Abstract: A rubber track (1) has formed in it simple means that can carry a part of abnormal tensile force acting on substantially the entire length in the circumferential direction of the rubber track (1). The construction secures smooth operation of the rubber track and reliably prevents cutting of a steel cord (s1) due to such abnormal tensile force. A core (3) has an engagement section (3b) located in the center region in the longitudinal direction of the core, guide projections (3a) on the outer sides of the guide projections (3a). The core (3) further has tensile force carrying sections (4a, 4b) arranged at positions that are located in the thickness direction of the core and are closer to the outer periphery of the rubber track than the outer peripheral-side d-surfaces of the wing sections (3c). The tensile force carrying sections (4a, 4b) carry tensile force acting in the lateral direction of the core and also carry pressing force acting in the thickness direction of the core.

Abstract: A variable capacitance device includes a fixing member, a fixed electrode having a first end side fixed by the fixing member, an actuator element having a first end side fixed by the fixing member directly or indirectly, a movable electrode provided to connect to the actuator element directly or indirectly and disposed to approximately face the fixed electrode, and a driving section deforming a second end side of the actuator element, to change a distance between the fixed electrode and the movable electrode.

Abstract: Provided are a lens drive device capable of moving with good accuracy a lens in the direction of an optical axis thereof, and a lens module and an image pickup device provided with such a lens drive device. By a pair of polymer actuator elements 441 and 442, a lens holding member 43 is driven via coupling members 451A, 451B, 452A, and 452B. As a result, a lens 48 can be moved with good accuracy in the direction of the optical axis Z1 thereof. In addition, preferably, the coupling members 451A, 451B, 452A, and 452B have the rigidity same as or lower than that of each of the polymer actuator elements 441 and 442.

Abstract: A driving unit that may improve characteristics in a low temperature environment while implementing downsizing, and a lens module as well as an image pickup device with such a driving unit are provided. The driving unit includes one or a plurality of polymer actuator elements, and a voltage supply section supplying a driving voltage and a heating voltage to the polymer actuator element.

Abstract: A lens module includes: a lens forming an image of an object; a lens holder to hold an outer peripheral side of the lens to allow reciprocal movement in an optical axis direction of the lens; a housing at least one end side of which is opened, which includes a cylindrical receiving part having an inner surface, one surface of which, at a lateral side, contacts one surface of the lens holder at the lateral side perpendicular to the optical axis direction, and which receives the lens holder in the receiving part to allow reciprocal movement in the optical axis direction of the lens and in a sliding state; and an actuator part including a movable part which is displaced by a displacement amount corresponding to a level of an applied drive voltage and reciprocates the lens holder received in the housing between a first position and a second position in the optical axis direction.

Abstract: A geometry sensor includes: a detection surface including a plurality of polymer sensor elements and configured to detect an external object, the polymer sensor elements being arranged side-by-side along one or more directions and each generating a voltage according to a deformation; and a detecting section detecting a surface geometry of a region in the external object that is in contact with the detection surface, based on the voltage obtained from each of the polymer sensor elements in the detection surface.

Abstract: A sensor includes: a first polymer sensor element generating a first voltage corresponding to a deformation thereof; a second polymer sensor element generating a second voltage corresponding to a deformation thereof; a fixing member fixing a first end of each of the first and the second polymer sensor elements while electrically insulating the first ends from each other; and a detector detecting an acceleration and an angular acceleration based on the first voltage derived from the first polymer sensor element and the second voltage derived from the second polymer sensor element.

Abstract: A rubber track (1) has formed in it simple means that can carry a part of abnormal tensile force acting on substantially the entire length in the circumferential direction of the rubber track (1). The construction secures smooth operation of the rubber track and reliably prevents cutting of a steel cord (s1) due to such abnormal tensile force. A core (3) has an engagement section (3b) located in the center region in the longitudinal direction of the core, guide projections (3a) on the outer sides of the guide projections (3a). The core (3) further has tensile force carrying sections (4a, 4b) arranged at positions that are located in the thickness direction of the core and are closer to the outer periphery of the rubber track than the outer peripheral-side d-surfaces of the wing sections (3c). The tensile force carrying sections (4a, 4b) carry tensile force acting in the lateral direction of the core and also carry pressing force acting in the thickness direction of the core.

Abstract: A rubber crawler track in which a local side displacement is more effectively prevented to effectively prevent wheel run-off, which can reduce traveling vibration, and in which separation of metal cores is prevented for improved durability of the rubber crawler track and for reduced costs. The expression of ?r?r?2?r is satisfied, with “r” being the distance, in the circumferential direction of the rubber crawler track, between ends of horizontal protrusions (6) facing each other between adjacent metal cores (3) embedded in a rubber crawler body in a horizontal state of the rubber crawler track, “h” being the distance from a steel cord (5) layer embedded in the rubber crawler body to the core metal horizontal protrusions (6), and ?r being a value obtained by ?r=2?h/n where “n” is the number of sprocket teeth of a traveling device.

Abstract: A rubber crawler track in which a local side displacement is more effectively prevented to effectively prevent wheel run-off, which can reduce traveling vibration, and in which separation of metal cores is prevented for improved durability of the rubber crawler track and for reduced costs. The expression of ?r?r?2?r is satisfied, with “r” being the distance, in the circumferential direction of the rubber crawler track, between ends of horizontal protrusions (6) facing each other between adjacent metal cores (3) embedded in a rubber crawler body in a horizontal state of the rubber crawler track, “h” being the distance from a steel cord (5) layer embedded in the rubber crawler body to the core metal horizontal protrusions (6), and ?r being a value obtained by ?r=2?h/n where “n” is the number of sprocket teeth of a traveling device.