JPH04143985A - Tape cassette - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a tape used in a magnetic recording and reproducing apparatus, such as a video tape recorder, which records and reproduces data by winding a magnetic tape at a predetermined angle around a cylinder containing a magnetic head. Regarding cassettes.

2. Description of the Related Art As a conventional tape cassette of this type, an 8 mm tape cassette structure will be explained with reference to FIGS. 7 to 9. As shown in the figure, the magnetic tape on the supply reel 2 is stretched over the front surface of the tape cassette and reaches the take-up reel 3. 4 in the figure indicates a stretched magnetic tape. A magnetic tape 4' stretched across the front surface of the tape cassette is covered with a front cover 5 from the front side, and a back cover 6 covers the rear side of the magnetic tape 4''.

An opening 7 for inserting a post or the like is formed in the bottom of the tape cassette 1. This lid configuration will be explained in more detail. FIG. 9 is a partial sectional view of the lid of the tape cassette 1, with the front lid 5 open. The front cover 5 is rotatably supported by a fulcrum pin 8 provided on the side surface of the tape cassette 1, and the back cover 6 is supported by the front cover 5 by a support shaft provided at 6a, and by a support shaft provided at 6b. The tape cassette 1 is guided by a guide shaft that engages with a guide groove 9 provided in the tape cassette 1. When the front cover 5 is rotated, the back cover 6 is also rotated and moved to the upper part of the tape cassette 1. The result is magnetic tape 4”
is exposed to the outside. Also, Fig. 11 ay b+ C
By inserting a post or the like into the opening 7 surrounded by +d, it becomes possible to pull out the magnetic tape 4'.

Problems to be Solved by the Invention In the conventional tape cassette described above, when the front cover 5 and the back cover 6 are opened, they come to a position above the opening 7 of the tape cassette 1. That is, Figure 9 a, b,
Since the upper surface of the opening 7 surrounded by c and d is partially covered by the back cover 6, there is a restriction on the height of mechanisms such as rotating cylinders and posts that can be inserted into the opening 7. Therefore, VT
The problem was that the degree of freedom in designing the running system of the R was narrowed.

SUMMARY OF THE INVENTION The present invention solves the above problems and provides a tape cassette having a lid structure that does not impose restrictions on the height of the opening.

Means for Solving the Problems In order to achieve the above object, the present invention includes a first housing having a rectangular cross section, a supply reel, a take-up reel, and a guide post provided inside the first housing, and a supply reel provided on the supply reel. a magnetic tape supplying means whose main components include a magnetic tape that is wound and wound on a take-up reel via a guide post; and a cylindrical casing with a rectangular cross section; A tape cassette is constituted by a sliding means whose main constituent members are a second housing that fits with the outer surface of the first housing, and a rectangular lid provided on one end surface of the second housing, and The lid is opened by moving the slide means relative to the magnetic tape supply means and bringing the end face of the first casing into contact with the lid.

Effects The present invention has the above-described configuration, by moving the first casing of the magnetic tape supplying means containing the magnetic tape and the second casing of the sliding means relative to each other, and moving the first casing in which the magnetic tape is guided. The lid is opened by bringing the end face of the front surface into contact with the lid which is pivotally supported by the second housing, so that the opening surrounding the magnetic tape exposed on the front surface of the first housing has the lid Since there is no height restriction, the degree of freedom in designing the VTR running system can be increased.

EXAMPLE Hereinafter, an example of the present invention will be described based on the drawings. FIG. 1 is an exploded perspective view of the tape cassette 20. In the magnetic tape supply means 23, the magnetic tape 26 wound around the supply reel 25 is stretched in front by two posts 27 and 28 provided on the first housing 23d, and then wound onto the take-up reel 29. The space sandwiched between the magnetic tape 26 and the two rails 25 and 29 is an opening 30 into which a mechanism such as a loading post rotating cylinder is inserted. The tape cassette 20 is composed of a magnetic tape supply means 23 and a slide means 21.

The slider means 21 includes a second casing 21d that fits on the outer surface of the first casing 23d, and a front cover 31 that is pivotally supported in a shaft hole 21c.
It becomes more. Further, as shown in FIGS. 1 and 2, a guide shaft 22 is implanted in the bottom surface 21a of the second casing 21d, and a guide groove 23 provided in the bottom of the first casing 23d
It is fitted in a. One end of the slider spring 24 is locked to the guide shaft 22. Since the other end of the slider spring 24 is engaged with a pin 23e on the first housing 23d, the slide means 21 is urged in the direction of arrow A in FIG. 2 relative to the magnetic tape supply means 23.

Conversely, the magnetic tape supply means 23 is biased in the direction of arrow B relative to the slide means 21.

Therefore, the guide shaft 22 is close to the end of the guide groove 23a. In this state, the magnetic tape 26 is completely covered by the slide means 21, as shown in FIG. Further, a front cover 31 is provided on the front surface of the magnetic tape 26. As shown in FIGS. 1 and 3, this front cover 31 has a rotation shaft 32 at one end of its side surface, and is rotatably supported in a hole 21c in the side surface of the slide means 21. That is, since the front cover 31 is biased in the direction of arrow E around the rotation shaft 32 by the cover spring 33, the front cover 31 comes into contact with the front part 23b (FIG. 1) of the first housing 23, and the fourth As shown in the figure, the front cover 31 is in a closed state.

On the other hand, as shown in FIG. 3, a lock pawl 35 is rotatably supported on one side wall of the first housing 23d, and is biased in the direction of arrow F by a lock spring 36. In addition, the bottom part 21a of the second housing 21d has a narrow sleeve) 21b.
is formed, and a portion 35b of the lock pawl 35 protrudes into the slit 21b. Further, as shown in FIG. 4, the lock pin 34 of the front cover 31 is engaged with the claw portion 35a of the lock claw 35 to hold the front cover 31 in a closed state.

The lid opening/closing operation of the tape cassette 20 configured as described above will be explained.

FIG. 4 shows the tape cassette 20 when it is stored. Fifth
As shown in the figure, insert the tape cassette 20 into the cassette holder 3.
8, when the cassette holder (not shown) is inserted in the direction of arrow C, the protrusion 38a of the bottom part 38 of the cassette holder (not shown) enters the slit 21b of the slider 21, collides with the protrusion 35b of the lock claw 35, and locks against the lock spring 36. Rotate the claw 35 in the direction of arrow C. When the lock claw 35 rotates in the direction of arrow C, the front cover 31 is disengaged from the lock pin 34, so that the front cover 31 becomes freely rotatable. And slider means 2
1 comes into contact with the protrusion 38a and stops.

Further, when the magnetic tape supply means 23 is pushed in the direction C in FIG. 5, as shown in FIG.
The back surface of the front cover 31 is pressed by the slope portion 23c and the upper surface portion 23e of the cassette body 23 to perform an opening operation, and is stopped in the state shown in FIG. 6.

This exposes the built-in magnetic tape 26. Comparing FIG. 6 with the front cover 31 completely open and FIG. 9 of the conventional example, the opening in FIG. 9 is a.

This is the area surrounded by b, c, and d, and part of it is covered by the back cover 6. In contrast, the opening in FIG. 6 is a region surrounded by L, M, and N, and the area covered by the front cover 31 is extremely small compared to the conventional example. Therefore guide post in this area,
It becomes possible to freely arrange mechanisms such as rotating cylinders, and the degree of freedom in designing the running system of the VTR increases.

Effects of the Invention As is clear from the above embodiments, according to the present invention, the first casing of the magnetic tape supplying means containing the magnetic tape and the second casing of the sliding means are slidably moved relative to each other. The lid is opened by bringing the end surface of the front surface of the first casing, in which the magnetic tape is guided, into contact with the lid, which is pivotally supported by the second casing. Since the opening surrounding the magnetic tape is not limited in height by the lid, the degree of freedom in designing the VTR running system can be increased.

[Brief explanation of drawings]

FIG. 1 is an exploded perspective view of a tape cassette according to an embodiment of the present invention, FIG. 2 is a sectional plan view of the tape cassette, FIG. 3 is an exploded perspective view of the main parts of FIGS. 1 and 2, and FIG. The figure is a cross-sectional view taken along arrow C-C in Figure 2 with the front cover closed, Figure 5 is the same cross-sectional view as Figure 4 and is an explanatory diagram of the operation when inserting the cassette holder, and Figure 6 is with the front cover open. 7 is an external perspective view of a conventional tape cassette, FIG. 8 is a perspective view of a conventional tape cassette seen from the back, and FIG. 9 is a sectional view of a conventional lid opening/closing mechanism. . 20... Tape cassette, 21... Slide means, 21d... First housing, 23... Magnetic tape supply means, 24... Slider spring, 25... Supply reel, 26... Magnetism Tape, 27.28...
・Guide post, 28... Take-up reel, 31...
・Front lid (lid body), 32... Rotation axis, 33...
Lid spring, 34...mouth, cuppin, 35...lock claw, 36...lock spring. Name of agent: Patent attorney Akira Okaji and other 28th designations

Claims (4)

[Claims] (1) a first housing with a rectangular cross section, a supply reel, a take-up reel, and a guide post provided inside the first housing;
a magnetic tape supply means whose main components include a magnetic tape wound on the supply reel and wound on a take-up reel via a guide post disposed on the front surface of the first housing; and a magnetic tape supply means having a rectangular cross section. The main components include a second housing having a cylindrical housing, which fits into the outer surface of the first housing of the magnetic tape supply means, and a rectangular lid provided on one end surface of the second housing. and a slide means as a member, and the slide means slides relative to the magnetic tape supply means, and the end surface of the front surface of the first housing comes into contact with the housing, thereby opening the housing. A tape cassette that is characterized by (2) The tape cassette according to claim 1, wherein a spring placed between the first housing and the second housing biases the overlapping portion of the second housing and the first housing in a direction that reduces the size thereof. (3) A lid rotatably provided on one end surface of the second casing; and a spring placed between the lid and the second casing to bias the lid in the closing direction. tape cassette. (4) A pin provided at the tip of the lid on the second housing opposite to the rotation axis of the lid, a lock pawl that is rotatable on the shaft provided on the side wall of the first housing, and the lock pawl The lid body is held in a closed state by engaging the tip of the lock claw with the pin, and the engagement between the tip of the lock claw and the pin is released. 4. The tape cassette according to claim 3, wherein the lid body is caused to open.