CN113662628B

CN113662628B - Tool bit device with energy gathering characteristic and ultrasonic surgical instrument

Info

Publication number: CN113662628B
Application number: CN202110770888.7A
Authority: CN
Inventors: 钟学平; 孙秋香
Original assignee: Tianjin Yuean Medical Technology Co ltd
Current assignee: Tianjin Yuean Medical Technology Co ltd
Priority date: 2021-07-08
Filing date: 2021-07-08
Publication date: 2023-06-13
Anticipated expiration: 2041-07-08
Also published as: CN113662628A

Abstract

The invention discloses a tool bit device with energy gathering characteristics and an ultrasonic surgical instrument, wherein the tool bit device comprises: an ultrasonic energy treatment end, a shaft assembly, a proximal interface; the tool bit unit comprises a treatment elbow characteristic part arranged at the far end of the tool bit unit and deviating from the standard axis at a preset angle, and an elbow dynamic balance characteristic part arranged at the near end of the tool bit unit and distributed on different sides of the standard axis from the treatment elbow characteristic part. The invention has the beneficial effects that: the control of the influence factors of the treatment elbow characteristic part on the clutter amplitude in the cutter head unit improves the stress concentration of the treatment elbow characteristic part, and reduces the energy loss rate of the cutter head unit; the elbow dynamic balance characteristic part arranged in the cutter head unit improves the dynamic balance state of the cutter head unit relative to the treatment elbow characteristic part, reduces clutter amplitude of the cutter head unit, and avoids acoustic damage of the cutter head unit; the pressure matching characteristic surface and the negative angle feedback characteristic part optimize the tissue pressure distribution of the cutter head unit, and improve the cutting and coagulation effects.

Description

Tool bit device with energy gathering characteristic and ultrasonic surgical instrument

Technical Field

The invention relates to the technical field of ultrasonic surgical instruments, in particular to a tool bit device with energy-gathering characteristics and an ultrasonic surgical instrument.

Background

At present, surgical instruments comprising an ultrasonic treatment energy end tool bit unit are widely applied to clinical surgical treatment, the surgical instruments generally comprise an ultrasonic knife generator, a surgical tool bit comprising one or more piezoelectric ceramic unit transducers, a cable and a manual switch, the manual switch on the surgical tool bit is activated to enable the ultrasonic surgical instruments to work, a host machine outputs high-frequency resonance electric signals to the transducers, the transducers convert the high-frequency vibration signals into high-frequency mechanical vibrations which are amplified through an acoustic waveguide rod and transmitted to the tool bit unit on the surgical tool bit, the high-frequency mechanical vibrations of the tool bit unit act on human tissues, so that water in tissue cells is gasified, protein hydrogen bonds are broken, cells are disintegrated, and tissues are cut or coagulated, and the purposes of cutting and suturing the tissues are achieved. The cutting and coagulation effects are ensured by the physician's skill level and coordination between power, blade angle, tissue traction, blade pressure, etc.

The current cutter head units are in some shapes of elbow structures for increasing the operation field of view, and in some shapes of high-efficiency specific shapes for increasing the balance structure, or are compatible with the composite shapes of the two structures, the existing ultrasonic surgical operation instrument is provided with the high-frequency vibration cutter head units, the acoustic damage of the cutter head units is caused by unreasonable structural stress concentration layout or instability of the processing technology caused by small elbow sizes, and moreover, the poor cutting and coagulation effects of the cutter head units on tissues are caused by the non-ideal pressure states of tissues on the cutter head.

Disclosure of Invention

The invention aims to overcome the defects in the prior art and provides a tool bit device with energy gathering characteristics and an ultrasonic surgical instrument.

