Bend ceramic ball bipolar jaw assembly and tissue closer

Abstract

The invention discloses an elbow ceramic ball bipolar jaw assembly. The elbow ceramic ball bipolar jaw assembly comprises a lower jaw assembly (1); an upper jaw assembly (2); a sliding pin (3); a fixing pin (4); a sleeve (5); the lower jaw assembly (1) is a fixed jaw, and the upper jaw assembly (2) is a movable jaw; opening and closing of the upper jaw assembly (2) are controlled through a sliding pin (3), the sliding pin (3) is located in a groove (201), the included angle between the axis of the groove (201) and the horizontal plane is divided into two parts, and the included angle of the part close to the jaw tip end is larger than the included angle of the part away from the jaw tip end. The ceramic ball is fixedly arranged through the metal jaw sealing plate, a reasonable gap of the jaw sealing plate can be kept, the machining process is simple, and the structure is reliable. In addition, through the sectional type sliding pin groove included angle design, the jaw can be rapidly opened, and meanwhile the jaw transmits small axial force to the trigger when the jaw is closed.

Description

Technical Field

[0001] The present invention belongs to the technical field of medical device industry, and more specifically relates to an elbow ceramic ball bipolar jaw assembly and a tissue closure device. Background Art

[0002] The vascular closure device relies on the mechanical action between the jaws to grasp and clamp the vascular tissue, and uses the mechanical clamping action and electrical energy to seal the clamped tissue. The so-called "open forceps" are usually used in open surgery, while "endoscopic forceps" or "laparoscopic forceps" are used in minimally invasive endoscopic surgery.

[0003] The vessel closure device includes an electrosurgical sealing plate that applies electrosurgical energy to the clamped tissue. By controlling the intensity of the electrosurgical energy applied by the sealing plate to the tissue, the surgeon can seal the vessel tissue.

[0004] Vascular sealing is a process that liquefies the collagen and elastin substances in tissue so that they reform into a fused mass while significantly reducing the demarcation between opposing tissue structures. Cauterization involves the use of heat to destroy tissue, and coagulation is the process of drying tissue. Because vascular tissue sealing procedures involve more than simply cauterizing and coagulating tissue, two major mechanical parameters must be precisely controlled in order to achieve a proper seal in vascular tissue: the pressure applied to the tissue; and the gap distance between the electrodes (i.e., the distance between the opposing jaw members when closed around the tissue).

[0005] In the past, many electrosurgical instruments for various open and endoscopic surgeries have been proposed. In order to maintain an appropriate gap between the upper and lower jaws, for example, Chinese patent application CN117179886A discloses that a ceramic coating is provided between the two jaws, generally by spraying / brushing a layer of ceramic material on a metal substrate, and then sintering at high temperature to form the required jaw assembly. Another way is to use high temperature resistant plastic to injection mold the boss. The first way is complicated in process, difficult to manufacture, and poor in product consistency. The second way uses plastic as an insulating material, so the product reliability is poor.

[0006] Therefore, it is very beneficial to develop a jaw assembly and a tissue closure device that can maintain a reasonable gap between the jaw sealing plates. Summary of the invention

[0007] Based on the above reasons, the present invention is committed to solving the above problems and aims to provide an elbow ceramic ball bipolar jaw assembly and a tissue closure device. Specifically, in order to achieve the purpose of the present invention, the present invention intends to adopt the following technical solutions:

