JPH0814959B2 - 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 is formed to have a size slightly larger than the erroneous erasure prevention hole provided on the rear wall of the lower case. It does not come out of the hole.

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 Therefore, an object of the present invention is to obtain a deep cartridge in which an erroneous erasure prevention valve can be surely temporarily assembled in the lower case by effectively utilizing a narrow space, and the assembly can be advantageously automated.

[Means for solving the problem]

As shown in FIG. 1, the present invention has an erroneous erasure prevention hole 11 in a rear wall 10 of a lower case 1b of a main body case 1 formed by abutting upper and lower cases 1a and 1b, and the erroneous erasure prevention hole 11 is erroneously erased. It is premised on a tape cartridge in which the prevention valve 12 is slidably operated in the lateral and lateral directions between the unrecordable position and the recordable position.

After that, insert the inner back wall into the accidental erasure prevention hole 11 of the lower case 1b.
The reference numeral 13 is provided so that it is located more inwardly than the rear wall 10a of the upper case 1a. On the other hand, the erasure prevention valve 12
Is an assembly structure that is slidable along the inner back wall 13 of the lower case 1b. Therefore, the erroneous 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. The locking arm 16 is engaged with the upper end of the inner back wall 13 so as not to come off in the outward direction of the case. 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. The inner wall 13 is slidable across the upper end of the inner wall 13.

Thus, the upper wall of the upper case 1a is subject to the upper wall limit of the erroneous erasure prevention valve 12 being restricted.

[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. As a result, the erroneous erasure prevention valve 12 can obtain a stable temporary assembled state in which it does not fall out from the erroneous erasure prevention hole 11.

Then, when the lower case 1b is covered with the upper case 1a and coupled, the erroneous erasure prevention valve 12 is allowed to slide on the rear wall 10a of the upper case 1a and is prevented from moving upward more than necessary. It will be in the assembled state.

〔The invention's effect〕

In the erroneous erasure prevention valve 12 of the present invention, the locking arm 16 is slidable along the inner back wall 13 by engaging the upper end of the inner back wall 13 of the lower case 1b in the outward direction of the case in a retaining manner. did. 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 lower case 1b of the erasure prevention valve 12
The assembling process and the covering process of the upper case 1a can be efficiently assembled by a consistent work, and automatic mechanization of the assembly can be effectively achieved.

〔Example〕

The figure illustrates a VHS type tape cartridge,
Reference numeral 1 is a main body case. The main body case 1 is formed by butt-joining upper and lower plastic cases 1a and 1b.

A feeding tape reel 2 and a winding tape reel 3 are arranged on the left and right sides of the main body case 1. Feeding tape reel 2
The tape 4 drawn out from is wound on the take-up tape reel 3 via guide rollers 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 rollers 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.

The rear wall 10 of the main body case 1 is the rear wall 10a of the upper and lower cases 1a and 1b.
・ The rear wall 1 of the main body case 1 which is made by butting the 10b together
A slide switching type erroneous erasure prevention means 9 is provided at a corner portion on the left side of 0.

The erroneous erasure prevention means 9 includes an erroneous erasure prevention hole 11 recessed in the rear wall 10b of the lower case 1b, and the erroneous erasure prevention valve 12 is recorded in the erroneous erasure prevention hole 11 as a non-recordable position. ) It is installed so that it can slide laterally across the possible positions.

In FIG. 5 and FIG. 6, the erroneous erasure prevention hole 11 is recessed into the inside of the case on the left end side of the rear wall 10b of the lower case 1b. The erase prevention valve is formed in a horizontally long quadrangular shape when viewed from the front, including the setting position of the erasure prevention valve and extending leftward from the 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 set at a position more inward than the rear wall 10a of the upper case 1a located above it, and the lower case 1b is covered with the upper case 1a. When,
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 a staggered manner, and voids 14 are formed between the two.

In FIGS. 1 and 6, 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.

When assembling the erasure prevention valve 12, first set the lower case.
Installed in 1b together with required parts such as tape reels 2.3 and guide roller 5. At this time, the erasure prevention valve 12 is dropped into the erasure prevention hole 11 from above. Thus, as shown in FIGS. 8 and 9, 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 contacts the outer surface side of the inner back wall 13, and the outer surface of the main wall 15 is temporarily assembled flush with the outer surface of the rear wall 10b.
The erroneous erasure prevention valve 12 includes the locking arm 16 and the inner surface of the main wall 15 and the inner back wall 13
Since the upper end of the lock is slidably held inside and outside, the erroneous erasure prevention valve 12 can be removed from the lower case 1b even if the erroneous erasure prevention valve 12 is lifted by an upward impact due to the downward extension of the locking arm 16. Otherwise, it will 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 (state of solid line in FIG. 3) and the unrecordable position on the left end side (state of phantom line in FIG. 3).

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 fitted in the concave groove 18. In this case, the convex portion of the erasure prevention valve 12
If the locking arm 16 is hung on the inner back wall 13 so as to form a slight gap between the groove 19 and the bottom of the concave groove 18, the slide operation of the erroneous erasure prevention valve 12 can be performed lightly. Become.

Positioning holding means for holding the erroneous erasure prevention valve 12 at each switching position is provided between the inner surface of the rear wall 10a on the upper case 1a side and the erroneous erasure prevention valve 12. As this positioning holding means,
As shown in FIGS. 6 and 8, the elastic arm 20 is integrally formed to extend rightward from the upper left end of the locking arm 16 of the erroneous erasure prevention valve 12. The elastic arm 20 can be elastically deformed in a direction orthogonal to the sliding direction with the base connected to the locking arm 16 at the left end as a fulcrum. A moderation protrusion 21 is provided at the tip of the elastic arm 20.
On the other hand, as shown in FIGS. 4 and 7, a pair of left and right vertical ribs 22 are provided on the inner surface of the rear wall 10a of the upper case 1a so as to project therefrom.
A moderation recess 23 is formed on one side of each rib 22. Then, when the erroneous erasure prevention valve 12 is completely switched to the unrecordable position and the recordable position, the moderation convex portion 21 engages with each moderation concave portion 23 and the lateral side of the erasure prevention valve 12 is free. Regulate movement. The recesses between the left and right vertical ribs 22 may be formed so as to fill the recesses. As shown in the fully assembled state of FIG. 1, the erroneous erasure prevention valve 12 includes an upper end portion of the locking arm 16 and an elastic arm.
20 is housed so as to face the inner surface side of the rear wall 10a of the upper case 1a. Therefore, even after the main assembly, even if the upper end side of the erroneous erasure prevention valve 12 may be inclined outward, the upper end portion of the locking arm 16 and the elastic arm 20 contact the inner surface side of the rear wall 10a, Even in this respect, the accidental erasure prevention valve 12 can be well prevented from coming off from the inner back wall 13 in the case outer direction.

With the erasure prevention valve 12 switched to the recordable position, the right end 15a of the upper end surface of the main wall 15 of the erasure prevention valve 12 is provided at the right end of the inner back wall 13 as shown in FIGS. 3 and 8. An operation groove 25 is formed which abuts on the regulation convex portion 24 and in which a fingertip or the like is inserted. Further, even when the erroneous erasure prevention valve 12 is switched to the non-recordable position as shown by the phantom line in FIG. 3, the left end 15b of the upper end surface of the main wall 15 of the erroneous erasure prevention valve 12 is at the left end of the inner back wall 13. The operation groove 27, which is in contact with the provided regulation projection 26 and into which a fingertip or the like is inserted, is formed therebetween. Thus, even when the outer surface of the main wall 15 of the erroneous erasure prevention valve 12 is flush with the outer surface of the rear wall 10 of the case, the operation grooves 25 and 27 can be hooked with fingertips to prevent the erasure prevention valve.
12 slides can be operated easily.

As shown in FIGS. 1 and 6, a coupling boss 28 is provided so as to project from the left corner of the lower case 1b. This bond boss
28 is a connecting boss 29 projecting downward from the inner surface of the upper case 1a.
And screw the screw 30 from the bottom side of the lower case 1b to the connecting boss.
By screwing into 28/29, the left corners of the upper and lower cases 1a and 1b are integrally connected.

In FIG. 1, since the inner back wall 13 is formed in a narrow portion of the lower case 1b, the wall thickness dimension is naturally restricted and the wall tends to be thin, and the supporting function of the erroneous erasure prevention valve 12 is easily lost. Therefore, even if the inner back wall 13 is thin, the root of the coupling boss 28 is connected to the inner back wall 13 with a connecting portion 31 integrally formed with them so that the inner back wall 13 is not inclined and deformed inwardly of the case. Formed. Then, the erroneous erasure prevention valve is provided above the connection portion 31 between the inner surface side of the inner back wall 13 and the coupling boss 28.
Sliding space that can slide 12 to a non-recordable position
Forming 32.

[Another embodiment]

In the erasure prevention valve 12, the locking arm 16 has a tip 16a thereof.
Is formed to be longer than that in the above-mentioned embodiment to increase the stride depth to the inner back wall 13, so that the engaging structure of the convex portion 19 of the main wall 15 and the concave groove 18 of the bottom can be omitted. it can.

The moderation means of the accidental erasure prevention valve 12 may be performed between the lower end of the rear wall 10a of the upper case 1a and the upper end of the main wall 15 of the accidental erasure prevention valve 12.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 to FIG. 9 show an embodiment of a tape cartridge according to the present invention, and FIG. 1 is a vertical sectional side view of a main part in a state where an erroneous erasure prevention valve is incorporated, 2 is a perspective view of the entire appearance, FIG. 3 is a front view of the erasure prevention valve as seen from the outside of the case, FIG. 4 is a bottom view of a part of the inner surface of the upper case, and FIG. Fig. 6 is a plan view of the erasure prevention hole, Fig. 6 is an exploded perspective view, Fig. 7 is a perspective view of a part of the upper case seen from below, and Fig. 8 is a state in which the erasure prevention valve is incorporated in the lower case. A front view and FIG. 9 are sectional views taken along the line IX-IX in 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 Prevention hole, 12 ... Erase prevention valve, 13 ... Inner wall, 15 ... Main wall, 16 ... Locking arm, P ... Detection member.

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 so that it can slide along the inner back wall (13). 12) A tape cartridge whose upper limit of movement is regulated. 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.