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录像机是一种高技术产品,每台主要零部件约有2500个,其中机芯零部件约有250～300个,每台机芯上用电机3～4台。录像机的机械尺寸精度达微米级,如磁头间隙只有0.3±0.03微米,直接驱动型磁鼓的关键精度为1～2微米,磁鼓旋转精度达99.999％,录像机电机的定子轴承孔精度比一般产品的要求高一个数量级。日本的录像机及电机已经实现了自动化大批量生产,成为一大支柱产业。据介绍,87年世界录像机产量为4240万台,仅日本松下公司就生产了900万台,而日本的录像机普及率已达60％。
The VCR is a high-tech product. There are about 2,500 main components and parts, including about 250 to 300 movement parts and 3 to 4 motors per movement. The mechanical dimension accuracy of the video recorder is up to micron level, such as head gap is only 0.3±0.03 micron, the key precision of the direct drive drum is 1 to 2 micrometers, the precision of the drum rotation is 99.999%, and the accuracy of the stator bearing hole of the video recorder motor is higher than that of general products. The demand is an order of magnitude higher. Japan’s video recorders and motors have achieved automation in mass production and become a pillar industry. According to reports, the output of the world’s video recorders was 42.4 million units in the year of 87. Only Panasonic Corporation of Japan produced 9 million units, and the penetration rate of video recorders in Japan reached 60%.