[0008] On one hand, the present invention relates to an elbow ceramic ball bipolar jaw assembly, which comprises: a lower jaw assembly (1); an upper jaw assembly (2); a sliding pin (3); a fixing pin (4); and a sleeve (5); the lower jaw assembly (1) is a fixed jaw, and the upper jaw assembly (2) is a movable jaw; the lower jaw assembly (1) and the upper jaw assembly (2) are hinged together by the fixing pin (4); a cutting head is arranged in the sleeve (5), and a groove for the cutting head to slide after the lower jaw assembly (1) and the upper jaw assembly (2) are closed; the upper jaw assembly (2) and the lower jaw assembly (1) are in the shape of an elbow with an arc and a slender tip, and the upper jaw assembly (2) and the lower jaw assembly (1) are both provided with a metal jaw seal. The invention relates to a method for manufacturing a jaw assembly (102) comprising: a lower jaw assembly (1) and / or a lower jaw assembly comprising a jaw metal support seat (105), a plurality of metal jaw sealing plates (102) being provided on the jaw metal support seat (105), a groove being provided in part of the metal jaw sealing plates (102), a plurality of ceramic balls (101) being partly fixed in the groove of the jaw sealing plate (102), and another part protruding from the surface of the jaw sealing plate (102); the opening and closing of the upper jaw assembly (2) is controlled by a sliding pin (3), the sliding pin (3) being located in the groove (201), the angle between the axis of the groove (201) and the horizontal plane being divided into two parts, the angle of the part close to the jaw tip being greater than the angle of the part far from the jaw tip. The invention fixes the ceramic balls by means of the metal jaw sealing plate, can maintain a reasonable gap between the jaw sealing plates, and has a simple processing technology and a reliable structure. In addition, the present invention can realize rapid opening of the jaws through the segmented sliding pin groove angle design, and at the same time, the jaws transmit a smaller axial force to the trigger when closing.

[0009] In a preferred embodiment of the present invention, the ceramic ball (101) is fixed in the groove of the jaw sealing plate (102) by means of a sealant.

[0010] In a preferred embodiment of the present invention, an insulating jaw insulating gasket (103) is provided between the jaw metal supporting seat (105) and the jaw sealing plate (102), and the jaw sealing plate (102) and the jaw insulating gasket (103) are fixed to the jaw metal supporting seat (105) by means of a jaw rubber coating (104).

[0011] In a preferred embodiment of the present invention, the angle between the axis of the groove (201) and the horizontal plane is 18-25° at the portion close to the jaw tip, and 32-40° at the portion away from the jaw tip.

[0012] Another aspect of the present invention also relates to a tissue closure device, which has the above-mentioned elbow ceramic ball bipolar jaw assembly and also has an operating handle, wherein the elbow ceramic ball bipolar jaw assembly and the operating handle are respectively located at two ends of the sleeve (5).

[0013] In a preferred embodiment of the present invention, the operating handle has a closing trigger (15) and a closing trigger spring (14), wherein the closing trigger (15) controls the closing trigger spring (14), and the closing trigger spring (14) realizes the closing of the upper jaw assembly (2) and the lower jaw assembly (1) by controlling the movement of the sliding pin (3) in the groove (201).

[0014] In a preferred embodiment of the present invention, the operating handle further comprises an energy excitation button (16) for controlling the power supply to the metal jaw sealing plates (102) in the upper jaw assembly (2) and the lower jaw assembly (1).

[0015] In a preferred embodiment of the present invention, the operating handle further comprises a push knife trigger (17), which is connected to the push knife connecting rod (9) via a fixing pin (8), so as to convert the swing of the push knife trigger into the linear motion of the push knife connecting rod, and the push knife connecting rod (9) drives the sliding ring (7) to move linearly in the sleeve (5), and the sliding ring (7) drives the cutting head to move linearly in the groove of the jaw assembly.

[0016] The present invention has at least the following beneficial effects:

[0017] (1) The present invention fixes the ceramic ball by means of a metal jaw sealing plate, which can maintain a reasonable gap between the jaw sealing plates, and has a simple processing technology and a reliable structure.

[0018] (2) The present invention can realize rapid opening of the jaws through the segmented sliding pin groove angle design, and at the same time, the jaws transmit a smaller axial force to the trigger when closing. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 : Schematic diagram of the elbow ceramic ball bipolar jaw assembly and tissue closure device according to an embodiment of the present invention.

[0020] Figure 2 : Schematic diagram of the shape of the upper jaw assembly (2) and the lower jaw assembly (1) in an embodiment of the present invention.

[0021] Figure 3 : A schematic structural diagram of the lower jaw assembly (1) in an embodiment of the present invention.

[0022] Figure 4 : Schematic diagram of the connection between the upper jaw assembly (2) and the sliding pin (3) in an embodiment of the present invention. DETAILED DESCRIPTION

[0023] In order to further understand the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in combination with the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0024] Unless otherwise specified, the components involved in the embodiments of the present invention are commercially available products and can be purchased through commercial channels.

[0025] Example 1

[0026] The present invention discloses an elbow ceramic ball bipolar jaw assembly and a tissue closure device. The elbow ceramic ball bipolar jaw assembly comprises: a lower jaw assembly (1); an upper jaw assembly (2); a sliding pin (3); a fixing pin (4); and a sleeve (5). The lower jaw assembly (1) is a fixed jaw, and the upper jaw assembly (2) is a movable jaw. The lower jaw assembly (1) and the upper jaw assembly (2) are hinged together by the fixing pin (4). A cutting head (not shown in the figure) is arranged in the sleeve (5). After the lower jaw assembly (1) and the upper jaw assembly (2) are closed, a groove (such as a groove) for the cutting head to slide is provided. Figure 1 shown).

[0027] like Figure 2 As shown, the upper jaw assembly (2) and the lower jaw assembly (1) are in the shape of elbows with a certain curvature and slender tips. Both the upper jaw assembly (2) and the lower jaw assembly (1) are provided with a metal jaw sealing plate (102). After the upper jaw assembly (2) and the lower jaw assembly (1) are closed, the metal jaw sealing plate (102) is used to close the tissue. After power is turned on, the tissue is sealed by heating. After sealing, the cutting head slides to cut the sealed tissue.

[0028] like Figure 3As shown, the lower jaw assembly (1) includes a jaw metal support seat (105), a plurality of metal jaw sealing plates (102) are arranged on the jaw metal support seat (105), grooves are arranged in some of the metal jaw sealing plates (102), a part of the ceramic ball (101) is fixed in the groove of the jaw sealing plate (102), and the other part protrudes from the upper surface of the jaw sealing plate (102); an insulating jaw insulating gasket (103) is arranged between the jaw metal support seat (105) and the jaw sealing plate (102), and the jaw sealing plate (102) and the jaw insulating gasket (103) are fixed on the jaw metal support seat (105) through the jaw rubber coating (104). Processing technology: firstly, a pit with a diameter of 0.6 mm and a depth of 0.4 mm is processed on the jaw sealing plate (102), and the processing technology is stamping and machining. The second step is to bond the ceramic ball (101) into the concave pit of the jaw sealing plate (102). The third step is to process the jaw insulating gasket (103) by injection molding, and the jaw metal support seat (105) by MIM processing (metal powder injection molding technology). The fourth step is to place the jaw sealing plate (102), the jaw insulating gasket (103), and the jaw metal support seat (105) as shown in the figure ( Figure 2 ) is assembled and placed in a plastic injection mold, and the injection-molded jaws are covered with glue (104).

[0029] like Figure 4 The opening and closing of the upper jaw assembly (2) is controlled by a sliding pin (3), and the sliding pin (3) is located in a groove (201). The angle between the axis of the groove (201) and the horizontal plane is divided into two parts, the angle of the part close to the jaw tip is 35.5°, and the angle of the part away from the jaw tip is 21.5°. The purpose of this segmented angle design is to drive the upper jaw to open and close through the movement of the trigger, so that the jaw can be opened quickly, and at the same time, the jaw transmits a smaller axial force to the trigger when closing.

[0030] like Figure 1 As shown, the tissue closer includes the above-mentioned elbow ceramic ball bipolar jaw assembly and also includes: a handle; the handle includes: a rotating wheel (6), a sliding ring (7); a fixing pin (8); a push-blade connecting rod (9); a fixing pin (10); a handle housing (11); a spring (12); a spring baffle (13); a closing trigger spring (14); a closing trigger (15); an energy excitation button (16) and a push-blade trigger (17).

[0031] The operator compresses the spring (12) by closing the trigger (15), and the spring (12) drives the inner sleeve shaft to move axially. The inner sleeve shaft and the sliding pin (3) are an integral part. The movement of the sliding pin (3) in the groove (201) realizes the closing of the upper jaw assembly (2) and the lower jaw assembly (1). Since the upper jaw assembly (2) and / or the lower jaw assembly (1) is provided with a ceramic ball (101) protruding from the surface of the metal jaw sealing plate (102), the tissue will not be excessively squeezed.

[0032] After the upper jaw assembly (2) and the lower jaw assembly (1) are closed, the operator controls the metal jaw sealing plates (102) in the upper jaw assembly (2) and the lower jaw assembly (1) to be energized through the energy excitation button (16), thereby heating the tissue and closing the tissue.

