JPH05217328A - Large and small tape cassettes - Google Patents

Abstract

PURPOSE:To load a small tape cassette into a cassette loading device shared with a large tape cassette by holding the small tape cassette which is different in shape and thickness with a simple holder making the height of a magnetic tape equal. CONSTITUTION:The magnetic tape 2, a front lid 5 for covering an opening part 11 and a slider 6 are interlocked, and the front lid 5 is opened and closed by moving the slider 6. Then, grooves 5c and 5d corresponding to pins 8c and 8d for moving the slider 6 of the small tape cassette are formed on the front lid 5 of the large tape cassette and a recessed part is formed on the bottom part of the cassette main body, so that the two large and small tape cassettes can be loaded into the same cassette loading device.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a large and small tape cassette used in a magnetic recording / reproducing apparatus such as a video tape recorder for recording / reproducing by winding a magnetic tape around a cylinder at a predetermined angle. ..

[0002]

2. Description of the Related Art A conventional tape cassette used in a rotary head type recording / reproducing apparatus has an opening for inserting a tape pulling member for pulling out a magnetic tape, and is disclosed in Japanese Patent Laid-Open No. 1-320693. A tape cassette having such a structure has been generally used. The configuration will be described below with reference to FIGS. 12 to 15.

As shown in the figure, a tape cassette 31 used in a recording / reproducing apparatus accommodates a supply reel 33 and a take-up reel 34 around which a magnetic tape 32 is wound, and a magnetic tape 32.
Is formed from the tape cassette 31 to form an opening 35 for inserting a tape drawing member for winding. The magnetic tape 32 is covered with a front lid 36 and a rear lid 37 so that it cannot be easily touched. When mounted on the recording / reproducing apparatus, the lid releasing member 38 is moved from the position shown in FIG. 14 to the position shown in FIG. 15 by the lid releasing pin 39a provided upright on the cassette holder (not shown). And the front lid 36
The portion that is engaged with the lid stopper 36a formed on the is released. Next, the front lid 36 and the rear lid 37 are rotated upward by the lid release pins 39b attached to the cassette holder to expose the magnetic tape 32, and the magnetic tape 32 is mounted on the drum on which the rotary head is mounted by the tape pull-out member. Is withdrawn.

Further, in the case of a recording / reproducing apparatus in which conventional tape cassettes of two sizes, large and small, are prepared, Japanese Patent Publication No.
As shown in Japanese Patent Publication No. 37692, when a small tape cassette is used, it is common to use an adapter in which the tape tension position is the same as that of the large tape cassette in the outer shape of the large tape cassette. Hereinafter, regarding the configuration, FIG.
And FIG. 16b.

As shown in the figure, in the small tape cassette 40, a magnetic tape 42 is stretched by a roller 40c, 40d and 40e between a supply reel 43 and a take-up reel 44 around which the magnetic tape 42 is wound. It is mounted on an adapter 41 having the size of a large tape cassette. At this time, the openings 40a and 40b of the small tape cassette
Mounted on the adapter 41 by inserting the prepared pull-out rollers 45 and 46 into the adapter 41.
5 and 46 move to the roller position of the large tape cassette as shown in FIG. 16B, and the magnetic tape 42 draws out between the supply and take-up reels around which the magnetic tape 42 is wound.
5 and 46 and rollers 40f and 40g of the small tape cassette 40. As a result, the small tape cassette 40 has the same outer shape and tape tension as the large tape cassette, and the adapter can be loaded into the magnetic tape device.

[0006]

In such a conventional tape cassette 31, the lid releasing member 39a is rotated until the front lid 36 and the rear lid 37 are fully opened to the recordable / reproducible state.
Since it is necessary to use two kinds of members, the lid release pin 39b and the mechanism, the mechanism is complicated and expensive. Further, the adapter 41 loads the small tape cassette 40 and then the magnetic tape 42 wound around the small tape cassette to the large tape. A complicated mechanism was required because it was necessary to pull out to the tape tension position of the cassette with the pull-out rollers 45 and 46.

