## 4 Detailed Design of the Conductive Center Pole Based on the Innovative Design Method
### Optimized Design of the Conductive Center Pole  
According to the design of the conductive center pole in Figure 15, the design of the conductive center pole can meet the basic installation and conductivity requirements. However, its \"independence\", \"functionality\" and \"installation and assembly\" still need to be improved. In terms of \"installation and assembly\", a spring mechanism has been added, and an elastic force field has been introduced, which can solve the situation of insufficient or excessive contact of the conductive module. However, the internal space requirement for the center pole has increased, and the increased spring mechanism reduces the overall assemblability. In terms of \"independence\" and \"functionality\", although the electrode alignment and contact of the conductive module are not affected by the rotational angle of the center pole and the thread length, this structure has high requirements for the relative position between the two electrodes. Because the two electrodes are on the same conductive module, if one electrode comes into contact earlier than the other electrode, the first electrode in contact will push the conductive module to squeeze the spring, causing the conductive module to move as a whole, while the other electrode will not contact. The contact of the electrodes will form mutual interference. As shown in Figure 16.  
In order to solve the problem of mutual interference of electrode contact, it is necessary for the two electrodes to have the ability to move and adjust independently, but the conductive module belongs to a hole with a fixed shape, and there is a physical conflict here. The division principle in the invention principle in Table 2. can be used to divide the electrodes so that they can be aligned and contacted, respectively. The preliminary segmentation is shown in Figure 17.  
Figure 15: Conductive center pole. To optimize the \"overall assemblability.\" of the conductive module, it is necessary to simplify the shape of the spring and the conductive module to reduce the difficulty of assembly and avoid interference with the center pole. However, the internal complexity of the corresponding system will increase, and its manufacturability will also deteriorate. In engineering design, one design parameter of the system is improved, while another parameter is aggravated, that is, technical conflict [30; 31]. To solve the technical conflict, it is necessary to transform the actual problem into the conflict problem model. The relationship between the technical parameters and the invention principle is found through the conflict matrix table, and the final solution is obtained according to the invention principle. Using the technical conflict resolution theory, the corresponding technical parameters and invention principles in the classic conflict matrix were found, as shown in Table 3.  
Figure 16: Interference of electrode position. Figure 17: Structural separation of the conductive modules. \begin{table}
\begin{tabular}{c c c} \hline \hline
**Optimized Parameters** & **Deteriorating Parameters** & **Invention Principles** \\ \hline Shape (9) & Manufacturability (32) & 01,32,17,28 \\  & System complexity (36) & 16,29,01,28 \\ \hline \hline \end{tabular}
\end{table} 
Table 3: Technical conflict matrix of conductive center pole assembly. To simplify the shape of the conductive module, while avoiding the deterioration of its manufacturability and system complexity, inventive principle 1 (segmentation: divide the object into mutually independent, detachable and installable parts) can be used as a solution. This solution integrated the spring structure into the conductive structure to make the overall shape more concise and easy to assemble, while retaining the expansion and contraction function of the spring. Even if the initial segmentation operation is performed, as shown in Figure 17, the relative position of the two electrodes in the axial direction cannot be guaranteed before the central rod is tightened, and they are prone to misalignment.