JPS647404B2 - - Google Patents
Info
- Publication number
- JPS647404B2 JPS647404B2 JP13816685A JP13816685A JPS647404B2 JP S647404 B2 JPS647404 B2 JP S647404B2 JP 13816685 A JP13816685 A JP 13816685A JP 13816685 A JP13816685 A JP 13816685A JP S647404 B2 JPS647404 B2 JP S647404B2
- Authority
- JP
- Japan
- Prior art keywords
- degaussing
- head
- main body
- body case
- circuit
- 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.)
- Expired
Links
- 230000007274 generation of a signal involved in cell-cell signaling Effects 0.000 claims description 5
- 238000003780 insertion Methods 0.000 description 7
- 230000037431 insertion Effects 0.000 description 7
- 239000003990 capacitor Substances 0.000 description 5
- 230000001681 protective effect Effects 0.000 description 5
- 230000005347 demagnetization Effects 0.000 description 3
- 230000010355 oscillation Effects 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 230000002238 attenuated effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 1
- 230000005389 magnetism Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 description 1
- 229910052753 mercury Inorganic materials 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 229920003002 synthetic resin Polymers 0.000 description 1
- 239000000057 synthetic resin Substances 0.000 description 1
- 239000002023 wood Substances 0.000 description 1
- 229910000859 α-Fe Inorganic materials 0.000 description 1
Classifications
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
- G11B5/465—Arrangements for demagnetisation of heads
Landscapes
- Magnetic Heads (AREA)
- Video Image Reproduction Devices For Color Tv Systems (AREA)
Description
【発明の詳細な説明】
本発明は、テープレコーダー内の各部に帯びた
磁気を消磁する消磁器の改良に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in a demagnetizer that demagnetizes magnetism in various parts within a tape recorder.
通常テープレコーダーは、長期に亘り使用し続
けると、その発生する磁界により磁気ヘツド、キ
ヤプスタン等を含む各部が帯磁し、録音再生特性
が劣化する傾向にあるため、一定期間毎に消磁を
行なう必要がある。従来、カセツト式テープレコ
ーダーに於ける磁気ヘツドの消磁を容易にするた
め、第７図に示すように、フイリツプス型のコン
パクトカセツトと同一規格のケース１内に消磁信
号発生回路２を組込み、磁気ヘツド挿入窓３に対
応して消磁ヘツド４を摺動自在に配備すると共
に、消磁ヘツド４の後端に、ヘツド４の移行と連
繋してオンオフ動作するスイツチ５を具えた消磁
器６が提案されている。かかる消磁器６は、通常
のテープ再生操作、即ち、ケース１をテープレコ
ーダー内に適正にセツトした後、再生ボタンを押
すだけで磁気ヘツドにより消磁ヘツド４が押され
て後退し、スイツチ５がオンして消磁回路２が作
動し、自動的に磁気ヘツドが消磁される構成であ
つて、消磁操作に何ら熟練を要することもなく、
磁気ヘツドを確実に消磁することができる。その
反面、かかる型式の消磁器６は汎用性に欠け、コ
ンパクトカセツトを使用する録再装置以外のもの
には使用できず、また磁気ヘツド以外は消磁でき
ないなどの不都合が多い。 Normally, when a tape recorder is used for a long period of time, the magnetic field generated tends to magnetize various parts including the magnetic head, capstan, etc., and the recording and playback characteristics tend to deteriorate. Therefore, it is necessary to demagnetize the tape recorder at regular intervals. be. Conventionally, in order to facilitate the degaussing of the magnetic head in a cassette type tape recorder, a degaussing signal generating circuit 2 was built into a case 1 of the same standard as a Phillips-type compact cassette, as shown in FIG. A demagnetizer 6 has been proposed in which a degaussing head 4 is slidably disposed corresponding to the insertion window 3, and a switch 5 is provided at the rear end of the degaussing head 4 to turn on and off in conjunction with the movement of the head 4. There is. The degaussing device 6 can be used in a normal tape playback operation, that is, by simply pressing the playback button after properly setting the case 1 in the tape recorder, the degaussing head 4 is pushed back by the magnetic head, and the switch 5 is turned on. The degaussing circuit 2 is activated to automatically demagnetize the magnetic head, and the degaussing operation does not require any skill.
