The ornamental design for an electrictoothpickhead, as shown and described.
1. Electric toothpick head
1.1 : Right front perspective view
1.2 : Left rear perspective view
1.3 : Front elevation view
1.4 : Rear elevation view
1.5 : Top plan view
1.6 : Bottom plan view
1.7 : Right elevation view
1.8 : Left elevation view
1.9 : Enlarged partial view
1.10: Enlarged partial view
Fig. 1.9 is an enlarged view of portion 1.9 of fig. 1.1; fig. 1.10 is an enlarged view of portion 1.10 of fig. 1.2; in figs. 1.1 to 1.10, the broken lines of even length depict portions of the electric toothpick head that form no part of the claimed design, the dash-dot lines depict the boundary of the claimed design but form no part thereof, and the long dash-short dash-short dash lines depict boundaries but form no part of the claimed design.