JP3470238B2 - Tape cartridge - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tape cartridge having a front lid, an upper lid and a back lid for opening and closing a tape loading pocket, and more particularly to an improved top lid structure.

[0002]

2. Description of the Related Art As a tape cartridge of this type, the same applicant has previously proposed, for example, one as shown in FIG. 4 (for example, Japanese Patent Application Nos. 5-340189 and 5-340189).
342394). In this case, a tape loading pocket 6 is provided on the front side of the main body case 1, and the pocket 6 covers the front side of the tape 2 led out into the pocket 6 and the back cover that covers the back side of the tape 2. 11 and three lids of an upper lid 10 covering the tape 2 are opened and closed. The upper lid 10 has a front end portion 10a having a front lid 9
Is pivotally connected to the upper end portion 12a of the back lid 11 so as to be rotatable about a pivot axis 22, and the back lid 11 is pivotally connected to a front and rear intermediate portion of the inner surface of the top lid 10 to be pivotable about a pivot axis 29. The upper lid 10 is adapted to open and close in conjunction with the opening and closing operation of the front lid 9.

[0003]

However, in the above-mentioned tape cartridge having three lids, in order to ensure the smooth opening and closing of the back lid 11, each of the front lid 9 and the back lid 11 and the upper lid 1 is provided.
Positional accuracy of the pivot shafts 22 and 29 of the pivotal connection portion with 0 is an important point. Disappear. Deformation of the top lid 10 is one of the factors that influence the positional accuracy of the pivot.
The upper lid 10 is formed in a simple flat shape and is inferior in rigidity, and is easily warped or deformed at the time of molding or by heat or external force. Due to the warp and deformation of the upper lid 10, the pivots 22 and 29 of the pivotally connecting portions between the upper lid 10 and the front lid 9 and the back lid 11, respectively.
I noticed that the position accuracy of was likely to go wrong. Also, the top lid 1
When 0 warps or deforms, a gap is generated between the overlapping surface with the main body case 1 and dust enters from there to adhere to the tape 2, which is also a problem.

An object of the present invention is to provide a tape cartridge having a front lid, an upper lid and a back lid as described above,
By taking measures to reinforce the upper lid, the deformation of the upper lid is prevented, the opening and closing of the back lid is facilitated, and the entry of dust is prevented.

[0005]

As shown in the illustrated example, a tape cartridge on which the present invention is based has tape outlets 4 and 4 on the front left and right sides of a main body case 1 containing a reel 3 on which a tape 2 is wound. , And a tape loading pocket 6 is provided between the tape outlets 4 and 4, respectively. Then, a front lid 9 for covering the front side of the tape 2 drawn out into the pocket 6
Is supported by the main body case 1 so as to open and close around the rotary shaft 14 so as to open and close the front side of the pocket 6. Front lid 9
Upper lid 10 that opens and closes the upper surface of pocket 6 in conjunction with opening and closing
The front end portion 10a of this is attached to the upper end portion 12a of the front lid 9 by the pivot 2
It is pivotally connected so as to be rotatable around 2. The inner lid of the upper lid 10 is opened and closed so that the back lid 11 that covers the back surface of the tape 2 moves in an interlocking manner with the opening and closing of the front lid 9 between the position that covers the back surface of the tape 2 and the open position at the upper rear of the main body case 1. It is pivotally connected to the front-rear intermediate portion so as to be rotatable around a pivot 29.

Further, according to the present invention, a downwardly projecting wall 19 is continuously provided at the rear end of the inner surface of the upper lid 10 in the left-right direction. In this case, on the upper wall surface 34 of the tape outlet 4 of the main body case 1, the protruding wall 19 is formed when the upper lid 10 is closed.
A recessed groove 28 into which is fitted is provided.

[0007]

The protruding wall 19 provided on the inner surface rear end of the upper lid 10 over the entire length in the left-right direction improves the second moment of area of the upper lid 10, increases bending rigidity, and reduces warpage and deformation. Therefore, it is possible to improve the positional accuracy of the pivot shafts 22 and 29 of the pivotal connection between the front lid 9 and the back lid 11 and the upper lid 10, so that when the front lid 9 is pivoted upward around the pivot shaft 14, the upper lid is rotated. 10 is pushed rearward of the upper surface of the pocket 6, and with the opening of the upper lid 10, the rear lid 11 is always smoothly opened and rotated so as to overlap with the lower side of the upper lid 10 behind the upper surface of the pocket 6.

When the upper lid 10 is closed, the protruding wall 19 fits into the concave groove 28 of the main body case 1, so that dust can be prevented from entering the pocket 6 from between the upper lid 10 and the main body case 1.