The present invention solves the above problems, and provides two types of tape cassettes, large and small, which can be commonly used to expose a magnetic tape stretched on the front surface by a protrusion formed on a cassette holder when mounted on a recording / reproducing apparatus. The purpose is to do.

[0008]

In order to achieve this object, a tape cassette of the present invention comprises an upper half and a lower half, and accommodates a supply reel and a take-up reel wound with a magnetic tape, and the magnetic tape. A cassette body having a front opening, a slider that is constantly urged in the front direction to cover the top and bottom surfaces of the cassette body opening, and slides back and forth on the cassette body; And a front lid that is pivotally supported by the cassette body and is rotated and slid by the slider, and an opening / closing means is inserted from the front surface of the cassette body to open and close the front lid simultaneously with the movement of the slider. It is possible, and the supply and take-up reels have no flange and are thin and have a small outer shape, and a large tape having a flange and a large outer shape. A set of two large and small tape cassettes having different outer shapes and thicknesses, in which a groove is provided on the front lid and a recess is provided on the bottom so that an opening / closing means for opening and closing the lid of the small tape cassette can be inserted into the large tape cassette. It was formed.

[0009]

According to the present invention, the projections for the small tape cassette and the large tape cassette formed in the loading device provided in the recording / reproducing apparatus are provided on the front lid from the front of the cassette body of the two large and small tape cassettes. The slider enters into the notch of the slider through the formed groove, and the slider that abuts at the notch moves rearward, and the front lid also rotates and slides in conjunction with it to move rearward and stretch to the front. Exposed magnetic tape.

[0010]

EXAMPLES Examples of the present invention will be described below with reference to FIGS.
Will be described with reference to. In this embodiment, since the opening / closing operation of the lid is symmetrical, the operation will be described only for one side.

As shown in the figure, a supply reel 3 and a take-up reel 4 wound with a magnetic tape 2 are housed in a tape cassette 1 composed of an upper half 1a and a lower half 1b, and the magnetic tape 2 is formed on the tape cassette 1. Fixed post 1c,
It is stretched over 1d and surrounds the opening 11. A locking portion 1e is formed on a part of the outside of the tape cassette 1.

The front lid 5 covers the magnetic tape 2 stretched by the fixed posts 1c and 1d of the tape cassette 1 on the front surface, and the first elongated holes 52 formed in the ribs 51 at both ends form the side surface of the tape cassette 1. The shaft 101 formed on the side wall 61 of the slider 6 is engaged with the second elongated holes 53 formed on the ribs 51 at both ends. A pair of grooves 57 is formed at the lower end of the front lid 5.

The slider 6 is pressed by a spring (not shown) toward the front lid 5 at the front, is located in the opening 11 of the tape cassette 1, covers the opening 11 with the top surface and the bottom surface, and The magnetic tape 2 whose front surface is covered with the front lid 5 by being pressed against the magnetic tape 5 is sealed. Further, a cutout portion 65 is formed on the bottom surface immediately after the groove 57 formed in the front lid 5, and the shaft 62 described above is formed on the side wall 61 connected to the side surface of the tape cassette 1 to form the upper half 1a and the lower half. It is slidably mounted on 1b.

The lock member 7 is axially supported by the lower half 1b, the slider 6 and the shaft 7a, and is urged in the counterclockwise direction by an elastic member (not shown) so that the convex portion 7b of the lock member 7 is formed on the cassette body 1. The slider 6 is locked by engaging with the locked portion 1e.

The supply reel 3 and the take-up reel 4 of the small tape cassette have no flange, and the supply reel 3 and the take-up reel 4 of the large tape cassette have a flange 3.
There are a, 3b and 4a, 4b, and the height of the magnetic tape 2 wound around each tape cassette and the distance between the reel axes are as shown in FIG.

Next, the opening / closing operation of the lid of the tape cassette having the above-mentioned structure will be described. The opening / closing operation of the lid is the same for both the large tape cassette and the small tape cassette, and therefore the small tape cassette will be described as an example.

