CN209379354U - Ultrasonic transducer and ultrasonic surgical instrument including it - Google Patents
Ultrasonic transducer and ultrasonic surgical instrument including it Download PDFInfo
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- CN209379354U CN209379354U CN201821481442.2U CN201821481442U CN209379354U CN 209379354 U CN209379354 U CN 209379354U CN 201821481442 U CN201821481442 U CN 201821481442U CN 209379354 U CN209379354 U CN 209379354U
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Abstract
The utility model provides a kind of ultrasonic transducer and the ultrasonic surgical instrument including it.The ultrasonic transducer includes pre-tightening bar, rear metal block, piezoelectric ceramic piece, electrode slice and preceding metal block, pre-tightens bar, rear metal block, piezoelectric ceramic piece, electrode slice and preceding metal block and sequentially coaxially connects；Wherein: rear metal block is provided with concave part, pre-tightens bar and is embedded in the concave part of rear metal block, so as to improve the topology layout of ultrasonic transducer, has been effectively conducted pressure, has improved the resonance characteristic of ultrasound resonance system.Ultrasonic transducer provided by the utility model can not only improve the resonance impedance of energy converter; the operating temperature field of energy converter can also be improved, so that it is guaranteed that energy converter has better electromechanical Coupling and good resonant operational state and improves the surgical effect of ultrasonic surgical instrument.
Description
Technical field
The utility model relates to ultrasonic surgical instrument field more particularly to a kind of ultrasonic transductions for ultrasonic surgical instrument
Device and its ultrasonic surgical instrument.
Background technique
Ultrasonic surgical instrument including ultrasonic surgical blade is due to unique performances such as its accurate cutting, quick-acting haemostatic powders
It is increasingly being applied to clinic.There is provided in ultrasonic surgical instrument and converting electrical energy into the core component of ultrasonic vibration is ultrasound
Energy converter, it can generate mechanical oscillation at ultrasonic frequencies, and mechanical oscillation are transferred to end by transmission apparatus or waveguide
Actuator (for example, cutter head), the vibration so as to cause end effector relative to transmission apparatus, and the vibration of end effector can
To generate amount of localized heat in tissue, to help to cut tissue and coagulation.As it can be seen that ultrasonic transducer is for ultrasound
The overall performance of surgical instruments plays a crucial role, and directly affects the energy conversion efficiency and cutter head of ultrasonic surgical blade system
Cutting bleeding effect.
Fig. 1 is the structural schematic diagram of ultrasonic transducer in the prior art.As shown in Figure 1, in the prior art, medical neck
The ultrasonic transducer 10 in domain includes pre-tightening screw rod 11, rear metal block 13, brilliant heap 15 and preceding metal block including piezoelectric ceramic piece
17, the connection of these element coaxials.Fig. 2 is the lateral plan of ultrasonic transducer in the prior art.As shown in Fig. 2, in the structure
In, the first surface for the separate preceding metal block 17 that the head for pre-tightening screw rod 11 fits in rear metal block 13 (pre-tightens screw rod 11
Head is external or is attached at rear metal block 13), namely pre-tighten screw rod 11 and pass through the first surface of the rear metal block 13 of energy converter 10
Apply pretightning force.
And a critically important index for measuring the characteristic of ultrasonic vibration system is exactly resonance characteristic, is represented by resonance frequency
Rate, resonance impedance and resonance amplitude.In general, the resonance amplitude of ultrasonic vibration system, resonance impedance etc. are mainly by ultrasound
The material of energy converter, structure determine.Material relates generally to the core energy converslon materials i.e. selection of piezoelectric ceramic piece, and structure is main
Be related to energy converter node, and the layout etc. of vibration gain, while this triadic relation is for the frequency of ultrasonic transducer, impedance with
And amplitude is to influence each other, collective effect.
