JPH0510743B2 - - Google Patents
Info
- Publication number
- JPH0510743B2 JPH0510743B2 JP20291884A JP20291884A JPH0510743B2 JP H0510743 B2 JPH0510743 B2 JP H0510743B2 JP 20291884 A JP20291884 A JP 20291884A JP 20291884 A JP20291884 A JP 20291884A JP H0510743 B2 JPH0510743 B2 JP H0510743B2
- Authority
- JP
- Japan
- Prior art keywords
- drum
- chassis
- mounting
- reference surface
- positioning pin
- 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 - Lifetime
Links
- 230000000694 effects Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000009434 installation Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
Landscapes
- Moving Of Heads (AREA)
- Holding Or Fastening Of Disk On Rotational Shaft (AREA)
Description
【発明の詳細な説明】
〔産業上の利用分野〕
この発明は、磁気テープに対して情報を記録し
たり、または読み出す回転磁気ヘツドを備えたド
ラムを、シヤーシの基準面に正確に取り付けるこ
とができる記録再生装置のドラム取付構造に関す
るものである。[Detailed Description of the Invention] [Industrial Application Field] The present invention provides a method for accurately mounting a drum equipped with a rotating magnetic head for recording or reading information on a magnetic tape on a reference surface of a chassis. The present invention relates to a drum mounting structure for a recording/reproducing device.
記録再生装置（ビデオテープレコーダ）のドラ
ムをシヤーシの基準面に取り付ける方法として、
第５図のようにシヤーシ１の基準面１Ａにドラム
２を取付ねじ３で直接取り付ける方法と、第６図
のようにシヤーシ１の基準面１Ａにドラム２をコ
イル状のばね４の付勢力を介して穴１Ｂに挿入し
た取付ねじ３で取り付ける方法がある。
As a method of attaching the drum of a recording/playback device (video tape recorder) to the reference surface of the chassis,
As shown in FIG. 5, the drum 2 is directly attached to the reference surface 1A of the chassis 1 with the mounting screw 3, and as shown in FIG. There is a method of attaching with the mounting screw 3 inserted into the hole 1B through the hole 1B.
第５図のようにシヤーシ１にドラム２を直接固
定する場合は、取付ねじ３の締め具合によつては
ドラム２の外周に設けた磁気テープを案内するリ
ード面が変形したり、基準面１Ａに対してドラム
２が傾いて取り付けられる等の問題がある。
When the drum 2 is directly fixed to the chassis 1 as shown in FIG. There are problems such as the drum 2 being attached at an angle with respect to the drum 2.
そこで、第６図のようにばね４を介してドラム
２を固定すると、取付ねじ３の締め具合に依存す
るドラムの位置誤差の変動が少なくなるが、衝撃
等によつてドラム２が基準面１Ａから浮く移動量
が大きくなるため、ドラム２の上側に他の部品を
配置するときは適当な空間を確保して部品を配置
するか、ドラム２の移動量を規制する手段を別途
に設ける必要がある。また、ドラム２が衝撃等の
よつて移動した後、もとの位置に戻る場合の位置
精度は取付ねじ３が挿入されている穴１Ｂの精度
で決まるため、ドラム２の位置が衝撃等で変化し
た後に問題が生じることになる。 Therefore, if the drum 2 is fixed via a spring 4 as shown in FIG. 6, the fluctuation in the position error of the drum depending on the tightening condition of the mounting screw 3 will be reduced. Since the amount of movement of the drum 2 increases, when placing other parts on the upper side of the drum 2, it is necessary to secure an appropriate space for the parts or provide a separate means for regulating the amount of movement of the drum 2. be. In addition, the positional accuracy when the drum 2 returns to its original position after being moved due to an impact etc. is determined by the accuracy of the hole 1B into which the mounting screw 3 is inserted, so the position of the drum 2 may change due to an impact etc. Problems will arise after that.
この発明は、上記した問題点を解決するために
なされたもので、テープに対するドラムのリード
面を変位させることなく基準面に位置精度よく、
かつ、衝撃等による移動量を所定範囲としてシヤ
ーシにドラムを取り付けることができるようにし
た記録再生装置のドラム取付構造を提供するもの
である。 This invention was made to solve the above-mentioned problems, and it is possible to accurately position the lead surface of the drum relative to the tape on the reference surface without displacing it.