The tape cassette 1 is mounted on a cassette holder (not shown) of the recording / reproducing apparatus, and pins 8 forming the tape cassette 1 on the cassette holder are formed on the slider 6 as shown in FIGS. It is moved to a position where it abuts the notched portion 65. After that, the lock member 7 moves against the counterclockwise rotational biasing force of the elastic member due to the pin 8 abutting on the cam 7c, and the convex portion engaged with the locking portion of the cassette body 1. The state of FIG. 6 is obtained by releasing 7b. Thereafter, when the tape cassette 1 further moves, the pin 8 formed on the cassette holder relatively moves backward, and the slider 6 slides backward against the urging force of the spring, resulting in the state of FIG. 7.

The mutual movement of the front lid 5 and the slider 6 due to the rearward sliding of the slider 6 will be described.

As the tape cassette 1 is moved by the inserting operation, the pin 8 relatively moves to move the slider 6 in the direction of arrow A in FIG. 2 and the shaft 6 formed on the side wall 61 of the slider 6.
2 is moved in the horizontal direction to press the wall portion of the second elongated hole 53 formed in the rib 51 of the front lid 5. This allows the front lid 5
Rotates about the shafts 101 formed on both side surfaces of the tape cassette 1 engaged with the first elongated holes 52 formed in the ribs 51 at both ends in the direction of arrow B in FIG. The magnetic tape 2 is rotated and exposed, and the state shown in FIG. 3 is obtained.

After that, the tape cassette 1 is further moved, the pin 8 is relatively moved, and the slider 6 is slid, so that the shaft 62 formed on the side wall 61 of the slider 6 causes the front lid 5 to move. Second long hole 53 formed in rib 51
The front lid 5 is pressed by being locked by the concave portion 53a of the front lid 5, and the front lid 5 is guided by the first elongated holes 52 formed in the ribs 51 thereof engaged with the shafts 101 on both side surfaces of the tape cassette 1. 6 moves in the direction of the supply reel 3 and the take-up reel 4 integrally with 6, and becomes the state of FIG.

In the state of FIG. 4, the top surface and the bottom surface of the opening 11 of the tape cassette 1 are open. Even if the front lid 5 is rotated approximately 90 degrees above the opening 11 of the tape cassette 1, there is a sufficient gap for inserting the tape pull-out member.
Further, the tape cassette 1 is held in the state shown in FIG. 4 against the reaction force of the spring by a locking member or the like provided on the cassette holder.

In this state, if the magnetic tapes 2 are mounted to the operating position of the recording / reproducing apparatus with the heights of the respective magnetic tapes 2 aligned with each other by the supporting members specially prepared for the large tape cassette and the small tape cassette, the tape cassettes can be mounted. 1 opening 1
The tape pull-out member inserted in 1 pulls out the magnetic tape 2 from the supply reel 3 or the take-up reel 4 and moves it to a position in the vicinity of the drum equipped with the rotary head to wind the magnetic tape 2 around the drum equipped with the rotary head. Therefore, by rotating the drum equipped with the rotary head, rotating the supply reel 3 and the take-up reel 4 and running the magnetic tape 2, recording or reproduction on the magnetic tape 2 becomes possible.

Next, at the time of discharging from the recording / reproducing apparatus, the magnetic tape 2 wound around a drum having a rotary head mounted thereon is wound around the supply reel 3 or the take-up reel 4 together with the movement of the tape pull-out member, and the tape cassette 1 is opened. Part 1
The tape pull-out member moves to 1, and the tape pull-out member is pulled out from the opening 11 of the tape cassette 1 by the upward movement of the cassette holder, and the tape cassette 1 moves to the closing operation. The closing operation is an operation subsequent to the raising operation of the cassette holder, and the tape cassette 1 by the locking member of the cassette holder.
This is done by releasing the lock of the.

As described above, the slider 6 is biased forward with the tape cassette 1 via the spring, and the slider 6 is in contact with the pin 8 of the cassette holder. Is moved backwards. On the contrary, the slider 6 slides forward of the tape cassette 1 by the reaction force of the spring.

