively located on both sides of the rotation center of the steering piece, so that the jaw driving device has a compact structure and a small volume, and can be applied to a thin-diameter casing structure, that is, the jaw The structure of the driving device can make the outer diameter of the cannula assembly smaller, thereby meeting the needs of reducing the surgical puncture hole, reducing the postoperative pain of the patient, and facilitating the postoperative recovery of the patient; especially for lung surgery, it can reduce damage to the ribs Intercostal pain can be reduced after surgery, and it is also convenient for doctors to perform surgery.

Description of drawings

Fig. 1 is a partial structural schematic diagram of a stapler provided in a specific embodiment of the present application;

Fig. 2 is a sectional view shown in Fig. 1;

Fig. 3 is an exploded view shown in Fig. 1;

Fig. 4 is a partial enlarged view shown at A place in Fig. 2;

Fig. 5 is a partial structural schematic diagram of the jaw driving device provided by the specific embodiment of the present application;

Fig. 6 is a schematic diagram of the connection between the tool holder assembly and the thimble seat of the jaw driving device provided by the specific embodiment of the present application;

Fig. 7 is a schematic structural view of the steering member of the jaw driving device provided in the specific embodiment of the present application;

Fig. 8 is a schematic diagram of cooperation between the thimble seat and the steering member of the jaw driving device provided in the specific embodiment of the present application;

Fig. 9 is a schematic diagram of the jaw structure of the stapler provided in the specific embodiment of the present application;

Fig. 10 is a schematic diagram of the connection between the jaw assembly and the jaw driving device of the stapler provided in the specific embodiment of the present application;

Fig. 11 is a schematic diagram of the connection between the driving rod and the push rod of the jaw driving device provided in the specific embodiment of the present application;

Fig. 12 is a schematic diagram of the connection between the steering member and the thimble seat of the jaw driving device provided in the specific embodiment of the present application;

Fig. 13 is a schematic diagram of the unlocking part of the jaw driving device provided in the specific embodiment of the present application;

Fig. 14 is a first cross-sectional view of the locking assembly of the jaw driving device provided in the specific embodiment of the present application;

Fig. 15 is a partial enlarged view of place B in Fig. 14;

Fig. 16 is an exploded view of part of the structure of the jaw driving device provided in the specific embodiment of the present application;

Fig. 17 is an overall schematic diagram of the stapler provided in the specific embodiment of the present application;

Fig. 18 is a second sectional view of the locking assembly of the jaw driving device provided in the specific embodiment of the present application;

Fig. 19 is a schematic diagram of the clockwise rotation of the jaws of the surgical instrument provided in the specific embodiment of the present application;

Fig. 20 is a schematic diagram of counterclockwise rotation of the jaws of the surgical instrument provided in the specific embodiment of the present application;

Fig. 21 is a schematic view of an angle control member of a surgical instrument provided in a specific embodiment of the present application;

Fig. 22 is a schematic diagram of the angle control member and the push rod of the surgical instrument provided in the specific embodiment of the present application in the first state;

Fig. 23 is a schematic diagram of the angle control member and the push rod of the surgical instrument provided in a specific embodiment of the present application in a second state.

10, jaw assembly; 101, nail bin seat; 1011, special-shaped groove; 1012, notch; 1013, connection port; 102, abutment seat; 1021, cylindrical shaft; 1 abutting surface; 22, second abutting surface; 23, protrusion; 24, pin hole; 30, second driving rod; 31, pushing part; 32, bending part; 33, first driving rod; 41, Body; 411, upper knob; 412, lower knob; 413, steering block; 4131, turning hole; 414, bushing; 42, steering knob; 43, angle control piece; 431, first groove; 44, push rod; 441 , limit hole; 442, first positioning end; 443, second positioning end; 50, locking assembly; 51, unlocking piece; 511, first rotating protrusion; 512, first pushing surface; 52, pressure spring ; 53, block block spring; 54, block block; 551, first positioning pin; 552, second positioning pin; 56, gasket; 57, screw; 60, bracket assembly; 61, concave groove; 62, Positioning key; 63, knife rest; 64, thimble seat; 71, groove; 72, square hole; 73, limit groove; 74, guard structure; 80, sleeve assembly; 81, front sleeve; 82, rear Sleeve; 83, casing head; 84, casing connecting piece.

Detailed ways

In order to make the purpose, technical solution and advantages of the present application clearer, the present application will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present application, not to limit the present application. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of this application.

