JPS6087481A - Cassette - Google Patents

Abstract

PURPOSE:To obtain a cassette, whose both faces can be recorded, with a cover equipped with a lock by providing a lock release structure of a magnetic recording/reproducing device side only on one side close to the cassette main body side. CONSTITUTION:A pair of lock plates 9 on right/left sides are pressed on the inner wall of the cassette main body 1 by pressing force which is set according to depth of recessed parts 9a, 9a', and lock shafts 9c, 9c' which are formed in one body with the lock plate 9 are projected from the outer surface of the cassette main body 1 and enter a mating groove 3a which is provided to a cover 3. When the cassette cover 3 is pushed upward, since the lock shaft 9c abuts on a side wall 3b of the mating groove 3a which is provided to the cover 3, the movement of the cover 3 is hindered. When the cover 3 is pushed downward, abutting of the lock shaft 9 on the side wall 3b of the mating groove 3a equally obstructs the movement of the cover.

Description

[Detailed description of the invention] Industrial applications The present invention relates to improvements in cassettes, such as tape cassettes.

Conventional structure and its problems - In recent years, magnetic recording using tape cassettes has tended to have higher performance and higher density, and it is necessary to prevent the tape from being exposed to the outside air or from being touched by fingers and leaving fingerprints. The need has arisen. Therefore, it is conceivable to put a lid on the front opening of the cassette, and this has already been done for video cassettes and the like. If such a device is to be applied to an audio cassette, it is desired to have a simpler structure and be able to implement it at a lower cost.

For example, a video cassette with a lid that has a locking mechanism and can be used on both sides has been proposed, but when the unlocking member is pressed on both sides of the cassette at the same time, the lock comes off.
The cassette lid is configured to be able to move both up and down. For this reason, it is necessary to incorporate a lock release mechanism on both sides of the cassette in the magnetic recording/reproducing device, which poses a serious problem in miniaturizing the device and reducing costs.

OBJECTS OF THE INVENTION The present invention solves the above-mentioned conventional problems, and provides a cassette with a lid that has a locking mechanism and has an extremely simple structure with few restrictions on magnetic recording and reproducing devices. The purpose is

Composition of the Invention The present invention comprises a cassette body, a U-shaped lid body for opening and closing an opening of the cassette body, and a pair of locking mechanisms for preventing the opening and closing operations of the lid body. is a cassette in which the operation of preventing the vertical opening and closing of the lid body is configured to correspond to each lock mechanism, and by providing only one lock release mechanism on the magnetic recording and reproducing device side near the side of the cassette body, it can be used on both sides. This makes it possible to realize a cassette with a lid that can be locked.

DESCRIPTION OF THE EMBODIMENTS FIG. 1 is a perspective view showing the opened and closed states of a cassette in an embodiment of the present invention, with (,) showing the closed state and (b) showing the opened state. Figure 2(b) is a plan perspective view, (
-) shows a left side view, and (C) shows a right side view. In FIGS. 1 and 2, 1 is the cassette body, 2 is the opening on the front of the cassette, 3 is the cassette lid, 4 is a pivot shaft provided on the side of the cassette lid 3, and 5 is a cassette lid pivot shaft. A fitting hole for the shaft 4 is formed on the side surface of the cassette body 1. 7 has one end in pressure contact with the cassette lid rotation support shaft 4, and the other end is supported by a spring support block 12, and a spring held by the spring support block 12 always urges the cassette lid 3 backward.

Reference numeral 9 denotes a locking plate, the wide part 9d of which is sandwiched between the upper and lower cassette halves, and the side wall of the cassette body and the holding rib 10.
The Institute of Technology is held between. 9a.

g a/ is a recess provided in the lock plate 9; 9a of the lock plate 9;
The depth is set so that the front part is pressed against the inner wall of the cassette body with a set pressure. 9b.

9b' is a push button that is integrally formed with the lock plate 9 and protrudes from the outer surface of the cassette body 1; 9c and 9c' are lock shafts that are integrally formed with the lock plate 9; 3a and 3a'.

The operation of the cassette of this embodiment configured as above will be explained. The pair of left and right lock plates 9 have recesses 9a and 9a'.
Lock shafts 9c and 9c', which are pressed against the inner wall surface of the cassette body 1 with a pressing force set by the depth of It has entered into the fitted fitting groove 3a. Now when trying to push the cassette lid body 3 upward, the lock shaft 9
c comes into contact with the wall surface 3b of the fitting groove 3a provided in the lid 3, so movement of the lid 3 is prevented. Similarly, when the lid 3 is pushed down, the lock shaft 9c comes into contact with the wall surface 3b' of the fitting groove 3a, thereby preventing the lid from moving. The case shown in FIG. 2 corresponds to the case where the lock is working, and at this time the lid does not move.

Next, in FIG. 2 Φ), when the push button 9b of the lock plate 9 located on the right side of the cassette is pressed to the outer surface of the cassette body, the lock shaft 9C formed integrally therewith will enter inside the outer peripheral wall surface of the cassette body 1. The contact between the lock shaft 9c and the wall surface 3b in the fitting groove 3a of the lid body 3 is released. At this time, within the fitting groove 3a/ formed on the left side surface of the lid body 3, the wall surface 3b' and the wall surface 3c' are formed at approximately right angles, and there is nothing in this range that comes into contact with the lock shaft 9c'. From the above, the lid 3 can be rotated because there is nothing to prevent it from moving upward. However, even in this case, downward rotation of the lid 3 is prevented by the lock shaft 9c' and the wall surface 3b'. Similarly, left lock push button 9b'
When pressed, only the downward rotation of the lid body 3 is possible.

As described above, according to this embodiment, in a cassette with a lid that can be rotated up and down, a pair of locking mechanisms are provided, and each locking mechanism has an upper and lower rotation prevention function, so that the following can be achieved. Various effects can be obtained. Even in a magnetic recording/reproducing device that uses both sides of a cassette body with a lid, the lid of the cassette body 1 can be opened and closed in one direction within the device.
For example, it is only necessary to provide a lock release mechanism in the magnetic recording/reproducing device only at the position where the lock push button 9b is pressed when the cassette main body 1 is installed, and the cassette lid is always opened upward, which allows the cassette to be used on both sides. The configuration of the recording/reproducing device becomes extremely simple, which is effective in reducing the size, reliability, and cost of the device. Furthermore, a locking mechanism is provided on the side surface of the cassette body, and the lid body 3 can be unlocked by either one of the pair of push buttons 9b and sb'. The lock release mechanism of the magnetic recording/reproducing device inserted with the front side may also be a simple wall-like mechanism and can be constructed very easily. Furthermore, in the configuration of the magnetic recording and reproducing device, there are role constraints due to the addition of a locking function to the tape drive mechanism such as the head, capstan, and pinch roller, and the recording mechanism, which are located near the front opening of the cassette body. It is possible to maintain basic recording and playback performance without giving any problems. Also, a lock plate 9, push buttons 9b, 9b', which are integrally formed with a locking mechanism,
By constructing the lock shafts 9G, 90' and the fitting grooves 3a, 3a' of the lid body 3, it is possible to form a highly reliable locking mechanism with an extremely small number of parts.

In addition, the lock plate 9 is formed of a thin plate-like member, and the push button 9b
, 9b' has been realized by forming a recess in the lock plate 9, which ensures full long-time recording and playback characteristics without impairing the maximum tape winding diameter inside the cassette body, and reduces the number of parts. This makes it possible to realize a cassette with an extremely practical and reliable locking mechanism.

Effects of the Invention The present invention comprises: - a cassette body having an opening on the side, a U-shaped lid that opens and closes the opening in both vertical directions, and a pair of locking mechanisms that prevent the opening and closing of the U-shaped lid; The pair of locking mechanisms has a structure in which the operation of preventing the lid from opening and closing up and down corresponds to each individual locking mechanism, so that it has no directionality in inserting the cassette and has an extremely simple unlocking mechanism. It is possible to realize a magnetic recording/reproducing device with a magnetic recording/reproducing device with high reliability, and to construct a locking mechanism with low additional cost.

[Brief explanation of drawings]

FIG. 1 shows one embodiment of the present invention, in which (a) is a perspective view of the cassette lid in the closed state, (b) is a perspective view of the cassette lid in the open state, and FIG.
Figure (a) is a left side view, figure (b) is a plan perspective view, figure (
C) is a right side view. 1... Cassette body, 2... Opening,
3... Mountain cover body, 3a, 3a'... Fitting groove, 9.
...Lock plate, 9b...Push button, 9c...
...Lock axis.

Claims (4)

[Claims] (1) - Consisting of a cassette body with an opening on the side, a U-shaped lid that opens and closes the opening both up and down, and a pair of lock mechanisms that prevent the U-shaped lid from opening and closing. . A cassette, wherein the pair of locking mechanisms correspond to the respective locking mechanisms for preventing the upper and lower opening and closing of the lid. (2) A patented cassette characterized in that the locking mechanism has a configuration having a push button, a lock shaft, and a fitting groove provided in the lid body into which the lock shaft fits. (3) The cassette according to claim 1 or 2, characterized in that the push button, the lock shaft, and the urging means for returning the push button are integrated. (4) The cassette according to claim 1, item 2 or 3, characterized in that a push button is provided on the side surface of the cassette main body.