JPH03183083A - Tape cartridge - Google Patents

Abstract

PURPOSE:To prevent an erroneous erasing preventing valve from dropping upward by engaging the valve to the upper end of an inner deep wall on a lower case side over the lock arm of the erroneous erasing preventing valve. CONSTITUTION:When a lower case 1b is covered with an upper case 1a, on the inner surface of a rear wall 10a of the upper case 1a, one or more than two ribs 30 are integrally protruded and formed so as to be vertically extended from the inner top surface. In the state of coupling the upper and lower cases 1a and 1b, these ribs 30 are positioned so as to be close faced to the upper direction of an erroneous erasing preventing valve 12 even when the valve is set at a recordable position or an unrecordable position. Thus, it is regulated for the valve 12 to be loosely moved upward from an inner deep wall 13 more than needed while being abutted to the lower end of the rib 30. Therefore, even when the valve 12 is pushed up by unnatural force and a main wall 15 tries to go over the inside of the rear wall 10a of the upper case 1a in addition to the bending deformation of the inner deep wall 13 to a case front side at one part, a lock arm 16 of the valve 12 is abutted to the lower end of the rib 30 and interfers the rib 30 and therefore, the upward move is blocked without fail.

Description

[Detailed Description of the Invention] [Industrial Field of Application] The present invention is characterized in that an erroneous erasure prevention hole is formed in the rear wall of the main body case and is recessed in a shape that extends into the case. A tape cartridge in which a prevention valve is incorporated so as to be slidable in the left and right directions between a recordable position and a non-recordable position is characterized by a means for restricting upward movement of the accidental erasure prevention valve.

[Conventional technology]

When assembling the accidental erasure prevention valve to the main case, which consists of an upper and a lower case, first assemble it to the lower case side, then cover the lower case with the upper case, and remove the accidental erasure prevention valve from above the case. This prevents people from falling backwards, etc.

[Problem to be solved by the invention]

If such a conventional accidental erasure prevention valve is left in the pre-assembled state that has been pre-assembled to the lower case, the accidental erasure prevention valve installed on the lower case may be caused by vibration etc. during the process of covering the lower case with the upper case. It tends to fall out of the prevention hole or shift position.

SUMMARY OF THE INVENTION An object of the present invention is to provide a tape cartridge that is easy to assemble and can effectively prevent the accidental erasure prevention valve that has been temporarily assembled into the lower case on the assembly line from being removed, fallen down, or shifted.

Another object of the present invention is to provide a tape cartridge in which the accidental erasure prevention valve is prevented from moving upward more than necessary and becoming inoperable even after the main assembly in which the upper and lower cases are connected.

[Means to solve the problem]

For example, as shown in FIG. 1, the present invention provides upper and lower cases 1a.
・Lower case 1b of main case 1 formed by butting 1b together
An erroneous erasure prevention hole 11 is formed in the rear wall 10b so as to extend into the case, and an erroneous erasure prevention valve 12 is slid into the erroneous erasure prevention hole 11 in the left and right directions between the recordable position and the unrecordable position. Assumes an operably installed tape cartridge.

Furthermore, an inner back wall 13 is provided in the erroneous erasure prevention hole 11 of the lower case 1b so that it is located at a position biased toward the inside of the case than the rear wall 10a of the upper case 1aO. On the other hand, the erroneous erasure prevention valve I2 is assembled so as to straddle the inner inner wall 13 of the lower case 1b and to be slidable along the inner inner wall 13. For this purpose, the accidental erasure prevention valve 12 has a main wall 15 that prevents the recorder-side detection piece P from entering the accidental erasure prevention hole 11, and has a main wall 15 that is connected to the main wall 15 so as to straddle the inner inner wall 13. A stop arm 16 is attached. The locking arm 16 includes a horizontal arm portion 16a that integrally projects inward from the main wall 15 and the arm portion 16.
It is formed into a hook shape with a vertical arm portion 16b extending downwardly from a portion a.

Thus, the accidental erasure prevention valve 12 is installed on the inner surface of the upper case 1a.
It is required that the rib 30 that restricts upward movement be located above the horizontal arm portion 16a of the accidental erasure prevention valve 12.

More preferably, a moderation means is provided between the aforementioned locking arm 16 and the upper end surface 13a of the inner inner wall 13 for positioning and holding the accidental erasure prevention valve 12 in the recordable position and the recordable position, respectively. As a means of moderation, the accidental erasure prevention valve 1
The horizontal arm portion 16 a of the second locking arm 16 is connected to the main wall 15 and is elastically deformable in the vertical direction using the base as a fulcrum. The upper end surface 13a may be provided with a moderation convex portion 21 and four moderation portions 23 that engage and disengage from each other through elastic deformation of the locking arm 16 as the accidental erasure prevention valve 12 slides. can.

