JPH0210631Y2 - - Google Patents
Info
- Publication number
- JPH0210631Y2 JPH0210631Y2 JP1986160740U JP16074086U JPH0210631Y2 JP H0210631 Y2 JPH0210631 Y2 JP H0210631Y2 JP 1986160740 U JP1986160740 U JP 1986160740U JP 16074086 U JP16074086 U JP 16074086U JP H0210631 Y2 JPH0210631 Y2 JP H0210631Y2
- Authority
- JP
- Japan
- Prior art keywords
- front lid
- spring
- lower half
- front cover
- locking member
- 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
- 238000004804 winding Methods 0.000 claims description 5
- 229910000831 Steel Inorganic materials 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 229910001220 stainless steel Inorganic materials 0.000 description 3
- 239000010935 stainless steel Substances 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- 229910000639 Spring steel Inorganic materials 0.000 description 2
- 238000005452 bending Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 210000000078 claw Anatomy 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
Description
【考案の詳細な説明】
〔産業上の利用分野〕
本考案は、VTR（ビデオテープレコーダ）等に
使用される磁気テープカセツトに関する。[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a magnetic tape cassette used in VTRs (video tape recorders) and the like.
第４図乃至第６図は、家庭用のVTRに使用さ
れる従来の磁気テープカセツトで、第４図は磁気
テープカセツトを下ハーフ側から見た一部切欠き
背面図、第５図は第４図の−断面図、第６図
は第４図の切欠き部に対応する下ハーフ隅部の部
分図を示し、磁気テープカセツト１は、上ハーフ
２と下ハーフ３とでカセツト本体４が形成され、
該カセツト本体４内に磁気テープ５を巻装する供
給リール６ａと巻取りリール６ｂとの一対の巻回
リール６が収納されている。そして、VTR挿入
側となるカセツト本体４の前部には、両リール６
ａ，６ｂから繰り出されて、カセツト本体４のテ
ープガイド部４ａ，４ｂの前面を走行する磁気テ
ープ５を開閉可能に覆う前蓋７が被着されてい
る。
Figures 4 to 6 show conventional magnetic tape cassettes used in household VCRs, with Figure 4 being a partially cutaway rear view of the magnetic tape cassette seen from the lower half side, and Figure 5 being a rear view of the magnetic tape cassette seen from the lower half side. 4 is a cross-sectional view of FIG. 4, and FIG. 6 is a partial view of the corner of the lower half corresponding to the notch in FIG. 4. formed,
A pair of winding reels 6, a supply reel 6a and a take-up reel 6b, for winding the magnetic tape 5 are housed within the cassette body 4. Both reels 6 are located at the front of the cassette main body 4, which is the VTR insertion side.
A front cover 7 is attached so as to be able to open and close the magnetic tape 5 that is fed out from the magnetic tape 5a and 6b and runs on the front surface of the tape guide portions 4a and 4b of the cassette main body 4.
この前蓋７は、前板７ａと天板７ｂの両側に側
板７ｃ，７ｄを延設した平面コ字形に形成されて
いる。側板７ｃの内側には、長軸状の回動支軸８
が、また側板７ｄの内側には短軸状の回動支軸９
がそれぞれ設けられ、該回動支軸８，９を上ハー
フ２の側壁２ａ，２ｂの前部側に穿設した軸孔に
それぞれ軸支して、前蓋７がカセツト本体４に取
付けられる。回動支軸８には、前蓋スプリング１
０としてつる巻きばねが係止されている。 The front lid 7 is formed into a U-shape in plan with side plates 7c and 7d extending on both sides of a front plate 7a and a top plate 7b. Inside the side plate 7c, there is a long axis-shaped rotation support shaft 8.
However, on the inside of the side plate 7d, there is a short shaft-like rotation support shaft 9.
The front cover 7 is attached to the cassette body 4 by supporting the pivot shafts 8 and 9 in shaft holes bored in the front side of the side walls 2a and 2b of the upper half 2, respectively. The front cover spring 1 is attached to the rotation support shaft 8.
0, the helical spring is locked.