It should be understood that the terms "proximal", "rear" and "distal", "anterior" as used herein are relative to the clinician manipulating the handle of the surgical instrument. The terms "proximal" and "posterior" refer to the portion closer to the clinician, and the terms "distal" and "anterior" refer to the portion away from the clinician. That is, the handle is the near side and the rear part, and the jaw assembly 10 is the far side and the front part. For example, the proximal end and rear end of a certain component represent an end relatively close to the handle, and the distal end and front end represent the end relatively close to the jaw. One end of assembly 10. The terms "upper" and "lower" refer to the relative positions of the nail anvil 102 and the cartridge holder 101 of the jaw assembly 10, specifically, the nail anvil 102 is "upper" and the staple cartridge holder 101 is "lower". However, surgical instruments can be used in many orientations and positions, so these terms expressing relative positional relationships are not limiting and absolute.

In this application, unless otherwise specified and limited, terms such as "connected" and "connected" should be interpreted in a broad sense, for example, they can be fixedly connected, detachably connected, or movably connected , or integrated; it can be directly connected or indirectly connected through an intermediary, it can be the internal communication of two elements or the interaction relationship between two elements such as butting. Those of ordinary skill in the art can understand the specific meanings of the above terms in this application according to specific situations. It should be noted that when there are qualifiers before "connected" and "connected", it has the meaning defined by the corresponding qualifiers, and only the situations that obviously need to be excluded are excluded, and other possible situations are not excluded, such as "detachably connected" Refers to the detachable connection, does not include integrated, but the movable connection is not excluded.

Please refer to Fig. 1 to Fig. 8, present embodiment provides a kind of jaw driving device, is used for driving jaw assembly 10 to turn, and jaw driving device comprises steering member 20, driving rod and driving assembly; The far end of steering member 20 Connected with the jaw assembly 10, the proximal end of the steering member 20 has a first abutment surface 21 and a second abutment surface 22; the drive rod includes a first drive rod 33 and a second drive rod 30; the drive assembly is connected to the first drive rod respectively. The rod 33 is connected with the second driving rod 30 to drive the first driving rod 33 and the second driving rod 30 to move forward and backward; when the first driving rod 33 advances, it abuts and cooperates with the first abutting surface 21 to push the steering member 20 rotates in the counterclockwise direction, and the second driving rod 30 abuts against and cooperates with the second abutting surface 22 to push the steering member 20 to rotate in the clockwise direction when it advances. The movement of the first driving rod 33 and the second driving rod 30 means that when the first driving rod 33 moves forward, the second driving rod 30 moves backward; when the second driving rod 30 moves forward, the first driving rod 30 moves forward. The driving rod 33 moves backward.

The applicable object of the jaw driving device in this embodiment is chest cavity stapler as an example, but the jaw driving device with the same structure can be applied to other surgical instruments other than chest cavity staplers that require small-diameter sleeve components . The jaw driving device includes a steering member 20 that is connected with the jaw assembly 10 and drives the jaw assembly 10 to rotate, a first drive rod 33 that can drive the rotation of the steering member 20, a second drive rod 30 and a drive assembly. The mouth assembly 10 is fixed on the steering member 20, and the rotation of the steering member 20 drives the jaw assembly 10 to rotate. In order to make the outer diameter of the stapler sleeve assembly smaller, the structure simpler and convenient for processing and connection, in this embodiment, the steering member 20, two planes are provided on the side away from the jaw assembly 10, namely the first abutting surface 21 and the second abutting surface 22, the first driving rod 33 and the second driving rod 30 are parallel to each other and are perpendicular to the above-mentioned planes, At the same time, the first driving rod 33 is set in one-to-one correspondence with the first abutting surface 21, and the second driving rod 30 is arranged in a one-to-one correspondence with the second abutting surface 22, and is movably arranged in a direction perpendicular to the above-mentioned plane. 21 and the second abutting surface 22 are disposed on the steering member 20 at intervals, and are respectively located on two sides of the rotation center of the steering member 20 . In the jaw driving device in the prior art, the far ends of the first driving rod 33 and the second driving rod 30 are provided with bending parts, and the bending parts are provided with grooves. The proximal end of the steering member is provided with a protrusion matching the groove. When the first driving rod 33 or the second driving rod 30 is pushed, the protrusion moves in the groove, thereby pushing the steering member to rotate. The whole jaw driving device structure It is complex and requires a large space layout in the bushing assembly, so it cannot adapt to the layout and design of the thin-diameter bushing. However, the first driving rod 33 and the second driving rod 30 of the present application realize steering by abutting and cooperating with the abutting surface of the steering member, without using other structures to realize the connection and driving of the driving rod and the steering member, and the structure is simple, thereby The space required by the driving rod in the radial direction is reduced, the stapler cannula assembly can be made thinner, and the injury to people during operation is reduced.

