JPH03183086A - Tape cartridge - Google Patents

Abstract

PURPOSE:To stably and easily execute temporary assembly by setting the upper end of an inner deep wall higher than a surface abutting upper and lower cases. CONSTITUTION:An inner deep wall 13 of an erroneous erasing preventing hole 11 in a lower case 1b is provided close to the inner direction of the case rather than a rear wall 10a of an upper case 1a and an erroneous erasing preventing valve 12 is equipped with a main wall 15, to which a detecting member P on a recorder side is operated, and a hook-shaped lock arm 16, which is protruded from this main wall 15 to the inner direction of the case, with a downward bent tip 16a. A lock arm 16 of the erroneous erasing preventing valve 12 is freely slid along the inner deep wall 13 over the upper end of the inner deep wall 13 and the upper end of the inner deep wall 13 is set higher than a surface PL abutting the upper and lower cases 1a and 1b. Thus, the temporary assembly can be stably and easily executed.

Description

Detailed Description of the Invention [Field of Industrial Application] The present invention relates to a tape cartridge equipped with an accidental erasure prevention means including a slide type accidental erasure prevention valve for identifying whether recording is possible or not. This is an improved version of the built-in anti-erasure valve.

[Conventional technology]

This type of accidental erasure prevention means includes a non-removable method in which the accidental erasure prevention valve provided on the rear wall of the main body case is broken off, and a switching method in which a slidable accidental erasure prevention valve opens and closes the accidental erasure prevention hole. . The switching type of erroneous erasure prevention means has the advantage of being reusable any number of times by switching the erroneous erasure prevention valve, so the non-removal type is being replaced by the slide switching type.

In this case, an accidental erasure prevention hole is formed in the rear wall of the main body case, which is formed by butting the upper and lower cases together, and extends inward into the case, and an accidental erasure prevention valve is installed in the accidental erasure prevention hole to indicate the recordable and unrecordable positions. It is built in so that it can be slid horizontally and horizontally.

[Problem to be solved by the invention]

However, the conventional switching type accidental erasure prevention valve does not come out of the accidental erasure prevention hole until the upper case is brought into contact with the lower case.

Therefore, in the pre-assembled state where the accidental erasure prevention valve is first assembled into the lower case, the accidental erasure prevention valve falls out of the accidental erasure prevention hole in the lower case during the process of covering the lower case with the upper case. The reality is that this is a bottleneck in automated assembly.

SUMMARY OF THE INVENTION Therefore, it is an object of the present invention to provide a tape cartridge in which an erroneous erasure prevention valve can be reliably temporarily assembled into a lower case, and which is advantageous for automation of assembly.

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

[Means to solve the problem]

For example, as shown in FIG.
The rear wall 10 of the lower case 1b of the main body case 1 is formed by butting together the 1b, and the rear wall 10 of the lower case 1b has an erroneous erasure prevention hole 11, and an erroneous erasure prevention valve 12 is installed in the erroneous erasure prevention hole 11, extending left and right across the unrecordable position and the recordable position. It is assumed that the tape cartridge has a built-in tape cartridge that can be slid in any direction.

Then, insert the inner back wall 13 into the accidental erasure prevention hole 11 of the lower case 1b at a position that is biased toward the inside of the case than the rear wall 10a of the upper case 1a, and at the abutting surface (P-L) of the upper and lower cases 1a and 1b. ) or more.

On the other hand, the erroneous erasure prevention valve 12 is assembled so that it can straddle the inner inner wall 13 of the lower case 1b and slide freely along the inner inner wall 13. For this purpose, the accidental erasure prevention valve 12 has a main wall 15 on which the recorder-side detection member P acts, and the main wall 15 has a downwardly curved hook-shaped tip 16a that straddles the inner inner wall 13. A stop arm 16 is attached.

[Effect]

The accidental erasure prevention valve 12 is pre-assembled by dropping it into the lower case 1b from above the accidental erasure prevention hole 11 and placing the locking arm 16 across the inner inner wall 13.

As a result, a stable pre-assembled state is obtained in which the erroneous erasure prevention valve 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 height of the inner back wall 13 is higher than that of the abutting surface (P-L).
3, the locking arm 16 can be straddled in a pre-loaded state, and the falling stroke of the accidental erasure prevention valve 12 from above can also be made smaller. Furthermore, the locking arm 16 of the erroneous erasure prevention valve 12 can be placed deeply over the inner inner wall 13, which improves the sliding performance.

