| 摘要 |
<p>A handgrip with a built-in heater for a motorcycle constituted by a hollow cylindrical handgrip body, wherein a flexible printed circuit heater is wound around an outer periphery of a synthetic resin inner piece of a substantially hollow cylindrical shape with a hollow cylindrical or peripheral portion slotted, and a cladding rubber layer is integrally molded thereon to cause the heater to extend between the inner piece and the cladding rubber layer. The heater is wound over a range covering a half circumference or more but less than a full circumference of the inner piece. The cladding rubber layer is molded in such a form that a region where the heater is not wound faces parting positions of mold halves for forming the cladding rubber layer so as to prevent the occurrence of turn-ups and creases. In addition, an outer peripheral portion of the inner piece facing the parting positions is chamfered, whereby the thickness of the cladding rubber layer at a chamfered portion is made large to force any crease which occurs to be formed in the chamfered portion of the heater.</p> |
