Operating forceps

Abstract

The utility model discloses a pair of operating forceps which comprises a first shaft component and a second shaft component which are rotationally connected with each other, a first forceps component is arranged on the far side of the first shaft component, and a second forceps component is arranged on the far side of the second shaft component. The first forceps component and the second forceps component are matched to clamp tissue when the far side of the first shaft component and the far side of the second shaft component are close to each other; the cutting component comprises a first connecting rod, a second connecting rod, a cutter bar and at least one trigger, a protruding part is arranged on at least one side of the first connecting rod, a clamping groove is formed in the side face, facing the first connecting rod, of the trigger, and the trigger and the first connecting rod are connected in a matched mode through the protruding part and the clamping groove; one end of the second connecting rod is rotationally connected with the first connecting rod, the other end of the second connecting rod is rotationally connected with the cutter bar, and the cutter bar is slidably arranged in the first shaft component. Through the arrangement of the first connecting rod and the second connecting rod, on the premise that the movement stroke of the trigger is not changed, the cutting stroke of the cutting blade is larger, namely, the depth of the cutting blade entering the tissue is larger, so that the cutting blade can be used in more operation scenes, and the defects existing in the prior art are overcome.

Description

Technical Field

[0001] The utility model relates to the field of electrosurgical instruments, in particular to a pair of surgical forceps. Background Art

[0002] Scissors are the most commonly used surgical instruments in minimally invasive endoscopic surgery. While they cut tissue during surgery, they cannot stop bleeding, requiring specialized instruments to aid in coagulation, such as electrocoagulation forceps. Electrocoagulation forceps heat tissue by generating a high-frequency, high-voltage current at the tip of the active electrode. This current, when in contact with the body, heats the tissue, separating and coagulating it, thereby stopping bleeding.

[0003] Electrocoagulation techniques include single-stage and bipolar coagulation. Single-stage coagulation forceps have a single stage on the forceps tip, while the other stage is in contact with the body. In surgical applications, the high-frequency electrical energy has a large contact area, limiting its application to tissue separation and hemostasis. However, widespread contact with the body can have adverse effects on the heart. Bipolar coagulation uses the two tips of the bipolar electrodes to deliver high-frequency electrical energy to tissue, dehydrating and coagulating the tissue between the two electrodes to achieve hemostasis. Its action is limited to the area between the electrodes, causing much less tissue damage and impact than single-stage methods. It is suitable for tissue separation, incision, and dissection of small organs. Bipolar coagulation is primarily used in delicate surgeries such as neurosurgery, microsurgery, ENT, obstetrics and gynecology, and hand surgery.

[0004] However, existing bipolar electrocoagulation surgical equipment has a short cutting stroke and a shallow cutting depth, and is not very suitable for surgical operations requiring a long cutting stroke and a large cutting depth. Utility Model Content

[0005] The technical problem to be solved by the utility model is to overcome the deficiencies in the prior art and provide a surgical forceps.

[0006] The technical solution adopted by the present invention to solve the above problems is:

[0007] A surgical forceps comprises a first shaft member and a second shaft member rotatably connected to each other, a first jaw member is provided on the distal side of the first shaft member, and a second jaw member is provided on the distal side of the second shaft member, and the first jaw member and the second jaw member cooperate to clamp tissue when the distal side of the first shaft member and the distal side of the second shaft member approach each other; it also includes a cutting member for cutting tissue, the cutting member comprises a first connecting rod, a second connecting rod, a knife bar and at least one trigger, at least one side of the first connecting rod is provided with a protrusion, and the trigger is provided with a slot facing the side of the first connecting rod, the trigger is connected to the first connecting rod through the protrusion and the slot, one end of the second connecting rod is rotatably connected to the first connecting rod, and the other end of the second connecting rod is rotatably connected to the knife bar, and the knife bar is slidably arranged in the first shaft member.

[0008] Preferably, the ratio of the length of the first connecting rod to the length of the second connecting rod is 1:3 to 1:6, and when the distal sides of the first shaft component and the distal sides of the second shaft component approach each other, the angle between the first connecting rod and the second connecting rod is less than 45°, and the angle between the second connecting rod and the knife rod is greater than 135°.

[0009] Preferably, when the cutting blade is retracted, the angle between the first connecting rod and the second connecting rod is less than 45 degrees, and when the cutting blade is pushed out, the angle between the first connecting rod and the second connecting rod is greater than 90 degrees.

[0010] Preferably, a cutting blade is provided at the front end of the knife rod, and the cutting blade is triangular in shape. A protrusion is provided on the side of the knife rod facing the driving rod, and the knife rod and the driving rod are slidably connected through a sliding groove and the protrusion.

