JPH0743824Y2 - Tape cartridge - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention relates to an improvement of a tape cartridge having a front lid with a back lid for protecting the tape, and in particular takes measures to assemble the back lid.

[Conventional technology]

As a conventional tape cartridge of this type, for example,
Some are for 8mm video, as shown in Figures and 4. In this case, a main body case 1 in which upper and lower plastic cases 1a and 1b are butted and integrally joined by screws or the like
The reels 3 around which the tape 2 is wound are rotatably housed and arranged on the left and right sides of the inside. Tape outlets 4 and 4 are formed in a front opening at the left and right portions of the front surface of the main body case 1, and a tape loading pocket 5 is formed at the center of the front surface of the main body case 1.
Is recessed in such a manner as to enter the inside of the case across the left and right tape outlets 4. At the front ends of the left and right side walls 14 in the pocket 5, a tape guide 16 having an arcuate cross section facing the tape outlet 4 is integrally formed. Then, the tape 2 is led out from one reel 3 to the front of the pocket 5 through the tape outlet 4 and the tape guide 16 in front of it, and the reel behind it via the tape outlet 4 and the tape guide 16 in the other. It is rolled up to 3.

On the front side of the main body case 1, a plastic front lid 6 for covering and protecting the front side of the tape 2 drawn out between the tape outlets 4 and 4 is rotatable around the left and right pivots 7. It is pivotally attached to the tape cartridge and can be switched between a closed posture that covers the front surface side of the tape 2 when the tape cartridge is not used and an upper opened posture that opens the front surface side when the tape cartridge is used.

Also, in the tape loading pocket 5,
The back cover 8 is biased toward the back side of the front cover 6. The back cover 8 covers the back surface side of the tape 2 when not in use, more specifically, the back surface side facing the lower side thereof and the opening upper surface side of the pocket 5.

In FIG. 4, the back cover 8 is a plastic molded product having a substantially T-shaped cross section, and an inclined wall 9 covering the back surface side of the tape 2,
It has an upper wall 10 which is connected to the upper end of the inclined wall 9 and covers the opening upper surface of the pocket 5. The inclined wall 9 is provided with a rotary shaft 11 near the center of each of the left and right edges 9a and 9b in the vertical direction,
This is rotatably pivoted to the left and right bearings 12 protrudingly provided on the rear surface of the front lid 6, and the sliding shafts 13 are attached to the left and right end edges 9a and 9b.
Is provided at a position lower than the rotary shaft 11 and is slidably fitted into the substantially S-shaped back cover guide grooves 15 provided on the left and right side walls 14, 14 in the pocket 5, respectively. The left and right case back guide grooves 15 face the inside of the pocket 5, respectively, by aligning the left side wall 14a on the upper case 1a side and the left side wall 14b on the lower case 1b side and the right side walls 14a and 14b respectively. It is formed. The tape guide
16 is integrally formed at the front ends of the left and right side walls 14a on the upper case 1a side.

The front lid 6 and the back lid 8 open upward from the closed posture shown by the solid line in FIG. That is, when the front lid 6 is opened and rotated upward from the closed posture, the back lid 8 rotates around the rotation axis 11 and the sliding shaft 13 moves along the back lid guide groove 15 while following the rotation.
It slides upward along with and opens upward together with the front lid 6 as shown by the chain double-dashed line in FIG.

[Problems to be solved by the device]

In the tape cartridge as described above, the front lid 6 and the back lid 8 attached to the front lid 6 in advance are assembled to the main body case 1, and the front lid 6 and the back lid 8 are composed of an upper case 1a and a lower case 1b. There is a method of assembling the upper case 1a before the butting. In that case, it is desirable to assemble the back cover 8 together with the front cover 6 to the upper case 1a from the front side in order to facilitate the automatic assembly.

The problem is in setting the clearance formed between the left and right end edges 9a, 9b of the back cover 8 and the left and right side walls 14a, 14a in the pocket 5 of the upper case 1a when adopting such an assembling method. That is, the larger the clearance, the easier it is for the back cover 8 to be fitted between the left and right side walls 14a, 14a in the pocket 5, but dust is more likely to enter and the dustproof effect of the back cover 8 is lost. In particular, a problem arises when the tape 2 is a vapor deposition tape that is easily corroded by airborne particulates such as sulfur and chlorine in the air, and mist-like substances such as sulfuric acid and nitric acid.
Therefore, it is preferable that the clearance is large on the assembling surface, and the clearance is preferably small on the surface for preventing the intrusion of dust, particularly the harmful substances. Therefore, the present invention is to select this clearance as small as possible. However, in that case, the projecting corner portion where the front edge of the upper eave wall 4a of each tape outlet 4 and the left and right sidewalls 14a of the pocket 5 intersects with the upper wall of the upper case 1a and is projected angularly. Therefore, the left and right edges 9a of the back cover 8 are
9b was caught, which reduced the workability of the assembly and made automatic mechanization of the assembly difficult.

The present invention has been made to solve these problems. The left and right edges 9a and 9b of the back cover 8 and the left and right side walls inside the pocket 5 are made.
The purpose of the present invention is to improve the automatic assembling performance of the back cover 8 while keeping the clearance between 14a and 14a small to prevent dust from entering.