前記つる巻きばねからなる前蓋スプリング１０
に対応する下ハーフ３の隅部には、前蓋７をカセ
ツト本体４に閉状態に係止する前蓋係止部材１１
が、その上部両側の支軸１１ａ，１１ｂを下ハー
フ３のリブ３ｂ，３ｃに懸架して回動可能に吊持
されている。そして、前蓋係止部材１１は、支軸
１１ａに装着されるつる巻き状の前蓋係止用スプ
リング１２の付勢力によつて、前蓋係止部材１１
に形成されるロツク用突起１１ｃと解除用突起１
１ｄとが下ハーフ３の側壁３ａから外部へ突出し
て、ロツク用突起１１ｃが前蓋７に係合し、該前
蓋７を閉状態に保持している。 Front lid spring 10 made of the helical spring
At the corner of the lower half 3 corresponding to
is rotatably suspended by supporting shafts 11a, 11b on both upper sides thereof being suspended from ribs 3b, 3c of the lower half 3. The front lid locking member 11 is rotated by the biasing force of the helical front lid locking spring 12 attached to the support shaft 11a.
The locking protrusion 11c and the release protrusion 1 formed in
1d protrudes outward from the side wall 3a of the lower half 3, and a locking protrusion 11c engages with the front lid 7 to hold the front lid 7 in a closed state.
前記つる巻きばねからなる前蓋スプリング１０
は、回動支軸８に引掛けられる一端１０ａと、他
端側の腕部１０ｂと、一端１０ａと腕部１０ｂと
の間に形成されるコイル部１０ｃとで形成され、
腕部１０ｂは、上ハーフ２の内面に当接する屈曲
部１０ｄを有している。この前蓋スプリング１０
は、コイル部１０ｃを回動支軸８に外嵌し、一端
１０ａを該支軸８に突設した係止突起８ａに外部
から引掛けて、腕部１０ｂを上ハーフ２の内面に
形成したガイド溝１３に遊嵌させて、前蓋７を上
ハーフ２に仮止めする。この仮止め状態の前蓋７
をもつた上ハーフ２と、下ハーフ３とをビス１４
にて螺着して、磁気テープカセツト１を構成す
る。 Front lid spring 10 made of the helical spring
is formed by one end 10a hooked on the rotation support shaft 8, an arm portion 10b on the other end side, and a coil portion 10c formed between the one end 10a and the arm portion 10b,
The arm portion 10b has a bent portion 10d that comes into contact with the inner surface of the upper half 2. This front lid spring 10
The coil portion 10c is externally fitted onto the rotation support shaft 8, and one end 10a is hooked from the outside onto a locking protrusion 8a protruding from the support shaft 8, thereby forming an arm portion 10b on the inner surface of the upper half 2. The front cover 7 is temporarily fixed to the upper half 2 by loosely fitting it into the guide groove 13. The front cover 7 in this temporarily fixed state
Connect upper half 2 with screw 14 and lower half 3 with screw 14.
The magnetic tape cassette 1 is constructed by screwing them together.
しかしながら、つる巻きばねからなる前蓋スプ
リング１０は、上述の如くコイル部１０ｃの一端
１０ｂを回動支軸８の係止突起８ａに引掛ける形
とし、他端に屈曲部１０ｄを有する腕部１０ｂを
形成するため、形状が特異で加工技術を要するこ
とからコスト的に不利であつた。
However, the front cover spring 10 made of a helical spring has one end 10b of the coil portion 10c hooked on the locking protrusion 8a of the rotation support shaft 8 as described above, and the arm portion 10b having a bent portion 10d at the other end. It was disadvantageous in terms of cost because it had a unique shape and required processing technology.
また、この前蓋スプリング１０を介しての前蓋
７と上ハーフ２の連結状態が不安定なため、前蓋
７の開閉が円滑でなかつた。 Further, since the connection between the front cover 7 and the upper half 2 via the front cover spring 10 is unstable, the front cover 7 cannot be opened and closed smoothly.
さらに、前蓋７は上ハーフ２に、前蓋係止部材
１１は下ハーフ３に夫々設けられるが、上ハーフ
２を下ハーフ３に組付けた際には、前蓋スプリン
グ１０と前蓋係止用スプリング１２とが近接位置
に配置されるにもかかわらず、両者を必要として
いた。 Further, the front lid 7 is provided on the upper half 2, and the front lid locking member 11 is provided on the lower half 3, but when the upper half 2 is assembled to the lower half 3, the front lid spring 10 and the front lid locking member 11 are provided on the lower half 3. Even though the stop spring 12 is located close to the stopper spring 12, both are required.