[0011] Preferably, a reset member is further included, which is arranged on the inner side of the first shaft member, one end of the reset member is connected to the inner side of the first shaft member, and the other end of the reset member is connected to the first connecting rod.

[0012] Preferably, the first shaft member and the second shaft member are rotatably connected to each other about a pivot axis so that the first jaw member and the second jaw member can move between an open position when the distal ends of the first shaft member and the distal ends of the second shaft member are separated from each other, and a closed position when the distal ends of the first shaft member and the distal ends of the second shaft member are close to each other.

[0013] Preferably, conductive plates are provided on opposite sides of the first jaw element and the second jaw element, and the conductive plates are used to transmit high-frequency energy to tissue when the first jaw element and the second jaw element are closed.

[0014] Preferably, at least one of the first jaw element and the second jaw element is provided with a tool channel on opposite sides thereof, so that a cutting blade can pass through at least one of the first jaw element and the second jaw element.

[0015] Preferably, at least one of the first shaft member and the second shaft member further includes a movable first locking structure, and the first connecting rod is provided with a second locking structure at one end close to the first locking structure; when the distal end of the first shaft member and the distal end of the second shaft member move away from each other, the first locking structure cooperates with the second locking structure to prevent the first connecting rod from rotating; when the distal end of the first shaft member and the distal end of the second shaft member approach each other, the first locking structure and the second locking structure are staggered.

[0016] When the user pushes the trigger, the first connecting rod and the trigger will be driven to rotate relative to each other, which will in turn drive the second connecting rod to rotate. Finally, the second connecting rod causes the knife bar to move forward and push out the cutting blade to cut the tissue. The present invention provides a first connecting rod and a second connecting rod, and through the above connecting rod driving structure, without changing the trigger movement stroke, the cutting stroke of the cutting blade is made larger, that is, the depth of penetration into the tissue is greater, and thus it can be used in more surgical scenarios, thereby solving the defects existing in the prior art.

[0017] Of course, as a further optimization scheme, the ratio of the length of the first connecting rod to the length of the second connecting rod is 1:3 to 1:6, and when the distal side of the first shaft component and the distal side of the second shaft component are close to each other, the angle between the first connecting rod and the second connecting rod is less than 45°, and the angle between the second connecting rod and the knife rod is greater than 135°, and when the cutting blade is in the retracted state, the angle between the first connecting rod and the second connecting rod is less than 45°, and when the cutting blade is in the pushed-out state, the angle between the first connecting rod and the second connecting rod is greater than 90°, and the length of the second connecting rod is much greater than the first connecting rod, thereby further improving the cutting stroke and cutting depth of the cutting blade. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 An exploded view of the structure of the surgical forceps provided by the utility model;

[0019] Figure 2 A diagram showing the cutting blade of the cutting member of the surgical forceps provided by the present invention in a retracted state;

[0020] Figure 3 This is a diagram showing the cutting blade of the cutting member of the surgical forceps provided by the present invention being pushed out;

[0021] Figure 4 An enlarged structural diagram of the first jaw member of the surgical forceps provided by the present invention;

[0022] Figure 5 This is an enlarged structural diagram of the locking structure of the surgical forceps provided by the present utility model.

[0023] Among them, 1. first axis member; 2. second axis member; 3. first jaw member; 301. conductive plate; 302. tool channel; 4. second jaw member; 5. pivot; 6. cutting member; 601. first connecting rod; 6011. second locking structure; 6012. first locking structure; 602. second connecting rod; 603. knife bar; 6031. cutting blade; 604. trigger; 605. drive rod; 6051. slide groove; 7. reset member. DETAILED DESCRIPTION

[0024] The following will describe in detail the specific embodiments of the surgical forceps of the present invention with reference to the accompanying drawings. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this patent and are not to be construed as limiting this patent.

[0025] In the description of this patent, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings. They are only for the convenience of describing this patent and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, they should not be understood as limitations of this patent.

[0026] In the description of this patent, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "connected," "connected," and "provided with" should be understood in a broad sense. For example, they can mean fixedly connected and provided with, detachably connected or provided with, or integrally connected or provided with. Those skilled in the art can understand the specific meanings of the above terms in this patent based on specific circumstances.

