Single-shot long-distance ultrasonic scissors with side-tilting cutting function

Abstract

The present invention discloses a single long-distance ultrasonic scissors with a side-tilting shearing function, comprising a first shaft component and a second shaft component, wherein the first shaft component comprises a first hand-held part and an elbow, and the second shaft component comprises a second hand-held part, a sleeve, and a waveguide rod, wherein the second hand-held part is provided with a transducer and a circuit board switch connected to the waveguide rod, wherein the sleeve passes through the bend of the elbow, and the two are pivotally connected; the blade of the waveguide rod extends from the port of the sleeve and extends forward in an arc shape, and is deflected and arranged in the sleeve, and the distal end of the elbow is a working section that is consistent with the curvature of the blade and can fit closely therewith. The present invention increases the length of the blade and extends it in an arc shape, thereby improving its overall strength, and deflects and arranges the waveguide rod so that the inner cutting surface forms an inclined structure, thereby ensuring close contact between the blade and the distal end of the working section, and ensuring the smoothness and integrity of the shearing.

Description

Technical Field

[0001] The invention relates to the technical field of medical devices, and in particular to an ultrasonic scissors with a single long-distance shearing effect. Background Art

[0002] The application of ultrasound in surgical operations usually involves converting and transmitting ultrasonic energy into biological tissues. The thermal effect of the mechanical vibrations generated by the ultrasound breaks the hydrogen bonds of tissue proteins and denatures and coagulates the proteins. In particular, the mechanical energy and thermal energy generated by the ultrasound are used to coagulate, stop bleeding, and cut tissues. In surgical instruments, the ultrasound generator (ultrasound equipment host) generates high-frequency electrical energy, which is converted into mechanical vibration energy through a transducer using piezoelectric materials or electromagnetically compressible materials, and the vibration energy is amplified and transmitted to the end of action (or the blade of the knife bar).

[0003] Ultrasonic scissors are currently the most commonly used surgical instruments in surgery. They have fast cutting speed, good hemostasis effect, simple operation, safety and convenience. Compared with the traditional mechanical scalpel, the use of ultrasonic scalpels in clinical practice can greatly shorten the operation time, reduce the patient's blood loss and blood transfusion, thereby reducing complications and surgical costs.

[0004] In existing ultrasonic scissors, the length of the operating end is generally short, and the cutting distance is short at one time, which brings great inconvenience to operation. If it is simply lengthened, the shearing strength will be insufficient due to the thinness of the shearing working end, and it will not be able to cut accurately. In addition, the existing sleeve is directly sleeved on the outside of the waveguide rod, and the pivot angle between the sleeve and the elbow is small, which makes the opening angle of the operating end limited and cannot adapt to thicker or more complex tissue structures, which brings great inconvenience to operation. Therefore, how to increase the length of the operating end while ensuring its shear strength is a problem that needs to be solved urgently. Summary of the invention

[0005] The purpose of the present invention is to overcome the shortcomings of the prior art and provide a single long-distance ultrasonic scissors with a side-tilting shearing function.

[0006] The purpose of the present invention is achieved through the following technical solutions:

[0007] A single-shot long-distance ultrasonic scissors with a side-tilting shearing function comprises a first shaft component and a second shaft component, wherein the first shaft component comprises a first hand-held portion and an elbow disposed at the distal end of the first hand-held portion, the second shaft component comprises a second hand-held portion, a sleeve disposed at the distal end of the second hand-held portion, and a waveguide rod inserted into the sleeve, a hollow accommodating chamber is formed inside the second hand-held portion, a transducer connected to the waveguide rod and a circuit board switch for controlling the energy of the transducer are disposed in the accommodating chamber, the sleeve passes through the bending part of the elbow, and the overlapping parts of the two sides of the first shaft component and the second shaft component are connected by a pin pivot, so that the first shaft component and the second shaft component form a scissor-type structure; the blade head of the waveguide rod extends from the port of the sleeve and extends forward in an arc shape, and the The waveguide rod is formed into a cutter head by extending from the port of the sleeve at the distal end of the waveguide rod and extending forward in an arc shape, and the tail of the sleeve is provided with a through hole deflected toward the first side of the cutter head, and a pin is passed through the through hole so that the deflection of the waveguide rod is limited in the sleeve; the distal end of the elbow is a working section with the same curvature as the cutter head, the distal end of the inner cutting surface is closer to the inner surface of the working section than its proximal end, and the first side of the inner cutting surface is closer to the inner surface of the working section than the second side; during shearing, the distal ends of the inner cutting surface and the inner surface of the working section contact first, and under the deformation of the cutter head, the inner cutting surface and the inner surface of the working section are gradually tightly fitted from the distal ends to the proximal ends of the two, and from the first side to the second side.

