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Radial vane for tooth brush, tooth brush using the same, and method and device for manufacturing the radial vane for the tooth brush

US-7992246-B2

Abstract

In a 360-degree toothbrush in which a brush head is formed by superposing disk-shaped radial vanes 1 in an axial direction, the arranging pitch of the radial vanes 1 is increased so as to make the bristle density appropriate. Spacers are not used between the radial vanes 1 so as to increase the productivity, and to improve the hygiene condition. In order to realize these aspects, an annular protrusion or protrusions 3 are formed on one or both of the surfaces of an annular weld portion 2 of the radial vane 1 . The annular protrusion 3 is formed at the same time when forming the weld portion 2 in a welding step in which the bristle bundle is opened radially and the center part is welded so that the radial vane 1 is manufactured.

Patent figures（8）

US-7992246-B2 figure 1
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US-7992246-B2 figure 2
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US-7992246-B2 figure 3
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