JPS60229285A - Tape cartridge - Google Patents

Abstract

PURPOSE:To prevent a tape from contacting and interfering with the upper edge of the opening when pulling out the tape and to prevent damage to be inflicted on the tape by setting the upper edge of the opening of a tape outlet at the position which is deviated from a tape guide surface of right and left edges of the opening to the backward of a case main body. CONSTITUTION:Opening right and left edges 4b, 4c of right and left tape outlets 4 are formed in a half-cylindrical shape in cross-section so as to be a guide surface of a tape 2, while an opening lower edge 4d is caused to protrude slightly forward from the opening right and left edges 4b and 4c and raised slightly higher than an inner face 9b of a bottom wall 9, thereby limiting downward actions of the tape 2. An opening upper edge 4a is set at the position deviated to the case backward from the right and left edges 4b and 4c and the lower edge 4d. As a result, even if the tape 2 is inclined upward due to rips, etc., of a tape guide pin at the time of the tape pulling out travel, the tape can avoid being contact with the opening upper edge 4a, and the tape bending and damages can be prevented accordingly.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a tape cartridge provided with tape draw-out openings on the front left and right sides of a main body case for drawing out the tape to the front.
By improving the shape of the tape outlet, the purpose is to prevent damage to the tape due to contact with the outlet.

A video tape cartridge as shown in FIGS. 1 and 2 has reels 3, 3, on which tape 2 is wound, built into the left and right sides of the main body case 1, and tape outlet ports 4, 4 on the left and right sides of the front surface of the main body case 1. A pocket 5 is formed in a front opening shape, and a pocket 5 is formed in the central part of the front face of the main body case 1, extending between the left and right tape outlet ports 4 and extending toward the inside of the case. Then, the tape 2 is led out from one glue roll 3 through the tape outlet 4 on the same side to the front of the pocket 5, introduced into the tape outlet 4 on the other side, and wound onto the other tape roll 4. It will be done.

However, as shown in FIG. 6, in the tape outlet 4, the upper edge 4a of the opening is connected to the left and right edges 4b and 4c and the lower edge 4d.
The opening end face of the outlet 4 formed by the road surface and the road surface are in the same state. This causes problems such as the 8th order. That is, when this tape cartridge is loaded into the video deck, the tape drawer bin 6 and tape guide bin 7 on the video deck side enter the pocket 5 from below the case, and the tape guide bin 7 is inserted into the main body case 1 as shown by reference numeral B in the figure.
moves the tape 2 forward to separate it from the tape guide surface 8 formed on the pocket 5 side of the tape outlet 4, and at the same time the tape is guided through the tape guide bin 7, the tape extractor pin 6 The tape 2 is moved around the rotating head on the video deck side by moving in the direction of the arrow indicated by the middle symbol A.

At this time, the tape guide bin 7 may be slightly tilted due to the tape tension due to manufacturing variations or the like. This inclination causes the tape 2 to move upward, causing the upper edge of the tape 2 to slide against the upper edge 4a of the opening of the tape outlet 4, causing the tape to break and cause damage.

This invention has focused on this fact, and by providing the upper edge of the opening of the tape outlet to be biased toward the rear side of the case than the opening end surface of the tape outlet, when the tape moves upward when the tape is being drawn out. However, it is designed to prevent the tape from coming into contact with the upper edge of the opening of the tape outlet, thereby preventing bending and damage to the tape.

The details will be explained below based on the drawings.

FIGS. 1 and 2 show an example of a small video tape cartridge, the main body 1 of which is made up of upper and lower plastic cases 1a and 1b joined together with lids. Reel 3 on which tape 2 is wound
3 is rotatably mounted on each of the left and right drive shaft insertion holes 10 opened in the bottom wall 9 of the lower case lb, and tape outlet ports 4 are formed in the front left and right sides of the main body case 1 in the shape of a front opening; The tape 2 is led out from one reel 3 to the front of the case through these tape outlet ports 4, 4, and wound onto the other reel 3. A pocket 5 into which the video deck side tape pull-out pin 6 and tape guide bin 7 can be inserted is formed in the front central part of the main body case l, extending between the left and right tape draw-out ports 4 and 4, and extending toward the inside of the case. 1 is equipped with a front lid 11 that can be opened and closed on the front side of the tape 2, and when not in use, the front lid 11 covers and protects the front side of the tape 2 stretched between the tape outlet ports 4 and 4. When the tape cartridge is loaded into the video deck, the front cover 11 opens upward, and the tape 2 is pulled out to the front of the case by the tape guide bin 7 and the tape pull-out pin 6, which are inserted into the pocket 5 from below. A reel brake 12 is built into the rear central portion of the main body case 1 in the left and right direction, and the reel brake 12 allows a brake piece 19 to be freely engaged with and disengaged from engagement teeth 18 on the periphery of the lower flange 3a of the reel 3.

