JPH0329803Y2 - - Google Patents

Description

[Detailed description of the invention] Industrial application field The present invention relates to a cassette loading device such as a VCR, and in particular to a cassette that does not use a motor but uses the opening and closing of a door to perform front loading of the cassette. Regarding a loading device.

BACKGROUND ART AND PROBLEMS The conventional front-loading type cassette loading device uses a motor and is therefore expensive, has a complicated mechanism, and is disadvantageous in terms of space. Another disadvantage was that it was impossible to see the movement of the cassette label or tape from the front.

Purpose of the invention The present invention was made to eliminate the first drawback mentioned above.The purpose of the invention is to create a structure that allows loading and unloading of cassettes by opening and closing the door without using a motor. An object of the present invention is to provide a simple cassette loading device.

Summary of the invention In order to achieve the above object, the present invention includes a rotating door that is biased to rotate in the opening direction, a segment gear provided on the rotating door, and a segment gear related to the rotation of the segment gear. The cassette holder is equipped with a rotating lever that rotates and a cassette holder connected via a pin that engages with the rotating lever, and is configured to load and unload cassettes by opening and closing the rotating door. .

With the above configuration, it is possible to load and unload cassettes with an extremely simple structure that utilizes opening and closing of the door without using a motor.

Embodiment An embodiment in which the present invention is applied to an 8 mm VTR cassette loading device will be described below with reference to the drawings.

In Fig. 1, Fig. 3, and Fig. 5A, the symbol 1 is
A pair of left and right chassis attached to the VTR body.
Three L-shaped guide grooves 2, 3, and 4 are formed at predetermined positions on the chassis 1. On the other hand, the cassette holder 5 disposed between the pair of left and right chassis 1 includes a bottom plate 7 having a stopper 6 at the rear end;
It consists of a pair of left and right side plates 8, and three sets of pins 9, 10, 11 projecting laterally from predetermined positions on the left and right pair of side plates 8, respectively, are guided into the guide grooves 2, 3, 4. When the cassette holder 5 is moved, the cassette holder 5 is moved.

Further, the rotating door 12 is composed of a pair of left and right segment gears 13 arranged on both sides of the chassis 1, and a connecting member 14 that connects the segment gears 13 laterally. The rotating door 12 is rotatably attached to a support shaft 15 fixed to the lower corner of the chassis 1, and is urged to rotate in the opening direction by a torsion spring 16. On the other hand, on both sides of the same chassis 1, there are a pair of first intermediate gears 17 that mesh with the segment gears 13;
A pair of rotating levers 20 having a pair of gears 19a and 19b meshing with a second intermediate gear 18 integral with the
a, 20b are rotatably attached to respective support shafts 21, 22. and rotation lever 20
Engagement grooves 24 are formed inside the protruding arms 23 of a and 20b, and the cassette holder 5
The pin 10 passing through the guide groove 3 of
4 is engaged.

The connecting member 14 of the rotating door 12 consists of a groove-shaped frame with an open top, and a transparent or translucent window 25 as shown in FIG. 5A is attached to the connecting member 14.

In addition, a third
As shown in FIG. 5A, a pair of fulcrum shafts 26
is projected inward. A reflection plate 28 having a mirror 27 attached to the front surface is rotatably attached to the fulcrum shaft 26, and the reflection plate 28 is urged forward to rotate by a torsion spring 29. There is. At a predetermined position in front of this reflector 28, there is a ceiling plate 30 that connects the left and right chassis 1.
A lamp 31 is suspended from the lamp.

Further, as shown in FIGS. 3 and 5A, a pin 32 protruding inside the front upper part of the chassis 1 has a
A push lever 34 is provided which is rotatably biased rearward by a torsion spring 33. Note that this push lever 34 is provided only on one side, and this push lever 34 is provided at a predetermined position on the chassis 1.
A stopper 35 for 4 is fixed.

Next, as shown in FIGS. 5A and 7, predetermined pins 36 and 37 are fixed to the inside of one side of the chassis 1, and the elongated holes of the pins 36 and 37 are guided to allow sliding. A movable slide plate 38 is attached, and this slide plate 38 is supported by a tension spring 39.
is biased backwards. On the other hand, a locking plate 42 having a claw 41 at its tip and locking the cassette holder 5 at the loading position is rotatably attached to the pin 40 protruding from the same side. The lock plate 42 has a pin 43 fixed to the lock plate which is connected to the elongated hole 4 of the slide plate 38.
4, the lock plate 42 is connected to this slide plate 38 by engaging with the tension spring 3.
9, it is urged to rotate counterclockwise in FIG. 5A. Note that a protruding piece 45 is provided on the slide plate 38, and this protruding piece 45
protrudes outward from a long hole 46 in the chassis 1, and this protruding piece 45 is engaged with a switch or the like (not shown).

Note that the lock plate 42 of the cassette holder 5 is
Although it is provided only on one side of the pair of chassis 1, the chassis 1 on the side that does not have this lock plate
The gear 19b attached to the gear 19b has one fewer tooth than the gear 19a. Therefore, even if segment gear 13 rotates by the same amount, gear 1
Since 9b rotates a little more, rattling on this side of the cassette holder 5 can be prevented even without the lock plate.

Next, the cassette holding mechanism and the cassette rotating lid unlocking mechanism will be explained with reference to FIGS. 8, 5A, and 3. A pair of cassette holding levers 48 are provided between the chassis 1 and the side plate 8 of the cassette holder 5, and are rotatably attached to pins 47 projecting from the side plate 8. A pin 49 projects from the presser lever 48 to the inside beyond the side plate 8 of the cassette holder 5, and by a tension spring 50 applied between the pin 49 and the side plate 8, the cassette presser lever 48 is The pin 49 is urged to rotate downward, and the pin 49 normally rests in contact with the upper end surface of the side plate 8.

In addition, another pin 5 is attached to the side plate 8 of the cassette holder 5.
1 is provided protrudingly, and a release plate 53 having a lock release claw 52 is attached to this pin 51. This release plate 53 rotates downward due to its own weight, and its protruding piece 54 releases the cassette presser lever 48.
The lock release claw 5 is placed on the pin 49 of
Position 2 is regulated.

Note that the reference numeral 56 in FIGS. 3 and 5A is
This is a positioning pin fixed on the mechanical chassis 57 that connects the lower part of the chassis 1, and reference numeral 58 in FIG. 3 is a connecting rod that connects the pair of left and right chassis 1. Further, reference numeral 59 in FIGS. 1 and 3 is a damper that moves in conjunction with the rotation of the rotation lever 19a, and is attached to the side surface of the chassis 1.

Next, the loading operation of a cassette in the apparatus constructed as described above will be explained mainly with reference to FIGS. 1, 2, and 5A to 6. First, when the rotating door 12 is opened, the first
As shown in the figure and FIG. 5A, the reflector plate 28 is in a lying state against the biasing force, and the push lever 34 is also rotated forward against the biasing force.
In this state, when the cassette 60 is inserted into the cassette holder 5 in the direction of arrow a, the upper surface of the cassette 60 comes into contact with the pin 49 of the cassette holding lever 48, and while pushing up the pin 49 against the biasing spring 50, Cassette 60 is inserted. Therefore, the inserted cassette 60 is pressed against this cassette holding lever 48.
It is in a state where it is pressed and held in the holder 5 by. At the same time, the lock claw (not shown) of the cassette 60 inserted while sliding on the bottom plate 7 of the cassette holder 5 engages with the lock release claw 52 of the release plate 53, thereby opening the rotating lid of the cassette 60. is unlocked.

When the rotating door 12 is pushed in the direction of arrow b in this state, the segment gear 13 rotates counterclockwise.
19b also rotates, which causes the rotation levers 20a,
20b rotates counterclockwise. Therefore, the pin 10 of the cassette holder 5, which is connected to the pivot levers 20a, 20b via the engagement groove 24, moves to the left in FIGS. 1 and 5A along the guide groove 3. The other pins 9 and 11 of the cassette holder 5 also move guided by the respective guide grooves 2 and 4. As a result, the cassette holder 5 moves almost horizontally to the left, resulting in the state shown in FIG. 5B.

Note that when the cassette holder 5 moves in the horizontal direction and the restraint by the cassette holder 5 and the cassette 60 is released, the push lever 34 begins to rotate in the urging direction and pushes the rear end surface of the cassette 60 (5th B). figure). Therefore, even when the cassette 60 is not fully inserted, the push lever 34 pushes the cassette 60 until its front end surface comes into contact with the stopper 6, and the cassette 60 is always kept in the correct position.

Next, when the rotating door 12 is pushed further, the pins 9, 10, 11 of the cassette holder 5 move along the vertical grooves of the respective guide grooves 2, 3, 4, so the cassette holder 5 descends. When the pin 11 reaches the lowermost end, the pin 11 is locked by the lock plate 42, and the rotating door 12 is closed and stopped. At the same time, the cassette 60 is engaged with the positioning pin 56 to restrict its position, and is also pressed in the vertical direction by the cassette holding lever 48 to prevent its vibration, and in this state loading of the cassette is completed. During the descent, the rotating lid of the unlocked cassette 60 is opened by a pin (not shown) fixed to the chassis 1.

Further, as shown in FIG. 6, as the cassette holder 5 descends, the push lever 34 further rotates toward the rear, but this rotation is stopped by a stopper 35. Also, the reflector 28 rotates forward and almost
Stops at a 45° tilted position. When loading is completed, the lamp 31 lights up and illuminates the interior, so you can see the movement of the labels and tape in the cassette 60 as clearly as if you were to pick up the closed rotating door 12 through the reflector plate 28 from the front window. It can be seen in

Next, when the eject button is pressed, a switch or the like is activated and the protruding piece 45 of the slide plate 38 in FIG.
Since the lock plate 42 is pushed in the direction of arrow c, the lock plate 42 rotates clockwise via the slide plate 38, and the pin 11 is unlocked (solid line in FIG. 6). Therefore, the cassette holder 5 and the rotating door 1 are held together by the torsion spring 16.
2 starts unloading and returns to the initial open state. The movement at this time is damper 59.
The movements are becoming more relaxed.

Effects of the invention As explained above, according to the invention, there is a rotating door that is biased to rotate in the opening direction, a segment gear provided on this rotating door, and a structure related to the rotation of this segment gear. It has a simple structure that includes a rotating lever that rotates with the lever, and a cassette holder that is connected via a pin that engages with this rotating lever.The door can be opened and closed without using a motor. Loading and unloading of the cassette can be performed using the cassette. Therefore, according to the present invention, it is possible to reduce the size and weight of the entire device, and the cost is also reduced, which is extremely advantageous.

[Brief explanation of the drawing]

The figure shows an example in which the present invention is applied to an 8 mm VTR.
Figure 4 is a view taken along the - line in Figure 2, Figure 5A and 5B are - in Figure 3.
6 is a cross-sectional view taken along the line - 4 of FIG. 4, and FIG. 7 is an exploded perspective view of the cassette holder locking mechanism. The figure is an exploded perspective view of the cassette holding mechanism and the rotating lid unlocking mechanism. In addition, in the symbols used in the drawings, 2, 3,
4...Guide groove, 5...Cassette holder, 9,1
0, 11... Pin, 12... Rotating door, 13... Segment gear, 16... Torsion spring, 20a, 20
b...Rotating lever, 23...Arm, 24...Engaging groove, 28...Reflector plate, 34...Push lever, 42...Lock plate.

Claims (1)

[Scope of utility model registration request] A rotating door that is biased to rotate in the opening direction, a segment gear provided on the rotating door, a rotating lever that rotates in relation to the rotation of the segment gear,
A cassette loading device comprising a cassette holder connected via a pin that engages with the rotating lever, and configured to load and unload cassettes by opening and closing the rotating door.