The technical scheme of the invention is as follows:

in a first aspect, the present invention provides a tool bit assembly with energy concentrating features, comprising:

the ultrasonic energy treatment end comprises a tool bit unit and a power amplifier unit;

a shaft assembly including a waveguide matingly connected to the ultrasonic energy treatment end; the ultrasonic high-frequency vibration is transmitted to the cutter head unit through the waveguide tube on the standard axis determined by the axis of the shaft component;

a proximal interface comprising an external interface, an internal interface; the external interfaces are distributed in parallel along the standard axis on the proximal interface; the internal interface is angularly distributed on the proximal interface with the standard axis;

the tool bit unit comprises a treatment elbow characteristic part arranged at the far end of the tool bit unit and deviating from the standard axis by a preset angle, an elbow dynamic balance characteristic part arranged at the near end of the tool bit unit and distributed on different sides of the standard axis with the treatment elbow characteristic part, a pressure matching characteristic surface arranged on the upper side of the tool bit unit and distributed along a bending central axis determined by the treatment elbow characteristic part, and a negative angle feedback characteristic part formed by offsetting the pressure matching characteristic surface at the lateral end of the tool bit unit relative to the standard axis.

The elbow dynamic balance feature is deviated from the treatment elbow feature and is used for adjusting the dynamic balance of the tool bit unit, the tool bit unit comprises a plurality of continuous faces extending from the power amplifier unit to the distal end of the tool bit unit, the continuous faces comprise the pressure matching feature faces which are positioned on the upper side of the tool bit unit and provide pressure support for tissue clamping, and the width of the pressure matching feature faces is gradually changed from the proximal end of the tool bit unit to the distal end of the tool bit unit along the bending central axis; the distal end of the pressure matching feature provides a non-parallel offset of the tissue clamping pressure support direction to the pressure matching feature relative to the standard axis forming a negative angle feedback feature.

Preferably, the elbow dynamic balance feature part is used for adjusting dynamic balance of the tool bit unit in the horizontal direction and the vertical direction perpendicular to the standard axis, so that the tool bit unit meets the dynamic balance condition that the product of the mass center mass of the elbow dynamic balance feature part and the distance of the mass center mass of the tool bit unit without the elbow dynamic balance feature part deviating from the standard axis is equal;

preferably, the therapeutic elbow feature is at an angle of no more than 21.5 degrees from the standard axis;

preferably, the elbow dynamic balancing feature is offset from a regular outer surface at the proximal end of the cutter head unit; the dynamic balance characteristic part of the elbow is divided into a plurality of dynamic balance adjusting units, and the dynamic balance adjusting units of the elbow are distributed on the same side of the axial standard axis.

Preferably, the pressure matching feature face is tapered approximately isosceles trapezoid with respect to the central axis of curvature, the pressure matching feature face being smaller in size near the distal end of the cutter head unit than the pressure matching feature face is in size near the proximal end of the cutter head unit.

Preferably, the negative angle feedback feature is provided with a compensating pressure face, the projection on a plane passing through the axial normal axis and perpendicular to the direction of the pressure matching feature face being a single 3-order smooth non-straight line, the single 3-order smooth non-straight line being offset non-parallel to the axial normal axis.

Preferably, the therapeutic elbow feature has a cross-section perpendicular to the curved central axis that is more than 5 sided polygonal.

Preferably, the therapeutic elbow feature comprises, in a cross-section perpendicular to the curved central axis:

a pressure matching feature projection line, the length of the matching feature projection line at different locations in a cross-section perpendicular to the central axis of curvature decreasing from the proximal end of the therapeutic elbow feature to the distal end of the therapeutic elbow feature, the distance of the pressure matching feature projection line from the center point of intersection of the central axis of curvature in a cross-section perpendicular to the central axis of curvature increasing from the proximal end of the therapeutic elbow feature to the distal end of the therapeutic elbow feature.

In a second aspect, the present invention provides an ultrasonic surgical instrument comprising:

an ultrasonic blade generator, one or more piezoceramic unit transducers, a clamping mechanism, a support body, and a blade assembly according to the first aspect.

The clamping mechanism is matched with the cutter head device in the first aspect to provide a tissue clamping force; the supporting body supports and mounts the cutter head device according to the first aspect.

