Image reading device for percisely moving optical components to provide
relatively reduced and magnified images
    63.
    发明授权
    Image reading device for percisely moving optical components to provide relatively reduced and magnified images 失效
    图像读取装置,用于使光学元件精确地移动以提供相对减小和放大的图像

    公开(公告)号:US5585937A

    公开(公告)日:1996-12-17

    申请号:US229715

    申请日:1994-04-19

    摘要: A reading unit for an image reading device includes a lens tube for forming an image of an object and a line sensor for converting the formed image into an electrical signal. A reducing/magnifying mechanism is included for changing the magnification of the image detected by the line sensor. The lens tube is movable such that the optical path length between the lens tube and the line sensor is adjustable to thereby vary magnification of the image. Further, in response to the movement of the lens tube, a movable mirror is adjusted. The mirror is set in a first predetermined position and directs reflected light from the object to the lens tube to shorten the optical path length between the object and the lens tube and thus relatively increase magnification, in response to the lens tube being in a predetermined normal position with a relatively long optical path length between the lens tube and the line sensor. Then, the mirror is set in a second predetermined position and does not direct reflected light from the object to the lens tube to lengthen the optical path between the object and the lens tube and thus relatively decrease magnification, in response to the lens tube being in a predetermined reducing position with a relatively short optical path length between the lens tube and the line sensor. Movement of both the movable mirror and the lens tube are therefore linked together and are each displaced between predetermined positions so as to vary magnification of the image and to prevent distortion in the image read by the line sensor.

    摘要翻译: 用于图像读取装置的读取单元包括用于形成物体的图像的透镜管和用于将形成的图像转换成电信号的线传感器。 包括用于改变由线传感器检测到的图像的放大倍率的缩小/放大机构。 透镜管是可移动的,使得透镜管和线传感器之间的光程长度是可调节的,从而改变图像的放大率。 此外,响应于透镜管的移动,调节可动镜。 将镜子设置在第一预定位置,并将来自物体的反射光引导到透镜管,以缩短物体和透镜管之间的光程长度,从而相对于透镜管处于预定正常状态而相对增加放大率 在透镜管和线传感器之间具有相对长的光程长度的位置。 然后,反射镜被设置在第二预定位置,并且不将来自物体的反射光引导到透镜管,以延长物体和透镜管之间的光路,并且因此相对于透镜管处于相对减小的放大率 在透镜管和线传感器之间具有相对短的光程长度的预定的减小位置。 因此可移动镜和透镜管的移动被连接在一起,并且在预定位置之间移动,以便改变图像的放大率并且防止由线传感器读取的图像的变形。

    Printer having a speed reduction mechanism with integral and
non-integral gear ratios
    64.
    发明授权
    Printer having a speed reduction mechanism with integral and non-integral gear ratios 失效
    具有整体和非整体齿轮比的减速机构的打印机

    公开(公告)号:US5547297A

    公开(公告)日:1996-08-20

    申请号:US431749

    申请日:1995-05-01

    摘要: A printer for printing characters and images on recording paper comprising: a paper cassette for storing the recording paper; a platen roller around which the recorrding paper is wound at the time of the transfer of images for printing; a clamping mechanism for clamping the recording paper between the clamping mechanism and the platen roller; a motor for driving the platen roller through a gear unit; a thermal printing head for transfferring images onto the recording paper; a paper feeding rollers for feeding the recording paper from the paper cassette to the clamper; a paper discharging rollers for discharging the recording paper upon the completion of the transfer of images thereto; and an ink cassette storing an ink sheet inside thereof; in which the clamping mechanism comprises a clamper which is mounted on the platen roller in such a manner as to permit the free movement of the clamper, holds the recording paper by pushing the recording paper onto the platen roller in a first position and also releases the recording paper in a second position.

    摘要翻译: 一种在记录纸上打印字符和图像的打印机,包括:用于存储记录纸的纸盒; 在转印用于印刷的图像时卷绕回收纸的压纸辊; 用于将记录纸夹在夹紧机构和压纸辊之间的夹紧机构; 用于通过齿轮单元驱动压纸滚筒的马达; 用于将图像转印到记录纸上的热敏打印头; 用于将记录纸从纸盒供给到夹持器的送纸辊; 纸张排出辊,用于在图像转印完成时排出记录纸; 以及在其内部存储墨纸的墨盒; 其中夹紧机构包括以允许夹持器自由移动的方式安装在压纸辊上的夹持器,通过在第一位置将记录纸推到压纸辊上来保持记录纸,并且还释放 将纸张记录在第二位置。