そこで本考案は、前蓋スプリングの製作が容易
でコストダウンが図れ、前蓋と上ハーフとの連結
状態を安定せしめ、かつ前蓋スプリングにて前蓋
係止用スプリングをも兼用できる磁気テープカセ
ツトを提供することを目的としている。 Therefore, the present invention has been developed to create a magnetic tape cassette in which the front cover spring is easy to manufacture and costs can be reduced, the connection between the front cover and the upper half is stabilized, and the front cover spring can also be used as a front cover locking spring. is intended to provide.
本考案は、上述の目的に鑑みなされたもので、
上ハーフと下ハーフでとカセツト本体を形成し、
該カセツト本体に収納された巻回リールからカセ
ツト本体の前面に繰り出される磁気テープを上ハ
ーフに軸支される前蓋で開閉可能に覆い、該前蓋
の回動支軸に係止される前蓋スプリングにより前
蓋を常時閉方向へ付勢せしめ、前記下ハーフに支
軸にて回動可能に懸架される前蓋係止部材を備え
た磁気テープカセツトにおいて、前記前蓋スプリ
ングは板ばねであり、該前蓋スプリングは一端が
前記回動支軸に係止されているとともに他端が上
ハーフに摺動可能に圧接され、かつ前記前蓋スプ
リングの一端と他端との間に下ハーフ側に膨出す
る湾曲部を有し、前記前蓋係止部材には、下ハー
フの側壁から外部に突出するロツク用突起及び解
除用突起と、被押圧部とが形成され、前記前蓋ス
プリングの湾曲部を該被押圧部に圧接して、前記
ロツク用突起が前蓋を係止する方向に前蓋係止部
材が常時付勢されていることを特徴とする。
This invention was made in view of the above objectives,
The upper half and lower half form the cassette body,
The magnetic tape that is unwound from the winding reel housed in the cassette main body to the front of the cassette main body is covered in an openable and closable manner by a front cover that is pivotally supported on the upper half, and before it is locked to the rotation shaft of the front cover. In the magnetic tape cassette, the front lid is always biased in the closing direction by a lid spring, and the front lid locking member is rotatably suspended on the lower half by a support shaft, and the front lid spring is a plate spring. One end of the front lid spring is locked to the pivot shaft, the other end is slidably pressed against the upper half, and a lower half is connected between one end and the other end of the front lid spring. The front lid locking member has a curved portion that bulges to the side, and the front lid locking member is formed with a locking projection and a releasing projection that project outward from the side wall of the lower half, and a pressed portion, and the front lid locking member is formed with a pressed portion. The front cover locking member is characterized in that the front cover locking member is always biased in a direction in which the locking protrusion locks the front cover by pressing the curved portion of the front cover against the pressed portion.
尚、前蓋スプリングに用いられる板ばねの材質
としては、弾性を有する部材であれば特に限定し
ないが、例えば通常のばね用鋼板やステンレス鋼
板等の弾性のある金属板が好ましい。 The material of the leaf spring used for the front lid spring is not particularly limited as long as it is an elastic member, but is preferably an elastic metal plate such as a normal spring steel plate or a stainless steel plate.
したがつて、板ばねからなる前蓋スプリングに
よつて、前蓋は常時閉方向に付勢されるととも
に、前蓋係止部材も前蓋スプリングの湾曲部にて
前蓋を係止する方向に常時付勢される。
Therefore, the front lid spring made of a plate spring always biases the front lid in the closing direction, and the front lid locking member also moves in the direction of locking the front lid at the curved portion of the front lid spring. Always energized.
以下、本考案の一実施例を第１図乃至第３図に
基づいて説明する。
An embodiment of the present invention will be described below with reference to FIGS. 1 to 3.
前蓋７の側板７ｃの内面には、前蓋スプリング
２０を係止する長軸状の回動支軸１８が突接さ
れ、該回動支軸１８は、先端部に軸方向のスリツ
ト１８ａが形成されている。前蓋スプリング２０
は、ばね用鋼板やステンレス鋼板等の弾性を有す
る金属製の板ばねで形成したもので、回動支軸１
８のスリツト１８ａに挿入される一端２０ａと、
上ハーフ２に摺動可能に圧接される他端２０ｂ
と、一端２０ａと他端２０ｂとの間に下ハーフ３
側に膨出する湾曲部２０ｃとを有している。そし
て、前蓋スプリング２０は、回動支軸１８の略半
周を抱持する一端２０ａをスリツト１８ａに挿入
して係止され、他端２０ｂが上ハーフ２に摺動可
能に圧接して取付けられる。この際、他端２０ｂ
は、その左右両側を上ハーフ２の内面に形成した
ガイド溝２３にガイドされるとともに、先端面を
ストツパ突起２５に当接させるようにしてもよ
い。 An elongated pivot shaft 18 for locking the front cap spring 20 is in contact with the inner surface of the side plate 7c of the front lid 7, and the pivot shaft 18 has an axial slit 18a at its tip. It is formed. Front lid spring 20
is a plate spring made of elastic metal such as a spring steel plate or a stainless steel plate.