As described above, the cutter bar device comprising the energy-gathering characteristic of the invention has the following beneficial effects: the control of the influence factors of the treatment elbow characteristic part on the clutter amplitude in the cutter head unit improves the stress concentration of the treatment elbow characteristic part, and reduces the energy loss rate of the cutter head unit; the elbow dynamic balance characteristic part arranged in the cutter head unit improves the dynamic balance state of the cutter head unit relative to the treatment elbow characteristic part, reduces clutter amplitude of the cutter head unit, and avoids acoustic damage of the cutter head unit; the pressure matching characteristic surface and the negative angle feedback characteristic part arranged in the cutter head unit optimize the tissue pressure distribution of the cutter head unit, and improve the cutting and coagulation effects.

Drawings

FIG. 1A depicts a schematic structural view of a cutter head device with energy concentrating features;

FIG. 1B depicts a schematic structural view of an ultrasonic energy treatment tip of the cutter head device of FIG. 1;

FIG. 2 depicts a schematic view of an ultrasound energy therapy tip cut along a standard axis;

FIG. 3A depicts a schematic top view of a standard axis of a blade unit in an ultrasound energy therapy tip and a curved central axis, with an elbow therapy feature in the blade unit offset from the standard axis;

FIG. 3B depicts a schematic top view similar to FIG. 3A of a prior art cutter head device;

FIG. 4A depicts a schematic diagram of the distribution of axial displacements (Z-axis) of the dither of the tool bit unit in the ultrasound energy therapy tip and the node of maximum axial displacement (Z-axis) of the dither of the tool bit unit in the ultrasound energy therapy;

FIG. 4B depicts a schematic axial displacement (Z-axis) view similar to FIG. 4A of a prior art cutter head device;

FIG. 4C depicts a schematic diagram of the dither and displacement distribution of a cutter head unit in an ultrasound energy therapy tip;

FIG. 4D depicts a combined displacement schematic of a prior art cutter head device similar to FIG. 4C;

FIG. 5A depicts a partial schematic view of a pressure matching feature in a cutter head unit;

FIG. 5B depicts a schematic overall construction of the cutter head assembly;

FIG. 5C depicts a tissue pressure load concentration curve q with a configuration of the cutter head unit and clamping mechanism, without negative angle feedback features on the pressure matching feature in the cutter head unit ₂ (x) Schematic of (2);

FIG. 5D depicts a schematic side view of the bit unit in use with the clamping mechanism;

FIG. 5E depicts another schematic side view of the bit unit of FIG. 5D in use with a clamping mechanism;

FIG. 6 depicts a tissue pressure load concentration curve q without negative angle feedback features on the pressure matching feature in the cutter head unit ₂ (x) Tissue pressure load concentration curve q on pressure matching feature surface including negative angle feedback feature in cutter head unit ₃ (x) And q-like of existing cutter head arrangements ₂ (x) Is a tissue pressure load concentration curve q ₁ (x) A schematic diagram;

FIG. 7A depicts a schematic view of a negative angle feedback feature formed in a front view of a cutter head unit by a pressure matching feature face in the cutter head unit;

FIG. 7B depicts the bit unit adding clamping reaction curvature to human tissue through deformation of the negative angle feedback featureLine q _11D (x) A schematic diagram;

FIG. 8 depicts a schematic view of the distal end of the cutter head unit;

FIG. 9 depicts a top view of another embodiment of an elbow dynamic balancing feature in a cutter head unit;

FIG. 10 depicts a top view of yet another embodiment of an elbow dynamic balancing feature in a cutter head unit;

FIG. 11A depicts a schematic view of a pressure matching feature in a cutter head unit tapered in a high order hyperbola;

FIG. 11B depicts a tissue pressure load concentration curve q on the pressure matching feature plane of the higher order hyperbola of FIG. 11A ₄ (x) And the existing cutter head device is similar to q ₄ (x) Is a tissue pressure load concentration curve q ₁ (x) A schematic diagram;

FIG. 12 depicts a top view of yet another embodiment of a cutter head device;

FIG. 13 depicts a top view of yet another embodiment of a cutter head device;

FIG. 14 depicts a side view of yet another embodiment of a cutter head device;

fig. 15 depicts a side view of yet another embodiment of a cutter head device.

