Liquid outlet mechanism and operation electrode

Abstract

The invention discloses a liquid outlet mechanism and a surgical electrode. The liquid outlet mechanism comprises a plurality of liquid outlet assemblies, and each liquid outlet assembly comprises a liquid outlet pipe, a micro valve communicating with the outlet end of the liquid outlet pipe and a drainage channel communicating with the liquid outlet pipe. The liquid inlet dynamic pressure of the liquid outlet pipes is the same and the liquid outlet pipes are arranged around the reference axis. A plurality of blocking pieces are arranged on the inner wall of the liquid outlet pipe and are sequentially arranged in a crossed mode along the axis of the liquid outlet pipe. The liquid outlet pipe is configured to bend along with bending of the reference axis. The liquid outlet dynamic pressure of the liquid outlet pipe located on the outer side of the bend is larger than the liquid outlet dynamic pressure of the liquid outlet pipe located on the inner side of the bend. And the micro valve is configured to be opened after the hydrodynamic pressure reaches a set value. And the liquid blocked by the micro valve flows out from the drainage channel. Through the arrangement of the separation blade and the micro valve, when the end part of the operation electrode is bent, the cutting form of the operation electrode can be adjusted.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of medical devices, in particular to a liquid outlet mechanism and a surgical electrode. BACKGROUND

[0002] Currently, in surgical operations, surgical electrodes (i.e. plasma knives, or electric knives) are increasingly used instead of traditional pure metal surgical knives for surgical operations. In surgical electrodes, there is a surgical electrode that uses physiological saline as a medium to perform cutting operations. The surgical electrode with physiological saline as a conductive and medium carrier sprays physiological saline through a plurality of liquid outlet pipes, and sucks physiological saline through a liquid suction pipe, while setting a positive and negative electrode to electrify the physiological saline. Using high-frequency electric energy, the surgical electrode completes the plasma / electrocoagulation cutting of the tissue through the physiological saline, which is different from the pure electric cauterization mode of the traditional dry electrode. The physiological saline not only solves the problem of high-frequency electric conduction, but also realizes tissue cooling and reduces scorching.

[0003] In the use of the existing surgical electrode with physiological saline as a conductive and medium carrier, since the part to be cut is usually in a relatively hidden position, the end of the surgical electrode needs to be bent in most cases to meet the surgical requirements.

[0004] However, in the existing surgical electrode, all the liquid outlet pipes usually spray physiological saline, and the cutting form of the surgical electrode cannot be changed, which is equivalent to the cutting knife edge shape being constant, and cannot meet the cutting requirements in complex operations. SUMMARY

[0005] In view of the problems existing in the prior art, the present application discloses a liquid outlet mechanism and a surgical electrode, so that the cutting form of the surgical electrode can be adjusted.

[0006] The purpose of the present application is achieved by the following technical solutions:

[0007] The present application discloses a liquid outlet mechanism, comprising a plurality of liquid outlet assemblies, the liquid outlet assembly comprising a liquid outlet pipe, a micro valve in communication with the outlet end of the liquid outlet pipe, and a flow discharge channel in communication with the liquid outlet pipe; the liquid inlet dynamic pressure of each liquid outlet pipe is the same and is arranged around a reference axis; a plurality of baffles are arranged on the inner wall of the liquid outlet pipe, and the baffles are arranged in sequence along the axis of the liquid outlet pipe; the liquid outlet pipe is configured to bend with the reference axis, and the liquid outlet dynamic pressure of the liquid outlet pipe located on the outer side of the bending is greater than that of the liquid outlet pipe located on the inner side of the bending; the micro valve is configured to open when the liquid dynamic pressure reaches a set value; the liquid blocked by the micro valve flows out from the flow discharge channel.

[0008] Further, the baffles are arranged in sequence in a figure-of-eight shape, and the plane of the figure-of-eight shape is arranged towards the reference axis.

[0009] The application also discloses a surgical electrode comprising a suction tube, a plurality of nozzles and the liquid outlet mechanism as described above; the outlet end of the micro valve is connected with the corresponding nozzle; each of the liquid outlet tubes is arranged around the suction tube, and the axis of the suction tube is the reference axis; the jet direction of the nozzle is configured to jet towards the outside of the surgical electrode, and when each of the nozzles jets, the jet liquid converges at a set point on the liquid suction path of the suction tube.

[0010] Further, a plurality of partition strips are arranged outside the suction tube, and an outer wall piece is connected between adjacent partition strips; the partition strips, the outer wall piece and the outer wall of the suction tube cooperate to form the liquid outlet tube.

[0011] Further, the outer wall piece is a metal piece, and the outer wall piece is configured as a negative electrode of the surgical electrode.

[0012] Further, the partition strips and the outer wall piece are detachably connected.

[0013] Further, an electrode piece configured as a positive electrode of the surgical electrode is further included, and the electrode piece is arranged on the liquid suction path of the suction tube, and the electrode piece is located on the side of the suction tube towards the set point.

[0014] Further, a ring-shaped block that is simultaneously matched with the outlet end of each of the liquid outlet tubes is further included, each of the nozzles is arranged on the ring-shaped block, the inner circular area of the ring-shaped block is in communication with the suction tube, and the electrode piece is arranged in the inner circular area of the ring-shaped block.

[0015] Further, the ring-shaped block is provided with a fixing strip that partially shields the inner circular area of the ring-shaped block, and the electrode piece is fixed on the side of the fixing strip towards the suction tube.

[0016] Further, the fixing strip is provided with a plurality of fixing strips, the first end of each of the fixing strips is fixed on the inner wall of the inner circular area of the ring-shaped block, the second end of each of the fixing strips converges at a same convergence point and is connected with each other, and the electrode piece is arranged on the convergence point; the convergence point is located at the center of the inner circular area of the ring-shaped block, and each of the fixing strips is arranged at equal intervals.

[0017] Compared with the prior art, the present application has the beneficial effect that the dynamic pressure of the outlet end of each liquid outlet pipe is reduced by the setting of the leakage passage, but the dynamic pressure of each liquid outlet pipe is reduced by the same amount. By the setting of the baffle and the micro valve, when the end of the surgical electrode is bent, the dynamic pressure of the liquid outlet end of the liquid outlet pipe located on the outside of the bend is higher than the dynamic pressure of the liquid outlet end of the liquid outlet pipe located on the inside of the bend. Therefore, under the condition that the flow rate of the inlet end of each liquid outlet pipe is the same, that is, each liquid outlet pipe is supplied with liquid by the same liquid supply pipe, the dynamic pressure difference of the liquid outlet ends of the liquid outlet pipes located on the inside and outside of the bend is used to make the dynamic pressure of the physiological saline in the liquid outlet pipe located on the outside of the bend meet the opening pressure of the micro valve, so that the physiological saline flows out through the micro valve; and the dynamic pressure of the physiological saline in the liquid outlet pipe located on the inside of the bend cannot meet the opening pressure of the micro valve, so that the physiological saline in the liquid outlet pipe located on the inside of the bend can only flow out through the leakage passage, at this time, only part of the liquid outlet pipes of the surgical electrode are supplied with water. When the liquid inflow rate in the liquid outlet pipe is increased, the dynamic pressure of the liquid outlet pipe located on the inside of the bend can also be greater than the opening pressure of the micro valve, at this time, the physiological saline of all the liquid outlet pipes flows out through the micro valve. Therefore, the cutting form of the surgical electrode can be adjusted by changing the liquid inflow rate of the liquid outlet pipe when the end of the surgical electrode is bent, which is equivalent to adjusting the shape of the cutting edge of the cutting knife. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 is a first schematic view of the working part in the surgical electrode of the present application; Figure 2 is a second schematic view of the working part in the surgical electrode of the present application; Figure 1 is a sectional view of A-A in the surgical electrode of the present application; Figure 3 is an enlarged schematic view of B in the surgical electrode of the present application; Figure 2 Figure 4 is a second schematic view of the physiological saline sprayed by the working part in the surgical electrode of the present application when the working part is in the vertical state and the bent state; Figure 5 is a schematic view of the baffle in the liquid outlet pipe located on the inside of the bend and the liquid outlet pipe located on the outside of the bend in the liquid outlet mechanism of the present application when the liquid outlet mechanism is bent; Figure 6 is a first schematic view of the physiological saline sprayed by the working part in the surgical electrode of the present application when the working part is in the vertical state and the bent state; Figure 7 is a second schematic view of the physiological saline sprayed by the working part in the surgical electrode of the present application when the working part is in the vertical state and the bent state; Figure 8 is a position schematic view of the liquid suction pipe, the baffle and the separation strip in the surgical electrode of the present application.

[0019] In the drawings: ​1 - liquid outlet pipe; 2 - micro valve; 3 - discharge channel; 4 - baffle; 5 - liquid suction pipe; 6 - nozzle; 7 - separation strip; 8 - outer wall piece; 9 - electrode piece; 10 - ring block; 11 - fixing strip. DETAILED DESCRIPTION

[0020] The technical solutions of the present application will be described clearly and completely below in conjunction with the drawings. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0021] In the description of the present application, it should be noted that the orientations or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second", "third" are only for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0022] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances. In addition, the technical features involved in the different embodiments of the present application described below can be combined with each other as long as they do not conflict with each other.

[0023] The present application discloses a kind of liquid outlet mechanism, mainly use in surgical electrode. The application of liquid outlet mechanism in surgical electrode is mainly taken as an example below, and is described in detail.

[0024] Surgical electrode, including handle part and the working part connected with handle part.

[0025] Among them, the working part includes the liquid outlet mechanism for spraying physiological saline, and positive terminal and negative terminal. The liquid ejection end of the liquid outlet mechanism is arranged at the end of the working part. The liquid outlet mechanism is overall strip-shaped and bendable, and the bent liquid outlet mechanism is convenient for stretching into the human body for cutting operation, and the physiological saline sprayed by the liquid outlet mechanism is used as medium to electrically connect the positive terminal and the negative terminal. After energization, high-frequency electricity forms a directional plasma channel in the physiological saline medium, breaks down the molecular bond of the tissue to realize cutting.

[0026] The handle part is internally provided with a liquid supply main pipe for conveying physiological saline to the liquid outlet mechanism, and a wire connected to the positive terminal and the negative terminal. The wire and the liquid supply main pipe extend out of the handle part, the wire has a plug at the end away from the working part, and the plug is detachably connected to a power socket. The liquid supply main pipe has a connecting port at the end away from the working part, and the connecting port is detachably connected to an external liquid supply host. The handle part is further provided with a control assembly for controlling the bending of the liquid outlet mechanism, and the control assembly can adopt a pull wire mode to control the bending of the liquid outlet mechanism.

[0027] The surgeon holds the handle part of the surgical electrode, drives the control assembly to make the end of the liquid outlet mechanism in a vertical state, and then slowly extends the liquid outlet mechanism into the human body. After approaching the surgical position, the control assembly is driven to bend the liquid outlet mechanism, so that the end of the liquid outlet mechanism reaches the surgical position. Finally, the physiological saline sprayed by the liquid outlet mechanism is controlled, and the positive terminal and the negative terminal are controlled to be electrified. The physiological saline sprayed by the liquid outlet mechanism connects the positive terminal and the negative terminal, and the cutting operation is performed by the charged physiological saline.

[0028] As shown in Figures 1 to 5 The liquid outlet mechanism is improved, and specifically, the liquid outlet mechanism includes a liquid outlet assembly, and the liquid outlet assembly is also strip-shaped and bendable. The liquid outlet assembly is provided with a plurality of liquid outlet assemblies, and each liquid outlet assembly has the same structure. Each single liquid outlet assembly includes a liquid outlet pipe 1, a micro valve 2 connected to the outlet end of the liquid outlet pipe 1, and a flow discharge channel 3 connected to the liquid outlet pipe 1. In detail, the outlet end of the liquid outlet pipe 1 is in communication with the inlet end of the micro valve 2. The flow discharge channel 3 can be in the form of a pipe, or the flow discharge channel 3 can be a flow discharge hole provided on the liquid outlet pipe 1. Hereinafter, the flow discharge channel 3 is described in detail in the form of a pipe. The pipe-shaped flow discharge channel 3 is convenient for collecting the physiological saline flowing out of the flow discharge channel 3. Preferably, the communication point of the flow discharge channel 3 and the liquid outlet pipe 1 is arranged away from the inlet end of the liquid outlet pipe 1, and most preferably, the communication point is located at the end of the liquid outlet pipe 1 close to the micro valve 2. The structures of the liquid outlet assemblies are completely the same. In a single liquid outlet assembly, the number of liquid outlet pipes 1 is one, and the number of micro valves 2 and flow discharge channels 3 is not limited and can be one or more. The liquid inlet dynamic pressure of each liquid outlet pipe 1 is the same and surrounds a reference axis, and in detail, each liquid outlet pipe 1 can be arranged at equal intervals around the reference axis, or the liquid outlet pipes 1 can be symmetrically arranged on both sides of the reference axis.

[0029] As shown in Figure 3As shown, several baffles 4 are provided on the inner wall of the outlet pipe 1, and the baffles 4 are arranged in a crisscross pattern along the axis of the outlet pipe 1. Preferably, the baffles 4 extend to both ends of the outlet pipe 1, that is, the outlet pipe 1 is filled with baffles 4. The baffles 4 are arranged in a crisscross pattern from the inlet end to the outlet end along the axis of the outlet pipe 1, and the connection point between the drain channel 3 and the outlet pipe 1 is located between the baffles 4 and the inlet end of the micro valve 2. The outlet pipe 1 is configured to bend with the reference axis, that is, the outlet pipe 1 is an elastic pipe. The control component is configured to control the reference axis from a straight state to a bent state, thereby controlling each outlet pipe 1 to bend in the same direction. The reference axis can be the axis of an elastic round rod. When the elastic round rod changes from a vertical state to a bent state, the axis of the elastic round rod also changes from a vertical state to a bent state accordingly.

[0030] like Figure 5 As shown, since the outlet pipe 1 bends along the reference axis, when each outlet pipe 1 bends along the reference axis, the outlet dynamic pressure of the outlet pipe 1 located on the outside of the bend is greater than that of the outlet pipe 1 located on the inside of the bend. The detailed principle is as follows: like Figure 5 As shown, the inner diameter of both the outlet pipe 1 located on the inside and outside of the bend increases proportionally after bending along the reference axis. Therefore, the radial cross-sectional area of ​​each outlet pipe 1 remains the same after bending. However, after bending, the length of the outlet pipe 1 located on the outside of the bend is lengthened, while the length of the outlet pipe 1 located on the inside of the bend is shortened. This directly results in the spacing between the baffles 4 on the outlet pipe 1 located on the outside of the bend being greater than the spacing between the baffles 4 on the outlet pipe 1 located on the inside of the bend, along the length direction of the outlet pipe 1.

[0031] The flow of physiological saline in the outlet tube 1 is mainly affected by eddy current losses caused by the obstruction of baffles 4 and friction losses caused by friction with the tube wall, thus affecting the outlet flow velocity and ultimately the outlet dynamic pressure. Friction losses are negligible, but the baffles 4 generate significant turbulence and eddies in the liquid in the outlet tube 1, resulting in substantial eddy current losses. The energy loss caused by these eddy current losses greatly reduces the outlet flow velocity of the physiological saline. The spacing between the baffles 4 affects the magnitude of these eddy current losses; the closer the baffles 4 are, the greater the eddy current losses.

[0032] In the liquid outlet pipe 1 located on the outer side of the bend and the liquid outlet pipe 1 located on the inner side of the bend, since the inner diameters of the two are equivalent to increase after being bent, therefore, when the baffle 4 is not arranged, the dynamic pressure of the two is basically the same (ignoring the extremely small friction loss). But due to the arrangement of the baffle 4, in the radial direction of the liquid outlet pipe 1, the distance between the baffle 4 in the liquid outlet pipe 1 located on the outer side of the bend and the baffle 4 in the liquid outlet pipe 1 located on the inner side of the bend is the same. While in the length direction of the liquid outlet pipe 1, due to the length change of the liquid outlet pipe 1 located on the outer side of the bend and the liquid outlet pipe 1 located on the inner side of the bend, the distance between the baffles 4 in the liquid outlet pipe 1 located on the outer side of the bend is greater than the distance between the baffles 4 in the liquid outlet pipe 1 located on the inner side of the bend, therefore, the vortex loss of the liquid outlet pipe 1 located on the outer side of the bend is smaller than the vortex loss of the liquid outlet pipe 1 located on the inner side of the bend. After the physiological saline flows through the liquid outlet pipe 1 located on the inner side of the bend and the liquid outlet pipe 1 located on the outer side of the bend, the liquid outlet flow rate of the liquid outlet pipe 1 located on the inner side of the bend is lower than the liquid outlet flow rate of the liquid outlet pipe 1 located on the inner side of the bend, thereby causing the liquid outlet dynamic pressure of the liquid outlet pipe 1 located on the outer side of the bend to be greater than the liquid outlet dynamic pressure of the liquid outlet pipe 1 located on the inner side of the bend (the physical nature of the liquid dynamic pressure is the kinetic energy of the macroscopic directional flow of unit volume of fluid, and its value E = 1 / 2 p v 2 According to the formula, the liquid dynamic pressure E is determined by the density p of the liquid and the flow rate v of the directional flow).

[0033] As shown in Figure 4 , the micro valve 2 is configured to open when the dynamic pressure of the liquid reaches a set value. The micro valve 2 is an important component device for controlling the flow in the microfluidic system, and the micro valve 2 can form a sudden narrowing micro gap in the micro channel. Only when the driving pressure (i.e. dynamic pressure) of the fluid exceeds the surface tension threshold value, the liquid bridge is broken, and the fluid can pass through. In a single liquid outlet assembly, the number of micro valves 2 can be one or more; when the number of micro valves 2 is more, each micro valve 2 needs to use the same micro valve 2. The micro valve 2 is made by 3D printing.

[0034] The main supply pipe is connected to each outlet pipe 1, ensuring that the inlet dynamic pressure of each outlet pipe 1 is the same. In a single outlet assembly, the number of drain channels 3 can be one or more; when there are multiple drain channels 3, the diameters of the tubular drain channels 3 can be different or the same. Furthermore, when there are multiple drain channels 3, the position of each drain channel 3 relative to the outlet pipe 1 is unrestricted, as long as the connection point between each drain channel 3 and the outlet pipe 1 is far from the inlet end of the outlet pipe 1. Although the drain channels 3 cause some saline to flow out, resulting in a decrease in the outlet dynamic pressure of the outlet pipe 1, since the structures of each outlet assembly are identical, the amount of decrease in outlet dynamic pressure caused by each drain channel 3 is the same, and it does not affect the difference in outlet dynamic pressure between each outlet pipe 1. The drain channels 3 can be configured to not bend with the outlet pipe 1, or they can be configured to bend with the outlet pipe 1. When the drain channel 3 bends along with the outlet pipe 1, the drain channel 3 is also designed to be flexible. At this time, since the changes in the diameter and length of the drain channel 3 are very small, and the frictional loss between the saline and the wall of the drain channel 3 is negligible, the difference in the drop in dynamic pressure of each outlet pipe 1 caused by the changes in the diameter and length of the drain channel 3 is almost negligible.

[0035] Therefore, when each outlet tube 1 flows into physiological saline at the first inlet dynamic pressure, and each outlet tube 1 bends along the reference axis, the outlet dynamic pressure of each outlet tube 1 decreases by the same amount due to the arrangement of the drain channel 3. Furthermore, the eddy current loss caused by the baffle 4 in the outlet tube 1 located on the outer side of the bend is relatively smaller than that caused by the baffle 4 in the outlet tube 1 located on the inner side of the bend. Therefore, the outlet dynamic pressure of the outlet tube 1 located on the outer side of the bend (set as the first external outlet dynamic pressure) is higher than the outlet dynamic pressure of the outlet tube 1 located on the inner side of the bend (set as the first internal outlet dynamic pressure). The opening pressure of the microvalve 2 is set as the opening dynamic pressure, and only the first external outlet dynamic pressure is greater than the opening dynamic pressure. Therefore, as... Figure 6 As shown, at this time, only the saline solution in the outlet tube 1 located on the outer side of the bend can flow out through the micro-valve 2, while the saline solution in the outlet tube 1 located on the inner side of the bend is blocked by the micro-valve 2 due to insufficient outflow dynamic pressure. Finally, all the saline solution in the outlet tube 1 on the inner side of the bend flows out through the drain channel 3. In this state, the saline solution sprayed by the surgical electrode is minimal, and the unit cutting area of ​​the surgical electrode cutting point is minimal. It is equivalent to the surgical electrode forming a very fine knife during operation, which is suitable for cutting small areas of human tissue.

[0036] When the liquid inlet pressure of each liquid outlet pipe 1 is increased, the physiological saline flows into the physiological saline with the second liquid inlet dynamic pressure, and it is set that the liquid outlet dynamic pressure of the liquid outlet pipe 1 located on the inner side of the bending (set as the second liquid outlet dynamic pressure) is still less than the opening dynamic pressure, but the liquid outlet dynamic pressure of the liquid outlet pipe 1 located between the outer side of the bending and the inner side of the bending exceeds the opening dynamic pressure, then the physiological saline can be sprayed out from the micro valve 2 corresponding to the liquid outlet pipe 1 on the outer side of the bending. In this state, the physiological saline sprayed out from the surgical electrode is moderate, the unit cutting area of the cutting point of the surgical electrode is moderate, which is equivalent to that a moderate size knife is formed in the working of the surgical electrode, and it is suitable for the daily cutting of human tissue.

[0037] When the liquid inlet pressure of each liquid outlet pipe 1 is further increased, the physiological saline flows into the physiological saline with the third liquid inlet dynamic pressure, and it is set that the liquid outlet dynamic pressure of the liquid outlet pipe 1 located on the inner side of the bending (set as the third liquid outlet dynamic pressure) is greater than or equal to the opening dynamic pressure, then the physiological saline can be sprayed out from the micro valve 2 corresponding to all the liquid outlet pipes 1. In this state, the physiological saline sprayed out from the surgical electrode is the most, the unit cutting area of the cutting point of the surgical electrode is the largest, which is equivalent to that a large diameter knife is formed in the working of the surgical electrode, and it is suitable for the large area cutting of human tissue.

[0038] The present application is provided with the micro valve 2 and the baffle 4, when the end of the surgical electrode is bent, the dynamic pressure of the liquid outlet pipe 1 located on the outer side of the bending is higher than that of the liquid outlet pipe located on the inner side of the bending. Therefore, under the condition that the flow rate of each liquid outlet pipe 1 at the inlet end is the same, that is, each liquid outlet pipe 1 is supplied with liquid by the liquid supply main pipe, the dynamic pressure difference between the outlet ends of the liquid outlet pipes 1 located on the inner and outer sides of the bending is used to make the dynamic pressure of the physiological saline in the liquid outlet pipe 1 located on the inner side of the bending unable to meet the opening pressure of the micro valve 2, so as to control the water outlet of the liquid outlet pipe 1 located on the outer side of the bending. And when the liquid inlet flow rate in the liquid outlet pipe 1 is increased, the liquid outlet dynamic pressure of the liquid outlet pipe 1 close to the outer side of the bending can open the micro valve 2. After further increasing the liquid inlet flow rate in the liquid outlet pipe 1, the liquid outlet dynamic pressure of the liquid outlet pipe 1 located on the inner side of the bending can also be greater than the opening pressure of the micro valve, at this time, the physiological saline can flow out from the micro valve 2 corresponding to all the liquid outlet pipes 1. Therefore, by adjusting the liquid inlet pressure of the liquid outlet pipe 1, the number of the opened micro valve 2 can be realized when the end of the surgical electrode is bent, so as to realize the adjustable cutting form of the surgical electrode, that is, the size of the cutting edge of the cutting knife can be adjusted.

[0039] The liquid outlet mechanism mentioned in the present application is mainly used in the surgical electrode, and the liquid sprayed out from the liquid outlet mechanism is physiological saline, but the liquid outlet mechanism of the present application can also be used in other fields. For example, it can be used in the kitchen utensil field, the liquid outlet mechanism of the present application can be used in the water faucet which can be bent to one side, at this time, the liquid sprayed out from the liquid outlet mechanism is ordinary domestic water, and the water outlet amount of the water faucet can be adjusted by controlling the water inlet dynamic pressure of the liquid outlet pipe 1 by means of the faucet knob. The water faucet which can be bent to one side can be used not only in the kitchen utensil field, but also in the agricultural field, at this time, the liquid sprayed out from the liquid outlet mechanism can be nutrient solution.

[0040] In the liquid outlet mechanism of the present application, as shown in Figure 3 and Figure 5 , the baffle 4 can be arranged in a spread shape, the spread shape opening is arranged towards the inlet end of the liquid outlet pipe 1, and the plane of the spread shape is arranged towards the reference axis. The present application arranges the baffle 4 in a spread shape, so that the situation that the energy loss is too large due to the dead angle formed by the baffle 4 and the inner wall of the liquid outlet pipe 1 when the spread shape opening is arranged towards the outlet end of the liquid outlet pipe 1 does not occur, thereby improving the energy consumption of the entire surgical electrode and forming unnecessary energy loss. Of course, the baffles 4 can also be arranged parallel to each other, but when the liquid outlet pipe 1 is curved, the dynamic pressure difference of the liquid outlet end in the curved inner side and the curved outer side of the liquid outlet pipe 1 is not as large as when the baffle 4 is arranged in a spread shape.

[0041] The present application also discloses a surgical electrode which adopts the above-mentioned liquid outlet mechanism, thereby facilitating the adjustment of the unit cutting area of the cutting point of the surgical electrode. In the surgical electrode of the present application, the position of the electrode, the shape of the liquid outlet pipe 1 and many other technical features have multiple implementation manners, and in the following description of the shape of the liquid outlet pipe 1 and many other technical features, each technical feature is mainly selected as one implementation manner for detailed description, and the implementation example of this implementation manner is referred to as the present embodiment. The other implementation manners of the shape of the liquid outlet pipe 1 and many other features are referred to as other embodiments, and the following description is brief.

[0042] In the present embodiment, as shown in Figure 2 , Figure 3 and Figure 6 , the working part of the surgical electrode includes a liquid suction pipe 5 and a plurality of nozzles 6. Among them, the number of the liquid suction pipe 5 is one and has elasticity, and the number of the nozzles 6 is the same as the number of the liquid outlet assemblies. Each outlet end of the micro valve 2 is connected with a corresponding nozzle 6, that is, in the same liquid outlet assembly, the outlet end of the micro valve 2 is connected with the nozzle 6. In the same liquid outlet assembly, the number of the micro valve 2 and the nozzle 6 is not limited. Each liquid outlet pipe 1 is arranged around the liquid suction pipe 5, in detail, the axis of the liquid suction pipe 5 is the reference axis, each liquid outlet pipe 1 is arranged outside the liquid suction pipe 5, and each liquid outlet pipe 1 is arranged at equal intervals around the axis of the liquid suction pipe 5.

[0043] As shown in Figure 6 , the jet direction of the nozzle 6 is configured to jet towards the outside of the surgical electrode, and when each nozzle 6 jets, the jet liquid converges at a set point, and the set point is located on the liquid suction path of the liquid suction pipe 5. Therefore, as shown in Figure 6 and Figure 7As shown, when the working part is in the vertical state, the liquid supply main pipe supplies physiological saline to each liquid outlet pipe 1, and the liquid outlet dynamic pressure of each liquid outlet pipe 1 meets the opening pressure of the micro valve 2. Subsequently, the physiological saline sprayed from the spray port 6 is sprayed towards the axis direction of the liquid suction pipe 5, and the suction force of the liquid suction pipe 5 sucks away the sprayed physiological saline, so that the physiological saline sprayed from the spray port 6 forms a semi-spherical shape. Similarly, as shown in Figure 6 and Figure 7 As shown, when the working part is in the curved state, it is assumed that only the liquid outlet dynamic pressure of the liquid outlet pipe 1 located on the curved outer side meets the opening pressure of the micro valve 2, so only the spray port 6 connected to the micro valve 2 corresponding to the liquid outlet pipe 1 on the curved outer side can spray physiological saline. At this time, under the action of the suction force of the liquid suction pipe 5, the physiological saline sprayed from the spray port 6 forms a fan shape. The present application is convenient for controlling the shape of the physiological saline sprayed from the spray port 6 by arranging the liquid outlet pipe 1 around the liquid suction pipe 5, so as to facilitate the adjustment of the unit cutting area of the surgical electrode cutting point. In other embodiments, the liquid suction channel responsible for absorbing physiological saline can also be arranged in a circular ring shape, each liquid outlet assembly and the spray port 6 are located inside the inner circle of the circular ring-shaped liquid suction channel, and the spray direction of the spray port 6 is sprayed towards the liquid suction path of the liquid suction channel. At this time, when all the spray ports 6 spray physiological saline, the sprayed physiological saline is in a circular ring shape under the suction of the liquid suction channel.

[0044] In this embodiment, as shown in Figure 1 and Figure 8 The liquid suction pipe 5 is provided with a plurality of partition strips 7, and the adjacent partition strips 7 are connected with an outer wall piece 8, and the partition strips 7, the outer wall piece 8 and the outer wall of the liquid suction pipe 5 cooperate to form the liquid outlet pipe 1. The communication point of the drainage channel 3 and the liquid outlet pipe 1 can be arranged on the partition strip 7, or the drainage channel 3 can be arranged in the partition strip 7, and one end of the drainage channel 3 extends to the side wall of the partition strip 7, so that the drainage channel 3 is in communication with the liquid outlet pipe 1. In order to facilitate the manufacture, the baffle 4, the liquid suction pipe 5 and the partition strip 7 are integrally formed by 3D printing of rubber. The present application connects the liquid outlet pipe 1 and the liquid suction pipe 5 compactly by the design of the partition strip 7 and the outer wall piece 8, which is convenient for the production and manufacture of the liquid outlet mechanism. In other embodiments, the liquid outlet pipe 1 and the liquid suction pipe 5 can also be composed of separate circular pipes.

[0045] In this embodiment, as shown in Figure 1 and Figure 7As shown in the figures, the outer wall sheet 8 is a metal sheet, which is configured as the negative pole of the surgical electrode and is electrically connected with the wire in the handle part. As the physiological saline is delivered in the liquid outlet pipe 1, the physiological saline has contacted the negative pole of the power supply during the process of being sprayed out of the spray port 6. The present application configures the outer wall sheet 8 as the metal sheet of the negative pole of the surgical electrode, without the need of additionally setting the negative pole wire for the conduction of the physiological saline, which helps to reduce the volume of the surgical electrode. In other embodiments, the outer wall sheet 8 can also be made of the same material as the separation strip 7, in which case the blocking sheet 4, the liquid suction pipe 5, the separation strip 7 and the outer wall sheet 8 are integrally formed. However, an additional wire needs to be set to be electrically connected with the physiological saline in the liquid outlet pipe 1, which can pass through the outer wall sheet 8 from the outside of the outer wall sheet 8 into the liquid outlet pipe 1.

[0046] In the present embodiment, as shown in the figures, Figure 1 and Figure 7 the separation strip 7 is detachably connected with the outer wall sheet 8. In detail, the separation strip 7 is provided with a clamping groove, and the outer wall sheet 8 is provided with a clamping block matched with the clamping groove, and a sealing element can be arranged between the clamping groove and the clamping block, or the clamping groove and the clamping block can be in interference fit. The outer wall sheet 8 is provided in multiple specifications, and the elastic modulus of the outer wall sheet 8 of each specification is different. The outer wall sheet 8 can be of the same material but different thickness, or of the same thickness but different material, or of different material and thickness. The present application has two beneficial effects by detachably connecting the separation strip 7 with the outer wall sheet 8. Firstly, when the outer wall sheet 8 is damaged, it can be replaced with a new one. Secondly, by replacing the outer wall sheet 8 with different elastic modulus, the bending sensitivity of the working part when the control assembly controls the working part to bend can be changed. In other embodiments, the separation strip 7 and the outer wall sheet 8 can also be integrally formed.

[0047] In the present embodiment, as shown in the figures, Figure 2 and Figure 3 the working part further comprises an electrode sheet 9 configured as the positive pole of the surgical electrode, which is arranged on the liquid suction path of the liquid suction pipe 5 and located on the side of the set point (converging point) of each spray port 6 towards the liquid suction pipe 5. The electrode sheet 9 is electrically connected with the wire in the handle part. The present application arranges the electrode sheet 9 on the liquid suction path of the liquid suction pipe 5, so that the physiological saline sprayed out of the spray port 6 can contact the electrode sheet 9 after being sucked by the liquid suction pipe 5, which has a simple structure and does not affect the physiological saline sprayed out of the spray port 6. In other embodiments, a plurality of electrode needles can be used to replace the electrode sheet 9, and the number of the electrode needles is the same as the number of the spray ports 6, with one electrode needle arranged near each spray port 6 and on the liquid path of the spray port 6. This can also make the physiological saline sprayed out of the spray port 6 contact the electrode needle as the positive pole of the surgical electrode, but the electrode needle will affect the physiological saline sprayed out of the spray port 6.

[0048] In the embodiment, as shown in Figures 1 to 4 the working part further comprises a ring-shaped block 10 which is matched with the outlet end of each liquid outlet pipe 1, each jet 6 is arranged on the ring-shaped block 10, and each micro valve 2 is arranged on the ring-shaped block 10, the number of the ring-shaped block 10 is one, and the ring-shaped block 10 can be made by a 3D printing process. The inner circular area of the ring-shaped block 10 is communicated with the liquid suction pipe 5, and the electrode sheet 9 is arranged in the inner circular area of the ring-shaped block 10. As shown in Figure 3 the ring-shaped block 10 can be clamped with the liquid outlet pipe 1, in detail, the outer wall sheet 8 extends the end surface of the liquid suction pipe 5 to form an extension, and one end of the liquid outlet pipe 1 is clamped into the recessed area of the ring-shaped block 10. Meanwhile, in order to further improve the connection stability of the liquid outlet pipe 1 and the ring-shaped block 10, the recessed area of the ring-shaped block 10 is further provided with an extension groove for accommodating the extension formed by the outer wall sheet 8, and the extension and the extension groove can be in interference fit or glued. Moreover, since the pipe wall of the liquid suction pipe 5 also enters the recessed area as part of the liquid outlet pipe 1, the liquid suction pipe 5 is directly communicated with the inner circular area of the ring-shaped block 10. In addition, when the surgical electrode is in cutting operation, the ring-shaped block 10 will inevitably contact the human tissue. In the present application, by arranging the electrode sheet 9 in the inner circular area of the ring-shaped block 10, the electrode sheet 9 will not scratch the healthy human tissue during the process of the working part into the human body and during the cutting operation of the surgical electrode. In other embodiments, the electrode sheet 9 can also slightly protrude from the end surface of the ring-shaped block 10.

[0049] In the embodiment, as shown in Figure 2 and Figure 3 the ring-shaped block 10 is provided with a fixing strip 11 which partially shields the radial section of the inner circular area of the ring-shaped block 10, and the electrode sheet 9 is fixed on the side of the fixing strip 11 which faces the liquid suction pipe 5, that is, the electrode sheet 9 is fixed on the side of the fixing strip 11 which faces the inside of the surgical electrode. When the surgical electrode is in cutting operation, since the shape of the human tissue is irregular, part of the protruding human tissue will enter the inner circular area of the ring-shaped block 10 during the cutting process. By fixing the electrode sheet 9 on the side of the fixing strip 11 which faces the liquid suction pipe 5, even if part of the human tissue enters the inner circular area of the ring-shaped block 10, it will only contact the fixing strip 11 and is not easy to contact the electrode sheet 9, so as not to easily cause the electrode sheet 9 to fall off. Once the electrode sheet 9 falls off, it is easy to fall into the human body, thereby causing harm to the human body. In other embodiments, in order to facilitate the fixation of the electrode sheet 9 on the fixing strip 11, the electrode sheet 9 can also be fixed on the side of the fixing strip 11 which faces the outside of the surgical electrode.

[0050] In the embodiment, as shown in Figure 4As shown, the fixing strips 11 are provided in plurality, the first ends of the fixing strips 11 are fixed on the inner wall of the inner circle of the ring-shaped block 10, and the second ends of the fixing strips 11 are gathered at the same convergence point and connected with each other. The electrode sheet 9 is arranged on the convergence point. The convergence point is located at the center of the inner circle region of the ring-shaped block 10, i.e. the convergence point is located on the axis of the inner circle of the ring-shaped block 10, and the fixing strips 11 are arranged at equal intervals. The present application provides space for the suction tube 5 to suck physiological saline through the gaps between the fixing strips 11, and prevents large pieces of meat formed after cutting from being mistakenly sucked into the suction tube 5 during the cutting process of the surgical electrode. In other embodiments, in order to maximize the suction force of the suction tube 5, only one fixing strip 11 can be provided. In other embodiments, a blocking net can be arranged in the inner circle region of the ring-shaped block 10 to shield the radial section of the inner circle of the ring-shaped block 10, and the electrode sheet 9 is fixed on the blocking net.

[0051] In the present embodiment, as shown in Figure 2 and Figure 3 , the fixing strips 11 are arc-shaped, and the second ends of the fixing strips 11 are located on the side away from the suction tube 5 of the first ends of the fixing strips 11. The present application fixes the electrode sheet 9 in the "concave area" composed of multiple fixing strips 11 by arranging the fixing strips 11 in arc shape, so that the electrode sheet 9 is almost wrapped by the fixing strips 11. Even if part of the protruding human tissue enters the inner circle region of the ring-shaped block 10 during the cutting process of the surgical electrode, the protruding human tissue will preferentially enter the area between the fixing strips 11 and the inner wall of the inner circle of the ring-shaped block 10, and is less likely to contact the electrode sheet 9, further preventing the electrode sheet 9 from being affected by the protruding human tissue and falling off. In addition, the arc-shaped fixing strips 11 also help to increase the strength of the fixing strips 11 and are less likely to break. In other embodiments, the fixing strips 11 can also be arranged in straight rod shape.

[0052] In the present embodiment, as shown in Figure 2 , the suction mechanism is connected to the end of the suction tube 5 away from the nozzle 6 in the surgical electrode of the present application. The suction mechanism is arranged in the handle part and is configured to provide suction force for the suction tube 5. At the same time, the suction force provided by the suction mechanism is adjustable. Therefore, the user of the surgical electrode of the present application can adjust the suction force of the suction mechanism to change the volume of physiological saline sprayed outside the ring-shaped block 10 from the nozzle 6. Especially when all the nozzles 6 are spraying physiological saline, by adjusting the suction force of the suction mechanism, the volume of the sprayed semi-spherical physiological saline can be changed, and thus the unit cutting area of the cutting point of the surgical electrode can be changed. In other embodiments, the suction mechanism can also be arranged to provide a non-adjustable suction force.

[0053] In summary, the present application, by virtue of the micro-valve 2 and the baffle 4, and by adjusting the liquid inlet pressure of the liquid outlet pipe 1, the number of the micro-valve 2 is opened when the surgical electrode is bent at the end, so that the cutting form of the surgical electrode can be adjusted, that is, the size of the cutting knife edge can be adjusted. By setting the splayed opening towards the inlet end of the liquid outlet pipe 1, unnecessary energy loss is reduced. By setting the liquid outlet pipe 1 around the liquid suction pipe 5, it is convenient to control the shape of the physiological saline sprayed by the nozzle 6. By designing the separation strip 7 and the outer wall piece 8, the connection between the liquid outlet pipe 1 and the liquid suction pipe 5 is compact. By configuring the outer wall piece 8 as the side wall of the liquid outlet pipe 1 as a metal sheet of the negative electrode of the surgical electrode, it helps to reduce the volume of the surgical electrode. By setting the separation strip 7 and the outer wall piece 8 to be detachably connected, it is convenient to maintain while adjusting the bending sensitivity of the working part. By setting the electrode piece 9 on the liquid suction path of the liquid suction pipe 5, the physiological saline sucked by the liquid suction pipe 5 after being sprayed by the nozzle 6 can be in contact with the electrode piece 9. By setting the electrode piece 9 in the inner circular area of the annular block 10, the electrode piece 9 will not scratch the healthy tissue of the human body. By fixing the electrode piece 9 on the side of the fixing strip 11 towards the liquid suction pipe 5, the electrode piece 9 is prevented from falling off. By setting the fixing strip 11, it prevents the large piece of meat formed after cutting from being mistakenly sucked into the liquid suction pipe 5 during the cutting process of the surgical electrode. By setting the arc-shaped fixing strip 11, it further prevents the electrode piece 9 from being affected by the protruding human tissue and falling off, and also helps to increase the strength of the fixing strip 11. By setting the liquid suction mechanism, the unit cutting area of the cutting point of the surgical electrode can be adjusted.

[0054] It should be emphasized that: the above is only the preferred embodiment of the present application, not any form of limitation on the present application, any simple modification, equivalent change and modification of the above embodiment according to the technical essence of the present application still belongs to the scope of the technical solution of the present application.

Claims

1. A liquid dispensing mechanism, characterized in that, It includes several liquid outlet components, each of which includes a liquid outlet pipe (1), a micro valve (2) connected to the outlet end of the liquid outlet pipe (1), and a discharge channel (3) connected to the liquid outlet pipe (1). Each of the aforementioned outlet pipes (1) has the same inlet dynamic pressure and is arranged around the reference axis; The inner wall of the liquid outlet pipe (1) is provided with several baffles (4), and the baffles (4) are arranged in a crisscross pattern along the axis of the liquid outlet pipe (1); The outlet pipe (1) is configured to bend along the reference axis, and the outlet dynamic pressure of the outlet pipe (1) located on the outside of the bend is greater than that of the outlet pipe (1) located on the inside of the bend. The micro valve (2) is configured to open when the liquid dynamic pressure reaches a set value; the liquid blocked by the micro valve (2) flows out from the discharge channel (3).

2. The liquid dispensing mechanism according to claim 1, characterized in that, The baffles (4) are arranged in a figure-eight shape, and the plane of the figure-eight shape is oriented toward the reference axis.

3. A surgical electrode, characterized in that, It includes a suction tube (5), a plurality of nozzles (6) and a liquid dispensing mechanism as described in claim 1 or 2; the outlet end of the microvalve (2) is connected to the corresponding nozzle (6); each of the liquid dispensing tubes (1) is arranged around the suction tube (5), and the axis of the suction tube (5) is the reference axis; the spraying direction of the nozzle (6) is configured to spray towards the outside of the surgical electrode, and when each of the nozzles (6) sprays liquid, the sprayed liquid converges towards a set point, and the set point is located on the suction path of the suction tube (5).

4. The surgical electrode according to claim 3, characterized in that, The suction tube (5) is provided with several partition strips (7), and an outer wall piece (8) is connected between adjacent partition strips (7). The partition strips (7), the outer wall piece (8) and the outer wall of the suction tube (5) cooperate to form the discharge tube (1).

5. The surgical electrode according to claim 4, characterized in that, The outer wall plate (8) is a metal plate and is configured as the negative electrode of the surgical electrode.

6. The surgical electrode according to claim 5, characterized in that, The separator (7) is detachably connected to the outer wall piece (8).

7. The surgical electrode according to claim 3, characterized in that, It also includes an electrode plate (9) configured as the positive electrode of the surgical electrode, the electrode plate (9) being disposed on the suction path of the suction tube (5), and the electrode plate (9) being located on the side of the set point facing the suction tube (5).

8. The surgical electrode according to claim 7, characterized in that, It also includes an annular block (10) that simultaneously cooperates with the outlet end of each of the liquid outlet pipes (1), each of the nozzles (6) is disposed on the annular block (10), the inner circle region of the annular block (10) is connected to the liquid suction pipe (5), and the electrode plate (9) is disposed in the inner circle region of the annular block (10).

9. The surgical electrode according to claim 8, characterized in that, The annular block (10) is provided with a fixing strip (11) that partially covers the inner circular area of ​​the annular block (10), and the electrode sheet (9) is fixed on the side of the fixing strip (11) facing the suction tube (5).

10. The surgical electrode according to claim 9, characterized in that, The fixing strip (11) is provided in a plurality of them. The first end of each fixing strip (11) is fixed on the inner wall of the inner circle of the annular block (10). The second ends of each fixing strip (11) converge at the same convergence point and are connected to each other. The electrode sheet (9) is disposed on the convergence point. The convergence point is located at the center of the inner circle region of the annular block (10). Each fixing strip (11) is arranged at equal intervals.

Images