[0033] Afterwards, the push knife trigger (17) can be controlled by the operation. The push knife trigger (17) is connected to the push knife connecting rod (9) through the fixing pin (8), and the swing of the push knife trigger is converted into the linear motion of the push knife connecting rod. The push knife connecting rod (9) drives the sliding ring (7) to move linearly in the sleeve (5), and the sliding ring (7) drives the cutting knife head to move linearly in the groove of the jaw assembly, thereby realizing the tissue cutting function.

[0034] The above describes the preferred embodiments of the present invention, but it is not intended to limit the present invention. Those skilled in the art may make improvements and changes to the embodiments disclosed herein without departing from the scope and spirit of the present invention.

Claims

1. A bipolar jaw assembly, characterized in that: The bipolar jaw assembly comprises: a lower jaw assembly (1); an upper jaw assembly (2); a sliding pin (3); a fixing pin (4); and a sleeve (5); the lower jaw assembly (1) is a fixed jaw, and the upper jaw assembly (2) is a movable jaw; the lower jaw assembly (1) and the upper jaw assembly (2) are hinged together via the fixing pin (4); a cutting blade is provided in the sleeve (5), and a groove is provided for the cutting blade to slide after the lower jaw assembly (1) and the upper jaw assembly (2) are closed; the upper jaw assembly (2) and the lower jaw assembly (1) are in the shape of curved elbows with slender tips, and both the upper jaw assembly (2) and the lower jaw assembly (1) are provided with a metal jaw sealing plate (102); The jaw assembly (1) and / or the lower jaw assembly comprises a jaw metal support seat (105), a plurality of metal jaw sealing plates (102) are arranged on the jaw metal support seat (105), grooves are arranged in part of the metal jaw sealing plates (102), a part of the plurality of ceramic balls (101) are fixed in the grooves of the jaw sealing plates (102), and another part protrudes from the surface of the jaw sealing plates (102); the opening and closing of the upper jaw assembly (2) is controlled by a sliding pin (3), the sliding pin (3) is located in the groove (201), and the angle between the axis of the groove (201) and the horizontal plane is divided into two parts, and the angle of the part close to the jaw tip is greater than the angle of the part away from the jaw tip.

2. The bipolar jaw assembly according to claim 1, characterized in that The ceramic ball (101) is fixed in the groove of the jaw sealing plate (102) by means of a sealant.

3. The bipolar jaw assembly according to claim 1, characterized in that An insulating jaw insulating gasket (103) is provided between the jaw metal support seat (105) and the jaw sealing plate (102), and the jaw sealing plate (102) and the jaw insulating gasket (103) are fixed to the jaw metal support seat (105) by means of jaw rubber coating (104).

4. The bipolar jaw assembly according to claim 1, characterized in that: The angle between the axis of the groove (201) and the horizontal plane is 18-25° at the portion close to the jaw tip, and 32-40° at the portion away from the jaw tip.

5. A tissue closure device, characterized in that: The tissue closure device comprises the bipolar jaw assembly according to any one of claims 1 to 4, and also comprises an operating handle. The elbow ceramic ball bipolar jaw assembly and the operating handle are respectively located at two ends of the sleeve (5).

6. The tissue closure according to claim 5, characterized in that: The operating handle comprises a closing trigger (15) and a closing trigger spring (14); the closing trigger (15) controls the closing trigger spring (14); and the closing trigger spring (14) realizes the closing of the upper jaw assembly (2) and the lower jaw assembly (1) by controlling the movement of the sliding pin (3) in the groove (201).

7. The tissue closure according to claim 5, characterized in that: The operating handle also has an energy excitation button (16) for controlling the power supply of the metal jaw sealing plates (102) in the upper jaw assembly (2) and the lower jaw assembly (1).

8. The tissue closure according to claim 5, characterized in that: The operating handle also has a knife-pushing trigger (17), which is connected to the knife-pushing connecting rod (9) via a fixing pin (8) to swing the knife-pushing trigger. The push-knife connecting rod (9) drives the sliding ring (7) to move linearly in the sleeve (5). The sliding ring (7) drives the cutting blade to move linearly in the groove of the jaw assembly.

Images