Switching heart

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  • Pressure switch part with switching heart (highlighted by a rectangular frame)

  • Switch heart, enlarged and redrawn; Switching steps 1 to 4; red = OFF, green = ON

The switching heart is part of a mechanical component in a latching electrical pressure switch . It is a ring-shaped, closed groove , the "island" of which is shaped like a heart, and in which a pin slides in a circle in four stages when the switch is operated.

After releasing the switch button that has been pressed in against spring force (1st step), it moves back a short distance (2nd step) until the switch pin hits a stop in the switch heart. The switch is in the engaged position. When you press the switch button again (3rd step), the latching is canceled by moving the switch pin slightly to the side from the stop in the switch heart to the other side. If the switch button is now released again, it moves (4th step) back to its starting position by spring force. The switch pin has then completed one cycle in the switch heart. The pressure switch is in the off position again.

The two adjacent pictures show a push-button (not shown) that can be moved downwards and is connected to the sliding part, on the middle of which the downward-pointing nose is fitted with the switching heart. The two outer lugs each actuate an electrical switching element (not shown). The switch pin that engages in the switch heart is located in the switch housing , from which it is pressed vertically into the switch heart with spring force. It is also guided transversely in the housing so that it can move in both vertical paths of the switching heart. The end positions of the four steps of the switch pin are shown schematically in the right picture. The two colored positions are OFF (red) and ON (green). In each of the four steps the pen passes a step leading into the depth (step edge shown as a blue line). The back walls of the steps ensure that the pen cannot move back in the respective subsequent step, but rather runs its circular closed path forwards. Especially the inner part (shown dotted) of the pen track has the eponymous heart shape. The "descent" over the four steps is compensated by the fact that the long parts of the pen track rise slightly between the steps.

Individual evidence

  1. ↑ Electrical switch: German patent DE102012001985.
  2. ↑ Switch: German patent DE4409456.