The magnetic head can be reliably demagnetized. On the other hand, this type of demagnetizer 6 lacks versatility and has many disadvantages, such as being unable to be used for anything other than a recording/reproducing apparatus using a compact cassette, and being unable to demagnetize anything other than magnetic heads.
本発明は、上記カセツトテープタイプの消磁器
に於いて、消磁ヘツド部分を本体ケースに対し着
脱自在に構成することにより、適用するテープレ
コーダーのタイプが限定されず、又、磁気ヘツド
以外の各部の消磁にも利用できる消磁器を提供す
ることを目的とする。 In the above-mentioned cassette tape type demagnetizer, the demagnetizing head part is configured to be detachable from the main body case, so that the type of tape recorder to which it is applied is not limited, and each part other than the magnetic head can be removed. The purpose is to provide a demagnetizer that can also be used for demagnetization.
以下図面に示す実施例に基づき、本発明を具体
的に説明する。 The present invention will be specifically described below based on embodiments shown in the drawings.
本発明にかかる消磁器７は、第１図および第２
図に示す如く、フイリツプス型のコンパクトカセ
ツトと同一規格の本体ケース８内に、減衰交番電
圧を発生する消磁信号発生回路２と、該回路２に
電力を供給するボタン型水銀電池などの電池９
と、消磁信号発生回路２で発生した電気信号を磁
界に交換する消磁ヘツド部１０を配備して成る。 The demagnetizer 7 according to the present invention is shown in FIGS.
As shown in the figure, a degaussing signal generating circuit 2 that generates an attenuated alternating voltage is housed in a main body case 8 that has the same specifications as a Philips-type compact cassette, and a battery 9 such as a button-type mercury battery that supplies power to the circuit 2.
A degaussing head section 10 is provided for exchanging the electric signal generated by the degaussing signal generating circuit 2 into a magnetic field.
本体ケース８は、合成樹指材で形成した上ケー
ス８ａと下ケース８ｂと蓋合わせ状に構成してな
り、上下ケース８ａ，８ｂを貫通して、テープレ
コーダーの回転軸挿入孔１１，１１を開設すると
共に、下ケース８ｂの電池配設部分に開設した電
池挿入孔１２をスライド式の開閉蓋１３で閉蓋し
ている。 The main body case 8 is constructed of an upper case 8a and a lower case 8b formed of synthetic wood fingers in a mating manner, and the rotation shaft insertion holes 11, 11 of the tape recorder are inserted through the upper and lower cases 8a, 8b. At the same time, the battery insertion hole 12 opened in the battery installation portion of the lower case 8b is closed with a sliding opening/closing lid 13.
消磁信号発生回路２は、第３図のブロツク図で
示す如く、電池９の電圧V1をDC−DCコンバー
ター１４で昇圧した後、この出力電圧V2をスイ
ツチング回路１５に印加する。スイツチング回路
は、入力電圧V2が例えば16V程度の設定電圧V′2
になるとオンするように予め設定したトランジス
タスイツチであつて、該スイツチング回路１５の
出力側に繋いだ大容量のコンデンサ１６に電圧
V′2を転写する。それと同時に、スイツチング回
路１５の入力側から制御回路１７に向けて発光ダ
イオード１８を通じて信号を送ることによりスイ
ツチング回路１５を開いてDC−DCコンバーター
１４とコンデンサ１６を完全に分離すると共に、
DC−DCコンバーター１４の出力電圧V2を、発
光ダイオード１８を発光させて電池９の正常を表
示できるだけの十分低い電圧まで降下させる。コ
ンデンサ１６の両端には、更に無安定マチルバイ
ブレータのごとく、入力電圧値に略比例したピー
ク値をもつ交番電圧を発生する自励発振回路１９
が接続されている。DC−DCコンバーター１４か
らコンデンサ１６へ電圧V′2を転写すると同時に
発振回路１９は発振を開始するが、この瞬間コン
デンサ１６への電流の補充は断たれるので、コン
デンサ１６は放電を続けて端子間電圧を降下し、
従つて、発振回路１９からは、ある一定の時定数
でピーク値が降下する減衰交番電圧V3が得られ
る。かかる電圧V3は、消磁ヘツド部１０の消磁
ヘツド２１に印加され、減衰交番磁界に交換され
る。 As shown in the block diagram of FIG. 3, the degaussing signal generating circuit 2 boosts the voltage V 1 of the battery 9 with the DC-DC converter 14 and then applies this output voltage V 2 to the switching circuit 15. The switching circuit is designed so that the input voltage V 2 is a set voltage V′ 2 of about 16V, for example.