[0027] like Figure 1 As shown, this embodiment provides a surgical forceps, which includes a first shaft member 1 and a second shaft member 2. The first shaft member 1 and the second shaft member 2 can be rotatably connected to each other. A first jaw member 3 is provided on the distal side of the first shaft member 1, and a second jaw member 4 is provided on the distal side of the second shaft member 2. The first jaw member 3 and the second jaw member 4 cooperate to clamp tissue when the distal sides of the first shaft member 1 and the distal sides of the second shaft member 2 are close to each other. The surgical forceps provided in this embodiment also includes a cutting member 6, which includes a first connecting rod 601, a second connecting rod 602, a knife rod 603 and a trigger 604. The number of triggers 604 can be two. A protrusion is provided on the first connecting rod 601, and a groove matching the protrusion is provided on the side of the trigger 604 facing the first connecting rod 601, which is used to make the trigger 604 closely fit with the first connecting rod 601. The other end of the first connecting rod 601 away from the protrusion is rotatably connected to the second connecting rod 602, and the other end of the second connecting rod 602 is rotatably connected to the knife rod 603. The rotational connection method can be a bolt connection or a bearing or pin connection; the knife rod 603 is slidably arranged in the first shaft member 1.

[0028] like Figure 2-3As shown, as an example, the ratio of the length of the first link 601 to the length of the second link 602 is between 1:3 and 1:6, for example, it can be 1:5, 1:4 or 2:7, and when the distal side of the first shaft member 1 and the distal side of the second shaft member 2 approach each other, the angle between the first link 601 and the second link 602 is less than 45°, the angle between the second link 602 and the knife bar 603 is greater than 135°, and when the cutting blade 6031 is retracted, the angle between the first link 601 and the second link 602 is less than 45°, and when the cutting blade 6031 is pushed out, the angle between the first link 601 and the second link 602 is greater than 90°. The cutting member 6 further includes a driving rod 605, which is secured to the inner side of the first shaft member 1 via a small protrusion provided on the inner side of the first shaft member 1. A slot 6051 is further provided on the underside of the driving rod 605 for accommodating the forward and backward movement of the knife bar 603 along the driving rod 605. A cutting blade 6031 is provided at the front end of the knife bar 603. The cutting blade 6031 may be triangular or have other similar shapes that can achieve tissue cutting. A protrusion is provided on the side of the knife bar 603 facing the driving rod 605. The protrusion is secured in the slot 6051 on the underside of the driving rod 605 in a locking manner. The knife bar 603 can be slidably connected to the driving rod 605 via the protrusion.

[0029] In this embodiment, the user rotates the trigger 604, causing the first connecting rod 601 to rotate about the trigger 604. This increases the angle between the first connecting rod 601 and the second connecting rod 602, causing the second connecting rod 602 to move toward the distal end of the shaft member, thereby causing the knife bar 603 to move toward the distal end of the shaft member along the sliding groove 6051 of the driving rod 605, thereby pushing out the cutting blade 6031. By arranging the first connecting rod 601 and the second connecting rod 602 to cooperate, and the second connecting rod 602 being much longer than the first connecting rod 601, the movement distance of the knife bar 603 is increased, and the cutting depth is increased, without changing the movement range of the trigger 604.

[0030] like Figure 1 As shown, as one example, the surgical forceps further includes a reset member 7, which is disposed on the inner side of the first shaft member 1. The inner side of the first shaft member 1 is provided with a protrusion for connection to the reset member 7. One end of the reset member 7 is connected to the protrusion, and the other end is connected to the first connecting rod 601. The reset member 7 can be a spring or any other component that can achieve a reset function.

[0031] like Figure 1As shown, as one example, the first shaft member 1 and the second shaft member 2 can be rotatably connected to each other around a pivot 5, so that the first jaw member 3 and the second jaw member 4 can move between an open position when the distal ends of the first shaft member 1 and the distal ends of the second shaft member 2 are separated from each other, and a closed position when the distal ends of the first shaft member 1 and the distal ends of the second shaft member 2 are close to each other, so as to clamp tissue.

[0032] like Figure 4 As shown in the figure, as an example, conductive plates 301 are provided on opposing sides of the first jaw element 3 and the second jaw element 4. These plates are used to transmit high-frequency energy to tissue when the first and second jaw elements 3 and 4 are closed, thereby performing closed tissue treatment. The conductive plates 301 can be made of zirconium oxide or any other material that can achieve the same function. The provision of the conductive plates 301 also prevents tissue from adhering to the first and second jaw elements 3 and 4 during heating and cutting, potentially leading to decreased or damaged surgical forceps function.

[0033] like Figure 4 As shown, as one example, the first jaw element 3 and the second jaw element 4 are both provided with a tool channel 302 on opposite sides thereof, and the tool channel 302 is used to accommodate a cutting blade 6031 so that it can pass through the first jaw element 3 and the second jaw element 4. As another example, one of the first jaw element 3 and the second jaw element 4 is provided with a tool channel 302 on opposite sides thereof, for example, only the first jaw element 3 is provided with a tool channel 302 on opposite sides thereof, or only the second jaw element 4 is provided with a tool channel on opposite sides thereof.

