Nec Corporation

Tamura Electric Works, Ltd.

Nippon Electric Co., Ltd.

Nippon Telegraph and Telephone Corporation

Takashi Oyamada

Osamu Kai

Sigeki Hayasaka

Mamoru Takahashi

Koji Yamashita

Masahiro Wada

Shin Iwabuchi

Takeshi Matsumoto

Shinjiro Umetsu

Makoto Ueki

Kozo Maemura

Yoshiaki Takeda

Yasuo Ueno

Toshiharu Kinoshita

Toshiaki Hayasaka

Yoshio Shinoda

Toshimichi Kubota

Mitsuo Masuda

Noritomo Arai

A heat-radiating structure of an electronic card unit is compact and reinforces a printed circuit board while improving heat radiation efficiency. Card unithas dual function reinforcing plate-heat dissipatersandat the upper and lower edges of a printed circuit boardon which a heat-generating componentis mounted. Heat generated by componentis conducted to the reinforcing plate-heat dissipaters by passing a fluid in a heat pipe, a heat-conducting sheetor a heat radiation circulation pipeto be removed into the air. The reinforcing plates-heat dissipatersandare formed with a plurality of air ventsand

Electronic card unit and method for removing heat from a heat-generating component on a printed circuit board

A sealed housing is provided with a body, a cover, and a movable fin for radiating heat while suppressing a change in internal pressure, and preventing invasion of water vapor or poisonous gas from the exterior to thereby avoid an accident caused by dew condensation, and corrosion of an electrical circuit component. The movable fin automatically slides toward the inside or outside of the sealed housing depending on a change in internal atmospheric pressure of the sealed housing following a change in internal temperature thereof. When the temperature inside the sealed housing rises due to heat from the electrical circuit component mounted in a package inside the sealed housing, a heat radiation area of the movable fin increases while keeping sealing tightness so that a heat radiation effect can be enhanced.

Housing structure of electronic device and heat radiation method therefor

A telecommunication device includes a housing formed by gas-assist injection molding and having an inner wall, outer wall and a hollow space formed therebetween and receiving therein gas refrigerant. The hollow space has a plurality of vertical channels wherein the gas refrigerant cools the internal of the housing by natural convection within the vertical channels. A movable wall is disposed in the vertical channel for controlling a pressure rise occurring upon a temperature rise.

Telecommunication device including a housing having improved heat conductivity

A water-proof modular connector includes a plug socket to be fixed to an object, and a plug detachably coupled to the plug socket. The plug socket includes a plug socket body having first and second socket-openings directing outwardly and inwardly of the object, respectively, a modular jack unit having first and second jack-openings directed in opposite directions to each other, and a holder which holds the modular jack in the plug socket body such that the first and second jack-openings are directed to the first and second socket-openings, respectively. The plug includes a plug body through which a communication cable passes, a modular plug connected to the communication cable, a first positioning unit which positions the modular plug in the plug body, a cap which detachably couples the plug body to the plug socket body such that the modular plug is inserted into the first socket-opening, and a water-proof unit ensuring water-proof between the plug socket body and the plug body.

Water-proof modular connector

An enclosure for outdoor equipment, which can prevent the enclosure from being damaged by a rise of air pressure inside the enclosure by exhausting air from the enclosure, and further can secure safety of the enclosure and can secure easiness for fixing an inside air pressure adjusting mechanism to the enclosure and also can prevent a dew condensation from occurring in the enclosure, is provided. The enclosure for outdoor equipment provides an inside air pressure adjusting mechanism. The inside air pressure adjusting mechanism provides a valve seat and a valve element which is seated on the valve seat in a state that the valve element can be opened and closed by placing a sealing component between them. The inside air pressure adjusting mechanism is inserted to a hole of the enclosure for outdoor equipment, in which an electronic circuit is disposed, and fixed so that the inside air pressure adjusting mechanism does not stick out largely from the front surface of the enclosure for outdoor equipment. With this, the atmosphere can be prevented from entering the enclosure and the air inside the enclosure is exhausted to the outside corresponding to a rise of the temperature inside the enclosure.