The rotation direction of the jaw assembly of the present application is as shown in FIG. 4 , counterclockwise is from top to bottom, clockwise is from bottom to top, wherein, taking the clockwise rotation of the jaw assembly 10 as an example, the above When the jaw driving device is in use, its working principle is as follows: firstly, the driving assembly drives the first driving rod 33 corresponding to the first abutting surface 21 to approach the first abutting surface 21 and pushes the first abutting surface 21 to rotate counterclockwise , at this time the entire steering member 20 rotates counterclockwise, and the second abutment surface 22 pushes the second drive rod 30 to move in the direction opposite to the moving direction of the first drive rod in contact with the first abutment surface 21; when the jaw assembly When 10 rotates clockwise, the working principle is similar to the above-mentioned counterclockwise rotation. Therefore, in the jaw drive device in this embodiment, the drive assembly pushes different drive rods to move to complete the counterclockwise or clockwise rotation of the steering member 20, and the driving The drive mode in which the rod abuts against the first abutment surface 21 or the second abutment surface 22 makes the transmission form simple and convenient, and there is no need to punch a hole on the drive rod or provide a plug-in protrusion on the steering piece 20, and the drive rod and the steering piece 20 The connection is also simple, and the processing requirements and installation requirements for the drive rod and the steering member 20 are low.

The drive assembly includes a steering knob 42 and a transmission mechanism; the transmission mechanism is connected to the first driving rod 33 and the second driving rod respectively, and the steering knob 42 is operated to drive the transmission mechanism to move, thereby driving the first driving rod 33 and the second driving rod 30 Movement in tandem.

The body 41 in this embodiment is rotatably connected to the handle of the surgical instrument, the top of the body 41 of the surgical instrument has a hole, and the steering knob 42 is rotatably arranged on the hole, and power is provided by turning the steering knob 42. The transmission mechanism acts on the drive rod to move the drive rod.

The transmission mechanism includes an angle control member 43 and a motion conversion member connected with the angle control member 43 ; the motion conversion member converts the rotational movement of the angle control member into the first driving rod 33 and the second driving rod 30 to move forward and backward. The angle control member 43 is drivably connected with the steering knob 42. Specifically, the steering knob 42 is connected with the unlocking member 51. The rotation of the steering knob 42 drives the angle control member 43 to rotate through the unlocking member 51. When the angle control member 43 rotates, it drives two push buttons. The rod 44 rotates, and the two push rods 44 are correspondingly connected with the driving rod, so as to drive the driving rod to move and realize the rotation control of the steering member 20 . The connection and driving method of the unlocking part and the angle control part will be described in detail below.

In this embodiment, the motion conversion member includes two push rods 44, one push rod 44 is connected with the first drive rod 33, the other push rod is connected with the second drive rod 30, and the angle control member 43 drives the two push rods 44 Swing along the front-back direction, thereby driving the first driving rod 33 and the second driving rod 30 to move forward and backward. The structure of the push rod 44 and the connection form with the drive rod are: the push rod 44 is provided with a limit hole 441, the first drive rod 33 and the second drive rod 30 both include a push part 31 and a bending part 32, and the bending part 32 is inserted It is provided in the limiting hole 441 to drive the pushing part 31 to push the first abutting surface 21 or the second abutting surface 22 through the bending part 32 when the push rod 44 swings. The limiting hole 441 is a bar-shaped hole, and when the push rod 44 is at the initial position, the extending direction of the bar-shaped hole is perpendicular to the moving direction of the pushing part 31 . More specifically, when located at the initial position, the push rod 44 is vertically arranged, and a limit hole 441 is provided in the middle of the push rod 44. The pushing part 31 and the bending part 32 are two parts on the driving rod, and the pushing part 31 is along the driving rod. The moving direction is extended, and the bending portion 32 is perpendicular to the pushing portion 31 . Wherein, the limit hole 441 is a bar-shaped hole, and when the push rod 44 is in the initial position, the extending direction of the bar-shaped hole is perpendicular to the moving direction of the pushing part 31, so that when the push rod 44 swings, the bending part 32 can move along the direction of the bar-shaped hole. Sliding in the extending direction to prevent the bending part 32 from getting stuck. In addition, the push rod adopts strip-shaped holes, which can prevent the push rod from being stuck when swinging, and ensure a smoother connection with the drive rod. In Fig. 4, the steering member 20 is at the initial position, the jaw assembly is at the initial position, and the push rod is also at the initial position at this time.

In addition, the push rod 44 has a first positioning end 442 and a second positioning end 443, the first positioning end 442 is connected with the angle control member 43, and the second positioning end 443 is rotatably arranged on the body 41 of the surgical instrument; the angle control member When 43 is rotated, the first positioning end 442 is driven to swing relative to the second positioning end 443 in the forward and backward direction. The first positioning end 442 is located at the top of the push rod, the second positioning end 443 is located at the bottom of the push rod 44, the limit hole 441 is located at the middle of the push rod 44, and the bottom of the angle control member 43 is provided with a first groove 431, as shown in the figure 21 and FIG. 22, the first slot 431 is a through slot that runs through the center of the bottom of the angle control member 43, and is arranged along the radial direction, and the first positioning ends 442 of the two push rods 44 are respectively installed in the first slot 431 Inside, when the angle control member 43 rotates around its own center of rotation, it will drive the first positioning ends 442 of the two push rods 44 to move one after the other through the first groove 431, wherein Fig. 22 shows the first The schematic diagram under the state, the angle control member 43 does not rotate at this moment, the schematic diagram under the second state after the angle control member 43 drives the push rod 44 to rotate a certain angle as shown in Figure 23, as can be seen from Figure 23, the first groove 431 It is a bar-shaped slot, and the first positioning end 442 of the push rod 44 moves forward and backward driven by the first slot 431 and also moves along the length direction of the first slot 431 . The second positioning end 443 of the push rod 44 is rotatably arranged on the body 41 of the surgical instrument, and can only rotate and not move. When the angle control member 43 rotates, it drives the first positioning end 442 in the first groove 431 to move , and since the second positioning end 443 only rotates but does not move, a swinging movement mode of the push rod 44 is formed.

The jaw driving device also includes: an unlocking member 51 and a locking assembly 50; the unlocking member 51 is connected to the steering knob 42; the locking assembly 50 has a locking position and an unlocking position, and the unlocking member drives the locking assembly 50 under the action of the steering knob 42 Moving from the locked position to the unlocked position, in the locked position, the unlocking member 51 cannot drive the angle control member 43; in the unlocked position, the unlocking member 51 can drive the angle control member 43 to rotate.

As shown in Figure 1, Figure 11 to Figure 17, the locking and unlocking structure of the surgical instrument jaw assembly 10 is mainly completed by the cooperation of the steering knob 42, the unlocking part 51, the angle control part 43, the locking assembly 50 and the body 41 of the surgical instrument , wherein the locking assembly 50 includes a compression spring 52, a first positioning pin 551, and a second positioning pin 552. In FIG. At the bottom, the screw 57 cooperates with the washer 56 to fix the angle control member 43 on the body 41 . The upper part of the angle control member 43 is provided with an arc-shaped groove, and the compression spring 52 is arranged in the arc-shaped groove. One end of the compression spring 52 abuts against the first positioning pin 551 , and the other end abuts against the second positioning pin 552 .

