Clamp head control assembly

Abstract

The utility model provides a forceps head control assembly of a high-frequency electrosurgical operating instrument. The high-frequency electrosurgical operating instrument comprises an end effector, an outer rod and a main body. The tong head control assembly comprises a pull rod, a wrench and a transmission mechanism, the pull rod is at least partially arranged in the outer rod, and the front end of the pull rod is in transmission connection with the tong head. According to the utility model, the arc-shaped rotating groove is in running fit with the second connecting part of the transmission mechanism, so that the movement stroke of the tong head control assembly in the control process is reduced, the overall structure is more compact, and the control of the tong head is more stable.

Description

Technical Field

[0001] The utility model relates to the field of surgical instruments, and more specifically, to a clamp head control assembly of a high-frequency electrosurgical instrument. Background Art

[0002] High-frequency electrosurgical instruments are surgical instruments used for electrocoagulation hemostasis and / or tissue cutting during surgery and have been widely used clinically. Currently, high-frequency electrosurgical instruments can be used not only in open surgeries but also in endoscopic surgeries such as laparoscopic surgeries. High-frequency electrosurgical instruments generally include two structures: a pistol type and a clamp type. Among them, the pistol-type high-frequency electrosurgical instrument usually includes a clamp with an electrode and a handle. The high-frequency electrosurgical instrument is further connected to a high-frequency generator and a foot switch through a connecting wire. By outputting high-frequency current from the high-frequency generator, the current provides high-frequency electrical energy to the collective tissue through the electrodes respectively arranged on the two clamps, dehydrating and solidifying the tissue between the two electrodes, so as to achieve the purpose of electrocoagulation hemostasis.

[0003] Currently, the pistol-type high-frequency electrosurgical instrument includes a housing, a handle assembly, a rotating assembly, and an end effector assembly, etc. In the prior art pistol-type high-frequency electrosurgical instrument, the structure of an inner push rod, an inner sleeve, and an outer sleeve is superimposed inside the barrel. Due to the small space inside the barrel, the size design of the parts inside the barrel is restricted, resulting in a reduction in the strength of the parts and a decrease in the service life of the instrument. Due to space limitations, the sealing design between parts is more difficult and may also pose a risk of air leakage, causing trouble during endoscopic surgery. Summary of the Utility Model

[0004] In order to solve the above problems of the prior art, the utility model provides a high-frequency electrosurgical instrument, which includes an end effector, an outer rod, and a main body. The main body is arranged at one end of the outer rod, and the end effector is arranged at the other end of the outer rod away from the main body. The end effector includes two clamp heads, and a clamp head control assembly is used to control the opening and closing of the two clamp heads.

[0005] The clamp head control assembly includes a pull rod, a wrench, and a transmission mechanism. At least part of the pull rod is arranged in the outer rod, and the front end of the pull rod is in transmission connection with the clamp head. The wrench includes a control part and a third connection part. At least part of the control part is located outside the main body. The third connection part includes a first bolt and an arc-shaped rotating groove. The wrench is rotatably connected to the main body through the first bolt of the third connection part, and the wrench is in transmission connection with the pull rod through the cooperation of the rotating groove and the transmission mechanism.

[0006] Preferably, the transmission mechanism includes a first transmission rod, the first transmission rod includes a second connection portion and a clamping portion, the second connection portion is provided with a second bolt and a rotating pin; the transmission rod is rotatably connected to the main body through the second bolt; the rotating pin is in transmission cooperation with the rotating groove, and the clamping portion is in rotational cooperation with the pull rod.

[0007] Preferably, the jaw control assembly further includes a first fixing sleeve, the first fixing sleeve is arranged on the pull rod, two flanges are arranged on the outer circle of the first fixing sleeve, and the clamping portion is clamped between the two flanges.