The slider 6 presses the front lid 5 against the wall of the second long hole 53 formed in the rib 51 of the front lid 5 by the shaft 62 formed on the side wall 61 of the slider 6, and the front lid 5 is taped. The ribs 5 of the front lid 5 are attached to the shafts 101 formed on both sides of the cassette 1.
1 is engaged with and guided by the first elongated hole 52 formed in No. 1 and moves forward together with the slider 6, and shafts 101 formed on both side surfaces of the tape cassette 1 are formed on the ribs 51 of the front lid 5. The one end of the formed second elongated hole 53 is brought into contact, and the state shown in FIG. 3 is obtained.

Further, when the slider 6 slides in the front direction of the tape cassette 1, the shaft 62 formed on the side wall 61 of the slider 6 forms the wall of the first elongated hole 52 formed in the rib 51 of the front lid 5. And the front lid 5 is engaged with the second long hole 53 formed in the rib 51 of the front lid 5.
2, the magnetic tape 2 is sealed with the slider 6 and the front lid 5, and the top and bottom surfaces of the opening 11 of the tape cassette 1 are covered with the slider 6. It becomes the state of.

After that, when the tape cassette 1 is taken out from the cassette holder, the pin 8 is separated from the cam 7c of the lock member 7, and the convex portion 7b of the lock member 7 is rotated by the urging force of the elastic member, and the cassette main body. The slider 6 is locked by engaging with the locking portion 1e formed in 1.

The tape cassette 1 is used in the embodiment.
Although the operation of the front lid 5 and the slider 6 has been described by moving the pin 8 with respect to the pin 8, the same operation can be obtained by moving the pin 8 with respect to the tape cassette 1.

Further, although the lock member 7 is provided only on one side in the embodiment, the tape cassette 1 in which the slider 6 is more securely locked can be realized by providing the lock member 7 on both sides as needed.

Magnetic recording / reproduction of these large and small tape cassettes is carried out by one cassette loading device without changing the position of the large and small tape cassettes by aligning the heights of the magnetic tapes 2 and pulling out the magnetic tape. In order to load the apparatus, as shown in FIG. 9, it is necessary to provide two pairs of pins 8 for moving the slider 6 at four height differences h, and a pin 8c for moving the slider of the small tape cassette. , 8d interfere with the outer shape of the large tape cassette.
In order to avoid this, as shown in FIGS. 10 (a) and 10 (b), grooves 5c and 5d are formed on the front lid 5 of the large tape cassette, and the movement range of the pins 8c and 8d is larger than the moving range of the pins 8c and 8d on the bottom of the cassette body. This is possible by providing the concave portion 1g.

In order to load the small tape cassette in the magnetic recording / reproducing apparatus with the same cassette loading device as the large tape cassette, it is necessary to align the heights of the magnetic tapes 2 and the openings 11 of both the large and small tape cassettes. There is.
In order to do so, it is necessary to center the large tape cassette and the small tape cassette in the cassette loading device and hold them while changing the height of the bottom surface, and the structure is complicated and many parts are required. This has the same outer shape as the large tape cassette as shown in FIG.
A holder 12 which is mounted from 2a, which can be positioned, and which can hold and store the slider 6 of the small tape cassette 1 and the front lid 5 can be rotated and slid is used. It can be easily realized by loading the recording / reproducing apparatus.

As described above, according to the tape cassette of the embodiment of the present invention, the locking means of the slider 6 of the tape cassette 1 can be released by one member provided in the cassette holder of the recording / reproducing apparatus, and the slider 6 The front lid 5 that covers the magnetic surface of the magnetic tape 2 is rotated upward by sliding to the rear and further moved rearward, so that the occupied space is small and the opening 11 of the tape cassette 1 into which the tape pulling member is inserted is inserted. The upper space of can be enlarged.

Further, since the slider 6 is pressed and slid by the engagement of the pair of pins and the notch, the movement of the slider 6 is smooth, and the position after sliding is accurately set in the cassette holder together with the tape cassette 1 by the pair of pins. Can be positioned at.

