Control housing for disposable patch

A control unit, comprising:

• a carrier configured to be attached to a subject, the carrier including:
• a first planar surface;
• a connector protruding from the first planar surface, and
• a circular electrical contact portion formed on the first planar surface and surrounding the connector;
• and
• a housing configured to contain at least one processing device and a circuit electrically coupled to the at least one processing device, for releasably connecting to the carrier via a mechanical connection in a center portion of the housing, the housing including:
• a second planar surface facing the first planar surface of the carrier;
• a recess disposed on the second planar surface and configured to receive the connector of the carrier;
• and
• a pair of electrical contacts on the second planar surface of the housing distinct from the center portion, the pair of electrical contacts being separated from each other and electrically coupled to the circuit, and the pair of electrical contacts being disposed equidistant from a center of the recess at a distance equal to a radius of the circular electrical contact portion on the first planar surface of the carrier,
• wherein, when the housing is connected to the carrier via the mechanical connection, both of the electrical contacts in the pair of electrical contacts electrically contact the circular electrical contact portion exposed on the first planar surface of the carrier.

A control unit for attachment to a subject, the control unit comprising:

• a carrier configured to be attached to the subject, the carrier including:
• a first planar surface;
• a connector protruding from the first planar surface, and
• a circular electrical contact portion formed on the first planar surface and surrounding the connector;
• and
• a housing configured to contain at least one processing device and a circuit electrically coupled to the at least one processing device, for releasably connecting to the carrier via a mechanical connection, the housing including:
• a second planar surface facing the first planar surface of the carrier;
• a recess disposed on the second planar surface and configured to receive the connector of the carrier;
• and
• a pair of electrical contacts exposed on the second planar surface of the housing distinct from the mechanical connection, the pair of electrical contacts being separated from each other and electrically coupled to the circuit, and the pair of electrical contacts being disposed equidistant from a center of the recess at a distance equal to a radius of the circular electrical contact portion on the first planar surface of the carrier,
• wherein, when the housing is connected to the carrier via the mechanical connection, both of the electrical contacts in the pair of electrical contacts electrically contact the circular electrical contact portion on the first planar surface of the carrier.