JPH0322585Y2 - - Google Patents
Info
- Publication number
- JPH0322585Y2 JPH0322585Y2 JP1986129634U JP12963486U JPH0322585Y2 JP H0322585 Y2 JPH0322585 Y2 JP H0322585Y2 JP 1986129634 U JP1986129634 U JP 1986129634U JP 12963486 U JP12963486 U JP 12963486U JP H0322585 Y2 JPH0322585 Y2 JP H0322585Y2
- Authority
- JP
- Japan
- Prior art keywords
- spring
- rotating shaft
- free end
- fixed end
- holding part
- 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
- 239000000463 material Substances 0.000 claims description 12
- 238000004804 winding Methods 0.000 description 7
- 238000005452 bending Methods 0.000 description 6
- 230000008602 contraction Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000005489 elastic deformation Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 1
- 238000009751 slip forming Methods 0.000 description 1
Landscapes
- Springs (AREA)
Description
【考案の詳細な説明】
〔産業上の利用分野〕
本考案は、板ばね材で形成されるスプリングで
あつて、例えばビデオテープレコーダ(以下
VTRという)等に使用される磁気テープカセツ
トの前蓋スプリングに好適なスプリングに関す
る。[Detailed description of the invention] [Industrial field of application] The present invention is a spring formed of a leaf spring material, and is used in, for example, a video tape recorder (hereinafter referred to as
This invention relates to a spring suitable for the front cover spring of magnetic tape cassettes used in VTRs, etc.
VTR用の磁気テープカセツトに使用されるス
プリングとして、例えば実開昭59−149282号や実
開昭60−89685号に示されるコイルスプリングが
知られている。
As springs used in magnetic tape cassettes for VTRs, coil springs are known, for example, as shown in Japanese Utility Model Application No. 59-149282 and No. 60-89685.
このうち、前者のコイルスプリングは、線材の
中間部にコイル部を形成し、一端を前蓋の係止突
起に係止される自由端とし、他端側をロツクレバ
ーの外側へ迂回させて、その端部をロツクレバー
下端の突起部分を押圧する自由端としている。ま
た、後者に示されるコイルスプリングは、線材の
一端に、カセツト本体の回動軸と係合してこの回
動軸と一体に回動する固定端と、該固定端に連続
して回動軸に外装されるコイル部とを持ち、他端
にカセツト本体の段部と当接する自由端を持つて
いる。 Among these, the former coil spring has a coil part formed in the middle part of the wire, one end is a free end that is locked to the locking protrusion on the front cover, and the other end is detoured to the outside of the lock lever. The end is a free end that presses against the protrusion at the lower end of the lock lever. In addition, the coil spring shown in the latter has a fixed end at one end of the wire that engages with the rotating shaft of the cassette body and rotates together with this rotating shaft, and a rotating shaft continuous to the fixed end. The cassette has a coil portion that is sheathed on the cassette body, and a free end that comes into contact with the stepped portion of the cassette body at the other end.
このように構成されるコイルスプリングは、線
材で形成されたコイル部が、前蓋の開閉によつて
拡縮した際に、コイル部の線材同士が互いに干渉
しあつたり、回動軸に絡みついて、所定の付勢力
が得られないことがある。また、細い線材である
ため、組付時や作動中の反力によつて撓みや塑性
変形を生じやすい欠点がある。
A coil spring constructed in this way has the problem that when the coil portion made of wire rods expands and contracts by opening and closing the front cover, the wire rods of the coil portions interfere with each other or get entangled with the rotation shaft. A predetermined urging force may not be obtained. In addition, since it is a thin wire, it has the disadvantage of being susceptible to bending and plastic deformation due to reaction forces during assembly and operation.
本考案は、このような実情に鑑みてなされたも
ので、その目的とするところは、常に安定した付
勢力が得られ、また撓みや塑性変形を生じにくい
スプリングを提供することにある。 The present invention was developed in view of the above circumstances, and its purpose is to provide a spring that can always provide a stable biasing force and is less prone to bending or plastic deformation.
