Blade control assembly

Abstract

The utility model provides a blade control assembly of a high-frequency electrosurgical operating instrument. The high-frequency electrosurgical operating instrument comprises a main body, an outer rod and an end effector, the blade control assembly comprises a trigger, a push rod and a cutter push rod. The push rod is arranged to be L-shaped, and the push rod is matched with the connecting rod set, so that the movement stroke of the trigger can be reduced in the using process, the control performance is more stable, meanwhile, the overall structure is more compact, and a space is provided for containing other parts in the main body; and the safety and the effectiveness of the high-frequency electrosurgical operating instrument are ensured.

Description

Technical Field

[0001] The utility model relates to the field of surgical instruments, and more specifically, to a blade 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. At present, high-frequency electrosurgical instruments can be used not only in open surgeries but also in laparoscopic surgeries and other endoscopic surgeries. High-frequency electrosurgical instruments generally include two structures: a pistol-type and a forceps-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, a foot switch, etc. 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] At present, the pistol-type high-frequency electrosurgical instrument includes a housing, a handle assembly, a rotating assembly, an end effector, etc. In the pistol-type high-frequency electrosurgical instrument in the prior art, the structure of an inner push rod, an inner sleeve tube, and an outer sleeve tube 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, which will also cause the risk of air leakage and cause trouble during endoscopic surgery. Summary of the Utility Model

[0004] In order to solve the above problems in the prior art, the utility model provides a high-frequency electrosurgical instrument, which includes a main body, an outer rod, and an end effector. 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 far from the handle. The end effector is used to process tissues.

[0005] A blade control assembly is also provided, which includes a trigger, a push rod, and a blade push rod.

[0006] At least a part of the blade push rod is arranged inside the main body and at least a part is arranged inside the outer rod; one end of the blade push rod close to the main body is connected to the push rod, and a cutting blade is arranged at the other end of the blade push rod far from the main body. The cutting blade is configured to cut tissues.

[0007] The push rod is arranged inside the main body, and the push rod is provided with at least a first connecting part parallel to the push rod, the axis of the first connecting part is staggered with the axis of the push rod, and the trigger is transmission connected to the first connecting part through a connecting rod group to drive the cutting blade to move along the axial direction of the push rod; the connecting rod group includes at least two connecting rods hinged to each other.

[0008] Furthermore, the push rod is configured to be L-shaped, including a first connection portion, and a second connection portion that is perpendicular to the push rod and connected to the first connection portion; the second connection portion is detachably connected to the push rod via a mounting pin.

[0009] Furthermore, the blade control assembly also includes a blade resetting device, which is sleeved on the blade pushing rod, and one end of the blade resetting device away from the cutting blade cooperates with the second connecting portion.

[0010] Furthermore, a sliding groove parallel to the pusher rod is opened inside the main body, and at least one pin is provided on the first connecting portion, and is slidably connected to the inside of the main body through the cooperation of the pin sliding groove.

[0011] Furthermore, the connecting rod group includes a first connecting rod and a second connecting rod, one end of the second connecting rod is hinged to the first connecting rod, and the other end of the second connecting rod is hinged to the push rod; a U-shaped groove is provided at one end of the first connecting rod, and the first connecting part can be accommodated in the U-shaped groove.

[0012] Furthermore, the second connecting rod is hinged to the U-shaped groove through a first fixing pin, and the first connecting rod is rotatably connected to the main body through the second fixing pin.

[0013] Furthermore, one end of the second connecting rod away from the first connecting rod is rotatably connected to the push rod through a third fixing pin, and the second connecting rod is used to drive the push rod to translate.

[0014] Furthermore, the trigger is slidably disposed on the main body, and can push one end of the first connecting rod away from the U-shaped groove during sliding, so as to drive the first connecting rod to rotate around the second fixing pin.

[0015] Furthermore, a first limiting portion and a driving portion are provided on the trigger, a limiting groove arranged parallel to the knife pushing rod is opened on the main body, and the trigger is slidably arranged on the main body through the cooperation of the first limiting portion and the limiting groove; the driving portion contacts the first connecting rod to push the first connecting rod away from one end of the U-shaped groove.

