JPS6040962A - rotation detection device - Google Patents
rotation detection deviceInfo
- Publication number
- JPS6040962A JPS6040962A JP59142779A JP14277984A JPS6040962A JP S6040962 A JPS6040962 A JP S6040962A JP 59142779 A JP59142779 A JP 59142779A JP 14277984 A JP14277984 A JP 14277984A JP S6040962 A JPS6040962 A JP S6040962A
- Authority
- JP
- Japan
- Prior art keywords
- magnet
- fixed
- base plate
- rotating shaft
- detection device
- 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
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
- G01P3/00—Measuring linear or angular speed; Measuring differences of linear or angular speeds
- G01P3/42—Devices characterised by the use of electric or magnetic means
- G01P3/44—Devices characterised by the use of electric or magnetic means for measuring angular speed
- G01P3/48—Devices characterised by the use of electric or magnetic means for measuring angular speed by measuring frequency of generated current or voltage
- G01P3/481—Devices characterised by the use of electric or magnetic means for measuring angular speed by measuring frequency of generated current or voltage of pulse signals
- G01P3/487—Devices characterised by the use of electric or magnetic means for measuring angular speed by measuring frequency of generated current or voltage of pulse signals delivered by rotating magnets
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Transmission And Conversion Of Sensor Element Output (AREA)
Abstract
Description
【発明の詳細な説明】
本発明はたとえばテープレコーダのテープ終端部の検出
のために用いられる回転検出装置に関するものであシ、
簡単な構成で確実な検出動作を行なわせることのできる
浸れた回転検出装置を提供することを目的とするもので
ある。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a rotation detection device used for detecting the end of a tape in a tape recorder, for example.
It is an object of the present invention to provide a submerged rotation detection device that can perform a reliable detection operation with a simple configuration.
最近、テープレコーダにおいては自動停止、自動演奏、
電子カウント等の機能の高度化が著しく、これに伴いテ
ープ駆動メカニズムの回転を電子的に検出することが不
可欠となりつつある。Recently, in tape recorders, automatic stop, automatic play,
As functions such as electronic counting have become significantly more sophisticated, it has become essential to electronically detect the rotation of the tape drive mechanism.
この目的のために各種の検出装置が用いられているが、
従来この種の装置として最も構成が羊純でデメリットが
少ないものとして電磁変換素子（以下ホール素子という
）を用いた回転検出装置が知られている。第１図に従来
の回転検出装置ｔｌｒ示している。第１図において、１
はテープカウンタ、２はテープ駆動メカニズムの回転軸
よりベルト３を介して駆動されるプーリ、４はグーリ軸
に取付けられた円筒形の磁石、５ｉｌ″ｊ：磁石４に対
向して取付けられたホール素子、６はホール素子６を取
付けた印刷配線基板である。この種の回転検出装置では
磁石４とホール素子５の間隔全適当に選ぶことにより、
ホール素子５の位置で回転する磁石４の磁束密度変化を
検出して回路動作に必要なパルスを得られる訳であるが
、実際にｉｄ磁石４とホール素子５０間隔は各部品の取
付公差、磁石４の外周ふれ、及びホール素子５の組立作
業中の接触又は機器使用中の振動による傾き等の理由に
より、一定値を確保することが極めてむずかしく、ホー
ル素子５自体の感度ばらつきが非常に大きいこととも相
まってホール素子６の動作上必要とされる磁束密度変化
を確保することは困難なものであった。捷た、この問題
を解消するためにホール素子５の背面に透磁体のバック
ヨークもしくは磁石の小片を貼付けた構造のものも見ら
れるが、このようにした場合には、磁石４の回転がこれ
ら磁性片に影曽され、結果的にベルト３を介してテープ
駆動メカニズムの回転にも悪影舎ヲ及ぼす等の欠点があ
り、好ましいものではなかった。Various detection devices are used for this purpose, but
Conventionally, a rotation detection device using an electromagnetic conversion element (hereinafter referred to as a Hall element) is known as a device of this type that has the simplest structure and few disadvantages. FIG. 1 shows a conventional rotation detection device tlr. In Figure 1, 1
is a tape counter, 2 is a pulley driven by the rotating shaft of the tape drive mechanism via a belt 3, 4 is a cylindrical magnet attached to the Gooley shaft, 5il''j is a hole attached opposite to the magnet 4. The element 6 is a printed wiring board on which the Hall element 6 is attached.In this type of rotation detection device, by appropriately selecting the distance between the magnet 4 and the Hall element 5,
The change in magnetic flux density of the magnet 4 rotating at the position of the Hall element 5 is detected to obtain the pulses necessary for circuit operation, but in reality the distance between the ID magnet 4 and the Hall element 50 is determined by the mounting tolerance of each component, the magnet It is extremely difficult to maintain a constant value due to the outer periphery of the sensor 4 and the inclination due to contact during assembly of the Hall element 5 or vibration during use of the device, and the sensitivity variation of the Hall element 5 itself is extremely large. Coupled with this, it has been difficult to ensure the change in magnetic flux density required for the operation of the Hall element 6. In order to solve this problem, there are structures in which a magnetically permeable back yoke or a small piece of magnet is attached to the back of the Hall element 5, but in this case, the rotation of the magnet 4 is This is not desirable because it is affected by the magnetic piece, and as a result, the rotation of the tape drive mechanism is affected by the belt 3.
