Toothbrush
AssigneePigeon Corporation
InventorsYuichi Nakata, Tadayoshi Murakami
Life of this patent
Estimating the term…
Abstract
A toothbrush having a handle and a rubber-like brushing structure having a plurality of brushing projections and mounted on the forward part of the handle is further provided with a rigid frame member surrounding the side surface of the brushing structure and engaged with the latter in a projection-and-recess relation, the frame member being bonded to the handle for indirectly securing the brushing structure to the handle, and the "hardness" in operation of the toothbrush, i.e., the brushing projections, being adjusted by varying the height of the frame member measured perpendicularly to the lengthwise direction of the handle.
Claims3
A toothbrush for infants and young children, which comprises a rigid handle having one end for attachment of a brush structure thereto and defining a recess to the one end, a brush structure having a plurality of projections extending substantially parallel to one another, made of a soft resilient rubber-like material and attached to one end of the handle with the projections projecting therefrom, and a rigid frame member fixedly located in the recess and defining an opening supporting the periphery of brush structure adjacent the one end of the handle to an extent to provide a desired restraint against bending of the projections, thereby to provide the brush structure with a desired stiffness wherein said brush structure has an anchoring part, and a core groove formed internally of the anchoring part, and said handle is formed on a surface at the forward end thereof with a groove for receiving the anchoring part and a core projection to be inserted into the core groove in the brush structure.
Dependencies are inferred from the claim text.