JPH0146942B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a tape cartridge having a front cover for protecting the tape on the front surface of the main body case.

In this type of tape cartridge, a notch is provided at the lower end of the front surface of the front cover, and the positioning regulating member on the magnetic recording device comes into contact with a part of the main body case exposed through the notch. This regulates the depth of insertion of the tape cartridge.

The problem with this is that as the tape cartridge is frequently inserted into and removed from the magnetic recording device, the part of the main body case exposed in the notch is easily damaged by contact with the positioning regulating member, and this damage is visible and unsightly. Moreover, dust enters the inside of the front cover through the notch and adheres to the tape.

The present invention has been proposed to solve these problems, and the details thereof will now be explained based on a videotape cartridge shown in the drawings.

In FIGS. 1 to 3, 1 is a main body case. The main body case 1 is made by screwing together upper and lower plastic cases 1a and 1b with their lids mating.
Tape reel 3 on which tape 2 is wound inside left and right,
It has 3. Tape reels 3 and 3 are main body case 1
The left and right drive shaft insertion holes 5, 5 are transparently provided in the bottom wall 4 of the
The center of rotation is biased downward by a plate spring 7 fixed to the inner surface of the upper wall 6 of the main body case 1, and when the main body case 1 is loaded into the magnetic recording device, the drive shaft on the magnetic recording device side is fitted into the hub hole 8 of each tape reel 3 through each insertion hole 5, 5. Tape guide members 9, 9 are installed on the front left and right sides of the main body case 1.
The tape 2 is led out from one tape reel 3 to the front of the case via these guide members 9, 9, and wound onto the other tape reel 3.

A tape protective front cover 10 for closing the front of the main body case 1 is pivotally attached to the main body case 1 so that it can be opened and closed.

The front lid 10 includes a front plate 11 that closes the front surface of the main body case 1 between the left and right sides, and side pieces 12, 12 extending rearward from both left and right ends of the front plate 11.
Pivot shafts 1 protruding from the inner surfaces of the side pieces 12, 12 to face each other.
3, 13, the left and right side pieces 12, 12 are externally fitted into the recessed outer surfaces 16, 16 at the front ends of the left and right side walls 15, 15 of the main body case 1, and the pivots 13, 13 are fitted onto the case side walls. The main body case 1 is fitted into the pivot hole of the handle and pivoted, and can be rotated around this pivot 13 between a closed position and an upwardly opened position, and is attached to the pivot 13 on the left side in the figure. It is rotatably biased to the closed position by a torsion spring 17. When the tape cartridge is not in use, the front cover 10
The front cover 10 is closed to cover and protect the outer front surface of the tape 2, and when the tape cartridge is loaded into the magnetic recording device, the front cover 10 opens and magnetic recording is carried out in a pocket 19 recessed in the front of the main body case 1. The tape loading pin on the device side pushes in and tape 2
Pull out the case toward the front.

A means for locking the front lid 10 in the closed position when the tape cartridge is not in use is assembled in the gap 20 between the recessed outer surface portion 16 at the front end of the left side wall 15 of the main body case 1 and the left side piece 12 of the front lid 10. ing.

5 and 6 illustrate this closing locking means, in which the front end recessed outer surface portion 16 of the left side wall 15 of the case is inclined toward the inside of the case as it goes forward in plan view, and the gap 20 is is formed in a shape that widens forward with a narrow inner back side, and a locking tool 21 is disposed within this gap 20.

The illustrated locking tool 21 has a horizontal shaft 22 protruding from its front and rear central portions. The tip engaging portion 24 of the locking tool 21 swings up and down using the shaft 22 as a fulcrum. On the inside of the front plate 11 of the front cover 10, an L-shaped engaged piece 26 is provided protruding downward at a position facing the gap 20 near the left end, and one end of the spring 17 is connected to the rear end of the locking tool 21. The lock member 21 is pressed and biased so that its distal end engaging portion 24 engages the engaged piece 26 from below. In such a case, the tip engaging portion 24 of the locking tool 21 always engages with the engaged piece 26 of the front lid 10 which is in the closed position when the tape cartridge is not in use, and the front lid 10 opens upward around the pivot shaft 13. Prevent it from rotating. Only when the tape cartridge is pushed and loaded into the magnetic recording device in its normal position, it is relatively guided from the front by the lock release member 27 on the magnetic recording device side that also serves to prevent erroneous loading. The device enters the gap 20 through the cutout opening 29 and presses the pressed portion 30 extending downward from the rear end of the locking device 21. Now the end engaging portion 2 of the locking tool 21
4 is pushed downward against the spring 17 and disengaged from the engaged piece 26, and the closed lid lock state of the front lid 10 is released.