one end 20a inserted into the slit 18a of No. 8;
The other end 20b is slidably pressed against the upper half 2
and the lower half 3 between one end 20a and the other end 20b.
It has a curved portion 20c that bulges out to the side. The front cover spring 20 is attached by inserting one end 20a that holds approximately half the circumference of the rotation support shaft 18 into the slit 18a and locking it, and the other end 20b being slidably pressed into contact with the upper half 2. . At this time, the other end 20b
may be guided by guide grooves 23 formed on the inner surface of the upper half 2 on both left and right sides thereof, and may also have its distal end surface abut against the stopper protrusion 25 .
尚、前記前蓋スプリング２０は。例えば、硬度
がビツカース硬さHv400以上、好ましくはHv500
以上で、弾性を有し、且つ鋼性に富むSUS301H
やSUS301EH（エキストラハード）等のステンレ
ス系、或いはリボン鋼等の幅2.0〜5.0mm、厚さ
0.08〜0.12mm程度の鋼板を用いる。 Incidentally, the front lid spring 20 is as follows. For example, the hardness is more than Bitkers hardness Hv400, preferably Hv500
With the above, SUS301H has elasticity and is rich in steel properties.
Stainless steel such as SUS301EH (extra hard), or ribbon steel with a width of 2.0 to 5.0 mm and a thickness
A steel plate of approximately 0.08 to 0.12 mm is used.
前蓋スプリング２０の取付け部と対応する下ハ
ーフ３の隅部には、前蓋７を閉状態に係止する前
蓋係止部材２１が、その上部両側の支軸２１ａ，
２１ｂを下ハーフ３のリブ３ｂ，３ｃに懸架して
回動可能に吊持されている。この前蓋係止部材２
１には、下ハーフ３の側壁３ａから外部に突出す
るロツク用突起２１ｃ及び解除用突起２１ｄと、
前蓋スプリング２０の湾曲部２０ｃが圧接される
例えば突条の被押圧部２１ｅとが形成されてい
る。 At the corner of the lower half 3 corresponding to the attachment part of the front lid spring 20, there is a front lid locking member 21 that locks the front lid 7 in the closed state.
21b is suspended from the ribs 3b, 3c of the lower half 3 so as to be rotatable. This front lid locking member 2
1 includes a locking protrusion 21c and a release protrusion 21d protruding from the side wall 3a of the lower half 3;
A pressed portion 21e, for example a protrusion, is formed to which the curved portion 20c of the front lid spring 20 is pressed.
そして、該被押圧部２１ｅを前蓋スプリング２
０の湾曲部２０ｃにて押圧される前記前蓋係止部
材２１は、支軸２１ａ，２１ｂを支点に下ハーフ
３の側壁３ａ方向に付勢され、ロツク用突起２１
ｃ及び解錠用突起２１ｄが前記側壁３ａから外部
に突出し、ロツク用突起２１ｃが前蓋７に係合し
て該前蓋７を閉状態に保持するもので、VTRの
作用爪が解除用突起２１ｄを押動すると、上記係
合状態が解除される。 Then, the pressed portion 21e is pressed against the front lid spring 2.
The front lid locking member 21 pressed by the curved portion 20c of 0 is biased toward the side wall 3a of the lower half 3 using the support shafts 21a and 21b as fulcrums, and the locking protrusion 21
c and an unlocking protrusion 21d protrude outward from the side wall 3a, and the locking protrusion 21c engages with the front cover 7 to hold the front cover 7 in a closed state, and the operating claw of the VTR is connected to the release protrusion. When 21d is pushed, the above-mentioned engaged state is released.
本実施例は以上のように構成されるもので、磁
気テープカセツト１をVTRに装填して前蓋７が
開かれる動作と連動して、前蓋スプリング２０を
係止した回動支軸１８が回動し、該回動支軸１８
に前蓋スプリング２０が巻き込まれてゆき、湾曲
部２０ｃが上ハーフ２側に小さく後退して、他端
２０ｂが上ハーフ２の内面を摺動して回動支軸１
８側へ後退する。 The present embodiment is constructed as described above, and in conjunction with the operation of loading the magnetic tape cassette 1 into a VTR and opening the front cover 7, the rotation support shaft 18, which locks the front cover spring 20, rotates. The rotation support shaft 18
The front cover spring 20 is wound up, the curved part 20c moves back slightly toward the upper half 2, and the other end 20b slides on the inner surface of the upper half 2, and the rotation support shaft 1
Retreat to the 8th side.
そして、磁気テープカセツト１をVTRから取
り出すと、前蓋スプリング２０の復元力により、
回動支軸１８が前記開方向動作とは逆に回動し
て、前蓋スプリング２０の他端２０ｂが回動支軸
１８とは反対側へ前進して、前蓋７が閉位置に戻
り、前蓋係止部材２１は前蓋スプリング２０の湾
曲部２１ｃにて押動され、ロツク用突起２１ｃが
前蓋７に係合して、前蓋７が閉状態に保持され
る。 When the magnetic tape cassette 1 is removed from the VTR, the restoring force of the front cover spring 20 causes
The pivot shaft 18 rotates in the opposite direction to the opening direction, the other end 20b of the front lid spring 20 moves forward to the side opposite to the pivot shaft 18, and the front lid 7 returns to the closed position. The front lid locking member 21 is pushed by the curved portion 21c of the front lid spring 20, the locking protrusion 21c engages with the front lid 7, and the front lid 7 is held in the closed state.
本実施例は以上のように、前蓋スプリング２０
を板ばねで形成するから、従来の如く前蓋スプリ
ングにコスト高なつる巻きばねを用いることな
く、板ばね材を所要長さに切断して曲げ加工する
のみで容易に形成でき、且つ安価である。また、
湾曲部２０ｃの弾発力により、閉状態の前蓋７の
遊びを少なくすることができる。そして、前蓋７
が従来より確実に長期間に亘つて安定して開閉で
きる。またデツキ装着時においては、前蓋スプリ
ングにつる巻きばねを使用した従来のカセツトで
は、つる巻きばねを介しての前蓋と上ハーフの連
結状態が不安定なために、カセツトの前蓋が開か
なかつたり、閉じなかつたりすることがあつた
が、本考案ではこのようなトラブルは発生しな
い。 As described above, in this embodiment, the front cover spring 20
Since it is formed from a leaf spring, it can be easily formed by simply cutting the leaf spring material to the required length and bending it, instead of using an expensive helical spring for the front cover spring as in the past. be. Also,
The elastic force of the curved portion 20c can reduce the play of the front lid 7 in the closed state. And the front lid 7
can be opened and closed more reliably and stably over a long period of time than before. Furthermore, when the deck is attached, with conventional cassettes that use a helical spring for the front lid spring, the connection between the front lid and the upper half via the helical spring is unstable, making it difficult for the cassette's front lid to open. However, with the present invention, such troubles do not occur.
さらに、この前蓋スプリング２０を利用して前
蓋係止部材２１を付勢するようになしたから、従
来例で示した前蓋係止用スプリング１２が不要と
なつて部品点数を減少でき、更に大幅なコストダ
ウンが図れる。 Furthermore, since the front cover spring 20 is used to bias the front cover locking member 21, the front cover locking spring 12 shown in the conventional example is not necessary, and the number of parts can be reduced. Furthermore, significant cost reductions can be achieved.
