JPH0589633A - Tape cartridge - Google Patents

Abstract

PURPOSE:To dissolve such a problem that the front section of the main body case of a tape cartridge provided with a tape protective front lid which is forcibly closed by means of a spring loses touch with the surface of the holder of a tape deck when the front lid is oscillated due to its upward opening movement while the main body case is mounted on the holder. CONSTITUTION:Engagement sections 25 are provided in the front end section 24 of the peripheral wall of a main body case 1 in corresponding to stoppers 21 provided on the holder 20 of a tape deck. The engagement sections 25 are engaged with the stoppers 21 when this tape cartridge is mounted on the holder 20.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tape cartridge for recording and reproducing signals by pulling a tape forward of a main body case.

[0002]

2. Description of the Related Art This type of tape cartridge has tape outlets on the left and right sides of the front surface of the main body case so that the tape hung between the tape guides of the both outlets can be drawn out to the front of the case. Then, in order to protect the tape when it is not used, the outer surface of the tape is covered with a front lid and is closed and urged by a spring. There are some differences in the tape protection structure of the front lid depending on the system such as VHS system, β system and 8 mm video system, but in all cases the front lid is biased by the spring and the lock mechanism keeps the lid closed state. The points that they do are common. An example thereof can be found in Japanese Utility Model Publication No. 63-49910.

[0003]

A tape cartridge provided with such a front lid is unlocked by utilizing the insertion and loading operation into the tape deck, and thereafter the front lid is opened against the biasing force of the spring. However, when the front lid is relatively pushed up by the member on the deck side and swings upward and swings, the front portion of the main body case may float up from the upper surface of the holder along with it. As described above, in the incompletely loaded state in which the front part of the case is lifted, the tape is pulled out obliquely from the tape outlet, so that the tape cannot be correctly run on the tape running path set on the deck side. Further, there is a possibility that the lower edge of the tape is rubbed at the tape draw-out port and bent.

Therefore, an object of the present invention is to prevent the main body case from being lifted up when the front lid is opened so that it can always be properly loaded in the holder of the tape deck, and the tape deck of the tape deck caused by a defective loading can be prevented. The purpose is to obtain a tape cartridge that can effectively prevent malfunction and damage to the tape.

[0005]

As shown in FIG. 1, a tape cartridge according to the present invention has tape outlets 4 on the front left and right sides of a main body case 1, and between tape guides 5 provided on the left and right tape outlets 4. In the tape cartridge in which the tape 2 is guided out, and the front lid 7 for protecting the tape 2 is supported by the main body case 1 so as to swing upward and is closed and biased by the spring 12, the holder on the tape deck side. It is a requirement that an engaging portion 25 that engages with a hooking piece 21 provided in a protruding manner on the main body case 1 to prevent the main body case 1 from being lifted up is provided on the peripheral wall front portion 24 of the main body case 1. Here, body case 1
The peripheral wall front part 24 means the range from the front ends of the case bottom wall and the case side wall to the front-rear center.

Specifically, the hooking piece 21 also serves as a stopper for defining the insertion limit of the main body case 1 into the holder 20, and when not in use, the bottom walls 24a of the left and right tape pull-out ports 4 have front covers. 7 is exposed to the front of the case from notches 26 formed on both sides of the lower end of the front wall 7a, and an engaging portion 25 is formed on at least one front end surface of the bottom wall 24a.

[0007]

[Function] A tape cartridge holder 2 for a tape deck
When it is inserted and loaded in 0, the main body case 1 is positioned with respect to the holder 20, and the engaging portion 25 provided on the front portion 24 of the peripheral wall engages with the hooking piece 21 on the holder 20 side until the insertion limit position is reached. . That is, the engaging portion 25 engages with the hooking piece 21 prior to the completion of the upward opening operation of the front lid 7.

[0008]

According to the present invention, when the tape cartridge is loaded in the holder 20, the engaging portion 25 provided on the front portion 24 of the peripheral wall of the main body case 1 is provided with the engaging piece 2 of the holder 20.
Since the front cover 7 is engaged with the front cover 7 when the front cover 7 is opened upward against the spring 12,
It is possible to prevent the holder 20 from floating above the plate surface. Therefore, the tape cartridge can be always loaded into the holder 20 in an appropriate posture, and the state can be maintained, and the malfunction of the tape deck caused by the lifting of the main body case 1 and the scratch on the tape 2 can be removed. The reliability of the tape cartridge during use can be improved.

