阅读说明：本技术 一种超声外科器械变幅杆及其超声外科器械 (A kind of ultrasonic surgical instrument amplitude transformer and its ultrasonic surgical instrument ) 是由 孙齐齐 刘佳 王东 于 2019-08-30 设计创作，主要内容包括：本发明提供了一种超声外科器械变幅杆,上述变幅杆包括前端执行端、使上述变幅杆达到预定振幅比的结构以及尾部连接结构,上述使上述变幅杆达到预定振幅比的结构位于上述前端执行端与上述尾部连接结构之间。能更大程度的提高变幅杆疲劳寿命、缓解局部应力以及更好提升组织切割速度。(The present invention provides a kind of ultrasonic surgical instrument amplitude transformers, above-mentioned amplitude transformer includes front end actuating station, above-mentioned amplitude transformer is made to reach the structure and tail portion connection structure of predetermined amplitude ratio, and the above-mentioned structure for making above-mentioned amplitude transformer reach predetermined amplitude ratio is between above-mentioned front end actuating station and above-mentioned tail portion connection structure.Amplitude transformer fatigue life can greatly be improved, alleviate local stress and more preferable promotion tissue cutting speed.)

1. a kind of ultrasonic surgical instrument amplitude transformer, which is characterized in that the amplitude transformer includes front end actuating station, makes the amplitude transformer Reach the structure and tail portion connection structure of predetermined amplitude ratio, the structure for making the amplitude transformer reach predetermined amplitude ratio is located at Between the front end actuating station and the tail portion connection structure.

2. ultrasonic surgical instrument amplitude transformer according to claim 1, which is characterized in that described that the amplitude transformer is made to reach pre- The structure for determining amplitude ratio is that the amplitude transformer is instigated to reach scheduled amplification factor, that is, improves the front end actuating station output amplitude Ability.

3. ultrasonic surgical instrument amplitude transformer according to claim 2, which is characterized in that the predetermined amplitude ratio is greater than 1.

4. ultrasonic surgical instrument amplitude transformer according to claim 1, which is characterized in that described that the amplitude transformer is made to reach pre- The structure for determining amplitude ratio is intermediate gain structure, and the intermediate gain structure is located at the amplitude transformer antinode.

5. ultrasonic surgical instrument amplitude transformer according to claim 4, which is characterized in that the intermediate gain structure is cosine Gaining structure or sinusoidal gains structure.

6. ultrasonic surgical instrument amplitude transformer according to claim 1, which is characterized in that described that the amplitude transformer is made to reach pre- The structure for determining amplitude ratio is stress compensation structure, and the stress compensation structure is located at the amplitude transformer antinode or the luffing The two sides of bar node.

7. ultrasonic surgical instrument amplitude transformer according to claim 4, which is characterized in that the intermediate gain structure is located at every At a amplitude transformer antinode.

8. ultrasonic surgical instrument amplitude transformer according to claim 6, which is characterized in that the stress compensation structure distinguishes position In the two sides of each amplitude transformer antinode.

9. ultrasonic surgical instrument amplitude transformer according to claim 6, which is characterized in that the stress compensation structure distinguishes position In the antinode two sides near the front end actuating station.

10. a kind of ultrasonic surgical instrument including any ultrasonic surgical instrument amplitude transformer of claim 1 to 9, the tail Portion connecting structure is used to connect the energy converter of the amplitude transformer Yu the ultrasonic surgical instrument, and the connection type includes that screw thread connects Connect, weld or gluing connection.

Technical field

The present invention relates to medical instruments field, further to medical instrument energy surgical field, in particular to one Kind ultrasonic surgical cutting device.

Background technique

The invention patent relates to medical instrument energy surgical fields, specifically, being that a kind of ultrasonic surgical is cut Cutter tool, hereinafter referred to as ultrasound knife.

Ultrasound knife main functionality part is amplitude transformer, mainly includes front end actuating station, intermediate gain structure, tail portion connection Structure.

The key of existing ultrasound knife technology is amplitude transformer, utilizes the fuel factor of the high-frequency vibration generation of amplitude transformer front end, sky Change effect, mechanical oscillation etc. to make instrument so that biological tissue is cut off and is solidified with a relatively low temperature.Ultrasonic vibration frequency Rate is generally 20 kHz (kHz) to 60 kHz (kHz), it means that amplitude transformer can generate 7.2 × 10 per hour⁷To 2.16 ×10⁸Secondary alternately to vibrate, according to fatigue damage Miner theoretical (fatigue cumulative damage is theoretical), the vibrating fatigue of amplitude transformer belongs to Super high cycle fatigue can all have strict requirements to the structural strength of amplitude transformer and material in this way.Furthermore, it is recognized that a=5 × 10⁴g Acceleration value be biological tissue cutting threshold, according to formula: amplitude A=α/((2 π f)²), it is easy to extrapolate when preset When resonant frequency is lower, the demand of amplitude will be bigger, and amplitude is bigger, and the mean stress of amplitude transformer is also bigger, it is intended that Amplitude transformer is difficult to design and apply under lower resonant frequency, meanwhile, this relationship is limited to be mentioned under the premise of resonant frequency is certain The ability of high amplitude transformer cutting Tissue velocity, because the somewhere stress that will lead to amplitude transformer in this way is concentrated, to substantially cut down it Service life.

A kind of amplitude transformer with gain step is disclosed in patent CN200480036431.8, it mainly shows to pass through control Gain step processed obtains biggish cutter head amplitude at a distance from node of oscillations；One is disclosed in patent CN201410068159.7 Kind, which is repeated cyclically structure, enables ultrasonic surgical blade to work under stable frequency；Patent CN105962996 discloses a kind of knot Structure can be with the amplitude and frequency of structure adjusting amplitude transformer.Three above patent only goes design amplitude transformer from the angle of amplitude or frequency Structure, and to practical ultrasound knife application key: stress is not contemplated with fatigue life.

Therefore the defect based on the prior art, the technical solution of the present invention technical issues that need to address are:

1. amplitude transformer vibration belongs to super high cycle fatigue, fatigue life is difficult to ensure；

2. amplitude transformer is difficult to design and apply under lower resonant frequency；

3. the ability for improving amplitude transformer cutting Tissue velocity under the premise of resonant frequency is certain is limited.

Summary of the invention

The present invention provides a kind of ultrasonic surgical instrument amplitude transformer and its ultrasonic surgical instruments, at least can effectively solve change Width bar fatigue life is low, local stress is big, promotes the problems such as tissue cutting speed.

The embodiment of the invention provides a kind of ultrasonic surgical instrument amplitude transformer, above-mentioned amplitude transformer includes front end actuating station, makes Above-mentioned amplitude transformer reaches the structure and tail portion connection structure of predetermined amplitude ratio, above-mentioned that above-mentioned amplitude transformer is made to reach predetermined amplitude ratio Structure between above-mentioned front end actuating station and above-mentioned tail portion connection structure.

Optionally, the above-mentioned structure for making above-mentioned amplitude transformer reach predetermined amplitude ratio is that above-mentioned amplitude transformer is instigated to reach scheduled Amplification factor improves the ability of above-mentioned front end actuating station output amplitude.

Optionally, above-mentioned predetermined amplitude ratio is greater than 1.

Optionally, the above-mentioned structure intermediate gain structure for making above-mentioned amplitude transformer reach predetermined amplitude ratio, above-mentioned intermediate increasing Beneficial structure is located at above-mentioned amplitude transformer antinode.

Optionally, above-mentioned intermediate gaining structure is cosine gaining structure or sinusoidal gains structure.

Optionally, the above-mentioned structure stress compensation structure for making above-mentioned amplitude transformer reach predetermined amplitude ratio, above-mentioned stress are mended Compensation structure is located at the two sides of above-mentioned amplitude transformer antinode or above-mentioned amplitude transformer node.

Optionally, above-mentioned intermediate gaining structure is located at each above-mentioned amplitude transformer antinode.

Optionally, above-mentioned stress compensation structure is located at the two sides of each above-mentioned amplitude transformer antinode.

Optionally, above-mentioned stress compensation structure is located near the antinode two sides of above-mentioned front end actuating station.

