End effector of surgical instrument and electrosurgical instrument

Abstract

The end effector of the surgical instrument and the electrosurgical operating instrument comprise two forceps heads, the two forceps heads are connected through a master pin, a first state in which the two forceps heads are oppositely attached and a second state in which the two forceps heads are oppositely separated are arranged between the two forceps heads, and the first state is used for clamping tissue. And in the two tong heads, at least one tong head can rotate around the main pin relative to the other tong head. At least one of the two tong heads comprises a plastic layer, a tong head body and a conducting strip, the conducting strip is arranged on the bottom face of the tong head body, and the plastic layer is arranged on the top face of the tong head body. According to the utility model, the plastic layer is configured to at least cover the side surface and the top surface of the forceps head main body, so that the use effectiveness of a surgical instrument is ensured, and the probability that the forceps head damages adjacent tissues during working is also reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of medical devices, in particular to an end effector of a surgical instrument and an electrosurgical instrument. Background Art

[0002] A surgical forceps is a pliers-like device that relies on mechanical actions between its jaws to grasp, clamp, and constrict tissue. An electrosurgical forceps uses both mechanical clamping actions and energy to treat (e.g., coagulate, cauterize, and / or seal) tissue. Generally, electrosurgical forceps can be classified as monopolar electrosurgical forceps or bipolar electrosurgical forceps.

[0003] Bipolar electrosurgical forceps generally use opposing electrodes charged to different electric potentials, so that the tissue located between the electrodes and the conduction of energy through it can treat the tissue.

[0004] In the related art, bipolar electrosurgical forceps usually require appropriate energy to effectively treat tissue, but the energy applied to the tissue should be within a specific area of the tissue to be treated, and the heat dissipation defined as the heat transfer (heat conduction, heat convection, or current dissipation) to adjacent tissue outside the target area should be minimized. Because when the energy applied to the tissue exceeds the specific area of the tissue to be treated, the bipolar electrosurgical forceps will cause additional damage to the adjacent tissue of the specific area of the tissue to be treated. Summary of the Utility Model

[0005] To solve the above problems, the utility model provides an end effector of a surgical instrument, including two jaw heads, the two jaw heads are connected by a main pin, and there are a first state of being relatively close to each other and a second state of being relatively separated between the two jaw heads, and the first state is used for clamping tissue.

[0006] Among the two jaw heads, at least one jaw head can rotate around the main pin relative to the other jaw head.

[0007] At least one of the two jaw heads includes a plastic layer, a jaw head body, and a conductive sheet. The conductive sheet is arranged on the bottom surface of the jaw head body, the plastic layer is arranged on the top surface of the jaw head body, and the plastic layer is configured to at least cover the side surface and the top surface of the jaw head body.

[0008] Further, the two jaw heads include a first jaw head and a second jaw head. The first jaw head has a first connecting section substantially in a U shape, the second jaw head has a second connecting section substantially in a U shape, the main pin is arranged on the second connecting section, and the first jaw head is rotatably connected to the second jaw head through the main pin.

[0009] Further, a positioning hole is formed on the top surface of the plastic layer, a positioning protrusion is formed on the top surface of the jaw head body, and the plastic layer and the jaw head body are fixed through the cooperation of the positioning hole and the positioning protrusion, and the positioning protrusion is arranged to expose the plastic layer through the positioning hole.

[0010] Further, the plastic layer is arranged to completely cover the side surface and the top surface of the jaw body, and at least partially cover the bottom surface of the jaw body.

[0011] Further, a stop structure is arranged between the jaw body of the second jaw and the conductive sheet. The stop structure is arranged to at least partially expose the conductive sheet, and the stop structure is used to form a gap between the first jaw and the second jaw when the first jaw and the second jaw are in the first state.

[0012] Further, the stop structure includes a connecting portion and a stop portion. A stop hole is formed in the conductive sheet. The stop structure is connected to the jaw body through the connecting portion, and the stop portion is exposed through the stop hole and arranged on the conductive sheet.

