\begin{tikzpicture}[baseline, xscale=.5]
    \draw (0,-.5)--(0,.5);
    \draw (1,-.5) -- (1,.5);
    \draw (2,-.5) -- (2,.5);
    \draw (3,.5) -- (4,-.5);
    \node at (3.5,0) (center) {};
    \draw (3,-.5) -- (center.-120);
    \draw (center.60) -- (4,.5);
    \draw (5,-.5)--(5,.5);
    \draw (6,-.5) -- (6,.5);
\end{tikzpicture}