The gap 20 is wide at the front end and narrows toward the rear, so that even if the tape cartridge is loaded in the magnetic recording device with the left and right positions shifted, the lock release member 27 can close the gap 20.
The pressed portion 30 of the locking tool 21 is smoothly guided by the
Correct contact action. Furthermore, when the tape cartridge is pushed into the magnetic recording device in the wrong orientation (front-to-back or upside-down), the lock release member 27 does not fit into the opening 29, so the lock release member 27 is inserted into the magnetic recording device. Prevents incorrect loading of the tape cartridge by contacting and interfering with the part.

Since the inner surface 16a of the front end recessed outer surface portion 16 of the left side wall 15 of the case is inclined toward the inside of the case as it goes forward in plan view, the tape slack occurs inside the left tape guide member 9. When the tape 2 comes into contact with the inner surface 16a, the tape 2 is actively drawn inward to the case, and the tape 2
prevents it from coming loose toward the front of the case.

Now, as shown in FIGS. 4 and 7, the lower end of the front plate 11 of the front cover 10 is provided with notches 31, 31 at the left end and right end. The pieces 32, 32 are formed to protrude so as to face the respective notches 31, 31 of the front lid 10 in the closed position. The amount of protrusion of each of the protrusions 32 is set so that the abutting surface 33 of the tip thereof is in the middle of the wall thickness of the front plate 11.

If this happens, close the tape cartridge with the front cover 10.
When it is pushed into the magnetic recording device in the closed position and loaded, the positioning regulating member on the magnetic recording device side will close to the front cover 1.
The tip abutting surface 33 of the protruding piece 32 facing the notch 31 of No. 0 is brought into contact to regulate the pushing depth of the tape cartridge. At this time, as shown in the example shown, the projecting piece 3
If the positioning regulating members 2 are provided near both the left and right ends so that the positioning regulating members come into contact with each other at two points, the pushing depth can be stably regulated.

As explained above, in the present invention, the protruding piece 32 with which the positioning regulating member of the magnetic recording device comes into contact has its tip end abutting surface 33 located in the notch 31 of the front cover 10 at the midpoint of the wall thickness of the front plate 11. A protrusion was formed so that it was located at Therefore, even if the abutting surface 33 of the protruding piece 32 is damaged due to contact with the positioning regulating member on the magnetic recording device side during use, the abutting surface 33 is located inside the front surface of the front plate 11. It can be effectively prevented from becoming difficult to see from the outside and from becoming unsightly in appearance, and since it does not protrude further forward than the front plate 11, it will not be cut or damaged by contact with other objects. Furthermore, if the abutment surface 33 of the protruding piece 32 is located inside the inner surface of the front plate 32, dust will be sucked into the inside of the front plate 11 through the gap between the protruding piece 32 and the notch 31 when not in use. Although there is a large risk that the particles may enter the tape 2 and adhere to the tape 2, it has the advantage that such concerns can be prevented.

[Brief explanation of drawings]

The drawings show a tape cartridge according to the present invention; FIG. 1 is a perspective view of the overall appearance, FIG. 2 is a partially cutaway vertical side view, FIG. 3 is a plan view showing the internal structure, and FIG. 3 is a sectional view taken along the line AA, FIG. 5 is a partially enlarged plan view showing the closing lock means of the front cover, FIG. 6 is a sectional view taken along the line BB in FIG. 5, and FIG. 7 is a sectional view of the front cover. FIG. 3 is a partial perspective view showing the relationship between a notch formed at the lower end of the front plate of the main body case and a protrusion provided at the front end of the bottom wall of the main body case. DESCRIPTION OF SYMBOLS 1...Main case, 2...Tape, 3...Tape reel, 4...Bottom wall of main body case, 10...Front cover, 11...Front plate of front cover, 31...Notch, 3
2... Projection piece, 33... Tip abutment surface.

Claims (1)

[Claims] 1 Front lid 1 that closes the front of this to the main case 1
0 is attached so that it can be opened and closed freely, has a notch 31 at the lower end of the front plate 11 of the front cover 10, and has a notch 31 at the lower end of the front plate 11 of the front lid 10.
A protruding piece 32, which the positioning regulating member on the magnetic recording device side comes into contact with, is formed protruding from the front edge of the holder so as to face the notch 31. A tape cartridge characterized in that the tape cartridge is set to be located in the middle of the wall thickness of a front plate 11 of a lid 10.