上述の目的に従い、本考案のスプリングは、板
ばね材によつて形成されたスプリングであつて、
該スプリングは、回動軸に形成されたスリツトに
係止される固定端と、該固定端に連続して回動軸
の略半周を包持する包持部と、該包持部に連続し
て包持部のカーブと反対側にカーブする湾曲部
と、該湾曲部に連続して他の部材に支承され、前
記回動軸が回動した際に他の部材を摺動する自由
端とを備えたことを特徴としている。
In accordance with the above-mentioned purpose, the spring of the present invention is a spring formed of a leaf spring material, and
The spring includes a fixed end that is engaged with a slit formed in the rotating shaft, a holding part that extends around the fixed end and surrounds approximately half the circumference of the rotating shaft, and a holding part that is continuous with the holding part. a curved portion that curves in a direction opposite to the curve of the holding portion; and a free end that is supported by another member in continuation with the curved portion and slides on the other member when the rotation shaft rotates. It is characterized by having the following.
上記の構成によれば、回動軸をスプリング巻込
み方向に回動させると、湾曲部の包持部近傍部分
が回動軸の外周に徐々に巻きつき、湾曲部が伸び
ながら弾性変形してゆき、自由端が他の部材上を
固定端方向に摺動する。次に、この状態から回動
軸に加えられている回動力を解放すると、スプリ
ングの復元力で、回動軸の外周に巻きついている
湾曲部の包持部近傍部分が、回動軸の外周から離
れてゆきながら、回動軸を上記と反対方向に回動
させ、湾曲部が形状に復帰するとともに、自由端
も他の部材上を反固定端方向に摺動しながら元の
位置に戻つて、回動軸を原位置に復帰させる。
According to the above configuration, when the rotating shaft is rotated in the spring winding direction, the portion of the curved portion near the wrapping portion gradually wraps around the outer periphery of the rotating shaft, and the curved portion is elastically deformed as it stretches. Then, the free end slides on the other member toward the fixed end. Next, when the rotational force applied to the rotational shaft is released from this state, the restoring force of the spring causes the portion of the curved portion that wraps around the outer circumference of the rotational shaft near the wrapping portion to The rotating shaft is rotated in the opposite direction to the above while moving away from the member, and the curved part returns to its shape, and the free end also returns to its original position while sliding on the other member in the direction opposite to the fixed end. Then, return the rotating shaft to its original position.
また、前記回動軸を反スプリング巻込み方向に
回動させると、前記包持部が回動軸の外周から
徐々に離れ、湾曲部が膨らみながら弾性変形して
ゆき、自由端を押動して、他の部材上を反固定端
方向に摺動させる。次に、この状態から回動軸に
加えられている回動力を解放すると、スプリング
の復元力で、回動軸の周囲から離れている包持部
が、回動軸の周囲に巻きつきながら、回動軸を上
記と反対方向に回動させ、湾曲部が原形状に復帰
するとともに、自由端も他の部材上を固定端方向
に摺動しながら元の位置に戻つて、回動軸を原位
置に復帰させる。 Furthermore, when the rotating shaft is rotated in the direction opposite to the spring winding direction, the holding part gradually separates from the outer periphery of the rotating shaft, and the curved part expands and deforms elastically, pushing the free end. and slide it on another member in the direction opposite to the fixed end. Next, when the rotational force applied to the rotational shaft is released from this state, the restoring force of the spring causes the wrapping part that is separated from the rotational shaft to wrap around the rotational shaft. The rotating shaft is rotated in the opposite direction to the above, and the curved part returns to its original shape, and the free end also returns to its original position while sliding on other members toward the fixed end, and the rotating shaft is rotated. Return to original position.
さらに、スプリングの上記両作用において、湾
曲部や自由端で別の部材を作動させることもでき
る。 Furthermore, in both of the above-mentioned actions of the spring, it is also possible to actuate other elements at the bend or at the free end.
以下、本考案の一実施例を第1図に基づいて説
明する。
An embodiment of the present invention will be described below with reference to FIG.
スプリング1は、板ばね材によつて形成された
スプリングであつて、該スプリング1は、回動軸
2に形成されたスリツト2aに係止される固定端
1aと、該固定端1aに連続して回動軸2の略半
周を包持する包持部1bと、該包持部1bに連続
して包持部1bのカーブと反対側にカーブする湾
曲部1cと、該湾曲部1cに連続して、図示しな
い他の部材のガイド面に支承され、前記回動軸2
が回動した際に上記ガイド面を摺動する自由端1
dとを備えている。また、自由端1dは、他の部
材のガイド面との摩擦抵抗を減少して摺動作用を
円滑に行なうために、湾曲部1cのカーブと反対
にカーブする小さい円弧状に形成されている。 The spring 1 is a spring formed of a plate spring material, and the spring 1 has a fixed end 1a that is engaged with a slit 2a formed in the rotation shaft 2, and a fixed end 1a that is continuous with the fixed end 1a. A holding part 1b that surrounds approximately half the circumference of the rotating shaft 2, a curved part 1c that is continuous with the holding part 1b and curved on the opposite side to the curve of the holding part 1b, and a curved part 1c that is continuous with the curved part 1c. The rotating shaft 2 is supported on a guide surface of another member (not shown).
Free end 1 that slides on the guide surface when rotated
d. Furthermore, the free end 1d is formed into a small arcuate shape that curves opposite to the curve of the curved portion 1c in order to reduce the frictional resistance with the guide surface of other members and to perform the sliding operation smoothly.
上記固定端1aと湾曲部1c及び自由端1d
は、それぞれが作用部であつて、スプリング1
は、回動軸2に固定端1aを係止し、自由端1d
をガイド面に支承させて取付けられ、この取付け
状態から、回動軸2をスプリング巻込み方向に回
動させると、湾曲部1cの包持部1b近傍部分が
回動軸2の外周に徐々に巻きつき、湾曲部1cが
伸びながら弾性変形してゆき、自由端1dがガイ
ド面を固定端方向に摺動する。次に、この状態か
ら回動軸2に加えられている回動力を解放する
と、スプリング1の復元力で、回動軸2の外周に
巻きついている湾曲部1cの包持部1b近傍部分
が、回動軸2の周囲から離れてゆきながら、回動
軸2を上記と反対方向に回動させ、湾曲部1cが
原形状に復帰するとともに、自由端1dも、ガイ
ド面を反固定端方向に摺動しながら元の位置に戻
つて、回動軸2を原位置に復帰させる。 The fixed end 1a, the curved part 1c and the free end 1d
are acting parts, and the spring 1
, the fixed end 1a is locked to the rotation shaft 2, and the free end 1d
is supported on the guide surface, and when the rotating shaft 2 is rotated in the spring winding direction from this installed state, the portion of the curved portion 1c near the wrapping portion 1b gradually extends to the outer periphery of the rotating shaft 2. The curved portion 1c is elastically deformed while being wound around, and the free end 1d slides on the guide surface toward the fixed end. Next, when the rotational force applied to the rotational shaft 2 is released from this state, the restoring force of the spring 1 causes the portion of the curved portion 1c that is wrapped around the outer circumference of the rotational shaft 2 near the wrapping portion 1b to While moving away from the surroundings of the rotation shaft 2, the rotation shaft 2 is rotated in the opposite direction to the above, and the curved portion 1c returns to its original shape, and the free end 1d also moves the guide surface in the direction opposite to the fixed end. It returns to its original position while sliding, and the rotation shaft 2 is returned to its original position.
