JPS62202383A - Tape cassette - Google Patents

Abstract

PURPOSE:To simplify the constitution by exposing a reel shaft loading hole and a tape lead-out insertion pocket when a slide plate is slid to the 1st slide position and closing the lead-out member insertion pocket and the reel shaft insertion hole by the slide plate when the slide plate is slid to the 2nd sliding position to lock the turning of the face cover. CONSTITUTION:When a slider 10 is slid toward the rear face of the cassette, a couple of reel insertion holes 5, 6 and a tape lead-out notch 3a engaging loosely a couple of reel hubs 4a, 4b are exposed. When the slider 10 is slid toward the cassette front face, the reel shaft insertion holes 5, 6 and the tape lead-out notch 3a are closed by the slider 10 and the turning of the front face cover 9 is locked. Thus, an exclusive lock mechanism to lock the turning of the front cover 9 is not required, the constitution is simplified, the assembling is facilitated and the front face cover 9 is not turned unexpectedly at storage.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a tape cassette suitable for use in recording digital signals, such as PCM signals.

[Background technology and important points]

BACKGROUND ART Currently, a PCM recording and reproducing apparatus has been proposed that converts an analog signal such as an acoustic signal into a digital signal, such as a PCM signal, and records (or reproduces) the converted signal on a magnetic tape. Some PCM recording and reproducing apparatuses use a rotating head to achieve a relatively high recording density. In an fcPCM recording/reproducing apparatus using this rotary head, recording or reproduction is performed while the magnetic tube is pulled out of the tape cassette and wound around a rotating ram provided with the rotary head.

By the way, in the tape cassette in which this magnetic tape is loaded, if oil components such as fingerprints or dust get on the magnetic tube, a dropout will occur in the playback signal, so oil components such as fingerprints or dust will not get on the magnetic tape. Therefore, it is necessary to seal the magnetic surface of the magnetic tube as tightly as possible. Also, a space is required for inserting a magnetic tape so that the magnetic tape can be pulled out from the tape cassette during recording or reproduction.

For this reason, at the front of the cassette where the magnetic tape is exposed, a rotatable front cover is installed to cover the front side of the cassette, which is the magnetic side of the magnetic tape, and a guide system is inserted to pull out the magnetic tape. A tape cassette that has a space for recording is considered.

However, in a tape cassette like this.

There is an inconvenience in that a finger or the like touches the magnetic tape through the space for inserting the guide system, causing scratches such as dents and creases on the magnetic tape. Also, although the magnetic side of the magnetic tape is covered with a front cover, there is a slight gap between this front cover and the magnetic side of the magnetic tape, and dust can enter the magnetic surface through this gap. There was an inconvenience when it got stuck.

Therefore, it is conceivable to provide an inner cover inside the front cover, cover the side of the magnetic tape opposite to the magnetic surface with the inner cover, and seal the magnetic tape by the front cover and the inner cover.

In this way, a tape cassette with a front cover and an inner cover is
Although the magnetic tape can be hermetically sealed, the structure is complicated and assembly is difficult.

For tape cassettes with such a rotatable front cover, if the front cover is inadvertently rotated during storage, the magnetic tape will be exposed, and if a finger or the like touches the exposed magnetic tape, dust may adhere to it. Therefore, it is common practice to provide a locking mechanism to prevent the front cover from being accidentally rotated during storage. That is, a lock hole is provided in the arm that pivotally supports the front cover so that it can be rotated around the cassette case, and a lock lever having a claw that engages with this lock hole is provided on the cassette case side. A claw is engaged with the lock hole so that the front cover cannot be rotated, and when in use, the lock lever is pressed to release the engagement between the lock hole and the claw, so that the front cover can be rotated. Make it.

By the way, in order to lock the rotation of the front cover in this way, a dedicated lock lever is required as a separate part, and in tape cassettes that are normally used repeatedly, there is a lock lever that is pressed when the lock is released. - The lock lever does not depend on its own elasticity, but on a return spring or the like, so that it returns to its original position. For this reason, a dedicated lock lever 1 return spring or the like is required as a separate component in order to lock the rotation of the front cover, which makes it difficult to assemble the tape cassette. In addition, the reel hub for winding the magnetic tape in the tape cassette is loosely fitted into the reel shaft insertion hole with a slight gap so that it can rotate smoothly. There is an inconvenience that this dust adheres to the tape.

