CN1235550C - Method for accurate checking resonant frequency of ultrasonic surgical knife - Google Patents
Method for accurate checking resonant frequency of ultrasonic surgical knife Download PDFInfo
- Publication number
- CN1235550C CN1235550C CN03131540.2A CN03131540A CN1235550C CN 1235550 C CN1235550 C CN 1235550C CN 03131540 A CN03131540 A CN 03131540A CN 1235550 C CN1235550 C CN 1235550C
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- Prior art keywords
- ultrasonic
- resonant frequency
- hand
- treatment head
- held treatment
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- 238000000034 method Methods 0.000 title claims description 8
- 238000007789 sealing Methods 0.000 claims abstract description 9
- 238000005516 engineering process Methods 0.000 claims description 5
- 238000002604 ultrasonography Methods 0.000 claims description 5
- 238000005538 encapsulation Methods 0.000 claims description 3
- 239000002131 composite material Substances 0.000 abstract 1
- 230000003247 decreasing effect Effects 0.000 abstract 1
- 239000000919 ceramic Substances 0.000 description 3
- 230000032683 aging Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000008280 blood Substances 0.000 description 1
- 210000004369 blood Anatomy 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000002560 therapeutic procedure Methods 0.000 description 1
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- Surgical Instruments (AREA)
- Dental Tools And Instruments Or Auxiliary Dental Instruments (AREA)
Abstract
The present invention relates to an ultrasonic surgical scalpel capable of accurately checking a resonant frequency. An electrical plug is used for being electrically connected with a host machine of the ultrasonic scalpel; an end cover and screw nails are used for being sealed with an outer shell of a handle; a rear cover plate is used for clamping a piezoelectric wafer; electrodes are used for being electrically connected with the piezoelectric wafer; the piezoelectric wafer 7 is used for converting electrical energy to ultrasonic mechanical energy; a sealing ring is used for sealing; the scalpel also comprises the outer shell of the hand, a scalpel head, etc. A design that a hand-held treatment head is composed of a composite body of a vibrator system with 1/4 wavelength matched with a step type amplitude-varying rod without a front cover plate at a first level is adopted, and a front cover plate of a traditional ultrasonic hand-held treatment head vibrator and the matching grade of a lambada/2 amplitude-varying rod connected with the front cover plate are simplified and omitted; therefore, the size of the external shape of the scalpel is greatly reduced, and the weight is decreased; according to the working size of delta l (approximately between 2 and 5mm) in a fine tuning formula after assembly, the ultrasonic hand-held treatment head can accurately works with a designed resonant frequency.
Description
One, technical field
The present invention relates to a kind of ultrasonic therapy instrument, particularly relate to as the ultrasonic surgical blade that hand-held treatment head is arranged in the ultrasonic surgical instrument, the especially a kind of method that can accurately revise the ultrasonic surgical blade resonant frequency.
Two, background technology
Ultrasonic surgical blade utilizes the supersonic vibration radiation, makes separate tissue, reaches the purpose of cutting, and does not damage surrounding tissue, goes out characteristics such as insufficiency of blood.At present, existing ultrasonic hand-held treatment head mostly adopt 1/2 wavelength oscillator and n doubly 1/2 wavelength horn constitute, but its selection, assembling and technological requirement in processing is very high, has error just can not satisfy the designing requirement of its resonant frequency slightly and scraps; Simultaneously, qualified ultrasonic hand-held treatment head store and use in lost efficacy or shortened service time because of aging, wearing and tearing etc. also easily causes this ultrasonic hand-held treatment to depart from its resonant frequency.
Three, summary of the invention
The objective of the invention is: provide a kind of and can accurately revise the ultrasonic surgical blade of resonant frequency: according to the thinking of " local resonance tool system ", a kind of succinct design has been proposed, the hand-held treatment head design of promptly adopting 1/4 wavelength oscillator system to cooperate the complex of the one-level horn,stepped of no front shroud to constitute, the front shroud of a traditional ultrasonic hand-held treatment oscillator and continuous λ/2 horn matching stages thereof are simplified omission, make its overall dimensions greatly reduce weight saving; According to formula (1) and formula (2),, ultrasonic hand-held treatment head is accurately worked on the resonant frequency of design simultaneously by assembling the processing dimension of Δ l (between the about 0.5～5mm of the scope of Δ l) in the fine adjustment type of back.
The object of the present invention is achieved like this: a kind of method of accurately revising the ultrasonic surgical blade resonant frequency comprises that end cap and screw are used for the encapsulation with handle casing; Back shroud is used for the clamping with piezoelectric chip; Electrode is used for and being electrically connected of piezoelectric chip, and piezoelectric chip is used to convert electric energy to and is ultrasonic mechanical energy; Sealing ring is used for sealing; Handle casing is the ultrasound knife cutter head fixedly, the hand-held treatment head design that the ultrasound knife cutter head adopts 1/4 wavelength oscillator system to cooperate the complex of the one-level horn,stepped of no front shroud to constitute, horn small end length l
1, l
4=λ/4+ Δ l, Δ l design technology tolerance, the resonant frequency of accurately revising ultrasonic hand-held treatment head after being used to assemble by assembling the processing dimension of Δ l in the fine adjustment type of back, can make ultrasonic hand-held treatment head accurately work on the resonant frequency of design.
In specific words:
(1) structure adopts sandwich type piezoelectric transducer version (as shown in Figure 1), and the PZT piezoelectric ceramic wafer constitutes one group of electro-acoustic transducer assembly (as shown in fig. 1).Intermediate electrode film adopts the thin electrodes pattern, and cylindrical and center-hole diameter are identical with piezoelectric chip.