[0013] Furthermore, a first conductive sheet is arranged on the bottom surface of the first jaw. A plurality of dot-shaped protrusions are arranged on the surface of the first conductive sheet, and the plurality of dot-shaped protrusions are arranged in a regular array.

[0014] Furthermore, a second conductive sheet is arranged on the bottom surface of the second jaw. The surface of the second conductive sheet is a smooth plane; or, the part of the bottom surface of the second jaw corresponding to the stop structure is a smooth plane, and a plurality of dot-shaped protrusions are arranged on other parts, and the plurality of dot-shaped protrusions are arranged in a regular array.

[0015] Furthermore, the edge of the conductive sheet is bent towards the jaw body, and a tooth-shaped structure is arranged on the edge of the conductive sheet.

[0016] The present utility model also provides an electrosurgical instrument, which includes a handle, a jaw rod and an end effector. The jaw rod is connected to the handle, and the end effector is arranged at one end of the jaw rod far from the handle. The end effector is the end effector of a surgical instrument as described in any one of the above.

[0017] Based on the prior art, the plastic sheet of the present utility model is arranged to at least cover the side surface and the top surface of the jaw body, that is, completely cover the side surface and the top surface of the jaw body. This can not only ensure the heat conduction of the relevant functional components on the bottom surface of the jaw body during the operation, but also avoid the damage of the side surface and the top surface of the jaw body to other normal tissues while ensuring the effectiveness of the use of the electrosurgical instrument, thereby reducing the probability of damage to adjacent tissues caused by the jaw during operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is the exploded view of the components of the present utility model;

[0019] Figure 2 is the enlarged view of the first conductive sheet;

[0020] Figure 3 is the enlarged view of the second conductive sheet.

[0021] Wherein: 1. Plastic layer; 2. First jaw body; 3. First conductive sheet; 4. Second conductive sheet; 5. Second jaw body; 6. Stopping structure; 7. Dot-like protrusion. Detailed implementation mode

[0022] The embodiments of the present utility model will be described in detail below. The examples of the embodiments are shown in the drawings, wherein the same or similar reference numerals represent the same or similar elements or elements with the same or similar functions from beginning to end. The embodiments described below with reference to the drawings are exemplary and are intended to explain the present utility model, and should not be construed as a limitation of the present utility model.

[0023] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is the orientation or positional relationship based on the drawings, and is only for the convenience of describing the present utility model and simplifying the description. Instead of indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, so it should not be construed as a limitation of the present utility model.

[0024] Embodiment 1

[0025] The present utility model provides a distal end effector of a surgical instrument, including two jaws. The two jaws are connected by a main pin. There are a first state in which the two jaws are relatively close to each other and a second state in which the two jaws are relatively separated. During the operation, by pressing the handle to pull the pull rod of the forceps rod backward, the two jaws reach the first state of being relatively close to each other to achieve cutting and coagulation of tissues. After the cutting and coagulation are completed, the handle is released, and the pull rod returns to the original state under the action of the elastic potential energy of the reset member, that is, the second state in which the two jaws are relatively separated. The connection relationship and movement relationship between the jaws and the pull rod are described by the applicant in an earlier published patent for a closing and locking device suitable for a surgical electrode with the publication number of CN215018851U.

[0026] As Figure 1 shown, the two jaws include a first jaw and a second jaw. The first jaw has a first connecting section that is generally U-shaped, and the second jaw has a second connecting section that is generally U-shaped. The main pin is arranged on the second connecting section, and the first jaw is rotatably connected to the second jaw through the main pin; during the operation, the first jaw can rotate relative to the second jaw through the main pin to reach the first state in which the first jaw and the second jaw are relatively close to each other.

[0027] The first jaw head and the second jaw head respectively include a plastic layer 1, a jaw head body, and a conductive sheet. The conductive sheet is disposed on the bottom surface of the jaw head body. The conductive sheet is made of 304 stainless steel or any other material that can achieve the same function. The plastic layer 1 is disposed on the top surface of the jaw head body and is configured to cover the side surface and the top surface of the jaw head body. The plastic layer 1 is made of nylon, polyamide, or any other material that can achieve the same function.