The embodiment of the invention also provides a kind of ultrasonic surgical instruments including any above-mentioned ultrasonic surgical instrument amplitude transformer Tool, above-mentioned tail portion connection structure are used to connect the energy converter of above-mentioned amplitude transformer Yu above-mentioned ultrasonic surgical instrument, above-mentioned connection type It is connected including threaded connection, welding or gluing.

Ultrasonic surgical instrument amplitude transformer of the present invention is referred to as amplitude transformer.

Wherein cosine gaining structure can be replaced with stress compensation structure, it is only necessary to which there is cosine gaining structure or stress to mend A structure in compensation structure just can solve at least one problem, i.e., reduction amplitude transformer is vibrated brought super high cycle fatigue and prolonged Long-fatigue life；And/or under the premise of resonant frequency is certain, the ability of amplitude transformer cutting Tissue velocity is improved.

Front end actuating station is located relative to the distalmost end of operator, directly contacts with destination organization, and tail portion connection structure is used In connection amplitude transformer and energy converter, the modes such as common screw thread, welding, gluing connect with energy converter, are normally at relative to operation The most proximal end of person, any position of the intermediate gain structure between front end actuating station and tail portion connection structure between the two.

Cosine gaining structure and stress compensation structure can be regarded as in order to enable amplitude transformer reaches expected times magnification The structure feature for counting (amplitude ratio) and raising fatigue life and using；Wherein cosine gaining structure reduces the super of amplitude transformer vibration High cycle fatigue damage improves amplitude transformer cutting tissue to extend fatigue life, and under the premise of resonant frequency is certain The ability of speed, stress compensation structure can effectively cut down the stress maximum at each node, so that the maximum of stress maximum Value effectively reduces, and output amplitude increases substantially, and without being bound by the height of resonant frequency, improves the tired longevity of amplitude transformer Life, and amplitude transformer under lower resonant frequency is effectively applied.

Amplitude transformer guarantees amplitude transformer from tail while obtaining large magnitude ratio (i.e. the ability of raising front end output amplitude) The phenomenon that equivalent stress of portion junction to front actuating station is not in abruptly increase or die-offs, steady strain curve, so that becoming The whole fatigue damage value under superelevation period cyclic loading of width bar is consistent, without hopping phenomenon, improves the fatigue life of amplitude transformer.

Detailed description of the invention

Fig. 1 is provided in an embodiment of the present invention a kind of optionally including the ultrasonic surgical instrument of amplitude transformer；

Fig. 2 is the enlarged diagram of the part Figure 1A；

Fig. 3 be it is provided in an embodiment of the present invention it is a kind of optionally include stress compensation knot at cosine gaining structure and one at one The amplitude transformer schematic diagram of structure；

Fig. 4 is provided in an embodiment of the present invention a kind of optionally including many places cosine gaining structure and many places stress compensation knot The amplitude transformer schematic diagram of structure；

Fig. 5 is provided in an embodiment of the present invention a kind of optionally including stress compensation knot at many places cosine gaining structure and one The amplitude transformer schematic diagram of structure；

Fig. 6 is a kind of spacing schematic diagram of optional stress compensation structure provided in an embodiment of the present invention；

Fig. 7 is a kind of optional compensation front and back stress curve contrast schematic diagram provided in an embodiment of the present invention；

Fig. 8 is a kind of optional compensation front and back amplitude curve contrast schematic diagram provided in an embodiment of the present invention；

Fig. 9 is the effect signal of a kind of optional compensated stress curve and amplitude curve provided in an embodiment of the present invention Figure.

Specific embodiment is only that the present invention is a kind of for further illustrating but being not limited to the present invention, following example below It is preferably carried out mode.

Exemplary embodiment is illustrated by detailed below, the example is illustrated in the accompanying drawings.Following description is related to When attached drawing, unless otherwise indicated, the same numbers in different attached drawings indicate the same or similar element.Following exemplary is implemented Embodiment described in example does not represent all embodiments consistented with the present invention.On the contrary, they are only and such as institute The example of device and method be described in detail in attached claims, that some aspects of the invention are consistent.

Specific embodiment