| 摘要 |
The keyboard (1) primarily serves for input of data or control signals into an electronic measuring instrument and/or a computing device and includes a keyboard panel (10), a number of pushbutton switch elements (13, 14) arranged under the keyboard and having manually controlled ends (131, 141) that extend upwards through openings (11, 12) in the keyboard panel, and sealing means (15, 17; 16, 18) to prevent penetration of water through the openings (11, 12) of the keyboard panel (10); for this purpose, the openings (11, 12) of the keyboard panel (10) are provided with sealingly effective inserts in the form of resiliently elastic hollow capsules (15, 16) that project upward from the keyboard panel (10), each capsule having a substantially hollow cylindrical neck section (152, 162) at the lower capsule end, an adjacent deforming section (153, 163) and a keying area section (154, 164) at the upper capsule end; the deforming section (153, 163) of the capsules (15, 16) forms an elastic shape-restoring bulge (155, 165) whose outer diameter is greater than the outer diameter of the associated neck section (152, 162); each capsule (15, 16) is pressed at its neck section region (152, 162) radially against the inner surface (111, 121) of the associated substantially circular opening (11, 12) of said keyboard panel (10) by an essentially rigid and substantially hollow cylindrical element) 17, 18). |
