A connecting structure includes a connecting pin, a pin catch, a biasing member, and a holder. The connecting pin has a first portion, a second portion thicker than the first portion, and a step therebetween and connects a connecting object and a connected object (objects) by being inserted into their insertion holes. The pin catch moves in a recess in one of the objects in moving directions that are not an extending direction of the insertion holes and has a pin engagement portion that engages the step. The biasing member biases the pin catch in one of the moving directions. The holder is on the one of the objects and transitions, in response to user operation, to a first state where the holder and the biasing member holds the pin catch or a second state where the pin catch is detachable from the recess.

A connecting structure includes a connecting pin, a pin catch, a biasing member, and a holder. The connecting pin has a first portion, a second portion thicker than the first portion, and a step therebetween and connects a connecting object and a connected object (objects) by being inserted into their insertion holes. The pin catch moves in a recess in one of the objects in moving directions that are not an extending direction of the insertion holes and has a pin engagement portion that engages the step. The biasing member biases the pin catch in one of the moving directions. The holder is on the one of the objects and transitions, in response to user operation, to a first state where the holder and the biasing member holds the pin catch or a second state where the pin catch is detachable from the recess.

A coupling pin and a wearable electronic device in which the coupling pin is configured to connect a wearable member to a housing of the wearable electronic device are provided. The coupling pin includes a tube portion which is configured to be accommodated in the wearable member, and which at least partially has electrical conductivity, a core portion which is configured to protrude from at least one of both ends of the tube portion to be bound to the housing, and which at least partially has electrical conductivity, and a sleeve which is arranged adjacent to the tube portion while surrounding at least a portion of the core portion, and which has electrical conductivity, wherein the sleeve is electrically insulated from the core portion and the tube portion.

A coupling pin and a wearable electronic device in which the coupling pin is configured to connect a wearable member to a housing of the wearable electronic device are provided. The coupling pin includes a tube portion which is configured to be accommodated in the wearable member, and which at least partially has electrical conductivity, a core portion which is configured to protrude from at least one of both ends of the tube portion to be bound to the housing, and which at least partially has electrical conductivity, and a sleeve which is arranged adjacent to the tube portion while surrounding at least a portion of the core portion, and which has electrical conductivity, wherein the sleeve is electrically insulated from the core portion and the tube portion.

An arm-wearable device includes: a cylindrical case body extending in a first direction; a frame member disposed at one side in the first direction of the case body; and an exterior member disposed at the one side of the frame member. The case body and the exterior member are fixed by a fixing member. At least part of the frame member is held between the case body and the exterior member, so that the frame member is fixed.

An arm-wearable device includes: a cylindrical case body extending in a first direction; a frame member disposed at one side in the first direction of the case body; and an exterior member disposed at the one side of the frame member. The case body and the exterior member are fixed by a fixing member. At least part of the frame member is held between the case body and the exterior member, so that the frame member is fixed.