(57) With a shifting mechanism spikes in the shoe sole are shifted either into a passive
position, where the spikes are substantially completely inside the sole of the shoe,
or into an active position, where part of the spike is protruding from the sole of
the shoe. The function of the shifting mechanism is controlled with a magnetically
activated throw-over switch (16) and an activation magnet (30) of the throw-over switch.
The shoe user activates the shifting mechanism by bringing the activation magnet close
to the throw-over switch. The throw-over switch can be in the heel part of the sole
of the shoe and the activation magnet can be in the toe part of the sole of the shoe.
The shifting mechanisms of the shoes are thus activated by bringing the toe of the
left foot next to the heel part of the right foot and by bringing the toe of the right
foot next to the heel part of the left foot. When activated, the shifting mechanism
changes the position of the spikes from active to passive or vice versa. The shifting
mechanism may comprise an electric motor (10) or an electrically functioning hydraulic
or pneumatic pump, whereby the throw-over switch is used for controlling the function
of the above-mentioned motor or pump. The shoe may have a power source, such as a
chargeable battery (14) and means for receiving charging current for the battery.
The above-mentioned means may comprise a receiving coil (18) in the shoe, into which
charging current for the battery can be produced with a transmitting coil placed beside
the shoe.
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