JPS63222378A - Tape cassette - Google Patents

Abstract

PURPOSE:To secure the protection of a tape by providing a blockade body to cover a reel shaft inserting hole apart from a sliding lid for covering a notched part of the lower surface of a tape cassette. CONSTITUTION:At the time of using a tape, a turn lid 12 is turned upward against a repulsive force of a torsion coil spring 23 by a turn lid pushing-up means to open an opening part 7 at the front of the cassette, thus enabling the notched part 8 to be inserted and also the tape 4 to be drawn out of the forward side of the tape cassette. At the same time, since the blockade bodies 14 and 15 are also turned in an interlocking movement with sliding arms 27 and 28 of a sliding member 29, the reel shaft inserting holes 10 and 11 are also opened, so that reel shafts are fitted into reels 5 and 6 in the tape cassette. At the time of housing the tape, the turn lid 12 is turned downward against a drag of the spring 23 by releasing the turn lid pushing-up means to close the opening part 7, and projections such as a cassette holder, etc., are released and then the sliding member 29 is slid forward against a drag of a compression spring 37 to close the notched part 8. At this time, the blockade bodies 14 and 15 are also turned in the interlocking movement with the sliding member 29 to close the inserting holes 10 and 11.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a tape cassette most suitable for use in a magnetic recording/reproducing device such as a video tape recorder.

BACKGROUND OF THE INVENTION Conventionally, a tape cassette used in a magnetic recording/reproducing device such as a video tape recorder is provided with an opening on the front surface thereof, and a notch is provided on the bottom surface of the tape cassette in communication with the opening. When using a tape, the tape can be loaded into a predetermined tape running position by inserting the tape loading guide of the magnetic recording/reproducing device into the notch and pulling it out along with the tape from the opening to the front of the tape cassette. . In addition, a pair of left and right reel shaft insertion holes are provided in the bottom wall of the lower half of the bottom surface of the tape cassette, and when a tape is used, the reel shaft of the magnetic recording and reproducing device is inserted through the reel shaft insertion hole, and the reel in the tape cassette is inserted into the reel shaft insertion hole. The reel is mounted in the reel shaft receiving hole of the reel, and the reel can be rotated by the reel shaft.

By the way, in the past, a rotatable lid was provided on the front surface of the opening to prevent the tape from being accidentally exposed outside the tape cassette through the opening, causing damage or attracting dust. There is. In addition, if the lower flange and reel shaft receiving hole of the reel stored in the tape cassette are exposed from the reel shaft insertion hole, the reel can be easily touched from outside the tape cassette, thereby preventing play in the reel. This easily occurs when the end surface of the tape wound on the reel comes into contact with the top and bottom flanges of the reel, causing damage.
This causes poor tracking, etc. when the tape is running. Regarding this point as well, the published utility model
As shown in Japanese Patent No. 54277, in addition to the rotating lid, a slidable sliding lid is provided on the lower surface of the tape cassette to integrally cover the notch and the reel shaft insertion hole, thereby improving the sealing performance of the cassette. A tape cassette has been devised that further improves the quality of the tape and prevents damage to the tape and the adhesion of dust.

Problems to be Solved by the Invention However, with the above configuration, if the reel shaft insertion hole is relatively large with respect to the bottom surface of the tape cassette, as in the case of a tape cassette for a video tape recorder, one sliding There was a problem in that the reel shaft insertion hole could not be opened and closed sufficiently with the lid alone.

In view of this, the present invention provides a tape cassette having a closing means that allows the tape and reel to be completely sealed inside the cassette housing even when the reel shaft insertion hole is relatively large with respect to the lower surface of the tape cassette. The purpose is to

Means for Solving the Problems The present invention provides a tape cassette with a rotatable lid on the front surface that covers the opening, and a sliding lid that can freely slide on the lower surface of the lower half to cover the notch. The tape cassette further includes a closing body for closing a pair of reel shaft insertion holes provided in the bottom wall of the lower half, and the closing body is configured to interlock with the sliding lid.

Operation The tape cassette of the present invention has the above-described configuration, so that when the tape is not in use, the downwardly biased rotating lid closes the opening, and the forward biased sliding lid closes the notch. A closing body interlocking with the sliding lid closes the reel shaft insertion hole, and when recording or reproducing a tape, the rotating lid is rotated by an appropriate rotating lid pushing means to close the reel shaft insertion hole. The opening is opened, and the sliding lid is slid by a protrusion provided on a cassette holder or the like to open the notch, and the closing body works in conjunction with the sliding lid to open the reel shaft insertion hole. do.

Examples Examples of the tape cassette of the present invention will be described below.

FIG. 1 is an exploded perspective view of the tape cassette of this embodiment seen from above. Figure 2 is an internal plan view (a) of the tape cassette of this embodiment excluding the reel when the tape is not in use.
and bottom view (b), both the notch on the lower surface of the tape cassette and the reel shaft insertion hole are in a closed state. Similarly, FIG. 3 shows an internal plan view (a) and a bottom view (a) of the tape cassette when the tape is used for recording or playback.
b), both the cutout and the reel shaft insertion hole are in an open state.

