Abstract: A circuit board electrical connector with a latch, includes an insulation housing (10) having a base section (11) with a slot (13) in which a plurality of contact elements (30) are arranged and a pair of side walls (12) extending laterally from opposite ends of the base section and having latch portions (18) at their free ends to latch a circuit board which is inserted into the slot and rotated to a latch position; and restriction portions (22, 22D) for preventing the latch portions from flexing in a direction other than a latch operation direction so that damage to the latch portions caused by excessive flexure in the directions is avoided.

Abstract: A dental treatment apparatus with a root canal length measurement function comprising a cordless handpiece equipped with at least a cutting tool drive motor, a root canal length measurement circuit and a power supply battery, and a charger equipped with at least a charge circuit for charging the power supply battery. With this structure, the handpiece can be operated as desired without interference with any tube since no tube is necessary to connect the handpiece to a main control unit, thereby capable of providing an easy-to-use treatment apparatus. By charging the power supply battery for the handpiece using the charger, the battery can be used repeatedly.

Abstract: An electrical connector includes a housing (3) with a base (4) having a slot(5); a plurality of contact elements (103, 105) provided in the slot; a pair of fixed members (21) extending laterally from opposite ends of the base; a pair of movable members (23) extending from the fixed members and having L-shaped cross-section foot areas; and a pair of fixing members (9) attached to the fixed members and having a first controlling section (301) to control outward movement of the movable members and a second controlling section (303) to control inward movement of the movable members.

Abstract: A card edge connector to be surface-mounted on a circuit board having a plurality of conductors, which includes an insulation housing (100) having a base section (111) with a slot (112) for receiving a card edge on which a plurality of contact pads are provided; a plurality of bent-type contact elements arranged in the slot on at least one side (114) on which the connector is to be mounted on the circuit board; a plurality of movable arms (301) having contact points (307) for contact with the contact pads of the card; a plurality of fixing arms (303) having connection sections for connection to the conductors of the circuit boards and fixing sections (500) to be fixed to the insulation housing; a plurality of central arms (302) for connecting the movable arms and the fixing arms to form the substantially C-shaped, flexible contact elements; the connection sections of the fixing arms being at positions opposite to the central arms with respect to the fixing sections (500); and the contact points of the movable

Abstract: A modular board electrical connector which includes first and second insulation housings stacked one upon another and having first and second bases with first and second card receiving slots therein and first and second pairs of side walls extending forwardly from opposite ends of the first and second bases and having a latch member on a free end thereof; a plurality of contact elements arranged in the first and second card receiving slots such that when a modular board is inserted into the first or second card receiving slot and turned to a latch position, they are brought into contact with contact pads of the modular board; a pair of support members extending forwardly from opposite ends of each of the card receiving slots along the side walls for supporting the modular board inserted in the card receiving slot; and the latch members of the first insulation housing being retreated from those of the second insulation housing to facilitate diagonal insertion of a modular board into the card receiving slot of