According to one embodiment, when the unlocking member 51 rotates clockwise in the direction shown in FIG. The pin 551 then moves clockwise in the space formed between the bush 414 and the angle control member 43 . As shown in Figures 2 and 14, when the locking assembly 50 is in the initial locking position, the jaw assembly 10 is subjected to a counterclockwise resistance torque from an external object such as human tissue, and the resistance torque passes through the first driving rod 33 and the second driving rod 30 is transmitted to the push rod 44, and then transmitted to the angle control member 43 by the push rod 44, and the angle control member 43 will receive a counterclockwise moment, resulting in a counterclockwise motion trend. At this time, the first positioning pin 551 (the positioning pin located at the top of FIG. 14 ) has a clockwise movement tendency relative to the angle control member 43, that is, moves toward the narrowed space formed by the angle control member 43 and the bushing 414. trend. At this time, the frictional resistance between the three is balanced with the counterclockwise resistance of the jaw assembly 10, which plays a locking role in the initial state. Likewise, when the jaw assembly 10 is subjected to the clockwise resistance torque of human tissue, it is consistent with the above-mentioned principle. When the first positioning pin 551 moves from the locked position to the preset position, that is, the unlocked position, the first pushing surface 512 on the unlocking member 51 will contact the contact surface on the angle control member 43, and the unlocking member 51 can drive the angle control Part 43 rotates. For another second positioning pin 552, when the first pushing surface 512 on the unlocking member 51 contacts the contact surface on the angle control member 43 so that the angle control member 43 moves clockwise, the second positioning pin 552 Under the action of the spring and the angle control member 43 , the rotation of the angle control member 43 relative to the bushing 414 will not be hindered, thereby realizing the unlocking function. It can be seen from the above that the angle control member 43 pushes the driving rod to complete the turning of the jaw assembly 10 . At this time, facing the direction shown in FIG. 14 , the first positioning pin 551 will be pushed against by the first rotating protrusion 511 under the unlocking member 51 and compress the compression spring 52 to transmit the force to the second positioning pin 552. Pin 552 also receives a push in the clockwise direction. When the jaw assembly 10 turns over a certain angle, the external force such as the cutting knife of the stapler will be transmitted to the angle control part 43 through the jaw assembly 10, the angle steering part 20, and the driving rod to the angle control part 43 through the force of the human tissue when the cutting knife of the stapler advances. 43 will have a movement tendency in the counterclockwise direction, and at this time, the second positioning pin 552 is still subjected to the clockwise elastic force of the spring. Therefore, at this moment, the second positioning pin 552 tends to move clockwise relative to the angle control member 43 . When the first positioning pin 551 moves clockwise relative to the angle control member 43 , it moves toward a narrowed space between the angle control member 43 and the bushing 414 . At this moment, the second positioning pin 552 is pressed by the angle control member 43 and the bushing 414 , so that when the angle control member 43 rotates relative to the bushing 414 , it is damped by the second positioning pin 552 , and the locking function of the jaw assembly 10 is realized. The above is as shown in Figure 14, the unlocking of the steering knob 42 moving clockwise and the principle of locking after the jaw assembly 10 turns clockwise through a certain angle, and the principle of unlocking and locking counterclockwise is the same.

When the turning knob 42 of the stapler rotates clockwise or counterclockwise, when it drives the jaw assembly 10 to rotate through the above-mentioned series of transmission mechanisms, every time the jaw assembly 10 returns to its original position, a metal impact will occur The sound prompts the user to return the jaw assembly 10 to its original position. As shown in FIG. 18 , this function is realized by the angle control member 43 , the stop block 54 , the stop block spring 53 , and the bush 414 embedded in the upper knob 411 . The specific implementation principle is, as shown in Figure 18, one end of the stop block 54 is provided with a stop block ball head, and the other end is a cylinder, the diameter of the stop block ball head is greater than the diameter of the cylinder, and the cylinder is packed into the stop block spring 53, And pack in the circular hole of angle control member 43. The stop block spring 53 is sheathed on the cylinder, one end of which abuts against the ball head of the stop block, and the other end abuts against the bottom wall of the round hole of the angle control member 43 . Then, the above-mentioned angle control member 43 is loaded into the bushing 414 embedded in the upper knob 411 together with the loaded stop block 54 and the stop block spring 53 . It is worth noting that the bushing 414 has a dimple on its inner wall. Moreover, the pits are symmetrically distributed on the symmetry line of the upper knob 411 . It can be seen that when the steering knob 42 drives the angle control member 43 to rotate relative to the bushing 414, the stop block 54 installed in the angle control member 43 will also slide along the inner wall. During the process, the stop block 54 is always in contact with the inner wall of the bushing 414 . When the ball head of the gear block on the gear block 54 is transferred to the pit of the bushing 414, under the action of the spring 53 of the gear block, the ball head of the gear block 54 is pushed into the pit of the bushing 414 to generate A sound of metal impact is used to indicate that the jaw assembly 10 returns to the initial position at this time, that is, the axis of the jaw assembly is coaxial with the axis of the driving rod or sleeve assembly.

The first drive rod 33 and the second drive rod 30 are preferably circular rods, which are more compact in structure, and the volume of the circular rods can be set smaller under the same bending strength, and occupy more space when installed in the sleeve assembly. Smaller space, so that the radius of the bushing assembly can be made smaller. In addition, the first driving rod 33 and the second driving rod 30 can also adopt square rods and other polygonal prism rods.

