Abstract: An electronic apparatus such as a portable computer includes a box-shaped housing body and a display unit supported on the housing body. A circuit board on which a cable connector is mounted is contained within the housing body. The display unit has a display housing containing a display device. A cable extending between the inside of the housing body and the inside of the display housing has a first end portion and a second end portion. The first end portion is electrically connected to the cable connector. The second end portion is electrically connected to the display device. The housing body has an opening portion for exposing the cable connector. The opening portion is covered by a detachable cover.

Abstract: A dot matrix print head comprises a print wire unit in which a plurality of print wires are slidably mounted, an electromagnet unit having a plurality of electromagnets, and an armature unit secured to the print wire unit and to the electromagnet unit. The armature unit has a cover, a plurality of springs and a plurality of armatures. The armatures are held in the cover by a sub yoke secured to the cover.

Abstract: In a heat pump system according to the present invention, a plurality of heat exchangers are arranged in sequence in the vertical direction in a tank for storing a heat medium therein, and these heat exchangers are connected in series to a heat exchanger arranged outside the tank to construct a cooling medium circulating passage. A by-passing passage by-passing the heat exchanger arranged outside the tank and expanding means arranged in series to this heat exchanger is formed in the cooling medium circulating passage, and an expansion passage is arranged in parallel to the cooling medium circulating passage connected to the heat exchangers within the tank.

Abstract: A printing apparatus includes a type drum the outer circumferential surface of which has a first set of type including a plurality of type faces arranged in a counter-clockwise spiral and a second set of type including a plurality of type faces arranged in a clockwise spiral. The type drum is both reciprocated and rotated in synchronous fashion by cooperation between reciprocating and rotating drive means so that the sets of type disposed on the type drum pass the positions of a plurality of printing hammers confronting the drum and adapted to perform printing by striking the type faces on the drum through an inked ribbon and recording medium.