[Operation] When the erroneous erasure prevention valve 12 is inserted into the erroneous erasure prevention hole 11 of the lower case 1b from above, it is in a temporarily assembled state in which the locking arm 16 straddles the upper end of the inner inner wall 13.

In this way, the locking arm 16 of the accidental erasure prevention valve 12 is connected to the lower case 1.
By straddling the inner back wall 13 of b, the accidental erasure prevention valve 12
will not fall out from the accidental erasure prevention hole 11 toward the rear of the case, nor will it come out from the upper side of the case.

In the fully assembled state in which the upper case 1a is placed over the lower case 1b, the rib 30 on the rear side of the upper case prevents the accidental erasure prevention valve 12 from moving up more than necessary.

The concave and convex portions 23 and 21 for moderation are for positioning the erroneous erasure prevention valve 12 at a recordable position and a recordable position within the erroneous erasure prevention hole ll.

〔Effect of the invention〕

According to the present invention, the accidental erasure prevention valve 12 is connected to the lower case 1.
It can be easily pre-assembled into the narrow erroneous erasure prevention hole 11 of b by dropping it from above. At that time, even if it is subjected to vibrations etc. on the assembly line until the upper case 1a is covered, the locking arm 6 of the accidental erasure prevention valve 12 is engaged with the upper end of the inner wall 13 on the rear side of the lower case in a straddling state. Therefore, when temporarily assembled into the lower case 1b, the erroneous erasure prevention valve 12 will not fall out from the erroneous erasure prevention hole 11 toward the rear of the case or be removed upward. Therefore, the lower case tb of the accidental erasure prevention valve I2 can be easily assembled by integrating the process and the covering process of the upper case 1a, and automatic mechanization of the assembly can be easily realized.

An accidental erasure prevention valve 12 is provided on the inner surface of the rear wall 10a of the upper case 1a.
Since the rib 3o that restricts upward movement is provided, the accidental erasure prevention valve 12 is protected against fall impact force, and especially when the main wall 15 is pushed up strongly from the outside during a slide operation. Inconveniences such as the main wall 15 of the main wall 15 pushing up inside the rear wall 10a of the upper case 1a and becoming unable to slide can be well prevented.

〔Example〕

The drawings illustrate a VHS-C type tape cartridge, and in FIGS. 2 and 3, the main body case 1 is formed by screwing together upper and lower plastic cases Ia and 1b with their lids aligned. .

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 6 is recessed between both guide members 5, 5, and the front outer side of the tape 4 crossing this pocket 6 is covered by a front M7 attached to the main body case 1 when not in use.

The rear wall 10 of the main body case l is formed by abutting the rear walls 10a and 10b of the upper and lower cases 1a and 1b, and has a slide-switchable accidental erasure prevention means 9 at the left corner of the rear wall lO of the main body case l.

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

In FIG. 4 and FIG. 6, the accidental erasure prevention hole 11 is recessed in the left end side of the rear wall 10b of the lower case 1b, and is recessed into the inside of the case. It is formed into a horizontally long rectangular shape when viewed from the front, including the setting position of the erasure prevention valve and extending leftward from this setting position.

At the inner back of the accidental erasure prevention hole 11, an inner back wall 13 is formed integrally with the rear wall 10b to separate it from the tape reel storage area.9 The inner back wall 13 is the rear wall of the upper case 1a located above this. 10a, and when the upper case 1a is placed over the lower case 1b, the first
As shown in the figure, the lower end of the rear wall 10a on the upper case 1a side and the upper end surface 13a of the inner back wall 13 face each other in an alternating manner.
A gap 14 is formed between these opposing sides.

In FIGS. 1, 6, and 7, the accidental erasure prevention valve 1
2 is a plastic molded product, which has a vertical main wall 15 that prevents the lever-type detection piece P on the recorder side from entering the accidental erasure prevention hole 11, and a horizontal arm extending from the upper end of the upper wall 15. The portion 16a is provided to protrude horizontally toward the inside of the case,
Further, a vertical arm 16b is bent downward from the protruding end of the arm 16a to form a hook-shaped locking arm 16 integrally with the main wall 15. 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.

When assembling the accidental erasure prevention valve 12, it is first assembled into the lower case Ib along 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. Now, as shown in FIGS. 1 and 4, the horizontal arm portion 16a is positioned on the upper end surface 13a of the inner inner wall 13, and the vertical arm portion 16b is positioned on the inner surface side of the inner inner wall I3. Let me straddle you. Then, the outer surface of the main wall 15 is assembled flush with the outer surface of the rear wall 10b.

