Abstract: A rolling bearing capable of achieving reduction in torque is provided. The rolling bearing includes an inner ring and an outer ring disposed coaxially with each other, a rolling element disposed between the inner ring and the outer ring, a seal member configured to cover an area between the inner ring and the outer ring from an outside in an axial direction, and filled grease disposed between the rolling element and the seal member. The filled grease includes a first ring-like part which extends to form a circumferential shape centering on a common axis of the inner ring and the outer ring, and which has contact with one of the inner ring and the outer ring, and a second ring-like part which extends to form a circumferential shape centering on the common axis, which is connected to the first ring-like part at an outer side in the axial direction, and which has contact with the seal member.

Abstract: The present invention is provided to prevent intrusion of dust, moisture, and the like, and simulatively deliver a kinetic operation feeling in response to an operation of an operator, and generate vibrations as necessary and separately from the operation of the operator. There is provided an inertial force imparting device including a stator, a mover that is arranged to be movable relative to the stator in a movable direction, a weight attached to the mover, an actuator unit that includes a shape memory alloy wire provided between the stator and the mover, instantaneously displaces the mover in the movable direction, and delivers an inertial force to the outside based on the displacement, and an elastic member that biases the mover toward the stator side along the movable direction, in which the shape memory alloy wire changes in length according to temperature, and changes the interval between the mover and the stator by expansion and contraction according to energization heating.

Abstract: A rolling bearing capable of achieving reduction in torque is provided. The rolling bearing includes an inner ring and an outer ring disposed coaxially with each other, a rolling element disposed between the inner ring and the outer ring, a seal member configured to cover an area between the inner ring and the outer ring from an outside in an axial direction, and filled grease disposed between the rolling element and the seal member. The filled grease includes a first ring-like part which extends to form a circumferential shape centering on a common axis of the inner ring and the outer ring, and which has contact with one of the inner ring and the outer ring, and a second ring-like part which extends to form a circumferential shape centering on the common axis, which is connected to the first ring-like part at an outer side in the axial direction, and which has contact with the seal member.

Abstract: The present invention is provided to prevent intrusion of dust, moisture, and the like, and simulatively deliver a kinetic operation feeling in response to an operation of an operator, and generate vibrations as necessary and separately from the operation of the operator. There is provided an inertial force imparting device including a stator, a mover that is arranged to be movable relative to the stator in a movable direction, a weight attached to the mover, an actuator unit that includes a shape memory alloy wire provided between the stator and the mover, instantaneously displaces the mover in the movable direction, and delivers an inertial force to the outside based on the displacement, and an elastic member that biases the mover toward the stator side along the movable direction, in which the shape memory alloy wire changes in length according to temperature, and changes the interval between the mover and the stator by expansion and contraction according to energization heating.

Abstract: A lens driving device includes a movable system having a lens frame to which a lens is fixed, and a fixation system including a guide shaft inserted into a guide hole formed in the lens frame to allow the lens frame to advance and retract in an optical axis direction and a restricting member for restricting rotation of the lens frame about the guide shaft. A lead screw is rotatable with respect to the fixation system about its axis which extends substantially parallel to the guide shaft, and the lead screw is threadedly fitted to the movable system. A motor rotates the lead screw to allow the movable system to advance and retract along the lead screw. A biasing spring is arranged substantially parallel to the guide shaft and biases the lens frame in both the axial direction and a direction orthogonal to the axial direction.

Abstract: Provided is a lens driving device, including: a movable system including a lens frame to which the lens is fixed; a fixation system including a guide shaft inserted into a guide hole formed in the lens frame to allow the lens frame to advance and retract in an optical axis direction and a restricting member for restricting rotation of lens frame about the guide shaft; a lead screw, which is a substantially-shaft-like member rotatable with respect to the fixation system about an axis thereof substantially parallel to the guide shaft, and in which a male thread threadably fitted to the movable system is formed; a motor for rotating the lead screw about the axis thereof to allow the movable system to advance and retract along the lead screw; and a biasing member arranged in substantially parallel to the guide shaft, for biasing the lens frame in the axial direction and about an axis thereof.