[0028] In this embodiment, by disposing the plastic layer 1 to cover the top surface and the side surface of the jaw head body, not only can the heat conduction of the related functional components on the bottom surface of the jaw head body be ensured during the operation, but also the damage to other normal tissues caused by the top surface and the side surface of the jaw head body can be avoided, thereby reducing the probability of damage to adjacent tissues when the jaw head is working and ensuring the safety and effectiveness of the surgical instrument.

[0029] As a further optimized solution of Embodiment 1, the plastic layer is disposed to completely cover the side surface and the top surface of the jaw head body and at least partially cover the bottom surface of the jaw head body, further reducing the probability of damage to adjacent tissues when the jaw head is working.

[0030] Embodiment 2

[0031] In this embodiment, a positioning hole is formed on the top surface of the plastic layer 1, and a positioning protrusion is formed on the top surface of the jaw head body. The plastic layer 1 and the jaw head body are fixed through the cooperation of the positioning hole and the positioning protrusion, and the positioning protrusion is disposed to expose the plastic layer 1 through the positioning hole.

[0032] A stop structure 6 is disposed between the jaw head body and the conductive sheet of the second jaw head. The stop structure 6 includes a connecting portion and a stop portion. A stop hole is formed on the conductive sheet. The stop structure 6 is connected to the jaw head body through the connecting portion, and the stop portion is exposed from the conductive sheet through the stop hole. The stop structure 6 is made of ceramic, alumina, zirconia, or any other material that can achieve the same function. The stop structure 6 is used to form a gap between the first jaw head and the second jaw head when the first jaw head and the second jaw head are in the first state.

[0033] As Figure 2 shown, a first conductive sheet 3 is disposed on the bottom surface of the first jaw head. A plurality of dot-like protrusions 7 are disposed on the surface of the first conductive sheet 3. The plurality of dot-like protrusions 7 are arranged in a regular array. For example, the plurality of dot-like protrusions 7 can be arranged in a checkerboard-like array, that is, the plurality of dot-like protrusions 7 are divided into several groups of dot-like protrusions 7. The dot-like protrusions 7 within each group are arranged horizontally, and the dot-like protrusions 7 between the groups are arranged vertically. Another example is that the plurality of dot-like protrusions 7 can be arranged in a concentric-circle-like array, that is, the plurality of dot-like protrusions 7 are divided into several groups of dot-like protrusions 7. The dot-like protrusions 7 within each group are arranged in an arc shape, and the arcs formed by the dot-like protrusions 7 between the groups are concentrically distributed.

[0034] AsFigure 3 As shown, a second conductive sheet 4 is provided on the bottom surface of the second jaw head, and the surface of the second conductive sheet 4 is a smooth plane; alternatively, the part of the bottom surface of the second jaw head corresponding to the stop structure 6 is a smooth plane, and several dot-shaped protrusions 7 are provided on other parts, and the several dot-shaped protrusions 7 are arranged in a regular array.

[0035] The dot-shaped protrusions 7 provided on the first conductive sheet 3 and the second conductive sheet 4 can reduce the surface tension of the conductive sheet, thereby reducing the probability of tissue adhering to the surface of the conductive sheet. Therefore, since the probability of tissue adhering to the surface of the conductive sheet is reduced, the probability of removing the end effector from the human body for cleaning is also reduced, and in some usage scenarios, it is even no longer necessary to remove the end effector from the human body for cleaning, thereby largely avoiding the risk of secondary surgery.

[0036] The edge of the conductive sheet is bent towards the jaw head body, and a toothed structure is provided on the edge of the conductive sheet, and this toothed structure is used to strengthen the connection strength between the conductive sheet and the jaw head body, thereby making the structure of the jaw head more firm. As an optimization, a bump or snap structure for cooperating with the toothed structure can be provided on the jaw head body, thereby further strengthening the connection strength between the conductive sheet and the jaw head body.

