KR930003329Y1 - Tape cassette - Google Patents

Abstract

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Description

Tape cassette

1 is a perspective view showing an example of a tape cassette.

2 is an exploded perspective view of a conventional tape cassette.

3 is an internal perspective view of the upper half of the cassette of FIG.

4 to 5 show the unused state of the tape cassette.

6 is a view showing a state in use of the cassette.

7 to 8 show states in use of a tape cassette.

9 is a side view showing the internal state of the cassette.

10 is a plan view showing an example of a conventional reel brake engagement state.

11 is a cross-sectional view taken along line A-A of FIG.

12 is a plan view showing another example of a conventional reel brake engagement state.

13 is a sectional view taken along line B-B in FIG.

14 is a plan view showing an example of a reel brake engagement state according to the present invention.

FIG. 15 is a cross-sectional view taken along line C-C in FIG.

* Explanation of symbols for main parts of the drawings

1: cassette body 2: upper half

2a: side wall portion 2b: shielding wall

2c: support wall 2d: through hole for tape end detection

2e: Reel brake fixing protrusion 2f: Transparent window

2g: reel brake fixing hook 3: lower half

3a: tape opening and closing part 4a, 4b: reel hub

4c: latch 5a, 5b: reel shaft insertion hole

6: magnetic tape 7a, 7b: tape guide post

8: Front cover 8a, 8b: Cover arm

8c, 8d: Cut 9: Slider

9a, 9b: Reel shaft insertion hole 9c: Plate part

9d, 9e: Side plate part 9f, 9g: Bend part

9h, 9i: Contact piece 10a, 10b: Positioning hole

11: reel brake 11a: movement guide

11b, 11c: Brake arm 11d, 11e: Brake pin

11f: spring hook portion 11g, 11h: operation piece

11i: reel spring 11j: reel brake hole

12: lower half support wall 13: operation piece insertion hole

14: reel brake groove 15: reel brake insertion protrusion

The present invention relates to a tape cassette suitable for recording a digital signal, for example, a Codes Code Modulation (PCM) signal.

At present, a PCM recording / reproducing apparatus has been proposed which converts an analog signal such as an acoustic signal into a digital signal, for example, a PCM signal and records or reproduces on magnetic tape.

Some PCM recording and reproducing apparatuses use a rotating head to obtain a relatively high recording density.

In the PCM recording / reproducing apparatus using this rotating head, the recording or reproducing is performed while the magnetic tape is taken out of the tape cassette at the time of recording or reproducing and loaded on the drum provided with the rotating head.

However, in such a tape cassette, when a finger or the like comes into contact with the magnetic tape, and a holding component adheres to it, or dirt, etc., drop out occurs in the reproduction signal, it is necessary to seal the magnetic tape as much as possible.

In addition, a space for inserting the guide system is required so that the magnetic tape can be taken out from the tape cassette during recording or playback.

For this purpose, the tape cassette shown in FIGS. 1 to 3 is proposed. That is, in the drawing, reference numeral 1 denotes a cassette main body, and the cassette main body 1 is composed of a pair of upper half 2 and lower half 3 joined by screwing.

2f is a transparent window provided on the upper surface of the upper half part 2. In the transparent window 2f, when the reel brake 11 locks the rotation of the hubs 4a and 4b, the reel brake 11 moves toward the reel hubs 4a and 4b for a predetermined distance and then thereafter. There is a fixed hook (2g) to limit the movement and at the same time to prevent the reel brake 11 detachment.

(4a) and (4b) are a pair of reel hubs which are accommodated in the cassette main body 1 and are loosely fitted to rotate in a pair of reel-side insertion holes 5a and 5b provided at predetermined positions of the lower half 3. The magnetic tape 6 is wound around this.

Here, (2c) is the upper half support wall, and corresponding to the lower half support wall 12 of the arm portions (8a), (8b) of the front cover (8), respectively, the place of the front side of the left and right side wall portions (2a). 2 d is a through-hole provided so that light may penetrate the upper half support wall 2c in order to detect the end part of the magnetic tape 6 by thickness.

(7a) and (7b) are tape guide posts provided to be biased to the left and right side wall portions, respectively, facing the front portion, and the magnetic tape 6 is wound in parallel thereto so that the predetermined position of the front portion can travel.

(3a) is an opening / closing portion in which the lower half 3 of the rear side of the magnetic tape 6 wound around the tape guide posts 7a and 7b has a substantially rectangular shape over a predetermined width. A guide system for extracting the magnetic tape 6 from the recording and reproducing apparatus is inserted in 3a.