This is a transistor switch that is preset to turn on when the switching circuit 15 turns on.
Transcribe V′ 2 . At the same time, a signal is sent from the input side of the switching circuit 15 to the control circuit 17 through the light emitting diode 18, thereby opening the switching circuit 15 and completely separating the DC-DC converter 14 and the capacitor 16.
The output voltage V 2 of the DC-DC converter 14 is lowered to a voltage sufficiently low to cause the light emitting diode 18 to emit light and indicate that the battery 9 is normal. At both ends of the capacitor 16, there is also a self-excited oscillation circuit 19 that generates an alternating voltage having a peak value approximately proportional to the input voltage value, like an astable multi-vibrator.
is connected. The oscillation circuit 19 starts oscillating at the same time as the voltage V' 2 is transferred from the DC-DC converter 14 to the capacitor 16, but at this moment, the replenishment of current to the capacitor 16 is cut off, so the capacitor 16 continues to discharge and the terminal drop the voltage between
Therefore, from the oscillation circuit 19, a damped alternating voltage V3 whose peak value drops at a certain time constant is obtained. Such voltage V 3 is applied to the demagnetizing head 21 of the demagnetizing head section 10 and is exchanged with a damped alternating magnetic field.
消磁ヘツド部１０は、前面が開放したヘツドケ
ース２２内の最奥部に、押圧片２３を開口２４側
に向けてリミツトスイツチ２５を固定する一方、
開口２４近傍に消磁ヘツド２１を摺動自在に配備
している。消磁ヘツド２１は、略コ字状の焼結フ
エライトコアもしくは積層鉄心２６の脚部２７
に、コイル２８を巻回したコイルボビン２９を嵌
めると共に、先端部を、軟質合成樹脂材などで形
成した保護ピース３０で覆つたものであつて、コ
イルボビン２９の前面をヘツドケース２２の抜け
止め縁３１に当接させて保護ピース３０をヘツド
ケース開口２４から露出すると共に、裏面３２を
リミツトスイツチ２５の押圧片２３に当接配備す
ることにより、通常はリミツトスイツチ２５のバ
ネ圧で消磁ヘツド２１を開口２４側に付勢してお
き、保護ピース３０の押圧と同時に消磁ヘツド２
１はスライドして押圧片２３を押し、リミツトス
イツチ２５の接点３３を閉じる。 The degaussing head section 10 has a limit switch 25 fixed in the innermost part of the head case 22 whose front surface is open, with the pressing piece 23 facing the opening 24 side.
A demagnetizing head 21 is slidably disposed near the opening 24. The degaussing head 21 has a substantially U-shaped sintered ferrite core or a leg portion 27 of a laminated iron core 26.
A coil bobbin 29 on which the coil 28 is wound is fitted into the coil bobbin 29, and the tip thereof is covered with a protective piece 30 made of a soft synthetic resin material. By abutting the protection piece 30 to expose it from the head case opening 24 and placing the back surface 32 in contact with the pressing piece 23 of the limit switch 25, the degaussing head 21 is normally attached to the opening 24 side by the spring pressure of the limit switch 25. the degaussing head 2 at the same time as pressing the protective piece 30.
1 slides to press the pressing piece 23 and close the contact 33 of the limit switch 25.
一方、本体ケース８に於ける、従来の磁気ヘツ
ド挿入窓形成位置に対応して、上記消磁ヘツド部
１０のヘツドケース２２が嵌まるヘツド挿入室３
４を形成することにより、消磁ヘツド部１０これ
全体が本体ケース８に対し抜き差し自在とすると
共に、消磁ヘツド２１およびリミツトスイツチ２
５を十分長い接続線２０で消磁信号発生回路２に
繋いでいる。 On the other hand, a head insertion chamber 3 into which the head case 22 of the degaussing head section 10 is fitted corresponds to the position where the conventional magnetic head insertion window is formed in the main body case 8.
4, the entire degaussing head 10 can be inserted and removed from the main body case 8, and the degaussing head 21 and limit switch 2 can be inserted and removed.
5 is connected to the degaussing signal generation circuit 2 by a sufficiently long connection line 20.
従つて、本発明にかかる消磁器７を用いてテー
プレコーダー各部、例えばキヤプスタン３５の消
磁を行なう場合、本体ケース８から消磁ヘツド部
１０を取り出し、第４図および第５図ａの如く、
キヤプスタン３５に消磁ヘツド２１の先端の保護
ピース３０を押し付けると、第５図ｂの様に消磁
ヘツド２１が後退してリミツトスイツチ２５の押
圧片２３を押し、接点３３を閉じる。すると電池
９が消磁回路２に接続され、消磁回路２から消磁
ヘツド２１に向け交番電圧V3が印加され、かか
る電圧V3は消磁ヘツド２１により消磁に必要な
減衰交番磁界に変換されてキヤプスタン３５に付
与され、消磁が完了するのである。 Therefore, when degaussing various parts of a tape recorder, for example, the capstan 35, using the demagnetizer 7 according to the present invention, the degaussing head 10 is taken out from the main body case 8 and as shown in FIGS. 4 and 5a.
When the protective piece 30 at the tip of the degaussing head 21 is pressed against the capstan 35, the degaussing head 21 retreats as shown in FIG. Then, the battery 9 is connected to the degaussing circuit 2, and an alternating voltage V3 is applied from the degaussing circuit 2 to the degaussing head 21, and this voltage V3 is converted by the degaussing head 21 into an attenuated alternating magnetic field necessary for demagnetizing the capstan 35. demagnetization is completed.
第６図は本発明の他の実施例であつて、本体ケ
ース８の上下ケース８ａ，８ｂを貫通して切り込
み３６を設けると共に、該切り込み３６の対向す
る両内面に案内溝３７，３７をヘツドケース２２
の両外面には案内溝３７，３７に嵌まる案内突条
３８，３８を形成している。本実施例に於いて、
消磁ヘツド部１０の装着および取り外しを行なう
場合、ヘツドケース２２の上下面３９，４０を指
先で挾んで行なえるので消磁ヘツド２１を傷める
ことなく容易かつ確実に消磁操作を完了できる。 FIG. 6 shows another embodiment of the present invention, in which a notch 36 is provided through the upper and lower cases 8a, 8b of the main body case 8, and guide grooves 37, 37 are formed on both opposing inner surfaces of the notch 36. 22
Guide protrusions 38, 38 that fit into guide grooves 37, 37 are formed on both outer surfaces of. In this example,
When mounting and removing the demagnetizing head section 10, the upper and lower surfaces 39, 40 of the head case 22 can be held between the fingertips, so that the demagnetizing operation can be completed easily and reliably without damaging the demagnetizing head 21.
なお消磁ヘツド部１０の構成は上記に限定され
ることはなく、本体ケース８に対し着脱できるも
のであれば適宜変更できることは勿論である。 It should be noted that the configuration of the demagnetizing head section 10 is not limited to the above-mentioned configuration, and can of course be changed as appropriate as long as it can be attached to and detached from the main body case 8.
又、発光ダイオード１８を、本体ケース８側に
代えてヘツドケース２２に取り付けてもよい。 Further, the light emitting diode 18 may be attached to the head case 22 instead of the main body case 8 side.
上記実施例においてはカセツト型本体ケースと
してフイリツプス型コンパクトカセツトを示して
いるが、これ以外にも８トラツク用カートリツジ
タイプやマイクロカセツトタイプのものにも応用
できることは言うまでもない。 In the above embodiment, a Phillips type compact cassette is shown as the cassette type main body case, but it goes without saying that the present invention can also be applied to an 8-track cartridge type or a micro cassette type.
本発明は上記の如くカセツト型の本体ケース８
内に交番電圧を発生する消磁信号発生回路２と、
この信号発生回路２に電力を供給する電源９とを
備えた消磁器において、本体ケース８の磁気ヘツ
ド挿入位置に、前記交番電圧を交番磁界に交換す
る消磁ヘツド部１０を着脱自在に装置し、消磁ヘ
ツド部１０と前記消磁信号発生回路２間を接続線
２０で連繋したので、使用頻度の高いカセツトタ
イプテープデツキの磁気ヘツド消磁には、消磁ヘ
ツド部１０を本体ケース８に装着したまま従来と
同様な再生操作を行ない、オープンタイプのカセ
ツトデツキおよび磁気ヘツド以外の消磁は、消磁
ヘツド部１０を本体ケースから外し、先端の保護
ピース３０を押し付けるだけで消磁が完了し、適
用する機種が何ら限定されることがない利点を有
する。 As described above, the present invention includes a cassette-type main body case 8.
a degaussing signal generation circuit 2 that generates an alternating voltage within;
In a demagnetizer equipped with a power source 9 that supplies power to the signal generating circuit 2, a demagnetizing head section 10 for exchanging the alternating voltage to an alternating magnetic field is detachably installed at the magnetic head insertion position of the main body case 8, Since the degaussing head section 10 and the degaussing signal generating circuit 2 are connected by the connecting wire 20, the magnetic head of a frequently used cassette type tape deck can be demagnetized without leaving the degaussing head section 10 attached to the main body case 8. To demagnetize anything other than an open type cassette deck or magnetic head by performing a similar playback operation, simply remove the degaussing head section 10 from the main body case and press the protective piece 30 at the tip to complete the demagnetization process, and there are no restrictions on the models to which it can be applied. It has the advantage of not being
第１図ないし第５図は本発明にかかる消磁器を
示し、第１図は中央断面図、第２図は消磁ヘツド
部を取り出した状態を示す斜視図、第３図は電気
回路の概略を示すブロツク図、第４図は消磁ヘツ
ド部の使用状態を示す斜視図、第５図ａおよびｂ
は消磁ヘツド部の動作状況を示す断面図である。
第６図は本発明の他の実施例を示す斜視図、第７
図は従来例である。
７……消磁器、８……本体ケース、８ａ……上
ケース、８ｂ……下ケース、９……電源（電池）、
１０……消磁ヘツド部、１８……発光ダイオー
ド、２……消磁信号発生回路、２１……消磁ヘツ
ド、２２……ヘツドケース、２５……リミツトス
イツチ、２８……コイル、３０……保護ピース、
３４……ヘツド挿入室。
1 to 5 show a demagnetizer according to the present invention, FIG. 1 is a central sectional view, FIG. 2 is a perspective view showing the degaussing head taken out, and FIG. 3 is a schematic diagram of the electric circuit. 4 is a perspective view showing the state in which the degaussing head is used, and FIGS. 5 a and b.
FIG. 2 is a sectional view showing the operating state of the degaussing head section.
FIG. 6 is a perspective view showing another embodiment of the present invention;
The figure shows a conventional example. 7...Demagnetizer, 8...Main case, 8a...Upper case, 8b...Lower case, 9...Power source (battery),
DESCRIPTION OF SYMBOLS 10... Demagnetizing head section, 18... Light emitting diode, 2... Demagnetizing signal generation circuit, 21... Demagnetizing head, 22... Head case, 25... Limit switch, 28... Coil, 30... Protective piece,
34...Head insertion room.
Claims (1)
生する消磁信号発生回路２と、この信号発生回路
２に電力を供給する電源９とを備えた消磁器にお
いて、本体ケース８の磁気ヘツド挿入位置に、前
記交番電圧を交番磁界に交換する消磁ヘツド部１
０を着脱自在に装置し、消磁ヘツド部１０と前記
消磁信号発生回路２間を接続線２０で連繋したこ
とを特徴とする消磁器。1 In a demagnetizer equipped with a degaussing signal generation circuit 2 that generates an alternating voltage in a cassette-type main body case 8 and a power supply 9 that supplies power to this signal generation circuit 2, a magnetic head is inserted into the main body case 8 at the position where the magnetic head is inserted. , a degaussing head section 1 for exchanging the alternating voltage with an alternating magnetic field;
1. A degaussing device characterized in that a degaussing head section 10 and the degaussing signal generating circuit 2 are connected by a connecting wire 20.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13816685A JPS6117215A (en) | 1985-06-24 | 1985-06-24 | Degausser |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13816685A JPS6117215A (en) | 1985-06-24 | 1985-06-24 | Degausser |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6117215A JPS6117215A (en) | 1986-01-25 |
| JPS647404B2 true JPS647404B2 (en) | 1989-02-08 |
Family
ID=15215569
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP13816685A Granted JPS6117215A (en) | 1985-06-24 | 1985-06-24 | Degausser |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6117215A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06231436A (en) * | 1993-01-29 | 1994-08-19 | Sofutetsuku Kogyo:Kk | Cassette type device for demagnetizing magnetic head |
-
1985
- 1985-06-24 JP JP13816685A patent/JPS6117215A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6117215A (en) | 1986-01-25 |
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