The ornamental design for an earphone, as shown and described.
FIG. 1 is a front and top perspective view of an earphone, showing our new design;
FIG. 2 is a rear and bottom perspective view thereof;
FIG. 3 is a front elevational view thereof;
FIG. 4 is a rear elevational view thereof;
FIG. 5 is a left side elevational view thereof,
FIG. 6 is a right side elevational view thereof;
FIG. 7 is a top plan view thereof;
FIG. 8 is a bottom plan view thereof;
FIG. 9 is an enlarged view of a portion indicated with numeric 9 in FIG. 1;
FIG. 10 is an enlarged view of a portion indicated with numeric 10 in FIG. 1; and,
FIG. 11 is an enlarged view of a portion indicated with numeric 11 in FIG. 5.
The broken lines in the figures illustrate portions of the earphone that form no part of the claimed design. The break in the cable shown in broken lines in the drawings are included to show a symbolic break in length of the Connector. The appearance of any portion of the earphone between the break lines forms no part of the claimed design. The dash-dot-dash lines shown in FIGS. 1 and 5 and illustrated in enlarged views in FIGS. 9, 10 and 11 form no part of the claimed design.