〔Effect of the invention〕

In the accidental erasure prevention valve I2 of the present invention, the locking arm 1G is connected to the lower case 1.
It is designed to slide along the inner back wall 13 while straddling the upper end of the inner back wall 13 of b. Therefore, the accidental erasure prevention valve 1
2 can be easily and stably temporarily assembled into the narrow accidental erasure prevention hole 11 of the lower case tb by dropping it from above, and even if subjected to vibrations on the assembly line until the upper case 1a is covered, the accidental erasure prevention valve can be easily and stably assembled. 12 will not fall out from the accidental erasure prevention hole 11. As a result, the process of assembling the erroneous erasure prevention valve I2 to the lower case ib and the process of covering the upper case 1a can be carried out efficiently in a consistent operation, and the automatic mechanization of the assembly can be effectively achieved.

In particular, the height of the upper end of the inner wall 13 that supports the erroneous erasure prevention piece 12 has the advantage of improving the stability of the butting of the upper and lower cases Ia-1b and the sliding operation thereof.

〔Example〕

The figure shows a VHS-C type tape cartridge as an example, and its main case 1 consists of an upper case 1a and a lower case 1b made of plastic. The upper case 1a and the lower case 1b are each formed by dividing the main body case 1 into upper and lower halves, and are butted against each other. sign (
P-L) shows 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 inside the main body case 1. The tape 4 drawn out from the feeding tape reel 2 is wound onto the take-up tape reel 3 via guide members 5 provided on the left and right sides of the front end of the case. A tape loading pocket (not shown) is recessed between both guide members 5, 5, and the front outside of the tape 4 that crosses this pocket is covered with a front M7 attached to the main body case 1 when not in use. ing.

In FIG. 1, the rear wall 10 of the main case I is made up of rear walls 10a-10b of the upper and lower cases 1'a-1b butted against each other, and there is a slide-switching type error switch on the left corner of the rear wall 10 of the main case 1. It has erasure prevention means 9.

The erroneous erasure prevention means 9 includes an erroneous erasure prevention hole 11 recessed in the rear wall 10b of the lower case 1b.
1, the accidental erasure prevention valve 12 is set to the recording (recording) disabled position and the recording (
It is built in so that it can slide freely left and right across the recording possible position.

In FIG. 3, the accidental erasure prevention hole 11 is recessed in the left end side of the rear wall 10b of the lower case 1b so as to enter inside the case, and is similar to the accidental erasure prevention valve of the break-off type in the conventional tape cartridge. It is formed into a horizontally long rectangular shape when viewed from the front, including the setting position and extending leftward from the setting position.

At the inner depth of the erroneous erasure prevention hole 11, an inner inner wall 13 partitioned from the tape reel storage area is formed integrally with the rear wall IOb. As shown in FIG. 1, the inner back wall 13 is located at a position that is biased inward from the rear wall 10a of the upper case La located above it, and the abutment surface (P
・L) is set at the same height as the upper case 1a, and when the upper case 1a is placed on the lower case 1b, the rear wall 10 on the upper case 1a side
The lower end of a and the upper end of the inner wall 13 are opposed to each other in a staggered manner, with a gap 14 being formed between these opposing faces.

In FIGS. 1 and 3, the accidental 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 accidental erasure prevention hole ll. and has a tip 1 on the upper end side of the upper wall 15.
A hook-shaped locking arm 16 whose numeral 6a is bent downward extends integrally toward the inside of the case. The main wall 15 has a rectangular shape approximately the same size as the break-off type accidental erasure prevention valve in a conventional tape cartridge.

The accidental erasure prevention valve 12 is first assembled into the lower case 1b together with necessary parts such as the tape reels 2 and 3 and the guide member 5.

At this time, the erroneous erasure prevention valve 12 is dropped into the erroneous erasure prevention hole 11 from above. With this, the locking arm 16 is attached to the inner inner wall 13 so that its tip 16a is located on the inner surface side of the inner inner wall 13.
When straddled over the upper end, the inner surface side of the main wall 15 is the inner back wall 13.
The main wall 15 is temporarily assembled so that the outer surface of the main wall 15 is flush with the outer surface of the rear wall 10b.

The accidental erasure prevention valve 12 holds the upper end of the inner back wall 13 between the locking arm 16 and the inner surface of the main wall 5 so that it can slide freely in and out. Even if the accidental erasure prevention valve 12 is lifted up due to an upward impact, the lower case 1
It will not come off from b, nor will it fall to the rear of the case.

Next, when the upper case 1a is placed over the lower case 1b, as shown in FIG.
The root portion of the locking arm 16 fits into the gap 14 formed between the upper end of the inner back wall 13 of the rear wall 10a with a slight gap, and the lower end of the rear wall 10a is directly above the main wall 15. A state in which the parts are placed with a slight gap between them can be obtained. Therefore, the sliding movement of the erroneous erasure prevention valve 12 is reduced, and a secure state in which the valve 12 does not come up from the erroneous erasure prevention hole 11 can be obtained.