In this structure of the prior art as depicted in figs. 1 and 2, pretightning force is to pre-tighten bar by being attached at completely
Pressure is reached piezoelectric ceramic piece by metal block afterwards.Therefore, after ultrasonic transducer in the prior art metal block biggish thickness
Degree just will affect ultrasound resonance system (that is, ultrasonic surgical instrument) pressure be effectively conducted and the uniformity, also will increase ultrasound it is humorous
The impedance of vibrating system, to influence the conversion ratio of the system capacity.Further, since being heat under energy converter high power work state
Emission source, temperature effect clearly, due to metal block after in the prior art and pre-tighten the structure that screw rod is sticked, to energy converter
Thermal diffusion, heat transfer have certain influence.Especially under high-power state, thermal diffusion is also more, is unfavorable for improving the heat of energy converter
Environment.And this apparent temperature is very unfavorable on the influence of the performance of energy converter.
Utility model content
For this purpose, can not only improve the resonance of energy converter the utility model proposes a kind of novel energy converter pre-pressing structure
Impedance and conductive performance can also improve the operating temperature field of energy converter, so that it is guaranteed that energy converter has preferably electromechanical coupling
Close effect and good resonant operational state.
Embodiment according to the present utility model provides a kind of ultrasonic transducer, is used for ultrasonic surgical instrument, and feature exists
Include pre-tightening bar, rear metal block, piezoelectric ceramic piece, electrode slice and preceding metal block in, the ultrasonic transducer, the preload bar, after
Metal block, piezoelectric ceramic piece, electrode slice and preceding metal block sequentially coaxially connect；Wherein: the rear metal block is provided with concave part,
And the preload bar is embedded in the concave part of the rear metal block.So as to improve the topology layout of ultrasonic transducer, effectively pass
Pressure has been led, the resonance characteristic of ultrasound resonance system is improved.
In the other embodiment of the utility model, the concave part depth of the rear metal block of the ultrasonic transducer can be
1/3 to the 3/5 of the rear metal block height.
In the other embodiment of the utility model, the diameter D2 of the concave part of the rear metal block is whole with rear metal block
The ratio D2/D1 of body diameter D1 is more than or equal to 0.75.
In the other embodiment of the utility model, which includes head and the body of rod, the groove of the rear metal block
Portion's depth can be less than the head height of the preload bar.
In the other embodiment of the utility model, the head of the preload bar can be higher by the first table of the rear metal block
The height in face can be 3/5 to the 3/4 of the head height.
In the other embodiment of the utility model, the head diameter of the preload bar can be less than the recessed of the rear metal block
The diameter of groove portion.
In the other embodiment of the utility model, secondary support surface has been can be set in the head of the preload bar, should
Secondary support surface can be symmetrically arranged.
In the other embodiment of the utility model, the secondary support surface number of the preload club head can be even number
It is a.
In the other embodiment of the utility model, which can be higher than the first table of the rear metal block
Face.
In the other embodiment of the utility model, the material of the preload bar can be titanium alloy.
In the other embodiment of the utility model, the material of the rear metal block can be steel.
In the other embodiment of the utility model, which can connect amplitude transformer, which can be with
For half-wavelength variable section structure.
Other embodiment according to the present utility model, can provide a kind of ultrasonic surgical instrument, including host, cutter head,
Waveguide rod can also include ultrasonic transducer as described above.
In the embodiments of the present invention, by the way that the head for pre-tightening bar to be embedded in rear metal block, to reduce
Pre-tighten the club head portion volume and quality accounting of screw rod, it is ensured that effective transmitting of pressure and high-frequency vibration and energy converter are equal
Even, pure vibration mode.To which the energy converter of the embodiments of the present invention has more Low ESR, there is more preferably temperature field
Distribution, better resonance characteristic, under high power work environment, the temperature field of optimization makes energy converter have preferably work shape
State.
