JPS6319952B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention is a tape cassette that is most suitable for application to a recording/reproducing apparatus such as a video tape recorder, and is particularly applicable to a tape cassette that is suitable for application to a recording/reproducing apparatus such as a video tape recorder. The present invention relates to a tape cassette in which the front side and the rear side of the passed tape are covered by a front cover and a rear cover.

[Summary of the invention]

The present invention covers the front side of the tape passed along the front opening of the cassette casing with a front cover rotatably attached to the cassette casing, and
The rear side of the tape is configured to be covered by a rear lid rotatably attached to the front lid, and then a pair of fulcrum pins provided on the lid are connected to pins of a pair of protrusions provided on the front lid. In a tape cassette in which the back cover is rotatably supported on the front cover by being inserted into the insertion hole, the back cover is attached to the front cover by providing a tapered portion on the fulcrum pin or the protrusion. It is designed to be extremely easy to install as well as to remove.

[Conventional technology]

Conventional tape cassettes for video tape recorders of this type are constructed as shown in FIGS. 5 to 10.

First, as shown in FIG. 5, a cassette housing 3 composed of upper and lower halves 1 and 2, a front cover 4 and a rear cover 5 are each molded from synthetic resin. A magnetic tape 8 wound around a pair of left and right reels 6 and 7 is housed in the upper and lower halves 1 and 2, and these upper and lower halves 1 and 2 are fitted together from above and below with a plurality of screws 9. The cassette housing 3 is constructed by joining them together. A front opening 10 is provided on the front surface of the cassette housing 3 over its entire length in the left and right direction, and a pair of tape guides integrally formed on the lower half 2 are located near both left and right ends of the front opening 10. 11, the magnetic tape 8 is passed along the front opening 10 as shown in FIGS. 6 and 8. Furthermore, a recess 12 is formed in the cassette housing 3 on the rear side of the front opening 10 inside the pair of tape guides 11, and this recess 12 is integrally molded into the upper and lower halves 1 and 2 together with both tape guides 11. It is separated from the inside of the cassette housing 3 by a partition wall 13 having a substantially U-shaped planar shape. Note that both the top and bottom of this recess 12 are open.

Next, the front cover 4 has a substantially U-shaped planar shape as shown in FIG. 5, and a pair of fulcrum pins 15 are integrally molded on the inside of both left and right ends 4a so as to have the same axis. There is. As shown in FIGS. 6 to 8, the front cover 4 connects its pair of fulcrum pins 15 to the left and right side walls of the cassette housing 3 in order to cover the front side of the magnetic tape 8 that is being passed along the front opening 10. 3a
The pin insertion hole 16 is inserted into a pair of pin insertion holes 16 provided on the front end side of the pin so as to be coaxial with each other.
This front cover 4 is attached to the cassette housing 3 so that it can rotate up and down about both fulcrum pins 15.

Next, as shown in FIG. 5, the rear lid 5 is integrally molded with an upper lid 17 along its upper edge, and a pair of fulcrum pins are provided at both left and right ends of the rear lid 5 and approximately at the center in the vertical direction. 18 are integrally molded with each other on the same axis. As shown in FIGS. 6 and 8, the rear cover 5 is disposed in a recess 12 parallel to the front cover 4 to cover the rear side of the magnetic tape 8 that is passed along the front opening 10. . The rear lid 5 has a pair of fulcrum pins 18 attached to a pair of protrusions 19 that are integrally molded near the left and right ends 4a on the back side of the front lid 4, as shown in FIGS. 5 and 8. It is inserted into the pin insertion hole 20 from the inside of the pair of protrusions 19 and is rotatably supported. installed on. Note that the upper lid 17 is the sixth
It is arranged to cover the upper surface of the recess 12 as shown in the drawings and FIG.

Next, as shown in FIGS. 5 and 8, the left and right end portions 13a of the partition wall 13 are opposed in parallel from the left and right directions, and the opposing surfaces of the left and right end portions 13a are gently bent approximately in an S-shape. A pair of guide grooves 2
1 is provided. A pair of protrusions 22 are integrally molded on the rear surface of both left and right ends of the rear cover 5 below both fulcrum pins 18, and a pair of protrusions 22 are integrally molded on the outside of both protrusions 22 so as to be coaxial with each other. A guided pin 23 is loosely fitted into both guide grooves 21. Further, as shown in FIGS. 6 and 7, a torsion coil spring 25 is wound around the outer periphery of one of the fulcrum pins 15 between one end 4a of the front cover 4 and one side wall 3a of the cassette housing 3. Both front and rear ends 25a, 25b of the torsion coil spring 25 are engaged with protrusions 26, 27 integrally formed on the end 4a and the side wall 3a, respectively. Therefore, this torsion coil spring 25
As a result, the front lid 4 is urged to rotate in the direction of the arrow a in FIG. 7, which is the lid closing direction. Further, as shown in FIG. 7, a lock lever 28 is attached to one side wall 3a of the cassette housing 3 via a fulcrum pin 29 formed integrally with the lock lever 28 so as to be rotatable back and forth. The lock lever 28 is rotated in the direction of arrow b by a spring 30 attached to the side wall 3a, and is engaged with a protrusion 31 integrally formed inside one end 4a of the front cover 4. The front cover 4 is configured to be locked in the closed position.

According to the tape cassette constructed as described above, when the cassette is not in use, the front lid 4 is locked in the closed state by the lock lever 28 as shown by the solid line in FIG. In this lid closed state, the magnetic tape 8 passing along the front opening 10 is covered from the front and back by the front lid 4 and the rear lid 5, as shown by the solid line in FIG. It is a so-called completely sealed tape cassette.

Next, when the tape cassette is installed in the video tape recorder, the lock lever 28 is rotated in the direction of arrow b' by the lock release member 33 against the spring 30, as shown by the imaginary line in FIG. , front lid 4
When the lock is released, the front lid 4 is pushed up by the lid opening member 34, and the front lid 4 is pushed up approximately 90 degrees in the lid opening direction, which is the direction of arrow a', against the torsion coil spring 25. The front opening 10 is opened by being rotated by . The front cover 4 is then rotated about 90 degrees in the direction of arrow a' from the closed position shown by solid lines in FIG. 8 to the open position shown by phantom lines about both fulcrum pins 15. Therefore, since both fulcrum pins 18 of the rear lid 5 are also rotated in the same direction and at the same angle, the rear lid 5 also rotates in the same angle as the front lid 4.
At the same time, the cover is rotated from the closed position shown by the solid line in FIG. 8 to the open position shown by the phantom line. At this time, by rotating both fulcrum pins 18 in the direction of arrow a', both guided pins 23 are aligned with both guide grooves 2.
1 and moved in the direction of arrow c, and by the guiding action of both guide grooves 21, the rear cover 5 moves in the direction of arrow d with respect to the front cover 4 around both fulcrum pins 18. The lid is opened in the direction of arrow a' while being rotated in a direction to move away from the rear. When the rear lid 5 is opened, the guided pin 23 is moved in the direction of the arrow c in the guide groove 21 so as to be drawn toward the side surface 36 of the guide groove 21 on the side of both fulcrum pins 18. When the lid is closed, the front lid 4 is rotated in the direction of the arrow a in FIG.
While being rotated in the direction d', it is moved back in the direction of the arrow a,
The guided pin 23 also moves in the direction of the arrow c' within the guide groove 21 and moves to the guide groove 21 shown by the solid line in FIG.
It is returned to the lower end portion 21a of.

[Problem that the invention seeks to solve]

However, with the conventional tape cassette mentioned above,
As shown in the direction of arrow e in FIG. 9, the rear cover 5 is inserted between the pair of protrusions 19 of the front cover 4 from the rear side to attach it. In this case, conventionally, as shown in FIG. After inserting one of the fulcrum pins 18 diagonally into the pin insertion hole 20 of one of the projecting pieces 19 from the direction of the arrow f as shown in the line, use the one of the fulcrum pins 18 as a rotation fulcrum and move the rear cover 5 in the direction of the arrow. Rotate in the g direction, and snap the other fulcrum pin 18 into the pin insertion hole 20 of the other protrusion 19 while biasing the protrusion 19 in the direction of the arrow h as shown by the imaginary line against elasticity. It was designed to be installed by pushing it in.

Therefore, in the past, it has been relatively easy to attach the rear cover 5 to the front cover 4, but on the other hand, the task of removing the rear cover 5 from the front cover 4 is not as easy as the above-mentioned installation process. However, it was very troublesome to remove the lid 5 afterwards.

Therefore, the present invention makes it possible to extremely easily attach and remove the rear cover from the front cover.

[Means for solving problems]

The present invention provides the tape cassette described above.
The fulcrum pin or the projecting piece is provided with a tapered portion.

[Effect]

According to the present invention, when attaching the rear cover to the front cover, the fulcrum pin can be easily pushed into the pin insertion hole of the projecting piece against elasticity using the tapered portion. Furthermore, when the rear cover is removed from the front cover, the fulcrum pin can be easily pulled out of the pin insertion hole of the projecting piece by using the tapered portion against elasticity.

〔Example〕

An embodiment in which the present invention is applied to a tape cassette for a video tape recorder will be described below with reference to FIGS. 1 to 4. The overall structure of the tape cassette of this embodiment is almost the same as that of the conventional example shown in FIGS. 5 to 10, and the main parts thereof will be explained in this embodiment.
The same reference numerals are given to the same structural parts as in the conventional example, and the explanation thereof will be omitted.

First, FIGS. 1 and 2 show the first embodiment, and in this case, the pair of left and right fulcrum pins 18a, 18b of the rear cover 5 are shown in FIG. 9 on opposite sides in the direction of arrow e. A pair of tapered portions 40a and 40b are provided on the side surfaces of the holder, which are inclined in opposite directions.

In this case, first, the rear lid 5 is connected to the front lid 4.
When installing the fulcrum pin 18a, as shown by the imaginary line in FIG. One tapered portion 4 provided on the other fulcrum pin 18b side by rotating the rear cover 5 in the direction of the arrow g as a rotation fulcrum.
By pressing 0a against the outer surface of the tip of the other protruding piece 19b, the other protruding piece 19b is moved in the direction of the arrow h against elasticity as shown by the imaginary line, using the guiding action of the one tapered portion 40a. 1, the other fulcrum pin 18b can be easily pushed into the pin insertion hole 20b of the other projecting piece 19b with a snap.

Next, when removing the rear cover 5 from the front cover 4, the second
As shown by the solid line in the figure, the rear cover 5 is rotated in the direction of arrow g' using the other fulcrum pin 18b side as a rotation fulcrum, and the other tapered portion 40b provided on the one fulcrum pin 18a side is rotated. By pressing against the inner surface of the tip of one protruding piece 19a, the guiding action of the other tapered part 40b is used to move one protruding piece 19a in the direction of arrow h' against elasticity as shown by the imaginary line. While biasing, one fulcrum pin 18a can be easily pulled out of the pin insertion hole 20a of one projecting piece 19a. In addition, after this, the rear lid 5
The other fulcrum pin 18b can be pulled out of the pin insertion hole 20b of the other protruding piece 19b by pulling it out diagonally in the direction of arrow f'.

Next, FIG. 3 shows a second embodiment, in which a pair of tapered portions 40a are formed on the outer and inner surfaces of the tips of the pair of projecting pieces 19a and 19b, respectively, and are inclined in opposite directions. , 40b, and when attaching the rear cover 5 to the front cover 4, the other fulcrum pin 18b is connected to one tapered portion 4 as described above.
0a, the other fulcrum pin 18b can be easily inserted into the pin insertion hole 20b of the other protruding piece 19b with a snap, as described above. Further, when removing the rear cover 5 from the front cover 4, by pressing one fulcrum pin 18a against the other tapered portion 40b in the same manner as described above, the one fulcrum pin 18a is moved to the one protruding piece 19 in the same manner as described above.
It can be easily removed from the pin insertion hole 20a of a.

Next, FIG. 4 shows a third embodiment, in which one tapered portion 40a is provided on the outer surface of the tip of the other projecting piece 19b, and one fulcrum pin 18 is provided with one tapered portion 40a.
The other tapered portion 40b is provided on the side surface of the rear lid 4, and when the rear lid 5 is attached to the front lid 4, the other fulcrum pin 18b is pressed against the one tapered portion 40a as in the second embodiment. Then, the other fulcrum pin 18b can be easily inserted into the pin insertion hole 20b of the other protruding piece 19b. Also, when removing the rear cover 5 from the front cover 4,
As in the first embodiment, by pressing the other tapered portion 40b of one fulcrum pin 18a against the inner surface of the tip of one protrusion 19a, one fulcrum pin 18
a can be snapped out of the pin insertion hole 20a of one of the projecting pieces 19a.

Although the embodiments of the present invention have been described above, the present invention is not limited to the embodiments, and various effective changes can be made based on the technical idea of the present invention.

For example, in the embodiment, a pair of fulcrum pins 18a, 1
8b, or a pair of projecting pieces 19
A pair of tapered portions 40a, 40b are provided on the outer and inner surfaces of the tips of the fulcrum pins 18a and 19b, or on the side surface of one of the fulcrum pins 18a and the outer surface of the tip of the other protruding piece 19b, respectively, inclining in opposite directions. , these tapered portions 40
A, 40b are appropriately combined, and a pair of fulcrum pins 18 are used to attach and detach the rear cover 5 to the front cover 4.
It may be possible to perform this from either side a or 18b.

The present invention is applicable to tape cassettes for various recording and reproducing devices other than video tape recorders and various other information processing devices.

〔Effect of the invention〕

As described above, in the present invention, since the fulcrum pin of the rear cover or the protruding piece of the front cover is provided with a tapered portion, the fulcrum pin can be easily pushed into the pin insertion hole of the protruding piece, and the fulcrum pin can be easily pushed into the pin insertion hole of the protruding piece. can be easily removed from the pin insertion hole of the protrusion. Therefore, not only can the rear cover be attached to the front cover, but also the removal of the rear cover from the front cover, which was conventionally very troublesome, can be done very easily, resulting in a very convenient product.

[Brief explanation of the drawing]

1 to 4 show an embodiment of a tape cassette for a video tape recorder to which the present invention is applied, and FIGS. 1 and 2 show how the rear cover is attached to the front cover in the first embodiment. 3 is a sectional view similar to FIG. 1 showing the second embodiment, and FIG. 4 is a sectional view similar to FIG. 1 showing the third embodiment. It is a diagram. Figure 5~
Fig. 10 shows a conventional example of a tape cassette for a video tape recorder, in which Fig. 5 is an exploded perspective view, Fig. 6 is a plan view of the same fully assembled state, and Fig. 7 is Fig. 6- Figure 8 is an enlarged cross-sectional view taken along the line from Figure 6, Figure 9 is an enlarged cross-sectional view of the main parts showing the direction in which the rear cover is attached to the front cover, and Figure 10 is the front cover. FIG. 9 is a cross-sectional view taken along the line of FIG. 9 for explaining how to attach the rear cover to the vehicle. Also, in the symbols used in the drawings, 3...
Cassette housing, 4...Front cover, 5...Rear cover, 6,7
... Reel, 8 ... Magnetic tape, 10 ... Front opening, 15 ... Fulcrum pin, 16 ... Pin insertion hole, 1
8a...one fulcrum pin, 18b...the other fulcrum pin, 19a...one protrusion, 19b...the other protrusion, 20a...one pin insertion hole, 20b...
Other pin insertion hole, 21... Guide groove, 23...
Guided pin, 40a...one tapered portion, 40
b...the other tapered part.

Claims (1)

[Scope of Claims] 1. A cassette housing in which a stored tape is passed along a front opening, and a front lid rotatably attached to the cassette housing to cover the front side of the passed tape. and a rear lid rotatably attached to the front lid to cover the rear side of the passed tape, and the rear lid is configured to be opened and closed together with the front lid. A fulcrum pin integrally molded at both ends is inserted into a pin insertion hole provided in a pair of protrusions integrally molded at positions separated from each other in the longitudinal direction on the back side of the front cover. What is claimed is: 1. A tape cassette which is inserted from the inside of a piece and rotatably supported, characterized in that the fulcrum pin or the protruding piece is provided with a tapered portion.