Further, the present invention provides a drum mounting structure for a recording/reproducing device in which the drum can be mounted on the chassis with the amount of movement caused by impact or the like within a predetermined range.
第１図はこの発明に従う実施例を示す側面図、
第２図ａ，ｂはドラムの底面図と取付ねじの拡大
図である。
FIG. 1 is a side view showing an embodiment according to the present invention;
Figures 2a and 2b are a bottom view of the drum and an enlarged view of the mounting screws.
これらの図において、１１はシヤーシ、１１Ａ
は前記シヤーシ１１に設けたねじ孔、１２，１３
はそれぞれ前記シヤーシ１１に設けた複数個のボ
スで、この実施例では３個のボス１２の上面は基
準面１２Ａを構成している。また、同様に３個の
ボス１３には位置決めピン１３Ａが設けられてい
る。 In these figures, 11 is a chassis, 11A
are screw holes provided in the chassis 11, 12, 13;
are a plurality of bosses provided on the chassis 11, and in this embodiment, the upper surfaces of the three bosses 12 constitute a reference surface 12A. Similarly, the three bosses 13 are provided with positioning pins 13A.
１４はドラムで、上ドラム１５と、モータを内
蔵した下ドラム１６と、下ドラム１６にねじ１８
で取り付けたプラスチツク製の取付部１７で構成
されている。そして、第２図ａに示すように下ド
ラム１６には前記位置決めピン１３Ａが入る凹部
１６Ａが設けられて、取付部１７には取付孔１７
Ａが設けられている。 14 is a drum, an upper drum 15, a lower drum 16 with a built-in motor, and a screw 18 on the lower drum 16.
It consists of a plastic mounting part 17 attached with. As shown in FIG. 2a, the lower drum 16 is provided with a recess 16A into which the positioning pin 13A is inserted, and the mounting portion 17 is provided with a mounting hole 17.
A is provided.
第２図ｂに拡大図で示されている１９は前記取
付孔１７Ａに挿入する取付ねじで、シヤーシ１１
のねじ孔１１Ａに螺合するねじ部１９Ａと、シヤ
ーシ１１に当接するねじ部１９Ａよりも太径の第
１の段部１９Ｂと、第１の段部１９Ｂより太径の
第２の段部１９Ｃと、頭部１９Ｄで構成されてい
る。 Reference numeral 19 shown in an enlarged view in FIG. 2b is a mounting screw inserted into the mounting hole 17A.
A threaded portion 19A that is screwed into the screw hole 11A of and a head 19D.
２０は前記取付ねじ１９が挿入されているコイ
ル状のばね、２１は前記第２の段部１９Ｃに対抗
して挿入されるワツシヤ、２２はプラスチツク製
のワツシヤで、取付ねじ１９の径方向の収縮力に
よつて取付ねじ１９に嵌合されているばね２０
と、ワツシヤ２１が抜け出ないように係止させる
ものである。なお、下ドラム１６に形成されてい
る凹部１６Ａに入る位置決めピン１３Ａの長さ
は、取付ねじ１９に嵌合されているばね２０が縮
小してワツシヤ２１が第２の段部１９Ｃに当接す
る移動ストロークよりも深くなるようにしてあ
る。 20 is a coiled spring into which the mounting screw 19 is inserted; 21 is a washer inserted against the second step portion 19C; 22 is a plastic washer which is used to prevent the mounting screw 19 from contracting in the radial direction; Spring 20 fitted into mounting screw 19 by force
This locks the washer 21 so that it does not slip out. The length of the positioning pin 13A that enters the recess 16A formed in the lower drum 16 is determined by the length of the positioning pin 13A when the spring 20 fitted to the mounting screw 19 contracts and the washer 21 moves to abut against the second step 19C. It is designed to be deeper than the stroke.
次に、ドラム１４の取り付け等について説明す
る。 Next, the installation of the drum 14 and the like will be explained.