[0008] Preferably, the deflection angle δ is set according to the following formula [1]:

[0009]

[0010] Wherein: Lb is the bending deflection of the waveguide rod; D1 is the distance between the rotation center of the waveguide rod and the distal end of the cutter head,

[0011] The L b The value is obtained by the following formula [2]:

[0012]

[0013] Wherein, F is the shear pressure of the cutter head of the waveguide rod, the connection on the waveguide rod that is connected to the cutter head and supports it is regarded as a fixed end, L is the distance from the bent middle section of the cutter head to the connection, E is the elastic modulus of the waveguide rod cutter bar, and I is the inertia moment of the waveguide rod cutter bar;

[0014] The I is calculated by the following formula [3]:

[0015]

[0016] Wherein, D is the outer diameter of the blade head of the waveguide rod.

[0017] Preferably, the distance L is configured by the total length L' of the blade of the waveguide rod, the blade is curved, the first side of the blade is concave, and the second side of the blade is convex; the total length L' of the blade satisfies the following formula:

[0018]

[0019] Among them, a and y2 are coordinate coefficients of the reference point respectively, and the coordinates of the reference point are (-ay2, y2), specifically the intersection point of the ray generated with the cutting tip of the waveguide rod as the origin to the cutting rod of the waveguide rod, and the ray is parallel to the tangent line of the convex surface.

[0020] Preferably, the axis of the pin coincides with the axis of the sleeve, the inner surface of the working section extends obliquely from its proximal end to its distal end, with a tilt angle of 0.5°-2°, and when the inner cutting surface and the inner surface of the working section are in a non-clamped state, the vertical distance between the proximal end of the inner surface of the working section and the axis of the sleeve is greater than the vertical distance between the distal end and the axis of the sleeve.

[0021] Preferably, the axis of the pin does not coincide with the axis of the sleeve, and the axis of the pin is arranged close to the elbow; in the clamped state, the inner surface of the working section is parallel to the axis of the sleeve.

[0022] Preferably, an elastic pad is provided on the inner surface of the working section, a groove is provided at the axis of the inner surface of the working section, the back side of the elastic pad has a convex portion matching the groove, the convex portion is clamped in the groove, and the surface of the elastic pad is serrated.

[0023] Preferably, the sleeve is composed of a front sleeve and a rear sleeve, the rear sleeve is inserted from the tail end of the waveguide rod, and the through hole is arranged on the rear sleeve; the front sleeve is inserted from the distal end of the waveguide rod and fixedly connected to the rear sleeve, a limiting hole is provided at the connection between the front sleeve and the rear sleeve, hinge holes are provided on both sides of the bending part of the elbow, the limiting hole and the hinge hole are coaxial, and the two ends of the pin are respectively inserted into the hinge hole and the limiting hole, so that the sleeve and the elbow are pivotally connected.

[0024] Preferably, a notch is provided at the connection of the front sleeve and / or the rear sleeve, and when the front sleeve and the rear sleeve are connected as one, the notches are assembled in pairs to form the limiting holes.

[0025] Preferably, it also includes an interlocking button assembly electrically connected to the circuit board switch, the interlocking button assembly includes a first button, a second button and a connecting lever, the connecting lever includes at least a first connecting rod and a second connecting rod, one end of the first connecting rod and the second connecting rod are connected, and the other ends extend in the same direction, and the connecting lever uses the center point of the first connecting rod as a fulcrum, the first button and the second button are symmetrically arranged at the outer ends of the first connecting rod relative to the fulcrum, the extending end of the second connecting rod is a contact rod, and the contact rod is located between the two contact surfaces of the circuit board switch, and the two contact surfaces are respectively connected to the first button or the second button through the connecting lever.

[0026] Preferably, a support rod is provided between the first connecting rod and the second connecting rod, and two ends of the support rod are respectively connected to the center points of the first connecting rod and the second connecting rod.

[0027] Preferably, it also includes an interlocking button assembly electrically connected to the circuit board switch, the interlocking button assembly includes a first button, a second button and a rocker assembly, the rocker assembly consists of two abutting first rockers and second rockers, the first rocker arm is V-shaped, and a first support arm and a first connecting arm extend outward from its first rotation center; the second rocker arm is Y-shaped, and a second support arm, a second connecting arm and a contact arm extend from its second rotation center, the first button is arranged on the first support arm, and the second button is arranged on the second support arm, the inner surfaces of the extended ends of the first connecting arm and the second connecting arm abut against each other, and the contact arm is located between the two contact surfaces of the circuit board switch, and the two contact surfaces are respectively connected to the first button or the second button through the rocker assembly.