Next, when the upper case 1a is placed over the lower case ib, as shown in FIG.
The horizontal arm portion 16a of the locking arm 16 fits in the gap 14 formed between the upper end surface 13a and the rear wall 10a so that it can be elastically deformed in the vertical direction with a slight gap, and the lower end of the rear wall 10a is the main A state where it is located directly above the wall 15 with a slight gap is obtained. In addition, the main//outer surface of the wall 15 of the accidental erasure prevention valve 12 is connected to the upper and lower cases 1 within the accidental erasure prevention hole H.
Since it is flush with the outer surface of the rear walls 10a and 10b of a-1b, the detection piece P on the recorder side when loaded into the recorder.
can be slid smoothly over their outer surfaces to ensure reliable detection of recordability.

Furthermore, when the upper case 1a is placed over the lower case 1b, one or more ribs 30 are integrally protruded from the inner surface of the rear wall 10a of the upper case 1a and extend in the vertical direction from the inner top surface. It is. When the upper and lower cases Ia and 1b are combined, this rib 30 is located close to and opposite to the upper part of the erroneous erasure prevention valve 12 when the erroneous erasure prevention valve 12 is in either the recordable position or the unrecordable position. As a result, the accidental erasure prevention valve 12 is prevented from moving upward from the inner inner wall 13 more than necessary by contacting the lower end of the rib 30.

Therefore, the accidental erasure prevention valve 12 is pushed up by an unreasonable force, and the main wall 15 is pushed inside the rear wall 10a of the upper case 1a due to the bending deformation of the inner back wall 13 toward the front of the case. Even if it tries to move up, the accidental erasure prevention valve 12 is locked @16
Since it abuts and interferes with the lower end of the rib 30, its upward movement is reliably prevented. Note that the rib 30 is attached to the upper case 1.
Since the position is set to correspond to the position near the transparent window 31 for visually checking the remaining amount of tape provided on the upper wall of a, it is possible to prevent the complication of seeing the accidental erasure prevention valve 12 through the transparent window 31. become.

By sliding the locking arm 16 in the left and right directions along the inner back wall 16, the accidental erasure prevention valve 12 is moved to the right end side inside the accidental erasure prevention hole 11 as shown in the solid line state in FIG. 3 and in FIG. It is possible to switch between the recordable position, the state indicated by the virtual line in FIG. 3, and the unrecordable position on the left end side as shown in FIG.

At this time, the erroneous erasure prevention valve 12 is connected to the locking arm (6 is the inner back wall 13
Since it straddles the upper end surface 13a of the
It is prevented from falling off towards the outer surface of the opening. However, if the straddle depth is small, there is a risk that the lower end of the main wall 15 of the accidental erasure prevention valve 12 may tilt in a direction that protrudes from the bottom of the accidental erasure prevention hole 11. In order to reliably prevent the accidental erasure prevention valve 12 from tilting and maintain its vertical posture more reliably, grooves 18 are provided in the bottom of the accidental erasure prevention carpenter 1 in the left and right directions in the figure. The protrusion 19 provided on the inner side of the lower end of the main wall 15 of 12 is fitted into the internuclear i'l 18. In this case, the convex portion 19 of the accidental erasure prevention valve 12 and the concave groove 1
If the locking arm 16 is suspended from the inner back wall work 3 so as to form a slight gap between the locking arm 16 and the bottom of the erroneous erasure prevention valve 1.
This means that the slide operation described in step 2 can be performed more easily.

As a positioning and holding means for holding the accidental erasure prevention valve 12 at each switching position, a moderation convex portion 21 is provided on the lower surface side of the horizontal arm portion 16a, as shown in FIGS. 1 and 4. on the other hand,
Moderation recesses 2 at three locations on the left and right of the upper end surface 13a of the inner back wall 13
form 3. Therefore, when the accidental erasure prevention valve 12 is completely switched to the unrecordable position and the recordable position, the moderation convex part 21 connects with the main wall 15 of the horizontal arm part 16a in the vertical direction with the base as the fulcrum. It engages with each moderation recess 23 through elastic deformation of the erroneous erasure prevention valve (2) to restrict free lateral movement.

Due to the presence of the moderation uneven portions 23 and 21, the accidental erasure prevention valve 1
2 can be pre-assembled in the lower case 1b in the erroneous erasure prevention hole 11 and positioned at a recordable position or a recordable position. However, with only the engaged state of the moderation uneven portions 23 and 21, the accidental erasure prevention valve 12 is subjected to vibrations etc. during the process of covering it with the upper case 1a on the assembly line. may rise from the inner back wall 13 and shift laterally.

Therefore, as shown in FIGS. 1 and 4, the inner back wall 13
On the inner surface side, a vertical groove 24 is provided at a position corresponding to the moderation recess 23 and is longer in the vertical direction than the engagement depth of the moderation uneven portions 23 and 21. On the other hand, the vertical arm portion 16b is provided with a linear protrusion 25 that engages with the vertical groove 24. Thus, when the erroneous erasure prevention valve 12 is in the recordable position and the recordable position on the upper end surface 13a of the inner inner wall I3, the moderation uneven portion 23.
Even if the engagement state of the valves 21 and 21 rises to a height where they are released, the engagement between the vertical grooves 24 and the protrusions 25 prevents the accidental erasure prevention valve 1 from being removed.
2 so that it does not shift left or right.