また、回動軸2を反スプリング巻込み方向に回
動させると、包持部1bが回動軸の外周から離
れ、湾曲部1cが膨らみながら弾性変形してゆ
き、自由端1dを押動して、ガイド面を反固定端
方向に摺動させる。次に、この状態から回動軸2
に加えられている回動力を解放すると、スプリン
グ1の復元力で、回動軸2の周囲から離れている
包持部1bが、回動軸2の周囲に巻きつながら、
回動軸2を上記と反対方向に回動させ、湾曲部1
cが原形状に復帰し、自由端1dも、ガイド面を
固定端方向に摺動しながら元の位置に戻つて、回
動軸2を原位置に復帰させる。 Furthermore, when the rotating shaft 2 is rotated in the anti-spring winding direction, the enclosing portion 1b separates from the outer periphery of the rotating shaft, and the curved portion 1c expands and deforms elastically, pushing the free end 1d. and slide the guide surface in the direction opposite to the fixed end. Next, from this state, the rotation axis 2
When the rotational force applied to is released, the restoring force of the spring 1 causes the wrapping part 1b, which is separated from the rotational shaft 2, to wrap around the rotational shaft 2.
Rotate the rotation shaft 2 in the opposite direction to the above, and
c returns to its original shape, and the free end 1d also returns to its original position while sliding on the guide surface toward the fixed end, thereby returning the rotating shaft 2 to its original position.
さらに、上記両スプリングの作用において、必
要とするならば、湾曲部1cや自由端1dで別の
部材を作動させることもできる。 Furthermore, in the action of the two springs described above, if necessary, another member can be actuated at the curved portion 1c or the free end 1d.
次に、このスプリング1を、VTR用の磁気テ
ープカセツトに用いた応用例を第2図乃至第5図
により説明する。 Next, an application example in which this spring 1 is used in a magnetic tape cassette for a VTR will be explained with reference to FIGS. 2 to 5.
図中、第2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3図は第2図の
−断面図、第4図は第3図の前蓋を開けた状
態の断面図、第5図は要部の断面側面図を示すも
ので、磁気テープカセツト3は、上ハーフ4と下
ハーフ5とでカセツト本体6が形成され、該カセ
ツト本体6内に磁気テープ7を巻装する供給及び
巻取りリール8,9が回転可能に収納されてい
る。VTR挿入側となるカセツト本体6の前部に
は、両リール8,9から繰り出されてテープガイ
ド部6a,6aの前面を走行する磁気テープ7を
開閉可能に覆う前蓋10が被着されている。 In the figure, Figure 2 is a partially cutaway rear view of the magnetic tape cassette seen from the lower half side, Figure 3 is a cross-sectional view of Figure 2, and Figure 4 is the same as Figure 3 with the front cover opened. FIG. 5 shows a cross-sectional side view of the main part. The magnetic tape cassette 3 has an upper half 4 and a lower half 5 forming a cassette body 6, and a magnetic tape 7 inside the cassette body 6. Supply and take-up reels 8 and 9 for winding the material are rotatably housed. A front cover 10 is attached to the front part of the cassette body 6, which is the side where the VTR is inserted, to cover the magnetic tape 7, which is unwound from the reels 8 and 9 and runs on the front surfaces of the tape guide parts 6a and 6a, in an openable and closable manner. There is.
この前蓋10は、前板10aと天板10bの両
側に側板10c,10cを延設した平面コ字状に
形成され、両側板10c,10cの内側に突設し
た回動軸11,12を、上ハーフ4の側壁4a,
4aの前部側に形成した被着凹部4bに軸支して
取付けられるもので、一方の側板10cの内側に
突設される長軸の回動軸11には、前蓋10を閉
状態に保つ前記スプリング1が装着されている。 The front lid 10 is formed in a U-shape in plan with side plates 10c and 10c extending on both sides of a front plate 10a and a top plate 10b, and pivot shafts 11 and 12 protruding from the inside of both side plates 10c and 10c. , side wall 4a of upper half 4,
The front cover 10 is attached to a rotary shaft 11, which is a long shaft, and which is protruded from the inside of one side plate 10c. The spring 1 is installed to maintain the position.
