| 摘要 |
A manually operated flow control device has a frame with a first part and a second part connected to one another for relative motion alternately towards and away from one another along a line of action. A flow guide is connected to the frame, while a flow modification component is mounted to the frame and is operatively connected to the flow guide for changing a state of flow through the flow guide in accordance with relative positions of the first part and the second part along the line of action. A structure is provided on the frame for enabling a user to hold the frame by exerting a first compressive force on the frame along the line of action between a selected finger of the user, on one side, and a palm surface of the user, on another side, and for further enabling the user to actuate the flow actuation component by exerting a second compressive force on the frame along the line of action between the selected finger and the palm surface, the second compressive force being larger than the first compressive force. The structure for enabling the holding of the frame and the actuation of the flow modification component includes a seat on the frame for receiving or engaging the selected finger so as to resist sliding of the frame off of the selected finger. |
