JP2008061054A - Explosion-proof ip mobile phone - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a telephone which instructs or operates at an arbitrary location having an explosion dangerous atmosphere, can execute a mass storage data communication, and also has a high security. <P>SOLUTION: In an explosion-proof case body 1 formed with a radio wave transmission member, a battery 4, a board 5 mounting an essentially safe barrier circuit, an antenna 6, a control board 7 mounting an IP (Internet Protocol) telephone control circuit using a CDMA (Code Division Multiple Access) technology, and a display 8 having a display face to which a window glass 9 is fitted are successively stacked and accommodated. A rear opening 1a of the explosion-proof case main body 1 is covered with a rear cover 2, a front opening 1b of the explosion-proof case body 1 is covered with a front cover 3 having an observation window hole 3a to which a speaker 10 and a microphone 11 are fitted, and an input board 12 arranged with an operation key is fixed to the front of the front cover 3. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to an explosion-proof IP (Internet Protocol) mobile phone that can be used in an explosion-hazardous atmosphere where flammable gas or flammable dust exists.

  In many factories that currently have explosion-prone atmospheres, wired explosion-proof telephones, such as paging systems, are used for communication between the factory and outside the factory. In order to prevent explosion accidents that occur, it has an explosion-proof structure and is installed at a specific location such as near a wall. For this reason, when contacting the inside or outside of the factory, it is necessary to go to the place where the telephone is installed one after another, and it is very inconvenient because instructions and work cannot be done on the machine side. In order to eliminate this inconvenience, PHS (Personal Handy-phone System) terminals using TDMA (Time Division Multiple Access) technology are used in an explosion-proof structure.

  However, this PHS terminal has no problem when used only as a mobile communication system for calls, but the frequency and time that can be used per unit is limited, and the maximum communication speed is 128 kbps. There was a problem that large-capacity data communication such as information could not be performed, and the user's request to transmit equipment operation management data and video data to the upper management center could not be satisfied.

  The problem to be solved by the present invention is to provide a high-security telephone capable of performing instructions and work in any place having an explosion-explosive atmosphere and capable of large-capacity data communication, and solves such problems. In the point.

The present invention relates to a mobile phone comprising a power supply battery, a substrate on which an IP telephone control circuit is mounted, an antenna for wireless connection, display means for displaying the control contents of the IP telephone control circuit, and a transmitter. A pressure-resistant transparent substrate that covers a display surface of the display means, and a board on which a handset and a barrier circuit for intrinsically explosion-proofing a plurality of operation keys for operating the handset, the handset, and the IP telephone control circuit are mounted. The main feature is that the substrate is housed in a flameproof case sealed with a light plate, and the substrate on which the plurality of operation keys are arranged is in close contact with the outer surface of the flameproof case.
The IP mobile phone means an IP (Internet Protocol) mobile phone using a CDMA (Code Division Multiple Access) technology.

  In the present invention, since the IP telephone control circuit using the CDMA technology is mounted, it can be easily connected to a network created mainly on the premises for the purpose of computer communication, that is, a LAN (local area network) network. Further, since the system configuration based on IP is a bus network, a telephone can be easily installed or added. In addition, the frequency and time that can be used per CDMA is characterized by the fact that the entire allocated frequency is used, the communication speed is as fast as about 11 Mbps, and large-capacity data communication is possible. Communication with high security can be obtained by the cryptographic system. The entire members constituting the IP portable (wireless) telephone are housed in the explosion-proof case, and an intrinsic safety circuit barrier is installed on the transmitter, receiver, and operation keys arranged along the surface of the explosion-proof case. Therefore, even if the circuit is short-circuited due to external operation, the surrounding atmosphere will not be ignited, and the phone can be used in any place with an explosion-hazardous atmosphere with peace of mind. There is an effect that it is possible to communicate between each other and inside and outside the area.

  In order to provide a high-security phone that can perform instructions and work in any place with an explosion-hazardous atmosphere and is capable of high-capacity data communication, it is equipped with an IP phone control circuit and partly externally. The microphone (speaker) and speaker (receiver) to be exposed and the explosion-proof operation key to expose all to the outside are attached to the pressure-resistant front cover of the explosion-proof case with the viewing-side viewing window hole sealed with a pressure-resistant translucent plate. Barrier circuit for intrinsically safe explosion-proofing of handset and receiver, battery for power supply, IP telephone control circuit, antenna for wireless connection, and pressure-proof explosion-proof case in which display means for displaying control contents of the control circuit is closed by the pressure-proof front cover Realized by storing inside.