The tape cassette 1 is a casing composed of an upper half 2 and a lower half 3, and houses therein a pair of left and right reels 5.6 on which a tape 4 is wound. The front surface of this tape cassette is provided with an opening 7, and the bottom surface is provided with a notch 8 that communicates with this opening 7. When using a tape, the tape cassette is inserted into the notch 8 from the bottom surface of the tape cassette for use in a magnetic recording/reproducing device. Insert the loading post (not shown) and
The tape 4 can be pulled out to the front of the tape cassette through the opening 7. A reel shaft (not shown) of a magnetic recording/reproducing device is attached to the bottom wall 9a of the tape cassette, that is, the bottom wall 9a of the lower half 3.
．． A pair of left and right reel shaft insertion holes 10 and 11 for engaging with the reel shaft 6 are provided. These openings 7, notches 8, and reel shaft insertion holes 10.11 are connected to a rotating lid 12 and a sliding lid 13, which will be described below, when the tape is not used.
and a pair of closure bodies 14 and 15, respectively.

The rotating lid 12 has a U-shaped cross section, and fulcrum pins 18 and 19 are integrally provided on the side plates 16 and 17 at both left and right ends, and the fulcrum pins 18 and 19 are connected to the lower half side walls. 9
The lid is fitted into a rotary lid support hole 20.21 with an open upper end provided in C, and is pivotally supported by being sandwiched between the side wall 22b of the upper half 2 and can be rotated in the vertical direction. A torsion coil spring 23 is wound around either one of the fulcrum pins 18 or 19 of the rotary lid 12, and the torsion coil spring 23 biases the rotary lid 12 downward to open the opening on the front surface of the tape cassette. 7 is always closed.

On the other hand, the sliding lid 13 is integrally formed with the sliding side plates 24 and 25, the stepped sliding portion 26, and the sliding arms 27 and 28, and constitutes one sliding member 29. sliding side plate 24,
25 is provided on both left and right ends of the sliding lid 13 that covers the notch 8, and a protrusion 30.31 having a certain length is provided inside the sliding side plate 24.25 to form a lower half side wall 9C. The lower half bottom wall 9 is fitted into the sliding guide grooves 32 and 33 of
It is designed to be able to slide in the same plane as b.

In addition, a stepped sliding part 26 is fixed to the upper center of the sliding part 1i13, so that it can slide while coming into contact with a sliding guide part 34 provided in the notch 8 at the center of the lower half bottom wall 9b. It has become. Here, the sliding lid 13 is biased up and down with respect to the tape cassette by the projections 30.31 and the stepped sliding portion 26. Note that the bottom walls 9a and 9b of the lower half are in two stages, and a sliding lid 1 is provided on the bottom surface of the lower half 3.
3, the bottom surface of the tape cassette has a smooth surface with no steps, allowing smooth installation of the tape cassette into a magnetic recording/reproducing device or the like. In this stepped sliding portion 26, the sliding member 29
It enters into the tape cassette through a notch 8 on the bottom surface of the lower half 3. A cylindrical spring locking portion 35 is integrally provided at the rear end of the stepped sliding portion 26 in the tape cassette, and a cylindrical spring locking portion 35 is also provided at the inverted central portion of the lower half rear wall 9d opposite to this. A spring locking portion 36 is integrally provided. One of the spring locking portions 35 or 36 has a convex shape and the other has a concave shape, and when completely fitted, the position in the vertical direction is defined, and the sliding member 29 is directed toward the rear surface of the tape cassette. It also serves as a stopper. Further, a spring 37 is inserted and locked into both spring locking portions 35 and 36, and is compressed in advance so as to always close the cutout portion 8. The sliding force of the sliding member 29 toward the front of the tape cassette is as follows:
When the upper half 2 and the lower half 3 are combined, the front surfaces of the protrusions 30.31 on the inside of the left and right sliding side plates 24.25 correspond to the sliding locking pieces provided at both left and right ends of the front surface of the upper half 2. This is done by being locked by 38 and 39. Thin plate-like sliding arms 27.28 extend from the stepped sliding portion 26 in this tape cassette to the left and right in a plane parallel to the bottom half wall 9a, and the sliding arms 27.28 are provided on the sliding arms 27.28. Interlocking guide pins 40.41 allow interlocking with the closures 14, 15.

The closure body 14.15 is in the form of a thin plate, and is pivotally supported within the tape cassette by rotation fulcrum pins 42, 43 provided on the bottom wall 9a of the lower half in a plane parallel to the bottom wall 9b of the lower half. It can be rotated. In addition, this closure body 14.1
5 is configured to be sandwiched between the lower half bottom wall 9a and the sliding arm 27.28, and the interlocking guide groove 44.4
5, the sliding arm 27.28 is connected to an interlocking guide bin 40.41 provided on the lower surface, and as the sliding lid 13 slides toward the rear surface of the tape cassette to open the notch 8, the sliding arm 27. In conjunction with the interlocking guide pin 40.41 of the sliding arm 27.28 that abuts on the guide grooves 44, 45,
It rotates around the rotation fulcrum pins 42 and 43 to open the reel shaft insertion hole 10.11.

