JPH056614Y2 - - Google Patents
Info
- Publication number
- JPH056614Y2 JPH056614Y2 JP18950086U JP18950086U JPH056614Y2 JP H056614 Y2 JPH056614 Y2 JP H056614Y2 JP 18950086 U JP18950086 U JP 18950086U JP 18950086 U JP18950086 U JP 18950086U JP H056614 Y2 JPH056614 Y2 JP H056614Y2
- Authority
- JP
- Japan
- Prior art keywords
- spring
- front cover
- support shaft
- front lid
- slit
- 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
- 230000002093 peripheral effect Effects 0.000 claims description 3
- 238000005452 bending Methods 0.000 description 4
- 210000000078 claw Anatomy 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000004804 winding 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、ビデオテープレコーダ（VTR）等
に使用される磁気テープカセツトのカセツト本体
前部に被着された前蓋を付勢する前蓋スプリング
の取付構造に関する。[Detailed description of the invention] [Industrial field of application] The present invention is a front cover that biases the front cover attached to the front part of the cassette body of a magnetic tape cassette used in a video tape recorder (VTR), etc. Regarding the spring mounting structure.
〔従来の技術〕
家庭用のVTRに使用される従来の磁気テープ
カセツトでは、カセツト本体からその前部に繰り
出される磁気テープを開閉可能に覆う前蓋が被着
され、この前蓋は前蓋スプリングによつて常時閉
方向に付勢されている。[Prior Art] Conventional magnetic tape cassettes used in home VCRs have a front cover that can be opened and closed to cover the magnetic tape that is fed out from the cassette body to the front of the cassette. It is always biased in the closing direction by.
第４図及び第５図は、この種の磁気テープカセ
ツトを示し、第４図に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を、第５図に第
４図の−断面図を示す。 4 and 5 show this type of magnetic tape cassette. FIG. 4 is a partially cutaway rear view of the magnetic tape cassette seen from the lower half side, and FIG. 5 is a cross-sectional view taken from the side shown in FIG. Show the diagram.
磁気テープカセツト１は、上ハーフ２と下ハー
フ３とで形成したカセツト本体４内に、磁気テー
プ５を巻回する供給リール６と巻取りリール７と
が収納され、VTR挿入側となるカセツト本体４
の前部には、両リール６，７から繰り出されて、
テープガイド部４ａ，４ａの前面を走行する磁気
テープ５を覆うための前蓋８が開閉可能に被着さ
れている。 The magnetic tape cassette 1 has a supply reel 6 for winding a magnetic tape 5 and a take-up reel 7 housed in a cassette body 4 formed by an upper half 2 and a lower half 3. 4
At the front part of the
A front cover 8 for covering the magnetic tape 5 running on the front surface of the tape guide parts 4a, 4a is attached so as to be openable and closable.
上記前蓋８は、前板８ａと天板８ｂの両側に側
板８ｃ，８ｃを延設し、該側板８ｃの内側に突設
した回動支軸９，１０を、上ハーフ２の側壁の前
部側に軸支して取付けられるもので、一方の回動
支軸９には、前蓋８を閉方向に付勢する前蓋スプ
リング１１が装着されている。 The front lid 8 has side plates 8c, 8c extending on both sides of the front plate 8a and the top plate 8b, and pivot shafts 9, 10 protruding from the inside of the side plates 8c. A front lid spring 11 is mounted on one rotation support shaft 9 to bias the front lid 8 in the closing direction.
この前蓋スプリング１１は、線ばね材を折曲し
て形成されるもので、コイル状の固定部１１ａを
回動支軸９に外嵌して、係止端１１ｂを該支軸９
に突設した係止ピン１２に係止し、自由端１１ｃ
を上ハーフ２の内面に形成したガイド溝１３に遊
嵌して取付けられる。 The front lid spring 11 is formed by bending a wire spring material, and a coil-shaped fixing part 11a is fitted onto the pivot shaft 9, and a locking end 11b is attached to the pivot shaft 9.
The free end 11c is locked to a locking pin 12 protruding from the
It is attached by loosely fitting into the guide groove 13 formed on the inner surface of the upper half 2.
そして、前蓋スプリング１１を装着した前蓋８
は、上ハーフ２の一方の側壁に形成した装着凹部
１４に回動支軸９を支持し、回動支軸１０を他方
の側壁の軸孔に軸支して上ハーフ２に仮止めさ
れ、両ハーフ２，３をビス１５で螺着してカセツ
ト本体４を構成したのち、前蓋スプリング１１の
トーシヨン力によつて、前蓋８が常時閉方向に付
勢される。 Then, the front lid 8 with the front lid spring 11 attached
is temporarily fixed to the upper half 2 by supporting the rotation support shaft 9 in a mounting recess 14 formed in one side wall of the upper half 2, and supporting the rotation support shaft 10 in a shaft hole in the other side wall, After the two halves 2 and 3 are screwed together with screws 15 to form the cassette body 4, the front lid 8 is normally biased in the closing direction by the torsion force of the front lid spring 11.
また、上記前蓋スプリング１１に対応する下ハ
ーフ３の隅部には、前蓋係止部材１６が上部両側
の支軸１６ａ，１６ａを下ハーフ３のリブ３ａ，
３ａに回動可能に吊持されており、一方の支軸１
６ａに装着される前蓋係止部材用スプリング１７
の付勢力によつて、前蓋を閉状態に保持してい
る。 In addition, at the corner of the lower half 3 corresponding to the front lid spring 11, a front lid locking member 16 connects the support shafts 16a, 16a on both sides of the upper part to the ribs 3a of the lower half 3,
3a, and is rotatably suspended from one support shaft 1.
Spring 17 for front lid locking member attached to 6a
The front lid is held closed by the biasing force of the front lid.
しかしながら上述の前縁スプリングでは、形状
が特異であることから、割高な外注品となつてコ
ストダウンが図りにくく、また装着も面倒であつ
た。
However, since the above-mentioned leading edge spring has a unique shape, it is a relatively expensive outsourced product, making it difficult to reduce costs, and it is also troublesome to install.
本考案は、かかる事情を背景にしてなされたも
ので、前蓋スプリングを廉価で容易に形成し、そ
の装着を容易にした磁気テープカセツトを提供す
ることを目的としている。 The present invention was developed against the background of the above circumstances, and an object of the present invention is to provide a magnetic tape cassette in which a front cover spring is easily formed at a low cost, and the front cover spring is easily installed.
本考案は、上記の目的を達成するため、テープ
リールを収納したカセツト本体の前部を開閉可能
に覆う前蓋の回動支軸に、該前蓋を閉方向に付勢
する前蓋スプリングの固定部を係止した磁気テー
プカセツトの前蓋スプリング取付構造において、
前記前蓋スプリングを板ばねで形成して、その固
定部の端部に係止端を折曲形成し、一方前記回動
支軸に先端に開口する軸方向のスリツトを形成し
て、該スリツトに前記前蓋スプリングの固定部を
回転支軸の先端から挿通し、スリツトの側方より
突出する係止端を回動支軸の外周面に係止したこ
とを特徴とするものである。
In order to achieve the above object, the present invention has a front cover spring that biases the front cover in the closing direction, which is attached to the pivot shaft of the front cover that opens and closes the front part of the cassette body in which the tape reel is housed. In the front cover spring mounting structure of a magnetic tape cassette with a fixed part locked,
The front cover spring is formed of a plate spring, and a locking end is bent at the end of the fixed part, and an axial slit opening at the tip is formed in the rotation support shaft, and the slit is The fixing portion of the front cover spring is inserted through the tip of the rotation support shaft, and the locking end protruding from the side of the slit is locked to the outer peripheral surface of the rotation support shaft.
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.
尚、前記従来例と同一構成部分については、同
一符号を付して詳細な説明を省略する。 Incidentally, the same components as those in the conventional example are given the same reference numerals and detailed explanations will be omitted.
上ハーフ２の前部に取付けられる前蓋８は、装
着凹部１４に支持される一方の回動支軸２０に、
該支軸２０の先端に開口するスリツト２０ａが軸
方向に設けられ、該スリツト２０ａに前蓋スプリ
ング２１が装着されている。 The front cover 8 attached to the front part of the upper half 2 is attached to one pivot shaft 20 supported by the mounting recess 14.
A slit 20a opening at the tip of the support shaft 20 is provided in the axial direction, and a front cover spring 21 is attached to the slit 20a.
上記スリツト２０ａは、前記前蓋スプリング２
１の厚さより広い開口幅と、前蓋スプリング２１
を所定位置にまで挿入できる深さを有している。 The slit 20a is connected to the front cover spring 2.