Enclosure for outdoor equipment

A mounting structure for communication equipment comprises two housings (a main body portion and a fixing portion) which are designed to be separable from each other, and the fixing portion is equipped with a heat exchanger for heat-exchanging heat generated in the main body portion with cold air, thereby radiating the heat from the inside of the main body portion to the outside.

Mount structure of communication equipment

A casing structure for a communication equipment in which panels mounted in the casing are electrically insulated from a messenger wire. When the casing of the communication equipment is mounted on the messenger wire, the insulation prohibits impediments otherwise caused by extraneous noise current flowing in the messenger wire. The mounting portion of the case has a handle structure which provides improved operability and convenience.

Casing structure of communication equipment

A sealed type casing comprises a casing body 10, a cover 9, one motor 12 fixed to a rear face plate 10a of the casing body, a plurality of inner and outer heat exchange fins 11a, 11b integral with and formed on inner and outer surfaces of the rear face plate so that the heat exchange fins are arranged vortically in an overlapping manner around a rotary shaft 12a of the motor, a first centrifugal fan 13 adapted to be rotated inside the casing body by the motor and sending the air to the inner heat exchange fins, and a second centrifugal fan 13 adapted to be rotated outside the casing body by the motor and sending outside air to the outer heat exchange fins. When the motor is rotated, the centrifugal fans apply a centrifugal force to the air sucked from a region close to the rotary shaft of the motor, and send out the air toward the heat exchange fins.

Sealed type casing

A communication device for use in a base station of a portable telephone system has a radiation section including a spiral projection formed on an external surface of a casing to define a spiral air passage on the casing, a fan disposed on the casing inside a central space of the spiral passage, and a motor disposed inside the casing to drive the fan through a shaft penetrating the wall of the casing. A spiral air flow generated by the fan functions for efficient heat radiation through the casing. The spiral projection is formed by drawing the wall of the casing.

Device having an efficient heat radiation casing

A heat sink structure for an electronic device of the type having a chassis and a plug-in unit provides efficient heat dissipation for a heat-generating component on a printed circuit board within the unit. In a preferred embodiment, a first heat pipe is fixedly attached to a heat dissipating plate for the heat generating component. At the opposite end, the first heat pipe is held by a connector plug attached to the unit. At one end, a second heat pipe is held by a plug-receiving seat that is fixedly attached to a backboard of the chassis. At the opposite end, the second heat pipe is fixedly attached to a heat dissipating portion on the chassis. The first heat pipe, plug, plug-receiving seat and second heat pipe transfer heat from the heat-generating component to the heat-dissipating portion.

Electronic device having a plug-in unit with a heat sink structure

A watch type paging receiver which may be waterproof in the daily life and operated with an air cell is provided. Each of a body casing which is accommodating a receiver and a battery casing which is holding a battery accommodated within the body casing is provided with an air vent by which the inside of the battery casing communicates with the outside of the body. The air vent is formed of hole in a battery casing wall being adjacent to the belt and the air vent of the battery casing is provided with a porous waterproofing filter. An air vent communicating from inside to outside is opened at the portion corresponding to each air vent of the body casing and the battery casing.

Watch type paging receiver

Display pager

Printer for display pagers

Digital display pager

A housing and holder assemply applicable to, for example, a radio pager or similar portable communication apparatus includes a battery cover which is attached to the bottom of a housing of the apparatus and slidable into and out of engagement with the housing. A holder is removably mounted on the back of the housing while a clip is provided on the holder. The apparatus may be put on a person's waist belt or the like through the clip. Even when the housing and the holder are locked to each other, the battery cover may be slid to be removed from the housing.

Growing community of inventors

Tokyo, Japan

Takashi Oyamada