Patent ID: 11897720
Assignee: nan
Field: Other special machines (Mechanical engineering)
Classification: CPC B | IPC B

Claim 18:
19. The filament spool dry box of claim 18, wherein the first shell portion further comprises a first outer combining portion protruding from an outer periphery of the first shell body, a combining surface of the first inner combining portion protrudes more than a combining surface of the first outer combining portion, the second shell portion further comprises a second outer combining portion protruding from an outer periphery of the second shell body, a combining surface of the second inner combining portion protrudes more than a combining surface of the second outer combining portion, the at least one engaging component is configured to engage with the first outer combining portion and the second outer combining portion, and the first shell portion and the second shell portion are deformed by the at least one engaging component to generate a resilient force to drive the first inner combining portion and the second inner combining portion to be combined with each other.