The opening width is wider than the thickness of 1, and the front lid spring 21
It has a depth that allows it to be inserted to a predetermined position.
一方前蓋スプリング２１は、所要長さに切断し
た板ばね材を折曲して形成されるもので、一端に
回動支軸２０に係止される直線状の固定部２１ａ
が回動支軸２０の直径と略同じ長さに形成され、
該固定部２１ａと他端の係止部２１ｂとの間にル
ープ状のスプリング部２１ｃと回動支軸２０の抱
持部２１ｄとが形成されており、固定部２１ａの
端部には係止端２１ｅが折曲形成されている。 On the other hand, the front lid spring 21 is formed by bending a leaf spring material cut to a required length, and has a linear fixed part 21a that is latched to the rotation support shaft 20 at one end.
is formed to have approximately the same length as the diameter of the rotation support shaft 20,
A loop-shaped spring portion 21c and a holding portion 21d of the rotation support shaft 20 are formed between the fixed portion 21a and the locking portion 21b at the other end, and the locking portion 21b is provided at the end of the fixed portion 21a. The end 21e is bent.
そして、前蓋スプリング２１を前記回動支軸２
０の先端側から、抱持部２１ｄを該支軸２０の外
周に抱持させながら固定部２１ａをスリツト２０
ａの設定深さまで挿入し、挿入後前蓋スプリング
２１を第１図の想像線の位置に回動して、係止端
２１ｅを回動支軸２０の外周面２０ｂに係止する
とともに、他端の係止部２１ｂを前蓋８の天板８
ｂの内面に係止して、スプリング部２１ｃを撓ま
せてスプリング力を持たせ、このスプリング力を
利用して固定部２１ａを回動支軸２０のスリツト
２０ａに弾発係止する。 Then, the front cover spring 21 is attached to the rotation support shaft 2.
The fixing part 21a is inserted into the slit 20 from the tip side of the support shaft 20 while holding the holding part 21d around the outer periphery of the support shaft 20.
After insertion, the front cover spring 21 is rotated to the position shown by the imaginary line in FIG. The end locking part 21b is attached to the top plate 8 of the front lid 8.
b, the spring portion 21c is bent to provide a spring force, and this spring force is used to elastically lock the fixed portion 21a to the slit 20a of the pivot shaft 20.
また、前蓋８を上ハーフに仮止めした際には、
上ハーフ２のガイド溝２２に遊嵌される前蓋スプ
リング２１の係止部２１ｂがストツパ突起２３に
当接し、その反力で固定部２１ａがスリツト２０
ａに圧接されて、前蓋スプリング２１は前蓋８の
開閉時にもガタ付きなくさらに確実に支持され
る。 Also, when the front lid 8 is temporarily attached to the upper half,
The locking part 21b of the front cover spring 21, which is loosely fitted into the guide groove 22 of the upper half 2, comes into contact with the stopper protrusion 23, and the reaction force causes the fixing part 21a to move into the slit 20.
The front lid spring 21 is in pressure contact with the front lid 8, so that it is supported more reliably without wobbling even when the front lid 8 is opened and closed.
前蓋スプリング２１の装着部と対応する下ハー
フ３の隅部には、前蓋係止用の前蓋係止部材２４
が、上部両側の支軸２４ａ，２４ａを下ハーフ３
のリブ３ａ，３ａに回動可能に吊持されており、
該前蓋係止部材２４には、前蓋スプリング２１の
スプリング部２１ｃの中間部に押圧される突片２
４ｂと、下ハーフ３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（図示せず）とが設け
られ、前蓋８がロツク用突起と係合して閉状態が
保持されている。 A front lid locking member 24 for locking the front lid is provided at a corner of the lower half 3 corresponding to the mounting portion of the front lid spring 21.
However, the support shafts 24a, 24a on both sides of the upper part are connected to the lower half 3.
It is rotatably suspended from the ribs 3a, 3a of
The front lid locking member 24 has a protrusion 2 that is pressed against the middle part of the spring portion 21c of the front lid spring 21.
4b, and a locking protrusion and a release protrusion (not shown) projecting outward from the side wall of the lower half 3, and the front lid 8 is engaged with the locking protrusion to maintain the closed state.