[0009]

【Example】

(First Embodiment) FIGS. 1 to 4 show a first embodiment in which the present invention is applied to an 8 mm video tape cartridge.
In FIG. 2, reference numeral 1 is a main body case formed by joining upper and lower plastic cases in a lid-fitting manner. On the left and right sides of the inside of the main body case 1, there are tape reels 3 on which the tape 2 is wound. The tape 2 drawn out from the one tape reel 3 to the front surface of the case is wound on the other tape reel 3 via the tape guides 5 and 5 provided at the left and right tape outlets 4 and 4 on the front surface of the case. On the front surface of the main body case 1, a tape loading pocket 6 is formed between the left and right tape outlets 4 and 4. The main body case 1 is provided with a front lid 7 for protecting the tape, which covers the front surface and the upper surface of the pocket 6 when not in use, and the front lid 7 is pivotally supported with respect to the main body case 1 so as to be openable / closable. . Reference numeral 8 indicates an insertion port for the lamp L for detecting the tape end, and 9 indicates an optical path for detection by the lamp L.

As shown in FIG. 3, the front lid 7 has a front wall 7a and left and right side walls 7b, 7b, and is pivotally connected to the main body case 1 via a shaft 11 provided on the inner surface of each side wall 7b. I am doing it.
The front lid 7 can swing upwardly about the shaft 11,
It is biased at its own discretion by a torsion coil type spring 12 that is externally fitted and attached. A back lid 13 is attached to the inner surface of the front lid 7. The back lid 13 covers the rear surface side of the front lead-out portion of the tape 2 when not in use, and is interlocked with the upward swing of the front lid 7 in the pocket 6. To the upper surface of the main body case 1.

In the unused state, the front lid 7 is restrained by a lock pawl 14 attached to the main body case 1 so as not to swing, and the lock pawl 14 swings rearward of the case against its biasing spring 15. The opening operation can be performed only in the state shown in FIG.
The lock claw 14 engages with the protrusion 16 provided on the inner surface of the left side wall 7b. In FIG. 3, reference numeral 17 is an optical path window and 18 is a lock claw 1.
4 is a release operation member.

The tape cartridge is loaded into the holder 20 on the side of the tape deck with the front lid 7 being the starting end and is positioned by the holder 20. As shown in FIG. 1, the holder 20 is provided with a pair of left and right hooking pieces 21 on the plate surface. Each of the hooking pieces 21, 21 also functions as a stopper that defines the insertion limit of the tape cartridge,
The standing wall 22 standing upright from the plate surface of the holder 20 and the hanging wall 23 bent backward from the upper end of the standing wall 22 have an inverted L shape.
Form in a letter shape.

With the tape cartridge loaded in the holder 20, the holder 20 is located at the rear of the upper surface of the main body case 1.
It is pressed and held by a spring provided on the front lid 7
Cannot be pressed and held by a spring, etc. Therefore, when an upward external force is applied to the front part of the main body case 1, the front part of the case easily floats up from the holder 20 with the rear edge of the bottom surface as a fulcrum. In particular, when the front lid 7 is relatively pushed up by an operating member (not shown) to increase the spring force of the spring 12, the front portion of the case is lifted.

In order to prevent such lifting, an engaging portion 25 is provided at the front portion 24 of the peripheral wall of the main body case 1 corresponding to the hooking piece 21, and this is engaged with the hooking piece 21. More specifically, as shown in FIGS. 3 and 4, the front end of the bottom wall 24a of the tape outlet 4 is utilized to form a stepped engagement portion 25 in the upper corner of the front portion. In the loaded state, the hooking wall 23 of the hooking piece 21 enters the engaging portion 25 to prevent the main body case 1 from moving upward, and together defines the insertion limit. As shown in FIG. 3, notches 26 are provided on both sides of the lower end of the front wall 7a of the front lid 7 so as to correspond to the bottom wall 24a. Therefore, even if the front lid 7 is closed, the hooking piece 21 can be engaged with the engaging portion 25 without hindrance, and the body case 1 is engaged and held by the holder 20 prior to the opening operation of the front lid 7.

The front lid 7 has its side wall 7b near the front end pushed up by an operation member on the deck side. Therefore, if the engaging portion 25 is provided on the bottom wall 24a of the tape outlet 4 as described above, the pushing force can be received at a position close to the operating member. Compared with the above, it is possible to effectively prevent the main body case 1 from rising.

