| 摘要 |
PURPOSE:To prevent a liquid leak through simple constitution without requiring any auxiliary blade, etc., by uniting projection parts for liquid leak prevention to both ends of a blade easily. CONSTITUTION:A rubber material 12 which constitutes the blade 11 is provided clamping a spring material 13. Each blade 11 is notched at both end parts where the spring plate 13 in the rubber material 12 is not present, and wedges 16 made of rubber materials larger than the diameter of the notched parts 15 are pressed in the notched parts 15. Consequently, both end parts project from a straight front end edge 11-1. Namely, the blade 11 is constituted as mentioned above to form the projection parts 17 at both end parts on the prolongation of the ridge line of the blade itself while maintaining the ridge line. Consequently, a liquid leak is prevented through the extremely simple constitution. |
