NON-RETURN VALVE FOR A CONNECTING ROD FOR A VARIABLE COMPRESSION OF AN INTERNAL COMBUSTION ENGINE, AND CONNECTING ROD WITH SUCH A NON-RETURN VALVE

The invention relates to a check valve (9, 10) for a connecting rod (1) for variable compression of an internal combustion engine with at least one hydraulic chamber (4, 5), wherein the hydraulic chamber (4, 5) of the connecting rod (1) can be connected to a supply connection or a tank by means of the check valve (9, 10), and wherein the check valve (9, 10) has a valve housing (19) and a valve closure member (20) which is axially displaceable along a valve longitudinal axis (L) between an open and a closed position, which is biased against a valve seat (23) by means of a valve spring (22). According to the invention, a mandrel-shaped guide body (25) is provided, which passes through the valve spring (22) and by means of which the valve spring (22) is guided both in the open position and in the closed position of the valve closure member (20). Furthermore, the invention relates to a connecting rod (1) with at least one check valve (9, 10).