まず、下ドラム１６に取付部１７をねじ１８で
取り付け、上ドラム１５を組み込んでドラム１４
を組み立てる。取付部１７はプラスチツクで構成
しているので、ねじ１８の締め付け具合によつて
下ドラム１６の外周に設けたリード面が変形する
ようなストレスを与えるようなことはない。 First, attach the mounting part 17 to the lower drum 16 with the screws 18, and install the upper drum 15 to the drum 14.
Assemble. Since the mounting portion 17 is made of plastic, stress that would deform the lead surface provided on the outer periphery of the lower drum 16 due to the tightness of the screw 18 will not be applied.
そして、下ドラム１６の凹部１６Ａ内に位置決
めピン１３Ａをそれぞれ挿入して基準面１２Ａに
ドラム１４を乗せると、第２図ａに示すように下
ドラム１６の位置P1〜P3にボス１２の基準面１
２Ａが当接する。この状態でばね２０、およびワ
ツシヤ２１，２２を組み込んだ第２図ｂの取付ね
じ１９でシヤーシ取付部１７をシヤーシ１１に取
り付ける。すると、ねじ部１９Ａはねじ孔１１Ａ
に螺合して第１の段部１９Ｂがシヤーシ１１に当
接する。 Then, when the positioning pins 13A are inserted into the recesses 16A of the lower drum 16 and the drum 14 is placed on the reference surface 12A, the bosses 12 are positioned at positions P 1 to P 3 of the lower drum 16 as shown in FIG. 2a. Reference plane 1
2A makes contact. In this state, the chassis mounting portion 17 is attached to the chassis 11 using the mounting screw 19 shown in FIG. 2b incorporating the spring 20 and washers 21 and 22. Then, the threaded portion 19A is inserted into the threaded hole 11A.
The first stepped portion 19B is screwed into contact with the chassis 11.
取付部１７はばね２０によつて押圧され、この
取付部１７にねじ１８によつて固定されている下
ドラム１６の底面の基準面がボス１２の基準面に
衝合する。 The mounting portion 17 is pressed by a spring 20, and the reference surface of the bottom of the lower drum 16, which is fixed to the mounting portion 17 by a screw 18, abuts against the reference surface of the boss 12.
したがつて、ばね２０の付勢力でドラム１４を
基準面１２Ａに押圧した状態で固定できる。 Therefore, the drum 14 can be fixed in a pressed state against the reference surface 12A by the biasing force of the spring 20.
なお、この状態ではバネ２０が圧縮された状態
になるが、第２の段部１９Ｃとワツシヤ２１の間
に間隔が残つている。 In this state, the spring 20 is in a compressed state, but a gap remains between the second step portion 19C and the washer 21.
上記のようにドラム１４をシヤーシ１１に取り
付けると、ばね２０の伸長力でドラム１４を基準
面１２Ａに押圧するため、ドラム１４が傾くこと
なく取り付けることができる。 When the drum 14 is attached to the chassis 11 as described above, the extension force of the spring 20 presses the drum 14 against the reference surface 12A, so that the drum 14 can be attached without tilting.
また、ドラム１４がばね２０を縮小させて移動
するような衝撃があつても、取付部１７はワツシ
ヤ２１，２２を介して第２の段部１９Ｃに当接し
ているばね２０により移動を規制され、ドラム１
４の上方が有効に利用できる。 Furthermore, even if there is an impact that causes the drum 14 to contract and move the spring 20, the movement of the mounting portion 17 is restricted by the spring 20 that is in contact with the second stepped portion 19C via the washers 21 and 22. , drum 1
The upper part of 4 can be used effectively.
さらに、ドラム１４に水平方向の衝撃が印加さ
れたときでも位置決めピン１３Ａで下ドラム１６
の移動が禁止されているため、テープパスが狂う
ことがない。 Furthermore, even when a horizontal impact is applied to the drum 14, the positioning pin 13A allows the lower drum 16
movement is prohibited, so the tape path will not go awry.
なお、取付ねじ１９の第１の段部１９Ｂと第２
の段部１９Ｃの直径の差を0.5〜１mm位として頭
部１９Ｄの小さいものを用いると、ドラム１４の
取付空間は内蔵したモータに比較して小さくする
ことができる。 Note that the first step 19B and the second step of the mounting screw 19
If the difference in diameter of the stepped portion 19C is set to about 0.5 to 1 mm and a smaller head 19D is used, the mounting space for the drum 14 can be made smaller compared to a built-in motor.