Abstract: An electric motor has a rotor having an end portion and a recessed portion formed at the end portion. A rotational shaft is mounted to the rotor. A stator covers an outer peripheral portion of the rotor and forms a magnetic field that generates a torque around the rotational shaft to thereby rotate the rotational shaft and the rotor. A bearing rotatably supports the rotational shaft and is entirely spaced-apart from the end portion of the rotor in an axial direction of the rotational shaft. A slider is slidably mounted around the rotational shaft and supports rotation of the rotational shaft about a rotational axis thereof. The slider is interposed between the bearing and the rotor so that a portion of the slider is entirely contained in the recessed portion of the rotor and the remaining portion of the slider is disposed in the space between the bearing and the rotor and in contact with the bearing.

Abstract: To provide an electric motor efficiently operating a torque to a rotor by a stator while preventing an increase in a friction load by a slider and capable of achieving small-sized formation of a total of an apparatus in an axis line direction, an electric motor 1 includes a rotor 3 substantially in a cylindrical shape, a rotating shaft 4 provided at a center of rotation of the rotor 3, a stator 5 for covering an outer peripheral portion 3a of the rotor 3 and having yokes 23, 24 capable of operating a torque around the rotating shaft 4 of the rotor 3 by forming a magnetic field, bearings 13, 14 fixed by the stator 5 by support members 11, 12 for supporting the rotating shaft 4 rotatably, and sliders 8 substantially in a plate-like shape interposed between the bearings 13, 14 and end portions 3c of the rotor 3, and the end portion 3c of the rotor 3 is formed with a first recessed portion 6 for containing at least a portion of the slider 8 in an axis line L direction of the rotating shaft 4 slidably around the r

Abstract: Provided is an optical module that is thin, allows freedom of design in configuration, and assures the accuracy of movement of an optical part while suppressing power loss. A stepping motor 26 and a lens barrel 27 that is moved by moving means 28 are positioned offset from each other along a base plate 23, and the optical axis of the lens barrel 27 and the axis of a rotor 37 provided in the stepping motor 26 are arranged in parallel with each other on one surface of the base plate 23. Further, a reduction gear train 29, which operatively couples the rotor 37 and the moving means 28 together, is arranged on the one surface.

Abstract: A gear transmitting device has such a structure as including an input gear, an output gear, and one or more intermediate gears for transmitting gear oscillation to the input and output gears. The gear transmitting device is also provided with a gear train including the input gear for transmitting oscillation to the output gear. The gear train includes, for gear engagement, one or more pairs of arc-circular tooth gears, and an involute tooth gear or a cycloidal tooth gear. With such a structure, the gear transmitting device can be reduced in size, and accordingly an electronic apparatus incorporating the gear transmitting device can be also reduced in size.

Abstract: A battery holding structure for an electronic timepiece has a battery frame having an opening for receiving a battery. The battery frame has a plurality of fittings each having a tapered overhang extending toward the opening for holding the battery in the opening.

Abstract: An electronic timepiece (100) is provided that has indicator hands capable of providing various indications. The electronic timepiece with indicator hands, characterized by comprising a time hand (101, 102) indicative of time, first and second indicator hands (103, 104) separately provided from the time hand (101, 102), and drive means for reciprocally rotating the first and second indicator hands (103, 104) in opposite directions to each other within a predetermined range.

Abstract: An electronic timepiece with indicator hands (100) having indicator hands capable of providing a variety of indications and capable of preventing unstable operation due to irregular movement of the indicator hand, which comprises: time hands (101, 102) showing time; first and second indicator hands (103, 104) provided separately from said time hands (101, 102); rotation means for reciprocally rotating said first and second indicator hands (103, 104) in directions opposite to each other within a predetermined range; and restricting means for restricting the range in which said first and second indicator hands (103, 104) can move. Where the indicator hands (103, 104) are rotating toward an outside of a restriction range due to impact or the like, the rotation is restricted by the restricting means.

Abstract: To provide a battery holding structure of an electronic timepiece having a simple constitution and being inexpensive, there is provided a battery frame (102) having an opening portion (113) for holding a battery (101), the battery frame (102) is provided with engaging portions (105 through 108) projected to a side of the opening portion (113) and having eaves portions (105a through 108a) provided with tapers and the battery (101) is inserted into the opening portion (113) and is held by the battery frame (102) and the eaves portions (103a through 109a)

Abstract: To provide an electronic timepiece enabling reliable detection of a state of rotation of an indication wheel such as a date dial. An ultrasonic motor 1130 has an ultrasonic rotor pinion 1134b. A date dial 1120 is disposed on a main plate 1102 in such a way as to rotate relative thereto. The ultrasonic rotor pinion 1134b is meshed with an intermediate date driving gear wheel 1142a. A date driving wheel 1150 is rotatably disposed on the main plate 1102. A date driving gear wheel 1150b is meshed with an intermediate date driving pinion 1142b. A date driving gear portion 1150b is meshed with a dial gear portion 1120a. A contact point spring 1160 is disposed on a spring guiding portion 1150d. The contact point spring 1160 rotates integrally with the date driving wheel 1150 through the rotation of the date driving wheel 1150. The state of rotation of the date driving wheel 1150 can be detected by contact of the contact point spring 1160 with the contact point pattern 1174.

Abstract: An electronic timepiece has a wheel train mounted for undergoing rotation and a transmission wheel for undergoing rotation in accordance with rotation of the wheel train. A contact point spring is connected to the transmission wheel for rotation therewith. The contact point spring extends substantially linearly through a rotational center of the transmission wheel. First and second detection patterns contact the contact point spring during rotation of the transmission wheel to generate a rotational position detecting signal corresponding to a rotational position of the transmission wheel. The first and second detection patterns are disposed at an angle of substantially 180 degree relative to the rotational center of the transmission wheel.

Abstract: An electronic timepiece with indicator hands having indicator hands capable of providing a variety of indications and capable of preventing unstable movement of the indicator hands, which comprises time hands (101, 102) for showing a time, first and second indicator hands (103, 104) provided separately from said time hands (101, 102), rotating means for reciprocally rotating said first and second indicator hands (103, 104) in directions opposite to each other within a predetermined range, and restricting means for restricting a movable range and capable of adjusting a restricting position of said first and second indicator hands (103, 104). Jumping of hands or the like of the first and second indicator hands (103, 104) due to impact or the like is restricted by the restricting means. Further, where there is a fear that the first and second indicator hands (103, 104) stop in a non-rotatable range, the restricting means is adjusted to change the movable range of the first and second indicator hand (103, 104).

Abstract: The conductor pattern on an ultrasonic motor lead board is prevented from being stripped off an ultrasonic motor lead board main body. An ultrasonic motor support member 124 for an ultrasonic motor 130 is firmly fixed on an ultrasonic motor shaft 132. A piezoelectric element 802 is firmly fixed to an ultrasonic stator main body 122b. The ultrasonic stator 122 is firmly fixed on the ultrasonic motor shaft 132. An ultrasonic motor lead board 136 is firmly fixed onto a backside of the ultrasonic motor support member 124. A conductor pattern 136b at its tip portion 136e and a conductor pattern 136b at its tip portion 136f are respectively welded to electrodes 803a, 803b of the piezoelectric element 802. An ultrasonic rotor 134 is arranged rotatable relative to the ultrasonic motor shaft 132. A pressurizing spring 138 puts the ultrasonic rotor 134 in pressure contact with the ultrasonic stator 122.

Abstract: To provide an electronic timepiece enabling reliable detection of a state of rotation of an indication wheel such as a date dial.An ultrasonic motor 1130 has an ultrasonic rotor pinion 1134b. A date dial 1120 is disposed on a main plate 1102 in such a way as to rotate relative thereto. The ultrasonic rotor pinion 1134b is meshed with an intermediate date driving gear wheel 1142a. A date driving wheel 1150 is rotatably disposed on the main plate 1102. A date driving gear wheel 1150b is meshed with an intermediate date driving pinion 1142b. A date driving gear portion 1150b is meshed with a dial gear portion 1120a. A contact point spring 1160 is disposed on a spring guiding portion 1150d. The contact point spring 1160 rotates integrally with the date driving wheel 1150 through the rotation of the date driving wheel 1150. The state of rotation of the date driving wheel 1150 can be detected by contact of the contact point spring 1160 with the contact point pattern 1174.

Abstract: A calendar electronic timepiece comprises a signal generating circuit for generating a date signal, a driving circuit for outputting a driving signal in accordance with the date signal generated by the signal generating circuit, and an ultrasonic motor driven by the driving signal outputted by the driving circuit. The ultrasonic motor is comprised of a piezoelectric vibrator having an electrode pattern and being driven by the driving signal outputted from the driving circuit to undergo expansion and contraction movement, a vibrating member connected to the piezoelectric vibrator and vibrationally driven by expansion and contraction movement of the piezoelectric vibrator, and a date dial disposed on the vibrating member to be frictionally driven by expansion and contraction movement of the piezoelectric vibrator.