[0009]

1 to 3 show an embodiment of a tape cartridge according to the present invention. This tape cartridge is for a video, and as shown in FIGS. 1 and 3, its main body case 1 is a plastic upper and lower case 1a.
A pair of left and right reels 3 around which the tape 2 is wound are rotatably arranged. The tape 2 drawn from one reel 3 is guided by the tape guides 5 provided at the front left and right tape outlets 4 of the main body case 1 and wound on the other reel 3. The front center of the main body case 1, that is, the left and right tape outlets 4
A tape loading pocket 6 is provided between the four. The upper and lower surfaces and front surface of the pocket 6 are open, and the left and right side surfaces are the left and right side walls 7 provided on the upper and lower cases 1a and 1b.
7, and the rear surface is closed by the rear wall 8.

The lead-out portion 2a of the tape 2 led out into the pocket 6 is made of a plastic front lid 9 and top lid 10 when not in use.
And a back cover 11 to cover and protect them. Front lid 9
As shown in FIGS. 1 and 3, a main face plate 12 that closes the front faces of the pocket 6 and the tape outlet 4 and a side face plate 13 that is integrally provided from left and right ends of the main face plate 12 toward the rear of the case. Consists of. A rotary shaft 14 is provided on each inner surface of the left and right side plates 13, and the rotary shaft 14 is rotatably fitted into the shaft holes 16 of the left and right side walls 15, 15 of the main body case 1. As a result, the front lid 9 has the left and right tape outlets 4 and 4 and the pocket 6 as shown by the solid line in FIG.
Is openable and closable around the rotary shaft 14 between a position for closing the front surface of the and the upper open position shown by the two-dot chain line in FIG. The front lid 9 is always biased to be closed by a spring member 17 (see FIG. 3) formed of a torsion coil spring fitted to one of the left and right rotating shafts 14.

As shown in FIGS. 1 and 3, the upper lid 10 is formed in the shape of a flat plate that covers the upper surface of the pocket 6 so as to cover above the lead-out portion 2a of the tape 2, and a downward projecting wall 19 is formed at the rear end of this inner surface. It is continuously formed integrally in the left-right direction. Further, the side plates 20 and 20 are provided on both left and right ends of the upper lid 10.
Are integrally connected to the lower side, and slide shafts 21 are projectingly provided on the inner surface sides of the rear ends of the left and right side plates 20, 20, respectively. The upper lid 10 is interlocked with the opening / closing operation of the front lid 9, and as shown by the solid line state in FIG. 1, a closed position for covering the upper surface of the pocket 6 and the stepped upper wall surface 34 above the tape outlet 4, and FIG. As shown by the two-dot chain line state, it can be opened and closed freely to the open position where the pocket 6 is retracted to the rear of the upper surface. Therefore, as shown in FIGS. 2 and 3, the upper lid 10 is provided with a pair of left and right bifurcated arms 23, 23 having pivots 22 on both left and right ends of a front end portion 10a thereof, and the front lid 9 is interposed between the bifurcated arms 23, 23. The upper end portion 12a is sandwiched, and the pivot shaft 22 is fitted into shaft holes 24 provided on both left and right end surfaces of the upper end portion 12a, so that the pivot shaft 22 is rotatably supported about the pivot shaft 22. Further, as shown in FIG. 1, the slide shaft 21 is provided on each outer surface of the left and right side walls 15, 15 of the main body case 1.
It is slidably engaged with the V-shaped guide groove 25. In the closed state of the upper lid 10, a concave groove 28 into which the protruding wall 19 is fitted is provided on the upper wall surface 34 of the tape outlet 4 in the left-right direction. In this case, a taper 19a is provided on the rear surface of the projecting wall 19 and a taper 28a is provided on the rear inner wall of the concave groove 28 so as not to hinder the opening / closing operation of the upper lid 10.

As shown in FIG. 1, the back cover 11 has a closed position for covering the back side of the tape 2 in the pocket 6 as shown by the solid line in FIG. 1 when the front cover 9 and the upper cover 10 are opened and closed. As shown by the chain double-dashed line state, the pocket 6 is openable and closable to the open position where it overlaps with the lower side of the upper lid 10 in the open state behind the upper surface of the pocket 6. Therefore, as shown in FIG. 1 and FIG. 3, the back cover 11 includes the left and right bifurcated arms 26, 26 provided on the upper end 11 a of the back cover 11 at the front and rear intermediate portions of the inner surface of the top cover 10. While sandwiched, forked arms 26
A pivot shaft 29 provided on 26 is fitted into a shaft hole 30 provided at an end surface of the back cover holding wall 27, so that the pivot shaft 29 is rotatably connected to the upper cover 10. In addition, the leg portions 31 are provided on the left and right of the lower rear surface of the case back 11.
And the slide pin 3 provided on each of the left and right leg portions 31.
2 is slidably engaged with a "J" -shaped guide groove 33 which is vertically recessed in the left and right side walls 7 in the pocket 6.

In use, when the tape cartridge having the above-mentioned structure is loaded in the VTR and the front lid 9 is pivoted upward around the pivot shaft 14, the top lid 10 slides the slide shaft 21 into the guide groove 25.
Thus, the front end portion 10a is pushed rearward while tilting the front end portion 10a obliquely upward from the upper surface of the pocket 6 by being moved and guided rearward of the pocket, and opens and moves rearward from the upper surface of the pocket 6 largely. Along with the opening of the top lid 10, the back lid 11 guides the slide pin 32 upward and backward by the guide groove 33, and is opened and moved so as to approach and overlap the lower side of the top lid 10 behind the upper surface of the pocket 6. To do.

[0014]

As described above, according to the present invention, since the projecting wall 19 is provided at the rear end of the inner surface of the upper lid 10 over the entire length in the left-right direction, the rigidity of the upper lid 10 can be increased and warpage and deformation can be prevented. Therefore, it is possible to improve the positional accuracy of the pivots 22 and 29 of the pivotal connection between the front lid 9 and the back lid 11 and the upper lid 10, so that the back lid 11 can be opened and closed in conjunction with the opening and closing of the front lid 9 and the upper lid 10. Can always be done smoothly. Further, since the concave groove 28 is provided in the upper wall surface 34 of the tape outlet 4 of the main body case 1 and the protruding wall 19 of the upper lid 10 is fitted into the concave groove 28, the upper lid 10 and the upper wall surface 34 of the main body case 1 are This is advantageous because dust can be prevented from entering the pocket 6 from between.

[Brief description of drawings]

1 is a cross-sectional view taken along the line AA in FIG.

FIG. 2 is a perspective view of the entire appearance.

FIG. 3 is an exploded perspective view showing a state in which a front lid, a back lid and an upper lid are separated.

FIG. 4 is a sectional view of a main part of a conventional example.

[Explanation of symbols]

1 body case 2 tapes 3 reel 4 Tape outlet 6 pockets Side wall of 7 pockets 9 Front lid 10 Top lid 11 case back 14 rotation axis 15 Left and right side walls of the case 19 protruding wall 20 Side plate 22 Axis 28 groove 29 Axis

─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Noriaki Masuda, 292 Yoshida-cho, Totsuka-ku, Yokohama-shi, Kanagawa Inside the Video Media Research Laboratory, Hitachi, Ltd. (72) Hidekazu Takeda 292 Yoshida-cho, Totsuka-ku, Yokohama-shi, Kanagawa Video Media Research Laboratory, Hitachi, Ltd. (56) Reference Japanese Unexamined Patent Publication No. 5-342801 (JP, A) Actual development Sho 61-189486 (JP, U) (58) Fields investigated (Int.Cl. ⁷ , DB) Name) G11B 23/087 525

Claims (3)

(57) [Claims] 1. A main body case containing a reel around which a tape is wound is provided with tape outlets on the front left and right sides of the main body case, and a tape loading pocket between the tape outlets. A front lid that covers the front side of the tape led out in the pocket is provided in the main body case with the pocket and the tape.
It is supported so as to open and close about the rotation axis so as to open and close the front side of the outlet , and in conjunction with the opening and closing of the front lid, the upper surface of the pocket and the front of the pocket.
Freely open and close the stepped upper wall above the tape outlet
The upper lid has a cover, and a front end portion of the upper lid is pivotally connected to an upper end portion of the front lid so as to be rotatable about a pivot, and a back lid that covers a back surface side of the tape is the front lid. Rotatably and pivotally connected to the front-rear intermediate portion of the inner surface of the upper lid so as to open and close between a position covering the back side of the tape and an opening position on the upper rear side of the main body case in conjunction with opening and closing in it are tape cartridges, the has a downward protruding wall on the inner surface rear end of the upper cover is provided continuously over the right and left directions, on said wall surface of said tape drawing outlet of the main body case, before
A concave groove is provided in which the projecting wall is fitted when the upper lid is closed.
A tape cartridge characterized by being used . 2. A main body case containing a reel around which a tape is wound is provided with tape outlets on the front left and right sides of the main body case.
But pocket for tape loading between the tape outlets are provided respectively on the main body case, said pocket and said tape pulling
A front lid that opens and closes the front side of the mouth , and is pivotally connected to the front lid via a pivot, and is linked to the opening and closing of the front lid in a step-down shape above the upper surface of the pocket and the tape outlet. Upper wall
A tape cartridge having an upper lid that opens and closes a surface thereof , wherein a downward projecting wall is continuously provided in the rear end of the inner surface of the upper lid in the left-right direction, and the upper portion of the tape outlet of the main body case is provided. On the wall, in front
Provided the previous SL protruding wall writing fits groove in the closed state of the serial top cover
A tape cartridge characterized by being used . 3. A taper on the rear surface of the protruding wall,
A taper is provided on each of the inner walls of the rear side of the
Or the tape cartridge described in 2.