Detailed Description

The present invention will be described in further detail with reference to specific examples. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.

In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention.

In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be the communication between the two parts. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art in a specific case.

As shown in fig. 1A, the present invention provides a tool bit device including energy accumulating features, the tool bit device including: an ultrasonic energy treatment end 1, a shaft component 2 and a proximal end interface 3;

the ultrasonic energy treatment end 1 comprises a high-frequency vibration tool bit unit 11 and a power amplifier unit 12;

the shaft assembly 2 defines a standard axis 21, the shaft assembly 2 including a waveguide 22; the ultrasonic high-frequency vibrations are transmitted to the cutter head unit 11 along the waveguide 22 on the standard axis 21. The wave guide tube 22 in the shaft rod assembly 2 is connected with the tool bit unit 11 in a matching way;

the proximal interface 3 comprises an external interface 31 distributed along the standard axis 21; the proximal interface 3 connects with the support body 4 with the internal interface 32 in an angular direction to the standard axis 21, as shown in fig. 5B;

the head unit 11 includes: treatment elbow feature 11A, elbow dynamic balance feature 11B, pressure matching feature 11C, negative angle feedback feature 11D, as in fig. 1B;

the treatment elbow feature 11A defines a central axis of curvature 11A1, the treatment elbow feature 11A being disposed at the distal end of the cutter head unit 11;

the elbow dynamic balance feature 11B is offset from the treatment elbow feature 11A, the elbow dynamic balance feature 11B and the treatment elbow feature 11A being distributed on different sides of the standard axis 21;

the pressure matching feature surfaces 11C are distributed on the cutter head unit 11 along the bending central axis 11A1, and the shape of the pressure matching feature surfaces 11C is tapered along the bending central axis 11 A1;

a negative angle feedback feature 11D is disposed at the distal end of the cutter head unit 11, the negative angle feedback feature 11D being offset relative to the axis 21.

The treatment bend feature 11A in the cutter head unit 11, which deviates from the standard axis 21, will disrupt the dynamic balance of the cutter head unit 11, causing an increase in energy loss and a reduction in the service life in the dither cutter head unit 11, in order to avoid this defect, a bend dynamic balance feature 11B is provided in the cutter head unit 11; the elbow dynamic balance feature 11B adjusts the dynamic balance of the head unit 11 in the X-axis, Y-axis directions with respect to the Z-axis. The condition for satisfying the dynamic balance is that the product of the mass of the center of mass of the elbow dynamic balance feature 11B and the distance of the mass of the center of mass of the head unit 11 free of 11B from the standard axis 21 is equal, as shown in fig. 2.

The dynamic balance state in the Y-axis direction of the prior art bit unit 11' shown in fig. 3A is shown in table 1; the elbow dynamic balance feature 11B shown in fig. 3B is set as the mass on the outer circumferential surface of the cutter head unit 11, and the dynamic balance states on the Y axis and the X axis of the cutter head unit 11 are shown in table 1:

as can be seen from table 1, the deviations of the X-axis dynamic balance of the tool bit unit 11 and the tool bit unit 11' are 8.6544 and 11.8559, respectively, and the deviations of the Z-axis dynamic balance of the tool bit unit 11 and the tool bit unit 11' are 16.1936 and 60.1671, respectively, and the deviations of the overall tool bit unit 11 and the tool bit unit 11' are 3.7026 and 13.7954, respectively, and the deviations are large.

