Sony Corporation

Sony Corportion

Takashi Ota

Shuichi Ota

Hiroshi Fujii

Sunao Kushiro

Hiroshi Ozaki

Jun Sasaki

Osamu Koizumi

Kiyoshi Urayama

Masahiro Makino

Osamu Taguchi

Tadao Igarashi

Toshikazu Konno

Taizo Fukuda

Takayasu Hirano

Hiromichi Itahashi

Seiji Nihei

Hiroyuki Mizuhira

Takeo Oba

Each lock portion () has a front portion () including an anchoring pawl () and a back portion () extending in a direction opposite to the front portion. Therefore, when a slider () withdraws, each back portion comes into contact with the inside surface of a back wall () of a cassette shell () and each lock portion rotates in an unlocking direction. A bottom surface () defining each recess between engaging teeth () has a central portion which protrudes in a chevron shape. A corner of each protrusion has tapered surfaces () and (). An anchoring pawl of each lock portion has a flat surface that comes into contact with one inclined surface () of a chevron-shaped portion of any one of the recesses and one tapered surface () of a protrusion disposed behind the adjacent recess.

Reel lock mechanism of tape cassette and tape cassette

Each lock portion () has a front portion () including an anchoring pawl () and a back portion () extending in a direction opposite to the front portion. Therefore, when a slider () withdraws, each back portion comes into contact with the inside surface of a back wall () of a cassette shell () and each lock portion rotates in an unlocking direction. A bottom surface () defining each recess between engaging teeth () has a central portion which protrudes in a chevron shape. A corner of each protrusion has tapered surfaces (') and (&#x2033;). An anchoring pawl of each lock portion has a flat surface that comes into contact with one inclined surface (&#x2032;) of a chevron-shaped portion of any one of the recesses and one tapered surface (&#x2032;) of a protrusion disposed behind the adjacent recess.

Reel lock mechanism of tape cassette, and tape cassette

In a tape cassette in which a mouth portion opened in forward and up-and-down directions is provided at the front portion of a cassette shell accommodating therein tape reels and having a magnetic tape wound therearound, a part of the magnetic tape is located so as to traverse the front end of the mouth portion, and a front lid for covering the front side of the magnetic tape is provided, a slider is provided so as to be freely movable forwardly and downwardly, each side surface portion of the slider along the side surface of the front lid has a lid-support portion at the front-end portion thereof and a main-surface portion located so as to be farther outward than the lid-support portion, the front lid has a front-surface portion covering the front surface of the tape-shaped recording medium, and side-surface portions projecting backwardly from both the ends of said front surface portion, the side surface portions being freely-rotatably supported to the lid-support portion of the slider, and the front-end portions of the slider and the side-surface portions of the front lid have overlap portions and which are overlapped with each other in the right-and-left direction.

Tape cassette having lid and slider overlapping portions

In a tape cassette having a slider which is freely forward and backward movably provided to a cassette shell in which a tape reel having a tape-shaped recording medium wound therearound is accommodated, the cassette shell comprises an upper shell constituting substantially the upper side portion thereof and a lower shell constituting substantially the lower side portion thereof, and the upper shell and the lower shell are temporarily coupled to each other through the slider by butting the lower shell and the upper shell against each other after the upper shell and the slider are coupled to each other and moving the slider, and then the upper shell and the lower shell are really coupled to each other.

Tape cassette and tape cassette fabricating method

Tape cassette receiving housing

A tape cassette comprises a cassette proper for containing therein a recording tape. The cassette proper is constructed of a plastic. At least one positioning opening with a collar therearound is provided in the cassette proper. An annular bearing member is fitted in the positioning opening to reinforce the same. The annular bearing member is constructed of a relatively highly wear resistant material which has a relatively low sliding friction.

Tape cassette with reduced wear of positioning holes

A tape cassette includes an erasure preventing plug comprising a circular head portion, a first leg portion, a second leg portion having a diameter less than the first leg portion, and a locking projection. A lower surface of the circular head portion where it joins the first leg portion is angled. The outer diameter of the first leg portion where it connects with the lower angled surface of the circular head portion is determined so as to be generally equal to an inner diameter of a coil spring used for biasing the erasure preventing plug when the erasure preventing plug and the coil spring are mounted in a cassette casing when the coil spring is compressed so as to be in contact with the angled lower surface of the circular head portion.

Tape cassette with erasure preventing plug having a head portion with a

A magnetic tape cassette comprises a compact reel lock mechanism which includes a pair of reel lock arms engaging with outer peripheries of a pair of tape reels, a sliding member serving as a cover for a single opening through which an end of an optical tape end detecting element is inserted into the cassette casing, a cam member which provided on the sliding member for rotating the pair of reel lock arms, and a guide member guiding said sliding member. When the tape cassette is out of a recording and/or reproducing apparatus, the single opening is closed by the sliding member and the reel lock arms restrict rotation of reels. Conversely, when the tape cassette is inserted into the recording and/or reproducing apparatus, the sliding member is pushed up by the end of the optical detecting element and as a result the cam member moves upward along with said sliding member. The opening, therefore, becomes open, and simultaneously the cam member releases engagement between the reel lock arms and the peripheries of tape reels.

Magnetic tape cassette having reel locks controlled by an optical tape

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Miyagi, Japan

Takashi Ota