JPS6057587A - Tape cassette - Google Patents

Abstract

PURPOSE:To easily check visually the wound quantity of a tape in a tape cassette, by arranging a brake releasing plate between a pair of tape reels and installing a light passing hole, through which the wound quantity of tape can be checked, between the pair of reels. CONSTITUTION:An angular hole 150 is installed to a location between a pair of tape reels 28 and 30 of a flat sliding plate 84 and it is arranged that the lower end part 151 of the angular hole 150 almost coincides with a line connecting the rotating centers of the tape reels 28 and 30 when brake levers 118 and 120 are at locations where brake levers 118 and 120 respectively contact the tape reels 28 and 30. Moreover, it is also arranged that the upper end surface 152 of the hole 150 almost coincides with the line connecting the rotating centers of the tape reels 28 and 30 when the flat sliding plate 84 exists at the position above mentioned. When this condition is viewed through the seeing window 18 of a cassette half 22, the wound quantity of a tape can be seen easily because the light of a light source arranged to the back of a tape cassette can pass through the seeing window 19 of a lower cassette half 24, angular hole 150 of the flat sliding plate 84, and the seeing window 18 of the upper cassette half 22.

Description

[Detailed Description of the Invention] P'θ Commercially Useful Molecules) The present invention ll': 1. In recent years, cassette-type video tape recorders for home use have been used in magnetic tape devices such as audio tape recorders and video tape recorders. It was rapidly gaining traction. The tape cassettes used in these video tape recorders house a pair of tape reels wound with magnetic tape, juxtaposed in the same plane. and,
An opening is provided on the side surface of the tape so that the tape can be drawn out. Further, when the tape is stored in the cassette, the tape reel gradually rotates due to vibrations, etc., and the brake means brakes the rotation of the tape reel in the same way as the tape itself. Since the brake means brakes each reel individually, (a pair is required, but the release plate for releasing the brake of the brake means is placed between a pair of reels, and the structure is better placed in the cylinder. '' - Since it can be done at a low price, ordinary tape cassettes use such a brake means and brake release plate. However, if a brake release plate is placed between a pair of reels, the tape reels can be stored as shown in Figure 1. It is necessary to provide two see-through holes 3 on both sides of the tape cassette 4 to see the volume 2 of the tape cassette 4.
Not only does the production cost increase, but the device that illuminates the tape cassette 4 from the back side to make it easier to see the tape volume 2 has the problem of having to provide two light sources.

OBJECTS OF THE INVENTION The present invention provides a tape cassette that solves the problems of such conventional tape cassettes, in which a brake release plate is arranged between a pair of reels, and a tape cassette is provided between a pair of reels. We offer four tape cassettes that are translucent and have holes that allow you to see the volume.

Composition of the Invention The tape cassette of the present invention includes a pair of parallel main plates, a pair of magnetic tapes wound thereon arranged in parallel between the main plates, and a brake means for braking the rotation of the tape reel. and a release actuation plate that is located between the pair of tape reels and that releases the braking force of the brake means by moving in a direction perpendicular to a line connecting the rotation centers of the tape reels. Each of the pair of parallel main plates and the release actuating plate is configured to have transparent holes that overlap with each other between the pair of tape reels, so that the transparent holes in the main plate on the back side The light from the light source placed on the back side of the tape cassette can be seen through the light transmitting hole in the main plate on the front side, making it easy to adjust the tape winding amount within 7 degrees. It is something that becomes.

DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

FIG. 2 is a 41-plane external view of the tape cassette 2o according to the present invention. It's a trench. Figure 3 is a side view of its exterior. Second
As is clear from FIGS. 3 and 3, the tape-h set 20 has a flat casing with a structure that can be divided into upper and lower parts in the 1.7-dimensional direction, and the first cassette half 2
2 and a second cassette half 24. Inside the tape cassette 2o, a pair of tape reels 28 and 30 each having a starting end or a terminal end of a magnetic tape 26 fixed thereon and around which the tape 26 is wound are stored side by side on the same plane. A wall surface is formed on the ball side surface in the thickness direction of the flat tape cassette 20 to protect the tape 26 from the outside world, but the - side surface 32 is an opening with no wall surface, and from this side surface 32 the tape 26 is formed. can be brought out to the outside.

Normally, when the tape 20 is not used, that is, the tape 26
In order to protect the tape 26 from which the tape 26 is not pulled out, the opening in the side surface 32 is covered by a rotating plate 34.

Figure 4 shows the first cassette half 22 (tape reel) 2
0 is a view from the inner side when removed from the main body.

As shown in the figure, the rotating plate 34 has a "U" shape, a protrusion 1443e provided near both ends of the "U" shape.
, 38 to the first cassette half 22 (7) both (
By inserting it into the hole provided on the 1i11 surface, a rotatable pivot point is formed. A helical spring 40 is applied to the protrusion 36 and biases the rotating plate 34 in a direction that always closes the rotating plate 34, that is, in a direction in which the rotating plate 34 is perpendicular to the paper plane in FIG.

Incidentally, a see-through window 18, 19 is formed approximately in the center of the upper and lower blade set halves 22, 24 so as to allow one to see the amount of tape wound.

Figure 6 is a sectional view taken along the X-Y line in Figure 2, showing the tape cassette 2.
o This shows the inside. The tape cassette 20 according to this embodiment is a so-called flangeless reel, in which the pair of tape reels 28 and 30 do not have flanges.

In other words, the pair of tape reels 28 and 30 only wind one amount of tape 26 around the outer periphery of the winding drums 42 and 44. A pair of tape reels 28.30 has 1 winding on both ☆11,1 in the axial direction.
Step portion 46.48.60.52 smaller in diameter than 1.42°44
have. These step portions 46, 4B, 50, 52 are the first
of the cassette half 22 and the second cassette half 24 i) The four parts 54°56.58.
60, the positions of the tape reels 28, 30 in the 1F direction inside the tape sleeve 20 are loosely regulated. Stepped portions 46, 48
, 50.52 and the recessed portion 54 of the cassette half.
6.58, between 60 and 415, ζ-1nS'i
- Lubricating thrust bearings such as seats 62, 64,
66 and 68 are present to ensure smooth rotation of the tape reel 28 and 30. In fact, two rectangular sheets 70, 72 with lubricating properties, such as 4-inch 0-strong lubricant sheets, are placed on both end surfaces of the winding drums 42 and 44, so that they are in slight contact with each other, as if sandwiching the winding drums. The tape 26 serves as a means for regulating 11.1j when the end portion is distorted due to irregular winding of one yarn wound on the tape reel or falling of two rows.

The position and shape of the sheets 70 and 72 can be seen in more detail in FIG. Figure 6 is the tape reel in Figure 1) 20
FIG. 2 is a diagram with the first cassette half 22 removed. A pair of tape reels 28 and 3o are connected to each other via guide pins 4°76.78.80 which are installed on the second cassette half 24 by simultaneous molding.
′i′j tsu are matching.

Fig. irl is a plan view of the second cassette half 24 in the ζ state with the pair of tape reels 2'8, 30 and the sheet 7Q removed by 1° in Fig. 6. 1, in which there is a notch 82 in a part of the flat surface of the cassette half 24;
This large portion 82 is connected to the opening on one side 32 of the tape cassette 20, and as shown in FIG. This is a notch provided so that it can be pulled out externally by a drawer means (not shown). Arrow B-G on the inside of the flat plane
This is a flat sliding plate 84 designed to be able to slide in any direction. This plane J'i'i moving plate 84 serves to cover or open the notch 82 provided in the second cassette half 24 by sliding in the direction of arrow B-C. 7 shows a state in which the notch 82 is covered, and FIG. 8 shows a state in which the notch 82 is covered.
2 is shown open.

＼11th sliding plate e, 41d - No. 20 cassette plate
-) If the guide projection 86° 88 is provided in a convex shape on the flat surface of 24, it is guided in one motion.

Dimensions [7] The sliding plate 84 is perpendicular to the sliding direction,
The first one shown in Figure 4 is used to guide the user to prevent them from getting cold.
Three protrusions 92, 94, and 96 integrally formed on the flat surface of the cassette (-) 22 are used.

That is, the first cassette half 22 and the second cassette...
When the tape cassette 20 is formed by combining the tape cassette 20 with the tape cassette 24, the three protrusions 92, 94, and 96 face the flat sliding plate 84 from the vertical direction with a slight guide gap, and prevent the rise during sliding. It guides while preventing. A leaf spring 98 in the shape of a "..." is integrally fixed to one end of the flat sliding plate 84, and when the leaf spring 98 comes into contact with the second cassette half wall surface 10 degrees, arrow B direction, i.e. notch 8
It is always energized in the direction that covers 2, and the pin 7
6.78 serves as a stopper for sliding of the plane sliding plate 84 in the B direction. FIG. 8 shows a state in which the moving plate 84 is pressed against the leaf spring 98 to open the large end portion 82 by an appropriate pressing means 102.

The plane sliding plate 84 is connected to the other -”':!lt, striking notch 82
(As shown in FIGS. 9 and 10, the L-shaped wall surface 10 is bent at a substantially right angle inward of the tape cassette 20.
It has 4. This L-shaped wall surface 104 is shown in FIGS.
As shown in the figure, when the flat sliding plate 84 slides in the direction of arrow B in FIG. The back of the tape 26 is touched by hand from outside the tape 26.

It plays the role of protecting against dust and dirt. As shown in FIG. 9, the above-mentioned rotating plate 34 protects the front surface of the tape 26.
It is narrowed by the rotating plate 34 and is protected from the back image.