Furthermore, in order to enable the lock lever to be operated from outside the cassette case, a part of the lock lever must be exposed on the outside surface of the cassette case, and the lock hole provided in the arm of the front cover and the lock lever must be exposed on the outside surface of the cassette case. The bar is visible from the outside,
There is also the disadvantage that the appearance of the tape cassette is impaired.

[Purpose of the invention]

In view of the above, it is an object of the present invention to provide a magnetic tape with a simple structure and easy assembly, which prevents dust from adhering to the magnetic tape and which does not come into contact with fingers, etc., and which has a good appearance.

[Summary of the invention]

The present invention provides a cassette case for storing a pair of reel hubs wrapped with magnetic tape, a rotatable front cover that covers the front opening of the cassette case, and a rotatable front cover that covers one side of the cassette case and both left and right sides of the cassette case. a pair of reel shaft insertion holes and a tape drawer into which a pair of reel hubs are loosely fitted when the sliding plate is slid to a first sliding position; When the member insertion pocket is exposed and the sliding plate is slid to the second sliding position, the reel shaft insertion hole and the tape pull-out member insertion pocket are closed by the sliding plate, and the front cover is rotated. According to the tape cassette of the present invention, the structure is simple and easy to assemble, and the magnetic tape does not attract dust or touch with fingers, and has a good appearance. can be obtained.

〔Example〕

Hereinafter, the present invention will be described with reference to the drawings) <7)
Let us explain the −1dTx example.

In Figures 1 and 2, (1) indicates a cassette case, and this cassette case (1) is composed of a pair of upper half (2) and lower half (3) that are joined together by screws. (2a) is a transparent window provided on the upper surface of the upper half (2).(3m) is a transparent window provided at the bottom of the lower half (3) on the front side of the cassette over a predetermined width. This is a cutout, and an ID system for pulling out the magnetic tape (7) is inserted into this cutout (3a) during use.(4
&) and (4b) are loosely fitted into the pair of +7-rule shaft insertion holes (5) and (6) provided at specified positions on the lower half (3) so that they can rotate smoothly. , and a magnetic tape (
7) is wrapped. (8a) and (8b) are a pair of reel shaft insertion holes (5) (6) of the lower no.-f (3) respectively.
These are a pair of positioning holes provided on the front side of the cassette and on the left and right side walls. (9) is a substantially U-shaped front cover that is rotatably provided on the front side of the cassette of the cassette case (1), and this front cover (9) is located on the front side of the cassette so that the magnetic tape can be 7) is rotated upward from the front side of the cassette to expose the magnetic tape (7) on the front side of the cassette. m is the reel shaft insertion hole (
5) It is a substantially U-shaped slider that faces each other on the bottom surface of the lower half (3) on which (6) is provided and on the left and right side walls of the lower half (3) and slides in the front and back direction.

Here, the upper half (2) and lower half (3) will be further explained. A stepped portion having a height equal to the thickness of the arm portion (9m) of the front cover (9) is provided on the front side of the cassette on the left and right side walls of the upper half (2). Also, as shown in Fig. 3, the sliding range of the slider α1 on the left and right sides of the lower half (3) is inside the left and right side walls of the upper half (2) by the thickness of the slider θ0, respectively. In addition to providing a step, the bottom part of this lower half (3) near the back of the cassette corresponding to the outside of the sliding range of the slider αQ is made thicker by the plate thickness of the slider αO, and the bottom part corresponding to the sliding range of the slider 01 is made thicker. Provide a step between the sections. "α" is an idle groove provided according to the slide range of the slider (11) at the border between the left and right side walls of the upper half (2) and the left and right side walls of the lower half (3),
This guides the sliding movement of the slider α1 through the idle groove α℃.
(2) is a long groove provided with its longitudinal direction aligned with the sliding direction of (2).
c) A return spring fixed to the front side wall of the cassette. As will be described later, the other end of this return spring is locked to a spring locking member of the slider αO, and urges the slider Qtlj toward the front side of the cassette.

