Device for detecting impedance of ultrasonic knife and ultrasonic knife impedance detection system

Abstract

The utility model discloses a device for detecting the impedance of an ultrasonic knife and an ultrasonic knife impedance detection system, and belongs to the field of medical instruments, a transducer comprises a first connector, a second connector and a flexible wire used for connecting the first connector and the second connector, the first connector comprises a piezoelectric assembly, a first shell and a second shell, and the first shell and the second shell are detachably connected. The piezoelectric assembly 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 assembly, the other end of the piezoelectric assembly is provided with a limiting ring matched with the second shell and a cutter body connecting rod extending out of the front end of the second shell, and the front end of the second shell is provided with a cutter body connecting sleeve. The ultrasonic knife impedance detection device is simple in structure and ingenious in design, and the impedance of the transducer is reduced by optimizing the structure of the transducer, so that the detection impedance is reduced and the false detection rate of the ultrasonic knife is reduced when the ultrasonic knife performs impedance detection.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, and in particular to a device and system for detecting the impedance of an ultrasonic scalpel. Background Technology

[0002] Ultrasonic scalpels utilize the piezoelectric effect of piezoelectric ceramics to convert electrical energy into mechanical vibration energy, which is then transferred to the scalpel tip. The tip comes into contact with and rubs against the tissue, causing the cells to separate and coagulate under the principle of cell cavitation, thus achieving the effect of cutting and stopping bleeding.

[0003] Existing ultrasonic scalpels cannot vibrate on their own and require connection to a transducer and a main unit. The transducer mainly consists of piezoelectric ceramics that convert the electrical energy of the main unit into mechanical energy and transmit it to the ultrasonic scalpel. When existing transducers are to be used in practical applications, they include a feedback component (copper ring) connected to the ultrasonic scalpel control button. By operating the ultrasonic scalpel button, the operator receives the mechanical signal from the feedback component through the chip inside the transducer and transmits the signal to the main unit through the feedback circuit, thereby controlling and adjusting the ultrasonic scalpel.

[0004] However, ultrasonic scalpels require impedance testing during manufacturing to ensure they meet national standards. Currently, impedance testing uses existing transducers connected to an impedance analyzer and the ultrasonic scalpel. The impedance value measured by the impedance analyzer is the sum of the impedances of the transducer and the ultrasonic scalpel. The impedance of the transducer interferes with the impedance test results of the ultrasonic scalpel, leading to test results that exceed national standards. Currently, the impedance values ​​of transducers on the market are generally too high. Therefore, it is of great significance to reduce the impedance value of this connecting component, the transducer, and improve the impedance testing accuracy of the ultrasonic scalpel. Utility Model Content

[0005] The technical problem to be solved by this utility model is to overcome the shortcomings of the prior art and provide a device for detecting the impedance of an ultrasonic scalpel with low impedance and high detection accuracy, as well as a detection system for detecting the impedance of an ultrasonic scalpel composed of the device.

[0006] The technical solution adopted by this utility model to solve its technical problem is: a device for detecting the impedance of an ultrasonic scalpel, including a first connector, a second connector, and a flexible wire for connecting the first connector and the second connector. The first connector includes a piezoelectric component and a detachably connected first housing and a second housing. The piezoelectric component is disposed inside the first housing and the second housing. The flexible wire passes through the first housing and is connected to one end of the piezoelectric component. The other end of the piezoelectric component is provided with a limiting ring that cooperates with the second housing and a scalpel connecting rod extending from the front end of the second housing. The front end of the second housing is provided with a scalpel connecting sleeve. The internal structure of the first connector is simple, including only a piezoelectric component that can generate a piezoelectric effect, a limiting ring, and a scalpel connecting rod. It has low impedance and can effectively reduce the detection value and reduce the false detection rate of the ultrasonic scalpel when used for factory testing of ultrasonic scalpels.

[0007] Furthermore, the second connector includes a detachably connected third housing and a fourth housing. The third housing contains a conductive pin, and the flexible wire passes through the third housing and connects to the conductive pin. The fourth housing is used to seal the third housing, with no redundant structure, thus reducing impedance.

[0008] Furthermore, the number of conductive pins is two, and the flexible conductor contains two conductive wires, which are a neutral wire and a live wire, respectively, to reduce impedance.

[0009] Furthermore, the first housing and the second housing are interference-fitted.

[0010] Furthermore, a flexible sleeve is provided at the end of the flexible wire that passes through the first housing to prevent the flexible wire from breaking.

