Bonding Wire Spool Structure for Stable Unwinding Under Vibration

The spool case is segmented into an upper spool case and a lower spool case with distinct functions. The upper spool case has a first winding surface for receiving bonding wires in a loose state, while the lower spool case has a second winding surface for tight winding. This segmentation allows the wire winding process to be divided into two stages: initial loose winding to avoid tangling, followed by tight winding for compact storage, thereby resolving the contradiction between manufacturing precision and wire entanglement.

The upper spool case performs preliminary action by receiving and pre-winding the bonding wires in a loose manner before the final tight winding operation. This preliminary loose winding stage prepares the wires in an organized state, preventing tangling and entanglement during subsequent handling and final winding, thus improving manufacturing precision without causing wire damage.

The winding process is segmented into two distinct phases performed by separate spool case portions: loose winding in the upper spool case that preserves wire flexibility and strength, and tight winding in the lower spool case that maximizes space utilization. This segmentation allows the wire to be tightly stored without compromising its integrity during unwinding, as the loose initial winding prevents excessive stress concentration.

Different regions of the spool case provide different winding qualities: the upper spool case provides a loose winding environment that maintains wire strength and flexibility, while the lower spool case provides a tight winding environment for compact storage. This local quality differentiation resolves the contradiction between volume utilization and wire integrity by applying appropriate winding tension in different locations.

The spool case is divided into functionally distinct upper and lower sections, each with specific winding surfaces and characteristics. This segmentation enables precise control over wire winding in two stages: initial loose winding for tangling prevention and final tight winding for compact storage. The segmented structure achieves superior wire winding control while maintaining relatively simple overall device complexity, as each segment performs a specialized function.

The dual-spool case structure provides multi-functionality: the upper spool case handles preliminary loose winding and wire organization, while the lower spool case handles final tight winding and storage. This multi-functional design resolves the contradiction between device complexity and winding control precision by integrating multiple functions into a unified spool case assembly that works together seamlessly.