Modular functional band links for wearable devices

A band system for a wearable device, comprising:

• a wearable device;
• and
• multiple modular functional band links that electrically and mechanically connect to at least one of the wearable device or another of the multiple modular functional band links;
• wherein:
• the multiple modular functional band links each include an input component and the wearable device receives input indications from the multiple modular functional band links and performs an action based on a pattern in which the input indications were detected by the respective modular functional band links;
• or
• the multiple modular functional band links each include an output component and the wearable device determines to provide an output pattern using the multiple modular functional band links and signals the multiple modular functional band links according to the pattern.

A band for a wearable device, comprising:

• multiple modular functional band links that each include an electronic component and:
• at least a first one of the multiple modular functional band links electrically and mechanically connects to a wearable device;
• and
• at least a second one of the multiple modular functional band links electrically and mechanically connects to another of the multiple modular functional band links;
• wherein:
• the first one of the modular functional band links electrically connects to the wearable device or the second one of the modular functional band links electrically connects to the other of the multiple modular functional band links via:
• conductive portions of a groove that contact conductive portions of a tongue that is inserted into the groove;
• the conductive portions of the groove and the conductive portions of the tongue allow rotation with respect to each other;
• and
• the conductive portions of the groove and the conductive portions of the tongue maintain electrical connection during the rotation.