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CN-224231860-U - Device for detecting impedance of ultrasonic knife and ultrasonic knife impedance detection system

CN224231860UCN 224231860 UCN224231860 UCN 224231860UCN-224231860-U

Abstract

A device for detecting impedance of an ultrasonic knife and an ultrasonic knife impedance detection system belong to the field of medical appliances, a transducer comprises a first connector, a second connector and a flexible lead for connecting the first connector and the second connector, the first connector comprises a piezoelectric component, a first shell and a second shell which are detachably connected, the piezoelectric component is arranged in the first shell and the second shell, the flexible lead penetrates through the first shell and is connected with one end of the piezoelectric component, the other end of the piezoelectric component is provided with the limit ring matched with the second shell and the cutter body connecting rod extending out of the front end of the second shell, and the cutter body connecting sleeve is arranged at the front end of the second shell.

Inventors

  • LI BO
  • CHEN TENG
  • YI SAI
  • YANG JIAMING

Assignees

  • 湖南思捷泰克医疗科技有限公司

Dates

Publication Date
20260512
Application Date
20250523

Claims (8)

  1. 1. The device for detecting the impedance of the ultrasonic knife comprises a first connector (1), a second connector (2) and a flexible lead (3) used for connecting the first connector (1) and the second connector (2), wherein the first connector (1) comprises a piezoelectric component (11) and a first shell (12) and a second shell (13) which are detachably connected, the piezoelectric component (11) is arranged in the first shell (12) and the second shell (13), and the flexible lead (3) penetrates through the first shell (12) to be connected with one end of the piezoelectric component (11), and is characterized in that a limit ring (14) matched with the second shell (13) and a knife connecting rod (15) extending from the front end of the second shell (13) are arranged at the other end of the piezoelectric component (11), and a knife connecting sleeve (16) is arranged at the front end of the second shell (13).
  2. 2. An apparatus for detecting impedance of an ultrasonic blade according to claim 1, wherein the second connector (2) comprises a third housing (21) and a fourth housing (22) which are detachably connected, a conductive pin (23) is provided in the third housing (21), the flexible wire (3) passes through the third housing (21) to be connected with the conductive pin (23), and the fourth housing (22) is used for sealing the third housing (21).
  3. 3. A device for detecting the impedance of an ultrasonic blade according to claim 2, wherein the number of the conductive pins (23) is two, and two conductive wires are arranged in the flexible lead (3).
  4. 4. A device for detecting the impedance of an ultrasonic blade according to claim 1, wherein the first housing (12) is an interference fit with the second housing (13).
  5. 5. An apparatus for detecting the impedance of an ultrasonic blade according to claim 1, characterized in that the flexible wire (3) is provided with a flexible sheath (17) through the end of the first housing (12).
  6. 6. The device for detecting the impedance of the ultrasonic blade according to any one of claims 1 to 5, wherein the piezoelectric assembly (11) comprises a cover plate (111), a piezoelectric crystal stack (112), a first contraction section (113) and a first connection section (114) which are sequentially connected, and a limit ring (14) and a blade body connecting rod (15) are arranged at the end part of the first connection section (114).
  7. 7. The device for detecting the impedance of an ultrasonic blade according to claim 6, wherein the blade body connecting rod (15) comprises a second contraction section (151), a second connecting section (152) and a blade body connecting screw (153) which are sequentially connected.
  8. 8. An ultrasonic knife impedance detection system comprises an impedance detector (4) and the device for detecting ultrasonic knife impedance according to any one of claims 1-7, wherein the first connector (1) is connected with an ultrasonic knife body (5), and the second connector (2) is connected with the impedance detector (4).

Description

Device for detecting impedance of ultrasonic knife and ultrasonic knife impedance detection system Technical Field The utility model relates to the technical field of medical equipment, in particular to a device for detecting ultrasonic knife impedance and an ultrasonic knife impedance detection system. Background The ultrasonic knife converts electric energy into mechanical vibration and mechanical energy by utilizing the piezoelectric effect of piezoelectric ceramics, the energy is transmitted to the knife tip, the tip part is contacted and rubbed with tissues, and cells are separated and coagulated under the cell cavitation principle, so that the effect of cutting hemostasis is achieved. The prior ultrasonic knife cannot realize vibration per se, the transducer and the host computer are required to be connected, the transducer mainly comprises piezoelectric ceramics, the electric energy of the host computer is converted into mechanical energy to be transmitted to the ultrasonic knife, when the prior transducer is required to be used for practical application, the transducer comprises a feedback component (copper ring) connected with a control button of the ultrasonic knife, an operator operates the button of the ultrasonic knife, the chip in the transducer receives a mechanical signal of the feedback component, and the signal is transmitted to the host computer through a feedback circuit, so that the ultrasonic knife is controlled and regulated. However, when the ultrasonic knife leaves the factory, impedance detection is needed to ensure that the national standard is met, the impedance detection is realized by adopting the existing transducer to connect an impedance analyzer and the ultrasonic knife, the impedance value detected by the impedance analyzer is the sum of the impedance of the transducer and the impedance of the ultrasonic knife, the impedance of the transducer interferes with the detection result of the impedance of the ultrasonic knife, the detection result exceeds the national standard, the impedance value of the transducer is higher in the prior market, and the method for reducing the impedance value of the connecting piece of the transducer and improving the impedance detection precision of the ultrasonic knife has great significance. Disclosure of utility model The utility model aims to solve the technical problems of overcoming the defects of the prior art and providing a device for detecting the impedance of an ultrasonic knife with low impedance and high detection precision and a detection system for detecting the impedance of the ultrasonic knife, which is composed of the device. The device for detecting the impedance of the ultrasonic knife comprises a first connector, a second connector and a flexible wire for connecting the first connector and the second connector, wherein the first connector comprises a piezoelectric component, a first shell and a second shell which are detachably connected, the piezoelectric component is arranged in the first shell and the second shell, the flexible wire penetrates through the first shell to be connected with one end of the piezoelectric component, a limit ring matched with the second shell and a knife connecting rod extending out of the front end of the second shell are arranged at the other end of the piezoelectric component, a knife connecting sleeve is arranged at the front end of the second shell, the first connector is simple in internal structure and low in impedance, and only comprises the piezoelectric component capable of generating a piezoelectric effect, the limit ring and the knife connecting rod. Further, the second connector comprises a third shell and a fourth shell which are detachably connected, a conductive contact pin is arranged in the third shell, the flexible wire penetrates through the third shell to be connected with the conductive contact pin, and the fourth shell is used for sealing the third shell, has no redundant structure and reduces impedance. Further, the number of the conductive pins is two, two conductive wires are arranged in the flexible lead, and the conductive wires are a zero wire and a fire wire respectively, so that impedance is reduced. Further, the first housing is interference fit with the second housing. Further, the end portion of the flexible wire penetrating through the first shell is provided with a flexible sleeve, and the flexible wire is prevented from being broken. Further, the piezoelectric assembly comprises a cover plate, a piezoelectric crystal stack, a first contraction section and a first connection section which are sequentially connected, a limit ring and a cutter body connecting rod are arranged at the end part of the first connection section, the cover plate is equal to the piezoelectric crystal stack in diameter, the heat conduction effect is ensured, the diameter of the first contraction section is gradually reduced from the piezoelectric crystal stack section, the first connect