[0011] Furthermore, the piezoelectric assembly includes a cover plate, a piezoelectric crystal stack, a first contraction section, and a first connecting section connected in sequence. The end of the first connecting section is provided with a limiting ring and a blade connecting rod. The diameter of the cover plate is equal to that of the piezoelectric crystal stack to ensure heat conduction. The diameter of the first contraction section gradually decreases from the piezoelectric crystal stack section to ensure that the first connecting section has a certain space in the housing, thereby reducing the volume of the connecting section, reducing impedance, and improving heat dissipation.

[0012] Furthermore, the blade connecting rod includes a second contraction section, a second connecting section, and a blade connecting screw connected in sequence. The second contraction section is used to reduce the volume of the second connecting section and reduce the resistance.

[0013] An ultrasonic scalpel impedance detection system includes an impedance detector, an ultrasonic scalpel body, and a device for detecting the impedance of the ultrasonic scalpel. The first connector is connected to the ultrasonic scalpel body, and the second connector is connected to the impedance detector.

[0014] The beneficial effects of this utility model are: This utility model has a simple structure and ingenious design. By optimizing the structure of conventional transducers and reducing the impedance of transducers, it reduces interference factors in impedance detection during ultrasonic scalpel impedance detection, improves detection accuracy, and reduces the false detection rate of ultrasonic scalpel. Attached Figure Description

[0015] Figure 1 —A perspective view of the transducer of this utility model;

[0016] Figure 2 —Exploded view of the transducer of this utility model;

[0017] Figure 3 —Diagram of the piezoelectric component of this utility model;

[0018] Figure 4 —Diagram of the impedance detection system of this utility model;

[0019] In the diagram: 1-First connector, 11-Piezoelectric assembly, 111-Cover plate, 112-Piezoelectric crystal stack, 113-First contraction section, 114-First connecting section, 12-First housing, 13-Second housing, 14-Limiting ring, 15-Scalpel body connecting rod, 151-Second contraction section, 152-Second connecting section, 153-Scalpel body connecting screw, 16-Scalpel body connecting sleeve, 17-Flexible sleeve, 2-Second connector, 21-Third housing, 22-Fourth housing, 23-Conductive pin, 3-Flexible wire, 4-Impedance detector, 5-Ultrasonic scalpel body. Detailed Implementation

[0020] Reference Figures 1-3 This embodiment provides a device for detecting the impedance of an ultrasonic scalpel, including a first connector 1, a second connector 2, and a flexible wire 3 for connecting the first connector 1 and the second connector 2. The first connector 1 includes a piezoelectric component 11 and a first housing 12 and a second housing 13 that are detachably connected. The piezoelectric component 11 is disposed inside the first housing 12 and the second housing 13. The flexible wire 3 passes through the first housing 12 and is connected to one end of the piezoelectric component 11. The other end of the piezoelectric component 11 is provided with a limiting ring 14 that cooperates with the second housing 13 and a scalpel connecting rod 15 that extends from the front end of the second housing 13. The front end of the second housing 13 is provided with a scalpel connecting sleeve 16.

[0021] Both the first housing 12 and the second housing 13 are cylindrical structures and both have a diameter-reducing section. The diameter-reducing section of the first housing 12 is located at the end of the first housing 12, through which the flexible wire 3 passes. The diameter-reducing end allows for a smooth transition between the flexible wire 3 and the first housing 12. The diameter-reducing section of the second housing 13 is located in the middle and is used to form a limit with the limiting ring 14 of the piezoelectric component 11. A flexible sleeve 17 is provided at the end of the flexible wire 3 that passes through the first housing 12 to prevent the flexible wire 3 from breaking.

[0022] The second connector 2 includes a detachably connected third housing 21 and a fourth housing 22. The third housing 21 is provided with a detachable conductive pin 23. The flexible wire 3 passes through the third housing 21 and is connected to the conductive pin 23. The fourth housing 22 is used to seal the third housing 21. There are two conductive pins 23. The flexible wire 3 is provided with two conductive wires, which are a neutral wire and a live wire. The third housing 21 is provided with a pressing part for easy insertion and removal.

[0023] The first housing 12 and the second housing 13 are interference-fitted. In other embodiments, the first housing 12 and the second housing 13 may also be threaded.

[0024] The piezoelectric assembly 11 includes a cover plate 111, a piezoelectric crystal stack 112, a first contraction section 113, and a first connecting section 114 connected in sequence. The first connecting section 114 is provided with a limiting ring 14 and a blade connecting rod 15 at its end. The cover plate 111 has the same diameter as the piezoelectric crystal stack 112 to ensure heat conduction. The diameter of the first contraction section 113 gradually decreases from the piezoelectric crystal stack 112 to ensure that the first connecting section 114 has a certain space in the housing, thereby reducing the volume of the connecting section, reducing impedance, and improving heat dissipation.