本考案の磁気テープカセツトは以上説明したよ
うに、カセツト本体の前蓋の回動支軸に係止され
る前蓋スプリングを板ばねにて一端と他端との間
に下ハーフ側に膨出する湾曲部を存して形成し、
該前蓋スプリングの一端を前記回動支軸に係止す
るとともに他端を上ハーフに摺動可能に圧接し、
かつ前記前蓋スプリングの一端と他端との間に下
ハーフ側に膨出する湾曲部を有し、前記前蓋係止
部材に、下ハーフの側壁から外部に突出するロツ
ク用突起及び解除用突起と、被押圧部とを形成
し、前記前蓋スプリングの湾曲部を該被押圧部に
圧接して、前記ロツク用突起が前蓋を係止する方
向に前蓋係止部材を常時付勢しているので、板ば
ね材を所要長さに切断して曲げ加工するのみで前
蓋係止用スプリング兼用の前蓋スプリングを容易
に形成できて、製品コストの減少を図ることがで
きる。しかも、前蓋スプリングを利用して前蓋係
止部材を付勢するようにしたから、従来用いてい
た前蓋係止用スプリングが不要となり部品点数を
減少でき、さらに大幅なコストダウンが図れる。
As explained above, in the magnetic tape cassette of the present invention, the front cover spring, which is locked to the pivot shaft of the front cover of the cassette body, is bulged toward the lower half side between one end and the other end using a leaf spring. forming a curved portion,
one end of the front lid spring is locked to the rotation support shaft, and the other end is slidably pressed against the upper half;
and a curved portion that bulges toward the lower half between one end and the other end of the front lid spring, and the front lid locking member has a locking protrusion and a release protrusion that protrudes from the side wall of the lower half. a projection and a pressed portion are formed, and the curved portion of the front lid spring is pressed against the pressed portion to constantly bias the front lid locking member in a direction in which the locking projection locks the front lid. Therefore, the front lid spring that also serves as the front lid locking spring can be easily formed by simply cutting the leaf spring material to the required length and bending it, thereby reducing the product cost. Moreover, since the front cover spring is used to bias the front cover locking member, the conventionally used front cover locking spring is no longer necessary, and the number of parts can be reduced, resulting in a further significant cost reduction.
また、前蓋スプリングの湾曲部の弾発力によ
り、閉状態の前蓋の遊びが少なくなり、前蓋と上
ハーフとの連結状態が安定し、前蓋の開閉が円滑
に行なうことができるとともに、前蓋スプリング
が前記の如く湾曲しているために、カセツトの前
蓋の開閉動作が長期間、確実に安定して行えるよ
うになつた。 In addition, the elastic force of the curved part of the front lid spring reduces play in the front lid in the closed state, stabilizes the connection between the front lid and the upper half, and allows the front lid to open and close smoothly. Since the front cover spring is curved as described above, the opening and closing operations of the front cover of the cassette can be performed reliably and stably for a long period of time.
第１図乃至第３図は本考案の一実施例を示すも
ので、第１図は第２図の−断面図、第２図は
上ハーフを内面側から見た要部の断面底面図、第
３図は同要部の断面側面図、第４図及至第６図は
従来例を示し、第４図は磁気テープカセツトを下
ハーフ側から見た一部切欠き背面図、第５図は第
４図の−断面図、第６図は第４図の切欠き部
に対応する下ハーフ隅部の平面図である。
１……磁気テープカセツト、２……上ハーフ、
３……下ハーフ、４……カセツト本体、５……磁
気テープ、６……巻回リール、７……前蓋、１
２，２２……前蓋係止部材、１８……回動支軸、
１８ａ……回動支軸１８のスリツト、２０……前
蓋スプリング、２０ａ……一端、２０ｂ……他
端、２０ｃ……湾曲部、２１……前蓋係止部材、
２１ａ，２１ｂ……支軸、２１ｃ……ロツク用突
起、２１ｄ……解除用突起、２１ｅ……被押圧
部、２３……ガイド溝、２５……ストツパ突起。
1 to 3 show an embodiment of the present invention; FIG. 1 is a sectional view taken from FIG. 2; FIG. Fig. 3 is a cross-sectional side view of the essential parts, Figs. 4 to 6 show a conventional example, Fig. 4 is a partially cutaway rear view of the magnetic tape cassette seen from the lower half side, and Fig. 5 is 4 is a cross-sectional view, and FIG. 6 is a plan view of the lower half corner corresponding to the notch in FIG. 4. 1... Magnetic tape cassette, 2... Upper half,
3... Lower half, 4... Cassette body, 5... Magnetic tape, 6... Winding reel, 7... Front cover, 1
2, 22...Front lid locking member, 18...Rotation shaft,
18a...Slit of rotation support shaft 18, 20...Front cover spring, 20a...One end, 20b...Other end, 20c...Curved portion, 21...Front cover locking member,
21a, 21b...Spin shaft, 21c...Lock protrusion, 21d...Release protrusion, 21e...Pressed portion, 23...Guide groove, 25...Stopper protrusion.