そして、以上のように構成された磁気テープカ
セツト１をVTRに装着すると、VTRの作用爪が
解除用突起を押動して前蓋係止部材２４を前蓋ス
プリング２１のスプリング部２１ｃの押圧力に抗
して回動し、係合状態を解除されて前蓋８が開か
れると、前蓋スフリング２１を係止した回動支軸
２０は第３図において時計方向に回動し、前蓋ス
プリング２１が該支軸２０に巻き込まれて、スプ
リング部２１ｃ中間のループ形状が上方に後退す
る。 When the magnetic tape cassette 1 configured as described above is mounted on a VTR, the working claw of the VTR pushes the release protrusion and the front cover locking member 24 is moved by the pressing force of the spring portion 21c of the front cover spring 21. When the engagement state is released and the front lid 8 is opened, the rotation support shaft 20 that locks the front lid suffling 21 rotates clockwise in FIG. The spring 21 is wound around the support shaft 20, and the intermediate loop shape of the spring portion 21c retreats upward.
また、磁気テープカセツト１をVTRから取り
出して、前蓋８の開状態が解除されると、下方へ
脹らむ前蓋スプリング２１のスプリング部２１ｃ
の復元力により、回動支軸２０が第３図の反時計
方向に回動され、前蓋８が閉位置に付勢されると
ともに、スプリング部２１ｃの中間部が前蓋係止
部材２４の突片２４ｂを押圧して、前蓋８が閉状
態に保持される。 Furthermore, when the magnetic tape cassette 1 is removed from the VTR and the open state of the front cover 8 is released, the spring portion 21c of the front cover spring 21 expands downward.
Due to the restoring force, the rotation support shaft 20 is rotated counterclockwise in FIG. The front lid 8 is held closed by pressing the protruding piece 24b.
以上のように本実施例によれば、所要長さに切
断した板ばね材を折曲するのみで前蓋スプリング
２１を安価で容易に形成でき、磁気テープカセツ
ト１を廉価に提供できる。 As described above, according to this embodiment, the front cover spring 21 can be formed easily and inexpensively by simply bending a leaf spring material cut to a required length, and the magnetic tape cassette 1 can be provided at a low cost.
さらにこの前蓋スプリング２１は、固定部２１
ａを回動支軸２０の先端からスリツト２０ａに挿
通して、該スリツト２０ａの側方から突出する係
止端２１ｅを回動支軸２０の外周面２０ｂに係止
するのみで脱落なく容易に取付けでき、また前蓋
８を上ハーフ２に仮止めした際には、固定部２１
ａに前蓋スプリング２１自身のスプリング力が働
いて弾発係止されるから、取付けをさらに確実に
することができる。 Further, this front lid spring 21 is attached to a fixed portion 21
a into the slit 20a from the tip of the rotation support shaft 20, and by simply locking the locking end 21e protruding from the side of the slit 20a to the outer circumferential surface 20b of the rotation support shaft 20, it is easy to prevent it from falling off. When the front cover 8 is temporarily attached to the upper half 2, the fixing part 21
Since the spring force of the front cover spring 21 itself acts on the front cover spring 21 so that the front cover spring 21 is resiliently locked, the attachment can be made more secure.
また、本実施例の前蓋スプリング２１は、前蓋
係止部材２４の押圧を兼ねるから、従来のように
前蓋係止部材用のスプリングを用いる必要がな
く、部品点数の削減によつて、さらにコストダウ
ンと組付け作業性の向上を図ることができる。 Further, since the front lid spring 21 of this embodiment also serves as a press for the front lid locking member 24, there is no need to use a spring for the front lid locking member as in the conventional case, and by reducing the number of parts, Furthermore, it is possible to reduce costs and improve assembly workability.
尚、回動支軸やスリツトあるいは前蓋スプリン
グの形状は上記実施例に限定されるものではな
く、磁気テープカセツトの種類や形状等により適
宜決定される。 It should be noted that the shape of the pivot shaft, slit, or front cover spring is not limited to the above-mentioned embodiment, but can be appropriately determined depending on the type and shape of the magnetic tape cassette.
また、前蓋係止部材用スプリングは前記従来例
と同様に別のスプリングを用いてもよい。 Further, as the spring for the front lid locking member, another spring may be used as in the conventional example.