Detailed description of the invention
Attached drawing is used to provide a further understanding of the present invention, and constitutes part of specification, practical with this
New embodiment is used to explain the utility model together, does not constitute limitations of the present invention.In the accompanying drawings:
Fig. 1 instantiates the structural schematic diagram of the typical ultrasonic transducer of the prior art；
Fig. 2 instantiates the side view of the ultrasonic transducer of the prior art；
Fig. 3 instantiates the decomposition diagram of the ultrasonic transducer according to the utility model embodiment；
Fig. 4 instantiates the side view of the ultrasonic transducer according to the utility model embodiment；
Fig. 5 instantiates the schematic diagram of the rear metal block of the ultrasonic transducer according to the utility model embodiment；
Fig. 6 instantiates the schematic diagram of the preload bar according to the ultrasonic transducer of the utility model embodiment；
Fig. 7 instantiates the schematic diagram of the preload bar according to the ultrasonic transducer of the utility model embodiment；
Fig. 8 instantiates the side view of the preload bar according to the ultrasonic transducer of the utility model embodiment；
Fig. 9 instantiates the side view of the preload bar according to the ultrasonic transducer of the utility model embodiment；
Figure 10 instantiates the assembling of the preload screw rod and rear metal block according to the ultrasonic transducer of the utility model embodiment
Structure chart；
Figure 11 instantiates the schematic diagram of the preceding metal block of the ultrasonic transducer according to the utility model embodiment；
It includes ultrasonic transducer ultrasonic surgical instrument and the prior art that Figure 12, which is instantiated according to the utility model embodiment,
System frequency-impedance curve comparison diagram；
Figure 13 instantiates the ultrasonic transducer and ultrasonic transducer in the prior art according to the utility model embodiment
The comparison diagram of thermo parameters method；And
Figure 14 instantiates the mode displacement distribution map according to the ultrasonic transducer of the utility model embodiment.
Specific embodiment
The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model
It clearly and completely describes, it is clear that the embodiments are a part of the embodiments of the present invention, rather than whole implementation
Example.
In the drawings and embodiments the use of element/component of same or like label is same or like for representing
Part.And attached drawing is only schematical, and element therein is not necessarily to perspec-tive.
Fig. 3 instantiates the ultrasonic transducer decomposition diagram according to the utility model one embodiment.As shown in Fig. 3, this
The ultrasonic transducer 30 of utility model embodiment, including pre-tighten bar 310, rear metal block 320, piezoelectric ceramic piece 331, electrode slice
332 (piezoelectric ceramic piece and electrode slice form brilliant heap 330) and preceding metal block 340.Pre-tighten bar 310, rear metal block 320, piezoelectricity
Potsherd 331, electrode slice 332 and preceding metal block 340 sequentially coaxially connect, i.e., stack according to the same axis of symmetry A-A heap
Come.
Fig. 4 instantiates the side view of the ultrasonic transducer according to the utility model embodiment.As shown in figure 4, being set in pre-
It is provided with concave part 321 in rear metal block 320 on tight bar 310, bar 310 is pre-tightened and is embedded in the concave part 321, to pre-tighten
Bar 310 is more closely connect with rear metal block 320.
As shown in Figure 3 and Figure 4, piezoelectric ceramic piece 331 is arranged in the centre of energy converter 30, electrode slice 332 and piezoelectric ceramics
Piece 331 is staggeredly placed, so that electric signal can be applied to piezoelectric ceramic piece 331.Metal block 320, preceding metal block 340 are distributed afterwards
It, will finally by bar 310 is pre-tightened in (or the left and right, this is up and down depending on energy converter 30 or left and right is placed) up and down of piezoelectric ceramic piece
Each component of vibrational system is tightly pressed into an entirety.And to keep well contacting between each part side of ultrasonic transducer and face, with
The efficient propagation of guarantee sound energy.To this novel structural improvement topology layout of ultrasonic transducer, it is effectively conducted pressure
Power improves the resonance characteristic of ultrasound resonance system.
