JPH0313894Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a tape guide member locking mechanism for an automatic tape loading type recording and reproducing apparatus.

Prior Art In some cassette-type video tape recorders, during a tape loading operation, the magnetic tape comes out of the capstan insertion notch of the cassette, and the magnetic tape is placed at a position after the magnetic tape has passed through a gripping drive unit consisting of a pinch roller and a capstan. There is a videotape recorder that is provided with a guide pole on the take-up reel side that guides the take-up reel at a position before it enters the cassette.
This take-up side guide pole is provided to prevent the tape holding drive unit from being adversely affected by the inclination of the guide pole on the cassette entrance side.

Conventionally, a dedicated locking member is used to lock the take-up side guide pole at the tape guide position, which has resulted in problems such as an increase in the number of parts and an increase in manufacturing costs.

Means for Solving the Problems Therefore, the object of the present invention is to provide a tape guide member locking mechanism for an automatic tape loading type recording and reproducing apparatus that solves the above problems.
A loading member moves in response to the operation of the tape loading mechanism, pulls the tape out of the cassette, loads it onto a predetermined path attached to a drum having a video head, and pinches and drives the tape between a pinch roller and a capstan. In an automatic tape loading type recording and reproducing apparatus that performs recording and reproducing by running the tape along a predetermined path, the tape is inserted into the cassette at a position after the tape has passed through the pinch roller and the capstan after the tape has come out of the capstan insertion notch of the cassette. The tape guide member, which is guided at a position before entering the inside of the tape, is locked with a part of the pinch roller support arm that has moved to the pinch roller crimping position, and is locked in the position where the tape is guided. .

Embodiment Next, an embodiment of the tape guide member locking mechanism of the automatic tape loading type recording/reproducing apparatus according to the present invention will be described with reference to the drawings.

FIG. 1 is a plan view showing the state of the automatic tape loading type recording and reproducing apparatus in stop mode and the state of the tape guide member locking mechanism at this time; FIG. 2 is a plan view showing the tape loading mechanism of the apparatus shown in FIG. 1; FIG. 3 is a diagram showing the state of the reel disk braking system, tape guide member locking mechanism, etc. in the recording/reproducing mode.

In the tape automatic loading type recording and reproducing apparatus 1 shown in each figure, 2 is a chassis, 3 and 4 are loading poles, 5 is a mounted tape cassette, 6 is a supply reel disk, 7 is a take-up reel disk, and 8 is a video tape. A guide drum with a head. Furthermore, this device 1 is configured so that the tape loading operation is performed during the process in which the cam grooved worm wheel 9 rotates approximately 200 degrees in the direction of arrow _A1 , as described below, and the normal recording or playback mode is established. There is. In addition, with the tape cassette 5 installed, the loading pole 3 and tension pole 21 are installed in the notch 5a on the front side of the tape cassette 5, the loading pole 4 is installed in the notch 5b, and the capstan 2 is installed in the notch 5c.
6 and the winding side tape guide pole 27 are respectively fitted therein.

When a recording or reproducing operation is performed, the loading motor 10 is started, and this rotation is transmitted to the cam grooved worm wheel 9 via the gear mechanism 11, which rotates in the direction of arrow _A1 to the position shown in FIG. 2. The rotation of the cam grooved worm wheel 9 is transmitted via the gear mechanism 13 to a pair of stacked loading rings 14 and 15, which are rotated clockwise and counterclockwise, respectively. Rotate to the position shown. Due to the rotation of the loading rings 14 and 15, the loading pole supports 16 and 17 are moved along the guide grooves of the guide members 18 and 19, respectively.
The magnetic tape 20 is moved to the position shown in the figure (the position indicated by the two-dot chain line in FIG. 1), the poles 3 and 4 lock the magnetic tape 20, and the magnetic tape 20 is pulled out of the cassette 5. magnetic tape 2
As shown by the two-dot chain line in FIG. The tape is loaded into the tape path attached to 24. This magnetic tape 20 has a pinch roller 25
The guide drum 8 is held and driven by a capstan 26 and a capstan 26, and while the guide drum 8 is running around the guide drum 8, a video signal is recorded or reproduced by a video head.

Next, a mechanism for moving the tape guide pole 27 on the winding side and a mechanism for locking the guide pole 27 in the moved position will be explained.

The tape guide pole 27 on the winding side is connected to the chassis 2.
It is implanted at one end of an arm 31 that is pivotally supported by an upper pin 30. In the stop mode, the arm 31 is
The pin 32 at the other end is locked by the cam part 33a of the slide plate 33 located at position _P1 and rotates counterclockwise against the spring 34, and the tape guide pole 27 on the winding side is connected to the capstan 26. It is located in a position where it can be fitted into the notch 5c together with the capstan 26.

A pinch roller support arm 35 supports the pinch roller 25, and is supported by a shaft 36. This pinch roller support arm 35 is formed with a notch 35a for a guide pole lock, which is an important part of the present invention. In the stop mode, the pinch roller support arm 35 is rotated clockwise as shown in FIG. in a state that does not interfere with the movement of

During the above-mentioned rotation process of the cam grooved worm wheel 9, the arm 40 is pushed out in the direction of arrow _B1 with the pin 41 guided by the first cam groove 42, and is moved through the L-shaped rotation arm 43 to the slide plate. 33 is _an arrow
Move in the direction to position P ₂ . Due to the above movement of the slide plate 33, the arm 31 is released from the lock by the cam portion 33a and is moved approximately clockwise by the spring 34.
After rotating by 45 degrees, the take-up tape guide pole 27 locks the magnetic tape 20 and comes out through the notch 5c.

In addition, at the final stage of the rotation of the cam grooved worm wheel 9, the arm structure 44 moves into the second cam groove 4.
5, the pinch roller support arm 35 is rotated _{counterclockwise} , and the pinch roller 26 is pressed against the capstan 25. Further, due to the rotation of the pinch roller support arm 35, its locking notch 35a engages with the tape guide pole 27 on the winding side, and the tape guide pole 27
is locked so that it cannot be moved. Here, since the locking notch 35a engages with the top of the tape guide pole 27 and locks the top of the tape guide pole 27, the tape guide pole 27 is locked more stably than when the base side is locked. .

In the recording or playback mode, the magnetic tape 20 fed out from the gripping drive unit consisting of the capstan 25 and the pinch roller 26 is moved to the tape guide pole 2.
7, and then enters the cassette 5.

Further, when a stop operation is performed during the recording/reproducing mode, the worm wheel 9 rotates in the opposite direction to that described above, and a tape unloading operation is performed. The pinch roller support arm 35 rotates clockwise, and the slide plate 33 subsequently moves to the right. As a result, the tape guide pole 27 is unlocked and returned to the position close to the capstan 25.

Effects As described above, according to the tape guide member locking mechanism of the tape automatic loading type recording and reproducing apparatus according to the present invention, the tape guide member is locked at the tape guide position using the pinch roller support arm. It has the advantage that a dedicated locking member is not required, the number of parts can be reduced, and manufacturing costs can be reduced.

[Brief explanation of the drawing]

FIGS. 1 and 2 show an embodiment of the tape guide member locking mechanism of the present invention together with an automatic tape loading type recording and reproducing apparatus in which the mechanism is incorporated, in a stop mode state and a recording and reproducing mode state, respectively. FIG. 1... Tape automatic loading type recording and reproducing device, 3, 4
... Loading pole, 5 ... Tape cassette, 6 ... Supply reel disk, 7 ... Take-up reel disk, 8 ... Guide drum, 10 ... Loading motor, 20 ... Magnetic tape, 21 ...
Tension pole, 25...Pinch roller, 26
... Capstan, 27 ... Take-up side tape guide pole, 33 ... Slide plate, 33a ... Cam part, 35 ... Pinch roller support arm, 35a ...
...Notch for guide pole lock, 42...First cam groove, 45...Second cam groove.

Claims (1)

[Scope of utility model registration request] A loading member moves in accordance with the operation of the tape loading mechanism, pulls the tape out of the cassette, loads it onto a predetermined path attached to a drum having a video head, and drives the tape between a pinch roller and a capstan to load the tape. In an automatic tape loading type recording and reproducing apparatus that performs recording and reproducing by running the tape along a predetermined path, the tape is inserted into the cassette at a position after the tape has passed through the pinch roller and the capstan after the tape has come out of the capstan insertion notch of the cassette. Automatic tape loading in which the tape guide member that guides the tape at a position before it enters the tape is locked with a part of the pinch roller support arm that has moved to the pinch roller crimping position, and is locked in the position where the tape is guided. A tape guide member locking mechanism for a type recording/reproducing device.