EP-4265205-B1 - SCALPEL ROD ASSEMBLY OF ULTRASONIC SCALPEL

Inventors

• ZHANG, WENLIANG
• Wu, Xianglu
• MA, Jizhen
• CHEN, QIAN
• YU, Jianjiao

Dates

Publication Date

20260506

Application Date

20210818

Claims (10)

1. A scalpel rod assembly of an ultrasonic scalpel, comprising: a scalpel rod (1); an inner tube (2), wherein the inner tube (2) is sleeved outside the scalpel rod (1); and a support ring (3), wherein the support ring (3) comprises a first support body (311), the first support body (311) is provided on an inner wall of the inner tube (2), and a first protrusion (3111) protrudes from the first support body (311) in a direction away from the inner tube (2) and the first protrusion (3111) abuts against the scalpel rod (1); characterised in that the support ring (3) further comprises: a second support body (312), wherein the second support body (312) is provided on an outer wall of the inner tube (2); and a connector (313), wherein a through hole (21) is provided on the inner tube (2), the connector (313) is provided inside the through hole (21), and the connector (313) is connected to the first support body (311) and the second support body (312).
2. The scalpel rod assembly of claim 1, wherein the first support body (311), the connector (313) and the second support body (312) are an integrated structure.
3. The scalpel rod assembly of claim 1, wherein a plurality of through holes (21) are provided, and the plurality of through holes (21) are evenly distributed along a circumferential direction of the inner tube (2).
4. The scalpel rod assembly of claim 2, wherein the support ring (3) is integrally molded on the inner tube (2) by injection molding.
5. The scalpel rod assembly of claim 2, wherein a material of the support ring (3) is silicone rubber.
6. The scalpel rod assembly of claim 1, further comprising an outer tube (4), wherein the outer tube (4) is sleeved outside the inner tube (2), and the second support body (312) is clearance fitted with the outer tube (4).
7. The scalpel rod assembly of claim 1, wherein the first protrusion (3111) is an annular protrusion.
8. The scalpel rod assembly of claim 6, wherein two support rings (3) are provided, the two support rings are a first support ring (31) and a second support ring (32), respectively, the first support ring (31) is provided at a head end of the inner tube (2), and the second support ring (32) is provided at a tail end of the inner tube (2).
9. The scalpel rod assembly of claim 8, wherein at least one of the first support ring (31) or the second support ring (32) is provided with a second protrusion (3121) that is annular, and the second protrusion (3121) is provided on an outer wall of the second support body (312) of at least one of the first support ring (31) or the second support ring (32) and extends in a direction away from the inner tube (2) until the second protrusion (3121) abuts against an inner wall of the outer tube (3).
10. The scalpel rod assembly of claim 1, wherein the scalpel rod (1), the inner tube (2) and the support ring (3) are provided coaxially.

Description

TECHNICAL FIELD The present application relates to the field of medical instruments, for example, to a scalpel rod assembly of an ultrasonic scalpel. BACKGROUND The ultrasonic scalpel has been widely used in clinical surgery due to the advantages of low bleeding, little damage to surrounding tissues, etc. The conventional scalpel rod assembly of the ultrasonic scalpel supports the scalpel rod inside the outer sleeve by means of a support ring provided on the scalpel rod. The support ring is attached to the inner wall of the outer sleeve, and the impedance of the scalpel rod is easily increased so that the scalpel rod may be easily heated up during the working process, affecting the normal use of the scalpel rod assembly. The support ring is integrally molded on the scalpel rod by injection molding, glue is easily spilled during the processing, and the surface of the scalpel rod may be easily scratched in the process of cleaning the spilled glue, resulting in the change in the vibration frequency of the scalpel rod. US5935144A discloses an ultrasonic surgical instrument which is described for use in medical procedures to, for example, dissect or cut living organic tissue. The ultrasonic surgical instrument includes an outer sheath, a waveguide, and an improved acoustic isolation element. The acoustic isolation element is bonded to both the ultrasonic waveguide and the interior surface of the outer sheath, creating an acoustic isolation seal. The improved acoustic isolation element seals the distal end of the ultrasonic instrument, substantially improving its ability to reduce or eliminate penetration by liquids or other contaminants during, for example, soaking or steam autoclave sterilization. WO9837819A1 relates to a single use ultrasonic surgical device 150. The ultrasonic surgical device 150 includes a transmission component 86 adapted to receive ultrasonic vibration from a transducer assembly 82 and to transmit the ultrasonic vibration from a first end to a second end. A hub 172 is coupled to the transmission component and includes a temperature sensitive material that distorts when exposed to heat. The ultrasonic surgical device 150 also includes a transducer assembly 82 adapted to vibrate at an ultrasonic frequency in response to electrical energy. A transmission rod 86 is adapted to receive ultrasonic vibration from the transducer assembly and to transmit the ultrasonic vibration from a first end to a second end of the transmission rod. A sheath 170 surrounds at least a portion of the transmission rod and includes a temperature sensitive material that distorts when exposed to heat. An end effector 88 is adapted to receive the ultrasonic vibration from the transmission rod 86 and to transmit the ultrasonic vibration from a first end to a second end of the end effector. The second end of the end effector is disposed near an antinode and the first end of the end effector coupled to the second end of the transmission rod. In an alternative arrangement, the sterilization of the instrument 550 inhibits the ultrasonic transmission capabilities of the instrument to prevent reuse. SUMMARY The present application provides a scalpel rod assembly of an ultrasonic scalpel to solve the problems of increased impedance and spilled glue caused by the support ring provided on the scalpel rod. The invention is set out in the appended set of claims. The present application provides a scalpel rod assembly of an ultrasonic scalpel. The scalpel rod assembly includes a scalpel rod, an inner tube, and a support ring. The inner tube is sleeved outside the scalpel rod. The support ring includes a first support body. The first support body is provided on the inner wall of the inner tube, and a first protrusion protrudes from the first support body in a direction away from the inner tube until the first protrusion abuts against the scalpel rod. The support ring further includes a second support body and a connector. The second support body is provided on the outer wall of the inner tube. A through hole is provided on the inner tube, the connector is provided inside the through hole, and the connector is connected to the first support body and the second support body. As an optional solution of the scalpel rod assembly, the first support body, the connector and the second support body are an integrated structure. As an optional solution of the scalpel rod assembly, multiple through holes are provided, and the multiple through holes are evenly distributed along the circumferential direction of the inner tube. As an optional solution of the scalpel rod assembly, the support ring is integrally molded on the inner tube by injection molding. As an optional solution of the scalpel rod assembly, the material of the support ring is silicone rubber. As an optional solution of the scalpel rod assembly, the scalpel rod assembly includes an outer tube. The outer tube is sleeved outside the inner tube, and the second support body is clearance