Next, the front cover (9) will be explained. This front cover (9
The cassette case (1) is made up of a rectangular plate section that is approximately equal to the front surface of the cassette, and an arm section (9a) that pivotally supports this plate section so that it can rotate relative to the cassette case (1). do. In this case, when the front cover (9) is rotated to a position that covers the front of the cassette, the arms (9m) of the front cover (9) are attached to the front of the cassette on the left and right side walls of the upper half (2). Cover only the step part of the front cover (9).
When the slider αO is in this rotational position, the slider αO is in the arm section (9
a) so that it can be positioned below.

Furthermore, the slider QO will be explained here. A reel shaft insertion hole (5) is provided in the flat plate part opposite to the bottom part of the lower half (3) of the slider αQ when the slider aO is slid on the back side of the cassette.
6) and positioning holes (8m) (8b), respectively, and have reel shaft insertion holes (5') (6 and positioning holes (8m') (8b') of the same shape. α◆ is This is a half-ring-shaped spring locking member provided corresponding to the long groove (2) on the bottom of the lower half (3), and the other end of the return spring (to) is attached to this spring locking member α◆. .This slider (to) is down...-7 (3) as shown in Figure 3.
The cassette cassette case (1) is inserted into the slot αη with its two end sides facing each other and sliding along the slot αη.

The operation of the tape cassette constructed in this way will be explained with reference to FIGS. 5 to 13.

First, during storage, the front surface of the cassette is covered with the front cover (9) as shown in FIGS. 5 to 7, and the slider α1 is
is urged toward the front side of the cassette by the return spring αJ, and the slider α0 is slid toward the front side of the cassette so as to abut against the front cover (9). At this time, the reel shaft insertion hole (5) (6) and positioning hole (8a) (8
b) and reel shaft insertion hole (5') of slider α0 (
6') and the corresponding positioning holes (81') (8b') are brought into a non-corresponding state, and the reel shaft insertion hole (5) (6) and the positioning hole (8m) (8b) are closed by the slider αO. The cutout (3a) of the lower half (3) is closed by the slider αO.

Therefore, if dust enters the cassette case (1) through the reel shaft insertion holes (5) and (6), the magnetic tape (7) can be pulled out, but the notch (which forms the space into which the ID system is inserted)
3a) where dust has adhered to the magnetic chip f(7);
The magnetic tape 7' (7) can be sealed well without fingers or the like touching the magnetic tape (7).

Further, in this case, the side plate portion opposite to the side wall portion of the lower half (3) of the slider αO is located below the arm portion (9a) of the front cover (9), and the upper end surface of the side plate portion of the slider αq and the arm portion ( 9a) are closely opposed to each other, and even if the front cover (9a) attempts to rotate, the arm portion (9a) collides with the side plate portion of the slider αO and is locked so that it cannot rotate. The front cover (9) will not rotate unexpectedly.

Next, during use, the slider αO is once slid toward the back side of the cassette against the biasing force of the return spring 0, as shown in FIGS. 8 to 10. At this time, the reel shaft insertion hole (5) (6) of the lower half (3) and the positioning hole (8m)
(8b) and slider αQ reel shaft insertion hole (5'
) (6') and positioning hole (8m') (8b'
) are in correspondence, and the reel shaft insertion hole (5) (6
) and the positioning hole (8m) (8b) respectively from the recording/reproducing device side, the j91J-roll shaft and positioning bottle can be inserted, and the notch (3) of the lower half (3) is equally closed to the slider αO. Instead, the magnetic chip f (7) is pulled out, but the ID system can be inserted into the notch (3a). Also, in this case, the side plate part of the slider αO moves from below the arm part (91) of the front cover (9), and the side plate part of the slider αO moves from below the arm part (91) of the front cover (9).
9), that is, the rotation of the front cover (9) is unlocked.

Then, as shown in FIGS. 11 to 13, the front cover (9)
is rotated upward from the front of the cassette, the magnetic tape (7) is exposed on the front side of the cassette, and the magnetic tape (7) is pulled forward from the front of the cassette by the guide system inserted into the notch (3). It is made possible to do so.

It should be noted that, as described above, when K is performed from the time of use to the time of storage, an operation opposite to that described above is performed when it is performed from the time of use to the time of storage.

