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US 11,911,062 B2Granted
Transducer for ultrasonic scalpel
AssigneeInnolcon Medical Technology (Suzhou) Co., Ltd.
InventorsZhongyu Yan, Lei Wang, Wei Luo
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Abstract
A transducer for an ultrasonic scalpel, which comprises, from distal end to proximal end of a connecting feature, a fixing feature, a horn, a piezoelectric converting body, a rear-end ring, and a connecting member. By following a design principle of constraints in the parameter relationships between the piezoelectric converting body and the horn in the transducer, a transducer having both appropriate gain and stable performance can be achieved.
Claims14
An ultrasonic scalpel transducer comprising,
- from distal end to proximal end, a connecting feature, a fixing feature, a horn, a piezoelectric converting body, a rear-end ring, and a connecting member,
- wherein a total length of the piezoelectric converting body Ld meets the following constraints:
- with respect to an operating frequency of the transducer, a wavelength in the piezoelectric converting body is λ;
- the horn has first and second amplification steps;
- at the amplification steps, diameters of the horn are Db1 at a proximal end portion, Df1 at a first step section, Db2 at a middle portion, and Df2 at a distal end portion, wherein equations (1) and (2) are defined by:
- Ld
- λ
- =
- 1
- 25
- ×
- (
- Db
-
-
- 1
- Df
-
-
- 1
- ×
- Db
-
-
- 2
- Df
-
-
- 2
- )
- 2
- -
- 1
- /
- 5
- (
- 1
- )
- 2
- <
- Db
-
-
- 1
- Df
-
-
- 1
- ×
- Db
-
-
- 2
- Df
-
-
- 2
- <
- 4
- ;
- (
- 2
- )
- Df2 and Dbl are determined, Df1 and Db2 are selected according to equation (2), then Ld is calculated according to equation (1) and λ;
- wherein the Ld is within 10% of the calculated Ld.
62 more elements
Dependencies are inferred from the claim text.