A sensor switch includes two electroconductive terminals and two electroconductive beads. The electroconductive terminals are spaced apart along an axis. Each of the electroconductive terminals has an inner surrounding surface surrounding the axis and having an indented segment indented away from the axis. The electroconductive beads are movably and respectively disposed in the electroconductive terminals. When the sensor switch is placed such that the axis horizontally leveled, the electroconductive beads are respectively retained in the indented segments of the electroconductive terminals to be spaced apart from each other so that the sensor switch is in an open state.

A sensor switch includes two electroconductive terminals and two electroconductive beads. The electroconductive terminals are spaced apart along an axis. Each of the electroconductive terminals has an inner surrounding surface surrounding the axis and having an indented segment indented away from the axis. The electroconductive beads are movably and respectively disposed in the electroconductive terminals. When the sensor switch is placed such that the axis horizontally leveled, the electroconductive beads are respectively retained in the indented segments of the electroconductive terminals to be spaced apart from each other so that the sensor switch is in an open state.

According to various embodiments, there is provided a key switch mechanism including: a key button; a plunger attached to the key button and displaceable between a neutral position and an activation position; an elastomeric dome which, when the plunger is in the neutral position, is non-deformed and which, when the plunger is in the activation position, is elastically deformed by the plunger; a conductive spring having a stationary end portion and a moveable end portion, the stationary end portion electrically coupled to a circuit, and the moveable end portion coupled to the elastomeric dome in a manner to be moved when the plunger is displaced towards the activation position, in connection with the corresponding deformation of the elastomeric dome; and an electrical contact electrically coupled to the circuit, wherein, when the plunger is in the neutral position, the electrical contact is arranged at a distance from the moveable end portion, and, when the plunger is in the activation position, the moveable end portion is moved to contact the electrical contact.

According to various embodiments, there is provided a key switch mechanism including: a key button; a plunger attached to the key button and displaceable between a neutral position and an activation position; an elastomeric dome which, when the plunger is in the neutral position, is non-deformed and which, when the plunger is in the activation position, is elastically deformed by the plunger; a conductive spring having a stationary end portion and a moveable end portion, the stationary end portion electrically coupled to a circuit, and the moveable end portion coupled to the elastomeric dome in a manner to be moved when the plunger is displaced towards the activation position, in connection with the corresponding deformation of the elastomeric dome; and an electrical contact electrically coupled to the circuit, wherein, when the plunger is in the neutral position, the electrical contact is arranged at a distance from the moveable end portion, and, when the plunger is in the activation position, the moveable end portion is moved to contact the electrical contact.

A method of manufacturing an electric contact includes a welding step of welding a contact material (12) to a base material (11), and a crushing step of crushing the contact material (12), wherein one or more absorption holes (11a and 11b) that absorb deformation of the base material (11) in a thickness direction (Z direction) caused by the crushing of the contact material (12) are formed around the welding position of the contact material (12) on the base material (11).

A first conductive pattern according to the present disclosure includes a first land electrode and a second land electrode, in which at least a portion of the first land electrode is arranged in an inner portion of a first circle defined by a center point and a first radius, the second land electrode is arranged on a second circle defined by the center point and a second radius that is larger than the first radius to surround the first land electrode, the second land electrode is not arranged in the inner portion of the first circle, the first land electrode is not arranged on the second circle, and the first land electrode and the second land electrode are arranged on a third circle defined by the center point and a third radius that is larger than the first radius and is smaller than the second radius.

A first conductive pattern according to the present disclosure includes a first land electrode and a second land electrode, in which at least a portion of the first land electrode is arranged in an inner portion of a first circle defined by a center point and a first radius, the second land electrode is arranged on a second circle defined by the center point and a second radius that is larger than the first radius to surround the first land electrode, the second land electrode is not arranged in the inner portion of the first circle, the first land electrode is not arranged on the second circle, and the first land electrode and the second land electrode are arranged on a third circle defined by the center point and a third radius that is larger than the first radius and is smaller than the second radius.

A switch device includes a plurality of lead frames that is conductive and configured to electrically connectable to an external device, a contact-separation mechanism configured to allow the plurality of lead frames to be electrically connected to and separated from each other, and an electric element configured to connect the plurality of lead frames to each other. The electric element is surface-mounted on the lead frames and sealed with resin. In each of the lead frame, the boundary, such as a groove or a notch, is formed along the outer edge of the arrangement position of the electric element.

A switch device includes a plurality of lead frames that is conductive and configured to electrically connectable to an external device, a contact-separation mechanism configured to allow the plurality of lead frames to be electrically connected to and separated from each other, and an electric element configured to connect the plurality of lead frames to each other. The electric element is surface-mounted on the lead frames and sealed with resin. In each of the lead frame, the boundary, such as a groove or a notch, is formed along the outer edge of the arrangement position of the electric element.

A rubber and metal composite electric contact and a preparation process therefor. The rubber and metal composite electric contact is a circular layered complex which is formed by tightly combining a metal sheet layer having a plurality of through holes and a rubber layer by means of thermal vulcanization molding and which has a thickness of 0.1 to 5 mm and a diameter of 1 to 15 mm. There is no isolation layer between the rubber layer and the metal layer of the electric contact, so no rubber overflows the outer surface of the metal layer. In the rubber and metal composite electric contact, the rubber and metal are combined firmly and the overall strength of the electric contact is adjustable; the electric contact also has good dust resistance; and the electric contact thus has stable and reliable electrical conductivity.