Abstract: A secondary battery charging system includes a secondary battery charging device and a power generation device that generates a charging current. The secondary battery charging device controls the charging a secondary battery, which has a protection timer that counts a first elapsed time from a start of charging. The secondary battery charging device includes a charging switch that controls a supply of the charging current, a time management timer portion that counts a second elapsed time starting from a point at which the charging switch becomes conductive and performs a charging stop determination and that counts a third elapsed time starting from a point at which the charging switch is cut off and performs a charging start determination, and a charging control portion that causes the charging switch to be conductive or cut off based on results of the charging stop determination and the charging start determination.

Abstract: A radio communication system of a frequency hopping system, which carries out time division multiplex by TDMA and carries out communications while changing over two or more frequencies with respect to a radio link, wherein radio resources are efficiently utilized by establishing a plurality of radio links. A first communication apparatus periodically transmits control data by a frame cycle and a second communication apparatus which is a communication partner thereof receives the above-described control information during standby and secures synchronization in timing of frames and slots and timing of frequency hopping. Communication signals between both communication apparatuses and control information are overlapped in a slot to establish radio links. Once radio links are established in a plurality of slots other than a slot for transmitting control information, control is performed such that the control information is overlapped in the slots in which a radio link is established.

Abstract: A secondary battery charging system includes a secondary battery charging device and a power generation device that generates a charging current. The secondary battery charging device controls the charging a secondary battery, which has a protection timer that counts a first elapsed time from a start of charging. The secondary battery charging device includes a charging switch that controls a supply of the charging current, a time management timer portion that counts a second elapsed time starting from a point at which the charging switch becomes conductive and performs a charging stop determination and that counts a third elapsed time starting from a point at which the charging switch is cut off and performs a charging start determination, and a charging control portion that causes the charging switch to be conductive or cut off based on results of the charging stop determination and the charging start determination.

Abstract: An indicator has a permanent magnet and a coil rotatably supported on the permanent magnet and wound so as to form a surface that is parallel to and disposed at a preselected distance from a bottom surface of the permanent magnet. The coil generates a torque by interaction with a magnetic field of the permanent magnet upon supply of a current to the coil. An indicator needle is mounted to undergo rotation with the coil through a range of angles corresponding to indicator angles of the indicator needle. A pair of spiral springs urge the indicator needle in a direction opposite to a direction of the torque to undergo rotation through the range of indicator angles. The pair of spiral springs comprise a first spiral spring connected at one end thereof to one end of the coil and a second spiral spring connected at one end thereof to another end of the coil.

Abstract: A music practice supporting appliance has an input unit that inputs a musical sound of a musical instrument and/or vocal music, converts the musical sound into an electric signal, and outputs the electric signal as an input signal. An amplifying unit amplifies the input signal outputted from the input unit. A processing unit processes the amplified input signal to obtain input signal data. A first memory unit stores the input signal data. A second memory unit stores input signal data stored in the first memory unit when the input signal data stored in the first memory unit exceeds a preselected storage capacity of the first memory unit.

Abstract: A radio communication system of a frequency hopping system, which carries out time division multiplex by TDMA and carries out communications while changing over two or more frequencies with respect to a radio link, wherein radio resources are efficiently utilized by establishing a plurality of radio links. A first communication apparatus periodically transmits control data by a frame cycle and a second communication apparatus which is a communication partner thereof receives the above-described control information during standby and secures synchronization in timing of frames and slots and timing of frequency hopping. Communication signals between both communication apparatuses and control information are overlapped in a slot to establish radio links. Once radio links are established in a plurality of slots other than a slot for transmitting control information, control is performed such that the control information is overlapped in the slots in which a radio link is established.

Abstract: In a time division multiplex access (TDMA-TDD) type wireless communication system in which a communication operation is carried out between a first communication apparatus (mother appliance) and a second communication apparatus (child appliance), and since a slot diversity mode is selected while considering power consumption on the side of the second communication apparatus, the wireless communication system performs such a wireless communication having a higher wireless quality. Based upon a power supply remaining energy capacity on the side of the second communication apparatus, and an electromagnetic wave environment when a wireless signal is received, a slot diversity mode is selected.