上記スプリング1に対応する下ハーフ5の隅部
には、前蓋係止部材13が、上部の支軸13a,
13aを下ハーフ5のリブ5a,5aに吊持さ
れ、該前蓋係止部材13は、回動用の突片13b
がスプリング1の湾曲部1cに押動されて、ロツ
ク用突起13cと解除用突起13dとが下ハーフ
5の側壁5bから外部へ突出して設けられ、ロツ
ク用突起13cが前蓋10に係合して該蓋10を
閉状態に保持している。 At the corner of the lower half 5 corresponding to the spring 1, a front lid locking member 13 is attached to an upper support shaft 13a,
13a is suspended by the ribs 5a, 5a of the lower half 5, and the front lid locking member 13 is attached to a rotating projecting piece 13b.
is pushed by the curved portion 1c of the spring 1, and a locking projection 13c and a releasing projection 13d are provided to protrude outward from the side wall 5b of the lower half 5, and the locking projection 13c engages with the front cover 10. The lid 10 is held closed.
回動軸11の先端側にはスリツト14が穿設さ
れ、上記スプリング1は、湾曲部1cを下ハーフ
5側に配設して、固定端1aをスリツト14に係
止するとともに、包持部1bにて回動軸2の略半
周を包持し、上ハーフ4の内面に形成したガイド
面となるガイド溝15に遊嵌される自由端1dを
ストツパ突起16に当接させて前蓋10に取付け
られるもので、この前蓋10は、他方の回動軸1
2とともに上記回動軸11を上ハーフ4の装着凹
部4bに装着して、上ハーフ4に装着される。 A slit 14 is bored at the distal end side of the rotation shaft 11, and the spring 1 has the curved portion 1c disposed on the lower half 5 side, the fixed end 1a is locked in the slit 14, and the enclosing portion The free end 1d which is loosely fitted into the guide groove 15 which is formed on the inner surface of the upper half 4 and serves as a guide surface formed on the inner surface of the upper half 4 is brought into contact with the stopper protrusion 16, and the front cover 10 is closed. This front cover 10 is attached to the other rotating shaft 1.
2 and the rotation shaft 11 are mounted in the mounting recess 4b of the upper half 4, and the upper half 4 is mounted.
そして、磁気テープカセツト3をVTRに装填
して前蓋10が開かれると、この開き作動に伴つ
て、スプリング1を係止した回動支軸11が第3
図の時計方向(スプリング巻込み方向)に回動し
て、第4図に示す如く、回動軸11に湾曲部1c
の包持部1b近傍部分が回動軸2の外周に巻きつ
いてゆき、湾曲部1cが伸びながら上方に移動し
て前蓋係止部材13の突片13bから離れるとと
もに、自由端1dがストツパ突起16から離間し
て上ハーフ4のガイド溝15を回動軸方向に摺動
する。 Then, when the magnetic tape cassette 3 is loaded into the VTR and the front cover 10 is opened, the rotation support shaft 11 that locks the spring 1 moves to the third position as the front cover 10 opens.
The curved portion 1c is rotated in the clockwise direction (spring winding direction) in the figure, and the curved portion 1c is attached to the rotating shaft 11 as shown in FIG.
The portion near the holding portion 1b wraps around the outer periphery of the rotating shaft 2, and the curved portion 1c stretches and moves upwards to separate from the protrusion 13b of the front lid locking member 13, and the free end 1d engages with the stopper protrusion. 16 and slides in the guide groove 15 of the upper half 4 in the direction of the rotation axis.
