| 摘要 |
PURPOSE: A headphone with an air room is provided to improve a contact characteristic and prevent a leakage of sound by controlling an expanding degree of an air tube. CONSTITUTION: A speaker is installed in an inside of a main body(100). A hair band(130) is connected with the main body(100). A projection(130) is projected from the main body(100). A headphone contact portion(200) is fixed to the main body(100). A projected groove(220) is formed at one side of an air tube(210). An air supply portion(300) is used for supplying air to the air tube(210). An injection tube(310) is connected with the air tube(210). An air room(320) is installed in the inside of the main body(100). The injection tube(310) is connected with the air room(320) by inserting an anti-counterflow valve(330) into the air room(320). A pump(340) is connected with the air room(320). An operating knob(360) having an external air injection hole(350) is connected to the pump(340). A pressure control portion(400) is used for controlling a pressure of the air tube(210). The pressure control portion(400) is an operating bar(410), a spring(420), and an operating knob(430).
|