In addition, in the accidental erasure prevention valve 12, the outer surface of its main wall 15 is located inside the accidental erasure prevention hole 11, and the rear wall 10a of the upper and lower cases 1a and 1b is located inside the accidental erasure prevention hole 11.
- Since it is flush with the outer surface of the recorder 10b, even when it is loaded into a recorder, the recorder-side detection member P can be smoothly slid onto the outer surface of the recorder, thereby ensuring reliable detection of whether or not recording is possible.

By sliding the locking arm 16 in the left-right and lateral directions along the inner back wall 13, the accidental erasure prevention valve 12 can be moved between a recordable position on the right end side and an unrecordable position on the left end side in the accidental erasure prevention hole ll. can be switched over.

At this time, the locking arm 16 of the accidental erasure prevention valve 12 is connected to the inner back wall 13.
Since it straddles the upper end of the erroneous erasure prevention hole 11, it is prevented from falling off toward the outer surface of the opening of the erroneous erasure prevention hole 11. However, when the straddle depth is small, the accidental erasure prevention valve 12
There is a possibility that the lower end of 5 may be tilted in the direction of protruding from the bottom of the erroneous erasure prevention hole 11. In order to reliably prevent the accidental erasure prevention valve 12 from tilting and maintain its vertical posture more reliably, a recess i1% 18 is provided in the left and right direction in the bottom 17 of the accidental erasure prevention hole 11 in the figure. A convex portion 19 provided on the inner side of the lower end of the main wall 15 of the prevention valve 12 is slidably fitted into the groove 18.

[Another example]

It is preferable that the inner back wall 13 is set higher than the abutting surface (Pi). Therefore, in Figure 4, the inner back wall 1
The upper end of 3 reaches approximately the vertical center position 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
-L), so the accidental erasure prevention valve 1
2, the locking arm 16 may be hooked onto the upper end of the inner wall 13 in a pre-inserted state, and then dropped. At this time, the falling stroke of an assembly jig or the like that grips the erroneous erasure prevention valve 12 can also be made small. This also means that the locking arm 16 can be more deeply and securely straddled over the inner wall 13, and can be slid stably.

Further, the locking arm 16 of the accidental erasure prevention valve 12 has a tip 1 thereof.
The main wall 15 is formed longer than in the above embodiment to increase the depth at which it extends over the inner wall 13.
The engagement structure between the convex portion 19 and the groove 18 on the bottom can be omitted.

[Brief explanation of drawings]

1 to 3 show an embodiment of a tape cartridge according to the present invention, in which FIG. 1 is a longitudinal cross-sectional side view of the main parts, FIG. 2 is an internal plan view, and FIG. 3 is an exploded perspective view. It is. FIG. 4 is a longitudinal sectional side view of the main parts of another embodiment of the present invention, corresponding to FIG. 1. l...main case, 1a...upper case, 1b...lower case, IO...rear wall of main case, 10a...rear wall of upper case , tab... Rear wall of lower case, 11... Erroneous erasure prevention hole, 12... Erroneous erasure prevention valve, 13... Inner back wall, 15... Main wall, 16... Locking arm, P... Sensing part shrine, P-L... Butting surface. Inventor Mizu Valley
Yamanaka No. 1 Figure Lower Case Figure Figure b 8 9

Claims (1)

[Claims] 1. On the rear wall (10b) of the lower case (1b) of the main case (1) formed by butting together the upper and lower cases (1a, 1b),
An accidental erasure prevention hole (11) is recessed inward into the case, and an accidental erasure prevention valve (12) is installed in the accidental erasure prevention hole (11) in the left and right direction across the recordable position and the unrecordable position. In a tape cartridge built in such a way that it can be slid, the inner back wall (1) of the accidental erasure prevention hole (11) in the lower case (1b)
3) is located inward of the case from the rear wall (10a) of the upper case (1a), and the accidental erasure prevention valve (12) is connected to the detection member (P) on the recorder side.
It has a main wall (15) on which the main wall (15) acts, and a hook-shaped locking arm (16) that projects inward from the main wall (15) and has a downwardly bent tip (16a), Accidental erasure prevention valve (1
The locking arm (16) of 2) is slidable along the inner inner wall (13), straddling the upper end of the inner inner wall (13), and the upper end of the inner inner wall (13) Case (1a/1b
) A tape cartridge characterized in that the height is set to be higher than the abutting surfaces (P and L) of the two.