If the pocket 5 into which the tape guide bin 7 and tape pull-out pin 6 are inserted is recessed into a large recess as shown in the illustrated example, the tape 2 stretched between the left and right tape pull-out openings 4 can be easily removed when not in use. Although the outside of the front surface is covered by the front lid 11, it comes into contact with dust that enters from the lower and upper surfaces of the opening of the pocket 5, so this must be prevented.

Therefore, as shown in FIGS. 2 and 5, a dust cover 16. is pivoted so that it can swing freely.

This dust cover 16 seals the inside of the tape 2 including the lower side and the upper surface of the opening of the pocket 5 when not in use, thereby preventing dust from adhering to the tape 2. This dust cover 16 has cam pins 20 at its left and right ends, and the cam pins 20 are connected to cam grooves 17 and 1 provided on the left and right sides of the pocket 5.
7, and when the front cover 11 is opened, the dust cover 16 moves into the cam groove 17 without interfering with the tape 2 at all.
17 along with the front lid 11.

In a tape cartridge having such a structure, the present invention is characterized by the shape or structure of the tape outlet 4.

Each of the left and right tape outlet ports 4 has a rectangular opening in front and has upper and lower opening edges 4a and 4d that are vertically parallel, and left and right opening edges 4b and 4c that are parallel to the left and right. Among them, the opening left edge 4b facing the pocket 5 side of the tape outlet 4 on the right side, and the opening right edge 4b facing the pocket 5 side of the tape outlet 4 on the left side.
c are each formed to have a semi-cylindrical cross-section, are erected from the bottom wall 9 of the lower case 1b, are in contact with the inner surface of the earthen wall of the upper case 1a, and have the outer arc surface of the semi-cylindrical shape as the tape guide surface 8. do. It faces the left and right edges 4b and 4c of the opening. The left opening edge 4b of the tape outlet 4 on the left side and the right opening edge 4c of the tape outlet 4 on the right side.

These correspond to the front edges of the left and right side walls 13 and 14 of the upper and lower cases la and 1b, respectively, which are butted against each other.

The lower edge 4d of the opening is the front protrusion 9a of the bottom wall 9 of the lower case 1b.
The lower edge 4d of the opening coincides with the front edge of the opening, and the lower edge 4d of the opening coincides with the left and right edges 4b of the opening.
- It protrudes a little further forward than 4C and is raised a little higher than the inner surface 9b of the bottom wall 9 to restrict the downward movement of the tape 2 and to receive and support the notch 11a on the lower edge of the front cover 11.

The upper edge 4a of the opening is the front protrusion 2 of the upper wall 21 of the upper case 1a.
The upper edge 4a of the opening coincides with the front edge of the opening 1a, and the upper edge 4a of the opening is set at a position biased toward the rear of the case than the left and right edges 4b and 4C of the opening and the lower edge 4d of the opening. Opening left and right edges 4 of this opening upper edge 4a
It is preferable that the deviation amount d from b.4C is set to at least an amount equal to or greater than the distance e between the lower edge 4d of the five openings and the upper edge 4a of the openings minus the width of the tape 2 (the amount of play in the tape).

Note that the front end 21b of the upper surface of the front protrusion 21a of the upper wall 21 is formed slightly lower than other parts of the upper surface.

The upper wall 15 of the front cover 11 in the closed state is placed on the lower front end 21b of the upper surface so that the upper surface of the upper wall 15 and the upper surface of the upper wall 21 of the upper case 1a are at the road surface.

As described above, in this invention, the upper edge 4a of the tape outlet 4 is biased toward the rear side of the case than the left edge 4b of the opening or the right edge 4C of the opening, which has the tape guide surface 8, as shown in FIG. In this manner, even when the tape 2 moves upward due to the fall of the tape guide bin 7 or the tape drawer bin 6 during the tape drawer run, the tape 2 is prevented from coming into contact with the upper edge 4a of the opening. Therefore, bending and damage to the tape 2 can be prevented.

[Brief explanation of drawings]

Fig. 1 is a perspective view illustrating the tape cartridge according to the present invention with the front lid open, Fig. 2 is a plan view showing the inside, Fig. 3 is a perspective view of the tape outlet on the right side, and Fig. 4. is a sectional view taken along the line IV-IV in FIG. 2, and FIG. 5 is a sectional view taken along the line V-V in FIG. FIG. 6 is a longitudinal sectional side view of a conventional tape outlet. ■・・・Body case. 2...Tape. 3...Reel 5 4...Tape outlet. 4a, 4b... Left and right edges of the opening. 8...Tape guide surface. Patent Applicant Hitachi Maxell Co., Ltd.
Hitachi, Ltd. Figure 6 Figure 4 Figure 3 Figure 5

Claims (1)

[Claims] +11 A reel 3 on which the tape 2 is wound is built into the main body case 1, and a tape outlet 4 is provided on the front left and right sides of the main body case 1, and the tape 2 is drawn out from the tape outlet 4 to the front of the main body case 1. In tape cartridges,
A tape cartridge characterized in that the upper opening edge 4a of the tape outlet 4 is set at a position biased toward the rear side of the main body case 1 than the opening left edge 4b or the opening right edge 4c having the tape guide surface 8. .