(2) back shroud l
3(as shown in fig. 1) 1/4 wavelength oscillator system of piezoelectric ceramic wafer formation, length l
3By formula
With
Determine, and be loaded in the handle casing with piezoelectric ceramic wafer.
(3) ultrasonic amplitude transformer is the version (shown in I district among Fig. 1) of general horn,stepped, horn l
1The bar length overall by
l
1=(2n+1) λ/4 (1) are determined, n=1 in the formula (4-2), 2,3 ..., λ is a wave length of sound; IV district among Fig. 1 is the mounting process structure, is used for and being connected of handle casing.Horn small end length l
1
l
4In=λ/4+ Δ l (2) formula, Δ l design technology tolerance, the resonant frequency of accurately revising ultrasonic hand-held treatment head after being used to assemble.By the length of grinding Δ l, accurately revise the resonant frequency of ultrasonic hand-held treatment head.
Characteristics of the present invention are: the hand-held treatment head design of adopting 1/4 wavelength oscillator system to cooperate the complex of the one-level horn,stepped of no front shroud to constitute, the front shroud of a traditional ultrasonic hand-held treatment oscillator and continuous λ/2 horn matching stages thereof are simplified omission, make its overall dimensions greatly reduce weight saving; According to formula (1) and formula (2),, ultrasonic hand-held treatment head is accurately worked on the resonant frequency of design simultaneously by assembling the processing dimension of Δ l (between the about 0.5～5mm of the scope of Δ l) in the fine adjustment type of back.The present invention avoids accurately revising with the method for circuit regulating frequency the resonant frequency of ultrasonic hand-held treatment head, because the operating frequency of circuit itself is generally in ultransonic 20-35kc scope, the operating frequency of general permanent circuit is better, makes the reliable operation of circuit like this, and is more convenient for user.
Four, description of drawings
Fig. 1 can accurately revise the structural representation of resonant frequency ultrasonic surgical blade for the present invention
Among the figure: 1, plug is used for being electrically connected with the ultrasound knife main frame; 2, electric wire; 3, end cap and 4, screw are used for the encapsulation with handle casing; 5, back shroud is used for the clamping with piezoelectric chip; 6, electrode is used for and being electrically connected of piezoelectric chip, and 7, piezoelectric chip is used to convert electric energy to and is ultrasonic mechanical energy; 8, sealing ring is used for sealing; 9, handle casing and 10, cutter head etc.
Five, the specific embodiment
As assembling ultrasonic surgical blade among the figure, and make horn small end length l
1As the following formula design, have a mind to reserve Δ
l, between the about 0.5～5mm of its scope.
Δ l is the design technology tolerance, and the resonant frequency of the ultrasonic hand-held treatment head in assembling back decides by the length of grinding Δ l, promptly accurately revises the resonant frequency of ultrasonic hand-held treatment head.
Claims (2)
1, a kind of method of revising the ultrasonic surgical blade resonant frequency, described ultrasonic surgical blade comprises handle casing, ultrasound knife cutter head, electrode, piezoelectric chip, sealing ring, back shroud, end cap and screw, end cap and screw are used for the encapsulation with handle casing; Back shroud is used for the clamping with piezoelectric chip; Electrode is used for and being electrically connected of piezoelectric chip, and piezoelectric chip is used to convert electric energy to and is ultrasonic mechanical energy; Sealing ring is used for sealing; It is characterized in that the hand-held treatment head design that the ultrasound knife cutter head adopts 1/4 wavelength oscillator system to cooperate the complex of the one-level horn,stepped of no front shroud to constitute, horn small end length l
1, l
4=λ/4+ Δ l, Δ l design technology tolerance, the resonant frequency of revising ultrasonic hand-held treatment head after being used to assemble by assembling the processing dimension of Δ l in the fine adjustment type of back, works on the resonant frequency of design ultrasonic hand-held treatment head.
2, by the described method of revising the ultrasonic surgical blade resonant frequency of claim 1, it is characterized in that between scope 0.5～5mm of Δ l.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN03131540.2A CN1235550C (en) | 2003-05-23 | 2003-05-23 | Method for accurate checking resonant frequency of ultrasonic surgical knife |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN03131540.2A CN1235550C (en) | 2003-05-23 | 2003-05-23 | Method for accurate checking resonant frequency of ultrasonic surgical knife |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1451358A CN1451358A (en) | 2003-10-29 |
| CN1235550C true CN1235550C (en) | 2006-01-11 |
Family
ID=29222953
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN03131540.2A Expired - Fee Related CN1235550C (en) | 2003-05-23 | 2003-05-23 | Method for accurate checking resonant frequency of ultrasonic surgical knife |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1235550C (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113145883B (en) * | 2021-04-27 | 2022-06-10 | 汇专机床有限公司 | Machine tool, cold-pressing ultrasonic knife handle and ultrasonic machining device |
| CN113598889B (en) * | 2021-07-23 | 2023-11-03 | 北京航空航天大学 | Ultrasonic tissue cutting knife |
| CN114271902B (en) * | 2022-01-19 | 2023-08-01 | 深圳臣诺医疗器械有限公司 | Method and device for improving control precision of surgical knife, surgical knife and medium |
| CN115138546B (en) * | 2022-06-29 | 2023-05-26 | 湖南大学 | Ultrasonic surgical knife with longitudinal composite amplitude transformer and design method thereof |
-
2003
- 2003-05-23 CN CN03131540.2A patent/CN1235550C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN1451358A (en) | 2003-10-29 |
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