Abstract: The switch structure according to the present invention is obtained by interposing an elastic connection member between the circuit board provided with electrodes and a push switch fixed to a case of an electronic device. The elastic connection member has a structure in which conductive layers and insulation layers are alternately laminated. The conductive layers of a first lamination layer surface on which the conductive layers and the insulation layers of the elastic connection member are exposed abut against the electrodes so that the electric connections therebetween are established. The push switch is pushed down, and a contact portion thereof abuts against the plurality of conductive layers on a second lamination layer surface, whereby the electrodes are in a conductive state. Even if the push switch is pushed strongly, the elastic connection member deforms to absorb the force. As a result, the switch structure which hardly breaks is obtained.

Abstract: The switch structure according to the present invention is obtained by interposing an elastic connection member between the circuit board provided with electrodes and a push switch fixed to a case of an electronic device. The elastic connection member has a structure in which conductive layers and insulation layers are alternately laminated. The conductive layers of a first lamination layer surface on which the conductive layers and the insulation layers of the elastic connection member are exposed abut against the electrodes so that the electric connections therebetween are established. The push switch is pushed down, and a contact portion thereof abuts against the plurality of conductive layers on a second lamination layer surface, whereby the electrodes are in a conductive state. Even if the push switch is pushed strongly, the elastic connection member deforms to absorb the force. As a result, the switch structure which hardly breaks is obtained.

Abstract: A permanent magnet (17) of a meter portion (3) (FIG. 2A) has a disc shape having a hole formed in a center thereof, and is magnetized in an axial direction of a central shaft (18). In a bottom surface of the permanent magnet (17), magnetic domains are formed so that one side constitutes North pole and the other side constitutes South pole. Coils (15a, 15b) are wound on the same plane to form surfaces parallel to the bottom surface of the permanent magnet (17), and are arranged on one bottom surface side of the permanent magnet (17) at a predetermined distance from the permanent magnet (17). An outer spiral spring (11) and an inner spiral spring (12) are formed to be helical on the same plane. Each of those spiral springs is fixed to a bridge (42) at one end thereof and is fixed to a coil (15) at the other end thereof. The coil (15) is urged in a direction opposite to a direction in which an indicator needle (13) (which rotates about the central shaft (18) together with the coil (15)) swings.

Abstract: Provided is a music practice supporting appliance, which receives an input of sounds of a musical instrument, vocal music, and the like and acquiring and displaying deviation of those sounds inputted by a practicing person from preset reference sounds with high precision so that a change in the deviation is easier to grasp for the practicing person than in the case of a conventional music practice supporting appliance. In the music practice supporting appliance, a musical interval of an input signal of sound inputted in a signal input unit (1) is detected by a musical interval detecting unit (6), and a sound volume thereof is detected by a sample-and-hold unit (8). The detected pieces of data are displayed on a display unit (11). Since the musical intervals and the sound volumes of the sounds of the musical instrument can be objectively displayed, the display is useful in practices of playing the musical instrument. Also, by storing the data in a memory unit, practiced contents can be confirmed later.

Abstract: Provided is a small scale practice device, which is capable of displaying tuning results that are exact and highly-responsive and information on a tempo with good visibility, and being attached to a musical instrument. A scale practice device is fixed to a musical instrument, a tone generated by the musical instrument is collected as a mechanical vibration, and tuning results are calculated. The way of light emission of a plurality of light-emitting elements in a light-emitting element group in the scale practice device is controlled, whereby a tempo and tuning results are expressed so that a player can recognize the tempo and the tuning results simultaneously with ease.

Abstract: A synchronized beat notification system has a master device having a beat input unit and a master radio communication unit for transmitting as radio information a beat inputted to the beat input unit together with identification information corresponding to information identifying the master device. A slave device has a slave radio communication unit for receiving the radio information transmitted from the master radio communication unit and a beat notification unit for performing notification of the beat inputted to the beat input unit in accordance with the information received by the slave radio communication unit. The slave radio communication unit extracts from the received radio information the identification information corresponding to the master device and controls the beat notification unit to perform beat notification only when the extracted identification information coincides with identification information on a master device intended to become a communication partner with the slave device.