By each component materials characteristic, i.e. Young's modulus and density and axial length dimension is total to transducer vibrations frequency
With decision.In the utility model embodiment, the working frequency of ultrasonic vibration system is about in 55.5KHz or so, this frequency
Also the approximate size and the distribution of each part length of energy converter are just determined.In the embodiments of the present invention, energy converter
Preceding metal block 340 is connected with the luffing rod structure of half-wavelength, to amplify the effect from transducer vibrations.And energy converter is whole
Body size is about 90mm, and wherein amplitude transformer partial-length is about 49mm.Transducer vibrational amplitude by core component piezoelectric ceramic piece,
And energy converter overall structure determines, and transducer impedance is determined by core component piezoelectric ceramic piece and pre-pressing structure.
Wherein, the frequency f of energy converter may be expressed as:
F=(sqrt (E/ ρ))/2*L (1)
Wherein, E is the Young's modulus of material, and ρ is density of material, and L represents transducer length.
In the embodiments of the present invention, the size relationship of energy converter each section, in the item for meeting basic assembly relation
Under part, the concrete composition of each section is determined by following free vibration characteristic equation:
([K]-ω2[M]){U0}={ 0 } (2)
Wherein, [K] indicates that the stiffness matrix of transducer system, [M] indicate the mass matrix of transducer system, U0It indicates
The vibration displacement of transducer system, ω indicate the vibration circular frequency of the system.For our vibrational system, the material of each section
It is known, while object construction frequencies omega is also known, then meets the vibration displacement U of vibration shape requirement0Corresponding System Nature
Moment matrix is exactly the aimed quality matrix of the utility model embodiment namely the composition of energy converter each section quality so that it is determined that each
Part-structure composition.
In the embodiments of the present invention, the pre-pressing structure of energy converter include rear metal block 320, preceding metal block 340 with
And bar 310 is pre-tightened, they come together to fasten brilliant heap, form closely an entirety, i.e. energy converter.Fig. 5 is instantiated according to this reality
With the schematic diagram of the rear metal block of the ultrasonic transducer of new embodiment.As shown in figure 5, being provided in rear metal block 320 recessed
Groove portion 321 is rendered as staircase structural model from then metal block 320, with first surface S1, second surface S2 and third table
Face S3.First surface S1 is datum level, is not contacted with other component, using a part as oscillating mass.Metal block 320 afterwards
Second surface S2, as interior step formed concave part 321 surface, have diameter more lesser than other surfaces.This second
Surface S2 directly contacts (that is, contacting with the third surface for pre-tightening bar) with preload bar 310, is the source of piezoelectric ceramics crystalline substance heap pressure
Face.In the embodiments of the present invention, the diameter of second surface S2 can be identical as the head diameter of bar is pre-tightened, and can also compare
The head diameter for pre-tightening bar is bigger, to guarantee the transmitting of pressure.Then the third surface S3 of metal block 320 is directly to make pottery with piezoelectricity
The surface of tile contact and the direct acting surface of stack of piezo crystals pressure.
From the above mentioned it is found that energy converter is a specific dither system, each section quality need to be according to certain ratio
Example combination can just guarantee that energy converter has uniform, pure vibration mode in this way.In the embodiments of the present invention, after
The depth of groove of metal block 320 can be less than the head height for pre-tightening bar 310.In the embodiments of the present invention, rear metal
Depth of groove d in block 320 can be 1/3 to the 3/5 of the rear metal block height h, so that it is guaranteed that pressure it is more effective transmit with
And high-frequency vibration is so that energy converter has uniform, the pure vibration shape.
In the embodiments of the present invention, after the diameter D2 ratio of the concave part (step in also referred to as) of rear metal block 320
The integral diameter D1 of metal block 320 wants small, can be set to D2/D1 >=0.75, with ensure rear metal block have suitable quality
And effective pressure transmitting.
