Two metal shaft connection structure

Abstract

The invention discloses a double-metal-shaft connecting structure in the field of earphone parts. The structure comprises a metal rotating shaft A, a metal rotating shaft B and a plastic fixing block, wherein a sleeving rotating shaft extending forwards is arranged in the center of one end of the metal rotating shaft A, an annular groove and a first annular clamp groove are formed in the outer surface of the sleeving rotating shaft; a hollow casing pipe is arranged at one end of the metal rotating shaft B; and a second annular clamp groove is formed in the inner surface of the hollow casing pipe. With the adoption of the scheme of metal-plastic-metal, the conventional mode that the two metal shafts are connected through a positioning dowel or a clamp spring is broken through, the service life can be prolonged, the assembly structure is simple, the product assembly difficulty can be greatly reduced through deformable structure fastening, meanwhile, the requirement for processing accuracy of each part is lower, and the defects of assembly difficulty, poor assembly and the like due to processing errors can be overcome.

Description

technical field [0001] The invention relates to the field of earphone spare parts, in particular to a structure connecting two shafts, in particular to a connecting structure of two metal shafts. Background technique [0002] The common structure of the metal two-axis connection of the rotating part of the traditional earphone is as follows: [0003] A) if figure 1 As shown, it includes A001 on the rotating shaft, A002 on the lower rotating shaft and a pin A003 for connecting the two rotating shafts. The pin A003 is installed through the corresponding pin hole. The two metal shaft assemblies are connected by pinning. Its disadvantages: there are pin holes in the appearance and the pins may fall off when the shaft is rotating, causing the two metal shafts to separate. [0004] B) if figure 2 As shown, it includes B001 on the rotating shaft, B002 on the lower rotating shaft and a snap ring B003 for connecting the two rotating shafts. The two metal shaft assemblies are co...

AI Technical Summary

Problems solved by technology

Its disadvantages: there are pin holes in the appearance and the pins may fall off when the shaft rotates, causing the two metal shafts to separate

Although there is no hole in the appearance, the friction is obvious when the shaft rotates, and it is easy to wear and cause the two shafts to loosen

[0005] Although the above two structures can connect two metals together, the principle is to use the "metal-to-metal" friction method, which cannot withstand the rotation life test. After a period of use, it will shake a lot and have disadvantages such as poor hand feeling.

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