本発明はこのような従来の欠点を解消するものであり、
以下、本発明について実殉例の図面と共に説明する。第
２図、第３図は本発明の一実栴例を示しており、第２図
及び第３図において、テープカウンタ１は基台９を介し
てテープ駆動メカニズム本体８に固定さｎている。また
円筒形の磁石４はテープカウンタ１の駆動プーリ２とｌ
ｃ１軸に固定され、ベルト３を介しテープ駆動メカニズ
ム本体８の回転軸より駆動される。一方、基台９には印
刷配線基板６がビス１１にて固定され、この印刷配線基
板６に取付けたホール素子５が磁石４の外周面に対向し
て配置されている。上記基台９には鉄板を円筒形状に成
形したバックヨーク７が磁石４及びホール素子５を囲む
位置に配置され、その取付片７ａがビス１２で固定され
ている。印刷配線基板６及びバックヨーク７の基台９に
対する成句けはその取付孔を長円形にすることにＪニリ
、磁石の外周面に対する間隔を調整することが可能であ
る。The present invention solves these conventional drawbacks,
Hereinafter, the present invention will be explained with reference to drawings of actual examples. 2 and 3 show a practical example of the present invention. In FIGS. 2 and 3, the tape counter 1 is fixed to the tape drive mechanism main body 8 via the base 9. . Further, the cylindrical magnet 4 is connected to the driving pulley 2 of the tape counter 1.
It is fixed to the c1 axis and driven by the rotating shaft of the tape drive mechanism main body 8 via the belt 3. On the other hand, a printed wiring board 6 is fixed to the base 9 with screws 11, and a Hall element 5 attached to the printed wiring board 6 is arranged facing the outer peripheral surface of the magnet 4. A back yoke 7 made of an iron plate formed into a cylindrical shape is arranged on the base 9 at a position surrounding the magnet 4 and the Hall element 5, and its mounting piece 7a is fixed with screws 12. The reason why the printed wiring board 6 and the back yoke 7 are attached to the base 9 is that the mounting holes are oval, so that the distance between the magnet and the outer peripheral surface can be adjusted.
このような構成の可法検出装置において、いま磁石４と
ホール素子５の間に回転時のこすれを生ぜしめないため
には、それに相当する最小限の板厚をもったスペーサを
印刷配線基板６に設けた透孔１ｏ、１：り挿入し、その
スペーサを磁石４の外周面に当てた状、帳で印刷配線基
板６及びバックヨーク７を磁石の中心方向に移動して」
＝記スペーサを上記ホール素子６と磁石４間に挾持した
後に−ビス１’ １ 、１２により締付は固定を行ない
、スペーサを抜取ることにより、各部品の取付公差に関
係なく常に最小間隔をもって取付けが行なえ、必要磁束
密度を確保することができる。また、ポール素子５をバ
ックヨーク７の内面に接着す扛ば、ホール素子の振動、
接触によるたおｆＬｆ防止することができる。さらにバ
ックヨーク７は磁石４の全周をおおっているため、部分
的に鉄片を近接させた場合等と異なり、磁石４の吸引作
用に、ｒ、９回転に影響を及ぼすことはない。In the legal detection device having such a configuration, in order to prevent friction between the magnet 4 and the Hall element 5 during rotation, a spacer with a corresponding minimum thickness must be installed on the printed wiring board 6. Insert the spacer into the through holes 1o and 1 provided in the magnet 4, and move the printed wiring board 6 and back yoke 7 toward the center of the magnet using a pad, with the spacer in contact with the outer peripheral surface of the magnet 4.