[0034]

As is apparent from the above description, according to the present invention, the slider is unlocked only by inserting the tape cassette into the cassette holder of the recording / reproducing apparatus.
In addition, the magnetic tape stretched on the front surface by moving it backward can be exposed. The unlocking operation and the opening operation of the front lid and the slider can be performed by the protrusions formed on the loading device such as the cassette holder such as the pin provided on the cassette holder, and the required number of parts can be reduced and the cost can be reduced. Can be tied to.

Further, in the past, the lid was opened by pushing down the tape cassette, and it was impossible to bring the cylinder and the tape cassette close to each other because the trail of opening and closing the lid was applied to the cylinder. However, in the present invention, the holder of the tape cassette. Since the lid is already opened upon insertion into the cylinder, the magnetic tape stretched on the front surface can be brought close to the cylinder to the limit.

Further, since the magnetic tape is sealed by the front lid and the slider, the magnetic tape can be protected. When the recording / reproducing state is possible, the slider is slid backward, and the tape pulling member is inserted into the front lid. Since the upper space of the opening is rotated and fully opened, the space occupied outside the cassette body can be reduced even when recording and reproduction are possible, and the magnetic tape is rarely sandwiched between the front lid and the slider when fully closed. A cassette tape can be provided.

[Brief description of drawings]

FIG. 1 is an enlarged perspective view of a main part of a tape cassette according to an exemplary embodiment of the present invention viewed from a bottom side thereof.

FIG. 2 is a side view of essential parts of the tape cassette according to the embodiment of the present invention when the front lid is fully closed.

FIG. 3 is a side view of a main part of the tape cassette according to the embodiment of the present invention, in which the front lid is opened and closed.

FIG. 4 is a side view of a main part of the tape cassette according to the embodiment of the present invention when the front lid is fully opened.

FIG. 5 (a) is a front view of the embodiment of the present invention when the slider is locked (partially cut away); and (b) is a bottom view of the embodiment of the present invention when the slider is locked.

FIG. 6A is a front view of the embodiment of the present invention when the slider lock is released (partially cut away). (B) A bottom view of the embodiment of the present invention when the slider lock is released.

FIG. 7A is a front view of the embodiment of the present invention when the slider is fully opened. FIG. 7B is a bottom view of the embodiment of the present invention when the slider is fully opened.

FIG. 8 is a cross-sectional view of a large and small tape cassette according to the present invention at a reel center.

FIG. 9 is a perspective view showing the relationship between a large and small tape cassette of the present invention and a holder.

10A is a bottom perspective view of the large tape cassette of the present invention (when the front lid is closed); FIG. 10B is a bottom perspective view of the large tape cassette of the present invention (when the front lid is opened).

FIG. 11 is an adapter for a small tape cassette of the present invention.

FIG. 12 is a perspective view of a conventional tape cassette.

FIG. 13 is a side sectional view of a main part of the conventional tape cassette when the lid is released.

FIG. 14 is a side view of a main part of a conventional tape cassette.

FIG. 15 is a side view of a main part when the lid of the conventional tape cassette is released.

FIG. 16A is a plan view showing a conventional small tape cassette and an adapter for the small tape cassette. FIG. 16B is a plan view showing a conventional small tape cassette and the adapter (when the tape is stretched).

[Explanation of symbols]

 1 tape cassette 2 magnetic tape 5 front lid 6 slider 7 locking member

Claims (1)

[Claims] 1. A cassette body, which comprises an upper half and a lower half, accommodates a supply and take-up reel around which a magnetic tape is wound, and has the magnetic tape stretched over a front opening, and always biased in the front direction. A slider that covers the top and bottom of the cassette body opening and slides back and forth on the cassette body, and a slider that covers the magnetic tape on the front side and is pivotally supported by the cassette body and rotated and slid by the slider. The opening and closing means can be inserted from the front surface of the cassette body to open and close the front lid simultaneously with the movement of the slider, and the supply and take-up reels can be made thin without flanges. A small tape cassette with a small outer shape and a large tape cassette with a large outer diameter that has a flange. Te, a groove to allow insertion of the closing means for opening and closing the lid of the small tape cassette to the large tape cassette front lid, large and small tape cassette a recess in the bottom.