Patent ID: 11911062
Assignee: INNOLCON MEDICAL TECHNOLOGY (SUZHOU) CO., LTD.
Field: Medical technology (Instruments)
Classification: CPC A  B  H | IPC A  B  H

Claim 0:
1. 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.