JPS6020212Y2 - tape cassette - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a tape cassette that is most suitable for application to recording and reproducing devices such as video tape recorders and other various information processing devices.

As is well known, a tape cassette for a video tape recorder has an opening on one side thereof, and a cutout on the lower surface communicating with the opening.

Then, by attaching this tape cassette to the video tape recorder main body, the tape loading guide is inserted into the inside of the tape inside the cassette from the notch, and then the tape loading guide is moved from the opening to the outside of the cassette. A tape loading guide pulls the tape out of the cassette and forces it to be loaded onto a predetermined tape running path.

Conventionally, a rotatable lid is provided on the front surface of the opening to prevent the tape from accidentally flying out of the cassette and being damaged. The structure was such that the rotating lid could be rotated to open when attached to the main body.

However, in the past, no consideration was given to preventing dust from entering the inside of the cassette through the notch, so the dust could accidentally enter the inside of the cassette and adhere to the magnetic surface of the tape, preventing recording. Or, there was a defect that easily caused dropouts during playback.

In addition, some conventional devices have been designed to improve the sealing performance of the cassette by providing a lower part in the notch.

However, since this lower cover rotates outward to open the notch, a space for opening the lower cover is created in the tape cassette mounting part of the video tape recorder body. Another problem has arisen in that the space factor of the video tape recorder body becomes worse.

The present invention was devised in order to correct the above-mentioned defects, and the above-mentioned opening and notch can be respectively closed by an upper cover and a sliding cover to improve the sealing performance of the cassette. It is an object of the present invention to provide a tape cassette in which the sliding lid can be opened within the notch, thereby improving the space factor of the device body into which the tape cassette is installed.

An embodiment in which the present invention is applied to a tape cassette for a video tape recorder will be described below with reference to the drawings.

First, FIGS. 1 to 5 show a first embodiment of the present invention, in which a tape cassette 1 consists of a rectangular upper half 2 and a lower half made of synthetic leather and resin, as shown in FIG. 3, and these upper half 2 and lower half 3 are fitted into each other from above and below, and are screwed together with setscrews 4 to 7 as shown in FIG. 2 to form an integrated housing. .

As shown in FIG. 2, a pair of tape reels 8 and 9 are rotatably housed in the tape cassette 1, and a magnetic tape (hereinafter simply referred to as tape) 10 is wound around both tape reels 8 and 9. ing.

Note that both tape reels 8 and 9 are attached to the bottom wall 11 of the lower half 3.
It is placed on top of the reel, and its lower end is fitted into a pair of reel fitting holes 12 and 13 provided in the bottom wall 11 for positioning.

As shown in FIGS. 1 to 4, the front surface of the tape cassette 1 is provided with an opening 14 that spans the entire width of the S' cassette, and the bottom wall 11 has a notch that is continuous with the opening 14. 15 are provided.

The tape 10 is connected to a pair of tape guide pins 17 provided on the lower half 3 at both left and right ends of the opening 14.
18 and passed along the opening 14.

The cross section of the opening 14 is >' as shown in FIGS. 2 and 4.
It is covered with an L-shaped upper lid 20.

This upper cover 20 is integrally molded with a pair of bracket parts 22 having pin holes 21 at both left and right ends thereof, and a pair of fulcrum pins 23 provided at both left and right ends of the lower half 3 are inserted into each pin hole 21. inserted.

The upper lid 20 is rotatable in the vertical direction about both fulcrum pins 23.

Note that this upper cover 20 has both fulcrum pins 2 as shown in FIG.
A torsion spring 24 attached to the opening 14 is biased downward (counterclockwise in FIG. 4) to close the opening 14 at all times.

Further, a slit 25, which will be described later, is provided at the lower edge of the central portion of the upper lid 20.

On the other hand, a U-shaped partition wall 28 is integrally provided on the bottom wall 11 of the lower half 3 along the notch 15, as shown in FIGS. 1 and 3.

The upper end of this partition wall 28 is continuous to the ceiling wall 29 of the upper half as shown in FIGS. 4 and 5, and the partition wall 28 partitions the notch 15 and the inside of the tape cassette 1. There is.

More specifically, the partition wall 28 is provided a little apart from the cutout 15; a U-shaped support surface 30 is formed between the partition wall 28 and the cutout 15.

A pair of stopper portions 31 are provided at both left and right ends of this support surface 30.
are integrally provided, and a pair of left and right guide plate portions 32 are integrally provided in the intermediate portion.

As shown in FIGS. 4 and 5, these guide plate portions 32 each have an arcuate guide surface 33 rising smoothly from the rear edge of the cutout portion 15 toward the partition wall 25, which will be described later. The sliding plate 34 is configured to be guided while sliding on both of these guide surfaces 33.

As shown in FIG. 3, the notch 15 is covered with a sliding plate 34 whose both ends are supported by the support surface 30.

This sliding plate 34 is provided with a pair of stopped parts 35 at both left and right ends of its front edge, and the sliding plate 34 is connected to the opening 1.
It is configured so that it does not slide toward the 4th side.

Further, the rear end of the sliding plate 34 is located at the lower end of both guide surfaces 33 as shown in FIG. 4, and the rear end of the sliding plate 34 can slide upward along both guide surfaces 33. It is like that.

A pair of left and right guide plates 36 attached to the ceiling wall 29 of the upper half 2 are positioned above the sliding plate 34, and are configured so that the sliding plate 34 can slide rearward and upward without wobbling. ing.

On the bottom wall 11 between the tape reels 8 and 9, a bar spring (or a plate spring made of synthetic resin film, etc.) 37 is provided along the bottom wall 11, as shown in FIG.