By the way, the left and right corner reels 5 and 6 are connected to the lower half bottom wall 9a.
Rotating fulcrum bins 42, 43 and reel support stand 4 provided in
6.47 and the lower half bottom wall 9b, even if the sliding member 29 slides or the closing body 14.15 rotates, the sliding arms 27, 28 and the closing body 14.15 will not close to the reel 5.47.
It is supported at an appropriate height from the lower half bottom wall 9a so as not to contact the lower surface of the lower half. Both reels 5 and 6
The wound tape 4 is guided by tape guide bins 48 and 49 at both left and right ends of the lower half 3, forming a path along the opening 7 on the front surface of the tape cassette.

When using a tape, a protrusion provided on a cassette holder or the like (not shown) of a magnetic recording/reproducing device is inserted through the notches 50 and 51 formed on the end surface of the rotating lid 12 parallel to the bottom wall 9b of the lower half. While pressing one end surface of the sliding member 29, the sliding member 29 is moved backward against the repulsive force of the compression spring 37 to open the notch 8 on the lower surface of the tape cassette, and then the rotating lid is pressed in an appropriate manner. The rotating lid 12 is rotated upward against the repulsive force of the torsion coil spring 23 by a lifting means (not shown) to open the opening 7 on the front surface of the tape cassette, and the notch of the tape loading post of the magnetic recording/reproducing device is opened. Part 8
The tape 4 can be inserted into the tape cassette and pulled out to the front of the tape cassette. At this time, since the closing body 14.15 also rotates in conjunction with the sliding arm 27.28 of the sliding member 29, the reel shaft insertion hole 10.11 is also opened, and the reel shaft of the magnetic recording/reproducing device is inserted into the tape cassette. Inner Nori-
It is also possible to attach it to a Le 5.6.

Conversely, when storing the tape, the rotating lid pushing means is released and the rotating lid 12 is rotated downward by the resistance of the torsion coil spring 23 to close the opening 7 and close the opening 7 so that the projection provided on the cassette holder etc. is released, the sliding member 29 is slid forward by the resistance of the compression spring 37, and the notch 8 is closed. At this time, the closing body 14 is moved in conjunction with the sliding member 29.
, 15 are also rotated to close the reel shaft insertion hole 10.11.

As described in detail, the tape cassette of the present invention provides:
By providing a closing body that covers the reel shaft insertion hole separately from the sliding lid that covers the notch on the bottom surface of the tape cassette, the sliding direction and stroke of the sliding lid and the moving direction and stroke of the closing body can be controlled separately. Therefore, even if the reel shaft insertion hole is relatively large compared to the bottom surface of the tape cassette, such as in a tape cassette for a video tape recorder, the tape and reel can be completely inserted into the cassette housing when the tape is not in use. It can be sealed tightly to prevent the tape from being touched by fingers, dust, etc. (and the end surface of the tape from being scratched due to play in the reel), ensuring that the tape is protected. In addition, since the closure body is a tape cassette configured to interlock with the sliding lid, the structure is simple and easy to assemble, and the number of parts is small (it can be realized at low cost). It can be done, and its practical effects are great.

[Brief explanation of drawings]

Fig. 1 is an exploded perspective view of a tape cassette according to an embodiment of the present invention seen from above, and Figs. 2a and b are internal plan views and bottom views of the tape cassette of the same embodiment excluding the reel when the tape is not used. Figure 3a. FIG. 4 is a bottom view of a conventional tape cassette, and FIG. 5 is a bottom view of a conventional tape cassette for a video tape recorder. 1... Tape cassette, 2... Upper half, 3... Lower half, 4... Tape,
5, 6... Reel, 7... Opening, 8
...Notch, 10.11... Reel shaft insertion hole, 12. Old... Rotating lid, 13...
Sliding lid, 14.15...Closing body, 26...Sliding part with middle step, 27.28...Sliding arm, 38
．． 39... Sliding locking piece, 40, 41 Old... Interlocking guide bin, 44.45... Interlocking guide groove. Name of agent Patent attorney Toshio Nakao (1 person) Figure 1 Figure 2 <a) tl,) Figure 3 (a) (1) -

Claims (1)

[Claims] A tape cassette consists of an upper half and a lower half, and stores a pair of left and right reels wrapped with tape.
An opening is provided on the front surface of the tape cassette, and a notch that communicates with the opening is provided on the bottom surface of the tape cassette. A sliding lid that slides inside the reel shaft, and a closing body that closes a pair of left and right reel shaft insertion holes provided in the bottom wall of the lower half, and the closing body is configured to interlock with the sliding lid. A tape cassette characterized by: