JPH0814960B2 - Tape cartridge - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tape cartridge provided with an erroneous erasure prevention unit including a slide type erasure prevention valve for identifying whether or not recording is possible. It is an improvement of the built-in form of the erasure prevention valve.

[Conventional technology]

As this kind of erroneous erasure prevention means, there are a valve removal method for breaking off the erroneous erasure prevention valve provided on the rear wall of the main body case and a switching method for opening and closing the erroneous erasure prevention hole with a slidable erasure prevention valve. . The switching erroneous erasure prevention means has an advantage that it can be reused any number of times by switching the erroneous erasure prevention valve. Therefore, the valve removal system is being replaced by a slide switching system.

There, an erroneous erasure prevention hole is recessed into the inside of the case in the rear wall of the main body case where the upper and lower cases are butted, and the erroneous erasure prevention valve is provided in the recordable position and the unrecordable position. It is incorporated so that it can be slid horizontally and horizontally.

[Problems to be Solved by the Invention]

However, the conventional switching type erroneous erasure prevention valve cannot come out of the erroneous erasure prevention hole only when the upper case is brought into contact with the lower case.

Therefore, in the temporarily assembled state where the lower case is assembled with the erroneous erasure prevention valve, the erroneous erasure prevention valve falls down from the erroneous erasure prevention hole of the lower case during the process of covering the lower case with the upper case. The actual situation is the bottleneck to automatic assembly.

SUMMARY OF THE INVENTION An object of the present invention is to provide a tape cartridge that can reliably tentatively assemble the erroneous erasure prevention valve in the lower case and is advantageous for automation of assembly.

Another object of the present invention is to obtain a tape cartridge in which the slide operation of the erroneous erasure prevention valve is stabilized.

[Means for solving the problem]

The present invention is, for example, as shown in FIG.
・ The erroneous erasure prevention hole 11 is provided in the rear wall 10 of the lower case 1b of the body case 1 formed by abutting 1b, and the erroneous erasure prevention valve 12 is provided on the left and right sides of the unrecordable position and the recordable position. It is premised on a tape cartridge that can be slid horizontally.

After that, insert the inner back wall into the accidental erasure prevention hole 11 of the lower case 1b.
13 is located at a position more inward than the rear wall 10a of the upper case 1a, and the abutting surface of the upper and lower cases 1a and 1b (P
・ Set so that the height is at least L). On the other hand, the erroneous erasure prevention valve 12 has an assembly structure that is slidable along the inner back wall 13 of the lower case 1b. Therefore, the erasure prevention valve 12
Has a main wall 15 on which the detector member P on the recorder side acts,
A locking arm 16 is attached to the main wall 15. The locking arm 16 is the inner back wall
The upper end of 13 is engaged with the outer side of the case to prevent it from coming off. Specifically, the locking arm 16 has a hook-shaped locking arm 16 projecting from the upper end of the main wall 15 toward the inside of the case, and the tip 16a is bent downward. Back wall 13
It is made slidable along the inner back wall 13 across the upper end of the.

[Action]

The erasure prevention valve 12 is provided on the lower case 1b with the erasure prevention hole 11
It is first assembled by dropping it from above and engaging the locking arm 16 with the inner back wall 13. With this, the erroneous erasure prevention valve 12 can obtain a stable pre-assembled state in which the erroneous erasure prevention hole 12 does not fall out from the erroneous erasure prevention hole 11.

Since the upper end of the inner back wall 13 is set to a height higher than the abutting surface (P / L) of the upper and lower cases 1a and 1b, the inner back wall 13 is higher than that when it is lower than the abutting surface (P / L). Further, the locking arm 16 can be straddled in the first insertion state, and the drop stroke of the erroneous erasure prevention valve 12 from above can be reduced. Further, the erasure prevention valve 12 is provided on the inner wall 13 thereof.
The locking arm 16 can be deeply straddled and the sliding performance is improved.

〔The invention's effect〕

The erroneous erasure prevention valve 12 of the present invention is configured such that the locking arm 16 is engaged with the upper end of the inner back wall 13 of the lower case 1b so as to prevent it from coming off the case and slides along the inner back wall 13. And Therefore, the erroneous erasure prevention valve 12 can be easily and stably temporarily assembled into the narrow erroneous erasure prevention hole 11 of the lower case 1b by dropping it from above, and is subject to vibration and the like on the assembly line until the upper case 1a is covered. However, the accidental erasure prevention valve 12 does not fall from the accidental erasure prevention hole 11. As a result, the process of assembling the erroneous erasure prevention valve 12 on the lower case 1b and the process of covering the upper case 1a can be efficiently performed by a consistent work, and automatic mechanization of the assembly can be effectively achieved.