Fig. 6 instantiates the schematic diagram of the preload bar according to the ultrasonic transducer of the utility model embodiment.As shown in fig. 6,
Pre-tightening bar 310 includes head 311 and the body of rod 312.In the embodiments of the present invention, after being embedded at preload bar 310
In metal block 320, the diameter of head 311 is less than or the diameter of the concave part 321 equal to the rear metal block.In order to more effective
Transmitting pressure, the diameter of the concave part 321 of the rear metal block 320 of the utility model embodiment can be greater than the straight of head 311
Diameter.In the embodiments of the present invention, the diameter of concave part 321 can be greater than 0.2~0.5mm of diameter of head 311.
It is convenient for installation in the embodiments of the present invention, Auxiliary support table can be set in head 311
Face, to guarantee that torque spanner can effectively apply in torque to preload screw rod.Fig. 7 is instantiated according to the utility model embodiment
Ultrasonic transducer preload bar top view.As shown in Figure 6 and Figure 7, head 311 has first surface S4, second surface S5
It is secondary support surface with third surface S6, second surface S5.In the embodiments of the present invention, second surface can be by more
A secondary support surface composition, these secondary support surfaces are in symmetric arrays.For example, in Fig. 7, it is auxiliary in input terminal club head portion
Support surface is helped to can be set to symmetrical 2.Fig. 8 instantiates the preload of the ultrasonic transducer according to the utility model embodiment
The top view of bar.As shown in figure 8, secondary support surface can be set to symmetrical 4.Fig. 9 is instantiated according to the utility model
The top view of the preload bar of the ultrasonic transducer of embodiment.As shown in figure 9, secondary support surface can be set to symmetrical 6.
It is, of course, also possible to be set as any symmetrical even number.In the embodiments of the present invention, secondary support surface can also be set
It is set to round table surface, energy converter assembles for convenience at this time, and Tightening moment can be applied to acting surface design on rear metal block.
In the embodiments of the present invention, the second surface for pre-tightening bar will be lower than first surface, but is assembling Shi Yaogao
First surface a part of metal block 320 after out, to guarantee to be unlikely to and rear metal during compression (assembly) energy converter
Block generates friction and damages.
Figure 10 instantiates the assembling of the preload screw rod and rear metal block according to the ultrasonic transducer of the utility model embodiment
Structure chart.As shown in Figure 10, when pre-tighten bar 310 with after metal block 320 assemble after, pre-tighten some d2 of the head of screw rod
It is embedded in the concave part (or interior step) of rear metal block, and the Auxiliary support step surface (or secondary support surface) for pre-tightening bar is wanted
First surface than rear metal block is slightly higher, and the height d3 being higher by can be 1/5th or so of head height, to take into account
The demand of vibration mode.As shown in figure 9, head height d is height of the head first surface to second surface (secondary support surface)
Spend d1 and built-in part height d2 (i.e. the depth of concave part) and secondary support surface to rear metal block first surface height d3
The sum of three can be expressed as d=d1+d2+d3.
In the embodiments of the present invention, the head of preload bar 310 is higher by the height of the first surface of rear metal block 320
It can be 3/5 to the 3/4 of head height, can choose is 2/3 or so of head height, can also be with built-in part height substantially
It is equal.The mass combination of this optimization can provide more preferably system resonance characteristic, and closer connection also causes this practical
The embedded pre-pressing structure of new embodiment can provide more preferably heat transfer.
It should be understood that steel has thermal coefficient more better than titanium alloy, it is more advantageous to heat transfer.And medical transducer
It is generally mounted in (being not shown herein) inside Handleset, is not no radiator, this is just to the topology layout of energy converter
There is higher requirement with material selection.In the embodiments of the present invention, the rear metal block of steel can be used, is more advantageous to
Heat transfer.Bar can also be pre-tightened using titanium alloy to be embedded in rear metal block, since titanium alloy has smaller quality accounting, from
And energy converter entirety heat transfer is made to become better.