[0034] like Figure 5 As shown, the first shaft member 1 and the second shaft member 2 also include a movable first locking structure 6012, and the first connecting rod 601 is provided with a second locking structure 6011 at one end close to the first locking structure 6012. When the distal side of the first shaft member 1 and the distal side of the second shaft member 2 move away from each other, the first locking structure 6012 and the second locking structure 6011 cooperate with each other to prevent the first connecting rod 601 from rotating. When the distal side of the first shaft member 1 and the distal side of the second shaft member 2 approach each other, the first locking structure 6012 and the second locking structure 6011 are staggered. As one example, the first locking structure 6012 can be an elastic locking tongue, and the second locking structure 6011 can be a protrusion. When the distal side of the first shaft member 1 and the distal side of the second shaft member 2 move away from each other, the locking tongue and the protrusion interfere with each other, so that the first connecting rod 601 cannot rotate. When the distal side of the first shaft member 1 and the distal side of the second shaft member 2 approach each other, the locking tongue is compressed by the second shaft member 2 and deformed, and the locking tongue and the protrusion are staggered, so that the first connecting rod 601 can rotate.

[0035] Obviously, the above embodiments are merely examples for clarity of explanation and are not intended to limit the embodiments. Those skilled in the art will appreciate that other variations or modifications can be made based on the above description. It is not necessary and impossible to enumerate all embodiments here. Obvious variations or modifications arising therefrom remain within the scope of protection of the present invention.

Claims

1. A surgical forceps comprising a first shaft member and a second shaft member rotatably connected to each other, a first jaw member being provided distally of the first shaft member, a second jaw member being provided distally of the second shaft member, the first jaw member and the second jaw member cooperating to clamp tissue when the distal ends of the first shaft member and the distal ends of the second shaft member are brought into proximity with each other; It also includes a cutting member for cutting tissue, the cutting member including a first connecting rod, a second connecting rod, a knife rod and at least one trigger, at least one side of the first connecting rod is provided with a protrusion, the trigger is provided with a slot facing the side of the first connecting rod, the trigger and the first connecting rod are connected to each other through the protrusion and the slot, one end of the second connecting rod is rotatably connected to the first connecting rod, the other end of the second connecting rod is rotatably connected to the knife rod, and the knife rod is slidably arranged in the first shaft member.

2. The surgical forceps according to claim 1, characterized in that: The ratio of the length of the first connecting rod to the length of the second connecting rod is 1:3 to 1:6, and when the distal side of the first shaft component and the distal side of the second shaft component approach each other, the angle between the first connecting rod and the second connecting rod is less than 45°, and the angle between the second connecting rod and the knife rod is greater than 135°.

3. The surgical forceps according to claim 1, characterized in that: When the cutting blade of the cutting member is retracted, the angle formed by the first connecting rod and the second connecting rod is less than 45°; when the cutting blade is pushed out, the angle formed by the first connecting rod and the second connecting rod is greater than 90°.

4. The surgical forceps according to claim 3, characterized in that: The cutting member further comprises a driving rod, which is clamped on the inner side of the first shaft member. A sliding groove is provided on the lower side of the driving rod, and the knife rod is slidably provided in the sliding groove.

5. The surgical forceps according to claim 4, characterized in that: The front end of the knife rod is provided with a cutting blade, and the cutting blade is triangular. The knife rod is provided with a protrusion on the side facing the driving rod. The knife rod and the driving rod are slidably connected with the protrusion through the sliding groove.

6. The surgical forceps according to claim 1, characterized in that: The system further includes a reset member disposed on the inner side of the first shaft member, one end of the reset member being connected to the inner side of the first shaft member, and the other end of the reset member being connected to the first connecting rod.

7. The surgical forceps according to claim 1, characterized in that: The first and second shaft members are rotatably connected to each other about a pivot axis so that the first jaw member and the second jaw member move between an open position when the distal ends of the first and second shaft members are separated from each other, and a closed position when the distal ends of the first and second shaft members are moved toward each other.

8. The surgical forceps according to claim 6, characterized in that: Conductive plates are provided on opposite sides of the first jaw element and the second jaw element, and are used to transmit high-frequency energy to the tissue when the first jaw element and the second jaw element are closed.

9. The surgical forceps according to claim 4, characterized in that: At least one of the first jaw member and the second jaw member is provided with a tool channel on opposite sides thereof, so that the cutting blade can pass through at least one of the first jaw member and the second jaw member.

10. The surgical forceps according to claim 1, characterized in that: At least one of the first shaft member and the second shaft member further includes a movable first locking structure, and the first connecting rod is provided with a second locking structure at one end close to the first locking structure; when the distal end of the first shaft member and the distal end of the second shaft member move away from each other, the first locking structure cooperates with the second locking structure to prevent the first connecting rod from rotating; when the distal end of the first shaft member and the distal end of the second shaft member approach each other, the first locking structure and the second locking structure are staggered.

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