The shape of the treatment elbow feature 11A in fig. 3A that increases the surgical field extends away from the standard axis 21 toward the standard axis 21, the treatment elbow feature 11A forming an angle R (11A) with the standard axis 21, and fig. 4 shows that the greater the angle R (11A) of the treatment elbow feature 11A with the standard axis 21, the greater the ratio of lateral displacement (Y-direction) to axial displacement (Z-direction) of the treatment elbow feature 11A. The lateral displacement (Y-direction) of the treatment elbow feature 11A is limited to a range of values within a certain interval taking into account the acoustic material, energy heating loss rate, and the life of the cutter head unit 11.

Table 2 and fig. 3B, fig. 4A, fig. 4B, fig. 4C, fig. 4D illustrate that it is reasonable to control the R (11A) angle of the treatment elbow feature 11A to the standard axis 21 to be within 21.5, and the ratio of the lateral displacement (Y-direction) to the axial displacement (Z-direction) of the treatment elbow feature 11A to be within 6%.

The simulation results of the cutter head unit 11' and the cutter head unit 11 are shown in table 2:

MODEL	NODE	UX	UY	UZ	USUM	∣UY/UZ∣
							11'	12613	-0.42595	3.3603	36.543	36.700	9.03％
11	44335	-2.6098	-1.4723	26.729	26.897	5.60％

the profile of the pressure matching feature surface 11C on the cutter head unit 11 is tapered approximately isosceles trapezoid along the curved central axis 11A, as shown in fig. 5A. The pressure matching feature 11C 'changes to the pressure matching feature 11C under the condition that the bending central axis 11A1' changes to the bending central axis 11A. The clamping force applied by the clamping mechanism 5 to the treatment elbow feature 11A supporting body tissue, as shown in fig. 5B, 5C, the concentration of pressure load on the pressure matching feature 11C is:

the isosceles trapezoid shape of the pressure matching feature surface 11C on the cutter head unit 11 can be described as:

f _s2 (x)＝a ₂ -b ₂ x

the load on the approximate cantilever beam is:

the shear force of the tissue cut on the cutter head unit 11 is the pressure load concentration curve and the length X of the X-axis at the treatment elbow feature 11A ₀ Interval integration area.

As shown in fig. 5D, the concentration of the pressure load on the cutter head unit 11' of fig. 5E is:

as shown in FIG. 6, the cutter head unit 11 is in the interval [0, X ₀ ]The upper cantilever beam load is larger than the cantilever beam load on the cutter head unit 11', the energy required for cutting the human tissue is less, and the human tissue cutting speed is high.

The negative angle feedback feature 11D on the cutter head unit 11 is provided as a smooth curved surface, as shown in fig. 7The projection of negative angle feedback feature 11D onto a plane passing through standard axis 21 perpendicular to pressure matching feature 11C is a single smooth line 11D2, a horizontal line 11D1 extending from the regular peripheral edge of power amplifier unit 12 parallel to standard axis 21, single smooth line 11D2 deviating from non-parallel standard axis 21, single smooth line 11D2 extending in a direction opposite to the direction in which clamping mechanism 5 applies tissue clamping force to treatment elbow feature 11A supporting human tissue, clamping mechanism 5 applies human tissue clamping force to treatment elbow feature 11A forcing single smooth line 11D2 to bend proximally to standard axis 21, in which case bit unit 11 increases clamping reaction force q to human tissue _11D (x) The cantilever load on the cutter head unit 11 is increased. As shown in fig. 7B.

The relation between the upper disturbance degree and the load concentration degree of the cantilever beam is as follows:

the single smooth line 11D2 is set to a 3-order higher order curve, and the concentration of pressure load on the bit unit 11 provided with the negative angle feedback feature 11D:

as shown in fig. 6, the concentration q of the pressure load on the head unit 11 provided with the negative angle feedback feature 11D ₃ (x) Length X of treatment elbow feature 11A with X-axis ₀ Interval integral area ratio q ₂ (x)、q ₁ (x) The integrated area of (a) is larger and the head unit 11 provided with the negative angle feedback feature 11D has a higher speed of cutting human tissue than the head unit 11'.