As described above, according to the tape cassette of this example, a pair of reel hubs (4a) (4b) are wound with magnetic tape (7).
); and a rotatable front cover (9) that covers the front opening of the cassette case (1).

A slider αQ provided over the negative side of the cassette case (1) and both left and right sides of the cassette case body (1) and slidable in the front and back direction,
When the slider αO is slid to the back side of the cassette, a pair of reel shaft insertion holes (5) (6) into which a pair of reel hubs (4m) (4b) are loosely fitted and a notch for tape extraction (3m) are exposed. , when the slider αO is slid to the front side of the cassette, the reel shaft insertion hole (5) (6) and the tape draw-out notch (3a) are closed by the slider (to), and the front cover (9) is rotated. Since it is designed to lock the front cover (9), there is no need for a special locking mechanism to lock the rotation of the front cover (9), making the structure simple and easy to assemble. ) and the notch (3a) are respectively closed by the slider αQ, and the rotation of the front cover (9) is locked, preventing the front cover (9) from inadvertently rotating and preventing dust from entering the magnetic chip f (7). The reel shaft and positioning pin can be inserted into the reel shaft insertion hole (5) (6) and the positioning hole (8m) (8b) without any problem during use. can. Furthermore, the lower half (3) is provided with relatively simple cutouts, holes, etc. for detecting tape end and the bottom surface of the lower half (3) due to the relatively simple shape of the slider.
It is possible to cover the left and right side walls of the container, resulting in a good appearance.

It goes without saying that the present invention is not limited to the above-described embodiments, and that various other configurations may be adopted without departing from the gist of the present invention.

〔Effect of the invention〕

According to the tape cassette of the present invention, there is provided a cassette cassette housing a pair of reel hubs wound with magnetic tape, a rotatable front cover that covers the front opening of the cassette cassette, and a front lid that covers the front opening of the cassette cassette. a pair of reel hubs that loosely fit the pair of reel hubs when the sliding plate is slid to a first sliding position; The reel shaft insertion hole and the tape pull-out member insertion pocket are exposed, and when the sliding plate is slid to the second sliding position, the reel shaft insertion hole and the tape pull-out member insertion pocket are closed by the sliding plate. At the same time, since the rotation of the front cover is locked, the structure is simple and easy to assemble, and the magnetic tape is free from dust, fingers, etc., and has a good appearance.

[Brief explanation of drawings]

Fig. 1 is a perspective view showing an embodiment of the tape cassette of the present invention, Fig. 2 is a perspective view showing the state in which the front cover of Fig. 1 has been rotated and the slider has been removed, and Fig. 3 is the top view of Fig. A route map for explaining the half, lower half, and slider, Figure 4 is a perspective view showing an example of the slider in Figure 1, Figure 5 is a perspective view for explaining storage, and Figure 6 is a diagram for explaining the slider in Figure 5. Side view, Figure 7 is the 5th
8 is a perspective view showing the slider in FIG. 5 in a sliding state, FIG. 9 is a side view of FIG. 8, FIG. 10 is a bottom view of FIG. 8, and FIG. 11 is a bottom view of FIG. 12 is a side view of FIG. 11, and FIG. 13 is a bottom view of FIG. 11. (1) is the cassette case, (2) and (3) are the upper and lower halves, respectively, (3a) is the notch, (4m) and (4
b) is a pair of reel hubs, (5) and (6) are a pair of reel shaft insertion holes, (7) is a magnetic tape, (9) is a front cover,
αO is a slider.

Claims (1)

[Claims] A cassette cassette housing a pair of reel hubs wrapped with magnetic tape, a rotatable front cover that covers the front opening of the cassette cassette, and a front lid that covers one side of the cassette cassette and the left and right sides of the cassette cassette. a pair of reel shaft insertion holes and a tape drawer into which the pair of reel hubs are loosely fitted when the sliding plate is slid to a first sliding position; When the member insertion pocket is exposed and the sliding plate is slid to the second sliding position, the reel shaft insertion hole and the tape pull-out member insertion pocket are closed by the sliding plate, and the front cover is closed. A tape cassette characterized by locking the rotation of the tape cassette.