[0016] Furthermore, the cutting blade is configured as a structure with a hollow middle portion, and the cutting blade is a flexible structure.

[0017] Compared with the prior art solutions, the above technical solution of the utility model has the following advantages:

[0018] A high-frequency electrosurgical instrument provided by the present utility model includes a main body, an outer rod, and an end effector. The end effector includes two jaws; it further includes a blade control assembly for controlling the telescopic movement of a cutting blade to cut tissue. The blade control assembly includes a push rod and a linkage group. The push rod is arranged in an L shape. The linkage group includes a first link and a second link. The first link is connected to a trigger, and the second link is connected to the push rod. When the trigger is pulled, it drives the first link to rotate, and then drives the second link to rotate. The second link drives the push rod forward to push out the cutting blade to cut the tissue. By arranging the linkage group in a manner of cooperation between the first link and the second link, the structure of the blade control assembly is made more compact, and the control of the cutting blade is more stable. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] 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 specific embodiments of the present utility model and in conjunction with the drawings, where:

[0020] Figure 1 is a schematic diagram of the overall structure of the high-frequency electrosurgical instrument described in the present utility model;

[0021] Figure 2 is a schematic diagram of the structure of the high-frequency electrosurgical instrument in the state where the blade is pushed out;

[0022] Figure 3 is a schematic diagram of the structure of the blade control assembly of the high-frequency electrosurgical instrument described in the present utility model;

[0023] Figure 4 is a schematic diagram of the structure of the blade control assembly of the high-frequency electrosurgical instrument in the state where the blade is pushed out;

[0024] Figure 5 is a schematic diagram of the structure of the first link of the high-frequency electrosurgical instrument described in the present utility model.

[0025] Among them, 1, main body; 2, outer rod; 3, end effector; 7, trigger; 8, push rod; 8-1, first connection part; 8-2, second connection part; 9, push rod for the blade; 10, cutting blade; 11, blade reset device; 12, first link; 12-1, U-shaped groove; 13, second link; 14, first fixing pin; 15, second fixing pin; 16, third fixing pin. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0026] The specific embodiments of the high-frequency electrosurgical instrument of the present utility model will be described in detail below with reference to the accompanying drawings. Examples of the embodiments are shown in the drawings, where the same or similar reference numerals represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by reference to the drawings are exemplary and are only used to explain the present patent and should not be construed as a limitation of the present patent.

[0027] In the description of the present patent, it should be understood that the orientation or positional relationships indicated by the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. are based on the orientation or positional relationships shown in the drawings, and are only for the convenience of describing the present 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 the present patent.

[0028] In the description of the present 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 the present patent can be understood according to specific circumstances.

[0029] 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.

[0030] 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 the tissue to achieve the functions of electrocoagulation or cutting; the main body 1 is used to accommodate a jaw control component and a blade control component for controlling the end effector 3.

[0031] As Figure 3-4As shown, a high-frequency electrosurgical instrument provided in this embodiment includes a blade control assembly, which includes a trigger 7, a push rod 8 and a push rod 9. A part of the push rod 9 is arranged in the main body 1, and the other part is arranged in the outer rod 2. The end of the push rod 9 close to the main body 1 is connected to the push rod 8, and the end of the push rod 9 away from the main body 1 is provided with a cutting blade 10. The cutting blade 10 can be set as a hollow structure in the middle, and the cutting blade 10 can be a flexible structure, or the cutting blade 10 is at least partially made of flexible material, and the cutting blade 10 is used to cut tissue. In this embodiment, setting the cutting blade 10 as a hollow structure in the middle can effectively avoid the adhesion between the tissue and the cutting blade 10 when the cutting blade 10 cuts the tissue, which can ensure the effectiveness and safety of the high-frequency electrosurgical instrument of the utility model for surgery; at the same time, setting the cutting blade 10 as a flexible structure also ensures that the cutting blade 10 can slide in the blade channel set in the end effector 3, especially when the blade channel is set in a curved shape, the cutting blade 10 with a flexible structure is easier to slide along the blade channel.