= After the spacer is sandwiched between the Hall element 6 and the magnet 4, it is fixed by tightening with the screws 1' 1 and 12, and by removing the spacer, it is possible to always maintain the minimum spacing regardless of the installation tolerance of each component. Easy to install and ensure the required magnetic flux density. Moreover, if the pole element 5 is glued to the inner surface of the back yoke 7, the vibration of the Hall element,
It is possible to prevent calluses due to contact. Further, since the back yoke 7 covers the entire circumference of the magnet 4, it does not affect the attraction action of the magnet 4 during r and 9 rotations, unlike when a piece of iron is partially brought close to the magnet.
以上のように本発明によれば、ホール素子の動作に必要
な磁束密度の確保が簡単に行なえるために回転検出動作
が確実なものとなり、回転部に悪影響を及ぼすことも少
なくなるなど、その実用−に憂れた効果が得られるもの
である。As described above, according to the present invention, since the magnetic flux density necessary for the operation of the Hall element can be easily secured, the rotation detection operation becomes reliable, and there are fewer negative effects on the rotating part. In practical use, it is possible to obtain an effect that is of concern.
第１図は従来の回転検出装置の正面図、第２図は本発明
の回転検出装置の一実殉例を示す余１祝図、第３図はそ
の正面図である。
１ ・・・・テープカウンタ、２・・・・・・プーリ、
３・・・・・・ベルト、４・・・・磁石、５・・・ ホ
ール素子、６・・・・・・印刷配線基板、７・ バック
ヨーク、８・・・・・テープ駆動メカニズム本体、９
・基台、１１，１２・・・・・・ビス。
代理人の氏名 弁理士 中 尾 敏 男 ほか１名第１
図
第２図
第３図
３８１−FIG. 1 is a front view of a conventional rotation detection device, FIG. 2 is a diagram showing an example of the rotation detection device of the present invention, and FIG. 3 is a front view thereof. 1...Tape counter, 2...Pulley,
3... Belt, 4... Magnet, 5... Hall element, 6... Printed wiring board, 7. Back yoke, 8... Tape drive mechanism body, 9
・Base, 11, 12... screws. Name of agent: Patent attorney Toshio Nakao and 1 other person No. 1
Figure 2 Figure 3 381-
Claims (2)
の外周面に対向して取付けられた電磁変換素子と、上記
磁石及び電磁変換素子の外周を／Ｉｔ！全周にわたフカ
バーする磁性材よジなるリング状のバックヨークを備え
たことを特徴とする回転検出装置。(1) A rotatable magnet attached to a rotating shaft, an electromagnetic transducer mounted opposite to the outer peripheral surface of the magnet, and an outer circumference of the magnet and electromagnetic transducer /It! A rotation detection device characterized by having a ring-shaped back yoke made of magnetic material that covers the entire circumference.
を磁石の外周面に対して可変しうるように１＋１４成し
たこと全特徴とする特許請求の範囲第１項記載の回転検
出装置。(2) Installation position of back yoke and electromagnetic conversion element 11"t
2. The rotation detecting device according to claim 1, wherein the rotation detecting device has a 1+14 structure so as to be variable with respect to the outer circumferential surface of the magnet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59142779A JPS6040962A (en) | 1984-07-10 | 1984-07-10 | rotation detection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59142779A JPS6040962A (en) | 1984-07-10 | 1984-07-10 | rotation detection device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6040962A true JPS6040962A (en) | 1985-03-04 |
| JPS6134099B2 JPS6134099B2 (en) | 1986-08-06 |
Family
ID=15323394
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP59142779A Granted JPS6040962A (en) | 1984-07-10 | 1984-07-10 | rotation detection device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6040962A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62176814A (en) * | 1986-01-31 | 1987-08-03 | Mazda Motor Corp | Manufacture of colored resin molded form |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6340797U (en) * | 1986-08-29 | 1988-03-16 |
-
1984
- 1984-07-10 JP JP59142779A patent/JPS6040962A/en active Granted
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62176814A (en) * | 1986-01-31 | 1987-08-03 | Mazda Motor Corp | Manufacture of colored resin molded form |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6134099B2 (en) | 1986-08-06 |
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