Abstract: A timepiece display apparatus causes a day hand to move reciprocally by means of center wheel, driven day wheel, cam, lever, and rack. These wheels, cam, lever, and rack can be easily arranged to fit the available space on the main plate of the movement, and the construction of the display apparatus can thus be simplified. Furthermore, locating the cam between the rotary shaft and rack of the lever portion enables arranging a plurality of parts more compactly than if the cam is disposed to a different location, and affords a simple assembly.

Abstract: A timepiece display apparatus causes a day hand to move reciprocally by means of center wheel, driven day wheel, cam, lever, and rack. These wheels, cam, lever, and rack can be easily arranged to fit the available space on the main plate of the movement, and the construction of the display apparatus can thus be simplified. Furthermore, locating the cam between the rotary shaft and rack of the lever portion enables arranging a plurality of parts more compactly than if the cam is disposed to a different location, and affords a simple assembly.

Abstract: An electronic timepiece includes a radio wave receiving antenna (8) for receiving radio waves, electromagnetic motors (61, 65) for driving a time display part, a battery (5), and a body case for receiving the antenna (8), electromagnetic motors (61, 65), and the battery (5). The antenna (8), electromagnetic motors (61, 65), and the battery (5) do not overlap as viewed in the viewing direction of a time display part, that is, they do not overlap two-dimensionally. By such a structure, the electronic timepiece can be thin and flat.

Abstract: The driving portion 4 is composed of multipolar motor 43. The multipolar motor 43 includes a coil 431 for multipolar motor 43, a stator 432 for multipolar motor 43, for transmitting a magnetic field from coil 431, and a rotor 433 for multipolar motor 43 installed ratably in a stator hole of stator 432. A multipolar magnet is provided on a peripheral part of rotor 433. A plurality of teeth are formed on stator 432 toward rotor 433. Clock hands for displaying time are installed on the rotation axis of rotor 433.

Abstract: Thermal energy is converted into a mechanical energy by a thermal converter that includes a phase change material whose phase changes between solid and liquid as a result of temperature changes in the operating environment. Because the phase change material does not change to the gas state during operation, good thermal conductivity can be achieved within a normal operating temperature range and sufficient mechanical energy can be obtained, thereby enhancing the conversion efficiency of the thermal converter. Also, because the case in which the phase material is contained is not required to be at a high pressure, the case can be easily manufactured and a compressing means such as a strong spring is not required, thus reducing a size of whole device.

Abstract: An electronic timepiece includes a radio wave receiving antenna (8) for receiving radio waves, electromagnetic motors (61, 65) for driving a time display part, a battery (5), and a body case for receiving the antenna (8), electromagnetic motors (61, 65), and the battery (5). The projection images projecting the antenna (8), electromagnetic motors (61, 65), and the battery (5) do not overlap as viewed in the viewing direction of a time display part are different each other, that is, they do not overlap two-dimensionally. By such a structure, the electronic timepiece can be thin and flat.

Abstract: There are provided a power-generation mechanism (2) having a rotary weight (21) and a generator for converting the mechanical energy by the rotation of the rotary weight (21) into electrical energy, a time-measuring mechanism for measuring time, and a receiving mechanism having an antenna (6) for receiving wireless information, and the antenna (6) is placed further towards the outside in the radial direction of the rotary weight (21) than the rotation path of the outer circumferential edge of the rotary weight (21).

Abstract: Thermal energy is converted into a mechanical energy by a thermal converter that includes a phase change material whose phase changes between solid and liquid as a result of temperature changes in the operating environment. Because the phase change material does not change to the gas state during operation, good thermal conductivity can be achieved within a normal operating temperature range and sufficient mechanical energy can be obtained, thereby enhancing the conversion efficiency of the thermal converter. Also, because the case in which the phase material is contained is not required to be at a high pressure, the case can be easily manufactured and a compressing means such as a strong spring is not required, thus reducing a size of whole device.

Abstract: An electronic device capable of increasing the braking torque applied to an electric power generator without causing a significant reduction in electric power generated by the electric power generator. The electronic device, which may be embodied in an electronically controlled mechanical clock, includes an electric power generator for converting mechanical energy transmitted from a spring via a wheel train to electrical energy, and a rotation controller for controlling the rotation period of the electric power generator.