第３図はこの発明の他の実施例を示す取付ねじ
の部分を示す拡大図で、第１図と同一符号は同一
部分を示す。 FIG. 3 is an enlarged view showing a mounting screw portion showing another embodiment of the present invention, and the same reference numerals as in FIG. 1 indicate the same parts.
この図において、２３は前記取付孔１７Ａに挿
入する取付ねじで、シヤーシ１１のねじ孔１１Ａ
に螺合するねじ部２３Ａと、シヤーシ１１に当接
するねじ部２３Ａよりも太径の第１の段部２３Ｂ
と、取付部１７の取付穴１７よりも太径の第２の
段部２３Ｃと、頭部２３Ｄで構成されている。 In this figure, reference numeral 23 denotes a mounting screw inserted into the mounting hole 17A, and is a mounting screw 23 inserted into the mounting hole 11A of the chassis 11.
a first stepped portion 23B having a larger diameter than the threaded portion 23A that comes into contact with the chassis 11;
, a second stepped portion 23C having a diameter larger than that of the mounting hole 17 of the mounting portion 17, and a head portion 23D.
このような取付ねじ２３を使用してドラム１４
を前述したようにシヤーシ１１の基準面１２Ａに
ばね２０の付勢力で押圧、固定すると、衝撃等に
よつてドラム１４が移動しても第２の段部２３Ｃ
で十分に取付部１７の移動を規制できるため、第
１図の実施例のようなワツシヤ２１，２２を省略
することができ、同等の効果が得られる。 Using such a mounting screw 23, the drum 14
As described above, when pressed and fixed to the reference surface 12A of the chassis 11 by the biasing force of the spring 20, even if the drum 14 moves due to an impact or the like, the second stepped portion 23C
Since the movement of the mounting portion 17 can be sufficiently restricted by the above, the washers 21 and 22 as in the embodiment shown in FIG. 1 can be omitted, and the same effect can be obtained.
第４図はこの発明のさらに他の実施例を示す一
部を破断した側面図で、第１図と同一符号は同一
部分を示す。 FIG. 4 is a partially cutaway side view showing still another embodiment of the invention, in which the same reference numerals as in FIG. 1 indicate the same parts.
この図において、２４はシヤーシ、２４Ａは前
記シヤーシ２４の基準面で、この基準面２４には
位置決めピン２４Ｂが複数本設けられている。な
お、この実施例のドラム１４は、上、下ドラム１
５，１６のみで構成され、モータによる駆動部は
シヤーシ２４の下面に突出している。 In this figure, 24 is a chassis, 24A is a reference surface of the chassis 24, and this reference surface 24 is provided with a plurality of positioning pins 24B. Note that the drum 14 of this embodiment has an upper drum 1 and a lower drum 1
It is composed of only 5 and 16, and a driving part by a motor protrudes from the lower surface of the chassis 24.
第４図の実施例は、第１図、第３図の実施例に
おける取付部１７を省略してドラム１４を直接シ
ヤーシ２４に前述した第２図ｂの取付ねじ１９等
で取り付ける場合を示している。この場合も第１
図の実施例とほぼ同等の効果が得られる。 The embodiment shown in FIG. 4 shows a case in which the mounting portion 17 in the embodiments shown in FIGS. 1 and 3 is omitted, and the drum 14 is directly attached to the chassis 24 using the mounting screws 19 shown in FIG. 2b described above. There is. In this case as well, the first
Almost the same effect as the embodiment shown in the figure can be obtained.
以上説明したように、この発明の記録再生装置
のドラム取付構造は、シヤーシの基準面にドラム
をコイルバネ等からなる付勢手段で押圧して取り
付け、衝撃等によるドラムの移動ストロークを取
付ねじの第２の段部で規制するとともに、位置決
めピンでドラムの上下方向の移動を案内すると共
に水平方向の移動を禁止する構成としたので、ド
ラムのリード面を変偏させることなく、位置精度
よく基準面に取り付けることができる。また、取
付ねじの第２の段部でドラムの上下方向の移動ス
トロークを制限しているので、ドラムの上方の空
間を有効に利用でき、小型化をはかることができ
る等の利点がある。
As explained above, the drum mounting structure of the recording/reproducing device of the present invention is such that the drum is mounted on the reference surface of the chassis by pressing it with a biasing means such as a coil spring, and the movement stroke of the drum due to impact etc. is controlled by the mounting screw. The structure is such that the vertical movement of the drum is guided by the positioning pin and the horizontal movement is prohibited, so that the drum lead surface is not biased and can be positioned accurately on the reference surface. It can be attached to. Further, since the vertical movement stroke of the drum is limited by the second stepped portion of the mounting screw, the space above the drum can be used effectively, and there are advantages such as being able to reduce the size of the drum.
第１図はこの発明の一実施例を示す側面図、第
２図ａ，ｂはドラムの底面図と取付ねじの拡大
図、第３図はこの発明の他の実施例の取付ねじの
部分を示す拡大図、第４図はこの発明のさらに他
の実施例を示す一部を破断した側面図、第５図、
第６図は従来例を示す一部を破断した側面図であ
る。
図中、１１はシヤーシ、１１Ａはねじ孔、１
２，１３はボス、１２Ａは基準面、１３Ａは位置
決めピン、１４はドラム、１６Ａは凹部、１９は
取付ねじ、１９Ｂは第１の段部、１９Ｃは第２の
段部、２０はばねである。
Fig. 1 is a side view showing one embodiment of the present invention, Fig. 2 a and b are a bottom view of the drum and an enlarged view of the mounting screw, and Fig. 3 shows the mounting screw portion of another embodiment of the invention. FIG. 4 is a partially cutaway side view showing still another embodiment of the present invention, FIG.
FIG. 6 is a partially cutaway side view showing a conventional example. In the figure, 11 is a chassis, 11A is a screw hole, 1
2 and 13 are bosses, 12A is a reference surface, 13A is a positioning pin, 14 is a drum, 16A is a recess, 19 is a mounting screw, 19B is a first step, 19C is a second step, and 20 is a spring. .
Claims (1)
記位置決めピンが入る凹部を設けたドラムの基準
面を、先端側の第１の段部と該第１の段部の大径
部からさらに太径となる頭部側の第２の段部を設
けた取付ねじで付勢手段を介して前記第１の段部
を前記シヤーシまたは前記ドラムの取付部に当接
させてねじ込むことによつて前記シヤーシの基準
面に押圧して取り付け、前記ドラムの基準面が前
記シヤーシの基準面から離れて前記取付ねじの第
２の段部に前記シヤーシまたは前記ドラムの取付
部が当接する移動ストローク内では前記位置決め
ピンが前記凹部から抜けないように構成したこと
を特徴とする記録再生装置のドラム取付構造。1. A reference surface and a positioning pin are provided on the chassis, and the reference surface of the drum, which is provided with a recess into which the positioning pin is inserted, is made to have a larger diameter from the first step on the tip side and the large diameter portion of the first step. By screwing the first step into contact with the mounting portion of the chassis or the drum through a biasing means using a mounting screw provided with a second step on the head side, the chassis is mounted. The positioning pin is attached by pressing against a reference surface, and the positioning pin is attached during a movement stroke in which the reference surface of the drum is separated from the reference surface of the chassis and the mounting portion of the chassis or the drum comes into contact with the second step of the mounting screw. A drum mounting structure for a recording/reproducing device, characterized in that the drum mounting structure is configured such that the drum does not come out of the recess.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20291884A JPS6182359A (en) | 1984-09-29 | 1984-09-29 | Drum fitting structure of recording and reproducing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20291884A JPS6182359A (en) | 1984-09-29 | 1984-09-29 | Drum fitting structure of recording and reproducing device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6182359A JPS6182359A (en) | 1986-04-25 |
| JPH0510743B2 true JPH0510743B2 (en) | 1993-02-10 |
Family
ID=16465318
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP20291884A Granted JPS6182359A (en) | 1984-09-29 | 1984-09-29 | Drum fitting structure of recording and reproducing device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6182359A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0212748U (en) * | 1988-07-11 | 1990-01-26 |
-
1984
- 1984-09-29 JP JP20291884A patent/JPS6182359A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6182359A (en) | 1986-04-25 |
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| EXPY | Cancellation because of completion of term |