[0008] Preferably, the jaw control assembly further includes a second fixing sleeve, the first fixing sleeve is slidably connected to the pull rod in a sleeved manner, the second fixing sleeve is fixedly connected to the pull rod in a sleeved manner, and an elastic member is arranged between the first fixing sleeve and the second fixing sleeve.

[0009] Preferably, the second fixing sleeve is provided with a protruding portion, the jaw control assembly further includes a jaw reset device, the jaw reset device is sleeved on the second fixing sleeve and one end of the jaw reset device abuts against the protruding portion, and the other end of the jaw reset device abuts against the main body.

[0010] Preferably, the protruding portion divides the second fixing sleeve into a first section close to the first fixing sleeve and a second section far from the first fixing sleeve, and the jaw reset device is sleeved on the second section of the second fixing sleeve; the jaw control assembly further includes a clamping spring, one end of the jaw reset device is sleeved on the first fixing sleeve, and the other end of the clamping spring is sleeved on the first section; one end of the clamping spring abuts against one of the two flanges close to the second fixing sleeve, and the other end of the clamping spring abuts against the protruding portion.

[0011] Preferably, the stiffness coefficient of the jaw reset device is less than that of the clamping spring.

[0012] Preferably, a second limiting portion is arranged on the pull rod, and the width of the second limiting portion is greater than the inner diameter of the first fixing sleeve.

[0013] Preferably, the edges on both sides of the clamping portion are both set as smooth arc surfaces.

[0014] Preferably, the front end of the pull rod is provided with a first connection hole and a second connection hole, the jaws are provided with a third connection hole and a fourth connection hole, the first connection hole and the fourth connection hole are oblong holes, and the second connection hole and the third connection hole are round holes; the two jaws are connected to the outer rod through a first connection pin, the third connection hole and the first connection hole are movably matched through the first connection pin, and the fourth connection hole and the second connection hole are movably matched through a second connection pin.

[0015] The above technical solution of the present utility model has the following advantages compared with the prior art solution:

[0016] The present utility model provides a high-frequency electrosurgical instrument, which includes a main body, an outer rod, and an end effector. The high-frequency electrosurgical instrument of the present invention further includes a jaw control assembly. The jaw control assembly includes a wrench and a transmission mechanism. The wrench includes a control portion and a third connecting portion. The third connecting portion is provided with an arc-shaped rotating groove, and the arc-shaped rotating groove is rotationally matched with the second connecting portion of the transmission mechanism, reducing the movement stroke of the jaw control assembly during the control process, making the overall structure more compact, and also making the control of the jaws more stable. In addition, the jaw control assembly further includes a clamping spring. Through the design of the clamping spring, an appropriate clamping force can be provided and maintained. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to make the content of the present utility model easier to be clearly understood, the following further describes the present utility model in detail according to the specific embodiments of the present utility model and in conjunction with the drawings, where:

[0018] Figure 1 is a schematic diagram of the overall structure of the high-frequency electrosurgical instrument described in the present utility model;

[0019] Figure 2 is a schematic diagram of the structure of the high-frequency electrosurgical instrument described in the present utility model in the closed state of the jaws;

[0020] Figure 3 is a three-dimensional structure schematic diagram of the jaw control assembly of the high-frequency electrosurgical instrument described in the present utility model Figure 1 ;

[0021] Figure 4 is a schematic diagram of the structure of the jaw control assembly of the high-frequency electrosurgical instrument described in the present utility model;

[0022] Figure 5 is a three-dimensional structure schematic diagram of the jaw control assembly of the high-frequency electrosurgical instrument described in the present utility model Figure 2 ;

[0023] Figure 6 is an exploded view of the jaw control assembly of the high-frequency electrosurgical instrument described in the present utility model.

[0024] Wherein: 1, main body; 2, outer rod; 3, end effector; 4, pull rod; 5, wrench; 5-1, control portion; 5-2, third connecting portion; 5-3, first fixing bolt; 5-4, rotating groove; 6, first transmission rod; 6-1, fourth connecting portion; 6-2, clamping portion; 6-3, second fixing bolt; 6-4, rotating pin; 17, first fixing sleeve; 18, second fixing sleeve; 19, jaw reset device; 20, clamping spring; 21, second limiting portion; 22, first connecting hole; 23, second connecting hole; 24, third connecting hole; 25, fourth connecting hole; 26, first connecting pin; 27, second connecting pin. Detailed implementation manners

[0025] The following will describe in detail the specific implementation manners of the high-frequency electrosurgical instrument according to the present invention with reference to the accompanying drawings. The examples of the embodiments are shown in the drawings, where the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this patent and should not be construed as a limitation of this patent.

[0026] In the description of this patent, it should be understood that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing this patent and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this patent.

[0027] In the description of this patent, it should be noted that unless otherwise clearly specified and defined, the terms "installed", "connected", "connected to", "provided with" should be understood in a broad sense. For example, it can be fixedly connected and provided with, or detachably connected and provided with, or integrally connected and provided with. For those of ordinary skill in the art, the specific meanings of the above terms in this patent can be understood according to specific circumstances.

[0028] As Figure 1-2 shown, this embodiment provides a high-frequency electrosurgical instrument, including a main body 1, an outer rod 2 and an end effector 3. One end of the outer rod 2 is rotatably connected to the main body 1, and the other end of the outer rod 2 is connected to the end effector 3.

[0029] In this embodiment, the end effector 3 includes two jaws, and the two jaws can achieve large-angle rotation and opening and closing, and are used to contact tissues to achieve the functions of electrocoagulation or cutting; the main body 1 is used to accommodate a jaw control assembly and a blade control assembly for controlling the end effector 3.

[0030] As Figure 3-6 shown, the high-frequency electrosurgical instrument provided in this embodiment further includes a jaw control assembly, and the jaw control assembly is used to control the opening and closing of the two jaws to clamp tissues; the jaw control assembly includes a pull rod 4, a wrench 5, and a transmission mechanism. The pull rod 4 is partially disposed in the outer rod 2, and the front end of the pull rod 4 is in transmission connection with the jaws. The wrench 5 is in transmission connection with the pull rod 4 through the transmission mechanism.

[0031] The wrench 5 includes a control part 5-1 and a third connecting part 5-2. At least part of the control part 5-1 is located outside the main body 1. The third connecting part 5-2 includes a first fixing bolt 5-3 and an arc-shaped rotating groove 5-4. The wrench 5 is rotatably connected to the main body 1 through the first fixing bolt 5-3 of the third connecting part 5-2, and the wrench 5 is drivingly connected to the pull rod 4 through the cooperation of the rotating groove 5-4 and the transmission mechanism. In this embodiment, by arranging a transmission mechanism between the wrench 5 and the pull rod 4 instead of directly connecting the wrench 5 and the pull rod 4, the structural compactness of the jaw control assembly in the main body 1 can be greatly improved, and sufficient accommodation space is reserved for other components.

[0032] As an example, the transmission mechanism includes a first transmission rod 6. The first transmission rod 6 includes a fourth connecting part 6-1 and a clamping part 6-2. The fourth connecting part 6-1 is provided with a second fixing bolt 6-3 and a rotating pin 6-4. The first transmission rod 6 is rotatably connected to the main body 1 through the second fixing bolt 6-3. The rotating pin 6-4 is in driving cooperation with the rotating groove 5-4, and the clamping part 6-2 is in driving cooperation with the pull rod 4.

[0033] The jaw control assembly further includes a first fixing sleeve 17. The first fixing sleeve 17 is arranged on the pull rod 4. Two flanges are arranged on the outer ring of the first fixing sleeve 17. The clamping part 6-2 is clamped between the two flanges. The edges on both sides of the clamping part 6-2 are both set as smooth arc surfaces. When the wrench 5 is triggered to drive the first transmission rod 6 to rotate, the clamping part 6-2 also rotates between the two flanges.

[0034] The jaw control assembly further includes a second fixing sleeve 18. The first fixing sleeve 17 is slidably connected to the pull rod 4 in a sleeved manner. The second fixing sleeve 18 is fixedly connected to the pull rod 4 in a sleeved manner. An elastic member is arranged between the first fixing sleeve 17 and the second fixing sleeve 18. The second fixing sleeve 18 is provided with a protruding part. The jaw control assembly further includes a jaw reset device 19. The jaw reset device 19 is sleeved on the second fixing sleeve 18, and one end of the jaw reset device 19 abuts against the protruding part, and the other end of the jaw reset device 19 abuts against the main body 1.

[0035] The protruding part divides the second fixing sleeve 18 into a first section close to the first fixing sleeve 17 and a second section far from the first fixing sleeve 17. The jaw reset device 19 is sleeved on the second section of the second fixing sleeve 18.

[0036] The jaw control assembly further includes a clamping spring 20. One end of the clamping spring 20 is sleeved on the first fixing sleeve 17, and the other end of the clamping spring 20 is sleeved on the first section. One end of the clamping spring 20 abuts against one of the two flanges close to the second fixing sleeve 18, and the other end of the clamping spring 20 abuts against the protruding part.

[0037] The stiffness coefficient of the jaw reset device 19 is set to be less than that of the clamping spring 20. Therefore, when operating the wrench 5, at the beginning, only a very small force is needed to compress the jaw reset device 19, so that the two jaws can quickly close to contact the tissue; when the two jaws are closed, the applied force needs to be increased, while compressing the jaw reset device 19 and the clamping spring 20 to provide a greater clamping force, so as to clamp the tissue and prevent the tissue from shifting or detaching during the operation, further improving the safety and reliability of the operation.

[0038] A second limiting portion 21 is provided on the pull rod 4. The width of the second limiting portion 21 is greater than the inner diameter of the first fixing sleeve 17. The second limiting portion 21 is used to limit the movement stroke of the jaw control assembly.

[0039] As an example, a first connection hole 22 and a second connection hole 23 are further provided at the front end of the pull rod 4. The jaws are provided with a third connection hole 24 and a fourth connection hole 25. The first connection hole 22 and the fourth connection hole 25 are oblong holes, and the second connection hole 23 and the third connection hole 24 are round holes. The two jaws are connected to the outer rod 2 through a first connection pin 26. The third connection hole 24 and the first connection hole 22 are movably matched through the first connection pin 26, and the fourth connection hole 25 and the second connection hole 23 are movably matched through a second connection pin 27.

[0040] In this embodiment, when a downward external force is applied to the wrench 5, the first transmission rod 6 will rotate within the clamping portion 6-2, and then drive the pull rod 4 to move forward. The second connection pin 27 moves forward within the fourth connection hole 25 and the second connection hole 23, and the first connection pin 26 moves forward within the third connection hole 24 and the first connection hole 22. The jaw reset device 19 is compressed, so that the two jaws are closed; at this time, if an external force is continuously applied to the wrench 5, the clamping spring 20 will be compressed, and then an additional clamping force will be applied to the two jaws to coagulate and cut the tissue. Through the transmission cooperation between the third connection portion 5-2 and the first transmission rod 6, the movement stroke during the process of the wrench 5 controlling the jaws can be reduced, the structure is more compact, and the control performance is more stable, ensuring the safety and effectiveness of the high-frequency electrosurgical instrument. At the same time, the setting of the clamping spring 20 also enables the high-frequency electrosurgical instrument to clamp thicker tissue when encountering it, and then perform cutting and coagulation, ensuring the effectiveness of the high-frequency electrosurgical instrument.

[0041] Obviously, the above-mentioned embodiments are only examples clearly described, rather than limitations on the embodiments. For those of ordinary skill in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the embodiments here. And the obvious changes or modifications derived therefrom are still within the protection scope of the present invention.

Claims

1. A clamp head control assembly of a high-frequency electrosurgical instrument, the high-frequency electrosurgical instrument comprising an end effector, an outer rod and a main body, the main body being arranged at one end of the outer rod, the end effector being arranged at the other end of the outer rod away from the main body, the end effector comprising two clamp heads, the clamp head control assembly being used to control the opening and closing of the two clamp heads; characterized in that: The pliers head control assembly includes a pull rod, a wrench, and a transmission mechanism. The pull rod is at least partially arranged in the outer rod, and the front end of the pull rod is transmission-connected to the pliers head; the wrench includes a control part and a third connecting part. The control part is at least partially located outside the main body, and the third connecting part includes a first bolt and an arc-shaped rotating groove. The wrench is rotatably connected to the main body through the first bolt of the third connecting part, and the wrench is transmission-connected to the pull rod through the cooperation of the rotating groove and the transmission mechanism.

2. The clamp head control assembly according to claim 1, characterized in that: The transmission mechanism includes a first transmission rod, the first transmission rod includes a second connecting portion and a clamping portion, the second connecting portion is provided with a second bolt and a rotating pin; the transmission rod is rotatably connected to the main body through the second bolt; the rotating pin is transmission-matched with the rotating groove, and the clamping portion is rotationally matched with the pull rod.

3. The clamp head control assembly according to claim 2, characterized in that: The clamp head control assembly also includes a first fixing sleeve, which is arranged on the pull rod. The outer ring of the first fixing sleeve is provided with two sections of flanges, and the clamping part is clamped between the two sections of the flanges.

4. The clamp head control assembly according to claim 3, characterized in that: The clamp head control assembly also includes a second fixing sleeve, the first fixing sleeve is slidably connected to the pull rod in a sleeve manner, the second fixing sleeve is fixedly connected to the pull rod in a sleeve manner, and an elastic member is arranged between the first fixing sleeve and the second fixing sleeve.

5. The clamp head control assembly according to claim 4, characterized in that: The second fixing sleeve is provided with a protrusion, and the clamp head control assembly also includes a clamp head resetting device, which is sleeved on the second fixing sleeve and has one end abutting against the protrusion and the other end abutting against the main body.

6. The clamp head control assembly according to claim 5, characterized in that: The protrusion divides the second fixing sleeve into a first section close to the first fixing sleeve and a second section away from the first fixing sleeve, and the clamp head resetting device is sleeved on the second section of the second fixing sleeve; the clamp head control assembly also includes a clamping spring, one end of the clamp head resetting device is sleeved on the first fixing sleeve, and the other end of the clamping spring is sleeved on the first section; one end of the clamping spring abuts against one of the two flanges close to the second fixing sleeve, and the other end of the clamping spring abuts against the protrusion.

7. The clamp head control assembly according to claim 6, characterized in that: The stiffness coefficient of the clamp head resetting device is smaller than the stiffness coefficient of the clamping spring.

8. The clamp head control assembly according to claim 4, characterized in that: The pull rod is provided with a second limiting portion, and the width of the second limiting portion is greater than the inner diameter of the first fixing sleeve.

9. The clamp head control assembly according to claim 2, characterized in that: The edges on both sides of the clamping portion are both configured as smooth arc surfaces.

10. The clamp head control assembly according to claim 1, characterized in that: The front end of the pull rod is provided with a first connecting hole and a second connecting hole, and the pliers head is provided with a third connecting hole and a fourth connecting hole, the first connecting hole and the fourth connecting hole are oblong holes, and the second connecting hole and the third connecting hole are round holes; the two pliers heads are connected to the outer rod through a first connecting pin, the third connecting hole and the first connecting hole can be movably matched through the first connecting pin, and the fourth connecting hole and the second connecting hole can be movably matched through the second connecting pin.

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