次に、磁気テープカセツト3をVTRから取り
出して、前蓋10の開状態の係合が解除される
と、スプリング1の復元力で、回動軸2の外周に
巻きついている湾曲部1cの包持部1b近傍部分
が、回動軸2の周囲から離れてゆきながら、回動
軸2を第3図の反時計方向へ回動させ、湾曲部1
cが下方へ膨らんで原形状に復帰しながら、前蓋
係止部材13の突片13bを押動して、閉位置に
回動した前蓋10にロツク用突起13cを係合さ
せ、前蓋10を初期の開状態に保持するととも
に、自由端1dがガイド溝15を滑つてストツパ
突起16に再び当接する。 Next, when the magnetic tape cassette 3 is removed from the VTR and the open engagement of the front cover 10 is released, the restoring force of the spring 1 causes the wrap around the curved portion 1c wrapped around the outer periphery of the rotating shaft 2. While the portion near the holding portion 1b moves away from the periphery of the rotation shaft 2, the rotation shaft 2 is rotated counterclockwise in FIG.
c expands downward and returns to its original shape, while pushing the protrusion 13b of the front lid locking member 13 to engage the locking protrusion 13c with the front lid 10 that has been rotated to the closed position. 10 is held in the initial open state, and the free end 1d slides through the guide groove 15 and comes into contact with the stopper protrusion 16 again.
この応用例に用いたスプリング1は、以上のよ
うに、ストツパ突起16との当接と、回動軸11
の回動及び前蓋係止部材13の押動との3つの作
用力を併せ持つもので、従来夫々に設けていたス
プリングを1つとすることができ、部品点数を削
減してコストダウンが図れるとともに、配置スペ
ースを広くとれて設計の自由度を向上できる。 As described above, the spring 1 used in this application example is capable of contacting the stopper protrusion 16 and rotating the rotation shaft 11.
It combines the three forces of rotation and pushing of the front cover locking member 13, and the number of springs that were conventionally provided for each can be reduced to one, reducing the number of parts and reducing costs. , it is possible to increase the arrangement space and improve the degree of freedom in design.
ところで、スプリングに所望の付勢力を持たせ
るためには、板ばね材等の厚みや幅が設定される
ほか、所定の長さをとる必要があるが、本実施例
のスプリング1は、固定端1aと自由端1dとの
間に、回動軸2を略半周包持する包持部1bと、
包持部1bのカーブと反対のカーブを有する湾曲
部1cとを略S字状に連続形成したから、このカ
ーブ形状によつて、所定長さを確保でき、固定端
1aと自由端1dとの距離が短くなり、スプリン
グ1をコンパクトに形成できるとともに、スプリ
ング1の回動による弾性変形量は、その一部が湾
曲部1cの膨縮によつて吸収されるから、自由端
1dの移動量が小さくて済む。したがつて、スプ
リング1の配置スペースが小さくでき、設計の自
由度が大きく取れる。また板ばね材を所要長さに
切断して折曲するのみで製作できるから、製作が
容易で且つ安価である。 By the way, in order for the spring to have the desired biasing force, it is necessary to set the thickness and width of the leaf spring material, etc., and also to take a predetermined length. A holding part 1b that holds the rotating shaft 2 approximately half the circumference between the rotating shaft 1a and the free end 1d;
Since the curved part 1c having a curve opposite to the curve of the holding part 1b is continuously formed in a substantially S-shape, a predetermined length can be secured by this curved shape, and the length between the fixed end 1a and the free end 1d can be maintained. The distance is shortened, and the spring 1 can be formed compactly. Also, the amount of elastic deformation due to rotation of the spring 1 is partially absorbed by the expansion and contraction of the curved portion 1c, so the amount of movement of the free end 1d is reduced. It's small enough. Therefore, the space for arranging the spring 1 can be reduced, and the degree of freedom in design can be increased. Further, since the plate spring material can be manufactured by simply cutting and bending the leaf spring material to the required length, it is easy and inexpensive to manufacture.
さらに、線材のようなコイル部を持たない帯状
の板ばね材であるから、回動軸2,11上で互い
に干渉しあつたり、回動軸2,11に絡みつくこ
とがなく、設定された所定の付勢力を常に安定し
て発揮することができるとともに、撓みや塑性変
形が生じにくい。 Furthermore, since it is a strip-shaped leaf spring material that does not have a coil part like a wire rod, it does not interfere with each other on the rotation axes 2, 11 or get tangled with the rotation axes 2, 11, and the predetermined The biasing force can be exerted stably at all times, and bending and plastic deformation are less likely to occur.
尚、本考案のスプリングは、上記応用例で示し
た磁気テープカセツト以外にも、幅広い利用が可
能である。 The spring of the present invention can be used in a wide range of applications other than the magnetic tape cassette shown in the above application example.
本考案のスプリングは、以上説明したように、
板ばね材によつて形成され、回動軸のスリツトに
係止される固定端と、該固定端に連続して回動軸
の略半周包持する包持部と、該包持部に連続して
包持部のカーブと反対のカーブを有する湾曲部
と、該湾曲部に連続して他の部材に支承され、前
記回動軸が回動した際に他の部材に摺動する自由
端とを備えたから、包持部と湾曲部との略S字状
のカーブによつて、スプリングの所要長さを稼い
で、固定端と自由端との距離を短くして、スプリ
ング全体の長さをコンパクトに形成できるととも
に、スプリングの回動による弾性変形量は、その
一部が湾曲部の膨縮によつて吸収されるから、自
由端の移動量が小さくて済み、スプリングの配置
スペースを小さくできて、設計の自由度を向上す
ることができる。また板ばね材を所要長さに切断
して折曲するだけで製作できるから、製作が容易
で且つ安価である。
As explained above, the spring of this invention is
a fixed end formed of a leaf spring material and locked in the slit of the rotating shaft; a holding part continuous to the fixed end and surrounding approximately half the circumference of the rotating shaft; and a holding part continuous to the holding part. a curved portion having a curve opposite to the curve of the enclosing portion; and a free end that is supported by another member in continuation with the curved portion and slides on the other member when the rotation shaft rotates. Since it is equipped with a substantially S-shaped curve between the holding part and the curved part, the required length of the spring can be obtained, and the distance between the fixed end and the free end can be shortened, so that the overall length of the spring can be increased. In addition to being able to form a compact spring, the amount of elastic deformation due to rotation of the spring is partially absorbed by the expansion and contraction of the curved part, so the amount of movement of the free end is small, reducing the space for installing the spring. This increases the degree of freedom in design. Further, since the plate spring material can be manufactured by simply cutting and bending the leaf spring material to the required length, it is easy and inexpensive to manufacture.
さらに、線材のようなコイル部を持たないか
ら、回動軸上で互いに干渉しあつたり、回動軸に
絡みつくことがなく、設定された所定の付勢力を
常に安定して発揮することができ、また撓みや塑
性変形を生じにくい。 Furthermore, since it does not have a coil part like a wire rod, it does not interfere with each other on the rotation axis or get entangled with the rotation axis, and it is possible to always stably exert the predetermined biasing force. , and is less prone to bending or plastic deformation.
しかも、回動軸の略半周を包持部で包持するの
で、回動軸がいずれの方向に回動しても、回動軸
からの固定端の外れを防止し得ることができ、特
に回動軸が反スプリング巻込み方向へ回動した場
合に、固定端の外れを有効に防止できる。 Moreover, since approximately half the circumference of the rotating shaft is covered by the holding portion, the fixed end can be prevented from coming off from the rotating shaft even if the rotating shaft rotates in any direction. When the rotating shaft rotates in the direction opposite to the spring winding direction, the fixed end can be effectively prevented from coming off.
また、湾曲部や自由端で別の部材を作動させる
こともできる。 It is also possible to actuate another member at the curved portion or free end.
