Tape cassette of high transparency material
AssigneeVictor Company of Japan, Ltd.
InventorsShigeru Ishikawa, Hiroyuki Umeda, Hisashige Fujiwara, Yasufumi Hashimoto
Life of this patent
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Abstract
In a tape cassette having sensor optical path holes provided on respective wall portions on a straight line coupling a position of a light emission element with a position of a light reception element so that light from the light emission element is introduced into a tape container and light passing through a tape running path of the tape container comes out of the tape container and reaches a light reception element, a light shielding member having a light shielding effect is bonded around a sensor optical path hole right after the light from the light emission element comes out of the tape container.
Claims15
A tape cassette having a pair of reels rotatably provided in a pair of tape containers, respectively, a tape being wound around the pair of reels and contained in the pair of tape containers, the tape consisting of a magnetic recording layer tape part and high light transmittance leader tape parts added to both ends of the tape, respectively, and having sensor optical path holes provided on wall portions, respectively, on a straight line coupling a position of a light emission element of a recording and reproducing apparatus with a position of a light reception element of the recording and reproducing apparatus so that light from said light emission element is introduced into said tape containers and light passing through tape running paths of said tape containers comes out of said tape containers and reaches said light reception element while the tape cassette is installed into the recording and reproducing apparatus, wherein
- a light shielding portion having a light shielding effect is provided around at least one of said sensor optical path hole right after the light from said light emission element comes out of one of said tape containers and next said sensor optical path hole.
A tape cassette having a pair of reels rotatably provided in a pair of tape containers, respectively, a tape being wound around the pair of reels and contained in the pair of tape containers, the tape consisting of a magnetic recording layer tape part and high light transmittance leader tape parts added to both ends of the tape, respectively, and having sensor optical path holes provided on wall portions, respectively, on a straight line coupling a position of a light emission element of a recording and reproducing apparatus with a position of a light reception element of the recording and reproducing apparatus so that light from said light emission element is introduced into said tape containers, light passing through tape running paths of said tape containers comes out of said tape containers, passes through a cover lock container and reaches said light reception element while the tape cassette is installed into the recording and reproducing apparatus, wherein
- a cylindrical protrusion having a light shielding effect is provided at a cover lock member arranged in said cover lock container, and a sensor optical path hole arranged on the straight line coupling the position of said light emission element with the position of the light reception element is provided at the cylindrical protrusion while said cover lock member is at an unlock position.
A tape cassette having a pair of reels rotatably provided in a pair of tape containers, respectively, a tape wound around the pair of reels and contained in the pair of tape containers, the tape consisting of a magnetic recording layer tape part and high light transmittance leader tape parts added to both ends of the tape, respectively, and having sensor optical path holes provided on wall portions on a straight line coupling a position of a light emission element of a recording and reproducing apparatus with a position of a light reception element of the recording and reproducing apparatus so that light from said light emission element is introduced into said tape containers and light passing through tape running paths of said tape containers comes out of said tape containers and reaches said light reception element while the tape cassette is installed into the recording and reproducing apparatus, wherein
- at least one of an upper flange and a lower flange of each of said pair of reels is formed out of a reflection light attenuating material and a reflection light attenuating color.
A tape cassette provided with a light emission portion and a light reception portion for receiving detection light from the light emission part at an apparatus side, an optical path of the detection light reaching said light reception portion from said light emission portion set to pass a cassette position, and used with an apparatus for detecting presence and absence of the tape cassette depending on whether the detection light from said light emission portion reaches said light reception portion, wherein
- a cassette case is formed out of a high transparency material, and a prism portion for refracting or reflecting incident light in an emission direction in which the incident light does not reach said light reception portion is provided at a position of the cassette case on the optical path of said detection light.
A tape cassette provided with a light emission portion for cassette presence and absence detection and a light reception portion for cassette presence and absence detection receiving detection light from the light emission part at an apparatus side, an optical path of the detection light reaching said light reception portion from said light emission portion set to pass a cassette position, and used with an apparatus for detecting presence and absence of the tape cassette depending on whether the detection light from said light emission portion reaches said light reception portion, and provided with a light emission portion for cassette end detection and a light reception portion for cassette end detection receiving detection light from the light emission portion at an apparatus side, and used with an apparatus for detecting presence and absence of a tape end depending on whether the detection light from said light emission portion reaches said light reception portion, wherein
- a light shielding member is provided on an optical path for tape end detection to block passage of unnecessary light deviated from the optical path;
- and said light shielding member is extended and an extended portion of the light shielding member is arranged on an optical path for cassette presence and absence detection.
A tape cassette used with an apparatus for detecting a tape terminal end depending on whether tape end detection light from a light emission portion reaches a light reception portion, wherein
- a prism portion for refracting or reflecting the tape end detection light from the light emission portion in an emission direction in which the light does not reach the light reception portion, is provided on a wall around an optical path notch through which the tape end detection light passes.
A tape cassette provided with two light emission portions for cassette presence and absence detection and two light reception portions for cassette presence and absence detection receiving detection lights from the light emission portions at an apparatus side, first and second optical paths of first and second detection lights reaching said light reception portions from said light emission portions, respectively, set to pass a cassette position, and used with an apparatus for detecting presence and absence of the tape cassette depending on whether the first detection light and second detection light from said respective light emission portions reach said respective light reception portions;
- and provided with two light emission portions for tape end detection and two light reception portions for tape end detection receiving detection lights from the light emission portions at an apparatus side, third and fourth optical paths of third and fourth detection lights reaching said light reception portions from said light emission portions, respectively, set to pass the tape position, and used with an apparatus for detecting presence and absence of a tape end depending on whether said third detection light and fourth detection light from said light emission portions reach said respective light reception portions, wherein
- a cassette case is formed out of a high transparency material;
- prism portions for refracting or reflecting said first and second detection lights for cassette presence and absence detection in a direction in which the first detection light and second detection light do not reach said respective light reception portions, are provided at positions of the cassette case on first and second optical paths of the first and second lights for cassette presence and absence detection, respectively;
- and light shielding members are provided on third and fourth optical paths of third and fourth lights for tape end detection to block passage of unnecessary light deviated from the third and fourth optical paths, respectively.
A tape cassette provided with two light emission portions for cassette presence and absence detection and two light reception portions for cassette presence and absence detection receiving detection lights from the light emission portions at an apparatus side, first and second optical paths of first and second detection lights reaching said light reception portions from said light emission portions, respectively, set to pass a cassette position, and used with an apparatus for detecting presence and absence of the tape cassette depending on whether the first detection light and second detection light from said respective light emission portions reach said respective light reception portions;
- and provided with two light emission portions for tape end detection and two light reception portions for tape end detection receiving detection lights from the light emission portions at an apparatus side, third and fourth optical paths of third and fourth detection lights reaching said light reception portions from said light emission portions, respectively, set to pass the tape position, and used with an apparatus for detecting presence and absence of a tape end depending on whether said third detection light and fourth detection light from said light emission portions reach said respective light reception portions, wherein
- a cassette case is formed out of a high transparency material;
- a prism portion for refracting or reflecting said first detection light for cassette presence and absence detection in a direction in which the first detection light does not reach said light reception portion, is provided at a position of the cassette case on a first optical path of the first detection light;
- a first light shielding member is provided on a second optical path of the second detection light for cassette presence and absence detection, a second light shielding member is provided on a third optical path of the third detection light for tape end detection to block unnecessary light deviated from said third optical path;
- and a third light shielding member is provided on a fourth optical path of the fourth detection light for tape end detection to block unnecessary light deviated from said fourth optical path.
Dependencies are inferred from the claim text.