JPS6325589Y2 - - Google Patents

Description

[Detailed description of the invention] This invention relates to a magnetic tape cartridge having a structure in which a front cover for protecting the tape is rotatably supported in front of the main case so that the front cover can be opened and closed, and the mounting structure of this front cover has been improved. It is something that

In other words, in a video magnetic tape cartridge, a front cover for protecting the tape is pivoted to the front of the main body case so that it can be opened and closed, and when in use, the front cover opens upward and the magnetic tape can be pulled out from the front of the case to the front of the case. When not in use, the front cover closes to cover and protect the outside of the front of the magnetic tape.

Conventionally, the front cover generally has side pieces connected to the left and right sides of the front plate, and these left and right side pieces are rotatably supported on the left and right side walls of the main body case. Specifically, the front end portions of the left and right side walls of the main body case are recessed, and the left and right side pieces of the front cover are positioned and pivoted outside of these recessed portions, and the front cover is elastically pressed into the closed lid position by a spring member. It is equipped with a means for locking the lid in the closed position. When the front lid is closed, the lower end of the front plate of the front lid comes into contact with the tip end surface of the front edge portion protruding from the lower end of the front surface of the main case.

Therefore, there is a possibility that the left and right side pieces of the front cover and the lower edge of the front plate will come into contact with other objects and apply upward external force to the front cover, and in the worst case, the front cover closing locking means may be damaged. Damaged. If there was no cover locking means, there was a risk that the front cover would open and the magnetic tape would be damaged. Particularly, when trying to downsize the magnetic tape cartridge, it is possible to omit the closure locking means, but in such a case, it becomes even more problematic.

This invention focuses on this fact and attempts to prevent other objects from getting caught on the left and right side pieces of the front cover and the lower edge of the front panel when not in use, and preventing the front cover from opening unexpectedly. .

The details will be explained below with reference to the video magnetic tape cartridge shown in the drawings.

In FIGS. 1 and 2, 1 is a main case formed by screwing together upper and lower plastic cases 1a and 1b in a lid-like manner, and a magnetic tape 2 is wound around the left and right inside of the main case 1. Reels 3, 3 are rotatably mounted, and the magnetic tape 2 is led out from one reel 3 to the outside of the front surface of the main body case 1 and wound onto the other reel 3.

4 is a front cover for protecting the tape. A top wall 6 extends inward from the upper end of a flat front plate 5 that covers the front of the case between the left and right sides, and side pieces 7 extend inward from the left and right ends of the front plate 5, respectively. It is a plastic molded product with round shafts 9, 9 protruding from the outer surfaces of the left and right side pieces 7, 7, respectively.
The front cover 4 is rotatably supported at the front of the main body case 1 in a manner described later, so that it can be opened and closed freely between a closed position and an upwardly opened position, and when not in use, the front cover is closed and the magnetic tape 2 is It is for protection.

The front of the main body case 1 is formed with notches 10 and 11 into which the tape loading pin on the video deck side is inserted, a notch 12 into which the pinch roller is inserted, and a notch 13 into which the fixing lever for opening the front cover is inserted, and each notch 10- The lower front edge between 11, 11-12, and 12-13, that is, the front edge of the lower case 1b, is shaped to protrude forward. Reference numeral 14 indicates its protruding front edge portion.

Now, in FIGS. 3 to 7, the pivot structure of the front lid 4 is shown, and the upper surface of the front end of the upper case 1a is on the stepped surface 15 except for the locations where the notches 10, 11, 12, and 13 are present. An engagement hole 16 is formed in the left end of the step-down surface 15, and pivot holes 17 are formed in the inner surface of the upper case 1a at the front ends of the left and right side walls of the main body case 1, respectively. On the other hand, the front lid 4
A projection 19 is provided on the inner surface of the upper wall 6 at a position near the left end. In this way, the left and right pieces 7, 7 of the front cover 4 are guided and fitted to the inner surfaces of the left and right side walls of the main body case 1, and the round shafts 9, 9 are rotatably fitted into the respective pivot holes 17, 17. The front lid 4 is supported by the spring member 20 so that the front plate 5 closes the front surface of the main body case 1 in a vertical position.

The spring member 20 is made of a torsion spring, and has an intermediate loop portion 20a fitted onto the round shaft 9 on the left side in the figure, one end portion 20b of which is locked to the upper wall 6 of the front cover 4, and the other end portion 20c It is assumed that the upper case 1a is locked.