(8) is a front cover which is axially supported to rotate to the front side of the cassette main body 1 by arm portions 8a and 8b provided on both the left and right sides, and the front main cover 8 allows the cassette main body ( The front part of 1) is opened and closed.

(9) is an approximately " c " slider configured to slide in the front-rear direction opposite to the lower surface portion and the left and right sidewall portions of the lower half portion 3.

Reel shafts 9a and 9b formed on the slider 9 corresponding to the reel shaft insertion holes 5a and 5b in the state where the slider 9 slides backward to open the opening and closing portion 3a are respectively. It is an insertion counter.

And 10a and 10b are positioning holes formed in the lower surface part side corresponding to guide post 7a, 7b, respectively.

In addition, the reel brake 11 is demonstrated here. The reel brake 11 has a slide movement guide plate 11a which extends to the inner bottom surface of the upper half 2, and an L-shaped arm 11b formed by hanging below both left and right ends of the movement guide plate 11a, ( 11c).

In this case, brake pins 11d and 11e are provided on the back side of the movement guide plate 11a in correspondence with the reel hubs 4a and 4b, respectively.

The reel brake 11 may be installed in various ways. As shown in FIGS. 10 and 11, the reel brake 11 fixing protrusion 2e is formed in the upper half 2, which is a hole of the movement guide plate 11a. 11j) is welded and installed with a separate ultrasonic welding machine and using the shielding wall 2b of the upper half 2 and the reel brake fixing hanger 2g as shown in FIGS. 12 and 13, the upper half 2 and the transparent window There is a method to rest between (2f).

In response to the brake pins 11d and 11e, a latch is provided on the outer peripheral portion of the upper half 2 side of the reel hubs 4a and 4b.

Moreover, the spring hook part 11f is attached to the center part of the movement guide plate 11a, and the operation pieces 11g and 11h are attached to the edge part of arm 11b, 11c.

In this case, a spring 11i is applied to the spring hook portion 11f to apply a force to the reel brake 11, and the free end of the spring 11i pushes the shielding wall 2b of the upper half portion 2, As shown in Fig. 6, the reel hubs 4a and 4b are rotated by the latches of the reel hubs 4a and 4b of the brake pins 11d and 11e by the pushing force to one side of the spring 11i. Locked so that it can't be.

When the reel brake 11 is arranged in the cassette main body 1, as shown in Fig. 11, the end portions of the operating pieces 11g and 11h are supported by the support piece insertion holes 13 of the lower half 3 through the supporting wall ( When the front cover 8 is rotated upward, the protruding operation pieces 11g and 11h are arm portions 8a and 8b of the front cover 8. Pressed by the end of the reel, the reel brake 11 slides forward in response to the pushing force to one side of the spring 11i, and the brake pins 11d and 11e are the reel hubs 4a and 4b. The reel hubs 4a and 4b are made to rotate away from the latch of the motor.

In addition, the slider 9 is demonstrated based on FIG.

The slider 9 has a flat plate portion 9c connected to the lower surface portion of the lower half portion 3, and a side plate portion 9d positioned on both left and right sides of the flat plate portion 9c and connected to the left and right sidewall portions of the lower half portion 3, respectively. ) And (e) in the shape of approximately "c" from front and rear.

(9f) and (9g) represent the bent portions in which the upper end portions of the side plate portions 9d and 9e are bent into hooks, respectively. (9h) and (9i) are contact pieces which are pressed against the fixed click so as to achieve the rear slide movement of the slider by the fixed click in the device when the tape cassette is loaded into the recording / playback apparatus.

The operation of the tape cassette made in this manner will be described with reference to the drawings.

First, when not in use, as illustrated in FIGS. 4 to 7, the front cover 8 of the cassette main body 1 is closed by the front cover 8 and the slider 9 to which the force is applied by the slider leaf spring 14. Is slid forward.

At this time, the reel brake 11 is urged backward by the spring 11i, and the brake pins 11d and 11e are engaged with the latches of the reel hubs 4a and 4b and the reel hub ( Lock so that 4a) and 4b cannot rotate.

Then, the reel shaft insertion holes 5a, 5b of the cassette body 1 and the reel shaft insertion correspondence holes 9a, 9b of the slider 9 become non-compliant and at the same time, the opening and closing portion of the cassette body 1 3a is closed by the slider 9 so that dust is attached to the magnetic tape 6 through the reel shaft insertion holes 5a and 5b and the opening / closing portion 3a, or a finger or the like is attached to the magnetic tape 6. The magnetic tape 6 can be satisfactorily sealed so as not to touch it.