This rod spring 37 has one end thereof projected toward the notch 15 from a vertical hole 38 provided in the center of the partition wall 28, and is placed on the rear edge of the sliding plate 34 as shown in FIG. There is.

Further, the other end of the rod spring 37 is inserted into and fixed to a fastening portion 39 integrally formed on the bottom wall 11.

That is, the sliding lid 34 is configured such that its rear edge is constantly pressed downward by one end of the bar spring 37 to close the notch 15.

The tape cassette 1 is constructed as described above, and normally the opening 14 is closed by the upper lid 20 and the notch 15 is closed by the sliding plate 34, as shown in FIG.

Therefore, the tape cassette 1 has a high sealing performance, and dust and the like do not adhere to the tape 10 bussed along the opening 14.

On the other hand, when the tape cassette 1 is attached to the video tape recorder main body, the upper lid 20 and the sliding plate 34 are opened as shown in FIG. 5, and the tape 10 can be pulled out of the tape cassette 1 through the opening 14.

That is, for example, when the tape cassette 1 is inserted into a cassette holder or the like of a video tape recorder main body, the protrusion 42 provided on the cassette holder or the like moves from the slit 25 to the fourth
It is inserted relatively in the direction of arrow a in the figure.

Then, the projection 42 presses the front edge of the sliding plate 34, and the sliding plate 34 is guided by both guide surfaces 33 and slides rearward and upward against the pressing force of the bar spring 37.

As a result, the notch 15 is opened, and the tape loading guide can be inserted into the notch 15.

Next, when the tape cassette 1 is pushed downward and set in the cassette device position within the video tape recorder main body, the top lid 20 is pushed up by another projection (not shown) provided on the video tape recorder main body.

As a result, the upper cover 20 is rotated clockwise in FIG. 5 against both torsion springs 24, and the opening 14 is opened.

At the same time, a tape loading guide is inserted through the notch 15, and the tape 10 passed along the opening 14 can be pulled out of the tape cassette 1.

Next, a second embodiment of the present invention will be explained based on FIGS. 6 and 7.

In this embodiment, the sliding plate 34 closes the notch 15 in an inclined state, and therefore the mounting condition of the sliding lid 34 is slightly different from that of the first embodiment.

That is, the supporting surfaces 30 formed between the partition wall 28 and the notch 15 are provided only at both left and right ends as shown in FIG. 6, and a sliding cover is provided on both supporting surfaces 30 as shown in FIG. Stopped portions 35 formed at both left and right end portions of the lower end portion of the stopper portion 34 are slidably supported on the support surface 30 thereof.

Both branch stopper portions 35 of the sliding plate 34 are in contact with both stopper portions 31, and the cutout portion 15 is substantially closed with the upper end edge in contact with the substantially central portion of the partition wall 28.

In addition, a spring receiving arm portion 45 is provided at the center of the upper edge of the sliding lid 34.
are provided at right angles, and this spring receiving arm 45 is connected to the vertical hole 3.
It is inserted into 8.

The tip of the spring receiving arm 45 protrudes to the back side of the partition wall 28,
A U-shaped spring receiving portion 46 that is wider than the vertical hole 38 is provided there.

The tip of the bar spring 37 is placed on this spring receiving portion 46.

Therefore, in this case, when the lower end of the sliding plate 3-4 is pressed by the protrusion 42, the sliding plate 34 moves backward along both supporting surfaces 30 and the partition wall 28 against the pressing force of the bar spring 37. , the notch 15 is opened.

Note that even if the sliding plate 34 is slid until it becomes vertical as shown by the dashed line in FIG.
Since the pressing force acts as a moment by the spring receiving arm 45, the sliding plate 34 can be smoothly closed.

As described above, the present invention includes an opening formed on one side of a tape cassette containing a tape reel, a notch formed on the lower surface of the tape cassette in a continuous manner with the opening, and a cutout that covers the opening. In the tape cassette having a rotatable upper lid, a sliding lid is provided which is disposed on the inner lower side of the tape in the notch to substantially open and close the notch, and the sliding lid is slid rearward and upward. Since the tape cassette is characterized in that the notch portion is opened by moving the tape cassette, the opening portion and the notch portion are respectively closed by the upper cover and the sliding cover, and the sealing performance of the cassette is improved. is extremely high.

Moreover, in particular, since the sliding lid is configured to be able to slide within the notch to open the notch, it is possible to reduce the difference in the downward movement, for example, by opening the cover to the bottom of the tape cassette. There is no need to provide any additional space for opening the lid, and the space factor within the device body into which the tape cassette is mounted can be improved, making it suitable for downsizing of recording and reproducing devices.

[Brief explanation of drawings]

The drawings show an embodiment in which the present invention is applied to a tape cassette for a video tape recorder, and FIGS. 1 to 5 show the first embodiment, and FIG. 1 is an exploded perspective view;
Figure 2 is a partially cutaway plan view, Figure 3 is a perspective view of the main parts showing the mounting structure of the sliding lid, Figures 4 and 5 are sectional views of the main parts explaining the lid opening operation, FIG. 6 is an exploded perspective view of the tape cassette according to the second embodiment, and FIG. 7 is a sectional view of the main parts for explaining the lid opening operation. Also, in the symbols used in the same figure, 8, 9...
・Tape reel, 14... Opening, 15-...
...Notch, 20...Top lid, 34...
・Sliding lid.

Claims (1)

[Scope of utility model registration request] An opening formed on one side of a tape cassette containing a built-in tape reel, a notch formed on a lower surface of the tape cassette continuous with the opening, and a rotatable top lid that covers the opening. In the tape cassette, a sliding lid is provided on the inner lower side of the tape in the notch to substantially open and close the notch, and by sliding the sliding lid rearward and upward, the notch can be closed. A tape cassette characterized in that it is configured to open.