公开(公告)号：US5214833A

公开(公告)日：1993-06-01

申请号：US913195

申请日：1992-07-14

申请人： Shiro Yada

发明人： Shiro Yada

IPC分类号： B21D53/64 ,  B26B19/04

CPC分类号： B21D53/645 ,  B21D53/64 ,  B26B19/044 ,  Y10T29/49799 ,  Y10T29/49982 ,  Y10T29/49984 ,  Y10T29/49996

摘要： An inner cutter for a dry shaver of the present invention includes a plurality of arcuate blades, a plastic frame for supporting the blades, a joint portion for connection with a driving system of the shaver. The arcuate blades are formed from a single piece of a thin metal sheet. The process of forming the blades includes: the step of forming a plurality of arcuate cut edges in the metal sheet such that each span of the cut edges is disposed in parallel with each other, the step of bending the individual arcuate cut edges along the span and normal to the plane of the sheet in order to form the arcuate blades, the step of forming a plurality of recesses in the sheet near the arcuate cut edge for relaxing a shrinkage stress of the plastic frame at the time of the following molding step, the step of molding in the arcuate blades into the plastic frame so as to tightly support the blades, the step of isolating the individual arcuate blades from the metal sheet but supporting the blades only with the plastic frame. Therefore, as the arcuate blades are tightly supported only by the plastic frame, the inner cutter provides excellent shearing performance of hairs without warping the blades when it is reciprocated relative to an outer cutter for shearing hairs. And, there is no problem with respect to cracks of the plastic frame resulted from a shrinkage stress of the plastic.

摘要翻译： 本发明的干式剃须刀用内刀片包括多个弧形刀片，用于支撑刀片的塑料框架，用于与剃须刀的驱动系统连接的接头部分。 弧形刀片由单片薄金属片形成。 形成刀片的过程包括：在金属板中形成多个弧形切割边缘的步骤，使得切割边缘的每个跨度彼此平行地设置，沿着跨度弯曲各个弧形切割边缘的步骤 并且垂直于片材的平面以形成弓形刀片，在靠近弓形切割边缘的片材中形成多个凹部以减轻在随后的模制步骤时塑性框架的收缩应力的步骤， 将弓形叶片成型为塑料框架以便紧密地支撑叶片的步骤，将单独的弧形叶片与金属板隔离但仅用塑料框架支撑叶片的步骤。 因此，由于弓形叶片仅由塑料框架紧密地支撑，所以内刀片相对于用于剪切毛发的外刀片往复运动而提供优异的毛发剪切性能而不使叶片翘曲。 并且，由于塑料的收缩应力引起的塑料框架的裂纹没有问题。

公开(公告)号：US4837929A

公开(公告)日：1989-06-13

申请号：US152304

申请日：1988-02-04

申请人： Masao Tanahashi ,  Shiro Yada

发明人： Masao Tanahashi ,  Shiro Yada

IPC分类号： B26B19/04 ,  B26B19/38

CPC分类号： B26B19/3853 ,  B26B19/38 ,  B26B19/386

摘要： A dry shaver has a readily replaceable head frame supporting an outer shearing foil. The head frame is of a generally rectangular configuration with a pair of opposed end walls between which an inner cutter assembly projects from a shaver housing for shearing engagement with the undersurface of the shearing foil. Each of the end wall is integrally formed with a hook for locked engagement with a corresponding stop on the part of the housing to retain the head frame on the top of the housing. Also formed integrally on each of the end walls is a release lever which is capable of resiliently flexing in a direction of disengaging the adjacent hook form the stop, permitting the removal of the head frame. With the provision of forming the release lever on the head frame together with the hook, the removable of the head frame can be made simply by pressing the release levers while holding the head frame itself by the same fingers of the user, greatly enhancing the convenience of replacing the head frame together with the shearing foil.

摘要翻译： 干式剃须刀具有支撑外剪切箔的容易更换的头架。 头框架具有大致矩形的构造，其具有一对相对的端壁，内切割器组件在其之间从剃须刀外壳突出以与剪切箔的下表面剪切接合。 每个端壁一体地形成有钩，用于与壳体的一部分上的对应止动件锁定接合，以将头框架保持在壳体的顶部上。 在每个端壁上一体地形成有释放杆，该释放杆能够沿着使相邻的钩形成止动件的方向弹性地弯曲，从而允许头部框架的移除。 随着与钩一起在头架上形成释放杆，可以简单地通过按压释放杆，同时用使用者的手指将头架自身保持在一起，从而大大提高了方便性 将头架与剪切箔一起更换。