The moderation uneven parts 23 and 21, the vertical groove 24, and the protrusion 25 are each provided with a taper so that the accidental erasure prevention valve 12 can be slid with a light operating force. It is preferable to set the taper more gently than the taber of No. 23 in that the sliding operation can be performed more smoothly.

When the accidental erasure prevention valve 12 is switched to the recordable position, as shown in FIG. 3 and FIG. An operation groove 26 into which a fingertip or the like can be inserted is formed in. Also, in the state indicated by the two-dot chain line in FIG. 3 and in the state in which the accidental erasure prevention valve 12 is switched to the unrecordable position as shown in FIG.
An operation groove 27 into which a fingertip or the like can be inserted is formed between the left end 15b of the main wall 15 of the accidental erasure prevention valve 12 and the left end wall inside the accidental erasure prevention hole 11. Thus, even when the outer surface of the main wall 15 of the accidental erasure prevention valve 12 is flush with the outer surface of the case rear wall LO,
By placing the fingertips on these operating grooves 26 and 27, the user can easily slide the erroneous erasure prevention valve 12.

As shown in FIGS. 1 and 6, a joining claw 28 is integrally provided upwardly projecting from the left end of the accidental erasure prevention hole 11 of the lower case 1b. The tip of the connecting claw 28 is inserted into a hole 29 provided in the rear wall 10a of the upper case 1a from inside the upper case, so that the upper and lower cases 1a-1b are integrally joined at the corner portion. The operating groove 27 is formed below the connecting claw 28 to make effective use of the narrow space.

[Another example]

The lip 30 does not need to be hung down from the inner top surface of the upper case 1a and connected to the rear wall 10a. Of course, the rib 30 may protrude horizontally only from the rear wall 10a of the upper case.

BRIEF DESCRIPTION OF THE DRAWINGS FIGS. 1 to 7 show an embodiment of the tape cartridge according to the present invention, in which FIG. 1 is a longitudinal cross-sectional side view of the main part, FIG. 2 is a plan view of the inside, and FIG. Figure 3 is a rear view, Figure 4 is a plan view with the accidental erasure prevention valve held in the recordable position, Figure 5 is a plan view with the accidental erasure prevention valve held in the unrecordable position, and Figure 6. The figure is an exploded perspective view, and Figure 7 is a perspective view of the accidental erasure prevention valve seen from behind.

1... Main body case, 1a...Top case, ■b...Lower case, 10... Rear wall of main case, 10a...Rear wall of upper case, 10b... Rear wall of the lower case, 11... Erroneous erasure prevention hole, 12... Erroneous erasure prevention valve, 13... inner back wall, 15... Main wall, 16...Latching arm, 16a...Horizontal arm part, 16b...Vertical arm part, 21... Moderation convex part, 23... Moderation recess 30...Rib, P...Detection piece.

Departure Akira person water No. figure Lower case

Claims (1)

[Claims] 1. The main body case 1 is formed by joining the upper and lower cases (1a and 1b) with their lids aligned, and the rear wall (10b) of the lower case (1b) is provided with an accidental erasure prevention hole (
11) is recessed into the inside of the case, and an accidental erasure prevention valve (12) is built into the accidental erasure prevention hole (11) so that it can be slid left and right across the recordable position and the unrecordable position. For tape cartridges that are equipped with
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 the main part on which the detection piece (P) on the recorder side acts. It has a wall (15) and a locking arm (16), and the locking arm (16) has a horizontal arm (16a) projecting inward from the main wall (15) and a horizontal arm (16a). Arm (16a)
The locking arm (16) of the accidental erasure prevention valve (12) is connected to the upper end of the inner wall (13). There is a rib (30) on the inner surface of the upper case (1a) that restricts the upward movement of the accidental erasure prevention valve (12). is the accidental erasure prevention valve (12
1.) A tape cartridge characterized in that the tape cartridge is located above the horizontal arm portion (16a) of the tape cartridge. 2. A moderation means is provided between the locking arm (16) and the inner wall (13) for positioning and holding the accidental erasure prevention valve (12) in a recordable position and a recordable position, respectively; The moderation means moves the locking arm (16) to the horizontal arm portion (16a).
) is formed to be elastically deformable in the vertical direction using the connecting base of the accidental erasure prevention valve (12) with the main wall (15) as a fulcrum, and then ) is provided with a moderation convex portion (21) and a moderation concave portion (21) that engage and disengage from each other through elastic deformation of the locking arm (16) as the accidental erasure prevention valve (12) slides. 23) The tape cartridge according to claim 1, further comprising: 23).