Abstract: A plug connector comprising a rigid insulator plate made of an electrical insulator, and contact strip members embedded in the insulator. The insulator plate comprises a mating portion for mating with a socket contact and a mount portion for mounting the plug connector on a circuit board. The contact strip members extend in a surface of the circuit board from the mating portion to the mount portion and are led out from the mount portion to provide connecting portion for electrically connecting with the circuit board. The top surfaces of the contact strip members are exposed in the surface of the mating portion and form contact surface for coming into contact with socket contacts of the socket connector mating with the mating portion.

Abstract: A small-sized electronic apparatus having one or more replaceable batteries housed in a battery compartment of the body of the apparatus, wherein the apparatus comprises: a cover which is moved to open or close the battery compartment; a switching member for switching on and off the power source; and a linking member to which the switching member is attached and which is moved with the movement of the cover to allow the switching member to turn off the power source when the cover is moved to open the battery compartment, whereby the power is automatically turned off when the cover for the battery compartment is opened, so that there is no possibility of the stored data being lost or distorted even if the user tries to replace the battery without turning off the power switch.

Abstract: A folding electronic device comprises a body and a cover member, rear walls of which are rotatably coupled with each other by hinges. When the cover member is closed, the rear wall of the cover member is positioned rearwardly beyond the rear wall of the body while the lower end of the rear wall of the cover member is positioned downwardly beyond the upper end of the rear wall of the body. A clearance defined between the rear walls of the body and the cover member is blocked by a closing member which is provided in the body. A spring is mounted on the closing member to rearwardly urge the same. Due to the urging force of the spring, the closing member is in contact with the rear wall of the cover member when the cover member is closed and when the same is opened by 180.degree., as well as when the same is being opened/closed.