(Second Embodiment) FIG. 5 shows a second embodiment of the present invention in which the formation position of the engaging portion 25 is changed, and the side end portion of the bottom wall 24a of the tape outlet 4, that is, the front lid. The engaging portion 25 is provided on the side of the No. 7 covered with the side wall 7b. In this case, by using the clearance E for the release operation member between the side wall 7b and the bottom wall 24a, the hooking piece 21 can be engaged with the engaging portion 25 while the front lid 7 is closed.

(Third Embodiment) In the embodiment shown in FIG. 3, the optical path window 17 is opened adjacent to the front part of the case of the lock claw 14, and in this case, the optical path window 17 is covered with the front cover when not in use. It can be covered with a side wall 7b of 7. However, as shown in FIG. 6, when the optical path window 17 is provided behind the lock claw 14 in the case, it is difficult to shield the front cover 7 and dust easily enters the case through the optical path window 17. To avoid this situation, lock claw 14
And an integrally formed shielding plate 27 for closing the optical path window 17,
As shown by an imaginary line, the optical path window 17 may be opened only when the lock claw 14 is unlocked.
The shielding plate 27 is located inside the main body case 1 and covers the optical path window 17 from the inside.

(Fourth Embodiment) FIG. 7 shows a fourth embodiment of the present invention in which the formation position of the engaging portion 25 is changed. With this, the side wall 24b of the main body case 1 has a groove-like engaging portion 25 that is long in the front and rear direction.
And a guide groove 29 continuous with the engaging portion is formed in the side wall 7b of the front lid 7.

(Other Embodiments) In addition to the above, the engaging portion 25 may be provided anywhere on the front portion 24 of the peripheral wall of the main body case 1. For example, the engaging portion 25 may be provided at a portion covered by the front wall 7a or the side wall 7b of the front lid 7. In this case, the hooking piece 21 is supported by the holder 20 so as to be movable back and forth or left and right, and is biased to move toward the main body case 1 by a spring so that the front lid 7 starts to open at the same time. The stop piece 21 can be engaged with the engagement portion 25. The latching piece 21 and the engaging portion 25 are in contact with each other and the main body case 1
As long as it is a structure that prevents the contact surface of both of them from rising, a modified mode such as inclining the contact surfaces of the both or forming the contact surfaces with a tertiary plane can be adopted.

[Brief description of drawings]

FIG. 1 is a perspective view of a first embodiment.

FIG. 2 is a partially cutaway plan view of the first embodiment.

FIG. 3 is a first diagram for explaining an engagement state between a main body case and a holder.
It is a vertical side view of an example.

FIG. 4 is an A arrow oblique view in FIG.

FIG. 5 is a front view of a main part showing a second embodiment.

FIG. 6 is a side view showing a third embodiment.

FIG. 7 is a perspective view showing a fourth embodiment.

[Explanation of symbols]

 1 main body case 2 tape 4 tape outlet 5 tape guide 7 front lid 7a front wall 12 spring 20 holder 21 hooking piece 24 peripheral wall front 24a tape outlet bottom wall 25 engaging portion

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Nobuyuki Kaku, 292 Yoshida-cho, Totsuka-ku, Yokohama-shi, Kanagawa Inside the Hitachi Media Visual Media Research Institute (72) Hidekazu Takeda 292 Yoshida-cho, Totsuka-ku, Yokohama, Kanagawa Incorporated company Hitachi Ltd. Media Research Institute

Claims (2)

[Claims] 1. A front lid for protecting a tape 2 having tape outlets 4 on the front left and right sides of a main body case 1 and guiding a tape 2 between tape guides 5 provided on the left and right tape outlets 4, respectively. In the tape cartridge 7, which is supported by the main body case 1 so as to swing upward and is closed and urged by the spring 12, the main body is engaged with a hooking piece 21 protruding from the holder 20 on the tape deck side. The engaging portion 25 that prevents the case 1 from rising is
A tape cartridge provided on the front part 24 of the peripheral wall of the main body case 1. 2. The hooking piece 21 also serves as a stopper that defines the insertion limit of the main body case 1 into the holder 20, and the bottom wall 24 of the left and right tape pull-out ports 4 in the unused state.
a is exposed to the front of the case from notches 26 formed on both sides of the lower end of the front wall 7a of the front lid 7, and an engaging portion 25 is formed on at least one front end surface of the bottom wall 24a. The tape cartridge according to claim 1, wherein