Further, the side plates 9d and 9e of the slider 9 abut against the lower ends of the arms 8a and 8b of the front cover 8 so that the front cover 8 cannot rotate even when the front cover 8 is about to rotate. It is locked and the front cover 9 does not rotate suddenly when not in use.

Next, when loaded into the recording / reproducing apparatus in use, a fixed clock (not shown) of the recording / reproducing apparatus is brought into contact with the slider 9 through the cutouts 8c and 8d of the front cover 8, respectively. 9h and 9i, they are slid to the rear in a predetermined position, so that the side plates 9d and 9e of the slider 9 are arm portions of the front cover 8 as shown in FIG. 8a) and 8b, so that the front cover 8 can rotate to open the front part, and at the same time, the opening and closing part 3a, the positioning holes 10a, 10b and the reel shaft insertion hole 5a. (5b) is opened.

In this state, the front cover 8 is rotated upward to open the front part by the cover rotating member (not shown) of the recording / reproducing apparatus, and the state is as shown in FIGS. 8 to 9.

In this case, when the front cover 8 rotates upward, the operating pieces 11g and 11h of the reel brake 11 are pushed forward by the lower ends of the arm portions 8a and 8b, and the reel brake ( 11) slides forward in response to the pushing force to one side of the spring 11i.

At this time, as the brake pins 11d and 11e of the reel brake 11 are engaged with the latches of the reel hubs 4a and 4b, the reel hubs 4a and 4b may rotate. To help.

The conventional cassettes as described above require expensive ultrasonic welding machines to install the reel brakes 11 as described above, or complicated structures of the transparent window 2f. This became a prolonged factor.

Accordingly, the present inventors have improved the above problems, thereby eliminating the need for a separate ultrasonic welding machine, simplifying the structure of the transparent window 2f, and simply engaging the reel brakes 11 of the upper half 2, and the like. The purpose is to provide the present invention with the effect of improvement and cost reduction.

Hereinafter, the present invention capable of concretely carrying out the above object will be described with reference to the accompanying drawings.

That is, as illustrated in FIGS. 14 and 15, a dovetail groove is formed by the reel brake 11, and the dovetail groove of the reel brake 11 is positioned at a predetermined position of the upper half corresponding thereto. The groove 14 and the protrusion 150 can be coupled to each other by forming a dovetail-type reel brake insertion protrusion 15 that can be inserted into the 14.

At this time, it is better to provide a fine gap between the groove 14 and the projection 15 so as to enable smooth front and rear slide movement of the reel brake.

What has been described above is only one embodiment of the present invention, and of course, other configurations can be taken without departing from the gist of the present invention.

For example, the same effect as the present invention can be obtained by providing the groove 14 in the upper half 2 and providing the protrusion 15 at a predetermined position of the reel brake corresponding thereto.

At this time, the groove 14 provided in the upper half 2 should not penetrate the upper half 2 as much as possible. The reason for this is that the tape cassette according to the present invention requires more dust protection than the tape cassette for a video tape recorder. When the groove 14 installed in 2) is exposed to the outside through the upper half 2, dust or the like is introduced into the gap between the groove 14 and the protrusion 15, thereby greatly reducing the quality of recording and reproduction. Because there is a possibility.

As described above, the present invention enables the installation of the reel brake with a simple configuration, which does not require an extra ultrasonic welding machine, simplifies the structure of the transparent window, and easily combines the upper half and the reel brake, improving productivity and It is a very useful design that can achieve cost-effectiveness.

Claims (1)

The front cover 8 is rotatably installed on the cassette body 1 having the opening and closing portion 3a at a predetermined position, and the slider 9 is installed on the cassette body 1 so as to be slidable. The opening and closing part 3a is opened and closed by the 8 and the slider 9, and the rotation of the front cover 8 is locked by the slider 9, and the magnetic tape 6 is wound. A tape cassette configured to control the rotation and lock of the reel hubs 4a and 4b as the reel brake 11, wherein the dovetail grooves 14 can be inserted into the reel brake 11 and the upper half 2 with each other. And a dovetail type protrusion 15 corresponding thereto to prevent the reel brake 11 from being separated, and to allow the reel brake 11 to move forward and backward in the groove or the protrusion. Tape cassette.