JPS5954066A - Cassette loading drive mechanism - Google Patents

Abstract

PURPOSE:To simplify a cassette loading drive mechanism and to attain a cost down, by providing an idler having a contact with either a cassette loading mechanism or a tape loading mechanism and sharing a driving source. CONSTITUTION:The 1st and the 2nd rotary levers 15 and 16 are supported in a body and coaxially with the 2nd worm wheel 13, and an idler gear 18 is supported by a support shaft 17 of a lever 15. The gear 18 engages a driving gear 14 and can touch either one of the 1st and the 2nd driving gears 7 and 9. Now if a cassette is loaded, a motor 10 revolves forward and the gear 18 revolves counterclockwise. Then the gear 18 engages with the gear 7 to load a holder 1 since the revolutions of the lever 16 are controlled by a projection 21a of an up-down lever 21. In this case, the control of the projection 21a is released, and the gear 18 engages with the gear 9 to load a tape. Thus the motor 10 is shared to simplify the driving mechanism.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention is directed to a cassette qt'' loading drive mechanism in v'IIR.

In recent years, there has been a tendency for cassettes to be loaded in VTRs using a front loading mechanism. This front loading is a cassette! Insert it through the opening in the front panel,
It is moved to the mounting position by the driving force of a motor, and is very convenient in that it is very easy to operate, but it requires a separate dedicated motor, which makes the mechanism complicated and increases costs.

The present invention has been made in view of the above-mentioned point C, and provides a cassette loading drive mechanism that simplifies the drive mechanism and reduces costs by sharing the drive source of the cassette loading mechanism with the drive source of the tape loading mechanism. It is something that can be done.

An embodiment of the present invention will be described below according to page 1121.

Figures 1 and 2 are a plan view and a side view of the mechanism of this embodiment in an unloading state. Drawing number T0 (1) is a cassette holder that is placed on a cassette and moved down from the cassette insertion position to the cassette mounting position. A protruding pin (1a) is provided on the side. (2) is a support plate that supports the cassette holder, and has a 5-shaped guide groove (2a
) is provided and engaged with the protruding pin. Further, a first worm wheel (31) is provided on the guide plate, and a U-shaped notch (4) is provided at the tip of the rotating shaft of the first worm wheel.
A rotating piece (41) having T is integrally provided. The protruding pin is loosely fitted into the notch, and the rotation of the worm wheel (31) causes the cassette holder (1) to
Guide to. A first worm (5) is engaged with the first worm wheel, and the first worm is a Bell N6Pt.
It is connected to the male 1 drive gear (71) through '.

Further, (8) is a T loading disk for tape loading operation, and a lower part (8a) is formed on the outer periphery of the lower part, and a second drive gear (9) is engaged with it.

Further, a recess (8b) is formed in the upper outer periphery of the disk.

On the other hand, flO! is a drive motor, and @2 worm a21 is connected to the drive motor via a bell) Qllv.

The @2 worm wheel (131) meshes with the @2 worm. On the same axis of the second worm wheel, the idler drive gear 041. The first and @2 rotation levers 0!51a6
1 is integrally supported. An idler gear a (to) is supported by a support shaft (lη) installed on the first rotating lever.

The idler gear meshes with the idler drive gear, and can be in two-rotation contact with either one of the first and second drive gears f71+91. Also, a spring is installed between the front fi2 first rotation lever and the idler gear. A felt (2) biased at a1 is provided so that the idler gear swings downward in the direction of rotation of the idler drive gear.Furthermore,
Rotate two more times, and the old second bar a has a through hole (16
a) and the chipping (8) of the loading disc (8).
b) Two rollers (16bl) are provided that can be fitted into the cassette holder (1). .

Furthermore, a protrusion (21a) is formed on the elevating lever to restrict clockwise rotation of the rotary lever when it is in the raised position.

Next, the operation of the mechanism of this embodiment will be explained.

First, when a cassette 1 is inserted from a cassette insertion port (not shown) on the front surface of the VTR, a cassette insertion detection switch (not shown) is turned on and the drive motor 001 rotates in the normal direction. At this time, the cassette holder (1) is in the raised position, and therefore the lifting lever 011 is also in the lifting position. ) is in contact with the

Then, due to the forward rotation of the drive motor, the second worm wheel (131) rotates clockwise, and the idler gear a is pulled to rotate counterclockwise T. Due to this rotation, the first rotation lever 051 is rotated clockwise. However, since the first rotating lever is restricted from rotating, the support shaft aη is locked in the through hole (168), and the idler gear aa is in mesh with the first drive gear (7). Driven clockwise.

Therefore, the one-turn piece (4) is driven clockwise, and the cassette holder (1) is first guided horizontally and then guided downward. When the robot is guided to the final position, the elevator lever (2B) is lowered and the two protrusions (2
Since the rotation restriction of the @2 rotation lever (161) by 1a) is released, the engagement between the idler gear and the first drive gear is released, and the idler gear is brought into rolling contact with the second drive gear (9). , the loading disk (8) is rotated clockwise via the second drive gear to load the tape.
0 At this time, when the loading disk rotates a little T, the recess (8b) that was previously facing the roller (16b)
As the roller moves T, the roller comes into sliding contact with the upper outer periphery of the loading disk. Therefore, during tape loading and tape unloading, the idler gear is held in mesh with the second drive gear C.

Next, when unloading the tape, the drive motor 0α rotates in the reverse direction. Then, the second worm wheel (13I) rotates counterclockwise, and the idler gear a8 rotates downward clockwise.Here, the first rotation lever (+51) is biased to rotate counterclockwise, but the roller ( 16b) is in sliding contact with the loading disc (8), so the idler gear is
The loading disk 2 is held in mesh with the drive gear (9) and is driven clockwise to store the tape.

When the loading disc reaches the unloading position, it faces the mouth recess (8b) as shown in FIG. 1, so that the first rotating lever is rotated counterclockwise. movement is allowed, and the idler gear is in rolling contact with the first drive gear (7). Therefore, the first worm foil (
31 is driven counterclockwise, the cassette holder (1) moves toward the cassette insertion slot (M omitted), and the cassette is ejected. At this time, when the cassette holder rises and falls a little, the second rotating lever σ
61 is for contacting T with the protrusion (21a) of the elevating lever.

The idler gear is held in mesh with the first drive gear.

'Then, when the cassette ejection is completed T, the drive motor (10
1 is de-energized.

As described above, according to the present invention C2, cassette loading and tape loading can be performed using the same drive source, reducing costs and simplifying the 8M structure, which is highly effective.

[Brief explanation of the drawing]

FIG. 1 is a plan view of a drive mechanism in an embodiment of the present invention;
FIG. 2 is a side view of the same, and FIGS. 5(a) and 5(b) are schematic diagrams showing the relationship between the cassette holder and the lift lever in different shapes, respectively. Explanation of main drawing numbers (11...cassette holder, +5In21...1
1. 2nd worm, (31α...1st, 2nd worm wheel, f71f9+...1st, turtle 2 drive gear, (
8 (... Loading disk. (101... Drive motor, 051 stop... 1st, 2nd
One-turn lever. 0.8)...Idler gear, (21+...Elevating lever,.Q5 JP-A-59-540G6 (4)

Claims (1)

[Claims] A cassette loading means for reciprocating the cassette from the insertion position to the loading position; a tape loading means for reciprocating the cheep from the storage position to the drawer position; A cassette loading drive mechanism comprising idler means in contact with each other, a drive source for driving the idler means, and means for holding the idler means in a rolling contact state.