As shown in Fig. 1, Fig. 17, Fig. 19 and Fig. 20, the present application also provides a stapler, which is a chest stapler, including a jaw assembly 10 and a jaw driving device, the jaw driving device is used for The jaw assembly 10 is driven to rotate, and the jaw driving device is the above-mentioned jaw driving device. Wherein, the jaw assembly 10 is composed of a staple cartridge seat 101 and an anvil seat 102, and the stapler also includes a spring pin 103, a thimble seat 64, a bracket assembly 60, a sleeve assembly 80, and a sleeve connecting piece 84, and the bracket assembly 60 is fixed on On the body 41 of the surgical instrument of the jaw driving device; wherein, the jaw assembly 10 is rotatably connected to the bracket assembly 60 through the steering member 20 of the jaw driving device.

Surgical instrument also comprises bracket assembly 60, and bracket assembly 60 is worn in the casing assembly 80; The proximal end of bracket assembly is connected with body 41, and the distal end of bracket assembly is rotatably connected with steering member 20; Wherein, bracket assembly 60 Limiting grooves 73 are respectively provided on both sides, so that the first driving rod 33 and the second driving rod 30 are respectively limited to move in the limiting grooves 73 .

The bracket assembly 60 includes a knife rest 63 and a thimble seat 64. The knife rest 63 is connected with the body, and the thimble seat 64 is rotatably connected with the steering member. The materials are different. The thimble seat 64 is made of wear-resistant materials. Two concave grooves 61 are arranged symmetrically on both sides of the knife rest 63. The driving rods are respectively placed in the left and right concave grooves 61 of the knife rest 63. In addition to the positioning key 62, the thimble seat 64 is provided with a square hole 72 and two limiting grooves 73 correspondingly. The square hole 72 is assembled into the positioning key 62 on the tool holder 63, and the two limiting grooves 73 cooperate with the driving rod for limiting. There is no relative movement after the thimble seat 64 and the knife rest 63 are connected through the above-mentioned key hole, and the driving rod is limited in the limiting groove so that it can only move radially. In addition, guard structures 74 are provided on the left and right sides of the thimble seat 64 to limit the radial deformation of the driving rod during movement, so as to enhance the transmission rigidity of the driving rod. The tool rest 63, the thimble seat 64 and the left and right driving rod assemblies are shown in FIG. 6 .

As shown in FIG. 7 , the steering member 20 is provided with a protrusion 23 . As shown in FIGS. 5 and 6 , the bracket assembly 60 is provided with a groove 71 , and the protrusion 23 is rotatably inserted into the groove 71 . According to another embodiment, the steering member 20 is provided with a groove 71 , the bracket assembly 60 is provided with a protrusion 23 , and the protrusion 23 is rotatably inserted into the groove 71 . More specifically, the steering member 20 is assembled on the completed body of FIG. 6 to form the completed body of FIG. 8. As shown in FIG. In order to carry out rotary motion on the thimble seat 64. Wherein, the first abutting surface 21 and the second abutting surface 22 on the steering member 20 are respectively located on opposite sides of the protrusion 23 , and the first driving rod 33 and the second driving rod 30 are respectively located on two sides of the thimble seat 64 .

As shown in FIG. 5 and FIG. 7 , a protrusion 23 is provided on the steering member 20 , and the same abutting surfaces are provided on both sides of the axis line, ie, the above-mentioned first abutting surface 21 and second abutting surface 22 . In addition, the steering member 20 is also provided with a pin hole 24 . As shown in FIG. 9 , a notch 1012 and a special-shaped groove 1011 are provided on the cartridge seat 101 , corresponding to a cylindrical shaft 1021 provided on the anvil seat 102 . The cylindrical shaft 1021 on the nail anvil 102 is inserted into the notch 1012 of the nail cartridge base 101 and snapped into its shaped groove 1011 , forming part of the jaw assembly 10 . In this jaw assembly 10, a circular connection port 1013 is also provided on the staple cartridge seat 101. After the connection port 1013 is aligned with the pin hole 24 provided on the above-mentioned steering member 20, the spring pin 103 is inserted and fixedly connected. The assembly of the jaw assembly 10 to the steering member 20 is shown in FIG. 10 .

