US 4,833,726 AGranted

Helmet with two-way radio communication faculty

AssigneeNGK Insulators, Ltd.

InventorsKatsuro Shinoda, Toshiyuki Kawaguchi, Hiroyuki Katsukawa, Naoki Tanaka

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Abstract

A helmet with two-way radio communication faculty including a cap-like outer shell made of hard and electrically insulating plastic material, a cap-like shock absorbing member arranged within the outer shell, an ear-pad member secured to one side edge of the outer shell, a transmitter unit arranged in a top recess formed in an outer surface of the shock absorbing member at its top portion, a receiver unit arranged on an inner surface of the ear-pad member, a battery unit arranged in a side recess formed in the outer surface of the shock absorbing member at its side which is opposite to a side on which the ear-pad member is secured to the outer shell, a transmitting dipole antenna made of a metal foil secured on an inner surface of the outer shell at its one side with the aid of an electrically insulating adhesive tape, and a receiving dipole antenna made of a metal foil secured on the inner surface of the outer shell at its other side with the aid of an electrically insulating adhesive tape.

Claims41

Dependent claims

A helmet with two-way radio communication faculty, comprising:

a cap-like outer shell made of hard and electrically insulating material;
an ear-pad member made of hard and electrically insulating material and secured to a side edge of said outer shell;
a cap-like shock absorbing member made of electrically insulating and shock absorbing material, said shock absorbing member being arranged within said outer shell and having a plurality of recesses formed in an outer surface thereof;
a sound converting means for converting sound into an audio signal;
a transmitter unit for converting said audio signal into a high frequency signal;
a transmitting antenna for transmitting said high frequency signal as electromagnetic waves;
a receiving antenna for receiving electromagnetic waves transmitted from other transmitting antennas to regenerate a high frequency signal therein;
a receiver unit for receiving said high frequency signal regenerated in said receiving antenna and generating an audio signal;
a sound reproducing means for receiving said audio signal generated by said receiver unit and reproducing sound;
and
a battery unit for energizing said transmitter unit and receiver unit;
whereby one of said transmitter unit, receiver unit and battery unit is provided on an inner surface of said ear-pad member and the remaining units are arranged separately in said recesses formed in the outer surface of the shock absorbing member, and said transmitting antenna and receiving antenna are secured to an inner surface of said outer shell at side portions opposite to each other.

9 more elements

A two-way radio communication system with a helmet having a hard and electrically insulating outer shell and a hard and electrically insulating ear-pad member secured to one side edge of the outer shell, comprising:

a housing means for accommodating a transmitter unit, a receiver unit, a battery unit, a transmitting antenna and a receiving antenna, said battery unit electrically coupled to said transmitter and receiver units, said transmitting antenna and receiving antenna being secured to an inner surface of said outer shell;
a sound reproducing means arranged on an inner surface of the ear-pad member for generating sound;
a sound collecting means secured to the helmet for collecting sound;
a first communication cable means for coupling the sound reproducing means with the receiver unit;
and
a second communicating cable means for coupling the sound collecting means with the transmitter unit;
wherein said sound collecting means comprises a sound collecting piece and a hollow tube having one end coupled with said sound collecting piece and the other end secured to said ear-pad member, and said second communication cable means comprises a second flexible tube having one end communicated with the other end of said hollow tube and the other end coupled with a microphone provided in said housing means.

4 more elements

Dependencies are inferred from the claim text.