Figure 13 instantiates the ultrasonic transducer and ultrasonic transducer in the prior art according to the utility model embodiment
The comparison diagram of thermo parameters method, as shown in figure 13, the utility model embodiment has lower temperature field under the same conditions.And
Temperature is to measure an important indicator of energy converter, especially under high-power environment.Under high power work, energy converter heating
Obviously, sharply so that the piezoelectric property of the piezoelectric ceramic piece of energy converter generates depolarization, the efficiency of energy converter can drop for temperature rise meeting
It is low, piezoelectric ceramic piece can be made to lose piezoelectric property when it has arrived certain value, to lose the characteristic of energy conversion.Such as Figure 13 institute
Show, the structure of the embodiments of the present invention effectively mitigates the temperature rise of energy converter, and energy converter can be allowed to be continuously in efficient shape
State, so that energy converter be made to be in better working condition.
The energy converter of the utility model embodiment further includes preceding metal block 340.Figure 11 instantiates the utility model embodiment
Preceding metal block structural schematic diagram.As shown in figure 11, the first surface p1 of preceding metal block and piezoelectric ceramics crystalline substance pile structure are direct
Contact, so the finish of the first surface p1 of preceding metal block has important shadow to the energy dissipation namely impedance of energy converter
It rings, finish is better, and smaller with the frictional dissipation of piezoelectric ceramic piece, the resonance impedance of energy converter is with regard to smaller.Preceding metal block 340
The first screw holePre-pressing structure just is formed with preload bar 310, pre-fastening moment is applied to stack of piezo crystals.And preceding metal block 340
The second screw holeGuarantee effective transmitting of sound energy for connecting knife bar.Preceding metal block (the forerunner of the utility model embodiment
Structure) it include half-wavelength luffing rod structure (the preceding metal block is connected with amplitude transformer) 341, transducer vibrations are come to amplify
Effect.From loss theory of wave propagation this and can reduce wave and propagate energy, while assembling procedure can be reduced again.This
The amplitude transformer 341 of utility model embodiment is designed using variable cross-section, while having circular arc excessive again, can both be amplified to come from this way and be changed
The amplitude of energy device, and the frequency of adjustable vibrational system.In order to meet the requirement of amplification coefficient, input diameter D and output are straight
Diameter d need to meet certain relationship, this is closely related with amplification factor, and in the embodiments of the present invention, amplitude transformer will reach
3.5 or more amplification coefficient, then D and d need to meet intimate 2 times of relationship.In the embodiments of the present invention, amplitude transformer
Flange arrangement can be set at vibration nodal point, be used for fixing of energy converter.
In the embodiments of the present invention, above-mentioned component is assembled using suitable frock clamp, then is realized efficient
The energy converter of electromechanical coupled vibration system.By applying electric signal at the both ends of piezoelectric ceramic piece, energy converter can start work
Make, electric energy is changed into mechanical energy, to be transferred to waveguide rod, waveguide rod starts to vibrate, to realize cutter head cutting tissue or stop
The functions such as blood.
In the embodiments of the present invention, a kind of ultrasonic surgical instrument, including host, cutter head, waveguide rod are additionally provided,
It further include ultrasonic transducer as described above, to more efficiently be operated with better resonance characteristic, the vibration shape more evenly.
Impedance curve be one of ultrasonic vibration system it is most basic be also one of most important measurement standard, ultrasonic vibration system
The fundamental characteristics of system can nearly all reflect inside impedance curve.Figure 12 is instantiated according to the utility model embodiment
System frequency including ultrasonic transducer ultrasonic surgical instrument and the prior art-impedance curve comparison diagram.As shown in figure 12, this reality
There is the impedance curve of continuous and derivable with the energy converter of new embodiment, the bandwidth of two resonance points has more up to 800Hz or so
Wide frequency, namely there is broader phase margin.And its resonance impedance is only 10 Europe or so, while the amplification factor of energy converter
Reach 4 or so.With previous comparison of design, energy converter described in the utility model shows more preferably impedance curve, attached in resonance point
Closely there is lower impedance, while there is broader frequency range between resonance point and antiresonance point.It is clear that this is practical new
The energy converter of type embodiment has better resonant frequency characteristic, has broader phase margin, this table between two resonance points
Energy converter described in bright this patent has better mechanical-electric coupling degree, it is easier to match with host system, to keep good work
State.Especially under the fierce environment of high-power comparison, this characteristic of energy converter is even more important, and more preferably frequency characteristic makes
Energy converter is in resonant operational state always, keeps efficiently output.