第1図は本考案のスプリングの一実施例を示す
斜視図、第2図乃至第5図はその応用例を示すも
ので、第2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3図は第2図の
−断面図、第4図は第3図の前蓋を開けた状態
の断面図、第5図は要部の断面側面図である。
1……スプリング、1a……固定端、1b……
包持部、1c……湾曲部、1d……自由端、2…
…回動軸、2a……スリツト、3……磁気テープ
カセツト、4……上ハーフ、4b……装着凹部、
5……下ハーフ、6……カセツト本体、7……磁
気テープ、10……前蓋、11……磁気テープカ
セツトの回動軸、13……前蓋係止部材、13b
……回動用の突片、15……ガイド溝、16……
ストツパ突起。
Fig. 1 is a perspective view showing an embodiment of the spring of the present invention, Figs. 2 to 5 show examples of its application, and Fig. 2 is a partial cutaway of a magnetic tape cassette seen from the lower half side. 3 is a cross-sectional view of FIG. 2, FIG. 4 is a cross-sectional view of FIG. 3 with the front cover opened, and FIG. 5 is a cross-sectional side view of the main parts. 1... Spring, 1a... Fixed end, 1b...
Wrapped part, 1c...Curved part, 1d...Free end, 2...
... Rotation shaft, 2a ... Slit, 3 ... Magnetic tape cassette, 4 ... Upper half, 4b ... Mounting recess,
5... Lower half, 6... Cassette main body, 7... Magnetic tape, 10... Front cover, 11... Magnetic tape cassette rotating shaft, 13... Front cover locking member, 13b
...Rotation protrusion, 15...Guide groove, 16...
Stotsupa protrusion.
Claims (1)
て、該スプリングは、回動軸に形成されたスリツ
トに係止される固定端と、該固定端に連続して回
動軸の略半周を包持する包持部と、該包持部に連
続して包持部のカーブと反対側にカーブする湾曲
部と、該湾曲部に連続して他の部材に支承され、
前記回動軸が回動した際に他の部材を摺動する自
由端とを備えたことを特徴とするスプリング。 The spring is made of a leaf spring material, and includes a fixed end that is engaged with a slit formed in the rotating shaft, and a fixed end that extends approximately half the circumference of the rotating shaft. a holding part that holds the holding part; a curved part that is continuous with the holding part and curves on the opposite side to the curve of the holding part; and supported by another member continuously with the curved part;
A spring comprising a free end that slides on another member when the rotation shaft rotates.
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1986129634U JPH0322585Y2 (en) | 1986-08-26 | 1986-08-26 | |
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 |
EP87905480A EP0287664B1 (en) | 1986-08-25 | 1987-08-24 | Cassette for magnetic tapes |
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 |
---|---|---|---|
JP1986129634U JPH0322585Y2 (en) | 1986-08-26 | 1986-08-26 |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS6336735U JPS6336735U (en) | 1988-03-09 |
JPH0322585Y2 true JPH0322585Y2 (en) | 1991-05-16 |
Family
ID=31026378
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP1986129634U Expired JPH0322585Y2 (en) | 1986-08-25 | 1986-08-26 |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH0322585Y2 (en) |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS4420231Y1 (en) * | 1966-09-07 | 1969-08-29 | ||
JPS6016384B2 (en) * | 1979-05-28 | 1985-04-25 | 株式会社クボタ | Manufacturing method of inorganic board material |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6016384U (en) * | 1983-07-14 | 1985-02-04 | ソニー株式会社 | tape cassette |
JPS6089685U (en) * | 1983-11-25 | 1985-06-19 | ソニー株式会社 | tape cassette |
-
1986
- 1986-08-26 JP JP1986129634U patent/JPH0322585Y2/ja not_active Expired
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS4420231Y1 (en) * | 1966-09-07 | 1969-08-29 | ||
JPS6016384B2 (en) * | 1979-05-28 | 1985-04-25 | 株式会社クボタ | Manufacturing method of inorganic board material |
Also Published As
Publication number | Publication date |
---|---|
JPS6336735U (en) | 1988-03-09 |
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