JPS62229585A - Tape cassette - Google Patents

Abstract

PURPOSE:To simplify and facilitate the fitting to as well as the removal from the rear cover, of the front cover by providing a taper on the fulcrum pin on the rear cover or the projection on the front cover. CONSTITUTION:A couple of tapers 40a, 40b tilted in the reverse direction are provided to the side face of the opposite side of a couple of left/right fulcrums 18a, 18b of the rear cover 5. In fitting the rear cover 5 to the front cover 4, after a couple of the fulcrum pins 18a are inserted obliquely from the direction of the arrow (f) in a pin insertion hole 20a of one projection 19a, the rear cover 5 is turned in the arrow (g) while one fulcrum pin 18b is used as a turning fulcrum, and the other fulcrum pin 18b is pushed into the pin insertion hole 20b of the other fulcrum pin 18b is pushed into the pin insertion hole 20b of the other projection 19b. In removing the rear cover 5 from the front cover 4, the other fulcrum pin 18b is used as the turning fulcrum and the rear cover 5 is turned in the direction of arrow g' and one fulcrum pin 18a is taken out from the pin insertion hole 20a of one projection 19a. Thus, the fitting and removal of the rear cover from/to the front cover is facilitated.

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 device such as a video tape recorder, and in particular, a 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 i body with a front cover rotatably attached to the cassette housing, and also covers the rear side of the tape. By configuring the front lid to be covered by a rear lid that is rotatably attached to the front lid, and then inserting a pair of fulcrum pins provided on the lid into pin insertion holes of a pair of protrusions provided on the front lid. In a tape cassette case in which the rear lid is rotatably supported on the front lid, by providing a tapered portion on the fulcrum pin or the protrusion, it is possible to easily attach and remove the rear lid from the front lid. It is designed to be easy to do.

[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, the cassette housing 3 constituted by the upper and lower halves 1.2, the front M4 and the rear M5 are each molded from synthetic resin. And a pair of left and right reels 6.
A magnetic tape 8 wound around the magnetic tape 7 is housed in the upper and lower halves 1.2, and the upper and lower halves 1 and 2 are fitted into each other from above and below and are joined together by a plurality of hisses 9 to form the cassette housing 3. is configured. A front opening IO is provided on the front of the Naori set housing 3 over its entire length in the left and right direction, and a pair of tapes are integrally formed on the lower half 2 at positions near both left and right ends of the front opening IO. Guided by a guide 11, the magnetic tape 8 is passed along the front opening 10 as shown in FIGS. 6 and 8. In addition, the cassette housing 3 has a front opening l inside a pair of tape guides l.
A recess 12 is formed on the rear side of O.
is partitioned from the inside of the cassette i-body 3 by a partition wall 13 which is formed integrally with the upper and lower halves 1.2 together with both tape guides 11 and has a square-shaped planar shape. Note that both the top and bottom of this recess 12 are open.

Next, as shown in FIG. 5, the front cover 4 has a planar shape of an X-shaped triangular shape, 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. ing. As shown in FIGS. 6 to 8, the front M4 has a pair of fulcrum pins 15 on both left and right sides of the Ct body 3 in order to cover the front side of the magnetic tape 8 passed along the front opening 10. The front cover 4 is attached by being inserted into a pair of pin insertion holes 16 provided on the front end side of the wall 3a on the same axis line, and the front cover 4 can be rotated up and down about both fulcrum pins 15. It is attached to the cassette housing 3.

Next, as shown in FIG. 5, an upper part 117 is integrally molded on the rear M5 along its upper edge, and a pair of fulcrum pins 18 are provided at the center of the vertical groove at both left and right ends of the rear lid 5. They are integrally molded so that they are coaxial. As shown in FIGS. 6 and 8, the rear M5 is disposed in the recess 12 parallel to the front cover 4 to cover the rear side of the magnetic tape 8 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. Furthermore, the upper IE
17 is arranged to cover the upper surface of the recess 12 as shown in FIGS. 6 and 8.

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 21 are provided. A pair of protrusions 22 are integrally molded below both fulcrum pins 18 on the rear surface of both left and right ends of the rear M5, and the side protrusions 2
A pair of guided pins 23 are integrally molded on the outside of the guide pins 2 so as to be coaxial with each other, and are loosely fitted into the side guide grooves 21.

Further, as shown in FIGS. 6 and 7, a torsion coil spring 25 is wound around the outer periphery of one fulcrum pin 15 between one end 4a of the front M4 and one side wall 3a of the cassette body 3. The torsion coil spring 25 has both front and rear ends 25a, 25
b is integrally formed on the end portion 4a and the side wall 3a.
27, respectively. Therefore, the torsion coil spring 25 biases the front cover 4 to rotate in the direction of the arrow a in FIG. 7, which is the direction of closing the cover. Further, as shown in FIG. 7, a lock lever 28 is attached to one side wall 3a of the cassette casing 3 via a fulcrum pin 29 formed integrally with the lock lever 28 so as to be rotatable back and forth. The rotor head 28 is attached to the side wall 3a and is biased to rotate in the direction of the arrow by a bent spring 30, and is engaged with a protrusion 31 integrally formed inside one end 4a of the front M4. , the front M4 is configured to be locked in the closed lid position.

According to the tape cassette constructed as described above, when the cassette is not in use, the front M4 is locked in the closed state by the lock lever 28 as shown by the solid line in FIG. 7. In this closed state, the magnetic tape 8 passing along the front opening 10 is completely covered by the front M4 and the rear lid 5 from the front and back, as shown by the solid line in FIG. It is a sealed tape cassette.

Next, when the tape cassette is installed in the video tape recorder, the lock lever 28 is moved against the spring 30 by the lock release member 33, as shown by the imaginary line in FIG.
When the front cover 4 is unlocked by being rotated in the ' direction, the front cover 4 is pushed up by the cover opening part 34, and the front cover 4 resists the torsional recoil spring 25. The front opening 1 is rotated by 90 degrees in the direction of arrow a', which is the opening direction of the lid.
0 is opened. Then, the front cover 4 is rotated by \90° in the direction of arrow a' from the closed position shown by the solid line in FIG. 8 to the open position shown by the phantom line in FIG. Since both fulcrum pins 18 of the rear M5 are also rotated in the same direction and at the same angle, the rear lid 5 as well as the front M4 can be moved from the closed lid position shown by the solid line in FIG. 8 to the open lid position shown by the imaginary line. rotated into position.

At this time, both fulcrum pins 18 are rotated in the direction of arrow a', so that both wave guide pins 23 are aligned with both guide grooves 21.
, and is moved in the direction of arrow C, and by the guiding action of both guide grooves 21, the rear M5 is moved toward both fulcrum pins 18.
The lid is opened in the direction of arrow a' while being rotated in the direction of arrow d, which is the direction of moving away from the front M4, about the front M4.

After this, when the M5 mold is opened, the guided pin 23 is moved in the direction of arrow C within 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. Also, when the mold is closed, the front M4
is rotated in the direction of arrow a in FIG. 21 in the direction of the arrow C' force, and is returned to the lower end 21a of the guide groove 21 shown by the solid line in FIG.

[Problem that the invention seeks to solve]

However, in the conventional tape cassette described above, the rear cover 5 is inserted between the pair of protrusions 19 of the front cover 4 from the rear side as shown in the direction of arrow e in FIG. As shown in FIG. 10, first insert one fulcrum pin 18 into the pin insertion hole 20 of one protrusion 19 as shown by the arrow f.
After inserting the fulcrum pin 18 obliquely from the direction, use the one fulcrum pin 18 side as a rotation fulcrum, then rotate M5 in the direction of arrow g, and insert the other fulcrum pin 18 into the pin insertion hole 20 of the other protrusion 19. In addition, the projecting piece 19 is configured to be biased in the direction of the arrow as shown by the imaginary line against elasticity, and then to be attached by snapping it in.

Therefore, in the past, it was relatively easy to attach the rear cover 5 to the front M4, but conversely, the rear Di5 could be attached to the front M4.
The work of removing the lid 5 from the lid 5 was not as easy as the above-mentioned installation, and subsequent removal of the lid 5 was extremely troublesome. □ Therefore, the present invention makes it extremely easy to attach and remove the rear cover from the front cover.

[Means for solving problems]

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

[Effect]

According to the present invention, sometimes the rear cover can be attached to the front cover by simply pushing the fulcrum pin 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 example is shown in Figures 5 to 1.
This embodiment is almost the same as the conventional example shown in FIG.

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 a first embodiment, and in this case, a pair of left and right fulcrum pins 18a of the rear M5,
In FIG. 9 of 18b, a pair of tapered portions 40a, 40 are inclined in opposite directions on mutually opposite side surfaces in the direction of arrow e.
b.

In this case, the attachment of the rear cover 5 to the front square M4 is sometimes carried out on one fulcrum pin 1, as shown by the imaginary line in FIG.
8a into the pin insertion hole 20a of one protruding piece 19a as shown by the arrow r.
After inserting the fulcrum pin 18 diagonally from the
By rotating 1&lid 5 in the direction of arrow g using side a as a rotational fulcrum and pressing one tapered portion 40a provided on the other fulcrum pin 18b side against the outer surface of the tip of the other protruding piece 19b. , while biasing the other protruding piece 19b in the direction of the arrow as shown by the imaginary line by using the guiding action of the tapered part 40a of one of them, as shown by the solid line in FIG. The fulcrum pin 18b is attached to the other protrusion 19
It can be easily pushed into the pin insertion hole 20b of b.

Next, when removing the rear M5 from the front M4, as shown by the solid line in FIG. By pressing the other tapered part 40b provided on the 18a side 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 as shown by the imaginary line. One fulcrum pin 18a can be easily pulled out of the pin insertion hole 20a of one protruding piece 19a by snapping it out while biasing it in the direction of the arrow against elasticity. After this, the rear cover 5 is pulled out diagonally in the direction of the arrow f' force, and the other fulcrum pin 18b is attached to the other protrusion 1.
It can be pulled out of the pin insertion hole 20b of 9b.

Next, FIG. 3 shows a second embodiment. In this case, the outer and inner surfaces of the tips of the pair of projections 19a and 19b have a pair of tapers inclined in opposite directions. Part 40
a, 40b, and the rear cover 5 for the front M4.
At times, the mounting is done simply by pressing the other fulcrum pin 18b against one tapered portion 40a as described above, and then simply snapping the other fulcrum pin 18b into the pin insertion hole 20b of the other protruding piece 19b as described above. It can be inserted.

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
a can be easily removed from the pin insertion hole 20a of one of the projecting pieces 19a with a snap.

Next, FIG. 4 shows a third embodiment, in which one tapered portion 40 is attached to the outer surface of the tip of the other projecting piece 19b.
a, and a tapered portion 40b is provided on the side surface of one fulcrum pin 18a, and the rear lid 5 is sometimes attached to the front lid 4 by using the other fulcrum pin 18 as in the second embodiment.
By pressing b against one tapered portion 40a,
The other fulcrum pin 18b can be easily inserted into the pin insertion hole 20b of the other protruding piece 19b. Further, when removing the rear M5 from the front cover 4, as in the first embodiment, by pressing the other tapered portion 40b of one of the fulcrum pins 18a against the inner surface of the tip of one of the projecting pieces 19a,
One fulcrum pin 18a can be snapped out of the pin insertion hole 2Oa of one protrusion 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, on the opposite sides of the pair of fulcrum pins 18a and 18b, on the outer and inner surfaces of the tips of the pair of protrusions 19a and 19b, or on the side of one fulcrum pin 18a and the other side. A pair of tapered parts 40a and 40b are provided on the outer surface of the tip of the projection piece 19b, and the rear M5 can be attached to and removed from the front cover 4 by appropriately combining these tapered parts 40a and 40b. A pair of fulcrum pins 18a
, 18b.

Note that the present invention is applicable to tape cartridges 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 extremely easily, resulting in a very convenient product.

[Brief explanation of drawings]

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 the rear cover relative to the front cover in the first embodiment. Sectional view of main parts explaining installation and removal method, Part 3
The figure 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. 5 to 1O show conventional examples of tape cassettes for video tape recorders, in which FIG. 5 is an exploded perspective view, FIG. 6 is a plan view of the same fully assembled state, and FIG. Figure 6 is an enlarged side view along the line ■-■, Figure 8 is the same as Figure 6 ■-■
Figure 9 is an enlarged cross-sectional view of the main parts showing the direction of attaching the rear cover to the front cover, and Figure 10 is an enlarged cross-sectional view of the main parts showing the direction of attaching the rear cover to the front cover. It is a sectional view of -X cotton. In addition, in the symbols used in the drawings, 3-・・−・−・〜−−−−・−・Cassette housing 4−−
−−−−・−・・−・−・−Front cover 5−−−−−1・−・
−・・−−−−−1 Rear lid 6.7・−・−1−−−−・Reel 8−−−−−−・−・・−・−・・−Magnetic tape 1
0---------1...Front opening 15---------One fulcrum pin 16--
−・−・−−−−−Pin insertion hole 18a,・−−−
......One fulcrum pin 18b --------・-
・---m=・Other fulcrum pin 19a・・・−・−・−
・-One protruding piece 19b −−−−−−−−・−・−・・
The other protruding piece 20a----------One pin insertion hole 20b----------
Other pin insertion hole 21 - - - - - - Guide groove 23 - - - - - Guided pin 4
0a -----1...One tapered part 40b-
・−・−・−・−This is the other tapered portion.

Claims (1)

[Scope of Claims] 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. , a rear lid rotatably attached to the front lid to cover the rear side of the passed tape and opened and closed together with the front lid, the rear lid having both longitudinal ends thereof. A fulcrum pin integrally molded on the front cover 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 inside and rotatably supported, characterized in that the fulcrum pin or the protruding piece is provided with a tapered portion.