[0028] The beneficial effects of the present invention are mainly reflected in:

[0029] 1. The length of the cutter head is longer than the conventional length to meet the requirements of a longer shearing operation in one operation during surgery, and is extended in an arc shape to improve its overall strength. The waveguide rod is deflected so that the inner cutting surface, due to its arc structure, makes the distal end closer to the inner surface of the working section relative to its proximal end, forming an inclined structure to ensure close contact between the cutter head and the distal end of the working section, thereby ensuring close fit between the inner cutting surface and the inner surface of the working section, and ensuring the smoothness and integrity of the shearing;

[0030] 2. The inner surface of the working section is tilted so that the distance between the inner surface of the working section and the distal end of the inner cutting surface is smaller, further ensuring that the distal end of the two will first contact during shearing, thereby ensuring the shear force between the two;

[0031] 3. The pin is arranged toward one side of the elbow so that the distance between the inner surface of the working section and the inner cutting surface can be shortened without tilting, thereby ensuring the shear force between the two;

[0032] At the same time, such a setting can make the spacing between the inner cutting surface and the inner surface of the working section larger, so as to facilitate the operation of thicker or more complex structure tissues and save more effort;

[0033] 4. The structure of the side pins between the sleeve and the elbow makes the pivot connection between the sleeve and the elbow more flexible, and maximizes the opening angle of the inner cutting surface and the inner surface of the working section to facilitate the operation of thicker or more complex tissues;

[0034] 5. The arc-shaped structure of the cutter head can be deformed to a certain extent, so that when clamped, the inner cutting surface and the distal end of the inner surface of the working section contact each other first, and then the entire surface is gradually brought into close contact along the first side to the second side, effectively ensuring the close contact between the inner cutting surface and the inner surface of the working section and improving the stability and reliability of the operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] The technical solution of the present invention is further described below in conjunction with the accompanying drawings:

[0036] Figure 1 : A front view of a preferred embodiment of the present invention;

[0037] Figure 2 : Figure 1 Schematic diagram of the connecting lever;

[0038] Figure 3 : An end view of the present invention;

[0039] Figure 4 : A partial top view of the present invention;

[0040] Figure 5 : A partial schematic diagram of the first embodiment of the present invention;

[0041] Figure 6 : Figure 5 Sectional view along line AA;

[0042] Figure 6a-6d : Parameter diagram of the deflection angle δ of the present invention;

[0043] Figure 7 : A partial schematic diagram of a second embodiment of the present invention;

[0044] Figure 8 : Schematic diagram of the pin and elbow in the present invention;

[0045] Fig. 9 : A partial schematic diagram of the present invention;

[0046] Fig.10 : A schematic diagram of a first embodiment of the sleeve in the present invention;

[0047] Fig.11 : A schematic diagram of a second embodiment of the sleeve in the present invention;

[0048] Fig.12 : A schematic diagram of a third embodiment of the sleeve in the present invention;

[0049] Fig.13 : A cross-sectional view of a third embodiment of the present invention;

[0050] Fig.14 : Fig.13 Schematic diagram of the connecting lever in ;

[0051] Fig.15 : A cross-sectional view of a fourth embodiment of the present invention;

[0052] Fig.16 : Fig.15 Schematic diagram of the middle rocker arm assembly. DETAILED DESCRIPTION

[0053] The present invention will be described in detail below in conjunction with the specific embodiments shown in the accompanying drawings. However, these embodiments are not limited to the present invention, and any structural, methodological, or functional changes made by a person skilled in the art based on these embodiments are all within the scope of protection of the present invention.

[0054] In the description of the scheme, it should be noted that the terms "center", "up", "down", "left", "right", "front", "back", "vertical", "horizontal", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of description and simplified description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance. Moreover, in the description of the scheme, with the operator as a reference, the direction close to the operator is the proximal end, and the direction away from the operator is the distal end.

[0055] like Figures 1 to 16 As shown, the present invention discloses a single-shot long-distance ultrasonic scissors with a lateral shearing function, comprising a first shaft component and a second shaft component, wherein the first shaft component comprises a first hand-held portion 4 and an elbow 1 arranged at the distal end of the first hand-held portion 4, and the second shaft component comprises a second hand-held portion 5, a sleeve 3 arranged at the distal end of the second hand-held portion 5, and a waveguide rod 2 inserted into the sleeve 3.

[0056] A hollow accommodating chamber 100 is formed inside the second hand-held part 5, and the accommodating chamber 100 contains a transducer 6 connected to the waveguide rod 2 and a circuit board switch 7 for controlling the energy of the transducer 6. The sleeve 3 passes through the bend of the elbow 1, and the overlapping parts on both sides of the two are pivotally connected by a pin 8, so that the first axis member and the second axis member form a scissor structure.

[0057] The cutter head 201 of the waveguide rod 2 extends out from the port of the sleeve 3 and extends forward in an arc shape. The waveguide rod 2 is deflected and confined in the sleeve 3 by inserting a pin in the through hole 9 located at the tail of the sleeve 3. The through hole 9 deflects δ degrees toward the first side 2012 of the cutter head 201. The inner cutting surface 2011 of the cutter head 201 is inclined from the second side 2013 thereof to the first side 2012 thereof. The distal end of the elbow 1 is a working section 101 with the same arc as the cutter head 201. The distal end of the inner cutting surface 2011 is Compared with the proximal end of the working section 101, which is closer to the inner surface 1011 of the working section 101, the first side 2012 of the inner cutting surface 2011 is closer to the inner surface 1011 of the working section than the second side 2013; during shearing, the distal end of the inner cutting surface 2011 and the inner surface 1011 of the working section first contact each other, and under the deformation of the cutting head 201, the inner cutting surface 2011 and the inner surface 1011 of the working section gradually fit tightly from their distal ends to their proximal ends and from the first side 2012 to the second side 2013.

[0058] Specific as Figure 3 and Figure 6 As shown, there is a through hole 9 radially passing through the axes of the waveguide rod 2 and the sleeve 3, and a pin (not shown in the figure) is inserted into the through hole 9 to fasten the waveguide rod 2 and the sleeve 3. The through hole 9 is deflected δ degrees toward the first side 2012 so that the waveguide rod 2 is deflected and arranged in the sleeve 3, and the distal end of the inner cutting surface 2011 is closer to the inner surface 1011 of the working section than the proximal end thereof.

[0059] Combination Figure 6a-6d , the waveguide rod 2 is regarded as a cylindrical rod as a whole, the through hole 9 where the pin is installed is regarded as a fixed place, and the bent middle section of the waveguide rod 2 is regarded as a load application place. In the specific experiment, the outer diameter of the knife bar of the waveguide rod 2 is D = 2.6 mm, the shear pressure of the knife bar is F = 16N, and the force arm is the distance L from the bent middle section of the knife bar to the rotation axis a =3.25mm, the shear modulus is G = 35GPa, and the distance from the middle of the bending section of the shank to the through hole 9 is L = 70mm, then

[0060] Corner The torsional section coefficient is

[0061] The torque angle of the knife bar of the waveguide rod is calculated to be approximately θ=0.0008°. The θ torque angle is the angle at which the knife bar of the waveguide rod 2 twists around itself when subjected to force. According to the calculation results, the θ torque angle is particularly small and can be ignored.

[0062] The deformation of the cutter head 201 is mainly caused by bending deflection deformation. When the rotation center of the waveguide rod 2 is taken as the point, the distal end of the cutter head 201 is located on a circle with the rotation center as the center. The deformation of the cutter head 201 is equivalent to its rotation of a certain arc. If the waveguide rod 2 is installed in the opposite deflection direction, the deformation of the cutter head 201 during shearing can be offset, ensuring that the inner cutting surface 2011 of the cutter head 201 fits closely to the tissue.

[0063] Therefore, the cutter head 201 is regarded as a cylindrical rod cantilever as a whole, the support between the cutter head 201 and the waveguide rod 2 is regarded as a fixed end, the connection 202 on the waveguide rod 2 that is connected to the cutter head 201 and supports it is regarded as a fixed end, and the middle of the bend of the cutter head 201 is regarded as the load application point. According to the specific experimental data, the outer diameter D of the cutter head 201 is 2.6 mm, the shear pressure of the cutter head 201 is F=16N, the elastic modulus is E=105 GPa, and the distance L from the middle of the bend of the cutter head to the connection 202 is 25 mm.

[0064] Waveguide rod shank bending deflection Where I is the inertia moment of the waveguide rod, and the inertia moment I is

[0065]

[0066] The calculated bending deflection of the cutter head is approximately L b =0.35mm.

[0067] Reference Figure 6c , the pre-rotation amount of the cutter head shall not be less than its bending deflection deformation, so as to ensure that the front end of the cutter head is always deformed during operation, so that the inner cutting surface 2011 maintains a working state of close contact with the tissue. In the experiment, the distance D1 between the rotation center of the waveguide rod 2 and the distal end of the cutter head 201 is 13 mm, so

[0068] Pre-rotation angle of the cutter head 201 Wherein D1=13 mm, δ≈3°, the deflection angle of the through hole 9 relative to its vertical line in the preferred embodiment is preferably 3°, and in other feasible embodiments, the deflection angle of the through hole 9 is 1°-5°.

