JPS5835749A - Cassette type recorder and reproducer - Google Patents

Abstract

PURPOSE:To prevent slack of a tape, by loading a tape cassettte to a device main body, providing a member which is shifted at the setting of an operation mode and releasing the brake of a reel through the movement of this member. CONSTITUTION:While a VTR is at the stop mode, a lever 13 is at the neutral position and a gear 12 does not gear with any of gears 2 and 3. In loading a cassette, a pair of reel stands (not shown) of the VTR are inserted into the cassette and latched to reels 9 and 10. A pin 22 is progressed into the cassette together with a fixed guide 24. In setting the operation mode, a tape 11 is drawn out and loaded, the lever 13 is turned, the gear 12 is latched with any of the gears 2 and 3 to turn the reel, a slide plate 19 moves this side, and the pin 22 turns a release lever 27 around a shaft 28 orthogonally to a low side, to turn left and right stoppers 30 to the center and to unlatch the latch with a gear 33. The tape can be made run first on this occasion, allowing to prevent the generation of slack of the tape.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a cassette type brass reproducing device, and particularly to a reel brake release mechanism thereof.

A tape cassette used in a VTRK has a pair of reels wound with magnetic tape housed in a casing.

Such tape cassettes are equipped with reel brakes to prevent the magnetic tape from loosening due to vibrations or the like when the cassette is not in use. When this cassette is installed in the main body of the apparatus, the reel brake is released by a brake release mechanism to enable running of the magnetic tape.

Some conventional reel brake release mechanisms include, for example, one in which the cassette body is opened when the cassette is mounted on the mounting body, and the reel lock is released in conjunction with the opening operation of the lid body. . Another mechanism is
In some devices, a bottle is provided at the cassette installation position of the device body, and as the cassette is installed, the bottle is inserted relatively into the cassette casing to release the brake.The disadvantage of these mechanisms is that the cassette Since the reel brake is released when the cassette is loaded, the magnetic tape becomes loose while loading and ejecting the cassette is repeated several times.

The present invention was made in view of these problems, and the reel brake is not released just by mounting the cassette on the device body, and when the cassette is switched to the operating state and is turned on, the reel brake is not released at this point. To provide a recording/reproducing device in which a reel brake is released for the first time. Therefore, even if the cassette is repeatedly loaded and ejected, the reel brake will not be released unless the main body of the device is switched to the operating state, thereby preventing the tape from being unnecessarily loosened and damaged.

The present invention will be described below with reference to embodiments and the drawings. 1 to 4 show a first embodiment of the present invention, and in this embodiment, as shown in FIGS. 1 and 2,
A pair of gears (21 (31) are arranged on the bottom surface of the chassis (11). Reel stand (6) (combined with 71).

The reel stand 16) (7) engages with a pair of reel (9) wheels in the cassette (8) mounted on the dovetail re-star device, and rotates the stiff reel (9) H. The structure is suppressed. In addition, both ends of the magnetic tape Uυ are fixed to each of the reels +9) O(I jζ, and the magnetic tape aυ is wound by these reels (91(IGK).

A gear 0 is disposed between the pair of gears (21+31), and is rotatably supported by a lever 03 via a support shaft.The lever faces a fulcrum pin a at its base end.
A heart-shaped cam ae is rotatably fixed to the chassis (supported by II. This cam ασ;
has a cam surface aυ consisting of a pair of inclined surfaces on both sides of the recess aη.
is being formed. At the top of this cam ae is a sliding plate a.
A pair of bottles installed in this sliding plate (11) engage with a pair of long holes CIDJ formed in the chassis (11), and thereby the sliding plate (11) 19 is slidably supported by the chassis (1).A bottle (A) is formed in a vertically penetrating groove in the sliding plate cod, and its lower end is received in the recess αη of the cam member. Sometimes,
The upper end passes through the long hole of the chassis (1) and the cassette (8
). In addition, a fixed guide ■ which is approximately U-shaped is connected to one end of the elongated hole (C) of the chassis (11), and the cassette (
8), this guide (2) is inserted into the inside. Also, the above sliding plate a9 is #
In Figure I2, it is urged to slide upward.

A long hole is formed in the bottom plate of the cassette (8) in correspondence with the above-mentioned bottle (2) for receiving the bottle. In addition, a release lever slope is arranged at the upper end of one end of this elongated hole (2), and both the bins 111#c integrally formed are connected to the bottom plate of the cassette (8) with a 1 m bracket.
It engages with the small hole of. Therefore, the lever is a cassette (8
) is supported so as to be rotatable about a horizontal axis parallel to the bottom plate. A pair of claws are arranged on the housing side of the release lever holder, and are rotatably supported by a pair of pins Gυ implanted in the cassette (8). The pair of plates (to) are connected to the pair of reels +9 by a common plate spring 03 having a bent shape.
1 Teeth formed on the flange (to) of Ql)
In the configuration described above, when this VTR is in stop mode, lever 0 is in the neutral position as shown in FIG. 2, and is supported by lever 03. The gear a2 is not meshed with any of the pair of gears (2+131) on both sides.In this state, the cassette 18 is mounted on the VTR. Then, the pair of reel stands (61 (71) provided in this VTR are inserted into the cassette casing through circular holes formed in the bottom plate of the cassette (8), and the pairs of reel (9) Also, the bottle (2) and the fixed guide (2) relatively enter into the cassette (18) through the elongated hole (E).

Next, when the operation button of this VTR is operated and a predetermined mode is selected, the magnetic tape Gυ is first pulled out from the front of the cassette (8) by a loading mechanism (not shown) as shown in FIG. It will be hung on the tape running path. Next, the lever a3 (not shown) is rotated, and this lever (13i) is engaged with the supported gear (121 is one of the pair of gears (2) + 37, for example, the gear (2)). The rotational force from the reel stand drive motor (not shown) is applied to gear aa and gear (2).
J is transmitted so that it can be transmitted to the reel stand (61) via the reel stand (61).

Furthermore, by rotating the upper Ayu lever (13), this lever (
A cam (16) is fixed to 13 via a support shaft (14).
1 also rotates counterclockwise around the bin a9 as shown by fgS drawing number ζ. Then, the cam surface of the cam QH+ presses the bottle 4, causing the sliding plate 0 to slide downward in FIG. 3 against the coil spring (c). Therefore, bottle (2)
moves downward in Fig. 3 inside the long hole (to) of the chassis (11) and the long hole (c) of the cassette (8), and presses the release lever (good) in the cassette (8). (C) rotates clockwise around the bottle (to) in Fig. 4. Therefore, with the rotation of this rotating lever ■, the pair of claws (to) rotate in Fig. 3 with the bottle (to) as the center. It rotates in the release direction as shown, and the engagement between these claws and the teeth of the flange of the reel (910G) is released.In other words, the reel (91Q (I indicates its brake) is released. is released and becomes rotatable. In this way, the magnetic tape aυ pulled out from one of the pair of reels 19) (It) slides into contact with a head (not shown) to perform predetermined recording or reproduction. and the winding plate on the other reel. According to the vT1 of this embodiment, the cassette (8)
The reel brake will not be released just by attaching the reel, and the reel brake will only be released when the reel (9) ae can be rotated by rotating the lever I. Therefore, the cassette (8
), the reel brake is not released and the magnetic tape aυ is not loosened by simply repeating the mounting and ejecting operations. Therefore, damage to the magnetic tape aυ can be more effectively prevented.

Next, the second embodiment of the present invention will be explained in Figures 5 to 7. In the embodiment of Naoko The explanation of the structure of is omitted. In this embodiment, the reel brake of the car'/) 181 is released in conjunction with the rotation of the loading ring for pulling out the magnetic tape aυ from the cassette (8) and mounting it on the tape running path. ing. i.e. loading ring 1
01 is formed with a stepped portion (4a) at its outer position, and a roller (421) is in contact with this stepped portion (4a). A lever (43) is linked to the lever (43) that supports this roller action at its tip.
441 is attached, and the release lever (a) is pressed through this link (44).

Therefore, attach the cassette (8) to this VTR, and
When rotating the loading ring in the counterclockwise direction as shown by the arrow in Figure #5, the magnetic tape αυ is inserted between the front surface and the opening aη of the cassette (8) by the bottle (c) on the loading ring and the pinch roller throat. drawn from;
As a result, the magnetic tape aυ is mounted on the tape running path. And Roach Ingri.

rotation value 0 rotation 1ct 7 rollers [3 is relatively stepped part O
When it crosses υ and contacts the wide part of the ring frame, the lever (43) rotates clockwise around the bottle.

Therefore, the link is pushed all the way to the right, changing from the state shown in Figure 6 to the state shown in Figure 7. Then the transmission lever
is pushed by the tip of the link and rotates around the bottle group, and as shown in Figure 7, the tip of the lever Kl enters the cassette (8) through the opening 6υ and presses the release lever cup. Therefore, in the same manner as in the first embodiment, the reel brake by the claw is about to be released, and the reel (9) (101
can be rotated. That is, in this embodiment as well, the reel brake is not released just by loading the cassette (8) into the VTR, but is released in synchronization with the loading operation of the tape aυ by the loading ring. It looks like this.

As described above, the present invention has the following advantages:
Since the reel brake in the cassette is released as the switching member moves, the reel brake will not be released only by mounting the cassette. Therefore, even if the cassette is repeatedly loaded and ejected, the tape inside the cassette will not loosen, effectively preventing damage to the tape, and eliminating accidents caused by tape loosening.

[Brief explanation of the drawing]

Fig. 1 is an exploded perspective view of the main parts of a VTR according to an embodiment of the present invention, Fig. 2 is a plan view of the housing part, and Fig. 3 is a plane similar to Fig. 2 showing the release operation of the brake. Figure 4 is a sectional view taken along the line 7l-Vll in Figure 3, Figure 85 is a plan view of essential parts of a VTR according to the second embodiment of the present invention, and Figure 6 is a sectional view taken along line 7l-Vll in Figure 5. 7 is a sectional view similar to FIG. 6 in an operating state. In addition, in the encoding used in the drawing, 8)...
・・・・・・・・・・・・ Reel 0・・・・・・・・・
・・・・・・・・・ Lever αe・・・・・・・・・・・・
・・・・・・Heart-shaped cam）・・・・・・・・・・・・
・・・Bin, （Foundation）・・・・・・・・・・・・Release lever (To)・・・・・・・・・・・・Tsumene・
・・′・・・−・・・・・・Lord Ring・
・・・・・・・・・・・・・・・Double section－・・・・・・・・・
・・・・・・Link 4・・・・・・・・・・・・・・・
・It is a transmission lever. Osamu Matsuzai

Claims (1)

[Claims] A device in which a tape man set containing a reel on which a tape is wound is attached to the device main body, and the brake of the reel is released to run the tape for recording and /l or playback, The device includes a member that switches the main body of the apparatus into an operating state by the movement thereof, and a means that transmits the movement of this member to the brake of the reel. A cassette-type record-playing device characterized in that the brake is released.