JPH071583B2 - Cassette and tape loading device - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cassette and tape loading device such as a VTR, and more particularly, to a single motor without using other electrical detection or power for switching. The present invention relates to a cassette and tape loading device capable of successively loading and unloading a cassette and a tape.

Background art and its problems Conventionally, VTRs that perform front loading of cassettes
Then, there are those which have a dedicated motor for driving this, and those which also use other power for this. And, those which also use this power use another power such as a pinch plunger for switching this power.
Moreover, in both types, in order to detect the switching timing, a detection switch that detects the end of the cassette loading,
Since a detection switch for detecting the end of unloading of the tape is required, these improvements have been desired mainly in terms of cost.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and an object thereof is to load or unload cassettes and tapes with only one motor and without using another power or detection switch for switching. It is an object of the present invention to provide a cassette and tape loading device that can be sequentially and continuously performed.

SUMMARY OF THE INVENTION To achieve the above object, the present invention connects a cassette loading member for loading and unloading a cassette and a tape loading member for loading and unloading a tape to each other through a planetary gear mechanism. , A locking / releasing means for locking one member and unlocking the other member when the movement of one of the members is completed, and for loading or unloading the cassette and the tape, driving the planetary gear mechanism. It is intended to simplify the device by continuously performing the process.

Embodiment An embodiment in which the present invention is applied to a front loading VTR will be described below with reference to the drawings.

First, the outline of the apparatus will be described with reference to FIGS. The rack plate 2, which is a cassette loading member provided on the chassis 1, has its long holes 3 and 4 guided by the pins 5 and 6 fixed to the chassis 2, and is slidable in the directions of arrows a and b. It is configured. The rack 7 is provided with the racks 7 and 8, and the rack 7 is meshed with the first cassette loading gear 10 connected to the planetary gear mechanism 9 on the chassis 1. The rack 8 is meshed with the cassette loading gear 12 as shown in FIG. 3 to raise and lower the cassette holder (not shown) on which the cassette 11 is placed.

On the other hand, a loading gear 15 connected to the planetary gear mechanism 9 is meshed with a ring gear 14 of a loading ring 13 which is a tape loading member provided on the chassis 1 at a predetermined angle. And loading ring
L is pivotally supported by the pin 6 between the rack 13 and the rack 2.
A letter-shaped stop lever 16 is provided.

Next, referring to FIG. 4, the planetary gear mechanism 9 including the sun gear 21, the planetary gear 22, the internal gear 26 and the gear 23 will be described. The worm gear is provided below the rotary shaft 17 pivotally supported by the chassis 1. The worm gear 18 is fixed to the worm gear 18. The worm gear 18 has a worm 20 meshed with the motor shaft of the motor 19 (FIGS. 1 and 2). A sun gear 21 is fixed to the rotary shaft 17, and a plurality of planet gears 22 are meshed with the sun gear 21. A gear 23 is rotatably mounted on the rotary shaft 17 between the sun gear 21 and the worm gear 18, and the planetary gears 22 are pivotally supported on a support shaft 24 fixed to the gear 23. ing. This gear 23
The first cassette loading gear 10, which is pivotally supported by the support shaft 25, is meshed therewith.

On the other hand, above the rotating shaft 17, the loading gear 15 meshing with the ring gear 14 is rotatably mounted, and the gear 15 has an internal gear meshing with the planetary gear 22.
26 are integrally formed. In addition, this loading gear
The gear 27 integrally provided with 15 meshes with the gear of a mode switching cam (not shown).

Thus, the first cassette loading gear 10 is meshed with the gear 23 of the planetary gear mechanism 9, and the planetary gear 22 meshing with the internal gear 26 is rotatably attached to the support shaft 24 of this gear 23. Has been. Therefore, when the internal gear 26 is stopped, that is, when the loading ring 13 is stopped, when the sun gear 21 rotates, the planetary gear 22 revolves around the sun gear 21 while rotating. 23 rotates, which drives the first cassette loading gear 10 to rotate. On the other hand, when the sun gear 21 rotates while the gear 23 is stopped, that is, when the rack plate 2 is stopped, the planetary gears are rotated.
22 rotates around a support shaft 24, which drives the internal gear 26 and thus the loading gear 15 to rotate.

Next, the stopper lever 16 will be described with reference to FIG. 5A.
A short arm 30 of the L-shaped stop bar 16 rotatably attached to the pin 6 has a roller 31 at its tip.
Is rotatably mounted via a pin 32. on the other hand,
The rack plate 2 has a stepped guide surface against which the roller 31 abuts.
33 is formed, and at the right end portion of the guide surface 33 in FIG. 5A, an engaging surface 34 with which the roller is engaged is formed.
Are formed substantially at right angles (see FIG. 3).

Further, projecting pieces 36 and 37 project in a bifurcated manner at the tip of the longer arm 35, and the pin 38 of the loading ring 13 engages with these projecting pieces 36 and 37, whereby the stop lever
16 is configured to rotate. And chassis 1
It is urged to rotate in a clockwise direction by a tension spring 39 stretched between and, and a stop pin 40 fixed to the chassis 1 is provided at a predetermined position in the urging direction.

Next, the operation of the apparatus configured as described above will be described with reference to FIGS. 1 to 3 and FIGS. 5A and 5B.

The state before inserting the cassette into the cassette holder is
As shown in the figure, the rack plate 2 has moved to a predetermined position in the right direction and stopped, and the stopper lever 16 has its roller 31
Contacts the guide surface 33 of the rack plate 2 and is prevented from rotating in the clockwise direction. For this reason, the pin 38 of the loading ring 13 is located between the projecting pieces 36, 37 of the stopper bar 16, and is prevented from rotating in the direction of arrow c.