Abstract: The present invention relates to a radio communication system of a frequency hopping system, which carries out time division multiplex by TDMA and carrying out communications while changing over two or more frequencies with respect to a radio link, wherein it is therefore an object to effectively utilize radio resources by establishing a plurality of radio links. The first communication apparatus periodically transmits control data by a frame cycle and the second communication apparatus of a communication partner thereof receives the above-described control information during standby and secures synchronization in timing of frames and slots and timing of frequency hopping, wherein communication signals between both communication apparatuses and control information are overlapped in a slot to establish radio links.

Abstract: In a time division multiplex access (TDMA-TDD) type wireless communication system in which a communication operation is carried out between a first communication apparatus (mother appliance) and a second communication apparatus (child appliance), and since a slot diversity mode is selected while considering power consumption on the side of the second communication apparatus, the wireless communication system performs such a wireless communication having a higher wireless quality. Based upon a power supply remaining energy capacity on the side of the second communication apparatus, and an electromagnetic wave environment when a wireless signal is received, a slot diversity mode is selected.

Abstract: A moving member holding device that holds at a first position a moving member that makes a movement between the first position and a second position relative to a fixed member, includes: an engaging member provided at either the moving member or the fixed member and having an engaging portion; and a holding member provided at the moving member or the fixed member where the engaging member is not provided, which becomes engaged with the engaging portion of the engaging member to hold the moving member at the first position. And: a position of the engaging portion of the engaging member changes along a direction in which the moving member makes the movement as the engaging member moves; the first position at which the moving member is held is adjusted along the direction in which the moving member makes the movement as the position of the engaging portion changes; and a direction in which the engaging member moves and the direction of the movement of the moving member are different from each other.

Abstract: An electric discharge detection circuit includes an x-ray tube, a power supply that applies a high voltage to the x-ray tube, a tube voltage that detects the voltage applied to the x-ray tube, a differentiation circuit that differentiates a signal output from the tube voltage detector, a zero-crossing comparator that discriminates the polarity of an output signal from the differentiation circuit; a re-triggerable one-shot pulse generating circuit that generates one-shot pulses at a regular period, using the pulse output from zero-crossing comparator as the trigger, a counter that is input with the one-shot pulse output and counts the pulses to output from the zero-crossing comparator while operation is enabled period, an x-ray cut-off circuit that terminates the generation of high voltage when it receives the carry output and a display that displays the occurrence of an electric discharge phenomenon upon receipt of the carry output.

Abstract: There is provided a synchronized beat notification system for reliably and simultaneously notifying a plurality of players of beats indicated by a conductor. A beat signal indicated by a user with arbitrary timing by using a master device is radio-transmitted to a slave device. The slave device that has received the signal performs notification of beat indication by visual display, aural expression, bodily-sensational expression, or the like.

Abstract: A moving member holding device that holds at a first position a moving member that makes a movement between the first position and a second position relative to a fixed member, includes: an engaging member provided at either the moving member or the fixed member and having an engaging portion; and a holding member provided at the moving member or the fixed member where the engaging member is not provided, which becomes engaged with the engaging portion of the engaging member to hold the moving member at the first position. And: a position of the engaging portion of the engaging member changes along a direction in which the moving member makes the movement as the engaging member moves; the first position at which the moving member is held is adjusted along the direction in which the moving member makes the movement as the position of the engaging portion changes; and a direction in which the engaging member moves and the direction of the movement of the moving member are different from each other.

Abstract: A tuning device is provided, which allows comfortable tuning operation and easy storage and efficiently samples only a target sound to be tuned. The tuning device is structured such that a vibration sensor is provided to a clip and the clip and a tuning state display portion are connected through a flexible joint. A piezoelectric element is used as the vibration sensor and also serves as a reference sound generator.