In fig. 8, the therapeutic elbow feature 11A is a polygon with more than 5 sides in a cross section 11A2 perpendicular to the curved central axis 11A 1;

the therapeutic elbow feature 11A comprises, in a cross section 11A2 perpendicular to the curved central axis 11A 1:

a length a of the pressure matching feature projection line 11C1 on a cross section 11A2 perpendicular to the bending central axis 11A1 at different positions decreases from the proximal end of the treatment elbow feature 11A to the distal end of the treatment elbow feature 11A, and a distance b of the pressure matching feature projection line 11C1 from a center point of intersection of the bending central axis 11A1 on the cross section 11A2 perpendicular to the bending central axis 11A1 increases from the proximal end of the treatment elbow feature 11A to the distal end of the treatment elbow feature 11A.

In summary, the invention improves the 3-dimensional dynamic balance state of the cutter head unit 11 relative to the treatment elbow feature 11A and the control of the effect factor of the treatment elbow feature 11A in the cutter head unit 11 through the elbow dynamic balance feature 11B provided in the cutter head unit 11 to improve the stress concentration of the treatment elbow feature 11A, reduce the clutter amplitude of the cutter head unit 11 in each direction, increase the ultrasonic energy focusing, and avoid the acoustic damage of the cutter head unit 11; the pressure matching feature surface 11C and the negative angle feedback feature part 11D arranged in the cutter head unit 11 optimize the tissue pressure distribution of the cutter head unit 11, and improve the cutting and coagulation effects.

Example 2:

as shown in fig. 9, the elbow dynamic balance feature a11B in the cutter head unit a11 is set as a cross combination of two discontinuous connection structures of the dynamic balance adjustment units a11B1 and a11B 2. The dynamic balance adjusting units a11B1 and a11B2 are arranged to adjust the respective quality and shape in a mutually matched manner under the conditions of considering the size matching and smooth transition of the tool bit unit a11 and the power amplifier unit a12, the outline definition of the pressure matching characteristic surface and the dynamic balance quality adjustment, and the transitional connection between the dynamic balance adjusting units a11B1 and a11B2 is not considered.

Example 3:

as shown in fig. 10, the elbow dynamic balance feature B11B in the cutter head unit B11 is set as a connection combination segment of the dynamic balance adjustment units B11B1, B11B2, in which the multi-segment smooth curve segments are connected. In comparison with the dynamic balance adjustment units a11B1, a11B2 provided in embodiment 2, the provision of the dynamic balance adjustment units B11B1, B11B2 in the bit unit B11 allows for the smooth transition before the dynamic balance adjustment units B11B1, B11B2 to completely reduce the stress concentration caused by the elbow dynamic balance feature a11B in the bit unit a11 in embodiment 2 in addition to the function of the dynamic balance adjustment units a11B1, a11B2 provided in embodiment 2.

Example 4:

as shown in fig. 11A, the pressure matching feature surface C11C has a tapered shape with respect to the bending center axis C11A1 by a high-order hyperbola C11C1, the high-order double expression being:

load concentration curve q on pressure matching characteristic surface C11C ₄ (x) As shown in fig. 11B, the pressure matching feature C11C of the cutter head unit C11 may be a segment [0, x ] ₀ ]The upper cantilever beam load is increased, and the cantilever beam load on the pressure matching characteristic surface C11C of the cutter head unit C11 is in the interval [0, X ₀ ]The upper integral area is greatly increased compared with the integral area on the cutter head unit 11', the energy required for cutting the human tissue is greatly reduced, and the speed for cutting the human tissue is greatly improved.

