公开(公告)号：US5915822A

公开(公告)日：1999-06-29

申请号：US908711

申请日：1997-08-08

申请人： Akihiro Ogura ,  Masanori Tone ,  Kazuo Arai ,  Tetsuhide Takeyama ,  Toshitaka Higuchi

发明人： Akihiro Ogura ,  Masanori Tone ,  Kazuo Arai ,  Tetsuhide Takeyama ,  Toshitaka Higuchi

IPC分类号： G01D11/28 ,  G01D13/28

CPC分类号： B60K37/02 ,  G01D11/28 ,  G01D13/28 ,  G02B3/08 ,  B60K2350/203 ,  Y10S385/901

摘要： A transmitted illumination type meter comprises a transparent light transmitting board having both a light entering bore and a shaft passing bore formed therethrough; a translucent dial plate placed on a front surface of the board, the dial plate having a shaft passing opening mated with the shaft passing bore of the board; a movement positioned behind the board; a light source positioned within the light entering bore; a drive shaft extending from the movement to the outside of the dial plate through the shaft passing bore and the shaft passing opening; a transparent pointer connected to the drive shaft to move over a front surface of the dial plate; and an annular convex peripheral wall defining the light entering bore. The annular convex peripheral wall allows light beams from the light source to enter the board and travel in parallel in the same. A plurality of stepped annular light reflecting surfaces are formed on a rear surface of the board and arranged to be concentric with the light entering bore. The annular light reflecting surfaces reflect the light beams from the annular convex peripheral wall toward the front surface of the light transmitting board. A Fresnel lens is formed on the front surface of the board and arranged to be concentric with the light entering bore. The Fresnel lens projects the light beams from the annular light reflecting surfaces toward the dial plate.

摘要翻译： 透射照明型计量器包括具有光进入孔和穿过其形成的轴通孔的透明透光板; 位于所述板的前表面上的半透明表盘，所述表盘具有与所述板的轴通孔相配合的轴的开口; 位于板后面的运动; 位于所述光进入孔内的光源; 驱动轴，其通过轴通孔和轴通过开口从运动件延伸到表盘的外部; 连接到所述驱动轴以在所述表盘的前表面上移动的透明指针; 以及限定光进入孔的环形凸周壁。 环形凸周壁允许来自光源的光束进入板并在其中平行行进。 多个台阶环形光反射表面形成在板的后表面上并且被布置成与光进入孔同心。 环形光反射表面将来自环形凸周壁的光束反射到透光板的前表面。 菲涅耳透镜形成在板的前表面上，并被布置成与光进入孔同心。 菲涅尔透镜将来自环形光反射表面的光束投射到表盘。