FIG. 10 CI - Contrary to FIG. 9, this is a state diagram in which the tape 26 is pulled out from the tape cassette 7) 20.

That is, the planar sliding plate 84 is pressed in the direction of the arrow C corner by an appropriate suppressing means 102 to open the notch 82, and the rotating plate 341d is pressed in the direction of the arrow C corner by an appropriate suppressing means 102. Rotate 2, open part 1j and 32 of the tape cassette 1
I am in a state of

Here, as shown in FIGS. 4, 9, and 10, the pressing means 1 of the plane sliding plate 84
It should be added that a notch 106 is provided so that the sliding plate 84 can be brought into contact with the sliding plate 84.

In the moving plate 84 and the second cassette half 241't4, the notch r<(6 on the 182 side (near the 111 side is shown in FIG. 9 and FIG. 1o) A felt-like 7-t 108 is affixed to the surface of the tape 7 to prevent dust stuck to the moving plate 84 from getting caught inside the tape case. 1 has been fulfilled.

Next, one series of plane sliding plates 84 is formed by m of the above-mentioned notch 82.
It not only protects the back side of the tape 26 and the tape 26, but also controls the on-off status of the brake, which monitors the rotation of the tape reel 28 and 30 of one lamp.

The actual example will be explained using Fig. 7 and Fig. 8(f) 1.
That is, the plane sliding plate 84 is made of sheet metal or
By manufacturing with a mold or the like, one light spring 110, 112 is integrated with one moving plate 84 on the plane 1. Second cassette...] 24 has a protrusion 1113 formed by molding.
Brake levers 118, 120 are fitted with pins 114, 116, and are normally attached to a weak leaf spring 12 attached to the flat surface of the second cassette half 24.
2,124 and bulges as shown in Figure 8, jj312
6 , 128 . This brake lever 11s, 12 okh tape reel 28, 30 starts rotating in the direction 11, buy tape reel 28, 3
The tape reels 28, 3 are pressed against the stepped portions 46, 50 of 0.
The rotation of 0 can be suppressed and the rotation of 1 (is done. From this, the 7th
As shown in the figure, when the flat 4M moving plate 84 slides in the direction of arrow B under the force of the leaf spring 98 and is in the position shown in FIG.
A series of resin springs 110, 112 abut one end of the brake levers 118, 120 and apply rotational force to the brake levers 11a, 120, thus pushing the steps 46, 60 of the tape reel like a bow. Brake lever 118,1
20 presses and suppresses the rotation of tape reel 28°30+l-
,do. At this time, the steps 46, 48, 50, 62 of the tape reel 28, 30 are connected to the recess 5 of the tape cassette 20.
4,56,58. .

Brake lever 118 by the gap that exists between 60 and 60.
．． 120, it moves in the direction of applying tension to the tape 2θ between the pair of tape reels 28 and 30, and also exerts the effect of reducing slack in the tape 26. .

FIG. 8 shows the situation when the flat sliding plate 84 slides in the direction of arrow C. At this time, the engagement between the leaf springs 110° 112 and the brake levers 118, 120 is 1Ii (li"1
．． Therefore, the brake lever 118° 120
(The tape reel 28.
The tape reel 28.30 rotates in the direction of releasing the suppression and moving away from it, and the rotation of the tape reel 28.30 is 7".

A square hole 15Q is provided in a portion of the -1Ii surface sliding plate 84 located between the two tape reels 28°3o,
The position shown in FIG. 7, that is, the brake lever 118,
120 is in the position where it contacts the tape reel 28.3Q, the lower end 151 of the square hole 150 touches both tape reels 28,
When the moving plate 84 is in the position shown in FIG. 8, the upper end surface 152 of the tape reel 28. 3
The lines connecting the centers of rotation of 0 are made to almost coincide.

(When this state is viewed through the see-through window 18 of the L-half 22, it looks like (1) and (b) in FIG. 11.

(Tape reel and tape are omitted.) Figure 11 (
In the state of ia), the upper half of the transparent window 18 is the transparent window 19 of the lower cassette half 24. Plane Fi! i Square hole 15 of moving plate 84
o, the light source placed on the back side of the tape case 20 through the transparent window 18 of the upper settop 22 is the flat sliding plate 8.
If 4 is made of stainless steel or white resin, the anti-Q = ) when external light enters is effective, and the amount of tape to be wound becomes easier. A popular video tape recorder with a light source on the back side of the tape cassette 20 is suitable for various cases.In the case of Fig. 11(b), the transparent part is also reversed. Since it is Irutake, I will explain 1: Ministry 113.