[0037] Embodiment 3

[0038] This embodiment provides an electrosurgical instrument, including a handle, a clamping rod, and an end effector. The clamping rod is connected to the handle, and the end effector is arranged at one end of the clamping rod away from the handle. The end effector is the end effector of a surgical instrument in any of the foregoing embodiments / embodiment manners. During use, by applying an external force to the handle, the pull rod of the clamping rod is pulled backward under the action of the external force, so that the reset member is in a compressed state, and the jaw heads are in a relatively close first state. At the same time, the power switch is pressed to electrocoagulate the tissue, and the blade buckle is toggled to cut the sealed tissue. After cutting and electrocoagulation are completed, the external force applied to the handle is removed, the power switch is turned off, and at the same time the blade buckle is released. The clamping rod returns to its original position under the action of the elastic potential energy of the reset member, thereby driving the jaw heads back to their original positions, that is, the relatively separated second state.

[0039] The above are only the preferred embodiments of the present invention, and the present invention is not limited thereto. Any equal modifications, equivalent substitutions, and improvements made within the spirit and principle of the present invention shall be included within the scope covered by the present invention.

Claims

1. An end effector of a surgical instrument, comprising two jaws, the two jaws being connected by a main pin, and having a first state of being relatively close to each other and a second state of being relatively separated between the two jaws, the first state being for clamping tissue; at least one of the two jaws is capable of rotating relative to the other jaw around the main pin; characterized in that, at least one of the two jaws includes a plastic layer, a jaw body, and a conductive sheet, the conductive sheet is disposed on the bottom surface of the jaw body, the plastic layer is disposed on the top surface of the jaw body, and the plastic layer is configured to at least cover the side surface and the top surface of the jaw body.

2. The end effector of a surgical instrument according to claim 1, wherein The two jaws include a first jaw and a second jaw, the first jaw has a first connecting section substantially in a U shape, the second jaw has a second connecting section substantially in a U shape, the main pin is disposed on the second connecting section, and the first jaw is rotatably connected to the second jaw through the main pin.

3. The end effector of a surgical instrument according to claim 1, wherein, A positioning hole is formed on the top surface of the plastic layer, a positioning protrusion is formed on the top surface of the jaw body, and the plastic layer and the jaw body are fixed through the cooperation of the positioning hole and the positioning protrusion, and the positioning protrusion is configured to expose the plastic layer through the positioning hole.

4. The end effector of a surgical instrument according to claim 3, characterized in that The plastic layer is configured to completely cover the side surface and the top surface of the jaw body, and at least partially cover the bottom surface of the jaw body.

5. The end effector of a surgical instrument according to claim 2, characterized in that, A stop structure is disposed between the jaw body and the conductive sheet of the second jaw, the stop structure is configured to at least partially expose the conductive sheet, and the stop structure is used for forming a gap between the first jaw and the second jaw when the first jaw and the second jaw are in the first state.

6. The end effector of a surgical instrument according to claim 5, wherein The stop structure includes a connecting portion and a stop portion, a stop hole is formed on the conductive sheet, the stop structure is connected to the jaw body through the connecting portion, and the stop portion is exposed through the stop hole and disposed on the conductive sheet.

7. The end effector of a surgical instrument according to claim 6, characterized in that, A first conductive sheet is disposed on the bottom surface of the first jaw, and a plurality of dot-shaped protrusions are disposed on the surface of the first conductive sheet, and the plurality of dot-shaped protrusions are arranged in a regular array.

8. The end effector of a surgical instrument according to claim 7, wherein, A second conductive sheet is disposed on the bottom surface of the second jaw, and the surface of the second conductive sheet is a smooth plane; or, a part of the bottom surface of the second jaw corresponding to the stop structure is a smooth plane, and a plurality of dot-shaped protrusions are disposed on other parts, and the plurality of dot-shaped protrusions are arranged in a regular array.

9. The end effector of a surgical instrument according to claim 1, wherein, The edge of the conductive sheet is bent towards the jaw body, and a tooth-shaped structure is disposed on the edge of the conductive sheet.

10. An electrosurgical instrument, characterized in that, Comprising a handle, a jaw rod, and an end effector, the jaw rod is connected to the handle, the end effector is disposed at one end of the jaw rod away from the handle, and the end effector is an end effector of a surgical instrument according to any one of claims 1-9.

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