JPH0225867U - - Google Patents
Info
- Publication number
- JPH0225867U JPH0225867U JP10374488U JP10374488U JPH0225867U JP H0225867 U JPH0225867 U JP H0225867U JP 10374488 U JP10374488 U JP 10374488U JP 10374488 U JP10374488 U JP 10374488U JP H0225867 U JPH0225867 U JP H0225867U
- Authority
- JP
- Japan
- Prior art keywords
- impeller
- blades
- slits
- detection device
- frequency detection
- 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.)
- Pending
Links
- 238000001514 detection method Methods 0.000 claims description 6
- 230000005540 biological transmission Effects 0.000 claims 1
- 230000000903 blocking effect Effects 0.000 claims 1
Landscapes
- Photometry And Measurement Of Optical Pulse Characteristics (AREA)
- Optical Transform (AREA)
Description
第１図および第２図は本考案に係る周波数検出
装置の実施例を示しており、第１図は正面図、第
２図は側面図、第３図は本考案の実施例を施こし
たサーマルプリンタの要部を示す斜視図、第４図
は従来の周波数検出装置を示す正面図、第５図は
第４図の側面図である。
１０…サーマルプリンタ、１４…歯車、１５…
モータ、１６…回転軸、１７…周波数検出装置、
１８…羽根車、１９…羽根、２０…スリツト、２
１…フオトセンサ、２１Ａ…発光部、２１Ｂ…受
光部、Ｐ…用紙。
1 and 2 show an embodiment of the frequency detection device according to the present invention, FIG. 1 is a front view, FIG. 2 is a side view, and FIG. 3 is an embodiment of the frequency detection device according to the present invention. FIG. 4 is a front view showing a conventional frequency detection device, and FIG. 5 is a side view of FIG. 4. 10...Thermal printer, 14...Gear, 15...
Motor, 16... Rotating shaft, 17... Frequency detection device,
18...impeller, 19...blade, 20...slit, 2
1... Photo sensor, 21A... Light emitting section, 21B... Light receiving section, P... Paper.
Claims (1)
を交互に形成してなる羽根車を回転軸に取付け、
前記羽根およびスリツトによる光の遮断および透
過を検出する光検出器を羽根車に対向するように
設けてなる周波数検出装置において、前記羽根車
の円周方向における羽根の幅とスリツトの幅との
比を羽根車の任意の半径において常に一定とした
ことを特徴とする周波数検出装置。 An impeller consisting of a plurality of blades and slits alternately formed in the circumferential direction is attached to a rotating shaft,
In the frequency detection device, a photodetector for detecting the blocking and transmission of light by the blades and slits is provided opposite to the impeller, and the ratio between the width of the blades and the width of the slits in the circumferential direction of the impeller. A frequency detection device characterized in that the frequency is always constant at any radius of the impeller.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10374488U JPH0225867U (en) | 1988-08-05 | 1988-08-05 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10374488U JPH0225867U (en) | 1988-08-05 | 1988-08-05 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0225867U true JPH0225867U (en) | 1990-02-20 |
Family
ID=31334849
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10374488U Pending JPH0225867U (en) | 1988-08-05 | 1988-08-05 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0225867U (en) |
-
1988
- 1988-08-05 JP JP10374488U patent/JPH0225867U/ja active Pending