| 摘要 |
An automatic ventilation device for chairs uses a moveable plate that moves upwards and downwards along with a cushion, arranged under the cushion. A reset spring for returning is disposed on the removable plate. The upper side and lower side of the removable plate having a stretchable air bag respectively. When the removable plate moves upwards and downwards, one air bag is extended while the other is compressed, working in opposite way. The. upper and lower air bags have one-way air inlets and outlets respectively while the air outlets are connected to the chair cushion and the chair back. Therefore, when the cushion moves due to the movement of users or driving over broken country, the moveable plate moves upwards and downwards synchronously so as to compress one of the upper or lower air bags for blowing air to the chair cushion and chair back continuously. Thus under the condition of energy saving-without a power unit, the device has a cooling effect and makes users comfortable.
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