In addition, although it was not carried out in the case of this Ricoh M11, groove cutting such as cutting, rolling, sub-sein processing, knurling, etc. on the stepped portions 46 and 50 of the tape reels 28 and 30 was carried out. , 120, and the teeth are engaged by pressing the brake levers 118 and 120. It is possible to further enhance the braking effect. , leaf spring 11
0 and 112 are not brought into contact with the brake levers 118 and 120, but the tips of the screws 110 and 112 are engaged with the gear cutouts provided on the steps of the tape reels 28 and 30, and the tape reels 28 , 30 across the tape 26
1. Rotate the tape reel 28.30 in the direction in which the Me force is applied to suppress the rotation of the tape reel 28.30. Note that the two 7-tooth 70.72 optical bits are shown in FIG. 4.

The first cassette half 22 shown in FIG. Convex protrusion 5 molded and provided at the same time as second cassette half 24
1 μm 30, 132, 134, 136° 138.140
and the guide convex i1i of the plane sliding plate! It should be noted that it is positioned and placed at 86°88-1-.

As an embodiment of the present invention, a tape cassette having a flange on the tape reel and using a flangeless reel has been described.
It is obvious that the present invention can also be applied to a flange chair with a single flange (tape reel using a tape reel). As mentioned above, the flat sliding plate 84 used in the embodiment has an L-shaped wall surface 104 on one end surface to protect the tape 26, but the flat sliding plate 104 can be used even without the L-shaped wall surface 104. covers the notch 82 and thus covers the opening of the tape cassette 20 together with the rotary plate 34, which clearly serves the purpose of protecting the tape.

Effects of the Invention As is clear from the above explanation, the tape cassette of the present invention has 1. Although this is a tape cassette that applies a brake to the tape reel when using J+ and releases the brake when attached to the device, the light from the light source placed on the flat surface of the tape cassette passes through the hole provided in the center of the tape cassette L-. Therefore, the operator can easily see 1 tape 1 volume II≠. Furthermore, the transparent hole formed in the release actuation plate is a square hole, and at a position where the release actuation plate releases the braking force of the brake means, one end of the square hole is approximately connected to a line connecting the pair of tape reels. Since they match, you can see at a glance whether the tape reel brake is applied or not when viewed from the outside of the Deep Tsunocenote. Furthermore, the transparent window of the tape cassette has a structure that allows light to pass through the transparent window and reflects light from the remaining part, so a device with a light source placed on the cut surface of the tape cassette and external light can be used to expose the tape. No matter which device is used to see the amount of tape wrapped, it has the effect that the amount of tape wrapped can be easily checked visually.

4.1 Explanation of the inside of the cylinder on one side Figure 1 (4) Exterior plan view of a conventional tape cassette, Figure 2 is an exterior N' side view of a tape cassette according to an embodiment of the present invention, and Figure 3 is an illustration of the present invention. Fruit of the invention %j l'71 rudder:] Appearance of tape cassette n11] Side view, No. 41'm (・'
:1. In the tape cassette according to an embodiment of the present invention, the first (inside plan view of vise set half, sectional view of FIG.
゛1 showing the state where the first case note = 7 is removed.
; Figures 7 and 8 are internal plan views of the second cassette half of the tape cassette shown in Figure 2;
10 and 10 are side sectional views of the main parts of the tape cassette according to the embodiment of the present invention, and FIG. 11 (2L) and (b)fl
-1, is a state diagram of main parts in FIGS. 7 and 8.

18 - Transparent window, 2o - Tape cassette, 22-
・First cassette half, 24---Tp 2 cassette half, 26-Magnetic tape, 28° 30 Tape reel pe 32... -Tape cassette side opening, 34...
・Rotating plate, 82 -- Notch, 84 ゞ17 Sliding plate, 9
2.94.96 Projection Js-186,8El - Guide projection, 104 - L-shaped wall surface, 108 Felt-like sheet,
110, 112- leaf spring, 118; 120 - gray lever, 15Q square hole.

Name of the representative Patent attorney Toshi Nakao (Male)
1 Figure 2 Figure 3 2θ Figure 4 34 Figure 5 Figure 6 727 Figure 8

Claims (2)

[Claims] (1) A pair of parallel main plates, a tape reel wound with a pair of magnetic tape arranged in parallel between the main plates, a brake means for braking the rotation of the tape reel, and a brake means for braking the rotation of the tape reel. A release actuation plate is provided between the pair of parallel main plates and the release actuation plate that releases the braking force of the brake means by moving in a direction perpendicular to a line connecting the rotation centers of the tape reel. On each of the plates, the above 1
A tape cassette characterized in that overlapping transparent holes are provided between a pair of tape reels. (2) The transparent hole formed in the release actuation plate is a square hole, and at the position where the release actuation plate releases the braking force of the brake means, one end of the square hole is connected to a line connecting the pair of tape reels. A tape cassette according to claim (1), characterized in that the tape cassette is made to substantially coincide with the following.