[0025] The blade connecting rod 15 includes a second contraction section 151, a second connecting section 152, and a blade connecting screw 153 connected in sequence. The second contraction section 151 is used to reduce the volume of the second connecting section 152 and reduce the resistance.

[0026] The transducer in this embodiment has a simple structure and low impedance. It omits the feedback component (copper ring), built-in chip, feedback circuit, and chip power supply circuit found in existing transducers. The feedback component is connected to the ultrasonic scalpel control buttons on the transducer, such as the power switch and gear buttons. When the operator presses the corresponding button, the feedback component transmits the corresponding mechanical signal to the chip, which converts it into an electrical signal and transmits it to the host through the feedback circuit. Therefore, the transducer in this embodiment cleverly eliminates the above-mentioned components to reduce the transducer's impedance and avoid false detection by the ultrasonic scalpel.

[0027] Reference Figure 4 An ultrasonic scalpel impedance detection system according to this embodiment includes an impedance detector 4, an ultrasonic scalpel body 5, and a device for detecting the impedance of an ultrasonic scalpel as described above. A first connector 1 is connected to the ultrasonic scalpel body 5, and a second connector 2 is connected to the impedance detector 4.

[0028] The method of using this utility model is as follows: connect the impedance detector 4, the transducer and the ultrasonic scalpel body 5 to be tested in sequence, and turn on the detector to complete the test.

[0029] The ultrasonic scalpel impedance detection system of this application and the conventional transducer (such as Enochon) used for impedance value detection of a certain ultrasonic scalpel have impedance values ​​of 35Ω and 46Ω, respectively. As can be seen from the above detection values, the conventional transducer generates a large impedance interference signal during ultrasonic scalpel impedance detection. Using the ultrasonic scalpel impedance detection system of this application, the impedance detection value is reduced by more than 10Ω, which can significantly reduce the impedance generated by the transducer as a connecting component during ultrasonic scalpel impedance detection, thereby significantly improving the detection accuracy. Although embodiments of this utility model have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this utility model. Those skilled in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of this utility model.

Claims

1. A device for detecting the impedance of an ultrasonic scalpel, comprising a first connector (1), a second connector (2), and a flexible wire (3) for connecting the first connector (1) and the second connector (2), wherein the first connector (1) comprises a piezoelectric assembly (11) and a detachably connected first housing (12) and second housing (13), the piezoelectric assembly (11) being disposed within the first housing (12) and the second housing (13), and the flexible wire (3) passing through the first housing (12) and connected to one end of the piezoelectric assembly (11), characterized in that: The other end of the piezoelectric assembly (11) is provided with a limiting ring (14) that cooperates with the second housing (13) and a blade connecting rod (15) that extends from the front end of the second housing (13). The front end of the second housing (13) is provided with a blade connecting sleeve (16).

2. The device for detecting the impedance of an ultrasonic scalpel according to claim 1, characterized in that: The second connector (2) includes a detachably connected third housing (21) and a fourth housing (22). The third housing (21) is provided with a conductive pin (23). The flexible wire (3) passes through the third housing (21) and is connected to the conductive pin (23). The fourth housing (22) is used to seal the third housing (21).

3. The device for detecting the impedance of an ultrasonic scalpel according to claim 2, characterized in that: The number of conductive pins (23) is two, and the flexible conductor (3) has two conductive wires inside.

4. The device for detecting the impedance of an ultrasonic scalpel according to claim 1, characterized in that: The first housing (12) and the second housing (13) are interference fit.

5. The device for detecting the impedance of an ultrasonic scalpel according to claim 1, characterized in that: The flexible wire (3) has a flexible sleeve (17) at the end that passes through the first housing (12).

6. A device for detecting the impedance of an ultrasonic scalpel according to any one of claims 1 to 5, characterized in that: The piezoelectric assembly (11) includes a cover plate (111), a piezoelectric crystal stack (112), a first contraction section (113), and a first connecting section (114) connected in sequence. The end of the first connecting section (114) is provided with a limiting ring (14) and a blade connecting rod (15).

7. The device for detecting the impedance of an ultrasonic scalpel according to claim 6, characterized in that: The blade connecting rod (15) includes a second contraction section (151), a second connecting section (152), and a blade connecting screw (153) connected in sequence.

8. An ultrasonic scalpel impedance detection system, comprising an impedance detector (4) and a device for detecting the impedance of an ultrasonic scalpel as described in any one of claims 1 to 7, wherein the first connector (1) is connected to the ultrasonic scalpel body (5) and the second connector (2) is connected to the impedance detector (4).

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