When the cassette is inserted into the cassette holder and the insertion is detected, the motor 19 starts rotating in a predetermined direction. However, since the first cassette loading gear 10 and the loading gear 15 are respectively connected to the planetary gear mechanism 9 as described above, and the rotation of the loading ring 13 in the direction of arrow c is blocked as described above, First, the gear 10 rotates in a predetermined direction and the rack plate 2 moves in the direction of arrow a. Therefore, the second cassette loading gear 12 meshed with the rack 8 of the rack plate 2 rotates in the direction of the arrow e, whereby the cassette holder (not shown) descends and the cassette is rotated.
11 is loaded into a predetermined position, and the rack plate 2 is prevented from moving in the direction of arrow a. At the same time, the right end of the guide surface 33, which has been in contact with the roller 31 of the stop lever 16 and moved in the direction of the arrow a, has passed the roller 31 position, so that the stop lever 16 becomes free.

Therefore, the loading ring 13 starts to rotate together with the pin 38 in the direction of arrow c this time. For this reason the stop lever 16
Is forcibly rotated in the clockwise direction through the protruding piece 36 that engages with the pin 38, and is stopped by the stop pin 40.
The roller 31 engages with the engagement surface 34 of the rack plate 2. On the other hand, the engagement between the pin 38 of the ring 13 and the protruding piece 36 is
Since it is released as shown by the one-dot chain line in FIG. 5B, the loading ring 13 continues to rotate to a predetermined position, and the tape 41 as shown in FIG. 2 is loaded on the rotary head cylinder 42. The motor 19 stops. At this time,
Engaging surface between the roller 31 of the stopper lever 16 and the rack plate 2
Since the engagement with 34 is such that it is securely held by the tension spring 39, there is no possibility that the above engagement will be disengaged and malfunction will occur due to vibration of the device.

When the cassette eject command is issued next, the motor 19
Is reversed. However, at this time, since the movement of the rack plate 2 in the direction of the arrow b is blocked by the engagement of the roller 31 of the stop lever 16 and the engagement surface 34 of the rack plate 2 as described above, the planetary gear mechanism 9 First through the loading gear
15 is reversed, so that the loading ring 13 is indicated by the arrow d.
Rotate in the direction. Then, when the pin 38 of this ring 13 comes to the position shown by the broken line in FIG. 5B, the protruding piece of the stop lever 16
Since it contacts the 37, the stopper lever 16 rotates counterclockwise against the urging force, and the locking of the rack plate 2 in the direction of the arrow b is released. At the same time, the rotation of the loading ring 13 in the direction of the arrow d is blocked by a stopper (not shown) or the like. As a result, the rack plate 2 moves in the direction of arrow b. As a result, the second cassette loading gear 12 rotates in the direction of arrow f, the cassette holder rises, the cassette 11 is ejected, and the state shown in FIG. 1 is restored.

In this way, the rack plate 2 for loading and unloading the cassette and the loading ring 13 for loading and unloading the tape 13
Are connected via the planetary gear mechanism 9 and
It is driven from 19 via this planetary gear mechanism 9. Since the two different drives of the rack plate 2 and the loading ring 13 are switched by the movement of the stopper lever 16 which moves in association with these two movements, the switching timing is changed. It does not require electrical detection for detection or a special power source for switching.

As described above, in the present invention, the cassette loading member for loading / unloading the cassette and the tape loading member for loading / unloading the tape are connected to each other via the planetary gear mechanism, and Locking and releasing means is provided between the two members, the locking and releasing means moving together with the movement of the two members and locking the one member and unlocking the other member when the movement of one member is completed, The cassette and tape loading device is configured so that the loading of the cassette and the loading of the tape or the unloading of the tape and the unloading of the cassette can be continuously performed by rotationally driving the planetary gear mechanism.

Therefore, according to the present invention, without using a cassette loading end detection switch for detecting the switching timing, a tape unloading end detection switch, or the like, and without using a special power source for switching. Even 1
The loading and unloading of the cassette and the tape can be successively performed by one motor. Therefore, the cost is greatly reduced, which is extremely advantageous.

[Brief description of drawings]

1 to 5B show the VTR of the present invention in the front loading.
FIG. 1 is a diagram showing an embodiment applied to
FIG. 1 is a schematic plan view of a VTR showing a state before being inserted into a cassette holder, FIG. 2 is a view showing a state in which a cassette and a tape have been loaded, and FIG. 3 is a front view of FIG. 4 is a detailed view of the planetary gear mechanism of FIG.
An enlarged cross-sectional view taken along the line IV-IV, FIGS. 5A and 5B are plan views showing details of the stop lever and correspond to FIGS. 1 and 2, respectively. In the reference numerals used in the drawings, 2 ... rack plate (cassette loading member) 9 ... planetary gear mechanism 11 ... cassette 13 ... loading ring (tape loading member) 16 ... stop lever (locking release means) ) 31 …… Roller 34 …… Engagement surface 38 …… Pin 41 …… Tape.

Claims (1)

[Claims] 1. A cassette loading member for loading and unloading a cassette and a tape loading member for loading and unloading a tape are connected to each other via a planetary gear mechanism, and the movement of either of the two members is performed. It was also accompanied and moved,
Locking and releasing means for locking one member and unlocking the other member when the movement of one member is completed are provided between the both members, and the planetary gear mechanism is rotationally driven to load the cassette and the tape. A cassette and tape loading device configured so that loading or tape unloading and cassette unloading can be performed continuously.