Example 5:

as shown in fig. 12, the pressure matching feature surface d11C in the cutter head unit d11 is tapered in a triangle shape d11C1 with respect to the bending center axis d11 A1. The width of the pressure matching feature d11 tapered in the triangle d11C1 decreases more rapidly from the proximal end of the head unit d11 to the distal end of the head unit d11 than the width of the pressure matching feature 11C tapered in an isosceles trapezoid from the proximal end of the head unit 11 to the distal end of the head unit 11, and the load concentration aq on the pressure matching feature d11C ₃ (x) Load concentration q on specific pressure matching feature 11C from near head unit d11 to head unit d11 ₃ (x) More increases from the proximal end of the cutter head unit d11 to the cutter head unit d11, the cutter head unit d11 has a higher speed of cutting human tissue than the cutter head unit 11.

Example 6:

as shown in fig. 13, the pressure matching feature surface e11C in the bit unit e11 may be shaped as a triangle e11C1 with respect to the bending center axis e11A1 and a connection shape of a coaxial straight line segment e11C2 with the bending center axis e11 A1. The width of the pressure matching feature surface e11C tapered in the triangle e11C1 and the straight line segment e11C2 coaxial with the bending center axis e11A1 is reduced more rapidly from the proximal end of the cutter head unit e11 to the distal end of the cutter head unit e11 than the similar width of the pressure matching feature surface d11 tapered in the triangle d11C1 in the embodiment 5, the load concentration on the straight line segment e11C2 in the pressure matching feature surface e11C reaches infinity with respect to the ideal width-free straight line, and the cutter head unit e11 has a higher cutting speed of human tissue than the cutter head unit d11 in the embodiment 5.

Example 7:

as shown in fig. 14, the surface of the pressure matching feature surface h11C in the head unit h11 may be provided with a chute h11E angled to the curved central axis h11 A1. The inclined groove h11E on the pressure matching characteristic surface h11C can increase the reliability of clamping human tissues, prevent the human tissues from separating from the far end of the cutter head unit h11, and increase the cutting effectiveness of the human tissues; the inclined groove h11E on the pressure matching characteristic surface h11C can increase transverse bending strength (Y axis) of the cutter head unit h11, reduce transverse energy loss (Y axis) of the cutter head unit h11 and prolong the service life of the cutter head unit h 11.

Example 8:

as shown in fig. 15, the power amplifier unit k12 in the ultrasonic energy treatment end k1 may be provided with a 3-dimensional energy-collecting rotary coupling k12A. The 3-dimensional energy-gathering rotary coupling part K12A in the ultrasonic energy treatment end K1 can convert high-frequency longitudinal vibration along the standard axis K21 transmitted from the attack and defense unit K12 into torsional vibration along the standard axis, and the torsional vibration is overlapped with the high-frequency longitudinal vibration along the standard axis K21 of the tool bit unit K11 in the ultrasonic energy treatment end K1 to increase the energy action of the ultrasonic energy treatment end K1 on human tissues, so that the cutting and coagulation effects are improved.

The foregoing detailed description of the embodiments of the invention has been presented only to illustrate the preferred embodiments of the invention and should not be taken as limiting the scope of the invention. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. While still being apparent from variations or modifications that may be made by those skilled in the art are within the scope of the invention.

Claims

1. A tool bit device with energy concentrating features, comprising:

the tool bit unit comprises a treatment elbow characteristic part arranged at the far end of the tool bit unit and deviating from the standard axis by a preset angle, an elbow dynamic balance characteristic part arranged at the near end of the tool bit unit and distributed on a different side of the standard axis from the treatment elbow characteristic part, a pressure matching characteristic surface arranged on the upper side of the tool bit unit and distributed along a bending central axis determined by the treatment elbow characteristic part, and a negative angle feedback characteristic part formed by offsetting the pressure matching characteristic surface at the lateral end of the tool bit unit relative to the standard axis;

the elbow dynamic balance feature is deviated from the treatment elbow feature and is used for adjusting the dynamic balance of the tool bit unit, the tool bit unit comprises a plurality of continuous faces extending from the power amplifier unit to the distal end of the tool bit unit, the continuous faces comprise the pressure matching feature faces which are positioned on the upper side of the tool bit unit and provide pressure support for tissue clamping, and the width of the pressure matching feature faces is gradually changed from the proximal end of the tool bit unit to the distal end of the tool bit unit along the bending central axis; providing a non-parallel offset of a tissue clamping pressure support direction to the pressure matching feature face relative to the standard axis at a distal end of the pressure matching feature face to form a negative angle feedback feature;

