JPH03130078U - - Google Patents
Info
- Publication number
- JPH03130078U JPH03130078U JP3601590U JP3601590U JPH03130078U JP H03130078 U JPH03130078 U JP H03130078U JP 3601590 U JP3601590 U JP 3601590U JP 3601590 U JP3601590 U JP 3601590U JP H03130078 U JPH03130078 U JP H03130078U
- Authority
- JP
- Japan
- Prior art keywords
- light
- tape
- section
- light emitting
- prism
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 230000003287 optical effect Effects 0.000 claims description 4
- 238000001514 detection method Methods 0.000 claims description 3
- 238000010586 diagram Methods 0.000 description 3
Description
第１図及び第２図は本考案の一実施例を示すも
ので、第１図はテープ位置検出機構の作用説明図
、第２図はテープカセツトの分解斜視図、第３図
は従来例を示すもので、テープカセツトのドライ
ブ装着時における一部切欠平面図、第４図はプリ
ズムの作用説明図、第５図は他のプリズムの作用
説明図である。
１……テープカセツト、２……ケース、４……
ベースプレート、８……テープ、２２……プリズ
ム、２２ａ……反射面、２２ｂ……射出面、２２
ｃ……反射面、２２ｄ……カツト面、２４……発
光部、２５……受光部、２６……光路。
Figures 1 and 2 show an embodiment of the present invention; Figure 1 is an explanatory diagram of the operation of the tape position detection mechanism, Figure 2 is an exploded perspective view of a tape cassette, and Figure 3 is a conventional example. FIG. 4 is a partially cutaway plan view of the tape cassette when the drive is installed, FIG. 4 is an explanatory diagram of the action of the prism, and FIG. 5 is an explanatory diagram of the action of another prism. 1... Tape cassette, 2... Case, 4...
Base plate, 8...Tape, 22...Prism, 22a...Reflection surface, 22b...Emission surface, 22
c... Reflective surface, 22d... Cut surface, 24... Light emitting section, 25... Light receiving section, 26... Optical path.
Claims (1)
受光部を有するドライブ装置の、前記カセツト装
着部に装着されるテープカセツトのケース内の下
面にプリズムを固定し、 前記発光部の光が前記プリズムの入射面から入
射しその反射面にて反射した後、射出面から出光
し前記受光部に至る光路を構成し、 この光路を横切るテープを前記発光部の光が透
過するか否かによつてテープ位置を検出するテー
プ位置検出機構において、 前記発光部から出光した光が前記プリズム内で
前記光路と異なる経路で反射し前記テープとケー
スとの間隙を通過して前記受光部に侵入すること
を阻止するカツト面を、前記テープに対向する射
出面の前記間隙側の端部に設けたことを特徴とす
るテープカセツトのテープ位置検出機構。[Claims for Utility Model Registration] A prism is fixed to the lower surface inside the case of a tape cassette mounted on the cassette mounting section of a drive device having a light emitting section on the lower surface of the cassette mounting section and a light receiving section on the front surface, The light from the light emitting section enters the prism through the incident surface, is reflected by the reflecting surface, and then exits from the exit surface to form an optical path to the light receiving section, and the light from the light emitting section passes through a tape that crosses this optical path. In the tape position detection mechanism that detects the tape position depending on whether the light is transmitted or not, the light emitted from the light emitting part is reflected within the prism on a path different from the optical path and passes through the gap between the tape and the case. A tape position detection mechanism for a tape cassette, characterized in that a cut surface for preventing the light from entering the light receiving section is provided at the end of the exit surface facing the tape on the gap side.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3601590U JP2503655Y2 (en) | 1990-04-03 | 1990-04-03 | Tape cassette tape position detection mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3601590U JP2503655Y2 (en) | 1990-04-03 | 1990-04-03 | Tape cassette tape position detection mechanism |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH03130078U true JPH03130078U (en) | 1991-12-26 |
| JP2503655Y2 JP2503655Y2 (en) | 1996-07-03 |
Family
ID=31541877
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3601590U Expired - Fee Related JP2503655Y2 (en) | 1990-04-03 | 1990-04-03 | Tape cassette tape position detection mechanism |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2503655Y2 (en) |
-
1990
- 1990-04-03 JP JP3601590U patent/JP2503655Y2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JP2503655Y2 (en) | 1996-07-03 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |