Indicator member, indicator unit and indicator instrument

Abstract

[Problem to be solved] To provide an inexpensive indicator member which can prevent a dark area from being formed at a location above a reflection part, an indicator unit having the indicator member and an indicator instrument having the indicator unit. [Solution to Problem] A hollow reflection part provided to an indicator part of an indicator main body of a light-emitting indicator includes a plurality of partial reflection parts having at least an pointing direction reflection face, a rear end direction reflection face and a corner formed at an intersection of the pointing direction reflection face and the rear end direction reflection face and arranged at a location opposed to the base part. The corners of the respective partial reflection parts adjacent to each other are displaced in a pointing direction or in a rear end direction.

1 . An indicator member made of translucent material and having
 a base part arranged to receive light from a light source,   an indicator part extending from one end of the base part to each of a pointing direction and a rear end direction opposite of the pointing direction, and   a reflection part provided at the indicator part and arranged at a location opposed to the base part so as to reflect the light received at the base part toward the pointing direction and the rear end direction,   wherein the reflection part includes a plurality of partial reflection parts arranged in parallel in a widthwise direction of the indicator part,   wherein each of the plurality of partial reflection parts includes at least
 a pointing direction reflection face arranged to reflect a part of the light received at the base part toward the pointing direction and transmit another part of the light, 
 a rear end direction reflection face connected to the pointing direction reflection face in an intersecting fashion and arranged to reflect a part of the light received at the base part toward the rear end direction and transmit another part of the light, and 
 a corner formed at an intersection of the pointing direction reflection face and the rear end direction reflection face and arranged at a location opposed to the base part, and 
   wherein the corners of the respective partial reflection parts located adjacent to each other are displaced in the pointing direction or the rear end direction.   
     
     
         2 . The indicator member according to  claim 1 , wherein the reflection part is formed symmetric about a widthwise center of the indicator part. 
     
     
         3 . The indicator member according to  claim 1 ,
 wherein the reflection part includes a first partial reflection part, a second partial reflection part and a third partial reflection part,   wherein the corner of the first partial reflection part and the corner of the third reflection part are displaced in the same fashion toward the rear end direction with respect to a center of the base part, and   wherein the corner of the second partial reflection part is relatively displaced toward the pointing direction with respect to the corner of the first reflection part and the corner of the third reflection part.   
     
     
         4 . An indicator unit comprising,
 the indicator member described in  claim 1 , and   a cover member arranged to cover the indicator part of the indicator member and having a slit though which the light from an upper face of the indicator part facing an opposite direction of the base part is passed.   
     
     
         5 . An indicator instrument comprising,
 the indicator unit described in  claim 4 ,   a drive device arranged to rotate an indicator shaft to which the indicator unit is attached in accordance with measured quantity, and   a light source which emits light to be received at the indicator member of the indicator unit.   
     
     
         6 . An indicator member made of translucent material and having
 a base part arranged to receive light from a light source,   an indicator part extending from one end of the base part to each of a pointing direction and a rear end direction opposite of the pointing direction, and   a hollow reflection part provided in the indicator part and arranged at a location opposed to the base part so as to reflect the light received at the base part toward the pointing direction and the rear end direction,   wherein the hollow reflection part includes
 a pointing direction reflection face arranged to reflect a part of the light received at the base part toward the pointing direction and transmit another part of the light, 
 a rear end direction reflection face connected to the pointing direction reflection face in an intersecting fashion and arranged to reflect a part of the light received at the base part toward the rear end direction and transmit another part of the light, and 
 a transmission face connected to each of the pointing direction reflection face and the rear end direction reflection face in an intersecting fashion and arranged to face an upper face of the indicator part, and 
   wherein the transmission face is formed into a convexly curved surface which is convex toward the upper face of the indicator part from one end connected to the pointing direction reflection face to another end connected to the rear end direction reflection face.   
     
     
         7 . An indicator unit comprising,
 the indicator member described in  claim 6 , and   a cover member arranged to cover the indicator part of the indicator member and having a slit through which the light from an upper face of the indicator part facing an opposite direction of the base part is passed.   
     
     
         8 . An indicator instrument comprising,
 the indicator unit described in  claim 7 ,   a drive device arranged to rotate an indicator shaft to which the indicator unit is attached in accordance with measured quantity, and   a light source which emits light to be received at an indicator member of the indicator unit.   
     
     
         9 . An indicator member made of translucent material and having
 a base part arranged to receive light from a light source,   an indicator part having a pointing part extending from one end of the base part to a pointing direction and a rearward part extending to a rear end direction opposite of the pointing direction, and   a hollow reflection part provided in the indicator part and arranged at a location opposed to the base part so as to reflect the light received at the base part toward the pointing direction and the rear end direction,   wherein the hollow reflection part includes
 a pointing direction reflection face arranged to reflect a part of the light received at the base part toward the pointing direction and transmit another part of the light, 
 a rear end direction reflection face connected to the pointing direction reflection face in an intersecting fashion and arranged to reflect a part of the light received at the base part toward the rear end direction and transmit another part of the light, and 
 a transmission face connected to each of the pointing direction reflection face and the rear end direction reflection face in an intersecting fashion, 
   wherein a notch is provided at a bottom face of the pointing part facing the base part, and   wherein the notch includes an upward reflection face arranged to reflect light reflected by the pointing direction reflection face toward a section of the upper face of the pointing part at opposite side of the bottom face, the section being adjacent to the hollow reflection part.   
     