Claims (1)
形成し、該カセツト本体４に収納された巻回リー
ル６からカセツト本体４の前面に繰り出される磁
気テープ５を上ハーフ２に軸支される前蓋７で開
閉可能に覆い、該前蓋７の回動支軸１８に係止さ
れる前蓋スプリング２０により前蓋７を常時閉方
向へ付勢せしめ、前記下ハーフ３に支軸２１ａ，
２１ｂにて回動可能に懸架される前蓋係止部材２
１を備えた磁気テープカセツト１において、前記
前蓋スプリング２０は板ばねであり、該前蓋スプ
リング２０は一端２０ａが前記回動支軸１８に係
止されているとともに他端２０ｂが上ハーフ２に
摺動可能に圧接され、かつ前記前蓋スプリング２
０の一端２０ａと他端２０ｂとの間に下ハーフ３
側に膨出する湾曲部２０ｃを有し、前記前蓋係止
部材２１には、下ハーフ３の側壁３ａから外部に
突出するロツク用突起２１ｃ及び解除用突起２１
ｄと、被押圧部２１ｅとが形成され、前記前蓋ス
プリング２０の湾曲部２０ｃを該被押圧部２１ｅ
に圧接して、前記ロツク用突起２１ｃが前蓋７を
係止する方向に前蓋係止部材２１が常時付勢され
ていることを特徴とする磁気テープカセツト。 The upper half 2 and the lower half 3 form a cassette main body 4, and the magnetic tape 5, which is unwound from the winding reel 6 housed in the cassette main body 4 to the front of the cassette main body 4, is placed before being pivotally supported by the upper half 2. The front lid 7 is covered in an openable and closable manner by a front lid spring 20 that is locked to a pivot shaft 18 of the front lid 7, and the front lid 7 is always biased in the closing direction.
Front lid locking member 2 rotatably suspended at 21b
1, the front lid spring 20 is a plate spring, and one end 20a of the front lid spring 20 is locked to the rotation support shaft 18, and the other end 20b is connected to the upper half 2. The front lid spring 2 is slidably pressed against the front lid spring 2.
0 between one end 20a and the other end 20b of the lower half 3
The front lid locking member 21 includes a locking protrusion 21c and a release protrusion 21 that protrude outward from the side wall 3a of the lower half 3.
d and a pressed portion 21e are formed, and the curved portion 20c of the front lid spring 20 is pressed against the pressed portion 21e.
A magnetic tape cassette characterized in that a front lid locking member 21 is always biased in a direction in which the locking protrusion 21c locks the front lid 7 by being pressed against the front lid 7.
Priority Applications (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1986160740U JPH0210631Y2 (en) | 1986-08-25 | 1986-10-20 | |
| EP87905480A EP0287664B1 (en) | 1986-08-25 | 1987-08-24 | Cassette for magnetic tapes |
| PCT/JP1987/000624 WO1988001787A1 (en) | 1986-08-25 | 1987-08-24 | Cassette for magnetic tapes |
| US07/196,222 US4951167A (en) | 1986-08-25 | 1987-08-24 | Magnetic tape cassette with improved front cover supporting mechanism |
| US07/512,127 US5041939A (en) | 1986-08-25 | 1990-04-17 | Magnetic tape cassette with leaf-shaped spring door closure mechanism |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12916586 | 1986-08-25 | ||
| JP1986160740U JPH0210631Y2 (en) | 1986-08-25 | 1986-10-20 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6372783U JPS6372783U (en) | 1988-05-16 |
| JPH0210631Y2 true JPH0210631Y2 (en) | 1990-03-15 |
Family
ID=33455122
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1986160740U Expired JPH0210631Y2 (en) | 1986-08-25 | 1986-10-20 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0210631Y2 (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS571343U (en) * | 1980-05-30 | 1982-01-06 | ||
| JPS5758626U (en) * | 1980-09-25 | 1982-04-06 |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5168514U (en) * | 1974-11-26 | 1976-05-31 |
-
1986
- 1986-10-20 JP JP1986160740U patent/JPH0210631Y2/ja not_active Expired
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS571343U (en) * | 1980-05-30 | 1982-01-06 | ||
| JPS5758626U (en) * | 1980-09-25 | 1982-04-06 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6372783U (en) | 1988-05-16 |
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