[0032] The push rod 8 is arranged inside the main body 1, and the push rod 8 is arranged in an L shape, including a first connection part 8-1, the first connection part 8-1 is arranged parallel to the push rod 9, and the axis of the first connection part 8-1 is staggered with the axis of the push rod 9; the trigger 7 is connected to the first connection part 8-1 through a connecting rod group to drive the cutting blade 10 to move along the axis direction of the push rod 9; the push rod 8 also includes a second connection part 8-2, the second connection part 8-2 is perpendicular to the push rod 9 and connected to the first connection part 8-1, and the second connection part 8-2 is detachably connected to the push rod 9 through a mounting pin. As an example, a positioning pin can be provided on the push rod 8, and the positioning pin is used to cooperate with the positioning groove provided on the main body 1, so that the push rod 8 can slide along the direction in which the positioning groove extends, thereby driving the push rod 9 to move along the axis direction of the push rod 9.

[0033] As an example, the connecting rod group may include a first connecting rod 12 and a second connecting rod 13 which are hinged to each other, wherein one end of the second connecting rod 13 is hinged to the first connecting rod 12, and the other end of the second connecting rod 13 is hinged to the push rod 8; a U-shaped groove 12-1 is provided at one end of the first connecting rod 12, and the first connecting portion 8-1 is accommodated in the U-shaped groove 12-1; the second connecting rod 13 is hinged to the U-shaped groove 12-1 through a first fixing pin 14, and the first connecting rod 12 is rotatably connected to the main body through a second fixing pin 15, and one end of the second connecting rod 13 away from the first connecting rod 12 is rotatably connected to the push rod 8 through a third fixing pin 16, and the second connecting rod 13 is used to drive the push rod 8 to translate.

[0034] In this example, refer to Figure 5Under the transmission action of the first connecting rod 12 and the second connecting rod 13, the displacement of one end of the second connecting rod 13 hinged to the first connecting rod 12 in a direction perpendicular to the axis of the push rod 9 offsets the displacement of one end of the first connecting rod 12 hinged to the second connecting rod 13 in a direction perpendicular to the axis of the push rod 9 when the first connecting rod 12 rotates around the second fixed pin, that is, when the second connecting rod 13 pulls / pushes the push rod 8 to move, the second connecting rod 13 is roughly arranged parallel to the push rod 8, so that the push rod 8 is almost only subjected to the force along the axial direction of the first connecting part 8-1, so that the push rod 8 is more stable when moving, and then the push rod 9 connected to the push rod 8 is more stable when moving, further improving the safety and stability of the operation.

[0035] The blade control assembly also includes a blade resetting device 11, which is sleeved on the push blade rod 9, and the end of the blade resetting device 11 away from the cutting blade 10 cooperates with the second connecting part 8-2; a sliding groove parallel to the push blade rod 9 is opened inside the main body 1, and a pin is provided on the first connecting part 8-1, and is slidably connected to the inside of the main body 1 through the cooperation of the pin and the sliding groove.

[0036] The trigger 7 is slidably disposed on the main body 1, and can move the end of the first connecting rod 12 away from the U-shaped groove 12-1 during sliding, so as to drive the first connecting rod 12 to rotate around the second fixing pin 15. As an example, the trigger 7 is provided with a first limiting portion and a driving portion, and the main body 1 is provided with a limiting groove arranged parallel to the pusher rod 9. The trigger 7 is slidably disposed on the main body 1 through the cooperation of the first limiting portion and the limiting groove, and the driving portion contacts the first connecting rod 12 to move the end of the first connecting rod 12 away from the U-shaped groove 12-1.

[0037] In this embodiment, pulling the trigger 7 and compressing the blade reset device 11 can drive the first connecting rod 12 to rotate around the first fixing pin 14, thereby driving the second connecting rod 13 to move forward, and further driving the first connecting portion 8-1 of the push rod 8 to move forward, so that the push rod 9 extends outward, so that the cutting blade 10 can cut the tissue, and after the tissue is cut, the trigger 7 is released, and the push rod 8 can return to its original position under the action of the elastic potential energy of the blade reset device 11 to retract the cutting blade 10. By providing an L-shaped push rod 8 and the mutually hinged first connecting rod 12 and second connecting rod 13, the overall structure is made more compact, the movement stroke of the trigger 7 is reduced, and the stability of the movement process is ensured, thereby ensuring the safety and effectiveness of the high-frequency electrosurgical surgical instrument.

[0038] Obviously, the above-described embodiments are merely examples for clear illustration and not 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 enumerate all the embodiments here. And the obvious changes or modifications derived therefrom are still within the protection scope of this utility model creation.

Claims

1. A blade control assembly of a high-frequency electrosurgical instrument, the high-frequency electrosurgical instrument comprising a main body, an outer rod and an end effector, 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 a handle, and the end effector being used for processing tissue; It is characterized in that The blade control assembly includes a trigger, a push rod and a blade push rod; At least a portion of the pusher rod is disposed inside the main body, and at least a portion of the pusher rod is disposed inside the outer rod; one end of the pusher rod close to the main body is connected to the pusher rod, and the other end of the pusher rod away from the main body is provided with a cutting blade, and the cutting blade is configured to cut tissue; The push rod is arranged inside the main body, and the push rod is provided with at least a first connecting part parallel to the push rod, the axis of the first connecting part is staggered with the axis of the push rod, and the trigger is transmission connected to the first connecting part through a connecting rod group to drive the cutting blade to move along the axial direction of the push rod; the connecting rod group includes at least two connecting rods hinged to each other.

2. The blade control assembly according to claim 1, characterized in that: The push rod is configured to be L-shaped, and includes the first connection portion, and a second connection portion that is perpendicular to the push rod and connected to the first connection portion; the second connection portion is detachably connected to the push rod via a mounting pin.

3. The blade control assembly according to claim 2, characterized in that: The blade control assembly further comprises a blade resetting device, which is sleeved on the blade pushing rod, and one end of the blade resetting device away from the cutting blade cooperates with the second connecting portion.

4. The blade control assembly according to claim 2, characterized in that: A sliding groove parallel to the knife-pushing rod is provided inside the main body, and at least one pin is provided on the first connecting portion, and the first connecting portion is slidably connected to the inside of the main body through the cooperation between the pin and the sliding groove.

5. The blade control assembly according to claim 4, characterized in that: The connecting rod group includes a first connecting rod and a second connecting rod, one end of the second connecting rod is hinged to the first connecting rod, and the other end of the second connecting rod is hinged to the push rod; a U-shaped groove is provided at one end of the first connecting rod, and the first connecting part can be accommodated in the U-shaped groove.

6. The blade control assembly according to claim 5, characterized in that: The second connecting rod is hinged to the U-shaped groove through a first fixing pin, and the first connecting rod is rotatably connected to the main body through a second fixing pin.

7. The blade control assembly according to claim 6, characterized in that: One end of the second connecting rod away from the first connecting rod is rotatably connected to the push rod through a third fixing pin, and the second connecting rod is used to drive the push rod to translate.

8. The blade control assembly according to claim 7, characterized in that: The trigger is slidably disposed on the main body, and can push one end of the first connecting rod away from the U-shaped groove during sliding, so as to drive the first connecting rod to rotate around the second fixing pin.

9. The blade control assembly according to claim 8, characterized in that: The trigger is provided with a first limiting portion and a driving portion, the main body is provided with a limiting groove arranged parallel to the knife pushing rod, and the trigger is slidably arranged on the main body through the cooperation of the first limiting portion and the limiting groove; the driving portion contacts the first connecting rod to push the first connecting rod away from one end of the U-shaped groove.

10. The blade control assembly according to claim 1, 2 or 3, characterized in that: The cutting blade is configured as a structure with a hollow middle portion, and the cutting blade is a flexible structure.

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