Figure 14 instantiates the mode displacement distribution map according to the ultrasonic transducer of the utility model embodiment.Such as Figure 12 institute
Show, the energy converter of the utility model embodiment has highly uniform Displacements Distribution, simultaneously amplifies multiple and reaches 4.08.
In the description of the present invention, it should be understood that term " center ", " longitudinal direction ", " transverse direction ", " length ", " width
Degree ", " thickness ", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom" "inner", "outside", " suitable
The orientation or positional relationship of the instructions such as hour hands ", " counterclockwise ", " axial direction ", " radial direction ", " circumferential direction " is orientation based on the figure
Or positional relationship, be merely for convenience of describing the present invention and simplifying the description, rather than the device of indication or suggestion meaning or
Element must have a particular orientation, be constructed and operated in a specific orientation, therefore should not be understood as the limit to the utility model
System.
In the present invention unless specifically defined or limited otherwise, term " installation ", " connected ", " connection ", " Gu
It is fixed " etc. terms shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or integral；It can be
Mechanical connection, is also possible to be electrically connected；It can be directly connected, two can also be can be indirectly connected through an intermediary
The interaction relationship of connection or two elements inside element, unless otherwise restricted clearly.For the common skill of this field
For art personnel, the concrete meaning of above-mentioned term in the present invention can be understood as the case may be.
In the description of this specification, reference term " the present embodiment ", " one embodiment ", " some embodiments ", " show
The description of example ", " specific example " or " some examples " etc. mean specific features described in conjunction with this embodiment or example, structure,
Material or feature are contained at least one embodiment or example of the utility model.In the present specification, to above-mentioned term
Schematic representation be necessarily directed to identical embodiment or example.Moreover, description specific features, structure, material or
Person's feature may be combined in any suitable manner in any one or more of the embodiments or examples.In addition, in not conflicting feelings
Under condition, those skilled in the art by different embodiments or examples described in this specification and different embodiment or can show
The feature of example is combined.The utility model relates to " A and/or B ", it can be understood as including tri- kinds of feelings of A, B and AB
Condition；In addition, the utility model relates to " sound wave " be interpreted as " ultrasonic wave ", unless otherwise indicated.
In addition, term " first ", " second " are used for descriptive purposes only and cannot be understood as indicating or suggesting relative importance
Or implicitly indicate the quantity of indicated technical characteristic.Define " first " as a result, the feature of " second " can be expressed or
Implicitly include at least one this feature.
The above is only the preferred embodiment of the utility model only, is not intended to limit the utility model, all at this
Made any modification, equivalent replacement and simple modifications etc., should be included in the utility model in utility model substantive content
Within protection scope.
Claims (12)
1. a kind of ultrasonic transducer, be used for ultrasonic surgical instrument, which is characterized in that the ultrasonic transducer include pre-tighten bar, after
Metal block, piezoelectric ceramic piece, electrode slice and preceding metal block, the preload bar, rear metal block, piezoelectric ceramic piece, electrode slice with
And preceding metal block sequentially coaxially connects；Wherein:
Metal block is provided with concave part after described, and
The bar that pre-tightens is embedded in the concave part of the rear metal block.
2. ultrasonic transducer as described in claim 1, wherein the concave part depth of metal block is the rear metal block after described
1/3 to the 3/5 of height.
3. ultrasonic transducer as described in claim 1, wherein the preload bar includes head and the body of rod, the rear metal block
Concave part depth be less than it is described pre-tighten bar head height.
4. ultrasonic transducer as claimed in claim 2, wherein the preload bar includes head and the body of rod, the rear metal block
Concave part depth be less than it is described pre-tighten bar head height.
5. ultrasonic transducer as claimed in claim 3, wherein the head for pre-tightening bar is higher by the first of the rear metal block
The height on surface is 3/5 to the 3/4 of the head height.
6. ultrasonic transducer as claimed in claim 4, wherein the head for pre-tightening bar is higher by the first of the rear metal block
The height on surface is 3/5 to the 3/4 of the head height.
7. the ultrasonic transducer as described in any one of claim 3 to 6, wherein the head diameter for pre-tightening bar is less than institute
State the diameter of the concave part of rear metal block.
8. the ultrasonic transducer as described in any one of claims 1 to 6, wherein the head for pre-tightening bar is provided with auxiliary
Support surface, the secondary support surface are symmetrically arranged.
9. ultrasonic transducer as claimed in claim 8, wherein the secondary support surface is higher than the first of the rear metal block
Surface.
10. the ultrasonic transducer as described in any one of claims 1 to 6, wherein the diameter of the concave part of metal block after described
The ratio D2/D1 of the integral diameter D1 of D2 and rear metal block is more than or equal to 0.75.
11. the ultrasonic transducer as described in any one of claims 1 to 6, wherein the preceding metal block is connected with amplitude transformer,
The amplitude transformer is half-wavelength variable section structure.
12. a kind of ultrasonic surgical instrument, including host, cutter head, waveguide rod, it is characterised in that further include such as claims 1 to 11
Any one of described in ultrasonic transducer.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110882881A (en) * | 2018-09-11 | 2020-03-17 | 北京锐诺医疗技术有限公司 | Ultrasonic transducer for ultrasonic surgical instrument and ultrasonic surgical instrument thereof |
| CN112570243A (en) * | 2019-09-30 | 2021-03-30 | 重庆西山科技股份有限公司 | Method and system for controlling pretightening force of ultrasonic transducer |
| CN113426652A (en) * | 2021-08-26 | 2021-09-24 | 常州思派智能科技有限公司 | Auxiliary device applying inverse piezoelectric effect of piezoelectric ceramic piece and piezoelectric ceramic actuator |
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2018
- 2018-09-11 CN CN201821481442.2U patent/CN209379354U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110882881A (en) * | 2018-09-11 | 2020-03-17 | 北京锐诺医疗技术有限公司 | Ultrasonic transducer for ultrasonic surgical instrument and ultrasonic surgical instrument thereof |
| CN110882881B (en) * | 2018-09-11 | 2023-03-28 | 苏州锐诺医疗技术有限公司 | Ultrasonic transducer for ultrasonic surgical instrument and ultrasonic surgical instrument thereof |
| CN112570243A (en) * | 2019-09-30 | 2021-03-30 | 重庆西山科技股份有限公司 | Method and system for controlling pretightening force of ultrasonic transducer |
| CN113426652A (en) * | 2021-08-26 | 2021-09-24 | 常州思派智能科技有限公司 | Auxiliary device applying inverse piezoelectric effect of piezoelectric ceramic piece and piezoelectric ceramic actuator |
| CN113426652B (en) * | 2021-08-26 | 2021-11-02 | 常州思派智能科技有限公司 | Auxiliary device applying inverse piezoelectric effect of piezoelectric ceramic piece and piezoelectric ceramic actuator |
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Effective date of registration: 20200811 Address after: Room 401, building 15, Xibei District, nano City, 99 Jinjihu Avenue, Suzhou Industrial Park, Suzhou City, Jiangsu Province Patentee after: Suzhou Ruinuo Medical Technology Co.,Ltd. Address before: 100085, basement -1, basement 1, building A, 3rd Street, Haidian District, Beijing, 445 Patentee before: BEIJING RUINUO MEDICAL TECHNOLOGY Co.,Ltd. |