     
         10 . An indicator unit comprising,
 the indicator member described in  claim 9 , and   a cover member arranged to cover the indicator part of the indicator member and having a slit through which the light from the upper face of the indicator part is passed, the upper face of the indicator part including an upper face of the pointing part.   
     
     
         11 . An indicator instrument comprising,
 the indicator unit described in  claim 10 ,   a drive device arranged to rotate an indicator shaft to which the indicator unit is attached in accordance with measured quantity, and   a light source which emits light to be received at the indicator member of the indicator unit.   
     
     
         12 . An indicator member made of translucent material and having
 a base part including a shaft receiving part attached to an end of an indicator shaft arranged to guide light from a light source, the base part being arranged to receive the light guided in the indicator shaft,   a pointing part extending from one end of the base part to a pointing direction, and   a pointing direction reflection face arranged at the pointing part adjacent to the base part so as to reflect the light received at the base part toward a distal end of the pointing part,   wherein a reflection part for indicator shaft is formed continuously from the base part to the pointing part so as to reflect light heading from the indicator shaft to outside of the base part toward an upper face of the pointing part adjacent to the pointing direction reflection face.   
     
     
         13 . The indicator member according to  claim 12 , wherein the reflection part for indicator shaft includes
 a light guard part formed continuously from the base part to the pointing part and arranged to guide the light heading from the indicator shaft to outside of the base part, and   a reflection face for indicator shaft arranged to reflect the light guided in the light guard part toward the upper face of the pointing part adjacent to the pointing direction reflection face.   
     
     
         14 . The indicator member according to  claim 12 , comprising
 a rearward part extending from one end of the base part to a rear end direction opposite of the pointing direction, and   a rear end direction reflection face provided at the rearward part adjacent to the base part so as to reflect the light received at the base part toward the rearward part,   wherein the reflection part for indicator shaft is formed continuously from the base part to the rearward part so as to reflect light heading from the indicator shaft to outside of the base part toward an upper face of the rearward part adjacent to the rear end direction reflection face.   
     
     
         15 . An indicator member made of translucent material and having
 a base part including a shaft receiving part attached to an end of an indicator shaft arranged to guide light from a light source, the base part being arranged to receive the light guided in the indicator shaft,   a pointing part extending from one end of the base part to a pointing direction,   a rearward part extending from the one end of the base part to a rear end direction opposite of the pointing direction,   a pointing direction reflection face arranged at the pointing part adjacent to the base part so as to reflect the light received at the base part toward a distal end of the pointing part, and   a rear end direction reflection face provided at the rearward part adjacent to the base part so as to reflect the light received at the base part toward the rearward part,   wherein a reflection part for indicator shaft is formed continuously from the base part to the rearward part so as to reflect light heading from the indicator shaft to outside of the base part toward an upper face of the rearward part adjacent to the rear end direction reflection face.   
     
     
         16 . The indicator member according to  claim 12 , wherein the reflection part for indicator shaft includes a plurality of partial reflection faces aligned in a widthwise direction of the indicator member. 
     
     
         17 . An indicator unit comprising,
 the indicator member described in  claim 12 , and   a cover member arranged to cover the indicator member and having a slit through which the light from an upper face of the indicator member is passed.   
     
     
         18 . The indicator unit according to  claim 17 , wherein the reflection part for indicator shaft of the indicator member includes a reflection face for slit projecting from the base part to the widthwise direction of the indicator member so as to reflect light heading from the indicator shaft to an inner face of the cover member toward a slit of the cover member adjacent to the pointing direction reflection face. 
     
     
         19 . An indicator unit comprising an indicator member made of translucent material and a cover member,
 wherein the indicator member includes
 a base part including a shaft receiving part attached to an end of an indicator shaft arranged to guide light from a light source, the base part being arranged to receive the light guided in the indicator shaft, 
 a pointing part extending from one end of the base part to a pointing direction, and 
 a pointing direction reflection face arranged at the pointing part adjacent to the base part so as to reflect the light received at the base part toward a distal end of the pointing part, 
   wherein the cover member is arranged to cover the indicator member and having a slit through which the light from an upper face of the indicator member is passed, and   wherein the indicator unit further comprises a reflection face for slit projecting from the base part to a widthwise direction of the indicator member so as to reflect light heading from the indicator shaft to an inner face of the cover member toward a slit of the cover member adjacent to the pointing direction reflection face.   
     
     
         20 . The indicator unit according to  claim 19 , wherein the indicator member includes
 a rearward part extending from one end of the base part to a rear end direction opposite of the pointing direction, and   a rear end direction reflection face provided at the rearward part adjacent to the base part so as to reflect the light received at the base part toward the rearward part,   wherein the reflection face for slit is arranged to reflect light heading from the indicator shaft to the inner face of the cover member toward a slit of the cover member adjacent to the rear end direction reflection face.   
     
     
         21 . An indicator instrument comprising,
 the indicator unit described in  claim 17 ,   a drive device having the indicator shaft to which the indicator unit is attached, the drive device being arranged to rotate the indicator shaft in accordance with measured quantity, and   a light source which emits light to be guided in the indicator shaft of the drive device.