This electronic component can reduce assembly costs and also lighten the load to a connection part, and comprises: an electronic component body; a terminal that extends in a prescribed direction from the electronic component body, and has a retaining unit; and a coil spring that is externally fitted to be in electrical contact with the terminal, and that is retained by the retaining unit, wherein the coil spring is in electrical contact with a printed board in a compressed state. The terminal is fitted loosely in a fitting hole of the printed board, for example. Also, the coil spring comprises an electrically conductive coating, for example.

A power supply device includes at least one magnetic member, a first circuit board and a second circuit board. The first circuit board is disposed over the magnetic member and is electrically connected to the magnetic member. The first circuit board has an opening. The second circuit board is electrically connected to the first circuit board. The second circuit board is disposed over the first circuit board and faces the opening of the first circuit board.

A power supply device includes at least one magnetic member, a first circuit board and a second circuit board. The first circuit board is disposed over the magnetic member and is electrically connected to the magnetic member. The first circuit board has an opening. The second circuit board is electrically connected to the first circuit board. The second circuit board is disposed over the first circuit board and faces the opening of the first circuit board.

In some examples, a tool-less electronic component retention apparatus includes a bracket to affix to a circuit board, and a spring-loaded arm attached to the bracket. The spring-loaded arm has an engagement tab that is angled downwardly to engage an upper surface of an electronic component to mount the electronic component to the circuit board. The spring-loaded arm is pivotable between an engaged position and a release position by a user without use of a tool.

In some examples, a tool-less electronic component retention apparatus includes a bracket to affix to a circuit board, and a spring-loaded arm attached to the bracket. The spring-loaded arm has an engagement tab that is angled downwardly to engage an upper surface of an electronic component to mount the electronic component to the circuit board. The spring-loaded arm is pivotable between an engaged position and a release position by a user without use of a tool.

A fixing structure of an electronic component includes a fixing member configured to fix an electronic component while pressing the electronic component against a wall surface of a housing in a pressing direction; and a fastened portion which is provided at a position away from the wall surface of the housing and to which the fixing member is fastened and fixed. The fixing member includes a fixing portion that is fastened and fixed to the fastened portion, a pressing portion that extends from the fixing portion toward the electronic component and is configured to press the electronic component against the wall surface in the pressing direction, and an engaging portion which is provided at the fixing portion. The fastened portion includes an engaged portion that is engaged with the engaging portion, and is configured to limit movement of the fixing portion in a direction opposite to the pressing direction.

A fixing structure of an electronic component includes a fixing member configured to fix an electronic component while pressing the electronic component against a wall surface of a housing in a pressing direction; and a fastened portion which is provided at a position away from the wall surface of the housing and to which the fixing member is fastened and fixed. The fixing member includes a fixing portion that is fastened and fixed to the fastened portion, a pressing portion that extends from the fixing portion toward the electronic component and is configured to press the electronic component against the wall surface in the pressing direction, and an engaging portion which is provided at the fixing portion. The fastened portion includes an engaged portion that is engaged with the engaging portion, and is configured to limit movement of the fixing portion in a direction opposite to the pressing direction.

Buttons (41A, 41B) have a button moving part (42) disposed in front of a circuit board (51) and allowed to move in a front-back direction, and guided parts (42e) moving in conjunction with the button moving part (42). The buttons (41A, 41B) cause the button moving part (42) to operate a switch (52) of the circuit board (51). Guide parts (21E, 21F) are disposed along the guided parts (42e) and restrict the direction in which the button moving part (42) moves. The guide parts (21E, 21F) and the guided parts (42e) have portions located back of a front surface (51a) of the circuit board (51). This structure effectively prevents the buttons from tilting when they are operated.

A portable wire management ring configured to secure wires. The wire management ring includes an outer housing that has an outer housing base in a ring shape, the outer housing including a wire clamping region that is disposed along a circumference of the outer housing, and an outer housing cover that is attached to the outer housing base. The wire management ring also includes an inner securing ring that is disposed within the outer housing base. The inner securing ring includes a plurality of notches that are configured to secure a plurality of wires passing through the wire management ring, respectively.

A portable wire management ring configured to secure wires. The wire management ring includes an outer housing that has an outer housing base in a ring shape, the outer housing including a wire clamping region that is disposed along a circumference of the outer housing, and an outer housing cover that is attached to the outer housing base. The wire management ring also includes an inner securing ring that is disposed within the outer housing base. The inner securing ring includes a plurality of notches that are configured to secure a plurality of wires passing through the wire management ring, respectively.