[Means for Solving the Problems]

The present invention relates to the above-mentioned tape cartridge having the front cover 6 and the back cover 8 on the main body case 1 composed of the upper and lower cases 1a and 1b, as shown in FIG. 1 and FIG.
Front edge of the upper eaves wall 4a of each tape outlet 4 and the left and right side walls 14a in the pocket 5 on the upper case 1a side.
The chamfered part 17 with a forward sloping slope is formed at the projected corner where
Is characterized in that each is provided.

[Action]

When assembling the back cover 8 together with the front cover 6 from the front to the upper case 1a, the back cover 8 is slightly displaced in the left-right direction, and the upper ends of the left and right edge edges 9a and 9b of the back cover 8 are the problematic corners. Even if it touches a corner, the corresponding part is formed on the chamfered part 17, so
The left and right edges 9a and 9b are slid and guided by the corresponding chamfered portion 17 and can be fitted into the pocket 5 without being caught.

[Effect of device]

Therefore, according to the present invention, by providing the chamfered portion 17 at the projecting corner portion of the problem, the back lid 8 can be easily assembled together with the front lid 6 to the upper case 1a from the front side thereof. It also has the merit of mechanization. This means that the clearance between the left and right edges 9a and 9b of the back cover 8 and the left and right side walls 14a and 14a in the pocket 5 of the upper case 1a can be set as small as possible, which is also advantageous in terms of dust prevention. It is possible to obtain a good tape cartridge.

〔Example〕

An embodiment of the present invention will be described with reference to FIGS. 1 (a) and (b) and FIG.

Since the overall structure of the tape cartridge shown in this embodiment is almost the same as the conventional one described above, the same parts as those described above are denoted by the same reference numerals and the description thereof will be omitted.
Only points different from the conventional body case 1 and back cover 8 will be described.

FIG. 1 (a) is an external plan view of the upper case 1a of the main body case 1 and a cross-sectional plan view of the front cover 6 and the back cover 8 which are being assembled into the upper case 1a, and FIG. FIG. 2 is a partial perspective view showing the rear case and the upper case 1a and the lower case 1b separated from each other.

Left and right edges of the inclined wall 9 of the back cover 8 attached to the back side of the front cover 6.
The length between 9a and 9b is the left and right side walls in the pocket 5 of the upper case 1a.
It is set as close as possible to the inner dimension between 14 and 14.
Thus, at the corners of the upper wall of the upper case 1a that intersect the front edge of the upper eave wall 4a of the left and right tape outlets 4 and the left and right side walls 14a, 14a in the pocket 5 on the upper case 1a side. , And a chamfered portion 17 having an inclined front divergence.
In the illustrated example, since the tape guides 16 facing the respective tape outlets 4 are provided on the upper case 1a side, the chamfered portions 17 including the tape guides 16 are provided in the vertical direction.

Therefore, the back cover 8 having a left-right length set to the inner dimension between the left and right side walls 14a and 14a in the pocket 5 is elastically deformed from the front cover 6 together with the front cover 6 from the front of the front cover 6 to the front case 1a. When forcibly assembling by using, even if the back cover 8 is slightly displaced from the front of the pocket 5 in the left-right direction, the left end edge 9a or the right end edge 9b on the displacement direction side is located above the chamfered portion 17. It slips and is easily pushed into the pocket 5. As shown in FIG. 1 (b), the back lid 8 after being pushed in should have the left end edge 9a and the right end edge 9b as close as possible to the left side wall 14a and the right side edge 14a, respectively, with extremely small clearances. You can

[Brief description of drawings]

1 (a), (b) and FIG. 2 show an embodiment of the tape cartridge according to the present invention, and FIG.
Is a plan view showing a state in which the front lid and the back lid are being assembled into the upper case by breaking the front lid and the back lid, FIG. 1 (b) is a plan view showing the state after the assembly, and FIG. FIG. 3 is a partial perspective view showing a case and a lower case separated from each other. FIGS. 3 and 4 show a conventional tape cartridge, FIG. 3 is an exploded perspective view, and FIG. 4 is a sectional view in an assembled state. 1 …… Main body case, 1a …… Upper case, 1b …… Lower case,
2 …… tape, 4 …… tape outlet, 5 …… pocket,
6 ... Front cover, 8 ... Back cover, 9a / 9b ... Left and right edge, 14a ...
… Left and right side walls in the upper case pocket, 17 …… Chamfer.

Claims (1)

[Scope of utility model registration request] 1. Upper and lower cases 1a and 1b formed by butting each other
Left and right tape outlets 4 and 4 are formed on the front surface of the tape, and a tape loading pocket 5 is recessed between the tape outlets 4 and 4, and the tape is drawn on the front side of the upper and lower cases 1a and 1b. A front lid 6 that covers the front side of the lead-out portion of the tape 2 that is led out between the outlets 4 and a back side of the front lid 6 that is attached to the back side of the tape 2 and that covers the back side of the lead-out portion of the tape 2. In a tape cartridge in which a back cover 8 is pivotally attached in an openable and closable manner, in the upper wall of the upper case 1a, the front edge of the upper eave wall 4a of each tape outlet 4, and the pocket 5 on the upper case 1a side. A tape cartridge characterized in that a chamfered portion (17) having a forward sloping slope is provided at each corner portion where the left and right side walls (14a) intersect with each other.