JPS6357865B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a recording and reproducing apparatus that performs recording and reproducing by installing a tape cassette smaller than a standard tape cassette into the recording and reproducing apparatus, and particularly relates to a cassette pop-up mechanism and a take-up reel drive mechanism. The object of the present invention is to provide a recording/reproducing device that operates in conjunction with the above.

For example, a standard type tape cassette is installed in a recording and reproducing apparatus such as a standard type video tape recorder for recording and reproducing.

In order to perform recording and playback by installing a tape cassette smaller than a standard type tape cassette into such a standard type video tape recorder, the position of the supply side reel and take-up side reel of the small tape cassette must be set to the standard position. If the position of the supply reel disk and take-up reel disk corresponds to the position of the type of video tape recorder, etc., there will not be much of a problem. It's not that small.

Therefore, by making the distance between the supply reel and take-up reel of the tape cassette smaller than that of a standard type tape cassette, the tape cassette can be made substantially smaller.

However, when attempting to attach such a small tape cassette to a recording/playback device such as a standard type video tape recorder, the distance between the supply side reel and take-up side reel of the tape cassette is too large for the recording/playback device such as a video tape recorder. Since the distance between the supply side reel disk and the take-up side reel disk of the device is different, this small tape cassette is attached to a recording/playback device such as a video tape recorder and the magnetic tape wound on the reel is run. When recording and playing back, it is not possible to record and play.

Therefore, in such a case, it is sufficient to configure the supply side reel disk or take-up side reel disk of the recording/reproducing device such as a video tape recorder so that it can be moved and set according to the reel interval of the tape cassette. become. However, in order to make the reel disk movable, the mechanism becomes extremely complicated, and it is not desirable to employ it in a recording/reproducing apparatus such as a video tape recorder.

Furthermore, if an attempt is made to reduce the size of the recording/playback device to a portable type using the loading mechanism used in conventional standard video tape recorders, for example, the audio head is fixed and the loading mechanism is Due to reasons such as the need to operate while avoiding this, its size is naturally limited.

The present invention eliminates the above drawbacks, and
An embodiment of a portable recording/reproducing apparatus according to the present invention will be described below.

Figure 1 shows a compact cassette with a small amount of tape, which is smaller than a standard type cassette used in a recording/playback device such as a video tape recorder, and is used in a portable type recording/playback device. FIG. 2 is a plan view of the recording/reproducing device.

In the figure, 1 is a main body chassis, 2 is a cassette housing, and 3 is a small cassette, which is shown with the upper half removed. A supply reel 4 and a take-up reel 5 are arranged in this small cassette 3, and the distance between the supply reel 4 and take-up reel 5 is set to a standard distance that cannot be installed in this small cassette 3. The distance between the supply reel disk and the take-up reel disk of this type of recording/reproducing device is shorter than the distance between the supply side reel disk and the take-up side reel disk of this type of recording/reproducing device.

Then, the magnetic tape 6 is wound up from the supply reel 4 through the guide balls 7 and 8 so that the magnetic tape 6 travels along a predetermined running path between the supply reel 4 and the take-up reel 5. It comes to be wound on the side reel 5.

FIG. 5 is a cross-sectional view of the cassette part in FIG. 1, in which a reel disk 100 is fitted to the supply reel 4, and the take-up reel 5 is installed in the small cassette 3 with screws or the like. It is supported by a shaft 101.

Teeth are formed on the outer periphery of the lower flange of the take-up reel 5, and a notch 9 is formed in the lower half so that a gear can be engaged with the teeth.

When the above-mentioned small cassette 3 is used by being attached to this portable type recording/reproducing device, the small cassette 3 is used in the same way as when a standard type cassette is attached to a standard type recording/reproducing device. When the small cassette 3 is inserted into the pop-up mechanism of the recording/reproducing device and the pop-up mechanism is moved to the operating position, the front lid (not shown) of the small cassette 3 opens.
The loading poles 13, 14, capstan 15, etc. of the recording/reproducing device are inserted inside the magnetic tape 6 in the notches 10, 11, 12 formed in the front and bottom parts of the small cassette.
Further, the supply reel disk of the recording/reproducing device is fitted into the supply reel 4 of the small cassette 3, and the teeth of the lower flange of the take-up reel 5 mesh with the drive force transmission mechanism to the take-up reel 5, and the winding is started. The driving force of the recording/reproducing device is also transmitted to the take-side reel 5.

Next, the driving force transmission mechanism will be explained in detail.

FIG. 2 is a partially longitudinal side view showing the pop-up mechanism moved to the operating position, and FIG. 3 is a partial view of the driving force transmission mechanism with the pop-up mechanism removed.

First, the pin 18, which had been pushed up by the spring 17, is pushed down by the bottom surface 16 of the cassette housing 2, and at the same time, the pin 19, which operates together with the pin 18, is also pushed down. Therefore,
The driving force transmitting piece 21, which was locked by the pin 19, is rotated around the shaft 20, which is pivotally supported by the chassis 1, to the pin 23, which is pivotally supported by the chassis 1, by the attractive force of the spring 22. move.

A gear 25 and a gear 26 are coaxially provided on the shaft 24 supported by the driving force transmitting piece, and when the driving force transmitting piece 21 rotates to the pin 23, the gear 25 and the small cassette are connected to each other. It meshes with the teeth on the periphery of the lower flange of the take-up reel 5 of No. 3. At this time, the gear 26 and the gear 29 pivotally supported by the chassis 1 also mesh with each other.

When winding a magnetic tape, the driving force of the reel drive motor 27 is generated by an idler 28, gears 29, 2
6 and 25, and is transmitted to the take-up reel 5.

Note that during rewinding, the idler 28 moves to the position shown as 28' in the figure, and the driving force of the reel drive motor 27 is transmitted to the supply side reel 4 through the idler 28 located at the position shown as 28'. be done.

When the pop-up mechanism is in the inoperative position, ie, moved upward, the fixing piece 30 fixed to the bottom surface 16 of the cassette housing 2 moves upward as the pop-up mechanism moves upward.

At this time, the shape of the tip 31 of the fixed piece 30 allows the driving force transmitting piece 21, which is rotated counterclockwise about the shaft 20 by the spring 22, to
Rotate clockwise.

When the driving force transmitting piece 21 rotates around the shaft 20 to the position of the pin 19 that locks the driving force transmitting piece 21, the pin 19 locks the driving force transmitting piece 21 by the spring 17. Jump upwards as far as possible.

A gear 2 is attached to the driving force transmitting piece 21 which is locked by the pin 19 and is located at a position indicated as 21' in the figure.
5 and 26 are pivotally supported, and as a result of being locked by the pin 19, the gears 25 and 26 are separated from the teeth and teeth 29 on the periphery of the lower flange of the take-up reel 5, and the reel drive motor 27 The driving force is no longer transmitted to the take-up reel 5.

Next, the loading operation of the magnetic tape will be explained. FIG. 4 is a partial view of the vicinity of the loading tooth 43 when the chassis 1 is removed;
The driving force of the loading motor 32 is applied to the pulley 3
3, belt 34, pulley 35, gears 36, 37,
38, 39, worm gear 40, gears 41, 42
The signal is then transmitted to the loading disk 43. Note that the gears 41 and 42 are coaxially supported.

When the loading tooth 43 rotates clockwise around the shaft 44, gears 45 and 46 coaxially supported with the shaft 44 rotate in the same direction.

The gears 45 and 46 are fitted with a loading belt 4 whose one side is shaped to mesh with the gears.
7 and 48 are engaged with each other, and the belts 47 and 48 pass through the loading poles 49 and 50.
As a result, the loading arms 51, 52 are pulled in the direction of the stoppers 53, 54.

An arm 57, to which an audio erase head 55 and a control head 56 are fixed by screws or the like, is attached to a shaft 57 which is rotatably supported by the chassis 1.
It is designed to be able to rotate around 0.

The arm 59 is rotatable around a shaft 59 supported by the chassis 1. A pin 60 is implanted at the tip of the arm 58 on the lower side, and a pin 60 is installed on the upper side. , pin 61 is similarly implanted.

One end of a spring 62 provided on the shaft 59 is locked to a pin 61 on the upper side of the arm 58, and the arm 58 is constantly subjected to a counterclockwise rotational force by the spring 62.

When the loading disc 43 rotates clockwise around the shaft 44, the pin 60 implanted on the lower side of the arm 58 moves along the groove 63 carved in the loading disc 43. 59
The arm 57 rotates clockwise about the shaft 50 against the force of the spring 62, and the audio erase head 55 and control head 56 also rotate in the same direction. 1 and move to the position shown by the dashed line in FIG.

As shown in FIG. 1, the kerf 63 is cut into the loading disk 43 so that the pin 60 can move smoothly.

The pinch roller 64 has arms 65, 66, 67
A pin 68 embedded in the lower side of the arm 57 rotates the loading disc 43 clockwise and rotates the loading disc 43 in a clockwise direction.
It rotates around a shaft 69 along the kerf 63 of No. 3.

Therefore, the pinch roller 64 rotates counterclockwise around the shaft 70 supported by the chassis 1 and presses against the capstan 15.

Loading belt 4 at the lower end of chassis 1
7 has one end locked to the loading arm 54, and is connected to a spring 74 via gears 71, 46, 72, 73, and this spring 74 is locked to the loading arm 51 to form a loop. ing.

Loading belt 4 above chassis 1
8 has one end locked to the loading arm 52, and is connected to a spring 78 via gears 75, 45, a guide ball 76, and a gear 77. It forms a loop.

The loading operation is carried out by the loading motor 32.
As described above, the loading disc 43 rotates clockwise due to the driving force of , and at the same time the coaxial gears 45 and 46 rotate in the same direction, and the loading arm 5 is rotated by the loading belts 47 and 48.
1 and 52 are pulled between stoppers 53 and 54.

The arm 79 rotates counterclockwise around a shaft 80, and a pin 81 implanted at the upper end of the arm 79 allows the magnetic tape 6 to be rotated as shown by the dashed line in FIG. Pull it to the arm 71' position.

When loading is completed, the path of the magnetic tape 6 moves from the supply reel 4 to the guide pole 83 in the small cassette 3, the pin 81 on the arm 79', the full width erase head 84, the impedance roller 85, and the stopper 53. The loading pole 13 and the guide pole 86 are installed on the loading arm 51.

The impedance roller 85 is provided above an arm 88, and this arm 88 is always rotated counterclockwise around a shaft 87 which is rotatably supported by the chassis 1 by a spring 89 whose one end is fixed to the chassis 1. A rotational force is applied to the

Furthermore, the path of the magnetic tape 6 is guided by a guide pole 8.
6, a guide rod 91 and a loading ball 1 are installed on the loading arm 52 which is moving to the position of the stopper 54 via a rotating drum 90 containing a rotating head (not shown).
4, in conjunction with the loading operation, the audio erase head 55 and control head 56, which were in a position where they would not interfere with the movement of the loading arm 52 at the start of the loading operation, slide into contact with the magnetic tape. The capstan, to which the guide ball 76 and the pinch roller 64 are pressed, passes through the audio erase head 55 and the control head 56 at a position rotated clockwise about the shaft 50 (the position shown by the dashed line in FIG. 1). 15 and reaches the take-up reel 5.

As described above, by configuring each mechanism, it is a portable type that eliminates the above-mentioned drawbacks and allows recording and playback by installing a small cassette in which the interval between the supply side reel and the take-up side reel is smaller than that of a standard tape cassette. A magnetic recording/reproducing device has been realized.

In the reel drive mechanism, it is only necessary to provide a portion of the reel and reel disk where the reel and reel disk are not directly connected, for example, an intermediate drive force transmission mechanism such as a gear as in the above embodiment, and the reel disk can be moved. This is extremely simple compared to the case where the reel drive mechanism is configured, and moreover, the reel drive mechanism is less likely to break down.

In addition, as mentioned above, the connection and disconnection of the driving force transmission between the drive source of the reel drive mechanism and the reel is constructed with a simple and small mechanism, and is related to the vertical movement of the pop-up mechanism, so there is no waste in the operation and the connection is simple. Transfer bonding and non-bonding can be reliably performed.

In particular, in this embodiment, the rotation transmission mechanism between the reel and the reel disk is arranged on the take-up side gear, drive roller, or other transmission means instead of the take-up reel and reel disk. Compared to the case where the rotation transmission mechanism is disposed on the side reel and the supply reel disk, the rotation transmission mechanism, for example, a gear, does not need to be arranged with high accuracy, and the rotation transmission mechanism can be installed more easily.

That is, since the magnetic tape is driven by a capstan, the uneven winding rotation of the winding reel does not directly affect recording and reproduction.

In the loading mechanism, using a loading disk whose diameter is extremely smaller than the diameter of a predetermined rotating drum, the movement of the audio head etc. and the pressing operation of the pinch roller against the capstan are linked with the loading operation. As an integrated mechanism, it is extremely compact and simple.

As mentioned above, each mechanism of the portable magnetic recording/reproducing apparatus according to the present invention is simple and compact, so the distance between the supply reel and take-up reel is smaller than that of a standard tape cassette. In combination with the use of a small tape cassette, it is possible to realize an extremely small portable recording and reproducing device, and when moving the reel drive mechanism such as gears and drive rollers to the operating position of the cassette, it is possible to It is in a non-operating position where it cannot be connected to the reel in the cassette, and after the cassette moves to the operating position, it moves to the operating position where it is connected to the reel in the cassette, so it can be reliably connected to the reel in the cassette. It has the characteristics that it is particularly effective when applied to a case where the reel flange has a driven portion at the peripheral edge.

[Brief explanation of drawings]

Fig. 1 is a plan view of one embodiment of the recording/reproducing device according to the present invention, Fig. 2 is a partially omitted sectional view thereof, Fig. 3 is a partial view of the driving force transmission mechanism, and Fig. 4 is a portion of the loading mechanism. 5 are cross-sectional views of the cassette portion used in the apparatus shown in FIG. 1. 1... Chassis, 2... Cassette housing,
3...Small tape cassette, 4...Supply side reel, 5...Take-up side reel, 6...Magnetic tape, 1
5... Capstan, 51, 52... Loading arm, 64... Pinch roller, 84... Full width erase head, 85... Impedance roller, 9
0...Rotating drum.

Claims (1)

[Claims] 1. By moving the pop-up mechanism from the non-operating position to the operating position, the reel drive mechanism that is coupled to the reel of the cassette can be coupled to the reel from the non-operating position where it is not coupled to the reel. A recording/reproducing device characterized in that the device is moved to an operating position. 2. By moving the pop-up mechanism from the operating position to the non-operating position, the reel drive mechanism that is coupled to the reel of the cassette is moved from the operating position where it can be coupled to the reel to the non-operating position where it is not coupled to the reel. A recording/reproducing device characterized by: