WO2023071072A1

WO2023071072A1 - Single-time long-distance ultrasonic scissors having roll shearing function

Info

Publication number: WO2023071072A1
Application number: PCT/CN2022/087017
Authority: WO
Inventors: 张坤; 王磊; 刘柯; 夏中贤; 刘振中; 骆威
Original assignee: 以诺康医疗科技（苏州）有限公司
Priority date: 2021-10-28
Filing date: 2022-04-15
Publication date: 2023-05-04
Also published as: CN113907848A

Abstract

Single-time long-distance ultrasonic scissors having a roll shearing function, comprising a first shaft member and a second shaft member, wherein the first shaft member comprises a first handheld portion (4) and a bending head (1); and the second shaft member comprises a second handheld portion (5), a pipe sleeve (3) and a waveguide rod (2), the second handheld portion (5) being internally provided with a transducer (6) connected to the waveguide rod (2) and with a circuit board switch (7), the pipe sleeve (3) passing through a bending position of the bending head (1), and the pipe sleeve being pivotally connected to the bending head; and a cutter head (201) of the waveguide rod (2) extends out of an end port of the pipe sleeve (3) and extends forward in an arc shape, the waveguide rod is arranged in the pipe sleeve (3) in a deflecting manner, and a distal end of the bending head (1) is a working section (101) that is consistent with the cutter head (201) in radian and can be closely fitted with same. The cutter head (201) is lengthened and is made to extend in the arc shape so as to improve the overall strength thereof. The waveguide rod (2) is arranged in the deflecting manner such that an inner cutting surface (2011) of the cutter head (201) forms an inclined structure to ensure the close contact between distal ends of the cutter head (201) and the working section (101), which ensures the smoothness and integrity of shearing.

Description

Single-shot long-reach ultrasonic scissors with side-tilt shear

technical field

The invention relates to the technical field of medical instruments, in particular to an ultrasonic scissors with a single long-distance shearing effect.

Background technique

The application of ultrasound in surgical operations is usually to convert and transmit ultrasonic energy into biological tissue, which generates thermal effects of mechanical vibrations to break tissue protein hydrogen bonds, protein denaturation and solidification, especially the use of mechanical and thermal energy generated by it to coagulate tissues, Hemostasis and cutting etc. In surgical instruments, the ultrasonic generator (ultrasonic equipment host) generates high-frequency electric energy, and the high-frequency electric energy is converted into mechanical vibration energy through the transducer using piezoelectric material or electromagnetic compression material, and the vibration energy is amplified Transfer to the end of action (or the tip of the tool holder).

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

In the existing ultrasonic scissors, the length of the operating end is generally short, and the cutting distance at one time is relatively short, which brings great inconvenience to the operation, and if it is simply lengthened, the shearing strength will be insufficient because the cutting working end is relatively slender. , cannot be precisely cut. In addition, the existing sleeve is directly sleeved on the outside of the waveguide, and the pivot angle between the sleeve and the elbow is small, so that the opening angle of the operating end is limited, which cannot adapt to thicker or more complex tissue structures, giving Operation brings great inconvenience. Therefore, how to increase the length of the operating end while ensuring its shear strength is an urgent problem to be solved at present.

Contents of the invention

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

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

A single long-distance ultrasonic scissors with a side tilting shearing function, comprising a first shaft member and a second shaft member, the first shaft member includes a first handle and a distal end of the first handle Elbow, the second shaft member includes a second handle, a sleeve arranged at the distal end of the second handle, and a waveguide rod inserted in the sleeve, the second handle A hollow accommodation cavity is formed in the interior of the housing, and a transducer connected to the waveguide rod and a circuit board switch for controlling the energy of the transducer are built in the accommodation cavity, and the sleeve passes through the bend The bending part of the head, and the overlapping parts of the two sides are pivotally connected by pins, so that the first shaft member and the second shaft member form a scissor structure; the cutter head of the waveguide rod is connected from the The port protrudes and extends forward in an arc shape, and the waveguide rod protrudes from the port of the sleeve at the far end of the waveguide rod and extends forward in an arc shape to form a cutter head. The tail of the tube is provided with a through hole that deflects to 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 The working section with the same radian of the cutter head, the distal end of the inner cutting surface is closer to the inner surface of the working section of the working section than the proximal end thereof, and the first side of the inner cutting surface is closer to the inner surface of the working section than the second The side is closer to the inner surface of the working section; when shearing, the inner cutting surface and the distal end of the inner surface of the working section first contact, and under the deformation of the cutter head, the inner cutting surface and the inner surface of the working section From the distal end of the two to the proximal end of the two, and from the first side to the second side, they are gradually fitted tightly together.

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

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

The value of L _b is determined by the following formula [2]:

Among them, F is the shear pressure of the cutter head of the waveguide rod, the connection between the waveguide rod and the cutter head and supporting it is regarded as a fixed end, and L is the bending middle section of the cutter head to the connection The distance, E is the modulus of elasticity of the waveguide rod cutter bar, and I is the moment of inertia of the waveguide rod cutter rod;

The I is valued by the following formula [3]:

Wherein, D is the outer diameter of the cutter head of the waveguide rod.

Preferably, the distance L is configured by the total length L' of the cutter head of the waveguide rod, the cutter head is curved, the first side of the cutter head is concave, and the second side of the cutter body is convex; The total length L' of the cutter head satisfies the following formula:

Wherein, a and y ₂ are the coordinate coefficients of the reference point respectively, and the coordinates of the reference point are (-ay ₂ , y ₂ ), specifically, the ray generated with the cutter tip of the waveguide rod as the origin to the waveguide At the point of intersection of the shank of the bar, the ray is parallel to the tangent to the convex surface.

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 side inclination angle of 0.5°-2°, and the inner cutting surface and When the inner surface of the working section is in an unclamped state, the vertical distance between the proximal end of the inner surface of the working section and the axis of the cannula is greater than the vertical distance between the distal end of the inner surface and the axis of the cannula.

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

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, and the back of the elastic pad has a protrusion matching the groove, and the protrusion The part is clamped in the groove, and the surface of the elastic pad is serrated.

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 The front sleeve is inserted from the far end of the waveguide rod and fixedly connected with the rear sleeve, the connection between the front sleeve and the rear sleeve is provided with a limit hole, and the two sides of the bend of the elbow A hinge hole is provided, the limit hole is coaxial with the hinge hole, and the two ends of the pin are respectively penetrated in the hinge hole and the limit hole, so that the pipe sleeve and the elbow are pivotally connected.

Preferably, a notch is provided at the junction of the front sleeve and/or the rear sleeve, and when the front sleeve and the rear sleeve are connected into one body, the notches are combined in pairs to form the limiting hole.

Preferably, it also includes an interlocking button assembly electrically connected with the circuit board switch, the interlocking button assembly includes a first button, a second button and a connecting lever, and the connecting lever includes at least a first connecting rod and a The second connecting rod, one end of the first connecting rod and the second connecting rod are connected, and the other end extends in the same direction, and the connecting lever takes the center point of the first connecting rod as a fulcrum, and the first button and The second button is symmetrically arranged on the outer two ends of the first connecting rod relative to the fulcrum, and the extension 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 Between, the two contact surfaces are respectively connected to the first button or the second button through the connecting lever.

Preferably, a supporting rod is provided between the first connecting rod and the second connecting rod, and both ends of the supporting rod are respectively connected to the central points of the first connecting rod and the second connecting rod.

Preferably, it also includes an interlocking button assembly electrically connected with the circuit board switch, the interlocking button assembly includes a first button, a second button and a rocker arm assembly, and the rocker arm structure is formed by two abutting Composed of the first rocker arm and the second rocker arm, the first rocker arm is V-shaped, with a first arm and a first connecting arm extending outward from its first rotation center; the second rocker arm is Y-shaped, extending from its second rotation center with a second arm, a second connecting arm and a contact arm, the first button is arranged on the first arm, and the second button is arranged on the first Two arms, the inner surfaces of the extension ends of the first connecting arm and the second connecting arm abut against each other, the contact arm is located between the two contact surfaces of the circuit board switch, and the two contact surfaces pass through the two contact surfaces respectively. The rocker arm assembly is connected to the first button or the second button.

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

1. The length of the cutter head is lengthened compared with the conventional length to meet the requirement of a longer cutting operation during one operation, and it extends in an arc shape to improve its overall strength, and the waveguide rod is deflected so that Due to its arc-shaped structure, the inner cutting surface makes the distal end closer to the inner surface of the working section relative to its proximal end, forming an inclined structure to ensure the close contact between the cutter head and the distal end of the working section, thereby ensuring the inner cutting surface and the working section The tight fit between the inner surfaces of the segments ensures the smoothness and integrity of the shearing;

2. The inner surface of the working section is inclined, so that the distance between the inner surface of the working section and the distal end of the inner cutting surface is smaller, so as to further ensure that the two contact from the far end first when shearing, and ensure the shearing distance between the two. cut force;

3. Set the pins to the side of the elbow, so that the inner surface of the working section can shorten the distance between it and the inner cutting surface without tilting, so as to ensure the shear force between the two; at the same time, this setting can make the inner surface The opening distance between the cutting surface and the inner surface of the working section is larger to facilitate the operation of thicker or more complex structures and save effort;

4. The structure of pins pierced on the side is adopted between the casing and the elbow, which makes the pivot connection between the casing and the elbow more flexible, and expands the opening angle of the inner cutting surface and the inner surface of the working section as much as possible. Facilitate manipulation of thicker or more complex structures;

5. The arc-shaped structure of the cutter head can be deformed to a certain extent, so that when clamping, the inner cutting surface and the distal end of the inner surface of the working section contact first, and then gradually realize the entire cutting along the first side to the second side. The close contact between the inner cutting surface and the inner surface of the working section effectively ensures the close contact between the inner cutting surface and the inner surface of the working section, improving the stability and reliability of the operation.

Description of drawings

Below in conjunction with accompanying drawing, technical solution of the present invention will be further described:

Fig. 1: the front view of preferred embodiment of the present invention;

Figure 2: Schematic diagram of the connecting levers in Figure 1;

Figure 3: End view of the present invention;

Fig. 4: partial top view of the present invention;

Fig. 5: partial schematic diagram of the first embodiment of the present invention;

Figure 6: A sectional view along line A-A in Figure 5;

Figures 6a-6d: Schematic diagrams of the parameters of the deflection angle δ in the present invention;

Fig. 7: partial schematic diagram of the second embodiment of the present invention;

Fig. 8: the schematic diagram of pin and elbow in the present invention;

Figure 9: Partial schematic diagram of the present invention;

Figure 10: a schematic diagram of the first embodiment of the casing in the present invention;

Figure 11: Schematic diagram of the second embodiment of the casing in the present invention;

Fig. 12: a schematic diagram of a third embodiment of the casing in the present invention;

Fig. 13: the sectional view of the third embodiment of the present invention;

Figure 14: A schematic diagram of the connecting lever in Figure 13;

Figure 15: a sectional view of a fourth embodiment of the present invention;

Figure 16: Schematic of the rocker arm assembly in Figure 15.

Detailed ways

The present invention will be described in detail below in conjunction with specific embodiments shown in the accompanying drawings. However, these embodiments are not limited to the present invention, and structural, method, or functional changes made by those skilled in the art according to these embodiments are included within the protection scope of the present invention.

In the description of the scheme, it should be noted that the terms "center", "upper", "lower", "left", "right", "front", "rear", "vertical", "horizontal", " The orientation or positional relationship indicated by "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of description and simplification of description, rather than indicating or implying that the device or element referred to must have a specific orientation , constructed and operated in a particular orientation and therefore should not be construed as limiting the invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and should not be construed as indicating or implying relative importance. Moreover, in the description of the solution, 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.

As shown in Figures 1 to 16, the present invention discloses a single-shot long-distance ultrasonic scissors with a side tilting shearing function, including a first shaft member and a second shaft member, the first shaft member includes a first hand-held part 4 and the elbow 1 arranged at the distal end of the first handle part 4, the second shaft member includes a second handle part 5, a sleeve 3 arranged at the distal end of the second handle part 5, The waveguide rod 2 pierced through the sleeve 3 .

A hollow accommodating chamber 100 is formed inside the second handle 5, and the accommodating chamber 100 is equipped with a transducer 6 connected to the waveguide rod 2 and a device for controlling the energy of the transducer 6. The circuit board switch 7, the sleeve 3 passes through the bend of the elbow 1, and the overlap of the two sides is pivotally connected by a pin 8, so that the first shaft member and the second shaft member form a Scissor structure.

The cutter head 201 of the waveguide rod 2 protrudes from the port of the sleeve 3 and extends forward in an arc shape. The deflection is limited in the sleeve 3, the through hole 9 is deflected by δ degrees to the first side 2012 of the cutter head 201, the inner cutting surface 2011 of the cutter head 201 is from its second side 2013 to its first The side 2012 is inclined; the far end of the elbow 1 is the working section 101 consistent with the radian of the cutter head 201, and the far end of the inner cutting surface 2011 is closer to the working section 101 than its proximal end. Section inner surface 1011, the first side 2012 of the inner cutting surface 2011 is closer to the working section inner surface 1011 than the second side 2013; when shearing, the inner cutting surface 2011 and the working section inner surface 1011 The distal end contacts first, and under the deformation of the cutter head 201, the inner cutting surface 2011 and the inner surface 1011 of the working section move from the distal end to the proximal end, from the first side 2012 to the The second side 2013 is gradually fitted tightly.

Specifically as shown in Figure 3 and Figure 6, there is a through hole 9 radially penetrating the axes of the two between the waveguide rod 2 and the sleeve 3, and a pin (not shown in the figure) is pierced in the through hole 9 out) to fasten the waveguide rod 2 and the sleeve 3, the through hole 9 deflects δ degrees to the first side 2012 so that the waveguide rod 2 is deflected and arranged in the sleeve 3, and the inner cutting surface 2011 The distal end of is closer to the inner surface 1011 of the working section than the proximal end thereof.

In combination with Figures 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 middle section of the waveguide rod 2 is regarded as a place where a load is applied. In the specific experiment, the The outer diameter of the cutter rod of the waveguide rod 2 is D=2.6mm, the shear pressure of the cutter rod is F=16N, the force arm is taken as the distance from the middle section of the cutter rod to the rotation axis L _a =3.25mm, and the shear modulus is G=35GPa , the distance from the middle section of the tool bar bending to the through hole 9 is L=70mm, then there is

corner

where the torsional section coefficient is

The calculated torque rotation angle of the cutter bar of the waveguide rod is about θ=0.0008°, and the θ torque rotation angle is the angle at which the cutter rod of the waveguide rod 2 twists around itself when it is stressed. According to the calculation results, the θ torque rotation angle is particularly small , so it is ignored.

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 a circle point, and the distal end of the cutter head 201 is located on a circle centered on the rotation center, the cutter The deformation of the head 201 is equivalent to its rotation by a certain radian. If the waveguide 2 is installed in the opposite deflection direction, the deformation of the cutter head 201 during the shearing work can be offset to ensure that the inner cutting surface 2011 of the cutter head 201 fits closely with the tissue .

Therefore, the cutter head 201 is regarded as a cylindrical rod cantilever as a whole, and the support between the cutter head 201 and the waveguide rod 2 is regarded as a fixed end, and the waveguide rod 2 is connected with the cutter head 201 and supports it. The joint 202 of the cutter head 201 is regarded as a fixed end, and the middle part of the bending of the cutter head 201 is regarded as a place where a load is applied. According to the specific data of the experiment, wherein the outer diameter D=2.6mm of the cutter head 201, the shear pressure of the cutter head 201 F=16N, the modulus of elasticity is E=105GPa, the distance from the middle section of the cutter head to the joint 202 is L=25mm, then the bending deflection of the waveguide rod cutter rod

Among them, I is the moment of inertia of the waveguide rod and cutter bar, and the moment of inertia I is

It is calculated that the bending deflection of the cutter head is about L _b =0.35mm.

Referring to Figure 6c, the amount of pre-rotation of the cutter head must not be less than the amount of bending deflection deformation, so as to ensure that the front end of the cutter head is always deformed during work, so that the inner cutting surface 2011 remains in close contact with the tissue. state. In the experiment, the distance D1 from the center of rotation of the waveguide 2 to the distal end of the cutter head 201 is 13 mm, then

Pre-rotation angle of cutter head 201

Where D1=13mm, δ≈3°, the deflection angle of the through hole 9 in the preferred embodiment is preferably 3° relative to its vertical line, and in other feasible embodiments, the deflection angle of the through hole 9 1°-5°.

The distance L is configured by the total length L' of the cutter head of the waveguide rod, the cutter head is curved, the first side of the cutter head is a concave surface, and the second side of the cutter body is a convex surface; the cutter head The total length L' satisfies the following formula:

Wherein, a and y ₂ are the coordinate coefficients of the reference point respectively, and the coordinates of the reference point are (-ay ₂ , y ₂ ), specifically as shown in Figure 6d,

The length of the waveguide rod is L', the inner diameter is H, and the outer expansion radii of the waveguide rod are R and r respectively. There are

points

1, 2, and 3 on the cutter rod. Point Q is the tangent point between the cutter rod and the tube 1. Take the point 1 is the origin of the coordinates, and the tool bar is placed flat, then the coordinates (x ₂ , y ₂ ) of point 2 are known, and the center point R, point r, and coordinates (x _R , y _R ) and ( x _r , y _r ) and radius R, r known,

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 straight line L2 is H, and the distance from point R to straight line L2 is R, namely

A and b can be obtained simultaneously;

The equation of the straight line L3 passing through point 1 and point 4 is

The equation of the horizontal straight line L4 passing through point 2 is y=y ₂ , when L3 and L4 intersect at point 4', the distance from point 4' to point 1 is the minimum value of L',

The coordinates of point 4' are (-ay ₂ ,y ₂ ),

In this example, H=5, R=25, and the coordinates of point R are (-15.3, -18.4). Substituting into the above formula for solution, L'≈28 can be obtained.

Under the structural setting that the inner cutting surface 2011 deflects relative to the inner surface 1011 of the working section, the inner cutting surface 2011 will be inclined 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 clamping, the inner cutting surface and the distal end of the inner surface of the working section contact first, and then gradually realize the entire surface along the extending direction of the two. The close contact effectively ensures the close contact between the inner cutting surface 2011 and the inner surface 1011 of the working section, improving the stability and fluency of the operation.

In the present invention, in order to meet the shear requirement of a longer distance, it is not less than 18mm, preferably 20mm; its arc diameter is 27-30mm, preferably 28mm (as in the configuration process above). The length of the cutter head 201 has been lengthened compared with the conventional length, so as to meet the operation requirement of a single cutting with a longer distance, facilitate the actual operation, and improve the operation efficiency and the fluency and integrity of the cutting. Since the cutter head 201 is relatively slender, its arc-shaped structure improves the rigidity of the cutter head 201, so that the distal end and the proximal end thereof have sufficient shearing force.

As shown in Figure 5, it is the first embodiment of the present invention. In the first embodiment, the axis of the pin 8 coincides with the axis of the sleeve 3, and the inner surface 1011 of the working section is far from its proximal end. The end extends obliquely, with a side inclination angle of 0.5°-2°. When the inner cutting surface 2011 and the inner surface 1011 of the working section are in an unclamped state, the proximal end of the inner surface 1011 of the working section and the axis of the sleeve 3 The vertical distance between them is greater than the vertical distance between its distal end and the axis of the cannula 3 . This further shortens the distance between the inner cutting surface 2011 and the distal end of the working section inner surface 1011, so that when clamping and shearing, the inner cutting surface 2011 and the working section inner surface 1011 extend from the distal end of the two to The proximal ends of the two are gradually fitted and clamped along the extension direction of the two, effectively ensuring that the distal ends of the inner cutting surface 2011 and the inner surface of the working section 1011 also have sufficient shearing force, and the two will not be far away from each other. end does not fit phenomenon.

As shown in Figure 7, it is the second embodiment of the present invention. The difference between the second embodiment and the first embodiment is that in the second embodiment, the axis of the pin 8 is different from the axis of the sleeve 3. overlap, and the axis of the pin 8 is set 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 extend obliquely to shorten the distance between its distal end and the distal end of the inner cutting surface 2011, and the axis of the pin 8 and the sleeve The distance between the axes of the tube 3 is within 0-1 mm, preferably 0.3 mm, and under the condition that the distance between the inner cutting surface 2011 and the inner surface 1011 of the working section is consistent, the second embodiment The required opening angle between the first shaft member and the second shaft member is smaller, which can save more effort.

As shown in Fig. 4, Fig. 5 and Fig. 9, an elastic pad 14 is arranged on the inner surface 1011 of the working section, a groove 104 is arranged on the axis of the inner surface 1011 of the working section, and the back side of the elastic pad 14 has A protrusion (not shown in the figure) matching the groove 103, the protrusion is clamped in the groove 103, and the surface of the elastic pad 14 is serrated. The elastic pad 14 is preferably made of silica gel material, and the sawtooth structure on its surface can play an anti-slip effect well, and protect the inner cutting surface 2011 and the inner surface 1011 of the working section. The convex portion is engaged with the groove 103 so that the elastic pad 14 is easy to replace.

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 connected to the waveguide through the positioning pin. The rod 2 is fixed, the front sleeve 301 is inserted from the distal end of the waveguide rod 2 and fixedly connected to the rear sleeve 302, and the junction of the front sleeve 301 and the rear sleeve 302 is combined with a limited hole 303, hinge holes 102 are provided on both sides of the bend of the elbow 1, the limit hole 303 and the hinge hole 102 are coaxial, and the two ends of the pin 8 are respectively set through the hinge hole 102 And in the limit hole 303, so that the pipe sleeve 3 and the elbow 1 are pivotally connected. The sleeve 3 is a divided pipe structure composed of the front sleeve 301 and the rear sleeve 302. On the one hand, it facilitates the installation of the waveguide 2. The bit hole 303 is pivotally connected with the elbow 1, which is convenient for assembly and meets the requirement of a larger opening angle.

Further as shown in Figure 8, the inner end of the pin 8 is set in the limiting hole 303, and its outer end is set in the hinge hole 102, and the inner end diameter of the pin 8 is larger than the outer end diameter , forming a T shape with a stepped surface 801 abutting against the inner wall of the elbow 1 . Such a structure makes the inner wall of the elbow 1 play a limiting role on the pin 8, prevents the pin 8 from falling from the hinge hole 102, and does not need other structures to position the pin, which facilitates assembly and simplifies the structure , saving costs. In other feasible embodiments, the pin 8 may also have other suitable shapes.

As shown in Fig. 10 and Fig. 11, gaps are respectively provided at the joints of the front sleeve 301 and the rear sleeve 302. When the front sleeve 301 and the rear sleeve 302 are connected into one body, the gaps The two are combined to form the limiting hole 303 . The notch can be in any suitable shape such as semicircle, arc, square, irregular, etc., which can make the limiting hole 303 match the inner end of the pin 8 .

Further as shown in Figure 12, the limiting hole 303 can also be set at the junction of the front sleeve 301 or the rear sleeve 302, and the limiting hole 303 can be in any shape such as circular, square, U-shaped, etc. the right shape.

As shown in Fig. 1 and Fig. 2, the interlocking button assembly includes a first button 10, a second button 11 and a connecting lever 12, and the connecting lever 12 includes 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 are connected, and the other end extends in the same direction, and the connecting lever 12 takes the center point of the first connecting rod 1201 as a fulcrum 1203 , and the first button 10 The second button 11 is symmetrically arranged on the outer two ends of the first connecting rod 1201 relative to the fulcrum 1202, and the extension end of the second connecting rod 1202 is a contact rod 1203, and the contact rod 1203 is located on the circuit board Between the two contact surfaces 701 of the switch 7 , the two contact surfaces 701 are respectively connected to the first button 10 or the second button 11 through the connecting lever 12 .

As shown in Figure 13 and Figure 14, in order to further improve the synchronization between the first connecting rod 1201 and the second connecting rod 1202, a support rod is arranged between the first connecting rod 1201 and the second connecting rod 1202 1204 , the two ends of the support rod 1204 are respectively connected to the central points of the first connecting rod 1201 and the second connecting rod 1202 .

As shown in Figure 15 and Figure 16 is another embodiment of the interlocking button assembly, the interlocking button assembly includes a first button 10 and a second button 11 and a rocker arm assembly 13, the rocker arm The structure is composed of two abutting first rocker arms and second rocker arms. The first rocker arm is V-shaped, and a first arm 1302 and a first connecting arm extend outward from its first rotation center 1301. 1303; the second rocker arm is Y-shaped, extending from its second rotation center 1304 with a second arm 1305, a second connecting arm 1306 and a contact arm 1307, and the first button 10 is set on the first On the support arm 1302, the second button 11 is arranged on the second support arm 1305, the inner surfaces of the extension ends of the first connecting arm 1303 and the second connecting arm 1306 abut against each other, and the contact arm 1307 is located on the Between the two contact surfaces 701 of the circuit board switch 7 , the two contact surfaces 701 are respectively connected to the first button 10 or the second button 11 through the rocker arm assembly 13 .

The setting of the interlocking button assembly satisfies the interlock between the first button 10 and the second button 11 on the one hand, so that the first button 10 and the second button 11 can switch between high and low working gears, and on the other hand increases the creepage distance , which meets the security setting requirements.

It should be understood that although this description is described according to implementation modes, not each implementation mode only contains an independent technical solution, and this description in the description is only for clarity, and those skilled in the art should take the description as a whole, and each The technical solutions in the embodiments can also be properly combined to form other embodiments that can be understood by those skilled in the art.

The series of detailed descriptions listed above are only specific descriptions for feasible implementations of the present invention, and they are not intended to limit the protection scope of the present invention. Any equivalent implementation or implementation that does not depart from the technical spirit of the present invention All changes should be included within the protection scope of the present invention.

Claims

The single long-distance ultrasonic scissors with side tilting shearing function are characterized in that they include a first shaft member and a second shaft member, and the first shaft member includes a first handle (4) and is arranged on the first An elbow (1) at the distal end of the handle (4), the second shaft member includes a second handle (5), a sleeve (3) disposed at the distal end of the second handle (5) . The waveguide rod (2) pierced in the sleeve (3), the inside of the second handle (5) is formed with a hollow accommodation cavity (100), the accommodation cavity (100) A transducer (6) connected to the waveguide rod (2) and a circuit board switch (7) for controlling the energy of the transducer (6) are built in, and the sleeve (3) passes through the bend At the bending part of the head (1), the overlapping parts of the two sides are pivotally connected by pins (8), so that the first shaft member and the second shaft member form a scissor structure; the waveguide rod (2) The cutter head (201) protrudes from the port of the sleeve (3) and extends forward in an arc shape, and the waveguide rod (2) passes through the through hole (9) at the tail of the sleeve (3) The pin is pierced inside to deflect and is limited in the sleeve (3), the through hole (9) is deflected by δ degrees to the first side (2012) of the cutter head (201), and the cutter head (201) The inner cutting surface (2011) is inclined from the second side (2013) to the first side (2012); the distal end of the elbow (1) has a working section (101) consistent with the radian of the cutter head (201) , the distal end of the inner cutting surface (2011) is closer to the working section inner surface (1011) of the working section (101) than its proximal end, and the first side (2012) of the inner cutting surface (2011) ) is closer to the inner surface of the working section (1011) than the second side (2013); when shearing, the inner cutting surface (2011) and the distal end of the inner surface of the working section (1011) contact first, and Under the deformation of the cutter head (201), the inner cutting surface (2011) and the inner surface (1011) of the working section move from the distal end to the proximal end, from the first side (2012) to the The second side (2013) is gradually fitted tightly.
The single-shot long-distance ultrasonic scissors with roll shearing function according to claim 1, characterized in that: the deflection angle δ is set according to the following formula [1]:

Wherein: Lb is the bending deflection of waveguide rod cutter bar; D1 is the distance between the rotation center of described waveguide rod (2) to the far-end of described cutter head (201),

The value of L b is determined by the following formula [2]:

Wherein, F is the shear pressure of the cutter head (201) of the waveguide rod (2), and the joint (202) connected with the cutter head (201) and supported on the waveguide rod (2) is regarded as Fixed end, L is the distance from the bending middle section of the cutter head (201) to the joint (202), E is the elastic modulus of the waveguide rod cutter rod, and I is the moment of inertia of the waveguide rod cutter rod;

The I is valued by the following formula [3]:

Wherein, D is the outer diameter of the cutter head (201) of the waveguide rod (2).
The single long-distance ultrasonic scissors with side tilting shearing function according to claim 2, characterized in that: the distance L is configured by the total length L' of the cutter head of the waveguide rod (2), and the cutter head (201 ) is curved, the first side (2012) of the cutter head (201) is a concave surface, and the second side (2013) of the cutter body (201) is a convex surface; the total length L' of the cutter head satisfies the following formula:

Wherein, a and y 2 are the coordinate coefficients of the reference point respectively, and the coordinates of the reference point are (-ay 2 , y 2 ), which are specifically determined by taking the knife tip (201) of the waveguide rod (2) as the origin The generated ray reaches the intersection point of the knife rod (201) of the waveguide rod (2), and the ray is parallel to the tangent line of the second side (2013).
The single long-distance ultrasonic scissors with side tilting shearing function according to claim 2, characterized in that: the axis of the pin (8) coincides with the axis of the sleeve (3), and the working section The inner surface (1011) extends obliquely from its proximal end to its distal end, with a side inclination angle of 0.5°-2°. When the inner cutting surface (2011) and the inner surface (1011) of the working section are not clamped, the working The vertical distance between the proximal end of the segment inner surface (1011) and the axis of said sleeve (3) is greater than the vertical distance between its distal end and the axis of said sleeve (3).
The single long-distance ultrasonic scissors with side tilting shearing function according to claim 2, characterized in that: the axis of the pin (8) does not coincide with the axis of the sleeve (3), and the The axis of the pin (8) is set close to the elbow (1); in a clamped state, the inner surface (1011) of the working section is parallel to the axis of the sleeve (3).
The single long-distance ultrasonic scissors with side tilting shearing function according to claim 1, characterized in that: the inner surface (1011) of the working section is provided with an elastic pad (14), and the inner surface of the working section ( 1011) is provided with a groove (104), the back of the elastic pad (14) has a protrusion matching the groove (103), and the protrusion is clamped in the groove (103 ), the surface of the elastic pad (14) is serrated.
The single long-distance ultrasonic scissors with side tilting shearing function according to claim 4 or 5, characterized in that: the sleeve (3) is formed by splicing the front sleeve (301) and the rear sleeve (302) In this way, 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 far end of the waveguide rod (2) and affixed to the rear sleeve (302), and the connection between the front sleeve (301) and the rear sleeve (302) is provided with a limit hole ( 303), hinge holes (102) are provided on both sides of the bend of the elbow (1), the limiting hole (303) and the hinge hole (102) are coaxial, and the pin (8) The two ends are respectively passed through the hinge hole (102) and the limit hole (303), so that the pipe sleeve (3) and the elbow (1) are pivotally connected.
The single long-distance ultrasonic scissors with side tilting shearing function according to claim 7, characterized in that: the connection of the front sleeve (301) and/or the rear sleeve (302) is provided with a gap, when When the front sleeve (301) and the rear sleeve (302) are connected into one body, the gaps are combined in pairs to form the limiting hole (303).
The single long-distance ultrasonic scissors with side tilting shear function according to claim 1, characterized in that: it also includes an interlock button assembly electrically connected with the circuit board switch (7), the interlock button assembly The button assembly includes a first button (10) and a second button (11) and a connecting lever (12), and the connecting lever (12) includes 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) are connected, and the other end extends in the same direction, and the connecting lever (12) takes the central point of the first connecting rod (1201) as the fulcrum (1203 ), the first button (10) and the second button (11) are symmetrically arranged on the outer two ends of the first connecting rod (1201) relative to the fulcrum (1202), and the second connecting rod (1202) The extended end of the contact rod (1203) is located between the two contact surfaces (701) of the circuit board switch (7), and the two contact surfaces (701) respectively pass through the The connecting lever (12) is connected to the first button (10) or the second button (11).
The single-shot long-distance ultrasonic scissors with side tilting shearing function according to claim 9, characterized in that: a support rod (1204) is arranged between the first connecting rod (1201) and the second connecting rod (1202) ), the two ends of the support rod (1204) are respectively connected to the central points of the first connecting rod (1201) and the second connecting rod (1202).
The single long-distance ultrasonic scissors with side tilting shearing function according to claim 1, characterized in that: it also includes an interlock button assembly electrically connected with the circuit board switch (7), the interlock button assembly The button assembly includes a first button (10), a second button (11) and a rocker arm assembly (13), and the rocker arm structure is composed of two abutting first rocker arms and a second rocker arm, the first rocker arm The rocker arm is V-shaped, with a first arm (1302) and a first connecting arm (1303) extending outward from its first rotation center (1301); the second rocker arm is Y-shaped, extending from its first The second rotation center (1304) is extended with a second arm (1305), a second connecting arm (1306) and a contact arm (1307), and the first button (10) is arranged on the first arm (1302) , the second button (11) is arranged on the second arm (1305), the inner surfaces of the extension ends of the first connecting arm (1303) and the second connecting arm (1306) abut against 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 Second button (11).