[0069] The distance L is configured by the total length L' of the blade of the waveguide rod, the blade is curved, the first side of the blade is concave, and the second side of the blade is convex; the total length L' of the blade satisfies the following formula:

[0070]

[0071] Among them, a and y2 are the coordinate coefficients of the reference point, and the coordinates of the reference point are (-ay2, y2), as shown in the following example: Figure 6d As shown,

[0072] The length of the waveguide rod is L', the inner diameter is H, the outer radius of the waveguide rod is R and r respectively, there are points 1, 2, 3 on the rod, point Q is the tangent point between the rod and tube 1, take point 1 as the origin of the coordinates, the rod is placed flat, then the coordinates of point 2 (x2, y2) are known, the center point R of the two arcs on the outer contour of the rod, point r and the coordinates (x R ,y R )、(x r ,y r ) and the radius R and r are known,

[0073] The equation of the straight line L1 passing through point 1 and point 3 is set to y = a*x, then the equation of the straight line L2 passing through point 3 and point Q is The distance from point 1 to line L2 is H, and the distance from point R to line L2 is R, that is,

[0074] a and b can be obtained jointly;

[0075] The equation of the line L3 passing through points 1 and 4 is The equation of the horizontal line L4 passing through point 2 is y=y2. When L3 and L4 intersect at point 4', the distance from point 4' to point 1 is the minimum value of L'.

[0076] The coordinates of point 4' are (-ay2,y2),

[0077] In this example, H=5, R=25, and the coordinates of point R are (-15.3, -18.4). Substituting them into the above equation, we can get L'≈28.

[0078] Under the structural setting that the inner cutting surface 2011 is deflected relative to the inner surface 1011 of the working section, the inner cutting surface 2011 will tilt from its proximal end to its distal end relative to the inner surface 1011 of the working section due to its arc-shaped structure, and the arc-shaped structure of the cutter head 2011 can be deformed to a certain extent, so that when clamped, the inner cutting surface and the distal end of the inner surface of the working section will first contact, and then the entire surface will gradually be in close contact along the extension direction of the two, which effectively ensures the close contact between the inner cutting surface 2011 and the inner surface 1011 of the working section, thereby improving the stability and smoothness of the operation.

[0079] In order to meet the shearing requirements for longer distances, the present invention is not less than 18 mm, preferably 20 mm; its arc diameter is 27-30 mm, preferably 28 mm (as described in the configuration process above). The length of the cutter head 201 is longer than the conventional length, so that it can meet the operational requirements of a single shearing of a longer distance, facilitate actual operation, and improve operational efficiency and the smoothness and integrity of shearing. Since the cutter head 201 is relatively slender, its arc-shaped structural setting improves the rigidity of the cutter head 201, so that it has sufficient shearing force from its distal end to its proximal end.

[0080] like Figure 5 The first embodiment of the present invention is shown in the figure. In the first embodiment, the axis of the pin 8 coincides with the axis of the sleeve 3, the inner surface 1011 of the working section extends obliquely from its proximal end to its distal end, and the inclination angle is 0.5°-2°. When the inner cutting surface 2011 and the inner surface 1011 of the working section are in a non-clamped state, the vertical distance between the proximal end of the inner surface 1011 of the working section and the axis of the sleeve 3 is greater than the vertical distance between the distal end and the axis of the sleeve 3. In this way, the distance between the inner cutting surface 2011 and the distal end of the inner surface 1011 of the working section is further shortened, so that when clamping and shearing, the inner cutting surface 2011 and the inner surface 1011 of the working section are gradually fitted and clamped from the distal end to the proximal end of the two along the extension direction of the two, effectively ensuring that the distal ends of the inner cutting surface 2011 and the inner surface 1011 of the working section also have sufficient shearing force, and the phenomenon of the distal ends of the two not fitting together will not occur.

[0081] like Figure 7 The second embodiment of the present invention is shown. The difference between the second embodiment and the first embodiment is that: in the second embodiment, the axis of the pin 8 does not coincide with the axis of the sleeve 3, and the axis of the pin 8 is arranged close to the elbow 1; in the clamped state, the inner surface 1011 of the working section is parallel to the axis of the sleeve 3. In the second embodiment, the inner surface 1011 of the working section does not need to be inclined to shorten the distance between its distal end and the distal end of the inner cutting surface 2011. The distance between the axis of the pin 8 and the axis of the sleeve 3 is within 0-1mm, preferably 0.3mm, and when the distance between the inner cutting surface 2011 and the distal end of the inner surface 1011 of the working section is consistent, the opening angle required between the first shaft member and the second shaft member in the second embodiment is smaller, which can save more effort.

[0082] like Figure 4 , Figure 5 , Fig. 9As shown, an elastic pad 14 is provided on the inner surface 1011 of the working section, a groove 103 is provided at the axis of the inner surface 1011 of the working section, and the back of the elastic pad 14 has a convex portion (not shown in the figure) matching the groove 103, the convex portion is clamped in the groove 103, and the surface of the elastic pad 14 is serrated. The elastic pad 14 is preferably made of silicone material, and the serrated structure on its surface can play a good anti-slip role and protect the inner cutting surface 2011 and the inner surface 1011 of the working section. The elastic pad 14 is clamped with the groove 103 by the convex portion on its back, so that the elastic pad 14 is easy to replace.

[0083] The sleeve 3 in the present invention is composed of a front sleeve 301 and a rear sleeve 302. The rear sleeve 302 is inserted from the tail end of the waveguide rod 2 and fixed to the waveguide rod 2 through the positioning pin. The front sleeve 301 is inserted from the distal end of the waveguide rod 2 and fixed to the rear sleeve 302. A limiting hole 303 is spliced ​​at the connection between the front sleeve 301 and the rear sleeve 302. Hinge holes 102 are provided on both sides of the bending part of the elbow 1. The limiting hole 303 and the hinge hole 102 are coaxial. The two ends of the pin 8 are respectively inserted into the hinge hole 102 and the limiting hole 303, so that the sleeve 3 and the elbow 1 are pivotally connected. The sleeve 3 is a split-tube structure consisting of the front sleeve 301 and the rear sleeve 302. On the one hand, it is convenient for installing the waveguide rod 2. On the other hand, a limiting hole 303 is provided at the connection between the front sleeve 301 and the rear sleeve 302 to be pivotally connected with the elbow 1, which is convenient for assembly and meets the requirements of a larger opening angle.

[0084] Further Figure 8 As shown, the inner end of the pin 8 is arranged in the limiting hole 303, and the outer end thereof is arranged in the hinge hole 102, and the inner end diameter of the pin 8 is larger than the outer end diameter thereof, forming a T-shape with a step surface 801, and the step surface 801 abuts against the inner wall of the elbow 1. Such a structure enables the inner wall of the elbow 1 to limit the pin 8, preventing the pin 8 from falling from the hinge hole 102, and no other structure is required to position the pin, which facilitates assembly, simplifies the structure, and saves costs. In other feasible embodiments, the pin 8 may also be of other suitable shapes.

[0085] like Fig.10 and Fig.11 As shown, the connection between the front sleeve 301 and the rear sleeve 302 is provided with notches respectively, and when the front sleeve 301 and the rear sleeve 302 are connected as one, the notches are combined in pairs to form the limiting hole 303. The notches can be any suitable shape such as semicircular, arc, square, irregular, etc. that can make the limiting hole 303 match the inner end of the pin 8.

[0086] Further Fig.12 As shown, the limiting hole 303 may also be provided at the connection of the front sleeve 301 or the rear sleeve 302 , and the limiting hole 303 may be in any suitable shape such as a circle, a square, or a U shape.

[0087] like Figure 1 , Figure 2 As shown, the interlocking button assembly includes a first button 10, a second button 11 and a connecting lever 12, the connecting lever 12 at least includes a first connecting rod 1201 and a second connecting rod 1202, one end of the first connecting rod 1201 and the second connecting rod 1202 are connected, and the other ends extend in the same direction, and the connecting lever 12 takes the center point of the first connecting rod 1201 as the fulcrum 1203, the first button 10 and the second button 11 are symmetrically arranged at the outer ends of the first connecting rod 1201 relative to the fulcrum 1203, the extending end of the second connecting rod 1202 is a contact rod, and the contact rod is located between the two contact surfaces 701 of the circuit board switch 7, and the two contact surfaces 701 are respectively connected to the first button 10 or the second button 11 through the connecting lever 12.

[0088] like Fig.13 , Fig.14 As shown, in order to further improve the synchronization between the first connecting rod 1201 and the second connecting rod 1202, a support rod 1204 is provided between the first connecting rod 1201 and the second connecting rod 1202, and the two ends of the support rod 1204 are respectively connected to the center points of the first connecting rod 1201 and the second connecting rod 1202.

[0089] like Fig.15 , Fig.16 The figure shows another embodiment of the interlocking button assembly, which includes a first button 10, a second button 11 and a rocker assembly 13, wherein the rocker assembly is composed of two abutting first rockers and second rockers, wherein the first rocker is V-shaped, and a first support arm 1302 and a first connecting arm 1303 extend outwardly from its first rotation center 1301; the second rocker is Y-shaped, and a second support arm 1305, a second connecting arm 1306 and a contact arm 1307 extend from its second rotation center 1304, the first button 10 is arranged on the first support arm 1302, the second button 11 is arranged on the second support arm 1305, the inner surfaces of the extended ends of the first connecting arm 1303 and the second connecting arm 1306 are abutted, and the contact arm 1307 is located between the two contact surfaces 701 of the circuit board switch 7, and the two contact surfaces 701 are respectively connected to the first button 10 or the second button 11 through the rocker assembly 13.

[0090] The setting of the interlocking button assembly not only satisfies the interlocking between the first button 10 and the second button 11, so that the first button 10 and the second button 11 can switch between high and low working gears, but also increases the creepage distance to meet the safety setting requirements.

[0091] It should be understood that although this specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each implementation mode may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

[0092] The series of detailed descriptions listed above are only specific descriptions of feasible implementation methods of the present invention. They are not intended to limit the scope of protection of the present invention. Any equivalent implementation methods or changes that do not deviate from the technical spirit of the present invention should be included in the scope of protection of the present invention.

Claims

1. Single long-distance ultrasonic scissors with tilt shearing function, characterized by: The invention comprises a first shaft component and a second shaft component, wherein the first shaft component comprises a first hand-held part (4) and an elbow (1) arranged at the distal end of the first hand-held part (4), and the second shaft component comprises a second hand-held part (5), a sleeve (3) arranged at the distal end of the second hand-held part (5), and a waveguide rod (2) inserted into the sleeve (3); a hollow accommodating cavity (100) is formed inside the second hand-held part (5), and a transducer (6) connected to the waveguide rod (2) and a control device (100) are built in the accommodating cavity (100). The circuit board switch (7) of the transducer (6) energy size, the sleeve (3) passes through the bend of the elbow (1), and the overlapping parts of the two sides are pivotally connected by a pin (8), so that the first shaft component and the second shaft component form a scissor structure; the blade (201) of the waveguide rod (2) extends from the end of the sleeve (3) and extends forward in an arc shape, and the waveguide rod (2) is deflected and limited in the sleeve (3) by passing a pin through a through hole (9) located at the tail of the sleeve (3), and the through hole (9) the inner cutting surface (2011) of the cutter head (201) is tilted from the second side (2013) to the first side (2012); the distal end of the elbow (1) has a working section (101) having the same curvature as the cutter head (201); the distal end of the inner cutting surface (2011) is closer to the inner surface (1011) of the working section (101) than the proximal end thereof; and the first side of the inner cutting surface (2011) is inclined from the second side (2013) to the first side (2012). (2012) is closer to the inner surface (1011) of the working section than the second side (2013); during shearing, the distal ends of the inner cutting surface (2011) and the inner surface (1011) of the working section first come into contact, and under the deformation of the cutter head (201), the inner cutting surface (2011) and the inner surface (1011) of the working section gradually fit tightly from their distal ends to their proximal ends and from the first side (2012) to the second side (2013); the deflection angle δ is set according to the following formula [1]: Wherein: Lb is the bending deflection of the waveguide rod blade; D1 is the distance between the rotation center of the waveguide rod (2) and the distal end of the blade head (201), The L b The value is obtained by the following formula [2]: Wherein, F is the shearing pressure of the cutter head (201) of the waveguide rod (2), the connection (202) on the waveguide rod (2) that is connected to the cutter head (201) and supports it is regarded as a fixed end, L is the distance from the bent middle section of the cutter head (201) to the connection (202), E is the elastic modulus of the waveguide rod cutter, and I is the moment of inertia of the waveguide rod cutter; The I is calculated by the following formula [3]: Wherein, D is the outer diameter of the cutter head (201) of the waveguide rod (2).

2. The single-shot long-distance ultrasonic scissors with tilt shearing function according to claim 1, characterized in that: The distance L is configured by the total length L' of the blade of the waveguide rod (2); the blade (201) is curved, the first side (2012) of the blade (201) is a concave surface, and the second side (2013) of the blade (201) is a convex surface; the total length L' of the blade satisfies the following formula: Wherein, a and y2 are coordinate coefficients of a reference point, respectively. The coordinates of the reference point are (-ay2, y2), specifically, the intersection point of a ray generated with the tip of the cutting head (201) of the waveguide rod (2) as the origin to the cutting rod of the waveguide rod (2), and the ray is parallel to the tangent line of the second side (2013).

3. The single-shot long-distance ultrasonic scissors with tilt shearing function according to claim 1, characterized in that: The axis of the pin (8) coincides with the axis of the sleeve (3); the inner surface (1011) of the working section extends obliquely from its proximal end to its distal end, with a tilt angle of 0.5°-2°; when the inner cutting surface (2011) and the inner surface (1011) of the working section are in a non-clamped state, the vertical distance between the proximal end of the inner surface (1011) of the working section and the axis of the sleeve (3) is greater than the vertical distance between the distal end and the axis of the sleeve (3).

4. The single-shot long-distance ultrasonic scissors with tilt shearing function according to claim 1, characterized in that: The axis of the pin (8) does not coincide with the axis of the sleeve (3), and the axis of the pin (8) is arranged close to the elbow (1); in the clamped state, the inner surface (1011) of the working section is parallel to the axis of the sleeve (3).

5. The single-shot long-distance ultrasonic scissors with tilt shearing function according to claim 1, characterized in that: An elastic pad (14) is arranged on the inner surface (1011) of the working section, a groove (103) is arranged at the axis of the inner surface (1011) of the working section, the back side of the elastic pad (14) has a convex portion matching the groove (103), the convex portion is clamped in the groove (103), and the surface of the elastic pad (14) is serrated.

6. The single-shot long-distance ultrasonic scissors with tilt shearing function according to claim 3 or 4, characterized in that: The sleeve (3) is composed of a front sleeve (301) and a rear sleeve (302), the rear sleeve (302) is inserted from the tail end of the waveguide rod (2), and the through hole (9) is arranged on the rear sleeve (302); the front sleeve (301) is inserted from the distal end of the waveguide rod (2) and is fixedly connected to the rear sleeve (302), a limiting hole (303) is arranged at the connection between the front sleeve (301) and the rear sleeve (302), hinge holes (102) are arranged on both sides of the bending part of the elbow (1), the limiting hole (303) and the hinge hole (102) are coaxial, and the two ends of the pin (8) are respectively inserted into the hinge hole (102) and the limiting hole (303), so that the sleeve (3) and the elbow (1) are pivotally connected.

7. The single-shot long-distance ultrasonic scissors with tilt shearing function according to claim 6, characterized in that: A notch is provided at the connection of the front sleeve (301) and / or the rear sleeve (302); when the front sleeve (301) and the rear sleeve (302) are connected as one, the notches are joined in pairs to form the limiting holes (303).

8. The single-shot long-distance ultrasonic scissors with tilt shearing function according to claim 1, characterized in that: The invention also comprises an interlocking button assembly electrically connected to the circuit board switch (7), the interlocking button assembly comprising a first button (10), a second button (11) and a connecting lever (12), the connecting lever (12) comprising at least a first connecting rod (1201) and a second connecting rod (1202), one end of the first connecting rod (1201) and the second connecting rod (1202) being connected, and the other end extending in the same direction, and the connecting lever (12) takes the center point of the first connecting rod (1201) as a fulcrum (1203), the first button (10) and the second button (11) being symmetrically arranged at the two outer ends of the first connecting rod (1201) relative to the fulcrum (1203), the extending end of the second connecting rod (1202) being a contact rod, the contact rod being located between two contact surfaces (701) of the circuit board switch (7), and the two contact surfaces (701) being respectively connected to the first button (10) or the second button (11) through the connecting lever (12).

9. The single-shot long-distance ultrasonic scissors with tilt shearing function according to claim 8, characterized in that: A support rod (1204) is provided between the first connecting rod (1201) and the second connecting rod (1202), and two ends of the support rod (1204) are respectively connected to the center points of the first connecting rod (1201) and the second connecting rod (1202).

10. The single-shot long-distance ultrasonic scissors with tilt shearing function according to claim 1, characterized in that: The invention also comprises an interlocking button assembly electrically connected to the circuit board switch (7), the interlocking button assembly comprising a first button (10), a second button (11) and a rocker assembly (13), the rocker assembly comprising two abutting first rockers and a second rocker arm, the first rocker arm being V-shaped, with a first support arm (1302) and a first connecting arm (1303) extending outward from a first rotation center (1301); the second rocker arm being Y-shaped, with a second support arm (1305), a second connecting arm (1306) and a second rotating center (1307) extending outward from a second rotation center (1308). The circuit board switch (7) comprises a first supporting arm (1306) and a contact arm (1307), wherein the first button (10) is arranged on the first supporting arm (1302), and the second button (11) is arranged on the second supporting arm (1305), and the inner surfaces of the extended ends of the first connecting arm (1303) and the second connecting arm (1306) are in contact with each other, and the contact arm (1307) is located between the two contact surfaces (701) of the circuit board switch (7), and the two contact surfaces (701) are respectively connected to the first button (10) or the second button (11) through the rocker arm assembly (13).

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