the negative angle feedback feature part is set to be a smooth curved surface, the projection of the negative angle feedback feature part on a plane passing through the standard axis and perpendicular to the direction of the pressure matching feature surface is a single smooth line, the single smooth line deviates from a non-parallel standard axis, and the horizontal line is parallel to the standard axis and extends from the edge line of the regular outer periphery of the power amplifier unit.

2. The energy concentrating feature of claim 1 wherein: the elbow dynamic balance feature is used for adjusting dynamic balance of the tool bit unit in the horizontal direction and the vertical direction perpendicular to the standard axis, so that the tool bit unit meets the dynamic balance condition that the product of the mass center mass of the elbow dynamic balance feature and the distance of the mass center mass of the tool bit unit without the elbow dynamic balance feature deviating from the standard axis is equal.

3. The energy concentrating feature of claim 1 wherein: the treatment elbow feature is angled no more than 21.5 degrees from the standard axis.

4. The energy concentrating feature of claim 1 wherein: the elbow dynamic balancing feature is offset from a regular outer surface at the proximal end of the cutter head unit;

the elbow dynamic balance characteristic part is divided into a plurality of dynamic balance adjusting units, and the dynamic balance adjusting units are distributed on the same side of the standard axis.

5. The energy concentrating feature of claim 1 wherein: the pressure matching feature surface is configured to taper approximately isosceles trapezoid with respect to the curved central axis, and the pressure matching feature surface is smaller near the distal end of the cutter head unit than near the proximal end of the cutter head unit.

6. The energy concentrating feature of claim 1 wherein: the negative angle feedback feature is projected onto a plane passing through the normal axis perpendicular to the pressure matching feature face direction as a single 3-step smooth non-straight line that is offset non-parallel to the normal axis.

7. The energy concentrating feature of claim 1 wherein: the therapeutic elbow feature has a cross-section perpendicular to the curved central axis that is more than 5 sided polygonal.

8. The energy concentrating feature of claim 1 wherein: the therapeutic elbow feature comprises, in a cross-section perpendicular to the curved central axis:

a pressure matching feature projection line that decreases in length at different locations in a cross-section perpendicular to the central axis of curvature from a proximal treatment elbow feature end to a distal treatment elbow feature end, the pressure matching feature projection line increasing in distance from a center point of intersection of the central axis of curvature with the cross-section perpendicular to the central axis of curvature from the proximal treatment elbow feature end to the distal treatment elbow feature end.

9. The energy concentrating feature of claim 4 wherein: the dynamic balance adjusting unit is a cross combination of two sections of structures.

10. The energy concentrating feature of claim 4 wherein: the dynamic balance adjusting unit is a connecting combination section comprising a plurality of smooth curve sections.

11. The energy concentrating feature of claim 1 wherein: the width of the pressure matching feature is tapered in a higher order hyperbola relative to the central axis of curvature.

12. The energy concentrating feature of claim 1 wherein: the width of the pressure matching feature face tapers in a triangle with respect to the central axis of curvature.

13. The energy concentrating feature of claim 1 wherein: the pressure matching feature face is provided with a chute angled from the curved central axis.

14. The energy concentrating feature of claim 1 wherein: and a 3-dimensional energy-gathering rotary coupling part is arranged on the circumferential surface of the power amplification unit.

15. An ultrasonic surgical instrument comprising: an ultrasonic blade generator, one or more piezoceramic unit transducers, a clamping mechanism, a support body, and the blade assembly of any one of claims 1-14;

the clamping mechanism providing a tissue clamping force in cooperation with the blade arrangement of any one of claims 1-14; the support body supports mounting the bit assembly of any one of claims 1-14.