  Embodiments of the present invention will be described below with reference to the drawings. 1 is an exploded perspective view of an explosion-proof IP mobile phone according to an embodiment, and FIG. 2 is a circuit diagram of the phone shown in FIG. In FIG. 1, reference numeral 1 denotes openings 1a and 1b for accommodating electronic devices from both sides, a flameproof case body formed of a radio wave transmitting member such as resin or inorganic ceramics, and 2 denotes a resin or inorganic ceramics covering the openings 1a. A rear cover 3 having a battery housing recess 2a, 3 is formed of a radio wave transmitting member such as a resin or inorganic ceramic covering the opening 1b, and has a viewing window hole 3a. 5 is a board on which an intrinsically safe barrier circuit composed of a diode and a resistor is mounted, 6 is an antenna, 7 is a control board on which an IP telephone control circuit is mounted, and 8 is a display equipped with a display screen such as an LCD for displaying control contents , 9 is a high-strength translucent window glass made of tempered glass (may be a high-strength translucent member such as polycarbonate). 0 speaker, 11 microphone, 12 is an input substrate having an array of a plurality of operation keys of explosion-proof structure made of a photo-coupler for input to the control circuit (key sheet).

  The antenna 6 connected to the IP telephone control circuit is arranged on the back surface of the control board 7, the display device 8 connected to the display circuit is fixed on the surface of the control board 7, and the window glass 9 is attached to the display screen of the display device 8. Stick. The opening 1a of the pressure-proof explosion-proof case body 1 is sealed with the rear cover 2, and the battery 4 is stored in the battery storage recess 2a. As shown in FIG. 2, a substrate 5 on which an intrinsically safe barrier circuit that restricts the current flowing in the key sheet 12, the speaker 10, and the microphone 11 is mounted on the rear cover 2 that houses the battery 4 as shown in FIG. And fix it to the explosion-proof case body 1. The board 7 on which the IP telephone controller connected with the antenna 6 is mounted is inserted into the explosion-proof case body 1 with the antenna 6 facing the board 5, and is fixed to the explosion-proof case body 1. Then, the opening 1b of the explosion-proof case body 1 is covered with the front cover 3 to which the speaker 10 and the microphone 11 are attached on the rear surface and the input board on which the operation keys are arranged on the front surface, and the assembly of the explosion-proof IP mobile phone is completed. Note that the front surface of the front cover 3 may be covered with a resin film except for a portion facing the speaker 10 and the microphone 11. Reference numeral 13 shown in FIG. 2 denotes a battery 4 charging circuit.

  3 and 4 show a configuration in which the battery 4 is charged in an explosion-proof manner. FIG. 3 and FIG. 4 (a) show a structure for charging, and FIG. 3 (b) shows a charging circuit thereof. The same or corresponding parts as those in the explosion-proof IP mobile phone shown in FIG. In FIG. 3, 13 is a charging circuit, and 14 is a coil. The coil 14 is sealed in a resin or case 15 and is mounted along the inner surface of the rear cover 2, and the charging circuit 13 is mounted on a resin layer 15 that seals the coil 14. When charging the battery 4, it approaches a resin-sealed power coil connected to an AC power source, electromagnetically couples the power coil and the coil 14, induces a voltage in the coil 14, and the voltage is charged by the charging circuit 13. The battery 4 is charged by rectification.

  In FIG. 4, 13 is a charging circuit similar to the charging circuit shown in FIG. 3, 16 is a condenser lens, 17 is a solar cell, and 18 is a transparent resin layer. The condensing lens 16 is exposed from the rear cover 2, the back surface thereof is covered with a transparent resin layer 18, the solar cell 17 is mounted at a position facing the condensing lens 16 of the transparent resin layer 18, and the charging circuit 13 is The transparent resin layer 18 is attached. When charging the battery 4, external light is captured by the condensing lens 16 and generated by the solar battery 17, and the current is rectified by the charging circuit 13 to charge the battery 4.

1 is an exploded perspective view of an explosion-proof IP mobile phone according to an embodiment of the present invention. FIG. 2 is a schematic circuit diagram of the explosion-proof IP mobile phone shown in FIG. 1. It is sectional drawing which shows the structure of the battery charging part of the explosion-proof IP mobile phone shown in FIG. It is sectional drawing which shows the structure of the other battery charge part of the explosion-proof IP mobile phone shown in FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Explosion-proof case main body 2 Rear cover 3 Front cover 4 Battery 5 Board | substrate which mounted intrinsic | native safety barrier circuit 6 Antenna 7 Control board 8 which mounted IP telephone control circuit Display 9 Window glass 10 Speaker 11 Microphone 12 Input board 13 Charging circuit 14 Coil 15 Resin layer 16 Condensing lens 17 Solar cell 18 Resin layer

Claims (2)

Battery for power supply, board mounted with IP telephone control circuit, antenna for wireless connection, display means for displaying control contents of IP telephone control circuit, transmitter, receiver, transmitter, and Inside a pressure-proof explosion-proof case in which a plurality of operation keys for operating the handset and the IP telephone control circuit are mounted with a substrate on which a barrier circuit for intrinsically safe explosion-proofing is sealed with a pressure-resistant translucent plate covering the display surface of the display means The explosion-proof IP mobile phone is characterized in that a substrate on which the plurality of operation keys are arranged is closely attached to an outer surface of the explosion-proof case. 2. The explosion-proof IP mobile phone according to claim 1, wherein a battery charging circuit using light or electromagnetic coupling as a power source is provided in the pressure-proof explosion-proof case.

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