In such a case, when the front cover 4 is elastically biased in the closed position by the spring member 20, the top wall 6 of the front cover 4 overlaps with the front end stepped surface 15 of the upper case 1a, and the upper surface of the top wall 6 overlaps with the front end stepped surface 15 of the upper case 1a. The upper surface of the upper case 1a becomes flush with the projection 19 on the upper wall side.
is fitted into the engagement hole 16 on the step-down surface 15, and the front cover 4 is fitted with the engagement and the biasing force of the spring member 20.
prevents it from opening upward unexpectedly. Further, in the closed state of the front cover 4, the lower end surface 5a of the front plate 5 is located on the upper surface of the protruding front edge portion 14 of the lower case 1b, and the outer surface of the front plate 5 is
It is regulated to abut so that it is flush with the tip end surface 14a of No. 4 or located on the inside of the case.

Incidentally, when the magnetic tape cartridge of the present invention is pushed into the mounting base of the video deck and pushed down, the fixing lever on the video deck side enters the notch 13 and comes into contact with the lower end surface 5a of the front plate of the front cover 4. However, the engagement between the protrusion 19 and the engagement hole 16 is released, the front cover 4 opens upward against the spring member 20, and the magnetic tape 2 enters a standby state in which it can be drawn forward.

Although the illustrated example is as described above, the invention is not limited to this, and the means for locking the front cover 4 in the closed position may be replaced by the above-mentioned fitting between the protrusion 19 and the engagement hole 16. For example, as shown in FIG. 8, a protrusion 21 is provided on the outer surface of the side piece 7 of the front cover 4 so that the tip of the protrusion 21 frictionally engages with the opposing inner wall surface of the main body case. It is also possible that the device is not equipped with such a locking means.

According to the present invention as described above, the front cover 4 is housed in the front end of the main body case 1, and the left and right side pieces 7, 7 of the front cover 4 and the lower end surface 5a of the front plate 5 are connected to other objects. Since the front cover 4 is prevented from being caught, it is possible to effectively prevent the front cover 4 from opening unexpectedly when not in use. Therefore, when trying to downsize the magnetic tape cartridge itself, the present invention is extremely useful in cases where the closing locking means for the front cover 4 cannot be made complete or must be omitted due to space constraints. be.

[Brief explanation of the drawing]

FIG. 1 is an external perspective view of a magnetic tape cartridge according to the present invention, and FIG. 2 is a partially cutaway plan view thereof. Figure 3 is a sectional view taken along line A-A in Figure 2;
Fig. 4 is a plan view of the main part, Fig. 5 is a sectional view taken along line B-B in Fig. 4, and Fig. 6 is a C-C in Fig. 4.
A line sectional view and FIG. 7 are perspective views showing the locking means of the front cover. FIG. 8 is a partially longitudinal sectional front view of the main part showing another embodiment of the present invention. 1...Main case, 1a...Upper case, 1b...
...lower case, 2...magnetic tape, 3...tape reel, 4...front cover, 5...front plate of front cover, 6...
Top wall of front lid, 7... Left and right side pieces of front lid, 9...
Round shaft, 10, 11, 12, 13...notch, 14...
...Protruding front edge portion, 15... Stepped surface, 16...
Engagement hole, 17... Pivot hole, 19... Protrusion, 20...
...Spring member.

Claims (1)

[Scope of utility model registration request] The main case 1 is equipped with rotatable tape reels 3, 3 on which the magnetic tape 2 is wound inside left and right, and a front lid 4 is opened and closed to cover and protect the outside of the front surface of the magnetic tape 2 led out to the front of the main case 1. In a magnetic tape cartridge which is rotatably supported and whose front cover 4 is elastically biased into a closed position by a spring member 20, the front cover 4 has side pieces 7, 7 on the left and right sides of the front plate 5. The left and right side pieces 7, 7 are fitted to the inner surfaces of the front ends of the left and right side walls of the main body case 1, respectively, and are rotatably supported, so that the front cover 4 can be closed. At the same time, the lower end surface 5a of the front plate 5 is located on the upper surface of the front edge portion 14 protruding from the lower end of the front surface of the main body case 1, and the outer surface of the front plate 5 is located more inward than the tip surface 14a of the protruding front edge portion 14. A magnetic tape cartridge characterized by being positioned on one side.