FIG. 11 is a connection relation diagram of the driving system on the right side viewed from the direction facing the jaw assembly 10, and the left side thereof is symmetrically arranged along the vertical center plane. The body of the surgical instrument is also fixed with a steering block 413, which is used to cooperate with the push rod, wherein the end of the second driving rod 30 is bent in an L shape to form the bending part 32, and the middle part of the push rod 44 The strip-shaped hole adopts a waist-shaped hole, and the strip-shaped hole penetrates into the L-shaped bending part 32 at the end of the second driving rod 30, and the second positioning end 443 of the push rod 44 is also bent, and the turning block 413 is put into the bent part. In the revolving hole 4131, the push rod 44 can rotate around it, the first positioning end 442 of the push rod 44 is inserted into the first groove 431 in the angle control part 43, and the angle control part 43 is connected with the steering knob 42, so when the power source acts When turning to the knob 42, the angle control member 43 pushes or pulls the push rod 44 to rotate around its rotation center axis through the first groove 431, and its waist-shaped hole pushes or pulls the second driving rod 30L-shaped bending part 32 to move forward or backward. Referring to FIG. 4 , at this moment, the driving rod will push or release the corresponding abutting surface on the steering member 20 through the pushing portion 31 of the head. As shown in Figure 4 and Figure 11, when the steering knob is turned by force, if the first drive rod 33 advances to push against the rotation of the steering member 20, the second drive rod 30 will be connected to the first drive rod 33 under the linkage mechanism. Retreat in the opposite direction at a constant speed, releasing the space for the steering member 20 to rotate. Similarly, if the second driving rod 30 advances to push against the rotation of the steering member 20, the first driving rod 33 will retreat in the opposite direction at the same speed as the second driving rod 30 under the linkage mechanism, releasing the space for the steering member 20 to rotate. , thereby realizing the turning function of the steering member 20 and the jaw assembly 10 . As shown in FIG. 12 , the thimble seat 64 is also provided with a limiting surface that limits the rotation limit angle of the angle steering member 20 , which has an angular range space of 40 degrees on both sides of the initial position of the steering member 20 . Therefore, the maximum movable angle of the jaw assembly 10 is 40 degrees in one direction, wherein the maximum movable angle of the jaw assembly can be adaptively changed to 60°, 45°, 30°, etc. according to the needs of the operation.

The surgical instrument also includes a sleeve assembly 80, the proximal end of the sleeve assembly 80 is connected to the body 41 of the surgical instrument, and the distal end of the sleeve assembly 80 is connected to the jaw assembly 10, wherein the steering member 20, the first driving rod 33 and The second drive rod 30 is all arranged in the sleeve assembly 80, as shown in Figure 1, the sleeve assembly includes a rear sleeve 82, a sleeve head 83, a front sleeve 81 and a sleeve connecting piece 84, on the entire transmission system After the casing assembly is inserted, the upper knob 411 and the lower knob 412 are fixedly assembled. The front casing is connected with the rear casing through the casing head 83, and the front casing is connected with the casing head through two symmetrical casing connecting pieces. outside of the drive rod.

To sum up, the jaw driving device in this embodiment adopts a motion form in which the driving rod and the steering member push against each other, so that the structure of the entire jaw driving device can be made more compact, which is conducive to reducing the volume and reducing the impact on the human body. harm.

It should be understood that although this description is described according to implementation modes, not each implementation mode only contains an independent technical solution, and this description in the description is only for clarity, and those skilled in the art should take the description as a whole, and each The technical solutions in the embodiments can also be properly combined to form other embodiments that can be understood by those skilled in the art.

The series of detailed descriptions listed above are only specific descriptions of the feasible implementation modes of the application, and they are not intended to limit the protection scope of the application. Any equivalent implementation mode or All changes should be included within the scope of protection of this application.

Claims

A jaw driving device for a surgical instrument, which is used to drive a jaw assembly (10) to turn, is characterized in that, the jaw driving device includes a steering member (20), a driving rod and a driving assembly; the steering The distal end of the member (20) is connected with the jaw assembly (10), and the proximal end of the steering member (20) has a first abutment surface (21) and a second abutment surface (22); the driving The rod includes a first driving rod (33) and a second driving rod (30); the driving assembly is respectively connected with the first driving rod (33) and the second driving rod (30) to drive the first driving rod (33) and the second driving rod (30). A driving rod (33) and the second driving rod (30) move forward and backward; when the first driving rod (33) advances, it abuts and cooperates with the first abutting surface (21) to push the The steering member (20) rotates in the counterclockwise direction, and the second driving rod (30) abuts and cooperates with the second abutment surface (22) when advancing to push the steering member (20) in the clockwise direction turn.
The jaw drive device for surgical instruments according to claim 1, wherein the drive assembly includes a steering knob (42) and a transmission mechanism; the transmission mechanism is connected to the first drive rod (33) respectively. Connected with the second drive rod, the steering knob (42) is operated to drive the transmission mechanism to move, thereby driving the first drive rod (33) and the second drive rod (30) one after the other post exercise.
The jaw driving device for surgical instruments according to claim 2, characterized in that, the transmission mechanism includes an angle control member (43) and a motion conversion member connected with the angle control member (43); The motion converting part converts the rotational motion of the angle control part (43) into the forward and backward motion of the first driving rod (33) and the second driving rod (30).
The jaw driving device for surgical instruments according to claim 3, characterized in that, the motion conversion member comprises two push rods (44), one push rod (44) and the first drive rod (33) is connected, another said push rod (44) is connected with said second driving rod (30), and said angle control part (43) drives two said push rods (44) to swing along the front and back directions, thereby Drive the first drive rod (33) and the second drive rod (30) to move in tandem.
The jaw driving device for surgical instruments according to claim 4, characterized in that, the push rod (44) has a first positioning end (442) and a second positioning end (443), and the first positioning end The end (442) is connected with the angle control part (43), and the second positioning end (443) is rotatably arranged on the body (41) of the surgical instrument; when the angle control part (43) rotates, it drives the The first positioning end (442) swings relative to the second positioning end (443) in a front-rear direction.
The jaw driving device for surgical instruments according to claim 4, characterized in that, the push rod (44) is provided with a limiting hole (441), and the first driving rod (33) and the second driving rod (33) The driving rods (30) each include a pushing portion (31) and a bending portion (32), and the bending portion (32) is inserted in the limiting hole (441) so that the push rod (44) When swinging, the pushing part (31) is driven by the bending part (32) to push the first abutting surface (21) or the second abutting surface (22).
The jaw driving device for surgical instruments according to claim 6, wherein the limiting hole (441) is a bar-shaped hole, and when the push rod is in the initial position, the extension of the bar-shaped hole The direction is perpendicular to the moving direction of the pushing part (31).
The jaw driving device for surgical instruments according to claim 3, characterized in that, the jaw driving device further comprises: an unlocking member (51) and a locking assembly (50); the unlocking member (51) It is connected with the steering knob (42); the locking assembly (50) has a locking position and an unlocking position, and the unlocking member (51) drives the locking assembly ( 50) Move from the locked position to the unlocked position, when in the locked position, the unlocking member (51) cannot drive the angle control member (43); when in the unlocked position, the unlocking member (51) can drive the angle control member (43) to rotate.
The jaw driving device for surgical instruments according to claim 1, characterized in that, both the first driving rod (33) and the second driving rod (30) are circular rods.
A surgical instrument, comprising a jaw assembly (10) and a jaw driving device, the jaw driving device is used to drive the jaw assembly (10) to turn, it is characterized in that the jaw driving device is the The jaw driving device described in any one of 1 to 9.
The surgical instrument of claim 10, further comprising:

A sleeve assembly (80), the proximal end of the sleeve assembly (80) is connected to the body (41) of the surgical instrument, and the distal end of the sleeve assembly (80) is connected to the jaw assembly (10), Wherein, the steering member (20), the first driving rod (33) and the second driving rod (30) are all arranged in the bushing assembly (80).
The surgical instrument of claim 11, further comprising:

A bracket assembly (60), the bracket assembly (60) is penetrated in the sleeve assembly (80); the proximal end of the bracket assembly is connected to the body (41), and the far end of the bracket assembly is connected to the The steering member (20) is rotatably connected; wherein, both sides of the bracket assembly (60) are respectively provided with limiting grooves (73), so that the first driving rod (33) and the second driving rod The rods (30) are respectively limited to move in the limit slots (73).
The surgical instrument according to claim 12, characterized in that, the steering member (20) is provided with a protrusion (23), the bracket assembly (60) is provided with a groove (71), and the protrusion (23 ) is rotatably inserted in the groove (71), or the steering member (20) is provided with a groove (71), and the bracket assembly (60) is provided with a protrusion (23), the protrusion The jack (23) is rotatably inserted in the groove (71).