Especially, the height of the upper end of the inner back wall 13 that supports the erroneous erasure prevention piece 12 is set to be equal to or higher than the abutting surface (P / L) of the upper and lower cases 1a and 1b. It has an advantage that it can be performed easily and surely and the stability of the slide operation can be improved.

〔Example〕

The figure illustrates a VHS type tape cartridge,
The main body case 1 comprises a plastic upper case 1a and a lower case 1b. These upper case 1a and lower case 1b
Are formed in a state where the body case 1 is divided into upper and lower halves, and are abutted against each other. Reference numerals (P and L) indicate the abutting surfaces of the upper and lower cases 1a and 1b.

In FIG. 2, a feeding tape reel 2 and a take-up tape reel 3 are arranged on the left and right sides of the main body case 1. The tape 4 drawn out from the feeding tape reel 2 is taken up by the take-up tape reel 3 via guide members 5 provided on the left and right of the front end of the case. A tape loading pocket (not shown) is provided between both guide members 5 and 5, and the front outer side of the tape 4 crossing the pocket is covered by a front lid 7 attached to the main body case 1 when not in use. It is being appreciated.

In FIG. 1, the rear wall 10 of the main body case 1 is an upper and lower case.
Rear walls 10a and 10b of 1a and 1b are butted against each other, and a slide switching type erroneous erasure prevention means 9 is provided at a corner portion on the left side of the rear wall 10 of the body case 1.

The erroneous erasure prevention means 9 includes an erroneous erasure prevention hole 11 recessed in the rear wall 10b of the lower case 1b. ) It is installed so that it can slide laterally across the possible positions.

In FIG. 3, an erroneous erasure prevention hole 11 is provided on the left end side of the rear wall 10b of the lower case 1b so as to be recessed into the inside of the case. It is formed in a horizontally long quadrangular shape when viewed from the front, including the setting position of and extending to the left of this setting position.

An inner back wall 13 is formed in the inner side of the erroneous erasure prevention hole 11 so as to be separated from the tape reel storage area integrally with the rear wall 10b. As shown in FIG. 1, the inner back wall 13 is located at a position more inward than the rear wall 10a of the upper case 1a located above it, and the abutting surface (PL) of the upper and lower cases 1a and 1b. When the upper case 1a is put on the lower case 1b, the lower end of the rear wall 10a on the upper case 1a side and the upper end of the inner back wall 13 face each other in an inner and outer staggered manner. A void 14 is formed between them.

In FIGS. 1 and 3, the erroneous erasure prevention valve 12 is a plastic molded product, and has a vertical main wall 15 that prevents the lever-type detection member P on the recorder side from entering the erroneous erasure prevention hole 11. A hook-shaped engaging arm 16 having a tip 16a bent downward is integrally provided on the upper end side of the main wall 15 toward the inside of the case. The main wall 15 is a quadrangle having substantially the same size as the erroneous erasure prevention valve of the break-away type in the conventional tape cartridge.

The erroneous erasure prevention valve 12 is the tape reel 2 on the lower case 1b.
-Incorporated with required parts such as 3 and guide member 5. At this time, the erasure prevention valve 12 is dropped into the erasure prevention hole 11 from above. With this, when the locking arm 16 is straddled over the upper end of the inner back wall 13 so that the tip 16a thereof is located on the inner surface side of the inner back wall 13, the inner surface side of the main wall 15 contacts the outer surface side of the inner back wall 13. Hit,
The outer surface of the main wall 15 is temporarily assembled so as to be flush with the outer surface of the rear wall 10b.

The erroneous erasure prevention valve 12 is formed by the locking arm 16 and the inner surface of the main wall 15 on the inner back wall.
Since the upper end of 13 is sandwiched slidably inside and outside,
Even if the erroneous erasure prevention valve 12 is lifted by an upward impact by an amount corresponding to the downward extension of the locking arm 16, the erroneous erasure prevention valve 12 does not come off from the lower case 1b and does not fall to the rear side of the case.

Next, when the upper case 1a is put on the lower case 1b, the erroneous erasure prevention valve 12 is provided in the erroneous erasure prevention hole 11 as shown in FIG. 1 and the lower end of the rear wall 10a of the upper case 1a and the lower case 1b. Back wall 13
The root portion of the locking arm 16 is accommodated in the space 14 formed between the rear wall 10a and the upper end of the rear wall 10a.
It is possible to obtain a housed state in which the lower end of is positioned directly above the main wall 15 with a slight gap. Therefore, the erroneous erasure prevention valve 12 can be lightened in its sliding operation, and can be in a preferable closed state in which the erasure prevention hole 11 does not rise.

Further, since the outer surface of the main wall 15 of the erroneous erasure prevention valve 12 is flush with the outer surfaces of the rear walls 10a and 10b of the upper and lower cases 1a and 1b in the erroneous erasure prevention hole 11, even when it is loaded in the recorder. The detection member P on the recorder side can be smoothly slid on the outer surface thereof to ensure a reliable detection operation of whether or not recording is possible.

The erroneous erasure prevention valve 12 is formed by sliding the locking arm 16 along the inner back wall 13 in the lateral direction to the erasure prevention hole 11
It is possible to switch between the recordable position on the right end side and the unrecordable position on the left end side.

At this time, since the locking arm 16 of the erroneous erasure prevention valve 12 straddles the upper end of the inner back wall 13, the erroneous erasure prevention valve 12 is prevented from dropping toward the opening outer surface of the erroneous erasure prevention hole 11. However, when the straddle depth is small, the erroneous erasure prevention valve 12 may be inclined such that the lower end of the main wall 15 thereof protrudes from the bottom of the erroneous erasure prevention hole 11. In order to surely prevent the tilt of the erroneous erasure prevention valve 12 and maintain its vertical posture more reliably, a recessed groove 18 is provided on the bottom 17 of the erroneous erasure prevention hole 11 in the left-right direction in the figure to prevent erroneous erasure. A convex portion 19 provided on the inner side of the lower end of the main wall 15 of the valve 12 is slidably fitted in the concave groove 18.

[Another embodiment]

The inner back wall 13 is preferably set higher than the abutting surface (P · L). Therefore, in Fig. 4, the inner back wall 13
The upper end of the upper case 1a almost reaches the center of the rear wall 10a of the upper case 1a.

According to this, the upper end of the inner back wall 13 is the abutting surface (P.
Since it protrudes further upward of L), the erroneous erasure prevention valve 12 may be dropped by first hooking the locking arm 16 on the upper end of the inner back wall 13 and then dropping it. At this time, the drop stroke of an assembling jig or the like that holds the erasure prevention valve 12 can be small. The locking arm 16 can be deeply and surely straddled on the inner back wall 13 and can be slid stably.

The locking arm 16 of the erroneous erasure prevention valve 12 has a tip 16a.
Is formed further downward than in the above-mentioned embodiment to increase the straddle depth to the inner back wall 13, so that the convex portion 19 of the main wall 15 is formed.
It is possible to omit the engaging structure between the groove 18 and the bottom groove 18.

[Brief description of drawings]

1 to 3 show an embodiment of a tape cartridge according to the present invention. FIG. 1 is a vertical sectional side view of a main part, FIG. 2 is an internal plan view, and FIG. 3 is an exploded perspective view. Is. FIG. 4 is a vertical cross-sectional side view of essential parts showing another embodiment of the present invention in correspondence with FIG. 1 …… Main body case, 1a …… Upper case, 1b …… Lower case, 10 …… Main body case rear wall, 10a …… Upper case rear wall, 10b …… Lower case rear wall, 11 …… Incorrect deletion Preventing hole, 12 ... Erase prevention valve, 13 ... Inner wall, 15 ... Main wall, 16 ... Locking arm, P ... Detection member, P / L ... Butt face.

Claims (2)

[Claims] 1. A rear wall (10b) of a lower case (1b) of a main body case (1) formed by abutting upper and lower cases (1a, 1b),
The erroneous erasure prevention hole (11) is recessed inside the case, and the erasure prevention hole (11) is provided with the erasure prevention valve (12) laterally across the recordable and unrecordable positions. In the tape cartridge that is slidably mounted, the inner back wall (13) of the erasure prevention hole (11) of the lower case (1b)
Is provided more inwardly than the rear wall (10a) of the upper case (1a), and the erroneous erasure prevention valve (12) is a main wall (on which the detector member (P) on the recorder side acts. 15) and a locking arm (16) attached to the main wall (15), and the locking arm (16) of the erroneous erasure prevention valve (12) is the inner back wall (1).
It is slidable along the inner back wall (13) by engaging with the upper end of 3) in the outward direction of the case, and the upper end of the inner back wall (13) is the upper and lower cases (1a ・ 1b). ) The height of the abutting surface (P / L) or higher is set, and the tape cartridge is characterized. 2. The locking arm (16) of the erroneous erasure prevention valve (12) is provided so as to project from the upper end of the main wall (15) toward the inside of the case and to have the tip (16).
A) is formed in a hook shape that bends downward, and the locking arm (16) is slidable along the inner back wall (13) across the upper end of the inner back wall (13). 1. The tape cartridge according to 1.