本考案の磁気テープカセツトの前蓋スプリング
取付構造は、以上説明したように、前蓋スプリン
グを板ばねで形成して、その固定部の端部に係止
端を折曲形成し、回動支軸に形成されたスリツト
に前蓋スプリングの固定部を回動支軸の先端から
挿通して、スリツトの側方より突出する係止端を
回動支軸の外周面に係止させたから、従来の如く
コスト高なつる巻き状の線ばね材を用いることな
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、これにより仕掛かりコス
トを低減できてコストダウンが図れる。
As explained above, the front cover spring mounting structure of the magnetic tape cassette of the present invention is such that the front cover spring is formed of a plate spring, and the locking end is bent at the end of the fixed part to support rotation. The fixed part of the front cover spring is inserted through the slit formed in the shaft from the tip of the pivot shaft, and the locking end protruding from the side of the slit is locked to the outer circumferential surface of the pivot shaft. It can be easily formed by simply cutting the leaf spring material to the required length and bending it, without using expensive helical wire spring material, which reduces in-process costs and reduces costs. I can figure it out.
また、回動支軸のスリツトに前蓋スプリングの
固定部を挿通し、回動支軸の外周面に係止端を係
止するだけで脱落なく確実に装着でき、前蓋開閉
時に連動して伸縮する際にも係止状態を確実に保
持できる。 In addition, by simply inserting the fixed part of the front cover spring into the slit of the rotation support shaft and locking the locking end on the outer circumferential surface of the rotation support shaft, it can be installed securely without falling off, and the front cover spring is linked when opening and closing. The locked state can be reliably maintained even when expanding and contracting.
第１図乃至第３図は本考案の一実施例を示し、
第１図は前蓋の要部と前蓋スプリングの斜視図、
第２図は前蓋を被着した上ハーフの要部を内面側
から見た断面背面図、第３図は第２図の−断
面図、第４図及び第５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、８……前
蓋、８ｃ……側板、２０……回動支軸、２０ａ…
…スリツト、２０ｂ……外周面、２１……前蓋ス
プリング、２１ａ……固定部、２１ｅ……係止
端。
1 to 3 show an embodiment of the present invention,
Figure 1 is a perspective view of the main parts of the front lid and the front lid spring.
FIG. 2 is a cross-sectional rear view of the main part of the upper half with the front lid attached, seen from the inner side, FIG. 3 is a cross-sectional view of FIG. 2, and FIGS. 4 and 5 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 a cross-sectional view taken from the side shown in FIG. 4. 1... Magnetic tape cassette, 2... Upper half,
3...Lower half, 4...Cassette body, 8...Front cover, 8c...Side plate, 20...Rotation shaft, 20a...
...slit, 20b...outer peripheral surface, 21...front lid spring, 21a...fixing part, 21e...locking end.
Claims (1)
開閉可能に覆う前蓋の回動支軸に、該前蓋を閉方
向に付勢する前蓋スプリングの固定部を係止した
磁気テープカセツトの前蓋スプリング取付構造に
おいて、前記前蓋スプリングを板ばねで形成し
て、その固定部の端部に係止端を折曲形成し、一
方前記回動支軸に先端に開口する軸方向のスリツ
トを形成して、該スリツトに前記前蓋スプリング
の固定部を回転支軸の先端から挿通し、スリツト
の側方より突出する係止端を回動支軸の外周面に
係止したことを特徴とする磁気テープカセツトの
前蓋スプリング取付構造。 A front cover of a magnetic tape cassette, in which a fixed part of a front cover spring that biases the front cover in the closing direction is locked to a pivot shaft of the front cover that opens and closes the front part of a cassette body that houses a tape reel. In the spring mounting structure, the front lid spring is formed of a leaf spring, and a locking end is bent at the end of the fixed part, and an axial slit opening at the tip is formed on the rotation support shaft. The fixing part of the front cover spring is inserted into the slit from the tip of the rotation support shaft, and the locking end protruding from the side of the slit is locked to the outer peripheral surface of the rotation support shaft. Front cover spring mounting structure for magnetic tape cassettes.
Priority Applications (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18950086U JPH056614Y2 (en) | 1986-12-08 | 1986-12-08 | |
| 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 (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18950086U JPH056614Y2 (en) | 1986-12-08 | 1986-12-08 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6396673U JPS6396673U (en) | 1988-06-22 |
| JPH056614Y2 true JPH056614Y2 (en) | 1993-02-19 |
Family
ID=31141860
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP18950086U Expired - Lifetime JPH056614Y2 (en) | 1986-08-25 | 1986-12-08 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH056614Y2 (en) |
-
1986
- 1986-12-08 JP JP18950086U patent/JPH056614Y2/ja not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6396673U (en) | 1988-06-22 |